FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Vavassori, P Zaluzec, N Metlushko, V Novosad, V Ilic, B Grimsditch, M AF Vavassori, P Zaluzec, N Metlushko, V Novosad, V Ilic, B Grimsditch, M TI Magnetization reversal via single and double vortex states in submicron Permalloy ellipses SO PHYSICAL REVIEW B LA English DT Article ID ARRAYS; DOTS AB The magnetization reversal mechanism in an array of submicron elliptical Permalloy elements with an aspect ratio 1.4:1 is investigated using the diffracted magneto-optic Kerr effect technique, Lorentz scanning transmission electron microscopy, and Lorentz transmission electron microscopy. The experimental results are interpreted from a comparison with micromagnetic simulations. The reversal mechanism is found to be dependent on the direction of the magnetic field and to occur via the formation of one or two vortices; the one vortex state is nucleated when the field is applied along the short axis. For the field applied along the long axis a mixture of one- and two-vortex states is observed at remanence. C1 Univ Ferrara, Dipartimento Fis, INFM, Natl Res Ctr Nanostruct & Biosyst Surfaces, I-44100 Ferrara, Italy. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA. Cornell Univ, Cornell Nanofabricat Facil, Ithaca, NY USA. Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA. RP Vavassori, P (reprint author), Univ Ferrara, Dipartimento Fis, INFM, Natl Res Ctr Nanostruct & Biosyst Surfaces, I-44100 Ferrara, Italy. RI Novosad, Valentyn/C-2018-2014; Ilic, Rob/N-1359-2014; Novosad, V /J-4843-2015; Vavassori, Paolo/B-4299-2014 OI Vavassori, Paolo/0000-0002-4735-6640 NR 15 TC 60 Z9 60 U1 0 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JUN PY 2004 VL 69 IS 21 AR 214404 DI 10.1103/PhysRevB.69.214404 PG 6 WC Physics, Condensed Matter SC Physics GA 836BO UT WOS:000222530200053 ER PT J AU Wu, YZ Won, CY Rotenberg, E Zhao, HW Smith, NV Qiu, ZQ AF Wu, YZ Won, CY Rotenberg, E Zhao, HW Smith, NV Qiu, ZQ TI Checkerboard pattern of the interlayer coupling between two Co films across Fe/Cu and Cu/Co/Cu spacer layers grown on Cu(100) SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM-WELL STATES; SHORT-PERIOD OSCILLATIONS; FCC FE FILMS; MAGNETIC PHASES; FERROMAGNETIC-LAYERS; THIN-FILMS; CU FILMS; EXCHANGE; CO(100); PHOTOEMISSION AB Quantum well (QW) states and oscillatory interlayer coupling in Co/Cu/Fe/Co/Cu(001) are investigated by angular resolved photoemission spectroscopy and x-ray magnetic linear dichroism. We find that the QW states in Cu/Fe/Co/Cu(001) depend very little on the magnetic state of the fcc Fe films. The interlayer coupling between the Co films across the Cu/Fe spacer layer displays a checkerboard pattern in Fe-Cu thickness plane. The presence of the fcc Fe ferromagnetic live layer at the Cu/Fe interface is shown to be responsible for the checkerboard pattern, which was confirmed by experiments on Co/Cu/Co/Cu/Co/Cu(100) system. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Chinese Acad Sci, Inst Phys, Int Ctr Quantum Struct, Beijing 100080, Peoples R China. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Wu, YZ (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Rotenberg, Eli/B-3700-2009; Wu, yizheng/P-2395-2014; Qiu, Zi Qiang/O-4421-2016 OI Rotenberg, Eli/0000-0002-3979-8844; Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714 NR 43 TC 2 Z9 2 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JUN PY 2004 VL 69 IS 21 AR 214410 DI 10.1103/PhysRevB.69.214410 PG 7 WC Physics, Condensed Matter SC Physics GA 836BO UT WOS:000222530200059 ER PT J AU Aniol, KA Armstrong, DS Averett, T Baylac, M Burtin, E Calarco, J Cates, GD Cavata, C Chai, Z Chang, CC Chen, JP Chudakov, E Cisbani, E Coman, M Dale, D Deur, A Djawotho, P Epstein, MB Escoffier, S Ewell, L Falletto, N Finn, JM Fissum, K Fleck, A Frois, B Frullani, S Gao, J Garibaldi, F Gasparian, A Gerstner, GM Gilman, R Glamazdin, A Gomez, J Gorbenko, V Hansen, O Hersman, F Higinbotham, DW Holmes, R Holtrop, M Humensky, TB Incerti, S Iodice, M de Jager, CW Jardillier, J Jiang, X Jones, MK Jorda, J Jutier, C Kahl, W Kelly, JJ Kim, DH Kim, MJ Kim, MS Kominis, I Kooijman, E Kramer, K Kumar, KS Kuss, M LeRose, J De Leo, R Leuschner, M Lhuillier, D Liang, M Liyanage, N Lourie, R Madey, R Malov, S Margaziotis, DJ Marie, F Markowitz, P Martino, J Mastromarino, P McCormick, K McIntyre, J Meziani, ZE Michaels, R Milbrath, B Miller, GW Mitchell, J Morand, L Neyret, D Pedrisat, C Petratos, GG Pomatsalyuk, R Price, JS Prout, D Punjabi, V Pussieux, T Quemener, G Ransome, RD Relyea, D Roblin, Y Roche, J Rutledge, GA Rutt, PM Rvachev, M Sabatie, F Saha, A Souder, PA Spradlin, M Strauch, S Suleiman, R Templon, J Teresawa, T Thompson, J Tieulent, R Todor, L Tonguc, BT Ulmer, PE Urciuoli, GM Vlahovic, B Wijesooriya, K Wilson, R Wojtsekhowski, B Woo, R Xu, W Younus, I Zhang, C AF Aniol, KA Armstrong, DS Averett, T Baylac, M Burtin, E Calarco, J Cates, GD Cavata, C Chai, Z Chang, CC Chen, JP Chudakov, E Cisbani, E Coman, M Dale, D Deur, A Djawotho, P Epstein, MB Escoffier, S Ewell, L Falletto, N Finn, JM Fissum, K Fleck, A Frois, B Frullani, S Gao, J Garibaldi, F Gasparian, A Gerstner, GM Gilman, R Glamazdin, A Gomez, J Gorbenko, V Hansen, O Hersman, F Higinbotham, DW Holmes, R Holtrop, M Humensky, TB Incerti, S Iodice, M de Jager, CW Jardillier, J Jiang, X Jones, MK Jorda, J Jutier, C Kahl, W Kelly, JJ Kim, DH Kim, MJ Kim, MS Kominis, I Kooijman, E Kramer, K Kumar, KS Kuss, M LeRose, J De Leo, R Leuschner, M Lhuillier, D Liang, M Liyanage, N Lourie, R Madey, R Malov, S Margaziotis, DJ Marie, F Markowitz, P Martino, J Mastromarino, P McCormick, K McIntyre, J Meziani, ZE Michaels, R Milbrath, B Miller, GW Mitchell, J Morand, L Neyret, D Pedrisat, C Petratos, GG Pomatsalyuk, R Price, JS Prout, D Punjabi, V Pussieux, T Quemener, G Ransome, RD Relyea, D Roblin, Y Roche, J Rutledge, GA Rutt, PM Rvachev, M Sabatie, F Saha, A Souder, PA Spradlin, M Strauch, S Suleiman, R Templon, J Teresawa, T Thompson, J Tieulent, R Todor, L Tonguc, BT Ulmer, PE Urciuoli, GM Vlahovic, B Wijesooriya, K Wilson, R Wojtsekhowski, B Woo, R Xu, W Younus, I Zhang, C CA HAPPEX Collaboration TI Parity-violating electroweak asymmetry in (e)over-right-arrowp scattering SO PHYSICAL REVIEW C LA English DT Review ID MAGNETIC FORM-FACTOR; STRUCTURE-FUNCTION G1(X); SPIN STRUCTURE-FUNCTION; FABRY-PEROT CAVITY; PROTON-SCATTERING; MATRIX-ELEMENTS; NEUTRAL-CURRENT; PRECISION-MEASUREMENT; COMPTON POLARIMETER; POLARIZED ELECTRONS AB We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from protons. Significant contributions to this asymmetry could arise from the contributions of strange form factors in the nucleon. The measured asymmetry is A=-15.05+/-0.98(stat)+/-0.56(syst) ppm at the kinematic point =12.3degrees and =0.477 (GeV/c)(2). Based on these data as well as data on electromagnetic form factors, we extract the linear combination of strange form factors G(E)(s)+0.392G(M)(s)=0.014+/-0.020+/-0.010, where the first error arises from this experiment and the second arises from the electromagnetic form factor data. This paper provides a full description of the special experimental techniques employed for precisely measuring the small asymmetry, including the first use of a strained GaAs crystal and a laser-Compton polarimeter in a fixed target parity-violation experiment. C1 Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Univ Clermont Ferrand, IN2P3, F-63177 Aubiere, France. Eastern Kentucky Univ, Richmond, KY 40475 USA. Florida Int Univ, Miami, FL 33199 USA. Univ Grenoble 1, F-38041 Grenoble, France. Univ Georgia, Athens, GA 30602 USA. Hampton Univ, Hampton, VA 23668 USA. Harvard Univ, Cambridge, MA 02138 USA. Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy. Univ Bari, I-70126 Bari, Italy. Ist Nazl Fis Nucl, Sez Roma 3, I-00146 Rome, Italy. Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy. Thomas Jefferson Natl Accelerator Lab, Newport News, VA 23606 USA. Kent State Univ, Kent, OH 44242 USA. Univ Kentucky, Lexington, KY 40506 USA. Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine. Kyungpook Natl Univ, Taegu 702701, South Korea. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Cambridge, MA 02139 USA. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. N Carolina Cent Univ, Durham, NC 27707 USA. Old Dominion Univ, Norfolk, VA 23508 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Rutgers State Univ, Piscataway, NJ 08855 USA. CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France. SUNY Stony Brook, Stony Brook, NY 11794 USA. Syracuse Univ, Syracuse, NY 13244 USA. Temple Univ, Philadelphia, PA 19122 USA. Tohoku Univ, Sendai, Miyagi 9890, Japan. TRIUMF, Vancouver, BC V6T 2A3, Canada. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. RP Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. RI Kominis, Iannis/C-5515-2011; Averett, Todd/A-2969-2011; Kuss, Michael/H-8959-2012; Higinbotham, Douglas/J-9394-2014; McIntyre, Justin/P-1346-2014; Sabatie, Franck/K-9066-2015; CAVATA, Christian/P-6496-2015; Cisbani, Evaristo/C-9249-2011 OI Higinbotham, Douglas/0000-0003-2758-6526; McIntyre, Justin/0000-0002-3706-4310; Sabatie, Franck/0000-0001-7031-3975; Cisbani, Evaristo/0000-0002-6774-8473 NR 143 TC 170 Z9 174 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 065501 DI 10.1103/PhysRevC.69.065501 PG 35 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000065 ER PT J AU Bender, M Bonche, P Duguet, T Heenen, PH AF Bender, M Bonche, P Duguet, T Heenen, PH TI Configuration mixing of angular momentum projected self-consistent mean-field states for neutron-deficient Pb isotopes SO PHYSICAL REVIEW C LA English DT Article ID SHAPE COEXISTENCE; INTRUDER STATES; ALPHA-DECAY; SUPERDEFORMED STATES; MONOPOLE STRENGTH; ROTATIONAL BANDS; WAVE-FUNCTIONS; LEAD ISOTOPES; MASS REGION; NUCLEI AB We study the low-lying collective excitation spectra of the neutron-deficient lead isotopes Pb182-194 by performing a configuration mixing of angular momentum and particle-number projected self-consistent mean-field states. The same effective interaction is used to generate the mean-field states and for the configuration mixing. We choose the Skyrme interaction SLy6 supplemented by a density-dependent zero-range pairing force. Our study supports the interpretation of the excitation spectra made on the grounds of more schematic models in terms of coexisting spherical, oblate, prolate, and superdeformed prolate structures. The model qualitatively reproduces the variation of the spectra with neutron number. Our results for E0 and E2 transition probabilities are compared with the few existing experimental data. Finally, we predict the presence of superdeformed bands at low excitation energy in the most neutron-deficient isotopes. C1 Free Univ Brussels, Serv Phys Nucl Theor, B-1050 Brussels, Belgium. CEA Saclay, Serv Phys Theor, F-91191 Gif Sur Yvette, France. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Free Univ Brussels, Serv Phys Nucl Theor, Case Postale 229, B-1050 Brussels, Belgium. RI Bender, Michael/B-9004-2009 NR 62 TC 117 Z9 119 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064303 DI 10.1103/PhysRevC.69.064303 PG 13 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000011 ER PT J AU Chiang, WT Saghai, B Tabakin, F Lee, TSH AF Chiang, WT Saghai, B Tabakin, F Lee, TSH TI Dynamical coupled-channel model of kaon-hyperon interactions SO PHYSICAL REVIEW C LA English DT Article ID 2375 MEV-C; ELECTROMAGNETIC PRODUCTION; BARYON INTERACTIONS; CHIRAL DYNAMICS; QUARK-MODEL; PHOTOPRODUCTION; MESON; SCATTERING; THRESHOLD; STRANGENESS AB The piN-->KY and KY-->KY reactions are studied using a dynamical coupled-channel model of meson-baryon interactions at energies where the baryon resonances are strongly excited. The channels included are: piN, KLambda, and KSigma. The resonances considered are: N-*[S-11(1650),P-11(1710),P-13(1720),D-13(1700)]; Delta(*)[S-31(1900),P-31(1910),P-33(1920)]; Lambda(*)[S-01(1670),P-01(1810)] Sigma(*)[P-11(1660),D-13(1670)]; and K-*(892). The basic nonresonant piN-->KY and KY-->KY transition potentials are derived from effective Lagrangians using a unitary transformation method. The dynamical coupled-channel equations are simplified by parametrizing the piN-->piN amplitudes in terms of empirical piN partial-wave amplitudes and a phenomenological off-shell function. Two models have been constructed. Model A is built by fixing all coupling constants and resonance parameters using SU(3) symmetry, the Particle Data Group values, and results from a constituent quark model. Model B is obtained by allowing most of the parameters to vary around the values of model A in fitting the data. Good fits to the available data for pi(-)p-->K(0)Lambda,K(0)Sigma(0) have been achieved. The investigated kinematics region in the center-of-mass frame goes from threshold to 2.5 GeV. The constructed models can be imbedded into associated dynamical coupled-channel studies of kaon photo- and electroproduction reactions. C1 Acad Sinica, Inst Phys, Taipei 11529, Taiwan. CEA Saclay, DSM, Dept Astrophys Phys Particules Phys Nucl & Instru, F-91191 Gif Sur Yvette, France. Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Acad Sinica, Inst Phys, Taipei 11529, Taiwan. NR 55 TC 26 Z9 26 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 065208 DI 10.1103/PhysRevC.69.065208 PG 13 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000060 ER PT J AU Clark, RM Cromaz, M Deleplanque, MA Descovich, M Diamond, RM Fallon, P Lee, IY Macchiavelli, AO Mahmud, H Rodriguez-Vieitez, E Stephens, FS Ward, D AF Clark, RM Cromaz, M Deleplanque, MA Descovich, M Diamond, RM Fallon, P Lee, IY Macchiavelli, AO Mahmud, H Rodriguez-Vieitez, E Stephens, FS Ward, D TI Searching for E(5) behavior in nuclei SO PHYSICAL REVIEW C LA English DT Article ID EVEN-EVEN NUCLEI; INTERACTING-BOSON MODEL; SYMMETRY; SYSTEM AB The properties of even-even nuclei with 30less than or equal toZless than or equal to82, Agreater than or equal to60 have been examined to find examples displaying the characteristics of E(5) critical-point behavior for the shape transition from a spherical vibrator to a triaxially soft rotor. On the basis of the known experimental state energies and E2 transition strengths, the best candidates that were identified are Pd-102, Cd-106,Cd-108, Te-124, Xe-128, and Ba-134. The closest agreement between experimental data and the predictions of E(5) is for Xe-128 and for the previously suggested example of Ba-134. It is proposed that Xe-128 may be a new example of a nucleus at the E(5) critical point. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Clark, RM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. OI Rodriguez-Vieitez, Elena/0000-0002-6639-8141 NR 26 TC 69 Z9 73 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064322 DI 10.1103/PhysRevC.69.064322 PG 7 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000030 ER PT J AU Freeman, SJ Janssens, RVF Brown, BA Carpenter, MP Fischer, SM Hammond, NJ Honma, M Lauritsen, T Lister, CJ Khoo, TL Mukherjee, G Seweryniak, D Smith, JF Varley, BJ Whitehead, M Zhu, S AF Freeman, SJ Janssens, RVF Brown, BA Carpenter, MP Fischer, SM Hammond, NJ Honma, M Lauritsen, T Lister, CJ Khoo, TL Mukherjee, G Seweryniak, D Smith, JF Varley, BJ Whitehead, M Zhu, S TI Low-lying levels in Cr-59: Inadequacy of the fp model space and onset of deformation SO PHYSICAL REVIEW C LA English DT Article ID FUSION-EVAPORATION REACTIONS; YRAST DECAY SCHEMES; NEUTRON-RICH NUCLEI; HEAVY-ION; SHELL CLOSURES; CA-48; SPIN AB The low-lying levels in Cr-59 have been studied with the C-13(Ca-48,2p) reaction at a beam energy of 130 MeV. Data on Mn-59, produced via the pn-evaporation channel, have set limits on the spin of the ground state in Cr-59 and enabled some spin-parity assignments of excited states to be made. The structure obtained in this study is clearly inconsistent with results of shell-model calculations within the full fp shell and requires inclusion of the nug(9/2) orbital. The sequence of states is understood within Nilsson model calculations assuming a moderate oblate ground-state deformation. C1 Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England. Argonne Natl Lab, Argonne, IL 60439 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. DePaul Univ, Chicago, IL 60604 USA. Univ Aizu, Ctr Math Sci, Fukushima 9658580, Japan. Univ Notre Dame, Notre Dame, IN 46556 USA. RP Freeman, SJ (reprint author), Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England. EM sjf@mags.ph.man.ac.uk RI Freeman, Sean/B-1280-2010; Carpenter, Michael/E-4287-2015 OI Freeman, Sean/0000-0001-9773-4921; Carpenter, Michael/0000-0002-3237-5734 NR 28 TC 46 Z9 46 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064301 DI 10.1103/PhysRevC.69.064301 PG 7 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000009 ER PT J AU Humphreys, RD Butler, PA Bastin, JE Greenlees, PT Hammond, NJ Herzberg, RD Jenkins, DG Jones, GD Kankaanpaa, H Keenan, A Kettunen, H Page, T Rahkila, P Scholey, C Uusitalo, J Amzal, N Brew, PMT Eskola, K Gerl, J Hauschild, K Helariutta, K Hessberger, FP Hurstel, A Jones, PM Julin, R Juutinen, S Khoo, TL Korten, W Kuusiniemi, P Le Coz, Y Leino, M Leppanen, AP Muikku, M Nieminen, P Odegard, SW Pakarinen, J Reiter, P Sletten, G Theisen, C Wollersheim, HJ AF Humphreys, RD Butler, PA Bastin, JE Greenlees, PT Hammond, NJ Herzberg, RD Jenkins, DG Jones, GD Kankaanpaa, H Keenan, A Kettunen, H Page, T Rahkila, P Scholey, C Uusitalo, J Amzal, N Brew, PMT Eskola, K Gerl, J Hauschild, K Helariutta, K Hessberger, FP Hurstel, A Jones, PM Julin, R Juutinen, S Khoo, TL Korten, W Kuusiniemi, P Le Coz, Y Leino, M Leppanen, AP Muikku, M Nieminen, P Odegard, SW Pakarinen, J Reiter, P Sletten, G Theisen, C Wollersheim, HJ TI In-beam electron spectroscopy of U-226 and No-254 SO PHYSICAL REVIEW C LA English DT Article ID SUPERHEAVY ELEMENTS; SEPARATOR; FISSION AB The energy of the 2(+)-->0(+) transition in U-226 has been measured as 81.3(6) keV and the energy of the 4(+)-->2(+) transition in No-254 has been measured as 101.1(6) keV, both for the first time, by means of electron spectroscopy. The results are close to the estimates of the energies of these transitions from earlier gamma-decay work. Absolute values of electromagnetic decay intensities have been measured for yrast transitions in both nuclei. C1 Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. Univ Jyvaskyla, Jyvaskyla 40014, Finland. Univ Helsinki, Dept Phys, Helsinki 00014, Finland. GSI Darmstadt, D-64291 Darmstadt, Germany. CEA Saclay, SPhN, DAPNIA, F-91191 Gif Sur Yvette, France. Univ Helsinki, Dept Chem, Helsinki 00014, Finland. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. Univ Munich, D-85748 Garching, Germany. Niels Bohr Inst, DK-2100 Copenhagen, Denmark. RP Butler, PA (reprint author), Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. RI Gerl, Juergen/A-3255-2011; Hauschild, Karl/A-6726-2009; Pakarinen, Janne/F-6695-2010; Herzberg, Rolf-Dietmar/E-1558-2011; KORTEN, Wolfram/H-3043-2013; Scholey, Catherine/G-2720-2014; THEISEN, Christophe/A-9343-2015; OI Pakarinen, Janne/0000-0001-8944-8757; Scholey, Catherine/0000-0002-8743-6071; THEISEN, Christophe/0000-0002-8509-1022; Butler, Peter/0000-0001-6080-9205 NR 18 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064324 DI 10.1103/PhysRevC.69.064324 PG 6 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000032 ER PT J AU Hwang, JK Ramayya, AV Hamilton, JH Luo, YX Rasmussen, JO Beyer, CJ Gore, PM Wu, SC Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Stoyer, MA Ginter, TN Zhu, SJ Cole, JD Donangelo, R AF Hwang, JK Ramayya, AV Hamilton, JH Luo, YX Rasmussen, JO Beyer, CJ Gore, PM Wu, SC Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Stoyer, MA Ginter, TN Zhu, SJ Cole, JD Donangelo, R TI High spin states in Sr-95 SO PHYSICAL REVIEW C LA English DT Article ID NUCLEI AB Twenty new gamma transitions in Sr-95 were identified from gamma-gamma-gamma coincidences in the spontaneous fission of Cf-252. New bands, based on a previously known isomeric state, T-1/2=23.6(24) ns, have been built up to a (31/2(+)) state. The states in these bands show a close similarity in transition energies to the ground band of the neighboring Sr-94, which has a spherical shape. This similarity is interpreted as the weak coupling of the 1g(7/2) neutron particle to the levels of the Sr-94(38)56 core. C1 Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. Joint Inst Heavy Ion Res, Oak Ridge, TN 37830 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Univ Fed Rio de Janeiro, BR-21941 Rio De Janeiro, Brazil. RP Hwang, JK (reprint author), Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. RI Folden, Charles/F-1033-2015 OI Folden, Charles/0000-0002-2814-3762 NR 14 TC 7 Z9 7 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 067302 DI 10.1103/PhysRevC.69.067302 PG 4 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000072 ER PT J AU Kulp, WD Wood, JL Krane, KS Loats, J Schmelzenbach, P Stapels, CJ Larimer, RM Norman, EB AF Kulp, WD Wood, JL Krane, KS Loats, J Schmelzenbach, P Stapels, CJ Larimer, RM Norman, EB TI N=90 region: The decay of Eu-154 to Gd-154 SO PHYSICAL REVIEW C LA English DT Article ID ELECTRIC MONOPOLE TRANSITIONS; VIBRATIONAL-STATES; DEFORMED-NUCLEI; LEVEL STRUCTURE; EVEN NUCLEI; BETA-DECAY; GD NUCLEI; BANDS; 154GD; ENERGY AB The decay of Eu-154-->Gd-154 has been studied by gamma-ray singles and gamma-gamma coincidence spectroscopy using an array of 20 Compton-suppressed Ge detectors. The primary goal of the work was to investigate the structure of Gd-154 above 1 MeV: The outcome is the removal of 11 levels from the previously adopted Eu-154 decay scheme, the addition of 40 new gamma-ray assignments, and upper limits set on 75 gamma-ray transitions which had been previously assigned to the Gd-154 level scheme. The current results, combined with data from other spectroscopic techniques, indicate that states which were previously interpreted as "two-phonon" excitations are either spurious or are shown to be of a different nature. These results provide a deeper understanding of the structure of Gd-154 and the N=90 isotones. C1 Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA. Oregon State Univ, Dept Phys, Corvallis, OR 97331 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Kulp, WD (reprint author), Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA. NR 39 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064309 DI 10.1103/PhysRevC.69.064309 PG 16 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000017 ER PT J AU Majumder, A Bourque, A Gale, C AF Majumder, A Bourque, A Gale, C TI Broken symmetries and dilepton production from gluon fusion in a quark gluon plasma SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR COLLISIONS; FINITE-TEMPERATURE; EQUILIBRATION AB The observational consequences of certain broken symmetries in a thermalized quark gluon plasma are elucidated. The signature under study is the spectrum of dileptons radiating from the plasma, through gluon fusion. Being a pure medium effect, this channel is nonvanishing only in plasmas with explicitly broken charge conjugation invariance. The emission rates are also sensitive to rotational invariance through the constraints imposed by Yang's theorem. This theorem is interpreted in the medium via the destructive interference between various multiple scattering diagrams obtained in the spectator picture. Rates from the fusion process are presented in comparison with those from the Born term. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 26 TC 3 Z9 3 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064901 DI 10.1103/PhysRevC.69.064901 PG 23 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000051 ER PT J AU Moretto, LG Elliott, JB Phair, L Wozniak, GJ AF Moretto, LG Elliott, JB Phair, L Wozniak, GJ TI Comment on "Negative heat capacities and first order phase transitions in nuclei" - Reply SO PHYSICAL REVIEW C LA English DT Letter AB The Clapeyron equation is adequate in describing the properties of any finite Van der Waals-like system, including Ising-Potts models. Coulomb interaction destroys the generality of solutions for finite systems, and the resulting metastability prevents meaningful application of statistical mechanics. The effective closure of unstable channels by high barriers allows for negative heat capacities only for A<30. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Moretto, LG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. NR 7 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 069802 DI 10.1103/PhysRevC.69.069802 PG 2 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000077 ER PT J AU Mueller, WF Reviol, W Carpenter, MP Janssens, RVF Kondev, FG Abu Saleem, K Ahmad, I Amro, H Bingham, CR Caggiano, J Davids, CN Hartley, D Heinz, A Herskind, B Jenkins, D Khoo, TL Lauritsen, T Ma, WC Ressler, J Riedinger, LL Sarantites, DG Seweryniak, D Siem, S Sonzogni, AA Uusitalo, J Varmette, PG Wiedenhover, I Wadsworth, R AF Mueller, WF Reviol, W Carpenter, MP Janssens, RVF Kondev, FG Abu Saleem, K Ahmad, I Amro, H Bingham, CR Caggiano, J Davids, CN Hartley, D Heinz, A Herskind, B Jenkins, D Khoo, TL Lauritsen, T Ma, WC Ressler, J Riedinger, LL Sarantites, DG Seweryniak, D Siem, S Sonzogni, AA Uusitalo, J Varmette, PG Wiedenhover, I Wadsworth, R TI High-spin states in Au-179: Spectroscopy of shape-driving orbitals beyond the neutron midshell SO PHYSICAL REVIEW C LA English DT Article ID EXCITED STRUCTURES; 1ST OBSERVATION; INTRUDER BANDS; COEXISTENCE; NUCLEI; DEFORMATION; LIFETIMES; ISOTOPES; IR-179; LIGHT AB Multiple band structures in Au-179 are established from gamma-ray spectroscopic measurements with Gammasphere at the Argonne Fragment Mass Analyzer. The yrast band, based on the 13/2(+) proton, confirms the predicted drop in excitation energy of the prolate deformed band head as compared to the heavier isotopes. The implications for the prolate energy minimum in odd-mass Au nuclei beyond the neutron i(13/2) midshell (N<102) are discussed. C1 Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Washington Univ, Dept Chem, St Louis, MO 63130 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA. Mississippi State Univ, Dept Phys, Mississippi State, MS 39762 USA. Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Univ York, Dept Phys, York YO1 5DD, N Yorkshire, England. Univ Maryland, Dept Chem, College Pk, MD 20742 USA. Univ Oslo, Dept Phys, N-0316 Oslo, Norway. RP Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. RI Ressler, Jennifer Jo/F-2279-2010; Heinz, Andreas/E-3191-2014; Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 31 TC 5 Z9 5 U1 1 U2 14 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064315 DI 10.1103/PhysRevC.69.064315 PG 10 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000023 ER PT J AU Pang, HR Ping, JL Wang, F Goldman, T Zhao, E AF Pang, HR Ping, JL Wang, F Goldman, T Zhao, E TI High strangeness dibaryons in the extended quark delocalization, color screening model SO PHYSICAL REVIEW C LA English DT Article ID DOUBLE-CHARGE-EXCHANGE; NUCLEON-NUCLEON-INTERACTION; INTERMEDIATE RANGE ATTRACTION; PI-NN RESONANCE; LOW ENERGIES; HYPERFINE INTERACTIONS; BARYON SPECTRUM; CLUSTER MODEL; SCATTERING; SYSTEMS AB Dibaryon candidates with strangeness S=-2,-3,-4,-5,-6 are studied in terms of the extended quark delocalization and color screening model. The results show that there are only a few promising low lying dibaryon states: The H and di- Omega may be marginally strong interaction stable but model uncertainties are too large to allow any definitive statement. The SIJ=-3,1/2,2 NOmega state is 62 MeV lower than the NOmega threshold and 24 MeV lower than the LambdaXipi threshold. It might appear as a narrow dibaryon resonance and be detectable in the RHIC detector through the reconstruction of the vertex mass of the LambdaXi two-body decay. The effects of explicit K and eta meson exchange have been studied and found to be negligible in this model. The mechanisms of effective intermediate range attraction, sigma meson exchange, and kinetic energy reduction due to quark delocalization are discussed. C1 Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China. Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China. Nanjing Univ, Ctr Theoret Phys, Nanjing 210093, Peoples R China. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China. RP Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China. NR 68 TC 22 Z9 25 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 065207 DI 10.1103/PhysRevC.69.065207 PG 11 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000059 ER PT J AU Peterson, RJ Allgower, CE Bekrenev, V Briscoe, WJ Comfort, JR Craig, K Grosnick, D Isenhower, D Knecht, N Koetke, D Kulbardis, AA Lolos, G Lopatin, V Manley, DM Manweiler, R Marusic, A McDonald, S Nefkens, BMK Olmsted, J Papandreou, Z Peaslee, DC Phaisangittisakul, N Price, J Prull, DE Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Strakovsky, I Supek, I AF Peterson, RJ Allgower, CE Bekrenev, V Briscoe, WJ Comfort, JR Craig, K Grosnick, D Isenhower, D Knecht, N Koetke, D Kulbardis, AA Lolos, G Lopatin, V Manley, DM Manweiler, R Marusic, A McDonald, S Nefkens, BMK Olmsted, J Papandreou, Z Peaslee, DC Phaisangittisakul, N Price, J Prull, DE Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Strakovsky, I Supek, I TI y scaling in quasifree pion-single-charge exchange SO PHYSICAL REVIEW C LA English DT Article ID INELASTIC-SCATTERING; DEUTERIUM; PROTONS AB Data for pion-single-charge exchange reactions at 750 MeV/c on complex nuclei are analyzed for y-scaling, or single scattering quasifree, responses. The angular dependence of the data is used to separate the spin and nonspin isovector responses, with comparisons to electron scattering results. C1 Univ Colorado, Boulder, CO 80309 USA. Indiana Univ, Cyclotron Facil, Bloomington, IN 47405 USA. Petersburg Nucl Phys Inst, RU-188350 Gatchina, Russia. George Washington Univ, Washington, DC 20052 USA. Arizona State Univ, Tempe, AZ 85287 USA. Valparaiso Univ, Valparaiso, IN 46383 USA. Abilene Christian Univ, Abilene, TX 79699 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Kent State Univ, Kent, OH 44242 USA. Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA. TRIUMF, Vancouver, BC V6T 2A3, Canada. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Univ Maryland, College Pk, MD 20742 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Karlsruhe, D-76128 Karlsruhe, Germany. Rudjer Boskovic Inst, Zagreb 10002, Croatia. RP Univ Colorado, Boulder, CO 80309 USA. OI Papandreou, Zisis/0000-0002-5592-8135 NR 16 TC 5 Z9 5 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064612 DI 10.1103/PhysRevC.69.064612 PG 8 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000047 ER PT J AU Romoli, M Vardaci, E Di Pietro, M De Francesco, A De Rosa, A Inglima, G La Commara, M Martin, B Pierroutsakou, D Sandoli, M Mazzocco, M Glodariu, T Scopel, P Signorini, C Bonetti, R Guglielmetti, A Soramel, F Stroe, L Greene, J Heinz, A Henderson, D Jiang, CL Moore, EF Pardo, RC Rehm, KE Wuosmaa, A Liang, JF AF Romoli, M Vardaci, E Di Pietro, M De Francesco, A De Rosa, A Inglima, G La Commara, M Martin, B Pierroutsakou, D Sandoli, M Mazzocco, M Glodariu, T Scopel, P Signorini, C Bonetti, R Guglielmetti, A Soramel, F Stroe, L Greene, J Heinz, A Henderson, D Jiang, CL Moore, EF Pardo, RC Rehm, KE Wuosmaa, A Liang, JF TI Measurements of F-17 scattering by Pb-208 with a new type of large solid angle detector array SO PHYSICAL REVIEW C LA English DT Article ID COULOMB BARRIER; ENERGY-LEVELS; LIGHT-NUCLEI; BREAKUP AB A new pixel-structure detector array with a large solid angle coverage has been used for the first time to study the elastic scattering of exotic F-17 nuclei from a Pb-208 target at 90.4 MeV. The experimental data have been analyzed in the framework of the optical model potential and the real and imaginary strong absorption radii have been evaluated. These quantities have been compared with those obtained for the system F-19+Pb-208 at the same energy in the center of mass frame. The F-17+Pb-208 reaction cross section is more similar to those of the systems O-16,O-17+Pb-208 rather than to the one of the system F-19+Pb-208 at similar energies: this indicates that in the energy range around the Coulomb barrier the breakup channel is still weak. The exclusive breakup cross section F-17-->O-16+p has been measured for the first time at energy below the Coulomb barrier. C1 Complesso Univ Monte S Angelo, Dept Phys Sci, I-80125 Naples, Italy. Complesso Univ Monte S Angelo, Ist Nazl Fis Nucl, I-80125 Naples, Italy. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Inst Gen Phys, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Udine, Dept Phys, I-33100 Udine, Italy. Ist Nazl Fis Nucl, I-33100 Udine, Italy. Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Padua, Italy. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Complesso Univ Monte S Angelo, Dept Phys Sci, Via Cinthia, I-80125 Naples, Italy. EM romoli@na.infn.it RI Glodariu, Tudor/F-6676-2011; Mazzocco, Marco/J-4393-2012; Heinz, Andreas/E-3191-2014; Stroe, Lucian/A-3290-2009 OI Stroe, Lucian/0000-0002-9306-3937 NR 23 TC 30 Z9 30 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064614 DI 10.1103/PhysRevC.69.064614 PG 8 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000049 ER PT J AU Tannenbaum, MJ AF Tannenbaum, MJ TI Acceptance corrections and extreme-independent models in relativistic heavy ion collisions SO PHYSICAL REVIEW C LA English DT Article ID NUCLEUS-NUCLEUS COLLISIONS; TRANSVERSE ENERGY-DISTRIBUTIONS; PLUS AU COLLISIONS; CHARGED-PARTICLE MULTIPLICITY; P+A COLLISIONS; 14.6A GEV/C; ALPHA-ALPHA; REGION; FLOW; EMISSION AB Kopeliovich's suggestion [ Phys. Rev. C 68, 044906 (2003) ] to perform nuclear geometry (Glauber) calculations using different cross sections according to the experimental configuration is quite different from the standard practice of the last 20 years, and leads to a different nuclear geometry definition for each experiment. The standard procedure for experimentalists is to perform the nuclear geometry calculation using the total inelastic N-N cross section, which results in a common nuclear geometry definition for all experiments. The incomplete acceptance of individual experiments is taken into account by correcting the detector response for the probability of measuring zero for an inelastic collision, which can often be determined experimentally. This clearly separates experimental issues such as different acceptances from theoretical issues which should apply in general to all experiments. Extreme-independent models are used to illustrate the conditions for which the two methods give consistent or inconsistent results. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Brookhaven Natl Lab, Upton, NY 11973 USA. OI Tannenbaum, Michael/0000-0002-8840-5314 NR 26 TC 1 Z9 1 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JUN PY 2004 VL 69 IS 6 AR 064902 DI 10.1103/PhysRevC.69.064902 PG 4 WC Physics, Nuclear SC Physics GA 834DE UT WOS:000222391000052 ER PT J AU Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alton, A Alves, GA Anderson, EW Arnoud, Y Avila, C Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baffioni, S Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blekman, F Blessing, S Boehnlein, A Bojko, NI Bolton, TA Borcherding, F Bos, K Bose, T Brandt, A Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Claes, D Clark, AR Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cummings, MAC Cutts, D da Motta, H Davis, GA De, K de Jong, SJ Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Eltzroth, JT Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fein, D Ferbel, T Filthaut, F Fisk, HE Fleuret, F Fortner, M Fox, H Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Ginther, G Gomez, B Goncharov, PI Gordon, H Gounder, K Goussiou, A Graf, N Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Han, C Hansen, S Hauptman, JM Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, J Huang, Y Iashvili, I Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kesisoglou, S Khanov, A Kharchilava, A Klima, B Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Lehner, F Leonidopoulos, C Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mattingly, SEK Mayorov, AA McCarthy, R McMahon, T Melanson, HL Melnitchouk, A Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mutaf, YD Nagy, E Nang, F Narain, M Narasimham, VS Naumann, NA Neal, HA Negret, JP Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Papageorgiou, K Parashar, N Partridge, R Parua, N Patwa, A Peters, O Petroff, P Piegaia, R Pope, BG Prosper, HB Protopopescu, S Przybycien, MB Qian, J Raja, R Rajagopalan, S Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Royon, C Rubinov, P Ruchti, R Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Sirotenko, V Slattery, P Smith, RP Snow, GR Snow, J Snyder, S Solomon, J Song, Y Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stoker, D Stolin, V Stone, A Stoyanova, DA Strang, MA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Van Kooten, R Vaniev, V Varelas, N Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A Whiteson, D Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Yu, J Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alton, A Alves, GA Anderson, EW Arnoud, Y Avila, C Babintsev, VV Babukhadia, L Bacon, TC Baden, A Baffioni, S Baldin, B Balm, PW Banerjee, S Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blekman, F Blessing, S Boehnlein, A Bojko, NI Bolton, TA Borcherding, F Bos, K Bose, T Brandt, A Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Castilla-Valdez, H Chakraborty, D Chan, KM Chekulaev, SV Cho, DK Choi, S Chopra, S Claes, D Clark, AR Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cummings, MAC Cutts, D da Motta, H Davis, GA De, K de Jong, SJ Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Eltzroth, JT Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fein, D Ferbel, T Filthaut, F Fisk, HE Fleuret, F Fortner, M Fox, H Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Ginther, G Gomez, B Goncharov, PI Gordon, H Gounder, K Goussiou, A Graf, N Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Han, C Hansen, S Hauptman, JM Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, J Huang, Y Iashvili, I Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Kesisoglou, S Khanov, A Kharchilava, A Klima, B Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Lehner, F Leonidopoulos, C Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mattingly, SEK Mayorov, AA McCarthy, R McMahon, T Melanson, HL Melnitchouk, A Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mutaf, YD Nagy, E Nang, F Narain, M Narasimham, VS Naumann, NA Neal, HA Negret, JP Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Papageorgiou, K Parashar, N Partridge, R Parua, N Patwa, A Peters, O Petroff, P Piegaia, R Pope, BG Prosper, HB Protopopescu, S Przybycien, MB Qian, J Raja, R Rajagopalan, S Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Royon, C Rubinov, P Ruchti, R Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Sirotenko, V Slattery, P Smith, RP Snow, GR Snow, J Snyder, S Solomon, J Song, Y Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stoker, D Stolin, V Stone, A Stoyanova, DA Strang, MA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Taylor, W Tentindo-Repond, S Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Van Kooten, R Vaniev, V Varelas, N Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A Whiteson, D Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Wood, DR Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Yu, J Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A CA DO Collaboration TI Search for new particles in the two-jet decay channel with the DO detector SO PHYSICAL REVIEW D LA English DT Article ID (P)OVER-BAR-P COLLISIONS; W-BOSONS; COLLIDER; QUARK; TEV AB We present the results of a search for the production of new particles decaying into two jets in (p) over barp collisions at roots=1.8 TeV, using the DO 1992-1995 data set corresponding to 109 pb(-1). We exclude at the 95% confidence level the production of excited quarks (q*) with masses below 775 GeV/c(2), the most restrictive limit to date. We also exclude standard-model-like W' (Z') bosons with masses between 300 and 800 GeV/c(2) (400 and 640 GeV/c(2)). A W-' boson with mass <786 GeV/c(2) has been excluded by previous measurements, and our lower limit is therefore the most stringent to date. C1 Joint Inst Nucl Res, Dubna, Russia. Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ, Ctr Particle Phys, Prague, Czech Republic. Acad Sci Czech Republ, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3, Grenoble, France. Univ Mediterranee, CPPM, CNRS, IN2P3, Marseille, France. Lab Accelerateur Lineaire, CNRS, IN2P3, F-91405 Orsay, France. Univ Paris 06, LPNHE, CNRS, IN2P3, Paris, France. Univ Paris 07, LPNHE, CNRS, IN2P3, Paris, France. CEA, DAPNIA, Serv Phys Particules, Saclay, France. Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. CINVESTAV, Mexico City 14000, DF, Mexico. FOM Inst NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Iowa State Univ, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Nebraska, Lincoln, NE 68588 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Langston Univ, Langston, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Abazov, VM (reprint author), Joint Inst Nucl Res, Dubna, Russia. RI Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Dudko, Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Merkin, Mikhail/D-6809-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; Belyaev, Alexander/F-6637-2015; Chekulaev, Sergey/O-1145-2015; Nomerotski, Andrei/A-5169-2010; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011 OI Sznajder, Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117; Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489; Belyaev, Alexander/0000-0002-1733-4408; NR 17 TC 40 Z9 40 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 111101 DI 10.1103/PhysRevD.69.111101 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900001 ER PT J AU Abbott, B Abbott, R Adhikari, R Ageev, A Allen, B Amin, R Anderson, SB Anderson, WG Araya, M Armandula, H Asiri, F Aufmuth, P Aulbert, C Babak, S Balasubramanian, R Ballmer, S Barish, BC Barker, D Barker-Patton, C Barnes, M Barr, B Barton, MA Bayer, K Beausoleil, R Belczynski, K Bennett, R Berukoff, SJ Betzwieser, J Bhawal, B Bilenko, IA Billingsley, G Black, E Blackburn, K Bland-Weaver, B Bochner, B Bogue, L Bork, R Bose, S Brady, PR Braginsky, VB Brau, JE Brown, DA Brozek, S Bullington, A Buonanno, A Burgess, R Busby, D Butler, WE Byer, RL Cadonati, L Cagnoli, G Camp, JB Cantley, CA Cardenas, L Carter, K Casey, MM Castiglione, J Chandler, A Chapsky, J Charlton, P Chatterji, S Chen, Y Chickarmane, V Chin, D Christensen, N Churches, D Colacino, C Coldwell, R Coles, M Cook, D Corbitt, T Coyne, D Creighton, JDE Creighton, TD Crooks, DRM Csatorday, P Cusack, BJ Cutler, C D'Ambrosio, E Danzmann, K Davies, R Daw, E DeBra, D Delker, T DeSalvo, R Dhurandhar, S Diaz, M Ding, H Drever, RWP Dupuis, RJ Ebeling, C Edlund, J Ehrens, P Elliffe, EJ Etzel, T Evans, M Evans, T Fallnich, C Farnham, D Fejer, MM Fine, M Finn, LS Flanagan, E Freise, A Frey, R Fritschel, P Frolov, V Fyffe, M Ganezer, KS Giaime, JA Gillespie, A Goda, K Gonzalez, G Gossler, S Grandclement, P Grant, A Gray, C Gretarsson, AM Grimmett, D Grote, H Grunewald, S Guenther, M Gustafson, E Gustafson, R Hamilton, WO Hammond, M Hanson, J Hardham, C Harry, G Hartunian, A Heefner, J Hefetz, Y Heinzel, G Heng, IS Hennessy, M Hepler, N Heptonstall, A Heurs, M Hewitson, M Hindman, N Hoang, P Hough, J Hrynevych, M Hua, W Ingley, R Ito, M Itoh, Y Ivanov, A Jennrich, O Johnson, WW Johnston, W Jones, L Jungwirth, D Kalogera, V Katsavounidis, E Kawabe, K Kawamura, S Kells, W Kern, J Khan, A Killbourn, S Killow, CJ Kim, C King, C King, P Klimenko, S Kloevekorn, P Koranda, S Kotter, K Kovalik, J Kozak, D Krishnan, B Landry, M Langdale, J Lantz, B Lawrence, R Lazzarini, A Lei, M Leonhardt, V Leonor, I Libbrecht, K Lindquist, P Liu, S Logan, J Lormand, M Lubinski, M Luck, H Lyons, TT Machenschalk, B MacInnis, M Mageswaran, M Mailand, K Majid, W Malec, M Mann, F Marin, A Marka, S Maros, E Mason, J Mason, K Matherny, O Matone, L Mavalvala, N McCarthy, R McClelland, DE McHugh, M McNamara, P Mendell, G Meshkov, S Messenger, C Mitrofanov, VP Mitselmakher, G Mittleman, R Miyakawa, O Miyoki, S Mohanty, S Moreno, G Mossavi, K Mours, B Mueller, G Mukherjee, S Myers, J Nagano, S Nash, T Naundorf, H Nayak, R Newton, G Nocera, F Nutzman, P Olson, T O'Reilly, B Ottaway, DJ Ottewill, A Ouimette, D Overmier, H Owen, BJ Papa, MA Parameswariah, C Parameswariah, V Pedraza, M Penn, S Pitkin, M Plissi, M Pratt, M Quetschke, V Raab, F Radkins, H Rahkola, R Rakhmanov, M Rao, SR Redding, D Regehr, MW Regimbau, T Reilly, KT Reithmaier, K Reitze, DH Richman, S Riesen, R Riles, K Rizzi, A Robertson, DI Robertson, NA Robison, L Roddy, S Rollins, J Romano, JD Romie, J Rong, H Rose, D Rotthoff, E Rowan, S Rudiger, A Russell, P Ryan, K Salzman, I Sanders, GH Sannibale, V Sathyaprakash, B Saulson, PR Savage, R Sazonov, A Schilling, R Schlaufman, K Schmidt, V Schofield, R Schrempel, M Schutz, BF Schwinberg, P Scott, SM Searle, AC Sears, B Seel, S Sengupta, AS Shapiro, CA Shawhan, P Shoemaker, DH Shu, QZ Sibley, A Siemens, X Sievers, L Sigg, D Sintes, AM Skeldon, K Smith, JR Smith, M Smith, MR Sneddon, P Spero, R Stapfer, G Strain, KA Strom, D Stuver, A Summerscales, T Sumner, MC Sutton, PJ Sylvestre, J Takamori, A Tanner, DB Tariq, H Taylor, I Taylor, R Thorne, KS Tibbits, M Tilav, S Tinto, M Tokmakov, KV Torres, C Torrie, C Traeger, S Traylor, G Tyler, W Ugolini, D Vallisneri, M van Putten, M Vass, S Vecchio, A Vorvick, C Vyachanin, SP Wallace, L Walther, H Ward, H Ware, B Watts, K Webber, D Weidner, A Weiland, U Weinstein, A Weiss, R Welling, H Wen, L Wen, S Whelan, JT Whitcomb, SE Whiting, BF Willems, PA Williams, PR Williams, R Willke, B Wilson, A Winjum, BJ Winkler, W Wise, S Wiseman, AG Woan, G Wooley, R Worden, J Yakushin, I Yamamoto, H Yoshida, S Zawischa, I Zhang, L Zotov, N Zucker, M Zweizig, J AF Abbott, B Abbott, R Adhikari, R Ageev, A Allen, B Amin, R Anderson, SB Anderson, WG Araya, M Armandula, H Asiri, F Aufmuth, P Aulbert, C Babak, S Balasubramanian, R Ballmer, S Barish, BC Barker, D Barker-Patton, C Barnes, M Barr, B Barton, MA Bayer, K Beausoleil, R Belczynski, K Bennett, R Berukoff, SJ Betzwieser, J Bhawal, B Bilenko, IA Billingsley, G Black, E Blackburn, K Bland-Weaver, B Bochner, B Bogue, L Bork, R Bose, S Brady, PR Braginsky, VB Brau, JE Brown, DA Brozek, S Bullington, A Buonanno, A Burgess, R Busby, D Butler, WE Byer, RL Cadonati, L Cagnoli, G Camp, JB Cantley, CA Cardenas, L Carter, K Casey, MM Castiglione, J Chandler, A Chapsky, J Charlton, P Chatterji, S Chen, Y Chickarmane, V Chin, D Christensen, N Churches, D Colacino, C Coldwell, R Coles, M Cook, D Corbitt, T Coyne, D Creighton, JDE Creighton, TD Crooks, DRM Csatorday, P Cusack, BJ Cutler, C D'Ambrosio, E Danzmann, K Davies, R Daw, E DeBra, D Delker, T DeSalvo, R Dhurandhar, S Diaz, M Ding, H Drever, RWP Dupuis, RJ Ebeling, C Edlund, J Ehrens, P Elliffe, EJ Etzel, T Evans, M Evans, T Fallnich, C Farnham, D Fejer, MM Fine, M Finn, LS Flanagan, E Freise, A Frey, R Fritschel, P Frolov, V Fyffe, M Ganezer, KS Giaime, JA Gillespie, A Goda, K Gonzalez, G Gossler, S Grandclement, P Grant, A Gray, C Gretarsson, AM Grimmett, D Grote, H Grunewald, S Guenther, M Gustafson, E Gustafson, R Hamilton, WO Hammond, M Hanson, J Hardham, C Harry, G Hartunian, A Heefner, J Hefetz, Y Heinzel, G Heng, IS Hennessy, M Hepler, N Heptonstall, A Heurs, M Hewitson, M Hindman, N Hoang, P Hough, J Hrynevych, M Hua, W Ingley, R Ito, M Itoh, Y Ivanov, A Jennrich, O Johnson, WW Johnston, W Jones, L Jungwirth, D Kalogera, V Katsavounidis, E Kawabe, K Kawamura, S Kells, W Kern, J Khan, A Killbourn, S Killow, CJ Kim, C King, C King, P Klimenko, S Kloevekorn, P Koranda, S Kotter, K Kovalik, J Kozak, D Krishnan, B Landry, M Langdale, J Lantz, B Lawrence, R Lazzarini, A Lei, M Leonhardt, V Leonor, I Libbrecht, K Lindquist, P Liu, S Logan, J Lormand, M Lubinski, M Luck, H Lyons, TT Machenschalk, B MacInnis, M Mageswaran, M Mailand, K Majid, W Malec, M Mann, F Marin, A Marka, S Maros, E Mason, J Mason, K Matherny, O Matone, L Mavalvala, N McCarthy, R McClelland, DE McHugh, M McNamara, P Mendell, G Meshkov, S Messenger, C Mitrofanov, VP Mitselmakher, G Mittleman, R Miyakawa, O Miyoki, S Mohanty, S Moreno, G Mossavi, K Mours, B Mueller, G Mukherjee, S Myers, J Nagano, S Nash, T Naundorf, H Nayak, R Newton, G Nocera, F Nutzman, P Olson, T O'Reilly, B Ottaway, DJ Ottewill, A Ouimette, D Overmier, H Owen, BJ Papa, MA Parameswariah, C Parameswariah, V Pedraza, M Penn, S Pitkin, M Plissi, M Pratt, M Quetschke, V Raab, F Radkins, H Rahkola, R Rakhmanov, M Rao, SR Redding, D Regehr, MW Regimbau, T Reilly, KT Reithmaier, K Reitze, DH Richman, S Riesen, R Riles, K Rizzi, A Robertson, DI Robertson, NA Robison, L Roddy, S Rollins, J Romano, JD Romie, J Rong, H Rose, D Rotthoff, E Rowan, S Rudiger, A Russell, P Ryan, K Salzman, I Sanders, GH Sannibale, V Sathyaprakash, B Saulson, PR Savage, R Sazonov, A Schilling, R Schlaufman, K Schmidt, V Schofield, R Schrempel, M Schutz, BF Schwinberg, P Scott, SM Searle, AC Sears, B Seel, S Sengupta, AS Shapiro, CA Shawhan, P Shoemaker, DH Shu, QZ Sibley, A Siemens, X Sievers, L Sigg, D Sintes, AM Skeldon, K Smith, JR Smith, M Smith, MR Sneddon, P Spero, R Stapfer, G Strain, KA Strom, D Stuver, A Summerscales, T Sumner, MC Sutton, PJ Sylvestre, J Takamori, A Tanner, DB Tariq, H Taylor, I Taylor, R Thorne, KS Tibbits, M Tilav, S Tinto, M Tokmakov, KV Torres, C Torrie, C Traeger, S Traylor, G Tyler, W Ugolini, D Vallisneri, M van Putten, M Vass, S Vecchio, A Vorvick, C Vyachanin, SP Wallace, L Walther, H Ward, H Ware, B Watts, K Webber, D Weidner, A Weiland, U Weinstein, A Weiss, R Welling, H Wen, L Wen, S Whelan, JT Whitcomb, SE Whiting, BF Willems, PA Williams, PR Williams, R Willke, B Wilson, A Winjum, BJ Winkler, W Wise, S Wiseman, AG Woan, G Wooley, R Worden, J Yakushin, I Yamamoto, H Yoshida, S Zawischa, I Zhang, L Zotov, N Zucker, M Zweizig, J CA LIGO Sci Collaboration TI Analysis of first LIGO science data for stochastic gravitational waves SO PHYSICAL REVIEW D LA English DT Article ID UPPER LIMIT; DETECTOR; INTERFEROMETER; RADIATION; LASER AB We present the analysis of between 50 and 100 h of coincident interferometric strain data used to search for and establish an upper limit on a stochastic background of gravitational radiation. These data come from the first LIGO science run, during which all three LIGO interferometers were operated over a 2-week period spanning August and September of 2002. The method of cross correlating the outputs of two interferometers is used for analysis. We describe in detail practical signal processing issues that arise when working with real data, and we establish an observational upper limit on a f(-3) power spectrum of gravitational waves. Our 90% confidence limit is Omega(0)h(100)(2)less than or equal to23+/-4.6 in the frequency band 40-314 Hz, where h(100) is the Hubble constant in units of 100 km/sec/Mpc and Omega(0) is the gravitational wave energy density per logarithmic frequency interval in units of the closure density. This limit is approximately 10(4) times better than the previous, broadband direct limit using interferometric detectors, and nearly 3 times better than the best narrow-band bar detector limit. As LIGO and other worldwide detectors improve in sensitivity and attain their design goals, the analysis procedures described here should lead to stochastic background sensitivity levels of astrophysical interest. C1 CALTECH, LIGO, Pasadena, CA 91125 USA. Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, Germany. Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany. Australian Natl Univ, Canberra, ACT 0200, Australia. Calif State Univ Dominguez Hills, Carson, CA 90747 USA. CALTECH, CaRT, Pasadena, CA 91125 USA. Cardiff Univ, Cardiff CF2 3YB, S Glam, Wales. Carleton Coll, Northfield, MN 55057 USA. Cornell Univ, Ithaca, NY 14853 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Hobart & William Smith Coll, Geneva, NY 14456 USA. InterUniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India. MIT, LIGO, Cambridge, MA 02139 USA. LIGO Hanford Observ, Richland, WA 99352 USA. LIGO Livingston Observ, Livingston, LA 70754 USA. Louisiana State Univ, Baton Rouge, LA 70803 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Loyola Univ, New Orleans, LA 70118 USA. Max Planck Inst Quantum Opt, D-85748 Garching, Germany. Moscow MV Lomonosov State Univ, Moscow 119992, Russia. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Natl Astron Observ Japan, Tokyo 1818588, Japan. Northwestern Univ, Evanston, IL 60208 USA. Salish Kootenai Coll, Pablo, MT 59855 USA. SE Louisiana Univ, Hammond, LA 70402 USA. Stanford Univ, Stanford, CA 94305 USA. Syracuse Univ, Syracuse, NY 13244 USA. Penn State Univ, University Pk, PA 16802 USA. Univ Texas, Brownsville, TX 78520 USA. Texas Southmost Coll, Brownsville, TX 78520 USA. Trinity Univ, San Antonio, TX 78212 USA. Leibniz Univ Hannover, D-30167 Hannover, Germany. Univ Illes Balears, E-07071 Palma de Mallorca, Spain. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Univ Florida, Gainesville, FL 32611 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Michigan, Ann Arbor, MI 48109 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Wisconsin, Milwaukee, WI 53201 USA. Washington State Univ, Pullman, WA 99164 USA. HP Labs, Palo Alto, CA USA. CNRS, Inst Astrophys Paris, GReCO, F-75700 Paris, France. Univ Tokyo, Inst Cosm Ray Res, Tokyo, Japan. Univ Coll Dublin, Dublin 2, Ireland. RP CALTECH, LIGO, Pasadena, CA 91125 USA. RI Pitkin, Matthew/I-3802-2013; Vyatchanin, Sergey/J-2238-2012; Chen, Yanbei/A-2604-2013; Bilenko, Igor/D-5172-2012; Sylvestre, Julien/A-8610-2009; Casey, Morag/C-9703-2010; Raab, Frederick/E-2222-2011; Rowan, Sheila/E-3032-2010; Lueck, Harald/F-7100-2011; Freise, Andreas/F-8892-2011; Kawabe, Keita/G-9840-2011; Ottewill, Adrian/A-1838-2016; Frey, Raymond/E-2830-2016; Beausoleil, Raymond/C-5076-2009; McClelland, David/E-6765-2010; Schutz, Bernard/B-1504-2010; Strain, Kenneth/D-5236-2011; Mitrofanov, Valery/D-8501-2012; Allen, Bruce/K-2327-2012; Barker, David/A-5671-2013; Liu, Sheng/K-2815-2013; van Putten, Maurice/F-5237-2011; Vecchio, Alberto/F-8310-2015; Finn, Lee Samuel/A-3452-2009; Ottaway, David/J-5908-2015; Sigg, Daniel/I-4308-2015; OI Pitkin, Matthew/0000-0003-4548-526X; Sylvestre, Julien/0000-0001-8136-4348; Lueck, Harald/0000-0001-9350-4846; Ottewill, Adrian/0000-0003-3293-8450; Frey, Raymond/0000-0003-0341-2636; McClelland, David/0000-0001-6210-5842; Strain, Kenneth/0000-0002-2066-5355; Allen, Bruce/0000-0003-4285-6256; Vecchio, Alberto/0000-0002-6254-1617; Finn, Lee Samuel/0000-0002-3937-0688; Sigg, Daniel/0000-0003-4606-6526; Whelan, John/0000-0001-5710-6576; Stuver, Amber/0000-0003-0324-5735; O'Shaughnessy, Richard/0000-0001-5832-8517; Taylor, Ian/0000-0001-5040-0772; Zweizig, John/0000-0002-1521-3397; Aulbert, Carsten/0000-0002-1481-8319; Heurs, Michele/0000-0002-5577-2273; Freise, Andreas/0000-0001-6586-9901; Tokmakov, Kirill/0000-0002-2808-6593; Whiting, Bernard F/0000-0002-8501-8669; Papa, M.Alessandra/0000-0002-1007-5298 NR 41 TC 163 Z9 163 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 12 AR 122004 DI 10.1103/PhysRevD.69.122004 PG 24 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 838AA UT WOS:000222681600005 ER PT J AU Abbott, B Abbott, R Adhikari, R Ageev, A Allen, B Amin, R Anderson, SB Anderson, WG Araya, M Armandula, H Asiri, F Aufmuth, P Aulbert, C Babak, S Balasubramanian, R Ballmer, S Barish, BC Barker, D Barker-Patton, C Barnes, M Barr, B Barton, MA Bayer, K Beausoleil, R Belczynski, K Bennett, R Berukoff, SJ Betzwieser, J Bhawal, B Bilenko, IA Billingsley, G Black, E Blackburn, K Bland-Weaver, B Bochner, B Bogue, L Bork, R Bose, S Brady, PR Braginsky, VB Brau, JE Brown, DA Brozek, S Bullington, A Buonanno, A Burgess, R Busby, D Butler, WE Byer, RL Cadonati, L Cagnoli, G Camp, JB Cantley, CA Cardenas, L Carter, K Casey, MM Castiglione, J Chandler, A Chapsky, J Charlton, P Chatterji, S Chen, Y Chickarmane, V Chin, D Christensen, N Churches, D Colacino, C Coldwell, R Coles, M Cook, D Corbitt, T Coyne, D Creighton, JDE Creighton, TD Crooks, DRM Csatorday, P Cusack, BJ Cutler, C D'Ambrosio, E Danzmann, K Davies, R Daw, E DeBra, D Delker, T DeSalvo, R Dhurandhar, S Diaz, M Ding, H Drever, RWP Dupuis, RJ Ebeling, C Edlund, J Ehrens, P Elliffe, EJ Etzel, T Evans, M Evans, T Fallnich, C Farnham, D Fejer, MM Fine, M Finn, LS Flanagan, E Freise, A Frey, R Fritschel, P Frolov, V Fyffe, M Ganezer, KS Giaime, JA Gillespie, A Goda, K Gonzalez, G Gossler, S Grandclement, P Grant, A Gray, C Gretarsson, AM Grimmett, D Grote, H Grunewald, S Guenther, M Gustafson, E Gustafson, R Hamilton, WO Hammond, M Hanson, J Hardham, C Harry, G Hartunian, A Heefner, J Hefetz, Y Heinzel, G Heng, IS Hennessy, M Hepler, N Heptonstall, A Heurs, M Hewitson, M Hindman, N Hoang, P Hough, J Hrynevych, M Hua, W Ingley, R Ito, M Itoh, Y Ivanov, A Jennrich, O Johnson, WW Johnston, W Jones, L Jungwirth, D Kalogera, V Katsavounidis, E Kawabe, K Kawamura, S Kells, W Kern, J Khan, A Killbourn, S Killow, CJ Kim, C King, C King, P Klimenko, S Kloevekorn, P Koranda, S Kotter, K Kovalik, J Kozak, D Krishnan, B Landry, M Langdale, J Lantz, B Lawrence, R Lazzarini, A Lei, M Leonhardt, V Leonor, I Libbrecht, K Lindquist, P Liu, S Logan, J Lormand, M Lubinski, M Luck, H Lyons, TT Machenschalk, B MacInnis, M Mageswaran, M Mailand, K Majid, W Malec, M Mann, F Marin, A Marka, S Maros, E Mason, J Mason, K Matherny, O Matone, L Mavalvala, N McCarthy, R McClelland, DE McHugh, M McNamara, P Mendell, G Meshkov, S Messenger, C Mitrofanov, VP Mitselmakher, G Mittleman, R Miyakawa, O Miyoki, S Mohanty, S Moreno, G Mossavi, K Mours, B Mueller, G Mukherjee, S Myers, J Nagano, S Nash, T Naundorf, H Nayak, R Newton, G Nocera, F Nutzman, P Olson, T O'Reilly, B Ottaway, DJ Ottewill, A Ouimette, D Overmier, H Owen, BJ Papa, MA Parameswariah, C Parameswariah, V Pedraza, M Penn, S Pitkin, M Plissi, M Pratt, M Quetschke, V Raab, F Radkins, H Rahkola, R Rakhmanov, M Rao, SR Redding, D Regehr, MW Regimbau, T Reilly, KT Reithmaier, K Reitze, DH Richman, S Riesen, R Riles, K Rizzi, A Robertson, DI Robertson, NA Robison, L Roddy, S Rollins, J Romano, JD Romie, J Rong, H Rose, D Rotthoff, E Rowan, S Rudiger, A Russell, P Ryan, K Salzman, I Sanders, GH Sannibale, V Sathyaprakash, B Saulson, PR Savage, R Sazonov, A Schilling, R Schlaufman, K Schmidt, V Schofield, R Schrempel, M Schutz, BF Schwinberg, P Scott, SM Searle, AC Sears, B Seel, S Sengupta, AS Shapiro, CA Shawhan, P Shoemaker, DH Shu, QZ Sibley, A Siemens, X Sievers, L Sigg, D Sintes, AM Skeldon, K Smith, JR Smith, M Smith, MR Sneddon, P Spero, R Stapfer, G Strain, KA Strom, D Stuver, A Summerscales, T Sumner, MC Sutton, PJ Sylvestre, J Takamori, A Tanner, DB Tariq, H Taylor, I Taylor, R Thorne, KS Tibbits, M Tilav, S Tinto, M Tokmakov, KV Torres, C Torrie, C Traeger, S Traylor, G Tyler, W Ugolini, D Vallisneri, M van Putten, M Vass, S Vecchio, A Vorvick, C Vyachanin, SP Wallace, L Walther, H Ward, H Ware, B Watts, K Webber, D Weidner, A Weiland, U Weinstein, A Weiss, R Welling, H Wen, L Wen, S Whelan, JT Whitcomb, SE Whiting, BF Willems, PA Williams, PR Williams, R Willke, B Wilson, A Winjum, BJ Winkler, W Wise, S Wiseman, AG Woan, G Wooley, R Worden, J Yakushin, I Yamamoto, H Yoshida, S Zawischa, I Zhang, L Zotov, N Zucker, M Zweizig, J AF Abbott, B Abbott, R Adhikari, R Ageev, A Allen, B Amin, R Anderson, SB Anderson, WG Araya, M Armandula, H Asiri, F Aufmuth, P Aulbert, C Babak, S Balasubramanian, R Ballmer, S Barish, BC Barker, D Barker-Patton, C Barnes, M Barr, B Barton, MA Bayer, K Beausoleil, R Belczynski, K Bennett, R Berukoff, SJ Betzwieser, J Bhawal, B Bilenko, IA Billingsley, G Black, E Blackburn, K Bland-Weaver, B Bochner, B Bogue, L Bork, R Bose, S Brady, PR Braginsky, VB Brau, JE Brown, DA Brozek, S Bullington, A Buonanno, A Burgess, R Busby, D Butler, WE Byer, RL Cadonati, L Cagnoli, G Camp, JB Cantley, CA Cardenas, L Carter, K Casey, MM Castiglione, J Chandler, A Chapsky, J Charlton, P Chatterji, S Chen, Y Chickarmane, V Chin, D Christensen, N Churches, D Colacino, C Coldwell, R Coles, M Cook, D Corbitt, T Coyne, D Creighton, JDE Creighton, TD Crooks, DRM Csatorday, P Cusack, BJ Cutler, C D'Ambrosio, E Danzmann, K Davies, R Daw, E DeBra, D Delker, T DeSalvo, R Dhurandhar, S Diaz, M Ding, H Drever, RWP Dupuis, RJ Ebeling, C Edlund, J Ehrens, P Elliffe, EJ Etzel, T Evans, M Evans, T Fallnich, C Farnham, D Fejer, MM Fine, M Finn, LS Flanagan, E Freise, A Frey, R Fritschel, P Frolov, V Fyffe, M Ganezer, KS Giaime, JA Gillespie, A Goda, K Gonzalez, G Gossler, S Grandclement, P Grant, A Gray, C Gretarsson, AM Grimmett, D Grote, H Grunewald, S Guenther, M Gustafson, E Gustafson, R Hamilton, WO Hammond, M Hanson, J Hardham, C Harry, G Hartunian, A Heefner, J Hefetz, Y Heinzel, G Heng, IS Hennessy, M Hepler, N Heptonstall, A Heurs, M Hewitson, M Hindman, N Hoang, P Hough, J Hrynevych, M Hua, W Ingley, R Ito, M Itoh, Y Ivanov, A Jennrich, O Johnson, WW Johnston, W Jones, L Jungwirth, D Kalogera, V Katsavounidis, E Kawabe, K Kawamura, S Kells, W Kern, J Khan, A Killbourn, S Killow, CJ Kim, C King, C King, P Klimenko, S Kloevekorn, P Koranda, S Kotter, K Kovalik, J Kozak, D Krishnan, B Landry, M Langdale, J Lantz, B Lawrence, R Lazzarini, A Lei, M Leonhardt, V Leonor, I Libbrecht, K Lindquist, P Liu, S Logan, J Lormand, M Lubinski, M Luck, H Lyons, TT Machenschalk, B MacInnis, M Mageswaran, M Mailand, K Majid, W Malec, M Mann, F Marin, A Marka, S Maros, E Mason, J Mason, K Matherny, O Matone, L Mavalvala, N McCarthy, R McClelland, DE McHugh, M McNamara, P Mendell, G Meshkov, S Messenger, C Mitrofanov, VP Mitselmakher, G Mittleman, R Miyakawa, O Miyoki, S Mohanty, S Moreno, G Mossavi, K Mours, B Mueller, G Mukherjee, S Myers, J Nagano, S Nash, T Naundorf, H Nayak, R Newton, G Nocera, F Nutzman, P Olson, T O'Reilly, B Ottaway, DJ Ottewill, A Ouimette, D Overmier, H Owen, BJ Papa, MA Parameswariah, C Parameswariah, V Pedraza, M Penn, S Pitkin, M Plissi, M Pratt, M Quetschke, V Raab, F Radkins, H Rahkola, R Rakhmanov, M Rao, SR Redding, D Regehr, MW Regimbau, T Reilly, KT Reithmaier, K Reitze, DH Richman, S Riesen, R Riles, K Rizzi, A Robertson, DI Robertson, NA Robison, L Roddy, S Rollins, J Romano, JD Romie, J Rong, H Rose, D Rotthoff, E Rowan, S Rudiger, A Russell, P Ryan, K Salzman, I Sanders, GH Sannibale, V Sathyaprakash, B Saulson, PR Savage, R Sazonov, A Schilling, R Schlaufman, K Schmidt, V Schofield, R Schrempel, M Schutz, BF Schwinberg, P Scott, SM Searle, AC Sears, B Seel, S Sengupta, AS Shapiro, CA Shawhan, P Shoemaker, DH Shu, QZ Sibley, A Siemens, X Sievers, L Sigg, D Sintes, AM Skeldon, K Smith, JR Smith, M Smith, MR Sneddon, P Spero, R Stapfer, G Strain, KA Strom, D Stuver, A Summerscales, T Sumner, MC Sutton, PJ Sylvestre, J Takamori, A Tanner, DB Tariq, H Taylor, I Taylor, R Thorne, KS Tibbits, M Tilav, S Tinto, M Tokmakov, KV Torres, C Torrie, C Traeger, S Traylor, G Tyler, W Ugolini, D Vallisneri, M van Putten, M Vass, S Vecchio, A Vorvick, C Vyachanin, SP Wallace, L Walther, H Ward, H Ware, B Watts, K Webber, D Weidner, A Weiland, U Weinstein, A Weiss, R Welling, H Wen, L Wen, S Whelan, JT Whitcomb, SE Whiting, BF Willems, PA Williams, PR Williams, R Willke, B Wilson, A Winjum, BJ Winkler, W Wise, S Wiseman, AG Woan, G Wooley, R Worden, J Yakushin, I Yamamoto, H Yoshida, S Zawischa, I Zhang, L Zotov, N Zucker, M Zweizig, J CA LIGO Sci Collaboration TI Analysis of LIGO data for gravitational waves from binary neutron stars SO PHYSICAL REVIEW D LA English DT Article ID INSPIRALING COMPACT BINARIES; RELATIVISTIC GRAVITY; COALESCENCE RATES; SEARCH TEMPLATES; DETECTORS; PULSAR; INTERFEROMETER; SYSTEMS; FORMS; LASER AB We report on a search for gravitational waves from coalescing compact binary systems in the Milky Way and the Magellanic Clouds. The analysis uses data taken by two of the three LIGO interferometers during the first LIGO science run and illustrates a method of setting upper limits on inspiral event rates using interferometer data. The analysis pipeline is described with particular attention to data selection and coincidence between the two interferometers. We establish an observational upper limit of R<1.7x10(2) per year per Milky Way Equivalent Galaxy (MWEG), with 90% confidence, on the coalescence rate of binary systems in which each component has a mass in the range 1-3 M. C1 CALTECH, LIGO, Pasadena, CA 91125 USA. Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-14476 Golm, Germany. Max Planck Inst Gravitat Phys, Albert Einstein Inst, D-30167 Hannover, Germany. Australian Natl Univ, Canberra, ACT 0200, Australia. Calif State Univ Dominguez Hills, Carson, CA 90747 USA. CALTECH, CaRT, Pasadena, CA 91125 USA. Cardiff Univ, Cardiff CF2 3YB, S Glam, Wales. Carleton Coll, Northfield, MN 55057 USA. Cornell Univ, Ithaca, NY 14853 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Hobart & William Smith Coll, Geneva, NY 14456 USA. InterUniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India. MIT, LIGO, Cambridge, MA 02139 USA. LIGO Hanford Observ, Richland, WA 99352 USA. LIGO Livingston Observ, Livingston, LA 70754 USA. Louisiana State Univ, Baton Rouge, LA 70803 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Loyola Univ, New Orleans, LA 70118 USA. Max Planck Inst Quantum Opt, D-85748 Garching, Germany. Moscow MV Lomonosov State Univ, Moscow 119992, Russia. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Natl Astron Observ Japan, Tokyo 1818588, Japan. Northwestern Univ, Evanston, IL 60208 USA. Salish Kootenai Coll, Pablo, MT 59855 USA. SE Louisiana Univ, Hammond, LA 70402 USA. Stanford Univ, Stanford, CA 94305 USA. Syracuse Univ, Syracuse, NY 13244 USA. Penn State Univ, University Pk, PA 16802 USA. Univ Texas, Brownsville, TX 78520 USA. Texas Southmost Coll, Brownsville, TX 78520 USA. Trinity Univ, San Antonio, TX 78212 USA. Leibniz Univ Hannover, D-30167 Hannover, Germany. Univ Illes Balears, E-07071 Palma de Mallorca, Spain. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Univ Florida, Gainesville, FL 32611 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Michigan, Ann Arbor, MI 48109 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Wisconsin, Milwaukee, WI 53201 USA. Washington State Univ, Pullman, WA 99164 USA. HP Labs, Palo Alto, CA USA. CNRS, Inst Astrophys Paris, GReCO, F-75700 Paris, France. Univ Tokyo, Inst Cosm Ray Res, Tokyo, Japan. Univ Coll Dublin, Dublin 2, Ireland. NASA, Jet Prop Lab, Pasadena, CA USA. RP CALTECH, LIGO, Pasadena, CA 91125 USA. RI Sylvestre, Julien/A-8610-2009; Beausoleil, Raymond/C-5076-2009; McClelland, David/E-6765-2010; Schutz, Bernard/B-1504-2010; Casey, Morag/C-9703-2010; Rowan, Sheila/E-3032-2010; Strain, Kenneth/D-5236-2011; Raab, Frederick/E-2222-2011; Lueck, Harald/F-7100-2011; Freise, Andreas/F-8892-2011; Kawabe, Keita/G-9840-2011; Bilenko, Igor/D-5172-2012; Mitrofanov, Valery/D-8501-2012; van Putten, Maurice/F-5237-2011; Pitkin, Matthew/I-3802-2013; Allen, Bruce/K-2327-2012; Vyatchanin, Sergey/J-2238-2012; Chen, Yanbei/A-2604-2013; Barker, David/A-5671-2013; Liu, Sheng/K-2815-2013; Vecchio, Alberto/F-8310-2015; Finn, Lee Samuel/A-3452-2009; Ottaway, David/J-5908-2015; Ottewill, Adrian/A-1838-2016; Sigg, Daniel/I-4308-2015; Frey, Raymond/E-2830-2016; OI Sylvestre, Julien/0000-0001-8136-4348; McClelland, David/0000-0001-6210-5842; Strain, Kenneth/0000-0002-2066-5355; Lueck, Harald/0000-0001-9350-4846; Pitkin, Matthew/0000-0003-4548-526X; Allen, Bruce/0000-0003-4285-6256; Vecchio, Alberto/0000-0002-6254-1617; Finn, Lee Samuel/0000-0002-3937-0688; Ottewill, Adrian/0000-0003-3293-8450; Sigg, Daniel/0000-0003-4606-6526; Frey, Raymond/0000-0003-0341-2636; Taylor, Ian/0000-0001-5040-0772; Aulbert, Carsten/0000-0002-1481-8319; Tanner, David/0000-0003-1940-4710; Freise, Andreas/0000-0001-6586-9901; Whiting, Bernard F/0000-0002-8501-8669; Papa, M.Alessandra/0000-0002-1007-5298 NR 60 TC 159 Z9 159 U1 5 U2 25 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 12 AR 122001 DI 10.1103/PhysRevD.69.122001 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 838AA UT WOS:000222681600002 ER PT J AU Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aso, T Aushev, T Bakich, AM Ban, Y Banas, E Banerjee, S Bay, A Bedny, I Behera, PK Bizjak, I Blyth, S Bondar, A Bracko, M Brodzicka, J Browder, TE Casey, BCK Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, SK Choi, Y Choi, YK Danilov, M Dong, LY Drutskoy, A Eidelman, S Eiges, V Enari, Y Fukunaga, C Gabyshev, N Garmash, A Gershon, T Golob, B Guo, R Hagner, C Handa, F Hara, T Hayashii, H Hazumi, M Higuchi, T Hinz, L Hokuue, T Hoshi, Y Hou, WS Hsiung, YB Huang, HC Igarashi, Y Iijima, T Inami, K Ishikawa, A Itoh, R Iwasaki, H Iwasaki, M Iwasaki, Y Jang, HK Kang, JH Kang, JS Katayama, N Kawasaki, T Kichimi, H Kim, HJ Kim, H Kim, JH Kim, SK Kinoshita, K Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Lange, JS Leder, G Lee, SH Lesiak, T Li, J Limosani, A Lin, SW Liventsev, D MacNaughton, J Mandl, F Matsumoto, T Matyja, A Mitaroff, W Miyake, H Miyata, H Mohapatra, D Mori, T Nagamine, T Nagasaka, Y Nakadaira, T Nakano, E Nakao, M Nakazawa, H Nam, JW Natkaniec, Z Nishida, S Nitoh, O Nozaki, T Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Pakhlov, P Palka, H Park, CW Park, H Park, KS Parslow, N Peak, LS Perroud, JP Piilonen, LE Root, N Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Satapathy, M Satpathy, A Schneider, O Schwanda, C Semenov, S Senyo, K Sevior, ME Shwartz, B Singh, JB Soni, N Stanic, S Staric, M Sugi, A Sugiyama, A Sumisawa, K Sumiyoshi, T Suzuki, S Takahashi, T Takasaki, F Tamai, K Tamura, N Tanaka, J Tanaka, M Teramoto, Y Tomura, T Trabelsi, K Tsuboyama, T Tsukamoto, T Uehara, S Ueno, K Uno, S Ushiroda, Y Varner, G Varvell, KE Wang, CC Wang, CH Wang, JG Watanabe, M Watanabe, Y Won, E Yabsley, BD Yamada, Y Yamaguchi, A Yamashita, Y Yamauchi, M Yanai, H Yuan, Y Yusa, Y Zhang, CC Zhang, J Zhang, ZP Zheng, Y Zhilich, V Zontar, D AF Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aso, T Aushev, T Bakich, AM Ban, Y Banas, E Banerjee, S Bay, A Bedny, I Behera, PK Bizjak, I Blyth, S Bondar, A Bracko, M Brodzicka, J Browder, TE Casey, BCK Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, SK Choi, Y Choi, YK Danilov, M Dong, LY Drutskoy, A Eidelman, S Eiges, V Enari, Y Fukunaga, C Gabyshev, N Garmash, A Gershon, T Golob, B Guo, R Hagner, C Handa, F Hara, T Hayashii, H Hazumi, M Higuchi, T Hinz, L Hokuue, T Hoshi, Y Hou, WS Hsiung, YB Huang, HC Igarashi, Y Iijima, T Inami, K Ishikawa, A Itoh, R Iwasaki, H Iwasaki, M Iwasaki, Y Jang, HK Kang, JH Kang, JS Katayama, N Kawasaki, T Kichimi, H Kim, HJ Kim, H Kim, JH Kim, SK Kinoshita, K Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Lange, JS Leder, G Lee, SH Lesiak, T Li, J Limosani, A Lin, SW Liventsev, D MacNaughton, J Mandl, F Matsumoto, T Matyja, A Mitaroff, W Miyake, H Miyata, H Mohapatra, D Mori, T Nagamine, T Nagasaka, Y Nakadaira, T Nakano, E Nakao, M Nakazawa, H Nam, JW Natkaniec, Z Nishida, S Nitoh, O Nozaki, T Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Pakhlov, P Palka, H Park, CW Park, H Park, KS Parslow, N Peak, LS Perroud, JP Piilonen, LE Root, N Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Satapathy, M Satpathy, A Schneider, O Schwanda, C Semenov, S Senyo, K Sevior, ME Shwartz, B Singh, JB Soni, N Stanic, S Staric, M Sugi, A Sugiyama, A Sumisawa, K Sumiyoshi, T Suzuki, S Takahashi, T Takasaki, F Tamai, K Tamura, N Tanaka, J Tanaka, M Teramoto, Y Tomura, T Trabelsi, K Tsuboyama, T Tsukamoto, T Uehara, S Ueno, K Uno, S Ushiroda, Y Varner, G Varvell, KE Wang, CC Wang, CH Wang, JG Watanabe, M Watanabe, Y Won, E Yabsley, BD Yamada, Y Yamaguchi, A Yamashita, Y Yamauchi, M Yanai, H Yuan, Y Yusa, Y Zhang, CC Zhang, J Zhang, ZP Zheng, Y Zhilich, V Zontar, D CA Belle Collaboration TI Study of B(-)-> D(**0)pi(-)(D(**0)-> D((*)+)pi(-)) decays SO PHYSICAL REVIEW D LA English DT Article ID EXCITED CHARMED MESONS; SEMILEPTONIC B-DECAYS; P-WAVE; E+E ANNIHILATION; HEAVY-QUARK AB We report the results of a study of charged B decays to the D(+/-)pi(-/+)pi(-/+) and D(*+/-)pi(-/+)pi(-/+) final states using complete D((*)) reconstruction. The contributions of two-body B-->D**pi decays with narrow (j=3/2) and broad (j=1/2) D** states have been determined and the masses and widths of four D** states have been measured. This is the first observation of the broad P-wave D(0)*(0) and D'(0)(1) mesons. The analysis is based on a data sample of 65 million B(B) over bar pairs collected in the Belle experiment. C1 High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Frankfurt, D-6000 Frankfurt, Germany. Gyeongsang Natl Univ, Chinju, South Korea. Univ Hawaii, Honolulu, HI 96822 USA. Hiroshima Inst Technol, Hiroshima, Japan. Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China. Inst High Energy Phys, Vienna, Austria. Inst Theoret & Expt Phys, Moscow 117259, Russia. Jozef Stefan Inst, Ljubljana, Slovenia. Kanagawa Univ, Yokohama, Kanagawa, Japan. Korea Univ, Seoul 136701, South Korea. Kyungpook Natl Univ, Taegu 702701, South Korea. Univ Lausanne, Inst Phys Hautes Energies, Lausanne, Switzerland. Univ Ljubljana, Ljubljana, Slovenia. Univ Maribor, SLO-2000 Maribor, Slovenia. Univ Melbourne, Melbourne, Vic, Australia. Nagoya Univ, Nagoya, Aichi, Japan. Nara Womens Univ, Nara 630, Japan. Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan. Natl Lien Ho Inst Technol, Miaoli, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei, Taiwan. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Nihon Dent Coll, Niigata, Japan. Niigata Univ, Niigata, Japan. Osaka City Univ, Osaka 558, Japan. Osaka Univ, Osaka, Japan. Panjab Univ, Chandigarh 160014, India. Peking Univ, Beijing 100871, Peoples R China. Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA. Saga Univ, Saga 840, Japan. Univ Sci & Technol China, Hefei 230026, Peoples R China. Seoul Natl Univ, Seoul, South Korea. Sungkyunkwan Univ, Suwon, South Korea. Univ Sydney, Sydney, NSW 2006, Australia. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Toho Univ, Funabashi, Chiba 274, Japan. Tohoku Gakuin Univ, Tagajo, Miyagi, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Inst Technol, Tokyo 152, Japan. Tokyo Metropolitan Univ, Tokyo 158, Japan. Tokyo Univ Agr & Technol, Tokyo, Japan. Toyama Natl Coll Maritime Technol, Toyama, Japan. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Utkal Univ, Bhubaneswar 751004, Orissa, India. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Yokkaichi Univ, Yokaichi, Japan. Yonsei Univ, Seoul 120749, South Korea. RP Abe, K (reprint author), High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan. RI Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Huang, Hsuan-Cheng/C-7266-2011; Nitoh, Osamu/C-3522-2013; Kim, Sun Kee/G-2042-2015; Pakhlov, Pavel/K-2158-2013; Danilov, Mikhail/C-5380-2014; Krokovny, Pavel/G-4421-2016; Chistov, Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016 OI Aihara, Hiroaki/0000-0002-1907-5964; Huang, Hsuan-Cheng/0000-0002-3386-0934; Kim, Sun Kee/0000-0002-0013-0775; Pakhlov, Pavel/0000-0001-7426-4824; Danilov, Mikhail/0000-0001-9227-5164; Krokovny, Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390; Drutskoy, Alexey/0000-0003-4524-0422 NR 31 TC 207 Z9 208 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1550-7998 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 112002 DI 10.1103/PhysRevD.69.112002 PG 17 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900008 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Shelkov, VG Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, VE Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Foulkes, SD Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Smith, JG Zhang, J Zhang, L Chen, A Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, QL Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Muller-Pfefferkorn, R Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Spaan, B Sundermann, JE Bernard, D Bonneaud, GR Brochard, F Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Lavin, D Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Charles, MJ Grenier, GJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Di Lodovico, F Mohanty, GB Brown, CL Cowan, G Flack, RL Flaecher, HU Green, MG Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Lafferty, GD Lyon, AJ Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Wilden, L Jessop, CP LoSecco, JM Gabriel, TA Allmendinger, T Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Pivk, M Roos, L T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Anulli, F Biasini, M Peruzzi, IM Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Miftakov, V Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M De Nardo, G Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Rubin, AE Sekula, SJ Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Shelkov, VG Wenzel, WA Barrett, M Ford, KE Harrison, TJ Hart, AJ Hawkes, CM Morgan, SE Watson, AT Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Cuhadar-Donszelmann, T Hearty, C Knecht, NS Mattison, TS McKenna, JA Thiessen, D Khan, A Kyberd, P Teodorescu, L Blinov, VE Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Foulkes, SD Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Smith, JG Zhang, J Zhang, L Chen, A Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, QL Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Muller-Pfefferkorn, R Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Spaan, B Sundermann, JE Bernard, D Bonneaud, GR Brochard, F Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ Lavin, D Muheim, F Playfer, S Xie, Y Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Charles, MJ Grenier, GJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Di Lodovico, F Mohanty, GB Brown, CL Cowan, G Flack, RL Flaecher, HU Green, MG Jackson, PS McMahon, TR Ricciardi, S Salvatore, F Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Lafferty, GD Lyon, AJ Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Bulten, H Raven, G Wilden, L Jessop, CP LoSecco, JM Gabriel, TA Allmendinger, T Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Rahimi, AM Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Pivk, M Roos, L T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Anulli, F Biasini, M Peruzzi, IM Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lau, YP Lu, C Miftakov, V Olsen, J Smith, AJS Telnov, AV Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M De Nardo, G Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Fan, S Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Rubin, AE Sekula, SJ Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BABAR Collaboration TI Measurements of moments of the hadronic mass distribution in semileptonic B decays SO PHYSICAL REVIEW D LA English DT Article ID MESON DECAYS; QCD AB We report a measurement of the first four moments of the hadronic mass distribution in (B) over bar -->X(c)l(-)(v) over bar decays. The measurements are based on 89 million Y(4S)-->B(B) over bar events where the hadronic decay of one of the B mesons is fully reconstructed and a charged lepton from the decay of the other B meson is identified. The moments are presented for minimum lepton momenta ranging from 0.9 to 1.6 GeV in the B rest frame. It is expected that such measurements will lead to improved determinations of \V-cb\ and \V-ub\. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLP, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 72E, Merseyside, England. Univ London, Queen Mary, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Univ Padua, Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Univ Pavia, Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Negrini, Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; Di Lodovico, Francesca/L-9109-2016; M, Saleem/B-9137-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Della Ricca, Giuseppe/B-6826-2013; Saeed, Mohammad Alam/J-7455-2012 OI Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Della Ricca, Giuseppe/0000-0003-2831-6982; Saeed, Mohammad Alam/0000-0002-3529-9255 NR 25 TC 89 Z9 89 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 111103 DI 10.1103/PhysRevD.69.111103 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900003 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Morgan, SE Watson, AT Watson, NK Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Bernard, D Bonneaud, GR Brochard, F Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Khan, A Lavin, D Muheim, F Playfer, S Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Sarti, A Treadwell, E Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Mohanty, GB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Lafferty, GD Lyon, AJ Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cartaro, C Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Raven, G Wilden, L Jessop, CP LoSecco, JM Gabriel, TA Allmendinger, T Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Anulli, F Biasini, M Peruzzi, IM Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, F Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M De Nardo, G Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Morgan, SE Watson, AT Watson, NK Fritsch, M Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Bernard, D Bonneaud, GR Brochard, F Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Khan, A Lavin, D Muheim, F Playfer, S Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Sarti, A Treadwell, E Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Patteri, P Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Brandenburg, G Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Mohanty, GB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Lafferty, GD Lyon, AJ Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Taras, P Nicholson, H Cartaro, C Cavallo, N Fabozzi, F Gatto, C Lista, L Monorchio, D Paolucci, P Piccolo, D Sciacca, C Baak, M Raven, G Wilden, L Jessop, CP LoSecco, JM Gabriel, TA Allmendinger, T Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Anulli, F Biasini, M Peruzzi, IM Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, F Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M De Nardo, G Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wittgen, M Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Measurement of the electron energy spectrum and its moments in inclusive B -> Xe nu decays SO PHYSICAL REVIEW D LA English DT Article ID SEMILEPTONIC-B AB We report a measurement of the inclusive electron energy spectrum for semileptonic decays of B mesons in a data sample of 52 million Y(4S)-->B(B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We determine the branching fraction, first, second, and third moments of the spectrum for lower cutoffs on the electron energy between 0.6 and 1.5 GeV. We measure the partial branching fraction to be B(B-->Xenu,E-e>0.6 GeV)=[10.36+/-0.06(stat.)+/-0.23(sys.)]%. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 72E, Merseyside, England. Queen Mary Univ London, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; crosetti, nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Rotondo, Marcello/I-6043-2012; Bellini, Fabio/D-1055-2009; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Patrignani, Claudia/C-5223-2009; Kravchenko, Evgeniy/F-5457-2015; Roe, Natalie/A-8798-2012; M, Saleem/B-9137-2013; Cavallo, Nicola/F-8913-2012; Forti, Francesco/H-3035-2011; Mir, Lluisa-Maria/G-7212-2015; Grancagnolo, Sergio/J-3957-2015; Calabrese, Roberto/G-4405-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Luppi, Eleonora/A-4902-2015; Monge, Maria Roberta/G-9127-2012; Kolomensky, Yury/I-3510-2015; Negrini, Matteo/C-8906-2014; Lo Vetere, Maurizio/J-5049-2012; Martinez Vidal, F*/L-7563-2014; Morandin, Mauro/A-3308-2016; Saeed, Mohammad Alam/J-7455-2012; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Bellini, Fabio/0000-0002-2936-660X; Peters, Klaus/0000-0001-7133-0662; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Mir, Lluisa-Maria/0000-0002-4276-715X; Grancagnolo, Sergio/0000-0001-8490-8304; Calabrese, Roberto/0000-0002-1354-5400; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Luppi, Eleonora/0000-0002-1072-5633; Monge, Maria Roberta/0000-0003-1633-3195; Kolomensky, Yury/0000-0001-8496-9975; Negrini, Matteo/0000-0003-0101-6963; Lo Vetere, Maurizio/0000-0002-6520-4480; Martinez Vidal, F*/0000-0001-6841-6035; Morandin, Mauro/0000-0003-4708-4240; Saeed, Mohammad Alam/0000-0002-3529-9255; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 18 TC 116 Z9 116 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 111104 DI 10.1103/PhysRevD.69.111104 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900004 ER PT J AU Avakian, H Burkert, VD Elouadrhiri, L Bianchi, N Adams, G Afanasev, A Ambrozewicz, P Anciant, E Anghinolfi, M Armstrong, DS Asavapibhop, B Audit, G Auger, T Bagdasaryan, H Ball, JP Barrow, S Battaglieri, M Beard, K Bektasoglu, M Bellis, M Benmouna, N Biselli, AS Boiarinov, S Bonner, BE Bouchigny, S Bradford, R Branford, D Brooks, WK Butuceanu, C Calarco, JR Carman, DS Carnahan, B Cetina, C Ciciani, L Cole, PL Coleman, A Cords, D Corvisiero, P Crabb, D Crannell, H Cummings, JP DeSanctis, E DeVita, R Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Doughty, D Dragovitsch, P Dugger, M Dytman, S Dzyubak, OP Eckhause, M Egiyan, H Egiyan, KS Empl, A Eugenio, P Fatemi, R Feuerbach, RJ Ficenec, J Forest, TA Funsten, H Gaff, SJ Gavalian, G Gilad, S Gilfoyle, GP Giovanetti, KL Girard, P Gordon, CIO Griffioen, K Guidal, M Guillo, M Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hardie, J Heddle, D Heimberg, P Hersman, FW Hicks, K Hicks, RS Holtrop, M Hu, J Hyde-Wright, CE Ilieva, Y Ito, MM Jenkins, D Joo, K Kelley, JH Kellie, J Khandaker, M Kim, DH Kim, KY Kim, K Kim, MS Kim, W Klein, A Klein, FJ Klimenko, A Klusman, M Kossov, M Kramer, LH Kuang, Y Kubarovsky, V Kuhn, SE Lachniet, J Laget, JM Lawrence, D Livingston, K Li, J Longhi, A Lukashin, K Manak, JJ Marchand, C McAleer, S McNabb, JWC Mecking, BA Mehrabyan, S Melone, JJ Mestayer, MD Meyer, CA Mikhailov, K Minehart, R Mirazita, M Miskimen, R Morand, L Morrow, SA Muccifora, V Mueller, J Mutchler, GS Napolitano, J Nasseripour, R Nelson, SO Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Rielly, GV Opper, AK Osipenko, M Park, K Pasyuk, E Peterson, G Pivnyuk, N Pocanic, D Pogorelko, O Polli, E Pozdniakov, S Preedom, BM Price, JW Prok, Y Protopopescu, D Qin, LM Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rossi, P Rowntree, D Rubin, PD Sabatie, F Sabourov, K Salgado, C Santoro, JP Sapunenko, V Sargsyan, M Schumacher, RA Serov, VS Sharabian, YG Shaw, J Simionatto, S Skabelin, AV Smith, ES Smith, LC Sober, DI Spraker, M Stavinsky, A Stepanyan, S Stoler, P Strakovsky, II Strauch, S Taiuti, M Taylor, S Tedeschi, DJ Thoma, U Thompson, R Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Wang, K Weinstein, LB Weller, H Weygand, DP Whisnant, CS Wolin, E Wood, MH Yegneswaran, A Yun, J Zhang, B Zhao, J Zhou, Z AF Avakian, H Burkert, VD Elouadrhiri, L Bianchi, N Adams, G Afanasev, A Ambrozewicz, P Anciant, E Anghinolfi, M Armstrong, DS Asavapibhop, B Audit, G Auger, T Bagdasaryan, H Ball, JP Barrow, S Battaglieri, M Beard, K Bektasoglu, M Bellis, M Benmouna, N Biselli, AS Boiarinov, S Bonner, BE Bouchigny, S Bradford, R Branford, D Brooks, WK Butuceanu, C Calarco, JR Carman, DS Carnahan, B Cetina, C Ciciani, L Cole, PL Coleman, A Cords, D Corvisiero, P Crabb, D Crannell, H Cummings, JP DeSanctis, E DeVita, R Degtyarenko, PV Denizli, H Dennis, L Dharmawardane, KV Djalali, C Dodge, GE Doughty, D Dragovitsch, P Dugger, M Dytman, S Dzyubak, OP Eckhause, M Egiyan, H Egiyan, KS Empl, A Eugenio, P Fatemi, R Feuerbach, RJ Ficenec, J Forest, TA Funsten, H Gaff, SJ Gavalian, G Gilad, S Gilfoyle, GP Giovanetti, KL Girard, P Gordon, CIO Griffioen, K Guidal, M Guillo, M Guo, L Gyurjyan, V Hadjidakis, C Hakobyan, RS Hardie, J Heddle, D Heimberg, P Hersman, FW Hicks, K Hicks, RS Holtrop, M Hu, J Hyde-Wright, CE Ilieva, Y Ito, MM Jenkins, D Joo, K Kelley, JH Kellie, J Khandaker, M Kim, DH Kim, KY Kim, K Kim, MS Kim, W Klein, A Klein, FJ Klimenko, A Klusman, M Kossov, M Kramer, LH Kuang, Y Kubarovsky, V Kuhn, SE Lachniet, J Laget, JM Lawrence, D Livingston, K Li, J Longhi, A Lukashin, K Manak, JJ Marchand, C McAleer, S McNabb, JWC Mecking, BA Mehrabyan, S Melone, JJ Mestayer, MD Meyer, CA Mikhailov, K Minehart, R Mirazita, M Miskimen, R Morand, L Morrow, SA Muccifora, V Mueller, J Mutchler, GS Napolitano, J Nasseripour, R Nelson, SO Niccolai, S Niculescu, G Niculescu, I Niczyporuk, BB Niyazov, RA Nozar, M O'Rielly, GV Opper, AK Osipenko, M Park, K Pasyuk, E Peterson, G Pivnyuk, N Pocanic, D Pogorelko, O Polli, E Pozdniakov, S Preedom, BM Price, JW Prok, Y Protopopescu, D Qin, LM Raue, BA Riccardi, G Ricco, G Ripani, M Ritchie, BG Ronchetti, F Rossi, P Rowntree, D Rubin, PD Sabatie, F Sabourov, K Salgado, C Santoro, JP Sapunenko, V Sargsyan, M Schumacher, RA Serov, VS Sharabian, YG Shaw, J Simionatto, S Skabelin, AV Smith, ES Smith, LC Sober, DI Spraker, M Stavinsky, A Stepanyan, S Stoler, P Strakovsky, II Strauch, S Taiuti, M Taylor, S Tedeschi, DJ Thoma, U Thompson, R Todor, L Tur, C Ungaro, M Vineyard, MF Vlassov, AV Wang, K Weinstein, LB Weller, H Weygand, DP Whisnant, CS Wolin, E Wood, MH Yegneswaran, A Yun, J Zhang, B Zhao, J Zhou, Z CA CLAS Collaboration TI Measurement of beam-spin asymmetries for pi(+) electroproduction above the baryon resonance region SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; QUARK FRAGMENTATION FUNCTIONS; DRELL-YAN PROCESSES; PARTON DISTRIBUTIONS; CHIRAL-ODD; SEMIINCLUSIVE ELECTROPRODUCTION; GAUGE; PROTON; LEPTOPRODUCTION AB We report the first evidence for a nonzero beam-spin azimuthal asymmetry in the electroproduction of positive pions in the deep-inelastic kinematic region. Data for the reaction ep-->e'pi(+)X have been obtained using a polarized electron beam of 4.3 GeV with the CEBAF Large Acceptance Spectrometer at the Thomas Jefferson National Accelerator Facility. The amplitude of the sin phi modulation increases with the momentum of the pion relative to the virtual photon, z. In the range z=0.5-0.8 the average amplitude is 0.038+/-0.005+/-0.003 for a missing mass M-X>1.1 GeV and 0.037+/-0.007+/-0.004 for M-X>1.4 GeV. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Arizona State Univ, Tempe, AZ 85287 USA. CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Catholic Univ Amer, Washington, DC 20064 USA. Christopher Newport Univ, Newport News, VA 23606 USA. Univ Connecticut, Storrs, CT 06269 USA. Duke Univ, Durham, NC 27708 USA. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Florida Int Univ, Miami, FL 33199 USA. Florida State Univ, Tallahassee, FL 32306 USA. George Washington Univ, Washington, DC 20052 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy. Inst Phys Nucl Orsay, Orsay, France. Univ Bonn, Inst Strahlen & Kernphys, D-5300 Bonn, Germany. Inst Theoret & Expt Phys, Moscow 117259, Russia. James Madison Univ, Harrisonburg, VA 22807 USA. Kyungpook Natl Univ, Taegu 702701, South Korea. MIT, Cambridge, MA 02139 USA. Univ Massachusetts, Amherst, MA 01003 USA. Univ New Hampshire, Durham, NH 03824 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Ohio Univ, Athens, OH 45701 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Univ Roma III, I-00146 Rome, Italy. Rensselaer Polytech Inst, Troy, NY 12180 USA. Rice Univ, Houston, TX 77005 USA. Univ Richmond, Richmond, VA 23173 USA. Univ S Carolina, Columbia, SC 29208 USA. Univ Texas, El Paso, TX 79968 USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Univ Virginia, Charlottesville, VA 22901 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. RP Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RI Bektasoglu, Mehmet/A-2074-2012; Protopopescu, Dan/D-5645-2012; riccardi, gabriele/A-9269-2012; Brooks, William/C-8636-2013; Schumacher, Reinhard/K-6455-2013; Auger, Thierry/L-1073-2013; Meyer, Curtis/L-3488-2014; Sabatie, Franck/K-9066-2015 OI Brooks, William/0000-0001-6161-3570; Schumacher, Reinhard/0000-0002-3860-1827; Meyer, Curtis/0000-0001-7599-3973; Sabatie, Franck/0000-0001-7031-3975 NR 47 TC 107 Z9 107 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 112004 DI 10.1103/PhysRevD.69.112004 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900010 ER PT J AU Burdman, G Nomura, Y AF Burdman, G Nomura, Y TI Holographic theories of electroweak symmetry breaking without a Higgs boson SO PHYSICAL REVIEW D LA English DT Article ID WARPED EXTRA DIMENSIONS; RADIATIVE-CORRECTIONS; PARAMETER-S; MODEL; MILLIMETER; HYPERCOLOR; HIERARCHY; UNITARITY; VIOLATION; ORBIFOLDS AB Recently, realistic theories of electroweak symmetry breaking have been constructed in which the electroweak symmetry is broken by boundary conditions imposed at a boundary of higher dimensional spacetime. These theories have equivalent 4D dual descriptions, in which the electroweak symmetry is dynamically broken by nontrivial infrared dynamics of some gauge interaction, whose gauge coupling (g) over tilde and size N satisfy (g) over tilde (2)Ngreater than or similar to16pi(2). Such theories allow one to calculate electroweak radiative corrections, including the oblique parameters S, T and U, as long as (g) over tilde N-2/16pi(2) and N are sufficiently larger than unity. We study how the duality between the 4D and 5D theories manifests itself in the computation of various physical quantities. In particular, we calculate the electroweak oblique parameters in a warped 5D theory where the electroweak symmetry is broken by boundary conditions at the infrared brane. We show that the value of S obtained in the minimal theory exceeds the experimental bound if the theory is in a weakly coupled regime. This requires either an extension of the minimal model or departure from weak coupling. A particularly interesting scenario is obtained if the gauge couplings in the 5D theory take the largest possible values-the value suggested by naive dimensional analysis. We argue that such a theory can provide a potentially consistent picture for dynamical electroweak symmetry breaking: corrections to the electroweak observables are sufficiently small while realistic fermion masses are obtained without conflicting with bounds from flavor violation. The theory contains only the standard model quarks, leptons and gauge bosons below similar or equal to2 TeV, except for a possible light scalar associated with the radius of the extra dimension. At similar or equal to2 TeV increasingly broad string resonances appear. An analysis of top-quark phenomenology and flavor violation is also presented, which is applicable to both the weakly coupled and strongly coupled cases. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RI Burdman, Gustavo/D-3285-2012 NR 69 TC 90 Z9 90 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 115013 DI 10.1103/PhysRevD.69.115013 PG 21 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900059 ER PT J AU Dixon, L Schreiber, M AF Dixon, L Schreiber, M TI Radiative corrections to the azimuthal asymmetry in transversely polarized Moller scattering SO PHYSICAL REVIEW D LA English DT Article ID ELECTRON-ELECTRON SCATTERING; HELICITY CROSS-SECTIONS; UP-DOWN ASYMMETRY; LIGHT-LIKE LEGS; PROTON SCATTERING; Z(0) DECAYS; 3 JETS; AMPLITUDES; INTEGRALS; SPIN AB Experiment E158 at SLAC can measure an azimuthal asymmetry in single-spin, transversely polarized Moller scattering, e(-up arrow)e(-)-->e(-)e(-), which arises from a QED rescattering phase. We recompute the leading-order (one-loop) asymmetry, confirming previous results, and calculate the leading logarithmic QED corrections due to initial-state radiation from the beam and target electrons and due to final-state radiation. The size of these radiative corrections is quite sensitive to experimental details, such as the acceptance in energy and in polar angle of the scattered electron. For E158, the corrections are modest, increasing the parts-per-million asymmetry by roughly 1%. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Dixon, L (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM lance@slac.stanford.edu; mschreib@slac.stanford.edu NR 41 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 113001 DI 10.1103/PhysRevD.69.113001 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900011 ER PT J AU Dobrescu, BA Ellis, RK AF Dobrescu, BA Ellis, RK TI Analytic estimates of the QCD corrections to neutrino-nucleus scattering SO PHYSICAL REVIEW D LA English DT Article ID LEADING ORDER; CHROMODYNAMICS AB We study the QCD corrections to neutrino deep-inelastic scattering on a nucleus, and analytically estimate their size. For an isoscalar target, we show that the dominant QCD corrections to the ratio of the neutral- to charged-current events are suppressed by sin(4)theta(W), where theta(W) is the weak mixing angle. We then discuss the implications for the NuTeV determination of sin(2)theta(W). C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. NR 24 TC 22 Z9 22 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 114014 DI 10.1103/PhysRevD.69.114014 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900033 ER PT J AU Falk, AF Grossman, Y Ligeti, Z Nir, Y Petrov, AA AF Falk, AF Grossman, Y Ligeti, Z Nir, Y Petrov, AA TI D-0-(D)over-bar(0) mass difference from a dispersion relation SO PHYSICAL REVIEW D LA English DT Article ID EFFECTIVE-FIELD-THEORY; D-MESON SYSTEM; DECAYS; DUALITY; SEARCH; D-0 AB We study the standard model prediction for the mass difference between the two neutral D meson mass eigenstates, Deltam. We derive a dispersion relation based on heavy quark effective theory that relates Deltam to an integral of the width difference of heavy mesons, DeltaGamma, over varying values of the heavy meson mass. Modeling the m(D) dependence of certain D decay partial widths, we investigate the effects of SU(3) breaking from phase space on the mass difference. We find that Deltam may be comparable in magnitude to DeltaGamma in the standard model. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA. Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA. RP Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. RI Petrov, Alexey/F-2882-2010 NR 32 TC 110 Z9 112 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 114021 DI 10.1103/PhysRevD.69.114021 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900040 ER PT J AU Gronau, M Grossman, Y Shuhmaher, N Soffer, A Zupan, J AF Gronau, M Grossman, Y Shuhmaher, N Soffer, A Zupan, J TI Using untagged B-0 -> DKS to determine gamma SO PHYSICAL REVIEW D LA English DT Article ID CP-VIOLATION; WEAK PHASE; B-MESONS; DECAYS; ASYMMETRIES; PSEUDOSCALARS; MODES; D-0 AB It is shown that the weak phase gamma=arg(-VudVub*VcbVcd*) can be determined using only untagged decays B-0/(B) over bar (0)-->DKS. In order to reduce the uncertainty in gamma, we suggest combining information from B+/--->DK+/- and from untagged B-0 decays, where the D meson is observed in common decay modes. Theoretical assumptions, which may further reduce the statistical error, are also discussed. C1 Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA. Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA. Jozef Stefan Inst, Ljubljana 1001, Slovenia. RP Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. NR 62 TC 20 Z9 20 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 113003 DI 10.1103/PhysRevD.69.113003 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900013 ER PT J AU Jones, G Maloney, A Strominger, A AF Jones, G Maloney, A Strominger, A TI Nonsingular solutions for s-branes SO PHYSICAL REVIEW D LA English DT Article ID BLACK-HOLES; STRINGS AB Exact, nonsingular, time-dependent solutions of Maxwell-Einstein gravity with and without dilatons are constructed by double Wick rotating a variety of static, axisymmetric solutions. This procedure transforms arrays of charged or neutral black holes into s-brane (spacelike brane) solutions, i.e., extended, short-lived spacelike defects. Along the way, new static solutions corresponding to arrays of alternating-charge Reissner-Nordstrom black holes, as well as their dilatonic generalizations, are found. Their double Wick rotation yields s-brane solutions which are periodic in imaginary time and potential large-N duals for the creation or decay of unstable D-branes in string theory. C1 Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Dept Phys, Stanford, CA 94309 USA. RP Jones, G (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. NR 37 TC 18 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 12 AR 126008 DI 10.1103/PhysRevD.69.126008 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 838AA UT WOS:000222681600100 ER PT J AU Kahana, DE Kahana, SH AF Kahana, DE Kahana, SH TI Pentaquark as a kaon-nucleon resonance SO PHYSICAL REVIEW D LA English DT Article ID 1.5 GEV-C; CROSS-SECTION; SKYRME MODEL; FIELD THEORY; BARYONS; SCATTERING; QUARK; STATE; I=0 AB Several recent experiments have reported evidence for a narrow feature in the K+-neutron system, an apparent resonant state similar to100 MeV above threshold and with a width less than or equal to25 MeV. This state has been labeled as Theta(+) (previously as Z*), and because of the implied inclusion of a strange antiquark is referred to as a pentaquark, that is, five quarks within a single bag. We present an alternative explanation for such a structure, as a higher angular momentum resonance in the isospin zero K+N system. One might call this an exit channel or molecular resonance. In a nonrelativistic potential model we find a possible candidate for the kaon-nucleon system with a relative angular momentum L=3, while L=1 states possess centripetal barriers much too low to confine the kaon and nucleon at an energy so high above threshold. Under some circumstances, however, an L=2 state can exist. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP 31 Pembrook Dr, Stony Brook, NY 11790 USA. OI Kahana, David Ewan/0000-0003-1266-9089 NR 50 TC 10 Z9 10 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 117502 DI 10.1103/PhysRevD.69.117502 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900071 ER PT J AU Kretzer, S Lai, HL Olness, FI Tung, WK AF Kretzer, S Lai, HL Olness, FI Tung, WK TI CTEQ6 parton distributions with heavy quark mass effects SO PHYSICAL REVIEW D LA English DT Article ID DEEP-INELASTIC-SCATTERING; NEUTRINO-NUCLEON SCATTERING; FLAVOR STRUCTURE FUNCTIONS; OPPOSITE-SIGN DIMUONS; ORDER QCD ANALYSIS; CHARM PRODUCTION; INTRINSIC CHARM; ELECTROPRODUCTION; HERA; LEPTOPRODUCTION AB Previously published CTEQ6 parton distributions adopt the conventional zero-mass parton scheme since the corresponding hard cross sections are universally available. For precision observables which are sensitive to charm and bottom quark mass effects, we provide in this paper an improved CTEQ6HQ parton distribution set determined in the more general variable flavor number scheme that incorporates heavy flavor mass effects. We describe in detail the QCD scheme and analysis procedure used, examine the predominant features of the new distributions, and compare them with previous distributions. C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. Taipei Municipal Teachers Coll, Taipei, Taiwan. So Methodist Univ, Dept Phys, Dallas, TX 75275 USA. RP Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. NR 57 TC 130 Z9 131 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 114005 DI 10.1103/PhysRevD.69.114005 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900024 ER PT J AU Lamoreaux, SK Torgerson, JR AF Lamoreaux, SK Torgerson, JR TI Neutron moderation in the Oklo natural reactor and the time variation of alpha SO PHYSICAL REVIEW D LA English DT Article ID FINE-STRUCTURE CONSTANT AB In previous analyses of the Oklo (Gabon) natural reactor to test for a possible time variation of the fine-structure constant alpha, a Maxwell-Boltzmann low energy neutron spectrum was assumed. We present here an analysis where a more realistic spectrum is employed and show that the most recent isotopic analysis of samples implies a decrease in alpha, over the last 2x10(9) years since the reactor was operating, of (alpha(past)-alpha(now))/alphagreater than or equal to4.5x10(-8) (6sigma confidence). Issues regarding the interpretation of the shifts of the low energy neutron absorption resonances are discussed. C1 Los Alamos Natl Lab, Phys Div P23, Los Alamos, NM 87545 USA. RP Lamoreaux, SK (reprint author), Los Alamos Natl Lab, Phys Div P23, MS H803, Los Alamos, NM 87545 USA. NR 9 TC 63 Z9 63 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 12 AR 121701 DI 10.1103/PhysRevD.69.121701 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 838AA UT WOS:000222681600001 ER PT J AU Mena, O Parke, S AF Mena, O Parke, S TI Unified graphical summary of neutrino mixing parameters SO PHYSICAL REVIEW D LA English DT Article ID OSCILLATION PARAMETERS; MATTER; SPECTROSCOPY AB The neutrino mixing parameters are presented in a number of different ways by the various experiments, e.g., SuperKamiokande, K2K, SNO, KamLAND, and CHOOZ, and also by the Particle Data Group. In this paper, we argue that presenting the data in terms of sin(2)theta, where theta is the mixing angle appropriate for a given experiment, has a direct physical interpretation. For current atmospheric, solar, and reactor neutrino experiments, the sin(2)theta's are effectively the probabilities of finding a given flavor in a particular neutrino mass eigenstate. The given flavor and particular mass eigenstate vary from experiment to experiment; however, the use of sin(2)theta provides a unified picture of all the data. Using this unified picture we present a graphical way to represent these neutrino mixing parameters which includes the uncertainties. All of this is performed in the context of the present experimental status of three neutrino oscillations. C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA. EM omena@fnal.gov; parke@fnal.gov NR 30 TC 34 Z9 34 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 117301 DI 10.1103/PhysRevD.69.117301 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900067 ER PT J AU Nakao, M Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aso, T Aulchenko, V Aushev, T Bahinipati, S Bakich, AM Ban, Y Bay, A Bitenc, U Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, Y Chuvikov, A Cole, S Danilov, M Dash, M Dong, LY Dragic, J Drutskoy, A Eidelman, S Eiges, V Enari, Y Fang, F Fratina, S Gabyshev, N Garmash, A Gershon, T Gokhroo, G Golob, B Hayashii, H Hazumi, M Higuchi, T Hinz, L Hokuue, T Hoshi, Y Hou, WS Hsiung, YB Iijima, T Inami, K Ishikawa, A Ishino, H Itoh, R Iwasaki, H Iwasaki, M Kang, JH Kang, JS Katayama, N Kawai, H Kawasaki, T Kichimi, H Kim, HJ Kim, JH Kim, SK Kim, TH Kinoshita, K Koppenburg, P Korpar, S Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Lange, JS Lee, SH Lesiak, T Li, J Limosani, A Lin, SW MacNaughton, J Majumder, G Mandl, F Matsumoto, T Mikami, Y Mitaroff, W Miyabayashi, K Miyake, H Miyata, H Mohapatra, D Moloney, GR Mori, T Nagamine, T Nagasaka, Y Nakano, E Nakazawa, H Neichi, K Nishida, S Nitoh, O Nozaki, T Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Pakhlov, P Palka, H Park, H Parslow, N Peak, LS Piilonen, LE Ronga, FJ Rozanska, M Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Schneider, O Schumann, J Schwanda, C Schwartz, AJ Semenov, S Senyo, K Seuster, R Sevior, ME Shwartz, B Singh, JB Soni, N Stamen, R Stanic, S Staric, M Sumiyoshi, T Suzuki, S Tajima, O Takasaki, F Tanaka, M Taylor, GN Teramoto, Y Tomura, T Tsuboyama, T Tsukamoto, T Uehara, S Uglov, T Uno, S Ushiroda, Y Varner, G Varvell, KE Wang, CC Wang, CH Wang, MZ Watanabe, M Yamada, Y Yamaguchi, A Yamashita, Y Yamauchi, M Yang, HY Ying, J Yusa, Y Zhang, CC Zhang, J Zhang, ZP Zhilich, V Ziegler, T Zontar, D AF Nakao, M Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aso, T Aulchenko, V Aushev, T Bahinipati, S Bakich, AM Ban, Y Bay, A Bitenc, U Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, Y Chuvikov, A Cole, S Danilov, M Dash, M Dong, LY Dragic, J Drutskoy, A Eidelman, S Eiges, V Enari, Y Fang, F Fratina, S Gabyshev, N Garmash, A Gershon, T Gokhroo, G Golob, B Hayashii, H Hazumi, M Higuchi, T Hinz, L Hokuue, T Hoshi, Y Hou, WS Hsiung, YB Iijima, T Inami, K Ishikawa, A Ishino, H Itoh, R Iwasaki, H Iwasaki, M Kang, JH Kang, JS Katayama, N Kawai, H Kawasaki, T Kichimi, H Kim, HJ Kim, JH Kim, SK Kim, TH Kinoshita, K Koppenburg, P Korpar, S Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Lange, JS Lee, SH Lesiak, T Li, J Limosani, A Lin, SW MacNaughton, J Majumder, G Mandl, F Matsumoto, T Mikami, Y Mitaroff, W Miyabayashi, K Miyake, H Miyata, H Mohapatra, D Moloney, GR Mori, T Nagamine, T Nagasaka, Y Nakano, E Nakazawa, H Neichi, K Nishida, S Nitoh, O Nozaki, T Ogawa, S Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Pakhlov, P Palka, H Park, H Parslow, N Peak, LS Piilonen, LE Ronga, FJ Rozanska, M Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Schneider, O Schumann, J Schwanda, C Schwartz, AJ Semenov, S Senyo, K Seuster, R Sevior, ME Shwartz, B Singh, JB Soni, N Stamen, R Stanic, S Staric, M Sumiyoshi, T Suzuki, S Tajima, O Takasaki, F Tanaka, M Taylor, GN Teramoto, Y Tomura, T Tsuboyama, T Tsukamoto, T Uehara, S Uglov, T Uno, S Ushiroda, Y Varner, G Varvell, KE Wang, CC Wang, CH Wang, MZ Watanabe, M Yamada, Y Yamaguchi, A Yamashita, Y Yamauchi, M Yang, HY Ying, J Yusa, Y Zhang, CC Zhang, J Zhang, ZP Zhilich, V Ziegler, T Zontar, D CA Belle Collaboration TI Measurement of the B -> K*gamma branching fractions and asymmetries SO PHYSICAL REVIEW D LA English DT Article ID TO-LEADING ORDER; K-ASTERISK-GAMMA; B-MESON DECAYS; RADIATIVE DECAYS; QCD AB We report measurements of the radiative decay B-->K*gamma. The analysis is based on a data sample containing 85.0x10(6) B meson pairs collected by the Belle detector at the KEKB storage ring. We measure branching fractions of B(B-0-->K*(0)gamma)=(4.01+/-0.21+/-0.17)x10(-5) and B(B+-->K*(+)gamma)=(4.25+/-0.31+/-0.24)x10(-5), where the first and second errors are statistical and systematic, respectively. The isospin asymmetry between B-0 and B+ decay widths is measured to be Delta(0+)=+0.012+/-0.044+/-0.026, assuming an equal production rate for (BB)-B-0 $$($) over bar (0) and B+B- pairs from the Y(4S) resonance. We search for a partial rate asymmetry between CP conjugate modes, and find A(CP)(B-->K*gamma)=-0.015+/-0.044+/-0.012. C1 High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Chiba Univ, Chiba, Japan. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Frankfurt, D-6000 Frankfurt, Germany. Univ Hawaii, Honolulu, HI 96822 USA. Hiroshima Inst Technol, Hiroshima, Japan. Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China. Inst High Energy Phys, Vienna, Austria. Inst Theoret & Expt Phys, Moscow 117259, Russia. Jozef Stefan Inst, Ljubljana, Slovenia. Kanagawa Univ, Yokohama, Kanagawa, Japan. Korea Univ, Seoul 136701, South Korea. Kyungpook Natl Univ, Taegu 702701, South Korea. EPFL, Swiss Fed Inst Technol, CH-1015 Lausanne, Switzerland. Univ Ljubljana, Ljubljana, Slovenia. Univ Maribor, SLO-2000 Maribor, Slovenia. Univ Melbourne, Melbourne, Vic, Australia. Nagoya Univ, Nagoya, Aichi, Japan. Nara Womens Univ, Nara 630, Japan. Natl United Univ, Miaoli, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei, Taiwan. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Nihon Dent Coll, Niigata, Japan. Niigata Univ, Niigata, Japan. Osaka City Univ, Osaka 558, Japan. Osaka Univ, Osaka, Japan. Panjab Univ, Chandigarh 160014, India. Peking Univ, Beijing 100871, Peoples R China. Princeton Univ, Princeton, NJ 08545 USA. Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA. Univ Sci & Technol China, Hefei 230026, Peoples R China. Seoul Natl Univ, Seoul, South Korea. Sungkyunkwan Univ, Suwon, South Korea. Univ Sydney, Sydney, NSW 2006, Australia. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Toho Univ, Funabashi, Chiba 274, Japan. Tohoku Gakuin Univ, Tagajo, Miyagi, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Inst Technol, Tokyo 152, Japan. Tokyo Metropolitan Univ, Tokyo 158, Japan. Tokyo Univ Agr & Technol, Tokyo, Japan. Toyama Natl Coll Maritime Technol, Toyama, Japan. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Utkal Univ, Bhubaneswar 751004, Orissa, India. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Yokkaichi Univ, Yokaichi, Japan. Yonsei Univ, Seoul 120749, South Korea. RP Nakao, M (reprint author), High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki, Japan. RI Chistov, Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016; Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Nitoh, Osamu/C-3522-2013; Ishino, Hirokazu/C-1994-2015; Kim, Sun Kee/G-2042-2015; Pakhlov, Pavel/K-2158-2013; Uglov, Timofey/B-2406-2014; Danilov, Mikhail/C-5380-2014; Krokovny, Pavel/G-4421-2016 OI Chistov, Ruslan/0000-0003-1439-8390; Drutskoy, Alexey/0000-0003-4524-0422; Aihara, Hiroaki/0000-0002-1907-5964; Ishino, Hirokazu/0000-0002-8623-4080; Kim, Sun Kee/0000-0002-0013-0775; Pakhlov, Pavel/0000-0001-7426-4824; Uglov, Timofey/0000-0002-4944-1830; Danilov, Mikhail/0000-0001-9227-5164; Krokovny, Pavel/0000-0002-1236-4667 NR 16 TC 88 Z9 88 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUN PY 2004 VL 69 IS 11 AR 112001 DI 10.1103/PhysRevD.69.112001 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 835RJ UT WOS:000222502900007 ER PT J AU Aivalis, KG Kurien, S Schumacher, J Sreenivasan, KR AF Aivalis, KG Kurien, S Schumacher, J Sreenivasan, KR TI Sign-symmetry of temperature structure functions SO PHYSICAL REVIEW E LA English DT Article ID FULLY-DEVELOPED TURBULENCE; FLOWS AB New scalar structure functions with different sign-symmetry properties are defined. These structure functions possess different scaling exponents even when their order is the same. Their scaling properties are investigated for second and third orders, using data from high-Reynolds-number atmospheric boundary layer. It is only when structure functions with disparate sign-symmetry properties are compared can the extended self-similarity detect two different scaling ranges that may exist, as in the example of convective turbulence. C1 Yale Univ, Dept Mech Engn, New Haven, CT 06520 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87455 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87455 USA. Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany. Int Ctr Theoret Phys, I-34014 Trieste, Italy. RP Aivalis, KG (reprint author), Yale Univ, Dept Mech Engn, New Haven, CT 06520 USA. NR 16 TC 0 Z9 0 U1 1 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066315 DI 10.1103/PhysRevE.69.066315 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800086 ER PT J AU Boettcher, S Percus, AG AF Boettcher, S Percus, AG TI Extremal optimization at the phase transition of the three-coloring problem SO PHYSICAL REVIEW E LA English DT Article ID COMPUTATIONAL-COMPLEXITY; SATISFIABILITY PROBLEMS; GRAPH; SEARCH; MODEL AB We investigate the phase transition in vertex coloring on random graphs, using the extremal optimization heuristic. Three-coloring is among the hardest combinatorial optimization problems and is equivalent to a 3-state anti-ferromagnetic Potts model. Like many other such optimization problems, it has been shown to exhibit a phase transition in its ground state behavior under variation of a system parameter: the graph's mean vertex degree. This phase transition is often associated with the instances of highest complexity. We use extremal optimization to measure the ground state cost and the "backbone," an order parameter related to ground state overlap, averaged over a large number of instances near the transition for random graphs of size n up to 512. For these graphs, benchmarks show that extremal optimization reaches ground states and explores a sufficient number of them to give the correct backbone value after about O(n(3.5)) update steps. Finite size scaling yields a critical mean degree value alpha(c)=4.703(28). Furthermore, the exploration of the degenerate ground states indicates that the backbone order parameter, measuring the constrainedness of the problem, exhibits a first-order phase transition. C1 Emory Univ, Dept Phys, Atlanta, GA 30322 USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA. Univ Calif Los Angeles, Inst Pure & Appl Math, Los Angeles, CA 90049 USA. RP Emory Univ, Dept Phys, Atlanta, GA 30322 USA. EM sboettc@emory.edu; percus@ipam.ucla.edu RI Boettcher, Stefan/G-2640-2010 OI Boettcher, Stefan/0000-0003-1273-6771 NR 35 TC 38 Z9 38 U1 1 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066703 DI 10.1103/PhysRevE.69.066703 PN 2 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800131 PM 15244779 ER PT J AU Krinsky, S AF Krinsky, S TI Model for nonlinear behavior in the self-amplified spontaneous-emission free-electron laser SO PHYSICAL REVIEW E LA English DT Article AB We introduce a simplified model for the saturation of a self-amplified spontaneous-emission free-electron laser. Within this model, we determine the effect of nonlinearity upon the statistical properties of the output radiation. Comparing our results with the computer simulations of Saldin, Schneidmiller, and Yurkov [The Physics of Free Electron Lasers (Springer-Verlag, Berlin, 2000)], we find that the model provides a good description of the average intensity, field correlation function, and coherence time, but underestimates the intensity fluctuation. Asymmetric spectral broadening phenomena are not included in the model. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Krinsky, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066503 DI 10.1103/PhysRevE.69.066503 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800108 PM 15244756 ER PT J AU Kurien, S Taylor, MA Matsumoto, T AF Kurien, S Taylor, MA Matsumoto, T TI Cascade time scales for energy and helicity in homogeneous isotropic turbulence SO PHYSICAL REVIEW E LA English DT Article ID HIGH-REYNOLDS-NUMBER; FULLY-DEVELOPED TURBULENCE; 3-DIMENSIONAL TURBULENCE; STATISTICS; DISSIPATION; SPECTRUM; FLOWS; RANGE AB We extend the Kolmogorov phenomenology for the scaling of energy spectra in high-Reynolds-number turbulence, to explicitly include the effect of helicity. There exists a time scale tau(H) for helicity transfer in homogeneous, isotropic turbulence with helicity. We arrive at this time scale using the phenomenological arguments used by Kraichnan to derive the time scale tau(E) for energy transfer [R. H. Kraichnan, J. Fluid Mech. 47, 525 (1971)]. We show that in general tau(H) may not be neglected compared to tau(E), even for rather low relative helicity. We then deduce an inertial range joint cascade of energy and helicity in which the dynamics are dominated by tau(E) in the low wave numbers with both energy and helicity spectra scaling as k(-5/3); and by tau(H) at larger wave numbers with spectra scaling as k(-4/3). We demonstrate how, within this phenomenology, the commonly observed "bottleneck" in the energy spectrum might be explained. We derive a wave number k(h) which is less than the Kolmogorov dissipation wave number, at which both energy and helicity cascades terminate due to dissipation effects. Data from direct numerical simulations are used to check our predictions. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA. Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan. RP Kurien, S (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. NR 27 TC 29 Z9 29 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066313 DI 10.1103/PhysRevE.69.066313 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800084 PM 15244732 ER PT J AU Lin, AL Hagberg, A Meron, E Swinney, HL AF Lin, AL Hagberg, A Meron, E Swinney, HL TI Resonance tongues and patterns in periodically forced reaction-diffusion systems SO PHYSICAL REVIEW E LA English DT Article ID BELOUSOV-ZHABOTINSKII REACTION; SPIRAL-WAVE DYNAMICS; EXCITABLE MEDIA; OSCILLATORY SYSTEMS; CHEMICAL-SYSTEM; GLOBAL FEEDBACK; ACTIVE MEDIA; SYNCHRONIZATION; MODULATION; DEFECTS AB Various resonant and near-resonant patterns form in a light-sensitive Belousov-Zhabotinsky (BZ) reaction in response to a spatially homogeneous time-periodic perturbation with light. The regions (tongues) in the forcing frequency and forcing amplitude parameter plane where resonant patterns form are identified through analysis of the temporal response of the patterns. Resonant and near-resonant responses are distinguished. The unforced BZ reaction shows both spatially uniform oscillations and rotating spiral waves, while the forced system shows patterns such as standing-wave labyrinths and rotating spiral waves. The patterns depend on the amplitude and frequency of the perturbation, and also on whether the system responds to the forcing near the uniform oscillation frequency or the spiral wave frequency. Numerical simulations of a forced FitzHugh-Nagumo reaction-diffusion model show both resonant and near-resonant patterns similar to the BZ chemical system. C1 Duke Univ, Ctr Nonlinear & Complex Syst, Durham, NC 27708 USA. Duke Univ, Dept Phys, Durham, NC 27708 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Ben Gurion Univ Negev, Dept Solar Energy & Environm Phys, BIDR, IL-84990 Sede Boqer, Israel. Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel. Univ Texas, Ctr Nonlinear Dynam, Austin, TX 78712 USA. Univ Texas, Dept Phys, Austin, TX 78712 USA. RP Lin, AL (reprint author), Duke Univ, Ctr Nonlinear & Complex Syst, Durham, NC 27708 USA. EM aric@lanl.gov; ehud@bgumail.bgu.ac.il RI MERON, EHUD/F-1810-2012 NR 41 TC 49 Z9 49 U1 1 U2 8 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066217 DI 10.1103/PhysRevE.69.066217 PN 2 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800070 PM 15244718 ER PT J AU Loch, SD Fontes, CJ Colgan, J Pindzola, MS Ballance, CP Griffin, DC O'Mullane, MG Summers, HP AF Loch, SD Fontes, CJ Colgan, J Pindzola, MS Ballance, CP Griffin, DC O'Mullane, MG Summers, HP TI Collisional-radiative study of lithium plasmas SO PHYSICAL REVIEW E LA English DT Article ID ELECTRON-IMPACT EXCITATION; MULTIPLY-CHARGED IONS; LEVEL POPULATIONS; HYDROGENIC IONS; RECOMBINATION; IONIZATION; KINETICS; LI AB The sensitivity of lithium plasma models to the underlying atomic data is investigated. Collisional-radiative modeling is carried out with both the Los Alamos and ADAS suite of codes. The effects of plane-wave Born, distorted-wave, and nonperturbative R-matrix with pseudostates and time-dependent close-coupling electron impact atomic data on derived plasma quantities such as the ionization balance and radiated power are studied. Density and temperature regimes are identified where nonperturbative excitation and ionization rate coefficients must be used. The electron temperature and density ranges investigated were 0.2 eVless than or equal toT(e)less than or equal to90 eV and 10(10) cm(-3)less than or equal toN(e)less than or equal to10(14) cm(-3). C1 Auburn Univ, Dept Phys, Auburn, AL 36849 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Rollins Coll, Dept Phys, Winter Pk, FL 32789 USA. Univ Strathclyde, Dept Phys, Glasgow G4 0NG, Lanark, Scotland. RP Auburn Univ, Dept Phys, Auburn, AL 36849 USA. NR 24 TC 23 Z9 23 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066405 DI 10.1103/PhysRevE.69.066405 PN 2 PG 16 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800095 PM 15244743 ER PT J AU Lu, WC Wang, CZ Ho, KM AF Lu, WC Wang, CZ Ho, KM TI Effect of chain connectivity on the structure of Lennard-Jones liquid and its implication on statistical potentials for protein folding SO PHYSICAL REVIEW E LA English DT Article ID KNOWLEDGE-BASED POTENTIALS; LATTICE-MODEL; COMPUTER-SIMULATION; GLOBULAR-PROTEINS; PACKING DENSITY; POLYMER MELTS; MONTE-CARLO; RECOGNITION; ENERGY; PREDICTION AB Statistical contact potentials and bead-spring models have been widely used for computational studies of protein folding. However, there has been speculation that systematic error may arise in the contact energy calculations when the statistical potentials are deduced under the assumption that the chain connectivity in proteins can be ignored. To address this issue, we have performed molecular-dynamics simulations to study the structure and dynamics of a simple liquid system in which the beads are either connected or unconnected with springs. Results from the present study provide useful information for assessing the accuracy of the statistical potentials for protein structure simulations. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Jilin Univ, State Key Lab Theoret & Computat Chem, Changchun 130023, Peoples R China. RP Wang, CZ (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM wangcz@ameslab.gov NR 47 TC 1 Z9 1 U1 1 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 061920 DI 10.1103/PhysRevE.69.061920 PN 1 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RH UT WOS:000222502700100 ER PT J AU Marti, J Csajka, FS AF Marti, J Csajka, FS TI Transition path sampling study of flip-flop transitions in model lipid bilayer membranes SO PHYSICAL REVIEW E LA English DT Article ID MOLECULAR-DYNAMICS SIMULATION; PHOSPHOLIPID-BILAYERS; LIQUID WATER; SODIUM-CHLORIDE; DISSOCIATION; TRANSPORT AB The microscopic dynamics of lipids in biomembranes is of special relevance in the study of chemical reactions produced in cells. The mechanism of the exchange of a model lipid molecule between both sides of a flexible bilayer membrane or flip-flop in an aqueous environment has been studied by computer simulation using the recently developed transition path sampling technique, since flip-flop transitions are infrequent events of the lipid dynamics. In addition, structural changes in the membrane have been investigated at ambient conditions and for increasing temperature. Our results highlight the cooperative effort of the whole system in order to allow a lipid molecule to cross the bottleneck in configuration space associated with the transition state of the flip-flop event. Within the time interval of the transition, all molecules of the system significantly change the frequency of their molecular motions. C1 Tech Univ Catalonia, Dept Phys & Nucl Engn, Barcelona 08034, Spain. Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Marti, J (reprint author), Tech Univ Catalonia, Dept Phys & Nucl Engn, B5-206 Campus Nord, Barcelona 08034, Spain. EM jordi.marti@upc.es RI Marti, Jordi/H-5414-2015 OI Marti, Jordi/0000-0002-3721-9634 NR 29 TC 18 Z9 18 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 061918 DI 10.1103/PhysRevE.69.061918 PN 1 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RH UT WOS:000222502700098 PM 15244628 ER PT J AU Okamoto, H Okabe, K Yuri, Y Mohl, D Sessler, AM AF Okamoto, H Okabe, K Yuri, Y Mohl, D Sessler, AM TI One-dimensional ordering of ultra-low-density ion beams in a storage ring SO PHYSICAL REVIEW E LA English DT Article AB The two-particle model, first introduced by Hasse, is employed to predict the beam temperature at which a one-dimensional ordered state of ions will be established in a cooler storage ring. The proposed state does not have the ions (in the beam frame) at rest, but simply has them not passing each other; i.e., remaining in the same (ordered) sequence. The model is applicable to an ultra-low-density beam where collective Coulomb interactions are negligible. It is pointed out that the nature of the anomalous beam behavior observed in electron-cooling experiments at GSI (Darmstadt) and MSL (Stockholm) is approximately free from such parameters as the lattice design, ion species, beam density, and energy. On the basis of the model, which is put in Hamiltonian form, scaled, and numerically studied, a universal criterion of one-dimensional beam ordering at low line density is derived. Analytic work is employed to explain the numerical results and derives an approximate criterion. C1 Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan. CERN, CH-1211 Geneva, Switzerland. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Okamoto, H (reprint author), Hiroshima Univ, Grad Sch Adv Sci Matter, 1-3-1 Kagamiyama, Higashihiroshima 7398530, Japan. NR 13 TC 8 Z9 8 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066504 DI 10.1103/PhysRevE.69.066504 PN 2 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800109 PM 15244757 ER PT J AU Solodov, AA Malkin, VM Fisch, NJ AF Solodov, AA Malkin, VM Fisch, NJ TI Pump side scattering in ultrapowerful backward Raman amplifiers SO PHYSICAL REVIEW E LA English DT Article ID SHORT LASER-PULSES AB Extremely large laser power might be obtained by compressing laser pulses through backward Raman amplification (BRA) in plasmas. Premature Raman backscattering of a laser pump by plasma noise might be suppressed by an appropriate detuning of the Raman resonance, even as the desired amplification of the seed persists with a high efficiency. In this paper we analyze side scattering of laser pumps by plasma noise in backward Raman amplifiers. Though its growth rate is smaller than that of backscattering, the side scattering can nevertheless be dangerous, because of a longer path of side-scattered pulses in plasmas and because of an angular dependence of the Raman resonance detuning. We show that side scattering of laser pumps by plasma noise in BRA might be suppressed to a tolerable level at all angles by an appropriate combination of two detuning mechanisms associated with plasma density gradient and pump chirp. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Solodov, AA (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 5 TC 13 Z9 13 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066413 DI 10.1103/PhysRevE.69.066413 PN 2 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800103 PM 15244751 ER PT J AU Stephens, RB Snavely, RA Aglitskiy, Y Amiranoff, F Andersen, C Batani, D Baton, SD Cowan, T Freeman, RR Hall, T Hatchett, SP Hill, JM Key, MH King, JA Koch, JA Koenig, M MacKinnon, AJ Lancaster, KL Martinolli, E Norreys, P Perelli-Cippo, E Le Gloahec, MR Rousseaux, C Santos, JJ Scianitti, F AF Stephens, RB Snavely, RA Aglitskiy, Y Amiranoff, F Andersen, C Batani, D Baton, SD Cowan, T Freeman, RR Hall, T Hatchett, SP Hill, JM Key, MH King, JA Koch, JA Koenig, M MacKinnon, AJ Lancaster, KL Martinolli, E Norreys, P Perelli-Cippo, E Le Gloahec, MR Rousseaux, C Santos, JJ Scianitti, F TI K-alpha fluorescence measurement of relativistic electron transport in the context of fast ignition SO PHYSICAL REVIEW E LA English DT Article ID LASER-PLASMA INTERACTIONS; IN-CELL SIMULATIONS; SOLID TARGETS; ENERGY ELECTRONS; FUSION; PULSES; RADIOGRAPHY; ABSORPTION; IONIZATION; RADIATION AB Electron transport within solid targets, irradiated by a high-intensity short-pulse laser, has been measured by imaging K-alpha radiation from high- Z layers (Cu, Ti) buried in low- Z (CH, Al) foils. Although the laser spot is similar to10 mum [full width at half maximum (FWHM)], the electron beam spreads to greater than or equal to70 mum FWHM within <20 mum of penetration into an Al target then, at depths >100 mum, diverges with a 40degrees spreading angle. Monte Carlo and analytic models are compared to our data. We find that a Monte Carlo model with a heuristic model for the electron injection gives a reasonable fit with our data. C1 Gen Atom Co, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. Univ Paris 06, Ecole Polytech, Lab Utilisat Lasers Intenses, CEA,CNRS,UMR 7605, F-91128 Palaiseau, France. Commissariat Energie Atom, F-91680 Bruyeres Le Chatel, France. Univ Milano Bicocca, Dipartimento Fis G Ochialini, I-20126 Milan, Italy. INFM, I-20126 Milan, Italy. Univ Essex, Dept Phys, Colchester CO4 SSQ, Essex, England. Rutherford Appleton Lab, Chilton OX11 0QX, Oxon, England. RP Stephens, RB (reprint author), Gen Atom Co, San Diego, CA 92186 USA. RI Koenig, Michel/A-2167-2012; MacKinnon, Andrew/P-7239-2014; Cowan, Thomas/A-8713-2011; OI MacKinnon, Andrew/0000-0002-4380-2906; Cowan, Thomas/0000-0002-5845-000X; Stephens, Richard/0000-0002-7034-6141 NR 52 TC 188 Z9 190 U1 0 U2 14 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066414 DI 10.1103/PhysRevE.69.066414 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800104 PM 15244752 ER PT J AU Warshavsky, VB Song, XY AF Warshavsky, VB Song, XY TI Calculations of free energies in liquid and solid phases: Fundamental measure density-functional approach SO PHYSICAL REVIEW E LA English DT Article ID HARD-SPHERE MIXTURES; PERTURBATION-THEORY; THERMODYNAMIC PROPERTIES; CLASSICAL SOLIDS; FLUID; CRYSTAL; STATE; EQUATION; MODEL AB In this paper, a theoretical description of the free energies and correlation functions of hard-sphere (HS) liquid and solid phases is developed using fundamental measure density-functional theory. Within the framework of Weeks-Chandler-Andersen perturbation theory, free energies of liquid and solid phases with many interaction potentials can be obtained from these characteristics of the HS system within a single theoretical description. An application to the Lennard-Jones system yields liquid-solid coexistence results in good agreement with the ones from simulations. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. RP Warshavsky, VB (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. NR 42 TC 21 Z9 21 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 061113 DI 10.1103/PhysRevE.69.061113 PN 1 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RH UT WOS:000222502700016 PM 15244546 ER PT J AU Wohlbier, JG Booske, JH AF Wohlbier, JG Booske, JH TI Mechanisms for phase distortion in a traveling wave tube SO PHYSICAL REVIEW E LA English DT Article ID AMPLIFIERS AB We present a view of the physics of phase distortion in a traveling wave tube (TWT) based on unique insights afforded by the MUSE models of a TWT [J. Wohlbier, J. Booske, and I. Dobson, IEEE Trans. Plasma Sci. 30, 1063 (2002)]. The conclusion, supported by analytic theory and simulations, is that prior to gain compression phase distortion is due to harmonic frequencies in the electron beam and the resulting "intermodulation" frequency at the fundamental, and not the often cited "slowing down of electrons in the electron beam." We draw these conclusions based on MUSE simulations that allow explicit control of electron beam frequency content, an analytic solution to the S-MUSE model [J. Wohlbier, J. Booske, and I. Dobson, IEEE Trans. Plasma Sci. 30, 1063 (2002)] that reveals that phase distortion is due to the fact that the fundamental frequency is an intermodulation product of itself, and large signal LATTE [J. Wohlbier, J. Booske, and I. Dobson, IEEE Trans. Plasma Sci. 30, 1063 (2002)] simulations that are modified to remove the effect of the slowing down of electrons in the electron beam. As applications of the theory we compare S-MUSE simulations to an amplitude phase model using the analytic phase transfer curve, we study dependence of phase distortion on circuit dispersion and electron beam parameters at the second harmonic with large signal LATTE simulations for narrow and wide band TWT designs, and we consider the phase distortion theory in the context of TWT linearization. C1 Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. RP Wohlbier, JG (reprint author), LANL, MS H851, Los Alamos, NM 87545 USA. NR 19 TC 3 Z9 3 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JUN PY 2004 VL 69 IS 6 AR 066502 DI 10.1103/PhysRevE.69.066502 PN 2 PG 16 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 835RI UT WOS:000222502800107 ER PT J AU Bane, KLF Stupakov, G AF Bane, KLF Stupakov, G TI Transition radiation wakefields for a beam passing through a metallic foil SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB In the x-ray, free-electron laser project, the Linac Coherent Light Source (LCLS), a proposal has been made to generate a shorter light pulse by placing a spoiler foil in the middle of a compressor chicane: The foil has a small slot, which selects out the small fraction of particles passing through it ("target particles'') to lase. In this report, using the method of field matching, we obtain longitudinal and transverse impedances and wakefields for several models of the proposed LCLS spoiler foil. We consider the model of a pencil beam and of a cylindrically symmetric, bi-Gaussian beam that is wider than it is long. Third, we generate a Green function that allows us to consider asymmetric beams also. For target particles of the tilted, tri-Gaussian beam that is found at the LCLS spoiler location we obtain approximate analytical formulas and numerical results for wakefield kicks in the three directions. We find that the kicks, after correction using a simple dipole and quadrupole, are all within tolerances. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Bane, KLF (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 11 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 064401 DI 10.1103/PhysRevSTAB.7.064401 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400012 ER PT J AU Brown, WJ Hartemann, FV AF Brown, WJ Hartemann, FV TI Three-dimensional time and frequency-domain theory of femtosecond x-ray pulse generation through Thomson scattering SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID COMPTON-SCATTERING; STRUCTURAL DYNAMICS; ELECTRON-BEAMS; LASER-PULSES; SASE-FEL; DIFFRACTION; LINAC; ATF AB The generation of high intensity, ultrashort x-ray pulses enables exciting new experimental capabilities, such as femtosecond pump-probe experiments used to temporally resolve material structural dynamics on atomic time scales. Thomson backscattering of a high intensity laser pulse with a bright relativistic electron bunch is a promising method for producing such high-brightness x-ray pulses in the 10 - 100 keV range within a compact facility. While a variety of methods for producing subpicosecond x-ray bursts by Thomson scattering exist, including compression of the electron bunch to subpicosecond bunch lengths and/or colliding a subpicosecond laser pulse in a side-on geometry to minimize the interaction time, a promising alternative approach to achieving this goal while maintaining ultrahigh brightness is the production of a time-correlated ( or chirped) x-ray pulse in conjunction with pulse slicing or compression. We present the results of a complete analysis of this process using a recently developed 3D time and frequency-domain code for analyzing the spatial, temporal, and spectral properties an x-ray beam produced by relativistic Thomson scattering. Based on the relativistic differential cross section, this code has the capability to calculate time and space dependent spectra of the x-ray photons produced from linear Thomson scattering for both bandwidth-limited and chirped incident laser pulses. Spectral broadening of the scattered x-ray pulse resulting from the incident laser bandwidth, laser focus, and the transverse and longitudinal phase space of the electron beam were examined. Simulations of chirped x-ray pulse production using both a chirped electron beam and a chirped laser pulse are presented. Required electron beam and laser parameters are summarized by investigating the effects of beam emittance, energy spread, and laser bandwidth on the scattered x-ray spectrum. It is shown that sufficient temporal correlation in the scattered x-ray spectrum to produce sub-100 fs temporal slice resolution can be produced from state-of-the-art, high-brightness electron beams without the need to perform longitudinal compression on the electron bunch. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Brown, WJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 28 TC 58 Z9 60 U1 2 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 060703 DI 10.1103/PhysRevSTAB.7.060703 PG 20 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400004 ER PT J AU Brown, WJ Anderson, SG Barty, CPJ Betts, SM Booth, R Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Hartemann, FV Hartouni, EP Kuba, J Le Sage, GP Slaughter, DR Tremaine, AM Wootton, AJ Springer, PT Rosenzweig, JB AF Brown, WJ Anderson, SG Barty, CPJ Betts, SM Booth, R Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Hartemann, FV Hartouni, EP Kuba, J Le Sage, GP Slaughter, DR Tremaine, AM Wootton, AJ Springer, PT Rosenzweig, JB TI Experimental characterization of an ultrafast Thomson scattering x-ray source with three-dimensional time and frequency-domain analysis SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID COMPTON-SCATTERING; STRUCTURAL DYNAMICS; ELECTRON-BEAMS; LASER-PULSES; SASE-FEL; GENERATION; DIFFRACTION; TERAWATT; LINAC AB We present a detailed comparison of the measured characteristics of Thomson backscattered x rays produced at the Picosecond Laser-Electron Interaction for the Dynamic Evaluation of Structures facility at Lawrence Livermore National Laboratory to predicted results from a newly developed, fully three-dimensional time and frequency-domain code. Based on the relativistic differential cross section, this code has the capability to calculate time and space dependent spectra of the x-ray photons produced from linear Thomson scattering for both bandwidth-limited and chirped incident laser pulses. Spectral broadening of the scattered x-ray pulse resulting from the incident laser bandwidth, perpendicular wave vector components in the laser focus, and the transverse and longitudinal phase spaces of the electron beam are included. Electron beam energy, energy spread, and transverse phase space measurements of the electron beam at the interaction point are presented, and the corresponding predicted x-ray characteristics are determined. In addition, time-integrated measurements of the x rays produced from the interaction are presented and shown to agree well with the simulations. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RP Brown, WJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. OI Hartouni, Edward/0000-0001-9869-4351 NR 28 TC 65 Z9 66 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 060702 DI 10.1103/PhysRevSTAB.7.060702 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400003 ER PT J AU Humphries, S Russell, S Carlsten, B Earley, L Ferguson, P AF Humphries, S Russell, S Carlsten, B Earley, L Ferguson, P TI Circular-to-planar transformations of high-perveance electron beams by asymmetric solenoid lenses SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID POWER MICROWAVE DEVICES; SHEET BEAM; AMPLIFIERS AB The generation and transport of planar electron beams is a topic of increasing interest for applications to high-power, high-frequency microwave devices. This paper describes the use of solenoid lenses with elliptical pole apertures to transform a circular high-perveance beam to a planar configuration. The resulting transformation system has a short axial length and is easily fabricated. Furthermore, the approach allows use of a conventional electron gun. We designed lenses and simulated the dynamics of a beam system to drive a 95 GHz, traveling-wave tube experiment at Los Alamos National Laboratory. The three-dimensional self-consistent calculations indicate that a 0.5 muperv beam can be compressed to a height of less than 0.5 mm with sufficiently low emittance for transport through periodic-permanent-magnet or wiggler arrays. C1 Field Precis, Albuquerque, NM 87192 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. MDS Co, Oakland, CA 94611 USA. RP Humphries, S (reprint author), Field Precis, POB 13595, Albuquerque, NM 87192 USA. NR 25 TC 23 Z9 23 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 060401 DI 10.1103/PhysRevSTAB.7.060401 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400001 ER PT J AU Krafft, GA AF Krafft, GA TI Compact high-power terahertz radiation source SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID COHERENT SYNCHROTRON-RADIATION; ENERGY RECOVERY AB In this paper a new type of THz radiation source, based on recirculating an electron beam through a high gradient superconducting radio frequency cavity, and using this beam to drive a standard electromagnetic undulator on the return leg, is discussed. Because the beam is recirculated and not stored, short bunches may be produced that radiate coherently in the undulator, yielding exceptionally high average THz power for relatively low average beam power. Deceleration from the coherent emission, and the detuning it causes, limits the charge-per-bunch possible in such a device. C1 Jefferson Lab, Ctr Adv Studies Accelerators, Newport News, VA 23608 USA. RP Krafft, GA (reprint author), Jefferson Lab, Ctr Adv Studies Accelerators, Newport News, VA 23608 USA. NR 21 TC 13 Z9 13 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 060704 DI 10.1103/PhysRevSTAB.7.060704 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400005 ER PT J AU Lund, SM Bukh, B AF Lund, SM Bukh, B TI Influence of conducting plate boundary conditions on the transverse envelope equations describing intense ion beam transport SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB In typical diagnostic applications, intense ion beams are intercepted by a conducting plate associated with devices used to measure beam phase-space projections. This results in the transverse space-charge field near the plate being shorted out, rendering simple envelope models with constant space-charge strength inaccurate. Here we develop corrected envelope models based on analytical calculations to account for this effect on the space-charge term of the envelope equations, thereby removing a systematic source of error in the equations and enabling more accurate comparisons with experiment. For common intense beam parameters, we find that the envelope correction occurs primarily in the envelope angles near the plate and that the effect can be large enough to degrade precision beam matching in periodic transport lattices. Results are verified with 3D self-consistent particle-in-cell simulations based on intense beam experiments associated with driver development for heavy-ion fusion. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Lund, SM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM smlund@lbl.gov RI Bukh, Boris/B-8146-2017 OI Bukh, Boris/0000-0003-4559-8336 NR 17 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 064201 DI 10.1103/PhysRevSTAB.7.064201 PG 13 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400009 ER PT J AU Siemann, RH AF Siemann, RH TI Energy efficiency of laser driven, structure based accelerators SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB The acceleration efficiency of a laser driven linear accelerator is analyzed. The laser power, loss factor, and impedances determine the maximum charge that can be accelerated and the efficiency of that acceleration. The accelerator structure can be incorporated into a laser cavity. The equation for the resultant laser pulse is derived and analyzed. A specific example is presented, and the steady-state laser pulse shapes, acceleration efficiency, and average unloaded gradient are calculated. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Siemann, RH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 12 TC 24 Z9 24 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JUN PY 2004 VL 7 IS 6 AR 061303 DI 10.1103/PhysRevSTAB.7.061303 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 835NV UT WOS:000222491400008 ER PT J AU Baylor, LR Burrell, KH Groebner, RJ Houlberg, WA Ernst, DP Murakami, M Wade, MR AF Baylor, LR Burrell, KH Groebner, RJ Houlberg, WA Ernst, DP Murakami, M Wade, MR TI Comparison of toroidal rotation velocities of different impurity ions in the DIII-D tokamak SO PHYSICS OF PLASMAS LA English DT Article ID EXCHANGE RECOMBINATION SPECTROSCOPY; NEOCLASSICAL TRANSPORT; PLASMAS; PROFILES AB Measurements of the relative toroidal rotation velocities of low Z impurity ions have been made in DIII-D tokamak [J. L. Luxon and L. G. Davis, Fusion Technol. 8, 441 (1985)] plasmas that have a strong core pressure gradient and reduced anomalous transport. They show that the differences in toroidal rotation velocities agree with predictions of neoclassical transport theory. The toroidal rotation velocities are measured via charge exchange recombination (CER) spectroscopy of the impurity species. Taking into account the non-negligible effect of energy dependent charge exchange cross sections, quantitative agreement is found between the measured and predicted difference in toroidal rotation velocities, including the strong Z dependence. The predicted difference between the measured impurity rotation velocity and the main ion rotation velocity can be substantial and therefore care should be taken in using quantitative results from impurity rotation measurements and applying them to the bulk plasma. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Gen Atom Co, San Diego, CA USA. MIT, Cambridge, MA 02139 USA. RP Baylor, LR (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Ernst, Darin/A-1487-2010 OI Ernst, Darin/0000-0002-9577-2809 NR 22 TC 18 Z9 18 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUN PY 2004 VL 11 IS 6 BP 3100 EP 3105 DI 10.1063/1.1710900 PG 6 WC Physics, Fluids & Plasmas SC Physics GA 822KW UT WOS:000221539300018 ER PT J AU Hansen, JF Tripathi, SKP Bellan, PM AF Hansen, JF Tripathi, SKP Bellan, PM TI Co- and counter-helicity interaction between two adjacent laboratory prominences SO PHYSICS OF PLASMAS LA English DT Article ID MAGNETIC RECONNECTION; SOLAR-FLARE; FIELDS; MODEL; INITIATION; ERUPTIONS; EVOLUTION; FLUX AB The interaction between two side-by-side solar prominence-like plasmas has been studied using a four-electrode magnetized plasma source that can impose a wide variety of surface boundary conditions. When the source is arranged to create two prominences with the same helicity (co-helicity), it is observed that helicity transfer from one prominence to the other causes the receiving prominence to erupt sooner and faster than the transmitting prominence. When the source is arranged to create two prominences with opposite helicity (counter-helicity), it is observed that upon merging, prominences wrap around each other to form closely spaced, writhing turns of plasma. This is followed by appearance of a distinct bright region in the middle and order of magnitude higher emission of soft x rays. The four-electrode device has also been used to change the angle of the neutral line and so form more pronounced S-shapes. (C) 2004 American Institute of Physics. C1 CALTECH, Pasadena, CA 91125 USA. RP Hansen, JF (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 21 TC 19 Z9 19 U1 2 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUN PY 2004 VL 11 IS 6 BP 3177 EP 3185 DI 10.1063/1.1724831 PG 9 WC Physics, Fluids & Plasmas SC Physics GA 822KW UT WOS:000221539300024 ER PT J AU Kaganovich, I Startsev, E Shvets, G AF Kaganovich, I Startsev, E Shvets, G TI Anomalous skin effect for anisotropic electron velocity distribution function SO PHYSICS OF PLASMAS LA English DT Article ID PLASMA AB The anomalous skin effect in a plasma with a highly anisotropic electron velocity distribution function (EVDF) is very different from the skin effect in a plasma with isotropic EVDF. An analytical solution was derived for the electric field penetrated into plasma with the EVDF described as a Maxwellian with two temperatures T-x>>T-z, where x is the direction along the plasma boundary and z is the direction perpendicular to the plasma boundary. The skin layer was found to consist of two distinct regions of width of order v(Tx)/omega and v(Tz)/omega, where v(Tx,z)=rootT(x,z)/m is the thermal electron velocity and omega is the incident wave frequency. (C) 2004 American Institute of Physics. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Univ Texas, Inst Fus Studies, Austin, TX 78712 USA. RP Kaganovich, I (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUN PY 2004 VL 11 IS 6 BP 3328 EP 3330 DI 10.1063/1.1723461 PG 3 WC Physics, Fluids & Plasmas SC Physics GA 822KW UT WOS:000221539300044 ER PT J AU Krommes, JA Kolesnikov, RA AF Krommes, JA Kolesnikov, RA TI Hamiltonian description of convective-cell generation SO PHYSICS OF PLASMAS LA English DT Article ID DRIFT-WAVE TURBULENCE; ZONAL FLOW SATURATION; DYNAMICS; SYSTEMS; FLUID AB The nonlinear statistical growth rate gamma(q) for convective cells driven by drift-wave (DW) interactions is studied with the aid of a covariant Hamiltonian formalism for the gyrofluid nonlinearities. A statistical energy theorem is proven that relates gamma(q) to a second functional tensor derivative of the DW energy. This generalizes to a wide class of systems of coupled partial differential equations a previous result for scalar dynamics. Applications to (i) electrostatic ion-temperature-gradient-driven modes at small ion temperature, and (ii) weakly electromagnetic collisional DWs are noted. (C) 2004 American Institute of Physics. C1 Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Krommes, JA (reprint author), Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM krommes@princeton.edu NR 15 TC 17 Z9 17 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JUN PY 2004 VL 11 IS 6 BP L29 EP L32 DI 10.1063/1.1719014 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 822KW UT WOS:000221539300001 ER PT J AU Crease, RP AF Crease, RP TI Dealing with Cassandras SO PHYSICS WORLD LA English DT Editorial Material C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. EM rcrease@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8585 J9 PHYS WORLD JI Phys. World PD JUN PY 2004 VL 17 IS 6 BP 16 EP 16 PG 1 WC Physics, Multidisciplinary SC Physics GA 838ES UT WOS:000222696900015 ER PT J AU Jia, Y Rutger, JN Wang, Z Singh, P Martin, R Pinson, SRM AF Jia, Y. Rutger, J. N. Wang, Z. Singh, P. Martin, R. Pinson, S. R. M. TI Development and characterization of rice mutant populations for functional genomics of host-parasite interactions SO PHYTOPATHOLOGY LA English DT Meeting Abstract C1 [Jia, Y.; Rutger, J. N.] USDA ARS, DB Natl Rice Res Ctr, Stuttgart, AR 72160 USA. [Wang, Z.] Zhejiang Wanli Univ, Hangzhou, Zhejiang, Peoples R China. [Singh, P.; Martin, R.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Pinson, S. R. M.] USDA ARS, Rice Res Unit, Beaumont, TX USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA SN 0031-949X J9 PHYTOPATHOLOGY JI Phytopathology PD JUN PY 2004 VL 94 IS 6 SU S BP S47 EP S47 PG 1 WC Plant Sciences SC Plant Sciences GA V44HJ UT WOS:000202993500315 ER PT J AU Posada-Buitrago, ML Boore, JL Frederick, RD AF Posada-Buitrago, M. L. Boore, J. L. Frederick, R. D. TI Analysis of expressed sequence tags in the soybean rust pathogen Phakopsora pachyrhizi at different stages of the infection process SO PHYTOPATHOLOGY LA English DT Meeting Abstract C1 [Posada-Buitrago, M. L.; Boore, J. L.] DOE JGI LBNL, Walnut Creek, CA USA. [Frederick, R. D.] USDA ARS, FDWSRU, Ft Detrick, MD USA. RI Moreira, Eder/B-2309-2010; POSADA, MARTHA/G-7927-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 USA SN 0031-949X J9 PHYTOPATHOLOGY JI Phytopathology PD JUN PY 2004 VL 94 IS 6 SU S BP S85 EP S85 PG 1 WC Plant Sciences SC Plant Sciences GA V44HJ UT WOS:000202993500580 ER PT J AU Maksimchuk, A Flippo, K Krause, H Mourou, G Nemoto, K Shultz, D Umstadter, D Vane, R Bychenkov, VY Dudnikova, GI Kovalev, VF Mima, K Novikov, VN Sentoku, Y Tolokonnikov, SV AF Maksimchuk, A Flippo, K Krause, H Mourou, G Nemoto, K Shultz, D Umstadter, D Vane, R Bychenkov, VY Dudnikova, GI Kovalev, VF Mima, K Novikov, VN Sentoku, Y Tolokonnikov, SV TI High-energy ion generation by short laser pulses SO PLASMA PHYSICS REPORTS LA English DT Article ID HIGH-INTENSITY LASER; 2 ELECTRON TEMPERATURES; SOLID TARGETS; PLASMA INTERACTIONS; PROTON GENERATION; RELATIVISTIC IONS; COLLIMATED BEAMS; DENSITY PLASMAS; MOIRE FRINGES; ACCELERATION AB This paper reviews the many recent advances at the Center for Ultrafast Optical Science (CUOS) at the University of Michigan in multi-MeV ion beam generation from the interaction of short laser pulses focused onto thin foil targets at intensities ranging from 10(17) to 10(19) W/cm(2). Ion beam characteristics were studied by changing the laser intensity, laser wavelength, target material, and by depositing a well-absorbed coating. We manipulated the proton beam divergence using shaped targets and observed nuclear transformation induced by high-energy protons and deuterons. Qualitative theoretical approaches and fully relativistic two-dimensional particle-in-cell simulations modeled energetic ion generation. Comparison with experiments sheds light on ion energy spectra for multi-species plasma, the dependences of ion-energy on preplasma scale length and solid density plasma thickness, and laser-triggered isotope yield. Theoretical predictions are also made with the aim of studying ion generation for high-power lasers with the energies expected in the near future, and for the relativistic intensity table-top laser, a prototype of which is already in operation at CUOS in the limits of several-cycle pulse duration and a single-wavelength spot size. (C) 2004 MAIK "Nauka/Interperiodica". C1 Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan. Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia. Russian Acad Sci, Inst Computat Technol, Siberian Branch, Novosibirsk 630090, Russia. Russian Acad Sci, Inst Math Modeling, Moscow 125047, Russia. Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan. Gen Atom Co, San Diego, CA 92186 USA. IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123812, Russia. RP Maksimchuk, A (reprint author), Univ Michigan, Ctr Ultrafast Opt Sci, Ann Arbor, MI 48109 USA. RI Tolokonnikov, Sergey/L-3427-2013; Bychenkov, Valery/M-3715-2015; Umstadter, Donald/A-1581-2016; Flippo, Kirk/C-6872-2009; Mima, Kunioki/H-9014-2016; Sentoku, Yasuhiko/P-5419-2014 OI Bychenkov, Valery/0000-0001-9624-3813; Umstadter, Donald/0000-0002-2182-4346; Flippo, Kirk/0000-0002-4752-5141; NR 67 TC 54 Z9 56 U1 1 U2 8 PU MAIK NAUKA/INTERPERIODICA PUBL PI MELVILLE PA C/O AMERICAN INST PHYSICS, 2 HUNTINGTON QUANDRANGLE, STE 1NO1, MELVILLE, NY 11747-4502 USA SN 1063-780X J9 PLASMA PHYS REP+ JI Plasma Phys. Rep. PD JUN PY 2004 VL 30 IS 6 BP 473 EP 495 DI 10.1134/1.1768582 PG 23 WC Physics, Fluids & Plasmas SC Physics GA 848BC UT WOS:000223441000002 ER PT J AU Prokisch, H Scharfe, C Camp, DG Xiao, WZ David, L Andreoli, C Monroe, ME Moore, RJ Gritsenko, MA Kozany, C Hixson, KK Mottaz, HM Zischka, H Ueffing, M Herman, ZS Davis, RW Meitinger, T Oefner, PJ Smith, RD Steinmetz, LM AF Prokisch, H Scharfe, C Camp, DG Xiao, WZ David, L Andreoli, C Monroe, ME Moore, RJ Gritsenko, MA Kozany, C Hixson, KK Mottaz, HM Zischka, H Ueffing, M Herman, ZS Davis, RW Meitinger, T Oefner, PJ Smith, RD Steinmetz, LM TI Integrative analysis of the mitochondrial proteome in yeast SO PLOS BIOLOGY LA English DT Article ID SACCHAROMYCES-CEREVISIAE; MASS-SPECTROMETRY; GLOBAL ANALYSIS; SYSTEMATIC IDENTIFICATION; SUBCELLULAR-LOCALIZATION; PROTEINS; DATABASE; EXPRESSION; SCALE; COMPLEXES AB In this study yeast mitochondria were used as a model system to apply, evaluate, and integrate different genomic approaches to define the proteins of an organelle. Liquid chromatography mass spectrometry applied to purified mitochondria identified 546 proteins. By expression analysis and comparison to other proteome studies, we demonstrate that the proteomic approach identifies primarily highly abundant proteins. By expanding our evaluation to other types of genomic approaches, including systematic deletion phenotype screening, expression profiling, subcellular localization studies, protein interaction analyses, and computational predictions, we show that an integration of approaches moves beyond the limitations of any single approach. We report the success of each approach by benchmarking it against a reference set of known mitochondrial proteins, and predict approximately 700 proteins associated with the mitochondrial organelle from the integration of 22 datasets. We show that a combination of complementary approaches like deletion phenotype screening and mass spectrometry can identify over 75% of the known mitochondrial proteome. These findings have implications for choosing optimal genome-wide approaches for the study of other cellular systems, including organelles and pathways in various species. Furthermore, our systematic identification of genes involved in mitochondrial function and biogenesis in yeast expands the candidate genes available for mapping Mendelian and complex mitochondrial disorders in humans. C1 GSF, Inst Human Genet, Natl Res Ctr Environm & Hlth, Neuherberg, Germany. Tech Univ Munich, Inst Human Genet, Munich, Germany. Stanford Genome Technol Ctr, Stanford, CA USA. Stanford Univ, Dept Biochem, Stanford, CA 94305 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. RP Steinmetz, LM (reprint author), GSF, Inst Human Genet, Natl Res Ctr Environm & Hlth, Neuherberg, Germany. EM lars.steinmetz@embl.de RI Smith, Richard/J-3664-2012; David, Lior/G-8754-2012; Prokisch, Holger/N-8964-2013; Meitinger, Thomas/O-1318-2015; Oefner, Peter/K-1116-2016; OI Smith, Richard/0000-0002-2381-2349; David, Lior/0000-0002-6555-0594; Oefner, Peter/0000-0002-1499-3977; Steinmetz, Lars/0000-0002-3962-2865; xiao, wenzhong/0000-0003-4944-6380 FU NIGMS NIH HHS [GM62119, GM63883, R01 GM063883, U54 GM062119] NR 40 TC 132 Z9 143 U1 2 U2 8 PU PUBLIC LIBRARY SCIENCE PI SAN FRANCISCO PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA SN 1545-7885 J9 PLOS BIOL JI PLoS. Biol. PD JUN PY 2004 VL 2 IS 6 BP 795 EP 804 AR e160 DI 10.1371/journal.pbio.0020160 PG 10 WC Biochemistry & Molecular Biology; Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics GA 833ZN UT WOS:000222380400019 PM 15208715 ER PT J AU Fraser, HB Hirsh, AE Giaever, G Kumm, J Eisen, MB AF Fraser, HB Hirsh, AE Giaever, G Kumm, J Eisen, MB TI Noise minimization in eukaryotic gene expression SO PLOS BIOLOGY LA English DT Article ID SACCHAROMYCES-CEREVISIAE; PROTEIN COMPLEXES; EVOLUTION; YEAST; DISPENSABILITY; NETWORKS AB All organisms have elaborate mechanisms to control rates of protein production. However, protein production is also subject to stochastic fluctuations, or "noise." Several recent studies in Saccharomyces cerevisiae and Escherichia coli have investigated the relationship between transcription and translation rates and stochastic fluctuations in protein levels, or more generally, how such randomness is a function of intrinsic and extrinsic factors. However, the fundamental question of whether stochasticity in protein expression is generally biologically relevant has not been addressed, and it remains unknown whether random noise in the protein production rate of most genes significantly affects the fitness of any organism. We propose that organisms should be particularly sensitive to variation in the protein levels of two classes of genes: genes whose deletion is lethal to the organism and genes that encode subunits of multiprotein complexes. Using an experimentally verified model of stochastic gene expression in S. cerevisiae, we estimate the noise in protein production for nearly every yeast gene, and confirm our prediction that the production of essential and complex-forming proteins involves lower levels of noise than does the production of most other genes. Our results support the hypothesis that noise in gene expression is a biologically important variable, is generally detrimental to organismal fitness, and is subject to natural selection. C1 Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Stanford Univ, Dept Biol Sci, Stanford, CA 94305 USA. Stanford Genome Technol Ctr, Stanford, CA USA. Lawrence Berkeley Natl Lab, Genome Sci Dept, Genom Div, Berkeley, CA USA. RP Fraser, HB (reprint author), Univ Calif Berkeley, Dept Mol & Cell Biol, 229 Stanley Hall, Berkeley, CA 94720 USA. EM hunter@ocf.berkeley.edu OI Eisen, Michael/0000-0002-7528-738X NR 23 TC 221 Z9 223 U1 5 U2 15 PU PUBLIC LIBRARY SCIENCE PI SAN FRANCISCO PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA SN 1545-7885 J9 PLOS BIOL JI PLoS. Biol. PD JUN PY 2004 VL 2 IS 6 BP 834 EP 838 AR e137 DI 10.1371/journal.pbio.0020137 PG 5 WC Biochemistry & Molecular Biology; Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics GA 833ZN UT WOS:000222380400022 PM 15124029 ER PT J AU Imanishi, T Itoh, T Suzuki, Y O'Donovan, C Fukuchi, S Koyanagi, KO Barrero, RA Tamura, T Yamaguchi-Kabata, Y Tanino, M Yura, K Miyazaki, S Ikeo, K Homma, K Kasprzyk, A Nishikawa, T Hirakawa, M Thierry-Mieg, J Thierry-Mieg, D Ashurst, J Jia, LB Nakao, M Thomas, MA Mulder, N Karavidopoulou, Y Jin, LH Kim, S Yasuda, T Lenhard, B Eveno, E Suzuki, Y Yamasaki, C Takeda, J Gough, C Hilton, P Fujii, Y Sakai, H Tanaka, S Amid, C Bellgard, M Bonaldo, MD Bono, H Bromberg, SK Brookes, AJ Bruford, E Carninci, P Chelala, C Couillault, C de Souza, SJ Debily, MA Devignes, MD Dubchak, I Endo, T Estreicher, A Eyras, E Fukami-Kobayash, K Gopinath, GR Graudens, E Hahn, Y Han, M Han, ZG Hanada, K Hanaoka, H Harada, E Hashimoto, K Hinz, U Hirai, M Hishiki, T Hopkinson, I Imbeaud, S Inoko, H Kanapin, A Kaneko, Y Kasukawa, T Kelso, J Kersey, P Kikuno, R Kimura, K Korn, B Kuryshev, V Makalowska, I Makino, T Mano, S Mariage-Samson, R Mashima, J Matsuda, H Mewes, HW Minoshima, S Nagai, K Nagasaki, H Nagata, N Nigam, R Ogasawara, O Ohara, O Ohtsubo, M Okada, N Okido, T Oota, S Ota, M Ota, T Otsuki, T Piatier-Tonneau, D Poustka, A Ren, SX Saitou, N Sakai, K Sakamoto, S Sakate, R Schupp, I Servant, F Sherry, S Shiba, R Shimizu, N Shimoyama, M Simpson, AJ Soares, B Steward, C Suwa, M Suzuki, M Takahashi, A Tamiya, G Tanaka, H Taylor, T Terwilliger, JD Unneberg, P Veeramachaneni, V Watanabe, S Wilming, L Yasuda, N Yoo, HS Stodolsky, M Makalowski, W Go, M Nakai, K Takagi, T Kanehisa, M Sakaki, Y Quackenbush, J Okazaki, Y Hayashizaki, Y Hide, W Chakraborty, R Nishikawa, K Sugawara, H Tateno, Y Chen, Z Oishi, M Tonellato, P Apweiler, R Okubo, K Wagner, L Wiemann, S Strausberg, RL Isogai, T Auffray, C Nomura, N Gojobori, T Sugano, S AF Imanishi, T Itoh, T Suzuki, Y O'Donovan, C Fukuchi, S Koyanagi, KO Barrero, RA Tamura, T Yamaguchi-Kabata, Y Tanino, M Yura, K Miyazaki, S Ikeo, K Homma, K Kasprzyk, A Nishikawa, T Hirakawa, M Thierry-Mieg, J Thierry-Mieg, D Ashurst, J Jia, LB Nakao, M Thomas, MA Mulder, N Karavidopoulou, Y Jin, LH Kim, S Yasuda, T Lenhard, B Eveno, E Suzuki, Y Yamasaki, C Takeda, J Gough, C Hilton, P Fujii, Y Sakai, H Tanaka, S Amid, C Bellgard, M Bonaldo, MD Bono, H Bromberg, SK Brookes, AJ Bruford, E Carninci, P Chelala, C Couillault, C de Souza, SJ Debily, MA Devignes, MD Dubchak, I Endo, T Estreicher, A Eyras, E Fukami-Kobayash, K Gopinath, GR Graudens, E Hahn, Y Han, M Han, ZG Hanada, K Hanaoka, H Harada, E Hashimoto, K Hinz, U Hirai, M Hishiki, T Hopkinson, I Imbeaud, S Inoko, H Kanapin, A Kaneko, Y Kasukawa, T Kelso, J Kersey, P Kikuno, R Kimura, K Korn, B Kuryshev, V Makalowska, I Makino, T Mano, S Mariage-Samson, R Mashima, J Matsuda, H Mewes, HW Minoshima, S Nagai, K Nagasaki, H Nagata, N Nigam, R Ogasawara, O Ohara, O Ohtsubo, M Okada, N Okido, T Oota, S Ota, M Ota, T Otsuki, T Piatier-Tonneau, D Poustka, A Ren, SX Saitou, N Sakai, K Sakamoto, S Sakate, R Schupp, I Servant, F Sherry, S Shiba, R Shimizu, N Shimoyama, M Simpson, AJ Soares, B Steward, C Suwa, M Suzuki, M Takahashi, A Tamiya, G Tanaka, H Taylor, T Terwilliger, JD Unneberg, P Veeramachaneni, V Watanabe, S Wilming, L Yasuda, N Yoo, HS Stodolsky, M Makalowski, W Go, M Nakai, K Takagi, T Kanehisa, M Sakaki, Y Quackenbush, J Okazaki, Y Hayashizaki, Y Hide, W Chakraborty, R Nishikawa, K Sugawara, H Tateno, Y Chen, Z Oishi, M Tonellato, P Apweiler, R Okubo, K Wagner, L Wiemann, S Strausberg, RL Isogai, T Auffray, C Nomura, N Gojobori, T Sugano, S TI Integrative annotation of 21,037 human genes validated by full-length cDNA clones SO PLOS BIOLOGY LA English DT Review ID EXPRESSED SEQUENCE TAGS; SINGLE NUCLEOTIDE POLYMORPHISMS; COMPLETE GENOME SEQUENCE; FUNCTIONAL ANNOTATION; DROSOPHILA-MELANOGASTER; UNTRANSLATED REGIONS; HUNTINGTONS-DISEASE; MESSENGER-RNAS; LARGE PROTEINS; SUBCELLULAR-LOCALIZATION AB The human genome sequence defines our inherent biological potential; the realization of the biology encoded therein requires knowledge of the function of each gene. Currently, our knowledge in this area is still limited. Several lines of investigation have been used to elucidate the structure and function of the genes in the human genome. Even so, gene prediction remains a difficult task, as the varieties of transcripts of a gene may vary to a great extent. We thus performed an exhaustive integrative characterization of 41,118 full-length cDNAs that capture the gene transcripts as complete functional cassettes, providing an unequivocal report of structural and functional diversity at the gene level. Our international collaboration has validated 21,037 human gene candidates by analysis of high-quality full-length cDNA clones through curation using unified criteria. This led to the identification of 5,155 new gene candidates. It also manifested the most reliable way to control the quality of the cDNA clones. We have developed a human gene database, called the H-Invitational Database (H-InvDB; http://www.h-invitational.jp/). It provides the following: integrative annotation of human genes, description of gene structures, details of novel alternative splicing isoforms, non-protein-coding RNAs, functional domains, subcellular localizations, metabolic pathways, predictions of protein three-dimensional structure, mapping of known single nucleotide polymorphisms (SNPs), identification of polymorphic microsatellite repeats within human genes, and comparative results with mouse full-length cDNAs. The H-InvDB analysis has shown that up to 4% of the human genome sequence (National Center for Biotechnology Information build 34 assembly) may contain misassembled or missing regions. We found that 6.5% of the human gene candidates (1,377 loci) did not have a good protein-coding open reading frame, of which 296 loci are strong candidates for nonprotein-coding RNA genes. In addition, among 72,027 uniquely mapped SNPs and insertions/deletions localized within human genes, 13,215 nonsynonymous SNPs, 315 nonsense SNPs, and 452 indels occurred in coding regions. Together with 25 polymorphic microsatellite repeats present in coding regions, they may alter protein structure, causing phenotypic effects or resulting in disease. The H-InvDB platform represents a substantial contribution to resources needed for the exploration of human biology and pathology. C1 Natl Inst Adv Ind Sci & Technol, Integrated Database Grp, Biol Informat Res Ctr, Tokyo, Japan. Natl Inst Agrobiol Sci, Genome Res Dept, Bioinformat Lab, Ibaraki, Japan. Univ Tokyo, Inst Med Sci, Ctr Human Genome, Tokyo, Japan. EMBL Outstn, European Bioinformat Inst, Cambridge, England. Ctr Informat Biol, Shizuoka, Japan. DNA Data Bank Japan, Natl Inst Genet, Shizuoka, Japan. Nara Inst Sci & Technol, Nara, Japan. Integrated Database Grp, Japan Biol Informat Res Ctr, Japan Biol Informat Consortium, Tokyo, Japan. BITS Co, Shizuoka, Japan. Japan Atom Energy Res Inst, Quantum Bioinformat Grp, Ctr Promot Computat Sci & Engn, Kyoto, Japan. Reverse Proteom Res Inst, Chiba, Japan. Cent Res Lab, Tokyo, Japan. Kyoto Univ, Inst Chem Res, Bioinformat Ctr, Kyoto, Japan. NIH, Natl Ctr Biotechnol Informat, Natl Lib Med, Bethesda, MD USA. CNRS, Lab Phys Math, Montpellier, France. Wellcome Trust Sanger Inst, Cambridge, England. NCI, NIH, Bethesda, MD USA. Idaho State Univ, Dept Biol Sci, Pocatello, ID USA. Korea Res Inst Biosci & Biotechnolc, Taejeon, South Korea. Karolinska Inst, Ctr Genom & Bioinformat, Stockholm, Sweden. CNRS, Genexpress, Villejuif, France. Sino French Lab Life Sci & Genom, Shanghai, Peoples R China. Kyowa Hakko Kogyo Co Ltd, Tokyo Res Labs, Tokyo, Japan. GSF Natl Res Ctr Environm & Hlth, MIPS Inst Bioinformat, Neuherberg, Germany. Murdoch Univ, Sch Informat Technol, Ctr Bioinformat & Biol Comp, Murdoch, WA, Australia. Univ Iowa, Med Educ & Biomed Res Facil, Iowa City, IA USA. RIKEN Yokohama Inst, RIKEN Genom Sci Ctr, Genome Explorat Res Grp, Kanagawa, Japan. Med Coll Wisconsin, Milwaukee, WI USA. UCL, HUGO Gene Nomenclature Comm, London, England. RIKEN, Genome Sci Lab, Saitama, Japan. Ludwig Inst Canc Res, Sao Paulo, Brazil. CNRS, Vandoeuvre Les Nancy, France. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Tokyo Med & Dent Univ, Med Res Inst, Dept Bioinformat, Tokyo, Japan. Swiss Inst Bioinformat, Geneva, Switzerland. RIKEN Tsukuba Inst, RIKEN Bioresource Ctr, Bioresource Informat Div, Ibaraki, Osaka, Japan. Cold Spring Harbor Lab, Genome Knowledgebase, Cold Spring Harbor, NY USA. Chinese Natl Human Genome Ctr Shanghai, Shanghai, Peoples R China. Natl Inst Infect Dis, Div Genet Resources, Tokyo, Japan. Univ Tokyo, Dept Integrated Biosci, Grad Sch Frontier Sci, Chiba, Japan. Natl Inst Adv Ind Sci & Technol, Biol Informat Res Ctr, Funct Genom Grp, Tokyo, Japan. UCL, Royal Free Univ Coll Med Sch, Dept Primary Care & Populat Sci, London, England. Inst Child Hlth, Clin & Mol Genet Unit, London, England. Tokai Univ, Sch Med, Div Mol Life Sci, Dept Genet Informat, Kanagawa, Japan. Univ Western Cape, South African Natl Bioinformat Inst, Bellville, South Africa. Kazusa DNA Res Inst, Chiba, Japan. RZPD Resource Ctr Genome Res, Heidelberg, Germany. German Canc Res Ctr, Heidelberg, Germany. Penn State Univ, University Pk, PA USA. Osaka Univ, Grad Sch Informat Sci & Technol, Dept Bioinformat Engn, Osaka, Japan. Hamamatsu Univ Sch Med, Photon Med Res Ctr, Med Photobiol Dept, Shizuoka, Japan. Natl Inst Adv Ind Sci & Technol, Computat Biol Res Ctr, Tokyo, Japan. Keio Univ, Sch Med, Dept Mol Biol, Tokyo, Japan. Tokyo Inst Technol, Grad Sch Biosci & Biotechnol, Dept Biol Sci, Kanagawa, Japan. Tokyo Inst Technol, Global Sci Informat & Comp Ctr, Tokyo, Japan. Taisho Pharmaceut Co, Med Res Labs, Mol Biol Lab, Saitama, Japan. Natl Inst Genet, Dept Populat Genet, Shizuoka, Japan. RIKEN Yokohama Inst, Genom Sci Ctr, Human Genome Res Grp, Kanagawa, Japan. Columbia Univ, New York, NY USA. Columbia Genome Ctr, New York, NY USA. KTH Royal Sch Technol, Dept Biotechnol, Stockholm, Sweden. USDA, Biol Div, Washington, DC USA. USDA, Genome Task Grp, Off Biol & Environm Res, Washington, DC USA. Nagahama Inst Biosci & Technol, Fac Biosci, Nagahama, Shiga, Japan. Inst Genom Res, Rockville, MD USA. Univ Cincinnati, Dept Environm Hlth, Ctr Genome Informat, Cincinnati, OH USA. Shanghai Med Univ 2, Rui Jin Hosp, Shanghai Inst Hematol, State Key Lab Med Genom, Shanghai, Peoples R China. PointOne Syst, Wauwatosa, WI USA. Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki, Japan. Grad Univ Adv Studies, Dept Genet, Shizuoka, Japan. Univ Tokyo, Grad Sch Frontier Sci, Dept Med Genome Sci, Tokyo, Japan. RP Natl Inst Adv Ind Sci & Technol, Integrated Database Grp, Biol Informat Res Ctr, Tokyo, Japan. EM tgojobor@genes.nig.ac.jp RI Taylor, Todd/A-7121-2009; Nakai, Kenta/B-7293-2009; Jun-ichi, Takeda/I-7483-2014; Kasukawa, Takeya/N-5070-2015; Eyras, Eduardo/A-1560-2010; Hide, Winston Hide/C-7217-2009; Ohara, Osamu/A-9119-2012; Koyanagi, Kanako/D-6354-2012; Thomas, Michael/B-7489-2008; Kanapin, Alexander/E-7632-2013; Carninci, Piero/K-1568-2014; Eyras, Eduardo/L-1053-2014; Wiemann, Stefan/E-4424-2013; Ohara, Osamu/G-5448-2015; Makalowski, Wojciech/I-2843-2016; Kanapin, Alexander/Q-7590-2016; Paulini, Michael/E-8289-2017; THIERRY-MIEG, Jean/F-1975-2017; OI Bono, Hidemasa/0000-0003-4413-0651; Taylor, Todd/0000-0003-4247-6253; Nakai, Kenta/0000-0002-8721-8883; Jun-ichi, Takeda/0000-0001-5367-5608; Kasukawa, Takeya/0000-0001-5085-0802; Hide, Winston Hide/0000-0002-8621-3271; Koyanagi, Kanako/0000-0003-1615-5077; Thomas, Michael/0000-0003-2982-0291; Carninci, Piero/0000-0001-7202-7243; Eyras, Eduardo/0000-0003-0793-6218; Wiemann, Stefan/0000-0003-4683-3174; Ohara, Osamu/0000-0002-3328-9571; Kanapin, Alexander/0000-0001-9802-5297; Paulini, Michael/0000-0002-6968-2340; THIERRY-MIEG, Jean/0000-0002-0396-6789; Apweiler, Rolf/0000-0001-7078-200X; Wilming, Laurens/0000-0002-4154-7358; Amid, Clara/0000-0001-6534-7425; Bruford, Elspeth/0000-0002-8380-5247; Kersey, Paul/0000-0002-7054-800X; Lenhard, Boris/0000-0002-1114-1509; chelala, claude/0000-0002-2488-0669; Devignes, Marie-Dominique/0000-0002-0399-8713; O'Donovan, Claire/0000-0001-8051-7429 FU NHLBI NIH HHS [R01 HL064541] NR 116 TC 243 Z9 258 U1 2 U2 21 PU PUBLIC LIBRARY SCIENCE PI SAN FRANCISCO PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA SN 1545-7885 J9 PLOS BIOL JI PLoS. Biol. PD JUN PY 2004 VL 2 IS 6 BP 856 EP 875 AR e162 DI 10.1371/journal.pbio.0020162 PG 20 WC Biochemistry & Molecular Biology; Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics GA 833ZN UT WOS:000222380400025 PM 15103394 ER PT J AU Kasili, PM Vo-Dinh, T AF Kasili, PM Vo-Dinh, T TI Detection of polycyclic aromatic compounds in single living cells using optical nanoprobes SO POLYCYCLIC AROMATIC COMPOUNDS LA English DT Article DE antibody; benzo[a]pyrene; nanoprobe; single cell ID IMMOBILIZED ANTIBODIES; NANOSENSORS; BINDING; DNA AB Exposure of mammalian cells to polycyclic aromatic compounds (PACs) such as the carcinogen benzo[a]pyrene (BaP) leads to the formation of DNA adducts N-2-deoxyguanosine (dG) and N-6-deoxyadenosine (dA) with adenine and guanine nucleotides, which are integral parts of DNA, RNA, and ATP. DNA adduct formation causes alteration. of the DNA (RNA) sequence since neither adenine nor guanine can normally bind to its complementary nucleotide base, thymine (uracil) and cytosine respectively. The inability to form these bonds leads to mutations in the DNA double-helix structure during DNA replication, and eventually carcinogenesis. Therefore, the capability to detect and measure PAC species such as BaP in single living cells is important for studies required to establish the limits of BaP exposure necessary for carcinogenesis. Along these lines, we have developed antibody-based optical nanoprobes capable of detecting and measuring BaP in single living cells. The results obtained in this work demonstrate the practical application of antibody-based nanoprobes for performing measurements inside single living cells with their elements and their relationships intact. C1 Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, POB 2008, Oak Ridge, TN 37831 USA. EM vodinht@ornl.gov NR 16 TC 3 Z9 3 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1040-6638 J9 POLYCYCL AROMAT COMP JI Polycycl. Aromat. Compd. PD JUN-JUL PY 2004 VL 24 IS 3 BP 221 EP 235 DI 10.1080/10406630490460700 PG 15 WC Chemistry, Organic SC Chemistry GA 836YU UT WOS:000222593300006 ER PT J AU Zhang, HW Hong, K Mays, JW AF Zhang, HW Hong, K Mays, JW TI First report of nitroxide mediated polymerization in an ionic liquid SO POLYMER BULLETIN LA English DT Article ID FREE-RADICAL POLYMERIZATION; FRAGMENTATION CHAIN-TRANSFER; METHYL-METHACRYLATE; STYRENE AB Nitroxide-mediated free radical polymerizations (NMP) of styrene (St) and methyl methacrylate (MMA) were carried out in a room temperature ionic liquid: 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6). A bimolecular initiation system, benzoyl peroxide (BPO) along with 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and a unimolecular initiation system, 2,2,5-trimethyl-3-(1-phenylethoxy)-4-phenyl-3-azahexane (alpha-hydrido alkoxyamine, TMPPAH)) were employed. Contrary to the results obtained for atom transfer radical polymerization (ATRP) and reversible addition-fragmentation radical transfer polymerization (RAFT) in the same ionic liquid, the molecular weights obtained in NMP were lower with broader polydispersities for a wide range of initiator ratios and temperatures due to the nonliving nature of polymerization. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RP Zhang, HW (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. EM jimmymays@utk.edu RI Hong, Kunlun/E-9787-2015 OI Hong, Kunlun/0000-0002-2852-5111 NR 28 TC 32 Z9 33 U1 0 U2 5 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0170-0839 J9 POLYM BULL JI Polym. Bull. PD JUN PY 2004 VL 52 IS 1 BP 9 EP 16 DI 10.1007/s00289-004-0248-2 PG 8 WC Polymer Science SC Polymer Science GA 832AL UT WOS:000222239200002 ER PT J AU Gillen, KT Assink, RA Bernstein, R AF Gillen, KT Assink, RA Bernstein, R TI Condition monitoring approaches applied to a polychloroprene cable jacketing material SO POLYMER DEGRADATION AND STABILITY LA English DT Article DE aging; polychloroprene condition monitoring; modulus; NMR relaxation; solvent uptake; swelling ID DIFFUSION-LIMITED OXIDATION; THERMAL-DEGRADATION; TIME DEVELOPMENT; EXTRAPOLATION; INDENTATION; INSULATION; ARRHENIUS; POLYMERS; PROFILES; SAMPLES AB In this paper we examine the utility of several promising material condition monitoring (CM) techniques applied to a commercial polychloroprene cable jacketing material used in nuclear power plant applications. These include two relatively unknown approaches, cross-sectional modulus profiling and NMR T-2 relaxation time measurements of solvent-swelled samples, as well as three more commonly used approaches, density, gel fraction and solvent uptake. The results from each approach were compared to tensile elongation measurements, the usual standard approach for monitoring degradation of elastomers. Degradation was carried out at three temperatures and at four combined radiation plus thermal environments, all of which were selected (by theoretical modeling and later confirmed by cross-sectional degradation mapping) such that oxidation proceeded uniformly throughout the cross-section of the material. This allowed macroscopic condition monitoring measurements to be made in the absence of anomalous diffusion-limited oxidation effects. Of the techniques examined, modulus profiling, solvent uptake and NNIR T-2 measurements correlated extremely well with the elongation measurements and therefore showed substantial potential as CM approaches for this material. This is not unexpected since all of these techniques are sensitive to crosslinking of the material and the deterioration of the elongation is itself dominated by material hardening and thus by crosslinking. Published by Elsevier Ltd. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Gillen, KT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM ktgille@sandia.gov NR 28 TC 14 Z9 14 U1 1 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0141-3910 J9 POLYM DEGRAD STABIL JI Polym. Degrad. Stabil. PD JUN PY 2004 VL 84 IS 3 BP 419 EP 431 DI 10.1016/j.polymdegradstab.2004.01.018 PG 13 WC Polymer Science SC Polymer Science GA 830LC UT WOS:000222122600008 ER PT J AU Wilson, KV Smith, BL Macdonald, JM Schoonover, JR Castro, JM Smith, ME Cournoyer, ME Marx, R Steckle, WP AF Wilson, KV Smith, BL Macdonald, JM Schoonover, JR Castro, JM Smith, ME Cournoyer, ME Marx, R Steckle, WP TI Physio-chemical degradation of thermally aged hypalon glove samples SO POLYMER DEGRADATION AND STABILITY LA English DT Article DE chlorosulfonated polyethylene; hypalon; thermal aging; thermal degradation; FTIR-ATR ID CHLOROSULFONATED-POLYETHYLENE; AGING DATA; PECULIARITIES; RUBBER; BLENDS; IRRADIATION; OXIDATION; BEHAVIOR; POLYMER AB Attenuated total reflection (ATR) infrared spectra have been analyzed using multivariate curve resolution (MCR) to capture the chemistry of the thermal degradation in the aging of chlorosulfonated polyethylene (Hypalon(R)) glove samples. The analysis demonstrates the primary degradation pathways to be oxidation (formation of ketones and carboxylic acids), dehydrochlorination with formation of -C=C- groups, and polymer crosslinking with changes in the C-H functional groups. From the multivariate analysis, the dominant degradation pathway involves carbon-carbon double bond formation and oxidation to form ketones. The tensile properties (modulus and elongation at break) demonstrate stiffening of the material with aging time. The dynamic mechanical data show that the storage modulus and mechanical loss tangent are also strongly affected with aging due to a hardening of the material. Taken together the mechanical and ATR data indicate that in thermal aging hypalon degrades by dehydrochlorination and loss of SO2Cl functionality with -C=C- formation, oxidation, and crosslinking causing the material to harden and become brittle. Published by Elsevier Ltd. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Nucl Mat & Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Hlth Safety & Radiat Protect Div, Los Alamos, NM 87545 USA. RP Wilson, KV (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663,MS E549, Los Alamos, NM 87545 USA. EM kvw@lanl.gov NR 20 TC 6 Z9 6 U1 1 U2 9 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0141-3910 J9 POLYM DEGRAD STABIL JI Polym. Degrad. Stabil. PD JUN PY 2004 VL 84 IS 3 BP 439 EP 449 DI 10.1016/j.polymdegradstab.2004.01.002 PG 11 WC Polymer Science SC Polymer Science GA 830LC UT WOS:000222122600010 ER PT J AU Goehner, RP Michael, JR AF Goehner, RP Michael, JR TI Microdiffraction phase identification in the scanning electron microscope (SEM) SO POWDER DIFFRACTION LA English DT Article ID BACKSCATTER DIFFRACTION; KIKUCHI PATTERNS AB The identification of crystallographic phases in the scanning electron microscope (SEM) has been limited by the lack of a simple way to obtain electron diffraction data of an unknown while observing the microstructure of the specimen. With the development of charge coupled device (CCD)-based detectors, backscattered electron Kikuchi patterns, alternately referred to as electron backscattered diffraction (EBSD) patterns, can be easily collected. Previously, EBSD has been limited to crystallographic orientation studies due to the poor pattern quality collected with video rate detector systems. With CCD detectors, a typical EBSD can now be acquired from a micron or submicron sized crystal using an exposure time of 1-10 s with an accelerating voltage of 10-40 kV and a beam current as low as 0.1 nA. Crystallographic phase analysis using EBSD is unique in that the properly equipped SEM permits high magnification images, EBSDs, and elemental information to be collected from bulk specimens. EBSD in the SEM has numerous advantages over other electron beam-based crystallographic techniques. The large angular view (similar to70degrees) provided by EBSD and the ease of specimen preparation are distinct advantages of the technique. No sample preparation beyond what is commonly used for SEM specimens is required for EBSD. (C) 2004 International Centre for Diffraction Data. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Goehner, RP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 18 TC 1 Z9 1 U1 2 U2 4 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD JUN PY 2004 VL 19 IS 2 BP 100 EP 103 DI 10.1154/1.1757450 PG 4 WC Materials Science, Characterization & Testing SC Materials Science GA 828OY UT WOS:000221983800002 ER PT J AU Havrilla, GJ Miller, T AF Havrilla, GJ Miller, T TI Micro X-ray fluorescence in materials characterization SO POWDER DIFFRACTION LA English DT Article AB Micro X-ray fluorescence (MXRF) offers the analyst a new approach to materials characterization. The range of applications is expanding rapidly. Single point analysis has been demonstrated for nanoliter volumes with detection limits at the 0.5 ng level. MXRF can be used as an element specific detector for capillary electrophoresis. Elemental imaging applications include analysis of sample corrosion and polymers, use as a combinatorial chemistry screening tool, and integration with molecular spectroscopic imaging methods to provide a more comprehensive characterization. Three-dimensional elemental imaging is a reality with the development of a confocal X-ray fluorescence microscope. Stereoview elemental X-ray imaging can provide unique views of materials that flat two-dimensional images cannot achieve. Spectral imaging offers chemical imaging capability, moving MXRF into a higher level of information content. The future is bright for MXRF as a materials characterization tool. (C) 2004 International Centre for Diffraction Data. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Havrilla, GJ (reprint author), Los Alamos Natl Lab, MS K484, Los Alamos, NM 87545 USA. EM havrilla@lanl.gov NR 14 TC 20 Z9 20 U1 0 U2 1 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD JUN PY 2004 VL 19 IS 2 BP 119 EP 126 DI 10.1154/1.1752947 PG 8 WC Materials Science, Characterization & Testing SC Materials Science GA 828OY UT WOS:000221983800005 ER PT J AU Botez, CE Stephens, PW Omotoso, O AF Botez, CE Stephens, PW Omotoso, O TI Crystal structure of dicalclum chromate hydrate SO POWDER DIFFRACTION LA English DT Article ID POWDER DIFFRACTION; TRICALCIUM SILICATE; HEXAVALENT CHROMIUM AB Direct methods and Rietveld analysis were applied to high-resolution synchrotron X-ray powder diffraction data to solve the crystal structure of dicalcium chromate hydrate (Ca2CrO5.3H(2)O). The compound crystallizes in monoclinic symmetry (space group Cm, Z=2), with a =8.23575(5) Angstrom, b=7.90302(4) Angstrom, c=5.20331(3) Angstrom, and beta=98.0137(3)degrees. The structure is built from double-layers of CrO4 tetrahedra and CaO8 polyhedra that run parallel to the (001) plane. (C) 2004 International Centre for Diffraction Data. C1 SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. Nat Resources Canada, Energy Technol Ctr, Devon, AB T9G 1A8, Canada. RP Botez, CE (reprint author), SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. EM botez@bnl.gov NR 18 TC 0 Z9 0 U1 0 U2 0 PU J C P D S-INT CENTRE DIFFRACTION DATA PI NEWTOWN SQ PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA SN 0885-7156 J9 POWDER DIFFR JI Powder Diffr. PD JUN PY 2004 VL 19 IS 2 BP 133 EP 136 DI 10.1154/1.1648316 PG 4 WC Materials Science, Characterization & Testing SC Materials Science GA 828OY UT WOS:000221983800007 ER PT J AU Venclovas, C Ginalski, K Kang, C AF Venclovas, C Ginalski, K Kang, C TI Sequence-structure mapping errors in the PDB: OB-fold domains SO PROTEIN SCIENCE LA English DT Article DE structure quality assessment; sequence register errors; sequence analysis; molecular modeling; X-ray crystallography; SSB protein; PDB ID DNA-BINDING-PROTEIN; X-RAY-DIFFRACTION; GENE-V PROTEIN; CRYSTAL-STRUCTURE; SELENOMETHIONYL PROTEIN; DATA-BANK; RESOLUTION; ALIGNMENT; PYROPHOSPHATASE; RECOGNITION AB The Protein Data Bank (PDB) is the single most important repository of structural data for proteins and other biologically relevant molecules. Therefore, it is critically important to keep the PDB data, as much as possible, error-free. In this study, we have analyzed PDB crystal structures possessing oligonucleotide/ oligosaccharide binding (OB)-fold, one of the highly populated folds, for the presence of sequence-structure mapping errors. Using energy-based structure quality assessment coupled with sequence analyses, we have found that there are at least five OB-structures in the PDB that have regions where sequences have been incorrectly mapped onto the structure. We have demonstrated that the combination of these computation techniques is effective not only in detecting sequence-structure mapping errors, but also in providing guidance to correct them. Namely, we have used results of computational analysis to direct a revision of X-ray data for one of the PDB entries containing a fairly inconspicuous sequence-structure mapping error. The revised structure has been deposited with the PDB. We suggest use of computational energy assessment and sequence analysis techniques to facilitate structure determination when homologs having known structure are available to use as a reference. Such computational analysis may be useful in either guiding the sequence- structure assignment process or verifying the sequence mapping within poorly defined regions. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. Inst Biotechnol, LT-2028 Vilnius, Lithuania. Univ Texas, SW Med Ctr Dallas, Dept Biochem, Dallas, TX 75390 USA. BioInfoBank Inst, PL-60744 Poznan, Poland. Washington State Univ, Sch Mol Biosci, Pullman, WA 99164 USA. RP Venclovas, C (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, L-448,POB 808, Livermore, CA 94551 USA. EM venclovas@llnl.gov NR 35 TC 7 Z9 7 U1 1 U2 2 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD JUN PY 2004 VL 13 IS 6 BP 1594 EP 1602 DI 10.1110/ps.04634604 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 823RN UT WOS:000221630900016 PM 15133161 ER PT J AU Pokkuluri, PR Londer, YY Duke, NEC Erickson, J Pessanha, M Salgueiro, CA Schiffer, M AF Pokkuluri, PR Londer, YY Duke, NEC Erickson, J Pessanha, M Salgueiro, CA Schiffer, M TI Structure of a novel c(7)-type three-heme cytochrome domain from a multidomain cytochrome c polymer SO PROTEIN SCIENCE LA English DT Article DE multiheme cytochrome c; cytochrome c(7); Geobacter metallireducens; Geobacter sulfurreducens; heme coordination in c-type cytochromes; protein structure ID DESULFOVIBRIO-VULGARIS HILDENBOROUGH; X-RAY-DIFFRACTION; ANGSTROM RESOLUTION; GEOBACTER-SULFURREDUCENS; TETRAHEME CYTOCHROME; CRYSTAL-STRUCTURE; DESULFURICANS NORWAY; C(3); PROTEIN; GIGAS AB The structure of a novel c(7)-type cytochrome domain that has two bis-histidine coordinated hemes and one heme with histidine, methionine coordination (where the sixth ligand is a methionine residue) was deter-mined at 1.7 Angstrom resolution. This domain is a representative of domains that form three polymers encoded by the Geobacter sulfurreducens genome. Two of these polymers consist of four and one protein of nine c(7)-type domains with a total of 12 and 27 hemes, respectively. Four individual domains (termed A, B C, and D) from one Such multiheme cytochrome c (ORF03300) were cloned and expressed in Escherichia coli. The domain C produced diffraction quality crystals from 2.4 M sodium malonate (pH 7). The Structure was solved by MAD method and refined to an R-factor of 19.5% and R-free of 21.8%. Unlike the two c(7) molecules with known structures, one from G. sulfurreducens (PpcA) and one from Desulfuromonas acetoxidans where all three hemes are bis-histidine coordinated, this domain contains a heme which is coordinated by a methionine and a histidine residue. As a result, the corresponding heme could have a higher potential than the other two hemes. The apparent midpoint reduction potential, E-app, of domain C is -105 mV, 50 mV higher than that of PpcA. C1 Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Univ Nova Lisboa, Inst Tecnol Quim & Biol, P-2780156 Oeiras, Portugal. Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, P-2825114 Monte De Caparica, Portugal. RP Schiffer, M (reprint author), Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM mschiffer@anl.gov RI Salgueiro, Carlos/A-4522-2013; REQUIMTE, SMB/M-5694-2013; REQUIMTE, UCIBIO/N-9846-2013 OI Salgueiro, Carlos/0000-0003-1136-809X; NR 40 TC 24 Z9 24 U1 2 U2 6 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD JUN PY 2004 VL 13 IS 6 BP 1684 EP 1692 DI 10.1110/ps.04626204 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 823RN UT WOS:000221630900025 PM 15133162 ER PT J AU Chen, SF Jancrick, J Yokota, H Kim, R Kim, SH AF Chen, SF Jancrick, J Yokota, H Kim, R Kim, SH TI Crystal structure of a protein associated with cell division from Mycoplasma pneumoniae (GI : 13508053): A novel fold with a conserved sequence motif SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article DE cell division; UPF0040 family; novel fold; structural genomics; GI 13508053 ID ESCHERICHIA-COLI; ESSENTIAL GENE; GENOME; CRYSTALLOGRAPHY; DATABASE AB UPF0040 is a family of proteins implicated in a cellular function of bacteria cell division. There is no structure information available on protein of this family. We have determined the crystal structure of a protein from Mycoplasma pneumoniae that belongs to this family using X-ray crystallography. Structural homology search reveals that this protein has a novel fold with no significant similarity to any proteins of known three-dimensional structure. The crystal structures of the protein in three different crystal forms reveal that the protein exists as a ring of octamer. The conserved protein residues, including a highly conserved DXXXR motif, are examined on the basis of crystal structure. (C) 2004 Wiley-Liss, Inc. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA USA. RP Kim, SH (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM shkim@lbl.gov FU NIGMS NIH HHS [GM 62412] NR 25 TC 12 Z9 13 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JUN 1 PY 2004 VL 55 IS 4 BP 785 EP 791 DI 10.1002/prot.10593 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 826AU UT WOS:000221802000001 PM 15146477 ER PT J AU Howard, EI Sanishvili, R Cachau, RE Mitschler, A Chevrier, B Barth, P Lamour, V Van Zandt, M Sibley, E Bon, C Moras, D Schneider, TR Joachimiak, A Podjarny, A AF Howard, EI Sanishvili, R Cachau, RE Mitschler, A Chevrier, B Barth, P Lamour, V Van Zandt, M Sibley, E Bon, C Moras, D Schneider, TR Joachimiak, A Podjarny, A TI Ultrahigh resolution drug design I: Details of interactions in human aldose reductase-inhibitor complex at 0.66 angstrom SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article DE X-ray crystallography; subatomic resolution; drug design; diabetes complications ID SITE-DIRECTED MUTAGENESIS; ATOMIC-RESOLUTION; CRYSTAL-STRUCTURE; DIABETIC COMPLICATIONS; BINDING-SITE; PROTEIN CRYSTALLOGRAPHY; ALDEHYDE REDUCTASE; ACTIVE-SITE; HOLOENZYME; MECHANISM AB The first subatomic resolution structure of a 36 kDa protein [aldose reductase (AR)] is presented. AR was cocrystallized at pH 5.0 with its cofactor NADP(+) and inhibitor IDD 594, a therapeutic candidate for the treatment of diabetic complications. X-ray diffraction data were collected up to 0.62 Angstrom resolution and treated up to 0.66 Angstrom resolution. Anisotropic refinement followed by a blocked matrix inversion produced low standard deviations (<0.005 Angstrom). The model was very well ordered overall (CA atoms' mean B factor is 5.5 Angstrom(2)). The model and the electron-density maps revealed fine features, such as H-atoms, bond densities, and significant deviations from standard stereochemistry. Other features, such as networks of hydrogen bonds (H bonds), a large number of multiple conformations, and solvent structure were also better defined. Most of the atoms in the active site region were extremely well ordered (mean B similar to3 Angstrom(2)), leading to the identification of the protonation states of the residues involved in catalysis. The electrostatic interactions of the inhibitor's charged carboxylate head with the catalytic residues and the charged coenzyme NADP(+) explained the inhibitor's noncompetitive character. Furthermore, a short contact involving the IDD 594 bromine atom explained the selectivity profile of the inhibitor, important feature to avoid toxic effects. The presented structure and the details revealed are instrumental for better understanding of the inhibition mechanism of AR by IDD 594, and hence, for the rational drug design of future inhibitors. This work demonstrates the capabilities of subatomic resolution experiments and stimulates further developments of methods allowing the use of the full potential of these experiments. (C) 2004 Wiley-Liss, Inc. C1 IGBMC, CNRS, UMR 7104, Lab Genom & Biol Struct, F-67404 Illkirch Graffenstaden, France. Argonne Natl Lab, Biosci Div, Struct Biol Ctr, Argonne, IL 60439 USA. NCI, SAIC, Adv Biomed Comp Ctr, Frederick, MD 21701 USA. ECPM, UMR 7509, Lab Geochim Biorgan, Strasbourg, France. Inst Diabet Discovery Inc, Branford, CT USA. Inst Pharmacol & Biol Struct, UMR5089, Toulouse, France. Univ Gothenburg, Dept Struct Chem, Gottingen, Germany. RP Podjarny, A (reprint author), IGBMC, CNRS, UMR 7104, Lab Genom & Biol Struct, BP 163, F-67404 Illkirch Graffenstaden, France. EM andrzejj@anl.gov; podjarny@igbme.u-strasbg.fr RI Schneider, Thomas/B-7442-2011 OI Schneider, Thomas/0000-0001-6955-7374 FU NCI NIH HHS [N01-CO-12400] NR 59 TC 182 Z9 184 U1 2 U2 21 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JUN 1 PY 2004 VL 55 IS 4 BP 792 EP 804 DI 10.1002/prot.20015 PG 13 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 826AU UT WOS:000221802000002 PM 15146478 ER PT J AU Spraggon, G Schwarzenbacher, R Kreusch, A Lee, CC Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chin, HJ Dai, XP Deacon, AM DiDonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Jaroszewski, L Karlak, C Klock, HE Koesema, E Kovarik, JS Kuhn, P Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Quijano, K Robb, A Stevens, RC van den Bedem, H Velasquez, J Vincent, J von Delft, F Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Lesley, SA Wilson, IA AF Spraggon, G Schwarzenbacher, R Kreusch, A Lee, CC Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chin, HJ Dai, XP Deacon, AM DiDonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Jaroszewski, L Karlak, C Klock, HE Koesema, E Kovarik, JS Kuhn, P Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Quijano, K Robb, A Stevens, RC van den Bedem, H Velasquez, J Vincent, J von Delft, F Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Lesley, SA Wilson, IA TI Crystal structure of an Udp-n-acetylmuramate-alanine ligase MurC (TM0231) from Thermotoga maritima at 2.3 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID PROTEIN MODELS; COMPLEXES C1 Scripps Res Inst, JCSG, La Jolla, CA 92037 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA USA. San Diego Supercomp Ctr, La Jolla, CA 92093 USA. Novartis Res Fdn, Genomics Inst, San Diego, CA 92121 USA. Novartis Res Fdn, Joint Ctr Struct Genomics, San Diego, CA 92121 USA. RP Wilson, IA (reprint author), Scripps Res Inst, JCSG, BCC206,10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM wilson@scripps.edu RI Godzik, Adam/A-7279-2009 OI Godzik, Adam/0000-0002-2425-852X FU NIGMS NIH HHS [P50 GM62411] NR 15 TC 17 Z9 18 U1 0 U2 20 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JUN 1 PY 2004 VL 55 IS 4 BP 1078 EP 1081 DI 10.1002/prot.20034 PG 4 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 826AU UT WOS:000221802000029 PM 15146505 ER PT J AU Liu, JY Yokota, H Kim, R Kim, SH AF Liu, JY Yokota, H Kim, R Kim, SH TI A conserved hypothetical protein from Mycoplasma genitalium shows structural homology to NusB proteins SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID ESCHERICHIA-COLI; TRANSCRIPTION ANTITERMINATION; LAMBDA; RNA; S10 C1 Lawrence Berkeley Lab, Struct Genomics Ctr, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Kim, SH (reprint author), Lawrence Berkeley Lab, Struct Genomics Ctr, Berkeley, CA 94720 USA. EM SHKim@cchem.berkeley.edu FU PHS HHS [62412] NR 22 TC 2 Z9 3 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JUN 1 PY 2004 VL 55 IS 4 BP 1082 EP 1086 DI 10.1002/prot.20119 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 826AU UT WOS:000221802000030 PM 15146506 ER PT J AU Tucker, JD Marples, B Ramsey, MJ Lutze-Mann, LH AF Tucker, JD Marples, B Ramsey, MJ Lutze-Mann, LH TI Persistence of chromosome aberrations in mice acutely exposed to Fe-56(+26) ions SO RADIATION RESEARCH LA English DT Article ID RADIATION-INDUCED TRANSLOCATIONS; ENERGY IRON IONS; HUMAN-LYMPHOCYTES; CHARGED-PARTICLES; PERIPHERAL-BLOOD; HUMAN-CELLS; HIGH-LET; IONIZING-RADIATION; CYTOGENETIC DAMAGE; HEAVY-PARTICLES AB Space exploration has the potential to yield exciting and significant discoveries, but it also brings with it many risks for flight crews. Among the less well studied of these are health effects from space radiation, which includes the highly charged, energetic particles of elements with high atomic numbers that constitute the galactic cosmic rays. In this study, we demonstrated that 1 Gy iron ions acutely administered to mice in vivo resulted in highly complex chromosome damage. We found that all types of aberrations, including dicentrics as well as translocations, insertions and acentric fragments, disappear rapidly with time after exposure, probably as a result of the death of heavily damaged cells, i.e. cells with multiple and/or complex aberrations. In addition, numerous cells have apparently simple exchanges as their only aberrations, and these cells appear to survive longer than heavily damaged cells. Eight weeks after exposure, the frequency of cells showing cytogenetic damage was reduced to less than 20% of the levels evident at I week, with little further decline apparent over an additional 8 weeks. These results indicate that exposure to 1 Gy iron ions produces heavily damaged cells, a small fraction of which appear to be capable of surviving for relatively long periods. The health effects of exposure to high-LET radiation in humans on prolonged space flights should remain a matter of concern. (C) 2004 by Radiation Research Society. C1 Wayne State Univ, Dept Biol Sci, Detroit, MI 48202 USA. Wayne State Univ, Hudson Webber Canc Res Ctr, Detroit, MI 48201 USA. Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. Univ New S Wales, Sch Biotechnol & Biomol Sci, Sydney, NSW 2052, Australia. RP Tucker, JD (reprint author), Wayne State Univ, Dept Biol Sci, 1360 Biol Sci Bldg, Detroit, MI 48202 USA. EM jtucker@biology.biosci.wayne.edu NR 58 TC 27 Z9 28 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 820 JORIE BOULEVARD, OAK BROOK, IL 60523 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD JUN PY 2004 VL 161 IS 6 BP 648 EP 655 DI 10.1667/RR3177 PG 8 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 824RC UT WOS:000221702700005 PM 15161355 ER PT J AU Heller, MC Keoleian, GA Mann, MK Volk, TA AF Heller, MC Keoleian, GA Mann, MK Volk, TA TI Life cycle energy and environmental benefits of generating electricity from willow biomass SO RENEWABLE ENERGY LA English DT Article DE energy crops; cofiring with coal; air emissions; global warming ID PERFORMANCE AB Biomass is a key renewable energy source expected to play an important role in US electricity production under stricter emission regulations and renewable portfolio standards. Willow energy crops are being developed in the northeast US as a fuel source for increasing biomass energy and bioproduct demands. A life cycle inventory is presented that characterizes the full cradle-to-grave energy and environmental performance of willow biomass-to-electricity. A willow biomass production model is developed using demonstration-scale field experience from New York. Scenarios are presented that mimic anticipated cofiring operations, including supplemental use of wood residues, at an existing coat-fired generating facility. At a cofiring rate of 10% biomass, the system net energy ratio (electricity delivered divided by total fossil fuel consumed) increases by 8.9% and net global warming potential decreases by 7-10%. Net SO2 emissions are reduced by 9.5% and a significant reduction in NO, emissions is expected. In addition, we estimate system performance of using willow biomass in dedicated biomass gasification and direct-fired generating facilities and demonstrate that the pollution avoided (relative to the current electricity-grid) is comparable to other renewables such as PV and wind. (C) 2003 Elsevier Ltd. All rights reserved. C1 Univ Michigan, Sch Nat Resources & Environm, Ctr Sustainable Syst, Ann Arbor, MI 48109 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. SUNY Coll Environm Sci & Forestry, Syracuse, NY 13210 USA. RP Keoleian, GA (reprint author), Univ Michigan, Sch Nat Resources & Environm, Ctr Sustainable Syst, 430 E Univ St, Ann Arbor, MI 48109 USA. EM gregak@umich.edu NR 34 TC 118 Z9 119 U1 2 U2 33 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0960-1481 J9 RENEW ENERG JI Renew. Energy PD JUN PY 2004 VL 29 IS 7 BP 1023 EP 1042 DI 10.1016/j.renene.2003.11.018 PG 20 WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels SC Science & Technology - Other Topics; Energy & Fuels GA 803VS UT WOS:000220259200002 ER PT J AU Agostini, P DiMauro, LF AF Agostini, P DiMauro, LF TI The physics of attosecond light pulses SO REPORTS ON PROGRESS IN PHYSICS LA English DT Review ID ORDER HARMONIC-GENERATION; ULTRASHORT LASER-PULSES; STIMULATED RAMAN-SCATTERING; REFRACTIVE-INDEX CONTROL; SHORT OPTICAL PULSES; SOFT X-RAYS; SUBFEMTOSECOND PULSES; RARE-GASES; THRESHOLD IONIZATION; MOLECULAR MODULATION AB The word 'attosecond' (1 as = 10(-18) s) officially entered the vocabulary of physics when sub-femtosecond pulses of UV/XUV light produced either by nonlinear frequency conversion of a ultra-short infrared pump pulse or Fourier synthesis of broad bandwidth radiation were established. The physics of these pulses is based on nonlinear, nonperturbative laser-atom interaction: stimulated Raman scattering or high harmonic generation (HHG) is used to generate the necessary bandwidth, which naturally encompasses the visible and UV/XUV spectral range. However, the crucial element for attosecond pulse generation is the control of the spectral phase. New methods of temporal. characterization at frequencies lying in the UV/XUV had to be elaborated. These methods rely on the energy/momentum analysis of photoelectrons produced by XUV attosecond flashes in the presence of an intense infrared field whose optical cycle itself becomes the basic clock. Single 650 as pulses have been produced and applied to trace the dynamics of electrons inside atoms following the creation of an inner-shell hole. Periodic combs of 250 as pulses have been synthesized by superposing just four harmonics and applying to the attosecond timing of the electron motion in HHG. Although it is easy to increase the bandwidth by coupling more harmonics, a fundamental limit to the duration of the light bursts produced has been discovered. It is imposed by the lack of synchronization of the different harmonic orders. The current limit is estimated to be 130 as. The latest advances include a direct autocorrelation of an attosecond pulse train and the production of a single 250 as soft x-ray pulse. This paper offers a snapshot of the state-of-the-art in the production and characterization of attosecond light pulses, with a glimpse at the first steps in attophysics. C1 CEA, Ctr Etud Saclay, F-91191 Gif Sur Yvette, France. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP CEA, Ctr Etud Saclay, F-91191 Gif Sur Yvette, France. EM pagostini@cea.fr NR 132 TC 550 Z9 564 U1 21 U2 153 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0034-4885 EI 1361-6633 J9 REP PROG PHYS JI Rep. Prog. Phys. PD JUN PY 2004 VL 67 IS 6 BP 813 EP 855 AR PII S0034-4885(04)36784-9 DI 10.1088/0034-4885/67/6/R01 PG 43 WC Physics, Multidisciplinary SC Physics GA 835DA UT WOS:000222459000001 ER PT J AU Adams, BW AF Adams, BW TI Using 15 fs, LINAC-generated electron bunches for naturally synchronized infrared pump x-ray probe experiments with coherent synchrotron radiation SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID TERAHERTZ RADIATION; PROPOSAL; LASER AB It is proposed to use highly compressed 15 fs bunches from a linear accelerator, such as the Stanford Linear Accelerator, for the production of both ultrashort x rays and mid-infrared coherent synchrotron radiation (CSR). The two types of radiation are synchronized with each other on the femtosecond time scale and can be used for pump-probe experiments in the study of ultrafast phenomena. A possible extension to 3 fs bunches is discussed, where the CSR serves both, as a source of pump radiation and as an indicator for those bunches that are perfectly compressed. (C) 2004 American Institute of Physics. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Adams, BW (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM adams@aps.anl.gov NR 17 TC 6 Z9 6 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUN PY 2004 VL 75 IS 6 BP 1982 EP 1987 DI 10.1063/1.1753099 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 825YC UT WOS:000221793800008 ER PT J AU Mobley, J Cullum, BM Wintenberg, AL Frank, SS Maples, RA Stokes, DL Vo-Dinh, T AF Mobley, J Cullum, BM Wintenberg, AL Frank, SS Maples, RA Stokes, DL Vo-Dinh, T TI Single-board computer based control system for a portable Raman device with integrated chemical identification SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID SYNCHRONOUS LUMINESCENCE; SPECTROSCOPY; BIOSENSOR; FILTERS; SENSORS AB We report the development of a battery-powered portable chemical identification device for field use consisting of an acousto-optic tunable filter (AOTF)-based Raman spectrometer with integrated data processing and analysis software. The various components and custom circuitry are integrated into a self-contained instrument by control software that runs on an embedded single-board computer (SBC), which communicates with the various instrument modules through a 48-line bidirectional TTL bus. The user interacts with the instrument via a touch-sensitive liquid crystal display unit (LCD) that provides soft buttons for user control as well as visual feedback (e.g., spectral plots, stored data, instrument settings, etc.) from the instrument. The control software manages all operational aspects of the instrument with the exception of the power management module that is run by embedded firmware. The SBC-based software includes both automated and manual library searching capabilities, permitting rapid identification of samples in the field. The use of the SBC in tandem with the LCD touchscreen for interfacing and control provides the instrument with a great deal of flexibility as its function can be customized to specific users or tasks via software modifications alone. The instrument, as currently configured, can be operated as a research-grade Raman spectrometer for scientific applications and as a "black-box" chemical identification system for field use. The instrument can acquire 198-point spectra over a spectral range of 238-1620 cm(-1), perform a library search, and display the results in less than 14 s. The operating modes of the instrument are demonstrated illustrating the utility and flexibility afforded the system by the SBC-LCD control module. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Engn Sci & Technol Div, Monolith Syst Grp, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. EM vodinht@ornl.gov NR 26 TC 9 Z9 9 U1 3 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUN PY 2004 VL 75 IS 6 BP 2016 EP 2023 DI 10.1063/1.1753670 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 825YC UT WOS:000221793800014 ER PT J AU Holman, KLM Latimer, MJ Yachandra, VK AF Holman, KLM Latimer, MJ Yachandra, VK TI Liquid helium cryostat with internal fluorescence detection for x-ray absorption studies in the 2-6 keV energy region SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID IN-VIVO; K-EDGE; EXAFS; SPECTROSCOPY; CELL; TRANSMISSION; SAMPLES; MODE AB X-ray absorption spectroscopy (XAS) in the intermediate x-ray region (2-6 keV) for dilute biological samples has been limited because of detector/flux limitations and inadequate cryogenic instrumentation. We have designed and constructed a new tailpiece/sample chamber for a commercially available liquid helium cooled cryostat which overcomes difficulties related to low fluorescence signals by using thin window materials and incorporating an internal photodiode detector. With the apparatus, XAS data at the Cl, S, and Ca K edges have been collected on frozen solutions and biological samples at temperatures down to 60 K. A separate chamber has been incorporated for collecting room-temperature spectra of standard compounds (for energy calibration purposes) which prevents contamination of the cryostat chamber and allows the sample to remain undisturbed, both important concerns for studying dilute and radiation-sensitive samples. (C) 2004 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Melvin Calvin Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Holman, KLM (reprint author), Willamette Univ, Dept Chem, Salem, OR 97301 USA. EM kholman@willamette.edu; latimer@ssrl.slac.stanford.edu; vkyachandra@lbl.gov FU NIGMS NIH HHS [R01 GM055302, R56 GM055302] NR 19 TC 0 Z9 0 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUN PY 2004 VL 75 IS 6 BP 2056 EP 2060 DI 10.1063/1.1753672 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 825YC UT WOS:000221793800020 PM 25057214 ER PT J AU Disdier, L Lerche, RA Bourgade, JL Glebov, VY AF Disdier, L Lerche, RA Bourgade, JL Glebov, VY TI Capillary detector with deuterated scintillator for inertial confinement fusion neutron images SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID LASER; TARGETS; DESIGN; RAY AB We demonstrate 325 mum spatial resolution in a 14 MeV neutron detector made with a capillary array filled with a deuterated liquid scintillator. A 10 mum source resolution in an image formed by 14 MeV neutrons is now achievable on a 25 m line-of-sight path for implosions at the Laser Mega Joule and the National Ignition Facilities. Analysis of penumbral and annular imaging techniques using this capillary array technology predicts good signal-to-noise ratios for images formed by targets yielding 10(15) neutrons or more. Experimental images of individual scattered recoil ions and measurement of their resulting light distributions are presented and are well understood. Neutron imaging of deuterium-filled capsules is also found to be feasible, based on the light-yield calibration of the neutron detector. (C) 2004 American Institute of Physics. C1 CEA, DAM Ile France, F-91680 Bruyeres Le Chatel, France. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. RP Disdier, L (reprint author), CEA, DAM Ile France, Boite Postale 12, F-91680 Bruyeres Le Chatel, France. EM laurent.disdier@cea.fr NR 18 TC 31 Z9 39 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUN PY 2004 VL 75 IS 6 BP 2134 EP 2139 DI 10.1063/1.1755443 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 825YC UT WOS:000221793800033 ER PT J AU Mriziq, KS Dai, HJ Dadmun, MD Jellison, GE Cochran, HD AF Mriziq, KS Dai, HJ Dadmun, MD Jellison, GE Cochran, HD TI High-shear-rate optical rheometer SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID 2-MODULATOR GENERALIZED ELLIPSOMETRY; LUBRICANT FILMS; BIREFRINGENCE; PRESSURE AB We have developed a parallel-plate rheometer in a magnetic-disk drive configuration constructed of optically transparent materials and operating with a very small gap for measurements at very high shear rates. The friction force at the disk-slider interface has been measured as a function of sliding speed while the film thickness was monitored in situ using a capacitance technique. The shear rate is calculated from the film thickness and the sliding speed. A thin film can be applied on the disk, which allows very high-shear-rate measurements at low sliding speeds with negligible viscous heating. Both disk and slider have been made of optically transparent material to allow optical measurements simultaneously with the rheological measurements. In the present mode, the apparatus is set up for simultaneous rheometery and birefringence measurements on a thin film of polymer lubricant. Rheology and birefringence measurements were made on a perfluoropolyether lubricant over a range of strain rate from 10(3) s(-1) to greater than 10(6) s(-1) with 800 nm, 400 nm, and 200 nm film thicknesses. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Condensed Matter Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. RP Cochran, HD (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM hdc@ornl.gov NR 16 TC 18 Z9 18 U1 2 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD JUN PY 2004 VL 75 IS 6 BP 2171 EP 2176 DI 10.1063/1.1711145 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA 825YC UT WOS:000221793800039 ER PT J AU Clarke, JH MacDonell, MM Smith, ED Dunn, RJ Waugh, WJ AF Clarke, JH MacDonell, MM Smith, ED Dunn, RJ Waugh, WJ TI Engineered containment and control systems: Nurturing nature SO RISK ANALYSIS LA English DT Article DE environmental stewardship; waste management; engineered systems; containment and control; natural processes AB The development of engineered containment and control systems for contaminated sites must consider the environmental setting of each site. The behaviors of both contaminated materials and engineered systems are affected by environmental conditions that will continue to evolve over time as a result of such natural processes as climate change, ecological succession, pedogenesis, and landform changes. Understanding these processes is crucial to designing, implementing, and maintaining effective systems for sustained health and environmental protection. Traditional engineered systems such as landfill liners and caps are designed to resist natural processes rather than working with them. These systems cannot be expected to provide long-term isolation without continued maintenance. In some cases, full-scale replacement and remediation may be required within 50 years, at an effort and cost much higher than for the original cleanup. Approaches are being developed to define smarter containment and control systems for stewardship sites, considering lessons learned from implementing prescriptive waste disposal regulations enacted since the 1970s. These approaches more effectively involve integrating natural and engineered systems; enhancing sensors and predictive tools for evaluating performance; and incorporating information on failure events, including precursors and consequences, into system design and maintenance. An important feature is using natural analogs to predict environmental conditions and system responses over the long term, to accommodate environmental change in the design process, and, as possible, to engineer containment systems that mimic favorable natural systems. The key emphasis is harmony with the environment, so systems will work with and rely on natural processes rather than resisting them. Implementing these new integrated systems will reduce current requirements for active management, which are resource-intensive and expensive. C1 Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Kleinfelder Inc, Pleasanton, CA USA. US DOE, Grand Junction Off, Environm Sci Lab, Grand Junction, CO USA. RP Clarke, JH (reprint author), Vanderbilt Univ, Dept Civil & Environm Engn, Nashville, TN 37235 USA. EM james.h.clarke@vanderbilt.edu RI Smith, Ellen/B-9432-2012 NR 21 TC 4 Z9 4 U1 0 U2 3 PU BLACKWELL PUBLISHERS PI MALDEN PA 350 MAIN STREET, STE 6, MALDEN, MA 02148 USA SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD JUN PY 2004 VL 24 IS 3 BP 771 EP 779 DI 10.1111/j.0272-4332.2004.00474.x PG 9 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA 834UL UT WOS:000222436300020 PM 15209944 ER PT J AU Daugherty, WL Cannell, GR AF Daugherty, WL Cannell, GR TI Weld porosity in containers for storage of plutonium containing materials SO SCIENCE AND TECHNOLOGY OF WELDING AND JOINING LA English DT Article DE gas tungsten arc weld; porosity; type 316L stainless steel; joint geometry AB An autogenous gas tungsten arc closure weld was developed for the US Department of Energy's primary container Jar the storage of plutonium bearing materials. The occurrence of porosity at the tie-in point of the closure weld was investigated. The primary cause of the porosity was linked to the geometry at the root of the closure weld joint. The present paper describes the mechanistic model that was developed to describe and predict the porosity. C1 Westinghouse Savannah River Co, Savannah River Technol Ctr, Aiken, SC 29808 USA. RP Daugherty, WL (reprint author), Westinghouse Savannah River Co, Savannah River Technol Ctr, Aiken, SC 29808 USA. EM william.daugherty@srs.gov NR 3 TC 0 Z9 0 U1 1 U2 1 PU MANEY PUBLISHING PI LEEDS PA HUDSON RD, LEEDS LS9 7DL, ENGLAND SN 1362-1718 J9 SCI TECHNOL WELD JOI JI Sci. Technol. Weld. Join. PD JUN PY 2004 VL 9 IS 3 BP 267 EP 271 DI 10.1179/136217104225012247 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 846MC UT WOS:000223318700010 ER PT J AU Somekawa, H Nieh, TG Higashi, K AF Somekawa, H Nieh, TG Higashi, K TI Instrumented indentation properties of electrodeposited Ni-W alloys with different microstructures SO SCRIPTA MATERIALIA LA English DT Article DE Ni-W alloy; electrodeposition; strain rate sensitivity; amorphous structure; nanocrystals ID BULK METALLIC-GLASS; NANOCRYSTALLINE NICKEL; MECHANICAL-PROPERTIES; SERRATED FLOW; DEFORMATION; CREEP; BEHAVIOR; NANOINDENTATION; SIMULATIONS; DEPENDENCE AB The microstructures and mechanical properties electrodeposited Ni-W alloys synthesized Lit two plating bath temperatures of 353 and 348 K were investigated. Whereas the 353 K sample is amorphous, the 348 K sample has a mixed amorphous-nanocrystalline structure. As a result, the strength of the 348 K sample exhibits strong strain rate dependence during nanoindentation. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Osaka Prefecture Univ, Dept Met & Mat Sci, Sakai, Osaka 5998531, Japan. Lawrence Livermore Natl Lab, Div Mat Sci & Technol, Livermore, CA 94550 USA. RP Somekawa, H (reprint author), Osaka Prefecture Univ, Dept Met & Mat Sci, 1-1 Gakuen Cho, Sakai, Osaka 5998531, Japan. EM cz203@mtl.osakafu-u.ac.jp RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 29 TC 26 Z9 26 U1 0 U2 15 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD JUN PY 2004 VL 50 IS 11 BP 1361 EP 1365 DI 10.1016/j.scriptamat.2004.02.042 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 810CY UT WOS:000220683600001 ER PT J AU De, AK Murdock, DC Mataya, MC Speer, JG Matlock, DK AF De, AK Murdock, DC Mataya, MC Speer, JG Matlock, DK TI Quantitative measurement of deformation-induced martensite in 304 stainless steel by X-ray diffraction SO SCRIPTA MATERIALIA LA English DT Article DE X-ray diffraction; stainless steel; martensitic phase transformation; shear bands; stacking faults ID 304 STAINLESS STEEL; NUCLEATION AB A single X-ray diffraction scan is effectively used for identifying and evaluating deformation-induced transformation in 304 austenitic stainless steel. Variations in grain size influence surface constraint and hence the through-thickness transformation response. The initial stage of transformation in this steel is most likely dominated by epsilon-martensite formation. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA. Micro Mot Inc, Emerson Proc Management, Boulder, CO 80301 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Matlock, DK (reprint author), Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, 1500 Illinois St, Golden, CO 80401 USA. EM dmatlock@mines.edu NR 17 TC 158 Z9 166 U1 10 U2 48 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD JUN PY 2004 VL 50 IS 12 BP 1445 EP 1449 DI 10.1016/j.scriptamat.2004.03.011 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 814YH UT WOS:000221009500006 ER PT J AU Holian, BL AF Holian, BL TI Molecular dynamics comes of age for shockwave research SO SHOCK WAVES LA English DT Article DE molecular; dynamics; shock waves; condensed matter ID ORIENTATION DEPENDENCE; SIMULATIONS; WAVES C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Holian, BL (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM blh@lanl.gov NR 17 TC 29 Z9 31 U1 2 U2 15 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0938-1287 J9 SHOCK WAVES JI Shock Waves PD JUN PY 2004 VL 13 IS 6 BP 489 EP 495 DI 10.1007/s00193-004-0226-5 PG 7 WC Mechanics SC Mechanics GA 832AK UT WOS:000222239100007 ER PT J AU Ding, CHQ Zha, HY He, XF Husbands, P Simon, HD AF Ding, CHQ Zha, HY He, XF Husbands, P Simon, HD TI Link analysis: Hubs and authorities on the World Wide Web SO SIAM REVIEW LA English DT Article DE webpage ranking; random graph; co-citation; co-reference; HITS; PageRank AB Ranking the tens of thousands of retrieved webpages for a user query on a Web search engine such that the most informative webpages are on the top is a key information retrieval technology. A popular ranking algorithm is the HITS algorithm of Kleinberg. It explores the reinforcing interplay between authority and hub webpages on a particular topic by taking into account the structure of the Web graphs formed by the hyperlinks between the webpages. In this paper, we give a detailed analysis of the HITS algorithm through a unique combination of probabilistic analysis and matrix algebra. In particular, we show that to first-order approximation, the ranking given by the HITS algorithm is the same as the ranking by counting inbound and outbound hyperlinks. Using Web graphs of different sizes, we also provide experimental results to illustrate the analysis. C1 Univ Calif Berkeley, NERSC Div, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Penn State Univ, Dept Comp Sci & Engn, University Pk, PA 16802 USA. RP Ding, CHQ (reprint author), Univ Calif Berkeley, NERSC Div, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM chqding@lbl.gov; zha@cse.psu.edu; xhe@lbl.gov; pjrhusbands@lbl.gov; hdsimon@lbl.gov NR 26 TC 15 Z9 15 U1 1 U2 7 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA SN 0036-1445 J9 SIAM REV JI SIAM Rev. PD JUN PY 2004 VL 46 IS 2 BP 256 EP 268 DI 10.1137/S0036144501389218 PG 13 WC Mathematics, Applied SC Mathematics GA 823UV UT WOS:000221639800004 ER PT J AU Jagadish, HV Olken, F AF Jagadish, HV Olken, F TI Database management for life sciences research SO SIGMOD RECORD LA English DT Article AB The life sciences provide a rich application domain for data management research, with a broad diversity of problems that can make a significant difference to progress in life sciences research. This article is an extract from the Report of the NSF Workshop on Data Management for Molecular and Cell Biology, edited by H. V. Jagadish and Frank Olken. The workshop was held at the National Library of Medicine, Bethesda, MD, Feb. 2-3, 2003. C1 Univ Michigan, Ann Arbor, MI 48109 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Jagadish, HV (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA. EM jag@umich.edu; olken@lbl.gov NR 1 TC 13 Z9 13 U1 0 U2 1 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 1515 BROADWAY, NEW YORK, NY 10036 USA SN 0163-5808 J9 SIGMOD RECORD JI Sigmod Rec. PD JUN PY 2004 VL 33 IS 2 BP 15 EP 20 PG 6 WC Computer Science, Information Systems; Computer Science, Software Engineering SC Computer Science GA 852DD UT WOS:000223734500002 ER PT J AU Tonn, BE Hemrick, A AF Tonn, BE Hemrick, A TI Impacts of the use of e-mail and the Internet on personal trip-making behavior SO SOCIAL SCIENCE COMPUTER REVIEW LA English DT Article DE e-mail; Internet; travel; education; income AB This article presents the results of a web survey of 118 residents in the Knoxville, Tennessee, metropolitan region to explore the impacts of the use of e-mail and the Internet on personal trip-making behavior. Respondents were required to be active drivers and users of e-mail and/or the Internet. Approximately 40% reported that their use of these information technologies has led to less driving overall, and 18% reported less rush hour driving. Although use of the Internet has led to both trip reduction and new trip generation, overall, weekly trips appear to be reduced by 8% from the national average of almost 28 person trips per week in 2001. The number of places respondents have access to e-mail and the Internet is highly related to trip reduction and new trip generation. Education and income were positively related to new trip generation. C1 Univ Tennessee, Dept Urban & Reg Planning, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN USA. RP Tonn, BE (reprint author), Univ Tennessee, Dept Urban & Reg Planning, Knoxville, TN 37996 USA. EM btonn@utk.edu; ahemrick@utk.edu NR 25 TC 11 Z9 11 U1 0 U2 0 PU SAGE PUBLICATIONS INC PI THOUSAND OAKS PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA SN 0894-4393 J9 SOC SCI COMPUT REV JI Soc. Sci. Comput. Rev. PD SUM PY 2004 VL 22 IS 2 BP 270 EP 280 DI 10.1177/0894439303262581 PG 11 WC Computer Science, Interdisciplinary Applications; Information Science & Library Science; Social Sciences, Interdisciplinary SC Computer Science; Information Science & Library Science; Social Sciences - Other Topics GA 811VI UT WOS:000220799000012 ER PT J AU Tan, ZX Lal, R Izaurralde, RC Post, WM AF Tan, ZX Lal, R Izaurralde, RC Post, WM TI Biochemically protected soil organic carbon at the north appalachian experimental watershed SO SOIL SCIENCE LA English DT Article DE soil organic matter; nonhydrolyzable fraction; soil aggregate; Alfisols; no-till; conventional tillage ID NATIVE GRASSLAND SOILS; CULTIVATED SOILS; MATTER; DYNAMICS; AGGREGATE; STABILIZATION; MANAGEMENT; AGROECOSYSTEMS; NITROGEN; ROOT AB Land use and soil management affect the balance between labile and stable organic matter fractions in surface soils. This study was conducted to quantify the contribution of nonhydrolyzable carbon (NHC) to total soil organic carbon (SOC) and to identify the role of biochemical protection mechanisms in SOC sequestration by comparing the NHC fraction associated with aggregates from 0 to 5-, 5 to 10-, and 10 to 20 cm depths under forest, meadow, no-till (NT) and conventional tillage (CT) treatments. The NHC contribution to SOC declined from 53% under forest to 37% under CT and 39% under NT, implying that the conversion from forest to cultivation led mainly to a reduction in the NHC. Aggregate-associated NHC concentration increased with aggregate size (except for CT treatment). Conversion from CT to NT enriched NHC in all aggregate fractions, but even more so in the >250-Rm fraction, underscoring the importance of macroaggregate fractions in encapsulating and thus protecting SOC from microbial processes. The formation of macroaggregates is coupled with the depletion of microaggregates, which can be quantitatively described by functions (for each aggregate class) expressed in terms of the aggregate mass and the proportion NHC/SOC. Both the NHC fraction and the nonhydrolyzable C:N ratio increased with the increase in SOC concentration in soils under Meadow and forest, suggesting a large potential for SOC sequestration through biochemical protection mechanisms. C1 Ohio State Univ, Carbon Management & Sequestrat Ctr, Columbus, OH 43210 USA. Joint Global Change Res Inst, College Pk, MD USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Tan, ZX (reprint author), 210 Kottman Hall,2021 Coffey Rd, Columbus, OH 43210 USA. EM tan.129@osu.edu RI Post, Wilfred/B-8959-2012; Izaurralde, Roberto/E-5826-2012; Lal, Rattan/D-2505-2013 NR 45 TC 24 Z9 28 U1 2 U2 9 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0038-075X J9 SOIL SCI JI Soil Sci. PD JUN PY 2004 VL 169 IS 6 BP 423 EP 433 DI 10.1097/01.ss.000031227.51226.68 PG 11 WC Soil Science SC Agriculture GA 829BW UT WOS:000222019100003 ER PT J AU Bals, S Kabius, B Haider, M Radmilovic, V Kisielowski, C AF Bals, S Kabius, B Haider, M Radmilovic, V Kisielowski, C TI Annular dark field imaging in a TEM SO SOLID STATE COMMUNICATIONS LA English DT Article DE dark field TEM; Z-contrast ID CONTRAST AB Annular objective apertures are fabricated for a CM300 transmission electron microscope using a focused ion beam system. A central beam stop in the back focal plane of the objective lens of the microscope blocks all electrons scattered up to a semi-angle of approximately 20 mrad. In this manner, contributions to the image from Bragg scattering are largely reduced and the image contrast is sensitive to the atomic number Z. Experimentally, we find that single atom scattering cross sections measured with this technique are close to Rutherford scattering values. A comparison between this new method and STEM-HAADF shows that both techniques result in qualitatively similar images although the resolution of ADF-TEM is limited by contrast delocalization caused by the spherical aberration of the objective lens. This problem can be overcome by using an aberration corrected microscope. Published by Elsevier Ltd. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. CEOS GmbH, D-69126 Heidelberg, Germany. RP Bals, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM sbals@lbl.gov; cfkisielowski@lbl.gov RI Bals, Sara/F-6963-2016 NR 15 TC 28 Z9 29 U1 4 U2 33 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD JUN PY 2004 VL 130 IS 10 BP 675 EP 680 DI 10.1016/j.ssc.2004.03.035 PG 6 WC Physics, Condensed Matter SC Physics GA 821UU UT WOS:000221489300007 ER PT J AU Schwank, JR Ferlet-Cavrois, V Dodd, PE Shaneyfelt, MR Vizkelethy, G Paillet, P Flament, O AF Schwank, JR Ferlet-Cavrois, V Dodd, PE Shaneyfelt, MR Vizkelethy, G Paillet, P Flament, O TI Analysis of heavy-ion induced charge collection mechanisms in SOI circuits SO SOLID-STATE ELECTRONICS LA English DT Article ID BEAM-INDUCED CHARGE; MULTIPLE-BIT UPSET; BIPOLAR AMPLIFICATION; DOSE-RATE; RADIATION; TECHNOLOGIES; TRANSISTORS; DEVICES; IRRADIATION; CAPACITORS AB Focused ion microbeam and broadbeam heavy-ion experiments on capacitors and SRAMs are used to investigate charge collection in Sol devices. Charge collection in capacitors and ICs can be induced by displacement currents caused by the release of charge in the substrate. The magnitude of charge collection depends on the geometry, gate surface area and oxide thickness of the device. It is mainly induced by the diffusion of carriers generated in the silicon bulk, which induces a voltage drop under the oxide surface. Carrier diffusion in low-doped silicon creates coupling effects between MOS elements separated by up to hundreds of microns. However, because of charge sharing effects, charge collection by displacement currents (by itself) does not appear to significantly affect SEU sensitivity in Sol devices. p-n junctions are far less sensitive to charge sharing effects than neighboring MOS structures. A mechanism that can significantly increase the SEU saturation cross section in SOI devices is charge release in non-ideally doped drain regions (not heavily doped throughout the silicon film). Carriers released in drain regions can drift or diffuse into the body region and be amplified by parasitic bipolar effects. By heavily doping drain junctions throughout the silicon film, drain strike sensitivity can be significantly reduced. For this case, SEU sensitivity can be limited to gate (body) strikes and by reducing parasitic bipolar effects using body ties, Sol circuits can be fabricated that are very hard to single event effects. These results have important implications on the soft-error reliability of SOI and other oxide-isolated structures, e.g., DRAMs. For Sol SRAMs, it is possible that the additive effects of charge collection by displacement currents and charge released in drain regions may lead to SEU. For trench DRAMs, the retention capacitors are particularly sensitive to charge released in the substrate. Charge collection in retention capacitors by displacement currents can lead to multiple bit upsets (MBUs) in DRAMs, thus significantly degrading the soft-error reliability of DRAMs. (C) 2004 Elsevier Ltd. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. CEA, DIF, F-91680 Bruyeres Le Chatel, France. RP Schwank, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM schwanjr@sandia.gov; ferlet@bruyeres.cea.fr NR 35 TC 5 Z9 5 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1101 J9 SOLID STATE ELECTRON JI Solid-State Electron. PD JUN PY 2004 VL 48 IS 6 BP 1027 EP 1044 DI 10.1016/j.sse.2003.12.038 PG 18 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA 806FK UT WOS:000220419600019 ER PT J AU Pruess, K AF Pruess, K TI Numerical simulation of CO2 leakage from a geologic disposal reservoir, including transitions from super- to subcritical conditions, and boiling of liquid CO2 SO SPE JOURNAL LA English DT Article ID CARBON-DIOXIDE; ORIGIN; GAS AB The critical point of CO2 is at temperature and pressure conditions of T-crit = 31.04degreesC, P-crit = 73.82 bar. At lower (subcritical) temperatures and/or pressures, CO2 can exist in two different phase states, a liquid and a gaseous state, as well as in two-phase mixtures of these states. Disposal Of CO2 into brine formations would be made at supercritical pressures. However, CO2 escaping from the storage reservoir may migrate upward toward regions with lower temperatures and pressures, where CO2 would be in subcritical conditions. An assessment of the fate of leaking CO2 requires a capability to model not only supercritical but also subcritical CO2, as well as phase changes between liquid and gaseous CO2 in subcritical conditions. We have developed a methodology for numerically simulating the behavior of water/CO2 mixtures in permeable media under conditions that may include liquid, gaseous, and supercritical CO2. This has been applied to simulations of leakage from a deep storage reservoir in which a rising CO2 plume undergoes transitions from supercritical to subcritical conditions. We find strong cooling effects when liquid CO2 rises to elevations where it begins to boil and evolve a gaseous CO2 phase. A three-phase zone forms (aqueous/liquid/gas), which over time becomes several hundred meters thick as decreasing temperatures permit liquid CO2 to advance to shallower elevations. Fluid mobilities are reduced in the three-phase region from phase interference effects. This impedes CO2 upflow, causes the plume to spread out laterally, and gives rise to dispersed CO2 discharge at the land surface. Our simulation suggests that temperatures along a CO2 leakage path may decline to levels low enough that solid water ice and CO2 hydrate phases may be formed. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Pruess, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM K_Pruess@lbl.gov NR 31 TC 40 Z9 40 U1 1 U2 15 PU SOC PETROLEUM ENG PI RICHARDSON PA 222 PALISADES CREEK DR,, RICHARDSON, TX 75080 USA SN 1086-055X J9 SPE J JI SPE J. PD JUN PY 2004 VL 9 IS 2 BP 237 EP 248 DI 10.2118/86098-PA PG 12 WC Engineering, Petroleum SC Engineering GA 832FC UT WOS:000222251600012 ER PT J AU Moridis, GJ AF Moridis, GJ TI Numerical studies of gas production from Class 2 and Class 3 hydrate accumulations at the Mallik site, Mackenzie Delta, Canada SO SPE RESERVOIR EVALUATION & ENGINEERING LA English DT Article; Proceedings Paper CT 2002 SPE Asia Pacific Oil and Gas Conference and Exhibition CY OCT 08-10, 2002 CL MELBOURNE, AUSTRALIA SP Soc Petr Engineers AB The Mallik site represents an onshore permafrost-associated methane hydrate accumulation in the Mackenzie Delta, Northwest Territories, Canada. This study focuses on gas production at the Mallik site from hydrate deposits that are underlain by either a free-water zone (Class 2) or an impermeable boundary (Class 3). The production analysis was conducted with a numerical simulator that can model the nonisothermal CH4 release, phase behavior, and flow under conditions typical of CH4-hydrate deposits by solving the coupled equations of mass and heat balance. Accumulations with a CH4-hydrate saturation of at least 50% were studied. Dissociation was induced mainly by a combination of thermal stimulation and depressurization as hot fluids circulated between injection and production wells. The effects of salinity and of pressure changes at the wells were also accounted for. The production strategy resulted in a zero net water production. The simulation results indicated that the amount of CH4 released from the dissociating hydrate deposits is sensitive to the hydrate saturation, the initial temperature, the specific enthalpy, and the flow rate of the circulating fluids. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Hydrol & Reservoir Dynam Dept, Berkeley, CA 94720 USA. RP Moridis, GJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Hydrol & Reservoir Dynam Dept, Berkeley, CA 94720 USA. NR 10 TC 27 Z9 30 U1 2 U2 10 PU SOC PETROLEUM ENG PI RICHARDSON PA 222 PALISADES CREEK DR,, RICHARDSON, TX 75080 USA SN 1094-6470 J9 SPE RESERV EVAL ENG JI SPE Reserv. Eval. Eng. PD JUN PY 2004 VL 7 IS 3 BP 175 EP 183 PG 9 WC Energy & Fuels; Engineering, Petroleum; Geosciences, Multidisciplinary SC Energy & Fuels; Engineering; Geology GA 834TN UT WOS:000222433900002 ER PT J AU Sahni, A Gadelle, F Kumar, M Tomutsa, L Kovscek, AR AF Sahni, A Gadelle, F Kumar, M Tomutsa, L Kovscek, AR TI Experiments and analysis of heavy-oil solution-gas drive SO SPE RESERVOIR EVALUATION & ENGINEERING LA English DT Article; Proceedings Paper CT 2001 SPE Annual Technical Conference and Exhibition CY SEP 30-OCT 03, 2001 CL NEW ORLEANS, LA SP Soc Petr Engineers ID FLOW; RESERVOIRS AB We provide a general framework for interpreting heavy-oil solution-gas-drive experiments. Evolution of the gas phase below the thermodynamic bubblepoint is investigated with dimensionless scaling groups, mechanistic modeling, and experiments. Carefully planned and monitored depletion experiments are conducted to evaluate pre- and post-critical gas-saturation behavior. In-situ phase saturations are measured with X-ray computerized tomography (CT) scanning. These data are used in conjunction with differential-pressure measurements along the core to obtain phase mobilities. It is demonstrated that most laboratory heavy-oil-depletion experiments show nonequilibrium effects that depend on the oil-phase viscosity and depletion rate. Factors leading to the coalescence of gas-bubble clusters and development of bulk gas flow are illustrated with examples, along with an empirical correlation for critical gas saturation (S-gc). Examination of field-pressure gradients and flow rates suggests that dispersed gas flow may occur close to the wellbore or near wormholes, if present. C1 ChevronTexaco Energy Technol Co, Houston, TX USA. Lawrence Berkeley Lab, Berkeley, CA USA. Stanford Univ, Stanford, CA 94305 USA. RP Sahni, A (reprint author), ChevronTexaco Energy Technol Co, Houston, TX USA. NR 15 TC 6 Z9 6 U1 0 U2 1 PU SOC PETROLEUM ENG PI RICHARDSON PA 222 PALISADES CREEK DR,, RICHARDSON, TX 75080 USA SN 1094-6470 J9 SPE RESERV EVAL ENG JI SPE Reserv. Eval. Eng. PD JUN PY 2004 VL 7 IS 3 BP 217 EP 229 PG 13 WC Energy & Fuels; Engineering, Petroleum; Geosciences, Multidisciplinary SC Energy & Fuels; Engineering; Geology GA 834TN UT WOS:000222433900006 ER PT J AU Daujotyte, D Serva, S Vilkaitis, G Merkiene, E Venclovas, C Klimasauskas, S AF Daujotyte, D Serva, S Vilkaitis, G Merkiene, E Venclovas, C Klimasauskas, S TI Hhal DNA methyltransferase uses the protruding Gln237 for active flipping of its target cytosine SO STRUCTURE LA English DT Article ID CRYSTAL-STRUCTURE; BASE-PAIRS; METHYLATION; 2-AMINOPURINE; RECOGNITION; MISMATCHES; MECHANISM; BINDING; REPAIR; CONFORMATION AB Access to a nucleoticle by its rotation out of the DNA helix (base flipping) is used by numerous DNA modification and repair enzymes. Despite extensive studies of the paradigm Hha1 methyltransferase, initial events leading to base flipping remained elusive. Here we demonstrate that the replacement of the target C:G pair with the 2-aminopurine:T pair in the DNA or shortening of the side chain of Gln237 in the protein severely perturb base flipping, but retain specific DNA binding. Kinetic analyses and molecular modeling suggest that a steric interaction between the protruding side chain of Gln237 and the target cytosine in B-DNA reduces the energy barrier for flipping by 3 kcal/mol. Subsequent stabilization of an open state by further 4 kcal/mol is achieved through specific hydrogen bonding of the side chain to the orphan guanine. Gln237 thus plays a key role in actively opening the target C:G pair by a "push-and-bind" mechanism. C1 Inst Biotechnol, Lab Biol DNA Modificat, LT-02241 Vilnius, Lithuania. Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. RP Klimasauskas, S (reprint author), Inst Biotechnol, Lab Biol DNA Modificat, LT-02241 Vilnius, Lithuania. EM klimasau@ibt.lt RI Klimasauskas, Saulius/M-3053-2016 OI Klimasauskas, Saulius/0000-0002-1395-2030 NR 35 TC 30 Z9 31 U1 0 U2 5 PU CELL PRESS PI CAMBRIDGE PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA SN 0969-2126 J9 STRUCTURE JI Structure PD JUN PY 2004 VL 12 IS 6 BP 1047 EP 1055 DI 10.1016/j.str.2004.04.007 PG 9 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA 830WO UT WOS:000222155100016 PM 15274924 ER PT J AU Venkataraman, K Lee, DF Leonard, K Heatherly, L Cook, S Paranthaman, M Mika, M Maroni, VA AF Venkataraman, K Lee, DF Leonard, K Heatherly, L Cook, S Paranthaman, M Mika, M Maroni, VA TI Reel-to-reel x-ray diffraction and Raman microscopy analysis of differentially heat-treated Y-BaF2-Cu precursor films on metre-length RABiTS SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article ID LATTICE VIBRATION-SPECTRA; YBCO-COATED CONDUCTORS; THIN-FILMS; POWDER DIFFRACTION; LOCAL-STRUCTURE; BUFFER LAYERS; SPECTROSCOPY; GROWTH; TAPES; SCATTERING AB Reel-to-reel x-ray diffraction (XRD) and Raman micro-spectroscopy are being evaluated as potential diagnostic tools for on-line feedback in the manufacturing of long-length coated conductors. To facilitate this evaluation, a procedure based on differentially heat-treated Y-BaF2-CU precursors exposed to time-synchronized phase composition gradients has been developed. Two time-gradient-processed YBa2Cu3O7-x (YBCO) tapes of different thicknesses were fabricated using this procedure. The two techniques (used in combination) provided detailed phase and microstructure information as a function of temperature and heat treatment time and identified the same optimum processing time domain windows. More importantly, these deduced optimum times were found to be in close agreement with transport J(c), measurements on replicate tapes. In addition, Raman data provided unambiguous identification of key intermediate phases such as BaF2, CuO, Y2Cu2O5, and barium cuprates. Using these results, a hypothetical Y-BaF2-CU to YBCO reaction mechanism is proposed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Venkataraman, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 40 TC 18 Z9 19 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD JUN PY 2004 VL 17 IS 6 BP 739 EP 749 AR PII S0953-2048(04)73722-7 DI 10.1088/0953-2048/17/6/002 PG 11 WC Physics, Applied; Physics, Condensed Matter SC Physics GA 831MM UT WOS:000222198500003 ER PT J AU Rivard, JDK Blue, CA Ott, RD Sabau, A Santella, M Pan, TY Joaquin, A AF Rivard, JDK Blue, CA Ott, RD Sabau, A Santella, M Pan, TY Joaquin, A TI Advanced manufacturing technologies utilising high density infrared radiant heating SO SURFACE ENGINEERING LA English DT Article DE high density infrared processing; plasma arc lamp heating; preferential heat treating; aluminium alloys; radiant heat transfer modelling; effective processing time; thermophysical properties AB Oak Ridge National Laboratory has developed a unique rapid heating capability utilising a high density infrared (HDI) radiant plasma arc lamp. Power densities less than or equal to3.5 W cm(-2) are achievable over an area 35 x 3.175 cm. The power output of the lamp is continuously variable over a range from 1.5% to 100% of available power, and power changes can occur in <20 ms. Processing temperatures 3000degreesC can be obtained in a wide variety of processing environments, making HDI a flexible processing tool. Recently, this newly developed heating method was used to investigate selective softening, i.e. hardness reduction of 6063-T6 aluminium alloy. By changing the incident power and exposure tune, the percentage reduction in hardness and softened zone size can be varied. It is shown that computer modelling can be used to predict the thermal history and the resulting heat affected zone during HDI processing. In the present work, a 50% reduction in hardness was achieved and confirmed by mechanical testing and microstructural investigation. Micrographs of softened aluminium show that Mg2Si precipitates had dissolved back into solution. This new approach allows materials to be engineered for a predetermined response to dynamic loading or other environmental situations. (C) 2004 IoM Communications Ltd. Published by Maney for the Institute of Materials, Minerals and Mining. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Ford Res Lab, Mfg Syst Dept, Dearborn, MI 48124 USA. RP Rivard, JDK (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. EM rivardjd@ornl.gov RI Sabau, Adrian/B-9571-2008 OI Sabau, Adrian/0000-0003-3088-6474 NR 7 TC 8 Z9 9 U1 0 U2 0 PU MANEY PUBLISHING PI LEEDS PA HUDSON RD, LEEDS LS9 7DL, ENGLAND SN 0267-0844 J9 SURF ENG JI Surf. Eng. PD JUN PY 2004 VL 20 IS 3 BP 220 EP 228 DI 10.1179/026708404225015022 PG 9 WC Materials Science, Coatings & Films SC Materials Science GA 840NV UT WOS:000222866700014 ER PT J AU Kendelewicz, T Doyle, CS Bostick, BC Brown, GE AF Kendelewicz, T Doyle, CS Bostick, BC Brown, GE TI Initial oxidation of fractured surfaces of FeS2(100) by molecular oxygen, water vapor, and air SO SURFACE SCIENCE LA English DT Article DE sulphides; oxidation; X-ray photoelectron spectroscopy ID ACID-MINE DRAINAGE; PYRITE OXIDATION; IRON; STATES; PASSIVATION; MECHANISMS; XPS AB Synchrotron-based Fe 2p, S 2p, and O 1s photoemission spectroscopy was used to study the initial stages of oxidation of UHV-fractured (1 0 0) surfaces of pyrite by molecular oxygen, water vapor, and ambient air. Molecular oxygen alone reacts measurably with pyrite surface to yield new oxidized species only for high doses of similar to10(7) L, while reaction with water vapor does not take place even at doses as high as 10(10) L. In both cases, however, monosulfide defects on fractured pyrite surfaces are eradicated by the dosing with O-2 and H2O. For high O-2 partial pressures, the extent of reaction with oxygen is comparable to that produced by equivalent air exposures, indicating that the presence of water is not strictly necessary for initial oxidation of pyrite(1 0 0) to occur in our experiments. The formation of several intermediate oxidation products, including sulfur oxoanions and zero-valent sulfur, are quantified by spectral decomposition as a function of dose, and the mode of their formation is discussed. (C) 2004 Elsevier B.V. All rights reserved. C1 Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Kendelewicz, T (reprint author), Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Green Bldg r303, Stanford, CA 94305 USA. EM kendelewicz@ssrl.slac.stanford.edu NR 22 TC 40 Z9 41 U1 5 U2 23 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JUN 1 PY 2004 VL 558 IS 1-3 BP 80 EP 88 DI 10.1016/j.susc.2004.03.045 PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 825AI UT WOS:000221728000009 ER PT J AU Sun, YW Lu, XJ Petersen, JN Buscheck, TA AF Sun, YW Lu, XJ Petersen, JN Buscheck, TA TI An analytical solution of tetrachloroethylene transport and biodegradation SO TRANSPORT IN POROUS MEDIA LA English DT Article DE solution; convergent reaction; tetrachloroethylene; transport; first-order decay ID MULTISPECIES TRANSPORT AB In this manuscript, we consider a transport system with a dechlorination reaction network, in which tetrachloroethylene (PCE) reacts to produce trichloroethylene (TCE), TCE reacts to form three daughter products, cis-1,2-dichloroethylene (cis-1,2-DCE), trans-1,2-dichloroethylene ( trans1,2-DCE), and 1,1-dichloroethylene (1,1-DCE), three DCEs further react to produce vinyl chloride ( VC), finally VC reacts to produce ethylene (ETH). Because the partial differential equation describing the reactive transport of VC, is coupled by three reactant concentrations, currently the problem must be solved numerically. Following Lu et al. ( 2003), we extend the analytical solution from five species to the entire PCE reaction network. Using the singular value decomposition (SVD) the system of transport equations with convergent reactions is decoupled into seven orthogonal subsystems. Previously published analytical solutions of single species transport become the basic solutions in the transformed domain for each independent subsystem. The solutions in real concentration domain are obtained using the inverse transform. The solution derived in this study can then be used instead of Sun et al. ( 1999) in BIOCHLOR for simulating more realistic systems of biodegradation and reactive transport. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Calif State Univ Hayward, Hayward, CA 94542 USA. Washington State Univ, Pullman, WA 99164 USA. RP Sun, YW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Petersen, James/B-8924-2008; Sun, Yunwei/C-9751-2010 NR 10 TC 17 Z9 18 U1 0 U2 4 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0169-3913 J9 TRANSPORT POROUS MED JI Transp. Porous Media PD JUN PY 2004 VL 55 IS 3 BP 301 EP 308 DI 10.1023/B:TIPM.0000013327.32136.52 PG 8 WC Engineering, Chemical SC Engineering GA 767DH UT WOS:000188424600004 ER PT J AU Spellman, PT Sherlock, G AF Spellman, PT Sherlock, G TI Reply: whole-culture synchronization effective tools for cell cycle studies SO TRENDS IN BIOTECHNOLOGY LA English DT Editorial Material ID SACCHAROMYCES-CEREVISIAE; MESSENGER-RNA; REGULATED GENES; YEAST; EXPRESSION; PROTEIN; IDENTIFICATION; DIVISION; SPINDLES; MEIOSIS AB Studies of gene expression during the eukaryotic cell cycle in whole-culture synchronized cultures have been published using many methodologies. These procedures alter the state of the cell cycle for a population of cells, rather than purifying a population of cells that are in the same state. Criticism of these methods (e.g. see Cooper, this issue, pp. 266-269, DOI:10.1016/i.tibtech.2004.04.009) suggests that these studies are flawed, and posits that such methodologies cannot be used to study the cell cycle because they alter the size and age distributions of the cultures. We believe that whole-culture cell cycle studies work even though they alter the size and age distributions: these cells still progress through the cell cycle and although we do not suggest that the methods are perfect, we will explain how these microarray studies have successfully identified cell cycle regulated genes and why these results are biologically meaningful. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Stanford Univ, Sch Med, Dept Genet, Stanford, CA 94305 USA. RP Spellman, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,Bldg 84,Room 336, Berkeley, CA 94720 USA. EM PTSpellman@lbl.gov RI Sherlock, Gavin/B-1831-2009; Sherlock, Gavin/E-9110-2012 NR 20 TC 17 Z9 17 U1 0 U2 3 PU ELSEVIER SCIENCE LONDON PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0167-7799 J9 TRENDS BIOTECHNOL JI Trends Biotechnol. PD JUN PY 2004 VL 22 IS 6 BP 270 EP 273 DI 10.1016/S0167-7799(04)00115-5 PG 4 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 832XM UT WOS:000222301000004 PM 15158053 ER PT J AU Spellman, PT Sherlock, G AF Spellman, PT Sherlock, G TI Final words: cell age and cell cycle are. unlinked SO TRENDS IN BIOTECHNOLOGY LA English DT Editorial Material ID IDENTIFICATION; GENES AB Cooper has a simple belief: that the cell cycle is connected to age and size. Furthermore, as a result of this connection in his mind he believes that there are no possible manipulations that can operate on a batch culture to synchronize cells within the cell cycle, such that those cells can undergo a semblance of a normal cell cycle. His formulation of this argument is as a 'fundamental law', the law of conservation of cell-age order (LCCAO). The first part of this law - 'there is no batch treatment of the culture that can lead to an alteration of the cell-age order' - can probably be proved true, in the mathematical sense, and certainly makes intuitive sense. Unfortunately the corollaries of this law are rather suspect, drawing inferences from cell age to cell size to the cell cycle. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Stanford Univ, Sch Med, Dept Genet, Stanford, CA 94305 USA. RP Spellman, PT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,Bldg 84,Room 336, Berkeley, CA 94720 USA. EM PTSpellman@lbl.gov RI Sherlock, Gavin/B-1831-2009; Sherlock, Gavin/E-9110-2012 NR 5 TC 9 Z9 9 U1 0 U2 1 PU ELSEVIER SCIENCE LONDON PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0167-7799 J9 TRENDS BIOTECHNOL JI Trends Biotechnol. PD JUN PY 2004 VL 22 IS 6 BP 277 EP 278 DI 10.1016/S0167-7799(04)00117-9 PG 2 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 832XM UT WOS:000222301000006 PM 15158055 ER PT J AU Kaplan, DI Gilmore, TJ AF Kaplan, DI Gilmore, TJ TI Zero-valent iron removal rates of aqueous Cr(VI) measured under flow conditions SO WATER AIR AND SOIL POLLUTION LA English DT Article DE chromium; groundwater remediation; kinetics; metallic iron; reactive well technology; recirculating well ID IN-SITU REMEDIATION; SUBSURFACE REMEDIATION; CHROMATE REDUCTION; GROUNDWATER; KINETICS AB The rates of Cr(VI) removal from the aqueous phase by zero-valent iron, Fe( 0), was measured under flow conditions. The intent of this work was to generate removal rate coefficients that would be applicable to the Reactive Well Technology, a groundwater remediation technology that replaces the sand in a filter pack of a conventional well with a reactive material, such as Fe( 0). Dissolved Cr(VI) concentration, dissolved O-2 concentration, and Eh data indicated that Cr(VI) removal from the aqueous phase was mass-transfer limited. All pseudo-first-order regression fits to the data were significant (P less than or equal to 0.05), however, they did not capture many of the salient aspects of the data, including that the removal rate often decreased as contact time increased. As such, application of these rate coefficients to predict long-term Cr( VI) removal were compromised. The rate coefficients measured under flow conditions were comparable to those measured previously under batch conditions with significantly greater solution: solid ratios. Between the range of 20 and 100 wt-% Fe(0) in the column, there was little measurable change in the reaction kinetics. Thus, it may be possible to include sand into the reactive filter packs in the event it is necessary to increase filter pack porosity or to decrease the accumulation of secondary reaction products that may lead to filter pack plugging. Background water chemistry (0.2 M NaHCO3, distilled water, and a carbonate-dominated groundwater) had only marginal, if any, effects on reaction rate coefficients. The reaction rates measured in this study indicated that an Fe(0) filter pack could be used to lower Cr( VI) concentrations by several orders of magnitude in a once-through mode of operation of the Reactive Well Technology. C1 Westinghouse Savannah River Co, Aiken, SC 29808 USA. Pacific NW Natl Lab, Richland, WA USA. RP Kaplan, DI (reprint author), Westinghouse Savannah River Co, Aiken, SC 29808 USA. EM daniel.kaplan@srs.gov NR 25 TC 28 Z9 29 U1 2 U2 7 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0049-6979 J9 WATER AIR SOIL POLL JI Water Air Soil Pollut. PD JUN PY 2004 VL 155 IS 1-4 BP 21 EP 33 DI 10.1023/B:WATE.0000026518.23591.ac PG 13 WC Environmental Sciences; Meteorology & Atmospheric Sciences; Water Resources SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences; Water Resources GA 817XB UT WOS:000221209100003 ER PT J AU Mosleh, M Blau, PJ Dumitrescu, D AF Mosleh, M Blau, PJ Dumitrescu, D TI Characteristics and morphology of wear particles from laboratory testing of disk brake materials SO WEAR LA English DT Article DE wear particles; disk brake materials; debris size distribution; wear particle morphology; brake dust ID FRICTION MATERIALS; PADS AB The geometrical characteristics and morphology of wear particles generated from brake materials are important for environmental and tribological reasons. Low- and high-speed, pin-on-disk friction and wear testing of a commercial truck brake pad material against cast iron was conducted in which wear debris was collected. The sliding speed was held constant either at 0.275 or at 5 m/s, and the nominal contact pressure was varied between 0.125 and 1.25 MPa in room temperature air. In low-speed experiments, some tests were conducted with the pin in continuous sliding contact and others in which the pin specimen was raised and lowered periodically. Laser scattering examination of wear debris revealed two distinct peaks in the plot of frequency versus the mean particle size. The first peak occurs around 350 nm and does not vary with respect to the pressure and the sliding speed. The location of the second peak varies between 2 and 15 mum, depending on the pressure and the sliding speed. Energy dispersive X-ray (EDX) analysis of wear particles revealed particles having a high concentration of carbon, silicon, aluminum, iron, oxygen, molybdenum, and sulfur. It was also found that the continuity or discontinuity of sliding contact affects the size distribution of wear particles. In general, when the motion was discontinuous, as is the case in a repeated braking action, smaller wear particles are generated. (C) 2003 Elsevier B.V. All rights reserved. C1 Howard Univ, Coll Engn, Dept Mech Engn Architecture & Computer Sci, Washington, DC 20059 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Michigan, Dept Engn Mech, Ann Arbor, MI 48109 USA. RP Mosleh, M (reprint author), Howard Univ, Coll Engn, Dept Mech Engn Architecture & Computer Sci, Rm 2036-C,2300 6th St NW, Washington, DC 20059 USA. EM mmosleh@fac.howard.edu NR 10 TC 50 Z9 50 U1 0 U2 5 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD JUN PY 2004 VL 256 IS 11-12 BP 1128 EP 1134 DI 10.1016/j.wear.2003.07.007 PG 7 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA 824MD UT WOS:000221689800013 ER PT J AU Sun, X Stephens, EV Khaleel, MA Shao, H Kimchi, M AF Sun, X Stephens, EV Khaleel, MA Shao, H Kimchi, M TI Resistance spot welding of aluminum alloy to steel with transition material - From process to performance - Part 1: Experimental study - Weld strength, failure mode, and fatigue life were compared with self-piercing rivets of the same dissimilar metals combination SO WELDING JOURNAL LA English DT Article DE spot welding; dissimilar metals joining; aluminum alloy; transition material; aluminum-clad steel; nugget growth; weld strength; weld dynamic strength; weld fatigue strength ID FINITE-ELEMENT AB This paper summarizes our work to date on resistance spot welding of aluminum alloy to steel, from process development to performance evaluation. Since aluminum alloys and steel cannot be readily fusion welded together due to their drastically different thermal physical properties, a cold-rolled clad material was introduced as a transition to aid the resistance welding process. The optimal welding parameters and electrode selections were established using experimental approaches. The welded samples' mechanical behaviors were then evaluated using static and dynamic weld strength tests as well as cyclic fatigue tests. The weld strength, failure mode, and fatigue life were then compared with self-piercing rivets of the same dissimilar metals combination. Statistical analyses were also performed to analyze the effects of different failure modes on samples' peak strength and energy absorption. C1 Battelle Mem Inst, Columbus, OH 43201 USA. Pacific NW Natl Lab, Richland, WA USA. Edison Welding Inst, Columbus, OH 43212 USA. RP Sun, X (reprint author), Battelle Mem Inst, Columbus, OH 43201 USA. NR 16 TC 36 Z9 39 U1 1 U2 14 PU AMER WELDING SOC PI MIAMI PA 550 N W LEJEUNE RD, MIAMI, FL 33126 USA SN 0043-2296 J9 WELD J JI Weld. J. PD JUN PY 2004 VL 83 IS 6 BP 188S EP 195S PG 8 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 826BD UT WOS:000221803000009 ER PT J AU Mook, WM Jungk, JM Cordill, MJ Moody, NR Sun, YG Xia, YN Gerberich, WW AF Mook, WM Jungk, JM Cordill, MJ Moody, NR Sun, YG Xia, YN Gerberich, WW TI Geometry and surface state effects on the mechanical response of Au nanostructures SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article DE nanostructure; hardness; dislocation; length scale ID DISCRETE DISLOCATION PLASTICITY; THIN-FILMS; LENGTH-SCALE; NANOINDENTATION; DEFORMATION; SIMULATION; CHEMISTRY; FRACTURE; MODULUS; GROWTH AB A study of ultra-thin gold films and thin-walled nanoboxes has confirmed that length scales in terms of dislocation spacing can predict flow stress. Initial stages of deformation conform to linear hardening with average dislocation spacing controlled by the number of geometrically necessary dislocations in a pile-up. Later stages of deformation exhibit parabolic behavior with Taylor hardening interpreted in terms of a dislocation density described by the total line length of prismatic loops per unit volume. Comparisons of 20 and 40 nm thick planar films could be made to 205 nm high hollow gold nanoboxes with a wall thickness of 24 nm. These highly constrained, ultra-thin planar films demonstrated increased hardness from about 2 to 10 GPa with strains of 20 percent while less constrained nanoboxes increased from 0.8 to 4 GPa for the same strain magnitude. C1 Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA. Sandia Natl Labs, Livermore, CA USA. Univ Washington, Dept Chem, Seattle, WA 98195 USA. RP Gerberich, WW (reprint author), Univ Minnesota, Dept Chem Engn & Mat Sci, 421 Washington Ave SE,151 Amundson Hall, Minneapolis, MN 55455 USA. EM wgerb@umn.edu RI Sun, Yugang /A-3683-2010; Xia, Younan/E-8499-2011; OI Sun, Yugang /0000-0001-6351-6977; Cordill, Megan/0000-0003-1142-8312 NR 28 TC 15 Z9 15 U1 1 U2 8 PU CARL HANSER VERLAG PI MUNICH PA KOLBERGERSTRASSE 22, POSTFACH 86 04 20, D-81679 MUNICH, GERMANY SN 0044-3093 J9 Z METALLKD JI Z. Metallk. PD JUN PY 2004 VL 95 IS 6 BP 416 EP 424 PG 9 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 834AL UT WOS:000222383700004 ER PT J AU Bei, H George, EP Kenik, EA Pharr, GM AF Bei, H George, EP Kenik, EA Pharr, GM TI Microstructures and mechanical properties of V-V3Si eutectic composites SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article DE transition metal silicide; directional solidification; eutectics; composites; vanadium alloys; intermetallics ID DIRECTIONAL SOLIDIFICATION; CR-CR3SI ALLOYS; LAMELLAR; TRANSITION; SILICIDES AB V-V3Si eutectic alloys were directionally solidified in a high temperature optical floating zone furnace. Depending on the solidification conditions, several microstructures were observed, such as well-aligned broken lamellar, fibrous, or cellular microstructures. The interphase spacings increased with decreasing solidification rates in agreement with the Jackson-Hunt theory. The mechanical properties of the individual phases were investigated by nanoindentation. It was found that the modulus and nanoindentation hardness Of V3Si are 214 and 13.8 GPa, respectively, and those of the V solid-solution are 165 and 3.4 GPa, respectively. The high-temperature strength was examined by tensile testing at elevated temperatures. Preliminary results show that the ductile-to-brittle transition temperature is about 800 degreesC for this composite, and its strength is significantly higher than conventional V solid-solution alloys. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. RP George, EP (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA. EM georgeep@ornl.gov RI George, Easo/L-5434-2014; OI Bei, Hongbin/0000-0003-0283-7990 NR 21 TC 12 Z9 12 U1 0 U2 4 PU CARL HANSER VERLAG PI MUNICH PA KOLBERGERSTRASSE 22, POSTFACH 86 04 20, D-81679 MUNICH, GERMANY SN 0044-3093 J9 Z METALLKD JI Z. Metallk. PD JUN PY 2004 VL 95 IS 6 BP 505 EP 512 PG 8 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA 834AL UT WOS:000222383700016 ER PT J AU Zhou, XJ Tsetseris, L Rashkeev, SN Fleetwood, DM Schrimpf, RD Pantelides, ST Felix, JA Gusev, EP D'Emic, C AF Zhou, XJ Tsetseris, L Rashkeev, SN Fleetwood, DM Schrimpf, RD Pantelides, ST Felix, JA Gusev, EP D'Emic, C TI Negative bias-temperature instabilities in metal-oxide-silicon devices with SiO2 and SiOxNy/HfO2 gate dielectrics SO APPLIED PHYSICS LETTERS LA English DT Article ID RADIATION RESPONSE; SI-SIO2 INTERFACES; MOS CAPACITORS; P-TYPE; HYDROGEN; GENERATION; DIFFUSION; TRANSISTORS; TRANSPORT; MECHANISM AB Negative bias-temperature instability (NBTI) in metal-oxide-semiconductor capacitors with SiOxNy/HfO2 gate dielectrics is compared to those with thermal SiO2 oxides. Activation energies for interface and oxide-trap charge densities for each device type, estimated from capacitance-voltage measurements versus temperature and electric field, lie in the range 0.2-0.4 eV. This suggests that the release of hydrogen from, e.g., oxide protrusions in Si, followed by the lateral motion of protons along the interface (activation energy similar to0.3 eV), may play a key role in NBTI. Passivation reactions between protons and Si-H can create interface traps, and proton capture by sub-oxide bonds (O vacancies) can lead to positive trapped-oxide charge. (C) 2004 American Institute of Physics. C1 Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. IBM Corp, Thomas J Watson Res Ctr, IBM Semicond Res & Dev Ctr, Yorktown Hts, NY 10598 USA. RP Zhou, XJ (reprint author), Vanderbilt Univ, Dept Elect Engn & Comp Sci, Stn B 351825, Nashville, TN 37235 USA. EM xing.zhou@vanderbilt.edu RI Schrimpf, Ronald/L-5549-2013 OI Schrimpf, Ronald/0000-0001-7419-2701 NR 21 TC 39 Z9 39 U1 1 U2 55 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 31 PY 2004 VL 84 IS 22 BP 4394 EP 4396 DI 10.1063/1.1757636 PG 3 WC Physics, Applied SC Physics GA 822KF UT WOS:000221537500012 ER PT J AU Shutthanandan, V Thevuthasan, S Heald, SM Droubay, T Engelhard, MH Kaspar, TC McCready, DE Saraf, L Chambers, SA Mun, BS Hamdan, N Nachimuthu, P Taylor, B Sears, RP Sinkovic, B AF Shutthanandan, V Thevuthasan, S Heald, SM Droubay, T Engelhard, MH Kaspar, TC McCready, DE Saraf, L Chambers, SA Mun, BS Hamdan, N Nachimuthu, P Taylor, B Sears, RP Sinkovic, B TI Room-temperature ferromagnetism in ion-implanted Co-doped TiO2(110) rutile SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; SEMICONDUCTORS; SPINTRONICS; ZNO AB Ferromagnetic Co-doped rutile TiO2 single crystals were synthesized by high-temperature ion implantation and characterized by a variety of techniques. Co is uniformly distributed to a depth of similar to300 nm with an average concentration of similar to2 at. %, except in the near-surface region, where the concentration is similar to3 at. %. Ferromagnetic behavior is exhibited at room temperature with an effective saturation magnetization of similar to0.6 mu(B)/Co atom. The Co is in a formal oxidation state of +2 throughout the implanted region, and no Co(O) is detected. (C) 2004 American Institute of Physics. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. RP Shutthanandan, V (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM shuttha@pnl.gov RI Engelhard, Mark/F-1317-2010; Mun, Bongjin /G-1701-2013; Droubay, Tim/D-5395-2016; OI Droubay, Tim/0000-0002-8821-0322; Engelhard, Mark/0000-0002-5543-0812 NR 15 TC 44 Z9 47 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 31 PY 2004 VL 84 IS 22 BP 4466 EP 4468 DI 10.1063/1.1753652 PG 3 WC Physics, Applied SC Physics GA 822KF UT WOS:000221537500036 ER PT J AU Gagliardi, MS Ren, Y Mitchell, JF Beno, MA AF Gagliardi, MS Ren, Y Mitchell, JF Beno, MA TI Magnetic-field-induced structural homogeneity of a phase-separated manganite SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSITION; CHARGE; STATE AB Magnetic field (MF) dependence of the phase separation (PS) in the manganite Pr-0.65(Ca0.7Sr0.3)(0.35)MnO3 was studied using high-energy x-ray powder diffraction. The compound shows intrinsic inhomogeneities in the form of coexisting competing phases below a temperature T-c. Application of MFs not only eliminates the multiple phases below T-c but also significantly affects the structure above T-c. The MF-induced structural phase transition occurs abruptly at 2 K but is smooth at higher temperatures. Moreover, the MF dependence of some reflection intensities clearly indicates a complicated PS. This MF-induced homogeneity should play a key role in the colossal magnetoresistance effect. (C) 2004 American Institute of Physics. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Gagliardi, MS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM yren@anl.gov NR 18 TC 4 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 31 PY 2004 VL 84 IS 22 BP 4538 EP 4540 DI 10.1063/1.1758777 PG 3 WC Physics, Applied SC Physics GA 822KF UT WOS:000221537500060 ER PT J AU Doyle, CS Kendelewicz, T Brown, GE AF Doyle, CS Kendelewicz, T Brown, GE TI Inhibition of the reduction of Cr(VI) at the magnetite-water interface by calcium carbonate coatings SO APPLIED SURFACE SCIENCE LA English DT Article DE chromate reduction; surface passivation; vadose zone; carbonate; magnetite ID IRON CORROSION PRODUCTS; CRYSTAL-GROWTH; AQUEOUS CR(VI); NUCLEAR-WASTE; SURFACES; CHROMIUM; VATERITE; ARAGONITE; SPECTROSCOPY; DISSOLUTION AB The effect of calcium carbonate coatings on the reduction of aqueous chromate on the magnetite(111) surface has been investigated using a combination of synchrotron based X-ray photoemission spectroscopy (PES) and X-ray absorption near edge structure (XANES) spectroscopy, along with laboratory-based powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). CaCO3 coatings (dominantly calcite with minor quantities of aragonite and vaterite) of thicknesses ranging from 10 Angstrom to similar to20 m were grown on magnetite(111) surfaces by exposure to supersaturated aqueous solutions followed by evaporation of the solution-a process that mimics pore-water evaporation in vadose zones leading to the formation of caliche and calcium carbonate coatings on mineral grains. Coating thicknesses were determined from attenuation of the Fe 2p photoemission signal by the carbonate coating. For coatings less than 15 Angstrom thick, Cr 2p photoemission and Cr L-II, L-III-edge XANES spectra show that chromate is reduced by the underlying magnetite surface; however, as the minimum coating thickness increases beyond 15 Angstrom, the magnetite surface becomes passivated and further chromate reduction ceases. Our findings suggest that carbonate coatings on natural magnetite grains can significantly reduce or eliminate their ability to reduce Cr(VI), which is a toxic and highly mobile environmental contaminant. (C) 2004 Elsevier B.V. All rights reserved. C1 Stanford Univ, Surface & Aqueous Geochem Grp, Dept Geol & Environm Sci, Stanford, CA 94305 USA. SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Doyle, CS (reprint author), Stanford Univ, Surface & Aqueous Geochem Grp, Dept Geol & Environm Sci, Stanford, CA 94305 USA. EM cdoyle@pangea.stanford.edu NR 56 TC 11 Z9 11 U1 0 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAY 31 PY 2004 VL 230 IS 1-4 BP 260 EP 271 DI 10.1016/j.apsusc.2004.02.035 PG 12 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 828IX UT WOS:000221968100033 ER PT J AU Zhang, ZC Jin, JJ Bautista, F Lyons, LJ Shariatzadeh, N Sherlock, D Amine, K West, R AF Zhang, ZC Jin, JJ Bautista, F Lyons, LJ Shariatzadeh, N Sherlock, D Amine, K West, R TI Ion conductive characteristics of cross-linked network polysiloxane-based solid polymer electrolytes SO SOLID STATE IONICS LA English DT Article DE polysiloxane; cross-linked network; solid polymer electrolytes; ionic conductivity ID OLIGO(OXYETHYLENE) SIDE-CHAINS; COMB POLYMERS; SILOXANE; COMPLEXES; POLYPHOSPHAZENES; SOLVENTS; OXIDE) AB A series of cross-linked network polysiloxanes containing oligoethylene oxide units, (OCH2CH2)(n), as internal free chains have been synthesized by performing hydrosilylation of partially PEO-substituted polysiloxane precursor with alpha, omega-diallyl terminated poly(ethylene glycol). The polymer electrolytes were formed by complexing with LiN(CF3SO2)(2) electrolyte salt and exhibited superior conductive property. The sigma(RT) of the network polymer electrolytes is in the range of 2.50 x 10(-5) to 1.62 x 10(-4) S/cm and depends on the cross-linking density (in terms of Si-H amount of the siloxane precursor), repeating unit number of internal oligoethylene oxide and chain length of the cross-linker. The significant enhancement of the conductivity was observed when low molecular weight dimethyl poly(ethylene glycol) was added as plasticizer. The temperature dependence of the ionic conductivity was also studied, following the Vogel - Tamman - Fulcher (VTF) equation. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Wisconsin, Dept Chem, Organosilicon Res Ctr, Madison, WI 53706 USA. Grinnell Coll, Dept Chem, Grinnell, IA 50112 USA. Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA. RP Zhang, ZC (reprint author), Univ Wisconsin, Dept Chem, Organosilicon Res Ctr, 1101 Univ Ave, Madison, WI 53706 USA. EM zczhang@chem.wisc.edu RI Amine, Khalil/K-9344-2013 NR 34 TC 32 Z9 37 U1 3 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD MAY 31 PY 2004 VL 170 IS 3-4 BP 233 EP 238 DI 10.1016/j.ssi.2004.04.007 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 837IN UT WOS:000222622500011 ER PT J AU Carter, KM George, JS Rector, DM AF Carter, KM George, JS Rector, DM TI Simultaneous birefringence and scattered light measurements reveal anatomical features in isolated crustacean nerve SO JOURNAL OF NEUROSCIENCE METHODS LA English DT Article DE lobster; optical; swelling; polarized; neuron; axon; propagation velocity ID OPTICAL COHERENCE TOMOGRAPHY; NONINVASIVE DETECTION; NEURAL ACTIVITY; ORGANIZATION; STIMULATION; EXCITATION; SIGNALS; NEURONS; CORTEX AB Simultaneous fast birefringence and scattered light changes associated with crustacean nerve activation have different time Courses and are produced by separate biophysical mechanisms. Technological advances in illumination, photodiodes and amplification Circuitry achieved better signal-to-noise than earlier studies revealing optical signals in axonal nerve bundles as small as crayfish ventral cord and claw. The birefringence measurements yielded signals that could be observed in single trials, with temporally separated peaks associated with axonal populations of different diameters. A slit aperture placed perpendicular to the nerve reduced the spatial-temporal integration and enhanced the temporal structure of the separate peaks in the birefringence signal. Moving the slit aperture farther front the stimulation point delayed the signal in time. and also enhanced the separation between peaks. Different propagation velocities of the separate peaks provided evidence for at least three neuronal Populations in the bundle. These studies underscore the advantages of birefringence over scattering measurements. Application of birefringence methods can optimize non-invasive imaging techniques being developed to detect fast optical responses associated with electrical neural activity in humans. (C) 2003 Elsevier B.V. All rights reserved. C1 Washington State Univ, VCAPP Dept, Pullman, WA 99164 USA. Los Alamos Natl Lab, Biophys Grp P21, Los Alamos, NM 87545 USA. RP Rector, DM (reprint author), Washington State Univ, VCAPP Dept, POB 646520, Pullman, WA 99164 USA. EM kcarter@vetmed.wsu.edu; jsg@lanl.gov; drector@vetmed.wsu.edu FU NIMH NIH HHS [MH 60263, MH 60993] NR 28 TC 29 Z9 29 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-0270 J9 J NEUROSCI METH JI J. Neurosci. Methods PD MAY 30 PY 2004 VL 135 IS 1-2 BP 9 EP 16 DI 10.1016/j.jneumeth.2003.11.010 PG 8 WC Biochemical Research Methods; Neurosciences SC Biochemistry & Molecular Biology; Neurosciences & Neurology GA 813DG UT WOS:000220887200002 PM 15020084 ER PT J AU Chen, PS AF Chen, PS TI Planck-size black hole remnants as dark matter SO MODERN PHYSICS LETTERS A LA English DT Article; Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics ( CosPA 2003) CY NOV 13-15, 2003 CL Taipei, TAIWAN SP Inst Astron & Astrophys, Acad Sinica, Asia Pacific Ctr Theoret Phys, Nat Ctr Theoret Sci, Tokyo Univ, Res Ctr Early Universe, Stanford Univ, Stanford Linear Accelerator Ctr, Assoc Asia Pacific Phys Soc, Minist Educ, Natl Sci Council ID GENERALIZED UNCERTAINTY PRINCIPLE; INFLATIONARY COSMOLOGY; GRAVITY; RELICS; MASS; PERTURBATION; UNIVERSE AB While there exist various candidates, the nature of dark matter remains unresolved. Recently it was argued that the generalized uncertainty principle (GUP) may prevent a black hole from evaporating completely, and as a result there should exist a Planck-size black hole remnant (BHR) at the end of its evaporation. If a sufficient amount of small black holes can be produced in the early universe, then the resultant BHRs can be an interesting candidate for DM. We demonstrate that this is indeed the case for the hybrid inflation model. By assuming BHR as DM, our notion imposes a constraint on the hybrid inflation potential. We show that such a constraint is not so fine-tuned. Possible observational signatures are briefly discussed. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Chen, PS (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM chen@slac.stanford.edu NR 31 TC 2 Z9 2 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAY 30 PY 2004 VL 19 IS 13-16 SI SI BP 1047 EP 1054 DI 10.1142/S0217732304014355 PG 8 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA 827QF UT WOS:000221914800016 ER PT J AU Meneghetti, M Dolag, K Tormen, G Bartelmann, M Moscardini, L Perrotta, F Baccigalupi, C AF Meneghetti, M Dolag, K Tormen, G Bartelmann, M Moscardini, L Perrotta, F Baccigalupi, C TI Arc statistics with numerical cluster models in of dark energy cosmologies SO MODERN PHYSICS LETTERS A LA English DT Article; Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics ( CosPA 2003) CY NOV 13-15, 2003 CL Taipei, TAIWAN SP Inst Astron & Astrophys, Acad Sinica, Asia Pacific Ctr Theoret Phys, Nat Ctr Theoret Sci, Tokyo Univ, Res Ctr Early Universe, Stanford Univ, Stanford Linear Accelerator Ctr, Assoc Asia Pacific Phys Soc, Minist Educ, Natl Sci Council DE cosmology; galaxy clusters; gravitational lensing AB We perform a set of ray-tracing simulations, using numerical cluster models, aiming at evaluating how the galaxy cluster efficiency for producing strong lensing events changes in different cosmological models with dark energy. The sample of investigated clusters for which we present our results here is composed by 7 dark matter halos. Each of them was simulated in 8 different cosmological models with constant and time-variable equation of state of dark energy. For all the clusters in the sample, we have measured the lensing cross sections for producing giant arcs, i.e. arcs having a minimum length-to-width ratio. We find that the lensing cross section for giant arcs is sensitive to the equation of state of quintessence. Indeed, the optical depth, which can be translated into a number of arcs by multiplying by the correct density of source galaxy on the sky, spans more than one order of magnitude among different cosmological models. C1 Univ Padua, Dipartimento Astron, I-35122 Padua, Italy. Univ Padua, Dipartimento Astron, I-35100 Padua, Italy. Univ Heidelberg, D-6900 Heidelberg, Germany. Univ Bologna, Dipartimento Astron, I-40126 Bologna, Italy. SISSA, Trieste, Italy. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Meneghetti, M (reprint author), Univ Padua, Dipartimento Astron, Vicolo Osservatorio 2, I-35122 Padua, Italy. EM meneghetti@pd.astro.it RI Bartelmann, Matthias/A-5336-2014; OI Meneghetti, Massimo/0000-0003-1225-7084 NR 8 TC 3 Z9 3 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAY 30 PY 2004 VL 19 IS 13-16 SI SI BP 1083 EP 1087 DI 10.1142/S0217732304014409 PG 5 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA 827QF UT WOS:000221914800021 ER PT J AU McKellar, BHJ AF McKellar, BHJ TI Terrestrial, astrophysical and cosmological implications of a background neutrino density SO MODERN PHYSICS LETTERS A LA English DT Article; Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics ( CosPA 2003) CY NOV 13-15, 2003 CL Taipei, TAIWAN SP Inst Astron & Astrophys, Acad Sinica, Asia Pacific Ctr Theoret Phys, Nat Ctr Theoret Sci, Tokyo Univ, Res Ctr Early Universe, Stanford Univ, Stanford Linear Accelerator Ctr, Assoc Asia Pacific Phys Soc, Minist Educ, Natl Sci Council DE neutrino mass; dark energy; ultra high energy cosmic rays AB We discuss the implications of a new scalar field coupled to neutrinos. C1 Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. RP McKellar, BHJ (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. EM mckellar@physics.unimelb.edu.au NR 10 TC 5 Z9 5 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAY 30 PY 2004 VL 19 IS 13-16 SI SI BP 1155 EP 1162 DI 10.1142/S0217732304014501 PG 8 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA 827QF UT WOS:000221914800031 ER PT J AU Johnson, MB AF Johnson, MB TI Non-abelian dynamics in first-order cosmological phase transitions SO MODERN PHYSICS LETTERS A LA English DT Article; Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics ( CosPA 2003) CY NOV 13-15, 2003 CL Taipei, TAIWAN SP Inst Astron & Astrophys, Acad Sinica, Asia Pacific Ctr Theoret Phys, Nat Ctr Theoret Sci, Tokyo Univ, Res Ctr Early Universe, Stanford Univ, Stanford Linear Accelerator Ctr, Assoc Asia Pacific Phys Soc, Minist Educ, Natl Sci Council DE cosmological phase transitions; bubble collisions; non-abelian fields ID BUBBLE COLLISIONS AB Bubble collisions in cosmological phase transitions are explored, taking the non-abelian character of the gauge fields into account. Both the QCD and electroweak phase transitions are considered. Numerical solutions of the field, equations in several limits are presented. C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. RP Johnson, MB (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. EM mbjohnson@lanl.gov NR 7 TC 3 Z9 3 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAY 30 PY 2004 VL 19 IS 13-16 SI SI BP 1187 EP 1194 DI 10.1142/S0217732304014549 PG 8 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA 827QF UT WOS:000221914800035 ER PT J AU Liu, CY Lamoreaux, SK AF Liu, CY Lamoreaux, SK TI A new search for a permanent dipole moment of the electron in a solid state system SO MODERN PHYSICS LETTERS A LA English DT Article; Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics ( CosPA 2003) CY NOV 13-15, 2003 CL Taipei, TAIWAN SP Inst Astron & Astrophys, Acad Sinica, Asia Pacific Ctr Theoret Phys, Nat Ctr Theoret Sci, Tokyo Univ, Res Ctr Early Universe, Stanford Univ, Stanford Linear Accelerator Ctr, Assoc Asia Pacific Phys Soc, Minist Educ, Natl Sci Council DE electric dipole moment; CP violation; solid state system AB Measurements of the electric dipole moment (EDM) of the neutron and the electron put the most stringent constraints on new sources of CP violation. CP violation is essential for generating the observed baryon asymmetry of the universe (BAU). Many models which propose large CP-odd mechanisms for BAU predict EDMs that exceed the limits of the most sensitive measurements. We are conducting a high sensitivity search for the electron EDM using a solid state system. It promises orders of magnitude improvement over atomic beam experiments solely from the available electron density. We present the experimental design and report on the current status. C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. RP Liu, CY (reprint author), Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. EM cyliu@lanl.gov NR 5 TC 22 Z9 22 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 912805, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAY 30 PY 2004 VL 19 IS 13-16 SI SI BP 1235 EP 1238 DI 10.1142/S0217732304014628 PG 4 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA 827QF UT WOS:000221914800043 ER PT J AU Doskey, PV Kotamarthi, VR Fukui, Y Cook, DR Breitbeil, FW Wesely, ML AF Doskey, PV Kotamarthi, VR Fukui, Y Cook, DR Breitbeil, FW Wesely, ML TI Air-surface exchange of peroxyacetyl nitrate at a grassland site SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article DE PAN; air-surface exchange; dry deposition ID PARTITION-COEFFICIENTS; ORGANIC-CHEMICALS; POLYCHLORINATED-BIPHENYLS; LIPOPHILIC CHEMICALS; DRY DEPOSITION; PLANT CUTICLES; FOLIAGE; ACCUMULATION; ATMOSPHERE; VEGETATION AB Direct measurements of the dry deposition velocity of peroxyacetyl nitrate (PAN) were made during the daytime between the months of July and October above a grassland surface in northern Illinois by a modified Bowen ratio technique. Differences in the air temperature, water vapor content, and PAN concentration were measured between the heights of 3.0 m and 0.92 m. Although the measurement uncertainties were large, the cumulative data indicate a slight downward flux of PAN, with an average and standard error of 0.13 +/- 0.13 cm s(-1) for the dry deposition velocity. Theoretical calculations showed that thermochemical decomposition of PAN on leaf and soil surfaces heated to temperatures above the ambient air levels would contribute less than 15% of the total PAN flux at the elevations of the PAN measurements. A theoretical evaluation of the transfer of PAN through leaf stomata and the plant cuticular membrane indicated that uptake of PAN by vegetation during the daytime is controlled by transfer through the leaf stomata rather than the cuticular membrane. The stomatal resistance for PAN is greater by a factor of 1.6 than the value for O-3. The mesophyll resistance for O-3 is also expected to be less than the value for PAN, because O-3 has more reaction sites within plant cells and reacts faster than PAN with protein thiols of the cell membranes. Measurements from other studies indicate that the dry deposition velocity for PAN above a vegetated surface during the daytime is lower by a factor of 0.5-0.3 than for O-3. Our measurements of the PAN deposition velocity agree with the results of previous studies and with theoretical calculations based on the physicochemical properties of PAN and the grassland surface. These measurements imply that removal of PAN from the daytime atmospheric boundary layer by thermochemical decomposition is more rapid than dry deposition to a grassland surface. C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. MDL Informat Syst Inc, San Leandro, CA 94577 USA. Depaul Univ, Dept Chem, Chicago, IL 60604 USA. RP Doskey, PV (reprint author), Argonne Natl Lab, Div Environm Res, 9700 S Cass Ave, Argonne, IL 60439 USA. EM pvdoskey@anl.gov NR 50 TC 22 Z9 22 U1 2 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD MAY 29 PY 2004 VL 109 IS D10 AR D10310 DI 10.1029/2004JD004533 PG 9 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 827OT UT WOS:000221910900002 ER PT J AU Hopkins, WA Staub, BP Snodgrass, JW Taylor, BE DeBiase, AE Roe, JH Jackson, BP Congdon, JD AF Hopkins, WA Staub, BP Snodgrass, JW Taylor, BE DeBiase, AE Roe, JH Jackson, BP Congdon, JD TI Responses of benthic fish exposed to contaminants in outdoor microcosms - examining the ecological relevance of previous laboratory toxicity tests SO AQUATIC TOXICOLOGY LA English DT Article DE coal combustion wastes; microcosms; mesocosms; selenium; cadmium; trophic transfer ID COAL ASH; BIOACCUMULATION; COMMUNITIES; INSECTICIDE; SEDIMENTS; DISPOSAL; SURVIVAL; FOOD AB Previous laboratory studies indicate that coal combustion wastes (a mixture composed of fly ash and other lower volume wastes such as bottom ash; hereafter collectively referred to as ash) adversely affect the health of benthic fish (Erimyzon sucetta; lake chubsucker), but fish in these studies were provided with ample uncontaminated food resources. Because aquatic disposal of ash can also adversely affect food resources for benthic fish, we hypothesized that changes in resources might exacerbate the effects of ash on fish observed in laboratory studies. We exposed juvenile E. sucetta in outdoor microcosms to water, sediment, and benthic resources from an ash-contaminated site or a reference site for 45 days and compared our findings to previous laboratory studies. Benthic invertebrate biomass was nearly three times greater in controls compared to ash microcosms. Total organic content of control sediment (41%) was also greater than in ash sediments (17%), suggesting that additional benthic resources may have also been limited in ash microcosms. Benthic invertebrates isolated from the ash microcosms had trace element concentrations (As, Cd, Co, Cr, Cs, Se, Sr, and V) up to 18 times higher than in weathered ash used in laboratory studies. The concentrations of trace elements accumulated by fish reflected the high dietary concentrations encountered in the ash microcosms and were associated with reduced growth (final mass = 0.07 g) and survival (25%) compared to controls (0.37 g and 67%, respectively). Accumulation of trace elements, as well as reductions in growth and, survival, were more pronounced than in previous laboratory studies, suggesting that resource conditions may be important in mediating ash toxicity. Taken together, our studies suggest that ash discharge into aquatic systems is a more serious threat to the health of benthic fish than previously predicted based upon laboratory toxicity tests. Published by Elsevier B.V. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ S Carolina, Dept Biol Sci, Columbia, SC 29208 USA. Towson Univ, Dept Biol, Towson, MD USA. RP Hopkins, WA (reprint author), Univ Georgia, Savannah River Ecol Lab, Drawer E, Aiken, SC 29802 USA. EM hopkins@srel.edu RI Snodgrass, Joel/C-5288-2016 NR 30 TC 21 Z9 21 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-445X J9 AQUAT TOXICOL JI Aquat. Toxicol. PD MAY 28 PY 2004 VL 68 IS 1 BP 1 EP 12 DI 10.1016/j.aquatox.2004.01.021 PG 12 WC Marine & Freshwater Biology; Toxicology SC Marine & Freshwater Biology; Toxicology GA 822OM UT WOS:000221549500001 PM 15110465 ER PT J AU Teske, CA Blanch, HW Prausnitz, JM AF Teske, CA Blanch, HW Prausnitz, JM TI Chromatographic measurement of interactions between unlike proteins SO FLUID PHASE EQUILIBRIA LA English DT Article DE precipitation; crystallization; purification; statistical mechanics; mixture ID SELF-INTERACTION CHROMATOGRAPHY; 2ND VIRIAL-COEFFICIENTS; BOVINE SERUM-ALBUMIN; MOLECULAR THERMODYNAMICS; ELECTROLYTE-SOLUTIONS; GLOBULAR-PROTEINS; PHASE-DIAGRAM; CRYSTALLIZATION; LYSOZYME; SALT AB A chromatographic method is used to measure ovalbumin-lysozyme and BSA-lysozyme interactions in aqueous salt solutions as a function of solution conditions (pH, ionic strength, salt type). In this method, one protein is immobilized on the support surface, and the other, dissolved in a buffer/electrolyte solution, flows over that surface. The retention time provides a measure of immobile/mobile protein-protein interactions. Trends in ovalbumin-lysozyme interactions suggest that they are primarily electrostatic. The identity of the electrolyte has a strong influence on the magnitude of the interaction. Assuming a potential of mean force that contains a hard sphere, electrostatic, and square-well potential, experimental results are used to fit the square-well depth. For BSA-lysozyme interactions, the square-well depth depends on which protein is immobilized on the solid phase. (C) 2004 Published by Elsevier B.V. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Prausnitz, JM (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EM prausnit@cchem.berkeley.edu RI Teske, Christopher/B-5974-2008 NR 35 TC 15 Z9 16 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAY 28 PY 2004 VL 219 IS 2 BP 139 EP 148 DI 10.1016/j.fluid.2004.01.025 PG 10 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA 822DR UT WOS:000221516300005 ER PT J AU Cai, J Prausnitz, JM AF Cai, J Prausnitz, JM TI Thermodynamics for fluid mixtures near to and far from the vapor-liquid critical point SO FLUID PHASE EQUILIBRIA LA English DT Article DE renormalization group theory; continuous thermodynamics; critical state; equation-of-state; polydisperse mixture ID EQUATION-OF-STATE; RENORMALIZATION-GROUP THEORY; LENNARD-JONES FLUID; CRITICAL REGION; PHASE-EQUILIBRIA; CRITICAL EXPONENTS; CROSSOVER; BEHAVIOR; TEMPERATURES; SIMULATIONS AB To describe thermodynamic properties of fluid mixtures near to and far from the vapor-liquid critical point, we need a method where a classical equation-of-state is augmented with a correction based on renormalization group (RG) theory. The advantage of the method described here is that, subject to well-defined assumptions, it can be applied not only to binary mixtures but to mixtures containing any number of components. While our method is based on White's recursion procedure, our extension to mixtures is based on the isomorphism assumption and on an approximation suggested by Kiselev. To illustrate, calculations are presented for the critical loci of some alkane mixtures containing one discrete component and one pseudo-component whose composition is characterized by a continuous distribution of molecular weight. While critical loci calculated with the RG correction are similar to those calculated by the classical equation-of-state alone, inclusion of the RG correction provides better agreement with experiment. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Prausnitz, JM (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EM prausnit@cchem.berkeley.edu NR 54 TC 29 Z9 33 U1 3 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAY 28 PY 2004 VL 219 IS 2 BP 205 EP 217 DI 10.1016/j.fluid.2004.01.033 PG 13 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA 822DR UT WOS:000221516300012 ER PT J AU Yamada, NA Hinz, JM Kopf, VL Segalle, KD Thompson, LH AF Yamada, NA Hinz, JM Kopf, VL Segalle, KD Thompson, LH TI XRCC3 ATPase activity is required for normal XRCC3-Rad51C complex dynamics and homologous recombination SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID DNA STRAND EXCHANGE; 5 RAD51 PARALOGS; CHROMOSOMAL INSTABILITY; MAMMALIAN-CELLS; REPAIR GENE; PROTEIN; HYDROLYSIS; STABILITY; BINDING; MUTANTS AB Homologous recombinational repair preserves chromosomal integrity by removing double-strand breaks, cross-links, and other DNA damage. In eukaryotic cells, the Rad51 paralogs (XRCC2/3, Rad51B/C/D) are involved in this process, although their exact functions are largely undetermined. All five paralogs contain ATPase motifs, and XRCC3 exists in a single complex with Rad51C. To examine the function of this Rad51C-XRCC3 complex, we generated mammalian expression vectors that produce human wild-type XRCC3 or mutant XRCC3 with either a nonconservative mutation (K113A) or a conservative mutation (K113R) in the GKT Walker A box of the ATPase motif. The three vectors were independently transfected into Xrcc3-deficient irs1SF Chinese hamster ovary cells. Wild-type XRCC3 complemented irs1SF cells, albeit to varying degrees, whereas ATPase mutants had no complementing activity, even when the mutant protein was expressed at comparable levels to that in wild-type-complemented clones. Because of dysfunction of the mutants, we propose that ATP binding and hydrolyzing activities of XRCC3 are essential. We tested in vitro complex formation by wild-type and mutant XRCC3 with His6-tagged Rad51C upon co-expression in bacteria, nickel-affinity purification, and Western blotting. Wild-type and K113A mutant XRCC3 formed stable complexes with Rad51C and co-purified with Rad51C, whereas the K113R mutant did not and was predominantly insoluble. The addition of 5 mM ATP but not ADP also abolished complex formation by the wild-type proteins. These results suggest that XRCC3 probably regulates the dissociation and formation of Rad51C-XRCC3 complex through ATP binding and hydrolysis with both processes being essential for the ability of the complex to participate in homologous recombinational repair. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. RP Thompson, LH (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. EM thompson14@llnl.gov FU NCI NIH HHS [P01 CA92584-02] NR 30 TC 23 Z9 24 U1 1 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAY 28 PY 2004 VL 279 IS 22 BP 23250 EP 23254 DI 10.1074/jbc.M402247200 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822WI UT WOS:000221570900057 PM 15037616 ER PT J AU Alam, N Stieglitz, KA Caban, MD Gourinath, S Tsuruta, H Kantrowitz, ER AF Alam, N Stieglitz, KA Caban, MD Gourinath, S Tsuruta, H Kantrowitz, ER TI 240s loop interactions stabilize the T state of Escherichia coli aspartate transcarbamoylase SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID BISUBSTRATE ANALOG N-(PHOSPHONACETYL)-L-ASPARTATE; PHOSPHONACETYL-L-ASPARTATE; RAY SOLUTION SCATTERING; CRYSTAL-STRUCTURES; RESIDUES 230-245; HETEROTROPIC INTERACTIONS; ALLOSTERIC INTERACTIONS; QUATERNARY STRUCTURE; REGULATORY CHAIN; EFFECTOR BINDING AB Here the functional and structural importance of interactions involving the 240s loop of the catalytic chain for the stabilization of the T state of aspartate transcarbamoylase were tested by replacement of Lys-244 with Asn and Ala. For the K244A and K244N mutant enzymes, the aspartate concentration required to achieve half-maximal specific activity was reduced to 8.4 and 4.0 mM, respectively, as compared with 12.4 mM for the wild-type enzyme. Both mutant enzymes exhibited dramatic reductions in homotropic cooperativity and the ability of the heterotropic effectors to modulate activity. Small angle x-ray scattering studies showed that the unligated structure of the mutant enzymes, and the structure of the mutant enzymes ligated with N-phosphonacetyl-L-aspartate, were similar to that observed for the unligated and N-phosphonacetyl-L-aspartate-ligated wild-type enzyme. A saturating concentration of carbamoyl phosphate alone has little influence on the small angle x-ray scattering of the wild-type enzyme. However, carbamoyl phosphate was able to shift the structure of the two mutant enzymes dramatically toward R, establishing that the mutations had destabilized the T state of the enzyme. The x-ray crystal structure of K244N enzyme showed that numerous local T state stabilizing interactions involving 240s loop residues were lost. Furthermore, the structure established that the mutation induced additional alterations at the subunit interfaces, the active site, the relative position of the domains of the catalytic chains, and the allosteric domain of the regulatory chains. Most of these changes reflect motions toward the R state structure. However, the K244N mutation alone only changes local conformations of the enzyme to an R-like structure, without triggering the quaternary structural transition. These results suggest that loss of cooperativity and reduction in heterotropic effects is due to the dramatic destabilization of the T state of the enzyme by this mutation in the 240s loop of the catalytic chain. C1 Boston Coll, Merkert Chem Ctr, Dept Chem, Chestnut Hill, MA 02467 USA. Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Kantrowitz, ER (reprint author), Boston Coll, Merkert Chem Ctr, Dept Chem, Chestnut Hill, MA 02467 USA. EM evan.kantrowitz@bc.edu FU NCRR NIH HHS [P41RR01209]; NIGMS NIH HHS [GM26237] NR 55 TC 4 Z9 4 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAY 28 PY 2004 VL 279 IS 22 BP 23302 EP 23310 DI 10.1074/jbc.M401637200 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822WI UT WOS:000221570900064 PM 15014067 ER PT J AU Saridakis, V Yakunin, A Xu, XH Anandakumar, P Pennycooke, M Gu, J Cheung, F Lew, JM Sanishvili, R Joachimiak, A Arrowsmith, CH Christendat, D Edwards, AM AF Saridakis, V Yakunin, A Xu, XH Anandakumar, P Pennycooke, M Gu, J Cheung, F Lew, JM Sanishvili, R Joachimiak, A Arrowsmith, CH Christendat, D Edwards, AM TI The structural basis for methylmalonic aciduria - The crystal structure of archaeal ATP: Cobalamin adenosyltransferase SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID SALMONELLA-TYPHIMURIUM; METHANOBACTERIUM-THERMOAUTOTROPHICUM; CORRINOID ADENOSYLTRANSFERASE; COMPLEMENTATION GROUP; METHIONINE SYNTHASE; GENE; IDENTIFICATION; VITAMIN-B-12; BIOSYNTHESIS; MUTANT AB ATP: cobalamin adenosyltransferase MMAB was recently identified as the gene responsible for a disorder of cobalamin metabolism in humans (cblB complementation group). The crystal structure of the MMAB sequence homologue from Thermoplasma acidophilum (TA1434; GenBank(TM) identification number gi\16082403) was determined to a resolution of 1.5 Angstrom. TA1434 was confirmed to be an ATP: cobalamin adenosyltransferase, which depended absolutely on divalent metal ions (Mg2+ >Mn2+ > Co2+) and only used ATP or dATP as adenosyl donors. The apparent K-m of TA1434 was 110 muM (k(cat) = 0.23 s(-1)) for ATP, 140 muM ( k(cat) = 0.11 s(-1)) for dATP, and 3 muM ( k(cat) = 0.18 s(-1)) for cobalamin. TA1434 is a trimer in solution and in the crystal structure, with each subunit composed of a five-helix bundle. The location of disease-related point mutations and other residues conserved among the homologues of TA1434 suggest that the active site lies at the junctions between the subunits. Mutations in TA1434 that correspond to the disease-related mutations resulted in proteins that were inactive for ATP: cobalamin adenosyltransferase activity in vitro, confirming that these mutations define the molecular basis of the human disease. C1 Univ Toronto, Banting & Best Dept Med Res, CH Best Inst, Toronto, ON M5G 1L6, Canada. Univ Toronto, Struct Genom Consortium, Toronto, ON M5G 1L6, Canada. Univ Hlth Network, Clin Genom Ctr, Toronto, ON M5G 1L7, Canada. Argonne Natl Lab, Struct Biol Ctr, Biosci Div, Argonne, IL 60439 USA. Univ Toronto, Dept Med Biophys, Toronto, ON M5G 2M9, Canada. Univ Toronto, Ontario Canc Inst, Div Mol & Struct Biol, Toronto, ON M5G 2M9, Canada. Univ Toronto, Dept Bot, Toronto, ON M5S 3B2, Canada. RP Edwards, AM (reprint author), Univ Toronto, Banting & Best Dept Med Res, CH Best Inst, 112 Coll St, Toronto, ON M5G 1L6, Canada. EM aled.edwards@utoronto.ca RI Yakunin, Alexander/J-1519-2014; OI Yakunin, Alexander/0000-0003-0813-6490 NR 22 TC 29 Z9 31 U1 1 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAY 28 PY 2004 VL 279 IS 22 BP 23646 EP 23653 DI 10.1074/jbc.M401395200 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822WI UT WOS:000221570900106 PM 15044458 ER PT J AU Casjens, S Winn-Stapley, DA Gilcrease, EB Morona, R Kuhlewein, C Chua, JEH Manning, PA Inwood, W Clark, AJ AF Casjens, S Winn-Stapley, DA Gilcrease, EB Morona, R Kuhlewein, C Chua, JEH Manning, PA Inwood, W Clark, AJ TI The chromosome of Shigella flexneri bacteriophage Sf6: Complete nucleotide sequence, genetic mosaicism, and DNA packaging SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE bacteriophage Sf6; mosaic genome; evolution; DNA packaging ID GLUCOSYL TRANSFERASE GENE; TEMPERATE BACTERIOPHAGE; INSERTION SEQUENCES; ESCHERICHIA-COLI; GENOMIC SEQUENCE; SHIGA TOXIN; IN-VIVO; SALMONELLA; EVOLUTION; ANTIGEN AB Shigella flexneri temperate bacteriophage Sf6 is of interest in part because its prophage expresses the oac gene that alters the antigenic properties of the surface O-antigen polysaccharide of its host bacterium. We have determined the complete sequence of its 39,044 bp genome. The sequence shows that Sf6 is a member of the canonical lambdoid phage group, and like other phages of this type has a highly mosaic genome. It has chromosomal regions that encode proteins >80% identical with at least 15 different previously characterized lambdoid phages and prophages, but 43% of the genome, including the virion assembly genes, is homologous to the genome of one phage, HK620. An analysis of the nucleotide differences between Sf6 and HK620 indicates that even these similar regions are highly mosaic. This mosaicism suggests ways in which the virion structural proteins might interact with each other. The Sf6 early operons are arranged like a typical lambdoid phage, with "boundary sequences" often found between functional modules in the "metabolic" genome domain. By virtue of high degree of similarity in the encoding genes and their DNA target sites, we predict that the integrase, early transcription anti-terminator, CI and Cro repressors, and CII protein of Sf6 have DNA binding specificities very similar to the homologous proteins encoded by phages HK620,lambda, 434 and P22, respectively. The late operon contains two tRNA genes. The Sf6 terminase genes are unusual. Analysis of in vivo initiation of the DNA packaging series showed that the Sf6 apparatus that recognizes DNA for packaging appears to cleave DNA for initiation of packaging series at many sites within a large region of about 1800 bp that includes a possible pac site. This is unlike previously characterized phage packaging mechanisms. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ Utah, Sch Med, Dept Pathol, Salt Lake City, UT 84132 USA. Univ Adelaide, Dept Mol Biosci, Adelaide, SA 5005, Australia. Lawrence Berkeley Natl Lab, Div Life Sci, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. RP Casjens, S (reprint author), Univ Utah, Sch Med, Dept Pathol, Salt Lake City, UT 84132 USA. EM sherwood.casjens@path.utah.edu FU NIAID NIH HHS [AI05371] NR 80 TC 81 Z9 88 U1 0 U2 8 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAY 28 PY 2004 VL 339 IS 2 BP 379 EP 394 DI 10.1016/j.jmb.2004.03.068 PG 16 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822SZ UT WOS:000221561800011 PM 15136040 ER PT J AU Xiang, T Liu, Q Deacon, AM Koshy, M Kriksunov, IA Lei, XG Hao, Q Thiel, DJ AF Xiang, T Liu, Q Deacon, AM Koshy, M Kriksunov, IA Lei, XG Hao, Q Thiel, DJ TI Crystal structure of a heat-resilient phytase from Aspergillus fumigatus, carrying a phosphorylated histidine SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE A. fumigatus phytase; crystal structure; heat-resistant; covalent reaction intermediate; protein engineering ID PROSTATIC-ACID-PHOSPHATASE; THERMOSTABILITY; ENZYME; SUBSTITUTIONS; MUTAGENESIS; REFINEMENT; RESOLUTION; STABILITY; GENE AB In order to understand the structural basis for the high thermostability of phytase from Aspergillus fumigatus, its crystal structure was determined at 1.5 Angstrom resolution. The overall fold resembles the structure of other phytase enzymes. Aspergillus niger phytase shares 66% sequence identity, however, it is much less heat-resistant. A superimposition of these two structures reveals some significant differences. In particular, substitutions with polar residues appear to remove repulsive ion pair interactions and,, instead form hydrogen bond interactions, which stabilize the enzyme; the formation of a C-terminal helical capping, induced by arginine residue substitutions also appears to be critical for the enzyme's ability to refold to its active form after denaturation at high temperature. The heat-resilient property of A. fumigatus phytase could be due to the improved stability of regions that are critical for the refolding of the protein; and a heat-resistant A. niger phytase may be achieved by mutating certain critical residues with the equivalent residues in A. fumigatus phytase. Six predicted N-glycosylation sites were observed to be glycosylated from the experimental electron density. Furthermore, the enzyme's catalytic residue His59 was found to be partly phosphorylated and thus showed a reaction intermediate, providing structural insight, which may help understand the catalytic mechanism of the acid phosphatase family. The trap of this catalytic intermediate confirms the two-step catalytic mechanism of the acid histidine phosphatase family. (C) 2004 Elsevier Ltd. All rights reserved. C1 Cornell Univ, Dept Mol Biol & Genet, Ithaca, NY 14853 USA. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Cornell Univ, Dept Anim Sci, Ithaca, NY 14853 USA. RP Hao, Q (reprint author), Cornell Univ, Dept Mol Biol & Genet, Ithaca, NY 14853 USA. EM qh22@cornell.edu; djt7@cornell.edu RI Liu, Qun/A-8757-2011; Hao, Quan/C-4304-2009 OI Liu, Qun/0000-0002-1179-290X; NR 31 TC 39 Z9 44 U1 5 U2 13 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAY 28 PY 2004 VL 339 IS 2 BP 437 EP 445 DI 10.1016/j.jmb.2004.03.057 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822SZ UT WOS:000221561800016 PM 15136045 ER PT J AU Chamberlain, AK Lee, Y Kim, S Bowie, JU AF Chamberlain, AK Lee, Y Kim, S Bowie, JU TI Snorkeling preferences foster an amino acid composition bias in transmembrane helices SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE membrane; protein; side-chain; polarity; rotamer ID MEMBRANE-PROTEIN TOPOLOGY; STATISTICAL-ANALYSIS; CHARGED RESIDUES; BACTERIORHODOPSIN LATTICE; SECONDARY STRUCTURE; AMPHIPATHIC HELIX; CRYSTAL-STRUCTURE; STRUCTURAL BASIS; SIDE-CHAINS; ASSOCIATION AB By analyzing transmembrane (TM) helices in known structures, we find that some polar amino acids are more frequent at the N terminus than at the C terminus. We propose the asymmetry occurs because most polar amino acids are better able to snorkel their polar atoms away from the membrane core at the N terminus than at the C terminus. Two findings lead us to this proposition: (1) side-chain conformations are influenced strongly by the N or C-terminal position of the amino acid in the bilayer, and (2) the favored snorkeling direction of an amino acid correlates well with its N to C-terminal composition bias. Our results suggest that TM helix predictions should incorporate an N to C-terminal composition bias, that rotamer preferences of TM side-chains are position-dependent, and that the ability to snorkel influences the evolutionary selection of amino acids for the helix N and C termini. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ Calif Los Angeles, Dept Chem & Biochem, DOE, Ctr Genome & Proteom,Mol Biol Inst, Los Angeles, CA 90095 USA. RP Bowie, JU (reprint author), Univ Calif Los Angeles, Dept Chem & Biochem, DOE, Ctr Genome & Proteom,Mol Biol Inst, Boyer Hall,611 Charles E Young Dr E, Los Angeles, CA 90095 USA. EM bowie@mbi.ucla.edu FU NIGMS NIH HHS [R01 GM63919] NR 55 TC 52 Z9 52 U1 1 U2 13 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAY 28 PY 2004 VL 339 IS 2 BP 471 EP 479 DI 10.1016/j.jmb.2004.03.072 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 822SZ UT WOS:000221561800019 PM 15136048 ER PT J AU Schippers, S Muller, A Phaneuf, RA van Zoest, T Alvarez, I Cisneros, C Emmons, ED Gharaibeh, MF Hinojosa, G Schlachter, AS Scully, SWJ AF Schippers, S Muller, A Phaneuf, RA van Zoest, T Alvarez, I Cisneros, C Emmons, ED Gharaibeh, MF Hinojosa, G Schlachter, AS Scully, SWJ TI Threshold truncation of a 'giant' dipole resonance in photoionization of Ti3+ SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID CONFIGURATION-INTERACTION; CROSS-SECTIONS; IONS AB Photoionization of triply charged titanium ions was investigated using the merged photon-ion beam technique at a synchrotron light source. The experimental photon energy range 42.6-49.4 eV encompasses the threshold for the photoionization of Ti3+(3p(6) 3d D-2(3/2)) ground-state ions at 43.267 eV. Prominent resonance features due to 3p --> 3d and 3p --> 4s excitations are observed with the strongest one being the 'giant' 3p(5) (3d(2 3) F) F-2 dipole resonance which has a width of 1.5 eV. Since it is located only 0.2 eV above the ionization threshold a cut-off of this resonance is observed in photoionization. By employing the principle of detailed balance the results are compared with an earlier experimental study of the time-reversed Ti4+ photorecombination. The comparison clarifies the giant resonance's role in photorecombination and yields state-selective photoionization and photorecombinaton cross sections on an absolute scale. C1 Univ Giessen, Inst Kernphys, D-35392 Giessen, Germany. Univ Nevada, Dept Phys, Reno, NV 89557 USA. Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, Mexico. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Schippers, S (reprint author), Univ Giessen, Inst Kernphys, Leihgesterner Weg 217, D-35392 Giessen, Germany. EM stefan.e.schippers@strz.uni-giessen.de RI Schippers, Stefan/A-7786-2008; Muller, Alfred/A-3548-2009 OI Schippers, Stefan/0000-0002-6166-7138; Muller, Alfred/0000-0002-0030-6929 NR 20 TC 27 Z9 27 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD MAY 28 PY 2004 VL 37 IS 10 BP L209 EP L216 AR PII S0953-4075(04)78007-4 DI 10.1088/0953-4075/37/10/L02 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 831KR UT WOS:000222193800002 ER PT J AU Caldwell, WA Tamura, N Celestre, RS MacDowell, AA Padmore, HA Geballe, TH Koster, G Batterman, BW Patel, JR AF Caldwell, WA Tamura, N Celestre, RS MacDowell, AA Padmore, HA Geballe, TH Koster, G Batterman, BW Patel, JR TI Shear at twin domain boundaries in YBa2Cu3O7-x SO PHYSICAL REVIEW LETTERS LA English DT Article ID THIN-FILMS; X-RAY; SINGLE-CRYSTALS; ANISOTROPY; EPITAXY; STRAIN; DIFFRACTION; SUBSTRATE; VORTEX AB The microstructure and strain state of twin domains in YBa2Cu3O7-x are discussed based upon synchrotron white-beam x-ray microdiffraction measurements. Intensity variations of the fourfold twin splitting of Laue diffraction peaks are used to determine the twin domain structure. Strain analysis shows that interfaces between neighboring twin domains are strained in shear, whereas the interior of these domains are regions of low strain. These measurements are consistent with the orientation relationships of twin boundaries within and across domains and show that basal plane shear stresses can exceed 100 MPa where twin domains meet. Our results support stress field pinning of magnetic flux vortices by twin domain boundaries. C1 Adv Light Source, Berkeley, CA 94720 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Stanford Synchrotron Radiat Labs, Stanford, CA 94309 USA. Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. RP Caldwell, WA (reprint author), Adv Light Source, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM NTamura@lbl.gov RI MacDowell, Alastair/K-4211-2012; Koster, Gertjan/H-3800-2011 OI Koster, Gertjan/0000-0001-5478-7329 NR 27 TC 6 Z9 6 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 216105 DI 10.1103/PhysRevLett.92.216105 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300034 PM 15245298 ER PT J AU Funsten, HO Ritzau, SM Harper, RW Borovsky, JE Johnson, RE AF Funsten, HO Ritzau, SM Harper, RW Borovsky, JE Johnson, RE TI Energy loss by keV ions in silicon - art. no. 212301 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SURFACE-BARRIER DETECTORS; PULSE-HEIGHT DEFECTS; STOPPING POWER; SLOW PROTONS; HEAVY-IONS; ELECTRON-EMISSION; PHOTODIODES; THRESHOLD; FRAGMENTATION; VELOCITY AB Using silicon photodiodes with an ultrathin passivation layer, the average total energy lost to silicon target electrons (electronic stopping) by incident low energy ions and the recoil target atoms they generate is directly measured. We find that the total electronic energy deposition and the ratio of the total nuclear to electronic stopping powers for the incident ions and their recoils each follow a simple, universal representation, thus enabling systematic prediction of ion-induced effects in silicon. We also observe a velocity threshold at 0.05 a.u. for the onset of electronic stopping. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Virginia, Charlottesville, VA 22904 USA. RP Funsten, HO (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Funsten, Herbert/A-5702-2015 OI Funsten, Herbert/0000-0002-6817-1039 NR 32 TC 20 Z9 20 U1 0 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 213201 DI 10.1103/PhysRevLett.92.213201 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300014 PM 15245278 ER PT J AU Hannon, JB Copel, M Stumpf, R Reuter, MC Tromp, RM AF Hannon, JB Copel, M Stumpf, R Reuter, MC Tromp, RM TI Critical role of surface steps in the alloying of Ge on Si(001) SO PHYSICAL REVIEW LETTERS LA English DT Article ID ENERGY-ELECTRON MICROSCOPY; SI; GROWTH AB Using low-energy electron microscopy, we show that intermixing of Ge on Si(001) during growth is enhanced on stepped surfaces and is hindered on terraces where step flow does not occur. On large terraces we have identified a dramatic and unanticipated structural rearrangement that facilitates intermixing: Pairs of steps spontaneously form and migrate over the surface, leaving alloyed regions in their wake. The driving force for step formation is the entropy gain associated with the enhanced intermixing of Ge. C1 IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Hannon, JB (reprint author), IBM Corp, Div Res, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. NR 15 TC 14 Z9 14 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 216104 DI 10.1103/PhysRevLett.92.216104 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300033 PM 15245297 ER PT J AU Jang, SJ Newton, MD Silbey, RJ AF Jang, SJ Newton, MD Silbey, RJ TI Multichromophoric Forster resonance energy transfer SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHOTOSYNTHETIC PURPLE BACTERIA; ELECTRONIC-STRUCTURE; ANTENNA SYSTEM; COMPLEXES; B850; B800; LH2; MECHANISM; STATES AB The theory of Forster resonance energy transfer is generalized for multichromophoric (MC) and nonequilibrium situations. For the first time, it is clarified that the far-field linear spectroscopic information is insufficient for the determination of the reaction rate and that distance dependence of the rate can vary with the disorder and temperature. Application to a light harvesting complex LH2 reveals the important consequences of a MC structure. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. MIT, Dept Chem, Cambridge, MA 02139 USA. RP Jang, SJ (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM sjang@bnl.gov NR 22 TC 202 Z9 205 U1 3 U2 51 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 218301 DI 10.1103/PhysRevLett.92.218301 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300058 PM 15245322 ER PT J AU Ohmi, K Tawada, M Cai, Y Kamada, S Oide, K Qiang, J AF Ohmi, K Tawada, M Cai, Y Kamada, S Oide, K Qiang, J TI Beam-beam limit in e(+)e- circular colliders SO PHYSICAL REVIEW LETTERS LA English DT Article AB Beam-beam effects limit the luminosity of circular colliders. Once the bunch population exceeds a threshold, the luminosity increases at a slower rate. This phenomenon is called the beam-beam limit. Onset of the beam-beam limit has been analyzed with various simulation methods based on the weak-strong and strong-strong models. We have observed that an incoherent phenomenon is mainly concerned in the beam-beam limit. The simulation have shown that equilibrium distributions of the two colliding beams are distorted from Gaussians when the luminosity is limited. The beam-beam limit is estimated to be xisimilar to0.1 for a B factory with damping time of several thousand turns. C1 KEK, Tsukuba, Ibaraki 3050801, Japan. SLAC, Menlo Pk, CA 94025 USA. LBNL, Berkeley, CA 94720 USA. RP Ohmi, K (reprint author), KEK, 1-1 Oho, Tsukuba, Ibaraki 3050801, Japan. NR 15 TC 8 Z9 8 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 214801 DI 10.1103/PhysRevLett.92.214801 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300021 PM 15245285 ER PT J AU Puzder, A Williamson, AJ Gygi, F Galli, G AF Puzder, A Williamson, AJ Gygi, F Galli, G TI Self-healing of CdSe nanocrystals: First-principles calculations SO PHYSICAL REVIEW LETTERS LA English DT Article ID CADMIUM SELENIDE; ELECTRONIC-STRUCTURE; QUANTUM DOTS; SEMICONDUCTOR CLUSTERS; NANOPARTICLES; CRYSTALLITES; SURFACES; CDTE AB Ab initio calculations of the structural, electronic, and optical properties of CdSe nanoparticles are presented. The atomic structures of the clusters are relaxed both in vacuum and in the presence of surfactant ligands. In both cases, we predict significant geometrical rearrangements of the nanoparticle surface while the wurtzite core is maintained. These reconstructions lead to the opening of an optical gap without the aid of passivating ligands, thus "self-healing" the surface electronic structure. Our calculations also predict the existence of a midgap state responsible for recently observed subband emission. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Puzder, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM williamson10@llnl.gov NR 31 TC 140 Z9 140 U1 6 U2 28 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 217401 DI 10.1103/PhysRevLett.92.217401 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300051 PM 15245315 ER PT J AU Thomas, TN Land, TA Casey, WH DeYoreo, JJ AF Thomas, TN Land, TA Casey, WH DeYoreo, JJ TI Emergence of supersteps on KH2PO4 crystal surfaces SO PHYSICAL REVIEW LETTERS LA English DT Article ID GROWTH; KINETICS; FACES; ADP; MECHANISMS AB In situ AFM investigation of growth on the {100} face of KH2PO4 in the presence of Al(III) and other trivalent metals reveals the emergence of a new type of morphological feature-the superstep. Supersteps, or step bunches consisting of 50-1500 elementary steps, are responsible for growth at all supersaturations and exhibit behavior not predicted by accepted models. The step velocity of the superstep is greater than that of single atomic steps and increases with step height. The steepness of the step riser reaches a limiting value of only 11.8degrees. C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA. Univ Calif Davis, Dept Land Air & Water Resources, Chem Grad Grp, Davis, CA 95616 USA. Univ Calif Davis, Dept Geol, Davis, CA 95616 USA. RP Land, TA (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA. EM land1@llnl.gov NR 15 TC 14 Z9 14 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 216103 DI 10.1103/PhysRevLett.92.216103 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300032 PM 15245296 ER PT J AU van Veenendaal, M Fedro, AJ AF van Veenendaal, M Fedro, AJ TI Comment on "Electron correlation effects in resonant inelastic x-ray scattering of NaV2O5" SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP van Veenendaal, M (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. NR 3 TC 13 Z9 13 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 219701 DI 10.1103/PhysRevLett.92.219701 PG 1 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300062 PM 15245326 ER PT J AU Wieczorek, S Chow, WW AF Wieczorek, S Chow, WW TI Chaos in practically isolated microcavity lasers SO PHYSICAL REVIEW LETTERS LA English DT Article ID COUPLED LASERS; SEMICONDUCTOR-LASERS; SYNCHRONIZATION AB We report that essentially isolated microcavity lasers may interact in the most complicated manner and drive each other chaotic. As the optical isolation between these lasers reaches presently practically attainable limits, instead of approaching independent operation, the lasers exhibit mutually induced chaotic oscillations. The chaos arises from an intricate coupling of the nonlinearities associated with coupled optical resonators and those evolving from the population dynamics in the active region. The investigation is performed using a composite-cavity theory and a class-B description of the gain medium. Bifurcation analysis identifies the source of instabilities and determines their robustness. C1 Sandia Natl Labs, Semicond Mat & Device Sci Dept, Albuquerque, NM 87185 USA. RP Wieczorek, S (reprint author), Sandia Natl Labs, Semicond Mat & Device Sci Dept, POB 5800, Albuquerque, NM 87185 USA. NR 16 TC 11 Z9 11 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 213901 DI 10.1103/PhysRevLett.92.213901 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300017 PM 15245281 ER PT J AU Wilke, RHT Bud'ko, SL Canfield, PC Finnemore, DK Suplinskas, RJ Hannahs, ST AF Wilke, RHT Bud'ko, SL Canfield, PC Finnemore, DK Suplinskas, RJ Hannahs, ST TI Systematic effects of carbon doping on the superconducting properties of Mg(B1-xCx)(2) SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNESIUM DIBORIDE; SUBSTITUTED MGB2; CHEMISTRY AB The upper critical field, H-c2, of Mg(B1-xCx)(2) has been measured in order to probe the maximum magnetic field range for superconductivity that can be attained by C doping. Carbon doped MgB2 filaments were prepared, and for carbon levels below 4% the transition temperatures are depressed by about 1 K/% C and H-c2(T=0) rises by about 5 T/% C. This means that 3.8% C substitution will depress T-c from 39.2 to 36.2 K and raise H-c2(T=0) from 16.0 to 32.5 T. These rises in H-c2 are accompanied by a rise in resistivity at 40 K from about 0.5 to about 10 muOmega cm. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Specialty Mat Inc, Lowell, MA 01851 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. RP Wilke, RHT (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Hannahs, Scott/B-1274-2008; Canfield, Paul/H-2698-2014 OI Hannahs, Scott/0000-0002-5840-7714; NR 19 TC 267 Z9 270 U1 3 U2 37 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 217003 DI 10.1103/PhysRevLett.92.217003 PG 4 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300047 PM 15245311 ER PT J AU Zhang, GP Callcott, TA Woods, GT Lin, L Sales, B Mandrus, D He, J AF Zhang, GP Callcott, TA Woods, GT Lin, L Sales, B Mandrus, D He, J TI Comment on "Electron correlation effects in resonant inelastic x-ray scattering of NaV2O5" - Reply SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Zhang, GP (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RI Mandrus, David/H-3090-2014 NR 4 TC 5 Z9 5 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 28 PY 2004 VL 92 IS 21 AR 219702 DI 10.1103/PhysRevLett.92.219702 PG 1 WC Physics, Multidisciplinary SC Physics GA 824UT UT WOS:000221713300063 ER PT J AU Im, HJ Barnes, CE Dai, S Xue, ZL AF Im, HJ Barnes, CE Dai, S Xue, ZL TI Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels SO TALANTA LA English DT Article DE functional silica gels; mercury(II) separation; hydrolysis of dithioacetals; mercapto ligands ID MODIFIED MESOPOROUS SILICA; SELECTIVE ADSORPTION; METAL-IONS; MERCURY(II); SEPARATION; ADSORBENTS; SORBENTS; SURFACE; HG2+; MONOLAYERS AB Silica gels believed to be grafted with dithioacetal derivatives were recently used for Hg(II) extraction, and were found to selectively remove 94-100% of Hg 21 ions from metal ion mixtures. The current Studies with one derivative suggest that the functional group in the Hg(11) removal is the mercapto (-SH) ligand. The dithioacetal group in (ClCOCH2S)(2)CHPh (2) was hydrolyzed during its reaction with amine (-O)(3)Si(CH2)(3)NH2 (3) grafted on silica gel to give the mercapto ligand (-O)(3)Si-(CH2)(3)NHCOCH2SH (4). The silica gel grafted with the mercapto ligand 4 selectively removed Hg2+ ions with reported high capacities. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Xue, ZL (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM xue@novell.chem.utk.edu RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 37 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-9140 J9 TALANTA JI Talanta PD MAY 28 PY 2004 VL 63 IS 2 BP 259 EP 264 DI 10.1016/j.talanta.2003.10.026 PG 6 WC Chemistry, Analytical SC Chemistry GA 821BK UT WOS:000221434300007 PM 18969426 ER PT J AU Taylor, MGGT Friedel, RHW Reeves, GD Dunlop, MW Fritz, TA Daly, PW Balogh, A AF Taylor, MGGT Friedel, RHW Reeves, GD Dunlop, MW Fritz, TA Daly, PW Balogh, A TI Multisatellite measurements of electron phase space density gradients in the Earth's inner and outer magnetosphere SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE phase space density; magnetotail; energetic electrons ID ENERGETIC PARTICLE SPECTROMETER; RELATIVISTIC ELECTRONS; RADIATION BELT; SOLAR-WIND; GEOMAGNETIC STORM; MAGNETIC STORMS; CLUSTER; ACCELERATION; FLUXES AB The variability of the intensity of energetic (MeV) electrons in the Earth's radiation belts has been a renewed area of interest in recent years, yet a major outstanding question is the origin of these particles. In the current study we attempt to differentiate between local stochastic heating and radial diffusion or transport by investigating whether the plasma sheet contains a sufficient population of energetic electrons to supply relativistic electron enhancements in the Earth's radiation belts by radial transport alone or whether one needs to invoke other more localized acceleration processes. We have ordered the equatorial/central plasma sheet electron data from several satellites (GPS (similar to4 R-E), LANL geosynchronous (GEO) (similar to6.6 R-E), POLAR (similar to8 R-E), and CLUSTER (similar to18 R-E)) in phase space density (PSD). By combining these measurements at a particular value of the first adiabatic invariant, we are able to examine the radial profile of PSD. We present a case study of data from three successive CLUSTER orbits centered on a small to moderate (DST = -40 nT) geomagnetic storm to investigate the storm dynamics of the electron radial phase space gradient in the magnetotail. Our results indicate a steep outward PSD gradient to near geosynchronous orbit (similar totrapping boundary) followed by a fairly flat to moderately rising outward PSD gradient into the plasmasheet near 18 R-E, with CLUSTER PSDs highly dependent on the vicinity of the current sheet. We conclude that for this case, there appears to be a sufficient source of electrons to account for the populations of electrons in the inner magnetosphere (i.e., a positive radial gradient). However, evidence of a local PSD peak located between our GPS and POLAR radial positions suggests we cannot rule out local acceleration mechanisms. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Rutherford Appleton Lab, Div Space Sci, Didcot OX11 0QX, Oxon, England. Univ London Imperial Coll Sci Technol & Med, London SW7, England. Boston Univ, Ctr Space Phys, Boston, MA 02215 USA. Max Planck Inst Aeron, D-37191 Katlenburg Lindau, Germany. RP Taylor, MGGT (reprint author), Los Alamos Natl Lab, POB 1663,MS D466, Los Alamos, NM 87545 USA. EM mggtt@lanl.gov; friedel@lanl.gov; reeves@lanl.gov; m.w.dunlop@rl.ac.uk; fritz@bu.edu; daly@linmpi.mpg.de; a.balogh@ic.ac.uk RI Friedel, Reiner/D-1410-2012; Reeves, Geoffrey/E-8101-2011 OI Friedel, Reiner/0000-0002-5228-0281; Reeves, Geoffrey/0000-0002-7985-8098 NR 34 TC 26 Z9 27 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9380 EI 2169-9402 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 27 PY 2004 VL 109 IS A5 AR A05220 DI 10.1029/2003JA010294 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 827PH UT WOS:000221912300002 ER PT J AU Ugalde, JM Dunietz, B Dreuw, A Head-Gordon, M Boyd, RJ AF Ugalde, JM Dunietz, B Dreuw, A Head-Gordon, M Boyd, RJ TI The spin dependence of the spatial size of Fe(II) and of the structure of Fe(Il)-porphyrins SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID GAUSSIAN-BASIS SETS; CARBONMONOXY-MYOGLOBIN; ELECTRONIC-STRUCTURE; RELATIVE SIZES; RAMAN-SPECTRA; FERMI HOLE; ATOMS; HEMOGLOBIN; DENSITY; HEMOPROTEINS AB The question of why the iron displacement out of the porphyrin plane is enhanced in quintet states of singly ligated iron-porphyrin complexes compared to lower spin states and unligated iron-porphyrin is addressed. The spatial size of the Fe2+ atom is analyzed with respect to different spin states, and it is shown that the ion size decreases with increasing spin state for the d(6) electronic configuration. This contradicts the common belief that the iron out-of-plane location in the quintet state of ligated Fe(II)-porphyrins is due to an increased required space of the iron within the porphyrin ring. Therefore, the singlet, triplet, and quintet ground states of imidazole-ligated iron-porphyrin have been calculated employing density functional theory, and the relevant molecular orbitals have been analyzed. Additional comparison with the unligated iron-porphyrin molecules reveals that the enhanced doming in the quintet state is the result of a combination of the weakening of the iron-ring nitrogen bonds by occupying antibonding orbitals and the repulsion between the imidazole ligand and the porphyrin ring. C1 Euskal Herriko Unibertsitatea, Kimika Fak, Donostia San Sebastian 20018, Euskadi, Spain. Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Dalhousie Univ, Dept Chem, Halifax, NS B3H 4J3, Canada. RP Ugalde, JM (reprint author), Euskal Herriko Unibertsitatea, Kimika Fak, PK 1072, Donostia San Sebastian 20018, Euskadi, Spain. RI Ugalde, Jesus/M-2771-2014 OI Ugalde, Jesus/0000-0001-8980-9751 NR 56 TC 32 Z9 34 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD MAY 27 PY 2004 VL 108 IS 21 BP 4653 EP 4657 DI 10.1021/jp0489119 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 822NE UT WOS:000221546100010 ER PT J AU Tam, CN Trouw, FR Iton, LE AF Tam, CN Trouw, FR Iton, LE TI Inelastic neutron scattering study of the activation of molecular hydrogen in silver-exchanged a zeolite: First step in the reduction to metallic silver at low temperature SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID FAR-INFRARED SPECTROSCOPY; EXTREMELY LOW BARRIER; CRYSTAL-STRUCTURE; ROTATION; COMPLEX; CLUSTERS AB The initial steps in the reduction of Ag+ ions by H-2 to produce metallic silver nanoparticles in silver cation-exchanged type A zeolite has been investigated in a novel way using inelastic neutron scattering (INS) to follow the reaction. The rotational tunneling excitations of the hydrogen adsorbed at low temperature were measured. The neutron scattering spectra show rotational tunneling peaks from the librational ground states of the adsorbed hydrogen. A transition at 0.3 meV is the lowest energy excitation ever observed for hydrogen adsorbed in a zeolite, and is characteristic of a sigma-bond complex between a metal center and molecular hydrogen. The transition is assigned to a chemisorption complex between molecular hydrogen and the Ag-3(2+) linear complex cation that has been proposed in X-ray diffraction studies of dehydrated Ag-A. Rotational tunneling peaks from H-2 molecules physisorbed on individual Ag+ ions located at different sites in the zeolite are also observed. Warming the sample allows the reduction reaction to proceed, causing the rotational tunneling peaks to decrease and disappear irreversibly. New INS features appear that are attributed to H-2 physisorbed on neutral Ag clusters. The results clearly demonstrate that the first step in the reduction of the silver is the formation of an intermediate [Ag32+...H2] complex rather than a dissociative adsorption of hydrogen, and that the reduction reaction proceeds via this complex. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Iton, LE (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM iton@anl.gov NR 20 TC 8 Z9 8 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD MAY 27 PY 2004 VL 108 IS 21 BP 4737 EP 4743 DI 10.1021/jp022695r PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 822NE UT WOS:000221546100019 ER PT J AU Swanson, ES AF Swanson, ES TI Short range structure in the X(3872) SO PHYSICS LETTERS B LA English DT Article ID QUARK-MODEL; MESON; MOLECULES; SCATTERING; CHARMONIUM; STATES AB It is proposed that the newly discovered X(3872) is a J(PC) = 1(++) (D0-D0*) hadronic resonance stabilized by admixtures of omegaJ/psi and rho J/psi. A specific model of the state is constructed and tests of its internal structure are suggested via the predicted decay modes D-0(D) over barD(-0)pi(0), D-0(D) over bar (0)gamma, pi(+)pi(-)J/psi, and pi(+)pi(-)pi(0)J/psi. (C) 2004 Published by Elsevier B.V. C1 Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. EM swansone+@pitt.edu NR 34 TC 315 Z9 321 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD MAY 27 PY 2004 VL 588 IS 3-4 BP 189 EP 195 DI 10.1016/j.physletb.2004.03.033 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 822NJ UT WOS:000221546600006 ER PT J AU Govindaswamy, P Mozharivskyj, YA Kollipara, MR AF Govindaswamy, P Mozharivskyj, YA Kollipara, MR TI Synthesis and characterization of cyclopentadienylruthenium(II) complexes containing N,N '-donor Schiff base ligands: crystal and molecular structure of [(eta(5)-C5H5)Ru(C5H4N-2-CH=N-C6H4-P-OCH3)(PPh3)]PF6 SO POLYHEDRON LA English DT Article DE cyclopentadienyl; Schiff bases; pyridine-2-carboxaldehyde; ruthenium ID X-RAY STRUCTURE; RUTHENIUM(II) COMPLEXES; POLYPYRIDYL LIGANDS; REACTIVITY AB Complexes of the formulae [(eta(5) -C5H5)Ru(PPh3)(C5H5N-2-CH = N-C6H4-p-X)](+) [X = H (2a), CH3 (2b), OCH3 (2c), Cl (2d), NO2 (2e)] and [(eta(5)-C5H5)Ru(PPh3)(C5H5N-2-CH = N-C6H11)](+) (3) were prepared by reacting para-substituted N-(pyrid-2-ylmethylene)-phenylamines(2-PP) and N-(pyrid-2-ylmethylene)cyclohexylamine (2-PC) with [(eta(5)-C5H5)Ru(PPh3)(2)Cl] (1) in methanol. These complexes have been isolated as hexa-fluorophosphate salts. Representative complex 2e has been established by single crystal X-ray diffraction analysis. Complex 2c crystallizes in the orthorhombic space group P-bcn, with a = 21.1560 (11) Angstrom, b = 18.3972 (9) Angstrom and c = 17.5130 (9) Angstrom, V = 6816.3 (6) Angstrom(3) and z = 8. All these complexes were characterized by FT-IR, H-1 NMR and P-31{H-1} NMR spectroscopy. (C) 2004 Elsevier Ltd. All rights reserved. C1 NE Hill Univ, Dept Chem, Shillong 793022, Meghalaya, India. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RP Kollipara, MR (reprint author), NE Hill Univ, Dept Chem, Shillong 793022, Meghalaya, India. EM mrkollipara@yahoo.com NR 31 TC 16 Z9 16 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD MAY 27 PY 2004 VL 23 IS 9 BP 1567 EP 1572 DI 10.1016/j.poly.2004.03.007 PG 6 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA 825SO UT WOS:000221778800009 ER PT J AU Comstock, JM Jakob, C AF Comstock, JM Jakob, C TI Evaluation of tropical cirrus cloud properties derived from ECMWF model output and ground based measurements over Nauru Island SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID RADIATION MEASUREMENT PROGRAM; TROPOPAUSE; RADAR; LIDAR; IMPACTS; SITES AB Cirrus clouds play an important role both radiatively and dynamically in the tropics. Understanding the mechanisms responsible for the formation and persistence of tropical cirrus is an important step in accurately predicting cirrus in forecast and climate models. In this study, we compare ground-based measurements of cloud properties with those predicted by the ECMWF model at a location in the tropical western Pacific. Our comparisons of cloud height and optical depth over an 8 month time period indicate that the model and measurements agree well. The ECMWF model predicts cirrus anvils associated with deep convection during convectively active periods, and also isolated cirrus events that are influenced by large-scale vertical ascent. We also show through examination of an upper tropospheric cirrus case that the model produces tropospheric waves that appear to influence the morphology and maintenance of the cirrus layer. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Bur Meteorol Res Ctr, Melbourne, Vic 3001, Australia. RP Comstock, JM (reprint author), Pacific NW Natl Lab, POB 999 MSIN K9-24, Richland, WA 99352 USA. EM jennifer.comstock@pnl.gov; c.jakob@bom.gov.au RI Jakob, Christian/A-1082-2010 OI Jakob, Christian/0000-0002-5012-3207 NR 18 TC 1 Z9 1 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAY 26 PY 2004 VL 31 IS 10 AR L10106 DI 10.1029/2004GL019539 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 827OK UT WOS:000221909900003 ER PT J AU Yantasee, W Lin, YH Fryxell, GE Alford, KL Busche, BJ Johnson, CD AF Yantasee, W Lin, YH Fryxell, GE Alford, KL Busche, BJ Johnson, CD TI Selective removal of copper(II) from aqueous solutions using fine-grained activated carbon functionalized with amine SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID HEAVY-METALS; COMPETITIVE ADSORPTION; IONS; CADMIUM; ZINC; EQUILIBRIUM; SEPARATION; SORPTION; ISOTHERM; BINDING AB To develop an effective transition-metal-ion adsorbent material, functionalization of amine (-NH2) onto fine-grained activated carbon (AC) was performed via the electrophilic aromatic substitution of nitro (-NO2) groups onto the aromatic backbone of the AC, followed by reduction of -NO2 to -NH2. Fourier transform infrared, Brunauer-Emmett-Teller surface area analysis, gravimetric method, and batch metal ion adsorption experiments were performed in parallel on unmodified AC and amine-functionalized AC (NH2-AC). The competitive adsorption of transition-metal ions (Cd2+, Cu2+, Ni2+, and Pb2+) was measured in batch experiments at PH 2.0-5.8. Metal ions favored the NH2-AC over the unmodified AC. Based on the distribution coefficients (K-d), the NH2-AC had an affinity for metal ions in decreasing order of Cu2+ much greater than Pb2+ > Ni2+ > Cd2+. On the NH2-AC, the copper adsorption equilibrium was reached within 1 min with a saturation loading capacity of 0.86 mmol of Cu/g, 2.5 times greater than that on the unmodified AC. The Langmuir and Redlich-Peterson isotherm models were used successfully to characterize the Cu2+ adsorption isotherms. Having Kd values up to 100 000, the NH2-AC is a useful adsorbent material for removing Cu2+ from aqueous wastes. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Yantasee, W (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM wassana.yantasee@pnl.gov RI Lin, Yuehe/D-9762-2011 OI Lin, Yuehe/0000-0003-3791-7587 NR 31 TC 79 Z9 80 U1 1 U2 19 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD MAY 26 PY 2004 VL 43 IS 11 BP 2759 EP 2764 DI 10.1021/ie030182g PG 6 WC Engineering, Chemical SC Engineering GA 823CA UT WOS:000221586100018 ER PT J AU Kaminska, E Piotrowska, A Golaszewska, K Kruszka, R Kuchuk, A Szade, J Winiarski, A Jasinski, J Liliental-Weber, Z AF Kaminska, E Piotrowska, A Golaszewska, K Kruszka, R Kuchuk, A Szade, J Winiarski, A Jasinski, J Liliental-Weber, Z TI ZnO-GaN tunnel junction for transparent ohmic contacts to p-GaN SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT Symposium on Solid Solutions of the II-IV Compounds-Growth, Characterization and Applications CY OCT 14, 2002 CL Zakopane, POLAND DE semiconductors; surfaces and interfaces; scanning and transmission microscopy; photoelectron spectroscopies ID ELECTRONIC-PROPERTIES; SURFACE AB The fabrication procedure of transparent n(+)-ZnO-p-GaN ohmic junctions has been described. The influence of consecutive technological steps on the electrical. structural and electronic properties of the junction has been studied. The results indicate that the predeposition of An nucleation film plays a crucial role for the final contact properties. The ohmic behaviour is explained in terms of formation of a tunnel n(+)-ZnO-p-GaN junction. (C) 2003 Elsevier B.V. All rights reserved. C1 Inst Electr Mat Technol, PL-02668 Warsaw, Poland. Silesian Univ, PL-40006 Katowice, Poland. Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Kaminska, E (reprint author), Inst Electr Mat Technol, Al Lotnikow 32-46, PL-02668 Warsaw, Poland. EM eliana@ite.waw.pl RI Liliental-Weber, Zuzanna/H-8006-2012; Kaminska, Eliana/C-3086-2013; Kuchuk, Andrian/M-6850-2016 OI Kuchuk, Andrian/0000-0002-0571-6169 NR 12 TC 6 Z9 6 U1 1 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD MAY 26 PY 2004 VL 371 IS 1-2 BP 129 EP 132 DI 10.1016/j.jallcom.2003.06.014 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 822TB UT WOS:000221562000031 ER PT J AU Lyo, SK Huang, DH AF Lyo, SK Huang, DH TI Quantized magneto-thermopower in tunnel-coupled ballistic channels: sign reversal and oscillations SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID POINT CONTACTS; CONDUCTANCE; TRANSPORT; SUBBANDS AB The quantized electron-diffusion thermoelectric power S is studied for a general one-dimensional band structure in ballistic channels with applications to a single-quantum-well channel and tunnel-coupled double-quantum-well channels in a perpendicular magnetic field. We find a field-induced sign reversal of S and oscillations in double-well channels. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. USAF, Res Lab, AFRL VSSS, Kirtland AFB, NM 87117 USA. RP Lyo, SK (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 12 TC 10 Z9 10 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD MAY 26 PY 2004 VL 16 IS 20 BP 3379 EP 3384 AR PII S0953-8984(04)77006-X DI 10.1088/0953-8984/16/20/009 PG 6 WC Physics, Condensed Matter SC Physics GA 828MM UT WOS:000221977400012 ER PT J AU Tinte, S Stachiotti, MG Phillpot, SR Sepliarsky, M Wolf, D Migoni, RL AF Tinte, S Stachiotti, MG Phillpot, SR Sepliarsky, M Wolf, D Migoni, RL TI Ferroelectric properties of BaxSr1-xTiO3 solid solutions obtained by molecular dynamics simulation SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID K PHASE TRANSITION; BARIUM-TITANATE; SRTIO3; SYSTEMS; BATIO3 AB Classical shell-model potentials for describing the complex ferroelectric behaviour of barium titanate and strontium titanate are developed and used to simulate BaxSr1-xTiO3 solid solutions. The temperature versus composition phase diagram is very well described and the local behaviour of the structure and polarization is analysed. It is shown that the ferroelectric properties of the solid solution can be understood in terms of the effects of average density and the local chemical environment. The experimentally observed static dielectric peak broadening around T-c at low x is reproduced in the simulation and seems to be related to the average volume rather than to the local chemical environment. C1 UNR, Inst Ris Rosario, FCEIA, Rosario, Argentina. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA. RP Phillpot, SR (reprint author), Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. EM sphil@mse.ufl.edu RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 24 TC 47 Z9 47 U1 4 U2 25 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD MAY 26 PY 2004 VL 16 IS 20 BP 3495 EP 3506 AR PII S0953-8984(04)73317-2 DI 10.1088/0953-8984/16/20/019 PG 12 WC Physics, Condensed Matter SC Physics GA 828MM UT WOS:000221977400022 ER PT J AU Yin, M Gu, Y Kuskovsky, IL Andelman, T Zhu, Y Neumark, GF O'Brien, S AF Yin, M Gu, Y Kuskovsky, IL Andelman, T Zhu, Y Neumark, GF O'Brien, S TI Zinc oxide quantum rods SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID OPTICAL-PROPERTIES; ZNO NANOWIRES; GROWTH; PHOTOLUMINESCENCE; NANOCRYSTALS; NANORODS C1 Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. Columbia Univ, Mat Res Sci & Engn Ctr, New York, NY 10027 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP O'Brien, S (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. EM so188@columbia.edu RI bartelsdoe, ludwig/F-8008-2011; O'Brien, Stephen/D-7682-2013 NR 17 TC 217 Z9 222 U1 6 U2 50 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 26 PY 2004 VL 126 IS 20 BP 6206 EP 6207 DI 10.1021/ja031696 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 822GK UT WOS:000221526800003 PM 15149198 ER PT J AU Giesbrecht, GR Gordon, JC Clark, DL Hay, PJ Scott, BL Tait, CD AF Giesbrecht, GR Gordon, JC Clark, DL Hay, PJ Scott, BL Tait, CD TI A comparative study of pi-arene-bridged lanthanum arylamide and aryloxide dimers. Solution behavior, exchange mechanisms, and X-ray crystal structures of La-2(NH-2,6-(Pr2C6H3)-Pr-i)(6), La(NH-2,6-(Pr2C6H3)-Pr-i)(3)(THF)(3), and La(NH-2,6-(Pr2C6H3)-Pr-i)(3)(py)(2) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ACTINIDE ALKOXIDE CHEMISTRY; SI-C BONDS; MOLECULAR-STRUCTURE; ORGANOAMIDO-LANTHANOIDS; SANDWICH COMPLEXES; AB-INITIO; LIGANDS; DFT; ND; YTTRIUM AB Reaction of 3 equiv of 2,6-diisopropylaniline with La[N(SiMe3)(2)](3) produces the dimeric species La-2(NHAr)(6) (1). X-ray crystallography reveals a centrosymmetric structure, where the dimeric unit is bridged by intermolecular eta(6)-arene interactions of a unique arylamide ligand attached to an adjacent metal center. Exposure of 1 to THF results in formation of the monomeric tris-THF adduct La(NHAr)3(THF)3 (2), which was shown by X-ray crystallography to maintain a fac-octahedral structure in the solid state. H-1 NMR spectroscopy illustrates that the binding of THF to 1 to form 2 is reversible and removal of THF under vacuum regenerates dimeric 1. Addition of pyridine to 1 yields the monomeric bis-pyridine adduct La(NHAr)(3)(py)(2) (3), which exhibits a distorted trigonal-bipyramidal La metal center. Solution H-1 NMR, IR, and Raman spectroscopy indicate that the pi-arene-bridged dimeric structure of 1 is maintained in solution. Variable-temperature H-1 NMR spectroscopic investigations of 1 are consistent with a monomer-dimer equilibrium at elevated temperature. In contrast, variable-temperature H-1 NMR spectroscopic investigations of the aryloxide analogue La-2(OAr)(6) (4) show that the bridging and terminal aryloxide groups exchange by a mechanism in which the dimeric nature of the compound is retained. Density functional theory (DFT) calculations were carried out on model compounds La-2(OC6H5)(6), La-2(NHC6H5)(6), and (C6H5R)La(XC6H5)(3), where X = O or NH and R = H, OH, or NH2. The formation of eta(6)-arene interactions is energetically favored over monomeric LaX3 (X = OPh or NHPh) with the aryloxide pi-arene interaction being stronger than the arylamide T-arene interaction. Calculation of vibrational frequencies reveals the origin of the observed IR spectral behavior of both La-2(OC6H5)(6) and La-2(NHC6H5)(6), with the higher energy nu(C=C) stretch due to terminal ligands and the lower energy stretch associated with the bridging ligands. C1 Los Alamos Natl Lab, NMT Div, Chem Div, Glenn T Seaborg Inst Transactinium Sci & Theoret, Los Alamos, NM 87545 USA. RP Gordon, JC (reprint author), Los Alamos Natl Lab, NMT Div, Chem Div, Glenn T Seaborg Inst Transactinium Sci & Theoret, POB 1663, Los Alamos, NM 87545 USA. EM john.gordon@science.doe.gov RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 76 TC 26 Z9 26 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 26 PY 2004 VL 126 IS 20 BP 6387 EP 6401 DI 10.1021/ja0398262 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA 822GK UT WOS:000221526800041 PM 15149236 ER PT J AU Wilcoxon, JP Provencio, PP AF Wilcoxon, JP Provencio, PP TI Heterogeneous growth of metal clusters from solutions of seed nanoparticles SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID LIQUID-CHROMATOGRAPHY; OPTICAL-PROPERTIES; SIZE-CONTROL; GOLD AB We describe the solution growth of a series of discrete sized generations of Au nanoparticles by the heterogeneous deposition of atoms onto monodisperse seed nanocrystals. The growth process was studied using size-exclusion chromatography (SEC) and transmission electron microscopy (TEM). The size dispersion of each generation was determined from the SEC elution line widths and the spectral homogeneity of the elution peaks. The heterogeneous deposition of various amounts of Ag on Au nanocrystals and Au on Ag nanocrystals using the same synthetic protocol is also described. The effect of such deposition on the optical absorbance of each generation of larger clusters was measured during SEC using an on-line photodiode array absorbance detector. C1 Sandia Natl Labs, Nanostruct & Adv Mat Chem Dept 1122, Albuquerque, NM 87185 USA. RP Wilcoxon, JP (reprint author), Sandia Natl Labs, Nanostruct & Adv Mat Chem Dept 1122, POB 5800, Albuquerque, NM 87185 USA. EM jpwilco@sandia.gov NR 17 TC 92 Z9 92 U1 1 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 26 PY 2004 VL 126 IS 20 BP 6402 EP 6408 DI 10.1021/ja031622y PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA 822GK UT WOS:000221526800042 PM 15149237 ER PT J AU Ristorcelli, JR Clark, TT AF Ristorcelli, JR Clark, TT TI Rayleigh-Taylor turbulence: self-similar analysis and direct numerical simulations SO JOURNAL OF FLUID MECHANICS LA English DT Article ID THERMAL MIXING LAYER; INSTABILITY; FLOWS AB (D)irect numerical simulations and a self-similar analysis of the single-fluid Boussmesq Rayleigh-Taylor instability and transition to turbulence are used to investigate Rayleigh-Taylor turbulence. The Schmidt, Atwood and bulk Reynolds numbers are Sc = 1. A = 0.01, Re less than or equal to 3000. High-Reynolds-number moment self-similarity, consistent with the the energy cascade interpretation of dissipation, is used to analyse the DNS results. The mixing layer width obeys a differential equation with solution h(t - C-o, h(0)) = (1)/(4)C(o)Agt(2) + rootAgC(o)h(0)(1/2) t + h(0); the result for h(t; C-o, h(0)) is a rigorous consequence of only one ansatz, self-similarity. It indicates an intermediate time regime in which the growth is linear and the importance of a virtual origin. At long time the well-known h similar to (1)/(4)C(o)Agt(2) scaling dominates. The self-similar analysis indicates that the asymptotic growth rate is not universal. The scalings of the second-order moments, their dissipations, and production-dissipation ratios, are obtained and compared to the DNS. The flow is not self-similar in a conventional sense there is no single length scale that scales the flow. The moment similarity method produces three different scalings for the turbulence energy-containing length scale, e, the Taylor microscale, lambda, and the Kolmogorov dissipation scale, eta. The DNS and the self-similar analysis are in accord showing l similar to Agt(2), lambdasimilar tot(1/2) and etasimilar to((A(2)g(2)/v(3))t)(-1/4) achieving self-similar behaviour within three initial eddy turnovers of the inception of the turbulence growth phase at bulk Reynolds numbers in the range of Re = 800-1000 depending on initial conditions. A picture of a turbulence in which the largest scales grow, asymptotically, as t(2) and the smallest scales decrease as t(-1/4), emerges. As a consequence the bandwidth of the turbulence spectrum grows as t(9/4) and is consistent with the R-t(3/4) Kolmogorov scaling law of fully developed stationary turbulent flows. While not all moments are consistent, especially the dissipations and higher-order moments in the edge regions, with the self-similar results it appears possible to conclude that: (i) the turbulence length scales evolve as a power of h(t; C-o, h(0)); (n) alpha, as demonstrated mathematically for self-similar Rayleigh-Taylor turbulence and numerically by the DNS, is not a universal constant; (111) there is statistically significant correlation between decreasing a and lower low-wavenumber loading of the initial spectrum. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ristorcelli, JR (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 26 TC 99 Z9 99 U1 1 U2 17 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD MAY 25 PY 2004 VL 507 BP 213 EP 253 DI 10.1017/S0011221004008008286 PG 41 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 828LT UT WOS:000221975500008 ER PT J AU Berkowitz, CM Jobson, T Jiang, GF Spicer, CW Doskey, PV AF Berkowitz, CM Jobson, T Jiang, GF Spicer, CW Doskey, PV TI Chemical and meteorological characteristics associated with rapid increases of O-3 in Houston, Texas SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article DE pollution; Houston; chemistry ID PHOTOCHEMICAL OZONE PRODUCTION; BOUNDARY-LAYER; UNITED-STATES; RURAL TROPOSPHERE; SOUTHERN OXIDANT; URBAN PLUME; FORMALDEHYDE; AIR; CHEMISTRY; SITE AB We report here on measurements made from the 62nd story of the Williams Tower on the west side of Houston, Texas between 15 August and 15 September 2000. The time series of trace gases differ from those at many other urban sites in having very rapidly increasing spikes of O-3, HCHO, and PAN. Measurements show that the highest O-3 levels in Houston are not always those measured at the surface, and the extreme values may occur aloft. Plumes with high O-3 appear to be produced largely from local sources and to have the potential to form additional O-3. The ozone production efficiency (7 molecules of O-3 produced per molecule of NOx consumed) when DeltaO(3)/Deltat greater than or equal to 20 ppb per 15 min was found to be smaller than estimates made from observations directly downwind of the Ship Channel petrochemical plants (e.g., similar to12). Back trajectories show that simple straight line flow was associated with mean O-3 levels of 56 ppb, in contrast to flow patterns associated with a decrease in wind speed or flow reversal, which were associated with mean values of 63 ppb and extremes in excess of 125ppb. VOC samples taken during periods when DeltaO(3)/Deltat greater than or equal to 20 ppb per 15 min were elevated and in particular light olefins were more than a factor of 7 greater than the corresponding samples collected on other occasions. No significant increase in isoprene at the Williams Tower was associated with these episodes. When air passed over stack emissions in eastern Houston, rich in VOCs, a Lagrangian model simulated O-3 production rates of similar to50 ppb hr(-1). C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Battelle Sci & Technol Int, Columbus, OH 43201 USA. RP Berkowitz, CM (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM carl.berkowitz@pnl.gov OI Jobson, Bertram/0000-0003-1812-9745 NR 29 TC 32 Z9 33 U1 1 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X EI 2169-8996 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD MAY 25 PY 2004 VL 109 IS D10 AR D10307 DI 10.1029/2003JD004141 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 827OQ UT WOS:000221910500001 ER PT J AU Huang, CS Foster, JC Goncharenko, LP Reeves, GD Chau, JL Yumoto, K Kitamura, K AF Huang, CS Foster, JC Goncharenko, LP Reeves, GD Chau, JL Yumoto, K Kitamura, K TI Variations of low-latitude geomagnetic fields and Dst index caused by magnetospheric substorms SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE magnetic storms; substorms; dipolarization; geomagnetic disturbances; ionospheric electric field; Dst index ID INTERPLANETARY MAGNETIC-FIELD; IONOSPHERIC ELECTRIC-FIELDS; SOLAR-WIND VARIATIONS; SUDDEN IMPULSES; DISTURBED CONDITIONS; GEOTAIL OBSERVATIONS; EXPANSION PHASE; STORM; RECONNECTION; PENETRATION AB We present observations of periodic magnetospheric substorms and corresponding ionospheric disturbances. Since the periodic substorms occur during a stable interplanetary magnetic field, we are able to identify which ionospheric signatures are caused solely by substorms. We find that the low-latitude ionospheric electric field perturbation after substorm onsets is eastward on the dayside and westward on the nightside and that the ground magnetometer northward (H) deviations at middle and low latitudes show an increase (a positive bay) after each substorm onset, no matter whether the magnetometers are located on the dayside or on the nightside. The nightside magnetometer H deviations are closely correlated with the inner magnetospheric magnetic field B-z component during the dipolarization process. The Dst index shows a significant increase of 20-40 nT after each substorm onset. We propose that the increase in the magnetometer H field and Dst index in response to substorm onsets is related to the field dipolarization. In this scenario the nightside magnetosphere earthward of the near-Earth neutral line is highly compressed during the dipolarization, and the magnetic flux density within the inner magnetosphere is greatly enhanced, resulting in an increase in the ground magnetometer H component and in Dst. C1 MIT, Haystack Observ, Westford, MA 01886 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Inst Geofis Peru, Radio Observ Jicamarca, Lima, Peru. Kyushu Univ, Space Environm Res Ctr, Fukuoka 8128581, Japan. RP Huang, CS (reprint author), MIT, Haystack Observ, Route 40, Westford, MA 01886 USA. EM cshuang@haystack.mit.edu; jcf@haystack.mit.edu; lpg@haystack.mit.edu; reeves@lanl.gov; chau@geo.igp.gob.pe; yumoto@geo.kyushu-u.ac.jp; kitaken@serc.kyushu-u.ac.jp RI Chau, Jorge/C-7568-2013; Reeves, Geoffrey/E-8101-2011 OI Chau, Jorge/0000-0002-2364-8892; Reeves, Geoffrey/0000-0002-7985-8098 NR 43 TC 38 Z9 39 U1 1 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 25 PY 2004 VL 109 IS A5 AR A05219 DI 10.1029/2003JA010334 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 827PG UT WOS:000221912200002 ER PT J AU Kim, J Koffas, TS Lawrence, CC Somorjai, GA AF Kim, J Koffas, TS Lawrence, CC Somorjai, GA TI Surface structural characterization of protein- and polymer-modified polystyrene microspheres by infrared-visible sum frequency generation vibrational spectroscopy and scanning force microscopy SO LANGMUIR LA English DT Article ID INTERFACIAL WATER-STRUCTURE; BOVINE SERUM-ALBUMIN; SOLID/LIQUID INTERFACE; POLYELECTROLYTE ADSORPTION; HYDROPHOBIC SURFACE; GOLD NANOPARTICLES; SFG; LYSOZYME; IGG; FABRICATION AB Structural investigations of bare and surface-modified polystyrene microspheres (beads) have been carried out by infrared-visible sum frequency generation (SFG) vibrational spectroscopy and scanning force microscopy (SFM). Bead surfaces have been modified by either the covalent linking of immunoglobulin G (IgG) and bovine serum albumin (BSA) or the nonspecific adsorption of a Pluronic surfactant. After surface modification with protein, SFG signals in the aliphatic CH-stretch region are detected at both the buffer/bead and air/bead interfaces, indicating that some amino acid residues in proteins adopt preferred orientations. SFG results indicate that the hydrophobic poly(propylene glycol) moieties in the Pluronic order when adsorbed onto the bead, at both the buffer/bead and air/bead interfaces, whereas hydrophilic poly(ethylene glycol) groups align to a lesser extent. SFG spectra also show that the phenyl rings of bare polystyrene beads in contact with air or buffer are ordered, with a dipole component directed along the surface normal, but become less ordered after the adsorption of either proteins or the polymer. Molecular orientation and ordering at the bead surface affect its hydrophobicity and aggregation behavior. SFM results reveal the formation of nonuniform islands when bare beads with more hydrophobic character are spun-cast onto a silica substrate. In the presence of adsorbed protein, a hexagonal packing of beads, with some defects, is observed, depending on the bulk pH and the type of attached protein. Adsorbed Pluronic causes the beads to aggregate in a disordered fashion, as compared to the behavior of bare and protein-modified beads. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Roche Diagnost Corp, Indianapolis, IN 46250 USA. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM somorjai@socrates.berkeley.edu NR 52 TC 28 Z9 28 U1 1 U2 19 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 25 PY 2004 VL 20 IS 11 BP 4640 EP 4646 DI 10.1021/la0498511 PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 822KE UT WOS:000221537400047 PM 15969176 ER PT J AU Xu, K Russell, AM AF Xu, K Russell, AM TI Texture-strength relationships in a deformation processed Al-Sn metal-metal composite SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE texture; deformation processing; composite; tensile strength; orientation image microscopy ID TIN SINGLE-CRYSTALS; COLD-DRAWN; NB; MICROSTRUCTURE; TITANIUM; YTTRIUM; ALLOYS; WIRES AB A powder mixture of 80 vol.% face centered cubic (fcc) Al and 20 vol.% body centered tetragonal (bct) Sn was heavily deformed by extrusion and swaging to form a composite consisting of Sn filaments in an Al matrix. The fiber texture was determined by orientation imaging microscopy to be <10 0> for the Al and <100> for the Sn. The Sn phase deformed into a convoluted ribbon shape; a microstructure which has usually been attributed to texture of the filaments constraining their deformation to plane strain. Texture in a Sn filament deforming at room temperature is unlikely to limit Sn to a plane straining mode, which suggests that a different mechanism may be producing the ribbon-shape of these filaments. The 290 MPa ultimate tensile strength of the composite was greater than the rule-of-mixtures prediction. Comparisons are made with Al-Nb, Al-Ti and Al-Mg deformation processed metal-metal composites and to various strengthening models for metal-metal composites. (C) 2004 Elsevier B.V. All rights reserved. C1 Iowa State Univ, Ames Lab, Met & Ceram Sci Program, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Xu, K (reprint author), Borg Warner Morse TEC, 3690 Luker Rd, Cortland, NY 13045 USA. EM kxu@morse.bwauto.com OI Russell, Alan/0000-0001-5264-0104 NR 38 TC 5 Z9 5 U1 0 U2 8 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAY 25 PY 2004 VL 373 IS 1-2 BP 99 EP 106 DI 10.1016/j.msea.2003.12.036 PG 8 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 825SS UT WOS:000221779200012 ER PT J AU Keller, MA Venkatraman, TN Thomas, A Deveikis, A LoPresti, C Hayes, J Berman, N Walot, I Padilla, S Johnston-Jones, J Ernst, T Chang, L AF Keller, MA Venkatraman, TN Thomas, A Deveikis, A LoPresti, C Hayes, J Berman, N Walot, I Padilla, S Johnston-Jones, J Ernst, T Chang, L TI Altered neurometabolite development in HIV-infected children - Correlation with neuropsychological tests SO NEUROLOGY LA English DT Article ID MAGNETIC-RESONANCE-SPECTROSCOPY; AIDS DEMENTIA COMPLEX; HUMAN-IMMUNODEFICIENCY-VIRUS; PROTON MR SPECTROSCOPY; METABOLITE ABNORMALITIES; LOCALIZED PROTON; BASAL GANGLIA; HUMAN-BRAIN; IN-UTERO; ENCEPHALOPATHY AB Background: HIV-infected children have abnormal cerebral metabolites, measured by proton MR spectroscopy (H-1-MRS), but how these abnormalities relate to brain function is unclear. Methods: Metabolite concentrations in five brain regions of 20 HIV-infected and 13 control children were measured, and these findings were correlated with age, log(10) plasma viral load, CD4 count, and neuropsychological scores. Results: Compared with control subjects, HIV patients had decreased choline concentration [Cho] in left frontal white matter (LFW) (-12%; p = 0.04); those with high viral load (>5,000 HIV RNA copies/mL) had decreased right basal ganglia (RBG) [Cho] (-15%; p = 0.005), and [Cr] (-13%; p = 0.02). Patients with high viral load also had higher [Cho] in the midfrontal gray matter (MFG) (+25%; p = 0.002) and lower myo-inositol [Ins] in the RBG (-18%; p = 0.04) than patients with low HIV viral load. N-Acetyl aspartate concentration ([NAA]) correlated with age in right frontal white matter (RFW) (r = 0.59, p = 0.04), LFW (r = 0.66, p = 0.02), and right hippocampus (RHIP) (r = 0.69, p = 0.02) only in control subjects. In contrast, [Ins] correlated with age in both RFW and LFW (r = 0.71, p = 0.0006; r = 0.65, p = 0.006) only in the HIV patients. Log(10) plasma viral load correlated positively with [Ins] in RFW (r = 0.54, p = 0.02) and [Cho] in MFG (r = 0.49, p = 0.04). Compared with control subjects, HIV patients had poorer spatial memory (p = 0.045) and delayed spatial memory correlated with [Cho] in RHIP (r = 0.68, p = 0.02). Conclusions: These data suggest that normal brain development may be affected in children infected with HIV at birth, particularly evidenced by the lack of age-related increases in the neuronal marker [NAA]. Early, aggressive treatment of infants with HIV before development of encephalopathy is warranted. C1 Univ Calif Los Angeles, Harbor Res & Educ Inst, Torrance, CA USA. Millers Childrens Hosp, Long Beach, CA USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Keller, MA (reprint author), Univ Calif Los Angeles, Los Angeles Cty Harbor Med Ctr, Dept Pediat, Med Ctr, 1000 W Carson St,Bldg N25,Box 468, Torrance, CA 90509 USA. EM keller@rei.edu RI Thomas, m. albert/A-6176-2012 NR 42 TC 28 Z9 31 U1 1 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0028-3878 J9 NEUROLOGY JI Neurology PD MAY 25 PY 2004 VL 62 IS 10 BP 1810 EP 1817 PG 8 WC Clinical Neurology SC Neurosciences & Neurology GA 823IJ UT WOS:000221603900027 PM 15159483 ER PT J AU McDermott, R Lee, SK ten Haken, B Trabesinger, AH Pines, A Clarke, J AF McDermott, R Lee, SK ten Haken, B Trabesinger, AH Pines, A Clarke, J TI Microtesla MRI with a superconducting quantum interference device SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; FIELD; NMR; RELAXATION; SYSTEM AB MRI scanners enable fast, noninvasive, and high-resolution imaging of organs and soft tissue. The images are reconstructed from NMR signals generated by nuclear spins that precess in a static magnetic field B(0) in the presence of magnetic field gradients. Most clinical MRI scanners operate at a magnetic field B(0) = 1.5 T, corresponding to a proton resonance frequency of 64 MHz. Because these systems rely on large superconducting magnets, they are costly and demanding of infrastructure. On the other hand, low-field imagers have the potential to be less expensive, less confining, and more mobile. The major obstacle is the intrinsically low sensitivity of the low-field NMR experiment. Here, we show that prepolarization of the nuclear spins and detection with a superconducting quantum interference device (SQUID) yield a signal that is independent of B(0), allowing acquisition of high-resolution MRIs in microtesla fields. Reduction of the strength of the measurement field eliminates inhomogeneous broadening of the NMR lines, resulting in enhanced signal-to-noise ratio and spatial resolution for a fixed strength of the magnetic field gradients used to encode the image. We present high-resolution images of phantoms and other samples and T(1)-weighted contrast images acquired in highly inhomogeneous magnetic fields of 132 muT; here, T, is the spin-lattice relaxation time. These techniques could readily be adapted to existing multichannel SQUID systems used for magnetic source imaging of brain signals. Further potential applications include low-cost systems for tumor screening and imaging peripheral regions of the body. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP McDermott, R (reprint author), Natl Inst Stand & Technol, Div 817, 325 Broadway, Boulder, CO 80305 USA. EM robertm@boulder.nist.gov RI Lee, Seung-Kyun/A-3464-2008; Trabesinger, Andreas/J-2008-2016 OI Lee, Seung-Kyun/0000-0001-7625-3141; Trabesinger, Andreas/0000-0003-3078-8399 NR 29 TC 107 Z9 107 U1 5 U2 18 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD MAY 25 PY 2004 VL 101 IS 21 BP 7857 EP 7861 DI 10.1073/pnas.0402382101 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 823ZC UT WOS:000221652000005 PM 15141077 ER PT J AU Ye, M Neuman, SP Meyer, PD AF Ye, M Neuman, SP Meyer, PD TI Maximum likelihood Bayesian averaging of spatial variability models in unsaturated fractured tuff SO WATER RESOURCES RESEARCH LA English DT Article DE stochastic continuum; conceptual model uncertainty; predictive uncertainty; cross validation; drift; predictive performance ID ENVIRONMENTAL SYSTEMS; COVARIANCE-STRUCTURES; CROSS VALIDATION; UNCERTAINTY; PREDICTION; ASSIMILATION; TRANSPORT; FLOW AB Hydrologic analyses typically rely on a single conceptual-mathematical model. Yet hydrologic environments are open and complex, rendering them prone to multiple interpretations and mathematical descriptions. Adopting only one of these may lead to statistical bias and underestimation of uncertainty. Bayesian model averaging (BMA) [Hoeting et al., 1999] provides an optimal way to combine the predictions of several competing models and to assess their joint predictive uncertainty. However, it tends to be computationally demanding and relies heavily on prior information about model parameters. Neuman [2002, 2003] proposed a maximum likelihood version (MLBMA) of BMA to render it computationally feasible and to allow dealing with cases where reliable prior information is lacking. We apply MLBMA to seven alternative variogram models of log air permeability data from single-hole pneumatic injection tests in six boreholes at the Apache Leap Research Site (ALRS) in central Arizona. Unbiased ML estimates of variogram and drift parameters are obtained using adjoint state maximum likelihood cross validation [Samper and Neuman, 1989a] in conjunction with universal kriging and generalized least squares. Standard information criteria provide an ambiguous ranking of the models, which does not justify selecting one of them and discarding all others as is commonly done in practice. Instead, we eliminate some of the models based on their negligibly small posterior probabilities and use the rest to project the measured log permeabilities by kriging onto a rock volume containing the six boreholes. We then average these four projections and associated kriging variances, using the posterior probability of each model as weight. Finally, we cross validate the results by eliminating from consideration all data from one borehole at a time, repeating the above process and comparing the predictive capability of MLBMA with that of each individual model. We find that MLBMA is superior to any individual geostatistical model of log permeability among those we consider at the ALRS. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA. RP Ye, M (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. EM ming.ye@pnl.gov; neuman@hwr.arizona.edu; philip.meyer@pnl.gov RI Ye, Ming/A-5964-2008 NR 56 TC 110 Z9 112 U1 1 U2 18 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY 25 PY 2004 VL 40 IS 5 AR W05113 DI 10.1029/2003WR002557 PG 17 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 827PX UT WOS:000221914000001 ER PT J AU Jacobsohn, LG Averitt, RD Wetteland, CJ Schulze, RK Nastasi, M Daemen, LL Jenei, Z Asoka-Kumar, P AF Jacobsohn, LG Averitt, RD Wetteland, CJ Schulze, RK Nastasi, M Daemen, LL Jenei, Z Asoka-Kumar, P TI Role of intericosahedral chains on the hardness of sputtered boron carbide films SO APPLIED PHYSICS LETTERS LA English DT Article ID RAMAN-SPECTROSCOPY; CRYSTALS; CARBON; ATOMS AB The relationship between the structure and mechanical properties of sputter-deposited boron carbide films was investigated. Changes in the structure induced by annealing were characterized in terms of chemical composition, chemical bonding, and concentrations of defects and trapped impurities. The creation of intericosahedral chains for higher annealing temperatures was revealed by infrared and Raman measurements, and the intensity of the infrared band at 1500 cm(-1) was found to be related to the hardness. The presence of residual trapped Ar atoms and of open-volume defects is insensitive to relatively high annealing temperatures and does not influence the recovery of the hardness. Our results suggest postdeposition annealing as a pathway to enhance the mechanical properties of boron carbide films. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM lgjacob@lanl.gov RI Jenei, Zsolt/B-3475-2011; Lujan Center, LANL/G-4896-2012; OI Jacobsohn, Luiz/0000-0001-8991-3903 NR 17 TC 15 Z9 15 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 24 PY 2004 VL 84 IS 21 BP 4173 EP 4175 DI 10.1063/1.1755841 PG 3 WC Physics, Applied SC Physics GA 820QP UT WOS:000221404700012 ER PT J AU Liu, Y Kireev, V Braiman, Y AF Liu, Y Kireev, V Braiman, Y TI Frequency locking and wavelength tuning of nanosecond pulsed broad-area semiconductor lasers SO APPLIED PHYSICS LETTERS LA English DT Article ID DIODE-LASER; EXTERNAL-CAVITY; INJECTION LOCKING; ARRAY; OPERATION; LINEWIDTH; FEEDBACK AB We discuss experimental results of frequency locking and wavelength tuning of a nanosecond pulsed broad-area semiconductor laser. Nanosecond optical pulses with peak power of 25 W and repetition rates of 4-240 kHz are generated from a broad-area laser. An external cavity with a diffractive grating is used to reduce the linewidth of the laser from over 5 nm to less than 0.1 nm. The wavelength of the pulsed laser is tunable over more than 10 nm. The dependence of the laser linewidth on pulse parameters has been investigated. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Ctr Engn Sci Adv Res, Oak Ridge, TN 37831 USA. RP Liu, Y (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Ctr Engn Sci Adv Res, Oak Ridge, TN 37831 USA. EM liuy2@ornl.gov NR 16 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 24 PY 2004 VL 84 IS 21 BP 4265 EP 4267 DI 10.1063/1.1758782 PG 3 WC Physics, Applied SC Physics GA 820QP UT WOS:000221404700043 ER PT J AU Jang, SP Choi, SUS AF Jang, SP Choi, SUS TI Role of Brownian motion in the enhanced thermal conductivity of nanofluids SO APPLIED PHYSICS LETTERS LA English DT Article ID BOILING HEAT-TRANSFER; NANOPARTICLES; SUSPENSIONS; FLUIDS; WATER AB We have found that the Brownian motion of nanoparticles at the molecular and nanoscale level is a key mechanism governing the thermal behavior of nanoparticle-fluid suspensions ("nanofluids"). We have devised a theoretical model that accounts for the fundamental role of dynamic nanoparticles in nanofluids. The model not only captures the concentration and temperature-dependent conductivity, but also predicts strongly size-dependent conductivity. Furthermore, we have discovered a fundamental difference between solid/solid composites and solid/liquid suspensions in size-dependent conductivity. This understanding could lead to design of nanoengineered next-generation coolants with industrial and biomedical applications in high-heat-flux cooling. (C) 2004 American Institute of Physics. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Hankuk Aviat Univ, Sch Aerosp & Mech Engn, Goyang 412791, Gyeonggi Do, South Korea. RP Jang, SP (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. EM choi@anl.gov NR 19 TC 737 Z9 752 U1 9 U2 90 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 24 PY 2004 VL 84 IS 21 BP 4316 EP 4318 DI 10.1063/1.1756684 PG 3 WC Physics, Applied SC Physics GA 820QP UT WOS:000221404700060 ER PT J AU Yu, KM Walukiewicz, W Wojtowicz, T Lim, WL Liu, X Dobrowolska, M Furdyna, JK AF Yu, KM Walukiewicz, W Wojtowicz, T Lim, WL Liu, X Dobrowolska, M Furdyna, JK TI Direct evidence of the Fermi-energy-dependent formation of Mn interstitials in modulation-doped Ga1-yAlyAs/Ga1-xMnxAs/Ga1-yAlyAs heterostructures SO APPLIED PHYSICS LETTERS LA English DT Article ID CURIE-TEMPERATURE; SEMICONDUCTORS; FERROMAGNETISM; GA1-XMNXAS AB Using ion channeling techniques, we investigate the lattice locations of Mn in Ga1-xMnxAs quantum wells between Be-doped Ga1-yAlyAs barriers. Our earlier results showed that the Curie temperature T-C depends on the growth sequence of the epitaxial layers. A lower T-C was found in heterostructures in which the Ga1-xMnxAs layer is grown after the modulation-doped barrier. Here, we provide direct evidence that this reduction in T-C is directly correlated with an increased formation of magnetically inactive Mn interstitials. The formation of interstitials is induced by a shift of the Fermi energy as a result of the transfer of holes from the barrier to the quantum well during the growth. (C) 2004 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA. EM kmyu@lbl.gov RI Yu, Kin Man/J-1399-2012; Wojtowicz, Tomasz/A-2887-2017 OI Yu, Kin Man/0000-0003-1350-9642; NR 17 TC 19 Z9 19 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 24 PY 2004 VL 84 IS 21 BP 4325 EP 4327 DI 10.1063/1.1758291 PG 3 WC Physics, Applied SC Physics GA 820QP UT WOS:000221404700063 ER PT J AU Sadri, D Sheikh-Jabbari, MM AF Sadri, D Sheikh-Jabbari, MM TI Giant hedge-hogs: spikes on giant gravitons SO NUCLEAR PHYSICS B LA English DT Article ID BRANE DYNAMICS; PENROSE LIMITS AB We consider giant gravitons on the maximally supersymmetric plane-wave background of type IIB string theory. Fixing the light-cone gauge, we deduce the low energy effective light-cone Hamiltonian of the three-sphere giant graviton. At first order, this is a U(1) gauge theory on R x S-3. We place sources in this effective gauge theory. Although non-vanishing net electric charge configurations are disallowed by Gauss' law, electric dipoles can be formed. From the string theory point of view these dipoles can be understood as open strings piercing the three-sphere, generalizing the usual Blons to the giant gravitons (BIGGons). Our results can be used to give a two-dimensional (worldsheet) description of giant gravitons, similar to Poichinski's description for the usual D-branes, in agreement with the discussions of hep-th/0204196. (C) 2004 Elsevier B.V. All rights reserved. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Sadri, D (reprint author), Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA. EM darius@stanford.edu; jabbari@itp.stanford.edu OI Sheikh-Jabbari, M.M./0000-0002-3728-230X NR 39 TC 45 Z9 45 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 24 PY 2004 VL 687 IS 1-2 BP 161 EP 185 DI 10.1016/j.nuclphysb.2004.03.013 PG 25 WC Physics, Particles & Fields SC Physics GA 822TX UT WOS:000221564300008 ER PT J AU Miedaner, A Raebiger, JW Curtis, CJ Miller, SM DuBois, DL AF Miedaner, A Raebiger, JW Curtis, CJ Miller, SM DuBois, DL TI Thermodynamic studies of [HPt(EtXantphos)(2)](+) and [(H)(2)Pt(EtXantphos)(2)](2+) SO ORGANOMETALLICS LA English DT Article ID HYDRIDE DONOR ABILITIES; TRANSITION-METAL COMPLEXES; DIHYDROGEN COMPLEXES; CARBONYL HYDRIDES; PERIODIC TRENDS; COORDINATION-COMPOUNDS; ELECTRODE-POTENTIALS; DIPHOSPHINE LIGANDS; FORMYL COMPLEXES; REDUCING AGENTS AB [HPt(EtXantphos)(2)](PF6) (where EtXantphos is 9,9-dimethyl-4,5-bis(diethylphosphino)-xanthene) can be prepared by the reduction of Pt(COD)Cl-2 (where COD is 1,4-cyclooctadiene) with hydrazine in the presence of 2 equiv of the diphosphine ligand followed by exchange of Cl- with PF6-. Deprotonation of [HPt(EtXantphos)(2)](PF6) (pK(a) = 27.3 in acetonitrile) leads to the formation of Pt(EtXantphos)(2), which has been characterized by an X-ray diffraction study. Pt(EtXantphos)(2) has a distorted tetrahedral geometry. The average chelate bite angle is 108.2degrees, and the dihedral angle between the two planes formed by the phophorus atoms of each diphophine ligand and platinum is 80.4degrees. Protonation of [HPt(EtXantphos)(2)](+) results in the formation of [(H)(2)Pt(EtXantphos)(2)](2+), which has a pK(a) of 6.8 in acetonitrile. Oxidation of Pt(EtXantphos)(2) with ferrocenium tetrafluoroborate produces [Pt(EtXantphos)(2)](2+). [Pt(EtXantphos)(2)](2+) undergoes two reversible one-electron reductions (E-1/2(II/I) = -0.81 V versus ferrocene and E-1/2(I/O) = -0.97 V), and [HPt(EtXantphos)(2)](+) undergoes a reversible one-electron oxidation (E-1/2(II/III) = +0.23 V). These half-wave potentials and the pK(a) values of [HPt(EtXantphos)(2)](+) and [(H)(2)Pt(EtXantphos)(2)](2+) have been used to calculate five additional homolytic and heterolytic bond-dissociation free energies for these two hydride species and for [HPt(EtXantphos)(2)](2+). The extensive thermodynamic characterization of this hydride system provides useful insights into the factors controlling the reactivity of these complexes. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA. RP DuBois, DL (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM dan_dubois@nrel.gov NR 66 TC 41 Z9 41 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAY 24 PY 2004 VL 23 IS 11 BP 2670 EP 2679 DI 10.1021/om034238i PG 10 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 822HD UT WOS:000221528900019 ER PT J AU Chen, MJ Klingler, RJ Rathke, JW Kramarz, KW AF Chen, MJ Klingler, RJ Rathke, JW Kramarz, KW TI In situ high-pressure NMR studies of Co-2(CO)(6)[P(p-CF3C6H4)(3)](2) in supercritical carbon dioxide: Ligand substitution, hydrogenation, and hydroformylation reactions SO ORGANOMETALLICS LA English DT Article ID HOMOGENEOUS CATALYSIS; CARBONYLATION AB The dimeric cobalt complex Co-2(CO)(6)[P(p-CF3C6H4)(3)](2) (1) reacts reversibly with hydrogen to produce HCo(CO)(3)[P(p-CF3C6H4)(3)] (4). The carbonyl and the phosphine ligands of both 1 and 4 are very labile. Compound 1 reacts with CO to give Co-2(CO)(7)[P(p-CF3C6H4)(3)] (2), and compound 4 reacts with CO and P(p-CF3C6H4)(3) (L) to give HCo(CO)(4) (5) and HCo(CO)(2)[P(PCF3C6H4)(3)](2) (6), respectively. The P-31 NMR studies show that, in the presence of 1, the line width of the P-31 resonance of L is temperature dependent, and at constant temperature, its broadening is proportional to the square root of the concentration of 1. This broadening is attributed to its exchange reaction with the mononuclear cobalt radical (CO)(3)LCo. (3), which is generated by the homolysis of 1. Compound 1 catalyzes the hydroformylation of olefins in supercritical carbon dioxide. In contrast to the unsubstituted Co-2(CO)(8), the phosphine-modified catalyst system is stable under low CO pressures and the hydroformylation reactions can be carried out at low pressures. In situ monitoring of P-31 and Co-59 NMR spectra of the solution shows that the phosphine-containing hydrido cobalt complexes 4 and 6 are the only hydrido cobalt complexes present in detectable concentrations in 1-catalyzed hydroformylation reactions; nevertheless, the possibility that the observed activity for 1 comes primarily from the more active HCo(CO)(4), present in concentrations below detectable limits, has not been rigorously excluded. C1 Argonne Natl Lab, Chem Technol Div, Argonne, IL 60439 USA. Sunoco Chem, Pittsburgh, PA 15219 USA. RP Chen, MJ (reprint author), Argonne Natl Lab, Chem Technol Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 21 TC 20 Z9 21 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAY 24 PY 2004 VL 23 IS 11 BP 2701 EP 2707 DI 10.1021/om030600h PG 7 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 822HD UT WOS:000221528900023 ER PT J AU Jha, SK Sohn, YH Sastri, S Gunda, N Haynes, JA AF Jha, SK Sohn, YH Sastri, S Gunda, N Haynes, JA TI Al-O-N based duplex coating system for improved oxidation resistance of superalloys and NiCrAlY coatings SO SURFACE & COATINGS TECHNOLOGY LA English DT Article DE oxidation; thermally grown oxide; coatings; residual stress; photostimulate luminescence ID THERMAL BARRIER COATINGS; PHOTO-STIMULATED LUMINESCENCE; ISOTHERMAL OXIDATION; SCALE ADHESION; ALLOYS; ALUMINA; SPALLATION; MECHANISM; PLATINUM; FAILURE AB Performance of an Al-O-N based duplex coating system (DCS) was examined in order to improve the high-temperature oxidation resistance of superalloys and the low-pressure plasma sprayed NiCrAlY coatings. The DCS (similar to5 mum thick) was deposited using pulsed DC reactive magnetron sputtering as an external coating on Rene'N5 superalloy with and without NiCrAlY coating. DCS coatings were characterized using photo-stimulated luminescence spectroscopy, optical microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy before and after high-temperature oxidation. As-deposited DCS contained varying amounts of alpha-, gamma-Al2O3 and amorphous phases depending on the chemistry and surface characteristics of the substrate. Heat treatment at 1121 degreesC (2050 degreesF) for 2 h in air facilitated complete phase transformation to equilibrium alpha-Al2O3 in the DCS. Improvement in oxidation resistance was observed or DCS specimens during 250-h oxidation at 1121 degreesC (2050 degreesF). In particular, DCS was found to be very effective as an external coating on the rough (as-sprayed) NiCrAlY surface. The superior oxidation resistance of the specimens with DCS may be attributed to the formation of slow-growing and adherent alumina scale and the prevention of Ni/Cr-rich oxide formation. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32826 USA. Surmet Corp, Burlington, MA 01803 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Sohn, YH (reprint author), Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32826 USA. EM ysohn@mail.ucf.edu RI Sohn, Yongho/A-8517-2010 OI Sohn, Yongho/0000-0003-3723-4743 NR 39 TC 10 Z9 12 U1 1 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD MAY 24 PY 2004 VL 183 IS 2-3 BP 224 EP 232 DI 10.1016/j.surfcoat.2003.09.044 PG 9 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 822CM UT WOS:000221512300014 ER PT J AU Anders, A AF Anders, A TI Fundamentals of pulsed plasmas for materials processing SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT International Conference on Metallurgical Coatings and Thin Films (ICMCTF 2003) CY APR 28-MAY 02, 2003 CL San Diego, CA DE pulsed plasma; sheath; pulsed sputtering ID SOURCE ION-IMPLANTATION; DIAMOND-LIKE CARBON; PHYSICAL VAPOR-DEPOSITION; CATHODIC-ARC; VACUUM-ARC; TEMPORAL DEVELOPMENT; SURFACE MODIFICATION; POWER DENSITIES; MAGNETRON; DISCHARGE AB Pulsed plasmas use much higher power during each pulse compared to continuously operated plasmas. This feature and the appearance of additional new variables such as pulse duty cycle can lead to new, flexible, sometimes enabling processes for surface modification and thin film deposition, as discussed for plasma immersion ion processing, high power pulsed sputtering, thin film deposition with pulsed cathodic arcs and metal plasma immersion ion implantation and deposition. In all of these processes, transient sheaths are of great importance. The fundamentals of plasma sheaths are briefly reviewed. It is argued that the often-considered ion matrix sheath is only an educational case, whereas most realistic transient sheaths obey a time-dependent Child law. The recovery of pulsed sheaths is usually less considered than the formation of sheaths. If the pulse fall time normalized by the inverse ion plasma frequency is much greater than unity, sheath collapse can be simply described by a retreating Child law sheath. In the opposite case, electrons refill the ion space charge and complete recovery of the boundary layer is determined by ambipolar diffusion from the bulk plasma. The case of high power pulsed sputtering is discussed in greater detail, especially the appearance of a kink in the current-voltage characteristic, which changes its slope for current densities exceeding approximately 600 mA/cm(2). It is suggested that high pulse power opens the possibility that self-sputtering can occur during each pulse, especially for target materials of high sputter yield. The necessary condition for self-sputtering is alphabetagamma > 1, where alpha, beta and gamma are the ionization probability, ion return probability and sputter yield, respectively. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 53, Berkeley, CA 94720 USA. EM aanders@lbl.gov RI Anders, Andre/B-8580-2009 OI Anders, Andre/0000-0002-5313-6505 NR 59 TC 78 Z9 80 U1 8 U2 33 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD MAY 24 PY 2004 VL 183 IS 2-3 BP 301 EP 311 DI 10.1016/j.surfcoat.2003.09.049 PG 11 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 822CM UT WOS:000221512300024 ER PT J AU Iyer, SS Anderson, AS Reed, S Swanson, B Schmidt, JG AF Iyer, SS Anderson, AS Reed, S Swanson, B Schmidt, JG TI Synthesis of orthogonal end functionalized oligoethylene glycols of defined lengths SO TETRAHEDRON LETTERS LA English DT Article DE oligoethylene glycols; reduction; membrane anchor ID SELF-ASSEMBLED MONOLAYERS; MULTIVALENT INTERACTIONS; PROTEIN TOXINS; ADSORPTION; SURFACES; LIGANDS; DERIVATIVES; RESONANCE; BEHAVIOR; ROTAXANE AB The synthesis of oligoethylene glycols of defined lengths possessing different end functionalities is described. The utility of these molecules towards the development of a generic membrane anchor is demonstrated. (C) 2004 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Schmidt, JG (reprint author), Los Alamos Natl Lab, Biosci Div, MS E529, Los Alamos, NM 87545 USA. EM jschmidt@lanl.gov OI Schmidt, Jurgen/0000-0002-8192-9940 NR 32 TC 34 Z9 34 U1 1 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0040-4039 J9 TETRAHEDRON LETT JI Tetrahedron Lett. PD MAY 24 PY 2004 VL 45 IS 22 BP 4285 EP 4288 DI 10.1016/j.tetlet.2004.04.004 PG 4 WC Chemistry, Organic SC Chemistry GA 822TW UT WOS:000221564200019 ER PT J AU Kopalko, K Godlewski, M Guziewicz, E Lusakowska, E Paszkowicz, W Domagala, J Dynowska, E Szczerbakow, A Wojcik, A Phillips, MR AF Kopalko, K Godlewski, M Guziewicz, E Lusakowska, E Paszkowicz, W Domagala, J Dynowska, E Szczerbakow, A Wojcik, A Phillips, MR TI Monocrystalline thin films of ZnSe and ZnO grown by atomic layer epitaxy SO VACUUM LA English DT Article; Proceedings Paper CT International Workshop on Surface Physics CY SEP 13-15, 2003 CL Polanica Zdroj, POLAND SP Univ Wroclaw, Inst Expt Phys, Polish State Comm Sci Res DE atomic layer epitaxy; ZnSe; ZnO; synthesis; characterization AB We report on the growth of monocrystalline thin films of ZnSe and ZnO by atomic layer epitaxy by simple reaction between elemental precursors. Structural and optical properties of these films are discussed with reference to the investigations performed with atomic force microscopy, scanning electron microscopy, cathodoluminescence and photolummescence. (C) 2004 Elsevier Ltd. All rights reserved. C1 Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Cardinal S Wyszynski Univ, Coll Sci, Fac Math & Nat Sci, Warsaw, Poland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. UTS, Microstruct Anal Unit, Sydney, NSW, Australia. RP Godlewski, M (reprint author), Polish Acad Sci, Inst Phys, Al Lotnikow 32-46, PL-02668 Warsaw, Poland. EM godlew@ifpan.edu.pl RI Paszkowicz, Wojciech/A-1623-2015; Domagala, Jaroslaw/P-1811-2016; Guziewicz, Elzbieta/S-4910-2016; Godlewski, Marek/S-5288-2016; OI Paszkowicz, Wojciech/0000-0001-6276-088X; Domagala, Jaroslaw/0000-0001-5515-9877; Guziewicz, Elzbieta/0000-0001-6158-5258; Phillips, matthew/0000-0003-1522-9281 NR 7 TC 9 Z9 9 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0042-207X J9 VACUUM JI Vacuum PD MAY 24 PY 2004 VL 74 IS 2 BP 269 EP 272 DI 10.1016/j.vacuum.2003.12.139 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 819VN UT WOS:000221344100027 ER PT J AU Gill, PMW Gordon, MS Head-Gordon, M Radom, L AF Gill, PMW Gordon, MS Head-Gordon, M Radom, L TI John A. Pople (1925-2004) - Remembrance SO JOURNAL OF CHEMICAL PHYSICS LA English DT Biographical-Item C1 Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia. RP Gill, PMW (reprint author), Univ Nottingham, Sch Chem, Univ Pk, Nottingham NG7 2RD, England. RI Gill, Peter/A-1201-2010 OI Gill, Peter/0000-0003-1042-6331 NR 0 TC 2 Z9 2 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 22 PY 2004 VL 120 IS 20 BP 9445 EP 9445 DI 10.1063/1.1757682 PG 1 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 818TV UT WOS:000221268300001 ER PT J AU Tambelli, CC Donoso, JP Magon, CJ Bueno, LA Messaddeq, Y Ribeiro, SJL de Oliveira, LFC Kosacki, I AF Tambelli, CC Donoso, JP Magon, CJ Bueno, LA Messaddeq, Y Ribeiro, SJL de Oliveira, LFC Kosacki, I TI Glass structure and ion dynamics of lead-cadmium fluorgermanate glasses SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID NUCLEAR-SPIN RELAXATION; ELECTRICAL-CONDUCTIVITY; LATTICE-RELAXATION; MAGNETIC-RESONANCE; GERMANATE GLASSES; FLUORIDE GLASSES; SUPERIONIC CONDUCTORS; FLUOROBORATE GLASSES; NMR; CERAMICS AB Glass structure and fluorine motion dynamics are investigated in lead-cadmium fluorgermanate glasses by means of differential scanning calorimetry, Raman scattering, x-ray absorption (EXAFS), electrical conductivity (EC), and F-19 nuclear magnetic resonance (NMR) techniques. Glasses with composition 60PbGeO(3)-xPbF(2)-yCdF(2) (in mol %), with x+y=40 and x=10, 20, 30, 40, are studied. Addition of metal fluorides to the base PbGeO3 glass leads to a decrease of the glass transition temperature (T-g) and to an enhancement of the ionic conductivity properties. Raman and EXAFS data analysis suggest that metagermanate chains form the basic structural feature of these glasses. The NMR study leads to the conclusion that the F-F distances are similar to those found in pure crystalline phases. Experimental results suggest the existence of a heterogeneous glass structure at the molecular scale, which can be described by fluorine rich regions permeating the metagermanate chains. The temperature dependence of the NMR line shapes and relaxation times exhibits the qualitative and quantitative features associated with the high fluorine mobility in these systems. (C) 2004 American Institute of Physics. C1 Univ Sao Paulo, Inst Phys, BR-13560970 Sao Carlos, SP, Brazil. UNESP, Inst Chem, Lab Photon Mat, BR-14801970 Araraquara, SP, Brazil. Univ Fed Juiz de Fora, Inst Ciencias Exatas, BR-36036330 Juiz de Fora, MG, Brazil. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37830 USA. RP Univ Sao Paulo, Inst Phys, POB 369, BR-13560970 Sao Carlos, SP, Brazil. EM donoso@if.sc.usp.br RI Ribeiro, Sidney/E-9864-2012; de Oliveira, Luiz Fernando/E-4632-2013; Donoso, Jose Pedro/G-2892-2013; Sao Carlos Institute of Physics, IFSC/USP/M-2664-2016 OI Ribeiro, Sidney/0000-0002-8162-6747; de Oliveira, Luiz Fernando/0000-0003-0595-8878; Donoso, Jose Pedro/0000-0002-0827-073X; NR 50 TC 11 Z9 11 U1 3 U2 14 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 22 PY 2004 VL 120 IS 20 BP 9638 EP 9647 DI 10.1063/1.1712905 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 818TV UT WOS:000221268300025 PM 15267977 ER PT J AU Tavares, FW Bratko, D Striolo, A Blanch, HW Prausnitz, JM AF Tavares, FW Bratko, D Striolo, A Blanch, HW Prausnitz, JM TI Phase behavior of aqueous solutions containing dipolar proteins from second-order perturbation theory SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID AVERAGED PAIR POTENTIALS; LIGHT-SCATTERING; COLLOIDAL SOLUTIONS; GLOBULAR-PROTEINS; CHARGED COLLOIDS; MEAN-FORCE; EQUILIBRIA; LYSOZYME; EQUATION; CRYSTALLIZATION AB Due to the interplay of Coulombic repulsion and attractive dipolar and van der Waals interactions, solutions of globular proteins display a rich variety of phase behavior featuring fluid-fluid and fluid-solid transitions that strongly depend on solution pH and salt concentration. Using a simple model for charge, dispersion and dipole-related contributions to the interprotein potential, we calculate phase diagrams for protein solutions within the framework of second-order perturbation theory. For each phase, we determine the Helmholtz energy as the sum of a hard-sphere reference term and a perturbation term that reflects both the electrostatic and dispersion interactions. Dipolar effects can induce fluid-fluid phase separation or crystallization even in the absence of any significant dispersion attraction. Because dissolved electrolytes screen the charge-charge repulsion more strongly than the dipolar attraction, the ionic strength dependence of the potential of mean force can feature a minimum at intermediate ionic strengths offering an explanation for the observed nonmonotonic dependence of the phase behavior on salt concentration. Inclusion of correlations between charge-dipole and dipole-dipole interactions is essential for a reliable calculation of phase diagrams for systems containing charged dipolar proteins and colloids. (C) 2004 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Fed Univ Rio De Janeiro, Escola Quim, BR-21949900 Rio De Janeiro, Brazil. RP Prausnitz, JM (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RI Striolo, Alberto/G-2926-2011 NR 46 TC 26 Z9 26 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 22 PY 2004 VL 120 IS 20 BP 9859 EP 9869 DI 10.1063/1.1697387 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 818TV UT WOS:000221268300051 PM 15268003 ER PT J AU Todaka, N Akasaka, C Xu, TF Pruess, K AF Todaka, N Akasaka, C Xu, TF Pruess, K TI Reactive geothermal transport simulations to study the formation mechanism of an impermeable barrier between acidic and neutral fluid zones in the Onikobe Geothermal Field, Japan SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article DE transport simulation; fluid mixing; geothermal reservoir ID MODEL DEVELOPMENT; FLOW; DISSOLUTION; PRECIPITATION; PERMEABILITY; MINERALS; SYSTEMS; QUARTZ; PHASE; GASES AB Two types of fluids are encountered in the Onikobe geothermal reservoir (Japan): one is neutral and the other is acidic. It is hypothesized that acidic fluid might be upwelling along a fault zone from magma and that an impermeable barrier might be present between the acidic and neutral fluid zones. To test such a conceptual model and to study the geochemical behavior due to mixing of the two fluids, reactive geothermal transport simulations under both natural and production conditions were carried out using the code TOUGHREACT. Results indicate Mn-rich smectite precipitates near the mixing front. Precipitation of sphalerite and galena occurs in a similar region as the Mn-rich smectite. Precipitation of these minerals depends on pH and temperature. In addition, quartz, pyrite, and calcite precipitate in the shallow zone resulting in further development of caprock. The changes in porosity and permeability due to precipitation of Mn-rich smectite are small compared with that of quartz, calcite, and pyrite. However, the smectite precipitation is likely to fill open fractures and to form an impermeable barrier between acidic and neutral fluid regions. The simulated mineral assemblage is generally consistent with observations in the Onikobe field. The numerical simulations described here provide useful insight into geochemical behavior and formation of impermeable barriers from fluid mixing. The method presented in this paper may be useful in fundamental analysis of hydrothermal systems and in the exploration of geothermal reservoirs, including chemical evolution, mineral alteration, mineral scaling, and changes in porosity and permeability. C1 Elect Power Dev Co Ltd, Dept Engn, Geothermal Engn Grp, Chuo Ku, Tokyo 1048165, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Elect Power Dev Co Ltd, Dept Engn, Geothermal Engn Grp, Chuo Ku, 6-15-1 Ginza, Tokyo 1048165, Japan. EM norifumi_todaka@jpower.co.jp; tianfu_xu@lbl.gov; k_pruess@lbl.gov NR 25 TC 5 Z9 5 U1 0 U2 7 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAY 21 PY 2004 VL 109 IS B5 AR B05209 DI 10.1029/2003JB002792 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 823LG UT WOS:000221613100001 ER PT J AU Ranatunga, W Hill, EE Mooster, JL Holbrook, EL Schulze-Gahmen, U Xu, WL Bessman, MJ Brenner, SE Holbrook, SR AF Ranatunga, W Hill, EE Mooster, JL Holbrook, EL Schulze-Gahmen, U Xu, WL Bessman, MJ Brenner, SE Holbrook, SR TI Structural studies of the nudix hydrolase DR1025 from Deinococcus radiodurans and its ligand complexes SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE nudix hydrolase; mutT-like; Deinococcus radiodurans; X-ray crystallography ID NUCLEOSIDE TRIPHOSPHATE PYROPHOSPHOHYDROLASE; DIADENOSINE TETRAPHOSPHATE HYDROLASE; ADP-RIBOSE PYROPHOSPHATASE; ESCHERICHIA-COLI; GENOME SEQUENCE; CRYSTAL-STRUCTURE; ADENOSINE (5')-PENTAPHOSPHO-(5')-ADENOSINE; BACILLUS-ANTHRACIS; PROTEIN STRUCTURES; ENZYME AB We have determined the crystal structure, at 1.4 Angstrom, of the Nudix hydrolase DR1025 from the extremely radiation resistant bacterium Deinococcus radiodurans. The protein forms an intertwined homodimer by exchanging N-terminal segments between chains. We have identified additional conserved elements of the Nudix fold, including the metal-binding motif, a kinked beta-strand characterized by a proline two positions upstream of the Nudix consensus sequence, and participation of the N-terminal extension in the formation of the substrate-binding pocket. Crystal structures were also solved of DR1025 crystallized in the presence of magnesium and either a GTP analog or Ap(4)A (both at 1.6 Angstrom resolution). In the Ap(4)A co-crystal, the electron density indicated that the product of asymmetric hydrolysis, ATP, was bound to the enzyme. The GTP analog bound structure showed that GTP was bound almost identically as ATP. Neither nucleoside triphosphate was further cleaved. (C) 2004 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Plant & Microbial Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Johns Hopkins Univ, Dept Biol, Baltimore, MD 21218 USA. RP Holbrook, SR (reprint author), Lawrence Berkeley Lab, Phys Biosci Div, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM srholbrook@lbl.gov RI Brenner, Steven/A-8729-2008 OI Brenner, Steven/0000-0001-7559-6185 FU NHGRI NIH HHS [1K22 HG 00056]; NIGMS NIH HHS [GM 18649] NR 57 TC 20 Z9 21 U1 0 U2 3 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAY 21 PY 2004 VL 339 IS 1 BP 103 EP 116 DI 10.1016/j.jmb.2004.01.065 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 820SG UT WOS:000221409000009 PM 15123424 ER PT J AU Chao, DL Davenport, MP Forrest, S Perelson, AS AF Chao, DL Davenport, MP Forrest, S Perelson, AS TI A stochastic model of cytotoxic T cell responses SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article DE stage-structured modeling; immunological memory; immunology; cytotoxic T lymphocyte ID NON-SELF DISCRIMINATION; LYMPHOCYTIC CHORIOMENINGITIS VIRUS; DYNAMICS IN-VIVO; IMMUNE-SYSTEM; VIRAL-INFECTION; BACTERIAL-INFECTION; RECEPTOR REPERTOIRE; CLONAL SELECTION; COMPUTERIZED MODEL; CUTTING EDGE AB We have constructed a stochastic stage-structured model of the cytotoxic T lymphocyte (CTL) response to antigen and the maintenance of immunological memory. The model follows the dynamics of a viral infection and the stimulation, proliferation, and differentiation of native CD8(+) T cells into effector CTL, which can eliminate virally infected cells. The model is capable of following the dynamics of multiple T cell clones, each with a T cell receptor represented by a digit string. MHC-viral peptide complexes are also represented by strings and a string match rule is used to compute the affinity of a T cell receptor for a viral epitope. The avidities of interactions are also computed by taking into consideration the density of MHC-viral peptides on the surface of an infected cell. Lastly, the model allows the probability of T cell stimulation to depend on avidity but also incorporates the notion of an antigen-independent programmed proliferative response. We compare the model to experimental data on the cytotoxic T cell response to lymphocytic choriomeningitis virus infections. (C) 2004 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Santa Fe Inst, Santa Fe, NM 87501 USA. Univ New S Wales, Prince Wales Hosp, Dept Haematol, Sydney, NSW 2052, Australia. Univ New S Wales, Ctr Vasc Res, Sydney, NSW 2052, Australia. Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA. RP Perelson, AS (reprint author), Los Alamos Natl Lab, T10 MS-K710, Los Alamos, NM 87545 USA. EM asp@lanl.gov OI Chao, Dennis/0000-0002-8253-6321 FU NCRR NIH HHS [R01 RR06555]; NIAID NIH HHS [R37 AI28433] NR 86 TC 60 Z9 62 U1 1 U2 6 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD MAY 21 PY 2004 VL 228 IS 2 BP 227 EP 240 DI 10.1016/j.jtbi.2003.12.011 PG 14 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA 817VQ UT WOS:000221205400007 PM 15094017 ER PT J AU Im, HJ Barnes, CE Dai, S Xue, ZL AF Im, HJ Barnes, CE Dai, S Xue, ZL TI Functionalized sol-gels for mercury(II) separation: a comparison of mesoporous materials prepared with and without surfactant templates SO MICROPOROUS AND MESOPOROUS MATERIALS LA English DT Article DE mesoporous; granular silica gels; mercapto ligand; Hg(II) separation ID ORGANIC-INORGANIC MATERIALS; NUCLEAR-MAGNETIC-RESONANCE; SELECTIVE ADSORPTION; METAL-IONS; SILICA; MONOLAYERS; ADSORBENTS; HG2+; SORBENTS; COMPOSITE AB Granular silica gels 1b (7.0 mol% ligand) and 1c (17.0 mol% ligand) containing different amounts of tethered mercapto ligand HS(CH2)(3)Si(O-)(3) were prepared in one step from the co-hydrolysis of HS(CH2)(3)Si(OMe)(3) and Si(OMe)(4). Analyses of 1b revealed that it was mesoporous (pore diameter: ca. 50 Angstrom) with a large surface area (471 m(2)/g). In 0.5, 5.0, 50, and 500 ppm Hg2+ solutions, 1b was found to have Hg2+ uptake capacities comparable to those of sub-micron mesoporous powders prepared with two different surfactants in the current studies. 1b and 1c removed Hg2+ ions to be below 5 x 10(-5) ppm (the detection limit of atomic absorption) from 0.368 and 50 ppm solutions, respectively. The granular 1b and 1c are easier to prepare and handle, and may offer an alternative to sub-micron powders prepared with surfactants for Hg(II) uptake. (C) 2004 Elsevier Inc. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Xue, ZL (reprint author), Univ Tennessee, Dept Chem, 1600 Circle Dr, Knoxville, TN 37996 USA. EM xue@novell.chem.utk.edu RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 50 TC 43 Z9 43 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-1811 J9 MICROPOR MESOPOR MAT JI Microporous Mesoporous Mat. PD MAY 21 PY 2004 VL 70 IS 1-3 BP 57 EP 62 DI 10.1016/j.micromeso.2004.03.002 PG 6 WC Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 821EU UT WOS:000221444000008 ER PT J AU Lee, B Zhu, HG Zhang, ZT Overbury, SH Dai, S AF Lee, B Zhu, HG Zhang, ZT Overbury, SH Dai, S TI Preparation of bicontinuous mesoporous silica and organosilica materials containing gold nanoparticles by co-synthesis method SO MICROPOROUS AND MESOPOROUS MATERIALS LA English DT Article DE mesoporous silica; gold nanoparticles; sol-gel co-synthesis ID AQUEOUS CHLOROAURATE IONS; CHEMICAL-VAPOR-DEPOSITION; LOW-TEMPERATURE OXIDATION; MOLECULAR-SIEVES; CDS NANOPARTICLES; AU NANOPARTICLES; TEMPLATING FABRICATION; METAL NANOPARTICLES; CATALYTIC-ACTIVITY; CARBON-MONOXIDE AB Catalytic activities of gold strongly depend on its particle size. It is necessary to have homogeneous distributions of small gold nanoparticles with diameters between 2 and 5 nm for excellent catalytic activities. In this study, gold-containing mesoporous silica materials were prepared by a co-synthesis method. The essence of this sol-gel co-synthesis method is to combine together neutral surfactant template synthesis of mesoporous silica materials with the introduction of metal ions via bifunctional silane ligands, so that the formation of mesostructures and metal-ion doping occur simultaneously. The formation of gold nanoparticles with size less than 5 nm inside mesoporous materials (HMS, MSU, and PMO) has been achieved by this co-synthesis sol-gel process. In addition, the effects of post-treatments, such as calcination and reduction, on pore structures and nanoparticle size distributions were also investigated. (C) 2004 Elsevier Inc. All rights reserved. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, 1 Bethel Rd, Oak Ridge, TN 37831 USA. EM dais@ornl.gov RI Overbury, Steven/C-5108-2016; Dai, Sheng/K-8411-2015 OI Overbury, Steven/0000-0002-5137-3961; Dai, Sheng/0000-0002-8046-3931 NR 67 TC 36 Z9 37 U1 0 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1387-1811 J9 MICROPOR MESOPOR MAT JI Microporous Mesoporous Mat. PD MAY 21 PY 2004 VL 70 IS 1-3 BP 71 EP 80 DI 10.1016/j.micromeso.2004.03.004 PG 10 WC Chemistry, Applied; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 821EU UT WOS:000221444000010 ER PT J AU Herbig, U Jobling, WA Chen, BPC Chen, DJ Sedivy, JM AF Herbig, U Jobling, WA Chen, BPC Chen, DJ Sedivy, JM TI Telomere shortening triggers senescence of human cells through a pathway involving ATM, p53, and p21(CIP1), but not p16(INK4a) SO MOLECULAR CELL LA English DT Article ID ATAXIA-TELANGIECTASIA FIBROBLASTS; HUMAN-DIPLOID FIBROBLASTS; DOUBLE-STRAND BREAKS; DNA-DAMAGE; CELLULAR SENESCENCE; REPLICATIVE SENESCENCE; TRANSCRIPTIONAL ACTIVATION; PREMATURE SENESCENCE; MAMMALIAN TELOMERES; LIFE-SPAN AB Cellular senescence can be triggered by telomere shortening as well as a variety of stresses and signaling imbalances. We used multiparameter single-cell detection methods to investigate upstream signaling pathways and ensuing cell cycle checkpoint responses in human fibroblasts. Telomeric foci containing multiple DNA damage response factors were assembled in a subset of senescent cells and signaled through ATM to p53, upregulating p21 and causing G1 phase arrest. Inhibition of ATM expression or activity resulted in cell cycle reentry, indicating that stable arrest requires continuous signaling. ATR kinase appears to play a minor role in normal cells but in the absence of ATM elicited a delayed G2 phase arrest. These pathways do not affect expression of p16, which was upregulated in a telomere- and DNA damage-independent manner in a subset of cells. Distinct senescence programs can thus progress in parallel, resulting in mosaic cultures as well as individual cells responding to multiple signals. C1 Brown Univ, Dept Biochem Mol Biol & Cell Biol, Providence, RI 02912 USA. Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Sedivy, JM (reprint author), Brown Univ, Dept Biochem Mol Biol & Cell Biol, Providence, RI 02912 USA. EM john_sedivy@brown.edu FU NCI NIH HHS [F32 CA099388, R01 CA50519]; NCRR NIH HHS [P20 RR-15578]; NIA NIH HHS [R01 AG16694, R01 AG18949]; NIGMS NIH HHS [T32 GM-07601] NR 37 TC 603 Z9 632 U1 6 U2 39 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 1097-2765 J9 MOL CELL JI Mol. Cell PD MAY 21 PY 2004 VL 14 IS 4 BP 501 EP 513 DI 10.1016/S1097-2765(04)00256-4 PG 13 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 823GB UT WOS:000221597000013 PM 15149599 ER PT J AU Woo, EJ Kim, YG Kim, MS Han, WD Shin, S Robinson, H Park, SY Oh, BH AF Woo, EJ Kim, YG Kim, MS Han, WD Shin, S Robinson, H Park, SY Oh, BH TI Structural mechanism for inactivation and activation of CAD/DFF40 in the apoptotic pathway SO MOLECULAR CELL LA English DT Article ID DNA FRAGMENTATION; CHROMATIN CONDENSATION; ACTIVE-SITE; INHIBITOR; NUCLEASE; DFF40; CAD; CLEAVAGE; PROTEIN; DOMAIN AB CAD/DFF40 is responsible for the degradation of chromosomal DNA into nucleosomal fragments and subsequent chromatin condensation during apoptosis. It exists as an inactive complex with its inhibitor ICAD/DFF45 in proliferating cells but becomes activated upon cleavage of ICAD/DFF45 into three domains by caspases in dying cells. The molecular mechanism underlying the control and activation of CAD/DFF40 was unknown. Here, the crystal structure of activated CAD/DFF40 reveals that it is a pair of molecular scissors with a deep active-site crevice that appears ideal for distinguishing internucleosomal DNA from nucleosomal DNA. Ensuing studies show that ICAD/DFF45 sequesters the nonfunctional CAD/DFF40 monomer and is also able to disassemble the functional CAD/DFF40 dimer. This capacity requires the involvement of the middle domain of ICAD/DFF45, which by itself cannot remain bound to CAD/DFF40 due to low binding affinity for the enzyme. Thus, the consequence of the caspase-cleavage of ICAD/DFF45 is a self-assembly of CAD/DFF40 into the active dimer. C1 Pohang Univ Sci & Technol, Dept Life Sci, Div Mol & Life Sci, Pohang 790784, Kyungbuk, South Korea. Pohang Univ Sci & Technol, Ctr Biomol Recognit, Pohang 790784, Kyungbuk, South Korea. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. Yokohama City Univ, Prot Design Lab, Yokohama, Kanagawa 2300045, Japan. RP Oh, BH (reprint author), Pohang Univ Sci & Technol, Dept Life Sci, Div Mol & Life Sci, Pohang 790784, Kyungbuk, South Korea. EM bhoh@postech.ac.kr RI Oh, Byung-Ha/C-2061-2011 NR 40 TC 74 Z9 81 U1 0 U2 0 PU CELL PRESS PI CAMBRIDGE PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA SN 1097-2765 J9 MOL CELL JI Mol. Cell PD MAY 21 PY 2004 VL 14 IS 4 BP 531 EP 539 DI 10.1016/S1097-2765(04)00258-8 PG 9 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 823GB UT WOS:000221597000016 PM 15149602 ER PT J AU Pozzi, SA Mullens, JA Mihalczo, JT AF Pozzi, SA Mullens, JA Mihalczo, JT TI Analysis of neutron and photon calibration of plastic (BC-420) and detection position for the liquid (BC-501) scintillators SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE scintillation detector; calibration; neutron detection; photon detection; Monte Carlo ID MCNP-POLIMI; CODE AB In this paper, we present the results of the neutron and photon calibration of a BC-420 plastic scintillator and a BC-501 liquid scintillator using a set of reference gamma sources and a Cf-252 source. The position of neutron and photon interactions inside the scintillators as a function of energy is investigated by Monte Carlo simulation. (C) 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Pozzi, SA (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, POB 2008,MS 6010, Oak Ridge, TN 37831 USA. EM pozzisa@ornl.gov NR 4 TC 32 Z9 32 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 92 EP 101 DI 10.1016/j.nima.2003.12.036 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400009 ER PT J AU Pancin, J Abbondanno, U Aerts, G Alvarez, H Andriamonje, S Angelopoulos, A Assimakopoulos, P Bacri, C Badurek, G Baumann, P Becvar, F Beer, H Benlliure, J Berthier, B Berthoumieux, E Boffi, S Borcea, C Boscolo-Marchi, E Bustreo, N Calvino, F Cano-ott, D Capote, R Carlson, P Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Delbart, A Derre, J Dolfini, R Domingo Pardo, C Duran-Escribano, I Eleftheriadis, C Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Lourenco, L Ferreiramarques, R Frais-Koelbl, H Furman, W Giomataris, Y Goncalves, I Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haight, R Heil, M Herrera-Martinez, A Ioannides, K Janeva, N Jeanneau, F Jericha, E Kappeler, F Kadi, Y Karamanis, D Kelic, A Ketlerov, V Kitis, G Koehler, P Konovalov, V Kossionides, E Lacoste, V Leeb, H Lindote, A Lopes, I Lozano, M Lukic, S Markov, S Marrone, S Martinez-Val, J Mastinu, P Mengoni, A Milazzo, P Minguez, E Molina-Coballes, A Moreau, C Neves, F Oberhummer, H O'brien, S Papadopoulos, I Papavengelou, T Paradela, C Pavlik, A Pavlopoulos, P Perez-Parra, A Perlado, J Peskov, V Perrot, L Peskov, V Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Radici, M Raman, S Rapp, W Reifarth, R Rejmund, F Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Savvidis, E Stephan, C Tagliente, G Tain, J Tapia, C Tassan-Got, L Tavora, L Terlizzi, R Terrani, M Tsangas, N Vannini, G Vaz, P Ventura, A Villamarin-Fernandez, D Vincente-Vincente, M Vlachoudis, V Vlastou, R Voss, F Wendler, H Wiescher, M Wisshak, K Zanini, L AF Pancin, J Abbondanno, U Aerts, G Alvarez, H Andriamonje, S Angelopoulos, A Assimakopoulos, P Bacri, C Badurek, G Baumann, P Becvar, F Beer, H Benlliure, J Berthier, B Berthoumieux, E Boffi, S Borcea, C Boscolo-Marchi, E Bustreo, N Calvino, F Cano-ott, D Capote, R Carlson, P Cennini, P Chepel, V Chiaveri, E Colonna, N Cortes, G Cortina, D Couture, A Cox, J Dababneh, S Dahlfors, M David, S Delbart, A Derre, J Dolfini, R Domingo Pardo, C Duran-Escribano, I Eleftheriadis, C Embid-Segura, M Ferrant, L Ferrari, A Ferreira-Lourenco, L Ferreiramarques, R Frais-Koelbl, H Furman, W Giomataris, Y Goncalves, I Gonzalez-Romero, E Goverdovski, A Gramegna, F Griesmayer, E Gunsing, F Haight, R Heil, M Herrera-Martinez, A Ioannides, K Janeva, N Jeanneau, F Jericha, E Kappeler, F Kadi, Y Karamanis, D Kelic, A Ketlerov, V Kitis, G Koehler, P Konovalov, V Kossionides, E Lacoste, V Leeb, H Lindote, A Lopes, I Lozano, M Lukic, S Markov, S Marrone, S Martinez-Val, J Mastinu, P Mengoni, A Milazzo, P Minguez, E Molina-Coballes, A Moreau, C Neves, F Oberhummer, H O'brien, S Papadopoulos, I Papavengelou, T Paradela, C Pavlik, A Pavlopoulos, P Perez-Parra, A Perlado, J Peskov, V Perrot, L Peskov, V Plag, R Plompen, A Plukis, A Poch, A Policarpo, A Pretel, C Quesada, J Radici, M Raman, S Rapp, W Reifarth, R Rejmund, F Rosetti, M Rubbia, C Rudolf, G Rullhusen, P Salgado, J Savvidis, E Stephan, C Tagliente, G Tain, J Tapia, C Tassan-Got, L Tavora, L Terlizzi, R Terrani, M Tsangas, N Vannini, G Vaz, P Ventura, A Villamarin-Fernandez, D Vincente-Vincente, M Vlachoudis, V Vlastou, R Voss, F Wendler, H Wiescher, M Wisshak, K Zanini, L TI Measurement of the n(-)TOF beam profile with a micromegas detector SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE n(-)TOF; beam profile; neutron beam profiler; micromegas ID GASEOUS DETECTOR AB A Micromegas detector was used in the neutron Time-Of-Flight (n-TOF) facility at CERN to evaluate the spatial distribution of the neutron beam as a function of its kinetic energy. This was achieved over a large range of neutron energies by using two complementary processes: at low energy by capture of a neutron via the Li-6(n, alpha)t reaction, and at high energy by elastic scattering of neutrons on gas nuclei (argon + isobutane or helium + isobutane). Data are compared to Monte Carlo simulations and an analytic function fitting the beam profile has been calculated with a sufficient precision to use in neutron capture experiments at the n-TOF facility. (C) 2004 Elsevier B.V. All rights reserved. C1 CEA Saclay, DSM, DAPNIA, SphN, F-91191 Gif Sur Yvette, France. Inst Nazl Fis Nucl, Trieste, Italy. Univ Santiago de Compostela, Santiago De Compostela, Spain. Natl Tech Univ Athens, Dept Nucl Phys, Astroparticle Consortium, Athens, Greece. Democritus Univ Thrace, Dept Nucl Phys, Astroparticle Consortium, Thrace, Greece. ENEA, Bologna, Italy. IRMM, JRC, CEC, Geel, Belgium. Univ Basel, Dept Phys & Astron, Basel, Switzerland. Univ Vienna, Inst Isotopenforsch & Kernphys, Vienna, Austria. Univ Politecn Madrid, Madrid, Spain. NCSR Demokritos, Inst Nucl Phys, Astroparticle Consortium, GR-15310 Athens, Greece. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Inst Phys & Power Engn, Obninsk, Russia. Frank Lab Neutron Phys, Joint Inst Nucl Res, Dubna, Russia. Fachhsch Wiener Neustadt, Wiener Neustadt, Austria. Inst Tecnol & Nucl, Lisbon, Portugal. Univ Thessaloniki, Astroparticle Consortium, Nucl Phys Lab, GR-54006 Thessaloniki, Greece. Univ Valencia, Consejo Super Invest Cient, Valencia, Spain. Univ Notre Dame, Bari, Italy. Inst Nazl Fis Nucl, Bari, Italy. Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal. Univ Coimbra, Lab Instrumentacao & Phis Expt Particulas, P-3000 Coimbra, Portugal. Kungliga Tekn Hogskolan, Stockholm, Sweden. Univ Seville, Seville, Spain. Ctr Invest Energet Medioambientales & Technol, Madrid, Spain. Univ Politecn Cataluna, Barcelona, Spain. Lab Nazl Legnaro, I-35020 Legnaro, Italy. CERN, Geneva, Switzerland. Univ Pavia, I-27100 Pavia, Italy. Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany. Charles Univ Prague, CR-11636 Prague 1, Czech Republic. IN2P3, CNRS, Strasbourg, France. Vienna Univ Technol, Osterreich Univ, Atominst, A-1060 Vienna, Austria. IPN, IN2P3, CNRS, Orsay, France. Univ Ioannina, Nucl Phys Lab, Astroparticle Consortium, GR-45110 Ioannina, Greece. Univ Athens, Nucl Phys Lab, Astroparticle Consortium, Athens, Greece. RP Pancin, J (reprint author), CEA Saclay, DSM, DAPNIA, SphN, Orme Merisiers Bat 703-37C, F-91191 Gif Sur Yvette, France. EM jpancin@cea.fr RI Capote Noy, Roberto/M-1245-2014; Alvarez Pol, Hector/F-1930-2011; Cortina-Gil, Dolores/H-9626-2015; Paradela, Carlos/J-1492-2012; Gramegna, Fabiana/B-1377-2012; Calvino, Francisco/K-5743-2014; Benlliure, Jose/K-8407-2014; Dababneh, Saed/E-7281-2017; Mengoni, Alberto/I-1497-2012; Jericha, Erwin/A-4094-2011; Quesada Molina, Jose Manuel/K-5267-2014; Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014; Martinez-Val, Jose/D-3871-2013; Lindote, Alexandre/H-4437-2013; Neves, Francisco/H-4744-2013; Vaz, Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Tain, Jose L./K-2492-2014; Cano Ott, Daniel/K-4945-2014; OI Capote Noy, Roberto/0000-0002-1799-3438; Alvarez Pol, Hector/0000-0001-9643-6252; Cortina-Gil, Dolores/0000-0001-7672-9912; Gramegna, Fabiana/0000-0001-6112-0602; Calvino, Francisco/0000-0002-7198-4639; Benlliure, Jose/0000-0002-5114-1298; Dababneh, Saed/0000-0002-7376-1084; Mengoni, Alberto/0000-0002-2537-0038; Goncalves, Isabel/0000-0002-1997-955X; Pavlik, Andreas/0000-0001-7526-3372; Jericha, Erwin/0000-0002-8663-0526; Quesada Molina, Jose Manuel/0000-0002-2038-2814; Gonzalez Romero, Enrique/0000-0003-2376-8920; Martinez-Val, Jose/0000-0002-6325-6981; Lindote, Alexandre/0000-0002-7965-807X; Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359; Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508; Radici, Marco/0000-0002-4542-9797; Paradela Dobarro, Carlos/0000-0003-0175-8334; Chepel, Vitaly/0000-0003-0675-4586; Lozano Leyva, Manuel Luis/0000-0003-2853-4103; Koehler, Paul/0000-0002-6717-0771 NR 17 TC 39 Z9 39 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 102 EP 114 DI 10.1016/j.nima.2004.01.055 PG 13 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400010 ER PT J AU Ahrens, J Bai, X Bay, R Barwick, SW Becka, T Becker, JK Becker, KH Bernardini, E Bertrand, D Biron, A Boersma, DJ Boser, S Botner, O Bouchta, A Bouhali, O Burgess, T Carius, S Castermans, T Chirkin, D Collin, B Conrad, J Cooley, J Cowen, DF Davour, A De Clercq, C DeYoung, T Desitati, P Dewulf, JP Ekstrom, P Feser, T Gaug, M Gaisser, TK Ganugapati, R Geenen, H Gerhardt, L Gross, A Goldschmidt, A Hallgren, A Halzen, F Hanson, K Hardtke, R Harenberg, T Hauschildt, T Helbing, K Hellwig, M Herquet, P Hill, GC Hubert, D Hughey, B Hulth, PO Hultqvist, K Hundertmark, S Jacobsen, J Karle, A Kestel, M Kopke, L Kowalski, M Kuehn, K Lamoureux, JI Leich, H Leuthold, M Lindahl, P Liubarsky, I Madsen, J Marciniewski, P Matis, HS McParland, CP Messarius, T Minaeva, Y Miocinovic, P Mock, PC Morse, R Munich, KS Nam, J Nahnhauer, R Neunhoffer, T Niessen, P Nygren, DR Ogelman, H Olbrechts, P de los Heros, CP Pohl, AC Porrata, R Price, PB Przybylski, GT Rawlins, K Resconi, E Rhode, W Ribordy, M Richter, S Martino, JR Ross, D Sander, HG Schinarakis, K Schlenstedt, S Schmidt, T Schneider, D Schwarz, R Silvestri, A Solarz, M Spiczak, GM Spiering, C Stamatikos, M Steele, D Steffen, P Stokstad, RG Sulanke, KH Streicher, O Taboada, I Thollander, L Tilav, S Wagner, W Walck, C Wang, YR Wiebusch, CH Wiedemann, C Wischnewski, R Wissing, H Woschnagg, K Yodh, G AF Ahrens, J Bai, X Bay, R Barwick, SW Becka, T Becker, JK Becker, KH Bernardini, E Bertrand, D Biron, A Boersma, DJ Boser, S Botner, O Bouchta, A Bouhali, O Burgess, T Carius, S Castermans, T Chirkin, D Collin, B Conrad, J Cooley, J Cowen, DF Davour, A De Clercq, C DeYoung, T Desitati, P Dewulf, JP Ekstrom, P Feser, T Gaug, M Gaisser, TK Ganugapati, R Geenen, H Gerhardt, L Gross, A Goldschmidt, A Hallgren, A Halzen, F Hanson, K Hardtke, R Harenberg, T Hauschildt, T Helbing, K Hellwig, M Herquet, P Hill, GC Hubert, D Hughey, B Hulth, PO Hultqvist, K Hundertmark, S Jacobsen, J Karle, A Kestel, M Kopke, L Kowalski, M Kuehn, K Lamoureux, JI Leich, H Leuthold, M Lindahl, P Liubarsky, I Madsen, J Marciniewski, P Matis, HS McParland, CP Messarius, T Minaeva, Y Miocinovic, P Mock, PC Morse, R Munich, KS Nam, J Nahnhauer, R Neunhoffer, T Niessen, P Nygren, DR Ogelman, H Olbrechts, P de los Heros, CP Pohl, AC Porrata, R Price, PB Przybylski, GT Rawlins, K Resconi, E Rhode, W Ribordy, M Richter, S Martino, JR Ross, D Sander, HG Schinarakis, K Schlenstedt, S Schmidt, T Schneider, D Schwarz, R Silvestri, A Solarz, M Spiczak, GM Spiering, C Stamatikos, M Steele, D Steffen, P Stokstad, RG Sulanke, KH Streicher, O Taboada, I Thollander, L Tilav, S Wagner, W Walck, C Wang, YR Wiebusch, CH Wiedemann, C Wischnewski, R Wissing, H Woschnagg, K Yodh, G TI Muon track reconstruction and data selection techniques in AMANDA SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE AMANDA; track reconstruction; neutrino telescope; neutrino astrophysics ID HIGH-ENERGY NEUTRINOS; SOUTH-POLE; DEEP ICE; OPTICAL-PROPERTIES; ABSORPTION AB The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high-energy neutrino telescope operating at the geographic South Pole. It is a lattice of photo-multiplier tubes buried deep in the polar ice between 1500 and 2000 m. The primary goal of this detector is to discover astrophysical sources of high-energy neutrinos. A high-energy muon neutrino coming through the earth from the Northern Hemisphere can be identified by the secondary muon moving upward through the detector. The muon tracks are reconstructed with a maximum likelihood method. It models the arrival times and amplitudes of Cherenkov photons registered by the photo-multipliers. This paper describes the different methods of reconstruction, which have been successfully implemented within AMANDA. Strategies for optimizing the reconstruction performance and rejecting background are presented. For a typical analysis procedure the direction of tracks are reconstructed with about 2degrees accuracy. (C) 2004 Elsevier B.V. All rights reserved. C1 BU Wuppertal, Fachbereich Phys 8, D-42119 Wuppertal, Germany. Univ Uppsala, Div High Energy Phys, S-75121 Uppsala, Sweden. Free Univ Brussels, Fac Sci, Brussels, Belgium. DESY, D-15738 Zeuthen, Germany. Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. Univ Calif Berkeley, Bartol Res Inst, Berkeley, CA 94720 USA. Univ Mainz, Inst Phys, D-55099 Mainz, Germany. Univ Simon Bolivar, Dept Fis, Caracas 1080, Venezuela. Univ Wisconsin, Dept Phys, River Falls, WI 54022 USA. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Free Univ Brussels, Dienst ELEM, B-1050 Brussels, Belgium. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Univ Mons, B-7000 Mons, Belgium. Kalmar Univ, Dept Technol, S-39182 Kalmar, Sweden. Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden. RP Wiebusch, CH (reprint author), BU Wuppertal, Fachbereich Phys 8, Gaussstr 20, D-42119 Wuppertal, Germany. EM wiebusch@physik.uni-wuppertal.de RI Wiebusch, Christopher/G-6490-2012; Kowalski, Marek/G-5546-2012; Hundertmark, Stephan/A-6592-2010; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Tjus, Julia/G-8145-2012; GAug, Markus/L-2340-2014; Przybylski, Grzegorz/F-7474-2015; OI Wiebusch, Christopher/0000-0002-6418-3008; Hubert, Daan/0000-0002-4365-865X; GAug, Markus/0000-0001-8442-7877; Streicher, Ole/0000-0001-7751-1843; Perez de los Heros, Carlos/0000-0002-2084-5866 NR 58 TC 138 Z9 139 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 169 EP 194 DI 10.1016/j.nima.2004.01.065 PG 26 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400018 ER PT J AU Reifarth, R Haight, RC Heil, M Kappeler, F Vieira, DJ AF Reifarth, R Haight, RC Heil, M Kappeler, F Vieira, DJ TI Neutron capture measurements at a RIA-type facility SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE keV neutron capture; short-lived samples; radioactive beams; RIA ID CROSS-SECTION; NUCLEOSYNTHESIS; DETECTOR AB Neutron capture cross-sections of unstable isotopes are important for neutron-induced nucleosynthesis as well as for technological applications. The Rare Isotope Accelerator or comparable facilities will be able to produce radioactive ion beams up to 10(12) particles/s and would therefore be a suitable place for (n, gamma) studies on radioactive isotopes with half-lives between days and months. We propose a facility for measurements of (n, gamma) cross-sections of unstable isotopes in the keV range suited for minimal sample masses down to 10(15) atoms, corresponding to minimum half-lives of only 10 d. (C) 2004 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Forschungszentrum Karlsruhe, Inst Kernphys, D-76021 Karlsruhe, Germany. RP Reifarth, R (reprint author), Los Alamos Natl Lab, LANSCE-3,MS H855, Los Alamos, NM 87545 USA. EM reifarth@lanl.gov NR 17 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 215 EP 226 DI 10.1016/j.nima.2004.01.050 PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400021 ER PT J AU Morse, J Kenney, CJ Westbrook, EM Naday, I Parker, SI AF Morse, J Kenney, CJ Westbrook, EM Naday, I Parker, SI TI The spatial and energy response of a 3d architecture silicon detector measured with a synchrotron X-ray microbeam SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE detector; 3D; silicon; X-ray ID PIXEL DETECTOR; SENSORS; SYSTEM AB 3D processed silicon detectors offer several advantages over conventional, planar processed devices. The electric fields between the electrodes of a 3D detector are parallel to its surface, and for a given applied bias, stronger than those found in a planar device of equivalent dimensions. We have investigated the spatial response of a first generation 3D detector using a synchrotron X-ray microbeam as a probe. The microbeam was of cross-section similar to10 mum, commensurate with the dimensions of the electrode structures. The detector showed excellent charge collection, as verified by the energy spectra acquired at various probe positions. Variations in the energy spectra provided a sensitive indicator of the charge splitting that inevitably occurs at the boundaries between adjacent pixel cells, and for measuring the expected loss of sensitivity at the 3D electrodes themselves. (C) 2004 Elsevier B.V. All rights reserved. C1 Mol Biol Consortium, Chicago, IL USA. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Hawaii, Honolulu, HI 96822 USA. RP Morse, J (reprint author), European Synchrotron Radiat Facil, 6,Jules Horowitz,BP 220, F-38043 Grenoble, France. EM morse@esrf.fr NR 12 TC 11 Z9 11 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 236 EP 244 DI 10.1016/j.nima.2004.01.058 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400023 ER PT J AU Mestayer, MD Mikhailov, KR Stavinskiy, AV Vlassov, A AF Mestayer, MD Mikhailov, KR Stavinskiy, AV Vlassov, A TI Methods for studying close-track efficiency SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE close-track efficiency; track reconstruction; particle correlations ID DRIFT CHAMBER; CLAS; SPECTROMETER; CALORIMETER; PARTICLES; DETECTOR; SYSTEM AB Wire chambers used for particle tracking suffer a loss of efficiency when the trajectories of two particles from the same event are very close together in space. We describe two new methods for the study of this close-track efficiency. One is based on the study of a correlation function for particles with different masses as a function of their relative momenta in the laboratory reference system. The other method is based on the analysis of artificial events, constructed by merging raw data from separate events. Both methods and the standard Monte Carlo method were applied to data from the CLAS detector at Jefferson Laboratory. All three methods provide the same result for close-track efficiency with an accuracy sufficient for practical application. (C) 2004 Elsevier B.V. All rights reserved. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. ITEP, Moscow 117218, Russia. RP Vlassov, A (reprint author), Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM vlassov@jlab.org NR 18 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 306 EP 313 DI 10.1016/j.nima.2004.01.068 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400030 ER PT J AU Burr, TL Krick, M Mielke, A AF Burr, TL Krick, M Mielke, A TI Statistical evaluation of two triggering systems: an application of conditional variance SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE measurement variances; conditional variance; neutron coincidence counting; multi-band triggering system ID ASSAY AB Previous results related to measurement variances in neutron coincidence counting (NCC) indicate a disagreement between theory and experiment. In NCC, each detected neutron opens two coincidence gates and counts the number of neutrons that arrive within the allotted time period of the first neutron. Similarly, previous results for studying the alarm rate of a broadband radio-frequency collection system (to detect the radio-frequency emitted from nuclear explosions or lightning for example) are shown to lead to poor approximations for some parameter ranges. In a typical example of this type of system, the master trigger could alarm if five or more of eight sub-bands alarm within a specified time window beginning from an alarm from one or more sub-bands. We describe a simple but powerful statistical result involving conditional variance that corrects the previous results in both applications, and we demonstrate the adequacy of the results using real and simulated NCC data and simulated broadband radio-frequency data. (C) 2004 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Stat Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Safeguards Sci & Technol Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Space Data Syst, Los Alamos, NM 87545 USA. RP Burr, TL (reprint author), Los Alamos Natl Lab, Stat Grp, POB 1663, Los Alamos, NM 87545 USA. EM tburr@lanl.gov NR 13 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 314 EP 323 DI 10.1016/j.nima.2004.01.072 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400031 ER PT J AU Re, V Kirkby, D Bruinsma, M Berryhill, J Burke, S Callahan, D Campagnari, C Dahmes, B Hale, D Hart, P Kyre, S Levy, S Long, O Mazur, M Richman, J Stoner, J Verkerke, W Beringer, J Eisner, AM Grothe, M Lockman, WS Pulliam, T Seiden, A Walkowiak, W Wilson, M Borean, C Bozzi, C Piemontese, L Breon, AB Brown, D Charles, E Clark, AR Dardin, S Goozen, F Kerth, LT Gritsan, A Lynch, G Perazzo, A Roe, NA Zizka, G Lillard, V Roberts, D Brenna, E Citterio, M Lanni, F Palombo, F Ratti, L Manfredi, PF Mandelli, E Angelini, C Batignani, G Bettarini, S Bondioli, M Bosi, F Bucci, F Calderini, G Carpinelli, M Ceccanti, M Forti, F Gagliardi, D Giorgi, MA Lusiani, A Mammini, P Marchiori, G Morganti, M Morsani, F Neri, N Paoloni, E Profeti, A Rama, M Rizzo, G Sandrelli, F Simi, G Walsh, J Elmer, P Burchat, P Cheng, C Meyer, TI Petersen, BA Edwards, AJ Roat, C Bona, M Bianchi, F Gamba, D Trapani, P Bosisio, L Della Ricca, G Dittongo, S Lanceri, L Rashevskaia, I Vitale, L Vuagnin, G Datta, M Liu, R AF Re, V Kirkby, D Bruinsma, M Berryhill, J Burke, S Callahan, D Campagnari, C Dahmes, B Hale, D Hart, P Kyre, S Levy, S Long, O Mazur, M Richman, J Stoner, J Verkerke, W Beringer, J Eisner, AM Grothe, M Lockman, WS Pulliam, T Seiden, A Walkowiak, W Wilson, M Borean, C Bozzi, C Piemontese, L Breon, AB Brown, D Charles, E Clark, AR Dardin, S Goozen, F Kerth, LT Gritsan, A Lynch, G Perazzo, A Roe, NA Zizka, G Lillard, V Roberts, D Brenna, E Citterio, M Lanni, F Palombo, F Ratti, L Manfredi, PF Mandelli, E Angelini, C Batignani, G Bettarini, S Bondioli, M Bosi, F Bucci, F Calderini, G Carpinelli, M Ceccanti, M Forti, F Gagliardi, D Giorgi, MA Lusiani, A Mammini, P Marchiori, G Morganti, M Morsani, F Neri, N Paoloni, E Profeti, A Rama, M Rizzo, G Sandrelli, F Simi, G Walsh, J Elmer, P Burchat, P Cheng, C Meyer, TI Petersen, BA Edwards, AJ Roat, C Bona, M Bianchi, F Gamba, D Trapani, P Bosisio, L Della Ricca, G Dittongo, S Lanceri, L Rashevskaia, I Vitale, L Vuagnin, G Datta, M Liu, R TI Sensor performance of the BABAR Silicon Vertex Tracker after 4 years of data taking (vol 518, pg 286, 2004) SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Correction C1 Univ Pisa, Ist Nazl Fis Nucl, I-56010 Pisa, Italy. Univ Bergamo, Ist Nazl Fis Nucl, Pavia, Italy. Univ Calif Irvine, Irvine, CA USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Maryland, College Pk, MD 20742 USA. Univ Milan, Ist Nazl Fis Nucl, Milan, Italy. Univ Pavia, Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Princeton Univ, Princeton, NJ 08544 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA USA. Univ Turin, Ist Nazl Fis Nucl, Turin, Italy. Univ Trieste, Ist Nazl Fis Nucl, Trieste, Italy. Univ Wisconsin, Madison, WI USA. RP Simi, G (reprint author), Univ Pisa, Ist Nazl Fis Nucl, S Piero & Grado, I-56010 Pisa, Italy. EM simi@slac.stanford.edu RI Forti, Francesco/H-3035-2011; Ratti, Lodovico/I-8836-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; OI Forti, Francesco/0000-0001-6535-7965; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Re, Valerio/0000-0003-0697-3420 NR 1 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAY 21 PY 2004 VL 524 IS 1-3 BP 390 EP 391 DI 10.1016/j.nima.2004.01.054 PG 2 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 824IG UT WOS:000221679400040 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Teodorescu, L Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Layter, J Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Erwin, RJ Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Dubitzky, RS Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Biasini, M Pioppi, M Davier, M Grosdidier, G Hocker, A Laplace, S Diberder, FL Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Shorthouse, HW Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Taras, P Nicholson, H Raven, G Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Jessop, CP LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Cavoto, G Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Bellini, F Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Lodovico, FD Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Couderc, F Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Teodorescu, L Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Layter, J Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Spradlin, P Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Erwin, RJ Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Dubitzky, RS Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Biasini, M Pioppi, M Davier, M Grosdidier, G Hocker, A Laplace, S Diberder, FL Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Shorthouse, HW Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Taras, P Nicholson, H Raven, G Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Jessop, CP LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Ter-Antonyan, R Wong, QK Brau, J Frey, R Igonkina, O Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Cavoto, G Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Bellini, F Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Cristinziani, M Dong, D Dorfan, J Dujmic, D Dunwoodie, W Elsen, EE Field, RC Glanzman, T Gowdy, SJ Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Satpathy, A Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Lodovico, FD Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BaBar Collaboration TI Measurements of branching fractions and CP-violating asymmetries in B meson decays to charmless two-body states containing a K-0 SO PHYSICAL REVIEW LETTERS LA English DT Article ID QCD FACTORIZATION; PI-PI AB We present measurements of branching fractions and CP-violating asymmetries in decays of B mesons to two-body final states containing a K-0. The results are based on a data sample of approximately 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+-->K(0)pi(+))=(22.3+/-1.7+/-1.1)x10(-6), B(B-0-->K(0)pi(0))=(11.4+/-1.7+/-0.8)x10(-6), B(B+-->(K) over bar K-0(+))<2.5x10(-6), and B(B-0-->K-0(K) over bar (0))<1.8x10(-6), where the first uncertainty is statistical and the second is systematic, and the upper limits are at the 90% confidence level. In addition, the following CP-violating asymmetries have been measured: A(CP)(B+-->K(0)pi(+))=-0.05+/-0.08+/-0.01 and A(CP)(B-0-->K(0)pi(0))=0.03+/-0.36+/-0.11. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Heidelberg, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London, Queen Mary, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Della Ricca, Giuseppe/B-6826-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Saeed, Mohammad Alam/J-7455-2012; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Peters, Klaus/0000-0001-7133-0662; Saeed, Mohammad Alam/0000-0002-3529-9255; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; NR 27 TC 11 Z9 11 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 201802 DI 10.1103/PhysRevLett.92.201802 PG 7 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300011 ER PT J AU Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Teodorescu, L Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Biasini, M Pioppi, M Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Fry, JR Gabathuler, E Gamet, R Kay, M Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Shorthouse, HW Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Taras, P Nicholson, H Raven, G Wilden, L Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Jessop, CP LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Cavoto, G Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Bellini, F Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Teodorescu, L Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Eschrich, I Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Gary, JW Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Piatenko, T Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Dubitzky, RS Langenegger, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Biasini, M Pioppi, M Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Fry, JR Gabathuler, E Gamet, R Kay, M Payne, DJ Sloane, RJ Touramanis, C Back, JJ Cormack, CM Harrison, PF Shorthouse, HW Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, NR Barlow, RJ Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Taras, P Nicholson, H Raven, G Wilden, L Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Jessop, CP LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Cavoto, G Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Bellini, F Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Kelsey, MH Kim, P Kocian, ML Leith, DWGS Libby, J Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saeed, MA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BaBar Collaboration TI Measurement of the branching fractions and CP asymmetry of B- -> (D(CP)K-)-K-0 decays with the BaBar detector SO PHYSICAL REVIEW LETTERS LA English DT Article ID MESONS AB We present a study of B--->(DCPK-)-K-0 decays, where D-CP(0) is reconstructed in CP-even channels, based on a sample of 88.8x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. We measure the ratio of Cabibbo-suppressed to Cabibbo-favored branching fractions B(B--->(DCPK-)-K-0)/B(B--->D(CP)(0)pi(-))=[8.8+/-1.6(stat)+/-0.5(syst)]x10(-2) and the CP asymmetry A(CP)=0.07+/-0.17(stat)+/-0.06(syst). We also measure B(B--->(DK-)-K-0)/B(B--->D(0)pi(-))=[8.31+/-0.35(stat)+/-0.20(syst)]x10(-2) using a sample of 61.0x10(6) B (B) over bar pairs. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Heidelberg, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London, Queen Mary, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, Dipartimento Fis, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Scuola Normale Super Pisa, Dipartimento Fis, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Patrignani, Claudia/C-5223-2009; Peters, Klaus/C-2728-2008; de Sangro, Riccardo/J-2901-2012; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Patrignani, Claudia/0000-0002-5882-1747; Peters, Klaus/0000-0001-7133-0662; de Sangro, Riccardo/0000-0002-3808-5455; Bellini, Fabio/0000-0002-2936-660X; Sarti, Alessio/0000-0001-5419-7951; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 17 TC 10 Z9 10 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 202002 DI 10.1103/PhysRevLett.92.202002 PG 7 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300014 ER PT J AU Beloborodov, IS Lopatin, AV Vinokur, VM AF Beloborodov, IS Lopatin, AV Vinokur, VM TI Suppression of superconductivity in granular metals SO PHYSICAL REVIEW LETTERS LA English DT Article ID TWO-DIMENSIONAL SUPERCONDUCTORS; FILMS; TRANSITION; INSULATOR; TEMPERATURE; FIELD AB We investigate the suppression of the superconducting transition temperature due to Coulomb repulsion in granular metallic systems at large tunneling conductance between the grains, g(T)>>1. We find the correction to the superconducting transition temperature for 3D granular samples and films. We demonstrate that, depending on the parameters of superconducting grains, the corresponding granular samples can be divided into two groups: (i) the granular samples that belong to the first group may have only insulating or superconducting states at zero temperature depending on the bare intergranular tunneling conductance g(T), while (ii) the granular samples that belong to the second group in addition have an intermediate metallic phase where superconductivity is suppressed while the effects of the Coulomb blockade are not yet strong. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Beloborodov, IS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 21 TC 9 Z9 9 U1 1 U2 12 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 207002 DI 10.1103/PhysRevLett.92.207002 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300046 PM 15169375 ER PT J AU Berger, EL Sullivan, Z AF Berger, EL Sullivan, Z TI Lower limits on R-parity-violating couplings in supersymmetric models with light squarks SO PHYSICAL REVIEW LETTERS LA English DT Article ID PRODUCTION CROSS-SECTION; P(P)OVER-BAR COLLISIONS; ROOT-S; E(+)E(-) COLLISIONS; BOTTOM-QUARK; SCALAR TOP; ROOT-S=1.8 TEV; SEARCH; PARTICLES; DETECTOR AB We interpret the results of searches for strongly interacting massive particles to place absolute lower limits on R-parity-violating couplings for squarks with mass (m((q) over tilde)) below 100 GeV. Recent searches for anomalous isotopes require that there be a baryon-number-violating or lepton-number-violating coupling larger than 10(-22)-10(-21) if m((q) over tilde)>18 GeV. Using data from searches for stable particles at the CERN Large Electron Positron Collider (LEP) we demonstrate that this lower limit increases by 14 orders of magnitude, to an R-parity-violating coupling larger than 10(-8)-10(-7) for any squarks of mass less than 90 GeV. In the presence of an R-parity-violating coupling of this magnitude, neutralinos cannot explain the dark matter density in the Universe. C1 Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Berger, EL (reprint author), Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA. NR 37 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 201801 DI 10.1103/PhysRevLett.92.201801 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300010 PM 15169339 ER PT J AU Cowan, TE Fuchs, J Ruhl, H Kemp, A Audebert, P Roth, M Stephens, R Barton, I Blazevic, A Brambrink, E Cobble, J Fernandez, J Gauthier, JC Geissel, M Hegelich, M Kaae, J Karsch, S Le Sage, GP Letzring, S Manclossi, M Meyroneinc, S Newkirk, A Pepin, H Renard-LeGalloudec, N AF Cowan, TE Fuchs, J Ruhl, H Kemp, A Audebert, P Roth, M Stephens, R Barton, I Blazevic, A Brambrink, E Cobble, J Fernandez, J Gauthier, JC Geissel, M Hegelich, M Kaae, J Karsch, S Le Sage, GP Letzring, S Manclossi, M Meyroneinc, S Newkirk, A Pepin, H Renard-LeGalloudec, N TI Ultralow emittance, multi-MeV proton beams from a laser virtual-cathode plasma accelerator SO PHYSICAL REVIEW LETTERS LA English DT Article ID GENERATION; ELECTRONS; SOLIDS; IONS AB The laminarity of high-current multi-MeV proton beams produced by irradiating thin metallic foils with ultraintense lasers has been measured. For proton energies >10 MeV, the transverse and longitudinal emittance are, respectively, <0.004 mm mrad and <10(-4) eV s, i.e., at least 100-fold and may be as much as 10(4)-fold better than conventional accelerator beams. The fast acceleration being electrostatic from an initially cold surface, only collisions with the accelerating fast electrons appear to limit the beam laminarity. The ion beam source size is measured to be <15 mum (FWHM) for proton energies >10 MeV. C1 Gen Atom, San Diego, CA 92121 USA. Univ Paris 06, Lab Utilisat Lasers Intenses, UMR 7605, CNRS CEA, F-91128 Palaiseau, France. Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Max Planck Inst Quantum Opt, Garching, Germany. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Ecole Polytech, ENSTA, Lab Opt Appl, F-91761 Palaiseau, France. Ctr Protontherapie Orsay, F-91402 Orsay, France. Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP Gen Atom, San Diego, CA 92121 USA. RI Fernandez, Juan/H-3268-2011; Fuchs, Julien/D-3450-2016; Cowan, Thomas/A-8713-2011; OI Fernandez, Juan/0000-0002-1438-1815; Fuchs, Julien/0000-0001-9765-0787; Cowan, Thomas/0000-0002-5845-000X; Stephens, Richard/0000-0002-7034-6141 NR 22 TC 353 Z9 355 U1 2 U2 35 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 204801 DI 10.1103/PhysRevLett.92.204801 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300028 PM 15169357 ER PT J AU Creutz, M AF Creutz, M TI Spontaneous violation of CP symmetry in the strong interactions SO PHYSICAL REVIEW LETTERS LA English DT Article ID CHIRAL-SYMMETRY; QUARK MASSES; PARITY; QCD; LATTICE; RATIOS AB Some time ago Dashen [Phys. Rev. D 3, 1879 (1971)] pointed out that spontaneous CP violation can occur in the strong interactions. I show how a simple effective Lagrangian exposes the remarkably large domain of quark mass parameters for which this occurs. I close with some warnings for lattice simulations. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Creutz, M (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 16 TC 41 Z9 41 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 201601 DI 10.1103/PhysRevLett.92.201601 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300009 PM 15169338 ER PT J AU Gregori, G Glenzer, SH Knight, J Niemann, C Price, D Froula, DH Edwards, MJ Town, RPJ Brantov, A Rozmus, W Bychenkov, VY AF Gregori, G Glenzer, SH Knight, J Niemann, C Price, D Froula, DH Edwards, MJ Town, RPJ Brantov, A Rozmus, W Bychenkov, VY TI Effect of nonlocal transport on heat-wave propagation SO PHYSICAL REVIEW LETTERS LA English DT Article ID STEEP TEMPERATURE-GRADIENTS; LASER-PRODUCED PLASMAS; THOMSON SCATTERING; ELECTRON-TRANSPORT; DENSITY AB We present the first direct measurements of spatially and temporally resolved temperature and density profiles produced by nonlocal transport in a laser plasma. Absolutely calibrated measurements have been performed by Rayleigh scattering and by resolving the ion-acoustic wave spectra across the plasma volume with Thomson scattering. We find that the electron temperature and density profiles disagree with flux-limited models, but are consistent with nonlocal transport modeling. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada. Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia. RP Gregori, G (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. RI Brantov, Andrey/M-4098-2015; Bychenkov, Valery/M-3715-2015 OI Brantov, Andrey/0000-0001-5413-9612; Bychenkov, Valery/0000-0001-9624-3813 NR 30 TC 41 Z9 43 U1 0 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 205006 DI 10.1103/PhysRevLett.92.205006 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300035 PM 15169364 ER PT J AU Krafft, GA AF Krafft, GA TI Spectral distributions of Thomson-scattered photons from high-intensity pulsed lasers SO PHYSICAL REVIEW LETTERS LA English DT Article ID RADIATION AB General formulas for the far-field spectral distribution of photons Thomson scattered by a single electron have been obtained. Effects due to the pulsed nature of the laser beam are explicitly allowed, simultaneously with intensity high enough that harmonic generation is possible. For realistic pulsed photon beams, the spectrum of backscattered radiation is considerably broadened because of changes in the longitudinal velocity of the electrons during the pulse. Such ponderomotive broadening is especially pronounced at higher harmonics, eventually leading to a continuous emission spectrum. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Krafft, GA (reprint author), Thomas Jefferson Natl Accelerator Facil, 1200 Jefferson Ave, Newport News, VA 23606 USA. NR 12 TC 46 Z9 49 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 204802 DI 10.1103/PhysRevLett.92.204802 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300029 PM 15169358 ER PT J AU Rudati, J Chaloupka, JL Agostini, P Kulander, KC DiMauro, LF AF Rudati, J Chaloupka, JL Agostini, P Kulander, KC DiMauro, LF TI Multiphoton double ionization via field-independent resonant excitation SO PHYSICAL REVIEW LETTERS LA English DT Article ID THRESHOLD IONIZATION; LASER-PULSE; HELIUM AB The double ionization of xenon in the multiphoton regime has been studied at two wavelengths (0.77 and 0.79 mum) using an electron-ion coincidence technique and an intensity binned ion ratio method. Sharp resonant structures in the electron energy distribution correlated with the doubly charged ion, as well as a wavelength dependence of the Xe2+/Xe+ ratio provides new insights. A mechanism involving the shelving of population in Rydberg states followed by excitation of a core electron is proposed. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA. Ctr Etud Saclay, CEA, DSM, F-91191 Gif Sur Yvette, France. Lawrence Livermore Natl Lab, Div V, Livermore, CA 94551 USA. RP Rudati, J (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. NR 21 TC 26 Z9 26 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 203001 DI 10.1103/PhysRevLett.92.203001 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300017 PM 15169346 ER PT J AU Vaknin, D Zarestky, JL Rivera, JP Schmid, H AF Vaknin, D Zarestky, JL Rivera, JP Schmid, H TI Commensurate-incommensurate magnetic phase transition in magnetoelectric single crystal LiNiPO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOLITON LATTICE; LICOPO4 AB Neutron scattering studies of single crystal LiNiPO4 reveal a spontaneous first-order commensurate-incommensurate magnetic phase transition. Short- and long-range incommensurate phases are intermediate between the high temperature paramagnetic and the low temperature antiferromagnetic phases. The modulated structure has a predominant antiferromagnetic component, giving rise to satellite peaks in the vicinity of the fundamental antiferromagnetic Bragg reflection, and a ferromagnetic component, giving rise to peaks at small momentum transfers around the origin at (0,+/-Q,0). The wavelength of the modulated magnetic structure varies continuously with temperature. It is argued that the incommensurate short- and long-range phases are due to spin-dimensionality crossover from a continuous to the discrete Ising state. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Univ Geneva, Dept Inorgan Analyt & Appl Chem, CH-1211 Geneva, Switzerland. RP Vaknin, D (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Vaknin, David/B-3302-2009 OI Vaknin, David/0000-0002-0899-9248 NR 34 TC 42 Z9 42 U1 3 U2 18 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 21 PY 2004 VL 92 IS 20 AR 207201 DI 10.1103/PhysRevLett.92.207201 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LK UT WOS:000221541300047 PM 15169376 ER PT J AU Volegov, P Matlachov, A Mosher, J Espy, MA Kraus, RH AF Volegov, P Matlachov, A Mosher, J Espy, MA Kraus, RH TI Noise-free magnetoencephalography recordings of brain function SO PHYSICS IN MEDICINE AND BIOLOGY LA English DT Article ID OPTIMIZATION; PERFORMANCE AB Perhaps the greatest impediment to acquiring high-quality magnetoencephalography (MEG) recordings is the ubiquitous ambient magnetic field noise. We have designed and built a whole-head MEG system using a helmet-like superconducting imaging surface (SIS) surrounding the array of superconducting quantum interference device (SQUID) magnetometers used to measure the MEG signal. We previously demonstrated that the SIS passively shields the SQUID array from ambient magnetic field noise, independent of frequency, by 25-60 dB depending on sensor location. SQUID 'reference sensors' located on the outside of the SIS helmet measure ambient magnetic fields in very close proximity to the MEG magnetometers while being nearly perfectly shielded from all sources in the brain. The fact that the reference sensors measure no brain signal yet are located in close proximity to the MEG sensors enables very accurate estimation and subtraction of the ambient field noise contribution to the MEG sensors using an adaptive algorithm. We have demonstrated total ambient noise reduction factors in excess of 10(6) (> 120 dB). The residual noise for most MEG SQUID channels is at or near the intrinsic SQUID noise floor, typically 2-3 fT Hz(-1/2). We are recording MEG signals with greater signal-to-noise than equivalent EEG measurements. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Volegov, P (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 16 TC 16 Z9 16 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-9155 J9 PHYS MED BIOL JI Phys. Med. Biol. PD MAY 21 PY 2004 VL 49 IS 10 BP 2117 EP 2128 AR PII S0031-9155(04)73480-6 DI 10.1088/0031-9155/49/10/020 PG 12 WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Radiology, Nuclear Medicine & Medical Imaging GA 831KQ UT WOS:000222193700020 PM 15214546 ER PT J AU Ginosar, DM Thompson, DN Burch, KC AF Ginosar, DM Thompson, DN Burch, KC TI Recovery of alkylation activity in deactivated USY catalyst using supercritical fluids: a comparison of light hydrocarbons SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE alkylation; isoparaffin; trimethylpentane; solid acid catalyst; supercritical fluid; reactivation; regeneration ID SOLID ACID CATALYSTS; SULFATED ZIRCONIA CATALYSTS; 1-BUTENE/ISOBUTANE ALKYLATION; ISOBUTANE/BUTENE ALKYLATION; CARBON-DIOXIDE; CHEMISTRY; ZEOLITE; TRENDS; COKE AB Off-line, in-situ alkylation activity recovery from a completely deactivated solid acid catalyst was examined in a continuous-flow reaction system employing supercritical fluids (SCF). A USY zeolite catalyst was initially deactivated during the liquid phase alkylation of butene with isobutane in a single-pass reactor and then varying amounts of alkylation activity were recovered by passing supercritical fluids over the catalyst bed. A comparison of reactivation fluids on catalyst activity recovery is reported. Fluids examined included helium, propane, n-butane, isobutane, n-pentane, and isopentane. Phases studied included gas, liquid, and supercritical. As much as 82% of the fresh catalyst activity was recovered when employing supercritical isobutane. The ability of the fluid to facilitate a hydride reaction with the adsorbed deactivating high-molecular weight carbocations was indicated as an important property necessary to attain high levels of catalyst activity recovery. Activity recovery utilizing supercritical fluids that enhance reactivation by both reacting with and desorbing fouling compounds appears to be a promising technique to advance solid catalyst alkylation. (C) 2003 Elsevier B.V. All rights reserved. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Ginosar, DM (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA. EM dmg@inel.gov; thomdn@inel.gov; kam2@inel.gov RI Ginosar, Daniel/C-2357-2017 OI Ginosar, Daniel/0000-0002-8522-1659 NR 28 TC 22 Z9 28 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD MAY 20 PY 2004 VL 262 IS 2 BP 223 EP 231 DI 10.1016/j.apcata.2003.11.030 PG 9 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA 819KP UT WOS:000221314100012 ER PT J AU Glikman, E Gregg, MD Lacy, M Helfand, DJ Becker, RH White, RL AF Glikman, E Gregg, MD Lacy, M Helfand, DJ Becker, RH White, RL TI First-2MASS sources below the APM detection threshold: A population of highly reddened quasars SO ASTROPHYSICAL JOURNAL LA English DT Article DE dust, extinction; quasars : general; surveys ID NEAR-INFRARED SPECTRA; RED QUASARS; DUST EXTINCTION; STELLAR OBJECTS; ABSORPTION; GALAXY; QSOS; ULTRAVIOLET; REDSHIFT; 2MASS AB We have constructed a sample of bright near-infrared sources that are detected at radio wavelengths but undetected on the first-generation Palomar Observatory Sky Survey (POSSI) plates in order to search for a population of dust-obscured quasars. Optical and infrared spectroscopic follow-up of the sample has led to the discovery of 17 heavily reddened quasars (B - K > 6.5), 14 of which are reported here for the first time. This has allowed us to define a region in the R - K, J - K color plane in which 50% of the radio-selected objects are highly reddened quasars. We compare the surface density of this previously overlooked population to that of ultraviolet-excess radio-selected quasars, finding that they make up similar to 20% of the total quasar population for K less than or similar to 15.5. C1 Columbia Univ, Dept Astron, New York, NY 10027 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA. Spitzer Sci Ctr, Pasadena, CA 91125 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Glikman, E (reprint author), Columbia Univ, Dept Astron, 550 W 120th St, New York, NY 10027 USA. EM eilatg@astro.columbia.edu; gregg@igpp.ucllnl.org; mlacy@ipac.caltech.edu; djh@astro.columbia.edu; bob@igpp.ucllnl.org; rlw@stsci.edu NR 47 TC 61 Z9 62 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP 60 EP 75 DI 10.1086/383305 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FN UT WOS:000221523900006 ER PT J AU Andersson, KE Madejski, GM AF Andersson, KE Madejski, GM TI Complex structure of galaxy cluster A1689: Evidence for a merger from X-ray data? SO ASTROPHYSICAL JOURNAL LA English DT Article DE dark matter; galaxies : clusters : individual (A1689); X-rays : galaxies : clusters ID GRAVITATIONAL LENS MAGNIFICATION; ABELL 1689; LUMINOSITY FUNCTION; DARK-MATTER; MASS; CHANDRA; DISCREPANCY; DYNAMICS; PROFILE; MODELS AB A1689 is a galaxy cluster at z = 0.183 for which previous measurements of its mass by using various techniques gave discrepant results. We present a new detailed measurement of the mass with the data based on X-ray observations with the European Photon Imaging Camera aboard the XMM-Newton Observatory, determined by using an unparameterized deprojection technique. Fitting the total mass profile to a Navarro-Frenk-White model yields halo concentration c = 7.2(-2.4)(+1.6) and r(200) = 1.13 +/- 0.21 h(-1) Mpc, corresponding to a mass that is less than half of that found from gravitational lensing. Adding to the evidence of substructure from optical observations, X-ray analysis shows a highly asymmetric temperature profile and a nonuniform redshift distribution, implying large-scale relative motion of the gas. A lower than expected gas mass fraction f(gas) = 0.072 +/- 0: 008 (for a flat LambdaCDM cosmology) suggests a complex spatial and/or dynamical structure. We also find no sign of any additional absorbing component previously reported on the basis of the Chandra data, confirming the XMM-Newton low-energy response by using data from ROSAT. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. AlbaNova Univ Ctr, Royal Inst Technol, S-10691 Stockholm, Sweden. RP Andersson, KE (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 35 TC 73 Z9 73 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP 190 EP 201 DI 10.1086/383258 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FN UT WOS:000221523900015 ER PT J AU Gerardy, CL Hoflich, P Fesen, RA Marion, GH Nomoto, K Quimby, R Schaefer, BE Wang, LF Wheeler, JC AF Gerardy, CL Hoflich, P Fesen, RA Marion, GH Nomoto, K Quimby, R Schaefer, BE Wang, LF Wheeler, JC TI SN 2003du: Signatures of the circumstellar environment in a normal type Ia supernova? SO ASTROPHYSICAL JOURNAL LA English DT Article DE circumstellar matter; stars : evolution; supernovae : general ID X-RAY SOURCES; WHITE-DWARF MODELS; ACCELERATED LAMBDA ITERATION; HOBBY-EBERLY TELESCOPE; HIGH-VELOCITY EJECTA; LIGHT CURVES; SPECTROPHOTOMETRIC STANDARDS; EXPLOSION MODELS; INFRARED-SPECTRA; HUBBLE CONSTANT AB We present observations of the Type Ia supernova 2003du obtained with the Hobby-Eberly Telescope and report the detection of a high-velocity component in the Ca II infrared triplet near 8000 Angstrom, similar to features previously observed in SN 2000cx and SN 2001el. This feature exhibits a large expansion velocity (approximate to18,000 km s(-1)), which is nearly constant between -7 and +2 days relative to maximum light and disappears shortly thereafter. Other than this feature, the spectral evolution and light curve of SN 2003du resemble those of a normal SN Ia. We consider a possible origin for this high-velocity Ca II line in the context of a self-consistent spherical delayed-detonation model for the supernova. We find that the Ca II feature can be caused by a dense shell formed when circumstellar material of solar abundance is overrun by the rapidly expanding outermost layers of the SN ejecta. Model calculations show that the optical and infrared spectra are remarkably unaffected by the circumstellar interaction and the resulting shell. In particular, no hydrogen lines are detectable in either absorption or emission after the phase of dynamic interaction. The only qualitatively different features in the model spectra are the strong, high-velocity feature in the Ca II IR triplet around 8000 Angstrom and a somewhat weaker O I feature near 7,300 Angstrom. The Doppler shift and time evolution of these features provides an estimate for the amount of accumulated matter ( decreasing Doppler shift with increasing shell mass) and also an indication of the mixing within the dense shell. For high shell masses (approximate to5 x 10(-2) M.), the high-velocity component of the Ca II line merges with the photospheric line forming a broad feature. A cutoff of the blue wings of strong, unblended lines (particularly the Si II feature at about 6,000 Angstrom) may also be observable for larger shell masses. The model SN Ia light curves are little effected except at very early times when the shell is partially optically thick because of Thomson scattering, resulting in larger (B-V) colors by up to 0.3 mag. We apply these diagnostic tools to SN 2003du and infer that about 2 x 10(-2) M. of solar abundance material may have accumulated in a shell prior to the observations. Furthermore, in this interpretation, the early light-curve data imply that the circumstellar material was originally very close to the progenitor system, perhaps from an accretion disk, Roche lobe, or common envelope. Because of the observed confinement of Ca II in velocity space and the lack of ongoing interaction inferred from the light curve, the matter cannot be placed in the outer layers of the exploding white dwarf star or related to a recent period of high mass loss in the progenitor system prior to the explosion. We note that the signatures of circumstellar interaction could be rather common in Type Ia supernovae and may have eluded discovery because optical spectra often do not extend significantly beyond 7500 Angstrom. C1 Univ Texas, Dept Astron, Austin, TX 78712 USA. Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Nomoto, Ken'ichi/A-4393-2011 NR 85 TC 89 Z9 89 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP 391 EP 405 DI 10.1086/383488 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FN UT WOS:000221523900033 ER PT J AU Ho, WCG Lai, D AF Ho, WCG Lai, D TI Spectral features in the thermal emission from isolated neutron stars: Dependence on magnetic field strengths SO ASTROPHYSICAL JOURNAL LA English DT Article DE magnetic fields; stars : atmospheres; stars : magnetic fields; stars : neutron; X-rays : stars ID X-RAY-SPECTRUM; EQUATION-OF-STATE; VACUUM POLARIZATION; HYDROGEN ATMOSPHERES; CHANDRA OBSERVATIONS; CYCLOTRON-RESONANCE; XMM-NEWTON; RX-J0720.4-3125; OPACITIES; RADIATION AB We study several effects that influence the strength of the proton cyclotron and atomic features in the thermal spectra of magnetic neutron stars. We show that it is possible for vacuum polarization to strongly suppress the spectral lines when the magnetic field Bgreater than or similar to10(14) G. For weaker fields (B less than or similar to 7 x 10(13) G), the surface spectrum is unaffected by vacuum polarization; thus, the proton cyclotron absorption line can have a large equivalent width. Using an approximate calculation of the synthetic spectra, we show that variation of magnetic fields over the neutron star surface leads to broadening of the line. The recently detected absorption features from the isolated neutron stars RX J1308.6+2127, RX J1605.3+3249, and RX J0720.4-3125 can plausibly be explained by the proton cyclotron resonance, with possible blending due to atomic transitions, in the atmosphere of the star. C1 Cornell Univ, Dept Astron, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA. RP Ho, WCG (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Kavli Inst Particle Astrophys & Cosmol, POB 20450,Mail Stop 29, Stanford, CA 94309 USA. EM wynnho@astro.cornell.edu; dong@astro.cornell.edu NR 42 TC 43 Z9 44 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP 420 EP 425 DI 10.1086/383341 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FN UT WOS:000221523900036 ER PT J AU Kleinman, SJ Harris, HC Eisenstein, DJ Liebert, J Nitta, A Krzesinski, J Munn, JA Dahn, CC Hawley, SL Pier, JR Schmidt, G Silvestri, NM Smith, JA Szkody, P Strauss, MA Knapp, GR Collinge, MJ Mukadam, AS Koester, D Uomoto, A Schlegel, DJ Anderson, SF Brinkmann, J Lamb, DQ Schneider, DP York, DG AF Kleinman, SJ Harris, HC Eisenstein, DJ Liebert, J Nitta, A Krzesinski, J Munn, JA Dahn, CC Hawley, SL Pier, JR Schmidt, G Silvestri, NM Smith, JA Szkody, P Strauss, MA Knapp, GR Collinge, MJ Mukadam, AS Koester, D Uomoto, A Schlegel, DJ Anderson, SF Brinkmann, J Lamb, DQ Schneider, DP York, DG TI A catalog of spectroscopically identified white dwarf stars in the first data release of the Sloan Digital Sky Survey SO ASTROPHYSICAL JOURNAL LA English DT Article DE catalogs; subdwarfs; white dwarfs ID ROSAT ALL-SKY; QSO REDSHIFT SURVEY; MASS-DISTRIBUTION; STELLAR OBJECTS; HYDROGEN-RICH; COOL; HELIUM; SYSTEM; SAMPLE; BINARY AB We present the full spectroscopic white dwarf and hot subdwarf sample from the Sloan Digital Sky Survey (SDSS) first data release, DR1. We find 2551 white dwarf stars of various types, 240 hot subdwarf stars, and an additional 144 objects we have identified as uncertain white dwarf stars. Of the white dwarf stars, 1888 are nonmagnetic DA types and 171 are nonmagnetic DBs. The remaining ( 492) objects consist of all different types of white dwarf stars: DO, DQ, DC, DH, DZ, hybrid stars such as DAB, etc., and those with nondegenerate companions. We fit the DA and DB spectra with a grid of models to determine the T-eff and log g for each object. For all objects, we provide coordinates, proper motions, SDSS photometric magnitudes, and enough information to retrieve the spectrum/image from the SDSS public database. This catalog nearly doubles the known sample of spectroscopically identified white dwarf stars. In the DR1 imaged area of the sky, we increase the known sample of white dwarf stars by a factor of 8.5. We also comment on several particularly interesting objects in this sample. C1 New Mexico State Univ, Apache Point Observ, Sunspot, NM 88349 USA. USN Observ, Flagstaff, AZ 86002 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Cracow Pedag Univ, Mt Suhora Observ, PL-30084 Krakow, Poland. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Univ Texas, Dept Astron, Austin, TX 78712 USA. Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Carnegie Inst Washington Observ, Pasadena, CA 91101 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. RP Kleinman, SJ (reprint author), New Mexico State Univ, Apache Point Observ, POB 59, Sunspot, NM 88349 USA. EM sjnk@apo.nmsu.edu OI Smith, J. Allyn/0000-0002-6261-4601 NR 59 TC 182 Z9 182 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP 426 EP 444 DI 10.1086/383464 PN 1 PG 19 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FN UT WOS:000221523900037 ER PT J AU Drake, AJ Cook, KH Keller, SC AF Drake, AJ Cook, KH Keller, SC TI Resolving the nature of the Large Magellanic Cloud microlensing event MACHO-LMC-7 SO ASTROPHYSICAL JOURNAL LA English DT Article DE dark matter; Galaxy : halo; stars : low-mass, brown dwarfs ID MACHO PROJECT; PARALLAX; STARS; KINEMATICS; DISK AB We present the results from an analysis of Hubble Space Telescope high-resolution camera data for the Large Magellanic Cloud microlensing event MACHO-LMC-5. By determining the parallax and proper motion of this object, we find that the lens is an M dwarf star at a distance of 578(-53)(+65) pc with a proper motion of 21.39 +/- 0.04 mas yr(-1). On the basis of the kinematics and location of this star, it is more likely to be part of the Galactic thick disk than the thin disk population. We confirm that the microlensing event LMC-5 is a jerk-parallax event. C1 Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Pontificia Univ Catolica Chile, Dept Astron, Santiago 22, Chile. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia. RP Drake, AJ (reprint author), Princeton Univ, Dept Astrophys Sci, Peyton Hall,Ivy Lane, Princeton, NJ 08544 USA. NR 17 TC 25 Z9 25 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 20 PY 2004 VL 607 IS 1 BP L29 EP L32 DI 10.1086/421773 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 822FO UT WOS:000221524100008 ER PT J AU Lowrie, RB AF Lowrie, RB TI A comparison of implicit time integration methods for nonlinear relaxation and diffusion SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE Newton-Krylov method; nonlinear systems implicit differencing; radiation diffusion ID NEWTON-KRYLOV METHOD; NONEQUILIBRIUM RADIATION DIFFUSION; ALGORITHM; SYSTEMS; SOLVER AB Several time integration methods for nonlinear systems are compared. All of the lime discretizations are based on the theta-method, but differ in their treatment of the implicit nonlinear terms. One method converges the implicit nonlinear terms to a small tolerance and is often referred to as nonlinearly consistent (NC). Newton's method, or its approximation Newton-Krylov, is used to converge the nonlinearities. The other methods considered are linearized and comparisons are made for a relaxation problem and a radiation diffusion problem. The linearized one-step method that uses the full Jacobian is shown to have similar accuracy as NC methods. The laggged linearization method and an extension that is second-order accurate are also studied. A truncation error analysis complements the numerical results. For the relaxation problem, it is shown that each of the second-order accurate linearized methods may be more accurate than an NC method, depending on the degree of nonlinearity in the problem. For the radiation diffusion problem, in general the NC method is most accurate and allows a larger time step. However, the linearized methods perform surprisingly well. (C) 2003 Elsevier Inc. All rights reserved. C1 Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA. RP Lowrie, RB (reprint author), Los Alamos Natl Lab, Comp & Computat Sci Div, CCS-2,Mail Stop D413, Los Alamos, NM 87545 USA. EM lowrie@lanl.gov NR 18 TC 40 Z9 41 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 20 PY 2004 VL 196 IS 2 BP 566 EP 590 DI 10.1016/j.jcp.2003.11.016 PG 25 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 820PB UT WOS:000221400700007 ER PT J AU Vachal, P Garimella, RV Shashkov, MJ AF Vachal, P Garimella, RV Shashkov, MJ TI Untangling of 2D meshes in ALE simulations SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE mesh untangling; arbitrary Lagrangian-Eulerian (ALE) simulations; Rayleigh-Taylor simulation; element validity; triangles; quadrilaterals ID OPTIMIZATION; GENERATION; ALGORITHM AB A procedure is presented to untangle unstructured 2D meshes containing inverted elements by node repositioning. The inverted elements may result from node movement in Arbitrary Lagrangian-Eulerian (ALE) simulations of continuum mechanics problems with large shear deformation such as fluid flow and metal forming. Meshes with inverted elements may also be created due to the limitations of mesh generation algorithms particularly for non-simplicial mesh generation. The untangling procedure uses a combination of direct node placement based on geometric computation of the feasible set, and node repositioning driven by numerical optimization of an objective function that achieves its minimum on a valid mesh. It is shown that a combination of the feasible set, based method and the optimization method achieves the best results in untangling complex 2D meshes. Preliminary results are also presented for untangling of 3D unstructured meshes by the same approach. (C) 2003 Elsevier Inc. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Czech Tech Univ, Prague 11519 1, Czech Republic. RP Garimella, RV (reprint author), Los Alamos Natl Lab, MS B284,T7, Los Alamos, NM 87545 USA. EM vachal@galileo.fjfi.cvut.cz; rao@lanl.gov; shashkov@lanl.gov RI Vachal, Pavel/G-2131-2011; OI Vachal, Pavel/0000-0002-6668-9045 NR 21 TC 30 Z9 34 U1 0 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 20 PY 2004 VL 196 IS 2 BP 627 EP 644 DI 10.1016/j.jcp.2003.11.011 PG 18 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 820PB UT WOS:000221400700009 ER PT J AU Kao, J Flicker, D Henninger, R Frey, S Ghil, M Ide, K AF Kao, J Flicker, D Henninger, R Frey, S Ghil, M Ide, K TI Data assimilation with an extended Kalman filter for impact-produced shock-wave dynamics SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID PARAMETER-ESTIMATION; X-RAY; MODEL; OCEANOGRAPHY; METEOROLOGY; TOMOGRAPHY AB Model assimilation of data strives to determine optimally the state of an evolving physical system from a limited number of observations. The present study represents the first attempt of applying the extended Kalman filter (EKF) method of data assimilation to shock-wave dynamics induced by a high-speed impact. EKF solves the full nonlinear state evolution and estimates its associated error-covariance matrix in time. The state variables obtained by the blending of past model evolution with currently available data, along with their associated minimized errors (or uncertainties), are then used as initial conditions for further prediction until the next time at which data becomes available. In this study, a one-dimensional (1D) finite-difference code is used along with data measured from a 1D flyer plate experiment. An ensemble simulation suggests that the nonlinearity of the modeled system can be reasonably tracked by EKF. The results demonstrate that the EKF assimilation of a limited amount of pressure data, measured at the middle of the target plate alone, helps track the evolution of all the state variables. The fidelity of EKF is further investigated with numerically generated synthetic data front so-called "identical-twin experiments", in which the true state is known and various measurement techniques and strategies can be made easily simulated. We find that the EKF method can effectively assimilate the density fields.. which are distributed sparsely in time to mimic radiographic data, into the modeled system. (C) 2003 Elsevier Inc. All rights reserved. C1 Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. Univ Arizona, Tucson, AZ USA. Univ Calif Los Angeles, Los Angeles, CA USA. RP Los Alamos Natl Lab, Div Appl Phys, MS T086, Los Alamos, NM 87545 USA. EM Kao@lanl.gov RI Ide, Kayo/F-8443-2010 NR 33 TC 9 Z9 9 U1 1 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 20 PY 2004 VL 196 IS 2 BP 705 EP 723 DI 10.1016/j.jcp.2003.11.028 PG 19 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 820PB UT WOS:000221400700012 ER PT J AU Aharonson, O Zuber, MT Smith, DE Neumann, GA Feldman, WC Prettyman, TH AF Aharonson, O Zuber, MT Smith, DE Neumann, GA Feldman, WC Prettyman, TH TI Depth, distribution, and density of CO2 deposition on Mars SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article DE CO2; deposition; Mars ID GENERAL-CIRCULATION MODEL; ORBITER LASER ALTIMETER; SOUTH POLAR-CAP; WATER-ICE; SUMMER TEMPERATURES; VIKING OBSERVATIONS; MARTIAN ATMOSPHERE; GLOBAL SURVEYOR; CARBON-DIOXIDE; GRAVITY-FIELD AB Observations by the Mars Orbiter Laser Altimeter have been used to detect subtle changes of the polar surface height during the course of seasonal cycles that correlate with the expected pattern of CO2 deposition and sublimation. Using altimetric crossover residuals from the Mars Orbiter Laser Altimeter, we show that while zonally averaged data capture the global behavior of CO2 exchange, there is a dependence of the pattern on longitude. At the highest latitudes the surface height change is as high as 1.5-2 m peak to peak, and it decreases equatorward. Decomposition of the signal into harmonics in time allows inspection of the spatial pattern and shows that the annual component is strongly correlated with the residual south polar cap deposits and, to a lesser extent, with the north polar cap. In the north, the second harmonic (semiannual) component correlates with the location of the ice deposits. The phases of the annual cycles are in agreement with observations by the Thermal Emission Spectrometer of the timing of the annual disappearance of CO2 frost from the surface at the high latitudes. At lower latitudes, frost sublimation ("Crocus date'') predates the mean depositional minima, as expected. These global-scale, volumetric measurements of the distribution of condensed CO2 can be combined with measurements of the deposited column mass density derived from the Neutron Spectrometer on board Mars Odyssey to yield an estimate of the density of the seasonally exchanging material of 0.5 +/- 0.1 g/cm(3). These constraints should be considered in models of the Martian climate system and volatile cycles. C1 CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA. MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA. NASA, Goddard Space Flight Ctr, Terr Phys Lab, Greenbelt, MD 20771 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Aharonson, O (reprint author), CALTECH, Div Geol & Planetary Sci, MC 150-21, Pasadena, CA 91125 USA. EM oa@caltech.edu; zuber@mit.edu; dsmith@tharsis.gsfc.nasa.gov; neumann@tharsis.gsfc.nasa.gov; wfeldman@lanl.gov; thj@lanl.gov RI Neumann, Gregory/I-5591-2013; OI Neumann, Gregory/0000-0003-0644-9944; Prettyman, Thomas/0000-0003-0072-2831 NR 59 TC 34 Z9 35 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD MAY 20 PY 2004 VL 109 IS E5 AR E05004 DI 10.1029/2003JE002223 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 823LC UT WOS:000221612700001 ER PT J AU Zubavichus, Y Zharnikov, M Shaporenko, A Fuchs, O Weinhardt, L Heske, C Umbach, E Denlinger, JD Grunze, M AF Zubavichus, Y Zharnikov, M Shaporenko, A Fuchs, O Weinhardt, L Heske, C Umbach, E Denlinger, JD Grunze, M TI Soft X-ray induced decomposition of phenylalanine and tyrosine: A comparative study SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID ELECTRON-SPIN RESONANCE; SHELL EXCITATION SPECTROSCOPY; AMINO-ACIDS; RADIATION-DAMAGE; MASS-SPECTROMETRY; ORGANIC-MOLECULES; BIOLOGICAL MOLECULES; IONIZING-RADIATION; THIN-FILMS; SPECTRA AB The pristine state and soft X-ray induced decomposition of two aromatic amino acids, viz. phenylalanine and tyrosine, have been studied by means of XPS and NEXAFS. The spectroscopic data on radiation induced decomposition have been supplemented by a mass spectral analysis of the desorbed species. Despite very similar chemical structures, the two amino acids show a dramatically different behavior toward ionizing radiation: phenylalanine degrades very quickly whereas tyrosine shows a prominent stability against radiation damage. Reasons for this difference are discussed in relation to radical-mediated reactions responsible for the decomposition. C1 Univ Heidelberg, D-69120 Heidelberg, Germany. Russian Acad Sci, Inst Organoelement Cpds, Moscow 119991, Russia. Univ Wurzburg, D-97074 Wurzburg, Germany. Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. Adv Light Source, Berkeley, CA 94720 USA. RP Zubavichus, Y (reprint author), Univ Heidelberg, INF 253, D-69120 Heidelberg, Germany. EM yan.zubavichus@urz.uni-heidelberg.de RI Weinhardt, Lothar/G-1689-2013; Grunze, Michael/H-1600-2013 NR 50 TC 63 Z9 63 U1 0 U2 20 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD MAY 20 PY 2004 VL 108 IS 20 BP 4557 EP 4565 DI 10.1021/jp049376f PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 821IU UT WOS:000221454500026 ER PT J AU Matranga, C Bockrath, B AF Matranga, C Bockrath, B TI Permanent trapping of CO2 in single-walled carbon nanotubes synthesized by the HiPco process SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID KATAURA PLOT; ADSORPTION; SPECTROSCOPY; BUNDLES; RAMAN; INTENSITIES; OXIDATION; GASES AB Infrared spectroscopy is used to study trapped and physisorbed CO2 in single-walled carbon nanotube bundles (SWNTs) synthesized by the HiPco process. CO2 is entrapped within the SWNTs by acid oxidation of the unpurified sample followed by vacuum heating to 700 K. The trapped CO2 has a single v(3) mode at 2327 cm(-1), is stable during temperature cycling from 77 to 700 K, and remains after venting to room air. CO2 physisorption studies show a v(3) mode at 2330 cm(-1) for the as-received HiPco samples, 2340 cm(-1) for the acid-oxidized sample, and 2327 and 2340 cm(-1) for the oxidized sample after vacuum heating. The sites responsible for the infrared peaks of the physisorbed and trapped species are discussed. C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Matranga, C (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA. EM matranga@netl.doe.gov RI Matranga, Christopher/E-4741-2015 OI Matranga, Christopher/0000-0001-7082-5938 NR 29 TC 33 Z9 33 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD MAY 20 PY 2004 VL 108 IS 20 BP 6170 EP 6174 DI 10.1021/jp0498872 PG 5 WC Chemistry, Physical SC Chemistry GA 821IZ UT WOS:000221455000008 PM 18950097 ER PT J AU Parilla, PA Dillon, AC Parkinson, BA Jones, KM Alleman, J Riker, G Ginley, DS Heben, MJ AF Parilla, PA Dillon, AC Parkinson, BA Jones, KM Alleman, J Riker, G Ginley, DS Heben, MJ TI Formation of nanooctahedra in molybdenum disulfide and molybdenum diselenide using pulsed laser vaporization SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID FULLERENE-LIKE STRUCTURES; BORON-NITRIDE; ELECTRON-IRRADIATION; NANOTUBES; MOS2; NANOPARTICLES; LAYER AB Pulsed laser vaporization has been used to produce nanooctahedra of MoS2 and MoSe2. The nanooctahedra primarily form in two- or three-layer nested octahedra, although nesting up to five layers has been observed. Tilting the TEM sample stage and mapping how the images of single particles transformed provided the evidence to verify their octahedral geometry. Analysis of 30 two- and three-layered octahedra showed that their outer edge lengths clustered at similar to3.8 nm and similar to5.1 nm, respectively. This discreet sizing and the high symmetry of these closed nanooctahedra represent the closest inorganic analogy yet to the carbon fullerenes. The geometrical implications for forming octahedra from these layered compounds are investigated by considering different atomic arrangements assuming either trigonal prismatic or octahedral coordination around the Mo atom and yields two possible configurations for the actual structure of the nanooctahedra. A preliminary survey of pulsed laser vaporization of other layered metal chalcogenides shows that these dichalcogenides differ in their tendency to form small closed layered fullerene-like structures. These materials can be ranked from highest tendency to lowest as follows: NbSe2, WS2, WSe2, SnS2, TaS2, GaS, ReS2, and MoTe2. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA. RP Parilla, PA (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM philip_parilla@nrel.gov NR 28 TC 48 Z9 48 U1 2 U2 44 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD MAY 20 PY 2004 VL 108 IS 20 BP 6197 EP 6207 DI 10.1021/jp036202+ PG 11 WC Chemistry, Physical SC Chemistry GA 821IZ UT WOS:000221455000012 PM 18950101 ER PT J AU Roberts, RM Cleland, TJ Gray, PC Ambrosiano, JJ AF Roberts, RM Cleland, TJ Gray, PC Ambrosiano, JJ TI Hidden Markov model for competitive binding and chain elongation SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article AB Many chemical systems of interest consist of sets of reactions that contain iterated sequences that elongate a molecular chain. For example, such sets of reactions are commonly found in the transcription of DNA or the translation of RNA. However, there are competitive reactions that can prematurely terminate the chain-elongation process. A hidden Markov method appropriate for modeling chains of reactions with competitive processes (i.e., premature chain termination) is developed. The method is an extension of a hidden Markov model suggested by Gibson and Bruck (J. Phys. Chem. A 2000, 104, 1876). The equivalence between results using this method and results from simulation of a system employing the full set of reactions will be demonstrated (Gillespie, D. T. Markov Processes: An Introduction for Physical Scientists; Academic: San Diego, CA, 1992). Examples of its use are shown for several test problems. As an example of a practical application, a comparison among results for a model of terminal modification of ligand-aggregated receptors (Hlavacek, W.; Redondo, A.; Wofsy, C.; Goldstein, B. Bull. Math. Biol. 2002, 64, 887) simulated by ordinary differential equations, the full set of reactions, and the hidden Markov method are shown. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Roberts, RM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 6 TC 1 Z9 1 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD MAY 20 PY 2004 VL 108 IS 20 BP 6228 EP 6232 DI 10.1021/jp036941q PG 5 WC Chemistry, Physical SC Chemistry GA 821IZ UT WOS:000221455000016 PM 18950105 ER PT J AU Westerberg, S Wang, C Chou, K Somorjai, GA AF Westerberg, S Wang, C Chou, K Somorjai, GA TI High-pressure ammonia adsorption and dissociation on clean Fe(111) and oxygen-precovered Fe(111) studied by sum frequency generation vibrational spectroscopy SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID OPTICAL 2ND-HARMONIC GENERATION; CRYSTAL-SURFACES; IRON SURFACES; WORK FUNCTION; COADSORPTION; DESORPTION; INTERFACE; FE(100); CO AB The adsorption of gases N-2, H-2, O-2, and NH3 that play a role in ammonia synthesis have been studied on the Fe(111) crystal surface by Sum Frequency Generation (SFG) vibrational spectroscopy using an integrated ultrahigh vacuum/higla-pressure system. SFG spectra are presented for the dissociation intermediates, NH2 (similar to3325 cm(-1)) and NH (similar to3235 cm(-1)) under high pressure of ammonia (200 Torr) on the clean Fe(111) surface. Addition of 0.5 Torr of oxygen to 200 Torr of ammonia does not significantly change the bonding of dissociation intermediates to the surface. However, it leads to a phase change of nearly 180degrees between the resonant and nonresonant second-order nonlinear susceptibility of the surface, demonstrated as a reversal of the SFG spectral features. Heating the surface in the presence of 200 Torr of ammonia and 0.5 Torr of oxygen reduces the oxygen coverage, which can be seen from the SFG spectra as another relative phase change of 180degrees. The reduction of the oxide is also supported by Auger electron spectroscopy. The result suggests that the phase change of the spectral features could serve as a sensitive indicator of the chemical environment of the adsorbates. Clean Fe(111) is found to have a large SFG nonresonant signal. The magnitude of the nonresonant signal was dependent on the adsorption species; O-2 and N-2 decrease, while H-2 and NH3 increase the SFG nonresonant signal. The change in nonresonant signal is correlated to the change in work function for Fe(111) upon adsorption. Adsorption-induced changes in the SFG nonresonant signal was used as an indicator of surface conditions and to monitor surface reactions. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Royal Inst Technol, Lab Mat & Semicond Phys, SE-16440 Stockholm, Sweden. Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, D58 Hildebrand Hall, Berkeley, CA 94720 USA. EM somorjai@cchem.berkeley.edu RI Chou, Kuo-Chen/A-8340-2009 NR 24 TC 22 Z9 22 U1 1 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD MAY 20 PY 2004 VL 108 IS 20 BP 6374 EP 6380 DI 10.1021/jp037357k PG 7 WC Chemistry, Physical SC Chemistry GA 821IZ UT WOS:000221455000035 PM 18950124 ER PT J AU Olmsted, J Prakhov, S Manley, DM Allgower, CE Bekrenev, VS Briscoe, WJ Clajus, M Comfort, JR Craig, K Grosnick, D Isenhower, D Knecht, N Koetke, DD Kozlenko, NG Kruglov, S Kulbardis, AA Lolos, G Lopatin, IV Manweiler, R Marusic, A McDonald, S Nefkens, BMK Papandreou, Z Peaslee, DC Phaisangittisakul, N Price, JW Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Strakovsky, II Supek, I Tippens, WB AF Olmsted, J Prakhov, S Manley, DM Allgower, CE Bekrenev, VS Briscoe, WJ Clajus, M Comfort, JR Craig, K Grosnick, D Isenhower, D Knecht, N Koetke, DD Kozlenko, NG Kruglov, S Kulbardis, AA Lolos, G Lopatin, IV Manweiler, R Marusic, A McDonald, S Nefkens, BMK Papandreou, Z Peaslee, DC Phaisangittisakul, N Price, JW Ramirez, AF Sadler, M Shafi, A Spinka, H Stanislaus, TDS Starostin, A Staudenmaier, HM Strakovsky, II Supek, I Tippens, WB CA Crystal Ball Collaboration TI Does the Sigma(1580)(2)/(3-) resonance exist? SO PHYSICS LETTERS B LA English DT Article ID CROSS-SECTIONS AB Precise new data for the reaction K- p --> pi(0) Lambda are presented in the c.m. energy range 1565 to 1600 MeV. Our analysis of these data sheds new light on claims for the Sigma(1580)3/2(-) resonance, which (if it exists with the specified quantum numbers) must be an exotic baryon because of its very low mass. Our results show no evidence for this state. (C) 2004 Elsevier B.V. All rights reserved. C1 Kent State Univ, Kent, OH 44242 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Petersburg Nucl Phys Inst, Gatchina 188350, Russia. George Washington Univ, Washington, DC 20052 USA. Arizona State Univ, Tempe, AZ 85287 USA. Valparaiso Univ, Valparaiso, IN 46383 USA. Abilene Christian Univ, Abilene, TX 79699 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Univ Maryland, College Pk, MD 20742 USA. Univ Karlsruhe, D-76128 Karlsruhe, Germany. Rudjer Boskovic Inst, Zagreb 10002, Croatia. RP Kent State Univ, Kent, OH 44242 USA. EM manley@kent.edu OI Papandreou, Zisis/0000-0002-5592-8135 NR 14 TC 11 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD MAY 20 PY 2004 VL 588 IS 1-2 BP 29 EP 34 DI 10.1016/j.physletb.2004.02.070 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 821TI UT WOS:000221485200004 ER PT J AU Cohen, TD Gelman, BA Van Kolck, U AF Cohen, TD Gelman, BA Van Kolck, U TI An effective field theory for coupled-channel scattering SO PHYSICS LETTERS B LA English DT Article ID SHORT-RANGE INTERACTIONS; NUCLEON-ANTINUCLEON INTERACTION; CHIRAL LAGRANGIANS; NN SCATTERING; 3-BODY SYSTEM; DEUTERON SCATTERING; NNBAR ANNIHILATION; RENORMALIZATION; FORCES; EXPANSION AB The problem of describing low-energy two-body scattering for systems with two open channels with different thresholds is addressed in the context of an effective field theory. In particular, the problem where the threshold is unnaturally small and the cross section at low energy is unnaturally large is considered. It is shown that the lowest-order point coupling associated with the mixing of the channels scales as Lambda(-2) rather than Lambda(-1) (the scaling of the same-channel coupling and the scaling in a single-channel case) where Lambda is the ultraviolet cutoff. The renormalization of the theory at lowest order is given explicitly. The treatment of higher orders is straightforward. The potential implications for systems with deep open channels are discussed. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Cohen, TD (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA. EM cohen@physics.umd.edu; gelman@physics.arizona.edu; vankolck@physics.arizona.edu NR 60 TC 12 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAY 20 PY 2004 VL 588 IS 1-2 BP 57 EP 66 DI 10.1016/j.physletb.2004.03.020 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 821TI UT WOS:000221485200008 ER PT J AU Mehen, T Schat, C AF Mehen, T Schat, C TI Determining pentaquark quantum numbers from strong decays SO PHYSICS LETTERS B LA English DT Article ID CONSTITUENT QUARK-MODEL; RESONANCE; THETA(+); STATES AB Assuming that the recently observed Theta(+) and Xi(--) are members of an anti-decuplet of SU(3), decays to ground state baryons and mesons are calculated using an effective Lagrangian which incorporates chiral and SU(3) symmetry. We consider the possible quantum number assignments J(Pi) = 1/2(+/-), 3/2(+/-) and calculate ratios of partial widths. The branching ratios of exotic cascades can be used to discriminate between even and odd parity pentaquarks. (C) 2004 Published by Elsevier B.V. C1 Duke Univ, Dept Phys, Durham, NC 27708 USA. Jefferson Lab, Newport News, VA 23606 USA. RP Duke Univ, Dept Phys, Durham, NC 27708 USA. EM mehen@phy.duke.edu; schat@phy.duke.edu NR 50 TC 12 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD MAY 20 PY 2004 VL 588 IS 1-2 BP 67 EP 73 DI 10.1016/j.physletb.2004.03.039 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 821TI UT WOS:000221485200009 ER PT J AU Grossman, Y Isidori, G Murayama, H AF Grossman, Y Isidori, G Murayama, H TI Lepton-flavor mixing and K -> pi upsilon(upsilon)over-bar decays SO PHYSICS LETTERS B LA English DT Article ID STANDARD MODEL; CONSTRAINTS; PHYSICS; MATRIX; FCNC AB The impact of possible sources of lepton-flavor mixing on K --> pinu(ν) over bar decays is analysed. At the one-loop level lepton-flavor mixing originated from non-diagonal lepton mass matrices cannot generate a CP-conserving K-L --> pi(0)nu(ν) over bar amplitude. The rates of these modes are sensitive to leptonic flavor violation when there are at least two different leptonic mixing matrices. New interactions that violate both quark and lepton universalities could enhance the CP-conserving component of Gamma(K-L --> pi(0)nu(ν) over bar) and have a substantial impact. Explicit examples of these effects in the context of supersymmetric models, with and without R-parity conservation, are discussed. (C) 2004 Elsevier B.V All rights reserved. C1 Technion Israel Inst Technol, IL-32000 Haifa, Israel. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA. RP Isidori, G (reprint author), Technion Israel Inst Technol, IL-32000 Haifa, Israel. EM gino.isidori@lnf.infn.it RI Murayama, Hitoshi/A-4286-2011 NR 21 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAY 20 PY 2004 VL 588 IS 1-2 BP 74 EP 80 DI 10.1016/j.physletb.2004.01.093 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 821TI UT WOS:000221485200010 ER PT J AU Barnich, G Hurth, T Skenderis, K AF Barnich, G Hurth, T Skenderis, K TI Comments on the gauge fixed BRST cohomology and the quantum Noether method SO PHYSICS LETTERS B LA English DT Article ID YANG-MILLS THEORIES; CAUSAL CONSTRUCTION; RENORMALIZATION; QUANTIZATION AB We discuss in detail the relation between the gauge fixed and gauge invariant BRST cohomology. We showed previously that in certain gauges some cohomology classes of the gauge-fixed BRST differential do not correspond to gauge invariant observables. We now show that in addition "accidental" conserved currents may appear. These correspond one-to-one to observables that become trivial in this gauge. We explicitly show how the gauge-fixed BRST cohomology appears in the context of the quantum Noether method. (C) 2004 Elsevier B.V. All rights reserved. C1 Free Univ Brussels, B-1050 Brussels, Belgium. CERN, Div Theory, CH-1211 Geneva 23, Switzerland. Stanford Univ, SLAC, Stanford, CA 94309 USA. Univ Amsterdam, Inst Theoret Phys, NL-1018 XE Amsterdam, Netherlands. RP Barnich, G (reprint author), Free Univ Brussels, Campus Plaine CP 231, B-1050 Brussels, Belgium. EM gbamich@ulb.ae.be; tobias.hurth@cem.ch; skenderi@science.uva.nl OI Barnich, Glenn/0000-0002-2526-8594 NR 20 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAY 20 PY 2004 VL 588 IS 1-2 BP 111 EP 118 DI 10.1016/j.physletb.2004.03.035 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 821TI UT WOS:000221485200016 ER PT J AU Piao, H Adib, K Barteau, MA AF Piao, H Adib, K Barteau, MA TI A temperature-programmed X-ray photoelectron spectroscopy (TPXPS) study of chlorine adsorption and diffusion on Ag(111) SO SURFACE SCIENCE LA English DT Article DE X-ray photoelectron spectroscopy; diffusion and migration; chlorine; silver; chemisorption ID SURFACE STRUCTURAL CHEMISTRY; DESORPTION PROPERTIES; ETHYLENE EPOXIDATION; SILVER; OXYGEN; 1-CHLORO-2-METHYL-2-PROPANOL; CHLORIDATION; PROMOTERS; MODEL AB Synchrotron-based temperature programmed X-ray photoelectron spectroscopy (TPXPS) has been used to investigate the surface chloridation of Ag(1 1 1) to monolayer coverages. At 100 K both atomic and molecular chlorine species are present on the surface; adsorption at 300 K or annealing the adlayer at 100 K to this temperature generates adsorbed Cl atoms. As the surface is heated from 300 to 600 K, chlorine atoms diffuse below the surface, as demonstrated by attenuation of the Cl2p signals in TPXPS experiments. Quantitative analysis of the extent of attenuation is consistent with chlorine diffusion below the topmost silver layer. For coverages in the monolayer and sub-monolayer regime. chlorine diffusion to and from the bulk appears not to be significant, in contrast to previous results obtained at higher chlorine loadings. Chlorine is removed from the surface at 650-780 K by desorption as AgCl. These results demonstrate that chlorine diffusion beneath the surface does occur at coverages and temperatures relevant to olefin epoxidation processes carried out on silver catalysts with chlorine promoters. The surface sensitivity advantages of synchrotron-based XPS experiments were critical to observing Cl diffusion to the sub-surface at low coverages. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Delaware, Ctr Catalyt Sci & Technol, Dept Chem Engn, Newark, DE 19716 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Barteau, MA (reprint author), Univ Delaware, Ctr Catalyt Sci & Technol, Dept Chem Engn, 150 Acad St, Newark, DE 19716 USA. EM barteau@che.udel.edu RI Barteau, Mark/A-4728-2008 NR 18 TC 24 Z9 24 U1 2 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAY 20 PY 2004 VL 557 IS 1-3 BP 13 EP 20 DI 10.1016/j.susc.2004.03.063 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 822CI UT WOS:000221511700006 ER PT J AU Felton, JS Knize, MG Bennett, LM Malfatti, MA Colvin, ME Kulp, KS AF Felton, JS Knize, MG Bennett, LM Malfatti, MA Colvin, ME Kulp, KS TI Impact of environmental exposures on the mutagenicity/carcinogenicity of heterocyclic amines SO TOXICOLOGY LA English DT Article; Proceedings Paper CT 5th Congress of Toxicology in Developing Countries CY OCT 10-13, 2003 CL GUILIN, PEOPLES R CHINA SP Chinese Soc Toxicol, Int Union Toxicol DE mutagenicity; carcinogenicity; heterocyclic amines; PhIP ID DNA ADDUCT FORMATION; FRIED BEEF PATTIES; FEMALE F344 RATS; N-HYDROXY-PHIP; AROMATIC-AMINES; 2-AMINO-1-METHYL-6-PHENYLIMIDAZO<4,5-B>PYRIDINE PHIP; NONHUMAN-PRIMATES; PAN RESIDUES; GREEN TEA; INHIBITION AB Carcinogenic heterocyclic amines are produced from overcooked foods and are highly mutagenic in most short-term test Systems. One of the most abundant of these amines, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), induces breast, colon and prostate tumors in rats. Human dietary epidemiology studies suggest a strong correlation between either meat consumption or well-done muscle meat consumption and cancers of the colon, breast, stomach, lung and esophagus. For over 20 years our laboratory has helped define the human exposure to these dietary carcinogens. In this report we describe how various environmental exposures may modulate the risk from exposure to heterocyclic amines, especially PhIR To assess the impact of foods on PhIP metabolism in humans, we developed an LC/MS/MS method to analyze the four major PhIP urinary metabolites following the consumption of a single portion of grilled chicken. Adding broccoli to the volunteers' diet altered the kinetics of PhIP metabolism. At the cellular level we have found that PhIP itself stimulates a significant estrogenic response in MCF-7 cells, but even more interestingly, co-incubation of the cells with herbal teas appear to enhance the response. Numerous environmental chemicals found in food or the atmosphere can impact the exposure, metabolism, and cell proliferation response of heterocyclic amines. (C) 2004 Published by Elsevier Ireland Ltd. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. NCI, Ctr Canc Res, NIH, Bethesda, MD 20892 USA. RP Felton, JS (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, L-452, Livermore, CA 94551 USA. EM feltonl@llnl.gov FU NCI NIH HHS [CA55861, CA94709] NR 61 TC 36 Z9 37 U1 2 U2 7 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0300-483X J9 TOXICOLOGY JI Toxicology PD MAY 20 PY 2004 VL 198 IS 1-3 BP 135 EP 145 DI 10.1016/j.tox.2004.01.024 PG 11 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 823OH UT WOS:000221622000016 PM 15138037 ER PT J AU Bunick, CG Nelson, MR Mangahas, S Hunter, MJ Sheehan, JH Mizoue, LS Bunick, GJ Chazin, WJ AF Bunick, CG Nelson, MR Mangahas, S Hunter, MJ Sheehan, JH Mizoue, LS Bunick, GJ Chazin, WJ TI Designing sequence to control protein function in an EF-hand protein SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CALCIUM-BINDING PROTEINS; HYDROPHOBIC CORE SUBSTITUTIONS; CA2+-BINDING PROTEINS; CONFORMATIONAL CHANGE; CALBINDIN D-9K; T4 LYSOZYME; ALANINE SUBSTITUTIONS; DENSITY MODIFICATION; STRUCTURAL-CHANGES; CA2+ BINDING AB The extent of conformational change that calcium binding induces in EF-hand proteins is a key biochemical property specifying Ca2+ sensor versus signal modulator function. To understand how differences in amino acid sequence lead to differences in the response to Ca2+ binding, comparative analyses of sequence and structures, combined with model building, were used to develop hypotheses about which amino acid residues control Ca2+-induced conformational changes. These results were used to generate a first design of calbindomodulin (CBM-1), a calbindin D-9k re-engineered with 15 mutations to respond to Ca2+ binding with a conformational change similar to that of calmodulin. The gene for CBM-1 was synthesized, and the protein was expressed and purified. Remarkably, this protein did not exhibit any non-native-like molten globule properties despite the large number of mutations and the nonconservative nature of some of them. Ca2+-induced changes in CD intensity and in the binding of the hydrophobic probe, ANS, implied that CBM-1 does undergo Ca2+ sensorlike conformational changes. The X-ray crystal structure of Ca2+-CBM-1 determined at 1.44 Angstrom resolution reveals the anticipated increase in hydrophobic surface area relative to the wild-type protein. A nascent calmodulin-like hydrophobic docking surface was also found, though it is occluded by the inter-EF-hand loop. The results from this first calbindomodulin design are discussed in terms of progress toward understanding the relationships between amino acid sequence, protein structure, and protein function for EF-hand CaBPs, as well as the additional mutations for the next CBM design. C1 Vanderbilt Univ, Dept Biochem, Nashville, TN 37232 USA. Vanderbilt Univ, Ctr Struct Biol, Nashville, TN 37232 USA. Scripps Res Inst, Dept Biol Mol MB9, La Jolla, CA 92037 USA. Univ Tennessee, Dept Biochem Cellular & Mol Biol, Knoxville, TN 37996 USA. Univ Tennessee, Grad Sch Genome Sci & Technol, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. RP Chazin, WJ (reprint author), Vanderbilt Univ, Dept Biochem, 5140 BIOSCI-MRB 3, Nashville, TN 37232 USA. EM walter.chazin@vanderbilt.edu FU NIGMS NIH HHS [T32 GM 04120, R01 GM 29818, P01 GM 48495, R01 GM 40120, T32 GM008320, T32 GM 07347] NR 64 TC 22 Z9 22 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 19 PY 2004 VL 126 IS 19 BP 5990 EP 5998 DI 10.1021/ja0397456 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA 820VD UT WOS:000221416700030 PM 15137763 ER PT J AU Tokunaga, TK Olson, KR Wan, JM AF Tokunaga, TK Olson, KR Wan, JM TI Conditions necessary for capillary hysteresis in porous media: Tests of grain size and surface tension influences SO WATER RESOURCES RESEARCH LA English DT Article DE capillarity; gravel; hysteresis; moisture characteristics ID PHYSICAL-PROPERTIES; FLOW; SOIL; ADSORPTION; PORE AB [1] Hysteresis in the relation between water saturation and matric potential is generally regarded as a basic aspect of unsaturated porous media. However, the nature of an upper length scale limit for saturation hysteresis has not been previously addressed. Since hysteresis depends on whether or not capillary rise occurs at the grain scale, this criterion was used to predict required combinations of grain size, surface tension, fluid-fluid density differences, and acceleration in monodisperse systems. The Haines number ( Ha), composed of the aforementioned variables, is proposed as a dimensionless number useful for separating hysteretic ( Ha < 15) versus nonhysteretic ( Ha > 15) behavior. Vanishing of hysteresis was predicted to occur for grain sizes greater than 10.4 +/- 0.5 mm, for water-air systems under the acceleration of ordinary gravity, based on Miller-Miller scaling and Haines' original model for hysteresis. Disappearance of hysteresis was tested through measurements of drainage and wetting curves of sands and gravels and occurs between grain sizes of 10 and 14 mm ( standard conditions). The influence of surface tension was tested through measurements of moisture retention in 7 mm gravel, without and with a surfactant ( sodium dodecylbenzenesulfonate (SDBS)). The ordinary water system ( Ha = 7) exhibited hysteresis, while the SDBS system ( Ha = 18) did not. The experiments completed in this study indicate that hysteresis in moisture retention relations has an upper limit at Ha = 16 +/- 2 and show that hysteresis is not a fundamental feature of unsaturated porous media. C1 EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Tokunaga, TK (reprint author), EO Lawrence Berkeley Natl Lab, Div Earth Sci, MS 70-108B, Berkeley, CA 94720 USA. EM tktokunaga@lbl.gov RI Tokunaga, Tetsu/H-2790-2014; Wan, Jiamin/H-6656-2014 OI Tokunaga, Tetsu/0000-0003-0861-6128; NR 26 TC 8 Z9 8 U1 0 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY 19 PY 2004 VL 40 IS 5 AR W05111 DI 10.1029/2003WR002908 PG 13 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 823LU UT WOS:000221614700003 ER PT J AU Vigil, D Blumenthal, DK Brown, S Taylor, SS Trewhella, J AF Vigil, D Blumenthal, DK Brown, S Taylor, SS Trewhella, J TI Differential effects of substrate on type I and type IIPKA holoenzyme dissociation SO BIOCHEMISTRY LA English DT Article ID DEPENDENT PROTEIN-KINASE; SUBUNIT DIMERIC COMPLEX; AMIDE H/H-2 EXCHANGE; LIGHT-CHAIN KINASE; CATALYTIC SUBUNIT; REGULATORY SUBUNIT; CYCLIC-AMP; ALPHA SUBUNIT; CAMP BINDING; ADENOSINE 3' AB It has been widely accepted that cAMP activates the protein kinase A (PKA) holoenzyme by dissociating the regulatory and catalytic subunits, thus freeing the catalytic subunit to phosphorylate its targets. However, recent experiments suggest that cAMP does not fully dissociate the holoenzyme. Here, we investigate this mechanism further by using small-angle X-ray scattering to study, at physiological enzyme concentrations, the type Ialpha and type IIbeta holoenzyme structures under equilibrium solution conditions without any labeling of the protein subunits. We observe that while the addition of a molar excess of cAMP to the type Ialpha PKA holoenzyme causes partial dissociation, it is only upon addition of a PKA peptide substrate together with cAMP that full dissociation occurs. Similarly, addition of excess cAMP to the type IIbeta holoenzyme causes only a partial dissociation. However, while the addition of peptide substrate as well as excess cAMP causes somewhat more dissociation, a significant percentage of intact type IIbeta holoenzyme remains. These results confirm that both the type Ialpha and the type IIbeta holoenzymes are more stable in the presence of cAMP than previously thought. They also demonstrate that substrate plays a differential role in the activation of type I versus type II holoenzymes, which could explain some important functional differences between PKA isoforms. On the basis of these data and other recently published data, we propose a structural model of type I holoenzyme activation by cAMP. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92037 USA. Univ Calif San Diego, Howard Hughes Med Inst, La Jolla, CA 92037 USA. Univ Utah, Dept Pharmacol & Toxicol, Salt Lake City, UT 84112 USA. Univ Utah, Dept Biochem, Salt Lake City, UT 84112 USA. RP Trewhella, J (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA. EM jtrewhella@lanl.gov RI Brown, Simon/A-3261-2009; ID, BioCAT/D-2459-2012; OI Brown, Simon/0000-0003-3997-4614; Trewhella, Jill/0000-0002-8555-6766; Blumenthal, Donald/0000-0002-8614-1167 FU NCRR NIH HHS [RR-008630]; NIGMS NIH HHS [GM19301] NR 40 TC 38 Z9 40 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD MAY 18 PY 2004 VL 43 IS 19 BP 5629 EP 5636 DI 10.1021/bi0499157 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 820CZ UT WOS:000221365600007 PM 15134437 ER PT J AU Hemraj-Benny, T Banerjee, S Wong, SS AF Hemraj-Benny, T Banerjee, S Wong, SS TI Interactions of lanthanide complexes with oxidized single-walled carbon nanotubes SO CHEMISTRY OF MATERIALS LA English DT Article ID OPTICAL-PROPERTIES; ELECTRONIC-PROPERTIES; RAMAN-SPECTROSCOPY; CONTRAST AGENTS; CHARGE-TRANSFER; LUMINESCENCE; EUROPIUM; CATALYST; METALLOFULLERENES; FUNCTIONALIZATION AB Oxidized, cut single-walled carbon nanotubes (SWNTs) have been reacted with lanthanide salts containing Eu, La, and Tb. These studies are aimed at developing a fundamental understanding of the coordination chemistry of metal ions and of metal ion complexes onto the surfaces of nanotubes. It has been found that the lanthanide ions likely coordinate to these nanotubes through the increased number of oxygen atoms, forming predominantly ionic bonding arrangements. Metal coordination occurs through disruption of hydrogen bonding in bundles of oxidized SWNTs. The adducts were analyzed using FTIR, Raman, and photoluminescence spectroscopies and were structurally characterized using atomic force microscopy (AFM) and transmission electron microscopy (TEM), along with energy-dispersive X-ray spectroscopy (EDS). C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Mat & Chem Sci Dept, Upton, NY 11973 USA. RP Wong, SS (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. EM sswong@notes.ce.sunysb.edu NR 68 TC 21 Z9 21 U1 2 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAY 18 PY 2004 VL 16 IS 10 BP 1855 EP 1863 DI 10.1021/cm0349147 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 820KB UT WOS:000221386500008 ER PT J AU Brady, MP Wrobel, SK Lograsso, TA Payzant, EA Hoelzer, DT Horton, JA Walker, LR AF Brady, MP Wrobel, SK Lograsso, TA Payzant, EA Hoelzer, DT Horton, JA Walker, LR TI Synthesis of ternary nitrides from intermetallic precursors: Modes of nitridation in model Cr3Pt alloys to form Cr3PtN antiperovskite and application to other systems SO CHEMISTRY OF MATERIALS LA English DT Article ID INTERNAL OXIDATION; CHEMISTRY; GROWTH; EARTH AB The use of intermetallic alloy precursors is explored as a new means to synthesize complex transition and refractory metal nitrides, carbides, and related phases. The conditions under which model single-phase Cr3Pt and two-phase Cr3Pt-dispersed Cr alloys form Cr3PtN antiperovskite when thermally nitrided were studied. Phenomenological experiments suggest that the key variable to achieving single-phase Cr3PtN surface layers is the Cr3Pt phase composition. In two-phase beta-Cr-Cr3Pt alloys, the formation of single-phase Cr3PtN at Cr3Pt precipitates by in-place internal nitridation was found to be a strong function of the size of the Cr3Pt dispersion in the microstructure. Nanoscale Cr3Pt dispersions were readily converted to near single-phase Cr3PtN, whereas nitridation of coarse Cr3Pt particles resulted in a cellular or discontinuous-type reaction to form a lath mixture of Cr3PtN and a more Cr-rich Cr3Pt or beta-Cr. The potential for using such external/internal oxidation phenomena as a synthesis approach to layered or composite surfaces of ternary ceramic phases (nitrides, carbides, borides, etc.) of technological interest such as the Ti3AlC2 phase, bimetallic nitride, and carbide catalysts (Co3Mo3N and Co3Mo3C and related phases), and magnetic rare earth nitrides (Fe17Sm2Nx or Fe17Nd2Nx) is discussed. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Knoxville, TN 37996 USA. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RP Brady, MP (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM bradymp@ornl.gov RI Brady, Michael/A-8122-2008; Payzant, Edward/B-5449-2009; Hoelzer, David/L-1558-2016 OI Brady, Michael/0000-0003-1338-4747; Payzant, Edward/0000-0002-3447-2060; NR 21 TC 7 Z9 7 U1 1 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAY 18 PY 2004 VL 16 IS 10 BP 1984 EP 1990 DI 10.1021/cm034942p PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 820KB UT WOS:000221386500024 ER PT J AU Kim, JS Johnson, CS Vaughey, JT Thackeray, MM Hackney, SA AF Kim, JS Johnson, CS Vaughey, JT Thackeray, MM Hackney, SA TI Electrochemical and structural properties of xLi(2)M'O-3 center dot(1-x)LiMn0.5Ni0.5O2 eIectrodes for lithium batteries (M' = Ti, Mn, Zr; 0 <= x <= 0.3) SO CHEMISTRY OF MATERIALS LA English DT Article ID LINI0.5MN0.5O2 CATHODE MATERIAL; MANGANESE OXIDES; LOCAL-STRUCTURE; ION BATTERIES; RAY-ABSORPTION; ELECTRODES; LI2MNO3; DIFFRACTION; MECHANISM; CRYSTAL AB Electrochemical and structural properties of xLi(2)M'O-3.(1-x)LiMn0.5Ni0.5O2 electrodes (M' = Ti, Mn, Zr; 0 less than or equal to x less than or equal to 0.3) for lithium batteries are reported. Powder X-ray diffraction, lattice imaging by transmission electron microscopy, and nuclear magnetic resonance spectroscopy provide evidence that, for M' = Ti and Mn, the Li2M'O-3 component is structurally integrated into the LiMn0.5Ni0.5O2 component to yield "composite" structures with domains having short-range order, rather than true solid solutions in which the cations are uniformly distributed within discrete layers. Li2TiO3 and Li2ZrO3 components are electrochemically inactive, whereas electrochemical activity can be induced into the Li2MnO3 component above 4.3 V vs Li-0. When cycled in lithium cells, xLi(2)MnO(3).(1-x)LiMn0.5Ni0.5O2 electrodes with x = 0.3 provide capacities in excess of 300 mA.h/g over the range 4.6-1.45 V. C1 Argonne Natl Lab, Chem Engn Div, Electrochem Technol Program, Argonne, IL 60439 USA. Michigan Technol Univ, Dept Met & Mat Engn, Houghton, MI 49931 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. RP Thackeray, MM (reprint author), Argonne Natl Lab, Chem Engn Div, Electrochem Technol Program, 9700 S Cass Ave, Argonne, IL 60439 USA. EM thackeray@cmt.anl.gov RI Yoon, Won-Sub/H-2343-2011 NR 40 TC 317 Z9 341 U1 17 U2 198 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAY 18 PY 2004 VL 16 IS 10 BP 1996 EP 2006 DI 10.1021/cm0306461 PG 11 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 820KB UT WOS:000221386500026 ER PT J AU Xu, HW Nyman, M Nenoff, TM Navrotsky, A AF Xu, HW Nyman, M Nenoff, TM Navrotsky, A TI Prototype sandia octahedral molecular sieve (SOMS) Na2Nb2O6-H2O: Synthesis, structure and thermodynamic stability SO CHEMISTRY OF MATERIALS LA English DT Article ID DIFFRACTION; CALORIMETRY; REFINEMENT; ENERGETICS; SYSTEM; PHASES AB A new microporous phase Na2Nb2O6.H2O, which transforms to NaNbO3 perovskite on heating, has been synthesized by the hydrothermal method. Rietveld analysis of powder synchrotron X-ray diffraction data reveals that the structure comprises a framework of [NbO6] and [NaO6] pctahedra with other Na+ being located in the channels (space group C2/c; a = 17.0511(9) Angstrom; b = 5.0293(2) Angstrom; c = 16.4921(9) Angstrom; beta =113.942(2)degrees). This phase belongs to the recently synthesized Sandia octahedral molecular sieves (SOMS) family, Na2Nb2-xMxO6-x(OH)(x).H2O (M = Ti, Zr) and is the archetype for the substituted structures. Using drop-solution calorimetry into molten 3Na(2)O.4MoO(3) at 974 K, the enthalpies of formation of Na2Nb2O6.H2O from the constituent oxides and from the elements have been determined to be -295.4 +/- 4.8 and -2895.5 +/- 6.4 kJ/mol, respectively. From the drop-solution calorimetric data for Na2Nb2O6.H2O and its dehydrated perovskite phase, the enthalpy of the dehydration reaction, Na2Nb2O6.H2O --> 2NaNbO(3) + H2O, has been derived, and its implications for phase stability are discussed. C1 Univ Calif Davis, Thermochem Facil, Davis, CA 95616 USA. Univ Calif Davis, NEAT ORU, Davis, CA 95616 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Xu, HW (reprint author), Univ Calif Davis, Thermochem Facil, Davis, CA 95616 USA. EM hxu@ucdavis.edu NR 20 TC 35 Z9 36 U1 2 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD MAY 18 PY 2004 VL 16 IS 10 BP 2034 EP 2040 DI 10.1021/cm035066i PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 820KB UT WOS:000221386500031 ER PT J AU Lee, JY Balazs, AC Thompson, RB Hill, RM AF Lee, JY Balazs, AC Thompson, RB Hill, RM TI Self-assembly of amphiphilic nanoparticle-coil "tadpole" macromolecules SO MACROMOLECULES LA English DT Article ID DIBLOCK COPOLYMERS; MORPHOLOGY; PHASES; FILMS C1 Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Dow Corning Corp, Midland, MI 48686 USA. RP Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. RI Thompson, Russell/J-6326-2012 OI Thompson, Russell/0000-0002-6571-558X NR 23 TC 40 Z9 42 U1 3 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD MAY 18 PY 2004 VL 37 IS 10 BP 3536 EP 3539 DI 10.1021/ma035542q PG 4 WC Polymer Science SC Polymer Science GA 820MW UT WOS:000221394600006 ER PT J AU Heine, DR Grest, GS Lorenz, CD Tsige, M Stevens, MJ AF Heine, DR Grest, GS Lorenz, CD Tsige, M Stevens, MJ TI Atomistic simulations of end-linked poly(dimethylsiloxane) networks: Structure and relaxation SO MACROMOLECULES LA English DT Article ID DIFFUSION-CONTROLLED PROCESSES; ANGLE NEUTRON-SCATTERING; MONTE-CARLO SIMULATION; DENSE POLYMER SYSTEMS; RUBBER ELASTICITY; MOLECULAR-DYNAMICS; ENTANGLEMENT MODELS; EXPERIMENTAL TESTS; KINETICS; CHAIN AB The structure and elastic moduli of end-cross-linked poly(dimethylsiloxane) (PDMS) networks are studied using molecular dynamics (MD). The systems consist of 2000 PDMS chains of length 20 monomers and 1000 chains of length 40 monomers with varying amounts of cross-linker molecules. The networks are formed dynamically within the MD simulations. Starting from an equilibrated melt, tetrakis(dimethylsiloxy)silane cross-linkers are attached randomly to a fraction of the chain ends. When a free end comes within a short capture distance from an unsaturated cross-linker, a bond is formed between the chain and the cross-linker. The kinetics of the cross-linking process are studied as a function of the stoichiometry of the number of cross-linkers and are found to agree with earlier predictions. Stress relaxation simulations are performed on the fully formed networks by straining each system at four different rates and recording the tensile stress during the relaxation period. Results for the elastic moduli of the networks calculated from the plateau value of the tensile stress are compared to network models, and qualitative agreement with dynamic mechanical experiments is found. The chain conformations after straining indicate that these networks are deformed much more affinely than what is seen experimentally. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Heine, DR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM drheine@sandia.gov RI Lorenz, Christian/A-6996-2017 OI Lorenz, Christian/0000-0003-1028-4804 NR 52 TC 65 Z9 65 U1 2 U2 42 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD MAY 18 PY 2004 VL 37 IS 10 BP 3857 EP 3864 DI 10.1021/ma035760j PG 8 WC Polymer Science SC Polymer Science GA 820MW UT WOS:000221394600047 ER PT J AU Rice, G Tang, L Stedman, K Roberto, F Spuhler, J Gillitzer, E Johnson, JE Douglas, T Young, M AF Rice, G Tang, L Stedman, K Roberto, F Spuhler, J Gillitzer, E Johnson, JE Douglas, T Young, M TI The structure of a thermophilic archaeal virus shows a double-stranded DNA viral capsid type that spans all domains of life SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID HYPERTHERMOPHILIC ARCHAEA; BACTERIOPHAGE PRD1; CRENARCHAEON SULFOLOBUS; ELECTRON-MICROSCOPY; COMPLETE GENOME; ENVIRONMENTS; RECONSTRUCTION; ADENOVIRUS; EVOLUTION; SEQUENCE AB Of the three domains of life (Eukarya, Bacteria, and Archaea), the least understood is Archaea and its associated viruses. Many Archaea are extremophiles, with species that are capable of growth at some of the highest temperatures and extremes of pH of all known organisms. Phylogenetic rRNA-encoding DNA analysis places many of the hyperthermophilic Archaea (species with an optimum growth greater than or equal to80degreesC) at the base of the universal tree of life, suggesting that thermophiles were among the first forms of life on earth. Very few viruses have been identified from Archaea as compared to Bacteria and Eukarya. We report here the structure of a hyperthermophilic virus isolated from an archaeal host found in hot springs in Yellowstone National Park. The sequence of the circular double-stranded DNA viral genome shows that it shares little similarity to other known genes in viruses or other organisms. By comparing the tertiary and quaternary structures of the coat protein of this virus with those of a bacterial and an animal virus, we find conformational relationships among all three, suggesting that some viruses may have a common ancestor that precedes the division into three domains of life >3 billion years ago. C1 Montana State Univ, Thermal Biol Inst, Bozeman, MT 59717 USA. Montana State Univ, Dept Microbiol, Bozeman, MT 59717 USA. Montana State Univ, Dept Chem & Biochem, Bozeman, MT 59717 USA. Montana State Univ, Dept Plant Sci & Plant Pathol, Bozeman, MT 59717 USA. Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA. Portland State Univ, Dept Biol, Portland, OR 97207 USA. Idaho Natl Engn & Environm Lab, Dept Biotechnol, Idaho Falls, ID 83415 USA. RP Young, M (reprint author), Montana State Univ, Thermal Biol Inst, Bozeman, MT 59717 USA. EM myoung@montana.edu RI Douglas, Trevor/F-2748-2011 FU NIGMS NIH HHS [GM54076, R01 GM054076] NR 31 TC 151 Z9 156 U1 1 U2 18 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD MAY 18 PY 2004 VL 101 IS 20 BP 7716 EP 7720 DI 10.1073/pnas.0401773101 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 822GW UT WOS:000221528100042 PM 15123802 ER PT J AU Parker, JC Park, E AF Parker, JC Park, E TI Modeling field-scale dense nonaqueous phase liquid dissolution kinetics in heterogeneous aquifers SO WATER RESOURCES RESEARCH LA English DT Article DE dissolution; DNAPL; heterogeneity; kinetics; mass transfer ID STATE MASS-TRANSFER; SATURATED SUBSURFACE SYSTEMS; UNIFORM-FLOW FIELDS; POROUS-MEDIA; MULTIPHASE FLOW; TRANSFER RATES; GROUNDWATER; TETRACHLOROETHYLENE; CONTAMINANTS; TRANSPORT AB This study investigates field-scale DNAPL dissolution kinetics using high-resolution numerical simulations of DNAPL releases and dissolved phase transport. A percolation model is employed to simulate the distribution of TCE within 10 x 10 x 10 m source zones with spatially heterogeneous aquifer properties following a release event. Distributed aquifer properties and DNAPL saturations are utilized to simulate coupled groundwater flow and long-term dissolved phase transport. Grid-scale dissolution rates are computed based on published bench-scale relationships. Effective field-scale mass transfer coefficients are computed from simulated TCE fluxes at the downstream source zone boundary. Heterogeneity in groundwater velocity and DNAPL distributions leads to field-scale mass transfer coefficients that are much lower than laboratory-scale values. Field-scale mass transfer coefficients are observed to vary in direct proportion to the mean groundwater velocity, in contrast to laboratory studies that indicate proportionality with velocity to a power of similar to0.7. Computed field-scale mass transfer coefficients vary approximately in proportion to relative DNAPL mass raised to an empirical depletion exponent, which is <1 for laterally extensive DNAPL lenses and >1 for more randomly oriented residual DNAPL regions. The former DNAPL geometries exhibit slow reductions in source concentration and contaminant flux with time as mass depletion proceeds. The latter DNAPL geometries exhibit significant and steady declines in source concentration and contaminant flux with time as depletion occurs. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Parker, JC (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. EM parkerjc@ornl.gov NR 34 TC 97 Z9 98 U1 1 U2 17 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY 18 PY 2004 VL 40 IS 5 AR W05109 DI 10.1029/2003WR002807 PG 12 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 823LT UT WOS:000221614600001 ER PT J AU Kovarik, L Gouma, PI Kisielowski, C Court, SA Mills, MJ AF Kovarik, L Gouma, PI Kisielowski, C Court, SA Mills, MJ TI A HRTEM study of metastable phase formation in Al-Mg-Cu alloys during artificial aging SO ACTA MATERIALIA LA English DT Article DE Al-Mg-Cu alloys; age hardening; GPB zones; HRTEM; image reconstruction ID TRANSMISSION ELECTRON-MICROSCOPY; PRECIPITATION PROCESSES; ATOM-PROBE; RECONSTRUCTION; MORPHOLOGY; EVOLUTION; ALUMINUM; S' AB Microstructure evolution of an age hardenable Al-3Mg-0.4Cu-0.12Si (wt%) alloy has been studied during artificial aging at 180 degreesC prior to the formation of the stable S-phase. The primary investigation method used in this study was high-resolution transmission electron microscopy (HRTEM), coupled with image processing and image simulation. After 1 h of aging, the presence of super-lattice reflections was detected in the Fourier spectra of the HRTEM images, Suggesting an L1(0) type ordering of Mg and Cu atoms in the Al matrix. After 4 and 8 h of aging, coherent particles were observed in the microstructure. These particles give rise to diffraction spots that in previous literature have been considered to be characteristic of the S"-phase in the "Cu-lean" Al-Mg-Cu alloys. It is shown that these diffraction spots can be indexed in terms of a crystal structure that is closely related to the L1(0) ordering formed at the shorter aging times. The crystal structure is orthorhombic with lattice parameters a = 1.2 nm, b = 0.4 nm, c = 0.4 nm and space group Cmmm. We propose to identify these coherent particles Lis GPB-II zones, and the ordering that precedes them as GPB zones. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43201 USA. SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. Ernest Orlando Lawrence Berkeley natl Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. Alcan Technol & Management Ltd, CH-8212 Neuhausen, Switzerland. RP Kovarik, L (reprint author), Ohio State Univ, Dept Mat Sci & Engn, 2041 Coll Rd,Watts Hall 477, Columbus, OH 43201 USA. EM kovarik.8@osu.edu RI Kovarik, Libor/L-7139-2016 NR 27 TC 52 Z9 53 U1 1 U2 21 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY 17 PY 2004 VL 52 IS 9 BP 2509 EP 2520 DI 10.1016/j.actamat.2004.04.041 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 822RW UT WOS:000221558700002 ER PT J AU Kalinin, SV Bonnell, DA Alvarez, T Lei, XJ Hu, ZH Shao, R Ferris, JH AF Kalinin, SV Bonnell, DA Alvarez, T Lei, XJ Hu, ZH Shao, R Ferris, JH TI Ferroelectric lithography of multicomponent nanostructures SO ADVANCED MATERIALS LA English DT Article ID FORCE MICROSCOPE; DOMAIN-STRUCTURE; BARIUM-TITANATE; SURFACE; NANOPARTICLES AB A novel approach to fabricating multicomponent nanostructures is demonstrated. Atomic polarization in ferroelectric perovskites is manipulated to control electronic structure and local chemical reactivity (see Figure). Several paradigms for ferroelectric domain patterning are presented. Complex structures consisting of semiconductors, metals, and functional organic/biological molecules are produced. C1 Univ Penn, Sch Engn & Appl Sci, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN USA. RP Bonnell, DA (reprint author), Univ Penn, Sch Engn & Appl Sci, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA. EM bonnell@lrsm.upenn.edu RI Kalinin, Sergei/I-9096-2012 OI Kalinin, Sergei/0000-0001-5354-6152 NR 22 TC 90 Z9 90 U1 2 U2 25 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD MAY 17 PY 2004 VL 16 IS 9-10 BP 795 EP + DI 10.1002/adma.200305702 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 824SI UT WOS:000221706300006 ER PT J AU Gazda, DB Lipert, RJ Fritz, JS Porter, MD AF Gazda, DB Lipert, RJ Fritz, JS Porter, MD TI Investigation of the iodine-poly(vinylpyrrolidone) interaction employed in the determination of biocidal iodine by colorimetric solid-phase extraction SO ANALYTICA CHIMICA ACTA LA English DT Article DE colorimetry; solid-phase extraction; iodine; poly(vinylpyrrolidone); diffuse reflectance spectroscopy ID DIFFUSE REFLECTION SPECTROSCOPY; CHROMATICITY CHARACTERISTICS; RAPID-DETERMINATION; POVIDONE-IODINE; WATER; STABILITY; CHLORINE; SAMPLES; COMPLEX; NICKEL AB Colorimetric solid-phase extraction (C-SPE) has been previously explored as a means to monitor the iodine-based disinfectant used in the water systems on board the space shuttle. This same disinfectant is baselined for eventual deployment in the US water recovery system planned for node 3 of the International Space Station (ISS). With C-SPE, the I-2 concentration is determined from the diffuse reflectance spectrum (DRS) of the yellow iodine-poly(vinylpyrrolidone) (PVP) complex using the Kubelka-Munk function. However, the solution chemistry of iodine is very complex and results in a variety of inorganic species (e.g., I-, I-2, I-3(-), HOI) that have very different biocidal capabilities. Thus, the nature of the interaction of iodine with PVP, and more specifically, the identity of the iodine species involved in the interaction, requires more elucidation. This paper reports the findings from a series of detailed experiments conducted to elicit a more complete understanding of the iodine-PVP system employed in C-SPE. The results indicate that I-2, one of the two dominant biocidal forms of iodine, is the species responsible for the analytical signal in our C-SPE platform. These findings lay the ground work for the planned development of a multiplexed iodine determination and speciation platform for in-flight analysis of spacecraft water samples. (C) 2004 Elsevier B.V. All rights reserved. C1 US DOE, Ames Lab, Microanalyt Instrumentat Ctr, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Porter, MD (reprint author), US DOE, Ames Lab, Microanalyt Instrumentat Ctr, Ames, IA 50011 USA. EM mporter@porter1.ameslab.gov RI Lipert, Robert/A-8571-2009 NR 45 TC 30 Z9 30 U1 3 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD MAY 17 PY 2004 VL 510 IS 2 BP 241 EP 247 DI 10.1016/j.aca.2004.01.010 PG 7 WC Chemistry, Analytical SC Chemistry GA 812CR UT WOS:000220818100016 ER PT J AU Zhang, L Austin, D Merkulov, VI Meleshko, AV Klein, KL Guillorn, MA Lowndes, DH Simpson, ML AF Zhang, L Austin, D Merkulov, VI Meleshko, AV Klein, KL Guillorn, MA Lowndes, DH Simpson, ML TI Four-probe charge transport measurements on individual vertically aligned carbon nanofibers SO APPLIED PHYSICS LETTERS LA English DT Article ID GROWTH; NANOSTRUCTURES; FABRICATION; NANOTUBES; CATHODE; ARRAY AB We report four-probe I-V measurements on individual vertically aligned carbon nanofibers (VACNFs). These measurements were enabled by the fabrication of multiple Ti/Au ohmic contacts on individual fibers that exhibited resistance of only a few kilohms. These measurements demonstrate that VACNFs exhibit linear I-V behavior at room temperature, with a resistivity of approximately 4.2x10(-3) Omega cm. Our measurements are consistent with a dominant transport mechanism of electrons traveling through intergraphitic planes in the VACNFs. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, Oak Ridge, TN 37831 USA. Cornell Nanofabricat Facil, Ithaca, NY 14853 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA. RP Simpson, ML (reprint author), Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, POB 2008,MS 6006, Oak Ridge, TN 37831 USA. EM simpsonml1@ornl.gov RI Melechko, Anatoli/B-8820-2008; Simpson, Michael/A-8410-2011; OI Simpson, Michael/0000-0002-3933-3457; Baylor, Larry/0000-0002-0325-7771 NR 17 TC 65 Z9 67 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 3972 EP 3974 DI 10.1063/1.1748849 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800006 ER PT J AU Xu, GY Hiraka, H Shirane, G Ohwada, K AF Xu, GY Hiraka, H Shirane, G Ohwada, K TI Dual structures in (1-x)Pb(Zn1/3Nb2/3)O-3-xPbTiO(3) ferroelectric relaxors SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTALS; PHASE-TRANSITIONS; DIFFRACTION; BEHAVIOR AB We performed x-ray diffraction studies on a series of (1-x)Pb(Zn1/3Nb2/3)O-3-xPbTiO(3) single crystals with different incident photon energies, and therefore different penetration depths. Our results show that outer layers of similar to10-50 mum thick are present in all samples. The structure of those outer layers is different from that of the inside of the crystals, by having much greater (rhombohedral) distortions. With increasing x, rhombohedral-type lattice distortions develop, both in the outer layer and on the inside. (C) 2004 American Institute of Physics. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. JAERI, Synchrotron Radiat Res Ctr, Hyogo 6795148, Japan. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan. RP Xu, GY (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM gxu@bnl.gov RI Xu, Guangyong/A-8707-2010 OI Xu, Guangyong/0000-0003-1441-8275 NR 21 TC 64 Z9 65 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 3975 EP 3977 DI 10.1063/1.1751216 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800007 ER PT J AU Bostedt, C van Buuren, T Willey, TM Franco, N Terminello, LJ Heske, C Moller, T AF Bostedt, C van Buuren, T Willey, TM Franco, N Terminello, LJ Heske, C Moller, T TI Strong quantum-confinement effects in the conduction band of germanium nanocrystals SO APPLIED PHYSICS LETTERS LA English DT Article ID GE NANOCRYSTALS; EXCITONS; DOTS; LUMINESCENCE; DEFECTS; FILMS; SI AB Quantum-confinement effects in the conduction band of deposited germanium nanocrystals are measured to be greater than in similar-sized silicon nanocrystals. The germanium particles are condensed out of the gas phase and their electronic properties are determined with x-ray absorption spectroscopy. The conduction band edge shifts range from 0.2 eV for 2.7 nm particles up to 1.1 eV for 1.2 nm particles. (C) 2004 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Hamburg, Inst Expt Phys, Hamburg, Germany. Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. DESY, Hamburger Synchrotronstrahlungslab, D-2000 Hamburg, Germany. RP Bostedt, C (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM christoph.bostedt@desy.de RI Willey, Trevor/A-8778-2011 OI Willey, Trevor/0000-0002-9667-8830 NR 16 TC 98 Z9 98 U1 2 U2 32 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 4056 EP 4058 DI 10.1063/1.1751616 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800034 ER PT J AU Edmonds, KW Farley, NRS Campion, RP Foxon, CT Gallagher, BL Johal, TK van der Laan, G MacKenzie, M Chapman, JN Arenholz, E AF Edmonds, KW Farley, NRS Campion, RP Foxon, CT Gallagher, BL Johal, TK van der Laan, G MacKenzie, M Chapman, JN Arenholz, E TI Surface effects in Mn L-3,L-2 x-ray absorption spectra from (Ga,Mn)As SO APPLIED PHYSICS LETTERS LA English DT Article ID MAGNETIC CIRCULAR-DICHROISM; CURIE-TEMPERATURE; ARSENIC DIMERS; GAMNAS FILMS; GA1-XMNXAS; 2P; NI AB We have identified a Mn-rich layer on the surface on (Ga,Mn)As thin films which significantly influences soft x-ray absorption measurements. The Mn L-3,L-2 x-ray absorption spectra of the untreated films show a strong multiplet structure, consistent with earlier observations and characteristic of MnO. After removal of the surface layer, the multiplet structure is less pronounced and the spectrum is shifted to similar to0.5 eV lower photon energy. Comparison with calculated spectra imply a localized Mn ground state for the untreated sample and a hybridized ground state after etching. In addition, a large x-ray magnetic circular dichroism is observed at the Mn L-3,L-2 edge in the etched film. These results may explain several peculiarities of previously reported x-ray absorption studies from (Ga,Mn)As. (C) 2004 American Institute of Physics. C1 Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England. Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Edmonds, KW (reprint author), Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. EM kevin.edmonds@nottingham.ac.uk RI van der Laan, Gerrit/Q-1662-2015; Gallagher, Bryan/B-8116-2013; OI van der Laan, Gerrit/0000-0001-6852-2495; Gallagher, Bryan/0000-0001-8310-0899; Campion, Richard/0000-0001-8990-8987; Edmonds, Kevin/0000-0002-9793-4170 NR 27 TC 73 Z9 73 U1 0 U2 13 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 4065 EP 4067 DI 10.1063/1.1751619 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800037 ER PT J AU Cui, HT Yang, XJ Simpson, ML Lowndes, DH Varela, M AF Cui, HT Yang, XJ Simpson, ML Lowndes, DH Varela, M TI Initial growth of vertically aligned carbon nanofibers SO APPLIED PHYSICS LETTERS LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; CATALYTIC GROWTH; FILAMENTS AB Samples of vertically aligned carbon nanofibers (VACNFs) were viewed transverse to the growth direction and studied using both scanning and transmission electron microscopy. The VACNFs are composed of graphite layers nearly parallel to the substrate at their bottom end, gradually formed graphite "cups" in the main body, and a catalyst particle on the tip. The formation of such structure is due to the corresponding transformation of the shape of the catalyst particle during initial VACNF growth. A model for their initial growth is proposed. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Cui, HT (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM cui@ornl.gov RI Simpson, Michael/A-8410-2011; Varela, Maria/H-2648-2012; Varela, Maria/E-2472-2014 OI Simpson, Michael/0000-0002-3933-3457; Varela, Maria/0000-0002-6582-7004 NR 8 TC 57 Z9 57 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 4077 EP 4079 DI 10.1063/1.1751624 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800041 ER PT J AU Li, ZM Tang, ZK Siu, GG Bozovic, I AF Li, ZM Tang, ZK Siu, GG Bozovic, I TI Raman characterization of 0.4 nm single-wall carbon nanotubes using the full-symmetry line group SO APPLIED PHYSICS LETTERS LA English DT Article ID POLYMER-MOLECULES; IRREDUCIBLE REPRESENTATIONS; ZEOLITE CRYSTALS; CHANNELS; SPECTRA AB Raman spectra of single-wall carbon nanotubes produced in the channels of zeolite AFI single crystals have been analyzed in the light of the full symmetry group, the line group. The phonon dispersion curves of the tubes (5,0), (3,3), and (4,2) are calculated based on the lattice dynamical model and the phonon branches are assigned to their quantum numbers (irreducible representations). The structures of Raman spectra of different samples are reproduced well by the density of states of relevant Raman-active phonons. The result is useful to evaluate the contents of these tubes in real crystals where the contents are not well defined before. (C) 2004 American Institute of Physics. C1 Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China. City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Tang, ZK (reprint author), Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Kowloon, Hong Kong, Peoples R China. EM phzktang@ust.hk RI Tang, Zikang/G-8164-2011 NR 22 TC 26 Z9 28 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 4101 EP 4103 DI 10.1063/1.1753066 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800049 ER PT J AU Lee, HN Christen, HM Chisholm, MF Rouleau, CM Lowndes, DH AF Lee, HN Christen, HM Chisholm, MF Rouleau, CM Lowndes, DH TI Thermal stability of epitaxial SrRuO3 films as a function of oxygen pressure SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; FORMING GAS; OXIDES; SRTIO3; DEGRADATION; ELECTRODE; SILICON AB The thermal stability of electrically conducting SrRuO3 thin films grown by pulsed-laser deposition on (001) SrTiO3 substrates has been investigated by atomic force microscopy and reflection high-energy electron diffraction (RHEED) under reducing conditions (25-800 degreesC in 10(-7)-10(-2) Torr O-2). The as-grown SrRuO3 epitaxial films exhibit atomically flat surfaces with single unit-cell steps, even after exposure to air at room temperature. The films remain stable at temperatures as high as 720 degreesC in moderate oxygen ambients (>1 mTorr), but higher temperature anneals at lower pressures result in the formation of islands and pits due to the decomposition of SrRuO3. Using in situ RHEED, a temperature and oxygen pressure stability map was determined, consistent with a thermally activated decomposition process having an activation energy of 88 kJ/mol. The results can be used to determine the proper conditions for growth of additional epitaxial oxide layers on high quality electrically conducting SrRuO3. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Lee, HN (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. EM hnlee@ornl.gov RI Christen, Hans/H-6551-2013; Lee, Ho Nyung/K-2820-2012; Rouleau, Christopher/Q-2737-2015 OI Christen, Hans/0000-0001-8187-7469; Lee, Ho Nyung/0000-0002-2180-3975; Rouleau, Christopher/0000-0002-5488-3537 NR 17 TC 48 Z9 48 U1 3 U2 31 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 17 PY 2004 VL 84 IS 20 BP 4107 EP 4109 DI 10.1063/1.1753650 PG 3 WC Physics, Applied SC Physics GA 818UK UT WOS:000221269800051 ER PT J AU Bullock, RM AF Bullock, RM TI Catalytic ionic Hydrogenations SO CHEMISTRY-A EUROPEAN JOURNAL LA English DT Article DE homogeneous catalysis; hydride ligands; hydride transfer; hydrogenation; protonation ID TRANSITION-METAL HYDRIDES; LIGAND BIFUNCTIONAL CATALYSIS; CARBONYL-COMPOUNDS; DIHYDROGEN COMPLEXES; RUTHENIUM COMPLEXES; STRUCTURAL CHARACTERIZATION; HOMOGENEOUS HYDROGENATION; ASYMMETRIC HYDROGENATION; DONOR ABILITIES; LOW-TEMPERATURE AB Catalytic ionic hydrogenation of ketones occurs by proton transfer to a ketone from a cationic metal dihydride, followed by hydride transfer from a neutral metal hydride. This contrasts with traditional catalysts for ketone hydrogenation that require binding of the ketone to the metal and subsequent insertion of the ketone into a M-H bond. Ionic hydrogenation catalysts based on the inexpensive metals molybdenum and tungsten have been developed based on mechanistic understanding of the individual steps required in the catalytic reaction. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Bullock, RM (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM bullock@bnl.gov RI Bullock, R. Morris/L-6802-2016 OI Bullock, R. Morris/0000-0001-6306-4851 NR 63 TC 208 Z9 208 U1 2 U2 39 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0947-6539 J9 CHEM-EUR J JI Chem.-Eur. J. PD MAY 17 PY 2004 VL 10 IS 10 BP 2366 EP 2374 DI 10.1002/chem.200305639 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA 822XB UT WOS:000221572900001 PM 15146510 ER PT J AU Tang, RK Orme, CA Nancollas, GH AF Tang, RK Orme, CA Nancollas, GH TI Dissolution of crystallites: Surface energetic control and size effects SO CHEMPHYSCHEM LA English DT Article DE critical phenomena; dissolution; size effects; solubility; surface energies ID ATOMIC-FORCE MICROSCOPY; IN-SITU OBSERVATION; OCTACALCIUM PHOSPHATE; AQUEOUS-SOLUTIONS; CONSTANT UNDERSATURATION; KDP CRYSTALS; KINETICS; NUCLEATION; POTASSIUM; CALCITE AB Traditional understanding of dissolution assumes that the reaction is spontaneous and continues until equilibrium is reached, This paper presents theoretical and experimental data to support a dissolution mechanism that involves the existence of critical conditions for dissolution, in which the reaction is accompanied by the formation of pits and the subsequent displacement of pit steps. The accompanying increase in surface roughness leads to changes in surface energy with losses of crystal mass that are positive rather than negative and the existence of critical dissolution conditions. Critical pits and dissolution steps are verified experimentally and a relationship between the size and rate of displacement of steps is also demonstrated, in which the rate decreases with size and approaches zero at a critical size, r(*). These microscopic step dynamics are consistent with the observed size- effects in bulk dissolution, which cannot be explained using traditional dissolution theories. The observed size effects include self-inhibition, in which the dissolution rate decreases with extent of reaction, dissolution suppression, and periodic resumption. These interesting dissolution phenomena are only readily displayed when the sizes of dissolving crystallites fall in the some range as the critical size (i.e., within 50r(*)). It is interesting to note that natural biominerals and many nanoparticles fall into this category, so that their suspensions can be dynamically stabilized without dissolution in undersaturated supporting media. The current research implies that dissolution kinetics cannot be understood well without appealing to fundamental physical concepts about the energetic control of dissolution steps on a molecular level. A new dissolution model for crystallites is introduced systemically. C1 SUNY Buffalo, Dept Chem, Buffalo, NY 14260 USA. Lawrence Livermore Natl Lab, Dept Chem & Mat Sci, Livermore, CA 94550 USA. RP Nancollas, GH (reprint author), SUNY Buffalo, Dept Chem, Nat Sci Complex, Buffalo, NY 14260 USA. EM ghn@buffalo.edu RI Orme, Christine/A-4109-2009 FU NIDCR NIH HHS [DE03223] NR 62 TC 32 Z9 32 U1 2 U2 26 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1439-4235 J9 CHEMPHYSCHEM JI ChemPhysChem PD MAY 17 PY 2004 VL 5 IS 5 BP 688 EP 696 DI 10.1002/cphc.200300956 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 823QT UT WOS:000221628800010 PM 15179721 ER PT J AU Gourdon, O Bud'ko, SL Williams, D Miller, GJ AF Gourdon, O Bud'ko, SL Williams, D Miller, GJ TI Crystallographic, electronic, and magnetic studies of zeta(2)-GaM (M = Cr, Mn or Fe): Trends in itinerant magnetism SO INORGANIC CHEMISTRY LA English DT Article ID METALS AB This study of the crystal structure, electronic structure, and magnetic properties of the zeta(2)-GaM (M = Cr, Mn or Fe) alloys is motivated by the recent reinvestigation of the crystallographic Al8Cr5 structure type of zeta(2)-GaMn. The isostructural compounds zeta(2)-GaFe and zeta(2)-GaCr have been refined using X-ray powder diffraction as well as neutron powder diffraction for zeta(2)-GaFe. Their structures have been refined using the space group R (3) over barm, with cell parameters a = 12.625(8) Angstrom and c = 7.785(10) Angstrom for zeta(2)-GaCr and a = 12.4368(11) Angstrom and c = 7.7642(10) Angstrom for zeta(2)-GaFe. Band structure calculations using the self-consistent, spin-polarized TB-LMTO method were performed to understand their electronic structure and magnetic properties. Band calculations show that from GaCr to GaFe the magnetic interactions change from weakly antiferromagnetic coupling to ferromagnetic coupling. Magnetic measurements confirm ferromagnetism for GaFe and show a weak paramagnetic response for GaCr. C1 Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Ames Lab, US Dept Energy, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Phys, Ames, IA 50011 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Miller, GJ (reprint author), Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. EM gmiller@iastate.edu RI Lujan Center, LANL/G-4896-2012 NR 25 TC 13 Z9 13 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAY 17 PY 2004 VL 43 IS 10 BP 3210 EP 3218 DI 10.1021/ic035419f PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 819LX UT WOS:000221317500022 PM 15132628 ER PT J AU Luo, HM Dai, S Bonnesen, PV AF Luo, HM Dai, S Bonnesen, PV TI Solvent extraction of Sr2+ and Cs+ based on room-temperature ionic liquids containing monoaza-substituted crown ethers SO ANALYTICAL CHEMISTRY LA English DT Article ID ALKALI-METAL CATIONS; BIS(MONOAZACROWN ETHER)S; DERIVATIVES; TRANSPORT; COMPLEXATION; SALTS AB A series of N-alkyl aza-18-crown-6 ethers were synthesized and characterized by NMR spectroscopy and mass spectrometry. These monoaza-substituted crown ethers in ionic liquids were investigated as recyclable extractants for separation of Sr2+ and Cs+ from aqueous solutions. The pH-sensitive complexation capability of these ligands allows for a facile stripping process to be developed so that both macrocyclic ligands and ionic liquids can be reused. The extraction efficiencies and selectivities of these monoaza-substituted crown ethers for Na+, K+, Cs+, and Sr2+ were studied in comparison to those of dicyclohexano-18-crown-6 under the same conditions. The extraction selectivity order for dicyclohexano-18-crown-6 in the ionic liquids investigated here was K+ much greater than Sr2+ > Cs+ > Na+. The extraction selectivity order for N-alkyl aza-18-crown-6, in which the alkyl group is varied systematically from ethyl to n-dodecyl, was Sr2+ much greater than K+ > Cs+ > Na+ in 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide and 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide and K+ > Sr2+ > Cs+ > Na+ in 1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] amide and 1-octyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide. The strong dependence of selectivity on the type of ionic liquid indicates an important role played by solvation. in solvent extraction processes based on ionic liquids. The optimization of macrocyclic ligands and ionic liquids led to an extraction system that is highly selective toward Sr2+. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Luo, HM (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RI Bonnesen, Peter/A-1889-2016; Dai, Sheng/K-8411-2015 OI Bonnesen, Peter/0000-0002-1397-8281; Dai, Sheng/0000-0002-8046-3931 NR 24 TC 218 Z9 232 U1 2 U2 50 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAY 15 PY 2004 VL 76 IS 10 BP 2773 EP 2779 DI 10.1021/ac035473d PG 7 WC Chemistry, Analytical SC Chemistry GA 821LZ UT WOS:000221463500014 PM 15144187 ER PT J AU Groenewold, GS Avci, R Karahan, C Lefebre, K Fox, RV Cortez, MM Gianotto, AK Sunner, J Manner, WL AF Groenewold, GS Avci, R Karahan, C Lefebre, K Fox, RV Cortez, MM Gianotto, AK Sunner, J Manner, WL TI Characterization of interlayer Cs+ in clay samples using secondary ion mass spectrometry with laser sample modification SO ANALYTICAL CHEMISTRY LA English DT Article ID TOF-SIMS; CESIUM SORPTION; S-SIMS; SPECIATION; SOIL; SEDIMENT; ILLITE; CS-137; RADIOCESIUM; EXTRACTIONS AB Ultraviolet laser irradiation was used to greatly enhance the secondary ion mass spectrometry (SIMS) detection of Cs+ adsorbed to soil consisting of clay and quartz. Imaging SIMS showed that the enhancement of the Cs+ signal was spatially heterogeneous: the intensity of the Cs+ peak was increased by factors up to 100 for some particles but not at all for others. Analysis of standard clay samples exposed to Cs+ showed a variable response to laser irradiation depending on the type of clay analyzed. The Cs+ abundance was significantly enhanced when Cs+-exposed montmorillonite was irradiated and then analyzed using SIMS, which contrasted with the behavior of Cs+-exposed kaolinite, which displayed no Cs+ enhancement. Exposed illitic clays displayed modest enhancement of Cs+ upon laser irradiation, intermediate between that of kaolinite and montmorillonite. The results for Cs+ were rationalized in terms of adsorption to interlayer sites within the montmorillonite, which is an expandable phyllosilicate. In these locations, Cs+ was not initially detectable using SIMS. Upon irradiation, Cs+ was thermally redistributed, which enabled detection using SIMS. Since neither the illite nor the kaolinite is an expandable clay, adsorption to inner-layer sites does not occur, and either modest or no laser enhancement of the Cs+ signal is observed. Laser irradiation also produced unexpected enhancement of TV from illite and kaolinite clays that contained small quantities of Ti, which indicates the presence of microscopic titanium oxide phases in the clay materials. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Montana State Univ, Image & Chem Anal Lab, Bozeman, MT 59717 USA. Montana State Univ, Dept Chem, Bozeman, MT 59717 USA. Brigham Young Univ, Rexburg, ID 83460 USA. RP Groenewold, GS (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. EM gsg@inel.gov NR 56 TC 4 Z9 4 U1 0 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAY 15 PY 2004 VL 76 IS 10 BP 2893 EP 2901 DI 10.1021/ac035400u PG 9 WC Chemistry, Analytical SC Chemistry GA 821LZ UT WOS:000221463500029 PM 15144202 ER PT J AU Trelenberg, TW Dinh, LN Stuart, BC Balooch, M AF Trelenberg, TW Dinh, LN Stuart, BC Balooch, M TI Femtosecond pulsed laser ablation of metal alloy and semiconductor targets SO APPLIED SURFACE SCIENCE LA English DT Article DE GaAs; CoPt; inconel; fermosecond; ablation; laser; vapor pressure ID THIN-FILMS; DEPOSITION AB The properties of metal alloy (CoPt and inconel) and semiconductor (GaAs and InP) nanoclusters formed via femtosecond laser pulses were investigated. Ablation of the target materials was carried out both in vacuum (10(-4) Pa) and at set pressures in a number of background gases. The results of this work indicate that short laser pulses (low picoseconds/femtoseconds) alone are not enough to guarantee the production of films with stoichiometries matching those of the target materials. The production of stoichiometric alloy films depends on the similarity of the vapor pressures of the target constituents, while the production of stoichiometric compound films requires ablation in the presence of a background gas and compound constituents of comparable mass. (C) 2004 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Trelenberg, TW (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM trelenberg1@llrl.gov RI Stuart, Brent/K-4988-2015 NR 18 TC 19 Z9 22 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAY 15 PY 2004 VL 229 IS 1-4 BP 268 EP 274 DI 10.1016/j.apsusc.2004.02.002 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA 824IN UT WOS:000221680100036 ER PT J AU Annalora, A Bobrovnikova-Marjon, E Serda, R Lansing, L Chiu, ML Pastuszyn, A Iyer, S Marcus, CB Omdahl, JL AF Annalora, A Bobrovnikova-Marjon, E Serda, R Lansing, L Chiu, ML Pastuszyn, A Iyer, S Marcus, CB Omdahl, JL TI Rat cytochrome P450C24 (CYP24A1) and the role of F249 in substrate binding and catalytic activity SO ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS LA English DT Article ID MYELOID-LEUKEMIA CELLS; ESCHERICHIA-COLI; 25-HYDROXYVITAMIN D-3; 1-ALPHA,25-DIHYDROXYVITAMIN D-3; ADRENODOXIN REDUCTASE; KIDNEY MITOCHONDRIA; DIRECT EXPRESSION; CALCITROIC ACID; 24-HYDROXYLASE; CLONING AB A high level of functional recombinant rat cytochrome P450C24 enzyme (CYP24A1) was obtained (40-50mg/L) using an Escherichia coli expression system. Purified enzyme was stable with retention of spectral and catalytic activity. The rate of 1,25-dihydroxyvitamin D-3 [1,25(OH)(2)D-3] side-chain oxidation and cleavage to the end-product calcitroic acid was directly related to the rate of electron transfer from the ferredoxin redox partner. It was determined from substrate-induced spectral shifts that the 1alpha- and 25-hydroxyl groups on vitamin D-3 metabolites and analogs were the major determinants for high-affinity binding to CYP24A1. Lowest K-d values were obtained for 1alpha-vitamin D-3 (0.06 muM) and 1,25-dihydroxyvitamin D-3 (0.05 muM) whereas unmodified parental vitamin D-3 and the non-secosteroid 25-hydroxycholesterol had lower affinities with K-d values of 1.3 and 1.9 muM, respectively. The lowest binding affinity for natural vitamin D metabolites was observed for 24,25-dihydroxyvitamin D-3 [24,25(OH)(2)D-3] (0.43 muM). Kinetic analyses of the two natural substrates 25-hyroxyvitamin D-3 [25(OH)D-3] and 1,25-dihydroxyvitamin D-3 [1,25(OH)(2)D-3] revealed similar K-m values (0.35 and 0.38 muM, respectively), however, the turnover number was higher for 25(OH)D-3 compared to 1,25(OH)(2)D-3 (4.2 and 1 min(-1), respectively). Mutagenesis of F249 within the F-helix of CYP24A1 altered substrate binding and metabolism. Most notable, the hydrophobic to polar mutant F249T had a strong impact on lowering substrate-binding affinity and catalysis of the final C-23 oxidation sequence from 24,25,26,27-tetranor-1,23-dihydroxyvitamin D-3 to calcitroic acid. Two other hydrophobic 249 mutants (F249A and F249Y) also lowered substrate binding and expressed metabolic abnormalities that included the C-23-oxidation defect observed with mutant F249T plus a similar defect involving an earlier pathway action for the C-24 oxidation of 1,24,25-trihydroxyvitamin D-3. Therefore, Phe-249 within the F-helix was demonstrated to have an important role in properly binding and aligning substrate in the CYP24A1 active site for C-23 and C-24 oxidation reactions. (C) 2004 Elsevier Inc. All rights reserved. C1 Univ New Mexico, Sch Med, Dept Biochem & Mol Biol, Albuquerque, NM 87131 USA. Abbott Labs, Dept Struct Biol, Abbott Pk, IL 60064 USA. Univ New Mexico, Coll Pharm, Div Toxicol, Albuquerque, NM 87131 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87544 USA. RP Omdahl, JL (reprint author), Univ New Mexico, Sch Med, Dept Biochem & Mol Biol, Albuquerque, NM 87131 USA. EM jomdahl@salud.unm.edu OI Annalora, Andrew J./0000-0001-6415-8921; Chiu, Mark/0000-0001-6300-404X FU NIAMS NIH HHS [AR45455] NR 38 TC 20 Z9 20 U1 0 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0003-9861 J9 ARCH BIOCHEM BIOPHYS JI Arch. Biochem. Biophys. PD MAY 15 PY 2004 VL 425 IS 2 BP 133 EP 146 DI 10.1016/j.abb.2004.01.025 PG 14 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 818LU UT WOS:000221247400002 PM 15111121 ER PT J AU Sarret, G Balesdent, J Bouziri, L Garnier, JM Marcus, MA Geoffroy, N Panfili, F Manceau, A AF Sarret, G Balesdent, J Bouziri, L Garnier, JM Marcus, MA Geoffroy, N Panfili, F Manceau, A TI Zn speciation in the organic horizon of a contaminated soil by micro-x-ray fluorescence, micro- and powder-EXAFS spectroscopy, and isotopic dilution SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID HYPERACCUMULATOR ARABIDOPSIS-HALLERI; PRINCIPAL COMPONENT ANALYSIS; THLASPI-CAERULESCENS; QUANTITATIVE SPECIATION; HEAVY-METALS; MU-PIXE; ZINC; CADMIUM; FRANCE; CD AB Soils that have been acutely contaminated by heavy metals show distinct characteristics, such as colonization by metal-tolerant plant species and topsoil enrichment in weakly degraded plant debris, because biodegradation processes are strongly inhibited by contamination. Such an organic topsoil, located downwind of an active zinc smelter and extremely rich in Zn (similar to2%, dry weight), was investigated by X-ray diffraction, synchrotron-based X-ray microfluorescence, and powder- and micro-extended X-ray absorption fine structure (EXAFS) spectroscopy for Zn speciation and by isotopic dilution for Zn lability. EXAFS spectra recorded on size fractions and on selected spots of thin sections were analyzed by principal component analysis and linear combination fits. Although Zn primary minerals (franklinite, sphalerite, and willemite) are still present (similar to15% of total Zn) in the bulk soil, Zn was found to be predominantly speciated as Zn-organic matter complexes (similar to45%), outer-sphere complexes (similar to20%), Zn-sorbed phosphate (similar to10%), and Zn-sorbed iron oxyhydroxides (similar to10%). The bioaccumulated Zn fraction is likely complexed to soil organic matter after the plants' death. The proportion of labile Zn ranges from 54 to 92%, depending on the soil fraction, in agreement with the high proportion of organically bound Zn. Despite its marked lability, Zn seems to be retained in the topsoil thanks to the huge content of organic matter,which confers to this horizon a high sorption capacity. The speciation of Zn in this organic soil horizon is compared with that found in other types of soils. C1 Univ Grenoble, LGIT, Environm Geochem Grp, F-38041 Grenoble 9, France. CNRS, F-38041 Grenoble, France. Ctr Cadarache, CEA DEVM 163, UMR CNRS, Lab Ecol Microbioenne Rhizosphere, F-13108 St Paul Les Durance, France. Univ Aix Marseille 3, CEREGE, CNRS, F-13545 Aix En Provence, France. Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Sarret, G (reprint author), Univ Grenoble, LGIT, Environm Geochem Grp, F-38041 Grenoble 9, France. EM gsarret@ujf-grenoble.fr RI Beamline, FAME/G-9313-2012; Sarret, Geraldine/I-2797-2016 NR 39 TC 71 Z9 71 U1 4 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAY 15 PY 2004 VL 38 IS 10 BP 2792 EP 2801 DI 10.1021/es035171t PG 10 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 821ZS UT WOS:000221502800016 PM 15212252 ER PT J AU Catalano, JG Heald, SM Zachara, JM Brown, GE AF Catalano, JG Heald, SM Zachara, JM Brown, GE TI Spectroscopic and diffraction study of uranium speciation in contaminated vadose zone sediments from the Hanford site, Washington state SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID CRYSTAL-STRUCTURE DETERMINATION; MICROBIAL U(VI) REDUCTION; SODIUM BOLTWOODITE; SOILS; URANOPHANE; CA(UO2)2(SIO3OH)2.5H2O; REMEDIATION; CHEMISTRY; MINERALS; SHEET AB Contamination of vadose zone sediments under tank BX-102 at the Hanford site, Washington, resulted from the accidental release of 7-8 metric tons of uranium dissolved in caustic aqueous sludge in 1951. We have applied synchrotron-based X-ray spectroscopic and diffraction techniques to characterize the speciation of uranium in samples of these contaminated sediments. U L-III-edge X-ray absorption fine structure (XAFS) spectroscopic studies demonstrate that uranium occurs predominantly as a uranium(VI) silicate from the uranophane group of minerals. XAFS cannot distinguish between the members of this mineral group due to the near identical local coordination environments of uranium in these phases. However, these phases differ crystallographic ally, and can be distinguished using X-ray diffraction (XRD) methods. As the concentration of uranium was too low for conventional XRD to detect these phases, X-ray microdiffraction (muXRD) was used to collect diffraction patterns on similar to20mum diameter areas of localized high uranium concentration found using microscanning X-ray fluorescence (muSXRF). Only sodium boltwoodite, Na(UO2)(SiO3OH)(.)1.5H(2)O, was observed; no other uranophane group minerals were present. Sodium boltwoodite formation has effectively sequestered uranium in these sediments under the current geochemical and hydrologic conditions. Attempts to remediate the uranium contamination will likely face significant difficulties because of the speciation and distribution of uranium in the sediments. C1 Stanford Univ, Dept Geog & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. Argonne Natl Lab, PNC CAT, Adv Photon Soruce, Argonne, IL 60439 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Catalano, JG (reprint author), Stanford Univ, Dept Geog & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. EM catalano@pangea.stanford.edu RI Catalano, Jeffrey/A-8322-2013 OI Catalano, Jeffrey/0000-0001-9311-977X NR 51 TC 54 Z9 55 U1 4 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAY 15 PY 2004 VL 38 IS 10 BP 2822 EP 2828 DI 10.1021/es049963e PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 821ZS UT WOS:000221502800019 PM 15212255 ER PT J AU Bench, G Herckes, P AF Bench, G Herckes, P TI Measurement of contemporary and fossil carbon contents of PM2.5 aerosols: Results from Turtleback Dome, Yosemite National Park (vol 38, pg 2424, 2004) SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Correction C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA. RP Bench, G (reprint author), Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, L-397, Livermore, CA 94551 USA. RI Herckes, Pierre/E-6824-2011 OI Herckes, Pierre/0000-0002-0205-3187 NR 1 TC 0 Z9 0 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAY 15 PY 2004 VL 38 IS 10 BP 2960 EP 2960 DI 10.1021/es0403965 PG 1 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 821ZS UT WOS:000221502800039 ER PT J AU Wang, QF Liu, X O'Connell, J Peng, Z Krauss, RM Rainwater, DL VandeBerg, JL Rubin, EM Cheng, JF Pennacchio, LA AF Wang, QF Liu, X O'Connell, J Peng, Z Krauss, RM Rainwater, DL VandeBerg, JL Rubin, EM Cheng, JF Pennacchio, LA TI Haplotypes in the APOA1-C3-A4-A5 gene cluster affect plasma lipids in both humans and baboons SO HUMAN MOLECULAR GENETICS LA English DT Article ID C-III GENE; SEQUENCE VARIATION; PROXIMAL PROMOTER; TRAIT LOCI; AV GENE; HYPERTRIGLYCERIDEMIA; TRIGLYCERIDES; REGION; ASSOCIATION; MICE AB Genetic studies in non-human primates serve as a potential strategy for identifying genomic intervals where polymorphisms impact upon human disease-related phenotypes. It remains unclear, however, whether independently arising polymorphisms in orthologous regions of non-human primates leads to similar variation in a quantitative trait found in both species. To explore this paradigm, we studied a baboon apolipoprotein gene cluster (APOA1/C3/A4/A5) for which the human gene orthologs have well-established roles in influencing plasma HDL-cholesterol and triglyceride concentrations. Our extensive polymorphism analysis of this 68 kb gene cluster in 96 pedigreed baboons identified several haplotype blocks each with limited diversity, consistent with haplotype findings in humans. To determine whether baboons, like humans, also have particular haplotypes associated with lipid phenotypes, we genotyped 634 well-characterized baboons using 16 haplotype tagging SNPs. Genetic analysis of single SNPs, as well as haplotypes, revealed an association of APOA5 and APOC3 variants with HDL-cholesterol and triglyceride concentrations, respectively. Thus, independent variation in orthologous genomic intervals does associate with similar quantitative lipid traits in both species, supporting the possibility of uncovering human quantitative trait loci genes in a highly controlled non-human primate model. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Sci, Berkeley, CA 94720 USA. Johns Hopkins Univ, Bloomberg Sch Publ Hlth, Dept Epidemiol, Baltimore, MD USA. Univ Maryland, Sch Med, Div Endocrinol Diabet & Nutr, Baltimore, MD 21201 USA. Childrens Hosp Oakland, Res Inst, Oakland, CA 94609 USA. SW Fdn Biomed Res, Dept Genet, San Antonio, TX USA. SW Fdn Biomed Res, SW Natl Primate Res Ctr, San Antonio, TX USA. USA, Dept Energy, Energy Joint Genome Inst, Walnut Creek, CA USA. RP Pennacchio, LA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genome Sci, MS 84-171,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM lapennacchio@lbl.gov FU NCRR NIH HHS [P51-RR13086]; NHLBI NIH HHS [HL071954A, HL66681, P01-HL28972] NR 50 TC 24 Z9 25 U1 1 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD MAY 15 PY 2004 VL 13 IS 10 BP 1049 EP 1056 DI 10.1093/hmg/ddh121 PG 8 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA 816XN UT WOS:000221142700006 PM 15044382 ER PT J AU Yang, P Burns, GR Guo, JP Luk, TS Vawter, GA AF Yang, P Burns, GR Guo, JP Luk, TS Vawter, GA TI Femtosecond laser-pulse-induced birefringence in optically isotropic glass SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FUSED-SILICA AB We used a regeneratively amplified Ti:sapphire femtosecond laser to create optical birefringence in an isotropic glass medium. Between two crossed polarizers, regions modified by the femtosecond laser show bright transmission with respect to the dark background of the isotropic glass. This observation immediately suggests that these regions possess optical birefringence. The angular dependence of transmission through the laser-modified region is consistent with that of an optically birefringent material. Laser-induced birefringence is demonstrated in different glasses, including fused silica and borosilicate glass. Experimental results indicate that the optical axes of laser-induced birefringence can be controlled by the polarization direction of the femtosecond laser. The amount of laser-induced birefringence depends on the pulse energy level and number of accumulated pulses. (C) 2004 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Yang, P (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 11 TC 32 Z9 33 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5280 EP 5283 DI 10.1063/1.1707231 PG 4 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300003 ER PT J AU Kucheyev, SO Timmers, H Zou, J Williams, JS Jagadish, C Li, G AF Kucheyev, SO Timmers, H Zou, J Williams, JS Jagadish, C Li, G TI Lattice damage produced in GaN by swift heavy ions SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID LATENT TRACK FORMATION; 40 MEV FULLERENES; DISCONTINUOUS TRACKS; IMPLANTED GAN; IRRADIATION; ADHESION; SOLIDS; SEMICONDUCTORS; BOMBARDMENT; ENHANCEMENT AB Wurtzite GaN epilayers bombarded at 300 K with 200 MeV Au-197(16+) ions are studied by a combination of transmission electron microscopy (TEM) and Rutherford backscattering/channeling spectrometry (RBS/C). Results reveal the formation of near-continuous tracks propagating throughout the entire similar to1.5-mum-thick GaN film. These tracks, similar to100 Angstrom in diameter, exhibit a large degree of structural disordering but do not appear to be amorphous. Throughout the bombarded epilayer, high-resolution TEM reveals planar defects which are parallel to the basal plane of the GaN film. The gross level of lattice disorder, as measured by RBS/C, gradually increases with increasing ion fluence up to similar to10(13) cm(-2). For larger fluences, delamination of the nitride film from the sapphire substrate occurs. Based on these results, physical mechanisms of the formation of lattice disorder in GaN in such a high electronic stopping power regime are discussed. (C) 2004 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ New S Wales, Australian Def Force Acad, Sch Phys, Canberra, ACT 2600, Australia. Univ Queensland, Div Mat, Brisbane, Qld 4072, Australia. Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia. Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia. Ledex Corp, Kaohsiung Cty, Taiwan. RP Kucheyev, SO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM kucheyev1@llnl.gov RI Zou, Jin/B-3183-2009 OI Zou, Jin/0000-0001-9435-8043 NR 47 TC 50 Z9 52 U1 2 U2 14 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5360 EP 5365 DI 10.1063/1.1703826 PG 6 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300016 ER PT J AU Windisch, CF Exarhos, GJ Owings, RR AF Windisch, CF Exarhos, GJ Owings, RR TI Vibrational spectroscopic study of the site occupancy distribution of cations in nickel cobalt oxides SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID X-RAY; SURFACE-COMPOSITION; SPINELS; FILMS; TRANSITION; DISORDER; SPECTRA; REDUCTION; OXYGEN AB Mid-infrared, far-infrared, and Raman spectra for Ni1-xCoxOy indicated the systematic variation from a spinel-type (x=1.0) to an inverse spinel-type (x=0.67) lattice, through a multiphase transition region, to an NaCl-type (x<0.25) structure. Further analysis reveals that a decrease in x in this system is accompanied by the formation of octahedral/Ni2+, which, in the case of spinel compositions Ni1-xCoxO4/3 (x=0.67 to 1.0), results in substitution of Co3+ into tetrahedral sites and/or the redistribution of charge around some of the oxygen ions. The proposed transition region explains the observed break in continuity, at around x=0.5, in the previously reported resistivity data for nickel cobalt oxide films. (C) 2004 American Institute of Physics. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Florida, Gainesville, FL USA. RP Pacific NW Natl Lab, Richland, WA 99352 USA. NR 25 TC 47 Z9 47 U1 3 U2 17 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5435 EP 5442 DI 10.1063/1.1699505 PG 8 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300026 ER PT J AU Patterson, R Saw, CK Akella, J AF Patterson, R Saw, CK Akella, J TI Static high-pressure structural studies on Dy to 119 GPa SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RARE-EARTH-METALS; TRANSITION; EQUATION; CERIUM AB Structural phase transitions in the rare-earth metal dysprosium have been studied in a diamond anvil cell to 119 GPa by x-ray diffraction. Four transformations following the sequence hcp-->Sm-type-->dhcp-->hR24 (hexagonal)-->bcm (monoclinic) are observed at 6, 15, 43, and 73 GPa, respectively. The hexagonal to monoclinic transformation is accompanied by a 6% reduction in volume, which is attributed to delocalization of the 4f electrons, similar to that seen in Ce, Pr, and Gd. (C) 2004 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Patterson, R (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 16 TC 20 Z9 20 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5443 EP 5446 DI 10.1063/1.1699489 PG 4 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300027 ER PT J AU Pinnaduwage, LA Wig, A Hedden, DL Gehl, A Yi, D Thundat, T Lareau, RT AF Pinnaduwage, LA Wig, A Hedden, DL Gehl, A Yi, D Thundat, T Lareau, RT TI Detection of trinitrotoluene via deflagration on a microcantilever SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ATOMIC-FORCE MICROSCOPY; EXPLOSIVES DETECTION; VAPOR; SENSORS; MICROSENSOR; CANTILEVERS; ACTUATORS; ARRAYS AB We describe in detail the detection of deflagration of trinitrotoluene (TNT) deposited on a piezoresistive microcantilever and point out its possible use for explosive-vapor detection. The deflagration of TNT causes the cantilever to bend (due to released heat) and its resonance frequency to shift (due to mass unloading). Explosive vapors provide unique responses that are absent for "interferences" such as water or alcohol vapors. The proposed sensor makes possible a sensitive, miniature explosives detection device that may be deployed in large numbers. The minimum amount of TNT detected on the cantilever depends on the cantilever dimensions and was approximate to50 pg for the batch of cantilevers used. (C) 2004 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37966 USA. Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Transportat Secur Adm, US Dept Homeland Secur, Atlantic City, NJ 08405 USA. RP Pinnaduwage, LA (reprint author), Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. EM llp@ornl.gov NR 30 TC 58 Z9 61 U1 1 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5871 EP 5875 DI 10.1063/1.1697619 PG 5 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300090 ER PT J AU Li, L Jiles, DC AF Li, L Jiles, DC TI Modeling of the magnetomechanical effect: Application of the Rayleigh law to the stress domain (vol 93, pg 8480, 2003) SO JOURNAL OF APPLIED PHYSICS LA English DT Correction C1 Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA. Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Li, L (reprint author), Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA. EM gauss@ameslab.gov RI Jiles, David/H-9548-2012 NR 1 TC 2 Z9 2 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2004 VL 95 IS 10 BP 5934 EP 5934 DI 10.1063/1.1688987 PG 1 WC Physics, Applied SC Physics GA 818UF UT WOS:000221269300103 ER PT J AU Shabalovskaya, S Rondelli, G Anderegg, J Xiong, JP Wu, M AF Shabalovskaya, S Rondelli, G Anderegg, J Xiong, JP Wu, M TI Comparative corrosion performance of black oxide, sandblasted, and fine-drawn nitinol wires in potentiodynamic and potentiostatic tests: Effects of chemical etching and electropolishing SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS LA English DT Article DE nitinol wire; sandblasting; black oxide; chemically etching; electropolished surface; corrosion resistance; potentiodynamic; ASTM F 746 potentiostatic; inclusions ID SHAPE-MEMORY ALLOY; AORTIC ENDOGRAFTS; SURFACE; RESISTANCE; BIOCOMPATIBILITY; BEHAVIOR; STENT AB The corrosion performance of sandblasted (SB) and smooth fine-drawn (FD) medical-use nitinol wires was compared with the performance of wires with black oxide (BO) formed in air during their manufacture. Potentiodynamic and ASTM F746 potentiostatic tests in a 0.9 % NaCl solution were conducted on wires in their as-received, chemically etched, aged in boiling water, and electropolished states. As-received wires with various surface finishes revealed breakdown potentials in the range from -100 mV to +500 mV; similar passive current density, 10(-6) A/cm(2); and a wide hysteresis on the reverse scan, demonstrating strong susceptibility to localized corrosion. Chemically etched wires with original black oxide displayed consistent corrosion performance and surpassed, in corrosion resistance, electropolished wires that showed significantly lower breakdown (400-700 mV) and localized corrosion potentials (similar to -50 to +113 mV). Sandblasted and fine-drawn wires exhibited rather inconsistent corrosion behavior. In potentiodynamic tests these wires could perform with equal probability either on the level of pretreated BO wires or rather similar to as-received wires. Both SB and FD wires revealed low breakdown potentials in the PS regime. SEM analysis performed before tests indicated that sandblasting was not efficient for the complete removal of the original scaling, and fine drawing aggravated the situation, resulting in a persistent scaling that contributed to the inferior corrosion performance. Inclusions (oxides, carbides, and oxidized carbides) inherited from the bulk and retained on electropolished surfaces are the cause of their inferior performance compared to chemically etched surfaces. In electropolished wires corrosion was initiated around inclusions. (C) 2004 Wiley Periodicals, Inc. C1 Iowa State Univ, Ames Lab, DOE, Ames, IA 50011 USA. CNR, Inst Energy & Interface, Milan, Italy. Memry Corp, Bethel, CT USA. RP Shabalovskaya, S (reprint author), Iowa State Univ, Ames Lab, DOE, Room 324,Wilhelm Hall, Ames, IA 50011 USA. EM shabalov@ameslab.gov FU NHLBI NIH HHS [1 R01 HL67632-01] NR 30 TC 22 Z9 23 U1 0 U2 11 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0021-9304 J9 J BIOMED MATER RES B JI J. Biomed. Mater. Res. Part B PD MAY 15 PY 2004 VL 69B IS 2 BP 223 EP 231 DI 10.1002/jbm.b.30006 PG 9 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 818XQ UT WOS:000221278200014 PM 15116412 ER PT J AU Wood, BR Reimer, JA Bell, AT Janicke, MT Ott, KC AF Wood, BR Reimer, JA Bell, AT Janicke, MT Ott, KC TI Nitrous oxide decomposition and surface oxygen formation on Fe-ZSM-5 SO JOURNAL OF CATALYSIS LA English DT Article DE N2O; Fe-ZSM-5 ID DENSITY-FUNCTIONAL THEORY; N2O DECOMPOSITION; FEZSM-5 ZEOLITE; ACTIVE-SITES; LIGHT-OFF; OXIDATION; IRON; FE; FE/ZSM-5; BENZENE AB An investigation was conducted of the decomposition of N2O over Fe-ZSM-5. The zeolite used in this study was prepared with Fe and Al in the framework and is designated as Fe/Al-MFI (Si/Al = 84 and Fe/Al = 0.38). The as-prepared material was then calcined to remove the templating agent and pretreated at temperatures up to 1123 K. EXAFS characterization of the pretreated catalyst indicates that Fe is present as isolated Fe cations at cation-exhchange sites associated with framework Al. Above 548 K, N2O decomposes stoichiometrically to N-2 and O-2, but below 548 K, N2O decomposes to adsorbed oxygen and gas-phase N-2. Surface oxygen loadings are in the range of O/Fe-total = 0.10-0.14. For the stoichiometric decomposition of N2O to N-2 and O-2, the calculated values of the apparent activation energy and the preexponential factor are 44.2 kcal/mol and 9.9 x 108 mol N2O/(s mol Fe-total Pa N2O), respectively. The first step in the overall decomposition sequence is the dissociative adsorption of N20 to produce N-2 and an adsorbed O atom. The activation energy for this step is 16.8 kcal/mol and the preexponential factor is 1.4 x 10(1) mol N2O/(s mol Fe-total Pa N2O). The desorption of O-2 from iron sites occurs with an apparent activation energy of 45.7 kcal/mol and a preexponential factor of 8.9 x 10(12) mol O-2/(s mol Fe-total) (C) 2004 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Bell, AT (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EM bell@cchem.berkeley.edu OI Bell, Alexis/0000-0002-5738-4645 NR 32 TC 87 Z9 88 U1 5 U2 34 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9517 J9 J CATAL JI J. Catal. PD MAY 15 PY 2004 VL 224 IS 1 BP 148 EP 155 DI 10.1016/j.jcat.2004.02.025 PG 8 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 817TV UT WOS:000221200700016 ER PT J AU Jaramillo, E Wu, DT Grest, GS Curro, JG AF Jaramillo, E Wu, DT Grest, GS Curro, JG TI Anomalous mixing behavior of polyisobutylene/polypropylene blends: Molecular dynamics simulation study SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ANGLE NEUTRON-SCATTERING; THERMODYNAMIC INTERACTIONS; POLYOLEFIN BLENDS; ENSEMBLE AB The unusual mixing behavior of polyisobutylene (PIB) with head-to-head (hhPP) and head-to-tail polypropylene (PP) is studied using large-scale molecular dynamics (MD). The heats of mixing and Flory chi parameters were computed from MD simulations of both blends using a united atom model. The chi parameters from the simulations were estimated from the structure factors using the random phase approximation in analogy with neutron scattering (SANS) experiments. MD simulations for syndiotactic hhPP/PIB predicted a lower critical solution temperature with a chi parameter in very good agreement with SANS experiments on the atactic hhPP/PIB blend. MD simulations also predicted that the isotactic PP/PIB blend was immiscible at high molecular weight in qualitative agreement with cloud point measurements on atactic PP/PIB. (C) 2004 American Institute of Physics. C1 Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA. Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Jaramillo, E (reprint author), Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA. NR 14 TC 23 Z9 23 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2004 VL 120 IS 19 BP 8883 EP 8886 DI 10.1063/1.1742761 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 816YY UT WOS:000221146400001 PM 15267823 ER PT J AU Zhai, HJ Wang, LS Jena, P Gutsev, GL Bauschlicher, CW AF Zhai, HJ Wang, LS Jena, P Gutsev, GL Bauschlicher, CW TI Competition between linear and cyclic structures in monochromium carbide clusters CrCn- and CrCn (n=2-8): A photoelectron spectroscopy and density functional study SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC POPULATION ANALYSIS; MOLECULAR WAVE FUNCTIONS; GAUSSIAN-BASIS SETS; TRANSITION-METAL CLUSTERS; SMALL CHROMIUM CLUSTERS; CARBON CLUSTERS; AB-INITIO; THERMODYNAMIC PROPERTIES; ABINITIO CALCULATIONS; CORRELATION-ENERGY AB Photoelectron spectroscopy (PES) is combined with density functional theory (DFT) to study the monochromium carbide clusters CrCn- and CrCn (n=2-8). Well-resolved PES spectra were obtained, yielding structural, electronic, and vibrational information about both the anionic and neutral clusters. Experimental evidence was observed for the coexistence of two isomers for CrC2-, CrC3-, CrC4-, and CrC6-. Sharp and well-resolved PES spectra were observed for CrCn- (n=4,6,8), whereas broad spectra were observed for CrC5- and CrC7-. Extensive DFT calculations using the generalized gradient approximation were carried out for the ground and low-lying excited states of all the CrCn- and CrCn species, as well as coupled-cluster calculations for CrC2- and CrC2. Theoretical electron affinities and vertical detachment energies were calculated and compared with the experimental data to help the assignment of the ground states and obtain structural information. We found that CrC2- and CrC3- each possess a close-lying cyclic and linear structure, which were both populated experimentally. For the larger CrCn- clusters with n=4, 6, 8, linear structures are the overwhelming favorite, giving rise to the sharp PES spectral features. CrC7- was found to have a cyclic structure. The broad PES spectra of CrC5- suggested a cyclic structure, whereas the DFT results predicted a linear one. (C) 2004 American Institute of Physics. C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA. Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA. NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Zhai, HJ (reprint author), Washington State Univ, Dept Phys, Richland, WA 99352 USA. EM ls.wang@pnl.gov NR 81 TC 46 Z9 48 U1 1 U2 10 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2004 VL 120 IS 19 BP 8996 EP 9008 DI 10.1063/1.1701754 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 816YY UT WOS:000221146400013 PM 15267835 ER PT J AU Medvedev, DM Gray, SK AF Medvedev, DM Gray, SK TI A new expression for the direct quantum mechanical evaluation of the thermal rate constant SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CUMULATIVE REACTION PROBABILITY; TRANSITION-STATE THEORY; DEPENDENT SCHRODINGER-EQUATION; CHEMICAL-REACTIONS; WAVE-PACKET; ABSORBING POTENTIALS; MOLECULAR-DYNAMICS; HARTREE APPROACH; SYSTEMS; REPRESENTATION AB Based on the formalism of Miller, Schwartz, and Tromp [J. Chem. Phys. 79, 4889(1983)], we derive a new expression for the thermal rate constant for a chemical reaction. The expression involves an unperturbed, i.e., reactant or product channel Boltzmann operator for the imaginary time propagation, making it possible to compute efficiently the rate constant for a range of temperatures. We illustrate numerical aspects with an extensive study of the one-dimensional Eckart barrier problem, as well as a study of the three-dimensional (J=0) D+H-2 problem. (C) 2004 American Institute of Physics. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Medvedev, DM (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 51 TC 3 Z9 3 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2004 VL 120 IS 19 BP 9060 EP 9070 DI 10.1063/1.1697392 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 816YY UT WOS:000221146400018 PM 15267840 ER PT J AU Viehland, LA Goeringer, DE AF Viehland, LA Goeringer, DE TI Kinetic theory of radio frequency quadrupole ion traps. I. Trapping of atomic ions in a pure atomic gas SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TANDEM MASS-SPECTROMETRY; ELECTRIC-FIELDS; STORED IONS; TRANSPORT-COEFFICIENTS; INTERACTION POTENTIALS; STATISTICAL PROPERTIES; PARAMETRIC OSCILLATOR; 3-TEMPERATURE THEORY; CYCLOTRON RESONANCE; ARBITRARY STRENGTH AB A kinetic theory based on the Boltzmann equation is developed for the trapping of atomic ions in a radio-frequency quadrupole ion trap containing enough neutral atoms that ion-neutral collisions cannot be ignored. The collisions are treated at the same level of sophistication and detail as is used to deal with the time- and space-dependent electric fields in the trap. As a result, microscopic definitions are obtained for the damping and stochastic forces that originate from such collisions. These definitions contrast with corresponding phenomenological terms added ad hoc in previous treatments to create damped Mathieu and Langevin equations, respectively. Furthermore, the theory indicates that either collisional cooling or heating of the ions is possible, depending upon details of the ion-neutral mass ratios and interaction potential. The kinetic theory is not dependent on any special assumptions about the electric field strengths, the ion-neutral interaction potentials, or the ion-neutral mass ratio. It also provides an ab initio way to describe the ion kinetic energies, temperatures, and other properties by a series of successive approximations. (C) 2004 American Institute of Physics. C1 Chatham Coll, Div Sci, Pittsburgh, PA 15232 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Viehland, LA (reprint author), Chatham Coll, Div Sci, Pittsburgh, PA 15232 USA. NR 61 TC 3 Z9 3 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2004 VL 120 IS 19 BP 9090 EP 9103 DI 10.1063/1.1691405 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 816YY UT WOS:000221146400023 PM 15267845 ER PT J AU Kathmann, SM Schenter, GK Garrett, BC AF Kathmann, SM Schenter, GK Garrett, BC TI Multicomponent dynamical nucleation theory and sensitivity analysis SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRANSITION-STATE THEORY; VAPOR-LIQUID NUCLEATION; LENNARD-JONES SYSTEM; SULFURIC-ACID; BINARY NUCLEATION; HOMOGENEOUS NUCLEATION; NUMERICAL-CALCULATION; PHASE NUCLEATION; WATER; KINETICS AB Vapor to liquid multicomponent nucleation is a dynamical process governed by a delicate interplay between condensation and evaporation. Since the population of the vapor phase is dominated by monomers at reasonable supersaturations, the formation of clusters is governed by monomer association and dissociation reactions. Although there is no intrinsic barrier in the interaction potential along the minimum energy path for the association process, the formation of a cluster is impeded by a free energy barrier. Dynamical nucleation theory provides a framework in which equilibrium evaporation rate constants can be calculated and the corresponding condensation rate constants determined from detailed balance. The nucleation rate can then be obtained by solving the kinetic equations. The rate constants governing the multistep kinetics of multicomponent nucleation including sensitivity analysis and the potential influence of contaminants will be presented and discussed. (C) 2004 American Institute of Physics. C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Kathmann, SM (reprint author), Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RI Garrett, Bruce/F-8516-2011; Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 48 TC 16 Z9 16 U1 0 U2 6 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2004 VL 120 IS 19 BP 9133 EP 9141 DI 10.1063/1.1695323 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 816YY UT WOS:000221146400027 PM 15267849 ER PT J AU Balsara, NP Rappl, TJ Lefebvre, AA AF Balsara, NP Rappl, TJ Lefebvre, AA TI Does conventional nucleation occur during phase separation in polymer blends? SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS LA English DT Article DE nucleation; phase separation; blends; neutron scattering; thermodynamics ID ANGLE NEUTRON-SCATTERING; PROTONATED POLYBUTADIENE BLENDS; SPINODAL DECOMPOSITION; THERMODYNAMIC INTERACTIONS; DENSITY-FLUCTUATIONS; GINZBURG CRITERION; CRYSTAL NUCLEATION; CRITICAL LENGTH; INITIAL-STAGES; CRYSTALLIZATION AB The kinetics of liquid-liquid phase separation in off-critical polymer blends was studied with time-resolved small-angle neutron scattering. Our objective was to study the nature of the nuclei that formed during the initial stages of the phase transition. The blends were composed of model polyolefins-deuterium-labeled poly(methyl butylene) (PMB) and poly(ethyl butylene) (PEB)-with molecular weights of about 200 kg/mol. A direct examination of the initial clustering of molecules before macroscopic phase separation was possible because of the large size of the polymer chains and concomitant entanglement effects. We discovered that the scattering profiles obtained during nucleation merged at a well-defined critical scattering vector. We propose that this is the signature of the critical nucleus and that the size of the critical nucleus is inversely proportional to the magnitude of the critical scattering vector. The kinetic studies were preceded by a thorough characterization of the equilibrium thermodynamic properties of our PMB/PEB blends. The locations of the binodal and spinodal curves of our system are consistent with predictions based on the Flory-Huggins theory. This combination of thermodynamic and kinetic experiments enabled the quantification of the dependence of the size and structure of the critical nuclei on the quench depth. Our results do not agree with any of the previous theories on nucleation. Some aspects of our results are addressed in recent theoretical work by Wang in which the effects of fluctuations on the classical binodal and spinodal curves in polymer blends are incorporated. Both theory and experiment support the notion that the traditional stability limit (spinodal) should be replaced by a metastability limit. Although Wang's theory provides an explanation for some of our observations, many fundamental issues regarding nucleation in polymer blends remain unresolved. (C) 2004 Wiley Periodicals, Inc. C1 Lawrence Berkeley Natl Lab, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energies Technol Div, Berkeley, CA 94720 USA. RP Balsara, NP (reprint author), Lawrence Berkeley Natl Lab, Dept Chem Engn, Berkeley, CA 94720 USA. EM nbalsara@cchem.berkeley.edu NR 55 TC 27 Z9 28 U1 0 U2 22 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0887-6266 J9 J POLYM SCI POL PHYS JI J. Polym. Sci. Pt. B-Polym. Phys. PD MAY 15 PY 2004 VL 42 IS 10 BP 1793 EP 1809 DI 10.1002/polb.20055 PG 17 WC Polymer Science SC Polymer Science GA 816KC UT WOS:000221107800001 ER PT J AU Field, DP True, BW Lillo, TM Flinn, JE AF Field, DP True, BW Lillo, TM Flinn, JE TI Observation of twin boundary migration in copper during deformation SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE twin boundaries; copper; electron backscatter diffraction (EBSD); deformation ID FCC METALS; ALUMINUM; DISLOCATIONS AB A previous investigation produced evidence that twin boundaries in annealed copper were a significant source of dislocations during the initial stages of plastic flow. The character of the dislocation source was unknown, but it was hypothesized that twin boundaries could be non-regenerative dislocation sources that would cause migration of the boundary during plastic deformation. Channel die deformation and intermittent orientation imaging were performed on split specimens of pure copper in an attempt to observe twin boundary migration. Approximately 15% of the twin boundaries were observed to migrate beyond that expected from the imposed strain. The data support the hypothesis that twin boundaries can serve as dislocation sources. (C) 2004 Elsevier B.V. All rights reserved. C1 Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Univ Idaho, Idaho Falls, ID 83402 USA. RP Field, DP (reprint author), Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA. EM field@mme.wsu.edu RI Field, David/D-5216-2012; Lilllo, Thomas/S-5031-2016 OI Field, David/0000-0001-9415-0795; Lilllo, Thomas/0000-0002-7572-7883 NR 17 TC 41 Z9 42 U1 6 U2 18 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD MAY 15 PY 2004 VL 372 IS 1-2 BP 173 EP 179 DI 10.1016/j.msea.2003.12.044 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 821TC UT WOS:000221484600019 ER PT J AU Rohl, CA Strauss, CEM Chivian, D Baker, D AF Rohl, CA Strauss, CEM Chivian, D Baker, D TI Modeling structurally variable regions in homologous proteins with rosetta SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article DE comparative protein structure modeling; homology modeling; fragment assembly; CASP; loop modeling; structurally variable region ID AB-INITIO CONSTRUCTION; POLYPEPTIDE FRAGMENTS; MOLECULAR-DYNAMICS; COMBINED ALGORITHM; LOOPS; PREDICTION; SEARCH; CLASSIFICATION; CONFORMATIONS; GENERATION AB A major limitation of current comparative modeling methods is the accuracy with which regions that are structurally divergent from homologues of known structure can be modeled. Because structural differences between homologous proteins are responsible for variations in protein function and specificity, the ability to model these differences has important functional consequences. Although existing methods can provide reasonably accurate models of short loop regions, modeling longer structurally divergent regions is an unsolved problem. Here we describe a method based on the de novo structure prediction algorithm, Rosetta, for predicting conformations of struc-turally divergent regions in comparative models. Initial conformations for short segments are selected from the protein structure database, whereas longer segments are built up by using three- and nine-residue fragments drawn from the database and combined by using the Rosetta algorithm. A gap closure term in the potential in combination with modified Newton's method for gradient descent minimization is used to ensure continuity of the peptide backbone. Conformations of variable regions are refined in the context of a fixed template structure using Monte Carlo minimization together with rapid repacking of side-chains to iteratively optimize backbone torsion angles and side-chain rotamers. For short loops, mean accuracies of 0.69, 1.45, and 3.62 Angstrom are obtained for 4, 8, and 12 residue loops, respectively. In addition, the method can provide reasonable models of conformations of longer protein segments: predicted conformations of 3Angstrom root-mean-square deviation or better were obtained for 5 of 10 examples of segments ranging from 13 to 34 residues. In combination with a sequence alignment algorithm, this method generates complete, un-gapped models of protein structures, including regions both similar to and divergent from a homologous structure. This combined method was used to make predictions for 28 protein domains in the Critical Assessment of Protein Structure 4 WASP 4) and 59 domains in CASP 5, where the method ranked highly among comparative modeling and fold recognition methods. Model accuracy in these blind predictions is dominated by alignment quality, but in the context of accurate alignments, long protein segments can be accurately modeled. Notably, the method correctly predicted the local structure of a 39-residue insertion into a TIM barrel in CASP 5 target T0186. (C) 2004 Wiley-Liss, Inc. C1 Univ Calif Santa Cruz, Dept Biomol Engn, Santa Cruz, CA 95064 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. Univ Washington, Dept Biochem, Seattle, WA 98195 USA. Univ Washington, Howard Hughes Med Inst, Seattle, WA 98195 USA. RP Rohl, CA (reprint author), Univ Calif Santa Cruz, Dept Biomol Engn, Santa Cruz, CA 95064 USA. EM rohl@ucsc.edu RI Rohl, Carol/I-2589-2012; Baker, David/K-8941-2012 OI Rohl, Carol/0000-0002-9229-3917; Baker, David/0000-0001-7896-6217 FU NHGRI NIH HHS [T32 HG00035-06] NR 49 TC 220 Z9 227 U1 1 U2 17 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD MAY 15 PY 2004 VL 55 IS 3 BP 656 EP 677 DI 10.1002/prot10629 PG 22 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 818ML UT WOS:000221249100019 PM 15103629 ER PT J AU Schwarzenbacher, R Jaroszewski, L von Delft, F Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chu, HJ Dai, XP Deacon, AM Didonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Quijano, K Robb, A Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Wilson, IA AF Schwarzenbacher, R Jaroszewski, L von Delft, F Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chu, HJ Dai, XP Deacon, AM Didonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Quijano, K Robb, A Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Wilson, IA TI Crystal structure of an aspartate aminotransferase (TM1255) from Thermotoga maritima at 1.90 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID THERMUS-THERMOPHILUS HB8; ELECTRON-DENSITY; REFINEMENT; PROGRAM; COMPLEX C1 Scripps Res Inst, Joint Ctr Struct Genom, La Jolla, CA 92037 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA USA. Novartis Res Fdn, Genom Inst, San Diego, CA USA. San Diego Supercomp Ctr, La Jolla, CA USA. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Wilson, IA (reprint author), Scripps Res Inst, Joint Ctr Struct Genom, BCC206,10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM wilson@scripps.edu RI Godzik, Adam/A-7279-2009 OI Godzik, Adam/0000-0002-2425-852X FU NIGMS NIH HHS [P50 GM62411] NR 18 TC 11 Z9 12 U1 0 U2 15 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD MAY 15 PY 2004 VL 55 IS 3 BP 759 EP 763 DI 10.1002/prot.10646 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 818ML UT WOS:000221249100028 PM 15103638 ER PT J AU Schwarzenbacher, R Jaroszewski, L von Delft, F Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chiu, HJ Dai, XP Deacon, AM DiDonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Velasquez, J Vincent, J Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Wilson, IA AF Schwarzenbacher, R Jaroszewski, L von Delft, F Abdubek, P Ambing, E Biorac, T Brinen, LS Canaves, JM Cambell, J Chiu, HJ Dai, XP Deacon, AM DiDonato, M Elsliger, MA Eshagi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Hampton, E Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA Levin, I McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Page, R Velasquez, J Vincent, J Wang, XH West, B Wolf, G Xu, QP Hodgson, KO Wooley, J Wilson, IA TI Crystal structure of a type II quinolic acid phosphoribosyltransferase (TM1645) from Thermotoga maritima at 2.50 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID ELECTRON-DENSITY; PROGRAM C1 Scripps Res Inst, La Jolla, CA 92037 USA. San Diego Supercomp Ctr, La Jolla, CA 92093 USA. Novartis Res Fdn, Genom Inst, San Diego, CA 92121 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Wilson, IA (reprint author), Scripps Res Inst, BCC206,10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM wilson@scripps.edu RI Godzik, Adam/A-7279-2009 OI Godzik, Adam/0000-0002-2425-852X FU NIGMS NIH HHS [P50 GM62411] NR 18 TC 15 Z9 15 U1 0 U2 7 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD MAY 15 PY 2004 VL 55 IS 3 BP 768 EP 771 DI 10.1002/prot.20029 PG 4 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 818ML UT WOS:000221249100030 PM 15103640 ER PT J AU Zhang, CLL Lanoil, B AF Zhang, CLL Lanoil, B TI Geomicrobiology and biogeochemistry of gas hydrates and cold seeps SO CHEMICAL GEOLOGY LA English DT Editorial Material ID GULF-OF-MEXICO; MASSIVE DISSOCIATION; ISOTOPIC EVIDENCE; METHANE HYDRATE; CAP CARBONATES; OXIDATION; COMMUNITIES; SEDIMENTS; ARCHAEA C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Georgia, Dept Marine Sci, Aiken, SC 29802 USA. Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA. RP Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. EM zhang@srel.edu; brian.lanoil@ucr.edu OI Lanoil, Brian/0000-0001-8603-8330 NR 27 TC 9 Z9 22 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 EI 1878-5999 J9 CHEM GEOL JI Chem. Geol. PD MAY 14 PY 2004 VL 205 IS 3-4 BP 187 EP 194 DI 10.1016/j.chemgeo.2004.01.001 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 820JF UT WOS:000221384300001 ER PT J AU Formolo, MJ Lyons, TW Zhang, CL Kelley, C Sassen, R Horita, J Cole, DR AF Formolo, MJ Lyons, TW Zhang, CL Kelley, C Sassen, R Horita, J Cole, DR TI Quantifying carbon sources in the formation of authigenic carbonates at gas hydrate sites in the Gulf of Mexico SO CHEMICAL GEOLOGY LA English DT Article DE Gulf of Mexico; authigenic carbonates; methane ID OXYGEN ISOTOPE FRACTIONATION; ANAEROBIC METHANE OXIDATION; CASCADIA SUBDUCTION ZONE; CONTINENTAL-SLOPE; SEDIMENTS; REDUCTION; DEEP; HYDROGEN; SURFACE; SULFUR AB The northern slope of the Gulf of Mexico is known for extensive venting of methane and other hydrocarbons as related to active salt diapirism and associated fault conduits which link world-class subsurface reserves to seafloor seeps. These venting hydrocarbons fuel extensive micro- and macrofaunal cold seep communities. Of particular interest is the relationship between anaerobic methane-oxidizing archaea and sulfate-reducing bacteria. It has been suggested that sulfate-dependent anaerobic methane oxidation dominates carbon oxidation and attendant authigenic carbonate precipitation at these sites. To test this assumption, we have quantified the relative contributions of dissolved carbon dioxide (SigmaCO(2)) from a variety of sources-specifically seawater, organic matter, methane, and non-methane liquid and gaseous hydrocarbons-using the carbon isotope compositions of authigenic carbonates and a simple isotopic mass balance. Our model, and a small but representative suite of data from the Gulf, demonstrates that methane is a contributor but is not the dominant source of metabolic energy at the sites of active venting. Instead, oxidation of non-methane hydrocarbons appears to be the primary source of carbonate alkalinity. The secondary role played by methane oxidation has been independently recognized by other workers from organic biomarker relationships and from disparities observed between measured rates of sulfate reduction and methane oxidation. Despite the domination of the carbon reservoir by non-methane sources, oxygen isotope data for the authigenic carbonates bear the mark of appreciable gas hydrate dissociation. This study, rather than being an exhaustive survey of Gulf of Mexico seeps, is intended only to provide a template for the investigation of the abundant authigenic carbonate deposits distributed throughout the geologic record. As in the Gulf of Mexico, many modem and ancient cold seeps are characterized by a complex interplay of carbon sources readily preserved in the delta(13)C values of carbonates. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Missouri, Dept Geol Sci, Columbia, MO 65201 USA. Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Georgia, Dept Marine Sci, Aiken, SC 29802 USA. Texas A&M Univ, Geochem & Environm Res Grp, College Stn, TX 77845 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Formolo, MJ (reprint author), Univ Missouri, Dept Geol Sci, 101 Geol Sci Bldg, Columbia, MO 65201 USA. EM mjfd77@mizzou.edu RI Kelley, Cheryl/K-9392-2015 NR 35 TC 80 Z9 87 U1 1 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD MAY 14 PY 2004 VL 205 IS 3-4 BP 253 EP 264 DI 10.1016/j.chemgeo.2003.12.021 PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 820JF UT WOS:000221384300005 ER PT J AU Colwell, F Matsumoto, R Reed, D AF Colwell, F Matsumoto, R Reed, D TI A review of the gas hydrates, geology, and biology of the Nankai Trough SO CHEMICAL GEOLOGY LA English DT Review DE gas hydrates; Nankai Trough; sediments ID DEEP MARINE-SEDIMENTS; MICROBIAL COMMUNITIES; CASCADIA MARGIN; BACTERIAL-POPULATIONS; PHYLOGENETIC ANALYSIS; ACCRETIONARY WEDGE; MOLECULAR ANALYSIS; METHANE OXIDATION; SUBDUCTION ZONE; SEA-FLOOR AB In this paper, we review research conducted during the last 20 years on the active margin that forms the Nankai Trough off the southwest coast of Japan. The Nankai Trough exists along the convergent plate boundary between the Philippine Sea and Eurasian plates. An accretionary prism and a forearc basin occur landward of the Nankai Trough. Gas hydrates have been acquired through coring in the forearc basin. Bottom simulating reflectors (BSRs), an indicator of free gas which often subtends hydrate-bearing strata, are present throughout the Nankai Trough. Slope sediments are mainly composed of fine-grained materials with low reflectivity. Instability, possibly caused by uplift or tectonic activity, occurs in the Nankai Trough with sliding being a major factor in the structuring of the terrain. Clam colonies (Calyptogena spp.) have been observed in numerous locations suggesting fluid flow along major thrust faults. When first reported, these clams represented members of the genus that had not previously been described. Most of the detailed information regarding the methane hydrates of the Nankai Trough comes from the drilling of three test wells 50 km off the Omaezaki Peninsula in water depths of 945 m. The sediments from these boreholes were dominated by calcareous, dark gray clay/silt and siltstone, with a tendency to become sandier toward the bottom of the hole. Cores collected in zones above, within, and below the hydrate-bearing strata in these boreholes show pore water chloride concentrations ranging between 100 and 550 mM with a highly variable interval occurring between 150 and 270 m below sea floor (mbsf). Compared with seawater values of similar to 550 mM, the freshening of the porewater extracted from the cores strongly suggests the presence of gas hydrates in sediments. Pore saturation of gas hydrate estimated from the chloride anomaly was as high as 80% in sandstones in some of the sediments. Direct counts of microorganisms in the samples show cell density at 10(5) cells/g throughout the hydrate strata, consistent with other marine sediments that have been studied. Clone libraries of the 16S, RNA gene created from extracted DNA from the Nankai Trough sediments and isolates from sediment microbial enrichments indicate the presence of methanogenic microorganisms. Sequence analysis suggests that the microbial community in the Nankai Trough sediments is distinct from those in previously characterized methane hydrate-bearing sediments on the Cascadia Margin and in the Gulf of Mexico. The majority of the sequences from the Nankai Trough clone library were either of a novel lineage or most closely related to uncultured clones. Bacterial clones exhibited sequence phylogenetic relatedness to Bacteroidetes, Planctomycetes, Actinobacteria, Proteobacteria and green nonsulfur groups, whereas the archaeal clones could be classified within the Euryarchaeota and Crenarchaeota. Continued investigations of the Nankai Trough sediments will add to our understanding of the biogeochemical characteristics of this active margin that is so important to the islands of Japan. (C) 2004 Elsevier B.V. All rights reserved. C1 Idaho Natl Engn & Environm Lab, Dept Biotechnol, Idaho Falls, ID 83415 USA. Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo 113003, Japan. RP Colwell, F (reprint author), Idaho Natl Engn & Environm Lab, Dept Biotechnol, POB 1625, Idaho Falls, ID 83415 USA. EM fxc@inel.gov; ryo@eps.s.u-tokyo.ac.jp; reeddw@inel.gov RI Reed, David/C-3337-2017 OI Reed, David/0000-0003-4877-776X NR 55 TC 33 Z9 39 U1 2 U2 26 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD MAY 14 PY 2004 VL 205 IS 3-4 BP 391 EP 404 DI 10.1016/j.chemgeo.2003.12.023 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 820JF UT WOS:000221384300011 ER PT J AU Choi, C Kalosakas, G Rasmussen, K Hiromura, M Bishop, A Usheva, A AF Choi, C Kalosakas, G Rasmussen, K Hiromura, M Bishop, A Usheva, A TI Thermally-induced openings in promoter DNA correspond with transcriptionally important sites SO FASEB JOURNAL LA English DT Meeting Abstract CT Annual Meeting of the American-Society-for-Biochemistry-and-Molecular-Biology/8th Congress of the International-Union-for-Biochemistry-and-Molecular-Biology CY JUN 12-16, 2004 CL Boston, MA SP Amer Soc BioChem & Mol Biol, Int Union Biochem & Mol Biol C1 Beth Israel Deaconess Med Ctr, Boston, MA 02215 USA. Harvard Univ, Sch Med, Cambridge, MA 02138 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Hokkaido Univ, Sapporo, Hokkaido 060, Japan. RI Rasmussen, Kim/B-5464-2009; Kalosakas, George/L-6211-2013 OI Rasmussen, Kim/0000-0002-4029-4723; Kalosakas, George/0000-0001-7763-718X NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD MAY 14 PY 2004 VL 18 IS 8 SU S BP C150 EP C150 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA 823UP UT WOS:000221639100693 ER PT J AU Neeley, WL Henderson, PT Delaney, JC Essigmann, JM AF Neeley, WL Henderson, PT Delaney, JC Essigmann, JM TI In vivo bypass efficiencies and mutational signatures of the guanine oxidation products 2-aminoimidazolone and 5-guanidino-4-nitroimidazole SO FASEB JOURNAL LA English DT Meeting Abstract CT Annual Meeting of the American-Society-for-Biochemistry-and-Molecular-Biology/8th Congress of the International-Union-for-Biochemistry-and-Molecular-Biology CY JUN 12-16, 2004 CL Boston, MA SP Amer Soc BioChem & Mol Biol, Int Union Biochem & Mol Biol C1 MIT, Dept Chem, Cambridge, MA 02139 USA. MIT, Biol Engn Div, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Biotechnol Res Program, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD MAY 14 PY 2004 VL 18 IS 8 SU S BP C304 EP C304 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA 823UP UT WOS:000221639101404 ER PT J AU Uchiki, T Gupta, V Hettich, R Dealwis, C AF Uchiki, T Gupta, V Hettich, R Dealwis, C TI Phosphorylation and oligomeric state of yeast ribonucleotide reductase inhibitor Sml1 SO FASEB JOURNAL LA English DT Meeting Abstract CT Annual Meeting of the American-Society-for-Biochemistry-and-Molecular-Biology/8th Congress of the International-Union-for-Biochemistry-and-Molecular-Biology CY JUN 12-16, 2004 CL Boston, MA SP Amer Soc BioChem & Mol Biol, Int Union Biochem & Mol Biol C1 Univ Tennessee, Knoxville, TN USA. Univ Delhi, New Delhi, India. Oak Ridge Natl Lab, Oak Ridge, TN USA. RI Hettich, Robert/N-1458-2016 OI Hettich, Robert/0000-0001-7708-786X NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0892-6638 J9 FASEB J JI Faseb J. PD MAY 14 PY 2004 VL 18 IS 8 SU S BP C283 EP C283 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA 823UP UT WOS:000221639101308 ER PT J AU Blaustein, M Pelisch, F Coso, OA Bissell, MJ Kornblihtt, AR Srebrow, A AF Blaustein, M Pelisch, F Coso, OA Bissell, MJ Kornblihtt, AR Srebrow, A TI Mammary epithelial-mesenchymal interaction regulates fibronectin alternative splicing via phosphatidylinositol 3-kinase SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID METALLOPROTEINASE GENE-EXPRESSION; GROWTH-FACTOR; EDA EXON; EXTRACELLULAR-MATRIX; SIGNAL-TRANSDUCTION; GLAND DEVELOPMENT; PREMESSENGER RNA; EIIIA SEGMENT; CELL-ADHESION; IIICS REGION AB The way alternative splicing is regulated within tissues is not understood. A relevant model of this process is provided by fibronectin, an important extracellular matrix protein that plays a key role in cell adhesion and migration and contains three alternatively spliced regions known as EDI, EDII, and IIICS. We used a cell culture system to simulate mammary epithelial-stromal communication, a process that is crucial for patterning and function of the mammary gland, and studied the effects of extracellular signals on the regulation of fibronectin pre-mRNA alternative splicing. We found that soluble factors from a mammary mesenchymal cell-conditioned medium, as well as the growth factors HGF/SF ( hepatocyte growth factor/scatter factor), KGF ( keratinocyte growth factor), and aFGF ( acidic fibroblast growth factor), stimulate EDI and IIICS but not EDII inclusion into fibronectin mRNA in the mammary epithelial cell line SCp2, favoring fibronectin isoforms associated with proliferation, migration, and tissue remodeling. We explored the signaling pathways involved in this regulation and found that the mammary mesenchymal cell-conditioned medium and HGF/SF act through a phosphatidylinositol 3-kinase-dependent cascade to alter fibronectin alternative splicing. This splicing regulation is independent from promoter structure and de novo protein synthesis but does require two exonic elements within EDI. These results shed light on how extracellular stimuli are converted into changes in splicing patterns. C1 Univ Buenos Aires, Lab Fisiol & Biol Mol,Dept Fisiol Biol Mol & Celu, Inst Fisiol Biol Mol & Neurociencias, Consejo Nacl Invest Cient & Tecn,Fac Ciencias Exa, Buenos Aires, DF, Argentina. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Srebrow, A (reprint author), Univ Buenos Aires, Lab Fisiol & Biol Mol,Dept Fisiol Biol Mol & Celu, Inst Fisiol Biol Mol & Neurociencias, Consejo Nacl Invest Cient & Tecn,Fac Ciencias Exa, Ciudad Univ,Pabellon 2,C1428EHA, Buenos Aires, DF, Argentina. EM asrebrow@fbmc.fcen.uba.ar RI Pelisch, Federico/C-3815-2011; OI Pelisch, Federico/0000-0003-4575-1492; Kornblihtt, Alberto/0000-0003-4322-0831; Blaustein, Matias/0000-0001-6309-6888 NR 50 TC 43 Z9 45 U1 0 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAY 14 PY 2004 VL 279 IS 20 BP 21029 EP 21037 DI 10.1074/jbc.M314260200 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 818VY UT WOS:000221273800059 PM 15028734 ER PT J AU Holladay, JD Jones, EO Dagle, RA Xia, GG Cao, C Wang, Y AF Holladay, JD Jones, EO Dagle, RA Xia, GG Cao, C Wang, Y TI High efficiency and low carbon monoxide micro-scale methanol processors SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 8th Grove Fuel Cell Symposium CY SEP 24-26, 2003 CL London, ENGLAND DE microreactor; fuel processing; methanol reformer; fuel cells AB A micro-scale power supply is being developed to provide an alternative to current secondary batteries for use in microelectronics devices, such as microsensors. The work discussed in this paper expands on this earlier reported sub-watt power generation system. Two designs were evaluated: a processor optimized to improve the thermal efficiency of the methanol reforming reactor from 9 to above 20%, and a system tailored to decrease the carbon monoxide levels to below 500 ppm, preferably lower than 100 ppm. Each design was operated over a range of feed flow rates. Thermal efficiencies up to 33% were demonstrated with the optimized processor, likely as a result of the low operating temperature, high methanol concentration (similar to60 wt.%) in the feed, and the high hydrogen production. Up to 3.55 sccm hydrogen was produced with relatively low carbon monoxide. In the second design, significant decreases in carbon monoxide, in some cases below 100 ppm, were achieved while maintaining reasonable thermal efficiencies of up to 19%. (C) 2004 Elsevier B.V. All rights reserved. C1 Battelle Mem Inst, Pacific NW Div, Richland, WA 99352 USA. RP Holladay, JD (reprint author), Battelle Mem Inst, Pacific NW Div, POB 999 MS K8-93, Richland, WA 99352 USA. EM jamelyn.holladay@pnl.gov RI Wang, Yong/C-2344-2013 NR 9 TC 68 Z9 70 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 14 PY 2004 VL 131 IS 1-2 BP 69 EP 72 DI 10.1016/j.jpowsour.2004.01.003 PG 4 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 820VX UT WOS:000221418800010 ER PT J AU Williams, MC Strakey, JP Singhal, SC AF Williams, MC Strakey, JP Singhal, SC TI US distributed generation fuel cell program SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT 8th Grove Fuel Cell Symposium CY SEP 24-26, 2003 CL London, ENGLAND DE stationary power; distributed generation; cogeneration; solid oxide fuel cell; molten carbonate fuel cell; hybrids ID TECHNOLOGY; FILMS AB The Department of Energy (DOE) is the largest funder of fuel cell technology in the U.S. The Department of Energy-Office of Fossil Energy (FE) is developing high temperature fuel cells for distributed generation. It has funded the development of tubular solid oxide fuel cell (SOFC) and molten carbonate fuel cell (MCFC) power systems operating at up to 60% efficiency on natural gas. The remarkable environmental performance of these fuel cells makes them likely candidates to help mitigate pollution. DOE is now pursuing more widely applicable solid oxide fuel cells for 2010 and beyond. DOE estimates that a 5 kW solid oxide fuel cell system can reach $400 per kW at reasonable manufacturing volumes. SECA-the Solid State Energy Conversion Alliance-was formed by the National Energy Technology Laboratory (NETL) and the Pacific Northwest National Laboratory (PNNL) to accelerate the commercial readiness of planar and other solid oxide fuel cell systems utilizing 3-10 kW size modules by taking advantage of the projected economies of production from a "mass customization" approach. In addition, if the modular 3-10 kW size units can be "ganged" or "scaled-up" to larger sizes with no increase in cost, then commercial, microgrid, and other distributed generation markets will become attainable. Further scale-up and hybridization of SECA SOFCs with gas turbines could result in penetration of the bulk power market. This paper reviews the current status of the solid oxide and molten carbonate fuel cells in the U.S. (C) 2004 Published by Elsevier B.V. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA USA. US DOE, Natl Energy Technol Lab, Morgantown, WV USA. RP Singhal, SC (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. EM singhal@pnl.gov NR 13 TC 124 Z9 131 U1 3 U2 33 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 14 PY 2004 VL 131 IS 1-2 BP 79 EP 85 DI 10.1016/j.jpowsour.2004.01.021 PG 7 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 820VX UT WOS:000221418800012 ER PT J AU Belonoshko, AB Simak, SI Kochetov, AE Johansson, B Burakovsky, L Preston, DL AF Belonoshko, AB Simak, SI Kochetov, AE Johansson, B Burakovsky, L Preston, DL TI High-pressure melting of molybdenum SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRUCTURAL PHASE-TRANSITIONS; RESOLVED PHOTOELECTRON-SPECTROSCOPY; TOTAL-ENERGY CALCULATIONS; EQUATION-OF-STATE; WAVE BASIS-SET; MOLECULAR-DYNAMICS; SHOCK COMPRESSION; ELECTRONIC-STRUCTURE; MO; METALS AB The melting curve of the body-centered cubic (bcc) phase of Mo has been determined for a wide pressure range using both direct ab initio molecular dynamics simulations of melting as well as a phenomenological theory of melting. These two methods show very good agreement. The simulations are based on density functional theory within the generalized gradient approximation. Our calculated equation of state of bcc Mo is in excellent agreement with experimental data. However, our melting curve is substantially higher than the one determined in diamond anvil cell experiments up to a pressure of 100 GPa. An explanation is suggested for this discrepancy. C1 Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden. Royal Inst Technol, Condensed Matter Theory Grp, S-10691 Stockholm, Sweden. Univ Uppsala, Dept Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden. Los Alamos Natl Lab, Div Theoret Phys, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. RP Belonoshko, AB (reprint author), Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden. RI Simak, Sergei/C-3030-2014; OI Simak, Sergei/0000-0002-1320-389X; Belonoshko, Anatoly/0000-0001-7531-3210 NR 48 TC 65 Z9 68 U1 1 U2 16 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 195701 DI 10.1103/PhysRevLett.92.195701 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900028 PM 15169417 ER PT J AU Blagoev, KB Bedell, KS Littlewood, PB AF Blagoev, KB Bedell, KS Littlewood, PB TI Comment on "Coexistence of superconductivity and ferromagnetism in ferromagnetic metals'' - Reply SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. Boston Coll, Dept Phys, Boston, MA 02167 USA. Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Blagoev, KB (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. RI Cavendish, TCM/C-9489-2009; Littlewood, Peter/B-7746-2008 NR 6 TC 5 Z9 5 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 199706 DI 10.1103/PhysRevLett.92.199706 PG 1 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900080 ER PT J AU Clark, JA Savard, G Sharma, KS Vaz, J Wang, JC Zhou, Z Heinz, A Blank, B Buchinger, F Crawford, JE Gulick, S Lee, JKP Levand, AF Seweryniak, D Sprouse, GD Trimble, W AF Clark, JA Savard, G Sharma, KS Vaz, J Wang, JC Zhou, Z Heinz, A Blank, B Buchinger, F Crawford, JE Gulick, S Lee, JKP Levand, AF Seweryniak, D Sprouse, GD Trimble, W TI Precise mass measurement of Se-68, a waiting-point nuclide along the rp process SO PHYSICAL REVIEW LETTERS LA English DT Article ID ACCRETING NEUTRON-STARS; PENNING TRAP; EXOTIC NUCLEI; BETA-DECAY; ION; FRAGMENTATION; ELECTRON AB Mass measurements of Ge-68, As-68, and Se-68 have been obtained with the Canadian Penning Trap mass spectrometer. The results determine the mass excess of Se-68 as -54 232 (19) keV, the first measurement with a precision and reliability sufficient to address the light-curve and energy output of x-ray bursts as well as the abundances of the elements synthesized. Under typical conditions used for modeling x-ray bursts, Se-68 is found to cause a significant delay in the rp process nucleosynthesis. C1 Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. CEN Bordeaux Gradignan, F-33175 Gradignan, France. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA. RP Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada. RI Sprouse, Gene/C-3397-2009; Crawford, John/A-3771-2012; Heinz, Andreas/E-3191-2014; OI Trimble, William L./0000-0001-7029-2676 NR 28 TC 58 Z9 59 U1 1 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 192501 DI 10.1103/PhysRevLett.92.192501 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900008 PM 15169397 ER PT J AU Daschbach, JL Schenter, GK Ayotte, P Smith, RS Kay, BD AF Daschbach, JL Schenter, GK Ayotte, P Smith, RS Kay, BD TI Helium diffusion through H2O and D2O amorphous ice: Observation of a lattice inverse isotope effect SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOLID WATER; MOLECULAR-BEAMS; LIQUID WATER; 150 K; MORPHOLOGY; ATOMS; IH AB The diffusion of He through both H2O and D2O amorphous solid water (ASW) has been measured between 55 and 110 K. We find the diffusion rate is dependent on the isotopic composition of the ASW lattice. This lattice isotope effect is the "inverse'' of a normal isotope effect in that diffusion is faster in the heavier (D2O) isotope. Transition state theory calculations show that the inverse isotope effect is due to a tight transition state and predominantly arises from the zero-point vibrational energy associated with the frustrated rotational modes of water in the lattice. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Kay, BD (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, POB 999,Mail Stop K8-88, Richland, WA 99352 USA. RI Schenter, Gregory/I-7655-2014; Smith, Scott/G-2310-2015 OI Schenter, Gregory/0000-0001-5444-5484; Smith, Scott/0000-0002-7145-1963 NR 17 TC 10 Z9 10 U1 2 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 198306 DI 10.1103/PhysRevLett.92.198306 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900069 PM 15169458 ER PT J AU Golov, AI Einzel, D Lawes, G Matsumoto, K Parpia, JM AF Golov, AI Einzel, D Lawes, G Matsumoto, K Parpia, JM TI Dissipation mechanisms near the superfluid He-3 transition in aerogel SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHASE-TRANSITION; LIQUID-HE-3; PROPAGATION; SCATTERING; TRANSPORT; VISCOSITY; SOUND AB We have investigated the dissipation (Q(-1)) using the torsion pendulum technique for pure He-3 and He-3-He-4 mixtures in silica aerogel near the He-3 superfluid transition (T-c) in aerogel. With pure He-3 the Q(-1) decreases at the onset of superfluidity. When phase separated He-3-He-4 mixtures are introduced into the aerogel, the Q(-1) does not decrease as rapidly and eventually increases for the highest He-4 content. We provide a model for the related attenuation of transverse sound alpha that takes into account elastic and inelastic scattering processes and exhibits a decrease in alpha at T-c. C1 Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA. Univ Manchester, Schuster Lab, Manchester M13 9PL, Lancs, England. Walther Meissner Inst Tieftemp Forsch, D-85748 Garching, Germany. Los Alamos Natl Lab, Los Alamos, NM 87505 USA. Kanazawa Univ, Kanazawa, Ishikawa 9201192, Japan. RP Golov, AI (reprint author), Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA. NR 28 TC 0 Z9 0 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 195301 DI 10.1103/PhysRevLett.92.195301 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900023 ER PT J AU Joglekar, YN MacDonald, AH AF Joglekar, YN MacDonald, AH TI Comment on "Coexistence of superconductivity and ferromagnetism in ferromagnetic metals'' SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. Univ Texas, Dept Phys, Austin, TX 78712 USA. RP Joglekar, YN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. NR 7 TC 7 Z9 7 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 199705 DI 10.1103/PhysRevLett.92.199705 PG 1 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900079 PM 15169468 ER PT J AU Niklasson, AMN Challacombe, M AF Niklasson, AMN Challacombe, M TI Density matrix perturbation theory SO PHYSICAL REVIEW LETTERS LA English DT Article ID CONSISTENT-FIELD THEORY; PURIFICATION; ENVIRONMENT; SCHEME AB An orbital-free quantum perturbation theory is proposed. It gives the response of the density matrix upon variation of the Hamiltonian by quadratically convergent recursions based on perturbed projections. The technique allows treatment of embedded quantum subsystems with a computational cost scaling linearly with the size of the perturbed region, O(N-pert.), and as O(1) with the total system size. The method allows efficient high order perturbation expansions, as demonstrated with an example involving a 10th order expansion. Density matrix analogs of Wigner's 2n + 1 rule are also presented. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Niklasson, AMN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM amn@lanl.gov NR 30 TC 50 Z9 50 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 193001 DI 10.1103/PhysRevLett.92.193001 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900009 PM 15169398 ER PT J AU Saxena, A Castan, T Planes, A Porta, M Kishi, Y Lograsso, TA Viehland, D Wuttig, M De Graef, M AF Saxena, A Castan, T Planes, A Porta, M Kishi, Y Lograsso, TA Viehland, D Wuttig, M De Graef, M TI Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials SO PHYSICAL REVIEW LETTERS LA English DT Article ID SHAPE-MEMORY ALLOYS; MARTENSITIC TRANSFORMATIONS; PHASE-TRANSITIONS; BEHAVIOR; AL; SCATTERING; DISORDER; NI2MNGA; DRIVEN AB Based on experimental observations of modulated magnetic patterns in a Co0.5Ni0.205Ga0.295 alloy, we propose a model to describe a ( purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie (or Neel) temperature due to magnetic disorder. The latter results from compositional fluctuations coupling to strain and then to magnetism through the magnetoelastic interaction above the structural transition temperature. We discuss the origin of purely magnetic and magnetoelastic precursor modulations and their experimental thermodynamic signatures. C1 Univ Barcelona, Dept Estruct & Constituents Mat, E-08028 Barcelona, Spain. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24060 USA. Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. RP Univ Barcelona, Dept Estruct & Constituents Mat, Diagonal 647, E-08028 Barcelona, Spain. RI DeGraef, Marc/G-5827-2010; Planes, Antoni/O-1904-2015; OI DeGraef, Marc/0000-0002-4721-6226; Planes, Antoni/0000-0001-5213-5714; Porta Tena, Marcel/0000-0001-7582-9671 NR 22 TC 36 Z9 36 U1 4 U2 18 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 197203 DI 10.1103/PhysRevLett.92.197203 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900054 PM 15169443 ER PT J AU Schofield, MA Beleggia, M Zhu, YM Guth, K Jooss, C AF Schofield, MA Beleggia, M Zhu, YM Guth, K Jooss, C TI Direct evidence for negative grain boundary potential in Ca-doped and undoped YBa2Cu3O7-x SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS AB Using electron holography in a transmission electron microscope, we obtained direct evidence for the reduction of negative charge at grain boundary dislocations in Ca-doped YBa2Cu3O7 (YBCO) when compared to undoped YBCO. Because of the finite width of the valence band in the superconducting CuO2 planes, the negative grain boundary charge can lead to a depletion of electron holes available for superconductivity. A significant reduction in the size of the perturbed region in the Ca-doped samples appears to be the principal mechanism for the improved interfacial superconductivity. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Gottingen, D-37073 Gottingen, Germany. RP Brookhaven Natl Lab, Upton, NY 11973 USA. EM schofield@bnl.gov OI Beleggia, Marco/0000-0002-2888-1888 NR 21 TC 40 Z9 40 U1 0 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 195502 DI 10.1103/PhysRevLett.92.195502 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900025 PM 15169414 ER PT J AU Weber, V Niklasson, AMN Challacombe, M AF Weber, V Niklasson, AMN Challacombe, M TI Ab initio linear scaling response theory: Electric polarizability by perturbed projection SO PHYSICAL REVIEW LETTERS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; NONLINEAR OPTICAL-PROPERTIES; HARTREE-FOCK; MATRIX; PURIFICATION; IMPLEMENTATION; COMPUTATION; CONSTANTS; MOLECULES AB A linear scaling method for calculation of the static ab initio response within self-consistent field theory is developed and applied to the calculation of the static electric polarizability. The method is based on the density matrix perturbation theory [Niklasson and Challacombe, preceding Letter, Phys. Rev. Lett. 92, 193001 (2004)], obtaining response functions directly via a perturbative approach to spectral projection. The accuracy and efficiency of the linear scaling method is demonstrated for a series of three-dimensional water clusters at the RHF/6-31G** level of theory. The locality of the response under a global electric field perturbation is numerically demonstrated by the approximate exponential decay of derivative density matrix elements. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Fribourg, Dept Chem, CH-1700 Fribourg, Switzerland. RP Weber, V (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM vweber@t12.lanl.gov NR 43 TC 42 Z9 42 U1 1 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 14 PY 2004 VL 92 IS 19 AR 193002 DI 10.1103/PhysRevLett.92.193002 PG 4 WC Physics, Multidisciplinary SC Physics GA 822LG UT WOS:000221540900010 PM 15169399 ER PT J AU McGraw, R AF McGraw, R TI Humidity, ice, and nitric acid SO SCIENCE LA English DT Letter C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. RP McGraw, R (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. EM rlm@bnl.gov NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD MAY 14 PY 2004 VL 304 IS 5673 BP 961 EP 961 DI 10.1126/science.304.5673.961 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 820IV UT WOS:000221383300024 PM 15143262 ER PT J AU Wernet, P Nordlund, D Bergmann, U Cavalleri, M Odelius, M Ogasawara, H Naslund, LA Hirsch, TK Ojamae, L Glatzel, P Pettersson, LGM Nilsson, A AF Wernet, P Nordlund, D Bergmann, U Cavalleri, M Odelius, M Ogasawara, H Naslund, LA Hirsch, TK Ojamae, L Glatzel, P Pettersson, LGM Nilsson, A TI The structure of the first coordination shell in liquid water SO SCIENCE LA English DT Article ID HYDROGEN-BOND DYNAMICS; SCATTERING EXPERIMENTS; MOLECULAR-DYNAMICS; SPECTROSCOPY; SIMULATION; ICE; SURFACE AB X-ray absorption spectroscopy and x-ray Raman scattering were used to probe the molecular arrangement in the first coordination shell of liquid water. The local structure is characterized by comparison with bulk and surface of ordinary hexagonal ice Ih and with calculated spectra. Most molecules in liquid water are in two hydrogen-bonded configurations with one strong donor and one strong acceptor hydrogen bond in contrast to the four hydrogen-bonded tetrahedral structure in ice. Upon heating from 25degreesC to 90degreesC, 5 to 10% of the molecules change from tetrahedral environments to two hydrogen-bonded configurations. Our findings are consistent with neutron and x-ray diffraction data, and combining the results sets a strong limit for possible local structure distributions in liquid water. Serious discrepancies with structures based on current molecular dynamics simulations are observed. C1 Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. BESSY, D-12489 Berlin, Germany. Stockholm Univ, FYSIKUM, S-10691 Stockholm, Sweden. Stockholm Univ, Dept Chem Phys, S-10691 Stockholm, Sweden. Linkoping Univ, Dept Chem, S-58183 Linkoping, Sweden. Univ Utrecht, Debye Inst, Dept Inorgan Chem & Catalysis, NL-3584 CA Utrecht, Netherlands. RP Nilsson, A (reprint author), Stanford Synchrotron Radiat Lab, POB 20450, Stanford, CA 94309 USA. EM nilsson@slac.stanford.edu RI Ogasawara, Hirohito/D-2105-2009; Cavalleri, Matteo/A-7689-2008; Nordlund, Dennis/A-8902-2008; Nilsson, Anders/E-1943-2011; Pettersson, Lars/F-8428-2011; Glatzel, Pieter/E-9958-2010; Wernet, Philippe/A-7085-2013; ID, BioCAT/D-2459-2012; Pettersson, Lars/J-4925-2013; Odelius, Michael/A-7628-2014; Institute (DINS), Debye/G-7730-2014; Ojamae, Lars/C-4974-2015 OI Ogasawara, Hirohito/0000-0001-5338-1079; Nordlund, Dennis/0000-0001-9524-6908; Nilsson, Anders/0000-0003-1968-8696; Glatzel, Pieter/0000-0001-6532-8144; Wernet, Philippe/0000-0001-7011-9072; Pettersson, Lars/0000-0003-1133-9934; Odelius, Michael/0000-0002-7023-2486; Ojamae, Lars/0000-0002-5341-2637 FU NCRR NIH HHS [RR-08630] NR 25 TC 818 Z9 831 U1 35 U2 308 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD MAY 14 PY 2004 VL 304 IS 5673 BP 995 EP 999 DI 10.1126/science.1096205 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 820IV UT WOS:000221383300044 PM 15060287 ER PT J AU Zhan, CG Spencer, PS Dixon, DA AF Zhan, CG Spencer, PS Dixon, DA TI Chromogenic and neurotoxic effects of an aliphatic gamma-diketone: Computational insights into the molecular structures and mechanism SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID DENSITY-FUNCTIONAL THEORY; HYDRATION FREE-ENERGY; INTEGRAL-EQUATION FORMALISM; POLARIZABLE CONTINUUM MODEL; VACUUM-ULTRAVIOLET REGION; REACTION FIELD-THEORY; CONFIGURATION-INTERACTION; REACTION PATHWAYS; AB-INITIO; THEORETICAL DETERMINATION AB First-principles electronic structure calculations have been performed to predict chromogenic properties of various candidate structures, including pyrrole monomers and dimers and their derivatives, of the chromophores formed from the reactions of 2,5-hexanedione (2,5-HD), a prototype of neurotoxic aliphatic gamma-diketones, with NH3, amino acids, and proteins. The calculated results indicate that the pyrrole monomer structures and a previously proposed dimer structure do not have an absorption in the visible region (lambda > similar to400 nm and < similar to 700 nm), whereas a novel type of pyrrole dimer structure has absorptions (lambda = similar to 400 to 420 nm) in the visible region if the methyl (CH3) groups on the pyrrole rings are oxidized to CHO groups. The calculated results for the oxidized pyrrole dimer models for cross-linked proteins are consistent with all of the available experimental data for the chromogenic and neurotoxic effects of 2,5-HD. Our results strongly support the conclusion that the chromogenic effects of aliphatic gamma-diketones are closely related to their neurotoxic effects and further predict that both the chromogenic and neurotoxic effects are associated with the same chemical reaction process. Such a reaction process most likely starts from the formation of the pyrrole-protein adducts followed by dimerization and further oxidization. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. Univ Kentucky, Coll Pharm, Div Phamaceut Sci, Lexington, KY 40536 USA. Oregon Hlth & Sci Univ, Ctr Res Occupat & Environm Toxicol, Portland, OR 97201 USA. RP Dixon, DA (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Mailstop K9-90,POB 999, Richland, WA 99352 USA. EM zhan@uky.edu NR 71 TC 16 Z9 16 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD MAY 13 PY 2004 VL 108 IS 19 BP 6098 EP 6104 DI 10.1021/jp0312868 PG 7 WC Chemistry, Physical SC Chemistry GA 819GO UT WOS:000221303100032 ER PT J AU Eubank, S Guclu, H Kumar, VSA Marathe, MV Srinivasan, A Toroczkai, Z Wang, N AF Eubank, S Guclu, H Kumar, VSA Marathe, MV Srinivasan, A Toroczkai, Z Wang, N TI Modelling disease outbreaks in realistic urban social networks SO NATURE LA English DT Article ID COMPLEX NETWORKS; SMALLPOX; ATTACK; TRANSMISSION; VACCINATION; SPREAD AB Most mathematical models for the spread of disease use differential equations based on uniformmixing assumptions(1) or ad hoc models for the contact process(2-4). Here we explore the use of dynamic bipartite graphs to model the physical contact patterns that result from movements of individuals between specific locations. The graphs are generated by large-scale individual-based urban traffic simulations built on actual census, land-use and population-mobility data. We find that the contact network among people is a strongly connected small-world-like(5) graph with a well-defined scale for the degree distribution. However, the locations graph is scale-free(6), which allows highly efficient outbreak detection by placing sensors in the hubs of the locations network. Within this large-scale simulation framework, we then analyse the relative merits of several proposed mitigation strategies for smallpox spread. Our results suggest that outbreaks can be contained by a strategy of targeted vaccination combined with early detection without resorting to mass vaccination of a population. C1 Los Alamos Natl Lab, Basic & Appl Simulat Sci Grp, Los Alamos, NM 87545 USA. Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA. Univ Maryland, Dept Comp Sci, College Pk, MD 20742 USA. Univ Maryland, Inst Adv Comp Studies, College Pk, MD 20742 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Complex Syst Grp, Los Alamos, NM 87545 USA. Univ Maryland, Dept Comp Sci, College Pk, MD 20742 USA. RP Los Alamos Natl Lab, Basic & Appl Simulat Sci Grp, MS M997, Los Alamos, NM 87545 USA. EM eubank@lanl.gov RI Toroczkai, Zoltan/A-3421-2008; Eubank, Stephen/D-7497-2011 OI Toroczkai, Zoltan/0000-0002-6602-2849; Eubank, Stephen/0000-0002-7177-309X NR 28 TC 723 Z9 763 U1 20 U2 141 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 EI 1476-4687 J9 NATURE JI Nature PD MAY 13 PY 2004 VL 429 IS 6988 BP 180 EP 184 DI 10.1038/nature02541 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 819ZU UT WOS:000221356300041 PM 15141212 ER PT J AU Wiedemann, SH Bergman, RG Eman, JA AF Wiedemann, SH Bergman, RG Eman, JA TI Rhodium-catalyzed direct C-H addition of 4,4-dimethyl-2-oxazoline to alkenes SO ORGANIC LETTERS LA English DT Article ID N-HETEROCYCLIC CARBENES; METHYL-FORMATE; SYNTHETIC UTILITY; BOND ACTIVATION; HYDROESTERIFICATION; COMPLEXES; ETHYLENE; SYSTEM; HYDROXYCARBONYLATION; 2-OXAZOLINES AB A new method for the preparation of 2-substituted oxazolines by rhodium-catalyzed coupling of alkenes with 4,4-dimethyl-2-oxazoline is reported. The oxazoline products are obtained in good yield with excellent selectivity for the linear product. A variety of alkene substitution patterns and functional groups are tolerated. This procedure represents an attractive alternative to hydroesterification because it does not involve the manipulation of CO gas. C1 Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Bergman, RG (reprint author), Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA. EM bergman@cchem.berkeley.edu FU NIGMS NIH HHS [GM069559] NR 35 TC 40 Z9 40 U1 2 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1523-7060 EI 1523-7052 J9 ORG LETT JI Org. Lett. PD MAY 13 PY 2004 VL 6 IS 10 BP 1685 EP 1687 DI 10.1021/ol049417q PG 3 WC Chemistry, Organic SC Chemistry GA 818XT UT WOS:000221278500042 PM 15128267 ER PT J AU Lo, CT Seifert, S Thiyagarajan, P Narasimhan, B AF Lo, CT Seifert, S Thiyagarajan, P Narasimhan, B TI Phase behavior of semicrystalline polymer blends SO POLYMER LA English DT Article DE semicrystalline polymers; SAXS; phase behavior ID LOW-DENSITY POLYETHYLENE; MULTICOMPONENT POLYOLEFIN BLENDS; POLYPROPYLENE BLENDS; MECHANICAL-PROPERTIES; ISOTHERMAL CRYSTALLIZATION; THERMODYNAMIC INTERACTIONS; TEMPERATURE-DEPENDENCE; INTERACTION PARAMETER; RANDOM COPOLYMERS; MISCIBILITY AB The phase behavior of the semicrystalline polymer blend composed of isotactic polypropylene (iPP) and linear low density polyethylene (PE) was studied using small angle X-ray scattering (SAXS) and optical microscopy (OM). Based on the random phase approximation, the iPP/PE interaction parameter, chi was obtained, and used to construct the iPP/PE phase diagram. The chi values reported in this study are lower than the chi values for deuterium-labeled moieties, measured by small angle neutron scattering (SANS). The predicted phase diagram has upper critical solution temperature (UCST) behavior with a critical temperature of 143 degreesC for the molecular weights used in this study. OM was used to locate cloud points and the results are consistent with the predicted phase diagram. Since iPP melts above the critical point, care was taken to distinguish phase separation front iPP crystallization by studying the kinetics of iPP crystallization, and the iPP crystallization was discerned from dewetting. In PE-rich blends, the iPP crystallization was suppressed and no dewetting was observed. (C) 2004 Published by Elsevier Ltd. C1 Iowa State Univ, Dept Chem Engn, Ames, IA 50011 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Narasimhan, B (reprint author), Iowa State Univ, Dept Chem Engn, 2035 Sweeney Hall, Ames, IA 50011 USA. EM nbalaji@iastate.edu RI Narasimhan, Balaji/A-5487-2008 OI Narasimhan, Balaji/0000-0002-7955-5353 NR 42 TC 12 Z9 13 U1 2 U2 11 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAY 13 PY 2004 VL 45 IS 11 BP 3671 EP 3679 DI 10.1016/j.polymer.2004.03.089 PG 9 WC Polymer Science SC Polymer Science GA 821TT UT WOS:000221486300012 ER PT J AU Gee, RH Maxwell, RS Balazs, B AF Gee, RH Maxwell, RS Balazs, B TI Molecular dynamics studies on the effects of water speciation on interfacial structure and dynamics in silica-filled PDMS composites SO POLYMER LA English DT Article; Proceedings Paper CT Symposium on Coupling Simulations and Experiments in Polymer Science CY MAY 15-17, 2003 CL Univ Utah, Salt Lake City, UT HO Univ Utah DE polydimethylsiloxane; molecular dynamics; interfacial dynamics ID RESIDUAL DIPOLAR COUPLINGS; DOUBLE-QUANTUM NMR; SMALL-PENETRANT DIFFUSION; CROSS-LINKED ELASTOMERS; CONFORMATIONAL DYNAMICS; FORCE-FIELDS; SIMULATION; SPECTROSCOPY; POLYMERS; POLYETHYLENE AB The effect of chemisorbed and physisorbed water on the interfacial structure and dynamics in silica-filled polydimethylsiloxane (PDMS) based composites have been investigated. Toward this end, we have combined molecular dynamics simulations and experimental studies employing dynamic mechanical analysis and nuclear magnetic resonance analysis. Our results suggest that the polymer-silica contact distance and the mobility of interfacial polymer chains significantly decreased as the hydration level at the interface was reduced. The reduced mobility of the PDMS chains in the interfacial domain reduced the overall, bulk, motional properties of the polymer, thus causing an effective 'stiffening' of the polymer matrix. The role of the long-ranged Coulombic interactions on the structural features and chain dynamics of the polymer were also examined. Both are found to be strongly influenced by the electrostatic interactions as identified by the bond orientation time correlation function, local density distribution and radial distribution functions. These results have important implications for the design and life performance behavior of nanocomposite silica-siloxane materials. (C) 2004 Elsevier Ltd. All rights reserved. C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Gee, RH (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, POB 5508, Livermore, CA 94550 USA. EM gee10@llnl.gov NR 36 TC 35 Z9 35 U1 4 U2 20 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAY 13 PY 2004 VL 45 IS 11 BP 3885 EP 3891 DI 10.1016/j.polymer.2004.01.078 PG 7 WC Polymer Science SC Polymer Science GA 821TT UT WOS:000221486300036 ER PT J AU Budzien, J McCoy, JD Rottach, D Curro, JG AF Budzien, J McCoy, JD Rottach, D Curro, JG TI Effects of chain stiffness and penetrant size on penetrant diffusion in simple polymers: deduced relations from simulation and PRISM theory SO POLYMER LA English DT Article; Proceedings Paper CT Symposium on Coupling Simulations and Experiments in Polymer Science CY MAY 15-17, 2003 CL Univ Utah, Salt Lake City, UT HO Univ Utah DE penetrant; PRISM theory; Stokes-Einstein relation ID MOLECULAR-DYNAMICS SIMULATION; HARD-SPHERE THEORY; FREE-VOLUME; POSITRON-ANNIHILATION; SELF-DIFFUSION; GAS-DIFFUSION; REAL FLUIDS; LIQUIDS; COEFFICIENTS; ALKANES AB Molecular dynamics simulations in the NVT ensemble were performed for a repulsive system of bead-spring polymer chains with angle constraints. The diffusion coefficients of spherical penetrants were measured for different size penetrants as the angle constraints were varied. The scaling of the diffusion coefficient with penetrant size varies as a function of chain stiffness from liquid-like behavior to polymeric behavior. Free volume distributions were calculated from both simulation and PRISM theory. It is found that free volume distributions and mean void size are constant with chain stiffness although the diffusion coefficient changes by a factor of two. This suggests that while free volume is necessary for diffusion to occur, binary collisions and chain relaxation also play a role in determining penetrant diffusion. The relative contributions of these factors to the diffusion coefficient may change as a function of chain stiffness. (C) 2004 Elsevier Ltd. All rights reserved. C1 New Mexico Inst Min & Technol, Dept Mat & Met Engn, Socorro, NM 87801 USA. Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP McCoy, JD (reprint author), New Mexico Inst Min & Technol, Dept Mat & Met Engn, Socorro, NM 87801 USA. EM mccoy@mailhost.nmt.edu RI McCoy, John/B-3846-2010; Budzien, Joanne/E-8315-2011; Rottach, Dana/E-8350-2010 OI McCoy, John/0000-0001-5404-1404; Rottach, Dana/0000-0003-0459-5980 NR 45 TC 11 Z9 11 U1 1 U2 13 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAY 13 PY 2004 VL 45 IS 11 BP 3923 EP 3932 DI 10.1016/j.polymer.2003.12.084 PG 10 WC Polymer Science SC Polymer Science GA 821TT UT WOS:000221486300041 ER PT J AU Prettyman, TH Feldman, WC Mellon, MT McKinney, GW Boynton, WV Karunatillake, S Lawrence, DJ Maurice, S Metzger, AE Murphy, JR Squyres, SW Starr, RD Tokar, RL AF Prettyman, TH Feldman, WC Mellon, MT McKinney, GW Boynton, WV Karunatillake, S Lawrence, DJ Maurice, S Metzger, AE Murphy, JR Squyres, SW Starr, RD Tokar, RL TI Composition and structure of the Martian surface at high southern latitudes from neutron spectroscopy SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article DE Mars; polar processes; surface composition ID GENERAL-CIRCULATION MODEL; POLAR LAYERED DEPOSITS; X-RAY SPECTROMETER; MARS ODYSSEY; CARBON-DIOXIDE; GROUND ICE; PATHFINDER SITE; LANDING SITES; WATER-VAPOR; CO2 FROST AB Neutron spectroscopy data acquired by Mars Odyssey are analyzed to determine the abundance and depth of near-surface water ice as a function of latitude in the southern hemisphere as well as the inventory of CO2 in the south polar residual cap. The surface is modeled as a semi-infinite, water-rich permafrost layer covered by desiccated material, which is consistent with theoretical models of ground ice stability. Latitude-dependent parameters, water abundance and depth, are determined from zonally averaged neutron counting data. Spatial mixing of the output of neutrons from regions within the footprint of the spectrometer is modeled, and asymmetrical features such as the residual cap are included in the analysis. Absorption of thermal neutrons by major elements other than hydrogen is found to have a significant influence on the determination of water abundance. Poleward of -60degrees, the water-rich layer contains 60% +/- 10% water by weight (70% to 85% by volume) and is covered by less than 15 g/cm(2) +/- 5 g/cm(2) of dry material. The volume fraction of water is generally higher than can be accommodated in the pore space of surface soils, which implies that water vapor diffusion processes alone cannot explain the observations. Alternatives for the formation of the water-rich layer are discussed. Results of our analysis of the residual-cap CO2 inventory support conclusions that the atmosphere is not buffered by a larger reservoir of surface CO2 at the poles and that Mars' total CO2 inventory is well represented by the present atmospheric mass. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA. Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Observ Midi Pyrenees, Ctr Etud Spatiale Rayonnements, F-31400 Toulouse, France. CALTECH, Jet Prop Lab, Pasadena, CA USA. New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. Catholic Univ Amer, Dept Phys, Washington, DC 20017 USA. RP Los Alamos Natl Lab, Mail Stop D466, Los Alamos, NM 87545 USA. EM thp@lanl.gov; wfeldman@lanl.gov; mellon@argyre.colorado.edu; gwm@lanl.gov; wboynton@lpl.arizona.edu; wk43@cornell.edu; djlawrence@lanl.gov; sylvestre.maurice@cesr.fr; aem@eros.jpl.nasa.gov; murphy@nmsu.edu; squyres@astrosun.tn.cornell.edu; rstarr@lepvax.gsfc.nasa.gov; rlt@lanl.gov RI Karunatillake, Suniti/A-5934-2009; Mellon, Michael/C-3456-2016; Lawrence, David/E-7463-2015; OI Karunatillake, Suniti/0000-0001-9891-1432; Lawrence, David/0000-0002-7696-6667; Prettyman, Thomas/0000-0003-0072-2831 NR 75 TC 69 Z9 69 U1 1 U2 12 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9097 EI 2169-9100 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD MAY 12 PY 2004 VL 109 IS E5 AR E05001 DI 10.1029/2003JE002139 PG 28 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 821PQ UT WOS:000221474700001 ER PT J AU Kang, JS Wi, SC Kim, JH McEwen, KA Olson, CG Shim, JH Min, BI AF Kang, JS Wi, SC Kim, JH McEwen, KA Olson, CG Shim, JH Min, BI TI Electronic structures of UTSn (T = Ni, Pd) using photoemission spectroscopy SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID METALLIC MAGNET UNISN; UPDSN; SUSCEPTIBILITY; QUADRUPOLAR; TRANSITION; SPECTRA; MOMENTS; ORIGIN; UBE13; HEAT AB Electronic structures of UTSn (T = Ni, Pd) have been investigated using photoemission spectroscopy (PES). The extracted U 5f PES spectra of UTSn (T = Ni, Pd) exhibit a broad peak centred at similar to0.3 eV below E(F) with rather small spectral weight near E(F)(N(f)(E(F))). The small N(f)(E(F)) in UTSn is found to be correlated with the T d PES spectra that have a very low density of states (DOS) near EF. The temperature-dependent high-resolution PES spectra of UTSn provide evidence for the V-shaped reduced metallic DOS near EF, but they reveal no appreciable changes in their electronic structures across the magnetic phase transition temperatures. Comparison of the measured PES spectra to the LSDA + U band structure calculation shows reasonably good agreement for UPdSn, but not for UNiSn. Therefore, in contrast to the general consensus of the localized U 5f electrons in UTSn (T = Ni, Pd), our finding supports a rather itinerant nature of U 5f electrons for UPdSn, but not for UNiSn. C1 Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea. UCL, Dept Phys & Astron, London WC1E 6BT, England. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea. RP Kang, JS (reprint author), Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea. RI Shim, Ji Hoon/F-5375-2013 NR 43 TC 4 Z9 4 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD MAY 12 PY 2004 VL 16 IS 18 BP 3257 EP 3269 DI 10.1088/0953-8984/16/18/025 PG 13 WC Physics, Condensed Matter SC Physics GA 854WM UT WOS:000223934400028 ER PT J AU Kennedy, BJ Li, LQ Lee, Y Vogt, T AF Kennedy, BJ Li, LQ Lee, Y Vogt, T TI Pressure induced valence and structural phase transition in Ba2PrRu0.8Ir0.2O6 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID MAGNETIC-PROPERTIES; DOUBLE PEROVSKITES; YBINCU4 AB The crystal structure of the ordered double perovskite Ba2PrRu0.8Ir0.2O6 was investigated as a function of pressure at room temperature. High-resolution synchrotron powder diffraction measurements have revealed the occurrence of a first order phase transition at a critical pressure of about 0.5 GPa. Structural refinements indicate that Ba2PrRu0.8Ir0.2O6 transforms from an ambient pressure monoclinic (P2(1)/n) to a high-pressure tetragonal (P4/mnc) structure. The transition is consistent with a valence change of the Pr ions. C1 Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Kennedy, BJ (reprint author), Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia. RI Vogt, Thomas /A-1562-2011; Lee, Yongjae/K-6566-2016; OI Vogt, Thomas /0000-0002-4731-2787; Kennedy, Brendan/0000-0002-7187-4579 NR 29 TC 15 Z9 15 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD MAY 12 PY 2004 VL 16 IS 18 BP 3295 EP 3301 DI 10.1088/0953-8984/16/18/029 PG 7 WC Physics, Condensed Matter SC Physics GA 854WM UT WOS:000223934400032 ER PT J AU Funk, T Kennepohl, P Di Bilio, AJ Wehbi, WA Young, AT Friedrich, S Arenholz, E Gray, HB Cramer, SP AF Funk, T Kennepohl, P Di Bilio, AJ Wehbi, WA Young, AT Friedrich, S Arenholz, E Gray, HB Cramer, SP TI X-ray magnetic circular dichroism of Pseudomonas aeruginosa nickel(II) azurin SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID BLUE COPPER SITE; ELECTRONIC-STRUCTURE; ABSORPTION-SPECTRA; CRYSTAL-STRUCTURE; HIGH-SPIN; PARAMAGNETIC-RESONANCE; EPR SPECTROSCOPY; MODEL COMPOUNDS; AXIAL LIGANDS; METAL AB We show that X-ray magnetic circular dichroism (XMCD) can be employed to probe the oxidation states and other electronic structural features of nickel active sites in proteins. As a calibration standard, we have measured XMCD and X-ray absorption (XAS) spectra for the nickel(II) derivative of Pseudomonas aeruginosa azurin (NiAz). Our analysis of these spectra confirms that the electronic ground state of NiAz is high-spin (S = 1); we also find that the L-3-centroid energy is 853.1 (1) eV, the branching ratio is 0.722(4), and the magnetic moment is 1.9(4) mu(B). Density functional theory (DFT) calculations on model NiAz structures establish that orbitals 3d(x2-y2) and 3d(z2) are the two valence holes in the high-spin Ni(II) ground state, and in accord with the experimentally determined orbital magnetic moment, the DFT results also demonstrate that both holes are highly delocalized, with 3d(x2-y2) having much greater ligand character. C1 LBNL, Phys Biosci, Pasadena, CA 91125 USA. CALTECH, Beckman Inst, Pasadena, CA 91125 USA. LBNL, Adv Light Source, Berkeley, CA 94720 USA. LLNL, Adv Detector Grp, Livermore, CA 94550 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Funk, T (reprint author), LBNL, Phys Biosci, Cyclotron Rd 1, Pasadena, CA 91125 USA. EM funk@lbl.gov; hbgray@caltech.edu; SPCramer@ucdavis.edu RI Kennepohl, Pierre/B-2096-2009 OI Kennepohl, Pierre/0000-0003-3408-9157 FU NIDDK NIH HHS [DK19038]; NIGMS NIH HHS [GM4430] NR 67 TC 9 Z9 9 U1 0 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 12 PY 2004 VL 126 IS 18 BP 5859 EP 5866 DI 10.1021/ja036218d PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA 818TW UT WOS:000221268400035 PM 15125678 ER PT J AU Pozdniakov, S Tsang, CF AF Pozdniakov, S Tsang, CF TI A self-consistent approach for calculating the effective hydraulic conductivity of a binary, heterogeneous medium SO WATER RESOURCES RESEARCH LA English DT Article DE effective hydraulic conductivity; fractured porous medium; heterogeneity; self-consistent approach ID GROUNDWATER-FLOW; PERMEABILITY; CONNECTIVITY; TRANSPORT; BEHAVIOR; NETWORKS; SYSTEM AB In this paper, we consider an approach for estimating the effective hydraulic conductivity of a 3-D medium with a binary distribution of local hydraulic conductivities. The medium heterogeneity is represented by a combination of matrix medium conductivity with spatially distributed sets of inclusions. Estimation of effective conductivity is based on a self-consistent approach introduced by Shvidler [ 1985]. The tensor of effective hydraulic conductivity is calculated numerically by using a simple system of equations for the main diagonal elements. Verification of the method is done by comparison with theoretical results for special cases and numerical results of Desbarats [ 1987] and our own numerical modeling. The method was applied to estimating the effective hydraulic conductivity of a 2-D and 3-D fractured porous medium. The medium heterogeneity is represented by a combination of matrix conductivity and a spatially distributed set of highly conductive fractures. The tensor of effective hydraulic conductivity is calculated for parallel- and random-oriented sets of fractures. The obtained effective conductivity values coincide with Romm's [ 1966] and Snow's [ 1969] theories for infinite fracture length. These values are also physically acceptable for the sparsely fractured medium case with low fracture spatial density and finite fracture length. Verification of the effective hydraulic conductivity obtained for a fractured porous medium is done by comparison with our own numerical modeling for a 3-D case and with Malkovsky and Pek's [ 1995] results for a 2-D case. C1 Moscow MV Lomonosov State Univ, Fac Geol, Moscow 119899, Russia. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Pozdniakov, S (reprint author), Moscow MV Lomonosov State Univ, Fac Geol, Leninskie Gory, Moscow 119899, Russia. EM sppozd@geol.msu.ru; cftsang@lbl.gov RI Pozdniakov, Sergey/J-7154-2012 NR 31 TC 24 Z9 25 U1 1 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY 12 PY 2004 VL 40 IS 5 AR W05105 DI 10.1029/2003WR002617 PG 13 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 821QC UT WOS:000221476100003 ER PT J AU Ye, M Neuman, SP Guadagnini, A Tartakovsky, DM AF Ye, M Neuman, SP Guadagnini, A Tartakovsky, DM TI Nonlocal and localized analyses of conditional mean transient flow in bounded, randomly heterogeneous porous media SO WATER RESOURCES RESEARCH LA English DT Article DE transient flow; uncertainty; heterogeneity; spatial variability; localization; parallel computing ID STEADY-STATE FLOW; LAPLACE TRANSFORM GALERKIN; STREAMLINE UPWIND APPROACH; NUMERICAL INVERSION; MOMENT EQUATIONS; RECURSIVE APPROXIMATIONS; NONIDEAL TRANSPORT; MASS-TRANSPORT; DOMAINS 1; GROUNDWATER AB We consider the numerical prediction of transient flow in bounded, randomly heterogeneous porous media driven by random sources, initial heads, and boundary conditions without resorting to Monte Carlo simulation. After applying the Laplace transform to the governing stochastic flow equations, we derive exact nonlocal (integro-differential) equations for the mean and variance-covariance of transformed head and flux, conditioned on measured values of log conductivity Y = ln K. Approximating these conditional moment equations recursively to second order in the standard deviation sigma(Y) of Y, we solve them by finite elements for superimposed mean-uniform and convergent flows in a two-dimensional domain. An alternative conditional mean solution is obtained through localization of the exact moment expressions. The nonlocal and localized solutions are obtained using a highly efficient parallel algorithm and inverted numerically back into the time domain. A comparison with Monte Carlo simulations demonstrates that the moment solutions are remarkably accurate for strongly heterogeneous media with sigma(Y)(2) as large as 4. The nonlocal solution is only slightly more accurate than the much simpler localized solution, but the latter does not yield information about predictive uncertainty. The accuracy of each solution improves markedly with conditioning. A preliminary comparison of computational efficiency suggests that both the nonlocal and localized solutions for mean head and its variance require significantly less computer time than is required for Monte Carlo statistics to stabilize when the same direct matrix solver is used for all three ( we do not presently know how using iterative solvers would have affected this conclusion). This is true whether the Laplace inversion and Monte Carlo simulations are conducted sequentially or in parallel on multiple processors and regardless of problem size. The underlying exact and recursive moment equations, as well as the proposed computational algorithm, are valid in both two and three dimensions; only the numerical implementation of our algorithm is two-dimensional. C1 Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA. Politecn Milan, Dipartimento Ingn Idraul Ambientale & Rilevamento, I-20133 Milan, Italy. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Ye, M (reprint author), Pacific NW Natl Lab, Richland, WA USA. EM neuman@hwr.arizona.edu; alberto.guadagnini@polimi.it; dmt@lanl.gov RI Ye, Ming/A-5964-2008; Tartakovsky, Daniel/E-7694-2013 NR 36 TC 28 Z9 28 U1 2 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD MAY 12 PY 2004 VL 40 IS 5 AR W05104 DI 10.1029/2003WR002099 PG 20 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 821QC UT WOS:000221476100001 ER PT J AU Lian, R Crowell, RA Shkrob, IA Bartels, DM Oulianov, DA Gosztola, D AF Lian, R Crowell, RA Shkrob, IA Bartels, DM Oulianov, DA Gosztola, D TI Recombination of geminate (OH, e(aq)(-)) pairs in concentrated alkaline solutions: lack of evidence for hydroxyl radical deprotonation SO CHEMICAL PHYSICS LETTERS LA English DT Article ID AQUEOUS-SOLUTIONS; PULSE-RADIOLYSIS; TEMPERATURE-DEPENDENCE; HYDRATED ELECTRONS; ABSORPTION-SPECTRA; HYDROGEN-PEROXIDE; LIQUID WATER; DYNAMICS; DECOMPOSITION; DISSOCIATION AB Picosecond dynamics of hydrated electrons and hydroxyl radicals generated in 200 nm photodissociation of aqueous hydroxide and 400 nm (3-photon) ionization of water in concentrated alkaline solutions were obtained. No deprotonation of hydroxyl radicals was observed on the sub-nanosecond time scale, even in 1-10 M KOH solutions. This result is completely at odds with the kinetic data for deprotonation of OH radical in dilute alkaline solutions. We suggest that the deprotonation of hydroxyl radical is slowed down dramatically in concentrated alkaline solutions. (C) 2004 Published by Elsevier B.V. C1 Argonne Natl Lab, Div Chem, Dept Chem, Argonne, IL 60439 USA. RP Crowell, RA (reprint author), Argonne Natl Lab, Div Chem, Dept Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM rob_crowell@anl.gov; bartels@hertz.rad.nd.edu RI Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 NR 35 TC 10 Z9 10 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD MAY 11 PY 2004 VL 389 IS 4-6 BP 379 EP 384 DI 10.1016/j.cplett.2004.03.134 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 819HJ UT WOS:000221305500030 ER PT J AU Luo, SN Akins, JA Ahrens, TJ Asimow, PD AF Luo, SN Akins, JA Ahrens, TJ Asimow, PD TI Shock-compressed MgSiO3 glass, enstatite, olivine, and quartz: Optical emission, temperatures, and melting SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article DE shock temperature; melting; equation of state; pyrometry; silicates; perovskite ID CONSISTENT THERMODYNAMIC DATA; LOWER MANTLE CONDITIONS; HIGH-PRESSURE; GEOPHYSICAL IMPLICATIONS; SILICATE-GLASSES; PEROVSKITE; BOUNDARY; VELOCITY; PHASE; TRANSITION AB Optical emission of MgSiO3 glass, enstatite, olivine, and quartz under shock wave compression was investigated with optical pyrometry at discrete wavelengths ranging from visible to near infrared. We develop a new analysis of optical emission that does not require a gray body assumption. Instead, at each wavelength, the optical linear absorption coefficients (a) and blackbody spectral radiances (L-lambdab) of shocked and unshocked materials were obtained by nonlinear fitting to the time-resolved radiance from the target assembly. The absorption spectra of unshocked samples corresponding to the measured values of a reproduce those from independent static optical spectroscopic measurements. The measured values of a (ranging from 7 to 56 mm(-1)) for shocked samples indicate that shock-induced high-pressure phases (including melt) can be regarded essentially as black bodies in the optical range investigated, although starting phases such as enstatite and olivine have band-like spectra at ambient conditions. The effect of emission from the air gap at the driver sample interface on the recorded radiance can be resolved, but a and L-lambdab cannot be separated for this component of the signal. The shock velocity-particle velocity relationships of these silicates derived from radiance history are in accord with previous investigations using independent techniques. Given the limited amount of shock wave data, possible high-pressure melting curves of Mg-perovskite and its assemblage with periclase are deduced; their melting temperatures near the core-mantle boundary (CMB) being 6000 +/- 500 K and 4000 +/- 300 K, respectively. It is proposed that Mg-perovskite melts with density increase at the CMB pressure. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. CALTECH, Seismol Lab, Lindhurst Lab Expt Geophys, Pasadena, CA 91125 USA. RP Luo, SN (reprint author), Los Alamos Natl Lab, Plasma Phys P-24,MS E526, Los Alamos, NM 87545 USA. EM sluo@lanl.gov RI Asimow, Paul/E-7451-2010; Luo, Sheng-Nian /D-2257-2010 OI Asimow, Paul/0000-0001-6025-8925; Luo, Sheng-Nian /0000-0002-7538-0541 NR 53 TC 31 Z9 33 U1 0 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAY 11 PY 2004 VL 109 IS B5 AR B05205 DI 10.1029/2003JB002860 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 821PS UT WOS:000221474900006 ER PT J AU Ko, BS Babcock, B Jennings, GK Tilden, SG Peterson, RR Cliffel, D Greenbaum, E AF Ko, BS Babcock, B Jennings, GK Tilden, SG Peterson, RR Cliffel, D Greenbaum, E TI Effect of surface composition on the adsorption of photosystem I onto alkanethiolate self-assembled monolayers on gold SO LANGMUIR LA English DT Article ID PHOTOSYNTHETIC REACTION CENTERS; INFRARED-SPECTROSCOPY; HYDROPHOBIC SURFACE; PLASMON RESONANCE; PROTEIN; DETERGENTS; SILVER AB We have used self-assembled monolayers (SAMs) prepared from omega-terminated alkanethiols on gold to generate model surfaces and examine the effect of surface composition on the adsorption of Photosystem I(PSI), stabilizedin aqueous solution by Triton X-100. Triton-stabilized PSI adsorbs to high-energy surfaces prepared from HO- and HO2C-terminated alkanethiols but does not adsorb to low-energy surfaces. The inhibition of PSI adsorption at low-energy surfaces is consistent with the presence of a layer of Triton X-100 that adsorbs atop the hydrophobic SAM and presents a protein-resistant poly(ethylene glycol) (PEG) surface. While the presence of the PEG surface prevents the adsorption of PSI, the displacement of the inhibiting layer of Triton X-100 by dodecanol, a more active surfactant, greatly enhances the adsorption of PSI. This inhibiting effect by Triton X-100 can be extended to other protein systems such as bovine serum albumin. C1 Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA. Vanderbilt Univ, Dept Chem, Nashville, TN 37235 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Jennings, GK (reprint author), Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA. EM kane.g.jennings@vanderbilt.edu; d.cliffel@vanderbilt.edu NR 28 TC 48 Z9 48 U1 4 U2 23 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 11 PY 2004 VL 20 IS 10 BP 4033 EP 4038 DI 10.1021/la0356809 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 819MQ UT WOS:000221319400034 PM 15969395 ER PT J AU Park, NG Kang, MG Kim, KM Ryu, KS Chang, SH Kim, DK van de Lagemaat, J Benkstein, KD Frank, AJ AF Park, NG Kang, MG Kim, KM Ryu, KS Chang, SH Kim, DK van de Lagemaat, J Benkstein, KD Frank, AJ TI Morphological and photoelectrochemical characterization of core-shell nanoparticle films for dye-sensitized solar cells: Zn-O type shell on SnO2 and TiO2 cores SO LANGMUIR LA English DT Article ID RAY-ABSORPTION SPECTROSCOPY; NANOCRYSTALLINE TIO2; ELECTRON-TRANSFER; CONVERSION EFFICIENCY; NANOPOROUS ELECTRODE; POLYMER ELECTROLYTE; PHOTOVOLTAIC CELLS; OXIDE ELECTRODES; ZINC-OXIDE; THIN-LAYER AB Core-shell type nanoparticles with SnO2 and TiO2 cores and zinc oxide shells were prepared and characterized by surface sensitive techniques. The influence of the structure of the ZnO shell and the morphology of nanoparticle films on the performance was evaluated. X-ray absorption near-edge structure and extended X-ray absorption fine structure studies show the presence of thin ZnO-like shells around the nanoparticles at low Zn levels. In the case of SnO2 cores, ZnO nanocrystals are formed at high Zn/Sn ratios (ca. 0.5). Scanning electron microscopy studies show that Zn modification of SnO2 nanoparticles changes the film morphology from a compact mesoporous structure to a less dense macroporous structure. In contrast, Zn modification of TiO2 nanoparticles has no apparent influence on film morphology. For SnO2 cores, adding ZnO improves the solar cell efficiency by increasing light scattering and dye uptake and decreasing recombination. In contrast, adding a ZnO shell to the TiO2 core decreases the cell efficiency, largely owing to a loss of photocurrent resulting from slow electron transport associated with the buildup of the ZnO surface layer. C1 ETRI, Basic Res Lab, Taejon 305350, South Korea. Kyungpook Natl Univ, Dept Chem, Taegu 702701, South Korea. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Park, NG (reprint author), ETRI, Basic Res Lab, Taejon 305350, South Korea. RI van de Lagemaat, Jao/J-9431-2012; Park, Nam-Gyu/F-2477-2014; OI Kim, Kwang Man/0000-0002-4016-7265 NR 54 TC 127 Z9 127 U1 3 U2 58 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 11 PY 2004 VL 20 IS 10 BP 4246 EP 4253 DI 10.1021/la036122x PG 8 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 819MQ UT WOS:000221319400063 PM 15969424 ER PT J AU Luo, J Maye, MM Han, L Kariuki, NN Jones, VW Lin, YH Engelhard, MH Zhong, CJ AF Luo, J Maye, MM Han, L Kariuki, NN Jones, VW Lin, YH Engelhard, MH Zhong, CJ TI Spectroscopic characterizations of molecularly linked gold nanoparticle assemblies upon thermal treatment SO LANGMUIR LA English DT Article ID CLUSTER MOLECULES; OPTICAL-PROPERTIES; CARBON-MONOXIDE; CO OXIDATION; THIN-FILMS; FUEL-CELLS; CATALYSTS; ACTIVATION; SIZE; HYDROGENATION AB The understanding of surface properties of core-shell type nanoparticles is important for exploiting the unique nanostructured catalytic properties. We report herein findings of a spectroscopic investigation of the thermal treatment of such nanoparticle assemblies. We have studied assemblies of gold nanocrystals of similar to2 nm core sizes that are capped by alkanethiolate shells and are assembled by covalent or hydrogen-bonding linkages on a substrate as a model system. The structural evolution of the nanoparticle assemblies treated at different temperatures was probed by several spectroscopic techniques, including UV-visible, Fourier transform infrared (FTIR), and X-ray photoelectron spectroscopy (XPS). The results show that the capping/linking shell molecules can be effectively removed to produce controllable surface and optical properties. The data further revealed that the thermally induced evolution of the surface plasmon resonance property of gold nanoparticles is dependent on the chemical nature of the linker molecule. The spectral evolution is discussed in terms of changes in particle size, interparticle distance, and dielectric medium properties, which has important implications for controlled preparation and thermal processing of core-shell nanostructured metal catalysts. C1 SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA. 3M Co, Analyt Technol Ctr, 3M Ctr, St Paul, MN 55144 USA. Pacific NW Natl Lab, Environm & Mol Sci Lab, Richland, WA 99352 USA. RP Zhong, CJ (reprint author), SUNY Binghamton, Dept Chem, Binghamton, NY 13902 USA. RI Engelhard, Mark/F-1317-2010; Lin, Yuehe/D-9762-2011; Zhong, Chuan-Jian/D-3394-2013; OI Lin, Yuehe/0000-0003-3791-7587; Engelhard, Mark/0000-0002-5543-0812 NR 47 TC 32 Z9 32 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 11 PY 2004 VL 20 IS 10 BP 4254 EP 4260 DI 10.1021/la036163t PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 819MQ UT WOS:000221319400064 PM 15969425 ER PT J AU Loncaric, J Tsynkov, SV AF Loncaric, J Tsynkov, SV TI Optimization of power in the problems of active control of sound SO MATHEMATICS AND COMPUTERS IN SIMULATION LA English DT Article; Proceedings Paper CT Workshop on Wave Phenomena in Physics and Engineering CY MAY, 2003 CL Montreal, CANADA DE noise cancellation; active control sources; volumetric and surface controls; general solution; monopoles and dipoles; radiation of waves; complex-valued quantities; load on the sources by the field; net power gain ID NOISE AB We analyze the problem of suppressing the unwanted component of a time-harmonic acoustic field (noise) on a predetermined region of interest. The suppression is rendered by active means, i.e., by introducing the additional acoustic sources called controls that generate the appropriate anti-sound. Previously, we have obtained general solutions for active controls in both continuous and discrete formulation of the problem. We have also obtained optimal solutions that minimize the L-1 or L-2 norm of the control sources; the physical interpretation of the former being the overall absolute acoustic source strength. In the current paper, we minimize the power required for the operation of the active control system. It turns out that the corresponding analysis necessarily involves interaction between the sources of sound and the surrounding acoustic field, which was not the case for either L-1 or L-2. Even though it may first seem counterintuitive, one can build a control system (a particular combination of surface monopoles and dipoles) that would require no power input for operation and would even produce a net power gain while providing the exact noise cancellation. This usually comes at the expense of having the original sources of noise produce even more energy. (C) 2004 IMACS. Published by Elsevier B.V. All rights reserved. C1 N Carolina State Univ, Dept Math, Raleigh, NC 27695 USA. N Carolina State Univ, CRSC, Raleigh, NC 27695 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Loncaric, J (reprint author), N Carolina State Univ, Dept Math, Box 8205, Raleigh, NC 27695 USA. EM josip@lanl.gov; tsynkov@math.ncsu.edu NR 12 TC 15 Z9 16 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4754 J9 MATH COMPUT SIMULAT JI Math. Comput. Simul. PD MAY 11 PY 2004 VL 65 IS 4-5 BP 323 EP 335 DI 10.1016/j.matcom.2004.01.005 PG 13 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 823GP UT WOS:000221598400003 ER PT J AU Dutta, S Glimm, J Grove, JW Sharp, DH Zhang, YM AF Dutta, S Glimm, J Grove, JW Sharp, DH Zhang, YM TI Spherical Richtmyer-Meshkov instability for axisymmetric flow SO MATHEMATICS AND COMPUTERS IN SIMULATION LA English DT Article; Proceedings Paper CT Workshop on Wave Phenomena in Physics and Engineering CY MAY, 2003 CL Montreal, CANADA DE spherical geometry; Richtmyer-Meshkov instability; front tracking ID RAYLEIGH-TAYLOR; FRONT TRACKING; NUMERICAL-SIMULATION; UNSTABLE INTERFACES; FLUID INTERFACES; MIXING RATES; SUPERNOVAE; ACCELERATION; SHOCKS; DRIVEN AB Front tracking has proved to bean accurate and efficient algorithm in the sense that tracking the interface can reduce the error significantly [9,10]. By applying this algorithm, we conduct numerical simulations of Richtmyer-Meshkov (RM) instabilities in spherical geometry for axisymmetric flow. We demonstrate scaling invariance with respect to shock Mach number for fluid mixing statistics, such as growth rate and volume fraction. Here the mixing is related to bulk transport rather than molecular mixing. Our results are validated by convergence under both mesh refinement and statistical ensemble averaging. We also show that the spherical geometry will converge to planar geometry when the number of modes of interface perturbation goes to infinity. (C) 2004 IMACS. Published by Elsevier B.V. All rights reserved. C1 SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Ctr Data Intens Comp, Upton, NY 11793 USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Methods Adv Sci Simulat Grp, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Complex Syst Grp, Los Alamos, NM 87545 USA. RP Zhang, YM (reprint author), SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. EM kuttush@ams.sunysb.edu; glimm@ams.sunysb.edu; dhs@tl3.lanl.gov; jgrove@lanl.eov; yzhang@ams.sunysb.edu NR 40 TC 7 Z9 7 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4754 J9 MATH COMPUT SIMULAT JI Math. Comput. Simul. PD MAY 11 PY 2004 VL 65 IS 4-5 BP 417 EP 430 DI 10.1016/j.matcom.2004.01.020 PG 14 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 823GP UT WOS:000221598400009 ER PT J AU Samulyak, R Prykarpatskyy, Y AF Samulyak, R Prykarpatskyy, Y TI Richtmyer-Meshkov instability in liquid metal flows: influence of cavitation and magnetic fields SO MATHEMATICS AND COMPUTERS IN SIMULATION LA English DT Article; Proceedings Paper CT Workshop on Wave Phenomena in Physics and Engineering CY MAY, 2003 CL Montreal, CANADA DE Richtmyer-Meshkov instability; MHD; cavitation ID TRACKING AB The influence of magnetic fields and cavitation on the Richtmyer-Meshkov (RM) instability in liquid mercury has been studied numerically in 2D geometry. Numerical results shed light on the evolution of the Muon Collider target proposed as a pulsed jet of mercury interacting with high intensity proton beams in a strong magnetic field. We have shown that a uniform longitudinal magnetic field significantly reduces amplitudes and velocities of surface instabilities and is able to stabilize the jet during period of time typical for the jet breakup at zero magnetic field. We have developed a simple homogeneous two-phase equation of state for modeling of liquids with cavitation bubbles and applied it to the study of the evolution of mercury due to the interaction with proton pulses. (C) 2004 IMACS. Published by Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Ctr Data Intens Comp, Upton, NY 11973 USA. RP Samulyak, R (reprint author), Brookhaven Natl Lab, Ctr Data Intens Comp, Upton, NY 11973 USA. EM rosamu@bnl.gov; yarpry@bnl.gov NR 24 TC 8 Z9 8 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4754 J9 MATH COMPUT SIMULAT JI Math. Comput. Simul. PD MAY 11 PY 2004 VL 65 IS 4-5 BP 431 EP 446 DI 10.1016/j.matcom.2004.01.019 PG 16 WC Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA 823GP UT WOS:000221598400010 ER PT J AU Gualandris, A Portegies Zwart, S Eggleton, PP AF Gualandris, A Portegies Zwart, S Eggleton, PP TI N-body simulations of stars escaping from the Orion nebula SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE methods : N-body simulations; binaries : spectroscopic; stars : individual : HD 34078; stars : individual : HD 37043; stars : individual : HD 38666 ID BINARY IOTA ORIONIS; OB RUNAWAY STARS; B-TYPE STARS; TRAPEZIUM CLUSTER; VELOCITIES; ORIGIN; EVOLUTION; SCATTERING; PHOTOMETRY; PULSARS AB We study the dynamical interaction in which the two single runaway stars, AE Aurige and mu Columbe, and the binary iota Orionis acquired their unusually high space velocity. The two single runaways move in almost opposite directions with a velocity greater than 100 km s(-1) away from the Trapezium cluster. The star iota Orionis is an eccentric (esimilar or equal to 0.8) binary moving with a velocity of about 10 km s(-1) at almost right angles with respect to the two single stars. The kinematic properties of the system suggest that a strong dynamical encounter occurred in the Trapezium cluster about 2.5 Myr ago. Curiously enough, the two binary components have similar spectral type but very different masses, indicating that their ages must be quite different. This observation leads to the hypothesis that an exchange interaction occurred in which an older star was swapped into the original iota Orionis binary. We test this hypothesis by a combination of numerical and theoretical techniques, using N-body simulations to constrain the dynamical encounter, binary evolution calculations to constrain the high orbital eccentricity of iota Orionis and stellar evolution calculations to constrain the age discrepancy of the two binary components. We find that an encounter between two low eccentricity (0.4less than or similar toeless than or similar to0.6) binaries with comparable binding energy, leading to an exchange and the ionization of the wider binary, provides a reasonable solution to this problem. C1 Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1012 WX Amsterdam, Netherlands. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Amsterdam, Sect Computat Sci, NL-1012 WX Amsterdam, Netherlands. RP Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1012 WX Amsterdam, Netherlands. EM alessiag@science.uva.nl RI Gualandris, Alessia/A-9421-2011 NR 55 TC 53 Z9 54 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0035-8711 EI 1365-2966 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD MAY 11 PY 2004 VL 350 IS 2 BP 615 EP 626 DI 10.1111/j.1365-2966.2004.07673.x PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 816FJ UT WOS:000221095500022 ER PT J AU Kipper, MJ Seifert, S Thiyagarajan, P Narasimhan, B AF Kipper, MJ Seifert, S Thiyagarajan, P Narasimhan, B TI Understanding polyanhydride blend phase behavior using scattering, microscopy, and molecular simulations SO POLYMER LA English DT Article DE polyanhydrides; polymer blend phase behavior; SAXS ID BIODEGRADABLE POLYMER BLEND; ATOMIC-FORCE MICROSCOPY; X-RAY-SCATTERING; DRUG-DELIVERY; BINARY-MIXTURES; MICROSPHERES; MISCIBILITY; KINETICS; RELEASE; DYNAMICS AB The phase behavior of a biocompatible binary polyanhydride blend system composed of poly[ 1,6-bis(p-carboxyphenoxy)hexane] (poly(CPH)) and poly(sebacic acid) (poly(SA)) is described. The phase behavior is determined from the CPH-SA segmental interaction parameter, chi, obtained from in situ small angle X-ray scattering (SAXS) experiments. The predicted phase diagram has an upper critical solution temperature (UCST) with a critical point of 114 degreesC. The phase diagram is validated by optical microscopy (cloud point determination) of blend films. However, the full range of blend compositions is not accessible via cloud point measurements, because the melting point of poly(CPH) is above the critical point. Additionally, the poly(CPH) crystallinity interferes with cloud point determination because the length scale of the amorphous phase separation and that of the crystallinity are both near the limit of resolution of the optical microscope. The poly(CPH)-rich region of the phase diagram was investigated by ex situ atomic force microscopy on thin blend films. Finally, in order to validate the use of molecular simulations to study energetic and structural properties of this system, chi is also computed from molecular dynamics both above and below the critical point. Excellent agreement is obtained for all three experimental methods and the computational technique. The results are compared to a simple group contribution method for computing the solubility parameters of the polymers. This technique fails to accurately predict the phase diagram. (C) 2004 Published by Elsevier Ltd. C1 Iowa State Univ, Dept Chem Engn, Ames, IA 50011 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Narasimhan, B (reprint author), Iowa State Univ, Dept Chem Engn, 2035 Sweeney Hall, Ames, IA 50011 USA. EM nbalaji@iastate.edu RI Narasimhan, Balaji/A-5487-2008; Kipper, Matt/B-6941-2013 OI Narasimhan, Balaji/0000-0002-7955-5353; Kipper, Matt/0000-0002-8818-745X NR 46 TC 20 Z9 20 U1 0 U2 10 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 J9 POLYMER JI Polymer PD MAY 11 PY 2004 VL 45 IS 10 BP 3329 EP 3340 DI 10.1016/j.polymer.2004.03.052 PG 12 WC Polymer Science SC Polymer Science GA 816UW UT WOS:000221135800025 ER PT J AU Georgiev, G Gilfoy, N Cebe, P Capel, M AF Georgiev, G Gilfoy, N Cebe, P Capel, M TI Phase transitions and structural parameters of HIQ-40 liquid crystalline co-polyester SO POLYMER LA English DT Article DE liquid crystalline co-polyester; X-ray scattering; nematic ID RIGID AMORPHOUS PHASE; TIME-RESOLVED SAXS; X-RAY-SCATTERING; THERMOTROPIC POLYESTERS; POLY(PHENYLENE SULFIDE); DIELECTRIC-RELAXATION; THERMAL TRANSITIONS; ETHER KETONE); COPOLYESTER; POLYMERS AB We describe the impact of thermal treatment on the structure and phase transitions of the liquid crystalline aromatic co-polyester, HIQ-40, comprising 40 mol% p-hydroxybenzoic acid (H), 30 mol% isophthalic acid (1), and 30 mol% p-hydroquinone (Q). Simultaneous, real-time wide and small angle X-ray scattering (WAXS, SAXS), differential scanning calorimetry, and optical ellipsometry were used to study initially isotropic, amorphous films of HIQ-40. Films were annealed above the glass transition temperature, T-g at temperatures, T-a from 130 to 290 degreesC. Depending upon T-g thermal treatment results in formation of regions of nematic order and/or crystalline order in a disordered matrix. As T-a increases, molecular mobility in the amorphous phase increases resulting in a reduction in T-a Two or three endothermic events are seen in all samples by thermal analysis. The lowest temperature endotherm is associated with melting of crystals formed either at T-a or during the thermal scan. The two higher temperature endotherm features result from transformation of crystal melt-to-nematic, and formation of more mobile nematic domains from constrained liquid, respectively, and are relatively insensitive to T-a. A strong Bragg scattering peak is seen for T-u < 290 degreesC corresponding to formation of two-phase structure comprising crystals and disordered phase. At higher temperatures, very strong scattered intensity in the SAXS pattern re-emerges, even after all WAXS crystal reflections have disappeared. Results suggest that a two-phase structure, of ordered nematic domains co-existing with less ordered regions, may be forming continuously above the crystal melting point. (C) 2004 Elsevier Ltd. All rights reserved. C1 Tufts Univ, Dept Phys & Astron, Medford, MA 02155 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Tufts Univ, Dept Phys & Astron, STC 208,4 Colby St, Medford, MA 02155 USA. EM peggy.cebe@tufts.edu NR 33 TC 1 Z9 1 U1 1 U2 3 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 EI 1873-2291 J9 POLYMER JI Polymer PD MAY 11 PY 2004 VL 45 IS 10 BP 3429 EP 3440 DI 10.1016/j.polymer.2004.03.030 PG 12 WC Polymer Science SC Polymer Science GA 816UW UT WOS:000221135800035 ER PT J AU Hosier, IL Alamo, RG Lin, JS AF Hosier, IL Alamo, RG Lin, JS TI Lamellar morphology of random metallocene propylene copolymers studied by atomic force microscopy SO POLYMER LA English DT Article DE propylene copolymers; morphology; atomic force microscopy ID ISOTACTIC POLYPROPYLENE; GAMMA-PHASE; POLYMER CRYSTALLIZATION; ETHYLENE COPOLYMERS; MELT; MICROSTRUCTURE; THICKNESS; POLYMORPH; EVOLUTION; COMONOMER AB Four sets of propylene based random copolymers with co-units of ethylene, 1-butene, 1-hexene and 1-octene, and a total defect content up to similar to 9 mol% (including co-unit and other defects), were studied after rapid and isothermal crystallization. Etched film surfaces and ultrarnicrotomed plaques were imaged so as to enhance contrast and minimize catalyst and co-catalyst residues. While increasing concentration of structural irregularities breaks down spherulitic habits, the formation of the gamma polymorph has a profound effect on the lamellar morphology. Lamellae grown in the radial axis of the spherulite and branches hereon are replaced in gamma-rich copolymers with a dense array of short lamellae transverse or tilted to the main structural growth axis. This is the expected orientation for gamma iPP branching from a seeds. Spherulites are formed in copolymers with non-crystallizable units ( 1-hexene and 1-octene) up to similar to 3 mol% total defect content and were observed up to similar to 6 mol% in those with partially crystallizable comonorners (ethylene and 1-butene). However, lamellae were observed in all the copolymers analyzed, even in the most defective ones, highlighting the important role of the gamma polymorph in propagating lamellar crystallites in poly(propylenes) with a high concentration of defects. Long periods measured from AFM and SAXS are comparatively analyzed. (C) 2004 Elsevier Ltd. All rights reserved. C1 Florida State Univ, Coll Med, FAMU, Dept Chem Engn, Tallahassee, FL 32310 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Florida State Univ, Coll Med, FAMU, Dept Chem Engn, 2525 Pottsdamer St, Tallahassee, FL 32310 USA. EM alamo@eng.fsu.edu NR 41 TC 58 Z9 58 U1 2 U2 21 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0032-3861 EI 1873-2291 J9 POLYMER JI Polymer PD MAY 11 PY 2004 VL 45 IS 10 BP 3441 EP 3455 DI 10.1016/j.polymer.2004.02.071 PG 15 WC Polymer Science SC Polymer Science GA 816UW UT WOS:000221135800036 ER PT J AU Asthagiri, D Pratt, LR Kress, JD Gomez, MA AF Asthagiri, D Pratt, LR Kress, JD Gomez, MA TI Hydration and mobility of HO-(aq) SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID GENERALIZED GRADIENT APPROXIMATION; QUASI-CHEMICAL THEORY; AUGMENTED-WAVE METHOD; MOLECULAR-DYNAMICS; ULTRASOFT PSEUDOPOTENTIALS; AQUEOUS-SOLUTIONS; SOLVATION SHELL; HYDROXYL IONS; LIQUID WATER; TRANSPORT AB The hydroxide anion plays an essential role in many chemical and biochemical reactions. But a molecular-scale description of its hydration state, and hence also its transport, in water is currently controversial. The statistical mechanical quasichemical theory of solutions suggests that HO.[H2O](3)(-) is the predominant species in the aqueous phase under standard conditions. This result agrees with recent spectroscopic studies on hydroxide water clusters and with the available thermodynamic hydration free energies. In contrast, a recent ab initio molecular dynamics simulation has suggested that HO.[H2O](4)(-) is the only dominant aqueous solution species. We apply adiabatic ab initio molecular dynamics simulations and find good agreement with both the quasichemical theoretical predictions and experimental results. The present results suggest a picture that is simpler, more traditional, but with additional subtlety. These coordination structures are labile but the tricoordinate species is the prominent case. This conclusion is unaltered with changes in the electronic density functional. No evidence is found for rate-determining activated interconversion of a HO.[H2O](4)(-) trap structure to HO.[H2O](3)(-) mediating hydroxide transport. The view of HO- diffusion as the hopping of a proton hole has substantial validity, the rate depending largely on the dynamic disorder of the water hydrogen-bond network. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Mt Holyoke Coll, Dept Chem, S Hadley, MA 01075 USA. RP Pratt, LR (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM lrp@lanl.gov RI Asthagiri, Dilipkumar/A-3383-2010; Pratt, Lawrence/H-7955-2012; Asthagiri, Dilipkumar/P-9450-2016 OI Pratt, Lawrence/0000-0003-2351-7451; Asthagiri, Dilipkumar/0000-0001-5869-0807 NR 61 TC 123 Z9 123 U1 1 U2 31 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD MAY 11 PY 2004 VL 101 IS 19 BP 7229 EP 7233 DI 10.1073/pnas.0401696101 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 822SA UT WOS:000221559100007 PM 15123832 ER PT J AU Cao, CS Xia, G Holladay, J Jones, E Wang, Y AF Cao, CS Xia, G Holladay, J Jones, E Wang, Y TI Kinetic studies of methanol steam reforming over Pd/ZnO catalyst using a microchannel reactor SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE kinetics; methanol steam reforming; microchannel reactor; Pd/ZnO catalyst ID CU/ZNO/AL2O3; COPPER AB A microchannel reactor with effective heat exchange has been developed to evaluate catalyst performance and measure reaction kinetics. The reactor provides an isothermal environment for rate measurement of the endothermic methanol steam reforming reactions over a Pd/ZnO catalyst in a wide temperature range ( 160-310degreesC). The apparent activation energy and rate equation have been determined to fit the power law expression: -r(A)(mmol/kg(cat)/s) = 2.9047 x 10(10)e-(94800/RT) p(MeOH)(0.715) p(H2O)(0.088) This result provides kinetic data for the design of a miniature fuel processor for small fuel cell applications. The rate equation has been applied to a three-dimensional pseudo-hoino.-eneous model to simulate temperature profiles in both microchannel and conventional fixed bed reactors. (C) 2004 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Cao, CS (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,MSIN K8-93, Richland, WA 99352 USA. EM chunshe.cao@pnl.gov RI Wang, Yong/C-2344-2013 NR 19 TC 72 Z9 77 U1 1 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD MAY 10 PY 2004 VL 262 IS 1 BP 19 EP 29 DI 10.1016/j.apcata.2003.11.043 PG 11 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA 818RW UT WOS:000221263200003 ER PT J AU Wong, J Wall, M Schwartz, AJ Xu, R Holt, M Hong, H Zschack, P Chiang, TC AF Wong, J Wall, M Schwartz, AJ Xu, R Holt, M Hong, H Zschack, P Chiang, TC TI Imaging phonons in a fcc Pu-Ga alloy by thermal diffuse x-ray scattering SO APPLIED PHYSICS LETTERS LA English DT Article ID DELTA-PLUTONIUM; DISPERSIONS AB X-ray thermal diffuse scattering intensity patterns from phonons in a fcc delta-Pu-Ga alloy have been recorded using an 18 keV undulator x-ray beam with a beam diameter of 25 mum. The results are consistent with patterns calculated using the Born-von Karman force constant model of lattice dynamics, and support the pronounced softening of the transverse acoustic branch along the [111] direction observed from inelastic x-ray scattering measurements. This work demonstrates the feasibility of using a "large-grain, small beam" approach to study lattice properties, such as phonon dispersion curves, of materials not readily available in the form of large single crystals. (C) 2004 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Wong, J (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. EM wong10@llnl.gov RI Chiang, Tai/H-5528-2011; Xu, Ruqing/K-3586-2012 OI Xu, Ruqing/0000-0003-1037-0059 NR 16 TC 11 Z9 11 U1 1 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 10 PY 2004 VL 84 IS 19 BP 3747 EP 3749 DI 10.1063/1.1737482 PG 3 WC Physics, Applied SC Physics GA 817XL UT WOS:000221210100009 ER PT J AU Zhao, YJ Mahadevan, P Zunger, A AF Zhao, YJ Mahadevan, P Zunger, A TI Comparison of predicted ferromagnetic tendencies of Mn substituting the Ga site in III-V's and in I-III-VI2 chalcopyrite semiconductors SO APPLIED PHYSICS LETTERS LA English DT Article ID TOTAL-ENERGY; FORMALISM AB We report density-functional calculations of the ferromagnetic (FM) stabilization energy delta=E-FM-E-AFM for differently oriented Mn pairs in III-V's (GaN, GaP, GaAs) and chalcopyrite (CuGaS2, CuGaSe2, CuGaTe2) semiconductors. Ferromagnetism is found to be the universal ground state (delta<0) in all cases. The order of FM stability in III-V's is GaN>GaP>GaAs, whereas in chalcopyrites it is CuGaS2>CuGaSe2>CuGaTe2. Considering both groups, the order is GaN-->GaP-->GaAs-->CuGaS2-->CuGaSe2-->GaSbapproximate toCuGaTe(2). The stronger FM stabilization in III-V's is attributed to the stronger covalent coupling between the Mn 3d and the anion p orbitals. In contrast to expectations based on Ruderman-Kittel-(Kasuya)-Yosida, (i) all Mn-Mn pair separations show FM, with no FM to antiferromagnetic oscillations and, (ii) FM is orientationally dependent, with <110> Mn-Mn pairs being the most FM. (C) 2004 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Natl Renewable Energy Lab, Golden, CO 80401 USA. EM azunger@nrel.gov RI Zhao, Yu-Jun/A-1219-2011; Zunger, Alex/A-6733-2013 OI Zhao, Yu-Jun/0000-0002-6923-1099; NR 27 TC 24 Z9 24 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 10 PY 2004 VL 84 IS 19 BP 3753 EP 3755 DI 10.1063/1.1737466 PG 3 WC Physics, Applied SC Physics GA 817XL UT WOS:000221210100011 ER PT J AU Lee, JS Li, Y Lin, Y Lee, SY Jia, QX AF Lee, JS Li, Y Lin, Y Lee, SY Jia, QX TI Hydrogen-induced degradation in epitaxial and polycrystalline (Ba,Sr)TiO3 thin films SO APPLIED PHYSICS LETTERS LA English DT Article ID FERROELECTRIC PB(ZR,TI)O-3; BA0.6SR0.4TIO3 FILMS; CAPACITORS; ELECTRODE; PB(ZR AB A comparative study of hydrogen-induced degradation in epitaxial and polycrystalline (Ba,Sr)TiO3 (BST) thin films has been carried out. Epitaxial BST was prepared on SrRuO3 (SRO)/SrTiO3 (STO), whereas polycrystalline BST was deposited on SRO/SiOx/Si. After the Pt top electrode deposition, we have measured the dielectric response and leakage current characteristics before and after annealing in forming gas (6% hydrogen/94% argon) at 450 degreesC for 1 h. Even though both samples have the same capacitor architecture, Pt/BST/SRO, the degree of degradation after annealing in forming gas was found to be quite different. Epitaxial BST films were highly immune to hydrogen degradation; however, polycrystalline BST films degraded severely in terms of both dielectric and electrical properties. We show that the grain boundary is one of the main sources of hydrogen-induced degradation. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea. RP Lee, JS (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM jslee@lanl.gov; qxjia@lanl.gov RI Lee, Jang-Sik/A-6629-2008; Jia, Q. X./C-5194-2008; lin, yuan/B-9955-2013 OI Lee, Jang-Sik/0000-0002-1096-1783; NR 15 TC 25 Z9 25 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 10 PY 2004 VL 84 IS 19 BP 3825 EP 3827 DI 10.1063/1.1745105 PG 3 WC Physics, Applied SC Physics GA 817XL UT WOS:000221210100035 ER PT J AU Wierer, JJ Krames, MR Epler, JE Gardner, NF Craford, MG Wendt, JR Simmons, JA Sigalas, MM AF Wierer, JJ Krames, MR Epler, JE Gardner, NF Craford, MG Wendt, JR Simmons, JA Sigalas, MM TI InGaN/GaN quantum-well heterostructure light-emitting diodes employing photonic crystal structures SO APPLIED PHYSICS LETTERS LA English DT Article ID SPONTANEOUS EMISSION; EXTRACTION; MICROCAVITY; EFFICIENCY AB Electrical operation of InGaN/GaN quantum-well heterostructure photonic crystal light-emitting diodes (PXLEDs) is demonstrated. A triangular lattice photonic crystal is formed by dry etching into the top GaN layer. Light absorption from the metal contact is minimized because the top GaN layers are engineered to provide lateral current spreading, allowing carrier recombination proximal to the photonic crystal yet displaced from the metal contact. The chosen lattice spacing for the photonic crystal causes Bragg scattering of guided modes out of the LED, increasing the extraction efficiency. The far-field radiation patterns of the PXLEDs are heavily modified and display increased radiance, up to similar to1.5 times brighter compared to similar LEDs without the photonic crystal. (C) 2004 American Institute of Physics. C1 Adv Labs, Lumileds Lighting, San Jose, CA 95131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Agilent Technol, Agilent Labs, Palo Alto, CA 94304 USA. RP Wierer, JJ (reprint author), Adv Labs, Lumileds Lighting, 370 W Trimble Rd, San Jose, CA 95131 USA. EM jonathan.wierer@lumileds.com RI Wierer, Jonathan/G-1594-2013 OI Wierer, Jonathan/0000-0001-6971-4835 NR 18 TC 316 Z9 319 U1 6 U2 92 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 10 PY 2004 VL 84 IS 19 BP 3885 EP 3887 DI 10.1063/1.1738934 PG 3 WC Physics, Applied SC Physics GA 817XL UT WOS:000221210100055 ER PT J AU Devanathan, R Gao, F Weber, WJ AF Devanathan, R Gao, F Weber, WJ TI Amorphization of silicon carbide by carbon displacement SO APPLIED PHYSICS LETTERS LA English DT Article ID IRRADIATION-INDUCED AMORPHIZATION; DEFECT PRODUCTION; COMPOSITES; FUSION; DAMAGE AB We have used molecular dynamics simulations to examine the possibility of amorphizing silicon carbide (SiC) by exclusively displacing C atoms. At a defect generation corresponding to 0.2 displacements per atom, the enthalpy surpasses the level of melt-quenched SiC, the density decreases by about 15%, and the radial distribution function shows a lack of long-range order. Prior to amorphization, the surviving defects are mainly C Frenkel pairs (67%), but Si Frenkel pairs (18%) and antisite defects (15%) are also present. The results indicate that SiC can be amorphized by C sublattice displacements. Chemical short-range disorder, arising mainly from Frenkel pair production, plays a significant role in the amorphization. (C) 2004 American Institute of Physics. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Devanathan, R (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, MS K8-93,POB 999, Richland, WA 99352 USA. EM ram.devanathan@pnl.gov RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; Devanathan, Ram/C-7247-2008 OI Weber, William/0000-0002-9017-7365; Devanathan, Ram/0000-0001-8125-4237 NR 20 TC 24 Z9 24 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 10 PY 2004 VL 84 IS 19 BP 3909 EP 3911 DI 10.1063/1.1739515 PG 3 WC Physics, Applied SC Physics GA 817XL UT WOS:000221210100063 ER PT J AU Tegmark, M Blanton, MR Strauss, MA Hoyle, F Schlegel, D Scoccimarro, R Vogeley, MS Weinberg, DH Zehavi, I Berlind, A Budavari, TS Connolly, A Eisenstein, DJ Finkbeiner, D Frieman, JA Gunn, JE Hamilton, AJS Hui, L Jain, B Johnston, D Kent, S Lin, H Nakajima, R Nichol, RC Ostriker, JP Pope, A Scranton, R Seljak, U Sheth, RK Stebbins, A Szalay, AS Szapudi, I Verde, L Xu, YZ Annis, J Bahcall, NA Brinkmann, J Burles, S Castander, FJ Csabai, I Loveday, J Doi, M Fukugita, M Gott, JR Hennessy, G Hogg, DW Ivezic, Z Knapp, GR Lamb, DQ Lee, BC Lupton, RH McKay, TA Kunszt, P Munn, JA O'Connell, L Peoples, J Pier, JR Richmond, M Rockosi, C Schneider, DP Stoughton, C Tucker, DL Vanden Berk, DE Yanny, B York, DG AF Tegmark, M Blanton, MR Strauss, MA Hoyle, F Schlegel, D Scoccimarro, R Vogeley, MS Weinberg, DH Zehavi, I Berlind, A Budavari, TS Connolly, A Eisenstein, DJ Finkbeiner, D Frieman, JA Gunn, JE Hamilton, AJS Hui, L Jain, B Johnston, D Kent, S Lin, H Nakajima, R Nichol, RC Ostriker, JP Pope, A Scranton, R Seljak, U Sheth, RK Stebbins, A Szalay, AS Szapudi, I Verde, L Xu, YZ Annis, J Bahcall, NA Brinkmann, J Burles, S Castander, FJ Csabai, I Loveday, J Doi, M Fukugita, M Gott, JR Hennessy, G Hogg, DW Ivezic, Z Knapp, GR Lamb, DQ Lee, BC Lupton, RH McKay, TA Kunszt, P Munn, JA O'Connell, L Peoples, J Pier, JR Richmond, M Rockosi, C Schneider, DP Stoughton, C Tucker, DL Vanden Berk, DE Yanny, B York, DG TI The three-dimensional power spectrum of galaxies from the Sloan Digital Sky Survey SO ASTROPHYSICAL JOURNAL LA English DT Review DE galaxies : statistics; large-scale structure of universe; methods : data analysis ID MICROWAVE-ANISOTROPY-PROBE; SPECTROSCOPIC TARGET SELECTION; LARGE-SCALE STRUCTURE; REDSHIFT SURVEY; LUMINOSITY FUNCTION; WMAP OBSERVATIONS; COSMOLOGICAL SIMULATIONS; RICH CLUSTERS; PARAMETER-ESTIMATION; MASS FLUCTUATIONS AB We measure the large-scale real-space power spectrum Pd(k) by using a sample of 205,443 galaxies from the Sloan Digital Sky Survey, covering 2417 effective square degrees with mean redshift z approximate to 0.1. We employ a matrix-based method using pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 22 k-bands of both the clustering power and its anisotropy due to redshift-space distortions, with narrow and well-behaved window functions in the range 0.02 h Mpc(-1) < k < 0.3 h Mpc(-1). We pay particular attention to modeling, quantifying, and correcting for potential systematic errors, nonlinear redshift distortions, and the artificial red-tilt caused by luminosity-dependent bias. Our results are robust to omitting angular and radial density fluctuations and are consistent between different parts of the sky. Our final result is a measurement of the real-space matter power spectrum Pd(k) up to an unknown overall multiplicative bias factor. Our calculations suggest that this bias factor is independent of scale to better than a few percent for k < 0.1 h Mpc(-1), thereby making our results useful for precision measurements of cosmological parameters in conjunction with data from other experiments such as the Wilkinson Microwave Anisotropy Probe satellite. The power spectrum is not well-characterized by a single power law but unambiguously shows curvature. As a simple characterization of the data, our measurements are well fitted by a flat scale-invariant adiabatic cosmological model with h Omega(m) = 0.213 +/- 0.023 and sigma(8) = 0.89 +/- 0.02 for L-* galaxies, when fixing the baryon fraction Omega(b).Omega(m) = 0.17 and the Hubble parameter h = 0.72; cosmological interpretation is given in a companion paper. C1 Univ Penn, Dept Phys, Philadelphia, PA 19104 USA. NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Univ Chicago, Ctr Cosmol Phys, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Univ Arizona, Dept Astron, Tucson, AZ 85721 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA. Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA. Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Apache Point Observ, Sunspot, NM 88349 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. CSIC, Inst Estudis Espacials Catalunya, ES-08034 Barcelona, Spain. Univ Sussex, Sussex Astron Ctr, Brighton BN1 9QJ, E Sussex, England. Univ Tokyo, Inst Astron, Kashiwa, Chiba 2778582, Japan. USN Observ, Flagstaff Stn, Flagstaff, AZ 86002 USA. Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA. Rochester Inst Technol, Dept Phys, Rochester, NY 14623 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. RP Univ Penn, Dept Phys, Philadelphia, PA 19104 USA. EM andrew.hamilton@colorado.edu RI Csabai, Istvan/F-2455-2012; McKay, Timothy/C-1501-2009; OI McKay, Timothy/0000-0001-9036-6150; Kunszt, Peter/0000-0003-0933-4763; Verde, Licia/0000-0003-2601-8770; Csabai, Istvan/0000-0001-9232-9898; Hogg, David/0000-0003-2866-9403; Tucker, Douglas/0000-0001-7211-5729 NR 136 TC 1112 Z9 1124 U1 4 U2 15 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP 702 EP 740 DI 10.1086/382125 PN 1 PG 39 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RJ UT WOS:000221261900007 ER PT J AU Duchene, G McCabe, C Ghez, AM Macintosh, BA AF Duchene, G McCabe, C Ghez, AM Macintosh, BA TI A multiwavelength scattered light analysis of the dust grain population in the GG Tauri circumbinary ring SO ASTROPHYSICAL JOURNAL LA English DT Article DE circumstellar matter; dust, extinction; planetary systems : protoplanetary disks; scattering; stars : individual (GG Tauri) ID HUBBLE-SPACE-TELESCOPE; ON CIRCUMSTELLAR DISK; T-TAURI; SIZE DISTRIBUTION; ACCRETION DISKS; BINARY-SYSTEM; STARS; IMAGES; EXTINCTION; DISTRIBUTIONS AB We present the first 3.8 mum image of the dusty ring surrounding the young binary system GG Tau, obtained with the W. M. Keck II 10 m telescope's adaptive optics system. This is the longest wavelength at which the ring has been detected in scattered light so far, allowing a multiwavelength analysis of the scattering properties of the dust grains present in this protoplanetary disk in combination with previous, shorter wavelength, Hubble Space Telescope images. We find that the scattering phase function of the dust grains in the disk is only weakly dependent on the wavelength. This is inconsistent with dust models inferred from observations of the interstellar medium or dense molecular clouds. In particular, the strongly forward-throwing scattering phase function observed at 3.8 mum implies a significant increase in the population of large (greater than or similar to1 mum) grains, which provides direct evidence for grain growth in the ring. However, the grain size distribution required to match the 3.8 mum image of the ring is incompatible with its published 1 mum polarization map, implying that the dust population is not uniform throughout the ring. We also show that our 3.8 mum scattered light image probes a deeper layer of the ring than previous shorter wavelength images, as demonstrated by a shift in the location of the inner edge of the disk's scattered light distribution between 1 and 3.8 mum. We therefore propose a stratified structure for the ring in which the surface layers, located similar to 50 AU above the ring midplane, contain dust grains that are very similar to those found in dense molecular clouds, while the region of the ring located similar to 25 AU from the midplane contains significantly larger grains. This stratified structure is likely the result of vertical dust settling and/or preferred grain growth in the densest parts of the ring. C1 Univ Calif Los Angeles, Div Astron & Astrophys, Los Angeles, CA 90095 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Duchene, G (reprint author), Univ Calif Los Angeles, Div Astron & Astrophys, Math Sci Bldg, Los Angeles, CA 90095 USA. EM duchene@astro.ucla.edu NR 49 TC 49 Z9 49 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP 969 EP 982 DI 10.1086/383126 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RJ UT WOS:000221261900028 ER PT J AU Pruet, J Thompson, TA Hoffman, RD AF Pruet, J Thompson, TA Hoffman, RD TI Nucleosynthesis in outflows from the inner regions of collapsars SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; gamma rays : bursts; nuclear reactions, nucleosynthesis, abundances ID NEUTRINO-DRIVEN WINDS; GAMMA-RAY BURSTS; R-PROCESS NUCLEOSYNTHESIS; METAL-POOR STARS; DIVERSE SUPERNOVA SOURCES; 25 APRIL 1998; ACCRETION DISKS; BLACK-HOLES; PROCESS COMPONENTS; EARLY GALAXY AB We consider nucleosynthesis in outflows originating from the inner regions of viscous accretion disks formed after the collapse of a rotating massive star. We show that windlike outflows driven by viscous and neutrino heating can efficiently synthesize Fe group elements moving at near-relativistic velocities. The mass of Ni-56 synthesized and the asymptotic velocities attained in our calculations are in accord with those inferred from observations of SN 1998bw and SN 2003dh. These steady windlike outflows are generally proton-rich, characterized by only modest entropies, and consequently synthesize essentially nothing heavier than the Fe group elements. We also discuss bubble-like outflows resulting from rapid energy deposition in localized regions near or in the accretion disk. These intermittent ejecta emerge with low electron fraction and are a promising site for the synthesis of the A = 130 r-process peak elements. C1 Lawrence Livermore Natl Lab, Div N, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Calif Berkeley, Theoret Astrophys Ctr, Berkeley, CA 94720 USA. RP Pruet, J (reprint author), Lawrence Livermore Natl Lab, Div N, Livermore, CA 94550 USA. EM pruet1@llnl.gov; thomp@astro.berkeley.edu; rdhoffman@llnl.gov NR 54 TC 55 Z9 55 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP 1006 EP 1018 DI 10.1086/382036 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RJ UT WOS:000221261900033 ER PT J AU Bell, JB Day, MS Rendleman, CA Woosley, SE Zingale, M AF Bell, JB Day, MS Rendleman, CA Woosley, SE Zingale, M TI Direct numerical simulations of type Ia supernovae flames. I. The Landau-Darrieus instability SO ASTROPHYSICAL JOURNAL LA English DT Article DE conduction; hydrodynamics; methods : numerical; nuclear reactions, nucleosynthesis, abundances; supernovae : general; white dwarfs ID NON-LINEAR ANALYSIS; HYDRODYNAMIC INSTABILITY; THERMONUCLEAR FLAMES; PREMIXED FLAMES; LAMINAR FLAMES; NUCLEAR FLAMES; WHITE-DWARFS; EXPLOSION; FRONTS; FLOWS AB Planar flames are intrinsically unstable in open domains because of thermal expansion across the burning front, i.e., the Landau-Darrieus instability. This instability leads to wrinkling and growth of the flame surface and corresponding acceleration of the flame, until it is stabilized by cusp formation. We look at the Landau-Darrieus instability for C/O thermonuclear flames at conditions relevant to the late stages of a Type Ia supernova explosion. Two-dimensional direct numerical simulations of both single-mode and multimode perturbations using a low Mach number hydrodynamics code are presented. We show the effect of the instability on the flame speed as a function of both the density and domain size, demonstrate the existence of the small-scale cutoff to the growth of the instability, and look for the proposed breakdown of the nonlinear stabilization at low densities. The effects of curvature on the flame, are quantified through measurements of the growth rate and computation of the corresponding Markstein number. While accelerations of a few percent are observed, they are too small to have any direct outcome on the supernova explosion. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Computat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. RP Bell, JB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Computat Sci & Engn, Berkeley, CA 94720 USA. OI Zingale, Michael/0000-0001-8401-030X NR 28 TC 21 Z9 21 U1 1 U2 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP 1029 EP 1038 DI 10.1086/383023 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RJ UT WOS:000221261900035 ER PT J AU de Koning, CA Bieber, JW AF de Koning, CA Bieber, JW TI Probing heliospheric turbulence with cosmic rays: Theory SO ASTROPHYSICAL JOURNAL LA English DT Article DE magnetic fields; solar wind; turbulence ID INTERPLANETARY SCINTILLATIONS; PARTICLE-TRANSPORT; MAGNETIC-FIELDS; GRADIENTS; DIFFUSION AB Cosmic rays impacting a spacecraft have already passed through and interacted with the turbulent solar wind surrounding the spacecraft; therefore, they carry information on the three-dimensional structure of the turbulence. In particular, the simple, unlagged correlation between the magnetic fluctuations and fluctuations of the cosmic-ray flux can potentially provide unique information on the detailed nature of interplanetary magnetic turbulence. Starting with the Vlasov equation, subject to the usual quasi-linear approximations, we derive the leading-order approximation of the particle-field correlation for generalized axisymmetric turbulence geometry in a plasma flowing in an arbitrary direction with respect to the average magnetic field. This work presents the theoretical basis for interpreting future measurements of the particle-field correlation in the real solar wind. As an example, we apply the theory to mirror-symmetric magnetostatic slab turbulence and clearly show the effect of the fluctuating convection electric field. C1 Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA. RP Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA. EM dekoning@lanl.gov NR 32 TC 1 Z9 1 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP 1200 EP 1209 DI 10.1086/383177 PN 1 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RJ UT WOS:000221261900049 ER PT J AU Savin, DW Krstic, PS Haiman, Z Stancil, PC AF Savin, DW Krstic, PS Haiman, Z Stancil, PC TI Rate coefficient for H(+)+H(2)(X(1)Sigma(+)(g),v=0, J=0) -> H(1s)+H(2)(+) charge transfer and some cosmological implications SO ASTROPHYSICAL JOURNAL LA English DT Article DE atomic data; early universe; galaxies : formation; molecular data; molecular processes; stars : formation ID MECHANICAL REACTIVE SCATTERING; PLUS DIATOM SYSTEMS; MOLECULAR-HYDROGEN; PRIMORDIAL GAS; EARLY UNIVERSE; OBJECTS; CLOUDS; APPROXIMATIONS; GALAXIES; SHOCKS AB Krstic has carried out the first quantum mechanical calculations near threshold for the charge transfer (CT) process H(+) + H(2)(X(1)Sigma(g)(+), nu = 0, J = 0) --> H(1s) + H(2)(+). These results are relevant for models of primordial galaxy and first star formation that require reliable atomic and molecular data for obtaining the hydrogen chemistry of the early universe. Using the results of Krstic, we calculate the relevant CT rate coefficient for temperatures between 100 and 30,000 K. We also present a simple fit that can be readily implemented into early universe chemical models. Additionally, we explore how the range of previously published data for this reaction translates into uncertainties in the predicted gas temperature and H(2) relative abundance in a collapsing primordial gas cloud. Our new data significantly reduce these cosmological uncertainties that are due to the uncertainties in the previously published CT rate coefficients. C1 Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Columbia Univ, Dept Astron, New York, NY 10027 USA. Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA. Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA. RP Savin, DW (reprint author), Columbia Univ, Columbia Astrophys Lab, 538 W 120th St, New York, NY 10027 USA. EM savin@astro.columbia.edu; krsticp@ornl.gov; zoltan@astro.columbia.edu; stancil@physast.uga.edu RI Savin, Daniel/B-9576-2012 OI Savin, Daniel/0000-0002-1111-6610 NR 40 TC 39 Z9 39 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 10 PY 2004 VL 606 IS 2 BP L167 EP L170 DI 10.1086/421108 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 818RL UT WOS:000221262100020 ER PT J AU Fabijonas, BR Holm, DD AF Fabijonas, BR Holm, DD TI Multi-frequency Craik-criminale solutions of the Navier-Stokes equations SO JOURNAL OF FLUID MECHANICS LA English DT Article ID ELLIPTIC INSTABILITY; 3-DIMENSIONAL INSTABILITY; SECONDARY INSTABILITIES; INCOMPRESSIBLE FLUID; ROTATING FLUIDS; FLOWS; STABILITY; TURBULENCE; DYNAMICS AB An exact Craik-Criminale (CC) solution to the incompressible Navier-Stokes (NS) equations describes the instability of an elliptical columnar flow interacting with a single Kelvin wave. These CC solutions are extended to allow multi-harmonic Kelvin waves to interact with any exact 'base' solution of the NS equations. The interaction is evaluated along an arbitrarily chosen flowline of the base solution, so exact nonlinear instability in this context is locally convective, rather than absolute. Furthermore, an iterative method called 'WKB-bootstrapping' is introduced which successively adds Kelvin waves with incommensurate phases to the extended CC solutions. In Illustrating WKB bootstrapping, we construct a succession of extended nonlinear CC solutions consisting of a circular columnar flow interacting progressively with one (Kelvin 1887), two (Fabijonas & Lifschitz 1996), or three waves with incommensurate phases. The phase of each wave packet is frozen into the previous flow and we examine the exact nonlinear convective instability induced at each stage (primary, secondary, tertiary). At each stage, the flow becomes progressively more unstable. C1 So Methodist Univ, Dept Math, Dallas, TX 75275 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England. RP Fabijonas, BR (reprint author), So Methodist Univ, Dept Math, Dallas, TX 75275 USA. OI Holm, Darryl D/0000-0001-6362-9912 NR 22 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD MAY 10 PY 2004 VL 506 BP 207 EP 215 DI 10.1017/S0022112004008511 PG 9 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 823ZJ UT WOS:000221652800008 ER PT J AU Beneke, M Chapovsky, AP Signer, A Zanderighi, G AF Beneke, M Chapovsky, AP Signer, A Zanderighi, G TI Effective theory calculation of resonant high-energy scattering SO NUCLEAR PHYSICS B LA English DT Article ID MODIFIED PERTURBATION-THEORY; 2-LOOP PROPAGATOR INTEGRALS; COLLINEAR EFFECTIVE THEORY; HEAVY UNSTABLE PARTICLES; EFFECTIVE FIELD-THEORY; FERMION-LOOP SCHEME; W-PAIR PRODUCTION; NONFACTORIZABLE CORRECTIONS; RADIATIVE-CORRECTIONS; FEYNMAN-INTEGRALS AB Tests of the Standard Model and its hypothetical extensions require precise theoretical predictions for processes involving massive, unstable particles. It is well-known that ordinary weak-coupling perturbation theory breaks down due to intermediate singular propagators. Various pragmatic approaches have been developed to deal with this difficulty. In this paper we construct an effective field theory for resonant processes utilizing the hierarchy of scales between the mass of the unstable particle, M, and its width, Gamma. The effective theory allows calculations to be systematically arranged into a series in g(2) and Gamma/M, and preserves gauge invariance in every step. We demonstrate the applicability of this method by calculating explicitly the inclusive line shape of a scalar resonance in an Abelian gauge-Yukawa model at next-to-leading order in Gamma/M and the weak couplings. We also discuss the extension to next-to-next-to-leading order and compute an interesting subset of these corrections. (C) 2004 Elsevier B.V. All rights reserved. C1 Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany. Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Beneke, M (reprint author), Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany. EM chapovsk@physik.rwth-aachen.de NR 48 TC 46 Z9 46 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 10 PY 2004 VL 686 IS 1-2 BP 205 EP 247 DI 10.1016/j.nuclphysb.2004.03.016 PG 43 WC Physics, Particles & Fields SC Physics GA 818FF UT WOS:000221230300011 ER PT J AU Mullins, DR AF Mullins, DR TI Adsorption of CO and C2H4 on Rh-loaded thin-film praseodymium oxide SO SURFACE SCIENCE LA English DT Article DE lanthanides; rhodium; carbon monoxide; alkenes; soft x-ray photoelectron spectroscopy; catalysis ID CERIUM OXIDE; SURFACES; DISSOCIATION; OXYGEN; NO; DESORPTION; PHOTOEMISSION; ETHYLIDYNE; OXIDATION; MOLECULES AB A praseodymium oxide thin-film was deposited on Ru(0 0 0 1) by vapor depositing Pr in 2 x 10(-7) Torr O-2 while the Ru was at 700 K. The film was approximately 5 nm thick and did not produce a LEED pattern. The adsorption and reaction of CO and C2H4 adsorbed on Rh supported on the PrOX film were studied by TPD and SXPS. The CO initially reacted with oxygen in the substrate to produce CO2. After this oxygen was removed, the CO adsorbed non-dissociatively in a manner similar to what is seen on Rh(1 1 1). C2H4 adsorbed on the Rh particles and underwent progressive dehydrogenation to produce H, during TPD. The C from the C2H4 reacted with the O in PrOX to produce CO. CO dissociation on the Rh particles could be promoted by reducing the PrOK with C2H4 before CO exposure. The CO dissociation occurred over a narrow range of Pr reduction and occurred only at high degrees of reduction. No CO dissociation was seen for films with a Pr3+ content of up to 50%. Extensive treatment in C2H4 poisoned subsequent CID adsorption due to the build-up of C on the Rh particles. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Div Chem, Oak Ridge, TN 37831 USA. RP Mullins, DR (reprint author), Oak Ridge Natl Lab, Div Chem, POB 2008,MS 6201, Oak Ridge, TN 37831 USA. EM mullinsdr@ornl.gov NR 29 TC 12 Z9 12 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAY 10 PY 2004 VL 556 IS 2-3 BP 159 EP 170 DI 10.1016/j.susc.2004.03.011 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 819BK UT WOS:000221288000009 ER PT J AU Grant, DJ Hall, IJ Eastmond, DA Jones, IA Bell, DA AF Grant, DJ Hall, IJ Eastmond, DA Jones, IA Bell, DA TI Bilirubin UDP-glucuronosyltransferase 1A1 (UGT1A1) gene promoter polymorphisms and HPRT, glycophorin A, and micronuclei mutant frequencies in human blood SO MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS LA English DT Article DE UGT1A1; genotypes; repeat polymorphisms; somatic mutation; HPRT; glycophorin A; micronuclei ID OXIDATIVE DNA-DAMAGE; UDP-GLUCURONOSYLTRANSFERASE; GILBERTS-SYNDROME; HUMAN-LYMPHOCYTES; NEGATIVE MICRONUCLEI; MISSENSE MUTATION; AFRICAN-AMERICANS; HUMAN FIBROBLASTS; CANCER-PATIENTS; ANTIOXIDANT AB A dinucleotide repeat polymorphism (5-, 6-, 7-, or 8-TA units) has been identified within the promoter region of UDP-glucuronosyltransferase 1A1 (UGT1A1) gene. The 7-TA repeat allele has been associated with elevated serum bilirubin levels that cause a mild hyperbilirubinemia (Gilbert's syndrome). Studies suggest that promoter transcriptional activity of UGT1A1 is inversely related to the number of TA repeats, and that unconjugated bilirubin concentration increases directly with the number of TA repeat elements. Because bilirubin is a known antioxidant, we hypothesized that UGT1A1 repeats associated with higher bilirubin may be protective against oxidative damage. We examined the effect of UGT1A1 genotype on somatic mutant frequency in the hypoxanthine-guanine phosphoribosyl-transferase (HPRT) gene in human lymphocytes and the glycophorin A (GPA) gene of red blood cells (both NO, NN mutants), and the frequency of lymphocyte micronuclei (both kinetochore (K)-positive or micronuclei K-negative) in 10 1 healthy smoking and nonsmoking individuals. As hypothesized, genotypes containing 7- and 8-TA displayed marginally lower GPA_NN mutant frequency relative to 5/5, 5/6, 6/6 genotypes (P < 0.05). In contrast, our analysis showed that lower expressing UGT1A1 alleles (7- and 8-TA) were associated with modestly increased HPRT mutation frequency (P < 0.05), while the same low-expression genotypes were not significantly associated with micronuclei frequencies (K-positive or K-negative) when compared to high-expression genotypes (5- and 6-TA). We found weak evidence that UGT1A1 genotypes containing 7- and 8-TA were associated with increased GPA_Ncircle divide mutant frequency relative to 515, 5/6, 6/6 genotypes (P < 0.05). These data suggest that UGT1A1 genotype may modulate somatic mutation of some types, in some cell lineages, by a mechanism not involving bilirubin antioxidant activity. More detailed studies examining UGT1A1 promoter variation, oxidant/antioxidant balance and genetic damage will be needed. (C) 2004 Elsevier B.V. All rights reserved. C1 NIEHS, Environm Genom Sect, Lab Computat Biol & Risk Assessment, Res Triangle Pk, NC 27709 USA. N Carolina Cent Univ, Canc Res Program, JLC Biomed Biotechnol Res Inst, Durham, NC USA. Ctr Dis Control & Prevent, Div Canc Prevent & Control, Natl Ctr Chron Dis Prevent & Hlth Promot, Atlanta, GA USA. Univ Calif Riverside, Environm Toxicol Grad Program, Riverside, CA 92521 USA. Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA USA. RP Bell, DA (reprint author), NIEHS, Environm Genom Sect, Lab Computat Biol & Risk Assessment, POB 12233,C3-03,POB 12233, Res Triangle Pk, NC 27709 USA. EM bell1@niehs.nih.gov NR 46 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1383-5718 J9 MUTAT RES-GEN TOX EN JI Mutat. Res. Genet. Toxicol. Environ. Mutagen. PD MAY 9 PY 2004 VL 560 IS 1 BP 1 EP 10 DI 10.1016/j.mrgentox.2004.01.010 PG 10 WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology GA 818NM UT WOS:000221251800001 PM 15099818 ER PT J AU Tawada, Y Tsuneda, T Yanagisawa, S Yanai, T Hirao, K AF Tawada, Y Tsuneda, T Yanagisawa, S Yanai, T Hirao, K TI A long-range-corrected time-dependent density functional theory SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID KOHN-SHAM THEORY; GENERALIZED-GRADIENT-APPROXIMATION; EXCHANGE-CORRELATION POTENTIALS; MOLECULAR-ORBITAL METHODS; EXCITATION-ENERGIES; EXCITED-STATES; BASIS-SETS; ASYMPTOTIC-BEHAVIOR; CLUSTER-EXPANSION; SPECTRA AB We apply the long-range correction (LC) scheme for exchange functionals of density functional theory to time-dependent density functional theory (TDDFT) and examine its efficiency in dealing with the serious problems of TDDFT, i.e., the underestimations, of Rydberg excitation energies, oscillator strengths, and charge-transfer excitation energies. By calculating vertical excitation energies of typical molecules, it was found that LC-TDDFT gives accurate excitation energies, within an error of 0.5 eV, and reasonable oscillator strengths, while TDDFT employing a pure functional provides 1.5 eV lower excitation energies and two orders of magnitude lower oscillator strengths for the Rydberg excitations. It was also found that LC-TDDFT clearly reproduces the correct asymptotic behavior of the charge-transfer excitation energy of ethylene-tetrafluoroethylene dimer for the long intramolecular distance, unlike a conventional far-nucleus asymptotic correction scheme. It is, therefore, presumed that poor TDDFT results for pure functionals may be due to their lack of a long-range orbital-orbital interaction. (C) 2004 American Institute of Physics. C1 Univ Tokyo, Grad Sch Engn, Dept Appl Chem, Tokyo 1138656, Japan. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Tawada, Y (reprint author), Univ Tokyo, Grad Sch Engn, Dept Appl Chem, Tokyo 1138656, Japan. EM tune@qcl.t.u-tokyo.ac.jp RI Yanagisawa, Susumu/A-9928-2013; Tsuneda, Takao/H-2363-2014; Hirao, Kimihiko/N-5483-2015 OI Yanagisawa, Susumu/0000-0002-2800-8050; Tsuneda, Takao/0000-0002-0249-5276; NR 44 TC 1001 Z9 1002 U1 9 U2 131 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 8 PY 2004 VL 120 IS 18 BP 8425 EP 8433 DI 10.1063/1.1688752 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 819EY UT WOS:000221298500012 PM 15267767 ER PT J AU Hoops, AA Gascooke, JR Kautzman, KE Faulhaber, AE Neumark, DM AF Hoops, AA Gascooke, JR Kautzman, KE Faulhaber, AE Neumark, DM TI Photodissociation spectroscopy and dynamics of the CH2CFO radical SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LASER-INDUCED FLUORESCENCE; FLIGHT MASS-SPECTROMETER; SUPERSONIC FREE JET; GAS-PHASE; ELEMENTARY REACTIONS; CHEMICAL KINETICS; FAST BEAM; 193 NM; DISSOCIATION; STATE AB The photodissociation spectroscopy and dynamics resulting from excitation of the (B) over tilde (2)A"<--(X) over tilde (2)A" transition of CH2CFO have been examined using fast beam photofragment translational spectroscopy. The photofragment yield spectrum reveals vibrationally resolved structure between 29 870 and 38 800 cm(-1), extending similar to6000 cm(-1) higher in energy than previously reported in a laser-induced fluorescence excitation spectrum. At all photon energies investigated, only the CH2F+CO and HCCO+HF fragment channels are observed. Both product channels yield photofragment translational energy distributions that are characteristic of a decay mechanism with a barrier to dissociation. Using the barrier impulsive model, it is shown that fragmentation to CH2F+ CO products occurs on the ground state potential energy surface with the isomerization barrier between CH2CFO and CH2FCO governing the observed translational energy distributions. (C) 2004 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Labs, Div Chem Sci, Berkeley, CA 94720 USA. RP Neumark, DM (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM dan@radon.cchem.berkeley.edu RI Neumark, Daniel/B-9551-2009; OI Neumark, Daniel/0000-0002-3762-9473; Gascooke, Jason/0000-0002-3236-2247 NR 50 TC 7 Z9 7 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 8 PY 2004 VL 120 IS 18 BP 8494 EP 8504 DI 10.1063/1.1691016 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 819EY UT WOS:000221298500020 PM 15267775 ER PT J AU Glab, WL Pratt, ST AF Glab, WL Pratt, ST TI Ion rotationall distributions following vibrational autoionization of the Rydberg states of water SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID QUANTUM DEFECT THEORY; PHOTOELECTRON-SPECTROSCOPY; MULTIPHOTON IONIZATION; POLYATOMIC-MOLECULES; H2O; PHOTOIONIZATION; RESOLUTION; SPECTRUM; DYNAMICS; AMMONIA AB Double-resonance laser excitation and high-resolution energy dispersive photoelectron spectroscopy were used to determine the ionic rotational-state distributions following vibrational autoionization of Rydberg states of water having principal quantum number n = 8-10 and converging to the (X) over tilde B-2(1) (1,0,0) state of H2O+. Where possible, these states were identified by comparison with results of a calculation based on multichannel quantum defect theory. Symmetry and angular momentum constraints link the observed ionic rotational states to particular values of the orbital angular momentum of the Rydberg electron, E, and to the partial-wave composition of the ejected electron. In particular, this connection allows an unambiguous determination of the even or odd character of the partial waves and provides a test of the predicted character of the autoionizing resonances. The effects of l mixing induced by the nonspherical nature of the ionic field are plainly evident in the ion distributions. The present results also allow a tentative assignment of some resonances to the previously unidentified np Rydberg states. (C) 2004 American Institute of Physics. C1 Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Glab, WL (reprint author), Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA. NR 26 TC 3 Z9 3 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 8 PY 2004 VL 120 IS 18 BP 8555 EP 8566 DI 10.1063/1.1701718 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 819EY UT WOS:000221298500027 PM 15267782 ER PT J AU Zhao, XC Johnson, JK Rasmussen, CE AF Zhao, XC Johnson, JK Rasmussen, CE TI Surface tension of quantum fluids from molecular simulations SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LIQUID-VAPOR INTERFACE; LENNARD-JONES FLUID; DYNAMICS SIMULATION; COMPUTER-SIMULATION; HE-3-HE-4 MIXTURES; PHASE-EQUILIBRIUM; PURE FLUIDS; PREDICTION; SYSTEMS; ALGORITHMS AB We present the first molecular simulations of the vapor-liquid surface tension of quantum,liquids. The path integral formalism of Feynman was used to account for the quantum mechanical behavior of both the liquid and the vapor. A replica-data parallel algorithm was implemented to achieve good parallel performance of the simulation code on at least 32 processors. We have computed the surface tension and the vapor-liquid phase diagram of pure hydrogen over the temperature range 18-30 K and pure deuterium from 19 to 34 K. The simulation results for surface tension and vapor-liquid orthobaric densities are in very good agreement with experimental data. We have computed the interfacial properties of hydrogen-deuterium mixtures over the entire concentration range at 20.4 and 24 K. The calculated equilibrium compositions of the mixtures are in excellent agreement with experimental data. The computed mixture surface tension shows negative deviations from ideal solution behavior,,in agreement with experimental data and predictions from Prigogine's theory. The magnitude of the deviations at 20.4 K are substantially larger from simulations and from theory than from experiments. We conclude that the experimentally measured mixture surface tension values are systematically too high. Analysis of the concentration profiles in the interfacial region shows that the nonideal behavior can be described entirely by segregation of H-2 to the interface, indicating that H-2 acts as a surfactant in H-2-D-2 mixtures. (C) 2004 American Institute of Physics. C1 Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Los Alamos Natl Lab, Adv Comp Lab, Los Alamos, NM 87545 USA. RP Zhao, XC (reprint author), Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. EM karlj@pitt.edu RI Johnson, Karl/E-9733-2013 OI Johnson, Karl/0000-0002-3608-8003 NR 60 TC 8 Z9 8 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 8 PY 2004 VL 120 IS 18 BP 8707 EP 8715 DI 10.1063/1.1695317 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 819EY UT WOS:000221298500046 PM 15267801 ER PT J AU Gosling, JT de Koning, CA Skoug, RM Steinberg, JT McComas, DJ AF Gosling, JT de Koning, CA Skoug, RM Steinberg, JT McComas, DJ TI Dispersionless modulations in low-energy solar electron bursts and discontinuous changes in the solar wind electron strahl SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article DE solar electron bursts; solar wind electron strahl; dispersionless modulations; foot point; motions; ACE ID HEAT-FLUX DROPOUTS; MAGNETIC-FIELD; STREAM INTERFACES; PROPAGATION; PARTICLES; EVENTS; ULYSSES; SHEET; AU AB The solar wind experiment on the Advanced Composition Explorer ( ACE) has detected at least 328 impulsive solar electron bursts that exhibited energy and angle dispersion at onset at energies below 1.4 keV in the interval from 1 January 1998 through 30 September 2003. Discontinuous, dispersionless modulations in burst intensity and pitch angle occurred in a subset of these events. These dispersionless modulations were similar to discontinuous modulations in the solar wind electron strahl intensity often observed at these same energies at other times. During the bursts themselves, dispersionless modulations in burst intensity commonly, but not always, were associated with discontinuous changes in the underlying strahl intensity. At times the burst intensity modulations were correlated with the strahl modulations and at times they were anticorrelated with the strahl modulations. We find that the variety of types of dispersionless burst/strahl modulations observed within low-energy solar electron bursts can largely be explained in terms of a simple model that assumes spatially limited burst source regions, a strahl intensity that varies with coronal magnetic connection point, and magnetic field line foot point motions in the solar atmosphere during the 2-4 days it takes solar wind plasma and the embedded heliospheric magnetic field to travel from the Sun to 1 AU. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. SW Res Inst, Space Sci & Engn Div, San Antonio, TX 78228 USA. RP Gosling, JT (reprint author), Los Alamos Natl Lab, MS D466, Los Alamos, NM 87545 USA. EM jgosling@lanl.gov; dekoning@lanl.gov; rskoug@lanl.gov; jsteinberg@lanl.gov; dmccomas@swri.edu NR 33 TC 25 Z9 25 U1 1 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD MAY 8 PY 2004 VL 109 IS A5 AR A05102 DI 10.1029/2003JA010338 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 819SI UT WOS:000221334900002 ER PT J AU Song, YJ Challa, SR Medforth, CJ Qiu, Y Watt, RK Pena, D Miller, JE van Swol, F Shelnutt, JA AF Song, YJ Challa, SR Medforth, CJ Qiu, Y Watt, RK Pena, D Miller, JE van Swol, F Shelnutt, JA TI Synthesis of peptide-nanotube platinum-nanoparticle composites SO CHEMICAL COMMUNICATIONS LA English DT Article ID ASSEMBLING ORGANIC NANOTUBES; ISLET AMYLOID POLYPEPTIDE; ARCHITECTURE; SIMULATION; SYSTEMS AB Nanotubes prepared by the self-assembly Of D-Phe-D-Phe molecules are investigated by electron microscopy and Monte Carlo simulations; the nanotubes appear to be porous and are capable of forming novel peptide-nanotube platinum-nanoparticle composites. C1 Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA. Univ New Mexico, Dept Chem, Albuquerque, NM 87131 USA. Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. Univ Georgia, Dept Chem, Athens, GA 30602 USA. RP Shelnutt, JA (reprint author), Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA. EM jasheln@unm.edu RI Song, Yujiang/A-8700-2009; Shelnutt, John/A-9987-2009; Miller, James/C-1128-2011; Medforth, Craig/D-8210-2013; REQUIMTE, FMN/M-5611-2013; REQUIMTE, UCIBIO/N-9846-2013 OI Shelnutt, John/0000-0001-7368-582X; Miller, James/0000-0001-6811-6948; Medforth, Craig/0000-0003-3046-4909; NR 20 TC 161 Z9 163 U1 5 U2 72 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1359-7345 J9 CHEM COMMUN JI Chem. Commun. PD MAY 7 PY 2004 IS 9 BP 1044 EP 1045 DI 10.1039/b402126f PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 822XM UT WOS:000221574100014 PM 15116176 ER PT J AU Chamblin, A AF Chamblin, A TI Twistors and holography SO CLASSICAL AND QUANTUM GRAVITY LA English DT Article ID CAUSAL RELATIONS; LINKING AB We extend Bousso's notion of a lightsheet, a surface where entropy can be defined in a way such that the entropy bound is satisfied, to more general surfaces. Intuitively, these surfaces may be regarded as deformations of the Bousso choice; in general, these deformations will be timelike and so we refer to them as 'timesheets'. We show that a timesheet corresponds to a section of a certain twistor bundle over a given spacelike 2-surface B. We further argue that increasing the entropy flux through a given region of spacetime corresponds to increasing the volume of certain regions in twistor space. Put another way, it would seem that entropy in spacetime corresponds to volume in twistor space. We argue that this formulation may point a way towards a version of the covariant entropy bound which allows for quantum fluctuations of the lightsheet. We also point out that in twistor space, it might be possible to give a purely topological characterization of a lightsheet, at least for suitably simple spacetimes. C1 Los Alamos Natl Lab, Theory Div, Los Alamos, NM 87545 USA. Univ Louisville, Dept Phys, Louisville, KY USA. RP Chamblin, A (reprint author), Los Alamos Natl Lab, Theory Div, POB 1663, Los Alamos, NM 87545 USA. EM chamblin@prancer.physics.louisville.edu NR 23 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0264-9381 J9 CLASSICAL QUANT GRAV JI Class. Quantum Gravity PD MAY 7 PY 2004 VL 21 IS 9 BP 2333 EP 2338 AR PII S0264-9381(04)74887-X DI 10.1088/0264-9381/21/9/009 PG 6 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 825CV UT WOS:000221734500010 ER PT J AU Ben-Naim, E Krapivsky, PL AF Ben-Naim, E Krapivsky, PL TI Unicyclic components in random graphs SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID LINEAR DIFFERENTIAL EQUATIONS; INFINITE SET; CENSUS; COAGULATION; AGGREGATION; GELATION; SYSTEMS AB The distribution of unicyclic components in a random graph is obtained analytically. The number of unicyclic components of a given size approaches a self-similar form in the vicinity of the gelation transition. At the gelation point, this distribution decays algebraically, U-k similar or equal to (4k)(-1) for k much greater than 1. As a result, the total number of unicyclic components grows logarithmically with the system size. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Boston Univ, Ctr Polymer Studies, Boston, MA 02215 USA. Boston Univ, Dept Phys, Boston, MA 02215 USA. RP Ben-Naim, E (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Ben-Naim, Eli/C-7542-2009; Krapivsky, Pavel/A-4612-2014 OI Ben-Naim, Eli/0000-0002-2444-7304; NR 30 TC 9 Z9 9 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD MAY 7 PY 2004 VL 37 IS 18 BP L189 EP L195 AR PII S0305-4470(04)78037-3 DI 10.1088/0305-4470/37/18/L01 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 833CR UT WOS:000222314500001 ER PT J AU Cho, JY Sohn, YS Gutowska, A Jeong, B AF Cho, JY Sohn, YS Gutowska, A Jeong, B TI Thermosensitive PEGylated polypeptides SO MACROMOLECULAR RAPID COMMUNICATIONS LA English DT Article DE biodegradable; drug delivery systems; nanoparticles; peptides; thermal properties ID POLY(N-ISOPROPYLACRYLAMIDE); TEMPERATURE; HYDROGELS; WATER; PH; COPOLYMERS; POLYMERS; PROTEINS AB We report a thermosensitive polypeptide consisting of hydrophilic poly(ethylene glycol)s and hydrophobic phenyl alanine ethyl esters. It is soluble in most solvents 0 C and undergoes a micelle (radius approximate to 10 nm) to nanoparticle (radius approximate to 100 nm) transition in water as the temperature increases. The transition temperature could be controlled to E between 30 and 40degreesC by varying the number of poly(ethylene glycol) grafts. This system might be promising for advanced drug delivery. C1 Ewha Womans Univ, Dept Chem, Div Nanosci, Seoul 120750, South Korea. PNNL, Richland, WA 99352 USA. RP Jeong, B (reprint author), Ewha Womans Univ, Dept Chem, Div Nanosci, Seoul 120750, South Korea. EM bjeong@ewha.ac.kr NR 21 TC 18 Z9 19 U1 0 U2 6 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1022-1336 J9 MACROMOL RAPID COMM JI Macromol. Rapid Commun. PD MAY 7 PY 2004 VL 25 IS 9 BP 964 EP 967 DI 10.1002/marc.200300318 PG 4 WC Polymer Science SC Polymer Science GA 821FA UT WOS:000221444600011 ER PT J AU Jung, YS Head-Gordon, M AF Jung, YS Head-Gordon, M TI What is the nature of the long bond in the TCNE22- pi-dimer? SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE; 2-ELECTRON AB The TCNE22- pi-dimer has many of the characteristics of a chemical bond despite its remarkably long (2.9 Angstrom) C-C bondlength, as it exists in crystalline solids. Using computational methods, we examine the nature of this long bond by obtaining potential energy curves that are, for the first time, in satisfactory agreement with recent experiments. We find that the unusually long C-C bond observed in pi-TCNE22- dimers is in fact an outcome of significant dispersion attractions between the two cofacial monomers, as well as their (partial) intradimer pi-bonding interactions. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Head-Gordon, M (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM mhg@bastille.cchem.berkeley.edu RI Jung, Yousung/D-1676-2010 OI Jung, Yousung/0000-0003-2615-8394 NR 16 TC 78 Z9 79 U1 1 U2 2 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PD MAY 7 PY 2004 VL 6 IS 9 BP 2008 EP 2011 DI 10.1039/b403450c PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 827FW UT WOS:000221886100017 ER PT J AU Striebel, F Jusinski, LE Fahr, A Halpern, JB Klippenstein, SJ Taatjes, CA AF Striebel, F Jusinski, LE Fahr, A Halpern, JB Klippenstein, SJ Taatjes, CA TI Kinetics of the reaction of vinyl radicals with NO: Ab initio theory, master equation predictions, and laser absorption measurements SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID QUADRATIC CONFIGURATION-INTERACTION; NITRIC-OXIDE; THEORETICAL-ANALYSIS; ELECTRONIC-STRUCTURE; MOLECULAR-OXYGEN; ACETYLENE; THERMOCHEMISTRY; SPECTROSCOPY; SPECTRUM; ETHYL AB The pulsed laser photolysis/cw laser absorption technique is used to investigate the reaction of vinyl (C2H3) with NO in the temperature range from 295 to 700 K and pressures from 10 to 320 Torr (1.33 to 42.6 kPa). Vinyl radicals are generated by photolysis of vinyl iodide at 266 nm and detected by visible laser absorption in a vibronic band of the ((A) over tilde <-- X) transition near 403 rim. The potential energy surface is explored with both quadratic configuration interaction and multi-reference configuration interaction ab initio calculations. These ab initio predictions are employed in RRKM theory based master equation simulations of the temperature and pressure dependent kinetics. At room temperature, the overall rate constant for removal of vinyl radical by NO is measured to be 1.6+/-0.4 x 10(-11) cm(3) molecule(-1) s(-1), with negligible pressure dependence from 10 Torr (1.33 kPa) to 160 Torr (21.3 kPa) of helium. At constant pressure the rate constant decreases rapidly with temperature. At higher temperatures, a falloff of the rate constant to lower pressure is observed. The ab initio characterizations suggest a significant contribution from HCN + CH2O formation, with both isomerization transition states for the pathway leading to this product lying similar to15 kcal mol(-1) (63 kJ mol(-1)) below the entrance channel. The master equation analysis provides a reasonably satisfactory reproduction of the observed kinetic data. The HCN + CH2O bimolecular channel, which proceeds from the addition complex through tight ring forming and opening transition states, has a negative temperature dependence and is the dominant channel for pressures of about 50 Torr (6.7 kPa) and lower. The theoretically predicted zero pressure rate coefficient is reproduced by the modified Arrhenius expression 5.02 x 10(-11)(T/298)(-3.382)exp(-516.3/T) cm(3) molecule(-1) s(-1) (with T in K). C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. NIST, Phys & Chem Properties Div, Gaithersburg, MD 20899 USA. Howard Univ, Dept Chem, Washington, DC 20059 USA. Howard Univ, Ctr Study Terr & Extraterr Atmospheres, Washington, DC 20059 USA. RP Klippenstein, SJ (reprint author), Sandia Natl Labs, Combust Res Facil, Mail Stop 9055, Livermore, CA 94551 USA. EM sjklipp@sandia.gov; cataatj@sandia.gov OI Klippenstein, Stephen/0000-0001-6297-9187 NR 43 TC 16 Z9 16 U1 1 U2 7 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PD MAY 7 PY 2004 VL 6 IS 9 BP 2216 EP 2223 DI 10.1039/b401163e PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 827FW UT WOS:000221886100044 ER PT J AU Weber, R Benmore, CJ Siewenie, J Urquidi, J Key, TS AF Weber, R Benmore, CJ Siewenie, J Urquidi, J Key, TS TI Structure and bonding in single- and two-phase alumina-based glasses SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID NEUTRON-DIFFRACTION; POLYAMORPHISM; TRANSITION; PRESSURE; DENSITY; LIQUIDS; OXIDES; GARNET AB Pulsed neutron and high energy X-ray diffraction experiments on single- and two-phase Al2O3-Y2O3 and single-phase Al2O3-La2O3 glasses suggest that a polyamorphic phase transition occurs via changes in the Y-O coordination and connectivity. The transformation from a high temperature to a low temperature amorphous phase is mainly associated with the formation of YO8 polyhedra at the expense Of YO7 polyhedra. The transition produces a more ordered network structure with increased oxygen connectivity, while maintaining the overall metal:oxygen stoichiometry. It is estimated that for the two-phase sample studied similar to12% of the Y ions had transformed to the higher coordinate form in the supercooled liquid as the onset of the glass transition was reached. C1 Containerless Res Inc, Evanston, IL 60201 USA. Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Weber, R (reprint author), Containerless Res Inc, 906 Univ Pl, Evanston, IL 60201 USA. EM weber@containerless.com; benmore@anl.gov OI Benmore, Chris/0000-0001-7007-7749 NR 22 TC 18 Z9 18 U1 0 U2 5 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PD MAY 7 PY 2004 VL 6 IS 9 BP 2480 EP 2483 DI 10.1039/b314957a PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 827FW UT WOS:000221886100083 ER PT J AU Adams, J Adler, C Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhatia, VS Bichsel, H Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, A Bravar, A Cadman, RV Cai, XZ Caines, H Sanchez, MCD Carroll, J Castillo, J Cebra, D Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Dutta Mazumdar, MR Eckardt, V Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Flierl, D Foley, KJ Fomenko, K Fu, J Gagliardi, CA Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Gronstal, S Grosnick, D Guertin, SM Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, E Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Klyachko, A Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kunz, CL Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Lansdell, CL Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Milosevich, Z Minaev, NG Mironov, C Mischke, A Mishra, D Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Morozov, V Munhoz, MG Nandi, BK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rai, G Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Ruan, L Sakrejda, I Salur, S Sandweiss, J Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schroeder, LS Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B St Claire, L Stadnik, A Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Struck, C Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, O Ullrich, T Underwood, DG Urkinbaev, A Van Buren, G Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, VP Vokal, S Vznuzdaev, M Waggoner, B Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, Z Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, ZP Zolnierczuk, PA Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN AF Adams, J Adler, C Aggarwal, MM Ahammed, Z Amonett, J Anderson, BD Arkhipkin, D Averichev, GS Bai, Y Balewski, J Barannikova, O Barnby, LS Baudot, J Bekele, S Belaga, VV Bellwied, R Berger, J Bezverkhny, BI Bharadwaj, S Bhatia, VS Bichsel, H Bland, LC Blyth, CO Bonner, BE Botje, M Boucham, A Brandin, A Bravar, A Cadman, RV Cai, XZ Caines, H Sanchez, MCD Carroll, J Castillo, J Cebra, D Chaloupka, P Chattopdhyay, S Chen, HF Chen, Y Cheng, J Cherney, M Chikanian, A Christie, W Coffin, JP Cormier, TM Cramer, JG Crawford, HJ Das, D Das, S de Moura, MM Derevschikov, AA Didenko, L Dietel, T Dong, WJ Dong, X Draper, JE Du, F Dubey, AK Dunin, VB Dunlop, JC Dutta Mazumdar, MR Eckardt, V Efimov, LG Emelianov, V Engelage, J Eppley, G Erazmus, B Estienne, M Fachini, P Faivre, J Fatemi, R Fedorisin, J Filimonov, K Filip, P Finch, E Fine, V Fisyak, Y Flierl, D Foley, KJ Fomenko, K Fu, J Gagliardi, CA Gans, J Ganti, MS Gaudichet, L Geurts, F Ghazikhanian, V Ghosh, P Gonzalez, JE Grachov, O Grebenyuk, O Gronstal, S Grosnick, D Guertin, SM Gupta, A Gutierrez, TD Hallman, TJ Hamed, A Hardtke, D Harris, JW Heinz, M Henry, TW Hepplemann, S Hippolyte, B Hirsch, A Hjort, E Hoffmann, GW Huang, HZ Huang, SL Hughes, E Humanic, TJ Igo, G Ishihara, A Jacobs, P Jacobs, WW Janik, M Jiang, H Jones, PG Judd, EG Kabana, S Kang, K Kaplan, M Keane, D Khodyrev, VY Kiryluk, J Kisiel, A Kislov, EM Klay, J Klein, SR Klyachko, A Koetke, DD Kollegger, T Kopytine, M Kotchenda, L Kramer, M Kravtsov, P Kravtsov, VI Krueger, K Kuhn, C Kulikov, AI Kumar, A Kunz, CL Kutuev, RK Kuznetsov, AA Lamont, MAC Landgraf, JM Lange, S Lansdell, CL Laue, F Lauret, J Lebedev, A Lednicky, R Lehocka, S LeVine, MJ Li, C Li, Q Li, Y Lindenbaum, SJ Lisa, MA Liu, F Liu, L Liu, QJ Liu, Z Ljubicic, T Llope, WJ Long, H Longacre, RS Lopez-Noriega, M Love, WA Ludlam, T Lynn, D Ma, GL Ma, JG Ma, YG Magestro, D Mahajan, S Mahapatra, DP Majka, R Mangotra, LK Manweiler, R Margetis, S Markert, C Martin, L Marx, JN Matis, HS Matulenko, YA McClain, CJ McShane, TS Meissner, F Melnick, Y Meschanin, A Miller, ML Milosevich, Z Minaev, NG Mironov, C Mischke, A Mishra, D Mitchell, J Mohanty, B Molnar, L Moore, CF Mora-Corral, MJ Morozov, DA Morozov, V Munhoz, MG Nandi, BK Nayak, TK Nelson, JM Netrakanti, PK Nikitin, VA Nogach, LV Norman, B Nurushev, SB Odyniec, G Ogawa, A Okorokov, V Oldenburg, M Olson, D Pal, SK Panebratsev, Y Panitkin, SY Pavlinov, AI Pawlak, T Peitzmann, T Perevoztchikov, V Perkins, C Peryt, W Petrov, VA Phatak, SC Picha, R Planinic, M Pluta, J Porile, N Porter, J Poskanzer, AM Potekhin, M Potrebenikova, E Potukuchi, BVKS Prindle, D Pruneau, C Putschke, J Rai, G Rakness, G Raniwala, R Raniwala, S Ravel, O Ray, RL Razin, SV Reichhold, D Reid, JG Renault, G Retiere, F Ridiger, A Ritter, HG Roberts, JB Rogachevskiy, OV Romero, JL Rose, A Ruan, L Sakrejda, I Salur, S Sandweiss, J Savin, I Sazhin, PS Schambach, J Scharenberg, RP Schmitz, N Schroeder, LS Schweda, K Seger, J Seyboth, P Shahaliev, E Shao, M Shao, W Sharma, M Shen, WQ Shestermanov, KE Shimanskiy, SS Simon, F Singaraju, RN Skoro, G Smirnov, N Snellings, R Sood, G Sorensen, P Sowinski, J Speltz, J Spinka, HM Srivastava, B St Claire, L Stadnik, A Stock, R Stolpovsky, A Strikhanov, M Stringfellow, B Struck, C Suaide, AAP Sugarbaker, E Suire, C Sumbera, M Surrow, B Symons, TJM de Toledo, AS Szarwas, P Tai, A Takahashi, J Tang, AH Thein, D Thomas, JH Timoshenko, S Tokarev, M Trainor, TA Trentalange, S Tribble, RE Tsai, O Ullrich, T Underwood, DG Urkinbaev, A Van Buren, G Vander Molen, AM Varma, R Vasilevski, IM Vasiliev, AN Vernet, R Vigdor, SE Viyogi, VP Vokal, S Vznuzdaev, M Waggoner, B Wang, F Wang, G Wang, G Wang, XL Wang, Y Wang, Y Wang, ZM Ward, H Webb, JC Wells, R Westfall, GD Wetzler, A Whitten, C Wieman, H Wissink, SW Witt, R Wood, J Wu, J Xu, N Xu, Z Xu, Z Yamamoto, E Yepes, P Yurevich, VI Zanevsky, YV Zhang, H Zhang, ZP Zolnierczuk, PA Zoulkarneev, R Zoulkarneeva, Y Zubarev, AN CA STAR Collaboration TI Multistrange baryon production in Au-Au collisions at root s(NN)=130 GeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRANGENESS PRODUCTION; PARTICLE RATIOS; EQUILIBRATION; SPS AB The transverse mass spectra and midrapidity yields for Xis and Omegas are presented. For the 10% most central collisions, the (Xi) over bar (+)/h(-) ratio increases from the Super Proton Synchrotron to the Relativistic Heavy Ion Collider energies while the Xi(-)/h(-) stays approximately constant. A hydrodynamically inspired model fit to the Xi spectra, which assumes a thermalized source, seems to indicate that these multistrange particles experience a significant transverse flow effect, but are emitted when the system is hotter and the flow is smaller than values obtained from a combined fit to pi, K, p, and Lambdas. C1 Univ Birmingham, Birmingham, W Midlands, England. Argonne Natl Lab, Argonne, IL 60439 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. CALTECH, Pasadena, CA 91125 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Creighton Univ, Omaha, NE 68178 USA. Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic. Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia. Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia. Goethe Univ Frankfurt, D-6000 Frankfurt, Germany. Inst Phys, Bhubaneswar 751005, Orissa, India. Indian Inst Technol, Bombay 400076, Maharashtra, India. Indiana Univ, Bloomington, IN 47408 USA. Inst Rech Subatom, Strasbourg, France. Univ Jammu, Jammu 180001, India. Kent State Univ, Kent, OH 44242 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. MIT, Cambridge, MA 02139 USA. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. Michigan State Univ, E Lansing, MI 48824 USA. Moscow Engn Phys Inst, Moscow 115409, Russia. CUNY City Coll, New York, NY 10031 USA. NIKHEF H, NL-1009 DB Amsterdam, Netherlands. Ohio State Univ, Columbus, OH 43210 USA. Panjab Univ, Chandigarh 160014, India. Penn State Univ, University Pk, PA 16802 USA. Inst High Energy Phys, Protvino, Russia. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rajasthan, Jaipur 302004, Rajasthan, India. Rice Univ, Houston, TX 77251 USA. Univ Sao Paulo, Sao Paulo, Brazil. Univ Sci & Technol China, Hefei 230027, Anhui, Peoples R China. Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. SUBATECH, Nantes, France. Texas A&M Univ, College Stn, TX 77843 USA. Univ Texas, Austin, TX 78712 USA. Tsinghua Univ, Beijing 100084, Peoples R China. Valparaiso Univ, Valparaiso, IN 46383 USA. Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India. Warsaw Univ Technol, Warsaw, Poland. Univ Washington, Seattle, WA 98195 USA. Wayne State Univ, Detroit, MI 48201 USA. HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China. Yale Univ, New Haven, CT 06520 USA. Univ Zagreb, HR-10002 Zagreb, Croatia. RP Adams, J (reprint author), Univ Birmingham, Birmingham, W Midlands, England. RI Chaloupka, Petr/E-5965-2012; Suaide, Alexandre/L-6239-2016; Peitzmann, Thomas/K-2206-2012; Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Planinic, Mirko/E-8085-2012; Chen, Yu/E-3788-2012; Takahashi, Jun/B-2946-2012; Barnby, Lee/G-2135-2010; Castillo Castellanos, Javier/G-8915-2013; Mischke, Andre/D-3614-2011; Witt, Richard/H-3560-2012; Skoro, Goran/F-3642-2010; Lednicky, Richard/K-4164-2013; Sumbera, Michal/O-7497-2014; Skoro, Goran/P-1229-2014; Strikhanov, Mikhail/P-7393-2014; Kisiel, Adam/O-8754-2015 OI Suaide, Alexandre/0000-0003-2847-6556; Peitzmann, Thomas/0000-0002-7116-899X; Okorokov, Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900; Grachov, Oleg/0000-0002-4294-9025; Takahashi, Jun/0000-0002-4091-1779; Barnby, Lee/0000-0001-7357-9904; Castillo Castellanos, Javier/0000-0002-5187-2779; Sumbera, Michal/0000-0002-0639-7323; Skoro, Goran/0000-0001-7745-9045; Strikhanov, Mikhail/0000-0003-2586-0405; Kisiel, Adam/0000-0001-8322-9510 NR 35 TC 140 Z9 142 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 182301 DI 10.1103/PhysRevLett.92.182301 PG 6 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900015 PM 15089460 ER PT J AU Ahmed, SN Anthony, AE Beier, EW Bellerive, A Biller, SD Boger, J Boulay, MG Bowler, MG Bowles, TJ Brice, SJ Bullard, TV Chan, YD Chen, M Chen, X Cleveland, BT Cox, GA Dai, X Dalnoki-Veress, F Doe, PJ Dosanjh, RS Doucas, G Dragowsky, MR Duba, CA Duncan, FA Dunford, M Dunmore, JA Earle, ED Elliott, SR Evans, HC Ewan, GT Farine, J Fergani, H Fleurot, F Formaggio, JA Fowler, MM Frame, K Fulsom, BG Gagnon, N Graham, K Grant, DR Hahn, RL Hall, JC Hallin, AL Hallman, ED Hamer, AS Handler, WB Hargrove, CK Harvey, PJ Hazama, R Heeger, KM Heintzelman, WJ Heise, J Helmer, RL Hemingway, RJ Hime, A Howe, MA Jagam, P Jelley, NA Klein, JR Kos, MS Krumins, AV Kutter, T Kyba, CCM Labranche, H Lange, R Law, J Lawson, IT Lesko, KT Leslie, JR Levine, I Luoma, S MacLellan, R Majerus, S Mak, HB Maneira, J Marino, AD McCauley, N McDonald, AB McGee, S McGregor, G Mifflin, C Miknaitis, KKS Miller, GG Moffat, BA Nally, CW Nickel, BG Noble, AJ Norman, EB Oblath, NS Okada, CE Ollerhead, RW Orrell, JL Oser, SM Ouellet, C Peeters, SJM Poon, AWP Robertson, BC Robertson, RGH Rollin, E Rosendahl, SSE Rusu, VL Schwendener, MH Simard, O Simpson, JJ Sims, CJ Sinclair, D Skensved, P Smith, MWE Starinsky, N Stokstad, RG Stonehill, LC Tafirout, R Takeuchi, Y Tesic, G Thomson, M Thorman, M Van Berg, R Van de Water, RG Virtue, CJ Wall, BL Waller, D Waltham, CE Tseung, HWC Wark, DL West, N Wilhelmy, JB Wilkerson, JF Wilson, JR Wouters, JM Yeh, M Zuber, K AF Ahmed, SN Anthony, AE Beier, EW Bellerive, A Biller, SD Boger, J Boulay, MG Bowler, MG Bowles, TJ Brice, SJ Bullard, TV Chan, YD Chen, M Chen, X Cleveland, BT Cox, GA Dai, X Dalnoki-Veress, F Doe, PJ Dosanjh, RS Doucas, G Dragowsky, MR Duba, CA Duncan, FA Dunford, M Dunmore, JA Earle, ED Elliott, SR Evans, HC Ewan, GT Farine, J Fergani, H Fleurot, F Formaggio, JA Fowler, MM Frame, K Fulsom, BG Gagnon, N Graham, K Grant, DR Hahn, RL Hall, JC Hallin, AL Hallman, ED Hamer, AS Handler, WB Hargrove, CK Harvey, PJ Hazama, R Heeger, KM Heintzelman, WJ Heise, J Helmer, RL Hemingway, RJ Hime, A Howe, MA Jagam, P Jelley, NA Klein, JR Kos, MS Krumins, AV Kutter, T Kyba, CCM Labranche, H Lange, R Law, J Lawson, IT Lesko, KT Leslie, JR Levine, I Luoma, S MacLellan, R Majerus, S Mak, HB Maneira, J Marino, AD McCauley, N McDonald, AB McGee, S McGregor, G Mifflin, C Miknaitis, KKS Miller, GG Moffat, BA Nally, CW Nickel, BG Noble, AJ Norman, EB Oblath, NS Okada, CE Ollerhead, RW Orrell, JL Oser, SM Ouellet, C Peeters, SJM Poon, AWP Robertson, BC Robertson, RGH Rollin, E Rosendahl, SSE Rusu, VL Schwendener, MH Simard, O Simpson, JJ Sims, CJ Sinclair, D Skensved, P Smith, MWE Starinsky, N Stokstad, RG Stonehill, LC Tafirout, R Takeuchi, Y Tesic, G Thomson, M Thorman, M Van Berg, R Van de Water, RG Virtue, CJ Wall, BL Waller, D Waltham, CE Tseung, HWC Wark, DL West, N Wilhelmy, JB Wilkerson, JF Wilson, JR Wouters, JM Yeh, M Zuber, K CA SNO Collaboration TI Measurement of the total active B-8 solar neutrino flux at the sudbury neutrino observatory with enhanced neutral current sensitivity SO PHYSICAL REVIEW LETTERS LA English DT Article ID OSCILLATIONS; CALIBRATION; MATTER; WATER AB The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) B-8 solar neutrino flux without assumptions about the energy dependence of the nu(e) survival probability. The measurements were made with dissolved NaCl in heavy water to enhance the sensitivity and signature for neutral-current interactions. The flux is found to be 5.21+/-0.27(stat)+/-0.38(syst)x10(6) cm(-2) s(-1), in agreement with previous measurements and standard solar models. A global analysis of these and other solar and reactor neutrino results yields Deltam(2)=7.1(-0.6)(+1.2)x10(-5) eV(2) and theta= 32.5(-2.3)(+2.4) degrees. Maximal mixing is rejected at the equivalent of 5.4 standard deviations. C1 Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Carleton Univ, Dept Phys, Ottawa Carleton Inst Phys, Ottawa, ON K1S 5B6, Canada. Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada. Laurentian Univ, Dept Phys & Astron, Sudbury, ON P3E 2C6, Canada. Univ Calif Berkeley, Lawrence Berkeley Lab, Inst Nucl & Particle Astrophys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Oxford, Dept Phys, Oxford OX1 3RH, England. Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England. TRIUMF, Vancouver, BC V6T 2A3, Canada. Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA. Univ Washington, Dept Phys, Seattle, WA 98195 USA. Univ Texas, Dept Phys, Austin, TX 78712 USA. RP Ahmed, SN (reprint author), Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada. RI Hallin, Aksel/H-5881-2011; Kyba, Christopher/I-2014-2012; Dai, Xiongxin/I-3819-2013; Maneira, Jose/D-8486-2011; Orrell, John/E-9313-2015; OI Kyba, Christopher/0000-0001-7014-1843; Maneira, Jose/0000-0002-3222-2738; Orrell, John/0000-0001-7968-4051; Wilkerson, John/0000-0002-0342-0217 NR 24 TC 519 Z9 521 U1 1 U2 13 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 181301 DI 10.1103/PhysRevLett.92.181301 PG 6 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900010 PM 15089201 ER PT J AU Anthony, PL Arnold, RG Arroyo, C Baird, K Bega, K Biesiada, J Bosted, PE Breuer, M Carr, R Cates, GD Chen, JP Chudakov, E Cooke, M Decker, FJ Decowski, P Deur, A Emam, W Erickson, R Fieguth, T Field, C Gao, J Gustafsson, K Hicks, RS Holmes, R Hughes, EW Humensky, TB Jones, GM Kaufman, LJ Kolomensky, YG Kumar, KS Lhuillier, D Lombard-Nelsen, R Mastromarino, P Mayer, B McKeown, RD Michaels, R Olson, M Paschke, KD Peterson, GA Pitthan, R Pope, K Relyea, D Rock, SE Saxton, O Shapiro, G Singh, J Souder, PA Szalata, ZM Tobias, WA Tonguc, BT Turner, J Tweedie, B Vacheret, A Walz, D Weber, T Weisend, J Whittum, D Woods, M Younus, I AF Anthony, PL Arnold, RG Arroyo, C Baird, K Bega, K Biesiada, J Bosted, PE Breuer, M Carr, R Cates, GD Chen, JP Chudakov, E Cooke, M Decker, FJ Decowski, P Deur, A Emam, W Erickson, R Fieguth, T Field, C Gao, J Gustafsson, K Hicks, RS Holmes, R Hughes, EW Humensky, TB Jones, GM Kaufman, LJ Kolomensky, YG Kumar, KS Lhuillier, D Lombard-Nelsen, R Mastromarino, P Mayer, B McKeown, RD Michaels, R Olson, M Paschke, KD Peterson, GA Pitthan, R Pope, K Relyea, D Rock, SE Saxton, O Shapiro, G Singh, J Souder, PA Szalata, ZM Tobias, WA Tonguc, BT Turner, J Tweedie, B Vacheret, A Walz, D Weber, T Weisend, J Whittum, D Woods, M Younus, I CA SLAC E158 Collaboration TI Observation of parity nonconservation in Moller scattering SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRON-PROTON SCATTERING; POLARIZED ELECTRONS; VIOLATION; ASYMMETRIES; WEAK AB We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Moller) scattering: A(PV)=[-175+/-30(stat)+/-20(syst)]x10(-9). This first direct observation of parity nonconservation in Moller scattering leads to a measurement of the electron's weak charge at low energy Q(W)(e)=-0.053+/-0.011. This is consistent with the standard model expectation at the current level of precision: sin(2)theta(W)(M-Z)((MS) over bar) = 0.2293+/-0.0024(stat)+/-0.0016(syst)+/-0.0006(theory). C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. CALTECH, Pasadena, CA 91125 USA. Univ Massachusetts, Amherst, MA 01003 USA. Princeton Univ, Princeton, NJ 08544 USA. CEA Saclay, DAPNIA, SPhN, F-91191 Gif Sur Yvette, France. Smith Coll, Northampton, MA 01063 USA. Syracuse Univ, Syracuse, NY 13244 USA. Thomas Jefferson Lab, Newport News, VA 23606 USA. Univ Virginia, Charlottesville, VA 22903 USA. RP Anthony, PL (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RI Singh, Jaideep/H-2346-2013; Kolomensky, Yury/I-3510-2015; OI Singh, Jaideep/0000-0002-4810-4824; Kolomensky, Yury/0000-0001-8496-9975; Kumar, Krishna/0000-0001-5318-4622 NR 28 TC 62 Z9 63 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 181602 DI 10.1103/PhysRevLett.92.181602 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900012 PM 15169482 ER PT J AU Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Shen, BC del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Biasini, M Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Pioppi, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Granges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Lodovico, FD Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Shen, BC del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Biasini, M Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Pioppi, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Granges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, M Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Lodovico, FD Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Limits on the decay-rate difference of neutral B mesons and on CP, T, and CPT violation in B-0(B)over-bar(0) oscillations SO PHYSICAL REVIEW LETTERS LA English DT Article ID ASYMMETRIES; SYSTEM AB Using events in which one of two neutral B mesons from the decay of an Y(4S) meson is fully reconstructed, we determine parameters governing decay (DeltaGamma(d)/Gamma(d)), CP, and T violation (\q/p\), and CP and CPT violation (Re z, Im z). The results, obtained from an analysis of 88x10(6) Y(4S) decays recorded by BABAR, are sgn(Re lambda(CP))DeltaGamma(d)/Gamma(d)=-0.008+/-0.037(stat)+/-0.018(syst)[-0.084,0.068], \q/p\=1.029+/-0.013(stat)+/-0.011(syst)[1.001,1.057],(Re lambda(CP)/'lambda(CP)') Re z=0.014+/-0.035(stat)+/-0.034(syst)[-0.072,0.101],Im z>=0.038+/-0.029(stat)+/-0.025(syst)[-0.028,0.104]. The values inside the square brackets indicate the 90% confidence-level intervals. These results are consistent with standard model expectations. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London, Queen Mary, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. Natl Inst Nucl Phys & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl HE, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain. RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; M, Saleem/B-9137-2013; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Della Ricca, Giuseppe/B-6826-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 26 TC 25 Z9 25 U1 2 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 181801 DI 10.1103/PhysRevLett.92.181801 PG 7 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900013 ER PT J AU Batista, CD Gubernatis, JE Bonca, J Lin, HQ AF Batista, CD Gubernatis, JE Bonca, J Lin, HQ TI Intermediate coupling theory of electronic ferroelectricity SO PHYSICAL REVIEW LETTERS LA English DT Article ID FALICOV-KIMBALL MODEL; TRANSITION AB We calculate the quantum phase diagram of an extended Falicov-Kimball model for one- and two-dimensional systems in the intermediate coupling regime. Even though some features of the phase diagram are obtained analytically, the main results are calculated with a constrained path Monte Carlo technique. We find that this regime is dominated by a Bose-Einstein condensation of excitons with a built-in electric polarization. The inclusion of a finite hybridization between the bands removes the condensate but reinforces the ferroelectricity. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Ljubljana, FMF, Dept Phys, Ljubljana, Slovenia. Jozef Stefan Inst, Ljubljana, Slovenia. Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China. RP Batista, CD (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. NR 11 TC 47 Z9 47 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 187601 DI 10.1103/PhysRevLett.92.187601 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900061 PM 15169531 ER PT J AU Cai, W Galli, G AF Cai, W Galli, G TI Ab initio calculations in a uniform magnetic field using periodic supercells SO PHYSICAL REVIEW LETTERS LA English DT Article ID MOLECULAR-DYNAMICS; FIRST-PRINCIPLES; SOLIDS AB We present a formulation of ab initio electronic structure calculations in a finite magnetic field, which retains the simplicity and efficiency of techniques widely used in first principles molecular dynamics simulations, based on plane-wave basis sets and Fourier transforms. In addition we discuss results obtained with this method for the energy spectrum of interacting electrons in quantum wells, and for the electronic properties of dense fluid deuterium in a uniform magnetic field. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Cai, W (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. OI Cai, Wei/0000-0001-5919-8734 NR 19 TC 14 Z9 14 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 186402 DI 10.1103/PhysRevLett.92.186402 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900044 PM 15169514 ER PT J AU Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z AF Hancock, JN McKnew, T Schlesinger, Z Sarrao, JL Fisk, Z TI Kondo scaling in the optical response of YbIn1-xAgxCu4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID VALENCE TRANSITION; ANDERSON MODEL; YBINCU4 AB Theoretical work on Kondo systems predicts universality in the scaling of observable quantities with the Kondo temperature, T-K. Here we report infrared-frequency optical response measurements of the correlated system YbIn1-xAgxCu4. We observe that x-dependent variations in the frequency and strength of a low-energy excitation are related to the x-dependent Kondo temperature. Comparison of the inferred trends with existing theory and a model calculation provides a framework in which to view these experimental results as scaling phenomena arising from local-moment/conduction electron hybridization. C1 Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. RP Hancock, JN (reprint author), Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. RI Hancock, Jason/F-4694-2010 NR 19 TC 28 Z9 28 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 186405 DI 10.1103/PhysRevLett.92.186405 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900047 PM 15169517 ER PT J AU Paggel, JJ Luh, DA Miller, T Chiang, TC AF Paggel, JJ Luh, DA Miller, T Chiang, TC TI Electronic-structure dependence of the electron-phonon interaction in Ag SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANGLE-RESOLVED PHOTOEMISSION; QUASI-PARTICLE LIFETIMES; QUANTUM-WELL STATES; SURFACE; ENERGY; HOLE AB The linewidths of sp- and d-band derived electronic quantum-well states in thin films of Ag on Fe(100) are measured as a function of temperature to yield the electron-phonon coupling parameters. The results vary by a factor of up to 35 among the different states. The origin of these huge differences is traced to the decay path selection for the various initial states of the holes created by the photoemission process. The electron-phonon coupling parameter for the top d-band quantum-well state, 0.015+/-0.006, is the smallest ever reported. C1 Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94015 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. RP Paggel, JJ (reprint author), Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany. RI LUH, DAH-AN/B-3921-2008; Chiang, Tai/H-5528-2011 NR 16 TC 34 Z9 35 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 186803 DI 10.1103/PhysRevLett.92.186803 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900051 PM 15169521 ER PT J AU Regan, SP Delettrez, JA Goncharov, VN Marshall, FJ Soures, JM Smalyuk, VA Radha, PB Yaakobi, B Epstein, R Glebov, VY Jaanimagi, PA Meyerhofer, DD Sangster, TC Seka, W Skupsky, S Stoeckl, C Haynes, DA Frenje, JA Li, CK Petrasso, RD Seguin, FH AF Regan, SP Delettrez, JA Goncharov, VN Marshall, FJ Soures, JM Smalyuk, VA Radha, PB Yaakobi, B Epstein, R Glebov, VY Jaanimagi, PA Meyerhofer, DD Sangster, TC Seka, W Skupsky, S Stoeckl, C Haynes, DA Frenje, JA Li, CK Petrasso, RD Seguin, FH TI Dependence of shell mix on feedthrough in direct drive inertial confinement fusion SO PHYSICAL REVIEW LETTERS LA English DT Article ID RAYLEIGH-TAYLOR GROWTH; PLANAR TARGETS; LASER-FUSION; IMPLOSIONS; EVOLUTION; OMEGA; NONUNIFORMITIES; INSTABILITIES; COMPRESSION; PERFORMANCE AB The mixing of cold, high-density shell plasma with the low-density, hot spot plasma by the Rayleigh-Taylor instability in inertial confinement fusion is experimentally shown to correlate with the calculated perturbation feedthrough from the ablation surface to the inner shell surface. A fourfold decrease in the density of shell material in the mix region of direct drive implosions of gas filled spherical plastic shells having predicted convergence ratios similar to15 was observed when laser imprint levels were reduced and the initial shell was thicker, corresponding to a reduction in the feedthrough rms level by a factor of 6. Shell mix is also shown to limit the spherical compression of the implosion. C1 Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Univ Rochester, Dept Mech Engn, Rochester, NY 14623 USA. Univ Rochester, Dept Phys & Astron, Rochester, NY 14623 USA. RP Regan, SP (reprint author), Univ Rochester, Laser Energet Lab, 250 E River Rd, Rochester, NY 14623 USA. RI Goncharov, Valeri/H-4471-2011 NR 26 TC 20 Z9 20 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 185002 DI 10.1103/PhysRevLett.92.185002 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900023 PM 15169493 ER PT J AU Schaller, RD Klimov, VI AF Schaller, RD Klimov, VI TI High efficiency carrier multiplication in PbSe nanocrystals: Implications for solar energy conversion SO PHYSICAL REVIEW LETTERS LA English DT Article ID QUANTUM DOTS; IMPACT IONIZATION; ELECTRON-TRANSFER; CELL EFFICIENCY; OPTICAL GAIN; DYNAMICS; EMISSION; POLYMER AB We demonstrate for the first time that impact ionization (II) (the inverse of Auger recombination) occurs with very high efficiency in semiconductor nanocrystals (NCs). Interband optical excitation of PbSe NCs at low pump intensities, for which less than one exciton is initially generated per NC on average, results in the formation of two or more excitons (carrier multiplication) when pump photon energies are more than 3 times the NC band gap energy. The generation of multiexcitons from a single photon absorption event is observed to take place on an ultrafast (picosecond) time scale and occurs with up to 100% efficiency depending upon the excess energy of the absorbed photon. Efficient II in NCs can be used to considerably increase the power conversion efficiency of NC-based solar cells. C1 Los Alamos Natl Lab, Div Chem, CPCS, Los Alamos, NM 87545 USA. RP Schaller, RD (reprint author), Los Alamos Natl Lab, Div Chem, CPCS, POB 1663, Los Alamos, NM 87545 USA. NR 24 TC 1120 Z9 1137 U1 26 U2 300 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 186601 DI 10.1103/PhysRevLett.92.186601 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900048 PM 15169518 ER PT J AU Shi Jr Tang, SJ Wu, B Sprunger, PT Yang, WL Brouet V Zhou, XJ Hussain, Z Shen, ZX Zhang, ZY Plummer, EW AF Shi, JR Tang, SJ Wu, B Sprunger, PT Yang, WL Brouet, V Zhou, XJ Hussain, Z Shen, ZX Zhang, ZY Plummer, EW TI Direct extraction of the Eliashberg function for electron-phonon coupling: A case study of Be(10(1)over-bar0) SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANGLE-RESOLVED PHOTOEMISSION; SURFACE-STATE; SUPERCONDUCTIVITY; SPECTRA; ENERGY AB We propose a systematic procedure to directly extract the Eliashberg function for electron-phonon coupling from high-resolution angle-resolved photoemission measurement. The procedure is successfully applied to the Be(10 (1) over bar0) surface, providing new insights into electron-phonon coupling at this surface. The method is shown to be robust against imperfections in experimental data and suitable for wider applications. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Univ Texas, Dept Phys, Austin, TX 78712 USA. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Shi Jr (reprint author), Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RI Wu, Biao/B-3329-2008; Shi, Junren/D-5156-2009; Yang, Wanli/D-7183-2011 OI Wu, Biao/0000-0001-9229-5894; Yang, Wanli/0000-0003-0666-8063 NR 24 TC 57 Z9 57 U1 3 U2 11 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 186401 DI 10.1103/PhysRevLett.92.186401 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900043 PM 15169513 ER PT J AU Soderlind, P Sadigh, B AF Soderlind, P Sadigh, B TI Density-functional calculations of alpha, beta, gamma, delta, delta ', and epsilon plutonium SO PHYSICAL REVIEW LETTERS LA English DT Article ID EQUILIBRIUM PROPERTIES; CRYSTAL-STRUCTURES; BRILLOUIN-ZONE; SPECIAL POINTS; PU; APPROXIMATION; SYSTEMS; PICTURE; CERIUM; METALS AB Total energies for the six known polymorphs of plutonium metal have been calculated within spin and orbital polarized density-functional theory as a function of lattice constant. Theoretical equilibrium volumes and bulk moduli correspond well with experimental data and the calculated total energies are consistent with the known phase diagram of Pu. It is shown that a preference for the formation of magnetic moments, increasing through the alpha-->beta-->gamma phases, explains their position in the ambient pressure phase diagram and their anomalous variation of atomic density. A simple model is presented that establishes a relationship between atomic density, crystal symmetry, and magnetic moments which is universally valid for all Pu phases. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Soderlind, P (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 24 TC 127 Z9 128 U1 2 U2 20 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 185702 DI 10.1103/PhysRevLett.92.185702 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900036 PM 15169506 ER PT J AU Zerec, I Keppens, V McGuire, MA Mandrus, D Sales, BC Thalmeier, P AF Zerec, I Keppens, V McGuire, MA Mandrus, D Sales, BC Thalmeier, P TI Four-well tunneling states and elastic response of clathrates SO PHYSICAL REVIEW LETTERS LA English DT Article ID THERMAL-CONDUCTIVITY; STRUCTURAL DISORDER; SR8GA16GE30; SOLIDS; GLASS AB We present resonant ultrasound elastic constant measurements of the Eu8Ga16Ge30 and Sr8Ga16Ge30 clathrates. The elastic response of the Eu clathrate provides clear evidence for the existence of a new type of four-well tunneling states, described by two nearly degenerate four level systems (FLS). The FLS's are closely linked with the fourfold split positions of Eu known from neutron diffraction density profiles. Using a realistic potential we estimate the tunneling frequencies and show that the energy gap between the two FLS's explains the observed harmonic oscillator type specific heat. In addition the quadrupolar interaction of FLS's with elastic strains explains the pronounced depression observed in elastic constant measurements. In the case of the Sr clathrate, we explain the elastic properties assuming the same type of interaction, but with Sr Einstein mode. C1 Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Univ Mississippi, Dept Phys & Astron, University, MS 38677 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Zerec, I (reprint author), Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. RI McGuire, Michael/B-5453-2009; Mandrus, David/H-3090-2014 OI McGuire, Michael/0000-0003-1762-9406; NR 14 TC 39 Z9 39 U1 1 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 185502 DI 10.1103/PhysRevLett.92.185502 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900027 PM 15169497 ER PT J AU Zhou, XJ Yoshida, T Lee, DH Yang, WL Brouet, V Zhou, F Ti, WX Xiong, JW Zhao, ZX Sasagawa, T Kakeshita, T Eisaki, H Uchida, S Fujimori, A Hussain, Z Shen, ZX AF Zhou, XJ Yoshida, T Lee, DH Yang, WL Brouet, V Zhou, F Ti, WX Xiong, JW Zhao, ZX Sasagawa, T Kakeshita, T Eisaki, H Uchida, S Fujimori, A Hussain, Z Shen, ZX TI Dichotomy between nodal and antinodal quasiparticles in underdoped (La2-xSrx)CuO4 superconductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID T-C; MAGNETIC FLUCTUATIONS; ELECTRONIC-STRUCTURE; DOPING DEPENDENCE; BI2SR2CACU2O8+DELTA; LA2-XSRXCUO4; TEMPERATURE; DISPERSION AB High resolution angle-resolved photoemission measurements on an underdoped (La2-xSrx)CuO4 system show that, at energies below 70 meV, the quasiparticle peak is well defined around the (pi/2,pi/2) nodal region and disappears rather abruptly when the momentum is changed from the nodal point to the (pi,0) antinodal point along the underlying "Fermi surface." It indicates that there is an extra low energy scattering mechanism acting upon the antinodal quasiparticles. We propose that this mechanism is the scattering of quasiparticles across the nearly parallel segments of the Fermi surface near the antinodes. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 113, Japan. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100080, Peoples R China. Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan. RP Zhou, XJ (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. RI Sasagawa, Takao/E-6666-2014; Yang, Wanli/D-7183-2011 OI Sasagawa, Takao/0000-0003-0149-6696; Yang, Wanli/0000-0003-0666-8063 NR 21 TC 99 Z9 100 U1 3 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAY 7 PY 2004 VL 92 IS 18 AR 187001 DI 10.1103/PhysRevLett.92.187001 PG 4 WC Physics, Multidisciplinary SC Physics GA 818XN UT WOS:000221277900054 PM 15169524 ER PT J AU Lehmann, J Stern, RL Levy, J Daly, TP Siantar, CLH Goldberg, Z AF Lehmann, J Stern, RL Levy, J Daly, TP Siantar, CLH Goldberg, Z TI Radiation phantom with humanoid shape and adjustable thickness (RPHAT) SO PHYSICS IN MEDICINE AND BIOLOGY LA English DT Article ID RANDO PHANTOM AB A new radiation phantom with humanoid shape and adjustable thickness (RPHAT) has been developed. Unlike the RANDO(R) phantom which is a fixed thickness, this newly designed phantom has adjustable thickness to address the range of thicknesses of real-world patients. RPHAT allows adjustment of the body thickness by being sliced in the coronal (instead of axial) direction. Centre slices are designed so that more sections can be added or removed while maintaining the anthropomorphic shape. A prototype of the new phantom has been successfully used in a study investigating peripheral dose delivery, where the amount of scatter within the patient, and therefore the patient thickness, plays a critical role in dose deposition. This newly designed phantom is an important tool to improve the quality of radiation therapy. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Ctr Canc, Sacramento, CA 95817 USA. Phantom Lab, Greenwich, NY 12834 USA. RP Lehmann, J (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-9155 J9 PHYS MED BIOL JI Phys. Med. Biol. PD MAY 7 PY 2004 VL 49 IS 9 BP N125 EP N129 AR PII S0031-9155(04)76361-7 DI 10.1088/0031-9155/49/9/N02 PG 5 WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Radiology, Nuclear Medicine & Medical Imaging GA 824SA UT WOS:000221705400018 PM 15152935 ER PT J AU Gatti-Bono, C Perkins, NC AF Gatti-Bono, C Perkins, NC TI Numerical model for the dynamics of a coupled fly line/fly rod system and experimental validation SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID FLYLINE AB A model is presented that describes the two-dimensional dynamics of the coupled system composed of a fly rod and a fly line. The fly line is modelled as a long elastica that is subjected to tension, bending, aerodynamic drag, and weight. The fly rod is modelled as a flexible Euler-Bernoulli beam possessing two degrees of freedom: a rigid-body mode, and a flexible-body mode. The line and the rod are coupled through the boundary conditions at their interface. The resulting initial two-point boundary-value problem is solved numerically using a finite difference algorithm. The numerical solutions for an overhead cast are computed using experimental data as the input for the motion of caster's hand. The shape of the fly line and the position of the fly rod are compared with images captured by video. (C) 2003 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Lab, CRD, Berkeley, CA 94720 USA. Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA. RP Perkins, NC (reprint author), Lawrence Berkeley Lab, CRD, Berkeley, CA 94720 USA. EM ncp@umich.edu NR 16 TC 4 Z9 4 U1 1 U2 3 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD MAY 6 PY 2004 VL 272 IS 3-5 BP 773 EP 791 DI 10.1016/S0022-460X(03)00419-X PG 19 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA 814UW UT WOS:000221000600015 ER PT J AU Polson, MIJ Howell, SL Flood, AH Burrell, AK Blackman, AG Gordon, KC AF Polson, MIJ Howell, SL Flood, AH Burrell, AK Blackman, AG Gordon, KC TI Synthesis and electronic properties of mononuclear osmium(II) and rhenium(l) complexes containing ligands derived from [2,3-a : 3 ',2 '-c]dipyridophenazine (ppb) SO POLYHEDRON LA English DT Article DE osmium; rhenium; polypyridyl; synthesis; spectroscopy ID LIGHT-EMITTING DEVICES; POLYPYRIDYL BRIDGING LIGANDS; CHELATED RUTHENIUM(II) COMPLEX; TRANSITION-METAL-COMPLEXES; COORDINATION; SEPARATION; TIO2 AB An improved method for the synthesis of the polypyridyl ligand [2,3-a:3',2'-c]dipyridophenazine (ppb) is reported. In addition, the syntheses of the new ppb-based ligands L (L = [2,3-a:3',2'-c]dipyridophenazine, [2,3-a:3',2'-c]dipyrido-6,7-dimethylphenazine, [2,3-a:3',2'-c]dipyrido-6,7-dichlorophenazine, [2,3-a:3',2'-c]dipyrido[1,2-e]benzophenazine, [2,3-a:3',2'-c:3",2"-e]tripyridoquinoxaline and [2,3 -a:3',2'-c]dipyrido-5-methylphenazine) are detailed. The complexes [Os(ppb)(bpy)(2)](2+) and [Os(L)(bpy)(2)](2+) have been synthesised and their electrochemical, electronic absorption and UV-Vis spectrochemical properties measured. Syntheses of the rhenium(l) complexes fac-[Re(L")(CO)(3)Cl] (L" = [2,3-a:3',2'-c]dipyridophenazine, [2,3-a:3',2'-c]dipyrido-6,7-dimethylphenazine, [2,3-a:3',2'-c]dipyrido-6,7-dichlorophenazine, [2,3-a:3',2'-c]dipyrido[1,2-e]benzophenazine) are also reported. The osmium(II) complexes [Os(L')(bpy)(2)](2+) (L' = 2,3-di-(2-pyridyl)quinoxaline, 6,7-dimethyl-2,3-di-(2-pyridyl)quinoxaline, 6,7-chloro-2,3-di-(2-pyridyl)quinoxaline, 2,3-di-(2-pyridyl)benzo[g]quinoxaline, 4-methyl-di-(2-pyridyl)quinoxaline) have also been prepared and studied. The electronic spectra of the Os and Re complexes are dominated by strong MLCT transitions. The lowest energy MLCT transitions correlate linearly with the first reduction potential for the [Os(L)(bpy)(2)](2+) series. Electrochemical oxidation of the [Os(L)(bpy)(2)](2+) and [Os(L')(bpy)(2)](2+) complexes results in the appearance of LMCT transitions in the visible region while reduction of the [Os(L)(bpy)(2)](2+) complexes produces complex electronic spectra. Comparison with the reduced fac-[Re(L")(CO)(3)Cl] complexes allows assignment of L"(.-) pi --> pi* transitions in the NIR (1200-1000 nm) and red (850-700 nm) regions. The nonsymmetrical ligands [2,3-a:3',.2'-c:3",2"-e]tripyridoquinoxaline and [2,3-a:3',2'-c]dipyrido-5-methylphenazine both coordinate to the [Os(bpy)(2)](2+) unit in a stereospecific manner to give a single geometric isomer. The crystal structure of [Re(CO)(3)(ppb)Cl] is reported, in which the polypyridyl ligand deviates significantly from planarity. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ Otago, Dept Chem, Dunedin, New Zealand. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Blackman, AG (reprint author), Univ Otago, Dept Chem, POB 56, Dunedin, New Zealand. EM blackman@alkali.otago.ac.nz; kgordon@alkali.otago.ac.nz RI Gordon, Keith/B-7149-2008; Flood, Amar/B-3863-2016; OI Polson, Matthew/0000-0002-3067-8520 NR 49 TC 15 Z9 15 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD MAY 6 PY 2004 VL 23 IS 8 BP 1427 EP 1439 DI 10.1016/j.poly.2004.02.012 PG 13 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA 820DO UT WOS:000221367400018 ER PT J AU Suzuki, T Zhang, YW Koyama, T Sasaki, DY Kurihara, K AF Suzuki, T Zhang, YW Koyama, T Sasaki, DY Kurihara, K TI Direct observation of specific interaction between enzyme-substrate complexes using colloidal probe atomic force microscopy SO CHEMISTRY LETTERS LA English DT Article AB The interactions between the enzyme-substrate complex of heptaprenyl diphosphate synthase were directly investigated using colloidal probe atomic force microscopy. This enzyme is composed of two dissociable subunits which exhibit a catalytic activity only when they are associated together in the presence of Mg2+ and farnesyl diphosphate (FPP). We observed the adhesive force between the subunits only in the presence of both Mg2+ (0.1 mM) and FPP (15 muM). This is the first direct demonstration of the specific interaction involved in the enzyme reaction. C1 Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan. Sandia Natl Labs, Biomol Mat Dept, Albuquerque, NM 87185 USA. RP Kurihara, K (reprint author), Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan. RI Kurihara, Kazue/E-5018-2010 NR 8 TC 4 Z9 4 U1 0 U2 1 PU CHEMICAL SOC JAPAN PI TOKYO PA 1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN SN 0366-7022 EI 1348-0715 J9 CHEM LETT JI Chem. Lett. PD MAY 5 PY 2004 VL 33 IS 5 BP 536 EP 537 DI 10.1246/cl.2004.536 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 822GY UT WOS:000221528300026 ER PT J AU Bertram, HC Hu, JZ Rommereim, DN Wind, RA Andersen, HJ AF Bertram, HC Hu, JZ Rommereim, DN Wind, RA Andersen, HJ TI Dynamic high-resolution H-1 and P-31 NMR spectroscopy and H-1 T-2 measurements in postmortem rabbit muscles using slow magic angle spinning SO JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY LA English DT Article DE muscle water; water-holding capacity; muscle metabolism; pH; adrenaline; MAS; creatine ID NUCLEAR-MAGNETIC-RESONANCE; WATER-HOLDING CAPACITY; MORTEM ENERGY-METABOLISM; POST-MORTEM; INTRACELLULAR PH; SKELETAL-MUSCLE; H-1-NMR SPECTROSCOPY; BOVINE MUSCLES; HUMAN PROSTATE; INTACT MUSCLE AB Postmortem changes in rabbit muscle tissue with different glycogen status (normal vs low) were followed continuously from 13 min postmortem until 8 h postmortem and again 20 h postmortem using simultaneous magic angle spinning H-1 and P-31 NMR spectroscopy together with measurement of the transverse relaxation time, T-2, of the muscle water. The 1H metabolite spectra were measured using the phase-altered spinning sidebands (PASS) technique at a spinning rate of 40 Hz. pH values calculated from the P-31 NMR spectra using the chemical shifts of the C-6 line of histidine in the H-1 spectra and the chemical shifts of inorganic phosphate in the P-31 spectra confirmed the different muscle glycogen status in the tissues. High-resolution H-1 spectra obtained from the PASS technique revealed the presence of a new resonance line at similar to6.8 ppm during the postmortem period, which were absent in muscles with low muscle glycogen content. This new resonance line may originate from the aminoprotons in creatine, and its appearance may be a result of a pH effect on the exchange rate between the amino and the water protons and thereby the NMR visibility. Alternatively, the new resonance line may originate from the aromatic protons in tyrosine, and its appearance may be a result of a pH-induced protein unfolding exposing hydrophobic amino acid residues to the aqueous environment. Further studies are needed to evaluate these hypotheses. Finally, distributed analysis of the water T-2 relaxation data revealed three relaxation populations and an increase in the population believed to reflect extramyofibrillar water through the postmortem period. This increase was significantly reduced (p < 0.0001) in samples from animals with low muscle glycogen content, indicating that the pH is controlling the extent of postmortem expulsion of water from myofibrillar structures. The significance of the postmortem increase in the amount extramyofibrillar water on the water-holding capacity was verified by centrifugation, which showed a reduced centrifugation loss in muscles with low preslaughter glycogen status (0.9 vs 1.9%, p = 0.07). C1 Danish Inst Agr Sci, Res Ctr Foulum, Dept Food Sci, DK-8830 Tjele, Denmark. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Bertram, HC (reprint author), Danish Inst Agr Sci, Res Ctr Foulum, Dept Food Sci, POB 50, DK-8830 Tjele, Denmark. EM HanneC.Bertram@agrsci.dk RI Hu, Jian Zhi/F-7126-2012 NR 53 TC 21 Z9 21 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0021-8561 J9 J AGR FOOD CHEM JI J. Agric. Food Chem. PD MAY 5 PY 2004 VL 52 IS 9 BP 2681 EP 2688 DI 10.1021/jf030614y PG 8 WC Agriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology SC Agriculture; Chemistry; Food Science & Technology GA 816UP UT WOS:000221135100041 PM 15113176 ER PT J AU Chung, GY Williams, JR McDonald, K Feldman, LC AF Chung, GY Williams, JR McDonald, K Feldman, LC TI 4H-SiC oxynitridation for generation of insulating layers SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Review ID OXIDE-SEMICONDUCTOR CAPACITORS; INTERFACE-STATE DENSITY; INVERSION CHANNEL MOBILITY; 11(2)OVER-BAR0 FACE; HIGH-TEMPERATURE; SILICON-CARBIDE; BAND-EDGES; MOSFETS; 4H; N2O AB This paper describes the present state of a nitrogen-based passivation for SiO2 layers on 4H-SiC. Interface state density, oxide breakdown field, channel mobility and gate oxide reliability have been characterized following nitric oxide (NO) passivation anneals. The kinetics of nitrogen incorporation and the quantitative modelling between nitrogen content and interface trap density with NO anneals have also been discussed. C1 Dow Corning Corp, Tampa, FL 33619 USA. Auburn Univ, Dept Phys, Auburn, AL 36849 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Chung, GY (reprint author), Dow Corning Corp, Tampa, FL 33619 USA. EM feldman@ctrvax.vanderbilt.edu NR 41 TC 23 Z9 24 U1 1 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD MAY 5 PY 2004 VL 16 IS 17 BP S1857 EP S1871 AR PII S0953-8984(04)65153-8 DI 10.1088/0953-8984/16/17/020 PG 15 WC Physics, Condensed Matter SC Physics GA 821SN UT WOS:000221483000021 ER PT J AU Loscertales, IG Barrero, A Marquez, M Spretz, R Velarde-Ortiz, R Larsen, G AF Loscertales, IG Barrero, A Marquez, M Spretz, R Velarde-Ortiz, R Larsen, G TI Electrically forced coaxial nanojets for one-step hollow nanofiber design SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TEMPLATE SYNTHESIS; SCALING LAWS; TAYLOR CONES; NANOTUBES; FIBERS; NANOWIRES; CARBON; METAL; JETS C1 Yflow SL, Seville 41018, Spain. Univ Malaga, ETS Ingn Ind, Malaga 29013, Spain. Univ Sevilla, ES Ingn, Seville 41092, Spain. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. Lincoln Univ, Dept Chem Engn, Lincoln, NE 68588 USA. RP Loscertales, IG (reprint author), Yflow SL, C-Camilo Jose Cela 2,2 B, Seville 41018, Spain. EM loscertales@uma.es; glarsen@unlserve.unl.edu NR 26 TC 215 Z9 225 U1 5 U2 77 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 5 PY 2004 VL 126 IS 17 BP 5376 EP 5377 DI 10.1021/ja049443j PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 816US UT WOS:000221135400021 PM 15113206 ER PT J AU Raebiger, JW Miedaner, A Curtis, CJ Miller, SM Anderson, OP DuBois, DL AF Raebiger, JW Miedaner, A Curtis, CJ Miller, SM Anderson, OP DuBois, DL TI Using ligand bite angles to control the hydricity of palladium diphosphine complexes SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HYDRIDE DONOR ABILITIES; METAL-HYDROGEN BOND; PHOSPHINE COMPLEXES; CRYSTAL-STRUCTURES; PLATINUM; NICKEL; CATION; SERIES; PROTON; SIZE AB A series of [Pd(diphosphine)(2)](BF4)(2) and Pd(diphosphine)(2) complexes have been prepared for which the natural bite angle of the diphosphine ligand varies from 78degrees to 111degrees. Structural studies have been completed for 7 of the 10 new complexes described. These structural studies indicate that the dihedral angle between the two planes formed by the two phosphorus atoms of the diphosphine ligands and palladium increases by over 500 as the natural bite angle increases for the [Pd(diphosphine)21(BF4)2 complexes. The dihedral angle for the Pd(diphosphine)(2) complexes varies less than 10degrees for the same range of natural bite angles. Equilibrium reactions of the Pd(diphosphine)2 complexes with protonated bases to form the corresponding [HPd(diphosphine)(2)](+) complexes were used to determine the pK(a) values of the corresponding hydrides. Cyclic voltammetry studies of the [Pd(diphosphine)21(BF4)2 complexes were used to determine the half-wave potentials of the Pd(ll/l) and Pd(l/0) couples. Thermochemical cycles, half-wave potentials, and measured pK(a) values were used to determine both the homolytic ([HPd(diphosphine)(2)](+) --> [Pd(diphosphine)(2)](+) + H-.) and the heterolytic ([HPd(diphosphine)(2)](+) --> [Pd(diphosphine)(2)](2+) + H-) bond-dissociation free energies, DeltaG(H)(O)(.) and DeltaG(H)(O)-, respectively. Linear free-energy relationships are observed between pK(a) H and the Pd(1/0) Couple and between DeltaG(H)(o)- and the Pd(ll/l) couple. The measured values for DeltaG(H)(o)(.) were all 57 kcal/mol, whereas the values of DeltaG(H)(o)- ranged from 43 kcal/mol for [HPd(depe)(2)](+) (where depe is bis- (diethylphosphino)ethane) to 70 kcal/mol for [HPd(EtXantphOS)(2)1](+) (where EtXantphos is 9,9-dimethyl-4,5bis(diethylphosphino)xanthene). It is estimated that the natural bite angle of the ligand contributes approximately 20 kcal/mol to the observed difference of 27 kcal/mol for DeltaG(H)(o)-. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA. RP DuBois, DL (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM dan_dubois@nrel.gov NR 33 TC 88 Z9 88 U1 2 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 5 PY 2004 VL 126 IS 17 BP 5502 EP 5514 DI 10.1021/ja0395240 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA 816US UT WOS:000221135400037 PM 15113222 ER PT J AU Zanonato, P Di Bernardo, P Bismondo, A Liu, GK Chen, XY Rao, LF AF Zanonato, P Di Bernardo, P Bismondo, A Liu, GK Chen, XY Rao, LF TI Hydrolysis of uranium(VI) at variable temperatures (10-85 degrees C) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID PARTIAL MOLAL PROPERTIES; LASER-INDUCED FLUORESCENCE; ELEVATED-TEMPERATURES; HIGH-PRESSURES; TRANSPORT-PROPERTIES; CHEMICAL SPECIATION; STRONG ELECTROLYTES; URANYL COMPLEXES; AQUEOUS-SOLUTION; CONSTANTS AB The hydrolysis of uranium (VI) in tetraethylammonium perchlorate (0.10 mol dm(-3) at 25 C) was studied at variable temperatures (10-85 degreesC). The hydrolysis constants (*betan,m) and enthalpy of hydrolysis (DeltaHn,m) for the reaction MUO22+ + nH(2)O = (UO2)(m)(OH)n((2M-n)+) + nH(+) were determined by titration potentiometry and calorimetry. The hydrolysis constants, *beta(1,1),*beta(2,2),and *beta(5,3), increased by 2-5 orders of magnitude as the temperature was increased from 10 to 85 degreesC. The enthalpies of hydrolysis, DeltaH(2),(2) and AH(5,3), also varied: DeltaH(2,2) became more endothermic while DeltaH(5,3) became less endothermic as the temperature was increased. The heat capacities of hydrolysis, DeltaC(p(2,2)) and DeltaC(p(5,3)), were calculated to be (152 +/- 43) J K-1 mol(-1) and -(229 +/- 34) J K-1 mol(-1), respectively. UV/Vis absorption spectra supported the trend that hydrolysis of U(VI) was enhanced at elevated temperatures. Time-resolved laser-induced fluorescence spectroscopy provided additional information on the hydrolyzed species at different temperatures. Approximation approaches to predict the effect of temperature were tested with the data from this study. C1 Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. CNR, Ist Chim Inorgan & Superfici, I-35127 Padua, Italy. Univ Padua, Dipartimento Chim Inorgan Metallorgan & Anali, I-35131 Padua, Italy. RP Rao, LF (reprint author), Lawrence Berkeley Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. EM LRao@lbl.gov RI Chen, Xueyuan/C-5613-2012 OI Chen, Xueyuan/0000-0003-0493-839X NR 42 TC 71 Z9 71 U1 6 U2 45 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 5 PY 2004 VL 126 IS 17 BP 5515 EP 5522 DI 10.1021/ja0398666 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA 816US UT WOS:000221135400038 PM 15113223 ER PT J AU Alam, TM Nyman, M Cherry, BR Segall, JM Lybarger, LE AF Alam, TM Nyman, M Cherry, BR Segall, JM Lybarger, LE TI Multinuclear NMR investigations of the oxygen, water, and hydroxyl environments in sodium hexaniobate SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; SOLID-STATE NMR; HIGH-RESOLUTION H-1-NMR; SIDE-BAND PATTERNS; MAS NMR; CHARGE-DISTRIBUTION; CRYSTAL-STRUCTURE; PROTON SITES; SPECTROSCOPY; ACID AB Solid-state H-1, O-17 MAS NIVIR, H-1-Nb-93 TRAPDOR NMR, and H-1 double quantum 2D MAS NMR experiments were used to characterize the oxygen, water, and hydroxyl environments in the monoprotonated hexaniobate material, Na-7[HNb6O19].15H(2)O. These solid-state NMR experiments demonstrate that the proton is located on the bridging oxygen of the [Nb6O19](8-) cluster. The solid-state NMR results also show that the NbOH protons are spatially isolated from similar protons, but undergo proton exchange with the water species located in the crystal lattice. On the basis of double quantum H-1 MAS NMR measurements, it was determined that the water species in the crystal lattice have restricted motional dynamics. Two-dimensional H-1-O-17 MAS NMR correlation experiments show that these restricted waters are preferentially associated with the bridging oxygen. Solution O-17 NMR experiments show that the hydroxyl proton is also attached to the bridging oxygen for the compound in solution. In addition, solution O-17 NMR kinetic studies for the hexaniobate allowed the measurement of relative oxygen exchange rates between the bridging, terminal, and hydroxyl oxygen and the oxygen of the solvent as a function of pH and temperature. These NMR experiments are some of the first investigations into the proton location, oxygen and proton exchange processes, and water dynamics for a base stable polyoxoniobate material, and they provide insight into the chemistry and reactivity of these materials. C1 Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. Sandia Natl Labs, Dept Geochem, Albuquerque, NM 87185 USA. RP Alam, TM (reprint author), Sandia Natl Labs, Dept Organ Mat, Albuquerque, NM 87185 USA. EM tmalam@sandia.gov NR 51 TC 74 Z9 74 U1 4 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAY 5 PY 2004 VL 126 IS 17 BP 5610 EP 5620 DI 10.1021/ja0398159 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA 816US UT WOS:000221135400048 PM 15113233 ER PT J AU Sun, YK Kang, SH Amine, K AF Sun, YK Kang, SH Amine, K TI Synthesis and electrochemical behavior of layered Li(Ni0.5-xCo2xMn0.5-x)O-2 (x=0 and 0.025) materials prepared by solid-state reaction method SO MATERIALS RESEARCH BULLETIN LA English DT Article ID LITHIUM-ION BATTERIES; INSERTION ELECTRODE MATERIALS; CATHODE MATERIALS; PERFORMANCE AB Layered Li(Ni0.5-xCO2xMn0.5-x)O-2 (x = 0 and 0.025) materials were prepared by conventional solid state reaction method combined with high energy ball milling (HEBM). The Li(Ni0.5-xCO2xMn0.5-x)O-2 electrodes delivered discharge capacity of 142-185 mAh/g depending on upper cut-off voltage limit with excellent cycleability. The charge/discharge and differential capacity versus voltage studies show that only one phase reaction occurs and no phase transition takes place during the electrochemical cycling. (C) 2004 Elsevier Ltd. All rights reserved. C1 Hanyang Univ, Ctr Informat & Commun Mat, Dept Chem Engn, Seoul 133791, South Korea. Argonne Natl Lab, Electrochem Technol Program, Div Chem Engn, Argonne, IL 60439 USA. RP Sun, YK (reprint author), Hanyang Univ, Ctr Informat & Commun Mat, Dept Chem Engn, Seoul 133791, South Korea. EM yksun@hanyang.ac.kr RI Kang, Sun-Ho/E-7570-2010; Sun, Yang-Kook/B-9157-2013; Amine, Khalil/K-9344-2013 OI Sun, Yang-Kook/0000-0002-0117-0170; NR 14 TC 22 Z9 25 U1 1 U2 11 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0025-5408 J9 MATER RES BULL JI Mater. Res. Bull. PD MAY 5 PY 2004 VL 39 IS 6 BP 819 EP 825 DI 10.1016/j.materresbull.2004.02.007 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA 817IL UT WOS:000221171100008 ER PT J AU Facciotti, MT Cheung, VS Lunde, CS Rouhani, S Baliga, NS Glaeser, RM AF Facciotti, MT Cheung, VS Lunde, CS Rouhani, S Baliga, NS Glaeser, RM TI Specificity of anion binding in the substrate pocket of bacteriorhodopsin SO BIOCHEMISTRY LA English DT Article ID BOP GENE PROMOTER; CRYSTAL-STRUCTURE; SATURATION MUTAGENESIS; POTASSIUM CHANNEL; D85S MUTANT; TRANSLOCATION; INTERMEDIATE; CHLORIDE; PROTEIN AB The structure of the D85S mutant of bacteriorhodopsin with a nitrate anion bound in the Schiff base binding site and the structure of the anion-free protein have been obtained in the same crystal form. Together with the previously solved structures of this anion pump, in both the anion-free state and bromide-bound state, these new structures provide insight into how this mutant of bacteriorhodopsin is able to bind a variety of different anions in the same binding pocket. The structural analysis reveals that the main structural change that accommodates different anions is the repositioning of the polar side chain of S85. On the basis of these X-ray crystal structures, the prediction is then made that the D85S/D212N double mutant might bind similar anions and do so over a broader pH range than does the single mutant. Experimental comparison of the dissociation constants, K-d, for a variety of anions confirms this prediction and demonstrates, in addition, that the binding affinity is dramatically improved by the D212N substitution. C1 Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Inst Syst Biol, Seattle, WA 98103 USA. RP Glaeser, RM (reprint author), Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. EM nnglaeser@lbl.gov FU NIGMS NIH HHS [GM51487] NR 19 TC 11 Z9 11 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD MAY 4 PY 2004 VL 43 IS 17 BP 4934 EP 4943 DI 10.1021/bi035757s PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 816JL UT WOS:000221106100007 PM 15109251 ER PT J AU Jeon, S Granick, S AF Jeon, S Granick, S TI Rigid DNA chains near nanoparticles SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS LA English DT Article DE DNA; nanoparticle; fluorescence lifetime ID PARTICLES; POLYELECTROLYTES; COMPLEXES AB Two-photon excitation time-resolved fluorescence anisotropy and lifetime measurements were used to study the conformation of DNA near oppositely charged nanoparticles. Negatively-charged rhodamine-labeled DNA was allowed to adsorb onto positively-charged nanoparticles in deionized water and surface-induced fluorescence quenching was observed by measuring the fluorescence lifetime. Fluorescence quenching decreased with the addition of NaCl to the DNA-nanoparticle complex, which implies that the separation of DNA from the nanoparticles increased. However, comparison of fluorescence lifetime decays between free labeled-DNA and the DNA-nanoparticle complex shows that the adsorbed DNA remained less flexible than free labeled-DNA. (C) 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. Univ Illinois, Dept Chem, Urbana, IL 61801 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Jeon, S (reprint author), Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. EM jeons1@ornl.gov NR 12 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-7757 J9 COLLOID SURFACE A JI Colloid Surf. A-Physicochem. Eng. Asp. PD MAY 4 PY 2004 VL 238 IS 1-3 BP 109 EP 112 DI 10.1016/j.colsurfa.2004.02.027 PG 4 WC Chemistry, Physical SC Chemistry GA 829VC UT WOS:000222077400013 ER PT J AU Yin, L Winske, D Daughton, W Coroniti, FV AF Yin, L Winske, D Daughton, W Coroniti, FV TI Electron quasi-viscous effects in collisionless slow-mode shocks SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ION-CYCLOTRON INSTABILITY; SIMULATIONS; RECONNECTION; MAGNETOTAIL; HYBRID; PLASMAS AB The dynamics of collisionless slow-mode shocks are examined using one-dimensional full particle ( kinetic ions and electrons) and hybrid ( kinetic ions, massless fluid electrons) simulations. Full particle simulations indicate that the downstream electron temperature becomes anisotropic (T-\\(e) > T-perpendicular to(e)) at very oblique angles. The anisotropy results from both the large mirror effects and the electron heating due to the parallel electric field of very obliquely propagating kinetic Alfven waves; it gives rise to finite off-diagonal electron pressure tensor terms in the simulation frame. Inclusion of these electron quasi-viscous effects in hybrid simulations allows slow shocks to be set up at very oblique angles, as observed in the distant tail, where dissipation from ion-ion streaming becomes much weaker. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RP Yin, L (reprint author), Los Alamos Natl Lab, Mail Stop B259, Los Alamos, NM 87545 USA. EM lyin@lanl.gov RI Daughton, William/L-9661-2013 NR 19 TC 4 Z9 4 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAY 4 PY 2004 VL 31 IS 9 AR L09803 DI 10.1029/2004GL019567 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 819RS UT WOS:000221333200004 ER PT J AU Berchtold, KA Nie, J Stansbury, JW Hacioglu, B Beckel, ER Bowman, CN AF Berchtold, KA Nie, J Stansbury, JW Hacioglu, B Beckel, ER Bowman, CN TI Novel monovinyl methacrylic monomers containing secondary functionality for ultrarapid polymerization: Steady-state evaluation SO MACROMOLECULES LA English DT Article ID REACTIVE ACRYLIC-MONOMERS; LIGHT-INDUCED POLYMERIZATION; MULTIFUNCTIONAL MONOMERS; PHOTOPOLYMERIZATION; KINETICS; POLYURETHANE; POLYMERS; RESINS; RATES AB Experimental investigations were made into the effects of monomer structure and functionality on free-radical polymerization kinetics. A more comprehensive understanding of how structural characteristics, monomer traits, and polymerization conditions influence the polymerization mechanisms and network evolution was desired. Variations in the nature of the monomers' secondary functionality and the terminal substitution were the primary variables examined. The three factors hypothesized as important to the advantageous polymerization characteristics observed are hydrogen bonding, hydrogen abstraction, and the electronic characteristics of the monomer. The experimental evaluations presented clearly demonstrate that each of these mechanisms contributes to the reactivity of these monomers and the networks that they form. The combination of these factors leads to crosslinked network formation and enhanced polymerization kinetics, i.e., monovinyl monomers with reactivities that rival those of commonly used divinyl monomers. C1 Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA. Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. Univ Colorado, Hlth Sci Ctr, Dept Restorat Dent, Denver, CO 80045 USA. RP Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA. EM Christopher.Bowman@colorado.edu RI Bowman, Christopher/B-1490-2008 OI Bowman, Christopher/0000-0001-8458-7723 NR 29 TC 51 Z9 51 U1 2 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD MAY 4 PY 2004 VL 37 IS 9 BP 3165 EP 3179 DI 10.1021/ma035862 PG 15 WC Polymer Science SC Polymer Science GA 817PS UT WOS:000221190000012 ER PT J AU Wang, Y Ge, S Rafailovich, M Sokolov, J Zou, Y Ade, H Luning, J Lustiger, A Maron, G AF Wang, Y Ge, S Rafailovich, M Sokolov, J Zou, Y Ade, H Luning, J Lustiger, A Maron, G TI Crystallization in the thin and ultrathin films of poly(ethylene-vinyl acetate) and linear low-density polyethylene SO MACROMOLECULES LA English DT Article ID GLASS-TRANSITION TEMPERATURE; MODULATION FORCE MICROSCOPY; POLYMER-FILMS; ISOTACTIC POLYSTYRENE; THICKNESS DEPENDENCE; QUASI-2 DIMENSIONS; CHAIN ORGANIZATION; OXIDIZED SILICON; CRYSTAL-GROWTH; MORPHOLOGY AB The crystallization of poly(ethylene-vinyl acetate) and linear low-density polyethylene (LLDPE) films spun-cast from the polymer/toluene solutions with as-cast thickness from 460 to 10 nm was studied. The lamellar thickness was measured using small-angle X-ray scattering (SAXS) and found to increase from 14 to 21 nm for films thinner than 100 nm. The morphology of LLDPE measured by scanning probe microscopy (SPM) showed an edge-on lamellae for the films thicker than 30 nm and flaton lamellae for the films thinner than 15 nm. A pseudo-"shish-kebab" tiny crystal structure was observed in between the larger lamellae. Crystallinity was confirmed using attenuated total reflectance-Fourier transformed infrared spectroscopy (ATR-FTIR) and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. The shear modulation force microscopy technique (SMFM) was used to measure the melting point, T., which was found to decrease for films thinner than 100 nm. The rate of decrease was a function of the annealing protocol, but in all cases for films approximately 20 nm thick T-m was depressed by 35-40 degreesC. This large value cannot be predicted from the classical Gibbs-Thomson relation, unless a change in the effective heat of fusion is assumed due to surface interactions. C1 SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. ExxonMobil Res & Engn Co, Annandale, NJ 08801 USA. Hebrew Univ Jerusalem, Dept Appl Chem, IL-91904 Jerusalem, Israel. RP SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. EM mrafailovich@otes.cc.sunysb.edu RI Ade, Harald/E-7471-2011 NR 43 TC 95 Z9 97 U1 5 U2 53 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD MAY 4 PY 2004 VL 37 IS 9 BP 3319 EP 3327 DI 10.1021/ma030456b PG 9 WC Polymer Science SC Polymer Science GA 817PS UT WOS:000221190000028 ER PT J AU Segelke, B Knapp, M Kadkhodayan, S Balhorn, R Rupp, B AF Segelke, B Knapp, M Kadkhodayan, S Balhorn, R Rupp, B TI Crystal structure of Clostridium botulinum neurotoxin protease in a product-bound state: Evidence for noncanonical zinc protease activity SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID LIGHT-CHAIN; SUBSTRATE-SPECIFICITY; ELECTRON-DENSITY; TETANUS TOXIN; B NEUROTOXIN; CLEAVAGE; SYNAPTOBREVIN; INHIBITION; TOXICITY; PEPTIDE AB Clostridium botulinum neurotoxins (BoNTs), the most potent toxins known, disrupt neurotransmission through proteolysis of proteins involved in neuroexocytosis. The light chains of BoNTs are unique zinc proteases that have stringent substrate specificity and require exceptionally long substrates. We have determined the crystal structure of the protease domain from BoNT serotype A (BoNT/A). The structure reveals a homodimer in a product-bound state, with loop F242-V257 from each monomer deeply buried in its partner's catalytic site. The loop, which acts as a substrate, is oriented in reverse of the canonical direction for other zinc proteases. The Y249-Y250 peptide bond of the substrate loop is hydrolyzed, leaving the Y249 product carboxylate coordinated to the catalytic zinc. From the crystal structure of the BoNT/A protease, detailed models of noncanonical binding and proteolysis can be derived which we propose are also consistent with BoNT/A binding and proteolysis of natural substrate synaptosome-associated protein of 25 kDa (SNAP-25). The proposed BoNT/A substrate-binding mode and catalytic mechanism are markedly different from those previously proposed for the BoNT serotype B. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Chiron Corp, Emeryville, CA 94608 USA. Genentech Inc, San Francisco, CA 94080 USA. RP Rupp, B (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94551 USA. EM br@llnl.gov NR 33 TC 71 Z9 72 U1 0 U2 3 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD MAY 4 PY 2004 VL 101 IS 18 BP 6888 EP 6893 DI 10.1073/pnas.0400584101 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 818SO UT WOS:000221265000012 PM 15107500 ER PT J AU Shi, Z Wynblatt, P Srinivasan, SG AF Shi, Z Wynblatt, P Srinivasan, SG TI Melting behavior of nanosized lead particles embedded in an aluminum matrix SO ACTA MATERIALIA LA English DT Article DE MD simulation; Al-Pb alloy; nanocrystalline microstructure; melting point elevation ID NANOSCALE PB INCLUSIONS; AL; CLUSTERS; LIQUID; POTENTIALS; SURFACE; POINT; NANOCRYSTALS; NUCLEATION; INTERFACES AB Molecular dynamics (MD) simulations, employing semi-empirical glue-type (similar to embedded atom method) many-body potentials, have been used to model the melting behavior of nanosized Pb particles embedded in an Al matrix. All the Pb particles studied melt well above the bulk melting temperature, with the melting point elevation displaying a damped periodic trend with increasing Pb particle size. By inspecting snapshots derived from the simulations, it is also possible to conclude that melting occurs via nucleation at {100} interfaces. A phenomenological model, based oil the consideration of interfacial energy, volume expansion and lattice mismatch, has been developed to describe this interesting melting behavior. Our model leads to the conclusion that the periodic variation of melting point with size is due to an oscillatory strain energy contribution arising from the large size mismatch of Pb and Al atoms. (C) 2004 Published by Elsevier Ltd on behalf of Acta Materialia Inc. C1 Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Wynblatt, P (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. EM pw0l@andrew.cmu.edu NR 45 TC 19 Z9 19 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY 3 PY 2004 VL 52 IS 8 BP 2305 EP 2316 DI 10.1016/j.actamat.2004.01.021 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 820JS UT WOS:000221385600019 ER PT J AU Misra, A Hirth, JP Hoagland, RG Embury, JD Kung, H AF Misra, A Hirth, JP Hoagland, RG Embury, JD Kung, H TI Dislocation mechanisms and symmetric slip in rolled nano-scale metallic multilayers SO ACTA MATERIALIA LA English DT Article DE rolling; metallic multilayers; dislocation substructures; texture; sputter deposition ID THIN-FILMS; CU; DEFORMATION; STRAIN AB Self-supported Cu-Nb multilayered foils, synthesized by sputter deposition, show significantly different deformation behavior during rolling when the as-deposited individual layer thickness is in the few tens of nanometers range as compared to the micrometer-scale. While the rolled micrometer-scale multilayers exhibit dislocation cell structure formation and large lattice rotations of the interface plane normal, the nano-scale multilayers reveal no dislocation cell structures and insignificant rotations of the interface normal. The observed behavior following large plastic strains is interpreted in terms of dislocation mechanisms of deformation in nano-scale laminates that result in symmetric slip. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Misra, A (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA. EM amisra@lanl.gov RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012 NR 15 TC 86 Z9 87 U1 0 U2 28 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAY 3 PY 2004 VL 52 IS 8 BP 2387 EP 2394 DI 10.1016/j.actamat.2004.01.029 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 820JS UT WOS:000221385600027 ER PT J AU Wilson, MD Rocke, DM Durbin, B Kahn, HD AF Wilson, MD Rocke, DM Durbin, B Kahn, HD TI Detection limits and goodness-of-fit measures for the two-component model of chemical analytical error SO ANALYTICA CHIMICA ACTA LA English DT Article DE chemical analytical error; limits of detection; two-component error models; goodness-of-fit ID QUANTIFICATION; CALIBRATION AB The utility of analytical chemistry measurements in most applications is dependent on an assessment of measurement error. This paper demonstrates the use of a two-component error model in setting limits of detection and related concepts and introduces two goodness-of-fit statistics for assessing the appropriateness of the model for the data at hand. The model is applicable to analytical methods in which high concentrations are measured with approximately constant relative standard deviation. At low levels, the relative standard deviation cannot stay constant, since this implies vanishingly small absolute standard deviation. The two-component model has approximately constant standard deviation near zero concentration, and approximately constant relative standard deviation at high concentrations, a pattern that is frequently observed in practice. Here we discuss several important applications of the model to environmental monitoring and also introduce two goodness-of-fit statistics, to ascertain whether the data exhibit the error structure assumed by the model, as well as to took for problems with experimental design. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Calif Davis, Davis, CA 95616 USA. US EPA, Washington, DC 20460 USA. RP Wilson, MD (reprint author), Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. RI Rocke, David/I-7044-2013; OI Rocke, David/0000-0002-3958-7318; Wilson, Machelle/0000-0003-1734-2755 NR 17 TC 11 Z9 11 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD MAY 3 PY 2004 VL 509 IS 2 BP 197 EP 208 DI 10.1016/j.aca.2003.12.047 PG 12 WC Chemistry, Analytical SC Chemistry GA 806MZ UT WOS:000220439300009 ER PT J AU Andre, CL Boeckl, JJ Wilt, DM Pitera, AJ Lee, ML Fitzgerald, EA Keyes, BM Ringel, SA AF Andre, CL Boeckl, JJ Wilt, DM Pitera, AJ Lee, ML Fitzgerald, EA Keyes, BM Ringel, SA TI Impact of dislocations on minority carrier electron and hole lifetimes in GaAs grown on metamorphic SiGe substrates SO APPLIED PHYSICS LETTERS LA English DT Article ID BUFFER LAYERS; SOLAR-CELLS; QUALITY GAAS; MOBILITY AB The minority carrier lifetime of electrons (tau(n)) in p-type GaAs double heterostructures grown on GaAs substrates and compositionally graded Ge/Si1-xGex/Si (SiGe) substrates with varying threading dislocation densities (TDDs) were measured at room temperature using time-resolved photoluminescence. The electron lifetimes for homoepitaxial GaAs and GaAs grown on SiGe (TDDsimilar to1x10(6) cm(-2)) with a dopant concentration of 2x10(17) cm(-3) were similar to21 and similar to1.5 ns, respectively. The electron lifetime measured on SiGe was substantially lower than the previously measured minority carrier hole lifetime (tau(p)) of similar to10 ns, for n-type GaAs grown on SiGe substrates with a similar residual TDD and dopant concentration. The reduced lifetime for electrons is a consequence of their higher mobility, which yields an increased sensitivity to the presence of dislocations in GaAs grown on metamorphic buffers. The disparity in dislocation sensitivity for electron and hole recombination has significant implications for metamorphic III-V devices. (C) 2004 American Institute of Physics. C1 Ohio State Univ, Dept Elect Engn, Columbus, OH 43210 USA. NASA, Glenn Res Ctr, Photovolta & Space Environm Branch, Cleveland, OH 44135 USA. MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Ringel, SA (reprint author), Ohio State Univ, Dept Elect Engn, Columbus, OH 43210 USA. EM ringel@ece.eng.osu.edu RI Lee, Minjoo/A-9720-2008 OI Lee, Minjoo/0000-0002-3151-3808 NR 22 TC 42 Z9 42 U1 0 U2 13 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3447 EP 3449 DI 10.1063/1.1736318 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500005 ER PT J AU Ahluwalia, R Lookman, T Saxena, A Cao, W AF Ahluwalia, R Lookman, T Saxena, A Cao, W TI Piezoelectric response of engineered domains in ferroelectrics SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTALS; BARIUM-TITANATE AB We study the formation of engineered ferroelectric domains in two dimensions based on a continuum approach that incorporates the long-range elastic and electrostatic interactions. The model is also used to simulate the piezoelectric properties of the engineered domain configurations and the response is compared with that of an analogous single domain state. The results show that the low field piezoelectric constants for the engineered configuration are very close to those obtained for the corresponding single domain state and the domain wall influence is not significant. For high fields, domain walls act as nucleation sites for an electric field induced structural transition. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA. Penn State Univ, Dept Math, University Pk, PA 16802 USA. RP Ahluwalia, R (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM rajeev@viking.lanl.gov RI Cao, Wenwu/F-6091-2012 OI Cao, Wenwu/0000-0002-2447-1486 NR 11 TC 17 Z9 17 U1 0 U2 12 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3450 EP 3452 DI 10.1063/1.1737059 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500006 ER PT J AU Jiang, CS Noufi, R AbuShama, JA Ramanathan, K Moutinho, HR Pankow, J Al-Jassim, MM AF Jiang, CS Noufi, R AbuShama, JA Ramanathan, K Moutinho, HR Pankow, J Al-Jassim, MM TI Local built-in potential on grain boundary of Cu(In,Ga)Se-2 thin films SO APPLIED PHYSICS LETTERS LA English DT Article ID SOLAR-CELLS; EFFICIENCY; MICROSCOPY AB We report on a direct measurement of two-dimensional potential distribution on the surface of photovoltaic Cu(In,Ga)Se-2 thin films using a nanoscale electrical characterization of scanning Kelvin probe microscopy. The potential measurement reveals a higher surface potential or a smaller work function on grain boundaries of the film than on the grain surfaces. This demonstrates the existence of a local built-in potential on grain boundaries, and the grain boundary is positively charged. The local built-in potential on the grain boundary is expected to increase the minority-carrier collection area from one to three dimensional. In addition, a work function decrease induced by Na on the film surface was observed. (C) 2004 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Jiang, CS (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. EM chun_sheng_jiang@nrel.gov RI jiang, chun-sheng/F-7839-2012 NR 15 TC 122 Z9 123 U1 1 U2 25 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3477 EP 3479 DI 10.1063/1.1737796 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500015 ER PT J AU Li, Q Suenaga, M Ye, Z Foltyn, SR Wang, H AF Li, Q Suenaga, M Ye, Z Foltyn, SR Wang, H TI Crossover of thickness dependence of critical current density J(c)(T,H) in YBa2Cu3O7-delta thick films SO APPLIED PHYSICS LETTERS LA English DT Article ID MGB2/MG NANO-COMPOSITES; MAGNETIC-FIELD; AC LOSSES; DEPOSITION; SUPERCONDUCTORS; DISKS AB Critical current density J(c) as a function of temperature T and magnetic field H was studied for high quality YBa2Cu3O7-delta (YBCO) films with thickness d=0.2, 1, and 3 mum by means of magnetization measurements of a circular disk in perpendicular field. We found that the thickness dependence of J(c)(H) for the YBCO thick films crossovers at high fields for T>50 K, where the 0.2-mum-thick film carries significantly lower J(c)(H) than the 3-mum-thick film at high fields, even though the zero- or low-field J(c) for the 0.2-mum-thick film is more than twice the value for the 3-mum-thick film. (C) 2004 American Institute of Physics. C1 Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Li, Q (reprint author), Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA. EM qiangli@bnl.gov RI Wang, Haiyan/P-3550-2014 OI Wang, Haiyan/0000-0002-7397-1209 NR 21 TC 21 Z9 21 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3528 EP 3530 DI 10.1063/1.1737067 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500032 ER PT J AU Kim, YJ Thevuthasan, S Droubay, T Lea, AS Wang, CM Shutthanandan, V Chambers, SA Sears, RP Taylor, B Sinkovic, B AF Kim, YJ Thevuthasan, S Droubay, T Lea, AS Wang, CM Shutthanandan, V Chambers, SA Sears, RP Taylor, B Sinkovic, B TI Growth and properties of molecular beam epitaxially grown ferromagnetic Fe-doped TiO2 rutile films on TiO2(110) SO APPLIED PHYSICS LETTERS LA English DT Article ID ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; COBALT DISTRIBUTION; SPINTRONICS AB We have grown epitaxial Fe-doped TiO2 rutile films on rutile TiO2(110) substrates, and have explored the resulting compositional, structural, morphological and magnetic properties. Clusters of mixed TiO2 rutile and Fe3O4 form on the surface of a continuous rutile epitaxial film during growth. Room-temperature ferromagnetism is observed, and is associated with the formation of secondary phase Fe3O4 rather than a true diluted magnetic oxide semiconductor. (C) 2004 American Institute of Physics. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. Hanbat Natl Univ, Dept Chem Technol, Taejon, South Korea. Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. RP Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. EM theva@pnl.gov RI Droubay, Tim/D-5395-2016; OI Droubay, Tim/0000-0002-8821-0322; Lea, Alan/0000-0002-4232-1553 NR 23 TC 64 Z9 65 U1 1 U2 20 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3531 EP 3533 DI 10.1063/1.1703845 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500033 ER PT J AU Funsten, HO Ritzau, SM Harper, RW Korde, R AF Funsten, HO Ritzau, SM Harper, RW Korde, R TI Fundamental limits to detection of low-energy ions using silicon solid-state detectors SO APPLIED PHYSICS LETTERS LA English DT Article ID SURFACE-BARRIER DETECTOR; PHOTODIODES; ELECTRONS; STABILITY; PLASMA AB Recent advances in solid-state detector (SSD) technology have demonstrated the detection of ions and electrons down to 1 keV. However, ions at keV energies lose a substantial amount of energy Delta(N) in a SSD through Coulombic interactions with target nuclei rather than through interactions that contribute to the SSD output pulse, whose magnitude is a measure of the ion's incident energy. Because Delta(N) depends on the ion species, detector material, and interaction physics, it represents a fundamental limitation of the output pulse magnitude of the detector. Using 100% quantum collection efficiency silicon photodiodes with a thin (40-60 Angstrom) SiO2 passivation layer, we accurately quantify Delta(N) for incident 1-120 keV ions and, therefore, evaluate the detection limits of keV ions using silicon detectors. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Int Radiat Detectors Inc, Torrance, CA 90505 USA. RP Funsten, HO (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM hfunsten@lanl.gov RI Funsten, Herbert/A-5702-2015 OI Funsten, Herbert/0000-0002-6817-1039 NR 17 TC 23 Z9 23 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3552 EP 3554 DI 10.1063/1.1719272 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500040 ER PT J AU Liao, XZ Srinivasan, SG Zhao, YH Baskes, MI Zhu, YT Zhou, F Lavernia, EJ Xu, HF AF Liao, XZ Srinivasan, SG Zhao, YH Baskes, MI Zhu, YT Zhou, F Lavernia, EJ Xu, HF TI Formation mechanism of wide stacking faults in nanocrystalline Al SO APPLIED PHYSICS LETTERS LA English DT Article ID PLASTIC-DEFORMATION; ROOM-TEMPERATURE; DISLOCATIONS; METALS; ALUMINUM; NICKEL AB A full dislocation often dissociates into two partial dislocations enclosing a stacking fault (SF) ribbon. The SF width significantly affects the mechanical behavior of metals. Al has very high stacking fault energy and, consequently, very narrow SF width in its coarse-grained state. We have found that some SFs in nanocrystalline Al are surprisingly 1.4-6.8 nm wide, which is 1.5-11 times higher than the reported experimental value in single crystal Al. Our analytical model shows that such wide SFs are formed due to the small grain size and possibly also to the interaction of SF ribbons with high density of dislocations. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM yzhu@lanl.gov RI Zhu, Yuntian/B-3021-2008; Zhao, Yonghao/A-8521-2009; Liao, Xiaozhou/B-3168-2009; Lujan Center, LANL/G-4896-2012; Lavernia, Enrique/I-6472-2013 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; Lavernia, Enrique/0000-0003-2124-8964 NR 22 TC 115 Z9 119 U1 10 U2 47 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3564 EP 3566 DI 10.1063/1.1734689 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500044 ER PT J AU Li, JB Wang, LW AF Li, JB Wang, LW TI First principle study of core/shell structure quantum dots SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRONIC-STRUCTURE; CDSE NANOCRYSTALS; SUPERLATTICES AB The electronic states of core/shell CdSe/CdS and CdSe/CdTe heterostructure quantum dots are studied by large-scale first-principles calculations. According to their natural band-offset alignments CdSe/CdS is a type-I heterostructure and CdSe/CdTe is a type-II heterostructure. We found that, the electron state changes very little, but the hole wave function in CdSe/CdS quantum dots has been localized within the core, while the hole wave function in CdSe/CdTe quantum dots is localized within the shell. The hole state in CdSe/CdTe quantum dots has drastically different characteristics as in CdSe and CdSe/CdS quantum dots. The band alignment, strain effect, and quantum confinement are all important to determine the electronic structures of these systems. (C) 2004 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. RP Li, JB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. EM lwwang@lbl.gov NR 16 TC 82 Z9 85 U1 2 U2 43 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3648 EP 3650 DI 10.1063/1.1737470 PG 3 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500072 ER PT J AU Dorf, L Raitses, Y Fisch, NJ Semenov, V AF Dorf, L Raitses, Y Fisch, NJ Semenov, V TI Effect of anode dielectric coating on Hall thruster operation (vol 84, pg 1070, 2004) SO APPLIED PHYSICS LETTERS LA English DT Correction C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603600, Russia. RP Dorf, L (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 3 PY 2004 VL 84 IS 18 BP 3702 EP 3702 DI 10.1063/1.1734680 PG 1 WC Physics, Applied SC Physics GA 815SR UT WOS:000221062500090 ER PT J AU Hess, H Bachand, GD Vogel, V AF Hess, H Bachand, GD Vogel, V TI Powering nanodevices with biomolecular motors SO CHEMISTRY-A EUROPEAN JOURNAL LA English DT Article DE molecular devices; motor proteins; nanostructures; nanotechnology; surface chemistry ID SINGLE KINESIN MOLECULES; MICROTUBULE MOVEMENTS; SELF-ORGANIZATION; DNA-MOLECULES; MOTILITY; SURFACES; PROTEIN; NANOSCALE; SHUTTLES; TRACKS AB Biomolecular motors, in particular motor proteins, are ideally suited to introduce chemically powered movement of selected components into devices engineered at the micro- and nanoscale level. The design of such hybrid "bio/nano "-devices requires suitable synthetic environments, and the identification of unique applications. We discuss current approaches to utilize active transport and actuation on a molecular scale, and we give an outlook to the future. C1 Univ Washington, Dept Bioengn, Seattle, WA 98195 USA. Univ Washington, Ctr Nanotechnol, Seattle, WA 98195 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Univ Washington, Dept Bioengn, Bagley Hall,Room 406,Box 351721, Seattle, WA 98195 USA. EM hhess@u.washington.edu RI Hess, Henry/A-5224-2008; Vogel, Viola/O-8025-2015; OI Hess, Henry/0000-0002-5617-606X; Vogel, Viola/0000-0003-2898-7671; Bachand, George/0000-0002-3169-9980 NR 57 TC 171 Z9 174 U1 5 U2 52 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 0947-6539 EI 1521-3765 J9 CHEM-EUR J JI Chem.-Eur. J. PD MAY 3 PY 2004 VL 10 IS 9 BP 2110 EP 2116 DI 10.1002/chem.200305712 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA 818WN UT WOS:000221275300001 PM 15112199 ER PT J AU Howell, SL Matthewson, BJ Polson, MIJ Burrell, AK Gordon, KC AF Howell, SL Matthewson, BJ Polson, MIJ Burrell, AK Gordon, KC TI Structural changes upon reduction of dipyrido[2,3-a : 3 ',2 '-c]phenazine probed by vibrational spectroscopy, ab initio calculations, and deuteration studies SO INORGANIC CHEMISTRY LA English DT Article ID TRANSITION-METAL-COMPLEXES; RESONANCE-RAMAN-SPECTROSCOPY; MLCT EXCITED-STATE; BIS(2,9-DIMETHYL-1,10-PHENANTHROLINE)COPPER(I) NITRATE; ELECTRONIC-STRUCTURES; MOLECULAR-STRUCTURES; COPPER(I) COMPLEXES; CRYSTAL-STRUCTURE; INFRARED-SPECTRA; LIGHT SWITCH AB A series of bridging ligands, dipyrido[2,3-a:3',2'-c]phenazine (ppb), dipyrido[2,3-a:3',2'-c]-6,7-dichlorophenazine (ppbCl(2)), and dipyrido[2,3-a:3',2'-c]-6,7-dimethylphenazine (ppbMe(2)), and their binuclear copper(l) complexes have been synthesized, and their spectral properties were measured. The single-crystal structure of the complex, [(PPh3)(2)Cu(mu-ppbCl(2))Cu(PPh3)(2)](BF4)(2) in the monoclinic space group P21/c, 18.2590(1), 21.1833(3), 23.2960(3) Angstrom with Z = 4 is reported. The copper(l) complexes are deeply colored through MLCT transitions in the visible region. The vibrational spectra of the ligands have been modeled using ab initio hybrid density functional theory (DFT) methods (B3LYP/6-31G(d)) and compared to experimental FT-Raman and IR data. The DFT calculations are used to interpret the resonance Raman spectra, and thus the electronic spectra, of the complexes. The preferential enhancement of modes associated with the phenanthroline section of the ligands with blue excitation (lambda(exc) = 457.9 nm) over phenazine-based modes with redder excitation (lambda(exc) = 514.5 and 632.8 nm) suggests the 2 MLCT transitions terminated on different unoccupied MOs are present under the visible absorption envelope. The radical anion species of the ligands are prepared by the electrochemical reduction of the binuclear copper(l) complexes; no evidence of dechelation prevalent in other copper(l) complexes is observed. The resonance Raman spectra of the reduced complexes are dramatically different from those of the parent species. Across the series common bands are observed at about 1590 and 1570 cm(-1) which do not shift with reduction but are altered in intensity. The normal-mode analysis of the radical anion species suggests that these normal modes primarily involve bond length distortions that are unaffected by reduction. C1 Univ Otago, Dept Chem, Dunedin, New Zealand. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Univ Otago, Dept Chem, Union Pl, Dunedin, New Zealand. EM kgordon@alkali.otago.ac.nz RI Gordon, Keith/B-7149-2008; OI Polson, Matthew/0000-0002-3067-8520; Gordon, Keith/0000-0003-2833-6166 NR 57 TC 25 Z9 25 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD MAY 3 PY 2004 VL 43 IS 9 BP 2876 EP 2887 DI 10.1021/ic0302251 PG 12 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 817HG UT WOS:000221168000020 PM 15106975 ER PT J AU Holladay, JD Wainright, JS Jones, EO Gano, SR AF Holladay, JD Wainright, JS Jones, EO Gano, SR TI Power generation using a mesoscale fuel cell integrated with a microscale fuel processor SO JOURNAL OF POWER SOURCES LA English DT Article DE proton exchange membrane fuel cells; polybenzimidazole; microtechnology; fuel processing AB An integrated fuel reformer and fuel cell system for microscale (10-500 mW) power generation is being developed and demonstrated as an alternative to conventional batteries. In this system, thermal energy is transformed to electricity by stripping the hydrogen from the hydrocarbon fuel (reforming) and converting the hydrogen to electricity in a proton exchange membrane (PEM) fuel cell. The fabrication and operation of a mesoscale fuel cell based on phosphoric acid doped polybenzimidazole (PBI) technology is discussed, along with tests integrating the methanol processor with the fuel cell. The PBI membrane had high ionic conductivity at high temperatures (>150 degreesC), and sustained the high conductivity at low relative humidity at these temperatures. This high-temperature stability and high ionic conductivity enabled the membrane to tolerate extremely high levels of carbon monoxide up to 10% without significant degradation in performance. The combined fuel cell/reformer system was successfully operated to enable the production of 23 mW of electrical power. (C) 2004 Elsevier B.V. All rights reserved. C1 Battelle Mem Inst, Pacific NW Div, Richland, WA USA. Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA. RP Holladay, JD (reprint author), POB 999,MS K8-93, Richland, WA 99352 USA. EM jamelyn.holladay@pnl.gov NR 15 TC 76 Z9 77 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 3 PY 2004 VL 130 IS 1-2 BP 111 EP 118 DI 10.1016/j.jpowsour.2003.11.055 PG 8 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 814WW UT WOS:000221005800015 ER PT J AU Khaleel, MA Lin, Z Singh, P Surdoval, W Collin, D AF Khaleel, MA Lin, Z Singh, P Surdoval, W Collin, D TI A finite element analysis modeling tool for solid oxide fuel cell development: coupled electrochemistry, thermal and flow analysis in MARC((R)) SO JOURNAL OF POWER SOURCES LA English DT Article DE solid oxide fuel cell; finite element method; computer modeling; electrochemical reaction; thermal analysis; flow model ID STACKS AB A 3D simulation tool for modeling solid oxide fuel cells is described. The tool combines the versatility and efficiency of a commercial finite element analysis code, MARC((R)), with an in-house developed robust and flexible electrochemical (EC) module. Based upon characteristic parameters obtained experimentally and assigned by the user, the EC module calculates the current density distribution, heat generation, and fuel and oxidant species concentration, taking the temperature profile provided by MARC((R)) and operating conditions such as the fuel and oxidant flow rate and the total stack output voltage or current as the input. MARC((R)) performs flow and thermal analyses based on the initial and boundary thermal and flow conditions and the heat generation calculated by the EC module. The main coupling between MARC((R)) and EC is for MARC((R)) to supply the temperature field to EC and for EC to give the heat generation profile to MARC((R)). The loosely coupled, iterative scheme is advantageous in terms of memory requirement, numerical stability and computational efficiency. The coupling is iterated to self-consistency for a steady-state solution. Sample results for steady states as well as the startup process for stacks with different flow designs are presented to illustrate the modeling capability and numerical performance characteristic of the simulation tool. (C) 2004 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Engn Mech Grp Lab, Richland, WA 99352 USA. Natl Energy Technol Lab, Morgantown, WV 26507 USA. RP Khaleel, MA (reprint author), Pacific NW Natl Engn Mech Grp Lab, POB 999,Mail Stop K2-18, Richland, WA 99352 USA. EM moe.khaleel@pnl.gov RI Lin, Zijing/D-4050-2009; Singh, Prabhakar/M-3186-2013; OI khaleel, mohammad/0000-0001-7048-0749 NR 13 TC 118 Z9 120 U1 2 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 3 PY 2004 VL 130 IS 1-2 BP 136 EP 148 DI 10.1016/j.jpowsour.2003.11.074 PG 13 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 814WW UT WOS:000221005800018 ER PT J AU Ahluwalia, RK Wang, X Rousseau, A Kumar, R AF Ahluwalia, RK Wang, X Rousseau, A Kumar, R TI Fuel economy of hydrogen fuel cell vehicles SO JOURNAL OF POWER SOURCES LA English DT Article DE fuel economy; hydrogen fuel cell; light-duty vehicles AB On the basis of on-road energy consumption, fuel economy (FE) of hydrogen fuel cell light-duty vehicles is projected to be 2.5-2.7 times the fuel economy of the conventional gasoline internal combustion engine vehicles (ICEV) on the same platforms. Even with a less efficient but higher power density 0.6 V per cell than the base case 0.7 V per cell at the rated power point, the hydrogen fuel cell vehicles are projected to offer essentially the same fuel economy multiplier. The key to obtaining high fuel economy as measured on standardized urban and highway drive schedules lies in maintaining high efficiency of the fuel cell (FC) system at low loads. To achieve this, besides a high performance fuel cell stack, low parasitic losses in the air management system (i.e., turndown and part load efficiencies of the compressor-expander module) are critical. (C) 2004 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Ahluwalia, RK (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM walia@anl.gov NR 7 TC 52 Z9 58 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 3 PY 2004 VL 130 IS 1-2 BP 192 EP 201 DI 10.1016/j.jpowsour.2003.12.061 PG 10 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 814WW UT WOS:000221005800024 ER PT J AU Shim, JP Striebel, KA AF Shim, JP Striebel, KA TI The dependence of natural graphite anode performance on electrode density SO JOURNAL OF POWER SOURCES LA English DT Article; Proceedings Paper CT International Meeting on Lithium Batteries CY JUN, 2002 CL Monterey, CA DE lithium ion battery; intercalation; irreversible capacity loss; natural graphite; electrode density ID LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCE; IRREVERSIBLE CAPACITY; NEGATIVE ELECTRODE; CARBON ELECTRODES; PARTICLE-SIZE; INTERCALATION; DIFFUSION AB The effect of electrode density for lithium intercalation and irreversible capacity loss on the natural graphite anode in lithium ion batteries was studied by electrochemical methods. Both the first-cycle reversible and irreversible capacities of the natural graphite anode decreased with an increase in the anode density though compression. The reduction in reversible capacity was attributed to a reduction in the chemical diffusion coefficient for lithium through partially agglomerated particles with a larger stress. For the natural graphite in this study the potentials for Li (de)insertion shifted between the first and second formation cycles and the extent of this shift was dependent on electrode density. The relation between this peak shift and the irreversible capacity loss is probably due to the decrease in graphite surface area with compression. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Striebel, KA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. EM kastriebel@lbl.gov NR 27 TC 41 Z9 41 U1 3 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-7753 J9 J POWER SOURCES JI J. Power Sources PD MAY 3 PY 2004 VL 130 IS 1-2 BP 247 EP 253 DI 10.1016/j.jpowsour.2003.12.015 PG 7 WC Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary SC Chemistry; Electrochemistry; Energy & Fuels; Materials Science GA 814WW UT WOS:000221005800032 ER PT J AU Lima, GF Lepine-Szily, A Villari, ACC Mittig, W Lichtenthaler, R Chartier, M Orr, NA Angelique, JC Audi, G Baldini-Neto, E Carlson, BV Casandjian, JM Cunsolo, A Donzaud, C Foti, A Gillibert, A Hirata, D Lewitowicz, M Lukyanov, S MacCormick, M Morrissey, DJ Ostrowski, AN Sherrill, BM Stephan, C Suomijarvi, T Tassan-Got, L Vieira, DJ Wouters, JM AF Lima, GF Lepine-Szily, A Villari, ACC Mittig, W Lichtenthaler, R Chartier, M Orr, NA Angelique, JC Audi, G Baldini-Neto, E Carlson, BV Casandjian, JM Cunsolo, A Donzaud, C Foti, A Gillibert, A Hirata, D Lewitowicz, M Lukyanov, S MacCormick, M Morrissey, DJ Ostrowski, AN Sherrill, BM Stephan, C Suomijarvi, T Tassan-Got, L Vieira, DJ Wouters, JM TI Reaction cross section and matter radius measurements of proton-rich Ga, Ge, As, Se and Br nuclides SO NUCLEAR PHYSICS A LA English DT Article DE nuclear reactions Si(Ga-63, X), (Ga-64, X), (Ga-65, X), (Ga-66, X), (Ga-67, X), (Ga-68, X), (Ge-65, X), (Ge-66, X), (Ge-67, X), (Ge-68, X); (Ge-69, X), (Ge-70, X), (As-67, X), (As-68, X), (As-69, X), (As-70, X); (As-71, X), ((72)s, X), (Se-69, X), (Se-70, X), (Se-71, X), (Se-72, X), (Se-73; X), (Br-72, X), (Br-73, X), (Br-74, X), (Br-75, X), E similar to 50-60 MeV/nucleon; measured reaction sigma; deduced matter radii; Glauber model analysis ID INTERMEDIATE-ENERGY; EXOTIC NUCLEI; CHARGE RADII; HALO NUCLEI; ISOTOPES; BREAKUP; B-8; DISTRIBUTIONS; SPECTROSCOPY; SCATTERING AB Proton-rich isotopes of Ga, Ge, As, Se and Br had their total reaction cross sections (sigma(R)) measured. Root-mean-squared matter radii were determined from Glauber model calculations, which reproduced the experimental sigma(R) values. For all isotopic series a decrease of the r(rms) with increasing neutron number was observed. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil. FACENS, BR-18001970 Sorocaba, SP, Brazil. GANIL, F-14021 Caen, France. Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England. ISMRA Univ Caen, CNRS, IN2P3, LPC, F-14050 Caen, France. Univ Caen, F-14050 Caen, France. CSNSM, CNRS, IN2P3, F-91405 Orsay, France. UPS, F-91405 Orsay, France. Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Jose Dos Campos, Brazil. Ist Nazl Fis Nucl, I-95129 Catania, Italy. Inst Phys Nucl, F-91406 Orsay, France. CENS, CEA, DSM, DAPNIA,SPhN, F-91191 Gif Sur Yvette, France. Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England. Joint Inst Nucl Res, LNR, Moscow 101000, Russia. Michigan State Univ, NSCL, E Lansing, MI 48824 USA. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lepine-Szily, A (reprint author), Univ Sao Paulo, Inst Fis, CP 66318, BR-05315970 Sao Paulo, Brazil. EM alinka.lepine@dfn.if.usp.br RI Sherrill, Bradley/B-4098-2009; Sherrill, Bradley/B-3378-2011; Lepine-Szily , Alinka/I-3325-2012; Carlson, Brett/I-2168-2013; Lichtenthaler, Rubens/K-7278-2012; Hirata, Daisy/F-3199-2013 OI Lepine-Szily , Alinka/0000-0001-6640-8824; Carlson, Brett/0000-0003-4756-2230; Lichtenthaler, Rubens/0000-0001-8317-2630; NR 44 TC 20 Z9 20 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD MAY 3 PY 2004 VL 735 IS 3-4 BP 303 EP 328 DI 10.1016/j.nuclphysa.2004.01.125 PG 26 WC Physics, Nuclear SC Physics GA 812DH UT WOS:000220819700001 ER PT J AU Ghinculov, A Hurth, T Isidori, G Yao, YP AF Ghinculov, A Hurth, T Isidori, G Yao, YP TI The rare decay B -> Xsl(+)l(-) to NNLL precision for arbitrary dilepton invariant mass SO NUCLEAR PHYSICS B LA English DT Article ID NONPERTURBATIVE CORRECTIONS; VIRTUAL CORRECTIONS; LEADING LOGARITHMS; QCD-CORRECTIONS; STANDARD MODEL; B->S-GAMMA; B->X(S)L(+)L(-); B->S+GAMMA AB We present a new phenomenological analysis of the inclusive rare decay B --> X(s)l(+)l(-). In particular, we present the first calculation of the NNLL contributions due to the leading two-loop matrix elements, evaluated for arbitrary dilepton invariant mass. This allows to obtain the first NNLL estimates of the dilepton mass spectrum and the lepton forward-backward asymmetry in the high M-l+l-(2) region, and to provide an independent check of previously published results in the low M-l+l-(2) region. The numerical impact of these NNLL corrections in the high-mass region (M-l+l-(2) > 14.4 GeV2) amounts to -13% in the integrated rate, and leads to a reduction of the scale uncertainty to +/-3%. The impact of non-perturbative contributions in this region is also discussed in detail. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Rochester, Dept Phys, Rochester, NY 14627 USA. CERN, Div Theoret Phys, CH-1211 Geneva 23, Switzerland. Stanford Univ, SLAC, Stanford, CA 94309 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Michigan, Ctr Theoret Phys, Ann Arbor, MI 48109 USA. RP Isidori, G (reprint author), Univ Rochester, Dept Phys, 601 Elmwood Ave, Rochester, NY 14627 USA. EM isidori@lnf.infn.it NR 53 TC 90 Z9 90 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 3 PY 2004 VL 685 BP 351 EP 392 DI 10.1016/j.nuclphysb.2004.02.028 PG 42 WC Physics, Particles & Fields SC Physics GA 815AP UT WOS:000221015500010 ER PT J AU Schultz, IR Merdink, JL Gonzalez-Leon, A Bull, RJ AF Schultz, IR Merdink, JL Gonzalez-Leon, A Bull, RJ TI Dichloroacetate toxicokinetics and disruption of tyrosine catabolism in B6C3F1 mice: dose-response relationships and age as a modifying factor (vol 173, pg 229, 2002) SO TOXICOLOGY LA English DT Correction C1 Battelle PNNL, Mol Biosci Div, Richland, WA 99352 USA. RP Schultz, IR (reprint author), Battelle PNNL, Mol Biosci Div, POB 99-P7-56, Richland, WA 99352 USA. EM ir_schultz@pnl.gov; jim.merdink@lcresources.com; agonzalezl@cascabel.ciad.mx; rjrdbull2@bossig.com NR 1 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0300-483X J9 TOXICOLOGY JI Toxicology PD MAY 3 PY 2004 VL 197 IS 3 BP 263 EP 264 DI 10.1016/j.tox.2004.01.001 PG 2 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 807YR UT WOS:000220537300007 ER PT J AU Reed, BW Minich, RW Rudd, RE Kumar, M AF Reed, BW Minich, RW Rudd, RE Kumar, M TI The structure of the cubic coincident site lattice rotation group SO ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES LA English DT Article ID GRAIN-BOUNDARY STATISTICS; PATTERN-SHIFT LATTICES; TRIPLE JUNCTIONS; FCC CRYSTALS; POLYCRYSTALS; TOPOLOGY; DISTRIBUTIONS; NETWORKS; TEXTURE AB This work is intended to be a mathematical underpinning for the field of grain-boundary engineering and its relatives. The inter-relationships within the set of rotations producing coincident site lattices in cubic crystals are examined in detail. Besides combining previously established but widely scattered results into a unified context, the present work details newly developed representations of the group structure in terms of strings of generators (based on quaternionic number theory, and including uniqueness proofs and rules for algebraic manipulation) as well as an easily visualized topological network model. Important results that were previously obscure or not universally understood (e.g. the Sigma combination rule governing triple junctions) are clarified in these frameworks. The methods also facilitate several general observations, including the very different natures of twin-limited structures in two and three dimensions, the inadequacy of the Sigma combination rule to determine valid quadruple nodes, and a curious link between allowable grain-boundary assignments and the four-color map theorem. This kind of understanding is essential to the generation of realistic statistical models of grain-boundary networks (particularly in twin-dominated systems) and is especially applicable to the field of grain-boundary engineering. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM reed12@llnl.gov RI Reed, Bryan/C-6442-2013; OI Rudd, Robert/0000-0002-6632-2681 NR 33 TC 23 Z9 23 U1 1 U2 10 PU INT UNION CRYSTALLOGRAPHY PI CHESTER PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND SN 2053-2733 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD MAY PY 2004 VL 60 BP 263 EP 277 DI 10.1107/S010876730400772X PN 3 PG 15 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 814KX UT WOS:000220974700011 PM 15103171 ER PT J AU Smith, N Mayhew, M Holden, MJ Kelly, H Robinson, H Heroux, A Vilker, VL Gallagher, DT AF Smith, N Mayhew, M Holden, MJ Kelly, H Robinson, H Heroux, A Vilker, VL Gallagher, DT TI Structure of C73G putidaredoxin from Pseudomonas putida SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID ELECTRON-TRANSFER; REDUCED PUTIDAREDOXIN; 2FE-2S FERREDOXIN; 5-MONOOXYGENASE; DYNAMICS; PROGRAM; COMPLEX; P450CAM; SYSTEM AB The structure of the C73G mutant of putidaredoxin (Pdx), the Fe2S2 ferredoxin that supplies electrons to cytochrome CYP101 (P450cam) for camphor oxidation, is reported at 1.9 Angstrom resolution in a C2 crystal form. The structure was solved by single-wavelength iron anomalous diffraction, which yielded electron density above the 2sigma level for over 97% of the non-H atoms in the protein. The final structure with R = 0.19 and R-free = 0.21 has been deposited in the Protein Data Bank with accession code 1r7s. The C2 crystal contains three Pdx molecules in the asymmetric unit, giving three independent models of the protein that are very similar (r.m.s.d. < 0.3 &ANGS; for the 106 C-α atoms). The unusually high solvent fraction of 80% results in comparatively few crystal-packing artifacts. The structure is briefly compared with the recently reported crystal structures of the C73S and C73S/C85S mutants. In general, the eight independent molecules in the three crystal structures (three in C73G, three in C73S and two in C73S/C85S) are much more similar to each other than to the previously reported NMR structure of wild-type Pdx in solution. The present findings show a unanimous structure in some regions crucial for electron-transfer interactions, including the cluster-binding loop 39-48 and the cytochrome-interaction region of Asp38 and Trp106. In addition, the Cys45 amide group donates a hydrogen bond to cluster sulfur S1, with Ala46 adopting an La conformation, in all three molecules in the crystal. C1 Natl Inst Stand & Technol, Div Biotechnol, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Gallagher, DT (reprint author), Natl Inst Stand & Technol, Div Biotechnol, Gaithersburg, MD 20899 USA. EM travis.gallagher@nist.gov NR 23 TC 7 Z9 8 U1 0 U2 3 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2004 VL 60 BP 816 EP 822 DI 10.1107/S0907444904003348 PN 5 PG 7 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 814BU UT WOS:000220951000003 PM 15103126 ER PT J AU Jang, SB Baeyens, K Jeong, MS SantaLucia, J Turner, D Holbrook, SR AF Jang, SB Baeyens, K Jeong, MS SantaLucia, J Turner, D Holbrook, SR TI Structures of two RNA octamers containing tandem G center dot A base pairs SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID RELAXATION MATRIX APPROACH; 5S RIBOSOMAL-RNA; CRYSTAL-STRUCTURE; HAMMERHEAD RIBOZYME; 2-DIMENSIONAL NMR; METAL-ION; RECOGNITION; MISMATCHES; MOTIFS; DOMAIN AB The crystal structures of two RNA octamers, 5'-GGC-(GA)GCC-3' and 5'-GIC(GA)GCC-3', have been determined from X-ray diffraction data to 2.8 and 2.7 Angstrom resolution, respectively. The RNA octamers crystallize in isomorphous unit cells containing two mispairs arranged in a self-complementary manner and one single strand in the asymmetric unit. The single strand pairs with another single strand related by crystallographic symmetry to form a third unique double helix. Tandem non-Watson-Crick G.A/A.G base pairs of the sheared type comprise an internal loop in the middle of each duplex. The NMR structure of this octameric RNA sequence is also known, allowing comparison of the variation between the six crystallographic duplexes and the solution structure. In the symmetric duplex of the octamer containing inosine, the sheared G.A pairs incorporate a bound water molecule. This duplex also binds one water molecule per strand in the minor groove adjacent to the G.A pairs. C1 Pusan Natl Univ, Korea Nanobiotechnol Ctr, Pusan 609735, South Korea. Katholieke Univ Leuven, Lab Analyt Chem & Med Physicochem, B-3000 Louvain, Belgium. Wayne State Univ, Dept Chem, Detroit, MI 48202 USA. Univ Rochester, Dept Chem, Rochester, NY 14627 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Biol Struct, Phys Biosci Div, Berkeley, CA 94720 USA. RP Jang, SB (reprint author), Pusan Natl Univ, Korea Nanobiotechnol Ctr, Pusan 609735, South Korea. EM sbjang@pusan.ac.kr FU NIGMS NIH HHS [GM 4921501] NR 33 TC 16 Z9 16 U1 0 U2 1 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2004 VL 60 BP 829 EP 835 DI 10.1107/S0907444904003804 PN 5 PG 7 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 814BU UT WOS:000220951000005 PM 15103128 ER PT J AU Teplitsky, A Mechaly, A Stojanoff, V Sainz, G Golan, G Feinberg, H Gilboa, R Reiland, V Zolotnitsky, G Shallom, D Thompson, A Shoham, Y Shoham, G AF Teplitsky, A Mechaly, A Stojanoff, V Sainz, G Golan, G Feinberg, H Gilboa, R Reiland, V Zolotnitsky, G Shallom, D Thompson, A Shoham, Y Shoham, G TI Structure determination of the extracellular xylanase from Geobacillus stearothermophilus by selenomethionyl MAD phasing SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID 1.8 ANGSTROM RESOLUTION; X-RAY-ANALYSIS; FREE R-VALUE; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI; THERMOSTABLE XYLANASE; GLYCOSYL HYDROLASES; PSEUDOMONAS-FLUORESCENS; MICROBIAL XYLANASES; CATALYTIC DOMAIN AB Xylanases are hemicellulases that hydrolyze the internal beta-1,4-glycoside bonds of xylan. The extracellular thermostable endo-1,4-beta-xylanase (EC 3.2.1.8; XT6) produced by the thermophilic bacterium Geobacillus stearothermophilus T-6 was shown to bleach pulp optimally at pH 9 and 338 K and was I successfully used in a large-scale biobleaching mill trial. The xylanase gene was cloned and sequenced. The mature enzyme consists of 379 amino acids, with a calculated molecular weight of 43 808 Da and a pI of 9.0. Crystallographic studies of XT6 were performed in order to study the mechanism of catalysis and to provide a structural basis for the rational introduction of enhanced thermostability by site-specific mutagenesis. XT6 was crystallized in the primitive trigonal space group P3(2)21, with unit-cell parameters a = b = 112.9, c = 122.7 Angstrom. A full diffraction data set for wild-type XT6 has been measured to 2.4 Angstrom resolution on flash-frozen crystals using synchrotron radiation. A fully exchanged selenomethionyl XT6 derivative (containing eight Se atoms per XT6 molecule) was also prepared and crystallized in an isomorphous crystal form, providing full selenium MAD data at three wavelengths and enabling phase solution and structure determination. The structure of wild-type XT6 was refined at 2.4 A resolution to a final R factor of 15.6% and an R-free of 18.6%. The structure demonstrates that XT6 is made up of an eightfold TIM-barrel containing a deep active-site groove, consistent with its 'endo' mode of action. The two essential catalytic carboxylic residues (Glul59 and Glu265) are located at the active site within 5.5 Angstrom of each other, as expected for 'retaining' glycoside hydrolases. A unique subdomain was identified in the carboxy-terminal part of the enzyme and was suggested to have a role in xylan binding. The three-dimensional structure of XT6 is of great interest since it provides a favourable starting point for the rational improvement of its already high thermal and pH stabilities, which are required for a number of biotechnological and industrial applications. C1 European Synchrotron Radiat Facil, F-38043 Grenoble, France. Hebrew Univ Jerusalem, Dept Inorgan Chem, IL-91904 Jerusalem, Israel. Hebrew Univ Jerusalem, Lab Struct Chem & Biol, IL-91904 Jerusalem, Israel. Technion Israel Inst Technol, Dept Food Engn & Biotechnol, IL-32000 Haifa, Israel. Technion Israel Inst Technol, Inst Catalysis Sci & Technol, IL-32000 Haifa, Israel. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. European Mol Biol Lab, Grenoble Outstn, F-38044 Grenoble, France. RP Stojanoff, V (reprint author), European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France. EM stojanof@bnl.gov; yshoham@tx.technion.ac.il; gil2@vms.huji.ac.il RI stojanoff, vivian /I-7290-2012 OI stojanoff, vivian /0000-0002-6650-512X NR 75 TC 37 Z9 38 U1 0 U2 3 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2004 VL 60 BP 836 EP 848 DI 10.1107/S0907444904004123 PN 5 PG 13 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 814BU UT WOS:000220951000006 PM 15103129 ER PT J AU Kantardjieff, KA Kim, CY Naranjo, C Waldo, GS Lekin, T Segelke, BW Zemla, A Park, MS Terwilliger, TC Rupp, B AF Kantardjieff, KA Kim, CY Naranjo, C Waldo, GS Lekin, T Segelke, BW Zemla, A Park, MS Terwilliger, TC Rupp, B TI Mycobacterium tuberculosis RmlC epimerase (Rv3465): a promising drug-target structure in the rhamnose pathway SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID ELECTRON-DENSITY; GENOMICS CONSORTIUM; SQUALENE SYNTHETASE; PROTEIN STRUCTURES; CRYSTAL-STRUCTURE; DTDP-RHAMNOSE; INHIBITORS; PREDICTION; REFINEMENT; CONVERSION AB The Mycobacterium tuberculosis rmlC gene encodes dTDP-4-keto-6-deoxyglucose epimerase, the third enzyme in the M. tuberculosis dTDP-L-rhamnose pathway which is essential for mycobacterial cell-wall synthesis. Because it is structurally unique, highly substrate-specific and does not require a cofactor, RmlC is considered to be the most promising drug target in the pathway, and the M. tuberculosis rmlC gene was selected in the initial round of TB Structural Genomics Consortium targets for structure determination. The 1.7 Angstrom native structure determined by the consortium facilities is reported and implications for in silico screening of ligands for structure-guided drug design are discussed. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94551 USA. Calif State Univ Fullerton, WM Keck Fdn Ctr Mol Struct, Fullerton, CA 92834 USA. Calif State Univ Fullerton, Dept Chem & Biochem, Fullerton, CA 92834 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Rupp, B (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, L-448, Livermore, CA 94551 USA. EM br@llnl.gov RI Terwilliger, Thomas/K-4109-2012 OI Terwilliger, Thomas/0000-0001-6384-0320 FU NIGMS NIH HHS [P50 GM62410] NR 41 TC 21 Z9 23 U1 1 U2 3 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2004 VL 60 BP 895 EP 902 DI 10.1107/S0907444904005323 PN 5 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 814BU UT WOS:000220951000012 PM 15103135 ER PT J AU Shin, DH Choi, IG Busso, D Jancarik, J Yokota, H Kim, R Kim, SH AF Shin, DH Choi, IG Busso, D Jancarik, J Yokota, H Kim, R Kim, SH TI Structure of OsmC from Escherichia coli: a salt-shock-induced protein SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID STATIONARY-PHASE; CRYSTAL-STRUCTURE; GENE-EXPRESSION; STRESS; OHR; CRYSTALLOGRAPHY; IDENTIFICATION; TRANSCRIPTION; THIOREDOXIN; RESOLUTION AB The crystal structure of an osmotically inducible protein (OsmC) from Escherichia coli has been determined at 2.4 Angstrom resolution. OsmC is a representative protein of the OsmC sequence family, which is composed of three sequence subfamilies. The structure of OsmC provides a view of a salt-shock-induced protein. Two identical monomers form a cylindrically shaped dimer in which six helices are located on the inside and two six-stranded beta-sheets wrap around these helices. Structural comparison suggests that the OsmC sequence family has a peroxiredoxin function and has a unique structure compared with other peroxiredoxin families. A detailed analysis of structures and sequence comparisons in the OsmC sequence family revealed that each subfamily has unique motifs. In addition, the molecular function of the OsmC sequence family is discussed based on structural comparisons among the subfamily members. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Kim, SH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. EM shkim@cchem.berkeley.edu RI Choi, In-Geol/F-3152-2013 FU NIGMS NIH HHS [GM62412] NR 35 TC 17 Z9 20 U1 0 U2 4 PU BLACKWELL MUNKSGAARD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2004 VL 60 BP 903 EP 911 DI 10.1107/S0907444904005013 PN 5 PG 9 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 814BU UT WOS:000220951000013 PM 15103136 ER PT J AU Praszalowicz, M AF Praszalowicz, M TI SU(3) breaking in decays of exotic baryons SO ACTA PHYSICA POLONICA B LA English DT Article ID QUARK-SOLITON MODEL; SKYRME MODEL; LARGE-N; CHIRAL SOLITONS; SIGMA-TERM; PI-N; QUANTIZATION; SCATTERING; DECUPLET; LIMIT AB Within the chiral soliton model the SU(3) breaking collective Hamiltonian introduces representation mixing in the baryonic wave functions. We calculate O(m(s)) effects of this mixing on the decay widths of decuplet and antidecuplet baryons. We find importance of the 27-plet admixture in the Theta(+) and Xi-(10) decays. The role of the 1/N-c nonleading terms in O(m(s)) transition matrix elements is discussed. C1 Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY USA. Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland. RP Praszalowicz, M (reprint author), Brookhaven Natl Lab, Nucl Theory Grp, Upton, NY USA. EM michal@quark.phy.bnl.gov RI Praszalowicz, Michal/F-1912-2016 NR 43 TC 35 Z9 35 U1 0 U2 0 PU ACTA PHYSICA POLONICA B, JAGELLONIAN UNIV, INST PHYSICS PI KRAKOW PA REYMONTA 4, 30-059 KRAKOW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD MAY PY 2004 VL 35 IS 5 BP 1625 EP 1641 PG 17 WC Physics, Multidisciplinary SC Physics GA 822LF UT WOS:000221540800005 ER PT J AU Bustamante, F Enick, RM Cugini, AV Killmeyer, RP Howard, BH Rothenberger, KS Ciocco, MV Morreale, BD AF Bustamante, F Enick, RM Cugini, AV Killmeyer, RP Howard, BH Rothenberger, KS Ciocco, MV Morreale, BD TI High-temperature kinetics of the homogeneous reverse water-gas shift reaction SO AICHE JOURNAL LA English DT Article DE water-gas shift; kinetics; homogeneous; high-temperature; Inconel ID PRESSURE-DEPENDENCE; HYDROGEN; SIMULATION; HO AB The high-temperature rate of reaction of the homogeneous, reverse water-gas shift reaction (rWGSR) has been evaluated in quartz reactors with rapid feed preheating under both low-and high-pressure conditions. The form of the power-law rate expression was consistent with the Bradford mechanism. The Arrhenius expressions for the reaction rate constant, corresponding to the empty reactor, were in very good agreement with the low-pressure results of Graven and Long, but yielded rate constants roughly four times greater than those obtained in our packed reactor and those reported by Kochubei and Moin and by Tingey. Reactor geometry was not responsible for these differences because computational fluid dynamics simulations revealed similar residence time distributions and comparable conversions when the same kinetic expression was used to model the rWGSR in each reactor. Most likely, the empty NETL reactor and the Graven and Long reactor did not attain an invariant value of the concentration of the chain carrier (H) at low reaction times, which led to an overestimation of the rate constant. Conversions attained in an Inconel(R) 600 reactor operating at comparable conditions were approximately two orders of magnitude greater than those realized in the quartz reactor. This dramatic increase in conversion suggests that the Inconel(R) 600 surfaces, which were depleted of nickel during the reaction, catalyzed the rWGSR. (C) 2004 American Institute of Chemical Engineers AIChE J, 50: 1028-1041, 2004 C1 Univ Pittsburgh, Dept Chem & Petr Engn, Natl Energy Technol Lab, Pittsburgh, PA 15261 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Parsons Project Serv Inc, Natl Energy Technol Lab, Library, PA 15129 USA. Fluent Inc, Morgantown, WV 26505 USA. RP Bustamante, F (reprint author), Univ Pittsburgh, Dept Chem & Petr Engn, Natl Energy Technol Lab, Pittsburgh, PA 15261 USA. EM fbustamu@udea.edu.co NR 22 TC 69 Z9 72 U1 4 U2 44 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0001-1541 J9 AICHE J JI AICHE J. PD MAY PY 2004 VL 50 IS 5 BP 1028 EP 1041 DI 10.1002/aic.10099 PG 14 WC Engineering, Chemical SC Engineering GA 818DC UT WOS:000221224800011 ER PT J AU Hamre, KM Matthews, DB Rinchik, E Chesler, E Goldowitz, D Mittleman, G AF Hamre, KM Matthews, DB Rinchik, E Chesler, E Goldowitz, D Mittleman, G TI Behavioral responses to ethanol or cocaine, including locomotor activation and anxiolytic response, in ENU-mutagenized mice. SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Meeting Abstract CT 27th Annual Meeting of the Research-Society-on-Alcoholism CY JUN 26-30, 2004 CL Vancouver, CANADA SP Res Soc Alcoholism C1 Univ Tennessee, Ctr Hlth Sci, Memphis, TN 38163 USA. Univ Memphis, Memphis, TN 38152 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD MAY PY 2004 VL 28 IS 5 SU S BP 90A EP 90A PG 1 WC Substance Abuse SC Substance Abuse GA 822OK UT WOS:000221549300501 ER PT J AU Snoddy, J Kirov, S Zhang, B Galloway, L Jackson, B Alspaugh, B Tebbe, A Shanafield, H AF Snoddy, J Kirov, S Zhang, B Galloway, L Jackson, B Alspaugh, B Tebbe, A Shanafield, H TI Collaborative, integrative, and comparative bioinformatics systems for analysis of genotype-phenotype networks in the study of behavioral genetic SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Meeting Abstract CT 27th Annual Meeting of the Research-Society-on-Alcoholism CY JUN 26-30, 2004 CL Vancouver, CANADA SP Res Soc Alcoholism C1 Univ Tennessee, Knoxville, TN 37996 USA. Sci Applicat Int Corp, Mclean, VA 22102 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD MAY PY 2004 VL 28 IS 5 SU S BP 170A EP 170A PG 1 WC Substance Abuse SC Substance Abuse GA 822OK UT WOS:000221549300974 ER PT J AU Thanos, PK Taintor, NB Rivera, SN Umegaki, H Ikari, H Roth, G Ingram, DK Hitzemann, R Fowler, JS Gatley, SJ Wang, GJ Volkow, ND AF Thanos, PK Taintor, NB Rivera, SN Umegaki, H Ikari, H Roth, G Ingram, DK Hitzemann, R Fowler, JS Gatley, SJ Wang, GJ Volkow, ND TI DRD2 gene transfer into the nucleus accumbens core of the alcohol preferring and nonpreferring rats attenuates alcohol drinking SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Article DE alcoholism adenovirus addiction positron emission tomography (PET) gene therapy ID DOPAMINE D-2 RECEPTOR; POSITRON-EMISSION-TOMOGRAPHY; REWARD DEFICIENCY SYNDROME; FREELY MOVING RATS; P-RATS; EXTRACELLULAR DOPAMINE; REINFORCED BEHAVIOR; PREFRONTAL CORTEX; BRAIN DOPAMINE; D-AMPHETAMINE AB Background: Transient overexpression of the dopamine D2 receptor (DRD2) gene in the nucleus accumbens (NAc) using an adenoviral vector has been associated with a significant decrease in alcohol intake in Sprague Dawley rats. This overexpression of DRD2 reduced alcohol consumption in a two-bottle-choice paradigm and supported the view that high levels of DRD2 may be protective against alcohol abuse. Methods: Using a limited access (1 hr) two-bottle-choice (water versus 10% ethanol) drinking paradigm, we examined the effects of the DRD2 vector in alcohol intake in the genetically inbred alcohol-preferring (P) and -nonpreferring (NP) rats. In addition, micro-positron emission tomography imaging was used at the completion of the study to assess in vivo the chronic (7 weeks) effects of ethanol exposure on DRD2 levels between the two groups. Results: P rats that were treated with the DRD2 vector (in the NAc) significantly attenuated their alcohol preference (37% decrease) and intake (48% decrease), and these measures returned to pretreatment levels by day 20. A similar pattern of behavior (attenuation of ethanol drinking) was observed in NP rats. Analysis of the [C-11]raclopride micro-positron emission tomography data after chronic (7 weeks) exposure to ethanol revealed clear DRD2 binding differences between the 11 and NP rats. P rats showed 16% lower [C-11]raclopride specific binding in striatum than the NP rats. Conclusions: These findings further support our hypothesis that high levels of DRD2 are causally associated with a reduction in alcohol consumption and may serve as a protective factor against alcoholism. That this effect was seen in P rats, which are predisposed to alcohol intake, suggests that they are protective even in those who are genetically predisposed to high alcohol intake. It is noteworthy that increasing DRD2 significantly decreased alcohol intake but did not abolish it, suggesting that high DRD2 levels may specifically interfere with the administration of large quantities of alcohol. The significantly higher DRD2 concentration in NP than P rats after 7 weeks of ethanol therefore could account for low alcohol intake. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Nagoya Univ, Sch Med, Dept Geriatr, Aichi, Japan. NIA, Gerontol Res Ctr, NIH, Baltimore, MD 21224 USA. Oregon Hlth Sci Univ, Dept Behav Neurosci, Portland, OR 97201 USA. NIAAA, Lab Neuroimaging, Bethesda, MD USA. RP Thanos, PK (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. EM thanos@bnl.gov FU NIAAA NIH HHS [AA07611, AA 07574, AA 11034] NR 74 TC 68 Z9 68 U1 1 U2 3 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD MAY PY 2004 VL 28 IS 5 BP 720 EP 728 DI 10.1097/01.ALC.0000125270.30501.08 PG 9 WC Substance Abuse SC Substance Abuse GA 822OH UT WOS:000221549000006 PM 15166646 ER PT J AU Pozhar, LA de Almeida, VF Hu, MZ AF Pozhar, LA de Almeida, VF Hu, MZ TI Virtual processing of advanced nanomaterials SO AMERICAN CERAMIC SOCIETY BULLETIN LA English DT Article C1 Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Pozhar, LA (reprint author), Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996 USA. RI de Almeida, Valmor/P-5498-2016 OI de Almeida, Valmor/0000-0003-0899-695X NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43086-6136 USA SN 0002-7812 J9 AM CERAM SOC BULL JI Am. Ceram. Soc. Bull. PD MAY PY 2004 VL 83 IS 5 PG 3 WC Materials Science, Ceramics SC Materials Science GA 835QM UT WOS:000222500600045 ER PT J AU Norman, EB Larimer, RM Rech, G Lee, J Vue, C Leubane, T Zamvil, K Guthrie, L AF Norman, EB Larimer, RM Rech, G Lee, J Vue, C Leubane, T Zamvil, K Guthrie, L TI Bringing atomic and nuclear physics laboratory data into the classroom SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB To illustrate a number of basic concepts in atomic and nuclear physics, we have developed three Web sites where students can analyze data from modern laboratories. By working through the on-line procedures, students will become acquainted with characteristic x-ray spectra, nuclear half-lives, x-ray fluorescence, and neutron activation analysis. (C) 2004 American Association of physics Teachers. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Irvine, Dept Comp Sci, Irvine, CA 92697 USA. Calif State Univ Fresno, Dept Phys, Fresno, CA 93740 USA. Franklin Middle Sch, Vallejo, CA 94590 USA. Hogan High Sch, Vallejo, CA 94591 USA. Acalanes High Sch, Lafayette, CA 94549 USA. RP Norman, EB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM ebnorman@lbl.gov NR 2 TC 1 Z9 1 U1 0 U2 1 PU AMER ASSOC PHYSICS TEACHERS AMER INST PHYSICS PI MELVILLE PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD MAY PY 2004 VL 72 IS 5 BP 652 EP 654 DI 10.1119/1.1643373 PG 3 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA 813YZ UT WOS:000220943700014 ER PT J AU Davis, KJ Dove, PM Wasylenki, LE De Yoreo, JJ AF Davis, KJ Dove, PM Wasylenki, LE De Yoreo, JJ TI Morphological consequences of differential Mg2+ incorporation at structurally distinct steps on calcite SO AMERICAN MINERALOGIST LA English DT Article ID CRYSTAL-GROWTH; SURFACE; PRECIPITATION; KINETICS AB Magnesium is considered the principal modifier of calcite morphology in many natural environments. However, the physical mechanism by which magnesium alters the external form of calcite has remained controversial due to a lack of direct experimental insight. Here we use in situ AFM observations of step dynamics and growth-hillock morphology to resolve the role of Mg2+ in governing calcite surface morphologies. We show that Mg2+ directly modifies the surface morphology of calcite as a consequence of differential interaction with four crystallographically controlled step directions. Step-specific interactions are especially evident at low Mg/Ca ratios in solution, where steps with acute step-edge geometries ([(4) over bar 41](-) and [48 (1) over bar](-)) are observed to be rough while obtuse steps ([(4) over bar 41](+) and [48 (1) over bar](+)) remain smooth. Higher Mg/Ca solution ratios cause the edges of both step-types to become rough and the growth spiral to approach an elliptical form. During this process, new [42 (1) over bar] step directions are generated by decreased growth velocities at the intersection of the +/- directions. As these steps flow along the [010] vector, they accumulate and result in the formation of pseudofacets with an orientation that approximates a (010) face. We propose that this phenomenon is the result of strain at the intersection of nonequivalent step-types, resulting in differential Mg2+ incorporation across the boundary between those steps. This hypothesis is supported by estimates of the incorporated strain as well as observations of growth-hillock recovery from impurity poisoning that indicate the presence of "remembered" strain at the boundary of the nonequivalent step-types. The results of this study offer a plausible molecular-scale explanation for elongate calcite crystals that are commonly observed in sedimentary environments. This novel explanation for habit modification of calcite by impurities arises from step-specific impurity interactions rather than the face-specific interactions commonly assumed in previous models (Folk 1974; Lahann 1978). C1 Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA. Lawrence Livermore Natl Lab, Dept Chem & Mat Sci, Livermore, CA 94550 USA. RP Davis, KJ (reprint author), Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA. EM dove@vt.edu RI Dove, Patricia/A-7911-2010 NR 32 TC 94 Z9 94 U1 8 U2 50 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1015 EIGHTEENTH ST, NW SUITE 601, WASHINGTON, DC 20036 USA SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAY-JUN PY 2004 VL 89 IS 5-6 BP 714 EP 720 PG 7 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA 824IM UT WOS:000221680000005 ER PT J AU Labotka, TC Cole, DR Riciputi, LR Fayek, M AF Labotka, TC Cole, DR Riciputi, LR Fayek, M TI Diffusion of C and O in calcite from 0.1 to 200 MPa SO AMERICAN MINERALOGIST LA English DT Article ID CARBON-DIOXIDE; SELF-DIFFUSION; ISOTOPIC EXCHANGE; OXYGEN DIFFUSION; TEMPERATURE; DEPENDENCE AB We measured the diffusivity of C and O in calcite over the pressure range 0.1-200 MPa at 600-800 degreesC in a pure CO2 atmosphere. The experiments were conducted on single, preannealed crystals of Chihuahuan calcite in an isotopically labeled atmosphere, and the diffusion profiles were measured by secondary ionization mass spectrometry (SIMS). At 800 degreesC, D-C and D-O are identical at 0.1 MPa at a value of similar to10(-13.5) cm(2)/s. The value of D-C decreases to similar to10(-16) cm(2)/s with an increase in pressure to similar to50 MPa and remains at that value to 200 MPa, but D-O remains nearly constant at a value of similar to10(-14) cm(2)/s to 200 MPa. The identical values at low pressure indicate that C and 0 are migrating together as a carbonate anion. A simple model relates the diffusivity of carbonate anions to the formation of vacancies at the crystal surface, which predicts that D-C proportional to 1/f(CO2). The prediction matches the observed decrease in D-C with increasing pressure to 50 MPa. The shapes of the diffusion profiles for the low-pressure experiments indicate compositional dependence of D, which also suggests the influence of CO2 sorption on the diffusivity. The value of D-C at 0.1 MPa can be fitted to the relation D-C = 0.62 exp[(-291 kJ/mol)/RT]. The activation energy is nearly twice the value determined for D-C at 100 MPa, similar to166 kJ/mol. The change in slope for log D-C vs. P and the change in E-a between 0.1 and 100 MPa suggest that the migrating C species changes from carbonate anions at low pressure to carbon atoms at P greater than or equal to 50 MPa. The values of D-O at 0.1 MPa can be fitted to D-O = 0.017 exp[(-261 kJ/mol)/RT], approximately the same as for C at 0.1 MPa and similar to the relation for D-O at 100 MPa: D-O = 0.008 exp[(-242 kJ/mol)/RT]. C1 Univ Tennessee, Dept Geol Sci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Labotka, TC (reprint author), Univ Tennessee, Dept Geol Sci, Knoxville, TN 37996 USA. EM tlabotka@utk.edu NR 21 TC 15 Z9 15 U1 0 U2 7 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1015 EIGHTEENTH ST, NW SUITE 601, WASHINGTON, DC 20036 USA SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAY-JUN PY 2004 VL 89 IS 5-6 BP 799 EP 806 PG 8 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA 824IM UT WOS:000221680000014 ER PT J AU Losinger, WC AF Losinger, WC TI A review of the GUM workbench SO AMERICAN STATISTICIAN LA English DT Software Review DE combined standard uncertainty; Guide to the Expression of Uncertainty in Measurement; uncertainty analysis; uncertainty budget AB The GUM Workbench provides an extremely useful tool for computing uncertainties that result from combining individual uncertainty components into a single total uncertainty, in accordance with requirements specified by the European Co-operation for Accreditation. The program is fairly easy to use and yields good results, including full uncertainty budgets. Certain tasks, such as identifying and dealing with outliers, and computing variance components due to random effects, need to be done outside of the GUM Workbench prior to entering data. A free demonstration version is available. C1 US DOE, New Brunswick Lab, Argonne, IL 60439 USA. RP Losinger, WC (reprint author), US DOE, New Brunswick Lab, 9800 S Cass Ave,Bldg 350, Argonne, IL 60439 USA. EM Willard.Losinger@ch.doe.gov NR 3 TC 10 Z9 10 U1 0 U2 1 PU AMER STATISTICAL ASSOC PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 USA SN 0003-1305 J9 AM STAT JI Am. Stat. PD MAY PY 2004 VL 58 IS 2 BP 165 EP 167 DI 10.1198/0003130043312 PG 3 WC Statistics & Probability SC Mathematics GA 816UU UT WOS:000221135600014 ER PT J AU Love, AH Hunt, JR Vogel, JS Knezovich, JP AF Love, AH Hunt, JR Vogel, JS Knezovich, JP TI Improving tritium exposure reconstructions using accelerator mass spectrometry SO ANALYTICAL AND BIOANALYTICAL CHEMISTRY LA English DT Article; Proceedings Paper CT International Conference on Isotopic and Nuclear Analytical Techniques for Heatlh and Envirnment CY JUN 10-13, 2003 CL Vienna, AUSTRIA SP Int Atom Engergy Acgy DE tree rings; tritiated; water vapor; groundwater ID TREE-RING ANALYSIS; NEVADA TEST-SITE; A-BOMB SURVIVORS; ENVIRONMENTAL TRITIUM; DOSE RECONSTRUCTION; D/H RATIOS; FALLOUT; WATER; CANCER; PINE AB Direct measurement of tritium atoms by accelerator mass spectrometry (AMS) enables rapid low-activity tritium measurements from milligram-sized samples and permits greater ease of sample collection, faster throughput, and increased spatial and/or temporal resolution. Because existing methodologies for quantifying tritium have some significant limitations, the development of tritium AMS has allowed improvements in reconstructing tritium exposure concentrations from environmental measurements and provides an important additional tool in assessing the temporal and spatial distribution of chronic exposure. Tritium exposure reconstructions using AMS were previously demonstrated for a tree growing on known levels of tritiated water and for trees exposed to atmospheric releases of tritiated water vapor. In these analyses, tritium levels were measured from milligram-sized samples with sample preparation times of a few days. Hundreds of samples were analyzed within a few months of sample collection and resulted in the reconstruction of spatial and temporal exposure from tritium releases. Although the current quantification limit of tritium AMS is not adequate to determine natural environmental variations in tritium concentrations, it is expected to be sufficient for studies assessing possible health effects from chronic environmental tritium exposure. C1 Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. RP Love, AH (reprint author), Lawrence Livermore Natl Lab, Div Environm Sci, L-396,POB 808, Livermore, CA 94551 USA. EM love5@llnl.gov FU NIEHS NIH HHS [P42 ES04705, P42 ES004705, P42 ES004705-180026] NR 65 TC 1 Z9 1 U1 2 U2 8 PU SPRINGER-VERLAG HEIDELBERG PI HEIDELBERG PA TIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANY SN 1618-2642 J9 ANAL BIOANAL CHEM JI Anal. Bioanal. Chem. PD MAY PY 2004 VL 379 IS 2 BP 198 EP 203 DI 10.1007/s00216-003-2425-9 PG 6 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 817QE UT WOS:000221191200005 PM 14735274 ER PT J AU Kellersberger, KA Yu, E Kruppa, GH Young, MM Fabris, D AF Kellersberger, KA Yu, E Kruppa, GH Young, MM Fabris, D TI Top-down characterization of nucleic acids modified by structural probes using high-resolution tandem mass spectrometry and automated data interpretation SO ANALYTICAL CHEMISTRY LA English DT Article ID CHEMICAL CROSS-LINKING; ELECTROSPRAY-IONIZATION; POSTTRANSCRIPTIONAL MODIFICATION; COLLISIONAL ACTIVATION; DNA-ADDUCTS; OLIGONUCLEOTIDES; SPECTRA; IDENTIFICATION; RNA; IONS AB A top-down approach based on sustained off-resonance irradiation collision-induced dissociation (SORI-CID) has been implemented on an electrospray ionization (ESI) Fourier transform mass spectrometer (FTMS) to characterize nucleic acid substrates modified by structural probes. Solvent accessibility reagents, such as dimethyl sulfate (DMS), 1-cyclohexyl-3-(2-morpholinoethyl)carbodiimide metho-p-toluenesulfonate (CMCT), and beta-edioxy-alpha-ketobutyraldehyde (kethoxal, KT) are widely employed to reveal the position of single- vs double-stranded regions and obtain the footprint of bound proteins onto nucleic acids structures. Established methods require end-labeling of the nucleic acid constructs, probe-specific chemistry to produce strand cleavage at the modified nucleotides, and analysis by polyacrylamide gel electrophoresis to determine the position of the susceptible sites. However, these labor-intensive procedures can be avoided when mass spectrometry is used to identify the probe-induced modifications from their characteristic mass signatures. In particular, ESI-FTMS can be directly employed to monitor the conditions of probe application to avoid excessive alkylation, which could induce unwanted distortion or defolding of the substrate of interest. The sequence position of the covalent modifications can be subsequently obtained from classic tandem techniques, which allow for the analysis of individual target adducts present in complex reaction mixtures with no need for separation techniques. Selection and activation by SORI-CID has been employed to reveal the position of adducts in nucleic acid substrates in excess of 6 kDa. The stability of the different covalent modifications under SORI-CID conditions was investigated. Multiple stages of isolation and activation were employed in MSn experiments to obtain the desired sequence information whenever the adduct stability was not particularly favorable, and SORI-CID induced the facile loss of the modified base. A new program called MS2Links was developed for the automated reduction and interpretation of fragmentation data obtained from modified nucleic acids. Based on an algorithm that searches for plausible isotopic patterns, the data reduction module is capable of discriminating legitimate signals from noise spikes of comparable intensity. The fragment identification module calculates the monoisotopic mass of ion products expected from a certain sequence and user-defined covalent modifications, which are finally matched with the signals selected by the data reduction program. Considering that MS2Links can generate similar fragment libraries for peptides and their covalent conjugates with other peptides or nucleic acids, this program provides an integrated platform for the structural investigation of protein-nucleic acid complexes based on cross-linking strategies and top-down ESI-FTMS. C1 Univ Maryland Baltimore Cty, Dept Chem & Biochem, Baltimore, MD 21250 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Fabris, D (reprint author), Univ Maryland Baltimore Cty, Dept Chem & Biochem, Baltimore, MD 21250 USA. EM fabiis@umbc.edu RI Yu, Eizadora/A-8971-2011 FU NIGMS NIH HHS [R01-GM643208] NR 49 TC 49 Z9 50 U1 0 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAY 1 PY 2004 VL 76 IS 9 BP 2438 EP 2445 DI 10.1021/ac0355045 PG 8 WC Chemistry, Analytical SC Chemistry GA 817VV UT WOS:000221205900011 PM 15117181 ER PT J AU Barnes, JH Schilling, GD Sperline, R Denton, MB Young, ET Barinaga, CJ Koppenaal, DW Hieftje, GM AF Barnes, JH Schilling, GD Sperline, R Denton, MB Young, ET Barinaga, CJ Koppenaal, DW Hieftje, GM TI Characterization of a focal plane camera fitted to a Mattauch-Herzog geometry mass spectrograph. 2. Use with an inductively coupled plasma SO ANALYTICAL CHEMISTRY LA English DT Article ID SPECTROMETRY; CAPABILITIES; INTERFACE; ELECTRODE AB A novel charge-sensitive detector array, termed the focal plane camera (FPC), has been coupled to a Mattauch-Herzog mass spectrograph (MHMS) with an inductively coupled plasma ionization source. The FPC employs an array of gold Faraday cups, each with its own charge-integrating circuit that allows the simultaneous detection of several m/z ratios. The ion-sampling interface of the MHMS has been redesigned to provide better heat transfer away from the sampler and skimmer cones and to reduce the negative effects of turbulent gas flows around the plasma. The instrument has produced limits of detection in the tens to hundreds of parts per quadrillion regime and isotope ratio accuracy and precision of 5% error and 0.007% RSD, respectively. Limits of detection with the FPC are comparable to those obtained with a single-channel secondary electron multiplier (SEM). However, the isotope ratio accuracy and precision are better with the FPC than when the SEM is employed. The dynamic range has been shown to be linear over 7 orders of magnitude. C1 Indiana Univ, Dept Chem, Bloomington, IN 47405 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Univ Arizona, Dept Chem, Tucson, AZ 85721 USA. RP Hieftje, GM (reprint author), Indiana Univ, Dept Chem, Bloomington, IN 47405 USA. EM hieftje@indiana.edu NR 23 TC 33 Z9 34 U1 2 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAY 1 PY 2004 VL 76 IS 9 BP 2531 EP 2536 DI 10.1021/ac030337u PG 6 WC Chemistry, Analytical SC Chemistry GA 817VV UT WOS:000221205900024 PM 15117194 ER PT J AU Song, JM Kasili, PM Griffin, GD Vo-Dinh, T AF Song, JM Kasili, PM Griffin, GD Vo-Dinh, T TI Detection of cytochrome c in a single cell using an optical nanobiosensor SO ANALYTICAL CHEMISTRY LA English DT Article ID PHOTODYNAMIC THERAPY; CARCINOMA-CELLS; APOPTOSIS; NANOSENSORS; IMMUNOASSAY; ANTIBODY; PATHWAY; TUMORS; CANCER; DEATH AB In this work, the intracellular measurement of cytochrome c using an optical nanobiosensor is demonstrated. The nanobiosensor is a unique fiberoptics-based tool which allows the minimally invasive analysis of intracellular components. Cytochrome c is a very important protein to the process which produces cellular energy. In addition, cytochrome c is well-known as the protein involved in apoptosis, or programmed cell death. delta-Aminolevulinic acid (5-ALA) was used to induce apoptosis in MCF-7 human breast carcinoma cells. 5-AIA, a photodynamic therapy (PDT) drug in cells was activated by a HeNe laser beam. After the PDT photoactivation, the release of cytochrome c from the mitochondria to the cytoplasm in a MCF-7 cell was monitored by the optical nanobiosensor inserted inside the single cell and followed by an enzyme-linked immunosorbent assay (ELISA) outside the cell. The combination of the nanobiosensor with the ELISA immunoassay improved the detection sensitivity of the nanobiosensor due to enzymatic amplification. Our results lead to the investigation of an apoptotic pathway at the single cell level. C1 Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, POB 2008, Oak Ridge, TN 37831 USA. EM vodinht@ornl.gov NR 30 TC 43 Z9 45 U1 1 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 EI 1520-6882 J9 ANAL CHEM JI Anal. Chem. PD MAY 1 PY 2004 VL 76 IS 9 BP 2591 EP 2594 DI 10.1021/ac0352878 PG 4 WC Chemistry, Analytical SC Chemistry GA 817VV UT WOS:000221205900032 PM 15117202 ER PT J AU Wong, V Shalliker, RA Guiochon, G AF Wong, V Shalliker, RA Guiochon, G TI Evaluation of the uniformity of analytical-size chromatography columns prepared by the downward packing of particulate slurries SO ANALYTICAL CHEMISTRY LA English DT Article ID LIQUID-CHROMATOGRAPHY; RETENTION DATA; BAND PROFILES; GAS CHROMATOGRAPHY; C-18 COLUMNS; EDDY DIFFUSION; REPRODUCIBILITY; REPEATABILITY; BEDS; CONSOLIDATION AB The axial heterogeneity of downward slurry-packed chromatography columns was evaluated. A series of columns were prepared that varied in total length from 5 to 30 cm. Each column was packed in stainless steel tubing that was sectioned to allow the column to be divided into 5-cm sections after packing. Each 5-cm section of these columns was then tested for chromatographic performance. In total, 22 such column sections were tested. The results of the study show that the consolidation of the packed bed is a very complex problem, yet systematic variations of the column performance were observed, depending on the location of the section tested from within the entire column. For example, when columns longer than 20 cm were packed, the most homogeneous and best performing section of the column was the lower midsection. Whereas for columns shorter than 20 cm in length, the best sectioned region of the bed was the lower and outlet region. In all cases, the most poorly packed region of the bed was the column inlet section, irrespective of the bed length. The phenomenon associated with this axial heterogeneity undoubtedly results from a complex interplay between wall friction, particle momentum, and the pressure pulsations resulting from the packing process. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Knoxville, TN 37996 USA. Univ Western Sydney, Sch Sci Food & Hort, Penrith, NSW 1797, Australia. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37996 USA. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM guiochon@utk.edu NR 22 TC 31 Z9 31 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAY 1 PY 2004 VL 76 IS 9 BP 2601 EP 2608 DI 10.1021/ac030391a PG 8 WC Chemistry, Analytical SC Chemistry GA 817VV UT WOS:000221205900034 PM 15117204 ER PT J AU Chandler, DP Jarrell, AE AF Chandler, DP Jarrell, AE TI Automated purification and suspension array detection of 16S rRNA from soil and sediment extracts by using tunable surface microparticles SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID BEAD-BASED METHOD; FLOW-CYTOMETRY; ENVIRONMENTAL-SAMPLES; DNA-SEQUENCES; PROBES; IDENTIFICATION; HYBRIDIZATION; QUANTITATION; MICROARRAYS; MICROCHIP AB Autonomous, field-deployable molecular detection systems require seamless integration of complex biochemical solutions and physical or mechanical processing steps. In an attempt to simplify the fluidic requirements for integrated biodetection systems, we used tunable surface microparticles both as an rRNA affinity purification resin in a renewable microcolumn sample preparation system and as the sensor surface in a flow cytometer detector. The tunable surface detection limits in both low- and high-salt buffers were 1 ng of total RNA (similar to10(4) cell equivalents) in 15-min test tube hybridizations and 10 ng of total RNA (similar to10(5) cell equivalents) in hybridizations with the automated system (30-s contact time). RNA fragmentation was essential for achieving tunable surface suspension array specificity. Chaperone probes reduced but did not completely eliminate cross-hybridization, even with probes sharing < 50% identity to target sequences. Nonpurified environmental extracts did not irreparably affect our ability to classify color-coded microparticles, but residual environmental constituents significantly quenched the Alexa-532 reporter fluor. Modulating surface charge did not influence the interaction of soluble environmental contaminants with conjugated beads. The automated system greatly reduced the effects of fluorescence quenching, especially in the soil background. The automated system was as efficacious as manual methods for simultaneous sample purification, hybridization, and washing prior to flow cytometry detection. The implications of unexpected target cross-hybridization and fluorescence quenching are discussed relative to the design and implementation of an integrated microbial monitoring system. C1 Argonne Natl Lab, Biochip Technol Ctr, Argonne, IL 60439 USA. Pacific NW Natl Lab, Environm Microbiol Grp, Richland, WA 99352 USA. RP Chandler, DP (reprint author), Argonne Natl Lab, Biochip Technol Ctr, 9700 S Cass Ave,Bldg 202,A-245, Argonne, IL 60439 USA. EM dchandler@anl.gov NR 30 TC 27 Z9 30 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD MAY PY 2004 VL 70 IS 5 BP 2621 EP 2631 DI 10.1128/AEM.70.5.2621-2631.2004 PG 11 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 819UD UT WOS:000221340400007 PM 15128511 ER PT J AU Zhu, YM Lee, YY Elander, RT AF Zhu, YM Lee, YY Elander, RT TI Dilute-acid pretreatment of corn stover using a high-solids percolation reactor SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE corn stover; dilute-acid hydrolysis; hemicellulose; percolation process; pretreatment; xylan ID HEMICELLULOSE HYDROLYSIS; SULFURIC-ACID AB Pretreatment of corn stover by dilute sulfuric acid was investigated using a laboratory percolation (flowthrough) reactor operated under high-solids conditions. The effects of reaction conditions and operating parameters on the performance of the percolation reactor were investigated seeking the optimal range in which acceptable levels of yield and sugar concentration could be attained. It was demonstrated that 70-75% recovery of xylose and 6 to 7% (w/w) xylose concentration were attainable. The high sugar concentration was obtained as a result of dense packing of dry corn stover and the low liquid throughput. Xylose was mostly unreacted, rather than decomposed. The cellulose and the unreacted xylan of treated corn stover were both effectively hydrolyzed by a "cellulase" enzyme preparation that also exhibits some activity on xylan. The xylose yield was affected significantly by the flow rate under the same reaction time and conditions. This behavior appears to be related to sugar decomposition, mass transfer resistance, and the fact that acid is neutralized by the buffering components of the biomass. C1 Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA. Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA. RP Lee, YY (reprint author), Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA. EM yylee@eng.auburn.edu NR 12 TC 34 Z9 39 U1 0 U2 4 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD MAY PY 2004 VL 117 IS 2 BP 103 EP 114 DI 10.1385/ABAB:117:2:103 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA 823OI UT WOS:000221622100004 PM 15159554 ER PT J AU Hull, LC Grossman, C Fjeld, RA Coates, JT Elzerman, AW AF Hull, LC Grossman, C Fjeld, RA Coates, JT Elzerman, AW TI Hybrid empirical-theoretical approach to modeling uranium adsorption SO APPLIED GEOCHEMISTRY LA English DT Article ID MINERAL ASSEMBLAGES; SUBSURFACE MEDIA; U(VI); MONTMORILLONITE; TRANSPORT; ACTINIDES; BINDING; URANYL; SOILS; SITE AB An estimated 330 metric tons of U are buried in the radioactive waste Subsurface Disposal Area (SDA) at the Idaho National Engineering and Environmental Laboratory (INEEL). An assessment of U transport parameters is being performed to decrease the uncertainty in risk and dose predictions derived from computer simulations of U fate and transport to the underlying Snake River Plain Aquifer. Uranium adsorption isotherms were measured for 14 sediment samples collected from sedimentary interbeds underlying the SDA. The adsorption data were fit with a Freundlich isotherm. The Freundlich n parameter is statistically identical for all 14 sediment samples and the Freundlich K-f parameter is correlated to sediment surface area (r(2) = 0.80). These findings suggest an efficient approach to material characterization and implementation of a spatially variable reactive transport model that requires only the measurement of sediment surface area. To expand the potential applicability of the measured isotherms, a model is derived from the empirical observations by incorporating concepts from surface complexation theory to account for the effects of solution chemistry. The resulting model is then used to predict the range of adsorption conditions to be expected in the vadose zone at the SDA based on the range in measured pore water chemistry. Adsorption in the deep vadose zone is predicted to be stronger than in near-surface sediments because the total dissolved carbonate decreases with depth. (C) 2003 Elsevier Ltd. All rights reserved. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. Clemson Univ, Dept Environm Engn & Sci, Clemson, SC 29634 USA. RP Hull, LC (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA. EM hulllc@inel.gov NR 43 TC 10 Z9 10 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0883-2927 J9 APPL GEOCHEM JI Appl. Geochem. PD MAY PY 2004 VL 19 IS 5 BP 721 EP 736 DI 10.1016/j.apgeochem.2003.10.001 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 815DP UT WOS:000221023300007 ER PT J AU Scaffidi, J Pearman, W Carter, JC Colston, BW Angel, SM AF Scaffidi, J Pearman, W Carter, JC Colston, BW Angel, SM TI Effects of sample temperature in femtosecond single-pulse laser-induced breakdown spectroscopy SO APPLIED OPTICS LA English DT Article ID INDUCED PLASMA SPECTROSCOPY; IN-SITU ANALYSIS; QUANTITATIVE-ANALYSIS; LIBS PLASMA; ABLATION; SPECTROMETRY; EMISSION; ALUMINUM; STEEL; EXCITATION AB As much as tenfold atomic emission enhancements have been observed in experiments combining nanosecond (ns) and femtosecond (fs) laser pulses in an orthogonal dual-pulse configuration for laser-induced breakdown spectroscopy (ns-fs orthogonal dual-pulse LIBS). In the examination of one of several potential sources of these atomic emission enhancements (sample heating by a ns air spark), minor reductions in atomic emission and as much as 15-fold improvements in mass removal have been observed for fs single-pulse LIBS of heated brass and aluminum samples. These results suggest that, although material removal with a high-powered, ultrashort fs pulse is temperature dependent, sample heating by the ns air spark is not the source of the atomic emission enhancements observed in ns-fs orthogonal dual-pulse LIBS. (C) 2004 Optical Society of America. C1 Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA. US Mil Acad, Dept Chem, West Point, NY 10996 USA. Lawrence Livermore Natl Lab, Med Technol Program, Livermore, CA 94550 USA. RP Angel, SM (reprint author), Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA. EM angel@mail.chem.sc.edu OI Angel, Stanley/0000-0002-0328-0568 NR 42 TC 15 Z9 15 U1 2 U2 11 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD MAY 1 PY 2004 VL 43 IS 13 BP 2786 EP 2791 DI 10.1364/AO.43.002786 PG 6 WC Optics SC Optics GA 816EL UT WOS:000221093100021 PM 15130020 ER PT J AU Spataru, CD Ismail-Beigi, S Benedict, LX Louie, SG AF Spataru, CD Ismail-Beigi, S Benedict, LX Louie, SG TI Quasiparticle energies, excitonic effects and optical absorption spectra of small-diameter single-walled carbon nanotubes SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID SEMICONDUCTORS; PSEUDOPOTENTIALS; INSULATORS AB We present a first-principles study of the effects of many-electron interactions on the optical properties of single-walled carbon nanotubes. Motivated by recent experiments, we have carried out ab initio calculations on the single-walled carbon nanotubes (3, 3), (5, 0) and (8, 0). The calculations are based on a many-body Green's function approach in which both the quasiparticle (single-particle) excitation spectrum and the optical (electron-hole excitation) spectrum are determined. We show that the optical spectrum of both the semiconducting and metallic nanotubes studied exhibits important excitonic effects due to their quasi-one-dimensional nature. Binding energies for excitonic states range from zero for the metallic (5, 0) tube to nearly 1 eV for the semiconducting (8, 0) tube. Moreover, the metallic (3, 3) tube possesses exciton states bound by nearly 100 meV. Our calculated spectra explain quantitatively the observed features found in the measured spectra. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Div H, Livermore, CA 94550 USA. RP Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM sglouie@uclink.berkeley.edu RI Ismail-Beigi, Sohrab/F-2382-2014 OI Ismail-Beigi, Sohrab/0000-0002-7331-9624 NR 27 TC 110 Z9 111 U1 2 U2 18 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0947-8396 EI 1432-0630 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD MAY PY 2004 VL 78 IS 8 BP 1129 EP 1136 DI 10.1007/s00339-003-2464-2 PG 8 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 802VZ UT WOS:000220192300007 ER PT J AU Doorn, SK Heller, DA Barone, PW Usrey, ML Strano, MS AF Doorn, SK Heller, DA Barone, PW Usrey, ML Strano, MS TI Resonant Raman excitation profiles of individually dispersed single walled carbon nanotubes in solution SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID DENSITY-OF-STATES; CHIRALITY DEPENDENCE; HIPCO PROCESS; SCATTERING; SPECTROSCOPY; SPECTRA AB Raman excitation profiles were generated between 695 and 985 nm for individual carbon nanotubes dispersed in aqueous solution. We confirmed that previously published spectral assignments for semi-conducting and metallic carbon nanotubes are able to predict the location and resonant maxima of radial breathing mode features in the Raman spectrum. Three large diameter features were observed within the excitation space over the scan range and accurately predicted as metallic species. There was significant agreement between predicted and observed Raman modes. However, one discrepancy is noted with the (6,4) nanotubes. This species is not observed when excited at or near its absorption transition. We find that the Raman cross-sections in general, assuming a diameter-based distribution of nanotubes, are disproportionately smaller for mod(n-m,3)=1 semi-conducting nanotubes than their counterparts by at least an order of magnitude. These results have important implications for the use of Raman spectroscopy to effectively characterize the chirality distribution of carbon nanotube samples. C1 Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. Univ Illinois, Dept Chem, Urbana, IL 61801 USA. RP Strano, MS (reprint author), Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA. EM strano@uiuc.edu RI Heller, Daniel/A-4283-2008; Zhou, Charlie/N-5376-2015 OI Heller, Daniel/0000-0002-6866-0000; NR 35 TC 114 Z9 114 U1 0 U2 20 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD MAY PY 2004 VL 78 IS 8 BP 1147 EP 1155 DI 10.1007/s00339-003-2466-0 PG 9 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 802VZ UT WOS:000220192300009 ER PT J AU Jung, GY Ganapathiappan, S Li, X Ohlberg, DAA Olynick, DL Chen, Y Tong, WM Williams, RS AF Jung, GY Ganapathiappan, S Li, X Ohlberg, DAA Olynick, DL Chen, Y Tong, WM Williams, RS TI Fabrication of molecular-electronic circuits by nanoimprint lithography at low temperatures and pressures SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID IMPRINT LITHOGRAPHY; BEAM LITHOGRAPHY AB We have utilized a modified version of thermal nanoimprint lithography to fabricate a rewritable, nonvolatile, molecular memory device with a density of 6.4 Gbit/cm(2). It has the advantages of a relatively low operating temperature of (similar to70degreesC) and pressure of (<500 psi or 4.5 MPa), both of which are critical to preserving the integrity of the molecular layer. The architecture of the circuit was based on an 8x8 crossbar structure, with an active molecular layer sandwiched between the top and bottom electrodes. A liftoff process was utilized to produce the top and bottom electrodes made of Pt/Ti bilayers. The active molecular layer was deposited by the Languir-Blodgett technique. We utilized a new class of nanoimprint resist formulated by dissolving a polymer in its monomer. The formulation we used, was poly(benzyl methacrylate), dissolved in benzyl methacrylate with t-butyl peroxy 2-ethylhexanoate added as a self-initiator (8:90:2 by weight). The new resist allowed us to achieve Pt/Ti lines of 40 nm in width and 130 nm in pitch. C1 Hewlett Packard Labs, Palo Alto, CA 94304 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hewlett Packard Corp, Inkjet Technol Platform, Technol Dev Operat, Corvallis, OR 97330 USA. RP Williams, RS (reprint author), Hewlett Packard Labs, 1501 Page Mill Rd, Palo Alto, CA 94304 USA. EM stan.williams@hp.com RI Tong, William/D-2564-2010; Williams, R. Stanley/A-8281-2009 OI Williams, R. Stanley/0000-0003-0213-4259 NR 9 TC 69 Z9 70 U1 2 U2 10 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD MAY PY 2004 VL 78 IS 8 BP 1169 EP 1173 DI 10.1007/s00339-003-2393-0 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 802VZ UT WOS:000220192300011 ER PT J AU Anderson, SG Barty, CPJ Betts, SM Brown, WJ Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Hartemann, FV Kuba, J LeSage, GP Rosenzweig, JB Slaughter, DR Springer, PT Tremaine, AM AF Anderson, SG Barty, CPJ Betts, SM Brown, WJ Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Hartemann, FV Kuba, J LeSage, GP Rosenzweig, JB Slaughter, DR Springer, PT Tremaine, AM TI Short-pulse, high-brightness X-ray production with the PLEIADES Thomson-scattering source SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article; Proceedings Paper CT Applications of High Field and Short Wavelength Sources X Conference CY OCT 12-15, 2003 CL Biarritz, FRANCE AB PLEIADES is a compact, tunable, high-brightness, ultra-short-pulse, Thomson-scattering X-ray source. Picosecond pulses of hard X-rays (10-200 keV) are created by colliding an ultra-relativistic (20-100 MeV), picosecond-duration electron beam with a high-intensity, sub-picosecond, 800-nm laser pulse. Initial operation of this source has produced 78-keV X-rays with 10(6) photons per pulse using a 57-MeV, 0.3-nC, 50-mum rms width electron beam and a 180-mJ, 15-mum rms width laser pulse. The angular distribution, energy, and energy spectrum of the source are found to agree well with theory and simulations. Source optimization is expected to increase X-ray output to between 10(7) and 10(8) photons per pulse with a peak brightness approaching 10(20) photons/s/0.1% bandwidth/mm(2)/mrad(2). C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. UCD Dept Appl Sci, Livermore, CA 94550 USA. Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RP Anderson, SG (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM anderson131@llnl.gov NR 11 TC 28 Z9 32 U1 0 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAY PY 2004 VL 78 IS 7-8 BP 891 EP 894 DI 10.1007/s00340-004-1455-0 PG 4 WC Optics; Physics, Applied SC Optics; Physics GA 817QY UT WOS:000221193200021 ER PT J AU Staub, F Braud, M Balmer, JE Nilsen, J Bajt, S AF Staub, F Braud, M Balmer, JE Nilsen, J Bajt, S TI Simultaneous imaging of the near- and far-field intensity distributions of the Ni-like Sn X-ray laser SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article; Proceedings Paper CT Applications of High Field and Short Wavelength Sources X Conference CY OCT 12-15, 2003 CL Biarritz, FRANCE ID SATURATION; NM AB We report two-dimensional near-field imaging experiments of the 11.9-nm Sn X-ray laser that were performed with a set of novel Mo/Y multilayer mirrors having reflectivities of up to similar to40% at normal and at 45degrees incidence. Second-moment analysis of the X-ray laser emission was used to determine values of the X-ray beam propagation factor M-2 for a range of irradiation parameters. The results reveal a reduction of M-2 with increasing prepulse intensity. The spatial size of the output is a factor of similar to2 smaller than previously measured for the 14.7-nm Pd X-ray laser, while the distance of the X-ray emission with respect to the target surface remains roughly the same . C1 Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Staub, F (reprint author), Univ Bern, Inst Appl Phys, Sidlerstr 5, CH-3012 Bern, Switzerland. EM felix.staub@iap.unibe.ch RI Bajt, Sasa/G-2228-2010 NR 14 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAY PY 2004 VL 78 IS 7-8 BP 971 EP 974 DI 10.1007/s00340-004-1431-8 PG 4 WC Optics; Physics, Applied SC Optics; Physics GA 817QY UT WOS:000221193200037 ER PT J AU Zeitoun, P Balcou, P Bucourt, S Delmotte, F Dovillaire, G Douillet, D Dunn, J Faivre, G Fajardo, M Goldberg, KA Hubert, S Hunter, JR Idir, M Jacquemot, S Kazamias, S Le Pape, S Levecq, X Lewis, CLS Marmoret, R Mercere, P Morlens, AS Naulleau, PP Ravet, MF Remond, C Rocca, JJ Smith, RF Troussel, P Valentin, C Vanbostal, L AF Zeitoun, P Balcou, P Bucourt, S Delmotte, F Dovillaire, G Douillet, D Dunn, J Faivre, G Fajardo, M Goldberg, KA Hubert, S Hunter, JR Idir, M Jacquemot, S Kazamias, S Le Pape, S Levecq, X Lewis, CLS Marmoret, R Mercere, P Morlens, AS Naulleau, PP Ravet, MF Remond, C Rocca, JJ Smith, RF Troussel, P Valentin, C Vanbostal, L TI Recent developments in X-UV optics and X-UV diagnostics SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article; Proceedings Paper CT Applications of High Field and Short Wavelength Sources X Conference CY OCT 12-15, 2003 CL Biarritz, FRANCE ID RAY LASER INTERFEROMETRY; BEAM; GENERATION AB Metrology of XUV beams (X-ray lasers, high-harmonic generation and VUV free-electron lasers) is of crucial importance for the development of applications. We have thus developed several new optical systems enabling us to measure the optical properties of XUV beams. By use of a Michelson interferometer working as a Fourier-transform spectrometer, the line shapes of different X-ray lasers have been measured with a very high accuracy (Deltalambda/lambdasimilar to10(-6)). Achievement of the first XUV wavefront sensor has enabled us to measure the beam quality of laser-pumped as well as discharge-pumped X-ray lasers. A capillary discharge X-ray laser has demonstrated a very good wavefront allowing us to achieve an intensity as high as 3x10(14) W cm(-2) by focusing with a f=5 cm mirror. The sensor accuracy has been measured using a calibrated spherical wave generated by diffraction. The accuracy has been estimated to be as good as lambda/120 at 13 nm. Commercial developments are underway. At Laboratoire d'Optique Appliquee, we are setting up a new beamline based on high-harmonic generation in order to start the femtosecond, coherent XUV optic . C1 Univ Paris 11, Lab Interact Rayonnement Avec Mat X, F-91405 Orsay, France. ENSTA, Lab Opt Appl, F-91761 Palaiseau, France. Imagine Opt, F-91400 Orsay, France. Ctr Sci, CNRS,UMR 8501, Inst Opt, Lab Charles Fabbry, F-91403 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. CEA, F-91680 Bruyeres Le Chatel, France. Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland. Colorado State Univ, NSF ERC Extreme Ultraviolet Sci & Technol, Ft Collins, CO 80523 USA. Colorado State Univ, Dept Elect & Comp Engn, Ft Collins, CO 80523 USA. RP Zeitoun, P (reprint author), Univ Paris 11, Lab Interact Rayonnement Avec Mat X, Bat 350, F-91405 Orsay, France. EM phillippe.zeitoun@ensta.fr RI Fajardo, Marta/A-4608-2012 OI Fajardo, Marta/0000-0003-2133-2365 NR 16 TC 8 Z9 8 U1 1 U2 7 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAY PY 2004 VL 78 IS 7-8 BP 983 EP 988 DI 10.1007/s00340-004-1430-9 PG 6 WC Optics; Physics, Applied SC Optics; Physics GA 817QY UT WOS:000221193200040 ER PT J AU Glover, TE Ackerman, GD Lee, RW Young, DA AF Glover, TE Ackerman, GD Lee, RW Young, DA TI Probing particle synthesis during femtosecond laser ablation: initial phase transition kinetics SO APPLIED PHYSICS B-LASERS AND OPTICS LA English DT Article; Proceedings Paper CT Applications of High Field and Short Wavelength Sources X Conference CY OCT 12-15, 2003 CL Biarritz, FRANCE ID SPECTROSCOPY; SILICON; SEMICONDUCTORS; RELAXATION; ENERGIES; MODEL AB The impulsive superheating of matter by an intense, ultrashort laser pulse drives material expansion into vacuum (ablation) and an associated formation of nanoparticles. The underlying dynamics of particle formation are complex and direct experimental probes of the rapid material evolution are essential. Femtosecond lasers coupled to modern synchrotrons offer an important new opportunity to probe ejecta dynamics on an atomic lengthscale. Here, the impulsive heating of a semiconductor (silicon) by an intense femtosecond laser pulse leads to material ejection and time-resolved photoemission spectroscopy probes rapid solidification kinetics occurring within the ejecta. Transient photoemission peak-shifts indicate that material is ejected predominantly as liquid droplets and that solidification occurs rapidly (<50 ps). The solidification time suggests that vacuum ejection leads to significantly enhanced undercooling compared to what has been obtained by more conventional quenching techniques; this may be of interest in attempts to 'trap' novel material states associated with extreme laser heating. Finally, a low fraction of vapor particles in the ejecta supports a view that the size-distribution of ejected particles is set by an initial fragmentation process rather than by vapor condensation. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source Div, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA. RP Glover, TE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source Div, Berkeley, CA 94720 USA. EM teglover@lbl.gov NR 25 TC 20 Z9 20 U1 0 U2 1 PU SPRINGER-VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 USA SN 0946-2171 J9 APPL PHYS B-LASERS O JI Appl. Phys. B-Lasers Opt. PD MAY PY 2004 VL 78 IS 7-8 BP 995 EP 1000 DI 10.1007/s00340-004-1449-y PG 6 WC Optics; Physics, Applied SC Optics; Physics GA 817QY UT WOS:000221193200042 ER PT J AU Norman, EB Browne, E Goldman, ID Renne, PR AF Norman, EB Browne, E Goldman, ID Renne, PR TI Improved limit on the electron capture decay branch of Lu-176 SO APPLIED RADIATION AND ISOTOPES LA English DT Article DE natural radioactivity; geochronology; electron-capture; Ge detector ID HALF-LIFE AB We have performed searches for the electron-capture decay branches of Lu-176 to the ground state and first excited state of Yb-176. No evidence of either decay mode was observed. From these measurements we have established upper limits on both of these possible branches that are each > 20 times more stringent than the single previously published limit. (C) 2003 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Sao Paulo, Inst Fis, BR-05508900 Sao Paulo, Brazil. Berkeley Geochronol Ctr, Berkeley, CA 94709 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. RP Norman, EB (reprint author), Lawrence Berkeley Natl Lab, Div Nucl Sci, 50R5008, Berkeley, CA 94720 USA. EM ebnorman@lbl.gov NR 17 TC 5 Z9 5 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD MAY PY 2004 VL 60 IS 5 BP 767 EP 770 DI 10.1016/j.apradiso.2003.12.001 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 806LL UT WOS:000220435300021 PM 15082057 ER PT J AU Silver, GL AF Silver, GL TI Corrigendum to "Work and disproportionation for aqueous plutonium" (vol 59, pg 217, 2003) SO APPLIED RADIATION AND ISOTOPES LA English DT Correction C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Silver, GL (reprint author), Los Alamos Natl Lab, POB 1663,MSE 500, Los Alamos, NM 87545 USA. EM gsilver@lanl.gov NR 1 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD MAY PY 2004 VL 60 IS 5 BP 783 EP 783 DI 10.1016/j.apradiso.2003.12.002 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 806LL UT WOS:000220435300024 ER PT J AU Moore, DS McGrane, SD Funk, DJ AF Moore, DS McGrane, SD Funk, DJ TI Infrared complex refractive index measurements and simulated reflection mode infrared absorption spectroscopy of shock-compressed polymer thin films SO APPLIED SPECTROSCOPY LA English DT Article DE infrared complex refractive index; reflection mode; infrared absorption spectroscopy; shock compression; polymer thin films; interference effects ID SPECTRA; SAMPLES; LAYER AB Thin film interference effects complicate the interpretation of reflection-mode infrared absorption spectra obtained in shock-compressed thin film materials and must be carefully accounted for in any analysis attempting to unravel shock-induced energy transfer or reactivity. We have calculated such effects for spectrally simple model systems and also, to the extent possible, for real systems such as polymethylmethacrylate (PMMA) and nitrocellulose (NC). We have utilized angle-dependent infrared (IR) reflectometry to obtain the ambient spectral complex index for PMMA and NC for use in the calculations and to interpret experiments. A number of counter-intuitive spectral effects are observed versus film thickness and during uniaxial shock compression: absorption band shifts, changes of shape, and changes in both absolute and relative peak intensities. The film thickness effects can be predicted by thin film interference alone, while additional assumptions are required to predict the effects due to shock compression. Since it is very difficult to obtain the complex index in the shock state, we made very simple assumptions regarding the change in vibrational spectra upon shock loading. We illustrate general thin film interference effects that could be expected and compare them to experimental results for the antisymmetric NO2 stretch mode of NC. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Moore, DS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM moored@lanl.gov RI Moore, David/C-8692-2013 NR 28 TC 10 Z9 10 U1 2 U2 10 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 201B BROADWAY ST, FREDERICK, MD 21701 USA SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAY PY 2004 VL 58 IS 5 BP 491 EP 498 DI 10.1366/000370204774103291 PG 8 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA 820UM UT WOS:000221415000002 PM 15176394 ER PT J AU Anovitz, LM Elam, JM Riciputi, LR Cole, DR AF Anovitz, LM Elam, JM Riciputi, LR Cole, DR TI Isothermal time-series determination of the rate of diffusion of water in Pachuca obsidian SO ARCHAEOMETRY LA English DT Review DE obsidian; diffusion; experiments; dating; SIMS; Chalco; Boltzmann-Matano; relaxation; polymer; concentration-dependence; time-dependence ID SODA-LIME GLASSES; FREE-VOLUME MODEL; SILICA GLASS; FICTIVE TEMPERATURE; STRUCTURAL RELAXATION; TAYLOR DISPERSION; MECHANICAL DEFORMATION; RAMAN CHARACTERIZATION; INFRARED-SPECTROSCOPY; POLYMERIC MEMBRANES AB Friedman and Smith's (1960) article introducing an exciting, potentially precise and inexpensive method of dating obsidian artefacts has thus far failed to reach its potential. Numerous efforts to refine, improve and even redevelop the method since that time have similarly failed to achieve the original promise. Only within the last eight years have significant improvements been made, due to both improved analytical techniques and a better understanding of the hydration process. However, most of our mechanistic understanding of the interaction of water with rhyolitic glass is based on experiments performed on melts and glasses at temperatures above their glass transitions, conditions inappropriate for investigation of near-surface environmental conditions. Unfortunately, studies detailing the temporal evolution of the diffusion profile at low temperatures are rare, and few useful data are available on the low-temperature diffusive hydration of silicate glasses. This paper presents data on the experimental hydration of obsidian from the Pachuca source (a.k.a. Sierra de las Navajas, Basin of Mexico) at 75degrees for times ranging from 3 to 562 days, and compares these results with data for samples obtained from a stratigraphic excavation of the Chalco site in the Basin of Mexico. Samples have been analysed using secondary ion mass spectrometry (SIMS) to provide concentration/depth data. While 75degreesC is still significantly above the temperatures at which archaeological obsidians hydrate, it is well below the glass transition temperature (approx. 400degreesC) and thus processes are likely to be similar to those that occur in nature, but fast enough to be observed over a laboratory timescale. The results demonstrate that a simple square-root-of-time model of the evolution of the diffusion profile is not adequate to describe the diffusion process, as measured diffusion profiles exhibit the effects of concentration- and time-dependent, non-Fickian diffusion. With progressive hydration, characteristic diffusion coefficients first decrease, then increase with time. Surface concentration increases with time, but an intermediate plateau is observed in its time evolution that is consistent with results obtained from the suite of Chalco samples. Both of these effects have been observed during diffusion in glassy polymer systems and are associated with the build-up and relaxation of self-stress caused by the influx of diffusing material. C1 Univ Tennessee, Dept Geosci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Anthropol, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Univ Tennessee, Dept Geosci, Knoxville, TN 37996 USA. RI Anovitz, Lawrence/P-3144-2016 OI Anovitz, Lawrence/0000-0002-2609-8750 NR 149 TC 30 Z9 30 U1 2 U2 18 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0003-813X EI 1475-4754 J9 ARCHAEOMETRY JI Archaeometry PD MAY PY 2004 VL 46 BP 301 EP 326 DI 10.1111/j.1475-4754.2004.00159.x PN 2 PG 26 WC Archaeology; Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Geosciences, Multidisciplinary SC Archaeology; Chemistry; Geology GA 828FG UT WOS:000221958600009 ER PT J AU Xia, XB Lin, CT Wang, G Fang, HQ AF Xia, XB Lin, CT Wang, G Fang, HQ TI Binding of phlorizin to the C-terminal loop 13 of the Na+/glucose cotransporter does not depend on the [560-608] disulfide bond SO ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS LA English DT Article DE conformational change; disulfide bond; phlorizin; stability; SGLT1; sulfhydryl-modification ID D-GLUCOSE TRANSPORTER; DISULFIDE BONDS; STABILITY; PROTEINS; TOPOLOGY AB The disulfide bonds of the Na+/glucose cotransporter (SGLT1) are believed to participate in the binding of the transport inhibitor phlorizin. Here, we investigated the role of the [560-608] disulfide bond on the phlorizin-binding function of the C-terminal loop 13 of SGLT1 using 3-iodoacetamidophlorizin (3-IAP) as a probe. The reactivity of 3-IAP to the fully reduced loop 13 was competitively inhibited by phlorizin. as evident from the MALDI mass spectra. It indicates that the disulfide bond is not mandatory for phlorizin binding. CD and equilibrium unfolding studies showed that the secondary structure and conformation stability of loop 13 were not affected by removing the disulfide bond. Furthermore, we generated a series of loop 13 mutants to assess the contribution of the disulfide bond to phlorizin binding. A positive correlation between the stability and phlorizin affinity of the mutant proteins was observed, implying that the protein stability, rather than the disulfide bond, is relevant to the phlorizin-binding function of loop 13. (C) 2004 Elsevier Inc. All rights reserved. C1 Beijing Inst Infect Dis, Beijing 10039, Peoples R China. Max Planck Inst Mol Physiol, D-44227 Dortmund, Germany. Pacific NW Natl Lab, Richland, WA 99352 USA. Beijing Inst Biotechnol, Beijing 100850, Peoples R China. RP Xia, XB (reprint author), Beijing Inst Infect Dis, Beijing 10039, Peoples R China. EM xb_xia2001@yahoo.com NR 25 TC 5 Z9 5 U1 0 U2 6 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0003-9861 J9 ARCH BIOCHEM BIOPHYS JI Arch. Biochem. Biophys. PD MAY 1 PY 2004 VL 425 IS 1 BP 58 EP 64 DI 10.1016/j.abb.2004.02.025 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 814VV UT WOS:000221003100007 PM 15081894 ER PT J AU Beckstead, JA Forte, TM Tuey, K Berkeley, L Krauss, RM Olivecrona, G Ryan, RO AF Beckstead, JA Forte, TM Tuey, K Berkeley, L Krauss, RM Olivecrona, G Ryan, RO TI Apolipoprotein A-V and triacylglycerol levels in plasma SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Meeting Abstract CT 5th Annual Conference on Arteriosclerosis, Thrombosis, and Vascular Biology CY MAY 06-08, 2004 CL San Francisco, CA C1 CHORI, Oakland, CA USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Umea Univ, Umea, Sweden. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscler. Thromb. Vasc. Biol. PD MAY PY 2004 VL 24 IS 5 MA P322 BP E56 EP E57 PG 2 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 818VN UT WOS:000221272700333 ER PT J AU Berger, S Bielicki, JK Gong, T Forte, TM AF Berger, S Bielicki, JK Gong, T Forte, TM TI Recombinant human paraoxonase 1 has platelet-activating factor acetylhydrolase-like activity: A possible anti-inflammatory role for paraoxonase 1 SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Meeting Abstract CT 5th Annual Conference on Arteriosclerosis, Thrombosis, and Vascular Biology CY MAY 06-08, 2004 CL San Francisco, CA C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscler. Thromb. Vasc. Biol. PD MAY PY 2004 VL 24 IS 5 MA P391 BP E69 EP E69 PG 1 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 818VN UT WOS:000221272700399 ER PT J AU Natarajan, P Forte, TM Chew, B Phillips, MC Oram, JF Bielicki, JK AF Natarajan, P Forte, TM Chew, B Phillips, MC Oram, JF Bielicki, JK TI Identification of an apolipoproteina-I structural element that stabilizes ABCA1 and mediates cellular cholesterol efflux SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Meeting Abstract CT 5th Annual Conference on Arteriosclerosis, Thrombosis, and Vascular Biology CY MAY 06-08, 2004 CL San Francisco, CA C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Penn, Sch Med, Philadelphia, PA 19104 USA. Univ Washington, Sch Med, Seattle, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscler. Thromb. Vasc. Biol. PD MAY PY 2004 VL 24 IS 5 MA P235 BP E41 EP E41 PG 1 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 818VN UT WOS:000221272700250 ER PT J AU Verreth, W Verhamme, P Pelat, M Ganame, J Bielicki, JK Mertens, A Quarck, R Benhabiles, N Marguerie, G Mackness, B Mackness, M Ninio, E Herregods, MC Balligand, JL Holvoet, P AF Verreth, W Verhamme, P Pelat, M Ganame, J Bielicki, JK Mertens, A Quarck, R Benhabiles, N Marguerie, G Mackness, B Mackness, M Ninio, E Herregods, MC Balligand, JL Holvoet, P TI Induction of PPARs in the adipose tissue is a key mechanism for the weight loss-induced increase of insulin sensitivity, correction of dyslipidemia, inhibition of atherosclerosis, and improvement of cardiovascular function in obese insulin-resistant mice SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Meeting Abstract CT 5th Annual Conference on Arteriosclerosis, Thrombosis, and Vascular Biology CY MAY 06-08, 2004 CL San Francisco, CA C1 Katholieke Univ Leuven, Ctr Expt Surg & Anesthesiol, Cardiovasc Res Unit, Louvain, Belgium. Catholic Univ Louvain, Dept Med, Unit Pharmacol & Therapeut, B-1200 Brussels, Belgium. Katholieke Univ Leuven, Dept Cardiol, Louvain, Belgium. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Clinigenetics, Nimes, France. Univ Manchester, Manchester Royal Infirm, Dept Med, Manchester M13 9WL, Lancs, England. Univ Paris 06, INSERM, U525, Inst Federat CMV, Paris, France. NR 0 TC 0 Z9 0 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1079-5642 EI 1524-4636 J9 ARTERIOSCL THROM VAS JI Arterioscler. Thromb. Vasc. Biol. PD MAY PY 2004 VL 24 IS 5 MA P254 BP E45 EP E45 PG 1 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 818VN UT WOS:000221272700269 ER PT J AU Holden, BP Stanford, SA Eisenhardt, P Dickinson, M AF Holden, BP Stanford, SA Eisenhardt, P Dickinson, M TI Evolution in the color-magnitude relation of early-type galaxies in clusters of galaxies at z similar or equal to 1 SO ASTRONOMICAL JOURNAL LA English DT Article DE galaxies : clusters : general; galaxies : elliptical and lenticular, cD; galaxies : evolution; galaxies : fundamental parameters; galaxies : photometry ID MEDIUM-SENSITIVITY SURVEY; ABSORPTION-LINE STRENGTHS; HIGH-REDSHIFT CLUSTERS; GROTH STRIP SURVEY; X-RAY DATA; LUMINOSITY FUNCTION; DISTANT CLUSTERS; ELLIPTIC GALAXIES; STELLAR POPULATIONS; E/S0 GALAXIES AB We present a study of the color evolution of elliptical and S0 galaxies in six clusters of galaxies inside the redshift range 0.78 < z < 1.27. For each cluster, we used imaging from the Hubble Space Telescope (HST) to determine morphological types of the galaxies. These types were determined both by an automated technique and from visual inspection. We performed simulations to determine the accuracy of the automated classifications and found a success rate of similar to75% at m(L-*) or brighter magnitudes for most of our HST imaging data with the fraction of late-type galaxies identified as early-type galaxies to be similar to 10% at m(L-*) to similar to 20% at m(L-* + 2). From ground-based optical and near-infrared imaging, we measured the zero point and scatter in the color-magnitude relation of the elliptical and S0 galaxy populations, which we combine with the 1998 sample of Stanford et al., yielding a sample of cluster early-type galaxies that span a look-back time of almost 9 Gyr from the present. We see the colors of the early-type cluster members become bluer with increasing redshift, as expected from passively evolving stellar populations. We fitted a set of models to the change in the color as a function of redshift, with the best-fitting values ranging from a formation redshift of 3(-1)(+2) to 5(-3), depending on the specific model used, though we find no dependence for the formation epoch on the metallicity of the populations. The large scatter in resulting formation epochs, which depends on the details of the models used, implies that the oldest stars in the elliptical galaxies appear to have formed at redshifts of z > 3. We find possible evolution in the scatter of the colors, with some high-redshift clusters showing scatter as small as the Coma Cluster but others showing much larger scatter. Those clusters with a small scatter imply either a formation redshift of at least z similar to 3 or a smaller spread in the range of formation redshifts at lower redshifts, assuming a Gaussian distribution of star formation around the mean epoch. C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. RP Holden, BP (reprint author), Univ Calif Santa Cruz, Lick Observ, Mt Hamilton, CA 95140 USA. EM holden@ucolick.org; adam@igpp.ucllnl.org; prme@kromos.jpl.nasa.gov; med@stsci.edu NR 74 TC 72 Z9 74 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAY PY 2004 VL 127 IS 5 BP 2484 EP 2510 DI 10.1086/382722 PG 27 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 823BP UT WOS:000221585000002 ER PT J AU Sheldon, ES Johnston, DE Frieman, JA Scranton, R McKay, TA Connolly, AJ Budavari, T Zehavi, I Bahcall, NA Brinkmann, J Fukugita, M AF Sheldon, ES Johnston, DE Frieman, JA Scranton, R McKay, TA Connolly, AJ Budavari, T Zehavi, I Bahcall, NA Brinkmann, J Fukugita, M TI The galaxy-mass correlation function measured from weak lensing in the Sloan Digital Sky Survey SO ASTRONOMICAL JOURNAL LA English DT Article DE cosmology : observations; dark matter; gravitational lensing; large-scale structure of universe ID SPECTROSCOPIC TARGET SELECTION; EARLY DATA RELEASE; HUBBLE DEEP FIELD; REDSHIFT SURVEY; INTRINSIC CORRELATION; COMMISSIONING DATA; CLUSTER; ALIGNMENTS; LUMINOSITY; SAMPLE AB We present galaxy-galaxy lensing measurements over scales 0.025 to 10 h(-1) Mpc in the Sloan Digital Sky Survey (SDSS). Using a flux-limited sample of 127,001 lens galaxies with spectroscopic redshifts and mean luminosity [L] similar to L-* and 9,020,388 source galaxies with photometric redshifts, we invert the lensing signal to obtain the galaxy-mass correlation function xi(gm). We find xi(gm) is consistent with a power law, xi(gm) (r = r(0))(-gamma), with best-fit parameters gamma = 1.79 +/- 0.06 and r(0) (5.4 +/- 0.7) (0.27/Omega(m))(1/gamma) h(-1) Mpc. At fixed separation, the ratio xi(gg)/xi(gm) = b/r, where b is the bias and r is the correlation coefficient. Comparing with the galaxy autocorrelation function for a similarly selected sample of SDSS galaxies, we find that b/r is approximately scale-independent over scales 0.2 - 6.7 h(-1) Mpc, with mean [b/r] = (1.3 +/- 0.2) (Omega(m)/0.27). We also find no scale dependence in b/r for a volume-limited sample of luminous galaxies (-23.0 < M-r < -21.5). The mean b/r for this sample is [b/r](Vlim) = (2.0 +/- 0.7) (Omega(m)/0.27). We split the lens galaxy sample into subsets based on luminosity, color, spectral type, and velocity dispersion and see clear trends of the lensing signal with each of these parameters. The amplitude and logarithmic slope of xi(gm) increase with galaxy luminosity. For high luminosities (L similar to 5 L-*), xi(gm) deviates significantly from a power law. These trends with luminosity also appear in the subsample of red galaxies, which are more strongly clustered than blue galaxies. C1 Univ Chicago, Ctr Cosmol Phys, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA. Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA. Eotvos Lorand Univ, Dept Phys Complex Syst, H-1518 Budapest, Hungary. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Apache Point Observ, Sunspot, NM 88349 USA. Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. RP Univ Chicago, Ctr Cosmol Phys, 5640 S Ellis Ave, Chicago, IL 60637 USA. RI McKay, Timothy/C-1501-2009; Brinkmann, Jonathan/H-2779-2014 OI McKay, Timothy/0000-0001-9036-6150; Brinkmann, Jonathan/0000-0001-6128-659X NR 75 TC 170 Z9 171 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-6256 EI 1538-3881 J9 ASTRON J JI Astron. J. PD MAY PY 2004 VL 127 IS 5 BP 2544 EP 2564 DI 10.1086/383293 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 823BP UT WOS:000221585000005 ER PT J AU de Vries, WH Becker, RH White, RL Helfand, DJ AF de Vries, WH Becker, RH White, RL Helfand, DJ TI Optical properties of faint first variable radio sources SO ASTRONOMICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : statistics; quasars : general ID DIGITAL SKY SURVEY; ACTIVE GALACTIC NUCLEI; REFRACTIVE INTERSTELLAR SCINTILLATION; SPECTRAL SLOPE VARIABILITY; PEARSON-READHEAD SURVEY; 1.4 GHZ; EXTRAGALACTIC SOURCES; INTRADAY VARIABILITY; MONITORING PROGRAM; CORRELATED RADIO AB A sample of 123 radio sources that exhibit significant variations at 1.4 GHz on a 7 year baseline has been created using FIRST VLA B-configuration data from 1995 and 2002 on a strip at delta = 0 near the south Galactic cap. This sample spans the range of radio flux densities from similar to2 to 1000 mJy. It presents both in size and radio flux density range a unique starting point for variability studies of galaxies and quasars harboring lower luminosity active galactic nuclei (AGNs). We find, by comparing our variable and nonvariable control samples with the Sloan Digital Sky Survey, the following: (1) The quasar fraction of both the variable and nonvariable samples declines as a function of declining radio flux density levels; ( 2) our variable sample contains a consistently higher fraction of quasars than the nonvariable control sample, irrespective of radio flux; ( 3) the variable sources are almost twice as likely to be retrieved from the optical SDSS data than the nonvariable ones; ( 4) based on relative numbers, we estimate that quasars are about 5 times more likely to harbor a variable radio source than are galaxies; and ( 5) there does not appear to be any significant optical color offset between the two samples, even though the suggestive trend for sources to be bluer when a variable has been detected before and may be real. This leads us to conclude that both radio variability and radio flux density levels, in combination with accurate optical information, are important discriminators in the study of ( radio) variability of galaxies. The latter start to dominate the source counts below similar to20 mJy. In any case, variability appears to be an intrinsic property of radio sources and is not limited to quasars. Radio variability at low flux density levels may offer a unique tool in AGN unification studies. C1 Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. RP de Vries, WH (reprint author), Univ Calif Davis, Dept Phys, 1 Shields Ave, Davis, CA 95616 USA. EM devries1@llnl.gov RI White, Richard/A-8143-2012 NR 40 TC 28 Z9 32 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAY PY 2004 VL 127 IS 5 BP 2565 EP 2578 DI 10.1086/383550 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 823BP UT WOS:000221585000006 ER PT J AU Raymond, SN Miknaitis, G Fraser, OJ Garg, A Hawley, SL Jedicke, R Quinn, T Rockosi, CM Stubbs, CW Anderson, SF Hogan, CJ Ivezic, E Lupton, RH West, AA Brewington, H Brinkmann, J Harvanek, M Kleinman, SJ Krzesinski, J Long, D Neilsen, EH Newman, PR Nitta, A Snedden, SA AF Raymond, SN Miknaitis, G Fraser, OJ Garg, A Hawley, SL Jedicke, R Quinn, T Rockosi, CM Stubbs, CW Anderson, SF Hogan, CJ Ivezic, E Lupton, RH West, AA Brewington, H Brinkmann, J Harvanek, M Kleinman, SJ Krzesinski, J Long, D Neilsen, EH Newman, PR Nitta, A Snedden, SA TI A strategy for finding near-Earth objects with the SDSS telescope SO ASTRONOMICAL JOURNAL LA English DT Article DE minor planets, asteroids; solar system : general; surveys ID DIGITAL SKY SURVEY; MAGNITUDES; ASTEROIDS AB We present a detailed observational strategy for finding near-Earth objects (NEOs) with the Sloan Digital Sky Survey (SDSS) telescope. We investigate strategies in normal, unbinned mode, as well as binning the CCDs 2x2 or 3x3, which affects the sky coverage rate and the limiting apparent magnitude. We present results from 1 month, 3 year, and 10 year simulations of such surveys. For each cadence and binning mode, we evaluate the possibility of achieving the Spaceguard goal of detecting 90% of 1 km NEOs (absolute magnitude Hless than or equal to18 for an albedo of 0.1). We find that an unbinned survey is most effective at detecting Hless than or equal to20 NEOs in our sample. However, a 3x3 binned survey reaches the Spaceguard goal after only 7 years of operation. As the proposed large survey telescopes (Pan-STARRS, LSST) are at least 5-10 years from operation, an SDSS NEO survey could make a significant contribution to the detection and photometric characterization of the NEO population. C1 Univ Washington, Dept Astron, Seattle, WA 98195 USA. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Apache Point Observ, Sunspot, NM 88349 USA. Cracow Pedag Univ, Mt Suhora Observ, PL-30084 Krakow, Poland. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Raymond, SN (reprint author), Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA. EM raymond@astro.washington.edu RI Stubbs, Christopher/C-2829-2012; West, Andrew/H-3717-2014 OI Stubbs, Christopher/0000-0003-0347-1724; NR 15 TC 5 Z9 5 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD MAY PY 2004 VL 127 IS 5 BP 2978 EP 2987 DI 10.1086/383210 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 823BP UT WOS:000221585000038 ER PT J AU Stompor, R White, M AF Stompor, R White, M TI The effects of low temporal frequency modes on minimum variance maps from PLANCK SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE methods : data analysis; cosmology : cosmic microwave background ID MICROWAVE BACKGROUND ANISOTROPY; MAKING ALGORITHM; SURVEYOR AB We estimate the effects of low temporal frequency modes in the time stream on sky maps such as expected from the PLANCK experiment-a satellite mission designed to image the sky in the microwave band. We perform the computations in a semi-analytic way based on a simple model of PLANCK observations, which permits an insight into the structure of noise correlations of PLANCK-like maps, without doing exact, computationally intensive numerical calculations. We show that, for a set of plausible scanning strategies, marginalization over temporal frequency modes with frequencies lower than the spin frequency of the satellite (similar or equal to1/60 Hz) causes a nearly negligible deterioration of a quality of the resulting sky maps. We point out that this observation implies that it should be possible to successfully remove effects of long-term time domain parasitic signals from the PLANCK maps during the data analysis stage. C1 Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RP Stompor, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. EM radek@cfpa.berkeley.edu RI White, Martin/I-3880-2015 OI White, Martin/0000-0001-9912-5070 NR 19 TC 10 Z9 10 U1 0 U2 0 PU E D P SCIENCES PI LES ULIS CEDEXA PA 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, BP 112, F-91944 LES ULIS CEDEXA, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2004 VL 419 IS 2 BP 783 EP 792 DI 10.1051/0004-6361:20034185 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 827GD UT WOS:000221886800041 ER PT J AU Abbasi, R Abu-Zayyad, T Amann, JF Archbold, G Bellido, JA Belov, K Belz, JW Bergman, DR Cao, Z Clay, RW Connolly, B Cooper, MD Dawson, BR Finley, C Hanlon, WF Hoffman, CM Holzscheiter, MH Huntemeyer, P Jui, CCH Kim, K Kirn, MA Loh, EC Manago, N Marek, LJ Martens, K Martin, G Matthews, JAJ Matthews, JN Painter, CA Perera, L Reil, K Riehle, R Roberts, M Sarracino, JS Sasaki, M Schnetzer, SR Simpson, KM Sinnis, C Smith, JD Sokolsky, P Song, C Springer, RW Stokes, BT Thomas, SB Thompson, TN Thomson, GB Tupa, D Westerhoff, S Wiencke, LR Zech, A Zhang, X AF Abbasi, R Abu-Zayyad, T Amann, JF Archbold, G Bellido, JA Belov, K Belz, JW Bergman, DR Cao, Z Clay, RW Connolly, B Cooper, MD Dawson, BR Finley, C Hanlon, WF Hoffman, CM Holzscheiter, MH Huntemeyer, P Jui, CCH Kim, K Kirn, MA Loh, EC Manago, N Marek, LJ Martens, K Martin, G Matthews, JAJ Matthews, JN Painter, CA Perera, L Reil, K Riehle, R Roberts, M Sarracino, JS Sasaki, M Schnetzer, SR Simpson, KM Sinnis, C Smith, JD Sokolsky, P Song, C Springer, RW Stokes, BT Thomas, SB Thompson, TN Thomson, GB Tupa, D Westerhoff, S Wiencke, LR Zech, A Zhang, X TI Search for global dipole enhancements in the HiRes-I monocular data above 10(18.5) eV SO ASTROPARTICLE PHYSICS LA English DT Article DE cosmic rays; anisotropy; galactic center; centaurus A; M87; dipole AB Several proposed source models for ultra-high energy cosmic rays (UHECRs) consist of dipole distributions oriented towards major astrophysical landmarks such as the galactic center, M87, or Centaurus A. We use a comparison between real data and simulated data to show that the HiRes-I monocular data for energies above 10(18.5) eV is, in fact, consistent with an isotropic source model. We then explore methods to quantify our sensitivity to dipole source models oriented towards the Galactic Center, M87, and Centaurus A. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. Univ Utah, High Energy Astrophys Inst, Salt Lake City, UT 84112 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia. Univ Montana, Dept Phys & Astron, Missoula, MT 59812 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Columbia Univ, Dept Phys, Irvington, NY 10533 USA. Columbia Univ, Nevis Lab, Irvington, NY 10533 USA. Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. RP Stokes, BT (reprint author), Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. EM stokes@cosmic.utah.edu RI Song, Chihwa/A-3455-2008; Martens, Kai/A-4323-2011; Belov, Konstantin/D-2520-2013 NR 15 TC 16 Z9 16 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-6505 J9 ASTROPART PHYS JI Astropart Phys. PD MAY PY 2004 VL 21 IS 2 BP 111 EP 123 DI 10.1016/j.astropartphys.2003.11.003 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 820US UT WOS:000221415600001 ER PT J AU Ogle, PM Mason, KO Page, MJ Salvi, NJ Cordova, FA McHardy, IM Priedhorsky, WC AF Ogle, PM Mason, KO Page, MJ Salvi, NJ Cordova, FA McHardy, IM Priedhorsky, WC TI Relativistic OVIII emission and ionized outflow in NGC 4051 measured with XMM-Newton SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : individual (NGC 4051); X-rays : galaxies ID SEYFERT 1 GALAXIES; ACTIVE GALACTIC NUCLEI; DUSTY WARM ABSORBER; REFLECTION GRATING SPECTROMETER; HOLE ACCRETION DISKS; NARROW-LINE REGION; X-RAY SPECTROSCOPY; BLACK-HOLE; ASCA OBSERVATIONS; SPECTRAL VARIABILITY AB We present XMM-Newton Reflection Grating Spectrometer observations of the soft X-ray spectrum of NGC 4051 and explore their implications for the inner accretion disk and ionized outflow in the active galactic nucleus. We fit the soft X-ray excess with a relativistically broadened O VIII recombination spectrum, including the entire line series and recombination continuum. This plus an underlying power-law continuum provides a much better fit to the soft X-ray spectrum than a single temperature or disk blackbody plus power law. The emission-line profiles, computed for a Kerr metric around a maximally rotating black hole, reveal a sharply peaked disk emissivity law and inner radius smaller than 1.7RG. The spectrum also includes narrow absorption and emission lines from C, N, O, Ne, and Fe in an ionized outflow. Outflow column densities are relatively low and do not create significant edges in the spectrum. The small amount of absorption bolsters confidence in the detection of relativistic emission-line features. The narrow- line emitter has a large (76%) global covering fraction, leading to strong forbidden lines and filling in of the resonance absorption lines. We also find broad C vi Lyalpha and very broad O VII emission from the broad-line region. The narrow-and broad-line regions span large ranges in ionization parameter and may arise in a disk outflow. The ionized absorber has a large ionization range, which is inconsistent with pressure equilibrium in a multiphase medium. The mass outflow rate exceeds the accretion rate by a factor of 1000. C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. UCL, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Southampton, Southampton, Hants, England. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ogle, PM (reprint author), CALTECH, Jet Prop Lab, MS 238-332,4800 Oak Grove Dr, Pasadena, CA 91109 USA. EM pmo@sgra.jpl.nasa.gov OI Priedhorsky, William/0000-0003-0295-9138 NR 70 TC 62 Z9 62 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2004 VL 606 IS 1 BP 151 EP 167 DI 10.1086/382744 PN 1 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 813SC UT WOS:000220925800013 ER PT J AU Mauche, CW Liedahl, DA Mathiesen, BF Jimenez-Garate, MA Raymond, JC AF Mauche, CW Liedahl, DA Mathiesen, BF Jimenez-Garate, MA Raymond, JC TI Reprocessing of soft X-ray emission lines in black hole accretion disks SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; black hole physics; galaxies : individual (MCG-6-30-15); galaxies : Seyfert; radiative transfer; X-rays : galaxies ID DUSTY WARM ABSORBER; MCG-6-30-15; CORONA; MARKARIAN-766; SPECTRUM; PROFILES; MODEL AB By means of a Monte Carlo code that accounts for Compton scattering and photoabsorption followed by recombination, we investigate the radiation transfer of Lyalpha, Healpha, and recombination continua photons of H- and He-like C, N, O, and Ne produced in the photoionized atmosphere of a relativistic black hole accretion disk. We find that photoelectric opacity causes significant attenuation of photons with energies above the O VIII K edge, that the conversion efficiencies of these photons into lower energy lines and recombination continua are high, and that accounting for this reprocessing significantly (by factors of 21%-105%) increases the flux of the Lyalpha and Healpha emission lines of H- and He-like C and O escaping the disk atmosphere. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. MIT, Ctr Space Res, Cambridge, MA 02139 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Mauche, CW (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM mauche@cygnus.llnl.gov; liedahl1@llnl.gov; mathiesen2@llnl.gov; mario@space.mit.edu; jraymond@cfa.harvard.edu NR 21 TC 8 Z9 8 U1 1 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2004 VL 606 IS 1 BP 168 EP 172 DI 10.1086/382938 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 813SC UT WOS:000220925800014 ER PT J AU Branch, D Thomas, RC Baron, E Kasen, D Hatano, K Nomoto, K Filippenko, AV Li, WD Rudy, RJ AF Branch, D Thomas, RC Baron, E Kasen, D Hatano, K Nomoto, K Filippenko, AV Li, WD Rudy, RJ TI Direct analysis of spectra of the peculiar type Ia supernova 2000cx SO ASTROPHYSICAL JOURNAL LA English DT Article DE supernovae : general; supernovae : individual (SN 2000cx) ID HIGH-VELOCITY EJECTA; INFRARED-SPECTRA; OPTICAL-SPECTRA; SN 1994D; GEOMETRY; 1991T; STAR AB The Type Ia supernova (SN) 2000cx exhibited multiple peculiarities, including a lopsided B-band light-curve peak that does not conform to current methods for using shapes of light curves to standardize SN Ia luminosities. We use the parameterized SN synthetic-spectrum code SYNOW to study line identifications in the photospheric-phase spectra of SN 2000cx. Previous work established the presence of Ca II infrared triplet features forming above velocity similar to20,000 km s(-1), much higher than the photospheric velocity of similar to10,000 km s(-1). We find Ti II features forming at the same high velocity. High-velocity line formation is partly responsible for the photometric peculiarities of SN 2000cx: for example, B-band flux blocking by Ti II absorption features that decreases with time causes the B light curve to rise more rapidly and decline more slowly than it otherwise would. SN 2000cx contains an absorption feature near 4530 Angstrom that may be Hbeta, forming at the same high velocity. The lack of conspicuous Halpha and Paalpha signatures does not necessarily invalidate the Hbeta identification if the high-velocity line formation is confined to a clump that partly covers the photosphere and the Halpha and Paalpha source functions are elevated relative to that of resonance scattering. The Hbeta identification is tentative. If it is correct, the high-velocity matter must have come from a nondegenerate companion star. C1 Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 113, Japan. Univ Tokyo, Res Ctr Early Universe, Bunkyo Ku, Tokyo 113, Japan. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Aerosp Corp, Space Sci Applicat Lab, Los Angeles, CA 90009 USA. RP Branch, D (reprint author), Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA. EM branch@nhn.ou.edu RI Baron, Edward/A-9041-2009; Nomoto, Ken'ichi/A-4393-2011 OI Baron, Edward/0000-0001-5393-1608; NR 32 TC 23 Z9 23 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2004 VL 606 IS 1 BP 413 EP 423 DI 10.1086/382950 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 813SC UT WOS:000220925800034 ER PT J AU Ryutova, M Shine, R AF Ryutova, M Shine, R TI Response of the corona to magnetic activity in underlying plage regions SO ASTROPHYSICAL JOURNAL LA English DT Article DE Sun : activity; Sun : corona; Sun : magnetic fields; Sun : photosphere; Sun : transition region; Sun : UV radiation ID TRANSITION REGION; PHOTOSPHERIC NETWORK; EXPLOSIVE EVENTS; SOUND-WAVES; FLUX TUBE; PROPAGATION; SUN AB We study the response of the solar corona to magnetic activity in the underlying plage regions using high-resolution Michelson Doppler Imager magnetograms co-aligned with multiwavelength images taken by TRACE at chromospheric and coronal temperatures. We show that the EUV emission above plage regions that are dominated by single-polarity magnetic elements always has an amorphous shape that topologically mimics the shape of the underlying plage. Spacetime slices of the amorphous emission in the coronal lines show coherent braidlike structures with almost constant period for a given area. Contrary to this, coronal emission above mixed-polarity plages is highly discrete and consists of sporadic localized radiative transients. As different regions of strongly inhomogeneous corona evolve in different ways, separate mechanisms for energy production, flow, and release are probably required. We argue that in all cases the primary energy source lies in continuous hydro-magnetic activity among the photospheric magnetic fields. The character of this activity determines the processes of the extraction of energy and its transport throughout the solar atmosphere. We propose a physical mechanism that may explain the diverse properties of the UV/EUV emission in upper layers of atmosphere and its relevance to the photospheric magnetic fields. C1 Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. Lockheed Martin Solar & Astrophys Lab, Palo Alto, CA 94304 USA. RP Ryutova, M (reprint author), Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, POB 808,L-413, Livermore, CA 94550 USA. EM ryutova1@llnl.gov; shine@lmsal.com NR 30 TC 8 Z9 8 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAY 1 PY 2004 VL 606 IS 1 BP 571 EP 582 DI 10.1086/382859 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 813SC UT WOS:000220925800049 ER PT J AU Singer, BC Revzan, KL Hotchi, T Hodgson, AT Brown, NJ AF Singer, BC Revzan, KL Hotchi, T Hodgson, AT Brown, NJ TI Sorption of organic gases in a furnished room SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE volatile organic compounds; adsorption; desorption; residential; indoor air quality; hazardous air pollutants; tobacco smoke tracers ID INDOOR MATERIALS; MATERIAL-SURFACES; SCREENING METHOD; AIR; CARPET; MODEL; VOCS; DIFFUSION; PARAMETER; BEHAVIOR AB We present experimental data and semi-empirical models describing the sorption of organic gases in a simulated indoor residential environment. Two replicate experiments were conducted with 20 volatile organic compounds (VOCs) in a 50-m(3) room finished with painted wallboard, carpet and cushion, draperies and furnishings. The VOCs span a wide volatility range and include ten hazardous air pollutants. VOCs were introduced to the static chamber as a pulse and their gas-phase concentrations were measured during a net adsorption period and a subsequent net desorption period. Three sorption models were fit to the measured concentrations for each compound to determine the simplest formulation needed to adequately describe the observed behavior. Sorption parameter values were determined by fitting the models to adsorption period data then checked by comparing measured and predicted behavior during desorption. The adequacy of each model was evaluated using a goodness of fit parameter calculated for each period. Results indicate that sorption usually does not greatly affect indoor concentrations of methyl-tert-butyl ether, 2-butanone, isoprene and benzene. In contrast, sorption appears to be a relevant indoor process for many of the VOCs studied, including C-8-C-10 aromatic hydrocarbons (HC), terpenes, and pyridine. These compounds sorbed at rates close to typical residential air change rates and exhibited substantial sorptive partitioning at equilibrium. Polycyclic aromatic HCs, aromatic alcohols, ethenylpyridine and nicotine initially adsorbed to surfaces at rates of 1.5 greater than or equal to 6 h(-1) and partitioned 95 greater than or equal to 99% in the sorbed phase at equilibrium. (C) 2004 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Indoor Environm Dept, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Dept Atmospher Sci, Berkeley, CA 94720 USA. RP Singer, BC (reprint author), Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Indoor Environm Dept, Berkeley, CA 94720 USA. EM bcsinger@lbl.gov NR 29 TC 71 Z9 74 U1 0 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD MAY PY 2004 VL 38 IS 16 BP 2483 EP 2494 DI 10.1016/j.atmosenv.2004.02.003 PG 12 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 818ST UT WOS:000221265500005 ER PT J AU Clack, HL Koshland, CP Lucas, D Sawyer, RF AF Clack, HL Koshland, CP Lucas, D Sawyer, RF TI Development of an air-blast atomizer for independent control of droplet size and spray density SO ATOMIZATION AND SPRAYS LA English DT Article ID AIRBLAST ATOMIZATION; LIQUID SHEETS; VAPORIZATION; COMBUSTION; INSTABILITY; PRESSURE; BEHAVIOR; DISINTEGRATION; COALESCENCE; EVAPORATION AB The atomizer described is a novel twin-fluid design that allows independent control of mean droplet size and mean spray density Designed to handle unpressurized fluids at low flow rates, the prefilming double-annular air-blast atomizer (PFDAAA) distributes fuel in a liquid film over a hollow, tapered cylindrical centerbody. Two independently controlled atomizing gas streams shear the inner and outer surfaces of the cylindrical fluid film at the injector tip, resulting in continuously variable atomization. Data taken during a series of cold-flow experiments include both mean droplet size and spray density measures. The data demonstrate that controlling the relative flow rates of the two atomizing gas streams produces droplet dispersions whose mean droplet size and spray density vary independently of each other. Measured values of Sauter mean diameter (SMD) for isopropyl alcohol sprays range from 250 to 3100 mum, and values of normalized interdroplet spacing range from 0.8 to 3.6 mean droplet diameters. When presented collectively, the mean droplet size and spray density data form a performance map indicating the operating range of the PFDAAA for the conditions tested. Parametrically variable sprays such as those generated by the PFDAAA constitute a previously unavailable experimental platform for spray combustion research. Investigations using laser diagnostics to probe a controlled variable spray could provide insights into the physicochemical processes within a spray that ultimately affect combustion efficiency and pollutant formation. C1 Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Sch Publ Hlth, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Clack, HL (reprint author), IIT, Dept Mech Mat & Aerosp Engn, 10 W 32nd St, Chicago, IL 60616 USA. RI Sawyer, Robert/B-5013-2014 NR 59 TC 4 Z9 4 U1 0 U2 10 PU BEGELL HOUSE INC PI NEW YORK PA 145 MADISON AVE, NEW YORK, NY 10016 USA SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PD MAY-JUN PY 2004 VL 14 IS 3 BP 265 EP 287 DI 10.1615/AtomizSpr.v14.i3.40 PG 23 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 825QS UT WOS:000221773700004 ER PT J AU Goh, SL Murthy, N Xu, MC Frechet, JMJ AF Goh, SL Murthy, N Xu, MC Frechet, JMJ TI Cross-linked microparticles as carriers for the delivery of plasmid DNA for vaccine development SO BIOCONJUGATE CHEMISTRY LA English DT Article ID TARGETED GENE DELIVERY; BACTERIAL CPG-DNA; INVERSE MICROEMULSION; DENDRITIC CELLS; IN-VITRO; MICROSPHERES; MOTIFS; POLYMERIZATION; MACROPHAGES; ACTIVATION AB Plasmid DNA was directly encapsulated into biocompatible polymer microparticles via radical polymerization in an inverse emulsion system. Acrylamide-based microspheres 0.2-1 mum in diameter were prepared using an acid-cleavable difunctional monomer. Retention of the DNA payload at physiological pH with complete release under acidic conditions at lysosomal pH was demonstrated. By trapping the plasmid DNA within the cross-linked microparticle, enzymatic degradation was prevented when exposed to serum nucleases. For vaccine development, these delivery vehicles were also investigated for their ability to generate immune responses when delivered to phagocytic cells of the immune system. Encapsulated plasmid DNA demonstrated immunostimulatory activity in macrophages, leading to cytokine secretion of IL-6 with a response similar to40-fold higher than that achieved with DNA alone. C1 Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA. EM frechet@cchem.berkeley.edu OI Frechet, Jean /0000-0001-6419-0163 FU NIBIB NIH HHS [R01 EB 002047] NR 53 TC 70 Z9 73 U1 2 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1043-1802 J9 BIOCONJUGATE CHEM JI Bioconjugate Chem. PD MAY-JUN PY 2004 VL 15 IS 3 BP 467 EP 474 DI 10.1021/bc034159n PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Multidisciplinary; Chemistry, Organic SC Biochemistry & Molecular Biology; Chemistry GA 822TN UT WOS:000221563300005 PM 15149173 ER PT J AU Hart, FX Easterly, CE AF Hart, FX Easterly, CE TI An analytical model for the calculation of the change in transmembrane potential produced by an ultrawideband electromagnetic pulse SO BIOELECTROMAGNETICS LA English DT Article DE dosimetry; Mie scattering; high peak power pulses; nonionizing radiation; electric field ID PLANE-WAVE; RATS; RADIATION; EXPOSURE; IRRADIATION; PROPAGATION; FIELDS AB The electric field pulse shape and change in transmembrane potential produced at various points within a sphere by an intense, ultrawideband pulse are calculated in a four stage, analytical procedure. Spheres of two sizes are used to represent the head of a human and the head of a rat. In the first stage, the pulse is decomposed into its Fourier components. In the second stage, Mie scattering analysis (MSA) is performed for a particular point in the sphere on each of the Fourier components, and the resulting electric field pulse shape is obtained for that point. In the third stage, the long wavelength approximation (LWA) is used to obtain the change in transmembrane potential in a cell at that point. In the final stage, an energy analysis is performed. These calculations are performed at 45 points within each sphere. Large electric fields and transmembrane potential changes on the order of a millivolt are produced within the brain, but on a time scale on the order of nanoseconds. The pulse shape within the brain differs considerably from that of the incident pulse. Comparison of the results for spheres of different sizes indicates that scaling of such pulses across species is complicated. Published 2004 Wiley-Liss, Inc. C1 Univ South, Dept Phys, Sewanee, TN 37383 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Div Life Sci, Oak Ridge, TN USA. RP Hart, FX (reprint author), Univ South, Dept Phys, Sewanee, TN 37383 USA. EM fhart@sewanee.edu NR 20 TC 1 Z9 1 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0197-8462 J9 BIOELECTROMAGNETICS JI Bioelectromagnetics PD MAY PY 2004 VL 25 IS 4 BP 251 EP 259 DI 10.1002/bem.10196 PG 9 WC Biology; Biophysics SC Life Sciences & Biomedicine - Other Topics; Biophysics GA 819VB UT WOS:000221342900005 PM 15114634 ER PT J AU Leenheer, JA Noyes, TI Rostad, CE Davisson, ML AF Leenheer, JA Noyes, TI Rostad, CE Davisson, ML TI Characterization and origin of polar dissolved organic matter from the Great Salt Lake SO BIOGEOCHEMISTRY LA English DT Article DE algae; bacteria; dissolved organic carbon; dissolved organic matter; salt water ID PACIFIC-OCEAN; C-14; CARBON; GROUNDWATER AB Polar dissolved organic matter (DOM) was isolated from a surface-water sample from the Great Salt Lake by separating it from colloidal organic matter by membrane dialysis, from less-polar DOM fractions by resin sorbents, and from inorganic salts by a combination of sodium cation exchange followed by precipitation of sodium salts by acetic acid during evaporative concentration. Polar DOM was the most abundant DOM fraction, accounting for 56% of the isolated DOM. Colloidal organic matter was C-14-age dated to be about 100% modern carbon and all of the DOM fractions were C-14-age dated to be between 94 and 95% modern carbon. Average structural models of each DOM fraction were derived that incorporated quantitative elemental and infrared, C-13-NMR, and electrospray/mass spectrometric data. The polar DOM model consisted of open-chain N-acetyl hydroxy carboxylic acids likely derived from N-acetyl heteropolysaccharides that constituted the colloidal organic matter. The less polar DOM fraction models consisted of aliphatic alicyclic ring structures substituted with carboxyl, hydroxyl, ether, ester, and methyl groups. These ring structures had characteristics similar to terpenoid precursors. All DOM fractions in the Great Salt Lake are derived from algae and bacteria that dominate DOM inputs in this lake. C1 US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA. Lawrence Livermore Natl Lab, Div Environm Sci, Livermore, CA 94550 USA. RP Leenheer, JA (reprint author), US Geol Survey, Denver Fed Ctr, POB 25046,MS 408,Bldg 95, Denver, CO 80225 USA. EM leenheer@usgs.gov NR 25 TC 30 Z9 33 U1 2 U2 27 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PD MAY PY 2004 VL 69 IS 1 BP 125 EP 141 DI 10.1023/B:BIOG.0000031044.16410.27 PG 17 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 827UX UT WOS:000221929800007 ER PT J AU Kneipp, J Miller, LM Spassov, S Sokolowski, F Lasch, P Beekes, M Naumann, D AF Kneipp, J Miller, LM Spassov, S Sokolowski, F Lasch, P Beekes, M Naumann, D TI Scrapie-infected cells, isolated prions, and recombinant prion protein: A comparative study SO BIOPOLYMERS LA English DT Article; Proceedings Paper CT 10th European Conference on the Spectroscopy of Biological Molecules (ECSBM 2003) CY AUG 30-SEP 04, 2003 CL Szeged, HUNGARY DE SHaPrP(90-232); scrapie 263K; prion; transmissible spongiform encephalopathies; Syrian hamster; FTIR; dorsal root ganglia ID TRANSMISSIBLE SPONGIFORM ENCEPHALOPATHIES; INFRARED MICROSPECTROSCOPY; BETA-SHEETS; TISSUE; PRP; SPECTROSCOPY; ABSORPTION; TRANSITION AB Fourier-transform infrared microscopic spectra of scrapie-infected nervous tissue measured at high spatial resolution (similar to6 mum) were compared with those obtained from the purified, pardly proteinase K digested scrapie isoform of the prion protein isolated from nervous tissue of hamsters infected with the same scrapie strain (263K) to elucidate similarities/dissimilarities between prion structure investigated in situ and ex vivo. A further comparison is drawn to the recombinant Syrian hamster prion protein SHaPrP(90-232) after in vitro conformational transition front the predominantly alpha-helical isoform to beta-sheet-rich structures. It is shown that prion protein structure can be investigated within tissue and that detectability of regions with elevated beta-sheet content as observed in microspectra of prion-infected tissue strongly depends on spatial resolution of the experiment. (C) 2004 Wiley Periodicals, Inc. C1 Robert Koch Inst, D-13353 Berlin, Germany. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Naumann, D (reprint author), Robert Koch Inst, Nordufer 20, D-13353 Berlin, Germany. EM naumannD@rki.de RI Spassov, Sashko/C-2105-2013; OI Spassov, Sashko/0000-0002-3585-3682; Beekes, Michael/0000-0002-6454-6657; Lasch, Peter/0000-0001-6193-3144 NR 22 TC 19 Z9 19 U1 0 U2 2 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0006-3525 J9 BIOPOLYMERS JI Biopolymers PD MAY-JUN PY 2004 VL 74 IS 1-2 BP 163 EP 167 DI 10.1002/bip.20064 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 817EK UT WOS:000221160600032 PM 15137116 ER PT J AU Gibbons, JW Andrews, KM AF Gibbons, JW Andrews, KM TI PIT tagging: Simple technology at its best SO BIOSCIENCE LA English DT Article DE animal; mark-recapture; microchip; PIT tag; tagging ID PASSIVE INTEGRATED TRANSPONDERS; SNAKES; TAGS; IDENTIFICATION; MOVEMENTS; SURVIVAL; MARKERS; ANIMALS; SYSTEM; LIVE AB Since their first use in the mid-1980s,passive integrated transponder devices (PIT tags) have allowed innovative investigations into numerous biological traits of animals. The tiny, coded markets injected into individual animals allow assessment of growth rates, movement patterns, and survivorship for many species in a manner more reliable than traditional approaches of externally marking animals for identification. PIT tags have also been used to confirm the identity of zoo animals, pets, and protected species that have been illegally removed from the wild. New approaches with PIT tags herald advances in physiology and conservation biology, as well as greater understanding of social interactions among individuals in a population. Despite their current limitations, including high purchase cost, low detection distance, and potential tag loss in some circumstances, PIT tags offer many opportunities to unravel animal mysteries that heretofore could not be addressed effectively. C1 Univ Georgia, Athens, GA 30602 USA. Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Gibbons, JW (reprint author), Univ Georgia, Athens, GA 30602 USA. EM gibbons@srel.edu; andrews@srel.edu NR 50 TC 167 Z9 187 U1 6 U2 70 PU AMER INST BIOLOGICAL SCI PI WASHINGTON PA 1444 EYE ST, NW, STE 200, WASHINGTON, DC 20005 USA SN 0006-3568 J9 BIOSCIENCE JI Bioscience PD MAY PY 2004 VL 54 IS 5 BP 447 EP 454 DI 10.1641/0006-3568(2004)054[0447:PTSTAI]2.0.CO;2 PG 8 WC Biology SC Life Sciences & Biomedicine - Other Topics GA 820TJ UT WOS:000221411900013 ER PT J AU Kadam, KL Rydholm, EC McMillan, JD AF Kadam, KL Rydholm, EC McMillan, JD TI Development and validation of a kinetic model for enzymatic saccharification of lignocellulosic biomass SO BIOTECHNOLOGY PROGRESS LA English DT Article ID TRICHODERMA-VIRIDE; CELLULASE COMPONENTS; CELLULOSIC BIOMASS; MATHEMATICAL-MODEL; FUEL ETHANOL; HYDROLYSIS; WOOD; BIOCONVERSION; ACID; FERMENTATION AB A multireaction kinetic model was developed for closed-system enzymatic hydrolysis of lignocellulosic biomass such as corn stover. Three hydrolysis reactions were modeled, two heterogeneous reactions for cellulose breakdown to cellobiose and glucose and one homogeneous reaction for hydrolyzing cellobiose to glucose. Cellulase adsorption onto pretreated lignocellulose! was modeled via a Langmuir-type isotherm. The sugar products of cellulose hydrolysis, cellobiose and glucose, as well as xylose, the dominant sugar prevalent in most hemicellulose hydrolyzates, were assumed to competitively inhibit the enzymatic hydrolysis reactions. Model parameters were estimated from experimental data generated using dilute acid pretreated corn stover as the substrate. The model performed well in predicting cellulose hydrolysis trends at experimental conditions both inside and outside the design space used for parameter estimation and can be used for in silico process optimization. C1 Quintessence Technol LLC, Golden, CO 80401 USA. Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA. Natl Bioenergy Ctr, Biotechnol Div Fuels & Chem, Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Kadam, KL (reprint author), Quintessence Technol LLC, 16696 W Bayaud Dr, Golden, CO 80401 USA. EM kiran_kada@nrel.gov NR 47 TC 126 Z9 133 U1 4 U2 78 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 8756-7938 J9 BIOTECHNOL PROGR JI Biotechnol. Prog. PD MAY-JUN PY 2004 VL 20 IS 3 BP 698 EP 705 DI 10.1021/bp034316x PG 8 WC Biotechnology & Applied Microbiology; Food Science & Technology SC Biotechnology & Applied Microbiology; Food Science & Technology GA 826PU UT WOS:000221841800008 PM 15176871 ER PT J AU Hahn, JJ Ghirardi, ML Jacoby, WA AF Hahn, JJ Ghirardi, ML Jacoby, WA TI Effect of process variables on photosynthetic algal hydrogen production SO BIOTECHNOLOGY PROGRESS LA English DT Article ID CHLAMYDOMONAS-REINHARDTII; PHOTOPRODUCTION; MICROALGAE; CULTURE; H-2 AB Chlamydomonas reinhardtii is a green alga that can use the sun's energy to split water into O-2 and H-2. This is accomplished by means of a two-phase cycle, an aerobic growth phase followed by an anaerobic hydrogen production phase. The effects of process variables on hydrogen production are examined here. These variables include cell concentration, light intensity, and reactor design parameters that affect light transport and mixing. An optimum cell concentration and light intensity are identified, and two reactor designs are compared. The maximum hydrogen production observed in this study was 0.29 mL of hydrogen per milliliter of suspension. This was measured at atmospheric pressure during a 96 h production cycle. This corresponds to an average hydrogen production rate of 0.12 mmol/mL(.)h. C1 Univ Missouri, Dept Chem Engn, Columbia, MO 65211 USA. Natl Renewable Energy Lab, Golden, CO USA. RP Jacoby, WA (reprint author), Univ Missouri, Dept Chem Engn, Columbia, MO 65211 USA. EM jacoby@missouri.edu NR 15 TC 17 Z9 18 U1 0 U2 7 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 8756-7938 J9 BIOTECHNOL PROGR JI Biotechnol. Prog. PD MAY-JUN PY 2004 VL 20 IS 3 BP 989 EP 991 DI 10.1021/bp0341287 PG 3 WC Biotechnology & Applied Microbiology; Food Science & Technology SC Biotechnology & Applied Microbiology; Food Science & Technology GA 826PU UT WOS:000221841800047 PM 15176910 ER PT J AU Li, TT Larrucea, S Souza, S Leal, SM Lopez, JA Rubin, EM Nieswandt, B Bray, PF AF Li, TT Larrucea, S Souza, S Leal, SM Lopez, JA Rubin, EM Nieswandt, B Bray, PF TI Genetic variation responsible for mouse strain differences in integrin alpha(2) expression is associated with altered platelet responses to collagen SO BLOOD LA English DT Article ID 2 SILENT POLYMORPHISMS; RECEPTOR-GAMMA-CHAIN; C-TYPE LECTIN; IX-V COMPLEX; GLYCOPROTEIN-VI; INTEGRIN ALPHA(2)BETA(1); TYROSINE PHOSPHORYLATION; THROMBUS FORMATION; MURINE MODEL; IB-ALPHA AB As mouse models have become commonplace for studying hemostasis and thrombosis, we considered whether the mouse system had utility for assessing genetic alterations in platelet receptors. Platelets from 5 mouse strains (C57BL/6 [C57], FVB/N [FVB], BALB/c, C3H/He, and 129Sv) showed only minor differences in the expression of integrin alpha(IIb), integrin beta(3), glycoprotein (GP) Ibalpha, or GPVI across strains. However, FVB platelets expressed approximately 50% the level of integrin alpha(2) as platelets from other strains (P < .0001). We bred FVB mice with C57 and assessed alpha(2) expression in FVB/C57xFVB/C57 (F2) offspring. Linkage analysis demonstrated the gene responsible for alpha(2) levels is tightly linked to the D13mit260 marker (log odds [lod] score 6.7) near the alpha(2) gene. FVB platelets showed reduced aggregation and a longer lag phase to collagen. FVB and C57 platelets aggregated similarly to collagen-related peptide, but FVB platelets showed a reduction in rhodocytin-induced Syk and PLCgamma2 tyrosine phosphorylation. Thus, FVB platelets express half the level of alpha(2) as other mouse strains, a trait linked to the alpha(2) gene and seemingly responsible for reduced platelet aggregation to collagen. These strain differences serve as a useful model for the 2-fold difference in human platelet alpha(2)beta(1) expression and demonstrate that alpha(2)beta(1) participates in signaling during platelet activation. (C) 2004 by The American Society of Hematology. C1 Baylor Coll Med, Dept Med, Houston, TX 77030 USA. Baylor Coll Med, Dept Mol & Human Genet, Houston, TX 77030 USA. Lawrence Berkeley Labs, Berkeley, CA USA. Rudolf Virchow Ctr Expt Biomed Versbacher, Dept Vasc Biol, Wurzburg, Germany. RP Bray, PF (reprint author), Baylor Coll Med, Dept Med, 1 Baylor Plaza,BCM 286,N1319, Houston, TX 77030 USA. EM pbray@bcm.tmc.edu RI Larrucea, Susana/E-4743-2012 FU NHLBI NIH HHS [HL65229, HL66728] NR 47 TC 28 Z9 28 U1 1 U2 1 PU AMER SOC HEMATOLOGY PI WASHINGTON PA 1900 M STREET. NW SUITE 200, WASHINGTON, DC 20036 USA SN 0006-4971 J9 BLOOD JI Blood PD MAY 1 PY 2004 VL 103 IS 9 BP 3396 EP 3402 DI 10.1182/blood-2003-10-3721 PG 7 WC Hematology SC Hematology GA 822UJ UT WOS:000221565600035 PM 14739220 ER PT J AU Nalla, RK Kruzic, JJ Ritchie, RO AF Nalla, RK Kruzic, JJ Ritchie, RO TI On the origin of the toughness of mineralized tissue: microcracking or crack bridging? SO BONE LA English DT Article DE bone; fracture; toughening; crack bridging; microcracking ID CURVE FRACTURE-MECHANICS; HUMAN CORTICAL BONE; TOUGHENING MECHANISMS; GROWTH RESISTANCE; BRITTLE MATERIALS; FATIGUE DAMAGE; PROPAGATION; DENTIN; CERAMICS; SOLIDS AB Two major mechanisms that could potentially be responsible for toughening in mineralized tissues, such as bone and dentin, have been identified-microcracking and crack bridging. While evidence has been reported for both mechanisms, there has been no consensus thus far on which mechanism plays the dominant role in toughening these materials. In the present study, we seek to present definitive experimental evidence supporting crack bridging, rather than microcracking, as the most significant mechanism of toughening in cortical bone and dentin. In vitro fracture toughness experiments were conducted to measure the variation of the fracture resistance with crack extension [resistance-curve (R-curve) behavior] for both materials with special attention paid to changes in the sample compliance. Because these two toughening mechanisms induce opposite effects on the sample compliance, such experiments allow for the definitive determination of the dominant toughening mechanism, which in the present study was found to be crack bridging for microstructurally large crack sizes. The results of this work are of relevance from the perspective of developing a micromechanistic framework for understanding fracture behavior of mineralized tissue and in predicting failure in vivo. (C) 2004 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Ritchie, RO (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, 381 Hearst Min Bldg, Berkeley, CA 94720 USA. EM RORitchie@lbl.gov RI Ritchie, Robert/A-8066-2008; Kruzic, Jamie/M-3558-2014 OI Ritchie, Robert/0000-0002-0501-6998; Kruzic, Jamie/0000-0002-9695-1921 FU NIDCR NIH HHS [5R01 DE015633] NR 39 TC 114 Z9 118 U1 1 U2 31 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 8756-3282 J9 BONE JI Bone PD MAY PY 2004 VL 34 IS 5 BP 790 EP 798 DI 10.1016/j.bone.2004.02.001 PG 9 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA 821LI UT WOS:000221461700005 PM 15121010 ER PT J AU Kinney, JH Stolken, JS AF Kinney, JH Stolken, JS TI On Stolken and Kinney (Bone 2003;33(4): 494-504) - Response SO BONE LA English DT Letter ID VERTEBRAL CANCELLOUS BONE; TRABECULAR BONE; FAILURE C1 Lawrence Livermore Natl Lab, Dept Mech Engn, Livermore, CA 94550 USA. RP Kinney, JH (reprint author), Lawrence Livermore Natl Lab, Dept Mech Engn, Livermore, CA 94550 USA. EM jhkinney@llnl.gov NR 10 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 8756-3282 J9 BONE JI Bone PD MAY PY 2004 VL 34 IS 5 BP 913 EP 915 DI 10.1016/j.bone.2004.01.017 PG 3 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA 821LI UT WOS:000221461700020 ER PT J AU Kobayashi, J Tauchi, H Chen, B Sakamoto, S Matsuura, S Chen, D Komatsu, K AF Kobayashi, Junya Tauchi, Hiroshi Chen, Benjamin Sakamoto, Shuichi Matsuura, Shinya Chen, David Komatsu, Kenshi TI Recognition of DNA damage by NBS1/hMRE11/hRAD50 complex SO CELL STRUCTURE AND FUNCTION LA English DT Meeting Abstract DE DNA damage; DNA repair; histone H2AX C1 [Kobayashi, Junya] Hiroshima Univ, Dept Oral & Maxillofacial Radiol, Grad Sch Biomed Sci, Hiroshima 7348553, Japan. [Tauchi, Hiroshi] Ibaraki Univ, Sch Sci, Dept Environm Sci, Ibaraki 3108512, Japan. [Kobayashi, Junya; Chen, Benjamin; Chen, David] Lawrence Berkely Natl Lab, Div Life Sci, Dept Cell & Mol Biol, Berkeley, CA 94720 USA. [Sakamoto, Shuichi; Komatsu, Kenshi] Kyoto Univ, Ctr Radiat Biol, Kyoto 6068501, Japan. [Matsuura, Shinya] Hiroshima Univ, Res Inst Radiat Biol & Med, Hiroshima 7348553, Japan. NR 0 TC 0 Z9 0 U1 0 U2 0 PU JAPAN SOC CELL BIOLOGY PI KYOTO PA C/O NAKANISHI PRINTING SHIMODACHIURI OGAWA HIGASHI, KAMIGYO-KU, KYOTO, 602-8048, JAPAN SN 0386-7196 EI 1347-3700 J9 CELL STRUCT FUNCT JI Cell Struct. Funct. PD MAY PY 2004 VL 29 SU S BP 64 EP 64 PG 1 WC Cell Biology SC Cell Biology GA V44IL UT WOS:000202996300219 ER PT J AU Feibelman, PJ AF Feibelman, PJ TI What the stretch frequency spectrum of D2O/Ru(0001) does and does not mean SO CHEMICAL PHYSICS LETTERS LA English DT Article ID INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; PARTIAL DISSOCIATION; FUNDAMENTAL-ASPECTS; SOLID-SURFACES; WATER; RU(0001); METALS AB Based on O-D stretch frequencies, Denzler et al., reject partial dissociation of D2O molecules as the explanation of the measured structure of root3 x root3 - D2O/Ru(0 0 0 1). But it is largely the O-O distance that determines the O-D stretch frequency in an O-D...O bond of an H-bonded network. Thus, a D2O adlayer's stretch spectrum reflects its O-O distances, not its proportion of intact vs. dissociated molecules. This idea suggests that deuteron disorder in the heavy-water adlayer is the key to understanding its broad O-D stretch spectrum. (C) 2004 Elsevier B.V. All rights reserved. C1 Sandia Natl Labs, Surface & Interface Sci Dept, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, Surface & Interface Sci Dept, Mail Stop 1415, Albuquerque, NM 87185 USA. EM pjfeibe@sandia.gov NR 27 TC 21 Z9 21 U1 4 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 EI 1873-4448 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD MAY 1 PY 2004 VL 389 IS 1-3 BP 92 EP 95 DI 10.1016/j.cplett.2004.03.065 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 817CN UT WOS:000221155700017 ER PT J AU Fried, JS Torn, MS Mills, E AF Fried, JS Torn, MS Mills, E TI The impact of climate change on wildfire severity: A regional forecast for northern California SO CLIMATIC CHANGE LA English DT Article ID SOUTHERN CALIFORNIA; WILDLAND FIRE; BAJA-CALIFORNIA; REGIMES; MODEL; VEGETATION; FOREST AB We estimated the impact of climatic change on wildland fire and suppression effectiveness in northern California by linking general circulation model output to local weather and fire records and projecting fire outcomes with an initial-attack suppression model. The warmer and windier conditions corresponding to a 2 x CO(2) climate scenario produced fires that burned more intensely and spread faster in most locations. Despite enhancement of fire suppression efforts, the number of escaped fires ( those exceeding initial containment limits) increased 51% in the south San Francisco Bay area, 125% in the Sierra Nevada, and did not change on the north coast. Changes in area burned by contained fires were 41%, 41% and - 8%, respectively. When interpolated to most of northern California's wildlands, these results translate to an average annual increase of 114 escapes ( a doubling of the current frequency) and an additional 5,000 hectares ( a 50% increase) burned by contained fires. On average, the fire return intervals in grass and brush vegetation types were cut in half. The estimates reported represent a minimum expected change, or best-case forecast. In addition to the increased suppression costs and economic damages, changes in fire severity of this magnitude would have widespread impacts on vegetation distribution, forest condition, and carbon storage, and greatly increase the risk to property, natural resources and human life. C1 US Forest Serv, USDA, PNW Res Stn, Forest Inventory & Anal Program, Portland, OR 97208 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Fried, JS (reprint author), US Forest Serv, USDA, PNW Res Stn, Forest Inventory & Anal Program, POB 3890, Portland, OR 97208 USA. EM jsfried@fs.fed.us; mstorn@lbl.gov; emills@lbl.gov RI Torn, Margaret/D-2305-2015 NR 51 TC 96 Z9 100 U1 1 U2 29 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0165-0009 J9 CLIMATIC CHANGE JI Clim. Change PD MAY PY 2004 VL 64 IS 1-2 BP 169 EP 191 DI 10.1023/B:CLIM.0000024667.89579.ed PG 23 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 813ST UT WOS:000220927500010 ER PT J AU Hush, D Scovel, C AF Hush, D Scovel, C TI Fat-shattering of afne functions SO COMBINATORICS PROBABILITY & COMPUTING LA English DT Article AB We compute the fat-shattering function and the level fat-shattering function for important classes of affine functions. We observe that the level fat-shattering function and the fat shattering function are identical for these classes. In addition we observe that the notion that adding the constant term to linear functions increases the dimension by at most I is incorrect for fat-shattering and level fat-shattering. C1 Los Alamos Natl Lab, Modeling Algorithms & Informat Grp, Los Alamos, NM 87545 USA. RP Hush, D (reprint author), Los Alamos Natl Lab, Modeling Algorithms & Informat Grp, CCS-3,Mail Stop B265, Los Alamos, NM 87545 USA. EM dhush@lanl.gov; jcs@lanl.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH ST, NEW YORK, NY 10011-4211 USA SN 0963-5483 J9 COMB PROBAB COMPUT JI Comb. Probab. Comput. PD MAY PY 2004 VL 13 IS 3 BP 353 EP 360 DI 10.1017/S0963548303005911 PG 8 WC Computer Science, Theory & Methods; Mathematics; Statistics & Probability SC Computer Science; Mathematics GA 825CX UT WOS:000221734700006 ER PT J AU Liu, SL Hewson, JC Chen, JH Pitsch, H AF Liu, SL Hewson, JC Chen, JH Pitsch, H TI Effects of strain rate on high-pressure nonpremixed n-heptane autoignition in counterflow SO COMBUSTION AND FLAME LA English DT Article DE n-heptane; autoignition; counterflow; nonpremixed; strain effect ID RAPID COMPRESSION MACHINE; EVALUATED KINETIC DATA; DIFFUSION FLAMES; SELF-IGNITION; AIR MIXTURES; OXIDATION; COMBUSTION; TEMPERATURE; EXTINCTION AB The effect of steady strain on the transient autoignition of n-heptane at high pressures is studied numerically with detailed chemistry and transport in a counterflow configuration. Skeletal and reduced n-heptane mechanisms are developed and validated against experiments over a range of pressure and stoichiometries. Two configurations are investigated using the skeletal mechanism. First, the effect of strain rate on multistage n-heptane ignition is studied by imposing a uniform temperature for both the fuel and the oxidizer streams. Second, a temperature gradient between the fuel and the oxidizer streams is imposed. The global effect of strain on ignition is captured by a Damkohler number based on either the heat-release rate or the characteristic chain-branching rate. Results show that for low to moderate strain rates, both the low- and intermediate-temperature chemistries evolve in a manner comparable to that in homogeneous systems, including the negative temperature coefficient regime, but with somewhat slower evolution attributable to diffusive losses. At high strain rates diffusive losses inhibit ignition; for two-stage ignition, it is found that ignition is inhibited during the second, intermediate-temperature stage. The imposition of an overall temperature gradient further inhibits ignition because reaction zones for key branching reactions with large activation energies are narrowed. For a fixed oxidizer stream temperature that is not sufficiently high, a higher fuel temperature results in a shorter ignition delay provided that the heptyl radicals are mainly oxidized by low-temperature chemistry. As expected, an increase in pressure significantly increases reaction rates and reduces ignition delay time. However, with increasing pressure there is a shift toward single-stage low-temperature-dominated ignition which serves to delay ignition. (C) 2004 The Combustion Institute. Published by Elsevier Inc. All rights reserved. C1 Sandia Natl Labs, Combust Res Facil, Reacting Flow Res Dept, Livermore, CA 94551 USA. Stanford Univ, Ctr Turbulence Res, Stanford, CA 94305 USA. RP Liu, SL (reprint author), Sandia Natl Labs, Combust Res Facil, Reacting Flow Res Dept, POB 969,MS 9051, Livermore, CA 94551 USA. EM sliu@sandia.gov RI Pitsch, Heinz/E-1082-2014 OI Pitsch, Heinz/0000-0001-5656-0961 NR 36 TC 113 Z9 118 U1 4 U2 23 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD MAY PY 2004 VL 137 IS 3 BP 320 EP 339 DI 10.1016/j.combustflame.2004.01.011 PG 20 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA 818NJ UT WOS:000221251500005 ER PT J AU Phan, AV Gray, LJ Kaplan, T AF Phan, AV Gray, LJ Kaplan, T TI On the residue calculus evaluation of the 3-D anisotropic elastic Green's function SO COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING LA English DT Article DE Green's function; anisotropic elasticity; residue calculus; boundary element analysis ID DERIVATIVES AB An algorithm based upon the residue calculus for computing three-dimensional anisotropic elastic Green's function and its derivatives has been presented in Sales and Gray (Comput. Structures 1998; 69:247-254). It has been shown that the algorithm runs three to four times faster than the standard Wilson-Cruse interpolation scheme. However, the main concern of the Sales-Gray algorithm is its numerical instability that could lead to significant errors due to the existence of multiple poles of the residue. This paper proposes a remedy for the problem by adding the capability to evaluate the Green's function in case of multiple poles of the residue. Further, an improved numerical implementation based on the use of double-subscript-notation elastic constants in determining the Christoffel tensor is also at issue. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Univ S Alabama, Dept Mech Engn, Mobile, AL 36688 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. RP Phan, AV (reprint author), Univ S Alabama, Dept Mech Engn, Mobile, AL 36688 USA. EM vphan@jaguar1.usouthal.edu NR 8 TC 12 Z9 12 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1069-8299 J9 COMMUN NUMER METH EN JI Commun. Numer. Methods Eng. PD MAY PY 2004 VL 20 IS 5 BP 335 EP 341 DI 10.1002/cnm.675 PG 7 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 821AR UT WOS:000221432100001 ER PT J AU Colgate, SA Li, H AF Colgate, SA Li, H TI Acceleration mechanisms 2: force-free reconnection SO COMPTES RENDUS PHYSIQUE LA English DT Article DE UHE cosmic rays; acceleration mechanisms; force-free reconnection ID PARTICLE-ACCELERATION; MAGNETIC RECONNECTION; ASTROPHYSICAL SHOCKS; ENERGY; COLLISIONLESS; DISSIPATION; ORIGIN; PLASMA; FIELDS AB We suggest an unconventional view of the origin of most cosmic rays (CRs) in the universe. We propose that nearly every accelerated CR was part of the parallel current that maintains all force-free (f-f) magnetic fields. Charged particles are accelerated by the electric field E-parallel to produced by reconnection parallel to the magnetic field B. The inferred total energy in extragalactic cosmic rays is similar to10(60) ergs per galaxy spacing volume, provided that the assumed acceleration mechanisms do not preferentially only accelerate ultra high energy cosmic rays (UHECRs). This total energy is quite large, about 10(5) times the parent galactic CR or magnetic energy. We argue that the formation energy of supermassive black holes (SMBHs) at galaxy centers, similar to10(62) ergs, becomes the only feasible source. We propose an efficient dynamo process which converts gravitational free energy into magnetic energy in an accretion disk around a SMBH. Aided by Keplerian winding, this dynamo converts a poloidal seed field into f-f fields, which are transported into the general intergalactic medium (IGM) eventually. This magnetic energy must also have been efficiently converted into particle energies, as evidenced by the radiation from energetic particles. In this view CRs of the IGM are the result of the continuing dissipation, in a Hubble time, of this free energy, by acceleration in situ within the f-f fields confined within the super-galactic walls and filaments of large scale structures. In addition, UHECRs are diffusively lost to the galactic voids at time scales below the GZK attenuation time, similar to10(8) years. Similarly, within the galaxy we expect that the winding by the disk rotation of the galaxy, by the rotation energy of magnetized neutron stars, and by the Keplerian winding of star formation disks are efficient sources of f-f magnetic field energy and hence the sources of galactic CR acceleration. (C) 2004 Academie des sciences. Published by Elsevier SAS. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Colgate, SA (reprint author), Los Alamos Natl Lab, POB 1663,MS 227, Los Alamos, NM 87545 USA. EM colgate@lanl.gov; hli@lanl.gov NR 23 TC 10 Z9 10 U1 0 U2 1 PU EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER PI PARIS PA 23 RUE LINOIS, 75724 PARIS, FRANCE SN 1631-0705 J9 CR PHYS JI C. R. Phys. PD MAY PY 2004 VL 5 IS 4 BP 431 EP 440 DI 10.1016/j.crhy.2004.04.002 PG 10 WC Astronomy & Astrophysics; Physics, Multidisciplinary SC Astronomy & Astrophysics; Physics GA 831OQ UT WOS:000222204500003 ER PT J AU Gurtubay, IG Ku, W Pitarke, JM Eguiluz, AG AF Gurtubay, IG Ku, W Pitarke, JM Eguiluz, AG TI Effects of the crystal structure in the dynamical electron density-response of hcp transition metals SO COMPUTATIONAL MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT 12th International Workshop on Computational Materials Science CY SEP 23-29, 2002 CL Sardinia, ITALY ID AB-INITIO CALCULATIONS; ENERGY-LOSS SPECTRA; CORRELATED ELECTRONS; PLASMON DISPERSION; FUNCTIONAL THEORY; BAND-STRUCTURE; EXCITATIONS; SCATTERING; LIFETIME; ALUMINUM AB We present an all-electron study of the dynamical density-response function of hexagonal close-packed transition metals Sc and Ti. We elucidate various aspects of the interplay between the crystal structure and the electron dynamics by investigating the loss function, and the associated dielectric function, for wave vector transfers perpendicular and parallel to the hexagonal plane. As expected, but contrary to recent work, we find that the free-electron-like aspects of the dynamical response are rather isotropic for small wave vectors. The crystal local-field effects are found to have an impact on the plasmon energy for small wave vectors, which gives rise to an interplay with the exchange-correlation effects built into the many-body kernel. The loss function lineshape shows a significant dependence on propagation direction; in particular, for propagation on the hexagonal plane the plasmon hybridizes substantially with fine structure due to d-electron transitions, and its dispersion curve becomes difficult to establish, beyond the small wave vector limit. The response is calculated in the framework of time-dependent density functional theory (TDDFT), based on a full-potential linearized augmented-plane-wave (LAPW) ground state, in which the exchange-correlation effects are treated in the local-density approximation. (C) 2004 Elsevier B.V. All rights reserved. C1 Euskal Herriko Unibertsitatea, Mat KOndensatuaren Fis Saila, Bilbao 48080, Spain. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. CSIC UPV EHU, Donostia Int Phys Ctr, Donostia San Sebastian, Basque Country, Spain. CSIC UPV EHU, Ctr Mixto, Donostia San Sebastian, Basque Country, Spain. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Euskal Herriko Unibertsitatea, Mat KOndensatuaren Fis Saila, 644 Posta Kutxatila, Bilbao 48080, Spain. EM wmbgagui@lg.ehu.es RI CSIC-UPV/EHU, CFM/F-4867-2012; Pitarke, Jose/C-8602-2009; DONOSTIA INTERNATIONAL PHYSICS CTR., DIPC/C-3171-2014 OI Pitarke, Jose/0000-0002-8253-8028; NR 23 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0256 EI 1879-0801 J9 COMP MATER SCI JI Comput. Mater. Sci. PD MAY PY 2004 VL 30 IS 1-2 BP 104 EP 109 DI 10.1016/j.commatsci.2004.01.016 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA 817ZE UT WOS:000221214600018 ER PT J AU Hyman, JM Steinberg, S AF Hyman, JM Steinberg, S TI The convergence of mimetic discretization for rough grids SO COMPUTERS & MATHEMATICS WITH APPLICATIONS LA English DT Article DE mimetic discretization; convergence; finite-volume method ID FINITE-DIFFERENCE METHODS; LOGICALLY RECTANGULAR GRIDS; NATURAL DISCRETIZATIONS; OPERATORS; DIVERGENCE; GRADIENT; APPROXIMATIONS; ALGORITHMS; EQUATIONS; 4TH-ORDER AB We prove that the mimetic finite-difference discretizations of Laplace's equation converges on rough logically-rectangular grids with convex cells. Mimetic discretizations for the invariant operators' divergence, gradient, and curl satisfy exact discrete analogs of many of the important theorems of vector calculus. The mimetic discretization of the Laplacian is given by the composition of the discrete divergence and gradient. We first construct a mimetic discretization on a single cell by geometrically constructing inner products for discrete scalar and vector fields, then constructing a finite-volume discrete divergence, and then constructing a discrete gradient that is consistent with the discrete divergence theorem. This construction is then extended to the global grid. We demonstrate the convergence for the two-dimensional Laplace equation with Dirichlet boundary conditions on grids with a lower bound on the angles in the cell corners and an upper bound on the cell aspect ratios. The best convergence rate to be expected is first order, which is what we prove. The techniques developed apply to far more general initial boundary-value problems. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Steinberg, S (reprint author), Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA. EM stanly@math.unm.edu NR 39 TC 18 Z9 18 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0898-1221 J9 COMPUT MATH APPL JI Comput. Math. Appl. PD MAY-JUN PY 2004 VL 47 IS 10-11 BP 1565 EP 1610 DI 10.1016/j.camwa.2004.06.008 PG 46 WC Mathematics, Applied SC Mathematics GA 846KP UT WOS:000223314700008 ER PT J AU Schultz, E AF Schultz, E TI Worms and viruses: are we losing control? SO COMPUTERS & SECURITY LA English DT Editorial Material C1 Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA. RP Schultz, E (reprint author), Univ Calif Berkeley, Berkeley Lab, Cyclotron Rd,MS 50A-3111, Berkeley, CA 94720 USA. EM eeugeneschultz2@aot.com NR 0 TC 1 Z9 1 U1 2 U2 2 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0167-4048 J9 COMPUT SECUR JI Comput. Secur. PD MAY PY 2004 VL 23 IS 3 BP 179 EP 180 DI 10.1016/j.cose.2004.04.001 PG 2 WC Computer Science, Information Systems SC Computer Science GA 826UO UT WOS:000221855100001 ER PT J AU Post, D AF Post, D TI Frontiers of simulation, Part II SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Editorial Material C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Post, D (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM post@lanl.gov RI Post, Douglass/L-3773-2014 OI Post, Douglass/0000-0001-9271-0023 NR 0 TC 1 Z9 1 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1521-9615 J9 COMPUT SCI ENG JI Comput. Sci. Eng. PD MAY-JUN PY 2004 VL 6 IS 3 BP 16 EP 17 DI 10.1109/MCISE.2004.1289304 PG 2 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 813MN UT WOS:000220911300005 ER PT J AU Winter, CL Springer, EP Costigan, K Fasel, P Mniszewski, S Zyvoloski, G AF Winter, CL Springer, EP Costigan, K Fasel, P Mniszewski, S Zyvoloski, G TI Virtual watersheds: Simulating the water balance of the Rio Grande basin SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article ID HYDROLOGIC MODEL; SYSTEM AB Managers of water resources in arid and semi-arid regions must allocate increasingly variable surface water supplies and limited groundwater resources. This challenge is leading to a new generation of detailed computational models that can link multiple sources to a wide range of demands. C1 Natl Ctr Atmospher Res, Boulder, CO 80307 USA. Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA. Los Alamos Natl Lab, Atmospher Climate & Environm Dynam Grp, Los Alamos, NM USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM USA. RP Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA. EM lwinter@ucar.edu; everetts@lanl.gov; krc@lanl.gov; pkf@lanl.gov; smm@lanl.gov; gaz@lanl.gov RI Springer, Everett/B-6376-2012; Winter, C. Larrabee/D-3918-2013 OI Springer, Everett/0000-0002-9816-8148; NR 12 TC 9 Z9 9 U1 0 U2 4 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1521-9615 EI 1558-366X J9 COMPUT SCI ENG JI Comput. Sci. Eng. PD MAY-JUN PY 2004 VL 6 IS 3 BP 18 EP 26 DI 10.1109/MCISE.2004.1289305 PG 9 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 813MN UT WOS:000220911300006 ER PT J AU Gisler, GR Weaver, RP Mader, CL Gittings, ML AF Gisler, GR Weaver, RP Mader, CL Gittings, ML TI Two- and three-dimensional asteroid impact simulations SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article ID CRETACEOUS-TERTIARY BOUNDARY; ELTANIN AB Performing a series of simulations of asteroid impacts using the SAGE code, the authors attempt to estimate the effects of tsunamis and other important environmental events. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sci Applicat Int, San Diego, CA 92121 USA. RP Gisler, GR (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM grg@lanl.gov NR 11 TC 13 Z9 13 U1 1 U2 8 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1521-9615 J9 COMPUT SCI ENG JI Comput. Sci. Eng. PD MAY-JUN PY 2004 VL 6 IS 3 BP 46 EP 55 DI 10.1109/MCISE.2004.1289308 PG 10 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 813MN UT WOS:000220911300009 ER PT J AU Downing, G Dubois, PF Cottom, T AF Downing, G Dubois, PF Cottom, T TI Data sharing in scientific simulations SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article C1 Univ Texas, Dept Comp Sci, Austin, TX 78712 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Downing, G (reprint author), Univ Texas, Dept Comp Sci, Austin, TX 78712 USA. EM downing@cs.utexas.edu; paul@pfdubois.com; cottom1@llnl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1314 USA SN 1521-9615 J9 COMPUT SCI ENG JI Comput. Sci. Eng. PD MAY-JUN PY 2004 VL 6 IS 3 BP 87 EP 96 DI 10.1109/MCISE.2004.1289316 PG 12 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 813MN UT WOS:000220911300016 ER PT J AU Martin, JC Yoshida, TM Graves, SW AF Martin, JC Yoshida, TM Graves, SW TI Spectral analysis flow cytometry SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 30 EP 30 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900022 ER PT J AU Ferris, MM Habbersett, RC Wolinsky, M Jett, JH Yoshida, TM Keller, R AF Ferris, MM Habbersett, RC Wolinsky, M Jett, JH Yoshida, TM Keller, R TI Single-molecule measurement statistics and applications in flow cytometry sizing of DNA fragments SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 31 EP 31 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900025 ER PT J AU Murphy, RF Novo, D Roederer, M Sudar, D Treister, A Wood, JCS AF Murphy, RF Novo, D Roederer, M Sudar, D Treister, A Wood, JCS TI The common cytometry dictionary SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Calif Los Angeles, Los Angeles, CA USA. NIAID, NIH, Vaccine Res Ctr, Bethesda, MD 20892 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Tree Star Inc, San Carlos, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 51 EP 51 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900080 ER PT J AU Graves, SW Ward, MD Habbersett, RC Martin, JC Grodzinski, P Nolan, JP AF Graves, SW Ward, MD Habbersett, RC Martin, JC Grodzinski, P Nolan, JP TI Design and quantitative evaluation of microfludic flow cells SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 52 EP 52 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900082 ER PT J AU Nolan, JP Habbersett, RC Deshpande, A Yan, XM Bell, CS Marrone, BL AF Nolan, JP Habbersett, RC Deshpande, A Yan, XM Bell, CS Marrone, BL TI Analysis of sub-micron biological particles by high sensitivity flow cytometry SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 2 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 52 EP 53 PG 2 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900084 ER PT J AU Langlois, R Davies, RW Trebes, JE Colston, BW Turteltaub, KW Milanovich, FP AF Langlois, R Davies, RW Trebes, JE Colston, BW Turteltaub, KW Milanovich, FP TI Serum antigen profile alterations in hemodialysis patients SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA USA. Diablo Nephrol Med Grp, Walnut Creek, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 60 EP 61 PG 2 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900108 ER PT J AU Gray, JW AF Gray, JW TI Integrative cancer biology SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Lawrence Berkeley Natl Lab, Div Life Sci, San Francisco, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 62 EP 62 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900112 ER PT J AU Crissman, HA Sanders, CK Cui, HH Steinkamp, JA AF Crissman, HA Sanders, CK Cui, HH Steinkamp, JA TI Alterations in nucleic acid structure correlate with changes in fluorescence lifetime of specific intercalating probes SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 70 EP 71 PG 2 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900137 ER PT J AU Pinkel, D Brown, N Oseroff, V Hamilton, G Kumler, J Scheeff, M Albertson, D AF Pinkel, D Brown, N Oseroff, V Hamilton, G Kumler, J Scheeff, M Albertson, D TI High performance CCD imaging system for microarrays and other large format objects SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Univ Calif San Francisco, Sch Med, Lab Med, San Francisco, CA USA. Univ Calif San Francisco, Ctr Canc, San Francisco, CA USA. Coastal Opt Syst Inc, W Palm Beach, FL USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Calif San Francisco, Canc Res Inst, San Francisco, CA 94143 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 74 EP 74 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900145 ER PT J AU Deshpande, A Wheeler, CM William, HC Torrez-Martinez, N White, PS Valdez, YE Nolan, JP AF Deshpande, A Wheeler, CM William, HC Torrez-Martinez, N White, PS Valdez, YE Nolan, JP TI Genetic variation in antigen processing genes and susceptibility to HPV16-associated cervical cancer SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. Univ New Mexico, Hope Clin, Albuquerque, NM 87131 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 91 EP 92 PG 2 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900198 ER PT J AU Patwardhan, A Dixon, S Dutta, S Strittmatter, E Camp, D Smith, R Pallavicini, MG AF Patwardhan, A Dixon, S Dutta, S Strittmatter, E Camp, D Smith, R Pallavicini, MG TI High-throughput proteomic characterization of membrane proteins in breast cancer cell lines SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Univ Calif San Francisco, Sch Pharm, San Francisco, CA 94143 USA. Univ Calif San Francisco, Ctr Canc, San Francisco, CA 94143 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 111 EP 111 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900253 ER PT J AU Stepanauskas, R Glenn, TC Tuckfield, C Jagoe, CH Lindell, A McArthur, JV AF Stepanauskas, R Glenn, TC Tuckfield, C Jagoe, CH Lindell, A McArthur, JV TI Links between the resistance to heavy metals and antibiotics among environmental bacteria, examined flow-cytometrically using cell viability probes SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC USA. Westinghouse Savannah River Co, Aiken, SC USA. RI Glenn, Travis/A-2390-2008 NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 128 EP 128 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900306 ER PT J AU Nolan, JP Deshpande, A Woods, TA Graves, SW AF Nolan, JP Deshpande, A Woods, TA Graves, SW TI Binding and uptake of bacterial toxins by mammalian cells SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 132 EP 132 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900319 ER PT J AU Martin, JC Espy, MA Bergstrom, AC Graves, SW Carr, C Matsson, TJ Matlachov, AN Kraus, RH Nolan, JP AF Martin, JC Espy, MA Bergstrom, AC Graves, SW Carr, C Matsson, TJ Matlachov, AN Kraus, RH Nolan, JP TI A magnetic field sensing flow cytometer SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 147 EP 147 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900366 ER PT J AU Graves, SW Woods, TA Nolan, JP AF Graves, SW Woods, TA Nolan, JP TI Tools and approaches for protein interaction studies using microsphere arrays SO CYTOMETRY PART A LA English DT Meeting Abstract CT 22nd Congress of the International-Society-for-Analytical-Cytology CY MAY 22-27, 2004 CL Montpellier, FRANCE SP Ins Soc Analyt Cytol C1 Los Alamos Natl Lab, Los Alamos, NM USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0196-4763 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2004 VL 59A IS 1 BP 149 EP 149 PG 1 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 819MV UT WOS:000221319900374 ER PT J AU Yantasee, W Lin, YH Fryxell, GE Wang, ZM AF Yantasee, W Lin, YH Fryxell, GE Wang, ZM TI Carbon paste electrode modified with carbamoylphosphonic acid functionalized mesoporous silica: A new mercury-free sensor for uranium detection SO ELECTROANALYSIS LA English DT Article DE uranium; sensor; modified electrode; mesoporous silica ID CATHODIC STRIPPING VOLTAMMETRY; SELF-ASSEMBLED MONOLAYERS; SUPPORTS; COMPLEXES; CHROMIUM; LIGAND; WATER; OXIDE AB This study reports a new approach for developing a uranium electrochemical sensor that is mercury-free, solid-state, and has less chance for ligand depletion than existing sensors. A carbon-paste electrode modified with carbamoylphosphonic acid self-assembled monolayer on mesoporous silica was developed for uranium detection based on an adsorptive square-wave stripping votammetry technique. Voltammetric responses for uranium detection are reported as a function of pH, preconcentration time, and aqueous phase uranium concentration. The uranium detection limit is 25 ppb after 5 minutes preconcentration and improved to 1 ppb after 20 minutes preconcentration. The relative standard deviations are normally less than 5%. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Lin, YH (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA. EM Yuehe.Lin@pnl.gov RI Wang, Zheming/E-8244-2010; Lin, Yuehe/D-9762-2011 OI Wang, Zheming/0000-0002-1986-4357; Lin, Yuehe/0000-0003-3791-7587 NR 20 TC 36 Z9 37 U1 0 U2 9 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1040-0397 J9 ELECTROANAL JI Electroanalysis PD MAY PY 2004 VL 16 IS 10 BP 870 EP 873 DI 10.1002/elan.200302868 PG 4 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA 826KK UT WOS:000221827800010 ER EF