FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Brooks, ED McKinley, MS Daffin, F Szoke, A AF Brooks, ED McKinley, MS Daffin, F Szoke, A TI Symbolic implicit Monte Carlo radiation transport in the difference formulation: a piecewise constant discretization SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE difference formulation; radiation transport; implicit Monte Carlo ID ASYMPTOTIC ANALYSIS; EQUATION; SCHEME; TIME AB The equations of radiation transport for thermal photons are notoriously difficult to solve in thick media without resorting to asymptotic approximations such as the diffusion limit. One source of this difficulty is that in thick, absorbing media, thermal emission and absorption are almost completely balanced. A new formulation for thermal radiation transport, called the difference formulation, was recently introduced in order to remove the stiff balance between emission and absorption. In the new formulation, thermal emission is replaced by derivative terms that become small in thick media. It was proposed that the difficulties of solving the transport equation in thick media would be ameliorated by the difference formulation, while preserving full rigor and accuracy of the transport solution in the streaming limit. In this paper, the transport equation is solved by the symbolic implicit Monte Carlo method and comparisons are made between the standard formulation and the difference formulation. The method is easily adapted to the derivative source terms of the difference formulation, and a remarkable reduction in noise is obtained when the difference formulation is applied to problems involving thick media. (c) 2004 Elsevier Inc. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Brooks, ED (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM brooks3@llnl.gov NR 23 TC 5 Z9 5 U1 0 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 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAY 20 PY 2005 VL 205 IS 2 BP 737 EP 754 DI 10.1016/j.jcp.2004.11.026 PG 18 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 922WO UT WOS:000228870800017 ER PT J AU Rybin, AV Vadeiko, IP Bishop, AR AF Rybin, AV Vadeiko, IP Bishop, AR TI Driving slow-light solitons by a controlling laser field SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID ATOMIC MEDIUM; PULSES; STORAGE; SYSTEM; VAPOR; GAS AB In the framework of the nonlinear Lambda-model we investigate propagation of a slow-light soliton in atomic vapours and Bose-Einstein condensates. The velocity of the slow-light soliton is controlled by a time-dependent background field created by a controlling laser. For a fairly arbitrary time dependence of the field we find the dynamics of the slow-light soliton inside the medium. We provide an analytical description for the nonlinear dependence of the velocity of the signal on the controlling field. If the background field is turned off at some moment of time, the signal stops. We find the location and shape of the spatially localized memory bit imprinted into the medium. We show that the process of writing optical information can be described in terms of scattering data for the underlying scattering problem. C1 Univ Jyvaskyla, Dept Phys, FIN-40351 Jyvaskyla, Finland. Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Rybin, AV (reprint author), Univ Jyvaskyla, Dept Phys, POB 35, FIN-40351 Jyvaskyla, Finland. EM andrei.rybin@phys.jyu.fi; iv3@st-andrews.ac.uk; arb@lanl.gov NR 16 TC 7 Z9 7 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD MAY 20 PY 2005 VL 38 IS 20 BP L357 EP L362 DI 10.1088/0305-4470/38/20/L04 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 936RL UT WOS:000229873000004 ER PT J AU Victorov, A Radke, C Prausnitz, J AF Victorov, A Radke, C Prausnitz, J TI Equilibrium swelling and mesoscopic structure of a diblock copolymer gel in a selective solvent SO MOLECULAR PHYSICS LA English DT Article ID STRONG-SEGREGATION THEORY; BLOCK-COPOLYMER; BICONTINUOUS PHASES; POLYMER-CHAINS; BEHAVIOR AB Our previous analytic model [A.I. Victorov, C. J. Radke, J. M. Prausnitz. Molec. Phys., 100, 2277 ( 2002)] of a block-copolymer gel swollen in selective solvent was obtained from self-consistent field theory in the strong-segregation approximation; it takes into account the structure of the gel on the mesoscopic scale but is restricted to the case where the solvent-selective polymer subchains are located in the inner ( minority) domains. In this work, the model is generalized to include swollen outer domains. The dependence of the equilibrium microdomain size on solvent uptake has been established. We calculate equilibrium swelling and determine relative stabilities for gels of different morphologies. Predicted equilibrium profiles of polymer segments are compared with computer simulation. Based on the average-solvent-fraction approximation, results obtained for an athermal solvent are very close to those from equilibrium profiles. Attention is given to the effect of partial restrictions in self-assembly of polymer chains on microdomain spacing and on equilibrium swelling. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. St Petersburg State Univ, Dept Chem, St Petersburg 198504, Russia. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Prausnitz, J (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. EM alexi@nonel.pu.ru RI Victorov, Alexey/A-2963-2012 OI Victorov, Alexey/0000-0001-9994-1297 NR 23 TC 9 Z9 9 U1 0 U2 6 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD MAY 20 PY 2005 VL 103 IS 10 BP 1431 EP 1440 DI 10.1080/00268970500075479 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 927HD UT WOS:000229182200009 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP 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, AE 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 Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T 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 Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ 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 Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R 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 Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Mohapatra, AK Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Pierini, M Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Di Lodovico, F 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 Hodgkinson, MC Lafferty, GD Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Cerizza, G Lazzaro, A Lombardo, V 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 Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G 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 Lu, M 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 Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA 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 Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R 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 Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Peters, K Schroeder, T Steinke, M Boyd, JT Burke, JP 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, AE 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 Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T 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 Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Maly, E Nogowski, R Otto, S Petzold, A Schott, G Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ 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 Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R 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 Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Mohapatra, AK Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Pierini, M Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Di Lodovico, F 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 Hodgkinson, MC Lafferty, GD Naisbit, MT Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Cerizza, G Lazzaro, A Lombardo, V 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 Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G 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 Lu, M 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 Voci, C Benayoun, M Briand, H Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O John, MJJ Leruste, P Malcles, J Ocariz, J Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA 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 Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Hamano, K Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BaBar Collaboration TI Measurements of branching fractions and time-dependent CP-violating asymmetries in B -> eta ' K decays SO PHYSICAL REVIEW LETTERS LA English DT Article ID QCD FACTORIZATION; B DECAYS; AMPLITUDES; PHYSICS; ETA' AB We present measurements of the B ->eta(')K branching fractions; for B+->eta(')K(+) we measure also the time-integrated charge asymmetry A(ch), and for B-0->eta(')K(S)(0) the time-dependent CP-violation parameters S and C. The data sample corresponds to 232x10(6) B (B) over bar pairs produced by e(+)e(-) annihilation at the Upsilon(4S). The results are B(B ->eta(')K(+))=(68.9 +/- 2.0 +/- 3.2)x10(-6), B(B-0->eta(')K(0))=(67.4 +/- 3.3 +/- 3.2)x10(-6), A(ch)=0.033 +/- 0.028 +/- 0.005, S=0.30 +/- 0.14 +/- 0.02, and C=-0.21 +/- 0.10 +/- 0.02, where the first error quoted is statistical and the second is systematic. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, 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 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. 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. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, 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. 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. Univ Milan, 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. Univ Naples Federico II, 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. 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 & Hautes Energies, F-75252 Paris, France. Univ Paris 07, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pisa, 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. Univ Roma La Sapienza, 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 Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI Neri, Nicola/G-3991-2012; Rotondo, Marcello/I-6043-2012; Sarti, Alessio/I-2833-2012; Patrignani, Claudia/C-5223-2009; de Groot, Nicolo/A-2675-2009; de Sangro, Riccardo/J-2901-2012; Forti, Francesco/H-3035-2011; Della Ricca, Giuseppe/B-6826-2013; Cavallo, Nicola/F-8913-2012; Peters, Klaus/C-2728-2008; Bellini, Fabio/D-1055-2009; Saeed, Mohammad Alam/J-7455-2012; Lista, Luca/C-5719-2008; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; 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; Lusiani, Alberto/A-3329-2016; Di Lodovico, Francesca/L-9109-2016; M, Saleem/B-9137-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Sarti, Alessio/0000-0001-5419-7951; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Forti, Francesco/0000-0001-6535-7965; Della Ricca, Giuseppe/0000-0003-2831-6982; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; 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; Lusiani, Alberto/0000-0002-6876-3288; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 28 TC 86 Z9 86 U1 0 U2 7 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 20 PY 2005 VL 94 IS 19 AR 191802 DI 10.1103/PhysRevLett.94.191802 PG 7 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000008 PM 15904359 ER PT J AU Belonoshko, AB Skorodumova, NV Rosengren, A Ahuja, R Johansson, B Burakovsky, L Preston, DL AF Belonoshko, AB Skorodumova, NV Rosengren, A Ahuja, R Johansson, B Burakovsky, L Preston, DL TI High-pressure melting of MgSiO3 SO PHYSICAL REVIEW LETTERS LA English DT Article ID POST-PEROVSKITE PHASE; ABINITIO MOLECULAR-DYNAMICS; LOWER MANTLE; (MG,FE)SIO3 PEROVSKITE; SIMULATIONS; TRANSITION; TEMPERATURES; STATE; FORSTERITE; EQUATIONS AB The melting curve of MgSiO3 perovskite has been determined by means of ab initio molecular dynamics complemented by effective pair potentials, and a new phenomenological model of melting. Using first principles ground state calculations, we find that the MgSiO3 perovskite phase transforms into post perovskite at pressures above 100 GPa, in agreement with recent theoretical and experimental studies. We find that the melting curve of MgSiO3, being very steep at pressures below 60 GPa, rapidly flattens on increasing pressure. The experimental controversy on the melting of the MgSiO3 perovskite at high pressures is resolved, confirming the data by Zerr and Boehler. C1 Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden. Royal Inst Technol, AlbaNova Univ Ctr, 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, 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. OI Belonoshko, Anatoly/0000-0001-7531-3210 NR 38 TC 28 Z9 29 U1 0 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 20 PY 2005 VL 94 IS 19 AR 195701 DI 10.1103/PhysRevLett.94.195701 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000034 PM 16090187 ER PT J AU Dvali, G Papucci, M Schwartz, MD AF Dvali, G Papucci, M Schwartz, MD TI Infrared Lorentz violation and slowly instantaneous electricity SO PHYSICAL REVIEW LETTERS LA English DT Article AB We study a modification of electromagnetism which violates Lorentz invariance at large distances. In this theory, electromagnetic waves are massive, but the static force between charged particles is Coulomb, not Yukawa. At very short distances the theory looks just like QED. But for distances larger than 1/m the massive dispersion relation of the waves can be appreciated, and the Coulomb force can be used to communicate faster than the speed of light. In fact, electrical signals are transmitted instantly, but take a time similar to 1/m to build up to full strength. After that, undamped oscillations of the electric field are set in and continue until they are dispersed by the arrival of the Lorentz-obeying part of the transmission. Experimental constraints imply that the Compton wavelength of the photon may be as small as 6000 km. This bound is weaker than for a Lorentz-invariant mass, essentially because the Coulomb constraint is removed. C1 NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Dvali, G (reprint author), NYU, Dept Phys, Ctr Cosmol & Particle Phys, 4 Washington Pl, New York, NY 10003 USA. EM gd23@nyu.edu; papucci@berkeley.edu; mdschwartz@lbl.gov OI SCHWARTZ, MATTHEW/0000-0001-6344-693X NR 11 TC 20 Z9 20 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 20 PY 2005 VL 94 IS 19 AR 191602 DI 10.1103/PhysRevLett.94.191602 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000006 PM 16090159 ER PT J AU Gao, JB Rao, NSV Hu, J Ai, J AF Gao, JB Rao, NSV Hu, J Ai, J TI Quasiperiodic route to chaotic dynamics of Internet transport protocols SO PHYSICAL REVIEW LETTERS LA English DT Article ID INJECTED SEMICONDUCTOR-LASER; NOISE-INDUCED CHAOS; TIME-SERIES; DETERMINISTIC CHAOS; SELF-SIMILARITY; MODEL AB We show that the dynamics of transmission control protocol (TCP) may often be chaotic via a quasiperiodic route consisting of more than two independent frequencies, by employing a commonly used ns-2 network simulator. To capture the essence of the additive increase and multiplicative decrease mechanism of TCP congestion control, and to qualitatively describe why and when chaos may occur in TCP dynamics, we develop a 1D discrete map. The relevance of these chaotic transport dynamics to real Internet connections is discussed. C1 Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA. Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. Rensselaer Polytech Inst, Dept Elect Comp & Syst Engn, Troy, NY 12180 USA. RP Gao, JB (reprint author), Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA. NR 33 TC 12 Z9 13 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 20 PY 2005 VL 94 IS 19 AR 198702 DI 10.1103/PhysRevLett.94.198702 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000071 PM 16090224 ER PT J AU McElroy, K Lee, DH Hoffman, JE Lang, KM Lee, J Hudson, EW Eisaki, H Uchida, S Davis, JC AF McElroy, K Lee, DH Hoffman, JE Lang, KM Lee, J Hudson, EW Eisaki, H Uchida, S Davis, JC TI Coincidence of checkerboard charge order and antinodal state decoherence in strongly underdoped superconducting Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW LETTERS LA English DT Article ID QUASI-PARTICLES; INHOMOGENEITY; TEMPERATURE; DEPENDENCE AB The doping dependence of nanoscale electronic structure in superconducting Bi2Sr2CaCu2O8+delta is studied by scanning tunneling microscopy. At all dopings, the low energy density-of-states modulations are analyzed according to a simple model of quasiparticle interference and found to be consistent with Fermi-arc superconductivity. The superconducting coherence peaks, ubiquitous in near-optimal tunneling spectra, are destroyed with strong underdoping and a new spectral type appears. Exclusively in regions exhibiting this new spectrum, we find local "checkerboard" charge ordering of high energy states, with a wave vector of (Q) over right arrow=(+/- 2 pi/4.5a(0),0); (0,+/- 2 pi/4.5a(0))+/- 15%. Surprisingly, this spatial ordering of high energy states coexists harmoniously with the low energy Bogoliubov quasiparticle states. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14850 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Colorado Coll, Dept Phys, Colorado Springs, CO 80305 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. AIST, Tsukuba, Ibaraki 3058568, Japan. Univ Tokyo, Dept Phys, Tokyo 1138656, Japan. RP McElroy, K (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM jcdavis@ccmr.cornell.edu RI Hudson, Eric/C-2746-2008; Hoffman, Jennifer/H-4334-2011; mcelroy, kyle/D-1816-2013 OI Hudson, Eric/0000-0001-7064-0351; Hoffman, Jennifer/0000-0003-2752-5379; NR 30 TC 308 Z9 309 U1 2 U2 30 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 20 PY 2005 VL 94 IS 19 AR 197005 DI 10.1103/PhysRevLett.94.197005 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000049 PM 16090202 ER PT J AU Rvachev, MM Benmokhtar, F Penel-Nottaris, E Aniol, KA Bertozzi, W Boeglin, WU Butaru, F Calarco, JR Chai, Z Chang, CC Chen, JP Chudakov, E Cisbani, E Cochran, A Cornejo, J Dieterich, S Djawotho, P Duran, W Epstein, MB Finn, JM Fissum, KG Frahi-Amroun, A Frullani, S Furget, C Garibaldi, F Gayou, O Gilad, S Gilman, R Glashausser, C Hansen, JO Higinbotham, DW Hotta, A Hu, B Iodice, M Iomni, R de Jager, CW Jiang, X Jones, MK Kelly, JJ Kox, S Kuss, M Laget, JM De Leo, R LeRose, JJ Liatard, E Lindgren, R Liyanage, N Lourie, RW Malov, S Margaziotis, DJ Markowitz, P Merchez, F Michaels, R Mitchell, J Mougey, J Perdrisat, CF Punjabi, VA Quemener, G Ransome, RD Real, JS Roche, R Sabatie, F Saha, A Simon, D Strauch, S Suleiman, R Tamae, T Templon, JA Tieulent, R Ueno, H Ulmer, PE Urciuoli, GM Voutier, E Wijesooriya, K Wojtsekhowski, B AF Rvachev, MM Benmokhtar, F Penel-Nottaris, E Aniol, KA Bertozzi, W Boeglin, WU Butaru, F Calarco, JR Chai, Z Chang, CC Chen, JP Chudakov, E Cisbani, E Cochran, A Cornejo, J Dieterich, S Djawotho, P Duran, W Epstein, MB Finn, JM Fissum, KG Frahi-Amroun, A Frullani, S Furget, C Garibaldi, F Gayou, O Gilad, S Gilman, R Glashausser, C Hansen, JO Higinbotham, DW Hotta, A Hu, B Iodice, M Iomni, R de Jager, CW Jiang, X Jones, MK Kelly, JJ Kox, S Kuss, M Laget, JM De Leo, R LeRose, JJ Liatard, E Lindgren, R Liyanage, N Lourie, RW Malov, S Margaziotis, DJ Markowitz, P Merchez, F Michaels, R Mitchell, J Mougey, J Perdrisat, CF Punjabi, VA Quemener, G Ransome, RD Real, JS Roche, R Sabatie, F Saha, A Simon, D Strauch, S Suleiman, R Tamae, T Templon, JA Tieulent, R Ueno, H Ulmer, PE Urciuoli, GM Voutier, E Wijesooriya, K Wojtsekhowski, B CA Jefferson Lab Hall A Collaboration TI Quasielastic He-3(e,e(')p)H-2 reaction at Q(2)=1.5 GeV2 for recoil momenta up to 1 GeV/c SO PHYSICAL REVIEW LETTERS LA English DT Article ID HE-3(E,E'P); SCATTERING; KNOCKOUT; SYSTEMS; HE-3 AB We have studied the quasielastic He-3(e,e(')p)H-2 reaction in perpendicular coplanar kinematics, with the energy and the momentum transferred by the electron fixed at 840 MeV and 1502 MeV/c, respectively. The He-3(e,e(')p)H-2 cross section was measured for missing momenta up to 1000 MeV/c, while the A(TL) asymmetry was extracted for missing momenta up to 660 MeV/c. For missing momenta up to 150 MeV/c, the cross section is described by variational calculations using modern He-3 wave functions. For missing momenta from 150 to 750 MeV/c, strong final-state interaction effects are observed. Near 1000 MeV/c, the experimental cross section is more than an order of magnitude larger than predicted by available theories. The A(TL) asymmetry displays characteristic features of broken factorization with a structure that is similar to that generated by available models. C1 MIT, Cambridge, MA 02139 USA. Rutgers State Univ, Piscataway, NJ 08854 USA. Univ Sci & Technol, Bab Ezzouar 16111, Alger, Algeria. Lab Phys Subatom & Cosmol, F-38026 Grenoble, France. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Florida Int Univ, Miami, FL 33199 USA. Univ New Hampshire, Durham, NH 03824 USA. Univ Maryland, College Pk, MD 20742 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy. Ist Super Sanita, I-00161 Rome, Italy. Hampton Univ, Hampton, VA 23668 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Lund Univ, SE-22100 Lund, Sweden. Univ Massachusetts, Amherst, MA 01003 USA. CEA Saclay, F-91191 Gif Sur Yvette, France. Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy. Univ Bari, I-70126 Bari, Italy. Univ Virginia, Charlottesville, VA 22901 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Norfolk State Univ, Norfolk, VA 23504 USA. Florida State Univ, Tallahassee, FL 32306 USA. Old Dominion Univ, Norfolk, VA 23529 USA. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Georgia, Athens, GA 30602 USA. Yamagata Univ, Yamagata 9908560, Japan. Univ Illinois, Urbana, IL 61801 USA. RP Rvachev, MM (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. RI Kuss, Michael/H-8959-2012; Higinbotham, Douglas/J-9394-2014; Sabatie, Franck/K-9066-2015; Cisbani, Evaristo/C-9249-2011 OI Higinbotham, Douglas/0000-0003-2758-6526; Sabatie, Franck/0000-0001-7031-3975; Cisbani, Evaristo/0000-0002-6774-8473 NR 27 TC 23 Z9 23 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 20 PY 2005 VL 94 IS 19 AR 192302 DI 10.1103/PhysRevLett.94.192302 PG 5 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000012 PM 16090165 ER PT J AU Stamm, C Tudosa, I Siegmann, HC Stohr, J Dobin, AY Woltersdorf, G Heinrich, B Vaterlaus, A AF Stamm, C Tudosa, I Siegmann, HC Stohr, J Dobin, AY Woltersdorf, G Heinrich, B Vaterlaus, A TI Dissipation of spin angular momentum in magnetic switching SO PHYSICAL REVIEW LETTERS LA English DT Article ID FIELD; REVERSAL AB Applying one ultrashort magnetic field pulse, we observe up to 10 precessional switches of the magnetization direction in single crystalline Fe films of 10 and 15 atomic layers. We find that the rate at which angular momentum is dissipated in uniform large angle spin precession increases with time and film thickness, surpassing the intrinsic ferromagnetic resonance spin lattice relaxation of Fe by nearly an order of magnitude. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Seagate Technol LLC, Fremont, CA 94538 USA. Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada. Swiss Fed Inst Technol, Solid State Phys Lab, CH-8049 Zurich, Switzerland. RP Stamm, C (reprint author), BESSY, Albert Einstein Str 15, D-12489 Berlin, Germany. EM stohr@slac.stanford.edu RI Stamm, Christian/G-4814-2013; Woltersdorf, Georg/C-7431-2014 OI Stamm, Christian/0000-0001-5611-9084; Woltersdorf, Georg/0000-0001-9299-8880 NR 15 TC 16 Z9 16 U1 0 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 20 PY 2005 VL 94 IS 19 AR 197603 DI 10.1103/PhysRevLett.94.197603 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000059 PM 16090212 ER PT J AU Stone, NJ Stuchbery, AE Danchev, M Pavan, J Timlin, CL Baktash, C Barton, C Beene, J Benczer-Koller, N Bingham, CR Dupak, J Galindo-Uribarri, A Gross, CJ Kumbartzki, G Radford, DC Stone, JR Zamfir, NV AF Stone, NJ Stuchbery, AE Danchev, M Pavan, J Timlin, CL Baktash, C Barton, C Beene, J Benczer-Koller, N Bingham, CR Dupak, J Galindo-Uribarri, A Gross, CJ Kumbartzki, G Radford, DC Stone, JR Zamfir, NV TI First nuclear moment measurement with radioactive beams by the recoil-in-vacuum technique: The g factor of the 2(1)(+) state in Te-132 SO PHYSICAL REVIEW LETTERS LA English DT Article ID IONS AB Following Coulomb excitation of the radioactive ion beam (RIB) Te-132 at HRIBF we report the first use of the recoil-in-vacuum (RIV) method to determine the g factor of the 2(1)(+) state: g(973.9 keV 2(+) Te-132)=(+)0.35(5). The advantages offered by the RIV method in the context of RIBs and modern detector arrays are discussed. C1 Univ Oxford, Dept Phys, Oxford OX1 3PU, England. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. ANU, Dept Nucl Phys, Canberra, ACT 0200, Australia. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA. York Univ, Dept Phys, York YO12 5DD, N Yorkshire, England. Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. Acad Sci Czech Republ, Inst Sci Instruments, Brno 62464, Czech Republic. Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA. RP Stone, NJ (reprint author), Univ Oxford, Dept Phys, Oxford OX1 3PU, England. RI Zamfir, Nicolae Victor/F-2544-2011; Dupak, Jan/G-8823-2014; radford, David/A-3928-2015 NR 19 TC 46 Z9 46 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 20 PY 2005 VL 94 IS 19 AR 192501 DI 10.1103/PhysRevLett.94.192501 PG 4 WC Physics, Multidisciplinary SC Physics GA 928MX UT WOS:000229277000014 PM 16090167 ER PT J AU Ledieu, J Cox, EJ McGrath, R Richardson, NV Chen, Q Fournee, V Lograsso, TA Ross, AR Caspersen, KJ Unal, B Evans, JW Thiel, PA AF Ledieu, J Cox, EJ McGrath, R Richardson, NV Chen, Q Fournee, V Lograsso, TA Ross, AR Caspersen, KJ Unal, B Evans, JW Thiel, PA TI Step structure on the fivefold Al-Pd-Mn quasicrystal surface, and on related surfaces SO SURFACE SCIENCE LA English DT Article DE equilibrium thermodynamics and statistical mechanics; scanning tunneling microscopy (STM); step formation and bunching; alloys; stepped single crystal surfaces ID ENERGY-ELECTRON DIFFRACTION; ALPDMN; LEED; AL70PD21MN9; AL68PD23MN9; DYNAMICS; STM; TEMPERATURE; MICROSCOPY; AG(111) AB We compare step morphologies on surfaces of Al-rich metallic alloys, both quasicrystalline and crystalline. We present evidence that the large-scale step structure observed on Al-rich quasicrystals after quenching to room temperature reflects equilibrium structure at an elevated temperature. These steps are relatively rough, i.e., have high diffusivity, compared to those on crystalline surfaces. For the fivefold quasicrystal surface, step diffusivity increases as step height decreases, but this trend is not obeyed in a broader comparison between quasicrystals and crystals. On a shorter scale, the steps on Al-rich alloys tend to exhibit local facets (short linear segments), with different facet lengths, a feature which could develop during quenching to room temperature. Facets are shortest and most difficult to identify for the fivefold quasicrystal surface. (c) 2005 Elsevier B.V. All rights reserved. C1 Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Math, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England. Univ St Andrews, Sch Chem, St Andrews KY16 9ST, Fife, Scotland. RP Thiel, PA (reprint author), Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. EM thiel@ameslab.gov RI McGrath, Ronan/A-1568-2009; Ledieu, Julian/F-1430-2010 OI McGrath, Ronan/0000-0002-9880-5741; NR 44 TC 21 Z9 21 U1 1 U2 6 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 2005 VL 583 IS 1 BP 4 EP 15 DI 10.1016/j.susc.2005.02.012 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 930NS UT WOS:000229423500004 ER PT J AU Klippenstein, SJ Miller, JA AF Klippenstein, SJ Miller, JA TI The addition of hydrogen atoms to diacetylene and the heats of formation of i-C4H3 and n-C4H3 SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID 2-DIMENSIONAL MASTER EQUATION; PROPARGYL RADICALS; SOOT FORMATION; AB-INITIO; THERMOCHEMISTRY; ACETYLENE; PYROLYSIS; MECHANISM; FLAMES; C4H3 AB In this article, we discuss in detail the addition of hydrogen atoms to diacetylene and the reverse dissociation reactions, H + C4H2 &REVARR; i-C4H3 (R1) and H + C4H2 &REVARR; n-C4H3 (R2). The theory utilizes high-level electronic structure methodology to characterize the potential energy surface, Rice-Ramsperger-Kassel-Marcus (RRKM) theory to calculate microcanonical/J-resolved rate coefficients, and a two-dimensional master-equation approach to extract phenomenological (thermal) rate coefficients. Comparison is made with experimental results where they are available. The rate coefficients k(1)(T, p) and k(2)(T, p) are cast in forms that can be used in chemical kinetic modeling. In addition, we predict values of the heats of formation Of i-C4H3 and n-C4H3 and discuss their importance in flame chemistry. Our basis-set extrapolated, quadratic-configuration-interaction with single and double excitations (and triple excitations added perturbatively), QCISD(T), predictions of these heats of formation at 298 K are 130.8 kcal/mol for n-C4H3 and 119.3 kcal/mol for the i-isomer; multireference CI calculations with a nine-electron, nine-orbital, complete-active-space (CAS) reference wavefunction give just slightly larger values for these parameters. Our results are in good agreement with the recent focal-point analysis of Wheeler et al. (J. Chem. Phys. 2004, 121, 8800-8813), but they differ substantially for &UDelta; H-f(298)0(n-C4H3) with the earlier diffusion Monte Carlo predictions of Krokidis et al. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Klippenstein, SJ (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. OI Klippenstein, Stephen/0000-0001-6297-9187 NR 43 TC 40 Z9 40 U1 0 U2 17 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 19 PY 2005 VL 109 IS 19 BP 4285 EP 4295 DI 10.1021/jp058017x PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 926PE UT WOS:000229134300012 PM 16833758 ER PT J AU Li, X Kiran, B Wang, LS AF Li, X Kiran, B Wang, LS TI Gold as hydrogen. an experimental and theoretical study of the structures and bonding in disilicon gold clusters Si2Aun- and Si2Aun (n=2 and 4) and comparisons to Si2H2 and Si2H4 SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID TRANSITION-METAL CLUSTERS; MAIN-GROUP ELEMENTS; PHOTOELECTRON-SPECTROSCOPY; ELECTRONIC-STRUCTURE; BASIS-SETS; DENSITY; MOLECULES; ENERGIES; CHEMISTRY; ANALOGS AB In a previous communication, we showed that a single Au atom behaves like H in its bonding to Si in a series of Si-Au clusters, SiAun (n = 2-4) (Kiran et al. Angew. Chem., Int. Ed. 2004, 43, 2125). In this article, we show that the H analogy of Au is more general. We find that the chemical bonding and potential energy surfaces of two disilicon Au clusters, Si2Au2 and Si2Au4, are analogous to Si2H2 and Si2H4, respectively. Photoelectron spectroscopy and ab initio calculations are used to investigate the geometrical and electronic structures of Si2Au2-, Si2Au4-, and their neutral species. The most stable structures for both Si2Au2 and Si2Au2- are found to be C-2v, in which each Au bridges the two Si atoms. For Si2Au4-, two nearly degenerate dibridged structures in a cis (C-2h) and a trans (C-2v) configuration are found to be the most stable isomers. However, in the neural potential energy surface of Si2Au4, a monobridged isomer is the global minimum. The ground-state structures of Si2Au2- and Si2Au4- are confirmed by comparing the computed vertical detachment energies with the experimental data. The various stable isomers found for Si2Au2 and Si2Au4 are similar to those known for Si2H2 and Si2H4, respectively. Geometrical and electronic structure comparisons with the corresponding silicon hydrides are made to further establish the isolobal analogy between a gold atom and a hydrogen atom. C1 Washington State Univ, Dept Phys, Richland, WA 99352 USA. Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lan, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Wang, LS (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99352 USA. EM ls.wang@pnl.gov NR 56 TC 77 Z9 80 U1 1 U2 11 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 19 PY 2005 VL 109 IS 19 BP 4366 EP 4374 DI 10.1021/jp0512560 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 926PE UT WOS:000229134300021 PM 16833767 ER PT J AU Jayasundera, S Burleigh, MC Zeinali, M Spector, MS Miller, JB Yan, WF Dai, S Markowitz, MA AF Jayasundera, S Burleigh, MC Zeinali, M Spector, MS Miller, JB Yan, WF Dai, S Markowitz, MA TI Organosilica copolymers for the adsorption and separation of multiple pollutants SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Letter ID PERIODIC MESOPOROUS ORGANOSILICAS; CO-CONDENSATION; ORGANIC GROUPS; SILICA; SURFACTANT; FRAMEWORKS; TEMPLATES AB Benzene, diethylbenzene, and ethylenediamine-bridged bistrialkoxy precursors were used in the synthesis of multifunctional PMO copolymers for the adsorption of phenols and metal ions. Polyoxyethylene(10) stearyl ether (Brij 76) was used as the structure director with the surfactant template approach in the synthesis. The resulting PMO copolymers with two or more bridging groups have been characterized by nitrogen gas adsorption, powder X-ray diffraction, and C-13 and Si-29 solid-state NMR. These organosilicas exhibit large surface areas, narrow pore size distributions, large total pore volumes, and pore ordering consistent with well ordered, hexagonally packed p6mm structures. Minimal competitive effects were observed on the adsorption of p-chlorophenol to the copolymers in the presence of copper ions in solution. Similarly, the presence of p-chlorophenol in solution or adsorbed onto the copolymers did not interfere with copper adsorption. Replacement of a small portion of the benzene bridge in the 90: 10 BENZ:EDA copolymer with diethylbenzene produced a copolymer 2.5-fold more efficient for p-chlorophenol adsorption. ICP analysis revealed that greater than 98% of adsorbed copper was removed during extraction with HC1, and this extraction process can be repeated with no difference in copper adsorption after regeneration. C1 USN, Res Lab, Ctr Biomol Sci & Engn, Lab Mol Interfac Interact, Washington, DC 20375 USA. USN, Res Lab, Div Chem, Washington, DC 20375 USA. Off Naval Res, Phys Sci S&T Div, Arlington, VA 22217 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP USN, Res Lab, Ctr Biomol Sci & Engn, Lab Mol Interfac Interact, Code 6920, Washington, DC 20375 USA. EM mam@cbmse.nrl.navy.mil RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 18 TC 31 Z9 31 U1 2 U2 20 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 19 PY 2005 VL 109 IS 19 BP 9198 EP 9201 DI 10.1021/jp051435h PG 4 WC Chemistry, Physical SC Chemistry GA 926PB UT WOS:000229134000002 PM 16852097 ER PT J AU Matranga, C Bockrath, B AF Matranga, C Bockrath, B TI Controlled confinement and release of gases in single-walled carbon nanotube bundles SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID CONTAINING FUNCTIONAL-GROUPS; OZONE ADSORPTION; HIPCO PROCESS; TRAPPED CO2; PHASE; PURIFICATION; SPECTROSCOPY; OZONATION; SWNTS; XENON AB A simple procedure is described that locks small quantities of SF6, CO2, and (CO2)-C-13 into opened single-walled carbon nanotube (SWNT) bundles and keeps the gas in the SWNTs above the desorption temperature of these molecules. The technique involves opening the SWNTs with ozonolysis at 300 K followed by vacuum-annealing at 700 K. Gases are then cryogenically adsorbed into the opened SWNTs and locked into the SWNT pores by functionalizing the sample with a low-temperature ozone treatment. The low-temperature ozone treatment functionalizes the entry ports into the SWNT pores, which in turn create a physical barrier for gases trying to desorb through these functionalized ports. The samples are stable under vacuum for periods of at least 24 h, and the trapped gases can be released by vacuum-heating to 700 K. Reduced quantities of the trapped gases remain in the SWNTs even after exposure to room air. Fourier transform infrared spectroscopy is used to monitor the functionalities resulting from the ozone treatment and to detect the trapped gas species. C1 US Dept Enery, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Matranga, C (reprint author), US Dept Enery, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA. EM matranga@neti.doe.gov RI Matranga, Christopher/E-4741-2015 OI Matranga, Christopher/0000-0001-7082-5938 NR 36 TC 22 Z9 22 U1 1 U2 8 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 19 PY 2005 VL 109 IS 19 BP 9209 EP 9215 DI 10.1021/jp044307m PG 7 WC Chemistry, Physical SC Chemistry GA 926PB UT WOS:000229134000005 PM 16852100 ER PT J AU Chialvo, AA Kettler, M Nezbeda, I AF Chialvo, AA Kettler, M Nezbeda, I TI Effect of the range of interactions on the properties of fluids. 2. Structure and phase behavior of acetonitrile, hydrogen fluoride, and formic acid SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID MONTE-CARLO-SIMULATION; LIQUID ACETONITRILE; THERMODYNAMIC PROPERTIES; DIELECTRIC-CONSTANT; PRIMITIVE MODELS; VAPOR-LIQUID; WATER; FORCES; EQUILIBRIA; ENSEMBLE AB To complete the study on the effect of the long-range part of Coulombic interactions on properties of complex polar and associating fluids, we have investigated in detail three compounds with extreme features: acetonitrile for its unusually large dipole moment, hydrogen fluoride with very strong hydrogen bonding, and formic acid for its potential formation of different n-mers in liquid and gaseous phases. The effect of the long-range Coulombic interactions on both the structure and thermodynamics of the homogeneous phase, and on the vapor-liquid equilibria has been examined using the same decomposition of realistic potential models into a short-range part and a residual pan as in the previous paper [Kettler, M.; et al. J. Phys. Chem. B 2002, 106, 7537-7546]. The present results fully confirm the previous findings that the properties of polar and associating systems are determined primarily by the short-range interactions regardless of their nature, i.e., contributions arising from the long-range interactions constitute only a small portion of the total properties, and thus that the short-range potential counterpart of full realistic models can be used as a convenient reference for a successful perturbation expansion. C1 Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA. Univ Leipzig, Comp Simulat Grp, Inst Theoret Phys, D-7010 Leipzig, Germany. Acad Sci Czech Republ, E Hala Lab Thermodynam, CR-16502 Prague, Czech Republic. Purkyne Univ, Dept Phys, Usti Lab, Usti Lab 40096, Czech Republic. RP Chialvo, AA (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA. EM chialvoaa@ornl.gov RI Nezbeda, Ivo/F-6073-2014; OI Chialvo, Ariel/0000-0002-6091-4563 NR 39 TC 14 Z9 14 U1 0 U2 4 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 19 PY 2005 VL 109 IS 19 BP 9736 EP 9750 DI 10.1021/jp050922u PG 15 WC Chemistry, Physical SC Chemistry GA 926PB UT WOS:000229134000078 PM 16852173 ER PT J AU Somorjai, GA Levine, RD AF Somorjai, GA Levine, RD TI The changing landscape of physical chemistry at the beginning of the 21st century SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM somorjai@socrates.berkeley.edu NR 0 TC 1 Z9 1 U1 1 U2 1 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 19 PY 2005 VL 109 IS 19 BP 9853 EP 9854 DI 10.1021/jp040754q PG 2 WC Chemistry, Physical SC Chemistry GA 926PB UT WOS:000229134000093 PM 16852188 ER PT J AU Youngren, KK Coveney, D Peng, XN Bhattacharya, C Schmidt, LS Nickerson, ML Lamb, BT Deng, JM Behringer, RR Capel, B Rubin, EM Nadeau, JH Matin, A AF Youngren, KK Coveney, D Peng, XN Bhattacharya, C Schmidt, LS Nickerson, ML Lamb, BT Deng, JM Behringer, RR Capel, B Rubin, EM Nadeau, JH Matin, A TI The Ter mutation in the dead end gene causes germ cell loss and testicular germ cell tumours SO NATURE LA English DT Article ID RNA-BINDING PROTEIN; MESSENGER-RNA; STEM-CELLS; MOUSE CHROMOSOME-18; MICE; TERATOMAS; DEFICIENCY; CYCLOOXYGENASE-2; TRANSCRIPTION; EXPRESSION AB In mice, the Ter mutation causes primordial germ cell (PGC) loss in all genetic backgrounds(1). Ter is also a potent modifier of spontaneous testicular germ cell tumour (TGCT) susceptibility in the 129 family of inbred strains, and markedly increases TGCT incidence in 129-Ter/Termales(2-4). In 129-Ter/Ter mice, some of the remaining PGCs transform into undifferentiated pluripotent embryonal carcinoma cells(2-6), and after birth differentiate into various cells and tissues that compose TGCTs. Here, we report the positional cloning of Ter, revealing a point mutation that introduces a termination codon in the mouse orthologue (Dnd1) of the zebrafish dead end (dnd) gene. PGC deficiency is corrected both with bacterial artificial chromosomes that contain Dnd1 and with a Dnd1-encoding transgene. Dnd1 is expressed in fetal gonads during the critical period when TGCTs originate. DND1 has an RNA recognition motif and is most similar to the apobec complementation factor, a component of the cytidine to uridine RNA-editing complex. These results suggest that Ter may adversely affect essential aspects of RNA biology during PGC development. DND1 is the first protein known to have an RNA recognition motif directly implicated as a heritable cause of spontaneous tumorigenesis. TGCT development in the 129-Ter mouse strain models paediatric TGCT in humans. This work will have important implications for our understanding of the genetic control of TGCT pathogenesis and PGC biology. C1 Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, Houston, TX 77030 USA. Case Western Reserve Univ, Dept Genet, Cleveland, OH 44106 USA. Case Western Reserve Univ, Case Comprehens Canc Ctr, Cleveland, OH 44106 USA. Duke Univ, Dept Cell Biol, Durham, NC 27710 USA. SAIC Frederick Inc, Basic Res Program, Frederick, MD 21702 USA. NCI, Immunobiol Lab, Frederick, MD 21702 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Genome Sci Dept, Berkeley, CA 94720 USA. RP Nadeau, JH (reprint author), Univ Texas, MD Anderson Canc Ctr, Dept Mol Genet, Houston, TX 77030 USA. EM jhn4@case.edu; amatin@mdanderson.org FU NCI NIH HHS [P30 CA016672, R01 CA075056, R01 CA093754]; NHLBI NIH HHS [R01 HL063054] NR 30 TC 199 Z9 212 U1 1 U2 8 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 19 PY 2005 VL 435 IS 7040 BP 360 EP 364 DI 10.1038/nature03595 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 927HM UT WOS:000229185000048 PM 15902260 ER PT J AU Elekes, Z Dombradi, Z Kanungo, R Baba, H Fulop, Z Gibelin, J Horvath, A Ideguchi, E Ichikawa, Y Iwasa, N Iwasaki, H Kanno, S Kawai, S Kondo, Y Motobayashi, T Notani, M Ohnishi, T Ozawa, A Sakurai, H Shimoura, S Takeshita, E Takeuchi, S Tanihata, I Togano, Y Wu, C Yamaguchi, Y Yanagisawa, Y Yoshida, A Yoshida, K AF Elekes, Z Dombradi, Z Kanungo, R Baba, H Fulop, Z Gibelin, J Horvath, A Ideguchi, E Ichikawa, Y Iwasa, N Iwasaki, H Kanno, S Kawai, S Kondo, Y Motobayashi, T Notani, M Ohnishi, T Ozawa, A Sakurai, H Shimoura, S Takeshita, E Takeuchi, S Tanihata, I Togano, Y Wu, C Yamaguchi, Y Yanagisawa, Y Yoshida, A Yoshida, K TI Low-lying excited states in C-17,C-19 SO PHYSICS LETTERS B LA English DT Article ID CROSS-SECTIONS; HALO STRUCTURE; RELATIVISTIC ENERGIES; NEUTRON REMOVAL; CARBON ISOTOPES; C-19; NUCLEAR; MASS AB C-17,C-19 nuclei have been investigated by proton inelastic scattering on a liquid hydrogen target at intermediate energies. Two peaks were observed in the Doppler-corrected gamma-ray spectra with energies of 210(6), 331(6) keV in C-17 and 72(4), 197(6) keV in 19C corresponding to the decay of two excited states in both nuclei. Analyzing the reaction cross sections, tentative spin values were determined for the states. The experimental results are in reasonable agreement with the predictions by shell model calculations. (c) 2005 Elsevier B.V. All rights reserved. C1 Hungarian Acad Sci, Inst Nucl Res, H-4001 Debrecen, Hungary. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Rikkyo Univ, Tokyo 171, Japan. Inst Phys Nucl, F-91406 Orsay, France. Eotvos Lorand Univ, H-1117 Budapest, Hungary. Univ Tokyo, Tokyo 1130033, Japan. Tohoku Univ, Sendai, Miyagi 9808578, Japan. Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. Univ Tsukuba, Tsukuba, Ibaraki 3058571, Japan. Argonne Natl Lab, Argonne, IL 60439 USA. RP Elekes, Z (reprint author), Hungarian Acad Sci, Inst Nucl Res, POB 51, H-4001 Debrecen, Hungary. EM elekes@atomki.hu RI Fulop, Zsolt/B-2262-2008; Dombradi, Zsolt/B-3743-2012; Horvath, Akos/D-1056-2012; Shimoura, Susumu/E-8692-2012; Elekes, Zoltan/J-4531-2012; SAKURAI, HIROYOSHI/G-5085-2014; Takeuchi, Satoshi/O-1529-2016; OI Shimoura, Susumu/0000-0003-4741-2865; Elekes, Zoltan/0000-0003-0571-8719 NR 32 TC 55 Z9 55 U1 1 U2 1 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 19 PY 2005 VL 614 IS 3-4 BP 174 EP 180 DI 10.1016/j.physletb.2005.04.007 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 930KW UT WOS:000229415700007 ER PT J AU Baskaran, D Mays, JW Zhang, XP Bratcher, MS AF Baskaran, D Mays, JW Zhang, XP Bratcher, MS TI Carbon nanotubes with covalently linked porphyrin antennae: Photoinduced electron transfer SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID POLYMERIZATION; FULLERENE C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. USA, Res Lab, Weap & Mat Res Directorate,AMSRL, WM,MA, Aberdeen Proving Ground, MD 21005 USA. RP Baskaran, D (reprint author), Univ Tennessee, Dept Chem, 552 Buehler Hall, Knoxville, TN 37996 USA. EM baskaran@utk.edu RI Durairaj, Baskaran/C-3692-2009; Zhang, Peter/B-7976-2011 OI Durairaj, Baskaran/0000-0002-6886-5604; Zhang, Peter/0000-0001-7574-8409 NR 13 TC 239 Z9 244 U1 4 U2 33 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 18 PY 2005 VL 127 IS 19 BP 6916 EP 6917 DI 10.1021/ja0508222 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA 925WW UT WOS:000229085200002 PM 15884911 ER PT J AU Chenoweth, K Cheung, S van Duin, ACT Goddard, WA Kober, EM AF Chenoweth, K Cheung, S van Duin, ACT Goddard, WA Kober, EM TI Simulations on the thermal decomposition of a poly(dimethylsiloxane) polymer using the ReaxFF reactive force field SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID GENERALIZED GRADIENT APPROXIMATION; MOLECULAR-ORBITAL METHODS; BASIS SET; KINETIC ASPECTS; DEGRADATION; POLYDIMETHYLSILOXANE; ENERGY; POLYSILOXANES; DYNAMICS; EXCHANGE AB To investigate the failure of the poly(dimethylsiloxane) polymer (PDMS) at high temperatures and pressures and in the presence of various additives, we have expanded the ReaxFF reactive force field to describe carbon-silicon systems. From molecular dynamics (MD) simulations using ReaxFF we find initial thermal decomposition products of PDMS to be CH3 radical and the associated polymer radical, indicating that decomposition and subsequent cross-linking of the polymer is initiated by Si-C bond cleavage, in agreement with experimental observations. Secondary reactions involving these CH3 radicals lead primarily to formation of methane. We studied temperature and pressure dependence of PDMS decomposition by following the rate of production of methane in the ReaxFF MD simulations. We tracked the temperature dependency of the methane production to extract Arrhenius parameters for the failure modes of PDMS. Furthermore, we found that at increased pressures the rate of PDMS decomposition drops considerably, leading to the formation of fewer CH3 radicals and methane molecules. Finally, we studied the influence of various additives on PDMS stability. We found that the addition of water or a SiO2 slab has no direct effect on the short-term stability of PDMS, but addition of reactive species such as ozone leads to significantly lower PDMS decomposition temperature. The addition of nitrogen monoxide does not significantly alter the degradation temperature but does retard the initial production of methane and C-2 hydrocarbons until the nitrogen monoxide is depleted. These results, and their good agreement with available experimental data, demonstrate that ReaxFF provides a useful computational tool for studying the chemical stability of polymers. C1 CALTECH, Div Chem, Mat & Proc Simulat Ctr, Pasadena, CA USA. CALTECH, Div Chem Engn, Mat & Proc Simulat Ctr, Pasadena, CA USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Goddard, WA (reprint author), CALTECH, Div Chem, Mat & Proc Simulat Ctr, Pasadena, CA USA. EM wag@wag.caltech.edu NR 37 TC 162 Z9 169 U1 16 U2 122 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 18 PY 2005 VL 127 IS 19 BP 7192 EP 7202 DI 10.1021/ja050980t PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA 925WW UT WOS:000229085200053 PM 15884961 ER PT J AU Ruvarac-Bugarcic, IA Saponjic, ZV Zec, S Rajh, T Nedeljkovic, JM AF Ruvarac-Bugarcic, IA Saponjic, ZV Zec, S Rajh, T Nedeljkovic, JM TI Photocatalytic reduction of cadmium on TiO2-nanoparticles modified with amino acids SO CHEMICAL PHYSICS LETTERS LA English DT Article ID TITANIUM-DIOXIDE NANOPARTICLES; SURFACE MODIFICATION; CHARGE SEPARATION; TIO2; SEMICONDUCTOR; MECHANISM; COLLOIDS; REMOVAL; IONS AB The photocatalytic reduction of cadmium ions was investigated using TiO2 nanoparticles (45 &ANGS; in diameter) surface-modified with histidine (His) or alanine (Ala). The X-ray diffraction measurements indicated that illumination of suspension consisting of His- or Ala-modified TiO2 nanoparticles in the presence of cadmium ions under an anoxic atmosphere lead to the formation of metallic cadmium. The TiO2 Fermi level upon surface modification with His or Ala must be shifted towards negative potentials at least 400 mV in order to achieve efficient photoreduction of cadmium ions. The surface structure of His- or Ala-modified TiO2 nanoparticles was proposed based on the changes in the vibration spectrum of His or Ala after adsorption on TiO2 and after addition of cadmium ions. © 2005 Elsevier B.V. All rights reserved. C1 Vinca Inst Nucl Sci, YU-11001 Belgrade, Yugoslavia. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Nedeljkovic, JM (reprint author), Vinca Inst Nucl Sci, POB 522, YU-11001 Belgrade, Yugoslavia. EM jovned@vin.bg.ac.yu NR 21 TC 11 Z9 11 U1 0 U2 7 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 17 PY 2005 VL 407 IS 1-3 BP 110 EP 113 DI 10.1016/j.cplett.2005.03.058 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 925PX UT WOS:000229066200022 ER PT J AU O'Neill, H Greenbaum, E AF O'Neill, H Greenbaum, E TI Spectroscopy and photochemistry of spinach Photosystem I entrapped and stabilized in a hybrid organosilicate glass SO CHEMISTRY OF MATERIALS LA English DT Article ID PHOTOSYNTHETIC REACTION CENTERS; SOL-GEL GLASS; ELECTRON-TRANSFER; REDOX COFACTORS; SILICA-GELS; BACTERIORHODOPSIN; ENCAPSULATION; PROTEIN; PLASTOCYANIN; FORM AB Photosystem I (PSI) is part of the photosynthetic apparatus of higher plants and algae. It is one of the naturally occurring molecular photovoltaic structures whose primary function is to convert solar energy into chemical energy. The immobilization and stabilization of this large transmembrane protein complex in a solvent-limited and optically clear organosilicate glass are reported. This was achieved by a modification of the sol-gel process whereby in the first instance the methanol formed during the hydrolysis of the alkoxide precursor was removed before adding the enzyme preparation. In the second instance, glycerol was used as a nonsurfactant templating agent. It was present at a final concentration of 50% (v/v) after the solvent removal process was completed. In addition to stabilizing PSI, it may also play an important structural role, as its omission results in opaque and brittle glasses. The PSI complexes retained their activity during the immobilization procedure and after 96% (w/w) of the solvent in the sol-gel matrix was removed. The ability of the P700 reaction centers in entrapped PSI to undergo photochemical oxidation indicated that the intramolecular electron-transfer apparatus of the reaction centers was functional. In addition, it was demonstrated that their intermolecular electron-transfer function was also intact, as evidenced by PSI-mediated photodependent hydrogen production. The results demonstrate the validity of this novel approach for investigation of complex biological electron-transfer processes under normative conditions. C1 Univ Tennessee, Dept Biochem & Cellular & Mol Biol, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Greenbaum, E (reprint author), Univ Tennessee, Dept Biochem & Cellular & Mol Biol, Knoxville, TN 37996 USA. EM greenbaum@ornl.gov OI O'Neill, Hugh/0000-0003-2966-5527 NR 53 TC 20 Z9 20 U1 1 U2 12 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 17 PY 2005 VL 17 IS 10 BP 2654 EP 2661 DI 10.1021/cm047763w PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 926QV UT WOS:000229138600024 ER PT J AU Krishnan, S Hennet, L Jahn, S Key, TA Madden, PA Saboungi, ML Price, DL AF Krishnan, S Hennet, L Jahn, S Key, TA Madden, PA Saboungi, ML Price, DL TI Structure of normal and supercooled liquid aluminum oxide SO CHEMISTRY OF MATERIALS LA English DT Article ID SPECTRAL ABSORPTION-COEFFICIENT; MOLECULAR-DYNAMICS; SCATTERING; DIFFRACTION; DENSITY AB We have made a new determination of the structure of liquid aluminum oxide over a wide temperature range, including the supercooled region, using synchrotron X-ray diffraction. Measurements were performed over a wide scattering vector range, 0.5-16 angstrom(-1). Specimens of aluminum oxide were aerodynamically levitated and laser-heated to temperatures in excess of the melting temperature of 2327 K. Diffraction measurements were performed in a temperature range of 2000-2600 K, which included the supercooled liquid state. Measurements performed in argon (reducing) and oxygen (oxidizing) atmospheres show little structural difference, in contrast to reported differences in optical properties. The X-ray results are in excellent agreement with those of a molecular dynamics simulation performed with an A initio interaction potential. C1 KLA Tencor, San Jose, CA 95134 USA. Ctr Rech Mat Haute Temp, F-45071 Orleans, France. Geoforschungszentrum Potsdam, D-14473 Potsdam, Germany. Containerless Res Inc, Evanston, IL 60201 USA. Univ Edinburgh, Dept Chem, Edinburgh EH9 3JJ, Midlothian, Scotland. Ctr Rech Mat Div, F-45071 Orleans, France. RP Price, DL (reprint author), Oak Ridge Natl Lab, Ctr Neuron Res, Oak Ridge, TN 37831 USA. RI HENNET, Louis/C-1711-2008; Jahn, Sandro/J-2889-2012; Saboungi, Marie-Louise/C-5920-2013 OI HENNET, Louis/0000-0002-2992-4800; Jahn, Sandro/0000-0002-2137-8833; Saboungi, Marie-Louise/0000-0002-0607-4815 NR 28 TC 19 Z9 19 U1 0 U2 6 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 17 PY 2005 VL 17 IS 10 BP 2662 EP 2666 DI 10.1021/cm050254p PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 926QV UT WOS:000229138600025 ER PT J AU Majzoub, EH Herberg, JL Stumpf, R Spangler, S Maxwell, RS AF Majzoub, EH Herberg, JL Stumpf, R Spangler, S Maxwell, RS TI XRD and NMR investigation of Ti-compound formation in solution-doping of sodium aluminum hydrides: solubility of Ti in NaAlH4 crystals grown in THF SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE hydrogen storage materials; mechanical alloying; X-ray diffraction; neutron diffraction; structural modeling; Rietveld refinement; nuclear magnetic resonance ID HYDROGEN STORAGE PROPERTIES; DOPED NAALH4; TITANIUM; PRECURSORS; ALANATES; STATE AB Sodium aluminum hydrides have gained attention due to their high hydrogen weight percent (5.5% ideal) compared to interstitial hydrides, and as a model for hydrides with even higher hydrogen weight fraction. The purpose of this paper is to investigate the Ti-compounds that are formed under solution-doping techniques, such as wet doping in solvents such as tetrahydrofuran (THF). Compound formation in Ti-doped sodium aluminum hydrides is investigated using X-ray diffraction (XRD) and magic angle spinning (MAS) nuclear magnetic resonance (NMR). We present lattice parameter measurements of crushed single crystals, which were exposed to Ti during growth. Rietveld refinements indicate no lattice parameter change and thus no solubility for Ti in NaAlH4 by this method of exposure. In addition, X-ray diffraction data indicate that no Ti substitutes in NaH, the final decomposition product for the alanate. Reaction products of completely reacted (33.3 at .%doped) samples that were solvent-mixed or mechanically milled are investigated. Formation of TiAl3 is observed in mechanically milled materials, but not solution mixed samples, where bonding to THF likely stabilizes Ti-based nano-clusters. The Ti in these clusters is activated by mechanical milling. (c) 2004 Elsevier B.V. All rights reserved. C1 Sandia Natl Labs, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Majzoub, EH (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA. EM ehmajzo@sandia.gov NR 14 TC 49 Z9 51 U1 0 U2 6 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 17 PY 2005 VL 394 IS 1-2 BP 265 EP 270 DI 10.1016/j.jallcom.2004.10.056 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 926YJ UT WOS:000229159300051 ER PT J AU Garetz, BA Newstein, MC Wilbur, JD Patel, AJ Durkee, DA Segalman, RA Liddle, JA Balsara, NP AF Garetz, BA Newstein, MC Wilbur, JD Patel, AJ Durkee, DA Segalman, RA Liddle, JA Balsara, NP TI Grain structure in block copolymer thin films studied by guided wave depolarized light scattering SO MACROMOLECULES LA English DT Article ID DISORDER TRANSITION; ELECTRON-MICROSCOPY; POLYMER SURFACES; GRATING COUPLERS; BIREFRINGENCE; GROWTH; MICRODOMAINS; MORPHOLOGY; ARRAYS; MEDIA AB A new optical technique for characterizing the grain structure of ordered block copolymer thin films has been developed. The technique, which we refer to as guided wave depolarized light scattering (GWDLS), is an adaptation of previous work wherein polarized light was used to characterize the grain structure in bulk block copolymer samples [Newstein et al. Macromolecules 1998, 31, 64]. Spin-casting and vacuum-annealing were used to prepare thin films of an ordered poly(a-methylstyrene-block-isoprene) copolymer on a flat, fused silica substrate. The ordered phase consisted of poly((x-methylstyrene) cylinders in a polyisoprene matrix. A plane-polarized laser beam was coupled into and out of a transverse magnetic (TM) mode of the film, which acts as a planar waveguide. The angle of incidence is adjusted to optimize the coupling efficiency into a particular mode of the waveguide. The path length traveled by the guided wave between the input and output coupling points was approximately I cm. The polarization of some of the incident light changes due to encounters with randomly oriented, optically anisotropic grains. This results in the coupling of light into propagating transverse electric (TE) modes in the sample. We show that the TE beam intensity of annealed samples with well-developed grain structure is significantly larger than that obtained from unannealed samples with poorly developed grain structure. The GWDLS results are consistent with atomic force microscopy results obtained from the annealed and unannealed films. C1 Polytech Univ, Othmer Dept Chem & Biol Sci & Engn, Brooklyn, NY 11201 USA. Polytech Univ, Dept Elect Engn, Brooklyn, NY 11201 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Garetz, BA (reprint author), Polytech Univ, Othmer Dept Chem & Biol Sci & Engn, 6 Metrotech Ctr, Brooklyn, NY 11201 USA. RI Liddle, James/A-4867-2013; OI Liddle, James/0000-0002-2508-7910; Segalman, Rachel/0000-0002-4292-5103 NR 43 TC 5 Z9 5 U1 0 U2 6 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 17 PY 2005 VL 38 IS 10 BP 4282 EP 4288 DI 10.1021/ma047859b PG 7 WC Polymer Science SC Polymer Science GA 926DS UT WOS:000229103700034 ER PT J AU Grobis, M Wachowiak, A Yamachika, R Crommie, MF AF Grobis, M Wachowiak, A Yamachika, R Crommie, MF TI Tuning negative differential resistance in a molecular film SO APPLIED PHYSICS LETTERS LA English DT Article ID ATOMIC-SCALE; SPECTROSCOPY; SURFACES; AU(111); DEVICE AB We have observed variable negative differential resistance (NDR) in scanning tunneling spectroscopy measurements of a double layer of C-60 molecules on a metallic surface. Minimum to maximum current ratios in the NDR region are tuned by changing the tunneling barrier width. The multilayer geometry is critical, as NDR is not observed when tunneling into a C-60 monolayer. Using a simple model, we show that the observed NDR behavior is explained by voltage-dependent changes in the tunneling barrier height. (c) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Grobis, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM crommie@berkeley.edu NR 21 TC 50 Z9 51 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 16 PY 2005 VL 86 IS 20 AR 204102 DI 10.1063/1.1931822 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000101 ER PT J AU Lee, JH Kim, CH Kim, YS Ho, KM Constant, K Leung, W Oh, CH AF Lee, JH Kim, CH Kim, YS Ho, KM Constant, K Leung, W Oh, CH TI Diffracted moire fringes as analysis and alignment tools for multilayer fabrication in soft lithography SO APPLIED PHYSICS LETTERS LA English DT Article ID SYSTEM AB We studied the first-order diffracted moire fringes of transparent multilayered structures comprised of irregularly deformed periodic patterns. By a comparison study of the diffracted moire fringe pattern and detailed microscopy of the structure, we show that the diffracted moire fringe can be used as a nondestructive tool to analyze the alignment of multilayered structures. We demonstrate the alignment method for the case of layer-by-layer microstructures using soft lithography. The alignment method yields high contrast of fringes even when the materials being aligned have very weak contrasts. The imaging method of diffracted moire fringes is a versatile visual tool for the microfabrication of transparent deformable microstructures in layer-by-layer fashion. (c) 2005 American Institute of Physics. C1 Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Microelect Res Ctr, Ames, IA 50011 USA. Hanyang Univ, Dept Phys, Seoul 133791, South Korea. RP Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. EM kmh@ameslab.gov RI Constant, Kristen/C-3673-2014 OI Constant, Kristen/0000-0001-7138-9365 NR 13 TC 12 Z9 12 U1 1 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 16 PY 2005 VL 86 IS 20 AR 204101 DI 10.1063/1.1927268 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000100 ER PT J AU Prasankumar, RP Scopatz, A Hilton, DJ Taylor, AJ Averitt, RD Zide, JM Gossard, AC AF Prasankumar, RP Scopatz, A Hilton, DJ Taylor, AJ Averitt, RD Zide, JM Gossard, AC TI Carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs measured by optical-pump terahertz-probe spectroscopy SO APPLIED PHYSICS LETTERS LA English DT Article ID TIME-DOMAIN SPECTROSCOPY; SILICON-ON-SAPPHIRE; RELAXATION; GROWTH AB We use optical-pump terahertz (THz)-probe spectroscopy to study carrier dynamics in self-assembled ErAs nanoislands embedded in GaAs and deposited in a superlattice structure. Measurements are performed at several pump fluences on samples with different superlattice periods, enabling a determination of the time-dependent conductivity. Subpicosecond carrier capture times are obtained, indicating the potential of these devices as time-domain THz detectors with performance comparable to low-temperature grown GaAs and superior control of material parameters. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. RP Prasankumar, RP (reprint author), Los Alamos Natl Lab, MST 10, Los Alamos, NM 87545 USA. EM rpprasan@lanl.gov RI Hilton, David/E-4929-2010; Zide, Joshua/B-5105-2010 OI Zide, Joshua/0000-0002-6378-7221 NR 18 TC 40 Z9 40 U1 1 U2 11 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 16 PY 2005 VL 86 IS 20 AR 201107 DI 10.1063/1.1923174 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000007 ER PT J AU Thranhardt, A Kuznetsova, I Schlichenmaier, C Koch, SW Shterengas, L Belenky, G Yeh, JY Mawst, LJ Tansu, N Hader, J Moloney, JV Chow, WW AF Thranhardt, A Kuznetsova, I Schlichenmaier, C Koch, SW Shterengas, L Belenky, G Yeh, JY Mawst, LJ Tansu, N Hader, J Moloney, JV Chow, WW TI Nitrogen incorporation effects on gain properties of GaInNAs lasers: Experiment and theory SO APPLIED PHYSICS LETTERS LA English DT Article ID LINEWIDTH ENHANCEMENT FACTOR; QUANTUM-WELL LASERS; OPTICAL GAIN; 1.3-MU-M; PERFORMANCE; SIMULATION; SPECTRA AB Gain properties of GaInNAs lasers with different nitrogen concentrations in the quantum wells are investigated experimentally and theoretically. Whereas nitrogen incorporation induces appreciable modifications in the spectral extension and the carrier density dependence of the gain, it is found that the linewidth enhancement factor is reduced by inclusion of nitrogen, but basically unaffected by different nitrogen content due to the balancing between gain and index changes. (c) 2005 American Institute of Physics. C1 Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany. SUNY Stony Brook, New York, NY 11974 USA. Univ Wisconsin, Madison, WI 53706 USA. Lehigh Univ, Ctr Opt Technol, Bethlehem, PA 18015 USA. Univ Arizona, Arizona Ctr Math Sci, Tucson, AZ 85721 USA. Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Thranhardt, A (reprint author), Univ Marburg, Fachbereich Phys, Renthof 5, D-35032 Marburg, Germany. EM angela.thraenhardt@physik.uni-marburg.de RI Tansu, Nelson/A-2309-2008; Thranhardt, Angela/A-5888-2013 OI Tansu, Nelson/0000-0002-3811-9125; NR 24 TC 35 Z9 35 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 16 PY 2005 VL 86 IS 20 AR 201117 DI 10.1063/1.1929880 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000017 ER PT J AU Xu, T Zach, MP Xiao, ZL Rosenmann, D Welp, U Kwok, WK Crabtree, GW AF Xu, T Zach, MP Xiao, ZL Rosenmann, D Welp, U Kwok, WK Crabtree, GW TI Self-assembled monolayer-enhanced hydrogen sensing with ultrathin palladium films SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRICAL-CONDUCTION; ABSORPTION; SENSORS; RESISTANCE; NANOTUBES; CLUSTERS; SYSTEMS; PD AB Resistive-type palladium structures for hydrogen sensing remains as a research focus for their simplicity in device construction. We demonstrate that a siloxane self-assembled monolayer placed between a substrate and an evaporated ultrathin Pd film promotes the formation of small Pd nanoclusters and reduces the stiction between the palladium and the substrate. The resulting Pd nanocluster film can detect 2% H-2 with a rapid response time of similar to 70 ms and is sensitive to 25 ppm hydrogen, detectable by a 2% increase in conductance due to the hydrogen-induced palladium lattice expansion. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. RP Xu, T (reprint author), Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. EM xu@anl.gov NR 22 TC 115 Z9 116 U1 3 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 16 PY 2005 VL 86 IS 20 AR 203104 DI 10.1063/1.1929075 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000076 ER PT J AU Yuan, GD Ye, ZZ Zhu, LP Qian, Q Zhao, BH Fan, RX Perkins, CL Zhang, SB AF Yuan, GD Ye, ZZ Zhu, LP Qian, Q Zhao, BH Fan, RX Perkins, CL Zhang, SB TI Control of conduction type in Al- and N-codoped ZnO thin films SO APPLIED PHYSICS LETTERS LA English DT Article ID P-TYPE ZNO; CHEMICAL-VAPOR-DEPOSITION; ELECTRICAL-PROPERTIES; ROOM-TEMPERATURE; NITROGEN AB p-type ZnO thin films have been fabricated by an Al- and N-codoping technique at the growth temperature between 380 and 480 degrees C, as identified by the Hall measurement. At lower and higher temperatures, however, the samples are n type. The best p-type sample shows a resistivity and hole concentration of 24.5 Omega cm and 7.48x10(17) cm(-3) at room temperature, respectively. Spread resistance depth profile further shows the transition from n-type substrate to p-type ZnO through a clearly defined depletion region. Photoluminescence spectra also show low signal in deep level transition, indicating a low density of native defects. (c) 2005 American Institute of Physics. C1 Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China. EM yezz@zju.edu.cn RI Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013; yuan, guodong/B-6314-2015 OI Zhang, Shengbai/0000-0003-0833-5860; yuan, guodong/0000-0001-9627-0934 NR 20 TC 68 Z9 75 U1 1 U2 26 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 16 PY 2005 VL 86 IS 20 AR 202106 DI 10.1063/1.1928318 PG 3 WC Physics, Applied SC Physics GA 930EG UT WOS:000229398000044 ER PT J AU Gardner, SN Wagner, MC AF Gardner, SN Wagner, MC TI Software for optimization of SNP and PCR-RFLP genotyping to discriminate many genomes with the fewest assays SO BMC GENOMICS LA English DT Article ID SPECIES IDENTIFICATION; MICROBIAL FORENSICS AB Background: Microbial forensics is important in tracking the source of a pathogen, whether the disease is a naturally occurring outbreak or part of a criminal investigation. Results: A method and SPR Opt ( SNP and PCR-RFLP Optimization) software to perform a comprehensive, whole-genome analysis to forensically discriminate multiple sequences is presented. Tools for the optimization of forensic typing using Single Nucleotide Polymorphism (SNP) and PCR-Restriction Fragment Length Polymorphism (PCR-RFLP) analyses across multiple isolate sequences of a species are described. The PCR-RFLP analysis includes prediction and selection of optimal primers and restriction enzymes to enable maximum isolate discrimination based on sequence information. SPR Opt calculates all SNP or PCR-RFLP variations present in the sequences, groups them into haplotypes according to their co-segregation across those sequences, and performs combinatoric analyses to determine which sets of haplotypes provide maximal discrimination among all the input sequences. Those set combinations requiring that membership in the fewest haplotypes be queried (i.e. the fewest assays be performed) are found. These analyses highlight variable regions based on existing sequence data. These markers may be heterogeneous among unsequenced isolates as well, and thus may be useful for characterizing the relationships among unsequenced as well as sequenced isolates. The predictions are multi-locus. Analyses of mumps and SARS viruses are summarized. Phylogenetic trees created based on SNPs, PCR-RFLPs, and full genomes are compared for SARS virus, illustrating that purported phylogenies based only on SNP or PCR-RFLP variations do not match those based on multiple sequence alignment of the full genomes. Conclusion: This is the first software to optimize the selection of forensic markers to maximize information gained from the fewest assays, accepting whole or partial genome sequence data as input. As more sequence data becomes available for multiple strains and isolates of a species, automated, computational approaches such as those described here will be essential to make sense of large amounts of information, and to guide and optimize efforts in the laboratory. The software and source code for SPR Opt is publicly available and free for non-profit use at http://www. llnl.gov/ IPandC/technology/software/softwaretitles/spropt.php. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Gardner, SN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM gardner26@llnl.gov; wagner5@llnl.gov NR 14 TC 8 Z9 8 U1 0 U2 4 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1471-2164 J9 BMC GENOMICS JI BMC Genomics PD MAY 16 PY 2005 VL 6 AR 73 DI 10.1186/1471-2164-6-73 PG 17 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA 937HF UT WOS:000229914500001 PM 15904493 ER PT J AU Horita, J Matthews, A AF Horita, J Matthews, A TI Introduction to "In search of isotope biosignatures" SO CHEMICAL GEOLOGY LA English DT Editorial Material ID RELATIVE ABUNDANCE; CARBON ISOTOPES C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel. RP Horita, J (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM horitaj@omi.gov NR 5 TC 0 Z9 0 U1 0 U2 1 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 16 PY 2005 VL 218 IS 1-2 BP 1 EP 2 DI 10.1016/j.chemgeo.2005.01.015 PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 933TD UT WOS:000229654900001 ER PT J AU Horita, J AF Horita, J TI Some perspectives on isotope biosignatures for early life SO CHEMICAL GEOLOGY LA English DT Article; Proceedings Paper CT Conference on In Search of Isotope Biosignatures CY SEP 07-12, 2003 CL Kurashiki, JAPAN DE isotopes; biosignatures; organic compounds; graphite; Archean ID FISCHER-TROPSCH SYNTHESIS; ISUA SUPRACRUSTAL BELT; MID-ATLANTIC RIDGE; THERMAL-DECOMPOSITION; RELATIVE ABUNDANCE; CARBON ISOTOPES; WEST GREENLAND; AMINO-ACIDS; HYDROCARBONS; HYDROGEN AB The idea of using stable isotope compositions of light elements, particularly of carbon, as a sign of biological activities (biosignatures), both present and past, dates back to the dawn of stable isotope geochemistry in the 1940s. In the wake of the discovery of large variations in (13)C/(12)C ratios among various carbon-bearing materials including plants and fossil fuels, the contentious debate ensued between Kalervo Rankama and Harmon Craig in the early 1950s whether the origin of graphitic carbon in ancient rocks (biogenic vs. abiogenic) can be uniquely identified by its isotopic compositions. During the last half-century, great progress has been made in understanding biogeochemical processes in modem and ancient terrestrial environments. Rapid developments in the last decade of novel analytical techniques and the birth of new geoscience fields such as geomicrobiology and astrobiology has prompted resurgence in the application not only of conventional light stable isotopes, but also of those of metal and other intermediate elements. However, recent debates on the origin of graphitic carbons from Early Archean rocks from Australia and Greenland are very much reminiscent of the Rankama-Craig debate half a century ago. Here, an attempt is made to review briefly the history of isotope biosignatures and to critically assess current criteria for early life. A number of possible abiotic pathways exist that lead to the synthesis of various organic and reduced carbon compounds (alkanes, PAH, amino acids, lipids, graphitic carbon, etc.) depleted in 13 C due to large kinetic isotope effects (up to ca. - 60 parts per thousand). It also seems very likely that the mantle contains indigenous carbons (graphite, diamond, dissolved carbons, carbide) with low delta(13)C values (-20 parts per thousand to -30 parts per thousand), which have previously been considered recycled sedimentary organic carbons or surface contamination. This analysis prompts us to reassess our current and future strategies for identifying early and extraterrestrial life using isotope biosignatures. (c) 2005 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Horita, J (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM horitaj@ornl.gov NR 100 TC 37 Z9 38 U1 3 U2 30 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 16 PY 2005 VL 218 IS 1-2 BP 171 EP 186 DI 10.1016/j.chemgeo.2005.01.017 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 933TD UT WOS:000229654900013 ER PT J AU Hua, H Ruscic, B Wang, BS AF Hua, H Ruscic, B Wang, BS TI Theoretical calculations on the reaction of ethylene with oxygen SO CHEMICAL PHYSICS LA English DT Article DE ethylene; oxidation; reaction mechanism; initiation of combustion; quantum chemistry calculation ID HIGH-TEMPERATURE; INITIATION; MECHANISM AB The triplet potential energy surface for the reaction of ethylene with molecular oxygen in the ground state has been calculated at the QCISD(T, full)/6-311 ++ G(3df,2p)//MP2(full)/6-311 G(d,p) level of theory. Four intermediates and 17 transition states are located along the minimum energy reaction path. Six major radical product channels are revealed, namely, C(2)H(3) + HO(2), O(3(P)) + C(2)H(4)O, H + C(2)H(3), OH + C(2)H(3)O, OH + CH(3)CO, and O((3)p) + CH(3)CHO. In view of reaction barrier heights, the dominant channels are predicted to be C(2)H(3) + HO(2), O((3)p) + C(2)H(4)O, H + C(2)H(3)O(2), and C(2)H(4)O(2)((3)A ''). The calculated rate constants for the abstraction reaction path are in good agreement with the available experimental data. The implication of the current results in the initiation of the combustion of ethylene is discussed. (c) 2004 Elsevier B.V. All rights reserved. C1 Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China. Argonne Natl Lab, Div Chem, Argonne, IL USA. RP Wang, BS (reprint author), Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China. EM wangb@chem.whu.edu.cn RI Ruscic, Branko/A-8716-2008 OI Ruscic, Branko/0000-0002-4372-6990 NR 21 TC 12 Z9 12 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD MAY 16 PY 2005 VL 311 IS 3 BP 335 EP 341 DI 10.1016/j.chemphys.2004.11.012 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 909NX UT WOS:000227867700009 ER PT J AU Yang, J Sykora, M Meyer, TJ AF Yang, J Sykora, M Meyer, TJ TI Electropolymerization of vinylbipyridine complexes of ruthenium(II) and osmium(II) in SiO2 sol-gel films SO INORGANIC CHEMISTRY LA English DT Article ID POLYPYRIDYL COMPLEXES; ELECTRON-TRANSFER; CHARGE-TRANSFER; ELECTROGENERATED CHEMILUMINESCENCE; ENERGY-TRANSFER; EXCITED-STATES; REDOX POLYMER; RIGID MEDIA; THIN-FILMS; GLASS AB PF6- salts of the complexes [Ru(vbpy)(3)](2+) and [Os(vbpy)(3)](2+) (vbpy = 4-methyl-4'-vinyl-2,2'-bipyridine) have been electropolymerized into the pores Of SiO2 sol-gel films deposited on conductive Tin(IV)-doped indium oxide-coated glass slides (ITO, In2O3:Sn). The resulting transparent composites represent a new class of materials of general formulas ITO/SG-poly-[Ru(vbpy)(3)](PF6)(2) and ITO/SG-poly-[Os(vbpy)(3)](PF6)(2). The composites are stable with respect to loss of complexes to the external solution and demonstrate several interesting phenomena: (1) Sol-gel pores, serving as diffusion channels for the vbpy complexes and counterions, play a key role in the formation of the polymer and dictate the electrochemical properties of the resulting composite. (2) Dynamic polymer growth occurs within individual diffusion channels creating parallel structures of filled and unfilled channels. (3) Unidirectional charge transfer and a "bilayer" effect have been shown to operate in ITO/SG-poly-[Ru(vbpy)(3)](PF6)(2) films exposed to [Os(vbpy)(3)](PF6)(2) in the external solution. (4) Photophysical properties of the metal-to-ligand charge transfer (MLCT) excited states in ITO/SG-poly-[Ru(vbpy)(3)](PF6)(2) composites are significantly modified compared to electropolymerized films on ITO or model monomeric complexes in solution. C1 Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA. Los Alamos Natl Lab, CPCS, Los Alamos, NM 87545 USA. RP Meyer, TJ (reprint author), Univ N Carolina, Dept Chem, CB 3290, Chapel Hill, NC 27599 USA. EM tjmeyer@lanl.gov NR 50 TC 10 Z9 10 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 16 PY 2005 VL 44 IS 10 BP 3396 EP 3404 DI 10.1021/ic048623r PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 926MJ UT WOS:000229127000009 PM 15877419 ER PT J AU Huynh, MHV Meyer, TJ Jameson, DL AF Huynh, MHV Meyer, TJ Jameson, DL TI Iminic N-bound iminophosphorano versus nitrilic N-bound iminophosphorano Os(IV) complexes: A new double derivatization of the nitrido ligand SO INORGANIC CHEMISTRY LA English DT Article ID SOLID-PHASE SYNTHESIS; PHOSPHORUS YLIDES; BUILDING-BLOCKS; II COMPLEXES; COORDINATION; REACTIVITY; DERIVATIVES; NITROGEN; ANALOGS AB The reactions between trans-[Os-IV(tpy)(Cl)(2)(NCN)] (1) and PPh3 and between trans-[Os-IV(tpy)(Cl)(2)(NPPh3)](+) (2) and CN- provide new examples of double derivatization of the nitrido ligand in an Os(V])-nitrido complex (Os-VI&EQUIV; N). The nitrilic N-bound product from the first reaction, trans-[Os-II(tpy)(Cl)(2)(NCNPPh3)] (3), is the coordination isomer of the first iminic N-bound product from the second reaction, trans-[Os-II(tpy)(Cl)(2)(N(CN)(PPh3))] (4). In CH3CN at 45 &DEG; C, 4 undergoes isomerrization to 3 followed by solvolysis and release of (N-cyano)iminophosphorane, NCNPPh3. These reactions demonstrate new double derivatization reactions of the nitrido ligand in Os-VI&EQUIV; N with its implied synthetic utility. C1 Los Alamos Natl Lab, Associate Director Strateg Res, MS A127, Los Alamos, NM 87545 USA. Gettysburg Coll, Dept Chem, Gettysburg, PA 17325 USA. RP Huynh, MHV (reprint author), Los Alamos Natl Lab, Mat Dynam Grp, Dynam Experimentat Div, DX2, Los Alamos, NM 87545 USA. EM huynh@lanl.gov; tjmeyer@lanl.gov NR 36 TC 9 Z9 9 U1 0 U2 4 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 16 PY 2005 VL 44 IS 10 BP 3657 EP 3663 DI 10.1021/ic050203u PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 926MJ UT WOS:000229127000039 PM 15877449 ER PT J AU Li, M Ellern, A Espenson, JH AF Li, M Ellern, A Espenson, JH TI Rhenium(V) complexes with thiolato and dithiolato ligands: Synthesis, structures, and monomerization reactions SO INORGANIC CHEMISTRY LA English DT Article ID OXYGEN-ATOM TRANSFER; RAY CRYSTAL-STRUCTURES; MOLECULAR-STRUCTURE; STEREOCHEMICAL CONSEQUENCES; SPECTROSCOPIC PROPERTIES; OXORHENIUM(V) COMPLEXES; MONODENTATE LIGANDS; ANTI ISOMERS; CHEMISTRY; KINETICS AB The new compound {(PhS)(2)ReO(μ-SPh)}(2), 1, was synthesized from Re2O7 and PhSH and then used as the synthon for a number of hitherto unknown oxorhenium(V) compounds. Reactions between dithiols and 1 (2:1 ratio) afford {PhSReO(dt)}(2), where the dithiols, dtH(2), are 1,2-ethanedithiol (edtH(2)), 1,3-propanedithiol (pdtH(2)), 1,3-butanedithiol (pdtMeH(2)), 1,2-benzenedithiol (bdtH(2)), 2-(mercaptomethyl)thiophenol (mtpH(2)), and 2-mercaptoethyl sulfide (mesH(2)). Similar reactions carried out with a 3:1 ratio of dtH(2) to 1 afford [(ReO)(2)(dt)(3)], dt = edt, pdt. When NEt3 was introduced prior to the 3:1 reaction between edtH(2) and 1, a compound containing an anionic complex was isolated, [PPh4][ReO(edt)(2)]. The new compounds were characterized analytically, spectroscopically, and crystallographically. The Re-O groups in two of the compounds, 1 and {ReO(μ-SPh)(bdt)}(2), exist in rare anti orientations; the others adopt the more familiar syn geometry, as discussed. Selected monomerization reactions of {PhSReO(dt)}(2) were also carried out: {PhSReO(dt)}(2) + 2L = 2[PhSReO(dt)L]. The rate for L = 4-phenylpyridine is given by v = {k(a)[L] + k(b)[L](2)} x [{PhSReO(dt)}(2)], as it is for the reactions of {MeReO(dt)}(2); for all of these compounds, the reaction proceeds nearly entirely by the third-order pathway. Values of k(b)/L-2 mol(-2) s(-1) at 25.0 &DEG; C are 5.8 x 10(2) (mtp), 2.97 x 10(3) (pdt), 4.62 x 10(5) (edt), and 3.87 x 10(5) (bdt). The rate law for the reactions of {PhSReO(dt)}(2) with L = PAr3 is v = k(a)[L]/{1 + κ[L]} x [{PhSReO(dt)}(2)]. For PPh3, values at 25.0 &DEG; C of k(a)/L mol(-1) s(-1) (κ/L mol(-1)) for {PhSReO(dt)}(2) are 9.64 x 10(-2) (1.87) for mtp, 3.43 x 10(-2) (0.492) for pdt, 1.91 (1.42) for edt, 1.84 x 10(-2) (0.82) for bdt, and 1.14 x 10(3) (10.6) for 1. Mechanisms are proposed that are consistent with the data obtained and with earlier work. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Espenson, JH (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM espenson@iastate.edu NR 64 TC 12 Z9 12 U1 0 U2 5 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 16 PY 2005 VL 44 IS 10 BP 3690 EP 3699 DI 10.1021/ic0501871 PG 10 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 926MJ UT WOS:000229127000043 PM 15877453 ER PT J AU Lin, HH Faunce, DE Stacey, M Terajewicz, A Nakamura, T Zhang-Hoover, J Kerley, M Mucenski, ML Gordon, S Stein-Streilein, J AF Lin, HH Faunce, DE Stacey, M Terajewicz, A Nakamura, T Zhang-Hoover, J Kerley, M Mucenski, ML Gordon, S Stein-Streilein, J TI The macrophage F4/80 receptor is required for the induction of antigen-specific efferent regulatory T cells in peripheral tolerance SO JOURNAL OF EXPERIMENTAL MEDICINE LA English DT Article ID IMMUNE DEVIATION ACAID; ACTIVATED MOUSE MACROPHAGES; GROWTH-FACTOR-BETA; ANTERIOR-CHAMBER; DENDRITIC CELLS; PRIVILEGED SITE; ORAL TOLERANCE; MANNOSE RECEPTOR; CELLULAR LIGAND; EGF-TM7 FAMILY AB We show that the mouse macrophage-restricted F4/80 protein is not required for the development and distribution of tissue macrophages but is involved in the generation of antigen-specific efferent regulatory T (T reg) cells that suppress antigen-specific immunity. In the in vivo anterior chamber (a.c.)-associated immune deviation (ACAID) model of peripheral tolerance, a.c. inoculation of antigen into F4/80(-)/(-) mice was unable to induce efferent T reg cells and suppress delayed-type hypersensitivity (DTH) responses. Moreover, the use of anti-F4/80 mAb and F4/80(-)/(-) APCs in an in vitro ACAID model showed that all APC cells in the culture must be able to express F4/80 protein if efferent T reg cells were to be generated. In a low-dose oral tolerance model, WT but not F4/80(-)/(-) mice generated an efferent CD8(+) T reg cell population that suppressed an antigen-specific DTH response. Peripheral tolerance was restored in F4/80(-)/(-) mice by adoptive transfer of F4/80(+) APCs in both peripheral tolerance models, indicating a central role for the F4/80 molecule in the generation of efferent CD8(+) T reg cells. C1 Harvard Univ, Sch Med, Schepens Eye Res Inst, Boston, MA 02114 USA. Univ Oxford, Sir William Dunn Sch Pathol, Oxford OX1 3RE, England. NEI, Training Program Mol Bases Eye Dis, Bethesda, MD 20892 USA. Chang Gung Univ, Dept Microbiol & Immunol, Taoyuan 333, Taiwan. Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. Childrens Hosp, Div Pulm Biol, Cincinnati, OH 45229 USA. Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Med,Pulm & Crit Care Div, Boston, MA 02115 USA. RP Gordon, S (reprint author), Harvard Univ, Sch Med, Schepens Eye Res Inst, Boston, MA 02114 USA. EM christine.holt@path.ox.ac.uk; jstein@vision.eri.harvard.edu FU NEI NIH HHS [EY 11983, EY 13066, R01 EY011983, R01 EY013066]; Wellcome Trust NR 56 TC 170 Z9 177 U1 2 U2 19 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 USA SN 0022-1007 J9 J EXP MED JI J. Exp. Med. PD MAY 16 PY 2005 VL 201 IS 10 BP 1615 EP 1625 DI 10.1084/jem.20042307 PG 11 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA 931HJ UT WOS:000229476100009 PM 15883173 ER PT J AU Sohler, D Palacz, M Dombradi, Z Hjorth-Jensen, M Fahlander, C Norlin, LO Nyberg, J Back, T Lagergren, K Rudolph, D Algora, A Andreoiu, C de Angelis, G Atac, A Bazzacco, D Cederkall, J Cederwall, B Fant, B Farnea, E Gadea, A Gorska, M Grawe, H Hashimito-Saitoh, N Johnson, A Kerek, A Klamra, W Kownacki, J Lenzi, SM Likar, A Lipoglavsek, M Moszynski, M Napoli, DR Rossi-Alvarez, C Roth, HA Saitoh, T Seweryniak, D Skeppstedt, O Timar, J Weisflog, M Wolinska, M AF Sohler, D Palacz, M Dombradi, Z Hjorth-Jensen, M Fahlander, C Norlin, LO Nyberg, J Back, T Lagergren, K Rudolph, D Algora, A Andreoiu, C de Angelis, G Atac, A Bazzacco, D Cederkall, J Cederwall, B Fant, B Farnea, E Gadea, A Gorska, M Grawe, H Hashimito-Saitoh, N Johnson, A Kerek, A Klamra, W Kownacki, J Lenzi, SM Likar, A Lipoglavsek, M Moszynski, M Napoli, DR Rossi-Alvarez, C Roth, HA Saitoh, T Seweryniak, D Skeppstedt, O Timar, J Weisflog, M Wolinska, M TI Maximally aligned states in the proton drip line nucleus Sb-106 SO NUCLEAR PHYSICS A LA English DT Article DE nuclear reactions Fe-54(Ni-58,np alpha), E=240 MeV measured E gamma; I gamma, gamma gamma-, (charged particle)gamma-,(neutron)gamma-coin, gamma-ray polarization; Sb-106 deduced high-spin levels, J, pi, configurations; Euroball, ISIS arrays ID GAMMA-RAY SPECTROSCOPY; COINCIDENCE DATA SETS; GE DETECTORS; BAND; CLOVER; CS-113; TESTS AB High-spin states in Sb-106 have been investigated in the Fe-54(Ni-58, 1α 1p1n) reaction by in-beam γ-spectroscopic methods using the EUROBALL detector array equipped with charged particle and neutron detectors. On the basis of measured γγ-coincidence relations, angular distributions, and linear polarization ratios a significantly extended level scheme has been constructed up to spin and parity I-π = (19(-)) and E-x &SIM; 6.5 MeV. The experimental results are interpreted within the framework of the gdsh shell model using a realistic effective nucleon-nucleon interaction. Candidates for states with fully aligned angular momenta in the π(d(5/2), g(7/2))(1) v (d(5/2), g(7/2))(5) valence space are identified at 4338 and 5203 keV, as well as in the π(d(5/2), g(7/2))(1) V(d(5/2), g(7/2))(4)h(11/2)(1) space at 6087, 6573 and 6783 keV. © 2005 Elsevier B.V. All rights reserved. C1 Inst Nucl Res, H-4001 Debrecen, Hungary. Univ Warsaw, Heavy Ion Lab, Warsaw, Poland. Univ Oslo, Dept Phys, Oslo, Norway. Univ Oslo, Ctr Math Appl, Oslo, Norway. Lund Univ, Dept Phys, Lund, Sweden. Royal Inst Technol, Stockholm, Sweden. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Svedberg Lab, S-75121 Uppsala, Sweden. Ist Nazl Fis Nucl, Lab Nazl Legnaro, Padua, Italy. Uppsala Univ, Dept Radiat Sci, Uppsala, Sweden. Ist Nazl Fis Nucl, Sezione Padova, Padua, Italy. Ist Nazl Fis Nucl, Dipartimento Fis, Padua, Italy. Univ Helsinki, Dept Phys, Helsinki, Finland. Univ Valencia, Valencia, Spain. GSI Darmstadt, D-6100 Darmstadt, Germany. Jozef Stefan Inst, Ljubljana, Slovenia. Soltan Inst Nucl Studies, Otwock, Poland. Chalmers Univ Technol, S-41296 Gothenburg, Sweden. Argonne Natl Lab, Chicago, IL USA. Uppsala Univ, Dept Neutron Res, Uppsala, Sweden. RP Sohler, D (reprint author), Inst Nucl Res, H-4001 Debrecen, Hungary. EM sohler@atomki.hu RI Rudolph, Dirk/D-4259-2009; Hjorth-Jensen, Morten/B-1417-2008; Dombradi, Zsolt/B-3743-2012; Palacz, Marcin/H-3713-2012; Lenzi, Silvia/I-6750-2012; Cederwall, Bo/M-3337-2014; Gadea, Andres/L-8529-2014; Algora, Alejandro/E-2960-2015; Napoli, Daniel R./D-9863-2012; OI Rudolph, Dirk/0000-0003-1199-3055; Cederwall, Bo/0000-0003-1771-2656; Gadea, Andres/0000-0002-4233-1970; Algora, Alejandro/0000-0002-5199-1794; Napoli, Daniel R./0000-0002-8154-6958; Back, Torbjorn/0000-0003-1996-0805 NR 32 TC 2 Z9 2 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAY 16 PY 2005 VL 753 IS 3-4 BP 251 EP 262 DI 10.1016/j.nuclphysa.2005.02.153 PG 12 WC Physics, Nuclear SC Physics GA 923XR UT WOS:000228943400001 ER PT J AU Kharzeev, D Tuchin, K AF Kharzeev, D Tuchin, K TI From color glass condensate to quark-gluon plasma through the event horizon SO NUCLEAR PHYSICS A LA English DT Article ID HEAVY-ION COLLISIONS; WEIZSACKER-WILLIAMS FIELD; CENTRAL RAPIDITY REGION; HIGH-DENSITY QCD; PARTICLE-PRODUCTION; NUCLEAR COLLISIONS; HADRON-PRODUCTION; BLACK-HOLES; ACCELERATED OBSERVER; TRANSVERSE-MOMENTUM AB We propose a new thermalization scenario for heavy ion collisions which at sufficiently high energies implies the phase transition to the quark-gluon plasma. The key ingredient of our approach is the Hawking-Unruh effect: an observer moving with an acceleration a experiences the influence of a thermal bath with an effective temperature T = alpha/2 pi, similar to the one present in the vicinity of a black hole horizon. For electric charges moving in external electromagnetic fields of realistic strength, the resulting temperature appears too small to be detected. However for partons in strong color fields the effect should be observable: in the color glass condensate picture, the strength of the color-electric field is E similar to Q(s/2)(g) (Q(s) is the saturation scale, and g is the strong coupling), the typical acceleration is a similar to Qs, and the heat bath temperature is T = Qs /2 pi similar to 200 MeV. In nuclear collisions at sufficiently high energies the effect can induce a rapid thermalization over the time period of tau similar or equal to 2 pi/Q(s) similar or equal to 1 fm accompanied by phase transitions. We consider a specific example of chiral symmetry restoration induced by a rapid deceleration of the colliding nuclei. We argue that parton saturation in the initial nuclear wave functions is a necessary precondition for the formation of quark-gluon plasma. We discuss the implications of our "black hole thermalization" scenario for various observables in relativistic heavy ion collisions. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Phys, Nucl Theory Grp, Upton, NY 11973 USA. RP Tuchin, K (reprint author), Brookhaven Natl Lab, Dept Phys, Nucl Theory Grp, Upton, NY 11973 USA. EM tuchin@quark.phy.bnl.gov NR 90 TC 91 Z9 91 U1 0 U2 3 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 16 PY 2005 VL 753 IS 3-4 BP 316 EP 334 DI 10.1016/j.nuclphysa.2005.03.001 PG 19 WC Physics, Nuclear SC Physics GA 923XR UT WOS:000228943400005 ER PT J AU Wagh, AS Natarajan, R McDaniel, RL Patil, S AF Wagh, AS Natarajan, R McDaniel, RL Patil, S TI Ceramicrete blends produce strong, low-permeability cements for arctic use SO OIL & GAS JOURNAL LA English DT Article C1 Univ Alaska, Fairbanks, AK 99701 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Patil, S (reprint author), Univ Alaska, Fairbanks, AK 99701 USA. EM ffslp@uaf.edu OI Wagh, Arun/0000-0002-8678-7574 NR 10 TC 0 Z9 0 U1 0 U2 1 PU PENNWELL PUBL CO ENERGY GROUP PI TULSA PA 1421 S SHERIDAN RD PO BOX 1260, TULSA, OK 74112 USA SN 0030-1388 J9 OIL GAS J JI Oil Gas J. PD MAY 16 PY 2005 VL 103 IS 19 BP 48 EP 52 PG 5 WC Energy & Fuels; Engineering, Petroleum SC Energy & Fuels; Engineering GA 928TE UT WOS:000229293800020 ER PT J AU Gilbert, Y Bachelot, R Vial, A Lerondel, G Royer, P Bouhelier, A Wiederrecht, GP AF Gilbert, Y Bachelot, R Vial, A Lerondel, G Royer, P Bouhelier, A Wiederrecht, GP TI Photoresponsive polymers for topographic simulation of the optical near-field of a nanometer sized gold tip in a highly focused laser beam SO OPTICS EXPRESS LA English DT Article ID MICROSCOPE AB The local perturbation of a diffraction-limited spot by a nanometer sized gold tip in a popular apertureless scanning near-field optical microscopy (ASNOM) configuration is reproduced through topography changes in a photoresponsive polymer. Our method relies on the observation of the photochemical migration of azobenzene molecules grafted to a polymer placed beneath the tip. A local molecular displacement has been shown to be activated by a gold tip as a consequence of the lateral surface charge density present at the edges of the tip's end, resulting from a strong near-field depolarization predicted by theory. (C) 2005 Optical Society of America. C1 Univ Technol Troyes, CNRS, FRE 2671, Lab Nanotechnol & Instrumentat Opt, F-10010 Troyes, France. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. RP Gilbert, Y (reprint author), Univ Technol Troyes, CNRS, FRE 2671, Lab Nanotechnol & Instrumentat Opt, 12 Rue Marie Curie,BP 2060, F-10010 Troyes, France. EM yann.gilbert@utt.fr; renaud.bachelot@utt.fr; bouhelier@anl.gov; wiederrecht@anl.gov RI Bouhelier, Alexandre/A-1960-2010; Lerondel, Gilles/D-1559-2011; Vial, Alexandre/I-7894-2012; Bachelot, Renaud/M-6888-2015 OI Vial, Alexandre/0000-0002-7701-0413; NR 18 TC 16 Z9 16 U1 0 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1094-4087 J9 OPT EXPRESS JI Opt. Express PD MAY 16 PY 2005 VL 13 IS 10 BP 3619 EP 3624 DI 10.1364/OPEX.13.003619 PG 6 WC Optics SC Optics GA 926RS UT WOS:000229140900004 PM 19495267 ER PT J AU Tseng, SH Kim, YL Taflove, A Maitland, D Backman, V Walsh, JT AF Tseng, SH Kim, YL Taflove, A Maitland, D Backman, V Walsh, JT TI Simulation of enhanced backscattering of light by numerically solving Maxwell's equations without heuristic approximations SO OPTICS EXPRESS LA English DT Article ID MACROSCOPIC RANDOM MEDIUM; COHERENT BACKSCATTERING; MULTIPLE-SCATTERING; OPTICAL INTERACTIONS; PSTD ALGORITHM; MEDIA AB We report what we believe to be the first simulation of enhanced backscattering (EBS) of light by numerically solving Maxwell's equations without heuristic approximations. Our simulation employs the pseudospectral time-domain (PSTD) technique, which we have previously shown enables essentially exact numerical solutions of Maxwell's equations for light scattering by millimeter-volume random media consisting of micrometer-scale inhomogeneities. We show calculations of EBS peaks of random media in the presence of speckle; in addition, we demonstrate speckle reduction using a frequency-averaging technique. More generally, this new technique is sufficiently robust to permit the study of EBS phenomena for random media of arbitrary geometry not amenable to simulation by other approaches, especially with regard to extension to full-vector electrodynamics in three dimensions. (C) 2005 Optical Society of America. C1 Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA. Northwestern Univ, Dept Biomed Engn, Evanston, IL 60208 USA. Lawrence Livermore Natl Lab, Med Phys & Biophys Div, Livermore, CA 94550 USA. RP Tseng, SH (reprint author), Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA. RI Backman, Vadim/B-6689-2009; Taflove, Allen/B-7275-2009; Walsh, Joseph/B-7636-2009; OI TSENG, SNOW-HONG/0000-0003-1743-801X NR 19 TC 18 Z9 18 U1 0 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1094-4087 J9 OPT EXPRESS JI Opt. Express PD MAY 16 PY 2005 VL 13 IS 10 BP 3666 EP 3672 DI 10.1364/OPEX.13.003666 PG 7 WC Optics SC Optics GA 926RS UT WOS:000229140900010 PM 19495273 ER PT J AU Lindor, NM Bristow, J AF Lindor, NM Bristow, J TI Tenascin-X deficiency in autosomal recessive Ehlers-Danlos syndrome SO AMERICAN JOURNAL OF MEDICAL GENETICS PART A LA English DT Article DE Ehlers-Danlos syndrome; tenascin-X; diverticular disease; mitral valve; obstructive airway disease; cutis laxa AB We present two unrelated individuals with complete deficiency of tenascin-X, resulting in an autosomal recessive form of Ehlers-Danlos syndrome (EDS). Consistent with the original description of tenascin-X deficiency, these individuals had marked skin hyperextensibility, easy bruising, and joint laxity. Unlike classical EDS they did not have atrophic scarring or poor wound healing. Significant medical problems occurring in these individuals included severe diverticular intestinal disease, mitral valve prolapse requiring valve replacement, and obstructive airway disease. (c) 2005 Wiley-Liss, Inc. C1 Mayo Clin, Dept Med Genet, Coll Med, Rochester, MN 55905 USA. Univ Calif San Francisco, Dept Pediat, San Francisco, CA 94143 USA. Lawrence Berkeley Lab, Dept Genome Sci, Berkeley, CA USA. RP Lindor, NM (reprint author), Mayo Clin, Dept Med Genet, Coll Med, 200 1st St SW, Rochester, MN 55905 USA. EM nlindor@mayo.edu NR 7 TC 25 Z9 25 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1552-4825 J9 AM J MED GENET A JI Am. J. Med. Genet. A PD MAY 15 PY 2005 VL 135A IS 1 BP 75 EP 80 DI 10.1002/ajmg.a.30671 PG 6 WC Genetics & Heredity SC Genetics & Heredity GA 921JA UT WOS:000228759200015 PM 15793839 ER PT J AU Sharp, JS Guo, JT Uchiki, T Xu, Y Dealwis, C Hettich, RL AF Sharp, JS Guo, JT Uchiki, T Xu, Y Dealwis, C Hettich, RL TI Photochemical surface mapping of C14S-Sml1p for constrained computational modeling of protein structure SO ANALYTICAL BIOCHEMISTRY LA English DT Article DE protein structure; mass spectrometry; photochemical surface mapping; de novo computational modeling; Sml1p protein; solvent accessibility ID REDUCTASE INHIBITOR SML1; HYDROXYL RADICAL PROBE; X-RAY RADIOLYSIS; MASS-SPECTROMETRY; RIBONUCLEOTIDE REDUCTASE; CHECKPOINT GENES; YEAST; REORGANIZATION; PREDICTION; OXIDATION AB Photochemically generated hydroxyl radicals were used to map solvent-exposed regions in the C14S mutant of the protein Sm11p, a regulator of the ribonuclease reductase enzyme Rnr1p in Saccharomyces cerevisiae. By using high-performance mass spectrometry to characterize the oxidized peptides created by the hydroxyl radical reactions, amino acid solvent-accessibility data for native and denatured C14S Sm11p that revealed a solvent-excluding tertiary structure in the native state were obtained. The data oil solvent accessibilities of various amino acids within the protein were then utilized to evaluate the de novo computational models generated by the HMMSTR/Rosetta server. The top five models initially generated by the server all disagreed with both published nuclear magnetic resonance (NMR) data and the solvent-accessibility data obtained in this study. A structural model adjusted to fit the previously reported NMR data satisfied most of the solvent-accessibility constraints. Through minor adjustment of the rotamers of two amino acid side chains for this latter structure, a model that not only provided a lower energy conformation but also completely satisfied previously reported data from NMR and tryptophan fluorescence measurements, in addition to the solvent-accessibility data presented here, was generated. Published by Elsevier Inc. C1 Univ Tennessee, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37830 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA. Univ Tennessee, Biochem & Cellular Mol Biochem Dept, Knoxville, TN 37996 USA. RP Hettich, RL (reprint author), Univ Tennessee, Grad Sch Genome Sci & Technol, 1060 Commerce Pk, Oak Ridge, TN 37830 USA. EM hettichrl@ornl.gov RI Hettich, Robert/N-1458-2016 OI Hettich, Robert/0000-0001-7708-786X NR 46 TC 31 Z9 31 U1 0 U2 4 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD MAY 15 PY 2005 VL 340 IS 2 BP 201 EP 212 DI 10.1016/j.ab.2005.02.005 PG 12 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 921QH UT WOS:000228779000003 PM 15840492 ER PT J AU Pan, C Hettich, RL AF Pan, C Hettich, RL TI Multipole-storage-assisted dissociation for the characterization of large proteins and simple protein mixtures by ESI-FTICR-MS SO ANALYTICAL CHEMISTRY LA English DT Article ID INFRARED MULTIPHOTON DISSOCIATION; COLLISIONALLY ACTIVATED DISSOCIATION; RESOLUTION MASS-SPECTROMETRY; EXTERNAL ION RESERVOIR; QUADRUPOLE-TIME; SEQUENCE TAGS; CHARGED IONS; TOP-DOWN; IDENTIFICATION; ACCUMULATION AB In Fourier transform ion cyclotron resonance mass spectrometry, collisionally activated dissociation (CAD) typically is accomplished within the analyzer ion cell. An alternative approach of multipole-storage-assisted dissociation (MSAD) has previously been demonstrated by inducing collisional fragmentation in the external multipole that is usually employed for ion accumulation. To explore the utility of MSAD for interrogating intact proteins and simple protein mixtures in a multiplexed manner, we have investigated the means of controlling the collisional energy and the fragmentation pattern for this experimental approach. With protein samples in the low micromolar concentration range, the two major experimental parameters affecting MSAD in the hexapole region were found to be the dc offset voltage and accumulation time. While low-energy MSAD of intact proteins yields fragment ions similar to sustained off resonance irradiation collision-activated dissociation (SORI-CAD), high-energy MSAD induces sequential fragmentation for intact proteins to yield a rich variety of singly charged ions in the m/z 6001200 Da region. Each of the seven proteins (M-r range of 8.5-116 kDa) examined in this study exhibited their own characteristic MSAD fragmentation pattern, which could be used as a signature of the presence of a given protein, even in a mixture. In addition, any MSAD fragment can be isolated and dissociated further by SORI-CAD in an MS3-type experiment inside the FTICR analyzer cell. This presents a novel way to interrogate the identities of these fragment ions as well as obtain amino acid sequence tag information that can be used to identify proteins from mixtures. C1 Univ Tennessee, Oak Ridge Natl Lab, Genome Sci & Technol Grad Sch, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Hettich, RL (reprint author), Univ Tennessee, Oak Ridge Natl Lab, Genome Sci & Technol Grad Sch, POB 2008,MS 6131, Oak Ridge, TN 37831 USA. EM hettichrl@ornl.gov RI Pan, Chongle/C-6960-2008; Hettich, Robert/N-1458-2016 OI Hettich, Robert/0000-0001-7708-786X NR 29 TC 8 Z9 8 U1 1 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 15 PY 2005 VL 77 IS 10 BP 3072 EP 3082 DI 10.1021/ac048297x PG 11 WC Chemistry, Analytical SC Chemistry GA 927PS UT WOS:000229206800007 PM 15889895 ER PT J AU Shen, YF Zhang, R Moore, RJ Kim, J Metz, TO Hixson, KK Zhao, R Livesay, EA Udseth, HR Smith, RD AF Shen, YF Zhang, R Moore, RJ Kim, J Metz, TO Hixson, KK Zhao, R Livesay, EA Udseth, HR Smith, RD TI Automated 20 kpsi RPLC-MS and MS/MS with chromatographic peak capacities of 1000-1500 and capabilities in proteomics and metabolomics SO ANALYTICAL CHEMISTRY LA English DT Article ID CAPILLARY LIQUID-CHROMATOGRAPHY; TANDEM MASS-SPECTROMETRY; PROTEIN IDENTIFICATION TECHNOLOGY; HUMAN PLASMA PROTEOME; THEORETICAL LIMIT; YEAST PROTEOME; ONLINE; IONIZATION; PARTICLES; COLUMNS AB Proteomics analysis based-on reversed-phase liquid chromatography (RPLC) is widely practiced; however, variations providing cutting-edge RPLC performance have generally not been adopted even though their benefits are well established. Here, we describe an automated format 20 kpsi RPLC system for proteomics and metabolomics that includes on-line coupling of micro-solid phase extraction for sample loading and allows electrospray ionization emitters to be readily replaced. The system uses 50 mu m i.d. x 40-200 cm fused-silica capillaries packed with 1.4-3-mu m porous C18-bonded silica particles to obtain chromatographic peak capacities of 1000-1500 for complex peptide and metabolite mixtures. This separation quality provided high-confidence identifications of > 12 000 different tryptic peptides from > 2000 distinct Shewanella oneidensis proteins (similar to 40% of the proteins predicted for the S. oneidensis proteome) in a single 12-h ion trap tandem mass spectrometry (MS/MS) analysis. The protein identification reproducibility approached 90% between replicate experiments. The average protein MS/MS identification rate exceeded 10 proteins/min, and 1207 proteins were identified in 120 min through assignment of 5944 different peptides. The proteomic analysis dynamic range of the 20 kpsi RPLC-ion trap MS/MS was approximately 10(6) based on analyses of a human blood plasma sample, for which 835 distinct proteins were identified with high confidence in a single 12-h run. A single run of the 20 kpsi RPLC-accurate mass MS detected > 5000 different compounds from a metabolomics sample. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. RI Kim, Jeongkwon/C-6230-2012; Smith, Richard/J-3664-2012; OI Kim, Jeongkwon/0000-0002-0087-1151; Smith, Richard/0000-0002-2381-2349; Metz, Tom/0000-0001-6049-3968 FU NCRR NIH HHS [RR 018522] NR 36 TC 184 Z9 186 U1 4 U2 46 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 2005 VL 77 IS 10 BP 3090 EP 3100 DI 10.1021/ac0483062 PG 11 WC Chemistry, Analytical SC Chemistry GA 927PS UT WOS:000229206800009 PM 15889897 ER PT J AU Li, HW Park, HY Porter, MD Yeung, ES AF Li, HW Park, HY Porter, MD Yeung, ES TI Single DNA molecules as probes of chromatographic surfaces SO ANALYTICAL CHEMISTRY LA English DT Article ID SELF-ASSEMBLED MONOLAYERS; HYDROPHILIC-INTERACTION CHROMATOGRAPHY; CARBOXYLIC ANHYDRIDE GROUPS; ATOMIC-FORCE MICROSCOPY; POLAR COMPOUNDS; CAPILLARY-ELECTROPHORESIS; FLUORESCENCE MICROSCOPY; LIQUID/SOLID INTERFACES; CRYSTAL MICROBALANCE; INDIVIDUAL MOLECULES AB YOYO-I-labeled lambda-DNA was employed as a nanoprobe for different functionalized surfaces to elucidate adsorption in chromatography. While the negatively charged backbone is not adsorbed, the 12-base unpaired ends of this DNA provide exposed purine and pyrimidine groups for adsorption. Self-assembled monolayers (SAMs) formed on gold substrate provide a wide range of choices of surface with well-defined and well-organized functional groups. Patterns of amino-terminated, carboxylic acid-terminated, and hydroxyl-terminated SAMs are generated by lithography. Patterns of metal oxides are generated spontaneously after deposition of metals. By recording the real-time dynamic motion of DNA molecules at the SAMs/aqueous interface, one can study the various parameters governing the retentivity of an analyte during chromatographic separation. Even subtle differences among adsorptive forces can be revealed. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Yeung, ES (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. EM yeung@ameslab.gov NR 67 TC 18 Z9 18 U1 0 U2 13 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 2005 VL 77 IS 10 BP 3256 EP 3260 DI 10.1021/ac048143h PG 5 WC Chemistry, Analytical SC Chemistry GA 927PS UT WOS:000229206800028 PM 15889916 ER PT J AU Srivastava, A Pitesky, ME Steele, PT Tobias, HJ Fergenson, DP Horn, JM Russell, SC Czerwieniec, GA Lebrilla, CS Gard, EE Frank, M AF Srivastava, A Pitesky, ME Steele, PT Tobias, HJ Fergenson, DP Horn, JM Russell, SC Czerwieniec, GA Lebrilla, CS Gard, EE Frank, M TI Comprehensive assignment of mass spectral signatures from individual Bacillus atrophaeus spores in matrix-free laser desorption/ionization bioaerosol mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID SINGLE AEROSOL-PARTICLES; BACTERIAL-SPORES; DIPICOLINIC ACID; AMINO ACIDS; GERMINATION; SPECTROSCOPY; SPORULATION; CLASSIFICATION; MICROORGANISMS; IONIZATION AB We have fully characterized the mass spectral signatures of individual Bacillus atrophaeus spores obtained using matrix-free laser desorption/ionization bioaerosol mass spectrometry (BAMS). Mass spectra of spores grown in unlabeled, C-13-labeled, and N-15-labeled growth media were used to determine the number of carbon and nitrogen atoms associated with each mass peak observed in mass spectra from positive and negative ions. To determine the parent ion structure associated with fragment ion peaks, the fragmentation patterns of several chemical standards were independently determined. Our results confirm prior assignments of dipicolinic acid, amino acids, and calcium complex ions made in the spore mass spectra. The identities of several previously unidentified mass peaks, key to the recognition of Bacillus spores by BAMS, have also been revealed. Specifically, a set of fragment peaks in the negative polarity is shown to be consistent with the fragmentation pattern of purine nucleobase-containing compounds. The identity of m/z = +74, a marker peak that helps discriminate B. atrophaeus from Bacillus thuringiensis spores grown in rich media is [N1C4H12](+). A probable precursor molecule for the [N1C4H12](+) ion observed in spore spectra is trimethylglycine (N+(CH3)(3)CH2COOH), which produces a m/z = +74 peak when ionized in the presence of dipicolinic acid. A clear assignment of all the mass peaks in the spectra from bacterial spores, as presented in this work, establishes their relationship to the spore chemical composition and facilitates the evaluation of the robustness of "marker" peaks. This is especially relevant for peaks that have been used to discriminate Bacillus spore species, B. thuringiensis and B. atrophaeus, in our previous studies. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. RP Frank, M (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM frank1@llnl.gov RI Frank, Matthias/O-9055-2014 NR 43 TC 31 Z9 33 U1 0 U2 9 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 2005 VL 77 IS 10 BP 3315 EP 3323 DI 10.1021/ac048298p PG 9 WC Chemistry, Analytical SC Chemistry GA 927PS UT WOS:000229206800036 PM 15889924 ER PT J AU Tang, K Shvartsburg, AA Lee, HN Prior, DC Buschbach, MA Li, FM Tolmachev, AV Anderson, GA Smith, RD AF Tang, K Shvartsburg, AA Lee, HN Prior, DC Buschbach, MA Li, FM Tolmachev, AV Anderson, GA Smith, RD TI High-sensitivity ion mobility spectrometry/mass spectrometry using electrodynamic ion funnel interfaces SO ANALYTICAL CHEMISTRY LA English DT Article ID IONIZATION MASS-SPECTROMETRY; TIME-OF-FLIGHT; PROTEIN IDENTIFICATION TECHNOLOGY; COMPLEX PEPTIDE MIXTURES; ELECTROSPRAY-IONIZATION; GAS-PHASE; STRUCTURAL INFORMATION; LIQUID-CHROMATOGRAPHY; MULTICAPILLARY INLET; ATMOSPHERIC-PRESSURE AB The utility of ion mobility spectrometry (IMS) for separation of mixtures and structural characterization of ions has been demonstrated extensively, including in biological and nanoscience contexts. A major attraction of IMS is its speed, several orders of magnitude greater than that of condensed-phase separations. Nonetheless, IMS combined with mass spectrometry (MS) has remained a niche technique, substantially because of limited sensitivity resulting from ion losses at the IMS-MS junction. We have developed a new electrospray ionization (ESI)-IMS-QTOF MS instrument that incorporates electrodynamic ion funnels at both front ESI-IMS and rear IMS-QTOF interfaces. The front funnel is of the novel "hourglass" design that efficiently accumulates ions and pulses them into the IMS drift tube. Even for drift tubes of 2-m length, ion transmission through IMS and on to QTOF is essentially lossless across the range of ion masses relevant to most applications. The rf ion focusing at the IMS terminus does not degrade IMS resolving power, which exceeds 100 (for singly charged ions) and is close to the theoretical limit. The overall sensitivity of the present ESI-IMS-MS system is comparable to that of commercial ESI-MS, which should make IMS-MS suitable for analyses of complex mixtures with ultrahigh sensitivity and exceptional throughput. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 FU NCRR NIH HHS [P41 RR018522, RR18522] NR 67 TC 161 Z9 164 U1 5 U2 63 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 2005 VL 77 IS 10 BP 3330 EP 3339 DI 10.1021/ac048315a PG 10 WC Chemistry, Analytical SC Chemistry GA 927PS UT WOS:000229206800038 PM 15889926 ER PT J AU Francis, AW Ruggiero, CE Koppisch, AT Dong, JG Song, J Brettin, T Iyer, S AF Francis, AW Ruggiero, CE Koppisch, AT Dong, JG Song, J Brettin, T Iyer, S TI Proteomic analysis of Bacillus anthracis Sterne vegetative cells SO BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS LA English DT Article DE Bacillus anthracis Sterne; proteomics; mass spectrometry ID MASS-SPECTROMETRY; IDENTIFICATION; PROTEINS; BACTERIA; VACCINE; MIXTURES AB Mass spectrometry and proteomics have found increasing use as tools for the rapid detection of pathogenic bacteria, even when they are in a mixture of non-pathogenic relatives. The success of this technique is greatly augmented by the availability of publicly accessible proteomic databases for specific pathogenic bacteria. To aid proteomic detection analyses for the causative agent of anthrax, we have constructed a comprehensive proteomic catalogue of vegetative Bacillus anthracis Sterne cells using liquid chromatography tandem-mass spectrometry. Proteins were separated by molecular weight or isoelectric point prior to tryptic digestion. Alternatively, the whole protein extract was digested and tryptic peptides were separated by cation exchange chromatography prior to Reverse Phase-LC-MS/MS. The use of three complementary, pre-analytical separation techniques resulted in the identification of 1048 unique proteins, including 694 cytosolic, 153 membrane (including 27 cell wall), and 30 secreted proteins, accounting for 19% of the total predicted proteome. Each identified protein was functionally categorized using the gene attribute database from TIGR CMR. These results provide a large proteomic catalogue of vegetative B. anthracis cells and, coupled with the recent proteomic catalogue of B. anthracis spore proteins, form a thorough summary of proteins expressed in the active and dormant stages of this organism. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Iyer, S (reprint author), MS M888,PO 1663, Los Alamos, NM 87545 USA. EM siyer@lanl.gov NR 21 TC 24 Z9 24 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-9639 J9 BBA-PROTEINS PROTEOM JI BBA-Proteins Proteomics PD MAY 15 PY 2005 VL 1748 IS 2 BP 191 EP 200 DI 10.1016/j.bbapap.2005.01.007 PG 10 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 909XI UT WOS:000227893600007 PM 15769596 ER PT J AU Bordner, AJ Abagyan, R AF Bordner, AJ Abagyan, R TI REVCOM: a robust Bayesian method for evolutionary rate estimation SO BIOINFORMATICS LA English DT Article ID PROTEIN-PROTEIN INTERFACES; DNA-SEQUENCES; LOCAL RELIABILITY; BINDING SURFACES; HOT-SPOTS; ALIGNMENT; SITES; TREES; CONSERVATION; REGIONS AB Motivation: Evolutionary conservation estimated from a multiple sequence alignment is a powerful indicator of the functional significance of a residue and helps to predict active sites, ligand binding sites, and protein interaction interfaces. Many algorithms that calculate conservation work well, provided an accurate and balanced alignment is used. However, such a strong dependence on the alignment makes the results highly variable. We attempted to improve the conservation prediction algorithm by making it more robust and less sensitive to (1) local alignment errors, (2) overrepresentation of sequences in some branches and (3) occasional presence of unrelated sequences. Results: A novel method is presented for robust constrained Bayesian estimation of evolutionary rates that avoids overfitting independent rates and satisfies the above requirements. The method is evaluated and compared with an entropy-based conservation measure on a set of 1494 protein interfaces. We demonstrated that similar to 62% of the analyzed protein interfaces are more conserved than the remaining surface at the 5% significance level. A consistent method to incorporate alignment reliability is proposed and demonstrated to reduce arbitrary variation of calculated rates upon inclusion of distantly related or unrelated sequences into the alignment. C1 Molsoft LLC, La Jolla, CA 92037 USA. RP Bordner, AJ (reprint author), Oak Ridge Natl Lab, Div Comp Sci Math & Sci, POB 2008,MS6173, Oak Ridge, TN 37831 USA. EM bordner@ornl.gov NR 48 TC 8 Z9 9 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD MAY 15 PY 2005 VL 21 IS 10 BP 2315 EP 2321 DI 10.1093/bioinformatics/bti347 PG 7 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 928QA UT WOS:000229285600022 PM 15749694 ER PT J AU Song, JM Culha, M Kasili, PA Griffin, GD Vo-Dinh, T AF Song, JM Culha, M Kasili, PA Griffin, GD Vo-Dinh, T TI A compact CMOS biochip immunosensor towards the detection of a single bacteria SO BIOSENSORS & BIOELECTRONICS LA English DT Article DE biological warfare reagents; immunoassay; biochip; high sensitivity ID FLUORESCENCE; DIAGNOSTICS; BIOSENSORS; MOLECULES AB Recent use of biological warfare (BW) agents has led to a growing interest in the rapid and sensitive detection of pathogens. Therefore, the development of field-usable detection devices for sensitive and selective detection of BW agents is an important issue. In this work, we report a portable biochip system based on complementary Metal oxide semiconductor (CMOS) technology that has great potential as a device for single-bacteria detection. The possibility of single-bacteria detection is reported using an immunoassay coupled to laser-induced fluorescence (LIF) detection. Bacillus globigii spores, which are a surrogate species for B. anthracis spores, were used as the test sample. Enzymatic amplification following immunocomplex formation allowed remarkably sensitive detection of B. globigii spores, and could preclude a complicated optical and instrumental system usually required for high-sensitive detection. Atomic force microscopy (AFM) was employed to investigate whether B. globigii spores detected in the portable biochip system exist in single-cell or multicellular form. It was found that B. globigii spores mostly exist in multicellular form with a small minority of single-cell form. The results showed that the portable biochip system has great potential as a device for single-particle or possibly even single-organism detection. (c) 2004 Published by Elsevier B.V. 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 53 Z9 55 U1 2 U2 10 PU ELSEVIER ADVANCED TECHNOLOGY PI OXFORD PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0956-5663 J9 BIOSENS BIOELECTRON JI Biosens. Bioelectron. PD MAY 15 PY 2005 VL 20 IS 11 BP 2203 EP 2209 DI 10.1016/j.bios.2004.08.033 PG 7 WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical; Electrochemistry; Nanoscience & Nanotechnology SC Biophysics; Biotechnology & Applied Microbiology; Chemistry; Electrochemistry; Science & Technology - Other Topics GA 922HH UT WOS:000228827000003 PM 15797317 ER PT J AU Sullivan, Z AF Sullivan, Z TI Fast evaluation of CTEQ parton distributions in Monte Carlos SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE quarks; gluon; parton; interpolation; optimization; Monte Carlo ID LIBRARY; NUCLEON AB A few changes to the routines that calculate CTEQ parton distribution functions allow modem compilers to optimize the evaluations, while having no quantitative effect on the results. Overall computation time is reduced by a factor of 4-5 in matrix-element calculations, and by 1.3-2.5 in showering Monte Carlo event generators. Similar improvements in performance may be expected in any calculations relying heavily on interpolation or multiple calls to functions. © 2005 Elsevier B.V. All rights reserved. C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Sullivan, Z (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA. EM zack@fnal.gov NR 17 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD MAY 15 PY 2005 VL 168 IS 1 BP 25 EP 31 DI 10.1016/j.cpc.2004.12.015 PG 7 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 927EC UT WOS:000229174200002 ER PT J AU Alvarez, G Sen, C Furukawa, N Motome, Y Dagotto, E AF Alvarez, G Sen, C Furukawa, N Motome, Y Dagotto, E TI The truncated polynomial expansion Monte Carlo method for fermion systems coupled to classical fields: a model independent implementation SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE moment expansion; Monte Carlo method; correlated electrons ID DOUBLE EXCHANGE MODEL; PHASE-SEPARATION; ALGORITHM AB A software library is presented for the polynomial expansion method (PEM) of the density of states (DOS) introduced in [Y. Motome, N. Furukawa, J. Phys. Soc. Japan 68 (1999) 3853; N. Furukawa, Y. Motome, H. Nakata, Comput. Phys. Comm. 142 (2001) 410]. The library provides all necessary functions for the use of the PEM and its truncated version (TPEM) in a model independent way. The PEM/TPEM replaces the exact diagonalization of the one electron sector in models for fermions coupled to classical fields. The computational cost of the algorithm is O(N)-with N the number of lattice sites-for the TPEM [N. Furukawa, Y. Motome, J. Phys. Soc. Japan 73 (2004) 1482] which should be contrasted with the computational cost of the diagonalization technique that scales as O(N-4). The method is applied for the first time to a double exchange model with finite Hund coupling and also to diluted spin-fermion models. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. Aoyama Gakuin Univ, Dept Phys, Sagamihara, Kanagawa 2298558, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Alvarez, G (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA. EM alvarezcampg@ornl.gov NR 20 TC 15 Z9 15 U1 2 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD MAY 15 PY 2005 VL 168 IS 1 BP 32 EP 45 DI 10.1016/j.cpc.2005.02.001 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 927EC UT WOS:000229174200003 ER PT J AU Chen, G Flury, M Harsh, JB Lichtner, PC AF Chen, G Flury, M Harsh, JB Lichtner, PC TI Colloid-facilitated transport of cesium in variably saturated Hanford sediments SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID UNSATURATED POROUS-MEDIA; CATION-EXCHANGE; SILICA COLLOIDS; IONIC-STRENGTH; SAND COLUMNS; RETENTION; KAOLINITE; MIGRATION; MODEL; WATER AB Radioactive Cs-137 has leaked from underground waste tanks into the vadose zone at the Hanford Reservation in south-central Washington State. There is concern that (CS)-C-137, currently located in the vadose zone, can reach the groundwater. In this study, we investigated whether, and to what extent, colloidal particles can facilitate the, transport of Cs-137 at Hanford. We used colloidal materials isolated from Hanford sediments. Transport experiments were conducted under variably saturated, steady-state flow conditions in repacked, 20 cm long Hanford sediment columns, with effective water saturations ranging from 0.2 to 1.0. Cesium, pre-associated with colloids, was stripped off during transport through the sediments. The higher the flow rates, the less Cs was stripped off, indicating in part that Cs desorption from carrying colloids was a residence-time-dependent process. Depending on the flow rate, up to 70% of the initially sorbed Cs desorbed from colloidal carriers and was captured in the stationary sediments. Less Cs was stripped off colloids under unsaturated than under saturated flow conditions at similar flow rates. This phenomenon was likely due to the reduced availability of sorption sites for Cs on the sediments as the water content decreased and water flow was divided between mobile and immobile regions. C1 Washington State Univ, Ctr Multiphase Environm Res, Dept Crop & Soil Sci, Pullman, WA 99164 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Flury, M (reprint author), Washington State Univ, Ctr Multiphase Environm Res, Dept Crop & Soil Sci, Pullman, WA 99164 USA. EM flury@mail.wsu.edu RI Harsh, James/C-7455-2014; Flury, Markus/H-2983-2012 OI Harsh, James/0000-0002-0177-3342; Flury, Markus/0000-0002-3344-3962 NR 34 TC 45 Z9 48 U1 7 U2 31 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 2005 VL 39 IS 10 BP 3435 EP 3442 DI 10.1021/es048978+ PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 927KV UT WOS:000229193700009 PM 15952347 ER PT J AU Singleton, MJ Woods, KN Conrad, ME Depaolo, DJ Dresel, PE AF Singleton, MJ Woods, KN Conrad, ME Depaolo, DJ Dresel, PE TI Tracking sources of unsaturated zone and groundwater nitrate contamination using nitrogen and oxygen stable isotopes at the Hanford Site, Washington SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID FRESH-WATER; FRACTIONATION; SOLUBILITY; DELTA-N-15; SEDIMENTS; SEAWATER; BENEATH; ORIGIN; O-18; NO3 AB The nitrogen and oxygen isotopic compositions of nitrate in pore water extracts from unsaturated zone (UZ) core samples and groundwater samples indicate at least four potential sources of nitrate in groundwaters at the U.S. DOE Hanford Site in south-central Washington. Natural sources of nitrate identified include microbially produced nitrate from the soil column (delta(15)N of 4-8 parts per thousand, delta(18)O of -9 to 2 parts per thousand) and nitrate in buried caliche layers (delta(15)N of 0-8 parts per thousand, 6180 of -6 to 42 parts per thousand). Isotopically distinct industrial sources of nitrate include nitric acid in low-level disposal waters (delta(15)N similar to 0 parts per thousand, delta(18)O approximate to 23 parts per thousand) and co-contaminant nitrate in high-level radioactive waste from plutonium processing (delta(15)N of 8-33 parts per thousand, delta(18)O of -9 to 7 parts per thousand). The isotopic compositions of nitrate from 97 groundwater wells with concentrations up to 1290 mg/L NO3- have been analyzed. Stable isotope analyses from this study site, which has natural and industrial nitrate sources, provide a tool to distinguish nitrate sources in an unconfined aquifer where concentrations alone do not. These data indicate that the most common sources of high nitrate concentrations in groundwater at Hanford are nitric acid and natural nitrate flushed out of the UZ during disposal of low-level wastewater. Nitrate associated with high-level radioactive UZ contamination does not appear to be a major source of groundwater nitrate at this time. C1 Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Singleton, MJ (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-231, Livermore, CA 94551 USA. EM singleton20@llnl.gov RI Conrad, Mark/G-2767-2010 NR 31 TC 20 Z9 21 U1 1 U2 25 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 2005 VL 39 IS 10 BP 3563 EP 3570 DI 10.1021/es0481070 PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 927KV UT WOS:000229193700025 PM 15952359 ER PT J AU Stepanauskas, R Glenn, TC Jagoe, CH Tuckfield, RC Lindell, AH McArthur, JV AF Stepanauskas, R Glenn, TC Jagoe, CH Tuckfield, RC Lindell, AH McArthur, JV TI Elevated microbial tolerance to metals and antibiotics in metal-contaminated industrial environments SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID FLOW-CYTOMETRY; HEAVY-METAL; TOTAL BACTERIA; WASTE-WATER; RESISTANCE; PERMEABILITY; ENUMERATION; PATTERNS; MERCURY; EFFLUX AB To test the hypothesis that industrial metal contaminants select for microorganisms tolerant to unrelated agents, such as antibiotics, we analyzed metal and antibiotic tolerance patterns in microbial communities in the intake and discharge of ash settling basins (ASBs) of three Goal-fired power plants. High-throughput flow-cytometric analyses using cell viability probes were employed to determine tolerances of entire bacterioplankton communities, avoiding bias toward culturable versus nonculturable bacteria. We found that bacterioplankton collected in ASB discharges were significantly more tolerant to metal and antibiotic exposures than bacterioplankton collected in ASB intakes. Optical properties of microorganisms collected in ASB discharges indicated no defensive physiological adaptations such as formation of resting stages or excessive production of exopolymers. Thus, it is likely that the elevated frequency of metal and antibiotic tolerances in bacterioplankton in ASB discharges were caused by shifts in microbial community composition, resulting from the selective pressure imposed by elevated metal concentrations or organic toxicants present in ASBs. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ S Carolina, Dept Biol Sci, Columbia, SC 29208 USA. Westinghouse Savannah River Co, Savannah River Natl Lab, Aiken, SC 29808 USA. RP Stepanauskas, R (reprint author), Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. EM ramunas@uga.edu RI Glenn, Travis/A-2390-2008; Garcia-Armisen, Tamara/A-6173-2008; OI Stepanauskas, Ramunas/0000-0003-4458-3108 NR 38 TC 66 Z9 68 U1 5 U2 48 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 2005 VL 39 IS 10 BP 3671 EP 3678 DI 10.1021/es048468f PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 927KV UT WOS:000229193700038 PM 15952371 ER PT J AU Sharma, VK Burnett, CR Yngard, RA Cabelli, DE AF Sharma, VK Burnett, CR Yngard, RA Cabelli, DE TI Iron(VI) and Iron(V) oxidation of copper(I) cyanide SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID PULSE-RADIOLYSIS; AQUEOUS CYANIDE; POTASSIUM FERRATE(VI); ALKALINE-MEDIUM; REDUCTION; KINETICS; REMOVAL; WATER; THIOCYANATE; WASTEWATERS AB Copper(l) cyanide (Cu(CN)(4)(3-)) in the gold mine industry presents the biggest concern in cyanide management because it is much more stable than free cyanide. Cu(CN)(4)(3-) is highly toxic to aquatic life; therefore, environmentally friendly techniques are required for the removal of Cu(CN)(4)(3-) from gold mine effluent. The oxidation of Cu(CN)(4)(3-) by iron(VI) ((FeO42-)-O-VI, Fe(VI)) and iron(V) ((FeO43-)-O-V, Fe(V)) was studied using stopped-flow and premix pulse radiolysis techniques. The stoichiometry with Fe(VI) was determined to be 5HFeO(4)(-) + Cu(CN)(4)(3-) + 8H(2)O -> 5Fe(OH)(3) + Cu2+ + 4CNO(-) +3/2O(2) + 6OH(-). The rate law for the oxidation of Cu(CN)(4)(3-) by Fe(VI) was found to be first-order with each reactant. The rates decreased with increasing pH and were mostly related to a decrease in concentration of reactive protonated Fe(VI) species, HFeO4. A mechanism is proposed that agrees with the observed reaction stoichiometry and rate law. The rate constant for the oxidation of Cu(CN)(4)(3-) by Fe(V) was determined at pH 12.0 as 1.35 +/- 0.02 x 10(7) M-1 s(-1), which is approximately 3 orders of magnitude larger than Fe(VI). Results indicate that Fe(VI) is highly efficient for removal of cyanides in gold mill effluent. C1 Florida Inst Technol, Dept Chem, Melbourne, FL 32901 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Sharma, VK (reprint author), Florida Inst Technol, Dept Chem, 150 W Univ Blvd, Melbourne, FL 32901 USA. EM vsharma@fit.edu OI Sharma, Virender/0000-0002-5980-8675 NR 40 TC 53 Z9 55 U1 2 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X EI 1520-5851 J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD MAY 15 PY 2005 VL 39 IS 10 BP 3849 EP 3854 DI 10.1021/es048196g PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 927KV UT WOS:000229193700063 PM 15952395 ER PT J AU Davidson, ER Clark, AE AF Davidson, ER Clark, AE TI Spin polarization and annihilation for radicals and diradicals SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article DE spin polarization; spin annihilation; radicals; diradicals ID TRANSITION-METAL DIMERS; LOCAL SPIN AB The extent of spin polarization in unrestricted Hartree-Fock and density functional B3LYP calculations has been determined for a few monoradicals as well as the corresponding diradicals containing these monoradicals as functional groups. Simple relations are found that explain the very high value for the average spin after projecting out the triplet component from a broken-spin calculation on the singlet state. The implications of these results for estimating the energy of the low-spin diradical by spin projection or by the Heisenberg Hamiltonian are discussed. (c) 2005 Wiley Periodicals, Inc. C1 Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Davidson, ER (reprint author), Univ N Carolina, Dept Chem, CB 3290, Chapel Hill, NC 27599 USA. EM ernest_davidson@unc.edu RI Davidson, Ernest/K-9709-2015 OI Davidson, Ernest/0000-0002-3096-480X NR 15 TC 30 Z9 30 U1 2 U2 7 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD MAY 15 PY 2005 VL 103 IS 1 BP 1 EP 9 DI 10.1002/qua.20478 PG 9 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA 918SL UT WOS:000228567800001 ER PT J AU Alsmadi, AM El-Khatib, S de Chatel, PF Nakotte, H Lacerda, AH Jung, MH Andreev, AV Honda, F Sechovsky, V AF Alsmadi, AM El-Khatib, S de Chatel, PF Nakotte, H Lacerda, AH Jung, MH Andreev, AV Honda, F Sechovsky, V TI Magnetic field effects in UNi1/3Ru2/3Al SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB We report on the electronic properties of a UN1/3RU2/3Al single crystal as a function of temperature and magnetic field. Our specific-heat, magnetization, and resistivity data provide strong evidence that the uranium 5f moments order ferromagnetically below T-C=74 K. Magnetic measurements reveal that the c axis is the easy magnetization direction with a saturation moment of about 0.78 mu(B)/U-atom. Our neutron diffraction studies on UNi1/3Ru2/3Al provide strong evidence that Ni occupies the 1b (and Ru the 2c) positions of the ZrNiAl structure. We argue that such preferential occupation of Ni and Ru atoms is responsible for the observed ferromagnetic ground state. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Hashemite Univ, Dept Phys, Zarqa 13115, Jordan. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. Los Alamos Natl Lab, Pulse Field Facil, NHMFL, Los Alamos, NM 87545 USA. Korea Basic Sci Inst, MST, Taejon 305333, South Korea. Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic. Charles Univ, Fac Math & Phys, CR-12116 Prague, Czech Republic. RP Alsmadi, AM (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM alsmadi@anl.gov RI Andreev, Alexander/B-6057-2011; HONDA, Fuminori/D-5578-2015; Sechovsky, Vladimir/A-5256-2008; Andreev, Anatoli/B-5882-2016 OI HONDA, Fuminori/0000-0002-9485-7384; Sechovsky, Vladimir/0000-0003-1298-2120; Andreev, Anatoli/0000-0002-3305-1205 NR 12 TC 0 Z9 0 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A919 DI 10.1063/1.1853875 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300074 ER PT J AU Antropov, V AF Antropov, V TI Time-dependent density-functional spin dynamics and its application for Fe and Ni SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETS; APPROXIMATION AB The main equations of time-dependent density-functional spin dynamics are analyzed. Their relation with phenomenological spin dynamics is discussed. The finite temperature calculations in local-density approximation are performed for ferromagnetic Fe and Ni. The strong magnetic short-range order has been found in Ni. The influence of this dynamical order on the observed physical properties of magnets is briefly discussed. (c) 2005 American Institute of Physics. C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RP Antropov, V (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. EM antropov@ameslab.gov NR 12 TC 5 Z9 5 U1 1 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A704 DI 10.1063/1.1847892 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300036 ER PT J AU Berdahl, P Reade, RP Russo, RE AF Berdahl, P Reade, RP Russo, RE TI Rapid ion-beam-induced Ostwald ripening in two dimensions SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID YTTRIA-STABILIZED ZIRCONIA; GRAIN-GROWTH; THIN-FILMS; ASSISTED DEPOSITION; BUFFER LAYERS; BOMBARDMENT AB Ion-beam-induced grain coarsening in initially amorphous (Zr,Y)O-x layers is observed by atomic force microscopy. The films were bombarded at room temperature. Grain-boundary grooves indicate that the larger grains have a diameter of about 83 nm at 2 min, and 131 nm at 5 min. Up to 5 min, the grain size evolves with time as t(beta), with beta=0.5 +/- 0.2. Based on a new parametrization of ion-induced grain-boundary translation, we derive a theoretical estimate of beta=3/7, consistent with our measurement. By 7.5 min, many of the grain-boundary grooves are shallow and indistinct, suggesting that the surviving grains are mutually well aligned. Such rapid grain growth at room temperature is unusual and is enabled by the ion bombardment. Similar grain growth processes are expected during ion-beam-assisted deposition film growth. The status of ion-textured yttria stabilized zirconia films as buffer layers for high-current high-temperature superconducting films is briefly summarized. (c) 2005 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Berdahl, P (reprint author), Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. EM phberdahl@lbl.gov NR 19 TC 2 Z9 2 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 103511 DI 10.1063/1.1894584 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100034 ER PT J AU Brown, G Schulthess, TC AF Brown, G Schulthess, TC TI Wang-Landau estimation of magnetic properties for the Heisenberg model SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MONTE-CARLO AB The Wang-Landau method is a Monte Carlo procedure for estimating the equilibrium density of states g(E) of spin models, which can then be used to rapidly calculate properties such as the free energy and specific heat as functions of temperature. Here, the Wang-Landau method is validated for the Heisenberg model by comparison with the traditional Monte Carlo estimates, and a procedure for estimating the minimum temperature for valid results is presented. In addition, we show that the Wang-Landau method can be extended to calculate zero-field magnetic properties such as the zero-field susceptibility. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Ctr Computat Sci, Oak Ridge, TN 37831 USA. Florida State Univ, Sch Computat Sci, Tallahassee, FL 32306 USA. Oak Ridge Natl Lab, Ctr Computat Sci, Oak Ridge, TN 37831 USA. RP Brown, G (reprint author), Oak Ridge Natl Lab, Ctr Computat Sci, POB 2008, Oak Ridge, TN 37831 USA. EM browngrg@csit.fsu.edu RI Brown, Gregory/F-7274-2016 OI Brown, Gregory/0000-0002-7524-8962 NR 7 TC 20 Z9 20 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10E303 DI 10.1063/1.1847311 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300241 ER PT J AU Buchanan, KS Guslienko, KY Choe, SB Doran, A Scholl, A Bader, SD Novosad, V AF Buchanan, KS Guslienko, KY Choe, SB Doran, A Scholl, A Bader, SD Novosad, V TI Magnetization reversal in patterned double-vortex structures SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB The magnetization reversal process for micron and submicron disk-shaped dots is controlled by successive nucleation, displacement, and annihilation of a magnetic vortex. Here the reversal process for a system involving two ferromagnetic disks separated by a nonmagnetic spacer is investigated experimentally, analytically, and numerically. Permalloy (Ni80Fe20 or Py) dots with thicknesses of up to 40 nm and diameters of 0.5-2.5 mu m separated by a copper spacer (1-45 nm thick) were considered. Micromagnetic simulations indicate that the disks will each support oppositely directed vortices at remanence and also show the hysteresis of the coupled structures. The calculations are compared to hysteresis loops and x-ray photoemission electron microscopy images of Py/Cu/Py dots produced by electron-beam lithography and magnetron sputtering. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Buchanan, KS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM buchanan@anl.gov RI Bader, Samuel/A-2995-2013; Novosad, Valentyn/C-2018-2014; Scholl, Andreas/K-4876-2012; Novosad, V /J-4843-2015; OI Buchanan, Kristen/0000-0003-0879-0038 NR 7 TC 12 Z9 12 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 2005 VL 97 IS 10 AR 10H503 DI 10.1063/1.1855207 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500003 ER PT J AU Campillo, G Hoffmann, A Gomez, ME Prieto, R AF Campillo, G Hoffmann, A Gomez, ME Prieto, R TI Exchange bias and magnetic structure in modulation-doped manganite superlattices SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETOTRANSPORT; MULTILAYERS; INTERFACE; FILMS AB Superlattices of antiferromagnetic (AF) La1/3Ca2/3MnO3 and ferrornagnetic (F) La2/3Ca1/3MnO3 were grown using sputtering technique. The AF layer thickness ranged between 3.9 nm <= t(AF) <= 15.6 nm while the F layer thickness was kept constant (7.8 nm). Hysteresis measurements after field cooling, show an exchange bias up to a temperature of similar to 100 K. Surprisingly, the saturation magnetization increases with antiferromagnetic layer thickness and can exceed the expected bulk value for the La2/3Ca1/3MnO3 composition, whereas the interface coupling energy between the AF and F layers derived from the exchange bias is constant. This suggests that magnetization depth profile extends beyond the chemical doping interface. (c) 2005 American Institute of Physics. C1 Univ Valle, Dept Phys, Cali 25360, Colombia. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Campillo, G (reprint author), Univ Valle, Dept Phys, Cali 25360, Colombia. EM gcampil@calima.univalle.edu.co RI Campillo, Gloria/A-8299-2013; Hoffmann, Axel/A-8152-2009 OI Hoffmann, Axel/0000-0002-1808-2767 NR 18 TC 5 Z9 6 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10K104 DI 10.1063/1.1847313 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500091 ER PT J AU Chang, KC Cao, Y Porter, LM Bentley, J Dhar, S Feldman, LC Williams, JR AF Chang, KC Cao, Y Porter, LM Bentley, J Dhar, S Feldman, LC Williams, JR TI High-resolution elemental profiles of the silicon dioxide/4H-silicon carbide interface SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID IMPROVED PERFORMANCE; POWER MOSFETS; NITRIC-OXIDE; BAND-EDGES; SEMICONDUCTOR; SPECTROSCOPY; POLYTYPE; ANNEALS; DEVICES AB High-resolution elemental profiles were obtained from SiO2(N)/4H-SiC structures by spatially resolved electron energy-loss spectroscopy (EELS) performed in the scanning transmission electron microscopy mode. The results show that following annealing in NO, N was exclusively incorporated within similar to 1 nm of the SiO2(N) /4H-SiC interface. Mean interfacial nitrogen areal densities measured by EELS were similar to(1.0 +/- 0.2) x 10(15) cm(-2) in carbon-face samples and (0.35 +/- 0.13) x 10(15) cm(-2) in Si-face samples; these results are consistent with nuclear reaction analysis measurements. Some of the interface regions in the C-face samples also showed excess carbon that was not removed by the NO annealing process, in contrast with previous results on Si-face samples. (c) 2005 American Institute of Physics. C1 Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Vanderbilt Univ, Interdisciplinary Mat Sci, Nashville, TN 37235 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Auburn Univ, Dept Phys, Auburn, AL 36849 USA. RP Chang, KC (reprint author), Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA. EM lporter@andrew.cmu.edu RI Porter, Lisa/C-9729-2010 OI Porter, Lisa/0000-0002-0970-0420 NR 30 TC 35 Z9 35 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 104920 DI 10.1063/1.1904728 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100182 ER PT J AU Chang, S Janssen, Y Garlea, VO Zarestky, J Nakotte, H McQueeney, RJ AF Chang, S Janssen, Y Garlea, VO Zarestky, J Nakotte, H McQueeney, RJ TI Magnetic structure of the local-moment antiferromagnet CeCuSn SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID SYSTEM AB We report on single-crystal neutron diffraction studies of the local-moment antiferromagnet CeCuSn. The ground-state magnetic structure is characterized by a magnetic wave vector k = (0. 115, 0, 0). The onset of antiferromagnetic order occurs around 12 K with an inflection in the temperature dependence of the magnetic intensities at about 8 K. This is in contrast to bulk measurements, which only show broad features at 8 - 10 K. The ordered moments are likely reduced from the free-ion moment for Ce. (c) 2005 American Institute of Physics. C1 Ames Lab, Ames, IA 50011 USA. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Chang, S (reprint author), Ames Lab, Ames, IA 50011 USA. EM schang@ameslab.gov RI McQueeney, Robert/A-2864-2016; Garlea, Vasile/A-4994-2016 OI McQueeney, Robert/0000-0003-0718-5602; Garlea, Vasile/0000-0002-5322-7271 NR 11 TC 2 Z9 2 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 2005 VL 97 IS 10 AR 10A913 DI 10.1063/1.1850402 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300068 ER PT J AU Cho, BK Rhyee, JS Kim, JY Emilia, M Canfield, PC AF Cho, BK Rhyee, JS Kim, JY Emilia, M Canfield, PC TI Anomalous magnetoresistance at low temperatures (T <= 10 K) in a single crystal of GdB4 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID RARE-EARTH TETRABORIDES; BORIDES AB We successfully synthesized pure single crystals of GdB4, which reveals RRR=550, defined as RRR p(300 K) / rho(2 K). The temperature derivative of resistivity dp(T)/dT shows a transitionlike change of electronic property at Ta approximate to 10 K, in addition to the known antiferromagnetic transition at T-N=42 K. We also found that the rho(T) shows an anomalous increase under the applied magnetic fields H below T, which leads to a positive magnetoresistance ratio MR=-[p(H,T) -rho(0,T)]/rho(0,T)=58 800% at T=2 K and H=7 T. Furthermore, the electronic feature near T,, manifests itself by a broad bump near T 10 K in a specific heat measurement, which indicates that the transition at T, is a bulk property. We found that the positive and large magnetoresistance can be described by an empirical function, based on Kohler's rule for the electron dynamics of a pure simple metal. (c) 2005 American Institute of Physics. C1 Gwangju Inst Sci & Technol, Ctr Frontier Mat, Kwangju 500712, South Korea. Gwangju Inst Sci & Technol, Dept Mat Sci & Engn, Kwangju 500712, South Korea. Iowa State Univ, Ames Natl Lab, Dept Phys & Astron, Ames, IA 50011 USA. RP Cho, BK (reprint author), Gwangju Inst Sci & Technol, Ctr Frontier Mat, Kwangju 500712, South Korea. EM chobk@gist.ac.kr RI Canfield, Paul/H-2698-2014 NR 12 TC 14 Z9 14 U1 6 U2 28 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 2005 VL 97 IS 10 AR 10A923 DI 10.1063/1.1855202 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300078 ER PT J AU Chung, SH Hoffmann, A Guslienko, K Bader, SD Liu, C Kay, B Makowski, L Chen, L AF Chung, SH Hoffmann, A Guslienko, K Bader, SD Liu, C Kay, B Makowski, L Chen, L TI Biological sensing with magnetic nanoparticles using Brownian relaxation (invited) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID PARTICLES; BIOSENSOR; SUSCEPTIBILITY; FERROFLUIDS; DYNAMICS; DOMAIN; SENSOR AB Magnetic nanoparticles coated with biochemical ligands are enabling many biological and medical applications. In particular biomagnetic sensors have potential advantages of simplicity and rapidity. We demonstrate a substrate-free biomagnetic sensing approach using the magnetic ac susceptibility of ferromagnetic particles suspended in a liquid. The magnetic relaxation of these particles is mainly due to Brownian rotational diffusion, which can be modified by binding the particles to the intended target. This scheme has several advantages: (i) it requires only one binding event; (ii) there is an inherent check of integrity; and (iii) the signal contains additional information about the target size. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. RP Chung, SH (reprint author), Argonne Natl Lab, Div Sci Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Bader, Samuel/A-2995-2013; Hoffmann, Axel/A-8152-2009 OI Hoffmann, Axel/0000-0002-1808-2767 NR 21 TC 53 Z9 53 U1 2 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 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10R101 DI 10.1063/1.1853694 PN 3 PG 5 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500316 ER PT J AU Clark, AE Wun-Fogle, M Restorff, JB Dennis, KW Lograsso, TA McCallum, RW AF Clark, AE Wun-Fogle, M Restorff, JB Dennis, KW Lograsso, TA McCallum, RW TI Temperature dependence of the magnetic anisotropy and magnetostriction of Fe100-xGax (x=8.6, 16.6, 28.5) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID FE-GA ALLOYS AB The temperature dependence of the lowest order magnetic anisotropy constant K-1 and the lowest order saturation magnetostriction constant, (3/2)lambda(100), were measured from 4 K to 300 K for Fe91.4Ga8.6,Fe83.4Ga16.6, and Fe71.5Ga28.5 and were compared to the normalized magnetization power law, m(l(l+1)/2). Fe91.4Ga8.6 maintains the magnetostriction anomaly of Fe (d lambda(100)/dT > 0) and K, is a reasonable fit to the m(l(l+1)/2) power law with K-1(0 K) congruent to 90 kJ/m(3). Fe83.4Ga16.6 does not show a magnetostriction anomaly, but fits the power law remarkably well. Fe71.5Ga28.5 possesses a small K-1(similar to 1 kJ/m(3)) at all temperatures and a large temperature dependent magnetostriction, reaching similar to 800 ppm at low temperature. (c) 2005 American Institute of Physics. C1 Clark Associates, Adelphi, MD 20783 USA. USN, Ctr Surface Warfare, Carderock Div, Bethesda, MD 20817 USA. Iowa State Univ, Ames Lab, USDOE, Ames, IA 50010 USA. RP Clark, AE (reprint author), Clark Associates, Adelphi, MD 20783 USA. EM wunfoglem@nswccd.navy.mil NR 7 TC 21 Z9 21 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 2005 VL 97 IS 10 AR 10M316 DI 10.1063/1.1856731 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500142 ER PT J AU Dong, SX Zhai, JY Bai, FM Li, JF Viehland, D Lograsso, TA AF Dong, SX Zhai, JY Bai, FM Li, JF Viehland, D Lograsso, TA TI Magnetostrictive and magnetoelectric behavior of Fe-20 at. % Ga/Pb(Zr,Ti)O-3 laminates SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FE-GA; ALLOYS; COMPOSITES; POLARIZATION AB The magnetostrictive and magnetoelectric (ME) properties of laminate composites of Fe-20 at. % Ga and Pb(Zr,Ti)O-3 (PZT) have been studied for laminates of different geometries. The results show that (i) a long-type magnetostrictive Fe-20 at. % Ga crystal plate oriented along (001), and magnetized in its longitudinal (or length) direction has higher magnetostriction than a disk-type one; and consequently (ii) a long-type Fe-20 at. % Ga/PZT laminate has a giant ME effect, and is sensitive to low-level magnetic fields. (c) 2005 American Institute of Physics. C1 Virginia Tech, Blacksburg, VA 24061 USA. Ames Lab, Ames, IA 50011 USA. RP Dong, SX (reprint author), Virginia Tech, 306 Holden Hall, Blacksburg, VA 24061 USA. EM sdong@mse.vt.edu RI Dong, Shuxiang/A-9849-2012; Bai, Feiming/K-5762-2013; Zhai, Junyi/K-4162-2014 NR 31 TC 49 Z9 49 U1 2 U2 16 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 2005 VL 97 IS 10 AR 103902 DI 10.1063/1.1899247 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100087 ER PT J AU Dorf, L Raitses, Y Fisch, NJ AF Dorf, L Raitses, Y Fisch, NJ TI Experimental studies of anode sheath phenomena in a Hall thruster discharge SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SEGMENTED ELECTRODE; OPERATION; REGION; MODEL AB Both electron-repelling and electron-attracting anode sheaths in a Hall thruster were characterized by measuring the plasma potential with biased and emissive probes [L. Dorf, Y. Raitses, V. Semenov, and N. J. Fisch, Appl. Phys. Lett. 84, 1070 (2004)]. In the present work, two-dimensional structures of the plasma potential, electron temperature, and plasma density in the near-anode region of a Hall thruster with clean and dielectrically coated anodes are identified. Possible mechanisms of anode sheath formation in a Hall thruster are analyzed. The path for current closure to the anode appears to be the determining factor in the anode sheath formation process. The main conclusion of this work is that the anode sheath formation in Hall thrusters differs essentially from that in the other gas discharge devices, such as a glow discharge or a hollow anode, because the Hall thruster utilizes long electron residence times to ionize rather than high neutral pressures. 0 2005 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Dorf, L (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM ldorf@lanl.gov NR 42 TC 18 Z9 18 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 103309 DI 10.1063/1.1915516 PN 1 PG 9 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100023 ER PT J AU Dumesnil, K Dufour, C Mangin, P Fitzsimmons, MR Park, S Rhyne, JJ Rogalev, A Borchers, JA AF Dumesnil, K Dufour, C Mangin, P Fitzsimmons, MR Park, S Rhyne, JJ Rogalev, A Borchers, JA TI Magnetization reversal in a YFe2-dominant DyFe2/YFe2 exchange-coupled superlattice: An x-ray magnetic circular dichroism and polarized neutron reflectometry study SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB Combined chemical-selective XMCD and depth-resolved PNR experiments have been performed to unravel magnetic configurations in a [(30 angstrom)DyFe2/(120 angstrom)YFe2](22) superlattice, in which the magnetization of the soft YFe2 layer dominates. The magnetization of the YFe2 component is nearly always saturated, flipping directly from positive to negative saturation, while the net magnetization of the hard DyFe2 component significantly varies in high fields and is probably nonuniform. (c) 2005 American Institute of Physics. C1 Univ Nancy 1, Phys Mat Lab, F-54506 Vandoeuvre Les Nancy, France. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Los Alamos Natl Lab, LANSCE, Lujan Ctr, Los Alamos, NM 87545 USA. European Synchrotron Radiat Facil, F-38043 Grenoble, France. RP Dumesnil, K (reprint author), Univ Nancy 1, Phys Mat Lab, BP 239, F-54506 Vandoeuvre Les Nancy, France. RI Lujan Center, LANL/G-4896-2012; OI DUMESNIL, Karine/0000-0002-2304-4490 NR 10 TC 3 Z9 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10K108 DI 10.1063/1.1853840 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500095 ER PT J AU Eid, KF Stone, MB Maksimov, O Shih, TC Ku, KC Fadgen, W Palmstrom, CJ Schiffer, P Samarth, N AF Eid, KF Stone, MB Maksimov, O Shih, TC Ku, KC Fadgen, W Palmstrom, CJ Schiffer, P Samarth, N TI Exchange biasing of the ferrornagnetic semiconductor (Ga,Mn)As by MnO (invited) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID SPINTRONICS; FILMS AB We provide an overview of progress on the exchange biasing of a ferromagnetic semiconductor (Ga(1-x)Mn(x)As) by proximity to an antiferromagnetic oxide layer (MnO). We present a detailed characterization study of the antiferromagnetic layer using Rutherford backscattering spectrometry, x-ray photoelectron spectroscopy, transmission electron microscopy, and x-ray reflection. In addition, we describe the variation of the exchange and coercive fields with temperature and cooling field for multiple samples. (c) 2005 American Institute of Physics. C1 Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN USA. Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA. RP Eid, KF (reprint author), Penn State Univ, Dept Phys, University Pk, PA 16802 USA. EM nsamarth@psu.edu RI Schiffer, Peter/F-3227-2011; Stone, Matthew/G-3275-2011; Samarth, Nitin/C-4475-2014; OI Stone, Matthew/0000-0001-7884-9715; Samarth, Nitin/0000-0003-2599-346X; Schiffer, Peter/0000-0002-6430-6549 NR 21 TC 12 Z9 12 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10D304 DI 10.1063/1.1846033 PN 2 PG 6 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300197 ER PT J AU Evans, PG Rugheimer, PP Lagally, MG Lee, CH Lal, A Xiao, Y Lai, B Cai, Z AF Evans, PG Rugheimer, PP Lagally, MG Lee, CH Lal, A Xiao, Y Lai, B Cai, Z TI Microfabricated strained substrates for Ge epitaxial growth SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SILICON-ON-INSULATOR; SI(001); DIFFUSION; SI; SURFACES; STRESS AB The manipulation of strain in micromachined silicon structures presents an opportunity in the control of surface processes in epitaxial growth. With appropriate fabrication techniques, the magnitude, crystallographic direction, and symmetry of the strain at a Si surface can be precisely controlled with this strategy. Synchrotron x-ray microdiffraction techniques allow simultaneous independent measurements of the strain and bending in these structures and serve to calibrate the fabrication process. Bending is the dominant source of strain in a microfabricated Si bridge loaded at its ends by silicon nitride thin films that we have used as a strained substrate in studies of Ge epitaxial growth. The total strain difference between the top and bottom of the bent bridge exceeds 10(-3) in present structures and can potentially be increased in optimized devices. These micromachined substrates complement other methods for producing strained silicon and silicon-germanium structures for improved electrical device performance and for fundamental studies of epitaxial growth. (c) 2005 American Institute of Physics. C1 Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA. Univ Wisconsin, Mat Sci Program, Madison, WI 53706 USA. Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53706 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Evans, PG (reprint author), Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA. EM evans@engr.wisc.edu RI Evans, Paul/A-9260-2009 OI Evans, Paul/0000-0003-0421-6792 NR 21 TC 7 Z9 7 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 103501 DI 10.1063/1.1894579 PN 1 PG 5 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100024 ER PT J AU Fishman, RS Liu, SH AF Fishman, RS Liu, SH TI Broken local symmetry and the mode splitting of Y doped SmS in a magnetic field SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID SINGLET-GROUND-STATE; EXCITATIONS AB Recently, the observed mode splitting in doped Sm1-xYxS was explained by the local symmetry breaking produced by the Y impurities. A model with a random quantization axis m(i) successfully fit not only the observed mode frequencies of the J=0 -> 1 transitions but also their intensities, which depend strongly on wave vector. A magnetic field is now predicted to significantly alter the magnetic susceptibility and mode frequencies by mixing the J=0 and J=1 levels. The induced Sm moments form a canted structure, with each Sm spin rotated from the field direction towards the local quantization axis mi, thereby enhancing the Van Vleck susceptibility with increasing x. Due to the level splitting in a magnetic field, the mode frequencies of Sm1-xYxS will be broadened asymmetrically: at the (111) zone center (boundary), the lower mode will be significantly broadened (narrowed) compared to the upper mode. (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. RP Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RI Fishman, Randy/C-8639-2013 NR 14 TC 0 Z9 0 U1 0 U2 0 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 2005 VL 97 IS 10 AR 10A715 DI 10.1063/1.1853192 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300047 ER PT J AU Garcia-Sanchez, F Chubykalo-Fesenko, O Mryasov, ON Chantrell, RW Guslienko, KY AF Garcia-Sanchez, F Chubykalo-Fesenko, O Mryasov, ON Chantrell, RW Guslienko, KY TI Multiscale versus micromagnetic calculations of the switching field reduction in FePt/FeRh bilayers with perpendicular exchange spring SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETIC RECORDING MEDIA; PERMANENT-MAGNETS; FILMS AB Calculations of magnetisation reversal via a perpendicular exchange spring in soft-hard bilayers are presented using the example of an FePt/FeRh bilayer which has recently been proposed as an alternative medium for heat-assisted magnetic recording applications. We show that the standard three-dimensional micromagnetic model fails to describe the coercivity reduction due to the fact that at low interface exchange value, the domain wall penetration into the hard layer is not correctly described within the continuous approach. A multiscale model based on atomic level simulations near the interface and a micromagnetic approach far from it is proposed. This leads to improved calculations of the exchange spring at the interface, allowing a detailed study of the magnetisation reversal dynamics. As a result, the coercivity is found to saturate at an interfacial exchange value of 4% of the bulk value, the practical applications of which are discussed. In addition, the granular structure in an FePt medium with different intergrain exchange parameters is considered. (c) 2005 American Institute of Physics. C1 CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain. Seagate Res, Pittsburgh, PA 15222 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Garcia-Sanchez, F (reprint author), CSIC, Inst Ciencia Mat Madrid, Plaza Murillo 2, E-28049 Madrid, Spain. EM fgarcias@icmm.csic.es; oksana@icmm.csic.es RI Garcia-Sanchez, Felipe/F-8592-2012; Chantrell, Roy/J-9898-2015 OI Garcia-Sanchez, Felipe/0000-0002-3655-4836; Chantrell, Roy/0000-0001-5410-5615 NR 10 TC 9 Z9 9 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 2005 VL 97 IS 10 AR 10J101 DI 10.1063/1.1844931 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500018 ER PT J AU Geyer, RG Riddle, B Krupka, J Boatner, LA AF Geyer, RG Riddle, B Krupka, J Boatner, LA TI Microwave dielectric properties of single-crystal quantum paraelectrics KTaO3 and SrTiO3 at cryogenic temperatures SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRON-PARAMAGNETIC-RESONANCE; FERROELECTRIC PHASE-TRANSITIONS; COMPLEX PERMITTIVITY; X-RAY; INCIPIENT FERROELECTRICS; POTASSIUM TANTALATE; RANGE; STRONTIUM; KTA1-XNBXO3; TITANATES AB Microwave dielectric properties of single-crystal incipient quantum ferroelectrics, KTaO3 and SrTiO3, have been measured at cryogenic temperatures. Cylindrical specimens were used as TE0n1-mode and quasi-TE011-mode dielectric resonators at temperatures ranging from 4 to 300 K. Conductive losses of the measurement resonant structures were taken into account, both as a function of frequency and temperature, so that uncertainties in the evaluated dielectric losses were +/- 5%. The real permittivity was measured with an accuracy of +/- 0.5%. The evaluated real permittivities of KTaO3 and SrTiO3 exhibit no ferroelectric transition, and remain paraelectric down to 5 K, consistent with soft-mode stabilization. Dielectric loss tangent values of KTaO3 at 3 GHz were 4.2 x 10(-5) at 5.4 K, 8.9 x 10(-5) at 77 K, and 1.4 x 10(-4) at 300 K, while those of SrTiO3 were 3.4 x 10(-3) at 5.4 K, 2.4 x 10(-4) at 77 K, and 3.8 x 10(-4) at 300 K. Results of the complex permittivity measurements are compared with theoretical predictions from a modified Devonshire phenomenological model. (c) 2005 American Institute of Physics. C1 Natl Inst Stand & Technol, Boulder, CO 80305 USA. Inst Midroelekt & Optoelekt Politechn Warszawskie, PL-00662 Warsaw, Poland. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA. RP Geyer, RG (reprint author), Natl Inst Stand & Technol, Boulder, CO 80305 USA. EM geyer@boulder.nist.gov RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 31 TC 22 Z9 22 U1 1 U2 17 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 2005 VL 97 IS 10 AR 104111 DI 10.1063/1.1905789 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100110 ER PT J AU Gonzalez-Debs, M Cederberg, JG Biefeld, RM Kuech, TF AF Gonzalez-Debs, M Cederberg, JG Biefeld, RM Kuech, TF TI Photoluminescence studies on Al and Ga interdiffusion across (Al,Ga)Sb/GaSb quantum well interfaces SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SELF-DIFFUSION; ALLOYS; HETEROSTRUCTURES; LAYERS AB The thermal interdiffusion of AlSb/GaSb multiquantum wells was measured and the intrinsic diffusivities of Al and Ga determined over a temperature range of 823-948 K for 30-9000 s. The 77-K photoluminescence (PL) was used to monitor the extent of interdiffusion through the shifts in the superlattice luminescence peaks. The chemical diffusion coefficient was quantitatively determined by fitting the observed PL peak shifts to the solution of the Schrodinger equation, using a potential derived from the solution of the diffusion equation. The value of the interdiffusion coefficient ranged from 5.2 X 10(-4) to 0.06 nm(2)/s over the conditions studied and was characterized by an activation energy of 3.0 +/- 0.1 eV. The intrinsic diffusion coefficients for Al and Ga were also determined with higher values for Al than for Ga, described by activation energies of 2.8 +/- 0.4 and 1.1 +/- 0.1 eV, respectively. (c) 2005 American Institute of Physics. C1 Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. RP Kuech, TF (reprint author), Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA. EM kuech@engr.wisc.edu RI Gonzalez Debs, Mariam/B-6494-2014 OI Gonzalez Debs, Mariam/0000-0002-8250-4506 NR 35 TC 0 Z9 0 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 102522 DI 10.1063/1.1900286 PN 1 PG 8 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100045 ER PT J AU Griffin, KA Pakhomov, AB Wang, CM Heald, SM Krishnan, KM AF Griffin, KA Pakhomov, AB Wang, CM Heald, SM Krishnan, KM TI Cobalt-doped anatase TiO2: A room temperature dilute magnetic dielectric material SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID ELECTRICAL SPIN INJECTION; EPITAXIAL-GROWTH; FERROMAGNETIC SEMICONDUCTORS; FILMS AB We experimentally investigate the room temperature ferromagnetism observed in insulating Co doped anatase TiO2 thin films grown by sputter deposition. The Co was uniformly incorporated in the lattice as Co(II) with no evidence of Co metal. A series of annealing treatments were carried out to optimize the ferromagnetic ordering and a saturation moment of 1.1 mu(B)/Co atom at 300 K was obtained with UHV annealing at 450 degrees C. Both as-deposited and annealed films were highly insulating at room temperature. Results show that the ferromagnetism is strongly dependent on the number and distribution of oxygen vacancies in the Co:TiO2 lattice. (c) 2005 American Institute Of Physics. C1 Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. RP Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. EM kannanmk@u.washington.edu NR 23 TC 34 Z9 34 U1 0 U2 7 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 2005 VL 97 IS 10 AR 10D320 DI 10.1063/1.1853311 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300213 ER PT J AU Guan, Y Dios, Z Arena, DA Cheng, L Bailey, WE AF Guan, Y Dios, Z Arena, DA Cheng, L Bailey, WE TI Transmission-mode x-ray magnetic circular dichroism characterization of moment alignment in Tb-doped Ni81Fe19 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB We present transmission-mode XMCD characterization of Fe, Ni, and Tb moment alignment in Tb-doped Ni81Fe19 thin films. The use of transmission geometry measurements has allowed the extraction of absolute projected elemental moments in the alloy. A very low projected Tb moment at 6% doping level, which nonetheless reverses with low applied fields (40 Oe), indicates a sperimagnetic alignment with respect to the Fe and Ni elements in the cosputtered polycrystalline alloy. (c) 2005 American Institute of Physics. C1 Columbia Univ, Dept Appl Phys & Appl Math, Mat Sci Program, New York, NY 10027 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Guan, Y (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, Mat Sci Program, New York, NY 10027 USA. NR 9 TC 11 Z9 11 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A719 DI 10.1063/1.1856732 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300051 ER PT J AU Guslienko, KY Pishko, V Novosad, V Buchanan, K Bader, SD AF Guslienko, KY Pishko, V Novosad, V Buchanan, K Bader, SD TI Quantized spin excitation modes in patterned ferromagnetic stripe arrays SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID WIRES AB The high-frequency dynamic properties of patterned ferromagnetic microstripe arrays were studied using ferromagnetic resonance (FMR). The samples were fabricated by means of electron-beam lithography and magnetron sputtering followed by liftoff. The 20 nm thick and 1 mu m wide stripes were arranged into a regular array with a period of 2 Am. The resonance spectra were taken at a fixed frequency of 9.38 GHz for different sample orientations with respect to the applied field. In the case of perpendicularly magnetized stripes, a set of multiple resonance peaks is observed below the main FMR peak. A quantitative description of the observed spectra is given using a dipolar-exchange spin-wave dispersion equation. The calculations are in agreement with the experimental data. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Inst Low Temp, UA-61103 Kharkov, Ukraine. RP Guslienko, KY (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gusliyenko@anl.gov RI Bader, Samuel/A-2995-2013; Novosad, Valentyn/C-2018-2014; Novosad, V /J-4843-2015; OI Buchanan, Kristen/0000-0003-0879-0038 NR 11 TC 6 Z9 6 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A709 DI 10.1063/1.1850364 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300041 ER PT J AU Han, M Snyder, JE Tang, W Lograsso, TA Schlagel, DL Jiles, DC AF Han, M Snyder, JE Tang, W Lograsso, TA Schlagel, DL Jiles, DC TI Magnetic anisotropy and phase transitions in single-crystal Tb-5(Si2.2Ge1.8) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB The Tb-5(SixGe4-x) alloy system has many features in common with the Gd-5(SixGe4-x) system although it has a more complex magnetic and structural phase diagram. This paper reports on the magnetic anisotropy and magnetic phase transition of single-crystal Tb-5(Si2.2Ge1.8) which has been investigated by the measurements of M-H and M-T along the a, b, and c axes. The variation of 1/chi vs T indicates that there is a transition from paramagnetic to ferromagnefic at T-c= 110 K. Below this transition temperature M-H curves show very strong anisotropy, and it is believed that this is due to the complex spin configuration. M-H measurements at T= 110 K show that the a axis is the easy axis, and that the saturation magnetization is 200 emu/g. The b axis is the hard axis, which needs an external magnetic field much higher than 2 T to saturate the magnetization in that direction, indicating a high magnetocrystalline anisotropy. The c axis is of intermediate hardness. The magnetic properties of this material are therefore very different from those of the related Gd5Si2Ge2 system, in which the b axis was found to be the easy axis and the magnitude of the anisotropy was smaller. (c) 2005 American Institute of Physics. C1 Iowa State Univ, US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Han, M (reprint author), Iowa State Univ, US DOE, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. NR 12 TC 2 Z9 2 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10M313 DI 10.1063/1.1855196 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500139 ER PT J AU He, JQ Jia, CL Vaithyanathan, V Schlom, DG Schubert, J Gerber, A Kolhstedt, HH Wang, RH AF He, JQ Jia, CL Vaithyanathan, V Schlom, DG Schubert, J Gerber, A Kolhstedt, HH Wang, RH TI Interfacial reaction in the growth of epitaxial SrTiO3 thin films on (001) Si substrates SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-BEAM EPITAXY; SRTIO3/SI(001) HETEROJUNCTIONS; STRONTIUM-TITANATE; GATE DIELECTRICS; BUFFER LAYERS; IN-SITU; SILICON; OXIDES; SI(001); MICROSTRUCTURE AB The SrTiO3/Si interface was investigated by transmission electron microscopy for SrTiO3 films grown on (001) Si by molecular-beam epitaxy with different native oxide (SiO2) removal treatments, and Sr/Ti flux ratios. The interface and film microstructure were independent of the process used to remove the native oxide, but the interface reactivity was dependent on the Sr/Ti flux ratio. A low Sr/Ti flux ratio (similar to 0.8) resulted not only in a layer of amorphous material at the film/substrate interface but also in the formation of crystalline C49 TiSi2 precipitates at that interface. These results are consistent with thermodynamic expectations in which it is paramount to maintain separation between TiO2 and the underlying silicon. (c) 2005 American Institute of Physics. C1 Forschungszentrum Julich Gesell Beschrankter Haft, Inst Festkorperforsch, D-52425 Julich, Germany. Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. Forschungszentrum Julich Gesell Beschrankter Haft, Inst Schichten & Grenzflachen, D-52425 Julich, Germany. Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China. Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China. RP He, JQ (reprint author), Brookhaven Natl Lab, Dept Biol, 50 Bell Ave, Upton, NY 11973 USA. EM jhe@bnl.gov RI He, Jiaqing/A-2245-2010; Schlom, Darrell/J-2412-2013; Schubert, Jurgen/K-9543-2013 OI Schlom, Darrell/0000-0003-2493-6113; Schubert, Jurgen/0000-0003-0185-6794 NR 43 TC 20 Z9 21 U1 0 U2 17 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 2005 VL 97 IS 10 AR 104921 DI 10.1063/1.1915519 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100183 ER PT J AU He, JQ Vasco, E Jia, CL Dittmann, R Wang, RH AF He, JQ Vasco, E Jia, CL Dittmann, R Wang, RH TI Microstructure of epitaxial Ba0.7Sr0.3TiO3/SrRuO3 bilayer films on SrTiO3 substrates SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID BA0.5SR0.5TIO3 THIN-FILMS; DIELECTRIC-PROPERTIES; (BA,SR)TIO3 FILMS; INTERNAL-STRESSES; CAPACITORS; DEPOSITION; GROWTH; LAALO3 AB The thickness evolution of the microstructure of epitaxial Ba0.7Sr0.3TiO3 thin films grown on SrRuO3/SrTiO3 was investigated by means of transmission electron microscopy. Within the Ba0.7Sr0.3TiO3 layer, a layered structure (three sublayers) is distinguished as for the configuration of lattice strain and defects. The first sublayer extends for 3 nm from the lattice-coherent Ba0.7Sr0.3TiO3/SrRUO3 interface. The second 13-nm-thick sublayer forms a semicoherent interface with the first sublayer due to the creation of a misfit dislocation network. The third sublayer extends beyond the second sublayer exhibiting a structure characterized by compact columnar features. Planar defects are formed at the boundaries between such features. The formation of a layered structure within the Ba0.7Sr0.3TiO3 films is discussed in the light of the growth modes of films on lattice-mismatched substrates. (c) 2005 American Institute of Physics. C1 Forschungszentrum Julich GmbH, Inst Festkorperforsch, D-52425 Julich, Germany. Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China. Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China. RP He, JQ (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. EM jhe@bnl.gov RI He, Jiaqing/A-2245-2010; Dittmann, Regina/J-9458-2013 OI Dittmann, Regina/0000-0003-1886-1864 NR 18 TC 7 Z9 7 U1 0 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 104907 DI 10.1063/1.1897067 PN 1 PG 5 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100169 ER PT J AU Jiang, JS Pearson, JE Liu, ZY Kabius, B Trasobares, S Miller, DJ Bader, SD Lee, DR Haskel, D Srajer, G Liu, JP AF Jiang, JS Pearson, JE Liu, ZY Kabius, B Trasobares, S Miller, DJ Bader, SD Lee, DR Haskel, D Srajer, G Liu, JP TI A new approach for improving exchange-spring magnets SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID PERMANENT-MAGNETS; FILMS; MAGNETIZATION; ANISOTROPY AB It is demonstrated here that an already ideal exchange-spring magnet can be further improved by intermixing the interface. This is counter-intuitive to the general expectation that optimal exchange-spring magnet behavior requires an ideal, atomically coherent soft-hard interface. Epitaxial SmCo/Fe thin-film exchange-spring bilayers are thermally processed, by annealing or high-temperature deposition, to induce interdiffusion. With increasing processing temperature, the hysteresis loop becomes more single-phase-like, yet the magnetization remains fully reversible. The interface is characterized via synchrotron x-ray scattering and electron microscopy elemental mapping. The magnetization behavior is modeled by assuming a graded interface where the material parameters vary continuously. The simulations produce demagnetization curves similar to experimental observations. (c) 2005 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Univ Texas, Dept Phys, Arlington, TX 76109 USA. RP Jiang, JS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Bader, Samuel/A-2995-2013; Trasobares, Susana/H-5282-2015 OI Trasobares, Susana/0000-0003-3820-4327 NR 12 TC 51 Z9 52 U1 0 U2 24 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 2005 VL 97 IS 10 AR 10K311 DI 10.1063/1.1855032 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500116 ER PT J AU Jung, MH Alsmadi, AM Chang, S Fitzsimmons, MR Zhao, Y Lacerda, AH Kawanaka, H El-Khatib, S Nakotte, H AF Jung, MH Alsmadi, AM Chang, S Fitzsimmons, MR Zhao, Y Lacerda, AH Kawanaka, H El-Khatib, S Nakotte, H TI Magnetic ordering in single-crystalline SrLaFeO4 and Sr1.1La0.9FeO4 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID LASRFEO4 AB We report on the magnetic properties of single-crystalline SrLaFeO4 and Sr1.1La0.9FeO4. Both compounds crystallize in the tetragonal K2NiF4 structure (14/mmm) with the La and Sr atoms randomly distributed over the 4e crystallographic sites of this structure. SrLaFeO4 orders antiferromagnetically below 350 K, and Sr1.1La(0.9)FeO(4), orders antiferromagnetically at about 150 K. Both compounds exhibit magnetic structures described by orthorhombic Cmca-type symmetry and two magnetic propagation vectors q(1)=(1/2,1/2,0) and q(2)=(-1/2,1/2,0), representing the two possible magnetic domains. A collinear antiferromagnetic arrangement of the Fe3+ moments confined to the tetragonal basal plane is found. Bulk magnetic studies on SrLaFeO4 show that the properties of this compound are highly anisotropic, and there is evidence for additional magnetic transitions at lower temperatures (30 and 90 K). Low-temperature neutron diffraction data were taken to gain some insight into the nature of these transitions. (c) 2005 American Institute of Physics. C1 Korea Basic Sci Inst, MST, Taejon 305333, South Korea. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Hashemite Univ, Dept Phys, Zarqa 13115, Jordan. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Los Alamos Natl Lab, Los Alamos Neutron Scattering Ctr, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, NHMFL, Pulse Field Facil, Los Alamos, NM 87545 USA. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA. RP Alsmadi, AM (reprint author), Korea Basic Sci Inst, MST, Taejon 305333, South Korea. EM alsmadi@anl.gov RI Lujan Center, LANL/G-4896-2012 NR 12 TC 5 Z9 5 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A926 DI 10.1063/1.1861416 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300081 ER PT J AU Kang, K Lewis, LH Moodenbaugh, AR AF Kang, K Lewis, LH Moodenbaugh, AR TI Crystal structure and magnetic properties of MnBi-Bi nanocomposite SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID FILMS AB Isolated NiAs-type MnBi nanoparticles of 10 nm diameter, embedded in a Bi matrix, were fabricated by melt-spinning and then annealing at 528 K for 1 h. A large coercivity, over 16 kOe at 300 K, with a positive temperature coefficient is observed. In agreement with bulk results, ac susceptibility measurements show a spin reorientation around 90 K coincident with an abrupt decrease in the coercivity with decreasing temperature. The high coercivity at 300 K is attributed to a mixture of nucleation and pinning mechanisms for magnetic reversal. (c) 2005 American Institute of Physics. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. RP Kang, K (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. EM kkang@bnl.gov OI Moodenbaugh, Arnold/0000-0002-3415-6762 NR 10 TC 11 Z9 11 U1 6 U2 20 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 2005 VL 97 IS 10 AR 10K302 DI 10.1063/1.1847058 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500107 ER PT J AU Krieble, K Schaeffer, T Paulsen, JA Ring, AP Lo, CCH Snyder, JE AF Krieble, K Schaeffer, T Paulsen, JA Ring, AP Lo, CCH Snyder, JE TI Mossbauer spectroscopy investigation of mn-substituted co-ferrite (CoMnxFe2-xO4) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID THIN-FILMS; SPINEL AB Understanding the effect of Mn substitution for Fe in Co ferrite presents a challenge because there are three different transition-metal ions distributed among two distinct crystallographic and magnetic sublattices with complicated superexchange and anisotropic interactions. In this study, a series of six powder samples with compositions Co1.0MnxFe2-xO4 were investigated using transmission Mossbauer spectroscopy. Mossbauer spectroscopy provides an excellent tool for probing the local environment of the Fe atoms present in such materials. Results show two sets of six-line hyperfine patterns for all samples, indicating the presence of Fe in both A and B sites. Identification of sites is accomplished by evidence from hyperfine distribution width, integrated intensity, and isomer-shift data. Increasing Mn concentration was found to decrease the hyperfine field strength at both sites, but at unequal rates, and to increase the distribution width. This effect is due to the relative strengths of Fe-O-X superexchange (X=Fe, Co, or Mn) and the different numbers of the next-nearest neighbors of A and B sites. Results are consistent with a model of Mn substituting into B sites and displacing Co ions onto A sites. (c) 2005 American Institute of Physics. C1 Moravian Coll, Bethlehem, PA 18018 USA. Iowa State Univ, Ctr Nondestruct Evaluat, Ames, IA 50011 USA. Iowa State Univ, Mat & Engn Phys Program, Ames Lab, US Dept Energy, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Krieble, K (reprint author), Moravian Coll, Bethlehem, PA 18018 USA. EM krieblek@moravian.edu NR 10 TC 41 Z9 41 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10F101 DI 10.1063/1.1846271 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300282 ER PT J AU Lau, JW Beleggia, M Schofield, MA Neumark, GF Zhu, Y AF Lau, JW Beleggia, M Schofield, MA Neumark, GF Zhu, Y TI Direct correlation of reversal rate dynamics to domain configurations in micron-sized permalloy elements SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETIZATION REVERSAL; WALLS AB The distribution of states upon the removal of applied magnetic field in an array of 7.5 X 7.5 mu m(2) permalloy square elements, as observed by transmission electron microscopy in Lorentz mode, shows a predominance of two states: the vortex state and the seven-domain state. The distributional dependence of these two states on the rate of change of the reversal field is established. Micromagnetic simulations suggest that vortex nucleation and the subsequent domain-wall propagation are the two primary mechanisms for magnetization reversal. The kinetics of the two pathways is examined in a manner that conforms to the observed distribution of states. (c) 2005 American Institute of Physics. C1 Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Lau, JW (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. EM lau@bnl.gov RI Lau, June/C-7509-2013; OI Beleggia, Marco/0000-0002-2888-1888 NR 14 TC 6 Z9 6 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10E702 DI 10.1063/1.1851731 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300279 ER PT J AU Lee, YB Kim, JW Goldman, AI Harmon, BN AF Lee, YB Kim, JW Goldman, AI Harmon, BN TI X-ray resonant magnetic scattering and x-ray magnetic circular dichroism branching ratios, L-3/L-2, for heavy rare earths SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID SUM-RULE; GADOLINIUM; EXCHANGE; METALS AB In this study we have used first principles electronic structure methods to investigate the detailed contributions to the L-3/L-2 branching ratio in the heavy rare earth elements. The calculations use the full potential, relativistic, linear augmented plane wave method with the LSDA+U approach for consideration of the local 4f electronic orbitals. With no spin orbit coupling (SOC) in the conducting bands, and with the same radial function for the 2p(3/2) and 2p(1/2) core states, the branching ratio (BR) is exactly 1:-1 for the x-ray magnetic circular dichroism spectra of the ferromagnetic heavy rare earth metals. However, with full SOC the BR ranges from 1.5 to 6.0 in going from Gd to Er. The energy and spin dependence of the 5d radial functions are important. The results point to problems with modified atomic models which have been proposed to explain the BR. Recent x-ray resonant magentic scattering experiments on (Gd,Tb,Dy,Ho,Er,Tm)Ni2Ge2 are discussed. (c) 2005 American Institute of Physics. C1 Iowa State Univ, Ames Lab, US Dept Energy, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Lee, YB (reprint author), Iowa State Univ, Ames Lab, US Dept Energy, Ames, IA 50011 USA. EM yblee@iastate.edu NR 18 TC 5 Z9 5 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A311 DI 10.1063/1.1852212 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300012 ER PT J AU McQueeney, RJ Yethiraj, M Montfrooij, W Gardner, JS Metcalf, P Honig, JM AF McQueeney, RJ Yethiraj, M Montfrooij, W Gardner, JS Metcalf, P Honig, JM TI Influence of the Verwey transition on the spin-wave dispersion of magnetite SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID EXCHANGE CONSTANTS; LOW-TEMPERATURES; FERRITES; FE3O4 AB Inelastic neutron-scattering measurements of the spin-wave spectrum of magnetite (Fe(3)O(4)) that shed new light on the Verwey transition problem are presented. Above the Verwey transition, the spin waves can fit a simple Heisenberg model. Below T(v), a large gap (8 meV) forms in the acoustic spin-wave branch at q=(0,0, 1/2) and E=43 meV. Heisenberg models with large unit cells were used to examine the spin waves when the superexchange is modified to reflect the crystallographic symmetry lowering due to either atomic distortions or charge ordering and find that neither of these models predicts the spin-wave gap. (c) 2005 American Institute of Physics. C1 Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Oak Ridge Natl Lab, Ctr Neutron Scattering, Oak Ridge, TN 37831 USA. Univ Missouri, Dept Phys, Columbia, MO 65211 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11793 USA. NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA. RP McQueeney, RJ (reprint author), Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. EM mcqueeney@ameslab.gov RI Gardner, Jason/A-1532-2013; McQueeney, Robert/A-2864-2016 OI McQueeney, Robert/0000-0003-0718-5602 NR 13 TC 4 Z9 4 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A902 DI 10.1063/1.1846555 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300057 ER PT J AU Mertens, DC Montfrooij, W McQueeney, RJ Yethiraj, M Honig, JM AF Mertens, DC Montfrooij, W McQueeney, RJ Yethiraj, M Honig, JM TI The role of grain boundaries in determining the transport properties of magnetite SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID VERWEY TRANSITION; MAGNETORESISTANCE; FE3O4; TEMPERATURE AB We present magnetoresistance and Hall-effect measurements on single-crystal magnetite (Fe(3)O(4)) close to the Verwey transition T(V)=123.8 K. We show that the formation of grain boundaries accompanying the reduction in crystal symmetry plays a significant role in the electron-scattering mechanism, and that grain boundaries can account for the apparent change in sign of the charge carriers below T(V). (c) 2005 American Institute of Physics. C1 Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA. Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. Oak Ridge Natl Lab, Ctr Neutron Scattering, Oak Ridge, TN 37831 USA. Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA. RP Mertens, DC (reprint author), Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA. EM dcm59e@mizzou.edu RI McQueeney, Robert/A-2864-2016 OI McQueeney, Robert/0000-0003-0718-5602 NR 15 TC 5 Z9 5 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A303 DI 10.1063/1.1846371 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300004 ER PT J AU Petculescu, G Hathaway, KB Lograsso, TA Wun-Fogle, M Clark, AE AF Petculescu, G Hathaway, KB Lograsso, TA Wun-Fogle, M Clark, AE TI Magnetic field dependence of galfenol elastic properties SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID FE-GA; ALLOYS; MAGNETOELASTICITY AB Elastic shear moduli measurements on Fe100-xGax (x=12-33) single crystals (via resonant ultrasound spectroscopy) with and without a magnetic field and within 4-300 K are reported. The pronounced softening of the tetragonal shear modulus c' is concluded to be, based on magnetoelastic coupling, the cause of the second peak in the tetragonal magnetostriction constant X 100 near x=28. Exceedingly high Delta E effects (similar to 25%), combined with the extreme softness in c' (c'< 10 GPa), suggest structural changes take place, yet, gradual in nature, as the moduli show a smooth dependence on Ga concentration, temperature, and magnetic field. Shear anisotropy (C-44/c') as high as 14.7 was observed for Fe71.2Ga28.8. (c) 2005 American Institute of Physics. C1 Univ Mississippi, University, MS 38677 USA. Off Naval Res, Arlington, VA 22217 USA. Ames Lab, Ames, IA 50011 USA. USN, Ctr Surface Warfare, Bethesda, MD 20817 USA. Clark Associates, Adelphi, MD 20783 USA. RP Petculescu, G (reprint author), Univ Mississippi, University, MS 38677 USA. EM g-petculescu@northwestern.edu NR 8 TC 45 Z9 45 U1 2 U2 24 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 2005 VL 97 IS 10 AR 10M315 DI 10.1063/1.1855711 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500141 ER PT J AU Puzic, A Van Waeyenberge, B Chou, KW Fischer, P Stoll, H Schutz, G Tyliszczak, T Rott, K Bruckl, H Reiss, G Neudecker, I Haug, T Buess, M Back, CH AF Puzic, A Van Waeyenberge, B Chou, KW Fischer, P Stoll, H Schutz, G Tyliszczak, T Rott, K Bruckl, H Reiss, G Neudecker, I Haug, T Buess, M Back, CH TI Spatially resolved ferromagnetic resonance: Imaging of ferromagnetic eigenmodes SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETIZATION DYNAMICS AB Fast magnetization dynamics of ferromagnetic elements on sub-micron length scales is currently attracting substantial scientific interest. Studying the ferromagnetic eigenmodes in such systems provides valuable information in order to trace back the dynamical response to the underlying micromagnetic properties. The inherent time structure of third generation synchrotron sources allows for time-resolved imaging (time resolution: 70-100 ps) of magnetization dynamics at soft x-ray microscopes (lateral resolution down to 20 nm). Stroboscopic pump-and-probe experiments were performed on micron-sized Permalloy samples at a full-field magnetic transmission x-ray microscope (XM-1, beamline 6.1.2) at the ALS at Berkeley, CA. Complementary to these time-domain experiments a frequency-domain "spatially resolved ferromagnetic resonance" (SR-FMR) technique was applied to magnetic x-ray microscopy. In contrast to time-domain measurements which reflect a broadband excitation of the magnetization, the frequency-domain SR-FMR technique allows for detailed studies of specific ferrornagnetic eigenmodes. First SR-FMR experiments at a scanning x-ray transmission microscope (STXM, ALS, BL 11.0.2) are reported. The sample, a 1 X 1 mu m(2) Permalloy pattern, was excited by an alternating magnetic field with a frequency of 250 MHz. By varying the phase relation between the sine excitation and the x-ray flashes of the synchrotron, the dynamics of a vortex motion eigenmode was investigated in time and space. (c) 2005 American Institute of Physics. C1 Max Planck Inst Met Res, D-70569 Stuttgart, Germany. LBNL, Div Chem Sci, Berkeley, CA 94720 USA. Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany. Univ Regensburg, D-93053 Regensburg, Germany. RP Puzic, A (reprint author), Max Planck Inst Met Res, D-70569 Stuttgart, Germany. RI Fischer, Peter/A-3020-2010; Back, Christian/A-8969-2012; Reiss, Gunter/A-3423-2010 OI Fischer, Peter/0000-0002-9824-9343; Back, Christian/0000-0003-3840-0993; Reiss, Gunter/0000-0002-0918-5940 NR 6 TC 49 Z9 49 U1 1 U2 22 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 2005 VL 97 IS 10 AR 10E704 DI 10.1063/1.1860971 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300281 ER PT J AU Rao, S Della Torre, E Bennett, LH Seyoum, HM Watson, RE AF Rao, S Della Torre, E Bennett, LH Seyoum, HM Watson, RE TI Temperature variation of the fluctuation field in Co/Pt SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETIC VISCOSITY AB Measurements of the fluctuation field of a perpendicular Co/Pt multilayer medium was carried out from 4 K to room temperature, using a procedure that for each holding field matches, in log-time, the aftereffect curve with the major loop. This is done by translation and scaling using the entire curve. The fluctuation field at each temperature is obtained from the slope of the required translation as a function of the holding field. The fluctuation field is directly proportional to the absolute temperature below the Bose condensation temperature, T-BE, has a sharp peak at the T-BE, then decreases until it approaches a constant value asymptotically from below for higher temperatures. This paper presents both the technique used to obtain this data and a theory of this magnetic aftereffect. (c) 2005 American Institute of Physics. C1 George Washington Univ, Elect & Comp Engn Dept, Washington, DC 20052 USA. NIST, Gaithersburg, MD 20899 USA. W Virginia State Coll, Dept Phys, Institute, WV 25112 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Rao, S (reprint author), George Washington Univ, Elect & Comp Engn Dept, Washington, DC 20052 USA. NR 10 TC 10 Z9 10 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10N113 DI 10.1063/1.1853232 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500184 ER PT J AU Roberts, BK Pakhomov, AB Shutthanandan, VS Krishnan, KM AF Roberts, BK Pakhomov, AB Shutthanandan, VS Krishnan, KM TI Ferromagnetic Cr-doped ZnO for spin electronics via magnetron sputtering SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID P-TYPE ZNO; ELECTRIC PROPERTIES; THIN-FILMS; SEMICONDUCTORS; TRANSITION; OXIDE C1 Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. RP Roberts, BK (reprint author), Univ Washington, Dept Mat Sci & Engn, Box 352120, Seattle, WA 98195 USA. EM Kannanmk@u.washington.edu NR 19 TC 67 Z9 68 U1 1 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10D310 DI 10.1063/1.1847914 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300203 ER PT J AU Rosen, J Anders, A Mraz, S Schneider, JM AF Rosen, J Anders, A Mraz, S Schneider, JM TI Charge-state-resolved ion energy distributions of aluminum vacuum arcs in the absence and presence of a magnetic field SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CATHODIC ARC; PLASMA-JET; REGION; FLUX; FLUCTUATIONS; VELOCITIES; TRANSPORT; AMBIENT; DUCT AB The charge-state-resolved ion energy distributions (IEDs) of aluminum vacuum are plasma species were measured and analyzed for different geometric and magnetic field configurations. The IEDs were fitted by shifted Maxwellian distributions. Plasma expansion in the absence of a magnetic field showed higher ion energies for higher charge states. The introduction of a magnetic field (independent of geometric configuration) resulted in a broader distribution and increased average ion energies. The energy gain was approximately proportional to the charge state, which may be due to the presence of electric fields in the magnetized plasma. The evolution of ion energy distributions is relevant to thin-film growth, and it is shown that the IEDs can be modified by suitable magnetic field configurations. (c) 2005 American Institute of Physics. C1 Univ Aachen, RWTH, D-52056 Aachen, Germany. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Rosen, J (reprint author), Univ Aachen, RWTH, D-52056 Aachen, Germany. RI Schneider, Jochen/A-4701-2012; Rosen, Johanna/M-9284-2014; Anders, Andre/B-8580-2009 OI Anders, Andre/0000-0002-5313-6505 NR 35 TC 24 Z9 26 U1 1 U2 6 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 2005 VL 97 IS 10 AR 103306 DI 10.1063/1.1906291 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100020 ER PT J AU Samolyuk, GD Antropov, VP AF Samolyuk, GD Antropov, VP TI Exchange coupling in pure hcp Gd and magnetostructural transition in Gd-5(Si2Ge2) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID ELECTRONIC-STRUCTURE AB The electronic structure and magnetic properties of Gd and Gd-5(Si2Ge2) systems were studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation was implemented and Curie temperature was calculated in pure Gd. The decrease of exchange coupling in Gd-5(Si2Ge2) through structural transformation leads to first-order magnetostructural phase transition with large value of vertical bar partial derivative H/partial derivative T vertical bar and giant magnetocaloric effect. (c) 2005 American Institute of Physics. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Samolyuk, GD (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM samolyuk@ameslab.gov NR 10 TC 10 Z9 10 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A310 DI 10.1063/1.1851693 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300011 ER PT J AU Shiratsuchi, Y Endo, Y Yamamoto, M Bader, SD AF Shiratsuchi, Y Endo, Y Yamamoto, M Bader, SD TI Effect of substrate inclination on the magnetic anisotropy of ultrathin Fe films grown on Al2O3(0001) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID TRANSITION; STATE AB We have investigated the effect of substrate inclination on the in-plane magnetic anisotropy of ultrathin Fe films grown on Al2O3(0001). For Fe films grown on flat Al2O3 substrates, no preferred direction of magnetization exists in the film plane due to the three equivalent epitaxial orientations of Fe(110) that form. However, for Fe grown on an inclined Al2O3 substrate, a uniaxial anisotropy appears that is parallel to the step edges. The anisotropy increases in magnitude with decreasing Fe thickness and growth temperature, and as the surface morphology changes from being rough to being smooth. We attribute the uniaxial anisotropy to the effective demagnetization field caused by the surface corrugation. (c) 2005 American Institute of Physics. C1 Osaka Univ, Grad Sch Engn, Dept Mat Sci & Engn, Suita, Osaka 5650871, Japan. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Shiratsuchi, Y (reprint author), Osaka Univ, Grad Sch Engn, Dept Mat Sci & Engn, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan. EM shiratsuchi@mat.eng.osaka-u.ac.jp RI Bader, Samuel/A-2995-2013; Endo, Yasushi/E-8962-2016 NR 13 TC 11 Z9 11 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10J106 DI 10.1063/1.1850075 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500023 ER PT J AU Song, SH Jiles, DC Snyder, JE Pecharsky, AO Wu, D Dennis, KW Lograsso, TA McCallum, RW AF Song, SH Jiles, DC Snyder, JE Pecharsky, AO Wu, D Dennis, KW Lograsso, TA McCallum, RW TI Thermal expansion and Gruneisen parameters in some Pr-Ni-Si compounds SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB In this study, the thermal expansion and Gruneisen parameter of polycrystalline "Pr5Ni2S3" and "Pr15Ni7S10" were investigated over the temperature range of 5-300 K. Calculations of the phonon contribution to thermal expansion were made, which allowed the magnetic contribution to thermal expansion to be calculated from the difference between the total thermal expansion and the phonon contribution. This resulted in a temperature-dependent magnetic contribution to thermal expansion that varied with the magnetic ordering of the material. The results show two magnetic transitions in each compound, the higher temperature transition corresponding to the Curie temperature and the lower temperature transition resulting from a spin reorientation. (c) 2005 American Institute Of Physics. C1 Iowa State Univ, US Dept Energy, Mat & Engn Phys Program, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Song, SH (reprint author), Iowa State Univ, US Dept Energy, Mat & Engn Phys Program, Ames Lab, Ames, IA 50011 USA. EM song73@iastate.edu NR 5 TC 3 Z9 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10M516 DI 10.1063/1.1853894 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500163 ER PT J AU Srinath, S Frey, NA Heindl, R Srikanth, H Coffey, KR Dudney, NJ AF Srinath, S Frey, NA Heindl, R Srikanth, H Coffey, KR Dudney, NJ TI Growth and characterization of sputtered BSTO/BaM multilayers SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID THIN-FILM MEDIA; COMPLEX PERMEABILITY; MICROWAVE PROPERTIES; MAGNETIC-PROPERTIES; HEXAGONAL FERRITES; BA; POLARIZATION; HEXAFERRITE AB Multilayers of Ba0.5Sr0.5TiO3 (BSTO) and BaFe12O19 (BaM), with tunable permeability and permittivity are attractive systems for radio frequency and microwave applications. We have grown multilayers of BSTO and BaM using magnetron sputtering on Al2O3 substrates. Film growth conditions such as sputtering parameters were optimized to obtain high quality multilayers. X-ray diffraction established that both BSTO and BaM were formed and cross-sectional SEM studies showed sharp interfaces between BSTO and BaM layers. Magnetization showed a large coercivity (similar to 2000 Oe) consistent with the hexaferrite component. The hysteresis loops also revealed the distinct influence of magnetocrystalline and shape anisotropies at different temperatures. (c) 2005 American Institute of Physics. C1 Univ S Florida, Dept Phys, Tampa, FL 33620 USA. Univ Cent Florida, AMPAC, Orlando, FL 33620 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Srikanth, H (reprint author), Univ S Florida, Dept Phys, Tampa, FL 33620 USA. EM sharihar@cas.usf.edu RI Dudney, Nancy/I-6361-2016 OI Dudney, Nancy/0000-0001-7729-6178 NR 17 TC 12 Z9 13 U1 2 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 2005 VL 97 IS 10 AR 10J115 DI 10.1063/1.1853874 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500032 ER PT J AU Stadler, S Minott, DH Harley, D Craig, JP Khan, M Dubenko, II Ali, N Story, K Dvorak, J Idzerda, YU Arena, DA Harris, VG AF Stadler, S Minott, DH Harley, D Craig, JP Khan, M Dubenko, II Ali, N Story, K Dvorak, J Idzerda, YU Arena, DA Harris, VG TI Element-specific magnetic properties of Co2MnSi thin films SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID HALF-METALLIC FERROMAGNETS; HEUSLER ALLOY-FILMS; TRANSPORT-PROPERTIES; CIRCULAR-DICHROISM; GROWTH AB Co2MnSi thin films were grown on Al2O3 (a plane) and GaAs (001) substrates and on thin silicon nitride windows using pulsed laser deposition. Angle-dependent magneto-optic Kerr effect measurements reveal both a uniaxial and a fourfold magnetocrystalline anisotropy for films grown on GaAs (001). X-ray magnetic circular dichroism spectra were measured at the L-2,L-3 edges of the thin films as a function of aluminum cap layer thickness, and transmission mode L-2,L-3 x-ray absorption through a 1000-angstrom Co2MnSi film grown on a silicon nitride membrane were measured, indicating that deviations from metalliclike spectra are likely due oxidation or contamination. Element-specific moments for Co and Mn were calculated from the X-ray magnetic circular dichroism data of a nonoxidized film. (c) 2005 American Institute of Physics. C1 So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA. Montana State Univ, Dept Phys & Astron, Bozeman, MT 59717 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA. RP So Illinois Univ, Dept Phys, Neckers 483A, Carbondale, IL 62901 USA. EM sstadler@physics.siu.edu RI Harris, Vincent/A-8337-2009; Dubenko, Igor/A-4219-2012 NR 22 TC 9 Z9 9 U1 0 U2 4 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 2005 VL 97 IS 10 AR 10C302 DI 10.1063/1.1847391 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300121 ER PT J AU Tang, W Wu, YQ Dennis, KW Kramer, MJ Anderson, IE McCallum, RW AF Tang, W Wu, YQ Dennis, KW Kramer, MJ Anderson, IE McCallum, RW TI Effect of Zr substitution on microstructure and magnetic properties of YDy-based R2Fe14B magnets (R=Y+Dy+Nd) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID ND2FE14B AB The effect of Zr substitution on the microstructure and magnetic properties in [Nd-0.5(YDy)(0.25)](2.2-x)ZrxCo1.5Fe12.5B (x=0-0.7) ribbons melt spun at a wheel speed of 10 m/s has been systematically studied. For as-spun Zr-free ribbon, a coercivity H-cj of 15.5 kOe is obtained but the demagnetization curve exhibits a large shoulder, resulting in a very low maximum energy product (BH)(max)(3 MGOe). With increasing Zr content (x), H-cj first decreases and then increases. When x=0.4, both H-cj and (BH)(max) reach their optimized values of 10.6 kOe and 9.6 MGOe, respectively. The H-cj and (BH)(max) for the sample at 200 degrees C are 5 kOe and 4.3 MGOe, respectively. Transmission electron microscopy characterizations show that the average grain size is 200, 65, and 50 nm for x=0, 0.4, and 0.7, respectively, indicating that the substitution of Zr can effectively inhibit grain growth. However, an excessive substitution of Zr results in the appearance of the 2:17 phase and thus the reduction of magnetic properties. (c) 2005 American Institute of Physics. C1 Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50010 USA. RP Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50010 USA. EM weitang@ameslab.gov NR 8 TC 4 Z9 4 U1 1 U2 6 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 2005 VL 97 IS 10 AR 10H106 DI 10.1063/1.1853112 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300331 ER PT J AU Tao, XP Landau, DP Schulthess, TC Stocks, GM AF Tao, XP Landau, DP Schulthess, TC Stocks, GM TI Spin dynamics simulations of BCC iron SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETIC EXCITATIONS; CRITICAL-BEHAVIOR; TC; NICKEL; TEMPERATURE; FERROMAGNET; SCATTERING AB Using spin dynamics simulations we investigated the magnetic excitations in paramagnetic iron with a Heisenberg model considering four shells of interacting neighbors. We determined the dynamic structure factor S(q,omega) and found two peaks in "constant-E" scans and three peaks in "constant-q" scans for the paramagnetic regime. Fitting of "constant-q" scans shows that peaks centered at +/-omega(0) are due to propagating modes for moderate vertical bar q vertical bar. Our results indicate that spin wave excitations persist above T(c). (c) 2005 American Institute of Physics. C1 Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA. Oak Ridge Natl Lab, Ctr Computat Sci & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Math, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Ctr Computat Sci & Met, Oak Ridge, TN 37831 USA. RP Tao, XP (reprint author), Univ Georgia, Ctr Simulat Phys, Athens, GA 30602 USA. EM txp@physast.uga.edu RI Stocks, George Malcollm/Q-1251-2016 OI Stocks, George Malcollm/0000-0002-9013-260X NR 18 TC 3 Z9 3 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10A722 DI 10.1063/1.1861273 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300054 ER PT J AU Teplin, CW Levi, DH Iwaniczko, E Jones, KM Perkins, JD Branz, HM AF Teplin, CW Levi, DH Iwaniczko, E Jones, KM Perkins, JD Branz, HM TI Monitoring and modeling silicon homoepitaxy breakdown with real-time spectroscopic ellipsometry SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; LOW-TEMPERATURE; EPITAXIAL SILICON; THIN-FILMS; SI; GROWTH; HYDROGEN AB Real-time spectroscopic ellipsometry (RTSE) is used to monitor the breakdown of low-temperature homoepitaxial growth of silicon on silicon wafers in a hot-wire chemical-vapor deposition reactor. We develop and evaluate two optical models to interpret the RTSE data, revealing the progression of epitaxy and its eventual breakdown into amorphous silicon growth. Comparison of the RTSE analysis with cross-sectional transmission electron microscopy, ex situ variable-angle spectroscopic ellipsometry, and Raman spectroscopy measurements shows that RTSE provides accurate and fast quantitative feedback about the progression of epitaxy. (c) 2005 American Institute of Physics. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Teplin, CW (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM charles_teplin@nrel.gov NR 21 TC 28 Z9 29 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 103536 DI 10.1063/1.1903110 PN 1 PG 7 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100059 ER PT J AU Thompson, SH Brown, G Rikvold, PA AF Thompson, SH Brown, G Rikvold, PA TI Reversal modes of simulated iron nanopillars in an obliquely oriented field SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc AB Stochastic micromagnetic simulations are employed to study switching in three-dimensional magnetic nanopillars exposed to highly misaligned fields. The switching appears to proceed through two different decay modes, characterized by very different average lifetimes and different average values of the transverse magnetization components. (c) 2005 American Institute of Physics. C1 Florida State Univ, Dept Phys, Sch Computat Sci, Tallahassee, FL 32306 USA. Florida State Univ, Ctr Mat Sci & Technol, Tallahassee, FL 32306 USA. Oak Ridge Natl Lab, Sch Computat Sci, Oak Ridge, TN 37831 USA. Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. RP Thompson, SH (reprint author), Florida State Univ, Dept Phys, Sch Computat Sci, Tallahassee, FL 32306 USA. RI Brown, Gregory/F-7274-2016 OI Brown, Gregory/0000-0002-7524-8962 NR 7 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10E520 DI 10.1063/1.1857752 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300277 ER PT J AU Urbano, RR Pagliuso, PG Rettori, C Schlottmann, P Nakatsuji, S Fisk, Z Sarrao, JL Bianchi, A Oseroff, SB AF Urbano, RR Pagliuso, PG Rettori, C Schlottmann, P Nakatsuji, S Fisk, Z Sarrao, JL Bianchi, A Oseroff, SB TI Evolution from insulator (x=0.003) to metal (x=1) of the Eu2+ local environment in Ca1-xEuxB6 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID SPIN RESONANCE ABSORPTION; FERROMAGNETIC EUB6; HEXABORIDES AB The local environment of Eu2+ (4f(7) S=7/2) in Ca1-xEuxB6 (0.003 <= x <= 1.00) is studied by means of electron spin resonance (ESR). For x less than or similar to 0.07 the resonances have Lorentzian line shape, indicating an insulating environment for the Eu2+ ions. For x greater than or similar to 0.07, the lines broaden and become Dysonian in shape, suggesting a change to metallic environment for the EU2+, ions, anticipating the semimetallic character of EuB6. The broadening is attributed to a spin-flip scattering relaxation process due to the exchange interaction between conduction and Eu(2+)4f electrons. High field ESR measurements for x greater than or similar to 0.30 reveal narrower and anisotropic linewidths, which are attributed to magnetic polarons and Fermi surface effects, respectively. (c) 2005 American Institute of Physics. C1 UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. San Diego State Univ, San Diego, CA 92182 USA. RP Urbano, RR (reprint author), UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil. EM urbano@ifi.unicamp.br RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Urbano, Ricardo/F-5017-2012; Schlottmann, Pedro/G-1579-2013; Bianchi, Andrea/E-9779-2010; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; Bianchi, Andrea/0000-0001-9340-6971; NR 18 TC 2 Z9 2 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 2005 VL 97 IS 10 AR 10A924 DI 10.1063/1.1855612 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300079 ER PT J AU Velev, J Butler, WH AF Velev, J Butler, WH TI Applicability of the coherent potential approximation for transmission through disordered interfaces SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID MAGNETORESISTANCE AB We present a study of ballistic conductance through substitutionally disordered Fe-Cr(100) interfaces. The effects of interface disorder on the conductance are investigated using (a) a supercell approach (SA) where disorder is approximated by randomly generated configurations within large two-dimensional supercells and (b) the layer adapted coherent potential approximation (CPA). The SA gives simultaneously the specular and diffuse part of the transmission. The CPA, on the other hand, accounts only for specular transmission. We observe excellent agreement between the CPA result and the specular part of the transmission obtained via the SA. However, the CPA, in the absence of vertex corrections does not account for the diffuse transmission and therefore cannot be used to describe phenomena such as current perpendicular to the plane giant magnetoresistance (CPP GMR). (c) 2005 American Institute of Physics. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA. RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. NR 8 TC 5 Z9 5 U1 1 U2 1 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 2005 VL 97 IS 10 AR 10C517 DI 10.1063/1.1856171 PN 2 PG 3 WC Physics, Applied SC Physics GA 940TP UT WOS:000230168300151 ER PT J AU Wharton, KB Kim, JM Stuart, BC AF Wharton, KB Kim, JM Stuart, BC TI Effects of nanosecond-duration laser prepulses on solid targets SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HIGH-INTENSITY LASER; X-RAY PULSES; PLASMA; W/CM(2) AB A critical issue in high-intensity laser-solid interactions is the effect of the laser prepulse on the target, but the experimental details of these lower-intensity interactions are often difficult to measure due to the subsequent high-intensity pulse. We have performed target experiments using a 0.5-ns duration, 800-nm wavelength laser pulse, specifically designed to mimic the typical amplified spontaneous emission (ASE) prepulse from a high-power Ti:Sapphire, laser. Using this "artificial" ASE prepulse, we find that the threshold for relevant changes to typical solid targets occurs at a fluence of similar to 0.1 J/cm(2), or similar to 10(8) W/cm(2), well below the plasma formation threshold. Notably, the results are not consistent with simple surface vaporization, and suggest that the ASE prepulse causes multiatom clusters to be ejected from the target surface. In a full high-intensity experiment, this ablated material would then strongly interact with the subsequent primary laser pulse. (c) 2005 American Institute of Physics. C1 San Jose State Univ, Dept Phys, San Jose, CA 95192 USA. Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Wharton, KB (reprint author), San Jose State Univ, Dept Phys, San Jose, CA 95192 USA. EM wharton@science.sjsu.edu RI Stuart, Brent/K-4988-2015 NR 17 TC 4 Z9 4 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 103303 DI 10.1063/1.1904719 PN 1 PG 4 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100017 ER PT J AU Zhou, XT Sham, TK Shan, YY Duan, XF Lee, ST Rosenberg, RA AF Zhou, XT Sham, TK Shan, YY Duan, XF Lee, ST Rosenberg, RA TI One-dimensional zigzag gallium nitride nanostructures SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SEMICONDUCTOR NANOWIRES; SILICON NANOWIRES; CDSE NANOCRYSTALS; LASER-ABLATION; TEMPERATURE; NANOBELTS; NANORODS; BEHAVIOR; CARBON AB Two one-dimensional (ID) single-crystalline gallium nitride (GaN) nanostructures with periodic zigzag (type I) and diameter-modulated (type II) shapes have been synthesized by passing through ammonia over a mixture of gallium and gallium oxide (Ga2O3) powders held at elevated temperature. The process was catalyzed by the dispersion of thio-capped Au nanoparticles on the substrate onto which GaN nanostructures were condensed. The transformation between these two nanostructure morphologies was also observed. A possible growth model for the zigzag-shaped nanostructures is proposed, in which the formation of the zigzag nanostructures results from the construction of two different nanoscale unit cells. This work provides an avenue to a group of 1D nanostructures with a zigzag shape. The possibility to form 1D nanostructures yet to be discovered by changing the stacking direction of the (0001) plane will facilitate the fabrication of nanoscale functional devices as well as our understanding of the growth behavior of nanoscale crystallites. (c) 2005 American Institute of Physics. C1 Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada. City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China. City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China. Chinese Acad Sci, China & Beijing Lab Electron Microscopy, Inst Phys, Beijing 100080, Peoples R China. Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Sham, TK (reprint author), Univ Western Ontario, Dept Chem, London, ON N6A 5B7, Canada. EM sham@uwo.ca; apannale@cityu.edu.hk RI Rosenberg, Richard/K-3442-2012 NR 28 TC 43 Z9 46 U1 2 U2 18 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 2005 VL 97 IS 10 AR 104315 DI 10.1063/1.1897834 PN 1 PG 6 WC Physics, Applied SC Physics GA 940TO UT WOS:000230168100127 ER PT J AU Zhukov, AA Goncharov, AV de Groot, PAJ Ghanem, MA El-Hallag, IS Bartlett, PN Boardman, R Fangohr, H Novosad, V Karapetrov, G AF Zhukov, AA Goncharov, AV de Groot, PAJ Ghanem, MA El-Hallag, IS Bartlett, PN Boardman, R Fangohr, H Novosad, V Karapetrov, G TI Oscillatory thickness dependence of the coercive field in three-dimensional anti-dot arrays from self-assembly SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 49th Annual Conference on Magnetism and Magnetic Materials CY NOV 07-11, 2004 CL Jacksonville, FL SP Phys Conf Inc, IEEE Magnet Soc, Amer Ceram Soc, USN, Off Naval Res, Amer Phys Soc, ASTM Int, Minerals, Met & Mat Soc ID ELECTROCHEMICAL DEPOSITION AB We present studies on magnetic anti-dot nano-structures with three-dimensional (3D) architectures, fabricated using a self-assembly template method. We find that patterning transverse to the film plane, which is a unique feature of this method, results in novel magnetic behavior. In particular, one of the key parameters for a magnetic material, the coercive field B-c, was found to demonstrate an oscillatory dependence on film thickness. (c) 2005 American Institute of Physics. C1 Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England. Univ Southampton, Sch Chem, Southampton SO17 1BJ, Hants, England. Univ Southampton, Sch Engn Sci, Southampton SO17 1BJ, Hants, England. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Goncharov, AV (reprint author), Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England. EM aaz@phys.soton.ac.uk RI Karapetrov, Goran/C-2840-2008; Bartlett, Philip/C-4606-2008; Ghanem, Mohamed /C-3757-2009; Fangohr, Hans/C-6367-2008; Novosad, Valentyn/C-2018-2014; Zhukov, Alexander/E-1331-2014; Novosad, V /J-4843-2015 OI Karapetrov, Goran/0000-0003-1113-0137; Bartlett, Philip/0000-0002-7300-6900; Ghanem, Mohamed /0000-0003-2866-9016; Fangohr, Hans/0000-0001-5494-7193; NR 7 TC 5 Z9 5 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAY 15 PY 2005 VL 97 IS 10 AR 10J701 DI 10.1063/1.1847091 PN 3 PG 3 WC Physics, Applied SC Physics GA 940TQ UT WOS:000230168500071 ER PT J AU Radmilovic, V Richardson, TJ Chen, SJ Ross, PN AF Radmilovic, V Richardson, TJ Chen, SJ Ross, PN TI Carbon-supported Pt-Sn electrocatalysts for the anodic oxidation of H-2, CO, and H-2/CO mixtures. Part I. Microstructural characterization SO JOURNAL OF CATALYSIS LA English DT Article DE platinum; platinum-tin; electrocatalysts; electron microscopy; electron diffraction; X-ray diffraction ID TRANSMISSION ELECTRON-MICROSCOPY; X-RAY-DIFFRACTION; SMALL PARTICLES; CHEMICAL-COMPOSITION; CATALYSTS; ELECTROOXIDATION; SURFACE; CLUSTERS; MONOXIDE; SILICA AB High-resolution transmission electron microscopy (HRTEM), microchemical analysis by X-ray emission spectroscopy (EDS), and X-ray diffraction (XRD) were used to characterize the composition, size, distribution, and morphology of the phases present in three different carbon-supported Pt-Sn catalysts. The catalysts had nominal Pt/Sn atomic ratios of 1: 1 (500N and 900N samples) and 3:1 (E270 sample). The 1: 1 catalyst sample heat-treated at 500 &DEG; C (500N) contained a Pt-rich fcc alloy phase (a(0) = 0.3965 nm) and tetragonal SnO2. The sample from the same precursors heat treated at 900 &DEG; C (900N) consisted of stoichiometric hexagonal PtSn, a nearly stoichiometric Pt3Sn fcc phase (a(0) = 0.3988 nm), and tetragonal SnO2. Neither pure tin nor pure platinum particles were detected in any of the catalysts. The 3 : 1 catalyst sample reduced in H-2 at 270 &DEG; C (E270) was composed entirely of the stoichiometric Pt3Sn cubic phase (a(0) = 0.3998 nm). The Pt3Sn-type particles are predominantly single nanocrystals with mean diameters of &SIM; 4 nm (for the catalysts E270 and 500N) and &SIM; 5 nm (for the catalyst 900N), whereas the PtSn particles were larger. The Pt3Sn-type particles in 500N and 900N were generally highly faceted, with {111} and {200} facets, whereas the E270 catalyst had generally a smooth spheroidal outline. Whereas the Pt3Sn particles in the E270 and 900N catalysts were equiaxed, in the 500N catalyst the alloy particles had uniquely elongated (e.g., ellipsoidal) shapes. © 2005 Elsevier Inc. All rights reserved. C1 Ernest Orlando Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. NCEM, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Ross, PN (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. EM pnross@lbl.gov NR 37 TC 43 Z9 43 U1 2 U2 10 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 2005 VL 232 IS 1 BP 199 EP 209 DI 10.1016/j.jcat.2005.03.007 PG 11 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 923WP UT WOS:000228940500024 ER PT J AU Georgievskii, Y Klippenstein, SJ AF Georgievskii, Y Klippenstein, SJ TI Long-range transition state theory SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ION-DIPOLE CAPTURE; NEUTRAL-NEUTRAL REACTIONS; VARIABLE REACTION COORDINATE; ULTRALOW-TEMPERATURE KINETICS; ANGULAR-MOMENTUM CONSERVATION; METHYL RADICAL RECOMBINATION; RATE CONSTANTS; ADIABATIC CHANNEL; RATE COEFFICIENTS; SUDDEN CAPTURE AB The implementation of variational transition state theory (VTST) for long-range asymptotic potential forms is considered, with particular emphasis on the energy and total angular momentum resolved (mu J-VTST) implementation. A long-range transition state approximation yields a remarkably simple and universal description of the kinetics of reactions governed by long-range interactions. The resulting (mu J-VTST) implementation is shown to yield capture-rate coefficients that compare favorably with those from trajectory simulations (deviating by less than 10%) for a, wide variety of neutral and ionic long-range potential forms. Simple analytic results are derived for many of these cases. A brief comparison with a variety of low-temperature experimental studies illustrates the power of this approach as an analysis tool. The present VTST approach allows for a simple analysis of the applicability conditions for some related theoretical approaches. It also provides an estimate of the temperature or energy at which the "long-range transition state" moves to such short separations that short-range effects, such as chemical bonding, steric repulsion, and electronic state selectivity, must be considered. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Georgievskii, Y (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. EM ygeorgi@sandia.gov OI Klippenstein, Stephen/0000-0001-6297-9187 NR 66 TC 88 Z9 88 U1 7 U2 38 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 2005 VL 122 IS 19 AR 194103 DI 10.1063/1.1899603 PG 17 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 934XS UT WOS:000229743500005 PM 16161559 ER PT J AU Lagutschenkov, A Fanourgakis, GS Niedner-Schatteburg, G Xantheas, SS AF Lagutschenkov, A Fanourgakis, GS Niedner-Schatteburg, G Xantheas, SS TI The spectroscopic signature of the "all-surface" to "internally solvated" structural transition in water clusters in the n=17-21 size regime SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID DOUBLE-RESONANCE SPECTROSCOPY; TRANSFERABLE INTERACTION MODELS; DIP INFRARED-SPECTROSCOPY; GAUSSIAN-BASIS SETS; AB-INITIO THEORY; INTERMOLECULAR VIBRATIONS; GEOMETRY OPTIMIZATION; 1ST PRINCIPLES; SPECTRA; ICE AB The existence of a transitional size regime where preferential stabilization alternates between "all-surface" (all atoms on the surface of a cluster) and "internally solvated" (one water molecule at the center of the cluster, fully solvated) configurations with the addition or the removal of a single water molecule, predicted earlier with the flexible, polarizable (many-body) Thole-type model interaction potential (TTM2-F), has been confirmed from electronic structure calculations for (H2O)(n), n=17-21. The onset of the appearance of the first "interior" configuration in water clusters occurs for n=17. The observed structural alternation between interior (n=17, 19, 21) and all-surface (n=18, 20) global minima in the n=17-21 cluster regime is accompanied by a corresponding spectroscopic signature, namely, the undulation in the position of the most redshifted OH stretching vibrations according to the trend: interior configurations exhibit more redshifted OH stretching vibrations than all-surface ones. These most redshifted OH stretching vibrations form distinct groups in the intramolecular region of the spectra and correspond to localized vibrations of donor OH stretches that are connected to neighbors via "strong" (water dimer-like) hydrogen bonds,and belong to a water molecule with a "free" OH stretch. (c) 2005 American Institute of Physics. C1 Tech Univ Kaiserslautern, Fachbereich Chem, D-67663 Kaiserslautern, Germany. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Lagutschenkov, A (reprint author), Tech Univ Kaiserslautern, Fachbereich Chem, Erwin Schrodinger Str, D-67663 Kaiserslautern, Germany. EM sotiris.xantheas@pnl.gov RI Niedner-Schatteburg, Gereon/B-8393-2011; Xantheas, Sotiris/L-1239-2015; Rothke, Anita/O-5447-2016; OI Niedner-Schatteburg, Gereon/0000-0001-7240-6673; Roethke, Anita/0000-0002-3963-5287; Xantheas, Sotiris/0000-0002-6303-1037 NR 45 TC 70 Z9 70 U1 4 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 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD MAY 15 PY 2005 VL 122 IS 19 AR 194310 DI 10.1063/1.1899583 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 934XS UT WOS:000229743500022 PM 16161576 ER PT J AU Luo, SN Strachan, A Swift, DC AF Luo, SN Strachan, A Swift, DC TI Vibrational density of states and Lindemann melting law SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LENNARD-JONES SYSTEM; MOLECULAR-DYNAMICS; ANHARMONIC CRYSTAL; LATTICE-DYNAMICS; SIMULATIONS; FREQUENCIES; SCATTERING; NEUTRONS; MINERALS; PHASES AB We examine the Lindemann melting law at different pressures using the vibrational density of states (DOS), equilibrium melting curve, and Lindemann parameter delta(L) (fractional root-mean-squared displacement, rmsd, at equilibrium melting) calculated independently from molecular dynamics simulations of the Lennard-Jones system. The DOS is obtained using spectra analysis of atomic velocities and accounts for anharmonicity. The increase of delta(L) with pressure is non-negligible: delta(L) is about 0.116 and 0.145 at ambient and extreme pressures, respectively. If the component of rmsd normal to a reflecting plane as in the Debye-Waller-factor-type measurements using, x rays is adopted for delta(L), these values are about 0.067 (+/- 0.002) and 0.084 (+/- 0.003), and are comparable with experimental and calculated values for face-centered-cubic elements. We find that the Lindemann relation holds accurately at ambient and high pressures. The non-negligible pressure dependence of delta(L) suggests that caution should be exerted in applying the Lindemann law to obtaining the high pressure melting curve anchored at ambient pressure. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM sluo@lanl.gov RI Luo, Sheng-Nian /D-2257-2010 OI Luo, Sheng-Nian /0000-0002-7538-0541 NR 34 TC 32 Z9 32 U1 3 U2 17 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 15 PY 2005 VL 122 IS 19 AR 194709 DI 10.1063/1.1902948 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 934XS UT WOS:000229743500054 PM 16161608 ER PT J AU Forciniti, D Hamilton, WA AF Forciniti, D Hamilton, WA TI Surface enrichment of proteins at quartz/water interfaces: A neutron reflectivity study SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article DE protein adsorption; neutron reflectivity; fibrinogen; albumin; sequential adsorption ID HUMAN-SERUM-ALBUMIN; SELF-ASSEMBLED MONOLAYERS; SILICA-WATER INTERFACE; X-RAY; 3-DIMENSIONAL STRUCTURE; HUMAN FIBRINOGEN; IMMUNOGLOBULIN-G; ADSORPTION; SCATTERING; PH AB Neutron reflectivity (NR) was used to study the adsorption of human serum albumin and human fibrinogen on quartz. The proteins were individually and sequentially adsorbed from heavy water and heavy water/methanol mixtures at pH 4 and 7.0. The technique allows for the subnanometer resolution of the adsorbed layer thickness and gross morphology. Under the conditions of our measurements we found that fibrinogen formed a distinct layer that we interpret as a mat of the protein three layers thick whereas albumin formed only diffuse layers. The adsorption pattern of the two proteins changed radically when one protein was adsorbed oil top of the other (previously adsorbed). In general our Measurements indicate that the adsorbed protein layers on quartz are rather loosely bound and that these layers, incorporating as much as 80% water, extend further into the bulk fluid than might have been expected. (c) 2004 Elsevier Inc. All rights reserved. C1 Univ Missouri, Dept Biol & Chem Engn, Rolla, MO USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Forciniti, D (reprint author), Univ Missouri, Dept Biol & Chem Engn, Rolla, MO USA. EM forciniti@umr.edu NR 61 TC 10 Z9 10 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 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD MAY 15 PY 2005 VL 285 IS 2 BP 458 EP 468 DI 10.1016/j.jcis.2004.11.060 PG 11 WC Chemistry, Physical SC Chemistry GA 920ZB UT WOS:000228732900004 PM 15837460 ER PT J AU Koleske, DD Coltrin, ME Russell, MJ AF Koleske, DD Coltrin, ME Russell, MJ TI Using optical reflectance to measure GaN nucleation layer decomposition kinetics SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE desorption; decomposition; nucleation; optical reflectance; metalorganic chemical vapor deposition; group III nitrides ID CHEMICAL-VAPOR-DEPOSITION; BUFFER LAYER; THERMAL-TREATMENT; REFRACTIVE-INDEX; SAPPHIRE; TEMPERATURE; GROWTH; EVOLUTION; FILMS; MORPHOLOGY AB GaN nucleation layers (NLs) that are used in the two-step GaN growth process on sapphire partially decompose during the ramp from low to high temperature, T. In this paper, we show how the extent of this decomposition can be measured during each growth run using optical reflectance. Using reflectance, the NL decomposition rates were observed to increase with increasing P and T, and decreasing NH3 flow. Also, the NL decomposition rate did not change as the NL growth T was varied, but did increase as the NL thickness increased. The NL decomposition has an activation energy, E-A, of 2.7 +/- 0.2 eV for all annealing conditions studied, while the pre-exponential factor, A(0), depends strongly on the annealing conditions and initial NL thickness. Using the measured NL decomposition kinetics, an analytical model is used to fit the reflectance waveforms which also includes the T dependence of indices of refraction. The model was applied to several sets of reflectance waveforms where the annealing conditions were intentionally varied and the values of A(0) measured and compared. In addition to directly fitting the reflectance waveforms, we introduce another way to quantify decomposition rates measured under constant or varying T. This approach requires a constant E-A for the reaction kinetics throughout the entire T range of interest, which is the case for the GaN NL decomposition. For this approach, time is scaled by an integrated form of the Arrhenius exponential (i.e. exp(-E-A/k(B)T)). We have called this transformation of the time scale the "kinetic advancement," because it allows kinetic processes at constant or varying T to be compared directly. If the reflectance waveform or NL thickness is plotted vs. the kinetic advancement, a straight line results with the slope equal to A(0). The usefulness of both reflectance waveform fitting procedures is discussed, specifically how the reflectance waveform, can be compared and quantified during every growth run in order to verify NL evolution repeatability. (c) 2005 Elsevier B.V. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Koleske, DD (reprint author), Sandia Natl Labs, POB 5800,MS 0601, Albuquerque, NM 87185 USA. EM ddkoles@sandia.gov NR 37 TC 10 Z9 11 U1 1 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD MAY 15 PY 2005 VL 279 IS 1-2 BP 37 EP 54 DI 10.1016/j.jcrysgro.2005.02.011 PG 18 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 929LU UT WOS:000229348400007 ER PT J AU Schiffer, WK Alexoff, DL Shea, C Logan, J Dewey, SL AF Schiffer, WK Alexoff, DL Shea, C Logan, J Dewey, SL TI Development of a simultaneous PET/microdialysis method to identify the optimal dose of C-11-raclopride for small animal imaging SO JOURNAL OF NEUROSCIENCE METHODS LA English DT Article DE MicroPET; rodent; C-11-raclopride; D-2 receptors; microdialysis; mass effect ID POSITRON-EMISSION-TOMOGRAPHY; SMALL LABORATORY-ANIMALS; STRIATAL DOPAMINE-D-2 RECEPTORS; IN-VIVO MEASUREMENT; LIVING HUMAN-BRAIN; RAT-BRAIN; C-11 RACLOPRIDE; PET SYSTEM; L-DOPA; BINDING AB In the field of small animal positron emission tomography (PET), the assumptions underlying human and primate kinetic models may not be sustained in rodents. That is, the threshold dose at which a pharmacologic response occurs may be lower in small animals. In order to define this relationship, we combined ruicroPET imaging using C-11-raclopride with microdialysis measures of extracellular fluid (ECF) dopamine (DA). In addition. we performed a series of studies in which a known mass of raclopride was microinfused into one striatum prior to a high specific activity (SA) systemic injection of C-11-raclopride. This single-injection approach provided a high and low SA region of radiotracer binding in the same animal during the same scanning session. Our data demonstrate that the binding potential (BP) declines above 3.5 pmol/ml (0.35 μ g), with an ED50 of 8.55 &PLUSMN; 5.62 pmol/ml. These data also provide evidence that BP may be compromised by masses of raclopride below 2.0 pmol/ml (0.326 μ g). Increases in ECF DA were produced by mass doses of raclopride over 3.9 pmol/ml (0.329 μ g) with an ED50 of 8.53 &PLUSMN; 2.48 pmol/ml. Taken together, it appears that an optimal range of raclopride mass exists between 2.0 and 3.5 pmol/ml, around which the measured BP can be compromised by system sensitivity, endogenous DA, or excessive competition with unlabeled compound. © 2004 Elsevier B.V. All rights reserved. C1 SUNY Stony Brook, Dept Neurobiol & Behav, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Schiffer, WK (reprint author), SUNY Stony Brook, Dept Neurobiol & Behav, Stony Brook, NY 11794 USA. EM wynne@bnl.gov OI Logan, Jean/0000-0002-6993-9994 FU NIDA NIH HHS [F31 DA015874, F31-DA15874, K02 DA022346, R01 DA015041] NR 36 TC 26 Z9 26 U1 1 U2 4 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 15 PY 2005 VL 144 IS 1 BP 25 EP 34 DI 10.1016/j.jneumeth.2004.10.016 PG 10 WC Biochemical Research Methods; Neurosciences SC Biochemistry & Molecular Biology; Neurosciences & Neurology GA 926XX UT WOS:000229158100004 PM 15848236 ER PT J AU Klueh, RL Shingledecker, JP Swindeman, RW Hoelzer, DT AF Klueh, RL Shingledecker, JP Swindeman, RW Hoelzer, DT TI Oxide dispersion-strengthened steels: A comparison of some commercial and experimental alloys SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID FERRITIC STEELS; CREEP-PROPERTIES; TENSILE; PARTICLES; CLADDINGS; BEHAVIOR; MA957 AB Oxide dispersion-strengthened (ODS) steels are being developed and investigated for nuclear fission and nuclear fusion applications in Japan, Europe, and the United States. In addition, commercial ODS products are available and have been used in niche applications. Microstructural and mechanical properties studies have been conducted at Oak Ridge National Laboratory and elsewhere on various commercial and experimental ODS steels. Tensile and creep properties have been obtained and collected from literature and commercial sources. These data are compared to show the differences and similarities of different ODS steels, and observations are explained in terms of the microstructures of the steels. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Klueh, RL (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008,MS 6138, Oak Ridge, TN 37831 USA. EM kluehrl@ornl.gov RI Hoelzer, David/L-1558-2016 NR 25 TC 240 Z9 248 U1 9 U2 87 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 15 PY 2005 VL 341 IS 2-3 BP 103 EP 114 DI 10.1016/j.jnucmat.2005.01.017 PG 12 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 934DH UT WOS:000229686600002 ER PT J AU Maloy, SA James, MR Romero, TJ Toloczko, MB Kurtz, RJ Kimura, A AF Maloy, SA James, MR Romero, TJ Toloczko, MB Kurtz, RJ Kimura, A TI Tensile properties of the NLF reduced activation ferritic/martensitic steels after irradiation in a fast reactor spectrum to a maximum dose of 67 dpa SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID MARTENSITIC STEELS AB The NLF series of steels are reduced activation ferritic-martensitic (RAFM) steels that are a part of the Japanese program to produce a suitable reduced activation ferritic-martensitic steel for the ITER project. Published reports on the NLF steels after about 35 dpa at 400 degrees C by Kurishita et al., indicate that these steels have similar strength and better ductility than other RAFM steels such as the JLF steels and F82H irradiated at 400 degrees C to similar doses. The tensile properties of NLF steels irradiated at similar to 400 degrees C to doses as high as 67 dpa are presented here. Tensile tests were conducted at a strain rate of 5 x 10(-4) s(-1) at 25, 400 degrees C, and 500 degrees C. Variations in irradiation temperature in the range of 390-430 degrees C had a relatively small, but definite effect on the tensile properties for tests conducted at 25, 400, and 500 degrees C. The strongest hardening is observed for specimens irradiated at 390 degrees C, and very little hardening is observed for specimens irradiated at 430 degrees C. Strain rate jump tests were performed on NLF-0 and NLF-1 at 400 degrees C after irradiation to 52 dpa. The rate sensitivity, m, is quite low, 0.003-0.005 and does not appear to be affected by irradiation at 52 dpa for an irradiation temperature of 430 degrees C. (c) 2005 Published by Elsevier B.V. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Kyoto Univ, Inst Adv Energy, Uji, Japan. RP Maloy, SA (reprint author), Los Alamos Natl Lab, MS-H816, Los Alamos, NM 87545 USA. EM maloy@lant.gov RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 13 TC 4 Z9 4 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 15 PY 2005 VL 341 IS 2-3 BP 141 EP 147 DI 10.1016/j.jnucmat.2005.01.013 PG 7 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 934DH UT WOS:000229686600006 ER PT J AU Surh, MP Sturgeon, JB Wolfer, WG AF Surh, MP Sturgeon, JB Wolfer, WG TI Master equation and Fokker-Planck methods for void nucleation and growth in irradiation swelling (vol 325, pg 44, 2004) SO JOURNAL OF NUCLEAR MATERIALS LA English DT Correction C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Sturgeon, JB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM jsturgeon@llnl.gov NR 1 TC 2 Z9 2 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 15 PY 2005 VL 341 IS 2-3 BP 235 EP 236 DI 10.1016/j.jnucmat.2005.03.002 PG 2 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 934DH UT WOS:000229686600018 ER PT J AU Surh, MP Sturgeon, JB Wolfer, WG AF Surh, MP Sturgeon, JB Wolfer, WG TI Vacancy cluster evolution and swelling in irradiated 316 stainless steel (vol 328, pg 107, 2004) SO JOURNAL OF NUCLEAR MATERIALS LA English DT Correction C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Sturgeon, JB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM jsturgeon@llnl.gov NR 1 TC 2 Z9 2 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 15 PY 2005 VL 341 IS 2-3 BP 235 EP 236 DI 10.1016/j.jnucmat.2005.03.002 PG 2 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 934DH UT WOS:000229686600019 ER PT J AU Surh, MP Sturgeon, JB Wolfer, WG AF Surh, MP Sturgeon, JB Wolfer, WG TI Radiation swelling behavior and its dependence on temperature, dose rate and dislocation structure evolution (vol 336, pg 217, 2004) SO JOURNAL OF NUCLEAR MATERIALS LA English DT Correction C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Sturgeon, JB (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM jsturgeon@llnl.gov NR 1 TC 2 Z9 2 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD MAY 15 PY 2005 VL 341 IS 2-3 BP 235 EP 236 DI 10.1016/j.jnucmat.2005.03.002 PG 2 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA 934DH UT WOS:000229686600020 ER PT J AU Li, HW Yeung, ES AF Li, HW Yeung, ES TI Single-molecule dynamics of conformational changes in flavin adenine dinucleotide SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY LA English DT Article DE photochemistry; protein conformation; flavin; single molecule ID COLI THIOREDOXIN REDUCTASE; PROTEIN MOLECULES; GENE-EXPRESSION; REAL-TIME; FLAVOPROTEIN; RESOLUTION; INTERFACE; COMPLEX; REDOX; BETA AB Dynamic conformational changes of the prosthetic group, flavin adenine dinucleotide (FAD), in flavoprotein NADH peroxidase (Npx), in thioredoxin reductase (TrxR), and in free solution were monitored with total internal reflection fluorescence microscopy. FAD bound loosely in the proteins changed from the stacked conformation to the unstacked conformation upon laser excitation. On the other hand, our results show that FAD in free solution not only underwent conformational changes but also reacted with each other to form a dimer. © 2004 Elsevier B.V. All rights reserved. C1 Iowa State Univ, USDOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Yeung, ES (reprint author), Iowa State Univ, USDOE, Ames Lab, 1161 Gilman Hall, Ames, IA 50011 USA. EM yeung@ameslab.gov OI Li, Hung Wing/0000-0003-4840-1965 NR 23 TC 5 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 1010-6030 J9 J PHOTOCH PHOTOBIO A JI J. Photochem. Photobiol. A-Chem. PD MAY 15 PY 2005 VL 172 IS 1 BP 73 EP 79 DI 10.1016/j.jphotochem.2004.11.016 PG 7 WC Chemistry, Physical SC Chemistry GA 925NJ UT WOS:000229059500009 ER PT J AU Bartolozzi, M Leinweber, DB Thomas, AW AF Bartolozzi, M Leinweber, DB Thomas, AW TI Self-organized criticality and stock market dynamics: an empirical study SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS LA English DT Article DE complex systems; econophysics; self-organized criticality; wavelets ID 1D TRAFFIC FLOW; SOLAR-FLARES; TURBULENCE; MODELS; AVALANCHES; EARTHQUAKES; DRIVEN; EVENTS; JAMS; 1/F AB The stock market is a complex self-interacting system, characterized by intermittent behaviour. Periods of high activity alternate with periods of relative calm. In the present work we investigate empirically the possibility that the market is in a self-organized critical state (SOC). A wavelet transform method is used in order to separate high activity periods, related to the avalanches found in sandpile models, from quiescent. A statistical analysis of the filtered data shows a power law behaviour in the avalanche size, duration and laminar times. The memory process, implied by the power law distribution of the laminar times, is not consistent with classical conservative models for self-organized criticality. We argue that a "near-SOC" state or a time dependence in the driver, which may be chaotic, can explain this behaviour. (c) 2004 Elsevier B.V. All rights reserved. C1 Univ Adelaide, Special Res Ctr Subatom Struct Matter, CSSM, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia. Jefferson Lab, Newport News, VA 23606 USA. RP Leinweber, DB (reprint author), Univ Adelaide, Special Res Ctr Subatom Struct Matter, CSSM, Adelaide, SA 5005, Australia. EM dleinweb@physics.adelaide.edu.au RI Thomas, Anthony/G-4194-2012; Leinweber, Derek/J-6705-2013 OI Thomas, Anthony/0000-0003-0026-499X; Leinweber, Derek/0000-0002-4745-6027 NR 44 TC 15 Z9 17 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD MAY 15 PY 2005 VL 350 IS 2-4 BP 451 EP 465 DI 10.1016/j.physa.2004.11.061 PG 15 WC Physics, Multidisciplinary SC Physics GA 913HQ UT WOS:000228142600022 ER PT J AU Willis, MA Song, F Zhuang, ZH Krajewski, W Chalamasetty, VR Reddy, P Howard, A Dunaway-Mariano, D Herzberg, O AF Willis, MA Song, F Zhuang, ZH Krajewski, W Chalamasetty, VR Reddy, P Howard, A Dunaway-Mariano, D Herzberg, O TI Structure of YciI from Haemophilus influenzae (HI0828) reveals a ferredoxin-like alpha/beta-fold with a histidine/aspartate centered catalytic site SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID CRYSTAL-STRUCTURE; MUCONOLACTONE ISOMERASE; ESCHERICHIA-COLI; PROTEIN; DATABASE; PATHWAY; IDENTIFICATION; REFINEMENT; RESOLUTION; MODEL C1 Univ Maryland, Maryland Biotechnol Inst, Ctr Adv Res Biotechnol, Rockville, MD 20850 USA. Univ New Mexico, Dept Chem, Albuquerque, NM 87131 USA. Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. IIT, Chicago, IL 60616 USA. RP Herzberg, O (reprint author), Univ Maryland, Maryland Biotechnol Inst, Ctr Adv Res Biotechnol, 9600 Gudelsky Dr, Rockville, MD 20850 USA. EM osnat@carb.nist.gov FU CGH CDC HHS [P01 GH57890]; NIGMS NIH HHS [GM28688] NR 30 TC 8 Z9 9 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 MAY 15 PY 2005 VL 59 IS 3 BP 648 EP 652 DI 10.1002/prot.20411 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 921QJ UT WOS:000228779200025 PM 15779043 ER PT J AU Stimson, HC Breshears, DD Ustin, SL Kefauver, SC AF Stimson, HC Breshears, DD Ustin, SL Kefauver, SC TI Spectral sensing of foliar water conditions in two co-occurring conifer species: Pinus edulis and Juniperus monosperma SO REMOTE SENSING OF ENVIRONMENT LA English DT Article DE Pinus edulis; Juniperus monosperma; foliar water content; water potential; spectral remote sensing; drought stress; spectral indices ID NORTHERN NEW-MEXICO; SEMIARID WOODLAND; REFLECTANCE MEASUREMENTS; ELEVATIONAL GRADIENT; LEAF REFLECTANCE; SPATIAL-PATTERN; SOIL-MOISTURE; WOODY-PLANTS; AVIRIS DATA; RED EDGE AB Many fundamental ecosystem properties and dynamics are determined by plant water stress, particularly in dryland ecosystems where water is usually limiting. Indeed, under severe drought, plant water stress and associated insect infestations can produce landscape-scale mortality. Despite the fundamental importance of plant water stress in determining properties and dynamics at ecosystem and landscape scales, approaches for remotely sensing plant water stress are largely lacking. particularly for conifers, We evaluated the remotely sensed detection of foliar drought stress in two conifer species, Pinus edulis and Juniperus monosperma, which are co-dominants of extensive jumper woodlands in North America, the first of which experienced extensive mortality in association with a recent drought, Needle spectra were made on these species in the field using an integrating sphere and pot-table spectrometer, Two indices of foliar water condition, plant water content (% of dry mass) and plant water potential, were compared to five spectral analyses: Continuum removal of the 970 and 1200 nm water absorption features, the Normalized Difference Water Index (NDWI), the Normalized Difference Vegetation Index (NDVI), and the red edge wavelength position. For P edulis, plant water content was significantly correlated with four of the five indices: NDVI (R-2=0.71) and NDWI (R-2=0.68) which exhibited stronger relationships than 970 nm continuum removal (R-2=0.57) or red edge position (R-2=0.45). All Five indices were significantly correlated with P edulis water content when trees undergoing mortality Were included in analyses (R-2=0.60 0.93), Although the correlations were weaker than for plant water content, plant water potential was significantly correlated with NDWI (R-2=0.49), 970 nm (R-2=0.44), NDVI (R-2=0.35), and red edge (R-2=0.34); again all five indices had significant relationships when trees undergoing mortality were included (R-2=0.51-0.86). The relationships were weaker for J. monosperma: water content was significantly related to 970 nm (R-2=0.50) and 1200 nm (R-2=0.37) continuums; and NDVI (R-2=0.33), while water potential was related only to 1200 nm (R-2=0.40). Our results demonstrate a critical link between plant physiological characteristics tied to water stress and associated spectral signatures for two extensive co-occurring conifer species. (c) 2005 Elsevier Inc. All rights reserved. C1 Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Breshears, DD (reprint author), Univ Arizona, Sch Nat Resources, Inst Study Planet Earth, Biol Sci E 325, Tucson, AZ 85721 USA. EM daveb@ag.arizona.edu RI Breshears, David/B-9318-2009; OI Breshears, David/0000-0001-6601-0058; Kefauver, Shawn/0000-0002-1687-1965 NR 63 TC 73 Z9 74 U1 1 U2 30 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0034-4257 J9 REMOTE SENS ENVIRON JI Remote Sens. Environ. PD MAY 15 PY 2005 VL 96 IS 1 BP 108 EP 118 DI 10.1016/j.rse.2004.12.007 PG 11 WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic Technology SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science & Photographic Technology GA 929OJ UT WOS:000229355100009 ER PT J AU Timchalk, C Poet, TS Hinman, MN Busby, AL Kousba, AA AF Timchalk, C Poet, TS Hinman, MN Busby, AL Kousba, AA TI Pharmacokinetic and pharmacodynamic interaction for a binary mixture of chlorpyrifos and diazinon in the rat SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article DE cholinesterase; organophosphorus insecticide; chlorpyrifos; diazinon; mixtures ID HUMAN LIVER-MICROSOMES; ORGANOPHOSPHATE PESTICIDES; CHOLINESTERASE ACTIVITY; KINETIC-PARAMETERS; EXPOSURE PATHWAYS; DRUG ABSORPTION; BINDING-SITE; ADULT RATS; PARATHION; METABOLISM AB Chlorpyrifos (CPF) and diazinon (DZN) are two commonly used organophosphorus (OP) insecticides and a potential exists for concurrent exposures. The primary neurotoxic effects from OP pesticide exposures result from the inhibition of acetylcholinesterase (AChE). The pharmacokinetic and pharmacodynamic impact of acute binary exposures of rats to CPF and DZN was evaluated in this study. Rats were orally administered CPF, DZN, or a CPF/DZN mixture (0, 15, 30, or 60 mg/kg) and blood (plasma and RBC), and brain were collected at 0, 3, 6, 12, and 24 h postdosing, urine was also collected at 24 h. Chlorpyrifos, DZN, and their respective metabolites, 3,5,6-trichloro-2-pyridinol (TCP) and 2-isopropyl-4-methyl-6-hydroxypyrimidine (IMHP), were quantified in blood and/or urine and cholinesterase (ChE) inhibition was measured in brain, RBC, and plasma. Coexposure to CPF/DZN at the low dose of 15/15 mg/kg did not after the pharmacokinetics of CPF, DZN, or their metabolites in blood. A high binary dose of 60/60 mg/kg increased the C-max and AUC and decreased the clearance for both parent compounds, likely due to competition between CPF and DZN for CYP450 metabolism. At lower doses, most likely to be encountered in occupational or environmental exposures, the pharmacokinetics were linear. A dose-dependent inhibition of ChE was noted in tissues for both the single and coexposures, and the extent of inhibition was plasma > RBC >= brain. The overall relative potency for ChE inhibition was CPF/DZN > CPF > DZN. A comparison of the ChE response at the low binary dose (15/15 mg/kg), where there were no apparent pharmacokinetic interactions, suggested that the overall ChE response was additive. These experiments represent important data concerning the potential pharmacokinetic and pharmacodynamic interactions for pesticide mixtures and will provide needed insight for assessing the potential cumulative risk associated with occupational or environmental exposures to these insecticides. (c) 2004 Elsevier Inc. All rights reserved. C1 Battelle Mem Inst, Pacific NW Div, Ctr Biol Monitoring & Modeling, Richland, WA 99352 USA. Whitworth Coll, Spokane, WA 99251 USA. Trinity Western Univ, Langley, BC, Canada. TargeGen Inc, San Diego, CA 92121 USA. RP Timchalk, C (reprint author), Battelle Mem Inst, Pacific NW Div, Ctr Biol Monitoring & Modeling, POB 999, Richland, WA 99352 USA. EM charles.timchalk@pnl.gov FU NIOSH CDC HHS [5 R01 OH003629-03] NR 41 TC 37 Z9 42 U1 4 U2 11 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD MAY 15 PY 2005 VL 205 IS 1 BP 31 EP 42 DI 10.1016/j.taap.2004.09.004 PG 12 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA 928CJ UT WOS:000229248400003 PM 15885262 ER PT J AU Asnes, A Friedel, RW Stadsnes, J Thomsen, M Ostgaard, N Cayton, T AF Asnes, A Friedel, RW Stadsnes, J Thomsen, M Ostgaard, N Cayton, T TI Statistical pitch angle properties of substorm-injected electron clouds and their relation to dawnside energetic electron precipitation SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETOSPHERIC PLASMA ANALYZER; WHISTLER-MODE CHORUS; X-RAY EVENTS; AURORAL-ZONE; GEOSYNCHRONOUS ORBIT; RELATIVISTIC ENERGIES; MORNING SECTOR; VLF EMISSIONS; DIFFUSION; FIELD AB [1] Using the existing large database of geosynchronous orbit particle measurements from Los Alamos instruments, statistical properties of substorm-injected electron clouds are investigated, with special focus on the pitch angle distribution ( PAD) of the electrons. The electron distributions at 6.6 R-E do in general show some anisotropy, and their PADs are probably caused by the combined influence of drift orbits, different for each energy and pitch angle, and pitch angle diffusion due to waves. The statistical results of this paper indicate that the PADs during intervals of increased electron flux at energies greater than 10 keV from midnight till noon are dominated by pitch angle diffusion by interaction with waves. The strength of the pitch angle diffusion is seen to initially limit the growth of anisotropy from differential drift speeds and orbits and later on to increase the anisotropy when the diffusion strength decreases. After local noon we find evidence that pitch angle diffusion is no longer important and the PADs are evolving due to differential drift effects. C1 Univ Bergen, Dept Phys & Technol, N-5007 Bergen, Norway. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Asnes, A (reprint author), Univ Bergen, Dept Phys & Technol, Allegt 55, N-5007 Bergen, Norway. EM arne.asnes@ift.uib.no; friedel@lanl.gov; johan.stadsnes@ift.uib.no; mthomsen@lanl.gov; nikost@ift.uib.no; tcayton@lanl.gov RI Friedel, Reiner/D-1410-2012 OI Friedel, Reiner/0000-0002-5228-0281 NR 46 TC 8 Z9 8 U1 0 U2 0 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 14 PY 2005 VL 110 IS A5 AR A05207 DI 10.1029/2004JA010838 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 927QW UT WOS:000229212800004 ER PT J AU Feldhaus, J Arthur, J Hastings, JB AF Feldhaus, J Arthur, J Hastings, JB TI X-ray free-electron lasers SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Review ID SASE-FEL; BACTERIORHODOPSIN PHOTOSYNTHESIS; VIBRATIONAL-RELAXATION; STATISTICAL PROPERTIES; STIMULATED-EMISSION; HYDROXYL STRETCH; MAGNETIC-FIELD; TIME SCALES; DYNAMICS; PHOTOISOMERIZATION AB In a free-electron laser (FEL) the lasing medium is a high-energy beam of electrons flying with relativistic speed through a periodic magnetic field. The interaction between the synchrotron radiation that is produced and the electrons in the beam induces a periodic bunching of the elelctrons, greatly increasing the intensity of radiation produced at a particular wavelength. Depending only on a phase match between the electron energy and the magnetic period, the wavelength of the FEL radiation can be continuously tuned within a wide spectral range. The FEL concept can be adapted to produce radiation wavelengths from millimetres to Angstroms, and can in principle produce hard x-ray beams with unprecedented peak brightness, exceeding that of the brightest synchrotron source by ten orders of magnitude or more. This paper focuses on short-wavelength FELs. It reviews the physics and characteristic properties of single-pass FELs, as well as current' technical developments aiming for fully coherent x-ray radiation pulses with pulse durations in the 100 fs to 100 as range. First experimental results at wavelengths around 100 nm and examples of scientific applications planned on the new, emerging x-ray FEL facilities are presented. C1 DESY, D-22603 Hamburg, Germany. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Feldhaus, J (reprint author), DESY, D-22603 Hamburg, Germany. RI Feldhaus, Josef/C-1130-2014 NR 110 TC 114 Z9 114 U1 6 U2 31 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD MAY 14 PY 2005 VL 38 IS 9 SI SI BP S799 EP S819 DI 10.1088/0953-4075/38/9/023 PG 21 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 930EY UT WOS:000229399800024 ER PT J AU Gardner, SN Fernandes, M AF Gardner, SN Fernandes, M TI Prediction of cancer outcome with microarrays SO LANCET LA English DT Letter C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Gardner, SN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM Gardner26@llnl.gov NR 5 TC 2 Z9 2 U1 0 U2 0 PU LANCET LTD PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0140-6736 J9 LANCET JI Lancet PD MAY 14 PY 2005 VL 365 IS 9472 BP 1685 EP 1685 DI 10.1016/S0140-6736(05)66540-3 PG 1 WC Medicine, General & Internal SC General & Internal Medicine GA 925VV UT WOS:000229082300018 PM 15894093 ER PT J AU Wang, YD Peng, RL Almer, J Oden, M Liu, YD Deng, JN He, CS Chen, L Li, QL Zuo, L AF Wang, YD Peng, RL Almer, J Oden, M Liu, YD Deng, JN He, CS Chen, L Li, QL Zuo, L TI Grain-to-grain stress interactions in an electrodeposited iron coating SO ADVANCED MATERIALS LA English DT Article ID DEPENDENT RESIDUAL-STRESS; INTERGRANULAR STRAINS; THIN-FILMS; X-RAYS; POLYCRYSTALS; DEFORMATION; RESOLUTION; ALLOYS; FLOW AB Lattice strain distributions mapped by high energy X-ray diffraction (see Figure) in an electrodeposited iron coating with nanocrystalline grains show high nonlinearity, providing unambiguous evidence for the existence of a strong stress interaction along the growth/deposition direction in a layered material. C1 Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110004, Peoples R China. Linkoping Univ, Studsvik Neutron Res Lab, NFL, S-61182 Linkoping, Sweden. Linkoping Univ, Dept Mech Engn, S-61182 Linkoping, Sweden. Argonne Natl Lab, APS, Argonne, IL 60439 USA. Lulea Tekniska Univ, Div Engn Mat, S-97187 Lulea, Sweden. Univ Sci & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China. RP Wang, YD (reprint author), Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110004, Peoples R China. EM ydwang@mail.neu.edu.cn; lIzuo@mail.neu.edu.cn RI Oden, Magnus/E-9662-2010; wang, yandong/G-9404-2013 OI Oden, Magnus/0000-0002-2286-5588; NR 28 TC 13 Z9 13 U1 0 U2 9 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 13 PY 2005 VL 17 IS 10 BP 1221 EP + DI 10.1002/adma.200401420 PG 7 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 927CU UT WOS:000229170800001 ER PT J AU Savchenko, A Krogan, N Cort, JR Evdokimova, E Lew, JM Yee, AA Sanchez-Pulido, L Andrade, MA Bochkarev, A Watson, JD Kennedy, MA Greenblatt, J Hughes, T Arrowsmith, CH Rommens, JM Edwards, AM AF Savchenko, A Krogan, N Cort, JR Evdokimova, E Lew, JM Yee, AA Sanchez-Pulido, L Andrade, MA Bochkarev, A Watson, JD Kennedy, MA Greenblatt, J Hughes, T Arrowsmith, CH Rommens, JM Edwards, AM TI The Shwachman-Bodian-Diamond syndrome protein family is involved in RNA metabolism SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID DNA-BINDING DOMAIN; YEAST NSR1 PROTEIN; SACCHAROMYCES-CEREVISIAE; RIBOSOMAL-PROTEINS; GENETIC-ANALYSIS; SPLICING FACTORS; NUCLEAR-PROTEIN; FISSION YEAST; NMR; SIMILARITY AB A combination of structural, biochemical, and genetic studies in model organisms was used to infer a cellular role for the human protein (SBDS) responsible for Shwachman-Bodian-Diamond syndrome. The crystal structure of the SBDS homologue in Archaeoglobus fulgidus, AF0491, revealed a three domain protein. The N-terminal domain, which harbors the majority of disease-linked mutations, has a novel three-dimensional fold. The central domain has the common winged helix-turn-helix motif, and the C-terminal domain shares structural homology with known RNA-binding domains. Proteomic analysis of the SBDS sequence homologue in Saccharomyces cerevisiae, YLR022C, revealed an association with over 20 proteins involved in ribosome biosynthesis. NMR structural genomics revealed another yeast protein, YHR087W, to be a structural homologue of the AF0491 N-terminal domain. Sequence analysis confirmed them as distant sequence homologues, therefore related by divergent evolution. Synthetic genetic array analysis of YHR087W revealed genetic interactions with proteins involved in RNA and rRNA processing including Mdm20/Nat3, Nsr1, and Npl3. Our observations, taken together with previous reports, support the conclusion that SBDS and its homologues play a role in RNA metabolism. C1 Univ Toronto, Charles H Best Inst, Banting & Best Dept Med Res, Toronto, ON M5G 1L6, Canada. Univ Toronto, Ontario Ctr Struct Proteom, Toronto, ON M5G 1L6, Canada. Univ Toronto, Struct Genom Consortium, Toronto, ON M5G 1L6, Canada. Univ Toronto, Dept Mol & Med Genet, Toronto, ON M5S 1A8, Canada. Pacific NW Natl Lab, NE Struct Genom Consortium, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Ontario Canc Inst, Div Mol & Struct Biol, Toronto, ON M5G 2M9, Canada. Univ Toronto, Dept Med Biophys, Toronto, ON M5G 2M9, Canada. CSIC, Ctr Nacl Biotecnol, Prot Design Grp, E-28049 Madrid, Spain. Ottawa Hlth Res Inst, Ontario Genom Innovat Ctr, Bioinformat Grp, Ottawa, ON K1H 8L6, Canada. Univ Oklahoma, Hlth Sci Ctr, Dept Biochem & Mol Biol, Oklahoma City, OK 73190 USA. European Bioinformat Inst, European Mol Biol Lab, Cambridge CB10 1SD, England. Hosp Sick Children, Program Genet & Genom Biol, Toronto, ON M5G 1X8, Canada. RP Edwards, AM (reprint author), Univ Toronto, Charles H Best Inst, Banting & Best Dept Med Res, 112 Coll St, Toronto, ON M5G 1L6, Canada. EM aled.edwards@utoronto.ca RI Andrade, Miguel/B-6565-2008; OI Andrade, Miguel/0000-0001-6650-1711; Sanchez Pulido, Luis/0000-0002-2300-8502 FU NIGMS NIH HHS [P50-GM62413-02, P50-GM62414] NR 68 TC 72 Z9 78 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 13 PY 2005 VL 280 IS 19 BP 19213 EP 19220 DI 10.1074/jbc.M414421200 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 923TN UT WOS:000228932300078 PM 15701634 ER PT J AU Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Butler, JM Bystricky, J Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Chevalier, L Cho, DK Choi, S Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Coss, J Cothenet, A Cousinou, MC Crepe-Renaudin, S Cristetiu, M Cummings, MAC Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ De La Cruz-Burelo, E Martins, CD Dean, S Deliot, F Delsart, PA Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Eltzroth, JT Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, D Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fortner, M Fox, H Freeman, W Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Ginther, G Golling, T Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Jostlein, H Juste, A Kado, MM Kafer, D Kahl, W Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A Kharzheev, YM Kim, KH Klima, B Klute, M Kohli, JM Kopal, M Korablev, VM Kotcher, J Kothari, B Koubarovsky, A Kozelov, AV Kozminski, J Krzywdzinski, S Kuleshov, S Kulik, Y Kunori, S Kupco, A Kurca, T Lager, S Lahrichi, N Landsberg, G Lazoflores, J Le Bihan, AC Lebrun, P Lee, SW Lee, WM Leflat, A Lehner, F Leonidopoulos, C Lewis, P Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipaev, VV Lipton, R Lobo, L Lobodenko, A Lokajicek, M Lounis, A Lubatti, HJ Lueking, L Lynker, M Lyon, AL Maciel, AKA Madaras, RJ Mattig, P Magerkurth, A Magnan, AM Makovec, N Mal, PK Malik, S Malyshev, VL Mao, HS Maravin, Y Martens, M Mattingly, SEK Mayorov, AA McCarthy, R McCroskey, R Meder, D Melanson, HL Melnitchouk, A Merkin, M Merritt, KW Meyer, A Miettinen, H Mihalcea, D Mitrevski, J Mokhov, N Molina, J Mondal, NK Montgomery, HE Moore, RW Muanza, GS Mulders, M Mutaf, YD Nagy, E Narain, M Naumann, NA Neal, HA Negret, JP Nelson, S Neustroev, P Noeding, C Nomerotski, A Novaes, SF Nunnemann, T Nurse, E O'Dell, V O'Neil, DC Oguri, V Oliveira, N Oshima, N Garzon, GJOY Padley, P Parashar, N Park, J Park, SK Parsons, J Partridge, R Parua, N Patwa, A Perea, PM Perez, E Peters, O Petroff, P Petteni, M Phaf, L Piegaia, R Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pope, BG da Silva, WLP Prosper, HB Protopopescu, S Przybycien, MB Qian, J Quadt, A Quinn, B Rani, KJ Rapidis, PA Ratoff, PN Reay, NW Reucroft, S Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Royon, C Rubinov, P Ruchti, R Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schamberger, RD Schellman, H Schieferdecker, P Schmitt, C Schukin, AA Schwartzman, A Schwienhorst, R Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shephard, WD Shpakov, D Sidwell, RA Simak, V Sirotenko, V Skubic, P Slattery, P Smith, RP Smolek, K Snow, GR Snow, J Snyder, S Soldner-Rembold, S Song, X Song, Y Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Steinbruck, G Stevenson, K Stolin, V Stone, A Stoyanova, DA Strandberg, J Strang, MA Strauss, M Strohmer, R Strovink, M Stutte, L Sumowidagdo, S Sznajder, A Talby, M Tamburello, P Taylor, W Telford, P Temple, J Tentindo-Repond, S Thomas, E Thooris, B Tomoto, M Toole, T Torborg, J Towers, S Trefzger, T Trincaz-Duvoid, S Tuchming, B Tully, C Turcot, AS Tuts, PM Uvarov, L Uvarov, S Uzunyan, S Vachon, B Van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vlimant, JR Von Toerne, E Vreeswijk, M Anh, TV Wahl, HD Walker, R Wang, L Wang, ZM Warchol, J Warsinsky, M Watts, G Wayne, M Weber, M Weerts, H Wegner, M Wermes, N White, A White, V Whiteson, D Wicke, D Wijngaarden, DA Wilson, GW Wimpenny, SJ Wittlin, J Wobisch, M Womersley, J Wood, DR Wyatt, TR Xu, Q Xuan, N Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yen, Y Yip, K Youn, SW Yu, J Yurkewicz, A Zabi, A Zatserklyaniy, A Zdrazil, M Zeitnitz, C Zhang, D Zhang, X Zhao, T Zhao, Z Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Agelou, M Agram, JL Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Anderson, S Andrieu, B Arnoud, Y Askew, A Asman, B Atramentov, O Autermann, C Avila, C Badaud, F Baden, A Baldin, B Balm, PW Banerjee, S Barberis, E Bargassa, P Baringer, P Barnes, C Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beauceron, S Begel, M Bellavance, A Beri, SB Bernardi, G Bernhard, R Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Binder, M Black, KM Blackler, I Blazey, G Blekman, F Blessing, S Bloch, D Blumenschein, U Boehnlein, A Boeriu, O Bolton, TA Borcherding, F Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burnett, TH Busato, E Butler, JM Bystricky, J Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chandra, A Chapin, D Charles, F Cheu, E Chevalier, L Cho, DK Choi, S Christiansen, T Christofek, L Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Coppage, D Corcoran, M Coss, J Cothenet, A Cousinou, MC Crepe-Renaudin, S Cristetiu, M Cummings, MAC Cutts, D da Motta, H Davies, B Davies, G Davis, GA De, K de Jong, P de Jong, SJ De La Cruz-Burelo, E Martins, CD Dean, S Deliot, F Delsart, PA Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doidge, M Dong, H Doulas, S Duflot, L Dugad, SR Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Edwards, T Ellison, J Elmsheuser, J Eltzroth, JT Elvira, VD Eno, S Ermolov, P Eroshin, OV Estrada, J Evans, D Evans, H Evdokimov, A Evdokimov, VN Fast, J Fatakia, SN Feligioni, L Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Fortner, M Fox, H Freeman, W Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gardner, J Gavrilov, V Gay, P Gele, D Gelhaus, R Genser, K Gerber, CE Gershtein, Y Ginther, G Golling, T Gomez, B Gounder, K Goussiou, A Grannis, PD Greder, S Greenlee, H Greenwood, ZD Gregores, EM Gris, P Grivaz, JF Groer, L Grunendahl, S Grunewald, MW Gurzhiev, SN Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Hagopian, S Hall, I Hall, RE Han, C Han, L Hanagaki, K Harder, K Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hensel, C Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hohlfeld, M Hong, SJ Hooper, R Houben, P Hu, Y Huang, J Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jain, V Jakobs, K Jenkins, A Jesik, R Johns, K Johnson, M Jonckheere, A Jonsson, P Jostlein, H Juste, A Kado, MM Kafer, D Kahl, W Kahn, S Kajfasz, E Kalinin, AM Kalk, J Karmanov, D Kasper, J Kau, D Kehoe, R Kermiche, S Kesisoglou, S Khanov, A Kharchilava, A Kharzheev, YM Kim, KH Klima, B Klute, M Kohli, JM Kopal, M Korablev, VM Kotcher, J Kothari, B Koubarovsky, A Kozelov, AV Kozminski, J Krzywdzinski, S Kuleshov, S Kulik, Y Kunori, S Kupco, A Kurca, T Lager, S Lahrichi, N Landsberg, G Lazoflores, J Le Bihan, AC Lebrun, P Lee, SW Lee, WM Leflat, A Lehner, F Leonidopoulos, C Lewis, P Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipaev, VV Lipton, R Lobo, L Lobodenko, A Lokajicek, M Lounis, A Lubatti, HJ Lueking, L Lynker, M Lyon, AL Maciel, AKA Madaras, RJ Mattig, P Magerkurth, A Magnan, AM Makovec, N Mal, PK Malik, S Malyshev, VL Mao, HS Maravin, Y Martens, M Mattingly, SEK Mayorov, AA McCarthy, R McCroskey, R Meder, D Melanson, HL Melnitchouk, A Merkin, M Merritt, KW Meyer, A Miettinen, H Mihalcea, D Mitrevski, J Mokhov, N Molina, J Mondal, NK Montgomery, HE Moore, RW Muanza, GS Mulders, M Mutaf, YD Nagy, E Narain, M Naumann, NA Neal, HA Negret, JP Nelson, S Neustroev, P Noeding, C Nomerotski, A Novaes, SF Nunnemann, T Nurse, E O'Dell, V O'Neil, DC Oguri, V Oliveira, N Oshima, N Garzon, GJOY Padley, P Parashar, N Park, J Park, SK Parsons, J Partridge, R Parua, N Patwa, A Perea, PM Perez, E Peters, O Petroff, P Petteni, M Phaf, L Piegaia, R Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pope, BG da Silva, WLP Prosper, HB Protopopescu, S Przybycien, MB Qian, J Quadt, A Quinn, B Rani, KJ Rapidis, PA Ratoff, PN Reay, NW Reucroft, S Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Royon, C Rubinov, P Ruchti, R Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schamberger, RD Schellman, H Schieferdecker, P Schmitt, C Schukin, AA Schwartzman, A Schwienhorst, R Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shephard, WD Shpakov, D Sidwell, RA Simak, V Sirotenko, V Skubic, P Slattery, P Smith, RP Smolek, K Snow, GR Snow, J Snyder, S Soldner-Rembold, S Song, X Song, Y Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stanton, NR Stark, J Steele, J Steinbruck, G Stevenson, K Stolin, V 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Zielinski, M Zieminska, D Zieminski, A Zitoun, R Zutshi, V Zverev, EG Zylberstejn, A CA D0 Collaboration TI Measurement of the ratio of B+ and B-0 meson lifetimes SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHYSICS; DECAYS AB The ratio of the B+ and B-0 meson lifetimes was measured using data collected in 2002-2004 by the D0 experiment in Run II of the Fermilab Tevatron Collider. These mesons were reconstructed in B ->mu(+)nu D*-X decays, which are dominated by B-0 and B ->mu(+)nu(D) over bar X-0 decays, which are dominated by B+. The ratio of lifetimes is measured to be tau(+)/tau(0)=1.080 +/- 0.016(stat)+/- 0.014(syst). C1 Joint Inst Nucl Res, Dubna, Russia. Inst Theoret & Expt Phys, Moscow, 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. Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil. McGill Univ, Montreal, PQ, Canada. Univ Alberta, Edmonton, AB, Canada. Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada. York Univ, Toronto, ON M3J 2R7, Canada. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Czech Tech Univ, CR-16635 Prague, Czech Republic. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, France. Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, France. Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France. Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France. Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France. CEA, DAPNIA, Serv Phys Particles, Saclay, France. Univ Haute Alsace, Mulhouse, France. Univ Strasbourg, CNRS, IN2P3, IReS, Strasbourg, France. Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France. Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Freiburg, Inst Phys, Freiburg, Germany. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Univ Munich, Munich, Germany. Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany. Punjabi Univ, Chandigarh 160014, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Univ Coll Dublin, Dublin 2, Ireland. Korea Univ, Korea Detector Lab, Seoul 136701, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. FOM Inst NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Petersburg Nucl Phys Inst, St Petersburg, Russia. Stockholm Univ, S-10691 Stockholm, Sweden. Royal Inst Technol, Stockholm, Sweden. Lund Univ, Lund, Sweden. Uppsala Univ, Uppsala, Sweden. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Manchester, Manchester, Lancs, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Calif State Univ Fresno, Fresno, CA 93740 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. Univ Kansas, Manhattan, KS 66506 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 Mississippi, University, MS 38677 USA. Univ Nebraska, Lincoln, NE 68588 USA. Princeton Univ, Princeton, NJ 08544 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. So Methodist Univ, Dallas, TX 75275 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Joint Inst Nucl Res, Dubna, Russia. RI Kuleshov, Sergey/D-9940-2013; Canelli, Florencia/O-9693-2016; Bargassa, Pedrame/O-2417-2016; Juste, Aurelio/I-2531-2015; Merkin, Mikhail/D-6809-2012; De, Kaushik/N-1953-2013; Santoro, Alberto/E-7932-2014; Sznajder, Andre/L-1621-2016; Oguri, Vitor/B-5403-2013; Fisher, Wade/N-4491-2013; Sharyy, Viatcheslav/F-9057-2014; Yip, Kin/D-6860-2013; Novaes, Sergio/D-3532-2012; Telford, Paul/B-6253-2011; Gutierrez, Phillip/C-1161-2011; Leflat, Alexander/D-7284-2012; Deliot, Frederic/F-3321-2014; Nomerotski, Andrei/A-5169-2010; Alves, Gilvan/C-4007-2013; Shivpuri, R K/A-5848-2010; Dudko, Lev/D-7127-2012 OI Fatakia, Sarosh/0000-0003-0430-3191; Bertram, Iain/0000-0003-4073-4941; Madaras, Ronald/0000-0001-7399-2993; Begel, Michael/0000-0002-1634-4399; Haas, Andrew/0000-0002-4832-0455; Weber, Michele/0000-0002-2770-9031; Melnychuk, Oleksandr/0000-0002-2089-8685; Bassler, Ursula/0000-0002-9041-3057; Filthaut, Frank/0000-0003-3338-2247; Naumann, Axel/0000-0002-4725-0766; Kuleshov, Sergey/0000-0002-3065-326X; Canelli, Florencia/0000-0001-6361-2117; Sawyer, Lee/0000-0001-8295-0605; Bargassa, Pedrame/0000-0001-8612-3332; Hedin, David/0000-0001-9984-215X; Wahl, Horst/0000-0002-1345-0401; Juste, Aurelio/0000-0002-1558-3291; de Jong, Sijbrand/0000-0002-3120-3367; Landsberg, Greg/0000-0002-4184-9380; Blessing, Susan/0000-0002-4455-7279; Gershtein, Yuri/0000-0002-4871-5449; Duperrin, Arnaud/0000-0002-5789-9825; Hoeneisen, Bruce/0000-0002-6059-4256; Malik, Sudhir/0000-0002-6356-2655; Leonidopoulos, Christos/0000-0002-7241-2114; Blekman, Freya/0000-0002-7366-7098; Blazey, Gerald/0000-0002-7435-5758; Evans, Harold/0000-0003-2183-3127; Beuselinck, Raymond/0000-0003-2613-7446; Heinson, Ann/0000-0003-4209-6146; grannis, paul/0000-0003-4692-2142; Qian, Jianming/0000-0003-4813-8167; Bean, Alice/0000-0001-5967-8674; Strovink, Mark/0000-0001-7020-7769; De, Kaushik/0000-0002-5647-4489; Sznajder, Andre/0000-0001-6998-1108; Sharyy, Viatcheslav/0000-0002-7161-2616; Yip, Kin/0000-0002-8576-4311; Novaes, Sergio/0000-0003-0471-8549; Dudko, Lev/0000-0002-4462-3192 NR 13 TC 80 Z9 80 U1 0 U2 2 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. 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Wong, QK Brau, J Frey, R Igonkina, O Lu, M 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 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 Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, M Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, J Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA 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 Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BaBar Collaboration TI Branching fractions and CP asymmetries in B-0 ->pi(0)pi(0), B+->pi(+)pi(0), and B+-> K+pi(0) decays and isospin analysis of the B ->pi pi system SO PHYSICAL REVIEW LETTERS LA English DT Article ID B-DECAYS AB Based on a sample of 227x10(6) B(B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B-0 ->pi(0)pi(0))=(1.17 +/- 0.32 +/- 0.10)x10(-6), and the asymmetry C-pi(0)pi(0)=-0.12 +/- 0.56 +/- 0.06. The B-0 ->pi(0)pi(0) signal has a significance of 5.0 sigma. We also measure B(B+->pi(+)pi(0))=(5.8 +/- 0.6 +/- 0.4)x10(-6), B(B+-> K+pi(0))=(12.0 +/- 0.7 +/- 0.6)x10(-6), and the charge asymmetries A(pi)(+)pi(0)=-0.01 +/- 0.10 +/- 0.02 and A(K)(+)pi(0)=0.06 +/- 0.06 +/- 0.01. Using isospin relations, we find an upper bound on the angle difference vertical bar alpha-alpha(eff)vertical bar of 35 degrees at the 90% C.L. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, E-08193 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Univ Bari, 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 Natl 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. 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. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, 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. Univ Milan, 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. Univ Naples Federico II, Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 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 & Hautes Energies, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Scuola Normale Super Pisa, Dipartimento Fis, 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. Univ Roma La Sapienza, 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, Dipartmento Fis, I-34127 Trieste, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, E-46100 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. RP Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Neri, Nicola/G-3991-2012; Rotondo, Marcello/I-6043-2012; Sarti, Alessio/I-2833-2012; Patrignani, Claudia/C-5223-2009; de Groot, Nicolo/A-2675-2009; de Sangro, Riccardo/J-2901-2012; Forti, Francesco/H-3035-2011; Della Ricca, Giuseppe/B-6826-2013; Cavallo, Nicola/F-8913-2012; Peters, Klaus/C-2728-2008; Bellini, Fabio/D-1055-2009; Saeed, Mohammad Alam/J-7455-2012; Lista, Luca/C-5719-2008; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; 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; Lusiani, Alberto/A-3329-2016; Di Lodovico, Francesca/L-9109-2016; M, Saleem/B-9137-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Sarti, Alessio/0000-0001-5419-7951; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Forti, Francesco/0000-0001-6535-7965; Della Ricca, Giuseppe/0000-0003-2831-6982; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; 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; Lusiani, Alberto/0000-0002-6876-3288; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 28 TC 86 Z9 86 U1 0 U2 7 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 13 PY 2005 VL 94 IS 18 AR 181802 DI 10.1103/PhysRevLett.94.181802 PG 7 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300014 PM 15904359 ER PT J AU de Jonge, N Allioux, M Oostveen, JT Teo, KBK Milne, WI AF de Jonge, N Allioux, M Oostveen, JT Teo, KBK Milne, WI TI Optical performance of carbon-nanotube electron sources SO PHYSICAL REVIEW LETTERS LA English DT Article ID FIELD-EMISSION; BRIGHTNESS; GROWTH; BEAM AB The figure of merit for the electron optical performance of carbon-nanotube (CNT) electron sources is presented. This figure is given by the relation between the reduced brightness and the energy spread in the region of stable emission. It is shown experimentally that a CNT electron source exhibits a highly stable emission process that follows the Fowler-Nordheim theory for field emission, fixing the relationship among the energy spread, the current, and the radius. The performance of the CNT emitter under realistic operating conditions is compared with state-of-the-art electron point sources. It is demonstrated that the reduced brightness is a function of the tunneling parameter, a measure of the energy spread at low temperatures, only, independent of the geometry of the emitter. C1 Philips Res Labs, NL-5656 AA Eindhoven, Netherlands. Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England. RP de Jonge, N (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM dejongen@ornl.gov RI de Jonge, Niels/B-5677-2008 NR 22 TC 51 Z9 51 U1 2 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 13 PY 2005 VL 94 IS 18 AR 186807 DI 10.1103/PhysRevLett.94.186807 PG 4 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300052 PM 15904397 ER PT J AU Feldman, DE Scheidl, S Vinokur, VM AF Feldman, DE Scheidl, S Vinokur, VM TI Rectification in Luttinger liquids SO PHYSICAL REVIEW LETTERS LA English DT Article ID CONDUCTANCE; RATCHETS AB We investigate the rectification of an ac bias in Luttinger liquids in the presence of an asymmetric potential (the ratchet effect). We show that a strong repulsive electron interaction enhances the ratchet current in comparison with Fermi-liquid systems, and the dc I-V curve is strongly asymmetric in the low-voltage regime even for a weak asymmetric potential. At higher voltages the ratchet current exhibits an oscillatory voltage dependence. C1 Brown Univ, Dept Phys, Providence, RI 02912 USA. Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Brown Univ, Dept Phys, Providence, RI 02912 USA. NR 27 TC 21 Z9 21 U1 0 U2 2 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 13 PY 2005 VL 94 IS 18 AR 186809 DI 10.1103/PhysRevLett.94.186809 PG 4 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300054 PM 15904399 ER PT J AU Gregoryanz, E Degtyareva, O Somayazulu, M Hemley, RJ Mao, HK AF Gregoryanz, E Degtyareva, O Somayazulu, M Hemley, RJ Mao, HK TI Melting of dense sodium SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-PRESSURE PHASES; DIAMOND-ANVIL CELL; ALKALI-METALS; LITHIUM; TRANSITION; HYDROGEN; SUPERCONDUCTIVITY; SYSTEMATICS; POTASSIUM; CURVES AB High-pressure high-temperature synchrotron diffraction measurements reveal a maximum on the melting curve of Na in the bcc phase at similar to 31 GPa and 1000 K and a steep decrease in melting temperature in its fcc phase. The results extend the melting curve by an order of magnitude up to 130 GPa. Above 103 GPa, Na crystallizes in a sequence of phases with complex structures with unusually low melting temperatures, reaching 300 K at 118 GPa, and an increased melting temperature is observed with further increases in pressure. C1 Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA. Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA. RP Carnegie Inst Sci, Geophys Lab, 5251 Broad Branch Rd NW, Washington, DC 20015 USA. NR 47 TC 112 Z9 114 U1 3 U2 23 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 13 PY 2005 VL 94 IS 18 AR 185502 DI 10.1103/PhysRevLett.94.185502 PG 4 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300038 PM 15904383 ER PT J AU Li, JB Wei, SH Wang, LW AF Li, JB Wei, SH Wang, LW TI Stability of the DX- center in GaAs quantum dots SO PHYSICAL REVIEW LETTERS LA English DT Article ID III-V SEMICONDUCTORS; ALXGA1-XAS ALLOYS; LATTICE-RELAXATION; SI; NANOCRYSTALS; DYNAMICS; DONOR; ZNTE AB Using a first-principles band structure method, we study how the size of quantum dots affects the stability and transition energy levels of defects in GaAs. We show that, although a negatively charged DX- center is unstable in bulk GaAsSi with respect to the tetrahedral coordinated Si-Ga(-), it becomes stable when the dot size is small enough. The critical size of the dot is about 14.5 nm in diameter. The reason for the stabilization is the strong quantum-confinement effect, which increases the formation energy of Si-Ga(-) more than that of the DX- defect center. Our studies show that defect properties in quantum dots could be significantly different from those in bulk semiconductors. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Natl Renewable Energy Lab, Golden, CO 80401 USA. EM jingbo_li@nrel.gov NR 24 TC 33 Z9 33 U1 1 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 13 PY 2005 VL 94 IS 18 AR 185501 DI 10.1103/PhysRevLett.94.185501 PG 4 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300037 PM 15904382 ER PT J AU Rajaram, D Burnstein, RA Chakravorty, A Chan, A Chen, YC Choong, WS Clark, K Dukes, EC Durandet, C Felix, J Gidal, G Gu, P Gustafson, HR Ho, C Holmstrom, T Huang, M James, C Jenkins, CM Kaplan, DM Lederman, LM Leros, N Longo, MJ Lopez, F Lu, LC Luebke, W Luk, KB Nelson, KS Park, HK Perroud, JP Rubin, HA Teng, PK Volk, J White, CG White, SL Zyla, P AF Rajaram, D Burnstein, RA Chakravorty, A Chan, A Chen, YC Choong, WS Clark, K Dukes, EC Durandet, C Felix, J Gidal, G Gu, P Gustafson, HR Ho, C Holmstrom, T Huang, M James, C Jenkins, CM Kaplan, DM Lederman, LM Leros, N Longo, MJ Lopez, F Lu, LC Luebke, W Luk, KB Nelson, KS Park, HK Perroud, JP Rubin, HA Teng, PK Volk, J White, CG White, SL Zyla, P CA HyperCP Collaboration TI Search for the lepton-number-violating decay Xi(-)-> p mu(-)mu(-) SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAJORANA NEUTRINO MASS; DOUBLE-BETA DECAY; 0.1 EV RANGE; UPPER-BOUNDS; LIMITS AB A sensitive search for the lepton-number-violating decay Xi(-)-> p mu(-)mu(-) has been performed using a sample of similar to 10(9) Xi(-) hyperons produced in 800 GeV/c p-Cu collisions. We obtain B(Xi(-)-> p mu(-)mu(-))< 4.0x10(-8) at 90% confidence, improving on the best previous limit by 4 orders of magnitude. C1 IIT, Chicago, IL 60616 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Univ Calif Berkeley, Berkeley, CA 94720 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Guanajuato, Leon 37000, Mexico. Univ Lausanne, CH-1015 Lausanne, Switzerland. Lawrence Beverley Natl Lab, Berkeley, CA 94720 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Univ S Alabama, Mobile, AL 36688 USA. Univ Virginia, Charlottesville, VA 22904 USA. RP IIT, Chicago, IL 60616 USA. EM kaplan@iit.edu RI Lu, Lanchun/E-3551-2011 NR 29 TC 6 Z9 6 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 13 PY 2005 VL 94 IS 18 AR 181801 DI 10.1103/PhysRevLett.94.181801 PG 5 WC Physics, Multidisciplinary SC Physics GA 925ST UT WOS:000229074300013 PM 15904358 ER PT J AU Dale, VH Crisafulli, CM Swanson, FJ AF Dale, VH Crisafulli, CM Swanson, FJ TI Ecology - 25 years of ecological change at Mount St. Helens SO SCIENCE LA English DT Editorial Material C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. US Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Olympia, WA 98512 USA. US Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331 USA. RP Dale, VH (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM dalevh@ornl.gov RI Dale, Virginia/B-6023-2009 NR 3 TC 15 Z9 18 U1 1 U2 17 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 13 PY 2005 VL 308 IS 5724 BP 961 EP 962 DI 10.1126/science.1109684 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 927JR UT WOS:000229190700024 PM 15890864 ER PT J AU Flasar, FM Achterberg, RK Conrath, BJ Gierasch, PJ Kunde, VG Nixon, CA Bjoraker, GL Jennings, DE Romani, PN Simon-Miller, AA Bezard, B Coustenis, A Irwin, PGJ Teanby, NA Brasunas, J Pearl, JC Segura, ME Carlson, RC Mamoutkine, A Schinder, PJ Barucci, A Courtin, R Fouchet, T Gautier, D Lellouch, E Marten, A Prange, R Vinatier, S Strobel, DF Calcutt, SB Read, PL Taylor, FW Bowles, N Samuelson, RE Orton, GS Spilker, LJ Owen, TC Spencer, JR Showalter, MR Ferrari, C Abbas, MM Raulin, F Edgington, S Ade, P Wishnow, EH AF Flasar, FM Achterberg, RK Conrath, BJ Gierasch, PJ Kunde, VG Nixon, CA Bjoraker, GL Jennings, DE Romani, PN Simon-Miller, AA Bezard, B Coustenis, A Irwin, PGJ Teanby, NA Brasunas, J Pearl, JC Segura, ME Carlson, RC Mamoutkine, A Schinder, PJ Barucci, A Courtin, R Fouchet, T Gautier, D Lellouch, E Marten, A Prange, R Vinatier, S Strobel, DF Calcutt, SB Read, PL Taylor, FW Bowles, N Samuelson, RE Orton, GS Spilker, LJ Owen, TC Spencer, JR Showalter, MR Ferrari, C Abbas, MM Raulin, F Edgington, S Ade, P Wishnow, EH TI Titan's atmospheric temperatures, winds, and composition SO SCIENCE LA English DT Article ID HETERODYNE OBSERVATIONS; VERTICAL PROFILE; POLAR VORTEX; PHOTOCHEMISTRY; OCCULTATION; STRATOSPHERE; MILLIMETER; CHEMISTRY; DYNAMICS; SYSTEM AB Temperatures obtained from early Cassini infrared observations of Titan show a stratopause at an altitude of 310 kilometers (and 186 kelvin at 15 degrees S). Stratospheric temperatures are coldest in the winter northern hemisphere, with zonal winds reaching 160 meters per second. The concentrations of several stratospheric organic compounds are enhanced at mid- and high northern latitudes, and the strong zonal winds may, inhibit mixing between these latitudes and the rest of Titan. Above the south pole, temperatures in the stratosphere are 4 to 5 kelvin cooler than at the equator. The stratospheric mole fractions of methane and carbon monoxide are (1.6 +/- 0.5) x 10(-2) and (4.5 +/- 1.5) x 10(-5), respectively. C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Sci Syst & Applicat, Lanham, MD 20706 USA. Cornell Univ, Dept Astron, Ithaca, NY 14853 USA. Univ Maryland, Dept Astron, College Pk, MD 20742 USA. Observ Paris, LESIA, CNRS, UMR 8109, F-91925 Meudon, France. Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England. QSS Grp, Lanham, MD 20706 USA. Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA. SW Res Inst, Dept Space Studies, Boulder, CO 80302 USA. Search Extraterr Intelligence Inst, Mountain View, CA 94043 USA. CEA, Serv Astrophys, F-91191 Gif Sur Yvette, France. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Univ Paris 07, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, France. Univ Paris 12, Lab Interuniv Syst Atmospher, CNRS, UMR 7583, F-94010 Creteil, France. Univ Cardiff, Dept Phys & Astron, Cardiff CF24 3YB, S Glam, Wales. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif Berkeley, Space Sci Lab, Livermore, CA 94551 USA. RP Flasar, FM (reprint author), NASA, Goddard Space Flight Ctr, Code 693, Greenbelt, MD 20771 USA. EM f.m.flasar@nasa.gov RI Nixon, Conor/A-8531-2009; brasunas, john/I-2798-2013; Simon, Amy/C-8020-2012; Ferrari, Cecile/P-9735-2016; Fouchet, Thierry/C-6374-2017; Flasar, F Michael/C-8509-2012; Romani, Paul/D-2729-2012; Bjoraker, Gordon/D-5032-2012; Jennings, Donald/D-7978-2012 OI Nixon, Conor/0000-0001-9540-9121; Simon, Amy/0000-0003-4641-6186; Ferrari, Cecile/0000-0001-5962-7439; Fouchet, Thierry/0000-0001-9040-8285; Calcutt, Simon/0000-0002-0102-3170; Teanby, Nicholas/0000-0003-3108-5775; Irwin, Patrick/0000-0002-6772-384X; NR 33 TC 231 Z9 232 U1 2 U2 31 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD MAY 13 PY 2005 VL 308 IS 5724 BP 975 EP 978 DI 10.1126/science.1111150 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 927JR UT WOS:000229190700032 PM 15894528 ER PT J AU Volkan, M Stokes, DL Vo-Dinh, T AF Volkan, M Stokes, DL Vo-Dinh, T TI A sol-gel derived AgCl photochromic coating on glass for SERS chemical sensor application SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article DE Raman; SERS substrate; sol-gel; photochromic; HNO3 ID ENHANCED RAMAN-SCATTERING; SILVER NANOPARTICLES; SPECTROSCOPY; SUBSTRATE; FILMS; SPECTROMETRY; PARTICLES; GOLD AB A new optically translucent material has been prepared that acts as a substrate for surface-enhanced Raman spectroscopy. This material is a silica matrix, synthesized by the sol-gel method and containing in situ precipitated AgCl particles which serve as precursors for nanoparticles of elemental silver. Reduction of AgCl to silver nanoparticles is achieved by UV irradiation. The SERS-active medium was distributed on glass supports (cover glass slips, 0.5 turn thick), hence producing thin, sturdy, and optically translucent substrates. SERS activity was evaluated by using brilliant cresyl blue and I-aminopyrene as model compounds. Parameters including the sol-gel composition, the aging period of the sol-gel, and the UV exposure time for photoreduction of the SERS medium were thoroughly investigated. These new substrates have exhibited long shelf lives; furthermore, they can be easily regenerated through a redox cycle involving chemical oxidation and photoreduction steps. In addition to use in direct chemical analysis, this novel type of SERS substrate can be used for indirect monitoring of HNO3 acid vapor via measurement of the SERS signal of 1-aminoyrene, which is attenuated as the substrate is oxidized by the acid vapor. © 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. Middle E Tech Univ, Dept Chem, TR-06531 Ankara, Turkey. RP Stokes, DL (reprint author), Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, POB 2008, Oak Ridge, TN 37831 USA. EM dstokes547@aol.com NR 25 TC 18 Z9 19 U1 5 U2 22 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD MAY 13 PY 2005 VL 106 IS 2 BP 660 EP 667 DI 10.1016/j.snb.2004.09.019 PG 8 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA 924HG UT WOS:000228969100024 ER PT J AU West, DL Montgomery, FC Armstrong, TR AF West, DL Montgomery, FC Armstrong, TR TI Use of La0.85Sr0.15CrO3 in high-temperature NOx sensing elements SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article DE gas sensors; lanthanum strontium chromite; nitrogen dioxide; nitrogen monoxide ID STABILIZED ZIRCONIA; OXIDE ELECTRODE; SENSORS; GASES AB This work focuses on use of the electronically-conducting oxide La0.85Sr0.15CrO3 (LSQ in solid electrolyte-based NO, sensing elements intended for operation at T &SIM; 650&DEG; C. Two different investigations are described, in the first LSC was used as a direct substitute for Pt. The substitution led to decreased sensitivity to NO2 and an enhancement of the NO response, although the NO2 response was still much larger in magnitude and opposite in sign. Fabrication and evaluation of sensing elements with co-planar LSC and Pt electrodes comprised the second investigation. The measured NO, sensing performance of these elements was commensurate with that of the elements fabricated in the first phase of the investigation (e.g., 450 ppm, NO2 in 7 vol% O-2 produced &SIM; 50 mV at 600&DEG; C and the response/recovery times for NO, sensing were improved. The results indicate that LSC could be useful in these types of sensing elements, both as a substitute for, and in combination with, Pt. © 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP West, DL (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, Bldg 4508,MS 6083, Oak Ridge, TN 37831 USA. EM westdl@ornl.gov RI West, David/A-3414-2009 OI West, David/0000-0002-1265-9350 NR 20 TC 21 Z9 24 U1 0 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD MAY 13 PY 2005 VL 106 IS 2 BP 758 EP 765 DI 10.1016/j.snb.2004.09.028 PG 8 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA 924HG UT WOS:000228969100037 ER PT J AU Song, J Bonner, CA Wolinsky, M Jensen, RA AF Song, J Bonner, CA Wolinsky, M Jensen, RA TI The TyrA family of aromatic-pathway dehydrogenases in phylogenetic context SO BMC BIOLOGY LA English DT Article ID 3-DEOXY-D-ARABINO-HEPTULOSONATE 7-PHOSPHATE SYNTHASE; AMINO-ACID BIOSYNTHESIS; AROGENATE DEHYDROGENASE; L-TYROSINE; CYCLOHEXADIENYL DEHYDROGENASE; PREPHENATE DEHYDROGENASE; PSEUDOMONAS-AERUGINOSA; PHENYLALANINE-HYDROXYLASE; ARABIDOPSIS-THALIANA; BACILLUS-SUBTILIS AB Background: The TyrA protein family includes members that catalyze two dehydrogenase reactions in distinct pathways leading to L-tyrosine and a third reaction that is not part of tyrosine biosynthesis. Family members share a catalytic core region of about 30 kDa, where inhibitors operate competitively by acting as substrate mimics. This protein family typifies many that are challenging for bioinformatic analysis because of relatively modest sequence conservation and small size. Results: Phylogenetic relationships of TyrA domains were evaluated in the context of combinatorial patterns of specificity for the two substrates, as well as the presence or absence of a variety of fusions. An interactive tool is provided for prediction of substrate specificity. Interactive alignments for a suite of catalytic-core TyrA domains of differing specificity are also provided to facilitate phylogenetic analysis. tyrA membership in apparent operons (or supraoperons) was examined, and patterns of conserved synteny in relationship to organismal positions on the 16S rRNA tree were ascertained for members of the domain Bacteria. A number of aromatic-pathway genes (hisH(b), aroF, aroQ) have fused with tyrA, and it must be more than coincidental that the freestanding counterparts of all of the latter fused genes exhibit a distinct trace of syntenic association. Conclusion: We propose that the ancestral TyrA dehydrogenase had broad specificity for both the cyclohexadienyl and pyridine nucleotide substrates. Indeed, TyrA proteins of this type persist today, but it is also common to find instances of narrowed substrate specificities, as well as of acquisition via gene fusion of additional catalytic domains or regulatory domains. In some clades a qualitative change associated with either narrowed substrate specificity or gene fusion has produced an evolutionary "jump" in the vertical genealogy of TyrA homologs. The evolutionary history of gene organizations that include tyrA can be deduced in genome assemblages of sufficiently close relatives, the most fruitful opportunities currently being in the Proteobacteria. The evolution of TyrA proteins within the broader context of how their regulation evolved and to what extent TyrA co-evolved with other genes as common members of aromatic-pathway regulons is now feasible as an emerging topic of ongoing inquiry. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Florida, Gainesville, FL 32604 USA. RP Song, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM jian@lanl.gov; cbonner@ufl.edu; murray@lanl.gov; rjensen@ufl.edu FU NLM NIH HHS [G13 LM008297] NR 62 TC 20 Z9 20 U1 0 U2 4 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1741-7007 J9 BMC BIOL JI BMC Biol. PD MAY 12 PY 2005 VL 3 AR 13 DI 10.1186/1741-7007-3-13 PG 30 WC Biology SC Life Sciences & Biomedicine - Other Topics GA 026UL UT WOS:000236367900001 PM 15888209 ER PT J AU Babich, LP Donskoy, EN Kutsyk, IM Roussel-Dupre, RA AF Babich, LP Donskoy, EN Kutsyk, IM Roussel-Dupre, RA TI The feedback mechanism of runaway air breakdown SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ELECTRON AVALANCHE; EQUATION AB The feedback mechanism presented in the paper published by Dwyer ( 2003) is examined in the context of runaway breakdown and thunderstorm electrical conditions. A detailed comparison between previous kinetic and Monte Carlo simulations performed by the authors and others and those of Dwyer are presented. The role of positrons and bremsstrahlung photons in contributing to the runaway avalanche rate is discussed. An alternative and simplified treatment of the feedback mechanism is presented. Our preliminary results are in basic agreement with Dwyer and indicate that positron feedback is more important. In addition, we find that there is a temporal 'stepping' effect associated with the feedback process and that this effect could also lead to a spatial stepping reminiscent of stepped leaders. C1 Russian Fed Nucl Ctr, VNIIEF, Sarov 607180, Nizhegorodskaya, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Russian Fed Nucl Ctr, VNIIEF, Pr Mira 37, Sarov 607180, Nizhegorodskaya, Russia. EM babich@expd.vniief.ru; rrousel-dupre@lanl.gov NR 10 TC 35 Z9 36 U1 1 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD MAY 12 PY 2005 VL 32 IS 9 AR L09809 DI 10.1029/2004GL021744 PG 5 WC Geosciences, Multidisciplinary SC Geology GA 927QJ UT WOS:000229211000001 ER PT J AU Miller, JL Krisch, MJ Butler, LJ Shu, JN AF Miller, JL Krisch, MJ Butler, LJ Shu, JN TI Dissociation channels of the 1-buten-2-yl radical and its photolytic precursor 2-bromo-1-butene SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID DENSITY-FUNCTIONAL GEOMETRIES; 193 NM PHOTODISSOCIATION; TRANSITION-STATES; HCL ELIMINATION; ALLYL CHLORIDE; PROPYNE; 2-CHLOROPROPENE; 1,2-BUTADIENE; HYDROCARBONS; SPECTROSCOPY AB The work presented here is the first in a series of studies that use a molecular beam scattering technique to investigate the unimolecular reaction dynamics of C4H7 radical isomers. Photodissociation of the halogenated precursor 2-bromo-1-butene at 193 nm under collisionless conditions produced 1-buten-2-yl radicals with a range of internal energies spanning the predicted barriers to the unimolecular reaction channels of the radical. Resolving the velocities of the stable C4H7 radicals, as well as those of the products, allows for the identification of the energetic onset of each dissociation channel. The data show that radicals with at least 30.7 &PLUSMN; 2 kcal/mol of internal energy underwent C-C fission to form allene + methyl, and radicals with at least 36.7 &PLUSMN; 4 kcal/mol of internal energy underwent C-H fission to form H + 1-butyne and H + 1,2-butadiene; both of these observed barriers agree well with the G3//B3LYP calculations of Miller. HBr elimination from the parent molecule was observed, producing vibrationally excited 1-butyne and 1,2-butadiene. In the subsequent dissociation of these C4H6 isomers, the major channel was C-C fission to form propargyl + methyl, and there is also evidence of at least one of the possible H + C4H5 channels. A minor C-Br fission channel produces 1-buten-2-yl radicals in an excited electronic state and with low kinetic energy; these radicals exhibit markedly different dissociation dynamics than do the radicals produced in their ground electronic state. C1 Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Chem, Chicago, IL 60637 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Butler, LJ (reprint author), Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. EM L-Butler@uchicago.edu NR 27 TC 12 Z9 12 U1 1 U2 9 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 12 PY 2005 VL 109 IS 18 BP 4038 EP 4048 DI 10.1021/jp0460137 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 924MN UT WOS:000228983000003 PM 16833726 ER PT J AU Dixon, DA de Jong, WA Peterson, KA McMahon, TB AF Dixon, DA de Jong, WA Peterson, KA McMahon, TB TI Methyl cation affinities of rare gases and nitrogen and the heat of formation of diazomethane SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID CORRELATED MOLECULAR CALCULATIONS; MULTINUCLEAR MAGNETIC-RESONANCE; GAUSSIAN-BASIS SETS; DIATOMIC DISSOCIATION-ENERGIES; COUPLED-CLUSTER THEORY; AB-INITIO CALCULATIONS; CONSISTENT BASIS-SETS; WAVE-FUNCTIONS; SYSTEMATIC SEQUENCES; ATOMIZATION ENERGIES AB The methyl cation affinities of the rare gases have been calculated at 0 and 298 K by using coupled cluster theory including noniterative, quasiperturbative triple excitations with the new correlation-consistent basis sets for Xe up through aug-cc-pV5Z in some cases. To achieve near chemical accuracy (+/- 1 kcal/mol) in the thermodynamic properties, we add to the estimated complete basis set valence binding energies, based on frozen core coupled cluster theory energies, two corrections: (1) a core/valence correction and (2) a scalar relativistic correction. Vibrational zero-point energies were computed at the coupled cluster level of theory at the CCSD(T)/aug-cc-pVDZ level. The calculated rare gas methyl cation affinities (MCA in kcal/mol) at 298 K are the following: MCA(He) = 1.7, MCA(Ne) = 2.5, MCA(Ar) = 16.9, MCA(Kr) = 25.5, and MCA(Xe) = 36.6. Because of the importance of the MCA(N-2) in the experimental measurements of the MCA scale, we calculated a number of quantities associated with CH3N2+ and CH2N2. The calculated values for diazomethane at 298 K are: Delta H-f(CH2N2) = 65.3 kcal/mol, PA(CH2N2) = 211.9 kcal/mol, and MCA(N-2) = 43.2 kcal/mol. C1 Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA. Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Univ Waterloo, Dept Chem, Waterloo, ON N2G 4V2, Canada. RP Dixon, DA (reprint author), Univ Alabama, Dept Chem, Shelby Hall,POB 870336, Tuscaloosa, AL 35487 USA. EM dadixon@bama.ua.edu RI DE JONG, WIBE/A-5443-2008; Forgrave, Sarah/I-3165-2012; McMahon, Terry/F-9904-2010 OI DE JONG, WIBE/0000-0002-7114-8315; McMahon, Terry/0000-0002-0911-2733 NR 81 TC 23 Z9 23 U1 0 U2 3 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 12 PY 2005 VL 109 IS 18 BP 4073 EP 4080 DI 10.1021/jp044561e PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 924MN UT WOS:000228983000006 PM 16833729 ER PT J AU Arnold, T Cook, RE Larese, JZ AF Arnold, T Cook, RE Larese, JZ TI Thermodynamic investigation of thin films of ethane adsorbed on magnesium oxide SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID NEUTRON-SCATTERING; SUBMONOLAYER COVERAGES; CRYSTALLINE-STRUCTURES; ADSORPTION-ISOTHERM; HEAT-CAPACITY; GRAPHITE; METHANE; MGO(100); DIFFRACTION; SURFACES AB The layering properties of ethane on MgO(100) were measured between 91 and 144 K using high-resolution adsorption isotherms. In contrast to previous studies, the results demonstrate that only three layers are formed. The thermodynamic functions derived from the data (isosteric heat, differential enthalpy, and entropy of adsorption) compare well with literature values and show a steady trend toward the bulk properties as the number of layers increased. Phase transitions for two of the layers were identified by monitoring the changes in the two-dimensional isothermal compressibility as a function of chemical potential. Both of these phase transitions occur at approximately 127 K and within 1 K of each other. Through the use of neutron diffraction, it is possible to identify at least one solid surface phase that melts at approximately 75 K. The transition at 127 K is therefore a transition between a liquidlike phase and a hyper-critical fluid. A comparison is made between the present data and our recent study of methane on MgO. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RP Larese, JZ (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM jzl@utk.edu OI Arnold, Thomas/0000-0001-8295-3822 NR 40 TC 15 Z9 15 U1 1 U2 4 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 12 PY 2005 VL 109 IS 18 BP 8799 EP 8805 DI 10.1021/jp046065w PG 7 WC Chemistry, Physical SC Chemistry GA 924MM UT WOS:000228982900042 PM 16852045 ER PT J AU He, Y Li, HW Yeung, ES AF He, Y Li, HW Yeung, ES TI Motion of single DNA molecules at a liquid-solid interface as revealed by variable-angle evanescent-field microscopy SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID TOTAL-INTERNAL-REFLECTION; AQUEOUS FLUORESCENCE MICROSCOPY; LONG-RANGE FORCES; CELL-SUBSTRATE CONTACTS; WAVE LIGHT-SCATTERING; SECRETORY GRANULES; PROTEIN MOLECULES; TIRM MEASUREMENTS; ACTIN CORTEX; VA-TIRFM AB A variable-angle total-internal-reflection fluorescence microscope (VATIRFM) capable of providing a large range of incident angles was constructed for imaging single DNA molecule dynamics at a solid/liquid interface. An algorithm using a public-domain image-processing program, ImageJ, was developed for single-molecule counting. The experimental counts at various incident angles with different evanescent-field layer (EFL) thicknesses are affected by molecular diffusion. The dynamics of molecules near the surface and the observed counts in the VATIRFM are elucidated using a limited one-dimensional random-walk diffusion model. The simulation fits well with the experimental counting results. Further analysis using the simulation reveals the details of single-molecule motion. One implication is that the measured intensities cannot be used directly to determine the distances of molecules from the surface, though the majority of fluorescence does come from the EFL. Another implication is that rather than providing molecular concentrations within EFL the experimental counting results depict the distance-dependent dynamics of molecules near the surface. Thus, the VATIRFM could be a powerful technique to study the surface repulsion/attraction of molecules within a few hundred nanometers of the surface. Further studies show that molecules at low ionic strengths experience electrostatic repulsion at distances much further away from the surface than the calculated thickness of the electrical double layer. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. RP Yeung, ES (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. EM yeung@ameslab.gov NR 62 TC 25 Z9 25 U1 2 U2 12 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 12 PY 2005 VL 109 IS 18 BP 8820 EP 8832 DI 10.1021/jp0447284 PG 13 WC Chemistry, Physical SC Chemistry GA 924MM UT WOS:000228982900045 PM 16852048 ER PT J AU Liu, HZ Tse, JS Hu, JZ Liu, ZX Wang, LH Chen, JH Weidner, DK Meng, Y Hausermann, D Mao, HK AF Liu, HZ Tse, JS Hu, JZ Liu, ZX Wang, LH Chen, JH Weidner, DK Meng, Y Hausermann, D Mao, HK TI Structural refinement of the high-pressure phase of aluminum trihydroxide: In-situ high-pressure angle dispersive synchrotron X-ray diffraction and theoretical studies SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID CRYSTAL-STRUCTURE; AB-INITIO; GIBBSITE; AL(OH)3; BAYERITE; NORDSTRANDITE; MINERALS; DOYLEITE AB In-situ high-pressure synchrotron angle-dispersive X-ray diffraction for gibbsite (aluminum trihydroxide) was performed at room temperature up to 20 GPa. A pressure-induced phase transition was observed at 2.6 GPa. The new high-pressure phase can be recovered at ambient pressure. Rielveld refinement shows that the new phase of Al(OH)(3) has an orthorhombic structure, spacegroup Pbca, and the lattice parameters at ambient condition are a = 868.57(5) pm, b = 505.21(4) pm, c = 949.54(6) pm, V = 416.67(6) x 10(6) pm(3) with Z = 8. The compressibility of gibbsite and the high-pressure polymorph was analyzed, and their bulk moduli were estimated as 49.8 +/- 1.8 and 81.0 +/- 5.2 GPa, respectively. First-principles calculations of the high-pressure phase were performed to determine the hydrogen positions and to confirm the structural stability of the new phase. C1 Argonne Natl Lab, HPCAT, Adv Photon Source, Argonne, IL 60439 USA. Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA. Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA. RP Liu, HZ (reprint author), Argonne Natl Lab, HPCAT, Adv Photon Source, Bldg 434E, Argonne, IL 60439 USA. EM hliu@hpcat.aps.anl.gov RI Wang, Luhong/E-6234-2011; Liu, Haozhe/E-6169-2011 NR 22 TC 11 Z9 11 U1 0 U2 9 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 12 PY 2005 VL 109 IS 18 BP 8857 EP 8860 DI 10.1021/jp0501594 PG 4 WC Chemistry, Physical SC Chemistry GA 924MM UT WOS:000228982900050 PM 16852053 ER PT J AU Yang, SW Iglesia, E Bell, AT AF Yang, SW Iglesia, E Bell, AT TI Oxidative dehydrogenation of propane over V2O5/MoO3/Al2O3 and V2O5/Cr2O3/Al2O3: Structural characterization and catalytic function SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID MOLYBDENUM OXIDE CATALYSTS; RAMAN-SPECTROSCOPY; SELECTIVE OXIDATION; CRO3/AL2O3 CATALYSTS; AMBIENT CONDITIONS; SUPPORTED VANADIA; REDOX PROPERTIES; ISOTOPIC TRACER; LIGHT ALKANES; ACTIVE-SITES AB The structure and catalytic properties of binary dispersed oxide structures prepared by sequential deposition of VOx and MoOx or VOx and CrOx on Al2O3 were examined using Raman and UV-visible spectroscopies, the dynamics of stoichiometric reduction in H-2, and the oxidative dehydrogenation of propane. VOx domains on Al2O3 modified by an equivalent MoOx monolayer led to dispersed binary structures at all surface densities. MOO,, layers led to higher reactivity for VO,, domains present at low VO, surface densities by replacing V-O-Al structures with more reactive V-O-Mo species. At higher surface densities, V-O-V structures in prevalent polyvanadates were replaced with less reactive V-O-Mo, leading to lower reducibility and oxidative dehydrogenation rates. Raman, reduction, and UV-visible data indicate that polyvanadates predominant on Al2O3 convert to dispersed binary oxide structures when MOO, is deposited before or after VOx deposition; these structures are less reducible and show higher UV-visible absorption energies than polyvanadate structures on Al2O3. The deposition sequence in binary Mo-V catalysts did not lead to significant differences in structure or catalytic rates, suggesting that the two active oxide components become intimately mixed. The deposition of CrOx on Al2O3 led to more reactive VOx domains than those deposited on pure Al2O3 at similar VOx surface densities. At all surface densities, the replacement of V-O-Al or V-O-V structures with V-O-Cr increased the reducibility and catalytic reactivity of VOx domains; it also led to higher propene selectivities via the selective inhibition of secondary C3H6 combustion pathways, prevalent in VOx-Al2O3, and Of C3H8 combustion routes that lead to low alkene selectivities on CrOx-Al2O3. VOx and CrOx mix significantly during synthesis or thermal treatment to form CrVO4 domains. The deposition sequence, however, influences catalytic selectivities and reduction rates, suggesting the retention of some of the component deposited last as unmixed domains exposed at catalyst surfaces. These findings suggest that the reduction and catalytic properties of active VOx domains can be modified significantly by the formation of binary dispersed structures. VOx-CrOx structures, in particular, lead to higher oxidative dehydrogenation rates and selectivities than do VOx domains present at similar surface densities on pure Al2O3 supports. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RP Iglesia, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. EM iglesia@cchem.berkeley.edu; bell@cchem.berkeley.edu RI Iglesia, Enrique/D-9551-2017 OI Iglesia, Enrique/0000-0003-4109-1001 NR 74 TC 53 Z9 54 U1 5 U2 63 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 12 PY 2005 VL 109 IS 18 BP 8987 EP 9000 DI 10.1021/jp040708q PG 14 WC Chemistry, Physical SC Chemistry GA 924MM UT WOS:000228982900068 PM 16852071 ER PT J AU Vestrand, WT Wozniak, PR Wren, JA Fenimore, EE Sakamoto, T White, RR Casperson, D Davis, H Evans, S Galassi, M McGowan, KE Schier, JA Asa, JW Barthelmy, SD Cummings, JR Gehrels, N Hullinger, D Krimm, HA Markwardt, CB McLean, K Palmer, D Parsons, A Tueller, J AF Vestrand, WT Wozniak, PR Wren, JA Fenimore, EE Sakamoto, T White, RR Casperson, D Davis, H Evans, S Galassi, M McGowan, KE Schier, JA Asa, JW Barthelmy, SD Cummings, JR Gehrels, N Hullinger, D Krimm, HA Markwardt, CB McLean, K Palmer, D Parsons, A Tueller, J TI A link between prompt optical and prompt gamma-ray emission in gamma-ray bursts SO NATURE LA English DT Article ID EARLY AFTERGLOW; GRB-021211; DISCOVERY; RADIATION; RAPTOR; SKY AB The prompt optical emission that arrives with the gamma-rays from a cosmic gamma-ray burst (GRB) is a signature of the engine powering the burst, the properties of the ultra-relativistic ejecta of the explosion, and the ejecta's interactions with the surroundings(1-5). Until now, only GRB 990123 had been detected(6) at optical wavelengths during the burst phase. Its prompt optical emission was variable and uncorrelated with the prompt gamma-ray emission, suggesting that the optical emission was generated by a reverse shock arising from the ejecta's collision with surrounding material. Here we report prompt optical emission from GRB 041219a. It is variable and correlated with the prompt gamma-rays, indicating a common origin for the optical light and the gamma-rays. Within the context of the standard fireball model of GRBs, we attribute this new optical component to internal shocks driven into the burst ejecta by variations of the inner engine. The correlated optical emission is a direct probe of the jet isolated from the medium. The timing of the uncorrelated optical emission is strongly dependent on the nature of the medium. C1 Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM 87545 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Pilot Grp, Unit C, Monrovia, CA 91016 USA. RP Vestrand, WT (reprint author), Los Alamos Natl Lab, Space Sci & Applicat Grp, ISR-1,MS-D466, Los Alamos, NM 87545 USA. EM vestrand@lanl.gov RI Gehrels, Neil/D-2971-2012; Tueller, Jack/D-5334-2012; Barthelmy, Scott/D-2943-2012; Parsons, Ann/I-6604-2012 NR 30 TC 150 Z9 152 U1 0 U2 2 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 12 PY 2005 VL 435 IS 7039 BP 178 EP 180 DI 10.1038/nature03515 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 924ZO UT WOS:000229021100032 PM 15889084 ER PT J AU Blake, CH Bloom, JS Starr, DL Falco, EE Skrutskie, M Fenimore, EE Duchene, G Szentgyorgyi, A Hornstein, S Prochaska, JX McCabe, C Ghez, A Konopacky, Q Stapelfeldt, K Hurley, K Campbell, R Kassis, M Chaffee, F Gehrels, N Barthelmy, S Cummings, JR Hullinger, D Krimm, HA Markwardt, CB Palmer, D Parsons, A McLean, K Tueller, J AF Blake, CH Bloom, JS Starr, DL Falco, EE Skrutskie, M Fenimore, EE Duchene, G Szentgyorgyi, A Hornstein, S Prochaska, JX McCabe, C Ghez, A Konopacky, Q Stapelfeldt, K Hurley, K Campbell, R Kassis, M Chaffee, F Gehrels, N Barthelmy, S Cummings, JR Hullinger, D Krimm, HA Markwardt, CB Palmer, D Parsons, A McLean, K Tueller, J TI An infrared flash contemporaneous with the gamma-rays of GRB 041219a SO NATURE LA English DT Article ID EARLY OPTICAL-EMISSION; EARLY AFTERGLOW; BURST; RADIATION; GRB-021211; MISSION AB The explosion that results in a cosmic gamma-ray burst (GRB) is thought to produce emission from two physical processes: the central engine gives rise to the high-energy emission of the burst through internal shocking(1), and the subsequent interaction of the flow with the external environment produces long-wavelength afterglows(2-4). Although observations of afterglows(5) continue to refine our understanding of GRB progenitors and relativistic shocks, gamma-ray observations alone have not yielded a clear picture of the origin of the prompt emission(6) nor details of the central engine. Only one concurrent visible-light transient has been found(7) and it was associated with emission from an external shock. Here we report the discovery of infrared emission contemporaneous with a GRB, beginning 7.2 minutes after the onset of GRB 041219a ( ref. 8). We acquired 21 images during the active phase of the burst, yielding early multi-colour observations. Our analysis of the initial infrared pulse suggests an origin consistent with internal shocks. C1 Harvard Univ, Coll Observ, Cambridge, MA 02138 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Smithsonian Astrophys Observ, Cambridge, MA 02138 USA. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. WM Keck Observ, Kamuela, HI 96743 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Observ Grenoble, Astrophys Lab, F-38041 Grenoble, France. Gemini Observ, Hilo, HI 96720 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Space Res Assoc, Columbia, MD 21044 USA. RP Bloom, JS (reprint author), Harvard Univ, Coll Observ, Cambridge, MA 02138 USA. EM jbloom@astro.berkeley.edu RI Barthelmy, Scott/D-2943-2012; Gehrels, Neil/D-2971-2012; Tueller, Jack/D-5334-2012; Stapelfeldt, Karl/D-2721-2012; Parsons, Ann/I-6604-2012 NR 30 TC 92 Z9 94 U1 0 U2 3 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 12 PY 2005 VL 435 IS 7039 BP 181 EP 184 DI 10.1038/nature03520 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 924ZO UT WOS:000229021100033 PM 15889085 ER PT J AU Yamahara, K Sholklapper, TZ Jacobson, CP Visco, SJ De Jonghe, LC AF Yamahara, K Sholklapper, TZ Jacobson, CP Visco, SJ De Jonghe, LC TI Ionic conductivity of stabilized zirconia networks in composite SOFC electrodes SO SOLID STATE IONICS LA English DT Article DE composite cathode; LSM; zirconia network conductivity; solid oxide fuel cells; reduced temperature SOFCs ID PERFORMANCE; CATHODES AB The effective oxygen conductivities in the zirconia networks of porous LSM-YSZ and LSM-SYSZ composites [i.e. La0.85Sr0.15MnO3-(Y2O3)(0.08)(ZrO2)(0.92) and La0.85Sr0.15MnO3-Sc2O3)(0.1)(Y2O3)(0.01)(ZrO2)(0.89), respectively] were evaluated by an AC impedance technique using specimens in which LSM was removed by hydrochloric acid leaching. The oxygen conductivities of porous YSZ and SYSZ alone followed a Koh-Fortini relationship. LSM-containing zirconia network conductivities were additionally decreased by the presence of the LSM. Grain boundary resistances were not measurably increased. Network constriction resistances were estimated to have a minor effect for well-formed networks. The significant microstructural differences of the YSZ and SYSZ, when formed with and without LSM, then indicate that the significant decrease in network effective ion conductivity is likely to be attributable to an increase in network interruptions and anomalously high constriction resistances resulting from differential densification promoted by the LSM. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Mat Sci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RP De Jonghe, LC (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. EM dejonghe@lbl.gov NR 9 TC 42 Z9 48 U1 0 U2 12 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 12 PY 2005 VL 176 IS 15-16 BP 1359 EP 1364 DI 10.1016/j.ssi.2005.03.010 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 939TG UT WOS:000230094700003 ER PT J AU Lee, TH Dorris, SE Balachandran, U AF Lee, TH Dorris, SE Balachandran, U TI Thin film preparation and hydrogen pumping characteristics of BaCe0.8Y0.2O3-delta SO SOLID STATE IONICS LA English DT Article DE hydrogen pumping; thin film; proton conductor; barium cerate ID PROTON-CONDUCTING CERAMICS; ELECTRICAL-PROPERTIES; TRANSPORT-PROPERTIES; SOLID ELECTROLYTE; IONIC-CONDUCTION; METHANE; SRCEO3; NONSTOICHIOMETRY; SRCE0.95YB0.05O3; DIMERIZATION AB Thin films of BaCe0.8Y0.2O3-delta (BCY) were prepared by a colloidal spray deposition method. Dense, crack-free BCY films with thickness of approximate to 10 mu m and a grain size of 2-7 mu m were successfully deposited on porous NiO/BCY substrates. Scanning electron microscopy showed that the films have uniform thickness and are well bonded to the substrate. The hydrogen pumping characteristics of the films were investigated at temperatures of 500-700 degrees C, and show that the hydrogen evolution rates agree very well with those expected by Faraday's law up to the current limit (2 A) of the galvanostat. A maximum current density of 2.1 A/cm(2) was measured at 700 degrees C with an applied voltage of 1 V (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Energy Technol Div, Argonne, IL 60439 USA. RP Lee, TH (reprint author), Argonne Natl Lab, Energy Technol Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM thlee@anl.gov NR 30 TC 28 Z9 29 U1 1 U2 12 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 12 PY 2005 VL 176 IS 15-16 BP 1479 EP 1484 DI 10.1016/j.ssi.2005.03.016 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 939TG UT WOS:000230094700018 ER PT J AU Timlin, JA Haaland, DM Sinclair, MB Aragon, AD Martinez, MJ Werner-Washburne, M AF Timlin, JA Haaland, DM Sinclair, MB Aragon, AD Martinez, MJ Werner-Washburne, M TI Hyperspectral microarray scanning: impact on the accuracy and reliability of gene expression data SO BMC GENOMICS LA English DT Article ID MULTIVARIATE CURVE RESOLUTION; DNA MICROARRAYS; IMAGE-ANALYSIS; DESIGN; NORMALIZATION AB Background: Commercial microarray scanners and software cannot distinguish between spectrally overlapping emission sources, and hence cannot accurately identify or correct for emissions not originating from the labeled cDNA. We employed our hyperspectral microarray scanner coupled with multivariate data analysis algorithms that independently identify and quantitate emissions from all sources to investigate three artifacts that reduce the accuracy and reliability of microarray data: skew toward the green channel, dye separation, and variable background emissions. Results: Here we demonstrate that several common microarray artifacts resulted from the presence of emission sources other than the labeled cDNA that can dramatically alter the accuracy and reliability of the array data. The microarrays utilized in this study were representative of a wide cross-section of the microarrays currently employed in genomic research. These findings reinforce the need for careful attention to detail to recognize and subsequently eliminate or quantify the presence of extraneous emissions in microarray images. Conclusion: Hyperspectral scanning together with multivariate analysis offers a unique and detailed understanding of the sources of microarray emissions after hybridization. This opportunity to simultaneously identify and quantitate contaminant and background emissions in microarrays markedly improves the reliability and accuracy of the data and permits a level of quality control of microarray emissions previously unachievable. Using these tools, we can not only quantify the extent and contribution of extraneous emission sources to the signal, but also determine the consequences of failing to account for them and gain the insight necessary to adjust preparation protocols to prevent such problems from occurring. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Lovelace Resp Res Inst, Albuquerque, NM 87108 USA. RP Timlin, JA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jatimli@sandia.gov; dmhaala@sandia.gov; mbsincl@sandia.gov; adaragon@unm.edu; jmartinez@lrri.org; maggieww@unm.edu OI Timlin, Jerilyn/0000-0003-2953-1721 FU NHGRI NIH HHS [HG02262]; NIGMS NIH HHS [GM67593, R01 GM067593] NR 31 TC 21 Z9 23 U1 0 U2 3 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1471-2164 J9 BMC GENOMICS JI BMC Genomics PD MAY 11 PY 2005 VL 6 AR 72 DI 10.1186/1471-2164-6-72 PG 11 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA 935WI UT WOS:000229813700001 PM 15888208 ER PT J AU Ames, RL Way, JD Bluhm, EA Knauss, DM Singh, RP Hensley, JE AF Ames, RL Way, JD Bluhm, EA Knauss, DM Singh, RP Hensley, JE TI Nitric acid dehydration using mixed perfluorosulfonate and -carboxylate ionomer membranes SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID X-RAY-SCATTERING; NAFION MEMBRANES; PERVAPORATION; WATER; TRANSPORT; POLYMERS; BEHAVIOR; METHANOL AB Investigations confirmed the feasibility and potential advantage of using mixed perfluorosulfonate/carboxylate membranes for nitric acid dehydration. Experimentation consisted of in situ generation of pure sulfonate and mixed sulfonate/carboxylate (as high as 71 mol % carboxylate) polymer films from a perfluorosulfonyl fluoride precursor membrane, the characterization of the material, and a study of the transport characteristics of these membranes. The carboxylate concentration was determined using direct Fourier transform infrared and X-ray fluorescence spectroscopy. Nitric acid dehydration transport tests confirmed that bulk fluxes decreased and the water separation factor dramatically increased as the carboxylate side-chain content increased to 53 mol %. C1 Los Alamos Natl Lab, Los Alamos, NM 87575 USA. Colorado Sch Mines, Golden, CO 80401 USA. RP Ames, RL (reprint author), Los Alamos Natl Lab, NMT-2,POB 1663, Los Alamos, NM 87575 USA. EM rames@lanl.gov RI Singh, Rajinder/A-5020-2010; Knauss, Daniel/C-3680-2014 OI Knauss, Daniel/0000-0001-9445-5505 NR 23 TC 9 Z9 9 U1 0 U2 1 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 11 PY 2005 VL 44 IS 10 BP 3672 EP 3680 DI 10.1021/ie0488391 PG 9 WC Engineering, Chemical SC Engineering GA 924MH UT WOS:000228982400034 ER PT J AU Khatri, RA Chuang, SSC Soong, Y Gray, M AF Khatri, RA Chuang, SSC Soong, Y Gray, M TI Carbon dioxide capture by diamine-grafted SBA-15: A combined Fourier transform infrared and mass spectrometry study SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID CO2 ADSORPTION; SORBENTS; REMOVAL AB The adsorption and desorption of CO2 on diamine-grafted SBA-15 have been studied by infrared spectroscopy coupled with mass spectrometry. Diamine was grafted onto the SBA-15 surface by the reaction of [N-(2-aminoethyl)-3-aminopropyl]trimethoxysilane with the surface OH. CO2 is adsorbed on the diamine-grafted SBA-15 as bidentate carbonate and bidentate and monodentate bicarbonates at 25 &DEG; C. Bidentate carbonate and monodentate bicarbonates are the major surface species formed and decomposed during the concentration-swing adsorption/desorption process at 25 &DEG; C. Temperature-programmed desorption revealed that the monodentate and bidentate bicarbonates bound stronger to the diamine-grafted SBA-15 surface than the bidentate carbonate. The amount of CO2 desorbed from the carbonate and bicarbonate between 30 and 120 &DEG; C is 2 times more than that of CO2 adsorbed/desorbed during each cycle of the concentration-swing adsorption/desorption. Desorption at 120 &DEG; C removes the majority of the captured CO2 and regenerates the sorbent for CO2 capture at low temperature. Regeneration of the sorbent with temperature-swing adsorption gives a significantly higher CO2 capture capacity than concentration-swing adsorption. The use of a diamine-grafted sorbent, with an adsorption capacity of more than 1000 μ mol/g of sorbent and a temperature-swing adsorption process, could be a cost-effective alternative to capture CO2 from power plant flue gases. C1 Univ Akron, Dept Chem Engn, Akron, OH 44325 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Chuang, SSC (reprint author), Univ Akron, Dept Chem Engn, Akron, OH 44325 USA. EM schuang@uakron.edu NR 32 TC 141 Z9 152 U1 3 U2 40 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 11 PY 2005 VL 44 IS 10 BP 3702 EP 3708 DI 10.1021/ie048997s PG 7 WC Engineering, Chemical SC Engineering GA 924MH UT WOS:000228982400037 ER PT J AU Howland, MC Sapuri-Butti, AR Dixit, SS Dattelbaum, AM Shreve, AP Parikh, AN AF Howland, MC Sapuri-Butti, AR Dixit, SS Dattelbaum, AM Shreve, AP Parikh, AN TI Phospholipid morphologies on photochemically patterned silane monolayers SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HYBRID BILAYER-MEMBRANES; SELF-ASSEMBLED MONOLAYERS; SUPPORTED PLANAR MEMBRANES; ATOMIC-FORCE MICROSCOPY; PROTEIN ADSORPTION; LIPID-BILAYER; ELLIPSOMETRIC MICROSCOPY; NEUTRON REFLECTIVITY; HYDROPHILIC SURFACES; LATERAL MOBILITY AB We have studied the spreading of phospholipid vesicles on photochemically patterned n-octadecylsiloxane monolayers using epifluorescence and imaging ellipsometry measurements. Self-assembled monolayers of n-octaclecylsiloxanes were patterned using short-wavelength ultraviolet radiation and a photomask to produce periodic arrays of patterned hydrophilic domains separated from hydrophobic surroundings. Exposing these patterned surfaces to a solution of small unilamellar vesicles of phospholipids and their mixtures resulted in a complex lipid layer morphology epitaxially reflecting the underlying pattern of hydrophilicity. The hydrophilic square regions of the photopatterned OTS monolayer reflected lipid bilayer formation, and the hydrophobic OTS residues supported lipid monolayers. We further observed the existence of a boundary region composed of a nonfluid lipid phase and a lipid-free moat at the interface between the lipid monolayer and bilayer morphologies spontaneously corralling the fluid bilayers. The outer-edge of the boundary region was found to be accessible for subsequent adsorption by proteins (e.g., streptavidin and BSA), but the inner-edge closer to the bilayer remained resistant to adsorption by protein or vesicles. Mechanistic implications of our results in terms of the effects of substrate topochemical character are discussed. Furthermore, our results provide a basis for the construction of complex biomembrane models, which exhibit fluidity barriers and differentiate membrane properties based on correspondence between lipid leaflets. We also envisage the use of this construct where two-dimensionally fluid, low-defect lipid layers serve as sacrificial resists for the deposition of protein and other material patterns. C1 Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. EM anparikh@ucdavis.edu RI PARIKH, ATUL/D-2243-2014 OI PARIKH, ATUL/0000-0002-5927-4968 NR 67 TC 69 Z9 69 U1 0 U2 33 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 11 PY 2005 VL 127 IS 18 BP 6752 EP 6765 DI 10.1021/ja043439q PG 14 WC Chemistry, Multidisciplinary SC Chemistry GA 925LY UT WOS:000229055800050 PM 15869298 ER PT J AU Ashby, PD Lieber, CM AF Ashby, PD Lieber, CM TI Ultra-sensitive imaging and interfacial analysis of patterned hydrophilic SAM surfaces using energy dissipation chemical force microscopy SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TAPPING-MODE; HYDRATION; FILMS; RESOLUTION AB Energy dissipation chemical force microscopy has been used to analyze the dissipative properties of chemically similar regions of hydroxyl- and carboxyl-terminated SAMS on gold with a hydroxyl-terminated tip. Energy dissipation imaging quantitatively isolates dissipative interfacial interactions from topography, producing a significantly more informative image than phase imaging. Also, energy dissipation force curves probed the theological properties of the tip-sample interaction. Viscosity of the confined water increased slightly over that of the bulk, and SAM deformation was found to have a longer retardation time than restructuring of interfacial ions and solvent during tip-sample contact. C1 Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA. RP Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA. EM pashby@cmliris.harvard.edu NR 34 TC 21 Z9 21 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 11 PY 2005 VL 127 IS 18 BP 6814 EP 6818 DI 10.1021/ja0453127 PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA 925LY UT WOS:000229055800056 PM 15869304 ER PT J AU Arenz, M Mayrhofer, KJJ Stamenkovic, V Blizanac, BB Tomoyuki, T Ross, PN Markovic, NM AF Arenz, M Mayrhofer, KJJ Stamenkovic, V Blizanac, BB Tomoyuki, T Ross, PN Markovic, NM TI The effect of the particle size on the kinetics of CO electrooxidation on high surface area Pt catalysts SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ELECTROCHEMICAL INFRARED-SPECTROSCOPY; SUPPORTED PLATINUM NANOPARTICLES; CARBON-MONOXIDE; H-2/CO MIXTURES; CRYSTALLINE DEFECTS; MONOLAYER OXIDATION; ADLAYER OXIDATION; ADSORPTION; ELECTRODES; ELECTROCATALYSIS AB Using high-resolution transmission electron microscopy (TEM), infrared reflection-absorption spectroscopy (IRAS), and electrochemical (EC) measurements, platinum nanoparticles ranging in size from 1 to 30 nm are characterized and their catalytic activity for CO electrooxiclation is evaluated. TEM analysis reveals that Pt crystallites are not perfect cubooctahedrons, and that large particles have "rougher" surfaces than small particles, which have some fairly smooth (111) facets. The importance of "defect" sites for the catalytic properties of nanoparticles is probed in IRAS experiments by monitoring how the vibrational frequencies of atop CO (v(CO)) as well as the concomitant development of dissolved CO2 are affected by the number of defects on the Pt nanoparticles. It is found that defects play a significant role in CID "clustering" on nanoparticles, causing CO to decrease/increase in local coverage, which yields to anomalous redshift/ blueshift v(CO) frequency deviations from the normal Stark-tuning behavior. The observed deviations are accompanied by CO2 production, which increases by increasing the number of defects on the nanoparticles, that is. 1 <= 2 < 5 << 30 nm. We suggest that the catalytic activity for CO adlayer oxidation is predominantly influenced by the ability of the surface to dissociate water and to form OHad on defect sites rather than by CO energetics. These results are complemented by chronoamperometric and rotating disk electrode (RDE) data. In contrast to CO stripping experiments, we found that in the backsweep of CO bulk oxidation, the activity increases with decreasing particle size, that is, with increasing oxophilicity of the particles. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Tanaka Kikinzoku Kogyo KK Cooperat, Tokyo, Japan. RP Tech Univ Munich, Dept Chem, Chair Phys Chem 1, D-8000 Munich, Germany. EM matthias.arenz@ch.tum.de RI Mayrhofer, Karl/D-4166-2009; Arenz, Matthias/C-7385-2009; Arenz, Matthias/C-3195-2016 OI Arenz, Matthias/0000-0001-9765-4315; Arenz, Matthias/0000-0001-9765-4315 NR 52 TC 356 Z9 357 U1 21 U2 207 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 11 PY 2005 VL 127 IS 18 BP 6819 EP 6829 DI 10.1021/ja043602h PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA 925LY UT WOS:000229055800057 PM 15869305 ER PT J AU Cicero, G Grossman, JC Catellani, A Galli, G AF Cicero, G Grossman, JC Catellani, A Galli, G TI Water at a hydrophilic solid surface probed by ab initio molecular dynamics: Inhomogeneous thin layers of dense fluid SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID 1ST PRINCIPLES SIMULATIONS; FUNCTIONAL THEORY; LIQUID WATER; SILICON; H2O; SI(100)-(2X1); ADSORPTION; INTERFACE; ACCURACY AB We present a microscopic model of the interface between liquid water and a hydrophilic, solid surface, as obtained from ab initio molecular dynamics simulations. In particular, we focused on the (100) surface of cubic SiC, a leading semiconductor candidate for biocompatible devices. Our results show that in the liquid in contact with the clean substrate, molecular dissociation occurs in a manner unexpectedly similar to that observed in the gas phase. After full hydroxylation takes place, the formation of a thin (similar to 3 A) interfacial layer is observed, which has higher density than bulk water and forms stable hydrogen bonds with the substrate. The presence of this thin layer points at rather weak effects on the structural properties of water induced by a one-dimensional confinement between similar to 1.3 nm hydrophilic substrates. In addition, our results show that the liquid does not uniformly wet the surface, but molecules preferably bind along directions parallel to the Si climer rows. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. IMEM, CNR, I-43010 Parma, Italy. RP Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. EM cicero1@llnl.gov OI Catellani, Alessandra/0000-0001-5197-7186; Cicero, Giancarlo/0000-0002-2920-9882 NR 37 TC 43 Z9 44 U1 2 U2 14 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 11 PY 2005 VL 127 IS 18 BP 6830 EP 6835 DI 10.1021/ja042963u PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA 925LY UT WOS:000229055800058 PM 15869306 ER PT J AU Yershov, N Khabibullin, M Kudenko, Y Littenberg, L Mayatski, V Mineeva, O AF Yershov, N Khabibullin, M Kudenko, Y Littenberg, L Mayatski, V Mineeva, O TI Long sandwich modules for photon veto detectors SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE lead-plastic sandwich; WLS readout; photon detection; photon veto AB Long lead-scintillator sandwich modules developed for the BNL experiment KOPIO are described. The individual 4 in long module consists of 15 layers of 7 min thick extruded scintillator and 15 layers of I min lead absorber. Readout is implemented via WLS fibers glued into grooves in a scintillator with 7 min spacing and viewed from both ends by the phototubes. Time resolution of 300 ps for cosmic MIPs was obtained. Light output stability monitored for 2 years shows no degradation beyond the measurement errors. A 4 m long C-bent sandwich module was also manufactured and tested. (c) 2005 Elsevier B.V. All rights reserved. C1 Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia. Brookhaven Natl Lab, Upton, NY 11973 USA. AO Uniplast, Vladimir 600016, Russia. RP Yershov, N (reprint author), Russian Acad Sci, Inst Nucl Res, 60 October Revolut Pr 7A, Moscow 117312, Russia. EM yershov@wocup.inr.troitsk.ru RI Khabibullin, Marat/O-1076-2013; OI Littenberg, Laurence/0000-0001-8373-7179 NR 4 TC 7 Z9 7 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 11 PY 2005 VL 543 IS 2-3 BP 454 EP 462 DI 10.1016/j.nima.2004.11.051 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400005 ER PT J AU Adam, W Bergauer, T Friedl, M Fruehwirth, R Hrubec, J Krammer, M Pernicka, M Waltenberger, W Beaumont, W de Langhe, E de Wolf, E Tasevsky, M Bouhali, O Clerbaux, B de Lentdecker, G Dewulf, JP Neuckermans, L Vander-Velde, C Vanlaer, P Wickens, J D'Hondt, J Goorens, R Heyninck, J Lowette, S Tavernier, S Van Lancker, L Yu, C Assouak, S Bonnet, JL Bruno, G De-Callatay, B De-Favereau-de-Jeneret, J Delaere, C De-Visscher, S Favart, D Gregoire, G Keutgen, T Leibenguth, G Lemaitre, V Michotte, D Militaru, O Ninane, A Ovyn, S Piotrzkowski, K Roberfroid, V Rouby, X Van-Der-Aa, O Vander-Donckt, M Boulogne, I Daubie, E Defontaines, F Herquet, P Czellar, S Harkonen, J Karimaki, V Katajisto, H Linden, T Luukka, P Lampen, T Maenpaa, T Tuominen, E Tuominiemi, J Tuuva, T Ageron, M Chabanat, E Contardo, D Estre, N Haroutunian, R Lumb, N Mirabito, L Perries, S Trocme, B Blaes, R Charles, F Drouhin, F Ernenwein, JP Fontaine, JC Berst, JD Brom, JM Didierjean, F Goerlach, U Gross, L Juillot, P Lounis, A Maazouzi, C Olivetto, C Strub, R Vanhove, P Vintache, D Adolphi, R Brauer, R Braunschweig, W Esser, H Feld, L Heister, A Karpinski, W Klein, K Konig, S Kukulies, C Olzem, J Ostaptchouk, A Pandoulas, D Pierschel, G Raupach, F Schael, S von Dratzig, AS Schwering, G Siedling, R Thomas, M Wlochal, M Beissel, F Boffin, KD Duda, M Flossdorf, A Flugge, G Franke, T Hangarter, K Hegner, B Hermanns, T Kasselmann, S Kress, T Linn, A Mnich, J Nowack, A Poettgens, M Pooth, O Reinhold, B Bleyl, M Holm, U Klanner, R Pein, U Schleper, P Schirm, N Steinbruck, G Stoye, M Tesch, S van Staa, R Wick, K Atz, B Barvich, T Blum, P de Boer, W Boegelspacher, F Dirkes, G Fahrer, M Fernandez, J Frey, M Furgeri, A Grigoriev, E Hartmann, F Heier, S Muller, T Ortega-Gomez, T Simonis, HJ Steck, P Theel, A Weiler, T Zhukov, V Creanza, D De Filippis, N de Palma, M De Robertis, G Fiore, L Giordano, D Maggi, G Mennea, M My, S Radicci, V Selvaggi, G Silvestris, L Tempesta, P Zito, G Albergo, S Bellini, V Chiorboli, M Costa, S Potenza, R Tricomi, A Tuve, C Bocci, A Ciulli, V Civinini, C D'Alessandro, R Focardi, E Landi, G Macchiolo, A Magini, N Mersi, S Marchettini, C Meschini, M Paoletti, S Parrini, G Ranieri, R Sani, M Bacchetta, N Bisello, D Candelori, A Dorigo, T Giubilato, P Kaminsky, A Loreti, M Nigro, M Paccagnella, A Rando, R Angarano, MM Babucci, E Benedetti, D Biasini, M Bilei, GM Brunetti, MT Checcucci, B Dinu, N Fano, L Giorgi, M Lariccia, P Mantovani, G Postolache, V Puscalau, M Ricci, D Santinelli, R Santocchia, A Servoli, L Zucchetti, C Azzurri, P Bagliesi, G Basti, A Bernardini, J Boccali, T Borrello, L Bosi, F Castaldi, R D'Alfonso, M Dell'Orso, R Dutta, S Foa, L Gennai, S Giammanco, A Giassi, A Lomtadze, T Mangano, B Messineo, A Moggi, A Palla, F Palmonari, F Raffaelli, F Rizzi, A Rizzi, D Segneri, G Sentenac, D Sguazzoni, G Spagnolo, P Tonelli, G Verdini, PG Biino, C Costa, M Demaria, N Favro, G Trapani, P Peroni, C Romero, A Migliore, E Abbaneo, D Ahmed, F Bartalini, P Bernardino-Rodriguez, N Breuker, H Buchmuller, O Carrone, E Cattai, A Chierici, R Cucciarelli, S Dierlamm, A Eppard, M Frey, A Gill, K Grabit, R Honma, A Huhtinen, M Magazzu, G Mannelli, M Marchioro, A Onnela, A Perea-Solano, B Petagna, P Postema, H Risoldi, M Rolandi, G Siegrist, P Troska, I Tsirou, A Vasey, F Weber, M Wittmer, B Bertl, W Gabathuler, K Horisberger, R Kastli, HC Kotlinski, D MacPherson, A Rohe, T Freudenreich, K Lustermann, W Pauss, F Eichler, R Erdmann, W Grab, C Schoning, A Amsler, C Chiochia, V Dorokhov, A Hormann, C Pruys, H Prokofiev, K Regenfus, C Robmann, P Speer, T Bell, KW Coughlan, J French, M Halsall, R Jones, L Pearson, M Rogers, G Tomalin, I Bainbridge, R Barrillon, P Colling, D Dris, S Foudas, C Fulcher, J Hall, G Iles, G Jones, J Leaver, J Macevoy, BC Noy, M Raymond, DM Takahashi, M Zorba, O Barnett, B Chien, CY Kim, DW Liang, G Swartz, M Atac, M Demarteau, M Joshi, U Kwan, S Spiegel, L Tkaczyk, S Gerber, CE Shabalina, E Ten, T Lander, R Pellett, D Gobbi, B Kubantsev, M Malik, S Tilden, R Baringer, P Bean, A Christofek, L Coppage, D Bolton, TA Demina, R Kahl, WE Khanov, A Korjenevski, S Pukhaeva, N Reay, NW Rizatdinova, F Sidwell, RA Stanton, NR Cremaldi, L Sanders, D Bartz, E Doroshenko, J Koeth, T Perera, L Schnetzer, S Stone, R Worm, S Gartung, P Hanson, GG Jeng, GY Paztor, G Eusebi, R Halkiadakis, E Hocker, A Tipton, P Affolder, A Campagnari, C Hale, D Incandela, J Kyre, S Lamb, J Taylor, R White, D Bolla, G Bortoletto, D Garfinkel, A Rott, C Roy, A AF Adam, W Bergauer, T Friedl, M Fruehwirth, R Hrubec, J Krammer, M Pernicka, M Waltenberger, W Beaumont, W de Langhe, E de Wolf, E Tasevsky, M Bouhali, O Clerbaux, B de Lentdecker, G Dewulf, JP Neuckermans, L Vander-Velde, C Vanlaer, P Wickens, J D'Hondt, J Goorens, R Heyninck, J Lowette, S Tavernier, S Van Lancker, L Yu, C Assouak, S Bonnet, JL Bruno, G De-Callatay, B De-Favereau-de-Jeneret, J Delaere, C De-Visscher, S Favart, D Gregoire, G Keutgen, T Leibenguth, G Lemaitre, V Michotte, D Militaru, O Ninane, A Ovyn, S Piotrzkowski, K Roberfroid, V Rouby, X Van-Der-Aa, O Vander-Donckt, M Boulogne, I Daubie, E Defontaines, F Herquet, P Czellar, S Harkonen, J Karimaki, V Katajisto, H Linden, T Luukka, P Lampen, T Maenpaa, T Tuominen, E Tuominiemi, J Tuuva, T Ageron, M Chabanat, E Contardo, D Estre, N Haroutunian, R Lumb, N Mirabito, L Perries, S Trocme, B Blaes, R Charles, F Drouhin, F Ernenwein, JP Fontaine, JC Berst, JD Brom, JM Didierjean, F Goerlach, U Gross, L Juillot, P Lounis, A Maazouzi, C Olivetto, C Strub, R Vanhove, P Vintache, D Adolphi, R Brauer, R Braunschweig, W Esser, H Feld, L Heister, A Karpinski, W Klein, K Konig, S Kukulies, C Olzem, J Ostaptchouk, A Pandoulas, D Pierschel, G Raupach, F Schael, S von Dratzig, AS Schwering, G Siedling, R Thomas, M Wlochal, M Beissel, F Boffin, KD Duda, M Flossdorf, A Flugge, G Franke, T Hangarter, K Hegner, B Hermanns, T Kasselmann, S Kress, T Linn, A Mnich, J Nowack, A Poettgens, M Pooth, O Reinhold, B Bleyl, M Holm, U Klanner, R Pein, U Schleper, P Schirm, N Steinbruck, G Stoye, M Tesch, S van Staa, R Wick, K Atz, B Barvich, T Blum, P de Boer, W Boegelspacher, F Dirkes, G Fahrer, M Fernandez, J Frey, M Furgeri, A Grigoriev, E Hartmann, F Heier, S Muller, T Ortega-Gomez, T Simonis, HJ Steck, P Theel, A Weiler, T Zhukov, V Creanza, D De Filippis, N de Palma, M De Robertis, G Fiore, L Giordano, D Maggi, G Mennea, M My, S Radicci, V Selvaggi, G Silvestris, L Tempesta, P Zito, G Albergo, S Bellini, V Chiorboli, M Costa, S Potenza, R Tricomi, A Tuve, C Bocci, A Ciulli, V Civinini, C D'Alessandro, R Focardi, E Landi, G Macchiolo, A Magini, N Mersi, S Marchettini, C Meschini, M Paoletti, S Parrini, G Ranieri, R Sani, M Bacchetta, N Bisello, D Candelori, A Dorigo, T Giubilato, P Kaminsky, A Loreti, M Nigro, M Paccagnella, A Rando, R Angarano, MM Babucci, E Benedetti, D Biasini, M Bilei, GM Brunetti, MT Checcucci, B Dinu, N Fano, L Giorgi, M Lariccia, P Mantovani, G Postolache, V Puscalau, M Ricci, D Santinelli, R Santocchia, A Servoli, L Zucchetti, C Azzurri, P Bagliesi, G Basti, A Bernardini, J Boccali, T Borrello, L Bosi, F Castaldi, R D'Alfonso, M Dell'Orso, R Dutta, S Foa, L Gennai, S Giammanco, A Giassi, A Lomtadze, T Mangano, B Messineo, A Moggi, A Palla, F Palmonari, F Raffaelli, F Rizzi, A Rizzi, D Segneri, G Sentenac, D Sguazzoni, G Spagnolo, P Tonelli, G Verdini, PG Biino, C Costa, M Demaria, N Favro, G Trapani, P Peroni, C Romero, A Migliore, E Abbaneo, D Ahmed, F Bartalini, P Bernardino-Rodriguez, N Breuker, H Buchmuller, O Carrone, E Cattai, A Chierici, R Cucciarelli, S Dierlamm, A Eppard, M Frey, A Gill, K Grabit, R Honma, A Huhtinen, M Magazzu, G Mannelli, M Marchioro, A Onnela, A Perea-Solano, B Petagna, P Postema, H Risoldi, M Rolandi, G Siegrist, P Troska, I Tsirou, A Vasey, F Weber, M Wittmer, B Bertl, W Gabathuler, K Horisberger, R Kastli, HC Kotlinski, D MacPherson, A Rohe, T Freudenreich, K Lustermann, W Pauss, F Eichler, R Erdmann, W Grab, C Schoning, A Amsler, C Chiochia, V Dorokhov, A Hormann, C Pruys, H Prokofiev, K Regenfus, C Robmann, P Speer, T Bell, KW Coughlan, J French, M Halsall, R Jones, L Pearson, M Rogers, G Tomalin, I Bainbridge, R Barrillon, P Colling, D Dris, S Foudas, C Fulcher, J Hall, G Iles, G Jones, J Leaver, J Macevoy, BC Noy, M Raymond, DM Takahashi, M Zorba, O Barnett, B Chien, CY Kim, DW Liang, G Swartz, M Atac, M Demarteau, M Joshi, U Kwan, S Spiegel, L Tkaczyk, S Gerber, CE Shabalina, E Ten, T Lander, R Pellett, D Gobbi, B Kubantsev, M Malik, S Tilden, R Baringer, P Bean, A Christofek, L Coppage, D Bolton, TA Demina, R Kahl, WE Khanov, A Korjenevski, S Pukhaeva, N Reay, NW Rizatdinova, F Sidwell, RA Stanton, NR Cremaldi, L Sanders, D Bartz, E Doroshenko, J Koeth, T Perera, L Schnetzer, S Stone, R Worm, S Gartung, P Hanson, GG Jeng, GY Paztor, G Eusebi, R Halkiadakis, E Hocker, A Tipton, P Affolder, A Campagnari, C Hale, D Incandela, J Kyre, S Lamb, J Taylor, R White, D Bolla, G Bortoletto, D Garfinkel, A Rott, C Roy, A TI The effect of highly ionising particles on the CMS silicon strip tracker SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE CMS; silicon strip tracker; APV25; highly ionising particles AB Inelastic nuclear collisions of hadrons incident on silicon sensors can generate secondary highly ionising particles (HIPs) and deposit as much energy within the sensor bulk as several hundred minimum ionising particles. The large signals generated by these 'HIP events' can momentarily saturate the APV25 front-end readout chip for the silicon strip tracker (SST) sub-detector of the compact muon solenoid (CMS) experiment, resulting in deadtime in the detector readout system. This paper presents studies of this phenomenon through simulation, laboratory measurements and dedicated beam tests. A proposed change to a front-end component to reduce the APV25 sensitivity to HIP events is also examined. The results are used to infer the expected effect on the performance of the CMS SST at the future large hadron collider. The induced inefficiencies are at the percent level and will have a negligible effect on the physics performance of the SST. (c) 2005 Elsevier B.V. All rights reserved. C1 Oesterreich Akad Wissensch, HEPHY, Inst Hochenergiephys, Vienna, Austria. Univ Antwerp, B-2020 Antwerp, Belgium. Brussels ULB, Brussels, Belgium. Brussels VUB, Brussels, Belgium. Univ Helsinki, HIP, FIN-00014 Helsinki, Finland. Lappeenranta Univ Technol, Lappeenranta, Finland. Univ Haute Alsace, Mulhouse, France. Inst Rech Subatom, Strasbourg, France. Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany. Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany. Univ Hamburg, Hamburg, Germany. Karlsruhe IEKP, Karlsruhe, Germany. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Dipartimento Interateneo Fis, Bari, Italy. Ist Nazl Fis Nucl, I-95129 Catania, Italy. Univ Catania, I-95124 Catania, Italy. Ist Nazl Fis Nucl, I-50125 Florence, Italy. Univ Florence, I-50121 Florence, Italy. Ist Nazl Fis Nucl, Padua, Italy. Univ Padua, I-35100 Padua, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Perugia, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, Pisa, Italy. Univ Pisa, I-56100 Pisa, Italy. Scuola Normale Super Pisa, Pisa, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Turin, I-10124 Turin, Italy. CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland. Paul Scherrer Inst, Villigen, Switzerland. ETH, IPP LHP, Zurich, Switzerland. Univ Zurich, CH-8006 Zurich, Switzerland. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Johns Hopkins Univ, Baltimore, MD 21218 USA. Fermilab Natl Accelerator Lab, Batavia, IL USA. Univ Illinois, Chicago, IL 60680 USA. Univ Calif Davis, Davis, CA 95616 USA. Northwestern Univ, Evanston, IL 60208 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Univ Mississippi, University, MS 38677 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Res Inst Particle & Nucl Phys, Budapest, Hungary. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Purdue Univ, W Lafayette, IN 47907 USA. RP CERN, European Org Nucl Res, Mailbox E22210,40-4-B32, CH-1211 Geneva, Switzerland. EM Simone.Paoletti@cern.ch; robert.bainbridge@cern.ch RI Tuominen, Eija/A-5288-2017; BELLINI, Vincenzo/B-1239-2012; Krammer, Manfred/A-6508-2010; Servoli, Leonello/E-6766-2012; Fruhwirth, Rudolf/H-2529-2012; Focardi, Ettore/E-7376-2012; Rolandi, Luigi (Gigi)/E-8563-2013; Grigoriev, Eugene/K-6650-2013; Rando, Riccardo/M-7179-2013; D'Alessandro, Raffaello/F-5897-2015; My, Salvatore/I-5160-2015; Sguazzoni, Giacomo/J-4620-2015; TUVE', Cristina/P-3933-2015 OI Malik, Sudhir/0000-0002-6356-2655; Ciulli, Vitaliano/0000-0003-1947-3396; Bean, Alice/0000-0001-5967-8674; Giubilato, Piero/0000-0003-4358-5355; Prokofiev, Kirill/0000-0002-2177-6401; Luukka, Panja/0000-0003-2340-4641; Tuominen, Eija/0000-0002-7073-7767; Rott, Carsten/0000-0002-6958-6033; Rando, Riccardo/0000-0001-6992-818X; Costa, Salvatore/0000-0001-9919-0569; Tonelli, Guido Emilio/0000-0003-2606-9156; Rizzi, Andrea/0000-0002-4543-2718; Demaria, Natale/0000-0003-0743-9465; Boccali, Tommaso/0000-0002-9930-9299; Tricomi, Alessia Rita/0000-0002-5071-5501; BELLINI, Vincenzo/0000-0001-6906-7463; Krammer, Manfred/0000-0003-2257-7751; Servoli, Leonello/0000-0003-1725-9185; Focardi, Ettore/0000-0002-3763-5267; Rolandi, Luigi (Gigi)/0000-0002-0635-274X; Grigoriev, Eugene/0000-0001-7235-9715; D'Alessandro, Raffaello/0000-0001-7997-0306; My, Salvatore/0000-0002-9938-2680; Sguazzoni, Giacomo/0000-0002-0791-3350; TUVE', Cristina/0000-0003-0739-3153 NR 14 TC 3 Z9 3 U1 1 U2 6 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 11 PY 2005 VL 543 IS 2-3 BP 463 EP 482 DI 10.1016/j.nima.2004.11.049 PG 20 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400006 ER PT J AU Stavsetra, L Gregorich, KE Alstad, J Breivik, H Eberhardt, K Folden, CM Ginter, TN Johansson, M Kirbach, UW Lee, DM Mendel, M Omtvedt, LA Patin, JB Skarnemark, G Sudowe, R Wilk, PA Zielinski, PM Nitsche, H Hoffman, DC Omtvedt, JP AF Stavsetra, L Gregorich, KE Alstad, J Breivik, H Eberhardt, K Folden, CM Ginter, TN Johansson, M Kirbach, UW Lee, DM Mendel, M Omtvedt, LA Patin, JB Skarnemark, G Sudowe, R Wilk, PA Zielinski, PM Nitsche, H Hoffman, DC Omtvedt, JP TI Liquid-scintillation detection of preseparated (257)Rf with the SISAK-system SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE continuous alpha-liquid scintillation detection; SISAK; preseparated (257)Rf ID CHEMICAL ONLINE SEPARATION AB The fast liquid-liquid extraction system SISAK with continuous liquid scintillation detection was coupled to the Berkeley Gas-filled Separator to enable studies of the chemical properties of a-decaying transactinide elements. The preseparated transactinide (257)Rf (4.7 s), was transported via a He/KCl-jet directly into the scintillation solution. This permitted the first unambiguous detection of transactinide atoms by the means of the a-liquid scintillation detectors of the SISAK-system. During the experiment, 89 (257)Rf atoms were observed. The type of events observed correspond well with the expectations based on half-lives, decay branches and transport- and hold-up times. The successful result of this experiment demonstrates that the system is well fitted for count-rates of 1-2 atoms/h and half-lives of a few seconds. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Oslo, Dept Chem, N-0315 Oslo, Norway. Univ Mainz, Inst Nucl Chem, D-55128 Mainz, Germany. Chalmers Univ Technol, Dept Mat & Surface Chem, S-41296 Gothenburg, Sweden. Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Stavsetra, L (reprint author), Univ Oslo, Dept Chem, POB 1033, N-0315 Oslo, Norway. EM liv.stavsetra@kjemi.uio.no; j.p.omtvedt@kjemi.uio.no RI Wilk, Philip/B-5954-2008; Omtvedt, Jon Petter/C-8194-2011; Folden, Charles/F-1033-2015 OI Omtvedt, Jon Petter/0000-0002-1822-7348; Folden, Charles/0000-0002-2814-3762 NR 22 TC 24 Z9 25 U1 1 U2 8 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 11 PY 2005 VL 543 IS 2-3 BP 509 EP 516 DI 10.1016/j.nima.2004.12.010 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400010 ER PT J AU Hollas, CL Goulding, C Myers, W AF Hollas, CL Goulding, C Myers, W TI Determination of neutron multiplication of subcritical HEU systems using delayed neutrons SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE fission of highly enriched uranium; neutron multiplication; nondestructive analysis of HEU ID FISSION AB This report presents a new method for the nondestructive analysis of highly enriched uranium (HEU). The method uses a source of 14-MeV neutrons to induce fission in the HEU sample. The 14-MeV neutron source is pulsed at a rate of 50 Hz. Between pulses, neutrons are detected with a medium-efficiency 3 He-based neutron detector. These neutrons are delayed neutrons from fission products that result from HEU fission events induced during the pulse and from fission events induced by the delayed neutrons from the fission products. The time history of neutron detection is recorded and subsequently analyzed according to the Feymnan reduced variance method to yield rates of detection of one (N1/s), two (N2/s), and three (N3/s) neutrons from fission events. Ratios of (N2/s)/(N1/s) and (N3/s)/(N1/s) are compared with model calculations to extract the neutron multiplication. The rate N1/s is used to deduce the HEU system mass. Measurements were performed on a set of spherical HEU samples enriched to 93% metal. The samples were assembled from a set of nesting hollow hemispheres. The mass of the HEU samples ranged from 592 to 13 722 g. Experimentally determined total neutron multiplications for the HEU samples were compared with calculations performed with the ONEDANT code. Overall agreement was better than 5%. Experimentally determined mass values agreed with the stated mass values to better than 5%. (c) 2005 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Adv Nucl Technol Grp, Los Alamos, NM 87545 USA. RP Hollas, CL (reprint author), Los Alamos Natl Lab, Adv Nucl Technol Grp, N-2,POB 1663,Mail Stop J562, Los Alamos, NM 87545 USA. EM chollas@lanl.gov NR 15 TC 4 Z9 4 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 11 PY 2005 VL 543 IS 2-3 BP 559 EP 569 DI 10.1016/j.nima.2004.12.016 PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400015 ER PT J AU Roe, BP Yang, HJ Zhu, J Liu, Y Stancu, I McGregor, G AF Roe, BP Yang, HJ Zhu, J Liu, Y Stancu, I McGregor, G TI Boosted decision trees as an alternative to artificial neural networks for particle identification SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE boosted decision trees; artificial neural network; particle identification; neutrino oscillations; MiniBooNE AB The efficacy of particle identification is compared using artificial neutral networks and boosted decision trees. The comparison is performed in the context of the MiniBooNE, an experiment at Fermilab searching for neutrino oscillations. Based on studies of Monte Carlo samples of simulated data, particle identification with boosting algorithms has better performance than that with artificial neural networks for the MiniBooNE experiment. Although the tests in this paper were for one experiment, it is expected that boosting algorithms will find wide application in physics. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA. Univ Michigan, Dept Stat, Ann Arbor, MI 48109 USA. Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Yang, HJ (reprint author), Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA. EM yhj@umich.edu RI Yang, Haijun/O-1055-2015 NR 11 TC 140 Z9 141 U1 3 U2 4 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 11 PY 2005 VL 543 IS 2-3 BP 577 EP 584 DI 10.1016/j.nima.2004.12.018 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400017 ER PT J AU Liu, Z Kurcewicz, J Woods, PJ Mazzocchi, C Attallah, F Badura, E Davids, CN Davinson, T Doring, J Geissel, H Gorska, M Grzywacz, R Hellstrom, M Janas, Z Karny, M Korgul, A Mukha, I Pfutzner, M Plettner, C Robinson, A Roeckl, E Rykaczewski, K Schmidt, K Seweryniak, D Weick, H AF Liu, Z Kurcewicz, J Woods, PJ Mazzocchi, C Attallah, F Badura, E Davids, CN Davinson, T Doring, J Geissel, H Gorska, M Grzywacz, R Hellstrom, M Janas, Z Karny, M Korgul, A Mukha, I Pfutzner, M Plettner, C Robinson, A Roeckl, E Rykaczewski, K Schmidt, K Seweryniak, D Weick, H TI Decay spectroscopy of suburanium isotopes following projectile fragmentation of U-238 at 1 GeV/u SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE projectile-fragmentation; suburanium isotopes; alpha radioactivity; p radioactivity ID RELATIVISTIC HEAVY-IONS; ALPHA-DECAY; IDENTIFICATION; NUCLEI; SN-100; SYSTEM; MATTER AB Charged-particle decay spectroscopy of heavy suburanium isotopes produced by projectile fragmentation of I GeV/u U-238 was tested using a simple implantation-decay set-up equipped with fast-reset preamplifiers. The products were separated and identified with the GSI fragment separator (FRS) and implanted into a stack of Si detectors. Measurements were performed of implantation decay correlations of nuclei with half-lives in the range of 0.1-100ms. Yields of very neutron-deficient protactinium, thorium and actinium isotopes were measured and yield extrapolations imply that with the availability of a beam intensity of 10(9) ions/s, projectile fragmentation of relativistic U-238 can be an effective method to access new nuclear species including possible proton emitters in the suburanium region. (c) 2005 Published by Elsevier B.V. C1 Univ Edinburgh, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland. Warsaw Univ, Inst Expt Phys, PL-00681 Warsaw, Poland. GSI Darmstadt, D-64291 Darmstadt, Germany. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Liu, Z (reprint author), Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England. EM z.liu@surrey.ac.uk NR 30 TC 14 Z9 14 U1 0 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 11 PY 2005 VL 543 IS 2-3 BP 591 EP 601 DI 10.1016/j.nima.2004.12.023 PG 11 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 929OV UT WOS:000229356400019 ER PT J AU Levan, A Nugent, P Fruchter, A Burud, I Branch, D Rhoads, J Castro-Tirado, A Gorosabel, J Ceron, JMC Thorsett, SE Kouveliotou, C Golenetskii, S Fynbo, J Garnavich, P Holland, S Hjorth, J Moller, P Pian, E Tanvir, N Ulanov, M Wijers, R Woosley, S AF Levan, A Nugent, P Fruchter, A Burud, I Branch, D Rhoads, J Castro-Tirado, A Gorosabel, J Ceron, JMC Thorsett, SE Kouveliotou, C Golenetskii, S Fynbo, J Garnavich, P Holland, S Hjorth, J Moller, P Pian, E Tanvir, N Ulanov, M Wijers, R Woosley, S TI GRB 020410: A gamma-ray burst afterglow discovered by its supernova light SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts; supernovae : general ID NEAR-INFRARED OBSERVATIONS; 28 FEBRUARY 1997; HOST GALAXY; OPTICAL AFTERGLOW; DUST EXTINCTION; DARK BURSTS; NOVA 1979C; GRB 980329; ERROR BOX; SN 1998BW AB We present the discovery and monitoring of the optical transient (OT) associated with GRB 020410. The fading OT was found by Hubble Space Telescope (HST) observations taken 28 and 65 days after burst at a position consistent with the X-ray afterglow, making this the first time that the optical afterglow of a gamma-ray burst ( GRB) has been discovered by an orbiting observatory. Subsequent reexamination of early ground-based observations revealed that a faint OT was present 6 hr after burst, confirming the source association with GRB 020410. A deep nondetection after one week requires that the OT rebrightened between day 7 and day 28, and further late-time HST data taken approximately 100 days after burst imply that it is very red ( F-ν &PROP; ν(-2.7)). We compare both the flux and color of the excess with supernova models and show that the data are best explained by the presence of a Type Ib/c supernova at a redshift z &AP; 0.5, which occurred roughly coincident with the day of the GRB. C1 Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Oklahoma, Dept Phys & Astron, Norman, OK 73019 USA. CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. Natl Space Sci & Technol Ctr, NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35805 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus, Denmark. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. NASA, Goddard Space Flight Ctr, Swift Sci Ctr, Greenbelt, MD 20771 USA. Univ Space Res Assoc, Columbia, MD 21044 USA. Univ Copenhagen, Astron Observ, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. European So Observ, D-85748 Garching, Germany. Osserv Astron Trieste, I-34131 Trieste, Italy. Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England. Univ Amsterdam, Astron Inst, NL-1098 SJ Amsterdam, Netherlands. RP Levan, A (reprint author), Univ Leicester, Dept Phys & Astron, Univ Rd, Leicester LE1 7RH, Leics, England. EM anl@star.le.ac.uk RI Hjorth, Jens/M-5787-2014; Ulanov, Mikhail/B-3467-2015; Golenetskii, Sergey/B-3818-2015; OI Hjorth, Jens/0000-0002-4571-2306; Ulanov, Mikhail/0000-0002-0076-5228; Thorsett, Stephen/0000-0002-2025-9613; Wijers, Ralph/0000-0002-3101-1808; Castro-Tirado, A. J./0000-0003-2999-3563; Pian, Elena/0000-0001-8646-4858 NR 77 TC 36 Z9 36 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 10 PY 2005 VL 624 IS 2 BP 880 EP 888 DI 10.1086/428657 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 923NG UT WOS:000228916000033 ER PT J AU Li, H Li, ST Koller, J Wendroff, BB Liska, R Orban, CM Liang, EPT Lin, DNC AF Li, H Li, ST Koller, J Wendroff, BB Liska, R Orban, CM Liang, EPT Lin, DNC TI Potential vorticity evolution of a protoplanetary disk with an embedded protoplanet SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; hydrodynamics; planetary systems : protoplanetary disks ID ORBITAL MIGRATION; COROTATION TORQUE; TIDAL INTERACTION; SOLAR NEBULA; ACCRETION; SIMULATIONS; FLOW; PLANETS AB We present two-dimensional inviscid hydrodynamic simulations of a protoplanetary disk with an embedded planet, emphasizing the evolution of potential vorticity ( the ratio of vorticity to density) and its dependence on numerical resolutions. By analyzing the structure of spiral shocks made by the planet, we show that progressive changes of the potential vorticity caused by spiral shocks ultimately lead to the excitation of a secondary instability. We also demonstrate that very high numerical resolution is required to both follow the potential vorticity changes and identify the location where the secondary instability is first excited. Low-resolution results are shown to give the wrong location. We establish the robustness of a secondary instability and its impact on the planet's torque. After the saturation of the instability, the disk shows large-scale nonaxisymmetry, causing the torque on the planet to oscillate with large amplitude. The impact of the oscillating torque on the protoplanet's migration remains to be investigated. C1 Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, ISR Div, Los Alamos, NM 87545 USA. Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA. RP Li, H (reprint author), Los Alamos Natl Lab, Div Appl Phys, MS B227, Los Alamos, NM 87545 USA. EM hli@lanl.gov; sli@lanl.gov; jkoller@lanl.gov; bbw@lanl.gov; liska@siduri.fjfi.cvut.cz; corban@uiuc.edu; liang@spacsun.rice.edu; lin@ucolick.org RI Koller, Josef/C-5591-2009; Liska, Richard/C-3142-2009 OI Koller, Josef/0000-0002-6770-4980; Liska, Richard/0000-0002-6149-0440 NR 20 TC 45 Z9 45 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 10 PY 2005 VL 624 IS 2 BP 1003 EP 1009 DI 10.1086/429367 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 923NG UT WOS:000228916000045 ER PT J AU Lapenta, G Knoll, DA AF Lapenta, G Knoll, DA TI Effect of a converging flow at the streamer cusp on the genesis of the slow solar wind SO ASTROPHYSICAL JOURNAL LA English DT Article DE solar wind; Sun : corona; Sun : magnetic fields ID KELVIN-HELMHOLTZ INSTABILITY; MAGNETIC RECONNECTION; CORONAL STREAMERS; CURRENT SHEETS; EVOLUTION; BELT; MAGNETOHYDRODYNAMICS; ORIGIN; FIELD AB The observation by the Large Angle and Spectrometric Coronagraph (LASCO) instrument on the Solar and Heliospheric Observatory of blobs of plasma generated near the cusp region of the streamer belt has sparked the hope of gaining new insight into the genesis of the slow solar wind. The observations suggest that open and closed field lines reconnect near the cusp of the helmet streamer to form blobs of higher density plasmas that are ejected into the slow solar wind. Models of this process have been suggested, and simulation studies have been conducted. We take the recent simulation work of Einaudi et al. as our starting point to investigate the formation of the slow solar wind and of the blobs observed by LASCO. We report two main conclusions. First, our results confirm the overall scenario suggested in the above paper ( Einaudi et al.), which is that reconnection indeed causes the formation of blobs and the acceleration of the slow solar wind. Second, by employing more realistic two-dimensional configurations including the cusp and bent field lines with fast solar wind flow, we find that reconnection giving rise to plasma blobs is driven by converging flows with reconnection rates largely insensitive to changes in resistivity. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Lapenta, G (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM lapenta@lanl.gov; nol@lanl.gov OI Lapenta, Giovanni/0000-0002-3123-4024 NR 25 TC 19 Z9 20 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 10 PY 2005 VL 624 IS 2 BP 1049 EP 1056 DI 10.1086/429262 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 923NG UT WOS:000228916000049 ER PT J AU Huber, R Kubler, C Tubel, S Leitenstorfer, A AF Huber, R Kubler, C Tubel, S Leitenstorfer, A TI Single-cycle multi-terahertz spectroscopy: observing the build-up of phonon-plasmon coupling in photoexcited InP SO JOURNAL OF MODERN OPTICS LA English DT Article ID PULSES; GENERATION; GAAS AB Exploiting ultrabroadband terahertz technology, we study the femtosecond transition of a longitudinal optical phonon resonance to a coupled phonon plasmon system. After 10 fs photoexcitation of intrinsic InP, the build-up of coherent beats of the emerging hybrid modes is directly monitored in the time domain with subcycle resolution. Mutual repulsion and redistribution of the oscillator strength of the interacting phonons and plasmons are seen to emerge on a delayed femtosecond time scale. Both branches of the mixed modes are monitored for various excitation densities N. We observe a pronounced anti-crossing of the coupled modes as a function of N. The characteristic formation time for phonon - plasmon coupling exhibits a density dependence. The time is approximately set by one oscillation cycle of the upper branch of the mixed modes. C1 Tech Univ Munich, Dept Phys E11, D-85748 Garching, Germany. Univ Konstanz, Fachbereich Phys, D-78457 Constance, Germany. RP Huber, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,MS 2-344, Berkeley, CA 94720 USA. EM ruhub@ph.tum.de RI Leitenstorfer, Alfred/B-9561-2015 NR 17 TC 1 Z9 1 U1 0 U2 4 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0340 J9 J MOD OPTIC JI J. Mod. Opt. PD MAY 10 PY 2005 VL 52 IS 7 BP 965 EP 972 DI 10.1080/09500340500058066 PG 8 WC Optics SC Optics GA 920CM UT WOS:000228666500004 ER PT J AU Yim, H Kent, MS Tallant, DR Garcia, MJ Majewski, J AF Yim, H Kent, MS Tallant, DR Garcia, MJ Majewski, J TI Hygrothermal degradation of (3-glycidoxypropyl)trimethoxysilane films studied by neutron and X-ray reflectivity and attenuated total reflection infrared spectroscopy SO LANGMUIR LA English DT Article ID SILANE COUPLING AGENT; FIBER-REINFORCED COMPOSITES; WATER-ADSORPTION; E-GLASS; PHOTOELECTRON-SPECTROSCOPY; SILICON-WAFERS; EPOXY-RESIN; LAYERS; INTERFACE; SURFACE AB Thin films of organosilanes have great technological importance in the areas of adhesion promotion, durability, and corrosion resistance. However, it is well-known that water can degrade organosilane films, particularly at elevated temperatures. In this work, X-ray and neutron reflectivity (XR and NR) were combined with attenuated total reflection infrared (ATR-IR) spectroscopy to study the chemical and structural changes within thin films of (3-glycidoxypropyl)trimethoxysilane (GPS) after exposure for various periods of time to air saturated with either D2O or H2O at 80 &DEG; C. For NR and XR, ultrathin (&SIM; 100 &ANGS;) films were prepared by spin-coating. Both D2O and H2O provide neutron scattering contrast with GPS. Variations in the neutron scattering length density (SLD) profiles (a function of mass density and atomic composition) with conditioning time were measured after drying the samples out and also swelled with H2O or D2O vapor at room temperature. For samples that were dried out prior to measurement, little or no change was observed for H2O conditioning up to 3.5 days, but large changes were observed after 30 days of conditioning. The range of conditioning time for this structural change was narrowed to between 4 and 10 days with XR. The SLD profiles indicated that the top portion of the GPS film was transformed into a thick low-density layer after conditioning, but the bottom portion showed little structural change. A previous NR study of as-prepared GPS films involving swelling with deuterated nitrobenzene showed that the central portion of the film has much lower cross-link density than the region nearest the substrate. The present data show that the central portion also swells to a much greater extent with water and hydrolyzes more rapidly. The chemical degradation mechanism was identified by IR as hydrolysis of siloxane bonds. For ATR-IR, GPS films were prepared by dip-coating, which resulted in a greater and more variable thickness than for the spin-coated samples. The IR spectra revealed an increase in vicinal silanol generation over the first 3 days of conditioning followed by geminal silanol generation. Thus, the structural change detected by NR and XR roughly coincided with the onset of geminal silanol generation. Finally, little change in the reflectivity data was observed for films conditioned with D2O at 80 &DEG; C for 1 month. This indicates that hydrolysis of Si-O-Si is much slower with D2O than with H2O. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA. RP Kent, MS (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RI Lujan Center, LANL/G-4896-2012 NR 40 TC 20 Z9 21 U1 3 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 10 PY 2005 VL 21 IS 10 BP 4382 EP 4392 DI 10.1021/la0474870 PG 11 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 924MU UT WOS:000228983700024 PM 16032851 ER PT J AU Yoon, TH Trainor, TP Eng, PJ Bargar, JR Brown, GE AF Yoon, TH Trainor, TP Eng, PJ Bargar, JR Brown, GE TI Trace metal ion partitioning at polymer film-metal oxide interfaces: Long-period X-ray standing wave study SO LANGMUIR LA English DT Article ID ORGANIC-MATTER; MINERAL SURFACES; HUMIC SUBSTANCES; ISOELECTRIC POINTS; WATER INTERFACE; ALPHA-ALUMINA; HEMATITE 0001; SORPTION; ADSORPTION; PB(II) AB The distributions of Pb(II) and As(V)O-4(3-) ions in the interfacial region between thin poly(acrylic acid) (PAA) coatings and α-Al2O3(0001), α-Al2O3(1-102), and α-Fe2O3(0001) single-crystal substrates were studied using long-period X-ray standing wave fluorescent yield (XSW-FY) and X-ray reflectivity techniques. The PAA film serves as a simplified analogue of natural organic matter (NOM) coatings on mineral surfaces. Such coatings are often assumed to play an important role in the partitioning and speciation of trace heavy metals in soils and aquatic systems. On the α-Al2O3(1-102) surface, Pb(II) ions were found to preferentially bind to the PAA coating, even at sub-micromolar Pb(H) concentrations, and to partition increasingly onto the metal oxide surface as the Pb(II) concentration was increased ([Pb(II)] = 5 x 10(-8) to 2 x 10(-5) M, pH = 4.5; 0.01 M NaCl background electrolyte). This observation suggests that the binding sites in the PAA coating outcompete those on the α-Al2O3(1-102) surface for Pb(II) under these conditions. The As(V)O-4(3-) oxoanion partitions preferentially to the α-Al2O3(1-102) surface for the As(V)O-4(3-) concentrations examined (1 x 10(-7) to 5 x 10(-7) M, pH = 4.5; 0.01 M NaCl background electrolyte). Partitioning of Pb(H) (at 1 x 10(-7) M and pH 4.5) was also examined at PAA/α-Al2O3(0001), and PAA/α-Fe2O3(0001) interfaces using XSW-FY measurements. Our results show that the PAA coating was the dominant sink for Pb(II) in all three samples; however, the relative order of reactivity of these metal oxide surfaces with respect to Pb(II) sorption is α-Fe2O3(0001) > α-Al2O3(1-102) > α-Al2O3(0001). This order is consistent with that found in previous studies of the PAA-free surfaces. These XSW results strongly suggest that the characteristics of the organic film (i.e., binding affinity, type, and density of binding sites) as well as metal oxide substrate reactivity are key factors determining the distribution and speciation of Pb(II) and As(V)O-4(3-) at organic film/metal oxide interfaces. C1 Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. Univ Alaska Fairbanks, Dept Chem & Biochem, Fairbanks, AK 99775 USA. Univ Chicago, Chicago, IL 60637 USA. SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Yoon, TH (reprint author), Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. EM taeyoon@pangea.stanford.edu NR 47 TC 17 Z9 17 U1 0 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAY 10 PY 2005 VL 21 IS 10 BP 4503 EP 4511 DI 10.1021/la047271y PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 924MU UT WOS:000228983700039 PM 16032866 ER PT J AU Miller, WH AF Miller, WH TI Quantum dynamics of complex molecular systems SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID INITIAL-VALUE REPRESENTATION; TIME-CORRELATION-FUNCTIONS; VIBRATIONAL-ENERGY LEVELS; MECHANICAL RATE CONSTANTS; PATH-INTEGRAL TECHNIQUES; THERMAL RATE CONSTANTS; REAL-TIME; INSTANTON APPROXIMATION; INFLUENCE FUNCTIONALS; CONDENSED-PHASE AB This Perspective presents a broad overview of the present status of theoretical capabilities for describing quantum dynamics in molecular systems with many degrees of freedom, e.g., chemical reactions in solution, clusters, solids, or biomolecular environments. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, KS Pitzer Ctr Theoret Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Miller, WH (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM millerwh@berkeley.edu NR 59 TC 56 Z9 56 U1 2 U2 11 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 10 PY 2005 VL 102 IS 19 BP 6660 EP 6664 DI 10.1073/pnas.0408043102 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500006 PM 15870209 ER PT J AU Karplus, M Kuriyan, J AF Karplus, M Kuriyan, J TI Molecular dynamics and protein function SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID ABL TYROSINE KINASE; DIHYDROFOLATE-REDUCTASE; TRIOSEPHOSPHATE ISOMERASE; ATP SYNTHASE; C-ABL; ENZYME CATALYSIS; FORCE-FIELDS; CONFORMATIONAL CHANGE; ENERGY TRANSDUCTION; IMPLICIT SOLVENT AB A fundamental appreciation for how biological macromolecules work requires knowledge of structure and dynamics. Molecular dynamics simulations provide powerful tools for the exploration of the conformational energy landscape accessible to these molecules, and the rapid increase in computational power coupled with improvements in methodology makes this an exciting time for the application of simulation to structural biology. In this Perspective we survey two areas, protein folding and enzymatic catalysis, in which simulations have contributed to a general understanding of mechanism. We also describe results for the F-1 ATPase molecular motor and the Src family of signaling proteins as examples of applications of simulations to specific biological systems. C1 Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA. Univ Strasbourg 1, Lab Chim Biophys, Inst Sci & Ingn Supramol, F-67000 Strasbourg, France. Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Kuriyan, J (reprint author), Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA. EM marci@tammy.harvard.edu; kuriyan@berkeley.edu NR 84 TC 489 Z9 499 U1 10 U2 98 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 10 PY 2005 VL 102 IS 19 BP 6679 EP 6685 DI 10.1073/pnas.0408930102 PG 7 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500009 PM 15870208 ER PT J AU Jung, Y Sodt, A Gill, PMW Head-Gordon, M AF Jung, Y Sodt, A Gill, PMW Head-Gordon, M TI Auxiliary basis expansions for large-scale electronic structure calculations SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE linear scaling; resolution of the identity; density fitting ID DENSITY-FUNCTIONAL CALCULATIONS; APPROXIMATE COULOMB POTENTIALS; PLESSET PERTURBATION-THEORY; FAST MULTIPOLE METHOD; BASIS-SETS; INTEGRALS; MP2; ORBITALS; COMPUTATION; GAUSSIAN-2 AB One way to reduce the computational cost of electronic structure calculations is to use auxiliary basis expansions to approximate four-center integrals in terms of two- and three-center integrals, usually by using the variationally optimum Coulomb metric to determine the expansion coefficients. However, the long-range decay behavior of the auxiliary basis expansion coefficients has not been characterized. We find that this decay can be surprisingly slow. Numerical experiments on linear alkanes and a toy model both show that the decay can be as slow as 1/r in the distance between the auxiliary function and the fitted charge distribution. The Coulomb metric fitting equations also involve divergent matrix elements for extended systems treated with periodic boundary conditions. An attenuated Coulomb metric that is short-range can eliminate these oddities without substantially degrading calculated relative energies. The sparsity of the fit coefficients is assessed on simple hydrocarbon molecules and shows quite early onset of linear growth in the number of significant coefficients with system size using the attenuated Coulomb metric. Hence it is possible to design linear scaling auxiliary basis methods without additional approximations to treat large systems. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia. RP Head-Gordon, M (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM mhg@bastille.cchem.berkeley.edu RI Gill, Peter/A-1201-2010; Jung, Yousung/D-1676-2010 OI Gill, Peter/0000-0003-1042-6331; Jung, Yousung/0000-0003-2615-8394 NR 37 TC 108 Z9 108 U1 1 U2 20 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 10 PY 2005 VL 102 IS 19 BP 6692 EP 6697 DI 10.1073/pnas.0408475102 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500011 PM 15845767 ER PT J AU Asthagiri, D Pratt, LR Kress, JD AF Asthagiri, D Pratt, LR Kress, JD TI Ab initio molecular dynamics and quasichemical study of H+(aq) SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE eigen cation; zundel cation ID HYDRATION FREE-ENERGY; GENERALIZED GRADIENT APPROXIMATION; AUGMENTED-WAVE METHOD; PROTON TRANSPORT; EXCESS PROTON; WATER; IONS; SIMULATION; SOLVATION; DENSITY AB The excess proton in water, H+(aq), plays a fundamental role in aqueous solution chemistry. Its solution thermodynamic properties are essential to molecular descriptions of that chemistry and for validation of dynamical calculations. Within the quasichemical theory of solutions those thermodynamic properties are conditional on recognizing underlying solution structures. The quasichemical treatment identifies H3O+ and H2O5+ as natural inner-shell complexes, corresponding to the cases of n = 1, 2 water molecule ligands, respectively, of a distinguished H+ ion. A quantum-mechanical treatment of the inner-shell complex with both a dielectric continuum and a classical molecular dynamics treatment of the outer-shell contribution identifies the latter case (the Zundel complex) as the more numerous species. Ab initio molecular dynamics simulations, with two different electron density functionals, suggest a preponderance of Zundel-like structures, but a symmetrical ideal Zundel cation is not observed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, POB 1663, 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 42 TC 73 Z9 74 U1 2 U2 11 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 10 PY 2005 VL 102 IS 19 BP 6704 EP 6708 DI 10.1073/pnas.0408071102 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500013 PM 15831590 ER PT J AU Paschek, D Gnanakaran, S Garcia, AE AF Paschek, D Gnanakaran, S Garcia, AE TI Simulations of the pressure and temperature unfolding of an alpha-helical peptide SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE folding; thermodynamics; IR spectroscopy; replica exchange molecular dynamics ID TRANSFORM INFRARED-SPECTROSCOPY; MOLECULAR-DYNAMICS SIMULATIONS; FREE-ENERGY-LANDSCAPE; STAPHYLOCOCCAL NUCLEASE; HYDROPHOBIC INTERACTIONS; EXPLICIT SOLVENT; IR SPECTROSCOPY; BETA-HAIRPIN; FORCE-FIELD; PROTEIN AB We study by molecular simulations the reversible folding/unfolding equilibrium as a function of density and temperature of a solvated a-helical peptide. We use an extension of the replica exchange molecular dynamics method that allows for density and temperature Monte Carlo exchange moves. We studied 360 thermodynamic states, covering a density range from 0.96 to 1.14 g(.)cm(-3) and a temperature range from 300 to 547.6 K. We simulated 10 ns per replica for a total simulation time of 3.6 mu s. We characterize the structural, thermodynamic, and hydration changes as a function of temperature and pressure. We also calculate the compressibility and expansivity of unfolding. We find that pressure does not affect the helix-coil equilibrium significantly and that the volume change upon pressure unfolding is small and negative (-2.3 ml/mol). However, we find significant changes in the coordination of water molecules to the backbone carbonyls. This finding predicts that changes in the chemical shifts and IR spectra with pressure can be due to changes in coordination and not only changes in the helical content. A simulation of the IR spectrum shows that water coordination effects on frequency shifts are larger than changes due to elastic structural changes in the peptide. C1 Univ Dortmund, Dept Chem Phys, D-44221 Dortmund, Germany. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA. RP Garcia, AE (reprint author), Univ Dortmund, Dept Chem Phys, Otto Hahn Str 6, D-44221 Dortmund, Germany. EM angel@rpi.edu RI Paschek, Dietmar/D-2949-2009 NR 54 TC 92 Z9 95 U1 1 U2 11 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 10 PY 2005 VL 102 IS 19 BP 6765 EP 6770 DI 10.1073/pnas.0408527102 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500024 PM 15800045 ER PT J AU Law, RJ Henchman, RH McCammon, JA AF Law, RJ Henchman, RH McCammon, JA TI A gating mechanism proposed from a simulation of a human alpha 7 nicotinic acetylcholine receptor SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID LIGAND-BINDING DOMAIN; GATED ION-CHANNEL; MOLECULAR-DYNAMICS; AGONIST BINDING; GABA(A) RECEPTOR; SYNAPTIC TRANSMISSION; INHALED ANESTHETICS; PROTEIN-STRUCTURE; MODEL; PORE AB The nicotinic acetylcholine receptor is a well characterized ligand-gated ion channel, yet a proper description of the mechanisms involved in gating, opening, closing, ligand binding, and desensitization does not exist. Until recently, atomic-resolution structural information on the protein was limited, but with the production of the x-ray crystal structure of the Lymnea stagnalis acetylcholine binding protein and the EM image of the transmembrane domain of the torpedo electric ray nicotinic channel, we were provided with a window to examine the mechanism by which this channel operates. A 15-ns all-atom simulation of a homology model of the homomeric human α 7 form of the receptor was conducted in a solvated palmitoyl-2-oleoyl-sn-glycerol-phosphatidylcholine bilayer and examined in detail. The receptor was unliganded. The structure undergoes a twist-to-close motion that correlates movements of the C loop in the ligand binding domain, via the β 10-strand that connects the two, with the 10&DEG; rotation and inward movement of two nonadjacent subunits. The Cys loop appears to act as a stator around which the a-helical transmembrane domain can pivot and rotate relative to the rigid β-sheet binding domain. The M2-M3 loop may have a role in controlling the extent or kinetics of these relative movements. All of this motion, along with essential dynamics analysis, is suggestive of the direction of larger motions involved in gating of the channel. C1 Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA. Lawrence Livermore Natl Lab, Dept Biosci, Livermore, CA 94550 USA. Univ Manchester, Sch Chem, Manchester M13 9L, Lancs, England. RP Law, RJ (reprint author), Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA. EM rlaw@mccammon.ucsd.edu OI Henchman, Richard/0000-0002-0461-6625 NR 84 TC 107 Z9 109 U1 0 U2 5 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 10 PY 2005 VL 102 IS 19 BP 6813 EP 6818 DI 10.1073/pnas.0407739102 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925JD UT WOS:000229048500032 PM 15857954 ER PT J AU Westerberg, S Wang, C Somorjai, GA AF Westerberg, S Wang, C Somorjai, GA TI Heat of adsorption of CO on Pt(111) obtained by sum frequency generation vibrational spectroscopy - a new technique to measure adsorption isotherms SO SURFACE SCIENCE LA English DT Article DE adsorption isotherms; sum frequency generation; chemisorption; platinum; carbon monoxide; single crystal surface ID HIGH-PRESSURE; PHASE RELAXATION; SURFACE; SPECTRA; OXIDATION; SFG; DISSOCIATION; TEMPERATURE; NI(111); MOTION AB CO adsorption on Pi(111) was studied at temperatures between 373 K and 463 K in a pressure range of 1 x 10(-8) - 3 x 10(-5) Torr. Adsorption isotherms were obtained using sum frequency generation, (SFG). By correlating the normalized SFG signal to the surface coverage, the obtained isotherms are in satisfactory agreement with Langmuir adsorption, which is suitable for coverages up to a monolayer. Close to saturation coverage the heat of adsorption was determined to H 3(+/- 15) kJ/mol, which is in close agreement to values obtained by single crystal adsorption calorimetry, low energy electron diffraction (LEED) and temperature programmed desorption (TPD) [Y.Y. Yeo, L. Vattuone. D.A. King.. J. Chem. Phys. 106 (1997) 392; G. Ertl, M. Neumann, K.M. Streit, Surf. Sci. 64 (1977) 393]. (c) 2005 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM staffan@berkeley.edu; somorjai@socrates.berkeley.edu NR 27 TC 15 Z9 15 U1 1 U2 24 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 2005 VL 582 IS 1-3 BP 137 EP 144 DI 10.1016/j.susc.2005.03.011 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 929JD UT WOS:000229341500016 ER PT J AU Barnard, AS Zapol, P Curtiss, LA AF Barnard, AS Zapol, P Curtiss, LA TI Anatase and rutile surfaces with adsorbates representative of acidic and basic conditions SO SURFACE SCIENCE LA English DT Article DE density functional calculations; low index single crystal surfaces; chemisorption; surface relaxation and reconstruction; surface free energy; surface stress; titanium dioxide ID GEL-SOL METHOD; TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; TIO2 NANOPARTICLES; TITANIUM-DIOXIDE; ULTRASOFT PSEUDOPOTENTIALS; MOLECULAR-DYNAMICS; WATER-ADSORPTION; BASIS-SET; SIZE AB Presented here are density functional theory results of the structure and energetics of selected low index stoichiometric surfaces of the anatase and rutile titanium dioxide polymorphs, passivated with complete monolayers of adsorbates chosen to represent acidic and basic conditions. The adsorbates differ in each case by varying the hydrogen to oxygen ratio with respect to a neutral, water-terminated surface. The results are compared for each of the 30 surfaces examined here, to identify relationships between surface chemistry, surface free energy, surface stress and (upper-most) surface tri-layer reconstructions. Within our model, the results show that termination with water consistently results in the lowest values of surface free energy, but not necessarily the lowest surface stress. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Barnard, AS (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. EM amanda.barnard@anl.gov RI Barnard, Amanda/A-7340-2011; Zapol, Peter/G-1810-2012 OI Barnard, Amanda/0000-0002-4784-2382; Zapol, Peter/0000-0003-0570-9169 NR 50 TC 77 Z9 77 U1 2 U2 44 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 2005 VL 582 IS 1-3 BP 173 EP 188 DI 10.1016/j.susc.2005.03.014 PG 16 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 929JD UT WOS:000229341500020 ER PT J AU Gallagher, ME Blizanac, BB Lucas, CA Ross, PN Markovic, NM AF Gallagher, ME Blizanac, BB Lucas, CA Ross, PN Markovic, NM TI Structure sensitivity of CO oxidation on gold single crystal surfaces in alkaline solution: Surface X-ray scattering and rotating disk measurements SO SURFACE SCIENCE LA English DT Article DE X-ray scattering; surface relaxation and reconstruction; gold; carbon monoxide; low index single crystal surfaces; solid-liquid interfaces ID SCANNING-TUNNELING-MICROSCOPY; AU(111) SURFACE; AU(001) RECONSTRUCTION; ACIDIC ELECTROLYTES; ANION ADSORPTION; INTERFACE; AU(100); ELECTROCHEMISTRY; DIFFRACTION; PHASES AB A combination of in situ surface X-ray scattering (SXS) and cyclic voltammetry (CV) measurements have been performed to determine the effect that the surface atomic structure of the low-index faces of Au single crystals has on carbon monoxide (CO) oxidation in alkaline solution. For the (111), (100) and (110) surface orientations, potentiodynamic measurements of the scattered X-ray intensity at key reciprocal lattice points have been employed to determine the potential window of stability for the reconstructed surfaces. By saturation of the electrolyte with CO. the effect that adsorbed CO has on the stability of the reconstructed surfaces has been investigated. The presence of CO acts to stabilize the surface reconstructions over a wider potential range, causing a positive shift in the potential for the lifting of the Au(111) surface reconstruction of similar to 200 mV. In the case of the (100) and (110) orientations, the adsorption of CO stabilizes the reconstruction over the entire potential range studied. The oxidation of dissolved CO was found to be structure-sensitive, with the activity decreasing in the order Au(110)-(1 x 2) > Au(100)-"hex" > Au(111)-(23 x root 3). The structure-sensitivity is correlated with the surface density of low coordinated sites. (c) 2005 Published by Elsevier B.V. C1 Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Lucas, CA (reprint author), Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. EM clucas@liv.ac.uk OI Lucas, Christopher/0000-0001-5743-3868 NR 36 TC 16 Z9 16 U1 1 U2 16 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 2005 VL 582 IS 1-3 BP 215 EP 226 DI 10.1016/j.susc.2005.03.018 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 929JD UT WOS:000229341500024 ER PT J AU King, JA Akli, K Zhang, B Freeman, RR Key, MH Chen, CD Hatchett, SP Koch, JA MacKinnon, AJ Patel, PK Snavely, R Town, RPJ Borghesi, M Romagnani, L Zepf, M Cowan, T Habara, H Kodama, R Toyama, Y Karsch, S Lancaster, K Murphy, C Norreys, P Stephens, R Stoeckl, C AF King, JA Akli, K Zhang, B Freeman, RR Key, MH Chen, CD Hatchett, SP Koch, JA MacKinnon, AJ Patel, PK Snavely, R Town, RPJ Borghesi, M Romagnani, L Zepf, M Cowan, T Habara, H Kodama, R Toyama, Y Karsch, S Lancaster, K Murphy, C Norreys, P Stephens, R Stoeckl, C TI TiK alpha radiography of Cu-doped plastic microshell implosions via spherically bent crystal imaging SO APPLIED PHYSICS LETTERS LA English DT Article ID INSTABILITY; IGNITION; TARGET AB We show that short pulse laser generated Ti K alpha radiation can be used effectively as a backlighter for radiographic imaging. This method of x-ray radiography features high temporal and spatial resolution, high signal to noise ratio, and monochromatic imaging. We present here the Ti K alpha backlit images of six-beam driven spherical implosions of thin-walled 500-mu m Cu-doped deuterated plastic (CD) shells and of similar implosions with an included hollow gold cone. These radiographic results were used to define conditions for the diagnosis of fast ignition relevant electron transport within imploded Cu-doped coned CD shells. (c) 2005 American Institute of Physics. C1 Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Ohio State Univ, Coll Math & Phys Sci, Columbus, OH 43210 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland. Univ Nevada, Dept Phys, Reno, NV 89557 USA. Osaka Univ, Inst Laser Engn, Osaka 565, Japan. Max Planck Inst Quantum Opt, D-85748 Garching, Germany. Gen Atom Co, San Diego, CA 92186 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. RP King, JA (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. EM king55@llnl.gov RI Patel, Pravesh/E-1400-2011; Toyama, Yusuke/H-8023-2012; Borghesi, Marco/K-2974-2012; Zepf, Matt/M-1232-2014; MacKinnon, Andrew/P-7239-2014; Kodama, Ryosuke/G-2627-2016; Cowan, Thomas/A-8713-2011 OI Toyama, Yusuke/0000-0003-3230-1062; MacKinnon, Andrew/0000-0002-4380-2906; Cowan, Thomas/0000-0002-5845-000X NR 11 TC 20 Z9 20 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 9 PY 2005 VL 86 IS 19 AR 191501 DI 10.1063/1.1923178 PG 3 WC Physics, Applied SC Physics GA 930EF UT WOS:000229397900012 ER PT J AU Lin, Y Wang, H Hawley, ME Foltyn, SR Jia, QX AF Lin, Y Wang, H Hawley, ME Foltyn, SR Jia, QX TI The effect of growth rates on the microstructures of EuBa2Cu3O7-x films on SrTiO3 substrates SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; CURRENTS AB We report our detailed studies of the microstructures of EuBa2Cu3O7-x (Eu123) films by using high-resolution x-ray diffraction. Reciprocal space maps show that the growth rate plays an important role in nucleation of a-axis Eu123 films on SrTiO3 (STO) substrates at a given deposition temperature. It is further revealed that a pseudotetragonal distortion often occurs in Eu123 films. This distortion, however, can be eliminated by decreasing the deposition rate. The low mobility of Eu atoms on the STO substrate is suggested to be the main reason for these phenomena. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Lin, Y (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, POB 1663, Los Alamos, NM 87545 USA. EM ylin@lanl.gov; qxjia@lanl.gov RI Jia, Q. X./C-5194-2008; Wang, Haiyan/P-3550-2014; lin, yuan/B-9955-2013 OI Wang, Haiyan/0000-0002-7397-1209; NR 10 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 9 PY 2005 VL 86 IS 19 AR 192508 DI 10.1063/1.1906312 PG 3 WC Physics, Applied SC Physics GA 930EF UT WOS:000229397900056 ER PT J AU Shan, W Walukiewicz, W Ager, JW Yu, KM Yuan, HB Xin, HP Cantwell, G Song, JJ AF Shan, W Walukiewicz, W Ager, JW Yu, KM Yuan, HB Xin, HP Cantwell, G Song, JJ TI Nature of room-temperature photoluminescence in ZnO SO APPLIED PHYSICS LETTERS LA English DT Article ID BAND-EDGE EMISSION; EXCITATION SPECTROSCOPY; EXCITON COMPLEXES; EPITAXIAL LAYERS; SINGLE-CRYSTALS; ZINC-OXIDE; SPECTRUM AB The temperature dependence of the photoluminescence (PL) transitions associated with various excitons and their phonon replicas in high- purity bulk ZnO has been studied at temperatures from 12 K to above room temperature (320 K). Several strong PL emission lines associated with longitudinal optical (LO) phonon replicas of free and bound excitons are clearly observed. The room- temperature PL spectrum is dominated by the phonon replicas of the free exciton transition with the maximum at the first LO phonon replica. The results explain the discrepancy between the transition energy of free exciton determined by reflection measurement and the peak position obtained by the PL measurement. (c) 2005 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. ZN Technol Inc, Brea, CA 92821 USA. Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA. RP Shan, W (reprint author), Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM wshan@lbl.gov RI Yu, Kin Man/J-1399-2012; OI Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751 NR 20 TC 177 Z9 178 U1 8 U2 49 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 9 PY 2005 VL 86 IS 19 AR 191911 DI 10.1063/1.1923757 PG 3 WC Physics, Applied SC Physics GA 930EF UT WOS:000229397900027 ER PT J AU Wolf, PG Karol, KG Mandoli, DF Kuehl, J Arumuganathan, K Ellis, MW Mishler, BD Kelch, DG Olmstead, RG Boore, JL AF Wolf, PG Karol, KG Mandoli, DF Kuehl, J Arumuganathan, K Ellis, MW Mishler, BD Kelch, DG Olmstead, RG Boore, JL TI The first complete chloroplast genome sequence of a lycophyte, Huperzia lucidula (Lycopodiaceae) SO GENE LA English DT Article DE organelle; evolution; gene order ID VASCULAR PLANTS; LAND PLANTS; EVOLUTION; GENERATION; ANGIOSPERM; PHYLOGENY; BRANCH; SCALE; TREE AB We used a unique combination of techniques to sequence the first complete chloroplast genome of a lycophyte, Huperzia lucidula. This plant belongs to a significant clade hypothesized to represent the sister group to all other vascular plants. We used fluorescence-activated cell sorting (FACS) to isolate the organelles, rolling circle amplification (RCA) to amplify the genome, and shotgun sequencing to 8x depth coverage to obtain the complete chloroplast genome sequence. The genome is 154,373 bp, containing inverted repeats of 15,314 bp each, a large single-copy region of 104,088 bp, and a small single-copy region of 19,657 bp. Gene order is more similar to those of mosses, liverworts, and hornworts than to gene order for other vascular plants. For example, the Huperzia chloroplast genome possesses the bryophyte gene order for a previously characterized 30 kb inversion, thus supporting the hypothesis that lycophytes are sister to all other extant vascular plants. The lycophyte chloroplast genome data also enable a better reconstruction of the basal tracheophyte genome, which is useful for inferring relationships among bryophyte lineages. Several unique characters are observed in Huperzia, such as movement of the gene ndhF from the small single copy region into the inverted repeat. We present several analyses of evolutionary relationships among land plants by using nucleotide data, inferred amino acid sequences, and by comparing gene arrangements from chloroplast genomes. The results, while still tentative pending the large number of chloroplast genomes from other key lineages that are soon to be sequenced, are intriguing in themselves, and contribute to a growing comparative database of genomic and morphological data across the green plants. (c) 2005 Elsevier B.V. All rights reserved. C1 Utah State Univ, Dept Biol, Logan, UT 84322 USA. Univ Washington, Dept Biol, Seattle, WA 98195 USA. Univ Washington, Ctr Dev Biol, Seattle, WA 98195 USA. DOE Joint Genome Inst, Walnut Creek, CA 94598 USA. Lawrence Berkeley Lab, Walnut Creek, CA 94598 USA. Benaroya Res Inst Virginia Mason, Seattle, WA 98101 USA. Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Univ Herbarium Jepson Herbarium, Berkeley, CA 94720 USA. RP Wolf, PG (reprint author), Utah State Univ, Dept Biol, 5305 Old Main Hill, Logan, UT 84322 USA. EM wolf@biology.usu.edu RI Wolf, Paul/F-7664-2010; OI Wolf, Paul/0000-0002-4317-6976; Kuehl, Jennifer/0000-0003-2813-2518 NR 36 TC 56 Z9 134 U1 1 U2 15 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD MAY 9 PY 2005 VL 350 IS 2 BP 117 EP 128 DI 10.1016/j.gene.2005.01.018 PG 12 WC Genetics & Heredity SC Genetics & Heredity GA 932NG UT WOS:000229559800003 PM 15788152 ER PT J AU Wagh, AS Natarajan, R McDaniel, RL AF Wagh, AS Natarajan, R McDaniel, RL TI Permafrost cement-1 - New phosphate-based cement useful for drilling, completions in arctic SO OIL & GAS JOURNAL LA English DT Article C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Wagh, AS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM wagh@aol.gov; rnatar2@uic.edu; McDaniel@anl.gov OI Wagh, Arun/0000-0002-8678-7574 NR 9 TC 0 Z9 0 U1 0 U2 0 PU PENNWELL PUBL CO ENERGY GROUP PI TULSA PA 1421 S SHERIDAN RD PO BOX 1260, TULSA, OK 74112 USA SN 0030-1388 J9 OIL GAS J JI Oil Gas J. PD MAY 9 PY 2005 VL 103 IS 18 BP 53 EP 55 PG 3 WC Energy & Fuels; Engineering, Petroleum SC Energy & Fuels; Engineering GA 925LG UT WOS:000229054000012 ER PT J AU Jamison, GM Wheeler, DR Loy, DA Ziller, JW AF Jamison, GM Wheeler, DR Loy, DA Ziller, JW TI Double phosphaalkyne insertion to a tungsten alkylidene: Formation of a diphosphametallabicyclobutane SO ORGANOMETALLICS LA English DT Article ID PHOSPHORUS TRIPLE BOND; METAL-CARBON BONDS; TERMINAL PHOSPHINIDENE; ALKOXIDE LIGAND; COMPLEXES; POLYMERIZATION; REACTIVITY; ALKYNES; METATHESIS; RETROCYCLOADDITIONS AB A unique diphosphametallabicyclobutane complex results from the reaction of the Schrock tungsten neopentylidene with excess P equivalent to C-t-Bu, in contrast to phosphaalkyne reaction products with similar molybdenum alkylidenes. A mechanistic rationalization for the complex, which has been structurally characterized by NMR spectroscopy and single-crystal X-ray analysis, is postulated in terms of a ring-opening metathesis-like mechanism. C1 Sandia Natl Labs, Chem Synthesis & Nanomat Dept, Albuquerque, NM 87185 USA. Sandia Natl Labs, Micrototal Analyt Syst Dept, Albuquerque, NM 87185 USA. Los Alamos Natl Lab, Polymers & Coatings Grp, Los Alamos, NM 87154 USA. Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA. RP Sandia Natl Labs, Chem Synthesis & Nanomat Dept, POB 5800, Albuquerque, NM 87185 USA. EM gmjamis@sandia.gov RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 40 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 EI 1520-6041 J9 ORGANOMETALLICS JI Organometallics PD MAY 9 PY 2005 VL 24 IS 10 BP 2245 EP 2247 DI 10.1021/om050150o PG 3 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 923YM UT WOS:000228945500002 ER PT J AU Henry, RM Shoemaker, RK Newell, RH Jacobsen, GM DuBois, DL DuBois, MR AF Henry, RM Shoemaker, RK Newell, RH Jacobsen, GM DuBois, DL DuBois, MR TI Stereochemical control of iron(II) complexes containing a diphosphine ligand with a pendant nitrogen base SO ORGANOMETALLICS LA English DT Article ID FE-ONLY HYDROGENASE; ACTIVE-SITE; DIHYDROGEN COMPLEXES; CRYSTAL-STRUCTURE; X-RAY; ANGSTROM RESOLUTION; NIFE HYDROGENASE; BRIDGING LIGAND; ACTIVATION; MODEL AB A series of cis and trans Fe(II) complexes containing the diphosphine ligand PNP (where PNP is bis((diethylphosphino)methyl)methylamine) have been prepared and isolated. These include cis-[Fe(PNP)(2)(CH3CN)(2)](BF4)(2) (3), cis-[Fe(PNP)(2)(CH3CN)(CO)](BF4)(2) (4), trans-[Fe(PNP)(dmpm)(CH3CN)(2)](BF4)(2) (5), trans-Fe(PNP)(dmpm)Cl-2 (6), trans- [Fe(PNP)(dmpm)(CO)Cl](2)[FeCl4] (7), trans-HFe(PNP)(dmpm)Cl (8), and trans- [HFe(PNP)(dmpm)(CH3CN)]BPh4 (9) (where dmpm is bis(dimethylphosphino)methane). In addition, the cations trans-[HFe(PNP)(dmpm)(CO)](+) (10) and trans-[(H-2)Fe(PNP)(dmpm)(H)](+) (11) have been observed in solution. These complexes all possess a pendant base that bridges the two phosphorus atoms of the PNP ligand. A cis geometry is observed for those complexes containing two PNP ligands, whereas a trans geometry is observed for the complexes containing one PNP ligand and one dmpm ligand. The molecular structures of cis-[Fe(PNP)(2)(CH3CN)(CO)](BPh4)(2) and trans- [HFe(PNP)(dmpm)(CH3CN)]BPh4 have been confirmed by X-ray diffraction studies. Protonation of 5, 7, and 10 occurs at the nitrogen atom of the PNP ligand, and pK(a) values are reported for the corresponding protonated complexes. The formation of the dihydrogen complex [trans-[(H-2)Fe(PNP)(dmpm)(H)](+) and the protonated PNHP complex trans-[HFe(PNHP)(dmpm)(CO)](2+) demonstrate that intramolecular heterolytic cleavage of the dihydrogen ligand can be controlled by varying the nature of the ligand trans to the incipient dihydrogen ligand. C1 Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP DuBois, DL (reprint author), Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA. EM dan_dubois@nrel.gov; mary.rakowski-dubois@colorado.edu RI Shoemaker, Richard/M-7409-2013 OI Shoemaker, Richard/0000-0002-0805-1449 NR 49 TC 45 Z9 45 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAY 9 PY 2005 VL 24 IS 10 BP 2481 EP 2491 DI 10.1021/om050071c PG 11 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 923YM UT WOS:000228945500029 ER PT J AU Leung, K Rempe, SB AF Leung, K Rempe, SB TI Ab initio molecular dynamics study of glycine intramolecular proton transfer in water SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID HYDRATION FREE-ENERGY; PERIODIC BOUNDARY-CONDITIONS; MONTE-CARLO SIMULATIONS; QUASI-CHEMICAL THEORY; WAVE BASIS-SET; AQUEOUS-SOLUTION; LIQUID WATER; GAS-PHASE; BIS(PENICILLAMINE) ENKEPHALIN; SOLVATION MODELS AB We use ab initio molecular-dynamics simulations to quantify structural and thermodynamic properties of a model proton transfer reaction that converts a neutral glycine molecule, stable in the gas phase, to the zwitterion that predominates in aqueous solution. We compute the potential of mean force associated with the direct intramolecular proton transfer event in glycine. Structural analyses show that the average hydration number (N-w) of glycine is not constant along the reaction coordinate, but rather progresses from N-w=5 in the neutral molecule to N-w=8 for the zwitterion. We report the free-energy difference between the neutral and charged glycine molecules, and the free-energy barrier to proton transfer. Finally, we identify the approximations inherent in our method and estimate the corresponding corrections to our reported thermodynamic predictions. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Leung, K (reprint author), Sandia Natl Labs, MS 1415 & 0310, Albuquerque, NM 87185 USA. EM kleung@sandia.gov RI Rempe, Susan/H-1979-2011 NR 81 TC 71 Z9 72 U1 0 U2 18 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 2005 VL 122 IS 18 AR 184506 DI 10.1063/1.1885445 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 928MK UT WOS:000229275600047 PM 15918728 ER PT J AU Mun, BS Lee, C Stamenkovic, V Markovic, NM Ross, PN AF Mun, BS Lee, C Stamenkovic, V Markovic, NM Ross, PN TI A photoemission study of Pd ultrathin films on Pt(111) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID BINDING-ENERGY; SURFACE; CLUSTERS; ATOMS AB The origin of surface core-level shift (SCLS) of Pd thin films on Pt (111) substrate is investigated. At submonolayer coverage of Pd thin films, the splitting of Pd 3d core-level peaks indicate the contribution of both initial and final states of photoionization processes while no change on valence band (VB) spectra is found. When the coverage of Pd reaches to single monolayer, the final-state relaxation effect on the Pd 3d vanishes and only the initial-state effect, a negative SCLS, is present. Also, the VB spectrum at Pd monolayer films shows a clear band narrowing, that is, the origin of the negative SCLS at monolayer coverage. As the Pd coverage is increased to more than monolayer thickness, the Pd 3d peaks start to show the surface layer contribution from second and third layers and the VB spectra show even narrower bandwidth, possibly due to the formation of surface states and strained effect of Pd adlayers on top of the first pseudomorphic layer. (c) 2005 American Institute of Physics. C1 Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. Samsung Elect Co Ltd, Semicond R&D Ctr, Suwon, South Korea. RP Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Mun, Bongjin /G-1701-2013 NR 16 TC 9 Z9 9 U1 1 U2 6 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 8 PY 2005 VL 122 IS 18 AR 184712 DI 10.1063/1.1897693 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 928MK UT WOS:000229275600071 PM 15918752 ER PT J AU Shirota, H Funston, AM Wishart, JF Castner, EW AF Shirota, H Funston, AM Wishart, JF Castner, EW TI Ultrafast dynamics of pyrrolidinium cation ionic liquids SO JOURNAL OF CHEMICAL PHYSICS LA English DT Review ID FEMTOSECOND OPTICAL KERR; INTERMOLECULAR COORDINATE CONTRIBUTIONS; LOW-FREQUENCY MODES; SOLVATION DYNAMICS; EFFECT SPECTROSCOPY; MOLECULAR-DYNAMICS; RAMAN-SPECTROSCOPY; ASYMMETRIC HYDROGENATION; ORIENTATIONAL DYNAMICS; SOLVENT RELAXATION AB We have investigated the ultrafast molecular dynamics of five pyrrolidinium cation room temperature ionic liquids using femtosecond optical heterodyne-detected Raman-induced Kerr effect spectroscopy. The ionic liquids studied are N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide P-14(+)/NTf2-), N-methoxyethyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide P-1EOE(+)/NTf2-), N-ethoxyethyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide P-1EOE(+)/NTf2-), N-ethoxyethyl-N-methylpyrrolidinium bromide P-1EOE(+), and N-ethoxyethyl-N-methylpyrrolidinium dicyanoamide P-1EOE(+)/DCA(-)). For comparing dynamics among the five ionic liquids, we categorize the ionic liquids into two groups. One group of liquids comprises the three pyrrolidinium cations P-14(+), P-1EOM(+), and P-1EOE(+) paired with the NTf2- anion. The other group of liquids consists of the P-1EOE(+) cation paired with each of the three anions NTf2-, Br-, and DCA(-). The overdamped relaxation for time scales longer than 2 ps has been fit by a triexponential function for each of the five pyrrolidinium ionic liquids. The fast (similar to 2 ps) and intermediate (similar to 20 ps) relaxation time constants vary little among these five ionic liquids. However, the slow relaxation time constant correlates with the viscosity. Thus, the Kerr spectra in the range from 0 to 750 cm(-1) are quite similar for the group of three pyrrolidinium ionic liquids paired with the NTf2- anion. The intermolecular vibrational line shapes between 0 and 150 cm-1 are fit to a multimode Brownian oscillator model; adequate fits required at least three modes to be included in the line shape. (c) 2005 American Institute of Physics. C1 Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Shirota, H (reprint author), Rutgers State Univ, Dept Chem & Chem Biol, Piscataway, NJ 08854 USA. RI Funston, Alison/B-8817-2012; Wishart, James/L-6303-2013 OI Funston, Alison/0000-0002-4320-6434; Wishart, James/0000-0002-0488-7636 NR 108 TC 118 Z9 118 U1 2 U2 44 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 2005 VL 122 IS 18 AR 184512 DI 10.1063/1.1893797 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 928MK UT WOS:000229275600053 PM 15918734 ER PT J AU Neagu, E Borovsky, JE Gary, SP Jorgensen, AM Baumjohann, W Treumann, RA AF Neagu, E Borovsky, JE Gary, SP Jorgensen, AM Baumjohann, W Treumann, RA TI Statistical survey of magnetic and velocity fluctuations in the near-Earth plasma sheet: International Sun Earth Explorer (ISEE-2) measurements SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID SUPERPOSED EPOCH ANALYSIS; SOLAR-WIND; NEUTRAL SHEET; FIELD; AMPTE/IRM; FLOW; CONSTRAINTS; TURBULENCE; TAIL AB [1] International Sun-Earth Explorer (ISEE-2) satellite observations of low-frequency magnetic field and ion velocity fluctuations in the Earth's magnetotail are compared with corresponding observations from the Active Magnetospheric Particle Tracer Explorers/ Ion Release Module (AMPTE/IRM). Solar activity during these two missions is different and thus also considered. The ISEE-2 analysis is performed on the data taken from satellite passes through the Earth's plasma sheet in 1978 and 1979 near solar maximum. The data is divided into 2298 ten-minute-long intervals where the averages of the magnetic field, ion velocity, and plasma parameter's amplitudes are statistically calculated for each interval. We find no significant dependence of the amplitude of the ion velocity and magnetic field fluctuations on the magnetotail distance or on the distance from the neutral sheet. The correlation coefficient between the geomagnetic activity and the amplitude of both ion velocity and magnetic field fluctuations in the ISEE-2 measurements is smaller than the one found for the AMPTE/IRM passes through the plasma sheet. When comparing the two satellite data sets for the same plasma sheet region, we obtain a significantly higher upper bound for the ISEE-2 fluctuating magnetic field energy density. Our results suggest that the significantly increased magnetic field fluctuation amplitude in the plasma sheet during the ISEE-2 satellite passes is due to the increased solar activity near solar maximum. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria. Max Planck Inst Extraterr Phys, D-85748 Garching, Germany. RP Neagu, E (reprint author), Los Alamos Natl Lab, Mail Stop D466,Grp ISR-1, Los Alamos, NM 87545 USA. EM kd5hvz@yahoo.ca RI Baumjohann, Wolfgang/A-1012-2010 OI Baumjohann, Wolfgang/0000-0001-6271-0110 NR 26 TC 7 Z9 7 U1 0 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 7 PY 2005 VL 110 IS A5 AR A05203 DI 10.1029/2004JA010448 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 926UI UT WOS:000229148300001 ER PT J AU Bae, HJ Norton, DP Sigman, J Boatner, L AF Bae, HJ Norton, DP Sigman, J Boatner, L TI Low dielectric losses in annealed Ti-doped K(Ta,Nb)O-3 thin films grown by pulsed laser deposition SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID POTASSIUM-TANTALATE; DEVICE APPLICATIONS; CRYSTALS; KTA1-XNBXO3; RELAXATION; TARGETS; RANGE AB We have investigated the dielectric properties of Ti-doped K(Ta,Nb)O-3 fill S Subjected to high temperature annealing. Titanium (+4) substitution on the Nb/Ta site introduces an acceptor state, thus reducing dielectric losses due to defect-related donor states. Using 3% Ti-doped targets, K(Ta,Nb)O-3 : Ti films were grown on MgO (001) crystals by pulsed-laser deposition. The films were annealed in oxygen at temperatures as high as 1000&DEG; C. A loss tangent of 0.002 at room temperature was observed for annealed Ti-doped K(Ta,Nb)O-3 thin films. A reduction in tunability was also seen. For these annealed films, the dielectric loss shows little temperature dependence, indicating a significant reduction in donor density due to defects. C1 Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32603 USA. Sandia Natl Labs, Albuquerque, NM 87175 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Bae, HJ (reprint author), Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32603 USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 28 TC 6 Z9 6 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD MAY 7 PY 2005 VL 38 IS 9 BP 1331 EP 1336 DI 10.1088/0022-3727/38/9/001 PG 6 WC Physics, Applied SC Physics GA 932KL UT WOS:000229552500002 ER PT J AU Catledge, SA Vohra, YK Mirkarimi, PB AF Catledge, SA Vohra, YK Mirkarimi, PB TI Low temperature growth of nanostructured diamond on quartz spheres SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; FILMS; NUCLEATION; COATINGS; OXYGEN; GLASS AB Nanostructured diamond was grown by microwave plasma chemical vapour deposition onto 2 mm diameter quartz spheres using a H-2/CH4/N-2 feedgas mixture high in methane concentration (15% by volume). Deposition experiments were performed at low temperature (< 425&DEG; C, below the temperature limit of the optical pyrometer used) as well as at high temperature (830&DEG; C). Nucleation and growth of nanostructured diamond was found to occur readily in both cases. In addition, it was found that pre-treatment scratching is not necessary for achieving high diamond nucleation/growth rates on quartz, although scratching did result in a more uniform and smooth surface morphology, especially for low temperature deposition. All films grown at low temperature resulted in higher diamond quality with less amorphous carbon and non-diamond components. Plasma reduction of the exposed silica surface to create oxygen-containing species near the substrate surface may explain the improved diamond quality and practical nucleation/growth rates at such low temperature. C1 Univ Alabama, Dept Phys, Birmingham, AL 35294 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Catledge, SA (reprint author), Univ Alabama, Dept Phys, Birmingham, AL 35294 USA. NR 15 TC 12 Z9 13 U1 2 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD MAY 7 PY 2005 VL 38 IS 9 BP 1410 EP 1414 DI 10.1088/0022-3727/38/9/013 PG 5 WC Physics, Applied SC Physics GA 932KL UT WOS:000229552500014 ER PT J AU Medina, DC Li, X Springer, CS AF Medina, DC Li, X Springer, CS TI Pharmaco-thermodynamics of deuterium-induced oedema in living rat brain via (H2O)-H-1 MRI: implications for boron neutron capture therapy of malignant brain tumours SO PHYSICS IN MEDICINE AND BIOLOGY LA English DT Article ID HEAVY-WATER; NUDE-MICE; HUMAN CARCINOMA; DEUTERATION; CELLS; OXIDE; IRRADIATION; HYDROGEN; ISOTOPE; GROWTH AB In addition to its common usage as a tracer in metabolic and physiological studies, deuterium possesses anti-tumoural activity and confers protection against gamma-irradiation. A more recent interest in deuterium emanates from the search for alternatives capable of improving neutron penetrance whilst reducing healthy tissue radiation dose deposition in boron neutron capture therapy of malignant brain tumours. Despite this potential clinical application, deuterium induces brain oedema, which is detrimental to neutron capture therapy. In this study, five adult male rats were titrated with deuterated drinking water while brain oedema was monitored via water proton magnetic resonance imaging. This report concludes that deuterium, as well as deuterium-induced brain oedema, possesses a uniform brain bio-distribution. At a steady-state blood fluid deuteration value of 16%, when the deuterium isotope fraction in drinking water was 25%, a mean oedematous volume change of 9 +/- 2% (p-value < 0.001) was observed in the rat brain-this may account for neurological and behavioural abnormalities found in mammals drinking highly deuterated water. In addition to characterizing the pharmaco-thermodynamics of deuterium-induced oedema, this report also estimates the impact of oedema on thermal neutron enhancement and effective dose reduction factors using simple linear transport calculations. While body fluid deuteration enhances thermal neutron flux penetrance and reduces dose deposition, oedema has the opposite effect because it increases the volume of interest, e.g., the brain volume. Thermal neutron enhancement and effective dose reduction factors could be reduced by as much as similar to 10% in the presence of a 9% water volume increase (oedema). C1 Columbia Univ, Coll Phys & Surg, New York, NY 10027 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Oregon Hlth & Sci Univ, Adv Imaging Res Ctr, Portland, OR 97239 USA. RP Medina, DC (reprint author), Columbia Univ, Coll Phys & Surg, New York, NY 10027 USA. EM dcm2l04@columbia.edu OI Springer, Charles/0000-0002-5966-2135 FU NIBIB NIH HHS [R01 EB00422] NR 40 TC 3 Z9 3 U1 0 U2 4 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 2005 VL 50 IS 9 BP 2127 EP 2139 DI 10.1088/0031-9951/50/9/014 PG 13 WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging SC Engineering; Radiology, Nuclear Medicine & Medical Imaging GA 930LP UT WOS:000229417700015 PM 15843741 ER PT J AU Huang, Y Yang, J Shen, J Chen, FQF Yu, YN AF Huang, Y Yang, J Shen, J Chen, FQF Yu, YN TI Sphingolipids are involved in N-methyl-N '-nitro-N-nitrosoguanidine-induced epidermal growth factor receptor clustering SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article DE sphingolipids; epidermal growth factor receptor; lipid raft; lipidomics ID RICH MEMBRANE RAFTS; LIPID RAFTS; MASS-SPECTROMETRY; CELLULAR-RESPONSES; ULTRAVIOLET-LIGHT; CD95 FAS/APO-1; CERAMIDE; ACTIVATION; APOPTOSIS; CELLS AB Previously we have found that N-methyl-N'-nitro-N-nitrosoguanidine (MNNG), an alkylating agent, can induce the Clustering of cellular surface receptors including tumor necrosis factor receptor (TNFR) and epidermal growth factor receptor (EGFR). Since sphingolipids, especially ceramide, have been suggested as major players in ligand-induced receptor clustering, their involvement in this ligand-independent, chemical-induced receptor Clustering was evaluated. It was shown that MNNG-induced EGFR clustering occurred primarily at lipid rafts, as nystatin, which can disrupt lipid raft structure, significantly decreasing MNNG-induced EGFR clustering. Lipidomic studies revealed that MNNG treatment induced profound changes in sphingolipids metabolism, which were not the same as those induced by EGF treatment. Acid sphingomyelinase (ASM) is responsible for hydrolyzing sphingomyelin to generate ceramide, and it was demonstrated that MNNG treatment caused ASM distribution changing from diffused state to concentrated area of cells, which colocalized with lipid rafts. Nystatin treatment also abolished the redistribution of ASM. In addition, blockage of ceramide production by ASM inhibitor imipramine interrupted MNNG-induced receptor clustering. Taken together, these data suggested that sphingolipids are involved in MNNG-induced receptor clustering; however, the specific species involved may be different from those involved in EGF-mediated receptor Clustering. (c) 2005 Elsevier Inc. All rights reserved. C1 Zhejiang Univ, Sch Med, Ctr Environm Genom, Dept Pathol & Pathophysiol, Hangzhou 310031, Zhejiang, Peoples R China. Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Yang, J (reprint author), Zhejiang Univ, Sch Med, Ctr Environm Genom, Dept Pathol & Pathophysiol, Hangzhou 310031, Zhejiang, Peoples R China. EM gastate@zju.edu.cn OI Huang, Yun/0000-0001-5950-9168 FU NCI NIH HHS [P50 CA112970, CA95393-01, R21 CA095393, U54 CA112970, U54 CA112970-05] NR 39 TC 11 Z9 21 U1 0 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD MAY 6 PY 2005 VL 330 IS 2 BP 430 EP 438 DI 10.1016/j.bbrc.2005.03.002 PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 915PH UT WOS:000228315800012 PM 15796901 ER PT J AU Bosl, WJ Li, R AF Bosl, WJ Li, R TI Mitotic-exit control as an evolved complex system SO CELL LA English DT Review ID IN-VITRO REGULATION; CELL-CYCLE; BUDDING YEAST; CDC14 LOCALIZATION; POLO KINASE; NETWORKS; LTE1; COORDINATION; SEGREGATION; EVOLUTION AB The exit from mitosis is the last critical decision during a cell-division cycle. A complex regulatory system has evolved to evaluate the success of mitotic events and control this decision. Whereas outstanding genetic work in yeast has led to rapid discovery of a large number of interacting genes involved in the control of mitotic exit, it has also become increasingly difficult to comprehend the logic and mechanistic features embedded in the complex molecular network. Our view is that this difficulty stems in part from the attempt to explain mitotic-exit control using concepts from traditional top-down engineering design, and that exciting new results from evolutionary engineering design applied to networks and electronic circuits may lend better insights. We focus on four particularly intriguing features of the mitotic-exit control system and attempt to examine these features from the perspective of evolutionary design and complex system engineering. C1 Univ Calif Davis, Davis Canc Ctr, Sacramento, CA 95817 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Harvard Univ, Sch Med, Dept Cell Biol, Boston, MA 02115 USA. RP Bosl, WJ (reprint author), Univ Calif Davis, Davis Canc Ctr, Sacramento, CA 95817 USA. EM bosl@llnl.gov; rong_li@hms.harvard.edu FU NHGRI NIH HHS [K01 HG003418-02]; NIGMS NIH HHS [GM 059964, GM 059964-06S1] NR 53 TC 39 Z9 39 U1 0 U2 0 PU CELL PRESS PI CAMBRIDGE PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA SN 0092-8674 J9 CELL JI Cell PD MAY 6 PY 2005 VL 121 IS 3 BP 325 EP 333 DI 10.1016/j.cell.2005.04.006 PG 9 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 925DL UT WOS:000229031600004 PM 15882616 ER PT J AU Auperin, TC Bolduc, GR Baron, MJ Heroux, A Filman, DJ Madoff, LC Hogle, JM AF Auperin, TC Bolduc, GR Baron, MJ Heroux, A Filman, DJ Madoff, LC Hogle, JM TI Crystal structure of the n-terminal domain of the group B Streptococcus alpha C protein SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID PSEUDOTUBERCULOSIS INVASIN PROTEIN; FIBROBLAST-GROWTH-FACTOR; INTEGRIN-BINDING; EPITHELIAL-CELLS; HUMAN FIBRONECTIN; HETERODIMERIC DISINTEGRIN; PROTECTIVE EPITOPES; ANTIGEN GENE; HEPARIN; IDENTIFICATION AB Group B Streptococcus (GBS) is the leading cause of bacterial pneumonia, sepsis, and meningitis among neonates and an important cause of morbidity among pregnant women and immunocompromised adults. Invasive diseases due to GBS are attributed to the ability of the pathogen to translocate across human epithelial surfaces. The alpha C protein (ACP) has been identified as an invasin that plays a role in internalization and translocation of GBS across epithelial cells. The soluble N-terminal domain of ACP (NtACP) blocks the internalization of GBS. We determined the 1.86-angstrom resolution crystal structure of NtACP comprising residues Ser(52) through Leu(225) of the full-length ACP. NtACP has two domains, an N-terminal beta-sandwich and a C-terminal three-helix bundle. Structural and topological alignments reveal that the beta-sandwich shares structural elements with the type III fibronectin fold (FnIII), but includes structural elaborations that make it unique. We have identified a potential integrin-binding motif consisting of Lys-Thr-Asp(146), Arg(110), and Asp(118). A similar arrangement of charged residues has been described in other invasins. ACP shows a heparin binding activity that requires NtACP. We propose a possible heparin-binding site, including one surface of the three-helix bundle, and nearby portions of the sandwich and repeat domains. We have validated this prediction using assays of the heparin binding and cell-adhesion properties of engineered fragments of ACP. This is the first crystal structure of a member of the highly conserved Gram-positive surface alpha-like protein family, and it will enable the internalization mechanism of GBS to be dissected at the atomic level. C1 Harvard Univ, Sch Med, Dept Biol Chem & Mol Pharmacol, Boston, MA 02115 USA. Harvard Univ, Sch Med, Brigham & Womens Hosp, Channing Lab,Dept Med, Boston, MA 02115 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Hogle, JM (reprint author), Harvard Univ, Sch Med, Dept Biol Chem & Mol Pharmacol, 240 Longwood Ave, Boston, MA 02115 USA. EM jhogle@hms.harvard.edu OI Hogle, James/0000-0002-3655-1504 FU NIAID NIH HHS [R01 AI020566, AI38424] NR 71 TC 12 Z9 12 U1 0 U2 3 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 6 PY 2005 VL 280 IS 18 BP 18245 EP 18252 DI 10.1074/jbc.M412391200 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 922AH UT WOS:000228807200083 PM 15753100 ER PT J AU Shin, DH Oganesyan, N Jancarik, J Yokota, H Kim, R Kim, SH AF Shin, DH Oganesyan, N Jancarik, J Yokota, H Kim, R Kim, SH TI Crystal structure of a nicotinate phosphoribosyltransferase from Thermoplasma acidophilum SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID QUINOLINIC ACID PHOSPHORIBOSYLTRANSFERASE; LIFE-SPAN EXTENSION; SACCHAROMYCES-CEREVISIAE; CALORIE RESTRICTION; PROTEIN; BIOSYNTHESIS; SPECIFICITY; DATABASE; PATHWAY; DOMAIN AB We have determined the crystal structure of nicotinate phosphoribosyltransferase from Themoplasma acidophilum (TaNAPRTase). The TaNAPRTase has three domains, an N-terminal domain, a central functional domain, and a unique C-terminal domain. The crystal structure revealed that the functional domain has a type II phosphoribosyltransferase fold that may be a common architecture for both nicotinic acid and quinolinic acid (QA) phosphoribosyltransferases (PRTase) despite low sequence similarity between them. Unlike QAPRTase, TaNAPRTase has a unique extra C-terminal domain containing a zinc knuckle-like motif containing 4 cysteines. The TaNAPRTase forms a trimer of dimers in the crystal. The active site pocket is formed at dimer interfaces. The complex structures with phosphoribosylpyrophosphate (PRPP) and nicotinate mononucleotide (NAMN) showed, surprisingly, that functional residues lining on the active site of TaNAPRTase are quite different from those of QAPRTase, although their substrates are quite similar to each other. The phosphate moiety of PRPP and NAMN is anchored to the phosphate-binding loops formed by backbone amides, as found in many alpha/beta barrel enzymes. The pyrophosphate moiety of PRPP is located at the entrance of the active site pocket, whereas the nicotinate moiety of NAMN is located deep inside. Interestingly, the nicotinate moiety of NAMN is intercalated between highly conserved aromatic residues Tyr(21) and Phe(138). Careful structural analyses combined with other NAPRTase sequence subfamilies reveal that TaNAPRTase represents a unique sequence subfamily of NAPRTase. The structures of TaNAPRTase also provide valuable insight for other sequence subfamilies such as pre-B cell colony-enhancing factor, known to have nicotinamide phosphoribosyltransferase activity. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. RP Kim, SH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. EM SHKim@cchem.berkeley.edu FU NIGMS NIH HHS [GM 62412] NR 34 TC 27 Z9 29 U1 0 U2 3 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 6 PY 2005 VL 280 IS 18 BP 18326 EP 18335 DI 10.1074/jbc.M501622200 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 922AH UT WOS:000228807200092 PM 15753098 ER PT J AU Kassianov, EI Barnard, JC Ackerman, TP AF Kassianov, EI Barnard, JC Ackerman, TP TI Retrieval of aerosol microphysical properties using surface MultiFilter Rotating Shadowband Radiometer (MFRSR) data: Modeling and observations SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID ATMOSPHERIC RADIATION MEASUREMENT; SINGLE SCATTERING ALBEDO; OPTICAL-PROPERTIES; MEXICO-CITY; TROPOSPHERIC AEROSOLS; SIZE DISTRIBUTIONS; CLIMATE; DEPTH; PYRANOMETER; INSTRUMENT AB [1] MultiFilter Rotating Shadowband Radiometers (MFRSRs) are widely deployed over the world. These radiometers measure the total, direct, and diffuse components of shortwave, narrowband irradiance at six wavelengths. For five of these wavelengths, aerosol optical depths and single scattering albedos can be retrieved. We describe here a simple retrieval technique that can significantly extend the capability of the MFRSR to study atmospheric aerosols and can provide a means for simultaneous retrieval of the mean particle radius, total number of particles ( for an assumed size distribution), and the imaginary refractive index. This technique is based on measurements of the direct irradiances at two wavelengths (0.415 mu m and 0.870 mu m) and the diffuse irradiance at 0.415 mu m. Our technique requires assumptions regarding the shape of the aerosol size distribution, and the real part of the refractive index, as well as an estimate of the surface albedo at 0.415 mu m. Given plausible values of these quantities, sensitivity tests show that successful retrievals of aerosol characteristics can be achieved. However, the retrieval does not work when the aerosol is dominated by coarse mode particles such as dust, because of the weak dependence of aerosol optical thickness on wavelength. The technique has been applied to derive time series of aerosol microphysical properties from MFRSR measurements taken during a single day, 27 April 2003, of the Mexico City Metropolitan Area field campaign. Additionally, MFRSR-derived aerosol properties are in good agreement with Aerosol Robotic Network (AERONET) retrievals made also in Mexico City. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Kassianov, EI (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd,POB 999, Richland, WA 99352 USA. EM evgueni.kassianov@pnl.gov NR 36 TC 19 Z9 20 U1 1 U2 11 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 6 PY 2005 VL 110 IS D9 AR D09201 DI 10.1029/2004JD005337 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 926TP UT WOS:000229146100002 ER PT J AU VanCuren, RA Cliff, SS Perry, KD Jimenez-Cruz, M AF VanCuren, RA Cliff, SS Perry, KD Jimenez-Cruz, M TI Asian continental aerosol persistence above the marine boundary layer over the eastern North Pacific: Continuous aerosol measurements from Intercontinental Transport and Chemical Transformation 2002 (ITCT 2K2) SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID LONG-RANGE TRANSPORT; WESTERN UNITED-STATES; APRIL 1998; MAUNA-LOA; DUST EVENTS; CALIFORNIA; EMISSIONS; AMERICA AB [1] We report analyses of aerosols collected for the 2002 Intercontinental Transport and Chemical Transformation experiment (ITCT-2K2). Sampling was conducted 15 April to 25 May 2002. Data are from three sites: a sea level site at Trinidad Head, California, a coastal mountain site 1 km altitude ( Trinity Alps), and an inland mountain site near 2 km altitude ( Mount Lassen). Aerosols were continuously collected in eight size bins (0.09 to 10 micrometers aerodynamic diameter) using eight-stage rotating drum impactors. Samples were analyzed in 3-hour time steps by synchrotron x-ray fluorescence. We find the following. ( 1) Aerosol chemical composition at Trinidad Head was generally dominated by marine aerosols with varying minor contributions from local sources. Despite the presence of Asian continental aerosol above the marine boundary layer, significant concentrations of Asian aerosols were observed at sea level only during a strong frontal passage between 22 and 25 April. ( 2) At the elevated sites, aerosol elemental composition was predominantly Asian despite wide swings in concentration. Analysis of soil-forming elements shows that Asian continental dust and associated combustion products overwhelmed local-source aerosols through the first half of the sampling period; in the latter half, Asian aerosols present in the free troposphere were regularly delivered to the mountain sampling sites by nocturnal subsidence. ( 3) Asian aerosols in the lower free troposphere, although highly variable, were very persistent, not arriving only in discrete "transport events.'' We conclude that throughout the experiment the aerosols in the lower free troposphere over the northeastern Pacific Ocean and western North America were dominated by continental outflow from Asia, with little marine or North American continental influence. Viewed in the context of previously published analyses of the long-term aerosol history for Mount Lassen that showed frequent, strong Asian influence throughout spring, summer, and fall, the Asian impact appears likely to be quasicontinuous for much of the year. C1 Univ Calif Davis, Dept Appl Sci, Calif Air Resources Board, Res Div,Atmospher Proc Res Sect, Sacramento, CA 95812 USA. Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Univ Utah, Dept Meteorol, Salt Lake City, UT 84112 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Univ Calif Davis, Dept Appl Sci, Calif Air Resources Board, Res Div,Atmospher Proc Res Sect, 1001 I St,Box 2815, Sacramento, CA 95812 USA. EM rvancure@arb.ca.gov NR 27 TC 108 Z9 110 U1 1 U2 6 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 6 PY 2005 VL 110 IS D9 AR D09S90 DI 10.1029/2004JD004973 PG 19 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 926TP UT WOS:000229146100001 ER PT J AU Wigley, TML Ammann, CM Santer, BD Raper, SCB AF Wigley, TML Ammann, CM Santer, BD Raper, SCB TI Effect of climate sensitivity on the response to volcanic forcing SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID TEMPERATURE RECORDS; SIMULATIONS; MODEL; SIGNAL; ENSO AB [1] The results from 16 coupled atmosphere/ocean general circulation model (AOGCM) simulations are used to reduce internally generated noise and to obtain an improved estimate of the underlying response of 20th century global mean temperature to volcanic forcing. An upwelling diffusion energy balance model (UD EBM) with the same forcing and the same climate sensitivity as the AOGCM is then used to emulate the AOGCM results. The UD EBM and AOGCM results are in very close agreement, justifying the use of the UD EBM to determine the volcanic response for different climate sensitivities. The maximum cooling for any given eruption is shown to depend approximately on the climate sensitivity raised to power 0.37. After the maximum cooling for low-latitude eruptions the temperature relaxes back toward the initial state with an e-folding time of 29 - 43 months for sensitivities of 1 - 4 degrees C equilibrium warming for CO2 doubling. Comparisons of observed and modeled coolings after the eruptions of Agung, El Chichon, and Pinatubo give implied climate sensitivities that are consistent with the Intergovernmental Panel on Climate Change (IPCC) range of 1.5 - 4.5 degrees C. The cooling associated with Pinatubo appears to require a sensitivity above the IPCC lower bound of 1.5 degrees C, and none of the observed eruption responses rules out a sensitivity above 4.5 degrees C. C1 Natl Ctr Atmospher Res, Boulder, CO 80307 USA. Lawrence Livermore Natl Lab, PCMDI, Livermore, CA 94550 USA. Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England. Alfred Wegener Inst Polar & Marine Res, D-2850 Bremerhaven, Germany. RP Wigley, TML (reprint author), Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA. EM wigley@ucar.edu; ammann@ucar.edu; santer1@llnl.gov; s.raper@uea.ac.uk RI Wigley, Tom/B-4705-2008; Santer, Benjamin/F-9781-2011 NR 31 TC 78 Z9 78 U1 1 U2 11 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 6 PY 2005 VL 110 IS D9 AR D09107 DI 10.1029/2004JD005557 PG 8 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 926TP UT WOS:000229146100003 ER PT J AU Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M da Costa, JG Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Unel, MK Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, T Litvintsev, DO Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Plunkett, R Pompo, A Pondrom, L Pope, G Pratt, T Prokoshin, F Pronko, A Proudfoot, J Ptohos, F Poukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spinella, F Spiropulu, M Spiegel, L Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Beretvas, A Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Bocci, A Bodek, A Bolla, G Bolshov, A Bortoletto, D Boudreau, J Bromberg, C Brubaker, E Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Campbell, M Carithers, W Carlsmith, D Castro, A Cauz, D Cerri, A Cerrito, L Chapman, J Chen, C Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S de Barbaro, P De Cecco, S Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Erbacher, R Errede, D Errede, S Eusebi, R Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Friedman, J Furic, I Gallinaro, M Garcia-Sciveres, M Garfinkel, AF Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Gresele, A Grosso-Pilcher, C Guenther, M da Costa, JG Haber, C Hahn, SR Halkiadakis, E Handler, R Happacher, F Hara, K Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hou, S Huffman, BT Hughes, R Huston, J Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwata, Y Iyutin, B James, E Jones, M Kamon, T Kang, J Unel, MK Kartal, S Kasha, H Kato, Y Kennedy, RD Kephart, R Kilminster, B Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kuznetsova, N Laasanen, AT Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Lewis, JD Li, K Lin, CS Lindgren, M Liss, TM Liu, T Litvintsev, DO Lockyer, NS Loginov, A Loreti, M Lucchesi, D Lukens, P Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martin, M Martin, A Martin, V Martinez, M Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Miscetti, S Mitselmakher, G Moggi, N Moore, R Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Nachtman, J Nahn, S Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Newman-Holmes, C Nigmanov, T Nodulman, L Oh, SH Oh, YD Ohsugi, T Okusawa, T Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Phillips, TJ Piacentino, G Piedra, J Pitts, KT Plunkett, R Pompo, A Pondrom, L Pope, G Pratt, T Prokoshin, F Pronko, A Proudfoot, J Ptohos, F Poukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reichold, A Renton, P Rescigno, M Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Sill, A Sinervo, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Spezziga, M Spinella, F Spiropulu, M Spiegel, L Stefanini, A Strologas, J Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takashima, R Takikawa, K Tanaka, M Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Waters, D Watts, T Weber, M Wester, WC Whitehouse, B Wicklund, AB Wicklund, E Williams, HH Wilson, P Winer, BL Wolbers, S Wolter, M Worm, S Wu, X Wurthwein, F Yang, UK Yao, W Yeh, GP Yi, K Yoh, J Yoshida, T Yu, I Yu, S Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Measurement of charged-particle multiplicities in gluon and quark jets in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID E+E-ANNIHILATION; HADRON SPECTRA; QCD JETS; EVENTS; HEAVY; FRAGMENTATION; DISTRIBUTIONS; DECAYS; PARTON AB We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, N-q and N-g, produced at the Fermilab Tevatron in p (p) over bar collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of theta(c)=0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q=E-jet theta(c) varies in the range from 12 to 25 GeV. At Q=19.2 GeV, the ratio of multiplicities r=N-g/N-q is found to be 1.64 +/- 0.17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations. C1 Univ Florida, Gainesville, FL 32611 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Penn, Philadelphia, PA 19104 USA. Univ Michigan, Ann Arbor, MI 48109 USA. MIT, Cambridge, MA 02139 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Waseda Univ, Tokyo 169, Japan. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Purdue Univ, W Lafayette, IN 47907 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Davis, Davis, CA 95616 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Univ Wisconsin, Madison, WI 53706 USA. Duke Univ, Durham, NC 27708 USA. Rockefeller Univ, New York, NY 10021 USA. Brandeis Univ, Waltham, MA 02254 USA. Univ Rochester, Rochester, NY 14627 USA. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Univ Illinois, Urbana, IL 61801 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Geneva, CH-1211 Geneva, Switzerland. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Rome 1, Inst Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy. Yale Univ, New Haven, CT 06520 USA. Harvard Univ, Cambridge, MA 02138 USA. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Texas A&M Univ, College Stn, TX 77843 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Northwestern Univ, Evanston, IL 60208 USA. Osaka City Univ, Osaka 588, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. UCL, London WC1E 6BT, England. Inst Theoret & Expt Phys, Moscow 117259, Russia. Tufts Univ, Medford, MA 02155 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. RP Acosta, D (reprint author), Univ Florida, Gainesville, FL 32611 USA. RI Cabrera Urban, Susana/H-1376-2015; Prokoshin, Fedor/E-2795-2012; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Ivanov, Andrew/A-7982-2013; Kim, Soo-Bong/B-7061-2014; Scodellaro, Luca/K-9091-2014; Connolly, Amy/J-3958-2013; Lancaster, Mark/C-1693-2008; Ruiz, Alberto/E-4473-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012 OI Prokoshin, Fedor/0000-0001-6389-5399; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Ivanov, Andrew/0000-0002-9270-5643; Scodellaro, Luca/0000-0002-4974-8330; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816 NR 30 TC 13 Z9 13 U1 1 U2 4 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 6 PY 2005 VL 94 IS 17 AR 171802 DI 10.1103/PhysRevLett.94.171802 PG 6 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200012 ER PT J AU Allison, IF Davies, CTH Gray, A Kronfeld, AS Mackenzie, PB Simone, JN AF Allison, IF Davies, CTH Gray, A Kronfeld, AS Mackenzie, PB Simone, JN CA HPQCD Fermilab Lattice Collaborati UCQCD Collaboration TI Mass of the B-c meson in three-flavor lattice QCD SO PHYSICAL REVIEW LETTERS LA English DT Article ID EFFECTIVE FIELD-THEORY; DYNAMICAL QUARKS; DECAY CONSTANTS; HEAVY QUARKS; 2+1 FLAVORS; SPECTROSCOPY AB We use lattice QCD to predict the mass of the B-c meson. We use the MILC Collaboration's ensembles of lattice gauge fields, which have a quark sea with two flavors much lighter than a third. Our final result is m(Bc)=6304&PLUSMN; 12(-0)(+18) MeV. The first error bar is a sum in quadrature of statistical and systematic uncertainties, and the second is an estimate of heavy-quark discretization effects. C1 Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Allison, IF (reprint author), Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. NR 37 TC 75 Z9 75 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 6 PY 2005 VL 94 IS 17 AR 172001 DI 10.1103/PhysRevLett.94.172001 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200013 PM 15904281 ER PT J AU Aubert, B Barate, R Boutigny, D Couderc, F Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Schroeder, T 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, AE 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 Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T 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 Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ 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 Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R 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 Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Di Lodovico, F 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 Hodgkinson, MC Lafferty, GD Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Lazzaro, A Lombardo, V 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 Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G 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 Lu, M 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 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 Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, M Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, J Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA 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 Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R 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 Karyotakis, Y Lees, JP Poireau, V Tisserand, V Zghiche, A Grauges-Pous, E 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 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 Schroeder, T 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, AE 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 Weinstein, AJR Foulkes, SD Gary, JW Long, O Shen, BC Wang, K del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Eisner, AM Heusch, CA Kroseberg, J Lockman, WS Nesom, G Schalk, T 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 Blanc, F Bloom, P Chen, S Ford, WT Nauenberg, U Olivas, A Rankin, P Ruddick, WO Smith, JG Ulmer, KA Zhang, J Zhang, L Chen, A Eckhart, EA Harton, JL Soffer, A Toki, WH Wilson, RJ Zeng, Q Spaan, B Altenburg, D Brandt, T Brose, J Dickopp, M Feltresi, E Hauke, A Lacker, HM Nogowski, R Otto, S Petzold, A Schubert, J Schubert, KR Schwierz, R Sundermann, JE Bernard, D Bonneaud, GR Grenier, P Schrenk, S Thiebaux, C Vasileiadis, G Verderi, M Bard, DJ Clark, PJ 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 Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R 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 Brandenburg, G Chaisanguanthum, KS Morii, M Won, E Dubitzky, RS Langenegger, U Marks, J Uwer, U Bhimji, W Bowerman, DA Dauncey, PD Egede, U Gaillard, JR Morton, GW Nash, JA Nikolich, MB Taylor, GP Charles, MJ Grenier, GJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Rubin, AE Yi, J Arnaud, N Davier, M Giroux, X Grosdidier, G Hocker, A Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Wormser, G Cheng, CH Lange, DJ Simani, MC Wright, DM Bevan, AJ Chavez, CA Coleman, JP Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Parry, RJ Payne, DJ Touramanis, C Cormack, CM Di Lodovico, F 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 Hodgkinson, MC Lafferty, GD Williams, JC Chen, C Farbin, A Hulsbergen, WD Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Koeneke, K Sciolla, G Sekula, SJ Taylor, F Yamamoto, RK Patel, PM Robertson, SH Lazzaro, A Lombardo, V 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 Snoek, HL Wilden, L Jessop, CP LoSecco, JM Allmendinger, T Benelli, G 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 Lu, M 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 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 Roos, L Therin, G Behera, PK Gladney, L Guo, QH Panetta, J Biasini, M Covarelli, R Pioppi, M Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Simi, G 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 D'Orazio, A Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Li Gioi, L Mazzoni, MA Morganti, S Pierini, M Piredda, G Polci, F Tehrani, FS Voena, C Christ, S Schroder, H Wagner, G Waldi, R Adye, T De Groot, N Franek, B Gopal, GP Olaiya, EO Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Wilson, JR Yumiceva, FX Abe, T Allen, M Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Claus, R Convery, MR Cristinziani, M De Nardo, G Dingfelder, JC Dong, D Dorfan, J Dujmic, D Dunwoodie, W 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 Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Soha, A Stelzer, J Strube, J Su, D Sullivan, MK Thompson, J Va'vra, J Wagner, SR Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Young, CC Burchat, PR Edwards, AJ Majewski, SA 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 Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Martinez-Vidal, F Panvini, RS Banerjee, S Bhuyan, B Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Sobie, RJ Back, JJ Harrison, PF Mohanty, GB Band, HR Chen, X Cheng, B Dasu, S Datta, M Eichenbaum, AM Flood, KT Graham, M Hollar, JJ Johnson, JR Kutter, PE Li, H Liu, R Mihalyi, A Pan, Y Prepost, R Tan, P von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Greene, MG Neal, H CA BaBar Collaboration TI Search for factorization-suppressed B ->chi K-c((*)) decays SO PHYSICAL REVIEW LETTERS LA English DT Article ID CHARMONIUM AB We search for the factorization-suppressed decays B ->chi K-c0((*)) and B ->chi K-c2((*)), with chi(c0) and chi(c2) decaying into J/psi gamma, using a sample of 124x10(6) B (B) over bar events collected with the BABAR detector at the PEP-II storage ring of the Stanford Linear Accelerator Center. We find no significant signal and set upper bounds for the branching fractions. C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. Univ Autonoma Barcelona, E-08193 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Univ Bari, 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. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. 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. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, 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. Univ Milan, 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. Univ Naples Federico II, 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. 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 & Hautes Energies, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Scuola Normale Super Pisa, Dipartimento Fis, I-56127 Pisa, Italy. Univ Pisa, 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. Univ Roma La Sapienza, 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. Univ Valencia, E-46100 Valencia, Spain. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Basilicata, I-85100 Potenza, Italy. RP Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France. RI crosetti, nanni/H-3040-2011; Kravchenko, Evgeniy/F-5457-2015; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; de Groot, Nicolo/A-2675-2009; Bellini, Fabio/D-1055-2009; Patrignani, Claudia/C-5223-2009; Lo Vetere, Maurizio/J-5049-2012; Negrini, Matteo/C-8906-2014; Forti, Francesco/H-3035-2011; Monge, Maria Roberta/G-9127-2012; Neri, Nicola/G-3991-2012; Lista, Luca/C-5719-2008; Rotondo, Marcello/I-6043-2012; Saeed, Mohammad Alam/J-7455-2012; de Sangro, Riccardo/J-2901-2012; Martinez Vidal, F*/L-7563-2014; Di Lodovico, Francesca/L-9109-2016; Cavallo, Nicola/F-8913-2012; Kolomensky, Yury/I-3510-2015; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Lusiani, Alberto/A-3329-2016; Lusiani, Alberto/N-2976-2015; Grancagnolo, Sergio/J-3957-2015; Morandin, Mauro/A-3308-2016; Della Ricca, Giuseppe/B-6826-2013; Mir, Lluisa-Maria/G-7212-2015; Sarti, Alessio/I-2833-2012 OI Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Bellini, Fabio/0000-0002-2936-660X; Patrignani, Claudia/0000-0002-5882-1747; Lo Vetere, Maurizio/0000-0002-6520-4480; Negrini, Matteo/0000-0003-0101-6963; Forti, Francesco/0000-0001-6535-7965; Monge, Maria Roberta/0000-0003-1633-3195; Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Saeed, Mohammad Alam/0000-0002-3529-9255; de Sangro, Riccardo/0000-0002-3808-5455; Martinez Vidal, F*/0000-0001-6841-6035; Di Lodovico, Francesca/0000-0003-3952-2175; Kolomensky, Yury/0000-0001-8496-9975; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Grancagnolo, Sergio/0000-0001-8490-8304; Morandin, Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982; Mir, Lluisa-Maria/0000-0002-4276-715X; Sarti, Alessio/0000-0001-5419-7951 NR 12 TC 9 Z9 9 U1 0 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 6 PY 2005 VL 94 IS 17 AR 171801 DI 10.1103/PhysRevLett.94.171801 PG 7 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200011 PM 15904279 ER PT J AU Beacom, JF Bell, NF Bertone, G AF Beacom, JF Bell, NF Bertone, G TI Gamma-ray constraint on galactic positron production by MeV dark matter SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANNIHILATION RADIATION; LINE EMISSION; GALAXY; SUPERNOVAE AB The Galactic positrons, as observed by their annihilation gamma-ray line at 0.511 MeV, are difficult to account for with astrophysical sources. It has been proposed that they are produced instead by dark matter annihilation or decay in the inner Galactic halo. To avoid other constraints, these processes are required to occur "invisibly," such that the eventual positron annihilation is the only detectable signal. However, electromagnetic radiative corrections to these processes inevitably produce real gamma rays ("internal bremsstrahlung"); this emission violates COMPTEL and EGRET constraints unless the dark matter mass is less than about 20 MeV. C1 Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Ohio State Univ, Dept Astron, Columbus, OH 43210 USA. Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, Batavia, IL 60510 USA. CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA. RP Ohio State Univ, Dept Phys, 174 W 18th Ave, Columbus, OH 43210 USA. OI Beacom, John/0000-0002-0005-2631 NR 32 TC 149 Z9 149 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 6 PY 2005 VL 94 IS 17 AR 171301 DI 10.1103/PhysRevLett.94.171301 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200008 PM 15904276 ER PT J AU Delzanno, GL Lapenta, G AF Delzanno, GL Lapenta, G TI Modified Jeans instability for dust grains in a plasma SO PHYSICAL REVIEW LETTERS LA English DT Article AB An investigation of the properties of linear stability is conducted for a system consisting of particles having mass m and charge q, interacting through the gravitational and electrostatic force (Jeans instability). However, in light of recent works showing that dust particles in a plasma can have a Lennard-Jones-like shielding potential, a new set of equations has been derived, where the electrostatic interaction among the dust particles is Lennard-Jones-like instead of Coulomb-like. A new condition for the gravitational instability is derived, showing a broader spectrum of unstable modes with faster growth rates. C1 Politecn Torino, Dipartimento Energet, Burning Plasma Res Grp, I-10129 Turin, Italy. Los Alamos Natl Lab, Div Theoret, Plasma Theory Grp, Los Alamos, NM 87545 USA. RP Delzanno, GL (reprint author), Politecn Torino, Dipartimento Energet, Burning Plasma Res Grp, I-10129 Turin, Italy. OI Lapenta, Giovanni/0000-0002-3123-4024 NR 9 TC 16 Z9 16 U1 2 U2 6 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 6 PY 2005 VL 94 IS 17 AR 175005 DI 10.1103/PhysRevLett.94.175005 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200039 PM 15904307 ER PT J AU Hagiwara, M Regnault, LP Zheludev, A Stunault, A Metoki, N Suzuki, T Suga, S Kakurai, K Koike, Y Vorderwisch, P Chung, JH AF Hagiwara, M Regnault, LP Zheludev, A Stunault, A Metoki, N Suzuki, T Suga, S Kakurai, K Koike, Y Vorderwisch, P Chung, JH TI Spin excitations in an anisotropic bond-alternating quantum S=1 chain in a magnetic field: Contrast to haldane spin chains SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANTI-FERROMAGNET; ANTIFERROMAGNET; DYNAMICS; STATE AB Inelastic neutron scattering experiments on the S=1 quasi-one-dimensional bond-alternating antiferromagnet Ni(C9D24N4)(NO2)ClO4 have been performed under magnetic fields below and above a critical field H-c at which the energy gap closes. Normal field dependence of Zeeman splitting of the excited triplet modes below H-c has been observed, but the highest mode is unusually small and smears out with increasing field. This can be explained by an interaction with a low-lying two magnon continuum at q(parallel to)=pi that is present in dimerized chains but absent in uniform ones. Above H-c, we find only one excited mode, in stark contrast with three massive excitations previously observed in the structurally similar Haldane-gap material NDMAP [A. Zheludev , Phys. Rev. B 68, 134438 (2003)]. C1 RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. CEA Grenoble, DRFMC, SPSMS, MDN, F-38054 Grenoble, France. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. JAERI, Adv Sci Res Ctr, Ibaraki 3191195, Japan. Osaka Univ, Dept Appl Phys, Osaka 5650871, Japan. BENSC, Hahn Meitner Inst, D-14109 Berlin, Germany. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA. RP Hagiwara, M (reprint author), Osaka Univ, KYOKUGEN, 1-3 Machikaneyama, Osaka 5608531, Japan. NR 28 TC 34 Z9 34 U1 2 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 6 PY 2005 VL 94 IS 17 AR 177202 DI 10.1103/PhysRevLett.94.177202 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200063 PM 15904331 ER PT J AU He, FZ Wells, BO Shapiro, SM AF He, FZ Wells, BO Shapiro, SM TI Strain phase diagram and domain orientation in SrTiO3 thin films SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRANSITION; TEMPERATURE; FERROELECTRICITY AB SrTiO3 thin films were used as a model system to study the effects of strain and epitaxial constraint on structural phase transitions of perovskite films. The basic phenomena revealed will apply to a variety of important structural transitions including the ferroelectric transition. Highly strained SrTiO3 films were grown on different substrates, providing both compressive and tensile strain. The measured strain-temperature phase diagram is qualitatively consistent with theory; however, the increase in the phase transition temperature is much larger than predicted. Because of the epitaxial strain and substrate clamping, the SrTiO3 lattice is tetragonal at all temperatures. The phase transitions involve only changes in internal symmetry. The low temperature phase under tensile strain has a unique structure with orthorhombic Cmcm space group but a tetragonal lattice, an interesting consequence of epitaxial constraint. C1 Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP He, FZ (reprint author), Univ Connecticut, Dept Phys, Storrs, CT 06269 USA. RI He, Feizhou/G-8493-2015 OI He, Feizhou/0000-0002-3125-1406 NR 16 TC 57 Z9 57 U1 3 U2 29 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 6 PY 2005 VL 94 IS 17 AR 176101 DI 10.1103/PhysRevLett.94.176101 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200045 PM 15904313 ER PT J AU Kline, JL Montgomery, DS Bezzerides, B Cobble, JA DuBois, DF Johnson, RP Rose, HA Yin, L Vu, HX AF Kline, JL Montgomery, DS Bezzerides, B Cobble, JA DuBois, DF Johnson, RP Rose, HA Yin, L Vu, HX TI Observation of a transition from fluid to kinetic nonlinearities for Langmuir waves driven by stimulated Raman backscatter SO PHYSICAL REVIEW LETTERS LA English DT Article ID HOT-SPOT EXPERIMENTS; DECAY INSTABILITY; PARAMETRIC-INSTABILITIES; THOMSON SCATTERING; FREQUENCY-SHIFT; PLASMA-WAVES; TRIDENT; MODEL AB Thomson scattering is used to measure Langmuir waves (LW) driven by stimulated Raman scattering (SRS) in a diffraction limited laser focal spot. For SRS at wave numbers kλ(D)&LSIM; 0.29, where k is the LW number and λ(D) is the Debye length, multiple waves are detected and are attributed to the Langmuir decay instability (LDI) driven by the primary LW. At kλ(D)&GSIM; 0.29, a single wave, frequency-broadened spectrum is observed. The transition from the fluid to the kinetic regime is qualitatively consistent with particle-in-cell simulations and crossing of the LDI amplitude threshold above that for LW self-focusing. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Kline, JL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 23 TC 56 Z9 56 U1 0 U2 8 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 6 PY 2005 VL 94 IS 17 AR 175003 DI 10.1103/PhysRevLett.94.175003 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200037 PM 15904305 ER PT J AU Qiu, XY Proffen, T Mitchell, JF Billinge, SJL AF Qiu, XY Proffen, T Mitchell, JF Billinge, SJL TI Orbital correlations in the pseudocubic O and rhombohedral R phases of LaMnO3 SO PHYSICAL REVIEW LETTERS LA English DT Article ID JAHN-TELLER TRANSITION; NEUTRON-DIFFRACTION; CRYSTAL-STRUCTURE; MANGANITES; DISTORTION AB The local and intermediate structure of stoichiometric LaMnO3 has been studied in the pseudocubic and rhombohedral phases at high temperatures (300-1150 K). Neutron powder diffraction data were collected and a combined Rietveld and high real space resolution atomic pair distribution function analysis was carried out. The nature of the Jahn-Teller (JT) transition around 750 K is confirmed to be orbital order to disorder. In the high-temperature orthorhombic (O) and rhombohedral (R) phases, the MnO6 octahedra are still fully distorted locally. More importantly, the intermediate structure suggests the presence of local ordered clusters of diameter similar to 16 A (similar to 4 MnO6 octahedra) implying strong nearest-neighbor JT antiferrodistortive coupling. These clusters persist well above the JT transition temperature even into the high-temperature R phase. C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Qiu, XY (reprint author), Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. RI Lujan Center, LANL/G-4896-2012; Proffen, Thomas/B-3585-2009 OI Proffen, Thomas/0000-0002-1408-6031 NR 21 TC 97 Z9 97 U1 1 U2 29 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 6 PY 2005 VL 94 IS 17 AR 177203 DI 10.1103/PhysRevLett.94.177203 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200064 PM 15904332 ER PT J AU Sood, V Redner, S AF Sood, V Redner, S TI Voter model on heterogeneous graphs SO PHYSICAL REVIEW LETTERS LA English DT Article ID SMALL-WORLD NETWORKS AB We study the voter model on heterogeneous graphs. We exploit the nonconservation of the magnetization to characterize how consensus is reached. For a network of N nodes with an arbitrary but uncorrelated degree distribution, the mean time to reach consensus T-N scales as Nμ(2)(1)/μ(2), where μ(k) is the kth moment of the degree distribution. For a power-law degree distribution n(k)&SIM; k(-ν), T-N thus scales as N for ν> 3, as N/lnN for ν=3, as N(2ν-4)/(ν-1) for 2<ν< 3, as (lnN)(2) for ν=2, and as O(1) for ν< 2. These results agree with simulation data for networks with both uncorrelated and correlated node degrees. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Sood, V (reprint author), Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. EM vsood@bu.edu; redner@cnls.lanl.gov NR 23 TC 235 Z9 242 U1 1 U2 21 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 6 PY 2005 VL 94 IS 17 AR 178701 DI 10.1103/PhysRevLett.94.178701 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200075 PM 15904343 ER PT J AU van Duijn, J Kim, KH Hur, N Adroja, D Adams, MA Huang, QZ Jaime, M Cheong, SW Broholm, C Perring, TG AF van Duijn, J Kim, KH Hur, N Adroja, D Adams, MA Huang, QZ Jaime, M Cheong, SW Broholm, C Perring, TG TI Inhomogeneous level splitting in Pr2-xBixRu2O7 SO PHYSICAL REVIEW LETTERS LA English DT Article ID RARE-EARTH; CRYSTALLINE AB We report that Bi doping drives Pr2-xBixRu2O7 from an antiferromagnetic insulator (x=0) to a metallic paramagnet (x&AP; 1) with a broad low T maximum in C/T. Neutron scattering reveals local low energy spin excitations ((h) over bar ω&AP; 1 meV) with a spectrum that is unaffected by heating to k(B)T>(h) over bar ω. We show that a continuous distribution of splittings of the non-Kramers Pr3+ ground-state doublet such as might result from various types of lattice strain can account for all the data. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England. Los Alamos Natl Lab, MST NHMFL, Los Alamos, NM 87544 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Seoul Natl Univ, CSCMR, Seoul 151747, South Korea. Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea. RP van Duijn, J (reprint author), Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RI Broholm, Collin/E-8228-2011; Hur, Namjung/G-3752-2013; Jaime, Marcelo/F-3791-2015; OI Broholm, Collin/0000-0002-1569-9892; Jaime, Marcelo/0000-0001-5360-5220; van Duijn, Joost/0000-0003-2283-6477 NR 22 TC 11 Z9 11 U1 0 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 6 PY 2005 VL 94 IS 17 AR 177201 DI 10.1103/PhysRevLett.94.177201 PG 4 WC Physics, Multidisciplinary SC Physics GA 923TM UT WOS:000228932200062 PM 15904330 ER PT J AU Nilsson, A Wernet, P Nordlund, D Bergmann, U Cavalleri, M Odelius, M Ogasawara, H Naslund, LA Hirsch, TK Ojamae, L Glatzel, P Pettersson, LGM AF Nilsson, A Wernet, P Nordlund, D Bergmann, U Cavalleri, M Odelius, M Ogasawara, H Naslund, LA Hirsch, TK Ojamae, L Glatzel, P Pettersson, LGM TI Comment on "Energetics of hydrogen bond network: Rearrangements in liquid water" SO SCIENCE LA English DT Editorial Material ID RAY RAMAN-SCATTERING; SPECTRA C1 Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. Stockholm Univ, AlbaNova Univ Ctr, S-10691 Stockholm, Sweden. Berliner Elektronenspeicherring Gesell Synchrotro, D-12489 Berlin, Germany. AlbaNova Univ Ctr, Fysikum, Stockholm, Sweden. Linkoping Univ, Dept Chem, IFM, S-58183 Linkoping, Sweden. European Synchrotron Radiat Facil, Swiss Norwegian Beamlines, F-38043 Grenoble, France. RP Nilsson, A (reprint author), Stanford Synchrotron Radiat Lab, POB 20450, Stanford, CA 94309 USA. EM nilsson@slac.stanford.edu RI 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; Ojamae, Lars/C-4974-2015; Ogasawara, Hirohito/D-2105-2009 OI 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; Ogasawara, Hirohito/0000-0001-5338-1079 NR 9 TC 82 Z9 82 U1 3 U2 36 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 6 PY 2005 VL 308 IS 5723 BP 793A EP 793A DI 10.1126/science.1108864 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 924NW UT WOS:000228986500021 ER PT J AU Foster, I AF Foster, I TI Service-oriented science SO SCIENCE LA English DT Article ID SYSTEM; WORLD; WEB AB New information architectures enable new approaches to publishing and accessing valuable data and programs. So-called service-oriented architectures define standard interfaces and protocols that allow developers to encapsulate information tools as services that clients can access without knowledge of, or control over, their internal workings. Thus, tools formerly accessible only to the specialist can be made available to all; previously manual data-processing and analysis tasks can be automated by having services access services. Such service-oriented approaches to science are already being applied successfully, in some cases at substantial scales, but much more effort is required before these approaches are applied routinely across many disciplines. Grid technologies can accelerate the development and adoption of service-oriented science by enabling a separation of concerns between discipline-specific content and domain-independent software and hardware infrastructure. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA. RP Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM foster@mcs.anl.gov RI Wright, Dawn/A-4518-2011 OI Wright, Dawn/0000-0002-2997-7611 NR 24 TC 209 Z9 227 U1 1 U2 16 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD MAY 6 PY 2005 VL 308 IS 5723 BP 814 EP 817 DI 10.1126/science.1110411 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 924NW UT WOS:000228986500037 PM 15879208 ER PT J AU Wild, M Gilgen, H Roesch, A Ohmura, A Long, CN Dutton, EG Forgan, B Kallis, A Russak, V Tsvetkov, A AF Wild, M Gilgen, H Roesch, A Ohmura, A Long, CN Dutton, EG Forgan, B Kallis, A Russak, V Tsvetkov, A TI From dimming to brightening: Decadal changes in solar radiation at Earth's surface SO SCIENCE LA English DT Article ID ENERGY-BALANCE ARCHIVE; CLIMATE AB Variations in solar radiation incident at Earth's surface profoundly affect the human and terrestrial environment. A decline in solar radiation at land surfaces has become apparent in many observational records up to 1990, a phenomenon known as global dimming. Newly available surface observations from 1990 to the present, primarily from the Northern Hemisphere, show that the dimming did not persist into the 1990s. Instead, a widespread brightening has been observed since the late 1980s. This reversal is reconcilable with changes in cloudiness and atmospheric transmission and may substantially affect surface climate, the hydrological cycle, glaciers, and ecosystems. C1 Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, CH-8057 Zurich, Switzerland. Pacific NW Natl Lab, Richland, WA 99352 USA. NOAA, Climate Monitoring & Diagnost Lab, Boulder, CO 80305 USA. Bur Meteorol, Melbourne, Vic 3001, Australia. Estonian Meteorol & Hydrol Inst, EE-61602 Toravere, Estonia. Tartu Astrophys Observ, EE-61602 Toravere, Estonia. World Radiat Data Ctr, AI Voeikov Main Geophys Observ, St Petersburg 194021, Russia. RP Wild, M (reprint author), Swiss Fed Inst Technol, Inst Atmospher & Climate Sci, Winterthurerstr 190, CH-8057 Zurich, Switzerland. EM martin.witd@env.ethz.ch RI Wild, Martin/J-8977-2012; Osborne, Nicholas/N-4915-2015 OI Osborne, Nicholas/0000-0002-6700-2284 NR 24 TC 588 Z9 663 U1 13 U2 138 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 6 PY 2005 VL 308 IS 5723 BP 847 EP 850 DI 10.1126/science.1103215 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 924NW UT WOS:000228986500046 PM 15879214 ER PT J AU Malmon, DV Reneau, SL Dunne, T Katzman, D Drakos, PG AF Malmon, DV Reneau, SL Dunne, T Katzman, D Drakos, PG TI Influence of sediment storage on downstream delivery of contaminated sediment SO WATER RESOURCES RESEARCH LA English DT Article ID RIVER; TRANSPORT; CHANNEL; VALLEY; BUDGET; FLOOD AB [1] Sediment storage in alluvial valleys can strongly modulate the downstream migration of sediment and associated contaminants through landscapes. Traditional methods for routing contaminated sediment through valleys focus on in-channel sediment transport but ignore the influence of sediment exchanges with temporary sediment storage reservoirs outside the channel, such as floodplains. In theory, probabilistic analysis of particle trajectories through valleys offers a useful strategy for quantifying the influence of sediment storage on the downstream movement of contaminated sediment. This paper describes a field application and test of this theory, using Cs-137 as a sediment tracer over 45 years ( 1952 - 1997), downstream of a historical effluent outfall at the Los Alamos National Laboratory (LANL), New Mexico. The theory is parameterized using a sediment budget based on field data and an estimate of the Cs-137 release history at the upstream boundary. The uncalibrated model reasonably replicates the approximate magnitude and spatial distribution of channel- and floodplain-stored Cs-137 measured in an independent field study. Model runs quantify the role of sediment storage in the long-term migration of a pulse of contaminated sediment, quantify the downstream impact of upstream mitigation, and mathematically decompose the future Cs-137 flux near the LANL property boundary to evaluate the relative contributions of various upstream contaminant sources. The fate of many sediment-bound contaminants is determined by the relative timescales of contaminant degradation and particle residence time in different types of sedimentary environments. The theory provides a viable approach for quantifying the long-term movement of contaminated sediment through valleys. C1 Univ Calif Santa Barbara, Dept Geol Sci, Santa Barbara, CA 93106 USA. Los Alamos Natl Lab, Environm Geol & Spatial Anal Grp, Los Alamos, NM 87545 USA. Univ Calif Santa Barbara, Donald Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA. Glorieta Geosci Inc, Santa Fe, NM 87502 USA. RP Malmon, DV (reprint author), US Geol Survey, 345 Middlefield Rd,MS 973, Menlo Pk, CA 94025 USA. EM dmalmon@usgs.gov RI Dunne, Thomas/B-6374-2014 OI Dunne, Thomas/0000-0002-5281-6517 NR 23 TC 17 Z9 17 U1 0 U2 2 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 6 PY 2005 VL 41 IS 5 AR W05008 DI 10.1029/2004WR003288 PG 17 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA 926VB UT WOS:000229150400001 ER PT J AU Jacob, GC Starbuck, JM Fellers, JF Simunovic, S Boeman, RG AF Jacob, GC Starbuck, JM Fellers, JF Simunovic, S Boeman, RG TI The effect of loading rate on the fracture toughness of fiber reinforced polymer composites SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article DE polymer composite materials; strain rate; fracture toughness ID II INTERLAMINAR FRACTURE; IMPACT FRACTURE; GRAPHITE-EPOXY; STRAIN-RATE; PEEK; TEMPERATURE; BEHAVIOR; MECHANISMS; FAILURE AB This article is a detailed review of the strain rate dependence of fracture toughness properties in polymer composite materials. An attempt is made to draw together all the strain rate studies done in the past and to elucidate the reasons given by the authors of the reviewed papers for the trends resulting from their studies to better understand the strain rate effects on the fracture toughness of fiber reinforced polymer composite materials. (c) 2005 Wiley Periodicals, Inc. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Polymer Matrix Composites Grp, Div Met & Ceram, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Comp Sci & Math Div, Computat Mat Sci, Oak Ridge, TN 37831 USA. RP Jacob, GC (reprint author), Univ Tennessee, Dept Mat Sci & Engn, 434 Dougherty Engn, Knoxville, TN 37996 USA. EM gjacob@utk.edu RI Starbuck, James/E-1442-2017 OI Starbuck, James/0000-0002-3814-9156 NR 36 TC 12 Z9 12 U1 3 U2 14 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD MAY 5 PY 2005 VL 96 IS 3 BP 899 EP 904 DI 10.1002/app.21535 PG 6 WC Polymer Science SC Polymer Science GA 908XM UT WOS:000227823500040 ER PT J AU Orme, CJ Stewart, FF AF Orme, CJ Stewart, FF TI Mixed gas hydrogen sulfide permeability and separation using supported polyphosphazene membranes SO JOURNAL OF MEMBRANE SCIENCE LA English DT Article DE gas separation; polyphosphazenes; hydrogen sulfide; gas membranes; supported films; mixed gas permeability ID PERMEATION; POLY(DIMETHYLSILOXANE); DIFFUSION AB Three phosphazene polymers were characterized for permeability using a suite of pure gases, including H2S where high permeabilities were measured with respect to the other gases in the study. Mixed gas selectivities were determined and compared to the ideal gas selectivities for the H2S/CH4, CO2/CH4, and Ar/CH4 gas pairs. The three phosphazenes represent a set of membrane materials differing by their polarities. Description of the polarity of each was performed using Hansen solubility parameters derived from group contributions for each chemical structure. A good correlation was observed between the polar Hansen parameter (delta(p)) and the gas permeabilities of both CO2 and H2S. Furthermore, permeant gas critical temperatures were also found to correlate with permeability, with the exception of He and H-2. A comparison of the mixed gas permeabilities with the corresponding pure gas data revealed good agreement in the data. Most surprisingly, permeabilities and separation factors were observed to increase with decreasing glass transition temperature (T-g) for the H2S/CH4 and CO2/CH4 gas pairs reaching a maximum of P-H2s = 1103 x 10(-10) cm(3) (1103 Barters) with and alpha(H2S/CH4) = 78.8 as derived from a mixed gas experiment. (c) 2005 Elsevier B.V. All rights reserved. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Stewart, FF (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM FSF@INEL.GOV NR 15 TC 32 Z9 32 U1 2 U2 14 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0376-7388 J9 J MEMBRANE SCI JI J. Membr. Sci. PD MAY 5 PY 2005 VL 253 IS 1-2 BP 243 EP 249 DI 10.1016/j.memsci.2004.12.034 PG 7 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA 922PU UT WOS:000228851000023 ER PT J AU Jochnowitz, EB Zhang, X Nimlos, MR Varner, ME Stanton, JF Ellison, GB AF Jochnowitz, EB Zhang, X Nimlos, MR Varner, ME Stanton, JF Ellison, GB TI Propargyl radical: Ab initio anharmonic modes and the polarized infrared absorption spectra of matrix-isolated HCCCH2 SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID BOND-DISSOCIATION ENERGIES; GAS-PHASE; VIBRATIONAL FREQUENCIES; MICROWAVE SPECTROSCOPY; ARGON MATRICES; ALLYL RADICALS; GROUND-STATE; MOLECULES; STRETCH; ALLENE AB The propargyl radical has twelve fundamental vibrational modes, Gamma(vib)(HCCCH2) = 5a(1) circle plus 3b(1) circle plus 4b(2), and nine have been detected in a cryogenic matrix. Ab initio coupled-cluster anharmonic force field calculations were used to help guide some of the assignments. The experimental HC = C - CH2 matrix frequencies (cm(-1)) and polarizations are a(1) modes-3308.5 +/- 0.5, 3028.3 +/- 0.6, 1935.4 +/- 0.4, 1440.4 +/- 0.5, 1061.6 +/- 0.8; b(1) modes-686.6 +/- 0.4, 483.6 +/- 0.5; b(2) modes-1016.7 +/- 0.4, 620 +/- 2. We recommend a complete set of gas-phase vibrational frequencies for the propargyl radical, HC = C - CH2 (X) over tilde B-2(1). From an analysis of the vibrational spectra, the small electric dipole moment, mu(D)(HCCCH2) = 0.150 D, and the large resonance energy (HCCCH2), roughly 11 kcal mol(-1), we conclude that propargyl is a completely delocalized hydrocarbon radical and is best written as HC = C - CH2. C1 Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. Univ Texas, Dept Chem, Inst Theoret Chem, Austin, TX 78712 USA. RP Nimlos, MR (reprint author), Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA. EM mark_nimlos@nrel.gov; jfstanton@mail.utexas.edu; barney@jila.colorado.edu NR 52 TC 43 Z9 43 U1 2 U2 18 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 5 PY 2005 VL 109 IS 17 BP 3812 EP 3821 DI 10.1021/jp040719j PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 922OM UT WOS:000228847300008 PM 16833697 ER PT J AU Estupinan, EG Klippenstein, SJ Taatjes, CA AF Estupinan, EG Klippenstein, SJ Taatjes, CA TI Measurements and modeling of HO2 formation in the reactions of n-C3H7 and i-C3H7 radicals with O-2 SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Review ID PRODUCT FORMATION; GAS-PHASE; MOLECULAR-OXYGEN; ALKYL RADICALS; REACTION-MECHANISM; REACTION-KINETICS; DIODE-LASER; PLUS O-2; ABSORPTION-SPECTROSCOPY; ETHYLPEROXY RADICALS AB The formation of HO2 in the reactions Of C2H5, n-C3H7, and i-C3H7 radicals with O-2 is investigated using the technique of laser photolysis/long-path frequency-modulation spectroscopy. The alkyl radicals are formed by 266 nm photolysis of alkyl iodides. The formation of HO2 from the subsequent reaction of the alkyl radicals with O-2 is followed by infrared frequency-modulation spectroscopy. The concentration of I atoms is simultaneously monitored by direct absorption of a second laser probe on the spin-orbit transition. The measured profiles are compared to a kinetic model taken from time-resolved master-equation results based on previously published ab initio characterizations of the relevant stationary points on the potential-energy surface. The ab initio energies are adjusted to produce agreement with the present experimental data and with available literature studies. The isomer specificity of the present results enables refinement of the model for i-C3H7 + O-2 and improved agreement with experimental measurements of HO2 production in propane oxidation. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Taatjes, CA (reprint author), Sandia Natl Labs, Combust Res Facil, Mail Stop 9055, Livermore, CA 94551 USA. EM cataatj@sandia.gov OI Klippenstein, Stephen/0000-0001-6297-9187 NR 104 TC 32 Z9 32 U1 1 U2 13 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 5 PY 2005 VL 109 IS 17 BP 8374 EP 8387 DI 10.1021/jp046514s PG 14 WC Chemistry, Physical SC Chemistry GA 922OO UT WOS:000228847500014 PM 16851983 ER PT J AU Fockenberg, C Weston, RE Muckerman, JT AF Fockenberg, C Weston, RE Muckerman, JT TI Product study of the reaction of CH3 with OH radicals at low pressures and temperatures of 300 and 612 K SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID UNIMOLECULAR REACTION SYSTEMS; COUPLED CHEMICAL-REACTIONS; TRANSITION-STATE THEORY; EVALUATED KINETIC DATA; RATE COEFFICIENTS; RATE-CONSTANT; GAS-PHASE; STOCHASTIC SIMULATION; METHYL RADICALS; MULTIPLE-WELL AB The product distribution for the title reaction was studied using our time-of-flight mass spectrometer (TOFMS) connected to a tubular flow reactor. The methyl and hydroxyl radicals were produced by an excimer laser pulse ( λ= 193 nm) photolyzing acetone and nitrous oxide in the presence of excess water or hydrogen. Helium was used as the bath gas; the total density was held constant at 1.2 x 1011 cm(-3). At 300 K the observations were consistent with singlet methylene ((CH2)-C-1) and water as the main product channel with a small contribution of methanol. In contrast, at about 610 K three channels-formaldehyde isomers and methanol in addition to (CH2)-C-1 + H2O-are formed with similar yields. When acetone-d6 was used, the production of both CHDO and CD2O was observed, indicating that two different formaldehyde-producing channels are operating simultaneously. These experimental results are compared with RRKM and master equation calculations on the basis of the properties of the methanol potential energy surface from a recent ab initio study. C1 Brookhaven Natl Lab, Dept Chem 555A, Upton, NY 11973 USA. RP Weston, RE (reprint author), Brookhaven Natl Lab, Dept Chem 555A, POB 5000, Upton, NY 11973 USA. RI Muckerman, James/D-8752-2013 NR 63 TC 9 Z9 9 U1 0 U2 4 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 5 PY 2005 VL 109 IS 17 BP 8415 EP 8427 DI 10.1021/jp045792o PG 13 WC Chemistry, Physical SC Chemistry GA 922OO UT WOS:000228847500019 PM 16851988 ER PT J AU Banerjee, S Hemraj-Benny, T Sambasivan, S Fischer, DA Misewich, JA Wong, SS AF Banerjee, S Hemraj-Benny, T Sambasivan, S Fischer, DA Misewich, JA Wong, SS TI Near-edge X-ray absorption fine structure investigations of order in carbon nanotube-based systems SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID RAMAN-SPECTROSCOPY; ELECTRONIC-STRUCTURE; FIELD-EMISSION; FIBERS; GROWTH; NEXAFS; FABRICATION; INTEGRATION; CHEMISTRY; ALIGNMENT AB Probing order in nanotube systems is of fundamental importance in devising applications of these tubes in field emission applications as well as for components of composite materials. We use near-edge X-ray absorption fine structure (NEXAFS) spectroscopy to qualitatively and quantitatively study the degree of order and alignment in a wide range of carbon nanotube-based systems, including single-walled carbon nanotube (SWNT) powder, SWNT films, and aligned multiwalled carbon nanotubes. The results are compared to analogous data obtained from a highly ordered pyrolytic graphite (HOPG) sample. C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. NIST, Mat Sci & Engn Lab, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Div Mat Sci, Upton, NY 11973 USA. RP Wong, SS (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. EM sswong@notes.cc.sunysb.edu NR 40 TC 54 Z9 55 U1 1 U2 13 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 5 PY 2005 VL 109 IS 17 BP 8489 EP 8495 DI 10.1021/jp047408t PG 7 WC Chemistry, Physical SC Chemistry GA 922OO UT WOS:000228847500028 PM 16851997 ER PT J AU Kim, ZH Liu, B Leone, SR AF Kim, ZH Liu, B Leone, SR TI Nanometer-scale optical imaging of epitaxially grown GaN and InN islands using apertureless near-field microscopy SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID RAMAN-SPECTROSCOPY; CONTRAST; RESOLUTION; ENHANCEMENT; SCATTERING; PROBE AB Nanometer-scale chemical imaging of epitaxially grown gallium nitride (GaN) and indium nitride (InN) islands is performed using scattering-type apertureless near-field scanning optical microscopy (ANSOM). The scattering of 633 nm laser radiation is modulated by an oscillating metallic probe, and the scattered radiation is detected by homodyne amplification, followed by high-harmonic demodulation, yielding optical near-field scattering maps with a spatial resolution better than 30 nm. The image contrast between InN and GaN, and the tip-sample distance dependence, can be qualitatively explained by a simple dipole-coupling model. The ANSOM images of InN and GaN also show structures that are absent in the topographic counterpart, and these substructures are explained by the variations of the local dielectric environment of InN and GaN. C1 Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Leone, SR (reprint author), Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. EM srl@uclink.berkeley.edu RI Kim, Zee Hwan/A-9273-2010 NR 32 TC 26 Z9 26 U1 2 U2 6 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 5 PY 2005 VL 109 IS 17 BP 8503 EP 8508 DI 10.1021/jp047425i PG 6 WC Chemistry, Physical SC Chemistry GA 922OO UT WOS:000228847500030 PM 16851999 ER PT J AU Lane, TW Saito, MA George, GN Pickering, IJ Prince, RC Morel, FMM AF Lane, TW Saito, MA George, GN Pickering, IJ Prince, RC Morel, FMM TI A cadmium enzyme from a marine diatom SO NATURE LA English DT Editorial Material C1 Sandia Natl Labs, Biosyst Res Dept, Livermore, CA 94551 USA. Woods Hole Oceanog Inst, Marine Chem & Geochem Dept, Woods Hole, MA 02543 USA. Univ Saskatchewan, Dept Geol Sci, Saskatoon, SK S7N 5E2, Canada. ExxonMobile Res & Engn Co, Annandale, NJ 08801 USA. Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA. RP Lane, TW (reprint author), Sandia Natl Labs, Biosyst Res Dept, Livermore, CA 94551 USA. EM mak@whoi.edu RI Morel, Francois/A-8107-2008; George, Graham/E-3290-2013; Pickering, Ingrid/A-4547-2013; OI Lane, Todd/0000-0002-5816-2649 NR 0 TC 291 Z9 306 U1 3 U2 62 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD MAY 5 PY 2005 VL 435 IS 7038 BP 42 EP 42 DI 10.1038/435042a PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 922UL UT WOS:000228864600032 PM 15875011 ER PT J AU Berciu, M Rappoport, TG Janko, B AF Berciu, M Rappoport, TG Janko, B TI Manipulating spin and charge in magnetic semiconductors using superconducting vortices SO NATURE LA English DT Article ID QUANTIZED HALL CONDUCTANCE; ELECTRONS AB The continuous need for miniaturization and increase in device speed(1) drives the electronics industry to explore new avenues of information processing. One possibility is to use electron spin to store, manipulate and carry information(2). All such 'spintronics' applications are faced with formidable challenges in finding fast and efficient ways to create, transport, detect, control and manipulate spin textures and currents. Here we show how most of these operations can be performed in a relatively simple manner in a hybrid system consisting of a superconducting film and a paramagnetic diluted magnetic semiconductor (DMS) quantum well. Our proposal is based on the observation that the inhomogeneous magnetic fields of the superconducting film create local spin and charge textures in the DMS quantum well, leading to a variety of effects such as Bloch oscillations and an unusual quantum Hall effect. We exploit recent progress in manipulating magnetic flux bundles ( vortices) in superconductors(3,4) and show how these can create, manipulate and control the spin textures in DMSs. C1 Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Janko, B (reprint author), Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. EM bjanko@nd.edu RI Rappoport, Tatiana/J-8626-2014; Berciu, Mona/O-4889-2014; OI Rappoport, Tatiana/0000-0002-1878-5956 NR 25 TC 53 Z9 54 U1 1 U2 17 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 5 PY 2005 VL 435 IS 7038 BP 71 EP 75 DI 10.1038/nature03559 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 922UL UT WOS:000228864600038 PM 15875016 ER PT J AU Nijjar, T Bassett, E Garbe, J Takenaka, Y Stampfer, MR Gilley, D Yaswen, P AF Nijjar, T Bassett, E Garbe, J Takenaka, Y Stampfer, MR Gilley, D Yaswen, P TI Accumulation and altered localization of telomere-associated protein TRF2 in immortally transformed and tumor-derived human breast cells SO ONCOGENE LA English DT Article DE telomeres; senescence; immortalization ID MAMMARY EPITHELIAL-CELLS; MAMMALIAN TELOMERES; IMMORTALIZATION; SENESCENCE; EXPRESSION; P53; CONVERSION; ARREST; CANCER; LINES AB We have used cultured human mammary epithelial cells (HMEC) and breast tumor-derived lines to gain information on defects that occur during breast cancer progression. HMEC immortalized by a variety of agents ( the chemical carcinogen benzo( a) pyrene, oncogenes c-myc and ZNF217, and/or dominant negative p53 genetic suppressor element GSE22) displayed marked upregulation (10-15 fold) of the telomere-binding protein, TRF2. Upregulation of TRF2 protein was apparently due to differences in post-transcriptional regulation, as mRNA levels remained comparable infinite lifespan and immortal HMEC. TRF2 protein was not upregulated by the oncogenic agents alone in the absence of immortalization, nor by expression of exogenously introduced hTERT genes. We found TRF2 levels to be at least twofold higher than in control cells in 11/15 breast tumor cell lines, suggesting that elevated TRF2 levels are a frequent occurrence during the transformation of breast tumor cells in vivo. The dispersed distribution of TRF2 throughout the nuclei in some immortalized and tumor-derived cells indicated that not all the TRF2 was associated with telomeres in these cells. The process responsible for accumulation of TRF2 in immortalized HMEC and breast tumor-derived cell lines may promote tumorigenesis by contributing to the cells' ability to maintain an indefinite lifespan. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Indiana Univ, Sch Med, Dept Med & Mol Genet, Indianapolis, IN 46202 USA. RP Gilley, D (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Bldg 70A1118,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM dpgilley@iupui.edu; P_Yaswen@lbl.gov FU NCI NIH HHS [CA-108480, CA-24844] NR 29 TC 21 Z9 25 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0950-9232 J9 ONCOGENE JI Oncogene PD MAY 5 PY 2005 VL 24 IS 20 BP 3369 EP 3376 DI 10.1038/sj.onc.1208482 PG 8 WC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Oncology; Cell Biology; Genetics & Heredity GA 923AU UT WOS:000228881800015 PM 15735711 ER PT J AU Meziani, ZE Melnitchouk, W Chen, JP Choi, S Averett, T Gates, G de Jager, CW Deur, A Gao, H Garibaldi, F Gilman, R Hughes, EW Jiang, X Korsch, W Kramer, K Liyanage, N Slifer, K Yang, JC AF Meziani, ZE Melnitchouk, W Chen, JP Choi, S Averett, T Gates, G de Jager, CW Deur, A Gao, H Garibaldi, F Gilman, R Hughes, EW Jiang, X Korsch, W Kramer, K Liyanage, N Slifer, K Yang, JC TI Higher twists and color polarizabilities in the neutron SO PHYSICS LETTERS B LA English DT Article ID DEEP-INELASTIC-SCATTERING; JAFFE SUM-RULES; SPIN STRUCTURE; QUANTUM CHROMODYNAMICS; POWER CORRECTIONS; QCD; NUCLEONS; Q(2)-DEPENDENCE; APPROXIMATION; DEUTERON AB Color polarizabilities of the neutron are extracted from data on the lowest moment of the spin-dependent g I structure function. New data in the resonance region from Jefferson Lab at Q(2) <= 1 GeV2, in combination with world data at higher Q(2), allow a systematic determination of the 1/Q(2) corrections, and proviI the first constraints on 1/Q(4) corrections. The results suggest that higher-twist effects in the neutron are small, and that quark-hadron duality may be approximately valid, even down to Q(2) similar to 1 GeV2. (c) 2005 Elsevier B.V. All rights reserved. C1 Temple Univ, Philadelphia, PA 19122 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Univ Virginia, Charlottesville, VA 22904 USA. MIT, Cambridge, MA 02139 USA. Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. CALTECH, Pasadena, CA 91125 USA. Univ Kentucky, Lexington, KY 40506 USA. Chungnam Natl Univ, Taejon 305764, South Korea. RP Meziani, ZE (reprint author), Temple Univ, Philadelphia, PA 19122 USA. EM meziani@temple.edu RI Averett, Todd/A-2969-2011; Gao, Haiyan/G-2589-2011 NR 32 TC 37 Z9 37 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 5 PY 2005 VL 613 IS 3-4 BP 148 EP 153 DI 10.1016/j.physletb.2005.03.046 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 923UY UT WOS:000228936000006 ER PT J AU Mannucci, AJ Tsurutani, BT Iijima, BA Komjathy, A Saito, A Gonzalez, WD Guarnieri, FL Kozyra, JU Skoug, R AF Mannucci, AJ Tsurutani, BT Iijima, BA Komjathy, A Saito, A Gonzalez, WD Guarnieri, FL Kozyra, JU Skoug, R TI Dayside global ionospheric response to the major interplanetary events of October 29-30, 2003 "Halloween storms" SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID GREAT MAGNETIC STORM; F-REGION; ELECTRODYNAMICS AB We demonstrate extreme ionospheric response to the large interplanetary electric fields during the "Halloween'' storms that occurred on October 29 and 30, 2003. Within a few ( 2 - 5) hours of the time when the enhanced interplanetary electric field impinged on the magnetopause, dayside total electron content increases of similar to 40% and similar to 250% are observed for the October 29 and 30 events, respectively. During the Oct 30 event, similar to 900% increases in electron content above the CHAMP satellite ( similar to 400 km altitude) were observed at mid-latitudes ( +/- 30 degrees geomagnetic). The geomagnetic storm-time phenomenon of prompt penetration electric fields is a possible contributing cause of these electron content increases, producing dayside ionospheric uplift combined with equatorial plasma diffusion along magnetic field lines to higher latitudes, creating a "daytime super-fountain'' effect. C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. Kyoto Univ, Dept Geophys, Kyoto 6068502, Japan. Inst Pesquisas Espaciais, BR-12201970 Sao Jose Dos Campos, Brazil. Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mannucci, AJ (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA. RI Mannucci, Anthony/A-1349-2007 OI Mannucci, Anthony/0000-0003-2391-8490 NR 19 TC 227 Z9 228 U1 2 U2 10 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 2005 VL 32 IS 12 AR L12S02 DI 10.1029/2004GL021467 PG 4 WC Geosciences, Multidisciplinary SC Geology GA 926TJ UT WOS:000229145500001 ER PT J AU Lim, SHN McCulloch, DG Bilek, MMM McKenzie, DR Russo, SP Barnard, AS Torpy, A AF Lim, SHN McCulloch, DG Bilek, MMM McKenzie, DR Russo, SP Barnard, AS Torpy, A TI Characterization of cathodic arc deposited titanium aluminium nitride films prepared using plasma immersion ion implantation SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; PREFERRED ORIENTATION; AB-INITIO; ELECTRON-MICROSCOPY; INTRINSIC STRESS; TIALN COATINGS; VACUUM-ARC; THIN-FILMS; LOW-ENERGY; TIN AB This paper investigates thin films of titanium aluminium nitride grown using a stoichiometric metallic cathode in a cathodic arc vapour deposition system with plasma immersion ion implantation. The effect of various deposition conditions on the stress, microstructure and composition are evaluated. In general, the films were found to be both titanium and nitrogen rich. The application of voltages of 2 kV and greater was found to dramatically reduce the stress in the films. This stress reduction was found to be less pronounced at lower nitrogen flow rates due to a reduction in nitrogen implantation. The microstructure of the films was found to be cubic and at high voltages exhibited preferred orientation with {200} planes parallel to the surface of the film. We employ density functional theory to calculate the f {100} and {111} surface energies and elastic constants for cubic titanium aluminium nitride. Using these calculated values, we explain this preferred orientation using a model which minimizes both surface energy and bulk strain energy. C1 RMIT Univ, Sch Appl Sci, Melbourne, Vic 3001, Australia. Univ Sydney, Dept Appl Phys, Sch Phys A28, Sydney, NSW 2006, Australia. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Lim, SHN (reprint author), RMIT Univ, Sch Appl Sci, GPO Box 2476V, Melbourne, Vic 3001, Australia. EM sunnie.lim@rmit.edu.au RI Barnard, Amanda/A-7340-2011; Lim, Sunnie/A-2827-2012; McCulloch, Dougal/G-7039-2012; Russo, Salvy/E-5837-2011; OI Barnard, Amanda/0000-0002-4784-2382; Russo, Salvy/0000-0003-3589-3040; McKenzie, David/0000-0002-2476-1301 NR 35 TC 7 Z9 7 U1 0 U2 5 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 4 PY 2005 VL 17 IS 17 BP 2791 EP 2800 DI 10.1088/0953-8984/17/17/029 PG 10 WC Physics, Condensed Matter SC Physics GA 927TA UT WOS:000229222200034 ER PT J AU Sorensen, EM Izumi, HK Vaughey, JT Stern, CL Poeppelmeier, KR AF Sorensen, EM Izumi, HK Vaughey, JT Stern, CL Poeppelmeier, KR TI Ag4V2O6F2: An electrochemically active and high silver density phase SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID VANADIUM-OXIDE BATTERIES; HIGH-ENERGY DENSITY; LITHIUM BATTERIES; DEFIBRILLATOR BATTERIES; CATHODE MATERIALS; CRYSTAL-STRUCTURE; AG2V4O11; REDUCTION; INSERTION; ELECTRODE AB Low-temperature hydrothermal techniques were used to synthesize single crystals of Ag4V2O6F2. This previously unreported oxide fluoride phase was characterized by single-crystal X-ray diffraction and IR spectroscopy and was also evaluated as a primary lithium battery cathode. Crystal data: monoclinic, space group P2(1)/n (No. 14), with a = 8.4034(4) angstrom, b = 10.548(1) angstrom, c = 12.459(1) angstrom, beta = 90.314(2)degrees, and Z = 4. Ag4V2O6F2 (SVOF) exhibits two characteristic regions within the discharge curve, an upper plateau at 3.5 V, and a lower sloped region around 2.3 V from reduction of the vanadium oxide fluoride framework. The material has a nominal capacity of 251 mAh/g, with 148 mAh/g above 3 V. The upper discharge plateau at 3.5 V is nearly 300 mV over the silver reduction potential of the commercial primary battery material, Ag2V4O11 (SVO). C1 Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL USA. RP Poeppelmeier, KR (reprint author), Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. EM krp@northwestern.edu NR 52 TC 57 Z9 58 U1 1 U2 14 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 4 PY 2005 VL 127 IS 17 BP 6347 EP 6352 DI 10.1021/ja050150f PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA 921HQ UT WOS:000228755300046 PM 15853341 ER PT J AU Kidder, MK Britt, PF Zhang, ZT Dai, S Hagaman, EW Chaffee, AL Buchanan, AC AF Kidder, MK Britt, PF Zhang, ZT Dai, S Hagaman, EW Chaffee, AL Buchanan, AC TI Pyrolysis of mesoporous silica-immobilized 1,3-diphenyl propane. Impact of pore confinement and size SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TRANSFER RADICAL POLYMERIZATION; SELF-DIRECTED GROWTH; RESTRICTED MASS-TRANSPORT; SINGLE-SITE; DIFFUSIONAL CONSTRAINTS; SURFACE; CHEMISTRY; CATALYSTS; SBA-15; ADSORPTION AB Mesoporous silicas such as SBA-15 and MCM-41 are being actively investigated for potential applications in catalysis, separations, and synthesis of nanostructured materials. A new method for functionalizing these mesoporous silicas with aromatic phenols is described. The resulting novel hybrid materials possess silyl aryl ether linkages to the silica surface that are thermally stable to ca. 550 degrees C, but can be easily cleaved at room temperature with aqueous base for quantitative recovery of the organic moieties. The materials have been characterized by nitrogen physisorption, FTIR, NMR, and quantitative analysis of surface coverages. The maximum densities of 1,3-diphenylpropane (DPP) molecules that could be grafted to the surface were less than those measured on a nonporous, fumed silica (Cabosil) and were also found to decrease as a function of decreasing pore size (5.6-1.7 nm). This is a consequence of steric congestion in the pores that is magnified at the smaller pore sizes, consistent with parallel studies conducted using a conventional silylating reagent, 1,1,3,3-tetramethyldisilazane. Pyrolysis of the silica-immobilized DPP revealed that pore confinement leads to enhanced rates and altered product selectivity for this free-radical reaction compared with the nonporous silica, and the rates and selectivities also depended on pore size. The influence of confinement is discussed in terms of enhanced encounter frequencies for bimolecular reaction steps and pore surface curvature that alters the accessibility and resultant selectivity for hydrogen transfer steps. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Monash Univ, Sch Chem, Clayton, Vic 3168, Australia. RP Buchanan, AC (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM buchananac@ornl.gov RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 66 TC 36 Z9 37 U1 3 U2 30 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 4 PY 2005 VL 127 IS 17 BP 6353 EP 6360 DI 10.1021/ja050389w PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA 921HQ UT WOS:000228755300047 PM 15853342 ER PT J AU Radisic, D Bowen, KH Dabkowska, I Storoniak, P Rak, J Gutowski, M AF Radisic, D Bowen, KH Dabkowska, I Storoniak, P Rak, J Gutowski, M TI AT base pair anions versus (9-methyl-A)(1-methyl-T) base pair anions SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID THEORETICAL AB-INITIO; NUCLEIC-ACID BASES; EXCESS ELECTRON-ATTACHMENT; DENSITY-FUNCTIONAL THEORY; FREE PROTON-TRANSFER; MOLECULAR-ORBITAL CALCULATIONS; CENTER-DOT-THYMINE; DNA BASES; GUANINE-CYTOSINE; ADENINE-THYMINE AB The anionic base pairs of adenine and thymine, (AT)(-), and 9-methyladenine and 1-methylthymine, (MAMT)(-), have been investigated both theoretically and experimentally in a complementary, synergistic study. Calculations on (AT)(-) found that it had undergone a barrier-free proton transfer (BFPT) similar to that seen in other dimer anion systems and that its structural configuration was neither Watson-Crick (WC) nor Hoogsteen (HS). The vertical detachment energy (VDE) of (AT)(-) was determined by anion photoelectron spectroscopy and found to be in agreement with the VDE value predicted by theory for the BFPT mechanism. An AT pair in DNA is structurally immobilized into the WC configuration, in part, by being bonded to the sugars of the double helix. This circumstance was mimicked by methylating the sites on both A and T where these sugars would have been tied, viz., 9-methyladenine and 1-methylthymine. Calculations found no BFPT in (MAMT)(-) and a resulting (MAMT)(-) configuration that was either HS or WC, with the configurations differing in stability by ca. 2 kcal/mol. The photoelectron spectrum of (MAMT) occurred at a completely different electron binding energy than had (AT)(-). Moreover, the VDE value of (MAMT)(-) was in agreement with that predicted by theory. The configuration of (MAMT)(-) and its lack of electron-induced proton transfer are inter-related. While there may be other pathways for electron-induced DNA alterations, BFPT in the WC/HS configurations of (AT)(-y) is not feasible. C1 Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA. Univ Gdansk, Dept Chem, PL-80952 Gdansk, Poland. Acad Sci Czech Republ, Inst Organ Chem & Biochem, CR-16610 Prague, Czech Republic. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Bowen, KH (reprint author), Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA. EM kbowen@jhu.edu; maciej.gutowski@pnl.gov NR 61 TC 74 Z9 74 U1 0 U2 9 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 4 PY 2005 VL 127 IS 17 BP 6443 EP 6450 DI 10.1021/ja050724g PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA 921HQ UT WOS:000228755300057 PM 15853352 ER PT J AU Meng, YS Ceder, G Grey, CP Yoon, WS Jiang, M Breger, J Shao-Horn, Y AF Meng, YS Ceder, G Grey, CP Yoon, WS Jiang, M Breger, J Shao-Horn, Y TI Cation ordering in layered O3 Li[NixLi1/3-2x/3]Mn2/3-x/3]O-2 (0 <= x <= 1/2) compounds SO CHEMISTRY OF MATERIALS LA English DT Article ID LITHIUM-ION BATTERIES; LINI0.5MN0.5O2 CATHODE MATERIAL; NICKEL MANGANESE OXIDES; X-RAY-ABSORPTION; ELECTRON-DIFFRACTION; STRUCTURAL-CHARACTERIZATION; ELECTROCHEMICAL-BEHAVIOR; INSERTION MATERIAL; PHASE-STABILITY; LOCAL-STRUCTURE AB Three layered compounds, Li[Ni1/2Mn1/2]O-2 (x = 1/2), Li[Li1/9Ni1/3Mn5/9]O-2 (x = 1/3), and Li2MnO3 (x = 0) of the Li[NixLi1/3-2x-/3Mn2/3-x/3]O-2 series were studied by electron diffraction in combination with synchrotron X-ray powder diffraction analyses. In-plane root 3a(hex). x root 3a(hex). ordering was found in all three samples, and a likely model for the occupancies of Li+, Ni2+, and Mn4+ on the sublattices of the transition metal layer was proposed. Perpendicular to the c(hex). axis, the ordered transition metal layers in the layered Li[Ni1/2Mn1/2]O-2 and Li[Li1/9Ni1/3Mn5/9]O-2 crystals could be arranged mostly in the P3(1)12 stacking with some C2/m stacking (such as abab...) abnormally. It is believed that the nickel ions in the lithium layer of these two samples play an important role in the stacking of transition metal layers. Moreover, electron diffraction analyses suggested that individual Li2MnO3 crystals that were obtained at 850 degrees C had at least two different C2/m stacking sequence variants (abab..., caca.... and cbcb...) coexisting along the c(hex). axis, which were associated with the presence of some P3(1)12 stacking abnormally. C1 MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Singapore MIT Alliance, Adv Mat Micro & Nanosyst, Singapore 117576, Singapore. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Div Sci Mat, Upton, NY 11973 USA. MIT, Dept Engn Mech, Cambridge, MA 02139 USA. RP Shao-Horn, Y (reprint author), MIT, Dept Mat Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM shaohorn@mit.edu RI Yoon, Won-Sub/H-2343-2011; Jiang, Meng/C-6781-2012; Meng, Shirley /I-1276-2013 NR 33 TC 162 Z9 165 U1 9 U2 111 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 3 PY 2005 VL 17 IS 9 BP 2386 EP 2394 DI 10.1021/cm047779m PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 921JL UT WOS:000228760300025 ER PT J AU Allada, RK Pless, JD Nenoff, TM Navrotsky, A AF Allada, RK Pless, JD Nenoff, TM Navrotsky, A TI Thermochemistry of hydrotalcite-like phases intercalated with CO32-, NO3-, Cl-, I-, and ReO4- SO CHEMISTRY OF MATERIALS LA English DT Article ID EXCHANGE PROPERTIES; PRECIPITATION; IMPREGNATION; CALORIMETRY; MINERALS; KINETICS; SORPTION; SOLIDS; OXIDES; SYSTEM AB The enthalpies of formation of hydrotalcite-like phases containing Mg and Al and intercalated with NO3-, Cl-, I-, ReO4-, or CO32- were determined using high-temperature oxide melt and room-temperature acid solution calorimetry. The relative stability of phases bearing the various anions was gauged by comparing the enthalpy of formation from the single-cation components (Delta fH(scc)). Trends relating Delta(f)H(scc) to the nature of intercalating anions (halides, NO3-, and CO32-) show small stabilization from the mechanical mixtures of single-cation components. The aim of this study was to relate the enthalpy of formation to the nature of interlayer bonding in hydrotalcite-like compounds (HTLCs) bearing various anions, to uncover trends in the relative aqueous solubilities of these phases. The entropy of formation of these compounds was estimated using an approximation based on third-law entropy measurements for the compound Mg0.74Al0.26(OH)(2)(CO3)(0.13)center dot 0.39H(2)O which were performed in a previous study. This approximation for the third-law entropy was combined with the enthalpy data from our calorimetric measurements performed in this work in order to calculate the standard-state free energy of formation for the HTLCs. The solubility products for the compounds investigated in this study were calculated from these free energies of formation and were used in geochemical calculations. The results of these calculations support our previous hypothesis that carbonate-intercalated HTLCs are less soluble than phases bearing other anions such as nitrates and halides. We suspect that the solubilities of HTLCs bearing anions other than carbonate may correspond to the solubilities of single-cation phases bearing the same anions. 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 Navrotsky, A (reprint author), Univ Calif Davis, Thermochem Facil, Davis, CA 95616 USA. EM anavrotsky@ucdavis.edu NR 25 TC 31 Z9 31 U1 2 U2 22 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 3 PY 2005 VL 17 IS 9 BP 2455 EP 2459 DI 10.1021/cm047813x PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 921JL UT WOS:000228760300033 ER PT J AU Horgan, FG AF Horgan, FG TI Two types of refuge have opposite effects on the size of larval aggregations in a tropical defoliator SO EUROPEAN JOURNAL OF ENTOMOLOGY LA English DT Article DE defence; density responses; El Salvador; Ficus; gregariousness; parasitism; refuges; Tachinidae; tiger moth; tropical defoliator ID EUROPEAN CORN-BORER; PREDATION RISK; TRICHOGRAMMA-OSTRINIAE; HEMILEUCA-LUCINA; SWEET CORN; CATERPILLARS; BEHAVIOR; SATURNIIDAE; PATTERNS; STRATEGY AB Many gregarious insects aggregate in naturally occurring refuges on their host plants. However, when refuges are filled, they may be forced to aggregate on exposed areas of the plant. This study examines the effects of refuge saturation on group size and defence against parasitism in larvae of Ammalo helops Cramer (Lepidoptera: Arctiidae) that form day-resting groups on the trunks of weeping laurel, Ficus benjamina L., in El Salvador. Population densities, group sizes and parasitism were recorded on eight trees for each of four generations in 1995 and 1996. When population densities were low, all larvae were located in small groups in naturally occurring structural refuges (rotted out holes, spaces between crossing branches and under aerial roots) on the host plant. In contrast, when population densities were high and structural refuges were full, many larvae formed significantly larger groups (density refuges) on the open trunk. Between 20 and 24% of late-instar larvae were parasitized and this was inversely dependent on the size of within tree populations, in spite of populations being fragmented among structural refuges. Similarly, in a study carried out at a different location on young trees without structural refuges, parasitism of larvae was inversely related to group size. Although parasitism rates decreased with increasing group size, most larvae preferentially selected the small naturally occurring refuges, where groups were restricted to low densities. If this behaviour is an adaptive trait, I speculate that parasitism (or some other unmeasured mortality factor) is lower in naturally occurring refuges than in large open groups. C1 Univ El Salvador, Escuela Biol, San Salvador, El Salvador. RP Horgan, FG (reprint author), TEAGASC, Oak Pk Res Ctr, Carlow, Ireland. EM fhorgan@oakpark.teagasc.ie NR 29 TC 2 Z9 2 U1 2 U2 9 PU CZECH ACAD SCI, INST ENTOMOLOGY PI CESKE BUDEJOVICE PA BRANISOVSKA 31, CESKE BUDEJOVICE 370 05, CZECH REPUBLIC SN 1210-5759 J9 EUR J ENTOMOL JI Eur. J. Entomol. PD MAY 3 PY 2005 VL 102 IS 2 BP 225 EP 230 PG 6 WC Entomology SC Entomology GA 931PK UT WOS:000229497100015 ER PT J AU Lograsso, TA Schlagel, DL Pecharsky, AO AF Lograsso, TA Schlagel, DL Pecharsky, AO TI Synthesis and characterization of single crystalline Gd-5(Si,Ge1-x)(4) by the Bridgman method SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE Gd5Si2Ge2; magnetocaloric; magnetically ordered materials; crystal growth; magnetic measurements ID MAGNETIC-FIELD; GIANT MAGNETORESISTANCE; ELECTRICAL-RESISTANCE; TRANSITION; GD-5(SI2GE2); ALLOYS; GD-5(SIXGE1-X)(4); BEHAVIOR; SYSTEM AB Single crystals of Gd-5(SiGe1-x)(4) have been prepared by the Bridgman method using tungsten crucibles. The tungsten crucible was found to be chemically inert with respect to Gd, Si, Ge but did have limited solubility in liquid Gd5Si2Ge2, resulting in the precipitation of pure tungsten throughout the bulk crystal. Overall, the bulk crystal solidified in the monoclinic phase and a slight increase in Si content and decrease in Ge content at the growth proceeded was found. This increase in Si:Ge ratio resulted in a slight increase in lattice parameter of the monoclinic phase and an increase in the magnetostructural transformation temperature of Delta T=10 K. AC susceptibility measurements indicated a small fraction of orthorhombic phase was present throughout the ingot which accounts for the decrease in MCE values along the length of the ingot. (c) 2004 Elsevier B.V. All rights reserved. C1 Iowa State Univ, Mat & Engn Phys Program, Ames Lab, Ames, IA 50011 USA. RP Lograsso, TA (reprint author), Iowa State Univ, Mat & Engn Phys Program, Ames Lab, 111 Met Dev, Ames, IA 50011 USA. EM lograsso@ameslab.gov NR 26 TC 22 Z9 23 U1 0 U2 2 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 3 PY 2005 VL 393 IS 1-2 BP 141 EP 146 DI 10.1016/j.jallcom.2004.09.068 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 920UX UT WOS:000228716700026 ER PT J AU Zhang, MH Lin, WY Klein, SA Bacmeister, JT Bony, S Cederwall, RT Del Genio, AD Hack, JJ Loeb, NG Lohmann, U Minnis, P Musat, I Pincus, R Stier, P Suarez, MJ Webb, MJ Wu, JB Xie, SC Yao, MS Zhang, JH AF Zhang, MH Lin, WY Klein, SA Bacmeister, JT Bony, S Cederwall, RT Del Genio, AD Hack, JJ Loeb, NG Lohmann, U Minnis, P Musat, I Pincus, R Stier, P Suarez, MJ Webb, MJ Wu, JB Xie, SC Yao, MS Zhang, JH TI Comparing clouds and their seasonal variations in 10 atmospheric general circulation models with satellite measurements SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID LARGE-SCALE MODELS; RELAXED ARAKAWA-SCHUBERT; LAYER MIXING SCHEME; CUMULUS CONVECTION; BOUNDARY-LAYER; CLIMATE MODEL; MOIST CONVECTION; FRONTAL CLOUDS; HADLEY-CENTER; WATER-VAPOR AB [1] To assess the current status of climate models in simulating clouds, basic cloud climatologies from ten atmospheric general circulation models are compared with satellite measurements from the International Satellite Cloud Climatology Project (ISCCP) and the Clouds and Earth's Radiant Energy System (CERES) program. An ISCCP simulator is employed in all models to facilitate the comparison. Models simulated a four-fold difference in high-top clouds. There are also, however, large uncertainties in satellite high thin clouds to effectively constrain the models. The majority of models only simulated 30 - 40% of middle-top clouds in the ISCCP and CERES data sets. Half of the models underestimated low clouds, while none overestimated them at a statistically significant level. When stratified in the optical thickness ranges, the majority of the models simulated optically thick clouds more than twice the satellite observations. Most models, however, underestimated optically intermediate and thin clouds. Compensations of these clouds biases are used to explain the simulated longwave and shortwave cloud radiative forcing at the top of the atmosphere. Seasonal sensitivities of clouds are also analyzed to compare with observations. Models are shown to simulate seasonal variations better for high clouds than for low clouds. Latitudinal distribution of the seasonal variations correlate with satellite measurements at > 0.9, 0.6 - 0.9, and -0.2 - 0.7 levels for high, middle, and low clouds, respectively. The seasonal sensitivities of cloud types are found to strongly depend on the basic cloud climatology in the models. Models that systematically underestimate middle clouds also underestimate seasonal variations, while those that overestimate optically thick clouds also overestimate their seasonal sensitivities. Possible causes of the systematic cloud biases in the models are discussed. C1 SUNY Stony Brook, Inst Terr & Planetary Atmospheres, Marine Sci Res Ctr, Stony Brook, NY 11794 USA. Princeton Univ, NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08544 USA. NASA, Goddard Space Flight Ctr, Global Modeling & Anal Off, Greenbelt, MD 20771 USA. CNRS, Inst Pierre Simon Laplace, Meteorol Dynam Lab, F-75252 Paris, France. Lawrence Livermore Natl Lab, Div Atmospher Sci, Livermore, CA 94551 USA. NASA, Goddard Inst Space Studies, New York, NY 10025 USA. Natl Ctr Atmospher Res, Boulder, CO 80307 USA. NASA, Langley Res Ctr, Div Atmospher Sci, Hampton, VA 23681 USA. Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada. NOAA, CIRES, Climate Diagnost Ctr, Boulder, CO 80305 USA. Max Planck Inst Meteorol, D-20146 Hamburg, Germany. UK Met Off, Hadley Ctr Climate Predict & Res, Bracknell, Berks, England. RP Zhang, MH (reprint author), SUNY Stony Brook, Inst Terr & Planetary Atmospheres, Marine Sci Res Ctr, Stony Brook, NY 11794 USA. EM mzhang@notes.cc.sunysb.edu RI Del Genio, Anthony/D-4663-2012; Xie, Shaocheng/D-2207-2013; Stier, Philip/B-2258-2008; Pincus, Robert/B-1723-2013; Klein, Stephen/H-4337-2016; Lohmann, Ulrike/B-6153-2009; Minnis, Patrick/G-1902-2010; OI Del Genio, Anthony/0000-0001-7450-1359; Xie, Shaocheng/0000-0001-8931-5145; Stier, Philip/0000-0002-1191-0128; Pincus, Robert/0000-0002-0016-3470; Klein, Stephen/0000-0002-5476-858X; Lohmann, Ulrike/0000-0001-8885-3785; Minnis, Patrick/0000-0002-4733-6148; Bony, Sandrine/0000-0002-4791-4438 NR 75 TC 219 Z9 223 U1 1 U2 26 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 3 PY 2005 VL 110 IS D15 AR D15S02 DI 10.1029/2004JD005021 PG 18 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 926TS UT WOS:000229146500001 ER PT J AU Gomez, ED Rappl, TJ Agarwal, V Bose, A Schmutz, M Marques, CM Balsara, NP AF Gomez, ED Rappl, TJ Agarwal, V Bose, A Schmutz, M Marques, CM Balsara, NP TI Platelet self-assembly of an amphiphilic A-B-C-A tetrablock copolymer in pure water SO MACROMOLECULES LA English DT Article ID BLOCK-COPOLYMERS; POLYMER VESICLES; MUTUAL SOLUBILITIES; HYDROCARBONS C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Rhode Isl, Dept Chem Engn, Kingston, RI 02881 USA. CNRS, ICS, UPR 22, F-67083 Strasbourg, France. CNRS, Inst Phys, LDFC, ULP,UMR 7506, F-67084 Strasbourg, France. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Environm Energy & Technol, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RI Marques, Carlos/B-2322-2010; Schmutz, Marc/A-4953-2012; Gomez, Enrique/E-5887-2013; OI Marques, Carlos/0000-0002-3952-0498; Schmutz, Marc/0000-0003-4059-7609; Marques, Carlos/0000-0002-6526-1258 NR 36 TC 29 Z9 29 U1 0 U2 10 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 3 PY 2005 VL 38 IS 9 BP 3567 EP 3570 DI 10.1021/ma047466c PG 4 WC Polymer Science SC Polymer Science GA 921BG UT WOS:000228738600008 ER PT J AU Reynolds, BJ Ruegg, ML Mates, TE Radke, CJ Balsara, NP AF Reynolds, BJ Ruegg, ML Mates, TE Radke, CJ Balsara, NP TI Experimental and theoretical study of the adsorption of a diblock copolymer to interfaces between two homopolymers SO MACROMOLECULES LA English DT Article ID POLYMER-POLYMER INTERFACE; SEGMENT DENSITY DISTRIBUTION; MOLECULAR-WEIGHT DEPENDENCE; ION MASS-SPECTROMETRY; BLOCK-COPOLYMERS; IMMISCIBLE POLYMERS; BICONTINUOUS MICROEMULSIONS; PHASE-BEHAVIOR; NEUTRON REFLECTIVITY; BLENDS AB Dynamic secondary-ion mass spectrometry (SIMS) was used to measure equilibrium volume-fraction profiles of a symmetric diblock copolymer at a polymer/polymer interface. The three polymers were a saturated polybutadiene with 90% 1,2-addition (sPB90) homopolymer, a saturated polybutadiene with 63% 1,2-addition (sPB63) homopolymer, and a sPB90-sPB63 diblock copolymer. The molecular weights of the homopolymers were chosen such that the sPB90/sPB63 blend was deep in the two-phase region. The experimentally determined volume-fraction profiles were compared with self-consistent-field theory calculations (SCFT). The statistical segment lengths and the Flory-Huggins interaction parameter were obtained independently from small-angle neutron scattering (SANS) measurements on a low molecular weight, homogeneous binary sPB90/sPB63 blend. Thus, no adjustable parameters were used in the SCFT calculations. Adsorption isotherms and the measured diblock copolymer volume-fraction profiles are in excellent agreement with the SCFT calculations. This work demonstrates that Flory-Huggins interaction parameters and statistical segment lengths determined by SANS can be used to predict complex phase behavior, including interfacial adsorption of block copolymers. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Earth Sci, 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 Energy Technol Div, Berkeley, CA 94720 USA. RP Reynolds, BJ (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. NR 56 TC 18 Z9 18 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD MAY 3 PY 2005 VL 38 IS 9 BP 3872 EP 3882 DI 10.1021/ma047539s PG 11 WC Polymer Science SC Polymer Science GA 921BG UT WOS:000228738600047 ER PT J AU Bruno, WJ Yang, J Pearson, JE AF Bruno, WJ Yang, J Pearson, JE TI Using independent open-to-closed transitions to simplify aggregated Markov models of ion channel gating kinetics SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE canonical topology; systems identification; rank; detailed balance ID STOCHASTIC PROPERTIES; DETAILED BALANCE; MICROSCOPIC REVERSIBILITY; K+ CHANNELS; RECEPTOR; MECHANISM; MEMBRANE; MUTATION; PATCH AB Deducing plausible reaction schemes from single-channel current traces is time-consuming and difficult. The goal is to find the simplest scheme that fits the data, but there are many ways to connect even a small number of states (>2 million schemes with four open and four closed states). Many schemes make identical predictions. An exhaustive search over model space does not address the many equivalent schemes that will result. We have found a canonical form that can express all reaction schemes for binary channels. This form has the minimal number of rate constants for any rank (number of independent open-closed transitions), unlike other canonical forms such as the well established "uncoupled" scheme. Because all of the inter-conductance transitions in the new form are independent, we refer to it as the manifest interconductance rank (MIR) form. in the case of four open and four closed states, there are four MIR form schemes, corresponding to ranks 1-4. For many models proposed in the literature for specific ion channels, the equivalent MIR form has dramatically fewer links than the uncoupled form. By using the MIR form we prove that all rank 1 topologies with a given number of open and closed states make identical predictions in steady state, thus narrowing the search space for simple models. Moreover, we prove that fitting to canonical form preserves detailed balance. We also propose an efficient hierarchical algorithm for searching for the simplest possible model consistent with a given data set. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Pearson, JE (reprint author), Los Alamos Natl Lab, MS K-710, Los Alamos, NM 87545 USA. EM pearson@lanl.gov FU NIGMS NIH HHS [1R01GM65830-01, R01 GM065830] NR 32 TC 53 Z9 58 U1 0 U2 2 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 3 PY 2005 VL 102 IS 18 BP 6326 EP 6331 DI 10.1073/pnas.0409110102 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 923OE UT WOS:000228918400017 PM 15843461 ER PT J AU Medina, M AF Medina, M TI Genomes, phylogeny, and evolutionary systems biology SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article; Proceedings Paper CT Colloquium on Systematics and the Origin of Species CY DEC 16-18, 2004 CL Irvine, CA SP Natl Acad Sci & Engn DE postgenomics; eukaryotic genomics; network evolution ID PROTEIN-INTERACTION NETWORK; SACCHAROMYCES-CEREVISIAE; GENE-EXPRESSION; DROSOPHILA-PSEUDOOBSCURA; COEXPRESSION NETWORK; MOLECULAR EVOLUTION; REGULATORY NETWORKS; METABOLIC NETWORKS; INTERACTION MAP; DRAFT SEQUENCE AB With the completion of the human genome and the growing number of diverse genomes being sequenced, a new age of evolutionary research is currently taking shape. The myriad of technological breakthroughs in biology that are leading to the unification of broad scientific fields such as molecular biology, biochemistry, physics, mathematics, and computer science are now known as systems biology. Here, I present an overview, with an emphasis on eukaryotes, of how the postgenomics era is adopting comparative approaches that go beyond comparisons among model organisms to shape the nascent field of evolutionary systems biology. C1 Dept Energy Joint Genome Inst, Dept Evolutionary Genom, Walnut Creek, CA 94598 USA. RP Medina, M (reprint author), Univ Calif, Sch Nat Sci, POB 2039, Merced, CA 95344 USA. EM mmedina@ucmerced.edu NR 84 TC 40 Z9 40 U1 1 U2 8 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 3 PY 2005 VL 102 SU 1 BP 6630 EP 6635 DI 10.1073/pnas.0501984102 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 925AK UT WOS:000229023700018 PM 15851668 ER PT J AU Lee, JK Tewell, CR Schulze, RK Nastasi, M Hamby, DW Lucca, DA Jung, HS Hong, KS AF Lee, JK Tewell, CR Schulze, RK Nastasi, M Hamby, DW Lucca, DA Jung, HS Hong, KS TI Synthesis of ZnO nanocrystals by subsequent implantation of Zn and O species SO APPLIED PHYSICS LETTERS LA English DT Article ID ION-IMPLANTATION; QUANTUM DOTS; COLLOIDS; LUMINESCENCE; GROWTH; SIZE; PARTICLES; GLASSES AB We report the preparation of ZnO nanocrystals embedded in a SiO2 matrix formed using sequential zinc and oxygen ion implantations. The optical absorption spectra and photoemission spectra of zinc implanted and zinc/oxygen coimplanted silica show that the first zinc implantation produces zinc clusters and that the subsequent oxygen implantation following the zinc implantation rearranges the distribution of zinc and oxygen ions at an atomic level. While thermal annealing of Zn only implanted silica leads to the formation of Zn nanocrystals, thermal annealing of zinc/oxygen coimplanted silica promotes the growth of ZnO nanocrystals. The absorption and photoluminescence spectra show that ZnO nanocrystals form in an amorphous SiO2 matrix and that their systematic change as a function of annealing temperature corresponds to the typical correlation between the increase of particle size and a redshift in near-band-edge emission. (c) 2005 American Institute of Physics. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87544 USA. Oklahoma State Univ, Sch Mech & Aerosp Engn, Stillwater, OK 74078 USA. Seoul Natl Univ, Seoul 151742, South Korea. RP Lee, JK (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, POB 1663, Los Alamos, NM 87544 USA. EM jklee@lanl.gov RI Jung, Hyun Suk/D-4745-2011; Jung, Hyun Suk/H-3659-2015 NR 31 TC 31 Z9 31 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAY 2 PY 2005 VL 86 IS 18 AR 183111 DI 10.1063/1.1906304 PG 3 WC Physics, Applied SC Physics GA 928RF UT WOS:000229288700052 ER PT J AU Leonard, F Haataja, M AF Leonard, F Haataja, M TI Alloy destabilization by dislocations SO APPLIED PHYSICS LETTERS LA English DT Article ID SPINODAL DECOMPOSITION AB Thermodynamic phase diagrams of alloys are usually computed or experimentally determined under the assumption of perfect crystallinity of the material. Here, we show that dislocations can change the phase stability of alloys and increase the size of the miscibility gap. This dislocation-induced destabilization of the alloy originates from an interaction between the elastic fields of the dislocations and those due to composition variations. We predict that the characteristic time scale for the growth of compositional fluctuations depends inversely on the dislocation mobility. (c) 2005 American Institute of Physics. C1 Sandia Natl Labs, Livermore, CA 94551 USA. Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA. RP Sandia Natl Labs, Livermore, CA 94551 USA. EM fleonar@ca.sandia.gov NR 9 TC 11 Z9 11 U1 0 U2 1 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 2 PY 2005 VL 86 IS 18 AR 181909 DI 10.1063/1.1922578 PG 3 WC Physics, Applied SC Physics GA 928RF UT WOS:000229288700020 ER PT J AU Xu, GY Hiraka, H Shirane, G Li, JF Wang, JL Viehland, D AF Xu, GY Hiraka, H Shirane, G Li, JF Wang, JL Viehland, D TI Low symmetry phase in (001) BiFeO3 epitaxial constrained thin films SO APPLIED PHYSICS LETTERS LA English DT Article ID POLARIZATION AB The lattice of (001)-oriented BiFeO3 epitaxial thin film has been identified by synchrotron x-ray diffraction. By choosing proper scattering zones containing the fixed (001) reflection, we have shown that low-symmetry phases similar to a M-A phase exist in the thin film at room temperature. These results demonstrate a change in phase stability from rhombohedral in bulk single crystals, to a modified monoclinic structure in epitaxial thin films. 2005 American Institute of Physics. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA. RP Xu, GY (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM gxu@bnl.gov RI Xu, Guangyong/A-8707-2010; WANG, Junling/B-3596-2009 OI Xu, Guangyong/0000-0003-1441-8275; WANG, Junling/0000-0003-3663-7081 NR 17 TC 102 Z9 103 U1 3 U2 28 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 2 PY 2005 VL 86 IS 18 AR 182905 DI 10.1063/1.1924891 PG 3 WC Physics, Applied SC Physics GA 928RF UT WOS:000229288700041 ER PT J AU Xu, X Armitage, R Shinkai, S Sasaki, K Kisielowski, C Weber, ER AF Xu, X Armitage, R Shinkai, S Sasaki, K Kisielowski, C Weber, ER TI Epitaxial condition and polarity in GaN grown on a HfN-buffered Si(111) wafer SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; INVERSION DOMAIN BOUNDARIES; ATOMIC-STRUCTURE; LAYERS; FILMS; SI; SAPPHIRE AB Single-crystal GaN thin films have been deposited epitaxially on a HfN-buffered Si(111) substrates by molecular-beam epitaxy. The microstructural and compositional characteristics of the films were studied in detail by transmission electron microscopy (TEMs). Cross-sectional TEM investigations have revealed the crystallographic orientation relationship in different GaN/HfN/Si layers. GaN film polarity is studied by conventional TEM and convergent beam electron diffraction simulations, and the results show that the GaN film has a Ga polarity with relatively high density of inversion domains. Based on our observations, growth mechanisms related to the structural properties are discussed. (c) 2005 American Institute of Physics. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Kitami Inst Technol, Fac Engn, Dept Mat Sci, Kitami, Hokkaido 0908507, Japan. Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Xu, X (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. EM xyxu@lbl.gov NR 19 TC 12 Z9 13 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 2 PY 2005 VL 86 IS 18 AR 182104 DI 10.1063/1.1923192 PG 3 WC Physics, Applied SC Physics GA 928RF UT WOS:000229288700029 ER PT J AU Yang, X Simpson, ML Randolph, SJ Rack, PD Baylor, LR Cui, H Gardner, WL AF Yang, X Simpson, ML Randolph, SJ Rack, PD Baylor, LR Cui, H Gardner, WL TI Integrated tungsten nanofiber field emission cathodes selectively grown by nanoscale electron beam-induced deposition SO APPLIED PHYSICS LETTERS LA English DT Article ID FABRICATION; DEVICES; ARRAY; NANOSTRUCTURES; NANOTUBES; EMITTERS AB We report on the fabrication and operation of integrated field emission cathodes containing single tungsten (W) nanofibers selectively grown by nanoscale electron beam induced deposition (EBID). A nonorganometallic precursor, WF6, was used to deposit metallic W fibers. Vacuum electrical testing reveals electrons were successfully extracted from the W nanofiber tip and were collected by a phosphor anode. Direct current versus voltage (I-V) curves exhibited Fowler-Nordheim behavior, indicating the occurrence of cold field emission. Electrical testing of these devices indicated that EBID direct-write is a promising technique for direct production or repair of field emission cathodes. (c) 2005 American Institute of Physics. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol MENT Res Grp, Oak Ridge, TN 37831 USA. RP Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. EM prack@utk.edu RI Simpson, Michael/A-8410-2011; OI Simpson, Michael/0000-0002-3933-3457; Rack, Philip/0000-0002-9964-3254 NR 34 TC 17 Z9 17 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 2 PY 2005 VL 86 IS 18 AR 183106 DI 10.1063/1.1922568 PG 3 WC Physics, Applied SC Physics GA 928RF UT WOS:000229288700047 ER PT J AU Vega-Arroyo, M LeBreton, PR Rajh, T Zapol, P Curtiss, LA AF Vega-Arroyo, M LeBreton, PR Rajh, T Zapol, P Curtiss, LA TI Density functional study of the TiO2-dopamine complex SO CHEMICAL PHYSICS LETTERS LA English DT Article ID EFFECTIVE CORE POTENTIALS; AB-INITIO; MOLECULAR CALCULATIONS; TIO2 NANOPARTICLES; CHARGE SEPARATION; SURFACE; TIO2(110); BI AB The binding energies and excitation energies of dopamine interacting with TiO2 clusters of different sizes representing an anatase surface are calculated. Results indicate that bidentate adsorption of dopamine on undercoordinated sites containing a Ti=O double bond is more stable than monodentate or molecular adsorption on the (101) anatase surface. A large red shift in the absorption spectrum of TiO2-dopamine is calculated, in agreement with experimental studies. We also investigate how the optical properties of TiO2-dopamine are affected by adding carboxyl thymine and subsequent base pairing with adenine. (c) 2005 Published by Elsevier B.V. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Univ Illinois, Dept Chem, Chicago, IL 60607 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Zapol, P (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM zapol@anl.gov RI Zapol, Peter/G-1810-2012 OI Zapol, Peter/0000-0003-0570-9169 NR 27 TC 42 Z9 42 U1 4 U2 29 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 2 PY 2005 VL 406 IS 4-6 BP 306 EP 311 DI 10.1016/j.cplett.2005.03.029 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 920FY UT WOS:000228676000005 ER PT J AU Wang, JH Pluth, JM Cooper, PK Cowan, MJ Chen, DJ Yannone, SM AF Wang, JH Pluth, JM Cooper, PK Cowan, MJ Chen, DJ Yannone, SM TI Artemis deficiency confers a DNA double-strand break repair defect and Artemis phosphorylation status is altered by DNA damage and cell cycle progression SO DNA REPAIR LA English DT Article DE artemis; DNA repair; NHEJ; V(D)J recombination; SCID; DNA double-strand breaks ID DEPENDENT PROTEIN-KINASE; SEVERE COMBINED IMMUNODEFICIENCY; SPEAKING NATIVE-AMERICANS; LIGASE-IV; CATALYTIC SUBUNIT; V(D)J RECOMBINATION; RADIOSENSITIZING AGENT; GENOMIC INSTABILITY; H3 PHOSPHORYLATION; CHROMOSOME 10P AB Mutations in the Artemis gene are causative in a subset of human severe combined immunodeficiencies (SCIDs) and Artemis-deficient cells exhibit radiation sensitivity and defective V(D)J recombination, implicating Artemis function in non-homologous end joining (NHEJ). Here we show that Artemis-deficient cells from Athabascan-speaking Native American SCID patients (SCIDA) display significantly elevated sensitivity to ionizing radiation (IR) but only a very subtle defect in DNA double-strand (DSB) break repair in contrast to the severe DSB repair defect of NHEJ-deficient cells. Primary human SCIDA fibroblasts accumulate and exhibit persistent arrest at both the G1/S and G2/M boundaries in response to IR, consistent with the presence of persistent DNA damage. Artemis protein is phosphorylated in a PI3-like kinase-dependent manner after either IR or a number of other DNA damaging treatments including etoposide, but SCIDA cells are not hypersensitive to treatment with etoposide. Inhibitor studies with various DNA damaging agents establish multiple phosphorylation states and suggest multiple kinases function in Artemis phosphorylation. We observe that Artemis phosphorylation occurs rapidly after irradiation like that of histone H2AX. However, unlike H2AX, Artemis de-phosphorylation is uncoupled from overall DNA repair and correlates instead with cell cycle progression to or through mitosis. Our results implicate a direct and non-redundant function of Artemis in the repair of a small subset of DNA double-strand breaks, possibly those with hairpin termini, which may account for the pronounced radiation sensitivity observed in Artemis-deficient cells. (c) 2005 Elsevier B.V. All rights reserved. C1 Lawrence Berkeley Natl Lab, Div Life Sci, Dept Mol Biol, Berkeley, CA 94720 USA. Univ Calif San Francisco, Childrens Hosp, BMT Div, San Francisco, CA 94143 USA. RP Yannone, SM (reprint author), Lawrence Berkeley Natl Lab, Div Life Sci, Dept Mol Biol, Mail Stop 74-157,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM smyannone@lbl.gov RI Yannone, Steven/G-1927-2011 FU NCI NIH HHS [CA86936, CA50519, P01-CA92584]; NIAID NIH HHS [AI28339] NR 55 TC 63 Z9 68 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1568-7864 J9 DNA REPAIR JI DNA Repair PD MAY 2 PY 2005 VL 4 IS 5 BP 556 EP 570 DI 10.1016/j.dnarep.2005.02.001 PG 15 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA 918IJ UT WOS:000228535200004 PM 15811628 ER PT J AU Ilton, ES Haiduc, A Cahill, CL Felmy, AR AF Ilton, ES Haiduc, A Cahill, CL Felmy, AR TI Mica surfaces stabilize pentavalent uranium SO INORGANIC CHEMISTRY LA English DT Article ID X-RAY PHOTOELECTRON; REDUCTION; URANATES; MINERALS; SORPTION; URANYL; XPS AB High-resolution X-ray photoelectron spectroscopy was used to demonstrate that reduction of aqueous U6+ at ferrous mica surfaces at 25 degrees C preserves U5+ as the dominant sorbed species over a broad range of solution compositions. Polymerization of sorbed U5+ with sorbed U6+ and U4+ is identified as a possible mechanism for how mineral surfaces circumvent the rapid disproportionation of aqueous U5+. The general nature of this mechanism suggests that U5+ could play an important, but previously unidentified, role in the low-temperature chemistry of uranium in reducing, heterogeneous aqueous systems. C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. Shell Global Solut Int BV, NL-1030 BN Amsterdam, Netherlands. George Washington Univ, Dept Chem, Washington, DC 20052 USA. Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA. RP Ilton, ES (reprint author), Pacific NW Natl Lab, Div Chem Sci, MSIN K8-96,902 Battelle Blvd, Richland, WA 99352 USA. EM Eugene.Ilton@pnl.gov NR 28 TC 78 Z9 78 U1 1 U2 24 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 2 PY 2005 VL 44 IS 9 BP 2986 EP 2988 DI 10.1021/ic0487272 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 922CL UT WOS:000228813400002 PM 15847396 ER PT J AU Schlueter, JA Manson, JL Geiser, U AF Schlueter, JA Manson, JL Geiser, U TI Structural and magnetic diversity in tetraalkylammonium salts of anionic M[N(CN)(2)](3)(-) (M = Mn and Ni) three-dimensional coordination polymers SO INORGANIC CHEMISTRY LA English DT Article ID METAL PSEUDOHALIDES; HEISENBERG MODEL; DICYANAMIDE; CO; N(CN)(2)(-); NETWORKS; SYSTEMS; SPIN AB Tetraalkylammonium cations, (NR4)(+) (R = C3H7, CA, and C5H11), have been used as templates to form a new family of [M(dca)(3)](-) [M = Mn and Ni; dca = dicyanamide or N(CN)(2)(-)] salts. The tetrapropylammonium (TPrA) salts possess a perovskite-type anion structure. (TPrA)[Mn(dca)(3)] (1) crystallizes in the tetragonal space group P42(1)c, with a = 16.2945(8) angstrom, c = 17,4321(8) angstrom, and V = 4628.4(6) angstrom(3) at T = 298 K. At room temperature, (TPrA)[Ni(dca)(3)] (2) crystallizes in the orthorhombic space group Pnna, with a = 17.171(2) angstrom, b = 22.992(2) angstrom, c = 22.750(2) angstrom, and V = 8981(2) angstrom(3), but undergoes a first-order phase transition within the temperature range 150-220 K to the tetragonal space group P42(1)c, with a = 16.0985(7) angstrom, c = 17.0287(8) angstrom, and V = 4413.2(5) angstrom(3) at T = 160 K. At 110 K, 2 returns to the Pnna space group with a = 17.116(2) angstrom, b = 22.800(3) angstrom, c = 22.641(3) angstrom, and V = 8835(3) angstrom(3). The tetrabutylammonium (TBA) salts possess a triple rutile structure. (TBA)[Mn(dca)(3)] (3) crystallizes in the orthorhombic space group P2(1)2(1)2, with a = 16.0107(6) angstrom, b = 16.0114(6), c = 21.5577(8) angstrom, and V = 5526.4(5) angstrom(3). (TBA)[Ni(dca)(3)] (4) also crystallizes in the orthorhombic space group P2(1)2(1)2, with a = 15.6842(5) angstrom, b = 15.6841(6) angstrom, c = 21.1551(8) angstrom, and V = 5204.0(5) angstrom(3). The tetrapentylammonium (TPnA) salts crystallize with a LiSbO3 structure type, space group Pnna. Lattice parameters for (TPnA)[Mn(dca)(3)] (5) are a = 13.2236(6) angstrom, b = 11.6300(6) angstrom, c = 20.3176(9) angstrom, and V = 3124.6(4) angstrom(3), and for (TPnA)[Ni(dca)(3)] (6), a = 12.9380(4) angstrom, b = 11.6233(4) angstrom, c = 19.8038(7) angstrom, and V = 2978.1(2) angstrom(3). Long-range antiferromagnetic ordering has been observed in the manganese salts below 2.1 K, as indicated by alternating current susceptibility measurements. Magnetic susceptibility data for the nickel salts do not show evidence for long-range magnetic ordering but can be described using an S = 1 zero-field splitting model with the exchange Hamiltonian H= -J Sigma SiSj+1 + D Sigma(Si-j(z))(2) + g mu(beta)B Sigma S-i, giving vertical bar D vertical bar/k(B) values that range between 1.98(1) K and 3.20(2) K. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA. RP Schlueter, JA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM JASchlueter@anl.gov NR 28 TC 53 Z9 53 U1 2 U2 14 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 2 PY 2005 VL 44 IS 9 BP 3194 EP 3202 DI 10.1021/ic0484598 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 922CL UT WOS:000228813400033 PM 15847427 ER PT J AU Chekanov, S Derrick, M Magill, S Miglioranzi, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Pavel, N Molina, AGY Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Margotti, A Montanari, A Nania, R Palmonari, F Pesci, A Polini, A Rinaldi, L Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Voss, KC Wang, M Wlasenko, M Bailey, DS Brook, NH Cole, JE Heath, GP Namsoo, T Robins, S Capua, M Mastroberardino, A Schioppa, M Susinno, G Tassi, E Kim, JY Ma, KJ Helbich, M Ning, Y Ren, Z Schmidke, WB Sciulli, E Chwastowski, J Eskreys, A Figiel, J Galas, A Olkiewicz, K Stopa, P Szuba, D Zawiejski, L Adamczyk, L Bold, T Grabowska-Bold, I Kisielewska, D Kowal, AM Lukasik, J Przybycien, M Suszycki, L Szuba, J Kotanski, A Slominski, W Adler, V Behrens, U Bloch, I Borras, K Cassel, DG Drews, G Fourletova, J Geiser, A Gladkov, D Goebel, F Gottlicher, P Diaz, RG Gutsche, O Haas, T Hain, W Horn, C Kahle, B Kasemann, M Kotz, U Kowalski, H Kramberger, G Lelas, D Lim, H Lohr, B Mankel, R Martinez, M Melzer-Pellmann, IA Nguyen, CN Notz, D Nuncio-Quiroz, AE Raval, A Santamarta, R Schneekloth, U Stosslein, U Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Karstens, F Dobur, D Vlasov, NN Bussey, PJ Doyle, AT Ferrando, J Hamilton, J Hanlon, S Saxon, DH Skillicorn, IO Gialas, I Carli, T Gosau, T Holm, U Krumnack, N Lohrmann, E Milite, M Salehi, H Schleper, P Schorner-Sadenius, T Stonjek, S Wichmann, K Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Fry, C Goncalo, R Long, KR Tapper, AD Kataoka, M Nagano, K Tokushuku, K Yamada, S Yamazakai, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Son, D de Favereau, J Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Jimenez, M Labarga, L del Peso, J Terron, J Zambrana, M Barbi, M Corriveau, F Liu, C Padhi, S Plamondon, M Stairs, DG Walsh, R Zhou, C Tsurugai, T Antonov, A Danilov, P Dolgoshein, BA Sosnovtsev, V Stifutkin, A Suchkov, S Dementiev, RK Ermolov, R Gladilin, LK Katkov, II Khein, LA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Zotkin, DS Zotkin, SA Abt, I Buttner, C Caldwell, A Liu, X Sutiak, J Coppola, N Grigorescu, G Grijpink, S Keramidas, A Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Vazquez, M Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Allfrey, PD Bell, MA Cooper-Sarkar, AM Cottrell, A Devenish, RCE Foster, B Grzelak, G Gwenlan, C Kohno, T Patel, S Straub, PB Walczak, R Bellan, P Bertolin, A Brugnera, R Carlin, R Ciesielski, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Stanco, L Turcato, M Heaphy, EA Metlica, F Oh, BY Whitmore, JJ Iga, Y D'Agostini, G Marini, G Nigro, A Hart, JC Abramowicz, H Gabareen, A Groys, M Kananov, S Kreisel, A Levy, A Kuze, M Kagawa, S Tawara, T Hamatsu, R Kaji, H Kitamura, S Matsuzawa, K Ota, O Ri, YD Costa, M Ferrero, MI Monaco, V Sacchi, R Solano, A Arneodo, M Ruspa, M Fourletov, S Koop, T Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Loizides, JH Sutton, MR Targett-Adams, C Wing, M Ciborowski, J Kulinski, P Luzniak, P Malka, J Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Tyszkiewicz, A Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Hochman, D Karshon, U Lightwood, MS Everett, A Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Ryan, P Savin, AA Smith, WH Dhawan, S Bhadra, S Catterall, CD Cui, Y Hartner, G Menary, S Noor, U Soares, M Standage, J Whyte, J AF Chekanov, S Derrick, M Magill, S Miglioranzi, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Pavel, N Molina, AGY Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Margotti, A Montanari, A Nania, R Palmonari, F Pesci, A Polini, A Rinaldi, L Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Voss, KC Wang, M Wlasenko, M Bailey, DS Brook, NH Cole, JE Heath, GP Namsoo, T Robins, S Capua, M Mastroberardino, A Schioppa, M Susinno, G Tassi, E Kim, JY Ma, KJ Helbich, M Ning, Y Ren, Z Schmidke, WB Sciulli, E Chwastowski, J Eskreys, A Figiel, J Galas, A Olkiewicz, K Stopa, P Szuba, D Zawiejski, L Adamczyk, L Bold, T Grabowska-Bold, I Kisielewska, D Kowal, AM Lukasik, J Przybycien, M Suszycki, L Szuba, J Kotanski, A Slominski, W Adler, V Behrens, U Bloch, I Borras, K Cassel, DG Drews, G Fourletova, J Geiser, A Gladkov, D Goebel, F Gottlicher, P Diaz, RG Gutsche, O Haas, T Hain, W Horn, C Kahle, B Kasemann, M Kotz, U Kowalski, H Kramberger, G Lelas, D Lim, H Lohr, B Mankel, R Martinez, M Melzer-Pellmann, IA Nguyen, CN Notz, D Nuncio-Quiroz, AE Raval, A Santamarta, R Schneekloth, U Stosslein, U Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Karstens, F Dobur, D Vlasov, NN Bussey, PJ Doyle, AT Ferrando, J Hamilton, J Hanlon, S Saxon, DH Skillicorn, IO Gialas, I Carli, T Gosau, T Holm, U Krumnack, N Lohrmann, E Milite, M Salehi, H Schleper, P Schorner-Sadenius, T Stonjek, S Wichmann, K Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Fry, C Goncalo, R Long, KR Tapper, AD Kataoka, M Nagano, K Tokushuku, K Yamada, S Yamazakai, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Son, D de Favereau, J Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Jimenez, M Labarga, L del Peso, J Terron, J Zambrana, M Barbi, M Corriveau, F Liu, C Padhi, S Plamondon, M Stairs, DG Walsh, R Zhou, C Tsurugai, T Antonov, A Danilov, P Dolgoshein, BA Sosnovtsev, V Stifutkin, A Suchkov, S Dementiev, RK Ermolov, R Gladilin, LK Katkov, II Khein, LA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Zotkin, DS Zotkin, SA Abt, I Buttner, C Caldwell, A Liu, X Sutiak, J Coppola, N Grigorescu, G Grijpink, S Keramidas, A Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Vazquez, M Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Allfrey, PD Bell, MA Cooper-Sarkar, AM Cottrell, A Devenish, RCE Foster, B Grzelak, G Gwenlan, C Kohno, T Patel, S Straub, PB Walczak, R Bellan, P Bertolin, A Brugnera, R Carlin, R Ciesielski, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Stanco, L Turcato, M Heaphy, EA Metlica, F Oh, BY Whitmore, JJ Iga, Y D'Agostini, G Marini, G Nigro, A Hart, JC Abramowicz, H Gabareen, A Groys, M Kananov, S Kreisel, A Levy, A Kuze, M Kagawa, S Tawara, T Hamatsu, R Kaji, H Kitamura, S Matsuzawa, K Ota, O Ri, YD Costa, M Ferrero, MI Monaco, V Sacchi, R Solano, A Arneodo, M Ruspa, M Fourletov, S Koop, T Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Loizides, JH Sutton, MR Targett-Adams, C Wing, M Ciborowski, J Kulinski, P Luzniak, P Malka, J Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Tyszkiewicz, A Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Hochman, D Karshon, U Lightwood, MS Everett, A Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Ryan, P Savin, AA Smith, WH Dhawan, S Bhadra, S Catterall, CD Cui, Y Hartner, G Menary, S Noor, U Soares, M Standage, J Whyte, J TI Study of deep inelastic inclusive and diffractive scattering with the ZEUS forward plug calorimeter SO NUCLEAR PHYSICS B LA English DT Article ID MONTE-CARLO GENERATOR; CENTRAL TRACKING DETECTOR; EP SCATTERING; CROSS-SECTION; LOW X; EXCLUSIVE ELECTROPRODUCTION; PERTURBATION-THEORY; BARREL CALORIMETER; NUCLEON SCATTERING; HERA AB Deep inelastic scattering and its diffractive component, ep -> e'y*p -> e'XN, have been studied at HERA with the ZEUS detector using an integrated luminosity of 4.2 pb(-1). The measurement covers a wide range in the y*p c.m. energy W (37-245 GeV), photon virtuality Q(2) (2.2-80 GeV2) and mass M-X (0.28-35 GeV). The diffractive cross section for M-X > 2 GeV rises strongly with W; the rise is steeper with increasing Q(2). The latter observation excludes the description of diffraclive deep inelastic scattering in terms of the exchange of a single pomeron. The ratio of diffractive to total cross section is constant as a function of W, in contradiction to the expectation of Regge phenomenology combined with a naive extension of the optical theorem to y*p scattering. Above M-X of 8 GeV, the ratio is flat with Q(2), indicating a leading-twist behaviour of the diffractive cross section. The data are also presented in terms of the diffractive structure function, F-2(D(3)) (beta, x(P), Q(2)) of the proton. For fixed beta, the Q(2) dependence of x(P)F2(D)((3)) changes with x(P) in violation of Regge factorisation. For fixed xp, x(P,) x(P)F(2)(D(3)) rises as beta -> 0, the rise accelerating with increasing Q(2). These positive scaling violations suggest substantial contributions of perturbative effects in the diffractive DIS cross section. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Andrews Univ, Berrien Springs, MI 49104 USA. Humboldt Univ, Inst Phys, Berlin, Germany. Univ Bologna, Bologna, Italy. Ist Nazl Fis Nucl, I-40126 Bologna, Italy. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England. Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. Ist Nazl Fis Nucl, Cosenza, Italy. Chonnam Natl Univ, Kwangju, South Korea. Columbia Univ, Nevis Labs, Irvington, NY 10027 USA. Inst Nucl Phys, Krakow, Poland. AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland. Jagiellonian Univ, Dept Phys, Krakow, Poland. Deutsch Elektron Synchrotron DESY, Hamburg, Germany. Deutsch Elektron Synchrotron DESY, Zeuthen, Germany. Univ Florence, Florence, Italy. Ist Nazl Fis Nucl, I-50125 Florence, Italy. Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany. Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Univ Hamburg, Inst Expt Phys, Hamburg, Germany. Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan. Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea. Catholic Univ Louvain, Inst Nucl Phys, B-3000 Louvain, Belgium. Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan. Moscow Phys Engn Inst, Moscow, Russia. Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, Amsterdam, Netherlands. Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Univ Oxford, Dept Phys, Oxford, England. Univ Padua, Dipartimento Fis, Padua, Italy. Ist Nazl Fis Nucl, Padua, Italy. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Polytech Univ, Sagamihara, Kanagawa, Japan. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, Rome, Italy. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, IL-69978 Tel Aviv, Israel. Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan. Univ Turin, Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Piemonte Orientale, Novara, Italy. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. UCL, Dept Phys & Astron, London, England. Warsaw Univ, Inst Expt Phys, Warsaw, Poland. Inst Nucl Studies, PL-00681 Warsaw, Poland. Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Yale Univ, Dept Phys, New Haven, CT 06520 USA. Nara Womens Univ, Nara 630, Japan. Univ Lodz, PL-90131 Lodz, Poland. Univ Hamburg, Hamburg, Germany. York Univ, Dept Phys, N York, ON M3J 1P3, Canada. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM yoshida@mail.desy.de RI Wing, Matthew/C-2169-2008; Doyle, Anthony/C-5889-2009; collins-tooth, christopher/A-9201-2012; Ferrando, James/A-9192-2012; Levchenko, B./D-9752-2012; Proskuryakov, Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Wiggers, Leo/B-5218-2015; Tassi, Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; Suchkov, Sergey/M-6671-2015; De Pasquale, Salvatore/B-9165-2008; dusini, stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Li, Liang/O-1107-2015; Graciani Diaz, Ricardo/I-5152-2016; Capua, Marcella/A-8549-2015; OI Doyle, Anthony/0000-0001-6322-6195; Ferrando, James/0000-0002-1007-7816; Wiggers, Leo/0000-0003-1060-0520; Gladilin, Leonid/0000-0001-9422-8636; De Pasquale, Salvatore/0000-0001-9236-0748; dusini, stefano/0000-0002-1128-0664; Goncalo, Ricardo/0000-0002-3826-3442; Li, Liang/0000-0001-6411-6107; Graciani Diaz, Ricardo/0000-0001-7166-5198; Kasemann, Matthias/0000-0002-0429-2448; Capua, Marcella/0000-0002-2443-6525; Arneodo, Michele/0000-0002-7790-7132; Longhin, Andrea/0000-0001-9103-9936; Gutsche, Oliver/0000-0002-8015-9622; Raval, Amita/0000-0003-0164-4337 NR 81 TC 92 Z9 92 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 2 PY 2005 VL 713 IS 1-3 BP 3 EP 80 DI 10.1016/j.nuclphysb.2005.02.001 PG 78 WC Physics, Particles & Fields SC Physics GA 920TC UT WOS:000228712000001 ER PT J AU Gorbahn, M Haisch, U AF Gorbahn, M Haisch, U TI Effective Hamiltonian for non-leptonic vertical bar Delta F vertical bar=1 decays at NNLO in QCD SO NUCLEAR PHYSICS B LA English DT Article ID RENORMALIZED GREENS FUNCTIONS; ANOMALOUS DIMENSION MATRIX; NON-LEPTONIC DECAYS; HIGGS-KIBBLE MODEL; LEADING ORDER; EVANESCENT OPERATORS; MASSLESS PARTICLES; ASYMPTOTIC FREEDOM; STANDARD MODEL; BETA-FUNCTIONS AB We compute the effective Hamiltonian for non-leptonic vertical bar Delta F vertical bar = 1 decays in the standard model including next-to-next-to-leading order QCD corrections. In particular, we present the complete three-loop anomalous dimension matrix describing the mixing of current-current and QCD penguin operators. The calculation is performed in an operator basis which allows to consistently use fully anticommuting gamma(5) in dimensional regularization at an arbitrary number of loops. The renormalization scheme dependences and their cancellation in physical quantities is discussed in detail. Furthermore, we demonstrate how our results are transformed to a different basis of effective operators which is frequently adopted in phenomenological applications. We give all necessary two-loop constant terms which allow to obtain the three-loop anomalous dimensions and the corresponding initial conditions of the two-loop Wilson coefficients in the latter scheme. Finally, we solve the renormalization group equation and give the analytic expressions for the low-energy Wilson coefficients relevant for nonleptonic B meson decays beyond next-to-leading order in both renormalization schemes. (c) 2005 Published by Elsevier B.V. C1 Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Gorbahn, M (reprint author), Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England. EM martin.gorbahn@durham.ac.uk NR 76 TC 119 Z9 120 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 2 PY 2005 VL 713 IS 1-3 BP 291 EP 332 DI 10.1016/j.nuclphysb.2005.01.047 PG 42 WC Physics, Particles & Fields SC Physics GA 920TC UT WOS:000228712000011 ER PT J AU Yamada, N Aoki, S Kuramashi, Y AF Yamada, N Aoki, S Kuramashi, Y TI Perturbative determination of mass-dependent renormalization and improvement coefficients for the heavy-light vector and axial-vector currents with relativistic heavy and domain-wall light quarks SO NUCLEAR PHYSICS B LA English DT Article ID LATTICE GAUGE-THEORY; CHIRAL FERMIONS; QCD; PHYSICS AB We determine the mass-dependent renormalization as well as improvement coefficients for the heavy-light vector and axial-vector currents consisting of the relativistic heavy and the domain-wall light quarks through the standard matching procedure. The calculation is carried out perturbatively at the one-loop level to remove the systematic error of O(alpha(s) (am (Q))(n) a p) as well as O(alpha(s) (am (Q))(n)) (n >= 0), where p is a typical momentum scale in the heavy-light system. We point out that renormalization and improvement coefficients of the heavy-light vector current agree with those of the axial-vector current, thanks to the exact chiral symmetry for the light quark. The results obtained with three different gauge actions, plaquette, Iwasaki and DBW2, are presented as a function of heavy quark mass and domain-wall height. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan. RP Yamada, N (reprint author), Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. EM yamada@bnl.gov RI Kuramashi, Yoshinobu /C-8637-2016 NR 27 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 2 PY 2005 VL 713 IS 1-3 BP 407 EP 437 DI 10.1016/j.nuclphysb.2005.02.012 PG 31 WC Physics, Particles & Fields SC Physics GA 920TC UT WOS:000228712000014 ER PT J AU Gaillard, MK Giedt, J Mints, AL AF Gaillard, MK Giedt, J Mints, AL TI Modular invariant gaugino condensation in the presence of an anomalous U(1) (vol B700, pg 205, 2004) SO NUCLEAR PHYSICS B LA English DT Correction C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. RP Gaillard, MK (reprint author), Univ Calif Berkeley, Dept Phys, 50A5104, Berkeley, CA 94720 USA. EM mkgaillard@lbl.gov NR 1 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD MAY 2 PY 2005 VL 713 IS 1-3 BP 607 EP 608 DI 10.1016/j.nuclphysb.2005.02.015 PG 2 WC Physics, Particles & Fields SC Physics GA 920TC UT WOS:000228712000022 ER PT J AU Williams, BS Kumar, S Hu, Q Reno, JL AF Williams, BS Kumar, S Hu, Q Reno, JL TI Operation of terahertz quantum-cascade lasers at 164 K in pulsed mode and at 117 K in continuous-wave mode SO OPTICS EXPRESS LA English DT Article ID MU-M; TEMPERATURE AB We report the demonstration of a terahertz quantum-cascade laser that operates up to 164 K in pulsed mode and 117 K in continuous-wave mode at approximately 3.0 THz. The active region was based on a resonant-phonon depopulation scheme and a metal-metal waveguide was used for modal confinement. Copper to copper thermocompression wafer bonding was used to fabricate the waveguide, which displayed improved thermal properties compared to a previous indium-gold bonding method. (C) 2005 Optical Society of America. C1 MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA. MIT, Elect Res Lab, Cambridge, MA 02139 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Williams, BS (reprint author), MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA. EM qhu@mit.edu RI Williams, Benjamin/B-4494-2013 OI Williams, Benjamin/0000-0002-6241-8336 NR 20 TC 292 Z9 298 U1 7 U2 44 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1094-4087 J9 OPT EXPRESS JI Opt. Express PD MAY 2 PY 2005 VL 13 IS 9 BP 3331 EP 3339 DI 10.1364/OPEX.13.003331 PG 9 WC Optics SC Optics GA 923FW UT WOS:000228896200017 PM 19495235 ER PT J AU Karner, SL Chester, JS Chester, FM Kronenberg, AK Hajash, A AF Karner, SL Chester, JS Chester, FM Kronenberg, AK Hajash, A TI Laboratory deformation of granular quartz sand: Implications for the burial of clastic rocks SO AAPG BULLETIN LA English DT Article ID PRESSURE SOLUTION; OVERPRESSURE RETARDATION; TECTONIC REGIMES; EFFECTIVE STRESS; FLUID-PRESSURE; POROSITY LOSS; FAILURE MODE; MEXICO BASIN; COMPACTION; SANDSTONES AB We explore the influence of mechanical deformation in natural sands through experiments on water-saturated samples of quartz sand. Stresses, volumetric strain, and microseismicity (or acoustic emission, AE) rates were monitored throughout each test. Deformation of quartz sand at low stresses is accommodated by granular flow without significant grain breakage, whereas at high stresses, granulation and cataclastic flow are dominant. Sands deformed under isotropic conditions show compactive strains with an inverse power-law dependence of macroscopic crushing strength on mean grain size. Triaxial compression at high effective pressures produces compactive strain and a high AE rate associated with considerable particle-size reduction. Triaxial compression at low effective pressure produces dilatant granular flow accommodated by grain boundary frictional sliding and particle rotation. On the basis of experiment results, we predict the evolution of porosity and macroscopic yield strength as a function of depth for extensional and contractional basins. Sand strength increases linearly with depth for shallow burial, whereas for deep burial, strength decreases non-linearly with depth. At subyield stresses, porosity evolves as a function of applied mean stress and is independent of distortional stress. Our predictions are in qualitative agreement with observations of microfracture density obtained from laboratory creep-compaction experiments and with natural sandstones of the Gulf of Mexico basin. Mechanical deformation contributes as much as a 30% increase to fluid pressure evolution, which has particular application to sedimentary systems that display zones of fluid overpressure. Furthermore, deformational strains cannot be fully recovered during uplift, erosion, and unloading of a sedimentary basin. C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Texas A&M Univ, Ctr Tectonophys, Dept Geol & Geophys, College Stn, TX 77843 USA. RP Karner, SL (reprint author), Idaho Natl Engn Lab, POB 1625,Mailstop 2107, Idaho Falls, ID 83415 USA. EM karnsl@inel.gov; chesterj@geo.tamu.edu NR 70 TC 35 Z9 35 U1 2 U2 12 PU AMER ASSOC PETROLEUM GEOLOGIST PI TULSA PA 1444 S BOULDER AVE, PO BOX 979, TULSA, OK 74119-3604 USA SN 0149-1423 J9 AAPG BULL JI AAPG Bull. PD MAY PY 2005 VL 89 IS 5 BP 603 EP 625 DI 10.1306/12200404010 PG 23 WC Geosciences, Multidisciplinary SC Geology GA 920UT UT WOS:000228716300004 ER PT J AU Wenzel, TP Ross, M AF Wenzel, TP Ross, M TI The effects of vehicle model and driver behavior on risk SO ACCIDENT ANALYSIS AND PREVENTION LA English DT Article DE driver fatalities; sport utility vehicles; light trucks; injury risk AB We study the dependence of risk on vehicle type and especially on vehicle model. Here, risk is measured by the number of driver fatalities per year per million vehicles registered. We analyze both the risk to the drivers of each vehicle model and the risk the vehicle model imposes on drivers of other vehicles with which it crashes. The "combined risk" associated with each vehicle model is simply the sum of the risk-to-drivers in all kinds of crashes and the risk-to-drivers-of-other-vehicles in two-vehicle crashes. We find that most car models are as safe to their drivers as most sport utility vehicles (SUVs); the increased risk of a rollover in a SUV roughly balances the higher risk for cars that collide with SUVs and pickup trucks. We find that SUVs and to a greater extent pickup trucks, impose much greater risks than cars on drivers of other vehicles; and these risks increase with increasing pickup size. The higher aggressivity of SUVs and pickups makes their combined risk higher than that of almost all cars. Effects of light truck design on their risk are revealed by the analysis of specific models: new unibody (or "crossover") SUVs appear, in preliminary analysis, to have much lower risks than the most popular truck-based SUVs. Much has been made in the past about the high risk of low-mass cars in certain kinds of collisions. We find there are other plausible explanations for this pattern of risk, which suggests that mass may not be fundamental to safety. While not conclusive, this is potentially important because improvement in fuel economy is a major goal for designers of new vehicles. We find that accounting for the most risky drivers, young males and the elderly, does not change our general results. Similarly, we find with California data that the high risk of rural driving and the high level of rural driving by pickups does not increase the risk-to-drivers of pickups relative to that for cars. However, other more subtle differences in drivers and the driving environment by vehicle type may affect our results. (c) 2005 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Michigan, Ann Arbor, MI 48109 USA. RP Wenzel, TP (reprint author), Lawrence Berkeley Natl Lab, 90R4000,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM tpwenzel@lbl.gov NR 21 TC 41 Z9 42 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0001-4575 J9 ACCIDENT ANAL PREV JI Accid. Anal. Prev. PD MAY PY 2005 VL 37 IS 3 BP 479 EP 494 DI 10.1016/j.aap.2004.08.002 PG 16 WC Ergonomics; Public, Environmental & Occupational Health; Social Sciences, Interdisciplinary; Transportation SC Engineering; Public, Environmental & Occupational Health; Social Sciences - Other Topics; Transportation GA 915ND UT WOS:000228310000012 PM 15784202 ER PT J AU Nugent, KA Peele, AG Quiney, HM Chapman, HN AF Nugent, KA Peele, AG Quiney, HM Chapman, HN TI Diffraction with wavefront curvature: a path to unique phase recovery SO ACTA CRYSTALLOGRAPHICA SECTION A LA English DT Article ID RETRIEVAL ALGORITHMS; X-RAYS; MICROSCOPY; RESOLUTION; OBJECTS; FIELD AB Modern X-ray optics is able to produce very tightly focused beams. The size of these focused spots is comparable to the scale of large molecules and therefore to the lattice spacing of crystals of these molecules. In this case, the phase of the illuminating beam may vary on the scale of the lattice and conventional diffraction theory needs to be modified. In this paper, coherent diffraction by non-planar beams is considered and it is shown that it is possible to uniquely recover the phase of the diffraction pattern. C1 Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. La Trobe Univ, Dept Phys, Bundoora, Vic 3086, Australia. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Nugent, KA (reprint author), Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. EM keithan@unimelb.edu.au RI Chapman, Henry/G-2153-2010; Nugent, Keith/J-2699-2012; Nugent, Keith/I-4154-2016 OI Chapman, Henry/0000-0002-4655-1743; Nugent, Keith/0000-0003-1522-8991; Nugent, Keith/0000-0002-4281-3478 NR 29 TC 29 Z9 29 U1 0 U2 4 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 0108-7673 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD MAY PY 2005 VL 61 BP 373 EP 381 DI 10.1107/S010876730501055X PN 3 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 918LK UT WOS:000228543100010 PM 15846042 ER PT J AU Schultz, AJ Cowan, JA Hitchman, MA Stratemeier, H AF Schultz, AJ Cowan, JA Hitchman, MA Stratemeier, H TI Single-crystal neutron-diffraction study of 3.4% Zn-doped (ND4)(2)[Cu(D2O)(6)](SO4)(2) at 20 K SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID AMMONIUM HEXAAQUACOPPER(II) SULFATE; COPPER(II) TUTTON SALT; JAHN-TELLER DISTORTION; LOW-TEMPERATURE; UNDISTORTED HOST; SOLID-SOLUTIONS; DEPENDENCE; PRESSURE; COMPOUND; EPR AB Doping the perdeuterated ammonium copper Tutton salt (ND4)(2)[Cu(D2O)(6)](SO4)(2) [perdeuterated diammonium hexaaquacopper(II) bis(sulfate)] with Zn leads to a change in the structure from dimorph A (low density) to dimorph B (high density). This change, which accompanies a switch in the direction of the Jahn-Teller distortion, had previously been observed to occur with substitution of Zn2+ at the Cu2+ Site Of between 1.3 (A) and 3.4% (B). In this study, the single-crystal neutron-diffraction analysis of (ND4)(2)[(Cu/Zn)(D2O)(6)](SO4)(2) at 20 K, with 3.4% Zn doping and a deuterium substitution of 85% on the H-atom sites, reveals that the structure is entirely of type B, with the Cu/Zn site at an inversion centre and with no evidence of disorder or unusual atomic displacement parameters that might occur near a phase transition boundary. C1 Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Univ Tasmania, Sch Chem, Hobart, Tas 7001, Australia. RP Schultz, AJ (reprint author), Argonne Natl Lab, Intense Pulsed Neutron Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ajschultz@anl.gov NR 17 TC 2 Z9 2 U1 0 U2 2 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD MAY PY 2005 VL 61 BP M234 EP M236 DI 10.1107/S0108270105009121 PN 5 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 923NA UT WOS:000228915400014 PM 15876707 ER PT J AU Meilleur, F Dauvergne, MT Schlichting, I Myles, DAA AF Meilleur, F Dauvergne, MT Schlichting, I Myles, DAA TI Production and X-ray crystallographic analysis of fully deuterated cytochrome P450cam SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID CELL-DENSITY CULTIVATION; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI; HYDROGEN; DIFFRACTION; RESOLUTION; P450(CAM); DEUTERIUM; WATER; MYOGLOBIN AB Neutron protein crystallography allows H-atom positions to be located in biological structures at the relatively modest resolution of 1.5 - 2.0 angstrom. A difficulty of this technique arises from the incoherent scattering from hydrogen, which considerably reduces the signal-to-noise ratio of the data. This can be overcome by preparing fully deuterated samples. Efficient protocols for routine and low-cost production of in vivo deuterium-enriched proteins have been developed. Here, the overexpression and crystallization of highly (> 99%) deuterium-enriched cytochrome P450cam for neutron analysis is reported. Cytochrome P450cam from Pseudomonas putida catalyses the hydroxylation of camphor from haem-bound molecular O-2 via a mechanism that is thought to involve a proton-shuttle pathway to the active site. Since H atoms cannot be visualized in available X-ray structures, neutron diffraction is being used to determine the protonation states and water structure at the active site of the enzyme. Analysis of both hydrogenated and perdeuterated P450cam showed no significant changes between the X-ray structures determined at 1.4 and 1.7 angstrom, respectively. This work demonstrates that the fully deuterated protein is highly isomorphous with the native ( hydrogenated) protein and is appropriate for neutron protein crystallographic analysis. C1 European Mol Lab Grenoble Outstn, F-38042 Grenoble, France. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. Max Planck Inst Med Res, Abt Biomol Mechanismen, D-69120 Heidelberg, Germany. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Myles, DAA (reprint author), European Mol Lab Grenoble Outstn, 6 Rue Jules Horowitz, F-38042 Grenoble, France. EM meilleur@ill.fr; mylesda@ornl.gov RI Schlichting, Ilme/I-1339-2013; myles, dean/D-5860-2016 OI myles, dean/0000-0002-7693-4964 NR 31 TC 23 Z9 23 U1 1 U2 9 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2005 VL 61 BP 539 EP 544 DI 10.1107/S0907444905003872 PN 5 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 918LQ UT WOS:000228543700006 PM 15858263 ER PT J AU Bennett, BC Meilleur, F Myles, DAA Howell, EE Dealwis, CG AF Bennett, BC Meilleur, F Myles, DAA Howell, EE Dealwis, CG TI Preliminary neutron diffraction studies of Escherichia coli dihydrofolate reductase bound to the anticancer drug methotrexate SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; CRYSTAL-STRUCTURES; LAUE DIFFRACTION; CONCANAVALIN-A; MECHANISTIC IMPLICATIONS; ANGSTROM RESOLUTION; RAMAN-SPECTROSCOPY; BINDING; CRYSTALLOGRAPHY; MUTANT AB The contribution of H atoms in noncovalent interactions and enzymatic reactions underlies virtually all aspects of biology at the molecular level, yet their 'visualization' is quite difficult. To better understand the catalytic mechanism of Escherichia coli dihydrofolate reductase (ecDHFR), a neutron diffraction study is under way to directly determine the accurate positions of H atoms within its active site. Despite exhaustive investigation of the catalytic mechanism of DHFR, controversy persists over the exact pathway associated with proton donation in reduction of the substrate, dihydrofolate. As the initial step in a proof-of-principle experiment which will identify ligand and residue protonation states as well as precise solvent structures, a neutron diffraction data set has been collected on a 0.3 mm(3) D(2)O-soaked crystal of ecDHFR bound to the anticancer drug methotrexate (MTX) using the LADI instrument at ILL. The completeness in individual resolution shells dropped to below 50% between 3.11 and 3.48 angstrom and the I/sigma( I) in individual shells dropped to below 2 at around 2.46 angstrom. However, reflections with I/sigma( I) greater than 2 were observed beyond these limits ( as far out as 2.2 angstrom). To our knowledge, these crystals possess one of the largest primitive unit cells ( P6(1), a = b = 92, c = 73 angstrom) and one of the smallest crystal volumes so far tested successfully with neutrons. C1 Univ Tennessee, Dept Biochem Cellular & Mol Biol, Knoxville, TN 37996 USA. Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France. Oak Ridge Natl Lab, Ctr Struct Mol Biol, Oak Ridge, TN USA. RP Dealwis, CG (reprint author), Univ Tennessee, Dept Biochem Cellular & Mol Biol, Knoxville, TN 37996 USA. EM cdealwis@utk.edu RI myles, dean/D-5860-2016 OI myles, dean/0000-0002-7693-4964 NR 52 TC 10 Z9 10 U1 0 U2 3 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2005 VL 61 BP 574 EP 579 DI 10.1107/S0907444905004804 PN 5 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 918LQ UT WOS:000228543700010 PM 15858267 ER PT J AU Sukumar, N Langan, P Mathews, FS Jones, LH Thiyagarajan, P Schoenborn, BP Davidson, VL AF Sukumar, N Langan, P Mathews, FS Jones, LH Thiyagarajan, P Schoenborn, BP Davidson, VL TI A preliminary time-of-flight neutron diffraction study on amicyanin from Paracoccus denitrificans SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID ELECTRON-TRANSFER COMPLEX; X-RAY DATA; METHYLAMINE DEHYDROGENASE; PROTEIN CRYSTALLOGRAPHY; SPALLATION NEUTRONS; SOFTWARE SUITE; COPPER PROTEIN; QUALITY AB Crystals of the blue copper protein amicyanin suitable for neutron diffraction were grown by the sitting-drop method, followed by repeated macroseeding using solutions prepared with D2O. Although the crystal sizes were the same, crystals grown using solutions made up in H2O in the initial stages of macroseeding and solutions with D2O in later stages did not diffract neutrons well. However, when the protein was initially exchanged with buffered D2O and then crystallized and also macroseeded using solutions made up in D2O throughout, the crystals diffracted neutrons to high resolution. One of those crystals was used to collect a data set to a resolution of 1.9 angstrom. C1 Argonne Natl Lab, NE CAT, Argonne, IL 60439 USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Washington Univ, Sch Med, Dept Biochem & Mol Biophys, St Louis, MO 63110 USA. Univ Mississippi, Med Ctr, Dept Biochem, Jackson, MS 39216 USA. Argonne Natl Lab, IPNS, Argonne, IL 60439 USA. RP Sukumar, N (reprint author), Argonne Natl Lab, NE CAT, Bldg 436, Argonne, IL 60439 USA. EM sukumar@aps.anl.gov RI Langan, Paul/N-5237-2015; OI Langan, Paul/0000-0002-0247-3122; Davidson, Victor/0000-0002-1966-7302 FU NCRR NIH HHS [RR-15301]; NIGMS NIH HHS [GM-41574] NR 24 TC 14 Z9 14 U1 0 U2 3 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAY PY 2005 VL 61 BP 640 EP 642 DI 10.1107/S090744490500541X PN 5 PG 3 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA 918LQ UT WOS:000228543700020 PM 15858277 ER PT J AU Bobev, S Bauer, ED AF Bobev, S Bauer, ED TI CeCu5-xIn1+x [x=0.17 (1)] with the orthorhombic CeCu6 structure SO ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE LA English DT Article AB Large single crystals of the title compound, cerium copper indium, were synthesized from the elements using a eutectic Cu/In mixture as a solvent. CeCu5-xIn1+x [x = 0.17 (1)] is a new ternary derivative of the orthorhombic CeCu6 structure type [ space group Pnma ( No. 62)]. This result differs from that of Kalychak, Baranyak, Belsky & Dmytrakh [Dopl. Akad. Nauk Ukr. RSR Ser. B ( 1988). 9, 39-42], who found that CeCu4.38In1.62 belongs to a new structure type ( space group Pnnm), derived from the parent CeCu6 compound by doubling the a axis. In the present structure, all the atoms, except one of the Cu species, occupy special positions with mirror symmetry. C1 Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bobev, S (reprint author), Univ Delaware, Dept Chem & Biochem, 304A Drake Hall, Newark, DE 19716 USA. EM sbobev@chem.udel.edu RI Bauer, Eric/D-7212-2011 NR 9 TC 4 Z9 4 U1 1 U2 4 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 1600-5368 J9 ACTA CRYSTALLOGR E JI Acta Crystallogr. Sect. E.-Struct Rep. Online PD MAY PY 2005 VL 61 BP I89 EP I90 DI 10.1107/S1600536805012249 PN 5 PG 2 WC Crystallography SC Crystallography GA 922JK UT WOS:000228833300009 ER PT J AU Bobev, S Bauer, ED AF Bobev, S Bauer, ED TI PrCu5-xIn1+x [x=0.24 (1)] with the orthorhombic CeCu6 structure type SO ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE LA English DT Article ID CRYSTAL-STRUCTURE AB Large single crystals of the title compound were synthesized from the corresponding elements using an eutectic Cu/In mixture as a solvent. PrCu5-xIn1+x [x = 0.24 (1)] is a new ternary derivative of the orthorhombic CeCu6 structure type [space group Pnma (No. 62)]. This result contradicts the findings of Kalychak et al. [( 1988). Dop. Akad. Nauk Ukr. RSR Ser. B, 9, 39-42], who found that CeCu4.38In1.62 belongs to a new structure type (space group Pnnm), derived from the parent CeCu6 compound by doubling the a axis. In the present structure, all the atoms except one of the Cu species occupy special positions with mirror symmetry. C1 Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bobev, S (reprint author), Univ Delaware, Dept Chem & Biochem, 304A Drake Hall, Newark, DE 19716 USA. EM sbobev@chem.udel.edu RI Bauer, Eric/D-7212-2011 NR 10 TC 4 Z9 4 U1 1 U2 3 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 1600-5368 J9 ACTA CRYSTALLOGR E JI Acta Crystallogr. Sect. E.-Struct Rep. Online PD MAY PY 2005 VL 61 BP I79 EP I81 DI 10.1107/S1600536805011797 PN 5 PG 3 WC Crystallography SC Crystallography GA 922JK UT WOS:000228833300005 ER PT J AU Bobev, S Bauer, ED AF Bobev, S Bauer, ED TI Ce5AuxGe4-x [x=0.43 (2)] with the orthorhombic Sm5Ge4 structure type SO ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE LA English DT Article AB Single crystals of the title compound, pentacerium gold tetragermanium, were synthesized from the corresponding elements using a eutectic Au/Ge mixture as solvent. Structure determination of a crystal from that reaction revealed the composition Ce(5)AuxGe(4-x) (x = 0.43). The compound is a new ternary derivative of the Sm5Ge4 structure type that crystallizes in the space group Pnma of the orthorhombic system. There are six atoms in the asymmetric unit, one Ce in Wyckoff site 4c, two Ce in 8d, two Ge in 4c and one Ge in 8d. Two of the Ge sites are statistically occupied by Ge and Au atoms, with a lack of long-range ordering. The results are consistent with an earlier report on the structure of the fully stoichiometric analog Ce5Ge4. C1 Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bobev, S (reprint author), Univ Delaware, Dept Chem & Biochem, 304A Drake Hall, Newark, DE 19716 USA. EM sbobev@chem.udel.edu RI Bauer, Eric/D-7212-2011 NR 9 TC 3 Z9 3 U1 1 U2 6 PU BLACKWELL MUNKSGAARD PI FREDERIKSBERG C PA 1 ROSENORNS ALLE, DK-1970 FREDERIKSBERG C, DENMARK SN 1600-5368 J9 ACTA CRYSTALLOGR E JI Acta Crystallogr. Sect. E.-Struct Rep. Online PD MAY PY 2005 VL 61 BP I73 EP I75 DI 10.1107/S160053680501113X PN 5 PG 3 WC Crystallography SC Crystallography GA 922JK UT WOS:000228833300003 ER PT J AU Safarik, DJ Cady, CM Schwarz, RB AF Safarik, DJ Cady, CM Schwarz, RB TI Shear processes in bulk metallic glasses SO ACTA MATERIALIA LA English DT Article DE bulk metallic glass; viscosity; Newtonian and non-Newtonian flow; Deborah number ID HIGH-TEMPERATURE DEFORMATION; NEWTONIAN VISCOUS-FLOW; AMORPHOUS PD40NI40P20; PLASTIC-DEFORMATION; SUPERCOOLED LIQUID; QUASI-CRYSTALS; FREE-VOLUME; MECHANISM; DYNAMICS; FRACTURE AB We investigated Newtonian and non-Newtonian flow in bulk metallic glasses by compressing cube-shape specimens that have a central hole. The hole localized deformation along well-defined shear planes, which enabled us to plastically deform the same volume of the glass specimen along differently oriented glide directions. We found that the glass has a memory of its previous plastic deformation, but this memory is largely independent of the previous glide direction. The transition from Newtonian to non-Newtonian flow is abrupt and occurs at a Deborah number, De = gamma,tau of 0.5, where gamma is the plastic shear strain rate and tau is the relaxation time for the annihilation of the flow defects. This value of De is consistent with that observed at the onset of flow instabilities in Newtonian liquids, which occurs at De approximate to 1. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, MST Div, Struct Property Relat Grp, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, MST Div, Struct Property Relat Grp, Mail stop G755, Los Alamos, NM 87545 USA. EM rxzs@lanl.gov NR 45 TC 25 Z9 25 U1 1 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 EI 1873-2453 J9 ACTA MATER JI Acta Mater. PD MAY PY 2005 VL 53 IS 8 BP 2193 EP 2202 DI 10.1016/j.actamat.2005.01.018 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 922EG UT WOS:000228818600002 ER PT J AU Gerberich, WW Cordill, MJ Mook, WM Moody, NR Perrey, CR Carter, CB Mukheriee, R Girshick, SL AF Gerberich, WW Cordill, MJ Mook, WM Moody, NR Perrey, CR Carter, CB Mukheriee, R Girshick, SL TI A boundary constraint energy balance criterion for small volume deformation SO ACTA MATERIALIA LA English DT Article DE nanoindentation; dislocation; hardness; yield phenomena; surface energy ID STRAIN GRADIENT PLASTICITY; ACTIVATION VOLUME; ACOUSTIC-EMISSION; SINGLE-CRYSTALS; THIN-FILMS; NANOINDENTATION; NANOSTRUCTURES; GEOMETRY; GOLD AB A concept for the deformation resistance of small volumes under contact subjected to displacements in the 2-100 nm regime is proposed. In terms of an energy balance criterion, the external work minus stored elastic energy is consumed by surface energy and plastic energy absorption. The surface energy is interpreted in terms of new area of contact or new area created by slip step emergence or oxide film fracture. The plastic energy absorption is interpreted in terms of dislocation work. As such, this is analogous to a contact mechanics Griffith criterion for the hardness or flow strength of crystalline metals, semiconductors or oxides. Derivations of supporting loads and stresses provided for nanoindenter tips, nanospheres, nanocubes and thin-walled nanoboxes are presented. For comparison, measured hardness and flow strengths of Al, Au, Fe-3%Si, Ti, W and Si nanostructures are reported in the 2100 nm length scale regime. It is proposed that Si and Ti nanospheres experience a minimum in contact resistance as dictated by a balance in surface energy dominance at small contact and dislocation hardening dominance at large contact. The variation of a strength controlling coefficient, g, with material suggests a length scale dependence on shear and/or pressure activation volumes. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Univ Minnesota, Minneapolis, MN 55455 USA. Sandia Natl Labs, Livermore, CA 94550 USA. RP Cordill, MJ (reprint author), Univ Minnesota, 421 Washington Ave SE, Minneapolis, MN 55455 USA. EM cordill@cems.umn.edu RI Carter, C. Barry/E-6478-2010; OI Carter, C. Barry/0000-0003-4251-9102; Cordill, Megan/0000-0003-1142-8312 NR 46 TC 17 Z9 17 U1 0 U2 11 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 PY 2005 VL 53 IS 8 BP 2215 EP 2229 DI 10.1016/j.actamat.2005.01.028 PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 922EG UT WOS:000228818600004 ER PT J AU Krcmar, M Fu, CL Janotti, A Reed, RC AF Krcmar, M Fu, CL Janotti, A Reed, RC TI Diffusion rates of 3d transition metal solutes in nickel by first-principles calculations SO ACTA MATERIALIA LA English DT Article DE substitutional diffusion; ab initio calculation; metal and alloys (nickel) ID SOLID-SOLUTIONS; NI-CO; INTERDIFFUSION; SYSTEMS; FE; CR AB First-principle calculations for the diffusion of 3d transition metal (TM) solutes in nickel demonstrate the existence of a higher diffusion energy barrier for solutes with smaller atomic sizes. The calculations reveal that smaller TM atoms are, actually, among the least compressible due to the formation of incompressible solute-host directional bonds. Magnetism is shown to have a profound effect on the solute diffusion trends across the 3d TM series: the existence of a local minimum in the diffusion energy barrier is accompanied by the occurrence of a maximum in the magnetic moment. The calculated diffusion rates disprove the traditional view that the diffusion of solutes is least rapid when the size misfit with the host is the greatest. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA. Univ British Columbia, Dept Met & Mat Engn, Vancouver, BC V6T 1Z4, Canada. RP Oak Ridge Natl Lab, Met & Ceram Div, POB 2008, Oak Ridge, TN 37831 USA. EM fucl@ornl.gov RI Janotti, Anderson/F-1773-2011 OI Janotti, Anderson/0000-0001-5028-8338 NR 17 TC 39 Z9 39 U1 4 U2 21 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 EI 1873-2453 J9 ACTA MATER JI Acta Mater. PD MAY PY 2005 VL 53 IS 8 BP 2369 EP 2376 DI 10.1016/j.actamat.2005.01.044 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 922EG UT WOS:000228818600017 ER PT J AU Rawn, CJ Schneibel, JH Fu, CL AF Rawn, CJ Schneibel, JH Fu, CL TI Thermal expansion anisotropy and site occupation of the pseudo-binary molybdenum vanadium silicide Mo5Si3-V5Si3 SO ACTA MATERIALIA LA English DT Article DE X-ray diffraction; silicides; thermal expansion AB The coefficients of thermal expansion (CTEs) and atomic site occupation factors were measured for the pseudo-binary molybdenurn-vanadium silicide Mo5Si3 V5Si3. The ratios of the CTEs in the crystallographic c and a directions range from 2.0 for Mo5Si3 to 1.2 for Mo2V3Si3. The metal atoms can occupy chain sites (in the crystallographic c-direction), and non-chain sites. The relatively small V atoms prefer the chain sites in Mo5Si3, Whereas the relatively large Mo atoms prefer the non-chain sites in V5Si3. These site occupation characteristics reduce the thermal expansion in the c-direction and thereby the CTE anisotropy. Ab initio calculations for Mo4VSi3 suggest that, energetically, V prefers the chain sites, while the measurements show that V occupies also non-chain sites. Extrapolation of the experimental results assuming the site-occupation used in the calculations agrees with the theoretical result that the thermal expansion Of Mo4VSi3 is isotropic. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Met & Ceram Div, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Met & Ceram Div, POB 2008, Oak Ridge, TN 37831 USA. EM rawncj@ornl.gov NR 10 TC 14 Z9 14 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 EI 1873-2453 J9 ACTA MATER JI Acta Mater. PD MAY PY 2005 VL 53 IS 8 BP 2431 EP 2437 DI 10.1016/j.actamat.2005.02.005 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 922EG UT WOS:000228818600024 ER PT J AU Duan, RG Roebben, G Vleugels, J Van der Biest, O AF Duan, RG Roebben, G Vleugels, J Van der Biest, O TI In situ formation of Si2N2O and TiN in Si3N4-based ceramic composites SO ACTA MATERIALIA LA English DT Article DE hot pressing; X-ray diffraction; ceramic matrix composites; internal friction; impulse excitation technique ID SILICON OXYNITRIDE CERAMICS; FRACTURE-TOUGHNESS; HIGH-TEMPERATURE; MECHANICAL SPECTROSCOPY; OXIDATION BEHAVIOR; SOLID-SOLUTIONS; SYSTEM GLASSES; NITRIDE; ADDITIVES; NUCLEATION AB Powder mixtures of silicon nitride (Si3N4) With 6 wt%. Y2O3 and containing up to 63 wt% TiO2 were hot-pressed. The obtained ceramics are investigated using high temperature X-ray diffraction, the impulse excitation technique, and scanning electron microscopy. It was found that during hot pressing, the TiO2 additives were converted to TiN, and silicon oxynitride (Si2N2O) was formed. The addition of TiO2 was found to enhance the alpha to beta-Si3N4 conversion during sintering. A decreased thermal expansion of the crystal structure of the beta-Si3N4 phase is observed with increasing TiO2 amount. The influence of the TiO2 content of the powder mixture on the microstructure and mechanical properties of the densified ceramics was elucidated and the observed reaction mechanisms are thermodynamically and kinetically analyzed. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Joint Res Ctr European Commiss, Inst Reference Mat & Measurements, Geel, Belgium. Katholieke Univ Leuven, Dept Met & Mat Engn, B-3001 Heverlee, Belgium. RP Duan, RG (reprint author), Los Alamos Natl Lab, Mail Stop D469,EES-6, Los Alamos, NM 87545 USA. EM rduan@lanl.gov RI Duan, Ren-Guan/D-5190-2011; Vleugels, Jozef/C-8262-2017 OI Vleugels, Jozef/0000-0003-4432-4675 NR 43 TC 15 Z9 16 U1 2 U2 11 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 PY 2005 VL 53 IS 9 BP 2547 EP 2554 DI 10.1016/j.actamat.2005.01.021 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 929GE UT WOS:000229329300002 ER PT J AU Cordill, MJ Moody, NR Bahr, DF AF Cordill, MJ Moody, NR Bahr, DF TI The effects of plasticity on adhesion of hard films on ductile interlayers SO ACTA MATERIALIA LA English DT Article DE adhesion; plasticity; thin films; copper; buckling ID COATING-SUBSTRATE ADHESION; STRESSED THIN-FILMS; MICROWEDGE INDENTATION; INTERFACIAL ADHESION; SCRATCH ADHESION; TANTALUM NITRIDE; MULTILAYER FILMS; FINE LINE; DELAMINATION; FRACTURE AB Adhesion measurements for thin film systems based on buckle driven delaminations, which occurred both spontaneously and induced via nanoindentation, have been used to demonstrate the effects of interlayer plasticity on film adhesion. Tungsten films deposited upon copper and tin films on semiconductor and insulator substrates show that as the hardness of the underlying copper and tin films increases the practical adhesion energy of the interface (W-Cu or W-Sn) decreases. As shear mode loading increases, this effect becomes more pronounced, while the mode I opening fracture energy remains relatively constant for a given film system. Further analysis of the copper surface after the removal of the buckled tungsten film shows a deformation induced plastic zone. The plastic zone extends beyond the original buckle and is responsible for enhancing the effective adhesion energy for these systems. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA. Sandia Natl Labs, Livermore, CA USA. RP Cordill, MJ (reprint author), Univ Minnesota, 421 Washington Ave SE, Minneapolis, MN 55455 USA. EM cordill@cems.umn.edu RI Bahr, David/A-6521-2012; OI Bahr, David/0000-0003-2893-967X; Cordill, Megan/0000-0003-1142-8312 NR 46 TC 27 Z9 27 U1 5 U2 19 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 PY 2005 VL 53 IS 9 BP 2555 EP 2562 DI 10.1016/j.actamat.2005.02.013 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 929GE UT WOS:000229329300003 ER PT J AU Kruzic, JJ Cannon, RM Ager, JW Ritchie, RO AF Kruzic, JJ Cannon, RM Ager, JW Ritchie, RO TI Fatigue threshold R-curves for predicting reliability of ceramics under cyclic loading SO ACTA MATERIALIA LA English DT Article DE ceramics; mechanical properties (fatigue, R-curves, crack bridging) ID CRACK-PROPAGATION BEHAVIOR; TOUGHENED SILICON-CARBIDE; GRAIN-BRIDGING CERAMICS; FRACTURE-RESISTANCE MECHANISM; RAMAN MICROPROBE SPECTROSCOPY; IN-SITU; POLYCRYSTALLINE ALUMINA; ELEVATED-TEMPERATURES; OPENING DISPLACEMENT; MONOLITHIC ALUMINA AB For monolithic, grain-bridging ceramics, the crack-size dependence of the fatigue threshold during bridging zone development presents a difficulty in its application in design. This paper demonstrates how a fatigue threshold R-curve may express this crack-size dependence, analogous to the traditional fracture toughness R-curve, and may be used to predict the endurance limit and retained strength under cyclic loading conditions. Furthermore, the fatigue threshold R-curve may be deduced from the behavior of millimeter-scale, through-thickness, fatigue cracks via an accurately measured crack bridging stress profile. Both an alumina ceramic with large steady-state bridging zones (similar to 2 mm), where the predicted and experimentally measured fatigue threshold R-curves agree well over a range of crack sizes from 0.06 to 7 mm, and a (Y2O3-Mg0)-doped Si3N4 ceramic, where bridging zones are much shorter (similar to 100 mu m), are investigated. The approach provides a useful alternative to performing difficult short-crack fatigue experiments, particularly for materials with small bridging zones. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Oregon State Univ, Dept Mech Engn, Corvallis, OR 97331 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. RP Kruzic, JJ (reprint author), Oregon State Univ, Dept Mech Engn, 204 Rogers Hall, Corvallis, OR 97331 USA. EM kruzicj@engr.orst.edu RI Ritchie, Robert/A-8066-2008; Kruzic, Jamie/M-3558-2014; OI Ritchie, Robert/0000-0002-0501-6998; Kruzic, Jamie/0000-0002-9695-1921; Ager, Joel/0000-0001-9334-9751 NR 71 TC 36 Z9 37 U1 1 U2 15 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 PY 2005 VL 53 IS 9 BP 2595 EP 2605 DI 10.1016/j.actamat.2005.02.018 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 929GE UT WOS:000229329300006 ER PT J AU Mainelis, G Masquelier, D Makarewicz, A Dzenitis, J AF Mainelis, G Masquelier, D Makarewicz, A Dzenitis, J TI Performance characteristics of the aerosol collectors of the autonomous pathogen detection system (APDS) SO AEROSOL SCIENCE AND TECHNOLOGY LA English DT Article ID AIRBORNE MICROORGANISMS; EFFICIENCY; PARTICLES; IMPACTION; EXPOSURE; AGENTS; BOUNCE; AIR AB This research analyzes the physical performance characteristics of the aerosol collectors of the autonomous pathogen detection system (APDS) that was recently developed by the Lawrence Liver-more National Laboratory. The APDS is capable of continuous and fully autonomous monitoring for multiple airborne threat organisms and can be used as part of a monitoring network for urban areas and major public gatherings. The system has already been successfully tested with airborne Bacillus anthracis and Yersinia pestis biowarfare agents. The APDS aerosol collection system consists of a PM-style cap to remove large particles and a low-pressure drop virtual impactor preconcentrator positioned in front of a wetted-wall cyclone. The aerosol collectors operate at flow rates as high as 3750 l/min and collect airborne particles into 4 ml of liquid for subsequent detection. In our tests we determined the overall collection efficiency of the system by measuring the difference between inlet and outlet particle concentrations. The tests were performed with polydisperse oleic acid and monodisperse polystyrene latex (PSL) particles (0.6-3.1 μ m), and for three values of the major air flow rates in the virtual impactor (1760, 2530, and 3300 l/min), two values of the product, or cyclone, How rates (375 and 450 l/min), and two different volumes of collection liquid (4 and 6 ml). We found that the cutoff size (d(50)) of the entire collection system varied from 1.5 to 2.0 μ m when collecting PSL particles, with 3.1 μ m PSL particles being collected with efficiency of approximately 85%. When collecting oleic acid particles the d(50) of the entire system varied from 1.1 to 1.6 μ m. The concentration rates of the aerosol collection system were found to increase with increasing overall collection How rate and approached one million per minute at the highest tested flowrates. Such high concentrating rates and high air sample volumes make the APDS collection system highly suitable for detecting low concentrations of airborne pathogens. C1 Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. RP Mainelis, G (reprint author), Rutgers State Univ, Dept Environm Sci, 14 Coll Farm Rd, New Brunswick, NJ 08901 USA. EM mainelis@envsci.rutgers.edu RI Mainelis, Gediminas/A-9340-2013 OI Mainelis, Gediminas/0000-0002-5837-0413 NR 26 TC 7 Z9 9 U1 0 U2 8 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0278-6826 J9 AEROSOL SCI TECH JI Aerosol Sci. Technol. PD MAY PY 2005 VL 39 IS 5 BP 461 EP 471 DI 10.1080/0278682909690382 PG 11 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 932VT UT WOS:000229583300011 ER PT J AU Spentzos, A Barakos, G Badcock, K Richards, B Wernert, P Schreck, S Raffel, M AF Spentzos, A Barakos, G Badcock, K Richards, B Wernert, P Schreck, S Raffel, M TI Investigation of three-dimensional dynamic stall using computational fluid dynamics SO AIAA JOURNAL LA English DT Article ID TURBULENCE MODELS; PITCHING AIRFOIL; FLOWS; PREDICTION; EQUATION AB Numerical simulation of three-dimensional dynamic stall has been undertaken using computational fluid dynamics. The full Navier-Stokes equations, coupled with a two-equation turbulence model, where appropriate, have been solved on multiblock strucured grids in a time-accurate fashion. Results have neen obtained for wings of square planform and of NACA 0012 section. Efforts have been devoted to the accurate modeling of the flow near the wing tips, which, for this case, were sharp without tip caps. The obtained results revealed the time evolution of the dynamic stall vortex, which, for this case, takes the shape of a capital omega &UOmega; spanning the wing. The obtained results compare well against experimental data both for the surface pressure distribution on the wing and the flow topology. Of significant importance is the interaction between the three-dimensional dynamic stall vortex and the tip vortex. The present results indicate that once the two vortices are formed both appear to originate from the same region, which is located near the leading edge of the tip. The overall configuration of the developed vortical system takes a &UPi;-&UOmega; form. To our knowledge, this is the first detailed numerical study of three-dimensional dynamic stall appearing in the literature. C1 Univ Glasgow, Dept Aerosp Engn, Computat Fluid Dynam Lab, Glasgow G12 8QQ, Lanark, Scotland. French German Res Inst St Louis, Dept Aeromech & Acoust, Wind Tunnel Grp, F-68300 St Louis, France. Natl Renewable Energy Lab, Div Appl Res, Golden, CO 80401 USA. German Aerosp Res Ctr, DLR, Inst Aerodynam & Flow Technol, D-37073 Gottingen, Germany. RP Spentzos, A (reprint author), Univ Glasgow, Dept Aerosp Engn, Computat Fluid Dynam Lab, Glasgow G12 8QQ, Lanark, Scotland. EM gbarakos@aero.gla.ac.uk OI Richards, Bryan/0000-0002-1181-8292 NR 29 TC 40 Z9 42 U1 0 U2 5 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD MAY PY 2005 VL 43 IS 5 BP 1023 EP 1033 DI 10.2514/1.8830 PG 11 WC Engineering, Aerospace SC Engineering GA 923AI UT WOS:000228880600010 ER PT J AU Bustamante, F Enick, RM Killmeyer, RP Howard, BH Rothenberger, KS Cugini, AV Morreale, BD Ciocco, MV AF Bustamante, F Enick, RM Killmeyer, RP Howard, BH Rothenberger, KS Cugini, AV Morreale, BD Ciocco, MV TI Uncatalyzed and wall-catalyzed forward water-gas shift reaction kinetics SO AICHE JOURNAL LA English DT Article DE water-gas shift; kinetics; homogeneous; high-temperature; Inconel((R)); palladium; palladium-copper alloys ID HYDROGEN PERMEANCE; CARBON-MONOXIDE; PALLADIUM; OXIDATION; PD; SURFACES; COPPER; OXYGEN; TEMPERATURES; CU(111) AB The kinetics of the high-temperature (1070-1134 K), low- and high-pressure gas-phase forward water-gas shift reaction (fWGSR) were evaluated in tin empty quartz reactor anti a quartz reactor packed with quartz particles. The power-law expression for the reaction rate was consistent with the Bradford mechanism and was invariant with respect to pressure. The experimental rate constant was lower than that published by Graven and Long, and slightly higher than estimates obtained using the reaction rate expression derived from the Bradford mechanism in conjunction with values of reaction rate constants obtained from the GRI database. Similar experiments conducted using a reactor composed of Inconel (R) 600, a representative reactor shell material, exhibited substantially, enhanced rates of reaction. A simple power-law rate expression was incorporated into a surface-catalyzed plug flow reactor (PFR) model to correlate the results between 600 and 900 K. Palladium and palladium-copper alloy surfaces, representative of hydrogen membranes, were also shown to enhance the fWGSR rate, but not as much its the Inconel (R), 600 surfaces. (c) 2005 American Institute of Chemical Engineers. C1 Univ Pittsburgh, Natl Energy Technol Lab, Dept Chem & Petr Engn, 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. RP Enick, RM (reprint author), Univ Pittsburgh, Natl Energy Technol Lab, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. EM robert.enick@netl.doe.gov NR 43 TC 51 Z9 54 U1 3 U2 22 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 2005 VL 51 IS 5 BP 1440 EP 1454 DI 10.1002/aic.10396 PG 15 WC Engineering, Chemical SC Engineering GA 920KO UT WOS:000228688000013 ER PT J AU Clevestig, P Maljkovic, I Casper, C Carlenor, E Lindgren, S Naver, L Bohlin, AB Fenyo, EM Leitner, T Ehrnst, A AF Clevestig, P Maljkovic, I Casper, C Carlenor, E Lindgren, S Naver, L Bohlin, AB Fenyo, EM Leitner, T Ehrnst, A TI The X4 phenotype of HIV type 1 evolves from R5 in two children of mothers, carrying X4, and is not linked to transmission SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID IMMUNODEFICIENCY-VIRUS TYPE-1; POLYMERASE CHAIN-REACTION; ENVELOPE V3 LOOP; INFECTED CHILDREN; PERINATAL TRANSMISSION; DISEASE PROGRESSION; CORECEPTOR USAGE; CELL TROPISM; EVOLUTION; SEQUENCES AB Previously, we found that emergence of the X4 viral phenotype in HIV-1-infected children was related to the presence of X4 in their mothers (C. H. Casper et al., J Infect Dis 2002; 186: 914-921). Here, we investigated the origin of the X4 phenotype in the child, analyzing two mother-child pairs (Ma-Ca, Mb-Cb) where the mothers carried X4 and their children developed X4 after an initial presence of R5. We used nested polymerase chain reaction of the env V3 region to generate 203 HIV-1 clones for sequencing (Ma, n = 44; Ca, n = 73; Mb, n = 61; Cb, n = 25) from DNA of peripheral blood mononuclear cell (PBMC) lysates, altogether 167 clones, or from cDNA of plasma RNA, 36 clones. PBMC and plasma isolate sequences from each time point enabled us to assign the probable phenotype to clone sequences in a phylogenetic tree. The transmission and evolution were reconstructed using the maximum likelihood method. In mother-child pair Ma-Ca, one maternal R5 isolate clustered with the child's R5 sequences, at the earliest time when R5 was isolated in the child, confirming this as a likely source of the transmitted R5 phenotype. At age 3, an X4 population was present in the child that had evolved from the child's own R5-associated population, clearly distinct from the maternal X4 sequences. The second mother-child pair (Mb-Cb) displayed a similar pattern. Amino acid substitution patterns corroborated the conclusions from the phylogenetic tree. Thus, in both children, the X4 virus developed from their own R5 population, and was not caused by transmission of X4. C1 Karolinska Inst, Ctr Microbiol & Tumor Biol, SE-17177 Stockholm, Sweden. Swedish Inst Invect Dis Control, Dept Clin Virol, SE-17282 Solna, Sweden. Karolinska Inst, Dept Womens & Childrens Hlth, Unit Neonatal Hlth, SE-17177 Stockholm, Sweden. Karolinska Inst, Karolinska Univ Hosp Huddinge, Dept Clin Sci, Div Obstet & Gynecol, SE-17177 Stockholm, Sweden. Karolinska Inst, Karolinska Univ Hosp Huddinge, Dept Clin Sci, Div Pediat, SE-17177 Stockholm, Sweden. Univ Lund Hosp, Dept Med Microbiol Dermatol & Infect, S-22185 Lund, Sweden. Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. Karolinska Inst, Karolinska Univ Hosp Huddinge, Div Clin Virol, Dept Lab Med, SE-17177 Stockholm, Sweden. RP Clevestig, P (reprint author), Karolinska Inst, Ctr Microbiol & Tumor Biol, Box 280, SE-17177 Stockholm, Sweden. EM Peter.Clevestig@mtc.ki.se NR 31 TC 15 Z9 15 U1 0 U2 0 PU MARY ANN LIEBERT INC PI NEW ROCHELLE PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD MAY PY 2005 VL 21 IS 5 BP 371 EP 378 DI 10.1089/aid.2005.21.371 PG 8 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA 936AV UT WOS:000229825700005 PM 15929699 ER PT J AU Thanos, PPK Katana, JM Volkow, ND AF Thanos, PPK Katana, JM Volkow, ND TI Ethanol self-administration is markedly reduced in ethanol preferring (P) rat: Treated with the CB1 antagonist SR 141716 SO ALCOHOLISM-CLINICAL AND EXPERIMENTAL RESEARCH LA English DT Meeting Abstract CT 28th Annual Meeting of the Research-Society-on-Alcoholism CY JUN 25-30, 2005 CL Santa Barbara, CA SP Res Soc Alcoholism C1 Brookhaven Natl Lab, Behav Neuropharmacol Lab, Dept Med, Upton, NY 11973 USA. NIAAA, Lab Neuroimaging, Bethesda, MD 20892 USA. NIDA, Baltimore, MD 21224 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3261 USA SN 0145-6008 J9 ALCOHOL CLIN EXP RES JI Alcoholism (NY) PD MAY PY 2005 VL 29 IS 5 SU S BP 12A EP 12A PG 1 WC Substance Abuse SC Substance Abuse GA 929VY UT WOS:000229375900035 ER PT J AU Nichols, KK Bierman, PR Eppes, MC Caffee, M Finkel, R Larsen, J AF Nichols, KK Bierman, PR Eppes, MC Caffee, M Finkel, R Larsen, J TI Late Quaternary history of the Chemehuevi Mountain piedmont, Mojave Desert, deciphered using Be-10 and Al-26 SO AMERICAN JOURNAL OF SCIENCE LA English DT Article ID SEDIMENT TRANSPORT; COSMOGENIC NUCLIDES; SOUTHERN ARIZONA; CLIMATIC CONTROL; SOIL DEVELOPMENT; EROSION RATES; ALLUVIAL FANS; CALIFORNIA; PEDIMENTS; SURFACES AB We used the cosmogenic nuclides, Be-10 and Al-26, as cosmic-ray dosimeters to track sediment movement across the incised Chemehuevi Mountain piedmont surface. The Piedmont extends 12 km from highland source basins to an ephemeral wash at the toe of the piedmont. Nuclide activity in sediment from steep source basins and from the bedrock pediment allows us to estimate rates of sediment generation and thus the rate at which sediment is supplied to die piedmont from weathering rock. Analysis of amalgamated sediment samples, collected along 4-km-long transects spaced at 1 kin intervals from the mountain front provide context for understanding nuclide activity in sediment samples collected from two soil pits and demonstrate that sediment steadily moves down the channel network. Samples from the two soil pits allow for estimates of sediment deposition rates and thus further illuminate piedmont history. Model results suggest that the Chemehuevi Mountains are eroding about 40 mm ky(-1) whereas the mountain-proximal bedrock pediment and the interpiedmont Saw-tooth Range are eroding more slowly, 10 to 21 mmn ky(-1) and 9.5 mm ky(-1) respectively. Cosmogenic nuclide profiles in two soil pits suggest a complex history of deposition (at rates between 19 to 34 mm ky(-1)) and stability over the past 60 ky. A change in process from sediment deposition to sediment transport occurred distally on the piedmont approximately 8 ky ago, while the mid-piedmont piedmont surface has been stable since the mid-Holocene. The incised Chemehuevi Mountain piedmont is changing at rates similar to planar and uniformly active piedmonts such as those adjacent to the Iron and Granite Mountains. All three piedmonts have average sediment grain velocities of decimeters per year, long-term source basin erosion rates between 35 to 40 mm ky, depositional hiatuses around the Pleistocene-Holocene climatic transition from moister to drier conditions, and Pleistocene deposition rates of 18 to 39 mm ky. Such similarity in piedmont behavior, despite clear differences in morphology and appearance, might suggest large scale geologic and climatic controls on the generation, transport and deposition of sediment in the Mojave Desert. C1 Univ Vermont, Sch Nat Resources, Burlington, VT 05405 USA. Univ Vermont, Dept Geol, Burlington, VT 05405 USA. Univ N Carolina, Dept Geog & Earth Sci, Charlotte, NC 28223 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94405 USA. RP Nichols, KK (reprint author), Skidmore Coll, Dept Geosci, 815 N Broadway, Saratoga Springs, NY 12866 USA. EM knichols@skidmore.edu RI Caffee, Marc/K-7025-2015 OI Caffee, Marc/0000-0002-6846-8967 NR 87 TC 12 Z9 12 U1 0 U2 7 PU AMER JOURNAL SCIENCE PI NEW HAVEN PA YALE UNIV, PO BOX 208109, NEW HAVEN, CT 06520-8109 USA SN 0002-9599 J9 AM J SCI JI Am. J. Sci. PD MAY PY 2005 VL 305 IS 5 BP 345 EP 368 DI 10.2475/ajs.305.5.345 PG 24 WC Geosciences, Multidisciplinary SC Geology GA 985RK UT WOS:000233395700001 ER PT J AU Rosso, KM AF Rosso, KM TI Acceptance of the Mineralogical Society of America Award for 2004 SO AMERICAN MINERALOGIST LA English DT Editorial Material C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Rosso, KM (reprint author), Pacific NW Natl Lab, KB-96, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 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 2005 VL 90 IS 5-6 BP 1026 EP 1026 DI 10.2138/am.2005.339 PG 1 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA 928XN UT WOS:000229305300030 ER PT J AU Canada, TA Beach, DB Xue, ZL AF Canada, TA Beach, DB Xue, ZL TI Optical sensors for the determination of concentrated hydroxide. Characterization of the sensor materials and evaluation of the sensor performance SO ANALYTICAL CHEMISTRY LA English DT Article ID HIGH-ACIDITY DETERMINATION; DUAL-TRANSDUCER APPROACH; CHEMICAL DURABILITY; ZIRCON FORMATION; PH; GLASSES; BASICITY; SYSTEMS; RANGE AB Optical sensors for the determination of highly concentrated bases such as NaOH (1-10 M) and materials to make these sensors have been characterized by X-ray photoelectron spectroscopy, Si-29 solid-state NMR, FT-IR, and measurements of film porosity, surface area, and thickness. The bonding character and composition of the Si-Zr mixed oxides-organic polymer composites were evaluated. These studies suggest that there are Si-O-Zr matrixes in the mixed oxides, and that the Si-O-Zr matrixes contribute to the durability of the base sensors in highly alkaline solutions. The performance of these base sensors has been studied in detail as well. These sensors were stable for approximately 120 days, exhibited short response times (typically < 10 s), and were fully reversible with minimal hysteresis effects in NaOH-ROH-H2O solutions (R = Me, Et, and i-Pr). C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Canada, TA (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. NR 52 TC 9 Z9 11 U1 1 U2 7 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 2005 VL 77 IS 9 BP 2842 EP 2851 DI 10.1021/ac0485839 PG 10 WC Chemistry, Analytical SC Chemistry GA 922ZD UT WOS:000228877500033 PM 15859601 ER PT J AU Reichmuth, DS Shepodd, TJ Kirby, BJ AF Reichmuth, DS Shepodd, TJ Kirby, BJ TI Microchip HPLC of peptides and proteins SO ANALYTICAL CHEMISTRY LA English DT Article ID IN-SITU POLYMERIZATION; LIQUID-CHROMATOGRAPHY; POROUS POLYMER; PHASE SEPARATIONS; AMINO-ACIDS; ELECTROCHROMATOGRAPHY; CHIP; MONOLITHS; MEDIA; FABRICATION AB Rapid microchip reversed-phase HPLC of peptides and proteins at pressure gradients of 12 bar/cm (180 psi/cm) has been performed using a microdevice that integrates subnanoliter on-chip injection and separation with a miniaturized fluorescence detector. Proteins and peptides were separated on a C18 side-chain porous polymer monolith defined by contact lithography, and injection was achieved via a pressure-switchable fluoropolymer valve defined using projection lithography. Preliminary separations of peptide standards and protein mixtures were performed in 40-200 s, and switching between samples with no detectible sample carryover has been performed. The injections and separations were reproducible; the relative standard deviation (RSD) for retention time was 0.03%, and peak area RSD was 3.8%. Sample volumes ranging from 220 to 800 pL could be linearly metered by controlling the pressure injection pulse duration with conventional timing and valving. The current prototype system shows the potential for rapid and autonomous HPLC separations with varying modalities and the potential for direct connection to mass spectrometers at nanospray flow rates. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Kirby, BJ (reprint author), Sibley Sch Mech & Aerosp Engn, 238 Upson Hall, Ithaca, NY 14853 USA. EM bk88@cornell.edu NR 20 TC 63 Z9 67 U1 1 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 2005 VL 77 IS 9 BP 2997 EP 3000 DI 10.1021/ac048358r PG 4 WC Chemistry, Analytical SC Chemistry GA 922ZD UT WOS:000228877500054 PM 15859622 ER PT J AU Budowle, B Schutzer, SE Ascher, MS Atlas, RM Burans, JP Chakraborty, R Dunn, JJ Fraser, CM Franz, DR Leighton, TJ Morse, SA Murch, RS Ravel, J Rock, DL Slezak, TR Velsko, SP Walsh, AC Walters, RA AF Budowle, B Schutzer, SE Ascher, MS Atlas, RM Burans, JP Chakraborty, R Dunn, JJ Fraser, CM Franz, DR Leighton, TJ Morse, SA Murch, RS Ravel, J Rock, DL Slezak, TR Velsko, SP Walsh, AC Walters, RA TI Toward a system of microbial forensics: from sample collection to interpretation of evidence SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID UNITED-STATES; MAD-COW; SARS; BIOTERRORISM; EPIDEMICS C1 Fed Bur Invest, Lab Div, Quantico, VA 22135 USA. Univ Med & Dent New Jersey, New Jersey Med Sch, Dept Med, Newark, NJ 07103 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Louisville, Grad Sch, Louisville, KY 40292 USA. Dept Homeland Secur, Frederick, MD 21703 USA. Univ Cincinnati, Cincinnati, OH 45267 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Inst Genom Res, Rockville, MD 20850 USA. Midwest Res Inst, Frederick, MD 21701 USA. Childrens Hosp Oakland, Res Inst, Oakland, CA 94609 USA. Ctr Dis Control & Prevent, Atlanta, GA 30333 USA. Inst Def Anal, Alexandria, VA 22311 USA. Dept Agr, Orient, NY 11957 USA. New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12201 USA. Intelligence Technol Innovat Ctr, Mclean, VA 22101 USA. RP Budowle, B (reprint author), Fed Bur Invest, Lab Div, 2501 Invest Pkwy, Quantico, VA 22135 USA. EM bruce.budowle@ic.fbi.gov RI Ravel, Jacques/D-2530-2009; OI Ravel, Jacques/0000-0002-0851-2233; Fraser, Claire/0000-0003-1462-2428 NR 19 TC 33 Z9 33 U1 0 U2 7 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 2005 VL 71 IS 5 BP 2209 EP 2213 DI 10.1128/AEM.71.5.2209-2213.2005 PG 5 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 926EH UT WOS:000229105300001 PM 15870301 ER PT J AU Yeager, CM Northup, DE Grow, CC Barns, SM Kuske, CR AF Yeager, CM Northup, DE Grow, CC Barns, SM Kuske, CR TI Changes in nitrogen-fixing and ammonia-oxidizing bacterial communities in soil of a mixed conifer forest after wildfire SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID 16S RIBOSOMAL-RNA; PINE FOREST; GENE-SEQUENCES; MOLECULAR DIVERSITY; PRESCRIBED FIRE; MINERAL SOILS; NITRIC-OXIDE; NIFH GENES; MICROORGANISMS; POPULATIONS AB This study was undertaken to examine the effects of forest fire on two important groups of N-cycling bacteria in soil, the nitrogen-fixing and ammonia-oxidizing bacteria. Sequence and terminal restriction fragment length polymorphism (T-RFLP) analysis of nifH and amoA PCR amplicons was performed on DNA samples from unburned, moderately burned, and severely burned soils of a mixed conifer forest. PCR results indicated that the soil biomass and proportion of nitrogen-fixing and ammonia-oxidizing species was less in soil from the fire-impacted sites than from the unburned sites. The number of dominant nifH sequence types was greater in fire-impacted soils, and nifH sequences that were most closely related to those from the spore-forming taxa Clostridium and Paenibacillus were more abundant in the burned soils. In T-RFLP patterns of the ammonia-oxidizing community, terminal restriction fragments (TRFs) representing amoA cluster 1, 2, or 4 Nitrosospira spp. were dominant (80 to 90%) in unburned soils, while TRFs representing amoA cluster 3A Nitrosospira spp. dominated (65 to 95%) in fire-impacted soils. The dominance of amoA cluster 3A Nitrosospira spp. sequence types was positively correlated with soil pH (5.6 to 7.5) and NH3-N levels (0.002 to 0.976 ppm), both of which were higher in burned soils. The decreased microbial biomass and shift in nitrogen-fixing and ammonia-oxidizing communities were still evident in fire-impacted soils collected 14 months after the fire. C1 Los Alamos Natl Lab, Biosci Div M888, Los Alamos, NM 87545 USA. Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA. RP Kuske, CR (reprint author), Los Alamos Natl Lab, Biosci Div M888, Los Alamos, NM 87545 USA. EM kuske@lanl.gov NR 61 TC 65 Z9 77 U1 4 U2 36 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 2005 VL 71 IS 5 BP 2713 EP 2722 DI 10.1128/AEM.71.5.2713-2722.2005 PG 10 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA 926EH UT WOS:000229105300063 PM 15870363 ER PT J AU Mosier, NS Hendrickson, R Brewer, M Ho, N Sedlak, M Dreshel, R Welch, G Dien, BS Aden, A Ladisch, MR AF Mosier, NS Hendrickson, R Brewer, M Ho, N Sedlak, M Dreshel, R Welch, G Dien, BS Aden, A Ladisch, MR TI Industrial scale-up of pH-controlled liquid hot water pretreatment of corn fiber for fuel ethanol production SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article DE corn fiber; cellulose; ethanol; stillage; degradation products; pretreatment ID PRESSURE COOKING; FERMENTATION; BIOMASS; DEGRADATION; INHIBITORS; SAWDUST; GLUCOSE; XYLOSE AB The Pretreatment of cellulose in corn fiber by liquid hot water at 160 degrees C and a pH above 4.0 dissolved 50% of the fiber in 20 min. The pretreatment also enabled the subsequent complete enzymatic hydrolysis of the remaining polysaccharides to monosaccharides. The carbohydrates dissolved by the pretreatment were 80% soluble oligosaccharides and 20% monosaccharides with < 1% of the carbohydrates lost to degradation products. Only a minimal amount of protein was dissolved, thus enriching the protein content of the undissolved material. Replication of laboratory results in an industrial trial at 43 gallons per minute (163 L/min) of fiber slurry with a residence time of 20 min illustrates the utility and practicality of this approach for pretreating corn fiber. The added costs owing to pretreatment, fiber, and hydrolysis are equivalent to less than $0.84/gal of ethanol produced from the fiber. Minimizing monosaccharide formation during pretreatment minimized the formation of degradation products; hence, the resulting sugars were readily fermentable to ethanol by the recombinant hexose and by pentose-fermenting Saccharomyces cerevisiae 424A(LNH-ST) and ethanologenic Escherichia coli at yields > 90% of theoretical based on the starting fiber. This cooperative effort and first successful trial opens the door for examining the robustness of the pretreatment system under extended run conditions as well as pretreatment of other cellulose-containing materials using water at controlled pH. C1 Purdue Univ, Renewable Resources Engn Lab, W Lafayette, IN 47907 USA. Purdue Univ, Dept Agr & Biol Engn, W Lafayette, IN 47907 USA. Aventine Renewable Energy Inc, Pekin, IL 61554 USA. USDA, NCAUR, Peoria, IL 61604 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Ladisch, MR (reprint author), Purdue Univ, Renewable Resources Engn Lab, 500 Cent Dr, W Lafayette, IN 47907 USA. EM ladisch@purdue.edu OI Dien, Bruce/0000-0003-3863-6664 NR 29 TC 93 Z9 97 U1 4 U2 32 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 2005 VL 125 IS 2 BP 77 EP 97 DI 10.1385/ABAB:125:2:077 PG 21 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA 933RG UT WOS:000229650000001 PM 15858233 ER PT J AU Carpene, E Shinn, M Schaaf, P AF Carpene, E Shinn, M Schaaf, P TI Synthesis of highly oriented TiNx coatings by free-electron laser processing of titanium in nitrogen gas SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID IRRADIATION; NITRIDE; PLASMA; ALLOY AB Titanium substrates were irradiated in pure nitrogen gas by means of a free-electron laser. The treatment resulted in the formation of delta-TiNx coatings, with surface stoichiometry x approximate to 1 and thickness of about 15 mu m. Under specific experimental conditions the nitride phase had a remarkable crystallographic texture with the delta-TiNx(200) planes parallel to the irradiated surface, and well aligned dendrites growing normal to the surface. The mechanism of the dendritic alignment and the origin of the texture correlate with the existence of a solidification front starting at the surface, which is very peculiar for laser surface treatments. This phenomenon is explained with the help of numerical simulations. C1 Univ Gottingen, Zweites Phys Inst, D-37077 Gottingen, Germany. Thomas Jefferson Natl Accelerator Facil, Free Electron Laser Grp, Newport News, VA 23606 USA. RP Schaaf, P (reprint author), Univ Gottingen, Zweites Phys Inst, Friedrich Hund Pl 1, D-37077 Gottingen, Germany. EM pschaaf@uni-goettingen.de RI Carpene, Ettore/A-9162-2013; Schaaf, Peter/B-4934-2009; OI Schaaf, Peter/0000-0002-8802-6621; Carpene, Ettore/0000-0003-3867-8178 NR 26 TC 16 Z9 16 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD MAY PY 2005 VL 80 IS 8 BP 1707 EP 1710 DI 10.1007/s00339-004-3113-0 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 914EG UT WOS:000228207400018 ER PT J AU Boll, RA Malkemus, D Mirzadeh, S AF Boll, RA Malkemus, D Mirzadeh, S TI Production of actinium-225 for alpha particle mediated radioimmunotherapy SO APPLIED RADIATION AND ISOTOPES LA English DT Article DE bismuth-213; actinium-225; radium-225; thorium-229; radiochemical processing; ion exchange chromatography; alpha-radioimmunotherapy; myeloid leukemia ID SOLID TUMORS; IN-VIVO; BI-213; AC-225; GENERATOR; EMITTERS; RADIOTOXICITY; CONSTRUCTS; DAUGHTERS; TOXICITY AB The initial clinical trials for treatment of acute myeloid leukemia have demonstrated the effectiveness of the alpha emitter Bi-213 in killing cancer cells. Bismuth-213 is obtained from a radionuclide generator system from decay of 10-days Ac-225 parent. Recent pre-clinical studies have also shown the potential application of both Bi-213, and the Ac-225 parent radionuclide in a variety of cancer systems and targeted radiotherapy. This paper describes our five years of experience in production of Ac-225 in partial support of the on-going clinical trials. A four-step chemical process, consisting of both anion and cation exchange chromatography, is utilized for routine separation of carrier-free Ac-225 from a mixture of Th-228, Th-229 and Th-232. The separation of Ra and Ac from Th is achieved using the marcoporous anion exchange resin MP1 in 8 M HNO3 media. Two sequential MP1/NO3 columns provide a separation factor of similar to 10(6) for Ra and Ac from Th. The separation of Ac from Ra is accomplished on a low cross-linking cation exchange resin AG50-X4 using 1.2 M HNO3 as eluant. Two sequential AG50/NO3 columns provide a separation factor of similar to 10(2) for Ac from Ra. A 60-day processing schedule has been adopted in order to reduce the processing cost and to provide the highest levels of Ac-225 possible. Over an 8-week campaign, a total of similar to 100 mCi of Ac-225 (similar to 80% of the theoretical yield) is shipped in 5-6 batches, with the first batch typically consisting of similar to 50 mCi. After the initial separation and purification of Ac, the Ra pool is re-processed on a bi-weekly schedule or as needed to provide smaller batches of Ac-225. The averaged radioisotopic purity of the Ac-225 was 99.6 +/- 0.7% with a Ra-225 content of <= 0.6%, and an average Th-229 content of (4(-4)(+5)) x 10(-5)%. (c) 2005 Elsevier Ltd. All rights reserved. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. RP Mirzadeh, S (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, POB 2008,Mail Stop 6229, Oak Ridge, TN 37831 USA. EM mirzadehs@ornl.gov RI Boll, Rose/C-4138-2016 OI Boll, Rose/0000-0003-2507-4834 NR 36 TC 31 Z9 31 U1 4 U2 26 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 2005 VL 62 IS 5 BP 667 EP 679 DI 10.1016/j.apradiso.2004.12.003 PG 13 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 910JC UT WOS:000227926300001 PM 15763472 ER PT J AU Shores, EF AF Shores, EF TI Plutonium oxide benchmark problems for the SOURCES code SO APPLIED RADIATION AND ISOTOPES LA English DT Article ID NEUTRON YIELD; 238PUO2 AB Neutron yields and spectra for nine plutonium oxide (PuO2) compositions were calculated with the SOURCES 4C computer code. In addition to five experimental measurements serving as benchmarks for the SOURCES homogenous option, neutron production information for three postulated oxide compositions is also presented. Spectral information for neutrons originating from spontaneous fission and (alpha,n) reactions with light targets is presented in tabular format for further manipulation. (c) 2005 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Shores, EF (reprint author), Los Alamos Natl Lab, MS F663,POB 1663, Los Alamos, NM 87545 USA. EM eshores@lanl.gov NR 17 TC 1 Z9 1 U1 0 U2 3 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 2005 VL 62 IS 5 BP 699 EP 704 DI 10.1016/j.apradiso.2004.12.002 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 910JC UT WOS:000227926300004 PM 15763475 ER PT J AU Venkataraman, K Baurceanu, R Maroni, VA AF Venkataraman, K Baurceanu, R Maroni, VA TI Characterization of MBa2Cu3O7-x thin films by Raman microspectroscopy SO APPLIED SPECTROSCOPY LA English DT Article DE Raman spectroscopy; Raman microscopy; superconductor; characteristic vibration bands; texture; thin films; phonons ID PULSED-LASER DEPOSITION; COATED CONDUCTORS; LOCAL-STRUCTURE; BUFFER LAYERS; MICRO-RAMAN; YBCO FILMS; SPECTROSCOPY; SUPERCONDUCTORS; YBA2CU3O7-DELTA; QUALITY AB Thin film embodiments of MBa2Cu3O7-x (MBCO, M = yttrium or a rare-earth metal) prepared by several different deposition methods on a variety of substrates were investigated by Raman microspectroscopy. Several of the unique characterization capabilities of Raman spectroscopy in the analysis of MBCO thin films are highlighted by the results of these investigations. The Raman active phonons of the orthorhombic and tetragonal forms of MBCO that are most useful for characterization of textured MBCO films are diagrammed and discussed. A rapid procedure for qualitative texture mapping of MBCO thin films using Raman microscopy techniques is presented, and a new approach for investigating phase separation at the sub-micrometer level in MBCO thin films based on curve resolution of the MBCO Cu2 phonon is described. The assignment of a particular feature often observed in Raman spectra of MBCO films to cation disorder is reinforced by results of a cation substitution study. The depth of penetration of the laser into MBCO films and the type of information that can be obtained by varying the extent of defocusing of the laser are also discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Maroni, VA (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 43 TC 23 Z9 24 U1 1 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 2005 VL 59 IS 5 BP 639 EP 649 DI 10.1366/0003702053945958 PG 11 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA 924MI UT WOS:000228982500009 PM 15969809 ER PT J AU Roth, K Llana, P Westphalen, D Brodrick, J AF Roth, K Llana, P Westphalen, D Brodrick, J TI Automated whole building diagnostics SO ASHRAE JOURNAL LA English DT Article C1 TIAX, HVAC & Refrigerat Technol Sector, Cambridge, MA USA. US DOE, Bldg Technol Program, Washington, DC USA. RP Roth, K (reprint author), TIAX, HVAC & Refrigerat Technol Sector, Cambridge, MA USA. NR 12 TC 5 Z9 5 U1 0 U2 1 PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC, PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2491 J9 ASHRAE J JI ASHRAE J. PD MAY PY 2005 VL 47 IS 5 BP 82 EP 84 PG 3 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA 925JU UT WOS:000229050200017 ER PT J AU Allam, SS Tucker, DL Lee, BC Smith, JA AF Allam, SS Tucker, DL Lee, BC Smith, JA TI A catalog of very isolated galaxies from the Sloan Digital Sky Survey Data Release 1 SO ASTRONOMICAL JOURNAL LA English DT Article DE atlases; catalogs; surveys ID SPECTROSCOPIC TARGET SELECTION; SURVEY PHOTOMETRIC SYSTEM; SAMPLE; ALGORITHM; UNIVERSE AB We present a new catalog of isolated galaxies obtained through an automated systematic search. These 2980 isolated galaxies were found in approximate to 2099 deg(2) of sky in the Sloan Digital Sky Survey Data Release 1 (SDSS DR1) photometry. The selection algorithm, implementing a variation on the criteria developed by Karachentseva in 1973, proved to be very efficient and fast. This catalog will be useful for studies of the general galaxy characteristics. Here we report on our results. C1 New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA. RP Allam, SS (reprint author), New Mexico State Univ, Dept Astron, POB 30001, Las Cruces, NM 88003 USA. OI Tucker, Douglas/0000-0001-7211-5729 NR 44 TC 36 Z9 36 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 2005 VL 129 IS 5 BP 2062 EP 2073 DI 10.1086/428754 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 922AG UT WOS:000228807100002 ER PT J AU White, RL Becker, RH Fan, XH Strauss, MA AF White, RL Becker, RH Fan, XH Strauss, MA TI Hubble Space Telescope Advanced Camera for Surveys observations of the z=6.42 quasar SDSS J1148+5251: A leak in the Gunn-Peterson trough SO ASTRONOMICAL JOURNAL LA English DT Article DE cosmology : observations; early universe; galaxies : formation; intergalactic medium; quasars : absorption lines; quasars : individual (SDSS J1148+5251) ID DIGITAL SKY SURVEY; ALPHA EMISSION-LINES; Z-GREATER-THAN-5.7 QUASARS; INTERGALACTIC MEDIUM; ADDITIONAL QUASARS; NEUTRAL HYDROGEN; HOST GALAXY; REIONIZATION; Z-SIMILAR-TO-6; EVOLUTION AB The Hubble Space Telescope Advanced Camera for Surveys has been used to obtain a narrowband image of the weak emission peak seen at lambda = 7205 angstrom in the Gunn- Peterson Ly beta absorption trough of the highest redshift quasar, SDSS J1148+5251. The emission looks perfectly pointlike; there is no evidence for the intervening galaxy that we previously suggested might be contaminating the quasar spectrum. We derive a more accurate astrometric position for the quasar in the two filters and see no indication of gravitational lensing. We conclude that the light in the Ly beta trough is leaking through two unusually transparent, overlapping windows in the intergalactic medium (IGM) absorption, one in the Ly beta forest at z similar to 6 and one in the Ly alpha forest at z similar to 5. If there are significant optical depth variations on velocity scales small compared with our spectral resolution (similar to 150 km s(-1)), the Ly alpha trough has the potential to become more transparent for a given Ly alpha optical depth because the Ly alpha transmission is extremely sensitive to the most transparent sight lines in the IGM while Ly alpha is sensitive to sight lines with a broader range of optical depths. Such variations can only strengthen our conclusion that the fraction of neutral hydrogen in the IGM increases dramatically at z > 6. We argue that the transmission in the Ly alpha trough is not only a more sensitive measure of the neutral fraction than is Ly alpha but that it also provides a less biased estimator of the neutral hydrogen fraction than does the Ly alpha transmission. C1 Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. RP White, RL (reprint author), Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA. EM rlw@stsci.edu NR 33 TC 31 Z9 31 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 2005 VL 129 IS 5 BP 2102 EP 2107 DI 10.1086/429380 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 922AG UT WOS:000228807100004 ER PT J AU Liebert, J Wickramsinghe, DT Schmidt, GD Silvestri, NM Hawley, SL Szkody, P Ferrario, L Webbink, RF Oswalt, TD Smith, JA Lemagie, MP AF Liebert, J Wickramsinghe, DT Schmidt, GD Silvestri, NM Hawley, SL Szkody, P Ferrario, L Webbink, RF Oswalt, TD Smith, JA Lemagie, MP TI Where are the magnetic white dwarfs with detached, nondegenerate companions? SO ASTRONOMICAL JOURNAL LA English DT Article DE binaries : close; novae, cataclysmic variables; stars : magnetic fields; white dwarfs ID DIGITAL SKY SURVEY; POST-COMMON-ENVELOPE; 1ST DATA RELEASE; X-RAY BINARIES; CATACLYSMIC VARIABLES; CIRCULAR-POLARIZATION; PLANETARY-NEBULAE; RE J0317-853; FIELDS; STARS AB The Sloan Digital Sky Survey has already more than doubled the sample of white dwarfs with spectral classifications, the subset with detached M dwarf companions, and the subset of magnetic white dwarfs. In the course of assessing these new discoveries, we have noticed a curious, unexpected property of the total lists of magnetic white dwarfs and of white dwarf plus main-sequence binaries: there appears to be virtually zero overlap between the two samples! No confirmed magnetic white dwarf has yet been found in such a pairing with a main-sequence star. The same statement can be made for the samples of white dwarf-M dwarf pairs in wide, common proper motion systems. This contrasts with the situation for interacting binaries, in which an estimated 25% of the accreting systems have a magnetic white dwarf primary. Alternative explanations are discussed for the observed absence of magnetic white dwarf-main-sequence pairs, but the recent discoveries of very low accretion rate magnetic binaries pose difficulties for each. A plausible explanation may be that the presence of the companion and the likely large mass and small radius of the magnetic white dwarf ( relative to nonmagnetic degenerate dwarfs) may provide a selection effect against the discovery of the latter in such binary systems. More careful analysis of the existing samples may yet uncover members of this class of binary, and the sample sizes will continue to grow. The question of whether the mass and field distributions of the magnetic primaries in interacting binaries are similar to those of the isolated magnetic white dwarfs ( including those in wider binaries) must also be answered. C1 Univ Arizona, Dept Astron, Tucson, AZ 85721 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Australian Natl Univ, Dept Appl Math, Canberra, ACT 0200, Australia. Univ Washington, Dept Astron, Seattle, WA 98195 USA. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. Florida Inst Technol, Melbourne, FL 32901 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Liebert, J (reprint author), Univ Arizona, Dept Astron, 933 N Cherry Ave, Tucson, AZ 85721 USA. EM liebert@as.arizona.edu; dayal@maths.anu.edu.au; schmidt@as.arizona.edu; nms@astro.washington.edu; slh@astro.washington.edu; szkody@astro.washington.edu; lilia@maths.anu.edu.au; webbink@astro.uiuc.edu; toswalt@fit.edu; jasman@lanl.gov; mlemagie@u.washington.edu NR 67 TC 47 Z9 47 U1 0 U2 4 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 2005 VL 129 IS 5 BP 2376 EP 2381 DI 10.1086/429639 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 922AG UT WOS:000228807100019 ER PT J AU Petrovic, J Langer, N Yoon, SC Heger, A AF Petrovic, J Langer, N Yoon, SC Heger, A TI Which massive stars are gamma-ray burst progenitors? SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : evolution; stars : binaries : close; gamma rays : bursts; stars : rotation; stars : magnetic fields ID ANGULAR-MOMENTUM LOSS; BLACK-HOLE FORMATION; MAIN-SEQUENCE STARS; PRESUPERNOVA EVOLUTION; STELLAR PARAMETERS; CLOSE BINARIES; MODELS; ROTATION; SUPERNOVAE; ACCRETION AB The collapsar model for gamma-ray bursts requires three essential ingredients: a massive core, removal of the hydrogen envelope, and enough angular momentum in the core. We study current massive star evolution models of solar metallicity to determine which massive star physics is capable of producing these ingredients. In particular, we investigate the role of hydrodynamic and magnetic internal angular momentum transport and binary mass and angular momentum transfer. We follow the evolution of rotating single stars and of binary systems that include rotational processes for both stars. Neglecting magnetic fields, we show that the cores of massive single stars can maintain a high specific angular momentum ( j similar to 10(17) cm(2) s(-1)) when evolved with the assumption that mean molecular weight gradient suppresses rotational mixing processes. In binary systems that undergo mass transfer during core hydrogen burning the mass receiving star accretes large amounts of high angular momentum material, leading to a spin-up of the core. We find, however, that this merely compensates for the tidal angular momentum loss due to spin-orbit coupling, which leads to synchronous rotation before the mass transfer event. Therefore the resulting cores do not rotate faster than in single stars. We show that some accreting stars become Wolf-Rayet stars at core helium exhaustion and form CO-cores that are massive enough to form a black hole. We also present models that include magnetic fields generated by differential rotation and we consider the internal angular momentum transport by magnetic torques. Though magnetic single star models are known to develop rather slowly rotating cores with specific angular momenta at the end of the evolution close to those in observed young pulsars ( j similar to 10(14) cm(2) s(-1)), we investigate the capability of magnetic torques to efficiently pump angular momentum into the cores of accreting stars. Despite our finding that this mechanism works, the magnetic coupling of core and envelope after the accreting star ends core hydrogen burning leads to slower rotation ( j similar to 10(15-16) cm(2) s(-1)) than in the non-magnetic case. We conclude that our binary models without magnetic fields can reproduce stellar cores with a high enough specific angular momentum ( j >= 3 x 10(16) cm(2) s(-1)) to produce a collapsar and a GRB. If magnetic torques are included, however, GRBs at near solar metallicity need to be produced in rather exotic binary channels, or current dynamo model overestimates the magnetic torques. But then the problem is that significant angular momentum loss from the iron core either during core collapse or from the proto-neutron star would be required. C1 Univ Utrecht, Sterrekundig Inst, NL-3584 CC Utrecht, Netherlands. Radboud Univ Nijmegen, Astron Inst, NL-6525 ED Nijmegen, Netherlands. Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands. Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. RP Petrovic, J (reprint author), Univ Utrecht, Sterrekundig Inst, Princetonpl 5, NL-3584 CC Utrecht, Netherlands. EM petrovic@astro.ru.nl NR 39 TC 98 Z9 98 U1 1 U2 6 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2005 VL 435 IS 1 BP 247 EP 259 DI 10.1051/0004-6361:20042545 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 920LM UT WOS:000228690500031 ER PT J AU Steenbrugge, KC Kaastra, JS Crenshaw, DM Kraemer, SB Arav, N George, IM Liedahl, DA van der Meer, RLJ Paerels, FBS Turner, TJ Yaqoob, T AF Steenbrugge, KC Kaastra, JS Crenshaw, DM Kraemer, SB Arav, N George, IM Liedahl, DA van der Meer, RLJ Paerels, FBS Turner, TJ Yaqoob, T TI Simultaneous X-ray and UV spectroscopy of the Seyfert galaxy NGC 5548 - II. Physical conditions in the X-ray absorber SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE galaxies : Seyfert; quasars : individual : NGC 5548; galaxies : active; X-rays : galaxies ID ACTIVE GALACTIC NUCLEI; XMM-NEWTON; NGC 5548; BLACK-HOLE; ULTRAVIOLET ABSORBER; COLUMN DENSITY; IONIZED-GAS; NGC-3783; VARIABILITY; CHANDRA AB We present the results from a 500 ks Chandra observation of the Seyfert 1 galaxy NGC 5548. We detect broadened ( full width half maximum = 8000 km s(-1)) emission lines of O VII. and C.. in the spectra, similar to those observed in the optical and UV bands. The source was continuously variable, with a 30% increase in luminosity in the second half of the observation. The gradual increase in luminosity occurred over a timescale of similar to 300 ks. No variability in the warm absorber was detected between the spectra from the first 170 ks and the second part of the observation. The longer wavelength range of the LETGS resulted in the detection of absorption lines from a broad range of ions, in particular of C, N, O, Ne, Mg, Si, S and Fe. The velocity structure of the X- ray absorber is consistent with the velocity structure measured simultaneously in the ultraviolet spectra. We find that the highest velocity outflow component, at - 1040 km s(-1), becomes increasingly important for higher ionization parameters. This velocity component spans at least three orders of magnitude in ionization parameter, producing both highly ionized X- ray absorption lines ( Mg XII, Si XIV) as well as UV absorption lines. A similar conclusion is very probable for the other four velocity components. Based upon our observations, we argue that the warm absorber probably does not manifest itself in the form of photoionized clumps in pressure equilibrium with a surrounding wind. Instead, a model with a continuous distribution of column density versus ionization parameter gives an excellent fit to our data. From the shape of this distribution and the assumption that the mass loss through the wind should be smaller than the accretion rate onto the black hole, we derive upper limits to the solid angle as small as 10(-4) sr. From this we argue that the outflow occurs in density- stratified streamers. The density stratification across the stream then produces the wide range of ionization parameter observed in this source. We determine an upper limit of 0.3 M. yr(-1) for the mass loss from the galaxy due to the observed outflows. C1 SRON, Natl Inst Space Res, NL-3584 CA Utrecht, Netherlands. Georgia State Univ, Dept Phys & Astron, Astron Off, Atlanta, GA 30303 USA. Catholic Univ Amer, Washington, DC 20064 USA. NASA, Goddard Space Flight Ctr, Astron & Solar Phys Lab, Greenbelt, MD 20771 USA. Univ Colorado, CASA, Boulder, CO 80309 USA. Univ Maryland Baltimore Cty, Joint Ctr Astrophys, Baltimore, MD 21250 USA. NASA, Goddard Space Flight Ctr, High Energy Astrophys Lab, Greenbelt, MD 20771 USA. Lawrence Livermore Natl Lab, Dept Phys, Livermore, CA 94550 USA. Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. RP Steenbrugge, KC (reprint author), SRON, Natl Inst Space Res, Sorbonnelaan 2, NL-3584 CA Utrecht, Netherlands. EM K.C.Steenbrugge@sron.nl NR 43 TC 98 Z9 99 U1 0 U2 1 PU E D P SCIENCES PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD MAY PY 2005 VL 434 IS 2 BP 569 EP U6 DI 10.1051/0004-6361:20047138 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 915SO UT WOS:000228326900017 ER PT J AU Aggouras, G Anassontzis, EG Ball, AE Bourlis, G Chinowsky, W Fahrun, E Grammatikakis, G Green, C Grieder, P Katrivanos, P Koske, P Leisos, A Markopoulos, E Minkowsky, P Nygren, D Papageorgiou, K Przybylski, G Resvanis, LK Siotis, I Sopher, J Staveris-Polikalas, A Tsagli, V Tsirigotis, A Zhukov, VA AF Aggouras, G Anassontzis, EG Ball, AE Bourlis, G Chinowsky, W Fahrun, E Grammatikakis, G Green, C Grieder, P Katrivanos, P Koske, P Leisos, A Markopoulos, E Minkowsky, P Nygren, D Papageorgiou, K Przybylski, G Resvanis, LK Siotis, I Sopher, J Staveris-Polikalas, A Tsagli, V Tsirigotis, A Zhukov, VA TI A measurement of the cosmic-ray muon flux with a module of the NESTOR neutrino telescope SO ASTROPARTICLE PHYSICS LA English DT Article DE neutrino; telescope; deep-sea; NESTOR; muon flux ID DETECTOR AB A module of the NESTOR underwater neutrino telescope was deployed at a depth of 3800 m in order to test the overall detector performance and particularly that of the data acquisition systems. A prolonged period of running under stable operating conditions made it possible to measure the cosmic ray muon flux, I-0 (.) cos(α)(θ), as a function of the zenith angle θ. Measured values of index α and the vertical intensity I-0 (Graphics) are in good agreement with previous measurements and phenomenological predictions. © 2005 Elsevier B.V. All rights reserved. C1 Univ Athens, Dept Phys, GR-15771 Athens, Greece. Univ Bern, Inst Phys, CH-3012 Bern, Switzerland. Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland. CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland. Univ Crete, Dept Phys, Iraklion, Greece. Hellen Open Univ, Sch Sci & Technol, Patras, Greece. Univ Kiel, Inst Expt & Appl Phys, D-24098 Kiel, Germany. Lawrence Berkeley Natl Lab, Berkeley, CA USA. NCSR Demokritos, GR-15310 Athens, Greece. NESTOR Inst Deep Sea Res, Pylos, Greece. Russian Acad Sci, Inst Nucl Res, Moscow, Russia. RP Anassontzis, EG (reprint author), Univ Athens, Dept Phys, Panepistimioupolis, GR-15771 Athens, Greece. EM eanason@cc.uoa.gr RI Grammatikakis, George/F-5620-2017 NR 25 TC 65 Z9 68 U1 1 U2 6 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 2005 VL 23 IS 4 BP 377 EP 392 DI 10.1016/j.astropartphys.2005.02.001 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 923WD UT WOS:000228939200003 ER PT J AU Ulmer, MP Adami, C Covone, G Durret, F Neto, GBL Sabirli, K Holden, B Kron, RG Romer, AK AF Ulmer, MP Adami, C Covone, G Durret, F Neto, GBL Sabirli, K Holden, B Kron, RG Romer, AK TI Cl 1205+44: A fossil group at z=0.59 SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : clusters : individual (Cl 1205+44); X-rays : individual (Cl 1205+44) ID LUMINOSITY-TEMPERATURE RELATION; X-RAY-PROPERTIES; MULTIWAVELENGTH OBSERVATIONS; GALAXY GROUPS; CLUSTER; EVOLUTION; RADIO; POPULATIONS; ABUNDANCES; EMISSION AB This is a report of Chandra, XMM-Newton, Hubble Space Telescope, and Astrophysical Research Consortium telescope observations of an extended X-ray source at z = 0.59. The apparent member galaxies range from spiral to elliptical, and are all relatively red (i' - K-s about 3). We interpret this object to be a fossil group based on the difference between the brightness of the first and second brightest cluster members in the i' band, and because the rest-frame bolometric X-ray luminosity is about 9.2 x 10(43) h(70)(-2) 70 ergs s(-1). This makes Cl 1205+ 44 the highest redshift fossil group yet reported. The system also contains a central double-lobed radio galaxy that appears to be growing via the accretion of smaller galaxies. We discuss the formation and evolution of fossil groups in light of the high redshift of Cl 1205+ 44. C1 Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA. Lab Astrophys Marseille, F-13012 Marseille, France. CNRS, Inst Astrophys Paris, F-75014 Paris, France. Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo, Brazil. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ulmer, MP (reprint author), Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA. EM m-ulmer2@northwestern.edu; christophe.adami@oamp.fr; giovanni.covone@oamp.fr; durret@iap.fr; gastao@astro.iag.usp.br; sabirli@sussex.ac.uk; holden@ucolick.org; rich@oddjob.uchicago.edu; romer@sussex.ac.uk RI Lima Neto, Gastao/J-6117-2014; Covone, Giovanni/J-6040-2012 OI Covone, Giovanni/0000-0002-2553-096X NR 38 TC 29 Z9 29 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 1 PY 2005 VL 624 IS 1 BP 124 EP 134 DI 10.1086/428710 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 918OI UT WOS:000228554200015 ER PT J AU Endeve, E Lie-Svendsen, O Hansteen, VH Leer, E AF Endeve, E Lie-Svendsen, O Hansteen, VH Leer, E TI Release of helium from closed-field regions of the Sun SO ASTROPHYSICAL JOURNAL LA English DT Article DE solar wind; Sun : abundances; Sun : chromosphere; Sun : corona ID R-CIRCLE-DOT; SOLAR-WIND; MAGNETOHYDRODYNAMIC MODELS; CORONA; STREAMER; DYNAMICS; ABUNDANCE AB Using a numerical model that extends from the chromosphere into the supersonic solar wind, we study the dynamics of previously closed coronal flux tubes that open, allowing plasma to be expelled from the corona. In particular, we study whether the opening of flux tubes may provide a source of helium-rich material for the solar wind. We use higher order moment fluid equations to describe the plasma, which consists of hydrogen ( neutral and protons), helium( neutral, singly ionized, and alpha-particles), and electrons. The helium abundance decreases rapidly with altitude in a closed flux tube, caused by the collisional coupling between alpha-particles and protons leading to a small alpha-particle scale height. When the flux tube is rapidly opened, protons escape from the Sun immediately. The coronal alpha-particles leave the corona only much later, 10 - 20 hr after the protons, when the collisional coupling to protons has eased, allowing their temperature to become sufficiently high for them to escape. C1 Univ Oslo, Inst Theoret Astrophys, NO-0315 Oslo, Norway. Norwegian Def Res Estab, NO-2027 Kjeller, Norway. Univ Oslo, Ctr Math Applicat, Oslo, Norway. Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80307 USA. RP Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM eirik.endeve@astro.uio.no; oystein.lie-svendsen@ffi.no; viggo.hansteen@astro.uio.no; egil.leer@astro.uio.no OI Endeve, Eirik/0000-0003-1251-9507 NR 23 TC 7 Z9 7 U1 1 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 2005 VL 624 IS 1 BP 402 EP 413 DI 10.1086/428938 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 918OI UT WOS:000228554200039 ER PT J AU Roubertoux, PL Bichler, Z Pinoteau, W Seregaza, Z Fortes, S Jamon, M Smith, DJ Rubin, E Migliore-Samour, D Carlier, M AF Roubertoux, PL Bichler, Z Pinoteau, W Seregaza, Z Fortes, S Jamon, M Smith, DJ Rubin, E Migliore-Samour, D Carlier, M TI Functional analysis of genes implicated in Down syndrome: 2. Laterality and corpus callosum size in mice transpolygenic for Down syndrome chromosomal region-1 (DCR-1) SO BEHAVIOR GENETICS LA English DT Article DE Corpus callosum; Down syndrome; Down syndrome critical region-1; laterality; mouse model of Down syndrome ID TRANSGENIC MICE; STRUCTURAL ASYMMETRIES; BEHAVIORAL LATERALITY; MENTAL-RETARDATION; HAND PREFERENCE; MOUSE MODEL; BRAIN SIZE; HANDEDNESS; EXPRESSION; AGE AB The association between atypical laterality and mental retardation has been reported several times, particularly in Down syndrome (DS). We investigated common genetic correlates of these components of the syndrome, examining direction (number of right paw entries in the Collins test) and degree (absolute difference between the number of right paw entries and the number of left paw entries) in mice that had incorporated extra-contiguous HSA21 fragments covering DCR-1 (Down Chromosomal Region-1). As corpus callosum size is substantially reduced in DS, and as the structure has been suspected of playing a role in atypical laterality, we also measured the corpus callosum in these mice. Extra copies of two regions (F7 and E6) have been associated with an atypical degree of laterality (strongly reduced degree). Extra copies of E8, G6 and E6 are also linked to the reduced size of the corpus callosum, indicating that the abnormal number of fibers linking the two hemispheres is not associated with atypical laterality in DS. Together, these results indicate that some of the genes involved in atypical laterality and in the reduced size of the corpus callosum in DS are present on DCR-1. An extra copy of F7 and, to a lesser extent, an extra copy of E6, are also associated with cognitive impairment. These results support the hypothesis of common genetic correlates in atypical laterality and mental retardation in DS. C1 CNRS, UMR, F-13402 Marseille, France. Ruhr Univ Bochum, D-4630 Bochum, Germany. Univ Calif Los Angeles, Sch Med, Dept Mol & Med Pharmacol, Los Angeles, CA 90095 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Genome Sci Dept, Berkeley, CA 94720 USA. Univ Aix Marseille 1, F-13331 Marseille, France. Inst Univ France, Paris, France. RP Roubertoux, PL (reprint author), CNRS, UMR, P3M,31 Chemin Joseph Aiguier, F-13402 Marseille, France. EM rouber@dpm.cnrs-mrs.fr NR 56 TC 11 Z9 11 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0001-8244 J9 BEHAV GENET JI Behav. Genet. PD MAY PY 2005 VL 35 IS 3 BP 333 EP 341 DI 10.1007/s10519-005-3225-0 PG 9 WC Behavioral Sciences; Genetics & Heredity; Psychology, Multidisciplinary SC Behavioral Sciences; Genetics & Heredity; Psychology GA 922TJ UT WOS:000228861200011 PM 15864448 ER PT J AU Paul-Pletzer, K Yamamoto, T Ikemoto, N Jimenez, LS Morimoto, H Williams, PG Ma, JJ Parness, J AF Paul-Pletzer, K Yamamoto, T Ikemoto, N Jimenez, LS Morimoto, H Williams, PG Ma, JJ Parness, J TI Probing a putative dantrolene-binding site on the cardiac ryanodine receptor SO BIOCHEMICAL JOURNAL LA English DT Article DE [H-3]azidodantrolene; calcium; dantrolene; malignant hyperthermia; photoaffinity labelling; ryanodine receptor ID CA2+ RELEASE CHANNELS; SARCOPLASMIC-RETICULUM; SKELETAL-MUSCLE; CALCIUM-RELEASE; MALIGNANT HYPERTHERMIA; RAT MYOCARDIUM; DEATH; HEART; IDENTIFICATION; CALSEQUESTRIN AB Dantrolene is an inhibitor of intracellular Ca2+ release from skeletal muscle SR (sarcoplasmic reticulum). Direct photoaffinity labelling experiments using [H-3]azidodantrolene and synthetic domain peptides have demonstrated that this drug targets amino acids 590-609 [termed DP1 (domain peptide 1)] of RyR1 (ryanodine receptor 1), the skeletal muscle RyR isoform. Although the identical sequence exists in the cardiac isoform, RyR2 (residues 601-620), specific labelling of RyR2 by dantrolene has not been demonstrated, even though some functional studies show protective effects of dantrolene on heart function. Here we test whether dantrolene-active domains exist within RyR2 and if so, whether this domain can be modulated. We show. that elongated DP1 sequences from RyR1 (DP1-2s; residues 590-628) and RyR2 (DP1-2c; residues 601-639) can be specifically photo-labelled by [H-3]azidodantrolene. Monoclonal anti-RyR1 antibody, whose epitope is the DP1 region, can recognize RyR1 but not RyR2 in Western blot and immunoprecipitation assays, yet it recognizes both DP1-2c and DP1-2s. This suggests that although the RyR2 sequence has an intrinsic capacity to bind dantrolene in vitro, this site may be poorly accessible in the native channel protein. To examine whether it is possible to modulate this site, we measured binding of [H-3]dantrolene to cardiac SR as a function of free Ca2+. We found that &GE; 10 mM EGTA increased [H-3]dantrolene binding to RyR2 by &SIM; 2-fold. The data suggest that the dantrolene-binding site on RyR2 is conformationally sensitive. This site may be a potential therapeutic target in cardiovascular diseases sensitive to dysfunctional intracellular Ca2+ release. C1 Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Anesthesia, Piscataway, NJ 08854 USA. Boston Biomed Res Inst, Watertown, MA 02472 USA. Rutgers State Univ, Dept Chem, Piscataway, NJ 08854 USA. Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Physiol & Biophys, Piscataway, NJ 08854 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Tritium Labelling Facil, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Pharmacol, Piscataway, NJ 08854 USA. Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Pediat, Piscataway, NJ 08854 USA. RP Parness, J (reprint author), Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Anesthesia, Staged Res Annex 2,Room 108, Piscataway, NJ 08854 USA. EM parness@umdnj.edu FU NCRR NIH HHS [P41 RR01237, P41 RR001237]; NHLBI NIH HHS [HL072841, R01 HL-69000, R01 HL069000, R01 HL072841]; NIA NIH HHS [R01 AG-15556, R01 AG015556]; NIAMS NIH HHS [R01 AR016922, R01 AR045593, R01 AR16922, R01 AR45593] NR 44 TC 34 Z9 36 U1 0 U2 5 PU PORTLAND PRESS LTD PI LONDON PA THIRD FLOOR, EAGLE HOUSE, 16 PROCTER STREET, LONDON WC1V 6 NX, ENGLAND SN 0264-6021 J9 BIOCHEM J JI Biochem. J. PD MAY 1 PY 2005 VL 387 BP 905 EP 909 DI 10.1042/BJ20041336 PN 3 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 926PR UT WOS:000229135600040 PM 15656791 ER PT J AU Mahony, S Hendrix, D Golden, A Smith, TJ Rokhsar, DS AF Mahony, S Hendrix, D Golden, A Smith, TJ Rokhsar, DS TI Transcription factor binding site identification using the self-organizing map SO BIOINFORMATICS LA English DT Article ID BIOLOGICAL SEQUENCES; DISCOVERY; GENES; DICTIONARY; PATTERNS; GENOMES AB Motivation: The automatic identification of over-represented motifs present in a collection of sequences continues to be a challenging problem in computational biology. In this paper, we propose a self-organizing map of position weight matrices as an alternative method for motif discovery. The advantage of this approach is that it can be used to simultaneously characterize every feature present in the dataset, thus lessening the chance that weaker signals will be missed. Features identified are ranked in terms of over-representation relative to a background model. Results: We present an implementation of this approach, named SOMBRERO (self-organizing map for biological regulatory element recognition and ordering), which is capable of discovering multiple distinct motifs present in a single dataset. Demonstrated here are the advantages of our approach on various datasets and SOMBRERO's improved performance over two popular motif-finding programs, MEME and AlignACE. C1 NUI Galway, Natl Ctr Biomed Engn Sci, Galway, Ireland. NUI Galway, Dept Informat Technol, Galway, Ireland. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Ctr Integrat Genom, Berkeley, CA 94720 USA. Joint Genome Inst, Walnut Creek, CA 94598 USA. RP Mahony, S (reprint author), NUI Galway, Natl Ctr Biomed Engn Sci, Galway, Ireland. EM shaun.mahony@nuigalway.ie RI Mahony, Shaun/C-5699-2014; OI Mahony, Shaun/0000-0002-2641-1807; Smith, Terry/0000-0002-4956-3299 NR 19 TC 43 Z9 49 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD MAY 1 PY 2005 VL 21 IS 9 BP 1807 EP 1814 DI 10.1093/bioinformatics/bti256 PG 8 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 921RS UT WOS:000228783000009 PM 15647296 ER PT J AU Song, J Xu, Y White, S Miller, KWP Wolinsky, M AF Song, J Xu, Y White, S Miller, KWP Wolinsky, M TI SNPsFinder - a web-based application for genome-wide discovery of single nucleotide polymorphisms in microbial genomes SO BIOINFORMATICS LA English DT Article ID MYCOBACTERIUM-TUBERCULOSIS; PATHOGENS; GENE AB Single nucleotide polymorphisms (SNPs) are the most abundant form of genetic variations in closely related microbial species, strains or isolates. Some SNPs confer selective advantages for microbial pathogens during infection and many others are powerful genetic markers for distinguishing closely related strains or isolates that could not be distinguished otherwise. To facilitate SNP discovery in microbial genomes, we have developed a web-based application, SNPsFinder, for genome-wide identification of SNPs. SNPsFinder takes multiple genome sequences as input to identify SNPs within homologous regions. It can also take contig sequences and sequence quality scores from ongoing sequencing projects for SNP prediction. SNPsFinder will use genome sequence annotation if available and map the predicted SNP regions to known genes or regions to assist further evaluation of the predicted SNPs for their functional significance. SNPsFinder can generate PCR primers for all predicted SNP regions according to user's input parameters to facilitate experimental validation. The results from SNPsFinder analysis are accessible through the World Wide Web. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. Fed Bur Invest Acad, Counterterrorism & Forens Sci Res Unit, Quantico, VA 22135 USA. RP Wolinsky, M (reprint author), Los Alamos Natl Lab, Biosci Div, POB 1663, Los Alamos, NM 87545 USA. EM murray@lanl.gov NR 10 TC 16 Z9 16 U1 0 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD MAY 1 PY 2005 VL 21 IS 9 BP 2083 EP 2084 DI 10.1093/bioinformatics/bti176 PG 2 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 921RS UT WOS:000228783000042 PM 15691853 ER PT J AU Nalla, RK Kruzic, JJ Kinney, JH Ritchie, RO AF Nalla, RK Kruzic, JJ Kinney, JH Ritchie, RO TI Aspects of in vitro fatigue in human cortical bone: time and cycle dependent crack growth SO BIOMATERIALS LA English DT Article DE cortical bone; fatigue; fracture; life prediction ID FRACTURE-MECHANICS; DAMAGE ACCUMULATION; CUMULATIVE DAMAGE; HUMAN DENTIN; MICRODAMAGE; PROPAGATION; BEHAVIOR; SPECIMENS; STRENGTH; TISSUE AB Although fatigue damage in bone induced by cyclic loading has been recognized as a problem of clinical significance, few fracture mechanics based studies have investigated how incipient cracks grow by fatigue in this material. In the present study, in vitro cyclic fatigue experiments were performed in order to quantify fatigue-crack growth behavior in human cortical bone. Crack-growth rates spanning five orders of magnitude were obtained for the extension of macroscopic cracks in the proximal-distal direction: growth-rate data could be well characterized by the linear-elastic stress-intensity range. using a simple (Paris) power law with exponents ranging from 4.4 to 9.5. Mechanistically, to discern whether such behavior results from "true" cyclic fatigue damage or is simply associated with a succession of quasi-static fracture events, cyclic crack-growth rates were compared to those measured under sustained (non-cyclic) loading. Measured fatigue-crack growth rates were found to exceed those "predicted" front the sustained load data at low growth rates (similar to3 x 10(-10) to 5 x 10(-7) m/cycle), suggesting that a "true" cyclic fatigue mechanism. such as alternating blunting and re-sharpening of the crack tip, is active in bone. Conversely. at higher growth rates (similar to5 x 10(-7) to 3 x 10(-5) m/cycle). the crack-growth data under sustained loads integrated over the loading cycle reasonably predicts the cyclic fatigue data. indicating that quasi-static fracture mechanisms predominate. The results are discussed in light of the occurrence of fatigue-related stress fractures in cortical bone. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Div Mat Sci, Lawerence Berkeley Natl Lab, Berkeley, CA 94720 USA. Lawerence Livermore Natl Lab, Livermore, CA 94550 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 54 TC 29 Z9 33 U1 0 U2 9 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0142-9612 J9 BIOMATERIALS JI Biomaterials PD MAY PY 2005 VL 26 IS 14 BP 2183 EP 2195 DI 10.1016/j.biomaterials.2004.05.024 PG 13 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA 892PZ UT WOS:000226663800061 PM 15576194 ER PT J AU Asthagiri, D Paliwal, A Abras, D Lenhoff, AM Paulaitis, ME AF Asthagiri, D Paliwal, A Abras, D Lenhoff, AM Paulaitis, ME TI A consistent experimental and modeling approach to light-scattering studies of protein-protein interactions in solution SO BIOPHYSICAL JOURNAL LA English DT Article ID DIELECTRIC-PROPERTIES; MOLECULAR-DYNAMICS; LYSOZYME; CHARGE AB The osmotic second virial coefficient, B-2, obtained by light scattering from protein solutions has two principal components: the Donnan contribution and a contribution due to protein-protein interactions in the limit of infinite dilution. The Donnan contribution accounts for electroneutrality in a multicomponent solution of ( poly) electrolytes. The importance of distinguishing this ideal contribution to B-2 is emphasized, thereby allowing us to model the interaction part of B-2 by molecular computations. The model for protein-protein interactions that we use here extends earlier work (Neal et al., 1998) by accounting for long-range electrostatic interactions and the specific hydration of the protein by strongly associated water molecules. Our model predictions are compared with measurements of B-2 for lysozyme at 25 degrees C over pH from 5.0 to 9.0, and 7-60 mM ionic strength. We find that B-2 is positive at all solution conditions and decreases with increasing ionic strength, as expected, whereas the interaction part of B-2 is negative at all conditions and becomes progressively less negative with increasing ionic strength. Although long-range electrostatic interactions dominate this contribution, particularly at low ionic strength, short-range electrostatic/dispersion interactions with specific hydration are essential for an accurate description of B-2 derived from experiment. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. Johns Hopkins Univ, Dept Chem & Biomol Engn, Baltimore, MD 21218 USA. Univ Delaware, Dept Chem Engn, Newark, DE 19716 USA. RP Paulaitis, ME (reprint author), Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA. EM paulaitis.1@osu.edu RI Asthagiri, Dilipkumar/A-3383-2010; Asthagiri, Dilipkumar/P-9450-2016; OI Asthagiri, Dilipkumar/0000-0001-5869-0807; Lenhoff, Abraham/0000-0002-7831-219X NR 34 TC 39 Z9 41 U1 0 U2 5 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD MAY PY 2005 VL 88 IS 5 BP 3300 EP 3309 DI 10.1529/biophysj.104.058859 PG 10 WC Biophysics SC Biophysics GA 920KW UT WOS:000228688800025 PM 15792969 ER PT J AU Collins, BS Sharitz, RR Coughlin, DP AF Collins, BS Sharitz, RR Coughlin, DP TI Elemental composition of native wetland plants in constructed mesocosm treatment wetlands SO BIORESOURCE TECHNOLOGY LA English DT Article DE constructed treatment wetlands; acid coal runoff; planted treatment wetlands ID ACID-MINE DRAINAGE; AQUATIC MACROPHYTES; METAL ACCUMULATION; EFFLUENT; AMMONIA; SYSTEMS; GROWTH; ZN; MN; FE AB Plants that accumulate a small percentage of metals in constructed treatment wetlands can contribute to remediation of acidic, metal contaminated runoff waters from coal mines or processing areas. We examined root and shoot concentrations of elements in four perennial wetland species over two seasons in mesocosm wetland systems designed to remediate water from a coal pile runoff basin. Deep wetlands in each system contained Myriophyllum aquaticum and Nymphaea odorata; shallow wetlands contained Juncus effusus and Pontederia cordata. Shoot elemental concentrations differed between plants of deep and shallow wetlands, with higher Zn, Al, and Fe concentrations in plants in shallow wetlands and higher Na, Mn, and P concentrations in plants in deep wetlands. Root and shoot concentrations of most elements differed between species in each wetland type. Over two seasons, these four common wetland plants did help remediate acidic, metal-contaminated runoff from a coal storage pile. (C) 2004 Elsevier Ltd. All rights reserved. C1 Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Collins, BS (reprint author), Savannah River Ecol Lab, PO Drawer E, Aiken, SC 29802 USA. EM collins@srel.edu NR 32 TC 15 Z9 27 U1 5 U2 21 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0960-8524 J9 BIORESOURCE TECHNOL JI Bioresour. Technol. PD MAY PY 2005 VL 96 IS 8 BP 937 EP 948 DI 10.1016/j.biortech.2004.08.005 PG 12 WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels GA 898KV UT WOS:000227076600010 PM 15627565 ER PT J AU Tcherkasskaya, O Davidson, EA Schmerr, MJ Orser, CS AF Tcherkasskaya, O Davidson, EA Schmerr, MJ Orser, CS TI Conformational biosensor for diagnosis of prion diseases SO BIOTECHNOLOGY LETTERS LA English DT Article DE biosensors; conformation; excimer; fluorescence; prion diseases ID PROTEIN; AMYLOIDOGENESIS; ANTIBODIES AB A fluorescence technology to monitor the proliferation of amyloidogenic neurological disorders is proposed. A crude brain homogenate (0.01%) from animals infected with a transmissible spongiform encephalopathy is employed as a catalytic medium initiating conformational changes in 520 nM polypeptide biosensors (Tris/trifluoroethanol 50% mixture at pH 7). The fluorescence methods utilize pyrene residues covalently attached to the peptide ends. The coil-to-beta-strand transitions in biosensor molecules cause elevation of a distinct fluorescence band of the pyrene aggregates (i.e. excimers). This approach enables the detection of infectious prion proteins at fmol, does not require antibody binding or protease treatment. Technology might be adopted for diagnosing a large variety of conformational disorders as well as for generic high-throughput screening of the amyloidogenic potential in plasma. C1 Georgetown Univ, Sch Med, Dept Biochem & Mol Biol, Washington, DC 20057 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Adlyfe, Rockville, MD 20850 USA. RP Tcherkasskaya, O (reprint author), Georgetown Univ, Sch Med, Dept Biochem & Mol Biol, 3900 Reservoir Rd, Washington, DC 20057 USA. EM ovt@georgetown.edu FU NHLBI NIH HHS [IR43 HL70399-01] NR 12 TC 7 Z9 9 U1 0 U2 6 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0141-5492 J9 BIOTECHNOL LETT JI Biotechnol. Lett. PD MAY PY 2005 VL 27 IS 9 BP 671 EP 675 DI 10.1007/s10529-005-4478-7 PG 5 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 938WH UT WOS:000230033600012 PM 15977076 ER PT J AU Walker, IS Forest, TW Wilson, DJ AF Walker, IS Forest, TW Wilson, DJ TI An attic-interior infiltration and interzone transport model of a house SO BUILDING AND ENVIRONMENT LA English DT Article DE attic; house; infiltration; ventilation; wind; buoyancy; tracer gas ID WIND AB A detailed model is developed for predicting the ventilation rates of the indoor, conditioned zone of a house and the attic zone. The complete set of algorithms is presented in a form for direct incorporation in a two zone ventilation model. One of the important predictions from this model is the leakage flow rate between the indoor and attic zones. Ventilation rates are predicted from a steady state mass flow rate balance for each zone where all individual flow rates through leakage sites are based on a power law expression for flow rate versus pressure difference. The envelope leakage includes distributed leakage associated with background leakage, localized leakage associated with vents and flues, and active fan ventilation. The predicted ventilation rates agree quite well with field measurements of ventilation rates in houses and attics with different leakage configurations, without the use of any empirically adjusted parameters or constants. (C) 2004 Elsevier Ltd. All rights reserved. C1 Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 2G8, Canada. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Forest, TW (reprint author), Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 2G8, Canada. EM tom.forest@ualberta.ca NR 22 TC 6 Z9 6 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-1323 J9 BUILD ENVIRON JI Build. Environ. PD MAY PY 2005 VL 40 IS 5 BP 701 EP 718 DI 10.1016/j.buildenv.2004.08.002 PG 18 WC Construction & Building Technology; Engineering, Environmental; Engineering, Civil SC Construction & Building Technology; Engineering GA 900YT UT WOS:000227250900010 ER PT J AU Somorjai, GA AF Somorjai, GA TI The catalytic nanodiode. Its role in catalytic reaction mechanisms in a historical perspective SO CATALYSIS LETTERS LA English DT Article DE catalytic nanodiode; electron flow in catalysis; hot electrons ID ETHYLENE HYDROGENATION; AMMONIA-SYNTHESIS; SINGLE-CRYSTAL; CO; SUPPORT AB Catalytic nanodiodes, Pt/TiO2 or Pt/GaN produce continuous flow of hot electron current during carbon monoxide oxidation for hours in the 80 - 150 degrees C temperature range at pressures of 100 Torr of O-2 and 40 Torr of CO. These observations provide proof of the Schottky diode model of oxide supported metal catalysis of many reactions that have been proposed by Schwab, Solymosi and others since the 1960s. The flow of hot electrons should influence chemistry at oxide - metal interfaces and the metal particle size dependence of catalytic activity and selectivity. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. NR 18 TC 14 Z9 14 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1011-372X J9 CATAL LETT JI Catal. Lett. PD MAY PY 2005 VL 101 IS 1-2 BP 1 EP 3 DI 10.1007/s10562-005-0112-5 PG 3 WC Chemistry, Physical SC Chemistry GA 918NQ UT WOS:000228549400001 ER PT J AU Liu, H Radisky, DC Bissell, MJ AF Liu, H Radisky, DC Bissell, MJ TI Proliferation and polarity in breast cancer - Untying the Gordian knot SO CELL CYCLE LA English DT Article DE proliferation; polarity; PI3 kinase; Akt; Rac1; tumorigenesis; 3 dimension (3D) ID GROWTH-FACTOR RECEPTOR; TUMOR PROGRESSION; EPITHELIAL-CELLS; IN-VIVO; PHOSPHATIDYLINOSITOL 3-KINASE; SIGNALING PATHWAYS; TRANSGENIC MICE; ACTIVATION; DROSOPHILA; KINASE AB Epithelial cancers are associated with genomic instability and alterations in signaling pathways that affect proliferation, apoptosis, and integrity of tissue structure. Overexpression of a number of oncogenic protein kinases has been shown to malignantly transform cells in culture and to cause tumors in vivo, but the interconnected signaling events induced by transformation still awaits detailed dissection. We propose that the network of cellular signaling pathways can be classified into functionally distinct branches, and that these pathways are rewired in transformed cells and tissues after they lose tissue-specific architecture to favor tumor expansion and invasion. Using three-dimensional (3D) culture systems, we recently demonstrated that polarity and proliferation of human mammary epithelial cancer cells were separable consequences of signaling pathways downstream of PI3 kinase. These, and results from a number of other laboratories are beginning to provide insight into how different signaling pathways may become interconnected in normal tissues to allow homeostasis, and how they are disrupted during malignant progression. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Bissell, MJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM mjbissell@lbl.gov NR 48 TC 20 Z9 21 U1 1 U2 4 PU LANDES BIOSCIENCE PI GEORGETOWN PA 810 SOUTH CHURCH STREET, GEORGETOWN, TX 78626 USA SN 1538-4101 J9 CELL CYCLE JI Cell Cycle PD MAY PY 2005 VL 4 IS 5 BP 646 EP 649 DI 10.4161/cc.4.5.1674 PG 4 WC Cell Biology SC Cell Biology GA 933UH UT WOS:000229657900004 PM 15846085 ER PT J AU Burtis, CA AF Burtis, CA TI 20 : 20 vision (the laboratory of the future) SO CLINICA CHIMICA ACTA LA English DT Meeting Abstract CT European Congress of Clinical Biochemistry and Laboratory Medicine (EUROMEDLAB 2005) CY MAY 08-12, 2005 CL Glasgow, SCOTLAND SP IFCC, FESCC C1 Oak Ridge Natl Lab, Div Hlth Sci, Oak Ridge, TN USA. EM cxb@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-8981 J9 CLIN CHIM ACTA JI Clin. Chim. Acta PD MAY PY 2005 VL 355 SU S BP S7 EP S7 PG 1 WC Medical Laboratory Technology SC Medical Laboratory Technology GA 928DD UT WOS:000229250400010 ER PT J AU Ma, J Lu, H Wang, B Roy, S Hornung, R Wissink, A Komanduri, R AF Ma, J Lu, H Wang, B Roy, S Hornung, R Wissink, A Komanduri, R TI Multiscale simulations using generalized interpolation material point (GIMP) method and SAMRAI parallel processing SO CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES LA English DT Article DE material point method (MPM); generalized interpolation material point method (GIMP); tension; nanoindentation; parallel computing; SAMRAI; multilevel refinement; contact problem ID MOLECULAR-DYNAMICS; SOLID MECHANICS; FINITE-ELEMENT; MLPG METHOD AB In the simulation of a wide range of mechanics problems including impact/contact/penetration and fracture, the material point method (MPM), Sulsky, Zhou and Shreyer (1995), demonstrated its computational capabilities. To resolve alternating stress sign and instability problems associated with conventional MPM, Bardenhagen and Kober (2004) introduced recently the generalized interpolation material point (GIMP) method and implemented for one-dimensional simulations. In this paper we have extended GIMP to 2D and applied to simulate simple tension and indentation problems. For simulations spanning multiple length scales, based on the continuum mechanics approach, we present a parallel GIMP computational method using the Structured Adaptive Mesh Refinement Application Infrastructure (SAMRAI). SAMRAI is used for multi-processor distributed memory computations, as a platform for domain decomposition, and for multi-level refinement of the computational domain. Nested computational grid levels (with successive spatial and temporal refinements) are used in GIMP simulations to improve the computational accuracy and to reduce the overall computational time. The domain of each grid level is divided into multiple rectangular patches for parallel processing. This domain decomposition embedded in SAMRAI is very flexible when applied to GIMP. As an example to validate the parallel GIMP computing scheme under SAMRAI parallel computing environment, numerical simulations with multiple length scales from nanometer to millimeter were conducted on a 2D nano indentation problem. A contact algorithm in GIMP has also been developed for the treatment of contact pair between a rigid indenter and a deformable workpiece. GIMP results are compared with finite element results on indentation for validation. A GIMP nanoindentation problem with five levels of refinement was modeled using multi-processors to demonstrate the potential capability of the parallel GIMP computation. C1 Oklahoma State Univ, Sch Mech & Aerosp Engn, Stillwater, OK 74078 USA. Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. RP Komanduri, R (reprint author), Oklahoma State Univ, Sch Mech & Aerosp Engn, Stillwater, OK 74078 USA. EM ranga@ceat.okstate.edu RI Lu, Hongbing/A-1312-2011 NR 21 TC 19 Z9 21 U1 0 U2 7 PU TECH SCIENCE PRESS PI ENCINO PA 4924 BALBOA BLVD, # 488, ENCINO, CA 91316 USA SN 1526-1492 J9 CMES-COMP MODEL ENG JI CMES-Comp. Model. Eng. Sci. PD MAY PY 2005 VL 8 IS 2 BP 135 EP 152 PG 18 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA 939ML UT WOS:000230077000004 ER PT J AU Sutherland, JC Smith, PJ Chen, JH AF Sutherland, JC Smith, PJ Chen, JH TI Quantification of differential diffusion in nonpremixed systems SO COMBUSTION THEORY AND MODELLING LA English DT Article ID EFFECTIVE BINARY DIFFUSION; MOLECULAR-DIFFUSION; JET FLAMES; FLOW; COMBUSTION; TRANSPORT; KINETICS; FUEL AB Most attempts to quantify differential diffusion (DD) are based on the difference between different definitions of the mixture fraction. This paper presents a general method for evaluating differential diffusion in premixed or nonpremixed systems based on conservation equations for the elemental mass fractions. These measures form a basis for analysing differential diffusion. Casting these in terms of a mixture fraction gives particular insight into differential diffusion for nonpremixed systems, and provides a single DD measure. Furthermore, it allows direct evaluation of the validity of the traditional assumptions involved in writing a mixture fraction transport equation. Results are presented for one dimensional opposed flow simulations of hydrogen and methane flames as well as direct numerical simulations (DNS) of CH4/H-2-air and CO/H-2-air flames. For a common definition of the mixture fraction, the DD measure can be approximated well by considering only the contribution of H-2 and CH4 in methane-air flames. Differential diffusion is largely driven by production of H-2 in the flame zone for hydrocarbon flames. Effects of strain rate and filter width on the relative importance of differential diffusion are examined. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Utah, Dept Chem Engn, Salt Lake City, UT 84112 USA. Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Sutherland, JC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jnstithe@sandia.gov OI Sutherland, James/0000-0002-2955-3472 NR 33 TC 23 Z9 23 U1 1 U2 6 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1364-7830 J9 COMBUST THEOR MODEL JI Combust. Theory Model. PD MAY PY 2005 VL 9 IS 2 BP 365 EP 383 DI 10.1080/17455030500150009 PG 19 WC Thermodynamics; Energy & Fuels; Engineering, Chemical; Mathematics, Interdisciplinary Applications SC Thermodynamics; Energy & Fuels; Engineering; Mathematics GA 962AQ UT WOS:000231703800008 ER PT J AU Dobaczewski, J Olbratowski, P AF Dobaczewski, J Olbratowski, P TI Solution of the Skyrme-Hartree-Fock-Bogolyubov equations in the Cartesian deformed harmonic-oscillator basis. (V) HFODD(v2.08k) SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE nuclear physics; Hartree-Fock; Hartree-Fock-Bogolyubov; Skyrme interaction; self-consistent mean field; nuclear many-body problem; superdeformation; quadrupole deformation; octupole deformation; pairing; nuclear radii; single-particle spectra; nuclear rotation; high-spin states; moments of inertia; level crossings; harmonic oscillator; Coulomb field; point symmetries AB We describe the new version (v2.08k) of the code HFODD which solves the nuclear Skyrme-Hartree-Fock or Skyrme-Hartree-Fock-Bogolyubov problem by using the Cartesian deformed harmonic-oscillator basis. Similarly as in the previous version (v2.08i), all symmetries can be broken, which allows for calculations with angular frequency and angular momentum tilted with respect to the mass distribution. In the new version, three minor errors have been corrected. C1 Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Univ Strasbourg 1, Inst Rech Subatom, CNRS, F-67037 Strasbourg, France. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Dobaczewski, J (reprint author), Univ Warsaw, Inst Theoret Phys, Hoza 69, PL-00681 Warsaw, Poland. EM dobaczew@mail.phy.ornl.gov NR 0 TC 29 Z9 29 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD MAY 1 PY 2005 VL 167 IS 3 BP 214 EP 216 DI 10.1016/j.cpc.2005.01.014 PG 3 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 921OV UT WOS:000228775000006 ER PT J AU Tartakovsky, DM Alexander, FJ AF Tartakovsky, DM Alexander, FJ TI Multiphysics modeling - Guest editors' introduction SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Editorial Material C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Tartakovsky, DM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM dmt@lanl.gov; fja@lanl.gov RI Tartakovsky, Daniel/E-7694-2013 NR 0 TC 3 Z9 3 U1 0 U2 3 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 2005 VL 7 IS 3 BP 14 EP 15 DI 10.1109/MCSE.2005.51 PG 2 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100004 ER PT J AU Martin, DF Colella, P Anghel, M Alexander, FJ AF Martin, DF Colella, P Anghel, M Alexander, FJ TI Adaptive mesh refinement for multiscale nonequilibrium physics SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article ID PROJECTION METHOD; EQUATIONS; GRIDS AB In this article, the authors demonstrate how to use adaptive mesh refinement (AMR) methods for the study of phase transition kinetics. In particular, they apply a block-structured AMR approach to investigate phase ordering in the time-dependent Ginzburg-Landou equations. C1 Lawrence Berkeley Natl Lab, Appl Numer Algorithms Grp, Berkeley, CA USA. Los Alamos Natl Lab, Comp & Computat Sci Div, Los Alamos, NM 87545 USA. RP Martin, DF (reprint author), Lawrence Berkeley Natl Lab, Appl Numer Algorithms Grp, Berkeley, CA USA. EM dfmartin@lbl.gov; pcolella@lbl.gov; manghel@lanl.gov; fja@lanl.gov NR 24 TC 12 Z9 12 U1 0 U2 1 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 2005 VL 7 IS 3 BP 24 EP 31 DI 10.1109/MCSE.2005.45 PG 8 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100006 ER PT J AU Alexander, FJ Tartakovsky, DM Garcia, AL AF Alexander, FJ Tartakovsky, DM Garcia, AL TI Noise in algorithm refinement methods SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article ID FLUCTUATIONS; EQUATIONS AB Hybrid or algorithm refinement (AR) schemes have focused mainly on the mean behavior of system states. However, variances in these behaviors, such as spontaneous fluctuations, are important for modeling certain phenomena. This article discusses the effects of statistical fluctuations on hybrid computational methods that combine a particle algorithm with a partial differential equation solver. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. San Jose State Univ, San Jose, CA 95192 USA. RP Alexander, FJ (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM fja@lanl.gov; dmt@lanl.gov; algarcia@algarcia.org RI Tartakovsky, Daniel/E-7694-2013 NR 10 TC 7 Z9 7 U1 0 U2 1 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 2005 VL 7 IS 3 BP 32 EP 38 DI 10.1109/MCSE.2005.56 PG 7 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100007 ER PT J AU Hyman, JM AF Hyman, JM TI Patch dynamics for multiscale problems SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article ID BIFURCATION-ANALYSIS; EXAMPLE AB The engineering analysis and microscopic simulations required for predicting materials' properties from atomistic descriptions require new approaches for predicting macroscopic properties, Patch dynamics bridges the gap between the time and space scales at which the microscopic models operate, helping predict system-level behavior. C1 Los Alamos Natl Lab, Math Anal & Modeling Grp, Los Alamos, NM 87545 USA. RP Hyman, JM (reprint author), Los Alamos Natl Lab, Math Anal & Modeling Grp, Los Alamos, NM 87545 USA. EM hyman@lanl.gov NR 13 TC 11 Z9 11 U1 0 U2 2 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 2005 VL 7 IS 3 BP 47 EP 53 DI 10.1109/MCSE.2005.57 PG 7 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100009 ER PT J AU Bailey, DH AF Bailey, DH TI High-precision floating-point arithmetic in scientific computation SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article AB IEEE 64-bit floating-point arithmetic is sufficient for most scientific applications, but a rapidly growing body of scientific computing applications requires a higher level of numeric precision. New software packages have yielded interesting scientific results that suggest numeric precision in scientific computations could be as important to program design as algorithms and data structures. C1 Lawrence Berkeley Natl Lab, Computat Res Dev, Berkeley, CA USA. RP Bailey, DH (reprint author), Lawrence Berkeley Natl Lab, Computat Res Dev, Berkeley, CA USA. EM dhbailey@llbl.gov NR 24 TC 37 Z9 46 U1 2 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 J9 COMPUT SCI ENG JI Comput. Sci. Eng. PD MAY-JUN PY 2005 VL 7 IS 3 BP 54 EP 61 DI 10.1109/MCSE.2005.52 PG 8 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100010 ER PT J AU Dubois, PF AF Dubois, PF TI Maintaining correctness in scientific programs SO COMPUTING IN SCIENCE & ENGINEERING LA English DT Article C1 Lawrence Livermore Natl Lab, Livermore, CA USA. NR 4 TC 10 Z9 10 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 2005 VL 7 IS 3 BP 80 EP 85 DI 10.1109/MCSE.2005.54 PG 6 WC Computer Science, Interdisciplinary Applications SC Computer Science GA 917RO UT WOS:000228487100015 ER PT J AU Croshaw, DA Schable, NA Peters, MB Glenn, TC AF Croshaw, DA Schable, NA Peters, MB Glenn, TC TI Isolation and characterization of microsatellite DNA loci from Ambystoma salamanders SO CONSERVATION GENETICS LA English DT Article DE Ambystoma opacum; Ambystoma talpoideum; microsatellites; PCR primers; STR ID POPULATION-STRUCTURE; ISOLATED WETLANDS; HABITAT; MARKERS; DECLINE C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ New Orleans, Dept Biol Sci, New Orleans, LA 70148 USA. Univ S Carolina, Dept Biol Sci, Columbia, SC 29208 USA. RP Croshaw, DA (reprint author), Univ Georgia, Savannah River Ecol Lab, Drawer E, Aiken, SC 29802 USA. EM croshaw@srel.edu RI Glenn, Travis/A-2390-2008 NR 22 TC 10 Z9 10 U1 1 U2 3 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 1566-0621 J9 CONSERV GENET JI Conserv. Genet. PD MAY PY 2005 VL 6 IS 3 BP 473 EP 479 DI 10.1007/s10592-005-4989-8 PG 7 WC Biodiversity Conservation; Genetics & Heredity SC Biodiversity & Conservation; Genetics & Heredity GA 947MU UT WOS:000230651100014 ER PT J AU Mehrabadi, MM Cowin, SC Massoudi, M AF Mehrabadi, MM Cowin, SC Massoudi, M TI Conservation laws and constitutive relations for density-gradient-dependent viscous fluids SO CONTINUUM MECHANICS AND THERMODYNAMICS LA English DT Article DE conservation laws; constitutive relations; density gradient; dipolar stress; interstitial working ID STRESS; THERMODYNAMICS AB Conservation laws and constitutive relations for a density-gradient-dependent viscous fluid as a multipolar continuum obeying an entropy inequality with generalized entropy flux and supply density are considered in this paper. A decomposition of the rate of work of dipolar stress, which reveals the contribution of various parts of this stress to the energy equation, is used to discuss the inconsistencies between the results obtained here and those obtained by Bluestein and Green [1] on the basis of the pioneering work of Green and Rivlin [8]. Furthermore, we discuss the connection between the model presented here and the materials of Korteweg type considered by Dunn and Serrin [6]. In particular, we relate the rate of work of dipolar stress and the interstitial working introduced by Dunn and Serrin [6]. C1 Tulane Univ, Dept Mech Engn, New Orleans, LA 70118 USA. CUNY City Coll, Sch Engn, Dept Mech Engn, New York, NY 10031 USA. CUNY, Ctr Biomed Engn, New York, NY 10031 USA. CUNY, Grad Sch, New York, NY 10031 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Mehrabadi, MM (reprint author), Tulane Univ, Dept Mech Engn, New Orleans, LA 70118 USA. EM mmm@tulane.edu NR 27 TC 9 Z9 9 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0935-1175 J9 CONTINUUM MECH THERM JI Continuum Mech. Thermodyn. PD MAY PY 2005 VL 17 IS 2 BP 183 EP 200 DI 10.1007/s00161-004-0197-x PG 18 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA 918LS UT WOS:000228543900008 ER PT J AU Graves, SW Woods, TA Kim, H Nolan, JP AF Graves, SW Woods, TA Kim, H Nolan, JP TI Direct fluorescent staining and analysis of proteins on microspheres using CBQCA SO CYTOMETRY PART A LA English DT Article DE flow cytometry; surface chemistry; protein; microsphere; 3-(4-carboxybenzoyl)quinoline-2-carboxaldehyde; calibration; mean equivalent soluble fluoresceins ID SUSPENSION ARRAY TECHNOLOGY; FLOW-CYTOMETRY; DNA FRAGMENTS; SYSTEM; ASSAY AB Background: General methods for accurate determination of microsphere surface protein loading are needed for applications from protein arrays to molecular assembly studies. Current methods include bulk absorption measurements of stained microspheres or use of known fluorescently tagged binding partners, which limit sensitivity and general applicability, respectively. Methods: Microspheres bearing covalently coupled proteins were stained with 3-(4-carboxybenzoyl)quinoline-2-carboxaldehyde (CBQCA) using different incubation times and dye concentrations to determine optimal staining conditions. The CBQCA fluorescence of microspheres (measured by flow cytometry) bearing known amounts of protein were used to generate standard curves of CBQCA fluorescence response versus the amount of microsphere surface protein. CBQCA was also used to stain noncovalent protein interactions. Results: Maximal labeling was attained within 1 h with 1 mM CBQCA. Linear fluorescence response occurred between 8 X 10(4) and 1 X 10(6) proteins/microsphere. CBQCA staining did not disturb noncovalent protein interactions. Conclusions: We have developed methods using CBQCA and flow cytometry to quickly and simply quantify the amount of protein on the surface of a microsphere. Importantly, this approach could be extended to other formats (e.g., chips). Further, because it does not disturb noncovalent protein-protein interactions, it may be possible to use this approach to detect protein interactions without the use of purified prestained probes. Published 2005 Wiley-Liss, Inc.(dagger). C1 Los Alamos Natl Lab, Natl Flow Cytometry Resource, Biosci Div, Los Alamos, NM 87545 USA. RP Graves, SW (reprint author), Los Alamos Natl Lab, Natl Flow Cytometry Resource, Biosci Div, Mail Stop M888, Los Alamos, NM 87545 USA. EM graves@lanl.gov OI Kim, Heungbok/0000-0002-4359-8423 FU NCRR NIH HHS [2P41RR001315] NR 18 TC 7 Z9 8 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1552-4922 J9 CYTOM PART A JI Cytom. Part A PD MAY PY 2005 VL 65A IS 1 BP 50 EP 58 DI 10.1002/cyto.a.20138 PG 9 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 921CA UT WOS:000228740600007 PM 15812850 ER PT J AU Shao, MH Warren, J Marinkovic, NS Faguy, PW Adzic, RR AF Shao, MH Warren, J Marinkovic, NS Faguy, PW Adzic, RR TI In situ ATR-SEIRAS study of electro oxidation of dimethyl ether on a Pt electrode in acid solutions SO ELECTROCHEMISTRY COMMUNICATIONS LA English DT Article DE dimethyl ether; electrooxidation; surface enhanced infrared absorption spectroscopy; platinum ID INFRARED-ABSORPTION SPECTROSCOPY; SINGLE-CRYSTAL ELECTRODES; FUEL-CELLS; VIBRATIONAL SPECTROSCOPY; ORGANIC-MOLECULES; LOW-TEMPERATURE; METHYL FORMATE; CARBON-DIOXIDE; METHANOL; ADSORPTION AB The electrooxidation of dimethyl ether (DME) was studied on a Pt film electrode in HClO4 solution using surface enhanced infrared absorption spectroscopy (SEIRAS) and cyclic voltammetry. (CH2OCH3)(ad) and eta(2)(O,C)-H2CO are inferred as the adsorbed intermediates resulting from the dissociative adsorption of DME in the hydrogen adsorption region. Adsorbed CO was also found, with coverages increasing rapidly upon DME adsorption, probably due to the further dissociation of (CH2OCH3)(ad) and eta(2)(O,C)- H2CO. In the main oxidation region no adsorbed species, excluding CO, were found. However, for low DME concentration (0.025 M), vibration bands associated with adsorbed CH3COO or CH3OCOO were observed between 0.3 and 0.95 V. These results lead to the conclusion that the reaction products could depend on the concentration of the fuel. Additional discussion of the reaction mechanism is also presented. (c) 2005 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. Brookhaven Natl Lab, Instrumentat Div, Upton, NY 11973 USA. Brookhaven Natl Lab, NSLS, Ctr Synchrotron Biosci, Upton, NY 11973 USA. Admamede, Rochester Hills, MI 48306 USA. RP Adzic, RR (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. EM adzic@bnl.gov RI Marinkovic, Nebojsa/A-1137-2016; OI Marinkovic, Nebojsa/0000-0003-3579-3453; Shao, Minhua/0000-0003-4496-0057 NR 42 TC 25 Z9 26 U1 1 U2 21 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1388-2481 J9 ELECTROCHEM COMMUN JI Electrochem. Commun. PD MAY PY 2005 VL 7 IS 5 BP 459 EP 465 DI 10.1016/j.elecom.2005.02.024 PG 7 WC Electrochemistry SC Electrochemistry GA 921SH UT WOS:000228784600001 ER PT J AU Johnson, CS Li, N Vaughey, JT Hackney, SA Thackeray, MM AF Johnson, CS Li, N Vaughey, JT Hackney, SA Thackeray, MM TI Lithium-manganese oxide electrodes with layered-spinel composite structures xLi(2)MnO(3)center dot(1-x)Li1+yMn2-yO4 (0 < x < 1, 0 <= y <= 0.33) for lithium batteries SO ELECTROCHEMISTRY COMMUNICATIONS LA English DT Article DE lithium batteries; composite electrode; structure; spinet; Li2MnO3 ID ELECTROCHEMICAL PROPERTIES; NEUTRON-DIFFRACTION; THERMAL-STABILITY; CATHODE MATERIALS; LOCAL-STRUCTURE; ION BATTERIES; LI2MNO3; CELLS; DIOXIDE; NMR AB Lithium-manganese oxide electrodes containing structurally integrated domains of layered and spinel phases, represented in two-component notation as xLi(2)MnO(3)(.)(1-x)Li1+yMn2-yO4 (0 < x < 1, 0 <= y <= 0.33), were synthesized and evaluated in lithium cells. During an initial charge to 5 V, lithium and/or lithia (Li2O) are extracted from the spinel and layered components at distinct voltages. When cycled between 5 and 2 V, a rechargeable capacity > 250 mAh/g can be achieved from electrodes prepared at 400 degrees C during the early cycles. The discharge profiles confirm the layered-spinel character of the composite electrodes. The Li2MnO3 Mn(IV) content in the parent structure and the degree to which lithium and lithia are extracted from the electrode during the initial charge can be used to control the average manganese oxidation state at the end of discharge and electrochemical cycling stability. (c) 2005 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Div Chem Engn, Electrochem Technol Program, Argonne, IL 60439 USA. Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA. RP Thackeray, MM (reprint author), Argonne Natl Lab, Div Chem Engn, Electrochem Technol Program, 9700 S Cass Ave, Argonne, IL 60439 USA. EM thackeray@cmt.anl.gov NR 42 TC 126 Z9 134 U1 8 U2 91 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 1388-2481 J9 ELECTROCHEM COMMUN JI Electrochem. Commun. PD MAY PY 2005 VL 7 IS 5 BP 528 EP 536 DI 10.1016/j.elecom.2005.02.027 PG 9 WC Electrochemistry SC Electrochemistry GA 921SH UT WOS:000228784600013 ER PT J AU Yang, WC Yeung, ES Schmerr, MJ AF Yang, WC Yeung, ES Schmerr, MJ TI Detection of prion protein using a capillary electrophoresis-based competitive immunoassay with laser-induced fluorescence detection and cyclodextrin-aided separation SO ELECTROPHORESIS LA English DT Article DE capillary electrophoresis; competitive immunoassay; cycloclextrins; fluorescent peptide; prion protein ID SCRAPIE; PEPTIDES; DISEASES; COATINGS; BIOLOGY; AGENT; SHEEP; ASSAY; PRP AB The development of capillary electrophoresis (CE)-based competitive immunoassay for prion protein (PrP) using carboxymethyl β-cyclodextrin (CM-β-CD) as a buffer additive is described here. The assay was based on the competitive binding of PrP and a fluorescein-labeled peptide from the prion protein with a limiting amount of specific antibody. The amount of both free and fluorescein-labeled peptide bound to antibody (immunocomplex) were determined by CE with laser-induced fluorescence detection. In the presence of PrP, the peak height ratio of the immunocomplex and the free peptide was altered compared to the control. These changes were directly proportional to the amount of PrP present. The fluorescently labeled peptide spanning amino acid positions 140-158 of the PrP and its corresponding monoclonal antibody is reported here. The reaction times of the antibody with either the peptide or the recombinant PrP was less than 1 min and is a large improvement over the 16-18 h required to achieve equilibrium for polyclonal antibodies. CM-β-CD was explored as a buffer additive to suppress analyte adsorption and enhance separation selectivity in the CE analysis. A fast (1.1 min), selective (resolution 4.7), and reproducible (relative standard deviations of migration time for free and bound fluorescein isothiocyanate (FITC)-peptide 0.56% and 0.64%, respectively) separation was obtained with 0.6% CM-β-CD in 25 mM N-tris(hydroxymethyl)methyl-3-aminopropanesulfonic acid (TAPS) at pH 8.8. The concentration detection limit of the assay for recombinant PrP was determined to be 80 ng/mL (or mass detection limit 1 pg). When blood samples from scrapie-infected sheep and from normal sheep were tested, the results of the blood assay were consistent with scrapie status of the sheep as determined postmortem by Western blot analysis. Development of this assay will lead to a potentially robust, rapid, and specific preclinical diagnosis for transmissible spongiform encephalopathies (TSEs) in animals and humans. C1 Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Schmerr, MJ (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. EM mschmerr@ameslab.gov RI Yang, Wen-chu/D-3497-2009 NR 34 TC 34 Z9 36 U1 1 U2 13 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0173-0835 J9 ELECTROPHORESIS JI Electrophoresis PD MAY PY 2005 VL 26 IS 9 BP 1751 EP 1759 DI 10.1002/elps.200410202 PG 9 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 926PO UT WOS:000229135300017 PM 15815999 ER PT J AU Mela, P van den Berg, A Fintschenko, Y Cummings, EB Simmons, BA Kirby, BJ AF Mela, P van den Berg, A Fintschenko, Y Cummings, EB Simmons, BA Kirby, BJ TI The zeta potential of cyclo-olefin polymer microchannels and its effects on insulative (electrodeless) dielectrophoresis particle trapping devices SO ELECTROPHORESIS LA English DT Article DE cyclo-olefin; dielectrophoresis; electroosmosis; microchannel; microchip; miniaturization; zeta potential ID CAPILLARY-ELECTROPHORESIS; MICROFLUIDIC DEVICES; ELECTROOSMOTIC FLOW; SEPARATION; DNA; BACTERIA; ARRAY; CHIP AB While cyclo-olefin polymer microchannels have the potential to improve both the optical detection sensitivity and the chemical resistance of polymer microanalytical systems, their surface properties are to date not thoroughly characterized. These surface properties dictate, among other things, electrokinetic effects when electric fields are present. Here, we report the measurement of the zeta potential of cyclo-olefin polymers (injection-molded and hot-embossed Zeonor(®) 1060R and 1020R) microchannels as a function of pH, counter-ion concentration, storage conditions, and chemical treatment in aqueous solutions both with and without EOF-suppressing additives. In contrast with previous reports, significant surface charge is measured, consistent with titration of charged sites with pK(a) = 4.8. Storage in air, acetonitrile, or aqueous solutions has relatively minor effects. While the source of the surface charge is unclear, chemical functionalization has shown that carboxylic acid groups are not present at the surface, consistent with the chemical structure of Zeonor(®). EOF-suppressing additives (hydroxypropylmethylcellulose) and conditioning in perchloric acid allow the surface charge to be suppressed. We demonstrate dielectrophoretic particle trapping devices in Zeonor(®) 1060R substrates that show reduced trapping voltage thresholds as compared to previous implementations in glass. C1 Univ Twente, MESS Inst Nanotechnol, BIOS, Enschede, Netherlands. Sandia Natl Labs, Dept Chem Mat, Livermore, CA 94550 USA. Sandia Natl Labs, Microfluid Dept, Livermore, CA 94550 USA. RP Kirby, BJ (reprint author), Cornell Univ, Sibley Sch Mech & Aerosp Engn, 238 Upson Hall, Ithaca, NY 14853 USA. EM bk88@cornell.edu RI van den Berg, Albert/B-4648-2013; OI van den Berg, Albert/0000-0001-9019-933X; Simmons, Blake/0000-0002-1332-1810 NR 22 TC 75 Z9 77 U1 3 U2 20 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0173-0835 J9 ELECTROPHORESIS JI Electrophoresis PD MAY PY 2005 VL 26 IS 9 BP 1792 EP 1799 DI 10.1002/elps.200410153 PG 8 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 926PO UT WOS:000229135300022 PM 15812849 ER PT J AU Fossum, JO Gudding, E Fonseca, DDM Meheust, Y DiMasi, E Gog, T Venkataraman, C AF Fossum, JO Gudding, E Fonseca, DDM Meheust, Y DiMasi, E Gog, T Venkataraman, C TI Observations of orientational ordering in aqueous suspensions of a nano-layered silicate SO ENERGY LA English DT Article; Proceedings Paper CT Conference on Transport, Dissipation and Vortices CY JUN 01-05, 2003 CL Trondheim, NORWAY ID NEMATIC-ISOTROPIC TRANSITION; THIN HARD PLATELETS; CLAY SUSPENSIONS; SMECTITE CLAYS; PHASE-DIAGRAM; DISPERSIONS; PARTICLES; SYSTEMS; GELS AB We have studied colloidal suspensions of clay particles in aqueous salt solutions. These Suspensions make excellent model systems for the study of interactions between plate-shaped particles, due to the inherent possibility of tuning their electrostatic repulsion with the concentration of the salt. Various gel and sol structures are possible, including nematic liquid crystalline order, although only qualitative identification of the latter in clay colloids has been available so far. Here, we briefly review our earlier synchrotron X-ray diffraction from gravity dispersed solutions of Na fluorohectorite, a synthetic swelling clay, over a large NaCl concentration range. Our use of liquid X-ray scattering techniques allowed us to identify regions in which particles reorient from horizontal to vertical alignments in strata coexisting at different heights within the sample. We thus identified two distinct gel regions characterized by differences in orientational anisotropy and domain size. In addition, we for the first time, present visual observations of birefringence in these systems; these new observations support the interpretation of our X-ray experiments, and thus our new results provide further evidence for nematic order. (C) 2004 Elsevier Ltd. All rights reserved. C1 Norwegian Univ Sci & Technol, NTNU, Dept Phys, N-7491 Trondheim, Norway. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Argonne Natl Lab, CMC, CAT, Argonne, IL 60439 USA. RP Fonseca, DDM (reprint author), Norwegian Univ Sci & Technol, NTNU, Dept Phys, N-7491 Trondheim, Norway. EM davi.fonseca@phys.ntnu.no RI Fossum, Jon/L-1510-2016; OI Fossum, Jon/0000-0002-8952-303X; Meheust, Yves/0000-0003-1284-3251 NR 24 TC 31 Z9 32 U1 2 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-5442 EI 1873-6785 J9 ENERGY JI Energy PD MAY PY 2005 VL 30 IS 6 BP 873 EP 883 DI 10.1016/j.energy.2004.04.008 PG 11 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA 887HF UT WOS:000226295800009 ER PT J AU White, CM Smith, DH Jones, KL Goodman, AL Jikich, SA LaCount, RB DuBose, SB Ozdemir, E Morsi, BI Schroeder, KT AF White, CM Smith, DH Jones, KL Goodman, AL Jikich, SA LaCount, RB DuBose, SB Ozdemir, E Morsi, BI Schroeder, KT TI Sequestration of carbon dioxide in coal with enhanced coalbed methane recovery - A review SO ENERGY & FUELS LA English DT Review ID ARGONNE PREMIUM COALS; TRANSMISSION ELECTRON-MICROSCOPE; BLACK-WARRIOR BASIN; HEAT-TREATED COALS; ILLINOIS NO-6 COAL; LOW-RANK COALS; PORE STRUCTURE; ADSORPTION-ISOTHERMS; SURFACE-AREA; ELEVATED-TEMPERATURE AB This article reviews the storage of captured CO2 in coal seams. Other geologic formations, such as depleted petroleum reservoirs, deep saline aquifers and others have received considerable attention as sites :for sequestering CO2. This review focuses on geologic sequestration of CO2 in unmineable coalbeds as the geologic host. Key issues for geologic sequestration include potential storage capacity, the storage integrity of the geologic host, and the chemical and physical processes initiated by the deep underground injection of CO2. The review topics include (i) the estimated CO2 storage capacity of coal, along with the estimated amount and composition of coalbed gas; (ii) an evaluation of the coal seam properties relevant to CO2 sequestration, such as density, surface area, porosity, diffusion, permeability, transport, rank, adsorption/desorption, shrinkage/swelling, and thermochemical reactions; and (iii) a treatment of how coalbed methane (CBM) recovery and CO2-enhanced coalbed methane (ECBM) recovery are performed (in addition, the use of adsorption/ desorption isotherms, injection well characterization, and gas injection are described, as well as reservoir screening criteria and field tests operating in the United States and abroad); (iv) leak detection using direct measurements, chemical tracers, and seismic monitoring; (v) economic considerations using CO2 injection, flue gas injection, and predictive tools for CO2 capture/ sequestration decisions; (vi) environmental safety and health (ES&H) aspects of CO2-enhanced coalbed methane/sequestration, hydrodynamic flow through the coal seam, accurate gas inventory, ES&H aspects of produced water and practices relative to ECBM recovery/sequestration; (vii) an initial set of working hypotheses concerning the chemical, physical, and thermodynamic events initiated when CO2 is injected into a coalbed; and (viii) a discussion of gaps in our knowledge base that will require further research and development. Further development is clearly required to improve the technology and economics while decreasing the risks and hazards of sequestration technology. These concerns include leakage to the surface, induced seismic activity, and long-term monitoring to verify the storage integrity. However, these concerns should not overshadow the major advances of an emerging greenhouse gas control technology that are reviewed in this paper. C1 Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Natl Energy Technol Lab, Morgantown, WV 26505 USA. RP White, CM (reprint author), Natl Energy Technol Lab, 626 Cochrans Mill Rd,POB 10940, Pittsburgh, PA 15236 USA. EM curt.white@netl.doe.gov RI meng, xin/G-3553-2011 NR 406 TC 347 Z9 377 U1 31 U2 284 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAY-JUN PY 2005 VL 19 IS 3 BP 659 EP 724 DI 10.1021/ef040047w PG 66 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 929CW UT WOS:000229320700001 ER PT J AU Hu, ZY Boiadjiev, V Thundat, T AF Hu, ZY Boiadjiev, V Thundat, T TI Nanocatalytic spontaneous ignition and self-supporting room-temperature combustion SO ENERGY & FUELS LA English DT Article ID NANOPARTICLES AB Stable and reproducible spontaneous self-ignition and self-supporting combustion have been achieved at room temperature by exposing nanometer-sized catalytic particles to methanol/air or ethanol/air gas mixtures. Without any external ignition, structurally supported platinum nanoparticles instantaneously react with the gas mixtures. The reaction releases heat and produces CO2 and water. Such reactions starting at ambient temperature have reached both high (> 600 degrees C) and low (a few tenths of a degree above room temperature) reaction temperatures. The reaction is controlled by varying the fuel/air mixture. Catalytic activity could be dramatically changed by reducing particle size and changing particle morphology. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Hu, ZY (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM huzn@ornl.gov RI Hu, Zhiyu/J-7742-2013 NR 8 TC 31 Z9 33 U1 2 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAY-JUN PY 2005 VL 19 IS 3 BP 855 EP 858 DI 10.1021/ef0496754 PG 4 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 929CW UT WOS:000229320700018 ER PT J AU Siriwardane, RV Shen, MS Fisher, EP AF Siriwardane, RV Shen, MS Fisher, EP TI Adsorption of CO2 on zeolites at moderate temperatures SO ENERGY & FUELS LA English DT Article ID CARBON-DIOXIDE; N-2 AB Pressure swing; adsorption (PSA) and temperature swing adsorption (TSA) are potential techniques for removing carbon dioxide (CO2) from high-pressure fuel gas streams. Zeolites are suitable candidate sorbents for use in these processes; however, the systems would be even more energy efficient if the sorbents were operational at moderate or high temperatures, especially for the removal of CO2 from high-pressure gas streams, such as those from integrated gasification combined-cycle (IGCC) systems. Competitive gas adsorption tests with gas mixtures representing both coal combustion and coal gasification gas streams were conducted in an atmospheric flow reactor with five zeolites at 120 degrees C. Promising results of preferential adsorption of CO2 were observed with two of these zeolites. However, the CO2 adsorption capacity was significantly lower at 120 degrees C than at; ambient temperature. Volumetric gas adsorption tests of CO2 and nitrogen (N-2) on these two zeolites were conducted at 120 degrees C, up to a pressure of 300 psi (2 x 10(6) Pa). Both showed high CO2 adsorption capacity at high pressure. High-pressure flow reactor studies also indicated the preferential adsorption of CO2 from gas mixtures at 120 degrees C. CO2 adsorption rates were measured utilizing thermogravimetric analysis, and the rates were similar for the two zeolites. C1 US DOE, Natl Energy Technol Lab, Morgantown, WV 26507 USA. Parsons Infrastruct & Technol Grp Inc, Morgantown, WV 26507 USA. RP Siriwardane, RV (reprint author), US DOE, Natl Energy Technol Lab, 3610 Collins Ferry Rd,POB 880, Morgantown, WV 26507 USA. EM ranjani.siriwardane@netl.doe.gov NR 18 TC 185 Z9 189 U1 9 U2 63 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD MAY-JUN PY 2005 VL 19 IS 3 BP 1153 EP 1159 DI 10.1021/ef040059h PG 7 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA 929CW UT WOS:000229320700059 ER PT J AU Worrell, E Biermans, G AF Worrell, E Biermans, G TI Move over! Stock turnover, retrofit and industrial energy efficiency SO ENERGY POLICY LA English DT Article DE energy modeling; implementation; energy-efficient technology ID US IRON; STEEL AB We demonstrate the importance of stock turnover on industrial energy efficiency through a literature review and a case study of energy-intensive equipment. i.e. the electric arc furnace in the US steel industry. We describe the common methods for assessing stock turnover. We have found that both stock turnover and retrofit are important elements to explain the energy efficiency improvement rates. We investigated the development of electricity use in electric arc furnaces in the United States by tracking the development of individual furnaces over the period 1990-2002. This provides a detailed picture of changes in the stock or fleet of furnaces through turnover and/or retrofit. Our results confirm the results of other empirical studies that there is no clear lifetime of equipment. However, retired furnaces are distinctly less efficient than furnaces remaining in the stock while new furnaces are distinctly more efficient than the average stock. We found an annual average improvement in specific electricity consumption of 1.3%/year over the studied period, of which 0.7%/year was due to stock turnover and 0.5%/year due to retrofit of stock in service throughout the period. Published by Elsevier Ltd. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Tech Div, Berkeley, CA 94720 USA. Ecofys, NL-3503 RK Utrecht, Netherlands. RP Worrell, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Tech Div, MS 90R4000,1 Cycotron Rd, Berkeley, CA 94720 USA. EM eworrell@lbl.gov RI Worrell, Ernst/L-5455-2013 OI Worrell, Ernst/0000-0002-0199-9755 NR 22 TC 27 Z9 27 U1 1 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD MAY PY 2005 VL 33 IS 7 BP 949 EP 962 DI 10.1016/j.enpol.2003.10.017 PG 14 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA 891QV UT WOS:000226596500011 ER PT J AU Blumstein, C Goldman, C Barbose, G AF Blumstein, C Goldman, C Barbose, G TI Who should administer energy-efficiency programs? SO ENERGY POLICY LA English DT Article DE energy-efficiency; restructuring; administration ID CONSERVATION; MANAGEMENT; MARKET AB The restructuring of the US electricity industry created a crisis for utility operated energy-efficiency programs. This paper briefly describes the reasons for the crisis and some of its consequences. Then the paper focuses on issues related to program administration and discusses the relative merits of entities-utilities, state agencies, and non-profit corporations-that might be administrators. Four criteria are developed for choosing among program administration options: compatibility with public policy goals, effectiveness of the incentive structure, ability to realize economies of scale and scope, and contribution to the development of an energy-efficiency infrastructure. We examine one region, the Pacific Northwest, and three states, New York, Vermont, and Connecticut, which have made successful transitions to new governance and/or administration structures. Attention is also given to California where large-scale energy-efficiency programs have continued to operate, despite the fact that many of the key governance/ administration issues remain unresolved. We observe that no single administrative structure for energy-efficiency programs has yet emerged in the US that is clearly superior to all of the other alternatives. We conclude that this is not likely to happen soon for three reasons. First, policy environments differ significantly among the states. Second, the structure and regulation of the electric utility industry differs among the regions of the US. Third, market transformation and resource acquisition, two program strategies that were once seen as alternatives, are increasingly coming to be seen as complements. Energy-efficiency programs going forward are likely to include elements of both strategies. But, the administrative arrangements that are best suited to support market transformation may be different from the arrangements that are best for resource acquisition. (C) 2003 Elsevier Ltd. All rights reserved. C1 Univ Calif Berkeley, Energy Inst, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Blumstein, C (reprint author), Univ Calif Berkeley, Energy Inst, 2539 Channing Way, Berkeley, CA 94720 USA. EM blumstei@socrates.berkeley.edu NR 32 TC 7 Z9 7 U1 3 U2 10 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD MAY PY 2005 VL 33 IS 8 BP 1053 EP 1067 DI 10.1016/j.enpol.2003.11.006 PG 15 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA 899GF UT WOS:000227132200009 ER PT J AU Southworth, F Vogt, DP Curlee, TR AF Southworth, F Vogt, DP Curlee, TR TI Rural transit systems benefits in Tennessee: methodology and an empirical study SO ENVIRONMENT AND PLANNING A LA English DT Article AB This paper describes the application of a detailed benefits assessment framework and sensitivity analysis of the operation of rural public transit services in the state of Tennessee. The paper describes the major components of this benefits framework and its application to the demand-responsive services operated within the state during the 1998/99 fiscal year. An empirical analysis yields a benefit/cost ratio greater than 1.0, with benefits dominated by accessibility gains to current transit patrons through the provision of mobility-enhancing vanpool services. Without these services, the costs of providing an equivalent level of access to health care, job training, and other important household activities would be much higher. Improved and expanded transit rider-based data collection efforts are recommended. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Southworth, F (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM sou@ornl.gov; vogtdp@ornl.gov; curleetr@ornl.gov NR 32 TC 2 Z9 2 U1 0 U2 1 PU PION LTD PI LONDON PA 207 BRONDESBURY PARK, LONDON NW2 5JN, ENGLAND SN 0308-518X J9 ENVIRON PLANN A JI Environ. Plan. A PD MAY PY 2005 VL 37 IS 5 BP 861 EP 875 DI 10.1068/a37120 PG 15 WC Environmental Studies; Geography SC Environmental Sciences & Ecology; Geography GA 935HN UT WOS:000229771100008 ER PT J AU Ryti, RT Reneau, SL Katzman, D AF Ryti, RT Reneau, SL Katzman, D TI Investigations of contaminated fluvial sediment deposits: Merging of statistical and geomorphic approaches SO ENVIRONMENTAL MANAGEMENT LA English DT Article ID STREAM; TRANSPORT; SYSTEMS; IMPACTS; FATE AB Concentrations of contaminants in sediment deposits can have large spatial variability resulting from geomorphic processes acting over long time periods. Thus, systematic (e.g., regularly spaced sample locations) or random sampling approaches might be inefficient and/or lead to highly biased results. We demonstrate the bias associated with systematic sampling and compare these results to those achieved by methods that merge a geomorphic approach to evaluating the physical system and stratified random sampling concepts. By combining these approaches, we achieve a more efficient and less biased characterization of sediment contamination in fluvial systems. These methods are applied using a phased sampling approach to characterize radiological contamination in sediment deposits in two semiarid canyons that have received historical releases from the Los Alamos National Laboratory. Uncertainty in contaminant inventory was used as a metric to evaluate the adequacy of sampling during these phased investigations. Simple, one-dimensional Monte Carlo simulations were used to estimate uncertainty in contaminant inventory. We also show how one can use stratified random sampling theory to help estimate uncertainty in mean contaminant concentrations. C1 Neptune & Co Inc, Los Alamos, NM 87544 USA. Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. RP Ryti, RT (reprint author), Neptune & Co Inc, 1505 15th St,Suite B, Los Alamos, NM 87544 USA. EM rryti@neptuneinc.org NR 24 TC 2 Z9 2 U1 0 U2 4 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0364-152X J9 ENVIRON MANAGE JI Environ. Manage. PD MAY PY 2005 VL 35 IS 5 BP 632 EP 648 DI 10.1007/s00267-004-0098-6 PG 17 WC Environmental Sciences SC Environmental Sciences & Ecology GA 937ZY UT WOS:000229970900009 PM 15924205 ER PT J AU Maloney, KO Mulholland, PJ Feminella, JW AF Maloney, KO Mulholland, PJ Feminella, JW TI Influence of catchment-scale military land use on stream physical and organic matter variables in small southeastern plains catchments (USA) SO ENVIRONMENTAL MANAGEMENT LA English DT Article DE land use; military training; landscape; stream; streambed instability; BPOM; coarse woody debris; streambed particle size ID NEW-JERSEY PINELANDS; COON CREEK BASIN; WATERSHED DISTURBANCE; WOODY DEBRIS; MACROINVERTEBRATE ASSEMBLAGES; APPALACHIAN STREAMS; COMMUNITY STRUCTURE; HEADWATER STREAMS; SEDIMENT STORAGE; FINE SEDIMENT AB We conducted a 3-year study designed to examine the relationship between disturbance from military land use and stream physical and organic matter variables within 12 small (< 5.5 km(2)) Southeastern Plains catchments at the Fort Benning Military Installation, Georgia, USA. Primary land-use categories were based on percentages of bare ground and road cover and nonforested land (grasslands, sparse vegetation, shrublands, fields) in catchments and natural catchments features, including soils (% sandy soils) and catchment size (area). We quantified stream flashiness (determined by slope of recession limbs of storm hydrographs), streambed instability (measured by relative changes in bed height over time), organic matter storage [coarse wood debris (CWD) relative abundance, benthic particulate organic matter (BPOM)] and stream-water dissolved organic carbon concentration (DOC). Stream flashiness was positively correlated with average storm magnitude and percent of the catchment with sandy soil, whereas streambed instability was related to percent of the catchment containing nonforested (disturbed) land. The proportions of in-stream CWD and sediment BPOM, and stream-water DOC were negatively related to the percent of bare ground and road cover in catchments. Collectively, our results suggest that the amount of catchment disturbance causing denuded vegetation and exposed, mobile soil is (1) a key terrestrial influence on stream geomorphology and hydrology and (2) a greater determinant of in-stream organic matter conditions than is natural geomorphic or topographic variation (catchment size, soil type) in these systems. C1 Auburn Univ, Dept Biol Sci, Auburn, AL 36849 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Maloney, KO (reprint author), Auburn Univ, Dept Biol Sci, 331 Funchess Hall, Auburn, AL 36849 USA. EM malonko@auburn.edu RI Mulholland, Patrick/C-3142-2012 NR 76 TC 24 Z9 27 U1 0 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0364-152X J9 ENVIRON MANAGE JI Environ. Manage. PD MAY PY 2005 VL 35 IS 5 BP 677 EP 691 DI 10.1007/s00267-004-4212-6 PG 15 WC Environmental Sciences SC Environmental Sciences & Ecology GA 937ZY UT WOS:000229970900012 PM 15902443 ER PT J AU Tiller, BL Marco, JD Rickard, WH AF Tiller, BL Marco, JD Rickard, WH TI Metal concentrations, foraging distances, and fledging success of great blue herons nesting along the Hanford Reach of the Columbia River SO ENVIRONMENTAL MONITORING AND ASSESSMENT LA English DT Article DE Ardea herodias; blue heron; foraging distances; metal concentrations; Hanford Reach ID ECOLOGICAL RISK-ASSESSMENT; REPRODUCTIVE SUCCESS; MERCURY; EGRETS AB An ecological risk assessment of the spatial distribution of metal concentrations along the Hanford Reach of the free-flowing Columbia River in southcentral Washington, identified great blue herons, Ardea herodias, at potential risk through the ingestion of contaminated riverine biota, especially fish. We measured metal concentrations in livers of pre-flight herons from the Hanford Reach and excrement samples taken from the same nests. Nests were distributed among three colonies situated upstream and downstream from nine retired plutonium production reactors along the river where metals in reactor coolant waters had been released directly into the river or disposed to shoreline retention basins and ditches. Distances traveled by parent herons to foraging areas along the river shore were determined by visually tracking parent birds as they flew from nests to upriver and downriver foraging sites. Foraging flight distances varied between colonies with mean distances ranging between 0.7 and 3.1 km. Cadmium, Cr, and Ph concentrations were higher in excrement than in the livers of pre-flight herons but the opposite was noted for Cu, Hg, and Zn. Highest metal concentrations of Cr, Cu, Zn, Cd, and Pb, were measured in excrement taken from heron nests at the colony located upstream from all reactors. These results were consistent with metal concentrations reported in river sediment from the same regions, indicating excrement from the heron nests may be a useful indicator of dietary uptake of metals by herons. Fledging success and eggshell thickness measurements were used as an index of health of the local heron population. The results indicate that the reproductive health of great blue herons nesting along the Hanford Reach is among the highest reported in the continental United States. C1 Pacific NW Natl Lab, Richland, WA USA. Battelle Mem Inst, Columbus, OH 43201 USA. Washington State Univ, Richland, WA USA. RP Tiller, BL (reprint author), Pacific NW Natl Lab, Richland, WA USA. EM brett.tiller@pnl.gov NR 27 TC 7 Z9 7 U1 1 U2 18 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-6369 J9 ENVIRON MONIT ASSESS JI Environ. Monit. Assess. PD MAY PY 2005 VL 104 IS 1-3 BP 71 EP 79 DI 10.1007/s10661-005-1603-y PG 9 WC Environmental Sciences SC Environmental Sciences & Ecology GA 924LE UT WOS:000228979500006 PM 15931979 ER PT J AU Unrine, JM Jagoe, CH Brinton, AC Brant, HA Garvin, NT AF Unrine, JM Jagoe, CH Brinton, AC Brant, HA Garvin, NT TI Dietary mercury exposure and bioaccumulation in amphibian larvae inhabiting Carolina bay wetlands SO ENVIRONMENTAL POLLUTION LA English DT Article DE amphibian; mercury; speciation; trophic transfer; wetland ID SOUTHERN LEOPARD FROG; RANA-SPHENOCEPHALA LARVAE; STORKS MYCTERIA-AMERICANA; TADPOLES; METALS; FISH AB Inorganic mercury and methylmercury concentrations were measured both in guts and remaining carcasses of southern leopard frog (Rana sphenocephala) larvae from 10 Carolina bay wetlands in South Carolina, USA. Significant variation among bays in methylmercury and inorganic mercury concentrations existed both in guts and carcasses. There was a moderate negative correlation between dissolved organic carbon concentration in bays and mean inorganic mercury concentrations in guts. There was also a weak positive correlation between pH in bays and mean methylmercury concentrations in carcasses. The ratio of methylmercury to inorganic mercury decreased with increasing total mercury concentration in guts and in larvae, but the rate of decrease was highly variable among bays. Ratios of concentrations in carcasses to concentrations in guts were inversely related to gut concentration. Mercury concentrations in carcasses in some bays were within the range of concentrations at which adverse effects have been observed in laboratory studies of R. sphenocephala. (c) 2004 Elsevier Ltd. All rights reserved. C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29803 USA. RP Unrine, JM (reprint author), Univ Georgia, Savannah River Ecol Lab, PO Drawer E, Aiken, SC 29803 USA. EM unrine@srel.edu OI Unrine, Jason/0000-0003-3012-5261 NR 18 TC 17 Z9 18 U1 1 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0269-7491 EI 1873-6424 J9 ENVIRON POLLUT JI Environ. Pollut. PD MAY PY 2005 VL 135 IS 2 BP 245 EP 253 DI 10.1016/j.envpol.2004.11.003 PG 9 WC Environmental Sciences SC Environmental Sciences & Ecology GA 907DN UT WOS:000227695600006 PM 15734584 ER PT J AU Qafoku, NP Zachara, JM Liu, CX Gassman, PL Qafoku, OS Smith, SC AF Qafoku, NP Zachara, JM Liu, CX Gassman, PL Qafoku, OS Smith, SC TI Kinetic desorption and sorption of U(VI) during reactive transport in a contaminated Hanford sediment SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID SUBSURFACE SYSTEMS; COMPLEX-FORMATION; 2-REGION FLOW; ADSORPTION; URANIUM(VI); SOIL; CARBONATE; URANYL; MODEL; GOETHITE AB Column experiments were conducted to investigate U(VI) desorption and sorption kinetics in a sand-textured, U(VI)contaminated (22.7 mu mol kg(-1)) capillary fringe sediment from the U.S. Department of Energy (DOE) Hanford site. Saturated column experiments were performed under mildly alkaline conditions representative of the Hanford site where uranyl-carbonate and calcium-uranyl-carbonate complexes dominate aqueous speciation. A U(VI)-free solution was used to study contaminant U(VI) desorption in columns where different flow rates were applied. Sorbed, contaminant U(VI) was partially labile (11.8%), and extended leaching times and water volumes were required for complete desorption of the labile fraction. Uranium(VI) sorption was studied after the desorption of labile, contaminant U(VI) using different U(VI) concentrations in the leaching solution. Strong kinetic effects were observed for both U(VI) sorption and desorption, with half-life ranging from 8.5 to 48.5 h for sorption and from 39.3 to 150 h for desorption. Although U(VI) is semi-mobile in mildly alkaline, subsurface environments, we observed substantial U(VI) adsorption, significant retardation during transport, and atypical breakthrough curves with extended tailing. A distributed rate model was applied to describe the effluent data and to allow comparisons between the desorption rate of contaminant U(VI) with the rate of short-term U(VI) sorption. Desorption was the slower process. We speculate that the kinetic behavior results from transport or chemical phenomena within the phyllosilicate-dominated fine fraction present in the sediment. Our results suggest that U(VI) release and transport in the vadose zone and aquifer system from which the sediment was obtained are kinetically controlled. C1 MSIN, Pacific NW Natl Lab, Richland, WA 99301 USA. RP Qafoku, NP (reprint author), MSIN, Pacific NW Natl Lab, POB 999, Richland, WA 99301 USA. EM nik.qafoku@pnl.gov RI Liu, Chongxuan/C-5580-2009; OI Qafoku, Nikolla P./0000-0002-3258-5379 NR 59 TC 83 Z9 86 U1 5 U2 51 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 1 PY 2005 VL 39 IS 9 BP 3157 EP 3165 DI 10.1021/es048462q PG 9 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 921RG UT WOS:000228781700048 PM 15926566 ER PT J AU Singer, BC Hodgson, AT Destaillats, H Hotchi, T Revzan, KL Sextro, RG AF Singer, BC Hodgson, AT Destaillats, H Hotchi, T Revzan, KL Sextro, RG TI Indoor sorption of surrogates for sarin and related nerve agents SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID VOLATILE ORGANIC-COMPOUNDS; CHEMICAL WARFARE AGENTS; ENVIRONMENTAL TOBACCO-SMOKE; GAS-PHASE ORGANICS; MATERIAL-SURFACES; BUILDING-MATERIALS; DYNAMIC-BEHAVIOR; EMISSION FACTORS; COMPOUNDS VOCS; TOKYO SUBWAY AB Sorption rate parameters were determined for three organophosphorus (OP) compounds [dimethyl methylphosphonate (DMMP), diethyl ethyl phosphonate (DEEP), and triethyl phosphate (TEP)] as surrogates for the G-type nerve agents sarin (GB), soman (GD), and tabun (GA). OP surrogates were injected and vaporized with additional volatile organic compounds into a 50 m(3) chamber finished with painted wallboard. Experiments were conducted at two furnishing levels: (i) chamber containing only hard surfaces including a desk, a bookcase, tables, and chairs and (ii) with the addition of plush materials including carpet with cushion, draperies, and upholstered furniture. Each furnishing level was studied with aged and new painted wallboard. Gas-phase concentrations were measured during sealed chamber adsorb and desorb phases and then fit to three mathematical variations of a previously proposed sorption model having a surface sink and allowing for an embedded sink, A four-parameter model allowing unequal transport rates between surface and embedded sinks provided excellent fits for all conditions. To evaluate the potential effect of sorption,this model was incorporated into an indoor air quality simulation model to predict indoor concentrations of a G-type agent and a nonsorbing agent for hypothetical outdoor releases with shelter-in-place (SIP) response. Sorption was simulated using a range of parameters obtained experimentally. Simulations considered outdoor Gaussian plumes of 1- and 5-h duration and infiltration rates of 0.1, 0.3, and 0.9 h(-1). Indoor toxic loads (TL) for a 10-h SIP were calculated as integral C-2 dt for a G-type agent. For the 5-h plume, sheltering reduced TLs for the nonsorbing agent to similar to 10-65% of outdoor levels. Analogous TLs for a G-type agent were 2-31% or 0.3-12% of outdoor levels assuming slow or moderate sorption. The relative effect of sorption was more pronounced for the longer plume and higher infiltration rates. C1 Lawrence Berkeley Lab, Environm Energy Technol Div, Atmospher Sci Dept, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Environm Energy Technol Div, Indoor Environm Dept, Berkeley, CA 94720 USA. RP Singer, BC (reprint author), Lawrence Berkeley Lab, Environm Energy Technol Div, Atmospher Sci Dept, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM BCSinger@lbl.gov RI Destaillats, Hugo/B-7936-2013 NR 46 TC 37 Z9 37 U1 2 U2 21 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 1 PY 2005 VL 39 IS 9 BP 3203 EP 3214 DI 10.1021/es049144u PG 12 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 921RG UT WOS:000228781700053 PM 15926571 ER PT J AU Urban, W Rzaca-Urban, T Durell, JL Smith, AG Ahmad, I AF Urban, W Rzaca-Urban, T Durell, JL Smith, AG Ahmad, I TI First observation of excited states in the Tc-111 nucleus - A new region of deformation at 40 <= Z <= 46, N <= 68? SO EUROPEAN PHYSICAL JOURNAL A LA English DT Letter ID PRODUCT GAMMA-RAY; ROTATIONAL BANDS; FISSION; ISOTOPES; IDENTIFICATION; SN-132 AB The Tc-III nucleus, populated in the spontaneous fission of Cm-248, was studied by means of prompt gamma-ray spectroscopy using the EUROGAM2 array. Excited states in Tc-111 were observed for the first. time. Systematics of energy levels in odd-A Tc isotopes, obtained in our study of Tc-107 and Tc-109 provide a reliable spin and parity assignment I = 5/2(+) to the head of the new band in Tc-111, interpreted as the pi 5/2(+)[422] or bital originating from the proton g(9/2) shell. This level is most likely the ground state. Therefore, the (9/2(+), 7/2(+)) spin-parity assignment to the ground state of Tc-111, reported previously, is unlikely. Properties of the yrast band in Tc-111 suggest prolate deformation of this band. There are hints that the deformation of Tc-111 is larger than that of Tc-109, possibly due to admixtures of oblate-deformed configurations, which lower their excitation energy with increasing neutron number. C1 Warsaw Univ, Fac Phys, PL-00681 Warsaw, Poland. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. Argonne Natl Lab, Argonne, IL 60439 USA. RP Urban, W (reprint author), Warsaw Univ, Fac Phys, Ul Hoza 69, PL-00681 Warsaw, Poland. EM urban@fuw.edu.pl NR 20 TC 16 Z9 16 U1 1 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAY PY 2005 VL 24 IS 2 BP 161 EP 165 DI 10.1140/epja/i2004-10140-7 PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934GG UT WOS:000229694300002 ER PT J AU Wilson, AN Dracoulis, GD Byrne, AP Davidson, PM Lane, GJ Clark, RM Fallon, P Gorgen, A Macchiavelli, AO Ward, D AF Wilson, AN Dracoulis, GD Byrne, AP Davidson, PM Lane, GJ Clark, RM Fallon, P Gorgen, A Macchiavelli, AO Ward, D TI Observation of a superdeformed band in Pb-190 SO EUROPEAN PHYSICAL JOURNAL A LA English DT Article ID EXCITATION-ENERGY; STATES; DEFORMATION; PARITY AB A superdeformed band has been observed in the N = 108 isotope Pb-190. This is the most neutron-deficient Pb isotope in which superdeformed states have been observed. Several theoretical approaches have predicted that N = 108 will mark the limit of observable superdeformation in the Pb isotopes. The band, which consists of five (possibly six) transitions, is observed to feed at least one isomeric level in its decay to the ground state. This decay pattern supports a spin assignment of 10 h for the lowest observed level. C1 Australian Natl Univ, Dept Nucl Phys, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia. Australian Natl Univ, The Faculties, Dept Phys, Canberra, ACT 0200, Australia. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Wilson, AN (reprint author), Australian Natl Univ, Dept Nucl Phys, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia. EM Anna.Wilson@anu.edu.au RI Dracoulis, George/A-8123-2008; Lane, Gregory/A-7570-2011; OI Lane, Gregory/0000-0003-2244-182X; Byrne, Aidan/0000-0002-7096-6455; Gorgen, Andreas/0000-0003-1916-9941; Wilson, Anna/0000-0001-6928-1689 NR 20 TC 3 Z9 3 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 1434-6001 J9 EUR PHYS J A JI Eur. Phys. J. A PD MAY PY 2005 VL 24 IS 2 BP 179 EP 183 DI 10.1140/epja/i2005-10001-y PG 5 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 934GG UT WOS:000229694300005 ER PT J AU Ovchinnikov, YN Kresin, VZ AF Ovchinnikov, YN Kresin, VZ TI Giant strengthening of superconducting pairing in metallic nanoclusters SO EUROPEAN PHYSICAL JOURNAL B LA English DT Article ID CLUSTERS; TEMPERATURE; GRAINS; STATE; PARTICLES AB The presence of shell structure and the accompanying high level degeneracy leads to a strengthening of the pairing interaction in some metallic nanoclusters. It is predicted that for specific systems one can expect a large increase in the values of the critical temperature and other parameters. C1 Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany. Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117334, Russia. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Ovchinnikov, YN (reprint author), Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany. EM vzkresin@lbl.gov NR 31 TC 32 Z9 33 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1434-6028 EI 1434-6036 J9 EUR PHYS J B JI Eur. Phys. J. B PD MAY PY 2005 VL 45 IS 1 BP 5 EP 7 DI 10.1140/epjb/e2005-00158-7 PG 3 WC Physics, Condensed Matter SC Physics GA 966RJ UT WOS:000232038400002 ER PT J AU Celani, A Puliafito, A Turitsyn, K AF Celani, A Puliafito, A Turitsyn, K TI Polymers in linear shear flow: A numerical study SO EUROPHYSICS LETTERS LA English DT Article ID BROWNIAN DYNAMICS SIMULATIONS; RHEOLOGICAL PROPERTIES; FLEXIBLE POLYMERS; ELONGATIONAL FLOW; SINGLE-MOLECULE; GRADIENT PLANE; DNA; DILUTE AB We study the dynamics of a single polymer subject to thermal fluctuations in a linear shear flow. The polymer is modeled as a finitely extendable nonlinear elastic (FENE) dumbbell. Both orientation and elongation dynamics are investigated numerically as a function of the shear strength, by means of a new efficient integration algorithm. The results are in agreement with recent experiments. C1 CNRS, UMR 6618, Inst Non Lineair Nice, F-06560 Valbonne, France. LD Landau Theoret Phys Inst, Moscow 119334, Russia. Los Alamos Natl Lab, Div Theoret, CNLS, Los Alamos, NM 87545 USA. RP Celani, A (reprint author), CNRS, UMR 6618, Inst Non Lineair Nice, 1361 Route Lucioles, F-06560 Valbonne, France. RI Turitsyn, Konstantin/K-5978-2012 OI Turitsyn, Konstantin/0000-0002-7997-8962 NR 27 TC 42 Z9 42 U1 0 U2 10 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD MAY PY 2005 VL 70 IS 4 BP 464 EP 470 DI 10.1209/epl/i2005-10015-5 PG 7 WC Physics, Multidisciplinary SC Physics GA 931OL UT WOS:000229494500007 ER PT J AU Wei, T Schmidt, R McMurtry, P AF Wei, T Schmidt, R McMurtry, P TI Comment on the Clauser chart method for determining the friction velocity SO EXPERIMENTS IN FLUIDS LA English DT Article ID TURBULENT BOUNDARY-LAYER; CHANNEL FLOWS; WALL; LAW; REGION AB A known difficulty with using the Clauser chart method to determine the friction velocity in wall bounded flows is that it assumes, a priori, a logarithmic law for the mean velocity profile. Using both experimental and DNS data in the literature, this note explicitly shows how friction velocities obtained using the Clauser chart method can potentially mask subtle Reynolds-number-dependent behavior. C1 Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA. Sandia Natl Labs, Computat Sci Dept 9233, Albuquerque, NM 87185 USA. RP Wei, T (reprint author), Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA. EM wei@eng.utah.edu NR 10 TC 16 Z9 18 U1 2 U2 11 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0723-4864 J9 EXP FLUIDS JI Exp. Fluids PD MAY PY 2005 VL 38 IS 5 BP 695 EP 699 DI 10.1007/s00348-005-0934-3 PG 5 WC Engineering, Mechanical; Mechanics SC Engineering; Mechanics GA 926AA UT WOS:000229093800013 ER PT J AU Han, Q Gao, YG Robinson, H Ding, HZ Wilson, S Li, JY AF Han, Q Gao, YG Robinson, H Ding, HZ Wilson, S Li, JY TI Crystal structures of Aedes aegypti kynurenine aminotransferase SO FEBS JOURNAL LA English DT Article DE aminotransferase; crystal structure; kynurenic acid; kynurenine aminotransferase; mosquito ID GLUTAMINE TRANSAMINASE-K; THERMUS-THERMOPHILUS HB8; SPONTANEOUSLY HYPERTENSIVE-RATS; BRANCHED-CHAIN AMINOTRANSFERASE; CONJUGATE BETA-LYASE; REDOX SWITCH; PHENYLPYRUVATE AMINOTRANSFERASE; SUBSTRATE RECOGNITION; NICOTINIC RECEPTORS; BLOOD-PRESSURE AB Aedes aegypti kynurenine aminotransferase (AeKAT) catalyzes the irreversible transamination of kynurenine to kynurenic acid, the natural antagonist of NMDA and 7-nicotinic acetycholine receptors. Here, we report the crystal structure of AeKAT in its PMP and PLP forms at 1.90 and 1.55 angstrom, respectively. The structure was solved by a combination of single-wavelength anomalous dispersion and molecular replacement approaches. The initial search model in the molecular replacement method was built with the result of single-wavelength anomalous dispersion data from the Br-AeKAT crystal in combination with homology modeling. The solved structure shows that the enzyme is a homodimer, and that the two subunits are stabilized by a number of hydrogen bonds, salts bridges, and hydrophobic interactions. Each subunit is divided into an N-terminal arm and small and large domains. Based on its folding, the enzyme belongs to the prototypical fold type, aminotransferase subgroup I. The three-dimensional structure shows a strictly conserved 'PLP-phosphate binding cup' featuring PLP-dependent enzymes. The interaction between Cys284 (A) and Cys284 (B) is unique in AeKAT, which might explain the cysteine effect of AeKAT activity. Further mutation experiments of this residue are needed to eventually understand the mechanism of the enzyme modulation by cysteine. C1 Univ Illinois, Coll Vet Med, Dept Pathobiol, Urbana, IL 61802 USA. Univ Illinois, Sch Chem Sci, Urbana, IL 61801 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Li, JY (reprint author), Univ Illinois, Coll Vet Med, Dept Pathobiol, 2001 S Lincoln Ave, Urbana, IL 61802 USA. EM jli2@uiuc.edu RI Han, Qian/J-8696-2014 OI Han, Qian/0000-0001-6245-5252 FU NIAID NIH HHS [AI 44399] NR 62 TC 15 Z9 15 U1 2 U2 4 PU BLACKWELL PUBLISHING LTD PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DG, OXON, ENGLAND SN 1742-464X J9 FEBS J JI FEBS J. PD MAY PY 2005 VL 272 IS 9 BP 2198 EP 2206 DI 10.1111/j.1742-4658.2005.04643.x PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 919TN UT WOS:000228640600012 PM 15853804 ER PT J AU Genbacev, O Krtolica, A Zdravkovic, PDUT Zdravkovic, T Brunette, E Powell, S Nath, A Caceres, E McMaster, M McDonagh, S Li, Y Mandalam, R Lebkowski, J Fisher, SL AF Genbacev, O Krtolica, A Zdravkovic, PDUT Zdravkovic, T Brunette, E Powell, S Nath, A Caceres, E McMaster, M McDonagh, S Li, Y Mandalam, R Lebkowski, J Fisher, SL TI Serum-free derivation of human embryonic stem cell lines on human placental fibroblast feeders SO FERTILITY AND STERILITY LA English DT Article DE human embryonic stem cells; human placental fibroblasts; laminin; nonxenogeneic culture; serum-free medium ID PROLONGED UNDIFFERENTIATED GROWTH; HUMAN BLASTOCYSTS; CYTOTROPHOBLAST DIFFERENTIATION; PROGENITOR CELLS; HUMAN TELOMERASE; CULTURE-SYSTEM; IN-VITRO; LAYERS; RECEPTORS; EXPANSION AB Objective: To derive new human embryonic stem cell (hESC) lines on pathogen-free human placental fibroblast feeders under serum-free conditions. Because the embryo develops in close contact with extraembryonic membranes, we hypothesized that placental mesenchyme might replicate the stern cell niche in situ. Design: We isolated and characterized human placental fibroblast lines from individual donors and tested their ability to support growth of federally registered hESC lines. Moreover, we performed extensive pathogen testing to ensure their suitability as feeders for the derivation of therapy-grade hESCs. Result(s): Human placental fibroblasts were comparable or superior to mouse embryo fibroblasts as hESC feeders. We used these qualified placental fibroblasts to derive two new hESC lines in knockout Dulbecco's modified Eagle's medium with serum-free 20% knockout serum replacement. The cells, which had a normal karyotype. were grown for more than 25 passages, expressed markers of sternness including Oct-3/4, Tra 1-60, Tra 1-80. and SSEA-4, exhibited high telomerase activity, and differentiated in vitro and in vivo into cells derived from all three germ layers, confirming their pluripotency. Additionally, newly derived hESCs were adapted to Growth on a human placental laminin substrate in a defined medium. Conclusion(s): To our knowledge, this is the first report of hESC derivation in the absence of serum on qualified pathogen-free human feeders. (Fertil Steril® 2005;83:1517-29. © 2005 by American Society for Reproductive Medicine.) C1 Univ Calif San Francisco, Dept Cell & Tissue Biol, Program Human Stem Cell Biol & Dev, San Francisco, CA 94143 USA. Univ Calif San Francisco, Stem Cell Biol Program, San Francisco, CA USA. Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA USA. Geron Corp, Menlo Pk, CA USA. RP Fisher, SL (reprint author), Univ Calif San Francisco, Dept Cell & Tissue Biol, Program Human Stem Cell Biol & Dev, 513 Parnassus, San Francisco, CA 94143 USA. EM sfisher@cgl.ucsf.edu NR 36 TC 125 Z9 144 U1 0 U2 7 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0015-0282 J9 FERTIL STERIL JI Fertil. Steril. PD MAY PY 2005 VL 83 IS 5 BP 1517 EP 1529 DI 10.1016/j.fertnstert.2005.01.086 PG 13 WC Obstetrics & Gynecology; Reproductive Biology SC Obstetrics & Gynecology; Reproductive Biology GA 924WC UT WOS:000229010500030 PM 15866593 ER PT J AU Tatar, R AF Tatar, R TI Geometric transitions, non-Kahler geometries and string vacua SO FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS LA English DT Article; Proceedings Paper CT 37th International Symposium Ahrenshoop on the Theory of Elementary Particles CY AUG 23-27, 2004 CL Berlin, GERMANY SP Humboldt Univ Berlin, Inst Phys, Max Planck Inst Gravitat Phys ID LARGE N-DUALITY; MIRROR SYMMETRY; MATRIX MODELS AB We summarize an explicit construction of a duality cycle for geometric transitions in type II and heterotic theories. We emphasize that the manifolds with torsion constructed with this duality cycle are crucial for understanding different phenomena appearing in effective field theories. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. C1 LBL Berkeley, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Tatar, R (reprint author), LBL Berkeley, Theoret Phys Grp, Berkeley, CA 94720 USA. EM rtatar@socrates.berkeley.edu NR 32 TC 0 Z9 0 U1 0 U2 0 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0015-8208 J9 FORTSCHR PHYS JI Fortschritte Phys.-Prog. Phys. PD MAY-JUN PY 2005 VL 53 IS 5-6 BP 621 EP 625 DI 10.1002/prop.200410299 PG 5 WC Physics, Multidisciplinary SC Physics GA 929LL UT WOS:000229347500033 ER PT J AU Lindesay, J Noyes, HP AF Lindesay, J Noyes, HP TI Construction of non-perturbative, unitary particle-antiparticle amplitudes for finite particle number scattering formalisms SO FOUNDATIONS OF PHYSICS LA English DT Article ID POINCARE-INVARIANT; SELF-CONSISTENT AB Starting from a unitary, Lorentz invariant two-particle scattering amplitude, we show how to use an identification and replacement process to construct a unique, unitary particle-antiparticle amplitude. This process differs from conventional on-shell Mandelstam s, t, u crossing in that the input and constructed amplitudes can be off-diagonal and off-energy shell. Further, amplitudes are constructed using the invariant parameters which are appropriate to use as driving terms in the multi-particle, multichannel non-perturbative, cluster decomposable, relativistic scattering equations of the Faddeev-type integral equations recently presented by Alfred, Kwizera, Lindesay and Noyes. It is therefore anticipated that when so employed, the resulting multi-channel solutions will also be unitary. The process preserves the usual particle-antiparticle symmetries. To illustrate this process, we construct a J=0 scattering length model chosen for simplicity. We also exhibit a class of physical models which contain a finite quantum mass parameter and are Lorentz invariant. These are constructed to reduce in the appropriate limits, and with the proper choice of value and sign of the interaction parameter, to the asymptotic solution of the non-relativistic Coulomb problem, including the forward scattering singularity, the essential singularity in the phase, and the Bohr bound-state spectrum. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Howard Univ, Computat Phys Lab, Washington, DC 20059 USA. RP Lindesay, J (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM jlinesay@fac.howard.edu NR 15 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0015-9018 J9 FOUND PHYS JI Found. Phys. PD MAY PY 2005 VL 35 IS 5 BP 699 EP 741 DI 10.1007/s10701-005-4563-8 PG 43 WC Physics, Multidisciplinary SC Physics GA 937AT UT WOS:000229897600001 ER PT J AU Zinkle, SJ AF Zinkle, SJ TI Overview of the US fusion materials sciences program SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID AUSTENITIC STAINLESS-STEELS; DOSE NEUTRON-IRRADIATION; DISLOCATION-DEFECT INTERACTIONS; STACKING-FAULT TETRAHEDRON; RESEARCH-AND-DEVELOPMENT; FLUX FISSION REACTOR; COPPER-ALLOYS; LOW-TEMPERATURE; PLASTIC INSTABILITY; ENERGY APPLICATIONS AB Highlights of recent U.S. fusion materials research activities are summarized, including multiscale materials modeling and experimental results. Recent first principles atomistic calculations on vanadium and iron-helium have found that previous interatomic potentials incorrectly predict several important point defect properties. Molecular dynamics simulations of displacement cascades are now approaching energies equivalent to 14 MeV fusion neutrons. Considerable effort is being devoted to understanding the fundamental mechanisms of low temperature radiation hardening and embrittlement. Work is also in progress to determine the allowable temperature and dose operating regimes for candidate reduced activation structural materials (including transmutant helium effects). New compositions of reduced activation steels and vanadium alloys with potential for significantly improved properties are being investigated. Due to recent improvements in SiC/SiC ceramic composites, engineering-relevant mechanical property tests are being introduced to re lace historical qualitative screening tests. Materials research in support of the ITER burning plasma physics machine is briefly described. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Zinkle, SJ (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM zinklesj@ornl.gov OI Zinkle, Steven/0000-0003-2890-6915 NR 87 TC 10 Z9 10 U1 3 U2 11 PU AMER NUCLEAR SOC PI LA GRANGE PK PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 821 EP 828 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000003 ER PT J AU Pint, BA More, KL Meyer, HM DiStefano, JR AF Pint, BA More, KL Meyer, HM DiStefano, JR TI Recent progress addressing compatibility issues relevant to fusion environments SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID LIQUID-METAL BLANKETS; VANADIUM ALLOYS; INSULATING COATINGS; FLOWING LITHIUM; CORROSION; CERAMICS; REACTORS; PB-17LI AB Current compatibility research in the U.S. focuses on two topics: dual- or multi-layer electrically-resistant Y2O3/vanadium coatings in a V-Li blanket concept and SiC composites with a Pb-Li coolant. The compatibility issue for multi-layer coatings includes the ceramic insulating layer and the metallic vanadium alloy layer Characterization of Y2O3 coatings after exposure to Li shows significant changes in the microstructure. Initial static capsule results for V-4Cr-4Ti alloys in Li at 800 degrees C showed unexpected small mass gains. Capsule tests of monolithic SiC in Pb-17Li showed no mass change and no wetting after 1000h at 800 degrees C and only limited wetting after 1000h at 1100 degrees C. Chemical analysis of the Pb-Li after the tests did not detect Si to the detectability limit of 30ppma (5 wppm). In both liquid metal systems, loop tests with a representative temperature gradient are needed to truly determine compatibility limits. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Pint, BA (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. EM pintba@ornl.gov RI Pint, Bruce/A-8435-2008; More, Karren/A-8097-2016 OI Pint, Bruce/0000-0002-9165-3335; More, Karren/0000-0001-5223-9097 NR 25 TC 15 Z9 16 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 851 EP 855 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000007 ER PT J AU Hashimoto, N Hunn, JD Parikh, N Gilliam, S Gidcumb, S Patnaik, B Snead, LL AF Hashimoto, N Hunn, JD Parikh, N Gilliam, S Gidcumb, S Patnaik, B Snead, LL TI Helium retention of ion-irradiated and annealed tungsten foils SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB To understand the helium retention characteristics and helium bubble distribution in tungsten, He-3(d,p)He-4 nuclear reaction analysis (NRA) and transmission electron microscopy (TEM) have been performed for two forms of tungsten: single crystal and polycrystalline, implanted up to 1x10(19) He-3/m(2) at 850 degrees C and annealed at 2000 degrees C. The NRA results indicated that as-implanted single crystal and polycrystalline tungsten exhibited similar helium retention characteristics. In addition, a flash anneal at 2000 degrees C had no effect on the retention of helium. However, when 10(19) He/m(2) was implanted into single crystal tungsten in 1000 cycles of 10(16) He/m(2) each followed by a 2000 degrees C flash anneal, the observed helium yield dropped by 95% compared to 70% for polycrystalline tungsten. The microstructure of single crystal tungsten implanted with 1x10(19) He/m(2) and annealed at 2000 degrees C in a single step showed numerous tiny cavities at a depth of similar to 1.6 mu m, while no visible cavities were observed in the 1000 step annealed single crystal. However, in the case of polycrystalline tungsten, a single step annealing led to significant cavity growth at grain boundaries. The reduced He retention suggests a preference for inertial fusion energy armor of single crystal over polycrystalline tungsten. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ N Carolina, Chapel Hill, NC USA. RP Hashimoto, N (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM hashimoton@ornl.gov; nparikh@physics.unc.edu RI HASHIMOTO, Naoyuki/D-6366-2012 NR 7 TC 2 Z9 2 U1 0 U2 4 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 881 EP 885 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000013 ER PT J AU Titus, PH Kalish, M AF Titus, PH Kalish, M TI Seismic analysis of the national compact stellarator experiment (NCSX) SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB DOE requirements as outlined in DOE-STD-1020-2002 are followed for determination of the necessity for seismic qualification of the stellarator and its related systems. IBC-2000 is followed for the qualification requirements The NCSX criteria document[2] provides guidance on load combinations. The stellarator presents minimal occupational hazards and hazards to the public. The qualification effort is intended to preserve the viability of continuing the experiment after an earthquake, and to explore the sensitivity of the design to dynamic loading from sources other than normal operation. A response spectra modal analysis has been employed. The seismic model builds on available conceptual design and design models of the vessel, and modular coil. Outer TF and PF coil models and models of the cold mass supports have been generated and added to form a complete model of the stellarator system. Much of the stellarator is robust to resist normal Lorentz forces. Areas sensitive to lateral loads and dynamic application of non-Lorentz loading, include the nested cylinder cold mass support columns, cantilevered vessel ducts, and the radial guides connecting the vessel ducts and modular coil shell. Loads on these structures are quantified, and design adequacy is assessed. C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08544 USA. RP Titus, PH (reprint author), MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA. EM titus@psfc.mit.edu; mkalish@pppl.gov NR 9 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 906 EP 910 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000018 ER PT J AU Freudenberg, KD Williamson, DE Fan, HM Myatt, L AF Freudenberg, KD Williamson, DE Fan, HM Myatt, L TI Non-linear analysis of the modular coil windings for the national compact stellarator experiment SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB A non linear FEA study has been performed on the modular coils of the National Compact Stellarator Experiment (NCSX). The modular coils provide the primary magnetic field within NCSX and consist of flexible cable conductor wound on a cast and machined winding form and vacuum impregnated with epoxy. Eighteen coils and associated winding forms are connected at assembly into a toroidal shell structure. The purpose of this study was to evaluate the structural response of the windings and shell structure during cooldown and normal operation. Two separate software packages were used for the study, and two independent analyses were undertaken. The first analysis performed with Pro/Mechanica (R), examined both the response of the modular coils to magnetic pressure and thermal effects during a 2 Tesla pulse. Modeled items included a portion of the shell structure the winding packs, and a set of 48 "pseudo clamps". The so called "pseudo clamps" are represented simply by blocks of material that are restrained in their respective normal directions and have properties which mimic the stiffness of the spring washers of the actual preload clamps. The winding pack is free to slide on the shell structure and is restrained only by the clamps. A second model, including the complete shell structure of all three coils, was studied with the FEA program ANSYS (R). Contact regions defined in both Pro/Mechanica and Ansys allow the winding to slide and detach form the shell structure. The two analyses are compared for parameters such as winding/structure gap, overall displacement, equivalent stress and principle strain values. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08544 USA. Myatt Consulting Inc, Norfolk, MA 02056 USA. RP Freudenberg, KD (reprint author), BWXT Y12, Oak Ridge, TN 37831 USA. EM kd2@y12.doe.gov; williamsonde@ornl.gov NR 3 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 911 EP 915 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000019 ER PT J AU Myatt, L Williamson, DE Fan, HM AF Myatt, L Williamson, DE Fan, HM TI Electromagnetic and linear structural analysis of the national compact stellarator experiment (NCSX) modular coil system SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB A detailed electromagnetic-structural ANSYS analysis of the NCSX Modular Coil (MC) system is presented. The simplified (linear) model is used to provide some insights into the essential behavior of the modular coil. In the actual device, the winding packs are Vacuum Pressure Impregnated (VPI'd) in-place and restrained by 50+ clamps per coil. In general, JxB Lorentz forces press the winding pack (WP) onto the structure which makes the linear ("glued") approach justifiable. The benefit, of course, is relatively fast computer run-times and a modeling tool which is able to perform numerous design studies. However, there are regions where the electromagnetic (EM) forces point away from the structure and locally invalidate the glued approximation. The results of a variety of design studies are presented, such as the structural stiffness and worst case running loads at the poloidal breaks, non-ideal coil center displacements from thermal contractions and structural loads, smeared winding pack and winding form stresses, and the effects of supporting the convoluted MC "wings" with the neighboring shell. Critical results are illustrated with contour plots, and where possible, compared to the NCSX structural design criteria. C1 Myatt Consutling Inc, Norfolk, MA 02056 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Myatt, L (reprint author), Myatt Consutling Inc, Norfolk, MA 02056 USA. EM Leonard.Myatt@myattconsulting.com NR 2 TC 1 Z9 1 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 916 EP 920 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000020 ER PT J AU Kozub, T Jurczynski, S Chrzanowski, J AF Kozub, T Jurczynski, S Chrzanowski, J TI Testing of NCSX composite coil material properties SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB The National Compact Stellarator Experiment (NCSX) is now in design and requires 18 modular coils that are constructed to a highly complex geometry. The modular coil conductors are designed as a composite of a fine gauge stranded copper cable shaped to the required geometry and vacuum impregnated with a resin. These composite conductors exhibit unique material properties that must be determined and verified through testing. The conductor material properties are necessary for design modeling and performance validation. This paper will present the methods used to test and measure the coil conductor material properties, the unique challenges in measuring these complex materials at both room and liquid nitrogen temperatures and the results of those tests. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Kozub, T (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM tkozub@pppl.gov NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 921 EP 925 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000021 ER PT J AU Dahlgren, F Brooks, A Goranson, P Cole, M Titus, P AF Dahlgren, F Brooks, A Goranson, P Cole, M Titus, P TI Structural analysis of the NCSX vacuum vessel SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB The NCSX vacuum vessel has a rather unique shape being very closely coupled topologically to the three-fold stellerator symmetry of the plasma it contains. This shape does not permit the use of the common forms of pressure vessel analysis and necessitates the reliance on finite element analysis. The current paper describes the NCSX vacuum vessel stress analysis including external pressure, thermal, and electro-magnetic loading from internal plasma disruptions and bakeout temperatures of up to 400 degrees centigrade. Buckling and dynamic loading conditions are also considered. C1 Art Brooks PPPL, Princeton, NJ 08543 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. RP Dahlgren, F (reprint author), Art Brooks PPPL, POB 451, Princeton, NJ 08543 USA. NR 2 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 926 EP 930 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000022 ER PT J AU Petti, DA Reyes, S Cadwallader, LC Latkowski, JF AF Petti, DA Reyes, S Cadwallader, LC Latkowski, JF TI Status of safety and environmental activities in the US fusion program SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID POWER-PLANT DESIGN; HYLIFE-II; ACCIDENT CONSEQUENCES; ISSUES; ACTIVATION; CLEARANCE; DISPOSAL; HEAT AB This paper presents an overview of recent safety efforts in both magnetic and inertial fusion energy. Safety has been a part of fusion design and operations since the inception of fusion research. Safety research and safety design support have been Provided for a variety of experiments in both the magnetic and inertial fusion programs. The main safety issues are reviewed, some recent safety highlights are discussed and the programmatic impacts that safety research has had are presented. Future directions in the safety and environmental area are proposed. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Petti, DA (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM pti@inel.gov RI Cadwallader, Lee/F-6933-2014 NR 54 TC 3 Z9 3 U1 0 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 949 EP 958 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000026 ER PT J AU Petti, DA Merrill, BJ AF Petti, DA Merrill, BJ TI Future USITER safety studies SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID DUST; CODE AB With the US re-entering the ITER project, the US safety program has been tasked to address safety issues left unresolved during the US absence over the past five years. As a consequence our current and future US ITER safety studies will focus on validating US safety analysis tools that underpin the ITER safety analysis, refining in-vessel dust and tritium inventory safety limits and developing corresponding dust and tritium removal strategies that will demonstrate compliance with ITER limits without hampering operational flexibility of the machine. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Petti, DA (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM pti@inel.gov NR 23 TC 1 Z9 1 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 967 EP 973 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000028 ER PT J AU Savercool, RL Cadwallader, LC AF Savercool, RL Cadwallader, LC TI Activities of the US-Japan safety monitor joint working group SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID OPERATIONS; TFTR AB This paper documents the activities of the US-Japan exchange in the area of personnel safety at magnetic and laser fusion experiments. A near-miss event with a visiting scientist to the US in 1992 was the impetus for forming the Joint Working Group on Fusion Safety. This exchange has been under way for over ten years and has provided many safety insights for both US and Japanese facility personnel at national institutes and at universities. The background and activities of the Joint Working Group are described, including the facilities that have been visited for safety walkthroughs, the participants from both countries, and the main safety issues examined during visits. Based on these visits, some operational safety ideas to enhance experiment safety are given. The near-term future plans of the Safety Monitor Joint Working Group are also discussed. C1 Gen Atom Co, San Diego, CA 92186 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Savercool, RL (reprint author), Gen Atom Co, POB 85608, San Diego, CA 92186 USA. EM savercool@fusion.gat.com RI Cadwallader, Lee/F-6933-2014 NR 15 TC 1 Z9 1 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 974 EP 978 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000029 ER PT J AU Willms, RS AF Willms, RS TI US tritium plant activities for ITER SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID DESIGN AB The US has contributed to ITER Tritium Plant activities since the beginning of the project. Initial contributions were made to the Conceptual Design Activities in the late 1980's. Both R&D and design contributions were made to the Engineering Design Activity in the 1990's. As ITER now moves to construction, the US is slated to build and deliver the Tokamak Exhaust Processing (TEP) system. The main purpose of this system is to recover hydrogen isotopes including those bound in molecules such as water and methane, and deliver purified hydrogen isotopes to the isotope separation system. The TEP construction activity will begin with finalizing the detailed design. Then industry will fabricate the system. This will be followed with factory testing, transportation to the ITER site, installation and final acceptance testing. This system is highly integrated with other Tritium Plant subsystems, so close interactions are expected with other procurement package owners and the ITER International team. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Willms, RS (reprint author), Los Alamos Natl Lab, Mail Stop J964, Los Alamos, NM 87544 USA. EM willms@lanl.gov NR 5 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 979 EP 982 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000030 ER PT J AU Cadwallader, LC AF Cadwallader, LC TI Comparison of tritium component failure rate data SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID ENERGY-RESEARCH-INSTITUTE; SYSTEMS; OPERATION; MAINTENANCE AB Published failure rate values from the US Tritium Systems Test Assembly, the Japanese Tritium Process Laboratory, the German Tritium Laboratory Karlsruhe, and the Joint European Torus Active Gas Handling System have been compared. This comparison is on a limited set of components, but there is a good variety of data sets in the comparison. The data compared reasonably well. The most reasonable failure rate values are recommended for use on next generation tritium handling system components, such as those in the tritium plant systems for the International Thermonuclear Experimental Reactor and the tritium fuel systems of inertial fusion facilities, such as the US National Ignition Facility. These data and the comparison results are also shared with the International Energy Agency cooperative task on fusion component failure rate data. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Cadwallader, LC (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM lcc@inel.gov RI Cadwallader, Lee/F-6933-2014 NR 19 TC 5 Z9 5 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 983 EP 988 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000031 ER PT J AU Cadwallader, LC AF Cadwallader, LC TI Compressed gas safety for experimental fusion facilities SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID PROJECTILE; CYLINDER AB Experimental fusion facilities present a variety of hazards to the operators and staff. There are unique or specialized hazards, including magnetic fields, cryogens, radio frequency emissions, and vacuum reservoirs. There are also more general industrial hazards, such as a wide variety of electrical power, pressurized air and cooling water systems in use, there are crane and hoist loads, working at height, and handling compressed gas cylinders. This paper outlines the projectile hazard associated with compressed gas cylinders and methods of treatment to provide for compressed gas safety. This information should be of interest to personnel at both magnetic and inertial fusion experiments. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Cadwallader, LC (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM lcc@inel.gov RI Cadwallader, Lee/F-6933-2014 NR 16 TC 1 Z9 1 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 989 EP 994 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000032 ER PT J AU Cadwallader, LC AF Cadwallader, LC TI The worker exposure failure modes and effects analysis SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID BURNS; STEAM AB The Worker Exposure Failure Modes and Effects Analysis (WE-FMEA) is a new approach to quantitatively evaluate worker risks from possible failures of co-located equipment in the complex environment of a magnetic or inertial fusion experiment. For next-step experiments such as the International Thermonuclear Experimental Reactor (ITER) or the National Ignition Facility (NIF), the systems and equipment will be larger, handle more throughput or power, and will, in general, be more robust than past experiments. These systems and equipment are necessary to operate the machine, but the rooms are congested with equipment, piping, and cables, which poses a new level of hazard for workers who will perform hands-on maintenance. The WE-FMEA systematically analyzes the nearby equipment and the work environment for equipment failure or inherent hazards, and then develops exposure scenarios. Once identified, the exposure scenarios are evaluated for the worker hazards and quantitative worker risk is calculated. Then risk scenarios are quantitatively compared to existing statistical data on worker injuries; high-risk scenarios can be identified and addressed in more detail to determine the proper means to reduce, mitigate, or protect against the hazard. The WE-FMEA approach is described and a cooling system maintenance example is given. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Cadwallader, LC (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM lcc@inel.gov RI Cadwallader, Lee/F-6933-2014 NR 36 TC 2 Z9 2 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 995 EP 1002 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000033 ER PT J AU Wang, MK Tautges, TJ Henderson, DL El-Guebaly, L Wang, XR AF Wang, MK Tautges, TJ Henderson, DL El-Guebaly, L Wang, XR TI Three-dimensional modeling of complex fusion devices using CAD-MCNPX interface SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB MCNPX's [1] geometric modeling capabilities are limited to Boolean combinations of primitive geometric shapes. These capabilities are not sufficient for simulating particle transport in stellerators, whose geometric models are quite complex. We describe a CAD based implementation of MCNPX where a CAD geometry engine is used directly for solid model representation and evaluation. The application of this code, to calculating the neutron wall loading distribution (Gamma) in the Z and toroidal directions for the ARIES-CS[2] design, is described. C1 Univ Wisconsin, Madison, WI 53706 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Wang, MK (reprint author), Univ Wisconsin, 1500 Engn Dr, Madison, WI 53706 USA. EM mengkuow@cae.wisc.edu; titautg@sandia.gov; henderson@engr.wisc.edu; elguebaly@engr.wisc.edu; wagn@fusion.ucsd.edu NR 6 TC 20 Z9 21 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1079 EP 1083 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000045 ER PT J AU Gohar, Y AF Gohar, Y TI Blanket design and optimization demonstrations of the first wall/blanket/shield design and optimization system (BSDOS) SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB In fusion reactors, the blanket design and its characteristics have a major impact on the reactor performance, size, and economics. The selection and arrangement of the blanket materials, dimensions of the different blanket zones, and different requirements of the selected materials for a satisfactory performance are the main parameters, which define the blanket performance. These parameters translate to a large number of variables and design constraints, which need to be simultaneously considered in the blanket design process. This represents a major design challenge because of the lack of a comprehensive design tool capable of considering all these variables to define the optimum blanket design and satisfying all the design constraints for the adopted figure of merit and the blanket design criteria. The blanket design capabilities of the First Wall/Blanket/Shield Design and Optimization System (BSDOS) have been developed to overcome this difficulty and to provide the state-of-the-art research and design tool for performing blanket design analyses. This paper describes some of the BSDOS capabilities and demonstrates its use. In addition, the use of the optimization capability of the BSDOS can result in a significant blanket performance enhancement and cost saving for the reactor design under consideration. In this paper, examples are presented, which utilize an earlier version of the ITER solid breeder blanket design and a high power density self-cooled lithium blanket design for demonstrating some of the BSDOS blanket design capabilities. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Gohar, Y (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gohar@anl.gov NR 20 TC 0 Z9 0 U1 1 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1106 EP 1118 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000050 ER PT J AU Goodin, DT Alexander, NB Brown, LC Callahan, DA Ebey, PS Frey, DT Gallix, R Geller, DA Gibson, CR Hoffer, JK Maxwell, JL McQuillan, BW Nikroo, A Nobile, A Olson, C Petzoldt, RW Raffray, R Rickman, WS Rochau, G Schroen, DG Sethian, J Sheliak, JD Streit, JE Tillack, M Vermillion, BA Valmianski, EI AF Goodin, DT Alexander, NB Brown, LC Callahan, DA Ebey, PS Frey, DT Gallix, R Geller, DA Gibson, CR Hoffer, JK Maxwell, JL McQuillan, BW Nikroo, A Nobile, A Olson, C Petzoldt, RW Raffray, R Rickman, WS Rochau, G Schroen, DG Sethian, J Sheliak, JD Streit, JE Tillack, M Vermillion, BA Valmianski, EI TI Demonstrating a target supply for inertial fusion energy SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID POWER-PLANT; HEAVY-ION; INJECTION; FABRICATION; DRIVEN; DESIGN AB A central feature of an Inertial Fusion Energy (IFE) power plant is a target that has been compressed and heated to fusion conditions by the energy input of the driver. The technology to economically manufacture and then position cryogenic targets at chamber center is at the heart of future IFE power plants. For direct drive IFE (laser fusion), energy is applied directly to the surface of a spherical CH polymer capsule containing the deuterium-tritium (DT) fusion fuel at approximately 18 K. For indirect drive (heavy ion fusion, HIF), the target consists of a similar fuel capsule within a cylindrical metal container or "hohlraum" which converts the incident driver energy into x-rays to implode the capsule. For either target, it must be accurately delivered to the target chamber center at a rate of about 5-10 Hz, with a precisely predicted target location. Future successful fabrication and injection systems must operate at the low cost required for energy production (about $0.25/target, about 10(4) less than current costs). Z-pinch driven IFE (ZFE) utilizes high current pulses to compress plasma to produce x-rays that indirectly heat a fusion capsule. ZFE target technologies utilize a repetition rate of about 0.1 Hz with a higher yield. This paper provides an overview of the proposed target methodologies for laser fusion, HIF, and ZFE, and summarizes advances in the unique materials science and technology development programs. C1 Gen Atom, San Diego, CA 92186 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. TSD Management Associates, Encinitas, CA 92024 USA. Schafer Corp, SNL, Albuquerque, NM 87185 USA. USN, Res Lab, Washington, DC 20375 USA. RP Goodin, DT (reprint author), Gen Atom, POB 85608, San Diego, CA 92186 USA. EM dan.goodin@gat.com NR 29 TC 4 Z9 4 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1131 EP 1138 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000053 ER PT J AU Olson, RE AF Olson, RE TI Target physics scaling for Z-pinch inertial fusion energy SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID NATIONAL IGNITION FACILITY; CONFINEMENT-FUSION; RELEVANT HOHLRAUMS; X-RAYS; DRIVEN AB The Z-pinch fusion energy power plant concept [1] is based upon an X-ray driven inertial confinement fusion (ICF) capsule having a hypothetical yield of 3 GJ with an overall target gain in the range of 50-100. In the present paper, a combination of analytic arguments, results of radiation-hydrodynamic computational simulations, and empirical scalings from Z-pinch hohlraum experiments are used to demonstrate that the absorption of approximately 6 MJ of X-ray energy by the capsule and 26 MJ by the hohlraum walls of an ICF target (similar to 32 MJ total X-ray input) will be adequate to provide a 3 GJ yield. As a result, it appears that the Ref. 1 assumption of a 3 GJ thermonuclear yield with an overall target gain approaching 100 is conceptually feasible. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Olson, RE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM reolson@sandia.gov NR 31 TC 7 Z9 8 U1 0 U2 1 PU AMER NUCLEAR SOC PI LA GRANGE PK PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA SN 1536-1055 EI 1943-7641 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1147 EP 1151 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000056 ER PT J AU Niederhaus, J Ranjan, D Anderson, M Oakley, J Bonazza, R Greenough, J AF Niederhaus, J Ranjan, D Anderson, M Oakley, J Bonazza, R Greenough, J TI Inertial-fusion-related hydrodynamic instabilities in a spherical gas bubble accelerated by a planar shock wave SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison AB Experiments studying the compression and unstable growth of a dense spherical bubble in a gaseous medium subjected to a strong planar shock wave (2.8 < M < 3.4) are performed in a vertical shock tube. The test gas is initially contained in a free-falling spherical soap-film, bubble and the shocked bubble is imaged using planar laser diagnostics. Concurrently, simulations are carried out using a compressible hydrodynamics code in r-z axisymmetric geometry. Experiments and computations indicate the formation of characteristic vortical structures in the post-shock flow, due to Richtmyer-Meshkov and Kelvin-Helmholtz instabilities, and smaller-scale vortices due to secondary effects. Inconsistencies between experimental and computational results are examined, and the usefulness of the current axisymmetric approach is evaluated. C1 Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Niederhaus, J (reprint author), Univ Wisconsin, Dept Engn Phys, 1500 Engn Dr, Madison, WI 53706 USA. EM bonazza@engr.wisc.edu OI Ranjan, Devesh/0000-0002-1231-9313 NR 9 TC 2 Z9 2 U1 0 U2 5 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1160 EP 1164 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000058 ER PT J AU Debonnel, CS Wang, TX Suzuki, M Garcia, E Peterson, PF AF Debonnel, CS Wang, TX Suzuki, M Garcia, E Peterson, PF TI Visual tsunami: A versatile, user-friendly, multidimensional ablation and gas-dynamics design code SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID HYLIFE-II REACTOR; CENTRAL CAVITY; TRANSPORT; DENSITY AB Gas dynamics phenomena in thick-liquid protected inertial fusion target chambers have been explored since the earl), 1990's with the help of a series of simulation codes known as TSUNAMI. The code has been recently redesigned entirely to make use of modem programming techniques, languages and software; improve its user-friendliness; and refine its ability to model thick-liquid protected chambers, while expanding its capability to a larger variety of systems. The new code is named "Visual Tsunami" to emphasize the programming language of its core, Fortran 95, as well as its graphics-based input file builder and output processors. It is aimed at providing a user-friendly design tool for complex systems for which transient gas dynamics phenomena play a key role. C1 Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Debonnel, CS (reprint author), Univ Calif Berkeley, 4118 Etcheverry Hall, Berkeley, CA 94720 USA. EM debonnel@nuc.berkeley.edu NR 21 TC 2 Z9 2 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1165 EP 1169 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000059 ER PT J AU Stacey, WM Mandrekas, J Hoffman, EA AF Stacey, WM Mandrekas, J Hoffman, EA TI Sub-critical transmutation reactors with tokamak fusion neutron sources SO FUSION SCIENCE AND TECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Topical Meeting on the Technology of Fusion Energy CY SEP 14-16, 2004 CL Madison, WI SP Amer Nucl Soc Fusion Energy Div, Amer Nucl Soc Wisconsin Local Sect, Atomic Energy Soc Japan Fusion Energy Div, US DOE, Univ Wisconsin Madison ID WASTE REACTOR AB The principal results of a series of design scoping studies of sub-critical fast transmutation reactors (based on the nuclear and processing technology being developed in the USDoE Generation IV, Advanced Fuel Cycle and Next Generation Nuclear Plant programs) coupled with a tokamak fusion neutron source (based on the ITER design basis physics and technology) are presented. C1 Georgia Inst Technol, Fus Res Ctr, Atlanta, GA 30332 USA. Argonne Natl Lab, Div Nucl Engn, Argonne, IL 60439 USA. RP Stacey, WM (reprint author), Georgia Inst Technol, Fus Res Ctr, Atlanta, GA 30332 USA. NR 27 TC 10 Z9 10 U1 1 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 1536-1055 J9 FUSION SCI TECHNOL JI Fusion Sci. Technol. PD MAY PY 2005 VL 47 IS 4 BP 1210 EP 1218 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 921GU UT WOS:000228753000067 ER PT J AU Scheetz, TE Trivedi, N Pedretti, KT Braun, TA Casavant, TL AF Scheetz, TE Trivedi, N Pedretti, KT Braun, TA Casavant, TL TI Gene transcript clustering: a comparison of parallel approaches SO FUTURE GENERATION COMPUTER SYSTEMS LA English DT Article; Proceedings Paper CT 7th International Conference on Parallel Computing Technologies (PaCT 2003) CY SEP 15-19, 2003 CL NIZHNII NOVGOROD, RUSSIA SP Russian Acad Sci, Russian Fund Basic Res, Russian State Comm Higher Educ, IBM, Intel DE parallel algorithms; performance measurement; genome analysis; mRNA clustering; bioinformatics ID EXPRESSED SEQUENCE TAGS AB One of the fundamental components of large-scale gene discovery projects is that of clustering of expressed sequence tags (ESTs) from complementary DNA (cDNA) clone libraries. Clustering is used to create non-redundant catalogs and indices of these sequences. In particular, clustering of ESTs is frequently used to estimate the number of genes derived from cDNA-based gene discovery efforts. This paper presents a novel parallel extension to an EST clustering program, UIcluster4, that incorporates alternative splicing information and a new parallelization strategy. The results are compared to other parallelized EST clustering systems in terms of overall processing time and in accuracy of the resulting clustering. (c) 2004 Published by Elsevier B.V. C1 Univ Iowa, Dept Elect & Comp Engn, Ctr Bioinformat & Computat Biol, Iowa City, IA 52242 USA. Univ Iowa, Dept Biomed Engn, Ctr Bioinformat & Computat Biol, Iowa City, IA 52242 USA. Univ Iowa, Dept Ophthalmol & Visual Sci, Ctr Bioinformat & Computat Biol, Iowa City, IA 52242 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. RP Scheetz, TE (reprint author), Univ Iowa, Dept Elect & Comp Engn, Ctr Bioinformat & Computat Biol, Iowa City, IA 52242 USA. EM tscheetz@eng.uiowa.edu NR 10 TC 5 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-739X J9 FUTURE GENER COMP SY JI Futur. Gener. Comp. Syst. PD MAY PY 2005 VL 21 IS 5 BP 731 EP 735 DI 10.1016/j.future.2004.05.014 PG 5 WC Computer Science, Theory & Methods SC Computer Science GA 934ON UT WOS:000229718200014 ER PT J AU Criscenti, LJ Brantley, SL Mueller, KT Tsomaia, N Kubicki, JD AF Criscenti, LJ Brantley, SL Mueller, KT Tsomaia, N Kubicki, JD TI Theoretical and Al-27 CPMAS NMR investigation of aluminum coordination changes during aluminosilicate dissolution SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Review ID MOLECULAR-ORBITAL CALCULATIONS; X-RAY REFLECTIVITY; AB-INITIO CALCULATIONS; DENSITY-FUNCTIONAL THEORY; ATOMIC-FORCE MICROSCOPY; ALBITE-WATER SYSTEM; VALENCE BASIS-SETS; HIGH-RESOLUTION; FELDSPAR DISSOLUTION; MAS NMR AB Ab initio molecular orbital calculations were performed, and Al-27 CP MAS-NMR spectra were evaluated in order to investigate the possible tetrahedral to octahedral coordination change of Al at the feldspar-water interface under acidic conditions. Aluminum coordination is octahedral in solution, and tetrahedral in feldspar crystals. Whether this change in coordination can occur on feldspar surfaces as part of the dissolution mechanism has been debated. Molecular orbital calculations were performed on aluminosilicate clusters with a few surrounding water molecules to partially account for solvation effects at the feldspar-water interface. The calculations on both fully-relaxed and partially-constrained clusters suggest that the energy difference between Al-[4] and Al-[6] where both are linked to three Si-tetrahedra (i.e., Q(3) Al) in the feldspar structure, is small enough to allow for the conversion of Q(3) Al-[4] to Q(3) Al-[6] in a hydrated layer of feldspar, prior to the release of Al ions to the aqueous solution. The introduction of a few water molecules to the clusters introduced the possibility of multiple optimized geometries for each Al coordination, with energy differences on the order of several hydrogen bonds. The calculation of activation energies and transition states between Q(3) Al-[4], Q(3) Al-[5], and Q(3) Al-[6] was complicated by the introduction of water molecules and the use of fully-relaxed alummosilicate clusters. Calculated isotropic shifts for Q(1) Al-[6], Q(2) Al-[6], and Q(3) Al-[6] suggest that the Al-[6] observed on aluminosilicate glass surfaces using 27 Al CP MAS-NMR is Q(1) Al-[6] and therefore formed as part of the dissolution process. The formation of Al-[6] in situ on a feldspar surface (as opposed to re-precipitation from solution) has significant implications for the dissolution mechanism and surface chemistry of feldspars. Copyright (c) 2005 Elsevier Ltd. C1 Sandia Natl Labs, Dept Geochem, Albuquerque, NM 87185 USA. Penn State Univ, Dept Geosci, University Pk, PA 16802 USA. Penn State Univ, Dept Chem, University Pk, PA 16802 USA. Brown Univ, Div Biol & Med, Dept Mol Pharmacol, Providence, RI 02912 USA. RP Criscenti, LJ (reprint author), Sandia Natl Labs, Dept Geochem, POB 5800, Albuquerque, NM 87185 USA. EM ljcrisc@sandia.gov RI Mueller, Karl/A-3637-2010; Kubicki, James/I-1843-2012 OI Kubicki, James/0000-0002-9277-9044 NR 106 TC 40 Z9 40 U1 3 U2 30 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 EI 1872-9533 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY 1 PY 2005 VL 69 IS 9 BP 2205 EP 2220 DI 10.1016/j.gca.2004.10.020 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 922AK UT WOS:000228807800003 ER PT J AU Panfili, FR Manceau, A Sarret, G Spadini, L Kirpichtchikova, T Bert, V Laboudigue, A Marcus, MA Ahamdach, N Libert, MF AF Panfili, FR Manceau, A Sarret, G Spadini, L Kirpichtchikova, T Bert, V Laboudigue, A Marcus, MA Ahamdach, N Libert, MF TI The effect of phytostabilization on Zn speciation in a dredged contaminated sediment using scanning electron microscopy, X-ray fluorescence, EXAFS spectroscopy, and principal components analysis SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID INTERACTIONS CONTROLLING ZINC; SOIL FERROMANGANESE NODULES; TRISTATE MINING DISTRICT; IN-SITU REMEDIATION; QUANTITATIVE SPECIATION; HEAVY-METALS; LEAD CONCENTRATIONS; SURFACE WATERS; MINE TAILINGS; MU-SXRF AB The maintenance of waterways generates large amounts of dredged sediments, which are deposited on adjacent land surfaces. These sediments are often rich in metal contaminants and present a risk to the local environment. Understanding how the metals are immobilized at the molecular level is critical for formulating effective metal containment strategies such as phytoremediation. In the present work, the mineralogical transformations of Zn-containing phases induced by two graminaceous plants (Agrostis tenuis and Festuca rubra) in a contaminated sediment ([Zn] = 4700 mg kg(-1), [P2O5] = 7000 mg kg(-1), pH = 7.8), untreated or amended with hydroxylapatite (AP) or Thomas basic slag (TS), were investigated after two yr of pot experiment by scanning electron microscopy coupled with energy-dispersive spectrometry (SEM-EDS), synchrotron-based X-ray microfluorescence (mu-SXRF), and powder and laterally resolved extended X-ray absorption fine structure (mu-EXAFS) spectroscopy. The number and nature of Zn species were evaluated by principal component (PCA) and least-squares fitting (LSF) analysis of the entire set of mu-EXAFS spectra, which included up to 32 individual spectra from regions of interest varying in chemical composition. Seven Zn species were identified at the micrometer scale: sphalerite, gahnite, franklinite, Zn-containing ferrihydrite and phosphate, (Zn-Al)-hydrotalcite, and Zn-substituted kerolite-like trioctahedral phyllosilicate. Bulk fractions of each species were quantified by LSF of the powder EXAFS spectra to linear combinations of the identified Zn species spectra. In the untreated and unvegetated sediment, Zn was distributed as similar to 50% (mole ratio of total Zn) sphalerite, similar to 40% Zn-ferrihydrite, and similar to 10 to 20% (Zn-Al)-hydrotalcite plus Zn-phyllosilicate. In unvegetated but amended sediments (AP and TS), ZnS and Zn-ferrihydrite each decreased by 10 to 20% and were replaced by Zn-phosphate (similar to 30 similar to 40%). In the presence of plants, ZnS was almost completely dissolved, and the released Zn bound to phosphate (similar to 40 similar to 60%) and to Zn phyllosilicate plus (Zn,Al)-hydrotalcite (similar to 20-40%). Neither the plant species nor the coaddition of mineral amendment affected the Zn speciation in the vegetated sediment. The sediment pore waters were supersaturated with respect to Zn-containing trioctahedral phyllosilicate, near saturation with respect to Zn-phosphate, and strongly undersaturated with respect to (Zn,Al)hydrotalcite. Therefore, the formation of (Zn,Al)-hydrotalcite in slightly alkaline conditions ought to result from heterogeneous precipitation on mineral surface. Copyright (c) 2005 Elsevier Ltd. C1 Univ J Fourier, LGIT, Environm Geochem Grp, F-38041 Grenoble, France. CNRS, F-38041 Grenoble, France. CNRSSP, F-59505 Douai, France. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. IRSN, LESTS, F-92265 Fontenay Aux Roses, France. CEA CADARACHE, F-13108 St Paul Les Durance, France. RP Manceau, A (reprint author), Univ J Fourier, LGIT, Environm Geochem Grp, BP 53, F-38041 Grenoble, France. EM Alain.Manceau@ujf-grenoble.fr RI Laboudigue, Agnes/B-9025-2013; Beamline, FAME/G-9313-2012; Sarret, Geraldine/I-2797-2016 NR 128 TC 78 Z9 79 U1 5 U2 46 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY 1 PY 2005 VL 69 IS 9 BP 2265 EP 2284 DI 10.1016/j.gca.2004.10.017 PG 20 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 922AK UT WOS:000228807800007 ER PT J AU Fialips, CI Carey, JW Bish, DL AF Fialips, CI Carey, JW Bish, DL TI Hydration-dehydration behavior and thermodynamics of chabazite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID NEUTRON POWDER DIFFRACTION; HYDROGEN-BONDED WATER; THERMAL-EXPANSION; CATION LOCATIONS; X-RAY; ZEOLITES; CLINOPTILOLITE; LAUMONTITE; MOLECULES; CALCIUM AB Equilibrium in the chabazite-H2O System was investigated by isothermal thermogravimetric analysis over a large range of temperatures (from 23 to 315 degrees C) and H2O-vapor pressures (from 0.03 to 28 mbar). Thermodynamic analysis of the phase-equilibrium data revealed the existence of three energetically distinct types of H2O, referred to as S-1, S-2, and S-3. At 23 degrees C and 26 mbar of H2O-vapor pressure, chabazite has maximum H2O occupancies of 8.2, 11.1, and 3.1 wt.% for S-1, S-2, and S-3, respectively. During dehydration, S-1 H2O is lost first, followed by S-2 H2O and then S-3 H2O, with significant overlap for S-1 and S-2 as well as S-2 and S-3. The thermodynamics of chabazite-H2O were modeled using three independent equilibrium formulations for S-1, S-2, and S-3. These formulations yielded standard-state molar Gibbs free energy of hydration of -21.8 +/- 0.6, -52.1 +/- 1.8, and -111.7 +/- 6.7 kJ/mol for S-1, S-2, and S-3. Standard-state molar enthalpies of hydration for each type of H2O are -65.6 +/- 0.5, -100.1 +/- 1.6, and -156.9 +/- 6.2 kJ/mol, respectively. Integral molar values for the Gibbs free energy of hydration for each type of H2O are -19.0 +/- 0.7, -40.1 +/- 2.1, and -76.9 +/- 9.6 kJ/mol, respectively. Integral molar values for the enthalpy of hydration for each type of H2O are -62.8 +/- 0.6, - 88.1 +/- 1.9, and - 122.2 +/- 9.3 kJ/mol, respectively. Integration of the predicted total partial molar enthalpy of hydration for all three types of H2O over the full H2O content of chabazite gave an integral molar enthalpy of -39.65 +/- 9.3 kJ/mol relative to liquid water. The thermodynamic data obtained for the hydration of natural chabazite were used to predict the hydration state of chemically similar chabazites under various temperatures and P-H2O, ranging from 25 to 400 degrees C and from 10(-5) to 10(4) bars. Copyright (c) 2005 Elsevier Ltd. C1 Univ Newcastle Upon Tyne, Sch Civil Engn & Geosci, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA. RP Fialips, CI (reprint author), Univ Newcastle Upon Tyne, Sch Civil Engn & Geosci, Drummond Bldg, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England. EM C.I.M.Fialips@newcastle.ac.uk RI Carey, James/B-4421-2011 NR 27 TC 20 Z9 20 U1 1 U2 14 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY 1 PY 2005 VL 69 IS 9 BP 2293 EP 2308 DI 10.1016/j.gca.2004.11.007 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 922AK UT WOS:000228807800009 ER PT J AU Aciego, S DePaolo, D Kennedy, B Christensen, J AF Aciego, S DePaolo, D Kennedy, B Christensen, J TI U-Th/He dating of basalt SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM aciego@eps.berkeley.edu RI Christensen, John/D-1475-2015 NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A322 EP A322 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701034 ER PT J AU Amonette, JE Sarathy, V Linehan, JC Matson, DW Wang, C Nurmi, JT Pecher, K Penn, RL Tratnyek, PG Baer, DR AF Amonette, JE Sarathy, V Linehan, JC Matson, DW Wang, C Nurmi, JT Pecher, K Penn, RL Tratnyek, PG Baer, DR TI Chemistry of metallic iron nanoparticles SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99354 USA. Oregon Hlth Sci Univ, Dept Environm & Biomol Syst, Beaverton, OR 97006 USA. Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA. EM jim.amonette@pnl.gov; penn@chem.umn.edu; tratnyek@ebs.ogi.edu RI Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 0 TC 3 Z9 3 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A263 EP A263 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700511 ER PT J AU Andrade, CF Jamieson, HE Walker, SR Lanzirotti, A Praharaj, T Fortin, D AF Andrade, CF Jamieson, HE Walker, SR Lanzirotti, A Praharaj, T Fortin, D TI Transformation of arsenic species in solids and porewaters from Yellowknife Bay, NWT, Canada SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Queens Univ, Kingston, ON, Canada. Univ Chicago, Brookhaven Natl Lab, Consortium Adv Radiat Sci, Chicago, IL 60637 USA. Univ Ottawa, Dept Earth Sci, Ottawa, ON K1N 6N5, Canada. EM candrade@geoladm.geol.queensu.ca NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A616 EP A616 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702012 ER PT J AU Anovitz, LM Riciputi, LR Cole, DR Fayek, M AF Anovitz, LM Riciputi, LR Cole, DR Fayek, M TI "Hydration" of rhyolitic glasses: Comparison between high- and low-temperature processes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RI Anovitz, Lawrence/P-3144-2016 OI Anovitz, Lawrence/0000-0002-2609-8750 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A492 EP A492 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701367 ER PT J AU Arai, Y Bargar, JR Davis, JA AF Arai, Y Bargar, JR Davis, JA TI Effects of monomeric silicate anion on uranyl adsorption and surface speciation at the hematite-water interface SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID COMPLEXES C1 US Geol Survey, Menlo Pk, CA 94025 USA. Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA. EM yarai@usgs.gov; bargar@slac.stanford.edu; jadavis@usgs.gov NR 3 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A620 EP A620 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702019 ER PT J AU Bagus, PS Ilton, ES AF Bagus, PS Ilton, ES TI Rigorous theoretical determination of L-edge soft X-ray absorption spectra for transition metal complexes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ N Texas, Dept Chem, Denton, TX 76203 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. EM bagus@unt.edu; eugene.ilton@pnl.gov RI Bagus, Paul/M-1273-2015 NR 2 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A601 EP A601 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701577 ER PT J AU Bank, TL Jardine, PM Ginder-Vogel, M Fendorf, SE Baldwin, ME AF Bank, TL Jardine, PM Ginder-Vogel, M Fendorf, SE Baldwin, ME TI Discerning geochemical and biogeochemical metal reduction through gamma sterilization SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. EM banktl@oml.gov; jardinepm@oml.gov; gindervm@pangaea.stanford.edu; fendorf@stanford.edu; baldwinme@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A464 EP A464 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701313 ER PT J AU Bargar, JR Fuller, CC Webb, SM Tebo, BM AF Bargar, JR Fuller, CC Webb, SM Tebo, BM TI Nanoparticulate bacteriogenic manganese oxides: Environmental reactivity and stuctural chemistry SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. US Geol Survey, Div Water Resources, Menlo Pk, CA 94025 USA. Scripps Inst Oceanog, La Jolla, CA 92037 USA. EM bargar@ssrl.slac.stanford.edu; ccfuller@usgs.gov; samwebb@slac.stanford.edu; btebo@ucsd.edu RI Webb, Samuel/D-4778-2009 OI Webb, Samuel/0000-0003-1188-0464 NR 0 TC 1 Z9 1 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A461 EP A461 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701306 ER PT J AU Benzerara, K Yoon, TH Menguy, N Guyot, F Tyliszczak, T Brown, GE AF Benzerara, K Yoon, TH Menguy, N Guyot, F Tyliszczak, T Brown, GE TI Nanoscale environments associated with bioweathering of a Mg-Fe-pyroxene SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. Univ Paris 07, Lab Mineral Cristallog, Paris, France. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Stanford Synchrotron Radiat Lab, SLAC, Menlo Pk, CA 94025 USA. EM benzerar@lmcp.jussieu.fr RI MENGUY, Nicolas/F-5607-2012 OI MENGUY, Nicolas/0000-0003-4613-2490 NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A460 EP A460 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701304 ER PT J AU Boily, JF AF Boily, JF TI Calibration of surface complexation reactions with zeta potentials SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. EM boily@pnl.gov NR 0 TC 0 Z9 0 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A43 EP A43 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700085 ER PT J AU Bond, DL Davis, JA Zachara, JM AF Bond, DL Davis, JA Zachara, JM TI Chemical factors controlling U(VI) mobility in a Hanford aquifer SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 US Geol Survey, Menlo Pk, CA 94025 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. EM dlbond@usgs.gov; jadavis@usgs.gov; john.zachara@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A478 EP A478 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701341 ER PT J AU Boyanov, MI O'Loughlin, EJ Kelly, SD Roden, EE Fein, JB Kemner, KM AF Boyanov, MI O'Loughlin, EJ Kelly, SD Roden, EE Fein, JB Kemner, KM TI Reduction of U by adsorbed vs. surface-precipitated Fe(II) at model cell surfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Alabama, Tuscaloosa, AL USA. Univ Notre Dame, Notre Dame, IN 46556 USA. EM mboyanov@anl.gov; OLoughlin@anl.gov; SKelly@anl.gov; eroden@bama.ua.edu; fein@nd.edu; kemner@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A367 EP A367 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701122 ER PT J AU Brown, CF Geiszler, KN Legore, VL AF Brown, CF Geiszler, KN Legore, VL TI Extraction and quantitative analysis of iodine in solid matrices SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM christoper.brown@pnl.gov; Keith.Geiszler@pnl.gov; virginia.legore@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A717 EP A717 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702210 ER PT J AU Bylaska, E Valiev, M Bogatko, S Weare, J AF Bylaska, E Valiev, M Bogatko, S Weare, J TI First-principles simulation of solvation structure and deprotonation reactions in very nonideal solutions SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. EM eric.bylaska@pnl.gov; marat.valiev@pnl.gov; sbogatko@chem.ucsd.edu; jweare@ucsd.edu RI Bogatko, Stuart/C-8394-2013 OI Bogatko, Stuart/0000-0001-9759-2580 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A505 EP A505 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701393 ER PT J AU Bylaska, EJ Tsemekhman, K Ilton, ES Rosso, KM AF Bylaska, EJ Tsemekhman, K Ilton, ES Rosso, KM TI Self-consistent self-interaction corrected DFT studies of annite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Washington, Seattle, WA 98195 USA. EM eric.bylaska@pnl.gov; kirilt@ikazki01.chem.washington.edu; eugene.ilton@pnl.gov; kevin.rosso@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A362 EP A362 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701112 ER PT J AU Carroll, S Alai, M Craig, L Gdowski, G Hailey, P Nguyen, QA Rard, J Staggs, K Sutton, M Wolery, T AF Carroll, S Alai, M Craig, L Gdowski, G Hailey, P Nguyen, QA Rard, J Staggs, K Sutton, M Wolery, T TI Chemical environment at waste package surfaces in a high-level radioactive waste repository SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM carroll6@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A412 EP A412 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701211 ER PT J AU Catalano, JG Wang, ZM McKinley, JP Zachara, JM Heald, SM Brown, GE AF Catalano, JG Wang, ZM McKinley, JP Zachara, JM Heald, SM Brown, GE TI Probing uranium speciation in contaminated Hanford sediments SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. SLAC, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. EM catalano@anl.gov RI Catalano, Jeffrey/A-8322-2013; Wang, Zheming/E-8244-2010 OI Catalano, Jeffrey/0000-0001-9311-977X; Wang, Zheming/0000-0002-1986-4357 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A474 EP A474 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701333 ER PT J AU Cecil, LD AF Cecil, LD TI Environmental change recorded in mid-latitude ice cores from southern North America and Central Asia: Comparison of chlorine-36 and iodine-129 profiles and the implications for stewardship of the environment SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 US Geol Survey, Idaho Falls, ID 83402 USA. EM ldcecil@usgs.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A712 EP A712 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702201 ER PT J AU Cervini-Silva, J Gilbert, B Fakra, S Banfield, J AF Cervini-Silva, J Gilbert, B Fakra, S Banfield, J TI A molecular approach towards understanding the biogenic formation of CeO2 and its interactions with biomolecules SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Berkeley, CA USA. EM javiera@eps.berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A586 EP A586 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701548 ER PT J AU Chambers, SA AF Chambers, SA TI Soft X-ray absorption and emission spectroscopies as probes of metal dopants and clusters SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM sa.chambers@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A599 EP A599 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701573 ER PT J AU Chialvo, AA Horita, J AF Chialvo, AA Horita, J TI Isotopic effect on phase equilibria of pure fluids and mixtures: Molecular simulation, theory and experiment SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM chialvoaa@ornl.gov; horitaj@ornl.gov NR 1 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A506 EP A506 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701394 ER PT J AU Clark, SB Felmy, AR Qafoku, O Wang, ZM AF Clark, SB Felmy, AR Qafoku, O Wang, ZM TI Thermochemical data to describe actinide partitioning to bacteria: A mixed solvent approach SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Pacific NW Natl Lab, Richland, WA USA. EM s_clark@wsu.edu; ar.felmy@pnl.gov; Odeta.Qafoku@pnl.gov; zheming.wang@pnl.gov RI Wang, Zheming/E-8244-2010 OI Wang, Zheming/0000-0002-1986-4357 NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A418 EP A418 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701223 ER PT J AU Cliff, JB Gaspar, DJ Bottomley, PJ Myrold, DD AF Cliff, JB Gaspar, DJ Bottomley, PJ Myrold, DD TI Microbial C and N assimilation in soils and model systems as revealed by ToF-SIMS SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Oregon State Univ, Corvallis, OR 97331 USA. EM john.cliff@pnl.gov; daniel.gaspar@pnl.gov; peter.bottomley@oregonstate.edu; david.myrold@oregonstate.edu RI Cliff, John/C-7696-2011; Myrold, David/E-1813-2011; Gaspar, Dan/H-6166-2011 OI Cliff, John/0000-0002-7395-5604; Myrold, David/0000-0001-6418-226X; NR 0 TC 1 Z9 1 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A527 EP A527 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701435 ER PT J AU Cole, DR Labotka, TC Larson, PB More, KL Kenik, EA Fayek, M Stadermann, FJ Riciputi, LR AF Cole, DR Labotka, TC Larson, PB More, KL Kenik, EA Fayek, M Stadermann, FJ Riciputi, LR TI Mineral reaction interfaces and associated porosity generation SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA. Washington State Univ, Dept Geol, Pullman, WA 99164 USA. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Washington Univ, Dept Phys, St Louis, MO 63130 USA. EM coledr@ornl.gov RI More, Karren/A-8097-2016 OI More, Karren/0000-0001-5223-9097 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A169 EP A169 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700330 ER PT J AU Cooke, DJ Kerisit, S Marmier, A Parker, SC AF Cooke, DJ Kerisit, S Marmier, A Parker, SC TI Atomistic simulation of the mineral-water interface in contact with charged surfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England. Pacific NW Natl Lab, Richland, WA 99352 USA. EM sebastien.kerisit@pnl.gov; s.c.parker@bath.ac.uk RI Parker, Steve/C-8180-2011 OI Parker, Steve/0000-0003-3804-0975 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A40 EP A40 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700078 ER PT J AU Cooper, DC Hull, LC Wright, KE AF Cooper, DC Hull, LC Wright, KE TI Geochemical modeling of decontamination solutions for building surfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 INEEL Geosci Res, Idaho Falls, ID 83415 USA. EM coopc@inel.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A156 EP A156 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700304 ER PT J AU De Yoreo, JJ Chernov, AA Zepeda-Ruiz, LA Wasylenki, LE Elhadj, S Orme, CA Gilmer, G Dove, PM AF De Yoreo, JJ Chernov, AA Zepeda-Ruiz, LA Wasylenki, LE Elhadj, S Orme, CA Gilmer, G Dove, PM TI A kink-site limited model for growth and inhibition of biominerals SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. EM deyoreo1@llnl.gov; alex.chemov@msfc.nasa.gov; zepedaruiz1@llnl.gov; waz@asu.edu; elhadj@vt.edu; orme1@llnl.gov; gilmer1@llnl.gov; dove@vt.edu RI Dove, Patricia/A-7911-2010; Orme, Christine/A-4109-2009 NR 0 TC 1 Z9 1 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A481 EP A481 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701345 ER PT J AU De Yoreo, JJ Dove, PM AF De Yoreo, JJ Dove, PM TI Stereochemical recognition revisited: A step-specific model for shape control SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA USA. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. EM deyoreo1@llnl.gov; dove@vt.edu RI Dove, Patricia/A-7911-2010 NR 0 TC 0 Z9 0 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A117 EP A117 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700228 ER PT J AU Denoncourt, CL Licciardi, JM Stone, JO Finkel, RC AF Denoncourt, CL Licciardi, JM Stone, JO Finkel, RC TI Calibrating the production rate of cosmogenic Cl-36 from postglacial lava flows in Iceland SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID HE-3 PRODUCTION-RATES C1 Univ New Hampshire, Dept Earth Sci, Durham, NH 03820 USA. Univ Washington, Quaternary Res Ctr, Seattle, WA 98195 USA. Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. EM cld2@unh.edu; joe.licciardi@unh.edu; stone@geology.washington.edu; finkel1@llnl.gov NR 5 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A159 EP A159 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700310 ER PT J AU Deore, SW Mazeina, L Navrotsky, A Tamura, N Fakra, S AF Deore, SW Mazeina, L Navrotsky, A Tamura, N Fakra, S TI Size-structure relationship of beta-akaganeite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID POWDER DIFFRACTION C1 Univ Calif Davis, Thermochem Facil, Davis, CA 95616 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM swdeore@ucdavis.edu NR 4 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A806 EP A806 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702380 ER PT J AU DePaolo, DJ Smith, MM AF DePaolo, DJ Smith, MM TI Isotopic effects in reactive fluid-rock systems with fracture-dominated flow and matrix diffusion SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM depaolo@eps.berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A174 EP A174 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700340 ER PT J AU Dixit, S Knauss, KG Carroll, SA AF Dixit, S Knauss, KG Carroll, SA TI Effect of solution saturation state on diopside dissolution SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM dixit2@llnl.gov; knauss@llnl.gov; carroll6@llnl.gov NR 0 TC 0 Z9 0 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A777 EP A777 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702325 ER PT J AU Dohnalkova, A Kennedy, D Marshall, M Gorby, Y Elias, D Fredrickson, J AF Dohnalkova, A Kennedy, D Marshall, M Gorby, Y Elias, D Fredrickson, J TI Imaging and analysis of biominerals and nanostructures associated with bacterial membranes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM Alice.dohnalkova@pnl.gov RI Elias, Dwayne/B-5190-2011 OI Elias, Dwayne/0000-0002-4469-6391 NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A673 EP A673 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702123 ER PT J AU Donahoe, RJ Yang, L Lanzirotti, A AF Donahoe, RJ Yang, L Lanzirotti, A TI Speciation and surface complexation of As on hydrous ferric oxide in soils modified by in situ chemical fixation SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RI YANG, LI/F-9392-2010 NR 0 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A616 EP A616 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702011 ER PT J AU Dutrow, BL Foster, CT Gable, CW Travis, BJ AF Dutrow, BL Foster, CT Gable, CW Travis, BJ TI Heat and mass transport modeling and rates of metamorphic processes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA. Univ Iowa, Dept Geosci, Iowa City, IA 52242 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM dutrow@lsu.edu RI Gable, Carl/B-4689-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A401 EP A401 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701188 ER PT J AU Esser, BK Beller, HR Carle, SF Hudson, GB Kane, SR LeTain, TE McNab, WW Moran, JE AF Esser, BK Beller, HR Carle, SF Hudson, GB Kane, SR LeTain, TE McNab, WW Moran, JE TI New approaches to characterizing microbial denitrification in the saturated zone SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM bkesser@llnl.gov; beller2@llnl.gov; carle1@llnl.gov; hudson5@llnl.gov; kane11@llnl.gov; letain2@llnl.gov; mcnabl@llnl.gov; moran10@llnl.gov RI Esser, Bradley/G-4283-2010; Beller, Harry/H-6973-2014 OI Esser, Bradley/0000-0002-3219-4298; NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A229 EP A229 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700445 ER PT J AU Fabryka-Martin, JT AF Fabryka-Martin, JT TI Divergent behaviors in global geochemical cycling of bromine and chlorine SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Los Alamos Natl Lab, Los Alamos, NM USA. EM fabryka@lanl.gov NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A710 EP A710 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702196 ER PT J AU Fayek, M Utsunomiya, S Ewing, RC Simmons, A AF Fayek, M Utsunomiya, S Ewing, RC Simmons, A TI Natural uranium getters in near surface environments at the Nopal I deposit, Pena Blanca, Mexico SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Tennessee, Dept Earth Planet Sci, Knoxville, TN 37996 USA. Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM mfayek@utk.edu; utu@umich.edu; asimmons@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A474 EP A474 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701332 ER PT J AU Fayek, M Palenik, CS Ewing, RC AF Fayek, M Palenik, CS Ewing, RC TI Characterization of Nd, Te and U isotope ratios in UO2 using SIMS SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA. EM fayekm@ornl.gov; cpalenik@umich.edu; rodewing@umich.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A378 EP A378 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701144 ER PT J AU Fein, JB Gorman-Lewis, D Soderholm, L Jensen, MP Chiang, MH AF Fein, JB Gorman-Lewis, D Soderholm, L Jensen, MP Chiang, MH TI Surface complexation modeling of U(VI) and Np(V) adsorption onto the bacterial cell wall of Bacillus subtilis SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Civil Engn & Geol Sci, Notre Dame, IN 46556 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM fein@nd.edu RI Chiang, Ming-Hsi/E-2044-2015 OI Chiang, Ming-Hsi/0000-0002-7632-9369 NR 0 TC 0 Z9 0 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A472 EP A472 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701328 ER PT J AU Feineman, MD Ryerson, FJ DePaolo, DJ AF Feineman, MD Ryerson, FJ DePaolo, DJ TI Pressure and temperature controls on slab-derived fluid chemistry SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Okayama Univ, Inst Study Earths Interior, Misasa, Tottori 6820193, Japan. Lawrence Livermore Natl Lab, Dept Earth Sci, Livermore, CA 94551 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A648 EP A648 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702075 ER PT J AU Felmy, AR Liu, C Straatsma, TP AF Felmy, AR Liu, C Straatsma, TP TI The importance of diffusion at the microbe-mineral interface: Electrical double layer effects and the impact on precipitation/dissolution SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. EM ar.felmy@pnl.gov; chongxuan.liu@pnl.gov; tps@pnl.gov RI Liu, Chongxuan/C-5580-2009 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A171 EP A171 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700334 ER PT J AU Fenter, P Zhang, Z Park, C Sturchio, NC Hu, X Higgins, SR AF Fenter, P Zhang, Z Park, C Sturchio, NC Hu, X Higgins, SR TI Probing the reactivity of the dolomite-water interface using high resolution X-ray reflectivity SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Illinois, Chicago, IL USA. Wright State Univ, Dayton, OH 45435 USA. EM fenter@anl.gov; zhang@anl.gov; cpark@anl.gov; sturchio@uic.edu; xiaoming.hu@wright.edu; steven.higgins@wright.edu RI Park, Changyong/A-8544-2008 OI Park, Changyong/0000-0002-3363-5788 NR 2 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A483 EP A483 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701349 ER PT J AU Fortner, JA Finch, RJ Kropf, AJ Cunnane, JC AF Fortner, JA Finch, RJ Kropf, AJ Cunnane, JC TI Crystal chemistry of radionuclides in spent nuclear fuel and its alteration products SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. EM fortner@cmt.anl.gov RI Finch, Robert/D-9553-2013 OI Finch, Robert/0000-0001-9342-5574 NR 3 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A475 EP A475 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701335 ER PT J AU Frazer, BH Xu, HF Waychunas, GA De Stasio, G AF Frazer, BH Xu, HF Waychunas, GA De Stasio, G TI Quantitative mapping of the ferrous to ferric ratio on a sub-micron scale using synchrotron spectromicroscopy SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID MINERALS C1 Univ Wisconsin, Ctr Synchrotron Radiat, Stoughton, WI 53589 USA. Univ Wisconsin, Dept Geol, Madison, WI USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. EM bhfrazer@wisc.edu; hfxu@geology.wisc.edu; gawaychunas@lbl.gov; pupa@src.wisc.edu RI Gilbert, Pupa/A-6299-2010 OI Gilbert, Pupa/0000-0002-0139-2099 NR 3 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A598 EP A598 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701571 ER PT J AU Fu, Q Lollar, BS Horita, J Lacrampe-Couloume, G Seyfried, W AF Fu, Q Lollar, BS Horita, J Lacrampe-Couloume, G Seyfried, W TI Hydrogen and carbon isotope compositions of hydrocarbons in hydrothermal carbon reduction processes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA. Univ Toronto, Stable Isotope Lab, Toronto, ON M5S 3B1, Canada. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM fuxx0033@umn.edu NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A558 EP A558 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701495 ER PT J AU Fujita, Y Petzke, LM Taylor, MR Taylor, JL Tyler, TL Smith, RW AF Fujita, Y Petzke, LM Taylor, MR Taylor, JL Tyler, TL Smith, RW TI Characterizing microbial ureolytic activity in groundwater for the potential to facilitate calcite precipitation for remediation of strontium-90 SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Idaho State Univ, Pocatello, ID 83209 USA. Univ Idaho, Idaho Falls, ID 83402 USA. EM fujiy@inel.gov; petzlm@inel.gov; taylmatt@isu.edu; tayljl@if.uidaho.edu; tyletina@isu.edu; smithbob@uidaho.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A230 EP A230 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700446 ER PT J AU Geesey, GG Gonzalez-Gil, G Amonette, JE Romine, MF Gorby, YA AF Geesey, GG Gonzalez-Gil, G Amonette, JE Romine, MF Gorby, YA TI Modification of hematite surfaces during colonization by a dissimilatory Fe(III) reducing bacterium under controlled hydrodynamic conditions SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Montana State Univ, Dept Microbiol, Bozeman, MT 59717 USA. Swiss Fed Inst Technol, ETH Zurich, Inst Terr Ecol Soil Biol, CH-8952 Schlieren, Switzerland. Pacific NW Natl Lab, Richland, WA USA. EM gill_g@erc.montana.edu; gonzalez-gil@ito.unmw.ethz.ch; jim.amonette@pnl.gov; margie.romine@pnl.gov; yuri.gorby@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A459 EP A459 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701302 ER PT J AU Ginder-Vogel, M Wu, WM Gu, BH Carley, J Nyman, J Criddle, C Jardine, P Fendorf, S AF Ginder-Vogel, M Wu, WM Gu, BH Carley, J Nyman, J Criddle, C Jardine, P Fendorf, S TI In-situ biological reduction of uranium within fractured saprolite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM gindervm@stanford.edu RI Gu, Baohua/B-9511-2012 OI Gu, Baohua/0000-0002-7299-2956 NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A464 EP A464 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701312 ER PT J AU Gorby, Y Biju, V Pan, D McLean, J Saffarini, D Fredrickson, J Lu, HP AF Gorby, Y Biju, V Pan, D McLean, J Saffarini, D Fredrickson, J Lu, HP TI Display and retraction of outer membrane cytochromes by Shewanella oneidensis in response to electron acceptor availability SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. Univ Wisconsin, Madison, WI USA. EM yuri.gorby@pnl.gov; biju_vpillai@yahoo.com; duohai.pan@pnl.gov; jeff.mclean@pnl.gov; daads@umw.edu; jim.fredrickson@pnl.gov; peter.lu@pnl.gov RI Vasudevan, Biju/K-6879-2015 NR 0 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A671 EP A671 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702119 ER PT J AU Gorman-Lewis, D Jensen, MP Fein, JB AF Gorman-Lewis, D Jensen, MP Fein, JB TI Measuring the enthaply of proton, lead, and cadmium adsorption onto Bacillus subtilis SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM dgormanl@nd.edu; mjensen@ant.gov; fein@nd.edu NR 1 TC 1 Z9 1 U1 2 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A669 EP A669 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702115 ER PT J AU Gosse, JC Baker, S Pazzaglia, F Brandon, M Karlstrom, K Pederson, J Finkel, R AF Gosse, JC Baker, S Pazzaglia, F Brandon, M Karlstrom, K Pederson, J Finkel, R TI Five ways to examine what isn't there with cosmogenic isotopes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Dalhousie Univ, Dept Earth Sci, Halifax, NS, Canada. Lehigh Univ, Dept Earth & Env Sci, Bethlehem, PA 18015 USA. Yale Univ, Dept Geol, New Haven, CT USA. Univ New Mexico, Dept Earth & Planet Sci, Albuquerque, NM 87131 USA. Utah State Univ, Dept Geol, Logan, UT 84322 USA. CAMS, Lawrence Livermore Natl Lab, Lawrence, CA USA. EM john.gosse@dal.ca RI Gosse, John/B-4934-2012 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A163 EP A163 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700318 ER PT J AU Gu, BH AF Gu, BH TI Role of humic substances in metal compexation, reduction and reoxidation processes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RI Gu, Baohua/B-9511-2012 OI Gu, Baohua/0000-0002-7299-2956 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A541 EP A541 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701463 ER PT J AU Gustin, MS Engle, M Ericksen, J Xin, M Krabbenhoft, D Lindberg, S Olund, S Rytuba, J AF Gustin, MS Engle, M Ericksen, J Xin, M Krabbenhoft, D Lindberg, S Olund, S Rytuba, J TI New insights into mercury exchange between air and substrate SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Nevada, Dept Nat Resources & Environm Sci, Reno, NV 89557 USA. US Geol Survey, Div Water Resources, Middleton, WI USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. US Geol Survey, Menlo Pk, CA 94025 USA. NR 0 TC 3 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A700 EP A700 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702176 ER PT J AU Harrington, LF Myneni, SCB AF Harrington, LF Myneni, SCB TI The structural chemistry of hydroxyl moieties in ferric polymers SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA. Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA USA. EM lfharrin@princeton.edu; smyneni@princeton.edu NR 2 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A515 EP A515 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701412 ER PT J AU Helean, KB Moore, RC AF Helean, KB Moore, RC TI Sequestration of radionuclides and heavy metals by hydroxyapatite doped with Fe, Cu and Sn SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Sandia Natl Labs, Program Dev & Environm Decis Dept, Albuquerque, NM 87185 USA. NR 2 TC 0 Z9 0 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A70 EP A70 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700136 ER PT J AU Hinman, N Burton, S Cho, H Tenesch, A Kotler, JM Strumness, L AF Hinman, N Burton, S Cho, H Tenesch, A Kotler, JM Strumness, L TI Silicon-aluminum MAS-NMR TRAPDOR of natural silica minerals SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Montana, Dept Geol, Missoula, MT 59812 USA. Pacific NW Natl Lab, Richland, WA USA. EM nhinman@selway.umt.edu; sd.burton@pnl.gov; hm.cho@pnl.gov; julia.kotler@umontana.edu; laura.strumness@umontana.edu NR 0 TC 0 Z9 0 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A814 EP A814 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702396 ER PT J AU Hooper, P Camp, V Reidel, S Ross, M AF Hooper, P Camp, V Reidel, S Ross, M TI The Columbia River basalts SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Washington State Univ, Dept Geol, Pullman, WA 99164 USA. Open Univ, Dept Earth Sci, Milton Keynes MK7 6AA, Bucks, England. San Diego State Univ, Dept Geol Sci, San Diego, CA 92981 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Battelle Mem Inst, Richland, WA 99352 USA. Northeastern Univ, Dept Geol, Boston, MA 02115 USA. NR 0 TC 1 Z9 1 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A138 EP A138 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700269 ER PT J AU Houk, RS AF Houk, RS TI New directions in ICP-MS SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Iowa State Univ, Dept Chem, Ames Lab, US DOE, Ames, IA 50011 USA. EM rshouk@iastate.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A53 EP A53 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700103 ER PT J AU Hu, Q Ewing, RP Steefel, CI Tomutsa, L Hudson, GB AF Hu, Q Ewing, RP Steefel, CI Tomutsa, L Hudson, GB TI Multiple approaches to studying diffusion processes in geological media SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. Iowa State Univ, Dept Agron, Ames, IA 50011 USA. Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM hu7@llnl.gov; ewing@iastate.edu; cisteefel@lbl.gov; ltomutsa@lbl.gov; hudson5@llnl.gov RI Hu, Qinhong/C-3096-2009; Steefel, Carl/B-7758-2010; Ewing, Robert/J-8968-2013 OI Hu, Qinhong/0000-0002-4782-319X; NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A171 EP A171 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700333 ER PT J AU Huai, B Terry, J Deng, BL Thornton, E AF Huai, B Terry, J Deng, BL Thornton, E TI Rates of uranium(VI) reduction by hydrogen sulfide in aqueous media: Effects of carbonate and pH SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Missouri, Dept Civil & Environm Engn, Columbia, MO 65211 USA. IIT, Dept Biol Chem & Phys Sci, Chicago, IL 60616 USA. PNNL, Field Hydrol Div, Richland, WA 99352 USA. EM dengb@missouri.edu NR 1 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A470 EP A470 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701324 ER PT J AU Hull, LC Pepper, SE Clark, SB AF Hull, LC Pepper, SE Clark, SB TI Adsorption of Lanthanum to goethite in the presence of gluconic acid SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Washington State Univ, Pullman, WA 99164 USA. EM hulllc@inel.gov; spepper@wsu.edu; s_clark@wsu.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A422 EP A422 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701231 ER PT J AU Hutcheon, ID Weber, PK Fallon, SJ Krot, AN AF Hutcheon, ID Weber, PK Fallon, SJ Krot, AN TI NanoSIMS Mg isotope analyses of refractory inclusions in metal-rich CB chondrites SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Hawaii Manoa, Sch Ocean & Earth Sci & Technol, Honolulu, HI 96822 USA. EM hutcheon1@llnl.gov NR 2 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A524 EP A524 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701430 ER PT J AU Icenhower, J McGrail, BP Luttge, A AF Icenhower, J McGrail, BP Luttge, A TI The role of Si-O bonds in dissolution of silicate glasses: Inferences for rate-limiting step SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Rice Univ, Dept Earth Sci, Houston, TX 77251 USA. EM jonathan.icenhower@pnl.gov; pete.mcgrail@pnl.gov; aluttge@rice.edu RI Icenhower, Jonathan/E-8523-2011; Luttge, Andreas/A-2560-2011 OI Luttge, Andreas/0000-0002-5878-4026 NR 0 TC 1 Z9 1 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A778 EP A778 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702328 ER PT J AU Icopini, GA Lack, JG Hersman, LE Neu, MP AF Icopini, GA Lack, JG Hersman, LE Neu, MP TI The influence of metal reducing bacteria on plutonium speciation SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM USA. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM USA. EM gicopini@lanl.gov; lack@lanl.gov; hersman@lanl.gov; mneu@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A472 EP A472 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701329 ER PT J AU Ilton, ES Heald, SM AF Ilton, ES Heald, SM TI Reduction of uranyl by trace to minor structural Fe(II) in phyllosilicates SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, MSIN, Richland, WA 99352 USA. EM Eugene.Ilton@pnl.gov; Steve.Heald@pnl.gov NR 1 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A471 EP A471 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701327 ER PT J AU Jeon, BH Zachara, JM Liu, CX Kukkadapu, R Dohnalkova, A AF Jeon, BH Zachara, JM Liu, CX Kukkadapu, R Dohnalkova, A TI Abiotic Tc(VII) reduction by Fe(II) SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RI Liu, Chongxuan/C-5580-2009 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A368 EP A368 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701125 ER PT J AU Kang, QJ Lichtner, PC AF Kang, QJ Lichtner, PC TI Lattice Boltzmann pore-scale model for coupled multi-component flow, diffusion, and reaction SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A172 EP A172 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700335 ER PT J AU Kelly, SD Brooks, SC Fredrickson, JK Rasbury, ET Spotl, C Sturchio, NC Kemner, KM AF Kelly, SD Brooks, SC Fredrickson, JK Rasbury, ET Spotl, C Sturchio, NC Kemner, KM TI Uranyl-calcium coordination in calcium carbonate systems SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Pacific NW Natl Lab, Richland, WA 99352 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Univ Innsbruck, A-6020 Innsbruck, Austria. Univ Illinois, Chicago, IL USA. EM skelly@anl.gov; brookssc@ornl.gov; Jim.Fredrickson@pnl.gov; erasbury@notes.cc.sunysb.edu; christoph.spoetl@uibk.ac.at; sturchio@uic.edu; kemner@anl.gov RI Brooks, Scott/B-9439-2012 OI Brooks, Scott/0000-0002-8437-9788 NR 0 TC 0 Z9 0 U1 2 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A473 EP A473 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701330 ER PT J AU Kemner, KM Kelly, SD Boyanov, MI Lai, B Glasauer, S Langley, S Kulpa, CF Beveridge, TJ Nealson, KH AF Kemner, KM Kelly, SD Boyanov, MI Lai, B Glasauer, S Langley, S Kulpa, CF Beveridge, TJ Nealson, KH TI X-ray microprobe investigations of mineral-metal-microbe interfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Guelph, Guelph, ON N1G 2W1, Canada. Univ Ottawa, Ottawa, ON K1N 6N5, Canada. Univ Notre Dame, Notre Dame, IN 46556 USA. Univ So Calif, Los Angeles, CA 90089 USA. EM kemner@anl.gov; skelly@anl.gov; mboyanov@anl.gov; blai@aps.anl.gov; sglasauer@uoguelph.ca; Lang053@uottawa.ca; Kulpa@nd.edu; tjb@uoguelph.ca; knealson@usc.edu NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A34 EP A34 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700067 ER PT J AU Kerisit, S Parker, SC AF Kerisit, S Parker, SC TI Free energy of adsorption of molecules and ions at the calcite-water interface SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England. EM sebastien.kerisit@pnl.gov; s.c.parker@bath.ac.uk RI Parker, Steve/C-8180-2011 OI Parker, Steve/0000-0003-3804-0975 NR 1 TC 1 Z9 1 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A481 EP A481 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701346 ER PT J AU Kim, CS Waychunas, GA AF Kim, CS Waychunas, GA TI Reactivity of iron oxyhydroxide nanoparticles with heavy metals as a function of particle size SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Chapman Univ, Dept Phys Sci, Orange, CA USA. Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA USA. EM cskim@chapman.edu; gawaychunas@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A514 EP A514 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701409 ER PT J AU Korshin, GV Chang, HS Wang, ZM Zachara, JM AF Korshin, GV Chang, HS Wang, ZM Zachara, JM TI Speciation of uranyl adsorbed on gibbsite: A time-resolved laser-induced fluorescence spectroscopic study SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Washington, Seattle, WA 98195 USA. Pacific NW Natl Lab, Richland, WA USA. EM korshin@u.washington.edu; john.zachara@pnl.gov RI Wang, Zheming/E-8244-2010 OI Wang, Zheming/0000-0002-1986-4357 NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A619 EP A619 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702017 ER PT J AU Kotula, PG Keenan, MR Goldstein, JI Carpenter, P AF Kotula, PG Keenan, MR Goldstein, JI Carpenter, P TI STEM and SEM X-Ray spectral imaging with multivariate statistical analysis: Application to the microanalysis of meteorites SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Massachusetts, Amherst, MA 01003 USA. NASA, George C Marshall Space Flight Ctr, BAE Syst, SD46, Huntsville, AL 35812 USA. EM pgkotul@sandia.gov; mrkeena@sandia.gov; jig0@ecs.umass.edu; Paul.Carpenter@msfc.nasa.gov NR 5 TC 3 Z9 3 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A588 EP A588 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701551 ER PT J AU Krupka, KM Parkhurst, MA Arey, B Jenson, ED AF Krupka, KM Parkhurst, MA Arey, B Jenson, ED TI Uranium oxides generated from armored vehicles perforated by ammunition composed of depleted uranium metal SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM ken.krupka@pnl.gov; maryann.parkhurst@pnl.gov NR 0 TC 0 Z9 0 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A266 EP A266 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700516 ER PT J AU Labotka, TC Deangelis, MT Cole, DR AF Labotka, TC Deangelis, MT Cole, DR TI Breakdown of dolomite in H2O-rich fluid: An experimental study SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A406 EP A406 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701199 ER PT J AU Lawrence, JR Dynes, JJ Hitchcock, AP West, MM Leppard, GG Swerhone, GDW Tyliszczak, T Araki, T AF Lawrence, JR Dynes, JJ Hitchcock, AP West, MM Leppard, GG Swerhone, GDW Tyliszczak, T Araki, T TI Mapping of metal species in biofilms using scanning transmission X-ray microscopy SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 NWRI, Saskatoon, SK, Canada. McMaster Univ, Hamilton, ON L8S 4L8, Canada. NWRI, Burlington, ON, Canada. Lawrence Berkeley Lab, Berkeley, CA USA. EM john.lawrence@ec.gc.ca; james.dynes@ec.gc.ca; aph@mcmaster.ca; westm@mcmaster.ca; gary.leppard@ec.gc.ca; george.swerhone@ec.gc.ca; tolek@lbl.gov; taraki@lbl.gov RI Lawrence, John/D-5758-2011 OI Lawrence, John/0000-0001-5872-1212 NR 0 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A600 EP A600 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701575 ER PT J AU Lee, SS Nagy, KL Fenter, P Sturchio, NC AF Lee, SS Nagy, KL Fenter, P Sturchio, NC TI In situ x-ray reflectivity study of the mica-fulvic acid interface SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Illinois, Dept Earth & Ennvironm Sci, Chicago, IL 60607 USA. Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. EM slee28@uic.edu; klnagy@uic.edu; fenter@anl.gov; sturchio@uic.edu RI Lee, Sang Soo/B-9046-2012 NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A491 EP A491 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701365 ER PT J AU Li, YL Zhang, CL Vali, H Cole, DR Phelps, TJ AF Li, YL Zhang, CL Vali, H Cole, DR Phelps, TJ TI Mossbauer spectroscopy of extracellular tabular magnetite formed during microbial iron reduction SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Savannah River Ecol Lab, Aiken, SC 29803 USA. Univ Georgia, Aiken, SC 29803 USA. McGill Univ, Dept Anat Cell Biol, Montreal, PQ H3A 2B2, Canada. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM Li@SREL.edu; zhang@srel.edu; vali@eps.mcgill.ca; coledr@ornl.gov; phelpstj@ornl.gov RI Vali, Hojatollah/F-3511-2012 OI Vali, Hojatollah/0000-0003-3464-9943 NR 1 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A461 EP A461 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701307 ER PT J AU Lindegren, M Loring, JS Redden, G Persson, P AF Lindegren, M Loring, JS Redden, G Persson, P TI Citrate adsorption at the water-goethite interface: A spectroscopic evaluation of surface complexes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Umea Univ, Dept Chem, S-90187 Umea, Sweden. Idaho Natl Engn & Environm Lab, Idaho Falls, ID USA. EM malin.lindegren@chem.umu.se NR 2 TC 1 Z9 1 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A369 EP A369 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701127 ER PT J AU Liu, C Majors, PD Zachara, JM McKinley, JP AF Liu, C Majors, PD Zachara, JM McKinley, JP TI Microscopic reactive diffusion of U(VI) in subsurface sediments: Characterization and modeling SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RI Liu, Chongxuan/C-5580-2009 NR 1 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A170 EP A170 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700332 ER PT J AU Liu, QY Xu, HW Navrotsky, A AF Liu, QY Xu, HW Navrotsky, A TI Synthesis and thermochemistry of nitrate cancrinite and nitrate sodalite SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Davis, Thermochem Facil, Davis, CA 95616 USA. Univ Calif Davis, NEAT ORU, Davis, CA 95616 USA. Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA. EM hxu@lanl.gov; anavrotsky@ucdavis.edu NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A428 EP A428 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701243 ER PT J AU Lollar, BS Telling, J Lacrampe-Couloume, G Fu, Q Seyfried, W Horita, J McCollom, TM AF Lollar, BS Telling, J Lacrampe-Couloume, G Fu, Q Seyfried, W Horita, J McCollom, TM TI Carbon and hydrogen isotope measurements in abiogenic hydrocarbon synthesis SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Toronto, Stable Isotope Lab, Toronto, ON M5S 3B1, Canada. Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN 55455 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Colorado, Ctr Astrobiol, Boulder, CO 80309 USA. Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA. EM bslollar@chem.utoronto.ca RI Telling, Jon/M-7643-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A557 EP A557 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701494 ER PT J AU Lu, ZT AF Lu, ZT TI Kr-81-dating: From dream to practice SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Chicago, Div Phys, Argonne Natl Lab, Dept Phys, Chicago, IL 60637 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. EM lu@anl.gov NR 3 TC 0 Z9 0 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A164 EP A164 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700319 ER PT J AU Machesky, ML Wesolowski, DJ Fenter, PA Zhang, Z Kubicki, JD AF Machesky, ML Wesolowski, DJ Fenter, PA Zhang, Z Kubicki, JD TI Modeling Zn2+ adsorption at the rutile-water interface to hydrothermal conditions SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Penn State Univ, University Pk, PA 16802 USA. EM machesky@sws.uiuc.edu; dqw@oml.gov; Fenter@anl.gov; ZhanZhang@anl.gov; kubicki@geosc.psu.edu RI Kubicki, James/I-1843-2012 OI Kubicki, James/0000-0002-9277-9044 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A46 EP A46 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700091 ER PT J AU Manceau, A Schlegel, M Rihs, S Marcus, MA AF Manceau, A Schlegel, M Rihs, S Marcus, MA TI Natural speciation of Mn, Ni and Zn at the micrometer scale in a clayey paddy soil using X-ray fluorescence, absorption, and diffraction SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Grenoble 1, LGIT, F-38000 Grenoble, France. CEA Saclay, DEN, DPC, SCP, F-91191 Gif Sur Yvette, France. Univ Strasbourg 1, Lab Geochem, F-67084 Strasbourg, France. LBNL, Adv Light Source, Berkeley, CA 94720 USA. EM manceau@ujf-grenoble.fr; schlegel@azurite.cea.fr; rihs@illite.u-strasbg.fr; MAMarcus@lbl.gov NR 0 TC 4 Z9 4 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A612 EP A612 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702004 ER PT J AU Matmon, A Bierman, PR Larsen, J Southworth, S Pavich, M Finkel, R Caffee, M AF Matmon, A Bierman, PR Larsen, J Southworth, S Pavich, M Finkel, R Caffee, M TI Grain size dependency of Be-10 concentrations in alluvial sediments in the Great Smoky Mountains SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 US Geol Survey, Menlo Pk, CA 94025 USA. Univ Vermont, Dept Geol, Burlington, VT 05405 USA. US Geol Survey, Reston, VA 20192 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 3 Z9 3 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A160 EP A160 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700312 ER PT J AU Mayes, MA Pace, MN Fendorf, SE Jardine, PM Yin, XL AF Mayes, MA Pace, MN Fendorf, SE Jardine, PM Yin, XL TI Uranium hydrogeochemistry of the Hanford caliche layer SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM mayesma@ornl.gov; fendorf@stanford.edu NR 0 TC 0 Z9 0 U1 2 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A424 EP A424 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701234 ER PT J AU Meakin, P Rosso, KM Yanina, S AF Meakin, P Rosso, KM Yanina, S TI Fast kinetic Monte Carlo models for defect controlled dissolution of multiple etch pits SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Lab, Idaho Falls, ID USA. Pacific NW Natl Lab, Richland, WA 99352 USA. EM meakp@inel.gov; Kevin.rosso@pnl.gov; svetlana.yanina@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A488 EP A488 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701360 ER PT J AU Mishra, B Kelly, SD Fein, JB Boyanov, M Kemner, KM Bunker, BA AF Mishra, B Kelly, SD Fein, JB Boyanov, M Kemner, KM Bunker, BA TI Cd adsorption onto Bacillus subtilis bacterial cell walls: Integrating isotherm and EXAFS studies SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Dept Civil Engn & Geol Sci, Notre Dame, IN 46556 USA. EM bmishra@nd.edu NR 0 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A675 EP A675 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702127 ER PT J AU Moore, J Lichtner, PC White, AF Brantley, SL AF Moore, J Lichtner, PC White, AF Brantley, SL TI Reactive transport modeling of reaction fronts SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Penn State Univ, Dept Geosci, University Pk, PA 16802 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. US Geol Survey, Menlo Pk, CA 94025 USA. EM joelmoore@psu.edu; lichtner@lanl.gov; afwhite@usgs.gov; brantley@essc.psu.edu RI Moore, Joel/G-7626-2011 NR 0 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A688 EP A688 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702153 ER PT J AU Myneni, SCB AF Myneni, SCB TI Studying ligands, metals and their complexes in aqueous systems using soft x-ray spectroscopy SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM smyneni@princeton.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A597 EP A597 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701568 ER PT J AU Navarre, AK Steefel, CI Brantley, SL AF Navarre, AK Steefel, CI Brantley, SL TI Conversion of rock to saprolite: A study of weathering rinds SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Penn State Univ, Dept Geosci, University Pk, PA 16801 USA. Lawrence berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM anavarre@geosc.psu.edu; CISteefei@lbl.gov; brantley@essc.psu.edu RI Steefel, Carl/B-7758-2010 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A170 EP A170 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700331 ER PT J AU Neal, AL Ledbetter, RN Connon, SA Magnuson, TS AF Neal, AL Ledbetter, RN Connon, SA Magnuson, TS TI Photostahle beta-As4S4 produced at low temperature in culture by a novel bacterial isolate from the Alvord Hydrothermal Basin, Oregon SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Georgia, Dept Microbiol, Athens, GA 30602 USA. Univ Georgia, Savannah River Ecol Lab, Athens, GA 30602 USA. Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA. EM neal@srel.edu; magntimo@isu.edu RI Neal, Andrew/C-7596-2011; Connon, Stephanie/K-1959-2012 NR 1 TC 0 Z9 0 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A453 EP A453 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701291 ER PT J AU Nichols, EM Asmerom, Y Roback, RC Jones, CL AF Nichols, EM Asmerom, Y Roback, RC Jones, CL TI Examining water-rock interaction at the Idaho National Engineering and Environmental Laboratory using uranium and strontium isotopes as natural environmental tracers SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA. Los Alamos Natl Lab, Isotope & Nucl Chem Grp, Los Alamos, NM USA. EM enichols@unm.edu; asmerom@unm.edu; roback@lanl.gov; c_jones@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A606 EP A606 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701587 ER PT J AU Otake, T Wesolowsk, DJ Anovitz, LM Hayash, K Ohmoto, H AF Otake, T Wesolowsk, DJ Anovitz, LM Hayash, K Ohmoto, H TI Magnetite transformation to hematite under high H-2 pressure at 150 degrees C SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Penn State Univ, Dept Geosci, University Pk, PA 16802 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Univ Tsukuba, Inst Geosci, Tsukuba, Ibaraki 3058577, Japan. EM totake@geosc.psu.edu RI Otake, Tsubasa/D-6137-2012; Anovitz, Lawrence/P-3144-2016 OI Anovitz, Lawrence/0000-0002-2609-8750 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A425 EP A425 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701236 ER PT J AU Palmer, DA Anovitz, LM Cole, DR Fayek, M Gruszkiewicz, MS Riciputi, LR Wesolowski, DJ Wilson, L AF Palmer, DA Anovitz, LM Cole, DR Fayek, M Gruszkiewicz, MS Riciputi, LR Wesolowski, DJ Wilson, L TI Experimental approaches to predict the behavior of liquid films SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM palmerda@ornl.gov RI Gruszkiewicz, Miroslaw/L-2389-2016; Anovitz, Lawrence/P-3144-2016 OI Gruszkiewicz, Miroslaw/0000-0002-6551-6724; Anovitz, Lawrence/0000-0002-2609-8750 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A413 EP A413 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701212 ER PT J AU Panfili, F Manceau, A Sarret, G Laboudigue, A Bert, V Marcus, MA AF Panfili, F Manceau, A Sarret, G Laboudigue, A Bert, V Marcus, MA TI Changes in Zn speciation in the rhizosphere of graminaceous plants induced by phytostabilization of a contaminated sediment SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Grenoble 1, LGIT, Environm Geochem Grp, F-38041 Grenoble, France. CNRS, F-38041 Grenoble, France. Ctr Natl Rech Sites & Sols Pollues, F-59505 Douai, France. ALS, Berkeley Lab, Berkeley, CA 94720 USA. EM mamarcus@lbl.gov RI Laboudigue, Agnes/B-9025-2013 NR 0 TC 2 Z9 2 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A626 EP A626 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702031 ER PT J AU Park, C Fenter, PA Sturchio, NC Regalbuto, JR AF Park, C Fenter, PA Sturchio, NC Regalbuto, JR TI Resonant anomalous x-ray reflectivity: A new structural and spectroscopic probe of metal adsorption at mineral-water interfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA. Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA. EM cypark@anl.gov; fenter@anl.gov; sturchio@uic.edu; jrr@uic.edu RI Park, Changyong/A-8544-2008 OI Park, Changyong/0000-0002-3363-5788 NR 1 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A42 EP A42 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700083 ER PT J AU Parker, SC Cooke, DJ Marmier, A Kerisit, S AF Parker, SC Cooke, DJ Marmier, A Kerisit, S TI Non-stoichiometric mineral surfaces: Ab initio phase diagrams SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England. Pacific NW Natl Lab, Richland, WA 99352 USA. EM s.c.parker@bath.ac.uk; sebastien.kerisit@pnl.gov RI Parker, Steve/C-8180-2011 OI Parker, Steve/0000-0003-3804-0975 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A484 EP A484 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701351 ER PT J AU Pecher, K Baer, DR McCready, D Engelhard, M Lopatin, S Browning, N AF Pecher, K Baer, DR McCready, D Engelhard, M Lopatin, S Browning, N TI Spectroscopic characterization of nano-magnetite: Facts and mystery about an illusive mineral phase SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. EM klaus.pecher@pnl.gov RI Engelhard, Mark/F-1317-2010; Baer, Donald/J-6191-2013 OI Baer, Donald/0000-0003-0875-5961 NR 2 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A600 EP A600 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701574 ER PT J AU Phillips, DH Watson, DB Gu, B Roh, Y Choi, SK AF Phillips, DH Watson, DB Gu, B Roh, Y Choi, SK TI Mineral precipitation and corrosion in a long-term zero-valent iron reactive barrier SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Queens Univ Belfast, Civil Engn Dept & Environm Agcy, Belfast BT9 5AG, Antrim, North Ireland. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Univ Arizona, Dept Soil Water & Environm Sci, Tucson, AZ USA. EM dhphillips2003@yahoo.com RI Gu, Baohua/B-9511-2012 OI Gu, Baohua/0000-0002-7299-2956 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A266 EP A266 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700517 ER PT J AU Pierce, EM Reed, LR Shaw, WJ Icenhower, JP AF Pierce, EM Reed, LR Shaw, WJ Icenhower, JP TI Effect of Al/B ratio on the dissolution of nepheline glass, Na-3(Al, B)(1-4)Si4O16 SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. Washington State Univ, Richland, WA USA. EM eric.pierce@pnl.gov; lunde.reed@pnl.gov; wendy.shaw@pnl.gov; jonathan.icenhower@pnl.gov RI Icenhower, Jonathan/E-8523-2011; Pierce, Eric/G-1615-2011 OI Pierce, Eric/0000-0002-4951-1931 NR 0 TC 1 Z9 1 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A781 EP A781 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702333 ER PT J AU Plummer, MA Hull, LC Cooper, DC Fox, DT Seitz, R AF Plummer, MA Hull, LC Cooper, DC Fox, DT Seitz, R TI Oxygen consumption and carbon dioxide production in a large physical model of the vadose zone SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. EM plumma@inel.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A232 EP A232 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700450 ER PT J AU Plymale, AE Fredrickson, JK Zachara, JM Kennedy, DW Kukkadapu, RK Dohnalkova, AC AF Plymale, AE Fredrickson, JK Zachara, JM Kennedy, DW Kukkadapu, RK Dohnalkova, AC TI Biogeochemical redox transformations of technetium-99 in Hanford and Oak Ridge sediments SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM plymale@pnl.gov NR 0 TC 1 Z9 1 U1 2 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A801 EP A801 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702371 ER PT J AU Poitrasson, F Freydier, R Mao, X Mao, SS Russo, RE AF Poitrasson, F Freydier, R Mao, X Mao, SS Russo, RE TI Femtosecond laser ablation ICP-MS analysis of trace elements in solids SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID ID PLASMA-MASS SPECTROMETRY; NANOSECOND C1 LMTG, CNRS, F-31400 Toulouse, France. LBNL, Berkeley, CA 94720 USA. EM Franck.Poitrasson@lmtg.obs-mip.fr NR 4 TC 2 Z9 2 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A54 EP A54 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700105 ER PT J AU Post, JE Heaney, PJ Hanson, J AF Post, JE Heaney, PJ Hanson, J TI Temperature-resolved synchrotron X-ray diffraction study of dehydration of birnessite-like phases SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Smithsonian Inst, Dept Mineral Sci, Washington, DC 20560 USA. Penn State Univ, Dept Geosci, University Pk, PA 16802 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11793 USA. EM post.jeffrey@nmnh.si.edu NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A627 EP A627 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702033 ER PT J AU Qafoku, NP Zachara, JM Liu, C AF Qafoku, NP Zachara, JM Liu, C TI Uranium(VI) desorption from long-term contaminated sediments SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. EM nik.qafoku@pnl.gov; john.zachara@pnl.gov; chongxuan.liu@pnl.gov RI Liu, Chongxuan/C-5580-2009 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A470 EP A470 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701325 ER PT J AU Ray, AE Connon, SA Neal, AL Sivaswamy, V Peyton, BM Cummms, DE Fujita, Y Magnuson, TS AF Ray, AE Connon, SA Neal, AL Sivaswamy, V Peyton, BM Cummms, DE Fujita, Y Magnuson, TS TI Microbial transformation of AQDS, Fe(III), Cr(VI), and U(VI) by a novel Clostridiales, strain UFO1 SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA. Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. Savannah River Ecol Lab, Aiken, SC 29803 USA. Washington State Univ, Dept Chem Engn, Pullman, WA 99164 USA. Point Loma Nazarene Univ, San Diego, CA 92106 USA. EM rayalli@isu.edu RI Neal, Andrew/C-7596-2011; Connon, Stephanie/K-1959-2012; Peyton, Brent/G-5247-2015; Ray, Allison/B-9685-2017 OI Peyton, Brent/0000-0003-0033-0651; Ray, Allison/0000-0002-5191-1029 NR 0 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A454 EP A454 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701294 ER PT J AU Redden, GD Fujita, Y Delwiche, ME White, TA Roney, T Versteeg, RJ Fox, DT Palmer, CD AF Redden, GD Fujita, Y Delwiche, ME White, TA Roney, T Versteeg, RJ Fox, DT Palmer, CD TI Mixing solutions, precipitation and changing permeability in porous media SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Idaho Natl Lab, Idaho Falls, ID USA. EM reddgd@inel.gov RI Fujita, Yoshiko/S-2007-2016 OI Fujita, Yoshiko/0000-0002-4472-4102 NR 0 TC 0 Z9 0 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A180 EP A180 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700352 ER PT J AU Reed, DT Rittmann, BE Songkasiri, W AF Reed, DT Rittmann, BE Songkasiri, W TI Biosorption of neptunium (IV) and neptunium (V) on soil bacteria SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Los Alamos Natl Lab, EES12, Carlsbad, NM 88220 USA. Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA. Arizona State Univ, Ctr Environm Biotechnol, Tempe, AZ 85282 USA. King Mongkuts Univ Technol, Biochem Engn & Dev Unit, Bangkok 10150, Thailand. EM dreed@cemrc.org; Rittmann@asu.edu RI Songkasiri , Warinthorn/H-9274-2013 NR 0 TC 0 Z9 0 U1 2 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A677 EP A677 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702131 ER PT J AU Reidel, S AF Reidel, S TI Heterogeneity in Columbia River Basalt Group dikes and the flows they feed: Implications for significance and time scale of magma processes SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA USA. EM sp.reidel@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A139 EP A139 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700270 ER PT J AU Rosso, KM Dupuis, M AF Rosso, KM Dupuis, M TI On charge transport in iron oxides SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. EM kevin.rosso@pnl.gov; michel.dupuis@pnl.gov NR 0 TC 1 Z9 1 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A778 EP A778 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702327 ER PT J AU Rosso, KM Wang, Z Ainsworth, CC Fredrickson, JK AF Rosso, KM Wang, Z Ainsworth, CC Fredrickson, JK TI Rates of uranium electron transfer: A theoretical perspective SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Pacific NW Natl Lab, Richland, WA 99352 USA. EM kevin.rosso@pnl.gov; zheming.wang@pnl.gov; calvin.ainsworth@pnl.gov; jim.fredrickson@pnl.gov RI Wang, Zheming/E-8244-2010 OI Wang, Zheming/0000-0002-1986-4357 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A360 EP A360 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701108 ER PT J AU Rustad, JR Rosso, KM Felmy, AR AF Rustad, JR Rosso, KM Felmy, AR TI Electron transfer reactions in solution and at interfaces SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Univ Calif Davis, Dept Geol, Davis, CA 95616 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. EM jrrustad@ucdavis.edu; kevin.rosso@pnl.gov; ar_felmy@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A505 EP A505 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701392 ER PT J AU Sani, RK Peyton, BM Dohnalkova, A Amonette, JE AF Sani, RK Peyton, BM Dohnalkova, A Amonette, JE TI Reoxidation of biologically reduced uranium with Fe(III)-(hydr)oxides under sulfate-reducing conditions SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Washington State Univ, Ctr Multiphase Environm Res, Pullman, WA 99164 USA. Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. EM rajesh@mail.wsu.edu; bmp@wsu.edu; Alice.Dohnalkova@pnl.gov; jim.amonette@pnl.gov RI Peyton, Brent/G-5247-2015 OI Peyton, Brent/0000-0003-0033-0651 NR 0 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A471 EP A471 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399701326 ER PT J AU Schuster, PF Krabbenhoft, DP Naftz, DL Cecil, LD Olson, ML Dewild, JF Susong, DD Green, JR AF Schuster, PF Krabbenhoft, DP Naftz, DL Cecil, LD Olson, ML Dewild, JF Susong, DD Green, JR TI A 270-year ice core record of atmospheric mercury deposition to western North America: An indicator of a partial success of the United States Clean Air Act of 1970 SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 US Geol Survey, Middleton, WI 53562 USA. US Geol Survey, Salt Lake City, UT 84119 USA. US Geol Survey, Idaho Falls, ID 83402 USA. Garden City Community Coll, Garden City, KS USA. US Geol Survey, Boulder, CO 80303 USA. EM pschuste@usgs.gov; dpkrabbe@usgs.gov; dlnaftz@usgs.gov; ldcecil@usgs.gov; jaromy.green@gcccks.edu NR 0 TC 0 Z9 0 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A208 EP A208 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399700404 ER PT J AU Schwehr, KA Santschi, PH Moran, JE Elmore, D AF Schwehr, KA Santschi, PH Moran, JE Elmore, D TI Near-conservative behavior of (129)Iodine in the Orange County Aquifer System, California SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Meeting Abstract CT 15th Annual V M Goldschmidt Conference CY MAY, 2005 CL Moscow, ID C1 Texas A&M Univ, College Stn, TX 77843 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Purdue Univ, PRIME Lab, W Lafayette, IN 47907 USA. EM schwehrk@tamug.edu; santschi@tamug.edu; moran10@llnl.gov; elmore@purdue.edu RI Santschi, Peter/D-5712-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD MAY PY 2005 VL 69 IS 10 SU S BP A721 EP A721 PG 1 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 930EX UT WOS:000229399702218 ER EF