FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Baltrusaitis, RM Gittings, ML Weaver, RP Benjamin, RF Budzinski, JM AF Baltrusaitis, RM Gittings, ML Weaver, RP Benjamin, RF Budzinski, JM TI Simulation of shock-generated instabilities SO PHYSICS OF FLUIDS LA English DT Article ID THIN FLUID LAYER; RICHTMYER-MESHKOV INSTABILITY; STABILITY; PATTERNS; GROWTH AB Direct 2-D numerical simulation of the fluid instability of a shock-accelerated thin gas layer shows flow patterns in agreement with experimental images. The Eulerian-based hydrodynamics code features Adaptive Mesh Refinement that allows the code to follow the vorticity generation and the complex flow resulting from the measured initial perturbations. These experiments and simulations are the first to address in quantitative detail the evolution of the Richtmyer-Meshkov instability in a thin fluid layer, and to show how interfluid mixing and vorticity production depend sensitively on initial perturbations in the layer. (C) 1996 American Institute of Physics. C1 LOS ALAMOS NATL LAB,APPL THEORET & COMPUTAT PHYS DIV,HYDRODYNAM METHODS GRP,LOS ALAMOS,NM 87545. SCI APPLICAT INT CORP,SAN DIEGO,CA 92121. LOS ALAMOS NATL LAB,EXPERIMENTAT DIV,HYDRODYNAM GRP,LOS ALAMOS,NM 87545. RP Baltrusaitis, RM (reprint author), LOS ALAMOS NATL LAB,APPL THEORET & COMPUTAT PHYS DIV,THERMONUCL APPLICAT GRP,LOS ALAMOS,NM 87545, USA. NR 18 TC 75 Z9 80 U1 0 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD SEP PY 1996 VL 8 IS 9 BP 2471 EP 2483 DI 10.1063/1.869032 PG 13 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA VE519 UT WOS:A1996VE51900024 ER PT J AU Chen, SY Martinez, D Mei, RW AF Chen, SY Martinez, D Mei, RW TI On boundary conditions in lattice Boltzmann methods SO PHYSICS OF FLUIDS LA English DT Article ID NAVIER-STOKES EQUATIONS; MODEL; SIMULATIONS; FLOWS AB A lattice Boltzmann boundary condition for simulation of fluid flow using simple extrapolation is proposed. Numerical simulations, including two-dimensional Poiseuille flow, unsteady Couette flow, lid-driven square cavity flow, and flow over a column of cylinders for a range of Reynolds numbers, are carried out, showing that this scheme is of second order accuracy in space discretization. Applications of the method to other boundary conditions, including pressure condition and flux condition are discussed. (C) 1996 American Institute of Physics. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV FLORIDA,DEPT AEROSP ENGN MECH & ENGN SCI,GAINESVILLE,FL 32611. RP Chen, SY (reprint author), IBM CORP,DIV RES,TJ WATSON RES CTR,POB 218,YORKTOWN HTS,NY 10598, USA. RI Chen, Shiyi/A-3234-2010 NR 31 TC 288 Z9 309 U1 10 U2 59 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD SEP PY 1996 VL 8 IS 9 BP 2527 EP 2536 DI 10.1063/1.869035 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA VE519 UT WOS:A1996VE51900028 ER PT J AU Davidson, RC Chao, EH AF Davidson, RC Chao, EH TI L=1 electrostatic instability induced by electron-neutral collisions in a nonneutral electron plasma interacting with background neutral gas SO PHYSICS OF PLASMAS LA English DT Article ID ION RESONANCE INSTABILITY; THERMAL-EQUILIBRIUM; DIPOLE CAPTURE; TRANSPORT; FIELD; ASYMMETRIES; SCATTERING; HELIUM; WAVES; TIME AB This paper investigates theoretically the electrostatic stability properties of a nonneutral electron plasma interacting with background neutral gas through elastic collisions with constant collision frequency nu(en). The model treats the electrons as a strongly magnetized fluid (omega(pe)(2)/omega(ce)(2) much less than 1) immersed in a uniform B-0e over cap(z), and assumes small-amplitude perturbations with azimuthal mode number l = 1 and negligible axial variation (partial derivative/partial derivative z = 0). The analysis also assumes weak electron collisions with nu(en)/omega(ce) = epsilon much less than 1, and that the process of heat conduction is sufficiently fast that the electrons have relaxed through electron-electron collisions to a quasiequilibrium state with scalar pressure P (r, theta, t) = (r, theta, t)T, and isothermal temperature T. Assuming that perturbed quantities vary with time according to exp(-iwt), the detailed stability analysis carried out to first order in nu(en)/omega(ce) much less than 1 shows that the real oscillation frequency and growth rate for the l = 1 dioctoron mode are given, respectively, by the simple expressions Re omega=omega(0) and Im omega=(nu(en)/omega(ce))omega(0). Here, omega(0) = Nec/r(w)(2)B(0), where r(w) is the perfectly conducting wall radius, and N = integral d(2)x n is the number of electrons per unit axial length. This analysis suggests that a measurement of the oscillation frequency and growth rate for the l = 1 diocotron mode can be used to infer nu(en), and thereby serve as a sensor for the background neutral pressure. (C) 1996 American Institute of Physics. RP Davidson, RC (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 29 TC 9 Z9 9 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3279 EP 3287 DI 10.1063/1.871610 PG 9 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700007 ER PT J AU Knoll, DA Krasheninnikov, SI McHugh, PR Sigmar, DJ AF Knoll, DA Krasheninnikov, SI McHugh, PR Sigmar, DJ TI Characterization of a partially-ionized, detached, divertor plasma SO PHYSICS OF PLASMAS LA English DT Article ID TRANSPORT; SIMULATION; EQUATIONS AB A combined edge plasma/Navier-Stokes neutral transport model is used to characterize divertor plasma detachment, in the collisional limit for neutrals, on a simplified two-dimensional slab geometry with Alcaeor-C-MOD-like plasma conditions [II. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)]. The neutral model contains three momentum equations which are coupled to the plasma through ionization, recombination, and ion-neutral elastic collisions. The neutral transport coefficients are evaluated including both ion-neutral and neutral-neutral collisions. Detachment is brought about via impurity radiation using a fixed fraction impurity model. The transport model is shown to reproduce all salient features of experimentally observed detachment, such as large drops in ion saturation current and plasma heat Aux at the divertor plate. The solutions are also shown to be sensitive to volume recombination. A region of relatively high toroidal neutral Mach number is observed upon detachment. Due to the high neutral densities, 75% of the Lyman a radiation is assumed trapped in the problem. A total edge radiative loss (neutrals and impurities) of approximately 75% of the power crossing the separatrix is needed to observe strong detachment on Alcator-C-MOD-like plasmas using the described model. (C) 1996 American Institute of Physics. C1 MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139. RP Knoll, DA (reprint author), IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 27 TC 11 Z9 11 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3358 EP 3368 DI 10.1063/1.871611 PG 11 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700018 ER PT J AU Gorelenkov, NN Budny, RV Chang, Z Gorelenkova, MV Zakharov, LE AF Gorelenkov, NN Budny, RV Chang, Z Gorelenkova, MV Zakharov, LE TI A threshold for excitation of neoclassical tearing modes SO PHYSICS OF PLASMAS LA English DT Article ID NONLINEAR DYNAMICS; BOOTSTRAP CURRENT; MAGNETIC ISLANDS; PLASMA; TFTR; CONFINEMENT; TRANSPORT; PRESSURE AB Stability criterion for neoclassical tearing modes is obtained from the drift kinetic equation. A finite amplitude of a magnetic island is required for mode excitation. The threshold is determined by the ratio of the transversal and the parallel transport near the island when the flattening of the pressure profile eliminates the bootstrap current. A number of supershots from the database of the Tokamak Fusion Test Reactor (TFTR) [D. J, Grove and D. M. Meade, Nucl. Fusion 25, 1167 (1985)] are compared with the theory. In cases where the modes were observed in experiment the stability criterion was violated. (C) 1996 American Institute of Physics. C1 TROITSK INST INNOVAT & FUS RES,TROITSK 142092,RUSSIA. RP Gorelenkov, NN (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 18 TC 40 Z9 41 U1 1 U2 14 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3379 EP 3385 DI 10.1063/1.871614 PG 7 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700021 ER PT J AU Batishchev, OV Xu, XQ Byers, JA Cohen, RH Krasheninnikov, SI Rognlien, TD Sigmar, DJ AF Batishchev, OV Xu, XQ Byers, JA Cohen, RH Krasheninnikov, SI Rognlien, TD Sigmar, DJ TI Kinetic effects on particle and heat fluxes in detached plasmas SO PHYSICS OF PLASMAS LA English DT Article ID ITER DIVERTOR; SIMULATION AB A model of high recycling scrape-off layer plasmas in tokamaks is presented where both ion and electron species are described by nonlinear kinetic equations, Coulomb and charged-neutral particle collisions an included. The ambipolar electric field and electrostatic sheath potential are evaluated self-consistently. Two models of fluid neutral transport are used to distinguish the neutral density variation for different tokamak divertor geometries. These models are incorporated into a comprehensive three-dimensional (1-D,2 V) hybrid collisional particle-in-cell-Monte Carlo code wt [Contrib. Plasma Phys, 34, 436 (1994)]. This code is used to investigate the effects of neutrals on divertor plasma detachment phenomena and on parallel heat and particle fluxes in the presence of strong gradients where fluid descriptions break down. Results are given for simulations of detached and attached divertor plasmas, and comparisons are made with solutions from a one-dimensional fluid model and with experimental observations. (C) 1996 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. LODESTAR RES CORP,BOULDER,CO 80301. MV KELDYSH APPL MATH INST,MOSCOW 125047,RUSSIA. IV KURCHATOV ATOM ENERGY INST,MOSCOW 123098,RUSSIA. RP Batishchev, OV (reprint author), MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139, USA. NR 26 TC 18 Z9 18 U1 1 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3386 EP 3396 DI 10.1063/1.871615 PG 11 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700022 ER PT J AU Chu, TK AF Chu, TK TI Velocity-space asymmetry of the trapping boundary of charged particles at and near the magnetic axis of a tokamak SO PHYSICS OF PLASMAS LA English DT Article AB In tokamaks, the trajectory of a trapped particle has a pair of poloidal turning points where V-z reverses direction. They form a stagnation point when coalescing on the equatorial plane. The trajectories traversing the stagnation point, because of the finite Larmor radius and hence the banana width, have a threefold degeneracy: a pinch orbit and a kidney orbit of a trapped particle, and a loop orbit of a passing particle. When traversing the stagnation point from a pinch orbit, the trajectory of a negative-V-parallel to particle must change to a loop orbit and the particle becomes passing, and that of a positive-V-parallel to particle must change to a kidney orbit and the particle remains trapped. The trapping boundary is asymmetric in V-parallel to. The percentage of trapped particles in a species in a local Maxwellian plasma depends on the radial distance r as well as on the Larmor radius of its thermal particle. At the axis the trapping ratio is finite and more ions than electrons are trapped; for typical parameters in Princeton Beta Experiment-Modification [Bell ct al., Phys. Fluids B 2, 1271 (1990)], for example, 2.2% of electrons and 8.6% of deuterons are trapped. Up to a radial distance of similar to 10 times the Larmor radius of a thermal particle, the trapping ratio increases as r(2). (C) 1996 American Institute of Physics. RP Chu, TK (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 6 TC 13 Z9 13 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3397 EP 3409 DI 10.1063/1.871616 PG 13 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700023 ER PT J AU Bowers, RL Nakafuji, G Greene, AE McLenithan, KD Peterson, DL Roderick, NF AF Bowers, RL Nakafuji, G Greene, AE McLenithan, KD Peterson, DL Roderick, NF TI Two-dimensional modeling of x-ray output from switched foil implosions on Procyon SO PHYSICS OF PLASMAS LA English DT Article AB A series of two-dimensional radiation magnetohydrodynamic calculations are presented of a Z-pinch implosion using a plasma flow switch. Results from a recent experiment using the high explosive driven generator Procyon, which delivered 16.5 MA to a plasma flow switch and switched about 15 MA into a static load, are used to study the implosion of a 29 mg load foil [J. H. Goforth et al., ''Review of the Procyon Explosive Pulsed Power System,'' in Ninth IEEE Pulsed Power Conference, June 1993, Albuquerque, edited by K. R. Prestwich and W. L. Baker (Institute of Electrical and Electronics Engineers, Piscataway, NJ, 1993), p. 36]. The interaction of the switch with the load plasma and the effects of background plasma on the total radiation output is examined. Models which assume ideal switching are also included. Also included are the effects of perturations in the load plasma which may be associated with initial vaporization of the load foil. If the background plasma density in the switch region and in the load region does not affect the dynamics, the pinch is predicted to produce a total radiation output of about 4 MJ. Including perturbations of the load plasma associated with switching and assuming a background plasma density after su itching in excess of 10(-7) g/cm(3) results in a total output from the pinch of about 0.6 MJ. (C) 1996 American Institute of Physics. C1 UNIV NEW MEXICO, DEPT CHEM & NUCL ENGN, ALBUQUERQUE, NM 87131 USA. RP Bowers, RL (reprint author), LOS ALAMOS NATL LAB, POB 1663, LOS ALAMOS, NM 87545 USA. NR 12 TC 9 Z9 9 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD SEP PY 1996 VL 3 IS 9 BP 3448 EP 3468 DI 10.1063/1.871594 PG 21 WC Physics, Fluids & Plasmas SC Physics GA VF937 UT WOS:A1996VF93700029 ER PT J AU Ball, J Hamilton, J AF Ball, J Hamilton, J TI Russell Lee Robinson - Obituary SO PHYSICS TODAY LA English DT Item About an Individual C1 VANDERBILT UNIV,NASHVILLE,TN. RP Ball, J (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD SEP PY 1996 VL 49 IS 9 BP 110 EP 110 DI 10.1063/1.2807782 PG 1 WC Physics, Multidisciplinary SC Physics GA VG676 UT WOS:A1996VG67600024 ER PT J AU Mander, LN Owen, DJ Croker, SJ Gaskin, P Hedden, P Lewis, MJ Talon, M Gage, DA Zeevaart, JAD Brenner, ML Sheng, CX AF Mander, LN Owen, DJ Croker, SJ Gaskin, P Hedden, P Lewis, MJ Talon, M Gage, DA Zeevaart, JAD Brenner, ML Sheng, CX TI Identification of three C-20-gibberellins: GA(97) (2 beta-hydroxy-GA(53)), GA98 (2 beta-hydroxy-GA44) and GA99 (2 beta-hydroxy-GA(19)) SO PHYTOCHEMISTRY LA English DT Article DE Spinacea oleracea; Hordeum vulgare; Lycopersicon esculentum; Pisum sativum; Zea mays; 2 beta,13-dihydroxy-C-20-gibberellins GA(97), GA(98), GA(99) ID LYCOPERSICON-ESCULENTUM; GIBBERELLINS; SEEDLINGS; SPINACH; GROWTH AB Three new C-20-gibberellins, GA(97) (2 beta-hydroxy-GA(53)), GA(98) (2 beta-hydroxy-GA(44)) and GA(99) (2 beta-hydroxy-GA(19)), have all been isolated from spinach, GA(97) also from tomato root cultures and pea pods, and GA(98) from maize pollen. The structures of these compounds were established by GC-mass spectrometric comparisons of the trimethylsilylated methyl esters with authentic samples prepared from gibberellic acid (GA(3)). Copyright (C) 1996 Elsevier Science Ltd C1 UNIV BRISTOL,DEPT AGR SCI,IACR,LONG ASHTON RES STN,BRISTOL BS18 9AF,AVON,ENGLAND. MICHIGAN STATE UNIV,MSU DOE PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT BIOCHEM,E LANSING,MI 48824. UNIV MINNESOTA,DEPT HORT SCI,ST PAUL,MN 55108. RP Mander, LN (reprint author), AUSTRALIAN NATL UNIV,INST ADV STUDIES,RES SCH CHEM,CANBERRA,ACT 0020,AUSTRALIA. RI Talon, Manuel/C-8540-2014 OI Talon, Manuel/0000-0003-4291-9333 NR 20 TC 25 Z9 25 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0031-9422 J9 PHYTOCHEMISTRY JI Phytochemistry PD SEP PY 1996 VL 43 IS 1 BP 23 EP 28 DI 10.1016/0031-9422(96)00251-8 PG 6 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA VE052 UT WOS:A1996VE05200002 PM 8987503 ER PT J AU Machalek, KM Davison, IR Falkowski, PG AF Machalek, KM Davison, IR Falkowski, PG TI Thermal acclimation and photoacclimation of photosynthesis in the brown alga Laminaria saccharina SO PLANT CELL AND ENVIRONMENT LA English DT Article DE Laminaria saccharina; Phaeophyta; photoacclimation; photosynthesis; physiological ecology; thermal acclimation ID ELECTRON-TRANSPORT CAPACITY; HELGOLAND NORTH-SEA; PHAEODACTYLUM-TRICORNUTUM; ECOTYPIC DIFFERENTIATION; DUNALIELLA-TERTIOLECTA; MARINE-PHYTOPLANKTON; GROWTH TEMPERATURE; THYLAKOID MEMBRANE; SUBLITTORAL REGION; CHLORELLA-VULGARIS AB Thermal acclimation and photoacclimation of photosynthesis were compared in Laminaria saccharina sporophytes grown at temperatures of 5 and 17 degrees C and irradiances of 15 and 150 mu mol photons m(-2) s(-1). When measured at a standard temperature (17 degrees C), rates of light-saturated photosynthesis (P-max) were higher in 5 degrees C-grown algae (c. 0.9 mu mol O-2 m(-2) s(-1)) than in 17 degrees C-grown algae (c. 0.9 mu mol O-2 m(-2) s(-1)). Concentrations of Rubisco were also 3-fold higher (per unit protein) in 5 degrees C-grown algae than in algae grown at 17 degrees C, Light-limited photosynthesis responded similarly to high temperature and low light. Photon yields (alpha) were higher in algae grown at high temperature (regardless of light), and at 5 degrees C in low light, than in algae grown at 5 degrees C in high light. Differences in a were correlated with light absorption; both groups of 17 degrees C algae and 5 degrees C low-light algae absorbed c. 75% of incident light, whereas 5 degrees C high-light algae absorbed c. 55%. Increased absorption was correlated with increases in pigment content, PSII reaction centre densities and the fucoxanthin-Chi ale protein complex (FCP), Changes in alpha were also attributed, in part, to changes in the maximum photon yield of photosynthesis (phi(max)), PSI reaction centre densities were unaffected by growth temperature, but the areal concentration of PSI in low-light-grown algae was twice that of high-light-grown algae (c. 160.0 versus 80.0 nmol m(-2)), We suggest that complex metabolic regulation allows L. saccharina to optimize photosynthesis over the wide range of temperatures and light levels encountered in nature. C1 UNIV MAINE,DEPT PLANT BIOL,ORONO,ME 04469. UNIV MAINE,CTR MARINE STUDIES,ORONO,ME 04469. BROOKHAVEN NATL LAB,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973. NR 63 TC 59 Z9 61 U1 0 U2 17 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0140-7791 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD SEP PY 1996 VL 19 IS 9 BP 1005 EP 1016 DI 10.1111/j.1365-3040.1996.tb00207.x PG 12 WC Plant Sciences SC Plant Sciences GA VH086 UT WOS:A1996VH08600001 ER PT J AU vanHoof, A Green, PJ AF vanHoof, A Green, PJ TI Premature nonsense codons decrease the stability of phytohemagglutinin mRNA in a position-dependent manner SO PLANT JOURNAL LA English DT Article ID MESSENGER-RNA STABILITY; HIGHER-PLANTS; READING FRAME; C-FOS; GENE; MUTATIONS; ARABIDOPSIS; SEQUENCES; TOBACCO; CIS AB Premature termination of translation has often been associated with decreased mRNA accumulation in plants, but the affected step in gene expression has not been identified. To investigate this problem, the expression of wild-type and mutant alleles of the bean phytohemagglutinin (PHA) gene has been examined in tobacco cells and transgenic plants. Measurement of mRNA decay rates in stably transformed cell lines demonstrated that premature nonsense codons markedly destabilized the mRNA. This decreased stability was also reflected by decreased accumulation of transcripts containing premature nonsense codons in transgenic plants. The positional dependence of the nonsense codon effect was evaluated by introducing premature nonsense codons at different distances from the PHA AUG start codon. Transcripts with nonsense codons about 20, 40 or 60% of the way through the normal PHA coding region yielded highly unstable mRNAs, whereas a transcript with a nonsense codon at 80% was as stable as wild-type. The ability to recognize and rapidly degrade certain transcripts with early nonsense codons could provide plant cells with a means to minimize the production of wasteful and possibly deleterious truncated proteins. C1 MICHIGAN STATE UNIV,DOE,PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT BIOCHEM,E LANSING,MI 48824. NR 45 TC 87 Z9 88 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0960-7412 J9 PLANT J JI Plant J. PD SEP PY 1996 VL 10 IS 3 BP 415 EP 424 PG 10 WC Plant Sciences SC Plant Sciences GA VH089 UT WOS:A1996VH08900003 PM 8811857 ER PT J AU Anderson, LE Huppe, HC Li, AD Stevens, FJ AF Anderson, LE Huppe, HC Li, AD Stevens, FJ TI Identification of a potential redox-sensitive interdomain disulfide in the sedoheptulose bisphosphatase of Chlamydomonas reinhardtii SO PLANT JOURNAL LA English DT Article ID CHLOROPLAST SEDOHEPTULOSE-1,7-BISPHOSPHATASE; FRUCTOSE-BISPHOSPHATASE; LIGHT-MODULATION; ENZYME-ACTIVITY; FRUCTOSE-1,6-BISPHOSPHATASE; CYSTEINES; MECHANISM; SITE; GENE; DEHYDROGENASE AB In the simulated three-dimensional structure of the Chlamydomonas reinhardtii sedoheptulose bisphosphatase (EC 3.1.3.37) there are two cysteine residues close enough to one another to form a redox-sensitive disulfide bond which would cross-link the nucleotide and carbon substrate domains. Examination of the redox modulation of this sedoheptulose bisphosphatase confirms that it resembles the higher plant enzyme in being activated by reduction. In the wheat and Arabidopsis enzymes, for which there is sequence information and which, like the Chlamydomonas enzyme, can be modeled, both redox-sensitive Cys residues appear to be located on the regulatory nucleotide-binding domain. Apparently different Cys residues are involved in modulation in the algal and higher plant sedoheptulose bisphosphatases. C1 QUEENS UNIV,DEPT BIOL,KINGSTON,ON K7L 3N6,CANADA. ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. RP Anderson, LE (reprint author), UNIV ILLINOIS,DEPT BIOL SCI,845 W TAYLOR ST,CHICAGO,IL 60607, USA. NR 33 TC 11 Z9 12 U1 1 U2 1 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0960-7412 J9 PLANT J JI Plant J. PD SEP PY 1996 VL 10 IS 3 BP 553 EP 560 DI 10.1046/j.1365-313X.1996.10030553.x PG 8 WC Plant Sciences SC Plant Sciences GA VH089 UT WOS:A1996VH08900016 PM 8811868 ER PT J AU Chernys, J Kende, H AF Chernys, J Kende, H TI Ethylene biosynthesis in Regnellidium diphyllum and Marsilea quadrifolia SO PLANTA LA English DT Article DE 1-aminocyclopropane-1-carboxylic acid; 1 aminocyclopropane-1-carboxylic acid oxidase; 1-aminocyclopropane-1-carboxylic acid synthase; Marsilea; Regnellidium ID 1-AMINOCYCLOPROPANE-1-CARBOXYLIC ACID; PLANTS; ASSAY; AUXIN AB The pathway of ethylene biosynthesis was examined in two lower plants, the semi-aquatic ferns Regnellidium diphyllum Lindm. and Marsilea quandrifolia L. As a positive control for the ethylene-biosynthetic pathway of higher plants, leaves of Arabidopsis thaliana (L.) Heynh. were included in each experiment. Ethylene production by Regnellidium and Marsilea was not increased by treatment of leaflets with 1-aminocyclopropane-1-carboxylic acid (ACC), the precursor of ethylene in higher plants. Similarly, ethylene production was not inhibited by application of aminoethoxyvinylglycine and alpha-aminoisobutyric acid, inhibitors of the ethylene biosynthetic enzymes ACC synthase and ACC oxidase, respectively. However, ACC was present in both ferns, as was ACC synthase. Compared to leaves of Arabidopsis, leaflets of Regnellidium and Marsilea incorporated little [(14)]ACC and [C-14]methionine into [C-14]ethylene. From these data, it appears that the formation of ethylene in both ferns occurs mainly, if not only, via an ACC-independent route, even though the capacity to synthesize ACC is present in these lower plants. C1 MICHIGAN STATE UNIV,PLANT RES LAB,DOE,E LANSING,MI 48824. NR 17 TC 10 Z9 12 U1 1 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0032-0935 J9 PLANTA JI Planta PD SEP PY 1996 VL 200 IS 1 BP 113 EP 118 PG 6 WC Plant Sciences SC Plant Sciences GA VH608 UT WOS:A1996VH60800017 ER PT J AU Carreras, BA Newman, D Lynch, VE Diamond, PH AF Carreras, BA Newman, D Lynch, VE Diamond, PH TI Self-organized criticality as a paradigm for transport in magnetically confined plasmas SO PLASMA PHYSICS REPORTS LA English DT Article ID FOREST-FIRE MODEL; EDGE TURBULENCE; TOKAMAK; AVALANCHES; FLUCTUATIONS; CHAOS AB Many models of natural phenomena manifest the basic hypothesis of self-organized criticality (SOC) [P. Bak, C. Tang, and K. Weisenfeld, Phys. Rev. Lett., 1987, vol. 59, p. 381]. The SOC concept brings together the self-similarity on space and time scales that are common to many of these phenomena. The application of the SOC modeling concept to the plasma dynamics near marginal stability opens new possibilities of understanding issues such as Bohm scaling, profile consistency, broad-band fluctuation spectra with universal characteristics, and fast time scales. In this paper, we review the SOC concept and its possible applications to the study of transport in magnetically confined plasmas. C1 UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP Carreras, BA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. RI Lynch, Vickie/J-4647-2012 OI Lynch, Vickie/0000-0002-5836-7636 NR 51 TC 25 Z9 25 U1 0 U2 4 PU MAIK NAUKA/INTERPERIODICA PUBL PI WOODBURY PA C/O AMERICAN INST PHYSICS, 500 SUNNYSIDE BLVD, MEMBER SUBSCRIBER SERVICES, WOODBURY, NY 11797-2999 SN 1063-780X J9 PLASMA PHYS REP JI Plasma Phys. Rep. PD SEP PY 1996 VL 22 IS 9 BP 740 EP 753 PG 14 WC Physics, Fluids & Plasmas SC Physics GA VK001 UT WOS:A1996VK00100005 ER PT J AU Bonivert, WDB Cushnie, G AF Bonivert, WDB Cushnie, G TI Resource center user statistics SO PLATING AND SURFACE FINISHING LA English DT News Item RP Bonivert, WDB (reprint author), SANDIA NATL LABS,M-S 9404,BOX 969,LIVERMORE,CA 94551, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ELECTROPLATERS SOC INC PI ORLANDO PA 12644 RESEARCH PKWY, ORLANDO, FL 32826-3298 SN 0360-3164 J9 PLAT SURF FINISH JI Plat. Surf. Finish. PD SEP PY 1996 VL 83 IS 9 BP 61 EP 62 PG 2 WC Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Metallurgy & Metallurgical Engineering; Materials Science GA VD685 UT WOS:A1996VD68500017 ER PT J AU Bailey, KC AF Bailey, KC TI Policy options for combatting chemical/biological terrorism SO POLITICS AND THE LIFE SCIENCES LA English DT Editorial Material RP Bailey, KC (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU BEECH TREE PUBLISHING PI GUILDFORD PA 10 WATFORD CLOSE, GUILDFORD, SURREY, ENGLAND GU1 2EP SN 0730-9384 J9 POLIT LIFE SCI JI Polit. Life Sci. PD SEP PY 1996 VL 15 IS 2 BP 185 EP 187 PG 3 WC Biology; History & Philosophy Of Science; Social Issues SC Life Sciences & Biomedicine - Other Topics; History & Philosophy of Science; Social Issues GA VR449 UT WOS:A1996VR44900002 ER PT J AU Pilat, JF AF Pilat, JF TI Chemical and biological terrorism after Tokyo: Reassessing threats and response SO POLITICS AND THE LIFE SCIENCES LA English DT Editorial Material RP Pilat, JF (reprint author), LOS ALAMOS NATL LAB,NONPROLIFERAT & INT SECUR DIV,POB 1663,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BEECH TREE PUBLISHING PI GUILDFORD PA 10 WATFORD CLOSE, GUILDFORD, SURREY, ENGLAND GU1 2EP SN 0730-9384 J9 POLIT LIFE SCI JI Polit. Life Sci. PD SEP PY 1996 VL 15 IS 2 BP 213 EP 215 PG 3 WC Biology; History & Philosophy Of Science; Social Issues SC Life Sciences & Biomedicine - Other Topics; History & Philosophy of Science; Social Issues GA VR449 UT WOS:A1996VR44900015 ER PT J AU Zelicoff, AP AF Zelicoff, AP TI Preparing for biological terrorism: First, do no harm SO POLITICS AND THE LIFE SCIENCES LA English DT Editorial Material RP Zelicoff, AP (reprint author), SANDIA NATL LABS,TECH STAFF,DEPT 5006,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BEECH TREE PUBLISHING PI GUILDFORD PA 10 WATFORD CLOSE, GUILDFORD, SURREY, ENGLAND GU1 2EP SN 0730-9384 J9 POLIT LIFE SCI JI Polit. Life Sci. PD SEP PY 1996 VL 15 IS 2 BP 235 EP 236 PG 2 WC Biology; History & Philosophy Of Science; Social Issues SC Life Sciences & Biomedicine - Other Topics; History & Philosophy of Science; Social Issues GA VR449 UT WOS:A1996VR44900024 ER PT J AU Sakurai, K MacKnight, WJ Lohse, DJ Schulz, DN Sissano, JA Lin, JS Agamalyan, M AF Sakurai, K MacKnight, WJ Lohse, DJ Schulz, DN Sissano, JA Lin, JS Agamalyan, M TI Blends of amorphous-crystalline block copolymers with amorphous homopolymers. Morphological studies by electron microscopy and small angle scattering SO POLYMER LA English DT Article DE blends; symmetric diblock copolymers; semicrystalline block ID DOMAIN-BOUNDARY STRUCTURE; DIBLOCK COPOLYMER; ATACTIC POLYPROPYLENE; FILMS CAST; STYRENE; SYSTEMS AB A morphological study was performed with symmetric diblock ethylene-propylene copolymer (DEP) and the binary blends made from DEP and atactic polypropylene (APP) by use of small angle X-ray, light and neutron scattering, and also scanning and transmission electron microscopy. DEP contains a crystallizable polyethylene block and an amorphous atactic polypropylene block. Quenching the blends in liquid nitrogen preserved the morphology in the melt state. This quenching technique revealed that DEP forms a lamellar microdomain structure and blending DEP and APP includes morphological changes in the microdomain structures as well as macrophase separation. When the APP chain was shorter than the APP block, the addition of APP changed the morphology from a lamellar to a bicontinuous cylindrical and then a discrete cylindrical and finally to a spherical structure. On the other hand, when the APP chain was longer than the APP block, macrophase separation was observed and only a transition from a lamella to a bicontinuous cylinder occurred. These morphological transitions in the melt state can be correlated to differences in the crystallization kinetics of the blends. Copyright (C) 1996 Elsevier Science Ltd. C1 UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003. EXXON RES & ENGN CO,CORP RES LABS,ANNANDALE,NJ 08801. OAK RIDGE NATL LAB,DIV SOLID STATE,CTR SMALL ANGLE SCATTERING RES,OAK RIDGE,TN 37831. BROOKHAVEN NATL LAB,UPTON,NY 11973. KANEBO LTD,CTR RES & DEV,MIYAKOJIMA KU,OSAKA,JAPAN. NR 24 TC 21 Z9 21 U1 2 U2 6 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PD SEP PY 1996 VL 37 IS 20 BP 4443 EP 4453 DI 10.1016/0032-3861(96)00296-0 PG 11 WC Polymer Science SC Polymer Science GA VK902 UT WOS:A1996VK90200001 ER PT J AU Zheng, YJ Ornstein, RL AF Zheng, YJ Ornstein, RL TI An explanation of the single-turnover experiment of 4-chlorobenzoyl CoA dehalogenase SO PROTEIN ENGINEERING LA English DT Article ID SP STRAIN 4-CB1; HALOALKANE DEHALOGENASE; COENZYME-A; CATALYSIS; MECHANISM C1 PACIFIC NW NATL LAB,ENVIRONM & MOL SCI LAB,RICHLAND,WA 99352. NR 27 TC 0 Z9 0 U1 1 U2 1 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0269-2139 J9 PROTEIN ENG JI Protein Eng. PD SEP PY 1996 VL 9 IS 9 BP 721 EP 723 DI 10.1093/protein/9.9.721 PG 3 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA VK019 UT WOS:A1996VK01900001 PM 8888135 ER PT J AU Nandagopal, K Tadaki, DK Lamerdin, JA Serpersu, EH Niyogi, SK AF Nandagopal, K Tadaki, DK Lamerdin, JA Serpersu, EH Niyogi, SK TI The functional importance of Leu15 of human epidermal growth factor in receptor binding and activation SO PROTEIN ENGINEERING LA English DT Article DE Leu15 of human EGF; mutagenesis; NMR analysis; partial agonist; receptor binding and activation ID SITE-DIRECTED MUTAGENESIS; NUCLEAR-MAGNETIC-RESONANCE; TYROSINE KINASE-ACTIVITY; ENERGY MINIMIZATION; MUTATIONAL ANALYSIS; NMR-SPECTROSCOPY; FACTOR-ALPHA; PROTEIN; H-1-NMR; CHAIN AB The biological importance of Leu15 of epidermal growth factor (EGF) is suggested by its conservation through evolution, its critical location in the domain-domain interface of EGF and its close proximity to Arg41, a residue that is crucial for receptor binding and activation. Mutagenesis of Leu15 of human EGF (hEGF) was employed to examine the role of this residue in the ligand-receptor interaction. The relative receptor affinities of the hEGF variants, as determined by radioreceptor competition assays, varied depending on the amino acid substitution. The L15F, L15W and L15V hEGF analogues had receptor affinities 45, 26 and 18% respectively of wild type hEGF. The L15A and L15R analogues displayed receptor affinities of only 2.4 and 1.6% relative to wild type hEGF. No binding of the L15E analogue was detected. The relative agonist activities, as measured by receptor tyrosine kinase stimulation assays, generally followed a similar trend. The L15F, L15W and L15V analogues stimulated the receptor kinase to a level (V-max) similar to that for wild type hEGF. A striking difference was observed between the L15A and L15R variants; although having similar binding affinities, the L15A mutant activated the receptor to only similar to 5% of the wild type V-max in contrast to 53% for the L15R mutant. H-1-NMR analysis of the L15R and L15A mutants showed only minor structural alterations that were not sufficient to account for the dramatic losses in binding and agonist activities. The results indicate that both the size and hydrophobicity of the gamma-branched aliphatic side chain of Leu15 of hEGF are important in the formation of a catalytically active ligand-receptor complex. C1 OAK RIDGE NATL LAB,PROT ENGN & MOL MUTAGENESIS PROGRAM,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,DIV BIOL,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT BIOCHEM CELLULAR & MOL BIOL,KNOXVILLE,TN 37796. NR 44 TC 11 Z9 11 U1 3 U2 5 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0269-2139 J9 PROTEIN ENG JI Protein Eng. PD SEP PY 1996 VL 9 IS 9 BP 781 EP 788 DI 10.1093/protein/9.9.781 PG 8 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA VK019 UT WOS:A1996VK01900010 PM 8888144 ER PT J AU Romm, JJ Ervin, CA AF Romm, JJ Ervin, CA TI How energy policies affect public health SO PUBLIC HEALTH REPORTS LA English DT Article ID AIR-POLLUTION; RESPIRATORY SYMPTOMS; SULFUR-DIOXIDE; UNITED-STATES; ASSOCIATION; MORTALITY AB THE CONNECTION BETWEEN energy policy and increased levels of respiratory and cardiopulmonary disease has become clearer in the past few years, People living in cities with high levels of pollution have a higher risk of mortality than those living in less polluted cities, The pollutants most directly linked to increased morbidity and mortality include ozone, particulates, carbon monoxide, sulfur dioxide, volatile organic compounds, and oxides of nitrogen. Energy-related emissions generate the vast majority of these polluting chemicals, Technologies to prevent pollution in the transportation, manufacturing building, and utility sector; can significantly reduce these emissions while reducing the energy bills of consumers and businesses. In short, clean energy technologies represent a very cost-effective investment in public health. Some 72% of the Federal government's investment in the research, development, and demonstration of pollution prevention technologies is made by the Department of Energy, with the largest share provided by the Office of Energy Efficiency and Renewable Energy. This article will examine the connections between air pollution and health problems and will discuss what the Department of Energy is doing to prevent air pollution now and in the future. RP Romm, JJ (reprint author), US DOE,WASHINGTON,DC 20545, USA. NR 44 TC 3 Z9 3 U1 11 U2 11 PU US GOVERNMENT PRINTING OFFICE PI WASHINGTON PA SUPT OF DOCUMENTS, WASHINGTON, DC 20402-9325 SN 0033-3549 J9 PUBLIC HEALTH REP JI Public Health Rep. PD SEP-OCT PY 1996 VL 111 IS 5 BP 390 EP 399 PG 10 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA VH170 UT WOS:A1996VH17000011 PM 8837627 ER PT J AU Cooling, BF AF Cooling, BF TI Interdiction in southern Laos, 1960-1968 - VanStaaveren,J SO PUBLIC HISTORIAN LA English DT Book Review RP Cooling, BF (reprint author), US DOE,WASHINGTON,DC 20545, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CALIF PRESS PI BERKELEY PA JOURNALS DEPT 2120 BERKELEY WAY, BERKELEY, CA 94720 SN 0272-3433 J9 PUBL HISTORIAN JI Public Hist. PD FAL PY 1996 VL 18 IS 4 BP 178 EP 180 PG 3 WC History SC History GA VZ637 UT WOS:A1996VZ63700027 ER PT J AU Morris, GM Coderre, JA Bywaters, A Whitehouse, E Hopewell, JW AF Morris, GM Coderre, JA Bywaters, A Whitehouse, E Hopewell, JW TI Boron neutron capture irradiation of the rat spinal cord: Histopathological evidence of a vascular-mediated pathogenesis SO RADIATION RESEARCH LA English DT Article ID CENTRAL-NERVOUS-SYSTEM; LATE RADIATION-DAMAGE; WHITE MATTER; X-RAYS; TISSUE TOLERANCE; THERAPY; BRAIN; TUMORS; MODEL; SKIN AB A histopathological study was carried out on the spinal cord of rats after boron neutron capture (BNC) irradiation. Rats were irradiated with thermal neutrons alone or in combination with borocaptate sodium (BSH) or p-boronophenylalanine (BPA). Spinal cords were examined 1 year after irradiation, or at earlier times in rats developing myelopathy. Considered overall, the pathology of the spinal cord after BNC irradiation was comparable with that reported previously after X irradiation of the spinal cord in the identical strain of rat. When BSH was used as the neutron capture agent, the biologically effective dose of radiation delivered to the CNS parenchyma was a factor of similar to 2.7 lower than that delivered to the vascular endothelium. In effect, the blood vessels were selectively irradiated using this BNC modality. The resultant pathology was similar to that observed after irradiation with thermal neutrons alone or in the presence of BPA, situations in which the CNS vasculature was not selectively irradiated. This points to the vascular endothelium as being the critical target cell population, damage to which results in the development of the lesions seen in the spinal cord after BNC irradiation and, by inference, after irradiation with more conventional modalities. (C) 1996 by Radiation Research Society C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RP Morris, GM (reprint author), UNIV OXFORD,CHURCHILL HOSP,RES INST,OXFORD OX3 7LJ,ENGLAND. NR 37 TC 36 Z9 39 U1 0 U2 1 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD SEP PY 1996 VL 146 IS 3 BP 313 EP 320 DI 10.2307/3579462 PG 8 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA VE408 UT WOS:A1996VE40800009 PM 8752310 ER PT J AU Ullrich, RL Bowles, ND Satterfield, LC Davis, CM AF Ullrich, RL Bowles, ND Satterfield, LC Davis, CM TI Strain-dependent susceptibility to radiation-induced mammary cancer is a result of differences in epithelial cell sensitivity to transformation SO RADIATION RESEARCH LA English DT Article ID RAT; SUPPRESSOR; GENES; RISK; MICE AB Variations in sensitivity to radiation-induced mammary cancer among different strains of mice are well known. However, the reasons for these variations have not been determined. In the present study, the cell dissociation assay was used to determine the radiation-induced transformation frequencies in sensitive BALB/c mice and resistant C57BL mice as well as the resistant hybrid B6CF(1) independent of host environment, The influence of host environment on the progression of transformed cells to the neoplastic phenotype was also examined. Results demonstrated that the variations in sensitivity among these sensitive and resistant mice are a result of inherent differences in the sensitivity of the mammary epithelial cells to radiation-induced transformation. Under the conditions used, host environment played no role in the initiation of transformed cells by radiation or in the progression of these cells to the neoplastic phenotype. (C) 1996 by Radiation Research Society C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. RP Ullrich, RL (reprint author), UNIV TEXAS,MED BRANCH,DEPT RADIAT THERAPY,DIV BIOL,GALVESTON,TX 77555, USA. FU NCI NIH HHS [R0B CA43322] NR 19 TC 46 Z9 50 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD SEP PY 1996 VL 146 IS 3 BP 353 EP 355 DI 10.2307/3579468 PG 3 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA VE408 UT WOS:A1996VE40800015 PM 8752316 ER PT J AU Cohen, L Hendrickson, FR Lennox, AJ Kroc, TK Hatcher, MA Bennett, BR AF Cohen, L Hendrickson, FR Lennox, AJ Kroc, TK Hatcher, MA Bennett, BR TI Pancreatic cancer: Treatment with neutron irradiation alone and with chemotherapy SO RADIOLOGY LA English DT Article DE neutrons; pancreas, therapeutic radiology; therapeutic radiology, experimental ID EXTERNAL BEAM; CARCINOMA; THERAPY; RADIOTHERAPY; IMPLANT AB PURPOSE: To evaluate neutron irradiation alone and with chemotherapy to treat inoperable pancreatic cancer. MATERIALS AND METHODS: Between 1977 and 1994, 173 patients (60 men, 113 women, aged 43-77 years [mean, 59 years]) with unresectable adenocarcinoma of the exocrine pancreas were treated, 106 with neutron irradiation alone and 67 with concomitant chemotherapy (fluorouracil [5-FU]). At follow-up, which was performed at 2-month intervals until death (range, 4-64 months), clinical status was recorded, noting the presence of overt metastasis and the onset of any major complications. Actuarial (Kaplan-Meier) survival tables were computed for both groups. RESULTS: For neutron irradiation alone and neutron irradiation plus chemotherapy, median survival times were 6 months and 9 months, respectively; actuarial survival rates at 3 years were 0 and 7%, respectively; major reactions (grade 3 or higher [scale of the Radiation Therapy Oncology Group and European Organization for Research and Treatment of Cancer]) occurred in 19 (18%) and 17 (25%) patients, respectively; and severe complications (grade 4) occurred in five (5%) and four (6%) patients, respectively. Most deaths were due to metastatic disease rather than to failure of local control. CONCLUSION: Neutron irradiation obliterated pancreatic adenocarcinoma at the primary site but has no effect on long-term survival. With more effective concomitant chemotherapy to prevent metastasis, local control of pancreatic cancer with neutron irradiation could lead to increased long-term survival. RP Cohen, L (reprint author), FERMILAB NATL ACCELERATOR LAB,NEUTRON THERAPY DEPT,POB 500,BATAVIA,IL 60510, USA. FU NCI NIH HHS [CA18081] NR 13 TC 6 Z9 7 U1 0 U2 0 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD SEP PY 1996 VL 200 IS 3 BP 627 EP 630 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA VD062 UT WOS:A1996VD06200011 PM 8756907 ER PT J AU Johnston, RE Washburn, D Pisano, E Burns, C Thomlinson, WC Chapman, LD Arfelli, F Gmur, NF Zhong, Z Sayers, D AF Johnston, RE Washburn, D Pisano, E Burns, C Thomlinson, WC Chapman, LD Arfelli, F Gmur, NF Zhong, Z Sayers, D TI Mammographic phantom studies with synchrotron radiation SO RADIOLOGY LA English DT Article DE breast radiography, technology; phantoms; synchrotron ID MINIMAL BREAST-CANCER AB PURPOSE: To explore the potential improvement in image contrast for breast imaging with use of monoenergetic photons. MATERIALS AND METHODS: The x-ray energy available from the National Synchrotron Light Source is from 5 to over 50 keV. A specific energy is selected with a tunable crystal monochromator. The object is scanned with a narrow beam of 80.0 x 0.5 mm. Mammography phantoms were imaged with plate and film as the imaging detectors. Phantom images were obtained at 16-24 keV and compared with images obtained with a conventional mammographic unit. RESULTS: Preliminary findings indicate improved image contrast of the monoenergetic images compared with that obtained from the conventional x-ray source, particularly at 18 keV and below. CONCLUSION: Pilot results are encouraging, and the authors presently continue to explore monoenergetic photon imaging with improved instrumentation, scatter rejection, and use of tissue samples. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973. N CAROLINA STATE UNIV,DEPT PHYS,RALEIGH,NC 27695. IIT,CHICAGO,IL 60616. INST NAZL FIS NUCL,TRIESTE,ITALY. UNIV TRIESTE,TRIESTE,ITALY. RP Johnston, RE (reprint author), UNIV N CAROLINA,DEPT RADIOL,CHAPEL HILL,NC 27599, USA. RI Chapman, Dean/I-6168-2013 OI Chapman, Dean/0000-0001-6590-4156 FU NCI NIH HHS [R01 CA60193] NR 25 TC 70 Z9 74 U1 0 U2 1 PU RADIOLOGICAL SOC NORTH AMER PI EASTON PA 20TH AND NORTHAMPTON STS, EASTON, PA 18042 SN 0033-8419 J9 RADIOLOGY JI Radiology PD SEP PY 1996 VL 200 IS 3 BP 659 EP 663 PG 5 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA VD062 UT WOS:A1996VD06200015 PM 8756911 ER PT J AU McGowan, JG Manwell, JF Avelar, C Warner, CL AF McGowan, JG Manwell, JF Avelar, C Warner, CL TI Hybrid wind/PV/diesel hybrid power systems modeling and South American applications SO RENEWABLE ENERGY LA English DT Article; Proceedings Paper CT World Renewable Energy Congress - Renewable Energy, Energy Efficiency and the Environment CY JUN 15-21, 1996 CL DENVER, CO DE hybrid power systems; off grid systems; wind/diesel systems; wind/PV energy systems modeling; autonomous solar power systems AB This paper presents an applications case study and comparison of performance results between two computational models for simulating the performance of hybrid power systems. The first model, HYBRID2, was developed at the University of Massachusetts under National Renewable Energy Laboratory (NREL) sponsorship. The second model, SOMES, was developed at Utrecht University in the Netherlands. Both models have been designed to predict the technical and economical (life cycle cost) performance of hybrid power plants that typically might be comprised of renewable energy sources, a battery bank, and a diesel generator. A South American (Brazil) based hybrid power system used to power a remote telecommunications system was used for the applications case study. A final system configuration be used as a basis for model prediction comparison was established as a result of HYBRID2 parametric evaluation. Both codes yielded similar performance results, and this work points out that the predicted performance discrepancies are due basically to different subcomponent models and differences in control strategy. The generalized nature of this work is intended to be of interest to engineers involved with the design and analysis of hybrid power systems. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP McGowan, JG (reprint author), UNIV MASSACHUSETTS,DEPT MECH & IND ENGN,RENEWABLE ENERGY LAB,AMHERST,MA 01003, USA. NR 5 TC 21 Z9 21 U1 0 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-1481 J9 RENEW ENERG JI Renew. Energy PD SEP-DEC PY 1996 VL 9 IS 1-4 BP 836 EP 847 DI 10.1016/0960-1481(96)88412-6 PG 12 WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels SC Science & Technology - Other Topics; Energy & Fuels GA UV259 UT WOS:A1996UV25900061 ER PT J AU Bull, SR AF Bull, SR TI Renewable energy transportation technologies SO RENEWABLE ENERGY LA English DT Article; Proceedings Paper CT World Renewable Energy Congress - Renewable Energy, Energy Efficiency and the Environment CY JUN 15-21, 1996 CL DENVER, CO DE alternative fuels; renewable fuels; advanced vehicles; hybrid vehicles; biofuels; fuel cells; electric vehicles; transportation AB The need for alternative and renewable transportation fuels continues to be high on the nation's agenda Substituting these fuels for petroleum can reduce dependence on foreign oil imports, improve air quality, and mitigate greenhouse gases. Renewable fuels offer the same advantages as nonrenewable alternative fuels, and, in addition, provide an inexhaustible supply. The largest potential for significant quantities of liquid renewable fuels is from the production of biofuels from cellulosic biomass such as wastes and energy crops. Advanced vehicles will provide dramatic fuel efficiency improvements and will likely have electric drive systems. An evolution of vehicles is expected to occur, beginning with an electric vehicle that fills niche markets in the near term, to hybrid vehicles by the year 2000, to fuel cell vehicles after the year 2005. With the combination of renewable fuels and high efficiency, advanced vehicles can move the nation toward a sustainable transportation system. RP Bull, SR (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 0 TC 7 Z9 7 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-1481 J9 RENEW ENERG JI Renew. Energy PD SEP-DEC PY 1996 VL 9 IS 1-4 BP 1019 EP 1024 DI 10.1016/0960-1481(96)88453-9 PG 6 WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels SC Science & Technology - Other Topics; Energy & Fuels GA UV259 UT WOS:A1996UV25900102 ER PT J AU Duchane, DV AF Duchane, DV TI Geothermal energy from hot dry rock: A renewable energy technology moving towards practical implementation SO RENEWABLE ENERGY LA English DT Article; Proceedings Paper CT World Renewable Energy Congress - Renewable Energy, Energy Efficiency and the Environment CY JUN 15-21, 1996 CL DENVER, CO DE drilling; energy development; flow testing; geothermal; HDR; hot dry rock; hydraulic fracturing; load following; reservoir AB The technology to extract useful amounts of energy from the large, ubiquitous, hot dry rock (HDR) resource has been under development for more than twenty years. Initial work during the 1970's and 1980's showed that it is possible to access and extract HDR energy using techniques originally conceived and tested by the Los Alamos National Laboratory. The process entails drilling a well deep enough to reach hot rock, injecting water at high enough pressure to open natural joints in the rock, and returning the water, heated by the rock, to the surface through one or more additional wellbores. After extraction of its thermal energy, the water is recirculated through the hot rock to mine more heat. In this closed-loop process, nothing is released to the environment except heat, and no long-term wastes accumulate. The practical potential of HDR technology was demonstrated in a series of now tests conducted from 1992 to 1995 at the HDR pilot facility at Fenton Hill, NM. These tests showed that energy can be extracted from HDR in significant amounts over extended time periods. Extensive analyses and reservoir characterization studies carried out as part of the testing program provided a large amount of information about the dynamics of the heat extraction process and confirmed that HDR energy production facilities can be operated with minimal environmental effects. Operating strategies evaluated during the test period included the production of energy at steady-state levels for extended periods and on a variable-output schedule particularly suited to load-following electricity generation. RP Duchane, DV (reprint author), LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,POB 1663,LOS ALAMOS,NM 87545, USA. NR 6 TC 3 Z9 4 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-1481 J9 RENEW ENERG JI Renew. Energy PD SEP-DEC PY 1996 VL 9 IS 1-4 BP 1246 EP 1249 DI 10.1016/0960-1481(96)88502-8 PG 4 WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels SC Science & Technology - Other Topics; Energy & Fuels GA UV259 UT WOS:A1996UV25900151 ER PT J AU Bliem, C Zangrando, F Hassani, V AF Bliem, C Zangrando, F Hassani, V TI Value analysis of advanced heat rejection systems for geothermal power plants SO RENEWABLE ENERGY LA English DT Article; Proceedings Paper CT World Renewable Energy Congress - Renewable Energy, Energy Efficiency and the Environment CY JUN 15-21, 1996 CL DENVER, CO DE heat rejection; organic rankine cycles; LEG; computer model AB A computer model is developed to evaluate the performance of the binary geothermal power plants (Organic Rankine Cycles) with various heat rejection systems and their impact on the levelized cost of electricity. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO. RP Bliem, C (reprint author), CJB CONSULTING,LONGMONT,CO, USA. NR 1 TC 3 Z9 4 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-1481 J9 RENEW ENERG JI Renew. Energy PD SEP-DEC PY 1996 VL 9 IS 1-4 BP 1250 EP 1253 DI 10.1016/0960-1481(96)88503-X PG 4 WC GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY; Energy & Fuels SC Science & Technology - Other Topics; Energy & Fuels GA UV259 UT WOS:A1996UV25900152 ER PT J AU Ulibarri, CA AF Ulibarri, CA TI Non-conventional fuel tax credits and the extraction R&D model SO RESOURCES POLICY LA English DT Article ID NON-RENEWABLE RESOURCES; EXHAUSTIBLE RESOURCES; NATURAL-RESOURCES; TAXATION; ECONOMICS; COSTS; DEPLETION AB This paper applies the extraction R&D model in examining the effects of non-conventional fuel tax credits on natural gas reserves and extraction in southwestern and northeastern New Mexico, the second largest deposits of natural gas in the USA. Testable implications of both market prices and R&D effort are specified in an empirical supply function for natural gas. The findings of the paper indicate marginal R&D costs closely parallel real wellhead prices and are an important element in explaining natural gas reserves and extraction. The policy implication is that non-conventional fuel tax credits affected both natural gas reserves and extraction activity via their influence on R&D behaviour. (C) 1997 Elsevier Science Ltd. C1 WASHINGTON STATE UNIV, RICHLAND, WA USA. RP Ulibarri, CA (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 30 TC 0 Z9 0 U1 1 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0301-4207 J9 RESOUR POLICY JI Resour. Policy PD SEP PY 1996 VL 22 IS 3 BP 207 EP 215 DI 10.1016/S0301-4207(96)00038-4 PG 9 WC Environmental Studies SC Environmental Sciences & Ecology GA WH637 UT WOS:A1996WH63700006 ER PT J AU Wilcoxon, JP Craft, SA Thurston, TR AF Wilcoxon, JP Craft, SA Thurston, TR TI Performance of a high-resolution, synchrotron-based, small-angle x-ray scattering instrument SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID INVERSE MICELLES AB We describe the construction and performance of a small-angle x-ray scattering (SAXS) instrument which we have used on several beam lines at the National Synchrotron Light Source. The analyzer crystal was a channel cut Si(1,1,1) designed for use at lambda=1.54 Angstrom with a measured efficiency of 60% and an angular resolution full width at half maximum of 0.001 degrees. In th: case of strongly scattering samples (i.e., powders), momentum transfer q between 1x10(-4) Angstrom surface has been determined using LEED I-V analysis. This surface exhibits a stable (1 x 3) reconstruction over the range of temperatures investigated (100-720 K) where the surface starts to disorder. The equilibrium structure consists of a missing-row reconstruction in which every third surface chain of the bulk-terminated structure is absent. The experimentally determined structure is at odds with first-principles calculations, which favor a relaxed but unreconstructed bulk termination. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. UNIV MARYLAND,DEPT PHYS,CANTONVILLE,MD 21228. NR 31 TC 2 Z9 2 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD SEP 1 PY 1996 VL 364 IS 3 BP L617 EP L624 DI 10.1016/0039-6028(96)00797-2 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA VF381 UT WOS:A1996VF38100003 ER PT J AU Trahanovsky, WS Lee, SK AF Trahanovsky, WS Lee, SK TI A novel flash vacuum pyrolysis route to acridine SO SYNTHESIS-STUTTGART LA English DT Article AB The flash vacuum pyrolysis (FVP) of 5,6,11,12-tetrahydrodibenzo[b,f]azocine (6) gives a good yield (75%) of acridine (7). A mechanism for this novel reaction is presented. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP Trahanovsky, WS (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU GEORG THIEME VERLAG PI STUTTGART PA P O BOX 30 11 20, D-70451 STUTTGART, GERMANY SN 0039-7881 J9 SYNTHESIS-STUTTGART JI Synthesis PD SEP PY 1996 IS 9 BP 1085 EP & PG 3 WC Chemistry, Organic SC Chemistry GA VG975 UT WOS:A1996VG97500007 ER PT J AU Kuhn, M Bzowski, A Sham, TK Rodriguez, JA Hrbek, J AF Kuhn, M Bzowski, A Sham, TK Rodriguez, JA Hrbek, J TI Ru-promoted alloying of Au and Cu ultrathin films: Photoemission studies SO THIN SOLID FILMS LA English DT Article DE alloys; photon emission; gold; copper ID CORE-LEVEL SHIFTS; X-RAY PHOTOEMISSION; ELECTRONIC-STRUCTURE; RU3(CO)12 ADSORPTION; CHARGE REDISTRIBUTION; THERMAL-DESORPTION; PARTIAL DENSITIES; SURFACE; RU(0001); AG AB For the co-adsorption of An and Cu on Ru(001), the Ru substrate promotes the alloying of the noble metals by lowering the activation energy required for the process. High-resolution photoemission spectroscopy with synchrotron radiation and X-ray photoelectron spectroscopy have been used to investigate the core-level binding energy shifts and the valence-band behaviour in a series of Au and Cu overlayers on Ru(001): 1 ML Au, 1 ML Cu, 1 ML Au and 1 ML Cu, 3 ML Au and 1 ML Cu, as well as 1 ML Au and 3 ML Cu. A monolayer of Au in contact with Ru(001) has a Au 4f(7/2) binding energy similar to 0.23 eV higher than that of Au surface atoms on pure Au but still similar to 0.1 eV smaller than that of the bulk Au. In contrast a monolayer of Cu bonded to Ru(001) exhibits a Cu 2p(7/2) binding energy similar to 0.1 eV lower than that of a Cu surface atom on pure Cu. Most of the co-deposited Au-Cu systems formed ultrathin alloys on top of the Ru(001) surface. The strain and electronic perturbations induced by the Ru substrate on the Au and Cu overlayers favour the formation of Au-Cu alloys, Binding energy shifts of the Au 5d band components and the accompanying change to the overall d-band width were found to be very sensitive to the alloying process, as has been observed in bulk Au-Cu alloys, The order of deposition, annealing, and the temperature of the substrate were all found to have an effect on the formation of Au-Cu ultrathin alloys. These ultrathin alloys exhibit Au 4f(7/2) and Cu 2p(3/2) binding energies that are significantly different from those of bulk Au-Cu alloys as a consequence of the interactions with the Ru(001) substrate. C1 UNIV WESTERN ONTARIO,DEPT CHEM,LONDON,ON N6A 5B7,CANADA. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RI Hrbek, Jan/I-1020-2013 NR 51 TC 6 Z9 6 U1 0 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD SEP 1 PY 1996 VL 283 IS 1-2 BP 209 EP 220 DI 10.1016/0040-6090(95)08255-7 PG 12 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA VP001 UT WOS:A1996VP00100035 ER PT J AU Travis, CC Zeng, CX Nicholas, J AF Travis, CC Zeng, CX Nicholas, J TI Biological model of ED01 hepatocarcinogenesis SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article ID CANCER RISK ASSESSMENT; N-NITROSODIETHYLAMINE; CELL-PROLIFERATION; 2-STAGE MODEL; DOSE-RESPONSE; LIVER FOCI; 2-ACETYLAMINOFLUORENE; RATS; DNA; CARCINOGENESIS AB The ED01 bioassay on 2-acetylaminofluorene (2-AAF)-induced hepatocarcinogenesis in BALB/c mice was analyzed using a biologically based, two-mutation model of the oncogenic process, Computer simulations indicate that 2-AAF-induced hepatocarcinogenesis has both genotoxic and promotional components, However, contrary to the current paradigm, we find that the genotoxic component of 2-AAF plays a minor role in its carcinogenicity, The ED01 hepatocarcinogenicity can be explained almost entirely to result from the promotional influence of 2-AAF on an existing pool of spontaneously initiated cells. (C) 1996 Academic Press, Inc. RP Travis, CC (reprint author), OAK RIDGE NATL LAB,CTR RISK MANAGEMENT,HLTH SCI RES DIV,OAK RIDGE,TN 37830, USA. NR 34 TC 8 Z9 8 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD SEP PY 1996 VL 140 IS 1 BP 19 EP 29 DI 10.1006/taap.1996.0193 PG 11 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA VG799 UT WOS:A1996VG79900003 PM 8806866 ER PT J AU Schultz, IR Peters, EL Newman, MC AF Schultz, IR Peters, EL Newman, MC TI Toxicokinetics and disposition of inorganic mercury and cadmium in channel catfish after intravascular administration SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article ID PLEURONECTES-PLATESSA-L; TROUT SALMO-GAIRDNERI; ICTALURUS-PUNCTATUS; TISSUE DISTRIBUTION; ACCUMULATION; PLAICE; BLOOD; RATS; PHARMACOKINETICS; METALLOTHIONEIN AB To better understand the distribution and elimination of inorganic mercury (Hg) and cadmium (Cd) in fishes, channel catfish (Ictalurus punctatus) were administered either 6.4. mu g/kg Hg-203 as HgCl2 or 4.0 mu g/kg Cd-109 as CdCl2 via a dorsal aortic cannula. Blood, plasma, and red blood cells (RBCs) were serially sampled up to 156 (Hg) or 335 (Cd) days. The fraction of the injected dose remaining in the animal (X(f)) was also determined at selected times by whole animal counting. The blood concentration and X(f)-time profiles were simultaneously fitted to a three-compartment toxicokinetic model. The plasma concentration-time profile was also separately fitted to the same three-compartment model for comparison of parameter estimates, Toxicokinetic analysis of the blood concentration and X(f)-time profile provided the following values: steady-state volume of distribution = 13.8 +/- 2.8 ml/g (Hg), 41.4 +/- 0.3 ml/g (Cd); total body clearance = 0.021 +/- 0.0006 ml/day/g (Hg), 0.0031 +/- 0.0008 ml/day/g (Cd); biological half-life (t1/2, beta) = 722 +/- 309 days (Hg), 9627 +/- 2206 days (Cd), Estimates of the t1/2, beta were up to 94 times longer if determined by simultaneous fitting of the blood concentration and X(f)-time profiles. A time-dependent accumulation of Hg and Cd by RBCs was observed with maximum RBC concentrations of Hg and Cd occurring at 7 and 12 days after injection. After injection, the tissues with the highest accumulation of Hg were the liver, trunk and head kidney, muscle, and skin, but the amount of Hg in the liver gradually increased over 156 days. Most of the Cd was accumulated by the liver and trunk kidney within 24 hr, with little change occurring after 335 days. This study demonstrates the usefulness of intravascular injection and simultaneous analysis of blood and whole body amount data in determining the elimination of metals from fishes. (C) 1996 Academic Press, Inc. C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. NR 47 TC 17 Z9 17 U1 2 U2 7 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD SEP PY 1996 VL 140 IS 1 BP 39 EP 50 DI 10.1006/taap.1996.0195 PG 12 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA VG799 UT WOS:A1996VG79900005 PM 8806868 ER PT J AU Gao, YZ Alexander, DE Rehn, LE AF Gao, YZ Alexander, DE Rehn, LE TI TEM studies for DIGM in Kr ion irradiated Au-Cu bilayers SO TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA LA English DT Article DE grain boundary migration; electron microscopy; Kr ion ID GRAIN-BOUNDARY MIGRATION; DIFFUSION AB Cross-section transmission electron microscopy (TEM) was used to study diffusion induced grain boundary migration (DIGM) in Kr ion irradiated and annealed Au-Cu bilayers. Using this technique, in combination with small probe X-ray energy dispersive spectroscopy, DIGM alloyed zones in Au were identified in an irradiated sample. C1 GEN RES INST NONFERROUS MET, BEIJING 100088, PEOPLES R CHINA. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1003-6326 J9 T NONFERR METAL SOC JI Trans. Nonferrous Met. Soc. China PD SEP PY 1996 VL 6 IS 3 BP 119 EP 121 PG 3 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA VM353 UT WOS:A1996VM35300024 ER PT J AU Paller, MH Reichert, MJM Dean, JM AF Paller, MH Reichert, MJM Dean, JM TI Use of fish communities to assess environmental impacts in South Carolina coastal plain streams SO TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY LA English DT Article ID BIOTIC INTEGRITY; BIOLOGICAL INTEGRITY; INDEX; ASSEMBLAGES; RESOURCES; QUALITY AB We developed an index of biotic integrity (IBI) and a biotic index based on fish species richness (FSBI) to assess the ecological health of streams on the Savannah River Site, a 780-km(2) U.S. Department of Energy facility located in the Sand Hills ecoregion on the upper coastal plain of South Carolina. To maintain the responsiveness of the IBI to a variety of impacts yet incorporate sufficient ecoregion specificity to achieve acceptable accuracy, we included metrics from each of six metric categories proven useful in other ecoregions (species number, species composition, trophic composition, local indicator species, fish abundance, and fish condition) but selected specific metrics within each category based on their ability to discriminate between disturbed and undisturbed sites in the Sand Hills ecoregion. We also developed a procedure based on species-area curves to remove the potentially confounding effects of site-specific differences in sample unit size and sampling effort from species number metrics. With these changes, the modified IBI was minimally affected by sample unit size and sampling effort and accurately discriminated undisturbed sites from sites affected by physical habitat alterations, thermal effluents, and chemical pollution. The FSBI, based on four species richness metrics (adjusted for the effects of sample unit size and sampling effort), discriminated between disturbed and undisturbed streams approximately as well as the modified IBI. The precision of both indices was affected by sample reach length, with samples from 50-m reaches exhibiting relatively low precision and samples from 150-m reaches high precision. C1 UNIV S CAROLINA,BELLE W BARUCH INST MARINE BIOL & COASTAL RES,COLUMBIA,SC 29208. RP Paller, MH (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,ENVIRONM SCI SECT,SAVANNAH RIVER SITE,AIKEN,SC 29808, USA. NR 18 TC 38 Z9 41 U1 0 U2 2 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 SN 0002-8487 J9 T AM FISH SOC JI Trans. Am. Fish. Soc. PD SEP PY 1996 VL 125 IS 5 BP 633 EP 644 DI 10.1577/1548-8659(1996)125<0633:UOFCTA>2.3.CO;2 PG 12 WC Fisheries SC Fisheries GA VJ089 UT WOS:A1996VJ08900001 ER PT J AU Hope, IA Albertson, DG Martinelli, SD Lynch, AS Sonnhammer, E Durbin, R AF Hope, IA Albertson, DG Martinelli, SD Lynch, AS Sonnhammer, E Durbin, R TI The C-elegans expression pattern database: A beginning SO TRENDS IN GENETICS LA English DT Article ID SEQUENCE; GENES C1 UNIV CALIF BERKELEY,EO LAWRENCE BERKELEY NATL LAB,DIV LIFE SCI,BERKELEY,CA 94720. SANGER CTR,CAMBRIDGE CB10 1SA,ENGLAND. RP Hope, IA (reprint author), UNIV LEEDS,DEPT BIOL,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. FU Wellcome Trust NR 7 TC 14 Z9 15 U1 0 U2 1 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0168-9525 J9 TRENDS GENET JI Trends Genet. PD SEP PY 1996 VL 12 IS 9 BP 370 EP 371 DI 10.1016/0168-9525(96)60033-X PG 2 WC Genetics & Heredity SC Genetics & Heredity GA VF348 UT WOS:A1996VF34800015 PM 8855668 ER PT J AU Apell, SP Echenique, PM Ritchie, RH AF Apell, SP Echenique, PM Ritchie, RH TI Sum rules for surface plasmon frequencies SO ULTRAMICROSCOPY LA English DT Article DE Poisson equation; surface plasmons; sum rules ID SCANNING TUNNELING MICROSCOPE; ENERGY-LOSS; COLLECTIVE EXCITATIONS; METAL-CLUSTERS; SPHERES; RESONANCES; COMPOSITE AB Surfaces exhibit spatially localized collective electronic excitations. The Mie modes of a particulate is one well-known example. We derive sum rules which (1) relate the surface mode frequencies of complementary systems like a sphere and a void and (2) relate the surface mode frequencies of a system with several interfaces to the ones for the individual surfaces. Our approach is of general nature since the results are based on properties of the Poisson equation and should be of interest for spectroscopies of matter in different fields of physics, in particular for scanning transmission electron microscopy. C1 CHALMERS UNIV TECHNOL, DEPT APPL PHYS, S-41296 GOTHENBURG, SWEDEN. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP Apell, SP (reprint author), UNIV BASQUE COUNTRY, FAC CIENCIAS QUIM, DEPT FIS MAT, EUSKAL HERRIKO UNIBERTSITATEA, APTDO 1072, SAN SEBASTIAN 20080, SPAIN. NR 48 TC 34 Z9 34 U1 3 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD SEP PY 1996 VL 65 IS 1-2 BP 53 EP 60 DI 10.1016/S0304-3991(96)00055-1 PG 8 WC Microscopy SC Microscopy GA VU971 UT WOS:A1996VU97100006 ER PT J AU Seltzer, KL Stover, SM Taylor, KT Willits, NH AF Seltzer, KL Stover, SM Taylor, KT Willits, NH TI The effect of hole diameter on the torsional mechanical properties of the equine third metacarpal bone SO VETERINARY SURGERY LA English DT Article ID STRENGTH; SIZE AB The torsional monotonic structural material properties of equine metacarpi with or without, either a 5/16 inch or 3/8 inch diameter bicortical lateromedial middiaphyseal hole were assessed to determine the effect of a hole on metacarpal strength. Torsional stiffness was not significantly effected by the presence of a bicortical hole, whereas yield and failure angles, torques and energies of metacarpi with a hole were 51% to 97% of those of intact bones. Significant differences were not apparent for yield and failure mechanical properties between metacarpi with a 5/16 inch diameter hole and metacarpi with a 3/8 inch diameter hole; however, postyield mechanical properties were lower for metacarpi with a 3/8 inch hole. Whereas some metacarpi with a 5/16 inch hole were capable of plastic deformation before failure, metacarpi with a 3/8 inch diameter hole appeared to have sufficient stress concentration to propagate complete fracture on structural yield. (C) Copyright 1996 by The American College of Veterinary Surgeons C1 UNIV CALIF DAVIS,SCH VET MED,DEPT ANAT PHYSIOL & CELL BIOL,VET ORTHOPED RES LAB,DAVIS,CA 95616. LAWRENCE LIVERMORE NATL LAB,VET MED TEACHING HOSP,DAVIS,CA 95616. UNIV CALIF DAVIS,DIV STAT,DAVIS,CA 95616. NR 6 TC 9 Z9 9 U1 1 U2 2 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0161-3499 J9 VET SURG JI Vet. Surg. PD SEP-OCT PY 1996 VL 25 IS 5 BP 371 EP 375 DI 10.1111/j.1532-950X.1996.tb01429.x PG 5 WC Veterinary Sciences SC Veterinary Sciences GA VG224 UT WOS:A1996VG22400001 PM 8879107 ER PT J AU Paller, MH AF Paller, MH TI Effectiveness of multiplate invertebrate samplers, periphytometers, and electrofishing for biomonitoring in streams SO WATER RESEARCH LA English DT Article DE monitoring; invertebrates; fish; algae; artificial substrates; variance; design; control sites ID SAMPLING PROGRAMS; VARIABILITY; BENTHOS; IMPACT AB Electrofishing, multiplate invertebrate samplers, and periphytometers were used to collect biological samples from 10 sites in two southeastern coastal plain streams. The objectives were to evaluate two factors that affect the quality of biomonitoring data: inter-replicate variability and sensitivity to habitat effects that could be confounded with environmental impacts. Abundance related estimates (density, catch-per-unit-effort, biomass, chlorophyll a) exhibited high inter-replicate variability necessitating the collection of large numbers of samples (25) to detect small (40%) differences among sites. Species number estimates exhibited much lower inter-replicate variability and sample number requirements (6 samples to detect a 40% difference). Electrofishing generally required fewer samples and less time than the other methods to obtain comparable levels of precision. Species composition and abundance estimates produced by all methods were affected by longitudinal changes in habitat that caused differences between control and impact sites that could be mistaken for impacts. Biomonitoring programs can be improved by assessing the relationship between statistical power and replicate number, collecting as many replicates as is feasible, collecting pre-impact and post-impact data when possible, matching control and impact sites on habitat, comparing the ecological characteristics (e.g. pollution tolerance) of organisms at control and impact sites, and using comparisons based on species number rather than abundance. Copyright (C) 1996 Elsevier Science Ltd RP Paller, MH (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,ENVIRONM SCI SECT,SAVANNAH RIVER SITE,AIKEN,SC 29808, USA. NR 19 TC 7 Z9 7 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0043-1354 J9 WATER RES JI Water Res. PD SEP PY 1996 VL 30 IS 9 BP 2095 EP 2101 DI 10.1016/0043-1354(96)00015-2 PG 7 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA VM119 UT WOS:A1996VM11900020 ER PT J AU Banerjee, S AF Banerjee, S TI Estimating water solubilities of organics as a function of temperature SO WATER RESEARCH LA English DT Article DE water solubility temperature; UNIFAC algorithm; organics ID ACTIVITY-COEFFICIENTS; MIXTURES AB A simple UNIFAC-based algorithm for estimating the water solubilities of a variety of organics in the temperature range 10-80 degrees C is developed. The procedure covers ten orders of magnitude in solubility with an average deviation of 0.5 log units. The solubilities of ionizable solids are the most sensitive and those of non-ionizable liquids are the least sensitive to temperature change. Copyright (C) 1996 Elsevier Science Ltd C1 BROOKHAVEN NATL LAB,DIV RADIO SCI,UPTON,NY 11973. NR 8 TC 6 Z9 6 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0043-1354 J9 WATER RES JI Water Res. PD SEP PY 1996 VL 30 IS 9 BP 2222 EP 2225 DI 10.1016/0043-1354(96)00306-5 PG 4 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA VM119 UT WOS:A1996VM11900036 ER PT J AU Murphy, EM Ginn, TR Phillips, JL AF Murphy, EM Ginn, TR Phillips, JL TI Geochemical estimates of paleorecharge in the Pasco Basin: Evaluation of the chloride mass balance technique SO WATER RESOURCES RESEARCH LA English DT Article ID SOIL-WATER MOVEMENT; DESERT SOILS; GROUNDWATER-RECHARGE; UNSATURATED ZONE; HANFORD SITE; TRITIUM; TRACERS; PROFILES; LIQUID; CL-36 AB The Pasco Basin in southeastern Washington State provides a unique hydrogeologic setting for evaluating the chloride mass balance technique for estimating recharge. This basin was affected by late Pleistocene catastrophic floods when glacial darns in western Montana and northern Idaho were breached. It is estimated that multiple Missoula floods occurred between similar to 13,000 and 15,000 years B.P. and reached a high water elevation of similar to 350 m. These floods removed accumulated chloride from the sediment profile, effectively resetting the chloride mass balance clock at the beginning of the Holocene. The rate of chloride accumulation go in the sediments was determined by two methods and compared. The first method measured go by dividing the calculated natural fallout of Cl-36 by a measured ratio of Cl-36/Cl in the pore water, while the second method used the total mass of chloride in the profile divided by the length of time that atmospheric chloride had accumulated since the last flood. Although the two methods are based on different approaches, they showed close agreement. In laboratory studies the sediment to water ratio for chloride extraction was sensitive to the grain size of the sediments; low extraction ratios in silt loam sediments led to significant underestimation of pore water chloride concentration. Br/Cl ratios were useful for distinguishing nonatmospheric (e.g., rock) sources of chloride. Field studies showed little spatial variability in estimated recharge at a given site within the basin but showed significant topographic control on recharge rates in this semiarid environment. An extension of the conventional chloride mass balance model was used to evaluate chloride profiles under transient, time-varying annual precipitation conditions. This model was inverted to determine the paleorecharge history for a given soil chloride profile, and the parameters of the root extraction model required to estimate paleoprecipitation. C1 PACIFIC NW LAB, ENVIRONM & ENERGY SCI DIV, RICHLAND, WA 99352 USA. NR 60 TC 47 Z9 48 U1 1 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0043-1397 EI 1944-7973 J9 WATER RESOUR RES JI Water Resour. Res. PD SEP PY 1996 VL 32 IS 9 BP 2853 EP 2868 DI 10.1029/96WR01529 PG 16 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA VE901 UT WOS:A1996VE90100018 ER PT J AU Blau, PJ Gardner, JK AF Blau, PJ Gardner, JK TI Tribological characteristics of graded pencil cores on paper SO WEAR LA English DT Article DE pencil cores; paper; graphite; friction AB Despite the long, rich history and widespread use of pencils and paper, the literature of tribology is remarkably devoid of published research on the subject. The present investigation was conducted to investigate the effects of writing core (i.e. ''lead'') grade on the wear response and static and kinetic friction coefficients associated with writing on three types of paper: standard 20 lb copier paper, heavier manila cover stock, and Tyvek(TM), a spunbonded olefin paper product commonly used for mailing envelopes and surgical clothing. Three mechanical pencil core grades (2B, HB, and 2H) were used. These materials varied in Knoop microindentation hardness by a factor of approximately two. Static friction coefficients were determined from simple, inclined-plane tests of the various core-paper combinations, and kinetic friction coefficients were determined by pin-on-disk tests. Against all but the Tyvek(TM), static friction coefficients were not dependent on core grade or paper type. Kinetic friction coefficients were not clearly correlated with paper type or core grade; however, significant differences in the core wear and paper in-filling characteristics were observed. Scanning electron microscopy and quantitative image analysis were used to study the manner and extent to which the core wear particles were embedded and agglomerated within the tangled fibers of the papers. A clear correlation was observed between the degree of transfer of wear particles to the paper and the hardness of the core in two of the three paper types. C1 GEORGIA INST TECHNOL,GEORGE W WOODRUFF SCH MECH ENGN,ATLANTA,GA 30332. RP Blau, PJ (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 18 TC 2 Z9 2 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD SEP PY 1996 VL 197 IS 1-2 BP 233 EP 241 DI 10.1016/0043-1648(96)06952-9 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA VE776 UT WOS:A1996VE77600028 ER PT J AU Bahadur, S Gong, DL Anderegg, J AF Bahadur, S Gong, DL Anderegg, J TI Investigation of the influence of CaS, CaO and CaF2 fillers on the transfer and wear of nylon by microscopy and XPS analysis SO WEAR LA English DT Article DE friction; wear; transfer film; filled composites; fillers; XPS study ID COPPER-COMPOUNDS; POLYTETRAFLUOROETHYLENE; BEHAVIOR; FRICTION AB The effect of CaS, CaO and CaF2 fillers on the transfer, friction and wear behaviors of nylon was studied. Sliding was performed in ambient atmosphere at a speed of 1.0 m s(-1) and a load of 19.6 N, and a pin-on-disk configuration was used. The filler content in nylon was fixed at 35% by volume. The counterface disk was made of hardened tool steel. The experimental results showed that CaO and CaS were effective in reducing the wear of nylon, but CaF2 increased it greatly. The tribochemical studies by XPS revealed that some CaS decomposed during sliding so that FeS and FeSO4 were produced. No such decomposition was found in the case of CaF2. The comparison of the bonding strengths of these fillers revealed that the bonding strengths of the compounds that decomposed were lower than that of CaF2 which did not decompose. It was concluded that FeS and FeSO4 increased adhesion between the composite transfer film and the steel substrate. Furthermore, the ability of the fillers to help in the formation of a uniform and continuous composite transfer film and to promote adhesion between the transfer film and its substrate contributed to increased wear resistance. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP Bahadur, S (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT MECH ENGN,AMES,IA 50011, USA. NR 22 TC 45 Z9 52 U1 2 U2 11 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD SEP PY 1996 VL 197 IS 1-2 BP 271 EP 279 DI 10.1016/0043-1648(96)06985-2 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA VE776 UT WOS:A1996VE77600033 ER PT J AU Zhang, H Hou, PY Stringer, J AF Zhang, H Hou, PY Stringer, J TI The effect of temperature gradient on steel tube wastage in a bubbling fluidized bed simulator SO WEAR LA English DT Article DE fluidized bed combustor; erosion-corrosion; 1018 steel; temperature gradient ID SIMULTANEOUS EROSION; WEAR; ENVIRONMENT; COMBUSTORS; MECHANISMS; CORROSION; ATTACK AB This paper describes a unique laboratory rig that simulates the interaction between dense particles and in-bed tubes in bubbling fluidized bed combustors. In this test rig, a tubular specimen is actuated periodically in a partially fluidized bed. A coolant can flow continuously through the specimen in order to achieve a surface temperature lower than that of the bed. Preliminary tests performed on 1018 steel both under isothermal and temperature difference conditions are described and compared. During the temperature difference test, the bed was held at 700 degrees C and the specimen surface at 200 degrees C. Results showed a wear rate five times higher under these conditions compared to the isothermal test, but neither the wear mechanism nor the circumferential wear distribution was altered. As in previous studies using isothermal test conditions, material loss was mainly caused by abrasion of the metal by the bed particles. The deposition of an adherent layer composed of bed material onto the specimen surface acted as a protection against much of the damaging impact. The degree of such deposition was significantly less on specimens tested under the temperature difference condition, and this is believed to be the main cause for the observed increase in wear. C1 LAWRENCE BERKELEY NATL LAB,DIV MAT SCI,BERKELEY,CA 94720. JILIN ELECT POWER RES INST,CHANGCHUN 130021,JILAN,PEOPLES R CHINA. ELECT POWER RES INST,PALO ALTO,CA 94304. NR 33 TC 4 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD SEP PY 1996 VL 197 IS 1-2 BP 286 EP 294 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA VE776 UT WOS:A1996VE77600035 ER PT J AU Ayik, S Chomaz, P Colonna, M Randrup, J AF Ayik, S Chomaz, P Colonna, M Randrup, J TI Analysis of Boltzmann-Langevin dynamics in nuclear matter SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID ONE-BODY DYNAMICS; TRANSPORT-THEORY; INSTABILITIES; FLUCTUATIONS; COLLISIONS; SIMULATION AB The Boltzmann-Langevin dynamics of harmonic modes in nuclear matter is analyzed within linear-response theory, both with an elementary treatment and by utilizing the frequency-dependent response function. It is shown how the source terms agitating the modes can be obtained from the basic BL correlation kernel by a simple projection onto the associated dual basis states, which are proportional to the RPA amplitudes and can be expressed explicitly. The source terms for the correlated agitation of any two such modes can then be extracted directly, without consideration of the other modes. This facilitates the analysis of collective modes in unstable matter and makes it possible to asses the accuracy of an approximate projection technique employed previously. C1 GANIL, F-14021 CAEN, FRANCE. LNS, I-95129 CATANIA, ITALY. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. RP Ayik, S (reprint author), TENNESSEE TECHNOL UNIV, DEPT PHYS, COOKEVILLE, TN 38505 USA. NR 26 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0939-7922 J9 Z PHYS A-HADRON NUCL JI Z. Phys. A.-Hadrons Nuclei PD SEP PY 1996 VL 355 IS 4 BP 407 EP 413 DI 10.1007/s002180050130 PG 7 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA VH763 UT WOS:A1996VH76300015 ER PT J AU Simpson, JA Cowley, RA Jehan, DA Ward, RCC Wells, MR McMorrow, DF Clausen, KN Thurston, TR Gibbs, D AF Simpson, JA Cowley, RA Jehan, DA Ward, RCC Wells, MR McMorrow, DF Clausen, KN Thurston, TR Gibbs, D TI Co-existence of long- and short-range magnetic correlations in holmium-erbium superlattices SO ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER LA English DT Article ID DY-Y SUPERLATTICES; X-RAY SCATTERING; ER THIN-FILMS; GIANT MAGNETORESISTANCE; ORDER; MULTILAYERS; LAYERS AB The effect of competing crystal-field anisotropies on magnetic order has been investigated in a series of Ho/Er superlattices using a combination of x-ray and neutron scattering techniques. For temperatures in the interval T-N(Er) less than or equal to T less than or equal to T-N(Ho) the Ho basal-plane order propagates coherently through the paramagnetic Er over a typical length scale of 1000 Angstrom. At low temperatures the Ho moments retain their bulk-like helical configuration, whereas the magnetic structure in the Er blocks has both basal-plane and c-axis components. Below T-N(Er), the coherence length of the basal-plane order decreases on cooling, while the longitudinal component of the Er moments fails to order across the Ho block. It is argued that these results require an extension of current models of indirect exchange in superlattices to explicitly include the superlattice band structure. C1 RISO NATL LAB, DEPT SOLID STATE PHYS, DK-4000 ROSKILDE, DENMARK. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP Simpson, JA (reprint author), UNIV OXFORD, CLARENDON LAB, PARKS RD, OXFORD OX1 3PU, ENGLAND. RI McMorrow, Desmond/C-2655-2008 OI McMorrow, Desmond/0000-0002-4947-7788 NR 36 TC 16 Z9 16 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0722-3277 J9 Z PHYS B CON MAT JI Z. Phys. B-Condens. Mat. PD SEP PY 1996 VL 101 IS 1 BP 35 EP 46 DI 10.1007/s002570050178 PG 12 WC Physics, Condensed Matter SC Physics GA VE205 UT WOS:A1996VE20500006 ER PT J AU Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O Barrio, JM Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C Bosworth, S Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V Charpentier, P Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DelaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT Miagkov, A Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundin, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G AF Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O Barrio, JM Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W Booth, PSL Borisov, G Bosio, C Bosworth, S Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V Charpentier, P Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DelaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT Miagkov, A Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundin, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G TI Measurement of the B-d(0) oscillation frequency using kaons, leptons and jet charge SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LUND MONTE-CARLO; FORWARD-BACKWARD ASYMMETRY; TIME-DEPENDENCE; MIXING PARAMETER; DECAY; DELPHI; FRAGMENTATION; PHYSICS; C+ AB A measurement of the mass difference, Delta m(d), be tween the two physical B-d(0) states has been obtained from the analysis of the impact parameter distribution of a lepton emitted at large transverse momentum (p(t)) relative to the jet axis and from the analysis of the flight distance distribution of secondary vertices tagged by either a high p(t) lepton or an identified kaon. In the opposite hemisphere of the event, the charge of the initial quark has been evaluated using a high p(t) lepton, a charged kaon or the mean jet charge, With 1.7 million hadronic Z(0) decays recorded by DELPHI between 1991 and 1993, Delta m(d) is found to be: Delta m(d) = 0.531 (+0.050)(-0.046) (stat.) +/- 0.078 (syst.) ps(-1). C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. UNIV ESTADUAL RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL. COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,SK-84215 BRATISLAVA,SLOVAKIA. COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV STRASBOURG 1,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. NATL CTR SCI RES DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. CAS,DIV HIGH ENERGY PHYS,INST PHYS,FZU,PRAGUE 18040 8,CZECH REPUBLIC. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,CNRS,IN2P3,INST NUCL SCI,F-38026 GRENOBLE,FRANCE. SEFT,RES INST HIGH ENERGY PHYS,FIN-00014 HELSINKI,FINLAND. JOINT INST NUCL RES,MOSCOW 101000,RUSSIA. UNIV KARLSRUHE,INST EXPT KERNPHYS,D-76128 KARLSRUHE,GERMANY. STANISLAW STASZIC UNIV MIN & MET,PL-30055 KRAKOW,POLAND. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,CNRS,IN2P3,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV PARIS 06,CNRS,IN2P3,LPNHE,F-75252 PARIS 05,FRANCE. UNIV PARIS 07,CNRS,IN2P3,LPNHE,F-75252 PARIS 05,FRANCE. LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. INST NUCL PHYS,PL-30055 KRAKOW,POLAND. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. CHARLES UNIV,NC,NUCL CTR,MFF,PRAGUE 18000 8,CZECH REPUBLIC. NIKHEF H,NL-1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OVIEDO,DPTO FIS,OVIEDO 33006,SPAIN. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. CENS,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UC,CSIC,IST SUPER SANITA,SANTANDER 39006,SPAIN. INST HIGH ENERGY PHYS,PROTVINO,RUSSIA. UNIV LJUBLJANA,JOZEF STEFAN INST,SI-61000 LJUBLJANA,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,SI-61000 LJUBLJANA,SLOVENIA. UNIV STOCKHOLM,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. RP Abreu, P (reprint author), INST SUPER TECN,LIP,FCUL,P-1000 LISBON,PORTUGAL. RI Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; de Paula, Leandro/I-9278-2012; Andreazza, Attilio/E-5642-2011; Michelotto, Michele/A-9571-2013; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Yip, Kin/D-6860-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Chudoba, Jiri/G-7737-2014; Tome, Bernardo/J-4410-2013; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; Cabrera Urban, Susana/H-1376-2015; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Rames, Jiri/H-2450-2014; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Navas, Sergio/N-4649-2014; Zaitsev, Alexandre/B-8989-2017; OI Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; de Paula, Leandro/0000-0002-4984-7734; Andreazza, Attilio/0000-0001-5161-5759; De Angelis, Alessandro/0000-0002-3288-2517; PREST, MICHELA/0000-0003-3161-4454; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Michelotto, Michele/0000-0001-6644-987X; Yip, Kin/0000-0002-8576-4311; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Tome, Bernardo/0000-0002-7564-8392; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Navas, Sergio/0000-0003-1688-5758; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Sannino, Mario/0000-0001-7700-8383; Maio, Amelia/0000-0001-9099-0009 NR 40 TC 12 Z9 12 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. 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Bosworth, S Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V Charpentier, P Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DelaVaissiere, C DeLotto, B DeMin, A DePaula, L DestJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Dufour, Y Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A Novak, M OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H RAtoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, RB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Rybin, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, L Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G TI First study of the interference between initial and final state radiation at the Z resonance SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID CHARGE ASYMMETRY; ENERGIES AB The interference between initial and final state radiation in the process e(+)e(-) --> mu(+)mu(-) at root s approximate to M(Z) has been studied by measuring the forward-backward asymmetry as a function of the acoplanarity angle between the final state muons. The interference is expected to be sensitive to the space-time separation of the initial and final state radiation. The measured asymmetry distribution has been compared to theoretical predictions using the KORALZ generator, with and without O(alpha) interference, The magnitude of the interference between initial and final state radiation was found to be of the order predicted and to follow the expected distribution. Using the theoretical predictions, a value of Gamma(Z) = 2.50 +/- 0.21 (stat.) +/- 0.06 (syst.) GeV. has been extracted, The interpretation of this result is discussed. There is an additional uncertainty in the estimate of Gamma(Z) from as yet uncalculated higher order interference terms. By assuming a value of Gamma(Z) consistent with the world average, the data were used to estimate the size of these uncalculated corrections. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. UNIV ESTADUAL RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL. COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,SK-84215 BRATISLAVA,SLOVAKIA. UNIV STRASBOURG 1,CTR RECH NUCL,CNRS,IN2P3,F-67037 STRASBOURG,FRANCE. COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. CAS,FZU,INST PHYS,DIV HIGH ENERGY PHYS,PRAGUE 18040 8,CZECH REPUBLIC. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,INST SCI NUCL,IN2P3,CNRS,F-38026 ST MARTIN DHERES,FRANCE. RES INST HIGH ENERGY PHYS,SEFT,FIN-00014 HELSINKI,FINLAND. JOINT INST NUCL RES,MOSCOW 101000,RUSSIA. UNIV KARLSRUHE,INST EXPT KERNPHYS,D-76128 KARLSRUHE,GERMANY. INST NUCL PHYS,PL-30055 KRAKOW,POLAND. UNIV MIN & MET KRAKOW,PL-30055 KRAKOW,POLAND. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,IN2P3,CNRS,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV PARIS 06,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE. UNIV PARIS 07,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE. LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. CHARLES UNIV,MFF,NUCL CTR,NC,PRAGUE 18000 8,CZECH REPUBLIC. NIKHEF H,NL-1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ZOGRAFOS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OVIEDO,DPTO FIS,OVIEDO 33006,SPAIN. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. CENS,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UC,CSIC,INST FIS CANTABRIA,SANTANDER 39006,SPAIN. INST HIGH ENERGY PHYS,PROTVINO,RUSSIA. UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,LJUBLJANA 61000,SLOVENIA. UNIV STOCKHOLM,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. FED UNIV RIO DE JANEIRO,BR-21945970 RIO JANEIRO,BRAZIL. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. CSIC,IFIC,E-46100 BURJASSOT,VALENCIA,SPAIN. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,VALENCIA,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL,GERMANY. RP Abreu, P (reprint author), INST SUPER TECN,LIP,FCUL,P-1000 LISBON,PORTUGAL. RI Yip, Kin/D-6860-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Navas, Sergio/N-4649-2014; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; Mundim, Luiz/A-1291-2012; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Chudoba, Jiri/G-7737-2014; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Cabrera Urban, Susana/H-1376-2015; Botner, Olga/A-9110-2013; Michelotto, Michele/A-9571-2013; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013 OI PREST, MICHELA/0000-0003-3161-4454; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Smirnova, Oxana/0000-0003-2517-531X; Matteuzzi, Clara/0000-0002-4047-4521; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Sannino, Mario/0000-0001-7700-8383; Maio, Amelia/0000-0001-9099-0009; De Angelis, Alessandro/0000-0002-3288-2517; Yip, Kin/0000-0002-8576-4311; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Navas, Sergio/0000-0003-1688-5758; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368; Mundim, Luiz/0000-0001-9964-7805; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Tome, Bernardo/0000-0002-7564-8392; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Pimenta, Mario/0000-0002-2590-0908; Michelotto, Michele/0000-0001-6644-987X; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; NR 12 TC 4 Z9 4 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. 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Sciulli, F Straub, PB Wai, L Yang, S Zhu, Q Borzemski, P Chwastowski, J Eskreys, A Jakubowski, Z Przybycien, MB Zachara, M Zawiejski, L Adamczyk, L Bednarek, B Jelen, K Kisielewska, D Kowalski, T Przybycien, M RulikowskaZarebska, E Suszycki, L Zajac, J Dulinski, Z Kotanski, A Abbiendi, G Bauerdick, LAT Behrens, U Beier, H Bienlein, JK Cases, G Deppe, O Desler, K Drews, G Flasinski, M Gilkinson, DJ Glasman, C Gottlicher, P GrosseKnetter, J Haas, T Hain, W Hasell, D Hessling, H Iga, Y Johnson, KF Joos, P Kasemann, M Klanner, R Koch, W Kotz, U Kowalski, H Labs, J Ladage, A Lohr, B Lowe, M Luke, D Mainusch, J Manczak, O Milewski, J Monteiro, T Ng, JST Notz, D Ohrenberg, K Piotrzkowski, K Roco, M Rohde, M Roldan, J Schneekloth, U Schulz, W Selonke, F Surrow, B Tassi, E Voss, T Westphal, D Wolf, G Wollmer, U Youngman, C Zeuner, W Grabosch, HJ Kharchilava, A Mari, SM Meyer, A Schlenstedt, S Wulff, N Barbagli, G Gallo, E Pelfer, P Maccarrone, G DePasquale, S Votano, L Bamberger, A Eisenhardt, S Trefzger, T Wolfle, S Bromley, JT Brook, NH Bussey, PJ Doyle, AT Saxon, DH Sinclair, LE Utley, ML Wilson, AS Dannemann, A Holm, U Horstmann, D Sinkus, R Wick, K Burow, BD Hagge, L Lohrmann, E Poelz, G Schott, W Zetsche, F Bacon, TC Brummer, N Butterworth, I Harris, VL Howell, G Hung, BHY Lamberti, L Long, KR Miller, DB Pavel, N Prinias, A Sedgbeer, JK Sideris, D Whitfield, AF Mallik, U Wang, MZ Wang, SM Wu, JT Cloth, P Filges, D An, SH Cho, GH Ko, BJ Lee, SB Nam, SW Park, HS Park, SK Kartik, S Kim, HJ McNeil, RR Metcalf, W Nadendla, VK Barreiro, F Fernandez, JP Graciani, R Hernandez, JM Hervas, L Labarga, L Martinez, M delPeso, J Puga, J Terron, J deTroconiz, JF Corriveau, F Hanna, DS Hartmann, J Hung, LW Lim, JN Matthews, CG Patel, PM Riveline, M Stairs, DG StLaurent, M Ullmann, R Zacek, G Tsurugai, T Bashkirov, V Dolgoshein, BA Stifutkin, A Bashindzhagyan, GL Ermolov, PF Gladilin, LK Golubkov, YA Kobrin, VD Korzhavina, IA Kuzmin, VA Lukina, OY Proskuryakov, AS Savin, AA Shcheglova, LM Solomin, AN Zotov, NP Botje, M Chlebana, F Engelen, J deKamps, M Kooijman, P Kruse, A vanSighem, A Tiecke, H Verkerke, W Vossebeld, J Vreeswijk, M Wiggers, L deWolf, E vanWoudenberg, R Acosta, D Bylsma, B Durkin, LS Gilmore, J Li, C Ling, TY Nylander, P Park, IH Romanowski, TA Bailey, DS Cashmore, RJ CooperSarkar, AM Devenish, RCE Harnew, N Lancaster, M Lindemann, L McFall, JD Nath, C Noyes, VA Quadt, A Tickner, JR Uijterwaal, H Walczak, R Waters, DS Wilson, FF Yip, T Bertolin, A Brugnera, R Carlin, R DalCorso, F DeGiorgi, M Dosselli, U Limentani, S Morandin, M Posocco, M Stanco, L Stroili, R Voci, C Zuin, F Bulmahn, J Feild, RG Oh, BY Whitmore, JJ DAgostini, G Marini, G Nigro, A Hart, JC McCubbin, NA Shah, TP Barberis, E Dubbs, T Heusch, C VanHook, M Lockman, W Rahn, JT Sadrozinski, HFW Seiden, A Williams, DC Biltzinger, J Seifert, RJ Schwarzer, O Walenta, AH Abramowicz, H Briskin, G Dagan, S Levy, A Fleck, JI Inuzuka, M Ishii, T Kuze, M Mine, S Nakao, M Suzuki, I Tokushuku, K Umemori, K Yamada, S Yamazaki, Y Chiba, M Hamatsu, R Hirose, T Homma, K Kitamura, S Matsushita, T Yamauchi, K Cirio, R Costa, M Ferrero, MI Maselli, S Peroni, C Sacchi, R Solano, A Staiano, A Dardo, M Bailey, DC Benard, F Brkic, M Fagerstroem, CP Hartner, GF Joo, KK Levman, GM Martin, JF Orr, RS Polenz, S Sampson, CR Simmons, D Teuscher, RJ Butterworth, JM Catterall, CD Jones, TW Kaziewicz, PB Lane, JB Saunders, RL Shulman, J Sutton, MR Lu, B Mo, LW Bogusz, W Ciborowski, J Gajewski, J Grzelak, G Kasprzak, M Krzyzanowski, M Muchorowski, K Nowak, RJ Pawlak, JM Tymieniecka, T Wroblewski, AK Zakrzewski, JA Zarnecki, AF Adamus, M Coldewey, C Eisenberg, Y Hochman, D Karshon, U Revel, D ZerZion, D Badgett, WF Breitweg, J Chapin, D CRoss, R Dasu, S Foudas, C Loveless, RJ Mattingly, S Reeder, DD Silverstein, S Smith, WH Vaiciulis, A Wodarczyk, M Bhadra, S Cardy, ML Frisken, WR Khakzad, M Murray, WN Schmidke, WB TI Study of charged-current ep interactions at Q(2)>200 GeV2 with the ZEUS detector at HERA SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID DEEP-INELASTIC SCATTERING; LARGE RAPIDITY GAP; CENTRAL TRACKING DETECTOR; W-BOSON MASS; PARTON DISTRIBUTIONS; ANTINEUTRINO REACTIONS; BARREL CALORIMETER; CROSS-SECTIONS; JET PRODUCTION; HIGH Q(2) AB Deep inelastic charged-current reactions have been studied in e(+)p and e(-)p collisions at a center of mass energy of about 300 GeV in the kinematic region Q(2)>200 GeV2 and x>0.006 using the ZEUS detector at HERA, The integrated cross sections for Q(2)>200 GeV2 are found to be sigma(e+p--><(upsilon)over bar X>)=30.3(-4.2 -2.6)(+5.5 +1.6) pb and sigma(e-p-->upsilon X)=54.7(-9.8 -3.4)(+15.9 +2.8) pb. Differential cross sections have been measures as functions of the variables x, y and Q(2). From the measured differential cross sections d sigma/dQ(2), the W boson mass is determined to be M(W)=79(-7 -4)(+8 +4) GeV. Measured jet rates and transverse energy profiles agree with model predictions, A search for charged-current interactions with a large rapidity gap yielded one candidate event, corresponding to a cross section of sigma(e+p--><(upsilon)over bar X>)(Q(2)>200 GeV2; eta(max)<2.5)=0.8(-0.7)(+1.8)+/-0.1 pb. C1 ANDREWS UNIV, BERRIEN SPRINGS, MI 49104 USA. 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. COLUMBIA UNIV, NEVIS LABS, IRVINGTON, NY USA. INST PHYS NUCL, KRAKOW, POLAND. ACAD MIN & MET, FAC PHYS & NUCL TECHNIQUES, KRAKOW, POLAND. JAGIELLONIAN UNIV, DEPT PHYS, KRAKOW, POLAND. DESY, D-2000 HAMBURG, GERMANY. DESY, IFH ZEUTHEN, ZEUTHEN, GERMANY. UNIV FLORENCE, FLORENCE, ITALY. IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, 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 2, HAMBURG, GERMANY. UNIV HAMBURG, INST EXPT PHYS 1, HAMBURG, GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, HIGH ENERGY NUCL PHYS GRP, LONDON, ENGLAND. UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA USA. FORSCHUNGSZENTRUM JULICH, INST KERNPHYS, JULICH, GERMANY. KOREA UNIV, SEOUL 136701, SOUTH KOREA. LOUISIANA STATE UNIV, DEPT PHYS & ASTRON, BATON ROUGE, LA 70803 USA. UNIV AUTONOMA MADRID, DEPT FIS TEOR, MADRID, SPAIN. MCGILL UNIV, DEPT PHYS, MONTREAL, PQ, CANADA. MEIJI GAKUIN UNIV, FAC GEN EDUC, YOKOHAMA, KANAGAWA, JAPAN. MOSCOW ENGN PHYS INST, MOSCOW 115409, RUSSIA. MOSCOW MV LOMONOSOV STATE UNIV, INST PHYS NUCL, MOSCOW, RUSSIA. NIKHEF H, NL-1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, AMSTERDAM, NETHERLANDS. OHIO STATE UNIV, DEPT PHYS, COLUMBUS, MS 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. UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY. IST NAZL FIS NUCL, ROME, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, D-5900 SIEGEN, GERMANY. TEL AVIV UNIV, SCH PHYS, IL-69978 TEL AVIV, ISRAEL. TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO, JAPAN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV TURIN, FAC SCI 2, ALESSANDRIA, ITALY. IST NAZL FIS NUCL, ALESSANDRIA, ITALY. UNIV TORONTO, DEPT PHYS, TORONTO, ON, CANADA. UCL, DEPT PHYS & ASTRON, LONDON, ENGLAND. VIRGINIA POLYTECH INST & STATE UNIV, BLACKSBURG, VA 24061 USA. UNIV WARSAW, INST EXPT PHYS, WARSAW, POLAND. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. WEIZMANN INST SCI, DEPT NUCL PHYS, IL-76100 REHOVOT, ISRAEL. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. YORK UNIV, DEPT PHYS, N YORK, ON M3J 1P3, CANADA. CNR, IROE, I-50127 FLORENCE, ITALY. UNIV TURIN, TURIN, ITALY. UNIV HAMBURG, HAMBURG, GERMANY. RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Bashkirov, Vladimir/A-4818-2008; Morandin, Mauro/A-3308-2016; De Pasquale, Salvatore/B-9165-2008; Lancaster, Mark/C-1693-2008; Doyle, Anthony/C-5889-2009; Golubkov, Yury/E-1643-2012; Proskuryakov, Alexander/J-6166-2012; Katz, Uli/E-1925-2013; Wiggers, Leo/B-5218-2015; Hernandez Calama, Jose Maria/H-9127-2015; Tassi, Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; Solomin, Anatoly/C-3072-2016; Graciani Diaz, Ricardo/I-5152-2016; Capua, Marcella/A-8549-2015; OI Morandin, Mauro/0000-0003-4708-4240; De Pasquale, Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195; Katz, Uli/0000-0002-7063-4418; Wiggers, Leo/0000-0003-1060-0520; Hernandez Calama, Jose Maria/0000-0001-6436-7547; Gladilin, Leonid/0000-0001-9422-8636; Graciani Diaz, Ricardo/0000-0001-7166-5198; Castellini, Guido/0000-0002-0177-0643; Capua, Marcella/0000-0002-2443-6525; Lancaster, Mark/0000-0002-8872-7292 NR 63 TC 32 Z9 32 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD SEP PY 1996 VL 72 IS 1 BP 47 EP 64 DI 10.1007/s002880050222 PG 18 WC Physics, Particles & Fields SC Physics GA VV931 UT WOS:A1996VV93100005 ER PT J AU BarShalom, S Atwood, D Eilam, G Soni, A AF BarShalom, S Atwood, D Eilam, G Soni, A TI CP nonconservation in e(+) e(-)->t(t)over-barg SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID QUARK PAIR PRODUCTION; TOP-QUARK; WEINBERG MODEL; E+E COLLIDERS; HIGGS-BOSON; VIOLATION; DECAYS; SUPERCOLLIDERS; POLARIZATION; ASYMMETRIES AB CP violation effects in e(+)e(-) --> t(t) over barg$ are exam ined. CP-odd, T-N-odd and T-N-even observables can both be used to extract information on the real and imaginary parts of Feynman amplitudes. The two Higgs doubler model with CP violating phase from neutral Higgs exchange is used to illustrate possible effects. In this particular model the expected luminosity of the future colliders seems to fall short by about one order of magnitude to detect such asymmetries. C1 SLAC,STANFORD,CA 94305. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP BarShalom, S (reprint author), TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL. NR 37 TC 5 Z9 5 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD SEP PY 1996 VL 72 IS 1 BP 79 EP 86 DI 10.1007/s002880050225 PG 8 WC Physics, Particles & Fields SC Physics GA VV931 UT WOS:A1996VV93100008 ER PT J AU Chu, CS Ho, PM Zumino, B AF Chu, CS Ho, PM Zumino, B TI Geometry of the quantum complex projective space CPq(N) SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article AB The quantum deformation CPq(N) of complex projective space is discussed. Many of the features present in the case of the quantum sphere can be extended. The differential and integral calculus is studied and CPq(N) appears as a quantum Kahler manifold. The braiding of several copies of CPq(N) is introduced and the anharmonic ratios of four collinear points are shown to be invariant under quantum projective transformations. They provide the building blocks of all projective invariants. The Poisson limit is also described. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP Chu, CS (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Chu, chong-sun/J-8842-2012; OI Ho, Pei-Ming/0000-0002-0466-0351 NR 11 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD SEP PY 1996 VL 72 IS 1 BP 163 EP 170 DI 10.1007/s002880050233 PG 8 WC Physics, Particles & Fields SC Physics GA VV931 UT WOS:A1996VV93100016 ER PT J AU Kimura, M Dillon, MA Buenker, RJ Hirsch, G Li, Y Chantranupong, L AF Kimura, M Dillon, MA Buenker, RJ Hirsch, G Li, Y Chantranupong, L TI The effect of variable electronic transition moment on the EELS intensity distribution within a vibrational progression: Use of the R-centroid approximation to analyze results for the CO B-X and O2B'-X transitions SO ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS LA English DT Article ID GENERALIZED OSCILLATOR-STRENGTHS; CONFIGURATION-INTERACTION; RYDBERG STATES; AB-INITIO; O2; MOLECULE; VALENCE AB The CO B-X and O-2 B'-X transitions are analyzed with the help of ab initio MRD-Cl calculations. In both cases a violation of a well-known rule in electron energy loss spectra (EELS) is observed, namely that the intensity distribution of vibrational bands is normally independent of both the scattering angle and the incident electron energy. In both cases strongly avoided crossings are shown to be responsible for the unusual appearance of the EELS. The analysis is simplified by making use of the R-centroid approximation, which was originally developed to organize and systematize optical absorption and emission data. It is concluded that a breakdown of the intensity distribution invariance in EELS should occur for a wide class of transitions in which avoided crossings lead to rapid variations in the electronic transition moment as a function of internuclear separation. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH 9,D-42097 WUPPERTAL,GERMANY. RIKEN,INST PHYS & CHEM RES,WAKO,SAITAMA 35101,JAPAN. RP Kimura, M (reprint author), YAMAGUCHI UNIV,DEPT APPL SCI,UBE,YAMAGUCHI 755,JAPAN. NR 21 TC 5 Z9 5 U1 0 U2 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7683 J9 Z PHYS D ATOM MOL CL JI Z. Phys. D-Atoms Mol. Clusters PD SEP PY 1996 VL 38 IS 2 BP 165 EP 169 PG 5 WC Physics, Atomic, Molecular & Chemical SC Physics GA VH764 UT WOS:A1996VH76400009 ER PT J AU Paulsen, MD Straatsma, TP AF Paulsen, MD Straatsma, TP TI Chlorinated ethanes in aqueous solution: Parameterization based on thermodynamics of hydration SO CHEMICAL PHYSICS LETTERS LA English DT Article ID FREE-ENERGY CALCULATIONS; MOLECULAR-DYNAMICS; ORGANIC SOLUTES; NUCLEIC-ACIDS; FORCE-FIELD; INTEGRATION; SIMULATIONS; PROTEINS; PROGRAM AB Lennard-Jones parameters for short chain alkanes and chloroethanes were optimized in order to reproduce experimental absolute hydration free energy data. Absolute solvation free energies were calculated using the recently developed separation shifted scaling method in conjunction with thermodynamic integration calculations. Coefficients for the repulsive interaction of carbon, hydrogen, and chlorine with SPC/E water were optimized in order to simultaneously improve the agreement between calculated and experimental absolute hydration free energies for both unsubstituted short chain alkanes and chloroethanes. However, the optimized parameters resulted in substantially poorer agreement for pure liquid densities of chloroethanes. RP Paulsen, MD (reprint author), PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 16 TC 2 Z9 2 U1 0 U2 0 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 AUG 30 PY 1996 VL 259 IS 1-2 BP 142 EP 145 DI 10.1016/0009-2614(96)00729-4 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VE448 UT WOS:A1996VE44800020 ER PT J AU Warren, WL Kanicki, J Poindexter, EH AF Warren, WL Kanicki, J Poindexter, EH TI Paramagnetic point defects in silicon nitride and silicon oxynitride thin films on silicon SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS LA English DT Article; Proceedings Paper CT VII International Symposium on Magnetic Resonance in Colloid and Interface Science (ISMRCIS VII) CY SEP 11-15, 1996 CL MADRID, SPAIN DE paramagnetic point defects; silicon; silicon nitride thin film; silicon oxynitride thin film ID DANGLING-BOND CENTERS; HYDROGENATED AMORPHOUS-SILICON; STRUCTURAL IDENTIFICATION; DIOXIDE; STATES AB Silicon nitride and silicon oxynitride thin films on silicon often contain paramagnetic point defects. In the nitride, major defects are the K-0 center (Si-.=N-3) and the N-2(0) center (N-.=Si-2), with possibly an NN20 center (Si-N-.-N=Si-2). In the dark, the K center normally exists as nonparamagnetic K- and K+. It may be (temporarily) put into the K-0 state by UV excitation. The behavior of K-0 is consistent with a model in which the two-electron state is more stable than the single-electron state; other explanations are possible. A change in composition from Si-rich to N-rich SixNy reduces [K-0] and, due to the wider bandgap, allows the singly-occupied N-2(0) state to emerge from the valence band E(s)' (Si-.=O-3) and E(gamma)' (O-3=Si+...Si-.=O-3); and a tentatively-assigned nitroxide-like N-x center. Since most oxynitride defects contain either N or O, but not both, a multiphase material is suggested. C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. USN, RES LAB, FT MONMOUTH, NJ 07703 USA. RI Kanicki, Jerzy/E-2753-2016 OI Kanicki, Jerzy/0000-0002-3649-8360 NR 29 TC 7 Z9 7 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-7757 J9 COLLOID SURFACE A JI Colloid Surf. A-Physicochem. Eng. Asp. PD AUG 30 PY 1996 VL 115 BP 311 EP 317 DI 10.1016/0927-7757(96)03595-9 PG 7 WC Chemistry, Physical SC Chemistry GA VG193 UT WOS:A1996VG19300037 ER PT J AU Liu, CT Tortorelli, PF Horton, JA Carmichael, CA AF Liu, CT Tortorelli, PF Horton, JA Carmichael, CA TI Effects of alloy additions on the microstructure and properties of Cr-Cr2Nb alloys SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE alloy addition; Cr-Cr2Nb alloys; microstructure; mechanical properties ID REACTIVE ELEMENTS; LAVES PHASES; COMPOSITES; OXIDATION AB Alloying additions of Ni, Co, Fe, Al and Re at levels up to 16 at.% were added to Cr-Cr2Nb alloys containing 5.6-17 at.% Nb for the study of their microstructure, oxidation behavior, and mechanical properties. These alloys contain patches of primary Cr-rich solid solution surrounded by the eutectic structure having Cr2Nb and Cr(similar to 6% Nb) phases. The supersaturated Cr-rich solid solution in the cast alloys precipitated out secondary Cr2Nb (Laves-phase) particles upon annealing at and above 900 degrees C. The studies by TEM and electron microprobe analysis indicated that the transition elements of Fe, Co, and Ni partition strongly in the Cr2Nb-type Laves phase whereas rhenium and aluminum were only moderately enriched in the Laves phase. The Cr-Cr2Nb alloys with less than or equal to 12% Nb exhibited considerable plastic deformation under compression tests. The yield strength of the alloys depended strongly on the volume fraction of the hard Laves phase. The oxidation resistance also increased with this volume fraction. Among the alloying additions, rhenium was the only element that substantially hardened the Cr-Cr2Nb alloys al room temperature and 1000 degrees C. The hardening behavior is discussed in terms of partitioning and sublattice occupation of the alloying elements as well as altering the volume fracture of the hard Laves phase. Multilayer oxide products formed on these alloys upon exposure to air of an elevated temperature. Little beneficial effect of any of the alloying additions on oxidation behavior at 950 degrees C was found. RP Liu, CT (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. RI Tortorelli, Peter/E-2433-2011; OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 35 TC 55 Z9 70 U1 3 U2 7 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 30 PY 1996 VL 214 IS 1-2 BP 23 EP 32 DI 10.1016/0921-5093(96)10197-0 PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA VH129 UT WOS:A1996VH12900003 ER PT J AU Shkrob, IA Trifunac, AD AF Shkrob, IA Trifunac, AD TI Electron transfer reactions and mobile holes in radiolysis of squalane. Time-resolved FDMR study SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID DETECTED MAGNETIC-RESONANCE; PULSE-RADIOLYSIS; HYDROCARBON SOLUTIONS; ION-PAIRS; FLUORESCENCE; CYCLOHEXANE; ALKANE; DYNAMICS; PHASE AB Fluorescence detected magnetic resonance (FDMR) is applied to study ion-molecule reactions in squalane (2,6,10,15,19,23-hexamethyltetracosane). Several time-resolved pulsed FDMR experiments are suggested to measure rate constants of scavenging by aromatic solutes. These constants vary from 5 x 10(8) to 1.6 x 10(9) mol(-1) dm(3) s(-1). The ion-molecule reactions of radical cations are somewhat slower than reactions of radical anions. The scavenging of the alkane hole is significantly faster than ion-molecule reactions of molecular cations. The mobile hole decays on a time scale of several tens of nanoseconds. These FDMR results are in accord with our recent work on transient absorption spectroscopy in radiolysis of squalane. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 27 TC 4 Z9 4 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 29 PY 1996 VL 100 IS 35 BP 14681 EP 14687 DI 10.1021/jp9532475 PG 7 WC Chemistry, Physical SC Chemistry GA VE373 UT WOS:A1996VE37300020 ER PT J AU Adzic, RR Wang, JX Magnussen, OM Ocko, BM AF Adzic, RR Wang, JX Magnussen, OM Ocko, BM TI Structure of Tl adlayers on the Pt(111) electrode surface: Effects of solution pH and bisulfate coadsorption SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID X-RAY-SCATTERING; SCANNING-TUNNELING-MICROSCOPY; CU UNDERPOTENTIAL DEPOSITION; AU(111) ELECTRODE; ATOMIC-STRUCTURE; ANION ADSORPTION; METAL ADATOMS; COPPER; GOLD; ELECTROCHEMISTRY AB The structure of Tl adlayers deposited at underpotentials on Pt(lll) has been investigated in four different electrolyte solutions (HClO4, NaClO4, NaOH, and H2SO4) With surface X-ray scattering (SXS) techniques. In all solutions investigated, Tl forms an incommensurate, aligned-hexagonal phase at the most negative potentials prior to its bulk deposition or hydrogen evolution. With decreasing potential the monolayer compresses and thus the Tl coverage increases. Under hydrogen evolution, the close-packed hexagonal Tl monolayer also exists and this reaction causes a slight lowering of the Tl coverage and a significant decrease of the in-plane ordering of the monolayer, In sulfuric acid solution, besides the close-packed hexagonal phase, a commensurate (root 3 x root 3)R30 degrees phase with a Tl coverage of 1/3 monolayer is formed in coadsorption with bisulfates over a 0.22 V wide potential range. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP Adzic, RR (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV CHEM SCI,UPTON,NY 11973, USA. RI Wang, Jia/B-6346-2011 NR 31 TC 19 Z9 20 U1 1 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 29 PY 1996 VL 100 IS 35 BP 14721 EP 14725 DI 10.1021/jp960030h PG 5 WC Chemistry, Physical SC Chemistry GA VE373 UT WOS:A1996VE37300025 ER PT J AU Magni, E Somorjai, GA AF Magni, E Somorjai, GA TI Electron irradiation induced chemical vapor deposition of titanium chloride on gold and on magnesium chloride thin films. Surface characterization by AES, XPS, and TPD SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MEAN FREE PATHS; 50-2000-EV RANGE AB The electron irradiation induced TiCl4 deposition on a gold polycrystalline foil and on a Au (100) single crystal in ultra-high vacuum conditions is reported. Titanium chloride ultrathin films are prepared at 250-300 K by irradiation of the substrate with 1 keV electrons in a background pressure of TiCl4 of 1 x 10(-8) to 5 x 10(-7) Torr. The deposited films are characterized by AES, XPS, and temperature-programmed desorption (TPD). We can grow titanium chloride films of the maximum thickness of about 25 Angstrom under our experimental conditions. The film consists of 3-4 layers of TiCl2 with 1 monolayer of TICl4 chemisorbed on its surface. A comparison is made with the titanium chloride film grown on MgCl2 ultrathin films by electron irradiation induced TiCl4 deposition as previously reported. This film is very similar to the titanium chloride film deposited on Au and can be described as few layers of TiCl2 deposited on a defective MgCl2-x film. One monolayer of TiCl4 is chemisorbed on the TiCl2 surface. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 24 TC 39 Z9 39 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 29 PY 1996 VL 100 IS 35 BP 14786 EP 14793 DI 10.1021/jp960941r PG 8 WC Chemistry, Physical SC Chemistry GA VE373 UT WOS:A1996VE37300033 ER PT J AU Hong, M Pines, A Caldarelli, S AF Hong, M Pines, A Caldarelli, S TI Measurement and assignment of long-range C-H dipolar couplings in liquid crystals by two-dimensional NMR spectroscopy SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID C-13 NMR; MAGIC-ANGLE; FIELD; ORIENTATION; MOLECULES; CONSTANTS; SOLIDS; SHAPE AB We describe multidimensional NMR techniques to measure and assign C-13-H-1 dipolar couplings in nematic liquid crystals with high resolution. In particular, dipolar couplings between aromatic and aliphatic sites are extracted, providing valuable information on the structural correlations between these two components of thermotropic liquid crystal molecules. The NMR techniques are demonstrated on 4-pentyl-4'-biphenylcarbonitrile (5CB), a well-characterized room-temperature nematic liquid crystal. Proton-detected local-field NMR spectroscopy is employed to obtain highly resolved C-H dipolar couplings that are separated according to the chemical shifts of the carbon sites. Each C-13 cross section in the 2D spectra exhibits several doublet splittings, with the largest one resulting from the directly bonded C-H coupling, The smaller splittings originate from the long-range C-H dipolar couplings and can be assigned qualitatively by a chemical shift heteronuclear correlation (HETCOR) experiment. The HETCOR experiment incorporates a mixing period for proton spin diffusion to occur, so that maximal polarization transfer can be achieved between the unbonded C-13 and H-1 nuclei. To assign the long-range C-H couplings quantitatively, we combined these two techniques into a novel reduced-3D experiment, in which the H-1 chemical shift-displaced C-H dipolar couplings are correlated with the C-13 chemical shifts. The time domain of this experiment involves separate but synchronous incrementation of the evolution periods for the C-H dipolar couplings and the H-1 chemical shifts, with a variable ratio of the respective dwell times to optimize the resolution and facilitate resonance assignment in the spectrum. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV LAUSANNE,BCH DORIGNY,CHIM SECT,CH-1015 LAUSANNE,SWITZERLAND. RI Caldarelli, Stefano/B-2750-2017 OI Caldarelli, Stefano/0000-0001-9008-9392 NR 22 TC 45 Z9 45 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 29 PY 1996 VL 100 IS 35 BP 14815 EP 14822 DI 10.1021/jp960972m PG 8 WC Chemistry, Physical SC Chemistry GA VE373 UT WOS:A1996VE37300036 ER PT J AU Schilling, A Fisher, RA Phillips, NE Welp, U Dasgupta, D Kwok, WK Crabtree, GW AF Schilling, A Fisher, RA Phillips, NE Welp, U Dasgupta, D Kwok, WK Crabtree, GW TI Calorimetric measurement of the latent heat of vortex-lattice melting in untwinned YBa2Cu3O7-delta SO NATURE LA English DT Article ID SINGLE-CRYSTALS; TRANSITION; SUPERCONDUCTORS; DISORDER AB THE magnetic vortex lattice of copper oxide superconductors in the mixed (field-penetrated) state 'liquefies'(1,2) on increasing the temperature T or the external magnetic field H, giving rise to an ohmic resistivity well below the fluctuation-dominated crossover to the normal state at the upper critical field H-c2(T), Theoretical work suggests that in clean materials this melting is a first-order phase transition(3); features in the resistivity(4-6) and magnetization(7-10), as well as results from muon spin rotation(11) and neutron-diffraction work(12), have been cited to support this hypothesis, A calorimetric measurement of a latent heat provides the most definitive proof of the occurrence of a first-order transition, but such measurements require very high sensitivity, Here we report calorimetric measurements on an untwinned single crystal of YBa2Cu3O7-delta that have sufficient precision to clearly resolve the latent heat. The value obtained, similar to 0.45 k(B)T per vortex per superconducting layer (where k(B) is the Boltzmann constant), is consistent with that inferred from magnetization data using the Clapeyron equation, This result is compelling evidence for a first-order transition at a well defined phase boundary H-m(T). C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Schilling, A (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BG4 GIAUQUE,BERKELEY,CA 94720, USA. NR 16 TC 314 Z9 315 U1 0 U2 8 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD AUG 29 PY 1996 VL 382 IS 6594 BP 791 EP 793 DI 10.1038/382791a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VE347 UT WOS:A1996VE34700040 ER PT J AU LaRoche, J Boyd, PW McKay, RML Geider, RJ AF LaRoche, J Boyd, PW McKay, RML Geider, RJ TI Flavodoxin as an in situ marker for iron stress in phytoplankton SO NATURE LA English DT Article ID EQUATORIAL PACIFIC-OCEAN; SUB-ARCTIC PACIFIC; LIMITATION; PROTEINS; PHOTOSYNTHESIS; NUTRIENT; SEA AB A fundamental issue in marine science is the identification of the factors controlling biological uptake of CO2 in high nitrate, low-chlorophyll regions(1-10). A recent in situ iron fertilization experiment demonstrated that iron limitation is responsible for low phytoplankton stocks in the equatorial Pacific(4), Here we show that flavodoxin, a biochemical marker of iron limitation, can be used to map the degree of iron stress in natural populations. Flavodoxin assays along a 900-km east-west transect in the northeastern subarctic Pacific revealed a pronounced increase in iron stress in the region west of the 135 degrees W meridian. Addition of dissolved iron alleviated this stress. Immunostaining of single cells from the most western station showed that flavodoxin is present specifically within the chloroplasts of diatoms. Our approach provides a rapid means of defining the extent of iron stress in the ocean(5) and supports the hypothesis that diatoms are iron stressed in the northeast Pacific(6,10). C1 UNIV BRITISH COLUMBIA, DEPT OCEANOG, VANCOUVER, BC V6T 1Z4, CANADA. UNIV DELAWARE, COLL MARINE STUDIES, LEWES, DE 19958 USA. MARINE BIOL ASSOC UNITED KINGDOM, PLYMOUTH MARINE LAB, PLYMOUTH PL1 2PB, DEVON, ENGLAND. RP LaRoche, J (reprint author), BROOKHAVEN NATL LAB, DIV OCEANOG & ATMOSPHER SCI, UPTON, NY 11973 USA. RI LaRoche, Julie/A-1109-2010; Boyd, Philip/J-7624-2014; OI Boyd, Philip/0000-0001-7850-1911; McKay, Robert/0000-0003-2723-5371 NR 28 TC 173 Z9 176 U1 1 U2 28 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 29 PY 1996 VL 382 IS 6594 BP 802 EP 805 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VE347 UT WOS:A1996VE34700044 ER PT J AU Arbuzov, A Bigi, M Burkhardt, H Cacciari, M Caffo, M Czyz, H Dallavalle, M Field, JH Filthaut, F Jadach, S Jergerlehner, F Kuraev, E Montagna, G Nicrosini, O Piccinini, F Pietrzyk, B Placzek, W Remiddi, E Skrzypek, M Trentadue, L Ward, BFL Was, Z AF Arbuzov, A Bigi, M Burkhardt, H Cacciari, M Caffo, M Czyz, H Dallavalle, M Field, JH Filthaut, F Jadach, S Jergerlehner, F Kuraev, E Montagna, G Nicrosini, O Piccinini, F Pietrzyk, B Placzek, W Remiddi, E Skrzypek, M Trentadue, L Ward, BFL Was, Z TI The present theoretical error on the Bhabha scattering cross section in the luminometry region at LEP SO PHYSICS LETTERS B LA English DT Article AB The results concerning the theoretical evaluation of the small-angle Bhabha Scattering cross section obtained during the Workshop on Physics at LEP2 (CERN, Geneva, Switzerland, 1995) by the Working Group ''Event Generators for Bhabha Scattering'' are summarized. The estimate of the theoretical error on the cross section in the luminometry region is updated. C1 UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. CERN,DIV SL,CH-1211 GENEVA 23,SWITZERLAND. DESY,D-2000 HAMBURG,GERMANY. UNIV BOLOGNA,DIPARTMENTO FIS,BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. UNIV SILESIA,INST PHYS,KATOWICE,POLAND. UNIV GENEVA,CH-1211 GENEVA,SWITZERLAND. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. INST NUCL PHYS,PL-30055 KRAKOW,POLAND. CERN,DIV TH,CH-1211 GENEVA 23,SWITZERLAND. DESY,ZEUTHEN,GERMANY. ETH ZURICH,ZURICH,SWITZERLAND. UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY. IST NAZL FIS NUCL,I-27100 PAVIA,ITALY. LAB ANNECY LE VIEUX PHYS PARTICULES,IN2P3,CNRS,F-74941 ANNECY LE VIEUX,FRANCE. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. UNIV PARMA,DIPARTIMENTO FIS,I-43100 PARMA,ITALY. IST NAZL FIS NUCL,GRP COLLEGATO PARMA,SEZ MILAN,MILAN,ITALY. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP Arbuzov, A (reprint author), JOINT INST NUCL RES,BLTP,DUBNA 141980,RUSSIA. RI Arbuzov, Andrej/J-6073-2013; OI Arbuzov, Andrej/0000-0001-9326-6905; Filthaut, Frank/0000-0003-3338-2247 NR 1 TC 33 Z9 33 U1 0 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 AUG 29 PY 1996 VL 383 IS 2 BP 238 EP 242 DI 10.1016/0370-2693(96)00733-2 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VE514 UT WOS:A1996VE51400018 ER PT J AU Wang, D Montane, D Chornet, E AF Wang, D Montane, D Chornet, E TI Catalytic steam reforming of biomass-derived oxygenates: Acetic acid and hydroxyacetaldehyde SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE acetic acid; hydroxyacetaldehyde; hydrogen; steam reforming; thermal decomposition; oxygen-containing compounds; biomass-derived oxygenates; mechanisms; molecular beam mass spectrometry ID COPPER-BASED CATALYSTS; HYDROGEN-PRODUCTION; SURFACE-CHEMISTRY; THERMAL-DECOMPOSITION; NICKEL-ALUMINA; FAST PYROLYSIS; METHANOL; KETENE; GASIFICATION; ETHANOL AB Biomass can be pyrolytically converted in high yields (similar to 70 wt.%) into vapors (or oils when condensed) composed mainly of oxygenated organic compounds. Using a fixed-bed microreactor interfaced with a molecular beam mass spectrometer (MBMS), we have been studying the catalytic steam reforming of model oxygen-containing compounds present in biomass pyrolysis vapors. This MBMS sampling system is unique in its rapid, real-time, and universal detection of gaseous and condensible products. In this paper, we present results for steam reforming of acetic acid (HAc) and hydroxyacetaldehyde (HAA), two major products derived from the pyrolysis of carbohydrates in biomass. We propose mechanisms to couple the thermal decomposition and steam reforming reactions of these compounds. Both HAc and HAA undergo rapid thermal decomposition; complete steam reforming of these two model compounds can be achieved with commercial Ni-based catalysts. HAc forms coke on the catalyst surface, which is subsequently gasified by steam. The proposed mechanism for this coke formation involves an adsorbed acetate species that decarboxylates to form the coke precursor, (CH1-3)(abs), and also ketene, a dehydration product of HAc, that decomposes to form (CH1,2)(abs). The reforming of HAA by steam does not involve any detectable intermediate and proceeds smoothly to a complete breakdown to CO and H-2 on the catalyst surface. C1 UNIV SHERBROOKE,SHERBROOKE,PQ J1K 2R1,CANADA. RP Wang, D (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. RI Montane, Daniel/K-9172-2014 OI Montane, Daniel/0000-0002-5273-8870 NR 60 TC 150 Z9 162 U1 5 U2 33 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD AUG 28 PY 1996 VL 143 IS 2 BP 245 EP 270 DI 10.1016/0926-860X(96)00093-2 PG 26 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA VE431 UT WOS:A1996VE43100005 ER PT J AU Renner, MW Barkigia, KM Melamed, D Smith, KM Fajer, J AF Renner, MW Barkigia, KM Melamed, D Smith, KM Fajer, J TI Ligand-bridged heterobimetallic polymers: Silver(I)-benzothiadiazole-nickel porphyrin cation-benzothiadiazole arrays SO INORGANIC CHEMISTRY LA English DT Article ID ELECTRON-TRANSFER; COMPLEXES; CATALYSTS; OXIDATION; CHEMISTRY; NICKEL C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. UNIV CALIF DAVIS,DEPT CHEM,DAVIS,CA 95616. RI Smith, Kevin/G-1453-2011 OI Smith, Kevin/0000-0002-6736-4779 NR 27 TC 37 Z9 38 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 28 PY 1996 VL 35 IS 18 BP 5120 EP 5121 DI 10.1021/ic960673b PG 2 WC Chemistry, Inorganic & Nuclear SC Chemistry GA VE439 UT WOS:A1996VE43900007 ER PT J AU Bakac, A Butkovic, V Espenson, JH Lovric, J Orhanovic, M AF Bakac, A Butkovic, V Espenson, JH Lovric, J Orhanovic, M TI Electron transfer from aliphatic radicals to ring-substituted pyridine N-oxides and their cobalt-ammine complexes in aqueous solution SO INORGANIC CHEMISTRY LA English DT Article ID 1-HYDROXY-1-METHYLETHYL RADICALS; 2-HYDROXY-2-PROPYL RADICALS; KINETICS; REDUCTION; IONS; SERIES; MECHANISM AB The reduction of pyridine N-oxides by 1-hydroxy-1-methylethyl radicals,(.)CMe(2)OH, is acid-dependent, in accord with the greater reducibility of protonated pyridine N-oxides. The respective rate constants for the unprotonated (k(RO)) and protonated (k(R1)) pyridine N-oxides have the following values (L mol(-1) s(-1)): 8.1 x 10(7) and 2.8 x 10(9) (X=4-CN), 7.5 x 10(6) and 3.7 x 10(8) (4-Cl), 7.8 x 10(6) and 8.4 x 10(7) (H), and 1.7 x 10(6) and 4.1 x 10(7) (4-Me). The reduction of the Co(III) complexes (NH3)(5)Co(X-pyO)(3+) by (.)CMe(2)OH is rapid (k=10(7)-10(8) L mol(-1) s(-1)) and acid-independent. On the basis of linear free energy relationships it is concluded that the reduction of the Co(III) complexes takes place by a chemical mechanism, whereby (.)CMe(2)OH reduces the coordinated X-pyO followed by an intramolecular electron transfer to the cobalt center. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RUDJER BOSKOVIC INST,ZAGREB 10000,CROATIA. RP Bakac, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 21 TC 6 Z9 6 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 28 PY 1996 VL 35 IS 18 BP 5168 EP 5172 DI 10.1021/ic960111s PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA VE439 UT WOS:A1996VE43900015 ER PT J AU Kleinke, H Franzen, HF AF Kleinke, H Franzen, HF TI Zr9Co2P4 and Zr9Ni2P4: A new 3D structure type, consisting of edge- and vertex-condensed Zr-6 octahedra SO INORGANIC CHEMISTRY LA English DT Article ID CRYSTAL-STRUCTURE; HIGH-TEMPERATURES; METAL; CLUSTERS; PHASES; SYSTEM AB The isostructural title compounds were synthesized by are-melting of stoichiometric ratios of ZrP, Zr, and Co and Ni, respectively, and subsequent annealing at 1450 degrees C. Their crystal structure (space group P4/mbm; Zr9Co2P4, a = 12.1200(6) Angstrom, c = 3.6158(4) Angstrom, V = 531.37(7) Angstrom(3), Z = 2; Zr9Ni2P4, a = 12.0862(2) Angstrom, c = 3.6435(3) Angstrom, V = 532.23(5) Angstrom(3), Z = 2) is derived from a three-dimensional network of Zr-6 octahedra. These octahedra are connected via common vertices to form chains parallel to the c axis and via common edges and vertices in the ab plane, resulting in one double chain and one single chain. Both kinds of the interstitial atoms, the iron-group-metal atom and the phosphorus, are situated in trigonal prismatic holes between these chains, forming short M-P and M-M' bonds. These octahedra can be described as being of the M(6)X(8) cluster type as is also observed in the chalcogenide Chevrel phases. Due to the electronically nonsaturated character of the Zr octahedra and their three-dimensional connectivity, three-dimensional metallic properties are expected for both phosphides, and metallic behavior is confirmed by the observation of Pauli paramagnetism fur both compounds. C1 IOWA STATE UNIV,AMES LAB,US DOE,AMES,IA 50011. NR 43 TC 22 Z9 22 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 28 PY 1996 VL 35 IS 18 BP 5272 EP 5277 DI 10.1021/ic960214a PG 6 WC Chemistry, Inorganic & Nuclear SC Chemistry GA VE439 UT WOS:A1996VE43900028 ER PT J AU Debreczeny, MP Svec, WA Marsh, EM Wasielewski, MR AF Debreczeny, MP Svec, WA Marsh, EM Wasielewski, MR TI Femtosecond optical control of charge shift within electron donor-acceptor arrays: An approach to molecular switches SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID WIRES C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT CHEM,EVANSTON,IL 60208. NR 26 TC 75 Z9 75 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 28 PY 1996 VL 118 IS 34 BP 8174 EP 8175 DI 10.1021/ja961804a PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VE266 UT WOS:A1996VE26600048 ER PT J AU Tang, IN AF Tang, IN TI Chemical and size effects of hygroscopic aerosols on light scattering coefficients SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article; Proceedings Paper CT International Specialty Conference on Aerosols and Atmospheric Optics - Radiative Balance and Visual Air Quality CY SEP 26-30, 1994 CL SNOWBIRD, UT SP Air & Waste Management Assoc, Amer Geophys Union ID RELATIVE-HUMIDITY; LOS-ANGELES; VISIBILITY; EXTINCTION; SULFATES AB The extensive thermodynamic and optical properties recently reported [Tang and Munkelwitz, 1994a] for sulfate and nitrate solution droplets are incorporated into a visibility model for computing light scattering by hygroscopic aerosols. The following aerosol systems are considered: NH4HSO4, (NH4)(2)SO4, (NH4)(3)H(SO4), NaHSO4, Na2SO4, NH4NO3, and NaNO3. In addition, H2SO4 and NaCl are included to represent freshly formed sulfate and background sea-salt aerosols, respectively. Scattering coefficients, based on 1 mu g dry salt per cubic meter of air, are calculated as a function of relative humidity for aerosols of various chemical compositions and lognormal size distributions. For a given size distribution the light scattered by aerosol particles per unit dry-salt mass concentration is only weakly dependent on chemical constituents of the hygroscopic sulfate and nitrate aerosols. Sulfuric acid and sodium chloride aerosols, however, are exceptions and scatter light more efficiently than all other inorganic salt aerosols considered in this study. Both internal and external mixtures exhibit similar light-scattering properties. Thus for common sulfate and nitrate aerosols, since the chemical effect is outweighed by the size effect, it follows that observed light scattering by the ambient aerosol can be approximated, within practical measurement uncertainties, by assuming the aerosol being an external mixture. This has a definite advantage for either visibility degradation or climatic impact modeling calculations, because relevant data are now available for external mixtures but only very scarce for internal mixtures. RP BROOKHAVEN NATL LAB, DEPT APPL SCI, ENVIRONM CHEM DIV, UPTON, NY 11973 USA. NR 23 TC 324 Z9 335 U1 6 U2 59 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 AUG 27 PY 1996 VL 101 IS D14 BP 19245 EP 19250 DI 10.1029/96JD03003 PG 6 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800027 ER PT J AU Penner, JE Novakov, T AF Penner, JE Novakov, T TI Carbonaceous particles in the atmosphere - Preface SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Editorial Material C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY NATL LAB, BERKELEY, CA 94720 USA. RP Penner, JE (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RI Penner, Joyce/J-1719-2012 NR 0 TC 0 Z9 0 U1 1 U2 2 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 AUG 27 PY 1996 VL 101 IS D14 BP 19371 EP 19371 DI 10.1029/96JD01861 PG 1 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800038 ER PT J AU Penner, JE Novakov, T AF Penner, JE Novakov, T TI Carbonaceous particles in the atmosphere: A historical perspective to the Fifth International Conference on Carbonaceous Particles in the Atmosphere SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article; Proceedings Paper CT 5th International Conference on Carbonaceous Particles in the Atmosphere CY AUG 23-26, 1994 CL LAWRENCE BERKELEY NATL LAB, BERKELEY, CA SP Lawrence Berkeley Natl Lab, Lawrence Livermore Natl Lab HO LAWRENCE BERKELEY NATL LAB ID CHEMICAL-COMPOSITION; AEROSOL-PARTICLES; ORGANIC AEROSOLS; POLLUTION; SOOT; EXTINCTION; CLOUD; IDENTIFICATION; VISIBILITY; FILTERS C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY NATL LAB, DIV ENERGY & ENVIRONM, BERKELEY, CA 94720 USA. LAWRENCE LIVERMORE NATL LAB, GLOBAL CLIMATE RES DIV, LIVERMORE, CA USA. RI Penner, Joyce/J-1719-2012 NR 64 TC 76 Z9 87 U1 1 U2 7 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 AUG 27 PY 1996 VL 101 IS D14 BP 19373 EP 19378 DI 10.1029/96JD01175 PG 6 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800039 ER PT J AU Liousse, C Penner, JE Chuang, C Walton, JJ Eddleman, H Cachier, H AF Liousse, C Penner, JE Chuang, C Walton, JJ Eddleman, H Cachier, H TI A global three-dimensional model study of carbonaceous aerosols SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article; Proceedings Paper CT 5th International Conference on Carbonaceous Particles in the Atmosphere CY AUG 23-26, 1994 CL LAWRENCE BERKELEY NATL LAB, BERKELEY, CA SP Lawrence Berkeley Natl Lab, Lawrence Livermore Natl Lab HO LAWRENCE BERKELEY NATL LAB ID ATMOSPHERIC PARTICULATE MATTER; LONG-RANGE TRANSPORT; OPTICAL-PROPERTIES; BLACK CARBON; ELEMENTAL CARBON; ORGANIC-CARBON; BETA-PINENE; CHEMICAL-COMPOSITION; 3-DIMENSIONAL MODEL; MARINE ATMOSPHERE AB We have developed detailed emission inventories for the amount of both black and organic carbon particles from biomass burning sources (wood fuel, charcoal. burning, dung, charcoal production, agricultural, savanna and forest fires). We have also estimated an inventory for organic carbon particles from fossil fuel burning and urban activities from an existing inventory for fossil fuel sources of black carbon, We also provide an estimate for the natural source of organic matter. These emissions have been used together with our global aerosol model to study the global distribution of carbonaceous aerosols. The accuracy of the inventories and the model formulation has been tested by comparing the model simulations of carbonaceous aerosols in the atmosphere and in precipitation with observations reported in the literature. For most locations and seasons, the predicted concentrations are in reasonable agreement with the observations, although the model underpredicts black carbon concentrations in polar regions. The predicted concentrations in remote areas are extremely sensitive to both the rate of removal by wet deposition and the height of injection of the aerosols. Finally, a global map of the aerosol single scattering albedo was developed from the simulated carbonaceous particle distribution and a previously developed model for aerosol sulfates. The computed aerosol single scattering albedos compare well with observations, suggesting that most of the important aerosol species have been included in the model. For most locations and seasons, the single scattering albedo is larger than 0.85, indicating that these aerosols, in general, lead to a net cooling. C1 LAWRENCE LIVERMORE NATL LAB, GLOBAL CLIMATE RES DIV, LIVERMORE, CA 94551 USA. CEA, CNRS, CTR FAIBLES RADIOACTIVITES, F-91198 GIF SUR YVETTE, FRANCE. RI Penner, Joyce/J-1719-2012; chuang, cathy/H-4814-2012 NR 148 TC 483 Z9 510 U1 3 U2 53 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 AUG 27 PY 1996 VL 101 IS D14 BP 19411 EP 19432 DI 10.1029/95JD03426 PG 22 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800042 ER PT J AU Jennings, SG Spain, TG Doddridge, BG Maring, H Kelly, BP Hansen, ADA AF Jennings, SG Spain, TG Doddridge, BG Maring, H Kelly, BP Hansen, ADA TI Concurrent measurements of black carbon aerosol and carbon monoxide at Mace Head SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article; Proceedings Paper CT 5th International Conference on Carbonaceous Particles in the Atmosphere CY AUG 23-26, 1994 CL LAWRENCE BERKELEY NATL LAB, BERKELEY, CA SP Lawrence Berkeley Natl Lab, Lawrence Livermore Natl Lab HO LAWRENCE BERKELEY NATL LAB ID ABSORPTION; PARTICLES; ATTENUATION; TRANSPORT; AMBIENT AB Continuous measurements of white light attenuation (ATN) through a quartz fiber filter (related to aerosol black carbon content) and of carbon monoxide (CO) carried out over the period December 1991 through July 1992 at the Mace Head atmospheric field research station (53 degrees 19'N, 9 degrees 54'W) near Carna, County Galway on the west coast of Ireland are presented. Isentropic air flow back trajectories, condensation nuclei concentration data, and meteorological data were generated as part of the Atmosphere/Ocean Chemistry Experiment. Use is made of this supporting data together with synoptic weather charts in the analysis of the measurements. Measurements of ATN and CO are reported for unmodified marine air from the North Atlantic which yield ATN and ATN/CO values in the range 1-4 x 10(-3) m(-3) and 1-4 x 10(-5) m(-3) ppbv(-1). Increasing values of ATN and ATN/CO are obtained for polluted transatlantic air, modified marine air, and polluted air from the UK and/or Europe. The covariance of ATN and CO obtained for these air masses suggests a common source. Transport of air from west of the African Saharan region to Mace Head is accompanied by a rise in optical attenuation purported to be due to absorbing desert dust aerosol without a concurrent rise in CO. C1 UNIV MARYLAND, DEPT METEOROL, COLLEGE PK, MD 20742 USA. UNIV MIAMI, ROSENSTIEL SCH MARINE & ATMOSPHER SCI, MIAMI, FL 33149 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP Jennings, SG (reprint author), NATL UNIV IRELAND UNIV COLL GALWAY, DEPT EXPT PHYS, GALWAY, IRELAND. OI Spain, Gerard/0000-0002-4548-2483 NR 21 TC 34 Z9 34 U1 1 U2 6 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 AUG 27 PY 1996 VL 101 IS D14 BP 19447 EP 19454 DI 10.1029/96JD00614 PG 8 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800044 ER PT J AU RiveraCarpio, CA Corrigan, CE Novakov, T Penner, JE Rogers, CF Chow, JC AF RiveraCarpio, CA Corrigan, CE Novakov, T Penner, JE Rogers, CF Chow, JC TI Derivation of contributions of sulfate and carbonaceous aerosols to cloud condensation nuclei from mass size distributions SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article; Proceedings Paper CT 5th International Conference on Carbonaceous Particles in the Atmosphere CY AUG 23-26, 1994 CL LAWRENCE BERKELEY NATL LAB, BERKELEY, CA SP Lawrence Berkeley Natl Lab, Lawrence Livermore Natl Lab HO LAWRENCE BERKELEY NATL LAB ID UNITED-STATES; ANTHROPOGENIC AEROSOLS; CLIMATE; ALBEDO; SYSTEM AB We have estimated the contributions of mass concentrations of major aerosol species (sulfate, carbonaceous material, and sea salt) to cloud condensation nuclei (CCN) number concentrations from simultaneous measurements of aerosol number size distributions, impactor-derived mass size distributions of aerosol species, and CCN number concentrations (measured at 0.5% supersaturation). Our approach involves the derivation of number size distributions from the impactor data by numerical data inversion from which the mass contributions of sulfate, organic material and sea salt to CCN number concentrations are estimated, The utility of this approach is demonstrated by the results obtained at Point Reyes, California, where we compared the derived number size distributions with directly measured number size distributions. Direct measurements of the CCN concentrations for 0.5% supersaturation showed agreement of +/-25% with CCN derived from impactor data. The contribution of sulfate to CCN concentrations was found to be between 20 and 65% versus contribution of organic particles between 4 and 80%. Thus sometimes sulfate can contribute most of the CCN, while at other times organic aerosols dominate the CCN concentrations. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV ENERGY & ENVIRONM, BERKELEY, CA 94720 USA. LAWRENCE LIVERMORE NATL LAB, GLOBAL CLIMATE RES DIV, LIVERMORE, CA 94550 USA. UNIV NEVADA, DESERT RES INST, ENERGY & ENVIRONM ENGN CTR, RENO, NV 89506 USA. RI Penner, Joyce/J-1719-2012 NR 24 TC 77 Z9 79 U1 0 U2 4 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 AUG 27 PY 1996 VL 101 IS D14 BP 19483 EP 19493 DI 10.1029/95JD01077 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VE258 UT WOS:A1996VE25800047 ER PT J AU Szabo, VM Burr, B AF Szabo, VM Burr, B TI Simple inheritance of key traits distinguishing maize and teosinte SO MOLECULAR & GENERAL GENETICS LA English DT Article DE teosinte; maize; morphological traits ID RECOMBINANT INBREDS; ZEA GRAMINEAE; ORIGIN; POPULATIONS; EVOLUTION; GENES; LOCUS AB The segregation of key traits distinguishing maize and teosinte was analyzed in three F-2 and three backcross populations derived from crosses of the modern maize inbred T232 with Zea mays ssp. parviglumis. These traits were (i) paired vs. single female spikelets; (ii) two-ranked vs. many-ranked ears; (iii) non-indurated vs. indurated glumes; (iv) inclination of the kernels toward the rachis, and (v) distichous vs. polystichous central staminate spike. All traits showed a simple mode of inheritance except for paired female spikes, which appeared to be controlled by two genes. The loci controlling these major changes were mapped with RFLP markers to four chromosomal regions. These results support the suggestion that maize became differentiated from teosinte with as few as five major gene changes. RP Szabo, VM (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 34 TC 13 Z9 13 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0026-8925 J9 MOL GEN GENET JI Mol. Gen. Genet. PD AUG 27 PY 1996 VL 252 IS 1-2 BP 33 EP 41 DI 10.1007/BF02173202 PG 9 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA VH657 UT WOS:A1996VH65700004 PM 8804401 ER PT J AU Botkin, D Glass, J Chemla, DS Ogletree, DF Salmeron, M Weiss, S AF Botkin, D Glass, J Chemla, DS Ogletree, DF Salmeron, M Weiss, S TI Advances in ultrafast scanning tunneling microscopy SO APPLIED PHYSICS LETTERS LA English DT Article ID RESOLUTION; SAPPHIRE; SILICON AB Time resolved tunnel current was measured over 4 orders of magnitude in separation between tip and sample using an ultrafast scanning tunneling microscope (USTM). These measurements reveal two distinct regimes for tip height dependence of the signal. In addition, we report 900 femtosecond temporal resolution with a sensitivity of 20 mV/root Hz in USTM measurements of voltage pulses on a coplanar transmission line, and we show that the microscope operates as a high impedance probe. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV MAT SCI,BERKELEY,CA 94720. RI weiss, shimon/B-4164-2009; Ogletree, D Frank/D-9833-2016 OI weiss, shimon/0000-0002-0720-5426; Ogletree, D Frank/0000-0002-8159-0182 NR 17 TC 43 Z9 43 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 26 PY 1996 VL 69 IS 9 BP 1321 EP 1323 DI 10.1063/1.117581 PG 3 WC Physics, Applied SC Physics GA VD632 UT WOS:A1996VD63200049 ER PT J AU Lin, YH Cunningham, GA Coggeshall, SV AF Lin, YH Cunningham, GA Coggeshall, SV TI Input variable identification - Fuzzy curves and fuzzy surfaces SO FUZZY SETS AND SYSTEMS LA English DT Article ID PRINCIPAL AB When modeling a complex, poorly defined, nonlinear problem with hundreds of possible inputs, we must identify the significant inputs before any known nonlinear modeling techniques can be applied. In this paper the concept of fuzzy surfaces is introduced and used to automatically and quickly identify a subset of independent significant inputs for use in nonlinear system models. C1 NEW MEXICO INST MIN & TECHNOL,DEPT ELECT ENGN,SOCORRO,NM 87801. LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545. RP Lin, YH (reprint author), LOS ALAMOS NATL LAB,COMP & COMMUN DIV,POB 1663,LOS ALAMOS,NM 87545, USA. NR 15 TC 23 Z9 24 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0165-0114 J9 FUZZY SET SYST JI Fuzzy Sets Syst. PD AUG 26 PY 1996 VL 82 IS 1 BP 65 EP 71 DI 10.1016/0165-0114(95)00223-5 PG 7 WC Computer Science, Theory & Methods; Mathematics, Applied; Statistics & Probability SC Computer Science; Mathematics GA VD094 UT WOS:A1996VD09400008 ER PT J AU Traiber, AJS Turchi, PEA Waterstrat, RM Allen, SM AF Traiber, AJS Turchi, PEA Waterstrat, RM Allen, SM TI Electronic structure and phase equilibria in ternary substitutional alloys SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID TIGHT-BINDING PARAMETERS; GROUND-STATE STRUCTURES; TRANSITION-METALS; BINARY-ALLOYS; SYSTEMS; STABILITY; DIAGRAMS; SILICON; ENERGY; MODEL AB A reliable and consistent scheme for studying phase equilibria in ternary substitutional alloys based on the tight-binding approximation is presented. With the electronic parameters obtained from linear muffin-tin orbital calculations, we show that the computed densities of states and band structures compare well with those obtained from more accurate ab initio calculations. Disordered alloys are studied within the tight-binding coherent-potential approximation formalism extended to multi-component alloys. The energetics of ordered systems is obtained through effective-pair interactions computed with the general perturbation method. Finally, partially ordered alloys are studied with a novel simplification of the molecular coherent-potential approximation combined with the general perturbation method. The formalism is applied to the study of bcc-based ternary Zr-Ru-Pd alloys which are promising candidates for medical implant device applications. Using the energetics obtained with the aforementioned scheme, we apply the cluster-variation method to study phase equilibria for particular pseudo-binary alloys, and show that the results are consistent with the observed behaviour of the electronic specific heat coefficient with composition for the Zr-0.5(Ru, Pd)(0.5) system. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94551. NIST,DIV MET,GAITHERSBURG,MD 20899. RP Traiber, AJS (reprint author), MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139, USA. NR 65 TC 10 Z9 10 U1 1 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 26 PY 1996 VL 8 IS 35 BP 6357 EP 6379 DI 10.1088/0953-8984/8/35/006 PG 23 WC Physics, Condensed Matter SC Physics GA VE807 UT WOS:A1996VE80700006 ER PT J AU Wilson, JR AF Wilson, JR TI A hydrodynamic model for nuclear stopping SO NUCLEAR PHYSICS A LA English DT Article AB A three-fluid one-dimensional hydrodynamic model for relativistic heavy-ion collisions is presented. The three fluids are left- and right-moving nucleonic matter and a third fluid representing the energy produced by the collisions of the nucleonic particles. For the collision of nucleons with the energy fluid, the cross section per proton mass of fluid is taken equal to the proton-proton cross section. The energy exchange per collision is assumed to be about 1.4 GeV. Complete stopping at the CERN energy of 200 GeV/N occurs in this model. The results are fairly insensitive to the nucleon-energy-fluid cross section. RP LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94550 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 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 AUG 26 PY 1996 VL 606 IS 1-2 BP 339 EP 346 DI 10.1016/0375-9474(96)00233-3 PG 8 WC Physics, Nuclear SC Physics GA VH279 UT WOS:A1996VH27900025 ER PT J AU LopezMartens, A Hannachi, F Dossing, T Schuck, C Collatz, R Gueorguieva, E Vieu, C Leoni, S Herskind, B Khoo, TL Lauritsen, T Ahmad, I Blumenthal, DJ Carpenter, MP Gassmann, D Janssens, RVF Nisius, D Korichi, A Bourgeois, C Astier, A Ducroux, L LeCoz, Y Meyer, M Redon, N SharpeySchafer, JF Wilson, AN Korten, W Bracco, A Lucas, R AF LopezMartens, A Hannachi, F Dossing, T Schuck, C Collatz, R Gueorguieva, E Vieu, C Leoni, S Herskind, B Khoo, TL Lauritsen, T Ahmad, I Blumenthal, DJ Carpenter, MP Gassmann, D Janssens, RVF Nisius, D Korichi, A Bourgeois, C Astier, A Ducroux, L LeCoz, Y Meyer, M Redon, N SharpeySchafer, JF Wilson, AN Korten, W Bracco, A Lucas, R TI Fragmentation of the decay from the superdeformed yrast band in Hg-192 SO PHYSICAL REVIEW LETTERS LA English DT Article ID LEVEL DENSITIES; GAMMA-RAYS; DETECTOR; SPECTRA; SPIN AB The decay-out spectrum of the superdeformed yrast band in Hg-192 comprises a quasicontinuum, from which about 50 weak discrete transitions of energy between 1 and 3.2 MeV are resolved. The fluctuations of the one-dimensional quasicontinuum spectrum are studied with the fluctuation analysis method, which shows that of the order of a few thousand different transitions are available in the first step of the decay-out cascades. The experimental effective number of transitions is compared to schematic theoretical calculations. C1 NIELS BOHR INST,DK-4000 ROSKILDE,DENMARK. ARGONNE NATL LAB,ARGONNE,IL 60439. IPN,F-91405 ORSAY,FRANCE. UNIV LYON 1,IPN,F-69622 VILLEURBANNE,FRANCE. UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV BONN,INST STRAHLEN & KERNPHYS,D-53115 BONN,GERMANY. UNIV MILAN,INST PHYS,I-20133 MILAN,ITALY. CEA SACLAY,DAPNIA SPHN,F-91191 GIF SUR YVETTE,FRANCE. RP LopezMartens, A (reprint author), CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASSE,IN2P3,CNRS,BAT 104-108,F-91405 ORSAY,FRANCE. RI KORTEN, Wolfram/H-3043-2013; Carpenter, Michael/E-4287-2015; OI Carpenter, Michael/0000-0002-3237-5734; KORTEN, Wolfram/0000-0002-3940-0816 NR 21 TC 31 Z9 31 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 AUG 26 PY 1996 VL 77 IS 9 BP 1707 EP 1710 DI 10.1103/PhysRevLett.77.1707 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000012 ER PT J AU Smith, AG Durell, JL Phillips, WR Jones, MA Leddy, M Urban, W Varley, BJ Ahmad, I Morss, LR Bentaleb, M Guessous, A Lubkiewicz, E Schulz, N Wyss, R AF Smith, AG Durell, JL Phillips, WR Jones, MA Leddy, M Urban, W Varley, BJ Ahmad, I Morss, LR Bentaleb, M Guessous, A Lubkiewicz, E Schulz, N Wyss, R TI Spin-dependent triaxial deformation in neutron-rich Mo isotopes SO PHYSICAL REVIEW LETTERS LA English DT Article ID STATE; BANDS AB The Eurogam-2 array has been used to study gamma rays emitted following the spontaneous fission of a Cm-248 source. Analysis of Doppler-broadened line shapes corresponding to decays from excited rotational states in neutron-rich Sr, Zr, and Mo fission fragments has enabled the first measurements of state lifetimes in these nuclei at around I = 10. The results are consistent with a predicted rotation-induced change in the triaxiality of the yrast states of the Mo isotopes that contrasts with the more stable behavior observed in the Zr and Sr nuclei. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV STRASBOURG 1,CTR RECH NUCL,CNRS,IN2P3,F-67037 STRASBOURG,FRANCE. KTH,PHYS DEPT FRESCATI,S-10405 STOCKHOLM,SWEDEN. JAGIELLONIAN UNIV,KRAKOW,POLAND. RP Smith, AG (reprint author), UNIV MANCHESTER,DEPT PHYS & ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 11 TC 62 Z9 64 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 26 PY 1996 VL 77 IS 9 BP 1711 EP 1714 DI 10.1103/PhysRevLett.77.1711 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000013 ER PT J AU Wang, J McGuire, JH Burgdorfer, J Qiu, Y AF Wang, J McGuire, JH Burgdorfer, J Qiu, Y TI Differential double ionization of He by Compton photons and charged particles at large energy transfers SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXCITATION-IONIZATION; SINGLE IONIZATION; HELIUM; SCATTERING; PROTONS; RATIO; PHOTOIONIZATION; IMPACT AB Double ionization of helium differential in energy transfer, epsilon, is studied for both high-energy Compton photons and charged particles. The ratios of double to single ionization, R(C)(epsilon) for Compton scattering, and R(Z)(epsilon) for charged particles, are found to display an unexpected behavior: For large epsilon up to the two-body binary encounter (BE) limit, epsilon(BE), we find R(C)(epsilon) = R(Z)(epsilon) similar or equal to 0.86% in good agreement with recent experimental data. For even larger epsilon > epsilon(BE), R(C)(epsilon) and R(Z)(epsilon) are modified by an ''exchange shakeoff'' mechanism. At epsilon much greater than epsilon(BE) much greater than 1, both differential (unlike integrated) ratios are predicted to approach the photoionization limit. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP Wang, J (reprint author), TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118, USA. NR 22 TC 25 Z9 25 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 AUG 26 PY 1996 VL 77 IS 9 BP 1723 EP 1726 DI 10.1103/PhysRevLett.77.1723 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000016 ER PT J AU Beck, BR Steiger, J Weinberg, G Church, DA McDonald, J Schneider, D AF Beck, BR Steiger, J Weinberg, G Church, DA McDonald, J Schneider, D TI Measurement of charge exchange between H-2 and low-energy ions with charge states 35<=q<=80 SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRON-CAPTURE; CROSS-SECTIONS; COLLISIONS; IMPACT; ATOMS AB Charge-exchange cross sections for collisions between H-2 and ions with unusually low center-of-mass energies (approximate to 6 eV) and high-charge states (Xe-q+:35,43 less than or equal to q less than or equal to 46,Th-q+:73 less than or similar to q less than or equal to 80) have been measured using a Penning ion trap. A nondestructive measurement technique permitted both primary and product ion analysis. The data, averaged over the charge states indicated above, are consistent with a total cross section that scales linearly with ion charge q. The true double-capture cross section is found to be about 25% of the total cross section at high q. The results are compared to predictions of the absorbing-sphere model. C1 TEXAS A&M UNIV,DEPT PHYS,COLLEGE STN,TX 77843. RP Beck, BR (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 14 TC 28 Z9 28 U1 2 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 26 PY 1996 VL 77 IS 9 BP 1735 EP 1738 DI 10.1103/PhysRevLett.77.1735 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000019 ER PT J AU Choi, W Camassa, R AF Choi, W Camassa, R TI Long internal waves of finite amplitude SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOLITARY WAVES; STRATIFIED FLUIDS; DEPTH AB We derive new nonlinear evolution equations for long internal waves in a two-fluid system, when the thickness of the lower layer is effectively infinite, by making the only assumption that the thickness of the upper layer is small compared with the characteristic wavelength. The resulting equations have the full nonlinearity of the original problem and retain the leading-order dispersive effects. For large amplitude internal solitary waves, we show that our model captures the scaling relation between the amplitude and the characteristic wavelength observed experimentally by Koop and Butler. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP Choi, W (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 12 TC 23 Z9 24 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 26 PY 1996 VL 77 IS 9 BP 1759 EP 1762 DI 10.1103/PhysRevLett.77.1759 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000025 ER PT J AU Wang, YY Zhang, FC Dravid, VP Ng, KK Klein, MV Schnatterly, SE Miller, LL AF Wang, YY Zhang, FC Dravid, VP Ng, KK Klein, MV Schnatterly, SE Miller, LL TI Momentum-dependent charge transfer excitations in Sr2CuO2Cl2 angle-resolved electron energy loss spectroscopy SO PHYSICAL REVIEW LETTERS LA English DT Article ID LAMELLAR COPPER OXIDES; OPTICAL-ABSORPTION; SUPERCONDUCTORS; SCATTERING AB Electron-hole pair excitations in the insulating cuprates Sr2CuO2Cl2 were investigated by angle-resolved electron energy loss spectroscopy. The optically allowed and optically forbidden transitions were observed to be strongly anisotropic in the Cu-O-2 plane. The former show a large energy dispersion similar to 1.5 eV along [110], and the latter appear at a higher energy position (similar to 4.5 eV) only along [100], but not along [110]. We interpret these results as transitions involving excitons. A small exciton model is examined to explain both the observed features. C1 NORTHWESTERN UNIV,SCI & TECHNOL CTR SUPERCONDUCT,EVANSTON,IL 60208. UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221. HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,KOWLOON,HONG KONG. UNIV ILLINOIS,DEPT PHYS,SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801. UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP Wang, YY (reprint author), NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208, USA. RI Dravid, Vinayak/B-6688-2009 NR 21 TC 54 Z9 54 U1 1 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 AUG 26 PY 1996 VL 77 IS 9 BP 1809 EP 1812 DI 10.1103/PhysRevLett.77.1809 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000038 ER PT J AU Salkola, MI Balatsky, AV Scalapino, DJ AF Salkola, MI Balatsky, AV Scalapino, DJ TI Theory of scanning tunneling microscopy probe of impurity states in a D-wave superconductor SO PHYSICAL REVIEW LETTERS LA English DT Article ID ANISOTROPIC SUPERCONDUCTORS; SCATTERING; TRANSPORT AB Scanning tunneling microscopy can provide a probe for the detailed study of quasiparticle states in high-T-c superconductors. We propose that it can also be used to acquire specific information about impurity-induced quasiparticle states and the superconducting order-parameter structure. In particular, the local density of states is found to be sensitive to impurity-induced resonances and to the symmetry of the order parameter. C1 MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON,ON L8S 4M1,CANADA. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. NR 19 TC 162 Z9 162 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 26 PY 1996 VL 77 IS 9 BP 1841 EP 1844 DI 10.1103/PhysRevLett.77.1841 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000046 ER PT J AU Vinokur, VM Marchetti, MC Chen, LW AF Vinokur, VM Marchetti, MC Chen, LW TI Glassy motion of elastic manifolds SO PHYSICAL REVIEW LETTERS LA English DT Article ID DRIVEN INTERFACES; DISORDERED MEDIUM; DYNAMICS; SUPERCONDUCTORS AB We discuss the low-temperature dynamics of an elastic manifold driven through a random medium. For driving forces well below the T = 0 depinning force, the medium advances via thermally activated hops over the energy barriers separating favorable metastable states. We show that the distribution of waiting times for these hopping processes scales as a power law. This power-law distribution naturally yields a nonlinear glassy response for the driven medium, v similar to exp(-const x F--mu). C1 SYRACUSE UNIV,DEPT PHYS,SYRACUSE,NY 13244. RP Vinokur, VM (reprint author), ARGONNE NATL LAB,DIV SCI MAT,ARGONNE,IL 60439, USA. NR 18 TC 44 Z9 44 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 AUG 26 PY 1996 VL 77 IS 9 BP 1845 EP 1848 DI 10.1103/PhysRevLett.77.1845 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000047 ER PT J AU Heffner, RH Le, LP Hundley, MF Neumeier, JJ Luke, GM Kojima, K Nachumi, B Uemura, YJ MacLaughlin, DE Cheong, SW AF Heffner, RH Le, LP Hundley, MF Neumeier, JJ Luke, GM Kojima, K Nachumi, B Uemura, YJ MacLaughlin, DE Cheong, SW TI Ferromagnetic ordering and unusual magnetic ion dynamics in La0.67Ca0.33MnO3 SO PHYSICAL REVIEW LETTERS LA English DT Article ID MUON SPIN RELAXATION; CA-MN-O; LOW-TEMPERATURE; ZERO-FIELD; MAGNETORESISTANCE; LA1-XCAXMNO3; RESISTIVITY; TRANSITION; TRANSPORT; FILMS AB Zero-field muon spin relaxation and resistivity experiments on La0.67Ca0.33MnO3 powder show that the sublattice magnetization nu(mu)(T) is well described for T less than or equal to T-c by (1 - T/T-c)(beta), where beta = 0.345 +/- 0.015, characteristic of a second-order phase transition for a 3D spin system, and the ferromagnetic transition temperature (T-c = 274 K) and resistivity peak temperature coincide to within 1 K. Below T-C nu(mu) and the zero-field resistivity rho are correlated, with nu(mu) proportional to - ln rho. Unusual relaxational dynamics suggest spatially inhomogeneous Mn-ion correlation times. These results are discussed in terms of the possible effects of polarons on the spin and charge dynamics. C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027. UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP Heffner, RH (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Luke, Graeme/A-9094-2010; OI Luke, Graeme/0000-0003-4762-1173 NR 35 TC 148 Z9 149 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 AUG 26 PY 1996 VL 77 IS 9 BP 1869 EP 1872 DI 10.1103/PhysRevLett.77.1869 PG 4 WC Physics, Multidisciplinary SC Physics GA VD430 UT WOS:A1996VD43000053 ER PT J AU Brenner, JR AF Brenner, JR TI Heterogeneous chiral catalysis: Past, present, and future SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 1 EP CATL PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901613 ER PT J AU Johnson, DC Popovic, N Feng, JR AF Johnson, DC Popovic, N Feng, JR TI Inorganic modification of solid electrodes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 1 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500247 ER PT J AU Baisden, PA AF Baisden, PA TI Summer school in nuclear chemistry sponsored by the acs division of nuclear chemistry and technology (DNC&T) - A historical perspective. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 2 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502772 ER PT J AU Kelley, SK AF Kelley, SK TI Permselective properties of cellulose esters SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 2 EP CELL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500549 ER PT J AU Premuzic, ET Lin, MS AF Premuzic, ET Lin, MS TI Induced biochemical interactions in crude oils. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 2 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900461 ER PT J AU Chu, YY AF Chu, YY TI Nuclear chemistry summer school at Brookhaven. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 3 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502773 ER PT J AU Sassone, DM Holman, SH Whyte, HM Shinkel, JE AF Sassone, DM Holman, SH Whyte, HM Shinkel, JE TI Development of a written comprehensive chemical safety program SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 3 EP CHAS PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500968 ER PT J AU Foster, CM Jammy, R Bai, GP AF Foster, CM Jammy, R Bai, GP TI Systematic approach to MOCVD processing chemistry for epitaxial Pb(ZrxTi1-x)O-3 thin films SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. HEWLETT PACKARD LAB,PALO ALTO,CA 94304. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 4 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901655 ER PT J AU Kaufman, EN Harkins, JB Rodriguez, M Selvaraj, PT Tsouris, C AF Kaufman, EN Harkins, JB Rodriguez, M Selvaraj, PT Tsouris, C TI Biodesulfurization of dibenzothiophene and crude oil using electrospray reactors. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RI Unciano, Noel/B-6810-2009 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 5 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900464 ER PT J AU Schinkel, JE Werner, AK Hargraves, WR AF Schinkel, JE Werner, AK Hargraves, WR TI Chemical hazard labeling made easy using desktop computers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 5 EP CHAS PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500970 ER PT J AU Vairavamurthy, MA Wang, SH Maletic, D Chakarian, V AF Vairavamurthy, MA Wang, SH Maletic, D Chakarian, V TI Sulfur and nitrogen speciation in humic substances by x-ray absorption near-edge structure spectroscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,GEOCHEM PROGRAM,UPTON,NY 11973. USN,RES LAB,WASHINGTON,DC 20375. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 5 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501947 ER PT J AU McAteer, K Kennedy, MA Jing, YQ Taylor, JS AF McAteer, K Kennedy, MA Jing, YQ Taylor, JS TI 750 MHZ NMR study of the structure of a DNA dodecamer duplex containing a cis-syn thymine dimer. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. WASHINGTON UNIV, DEPT CHEM, ST LOUIS, MO 63130 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 6 EP BIOL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500381 ER PT J AU Philpott, MR Glosli, JN Roberts, J AF Philpott, MR Glosli, JN Roberts, J TI Adsorption, deposition end dissolution at charged metal surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 6 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501181 ER PT J AU Winans, RE Tomczyk, NA Hunt, JE AF Winans, RE Tomczyk, NA Hunt, JE TI Changes in nitrogen containing molecules during the coalification process SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 7 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501949 ER PT J AU Glosli, JN Philpott, MR Belak, J AF Glosli, JN Philpott, MR Belak, J TI Molecular dynamics simulation of a:C and a:CH films SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 9 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901660 ER PT J AU Hall, HL AF Hall, HL TI Measuring small amounts: From fission physics to environmental radiochemistry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,CHEM & MAT SCI DIRECTORATE,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 9 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502779 ER PT J AU Gruen, DM AF Gruen, DM TI The symposium on high temperature synthesis of materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 10 EP MTLS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901661 ER PT J AU Stoyer, MA Hudson, GB Lougheed, RW AF Stoyer, MA Hudson, GB Lougheed, RW TI Radiochemical diagnostics for the national ignition facility. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,ISOTOPES SCI DIV,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 10 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502780 ER PT J AU Palmer, PD Clark, DL Tait, CD AF Palmer, PD Clark, DL Tait, CD TI Spectroscopic and redox studies of actinides in high ionic strength solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 11 EP TECH PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501035 ER PT J AU Clifford, DJ Hatcher, PG Botto, RE Muntean, JV AF Clifford, DJ Hatcher, PG Botto, RE Muntean, JV TI The macromolecular structure of class I (polylabdanoid) resinites SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. PENN STATE UNIV,FUEL SCI DEPT,UNIVERSITY PK,PA 16802. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 12 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501954 ER PT J AU Tuttle, BA Voigt, JA AlShareef, HN Dimos, D AF Tuttle, BA Voigt, JA AlShareef, HN Dimos, D TI An overview of ferroelectric thin film technology SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI Alshareef, Husam Niman/A-2000-2015 OI Alshareef, Husam Niman/0000-0001-5029-2142 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 12 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901663 ER PT J AU Hopkins, AR Rasmussen, PG Basheer, RA Annis, BK Wignall, GD AF Hopkins, AR Rasmussen, PG Basheer, RA Annis, BK Wignall, GD TI Small angle neutron scattering (SANS) and small angle X-ray scattering (SAXS) analysis of polyaniline salts and blends. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV MICHIGAN,CTR MACROMOL SCI & ENGN,ANN ARBOR,MI 48109. GM CORP,CTR RES & DEV,POLYMERS DEPT,WARREN,MI 48090. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 13 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901292 ER PT J AU Jensen, MP Morss, LR Nash, KL AF Jensen, MP Morss, LR Nash, KL TI Complexation of lanthanide and actinide cations by aminomethane-1,1-diphosphonic acids. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 13 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502783 ER PT J AU Dehmer, PM AF Dehmer, PM TI Materials science research in the office of basic energy sciences SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,OFF BASIC ENERGY SCI,GERMANTOWN,MD 20874. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 15 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901666 ER PT J AU Feng, BB Hingerty, B Geacintov, NE Broyde, S Patel, DJ AF Feng, BB Hingerty, B Geacintov, NE Broyde, S Patel, DJ TI Solution conformation of (+)-trans-anti-benzo[a]pyrene-dG adduct positioned at a DNA replication fork junction. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MEM SLOAN KETTERING CANC CTR,CELLULAR BIOCHEM & BIOPHYS PROGRAM,NEW YORK,NY 10021. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NYU,DEPT CHEM,NEW YORK,NY 10003. NYU,DEPT BIOL,NEW YORK,NY 10003. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 15 EP TOXI PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501051 ER PT J AU White, DC Ringelberg, DB AF White, DC Ringelberg, DB TI Signature lipid biomarker analysis for the quantitative analysis of environmental microbial ecology SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,KNOXVILLE,TN 37932. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 2 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 15 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501642 ER PT J AU Cosman, M Hingerty, BE Broyde, S Luneva, NP Amin, S Geacintov, NE Patel, DJ AF Cosman, M Hingerty, BE Broyde, S Luneva, NP Amin, S Geacintov, NE Patel, DJ TI Solution structures of the (-)-cis-anti-benzo[a]pyrenyl-N-2-dG adduct and stereoisomerically related DNA adduct duplexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MEM SLOAN KETTERING CANC CTR,NEW YORK,NY 10021. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NYU,NEW YORK,NY 10003. AMER HLTH FDN,VALHALLA,NY 10595. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 17 EP TOXI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501053 ER PT J AU Hoffheins, BS Lauf, RJ McKnight, TE Beal, AJ Smith, RR AF Hoffheins, BS Lauf, RJ McKnight, TE Beal, AJ Smith, RR TI Design and testing of hydrogen sensors for industrial applications SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI McKnight, Tim/H-3087-2011 OI McKnight, Tim/0000-0003-4326-9117 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 17 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502054 ER PT J AU McLuckey, SA Stephenson, JL Goeringer, DE AF McLuckey, SA Stephenson, JL Goeringer, DE TI Gas-phase bio-ion/ion reactions: Charge transfer and ion pairing. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 17 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900522 ER PT J AU Bash, PA Stoddard, BL Dean, A AF Bash, PA Stoddard, BL Dean, A TI Combining Laue diffraction and molecular dynamics to study enzyme intermediates: Formation of the Michaelis complex in isocitrate dehydrogenase. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. FRED HUTCHINSON CANC RES CTR,SEATTLE,WA 98104. CHICAGO MED SCH,DEPT BIOCHEM,N CHICAGO,IL 60635. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 18 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501406 ER PT J AU Mao, B Chen, J Hingerty, BE Amin, S Geacintov, NE Broyde, S Patel, DJ AF Mao, B Chen, J Hingerty, BE Amin, S Geacintov, NE Broyde, S Patel, DJ TI Solution structure and 5'-intercalation of the polynuclear aromatic BP residue in a (+)-cis-anti-[BP]-N-6-dA adduct opposite dT in a DNA duplex SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MEM SLOAN KETTERING CANC CTR,CELL BIOCHEM & BIOPHYS PROGRAM,NEW YORK,NY 10021. NYU,DEPT CHEM,NEW YORK,NY 10003. NYU,DEPT BIOL,NEW YORK,NY 10003. OAK RIDGE NATL LAB,DIV HLTH SCI RES,OAK RIDGE,TN 37831. AMER HLTH FDN,VALHALLA,NY 10595. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 18 EP TOXI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501054 ER PT J AU Guhlke, S Rhodes, BA Marek, MJ Bender, H Biersack, HJ Mirzadeh, S Knapp, FF AF Guhlke, S Rhodes, BA Marek, MJ Bender, H Biersack, HJ Mirzadeh, S Knapp, FF TI Radiotherapy using the Re-188-labeled RC-160 peptide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 RHOMED INC,ALBUQUERQUE,NM. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 19 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502789 ER PT J AU Mendelsohn, MH AF Mendelsohn, MH TI Reactions of gaseous, elemental mercury with dilute halogen solutions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENERGY SYST,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 20 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501831 ER PT J AU Terminello, LJ Carlisle, JA Sutherland, DG Falabella, S Zuiker, CD Krauss, AR Gruen, DM Jimenez, I Shuh, DK Himpsel, FJ AF Terminello, LJ Carlisle, JA Sutherland, DG Falabella, S Zuiker, CD Krauss, AR Gruen, DM Jimenez, I Shuh, DK Himpsel, FJ TI Core-level photoabsorption characterization of diamond and carbon films SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. UNIV WISCONSIN,MADISON,WI 53706. RI Jimenez, Ignacio/F-7422-2010 OI Jimenez, Ignacio/0000-0001-5605-3185 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 20 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901671 ER PT J AU Kennel, SJ Mirzadeh, S AF Kennel, SJ Mirzadeh, S TI Vascular targeting for radioimmunotherapy with Bi-213. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV HLTH SCI RES,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 21 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502791 ER PT J AU Jacobs, P AF Jacobs, P TI Recent results from NA49 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 22 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502792 ER PT J AU Yang, Z Burlage, RS Sanford, WE Moline, GR AF Yang, Z Burlage, RS Sanford, WE Moline, GR TI DNA-labeled silica microspheres for groundwater tracing and colloid transport studies. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Sanford, William/F-7380-2016 OI Sanford, William/0000-0001-9085-1367 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 22 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501649 ER PT J AU Ferrance, J Bockrath, BC Warzinski, RP AF Ferrance, J Bockrath, BC Warzinski, RP TI A liquefaction kinetic research needs assessment SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 26 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501837 ER PT J AU Fields, CL Pitts, JR Hebin, M Lewandowski, A AF Fields, CL Pitts, JR Hebin, M Lewandowski, A TI An update on solar fullerene production at the National Renewable Energy Laboratory. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 26 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901677 ER PT J AU vanHecke, H AF vanHecke, H TI Collision dynamics from data and event generators SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 26 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502794 ER PT J AU Ahmed, M Suits, AG AF Ahmed, M Suits, AG TI Oxalyl chloride photofragment imaging: One photon - Four fragments. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LBNL,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 29 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900534 ER PT J AU Jamison, GM Saunders, RS Wheeler, DR Alam, TM Loy, DA AF Jamison, GM Saunders, RS Wheeler, DR Alam, TM Loy, DA TI Multiple phosphaalkyne additions to high oxidation state tungsten alkylidenes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 29 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502151 ER PT J AU Gakh, AA Janney, MA Hagaman, EW Buchanan, AC AF Gakh, AA Janney, MA Hagaman, EW Buchanan, AC TI Synthesis optimization for production of AZT, FLT and other AIDS/cancer-treatment drugs SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 30 EP MEDI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502588 ER PT J AU Schnupf, U FriedmanHill, E Durant, JL AF Schnupf, U FriedmanHill, E Durant, JL TI Distributed quantum chemistry calculations via Web-GUI. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 30 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501417 ER PT J AU Stohl, FV Lott, SE Diegert, KV Goodnow, DC AF Stohl, FV Lott, SE Diegert, KV Goodnow, DC TI Results of hydrotreating the kerosene fraction of HTI's first proof of concept run SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROC RES DEPT 6212,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 30 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501841 ER PT J AU Compton, RN Ying, ZC Hettich, RL AF Compton, RN Ying, ZC Hettich, RL TI Synthesis of doped fullerenes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Hettich, Robert/N-1458-2016 OI Hettich, Robert/0000-0001-7708-786X NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 31 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901682 ER PT J AU Cugini, AV Rothenberger, K Krastman, D Thompson, R Bernarding, R AF Cugini, AV Rothenberger, K Krastman, D Thompson, R Bernarding, R TI The effect of H-2 partial pressure and coal concentration on catalytic coal liquefaction and coprocessing. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 31 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501842 ER PT J AU SimonGillo, J AF SimonGillo, J TI Deuteron and anti-deuteron production in high energy heavy-ion collisions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 31 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502797 ER PT J AU Ellis, L Winans, RE Langworthy, TA AF Ellis, L Winans, RE Langworthy, TA TI Biological sources for phenylalkane hydrocarbons. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. UNIV S DAKOTA,DEPT MICROBIOL,VERMILLION,SD 57069. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 32 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501659 ER PT J AU Alberto, R Schibli, R Egli, A Schubiger, PA Knapp, FF AF Alberto, R Schibli, R Egli, A Schubiger, PA Knapp, FF TI Potential of the organometallic [M(CO)(3)](+) (M=Re, Tc) fragment for the labeling of proteins and small molecules SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. PAUL SCHERRER INST,DIV RADIOTHERAPY,CH-5232 VILLIGEN,SWITZERLAND. NR 0 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 34 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502800 ER PT J AU Lippert, T Bengali, A Koskelo, A Stoutland, PO AF Lippert, T Bengali, A Koskelo, A Stoutland, PO TI Ultrafast laser-driven reactions in polymers: Studied with picosecond infrared spectroscopy SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. RI Lippert, Thomas/N-2423-2016 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 34 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900034 ER PT J AU Shelnutt, JA Jentzen, W Song, XZ AF Shelnutt, JA Jentzen, W Song, XZ TI All substituted nickel porphyrins are highly nonplanar. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,FUEL SCI DEPT,ALBUQUERQUE,NM 87185. UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. RI Shelnutt, John/A-9987-2009 OI Shelnutt, John/0000-0001-7368-582X NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 35 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501975 ER PT J AU Gittins, CM Rohlfing, EA AF Gittins, CM Rohlfing, EA TI Quantitative analysis of combustion by-products using resonance enhanced multiphoton ionization mass spectrometry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 36 EP ANYL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500282 ER PT J AU Savikhin, S Struve, WS AF Savikhin, S Struve, WS TI Electronic energy transfer in light-harvesting antennas of green photosynthetic bacteria. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 36 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900541 ER PT J AU Verdera, ES Gaudiano, J Leon, A Martinez, G Robles, A Savio, E Leon, E McPherson, DW Knapp, FF AF Verdera, ES Gaudiano, J Leon, A Martinez, G Robles, A Savio, E Leon, E McPherson, DW Knapp, FF TI Rhenium-188-HEDP - Kit formulation and quality control. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV ROU,FQ,CAT RADIOQUIM,MONTEVIDEO,URUGUAY. FC,DPTO RADIOFARM CIN,MONTEVIDEO,URUGUAY. C MED NUCL FM,MONTEVIDEO,URUGUAY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 38 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502804 ER PT J AU Affleck, RL Ambrose, WP Cai, H Goodwin, PM Huang, Z Keller, RA Robbins, DL Schecker, JA Semin, DJ Petty, JT OQuinn, BL Wu, M Habbersett, RC Jett, JH Martin, JC RehaKrantz, LJ Demas, JN AF Affleck, RL Ambrose, WP Cai, H Goodwin, PM Huang, Z Keller, RA Robbins, DL Schecker, JA Semin, DJ Petty, JT OQuinn, BL Wu, M Habbersett, RC Jett, JH Martin, JC RehaKrantz, LJ Demas, JN TI Biomedical applications of single molecule detection. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV ALBERTA,DEPT BIOL SCI,EDMONTON,AB T6G 2E9,CANADA. UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 39 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900544 ER PT J AU Arterburn, JB Hall, KA Fogarty, IM Goreham, DM Bryan, JC Ott, KC AF Arterburn, JB Hall, KA Fogarty, IM Goreham, DM Bryan, JC Ott, KC TI Radiopharmaceutical design using novel Re-188 imido bioconjugates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 39 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502805 ER PT J AU Du, MT AF Du, MT TI Correlation of equilibrium constants with ionic strengths by sit, Pitzer and parabolic models. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 41 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502807 ER PT J AU Pines, A AF Pines, A TI Developments in high resolution NMR of inorganic solids SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 41 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502078 ER PT J AU Warzinski, RP Bockrath, BC Irdi, GA Booher, HB Wells, AW AF Warzinski, RP Bockrath, BC Irdi, GA Booher, HB Wells, AW TI Effect of a catalyst on the solvent-free liquefaction of DECS-17 coal. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 42 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501853 ER PT J AU Xia, YX Rao, LF Felmy, AR Rai, DP AF Xia, YX Rao, LF Felmy, AR Rai, DP TI Determination of the distribution of Pu, Np and U oxidation states in synthetic brines and dilute NaCl solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 42 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502808 ER PT J AU Aguilar, R Rigby, F Butcher, BM Papenguth, HW AF Aguilar, R Rigby, F Butcher, BM Papenguth, HW TI Retardation of colloidal actinides through filtration in intrusion borehole plugging and repository materials at the waste isolation pilot plant (WIPP). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. SCI APPLICAT INT CORP,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 43 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502809 ER PT J AU Xie, SN AF Xie, SN TI Biological applications of single molecule spectroscopy SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 43 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900548 ER PT J AU Gillow, JB Strietelmeier, BA Dodge, CJ Mantione, K Dunn, M Francis, AJ PansoyHjelvik, ME Kraus, SM Triay, IR Papenguth, HW AF Gillow, JB Strietelmeier, BA Dodge, CJ Mantione, K Dunn, M Francis, AJ PansoyHjelvik, ME Kraus, SM Triay, IR Papenguth, HW TI Microbe-actinide association in brine under waste isolation pilot plant (WIPP) repository test conditions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 44 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502810 ER PT J AU Kelly, JW Aguilar, R Papenguth, HW AF Kelly, JW Aguilar, R Papenguth, HW TI Contribution of mineral-fragment pseudocolloids to the mobile actinide source term of the waste isolation pilot plant (WIPP) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 45 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502811 ER PT J AU Vairavamurthy, MA AF Vairavamurthy, MA TI The role of sulfur in the formation of humic polymers in marine sediments. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,GEOCHEM PROGRAM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 45 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501985 ER PT J AU Luan, L Buelow, SJ Tumas, W AF Luan, L Buelow, SJ Tumas, W TI Selective air oxidation of cyclohexane in supercritical CO2 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 46 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502168 ER PT J AU Lucero, DA Behl, YK Brown, GO Budge, KG Dunn, M Gillow, JB Francis, AJ Papenguth, HW AF Lucero, DA Behl, YK Brown, GO Budge, KG Dunn, M Gillow, JB Francis, AJ Papenguth, HW TI Laboratory evaluation of colloid transport under simulated subsurface conditions at the waste isolation pilot plant (WIPP) .2. Large-scale-intact-core column flow experiments. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. OKLAHOMA STATE UNIV,STILLWATER,OK 74078. BROOKHAVEN NATL LAB,UPTON,NY 11973. SCIRES,ALBUQUERQUE,NM 87122. RI Brown, Glenn/H-4354-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 46 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502812 ER PT J AU Ocko, BM AF Ocko, BM TI Halide adlayers: From lattice gasses to incommensurate structures. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. UNIV ULM,DEPT ELECTROCHEM,D-89069 ULM,GERMANY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 46 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501221 ER PT J AU Stohl, FV Diegert, KV Goodnow, DC AF Stohl, FV Diegert, KV Goodnow, DC TI Evaluation of fine-particle size catalysts using bituminous and subbituminous coals SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROC RES DEPT 6212,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 46 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501857 ER PT J AU Rao, KRPM Huggins, FE Huffman, GP Stohl, FV AF Rao, KRPM Huggins, FE Huffman, GP Stohl, FV TI Mossbauer investigation of materials used in Sandia's DCL Catalyst Testing Program SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV KENTUCKY,CFFLS,LEXINGTON,KY 40506. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI Huggins, Frank/A-8861-2009 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 47 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501858 ER PT J AU Strietelmeier, BA Gillow, JB Dodge, CJ PansoyHjelvik, ME Kraus, SM Leonard, PA Triay, IR Francis, AJ Papenguth, HW AF Strietelmeier, BA Gillow, JB Dodge, CJ PansoyHjelvik, ME Kraus, SM Leonard, PA Triay, IR Francis, AJ Papenguth, HW TI Toxicity of actinides to bacterial strains isolated from the waste isolation pilot plant (WIPP) environment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 47 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502813 ER PT J AU Zhou, FM AF Zhou, FM TI Analyses of metals and porphyrins by electrospray mass spectrometry, inductively coupled plasma-mass spectrometry and stripping voltammetry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV WISCONSIN,DEPT CHEM,EAU CLAIRE,WI 54702. OAK RIDGE NATL LAB,CHEM & ANALYT SCI DIV,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 47 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501987 ER PT J AU Larimer, FW Lu, TYS Stringer, CD AF Larimer, FW Lu, TYS Stringer, CD TI Construction, purification, and characterization of recombinant D-ribulose-5-phosphate 3-epimerase from Spinacia oleracea. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,PROT ENGN PROGRAM,DIV BIOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 48 EP BIOL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500422 ER PT J AU Pruski, M AF Pruski, M TI Study of structural units in glassy and crystalline xNa(2)S+(1-x)B2S3 by MAS and 2D-MQ MAS B-11 NMR. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 48 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502085 ER PT J AU Yelton, WG Behl, YK Kelly, JW Dunn, M Gillow, JB Francis, AJ Papenguth, HW AF Yelton, WG Behl, YK Kelly, JW Dunn, M Gillow, JB Francis, AJ Papenguth, HW TI Laboratory evaluation of colloidal actinide transport at the waste isolation pilot plant (WIPP) .1. Crushed-dolomite column flow-experiments SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. SCIRES,ALBUQUERQUE,NM 87122. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 48 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502814 ER PT J AU Bond, AH Mizera, J Choppin, GR Moore, RC AF Bond, AH Mizera, J Choppin, GR Moore, RC TI Interactions of magnesium with carboxylate ligands at high ionic strengths. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 49 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502815 ER PT J AU Grittini, C Romeo, GA Fernando, Q Korte, NE AF Grittini, C Romeo, GA Fernando, Q Korte, NE TI Complete dechlorination of pentachlorophenol SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV ARIZONA,DEPT CHEM,TUCSON,AZ 85721. OAK RIDGE NATL LAB,GRAND JCT,CO 81503. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 49 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501676 ER PT J AU Chen, JF Choppin, GR Moore, RC AF Chen, JF Choppin, GR Moore, RC TI Complexation of Am(III) by EDTA in NaCl solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 51 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502817 ER PT J AU Harpel, MR Hartman, FC AF Harpel, MR Hartman, FC TI Proton transfer reactions of ribulose 1,5-bisphosphate (RuBP) carboxylase/oxygenase. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV BIOL,PROT ENGN PROGRAM,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 51 EP BIOL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500425 ER PT J AU Moore, RC Novak, CF AF Moore, RC Novak, CF TI A thermodynamic model for acetate complexation with Am3+, Th4+, and UO22+ SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 52 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502818 ER PT J AU Choppin, GR Pokrovsky, OS Moore, RC AF Choppin, GR Pokrovsky, OS Moore, RC TI Neptunyl (V) complexation with EDTA in solutions of sodium chloride SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 54 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502820 ER PT J AU Turesky, RJ Welti, DH Fay, LB AF Turesky, RJ Welti, DH Fay, LB TI Interspecies metabolism of heterocyclic aromatic amines. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NESTLE RES CTR,CH-1000 LAUSANNE 26,SWITZERLAND. UNIV YORK,JACK BIRCH UNIT ENVIRONM CARCINOGENESIS,YORK YO1 5DD,N YORKSHIRE,ENGLAND. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 55 EP TOXI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501091 ER PT J AU Hamilton, MA Thomson, S AF Hamilton, MA Thomson, S TI Phytoextraction of selenium from refinery wastewater. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 56 EP AGRO PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500191 ER PT J AU Rothenberger, KS Cugini, AV Thompson, RL AF Rothenberger, KS Cugini, AV Thompson, RL TI Polyethylene degradation in a coal liquefaction environment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH,PA 15236. OAK RIDGE INST SCI & ENGN,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 56 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501866 ER PT J AU Eskay, TP Britt, PF Buchanan, AC AF Eskay, TP Britt, PF Buchanan, AC TI Decarboxylation of coal model compounds under liquefaction conditions: Does decarboxylation lead to retrograde reactions? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 57 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501867 ER PT J AU Gong, M Li, H AF Gong, M Li, H TI Determination of chemical speciations of cerium in nuclear waste glasses SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 58 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500304 ER PT J AU Dixon, DA AF Dixon, DA TI Computational chemistry and the prediction of thermochemical and thermophysical properties. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 59 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501445 ER PT J AU Kelley, SS Davis, MF Myers, MD AF Kelley, SS Davis, MF Myers, MD TI Hydrogen bonding in cellulose ester blends SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,IND TECHNOL DIV,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 59 EP CELL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500606 ER PT J AU Kolsky, KL Mausner, LF Srivastava, SC AF Kolsky, KL Mausner, LF Srivastava, SC TI Reactor production of Sc-47 at BNL. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 60 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502826 ER PT J AU Concannon, BA Koons, JM Wind, RA Wuthier, RE Ellis, PD AF Concannon, BA Koons, JM Wind, RA Wuthier, RE Ellis, PD TI Determination of the initial species in bone formation using factor analysis and solid state P-31 NMR. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV S CAROLINA, DEPT CHEM & BIOCHEM, COLUMBIA, SC 29208 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 61 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502098 ER PT J AU Kirkpatrick, RJ Kim, Y AF Kirkpatrick, RJ Kim, Y TI NMR investigations of the adsorption of metals on oxide and silicate mineral surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV ILLINOIS,DEPT GEOL,URBANA,IL 61801. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 62 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502099 ER PT J AU Mirzadeh, S Kennel, SJ AF Mirzadeh, S Kennel, SJ TI Optimizations of radiolabeling of immunoproteins with Bi-213. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV HLTH SCI RES,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. NR 0 TC 1 Z9 1 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 62 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502828 ER PT J AU Zhang, J Fulton, JL AF Zhang, J Fulton, JL TI Micellization of sodium dodecyl sulfate revealed by fluorescence spectroscopy SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, CHEM SEPARAT & SLURRY PROC GRP, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 62 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500307 ER PT J AU Koch, V AF Koch, V TI Large soft dilepton production in ultrarelativistic heavy ion collisions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 64 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502830 ER PT J AU Swanson, BI Li, DQ AF Swanson, BI Li, DQ TI Cyclodextrin-based microsensor for volatile organic compounds. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 64 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502101 ER PT J AU Gardner, TJ McLaughlin, LJ Sandoval, RS AF Gardner, TJ McLaughlin, LJ Sandoval, RS TI Support chemistry, surface area, and preparation effects on sulfided NiMo catalyst activity SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROC RES DEPT,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 65 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501875 ER PT J AU Grate, JW Kaganove, SN Patrash, SJ AF Grate, JW Kaganove, SN Patrash, SJ TI Polymer-coated surface acoustic wave sensor arrays for organic vapor detection SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. EIGENVECTOR RES INC, MANSON, WA 98831 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 65 EP IEC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502102 ER PT J AU Newton, MD AF Newton, MD TI Electronic coupling in long-range electron transfer SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 66 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501452 ER PT J AU Stankus, P AF Stankus, P TI Production of direct photons in high-energy nuclear collisions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 66 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502832 ER PT J AU KinderGeiger, K AF KinderGeiger, K TI Quantum kinetics and parton cascades in high density QCD SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 67 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502833 ER PT J AU Brooks, ML AF Brooks, ML TI The PHENIX experiment at RHIC SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,GRP P25,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 70 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502835 ER PT J AU Singer, B Hang, B Chenna, A AF Singer, B Hang, B Chenna, A TI Enzymological repair of exocyclic DNA adducts formed by environmental carcinogens. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DONNER LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 70 EP TOXI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501106 ER PT J AU Hall, T AF Hall, T TI Probing the structure of the early universe with the solenoidal tracker at RHIC (STAR) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 71 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502836 ER PT J AU Beavis, D AF Beavis, D TI The BRAHMS experiment at RHIC. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 73 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502837 ER PT J AU Shore, JS DePaul, SM Ernst, M Pines, A AF Shore, JS DePaul, SM Ernst, M Pines, A TI Double resonance and silicon-29 two-dimensional NMR of minerals. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 S DAKOTA STATE UNIV,DEPT CHEM,BROOKINGS,SD 57007. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Ernst, Matthias/A-6732-2010 OI Ernst, Matthias/0000-0002-9538-6086 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 73 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502110 ER PT J AU Geacintov, NE Li, B Tsao, H Cosman, M Mao, B Xu, R Dwarakanath, S Liu, T Yang, C Amin, S AF Geacintov, NE Li, B Tsao, H Cosman, M Mao, B Xu, R Dwarakanath, S Liu, T Yang, C Amin, S TI Structural and biochemical characteristics of site-specific and stereochemically defined PAH diol epoxide-oligonucleotide adducts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NYU,DEPT CHEM,NEW YORK,NY 10003. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. AMER HLTH FDN,VALHALLA,NY 10595. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 74 EP TOXI PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501110 ER PT J AU Saljoughian, M Morimoto, H Williams, PG Than, C AF Saljoughian, M Morimoto, H Williams, PG Than, C TI New tritium labelling reagents and techniques. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY NATL LAB,NATL TRITIUM LABELLING FACIL,BERKELEY,CA 94720. LAWRENCE BERKELEY NATL LAB,BIOL STRUCT DIV,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 74 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502838 ER PT J AU Berrie, CL Longfellow, CA Suits, AG Lee, YT AF Berrie, CL Longfellow, CA Suits, AG Lee, YT TI The infrared multiphoton dissociation of hexafluoroacetone SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 76 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900580 ER PT J AU Haustein, PE AF Haustein, PE TI Nuclear stimulated desorption: Relevance to remediation of high-level radioactive waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 78 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502842 ER PT J AU Wedman, DE Nelson, TO Weisbrod, KR AF Wedman, DE Nelson, TO Weisbrod, KR TI Some chemistry of the electrolytic decontamination process SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 80 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502844 ER PT J AU Foster, RS Haberman, CB Hazard, GM AF Foster, RS Haberman, CB Hazard, GM TI Navigating your way through the National Library of Medicines TEHIP files via the Internet. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ORISE,EDUC & TRAINING DIV,OAK RIDGE,TN 37831. NATL LIB MED,DIV SPECIALIZED INFORMAT,BETHESDA,MD 20894. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 82 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501709 ER PT J AU Weiner, RF Hobart, DE Tait, CD Clark, DL AF Weiner, RF Hobart, DE Tait, CD Clark, DL TI The role of plutonium solubility and speciation in the waste isolation pilot plant (WIPP). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. SPEC INC,RE,ALBUQUERQUE,NM 87110. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 83 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502847 ER PT J AU Stevens, MJ AF Stevens, MJ TI Simulation of polyelectrolytes and charged colloids in solution SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 86 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501261 ER PT J AU Wruck, DA Palmer, CEA Silva, RJ AF Wruck, DA Palmer, CEA Silva, RJ TI Actinide speciation in elevated-temperature aqueous solutions by laser photoacoustic spectroscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 3 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 88 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502852 ER PT J AU Rai, D Felmy, AR Sterner, SM Rao, LF AF Rai, D Felmy, AR Sterner, SM Rao, LF TI Aqueous speciation and solubilities of tetravalent actinide hydrous oxides in concentrated Cl, SO4, and CO3 solutions: Challenges and progress SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 89 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502853 ER PT J AU AlMahamid, I Becraft, K Carpenter, SA Hakem, N Gatti, R AF AlMahamid, I Becraft, K Carpenter, SA Hakem, N Gatti, R TI Solubility of neptunium(V) in-dilute through concentrated K-Na-Cl-CO3 electrolytes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. SANDIA NATL LABS,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 90 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502854 ER PT J AU Turteltaub, KW AF Turteltaub, KW TI Accelerator mass spectrometry (AMS) in toxicology and carcinogenesis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,MOL & STRUCT BIOL DIV,LIVERMORE,CA 94551. LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 90 EP TOXI PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501126 ER PT J AU Yang, H Lian, T Asplund, M Bromberg, SE Harris, CB AF Yang, H Lian, T Asplund, M Bromberg, SE Harris, CB TI Femtosecond infrared studies of solvation by directly probing the solvent SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 90 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900594 ER PT J AU Lian, T Bromberg, SE Yang, H Bergman, RG Harris, CB AF Lian, T Bromberg, SE Yang, H Bergman, RG Harris, CB TI Femtosecond IR studies of alkane C-H bond activation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 91 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900595 ER PT J AU Wolery, TJ Jackson, KJ AF Wolery, TJ Jackson, KJ TI Pitzer and SIT activity coefficient models for aqueous U(VI) hydrolysis in NaCl and NaClO4. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. SANDIA NATL LABS,LIVERMORE,CA 94550. RI jackson, Kenneth/E-2236-2013 OI jackson, Kenneth/0000-0003-4231-3809 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 91 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502855 ER PT J AU You, H Nagy, Z AF You, H Nagy, Z TI Place exchange during surface oxidation of platinum SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. RI You, Hoydoo/A-6201-2011 OI You, Hoydoo/0000-0003-2996-9483 NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 91 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501266 ER PT J AU Roberts, KE Prussin, T Delgiudice, DF Palmer, CEA AF Roberts, KE Prussin, T Delgiudice, DF Palmer, CEA TI The solubility of UO2 CO3(S) in dilute through concentrated sodium chloride solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. SANDIA NATL LABS,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 92 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502856 ER PT J AU Meder, R Gallagher, S Mackie, K Boehler, H Meglen, R AF Meder, R Gallagher, S Mackie, K Boehler, H Meglen, R TI Characterisation of the chemical and physical properties of Pinus radiata timber via PCA/PLS modelling of spectroscopic data. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NEW ZEALAND FOREST RES INST,ROTORUA,NEW ZEALAND. IAF,FACHHSCH REUTLINGEN,REUTLINGEN,GERMANY. NATL RENEWABLE ENERGY LAB,GOLDEN,CO. RI Meder, Roger/A-7071-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 93 EP CELL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500640 ER PT J AU Novak, CF Moore, RC AF Novak, CF Moore, RC TI Thermodynamic models for estimating actinide solubilities for the waste isolation pilot plant (WIPP) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 93 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502857 ER PT J AU Rao, LF Rai, D Felmy, AR Novak, CF AF Rao, LF Rai, D Felmy, AR Novak, CF TI Solubility and thermodynamic modeling of trivalent lanthanides and actinides in mixed electrolyte solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 94 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502858 ER PT J AU Curtiss, LA AF Curtiss, LA TI Computational methods for calculation of accurate bond energies, electron affinities, and ionization energies. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,CHEM TECHNOL MAT SCI DIV,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 95 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501481 ER PT J AU Buchanan, AC Britt, PF Struss, JA AF Buchanan, AC Britt, PF Struss, JA TI Investigation of the mechanisms involved in lignin maturation. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,CHEM & ANALYT SCI DIV,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 96 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502036 ER PT J AU Francis, AJ Papenguth, HW AF Francis, AJ Papenguth, HW TI Studies of the role of microorganisms in colloid facilitated transport of actinides in brine under waste isolation pilot plant (WIPP) test conditions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 96 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502860 ER PT J AU Torretto, PC Zhao, PH Palmer, CEA AF Torretto, PC Zhao, PH Palmer, CEA TI Pu(IV)-colloid formation: A solubility approach. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. SANDIA NATL LABS,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 97 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502861 ER PT J AU Papenguth, HW AF Papenguth, HW TI Assessment of the potential impact of colloidal actinides on the performance of the waste isolation pilot plant (WIPP). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 98 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502862 ER PT J AU Richmann, MK Reed, DT AF Richmann, MK Reed, DT TI Reduction of U(VI), Np(VI), and Pu(VI) by WIPP-relevant organic complexants SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 99 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502863 ER PT J AU Birnbaum, ER Douglas, HM Sauer, NN AF Birnbaum, ER Douglas, HM Sauer, NN TI Metal binding with modified dendrimer complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 100 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502221 ER PT J AU Affleck, RL Ambrose, WP Goodwin, PM Keller, RA Schecker, JA Wu, M AF Affleck, RL Ambrose, WP Goodwin, PM Keller, RA Schecker, JA Wu, M TI Efficient single molecule detection and single molecule photochemistry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 101 EP ANYL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500342 ER PT J AU Moore, RC AF Moore, RC TI A thermodynamic model for citrate complexation with Am3+, Th4+, and UO22+ SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 101 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502865 ER PT J AU Runde, WH Clark, DL Conradson, SD Eichhorn, BW Neu, MP Palmer, PD Reilly, SD Tait, CD AF Runde, WH Clark, DL Conradson, SD Eichhorn, BW Neu, MP Palmer, PD Reilly, SD Tait, CD TI Hexavalent actinyl solids formed in highly concentrated sodium chloride solution. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 102 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502866 ER PT J AU Felmy, AR Rai, D Serne, RJ Sterner, SM Mason, MJ Martin, PFC AF Felmy, AR Rai, D Serne, RJ Sterner, SM Mason, MJ Martin, PFC TI An aqueous thermodynamic model for Th(IV) in mixed electrolyte systems: Application to synthetic WIPP brines. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 103 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502867 ER PT J AU Karraker, DG AF Karraker, DG TI Plutonium(IV) solubility studies in Savannah River site high-level waste supernate SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SAVANNAH RIVER TECHNOL CTR,CHEM & HYDROGEN TECHNOL SECT,AIKEN,SC 29808. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 104 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502868 ER PT J AU Stewart, AJ Sparks, BJ Carder, JP Sumner, JR AF Stewart, AJ Sparks, BJ Carder, JP Sumner, JR TI Constructed wetlands design for enhanced phytoremediation of effluents SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 104 EP AGRO PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500239 ER PT J AU Yeung, ES Lillard, SJ Tong, W Xu, XH AF Yeung, ES Lillard, SJ Tong, W Xu, XH TI Analytical instrumentation in the fourth dimension. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 104 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500345 ER PT J AU Jamison, GM Loy, DA Opperman, KA Beach, JV AF Jamison, GM Loy, DA Opperman, KA Beach, JV TI New hybrid polysilane/polysiloxane nanocomposites SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 105 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900958 ER PT J AU Luo, X McCreary, EI Atencio, JH AF Luo, X McCreary, EI Atencio, JH TI Bubble chamber as a trace chemical detector SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 105 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900609 ER PT J AU Reed, DT Wygmans, DG AF Reed, DT Wygmans, DG TI Stability/solubility of U(VI), Np(VI), and Pu(VI) in synthetic WIPP brine SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 105 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502869 ER PT J AU Sigman, ME Barbas, JT Dabestani, R AF Sigman, ME Barbas, JT Dabestani, R TI Contrasting mechanisms of photochemical oxidation at silica/air interfaces: 1-methoxynaphthalene and phenanthrene. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 105 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501732 ER PT J AU Janecky, DR Runde, WH Jackson, K AF Janecky, DR Runde, WH Jackson, K TI Thermodynamic modeling of An(V) and (VI) solubility in brine solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 106 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502870 ER PT J AU Neu, MP Clark, DL Conradson, SD Newton, TW Palmer, PD Reilly, SD Runde, WH Tait, CD AF Neu, MP Clark, DL Conradson, SD Newton, TW Palmer, PD Reilly, SD Runde, WH Tait, CD TI Hexavalent actinide speciation in carbonate containing perchlorate and chloride solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 107 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502871 ER PT J AU Harding, LB AF Harding, LB TI Potential surfaces for reactions of H and Cl with HCN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 108 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900612 ER PT J AU Feng, X Freeman, CJ Luey, J Li, H Schweiger, MJ Gong, M AF Feng, X Freeman, CJ Luey, J Li, H Schweiger, MJ Gong, M TI Chemical behavior of P, S, Cl, F, and Cr in borosilicate nuclear waste glasses SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 111 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501738 ER PT J AU Reynolds, JG Burnham, AK Wallman, H AF Reynolds, JG Burnham, AK Wallman, H TI Kinetic analysis and characterization of paper and paper residues produced by a hydrothermal pretreatment process for municipal solid wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 111 EP CELL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500658 ER PT J AU Strietelmeier, BA Sebring, RJ Gillow, JB Dodge, CJ PansoyHjelvik, ME Kraus, SM Leonard, PA Triay, IR Francis, AJ Papenguth, HW AF Strietelmeier, BA Sebring, RJ Gillow, JB Dodge, CJ PansoyHjelvik, ME Kraus, SM Leonard, PA Triay, IR Francis, AJ Papenguth, HW TI Plutonium interaction with a bacterial strain isolated from the waste isolation pilot plant (WIPP) environment SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. BROOKHAVEN NATL LAB,UPTON,NY 11973. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 112 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501739 ER PT J AU Gohdes, JW Reilly, SD Pecha, AW Neu, MP AF Gohdes, JW Reilly, SD Pecha, AW Neu, MP TI Solution thermodynamics and structures of biscatecholamide complexes of Fe(III) and U(VI). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 113 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502234 ER PT J AU Wagner, AF Harding, LB Robertson, SH Wardlaw, DM AF Wagner, AF Harding, LB Robertson, SH Wardlaw, DM TI Anharmonic effects in the recombination of free radicals SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV LEEDS,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND. QUEENS UNIV,KINGSTON,ON K7L 3N6,CANADA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 114 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900618 ER PT J AU Melius, CF AF Melius, CF TI Application of the BAC-MP 1 method and its variations in determining thermochemical properties of molecules. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 115 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501500 ER PT J AU Wu, RL Unkefer, CJ Silks, LA AF Wu, RL Unkefer, CJ Silks, LA TI Synthesis of D-[U-C-13]glucal, D-[U-C-13]galactal, and L-[U-C-13]fucose for NMR structure studies of oligosaccharides SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 116 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900116 ER PT J AU Agblevor, FA Davis, MF AF Agblevor, FA Davis, MF TI Rapid characterization of lignocellulosic feedstocks for fuels and chemicals: Molecular beam mass spectrometric approach. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 117 EP CELL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500664 ER PT J AU Hauck, JT Olson, GJ Scierka, SJ Perry, MB Ataai, MM AF Hauck, JT Olson, GJ Scierka, SJ Perry, MB Ataai, MM TI Effects of simulated flue gas on growth of microalgae. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. CARNEGIE MELLON UNIV,CARNEGIE MELLON RES INST,PITTSBURGH,PA 15213. LITTLE BEAR LABS INC,RED LODGE,MT 59068. UNIV PITTSBURGH,DEPT CHEM ENGN,PITTSBURGH,PA 15261. NR 0 TC 4 Z9 4 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 118 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501926 ER PT J AU Hay, PJ AF Hay, PJ TI Theoretical studies of molecular processes in catalysis and materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 121 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501506 ER PT J AU Goode, SR AF Goode, SR TI Choosing internal standard elements in ICP-AES. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV S CAROLINA,DEPT CHEM & BIOCHEM,COLUMBIA,SC 29223. SAVANNAH RIVER TECHNOL CTR,ANALYT DEV SECT,AIKEN,SC 29808. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 122 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500363 ER PT J AU VanPelt, CE Choppin, GR AF VanPelt, CE Choppin, GR TI Actinide complexation studies with P2W17O6110- and P8W4818440- anions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 122 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502243 ER PT J AU Bowman, LE AF Bowman, LE TI Supercritical fluids: Science and technology under high pressure SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 127 EP ANYL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91500368 ER PT J AU Stouch, TR Bassolino, D Shen, LY Plimpton, S Pollock, R AF Stouch, TR Bassolino, D Shen, LY Plimpton, S Pollock, R TI Large-scale, longtime molecular dynamics simulations of lipid bilayers: Permeation and protein structure SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BRISTOL MYERS SQUIBB PHARMACEUT RES INST,PRINCETON,NJ 08543. SANDIA NATL LABS,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 127 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900630 ER PT J AU Rayner, M Nichols, P AF Rayner, M Nichols, P TI Rapid method for extraction of the faecal sterol coprostanol using supercritical fluid carbon dioxide SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MICROBIAL INSIGHTS INC,HOBART,TAS 7000,AUSTRALIA. UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,KNOXVILLE,TN. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Nichols, Peter/C-5128-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 128 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501755 ER PT J AU Holder, GD Warzinski, RP AF Holder, GD Warzinski, RP TI Formation and growth of CO2 clathrate hydrate shells around gas bubbles or liquid drops SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 134 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501942 ER PT J AU Jackson, NB Nenoff, TM Kohler, SD Thoma, SG AF Jackson, NB Nenoff, TM Kohler, SD Thoma, SG TI Characteristics of acidic zirconium/titanium phosphate catalysts synthesized by sol gel methods SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ADV ENERGY TECHNOL CTR,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 135 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501310 ER PT J AU Chesko, JD Lee, YT AF Chesko, JD Lee, YT TI Unimolecular decay of substituted aromatics SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 142 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900645 ER PT J AU Dyer, RB Williams, S Woodruff, WH AF Dyer, RB Williams, S Woodruff, WH TI The earliest events in protein folding: Helix dynamics in proteins and model peptides SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 150 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900653 ER PT J AU Holt, BD Sturchio, NC AF Holt, BD Sturchio, NC TI High temperature method for conversion of chlorinated organics to CH3Cl and CO2 for isotopic analyses of chlorine and carbon SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 154 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501781 ER PT J AU Ramsey, JM AF Ramsey, JM TI Biochemical assays on microfabricated devices SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 154 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900657 ER PT J AU Woolley, AT Northrup, MA Mathies, RA AF Woolley, AT Northrup, MA Mathies, RA TI Microfabricated integrated DNA analysis systems SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract ID ARRAY ELECTROPHORESIS CHIPS C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,DIV ENGN RES,LIVERMORE,CA 94551. NR 3 TC 2 Z9 2 U1 2 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 155 EP PHYS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900658 ER PT J AU Cowin, JP Wang, H Iedema, MJ AF Cowin, JP Wang, H Iedema, MJ TI Low energy water ion deposition and collision-induced dissociation on Pt(111) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB, RICHLAND, WA 99352 USA. UNIV COLORADO, DEPT CHEM, BOULDER, CO 80309 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 159 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900662 ER PT J AU Carrado, KA Marshall, CL Brenner, JR Song, K Tomczyk, N AF Carrado, KA Marshall, CL Brenner, JR Song, K Tomczyk, N TI Mesoporous materials derived from synthetic organo-clays as novel hydrodesulfurization catalysts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM 200,ARGONNE,IL 60439. RI Marshall, Christopher/D-1493-2015 OI Marshall, Christopher/0000-0002-1285-7648 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 165 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501340 ER PT J AU Wang, JX Adzic, RR AF Wang, JX Adzic, RR TI Structure of halide and metal adlayers in the course of electrocatalytic reactions: Oxygen reduction and hydrogen evolution. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV CHEM SCI,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 169 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501344 ER PT J AU Bash, PA Ho, LL MacKerell, AD Levine, D Hallstrom, P AF Bash, PA Ho, LL MacKerell, AD Levine, D Hallstrom, P TI Progress toward chemical accuracy in the computer simulation of condensed phase reactions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. UNIV MARYLAND,SCH PHARM,BALTIMORE,MD 21230. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 170 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501555 ER PT J AU Judson, R AF Judson, R TI Genetic algorithms for protein structure prediction. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 179 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501564 ER PT J AU Bergman, RG AF Bergman, RG TI Reversing chemical inertia: Activating carbon-hydrogen bonds with metals SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 183 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900183 ER PT J AU Perry, DL AF Perry, DL TI Applications of synchrotron x-ray fluorescence microprobe techniques to photochromic materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 192 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502313 ER PT J AU Mungall, WS Britt, PF Buchanan, AC Hagaman, EW AF Mungall, WS Britt, PF Buchanan, AC Hagaman, EW TI Synthesis of substituted derivatives of poly(m-xylylene) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. HOPE COLL,DEPT CHEM,HOLLAND,MI 49423. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 197 EP ORGN PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900197 ER PT J AU Tang, Q Harrata, KA Lee, CS AF Tang, Q Harrata, KA Lee, CS TI On-line capillary isoelectric focusing electrospray mass spectrometry for protein characterization SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 197 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900700 ER PT J AU McBreen, J Mukerjee, S AF McBreen, J Mukerjee, S TI In situ X-ray absorption studies of nanoparticles of Pt and Pt alloys. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 204 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501377 ER PT J AU Pines, A AF Pines, A TI Nuclear spin: Fifty years of ups and downs SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 216 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900718 ER PT J AU Cahill, PA Rohlfing, CM Henderson, CC Assink, RA Gillen, KT Jacobs, SJ AF Cahill, PA Rohlfing, CM Henderson, CC Assink, RA Gillen, KT Jacobs, SJ TI Hydrogenated fullerenes: Quantitative comparison of theory and experiment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. SANDIA NATL LABS,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 221 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501606 ER PT J AU Weber, CF Egan, BZ AF Weber, CF Egan, BZ TI Convergence analysis of the equilibrium code SOLGASMIX SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 222 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501607 ER PT J AU Wexler, DS Kochendoerfer, GG Lin, SW Wang, Q Mathies, CV AF Wexler, DS Kochendoerfer, GG Lin, SW Wang, Q Mathies, CV TI Analysis of the role of nonstationary vibrational states in condensed phase photochemistry: The rhodopsin paradigm SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 231 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900733 ER PT J AU Oprea, TI AF Oprea, TI TI The hypothetical world of COMFA and model validation. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RI Oprea, Tudor/A-5746-2011 OI Oprea, Tudor/0000-0002-6195-6976 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 234 EP COMP PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91501619 ER PT J AU Tan, WH Yeung, ES Haydon, PG AF Tan, WH Yeung, ES Haydon, PG TI Imaging neurotransmitter release kinetics in living cells SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32606. IOWA STATE UNIV,AMES LAB,US DOE,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV,DEPT ZOOL & GENET,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 239 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900740 ER PT J AU Kay, B AF Kay, B TI Molecular beam studies of atomic hydrogen with clean and adsorbate covered metal surfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 246 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900747 ER PT J AU Perry, DL Schlueter, EM AF Perry, DL Schlueter, EM TI Use of x-ray fluorescence microprobe and x-ray photoelectron spectroscopy to study variations in bulk and surface chemistry of minerals. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 252 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502373 ER PT J AU Sauer, BB Gochanour, CR VanAlsten, JG Wang, APY AF Sauer, BB Gochanour, CR VanAlsten, JG Wang, APY TI Peel tests and neutron reflectivity studies of interface widths in thin films of poly(urethane) block copolymers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 DUPONT CO INC,CENT RES & DEV,WILMINGTON,DE 19880. ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 255 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901533 ER PT J AU Shen, YR AF Shen, YR TI Vibrational spectroscopic studies of liquid interfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 285 EP PMSE PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901563 ER PT J AU Small, JH Saunders, RS Kent, MS AF Small, JH Saunders, RS Kent, MS TI Amine-containing block copolymers: Long-term adhesion promoters and corrosion resistant coatings. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ORGAN MAT PROC DEPT,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 293 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901142 ER PT J AU Hess, AC Lin, ZJ Clerc, DG Jaffe, JE AF Hess, AC Lin, ZJ Clerc, DG Jaffe, JE TI Gaussian basis density functional theory for systems periodic in two or three dimensions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 295 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900796 ER PT J AU Yarmoff, JA AF Yarmoff, JA TI Stimulated desorption of F+ and Cl+ from Si surfaces: Initial excitations and final-state effects. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 305 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900806 ER PT J AU DePristo, AE Kelchner, CL Zhu, L AF DePristo, AE Kelchner, CL Zhu, L TI Simulations of large metallic systems: Film deposition and bimetallic clusters SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 330 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900831 ER PT J AU Orlando, T Kimmel, G AF Orlando, T Kimmel, G TI State-resolved studies of low-energy (5-50 eV) electron- and vacuum ultraviolet photon-stimulated reactions in amorphous ice. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 333 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900834 ER PT J AU Corrales, LR Keefer, K AF Corrales, LR Keefer, K TI Phase equilibria and higher order critical points in silicate melt solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 342 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900840 ER PT J AU Dixon, DA Nichols, JA Harrison, RJ Kendall, RA Dupuis, M AF Dixon, DA Nichols, JA Harrison, RJ Kendall, RA Dupuis, M TI Computational chemistry issues for materials design and life cycle analysis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 353 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900851 ER PT J AU Steckle, WP AF Steckle, WP TI Carbon foams prepared from hypercrosslinked polymer foams SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,MST 7,MS E 549,LOS ALAMOS,NM 87455. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 356 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901205 ER PT J AU Wang, B Wasielewski, MR AF Wang, B Wasielewski, MR TI Synthesis and characterization of metal ion recognition induced conjugated polymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT CHEM,EVANSTON,IL 60208. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 361 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900360 ER PT J AU Guest, MF Sherwood, P Fletcher, GD AF Guest, MF Sherwood, P Fletcher, GD TI Application of DFT and MP2 to the structures of transition metal complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 CCLRC, DARESBURY LAB, WARRINGTON WA4 4AD, CHESHIRE, ENGLAND. PACIFIC NW LAB, EMSL, RICHLAND, WA 99352 USA. RI Sherwood, Paul/B-9033-2012 OI Sherwood, Paul/0000-0002-4611-5052 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 367 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502487 ER PT J AU Morita, DK Pesiri, DR Tumas, W AF Morita, DK Pesiri, DR Tumas, W TI Transition metal-catalyzed selective oxidation in carbon dioxide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN,CHAPEL HILL,NC 27599. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 369 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502489 ER PT J AU Feng, SG Gross, MF Burk, MJ Tumas, W AF Feng, SG Gross, MF Burk, MJ Tumas, W TI Asymmetric catalytic transformations in supercritical carbon dioxide SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. DUKE UNIV,DEPT CHEM,DURHAM,NC 27708. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 370 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502490 ER PT J AU Falvello, LR Hitchman, MA Palacio, F Pascual, I Schultz, AJ Stratemeier, H Young, DM AF Falvello, LR Hitchman, MA Palacio, F Pascual, I Schultz, AJ Stratemeier, H Young, DM TI Tunable molecular distortion in crystals with a supramolecular aggregate. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV ZARAGOZA,CSIC,DEPT QUIM INORGAN,E-50009 ZARAGOZA,SPAIN. UNIV ZARAGOZA,CSIC,INST CIENCIA MAT ARAGON,E-50009 ZARAGOZA,SPAIN. UNIV TASMANIA,DEPT CHEM,HOBART,TAS 7001,AUSTRALIA. ARGONNE NATL LAB,ARGONNE,IL 60439. RI Palacio, Fernando/A-1270-2013 OI Palacio, Fernando/0000-0002-6403-7270 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 396 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502516 ER PT J AU Small, JH Shea, KJ AF Small, JH Shea, KJ TI Preparation of bridged bis-germylates and germylate-siliconates: Unique model compounds for the synthesis of hypervalent polymers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. SANDIA NATL LABS,ORG 1812,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 401 EP INOR PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA915 UT WOS:A1996VA91502521 ER PT J AU Loy, DA Carpenter, JP Myers, SA Assink, RA Small, JH Greaves, J Shea, KJ AF Loy, DA Carpenter, JP Myers, SA Assink, RA Small, JH Greaves, J Shea, KJ TI Formation and polymerization of cyclic disilsesquioxanes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185. UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 422 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00901271 ER PT J AU Cooney, MJ Britt, PF Buchanan, AC AF Cooney, MJ Britt, PF Buchanan, AC TI Synthesis and flash vacuum pyrolysis of hydroxy-substituted phenethyl phenyl ethers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 439 EP ORGN PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900438 ER PT J AU Eskay, TP Britt, PF Buchanan, AC AF Eskay, TP Britt, PF Buchanan, AC TI Mechanism of the thermal decarboxylation of carboxybibenzyls. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 441 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900440 ER PT J AU Orji, CC Silks, LA AF Orji, CC Silks, LA TI Synthesis of N-15 and C-13 labeled DNA: A flexible synthetic route for incorporation of N-15 and C-13 labels in guanine and adenine of DNA. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 25 PY 1996 VL 212 BP 457 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA VB009 UT WOS:A1996VB00900456 ER PT J AU Masarik, J Reedy, RC AF Masarik, J Reedy, RC TI Gamma ray production and transport in Mars SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID GALACTIC COSMIC-RAYS; SPECTRA; SPECTROSCOPY; NEUTRONS; SIMULATION; SOLAR AB The elemental composition of the Martian surface can be determined by gamma ray spectroscopy from landers or orbiting spacecraft. We used the well-tested Los Alamos High Energy Transport (LAHET) Code System (LCS) to numerically simulate the galactic-cosmic-ray-induced processes producing secondary particles and gamma rays in Mars. For gamma ray lines, LCS was used only for the calculation of the particle fluxes in the Martian soil and atmosphere; these fluxes were then integrated with cross sections to calculate the production rates of gamma rays as a function of depth. The fluxes of gamma ray lines were then calculated both at the Martian surface and at an altitude of 378 km. The water content of the Martian soil and the atmospheric thickness were varied to establish the dependence of the particle distributions and gamma ray fluxes on these parameters. Most attention is devoted to gamma rays from neutron-induced reactions in the Martian soil, but contributions from the atmosphere, natural radioactivity, and from proton interactions are also mentioned. Our results are compared with those from previous studies. C1 LOS ALAMOS NATL LAB,ASTROPHYS & RADIAT MEASUREMENT GRP,LOS ALAMOS,NM 87545. OI Reedy, Robert/0000-0002-2189-1303 NR 63 TC 59 Z9 59 U1 1 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-PLANET JI J. Geophys. Res.-Planets PD AUG 25 PY 1996 VL 101 IS E8 BP 18891 EP 18912 DI 10.1029/96JE01563 PG 22 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA VE400 UT WOS:A1996VE40000002 ER PT J AU Foster I Kesselman, C Tuecke, S AF Foster, I Kesselman, C Tuecke, S TI The Nexus approach to integrating multithreading and communication SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Article ID SHARED-MEMORY MULTIPROCESSORS AB Lightweight threads have an important role to play in parallel systems: they can be used to exploit shared-memory parallelism, to mask communication and I/O latencies, to implement remote memory access, and to support task-parallel and irregular applications. In this paper, we address the question of how to integrate threads and communication in high-performance distributed-memory systems. We propose an approach based on global pointer and remote service request mechanisms, and explain how these mechanisms support dynamic communication structures, asynchronous messaging, dynamic thread creation and destruction, and a global memory model via interprocessor references. We also explain how these mechanisms can be implemented in various environments. Our global pointer and remote service request mechanisms have been incorporated in a runtime system called Nexus that is used as a compiler target for parallel languages and as a substrate for higher-level communication libraries. We report the results of performance studies conducted using a Nexus implementation; these results indicate that Nexus mechanisms can be implemented efficiently on commodity hardware and software systems. (C) 1996 Academic Press, Inc. C1 CALTECH, BECKMAN INST, PASADENA, CA 91125 USA. RP Foster I (reprint author), ARGONNE NATL LAB, DIV MATH & COMP SCI, ARGONNE, IL 60439 USA. OI Kesselman, Carl/0000-0003-0917-1562 NR 47 TC 104 Z9 104 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 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD AUG 25 PY 1996 VL 37 IS 1 BP 70 EP 82 DI 10.1006/jpdc.1996.0108 PG 13 WC Computer Science, Theory & Methods SC Computer Science GA VL778 UT WOS:A1996VL77800006 ER PT J AU Greenblatt, BJ Zanni, MT Neumark, DM AF Greenblatt, BJ Zanni, MT Neumark, DM TI Photodissociation dynamics of the I-2(-) anion using femtosecond photoelectron spectroscopy SO CHEMICAL PHYSICS LETTERS LA English DT Article ID I2-(CO2)N CLUSTER IONS; FREE-JET EXPANSION; RECOMBINATION DYNAMICS; IONIZATION SPECTROSCOPY; MOLECULAR-DYNAMICS; TRANSITION-STATE; I2; SPECTROMETER; RELAXATION; SPECTRA AB The photodissociation dynamics of the I-2(-) anion have been studied in real-time using femtosecond photoelectron spectroscopy. In this experiment, I-2(-) is excited to a dissociative electronic state with an ultrafast pump pulse, and the photoelectron spectrum of the dissociating anion is measured by photodetachment with a second, ultrafast probe pulse. The variation of the photoelectron spectrum with delay time enables one to monitor the dissociating anion from the initial Franck-Condon region of excitation out to the asymptotic region. Dissociation occurs on a time scale of 100 fs. The results are compared with quantum mechanical simulations using previously published potential energy curves for I-2(-). C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP Greenblatt, BJ (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Zanni, Martin/K-2707-2013; Neumark, Daniel/B-9551-2009 OI Neumark, Daniel/0000-0002-3762-9473 NR 31 TC 88 Z9 89 U1 0 U2 20 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 AUG 23 PY 1996 VL 258 IS 5-6 BP 523 EP 529 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VD441 UT WOS:A1996VD44100001 ER PT J AU LeCalvez, A Montant, S Freysz, E Ducasse, A Zhuang, XW Shen, YR AF LeCalvez, A Montant, S Freysz, E Ducasse, A Zhuang, XW Shen, YR TI Ultrashort orientational dynamics of liquid crystals in the smectic-A phase SO CHEMICAL PHYSICS LETTERS LA English DT Article ID INFRARED-SPECTROSCOPY; TRANSITION; REORIENTATION; ROTATION AB A femtosecond time-resolved optical Kerr effect experiment was carried out to study the reorientational motion of a series of cyanobiphenyl molecules around their long axis in the smectic-A phase, The Kerr effect was found to mainly result from the reorientation of the cyanobiphenyl core of the liquid crystal molecule. Three relaxation times were observed in the subpicosecond and picosecond range. They appear to be associated with libration and diffusive reorientations of chromophores of individual and paired molecules. The analysis on several temporal scales reveals the existence of strong molecular interactions within the smectic-A layers. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. RP LeCalvez, A (reprint author), UNIV BORDEAUX 1,CTR PHYS MOL OPT & HERTZIENNE,351 COURS LIBERAT,F-33405 TALENCE,FRANCE. NR 15 TC 12 Z9 12 U1 0 U2 1 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 AUG 23 PY 1996 VL 258 IS 5-6 BP 620 EP 625 DI 10.1016/0009-2614(96)00702-6 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VD441 UT WOS:A1996VD44100015 ER PT J AU Fornstedt, T Zhong, GM Guiochon, G AF Fornstedt, T Zhong, GM Guiochon, G TI Peak tailing and slow mass transfer kinetics in nonlinear chromatography SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE peak shape; non-linear chromatography; mass transfer; adsorption isotherms; kinetic studies ID PROFILES; PHASE AB Peak tailing has two main origins in chromatography: (i) heterogenous mass transfer kinetics, (ii) heterogenous thermodynamics with overloading of a nonlinear isotherm. The individual effects of each of these sources and the conditions under which they give rise to peak tailing are now well known. Often however, these different sources combine resulting in complex behavior. This situation is investigated in the case of an adsorbent whose surface is covered with two different types of adsorption sites. The first type of sites has a large specific surface area, a relatively weak adsorption energy and retention and fast mass transfer kinetics. The second type of sites covers a small proportion of the total surface area and has a strong retention and slow mass transfer kinetics. Tailing from different origins combine when the slow type of adsorption sites is operated under a certain degree of overloading, i.e., under nonlinear conditions. To model these phenomena, the transport-dispersive model was used with a modified solid film linear driving force model accounting for mass transfer kinetics on both types of sites. When the rate of mass transfer on the active sites is slow (k(2) less than or equal to 10 min(-1)), peak tailing of thermodynamic origin is negligible. When the kinetics is fast (k(2) greater than or equal to 100 min(-1)), heterogenous thermodynamics is the source of peak tailing. In the intermediate region (10 S interactions, inducing the formation of molybdenum sulfide films. The ZnMoS and CoMoS films were unreactive toward H-2 or D-2 under ultrahigh vacuum conditions. As gas-phase hydrogen atoms (D) impinged on the surfaces, gaseous hydrogen sulfide was formed. Thus, the slow step in the D-2.gas + S-solid --> D2Sgas reaction is the dissociation of molecular hydrogen. A good correlation exists between trends seen in the hydrodesulfurization (HDS) activity of ZnMoS and CoMoS catalysts and trends found for the sulfidation of Mo and hydrogenation of S in ZnMoS and CoMoS films. The systems that contain Co show the larger HDS activity, the stronger metal <----> metal interactions with a subsequent increase in the reactivity of Mp toward S-containing molecules, and the bigger tendency to create unsaturated Mo sites through the hydrogenation of Mo-bonded S atoms. C1 NATL UNIV SINGAPORE,DEPT CHEM,SINGAPORE 119260,SINGAPORE. RP Rodriguez, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Xu, Guo Qin/C-2077-2013; Hrbek, Jan/I-1020-2013 NR 83 TC 24 Z9 24 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 22 PY 1996 VL 100 IS 34 BP 14476 EP 14484 DI 10.1021/jp961185s PG 9 WC Chemistry, Physical SC Chemistry GA VD991 UT WOS:A1996VD99100030 ER PT J AU Thompson, MA AF Thompson, MA TI QM/MMpol: A consistent model for solute/solvent polarization. Application to the aqueous solvation and spectroscopy of formaldehyde, acetaldehyde, and acetone SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; DIFFERENTIAL-OVERLAP TECHNIQUE; WATER CLUSTERS (H2O)(N); AB-INITIO; SEMIEMPIRICAL METHODS; COMPUTER-SIMULATIONS; INTERMEDIATE NEGLECT; ABSORPTION-SPECTRA; CHEMICAL-REACTIONS; MEAN FORCE AB We present a hybrid quantum mechanical/molecular mechanical theory that consistently treats many-body polarization effects in the MM region (QM/MMpol). The method described here is based on our previous theory far single-point ground and excited states. Here we extend the formalism to include analytical gradients, making the approach useful for molecular dynamics (MD) simulations. Central to our development is a consistent treatment of the interaction of the MM polarizable dipoles with the full QM wave function in a fashion that allows for energy conservation in the MD. We present implementation details for NDDO semiempirical QM Hamiltonians of the MNDO type. We also present an analysis of the solvent and substituent effects on the spectroscopic blue shift of the n-pi* electronic excited state of a series of carbonyl-containing solutes: formaldehyde, acetaldehyde, and acetone. We use the AMI semiempirical Hamiltonian to treat the solute and the POL1 polarizable model for the solvent. For formaldehyde, we present optimized structures, binding energies; and MD results for CH2O/(H2O)(n) clusters (n = 1-6) and describe the effect of specific water/chromophore interactions. The MD results show that CH2O/(H2O)(3) exhibits the most favorable salvation with the solute and the three waters forming ringlike structures with near optimal hydrogen bonding interactions. The n = 3 cluster also has the largest solvent-induced blue shift of the clusters studied, with a value of 730 cm(-1) at 150 K. Aqueous bulk-phase MD simulations of formaldehyde, acetaldehyde, and acetone at 300 K show the average number of waters in the first salvation shell of the carbonyl oxygen is 1.2 (formaldehyde), 1.8 (acetaldehyde), and 2.2 (acetone). The induced dipole moments in the solutes are calculated as follows: +0.77 D (formaldehyde), +1.09 D (acetaldehyde), and +1.13 D(acetone). The simulation average solvent-induced blue shift in the vertical n-pi* electronic excited state of the three solutes is 1148 cm(-1) (formaldehyde),. 1531 cm(-1) (acetaldehyde), and 1607 cm(-1) (acetone). The acetone n-pi* blue-shift result is in good accord with experiment and provides a benchmark for assessing the accuracy of our prediction for the blue shifts of formaldehyde and acetaldehyde. We suggest the present formalism is the logical starting point for including more accurate ab initio approaches in QM/MM methods. RP Thompson, MA (reprint author), PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 60 TC 208 Z9 212 U1 0 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 22 PY 1996 VL 100 IS 34 BP 14492 EP 14507 DI 10.1021/jp960690m PG 16 WC Chemistry, Physical SC Chemistry GA VD991 UT WOS:A1996VD99100032 ER PT J AU LaCroix, LB Shadle, SE Wang, YN Averill, BA Hedman, B Hodgson, KO Solomon, EI AF LaCroix, LB Shadle, SE Wang, YN Averill, BA Hedman, B Hodgson, KO Solomon, EI TI Electronic structure of the perturbed blue copper site in nitrite reductase: Spectroscopic properties, bonding, and implications for the entatic/rack state SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID X-RAY-ABSORPTION; PLASTOCYANIN SINGLE-CRYSTALS; PARAMAGNETIC-RES PARAMETERS; MAGNETIC CIRCULAR-DICHROISM; CHARGE-TRANSFER TRANSITIONS; NITROUS-OXIDE REDUCTASE; RESONANCE RAMAN-SPECTRA; LIGAND K-EDGE; ACHROMOBACTER-CYCLOCLASTES; ACTIVE-SITE AB Low-temperature optical absorption, circular dichroism, magnetic circular dichroism, and sulfur K-edge X-ray absorption spectra have been measured for the green ''blue'' copper center (type 1) in Achromobacter cycloclastes nitrite reductase. Combined with density functional calculations, the results of these spectroscopies have been used to define the extremely ''perturbed'' electronic structure of this site relative to that of the prototypical ''classic'' site found in plastocyanin. Experimentally calibrated density functional calculations have been further used to determine the specific geometric distortions which generate the perturbed electronic structure. These studies indicate that the principal electronic structure changes in nitrite reductase, relative to plastocyanin, are a rotation of the Cu d(x2-y2) half-filled, highest occupied molecular orbital (HOMO) and an increase in the ligand field strength at the Cu center. The HOMO rotation increases the pseudo-sigma interaction and decreases the pi interaction of the cysteine (Cys) sulfur with Cu d(x2-y2). Furthermore, significant methionine (Met) sulfur character is mixed into the HOMO due to increased overlap with Cu d(x2-y2). These changes in Cu-ligand interactions result in the redistribution of absorption intensity in the charge transfer and ligand field transitions. Additionally, the new S(Met)-Cu interaction accounts for the unexpectedly high sulfur covalency in the HOMO. The increase in ligand field strength shifts all the d --> d transitions in nitrite reductase to similar to 1000 cm(-1) higher energy than their counterparts in plastocyanin, which accounts for the EPR spectral differences between the type 1 sites in these complexes. The geometric distortion primarily responsible for the electronic structure changes in nitrite reductase, relative to plastocyanin, is determined to involve a coupled angular movement of the Cys and Met residues toward a more flattened tetrahedral (toward square planar) structure. This movement is consistent with a tetragonal Jahn-Teller distortion resulting from the shorter Cu-S(Met) bond in nitrite reductase relative to plastocyanin. This increased Jahn-Teller distortion implies that the type 1 site is ''less entatic'' than that in plastocyanin. C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. UNIV VIRGINIA,DEPT CHEM,CHARLOTTESVILLE,VA 22901. STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. NR 94 TC 147 Z9 147 U1 0 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 21 PY 1996 VL 118 IS 33 BP 7755 EP 7768 DI 10.1021/ja961217p PG 14 WC Chemistry, Multidisciplinary SC Chemistry GA VD328 UT WOS:A1996VD32800015 ER PT J AU Daitch, CE Hampton, PD Duesler, EN Alam, TM AF Daitch, CE Hampton, PD Duesler, EN Alam, TM TI Selective binding of group IIIA and lanthanide metals by hexahomotrioxacalix[3]arene macrocycles SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID RAY CRYSTAL-STRUCTURES; ION COMPLEXES; COORDINATION CHEMISTRY; DIMETHYL-SULFOXIDE; CALIXARENES; CALIX<4>ARENES; EUROPIUM(III); ARYLOXIDE; INCLUSION; YTTRIUM AB The hexahomotrioxacalix[3]arene macrocycles 1 are observed to bind trivalent metals (Sc3+, Lu3+,Y3+, La3+) more strongly than alkali metal ions (Li+, Na+, K+). Complexes of macrocycle la with Lu(III) (3), Y(III) (4), and La(III) (5) have been structurally characterized to be mu-aryloxo-bridged dimers with the formula [M(L)(DMSO)](2) (M = Lu, Y, La; L = trianion of macrocycle 1a). Periodic trends in the structures and dynamic behavior of the complexes are discussed. C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,MAT AGING & RELIABIL BULK PROD,ALBUQUERQUE,NM 87185. NR 44 TC 35 Z9 35 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 21 PY 1996 VL 118 IS 33 BP 7769 EP 7773 DI 10.1021/ja9605984 PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA VD328 UT WOS:A1996VD32800016 ER PT J AU Rieke, PC Wiecek, R Marsh, BD Wood, LL Liu, J Song, L Fryxell, GE Tarasevich, BJ AF Rieke, PC Wiecek, R Marsh, BD Wood, LL Liu, J Song, L Fryxell, GE Tarasevich, BJ TI Interfacial free energy of nucleation for iron oxyhydroxide on mixed self-assembled monolayers SO LANGMUIR LA English DT Article ID LANGMUIR MONOLAYERS; CALCIUM-CARBONATE; CRYSTALLIZATION; DEPOSITION; CRYSTALS; BIOMINERALIZATION; INDUCTION; PROTEINS; SULFATE; FILMS AB The deposition kinetics of iron oxyhydroxide were studied on self-assembled monolayers with variable density of terminating sulfonate sites. The thin films of FeOOH were formed on the substrates by thermal hydrolysis of millimolar aqueous solutions of Fe(NO3)(3) at a pH of approximately 2.0. The terminal site density of sulfonate groups was controlled by selectively sulfonating the vinyl groups of self-assembled monolayers (SAMs) formed from various ratios of vinyl- and methyl-terminated monomers, The percentage composition of the sulfonate sites matched the percentage vinyl composition in the SAM deposition solution. By XPS analysis, iron was shown to rapidly and irreversibly physisorb to the surface in direct proportion to the percentage of sulfonate, with one iron for every two sulfonate groups. The induction time For FeOOH film growth was measured as a function of sulfonate site density. The induction times and, hence, the interfacial Gee energy for nucleation (IFEN) data suggest two regimes exist for film growth. From 0% to 35% sulfonate density, the IFEN decreased with increasing sulfonate density, while from 35% to 100% the IFEN was independent of sulfonate site density. In contrast the surface composition and its ability to physisorb iron are linearly related to the intended composition. While the sulfonate sites are required for initial physisorption of iron, a simple relationship between sulfonate surface site density and the IFEN does not exist. RP Rieke, PC (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 49 TC 29 Z9 30 U1 3 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG 21 PY 1996 VL 12 IS 17 BP 4266 EP 4271 DI 10.1021/la950584w PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA VD945 UT WOS:A1996VD94500032 ER PT J AU Beise, EJ Beck, DH Candell, E Carr, R Duncan, F Forest, T Korsch, W Mark, JW McKeown, RD Mueller, BA Pitt, M Wells, S AF Beise, EJ Beck, DH Candell, E Carr, R Duncan, F Forest, T Korsch, W Mark, JW McKeown, RD Mueller, BA Pitt, M Wells, S TI A high power liquid hydrogen target for parity violation experiments SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SCATTERING; PROTON AB Parity-violating electron scattering measurements on hydrogen and deuterium, such as those underway at the Bates and CEBAF laboratories, require luminosities exceeding 10(38) cm(-2) s(-1), resulting in large beam power deposition into cryogenic liquid. Such targets must be able to absorb 500 W or more with minimal change ir: target density. A 40 cm long liquid hydrogen target, designed to absorb 500 W of beam power without boiling, has been developed for the SAMPLE experiment at Bates, In recent tests with 40 mu A of incident beam, no evidence was seen for density fluctuations in the target, at a sensitivity level of better than 1%. A summary of the target design and operational experience will be presented. C1 UNIV ILLINOIS,URBANA,IL 61801. UNIV MARYLAND,COLLEGE PK,MD 20742. RENSSELAER POLYTECH INST,TROY,NY 12180. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. MIT,BATES LINEAR ACCELERATOR CTR,MIDDLETON,MA 01949. RP Beise, EJ (reprint author), CALTECH,PASADENA,CA 91125, USA. NR 12 TC 27 Z9 27 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 AUG 21 PY 1996 VL 378 IS 3 BP 383 EP 391 DI 10.1016/0168-9002(96)00489-5 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VH095 UT WOS:A1996VH09500004 ER PT J AU Bell, W Bonivento, W Cankocak, K Cattai, A Contri, R DeMin, A Gorn, L Navarria, FL Ragazzi, S Szczekowsky, M Tabarelli de Fatis, T Tonazzo, A AF Bell, W Bonivento, W Cankocak, K Cattai, A Contri, R DeMin, A Gorn, L Navarria, FL Ragazzi, S Szczekowsky, M Tabarelli de Fatis, T Tonazzo, A TI Performance of an artificially aged module of the DELPHI HPC calorimeter SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID WIRE AB The readout proportional chambers of the HPC electromagnetic calorimeter in the DELPHI experiment are affected by large ageing. In order to study the calorimeter long-term behaviour, one HPC module was extracted from DELPHI in 1992 and was brought to a test area where it was artificially aged during a period of two years; an ageing level exceeding that expected for the HPC at the end of the LEP era was reached. During this period the performance of the module was periodically tested by means of dedicated beam tests whose results are discussed in this paper. These show that ageing has no significant effects on the response linearity and on the energy resolution for electromagnetic showers, once the analog response loss is compensated for by increasing the chamber gain through the anode voltage. C1 UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV STOCKHOLM, FISIKUM, S-11385 STOCKHOLM, SWEDEN. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. IST NAZL FIS NUCL, I-16146 GENOA, ITALY. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV, DEPT PHYS, AMES, IA 50011 USA. UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. INST NUCL STUDIES, PL-99681 WARSAW, POLAND. UNIV WARSAW, PL-99681 WARSAW, POLAND. RI Ragazzi, Stefano/D-2463-2009; OI Ragazzi, Stefano/0000-0001-8219-2074; DE MIN, ALBERTO/0000-0002-8130-9389 NR 12 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 21 PY 1996 VL 378 IS 3 BP 499 EP 505 DI 10.1016/0168-9002(96)00462-7 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VH095 UT WOS:A1996VH09500019 ER PT J AU Griffith, GW Menlove, HO AF Griffith, GW Menlove, HO TI Design of active-neutron fuel rod scanner SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB An active-neutron fuel rad scanner has been designed for the assay of fissile materials in mixed oxide fuel rods. A Cf-252 source is located at the center of the scanner very near the through hole for the fuel rods. Spontaneous fission neutrons from the californium are moderated and induce fissions within the passing fuel rod. The rod continues past a combined gamma-ray and neutron shield where delayed gamma rays above I MeV are detected. We used the Monte Carlo code MCNP to design the scanner and review optimum materials and geometries. An inhomogeneous beryllium, graphite, and polyethylene moderator has been designed that uses source neutrons much more efficiently than assay systems using polyethylene moderators. Layers of berated polyethylene and tungsten are used to shield the detectors. Large NaI(Tl) detectors were selected to measure the delayed gamma rays. The enrichment zones of a thermal reactor fuel pin could be measured to within 1% counting statistics for practical rod speeds. Applications of the rod scanner include accountability of fissile material for safeguards applications, quality control of the fissile content in a fuel rod, and the verification of reactivity potential for mixed oxide fuels. RP Griffith, GW (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 9 TC 3 Z9 6 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 21 PY 1996 VL 378 IS 3 BP 552 EP 560 DI 10.1016/0168-9002(96)00233-1 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VH095 UT WOS:A1996VH09500028 ER PT J AU Powers, PE Taatjes, CA Kulp, TJ AF Powers, PE Taatjes, CA Kulp, TJ TI Two-tone frequency modulation spectroscopy from laser light scattered off a hard target SO APPLIED OPTICS LA English DT Article ID FM SPECTROSCOPY; DIODE-LASER AB One can apply two-tone frequency modulation spectroscopy techniques to the detection of gas-phase species by using laser light scattered from hard targets. High sensitivities are demonstrated, with a minimum detectable absorption of 10(-4) possible with a simple apparatus. The effects of laser speckle on the FM signal are described, and we show that the detection signal-to-noise ratio can be improved by collecting an increased number of speckle cells. RP Powers, PE (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550, USA. NR 9 TC 5 Z9 5 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD AUG 20 PY 1996 VL 35 IS 24 BP 4735 EP 4739 DI 10.1364/AO.35.004735 PG 5 WC Optics SC Optics GA VC320 UT WOS:A1996VC32000006 PM 21102893 ER PT J AU Min, SL Gomez, A AF Min, SL Gomez, A TI High-resolution size measurement of single spherical particles with a fast Fourier transform of the angular scattering intensity SO APPLIED OPTICS LA English DT Article DE light scattering; fast Fourier transform; angular scattering intensity; phase functions; particle sizing ID LIGHT-SCATTERING; DOPPLER; RESONANCES; ANALYZER AB A technique is described and demonstrated to measure the size of spherical particles of known index of refraction by laser light scattering with an accuracy of better than 1%. This technique entails imaging the angular scattering intensity onto a photodiode array and applying a fast Fourier transform to the array output to obtain a frequency and phase corresponding to the number and angular position of the scattering lobes. Errors associated with particle trajectory effects and changes in the index of refraction are also considered. Results are not affected by the former, whereas variations of the refractive index by 2%, as may be typical, for example, of the transient heat up of a liquid hydrocarbon droplet, cause a deterioration of sizing accuracy to approximately 3%. The technique can in principle be applied in real time at data rates as high as 20-30 kHz with a modest equipment investment. Therefore, the measurement of droplet evaporation rates in dilute sprays with unprecedented accuracy appears to be feasible. (C) 1996 Optical Society of America C1 YALE UNIV,DEPT MECH ENGN,NEW HAVEN,CT 06520. RP Min, SL (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. NR 18 TC 25 Z9 25 U1 2 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD AUG 20 PY 1996 VL 35 IS 24 BP 4919 EP 4926 DI 10.1364/AO.35.004919 PG 8 WC Optics SC Optics GA VC320 UT WOS:A1996VC32000031 PM 21102918 ER PT J AU Bromley, BC AF Bromley, BC TI Finite-size gravitational microlenses SO ASTROPHYSICAL JOURNAL LA English DT Article DE dark matter; gravitational lensing AB The finite size of a gravitational microlens may have an effect on the observed amplification of a background point source. The mechanism is occlusion of one or more of the source images by the opaque bulk material of the lens as it travels in front of the source. To observe this phenomenon where both amplification and occlusion are important, the lensing geometry must be finely tuned so that the physical size of the lens is very near its Einstein radius. This condition makes the probability of an occlusion event extremely low; however, if such an event is detected, then the surface acceleration of the lens is constrained to within a geometrical factor related to the observer-lens distance. This information may provide a key to the identity of the lens. RP Bromley, BC (reprint author), LOS ALAMOS NATL LAB,MS B288,LOS ALAMOS,NM 87545, USA. NR 3 TC 10 Z9 10 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 20 PY 1996 VL 467 IS 2 BP 537 EP 539 DI 10.1086/177630 PN 1 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VD218 UT WOS:A1996VD21800007 ER PT J AU Murray, SD Lin, DNC AF Murray, SD Lin, DNC TI Coalescence, star formation, and the cluster initial mass function SO ASTROPHYSICAL JOURNAL LA English DT Article DE hydrodynamics; stars, formation; stars, luminosity function, mass function ID L1630 MOLECULAR CLOUD; GLOBULAR-CLUSTERS; PROTOGLOBULAR CLUSTERS; STELLAR-SYSTEMS; TIDAL EVOLUTION; BINARY-SYSTEMS; FRAGMENTATION; COLLAPSE; CAPTURE; GALAXY AB The shape of the stellar initial mass function (IMF) of star clusters has important consequences for the subsequent evolution of the clusters. In this paper we examine a star formation scenario in which the IMF is determined. Thermal and dynamical instability result in the fragmentation of a parent gaseous protocluster cloud into cold, dense, low-mass cloudlets. Here we examine the subsequent evolution of the cloudlets as the cluster approaches virial equilibrium. Because of their inverse buoyancy,the cloudlets fall toward the central region of the protocluster cloud. During the infall, cohesive collisions cause the cloudlets' masses to grow. When the mass of a cloudlet exceeds the critical mass for gravitational instability, M(G), it collapses to form a protostellar core. Its mass may continue to grow as a result of mergers with remaining cloudlets until its UV emission heals and ionizes nearby cloudlets. The most massive stars require many dissipative mergers and so are preferentially formed in the cluster center, giving an initial mass segregation consistent with the observed stellar distribution in open clusters. Energy loss associated with the mergers also makes it more likely that the newly formed clusters will remain gravitationally bound even in the limit of inefficient star formation. The coagulation process naturally leads to a power-law IMF. The range of power-law exponents, x is found to be similar to those observed in both open and globular star clusters in the Galaxy. Although limited by the use of a direct N-body code to initial particle numbers N-i less than or similar to 10(4) and final number of stars less than or similar to 10(3), the results are found to be insensitive to N-i. for a constant value of the initial covering factor of the stars. The results can therefore be confidently applied to very rich clusters. The final slope of the IMF also depends upon the initial velocity distribution and the ratio of the initial mass of the cloudlets to M(G). The latter ratio may be a function of the metallicity ([Fe/H]) and external pressure of the protocluster clouds so as to give the observed variation of x with [Fe/H] and Galactocentric position among the Galactic globular clusters. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV CALIF SANTA CRUZ, BOARD STUDIES ASTRON & ASTROPHYS, SANTA CRUZ, CA 95064 USA. RP UNIV CALIF BERKELEY, DEPT ASTRON, 601 CAMPBELL HALL, BERKELEY, CA 94720 USA. RI Murray, Stephen/I-8685-2016 OI Murray, Stephen/0000-0001-5597-090X NR 41 TC 84 Z9 86 U1 0 U2 0 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 AUG 20 PY 1996 VL 467 IS 2 BP 728 EP 748 DI 10.1086/177648 PN 1 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VD218 UT WOS:A1996VD21800025 ER PT J AU Eikenberry, SS Fazio, GG Ransom, SM Middleditch, J Kristian, J Pennypacker, CR AF Eikenberry, SS Fazio, GG Ransom, SM Middleditch, J Kristian, J Pennypacker, CR TI Infrared-to-ultraviolet wavelength-dependent variations within the pulse profile peaks of the Crab Nebula pulsar SO ASTROPHYSICAL JOURNAL LA English DT Article DE instrumentation, detectors; pulsars, individual (PSR 0531+21); stars, neutron ID RAPIDLY SPINNING PULSARS; ENERGETIC RADIATION; TIME RESOLUTION AB We present evidence of wavelength-dependent variations within the infrared, optical, and ultraviolet pulse profile peaks of the Crab Nebula pulsar. The leading and trailing edge half-width half-maxima of the peaks display clear differences in their wavelength dependences. In addition, phase-resolved infrared-to-ultraviolet color spectra show significant variations from the leading to trailing edges of the peaks. The color variations between the leading and trailing edges remain significant over phase differences smaller than 0.0054, corresponding to timescales of <180 mu s. These results are not predicted by any current models of the pulsar emission mechanism and offer new challenges for the development of such models. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. OBSERV CARNEGIE INST WASHINGTON,PASADENA,CA 91101. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. RP Eikenberry, SS (reprint author), HARVARD SMITHSONIAN CTR ASTROPHYS,60 GARDEN ST,CAMBRIDGE,MA 02138, USA. OI Ransom, Scott/0000-0001-5799-9714 NR 11 TC 10 Z9 10 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 20 PY 1996 VL 467 IS 2 BP L85 EP L88 DI 10.1086/310206 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VD221 UT WOS:A1996VD22100012 ER PT J AU Sakon, J Adney, WS Himmel, ME Thomas, SR Karplus, PA AF Sakon, J Adney, WS Himmel, ME Thomas, SR Karplus, PA TI Crystal structure of thermostable family 5 endocellulase E1 from Acidothermus cellulolyticus in complex with cellotetraose SO BIOCHEMISTRY LA English DT Article ID MOLECULAR-MODEL REFINEMENT; ACTIVE-SITE; NUCLEOTIDE-SEQUENCE; BETA-GALACTOSIDASE; CELLULOMONAS-FIMI; CLOSTRIDIUM-THERMOCELLUM; 3-DIMENSIONAL STRUCTURE; CATALYTIC DOMAIN; PSEUDOMONAS-FLUORESCENS; GLYCOSYL HYDROLASES AB The crystal structure of the catalytic domain of the thermostable endocellulase E1 from Acidothermus cellulolyticus in complex with cellotetraose has been solved by multiple isomorphous replacement and refined at 2.4 Angstrom resolution to an R-factor of 0.18 (R(free) = 0.24). E1cd is a member of the 4/7 superfamily of hydrolases, and as expected, its structure is an (alpha/beta)(8) barrel, which constitutes a prototype for family 5-subfamily 1 cellulases. The cellotetraose molecule binds in a manner consistent with the expected Michaelis complex for the glycosylation half-reaction and reveals that all eight residues conserved in family 5 enzymes are involved in recognition of the glycosyl group attacked during cleavage. Whereas only three residues are conserved in the whole 4/7 superfamily (the Asn/Glu duo and the Glu from which the name is derived), structural comparisons show that all eight residues conserved in family 5 have functional equivalents in the other 4/7 superfamily members, strengthening the case that mechanistic details are conserved throughout the superfamily. On the basis of the structure, a detailed sequence of physical steps of the cleavage mechanism is proposed. A close approach of two key glutamate residues provides an elegant mechanism for the shift in the pK(a) of the acid/base for the glycosylation and deglycosylation half-reactions. Finally, purely structural based comparisons are used to show that significant differences exist in structural similarity scores resulting from different methods and suggest that caution should be exercised in interpreting such results in terms of implied evolutional relationships. C1 CORNELL UNIV,BIOCHEM MOL & CELL BIOL SECT,ITHACA,NY 14853. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. OI Sakon, Joshua/0000-0002-8373-969X NR 84 TC 193 Z9 203 U1 4 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 20 PY 1996 VL 35 IS 33 BP 10648 EP 10660 DI 10.1021/bi9604439 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VD054 UT WOS:A1996VD05400009 PM 8718854 ER PT J AU Tiede, DM Vazquez, J Cordova, J Marone, PA AF Tiede, DM Vazquez, J Cordova, J Marone, PA TI Time-resolved electrochromism associated with the formation of quinone anions in the Rhodobacter sphaeroides R26 reaction center SO BIOCHEMISTRY LA English DT Article ID PHOTOSYNTHETIC REACTION CENTERS; ELECTRON-TRANSFER; RHODOPSEUDOMONAS-VIRIDIS; CHARGE RECOMBINATION; BACTERIAL PHOTOSYNTHESIS; INFRARED-SPECTROSCOPY; H+ BINDING; PROTEIN; ACCEPTOR; KINETICS AB The bacterial photosynthetic reaction center contains bacteriochlorophyll (Bchl) and bacteriopheophytin (Bph) cofactors that provide natural probes of electrostatic fields within this protein. We have examined the electrochromic responses of these cofactors, resolved during the lifetimes of the quinone anion states, P(+)Q(A)-Q(B) and P(+)Q(A)Q(B)(-), and measured as a function of temperature. These measurements provide information on the time-dependent variation in electrostatic field strength on the Bchl and Bph cofactors. Measurements in the near-infrared absorbance bands have revealed the following. First, the Q(A)(-)Q(B) --> Q(A)Q(B)(-) electron transfer rate is found to be heterogeneous, consisting of at least two distinct kinetic components. At room temperature, we find a previously unresolved fast kinetic component with a reaction time of 25-40 mu s, depending upon the preparation, that accounts for approximately 25% of the total reaction yield. The major component was identified with a reaction time of 210-240 mu s. Below -20 degrees C, Q(A)(-)Q(B) --> Q(A)Q(B)(-) electron transfer shows distributed kinetics. The temperature-dependent conversion from biphasic to distributed kinetics suggests that there is a thermal averaging of conformational substates around two reaction center configurations. Interestingly, direct excitation of the Bph with 532 nm light at low temperatures appears to alter the electron transfer kinetics, possibly by inducing a change in the distribution of conformational states. The reaction kinetics were found to be sensitive to the addition of ethylene glycol, which is likely to reflect an osmolarity effect. Second, time-dependent absorption changes of the Bchl and Bph cofactors are found to be kinetically decoupled. The rapid responses of the Bph bands are interpreted to reflect electron transfer, while the slower responses of the Bchl are interpreted to reflect slower relaxation events, possibly including proton uptake. Finally, we find that the electrochromic response and Q(A)(-)Q(B) --> Q(A)Q(B)(-) electron transfer to be sensitive to the preparative state of the reaction center, reflecting differences in quinone binding for reaction centers in different states of purification. RP Tiede, DM (reprint author), ARGONNE NATL LAB, CHEM DIV D 200, ARGONNE, IL 60439 USA. NR 60 TC 109 Z9 113 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 20 PY 1996 VL 35 IS 33 BP 10763 EP 10775 DI 10.1021/bi9605907 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VD054 UT WOS:A1996VD05400022 PM 8718867 ER PT J AU Peng, L Silman, I Sussman, J Goeldner, M AF Peng, L Silman, I Sussman, J Goeldner, M TI Biochemical evaluation of photolabile precursors of choline and of carbamylcholine for potential time-resolved crystallographic studies on cholinesterases SO BIOCHEMISTRY LA English DT Article ID ACETYLCHOLINE-RECEPTOR LIGAND; LAUE CRYSTALLOGRAPHY; CATALYTIC EFFICIENCY; CAGED COMPOUNDS; BACK DOOR; SITE; MUTAGENESIS; BINDING; BUTYRYLCHOLINESTERASE; PHOTOCHEMISTRY AB Acetylcholinesterase and butyrylcholinesterase both rapidly hydrolyze the neurotransmitter acetylcholine. The unusual three-dimensional structure of acetylcholinesterase, in which the active site is located at the bottom of a deep and nan ow gorge. raises cogent questions concerning traffic of the substrate, acetylcholine, and the products, choline and acetate, to and from the active site. Time-resolved crystallography offers a promising experimental approach to investigate this issue but requires a suitable triggering mechanism to ensure efficient and synchronized initiation of the dynamic process being monitored. Here we characterize the properties of two photolabile triggers which may serve as tools in time-resolved crystallographic studies of the cholinesterases. These compounds are 2-nitrobenzyl derivatives of choline and of carbamylcholine, which generate choline and carbamylcholine, respectively, upon photochemical fragmentation, Both photolabile compounds are reversible inhibitors, which bind at the active sites of acetylcholinesterase and butyrylcholinesterase with inhibition constants in the micromolar range, and both photofragmentation processes occur rapidly and with a high quantum yield, without substantial photochemical damage to the enzymes, Photolysis both of acetylcholinesterase and of butyrylcholinesterase, complexed with a 2-nitrobenzyl derivative of choline, resulted in regeneration of enzymic activity, Photolysis of acetylcholinesterase complexed with the 2-nitrobenzyl derivative of carbamylcholine led to time-dependent inactivation, resulting from carbamylation of acetylcholinesterase, which could be reversed upon dilution, due to decarbamylation. Both sets of experiments demonstrated release of choline within the active site. In the former case, choline was produced photochemically at the active site, In the latter case, choline was generated enzymatically, within the active site, concomitantly with carbamylation of the acetylcholinesterase. The two photolabile compounds may thus serve as complementary probes for time-resolved studies of the route of product release from the active sites of the cholinesterases. C1 UNIV STRASBOURG 1,FAC PHARM,URA 1386,CNRS,CHIM BIOORGAN LAB,F-67401 ILLKIRCH GRAFFENS,FRANCE. WEIZMANN INST SCI,DEPT NEUROBIOL,IL-76100 REHOVOT,ISRAEL. WEIZMANN INST SCI,DEPT BIOL STRUCT,IL-76100 REHOVOT,ISRAEL. BROOKHAVEN NATL LAB,DEPT BIOL,PROT DATA BANK,UPTON,NY 11973. OI Sussman, Joel/0000-0003-0306-3878 NR 44 TC 21 Z9 21 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 20 PY 1996 VL 35 IS 33 BP 10854 EP 10861 DI 10.1021/bi9529014 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VD054 UT WOS:A1996VD05400032 PM 8718877 ER PT J AU Houston, PL Suits, AG Toumi, R AF Houston, PL Suits, AG Toumi, R TI Isotopic enrichment of heavy ozone in the stratosphere SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID PHOTO-DISSOCIATION; MOLECULAR-OXYGEN; CARBON-DIOXIDE; FRACTIONATION; PHOTODISSOCIATION; O-2; SPECTROSCOPY; MECHANISM; ABSORPTION; ATMOSPHERE AB A mass-independent, 3% enrichment of heavy ozone isotopes in the stratosphere can be assigned to a mechanism in which (1) short-wavelength photodissociation of ozone produces O-2(v greater than or equal to 26) + O, (2) the O-2)(v greater than or equal to 26) reacts with ground state O-2 to produce O-3 + O, and (3) each O atom recombines with O-2 to form O-3. The overall reaction scheme, O-3 + hv + 3O(2) --> 3O(3), produces more ozone than it consumes. The dissociation channel which begins this scheme is more probable for heavy ozone than for O-48(3), and one of the oxygen atoms in the original O-3 is incorporated into a new O-3. Thus this new ozone source tends to ''distill'' heavy oxygen atoms into the O-3 pool while depleting them from the O-2 pool. The amount of enrichment produced by this mechanism, while significant, is still too small to account for the large observed stratospheric enrichment of heavy ozone. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND. RP Houston, PL (reprint author), CORNELL UNIV, BAKER LAB CHEM, ITHACA, NY 14853 USA. NR 41 TC 10 Z9 10 U1 0 U2 2 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 AUG 20 PY 1996 VL 101 IS D13 BP 18829 EP 18834 DI 10.1029/96JD01664 PG 6 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA VD227 UT WOS:A1996VD22700023 ER PT J AU He, YD AF He, YD TI Studying new physics using ultrahigh-energy cosmic-ray gamma-family data SO MODERN PHYSICS LETTERS A LA English DT Review ID NUCLEON-NUMBER DEPENDENCE; HADRON-HADRON COLLISIONS; JET CROSS-SECTION; QUARK COMPOSITENESS; P(P)OVER-BAR COLLISIONS; INCLUSIVE PRODUCTION; TRANSVERSE-MOMENTUM; EMULSION CHAMBERS; MODEL; QCD AB This review discusses some recent developments in the study of ultrahigh-energy interactions using cosmic-ray gamma-family data obtained with emulsion chambers at mountain altitudes. The apparent excess of the event rate at large transverse momenta with respect to the prediction based on perturbative QCD indicates new interaction mechanisms at E(lab)similar or equal to 10(4)-10(5) TeV, an energy regime beyond the reach of existing colliders. To reconcile the data with a compositeness model of quarks, the characteristic energy scale would have to be as low as Lambda(c) less than or equal to 0.1 TeV, in conflict with the lower limit of Lambda(c)>1.4 TeV or a possible value of Lambda(c) similar or equal to 1.6 TeV obtained by the CDF experiment at Tevatron. Possible new physics beyond the standard model, together with future experiments at the LHC, are also discussed. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,INST NUCL & PARTICLE ASTROPHYS,BERKELEY,CA 94720. RP He, YD (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 56 TC 2 Z9 2 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD AUG 20 PY 1996 VL 11 IS 25 BP 2013 EP 2026 DI 10.1142/S0217732396002009 PG 14 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA VE631 UT WOS:A1996VE63100001 ER PT J AU Cui, ST Cummings, PT Cochran, HD AF Cui, ST Cummings, PT Cochran, HD TI The calculation of the viscosity from the autocorrelation function using molecular and atomic stress tensors SO MOLECULAR PHYSICS LA English DT Article ID DYNAMICS; FLUIDS AB The stress-stress correlation function and the viscosity of a united-atom model of liquid decane are studied by equilibrium molecular dynamics simulation using two different formalisms for the stress tensor: the atomic and the molecular formalisms. The atomic and molecular correlation functions show dramatic difference in short-time behaviour. The integrals of the two correlation functions, however, become identical after a short transient period which is significantly shorter than the rotational relaxation time of the molecule. Both reach the same plateau value in a time period corresponding to this relaxation time. These results provide a convenient guide for the choice of the upper integral time limit in calculating the viscosity by the Green-Kubo formula. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP Cui, ST (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996, USA. RI Cummings, Peter/B-8762-2013 OI Cummings, Peter/0000-0002-9766-2216 NR 9 TC 25 Z9 25 U1 0 U2 3 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD AUG 20 PY 1996 VL 88 IS 6 BP 1657 EP 1664 DI 10.1080/00268979650025696 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VG233 UT WOS:A1996VG23300017 ER PT J AU Bhupathiraju, R Cummings, PT Cochran, HD AF Bhupathiraju, R Cummings, PT Cochran, HD TI An efficient parallel algorithm for non-equilibrium molecular dynamics simulations of very large systems in planar Couette flow SO MOLECULAR PHYSICS LA English DT Article AB In this paper we present an efficient parallel domain decomposition algorithm for non-equilibrium molecular dynamics (NEMD) simulations of large systems under planar Couette flow. We propose a modified deforming cell method that permits NEMD simulations with negligible penalties due to the Lees-Edwards periodic boundary conditions. The algorithm was used to study large systems of the Weeks-Chandler-Andersen fluid in order to obtain better viscosity results at the low shear rate regimes where the signal-to-noise ratio is very small. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP Bhupathiraju, R (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996, USA. RI Cummings, Peter/B-8762-2013 OI Cummings, Peter/0000-0002-9766-2216 NR 5 TC 15 Z9 15 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD AUG 20 PY 1996 VL 88 IS 6 BP 1665 EP 1670 DI 10.1080/00268979650025704 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VG233 UT WOS:A1996VG23300018 ER PT J AU Lundmark, PJ Kubas, GJ Scott, BL AF Lundmark, PJ Kubas, GJ Scott, BL TI Formation of an anionic titanium(IV) sulfide dimer, {Na-2[CpTi(mu-S)(S)](2)center dot 4THF}(2), by elimination of CpH and H-2 from Cp(2)Ti(SH)(2) upon deprotonation with NaH SO ORGANOMETALLICS LA English DT Article ID HOMOGENEOUS HYDROGENATION; MOLECULAR-STRUCTURE; VANADIUM COMPLEXES; CRYSTAL-STRUCTURES; METAL-COMPLEXES; SO2; REACTIVITY; SULFUR; BOND; OXO AB A deprotonation. reaction of Cp(2)Ti(SH)(2) with NaH in THF yields {Na-2[CpTi(mu-S)(S)](2) . 4THF}(2), generated by unexpected elimination of CpH. This anionic dimer is unique in that it is the first organomtallic titanium species containing terminal sulfido ligands. The latter are stabilized by interactions with THF-solvated sodium cations, thus imposing a syn Ti=S configuration. C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 45 TC 34 Z9 34 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD AUG 20 PY 1996 VL 15 IS 17 BP 3631 EP 3633 DI 10.1021/om960358x PG 3 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA VD296 UT WOS:A1996VD29600001 ER PT J AU Newcomer, PP Barbour, JC Wang, LM Venturini, EL Kwak, JF Ewing, RC Miller, ML Morosin, B AF Newcomer, PP Barbour, JC Wang, LM Venturini, EL Kwak, JF Ewing, RC Miller, ML Morosin, B TI Temperature dependent microstructural modification in ion-irradiated Tl-type high temperature superconductors SO PHYSICA C LA English DT Article ID SINGLE-CRYSTAL; THIN-FILMS; YBA2CU3O7-DELTA; AMORPHIZATION; TRANSITION; RECOVERY AB Ion irradiation damage creation and recovery were examined in TI-based high temperature superconductors, HTSC, using TEM, resistivity, and magnetic measurements for irradiation temperatures of 20 to 650 K. During 1.5 MeV Kr+ and Xe+ ion irradiations of single-crystal Tl-1212 and Tl-2212 Tl-Ba-Ca-Cu-O HTSC, microstructural modification was observed in situ by electron diffraction and shows a remarkable temperature dependence. At selected sample temperatures, irradiations continued until a critical fluence, D-c, was reached where the original structure disappeared, The temperature dependence of D-c shows a minimum near the superconducting transition temperature, T-c, and is correlated with the temperature dependence of the thermal conductivity, which has a maximum near T-c. At an irradiation temperature near this maximum in thermal conductivity, a minimum amount of damage recovery occurs because heat can be dissipated away from the displacement cascade, Ion irradiation suppresses the T-c. The rate of decrease in the T-c as a function of damage (measured in displacements per atom, dpa) was found to be the same for various incident ions (He+, O2+, Au5+ which shows that the damage accumulation is a result of atomic collisions. Further, the rate of decrease in T-c was found to be the same for both transport and magnetization measurements, indicating that the displacements effect the bulk of the samples through point defect creation, An activation energy of 0.4 eV for ion irradiation damage recovery over the temperature range from 100 to 650 K was determined from normal. state resistance versus time immediately after irradiation. C1 UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. RP Newcomer, PP (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 24 TC 9 Z9 9 U1 2 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD AUG 20 PY 1996 VL 267 IS 3-4 BP 243 EP 253 DI 10.1016/0921-4534(96)00282-1 PG 11 WC Physics, Applied SC Physics GA VE497 UT WOS:A1996VE49700006 ER PT J AU Allison, DP Kerper, PS Doktycz, MJ Spain, JA Modrich, P Larimer, FW Thundat, T Warmack, RJ AF Allison, DP Kerper, PS Doktycz, MJ Spain, JA Modrich, P Larimer, FW Thundat, T Warmack, RJ TI Direct atomic force microscope imaging of EcoRI endonuclease site specifically bound to plasmid DNA molecules SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID SCANNING TUNNELING MICROSCOPY; RI ENDONUCLEASE; DEOXYRIBONUCLEIC-ACID; RECOGNITION; COMPLEXES; STRANDS; SURFACE; MICA AB Direct imaging with the atomic force microscope has been used to identify specific nucleotide sequences in plasmid DNA molecules, This was accomplished using EcoRI(Gln-lll), a mutant of the restriction enzyme that has a 1000-foId greater binding affinity than the wild-type enzyme but with cleavage rate constants reduced by a Factor of 10(4). ScaI-linearized plasmids with single (pBS(+)) and double (pGEM-luc and pSV-beta-galactosidase) EcoRI recognition sites were imaged, and the bound enzyme,vas localized to a 50- to 100-nt resolution. The high affinity for the EcoRI binding site exhibited by this mutant endonuclease, coupled with an observed low level of nonspecific binding, should prove valuable for physically mapping large DNA clones by direct atomic force microscope imaging. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. DUKE UNIV,MED CTR,DEPT BIOCHEM,DURHAM,NC 27710. RP Allison, DP (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,OAK RIDGE,TN 37831, USA. RI Doktycz, Mitchel/A-7499-2011 OI Doktycz, Mitchel/0000-0003-4856-8343 NR 26 TC 51 Z9 52 U1 0 U2 4 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD AUG 20 PY 1996 VL 93 IS 17 BP 8826 EP 8829 DI 10.1073/pnas.93.17.8826 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VD434 UT WOS:A1996VD43400008 PM 8799111 ER PT J AU Hummer, G Garde, S Garcia, AE Pohorille, A Pratt, LR AF Hummer, G Garde, S Garcia, AE Pohorille, A Pratt, LR TI An information theory model of hydrophobic interactions SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE solvation; hydrophobic effects; biomolecule solution structure ID SOLVATION FREE-ENERGIES; STATISTICAL MECHANICAL FORMULATION; PROTEIN-FOLDING THERMODYNAMICS; MOLECULAR RECOGNITION; COMPUTER-SIMULATIONS; GLOBULAR-PROTEINS; SIZE DEPENDENCE; SOLVENT MODEL; BOUND WATER; HYDRATION AB A molecular model of poorly understood hydrophobic effects is heuristically developed using the methods of information theory, Because primitive hydrophobic effects can be tied to the probability of observing a molecular-sized cavity in the solvent, the probability distribution of the number of solvent centers in a cavity volume is modeled on the basis of the two moments available from the density and radial distribution of oxygen atoms in liquid water. The modeled distribution then yields the probability that no solvent centers are found in the cavity volume, This model is shown to account quantitatively for the central hydrophobic phenomena of cavity formation and association of inert gas solutes. The connection of information theory to statistical thermodynamics provides a basis for clarification of hydrophobic effects. The simplicity and flexibility of the approach suggest that it should permit applications to conformational equilibria of nonpolar solutes and hydrophobic residues in biopolymers. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV CALIF SAN FRANCISCO,DEPT PHARMACEUT CHEM,SAN FRANCISCO,CA 94143. NASA,AMES RES CTR,MOFFETT FIELD,CA 94035. RI Garde, Shekhar/C-3060-2008; Pratt, Lawrence/H-7955-2012; Hummer, Gerhard/A-2546-2013 OI Pratt, Lawrence/0000-0003-2351-7451; Hummer, Gerhard/0000-0001-7768-746X NR 79 TC 414 Z9 418 U1 7 U2 74 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD AUG 20 PY 1996 VL 93 IS 17 BP 8951 EP 8955 DI 10.1073/pnas.93.17.8951 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VD434 UT WOS:A1996VD43400031 PM 11607700 ER PT J AU Shul, RJ McClellan, GB Casalnuovo, SA Rieger, DJ Pearton, SJ Constantine, C Barratt, C Karlicek, RF Tran, C Schurman, M AF Shul, RJ McClellan, GB Casalnuovo, SA Rieger, DJ Pearton, SJ Constantine, C Barratt, C Karlicek, RF Tran, C Schurman, M TI Inductively coupled plasma etching of GaN SO APPLIED PHYSICS LETTERS LA English DT Article ID GALLIUM NITRIDE; ION; INN; BCL3; ALN; AIN AB Inductively coupled plasma (ICP) etch rates for GaN are reported as a function of plasma pressure, plasma chemistry, rf power, and ICP power. Using a Cl-2/H-2/Ar plasma chemistry, GaN etch rates as high as 6875 Angstrom/min are reported. The GaN surface morphology remains smooth over a wide range of plasma conditions as quantified using atomic force microscopy. Several etch conditions yield highly anisotropic profiles with smooth sidewalls. These results have direct application to the fabrication of group-III nitride etched laser facets. (C) 1996 American Institute of Physics. C1 UNIV FLORIDA,DEPT MAT SCI & ENGN,GAINESVILLE,FL 32611. PLASMA THERM INC,ST PETERSBURG,FL 33716. EMCORE CORP,SOMERSET,NJ 08873. RP Shul, RJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 17 TC 138 Z9 149 U1 2 U2 47 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 19 PY 1996 VL 69 IS 8 BP 1119 EP 1121 DI 10.1063/1.117077 PG 3 WC Physics, Applied SC Physics GA VD023 UT WOS:A1996VD02300033 ER PT J AU Roberts, CD AF Roberts, CD TI Electromagnetic pion form factor and neutral pion decay width SO NUCLEAR PHYSICS A LA English DT Article DE hadron physics F-pi(q(2)), pi(0)->gamma gamma; Dyson-Schwinger equations; confinement; non-perturbative; QCD phenomenology ID NON-PERTURBATIVE CALCULATION; CHIRAL-SYMMETRY BREAKING; GAUGE GLUON PROPAGATOR; EXCLUSIVE PROCESSES; QUANTUM ELECTRODYNAMICS; QUARK PROPAGATOR; INFRARED LIMIT; PHOTON VERTEX; BOUND-STATES; MODEL AB The electromagnetic pion form factor, F-pi(q(2)), is calculated for spacelike q(2) in impulse approximation using a confining quark propagator, S, and a dressed quark-photon vertex, Gamma(mu), obtained from realistic, non-perturbative Dyson-Schwinger equation studies. Good agreement with the available data is obtained for F-pi(q(2)) and other pion observables, including the decay pi(0) --> gamma gamma. This calculation suggests that soft, non-perturbative contributions dominate F-pi(q(2)) at presently accessible q(2). RP Roberts, CD (reprint author), ARGONNE NATL LAB,DIV PHYS,BLDG 203,ARGONNE,IL 60439, USA. OI Roberts, Craig/0000-0002-2937-1361 NR 46 TC 131 Z9 131 U1 0 U2 0 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 AUG 19 PY 1996 VL 605 IS 4 BP 475 EP 495 DI 10.1016/0375-9474(96)00174-1 PG 21 WC Physics, Nuclear SC Physics GA VD480 UT WOS:A1996VD48000003 ER PT J AU Schaab, C Weber, F Weigel, MK Glendenning, NK AF Schaab, C Weber, F Weigel, MK Glendenning, NK TI Thermal evolution of compact stars SO NUCLEAR PHYSICS A LA English DT Review DE dense matter; equation of state; neutron stars; strange stars; cooling ID NEUTRINO-PAIR BREMSSTRAHLUNG; LIQUID-METAL PHASE; TEMPERATURE QUANTUM CORRECTIONS; CRYSTALLINE LATTICE PHASE; ASYMMETRIC NUCLEAR-MATTER; DIRECT URCA PROCESSES; PULSED X-RAYS; DENSE MATTER; ROSAT OBSERVATIONS; STRANGE STARS AB A collection of modem, held-theoretical equations of state is applied to the investigation of cooling properties of compact stars. These comprise neutron stars as well as hypothetical strange-matter stars, made up of absolutely stable 3-flavor strange-quark matter. Various uncertainties in the behavior of matter at supernuclear densities, e.g., hyperonic degrees of freedom, behavior of coupling strengths in matter, pion and meson condensation, superfluidity, transition to quark matter, absolute stability of strange-quark matter, and last but not least the many-body technique itself are tested against the body of observed cooling data. C1 UNIV MUNICH, SEKT PHYS, D-85748 GARCHING, GERMANY. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, INST NUCL & PARTICLE ASTROPHYS, BERKELEY, CA 94720 USA. RP UNIV MUNICH, INST THEORET PHYS, THERESIENSTR 37, D-80333 MUNICH, GERMANY. RI Schaab, Christoph/C-6098-2008 NR 116 TC 67 Z9 68 U1 1 U2 1 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 AUG 19 PY 1996 VL 605 IS 4 BP 531 EP 565 DI 10.1016/0375-9474(96)00164-9 PG 35 WC Physics, Nuclear SC Physics GA VD480 UT WOS:A1996VD48000006 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Cbapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miler, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Philips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Scarpine, V Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, M Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Soumarokov, A Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G vandenBrink, S Vejcik, S Velev, G Vidal, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, D Wolinski, J Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Cbapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miler, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Philips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Scarpine, V Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, M Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Soumarokov, A Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G vandenBrink, S Vejcik, S Velev, G Vidal, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, D Wolinski, J Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI Measurement of the Lambda(b)(0) lifetime using Lambda(b)(0)->Lambda(c)(+)l(-)(nu)over-bar SO PHYSICAL REVIEW LETTERS LA English DT Article ID = 1.8 TEV; P(P)OVER-BAR COLLISIONS; QUARK PRODUCTION; BARYON LIFETIME; DECAYS; CDF; DETECTOR AB The lifetime of Lambda(b)(0) is measured using the semileptonic decay Lambda(b)(0)-->Lambda(c)(+)l(-)nu(-), where the Lambda(c)(+) is reconstructed through its decay Lambda(c)(+) --> pK(-)pi(+). The data were collected by the CDF detector at the Tevatron Collider during 1992-1995 and correspond to an integrated luminosity of 110 pb(-1) of collisions at root s=1.8 TeV. From a fit to the decay length distribution of the Lambda(c)-lepton system from 197+/-25 signal events, the lifetime of Lambda(b)(0) is measured to be 1.32+/-0.15+/- 0.07 ps. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15260. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015 OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580 NR 20 TC 28 Z9 28 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 AUG 19 PY 1996 VL 77 IS 8 BP 1439 EP 1443 DI 10.1103/PhysRevLett.77.1439 PG 5 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600008 ER PT J AU Alhassid, Y Bertsch, GF Dean, DJ Koonin, SE AF Alhassid, Y Bertsch, GF Dean, DJ Koonin, SE TI Shell model Monte Carlo studies of gamma-soft nuclei SO PHYSICAL REVIEW LETTERS LA English DT Article AB We present shell model Monte Carlo calculations for nuclei in the full major shell 50-82 for both protons and neutrons. For the interaction we use a pairing plus quadrupole derived from a surface-peaked separable force. The methods are illustrated for Sn-124, Te-128, and Xe-124. We calculate shape distributions, moments of inertia, and pairing correlations as functions of temperature and angular velocity. Our calculations are the first microscopic evidence of gamma-softness of nuclei in this region. C1 UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. UNIV WASHINGTON,INST NUCL THEORY,SEATTLE,WA 98195. CALTECH,KELLOGG RADIAT LAB,PASADENA,CA 91125. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP Alhassid, Y (reprint author), YALE UNIV,SLOANE PHYS LAB,CTR THEORET PHYS,NEW HAVEN,CT 06520, USA. OI Dean, David/0000-0002-5688-703X NR 20 TC 41 Z9 41 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 19 PY 1996 VL 77 IS 8 BP 1444 EP 1447 DI 10.1103/PhysRevLett.77.1444 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600009 ER PT J AU Glenzer, SH Back, CA Estabrook, KG Wallace, R Baker, K MacGowan, BJ Hammel, BA Cid, RE DeGroot, JS AF Glenzer, SH Back, CA Estabrook, KG Wallace, R Baker, K MacGowan, BJ Hammel, BA Cid, RE DeGroot, JS TI Observation of two ion-acoustic waves in a two-species laser-produced plasma with Thomson scattering SO PHYSICAL REVIEW LETTERS LA English DT Article ID SPECTRUM AB We report the first observations of two separate ion-acoustic waves in a two-ion-species plasma with Thomson scattering. A flat disk coated with thin multilayers of gold and beryllium was irradiated with one laser beam, and the resulting two-ion-species plasma was probed with a second laser at a distance of 500 mu m. The phase velocities of the ion-acoustic waves are shown to be a sensitive function of the relative concentrations of the two-ion species. Moreover, an accurate measurement of the ion temperature can be derived from the relative damping of the two-ion-acoustic waves. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. UNIV CALIF DAVIS, PLASMA RES GRP, DAVIS, CA 95616 USA. UNIV CALIF DAVIS, DEPT APPL SCI, DAVIS, CA 95616 USA. RP Glenzer, SH (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94551 USA. NR 20 TC 59 Z9 59 U1 1 U2 6 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 AUG 19 PY 1996 VL 77 IS 8 BP 1496 EP 1499 DI 10.1103/PhysRevLett.77.1496 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600022 ER PT J AU Brizard, AJ Morehead, JJ Kaufman, AN Tracy, ER AF Brizard, AJ Morehead, JJ Kaufman, AN Tracy, ER TI Double-cross instability: An absolute instability caused by counter-propagating positive- and negative-energy waves SO PHYSICAL REVIEW LETTERS LA English DT Article ID LINEAR-MODE-CONVERSION; FUSION; EXCITATION; EMISSION; PRODUCTS AB The resonant interaction of a negative-energy wave with a positive-energy wave gives rise to a linear instability. Whereas a single crossing of rays in a nonuniform medium leads to a convectively saturated instability, we show that a double crossing can yield an absolute instability, if the two rays are oppositely directed. We obtain expressions for the growth rate and the threshold, and present one application. C1 COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185. RP Brizard, AJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. OI Brizard, Alain/0000-0002-0192-6273 NR 17 TC 8 Z9 8 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 AUG 19 PY 1996 VL 77 IS 8 BP 1500 EP 1503 DI 10.1103/PhysRevLett.77.1500 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600023 ER PT J AU Ginocchio, JN Haxton, WC AF Ginocchio, JN Haxton, WC TI A first-Landau-level Laughlin/Jain wave function for the fractional quantum Hall effect SO PHYSICAL REVIEW LETTERS LA English DT Article ID STATES; HIERARCHY; CONDUCTANCE; FLUID AB We show that the introduction of a more general closed-shell operator allows one to extend Laughlin's wave function to account for the richer hierarchies (1/3,2/5,3/7...; 1/5,2/9,3/13,...,etc.) found experimentally. The construction identifies the special hierarchy states with condensates of correlated electron clusters. This clustering implies a single-particle algebra within the first Landau level (LL) identical to that of multiply filled LLs in the integer quantum Hall effect. The end result is a simple generalized wave function that reproduces the results of both Laughlin and Jain, without reference to higher LLs or projection. C1 UNIV WASHINGTON,INST NUCL THEORY,SEATTLE,WA 98195. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. RP Ginocchio, JN (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 25 TC 13 Z9 13 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 AUG 19 PY 1996 VL 77 IS 8 BP 1568 EP 1571 DI 10.1103/PhysRevLett.77.1568 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600040 ER PT J AU Abulafia, Y Shaulov, A Wolfus, Y Prozorov, R Burlachkov, L Yeshurun, Y Majer, D Zeldov, E Wuhl, H Geshkenbein, VB Vinokur, VM AF Abulafia, Y Shaulov, A Wolfus, Y Prozorov, R Burlachkov, L Yeshurun, Y Majer, D Zeldov, E Wuhl, H Geshkenbein, VB Vinokur, VM TI Plastic vortex creep in YBa2Cu3O7-x crystals SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; FLUX-LINE-LATTICE; CU-O CRYSTALS; PHASE-DIAGRAM; SINGLE-CRYSTALS; MAGNETIZATION; RELAXATION; TRANSPORT; FILMS AB Local magnetic relaxation measurements in YBa2Cu3O7-x crystals show evidence for plastic vortex creep associated with the motion of dislocations in the vortex lattice. This creep mechanism governs the vortex dynamics in a wide range of temperatures and fields below the melting line and above the field corresponding to the peak in the ''fishtail'' magnetization. In this range the activation energy U-pl, which decreases with field, drops below the elastic (collective) creep activation energy, U-el, which increases with field. A crossover in flux dynamics from elastic to plastic creep is shown to be the origin of the fishtail in YBa2CU3O7-x. C1 WEIZMANN INST SCI,DEPT CONDENSED MATTER PHYS,IL-76100 REHOVOT,ISRAEL. UNIV KARLSRUHE,D-76021 KARLSRUHE,GERMANY. FORSCHUNGSZENTRUM KARLSRUHE,INST TECH PHYS,D-76021 KARLSRUHE,GERMANY. ETH HONGGERBERG,CH-8093 ZURICH,SWITZERLAND. LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA. ARGONNE NATL LAB,ARGONNE,IL 60439. RP Abulafia, Y (reprint author), BAR ILAN UNIV,DEPT PHYS,INST SUPERCONDUCT,IL-52900 RAMAT GAN,ISRAEL. RI Prozorov, Ruslan/A-2487-2008; Zeldov, Eli/K-1546-2012 OI Prozorov, Ruslan/0000-0002-8088-6096; Zeldov, Eli/0000-0002-8200-4974 NR 31 TC 226 Z9 227 U1 2 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 19 PY 1996 VL 77 IS 8 BP 1596 EP 1599 DI 10.1103/PhysRevLett.77.1596 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600047 ER PT J AU Mason, TE Schroder, A Aeppli, G Mook, HA Hayden, SM AF Mason, TE Schroder, A Aeppli, G Mook, HA Hayden, SM TI New magnetic coherence effect in superconducting La2-xSrxCuO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID COPPER-OXIDE SUPERCONDUCTORS; NEUTRON-SCATTERING; SPIN EXCITATIONS; FLUCTUATIONS; YBA2CU3O7; DYNAMICS; LA1.86SR0.14CUO4; LA1.85SR0.15CUO4; ELECTRONS; STATE AB We have used inelastic neutron scattering to examine the magnetic fluctuations at intermediate frequencies in the simplest high temperature superconductor, La2-xSrxCuO4. The suppression of the low energy magnetic response in the superconducting state is accompanied by an increase in the response at higher energies. Just above a threshold energy of similar to 7 meV there is additional scattering present below T-c which is characterized by an extraordinarily long coherence length, in excess of 50 Angstrom. C1 RISO NATL LAB,DEPT SOLID STATE PHYS,DK-4000 ROSKILDE,DENMARK. NEC RES INST,PRINCETON,NJ 08540. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. RP Mason, TE (reprint author), UNIV TORONTO,DEPT PHYS,TORONTO,ON M5S 1A7,CANADA. RI Hayden, Stephen/F-4162-2011; Mason, Thomas/M-5809-2014 OI Hayden, Stephen/0000-0002-3209-027X; Mason, Thomas/0000-0003-1880-3971 NR 33 TC 95 Z9 95 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 19 PY 1996 VL 77 IS 8 BP 1604 EP 1607 DI 10.1103/PhysRevLett.77.1604 PG 4 WC Physics, Multidisciplinary SC Physics GA VC336 UT WOS:A1996VC33600049 ER PT J AU Nieto, MM AF Nieto, MM TI Analytic description of the motion of a trapped ion in an even or odd squeezed state SO PHYSICS LETTERS A LA English DT Article ID COHERENT AB A completely analytic description is given of the motion of a trapped ion which is in either an even or an odd squeezed state. A comparison is made with recent results on the even or odd coherent states, and possible experimental work is discussed. RP Nieto, MM (reprint author), LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. NR 10 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 19 PY 1996 VL 219 IS 3-4 BP 180 EP 186 DI 10.1016/0375-9601(96)00455-0 PG 7 WC Physics, Multidisciplinary SC Physics GA VE045 UT WOS:A1996VE04500008 ER PT J AU Witt, KL Bishop, JB AF Witt, KL Bishop, JB TI Mutagenicity of anticancer drugs in mammalian germ cells SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS LA English DT Review DE genetic toxicity; spermatocyte; oocyte; mouse; human risk; mutation ID DOMINANT-LETHAL MUTATIONS; CHEMICALLY-INDUCED ANEUPLOIDY; SYNAPTONEMAL COMPLEX DAMAGE; MOUSE BONE-MARROW; STRUCTURAL CHROMOSOME-ABERRATIONS; NATIONAL-TOXICOLOGY-PROGRAM; SPERMATOGONIAL STEM-CELLS; METAPHASE-II OOCYTES; MALE-RAT MEIOSIS; MALE-MICE AB The evidence for mammalian germ cell mutagenicity induced by anticancer drugs is summarized. Primary attention is paid to the three major mouse germ cell mutagenicity tests - the dominant lethal, heritable translocation, and morphological specific locus tests - from which most germ cell mutagenicity data historically have been obtained. Of the 21 anticancer drugs reviewed, 16 have been tested in one or more of these three tests; with all 16 tested in the most common germ cell test, the male dominant lethal test, and 9 of the 16 also tested in the female dominant lethal test. The patterns of germ cell stage specificity for most of the anticancer drugs are similar, and generally resemble the patterns seen with other types of chemicals; however, some of the patterns are unique. For example, 2 of the 8 chemicals shown to induce dominant lethal mutations in female oocytes, do not induce dominant lethal mutations in male germ cells (adriamycin and platinol). Ten of the 16 chemicals tested in the dominant lethal test were positive in post-meiotic stages (spermatids through mature sperm), and seven also induced reciprocal translocations and/or specific locus mutations in post-meiotic stages. This propensity to induce mutations in post-meiotc stages has been observed with most mutagens. However, 5 of the anticancer drugs also induced dominant lethal mutations in spermatocytes (meiotic prophase cells) and one of them, 6-mercaptopurine, uniquely induced dominant lethal mutations exclusively in preleptotene spermatocytes. Finally, three of the anticancer drugs (melphalan, mitomycin C, procarbazine) are members of a very select group of chemicals shown to induce specific locus mutations in spermatogonial stem cells of mice, The implications for human risk are discussed. C1 OAK RIDGE INST SCI & EDUC,OAK RIDGE,TN 37831. RP Witt, KL (reprint author), NIEHS,POB 12233,RES TRIANGLE PK,NC 27709, USA. NR 186 TC 86 Z9 94 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0027-5107 J9 MUTAT RES-FUND MOL M JI Mutat. Res.-Fundam. Mol. Mech. Mutagen. PD AUG 17 PY 1996 VL 355 IS 1-2 BP 209 EP 234 DI 10.1016/0027-5107(96)00029-2 PG 26 WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology GA VE166 UT WOS:A1996VE16600011 PM 8781584 ER PT J AU Gregg, BA AF Gregg, BA TI Bilayer molecular solar cells on spin-coated TiO2 substrates SO CHEMICAL PHYSICS LETTERS LA English DT Article ID SEMICONDUCTORS; FILM AB Solar cells with 20 nm films of molecular semiconductors can be constructed without electrical shorts by depositing the organic layers onto spin-coated films of TiO2. The photovoltaic characteristics of a bilayer cell consisting of perylene bis(phenethylimide) and zinc phthalocyanine were measured and compared to those of the individual layers. The bilayer was much more efficient than either individual monolayer but did not behave as a classical p-n junction. It exhibited a short circuit photocurrent density of 1.5 mA/cm(2) and a wavelength-averaged short circuit quantum yield of 18% under 1 sun conditions. RP Gregg, BA (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 16 TC 60 Z9 61 U1 0 U2 13 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 AUG 16 PY 1996 VL 258 IS 3-4 BP 376 EP 380 DI 10.1016/0009-2614(96)00681-1 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VC071 UT WOS:A1996VC07100010 ER PT J AU Sarker, M Guiochon, G AF Sarker, M Guiochon, G TI Consolidation of the packing material in chromatographic columns under dynamic axial compression .3. Effect of the nature of the packing solvent on the consolidation and performance of axial compression columns SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE stationary phases, LC; dynamic axial compression; packing consolidation; axial compression columns; consolidation; packing solvent AB Consolidation characteristics were studied for axial compression columns packed with five different solvents, All the columns were packed with nearly the same amount of the same packing material. Their lengths were close to each other. HETP curves were measured with acetone as the probe and methanol as the eluting solvent. The experiments reported here confirmed previous ones carried out with heptane and methanol. The consolidation process appears to depend on the nature of the solvent. The bed obtained is more compact with heptane than with methanol. The other three solvents give packing densities close to the density obtained with methanol. However, using methanol, isopropanol, or acetone as packing solvent produces better columns than using acetonitrile or heptane. No obvious correlation was found between the packing density and the efficiency of the columns. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 9 TC 14 Z9 16 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 16 PY 1996 VL 741 IS 2 BP 165 EP 173 DI 10.1016/0021-9673(96)00158-6 PG 9 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA VE399 UT WOS:A1996VE39900002 ER PT J AU Stanley, BJ Sarker, M Guiochon, G AF Stanley, BJ Sarker, M Guiochon, G TI Consolidation of the packing material in chromatographic columns under dynamic axial compression .4. Mechanical properties of some packing materials SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE stationary phases, LC; packing consolidation; consolidation; dynamic axial compression; packing materials, mechanical properties; axial compression columns ID PREPARATIVE CHROMATOGRAPHY; BEHAVIOR AB Dynamic axial compression columns were packed with three C-18 silica materials used as stationary phases in preparative chromatography, one made of irregular and two of spherical particles, Measurements of column length vs. time and axial compression pressure, obtained for several columns, have been previously reported. These results are discussed here in terms of packing density, internal porosity, and external porosity, as allowed by the use of independent measurements of the density of the silica skeleton and the pore volume. The compressibilities and Young moduli of the columns are calculated and compared to results obtained in soils mechanics for various soil types. The results indicate that the preparative columns packed with silica particles exhibit a behavior intermediate between that of uniform fine and medium-sized sands. The angular silica material exhibits higher compressibility than both spherical silica materials on first compression. Upon recompression, one of the spherical silicas studied exhibits high compressibility and thus elasticity, suggesting a looser packing structure than the other spherical material; this is supported by calculation of the external porosities of the two materials, Results with respect to the kinetic theory of consolidation in soils mechanics are also presented. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. CALIF STATE COLL SAN BERNARDINO,DEPT CHEM,SAN BERNARDINO,CA 92407. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 14 TC 22 Z9 24 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 16 PY 1996 VL 741 IS 2 BP 175 EP 184 DI 10.1016/0021-9673(96)00163-X PG 10 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA VE399 UT WOS:A1996VE39900003 ER PT J AU Qian, H Chan, SI AF Qian, H Chan, SI TI Interactions between a helical residue and tertiary structures: Helix propensities in small peptides and in native proteins SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE helix stability; hydrogen-exchange; local fluctuation; minimal frustration; protein folding ID ALPHA-HELIX; FORMING PROPENSITIES; HYDROGEN-EXCHANGE; LAMBDA-REPRESSOR; AMINO-ACIDS; STABILITY; AMIDE; SECONDARY; ALANINE; BONDS AB We compare three complete sets of helix propensities for the 20 naturally occurring amino acids. These propensities are derived from three different experimental systems: small synthetic peptides, coiled-coil dimers, and real proteins. Thermodynamic analyses show that propensities from the different sets should be perfectly correlated if (1) the helix in a protein is formed when and only when the protein is folded (tight-coupling); and (2) the amino acid side-chains are not involved in tertiary interactions. A simple thermodynamic model is proposed in order to understand those systems that fail (1). The model incorporates fluctuations in both native and unfolded states of the protein. Measurements on hydrogen-exchange rate from proteins also question the validity of (2). A complementary model that assumes a cooperation between helix formation and tertiary structures through side-chain interactions can explain the correlation between data from the peptides and proteins. One possible source of this side-chain tertiary interaction is the amphiphilicity of helices in proteins. Our model is consistent with the ideas of ''minimal frustration'' and ''protein malleability''; it exhibits entropy-enthalpy compensation, and suggests that local unfolding and solvent penetration are correlated in a fluctuating protein. It also suggests experiments to quantitatively verify and differentiate between the models. The electrostatic nature of hydrogen bonding and its manifestations in protein helix stability is also discussed. (C) 1996 Academic Press Limited C1 UNIV CALIF LOS ANGELES, DOE, LAB STRUCT BIOL & MOL MED, LOS ANGELES, CA 90095 USA. CALTECH, DIV CHEM & CHEM ENGN, PASADENA, CA 91125 USA. RP Qian, H (reprint author), UNIV CALIF LOS ANGELES, DEPT BIOMATH, LOS ANGELES, CA 90095 USA. NR 39 TC 20 Z9 20 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 16 PY 1996 VL 261 IS 2 BP 279 EP 288 DI 10.1006/jmbi.1996.0459 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VC335 UT WOS:A1996VC33500017 PM 8757294 ER PT J AU Seiders, BAB AF Seiders, BAB TI Schrodinger's cat at hand SO SCIENCE LA English DT Letter RP Seiders, BAB (reprint author), PACIFIC NW NATL LAB,RICHLAND,WA 99352, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD AUG 16 PY 1996 VL 273 IS 5277 BP 860 EP 860 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC670 UT WOS:A1996VC67000014 ER PT J AU Lowndes, DH Geohegan, DB Puretzky, AA Norton, DP Rouleau, CM AF Lowndes, DH Geohegan, DB Puretzky, AA Norton, DP Rouleau, CM TI Synthesis of novel thin-film materials by pulsed laser deposition SO SCIENCE LA English DT Article ID AMORPHIC DIAMOND FILMS; CARBON-FILMS; YBA2CU3O7-X/PRBA2CU3O7-X SUPERLATTICES; EXCIMER-LASER; ABLATION; EVAPORATION; GROWTH; SUPERCONDUCTIVITY; MAGNETORESISTANCE; SPECTROSCOPY AB Pulsed laser deposition (PLD) is a conceptually and experimentally simple yet highly versatile tool for thin-film and multilayer research. Its advantages for the film growth of oxides and other chemically complex materials include stoichiometric transfer, growth from an energetic beam, reactive deposition, and inherent simplicity for the growth of multilayered structures. With the use of PLD, artificially layered materials and metastable phases have been created and their properties varied by control of the layer thicknesses. In situ monitoring techniques have provided information about the role of energetic species in the formation of ultrahard phases and in the doping of semiconductors. Cluster-assembled nanocrystalline and composite films offer opportunities to control and produce new combinations of properties with PLD. C1 RUSSIAN ACAD SCI, INST SPECT, TROITSK 142092, RUSSIA. RP Lowndes, DH (reprint author), OAK RIDGE NATL LAB, DIV SOLID STATE, POB 2008, OAK RIDGE, TN 37831 USA. RI Rouleau, Christopher/Q-2737-2015; Puretzky, Alexander/B-5567-2016; Geohegan, David/D-3599-2013 OI Rouleau, Christopher/0000-0002-5488-3537; Puretzky, Alexander/0000-0002-9996-4429; Geohegan, David/0000-0003-0273-3139 NR 56 TC 372 Z9 374 U1 24 U2 168 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 AUG 16 PY 1996 VL 273 IS 5277 BP 898 EP 903 DI 10.1126/science.273.5277.898 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC670 UT WOS:A1996VC67000037 ER PT J AU McKay, DS Gibson, EK ThomasKeprta, KL Vali, H Romanek, CS Clemett, SJ Chillier, XDF Maechling, CR Zare, RN AF McKay, DS Gibson, EK ThomasKeprta, KL Vali, H Romanek, CS Clemett, SJ Chillier, XDF Maechling, CR Zare, RN TI Search for past life on Mars: Possible relic biogenic activity in Martian meteorite ALH84001 SO SCIENCE LA English DT Article ID POLYCYCLIC AROMATIC-HYDROCARBONS; RECENT LAKE-SEDIMENTS; SNC METEORITES; MAGNETOTACTIC BACTERIA; ISOTOPIC COMPOSITION; WEATHERING PRODUCTS; MURCHISON METEORITE; SINGLE-DOMAIN; CARBON; MAGNETITE AB Fresh fracture surfaces of the martian meteorite ALH84001 contain abundant polycyclic aromatic hydrocarbons (PAHs). These fresh fracture surfaces also display carbonate globules. Contamination studies suggest that the PAHs are indigenous to the meteorite. High-resolution scanning and transmission electron microscopy study of surface textures and internal structures of selected carbonate globules show that the globules contain fine-grained, secondary phases of single-domain magnetite and Fe-sulfides. The carbonate globules are similar in texture and size to some terrestrial bacterially induced carbonate precipitates. Although inorganic formation is possible, formation of the globules by biogenic processes could explain many of the observed features, including the PAHs. The PAHs, the carbonate globules, and their associated secondary mineral phases and textures could thus be fossil remains of a past martian biota. C1 NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058. NASA,HOUSTON,TX 77058. MCGILL UNIV,DEPT EARTH & PLANETARY SCI,MONTREAL,PQ H3A 2A7,CANADA. UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. RP McKay, DS (reprint author), NASA,LYNDON B JOHNSON SPACE CTR,MAIL CODE SN,HOUSTON,TX 77058, USA. RI Zare, Richard/A-8410-2009; Vali, Hojatollah/F-3511-2012; Wright, Dawn/A-4518-2011 OI Vali, Hojatollah/0000-0003-3464-9943; Wright, Dawn/0000-0002-2997-7611 NR 87 TC 1058 Z9 1099 U1 42 U2 312 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD AUG 16 PY 1996 VL 273 IS 5277 BP 924 EP 930 DI 10.1126/science.273.5277.924 PG 7 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC670 UT WOS:A1996VC67000052 PM 8688069 ER PT J AU Nellis, WJ Weir, ST Mitchell, AC AF Nellis, WJ Weir, ST Mitchell, AC TI Metallization and electrical conductivity of hydrogen in Jupiter SO SCIENCE LA English DT Article ID GIANT PLANETS; MOLECULAR-HYDROGEN; SOLID HYDROGEN; STATE; PRESSURES; EQUATION; INTERIOR AB Electrical conductivities of molecular hydrogen in Jupiter were calculated by scaling electrical conductivities measured at shock pressures in the range of 10 to 180 gigapascals (0.1 to 1.8 megabars) and temperatures to 4000 kelvin, representative of conditions inside Jupiter. Jupiter's magnetic field is caused by convective dynamo motion of electrically conducting fluid hydrogen. The data imply that Jupiter should become metallic at 140 gigapascals in the fluid, and the electrical conductivity in the jovian molecular envelope at pressures up to metallization is about an order of magnitude larger than expected previously. The large magnetic field is produced in the molecular envelope closer to the surface than previously thought. RP Nellis, WJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Weir, Samuel/H-5046-2012 NR 32 TC 76 Z9 78 U1 1 U2 7 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD AUG 16 PY 1996 VL 273 IS 5277 BP 936 EP 938 DI 10.1126/science.273.5277.936 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC670 UT WOS:A1996VC67000055 PM 8688072 ER PT J AU Sabel, DM Thompson, JA Butcher, R Smith, PH AF Sabel, DM Thompson, JA Butcher, R Smith, PH TI 2-carboxy-9-dihydroxymethyl-1,10-phenanthroline complexes of cobalt(II) and copper(II) SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID CRYSTAL; 5-COORDINATE; CRYPTANDS; LIGANDS; HYDRATE; BOND AB Bis(9-dihydroxymethyl-1,10-phenanthroline-2-caiboxylato-N,N',O)cobalt(II) hydrate, [Co(C14H9N2O4)(2)].H2O, and bis(9-dihydroxymethyl-1,10-phenanthroline-2-carboxylato-N,N',O)copper(II) hydrate, [Cu(C14H9N2O4)(2)].H2O, are isostructural. The stable gem-diol ligands are tridentate (two N atoms and one carboxylate O atom) and form a distorted octahedron around the metal center. The total bite angle of the ligand is approximately 150 degrees. C1 HOWARD UNIV,WASHINGTON,DC 20059. RP Sabel, DM (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 17 TC 4 Z9 4 U1 1 U2 1 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD AUG 15 PY 1996 VL 52 BP 1950 EP 1954 DI 10.1107/S010827019600443X PN 8 PG 5 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA VG082 UT WOS:A1996VG08200036 ER PT J AU Weiss, JA Maker, BN Govindjee, S AF Weiss, JA Maker, BN Govindjee, S TI Finite element implementation of incompressible, transversely isotropic hyperelasticity SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING LA English DT Article ID FORMULATION; MYOCARDIUM; ELASTICITY; EQUATIONS; TISSUE; MODEL AB This paper describes a three-dimensional constitutive model for biological soft tissues and its finite element implementation for fully incompressible material behavior. The necessary continuum mechanics background is presented, along with derivations of the stress and elasticity tensors for a transversely isotropic, hyperelastic material. A particular form of the strain energy for biological soft tissues is motivated and a finite element implementation of this model based on a three-field variational principle (deformation, pressure and dilation) is discussed. Numerical examples are presented that demonstrate the utility and effectiveness of this approach for incompressible, transversely isotropic materials. C1 UNIV UTAH,ORTHOPED BIOMECH INST,SALT LAKE CITY,UT 84107. LIVERMORE SOFTWARE TECHNOL CORP,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,DEPT CIVIL ENGN,BERKELEY,CA 94720. RP Weiss, JA (reprint author), LAWRENCE LIVERMORE NATL LAB,APPL MECH GRP,LIVERMORE,CA 94550, USA. RI Govindjee, Sanjay/B-6886-2008 OI Govindjee, Sanjay/0000-0003-0711-3633 NR 34 TC 384 Z9 396 U1 5 U2 48 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0045-7825 J9 COMPUT METHOD APPL M JI Comput. Meth. Appl. Mech. Eng. PD AUG 15 PY 1996 VL 135 IS 1-2 BP 107 EP 128 DI 10.1016/0045-7825(96)01035-3 PG 22 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications; Mechanics SC Engineering; Mathematics; Mechanics GA VH435 UT WOS:A1996VH43500006 ER PT J AU Yang, RQ Lin, CH Chang, PC Murry, SJ Zhang, D Pei, SS Kurtz, SR Chu, AN Ren, F AF Yang, RQ Lin, CH Chang, PC Murry, SJ Zhang, D Pei, SS Kurtz, SR Chu, AN Ren, F TI Mid-IR interband cascade electroluminescence in type-II quantum wells SO ELECTRONICS LETTERS LA English DT Article DE semiconductor quantum wells; electroluminescence ID MU-M; LASER AB The authors report the first observation of mid-infrared interband cascade electroluminescence in a staircase of Sb-based type-II quantum well structures. The electroluminescence has been observed up to room temperature, and its optical output power depends only weakly on temperature. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. AT&T BELL LABS,LUCENT TECHNOL,MURRAY HILL,NJ 07974. RP Yang, RQ (reprint author), UNIV HOUSTON,CTR SPACE VACUUM EPITAXY,HOUSTON,TX 77203, USA. NR 9 TC 32 Z9 33 U1 0 U2 5 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD AUG 15 PY 1996 VL 32 IS 17 BP 1621 EP 1622 DI 10.1049/el:19961049 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA VF336 UT WOS:A1996VF33600066 ER PT J AU Lindqvist, Y Huang, WJ Schneider, G Shanklin, J AF Lindqvist, Y Huang, WJ Schneider, G Shanklin, J TI Crystal structure of Delta(9) stearoyl-acyl carrier protein desaturase from castor seed and its relationship to other di-iron proteins SO EMBO JOURNAL LA English DT Article DE di-iron centre; electron transfer; fatty acid biosynthesis; protein crystallography ID THUNBERGIA-ALATA ENDOSPERM; FATTY-ACID METABOLISM; RIBONUCLEOTIDE REDUCTASE; ESCHERICHIA-COLI; COA DESATURASE; ACTIVE-SITE; MONOOXYGENASE; PURIFICATION; HYDROXYLASE; REFINEMENT AB The three-dimensional structure of recombinant homodimeric Delta(9) stearoyl-acyl carrier protein desaturase, the archetype of the soluble plant fatty acid desaturases that convert saturated to unsaturated fatty acids, has been determined by protein crystallographic methods to a resolution of 2.4 Angstrom. The structure was solved by a combination of single isomorphous replacement, anomalous contribution from the iron atoms to the native diffraction data and 6-fold non-crystallographic symmetry averaging, The 363 amino acid monomer consists of a single domain of 11 alpha-helices, Nine of these form an antiparallel helix bundle, The enzyme subunit contains a di-iron centre, with ligands from four of the alpha-helices in the helix bundle, The iron ions are bound in a highly symmetric environment, with one of the irons forming interactions with the side chains of E196 and H232 and the second iron with the side chains of E105 and H146. Two additional glutamic acid side chains, from E143 and E229, are within coordination distance to both iron ions. A water molecule is found within the second coordination sphere from the iron atoms, The lack of electron density corresponding to a mu-oxo bridge, and the long (4.2 Angstrom) distance between the iron ions suggests that this probably represents the diferrous form of the enzyme, A deep channel which probably binds the fatty acid extends from the surface into the interior of the enzyme, Modelling of the substrate, stearic acid, into this channel places the Delta(9) carbon atom in the vicinity of one of the iron ions. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RP Lindqvist, Y (reprint author), KAROLINSKA INST,DEPT MED BIOCHEM & BIOPHYS,DIV STRUCT BIOL,DOKTORSRINGEN 4,S-17177 STOCKHOLM,SWEDEN. RI Lindqvist, Ylva/F-9009-2010 NR 48 TC 323 Z9 341 U1 2 U2 15 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0261-4189 J9 EMBO J JI Embo J. PD AUG 15 PY 1996 VL 15 IS 16 BP 4081 EP 4092 PG 12 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA VE353 UT WOS:A1996VE35300001 PM 8861937 ER PT J AU Lubeck, J Soll, J Akita, M Nielsen, E Keegstra, K AF Lubeck, J Soll, J Akita, M Nielsen, E Keegstra, K TI Topology of IEP110, a component of the chloroplastic protein import machinery present in the inner envelope membrane SO EMBO JOURNAL LA English DT Article DE chloroplast; envelope; import; Pisum sativum L; precursor protein ID PRECURSOR PROTEINS; OUTER ENVELOPE; POLYACRYLAMIDE GELS; IDENTIFICATION; TRANSLOCATION; APPARATUS; BINDING; COMPLEX; NITROCELLULOSE; MITOCHONDRIA AB Proteins from both the inner and outer envelope membranes are engaged in the recognition and translocation of precursor proteins into chloroplasts, A 110 kDa protein of the chloroplastic inner envelope membrane was identified as a component of the protein import apparatus by two methods, First, this protein was part of a 600 kDa complex generated by crosslinking of precursors trapped in the translocation process. Second, solubilization with detergents of chloroplasts containing trapped precursors resulted in the identification of a complex containing both radiolabeled precursor and IEP110, Trypsin treatment of intact purified chloroplasts was used to study the topology of IEP110. The protease treatment left the inner membrane intact while simultaneously degrading domains of inner envelope proteins exposed to the intermembrane space, About 90 kDa of IEP110 was proteolitically removed, indicating that large portions protrude into the intermembrane space, Hydropathy analysis of the protein sequence deduced from the isolated cDNA clone in addition to Western blot analysis using an antiserum of IEP110 specific to the N-terminal 20 kDa, suggests that the N-terminus serves to anchor the protein in the membrane, We speculate that IEP110 could be involved in the formation of translocation contact sites due to its specific topology. C1 CHRISTIAN ALBRECHTS UNIV KIEL, INST BOT, D-24098 KIEL, GERMANY. MICHIGAN STATE UNIV, US DOE, PLANT RES LAB, E LANSING, MI 48824 USA. RI Nielsen, Erik/G-5843-2013 NR 43 TC 110 Z9 115 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0261-4189 EI 1460-2075 J9 EMBO J JI Embo J. PD AUG 15 PY 1996 VL 15 IS 16 BP 4230 EP 4238 PG 9 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA VE353 UT WOS:A1996VE35300015 PM 8861951 ER PT J AU Gruen, JR Nalabolu, SR Chu, TW Bowlus, C Fan, WF Goei, VL Wei, H Sivakamasundari, R Liu, YC Xu, HX Parimoo, S Nallur, G Ajioka, R Shukla, H BrayWard, P Pan, J Weissman, SM AF Gruen, JR Nalabolu, SR Chu, TW Bowlus, C Fan, WF Goei, VL Wei, H Sivakamasundari, R Liu, YC Xu, HX Parimoo, S Nallur, G Ajioka, R Shukla, H BrayWard, P Pan, J Weissman, SM TI A transcription map of the major histocompatibility complex (MHC) class I region SO GENOMICS LA English DT Review ID MYELIN OLIGODENDROCYTE GLYCOPROTEIN; HEMOCHROMATOSIS GENE HFE; LINKAGE DISEQUILIBRIUM; IMMUNOGLOBULIN SUPERFAMILY; NUCLEOTIDE-SEQUENCE; FINGER PROTEIN; CDNA SELECTION; HUMAN HOMOLOG; CELL-LINE; HLA-B AB We have applied cDNA hybridization selection to nine YACs spanning 3 Mb of genomic DNA from a region centromeric to HLA-A to the histone cluster that lies telomeric to the human major histocompatibility complex (MHC). In addition to Class I genes and pseudogenes, we describe over 63 genes and 23 additional expressed sequence tags distributed throughout the region. Many of the full-length genes belong to gene families. Prominent among these are a group of genes encoding proteins showing homology to the carboxyl-terminal sequences of butyrophilin and an additional group of zinc finger genes. We also detected several previously undefined genes that are specifically expressed in cells of the immune system, indicating a more complex role of the MHC in the immune response than has been appreciated. (C) 1996 Academic Press, Inc. C1 YALE UNIV,SCH MED,DEPT GENET,NEW HAVEN,CT 06510. YALE UNIV,SCH MED,DEPT INTERNAL MED,NEW HAVEN,CT 06510. UNIV UTAH,SCH MED,DIV HEMATOL ONCOL,SALT LAKE CITY,UT 84112. LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,LIVERMORE,CA 94551. RW JOHNSON PHARMACEUT RES INST,SKIN BIOL CTR,RARITAN,NJ 08869. BIOGEN INC,CAMBRIDGE,MA 02142. SMITHKLINE BEECHAM PHARMACEUT,KING OF PRUSSIA,PA 19406. RP Gruen, JR (reprint author), YALE UNIV,SCH MED,DEPT PEDIAT,333 CEDAR ST,NEW HAVEN,CT 06510, USA. RI Bowlus, Christopher/N-9276-2016 OI Bowlus, Christopher/0000-0002-3906-6811 FU NCI NIH HHS [CA42556-10]; NIDDK NIH HHS [1R29DK45819-03, DK02303-01] NR 103 TC 36 Z9 36 U1 2 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD AUG 15 PY 1996 VL 36 IS 1 BP 70 EP 85 DI 10.1006/geno.1996.0427 PG 16 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA VD246 UT WOS:A1996VD24600009 PM 8812418 ER PT J AU Kuhen, KL Shen, XY Carlisle, ER Richardson, AL Weier, HUG Tanaka, H Samuel, CE AF Kuhen, KL Shen, XY Carlisle, ER Richardson, AL Weier, HUG Tanaka, H Samuel, CE TI Structural organization of the human gene (PKR) encoding an interferon-inducible RNA-Dependent protein kinase (PKR) and differences from its mouse homolog SO GENOMICS LA English DT Article ID DOUBLE-STRANDED-RNA; HUMAN-CELLS; IN-VIVO; MECHANISM; EXPRESSION; CHROMOSOME-2P21-P22; SYSTEM; PRKR; SITE AB The gene encoding the interferon-inducible, RNA-dependent protein kinase (PKR) was isolated as lambda phage and P1 phage clones from human genomic DNA libraries and characterized by Southern blot and nucleotide sequence analyses. Southern blot analyses were consistent with a single PKR gene, and genomic clones colocalized by fluorescence in situ hybridization to human chromosome 2p. Sequence analysis demonstrated that the human PKR gene consists of 17 exons and spans about 50 kb. The AUG translation initiation site for the 551-amino-acid PKR protein was located in exon 3; exon 17 was the largest exon and included the UAG translation termination site, AUU-AAA polyadenylation signal, and putative C(A) 3' cleavage site. Two RNA-binding motifs, R(I) and R(II), were present in exons 4 and 6, respectively, and the codon phasing of these exon junctions was conserved between them. The organization of the regulatory and catalytic subdomains of the PKR protein was remarkably preserved between the human and the mouse PKR genes; the amino acid junction positions for 13 of the 15 protein coding exons were exactly conserved. (C) 1996 Academic Press, Inc. C1 UNIV CALIF SANTA BARBARA,DEPT MOL CELLULAR & DEV BIOL,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,INTERDEPT GRAD PROGRAM BIOCHEM & MOL BIOL,SANTA BARBARA,CA 93106. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,CTR MOL CYTOGENET,DIV LIFE SCI,BERKELEY,CA 94720. FU NIAID NIH HHS [AI-20611] NR 35 TC 37 Z9 41 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD AUG 15 PY 1996 VL 36 IS 1 BP 197 EP 201 DI 10.1006/geno.1996.0446 PG 5 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA VD246 UT WOS:A1996VD24600028 PM 8812437 ER PT J AU Jeong, SH Greif, R Russo, RE AF Jeong, SH Greif, R Russo, RE TI Laser heating of a cavity versus a plane surface for metal targets utilizing photothermal deflection measurements SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID BEAM-DEFLECTION; KEYHOLE; PLASMA; SOLIDS; SPECTROSCOPY; MODEL AB The effects of a cylindrical cavity in a metal surface on the energy coupling of a laser beam with the solid were investigated by using a photothermal deflection technique. The photothermal deflection of a probe beam over the cavity was measured while the bottom of the cavity was heated with a Nd-YAG laser with a wavelength of 1064 nm. Cavities in three different materials and with two different aspect ratios were used for the experiment. Temperature distributions in the solid and the surrounding air were computed numerically and used to calculated photothermal deflections for cavity heating and for plane surface heating. Reflection of the heating laser beam inside the cavity increased the photothermal deflection amplitude significantly with larger increases for materials with larger thermal diffusivity. The computed photothermal deflections agreed more closely with the experimental results when reflection of the heating laser beam inside the cavity was included in the numerical model. The overall energy coupling between a heating laser and a solid is enhanced by a cavity. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720. NR 19 TC 16 Z9 16 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1996 VL 80 IS 4 BP 1996 EP 2002 DI 10.1063/1.363092 PG 7 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200008 ER PT J AU Pointon, TD Desjarlais, MP AF Pointon, TD Desjarlais, MP TI Three-dimensional, particle-in-cell simulations of applied-B ion diodes on the particle beam fusion accelerator II SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTROMAGNETIC STABILITY; ELECTRON FLOW; DIVERGENCE AB We have used the three-dimensional, particle-in-cell code QUICKSILVER [J. P. Quintenz, et al., Lasers and Particle Beams 12, 283 (1994)] to simulate radial applied-B ion diodes on the particle beam fusion accelerator II at Sandia National Laboratories. The simulations agree well with experiments early in the beam pulse, but differ substantially as the ion-beam current increases. This is attributed to the oversimplified ion emission model. We see the same instabilities seen in earlier simulations with idealized diode geometries; Early in time there is a diocotron instability, followed by a transition to an ''ion mode'' instability at much lower frequency. The instability-induced beam divergence for the similar to 10 MeV beam during the diocotron phase is <10 mrad, significantly less than the total beam divergence in experiments early in the pulse, but increases to >25 mrad after the transition. The ion mode has a distinct harmonic structure along the applied field lines, making the instability transition sensitive to the diode geometry. The ion mode instability in our latest simulations is consistent with evidence of instabilities from recent experiments. RP Pointon, TD (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 29 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1996 VL 80 IS 4 BP 2079 EP 2093 DI 10.1063/1.363100 PG 15 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200018 ER PT J AU Zolper, JC Klem, JF Baca, AG Sherwin, ME Hafich, MJ Drummond, TJ AF Zolper, JC Klem, JF Baca, AG Sherwin, ME Hafich, MJ Drummond, TJ TI n-type ion implantation doping of AlxGa1-xAs (0<=x<=0.7) SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GAAS; TECHNOLOGY; ACTIVATION AB Si-implant activation characteristics in AlxGa1-xAs for Al compositions of 0%-70% AlAs are presented for doses of 5.6X10(12) and 2.8 X 10(13) cm(-2) at 100 keV. For both doses, the effective activation efficiency (eta(eff)) is relatively constant from 0% to 20% AlAs (eta(eff)=64% for 5.6X10(12) cm(-2) and 37% for 2.8X10(13) cm(-2) for 20% AlAs), goes through a minimum at 35% AlAs (eta(eff)=6.6% for 5.6X10(12) cm(-2) and 2.5% for 2.8X10(13) cm(-2)), and then increases towards 70% AlAs (eta(eff)=52.8% for 5.6X10(12) cm(-2) and 31.1% for 2.8X10(13) cm(-2)). The results are explained based on the compositional dependence of the ionization energy and conduction band density-of-states of AlGaAs. The effects of P coimplantation is also studied but demonstrates no significant enhancement of the activation efficiency of Si implantation for 0%-70% AlAs. Finally, data are presented for Se implantation in Al0.2Ga0.8As with a maximum effective activation efficiency of 5.6% achieved. (C) 1996 American Institute of Physics. RP Zolper, JC (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 20 TC 1 Z9 1 U1 3 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1996 VL 80 IS 4 BP 2132 EP 2137 DI 10.1063/1.363556 PG 6 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200025 ER PT J AU Gassmann, A Suski, T Newman, N Kisielowski, C Jones, E Weber, ER LilientalWeber, Z Rubin, MD Helava, HI Grzegory, I Bockowski, M Jun, J Porowski, S AF Gassmann, A Suski, T Newman, N Kisielowski, C Jones, E Weber, ER LilientalWeber, Z Rubin, MD Helava, HI Grzegory, I Bockowski, M Jun, J Porowski, S TI Homoepitaxial growth of GaN using molecular beam epitaxy SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID VAPOR-PHASE EPITAXY; BUFFER LAYER; SUBSTRATE AB In this article, experimental results are presented for the homoepitaxial deposition of a GaN overlayer onto a bulk single-crystal GaN substrate using molecular beam epitaxy. Transmission electron microscopy shows a superior structural quality of the deposited GaN overlayer when compared to heteroepitaxially grown layers. Photoluminescence shows narrow excitonic emission (3.467 eV) and the very weak yellow luminescence, whereas the bulk substrate luminescence is dominated by this deep level emission. These results show that homoepitaxy of GaN can be used to establish benchmark values for the optoelectronic properties of GaN thin films. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI,BERKELEY,CA 94720. AMER XTAL TECHNOL,DUBLIN,CA 94568. POLISH ACAD SCI,UNIPRESS,PL-01142 WARSAW,POLAND. RI Newman, Nathan/E-1466-2011; Liliental-Weber, Zuzanna/H-8006-2012 OI Newman, Nathan/0000-0003-2819-9616; NR 13 TC 30 Z9 30 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1996 VL 80 IS 4 BP 2195 EP 2198 DI 10.1063/1.363112 PG 4 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200033 ER PT J AU Lee, JW Lee, KN Pearton, SJ Abernathy, CR Hobson, WS Han, H Zolper, JC AF Lee, JW Lee, KN Pearton, SJ Abernathy, CR Hobson, WS Han, H Zolper, JC TI Si, Be, and C ion implantation in GaAs0.93P0.07 SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MOLECULAR-BEAM EPITAXY; GAAS; CARBON; COIMPLANTATION; ALGAAS; ENERGY; INP AB The activation efficiencies of implanted Si, Be, and C in GaAs0.93P0.07 have been measured in the annealing range 650-950 degrees C. Be provides much higher sheet hole densities than C, even when the latter is coimplanted with Ar to enhance the electrical activity. The maximum activation efficiency of Be is similar to 60% at a close of 5X10(14) cm(2) whereas that of C is an order of magnitude lower, Si produces donor activation percentages up to similar to 20% under optimized annealing conditions. Capless proximity annealing is adequate for surface preservation up to similar to 950 degrees C as measured by scanning electron microscopy and atomic force microscopy. Photoluminescence measurements provide evidence that nonradiative, damage-related point defects remain in the GaAsP even after annealing or 950 degrees C. (C) 1996 American Institute of Physics. C1 UNIV FLORIDA,GAINESVILLE,FL 32611. AT&T BELL LABS,MURRAY HILL,NJ 07974. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 25 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1996 VL 80 IS 4 BP 2296 EP 2299 DI 10.1063/1.363059 PG 4 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200046 ER PT J AU Kuo, SC Kuo, SP AF Kuo, SC Kuo, SP TI Monte Carlo simulation of electron behavior in an electron cyclotron resonance microwave discharge sustained by circular TM(11) mode fields SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; CARBON-FILMS; PLASMA; ECR AB Electron behavior is an electron cyclotron resonance microwave discharge sustained by TM(11) mode fields of a cylindrical waveguide has been investigated via a Monte Carlo simulation. The time averaged, spatially dependent electron energy distribution is computed self-consistently. At low pressures (similar to 0.5 mTorr), the temperature of the tail portion of the electron energy distribution exceeds 40 eV, and the sheath potential is about -250 V. These results, which are about twice as high as the previous results for TM(01) mode fields [S. C. Kuo, E. E. Kunhardt, and S. P. Kuo, J. Appl. Phys. 73, 4197 (1993)], suggest that TM(11) mode fields have a stronger electron cyclotron resonance effect than TM(01) mode fields in a cylindrical waveguide. (C) 1996 American Institute of Physics. C1 POLYTECH INST NEW YORK, WEBER RES INST, FARMINGDALE, NY 11735 USA. RP Kuo, SC (reprint author), BROOKHAVEN NATL LAB, DEPT APPL SCI, BLDG 815, UPTON, NY 11973 USA. NR 16 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 AUG 15 PY 1996 VL 80 IS 4 BP 2512 EP 2514 DI 10.1063/1.363033 PG 3 WC Physics, Applied SC Physics GA VD532 UT WOS:A1996VD53200080 ER PT J AU Murdoch, KM Edelstein, NM Boatner, LA Abraham, MM AF Murdoch, KM Edelstein, NM Boatner, LA Abraham, MM TI Excited state absorption and fluorescence in narrowing studies of Cm3+ in LuPO4 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID FIELD AB Laser selective excitation, fluorescence line narrowing, and excited state absorption techniques have been used to investigate the electronic-energy-level structure of the 5f(7) ion Cm3+ in the host crystal LuPO4. Crystal-field levels have been determined up to 35 700 cm(-1) for the principal D-2d symmetry site, Eighty levels have been assigned and fitted to a parametric Hamiltonian with an rms deviation of 28.4 cm(-1). Inhomogeneous broadening of the electronic transitions and the small 9.5 cm(-1) splitting of the nominally S-8(7/2) ground multiplet are responsible for satellite lines reported previously. Time resolved fluorescence line narrowing was used to observe energy transfer between different subsites of the intrinsic Cm3+ center. It was found that electric-dipole interactions mediate this energy transfer. (C) 1996 American Institute of Physics. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP Murdoch, KM (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 12 TC 30 Z9 30 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 1996 VL 105 IS 7 BP 2539 EP 2546 DI 10.1063/1.472118 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VB452 UT WOS:A1996VB45200001 ER PT J AU Zhao, YX deBeer, E Neumark, DM AF Zhao, YX deBeer, E Neumark, DM TI Rotationally resolved spectrum of the C (2)Pi(u)<-X (2)Pi(g) electronic transition of C-4(-) via resonant two-photon detachment spectroscopy SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID THRESHOLD PHOTODETACHMENT SPECTROSCOPY; SMALL CARBON CLUSTERS; ULTRAHIGH-RESOLUTION; COUPLED-CLUSTER; AUTODETACHMENT; IONS; C-2; AFFINITIES; MOLECULES; CHAINS AB The C (2) Pi(u)<--X( )2 Pi(g) electronic transition of C-4(-) has been studied by both one-color and two-color resonant two-photon detachment (R2PD) spectroscopy. The one-color spectrum reveals vibrational structure in the excited anion state. Transitions due to excitations in one of the symmetric stretching modes as well as the bending modes are observed. Spectral resolution in the one-color experiment is limited by power broadening; using two-color R2PD, rotationally resolved spectra of the origin and 2(0)(1) bands of the C (2) Pi(u)<--X (2) Pi(g) transition are obtained. Molecular constants determined by fitting the rotationally resolved spectra are generally in good agreement with a recent ab initio calculation by Schmatz and Botschwina [Int. J. Mass. Spec. Ion. Proc. 149, 621 (1995)]. Perturbations in the 2(0)(1) band are attributed to Fermi resonance interactions in the C (2) Pi(u) state. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 92470. RP Zhao, YX (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Neumark, Daniel/B-9551-2009 OI Neumark, Daniel/0000-0002-3762-9473 NR 39 TC 36 Z9 36 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 1996 VL 105 IS 7 BP 2575 EP 2582 DI 10.1063/1.472123 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VB452 UT WOS:A1996VB45200005 ER PT J AU Frink, LJD vanSwol, F AF Frink, LJD vanSwol, F TI Oscillatory surface forces: A test of the superposition approximation SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; ELECTRICAL DOUBLE-LAYER; DNA DOUBLE HELICES; HARD-SPHERE FLUID; SOLVATION FORCES; POLAR LIQUID; MODEL; ADSORPTION AB We report on the density functional theory calculations of electrolyte solutions confined between charged plates. Experiments with the surface forces apparatus have shown that for charged cylinders in simple solvents the surface force is oscillatory at short range. It has been suggested that the total force be considered a superposition of the electrostatic repulsion, the solvation force of a pure solvent, and the van der Waals attraction. In this paper we use the Rosenfeld-Kierlik-Rosinberg (RKR) functional to study a three-component electrolyte solution and explicitly test the superposition approximation, We find that the superposition on approximation is a good approximation when the surface charge is low and the salt concentration is high. We also find that a three-component electrolyte can display short-range equilibrium separations in the absence of van der Waals interactions. (C) 1996 American Institute of Physics. RP Frink, LJD (reprint author), SANDIA NATL LABS,COMPUTAT MAT DEPT,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 25 TC 12 Z9 12 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 1996 VL 105 IS 7 BP 2884 EP 2890 DI 10.1063/1.472150 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VB452 UT WOS:A1996VB45200038 ER PT J AU Drewien, CA Tallant, DR Eatough, MO AF Drewien, CA Tallant, DR Eatough, MO TI Thermal stability and decomposition kinetics of Li2Al4CO3(OH)(12)center dot 3H(2)O SO JOURNAL OF MATERIALS SCIENCE LA English DT Article AB The thermal stability of lithium containing hydrotalcite, a material that has potential application for providing atmospheric corrosion protection to aluminium alloys, was investigated. Lithium aluminium carbonate hydroxide hydrate (Li2Al4CO3(OH)(12).3H(2)O) coatings were prepared by immersion of an 1100 aluminium alloy into a lithium carbonate-lithium hydroxide solution, and the bulk material was prepared by precipitation in the same solution. Thermal stability of the coatings and the bulk material existed to around 150 degrees C. Above this temperature, interlayer water was expelled, followed by loss of structural water and carbon dioxide. The kinetic parameters for interlayer water loss have been determined, and water loss can be described by a Johnson-Mehl-Avrami rate equation. RP Drewien, CA (reprint author), SANDIA NATL LABS,MAT & PROC SCI CTR,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 8 TC 7 Z9 7 U1 1 U2 4 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG 15 PY 1996 VL 31 IS 16 BP 4321 EP 4325 DI 10.1007/BF00356456 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA VF661 UT WOS:A1996VF66100022 ER PT J AU Wright, RN Usmar, SG AF Wright, RN Usmar, SG TI The influence of helium on grain growth in high purity aluminium SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article ID RADIATION-DAMAGE MICROSTRUCTURE C1 UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. RP Wright, RN (reprint author), LOCKHEED IDAHO TECHNOL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD AUG 15 PY 1996 VL 15 IS 16 BP 1400 EP 1402 DI 10.1007/BF00275288 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA VF659 UT WOS:A1996VF65900008 ER PT J AU Corones, JP Ochs, RL AF Corones, JP Ochs, RL TI Wave propagation through a one-dimensional dielectric slab and Omega-symmetric transformations SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article AB This paper contains an abstract theory of wave propagation through an inhomogeneous dielectric slab based on the splitting of waves into right and left propagating components. The mapping of right and left moving waves at one point in the slab to the waves at another point in the slab is found to have a symmetry called In-symmetry which is a generalization of that possessed by symplectic transformations. An analogue of Hamiltonian mechanics is then presented based on these generalized symplectic transformations. (C) 1996 Academic Press, Inc. C1 UNIV TOLEDO,DEPT MATH,TOLEDO,OH 43606. RP Corones, JP (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-247X J9 J MATH ANAL APPL JI J. Math. Anal. Appl. PD AUG 15 PY 1996 VL 202 IS 1 BP 217 EP 235 DI 10.1006/jmaa.1996.0314 PG 19 WC Mathematics, Applied; Mathematics SC Mathematics GA VC684 UT WOS:A1996VC68400015 ER PT J AU Thorn, RP Stief, LJ Kuo, SC Klemm, RB AF Thorn, RP Stief, LJ Kuo, SC Klemm, RB TI Ionization energy of Cl2O and ClO, appearance energy of ClO+ (Cl2O), and heat of formation of Cl2O SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PHOTOIONIZATION SPECTRUM; EQUILIBRIUM-CONSTANT; HALOGENS; OZONE AB The photoionization efficiency (PIE) spectrum of Cl2O was measured over the wavelength range lambda = 98-117 nm by using a discharge flow-photoionization mass spectrometer apparatus coupled to a synchrotron radiation source. A value of 10.90(9) +/- 0.01(6) eV was obtained for the adiabatic ionization energy (IE) of Cl2O from analysis of the photoionization thresholds. The ClO radical was produced via the reaction F + Cl2O --> FCl + ClO and the PIE spectrum of ClO was measured over the wavelength range lambda = 105-117 nm. Analysis of the photoionization threshold yields a value of IE of ClO(X(2) Pi(3/2)) = 10.88(5) +/- 0.01(6) eV. The appearance energy (AE) of ClO+ (from the dissociative ionization of Cl2O) was determined from the PIE spectrum of ClO+ over the wavelength range lambda = 98-104 nm. Combining the AE(298) value, 12.29(6) +/- 0.03(2) eV, with known thermodynamic quantities yields a value for Delta(f)H(298)(degrees)(Cl2O) = 77.2 +/- 3.4 kJ mol(-1). From the value for Delta(f)H(298)(degrees)(Cl2O) and the equilibrium constant for the reaction Cl2O + H2O <----> 2HOCl, a value for Delta(f)H(298)(degrees)(HOCl) = -76.8 +/- 3.5 kJ mol(-1) is obtained. These results for IE(Cl2O), IE(ClO), AE(298)(ClO+, Cl2O), Delta(f)H(298)(degrees)(Cl2O), and Delta(f)H(298)(degrees)(HOCl) are compared with previous estimates or measurements. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP Thorn, RP (reprint author), NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,CODE 690,GREENBELT,MD 20771, USA. NR 52 TC 35 Z9 36 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 15 PY 1996 VL 100 IS 33 BP 14178 EP 14183 DI 10.1021/jp961262j PG 6 WC Chemistry, Physical SC Chemistry GA VC550 UT WOS:A1996VC55000042 ER PT J AU Jentzen, W Unger, E Karvounis, G Shelnutt, JA Dreybrodt, W SchweitzerStenner, R AF Jentzen, W Unger, E Karvounis, G Shelnutt, JA Dreybrodt, W SchweitzerStenner, R TI Conformational properties of nickel(II) octaethylporphyrin in solution .1. Resonance excitation profiles and temperature dependence of structure-sensitive Raman lines SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ASYMMETRIC PERTURBATIONS; MOLECULAR-STRUCTURE; ISOTOPE SHIFTS; CYTOCHROMES-C; SPECTROSCOPY; PORPHYRINS; SPECTRA; METALLOPORPHYRINS; HEME; FUNDAMENTALS AB We have measured polarized resonance Raman spectra of nickel(II) octaethylporphyrin in CS2 and CH2Cl2 solution at different excitation wavelengths (430-580 nm) and temperatures (190-310 K). The analysis of the spectra revealed that the structure-sensitive Raman lints v(19) and v(10) can be decomposed consistently into two sublines for all excitation wavelengths and temperatures. In the resonance region of the Q(0) and Q(V) bands, the 0-1 and 0-0 resonances in the excitation profiles of the low-frequency (LF) sublines of v(19) and v(10) are red-shifted by (150 (30) cm(-1) with respect to the sublines that are at higher frequencies (HF). In accordance with experimental and theoretical results, this indicates that the LF sublines of v(19) and v(10) result from a nonplanar conformer, whereas the HF sublines correspond to an almost planar conformer. The existence of this known conformational equilibrium in solution is further corroborated by the van't Hoff behavior of the intensity ratios I-LF/I-HF of the sublines of v(19) and v(10). From the straight lines in the van't Hoff plot, we calculate that the nonplanar conformer in solution is energetically favored by about 3.0 kJ/mol. C1 UNIV BREMEN,FBI,INST EXPT PHYS,D-28334 BREMEN,GERMANY. SANDIA NATL LABS,FUEL SCI DEPT,ALBUQUERQUE,NM 87185. UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. RI Shelnutt, John/A-9987-2009 OI Shelnutt, John/0000-0001-7368-582X NR 37 TC 97 Z9 97 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 15 PY 1996 VL 100 IS 33 BP 14184 EP 14191 DI 10.1021/jp9533032 PG 8 WC Chemistry, Physical SC Chemistry GA VC550 UT WOS:A1996VC55000043 ER PT J AU Fajer, J Barkigia, KM Melamed, D Sweet, RM Kurreck, H vonGersdorff, J Plato, M Rohland, HC Elger, G Mobius, K AF Fajer, J Barkigia, KM Melamed, D Sweet, RM Kurreck, H vonGersdorff, J Plato, M Rohland, HC Elger, G Mobius, K TI Molecular structures of porphyrin-quinone models for electron transfer SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PHOTOSYNTHETIC REACTION-CENTER; COVALENTLY-LINKED PORPHYRIN; RHODOPSEUDOMONAS-VIRIDIS; PARAMAGNETIC-RESONANCE; CHARGE; CYCLOPHANES; SPECTROSCOPY; RESOLUTION; ENERGY; UNITS AB Synthetic porphyrin-quinone complexes are commonly used to mimic electron transport in photosynthetic reaction centers and to probe the effects of energetics, distances, and relative orientations on rates of electron transfer between donor-acceptor couples. The structures of two such models have been determined by X-ray diffraction. The redox pairs consist of a zinc porphyrin covalently linked to benzoquinone in cis and trans configurations via a cyclohexanediyl bridge. The crystallographic studies were undertaken to provide a structural foundation for the extensive body of experimental and theoretical results that exists for these compounds in both the ground and photoinduced charge-separated states. The results validate conclusions reached from theoretical calculations, EPR and two-dimensional NMR results for these states. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FREE UNIV BERLIN,INST ORGAN CHEM,D-14195 BERLIN,GERMANY. FREE UNIV BERLIN,INST MOL PHYS,D-14195 BERLIN,GERMANY. RP Fajer, J (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 26 TC 18 Z9 19 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 15 PY 1996 VL 100 IS 33 BP 14236 EP 14239 DI 10.1021/jp961422r PG 4 WC Chemistry, Physical SC Chemistry GA VC550 UT WOS:A1996VC55000049 ER PT J AU Hecht, M Fawcett, WR AF Hecht, M Fawcett, WR TI Electrochemistry of [V(III)EDTA](-) in ethylene glycol-water mixtures .1. Thermodynamic and transport properties: Solvation of the reactant and product SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID POTENTIAL SWEEP VOLTAMMETRY; ELECTRON-TRANSFER REACTIONS; CHARGE-TRANSFER KINETICS; NON-AQUEOUS SOLVENTS; MERCURY-ELECTRODE; MIXED-SOLVENTS; REDOX COUPLES; COMPLEXES; ELECTROREDUCTION; BEHAVIOR AB The effect of the solvent composition for water-ethylene glycol (EG) mixtures in the mole fraction range X(EG) = 0-1 on the diffusion coefficients and formal potentials of the ethylenediamine-N,N,N',N'-tetraacetatovanadate(III/II) redox reaction has been investigated at a mercury electrode using convolution potential sweep voltammetry. It has been shown that the formal potential of the redox reaction, measured on the ferrocene/ferricinium scale, depends on the solvent composition. This dependence has been characterized by a two-step solvent exchange mechanism, which describes the solvation of the reactant and product. Distribution diagrams for the differently solvated species have been calculated as a function of the mole fraction of EG. Preferential solvation of the more negatively charged vanadium(II) complex relative to the vanadium(III) complex by water has been found. Acceptor numbers for the mixtures have been proposed. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM,DAVIS,CA 95616. NR 60 TC 12 Z9 12 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 15 PY 1996 VL 100 IS 33 BP 14240 EP 14247 DI 10.1021/jp960361u PG 8 WC Chemistry, Physical SC Chemistry GA VC550 UT WOS:A1996VC55000050 ER PT J AU Alivisatos, AP Johnsson, KP Peng, XG Wilson, TE Loweth, CJ Bruchez, MP Schultz, PG AF Alivisatos, AP Johnsson, KP Peng, XG Wilson, TE Loweth, CJ Bruchez, MP Schultz, PG TI Organization of 'nanocrystal molecules' using DNA SO NATURE LA English DT Article ID QUANTUM DOTS; PARTICLES; CLUSTERS; CDS; COLLOIDS; STATE; TIO2 AB PATTERNING matter on the nanometre scale is an important objective of current materials chemistry and physics. It is driven by both the need to further miniaturize electronic components and the fact that at the nanometre scale, materials properties are strongly size-dependent and thus can be tuned sensitively(1). In nanoscale crystals, quantum size effects and the large number of surface atoms influence the, chemical, electronic, magnetic and optical behaviour(2-4). 'Top-down' (for example, lithographic) methods for nanoscale manipulation reach only to the upper end of the nanometre regime(5); but whereas 'bottom-up' wet chemical techniques allow for the preparation of monodisperse, defect-free crystallites just 1-10 nm in size(6-10), ways to control the structure of nanocrystal assemblies are scarce. Here we describe a strategy for the synthesis of 'nanocrystal molecules', in which discrete numbers of gold nanocrystals are organized into spatially defined structures based on Watson-Crick base-pairing interactions. We attach single-stranded DNA oligonucleotides of defined length and sequence to individual nanocrystals, and these assemble into dimers and trimers on addition of a complementary single-stranded DNA template, We anticipate that this approach should allow the construction of more complex two- and three-dimensional assemblies. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,INST MOL DESIGN,BERKELEY,CA 94701. RP Alivisatos, AP (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,HOWARD HUGHES MED INST,BERKELEY,CA 94720, USA. RI Bruchez, Marcel/C-2271-2009; johnsson, kai/P-4222-2014; Alivisatos , Paul /N-8863-2015; peng, xiaogang/R-6184-2016 OI Bruchez, Marcel/0000-0002-7370-4848; johnsson, kai/0000-0002-8002-1981; Alivisatos , Paul /0000-0001-6895-9048; peng, xiaogang/0000-0002-5606-8472 NR 30 TC 2069 Z9 2109 U1 60 U2 658 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD AUG 15 PY 1996 VL 382 IS 6592 BP 609 EP 611 DI 10.1038/382609a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC303 UT WOS:A1996VC30300047 PM 8757130 ER PT J AU Beelman, CA Stevens, A Caponigro, G LaGrandeur, TE Hatfield, L Fortner, DM Parker, R AF Beelman, CA Stevens, A Caponigro, G LaGrandeur, TE Hatfield, L Fortner, DM Parker, R TI An essential component of the decapping enzyme required for normal rates of mRNA turnover SO NATURE LA English DT Article ID TRANSLATIONAL TERMINATION CODON; MESSENGER-RNA DECAY; SACCHAROMYCES-CEREVISIAE; YEAST; DEADENYLATION; DEGRADATION; TRANSCRIPT; PROTEIN; GENE; IDENTIFICATION AB A MAJOR pathway of messenger RNA degradation in eukaryotic cells is initiated by shortening of the poly(A) tail, which, at least in yeast, triggers a decapping reaction, thereby exposing the mRNA to 5' --> 3' degradation(1-4). Decapping is the key step in this decay pathway because the transcript body is rapidly degraded following decapping. Accordingly, decapping is the site of numerous controls, including inhibition of decapping by the poly(A) tail(3,4) and modulation of mRNA decapping rate by specific sequences(3-5). Moreover, a specialized decay pathway that degrades aberrant transcripts triggers rapid mRNA decapping independently of poly(A)-tail shortening(6). We have identified a yeast gene, termed DCP1, that encodes the decapping enzyme, or an essential component of a decapping complex. The protein Dcp1 is required for the normal decay of many unstable and stable yeast mRNAs, as well as mRNAs that are decapped independently of deadenylation. These results indicate that mRNA-specific rates of decapping, and thus decay, will result from differences in the interaction of the DCP1 decapping enzyme with individual transcripts. C1 UNIV ARIZONA,HOWARD HUGHES MED INST,TUCSON,AZ 85721. UNIV ARIZONA,DEPT MOL & CELLULAR BIOL,TUCSON,AZ 85721. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. NR 21 TC 248 Z9 253 U1 0 U2 10 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD AUG 15 PY 1996 VL 382 IS 6592 BP 642 EP 646 DI 10.1038/382642a0 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VC303 UT WOS:A1996VC30300057 PM 8757137 ER PT J AU Timofeev, EN Kochetkova, SV Mirzabekov, AD Florentiev, VL AF Timofeev, EN Kochetkova, SV Mirzabekov, AD Florentiev, VL TI Regioselective immobilization of short oligonucleotides to acrylic copolymer gels SO NUCLEIC ACIDS RESEARCH LA English DT Article ID HYBRIDIZATION; SUPPORTS; PROTEIN; ENZYME; DESIGN; DNA AB Four types of polyacrylamide or polydimethylacrylamide gels for regioselective (by immobilization at the 3' end) of short oligonucleotides have been designed for use in manufacturing oligonucleotide microchips. Two of these supports contain amino or aldehyde groups in the gel, allowing coupling with oligonucleotides bearing aldehyde or amino groups, respectively, in the presence of a reducing agent. The aldehyde gel support showed a higher immobilization efficiency relative to the amino gel. Of all reducing agents tested, the best results were obtained with a pyridine-borane complex, The other supports are based on an acrylamide gel activated with glutaraldehyde or a hydroxyalkyl-functionalized gel treated with mesyl chloride, The use of dimethylacrylamide instead of acrylamide allows subsequent gel modifications in organic solvents. All the immobilization methods are easy and simple to perform, give high and reproducible yields, allow long durations of storage of the activated support, and provide high stability of attachment and low non-specific binding, Although these gel supports have been developed for preparing oligonucleotide microchips, they may be used for other purposes as well. C1 RUSSIAN ACAD SCI,VA ENGELHARDT MOL BIOL INST,JOINT HUMAN GENOME PROGRAM,MOSCOW 117984,RUSSIA. ARGONNE NATL LAB,ARGONNE,IL 60439. NR 20 TC 91 Z9 93 U1 0 U2 10 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD AUG 15 PY 1996 VL 24 IS 16 BP 3142 EP 3148 DI 10.1093/nar/24.16.3142 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VE820 UT WOS:A1996VE82000004 PM 8774893 ER PT J AU Fittinghoff, DN Bowie, JL Sweetser, JN Jennings, RT Krumbugel, MA DeLong, KW Trebino, R Walmsley, IA AF Fittinghoff, DN Bowie, JL Sweetser, JN Jennings, RT Krumbugel, MA DeLong, KW Trebino, R Walmsley, IA TI Measurement of the intensity and phase of ultraweak, ultrashort laser pulses (vol 21, pg 884, 1996) SO OPTICS LETTERS LA English DT Correction, Addition C1 UNIV ROCHESTER,INST OPT,ROCHESTER,NY 14627. RP Fittinghoff, DN (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 3 TC 16 Z9 16 U1 2 U2 5 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 1996 VL 21 IS 16 BP 1313 EP 1313 DI 10.1364/OL.21.001313 PG 1 WC Optics SC Optics GA VA997 UT WOS:A1996VA99700037 PM 19876336 ER PT J AU Qian, YL Bedzyk, MJ Lyman, PF Lee, TL Tang, SP Freeman, AJ AF Qian, YL Bedzyk, MJ Lyman, PF Lee, TL Tang, SP Freeman, AJ TI Structure and surface kinetics of bismuth adsorption on Si(001) SO PHYSICAL REVIEW B LA English DT Article ID SCANNING TUNNELING MICROSCOPY; EPITAXIAL-GROWTH; SI(100); BI; PASSIVATION; ADSORBATE; VIEW AB X-ray standing wave measurements, along with local-density molecular cluster calculations, were used to determine the surface structure of the low-coverage Bi/Si(001) surface, The 2x2 Bi phase, predicted by theory to be the stable low-coverage structure, was found experimentally to be a metastable phase and was observed to have a thermally activated irreversible phase transition to the stable 1x2 phase. These measurements represent another approach for investigating the kinetics of surface reactions. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208. NORTHWESTERN UNIV,MAT RES CTR,EVANSTON,IL 60208. NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208. RI Bedzyk, Michael/B-7503-2009; Bedzyk, Michael/K-6903-2013 NR 27 TC 7 Z9 7 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 4424 EP 4427 DI 10.1103/PhysRevB.54.4424 PG 4 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800014 ER PT J AU Murdoch, KM Cockroft, NJ AF Murdoch, KM Cockroft, NJ TI Energy-transfer processes between Tm3+ and Pr3+ ions in CsCdBr3 SO PHYSICAL REVIEW B LA English DT Article ID UP-CONVERSION; FLUORESCENCE SPECTROSCOPY; PAIRS; CRYSTALS; UPCONVERSION; DYNAMICS AB The property of preferential pair formation for trivalant ions in CsCdBr3 has been utilized to isolate and investigate energy cross-relaxation and upconversion processes of thulium and praseodymium. The principal pair centers formed by Tm3+ and Pr3+ ions in CsCdBr3 have been identified, including the heterogeneous Tm3+-Pr3+ pair center. Their energy levels and fluorescence lifetimes have been measured at 10 K. Many efficient upconversion processes were observed, involving both intrapair and interpair energy transfer. Red (F-3(3)-->(H6Tm3+)-H-3, D-1(2)-->(H4Pr3+)-H-3), blue ((1)G(4)-->(H6Tm3+)-H-3, P-3(0)-->(H4Pr3+)-H-3), and ultraviolet (D-3(2)-->(H6Tm3+)-H-3) up-conversion fluorescence is produced when pumping the infrared H-3(6)-->(H4Tm3+)-H-3 transitions in the mixed-dopant crystal. Dual-pulse laser techniques were used to identify directly the intermediate states involved in the energy-transfer upconversion and mechanisms are proposed to explain the processes observed. Excitation energy is localized in the pair centers, which prefer to relax via sequential energy transfers between the two ions, when these involve smaller energy mismatches than multiphonon decay. C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. RP Murdoch, KM (reprint author), UNIV CANTERBURY,DEPT PHYS & ASTRON,CHRISTCHURCH 1,NEW ZEALAND. NR 25 TC 20 Z9 22 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 4589 EP 4603 DI 10.1103/PhysRevB.54.4589 PG 15 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800044 ER PT J AU Mercer, JL AF Mercer, JL TI Tight-binding models for compounds: Application to SiC SO PHYSICAL REVIEW B LA English DT Article ID METAL-SEMICONDUCTOR JUNCTIONS; LATTICE-DYNAMICAL PROPERTIES; SCHOTTKY-BARRIER FORMATION; PLANE-WAVE CALCULATIONS; ELECTRONIC-STRUCTURE; MOLECULAR-DYNAMICS; SILICON-CARBIDE; DEFORMATION POTENTIALS; CRYSTAL STABILITY; GROUND-STATE AB A simple method for combining single element, tight-binding models into models for compounds is investigated. Using parameters fitted to silicon, carbon, indium, and phosphorous band structures, test cases for SiC and InP band structures show excellent results, especially when on-site energy shifts are included through the use of intra-atomic matrix elements. Two long-ranged silicon and carbon models are developed and combined to test total energy results for silicon carbide. Total energies and band structures for the compound system are in very good agreement with first-principles results, indicating that models for compound systems may be readily produced from properly developed single element models. RP Mercer, JL (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 83 TC 14 Z9 14 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 4650 EP 4659 DI 10.1103/PhysRevB.54.4650 PG 10 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800051 ER PT J AU Szpala, S AsokaKumar, P Nielsen, B Peng, JP Hayakawa, S Lynn, KG Gossmann, HJ AF Szpala, S AsokaKumar, P Nielsen, B Peng, JP Hayakawa, S Lynn, KG Gossmann, HJ TI Defect identification using the core-electron contribution in Doppler-broadening spectroscopy of positron-annihilation radiation SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-BEAM-EPITAXY; IMPLANTED SI; THIN-FILMS; SILICON; SURFACES; SEMICONDUCTORS; DECONVOLUTION; DIFFUSION; ION AB Reduction of background using a coincidence-detection system in Doppler-broadening spectroscopy of positron-annihilation radiation allows us to examine the contribution of high-momentum core electrons. The contribution is used as a fingerprint to identify chemical variations at a defect site. The technique is applied to study a variety of open volume defects in Si, including decorated vacancies associated with doping. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. RP Szpala, S (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,POB 5000,UPTON,NY 11973, USA. RI Nielsen, Bent/B-7353-2009 OI Nielsen, Bent/0000-0001-7016-0040 NR 40 TC 88 Z9 93 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 4722 EP 4731 DI 10.1103/PhysRevB.54.4722 PG 10 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800059 ER PT J AU Zhu, J delaRubia, TD Yang, LH Mailhiot, C Gilmer, GH AF Zhu, J delaRubia, TD Yang, LH Mailhiot, C Gilmer, GH TI Ab initio pseudopotential calculations of B diffusion and pairing in Si SO PHYSICAL REVIEW B LA English DT Article ID POINT-DEFECTS; TRANSIENT DIFFUSION; IMPURITY DIFFUSION; BORON-DIFFUSION; SILICON; MECHANISMS; MIGRATION; IMPLANTATION; CONSTANTS; SYSTEMS AB The ab initio pseudopotential method was used to study the boron diffusion and pairing process in crystalline silicon. The results show that substitutional B attracts interstitial Si with a binding energy of 1.1 +/- 0.1 eV. We show that B diffusion is significantly enhanced in the presence of the Si interstitial due to the substantial lowering of the migrational barrier through most likely a kick-out mechanism. The resulting mobile boron can also be trapped by another substitutional boron with a binding energy of 1.8 +/- 0.1 eV, forming an immobile and electrically inactive two-boron pair along a (001) direction. It is also found that the pairing of these two boron atoms involves the trapping of a Si interstitial. Alternatively, two B pairs that do not trap the Si interstitial were found to be energetically unfavorable. All of these findings are consistent with experimental results. C1 AT&T BELL LABS, LUCENT TECHNOL, MURRAY HILL, NJ 07974 USA. RP Zhu, J (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. NR 39 TC 176 Z9 177 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 4741 EP 4747 DI 10.1103/PhysRevB.54.4741 PG 7 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800061 ER PT J AU Dinh, LN Chase, LL Balooch, M Siekhaus, WJ Wooten, F AF Dinh, LN Chase, LL Balooch, M Siekhaus, WJ Wooten, F TI Optical properties of passivated Si nanocrystals and SiOx nanostructures SO PHYSICAL REVIEW B LA English DT Article ID OXIDIZED POROUS SILICON; TIME-RESOLVED PHOTOLUMINESCENCE; LIGHT-EMISSION; ELECTRONIC-STRUCTURE; LUMINESCENCE; SURFACE; BLUE; EXCITATION; DEFECT; SPECTROSCOPY AB Thin films of Si nanoclusters passivated with oxygen or hydrogen, with an average size of a few nanometers, have been synthesized by thermal vaporization of Si in an Ar buffer gas, followed by subsequent exposure to oxygen or atomic hydrogen. High-resolution transmission electron microscopy and x-ray diffraction revealed that these nanoclusters were crystalline. However, during synthesis, if oxygen was the buffer gas, a network of amorphous Si oxide nanostructures (an-SiOx) with occasional embedded Si dots was formed. Ail samples showed strong infrared and/or visible photoluminescence (PL) with varying decay times from nanoseconds to microseconds depending on synthesis conditions. Absorption in the Si cores for surface passivated Si nanocrystals (nc-Si), but mainly in oxygen related defect centers for an-SiOx, was observed by photoluminescence excitation spectroscopy. The visible components of PL spectra were noted to blueshift and broaden as the size of the nc-Si was reduced. There were differences in PL spectra for hydrogen and oxygen passivated nc-Si. Many common PL properties between oxygen passivated nc-Si and an-SiOx were observed. Our data can be explained by a model involving absorption between quantum confined states in the Si cores and emission for which the decay times are very sensitive to surface and/or interface states. The emission could involve a simple band-to-band recombination mechanism within the Si cores. The combined evidence of all of our experimental results suggests, however, that emission between surface or interface states is a more likely mechanism. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP Dinh, LN (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,LIVERMORE,CA 94550, USA. NR 47 TC 134 Z9 138 U1 3 U2 19 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 5029 EP 5037 DI 10.1103/PhysRevB.54.5029 PG 9 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800094 ER PT J AU Stumpf, R Feibelman, PJ AF Stumpf, R Feibelman, PJ TI Towards an understanding of liquid-metal embrittlement: Energetics of Ga on Al surfaces SO PHYSICAL REVIEW B LA English DT Article ID GALLIUM; PSEUDOPOTENTIALS; CRYSTAL AB First-principles electronic structure calculations show that Ga wets the low Miller index surfaces of Al. Consistent with a thermodynamic basis for the observation that Ga causes single-crystal Al to crack along (100) planes, the Ga-covered (100) plane has the lowest surface energy. This represents a compromise between weaker Ga binding on closer-packed Al surfaces and higher clean surface surface energies on more open ones. In the second adsorbed Ga layer, on Al(100), several structures lie near the minimum total energy, consistent with rapid diffusion of Ga to a crack tip. RP Stumpf, R (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 26 TC 30 Z9 30 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 7 BP 5145 EP 5150 DI 10.1103/PhysRevB.54.5145 PG 6 WC Physics, Condensed Matter SC Physics GA VE488 UT WOS:A1996VE48800106 ER PT J AU Corkill, JL Ho, KM AF Corkill, JL Ho, KM TI Electronic occupation functions for density-matrix tight-binding methods SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS; CARBON; GAAS AB We propose a method for including the fractional occupancy of electronic energy levels within a tight-binding density-matrix formalism. This method is based on successful techniques used in first-principles methods. Molecular-dynamics test simulations show that the density-matrix technique accurately reproduces the physics of a direct-diagonalization simulation using Fermi-Dirac occupancy. C1 IOWA STATE UNIV,DEPT PHYS,AMES,IA 50011. RP Corkill, JL (reprint author), IOWA STATE UNIV,AMES LAB,AMES,IA 50011, USA. NR 12 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP 5340 EP 5345 DI 10.1103/PhysRevB.54.5340 PG 6 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900032 ER PT J AU Hamalainen, K Manninen, S Kao, CC Caliebe, W Hastings, JB Bansil, A Kaprzyk, S Platzman, PM AF Hamalainen, K Manninen, S Kao, CC Caliebe, W Hastings, JB Bansil, A Kaprzyk, S Platzman, PM TI High resolution Compton scattering study of Be SO PHYSICAL REVIEW B LA English DT Article ID X-RAY SPECTROMETER; SYNCHROTRON RADIATION; BERYLLIUM; DENSITY; PROFILE; PERFORMANCE; ALLOYS; STATES AB We have carried out high-resolution Compton scattering measurements from two single crystals of Be ([00.1] and [11.0]), together with highly accurate all-electron first-principles computations of the profiles within the band theory framework. The Compton data were collected using a newly constructed crystal spectrometer at a record momentum resolution varying between 0.023 and 0.032 a.u. (full width at half maximum) with 8 keV x rays from a synchrotron source. Although the overall shapes of the measured and computed spectra are in good accord, the fine structure in the data shows significant discrepancies with respect to the local density approximation based theoretical predictions. In particular, several features in the observed spectra are substantially broader than the computations, indicating the importance of electron correlations and other effects in analyzing momentum densities and Compton profiles from solids. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,UPTON,NY 11973. NORTHEASTERN UNIV,DEPT PHYS,BOSTON,MA 02115. AT&T BELL LABS,MURRAY HILL,NJ 07974. ACAD MIN & MET,KRAKOW,POLAND. RP Hamalainen, K (reprint author), UNIV HELSINKI,DEPT PHYS,POB 9,FIN-00014 HELSINKI,FINLAND. RI Hamalainen, Keijo/A-3986-2010 OI Hamalainen, Keijo/0000-0002-9234-9810 NR 31 TC 60 Z9 60 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP 5453 EP 5459 DI 10.1103/PhysRevB.54.5453 PG 7 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900044 ER PT J AU Heller, CM Campbell, IH Laurich, BK Smith, DL Bradley, DDC Burn, PL Ferraris, JP Mullen, K AF Heller, CM Campbell, IH Laurich, BK Smith, DL Bradley, DDC Burn, PL Ferraris, JP Mullen, K TI Solid-state-concentration effects on the optical absorption and emission of poly(p-phenylene vinylene)-related materials SO PHYSICAL REVIEW B LA English DT Article ID LIGHT-EMITTING-DIODES; FLUORESCENCE QUANTUM YIELDS; ELECTROLUMINESCENT DIODES; CONJUGATED POLYMERS; LUMINESCENCE; PRECURSOR; DEVICE; MODELS; LAYER; ORDER AB We present measurements of the optical absorption and emission properties of poly(p-phenylene vinylene) (PPV)-related materials focusing on the differences between molecules isolated by dispersion in an inert host and concentrated molecular films. Optical absorption spectra, photoluminescence (PL) spectra, PL efficiency, and time-resolved PL spectra of dilute blends of PPV oligomers with 2-5 phenylene-phenyl rings are compared with those of dense oligomer and polymer films. In dilute oligomer-poly(methyl methacrylate) (PMMA) blends with high PL efficiency, the PL decay is exponential, independent of both temperature and oligomer length. This implies that the fundamental radiative lifetime of PPV oligomers is essentially independent of oligomer length. Concentrated spin-cast oligomer films and polymers have a faster and strongly temperature-dependent PL decay that approaches that of the dilute oligomer results at low temperature. The differences in PL decay correspond to changes in PL efficiency. The efficiency of the oligomer-PMMA blend is high and only weakly temperature dependent, whereas that of concentrated films is lower and strongly temperature dependent, decreasing by more than a factor of 3 from 10 to 350 K. The quenching of the PL efficiency in concentrated films is due to migration to extrinsic, impurity related centers as opposed to an intrinsic intermolecular recombination process. The PL spectrum of a dilute oligomer blend redshifts substantially, both as the excitation energy is decreased and as the emission time increases. This spectral redshift is due to disorder-induced site-to-site variation and not to diffusion to lower-energy sites. In contrast, no spectral shift with excitation energy or emission time was observed for dense oligomer films. C1 UNIV SHEFFIELD,DEPT PHYS,SHEFFIELD S3 7RH,S YORKSHIRE,ENGLAND. UNIV SHEFFIELD,CTR MOL MAT,SHEFFIELD S3 7RH,S YORKSHIRE,ENGLAND. UNIV OXFORD,DYSON PERRINS LAB,OXFORD OX1 3QY,ENGLAND. UNIV TEXAS,RICHARDSON,TX 75080. MAX PLANCK INST POLYMER RES,MAINZ,GERMANY. GRAZ TECH UNIV,INST FESTKORPERPHYS,A-8010 GRAZ,AUSTRIA. RP Heller, CM (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Burn, Paul/F-5347-2010; Bradley, Donal/F-6068-2011 OI Bradley, Donal/0000-0001-8713-5060 NR 27 TC 65 Z9 65 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP 5516 EP 5522 DI 10.1103/PhysRevB.54.5516 PG 7 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900052 ER PT J AU deMelo, CARS AF deMelo, CARS TI Quantum switching of polarization in mesoscopic ferroelectrics SO PHYSICAL REVIEW B LA English DT Article ID PBTIO3 ULTRAFINE PARTICLES; PHASE-TRANSITION; MAGNETIZATION; DISSIPATION; SIZE AB A single domain of a uniaxial ferroelectric grain may be thought of as a classical permanent memory. At the mesoscopic level this system may experience considerable quantum fluctuations due to tunneling between two possible memory states, thus destroying the classical permanent memory effect. To study these quantum effects the concrete example of a mesoscopic uniaxial ferroelectric grain is discussed, where the orientation of the electric polarization determines two possible memory states. The possibility of quantum switching of the polarization in mesoscopic uniaxial ferroelectric grains is thus proposed. To determine the degree of memory loss, the tunneling rate between the two polarization states is calculated at zero temperature both in the absence and in the presence of an external static electric field. In addition, a discussion of crossover temperature between thermally activated behavior and quantum tunneling behavior is presented. And finally, environmental effects (phonons, defects, and surfaces) are also considered. RP deMelo, CARS (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 31 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP 5829 EP 5843 PG 15 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900089 ER PT J AU Crespi, VH Chopra, NG Cohen, ML Zettl, A Louie, SG AF Crespi, VH Chopra, NG Cohen, ML Zettl, A Louie, SG TI Anisotropic electron-beam damage and the collapse of carbon nanotubes SO PHYSICAL REVIEW B LA English DT Article ID DIMENSIONAL CHANGES; IRRADIATION; GRAPHITE; MICROTUBULES AB Irradiation of multiwalled carbon nanotubes with the 800-keV electron beam of a transmission electron microscope induces anisotropic collapse of the nanotube. Tight-binding molecular-dynamics simulations of tube response following momentum transfer from large-angle electron-nuclear collisions reveal a strongly anisotropic threshold for atomic displacement. The theoretical displacement threshold for an impulse perpendicular to the local tangent plane of a single-walled tube is roughly half the damage threshold for impulses within the tangent plane. The electron beam preferentially damages the front and back of the nanotube, producing the observed anisotropic collapse perpendicular to the direction of the beam. The attraction of opposite faces of the inner wall then accelerates the collapse. C1 LAWRENCE BERKELEY NATL LAB,DIV SCI MAT,BERKELEY,CA 94720. RP Crespi, VH (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Zettl, Alex/O-4925-2016; OI Zettl, Alex/0000-0001-6330-136X; Crespi, Vincent/0000-0003-3846-3193 NR 15 TC 120 Z9 121 U1 2 U2 14 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP 5927 EP 5931 DI 10.1103/PhysRevB.54.5927 PG 5 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900100 ER PT J AU Driessen, FAJM Cheong, HM Mascarenhas, A Deb, SK Hageman, PR Bauhuis, GJ Giling, LJ AF Driessen, FAJM Cheong, HM Mascarenhas, A Deb, SK Hageman, PR Bauhuis, GJ Giling, LJ TI Interface-induced conversion of infrared to visible light at semiconductor interfaces SO PHYSICAL REVIEW B LA English DT Article ID ENERGY UP-CONVERSION AB Efficient, low-temperature conversion of infrared light into visible light (red, orange, green) is reported at single heterojunctions and undoped quantum wells of GaAs and ordered AlxGa1-xInP2; an increase in photon energy of 700 meV is obtained. The signal originates from the high-band-gap layers and disappears only if the excitation energy is tuned below the GaAs band gap. The intensity of the up-converted photoluminescence (PL) is found to decrease significantly slower with increasing temperature than that of the regular PL and it remains observable up to 200 K. Interface-induced cold Auger processes along with the presence of trapped states for both electrons and holes in these ordered alloys account for this nonlinear mechanism. A colinear double-beam experiment confirms this. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. UNIV NIJMEGEN,MAT RES INST,DEPT EXPT SOLID STATE PHYS,NL-6525 ED NIJMEGEN,NETHERLANDS. RI Cheong, Hyeonsik/D-7424-2012; Hageman, Paul/D-4609-2012 OI Cheong, Hyeonsik/0000-0002-2347-4044; NR 14 TC 34 Z9 35 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP R5263 EP R5266 PG 4 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900018 ER PT J AU Kottcke, M Graupner, H Zehner, DM Hammer, L Heinz, K AF Kottcke, M Graupner, H Zehner, DM Hammer, L Heinz, K TI Segregation-induced subsurface restructuring of FeAl(100) SO PHYSICAL REVIEW B LA English DT Article ID SURFACE-STRUCTURE DETERMINATION; ENERGY-ELECTRON-DIFFRACTION; TENSOR LEED; ATOMIC-STRUCTURE AB Upon sputtering and subsequent annealing, the subsurface region of the (100) surface of FeAl undergoes a transition to a practically stable and ordered Fe3Al slab. It is capped by an Al top layer forming a rather complex interface to the bulk FeAl. This shows that routine surface preparation procedures with sputtering involved can lead to substantial restructuring extending deep into the surface. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP Kottcke, M (reprint author), UNIV ERLANGEN NURNBERG,LEHRSTUHL FESTKORPERPHYS,STAUDTSTR 7,D-91058 ERLANGEN,GERMANY. RI Hammer, Lutz/D-9863-2013 NR 22 TC 16 Z9 16 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1996 VL 54 IS 8 BP R5275 EP R5278 PG 4 WC Physics, Condensed Matter SC Physics GA VF929 UT WOS:A1996VF92900021 ER PT J AU Dorey, N Khoze, VV Mattis, MP AF Dorey, N Khoze, VV Mattis, MP TI Multi-instanton calculus in N=2 supersymmetric gauge theory SO PHYSICAL REVIEW D LA English DT Article ID YANG-MILLS THEORY; MODULI SPACE; BREAKING; QCD; MONODROMIES; MONOPOLES; DUALITY; PHASE AB The Seiberg-Witten solution of N = 2 supersymmetric SU(2) gauge theory may be viewed as a prediction for the infinite family of constants {F-n} measuring the n-instanton contribution to the prepotential F. Here we examine the instanton physics directly, in particular the contribution of the general self-dual solution of topological charge n constructed by Atiyah, Drinfeld, Hitchin, and Manin (ADHM). In both the bosonic and supersymmetric cases, we determine both the large- and short-distance behavior of all the fields in this background. This allows us to construct the exact classical interaction between n ADHM (super)instantons mediated by the adjoint Higgs bosons. We calculate the one- and two-instanton contributions to the low-energy Seiberg-Witten effective action and find precise agreement with their predicted values of F-1 and F-2. C1 UNIV DURHAM,CTR PARTICLE THEORY,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. LOS ALAMOS NATL LAB,THEORET DIV T8,LOS ALAMOS,NM 87545. RP Dorey, N (reprint author), UNIV COLL SWANSEA,DEPT PHYS,SWANSEA SA2 8PP,W GLAM,WALES. OI Khoze, Valentin V/0000-0003-3006-4147 NR 54 TC 133 Z9 133 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD AUG 15 PY 1996 VL 54 IS 4 BP 2921 EP 2943 DI 10.1103/PhysRevD.54.2921 PG 23 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VD678 UT WOS:A1996VD67800046 ER PT J AU Contopanagos, HF Einhorn, MB AF Contopanagos, HF Einhorn, MB TI Scattering of very light charged particles - Reply SO PHYSICAL REVIEW D LA English DT Letter ID MASSLESS PARTICLES AB We respond to the preceding Comment by J. C. Taylor. C1 UNIV MICHIGAN,RANDALL LAB PHYS,ANN ARBOR,MI 48109. RP Contopanagos, HF (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD AUG 15 PY 1996 VL 54 IS 4 BP 2978 EP 2979 DI 10.1103/PhysRevD.54.2978 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VD678 UT WOS:A1996VD67800053 ER PT J AU Greub, C Hurth, T Misiak, M Wyler, D AF Greub, C Hurth, T Misiak, M Wyler, D TI The c->u gamma contribution to weak radiative charm decay SO PHYSICS LETTERS B LA English DT Article ID MESONS AB The c --> u gamma transition does not occur at the tree level in the Standard Model and is strongly GIM-suppressed at one loop. The leading QCD logarithms are known to enhance the amplitude by two orders of magnitude. We point out that the amplitude increases further by two orders of magnitude after including the complete 2-loop QCD contributions. Nevertheless,Delta S = 0 radiative decays of charmed hadrons remain dominated by the c --> and c --> quark subprocesses. C1 UNIV ZURICH,INST THEORET PHYS,CH-8057 ZURICH,SWITZERLAND. RP Greub, C (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 11 TC 56 Z9 56 U1 0 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 AUG 15 PY 1996 VL 382 IS 4 BP 415 EP 420 DI 10.1016/0370-2693(96)00694-6 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VC039 UT WOS:A1996VC03900014 ER PT J AU Mecking, H Kocks, UF Hartig, C AF Mecking, H Kocks, UF Hartig, C TI Taylor factors in materials with many deformation modes SO SCRIPTA MATERIALIA LA English DT Article C1 TECH UNIV HAMBURG,D-21071 HAMBURG,GERMANY. RP Mecking, H (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,MAIL STOP K-765,LOS ALAMOS,NM 87545, USA. RI Hartig, Christian/F-4673-2010; Kocks, Fred/E-1159-2011 NR 7 TC 36 Z9 36 U1 3 U2 25 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD AUG 15 PY 1996 VL 35 IS 4 BP 465 EP 471 DI 10.1016/1359-6462(96)00137-6 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA UX921 UT WOS:A1996UX92100001 ER PT J AU Zhang, HH Filipponi, A DiCicco, A Lee, SC Scott, MJ Holm, RH Hedman, B Hodgson, KO AF Zhang, HH Filipponi, A DiCicco, A Lee, SC Scott, MJ Holm, RH Hedman, B Hodgson, KO TI Multiple-edge XAS studies of synthetic iron-copper bridged molecular assemblies relevant to cytochrome c oxidase. Structure determination using multiple-scattering analysis with statistical evaluation of errors SO INORGANIC CHEMISTRY LA English DT Article ID ZINC SUPEROXIDE-DISMUTASE; EXAFS ANALYSIS; PROTON PUMP; ACTIVE-SITE; COMPLEXES; ANALOG; ANGLE; GNXAS; OXO AB An X-ray absorption spectroscopy study has been carried out at the Fe and Cu K-edges for two bridged molecular assemblies, both of which contain an Fe-X-Cu (X = O2-, OH-) bridge unit, some of whose features are relevant to the binuclear site of cytochrome c oxidase. The two complexes [(OEP)Fe-O-Cu(Me(6)tren)](1+) and [(OEP)Fe-(OH)-Cu(Me(5)tren)(OClO3)](1+) have similar structural fragments around the metal centers except that they differ significantly in the bridge structure (the former contains a linear oxo bridge while the latter has a bent hydroxo bridge). We report a comparative study of these complexes using multiple-scattering (MS) EXAFS analysis and the program package GNXAS. It is found that there is a dramatic increase in the amplitude of the Fe-X-Cu MS pathway as the bridge unit approaches linearity. Full EXAFS MS analysis enables accurate quantitation of bridge metrical details and geometry for both complexes. These studies were done with an expanded version of GNXAS, which allows for simultaneous multiple-edge fitting. Such multiple-edge analysis (using both Fe and Cu edge data) allows common pathways (in this case involving the Fe-X-Cu bridge) to be constrained to be the same, thus improving the observation/variable ratio and enhancing sensitivity for determination of the bridge structure. The accuracy of the structural determination for the bridge units is evaluated by a statistical analysis methodology in which correlations among fitting parameters are identified and contour plots are used to determine random error. The overall error in the EXAFS structural determination is found by establishing the variance with the crystallographically determined values: for the EXAFS-determined parameters at distances below 4 Angstrom, distances and angles deviated on average from crystallographic values by 0.014 Angstrom and 1.5 degrees, respectively. It is also established that structural features in the Fe absorption preedge are diagnostic of oxo vs hydroxo ligation. The relevance of this study to the structural definition of binuclear bridged sites in cytochrome c oxidase and other metalloenzymes is considered. C1 HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE. STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. UNIV AQUILA,DIPARTIMENTO FIS,I-67010 COPPITO,LAQUILA,ITALY. UNIV CAMERINO,DIPARTIMENTO MATEMAT & FIS,I-62032 CAMERINO,MC,ITALY. RI Scott, Michael/B-7859-2013; Filipponi, Adriano/P-7796-2015 OI Filipponi, Adriano/0000-0002-3870-5853 NR 48 TC 29 Z9 29 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 14 PY 1996 VL 35 IS 17 BP 4819 EP 4828 DI 10.1021/ic960021n PG 10 WC Chemistry, Inorganic & Nuclear SC Chemistry GA VC197 UT WOS:A1996VC19700004 ER PT J AU Khakoo, MA Trajmar, S LeClair, LR Kanik, I Csanak, G Fontes, CJ AF Khakoo, MA Trajmar, S LeClair, LR Kanik, I Csanak, G Fontes, CJ TI Differential cross sections for electron impact excitation of Xe .1. Excitation of the five lowest levels; Experiment and theory SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID DISTORTED-WAVE CALCULATION; INCIDENT ENERGIES; NOBLE-GASES; RARE-GASES; SCATTERING; XENON; PARAMETERS; KRYPTON; STATES; REGION AB Experimental and theoretical differential cross sections (DCSs) for electron impact excitation of the five lowest levels of xenon are reported. The experimental data were obtained at impact energies of 10, 15, 20 and 30 eV for scattering angles in the range of 0 degrees to 135 degrees. The scattering intensities for excitation of various levels with respect to that of the combined two lowest levels (representing the corresponding DCS ratios) were measured with conventional electrostatic electron energy-loss spectrometers. Absolute DCSs for excitation of the combined two lowest levels were derived from DCS ratios for excitation of the combined two lowest levels and elastic scattering and utilizing the elastic DCSs of Register et al. These DCS ratios were obtained from scattering intensity ratios measured with conventional electrostatic electron energy-loss spectrometers after correction for instrumental effects by utilizing electron time-of-flight measurements for determining the proper value of this ratio at 90 degrees scattering angle for each impact energy. The unitarized first-order many-body theory and the unitarized distorted-wave approximation were applied to obtain the theoretical differential cross sections for impact energies of 10, 15, 20, 30, 50 and 80 eV. The present experimental and theoretical results are compared with each other and with other available experimental and theoretical DCSs. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP Khakoo, MA (reprint author), CALIF STATE UNIV FULLERTON,DEPT PHYS,FULLERTON,CA 92634, USA. NR 48 TC 29 Z9 29 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD AUG 14 PY 1996 VL 29 IS 15 BP 3455 EP 3475 DI 10.1088/0953-4075/29/15/018 PG 21 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA VD866 UT WOS:A1996VD86600018 ER PT J AU Khakoo, MA Trajmar, S Wang, S Kanik, I Aguirre, A Fontes, CJ Clark, REH Abdallah, J AF Khakoo, MA Trajmar, S Wang, S Kanik, I Aguirre, A Fontes, CJ Clark, REH Abdallah, J TI Differential cross sections for electron impact excitation of Xe .2. Excitation of the sixth to twentieth lowest levels; Experiment and theory SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID XENON AB Experimental and theoretical differential cross sections fbr electron impact excitation of Xe are reported for the lowest 6th to 20th levels. These data are an extension of the work discussed in the preceding paper. The theoretical work is based on the unitarized first-order many-body theory and unitarized distorted-wave approximation. The experimental data span the same respective range of electron impact energies and scattering angles as the preceding paper. The present theoretical and experimental data are compared with each other and with other existing experimental data. C1 CALTECH,JET PROP LAB,PASADENA,CA 91109. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP Khakoo, MA (reprint author), CALIF STATE UNIV FULLERTON,DEPT PHYS,FULLERTON,CA 92634, USA. NR 5 TC 16 Z9 16 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD AUG 14 PY 1996 VL 29 IS 15 BP 3477 EP 3486 DI 10.1088/0953-4075/29/15/019 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA VD866 UT WOS:A1996VD86600019 ER PT J AU Osinski, M Zeller, J Chiu, PC Phillips, BS Barton, DL AF Osinski, M Zeller, J Chiu, PC Phillips, BS Barton, DL TI AlGaN/InGaN/GaN blue light emitting diode degradation under pulsed current stress SO APPLIED PHYSICS LETTERS LA English DT Article ID N-TYPE GAN AB This study focused on the performance of commercial AlGaN/InGaN/GaN blue light emitting diodes (LEDs) under high current pulse conditions. The results of deep level transient spectroscopy (DLTS), thermally stimulated capacitance, and admittance spectroscopy measurements performed on stressed devices, showed no evidence of any deep-level defects that may have developed as a result of high current pulses. Physical analysis of stressed LEDs indicated a strong connection between the high intrinsic defect density in these devices and the resulting mode of degradation. (C) 1996 American Institute of Physics. C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP UNIV NEW MEXICO, CTR HIGH TECHNOL MAT, ALBUQUERQUE, NM 87131 USA. NR 18 TC 48 Z9 50 U1 0 U2 12 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 AUG 12 PY 1996 VL 69 IS 7 BP 898 EP 900 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400011 ER PT J AU Mitha, S Aziz, MJ Schiferl, D Poker, DB AF Mitha, S Aziz, MJ Schiferl, D Poker, DB TI Activation volume for arsenic diffusion in germanium SO APPLIED PHYSICS LETTERS LA English DT Article ID SELF-DIFFUSION; PRESSURE; SILICON; TEMPERATURE; MECHANISMS; LATTICE; VACANCY AB We have measured the effect of pressure on As diffusion in Ge. Diffusion anneals on ion-implanted samples were carried out in a high-temperature diamond anvil cell using fluid argon as a clean, hydrostatic pressure medium. At 575 degrees C over the pressure range 0.1-4 GPa, pressure slightly enhances the diffusivity, characterized by an activation volume of -1.7+/-1.4 cm(3)/mole or -0.12+/-0.10 times the atomic volume. The results call into question the prevailing view that diffusion of groups III, IV, and V elements are mediated entirely by vacancies. If diffusion of As is mediated entirely by vacancies then either the vacancy formation volume must be unexpectedly low or the energy of vacancy migration must be unexpectedly high. (C) 1996 American Institute of Physics. C1 HARVARD UNIV, DIV APPL SCI, CAMBRIDGE, MA 02138 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. NR 26 TC 20 Z9 20 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 AUG 12 PY 1996 VL 69 IS 7 BP 922 EP 924 DI 10.1063/1.116944 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400019 ER PT J AU Hjalmarson, HP Kurtz, SR AF Hjalmarson, HP Kurtz, SR TI Electron Auger processes in mid-infrared InAsSb/InGaAs heterostructures SO APPLIED PHYSICS LETTERS LA English DT Article ID QUANTUM-WELL LASERS; 4 MU-M; CARRIER LIFETIMES; BAND-STRUCTURE; THRESHOLD; SUPERLATTICES; CRYSTALS; HGCDTE; ENERGY AB To investigate the effects of strain and quantum confinement, Auger rates are calculated for an n-type strained InAs0.9Sb0.1/In0.87Ga0.13As mid-infrared laser structure as a function of temperature. Compressive strain in the quantum wells reduces the mass of the holes which leads to a reduction in the Auger rate compared with an unstrained quantum well. The rate reduction is explained in terms of a qualitative analysis of the role of strain. The rate includes contributions from inter-subband Auger transitions which are found to dominate the rate at low temperature. RP Hjalmarson, HP (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 15 TC 24 Z9 25 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 12 PY 1996 VL 69 IS 7 BP 949 EP 951 DI 10.1063/1.117091 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400028 ER PT J AU Sinclair, MB Gourley, PL Crawford, MH Meissner, KE Schneider, RP AF Sinclair, MB Gourley, PL Crawford, MH Meissner, KE Schneider, RP TI Transient photoinduced absorption in (AlxGa1-x)(0.5)In0.5P fractal quantum well heterostructures SO APPLIED PHYSICS LETTERS LA English DT Article ID SUPERLUMINESCENT DIODE; SPECTRUM; 1.5-MU-M; SINGLE AB Picosecond photoinduced absorption measurements have been performed on four different (AlxGa1-x)(0.5)In0.5P fractal quantum well heterostructures. The results of these measurements reveal that, at early times following pulsed excitation, the carriers remain near the surface layer in which they were photogenerated, and populate the higher lying branches of the V-shaped fractal structure. With increasing time, the carrier population relaxes toward the lowest energy, central wall. The rate at which the relaxation occurs is governed by the characteristic layer of widths of the fractal structure. RP Sinclair, MB (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 11 TC 1 Z9 1 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 12 PY 1996 VL 69 IS 7 BP 966 EP 968 DI 10.1063/1.117097 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400034 ER PT J AU Lyman, PF Bedzyk, MJ AF Lyman, PF Bedzyk, MJ TI Surfactant-mediated epitaxy of metastable SnGe alloys SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM-EPITAXY; SN/GE SUPERLATTICES; BAND-STRUCTURE; GE1-XSNX ALLOYS; ALPHA-SN; GROWTH; GE; STABILITY AB An effective method for molecular beam epitaxial construction of metastable, pseudomorphic SnGe/Ge(001) heterostructures is presented. This method exploits a surfactant species, Bi, to alter Sn surface-segregation kinetics. Using the x-ray standing wave technique, we demonstrate not only that Bi segregates to the growth surface more strongly than, Sn, but that it also dramatically suppresses the segregation mobility of Sn. The limited Sn diffusivity, which is believed to stem from the full coordination of subsurface Sn atoms, allows the epitaxy of well-ordered, metastable SnGe heterostructures. (C) 1996 American Institute of Physics. C1 NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Lyman, PF (reprint author), NORTHWESTERN UNIV,MAT RES CTR,EVANSTON,IL 60208, USA. RI Bedzyk, Michael/B-7503-2009; Bedzyk, Michael/K-6903-2013 NR 22 TC 8 Z9 9 U1 5 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 12 PY 1996 VL 69 IS 7 BP 978 EP 980 DI 10.1063/1.117101 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400038 ER PT J AU Ruvimov, S LilientalWeber, Z Suski, T Ager, JW Washburn, J Krueger, J Kisielowski, C Weber, ER Amano, H Akasaki, I AF Ruvimov, S LilientalWeber, Z Suski, T Ager, JW Washburn, J Krueger, J Kisielowski, C Weber, ER Amano, H Akasaki, I TI Effect of Si doping on the dislocation structure of GaN grown on the A-face of sapphire SO APPLIED PHYSICS LETTERS LA English DT Article ID FILMS; NITRIDE; STRAIN AB Transmission electron microscopy, x-ray diffraction, low-temperature photoluminescence, and Raman spectroscopy were applied to study stress relaxation and the dislocation structure in a Si-doped GaN layer in comparison with an undoped layer grown under the same conditions by metalorganic vapor phase epitaxy on (11.0) Al2O3. Doping of the GaN by Si to a concentration of 3 x 10(18) cm(-3) was found to improve the layer quality. It decreases dislocation density from 5 x 10(9) (undoped layer) to 7 x 10(8) cm(-2) and changes the dislocation arrangement toward a more random distribution. Both samples were shown to be under biaxial compressive stress which was slightly higher in the undoped layer. The stress results in a blue shift of the emission energy and E(2) phonon peaks in the photoluminescence and Raman spectra. Thermal stress was partly relaxed by bending of threading dislocations into the basal plane. This leads to the formation of a three-dimensional dislocation network and a strain gradient along the c axis of the layer. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. MEIJO UNIV,DEPT ELECT & ELECTR ENGN,TEMPAKU KU,NAGOYA,AICHI 468,JAPAN. RP Ruvimov, S (reprint author), LAWRENCE BERKELEY LAB,DIV SCI MAT,MS 63-203,BERKELEY,CA 94720, USA. RI Liliental-Weber, Zuzanna/H-8006-2012; OI Ager, Joel/0000-0001-9334-9751 NR 16 TC 143 Z9 145 U1 1 U2 25 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 12 PY 1996 VL 69 IS 7 BP 990 EP 992 DI 10.1063/1.117105 PG 3 WC Physics, Applied SC Physics GA VB474 UT WOS:A1996VB47400042 ER PT J AU Grimsditch, M Karpov, VG AF Grimsditch, M Karpov, VG TI Fluctuations during melting SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Letter AB Fluctuations which involve the repetitive melting and recrystallization of crystals in equilibrium with their liquid are reported. The experiments were performed at constant volume and temperature inside a diamond anvil cell. The results, which we believe are the first to show the importance of temporal fluctuations during a first order phase transition, are not explained by any theory of Ostwald ripening. C1 UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637. LENINGRAD STATE TECH UNIV,ST PETERSBURG 195251,RUSSIA. RP Grimsditch, M (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Karpov, Victor/I-5169-2012; OI Karpov, Victor/0000-0003-2558-8368 NR 10 TC 5 Z9 5 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 12 PY 1996 VL 8 IS 33 BP L439 EP L444 DI 10.1088/0953-8984/8/33/001 PG 6 WC Physics, Condensed Matter SC Physics GA VC647 UT WOS:A1996VC64700001 ER PT J AU Smith, AB AF Smith, AB TI Neutron scattering and models: Iron SO NUCLEAR PHYSICS A LA English DT Article ID OPTICAL-MODEL; ELASTIC-SCATTERING; INELASTIC-SCATTERING; FINITE NUCLEI; FE-54; DEPENDENCE; CU-63 AB Differential elastic and inelastic neutron-scattering cross sections of elemental iron are measured from 4.5 to 10 MeV in increments of approximate to 0.5 MeV. The measurements are made at greater than or similar to 40 scattering angles distributed between approximate to 17 degrees and 160 degrees, with emphasis on elastic scattering and inelastic scattering due to the excitation of the yrast 2(+) state. The measured data is combined with earlier lower-energy results from this laboratory, with recent high-precision approximate to 9.5-15 MeV results from the Physikalisch. Technische Bundesanstalt and with selected values from the literature to provide a detailed neutron-scattering data base extending from approximate to 1.5 to 26 MeV. This data is interpreted in the context of spherical-optical and coupled-channels (vibrational and rotational) models, and the physical implications are discussed. Deformation, coupling, asymmetry and dispersive effects are explored. A good description of the interaction of neutrons with iron is achieved over the energy range less than or similar to 1.5-26 MeV, avoiding the dichotomy between high- and low-energy interpretations found in previous work in this mass region. C1 UNIV ARIZONA,TUCSON,AZ. RP Smith, AB (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 77 TC 12 Z9 13 U1 0 U2 0 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 AUG 12 PY 1996 VL 605 IS 3 BP 269 EP 289 DI 10.1016/0375-9474(96)00125-X PG 21 WC Physics, Nuclear SC Physics GA VD048 UT WOS:A1996VD04800001 ER PT J AU Randrup, J AF Randrup, J TI Amplification of pionic instabilities in high-energy collisions? SO PHYSICAL REVIEW LETTERS LA English DT Article ID DISORIENTED CHIRAL CONDENSATE; PHASE-TRANSITION; QUANTUM EVOLUTION; DOMAINS; FIELD; FORM; QCD AB Considering a variety of dynamical scenarios within the linear a model, we examine the conditions for pionic modes to be amplified as the chiral field relaxes towards the normal vacuum following the transient restoration of approximate chiral symmetry in a high-energy collision. While Bjorken-type longitudinal expansions appear to be insufficient for amplification for occur, analogous expansions in two or three dimensions may enhance the low-energy power spectrum by up to an order of magnitude. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, 1 CYCLOTRON RD, BERKELEY, CA 94720 USA. NR 24 TC 70 Z9 70 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 AUG 12 PY 1996 VL 77 IS 7 BP 1226 EP 1229 DI 10.1103/PhysRevLett.77.1226 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000009 ER PT J AU Young, PE Foord, ME Maximov, AV Rozmus, W AF Young, PE Foord, ME Maximov, AV Rozmus, W TI Stimulated Brillouin scattering in multispecies laser-produced plasmas SO PHYSICAL REVIEW LETTERS LA English DT Article ID ION-ACOUSTIC-WAVES; PARAMETRIC-INSTABILITIES; ELECTROMAGNETIC-WAVES; INHOMOGENEOUS PLASMAS; LIGHT; WAVELENGTH AB Growth and saturation of the stimulated Brillouin scattering (SBS) instability has been studied in C, CH, and CH2 laser-produced plasmas which have nearly identical density profiles. The backscattered reflectivity is highest for the CH2 plasma (similar to 15%) and up to similar to 5 times lower for the pure carbon plasma. This result is explained by the stationary inhomogeneous theory of SBS and confirmed by numerical simulations provided one allows for the nonuniform expansion of hydrogen and carbon ions that leads to an axial asymmetry of the SBS gain and results in the observation of a blueshifted scattered light spectrum from CH targets. C1 UNIV ALBERTA,INST THEORET PHYS,DEPT PHYS,EDMONTON,AB T6G 2J1,CANADA. RP Young, PE (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 26 TC 15 Z9 15 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 12 PY 1996 VL 77 IS 7 BP 1278 EP 1281 DI 10.1103/PhysRevLett.77.1278 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000022 ER PT J AU Tuszewski, M AF Tuszewski, M TI Enhanced radio frequency field penetration in an inductively coupled plasma SO PHYSICAL REVIEW LETTERS LA English DT Article ID MODEL; DISCHARGE; DENSITY AB The induced radio frequency magnetic fields of a low-frequency inductively coupled plasma are measured and modeled. The fields penetrate deep into the discharge, in contrast with existing predictions of field decay within a thin skin layer. Fluid calculations show that the enhanced penetration is due to a reduction of the plasma conductivity by the induced magnetic fields. RP Tuszewski, M (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 21 TC 28 Z9 28 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 AUG 12 PY 1996 VL 77 IS 7 BP 1286 EP 1289 DI 10.1103/PhysRevLett.77.1286 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000024 ER PT J AU Moody, JD MacGowan, BJ Hinkel, DE Kruer, WL Williams, EA Estabrook, K Berger, RL Kirkwood, RK Montgomery, DS Shepard, TD AF Moody, JD MacGowan, BJ Hinkel, DE Kruer, WL Williams, EA Estabrook, K Berger, RL Kirkwood, RK Montgomery, DS Shepard, TD TI First optical observation of intensity dependent laser beam deflection in a flowing plasma SO PHYSICAL REVIEW LETTERS LA English DT Article ID LIGHT FILAMENTATION AB The intensity dependent deflection of a laser beam traversing an exploding foil plasma is measured for the first time. An incident f/8 probe beam exhibits deflection of up to 6 degrees and angular spreading of as much as a 17 degrees cone angle (f/3.3) as it exits a preformed plasma with significant plasma flow. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RP Moody, JD (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. OI Montgomery, David/0000-0002-2355-6242 NR 11 TC 34 Z9 35 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 AUG 12 PY 1996 VL 77 IS 7 BP 1294 EP 1297 DI 10.1103/PhysRevLett.77.1294 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000026 ER PT J AU Hinkel, DE Williams, EA Still, CH AF Hinkel, DE Williams, EA Still, CH TI Laser beam deflection induced by transverse plasma flow SO PHYSICAL REVIEW LETTERS LA English DT Article ID LIGHT; FILAMENTATION AB Recent experiments in gas-filled hohlraums suggest that laser beams refract more than calculated by the hydrocode LASNEX. Three-dimensional simulations show that filamentation or forward Brillouin scattering in flowing plasma causes a deflection in the inferred direction of the appropriate magnitude. Simulations also show that temporal beam smoothing can suppress this effect. RP Hinkel, DE (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 17 TC 44 Z9 44 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 12 PY 1996 VL 77 IS 7 BP 1298 EP 1301 DI 10.1103/PhysRevLett.77.1298 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000027 ER PT J AU Maiti, A Chisholm, MF Pennycook, SJ Pantelides, ST AF Maiti, A Chisholm, MF Pennycook, SJ Pantelides, ST TI Dopant segregation at semiconductor grain boundaries through cooperative chemical rebonding SO PHYSICAL REVIEW LETTERS LA English DT Article ID TOTAL-ENERGY CALCULATIONS; PSEUDOPOTENTIALS; SILICON AB Recent theoretical work found that isolated As impurities in Ge grain boundaries exhibit minimal binding, leading to the suggestion that the observed segregation is likely to occur at defects and steps. We report ab initio calculations for As in Si and show that segregation is possible at defect-free boundaries through the cooperative incorporation of As in threefold-coordinated configurations: As dimers, or ordered chains of either As atoms or As dimers along the grain boundary dislocation cores. Finally, we find that As segregation may drive structural transformations of certain grain boundaries. C1 VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235. RP Maiti, A (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. NR 20 TC 52 Z9 52 U1 0 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 12 PY 1996 VL 77 IS 7 BP 1306 EP 1309 DI 10.1103/PhysRevLett.77.1306 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000029 ER PT J AU Jesson, DE Chen, KM Pennycook, SJ Thundat, T Warmack, RJ AF Jesson, DE Chen, KM Pennycook, SJ Thundat, T Warmack, RJ TI Morphological evolution of strained films by cooperative nucleation SO PHYSICAL REVIEW LETTERS LA English DT Article ID SURFACE-MORPHOLOGY; LAYERS; GROWTH; GE; RELAXATION; STABILITY; EPITAXY; SI(100) AB We identify a new mechanism of stress driven surface morphological evolution in strained semiconductor films. Surface roughness forms by a cooperative mechanism involving the sequential nucleation of islands and pits, which is distinct from the conventional view of ripple formation as an Asaro-Tiller-Grinfeld (ATG) instability. This mechanism is operative both during annealing and growth and competes with the ATG instability as a kinetic pathway to ripple formation. C1 OAK RIDGE NATL LAB,HLTH SCI RES DIV,OAK RIDGE,TN 37831. RP Jesson, DE (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. OI Jesson, David/0000-0003-0897-1445; Warmack, Robert/0000-0001-8298-2420 NR 19 TC 137 Z9 139 U1 2 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 12 PY 1996 VL 77 IS 7 BP 1330 EP 1333 DI 10.1103/PhysRevLett.77.1330 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000035 ER PT J AU Zachar, O Kivelson, SA Emery, VJ AF Zachar, O Kivelson, SA Emery, VJ TI Exact results for a 1D Kondo lattice from bosonization SO PHYSICAL REVIEW LETTERS LA English DT Article ID MODEL AB A one-dimensional electron gas interacting with a lattice of Kondo scattering centers is solved in a particular limit. A variety of exact results are obtained for commensurate and incommensurate fillings, for impurity vacancy states, and for the commensurate-incommensurate transition. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP Zachar, O (reprint author), UNIV CALIF LOS ANGELES,DEPT PHYS,405 HILGARD AVE,LOS ANGELES,CA 90024, USA. NR 11 TC 81 Z9 81 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 AUG 12 PY 1996 VL 77 IS 7 BP 1342 EP 1345 DI 10.1103/PhysRevLett.77.1342 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000038 ER PT J AU Larson, BC Tischler, JZ Isaacs, ED Zschack, P Fleszar, A Eguiluz, AG AF Larson, BC Tischler, JZ Isaacs, ED Zschack, P Fleszar, A Eguiluz, AG TI Inelastic X-ray scattering as a probe of the many-body local-field factor in metals SO PHYSICAL REVIEW LETTERS LA English DT Article ID DYNAMIC STRUCTURE FACTOR; ELECTRON-GAS; DIELECTRIC RESPONSE; OPTICAL-SPECTRUM; BAND-STRUCTURE; AL METAL; ALUMINUM; LIQUID; DENSITIES; LATTICE AB We report the first measurement of the many-body local-field factor G((q) over right arrow,omega) for a simple metal (Al) at large wave vectors. Inelastic x-ray measurements of the dynamical structure factor are analyzed using ab initio calculations of the noninteracting polarizability. Our measured G((q) over right arrow,omega) is in agreement with available theory for q < 1.5k(F), unlike earlier electron energy-loss results; however, for q similar to 2k(F) our G((q) over right arrow,omega) is a factor of 2 stronger than most theoretical predictions. We have also measured the polarizability for noninteracting electrons at a wave vector for which G((q) over right arrow,omega) congruent to 1. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37831. UNIV WURZBURG,INST PHYS,D-97074 WURZBURG,GERMANY. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. RP Larson, BC (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. NR 36 TC 39 Z9 39 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 12 PY 1996 VL 77 IS 7 BP 1346 EP 1349 DI 10.1103/PhysRevLett.77.1346 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000039 ER PT J AU Fullerton, EE Bader, SD Robertson, JL AF Fullerton, EE Bader, SD Robertson, JL TI Spin-density-wave antiferromagnetism of Cr in Fe/Cr(001) superlattices SO PHYSICAL REVIEW LETTERS LA English DT Article ID THIN-FILMS; FE(100); CHROMIUM; MAGNETORESISTANCE; MULTILAYERS; LAYERS AB The antiferromagnetic spin-density-wave (SDW) order of Cr layers in Fe/Cr(001) superlattices was investigated by neutron scattering. For Cr thicknesses from 51 to 190 Angstrom, a transverse SDW is formed for all temperatures below the Neel temperature with a single wave vector Q normal to the layers. A coherent magnetic structure forms with the nodes of the SDW near the Fe-Cr interfaces, and the magnetic coherence length greater than the Cr layer thickness. The results and modeling provide a direct confirmation of the persistence of bulklike antiferromagnetic SDW order in the Cr. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP Fullerton, EE (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Fullerton, Eric/H-8445-2013 OI Fullerton, Eric/0000-0002-4725-9509 NR 26 TC 108 Z9 108 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 AUG 12 PY 1996 VL 77 IS 7 BP 1382 EP 1385 DI 10.1103/PhysRevLett.77.1382 PG 4 WC Physics, Multidisciplinary SC Physics GA VB330 UT WOS:A1996VB33000048 ER PT J AU Tang, J AF Tang, J TI Coherent states and squeezed states of massless and massive relativistic harmonic oscillators SO PHYSICS LETTERS A LA English DT Article ID PHASE-SPACE REPRESENTATION AB Coherent states and squeezed states for photons and massive relativistic harmonic oscillators are investigated. Using Schwinger's dual-bosonic representation, a squeezed state is shown to be a coherent particle-antiparticle state that can be constructed by generators of SO(2, 1). The squeezing effects can be caused either by the Lorentz boost or a transformation between frames at a constant acceleration. RP Tang, J (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Tang, Jau/D-8382-2012 OI Tang, Jau/0000-0003-2078-1513 NR 25 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 12 PY 1996 VL 219 IS 1-2 BP 33 EP 40 DI 10.1016/0375-9601(96)00358-1 PG 8 WC Physics, Multidisciplinary SC Physics GA VD421 UT WOS:A1996VD42100006 ER PT J AU Davidson, RC Chao, EH AF Davidson, RC Chao, EH TI Electrostatic instability for azimuthal mode number l=1 induced by electron-neutral collisions in a strongly-magnetized nonneutral electron plasma SO PHYSICS LETTERS A LA English DT Article ID THERMAL-EQUILIBRIUM; TRANSPORT; ASYMMETRIES; TIME AB We investigate the electrostatic stability properties of a nonneutral electron plasma interacting with background neutral gas through elastic collisions with constant collision frequency nu(en). The theoretical model treats the electrons as a strongly magnetized fluid (omega(pe)(2)/omega(ce)(2) much less than 1) immersed in a uniform magnetic field B-0 (e) over cap(z)$, and assumes small-amplitude perturbations azimuthal mode number l=1 and negligible axial variation (partial derivative/partial derivative(z)=0). The stability analysis, carried out to first order in nu(en)/omega(ce)much less than 1, shows that the real oscillation frequency and growth rate for the l=1 diocotron mode are given, respectively, by the simple expressions Re omega=omega(0), and Im omega=(nu(en)/omega(ce))omega(0). Here, omega(0)=Nec/r(w)(2)B(0), where r(w) is the perfectly conducting wall radius, and N=integral d(2)x n is the number of electrons per unit axial length. This analysis suggests that a measurement of the oscillation frequency and growth rate for the l=1 diocotron mode can be used to infer nu(en), and thereby serve as a sensor for the background neutral pressure. RP Davidson, RC (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 17 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 12 PY 1996 VL 219 IS 1-2 BP 95 EP 101 DI 10.1016/0375-9601(96)00360-X PG 7 WC Physics, Multidisciplinary SC Physics GA VD421 UT WOS:A1996VD42100015 ER PT J AU Kislyi, VP Nikishin, KG Kruglova, EY Shestopalov, AM Semenov, VV Gakh, AA Buchanan, AC AF Kislyi, VP Nikishin, KG Kruglova, EY Shestopalov, AM Semenov, VV Gakh, AA Buchanan, AC TI Regioselective synthesis and S-derivatization reactions of 4- and 6-trifluoromethyl-3-cyano-2(1H)-pyridinethiones SO TETRAHEDRON LA English DT Article ID STEREOSELECTIVE SYNTHESIS; NITRILE CYCLIZATION; TRANSFORMATION AB The regioselective synthesis of the title compounds was developed on the basis of condensation reactions of trifluoroacetylacetone and its methyl enacetal with cyanothioacetamide in the presence of bases. Thus, the condensation of trifluoroacetylacetone with cyanothioacetamide yields predominantly 4-trifluoromethyl-6-methyl-3-cyano-2(1H)-pyridinethiones, whereas the methyl enacetal of trifluorcacetylacetone gives exclusively the 6-trifluoromethyl-4-methyl isomer. S-Alkylation of the trifluoromethyl-pyridinethione salts can be achieved using methyl iodide or bromoacetophenone in DMF-water. Bromoacetophenone derivatives can be further transformed into 3-aminothieno[2,3-b]pyridines in the presence of excess KOH. Copyright (C) 1996 Elsevier Science Ltd C1 ND ZELINSKII INST ORGAN CHEM,MOSCOW 117418,RUSSIA. OAK RIDGE NATL LAB,CHEM & ANALYT SCI DIV,OAK RIDGE,TN 37831. NR 7 TC 21 Z9 21 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0040-4020 J9 TETRAHEDRON JI Tetrahedron PD AUG 12 PY 1996 VL 52 IS 33 BP 10841 EP 10848 DI 10.1016/0040-4020(96)00632-1 PG 8 WC Chemistry, Organic SC Chemistry GA VB815 UT WOS:A1996VB81500003 ER PT J AU Carman, TS Litveninko, V Madey, J Neuman, C Norum, B OShea, PG Roberson, NR Scarlett, CY Schreiber, E Weller, HR AF Carman, TS Litveninko, V Madey, J Neuman, C Norum, B OShea, PG Roberson, NR Scarlett, CY Schreiber, E Weller, HR TI The TUNL-FELL inverse Compton gamma-ray source as a nuclear physics facility SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID CHIRAL PERTURBATION-THEORY; PION-PHOTOPRODUCTION; ONE LOOP; REGION; BEAMS AB A new technique for producing an intense beam of polarized gamma-rays is presented. This High-Intensity Gamma-ray Source (HIGS) will utilize the facilities of the new Duke Free Electron Laser Laboratory. This system includes the LINAC injector, the 1.3 GeV electron storage ring, and the OK-4 undulator. It will be shown that it is possible to tune the electron beam in a manner which allows the FEL photons to backscatter from an electron bunch, all within the ring. This leads to an intense beam of almost 100% linearly polarized gamma-rays whose energy can be readily tuned from about 5 to greater than 200 MeV. Furthermore, beam energy spreads of less than 1% can be obtained by pure geometrical collimation. Derails of the beam properties and background sources will be presented. It will be shown that this is an ideal beam for nuclear physics and nuclear astrophysics studies. One example of this which takes advantage of the flux, energy resolution and polarization of the beam, is the study of Delta(33) excitations in finite nuclei. These intense polarized beams will also make it possible to perform precision measurements of the nucleon polarizabilities. And we will see that studies in the vicinity of the photo-pion production threshold can provide crucial tests of many of the recent predictions (Low Energy Theorems) of Chiral Perturbation Theory. Our final example will show how the very intense beams available at low energies can be used to determine astrophysically important capture cross sections by measurements of the inverse reactions. C1 DUKE UNIV,FREE ELECTRON LASER LAB,DURHAM,NC. UNIV VIRGINIA,CHARLOTTESVILLE,VA. TRIANGLE UNIV NUCL LAB,DURHAM,NC 27706. DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. RP Carman, TS (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 33 TC 13 Z9 13 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 1 EP 20 PG 20 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200001 ER PT J AU Koetke, DD Fisk, RJ Koetke, DS Dombeck, T AF Koetke, DD Fisk, RJ Koetke, DS Dombeck, T TI A direct-current pion focusing magnet for low energy in-flight muon-neutrino beams SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID PROTONS; THRESHOLD; CARBON AB A cylindrically-symmetric, direct-current magnet has been designed for use in the focusing of pions to improve the muon-neutrino flux obtained from decays in-flight at low energy accelerators. The device uses conventional magnet technology with specially designed field-shaping windings to achieve optimized focusing for positive pions and defocusing for negative pions. A prototype magnet has been constructed and its magnetic field map used in a ray tracing program from which it has been calculated that a factor of four improvement in the neutrino flux at a downstream detector can be realized when compared to an unfocused pion source. The design approach taken in this paper to select the appropriate coil distribution to optimize focusing may be applicable in other types of particle beam lines as well as in high energy collider detectors where toroidal magnet geometries have been proposed. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP Koetke, DD (reprint author), VALPARAISO UNIV, VALPARAISO, IN 46383 USA. NR 20 TC 1 Z9 1 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 27 EP 34 DI 10.1016/0168-9002(96)00085-X PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200003 ER PT J AU Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Alvsvaag, SJ Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbiellini, G Bardin, DY Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Bosworth, S Botner, O Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Puschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carrilho, P Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V Charpentier, P Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Dufour, Y Dupont, F Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B Santo, ME Falaleev, V Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Karyukhin, A Katsanevas, S Katsoufis, EC Keranen, R Khomenko, BA Khovanski, NN King, B Kjaer, NK Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Aguera, MAL Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Marson, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M MCCubbin, M McKay, R McNulty, R Medbo, J Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Perevozchikov, V Pernegger, H Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnov, O Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G AF Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Alvsvaag, SJ Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbiellini, G Bardin, DY Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Benvenuti, AC Berggren, M Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Blyth, S Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Bosworth, S Botner, O Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brillault, L Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Puschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carrilho, P Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Cerrito, L Chabaud, V Charpentier, P Chaussard, L Chauveau, J Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Dufour, Y Dupont, F Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Ershaidat, N Erzen, B Santo, ME Falaleev, V Falk, E Fassouliotis, D Feindt, M Fenyuk, A Ferrer, A Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gerdyukov, L Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK Jonsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Karyukhin, A Katsanevas, S Katsoufis, EC Keranen, R Khomenko, BA Khovanski, NN King, B Kjaer, NK Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamblot, S Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Liko, D Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Aguera, MAL Loukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malychev, V Mandl, F Marco, J Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Marson, T MartinezRivero, C MartinezVidal, F Garcia, SMI Masik, J Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M MCCubbin, M McKay, R McNulty, R Medbo, J Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Neumann, W Neumeister, N Nicolaidou, R Nielsen, BS Nieuwenhuizen, M Nikolaenko, V Niss, P Nomerotski, A Normand, A OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Perevozchikov, V Pernegger, H Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Pindo, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnov, O Smith, GR Solovianov, O Sosnowski, R SouzaSantos, D Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tchikilev, O Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Toet, DZ Tomaradze, A Tome, B Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanDoninck, WK VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zuberi, R Zucchelli, GC Zumerle, G TI Performance of the DELPHI detector SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID DENSITY PROJECTION CHAMBER; IMAGING CHERENKOV DETECTOR; RADIATIVE-CORRECTIONS; LEP; SIMULATION; ENERGIES; Z(0); SCATTERING; PROGRAM; SYSTEM AB DELPHI (DEtector with Lepton, Photon and Hadron Identification) is a detector for e(+)e(-) physics, designed to provide high granularity over a 4 pi solid angle, allowing an effective particle identification, It has been operating at the LEP (Large Electron-Positron) collider at CERN since 1989. This article reviews its performance. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM. FREE UNIV BRUSSELS, IIHE, B-1050 BRUSSELS, BELGIUM. UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. CTR BRASILEIRO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL. UNIV ESTADUAL RIO DE JANEIRO, INST FIS, RIO DE JANEIRO, BRAZIL. COMENIUS UNIV BRATISLAVA, FAC MATH & PHYS, BRATISLAVA 84215, SLOVAKIA. COLL FRANCE, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-75231 PARIS 05, FRANCE. CERN, CH-1211 GENEVA 23, SWITZERLAND. UL, CNRS, IN2P3, CTR RECH NUCL, F-67037 STRASBOURG, FRANCE. NCSR DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. CAS, DIV HIGH ENERGY PHYS, INST PHYS, FZU, PRAGUE 18040 8, CZECH REPUBLIC. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. IST NAZL FIS NUCL, I-16146 GENOA, ITALY. UNIV GRENOBLE 1, CNRS, IN2P3, INST SCI NUCL, F-38026 GRENOBLE 1, FRANCE. SEFT, HIGH ENERGY PHYS RES INST, HELSINKI 00014, FINLAND. JOINT INST NUCL RES, DUBNA 101000, RUSSIA. UNIV KARLSRUHE, INST EXPTL KERNPHYS, D-76128 KARLSRUHE, GERMANY. INST NUCL PHYS, PL-30055 KRAKOW, POLAND. Univ Min & Met Krakow, PL-30055 Krakow, POLAND. UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND. LIP, INST SUPER TECN, FCUL, P-1000 LISBON, PORTUGAL. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND. UNIV PARIS 06, CNRS, IN2P3, LPNHE, F-75252 PARIS 05, FRANCE. UNIV PARIS 07, CNRS, IN2P3, LPNHE, F-75252 PARIS 05, FRANCE. LUND UNIV, DEPT PHYS, S-22363 LUND, SWEDEN. UNIV LYON 1, IPNL, IN2P3, CNRS, F-69622 VILLEURBANNE, FRANCE. UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN. UNIV AIX MARSEILLE 2, CPP, IN2P3, CNRS, F-13288 MARSEILLE 09, FRANCE. NIELS BOHR INST, DK-2100 COPENHAGEN O, DENMARK. CHARLES UNIV, MFF, NUCL CTR, PRAGUE 18000 8, CZECH REPUBLIC. NIKHEF H, NL-1009 DB AMSTERDAM, NETHERLANDS. NATL TECH UNIV ATHENS, DEPT PHYS, ATHENS 15773, GREECE. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV OVIEDO, DEPT FIS, OVIEDO 33006, SPAIN. UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY. IST NAZL FIS NUCL, I-35131 PADUA, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV ROMA TOR VERGATA, DIPARTIMENTO FIS, I-00173 ROME, ITALY. IST NAZL FIS NUCL, I-00173 ROME, ITALY. CEA SACLAY, DSM, DAPNIA, F-91191 GIF SUR YVETTE, FRANCE. IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY. UC, CSIC, INST FIS CANTABRIA, SANTANDER 39006, SPAIN. INST HIGH ENERGY PHYS, PROTVINO, RUSSIA. UNIV LJUBLJANA, JOZEF STEFAN INST, LJUBLJANA 61000, SLOVENIA. UNIV LJUBLJANA, DEPT PHYS, LJUBLJANA 61000, SLOVENIA. UNIV STOCKHOLM, FYSIKUM, S-11385 STOCKHOLM, SWEDEN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY. IST NAZL FIS NUCL, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. UNIV FED RIO DE JANEIRO, BR-21945970 RIO DE JANEIRO, BRAZIL. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. UNIV VALENCIA, CSIC, IFIC, E-46100 BURJASSOT, SPAIN. UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN. AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WARSAW, PL-00681 WARSAW, POLAND. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, D-42097 WUPPERTAL 1, GERMANY. RP Abreu, P (reprint author), UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, IN2P3, CNRS, BAT 200, F-91405 ORSAY, FRANCE. RI Karyukhin, Andrey/J-3904-2014; Rames, Jiri/H-2450-2014; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Navas, Sergio/N-4649-2014; Barao, Fernando/O-2357-2016; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; Cabrera Urban, Susana/H-1376-2015; Ferrer, Antonio/H-2942-2015; Matorras, Francisco/I-4983-2015; Rovelli, Tiziano/K-4432-2015; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Michelotto, Michele/A-9571-2013; Mundim, Luiz/A-1291-2012; Yip, Kin/D-6860-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Chudoba, Jiri/G-7737-2014; Andreazza, Attilio/E-5642-2011; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Peralta, Luis/C-8369-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; de Paula, Leandro/I-9278-2012 OI DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; Karyukhin, Andrey/0000-0001-9087-4315; Maio, Amelia/0000-0001-9099-0009; De Angelis, Alessandro/0000-0002-3288-2517; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Navas, Sergio/0000-0003-1688-5758; Barao, Fernando/0000-0002-8346-9941; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368; Matteuzzi, Clara/0000-0002-4047-4521; Tome, Bernardo/0000-0002-7564-8392; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; Ferrer, Antonio/0000-0003-0532-711X; Matorras, Francisco/0000-0003-4295-5668; Rovelli, Tiziano/0000-0002-9746-4842; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Smirnova, Oxana/0000-0003-2517-531X; PREST, MICHELA/0000-0003-3161-4454; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Michelotto, Michele/0000-0001-6644-987X; Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Andreazza, Attilio/0000-0001-5161-5759; Peralta, Luis/0000-0002-3834-1762; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; de Paula, Leandro/0000-0002-4984-7734 NR 80 TC 317 Z9 317 U1 2 U2 38 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 57 EP 100 DI 10.1016/0168-9002(96)00463-9 PG 44 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200006 ER PT J AU Adams, M Amos, N Averill, DA Baringer, P Bross, A Chung, M Hsieh, F Li, H Lincoln, D Margulies, S Neal, H Neis, E Oesch, L Qian, J Rijssenbeek, M AF Adams, M Amos, N Averill, DA Baringer, P Bross, A Chung, M Hsieh, F Li, H Lincoln, D Margulies, S Neal, H Neis, E Oesch, L Qian, J Rijssenbeek, M TI A new detector technique using triangular scintillating strips to measure the position of minimum ionizing particles SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID FIBER; TRACKING; READOUT AB We present a new technique for measuring the position where a charged particle transits a detector which achieves a position resolution much better than the granularity of the detector. This is accomplished by using scintillating strips with a triangular cross-section and an axial wavelength shifting fiber readout. We tested strips with a base of 9 mm and a height of 4.5 mm and achieved a position resolution of 567 mu m with over 60000 cosmic ray data points per strip, we are able to precisely characterize the performance of this detector design. In addition, we offer suggestions for future improvements in the achievable position resolution. Additional performance results, including uniformity and yield, are also discussed. C1 UNIV MICHIGAN,ANN ARBOR,MI 48109. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ILLINOIS,CHICAGO,IL 60607. SUNY STONY BROOK,STONY BROOK,NY 11794. NR 14 TC 9 Z9 9 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 131 EP 142 DI 10.1016/0168-9002(96)00425-1 PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200009 ER PT J AU Cribier, M Gosset, L Lamare, P Languillat, JC Perrin, P Renard, M Rich, J Soirat, JP Spiro, M Stolarczyk, T Tao, C Vignaud, D Bevilacqua, A Caperan, F Dupont, G Gorry, J Hampel, W Heusser, G Kirsten, T Pernicka, E Schlosser, C Sann, M vonAmmon, R Henrich, E Altmann, M Mossbauer, R Bellotti, E Cattadori, C Fiorini, E Latorre, S Balata, M Franciotti, D Lembo, L Bacci, C Belli, P Boger, J Hahn, RL Hartmann, FX Chu, YY Prusakov, VN Tikhomirov, AV AF Cribier, M Gosset, L Lamare, P Languillat, JC Perrin, P Renard, M Rich, J Soirat, JP Spiro, M Stolarczyk, T Tao, C Vignaud, D Bevilacqua, A Caperan, F Dupont, G Gorry, J Hampel, W Heusser, G Kirsten, T Pernicka, E Schlosser, C Sann, M vonAmmon, R Henrich, E Altmann, M Mossbauer, R Bellotti, E Cattadori, C Fiorini, E Latorre, S Balata, M Franciotti, D Lembo, L Bacci, C Belli, P Boger, J Hahn, RL Hartmann, FX Chu, YY Prusakov, VN Tikhomirov, AV TI Production of a 62 PBq Cr-51 low energy neutrino source for GALLEX SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SOLAR NEUTRINOS; ISOTOPE-SEPARATION; ENRICHMENT; CALIBRATION; DETECTORS; SYSTEM AB We describe the production of a 62 PBq (62 x 10(15) Bq) source of similar to 750 keV neutrinos coming from the electron capture decay of Cr-51. This is the first time that such a high-intensity, low-energy neutrino source has been produced, The rationale for having such a source is to check the overall procedures of the radiochemical solar neutrino experiment, GALLEX, The source was obtained by neutron activation of 36 kg of enriched chromium at the Siloe reactor at Grenoble, The enriched chromium (containing 38.6% of Cr-50 compared to 4.35% for natural chromium) was produced by the Kurchatov Institute in Moscow, in the form of CrO3. It was then electrolyzed in Saclay to obtain chromium metal tubes, which were subsequently broken into coarse chips of typically 1 mm(3) volume. The chromium chips were put inside 12 special zircalloy irradiation cells that were then placed around the Siloe reactor core, which had been specially reconfigured for this irradiation. The irradiation lasted for 23.8 days, Then the activated chromium was transferred in a stainless-steel container into a sealed tungsten shield having a wall thickness of 8.5 cm. The Cr-51 activity at the end of the irradiation (EOB) has been measured to have a mean value of (62.5 +/- 0.4) PBq, using several techniques: by neutronics and gamma scanning in the reactor shortly after EOB, with an ionization chamber, by calorimetry, and, after a considerable decay period, by gamma-ray spectroscopy and measurement of the non-radioactive V-51 daughter. The source resided in the center of the GALLEX detector at the Gran Sasso Underground Laboratory between June 23, 1994 and October 10, 1994, irradiating the gallium target with a neutrino intensity well above the solar neutrino background. The results of this full-scale test are in good agreement with the expected efficiency of the entire GALLEX experiment calculated as a product of the known efficiencies of the various parts of the experimental procedure. C1 CE GRENOBLE,SRS,CEA,F-38041 GRENOBLE,FRANCE. CEA SACLAY,LMRI,DAMRI,DTA,F-91191 GIF SUR YVETTE,FRANCE. MAX PLANCK INST KERNPHYS,D-69029 HEIDELBERG,GERMANY. FORSCHUNGSZENTRUM KARLSRUHE,DEPT PHYS E15,D-76021 KARLSRUHE,GERMANY. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. LAB NAZL GRAN SASSO,I-67010 ASSERGI AQUILA,ITALY. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00133 ROME,ITALY. IST NAZL FIS NUCL,I-00133 ROME,ITALY. BROOKHAVEN NATL LAB,UPTON,NY 11973. IV KURCHATOV ATOM ENERGY INST,INST MOL PHYS,RUSSIAN RES CTR,MOSCOW 123182,RUSSIA. COLL FRANCE,LPC,F-75231 PARIS 05,FRANCE. UNIV ROME 3,DIPARTIMENTO FIS,I-00100 ROME,ITALY. RP Cribier, M (reprint author), CEA SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. RI Belli, Pierluigi/H-1942-2012 OI Belli, Pierluigi/0000-0003-4517-4891 NR 48 TC 35 Z9 35 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 233 EP 250 DI 10.1016/0168-9002(96)00464-0 PG 18 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200019 ER PT J AU Greenwood, RC Putnam, MH Watts, KD AF Greenwood, RC Putnam, MH Watts, KD TI Ground-state beta(-)-branching intensities of several fission-product isotopes measured using a total absorption gamma-ray spectrometer SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID MASS CHAINS; BETA-DECAY; DISTRIBUTIONS AB The final set of results of ''ground-state'' beta(-)-branching intensities obtained in a program of systematic study of those regions of the fission-product nuclides accessible to investigation using the Cf-252-based INEL ISOL facility are presented. A total absorption gamma-ray spectrometer, operating in a 4 pi gamma-beta coincidence mode, was used to obtain these ''ground-state'' beta(-)-branching intensities; where here the ''ground-state'' is defined to include all states below a selected gamma-ray discriminator level. Results obtained for Rb-89, Rb-90g, Rb-91, Rb-93, Sr-93, Sr-94, Y-94, Sr-95, Y-95, (CS)-C-140, La-142, Ba-143, La-143, Ba-144, La-144, Ba-145, La-145, Ce-146, (146)pr, Ce-147, Pr-147, Ce-148, Pr-148 (2.27 min), Pr-149, Nd-149, Pr-151, Nd-151, Pm-152 (4.1 min), Nd-153, Nd-155, Pm-157, Sm-157,Sm-158 and Eu-158 are presented and compared with existing published data. C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP Greenwood, RC (reprint author), UNIV IDAHO,DEPT PHYS,MOSCOW,ID 83844, USA. NR 76 TC 21 Z9 21 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 AUG 11 PY 1996 VL 378 IS 1-2 BP 312 EP 320 DI 10.1016/0168-9002(96)00209-4 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA VB362 UT WOS:A1996VB36200029 ER PT J AU Dodelson, S Gates, E Stebbins, A AF Dodelson, S Gates, E Stebbins, A TI Cold plus hot dark matter and the cosmic microwave background SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmic microwave background; cosmology, theory; dark matter; elementary particles ID LARGE-SCALE STRUCTURE; RADIATION ANISOTROPY; EXPANDING UNIVERSE; REIONIZATION; FLUCTUATIONS; MAPS AB We examine the cosmic microwave background power spectrum for adiabatic models with a massive neutrino component. We present the results of a detailed numerical evolution of cold + hot dark matter (CHDM) models and compare these results with the standard cold dark matter (CDM) spectrum. The difference is of order 5%-10% for 400 < l < 1000 for currently popular CHDM models. Using semianalytic approximations, we also discuss the relevant physics involved. Finally, we remark on the ability of future experiments to differentiate between these models. An all-sky experiment with a beam size smaller than 30' can distinguish between CHDM and CDM if other cosmological parameters are known. Even allowing other parameters to vary, it may be possible to distinguish CDM from CHDM. C1 UNIV CHICAGO, DEPT ASTRON & ASTROPHYS, ENRICO FERMI INST, CHICAGO, IL 60637 USA. RP Dodelson, S (reprint author), FERMILAB NATL ACCELERATOR LAB, NASA, FERMILAB ASTROPHYS CTR, BATAVIA, IL 60510 USA. NR 37 TC 89 Z9 89 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 1996 VL 467 IS 1 BP 10 EP 18 DI 10.1086/177581 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VB703 UT WOS:A1996VB70300002 ER PT J AU Minniti, D Alonso, MV Goudfrooij, P Jablonka, P Meylan, G AF Minniti, D Alonso, MV Goudfrooij, P Jablonka, P Meylan, G TI Globular clusters in the inner regions of NGC 5128 (Centaurus A) SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies, abundances; galaxies, individual (NGC 5128); galaxies, interactions; galaxies, star clusters ID EARLY-TYPE GALAXIES; COMPOSITE STELLAR-SYSTEMS; STAR-CLUSTERS; MAGELLANIC CLOUDS; PLANETARY CAMERA; WIDE-FIELD; INFRARED PHOTOMETRY; NGC-5128; CALIBRATION; METALLICITY AB We have identified 26 new globular cluster candidates in the inner 3 kpc of NGC 5128 (Centaurus A), the nearest known large galaxy that is the probable product of a merger. The clusters are selected on the basis of their structural parameters (observed core diameters and ellipticities), as measured from archival Wide Field Planetary Camera (WFPC) Hubble Space Telescope (HST) images. IR photometry obtained with IRAC2B at the ESO/MPI 2.2 m telescope is combined with the optical HST photometry. Most of these clusters have normal colors typical of old globular clusters like those found in the Milky Way and M31. We estimate their metal abundances based on the R-K-0 color, confirming the existence of a metallicity gradient in the inner regions of NGC 5128. The presence of metal-rich globular clusters suggests that one of the colliding galaxies was a bulge-dominated galaxy (E or early S). A few clusters have colors and magnitudes similar to intermediate-age clusters containing carbon stars in the Magellanic Clouds. If the intermediate-age clusters were formed during a merger, then this episode must have occurred a few gigayears ago. Alternatively, we are looking at the cluster members of one of the colliding galaxies, which would then have been a late-type disk galaxy. C1 EUROPEAN SO OBSERV,D-85748 GARCHING,GERMANY. ASTRON OBSERV,RA-5000 CORDOBA,ARGENTINA. OBSERV PARIS,MEUDON SECT,F-92195 MEUDON,FRANCE. RP Minniti, D (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,MS L-413,LIVERMORE,CA 94551, USA. NR 55 TC 31 Z9 31 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 1996 VL 467 IS 1 BP 221 EP & DI 10.1086/177597 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VB703 UT WOS:A1996VB70300018 ER PT J AU Minniti, D Zijlstra, AA AF Minniti, D Zijlstra, AA TI Dwarf galaxies also have stellar halos SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies, halos; galaxies, individual (WLM [DDO 221], A2359-1544, UGC A444); galaxies, irregular; galaxies, stellar content; galaxy, formation; Local Group ID RED GIANT BRANCH; IRREGULAR GALAXIES; NEARBY GALAXIES; CLUSTERS; PHOTOMETRY; KINEMATICS; DISTANCE; STARS; WLM; TIP AB We present evidence for the existence of an old stellar halo in the dwarf irregular galaxy WLM, an isolated member of the Local Group. The halo consists of Population II stars, with low metallicities and age greater than or equal to 10(10) yr. The finding of a halo in a dwarf irregular galaxy argues for a generic mode of galaxy formation that requires a halo in the presence of a disk, regardless of galaxy size. This implies that formation mechanisms are similar along the spiral Hubble sequence, and favors the scenarios where the formation takes place during the original collapse and accretion of the protogalactic gas clouds. Halo formation also appears not necessarily to be related to the presence of a bulge, or a nucleus, since WLM lacks both of these components. C1 EUROPEAN SO OBSERV,D-85748 GARCHING,GERMANY. RP Minniti, D (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 36 TC 63 Z9 65 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 1996 VL 467 IS 1 BP L13 EP & DI 10.1086/310189 PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA VB702 UT WOS:A1996VB70200004 ER PT J AU Laaksonen, A McGraw, R AF Laaksonen, A McGraw, R TI Thermodynamics, gas-liquid nucleation, and size-dependent surface tension SO EUROPHYSICS LETTERS LA English DT Article ID HOMOGENEOUS NUCLEATION; NUCLEUS; RATES; WORK AB Phenomenological nucleation theories are considered from the viewpoint of Gibbs' surface thermodynamics. We point out, in defining the critical nucleus, that it is important to make a distinction between the number of molecules enclosed by the surface of tension and the excess number of molecules over the uniform vapor phase. We show that, the Kelvin equation should be employed in determining the size of the critical nucleus even if the nucleus free energy contains a size-dependent surface energy term. Furthermore, we make use of the fact that the classical form of Kelvin equation (containing the surface tension of a flat interface) predicts the equimolar radius of the critical nucleus well down to nuclei of about 40 molecules, and derive a new equation for the size-dependent surface tension that differs from the Tolman relation. Density functional calculations support the new formula. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,ENVIRONM CHEM DIV,UPTON,NY 11973. RP Laaksonen, A (reprint author), HELSINKI UNIV,DEPT PHYS,POB 9,HELSINKI 00014,FINLAND. RI Laaksonen, Ari/B-5094-2011 OI Laaksonen, Ari/0000-0002-1657-2383 NR 16 TC 38 Z9 38 U1 1 U2 9 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD AUG 10 PY 1996 VL 35 IS 5 BP 367 EP 372 DI 10.1209/epl/i1996-00121-4 PG 6 WC Physics, Multidisciplinary SC Physics GA VD156 UT WOS:A1996VD15600009 ER PT J AU Zheludev, A Tranquada, JM Vogt, T Buttrey, DJ AF Zheludev, A Tranquada, JM Vogt, T Buttrey, DJ TI Magnetic excitations and soft-mode transition in Pr2BaNiO5 SO EUROPHYSICS LETTERS LA English DT Article ID HALDANE-GAP; HEISENBERG-ANTIFERROMAGNET; NEUTRON-SCATTERING; SPIN DYNAMICS; MONTE-CARLO; STRUCTURAL CHARACTERIZATION; METAL OXIDE; CHAIN; Y2BANIO5; CSNICL3 AB The quasi-1-dimensional (1D) antiferromagnet Pr2BaNiO5 was studied by single-crystal inelastic neutron scattering. Magnetic gap excitations of 1D nature in the S = 1 Ni chains were observed above and below the Neel temperature T-N = 24 K. Two temperature-dependent magnetic-exciton bands were found and associated with a crystal field transition in Pr. One of these modes was found to undergo a complete softening at the antiferromagnetic wave vector as T --> T-N from above, driving the magnetic ordering. C1 UNIV DELAWARE,NEWARK,DE 19716. RP Zheludev, A (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Tranquada, John/A-9832-2009; Vogt, Thomas /A-1562-2011 OI Tranquada, John/0000-0003-4984-8857; Vogt, Thomas /0000-0002-4731-2787 NR 25 TC 17 Z9 17 U1 0 U2 0 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD AUG 10 PY 1996 VL 35 IS 5 BP 385 EP 390 DI 10.1209/epl/i1996-00124-7 PG 6 WC Physics, Multidisciplinary SC Physics GA VD156 UT WOS:A1996VD15600012 ER PT J AU Atwood, D Blok, B Soni, A AF Atwood, D Blok, B Soni, A TI Feasibility of extracting V-td from radiative B(B-s) decays SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article ID WEAK NONLEPTONIC DECAYS; CHARMED MESONS; LATTICE CALCULATION; STANDARD MODEL; B-MESONS; RARE; TRANSITION; B->S-GAMMA; CONSTANTS AB We use experimental information on D- --> K(*0)rho(-) and B --> psi + K*, coupled with flavor independence of QCD, and with vector meson dominance, to show that long distance (LD) contributions to B --> rho + gamma, especially to B- --> rho(-) + gamma, are potentially very serious. Estimates based on the annihilation graph are shown to lead to similar conclusions. We emphasize that LD contributions can be appreciably different in B- --> rho(-) + gamma and B-0 --> rho(0)(omega) + gamma. All radiative decays of B, B-s are shown to be governed essentially by two LD and two short distance (SD) hadronic entities. Despite the presence of considerable LD contributions, we show how separate measurements of B- --> rho(-) + gamma, B-0 --> rho(0)(omega) + gamma, along with B --> K* + gamma, can be used for a systematic extraction of V-td. Measurements of B-s --> phi + gamma and K-*0 + gamma could also provide very useful consistency checks. C1 TECHNION ISRAEL INST TECHNOL,INST THEORET PHYS,HAIFA,ISRAEL. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP Atwood, D (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 43 TC 22 Z9 22 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD AUG 10 PY 1996 VL 11 IS 20 BP 3743 EP 3759 DI 10.1142/S0217751X96001759 PG 17 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA UX342 UT WOS:A1996UX34200006 ER PT J AU Daboul, J Nieto, MM AF Daboul, J Nieto, MM TI Exact, E=0, quantum solutions for general power-law potentials SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article ID OSTROVSKY ATOMIC MODEL; DYNAMICAL SYMMETRY AB For zero energy, E = 0, we derive exact, quantum solutions for all power-law potentials, V(r) = -gamma/r(v), with gamma > 0 and -infinity < v < oo. The solutions are, in general, Bessel functions of powers of r. For v > 2 and l greater than or equal to 1 the solutions are normalizable. Surprisingly, the solutions for v < -2, which correspond to highly repulsive potentials, are also normalizable, for all l greater than or equal to 0. For these \v\ > 2 the partial-wave Hamiltonians, H-l, have overcomplete sets of normalizable eigensolutions. We discuss how to obtain self-adjoint extensions of H-l such that the above E = 0 solutions become included in their domains. When 2 > v greater than or equal to -2 the E = 0 solutions are not square-integrable. The v = 2 solutions are also unnormalizable, but are exceptional solutions. We also find that, by increasing the dimension of the Schrodinger equation beyond 4, an effective centrifugal barrier is created which is sufficient to cause binding when E = 0 and v > 2, even for l = 0. We discuss the physics of the above solutions and compare them to the corresponding classical solutions, which are derived elsewhere. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP Daboul, J (reprint author), BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL. NR 30 TC 17 Z9 17 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD AUG 10 PY 1996 VL 11 IS 20 BP 3801 EP 3817 DI 10.1142/S0217751X96001796 PG 17 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA UX342 UT WOS:A1996UX34200010 ER PT J AU Kraynik, AM Reinelt, DA AF Kraynik, AM Reinelt, DA TI Linear elastic behavior of dry soap foams SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article DE shear modulus; soap foam; minimal surfaces; Kelvin cell; Weaire-Phelan foam; Williams foam ID HIGHLY CONCENTRATED EMULSIONS; SHEAR MODULUS; 3-DIMENSIONAL FOAMS; MINIMAL-SURFACES; LIQUID FOAM; RHEOLOGY; COUNTEREXAMPLE; CONJECTURE; STRESS; MODEL AB Linear elastic constants are computed for three dry foams that have crystal symmetry, bubbles with equal volume V, and films with uniform surface tension T. The Kelvin, Williams, and Weaire-Phelan foams contain one, two, and eight bubbles in the unit cell, respectively. All three foams have 14-sided bubbles, hut these tetrakaidecahedra have different topology; the Weaire-Phelan foam also contains pentagonal dodecahedra. In addition to the bulk modulus for volume compression, we calculate two shear moduli for the Kelvin and Weaire-Phelan foams, which have cubic symmetry, and four shear moduli for the Williams foam, which has tetragonal symmetry. The Williams foam has five elastic constants, not six, because the stress remains isotropic for uniform expansion; this is not guaranteed by symmetry alone. The two shear moduli for the Weaire-Phelan foam differ by less than 5%. The other two foams exhibit much greater elastic anisotropy; their shear moduli differ by a factor of 2. An effective isotropic shear modulus (G) over bar, which represents the response averaged over all orientations, is evaluated for each foam. Scaled by T/V-1/3, (G) over bar is 0.8070, 0.7955, and 0.8684 for the Kelvin, Williams, and Weaire-Phelan foams, respectively. When extrapolated to the dry limit, the shear modulus data of Princen and Kiss (for concentrated oil-in-water emulsions with polydisperse drop-size distributions) fall within the range of our calculations. The Surface Evolver program, developed by Brakke, was used to compute minimal surfaces for the dry foams. Also reported for each undeformed foam are various geometric constants relating to interfacial energy density, cell edge length, and bubble pressure. (C) 1996 Academic Press, Inc. C1 SO METHODIST UNIV,DEPT MATH,DALLAS,TX 75275. RP Kraynik, AM (reprint author), SANDIA NATL LABS,DEPT 9112 MS 0834,ENGN SCI CTR,ALBUQUERQUE,NM 87185, USA. NR 37 TC 52 Z9 52 U1 5 U2 24 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD AUG 10 PY 1996 VL 181 IS 2 BP 511 EP 520 DI 10.1006/jcis.1996.0408 PG 10 WC Chemistry, Physical SC Chemistry GA UZ536 UT WOS:A1996UZ53600018 ER PT J AU Lueck, HB Swinney, TC Hudson, BS Friedrich, DM AF Lueck, HB Swinney, TC Hudson, BS Friedrich, DM TI Resonance Raman studies of benzene derivatives with strong conjugation: Nitrile substitution SO CHEMICAL PHYSICS LETTERS LA English DT Article ID EXCITED ELECTRONIC STATES; SPECTROSCOPY; SCATTERING; EXCITATION AB Raman spectra in resonance with the L(a) state of benzene derivatives exhibit activity in both the fundamental and two-quantum overtones of modes that are of e(2g) symmetry in benzene. The Raman spectra can be used to test proposals of Petruska that result in the conclusion that 1,2,3-trisubstituted benzenes should have L, transitions with very small allowed transition moments. We find that nitrile substitution results in absorption and resonance Raman spectra that show deviations from Petruska's rules. The 1,2,3-tricyano derivative exhibits Raman spectra that demonstrate allowed transition character. C1 UNIV OREGON,DEPT CHEM,EUGENE,OR 97403. UNIV OREGON,INST CHEM PHYS,EUGENE,OR 97403. PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 22 TC 9 Z9 9 U1 1 U2 3 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 AUG 9 PY 1996 VL 258 IS 1-2 BP 80 EP 86 DI 10.1016/0009-2614(96)00644-6 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VB494 UT WOS:A1996VB49400012 ER PT J AU Jellinek, J Krissinel, EB AF Jellinek, J Krissinel, EB TI NinAlm alloy clusters: Analysis of structural forms and their energy ordering SO CHEMICAL PHYSICS LETTERS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; ELECTRONIC-STRUCTURE; BIMETALLIC CLUSTERS; ALUMINUM CLUSTERS; METAL-CLUSTERS; IMPURITIES; HETEROCLUSTERS; EXCITATIONS AB Structural forms of model NInAlm, n+m = 13, alloy clusters are studied for all stoichiometric compositions using a many-body potential. These forms are distinguished by their geometries (isomers) and the distributions of the two types of atoms within a given geometry (homotops). General notions of mixing energy and mixing coefficient applicable to arbitrary, including many-body, potentials are introduced. It is shown that for each stoichiometry the energy ordering of the homotops, within classes defined by the isomeric form and the type of the central atom, is governed by the degree of mixing as measured by the mixing coefficient. C1 RUSSIAN ACAD SCI, INST WATER & ENVIRONM PROBLEMS, SIBERIAN BRANCH, BARNAUL 656099, RUSSIA. RP Jellinek, J (reprint author), ARGONNE NATL LAB, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 29 TC 136 Z9 137 U1 5 U2 12 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 AUG 9 PY 1996 VL 258 IS 1-2 BP 283 EP 292 DI 10.1016/0009-2614(96)00636-7 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VB494 UT WOS:A1996VB49400045 ER PT J AU Wilkins, JF Bitensky, MW Willardson, BM AF Wilkins, JF Bitensky, MW Willardson, BM TI Regulation of the kinetics of phosducin phosphorylation in retinal rods SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID DEPENDENT PROTEIN-KINASE; PHOTO-EXCITED RHODOPSIN; BETA-GAMMA-SUBUNITS; OUTER SEGMENTS; PHOTOEXCITED RHODOPSIN; 48-KDA PROTEIN; PINEAL-GLAND; CYCLIC-GMP; LIGHT; BINDING AB Phosducin (Pd) is a widely expressed phosphoprotein that regulates G-protein (G) signaling, Unphosphorylated Pd binds to G beta gamma subunits and blocks their interaction with G alpha, This binding sequesters G beta gamma and inhibits both receptor-mediated activation of G alpha and direct interactions between G beta gamma and effector enzymes. When phosphorylated by cAMP-dependent protein kinase, Pd does not affect these functions of G beta gamma. To further understand the role of Pd in regulating G-protein signaling in retinal rod photoreceptor cells, we have measured the abundance of Pd in rods and examined factors that control the rate of Pd phosphorylation, Pd is expressed at a copy number comparable to that for the rod G-protein, transducin (G(t)). The ratio of rhodopsin (Rho) to Pd is 15.5 +/- 3.5 to 1, The rate of Pd phosphorylation in rod outer segment preparations was dependent on [cAMP]. K-1/2 for cAMP was 0.56 +/- 0.09 mu M, and the maximal rate of phosphorylation was similar to 500 pmol PO4 incorporated/min/nmol Rho, In the presence of G(t) beta gamma this rate was decreased similar to 50-fold. From these data, one can estimate a t(1/2) of similar to 3 min for the rephosphorylation of Pd in rods during the recovery period after a light response. This relatively slow rephosphorylation of the Pd . G(t) beta gamma complex may provide a period of molecular memory in which sensitivity to further light stimuli is reduced as a result of sequestration of G(t) beta gamma by Pd. C1 LOS ALAMOS NATL LAB,DIV PHYS,BIOPHYS GRP,LOS ALAMOS,NM 87545. RI Wilkins, Jon/A-4984-2009 OI Wilkins, Jon/0000-0001-6405-6538 FU NEI NIH HHS [EY 06816] NR 41 TC 41 Z9 42 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 9 PY 1996 VL 271 IS 32 BP 19232 EP 19237 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VB684 UT WOS:A1996VB68400037 PM 8702603 ER PT J AU Fornstedt, T Zhong, GM Guiochon, G AF Fornstedt, T Zhong, GM Guiochon, G TI Peak tailing and mass transfer kinetics in linear chromatography SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE peak tailing; mass transfer; kinetic studies; band profiles; adsorption isotherms; thermodynamic parameters ID NONLINEAR CHROMATOGRAPHY; STATIONARY PHASE; SYSTEM PEAKS; ADSORPTION; SILICA; ENANTIOMERS; SEPARATION; PACKINGS; PROFILES AB The origin of peak tailing under linear conditions, at very low analyte concentrations, is investigated using the equations of the transport-dispersive model of chromatography. It is shown that a general explanation can be obtained by assuming the existence of two different types of adsorption sites having different equilibrium isotherms and different rates of mass transfer kinetics. Even if the experimental conditions are such that both mechanisms operate linearly, tailing can be observed if the mass transfer kinetics is much slower on one type of sites than on the other, The most pronounced and typical peak tailings occur when the slow type of adsorption sites give a smaller contribution to the retention than the fast type and if the rate constant of mass transfer for the slow sites is between 20 and 2000 times smaller than that of the fast sites. Axial dispersion (caused by molecular and eddy diffusion) dampens the effects, Therefore, peak tailing of kinetic origin will be more important on highly efficient columns than on mediocre ones, An important case in point is that of enantiomeric separations. Chiral phases are designed as two-types-of-sites phases since it is impossible to eliminate the general cion-selective interactions between analytes and bonded groups, The chiral selective sites involve strong interactions between the stationary phase and at least one of the enantiomers, conditions which slow down mass transfers. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. OI Fornstedt, Torgny/0000-0002-7123-2066 NR 21 TC 88 Z9 89 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 9 PY 1996 VL 741 IS 1 BP 1 EP 12 DI 10.1016/0021-9673(96)00152-5 PG 12 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA VE271 UT WOS:A1996VE27100001 ER PT J AU Chang, BC Sears, TJ AF Chang, BC Sears, TJ TI High resolution near-infrared electronic spectroscopy of HCBr SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LASER EXCITATION SPECTROSCOPY; HCCL; CH2; TRANSITION; SPECTRUM; HCF AB The rotationally resolved spectrum of the HCBr (A) over tilde(1)A ''(0,2,0)<--(X) over tilde(1)A'(0,0,0) K-a = 0<--1 transition between 12760 and 12850 cm-l was obtained for the first time at Doppler-limited resolution using a transient frequency-modulation absorption technique. Rotational structure of HC Br-79 and HC Br-81 was identified and analyzed. The analysis shows R ''(C-Br)=1.85(2) Angstrom and R'(C-Br)=1.74(9) Angstrom. The observed band indicates a linear-bent transition. This yields an upper limit of approximately 1600 cm(-1) for the barrier to linearity above the zero-point energy for the (A) over tilde(1)A '' state. Perturbations caused by singlet-triplet interactions were also found in the observed spectrum. The analysis of these perturbations indicates a very low-lying (a) over tilde(3)A '' state. (C) 1996 American Institute of Physics. RP Chang, BC (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Sears, Trevor/B-5990-2013 OI Sears, Trevor/0000-0002-5559-0154 NR 21 TC 43 Z9 43 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 1996 VL 105 IS 6 BP 2135 EP 2140 DI 10.1063/1.472086 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VA913 UT WOS:A1996VA91300001 ER PT J AU Fulton, JL Pfund, DM Wallen, SL Newville, M Stern, EA Ma, YJ AF Fulton, JL Pfund, DM Wallen, SL Newville, M Stern, EA Ma, YJ TI Rubidium ion hydration in ambient and supercritical water SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ABSORPTION FINE-STRUCTURE; AQUEOUS-SOLUTIONS; DIELECTRIC-CONSTANT; COMPUTER-SIMULATION; ASSOCIATION; CHEMISTRY; HYDROGEN; CLUSTERS; EXAFS AB X-ray absorption fine structure (XAFS) measurements and analyses are presented for Rb+ in supercritical water solutions. The structure of the first hydration shell at ambient conditions is compared to that in the supercritical region at a temperature of 424 degrees C and pressures from 382 to 633 bar. For al reported studies, RbBr at a concentration of 0.5 molal was used. XAFS results show that there is a well-defined hydration shell around the cation even at 424 degrees C but at these high temperatures the extent of hydration of the Rb cation is reduced by about 40%. A slight contraction of this first shell distance by about 0.10 Angstrom is also observed under supercritical conditions. The reduction in the number of water-ion bonds is analogous to the reduction in the amount of water-water hydrogen bonding that has been observed by others under supercritical conditions. The reduction in waters-of-hydration under supercritical conditions may also be in part due to formation of contact-ion pairs. (C) 1996 American Institute of Physics. C1 UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA. RP Fulton, JL (reprint author), PACIFIC NW LAB, DEPT CHEM & MAT SCI, POB 999, RICHLAND, WA 99352 USA. NR 38 TC 110 Z9 111 U1 1 U2 17 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 1996 VL 105 IS 6 BP 2161 EP 2166 DI 10.1063/1.472089 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VA913 UT WOS:A1996VA91300004 ER PT J AU Reese, SK Tucker, SC AF Reese, SK Tucker, SC TI Solvent-solute reaction path curvature effects on energy transfer corrections to the solute reaction rate SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ACTIVATED RATE-PROCESSES; TRANSITION-STATE-THEORY; DISSIPATIVE SYSTEMS; FLUX METHOD; NONEQUILIBRIUM SOLVATION; CHEMICAL-REACTIONS; DIFFUSION REGIME; SPECTRAL PROFILE; TURNOVER PROBLEM; METASTABLE WELL AB We present a new rate theory which accounts for anharmonicities (nonlinearities) in the solute potential (force) over the complete range of solvent damping. The theory is based on a new method for calculating energy diffusion rates which incorporates anharmonicity-induced solvent-solute reaction path curvature and is thus valid throughout the intermediate to large damping regimes. This energy diffusion factor is combined with the microcanonical variational transition state theory spatial diffusion correction factor. The new theory is applied to the case of a cubic solute potential coupled to a long time scale bath and shown to be significantly more reliable than the turnover theory of Pollak, Grabert, and Hanggi [J. Chem. Phys. 91, 4073 (1989)] in the Kramers turnover regime. (C) 1996 American Institute of Physics. RP Reese, SK (reprint author), LAWRENCE LIVERMORE NATL LAB, DEPT CHEM, DAVIS, CA 95616 USA. NR 51 TC 10 Z9 10 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 8 PY 1996 VL 105 IS 6 BP 2263 EP 2279 DI 10.1063/1.472095 PG 17 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VA913 UT WOS:A1996VA91300014 ER PT J AU Baranyai, A Cummings, PT AF Baranyai, A Cummings, PT TI Towards the atomistic simulation of phase coexistence in nonequilibrium systems SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VARIATIONAL PRINCIPLE; MOLECULAR-DYNAMICS; GAUSSIAN THERMOSTAT; SPACE COMPRESSION; GIBBS ENSEMBLE; STEADY-STATES; HEAT-FLOW; EQUILIBRIUM; SHEAR; ENTROPY AB A theoretical approach is presented which represents the first attempt known to the authors to develop molecular dynamics algorithms capable of modeling phase coexistence between two nonequilibrium steady state phases confined in a closed (E, V, N) system. We deal exclusively with shearing liquids because of their importance in rheology. In the present paper, as in the equilibrium Gibbs ensemble Monte Carlo technique for systems at equilibrium, the coexisting phases have no physical contact but their dynamics are coupled in order to reach mechanical, thermal, and composition balance between bulk regions of the two phases. The thermal balance is maintained by requiring zero net heat flow across a hypothetical boundary. This can be achieved by starting from equilibrium and gradually increasing the strength of the external field (the shear rate) in a quasistatic process. For particle interchanges we invoke the Evans-Baranyai variational principle which is at the very least a good approximation for similar simulated steady state systems far from equilibrium. Results of several model calculations are presented. The Limitations and the implications of the methods are discussed. (C) 1996 American Institute of Physics. C1 OAK RIDGE NATL LAB, DIV CHEM TECHNOL, OAK RIDGE, TN 37831 USA. EOTVOS LORAND UNIV, LAB THEORET CHEM LAB, H-1518 BUDAPEST, HUNGARY. RP UNIV TENNESSEE, DEPT CHEM ENGN, 419 DOUGHERTY ENGN BLDG, KNOXVILLE, TN 37996 USA. RI Cummings, Peter/B-8762-2013 OI Cummings, Peter/0000-0002-9766-2216 NR 33 TC 7 Z9 7 U1 0 U2 3 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 AUG 8 PY 1996 VL 105 IS 6 BP 2378 EP 2390 DI 10.1063/1.472105 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA VA913 UT WOS:A1996VA91300026 ER PT J AU Green, JBD McDermott, MT Porter, MD AF Green, JBD McDermott, MT Porter, MD TI Real time monitoring of the electrochemical transformation of a ferrocene-terminated alkanethiolate monolayer at gold via an adhesion-based atomic force microscopic characterization SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID SELF-ASSEMBLED MONOLAYERS; SURFACE FORCES; FILMS; FRICTION; SCALE; AFM AB This paper demonstrates the real lime monitoring of the electrochemical transformation of a surface-bound redox species using AFM-based adhesion measurements, The measurements were conducted using a monolayer formed by the chemisorption of 11-mercaptoundecyl ferrocenecarboxylate (FcT) at a Au(111) electrode and a gold-coated probe tip modified with an octadecanethiolate (OT) monolayer. Using this probe tip-sample combination, the one-electron oxidation of the ferrocenyl group of the FcT monolayer results in a decrease in the observed force of adhesion (F-ad) at the microcontact formed by the two different surfaces. Using surface tension arguments, this change is attributed to the decrease in the effective miscibility at the microcontact as a consequence of the oxidation of the ferrocenyl group to the ferrocenium ion. Issues related to the underlying changes in the interfacial structure that give rise to the differences in F-ad are discussed. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,MICROANA INST CTR,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. OI McDermott, Mark/0000-0001-8372-0158 NR 34 TC 47 Z9 47 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 8 PY 1996 VL 100 IS 32 BP 13342 EP 13345 DI 10.1021/jp9610527 PG 4 WC Chemistry, Physical SC Chemistry GA VB315 UT WOS:A1996VB31500005 ER PT J AU Palmer, BJ Pfund, DM Fulton, JL AF Palmer, BJ Pfund, DM Fulton, JL TI Direct modeling of EXAFS spectra from molecular dynamics simulations SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID X-RAY-ABSORPTION; MULTIPLE-SCATTERING CALCULATIONS; FINE-STRUCTURE; SUPERCRITICAL WATER; AQUEOUS-SOLUTIONS; ION; FORMULATION; TEMPERATURE; CONSTANT; XAFS AB A method for generating extended X-ray absorption fine-structure (EXAFS) spectra directly from molecular dynamics trajectories is described. Conventional molecular dynamics trajectories are run, and configurations from the trajectory are saved at periodic intervals. Clusters containing the EXAFS atom at the center are extracted from the configurations and used as input to the multiple scattering code FEFF6, which produces an EXAFS spectrum for each cluster. The separate spectra for the individual clusters are then averaged together to get a configurationally averaged EXAFS spectrum that can be compared directly with experiment. The method is tested on strontium chloride solutions and compared with recent experimental results on strontium nitrate solutions at both standard and supercritical conditions. RP Palmer, BJ (reprint author), PACIFIC NW LAB, ENERGY & ENVIRONM SCI DIV, POB 999, RICHLAND, WA 99352 USA. NR 23 TC 94 Z9 94 U1 2 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 8 PY 1996 VL 100 IS 32 BP 13393 EP 13398 DI 10.1021/jp960160q PG 6 WC Chemistry, Physical SC Chemistry GA VB315 UT WOS:A1996VB31500012 ER PT J AU Fairbrother, DH Johnston, H Somorjai, G AF Fairbrother, DH Johnston, H Somorjai, G TI Electron spectroscopy studies of the surface composition in the H2SO4/H2O binary system SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID AQUEOUS SULFURIC-ACID; LOW-TEMPERATURES; WATER; PRESSURES; VAPOR AB The surface composition of the H2SO4/H2O binary system in the temperature range (298-170 K) has been studied using differentially pumped Auger electron and X-ray photoelectron spectrometers designed to perform under equilibrium conditions (P-H2O approximate to 10(-6)-10(-4) Torr). Both spectroscopies have been calibrated on pure sulfuric acid solutions to illustrate their ability to provide accurate atomic stoichiometries within the nearsurface region. In the case of AES this ability has also been extended as a tool for the study of the surface composition in the H2SO4/H2O binary system under equilibrium conditions. Compositional analysis of this acidified surface indicates that under these experimental conditions the chemical compositions of the bulk and near-surface region are equal within,experimental error. Mass spectrometric analysis of the vapor composition indicates equilibration between the acid solution and D2O. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 20 TC 33 Z9 33 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 8 PY 1996 VL 100 IS 32 BP 13696 EP 13700 DI 10.1021/jp960246j PG 5 WC Chemistry, Physical SC Chemistry GA VB315 UT WOS:A1996VB31500053 ER PT J AU Busch, DB Zdzienicka, MZ Natarajan, AT Jones, NJ Overkamp, WJI Collins, A Mitchell, DL Stefanini, M Botta, E Albert, RB Liu, N White, DA vanGool, AJ Thompson, LH AF Busch, DB Zdzienicka, MZ Natarajan, AT Jones, NJ Overkamp, WJI Collins, A Mitchell, DL Stefanini, M Botta, E Albert, RB Liu, N White, DA vanGool, AJ Thompson, LH TI A CHO mutant, UV40, that is sensitive to diverse mutagens and represents a new complementation group of mitomycin C sensitivity SO MUTATION RESEARCH-DNA REPAIR LA English DT Article DE DNA repair; Fanconi's anemia; mitomycin C; mutants; rodent; ultraviolet light ID CROSS-LINKING AGENTS; HAMSTER OVARY CELLS; CYCLOBUTANE PYRIMIDINE DIMERS; SISTER-CHROMATID-EXCHANGE; DNA-REPAIR; XERODERMA-PIGMENTOSUM; IONIZING-RADIATION; CHROMOSOMAL INSTABILITY; ATAXIA-TELANGIECTASIA; COCKAYNES-SYNDROME AB A new mitomycin C (MMC)-sensitive rodent line, UV40, has been identified in the collection of ultraviolet light-(UV-) sensitive mutants of Chinese hamster ovary (CHO) cells isolated at the previous Facility for Automated Experiments in Cell Biology (FAECB). It was isolated from an UV mutant hunt using mutagenesis of AA8 cells with the DNA intercalating frameshift mutagen ICR170. It is complemented by CHO-UV-1, irs1, irs3, irs1SF, MC5, V-C8 and V-H4 with respect to its MMC sensitivity based on cell survival. Despite having approx, 4 x normal UV sensitivity and increased sensitivity to UV inhibition of DNA replication, it has near-normal incision kinetics of UV irradiated DNA, and normal (6-4) photoproducts removal. It also is not hypermutable by UV, and shows near normal levels of UV inhibition of RNA synthesis. UV40 also has approx, 11X, 10x, 5x and 2x AA8 sensitivity to MMC, ethyl methanesulfonate (EMS), methyl methanesulfonate (MMS), and X-rays, respectively. Thus, its defect apparently does not involve nucleotide excision repair but rather another process, possibly in replicating past lesions. The spontaneous chromosomal aberration frequency is elevated to 20% in UV40, and the baseline frequency of sister chromatid exchange is also similar to 4-fold increased. The phenotype of UV40 appears to differ from all other rodent mutants that have so far been described. C1 LEIDEN UNIV,DEPT GENET RADIAT GENET & CHEM MUTAGENESIS,NL-2300 RA LEIDEN,NETHERLANDS. LEIDEN UNIV,JA COHEN INST,NL-2300 RA LEIDEN,NETHERLANDS. UNIV LIVERPOOL,SCH LIFE SCI,DONNAN LABS,DEPT GENET & MICROBIOL,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. ROWETT RES INST,BUCKSBURN AB2 9SB,ABERDEEN,SCOTLAND. UNIV ABERDEEN,BOYD ORR RES CTR,BUCKSBURN AB2 9SB,ABERDEEN,SCOTLAND. UNIV TEXAS,MD ANDERSON CANC CTR,DIV SCI PK RES,SMITHVILLE,TX 78957. CNR,IST GENET BIOCHIM & EVOLUZIONIST,I-27100 PAVIA,ITALY. LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. ERASMUS UNIV ROTTERDAM,DEPT CELL BIOL & GENET,NL-3000 DR ROTTERDAM,NETHERLANDS. RP Busch, DB (reprint author), ARMED FORCES INST PATHOL,WASHINGTON,DC 20306, USA. RI van Gool, Alain/G-3806-2010; Jones, Nigel/D-1997-2010; Botta, Elena/B-9065-2015; Gool, A.J./L-4328-2015 FU NCI NIH HHS [CA04484]; NCRR NIH HHS [RR00961]; NIGMS NIH HHS [GM22021] NR 53 TC 27 Z9 27 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8777 J9 MUTAT RES-DNA REPAIR JI Mutat. Res.-DNA Repair PD AUG 8 PY 1996 VL 363 IS 3 BP 209 EP 221 DI 10.1016/0921-8777(96)00014-6 PG 13 WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology GA VD354 UT WOS:A1996VD35400007 PM 8765162 ER PT J AU Cheng, BL Epstein, RI Guyer, RA Young, AC AF Cheng, BL Epstein, RI Guyer, RA Young, AC TI Earthquake-like behaviour of soft gamma-ray repeaters SO NATURE LA English DT Article ID MAGNETIZED NEUTRON-STARS; HIGH-ENERGY TRANSIENT; RECURRENCE INTERVAL; BURSTS; PULSAR; IDENTIFICATION; SGR1806-20 AB NEUTRON stars are believed to have solid crusts, which may exhibit tectonic activity analogous to earthquakes on Earth. These 'starquakes' have been invoked to explain several phenomena associated with neutron stars, such as the flashes of low-energy gamma-rays from soft gamma-ray repeaters(1,2) (SGRs), and abrupt changes ('glitches') observed in the spin periods of some pulsars(3,4). Here we show that SGR events and earthquakes share four distinctive statistical properties: power-law energy distributions, log-symmetric waiting time distributions, strong positive correlations between waiting times of successive events, and weak or no correlations between intensities and waiting times. These statistical similarities, together with the fact that the crustal energy liberated by starquakes is sufficient in principle to fuel the soft gamma-ray flashes, suggest that SGRs are indeed powered by starquakes. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV MASSACHUSETTS,DEPT PHYS & ASTRON,AMHERST,MA 01003. NR 31 TC 70 Z9 71 U1 0 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD AUG 8 PY 1996 VL 382 IS 6591 BP 518 EP 520 DI 10.1038/382518a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VB258 UT WOS:A1996VB25800042 ER PT J AU Carrigan, CR Heinle, RA Hudson, GB Nitao, JJ Zucca, JJ AF Carrigan, CR Heinle, RA Hudson, GB Nitao, JJ Zucca, JJ TI Trace gas emissions on geological faults as indicators of underground nuclear testing SO NATURE LA English DT Article ID COMPREHENSIVE TEST BAN AB UNDERGROUND nuclear explosions produce trace amounts of distinctive but ephemeral radionuclide gases. In the context of monitoring a comprehensive test ban treaty, the detection of these gases within the territory of a signatory, during a challenge inspection(1-5), may indicate the occurrence of a clandestine nuclear event. Here we report the results of an experiment simulating a well-contained underground nuclear explosion, undertaken to test the ability of natural gas-transport professes to move highly dilute and rapidly decaying radionuclides to the surface. We find that trace gases are transported to the surface within periods of weeks to a year, by how along faults and fractures driven by barometric pressure variations. Both our observations and related simulations exhibit a chromatographic behaviour, with gases of higher atomic mass and lower diffusivity reaching the surface more rapidly. For a 1-kilotonne nuclear test under conditions identical to those of our experiment, we predict that short-lived Xe-133 and Ar-37 would be detectable, respectively, about 50 and 80 days after the detonation. Our results indicate that radionuclide sampling along natural faults and fractures, as a forensic tool, can be an extremely sensitive way to detect nearby underground nuclear explosions that do not fracture the surface. C1 LAWRENCE LIVERMORE NATL LAB,ISOTOPE SCI DIV L231,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,GEOPHYS & GLOBAL SECUR DEPT L205,LIVERMORE,CA 94550. RP Carrigan, CR (reprint author), LAWRENCE LIVERMORE NATL LAB,GEOSCI & ENVIRONM TECHNOL DEPT L206,POB 808,LIVERMORE,CA 94550, USA. NR 15 TC 59 Z9 64 U1 1 U2 12 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD AUG 8 PY 1996 VL 382 IS 6591 BP 528 EP 531 DI 10.1038/382528a0 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VB258 UT WOS:A1996VB25800046 ER PT J AU Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Butler, JN Cihangir, S Gaines, I Garbincius, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Bianco, S Fabbri, FL Sarwar, S Zallo, A Culbertson, R Gardner, RW Greene, R Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Torretta, D Buchholz, D Claes, D Gobbi, B OReilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Castoldi, C Gianini, G Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, A Grim, GP Paolone, VS Yager, PM Wilson, JR Sheldon, PD Davenport, F Blackett, GR Danyo, K Pisharody, M Handler, T Cheon, BG Kang, JS Kim, KY AF Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Butler, JN Cihangir, S Gaines, I Garbincius, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Bianco, S Fabbri, FL Sarwar, S Zallo, A Culbertson, R Gardner, RW Greene, R Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Torretta, D Buchholz, D Claes, D Gobbi, B OReilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Castoldi, C Gianini, G Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, A Grim, GP Paolone, VS Yager, PM Wilson, JR Sheldon, PD Davenport, F Blackett, GR Danyo, K Pisharody, M Handler, T Cheon, BG Kang, JS Kim, KY TI Analysis of the Cabibbo suppressed decay D-0->pi(-)l(+)nu SO PHYSICS LETTERS B LA English DT Article ID SEMILEPTONIC DECAYS; RADIATIVE-CORRECTIONS; BRANCHING FRACTIONS; QUARK-MODEL; D-MESONS AB Results for the Cabibbo suppressed semileptonic decays D-0 --> pi(-)mu(+)nu and D-0 --> pi(-)mu(+)nu (charge conjugates are implied) are reported by Fermilab photoproduction experiment E687. We find 45.4 +/- 13.3 events in the electron mode and 45.6 +/- 11.8 in the muon mode. The relative branching ratio BR(D-0 --> pi(-)/(+)nu)/BR(D-0 --> K-/(+)nu) for the combined sample is measured to be 0.101 +/- 0.020 (stat.) +/- 0.003 (syst.)(14). C1 IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. UNIV COLORADO,BOULDER,CO 80309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV ILLINOIS,URBANA,IL 61801. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY. IST NAZL FIS NUCL,I-27100 PAVIA,ITALY. UNIV PUERTO RICO,MAYAGUEZ,PR. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV S CAROLINA,COLUMBIA,SC 29208. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV N CAROLINA,ASHEVILLE,NC 28804. UNIV TENNESSEE,KNOXVILLE,TN 37996. KOREA UNIV,SEOUL 136701,SOUTH KOREA. RP Frabetti, PL (reprint author), UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. NR 23 TC 18 Z9 18 U1 0 U2 2 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 AUG 8 PY 1996 VL 382 IS 3 BP 312 EP 322 DI 10.1016/0370-2693(96)00799-X PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VB592 UT WOS:A1996VB59200018 ER PT J AU Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC Berggren, M Bertini, D Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, M Charpentier, P Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Durand, JD Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK JOnsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Libby, J Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Lukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Normand, A Novak, M OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Serbelloni, L Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tcherniaev, E Tchikilev, O Thomas, J Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G AF Abreu, P Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, GD Alemany, R Allport, PP Almehed, S Amaldi, U Amato, S Andreazza, A Andrieux, ML Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Barbi, M Bardin, DY Baroncelli, A Barring, O Barrio, JA Bartl, W Bates, MJ Battaglia, M Baubillier, M Baudot, J Becks, KH Begalli, M Beilliere, P Belokopytov, Y Belous, K Benvenuti, AC Berggren, M Bertini, D Bertrand, D Bianchi, F Bigi, M Bilenky, MS Billoir, P Bloch, D Blume, M Bolognese, T Bonesini, M Bonivento, W Booth, PSL Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Bozzo, M Branchini, P Brand, KD Brenke, T Brenner, RA Bricman, C Brown, RCA Bruckman, P Brunet, JM Bugge, L Buran, T Burgsmueller, T Buschmann, P Buys, A Cabrera, S Caccia, M Calvi, M Rozas, AJC Camporesi, T Canale, V Canepa, M Cankocak, K Cao, F Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Chapkin, M Charpentier, P Chaussard, L Checchia, P Chelkov, GA Chen, M Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Cindro, V Collins, P Contreras, JL Contri, R Cortina, E Cosme, G Cossutti, F Crawley, HB Crennell, D Crosetti, G Maestro, JC Czellar, S DahlJensen, E Dahm, J Dalmagne, B Dam, M Damgaard, G Dauncey, PD Davenport, M DaSilva, W Defoix, C Deghorain, A DellaRicca, G Delpierre, P Demaria, N DeAngelis, A DeBoer, W DeBrabandere, S DeClercq, C DeLaVaissiere, C DeLotto, B DeMin, A DePaula, L DeSaintJean, C Dijkstra, H DiCiaccio, L Djama, F Dolbeau, J Donszelmann, M Doroba, K Dracos, M Drees, J Drees, KA Dris, M Durand, JD Edsall, D Ehret, R Eigen, G Ekelof, T Ekspong, G Elsing, M Engel, JP Erzen, B Santo, ME Falk, E Fassouliotis, D Feindt, M Ferrer, A Fichet, S Filippas, TA Firestone, A Fischer, PA Foeth, H Fokitis, E Fontanelli, F Formenti, F Franek, B Frenkiel, P Fries, DC Frodesen, AG Fruhwirth, R FuldaQuenzer, F Fuster, J Galloni, A Gamba, D Gandelman, M Garcia, C Garcia, J Gaspar, C Gasparini, U Gavillet, P Gazis, EN Gele, D Gerber, JP Gibbs, M Gokieli, R Golob, B Gopal, G Gorn, L Gorski, M Gouz, Y Gracco, V Graziani, E Grosdidier, G Grzelak, K Gumenyuk, S Gunnarsson, P Gunther, M Guy, J Hahn, F Hahn, S Hajduk, Z Hallgren, A Hamacher, K Hao, W Harris, FJ Hedberg, V Henriques, R Hernandez, JJ Herquet, P Herr, H Hessing, TL Higon, E Hilke, HJ Hill, TS Holmgren, SO Holt, PJ Holthuizen, D Hoorelbeke, S Houlden, M Hrubec, J Huet, K Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P JeanMarie, B Johansson, EK JOnsson, L Jonsson, P Joram, C Juillot, P Kaiser, M Kapusta, F Karafasoulis, K Karlsson, M Karvelas, E Katsanevas, S Katsoufis, EC Keranen, R Khokhlov, Y Khomenko, BA Khovanski, NN King, B Kjaer, NJ Klein, H Klovning, A Kluit, P Koene, B Kokkinias, P Koratzinos, M Korcyl, K Kostioukhine, V Kourkoumelis, C Kouznetsov, O Kramer, PH Krammer, M Kreuter, C Kronkvist, I Krumstein, Z Krupinski, W Kubinec, P Kucewicz, W Kurvinen, K Lacasta, C Laktineh, I Lamsa, JW Lanceri, L Lane, DW Langefeld, P Lapin, V Last, I Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Legan, CK Leitner, R Lemoigne, Y Lemonne, J Lenzen, G Lepeltier, V Lesiak, T Libby, J Lindner, R Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopez, JM Lukas, D Lutz, P Lyons, L MacNaughton, J Maehlum, G Maio, A Malmgren, TGM Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Maron, T MartinezRivero, C MartinezVidal, F Garcia, SMI Matorras, F Matteuzzi, C Matthiae, G Mazzucato, M McCubbin, M McKay, R McNulty, R Medbo, J Merk, M Meroni, C Meyer, S Meyer, WT Michelotto, M Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moeller, R Moenig, K Monge, MR Morettini, P Mueller, H Mundim, LM Murray, WJ Muryn, B Myatt, G Naraghi, F Navarria, FL Navas, S Nawrocki, K Negri, P Nemecek, S Neumann, W Neumeister, N Nicolaidou, R Normand, A Novak, M OberschulteBeckmann, W Obraztsov, V Olshevski, AG Onofre, A Orava, R Osterberg, K Ouraou, A Paganini, P Paganoni, M Pages, P Pain, R Palka, H Papadopoulou, TD Papageorgiou, K Pape, L Parkes, C Parodi, F Passeri, A Pegoraro, M Peralta, L Pernegger, H Pernicka, M Perrotta, A Petridou, C Petrolini, A Petrovyck, M Phillips, HT Piana, G Pierre, F Pimenta, M Plaszczynski, S Podobrin, O Pol, ME Polok, G Poropat, P Pozdniakov, V Prest, M Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Reale, M Rebecchi, P Redaelli, NG Regler, M Reid, D Renton, PB Resvanis, LK Richard, F Richardson, J Ridky, J Rinaudo, G Ripp, I Romero, A Roncagliolo, I Ronchese, P Roos, L Rosenberg, EI Rosso, E Roudeau, P Rovelli, T Ruckstuhl, W RuhlmannKleider, V Ruiz, A Rybicki, K Saarikko, H Sacquin, Y Sadovsky, A Sahr, O Sajot, G Salt, J Sanchez, J Sannino, M Schimmelpfennig, M Schneider, H Schwickerath, U Schyns, MAE Sciolla, G Scuri, F Seager, P Sedykh, Y Segar, AM Seitz, A Sekulin, R Serbelloni, L Shellard, RC Siccama, I Siegrist, P Simonetti, S Simonetto, F Sisakian, AN Sitar, B Skaali, TB Smadja, G Smirnov, N Smirnova, O Smith, GR Sosnowski, R SouzaSantos, D Spassov, T Spiriti, E Sponholz, P Squarcia, S Stanescu, C Stapnes, S Stavitski, I Stevenson, K Stichelbaut, F Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Tavernet, JP Tcherniaev, E Tchikilev, O Thomas, J Tilquin, A Timmermans, J Tkatchev, LG Todorov, T Todorova, S Toet, DZ Tomaradze, A Tonazzo, A Tortora, L Transtromer, G Treille, D Trischuk, W Tristram, G Trombini, A Troncon, C Tsirou, A Turluer, ML Tyapkin, IA Tyndel, M Tzamarias, S Ueberschaer, B Ullaland, O Uvarov, V Valenti, G Vallazza, E VanderVelde, C VanApeldoorn, GW VanDam, P VanEldik, J Vassilopoulos, N Vegni, G Ventura, L Venus, W Verbeure, F Verlato, M Vertogradov, LS Vilanova, D Vincent, P Vitale, L Vlasov, E Vodopyanov, AS Vrba, V Wahlen, H Walck, C Waldner, F Weierstall, M Weilhammer, P Weiser, C Wetherell, AM Wicke, D Wickens, JH Wielers, M Wilkinson, GR Williams, WSC Winter, M Witek, M Woschnagg, K Yip, K Yushchenko, O Zach, F Zaitsev, A Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zito, M Zontar, D Zucchelli, GC Zumerle, G TI Search for the lightest chargino at root s=130 and 136 GeV SO PHYSICS LETTERS B LA English DT Article ID STANDARD MODEL; SUPERSYMMETRY; PHYSICS; LEP-200 AB A search for pair production of the lightest chargino at root-s = 130.4 and 136.3 GeV has been carried out using the data sample corresponding to the 5.92 pb(-1) recorded by the DELPHI detector during the high energy run of LEP in the last period of 1995. The theoretical reference model has been the Minimal Supersymmetric Standard Model with R-parity conservation. The three topologies expected for the decay of a pair of charginos, namely two acoplanar leptons plus missing energy (ll), two jets and an isolated lepton plus missing (jjl) and missing energy in a hadronic environment (root-s), were investigated. No evidence of a signal was found. Lower mass limits were derived for various scenarios, including the case of a low mass difference between the chargino and the neutralino and of a light sneutrino. The mass limits range between 56.3 GeV/c(2) and the kinetic limit. C1 UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND. UNIV PARIS 06, CNRS, IN2P3, F-75252 PARIS 05, FRANCE. UNIV PARIS 07, CNRS, IN2P3, F-75252 PARIS 05, FRANCE. LUND UNIV, DEPT PHYS, S-22363 LUND, SWEDEN. UNIV LYON 1, IPNL, IN2P3, CNRS, F-69622 VILLEURBANNE, FRANCE. UNIV COMPLUTENSE, E-28040 MADRID, SPAIN. UNIV AIX MARSEILLE 2, CPP, IN2P3, CNRS, F-13288 MARSEILLE 09, FRANCE. UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. NIELS BOHR INST, DK-2100 COPENHAGEN O, DENMARK. CHARLES UNIV, MFF, NC, NUCL CTR, CR-18000 PRAGUE 8, CZECH REPUBLIC. NIKHEF H, NL-1009 DB AMSTERDAM, NETHERLANDS. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV OVIEDO, DEPT FIS, OVIEDO 33006, SPAIN. UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY. IST NAZL FIS NUCL, I-35131 PADUA, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV ROMA TOR VERGATA, DIPARTIMENTO FIS, I-00173 ROME, ITALY. IST NAZL FIS NUCL, I-00173 ROME, ITALY. CENS, DAPNIA, SERV PHYS PARTICULES, CEA, F-91191 GIF SUR YVETTE, FRANCE. IST SUPER SANITA, IST NAZL FIS NUCL, I-00161 ROME, ITALY. CSIC, INST FIS CANTABRIA, CICYT, SANTANDER 39006, SPAIN. INST HIGH ENERGY PHYS, PROTVINO, RUSSIA. UNIV LJUBLJANA, JOZEF STEFAN INST, SL-61000 LJUBLJANA, SLOVENIA. UNIV LJUBLJANA, DEPT PHYS, SL-61000 LJUBLJANA, SLOVENIA. UNIV STOCKHOLM, FYSIKUM, S-11385 STOCKHOLM, SWEDEN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY. IST NAZL FIS NUCL, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. UNIV FED RIO DE JANEIRO, BR-21945970 RIO DE JANEIRO, BRAZIL. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, VALENCIA, SPAIN. CSIC, IFIC, E-46100 BURJASSOT, VALENCIA, SPAIN. AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WARSAW, PL-00681 WARSAW, POLAND. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, D-42097 WUPPERTAL, GERMANY. IOWA STATE UNIV, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV, DEPT PHYS, AMES, IA 50011 USA. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 Antwerp, BELGIUM. FREE UNIV Brussels, IIHE, B-1050 BRUSSELS, BELGIUM. UNIV MONS, FAC SCI, B-7000 MONS, BELGIUM. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. UNIV BOLOGNA, DIPARTMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. CTR BRASILEIRO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL. UNIV ESTADUAL RIO DE JANEIRO, INST FIS, RIO DE JANEIRO, BRAZIL. COMENIUS UNIV BRATISLAVA, FAC MATH & PHYS, SK-84215 BRATISLAVA, SLOVAKIA. COLL FRANCE, CNRS, IN2P3, PHYS CORPUSCULAIRE LAB, F-75231 PARIS 05, FRANCE. CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV STRASBOURG 1, CNRS, IN2P3, CTR RECH NUCL, F-67037 STRASBOURG, FRANCE. NATL CTR SCI RES DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. ACAD SCI CZECH REPUBL, INST PHYS, FZU, DIV HIGH ENERGY PHYS, CR-18040 PRAGUE 8, CZECH REPUBLIC. UNIV GENEVA, DEPT PHYS, GENEVA, SWITZERLAND. IST NAZL FIS NUCL, CH-16146 GENEVA, SWITZERLAND. UNIV GRENOBLE 1, INST SCI NUCL, CNRS, IN2P3, F-38026 ST MARTIN DHERES, FRANCE. SEFT, RES INST HIGH ENERGY PHYS, FIN-00014 HELSINKI, FINLAND. JOINT INST NUCL RES DUBNA, MOSCOW 101000, RUSSIA. UNIV KARLSRUHE, INST EXPTL KERNPHYS, D-76128 KARLSRUHE, GERMANY. INST NUCL PHYS, PL-30055 KRAKOW, POLAND. UNIV MIN & MET KRAKOW, PL-30055 KRAKOW, POLAND. UNIV PARIS 11, CNRS, IN2P3, LAB ACCELERATEUR LINEAIRE, F-91405 ORSAY, FRANCE. UNIV LANCASTER, SCH PHYS & CHEM, LANCASTER LA1 4YB, ENGLAND. RP Abreu, P (reprint author), INST SUPER TECN, LIP, FCUL, AV ELIAS GARCIA, 14-1O, P-1000 LISBON, PORTUGAL. RI Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Navas, Sergio/N-4649-2014; Barao, Fernando/O-2357-2016; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; Cabrera Urban, Susana/H-1376-2015; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Tcherniaev, Evgueni/G-3453-2016; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Rames, Jiri/H-2450-2014; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Michelotto, Michele/A-9571-2013; Mundim, Luiz/A-1291-2012; Yip, Kin/D-6860-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Nemecek, Stanislav/G-5931-2014; Ridky, Jan/H-6184-2014; Fernandez, Ester/K-9734-2014; Espirito Santo, Maria Catarina/L-2341-2014; Katsanevas, Stavros/A-4297-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; de Paula, Leandro/I-9278-2012; Andreazza, Attilio/E-5642-2011 OI Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Navas, Sergio/0000-0003-1688-5758; Barao, Fernando/0000-0002-8346-9941; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Tcherniaev, Evgueni/0000-0002-3685-0635; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Michelotto, Michele/0000-0001-6644-987X; Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; de Paula, Leandro/0000-0002-4984-7734; Andreazza, Attilio/0000-0001-5161-5759 NR 26 TC 26 Z9 26 U1 0 U2 6 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 AUG 8 PY 1996 VL 382 IS 3 BP 323 EP 336 DI 10.1016/0370-2693(96)00769-1 PG 14 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA VB592 UT WOS:A1996VB59200019 ER PT J AU Clark, DL Deacon, GB Feng, TC Hollis, RV Scott, BL Skelton, BW Watkin, JG White, AH AF Clark, DL Deacon, GB Feng, TC Hollis, RV Scott, BL Skelton, BW Watkin, JG White, AH TI New homoleptic anionic aryloxolanthanide(III) complexes with unusual coordination trapping of the alkali-metal counter ions SO CHEMICAL COMMUNICATIONS LA English DT Article ID THF = TETRAHYDROFURAN; X-RAY STRUCTURES; ARENE INTERACTIONS; CRYSTAL-STRUCTURES; LANTHANUM; LIGANDS; CHEMISTRY; REACTIVITY; CESIUM; CHAIN AB The complex {Cs-2[La(OAr)5]} (Ar = C6H3Pr2i-2,6), from LaCl3 or La-2(OAr)6 and CsOAr in tetrahydrofuran, has an unprecedented polymeric structure in which five-coordinate [La(OAr)(s)](2-) anions are bonded to caesium in a three- dimensional network solely by Ar-Cs pi bonds, whilst {Na[Nd(Odpp)(4)]} (dpp = C(6)H(3)Ph(2)-2,6), from NdCl3 and NaOdpp in 1,3,5-tri-tert-butylbenzene at 300 degrees C; has an unexpected monomeric structure with sodium bonded to three oxygens and encapsulated by three phenyl groups of [Nd(Odpp)(4)](-). C1 MONASH UNIV,DEPT CHEM,CLAYTON,VIC 3168,AUSTRALIA. UNIV WESTERN AUSTRALIA,DEPT CHEM,NEDLANDS,WA 6907,AUSTRALIA. RP Clark, DL (reprint author), LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,MAIL STOP G739,LOS ALAMOS,NM 87545, USA. RI Clark, David/A-9729-2011; White, Allan/K-2518-2012; Skelton, Brian/K-2532-2012; Scott, Brian/D-8995-2017; OI Scott, Brian/0000-0003-0468-5396; Deacon, Glen/0000-0002-6966-6121 NR 23 TC 24 Z9 24 U1 0 U2 3 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 1359-7345 J9 CHEM COMMUN JI Chem. Commun. PD AUG 7 PY 1996 IS 15 BP 1729 EP 1730 DI 10.1039/cc9960001729 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VA968 UT WOS:A1996VA96800008 ER PT J AU Stephenson, JL McLuckey, SA AF Stephenson, JL McLuckey, SA TI Ion/ion reactions in the gas phase: Proton transfer reactions involving multiply-charged proteins SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID IONIZATION MASS-SPECTROMETRY; ION-MOLECULE REACTIONS; INDUCED CONFORMATIONAL-CHANGES; ASSISTED LASER DESORPTION; CYTOCHROME-C IONS; ELECTROSPRAY-IONIZATION; LARGE BIOMOLECULES; TRAP; ANIONS; CHEMISTRY AB Multiply-charged cations derived from electrospray of bovine ubiquitin and horse skeletal muscle apomyoglobin have been subjected to reactions with anions derived from glow discharge ionization of perfluoro-1,3-dimethylcyclohexane. The results are compared with data obtained from proton transfer reactions with strong gaseous neutral bases. Ion/ion reaction rates are shown to be linearly related to the square of the charge on the protein ion, as expected based on a simple capture collision model. Cationic products with charge as low as +1 could be readily formed via ion/ion reactions, whereas efforts to produce such low charge states via ion/molecule reactions have proved unsuccessful. Ion/ion proton transfer reactions appear to be an effective means of reducing charge on highly charged proteins to arbitrarily low charge states. In addition to proton transfer, ion/ion recombination has also been observed. The propensity for proton transfer versus anion attachment to the cation is highly dependent upon the identity of the anion. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. RI Stephenson, James/A-9262-2009; McLuckey, Scott/B-2203-2009 OI McLuckey, Scott/0000-0002-1648-5570 NR 75 TC 148 Z9 148 U1 2 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 7 PY 1996 VL 118 IS 31 BP 7390 EP 7397 DI 10.1021/ja9611755 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA VB310 UT WOS:A1996VB31000019 ER PT J AU Radziszewski, JG Nimlos, MR Winter, PR Ellison, GB AF Radziszewski, JG Nimlos, MR Winter, PR Ellison, GB TI Infrared absorption spectroscopy of the phenyl radical SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article C1 UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309. RP Radziszewski, JG (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 14 TC 54 Z9 55 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 7 PY 1996 VL 118 IS 31 BP 7400 EP 7401 DI 10.1021/ja960617+ PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA VB310 UT WOS:A1996VB31000021 ER PT J AU Oprea, M Perelson, AS AF Oprea, M Perelson, AS TI Exploring the mechanisms of primary antibody responses to T cell-dependent antigens SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article ID SECONDARY LYMPHOID ORGANS; PRIMARY IMMUNE-RESPONSE; SPLENIC B-CELLS; GERMINAL-CENTERS; DENDRITIC CELLS; CD40 LIGAND; SOMATIC HYPERMUTATION; PROTEIN ANTIGENS; LYMPHOCYTES-T; IN-VIVO AB We have developed a model of the early events that occur during a primary antibody response to a T cell-dependent antigen. Within secondary lymphoid organs, B cell proliferation in response to antigen injection gives rise to two kinds of transient structures: foci that develop in the T cell area, and germinal centers, that develop in the secondary follicles of the B cell area. Foci give rise to plasma cells that are responsible for the majority of early circulating antibody, whereas germinal centers are sites of somatic mutation and memory cell formation. Here we model the cell-cell interactions and cell population kinetics involved in the generation of antibody-forming cell foci, and compare our model with experimental data. We focus on fundamental issues involving the control of B cell proliferation and differentiation, using simple kinetic models that depend on direct cell-cell interactions and on the action of cytokines. We show that with realistic parameter assumptions our model can account for both the rapid cellular expansion and the differentiation of B cells into antibody-secreting cells. By summing the expected antibody production of all the plasmablasts and plasma cells that are generated during the focus response we can account for much of the antibody observed in the serum of mice during a primary response. Lastly, we compare the predictions of our model for two different scenarios for the control of B cell proliferation. In one model, we assume that B cells, once activated, proliferate under the control of cytokines without direct interaction with activated T cells. In the other model, we assume that after dividing B cells return to rest and require a contact-dependent signal from an activated T cell to divide again. The first model gives rise to large foci and antibody levels similar to that observed in experiment, whereas the latter model gives rise to four-fold smaller foci and to circulating antibody levels that are one order of magnitude lower than typical experimental values. This result suggests that B cells may be able to divide without further contact with T cells once a cognate interaction has occurred. (C) 1996 Academic Press Limited. C1 SANTA FE INST,SANTA FE,NM 87501. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. FU NIAID NIH HHS [AI28433] NR 75 TC 35 Z9 36 U1 0 U2 1 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD AUG 7 PY 1996 VL 181 IS 3 BP 215 EP 236 DI 10.1006/jtbi.1996.0127 PG 22 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA VF333 UT WOS:A1996VF33300003 PM 8869124 ER PT J AU AbuOmar, MM Espenson, JH AF AbuOmar, MM Espenson, JH TI Oxidations of cyclic beta-diketones catalyzed by methylrhenium trioxide SO ORGANOMETALLICS LA English DT Article ID MAIN-GROUP ELEMENTS; BAEYER-VILLIGER OXIDATION; HYDROGEN-PEROXIDE; TRANSITION-METALS; MULTIPLE BONDS; THIANTHRENE 5-OXIDE; MECHANISTIC PROBE; OXYGEN-TRANSFER; SINGLET OXYGEN; METHYLTRIOXORHENIUM AB Methylrhenium trioxide (CH3ReO3 or MTO) catalyzes the oxidation of beta-diketones by hydrogen peroxide. The kinetics of the initial oxidation step have been investigated in CH3CN/H2O (1:1 v/v) at 25 degrees C for a group of cyclic beta-diketones. The initial oxidation step features the enol form, the majority species, as the reactant. Its rate responds to substituents in the ''normal'' manner: electron-donating groups accelerate the reaction. We suggest that the double bond of the enol attacks a peroxo oxygen of a peroxorhenium complex A CH3Re(O)(2)(O-2) or B = CH3Re(O)(O-2)(2)(H2O). This reaction affords a 2-hydroxy-1,3-dicarbonyl intermediate, which in some instances was detected by H-1 NMR. This hydroxy intermediate is susceptible to cleavage via a Baeyer-Villiger oxidation to yield carboxylic acids as final products. In contrast to the first reaction, this step may feature the peroxorhenium complexes A and B as nucleophiles rather than their customary electrophilic behavior; perhaps the trend is reversed by substrate binding to rhenium. Time profiles for the different stages of the reaction were also determined. The mechanistic aspects of these multistep catalytic oxidations are discussed in terms of the electronic nature of the activated rhenium-bound peroxo ligands. C1 IOWA STATE UNIV,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. NR 38 TC 46 Z9 46 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD AUG 6 PY 1996 VL 15 IS 16 BP 3543 EP 3549 DI 10.1021/om9603530 PG 7 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA VB921 UT WOS:A1996VB92100014 ER PT J AU Park, MS Knauf, JA Pendergrass, SH Coulon, CH Strniste, GF Marrone, BL MacInnes, MA AF Park, MS Knauf, JA Pendergrass, SH Coulon, CH Strniste, GF Marrone, BL MacInnes, MA TI Ultraviolet-induced movement of the human DNA repair protein, Xeroderma pigmentosum type G, in the nucleus SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE nucleotide excision repair; nuclear matrix; immunofluorescence; ultraviolet damage ID NUCLEOTIDE EXCISION NUCLEASE; HUMAN-CELLS; SACCHAROMYCES-CEREVISIAE; ACTIVE GENE; YEAST RAD2; TRANSCRIPTION; MATRIX; SITES; COMPLEMENTATION; VISUALIZATION AB Xeroderma pigmentosum type G (XPG) is a human genetic disease exhibiting extreme sensitivity to sunlight, XPG patients are defective XPG endonuclease, which is an enzyme essential for DNA repair of the major kinds of solar ultraviolet (UV)-induced DNA damages. Here we describe a novel dynamics of this protein within the cell nucleus after UV irradiation of human cells. Using confocal micropscopy, we have localized the immumofluorescent, antigenic signal of XPG protein to foci throughout the cell nucleus, Our biochemical studies also established that XPG protein forms a tight association with nuclear structure(s). In human skin fibroblast cells, the number of XPG foci decreased within 2 h after UV irradiation, whereas total nuclear XPG fluorescence intensity remained constant, suggesting redistribution of XPG from a limited number of nuclear foci to the nucleus overall. Within 8 h after UV, most XPG antigenic signal was found as foci, Using beta-galactosidase-XPG fusion constructs (beta-gal-XPG) transfected into HeLa cells, we have identified a single region of XPG that is evidently responsible both for foci formation and for the UV dynamic response. The fusion protein carrying the C terminus of XPG (amino acids 1146-1185) localized beta-gal specific antigenic signal to foci and to the nucleolus regions, After UV irradiation, antigenic beta-gal translocated reversibly from the subnuclear structures to the whale nucleus with kinetics very similar to the movements of XPG protein, These findings lead us to propose a model in which distribution of XPG protein may regulate the rate of DNA repair within transcriptionally active and inactive compartments of the cell nucleus. RP Park, MS (reprint author), LOS ALAMOS NATL LAB, DIV LIFE SCI, M888, LOS ALAMOS, NM 87545 USA. NR 49 TC 43 Z9 43 U1 1 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 AUG 6 PY 1996 VL 93 IS 16 BP 8368 EP 8373 DI 10.1073/pnas.93.16.8368 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VB325 UT WOS:A1996VB32500040 PM 8710877 ER PT J AU Schultz, DJ Cahoon, EB Shanklin, J Craig, R CoxFoster, DL Mumma, RO Medford, JI AF Schultz, DJ Cahoon, EB Shanklin, J Craig, R CoxFoster, DL Mumma, RO Medford, JI TI Expression of a Delta(9) 14:0-acyl carrier protein fatty acid desaturase gene is necessary for the production of omega(5) anacardic acids found in pest-resistant geranium (Pelargonium xhortorum) SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID THUNBERGIA-ALATA ENDOSPERM; TRANSGENIC TOBACCO; TRICHOME EXUDATE; FOXGLOVE APHID; BIOSYNTHESIS; PLANTS AB Anacardic acids, a class of secondary compounds derived from fatty acids, are found in a variety of dicotyledonous families. Pest resistance (e.g., spider mites and aphids) in Pelargonium xhortorum (geranium) is associated with high levels (approximate to 81%) of unsaturated 22:1 omega(5) and 24:1 omega(5) anacardic acids in the glandular trichome exudate, A single dominant locus controls the production of these omega(5) anacardic acids, which arise from novel 16:1 Delta(11) and 18:1 Delta(13) fatty acids, We describe the isolation and characterization of a cDNA encoding a unique Delta(9) 14:0-acyl carrier protein fatty acid desaturase. Several lines of evidence indicated that expression of this desaturase leads to the production of the omega(5) anacardic acids involved in pest resistance. First, its expression was found in pest-resistant, but not suspectible, plants and its expression followed the production of omega(5) anacardic acids in segregating populations, Second, its expression and the occurrence of the novel 16:1 Delta(11) and 18:1 Delta(13) fatty acids and the omega(5) anacardic acids were specific to tall glandular trichomes. Third, assays of the recombinant protein demonstrated that this desaturase produced the 14:1 Delta(9) fatty acid precursor to the novel 16:1 Delta(11) and 18:1 Delta(13) fatty acids. Based on our genetic and biochemical studies, we conclude that expression of this Delta(9) 14:0-ACP desaturase gene is required for the production of omega(5) anacardic acids that have been shown to be necessary for pest resistance in geranium. C1 PENN STATE UNIV, INTERCOLL GRAD DEGREE PROGRAM GENET, UNIVERSITY PK, PA 16802 USA. PENN STATE UNIV, DEPT HORT, UNIVERSITY PK, PA 16802 USA. PENN STATE UNIV, DEPT ENTOMOL, UNIVERSITY PK, PA 16802 USA. PENN STATE UNIV, DEPT BIOL, UNIVERSITY PK, PA 16802 USA. BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA. RI Cox-Foster, Diana/L-1538-2013 NR 26 TC 50 Z9 53 U1 0 U2 12 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 AUG 6 PY 1996 VL 93 IS 16 BP 8771 EP 8775 DI 10.1073/pnas.93.16.8771 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VB325 UT WOS:A1996VB32500112 PM 8710947 ER PT J AU Hiskes, JR AF Hiskes, JR TI Molecular Rydberg states in hydrogen negative ion discharges SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSITION-PROBABILITIES; H FORMATION; H-2; EXCITATION; ATTACHMENT AB The presence of Rydberg states in a negative-ion discharge that are generated by electron collisional excitation will increase the concentration of negative ions on the order of 1% or less, compared to the concentration generated via dissociative attachment to ground-state vibrationally excited molecules. (C) 1996 American Institute of Physics. RP Hiskes, JR (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 18 TC 33 Z9 33 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 5 PY 1996 VL 69 IS 6 BP 755 EP 757 DI 10.1063/1.117881 PG 3 WC Physics, Applied SC Physics GA VA292 UT WOS:A1996VA29200013 ER PT J AU Yu, KM Hsu, L AF Yu, KM Hsu, L TI Local structural modification in ion damaged InGaAs SO APPLIED PHYSICS LETTERS LA English DT Article ID ABSORPTION FINE-STRUCTURE; COMPOUND SEMICONDUCTORS; GAAS; IMPLANTATION; AMORPHIZATION; IRRADIATION; DEPENDENCE AB The indium nearest-neighbor environment in InGaAs thin films damaged by Ar ion implantation has been studied by extended x-ray absorption fine structure spectroscopy. We find that before the material turns amorphous by Ar irradiation, the In-As nearest-neighbor distance remains close to its crystalline value even when the layer is heavily damaged but not entirely amorphous. Once the Ar dose exceeds the threshold for amorphizing the InGaAs layer, the In-As bond distance relaxes to that of pure crystalline InAs. This sudden change in local structure as the material transforms from crystalline to amorphous suggests that the transition is due to simultaneous amorphous nucleation rather than the accumulation and overlapping of isolated amorphous regions. Moreover, this change in the local structure in a ternary alloy can be used as a criterion for determining the crystalline-to-amorphous transition of the alloy. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP Yu, KM (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV SCI MAT,BERKELEY,CA 94720, USA. RI Yu, Kin Man/J-1399-2012 OI Yu, Kin Man/0000-0003-1350-9642 NR 26 TC 6 Z9 6 U1 1 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 5 PY 1996 VL 69 IS 6 BP 824 EP 826 DI 10.1063/1.117904 PG 3 WC Physics, Applied SC Physics GA VA292 UT WOS:A1996VA29200036 ER PT J AU Rothman, JL AF Rothman, JL TI Ultra-fast monocycle generator SO ELECTRONIC DESIGN LA English DT Article RP Rothman, JL (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PENTON PUBL INC PI CLEVELAND PA 1100 SUPERIOR AVE, CLEVELAND, OH 44114 SN 0013-4872 J9 ELECTRON DES JI Electron. Des. PD AUG 5 PY 1996 VL 44 IS 16 BP 102 EP 102 PG 1 WC Engineering, Electrical & Electronic SC Engineering GA VA272 UT WOS:A1996VA27200013 ER PT J AU Steiner, M Kakurai, K Dorner, B Pynn, R Akimitsu, J AF Steiner, M Kakurai, K Dorner, B Pynn, R Akimitsu, J TI The change of the symmetry of the soft-mode spin wave at the spin-flop transition as observed in MnTiO3 using inelastic polarized neutron scattering SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID ANTIFERROMAGNET AB The energy and the eigenvector of the spin waves in MnTiO3 have been studied as functions of the applied magnetic field using inelastic neutron scattering with and without polarization analysis. It is found that the behaviour depends on the distance q from the antiferromagnetic zone centre: for q congruent to 0 the mode softens completely at the spin-flop field H-sf, but it has finite energy for q > 0; the eigenvector retains its Ising character for small q up to the highest fields measured (5 T = 0.86H(sf), assuming H-sf = 5.8 T), but it changes continuously with held from Ising to Heisenberg character for large q. A very strong, temperature-dependent line width was found at H = 6 T, close to H-sf which is interpreted as further evidence for the soft-mode instability at the spin-flop transition. C1 UNIV TOKYO,ISSP,NEUTRON SCATTERING LAB,TOKAI,IBARAKI 31911,JAPAN. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. LOS ALAMOS NATL LAB,LANSCE,LOS ALAMOS,NM. AOYAMA GAKUIN UNIV,DEPT PHYS,TOKYO 157,JAPAN. RP Steiner, M (reprint author), HAHN MEITNER INST BERLIN GMBH,GLIENICKER STR 100,D-14109 BERLIN,GERMANY. NR 13 TC 0 Z9 0 U1 0 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 5 PY 1996 VL 8 IS 32 BP 5905 EP 5914 DI 10.1088/0953-8984/8/32/010 PG 10 WC Physics, Condensed Matter SC Physics GA VB658 UT WOS:A1996VB65800010 ER PT J AU Jones, MA Urban, W Durell, JL Leddy, M Phillips, WR Smith, AG Varley, BJ Ahmad, I Morss, LR Bentaleb, M Lubkiewicz, E Schulz, N AF Jones, MA Urban, W Durell, JL Leddy, M Phillips, WR Smith, AG Varley, BJ Ahmad, I Morss, LR Bentaleb, M Lubkiewicz, E Schulz, N TI Parities and multipolarities of gamma rays in neutron-rich odd-mass Ba nuclei SO NUCLEAR PHYSICS A LA English DT Article DE Cm-248 SF; Ba-143,Ba-145,Ba-147; measured E(gamma); gamma gamma; R(DCO); I-gamma; linear polarisation; ICC; deduced levels; J,pi,gamma-ray intensity; branchings; multi-particle configurations; octupole deformation ID OCTUPOLE DEFORMATION; BARIUM ISOTOPES; REGION; FISSION; MOMENTS; BA-145; BANDS AB The nuclei Ba-143,Ba-145,Ba-147 produced in the spontaneous fission of Cm-248 have been studied using the EUROGAM phase II array. The parities and multipolarities of gamma rays in these nuclei have been assigned from triple angular correlation, directional linear-polarisation correlation and internal conversion coefficient measurements. These data confirm an alternating-parity sequence connected by strong electric dipole transitions in Ba-143. They also reveal a more weakly populated, complementary alternating-parity sequence. The two sequences together exhibit some characteristics of parity-doubler bands. Interpreting the El strengths in terms of a rotating intrinsic dipole moment gives a moment similar in size to that observed in Ba-142 and Ba-144. No well-developed similar structure is seen in Ba-145, although El transitions are observed, from which a value of the dipole moment is obtained. This value is smaller than the moment observed in Ba-143. No features appropriate to strong octupole correlations were observed in Ba-147. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV STRASBOURG 1,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. RP Jones, MA (reprint author), UNIV MANCHESTER,DEPT PHYS & ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 28 TC 57 Z9 58 U1 0 U2 1 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 AUG 5 PY 1996 VL 605 IS 2 BP 133 EP 159 DI 10.1016/0375-9474(96)00194-7 PG 27 WC Physics, Nuclear SC Physics GA VC422 UT WOS:A1996VC42200001 ER PT J AU Intriligator, K Thomas, S AF Intriligator, K Thomas, S TI Dynamical supersymmetry breaking on quantum moduli spaces SO NUCLEAR PHYSICS B LA English DT Article ID ELECTRIC-MAGNETIC DUALITY; GAUGE-THEORIES; EXACT SUPERPOTENTIALS; 4 DIMENSIONS; NATURALNESS; VACUA AB Supersymmetry breaking by the quantum deformation of a classical moduli space is considered. A simple, non-chiral, renormalizable model is presented to illustrate this mechanism. The well-known, chiral, SU(3) x SU(2) model and its generalizations are shown to break supersymmetry by this mechanism in the limit Lambda(2) >> Lambda(3) Other supersymmetry breaking models, with classical flat directions that are only lifted quantum mechanically, are presented. Finally, by integrating in vector matter, the strongly coupled region of chiral models with a dynamically generated superpotential is shown to be continuously connected to a weakly coupled description in terms of confined degrees of freedom, with supersymmetry broken at tree level. C1 STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. UNIV CALIF SANTA BARBARA, INST THEORET PHYS, SANTA BARBARA, CA 93106 USA. RP Intriligator, K (reprint author), INST ADV STUDY, OLDEN LANE, PRINCETON, NJ 08540 USA. NR 28 TC 214 Z9 214 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 AUG 5 PY 1996 VL 473 IS 1-2 BP 121 EP 140 DI 10.1016/0550-3213(96)00261-1 PG 20 WC Physics, Particles & Fields SC Physics GA VB251 UT WOS:A1996VB25100006 ER PT J AU Dorner, R Feagin, JM Cocke, CL Brauning, H Jagutzki, O Jung, M Kanter, EP Khemliche, H Kravis, S Mergel, V Prior, MH SchmidtBocking, H Spielberger, L Ullrich, J Unversagt, M Vogt, T AF Dorner, R Feagin, JM Cocke, CL Brauning, H Jagutzki, O Jung, M Kanter, EP Khemliche, H Kravis, S Mergel, V Prior, MH SchmidtBocking, H Spielberger, L Ullrich, J Unversagt, M Vogt, T TI Fully differential cross sections for double photoionization of he measured by recoil ion momentum spectroscopy SO PHYSICAL REVIEW LETTERS LA English DT Article ID RESOLVED DOUBLE PHOTOIONIZATION; PHOTO-DOUBLE IONIZATION; ANGULAR-DISTRIBUTION; NEAR-THRESHOLD; ENERGY ELECTRONS; HELIUM; SINGLE AB Recoil momentum spectroscopy has been used to measure fully differential cross sections for double photoionization of He at energies of 1-80 eV above threshold. The measurement technique allows the determination of the vector momenta of all three escaping particles, and samples the entire final momentum space. When presented in terms of the momentum vector of the center of mass of the electron pair and the relative momentum of the two electrons, the data reveal simple features of the correlated motion. The resulting patterns near threshold are found to be in agreement with a Wannier description of the process. C1 KANSAS STATE UNIV, DEPT PHYS, MANHATTAN, KS 66506 USA. CALIF STATE UNIV FULLERTON, DEPT PHYS, FULLERTON, CA 92634 USA. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. GESELL SCHWERIONENFORSCH MBH, D-64291 DARMSTADT, GERMANY. RP Dorner, R (reprint author), UNIV FRANKFURT, INST KERNPHYS, AUGUST EULER STR 6, D-60486 FRANKFURT, GERMANY. RI Doerner, Reinhard/A-5340-2008 OI Doerner, Reinhard/0000-0002-3728-4268 NR 27 TC 91 Z9 91 U1 0 U2 2 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 AUG 5 PY 1996 VL 77 IS 6 BP 1024 EP 1027 DI 10.1103/PhysRevLett.77.1024 PG 4 WC Physics, Multidisciplinary SC Physics GA VA476 UT WOS:A1996VA47600011 ER PT J AU Guethlein, G Foord, ME Price, D AF Guethlein, G Foord, ME Price, D TI Electron temperature measurements of solid density plasmas produced by intense ultrashort laser pulses SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY SPECTROSCOPY; HIGH-CONTRAST; TRANSPORT; IONS; ABSORPTION; EMISSION; TARGETS; FUSION AB We report the first spatially and temporally localized measurements of 500 eV electron temperatures in solid density Al plasmas generated by a 3 x 10(17) W/cm(2), 170 fs laser. Expansion velocities of marker layers from various depths are sampled with mass-resolved ion time-of-flight spectroscopy. Hydrodynamic simulations relate the measured velocities to the sound speed, determining the temperature along the central axis of the plasma. Results are consistent with conductive heating of the first 1000 Angstrom. RP Guethlein, G (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 31 TC 59 Z9 59 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 5 PY 1996 VL 77 IS 6 BP 1055 EP 1058 DI 10.1103/PhysRevLett.77.1055 PG 4 WC Physics, Multidisciplinary SC Physics GA VA476 UT WOS:A1996VA47600019 ER PT J AU Mauri, F Zakharov, O de Gironcoli, S Louie, SG Cohen, ML AF Mauri, F Zakharov, O de Gironcoli, S Louie, SG Cohen, ML TI Phonon softening and superconductivity in tellurium under pressure SO PHYSICAL REVIEW LETTERS LA English DT Article ID LINEAR-RESPONSE CALCULATIONS; FUNCTIONAL PERTURBATION-THEORY; LATTICE-DYNAMICS AB The phonon dispersion and the electron-phonon interaction for the beta-Po and the bcc high pressure phases of tellurium are computed with density-functional perturbation theory. Our calculations reproduce and explain the experimentally observed pressure dependence of the superconducting critical temperature (T-c) and confirm the connection between the jump in T-c and the structural phase transition. The phonon contribution to the free energy is shown to be responsible for the difference in the structural transition pressure observed in low and room temperature experiments. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. SCUOLA INT SUPER STUDI AVANZATI, I-34014 TRIESTE, ITALY. IST NAZL FIS MAT, I-34014 TRIESTE, ITALY. RP Mauri, F (reprint author), UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RI de Gironcoli, Stefano/G-7236-2011; mauri, francesco/K-5726-2012 OI de Gironcoli, Stefano/0000-0002-2307-0998; mauri, francesco/0000-0002-6666-4710 NR 16 TC 43 Z9 43 U1 1 U2 9 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 AUG 5 PY 1996 VL 77 IS 6 BP 1151 EP 1154 DI 10.1103/PhysRevLett.77.1151 PG 4 WC Physics, Multidisciplinary SC Physics GA VA476 UT WOS:A1996VA47600043 ER PT J AU Maslov, S AF Maslov, S TI Infinite series of exact equations in the Bak-Sneppen model of biological evolution SO PHYSICAL REVIEW LETTERS LA English DT Article ID SELF-ORGANIZED-CRITICALITY; PUNCTUATED-EQUILIBRIUM; FIELD-THEORY AB We derive an infinite series of exact equations for the Bak-Sneppen (BS) model in arbitrary dimensions. These equations relate different moments of temporal duration and spatial size of avalanches. We prove that the exponents of the BS model are the same above and below the critical point, and express the universal amplitude ratio of the avalanche spatial size in terms of the critical exponents. The equations uniquely determine the shape of the scaling function of the avalanche distribution. It is shown that in the BS model in arbitrary dimensions there is only one independent critical exponent. C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. RP Maslov, S (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Maslov, Sergei/C-2397-2009 OI Maslov, Sergei/0000-0002-3701-492X NR 15 TC 24 Z9 25 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 AUG 5 PY 1996 VL 77 IS 6 BP 1182 EP 1185 DI 10.1103/PhysRevLett.77.1182 PG 4 WC Physics, Multidisciplinary SC Physics GA VA476 UT WOS:A1996VA47600051 ER PT J AU Kauffman, LH Noyes, HP AF Kauffman, LH Noyes, HP TI Discrete physics and the Dirac equation SO PHYSICS LETTERS A LA English DT Article DE discrete physics; choice sequences; Dirac equation; Feynman checkerboard; calculus of finite differences; rational versus complex quantum mechanics ID DERIVATION; MODEL AB We rewrite the 1+1 Dirac equation in light cone coordinates in two significant forms, and solve them exactly using the classical calculus of finite differences, The complex form yields ''Feynman's checkerboard'' - a weighted sum over lattice paths. The rational, real form can also be interpreted in terms of bit-strings. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP Kauffman, LH (reprint author), UNIV ILLINOIS,DEPT MATH STAT & COMP SCI,851 S MORGAN ST,CHICAGO,IL 60607, USA. NR 17 TC 34 Z9 34 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 5 PY 1996 VL 218 IS 3-6 BP 139 EP 146 DI 10.1016/0375-9601(96)00436-7 PG 8 WC Physics, Multidisciplinary SC Physics GA VB393 UT WOS:A1996VB39300004 ER PT J AU Tessarotto, M Johnson, JL White, RB Zheng, LJ AF Tessarotto, M Johnson, JL White, RB Zheng, LJ TI On the existence of weakly non-axisymmetric scalar-pressure magnetostatic equilibria SO PHYSICS LETTERS A LA English DT Article AB A fundamental problem in plasma physics concerns the existence of non-symmetric scalar-pressure magnetostatic equilibria with nested magnetic surfaces and, in particular, weakly non-symmetric equilibria, which are close to toroidal axisymmetric ones. In this paper we determine the periodicity constraints that require the solution to be quasi-symmetric. We then show that weakly non-symmetric equilibria can be constructed by introducing a suitable perturbation scheme based on the variational principle of magnetostatics, for the displacement vector mapping two nearby equilibria. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP Tessarotto, M (reprint author), UNIV TRIESTE,DEPT MATH SCI,I-34127 TRIESTE,ITALY. RI White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 16 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 5 PY 1996 VL 218 IS 3-6 BP 304 EP 311 DI 10.1016/0375-9601(96)00449-5 PG 8 WC Physics, Multidisciplinary SC Physics GA VB393 UT WOS:A1996VB39300027 ER PT J AU Panozzo, J Akan, E Griffiths, TD Woloschak, GE AF Panozzo, J Akan, E Griffiths, TD Woloschak, GE TI The effects of 5-fluorouracil and doxorubicin on expression of human immunodeficiency virus type 1 long terminal repeat SO CANCER LETTERS LA English DT Article DE human immunodeficiency virus (HIV) gene expression; doxorubicin/adriamycin; long terminal repeat of HIV; chemotherapeutic agents; 5-fluorouracil ID CELL-LINE; ULTRAVIOLET-RADIATION; GENE-EXPRESSION; ACTIVATION AB Previous work by many groups has documented induction of the human immunodeficiency virus (HIV) long terminal repeat (LTR) following exposure of cells to ultraviolet light and other DNA damaging agents. Our experiments set out to determine the relative activation or repression of the HIV-LTR in response to two classes of chemotherapeutic agents: Doxorubicin is a DNA damage-inducing agent, and 5-fluorouracil has an antimetabolic mode of action, Using HeLa cells stably transfected with a construct: in which HIV-LTR drives expression of the chloramphenicol acetyl transferase reporter gene, we demonstrated an up to ten-fold induction following doxorubicin treatment at 24 h post-treatment, This induction was repressed by treatment with salicylic acid, suggesting a role for prostaglandin/cyclo-oxygenase pathways and/or NF-kappa B in the inductive response. Induction by 5-fluorouracil, in contrast, was more modest (two-fold at most) though it was consistently elevated over controls. C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. NO ILLINOIS UNIV,DEPT BIOL SCI,DE KALB,IL 60115. RI Woloschak, Gayle/A-3799-2017 OI Woloschak, Gayle/0000-0001-9209-8954 NR 20 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0304-3835 J9 CANCER LETT JI Cancer Lett. PD AUG 2 PY 1996 VL 105 IS 2 BP 217 EP 223 DI 10.1016/0304-3835(96)04285-1 PG 7 WC Oncology SC Oncology GA UZ585 UT WOS:A1996UZ58500013 PM 8697447 ER PT J AU Park, MS Ludwig, DL Stigger, E Lee, SH AF Park, MS Ludwig, DL Stigger, E Lee, SH TI Physical interaction between human RAD52 and RPA is required for homologous recombination in mammalian cells SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID REPLICATION PROTEIN-A; SIMIAN VIRUS-40 DNA; NUCLEOTIDE EXCISION-REPAIR; BINDING-PROTEIN; SACCHAROMYCES-CEREVISIAE; SV40 ORIGIN; INVITRO; EXPRESSION; INITIATION; POLYMERASE AB The yeast RAD52 protein is essential for DNA double-strand break repair, and meiotic and mitotic recombination, RPA is a protein complex of three subunits (70, 34, and II kDa) that has been shown to be involved in DNA replication, nucleotide excision repair, and homologous recombination. Here, we demonstrate a physical interaction between human RAD52 and RPA in vivo and in vitro, In addition, the domain (amino acids 221-280) in RAD52 protein that mediates the interaction with the 34-kDa subunit of RPA was also determined, Overexpression of mutant RAD52 proteins lacking the interaction domain (amino acids 221-240, 241-260, and 261-280) failed to induce homologous recombination in monkey cells, We have previously shown that overexpression of human RAD52 induced homologous recombination in these cells, These results suggest that direct physical interactions between RAD52 and RPA are essential for homologous recombination in mammalian cells. C1 ST JUDE CHILDRENS RES HOSP, DEPT VIROL & MOL BIOL, MEMPHIS, TN 38101 USA. RP Park, MS (reprint author), LOS ALAMOS NATL LAB, DIV LIFE SCI, M888, LOS ALAMOS, NM 87545 USA. FU NIGMS NIH HHS [1RO1 GM52358] NR 37 TC 152 Z9 154 U1 0 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 2 PY 1996 VL 271 IS 31 BP 18996 EP 19000 PG 5 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VB683 UT WOS:A1996VB68300103 PM 8702565 ER PT J AU Farkas, T Sepaniak, MJ Guiochon, G AF Farkas, T Sepaniak, MJ Guiochon, G TI Column radial homogeneity in high-performance liquid chromatography SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE flow velocity distribution; fluorescence detection, on-column; column efficiency ID ELECTROCHEMICAL DETECTOR; HETEROGENEITY; EFFICIENCY; PHASE AB The radial distribution of analyte molecules within an elution band in HPLC was determined by local, on-column, fluorescence detection at the column outlet. Several optical fiber assemblies were implanted in the exit frit at different points over the column cross-section and the fluorescence of a laser-dye analyte was measured. The individual elements of a diode array were used as independent detectors. The distribution of the mobile phase velocity across the column was measured for a number of standard size analytical HPLC columns of different efficiencies, operated at different mobile phase linear velocities. The dependence of the column efficiency on these profiles is discussed. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 22 TC 66 Z9 67 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD AUG 2 PY 1996 VL 740 IS 2 BP 169 EP 181 DI 10.1016/0021-9673(96)00107-0 PG 13 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA VB468 UT WOS:A1996VB46800002 ER PT J AU Cerritelli, ME Wall, JS Simon, MN Conway, JF Steven, AC AF Cerritelli, ME Wall, JS Simon, MN Conway, JF Steven, AC TI Stoichiometry and domainal organization of the long tail-fiber of bacteriophage T4: A hinged viral adhesin SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE adhesin; bacteriophage tail-fiber; molecular stoichiometry; scanning transmission electron microscopy; compute image processing ID TRANSMISSION ELECTRON-MICROSCOPY; MOLECULAR-STRUCTURE; PECTATE LYASE; COILED COILS; DISTAL HALF; PROTEIN; SEQUENCE; DNA; GENES; PRECURSORS AB The long-tail fibers (LTFs) form part of bacteriophage T4's apparatus for host cell recognition and infection, being responsible for its initial attachment to susceptible bacteria. The LTF has two parts, each similar to 70 to 75 nm long; gp34 (140 kDa) forms the proximal half-fiber, while the distal half-fiber is composed of gp37 (109 kDa), gp36 (23 kDa) and gp35 (30 kDa). LTFs have long been thought to be dimers of gp34,gp37 and gp36, with one copy of gp,35. We have used mass mapping by scanning transmission electron microscopy (STEM), quantitative SDS-PAGE, and computational sequence analysis to study the structures of purified LTFs and half-fibers of both kinds. These data establish that the LTF is, in fact, trimeric, with a stoichiometry of gp34: gp37: gp36: gp35 = 3:3:3:1. Averaged images of stained and unstained molecules resolve the LTF into a linear stack of 17 domains. At the proximal end is a globular domain of similar to 145 kDa that becomes incorporated into the baseplate. It is followed by a rod-like shaft (33 x 4 nm; 151 kDa) which correlates with a cluster of seven quasi repeats, each 34 to 39 residues long. The proximal half-fiber terminates in three globular domains. The distal half-fiber consists of ten globular domains of variable size and spacing, preceding a needle-like end domain (15 x 2.5 nm; 31 kDa). The LTF is rigid apart from hinges between the two most proximal domains, and between the proximal and distal half-fibers. The latter hinge occurs at a site of local non-equivalence (the ''kneecap'') at which density, correlated with the presence of gp35, bulges asymmetrically out on one side. Several observations indicate that gp34 participates in the sharing of conserved structural modules among coliphage tail-fiber genes to which gp37 was previously noted to subscribe. Two adjacent globular domains in the proximal half-fiber match a pair of domains in the distal half-fiber, and the rod domain in the proximal half-fiber resembles a similar domain in the T4 short tail-fiber (gp12). Finally, possible structures are considered; combining our data with earlier observations, the most likely conformation for most of the LTF is a three-stranded beta-helix. (C) 1996 Academic Press Limited C1 NIAMSD,NIH,STRUCT BIOL LAB,BETHESDA,MD 20892. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RI Conway, James/A-2296-2010 OI Conway, James/0000-0002-6581-4748 NR 51 TC 65 Z9 70 U1 0 U2 2 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 2 PY 1996 VL 260 IS 5 BP 767 EP 780 DI 10.1006/jmbi.1996.0436 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA VA248 UT WOS:A1996VA24800012 PM 8709154 ER PT J AU Higgins, J Callegari, C Reho, J Stienkemeier, F Ernst, WE Lehmann, KK Gutowski, M Scoles, G AF Higgins, J Callegari, C Reho, J Stienkemeier, F Ernst, WE Lehmann, KK Gutowski, M Scoles, G TI Photoinduced chemical dynamics of high-spin alkali trimers SO SCIENCE LA English DT Article ID HELIUM CLUSTERS; EXCITED-STATES; SPECTROSCOPY; NA-3; SF6 AB Nanometer-sized helium droplets, each containing about 10(4) helium atoms, were used as an inert substrate on which to form previously unobserved, spin-3/2 (quartet state) alkali trimers. Dispersed fluorescence measurements reveal that, upon electronic excitation, the quartet trimers undergo intersystem crossing to the doublet manifold, followed by dissociation of the doublet trimer into an atom and a covalently bound singlet dimer. As shown by this work, aggregates of spin-polarized alkali metals represent ideal species for the optical study of fundamental chemical dynamics processes including nonadiabatic spin conversion, change of bonding nature, and unimolecular dissociation. C1 PRINCETON UNIV, DEPT CHEM, PRINCETON, NJ 08544 USA. UNIV BIELEFELD, FAK PHYS, D-33615 BIELEFELD, GERMANY. PENN STATE UNIV, DEPT PHYS, UNIVERSITY PK, PA 16802 USA. PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. UNIV GDANSK, DEPT CHEM, PL-80952 GDANSK, POLAND. RI Ernst, Wolfgang E/B-3257-2016; Stienkemeier, Frank/C-2865-2016; OI Ernst, Wolfgang E/0000-0001-8849-5658; Callegari, Carlo/0000-0001-5491-7752 NR 24 TC 116 Z9 116 U1 1 U2 9 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD AUG 2 PY 1996 VL 273 IS 5275 BP 629 EP 631 DI 10.1126/science.273.5275.629 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA VA249 UT WOS:A1996VA24900041 ER PT J AU Kwei, GH Lawson, AC Larson, AC Morosin, B Larson, EM Canfield, PC AF Kwei, GH Lawson, AC Larson, AC Morosin, B Larson, EM Canfield, PC TI Structure of Ce2Pt6Ga15: Interplanar disorder from the Ce2Ga3 layers SO ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE LA English DT Article ID ABSORPTION FINE-STRUCTURE AB The structure of the heavy fermion compound Ce2Pt6Ga15 been determined from neutron powder and X-ray/neutron single-crystal diffraction. Examination of symmetry equivalence among the single-crystal data, as well as the good fit of the powder data to the final structural arrangement, with all the atoms on symmetry sites, suggests that the correct space group is P6(3)/mmc. The structure is unusual in that Ce layers have 1/3 of the Ce atoms replaced by groups of three Ga atoms; distances between atoms in these planes suggest this substitution must occur in a concerted fashion. The refined occupancies lead to a stoichiometry near Ce2Pt6Ga15, consistent with such an arrangement. In addition, single-crystal neutron diffraction data show columns of weak diffuse scattering along the < 001 > axes, suggesting disorder arising from a lack of registration of successive Ce2Ga3 layers (lying half a cell length or 8.27 Angstrom apart along z) and a 3 x 3 x 1 supercell. This disorder is very likely responsible for the low resistance ratio of approximately unity measured for single crystal samples. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. SANDIA NATL LABS,ALBUQUERQUE,NM 87123. GRAND CANYON UNIV,PHOENIX,AZ 85017. IOWA STATE UNIV,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011. RP Kwei, GH (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Canfield, Paul/H-2698-2014 NR 9 TC 11 Z9 11 U1 0 U2 5 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7681 J9 ACTA CRYSTALLOGR B JI Acta Crystallogr. Sect. B-Struct. Commun. PD AUG 1 PY 1996 VL 52 BP 580 EP 585 DI 10.1107/S0108768196000481 PN 4 PG 6 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA VG083 UT WOS:A1996VG08300003 ER PT J AU McMullan, RK Ghose, S Haga, N Schomaker, V AF McMullan, RK Ghose, S Haga, N Schomaker, V TI Sodalite, Na4Si3Al3O12Cl: Structure and ionic mobility at high temperatures by neutron diffraction SO ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE LA English DT Article ID PHASE AB Crystal data: Na4Si3Al3O12Cl, cubic, space group , Z = 2, F(000) = 233.06 fm, mu(n) = 0.06 cm(-1), lattice parameter a(o) (Angstrom) [T] (K) at eight temperatures: 8.882(1) [295]; 8.902(2) [500]; 8.912(1) [600]; 8.923(1) [700]; 8.951(2) [800]; 8.971(1) [900]; 8.988(1) [1000]; 9.037(1) [1200]. The crystal structure has been determined at six temperatures (295 less than or equal to T less than or equal to 1200 K) based on neutron diffraction data with (sin theta/lambda) < 0.80 Angstrom(-1). Besides conventional parameters, the least-squares refinement model included thermal tensor parameters up to fourth-order for sodium and chlorine (295 less than or equal to T less than or equal to 1200 K) and up to third-order for oxygen (T greater than or equal to 700 K), together with the 1:1 coupled site occupancy factors of sodium and chlorine (T = 1200 K). The indices-of-fit, wR(F-2), are in the range 0.015-0.028 with observation-to-parameter ratios from 7.0 to 8.6. Bond lengths and angles in the aluminosilicate framework have average e.s.d.'s less than 0.002 Angstrom and 0.08 degrees. Between 295 and 1200 K, the observed Si-O (Al-O) bond lengths differ by -0.015 Angstrom (-0.012 Angstrom); corrections for librating rigid SiO4 (AlO4) groups change the difference to +0.004 Angstrom (+0.006 Angstrom), compared with the 295 K value of 1.620 Angstrom (1.741 Angstrom). The unique Si-O-Al angle increases from 138.24 degrees (295 K) to 146.87 degrees (1200 K), while the Si and Al valence angles are virtually unchanged. Between 295 and 1200 K the [Na4CI] clusters expand with increases in the Na-Cl bond lengths of 0.200 Angstrom, with simultaneous increases in Na-O bond lengths of 0.145 Angstrom and decreases in the shortest Na ... O contact distances of 0.126 Angstrom. The thermal expansion of sodalite is attributed to the increasing amplitudes of coupled translational motion of the Naf ions and the librational motion of the [Al/SiO4] tetrahedra, leading to the untwisting of the aluminosilicate framework. Maps of the probability density functions for Na+ and Cl- indicate ionic diffusion paths along [111] directions. There is a finite probability of finding the Na+ ion within the plane of the next-nearest O atoms, suggesting that Na+ jumps from an occupied to an unoccupied site in the next-nearest cage through the six-membered ring of [Al/SiO4] tetrahedra. C1 UNIV WASHINGTON,DEPT GEOL SCI,MINERAL PHYS GRP,SEATTLE,WA 98195. UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195. HIMEJI INST TECHNOL,FAC SCI,AKO,HYOGO 67812,JAPAN. RP McMullan, RK (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 23 TC 22 Z9 22 U1 0 U2 3 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7681 J9 ACTA CRYSTALLOGR B JI Acta Crystallogr. Sect. B-Struct. Commun. PD AUG 1 PY 1996 VL 52 BP 616 EP 627 DI 10.1107/S0108768196004132 PN 4 PG 12 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA VG083 UT WOS:A1996VG08300008 ER PT J AU Chu, F Lei, M Maloy, SA Petrovic, JJ Mitchell, TE AF Chu, F Lei, M Maloy, SA Petrovic, JJ Mitchell, TE TI Elastic properties of C40 transition metal disilicides SO ACTA MATERIALIA LA English DT Article ID SINGLE-CRYSTALS; SILICIDES; CONSTANTS; MOSI2; TEMPERATURE; DISLOCATIONS; DEFORMATION AB Room-temperature and low temperature elastic properties of hexagonal C40 transition metal disilicides, NbSi2 and TaSi2, have been studied using Resonant Ultrasound Spectroscopy (RUS). All five independent elastic stiffness constants c(ij) for NbSi2 and TaSi2 single crystals have been obtained. The temperature dependence of the c(ij) is normal but not large. The orientation dependence of the Young's and shear moduli was examined in comparison with other transition metal disilicides. The room temperature shear moduli in the {0001} plane, with values of 145.3 and 143.7 GPa for NbSi2 and TaSi2 respectively, are low relative to those in the equivalent pseudo hexagonal {110} close-packed plane for tetragonal C11(b) MoSi2 and WSi2. The isotropic elastic constants for polycrystalline materials were also calculated. The results show that the various moduli are all much higher than those of the constituent elements. The room temperature Poisson's ratios of NbSi2 and TaSi2 are 0.18 and 0.19, respectively, which are smaller than those of the constituent elements and smaller than most materials. The Debye temperatures, theta(D), were estimated to be 688 K for NbSi2 and 552 K for TaSi2. The elastic properties of C40 VSi2, NbSi2, TaSi2, and CrSi2 and C11(b) MoSi2 and WSi2 are compared and the possible influence on mechanical behavior discussed. C1 QUATROS INC, ALBUQUERQUE, NM 87109 USA. RP Chu, F (reprint author), LOS ALAMOS NATL LAB, CTR MAT SCI, MAIL STOP K765, LOS ALAMOS, NM 87545 USA. RI Maloy, Stuart/A-8672-2009 OI Maloy, Stuart/0000-0001-8037-1319 NR 52 TC 87 Z9 88 U1 3 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 AUG PY 1996 VL 44 IS 8 BP 3035 EP 3048 DI 10.1016/1359-6454(95)00442-4 PG 14 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UY539 UT WOS:A1996UY53900002 ER PT J AU Gilbert, CJ Cao, JJ Moberlychan, WJ Dejonghe, LC Ritchie, RO AF Gilbert, CJ Cao, JJ Moberlychan, WJ Dejonghe, LC Ritchie, RO TI Cyclic fatigue and resistance-curve behavior of an in situ toughened silicon carbide with Al-B-C additions SO ACTA MATERIALIA LA English DT Article ID CRACK-GROWTH; MECHANICAL-PROPERTIES; CERAMICS; ALUMINA; TOUGHNESS; MICROSTRUCTURE; COMPOSITES AB The room-temperature crack-growth properties of an in situ toughened, monolithic silicon carbide are reported. Hot pressing was performed at 1900 degrees C with 3 wt.% Al, 2 wt.% C and 0.6 wt.% B additions. Compared to a commercial SiC (Hexoloy SA), significant improvements in both the fracture toughness and cyclic fatigue-crack propagation resistance have been achieved through control of the beta to alpha transformation. Using fatigue-precracked, disk-shaped compact-tension specimens, marked rising resistance-curve behavior was measured over the first similar to 600 mu m of crack extension, leading to a ''plateau'' fracture toughness of K-c similar to 9.1 MPa root m; this represents more than a threefold increase over the toughness of Hexoloy, where a K-c value of 2.5 MPa root m was measured with no evidence of a resistance curve. Cyclic fatigue-crack growth rates in the toughened SiC were found to be faster than those under sustained loads (static fatigue) at the same stress-intensity level. The cyclic fatigue-crack growth resistance was found to be far superior to that of Hexoloy. Whereas cracking in the commercial SiC became unstable when the maximum stress intensity K-max exceeded similar to 2 MPa root m, thresholds for fatigue-crack growth in the in situ toughened material exceeded a K-max of 7 MPa root m. Such dramatic improvements in the crack-growth resistance of SiC are attributed to a microstructure consisting of a network of interlocking, plate-like predominantly ct-phase grains, which combine to both bridge and deflect the crack. Under cyclic loads, fatigue-crack growth is promoted by the cycle-dependent decay in such crack-tip shielding due to frictional-wear degradation of the zone of grain bridging ligaments in the crack wake. These results represent the first reported evidence of cyclic fatigue behavior in a monolithic silicon carbide and the first direct measurement of the resistance curve properties in this ceramic. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP Gilbert, CJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Ritchie, Robert/A-8066-2008 OI Ritchie, Robert/0000-0002-0501-6998 NR 51 TC 65 Z9 65 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD AUG PY 1996 VL 44 IS 8 BP 3199 EP 3214 DI 10.1016/1359-6454(95)00409-2 PG 16 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UY539 UT WOS:A1996UY53900016 ER PT J AU Henshall, GA Strum, MJ AF Henshall, GA Strum, MJ TI Continuum predictions of deformation in composites with two creeping phases .1. Model systems SO ACTA MATERIALIA LA English DT Article ID METAL MATRIX COMPOSITE; WHISKER-REINFORCED METAL; CERAMIC COMPOSITES; DUCTILE PHASES; BEHAVIOR; FIBERS; FLOW; STRENGTH; FRACTURE; ALLOYS AB Analytical and finite element (FE) method continuum analyses of deformation are described for model composites in which both phases exhibit either transient or steady-state creep. Both models predict that the presence of a weak ductile phase within a strong matrix, e.g. ductile-phase toughened intermetallic matrix composites, degrades the creep resistance of the strong phase less severely with decreases in: (1) the stress exponent of the matrix; (2) the volume fraction of the discontinuous ductile phase; and (3) the creep rate of the ductile phase. The FE models predict potential locations for creep damage within the composite, and that the steady-state creep rate of strong-matrix composites is nearly independent of the reinforcement geometry. Finally, both models predict that the composite steady-state stress exponent generally nearly equals that of the slower creeping phase due to the redistribution of stress from the faster to the slower creeping phase. RP Henshall, GA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 31 TC 2 Z9 2 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD AUG PY 1996 VL 44 IS 8 BP 3249 EP 3257 DI 10.1016/1359-6454(95)00408-4 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA UY539 UT WOS:A1996UY53900020 ER PT J AU Karbowiak, M Murdoch, K Drozdzynski, J Edelstein, N Hubert, S AF Karbowiak, M Murdoch, K Drozdzynski, J Edelstein, N Hubert, S TI Luminescence and excitation spectra of U3+ doped RbY2Cl7 single crystals SO ACTA PHYSICA POLONICA A LA English DT Article; Proceedings Paper CT 2nd International Winter Workshop on Spectroscopy and Structure of Rare Earth Systems (SSRES) CY MAR 24-29, 1996 CL POLANICA ZDROJ, POLAND SP Polish Acad Sci, Comm Sci Res, Polish Acad Sci, Comm Phys, Proteko Ltd, Uni Export Instruments Ltd, Kubicz Sci Bookshop, Klodzko Hlth Resort AB Uranium(3+) doped single crystals of RbY2Cl7 with a uranium concentration of 0.05% and 0.2% were grown by the Bridgman-Stockbarger method using RbU2Cl7 as the doping substance. Polished plates of ca. 5 mm in diameter were used for measurements of luminescence and excitation spectra. Since the U3+ ions occupy two somewhat different site symmetries, a splitting of all observed f-f bands was observed. The analysis of the spectra enabled definitively an assignment of 2 crystal field bands for both site symmetries as well as the total crystal field splitting of the ground level, equal to 473 cm(-1) and 567 cm(-1) for the first and second site symmetry, respectively. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA USA. INST PHYS NUCL, GRP RADIOCHIM, F-91406 ORSAY, FRANCE. RP Karbowiak, M (reprint author), UNIV WROCLAW, FAC CHEM, JOLIOT CURIE 14, PL-50383 WROCLAW, POLAND. NR 9 TC 3 Z9 3 U1 0 U2 0 PU POLISH ACAD SCIENCES INST PHYSICS PI WARSAW PA AL LOTNIKOW 32-46, 02-668 WARSAW, POLAND SN 0587-4246 J9 ACTA PHYS POL A JI Acta Phys. Pol. A PD AUG PY 1996 VL 90 IS 2 BP 371 EP 376 PG 6 WC Physics, Multidisciplinary SC Physics GA VF829 UT WOS:A1996VF82900018 ER PT J AU Harlander, R Jezabek, M Kuhn, JH AF Harlander, R Jezabek, M Kuhn, JH TI Higgs effects in top quark pair production SO ACTA PHYSICA POLONICA B LA English DT Article ID T(T)OVER-BAR PRODUCTION; MOMENTUM DISTRIBUTIONS; NEAR-THRESHOLD; BOSON; DECAY AB Top quark production in and e(+)e(-) collisions is enhanced by the exchange of a Higgs boson. The enhancement factors are calculated in the threshold region using the Green function method. C1 INST NUCL PHYS,PL-30055 KRAKOW,POLAND. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP Harlander, R (reprint author), INST THEORET TEILCHENPHYS,KAISERSTR 12,D-76128 KARLSRUHE,GERMANY. NR 14 TC 12 Z9 12 U1 0 U2 0 PU POLISH ACAD SCIENCES INST PHYSICS PI WARSAW PA AL LOTNIKOW 32-46, 02-668 WARSAW, POLAND SN 0587-4254 J9 ACTA PHYS POL B JI Acta Phys. Pol. B PD AUG PY 1996 VL 27 IS 8 BP 1781 EP 1788 PG 8 WC Physics, Multidisciplinary SC Physics GA VE918 UT WOS:A1996VE91800008 ER EF