FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Muhammed, M Rao, KV Wang, LN Zakharchenko, IV Xu, JH Grishin, AM Balachandran, U AF Muhammed, Mamoun Rao, K. V. Wang, L. N. Zakharchenko, I. V. Xu, J. H. Grishin, A. M. Balachandran, U. TI PROCESSING NANOPHASE POWDERS TOWARDS HIGH PERFORMANCE SUPERCONDUCTING TAPES SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article AB Ultrafine Bi-2223 precursors produced by novel chemical techniques have been used to fabricate several meter-long Ag-clad Bi-2223 supercondrcting tapes by the powder-in-tube technique. As a result, within sixty hours of thermal processing, J(c) values of the optimized samples are achieved as high as 4.4 x 10(4) A/cm(2) at 77 K in zero applied field. At each processing step of tape fabrication, the extensive studies have been made based on comprehensive X-ray diffraction analysis (XRD), SEM and electrical (R(T),I-V) measurements. C1 [Muhammed, Mamoun; Wang, L. N.; Zakharchenko, I. V.] Royal Inst Technol, Dept Inorgan Chem, S-10044 Stockholm, Sweden. [Rao, K. V.; Xu, J. H.; Grishin, A. M.] Royal Inst Technol, Dept Condensed Matter Phys, S-10044 Stockholm, Sweden. [Balachandran, U.] Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Muhammed, M (reprint author), Royal Inst Technol, Dept Inorgan Chem, S-10044 Stockholm, Sweden. FU Swedish funding Agency NUTEK; Swedish funding Agency NFR; Swedish Academy of Sciences East-European exchange program FX The research is supported by the Swedish funding Agencies NUTEK, NFR and partly by the Swedish Academy of Sciences East-European exchange program. 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B PD DEC 1 PY 1994 VL 50 IS 21 BP 15559 EP 15574 DI 10.1103/PhysRevB.50.15559 PG 16 WC Physics, Condensed Matter SC Physics GA PV862 UT WOS:A1994PV86200006 ER PT J AU SHASTRI, A BORSA, F TORGESON, DR SHIELD, JE AF SHASTRI, A BORSA, F TORGESON, DR SHIELD, JE TI NMR AND NQR STUDY OF THE ELECTRONIC AND STRUCTURAL-PROPERTIES OF AL-CU-FE AND AL-CU-RU QUASI-CRYSTALS SO PHYSICAL REVIEW B LA English DT Article ID QUASI-CRYSTALS; MAGNETIC-RESONANCE; NONCUBIC METALS; ALLOYS; SUSCEPTIBILITY; SPECTRA; MN; NI C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. UNIV PAVIA,DIPARTIMENTO FIS,I-27100 PAVIA,ITALY. RP SHASTRI, A (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 44 TC 43 Z9 43 U1 1 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 DEC 1 PY 1994 VL 50 IS 21 BP 15651 EP 15667 DI 10.1103/PhysRevB.50.15651 PG 17 WC Physics, Condensed Matter SC Physics GA PV862 UT WOS:A1994PV86200017 ER PT J AU MCDOWELL, AF SNYDERMAN, DM CONRADI, MS SILBERNAGEL, BG STACY, AM AF MCDOWELL, AF SNYDERMAN, DM CONRADI, MS SILBERNAGEL, BG STACY, AM TI CROSS-RELAXATION AND ATOMIC MOTION IN LINBO2 SO PHYSICAL REVIEW B LA English DT Article ID MOLYBDENUM CLUSTER CHALCOGENIDES; SPIN-LATTICE RELAXATION; ROTATING SOLIDS; NMR; SYSTEMS; LIXNBO2; GLASSES C1 EXXON RES & ENGN CO,CORP RES,ANNANDALE,NJ 08801. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP MCDOWELL, AF (reprint author), WASHINGTON UNIV,DEPT PHYS 1105,ST LOUIS,MO 63130, USA. NR 28 TC 15 Z9 15 U1 1 U2 8 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 DEC 1 PY 1994 VL 50 IS 21 BP 15764 EP 15774 DI 10.1103/PhysRevB.50.15764 PG 11 WC Physics, Condensed Matter SC Physics GA PV862 UT WOS:A1994PV86200028 ER PT J AU GIAPINTZAKIS, J GINSBERG, DM KIRK, MA OCKERS, S AF GIAPINTZAKIS, J GINSBERG, DM KIRK, MA OCKERS, S TI TESTING MODELS OF THE SYMMETRY OF THE SUPERCONDUCTING PAIRING STATE BY LOW-TEMPERATURE ELECTRON-IRRADIATION OF AN UNTWINNED SINGLE-CRYSTAL OF YBA2CU3O7-DELTA SO PHYSICAL REVIEW B LA English DT Article ID ATOMIC DISORDER; BREAKING; 60-K; TC C1 UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP GIAPINTZAKIS, J (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. NR 23 TC 88 Z9 89 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. 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D PD DEC 1 PY 1994 VL 50 IS 11 BP 7048 EP 7065 DI 10.1103/PhysRevD.50.7048 PG 18 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PW165 UT WOS:A1994PW16500042 ER PT J AU SANDORFI, AM WHISNANT, CS KHANDAKER, M AF SANDORFI, AM WHISNANT, CS KHANDAKER, M TI INCOMPATIBILITY OF MULTIPOLE PREDICTIONS FROM THE NUCLEON SPIN-POLARIZABILITY AND DRELL-HEARN-GERASIMOV SUM-RULES SO PHYSICAL REVIEW D LA English DT Note ID INELASTIC-SCATTERING; SCHWINGER; EVOLUTION; PROTON; G2 C1 UNIV S CAROLINA, DEPT PHYS, COLUMBIA, SC 29208 USA. VIRGINIA POLYTECH INST & STATE UNIV, DEPT PHYS, BLACKSBURG, VA 24061 USA. RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. NR 33 TC 74 Z9 74 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD DEC 1 PY 1994 VL 50 IS 11 BP R6681 EP R6685 DI 10.1103/PhysRevD.50.R6681 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PW165 UT WOS:A1994PW16500001 ER PT J AU EVANS, JW RAY, TR AF EVANS, JW RAY, TR TI INTERFACE PROPAGATION AND NUCLEATION PHENOMENA FOR DISCONTINUOUS POISONING TRANSITIONS IN SURFACE-REACTION MODELS SO PHYSICAL REVIEW E LA English DT Article ID KINETIC PHASE-TRANSITIONS; MEAN-FIELD THEORY; A-B(2) REACTION MODEL; COMPUTER-SIMULATIONS; CATALYSIS; DIFFUSION; BEHAVIOR; DESORPTION; LATTICE; GROWTH C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MATH,AMES,IA 50011. RP EVANS, JW (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 43 TC 52 Z9 52 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 4302 EP 4314 DI 10.1103/PhysRevE.50.4302 PG 13 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800008 ER PT J AU BROWN, R RULKOV, NF TUFILLARO, NB AF BROWN, R RULKOV, NF TUFILLARO, NB TI SYNCHRONIZATION OF CHAOTIC SYSTEMS - THE EFFECTS OF ADDITIVE NOISE AND DRIFT IN THE DYNAMICS OF THE DRIVING SO PHYSICAL REVIEW E LA English DT Article ID STRANGE ATTRACTORS; ORBITS; INFORMATION; REDUCTION; DIMENSION; SIGNALS; ENTROPY C1 LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA. RP UNIV CALIF SAN DIEGO, INST NONLINEAR SCI, LA JOLLA, CA 92093 USA. RI Rulkov, Nikolai/S-3447-2016 NR 58 TC 59 Z9 61 U1 1 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 4488 EP 4508 DI 10.1103/PhysRevE.50.4488 PG 21 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800024 ER PT J AU TUFILLARO, NB AF TUFILLARO, NB TI BRAID ANALYSIS OF A BOUNCING BALL SO PHYSICAL REVIEW E LA English DT Article ID STRANGE ATTRACTORS; PERIODIC-ORBITS; CHAOTIC DYNAMICS; TRAIN TRACKS; LASER; MAPS C1 LOS ALAMOS NATL LAB,DIV THEORET T13,LOS ALAMOS,NM 87545. RP TUFILLARO, NB (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,MS-B258,LOS ALAMOS,NM 87545, USA. NR 45 TC 21 Z9 21 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 4509 EP 4522 DI 10.1103/PhysRevE.50.4509 PG 14 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800025 ER PT J AU OKAMOTO, H AF OKAMOTO, H TI TRANSVERSE LASER COOLING INDUCED THROUGH DISPERSION AT AN RF CAVITY SO PHYSICAL REVIEW E LA English DT Article ID STORAGE RING; IONS C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. KYOTO UNIV,CHEM RES INST,ACCELERATOR LAB,UJI,KYOTO 611,JAPAN. NR 16 TC 33 Z9 33 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 4982 EP 4996 DI 10.1103/PhysRevE.50.4982 PG 15 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800079 ER PT J AU HUMMER, G SOUMPASIS, DM AF HUMMER, G SOUMPASIS, DM TI STATISTICAL-MECHANICAL TREATMENT OF THE STRUCTURAL HYDRATION OF BIOLOGICAL MACROMOLECULES - RESULTS FOR B-DNA SO PHYSICAL REVIEW E LA English DT Article ID ORDERED WATER-STRUCTURE; MOLECULAR-DYNAMICS; SOLVENT STRUCTURE; DOUBLE HELICES; MINOR-GROOVE; BOUND WATER; A-DNA; SIMULATIONS; ELECTROLYTES; TRANSITIONS C1 MAX PLANCK INST BIOPHYS CHEM,BIOCOMPUTAT GRP,D-37018 GOTTINGEN,GERMANY. RP HUMMER, G (reprint author), LOS ALAMOS NATL LAB,THEORET BIOL & BIOPHYS GRP T10,MS K710,LOS ALAMOS,NM 87545, USA. RI Hummer, Gerhard/A-2546-2013 OI Hummer, Gerhard/0000-0001-7768-746X NR 61 TC 26 Z9 26 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 5085 EP 5095 DI 10.1103/PhysRevE.50.5085 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800091 ER PT J AU CHINN, CR UMAR, AS VALLIERES, M STRAYER, MR AF CHINN, CR UMAR, AS VALLIERES, M STRAYER, MR TI PARALLEL IMPLEMENTATION OF MANY-BODY MEAN-FIELD EQUATIONS SO PHYSICAL REVIEW E LA English DT Article ID HARTREE-FOCK CALCULATIONS; HEAVY-ION COLLISIONS; ALGORITHMS; HYPERCUBE; LATTICE; FORCE C1 OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,DIV PHYS,OAK RIDGE,TN 37831. DREXEL UNIV,DEPT PHYS & ATMOSPHER SCI,PHILADELPHIA,PA 19104. RP CHINN, CR (reprint author), VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235, USA. RI Umar, Ahmet/J-4125-2013 OI Umar, Ahmet/0000-0002-9267-5253 NR 21 TC 4 Z9 4 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD DEC PY 1994 VL 50 IS 6 BP 5096 EP 5106 DI 10.1103/PhysRevE.50.5096 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA QA108 UT WOS:A1994QA10800092 ER PT J AU LONDERGAN, JT GARVEY, GT LIU, GQ RODIONOV, EN THOMAS, AW AF LONDERGAN, JT GARVEY, GT LIU, GQ RODIONOV, EN THOMAS, AW TI DRELL-YAN PROCESSES AS A PROBE OF CHARGE-SYMMETRY VIOLATION IN THE PION AND THE NUCLEON SO PHYSICS LETTERS B LA English DT Article ID GOTTFRIED SUM-RULE; INELASTIC LEPTON SCATTERING; PARTON DISTRIBUTIONS; QUARK DISTRIBUTIONS; SPIN; BREAKING; PROTON; MODEL; SEA; DEPENDENCE AB We extend earlier investigations of charge symmetry violation in the valence quark distributions of the nucleon, and make similar estimates for the pion. The sensitivity of pion-induced Drell-Yan measurements to such effects is then examined. It is shown that combinations of pi(+) and pi(-) data on deuterium and hydrogen are sensitive to these violations, and that the pion and nucleon charge symmetry violating terms separate as a function of x(pi) and x(N) respectively. We estimate the background terms which must be evaluated to extract charge symmetry violation. C1 INDIANA UNIV,CTR NUCL THEORY,BLOOMINGTON,IN 47408. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV ADELAIDE,DEPT PHYS & MATH PHYS,ADELAIDE,SA 5005,AUSTRALIA. RP LONDERGAN, JT (reprint author), INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47408, USA. RI Thomas, Anthony/G-4194-2012 OI Thomas, Anthony/0000-0003-0026-499X NR 44 TC 21 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD DEC 1 PY 1994 VL 340 IS 1-2 BP 115 EP 121 DI 10.1016/0370-2693(94)91306-4 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PV699 UT WOS:A1994PV69900019 ER PT J AU ALDE, D BINON, FG BOUTEMEUR, M BRICMAN, C DONSKOV, SV GOUANERE, M INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KNAPP, EA KONDASHOV, AA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA PEIGNEUX, JP POLOVNIKOV, SA POLYAKOV, VA POULET, M PROKOSHKIN, YD SADOVSKY, SA SAMOYLENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKY, AV STROOT, JP SUGONYAEV, VP AF ALDE, D BINON, FG BOUTEMEUR, M BRICMAN, C DONSKOV, SV GOUANERE, M INYAKIN, AV KACHANOV, VA KHAUSTOV, GV KNAPP, EA KONDASHOV, AA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA PEIGNEUX, JP POLOVNIKOV, SA POLYAKOV, VA POULET, M PROKOSHKIN, YD SADOVSKY, SA SAMOYLENKO, VD SHAGIN, PM SHTANNIKOV, AV SINGOVSKY, AV STROOT, JP SUGONYAEV, VP TI OBSERVATION OF THE OMEGA-]PI(0)PI(0)GAMMA DECAY SO PHYSICS LETTERS B LA English DT Article ID V0->P0P0-GAMMA AB The rare radiative decay omega-->pi(0) pi(0) gamma has been detected with the GAMS-2000 multiphoton spectrometer at the IHEP 70 GeV accelerator. The omega-->pi(0) gamma decay events have been used for normalization. The measured branching ratio is BR(omega-->pi(0) pi(0) gamma) = (7.2 +/- 2.6) X 10(-5). C1 INST INTERUNIV SCI NUCL,B-1050 BRUSSELS,BELGIUM. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. LAB ANNECY LE VIEUX PHYS PARTICULES,F-74019 ANNECY LE VIEUX,FRANCE. UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,PQ,CANADA. RP ALDE, D (reprint author), PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,RUSSIA. NR 12 TC 22 Z9 22 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD DEC 1 PY 1994 VL 340 IS 1-2 BP 122 EP 124 DI 10.1016/0370-2693(94)91307-2 PG 3 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PV699 UT WOS:A1994PV69900020 ER PT J AU ALEXANDER, FJ GARCIA, AL ALDER, BJ AF ALEXANDER, FJ GARCIA, AL ALDER, BJ TI DIRECT SIMULATION MONTE-CARLO FOR THIN-FILM BEARINGS SO PHYSICS OF FLUIDS LA English DT Article ID MOLECULAR-DYNAMICS; RAREFIED-GAS; DILUTE GAS; FLOWS; SLIP C1 SAN JOSE STATE UNIV,DEPT PHYS,SAN JOSE,CA 95192. RP ALEXANDER, FJ (reprint author), LAWRENCE LIVERMORE NATL LAB,INST SCI COMP RES L416,LIVERMORE,CA 94550, USA. NR 39 TC 94 Z9 103 U1 1 U2 5 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 DEC PY 1994 VL 6 IS 12 BP 3854 EP 3860 DI 10.1063/1.868377 PG 7 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA PW984 UT WOS:A1994PW98400008 ER PT J AU CHANG, CS ZWEBEN, SJ SCHIVELL, J BUDNY, R SCOTT, S AF CHANG, CS ZWEBEN, SJ SCHIVELL, J BUDNY, R SCOTT, S TI MODEL FOR COLLISIONAL FAST-ION DIFFUSION INTO TOKAMAK FUSION TEST REACTOR LOSS CONE SO PHYSICS OF PLASMAS LA English DT Article ID TOROIDAL FIELD RIPPLE; AXISYMMETRIC TOKAMAKS; PRODUCT BOMBARDMENT; ALPHA-PARTICLES; 1ST WALL; TRANSPORT; INJECTION; PLASMA C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. KOREA ADV INST SCI & TECHNOL,TAEJON 305701,SOUTH KOREA. RP CHANG, CS (reprint author), NYU,COURANT INST MATH SCI,NEW YORK,NY 10012, USA. NR 24 TC 12 Z9 12 U1 1 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 DEC PY 1994 VL 1 IS 12 BP 3857 EP 3870 DI 10.1063/1.870858 PG 14 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900016 ER PT J AU CHARLTON, LA LEBOEUF, JN CARRERAS, BA LYNCH, VE AF CHARLTON, LA LEBOEUF, JN CARRERAS, BA LYNCH, VE TI RADIATION-DRIVEN TURBULENCE AT THE PLASMA EDGE IN TOROIDAL DEVICES SO PHYSICS OF PLASMAS LA English DT Article ID TEXT TOKAMAK; DRIFT WAVE; TRANSPORT; FLUCTUATIONS; INSTABILITIES RP CHARLTON, LA (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. RI Lynch, Vickie/J-4647-2012 OI Lynch, Vickie/0000-0002-5836-7636 NR 31 TC 14 Z9 14 U1 0 U2 1 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 DEC PY 1994 VL 1 IS 12 BP 3871 EP 3882 DI 10.1063/1.870859 PG 12 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900017 ER PT J AU WANG, CY JAEGER, EF BATCHELOR, DB SIDIKMAN, KL AF WANG, CY JAEGER, EF BATCHELOR, DB SIDIKMAN, KL TI FAST-WAVE POLOIDAL FLOW GENERATION IN A PLASMA SO PHYSICS OF PLASMAS LA English DT Article ID ION-CYCLOTRON RANGE; 2-COMPONENT PLASMA; EDGE TURBULENCE; FREQUENCY; DRIVE RP WANG, CY (reprint author), OAK RIDGE NATL LAB,DIV FUS ENERGY,OAK RIDGE,TN 37831, USA. NR 16 TC 14 Z9 15 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 DEC PY 1994 VL 1 IS 12 BP 3890 EP 3895 DI 10.1063/1.870860 PG 6 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900019 ER PT J AU PHILLIPS, CK WILSON, JR HOSEA, JC MAJESKI, R SMITHE, DN AF PHILLIPS, CK WILSON, JR HOSEA, JC MAJESKI, R SMITHE, DN TI COMMENTS ON FINITE LARMOR RADIUS MODELS FOR ION-CYCLOTRON RANGE OF FREQUENCIES HEATING IN TOKAMAKS SO PHYSICS OF PLASMAS LA English DT Article C1 MISSION RES CORP,NEWINGTON,VA 22122. RP PHILLIPS, CK (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 9 TC 2 Z9 2 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 DEC PY 1994 VL 1 IS 12 BP 3905 EP 3907 DI 10.1063/1.870862 PG 3 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900021 ER PT J AU GRISHAM, LR SCOTT, SD GOLDSTON, RJ BELL, MG BRETZ, NL GREK, B JOHNSON, D MANSFIELD, D MUELLER, D PARK, HK RAMSEY, A TAYLOR, G AF GRISHAM, LR SCOTT, SD GOLDSTON, RJ BELL, MG BRETZ, NL GREK, B JOHNSON, D MANSFIELD, D MUELLER, D PARK, HK RAMSEY, A TAYLOR, G TI SCALING OF OHMIC ENERGY CONFINEMENT WITH MAJOR RADIUS IN THE TOKAMAK FUSION TEST REACTOR SO PHYSICS OF PLASMAS LA English DT Article ID MINOR RADIUS RP GRISHAM, LR (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 12 TC 0 Z9 0 U1 1 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 DEC PY 1994 VL 1 IS 12 BP 3996 EP 4001 DI 10.1063/1.870869 PG 6 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900029 ER PT J AU MATTOR, N DIAMOND, PH AF MATTOR, N DIAMOND, PH TI DRIFT-WAVE PROPAGATION AS A SOURCE OF PLASMA EDGE TURBULENCE - SLAB THEORY SO PHYSICS OF PLASMAS LA English DT Article ID TOKAMAK EDGE; DENSITY-FLUCTUATIONS; ANOMALOUS TRANSPORT; INSTABILITY; GRADIENT; MICROTURBULENCE; MODES; FIELD C1 UNIV CALIF SAN DIEGO,SAN DIEGO,CA 92093. RP MATTOR, N (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 48 TC 33 Z9 33 U1 0 U2 1 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 DEC PY 1994 VL 1 IS 12 BP 4002 EP 4013 DI 10.1063/1.870870 PG 12 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900030 ER PT J AU CARRERAS, BA NEWMAN, D DIAMOND, PH LIANG, YM AF CARRERAS, BA NEWMAN, D DIAMOND, PH LIANG, YM TI DYNAMICS OF LOW TO HIGH (L TO H) CONFINEMENT BIFURCATION - POLOIDAL FLOW AND ION PRESSURE-GRADIENT EVOLUTION SO PHYSICS OF PLASMAS LA English DT Article ID DISCHARGES; TURBULENCE; GENERATION; TOKAMAK; REGIME C1 UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP CARRERAS, BA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 15 TC 74 Z9 74 U1 1 U2 3 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 DEC PY 1994 VL 1 IS 12 BP 4014 EP 4021 DI 10.1063/1.870871 PG 8 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900031 ER PT J AU RAMBO, PW DENAVIT, J AF RAMBO, PW DENAVIT, J TI INTERPENETRATION AND ION SEPARATION IN COLLIDING PLASMAS SO PHYSICS OF PLASMAS LA English DT Article ID X-RAY LASERS; SIMULATION; TARGETS; ABSORPTION; COLLISION; FLUID RP RAMBO, PW (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 25 TC 47 Z9 47 U1 0 U2 3 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 DEC PY 1994 VL 1 IS 12 BP 4050 EP 4060 DI 10.1063/1.870875 PG 11 WC Physics, Fluids & Plasmas SC Physics GA PV949 UT WOS:A1994PV94900035 ER PT J AU MURPHY, TM UTTS, JM AF MURPHY, TM UTTS, JM TI A RETROSPECTIVE ANALYSIS OF PEER-REVIEW AT PHYSIOLOGIA-PLANTARUM SO PHYSIOLOGIA PLANTARUM LA English DT Article DE PEER REVIEW; PHYSIOLOGIA PLANTARUM AB An analysis of 134 reviews of manuscripts submitted to the North American Editorial Office of Physiologia Plantarum in 1993 compared personal/professional characteristics of the reviewers and the specificity of the interest and experience of the reviewers, relative to the reviewed paper, to the depth and tone of the reviews, the presence of constructive suggestions, and the recommendations for or against publication. There was no significant difference between the reviews from the reviewers of different ranks or degrees of seniority, of different employment sectors, of different degrees of interest and experience in the subject of the paper, or of other subgroups, except that reviewers whose interest and experience were very specific to the topic of the paper tended to give more constructive suggestions, and assistant professors tended to be less accepting of papers than editors more frequently than did reviewers in general. Recommendations regarding a manuscript were more similar than could be accounted for by chance, providing a positive indication of the reliability of the review system. Editors in their decisions tended to follow the recommendations of reviewers, but when reviewers took an extreme tone, either positive or negative, the editors tended to provide a balancing function. The data provide support for the reliability and lack of bias in a commonly used peer-review system. C1 LAWRENCE LIVERMORE NATL LAB,DIV STAT,DAVIS,CA 95616. RP MURPHY, TM (reprint author), LAWRENCE LIVERMORE NATL LAB,PLANT BIOL SECT,DAVIS,CA 95616, USA. NR 8 TC 1 Z9 1 U1 1 U2 1 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0031-9317 J9 PHYSIOL PLANTARUM JI Physiol. Plant. PD DEC PY 1994 VL 92 IS 4 BP 535 EP 542 PG 8 WC Plant Sciences SC Plant Sciences GA PY375 UT WOS:A1994PY37500001 ER PT J AU PONS, TL PEARCY, RW AF PONS, TL PEARCY, RW TI NITROGEN REALLOCATION AND PHOTOSYNTHETIC ACCLIMATION IN RESPONSE TO PARTIAL SHADING IN SOYBEAN PLANTS SO PHYSIOLOGIA PLANTARUM LA English DT Article DE GLYCINE MAX; NITROGEN REALLOCATION; PARTIAL SHADING; PHOTOSYNTHETIC NITROGEN USE EFFICIENCY; SHADE ACCLIMATION; SOYBEAN ID LEAF NITROGEN; USE EFFICIENCY; CANOPY PHOTOSYNTHESIS; DIFFERENT IRRADIANCES; ALOCASIA-MACRORRHIZA; INDUCTION STATE; LUCERNE CANOPY; VULGARIS L; LEAVES; LIGHT AB The first trifoliate of soybean was shaded when fully expanded, while the plant remained in high light; a situation representative for plants growing in a closed crop. Leaf mass and respiration rate per unit area declined sharply in the first few days upon shading and remained rather constant during the further 12 days of the shading treatment. Leaf nitrogen per unit area decreased gradually until the leaves were shed. Leaf senescence was enhanced by the shading treatment in contrast to control plants growing in low light. Shaded leaves on plants grown at low nutrient availability senesced earlier than shaded leaves on plants grown at high nutrient availability. The light saturated rate of photosynthesis decreased also gradually during the shading treatment, but somewhat faster than leaf N, whereas chlorophyll contents declined somewhat slower than leaf N. Partitioning of N in the leaf over main photosynthetic functions was estimated from parameters derived from the response of photosynthesis to CO2. It appeared that the N exported from the leaf was more at the expense of compounds that make up photosynthetic capacity than of those involved in photon absorption, resulting in a change in partitioning of N within the photosynthetic apparatus. Photosynthetic nitrogen use efficiency increased during the shading treatment, which was for the largest part due to the decrease in leaf N content, to some extent to the decrease in respiration rate and only for a small part to change in partitioning of N within the photosynthetic apparatus. C1 UNIV UTRECHT,DEPT PLANT ECOL & EVOLUT BIOL,3508 TB UTRECHT,NETHERLANDS. RP PONS, TL (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT BOT,DAVIS,CA 95616, USA. NR 33 TC 78 Z9 83 U1 2 U2 13 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0031-9317 J9 PHYSIOL PLANTARUM JI Physiol. Plant. PD DEC PY 1994 VL 92 IS 4 BP 636 EP 644 PG 9 WC Plant Sciences SC Plant Sciences GA PY375 UT WOS:A1994PY37500014 ER PT J AU HANSON, GR WILGEN, JB BIGELOW, TS COLLAZO, I ENGLAND, AC MURAKAMI, M RASMUSSEN, DA THOMAS, CE WILSON, JR PARK, HK AF HANSON, GR WILGEN, JB BIGELOW, TS COLLAZO, I ENGLAND, AC MURAKAMI, M RASMUSSEN, DA THOMAS, CE WILSON, JR PARK, HK TI MICROWAVE REFLECTOMETRY FOR EDGE DENSITY PROFILE MEASUREMENTS ON TFTR SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article AB A new type of reflectometer not previously used on Tokamaks has been installed on TFTR to measure edge electron density profiles. This reflectometer gives unambiguous edge profiles despite large edge density fluctuations and the presence of strong auxiliary heating. The effects of the large density fluctuations in the edge gradient region are overcome by reducing the multiplicity of fringes and eliminating phase excursions produced by scattering from density fluctuations at the reflecting layer. This is accomplished by using differential-reflectometry: the difference phase between two probing signals reflecting from cut-off layers separated by a distance much less than the correlation length of the density fluctuations is used. This system probes the TFTR plasma using the extraordinary mode (X-mode) with two signals swept from 90-118 GHz while maintaining a fixed difference frequency of 125 MHz between these signals. It has been used to obtain density profiles in the range of 1 x 10(11) to 3 x 10(13) cm(-3) in high-field (4.5-4.9 T) full size (R(0) = 2.62 m, a = 0.96 m) TFTR plasmas. The reflectometer launcher is located in an ion cyclotron range of frequencies (ICRF) antenna and views the plasma through a small penetration in the centre of the Faraday shield. Initial measurements demonstrated that this technique is an effective way to measure the electron density profile in the edge gradient region. C1 PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543. RP HANSON, GR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 10 TC 12 Z9 14 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD DEC PY 1994 VL 36 IS 12 BP 2073 EP 2082 DI 10.1088/0741-3335/36/12/009 PG 10 WC Physics, Fluids & Plasmas SC Physics GA QA760 UT WOS:A1994QA76000009 ER PT J AU ADAMS, JM AGARICI, Y AGELADARAKIS, P ALPER, B ALTMANN, H ANDREW, P ALIARSHAD, S BAILEY, W BALET, B BARANOV, Y BARKER, P BARNSLEY, R BARONIAN, M BARTLETT, DV BELL, AC BENALI, G BERTOLINI, E BHATNAGAR, V BICKLEY, AJ BINDSLEV, H BLACKLER, K BOND, D BONICELLI, T BORRAS, K BOUCQUEY, P BRANDON, M BREGER, P BRELEN, H BREWERTON, WJ BROWN, T BUDD, T BURES, M BURTON, P BUSINARO, T BUTTGEREIT, H CALDWELLNICHOLS, C CAMPBELL, DJ CAMPLING, D CARD, P CECIL, F CELENTANO, G CHALLIS, CD CHIRON, D CHRISTIANSEN, J CHUILON, P CLAESEN, R CLEMENT, S COAD, JP COLOMBI, S COOKE, M COOPER, S CORDEY, JG COTTRELL, G COX, M CRAWLEY, P DACOSTA, O CUSACK, R DANTONA, G DAVIES, N DAVIES, SJ DAVIS, JJ DEESCH, H DEKSNIS, E DELIYANAKIS, N DINES, A DMITRENKO, SL DOBBING, J DOLGETTA, N DORLING, SE DOYLE, PG DUQUENOY, H EDWARDS, A EHRENBERG, J EKEDAHL, A ELEVANT, T ERENTS, SK ERIKSSON, LG FALTER, H FASOLI, A FECHNER, B FISCHER, B FISHPOOL, G FREILING, J FROGER, C FROISSARD, P FULLARD, K GADEBERG, M GALBIATI, L GARRIBBA, M GERSTEL, U GIANNELLA, R GIBSON, A GILL, RD GOULDING, R GONDHALEKAR, A GOODALL, D GORMEZANO, C GOTTARDI, NA GOWERS, C GRISOLIA, C GUO, H HAIGH, A HANCOCK, CJ HARBOUR, PJ HAWKES, NC HAWKES, NP HEMMERICH, JL HENDER, T HOEKZEMA, J HORTON, L HOW, J HOWARTH, PJ HOWMAN, A HUART, M HUTCHINSON, I HUGHES, TP HURD, F INGRAM, B IRVING, M ISHIDA, S JACQUINOT, J JAECKEL, H JAEGER, JF JARVIS, ON JENSEN, F JOHNSON, M JONES, EM JONES, LPDF JONES, TTC JUNGER, JF JUNIQUE, F KAYE, A KEEN, BE KEILHACKER, M KERNER, W KIDD, NG KONIG, R KUPSCHUS, P LAMALLE, P LASSER, R LAST, JR LAUROTARONI, L LAVIRON, C LAWSON, K LAZZARO, E LENNHOLM, M LINGERTAT, J LOMAS, P LOUGHLIN, M LOWRY, C LYADINA, E MAAS, AC MACKLIN, B MAGGI, CF MARCHESE, V MARCUS, F MART, J MARTIN, D MARTIN, T MATTHEWS, G MCBRYAN, H MCCORMICK, G MEIGS, A MILANI, S MONK, R MORGAN, P MURPHY, G NAVE, F NEWBERT, G NGUYEN, F NIELSEN, P NOLL, P OBERT, W OBRIEN, D OORD, E OSTROM, R OTTAVIANI, M PAPASTERGIOU, S PARAIL, VV PATEL, B PEACOCK, A PEACOCK, N PEARCE, RJM PERRY, C PICK, MA PLANCOULAINE, J POGUTSE, O POFFE, JP PORCELLI, F PORTE, L PRENTICE, R PUPPIN, S RADFORD, G RAIMONDI, T REICHLE, R RICHARDS, S RIGHI, E RIMINI, F ROLFE, A ROOKES, A ROSS, RT ROSSI, A ROSSI, L RUSS, R SADLER, G SAIBENE, G SALISBURY, M SANAZZARO, G SANTAGIUSTINA, A SARTORI, F SARTORI, R SAVRUKHIN, P SCHAFFER, M SCHILD, P SCHMID, M SCHUNKE, B SCOTT, SM SHARAPOV, S SHAW, RL SIBLEY, A SIMONINI, R SIPS, ACC SMEULDERS, P SMITH, R SOLDNER, F STAMP, M STANGEBY, P START, DF STEED, CA STORK, D STOTT, PE STUBBERFIELD, P SUMMERS, D SUMMERS, H SUVERKROPP, W SVENSSON, L SZABO, T TABELLINI, M TANGA, A TARONI, A TERELLA, C TESINI, A THOMAS, PR THOMPSON, E THOMSEN, K TUBBING, B VANDERBEKEN, H VANDERGOOT, E VAYAKIS, G VLASES, G VONHELLERMANN, M WADE, T WALKER, C WARD, D WATKINS, ML WATKINS, N WATSON, MJ WEBER, S WESSON, J WILSON, D WINKEL, T WOLF, R WOODWARD, C YOUNG, ID ZANNELLI, L ZORNIG, N ZWINGMANN, W AF ADAMS, JM AGARICI, Y AGELADARAKIS, P ALPER, B ALTMANN, H ANDREW, P ALIARSHAD, S BAILEY, W BALET, B BARANOV, Y BARKER, P BARNSLEY, R BARONIAN, M BARTLETT, DV BELL, AC BENALI, G BERTOLINI, E BHATNAGAR, V BICKLEY, AJ BINDSLEV, H BLACKLER, K BOND, D BONICELLI, T BORRAS, K BOUCQUEY, P BRANDON, M BREGER, P BRELEN, H BREWERTON, WJ BROWN, T BUDD, T BURES, M BURTON, P BUSINARO, T BUTTGEREIT, H CALDWELLNICHOLS, C CAMPBELL, DJ CAMPLING, D CARD, P CECIL, F CELENTANO, G CHALLIS, CD CHIRON, D CHRISTIANSEN, J CHUILON, P CLAESEN, R CLEMENT, S COAD, JP COLOMBI, S COOKE, M COOPER, S CORDEY, JG COTTRELL, G COX, M CRAWLEY, P DACOSTA, O CUSACK, R DANTONA, G DAVIES, N DAVIES, SJ DAVIS, JJ DEESCH, H DEKSNIS, E DELIYANAKIS, N DINES, A DMITRENKO, SL DOBBING, J DOLGETTA, N DORLING, SE DOYLE, PG DUQUENOY, H EDWARDS, A EHRENBERG, J EKEDAHL, A ELEVANT, T ERENTS, SK ERIKSSON, LG FALTER, H FASOLI, A FECHNER, B FISCHER, B FISHPOOL, G FREILING, J FROGER, C FROISSARD, P FULLARD, K GADEBERG, M GALBIATI, L GARRIBBA, M GERSTEL, U GIANNELLA, R GIBSON, A GILL, RD GOULDING, R GONDHALEKAR, A GOODALL, D GORMEZANO, C GOTTARDI, NA GOWERS, C GRISOLIA, C GUO, H HAIGH, A HANCOCK, CJ HARBOUR, PJ HAWKES, NC HAWKES, NP HEMMERICH, JL HENDER, T HOEKZEMA, J HORTON, L HOW, J HOWARTH, PJ HOWMAN, A HUART, M HUTCHINSON, I HUGHES, TP HURD, F INGRAM, B IRVING, M ISHIDA, S JACQUINOT, J JAECKEL, H JAEGER, JF JARVIS, ON JENSEN, F JOHNSON, M JONES, EM JONES, LPDF JONES, TTC JUNGER, JF JUNIQUE, F KAYE, A KEEN, BE KEILHACKER, M KERNER, W KIDD, NG KONIG, R KUPSCHUS, P LAMALLE, P LASSER, R LAST, JR LAUROTARONI, L LAVIRON, C LAWSON, K LAZZARO, E LENNHOLM, M LINGERTAT, J LOMAS, P LOUGHLIN, M LOWRY, C LYADINA, E MAAS, AC MACKLIN, B MAGGI, CF MARCHESE, V MARCUS, F MART, J MARTIN, D MARTIN, T MATTHEWS, G MCBRYAN, H MCCORMICK, G MEIGS, A MILANI, S MONK, R MORGAN, P MURPHY, G NAVE, F NEWBERT, G NGUYEN, F NIELSEN, P NOLL, P OBERT, W OBRIEN, D OORD, E OSTROM, R OTTAVIANI, M PAPASTERGIOU, S PARAIL, VV PATEL, B PEACOCK, A PEACOCK, N PEARCE, RJM PERRY, C PICK, MA PLANCOULAINE, J POGUTSE, O POFFE, JP PORCELLI, F PORTE, L PRENTICE, R PUPPIN, S RADFORD, G RAIMONDI, T REICHLE, R RICHARDS, S RIGHI, E RIMINI, F ROLFE, A ROOKES, A ROSS, RT ROSSI, A ROSSI, L RUSS, R SADLER, G SAIBENE, G SALISBURY, M SANAZZARO, G SANTAGIUSTINA, A SARTORI, F SARTORI, R SAVRUKHIN, P SCHAFFER, M SCHILD, P SCHMID, M SCHUNKE, B SCOTT, SM SHARAPOV, S SHAW, RL SIBLEY, A SIMONINI, R SIPS, ACC SMEULDERS, P SMITH, R SOLDNER, F STAMP, M STANGEBY, P START, DF STEED, CA STORK, D STOTT, PE STUBBERFIELD, P SUMMERS, D SUMMERS, H SUVERKROPP, W SVENSSON, L SZABO, T TABELLINI, M TANGA, A TARONI, A TERELLA, C TESINI, A THOMAS, PR THOMPSON, E THOMSEN, K TUBBING, B VANDERBEKEN, H VANDERGOOT, E VAYAKIS, G VLASES, G VONHELLERMANN, M WADE, T WALKER, C WARD, D WATKINS, ML WATKINS, N WATSON, MJ WEBER, S WESSON, J WILSON, D WINKEL, T WOLF, R WOODWARD, C YOUNG, ID ZANNELLI, L ZORNIG, N ZWINGMANN, W TI FIRST RESULTS WITH THE MODIFIED JET - THE JET TEAM SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 21st European Conference on Controlled Fusion and Plasma Physics CY JUN 27-JUL 01, 1994 CL MONTPELLIER, FRANCE SP EUROPEAN PHYS SOC, PLASMA PHYS DIV ID ITER AB JET was extensively modified in the 1992/93 shutdown. The new pumped divertor and many new systems were brought into operation early in 1994. Operations have progressed to 4MA plasma current and, with substantial additional heating, H-mode confinement results confirm the expected scaling. The high power handling capability of the pumped divertor with sweeping is estimated at 20MW for 20s. H-mode plasmas have large Type I ELMs. With lower hybrid heating alone, 2MA full current drive has been achieved with good efficiency, with ICRF power, effective heating and direct electron heating have been demonstrated. C1 UKAEA,DIDCOT,OXON,ENGLAND. UNIV LEICESTER,LEICESTER,LEICS,ENGLAND. CEA,CADARACHE,FRANCE. UNIV ESSEX,COLCHESTER,ESSEX,ENGLAND. UNIV BIRMINGHAM,BIRMINGHAM,W MIDLANDS,ENGLAND. CFP,MILAN,ITALY. UKAEA,CULHAM LAB,ABINGDON,OXON,ENGLAND. AF IOFFE PHYS TECH INST,ST PETERSBURG,RUSSIA. UNIV OXFORD,INST MATH,OXFORD,ENGLAND. MIT,BOSTON,MA. ROYAL INST TECHNOL,STOCKHOLM,SWEDEN. UNIV LONDON,IMPERIAL COLL,LONDON,ENGLAND. MAX PLANCK INST PLASMA PHYS,GARCHING,GERMANY. JAPAN ATOM ENERGY RES INST,NAKA FUS RES LAB,NAKA,IBARAKI 31101,JAPAN. FOM,INST PLASMAFYS,NIEUWEGEIN,NETHERLANDS. UNIV MILAN,DIPARTIMENTO FIS,MILAN,ITALY. GEN ATOM CO,SAN DIEGO,CA. ECOLE POLYTECH FED LAUSANNE,LAUSANNE,SWITZERLAND. UNIV STRATHCLYDE,GLASGOW,LANARK,SCOTLAND. UNIV TORONTO,INST AEROSP STUDIES,TORONTO,ON,CANADA. LNETI,SACAVEM,PORTUGAL. OAK RIDGE NATL LAB,OAK RIDGE,TN. UNIV QUEBEC,INRS ENERGIEET MAT,ST FOY,PQ G1V 2M3,CANADA. COLORADO SCH MINES,GOLDEN,CO 80401. UNIV LONDON,ROYAL HOLLOWAY COLL,LONDON,ENGLAND. RP ADAMS, JM (reprint author), JET JOINT UNDERTAKING,ABINGDON OX14 3EA,OXON,ENGLAND. RI Hutchinson, Ian/D-1136-2009; Nave, Maria/A-5581-2013 OI Hutchinson, Ian/0000-0003-4276-6576; Nave, Maria/0000-0003-2078-6584 NR 5 TC 0 Z9 0 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD DEC PY 1994 VL 36 IS 12B SU S BP B39 EP B53 PG 15 WC Physics, Fluids & Plasmas SC Physics GA QB977 UT WOS:A1994QB97700004 ER PT J AU GOLDSTON, RJ BATHA, SH BULMER, RH HILL, DN HYATT, AW JARDIN, SC LEVINTON, FM KAYE, SM KESSEL, CE LAZARUS, EA MANICKAM, FJ NEILSON, GH NEVINS, WM PERKINS, LJ REWOLDT, G THOMASSEN, KI ZARNSTORFF, MC AF GOLDSTON, RJ BATHA, SH BULMER, RH HILL, DN HYATT, AW JARDIN, SC LEVINTON, FM KAYE, SM KESSEL, CE LAZARUS, EA MANICKAM, FJ NEILSON, GH NEVINS, WM PERKINS, LJ REWOLDT, G THOMASSEN, KI ZARNSTORFF, MC TI ADVANCED TOKAMAK PHYSICS - STATUS AND PROSPECTS SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 21st European Conference on Controlled Fusion and Plasma Physics CY JUN 27-JUL 01, 1994 CL MONTPELLIER, FRANCE SP EUROPEAN PHYS SOC, PLASMA PHYS DIV ID DIII-D TOKAMAK; CURRENT DRIVE; IMPROVED CONFINEMENT; ENERGY CONFINEMENT; BOOTSTRAP CURRENT; MODE CONFINEMENT; CURRENT PROFILE; BETA; PLASMAS; JET AB Experimental and theoretical results from around the world point to the possibility of high confinement, high-beta, and high-bootstrap-fraction steady-state tokamak operating modes. These modes of operation, if fully developed and extended to steady-state, could lead to much less expensive tokamak demonstration power reactors and to a significantly reduced cost-of-electricity from fusion, as compared to projections based on low-beta(N), pulsed operating modes. Present results have clear implications in the areas of particle control, plasma shaping, and current-profile control. Thus they have strongly influenced the design of the steady-state advanced tokamak TPX([1]), which has the mission to combine the best results from present experiments and extend them to steady-state. These results also have important implications for follow-up tests in ITER([2]), which have the goal of studying advanced-tokamak operation in an ignited plasma, as well as for the eventual configuration of an advanced-tokamak fusion reactor. C1 FUS PHYS & TECHNOL,TORRANCE,CA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. GEN ATOM CO,SAN DIEGO,CA. OAK RIDGE NATL LAB,OAK RIDGE,TN. RP GOLDSTON, RJ (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. RI Jardin, Stephen/E-9392-2010 NR 89 TC 42 Z9 42 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD DEC PY 1994 VL 36 IS 12B SU S BP B213 EP B227 DI 10.1088/0741-3335/36/12B/018 PG 15 WC Physics, Fluids & Plasmas SC Physics GA QB977 UT WOS:A1994QB97700019 ER PT J AU STRACHAN, JD ADLER, H BARNES, CW BATHA, S BELL, MG BELL, R BITTER, M BRETZ, NL BUDNY, R BUSH, CE CAORLIN, M CHANG, Z DARROW, DS DUONG, H DURST, R EFTHIMION, PC ERNST, D FISHER, R FONCK, RJ FREDRICKSON, E GREK, B GRISHAM, LR HAMMETT, G HAWRYLUK, RJ HEIDBRINK, W HERRMANN, HW HILL, KW HOSEA, J HSUAN, H JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC KUGEL, H LAM, NT LEBLANC, B LEVINTON, FM MACHUZAK, J MANSFIELD, DK MAZZUCATO, E MAJESKI, R MARMAR, E MCCHESNEY, J MCGUIRE, KM MCKEE, G MEADE, DM MEDLEY, SS MIKKELSEN, DR MUELLER, D MURAKAMI, M NAZIKIAN, R OSAKABE, M OWENS, DK PARK, H PAUL, SF PETROV, M PHILLIPS, CK RAMSEY, AT REDI, MH ROBERTS, D ROGERS, J ROQUEMORE, AL RUSKOV, E SABBAGH, SA SASAO, M SCHILLING, G SCHIVELL, J SCHMIDT, GL SCOTT, SD SKINNER, CH SNIPES, JA STEVENS, J STEVENSOM, T STRATTON, BC SYNAKOWSKI, E TAYLOR, G TERRY, JL VONHALLE, A VONGOELER, S WILGEN, JB WILSON, JR WONG, KL WURDEN, GA YAMADA, M YOUNG, KM ZARNSTORFF, MC ZWEBEN, SJ AF STRACHAN, JD ADLER, H BARNES, CW BATHA, S BELL, MG BELL, R BITTER, M BRETZ, NL BUDNY, R BUSH, CE CAORLIN, M CHANG, Z DARROW, DS DUONG, H DURST, R EFTHIMION, PC ERNST, D FISHER, R FONCK, RJ FREDRICKSON, E GREK, B GRISHAM, LR HAMMETT, G HAWRYLUK, RJ HEIDBRINK, W HERRMANN, HW HILL, KW HOSEA, J HSUAN, H JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC KUGEL, H LAM, NT LEBLANC, B LEVINTON, FM MACHUZAK, J MANSFIELD, DK MAZZUCATO, E MAJESKI, R MARMAR, E MCCHESNEY, J MCGUIRE, KM MCKEE, G MEADE, DM MEDLEY, SS MIKKELSEN, DR MUELLER, D MURAKAMI, M NAZIKIAN, R OSAKABE, M OWENS, DK PARK, H PAUL, SF PETROV, M PHILLIPS, CK RAMSEY, AT REDI, MH ROBERTS, D ROGERS, J ROQUEMORE, AL RUSKOV, E SABBAGH, SA SASAO, M SCHILLING, G SCHIVELL, J SCHMIDT, GL SCOTT, SD SKINNER, CH SNIPES, JA STEVENS, J STEVENSOM, T STRATTON, BC SYNAKOWSKI, E TAYLOR, G TERRY, JL VONHALLE, A VONGOELER, S WILGEN, JB WILSON, JR WONG, KL WURDEN, GA YAMADA, M YOUNG, KM ZARNSTORFF, MC ZWEBEN, SJ TI DEUTERIUM AND TRITIUM EXPERIMENTS ON TFTR SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 21st European Conference on Controlled Fusion and Plasma Physics CY JUN 27-JUL 01, 1994 CL MONTPELLIER, FRANCE SP EUROPEAN PHYS SOC, PLASMA PHYS DIV AB Three campaigns, prior to July 1994, attempted to increase the fusion power in DT plasmas on the Tokamak Fusion Test Reactor [TFTR]. The first campaign was dedicated to obtaining >5 MW of fusion power while avoiding MHD events similar to the JET X-event. The second was aimed at producing maximum fusion power irrespective of proximity to MHD limits, and achieved 9 MW limited by a disruption. The third campaign increased the energy confinement time using lithium pellet conditioning while raising the ratio of alpha heating to beam heating. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM. FUS PHYS & TECHNOL,TORRANCE,CA. OAK RIDGE NATL LAB,OAK RIDGE,TN. UNIV WISCONSIN,MADISON,WI. GEN ATOM CO,SAN DIEGO,CA. MIT,CAMBRIDGE,MA. UNIV CALIF IRVINE,IRVINE,CA. NATL INST FUS SCI,NAGOYA,AICHI,JAPAN. AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA. COLUMBIA UNIV,NEW YORK,NY. RP STRACHAN, JD (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. RI Sabbagh, Steven/C-7142-2011; Hammett, Gregory/D-1365-2011; Wurden, Glen/A-1921-2017; Ernst, Darin/A-1487-2010; Yamada, Masaaki/D-7824-2015 OI Hammett, Gregory/0000-0003-1495-6647; Wurden, Glen/0000-0003-2991-1484; Ernst, Darin/0000-0002-9577-2809; Yamada, Masaaki/0000-0003-4996-1649 NR 8 TC 12 Z9 12 U1 1 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD DEC PY 1994 VL 36 IS 12B SU S BP B3 EP B15 DI 10.1088/0741-3335/36/12B/001 PG 13 WC Physics, Fluids & Plasmas SC Physics GA QB977 UT WOS:A1994QB97700002 ER PT J AU PRYDE, PR BRADLEY, DJ AF PRYDE, PR BRADLEY, DJ TI THE GEOGRAPHY OF RADIOACTIVE CONTAMINATION IN THE FORMER USSR SO POST-SOVIET GEOGRAPHY LA English DT Article ID SOVIET; CHERNOBYL AB A detailed survey of the location and scope of radionuclide contamination in the former USSR examines the character and spatial patterns of such contamination by source-e.g., commercial and military reactor operation (including reactors on submarines and icebreakers); uranium mining and enrichment; plutonium production; nuclear waste storage and disposal; and ''peaceful'' nuclear explosions and nuclear weapons tests. Attention also is focused on updating the situation at sites known to have sustained some of the most severe radionuclide contamination-e.g., Chornobyl' (Chernobyl') and adjacent areas; Mayak, Tomsk-7, and Krasnoyarsk-26; Novaya Zemlya; the Barents and Kara Seas; Lake Ladoga; and Semipalatinsk in Kazakhstan. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP PRYDE, PR (reprint author), SAN DIEGO STATE UNIV, DEPT GEOG, SAN DIEGO, CA 92182 USA. NR 56 TC 7 Z9 7 U1 0 U2 2 PU V H WINSTON & SONS INC PI SILVER SPRING PA 7961 EASTERN AVE, SILVER SPRING, MD 20910 SN 1060-5851 J9 POST-SOV GEOGR JI Post-Sov. Geogr. PD DEC PY 1994 VL 35 IS 10 BP 557 EP 593 PG 37 WC Geography SC Geography GA QB960 UT WOS:A1994QB96000001 ER PT J AU FARHAR, BC AF FARHAR, BC TI THE POLLS - POLL TRENDS - PUBLIC-OPINION ABOUT ENERGY SO PUBLIC OPINION QUARTERLY LA English DT Article RP FARHAR, BC (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO, USA. NR 10 TC 5 Z9 5 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0033-362X J9 PUBLIC OPIN QUART JI Public Opin. Q. PD WIN PY 1994 VL 58 IS 4 BP 603 EP 632 DI 10.1086/269450 PG 30 WC Communication; Political Science; Social Sciences, Interdisciplinary SC Communication; Government & Law; Social Sciences - Other Topics GA QH301 UT WOS:A1994QH30100007 ER PT J AU BURTIS, CA GEARY, TD AF BURTIS, CA GEARY, TD TI GLOSSARY OF BIOANALYTICAL NOMENCLATURE .1. GENERAL TERMINOLOGY, BODY-FLUIDS, ENZYMOLOGY, IMMUNOLOGY - (IUPAC RECOMMENDATIONS 1994) SO PURE AND APPLIED CHEMISTRY LA English DT Article AB Many disciplines are involved in the practice of clinical laboratory medicine, with each having its own set of technical terminology. Consequently, the terminology used in the clinical laboratory is often vague, inexact, and, in some cases, even in discord with conventional and officially approved terminology. In order to help rectify this situation, a general set of bioanalytical definitions has been compiled and collated from documents from several national and international organizations with the emphasis on those prepared by the International Federation of Clinical Chemistry (IFCC), the International Union of Pure and Applied Chemistry (IUPAC), and the International Union of Biochemistry Biochemistry (IUB). References are included For each definition included. This document includes sections on General Terminology, Body Fluids, Enzymology, and Immunology. Other topics will be included in subsequent documents. It is hoped that this set of bioanalytical definitions will be useful to the practitioners of clinical chemistry and will foster improved communication and understanding among them. C1 INST MED & VET SCI,ADELAIDE,SA 5000,AUSTRALIA. RP BURTIS, CA (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 26 TC 3 Z9 3 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0033-4545 J9 PURE APPL CHEM JI Pure Appl. Chem. PD DEC PY 1994 VL 66 IS 12 BP 2587 EP 2604 DI 10.1351/pac199466122587 PG 18 WC Chemistry, Multidisciplinary SC Chemistry GA PZ230 UT WOS:A1994PZ23000013 ER PT J AU RENSCHLER, CL GILL, JT WALKO, RJ ASHLEY, CS SHEPODD, TJ REED, ST MALONE, GM LEONARD, LE ELLEFSON, RE CLOUGH, RL AF RENSCHLER, CL GILL, JT WALKO, RJ ASHLEY, CS SHEPODD, TJ REED, ST MALONE, GM LEONARD, LE ELLEFSON, RE CLOUGH, RL TI SOLID-STATE RADIOLUMINESCENT LIGHTING SO RADIATION PHYSICS AND CHEMISTRY LA English DT Article ID SCINTILLATORS AB We have demonstrated novel types of tritium-powered, solid-phase radioluminescent (RL) light sources. These lights include: (1) all-organic formulations comprised of polystyrene and fluorescent organic dyes; (2) polydimethylsiloxane-based systems incorporating inorganic phosphors; and (3) inorganic aerogel-based systems doped with phosphors. Three principal design considerations for these new RL lights are described. These include: (1) incorporation of tritium into the solid matrix; (2) molecular engineering to maximize light-output efficiency; and (3) strategies for increasing longevity. The advanced RL lights, which are of interest due to potential advantages in efficiency, brightness and safety, are being developed for emergency lighting uses and for battery and lighting applications in remote locations. C1 SANDIA NATL LABS,LIVERMORE,CA 94551. US DOE,OFF ENVIRONM RESTORAT & WASTE MANAGEMENT,WASHINGTON,DC. EG&G MOUND APPL TECHNOL,MIAMISBURG,OH 45343. SANDIA NATL LABS,DEPT ORGAN MAT OLRG 1811,MS 0368,ALBUQUERQUE,NM 87185. NR 39 TC 4 Z9 4 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0146-5724 J9 RADIAT PHYS CHEM JI Radiat. Phys. Chem. PD DEC PY 1994 VL 44 IS 6 BP 629 EP 644 DI 10.1016/0969-806X(94)90223-2 PG 16 WC Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical SC Chemistry; Nuclear Science & Technology; Physics GA PA926 UT WOS:A1994PA92600012 ER PT J AU WEISS, AH OTTEWITTE, EH AUGENSTEIN, BW DENISON, AB GHOSH, VJ JACOBSEN, FM KRISTIAKOVA, K LYNN, KG NIEMINEN, RM RITLEY, KA SIMPSON, PJ AF WEISS, AH OTTEWITTE, EH AUGENSTEIN, BW DENISON, AB GHOSH, VJ JACOBSEN, FM KRISTIAKOVA, K LYNN, KG NIEMINEN, RM RITLEY, KA SIMPSON, PJ TI SUMMARY OF THE 5TH INTERNATIONAL WORKSHOP ON SLOW POSITRON BEAM TECHNIQUES FOR SOLIDS AND SURFACES SO RADIATION PHYSICS AND CHEMISTRY LA English DT Editorial Material RP WEISS, AH (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. RI Nieminen, Risto/I-5573-2012 OI Nieminen, Risto/0000-0002-1032-2711 NR 10 TC 1 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0146-5724 J9 RADIAT PHYS CHEM JI Radiat. Phys. Chem. PD DEC PY 1994 VL 44 IS 6 BP 665 EP 670 DI 10.1016/0969-806X(94)90228-3 PG 6 WC Chemistry, Physical; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical SC Chemistry; Nuclear Science & Technology; Physics GA PA926 UT WOS:A1994PA92600017 ER PT J AU WILSON, WE AF WILSON, WE TI THE STOCHASTICS OF THE POSITIVE-ION PENUMBRA SO RADIATION RESEARCH LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; WATER-VAPOR; HEAVY-ION; IONIZATION; TISSUE; TRACKS AB Statistical analysis of Monte Carlo simulations of positive ion track structure is presented for 1 MeV protons passing outside an absorbing region of interest. Energy deposition and production of ionization within the region occur only by delta-ray transport from the ion's path. Depositions in spherical absorber regions of 2 to 100 nm diameter in unit density tissue were scored. It is shown that production of delta rays sufficiently energetic to reach the region is infrequent and the delta rays are therefore relatively far apart along the ion path compared to their average range. The probability for any delta-ray energy deposition in a distant site is small and proportional to the solid angle intercepted by the site. The functional dependence of the frequency density distributions in energy imparted and in ionization number, conditional on there being some interaction, is approximately exponential, and the first and second moments of the distributions are largely independent of distance from the ion path. These findings confirm similar conclusions from experimental measurements on the track structure of germanium, iron and uranium ions. RP WILSON, WE (reprint author), PACIFIC NW LAB, NUCL CHEM SECT, POB 999, RICHLAND, WA 99352 USA. NR 27 TC 23 Z9 23 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 DEC PY 1994 VL 140 IS 3 BP 375 EP 381 DI 10.2307/3579115 PG 7 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA PV082 UT WOS:A1994PV08200010 PM 7972690 ER PT J AU HARRISON, FL ANDERSON, SL AF HARRISON, FL ANDERSON, SL TI EFFECTS OF CHRONIC IRRADIATION ON THE REPRODUCTIVE SUCCESS OF THE POLYCHAETE WORM, NEANTHES ARENACEODENTATA SO RADIATION RESEARCH LA English DT Article ID MEDAKA ORYZIAS-LATIPES; TEST SYSTEM; MUTAGENESIS; CHROMIUM; TARGET; FISH AB Effects of lifetime exposure to chronic irradiation on reproductive success were assessed for laboratory populations of Neanthes arenaceodentata. Exposure was initiated upon the spawning of the parental (P-1) female and was terminated upon spawning of the first filial (F-1) generation female; broods from the F-1 pairs were sacrificed before hatching occurred. Groups of worms in the experiments received either no radiation (controls) or 0.19, 2.1 or 17 mGy h(-1). The total dose received was either background or approximately 0.55, 6.5 or 54 Gy, respectively. The mean number of embryos in the broods from the F-1 females exposed to 17 mGy h(-1) was statistically significantly different from the mean number of embryos from control females; however, the mean number of embryos in the broods from the F-1 females exposed to 0.19 and 2.1 mGy h(-1) was not significantly different from the mean number from control females. For all the radiation-exposed groups, there was a statistically significant reduction in the number and percentage of live embryos in the broods from the F-1 pairs as well as a statistically significant increase in the numbers and percentages of abnormal embryos. Results on embryo abnormalities and mortalities indicate that dominant- and recessive-lethal mutations were most likely induced in the germ cells and that these mutations had an adverse effect on reproductive success by affecting the survival of early-life stages. Except for pairs exposed to 17 mGy h(-1), there was no evidence of gamete killing or reduced fertilization success, because the number of developing embryos in the broods did not decrease with increased dose. Data for the estimated hatch number and actual hatch number indicated that doses as low as 0.19 mGy h(-1) can reduce significantly the number of larvae that hatch when lifetime doses are given. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. RP HARRISON, FL (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV HLTH & ECOL ASSESSMENT,LIVERMORE,CA 94550, USA. NR 43 TC 5 Z9 5 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 DEC PY 1994 VL 140 IS 3 BP 401 EP 409 DI 10.2307/3579119 PG 9 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA PV082 UT WOS:A1994PV08200014 PM 7972694 ER PT J AU MEECHAN, PJ HARAF, DJ DIAMOND, AM GRDINA, DJ AF MEECHAN, PJ HARAF, DJ DIAMOND, AM GRDINA, DJ TI VARYING LEVELS OF RADIOPROTECTION FROM THE EFFECTS OF JANUS NEUTRONS IN REPAIR-DEFICIENT XRS-5 HAMSTER-CELLS TREATED WITH AZACYTIDINE SO RADIATION RESEARCH LA English DT Note ID RAY-SENSITIVE MUTANTS; DNA-DAMAGING AGENTS; OVARY CELLS; RADIORESISTANT DERIVATIVES; CHINESE; LINE; EXPRESSION; CISPLATIN; RADIATION; SURVIVAL AB A series of cell lines have been generated from the radiation-sensitive Chinese hamster ovary line xrs-5 by treatment with azacytidine. Several of these lines have been shown to be resistant to gamma radiation. Survival curves have been generated for several of these lines and the parental lines after exposure to 0 to 5 Gy of JANUS neutrons in the presence or absence of a 30-min pretreatment with the aminothiol radioprotector WR-1065. These studies were performed to determine whether the parental xrs-5 cell line was radioresistant to exposure to JANUS neutrons and whether reversion to a neutron-resistant phenotype correlated with recovery of aminothiol radioprotection. Exposure to 4 mM WR-1065 enhanced survival after exposure to neutron radiation for most ''revertant'' lines, although the increase in survival varied. The xrs-5 cell line was sensitive to JANUS neutrons and showed no protection by WR-1065. These data indicate that xrs-5 cells are also sensitive to neutron radiation, that azacytidine-induced revertants for gamma-ray survival demonstrate the wildtype phenotype for survival after neutron exposure, and that the gene product that is defective is responsible for repairing only a small portion of neutron-induced damage. C1 NO ILLINOIS UNIV,DEPT BIOL SCI,DE KALB,IL 60115. UNIV CHICAGO,DEPT RADIAT & CELLULAR ONCOL,CHICAGO,IL 60637. ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. FU NCI NIH HHS [CA-37435]; NCRR NIH HHS [SO7 RR07176] NR 18 TC 6 Z9 6 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 DEC PY 1994 VL 140 IS 3 BP 437 EP 440 DI 10.2307/3579124 PG 4 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA PV082 UT WOS:A1994PV08200019 PM 7526412 ER PT J AU TARANENKO, NI TANG, K ALLMAN, SL CHANG, LY CHEN, CH AF TARANENKO, NI TANG, K ALLMAN, SL CHANG, LY CHEN, CH TI 3-AMINOPICOLINIC AID AS A MATRIX FOR LASER-DESORPTION MASS-SPECTROMETRY OF BIOPOLYMERS SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID IONIZATION; OLIGONUCLEOTIDES; ACID AB 3-Aminopicolinic acid (3-APA) was tested and feued to be a useful matrix for matrix-assisted laser desorption/ionization of DNA and protein. Single-stranded DNA segments of 150-mer and double-stranded DNA of 246 base pairs were successfully detected by using 3-APA as an ultraviolet-absorbing matrix in a linear time-of-flight mass spectrometer. In the case of the double-stranded DNA, only parent ions corresponding to single-stranded DNA were observed. The comparison with 3-hydroxypicolinic acid and picolinic acid matrices is discussed. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Allman, Steve/A-9121-2011; Tang, Kai/A-2194-2011 OI Allman, Steve/0000-0001-6538-7048; NR 16 TC 24 Z9 24 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PD DEC PY 1994 VL 8 IS 12 BP 1001 EP 1006 DI 10.1002/rcm.1290081219 PG 6 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA QF622 UT WOS:A1994QF62200017 PM 7696697 ER PT J AU JONES, DW ONEILL, RV AF JONES, DW ONEILL, RV TI DEVELOPMENT POLICIES, RURAL LAND-USE, AND TROPICAL DEFORESTATION SO REGIONAL SCIENCE AND URBAN ECONOMICS LA English DT Article ID DEGRADATION; FOREST AB A two-sector economy has a central city linked to a Thunen-like rural sector by a Harris-Todaro labor-market clearing mechanism. The government collects a tax to pay for urban manufacturing infrastructure and rural transportation infrastructure. Additions to the urban infrastructure reduce the area under cultivation, reducing pressure on frontier forests; rural wages rise and urban unemployment falls; the endogenous tax rate rises. Transportation improvements move urban unemployed into agriculture, raise rural wages, and expand the cultivated area causing deforestation along frontiers; the tax rate falls, benefiting fixed-wage urban workers. Coalitions of interest groups are identified for several types of development policy. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP JONES, DW (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,BLDG 4500N,MS-6205,POB 2008,OAK RIDGE,TN 37831, USA. NR 20 TC 10 Z9 10 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-0462 J9 REG SCI URBAN ECON JI Reg. Sci. Urban Econ. PD DEC PY 1994 VL 24 IS 6 BP 753 EP 771 DI 10.1016/0166-0462(94)90010-8 PG 19 WC Economics; Environmental Studies; Urban Studies SC Business & Economics; Environmental Sciences & Ecology; Urban Studies GA PZ925 UT WOS:A1994PZ92500005 ER PT J AU LI, X HUANG, YL FLESCH, GD NG, CY AF LI, X HUANG, YL FLESCH, GD NG, CY TI A DIFFERENTIAL RETARDING POTENTIAL METHOD FOR IMPROVING ION-BEAM KINETIC-ENERGY RESOLUTION SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP LI, X (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 16 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3724 EP 3728 DI 10.1063/1.1145217 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200020 ER PT J AU VODINH, T STOKES, DL AF VODINH, T STOKES, DL TI SURFACE-ENHANCED RAMAN OPTICAL-DATA STORAGE - A NEW OPTICAL MEMORY WITH 3-DIMENSIONAL DATA-STORAGE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ELECTROMAGNETIC THEORY; SCATTERING ANALYSIS; SILVER ELECTRODE; SPECTROMETRY; MOLECULES; PARTICLES; SUBSTRATE; SERS RP VODINH, T (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,ADV MONITORING DEV GRP,POB 2008,OAK RIDGE,TN 37831, USA. NR 29 TC 2 Z9 2 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3766 EP 3770 DI 10.1063/1.1144504 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200028 ER PT J AU HEARNE, GR PASTERNAK, MP TAYLOR, RD AF HEARNE, GR PASTERNAK, MP TAYLOR, RD TI FE-57 MOSSBAUER-SPECTROSCOPY IN A DIAMOND-ANVIL CELL AT VARIABLE HIGH-PRESSURES AND CRYOGENIC TEMPERATURES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID FE2O3 C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP HEARNE, GR (reprint author), TEL AVIV UNIV,SCH PHYS & ASTRON,RAMAT AVIV,IL-69978 TEL AVIV,ISRAEL. NR 15 TC 29 Z9 29 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3787 EP 3792 DI 10.1063/1.1144508 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200033 ER PT J AU DANTSKER, E KOELLE, D MIKLICH, AH NEMETH, DT LUDWIG, F CLARKE, J LONGO, JT VINETSKIY, V AF DANTSKER, E KOELLE, D MIKLICH, AH NEMETH, DT LUDWIG, F CLARKE, J LONGO, JT VINETSKIY, V TI HIGH-T-C 3-AXIS DC SQUID MAGNETOMETER FOR GEOPHYSICAL APPLICATIONS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article C1 UNIV CALIF BERKELEY, DIV SCI MAT, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. CONDUCTUS INC, SUNNYVALE, CA 94086 USA. RP UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RI Koelle, Dieter/E-5111-2011 NR 14 TC 15 Z9 16 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0034-6748 EI 1089-7623 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3809 EP 3813 DI 10.1063/1.1145169 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200037 ER PT J AU VANDERVOORT, KG ZASADZINSKI, RK GALICIA, GG CRABTREE, GW AF VANDERVOORT, KG ZASADZINSKI, RK GALICIA, GG CRABTREE, GW TI FURTHER MEASUREMENTS OF THE TEMPERATURE-DEPENDENCE OF THE VOLTAGE RESPONSE OF PIEZOELECTRIC TUBE SCANNER PZT-5A FOR USE IN SCANNING TUNNELING MICROSCOPES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Note C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCTIV,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. IIT,CHICAGO,IL 60616. RP VANDERVOORT, KG (reprint author), WESTERN CAROLINA UNIV,DEPT CHEM & PHYS,CULLOWHEE,NC 28723, USA. NR 2 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3862 EP 3863 DI 10.1063/1.1145180 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200049 ER PT J AU CHAIKEN, A HONEA, EC RUPPRECHT, WS TORRES, S MICHEL, RP AF CHAIKEN, A HONEA, EC RUPPRECHT, WS TORRES, S MICHEL, RP TI CRYOGENICALLY COOLED MULTIPLE-SUBSTRATE HOLDER FOR HIGH-VACUUM SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Note C1 WS RUPPRECHT CONSULTING CO,FREMONT,CA 94539. RP CHAIKEN, A (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD DEC PY 1994 VL 65 IS 12 BP 3870 EP 3870 DI 10.1063/1.1145184 PG 1 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA PX392 UT WOS:A1994PX39200053 ER PT J AU MACKINNON, RJ SULLIVAN, TM AF MACKINNON, RJ SULLIVAN, TM TI A REVIEW OF GWSCREEN VERSION-2.0, WITH AN EMPHASIS ON PHYSICAL AND CHEMICAL PROCESSES IMPORTANT TO GROUND-WATER PATHWAY ASSESSMENTS SO RISK ANALYSIS LA English DT Software Review ID SOIL; MOISTURE; MOVEMENT RP MACKINNON, RJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 24 TC 1 Z9 1 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD DEC PY 1994 VL 14 IS 6 BP 1109 EP 1121 DI 10.1111/j.1539-6924.1994.tb00083.x PG 13 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA PZ760 UT WOS:A1994PZ76000035 ER PT J AU MOSKOWITZ, PD AF MOSKOWITZ, PD TI RISK CALC SO RISK ANALYSIS LA English DT Software Review RP MOSKOWITZ, PD (reprint author), BROOKHAVEN NATL LAB,BIOMED & ENVIRONM ASSESSMENT GRP,UPTON,NY 11973, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD DEC PY 1994 VL 14 IS 6 BP 1123 EP 1123 PG 1 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA PZ760 UT WOS:A1994PZ76000036 ER PT J AU MERRILL, SJ DEBOER, RJ PERELSON, AS AF MERRILL, SJ DEBOER, RJ PERELSON, AS TI DEVELOPMENT OF THE T-CELL REPERTOIRE - CLONE SIZE DISTRIBUTION SO ROCKY MOUNTAIN JOURNAL OF MATHEMATICS LA English DT Article; Proceedings Paper CT 20th Midwest ODE Meeting, Celebrating Professor Paul Waltmans Birthday CY DEC 05-06, 1991 CL UNIV IOWA, IOWA CITY, IA HO UNIV IOWA ID LYMPHOCYTES-T; EXPANSION AB The development and maintenance of the T lymphocyte repertoire, which determines which antigens will elicit an immune response, involve a complicated learning process involving internal interactions and external (environmental) factors. The dynamics are not unlike that of thousands of nearly identical competing species. This paper examines the distribution of clone (species) populations, how it is created and how it is maintained. C1 MARQUETTE UNIV,DEPT MATH STAT & COMP SCI,MILWAUKEE,WI 53233. UNIV UTRECHT,3584 CH UTRECHT,NETHERLANDS. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RI De Boer, Rob/B-6050-2011 OI De Boer, Rob/0000-0002-2130-691X NR 16 TC 6 Z9 6 U1 0 U2 0 PU ROCKY MT MATH CONSORTIUM PI TEMPE PA ARIZ STATE UNIV, DEPT MATH, TEMPE, AZ 85281 SN 0035-7596 J9 ROCKY MT J MATH JI Rocky Mt. J. Math. PD WIN PY 1994 VL 24 IS 1 BP 213 EP 231 PG 19 WC Mathematics SC Mathematics GA NG069 UT WOS:A1994NG06900015 ER PT J AU MERRITT, RH KOHL, HC AF MERRITT, RH KOHL, HC TI VEGETATIVE AND FLOWERING RESPONSES OF MIMULUS TO PHOTOPERIOD AND TEMPERATURE SO SCIENTIA HORTICULTURAE LA English DT Note DE MIMULUS X HYBRIDUS; PHOTOPERIOD; TEMPERATURE AB Growth chamber studies were conducted to determine growth and development responses of mimulus, cultivar 'Royal Velvet', to photoperiods of 8 and 16 h and an 8 h day temperature of 27 degrees C and a 16 h night temperature of either 5 degrees C or 18 degrees C. The 16 h photoperiod plants bloomed in 69 and 92 days from seeding at night temperatures of 18 degrees C and 5 degrees C, respectively. Some floral development also occurred at the 8 h photoperiod and 18 degrees C night temperature 115 days from seeding. No flowering occurred at the 8 h photoperiod and 5 degrees C night temperature. Plants grew in a rosetted fashion under the 8 h photoperiod and in an elongated growth pattern in the 16-h photoperiods. C1 LAWRENCE LIVERMORE NATL LAB,DEPT ENVIRONM HORT,DAVIS,CA 95616. RP MERRITT, RH (reprint author), RUTGERS STATE UNIV,COOK COLL,NEW JERSEY AGR EXPT STN,DEPT PLANT SCI,POB 231,NEW BRUNSWICK,NJ 08903, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-4238 J9 SCI HORTIC-AMSTERDAM JI Sci. Hortic. PD DEC PY 1994 VL 60 IS 1-2 BP 139 EP 142 DI 10.1016/0304-4238(94)90068-X PG 4 WC Horticulture SC Agriculture GA QD132 UT WOS:A1994QD13200013 ER PT J AU MARGOLIS, SB AF MARGOLIS, SB TI RESONANT MODE INTERACTIONS AND THE BIFURCATION OF COMBUSTION-DRIVEN ACOUSTIC-OSCILLATIONS IN RESONANCE TUBES SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE ACOUSTIC OSCILLATIONS; BIFURCATION; DOUBLE EIGENVALUE; RESONANT MODES ID HIGH-DENSITY FLUIDS; PULSE COMBUSTOR; PISTON ACCELERATION; INERT-GAS; SOLIDS; POINTS AB Acoustic oscillations in practical combustion devices such as pulse combustors and rocket motors, whether desirable or not, are properly interpreted as combustion instabilities. A nonlinear stability analysis of the corresponding fluid motions then shows that the nonsteady behavior is governed by infinitely coupled systems of nonlinear evolution equations for the amplitudes of the classical acoustic modes. However, under certain conditions, it has been conjectured that relatively low-order truncations can give qualitatively correct physical results. In the present work, one particular model of a pulse combustor is considered, and a parameter regime in the neighborhood of a primary acoustic bifurcation where either one or a pair of purely longitudinal acoustic modes achieves a positive linear growth rate is focused upon. In the first case, it is formally shown that a decoupling occurs such that a two-mode approximation consisting of the linearly unstable mode and its first resonant harmonic completely determines the dynamics of the oscillation. In the latter case, it is again demonstrated that a decoupling occurs, and although mode interactions require the retention of additional modes besides the two linearly unstable modes and their first resonant harmonics, a relatively low-order dynamical system still governs the bifurcation behavior. The presence of two linearly unstable modes is then shown to lead to more complicated dynamics, including the stable secondary bifurcation of a multiperiodic acoustic oscillation from one of the single-period primary branches. RP MARGOLIS, SB (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 30 TC 0 Z9 0 U1 0 U2 3 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD DEC PY 1994 VL 54 IS 6 BP 1594 EP 1633 DI 10.1137/S0036139993242558 PG 40 WC Mathematics, Applied SC Mathematics GA PT028 UT WOS:A1994PT02800005 ER PT J AU KREISS, G KREISS, HO PETERSSON, NA AF KREISS, G KREISS, HO PETERSSON, NA TI ON THE CONVERGENCE TO STEADY-STATE OF SOLUTIONS OF NONLINEAR HYPERBOLIC-PARABOLIC SYSTEMS SO SIAM JOURNAL ON NUMERICAL ANALYSIS LA English DT Article DE NONLINEAR STABILITY; TRAVELING WAVES ID STABILITY; WAVES AB The Cauchy problem for time-dependent quasi-linear partial differential equations is considered and the nonlinear stability of steady state solutions is investigated. C1 UNIV CALIF LOS ANGELES,DEPT MATH,LOS ANGELES,CA 90024. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP KREISS, G (reprint author), ROYAL INST TECHNOL,DEPT NUMER ANAL & COMP SCI,S-10044 STOCKHOLM 70,SWEDEN. NR 7 TC 24 Z9 24 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1429 J9 SIAM J NUMER ANAL JI SIAM J. Numer. Anal. PD DEC PY 1994 VL 31 IS 6 BP 1577 EP 1604 DI 10.1137/0731082 PG 28 WC Mathematics, Applied SC Mathematics GA PV369 UT WOS:A1994PV36900005 ER PT J AU GOLDSTEIN, CI AF GOLDSTEIN, CI TI PRECONDITIONING NONCONFORMING FINITE-ELEMENT METHODS SO SIAM JOURNAL ON NUMERICAL ANALYSIS LA English DT Article DE PRECONDITIONING; SINGULAR VALUES; NONCONFORMING FINITE ELEMENT METHODS ID BOUNDARY-CONDITIONS; CONDITION NUMBERS AB This paper is concerned with the H-1-condition number and singular value distribution of preconditioned nonselfadjoint discrete elliptic operators. In particular, a wide class of nonconforming finite element methods are investigated. The main results give a precise interval on which the singular values cluster. Results of this kind have an important bearing on the convergence behavior of the conjugate gradient method applied to the normal equations. RP GOLDSTEIN, CI (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ANALYT SCI,BROOKHAVEN NATL LAB,MATH SCI GRP,UPTON,NY 11973, USA. NR 24 TC 4 Z9 4 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1429 J9 SIAM J NUMER ANAL JI SIAM J. Numer. Anal. PD DEC PY 1994 VL 31 IS 6 BP 1623 EP 1644 DI 10.1137/0731084 PG 22 WC Mathematics, Applied SC Mathematics GA PV369 UT WOS:A1994PV36900007 ER PT J AU BRAMBLE, JH KWAK, DY PASCIAK, JE AF BRAMBLE, JH KWAK, DY PASCIAK, JE TI UNIFORM-CONVERGENCE OF MULTIGRID V-CYCLE ITERATIONS FOR INDEFINITE AND NONSYMMETRIC PROBLEMS SO SIAM JOURNAL ON NUMERICAL ANALYSIS LA English DT Article DE MULTIGRID V-CYCLE; INDEFINITE ID ELLIPTIC PROBLEMS; ALGORITHMS AB In this paper, an analysis of a multigrid method for nonsymmetric and/or indefinite elliptic problems is presented. In this multigrid method various types of smoothers may be used. One type of smoother considered is defined in terms of an associated symmetric problem and includes point and line, Jacobi, and Gauss-Seidel iterations. Smoothers based entirely on the original operator are also considered. One smoother is based on the normal form, that is, the product of the operator and its transpose. Other smoothers studied include point and line, Jacobi, and Gauss-Seidel. It is shown that the uniform estimates of [J.H. Bramble and J. E. Pasciak, Math. Comp., 60 (1993), pp. 447-471] for symmetric positive definite problems carry over to these algorithms. More precisely, the multigrid iteration for the nonsymmetric and/or indefinite problem is shown to converge at a uniform rate provided that the coarsest grid in the multilevel iteration is sufficiently fine (but not dependent on the number of multigrid levels). C1 KOREA ADV INST SCI & TECHNOL,DEPT MATH,TAEJON 305701,SOUTH KOREA. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP BRAMBLE, JH (reprint author), CORNELL UNIV,DEPT MATH,WHITE HALL,ITHACA,NY 14853, USA. RI Kwak, Do young/C-1912-2011 NR 24 TC 47 Z9 48 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 0036-1429 J9 SIAM J NUMER ANAL JI SIAM J. Numer. Anal. PD DEC PY 1994 VL 31 IS 6 BP 1746 EP 1763 DI 10.1137/0731089 PG 18 WC Mathematics, Applied SC Mathematics GA PV369 UT WOS:A1994PV36900012 ER PT J AU TOKUNAGA, T SALVE, R AF TOKUNAGA, T SALVE, R TI GAUGE SENSITIVITY OPTIMIZATION IN AIR POCKET TENSIOMETRY - IMPLICATIONS FOR DEEP VADOSE ZONE MONITORING SO SOIL SCIENCE LA English DT Article ID WATER AB Potential applications of air pocket type tensiometers in measuring hydraulic head profiles in deep vadose zones are discussed. Advantages of this method include (i) the ability to obtain tensiometer measurements far beyond the approximately 9 m-depth often associated with the limit of conventional tensiometry, (ii) ease of regular gauge calibration, and (iii) low cost. Advantages relative to buried, dedicated pressure transducer tensiometers are gained at the expense of substantial losses in gauge sensitivity, S*. In view of this compromise, an analysis was performed to determine the optimal fractional water-filled length, F, for air pocket tensiometers. It is shown that the critical ratio governing the nature of S*-optimization is approximated by (PI* - PI0)z*, where PI* represents the absolute matric head, PI0 is the vapor pressure of water expressed in head units, and z* is the depth of the tensiometer tip. When (PI* - PI0)/z* > 1, S* is optimized when F --> 1. However, when (PI* - PI0)/z* < 1, S* is optimized as F --> 0. The central role of (PI* - PI0)/z* arises from the fact that S* = P(a)/V(g), where P(a) refers to the absolute pressure of all tensiometer headspace gases excluding water vapor, and V(g) refers to the volume of the gas phase within the tensiometer headspace. When (PI* - PI0) is less than z*, S* goes to zero because the absolute pressure in the tensiometer headspace approaches the vapor pressure of the tensiometer water (P(o)) when attempts are made to fill the tensiometer column with liquid water. In the more familiar case of PI* - PI0 being larger than z*, the dominance of P(a) over P(o) assures that S* increases as the instrument is filled. To test the predicted nature of S*, laboratory experiments were performed on 1.11-, 6.36-, and 11.91-m long tensiometers over a range of values of (PI* - PI0) and F sufficient to provide three orders of magnitude variation in S*. Measured S* agreed well with predicted values, and supports the conclusion that response times are minimized with F-->0, in situations where (PI* - PI0)/z* < 1. RP TOKUNAGA, T (reprint author), LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720, USA. RI Tokunaga, Tetsu/H-2790-2014 OI Tokunaga, Tetsu/0000-0003-0861-6128 NR 17 TC 3 Z9 3 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0038-075X J9 SOIL SCI JI Soil Sci. PD DEC PY 1994 VL 158 IS 6 BP 389 EP 397 DI 10.1097/00010694-199415860-00001 PG 9 WC Soil Science SC Agriculture GA PY384 UT WOS:A1994PY38400001 ER PT J AU TOKUNAGA, TK SUTTON, SR BAJT, S AF TOKUNAGA, TK SUTTON, SR BAJT, S TI MAPPING OF SELENIUM CONCENTRATIONS IN SOIL AGGREGATES WITH SYNCHROTRON X-RAY-FLUORESCENCE MICROPROBE SO SOIL SCIENCE LA English DT Article ID EDGE ABSORPTION-SPECTRA; KESTERSON RESERVOIR; GROUNDWATER CONTAMINATION; DENITRIFICATION; CALIFORNIA; RADIATION; EMISSION; MOVEMENT; MINERALS; WATER AB The possible occurrence of reducing microsites in synthetic soil aggregates and their influences on the distribution of selenium species with redox-dependent mobilities was tested using the synchrotron X-ray fluorescence microprobe (SXRFM). Synthetic, effectively two-dimensional soil aggregates of diameters ranging from 10 to 30 mm were constructed, with and without inclusion of sections of Scirpus robustus and S. californicus root sections. Each aggregate was uniformly wetted with a saline solution containing 240 g m-3 Se [98% as Se(VI), and 2% as Se(IV)]. Gas-phase porosities varied between individual aggregates from 0.00 to 0.40 and were maintained relatively constant during the incubation period of up to 17 days. Exchanges of soil gases with atmospheric air occurred only along the periphery of the aggregates. Scanning of the aggregates using SXRFM demonstrated that Se was essentially homogeneously distributed in soils without Scirpus root sections, suggesting that Se remained primarily as the soluble Se(VI) species. The SXRFM results revealed large accumulations of total Se in regions surrounding embedded sections of Scirpus roots. As much as 20-fold local enrichment with respect to total Se was measured in water-saturated soils within 1 to 4 mm of decomposing roots. These observations provide support for a model of localized reducing zones in which Se(VI) is reduced to less mobile Se(IV) and to insoluble Se(0), resulting in local accumulation of total Se. The measured Se accumulation in one microsite compared reasonably well with a simple transient Se(VI) diffusion model. It is postulated that such mechanisms may account for similar heterogeneities observable in some Se-contaminated soils at Kesterson Reservoir. Such heterogeneities in concentrations of Se and other constituents within individual soil aggregates have important implications with respect to reactivity and need to be included in any detailed mechanistic modeling of chemical cycling within soils. This work also provides an example of the substantial capabilities of SXRFM in studies of soils. C1 UNIV CHICAGO,DEPT GEOPHYS SCI,CHICAGO,IL 60637. UNIV CHICAGO,CTR ADV RADIAT SOURCES,CHICAGO,IL 60637. RP TOKUNAGA, TK (reprint author), LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720, USA. RI Bajt, Sasa/G-2228-2010; Tokunaga, Tetsu/H-2790-2014 OI Tokunaga, Tetsu/0000-0003-0861-6128 NR 45 TC 33 Z9 34 U1 0 U2 4 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0038-075X J9 SOIL SCI JI Soil Sci. PD DEC PY 1994 VL 158 IS 6 BP 421 EP 434 DI 10.1097/00010694-199415860-00004 PG 14 WC Soil Science SC Agriculture GA PY384 UT WOS:A1994PY38400004 ER PT J AU MCLAUGHLIN, JW LEWIN, JC REED, DD TRETTIN, CC JURGENSEN, MF GALE, MR AF MCLAUGHLIN, JW LEWIN, JC REED, DD TRETTIN, CC JURGENSEN, MF GALE, MR TI SOIL FACTORS RELATED TO DISSOLVED ORGANIC-CARBON CONCENTRATIONS IN A BLACK SPRUCE SWAMP, MICHIGAN SO SOIL SCIENCE LA English DT Article ID FOREST; SORPTION; SUBSTANCES; WATERSHEDS; CATCHMENT; STREAMS; ACIDITY; EXPORT; MAINE AB Controls on dissolved organic carbon (DOC) concentrations were examined through field and laboratory measurements of a Typic Haplaquod in Michigan. Average DOC concentration in the soil solution at 30-cm depth was 32 mg/L, and groundwater DOC concentration at 2-m depth was 18 mg/L. Oxidation-reduction (redox) potentials measured in the upper 30 cm of soil ranged from -220 mV to +500 mV, indicating the presence of both reduced and oxidized conditions at the site. Mineral soil organic carbon (SOC) ranged from 0.47% in the Bg horizon to 2.70% in the Bhs horizon. Citrate-dithionite extractable iron (Fe(c/d)) ranged from 5.9 mug/g in the E horizon to 85.0 mug/g in the Bhs horizon. Citrate-dithionite extractable aluminum (Al(c/d)) ranged from 2.1 mug/g in the Bg horizon to 15.3 mug/g in the Bhs horizon. Mineral SOC, Fe(c/d), and Al(c/d) concentrations were generally in the low range of those reported for Spodosols in Canada and United States. DOC concentration in both the soil solution and groundwater was strongly negatively related to Al(c/d) and Fe(c/d). Null-point DOC (DOC(np)) concentrations (point at which no net DOC sorption occurs) obtained from sorption studies ranged from greater than 90 mg/L in the E horizon to 18 mg/L in the Bs horizon. This indicated that DOC sorption in the mineral subsoil potentially increased with depth. DOC(np) was also negatively related to Fe(c/d) and Al(c/d). Although DOC concentrations were strongly correlated with Fe and Al in the mineral soil, concentrations of those elements were so low that little DOC was retained in the mineral soil. C1 MICHIGAN TECHNOL UNIV,SCH FORESTRY & WOOD PROD,HOUGHTON,MI 49931. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. MICHIGAN TECHNOL UNIV,DEPT BIOL SCI,HOUGHTON,MI 49931. NR 29 TC 20 Z9 27 U1 0 U2 6 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0038-075X J9 SOIL SCI JI Soil Sci. PD DEC PY 1994 VL 158 IS 6 BP 454 EP 464 DI 10.1097/00010694-199415860-00007 PG 11 WC Soil Science SC Agriculture GA PY384 UT WOS:A1994PY38400007 ER PT J AU CHEN, XM QUINN, JJ AF CHEN, XM QUINN, JJ TI ANGULAR MOMENTA OF COMPOSITE FERMION EXCITATIONS AND THE BAND-STRUCTURE OF FRACTIONAL QUANTUM HALL SYSTEMS SO SOLID STATE COMMUNICATIONS LA English DT Article ID HIERARCHY; FLUID AB The transformation from electrons to composite Fermions turns a fractionally filled electron Landau level into an integrally filled composite Fermion (CF) Landau level. The eigenstates can be described in terms of n(QE) and n(QH), the numbers of quasielectron and quasihole CF excitations. In the absence of interactions between CF excitations, the energy is the sum of the energies of the individual excitations. For the CF filling v* = 1 of a system of N-e electrons, the angular momentum of a quasi electron excitation is given by l(QE) = N-e/2+(n(QH)-n(QE)+1)/2, and l(QH) = l(QE)-1. The allowed values of the total angular momentum L can be obtained by the addition of the angular momenta of the quasielectrons and quasiholes treated as distinguishable sets of Fermions. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP CHEN, XM (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 14 TC 23 Z9 23 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD DEC PY 1994 VL 92 IS 11 BP 865 EP 868 DI 10.1016/0038-1098(94)90917-2 PG 4 WC Physics, Condensed Matter SC Physics GA PU662 UT WOS:A1994PU66200004 ER PT J AU HUNN, JD CHRISTENSEN, CP AF HUNN, JD CHRISTENSEN, CP TI ION-BEAM AND LASER-ASSISTED MICROMACHINING OF SINGLE-CRYSTAL DIAMOND SO SOLID STATE TECHNOLOGY LA English DT Article AB A technique for producing free-standing, single-crystal diamond microstructures from homoepitaxial films has been demonstrated. This simple preparation method for miniature parts makes diamond a reasonable alternative to the more common silicon-based micromechanical devices that have been produced over the past few years. C1 POTOMAC PHOTON,LANHAM,MD. RP HUNN, JD (reprint author), OAK RIDGE NATL LAB,BLDG 5500,MS-6376,OAK RIDGE,TN, USA. NR 6 TC 21 Z9 22 U1 0 U2 2 PU PENNWELL PUBL CO SOLID STATE TECHNOLOGY OFFICE PI NASHUA PA TEN TARA BLVD 5TH FLOOR, NASHUA, NH 03062-2801 SN 0038-111X J9 SOLID STATE TECHNOL JI Solid State Technol. PD DEC PY 1994 VL 37 IS 12 BP 57 EP 60 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA PX329 UT WOS:A1994PX32900014 ER PT J AU VARACALLE, DJ LUNDBERG, LB HERMAN, H BANCKE, G RIGGS, WL AF VARACALLE, DJ LUNDBERG, LB HERMAN, H BANCKE, G RIGGS, WL TI VACUUM PLASMA-SPRAYED ZIRCONIUM CARBIDE COATINGS SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 21st International Conference on Metallurgical Coatings and Thin Films CY APR 25-29, 1994 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met Div, Amer Vacuum Soc, Thin Film Div AB Zirconium carbide coatings were deposited on graphite substrates using the vacuum plasma spray process. Controlled vacuum spraying of pure compound powder was used to maintain the coating purity and to minimize the porosity of the sprayed carbide. Coating optimization studies were conducted using a Taguchi statistical fractional-factorial design of experiments. The effects of three plasma processing variables (i.e. gun current, argon primary gas Bow, hydrogen secondary gas flow) were evaluated relative to the coating attributes of thickness, porosity, superficial hardness, and microhardness. As-sprayed coating qualities are discussed with respect to the influence of the processing parameters. In addition, the effect of annealing the carbide samples in an argon atmosphere at 1998 K, 2373 K, and 2673 K for 1 h was studied. C1 SUNY STONY BROOK,DEPT MAT SCI,STONY BROOK,NY 11794. TUBALCAIN CO,LOVELAND,OH 45140. RP VARACALLE, DJ (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 9 TC 7 Z9 7 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD DEC PY 1994 VL 68 BP 86 EP 91 DI 10.1016/0257-8972(94)90143-0 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA PW039 UT WOS:A1994PW03900016 ER PT J AU COURTRIGHT, EL AF COURTRIGHT, EL TI A REVIEW OF FUNDAMENTAL COATING ISSUES FOR HIGH-TEMPERATURE COMPOSITES SO SURFACE & COATINGS TECHNOLOGY LA English DT Article ID THERMAL RESIDUAL-STRESSES; CERAMIC-METAL INTERFACES; FINITE-ELEMENT ANALYSIS; MECHANICAL-PROPERTIES; OXIDATION AB This review addresses many of the fundamental issues associated with the use of coatings in high temperature aggressive environments with specific emphasis on multi-component composites. A major concern is damage caused by the permeation of oxygen into matrix cracks causing internal oxidation and attack along fiber/matrix interfaces. In addition, many prospective coatings that might be used to protect composites are susceptible to hot corrosion, particularly by small vanadate concentrations that could degrade the coating and, thereby, enhance the permeation of other aggressive species. The mechanical stability of coating systems is also a major consideration in determining performance. Large differences in thermal expansion coefficients between the coating and the composite substrate are not necessarily ameliorated by the practice of grading interfaces. However, the use of functionally graded coatings can be beneficial in reducing interlaminar shear and across-ply strains. Crack management, including the use of sealants, can be an essential part of a functional design, but the thermochemical stability of the glass sealant must be considered at elevated temperatures. RP COURTRIGHT, EL (reprint author), PACIFIC NW LAB, RICHLAND, WA USA. NR 37 TC 21 Z9 21 U1 1 U2 7 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD DEC PY 1994 VL 68 BP 116 EP 125 DI 10.1016/0257-8972(94)90148-1 PG 10 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA PW039 UT WOS:A1994PW03900021 ER PT J AU ANDERS, S ANDERS, A BROWN, IG WEI, B KOMVOPOULOS, K AGER, JW YU, KM AF ANDERS, S ANDERS, A BROWN, IG WEI, B KOMVOPOULOS, K AGER, JW YU, KM TI EFFECT OF VACUUM ARE DEPOSITION PARAMETERS ON THE PROPERTIES OF AMORPHOUS-CARBON THIN-FILMS SO SURFACE & COATINGS TECHNOLOGY LA English DT Article ID DIAMOND-LIKE CARBON; ARC DEPOSITION; LASER EVAPORATION; ION-BEAM; COATINGS; RAMAN; SPECTROSCOPY AB Hard and smooth films of amorphous carbon with thicknesses in the nanometer to micrometer range were formed on silicon substrates using a vacuum are deposition technique. In this technique, a carbon plasma is generated by a vacuum are plasma source coupled with a magnetic filter for obtaining macroparticle-free amorphous carbon films. The influence of the substrate bias voltage and pulsed bias duty cycle on the film properties was investigated. A significant enhancement of the film quality and adhesion was achieved by applying a negative pulsed bias voltage to the substrate. Nanoindentation, pin-on-disk tribotesting, surface profilometry, Rutherford backscattering spectroscopy, elastic recoil spectroscopy, and Raman spectroscopy were used to characterize the properties and structure of the amorphous carbon films. It was found that the hardest films with the highest density and lowest friction coefficient were obtained at -100 V pulsed bias voltage, whereas higher pulsed bias voltages improved the film adhesion and reduced the internal stress. For -100 V pulsed bias voltage, the maximum film hardness was achieved with a 50% duty cycle, and was significantly higher than that produced with a d.c. bias. C1 UNIV CALIF BERKELEY, DEPT MECH ENGN, BERKELEY, CA 94720 USA. RP ANDERS, S (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RI Yu, Kin Man/J-1399-2012; Anders, Andre/B-8580-2009; Raoux, Simone/G-3920-2016 OI Yu, Kin Man/0000-0003-1350-9642; Anders, Andre/0000-0002-5313-6505; NR 36 TC 108 Z9 112 U1 2 U2 14 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD DEC PY 1994 VL 68 BP 388 EP 393 DI 10.1016/0257-8972(94)90191-0 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA PW039 UT WOS:A1994PW03900064 ER PT J AU JANKOWSKI, AF HAYES, JP KANNA, RL AF JANKOWSKI, AF HAYES, JP KANNA, RL TI EUTECTIC BONDING OF A TI SPUTTER COATED CARBON AEROGEL WAFER TO AN NI FOIL SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 21st International Conference on Metallurgical Coatings and Thin Films CY APR 25-29, 1994 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met Div, Amer Vacuum Soc, Thin Film Div AB The formation of high density, energy storage devices is achievable using composite material systems. Alternate layering of carbon aerogel wafers and Ni foils with microporous separators is a prospective composite for capacitor applications. An inherent problem exists concerning the formation of a physical bond between the Ni foil and the porous carbon wafer. The bond process temperature must be less than 1050 degrees C, at which point the aerogel begins to degrade. The advantage of a low temperature eutectic in the Ni-Ti alloy system solves this problem. Ti, a carbide former, is readily adherent as a sputter deposited thin film on the carbon wafer. A vacuum bonding process is then used to join the Ni foil and Ti coating through eutectic phase formation. The parameters for successful bonding are examined along with structural characterization of the Ni foil-carbon aerogel wafer interface. A 950 degrees C 30 min heat treatment under high vacuum is found to yield bond failure in the aerogel wafer covering one-third the surface area. RP JANKOWSKI, AF (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD DEC PY 1994 VL 68 BP 675 EP 678 DI 10.1016/0257-8972(94)90236-4 PG 4 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA PW039 UT WOS:A1994PW03900109 ER PT J AU BEDROSSIAN, PJ AF BEDROSSIAN, PJ TI ONE-DIMENSIONAL ORDERING ON THE MO/SI(100) INTERFACE SO SURFACE SCIENCE LA English DT Article ID MOLYBDENUM; SILICON; GROWTH; CRSI2; MOSI2; AUGER; SI AB Submonolayer deposition of Mo on Si(100) below 650 degrees C leads to two surface phases which exhibit short range ( similar to 25 Angstrom) order in one dimension only. The resulting surface was previously thought to be amorphous, but tunneling microscopy reveals the locally ordered character of the system. RP BEDROSSIAN, PJ (reprint author), LAWRENCE LIVERMORE NATL LAB,L-350,LIVERMORE,CA 94551, USA. NR 20 TC 9 Z9 9 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD DEC 1 PY 1994 VL 320 IS 3 BP 247 EP 251 DI 10.1016/0039-6028(94)90312-3 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PV671 UT WOS:A1994PV67100013 ER PT J AU WANG, LQ BAER, DR ENGELHARD, MH AF WANG, LQ BAER, DR ENGELHARD, MH TI CREATION OF VARIABLE CONCENTRATIONS OF DEFECTS ON TIO2,(110) USING LOW-DENSITY ELECTRON-BEAMS SO SURFACE SCIENCE LA English DT Article ID TIO2(110) SURFACES; STIMULATED DESORPTION; CHEMISORBED PHASES; SPECTROSCOPY; OXYGEN; TIO2; WATER; H2O; DIFFRACTION; ADSORPTION AB Low density (similar to mu A/cm(2)) 0.48 and 1.0 keV electron beams have been used to create surface defects on a TiO2(110) surface. These electron-beam induced defects were examined primarily by X-ray photoelectron spectroscopy (XPS) with supporting ultraviolet photoemission spectroscopy (WS). Glancing and normal emission XPS spectra of nearly defect-free surfaces revealed that Ti atoms on the surface were similar to the bulk Ti, while some surface oxygen atoms were different from the bulk oxygen. XPS of Ti 2p(3/2) was used to quantify the defect concentration and to examine the defect electronic structure. Based on our calculation of defect concentrations and the comparison of our results with results and models from the literature, we conclude that oxygen vacancies induced by election beams in the current study are mostly from the bridging oxygen sites, in agreement with the previous work. A range of defect concentrations with similar electronic structure, mainly composed of Ti3+, have been induced by low-density electron beams. Beam energy and exposure were the experimental variables. The rates of defect formation at low beam exposure were beam-energy dependent, with a faster growth rate at 0.48 keV than at 1.0 keV. These defects were similar to those by thermal annealing in vacuum, but a higher concentration of defects could be obtained with longer beam exposure. However, the e-beam induced defects were different from those produced by Ar+ ion bombardment since both this and previous studies have found defects produced by Ar+ ion bombardment to be complex, with a variety of different local environments where oxygen and titanium surface atoms coexist. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. RP WANG, LQ (reprint author), PACIFIC NW LAB, CTR MAT & CHEM SCI, POB 999, RICHLAND, WA 99352 USA. RI Engelhard, Mark/F-1317-2010; Baer, Donald/J-6191-2013; OI Baer, Donald/0000-0003-0875-5961; Engelhard, Mark/0000-0002-5543-0812 NR 28 TC 119 Z9 119 U1 4 U2 24 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD DEC 1 PY 1994 VL 320 IS 3 BP 295 EP 306 DI 10.1016/0039-6028(94)90317-4 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PV671 UT WOS:A1994PV67100018 ER PT J AU PEDEN, CHF ROGERS, JW SHINN, ND AF PEDEN, CHF ROGERS, JW SHINN, ND TI CONTRASTED BEHAVIOR OF SI(001) AND SI(111) SURFACES WITH RESPECT TO NH3 ADSORPTION AND THERMAL NITRIDATION - A N 1S AND SI 2P CORE-LEVEL STUDY WITH SYNCHROTRON-RADIATION - COMMENT SO SURFACE SCIENCE LA English DT Note ID SI3N4 THIN-FILMS; AMMONIA C1 UNIV WASHINGTON, DEPT CHEM ENGN, SEATTLE, WA 98195 USA. SANDIA NATL LABS, DEPT SURFACE & INTERFACE SCI, ALBUQUERQUE, NM 87185 USA. RP PEDEN, CHF (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, MS K2-12, RICHLAND, WA 99352 USA. RI Sirotti, Fausto/F-3052-2017; OI Sirotti, Fausto/0000-0001-8753-8425; Peden, Charles/0000-0001-6754-9928 NR 9 TC 3 Z9 3 U1 0 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 DEC 1 PY 1994 VL 320 IS 3 BP 369 EP 370 DI 10.1016/0039-6028(94)90325-5 PG 2 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PV671 UT WOS:A1994PV67100026 ER PT J AU CHAMBERS, SA TRAN, TT HILEMAN, TA JURGENS, TA AF CHAMBERS, SA TRAN, TT HILEMAN, TA JURGENS, TA TI EPITAXIAL-GROWTH OF MGO ON LATTICE-MATCHED CRXMO1-X(001) SO SURFACE SCIENCE LA English DT Letter ID X-RAY PHOTOELECTRON; ENERGY-ELECTRON-DIFFRACTION; OXIDE SURFACES; OXIDATION; FILMS; AUGER; CRYSTALLOGRAPHY; MICROSCOPY; MO(100); PT(111) AB We describe the MBE growth and structural characterization of ultrathin layers of epitaxial MgO on CrxMo1-x (x approximate to 0.65). The metal alloy was grown as an epitaxial film on high-quality MgO(001) substrates. This kind of epitaxy produces unstrained MgO surfaces of very high structural quality on a conducting substrate. Such materials will enable definitive investigations of surface structure and reactivity using charged-particle spectroscopy, diffraction, and imaging. The role of lattice matching is discussed and shown to be very important. C1 UNIV WASHINGTON, DEPT CHEM ENGN, SEATTLE, WA 98195 USA. RP CHAMBERS, SA (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, POB 999,MS K2-12, RICHLAND, WA 99352 USA. NR 27 TC 15 Z9 15 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD DEC 1 PY 1994 VL 320 IS 3 BP L81 EP L88 DI 10.1016/0039-6028(94)90302-6 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PV671 UT WOS:A1994PV67100003 ER PT J AU LAMB, T LYDEARD, C WALKER, RB GIBBONS, JW AF LAMB, T LYDEARD, C WALKER, RB GIBBONS, JW TI MOLECULAR SYSTEMATICS OF MAP TURTLES (GRAPTEMYS) - A COMPARISON OF MITOCHONDRIAL RESTRICTION SITE VERSUS SEQUENCE DATA SO SYSTEMATIC BIOLOGY LA English DT Article ID FRESH-WATER FISHES; DNA EVOLUTION; UNITED-STATES; PHYLOGENETIC-RELATIONSHIPS; NATURAL-POPULATIONS; CICHLID FISHES; SPECIATION; DIFFERENTIATION; ENDONUCLEASES; BIOGEOGRAPHY AB Analyses of mitochondrial DNA (mtDNA) restriction sites and sequences were used to estimate phylogenetic relationships in the emydid turtle genus Graptemys. We compared resolution and concordance among four mtDNA data sets: (1) restriction sites, (2) cytochrome b sequences (380 base positions [bp]), (3) control region sequences (344 bp), and (4) combined (cytochrome b and control region) sequences. Five of the 12 currently recognized species could not be distinguished on the basis of restriction sites. Cytochrome b sequences provided even less phylogenetic information, whereas control region sequences identified all taxa. Bootstrap consensus trees for the restriction site and control region sequence data resolved three monophyletic clades: a pulchra group, a pseudogeographica group, and the basal G. geographica. Of the four data sets, the control region offered the greatest resolution with respect to species identification and phylogenetic information. However, a character congruence approach, combining both sequence and restriction site characters, significantly bolstered bootstrap support for the major clades and enhanced phylogenetic resolution within them. Sequence divergence estimates (restriction sites: 0.0-3.2%; cytochrome b: 0.0-1.5%) for Graptemys are among the lowest values reported for a generic-level comparison involving vertebrates. These Endings are discussed in light of recent drainage isolation events along the Gulf of Mexico and a proposed slow rate of mtDNA evolution in turtles. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. RP LAMB, T (reprint author), E CAROLINA UNIV,DEPT BIOL,GREENVILLE,NC 27858, USA. NR 62 TC 75 Z9 79 U1 1 U2 9 PU SOC SYSTEMATIC BIOLOGISTS PI WASHINGTON PA NATL MUSEUM NATURAL HISTORY NHB 163, WASHINGTON, DC 20560 SN 1063-5157 J9 SYST BIOL JI Syst. Biol. PD DEC PY 1994 VL 43 IS 4 BP 543 EP 559 DI 10.2307/2413551 PG 17 WC Evolutionary Biology SC Evolutionary Biology GA QE100 UT WOS:A1994QE10000006 ER PT J AU MILANOVICH, FP BROWN, SB COLSTON, BW DALEY, PF LANGRY, KC AF MILANOVICH, FP BROWN, SB COLSTON, BW DALEY, PF LANGRY, KC TI A FIBEROPTIC SENSOR SYSTEM FOR MONITORING CHLORINATED-HYDROCARBON POLLUTANTS SO TALANTA LA English DT Note AB We have developed and field-tested a fiber-optic chemical sensor system for use in environmental monitoring and remediation. The system detects chlorinated hydrocarbon pollutants with colorimetry, and is based on an irreversible chemical reaction between the target compound and a specific reagent. The reaction products are detected by their absorption at 560 nm and can be monitored remotely with optical fibers. Continuous measurements are made possible by renewing the reagent from a reservoir with a miniature pumping system. The sensor has been evaluated against gas chromatography standards and has demonstrated accuracy and sensitivity (5 ppbw) sufficient for the environmental monitoring of trichloroethylene and chloroform. Successful preliminary field tests have been conducted in a variety of contamination monitoring scenarios. C1 LAWRENCE LIVERMORE NATL LAB, DIV ENVIRONM RESTORAT, LIVERMORE, CA 94550 USA. RP MILANOVICH, FP (reprint author), LAWRENCE LIVERMORE NATL LAB, DIV HLTH & ECOL ASSESSMENT, LIVERMORE, CA 94550 USA. NR 8 TC 15 Z9 15 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0039-9140 J9 TALANTA JI Talanta PD DEC PY 1994 VL 41 IS 12 BP 2189 EP 2194 DI 10.1016/0039-9140(94)00159-6 PG 6 WC Chemistry, Analytical SC Chemistry GA QE533 UT WOS:A1994QE53300027 PM 18966191 ER PT J AU CHINN, D JANATA, J AF CHINN, D JANATA, J TI SPIN-CAST THIN-FILMS OF POLYANILINE SO THIN SOLID FILMS LA English DT Article DE INSULATORS; INTERFACES; POLYMERS; SENSORS ID ELECTROACTIVE POLYANILINE; NONAQUEOUS SOLUTION; OXIDATION; ACID; PROCESSABILITY; CONDUCTIVITY AB Thin films of polyaniline have been spin cast from solutions of formic acid in concentrations of up to 3 wt.% which give thicknesses between 80 and 250 nm. These films have been patterned using positive photoresist and etched in an oxygen plasma. Silicon wafers with 200 nm of dry thermal oxide and 100 nm of sputtered silicon nitride were used as substrates. Platinum leads in a four-probe configuration were built on top of the insulators and the polyaniline was spun on top of these. Different adhesion promoters were examined for electrical interference. The spin-cast films are sufficiently electroactive to allow for the growth of polyaniline on top of them by electrochemical means. C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. UNIV UTAH, DEPT MAT SCI & ENGN, SALT LAKE CITY, UT 84112 USA. NR 25 TC 22 Z9 22 U1 0 U2 6 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0040-6090 J9 THIN SOLID FILMS JI Thin Solid Films PD DEC 1 PY 1994 VL 252 IS 2 BP 145 EP 151 DI 10.1016/0040-6090(94)90787-0 PG 7 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA PT310 UT WOS:A1994PT31000012 ER PT J AU GREENE, DL AF GREENE, DL TI TRANSPORTATION AND ENERGY SO TRANSPORTATION QUARTERLY LA English DT Article RP GREENE, DL (reprint author), OAK RIDGE NATL LAB,CTR TRANSPORTAT ANAL,OAK RIDGE,TN 37831, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ENO FOUNDATION TRANSPORT INC PI LANSDOWNE PA 44211 SLATE STONE CT, LANSDOWNE, VA 22075 SN 0278-9434 J9 TRANSPORT Q JI Transp. Q. PD WIN PY 1994 VL 48 IS 1 BP 91 EP 101 PG 11 WC Transportation SC Transportation GA PC399 UT WOS:A1994PC39900010 ER PT J AU HANSON, PJ SAMUELSON, LJ WULLSCHLEGER, SD TABBERER, TA EDWARDS, GS AF HANSON, PJ SAMUELSON, LJ WULLSCHLEGER, SD TABBERER, TA EDWARDS, GS TI SEASONAL PATTERNS OF LIGHT-SATURATED PHOTOSYNTHESIS AND LEAF CONDUCTANCE FOR MATURE AND SEEDLING QUERCUS-RUBRA L FOLIAGE - DIFFERENTIAL SENSITIVITY TO OZONE EXPOSURE SO TREE PHYSIOLOGY LA English DT Article DE AIR POLLUTANT; FOLIAR ANATOMY; OZONE DOSE; OZONE UPTAKE; STOMATAL RESPONSE AB Extrapolation of the effects of ozone on seedlings to large trees and forest stands is a common objective of current assessment activities, but few studies have examined whether seedlings are useful surrogates for understanding how mature trees respond to ozone. This two-year study utilized a replicated open-top chamber facility to test the effects of subambient, ambient and twice ambient ozone concentrations on light-saturated net photosynthesis (P(max)) and leaf conductance (g1) of leaves from mature trees and genetically related seedlings of northern red oak (Quercus rubra L.). Gas exchange measurements were collected four times during the 1992 and 1993 growing seasons. Both P(max) and g1 of all foliage followed normal seasonal patterns of ontogeny, but mature tree foliage had greater P(max) and g1 than seedling foliage at physiological maturity. At the end of the growing season, P(max) and g1 of the mature tree foliage exposed to ambient (almost-equal-to 80-100 ppm-h) and twice ambient (almost-equal-to 150-190 ppm-h) exposures of ozone were reduced 25 and 50%, respectively, compared with the values for foliage in the subambient ozone treatment (almost-equal-to 35 ppm-h). In seedling leaves, P(max) and g1 were less affected by ozone exposure than in mature leaves. Extrapolations of the results of seedling exposure studies to foliar responses of mature forests without considering differences in foliar anatomy and stomatal response between juvenile and mature foliage may introduce large errors into projections of the response of mature trees to ozone. RP HANSON, PJ (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Hanson, Paul J./D-8069-2011; Wullschleger, Stan/B-8297-2012 OI Hanson, Paul J./0000-0001-7293-3561; Wullschleger, Stan/0000-0002-9869-0446 NR 0 TC 77 Z9 77 U1 1 U2 10 PU HERON PUBLISHING PI VICTORIA PA BOX 5579 STATION B, VICTORIA BC V8R 6S4, CANADA SN 0829-318X J9 TREE PHYSIOL JI Tree Physiol. PD DEC PY 1994 VL 14 IS 12 BP 1351 EP 1366 PG 16 WC Forestry SC Forestry GA PV834 UT WOS:A1994PV83400004 ER PT J AU BLAU, PJ MARTIN, RL AF BLAU, PJ MARTIN, RL TI FRICTION AND WEAR OF CARBON GRAPHITE MATERIALS AGAINST METAL AND CERAMIC COUNTERFACES SO TRIBOLOGY INTERNATIONAL LA English DT Article DE GRAPHITE; CARBON GRAPHITE; PISTON; WEAR TRANSITIONS; ABRASIVE CONTAMINANTS; LUBRICATED WEAR; UNLUBRICATED WEAR AB The unlubricated and lubricated sliding friction and wear behaviour of eleven commercially produced carbon-graphite (CG) materials, were evaluated as part of an effort to identify promising tribomaterials for use as piston-wrist couples in energy-efficient, low-emission automotive and truck engines. Graphite has a low density and thus the potential to reduce engine weight and enhance efficiency. The CG materials varied in composition, density and mechanical properties. All eleven grades of CG materials were tested in ball-on-flat reciprocating sliding against M-50 tool steel and NBD 100 silicon nitride spheres under unlubricated conditions. In addition, six of the grades were tested under both hot oil-lubricated conditions and abrasive dust-contaminated hot oil. The friction of all compositions was greatly reduced by lubrication, but wear was significantly increased in almost all cases. Interestingly, the introduction of abrasive mineral dust into the lubricant slightly reduced the friction coefficients and the wear rates of the materials tested. Wear of the counterface materials was generally too small to measure or was obscured by adherent transfer. Two CG compositions experienced mild-to-severe wear transitions in the unlubricated tests, but lubrication with hot oil tended to suppress those transitions. RP BLAU, PJ (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 11 TC 20 Z9 20 U1 0 U2 5 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0301-679X J9 TRIBOL INT JI Tribol. Int. PD DEC PY 1994 VL 27 IS 6 BP 413 EP 422 DI 10.1016/0301-679X(94)90018-3 PG 10 WC Engineering, Mechanical SC Engineering GA QE184 UT WOS:A1994QE18400005 ER PT J AU SKEEN, RS AMOS, KM PETERSEN, JN AF SKEEN, RS AMOS, KM PETERSEN, JN TI INFLUENCE OF NITRATE CONCENTRATION ON CARBON-TETRACHLORIDE TRANSFORMATION BY A DENITRIFYING MICROBIAL CONSORTIUM SO WATER RESEARCH LA English DT Article DE CCL4 BIODEGRADATION; IN SITU BIOREMEDIATION; DENITRIFICATION; ELECTRON DONOR; ELECTRON ACCEPTOR ID SP STRAIN KC; DENITRIFICATION CONDITIONS; ORGANIC-COMPOUNDS AB A denitrifying consortium capable of transforming carbon tetrachloride (CCl4) was cultured from an aquifer soil isolated sample from the DOE Hanford Site in southeastern Washington State. Experiments were performed to determine the effects of nitrate concentration on CCl4 transformation by these microbes. The microorganisms were cultured under two different experimental conditions, both of which gave similar cell growth. Under conditions where both the electron donor (acetate) and electron acceptor (nitrate) were present at all times, little CCl4 transformation was observed. However, transformation was observed if the nitrate concentration was reduced to a level where it was periodically depleted. These results are discussed in relation to the design of an in situ bioremediation system. C1 WASHINGTON STATE UNIV, DEPT CHEM ENGN, PULLMAN, WA 99164 USA. RP SKEEN, RS (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. RI Petersen, James/B-8924-2008 NR 18 TC 12 Z9 12 U1 0 U2 3 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 DEC PY 1994 VL 28 IS 12 BP 2433 EP 2438 DI 10.1016/0043-1354(94)90061-2 PG 6 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA PP845 UT WOS:A1994PP84500002 ER PT J AU ELMER, JW NEWTON, MA SMITH, AC AF ELMER, JW NEWTON, MA SMITH, AC TI TRANSFORMATION HARDENING OF STEEL USING HIGH-ENERGY ELECTRON-BEAMS SO WELDING JOURNAL LA English DT Article DE HIGH-ENERGY EB; ELECTRON BEAM; TRANSFORM; HARDENING; VAPORIZE; THRESHOLD; LOCALIZED HEATING; INCIDENCE ANGLES; COVERAGE RATES; RAPID THERMAL PROC; VOLUMETRIC HEATING AB Megavolt/megawatt high-energy electron beams (HEEBs) represent a new generation of charged particle beams that have unique capabilities for advanced processing of materials. These beams have energies in the 1 to 10 MeV range, which enables them to deposit energy volumetrically within the material being processed, under rapid and controlled conditions. One material processing application for HEEBs is the localized transformation hardening of steel. The high accelerating voltage of the electron beam allows its energy to be deposited subsurface, so that the steel can be heat treated at depth without melting, while the beam's high average power allows transformation hardening to be performed at rapid surface coverage rates. In this investigation, a 6 MeV electron beam was used to process plain carbon steel and O-1 tool steel using stationary and traveling beams, at normal and glancing angles of incidence. These experiments investigated the beam fluence thresholds for transformation hardening, melting, and vaporization of steel. Localized transformation hardening of steel was performed at a surface fluence of approximately 20 J/mm2, which hardened the steel to a depth of nearly 2 mm without melting, thus producing a microstructure that was free of solidification-related defects such as cracking and porosity. Achieving deep localized heat treating of steel to its peak hardness without surface melting and at high surface coverage rates is not possible by conventional directed energy beam processing techniques. RP ELMER, JW (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 11 TC 2 Z9 2 U1 1 U2 1 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD DEC PY 1994 VL 73 IS 12 BP S291 EP S299 PG 9 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA PV443 UT WOS:A1994PV44300016 ER PT J AU TRIBBLE, DL FRANK, E AF TRIBBLE, DL FRANK, E TI DIETARY ANTIOXIDANTS, CANCER, AND ATHEROSCLEROTIC HEART-DISEASE SO WESTERN JOURNAL OF MEDICINE LA English DT Article ID LOW-DENSITY-LIPOPROTEIN; CORONARY-ARTERY DISEASE; TUMOR SUPPRESSOR GENES; VITAMIN-E CONSUMPTION; OXIDATIVE MODIFICATION; CELL-PROLIFERATION; ASCORBIC-ACID; ENDOTHELIAL-CELLS; BETA-CAROTENE; UNITED-STATES C1 EMORY UNIV,SCH MED,DEPT FAMILY & PREVENT MED,ATLANTA,GA 30322. EMORY UNIV,SCH MED,DEPT MED,ATLANTA,GA 30322. RP TRIBBLE, DL (reprint author), LAWRENCE BERKELEY LAB,DEPT MOLEC & NUCL MED,DIV LIFE SCI,DONNER RM 465,BERKELEY,CA 94720, USA. NR 114 TC 15 Z9 16 U1 0 U2 3 PU CALIF MEDICAL ASSN PI SAN FRANCISCO PA 221 MAIN STREET, SAN FRANCISCO, CA 94105 SN 0093-0415 J9 WESTERN J MED JI West. J. Med. PD DEC PY 1994 VL 161 IS 6 BP 605 EP 612 PG 8 WC Medicine, General & Internal SC General & Internal Medicine GA PX758 UT WOS:A1994PX75800013 PM 7856167 ER PT J AU MCALPINE, S RHODES, OE MCCREEDY, CD BRISBIN, IL AF MCALPINE, S RHODES, OE MCCREEDY, CD BRISBIN, IL TI GENETIC-STRUCTURE IN A WINTERING POPULATION OF AMERICAN COOTS SO WILSON BULLETIN LA English DT Note C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. PURDUE UNIV,DEPT VET PATHOL,W LAFAYETTE,IN 47907. RP MCALPINE, S (reprint author), NATURE CONSERVANCY,315 ALEXANDER ST,ROCHESTER,NY 14604, USA. NR 17 TC 2 Z9 2 U1 1 U2 2 PU WILSON ORNITHOLOGICAL SOC PI ANN ARBOR PA MUSEUM OF ZOOLOGY UNIV MICHIGAN, ANN ARBOR, MI 48109 SN 0043-5643 J9 WILSON BULL JI Wilson Bull. PD DEC PY 1994 VL 106 IS 4 BP 738 EP 743 PG 6 WC Ornithology SC Zoology GA PZ524 UT WOS:A1994PZ52400013 ER PT J AU WERNERZWANZIGER, U ZIEGEWEID, M BLACK, B PINES, A AF WERNERZWANZIGER, U ZIEGEWEID, M BLACK, B PINES, A TI N-14 SQUID NQR OF L-ALA-L-HIS AND OF SERINE SO ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES LA English DT Article DE SQUID; NQR; AMINO ACIDS; N-14 ID AMINO-ACIDS; RESONANCE; N-14 AB N-14 nuclear quadrupole resonance spectroscopy, detected with a Superconducting Quantum Interference Device, makes possible the study of nitrogen environments in amino acids and small peptides. The present experiments characterize: 1) the effects of intermolecular interactions upon the amino nitrogen of serine upon cocrystallization of the stereoisomers in a range of concentrations; 2) the changes of the amino and imidazole nitrogen environments brought about by combining L-Alanine and L-Histidine into the dipeptide L-Ala-L-His. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 15 TC 5 Z9 5 U1 0 U2 2 PU VERLAG Z NATURFORSCH PI TUBINGEN PA POSTFACH 2645, W-7400 TUBINGEN, GERMANY SN 0932-0784 J9 Z NATURFORSCH A JI Z. Naturfors. Sect. A-J. Phys. Sci. PD DEC PY 1994 VL 49 IS 12 BP 1188 EP 1192 PG 5 WC Chemistry, Physical; Physics, Multidisciplinary SC Chemistry; Physics GA QH740 UT WOS:A1994QH74000013 ER PT J AU KAYSER, AT WILCKE, W KAUPENJOHANN, M JOSLIN, JD AF KAYSER, AT WILCKE, W KAUPENJOHANN, M JOSLIN, JD TI SMALL-SCALE HETEROGENEITY OF SOIL CHEMICAL-PROPERTIES .1. A TECHNIQUE FOR RAPID AGGREGATE FRACTIONATION SO ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE LA English DT Article ID TRANSPORT; WATER AB Several recent studies have observed physical, chemical and microbiological heterogeneities on the scale of soil aggregates. The publications emphasize the ecological importance of these small scale gradients. This paper introduces a method for the rapid fractionation of soil structure units into a surface fraction and a core fraction. The technique combines a rapid freezing in liquid N-2 and standardized wet sieving of the structure units. During the sieving process the aggregate surfaces begin to thaw and are consequently washed through the sieve. The soil passing the sieve during a specified time is termed aggregate surface fractions, the remainder is the aggregate core fraction. Samples from 18 forest soil profile were taken to study the precision and accuracy of the method, as well as factors determining the efficiency of fractionation. The precision of aggregate fractionation as determined by parallel fractionations yielded coefficients of variability of 5.3 to 7.5 % and 6.5 to 11.4 % for the amount of core and surface fraction, respectively. Furthermore, the proposed technique yielded results comparable to those obtained by manual razor-peeling of the aggregate surfaces. The variation of concentrations of chemical parameters in water extracts of both aggregate fractions was up to six times greater than in soil solutions obtained from mixed samples. Increasing soil organic C resulted in a decrease in the proportion of the aggregate surface soil collected under fixed sieving conditions, while clay content correlated positively with the amount of the aggregate surface fraction collected. C1 OAK RIDGE NATL LAB,TENNESSEE VALLEY AUTHOR,OAK RIDGE,TN 37831. RP KAYSER, AT (reprint author), UNIV BAYREUTH,CHAIR SOIL SCI & SOIL GEOG,D-95440 BAYREUTH,GERMANY. NR 20 TC 28 Z9 30 U1 2 U2 5 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0044-3263 J9 Z PFLANZ BODENKUNDE JI Z. Pflanzen. Bodenk. PD DEC PY 1994 VL 157 IS 6 BP 453 EP 458 DI 10.1002/jpln.19941570610 PG 6 WC Agronomy; Plant Sciences; Soil Science SC Agriculture; Plant Sciences GA QB643 UT WOS:A1994QB64300009 ER PT J AU HELGESSON, J ARVE, P AF HELGESSON, J ARVE, P TI THE DECAY OF SPIN-ISOSPIN MODES IN A SEMIINFINITE SLAB SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID CHARGE-EXCHANGE REACTIONS; DELTA-EXCITATION; NUCLEI; SCATTERING; REGION AB The surface response for charge exchange (p, n) and (He-3, T) reactions is studied in the Delta-region using the semi-infinite slab model. The contribution to the total response from different decay channels, (NN, N pi, pi), is calculated. These decay channels corresponds to the exclusive channels, (pp, p pi(+), pi(+)), measured in recent (p, n) and (He-3, T) experiments. The in-medium properties of the Delta-resonance is taken into account by using microscopic calculations of the Delta-width in nuclear matter. From the Delta-width in nuclear matter a non-local imaginary Delta-potential, as well as a local potential, is constructed for the semi-infinite slab model. The results in the semi-infinite slab model gives a qualitative understanding of the exclusive experiments. The exclusive (NN, N pi, pi) channels are more sensitive, than the total response, to g'-correlation parameters, Delta-width and the absorption function used at the external vertex. Our calculations suggest low values of the g'-correlation parameters g(N Delta)' and g(Delta Delta)' (similar to 0.3). The results with the Delta-width represented as a non-local or a local Delta-potential are very similar, with only minor differences in the exclusive channels. C1 LUND INST TECHNOL,DEPT MATH PHYS,S-22100 LUND,SWEDEN. LULEA UNIV TECHNOL,DEPT PHYS,S-97187 LULEA,SWEDEN. RP HELGESSON, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 18 TC 0 Z9 0 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 DEC PY 1994 VL 350 IS 3 BP 237 EP 247 DI 10.1007/BF01289588 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA PU769 UT WOS:A1994PU76900013 ER PT J AU AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BEYER, R BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M ERDMANN, W EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FEIST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNER, D GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWIRT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WAGENER, M WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZARBOCK, D ZHANG, Z ZIMMER, M ZIMMERMAN, W ZOMER, F ZUBER, K AF AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BEYER, R BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M ERDMANN, W EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FEIST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNER, D GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWIRT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WAGENER, M WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZARBOCK, D ZHANG, Z ZIMMER, M ZIMMERMAN, W ZOMER, F ZUBER, K TI A SEARCH FOR LEPTOQUARKS AND SQUARKS AT HERA SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LIQUID ARGON CALORIMETER; LUND MONTE-CARLO; PARTON DISTRIBUTIONS; JET FRAGMENTATION; STANDARD MODEL; E+E-PHYSICS; LEPTON; SUPERSYMMETRY; SUBSTRUCTURE; SCATTERING AB A search in the H1 experiment at HERA for scalar and vector leptoquarks, leptogluons and squarks coupling to first generation fermions is presented in a data sample corresponding to an integrated luminosity of 425 nb(-1). For masses ranging up to similar to 275 GeV, no significant evidence for the direct production of such particles is found in various possible decay channels. At high masses and beyond the centre of mass energy of 296 GeV a contact interaction analysis is used to further constrain the couplings and masses of new vector leptoquarks and to set lower limits on compositeness scales. C1 RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. UNIV INSTELLING ANTWERP,B-2610 WILRIJK,BELGIUM. FREE UNIV BRUSSELS,INTERUNIV INST HIGH ENERGIES,BRUSSELS,BELGIUM. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. INST NUCL PHYS,KRAKOW,POLAND. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND,GERMANY. CENS,CEA,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW,LANARK,SCOTLAND. DESY,W-2000 HAMBURG,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 1,HAMBURG,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG,GERMANY. UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,HEIDELBERG,GERMANY. CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,KOSICE 04353,SLOVAKIA. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. LUND UNIV,DEPT PHYS,LUND,SWEDEN. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW 117259,RUSSIA. PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA. UNIV AIX MARSEILLE 2,CPPM,CNRS,IN2P3,MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY. UNIV PARIS 11,LAL,CNRS,IN2P3,ORSAY,FRANCE. ECOLE POLYTECH,LPNHE,CNRS,IN2P3,PALAISEAU,FRANCE. UNIV PARIS 06,LPNHE,CNRS,IN2P3,PARIS,FRANCE. UNIV PARIS 07,LPNHE,CNRS,IN2P3,PARIS,FRANCE. ACAD SCI CZECH REPUBL,INST PHYS,PRAGUE,CZECH REPUBLIC. CHARLES UNIV,CTR NUCL,PRAGUE,CZECH REPUBLIC. UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. UNIV ROMA LA SAPIENZA,INFN ROMA,ROME,ITALY. PAUL SCHERRER INST,VILLIGEN,SWITZERLAND. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL,GERMANY. DESY,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY. ETH ZURICH,INST TEILCHENPHYS,ZURICH,SWITZERLAND. UNIV ZURICH,INST PHYS,ZURICH,SWITZERLAND. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP AHMED, T (reprint author), UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RI Cvach, Jaroslav/G-6269-2014; Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015; Gogitidze, Nelli/N-1224-2015; Belousov, Anatoli/N-2102-2015; Vazdik, Iakov/N-2624-2015; Gorelov, Igor/J-9010-2015; Sheviakov, Igor/N-2735-2015; Danilov, Mikhail/C-5380-2014; Kotelnikov, Sergey/A-9711-2014 OI Erdmann, Martin/0000-0002-1653-1303; Meyer, Curtis/0000-0001-7599-3973; Beck, Hans Peter/0000-0001-7212-1096; Bassler, Ursula/0000-0002-9041-3057; Soloviev, Yury/0000-0003-1136-2827; Gorelov, Igor/0000-0001-5570-0133; Sheviakov, Igor/0000-0002-1659-3483; Danilov, Mikhail/0000-0001-9227-5164; Kotelnikov, Sergey/0000-0002-8027-4612 NR 48 TC 37 Z9 37 U1 0 U2 1 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 DEC PY 1994 VL 64 IS 4 BP 545 EP 558 PG 14 WC Physics, Particles & Fields SC Physics GA PZ697 UT WOS:A1994PZ69700002 ER PT J AU SHAPIRO, DB PAQUETTE, SJ ESQUERRA, RM CHE, DP GOLDBECK, RA HIRSCH, RE MOHANDAS, N KLIGER, DS AF SHAPIRO, DB PAQUETTE, SJ ESQUERRA, RM CHE, DP GOLDBECK, RA HIRSCH, RE MOHANDAS, N KLIGER, DS TI NANOSECOND ABSORPTION STUDY OF KINETICS ASSOCIATED WITH CARBON-MONOXIDE REBINDING TO HEMOGLOBIN-S AND HEMOGLOBIN-C FOLLOWING LIGAND PHOTOLYSIS SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID SINGULAR VALUE DECOMPOSITION AB The absorption spectra of photolysis intermediates of the CO complex of hemoglobin S and hemoglobin C, in the tetramer form, have been measured between 10 ns and 200 ms after excitation. These data were analyzed using singular value decomposition (SVD) and global analysis to determine kinetic lifetimes associated with various processes involved in CO recombination. The results of this analysis show that, in the tetramer (non-aggregated) form, hemoglobin S and hemoglobin C exhibit the same kinetics associated with CO recombination as hemoglobin A. (C) 1994 Academic Press, Inc. C1 UNIV CALIF SANTA CRUZ,DEPT CHEM & BIOCHEM,SANTA CRUZ,CA 95064. YESHIVA UNIV ALBERT EINSTEIN COLL MED,DEPT MED,DIV HEMATOL,BRONX,NY 10461. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CELLULAR & MOLEC BIOL,BERKELEY,CA 94720. FU NHLBI NIH HHS [HL38655, F32 HL0896901A1, HL31579] NR 22 TC 10 Z9 10 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD NOV 30 PY 1994 VL 205 IS 1 BP 154 EP 160 DI 10.1006/bbrc.1994.2643 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PW785 UT WOS:A1994PW78500024 PM 7999016 ER PT J AU DOOLEY, TP MITCHISON, HM MUNROE, PB PROBST, P NEAL, M SICILIANO, MJ DENG, ZM DOGGETT, NA CALLEN, DF GARDINER, RM MOLE, SE AF DOOLEY, TP MITCHISON, HM MUNROE, PB PROBST, P NEAL, M SICILIANO, MJ DENG, ZM DOGGETT, NA CALLEN, DF GARDINER, RM MOLE, SE TI MAPPING OF 2 PHENOL SULFOTRANSFERASE GENES, STP AND STM, TO 16P - CANDIDATE GENES FOR BATTEN-DISEASE SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID HUMAN CHROMOSOME-16; PHYSICAL MAP; HUMAN BRAIN; SULFOTRANSFERASE; PURIFICATION; FORM; CDNA AB The cytosolic phenol sulphotransferase gene (STP) was mapped to a region of chromosome 16, within the interval defined by human-rodent somatic cell hybrid breakpoints CY160(D) and CY12, which contains FRA16E. YAC and cosmid clones from this 16p interval were screened for the presence of STP. Two non-overlapping cosmid contigs were identified which contain STP-like sequences. Sequencing of these STP-like sequences confirmed that STP is contained within contig 343.1 and maps proximal to FRA16E, and that a related sulphotransferase STM,encoding the catecholamine-sulphating enzyme, is contained within contig 55.4 and maps to the adjacent hybrid interval CY12-CY180A. Thus two phenol sulphotransferase genes (STP and STM) have been finely localised to chromosome 16p12.1-p11.2, to the same region as CLN3, the gene for Batten disease. Both genes are therefore candidate genes for Batten disease. (C) 1994 Academic Press, Inc. C1 UNIV LONDON,SCH MED,RAYNE INST,DEPT PAEDIAT,LONDON WC1E 6JJ,ENGLAND. SW FDN BIOMED RES,DEPT GENET,SAN ANTONIO,TX. MD ANDERSON CANC CTR,DEPT MOLEC GENET,HOUSTON,TX. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. ADELAIDE CHILDRENS HOSP INC,DEPT CYTOGENET & MOLEC GENET,ADELAIDE,SA,AUSTRALIA. RI Mitchison, Hannah/C-1891-2008; Callen, David/G-1975-2012 NR 23 TC 37 Z9 37 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD NOV 30 PY 1994 VL 205 IS 1 BP 482 EP 489 DI 10.1006/bbrc.1994.2691 PG 8 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PW785 UT WOS:A1994PW78500072 PM 7999068 ER PT J AU GLESNE, DA HUBERMAN, E AF GLESNE, DA HUBERMAN, E TI CLONING AND SEQUENCE OF THE HUMAN TYPE-II IMP DEHYDROGENASE GENE SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID HUMAN NORMAL LYMPHOCYTES; CELL-DIFFERENTIATION; EXPRESSION; TRANSCRIPTION; PROLIFERATION; INDUCTION; LINES; CDNAS AB Human type IT inosine 5'-monophosphate dehydrogenase (EC 1.1.1.205) is the rate-limiting enzyme in de novo guanine nucleotide biosynthesis. Regulated inosine 5'-monophosphate dehydrogenase activity is associated with cellular proliferation, transformation, and differentiation. We cloned and sequenced the entire gene for type TI inosine 5'-monophosphate dehydrogenase and here provide details regarding the organization of the gene and its transcriptional start sites. The gene spans approximately 5 kb and is disrupted by 12 introns. The transcriptional start sites were determined by S1 nuclease mapping to be somewhat heterogeneous but predominated at 102 and 85 nucleotides from the translational initiation codon. (C) 1994 Academic Press, Inc. C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. UNIV CHICAGO,DEPT MOLEC GENET & CELL BIOL,CHICAGO,IL 60637. UNIV CHICAGO,COMM GENET,CHICAGO,IL 60637. NR 26 TC 8 Z9 9 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 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD NOV 30 PY 1994 VL 205 IS 1 BP 537 EP 544 DI 10.1006/bbrc.1994.2698 PG 8 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PW785 UT WOS:A1994PW78500079 PM 7999076 ER PT J AU INGBER, MS WOMBLE, DE MONDY, LA AF INGBER, MS WOMBLE, DE MONDY, LA TI A PARALLEL BOUNDARY-ELEMENT FORMULATION FOR DETERMINING EFFECTIVE PROPERTIES OF HETEROGENEOUS MEDIA SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING LA English DT Article ID DISTRIBUTED-MEMORY MULTIPROCESSOR; FACTORIZATION; SEDIMENTATION; SYSTEMS; ALGORITHMS; PARTICLES; MATRIX AB This paper presents a parallel implementation of the boundary element method for MIMD computer architectures to determine the effective properties of two heterogeneous physical systems. The first physical system is comprised of spheres sedimenting in a viscous fluid at low Reynolds numbers. The effective property is characterized by the hindered settling function which is a measure of the average sedimentation velocity. The second physical system is a short-fibre reinforced composite. The effective property for this system is the composite modulus. The determination of effective properties of heterogeneous media requires performing statistical analyses of several realizations of physical systems based on defining characteristics of the media. The boundary element method is particularly well suited for studying such systems because of the simplification in the discretization associated with the method. However, as the number of heterogeneities to be modeled is increased so are the computational demands. Parallel computation offers the opportunity to model systems of greater complexity. We discuss a parallel boundary element formulation based on the torus-wrap mapping. In this approach, blocks of the coefficient matrix associated with the discretized boundary element equations are assigned to processors as opposed to more traditional parallel boundary element implementations where rows or columns are assigned to processors. The torus-wrap mapping can be shown to minimize communication volume between processors during the LU factorization. Therefore, the present formulation scales well with increases in the number of processors. C1 SANDIA NATL LABS,DEPT APPL NUMER MATH,ALBUQUERQUE,NM 87185. SANDIA NATL LABS,DEPT ENERGET MAT & FLUID MECH,ALBUQUERQUE,NM 87185. RP INGBER, MS (reprint author), UNIV NEW MEXICO,DEPT MECH ENGN,ALBUQUERQUE,NM 87131, USA. NR 30 TC 14 Z9 14 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0029-5981 J9 INT J NUMER METH ENG JI Int. J. Numer. Methods Eng. PD NOV 30 PY 1994 VL 37 IS 22 BP 3905 EP 3919 DI 10.1002/nme.1620372209 PG 15 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA PU234 UT WOS:A1994PU23400007 ER PT J AU JIANG, DT HEALD, SM SHAM, TK STILLMAN, MJ AF JIANG, DT HEALD, SM SHAM, TK STILLMAN, MJ TI STRUCTURES OF THE CADMIUM, MERCURY, AND ZINC THIOLATE CLUSTERS IN METALLOTHIONEIN - XAFS STUDY OF ZN-7-MT, CD-7-MT, HG-7-MT, AND HG-18-MT FORMED FROM RABBIT LIVER METALLOTHIONEIN-2 SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID X-RAY-ABSORPTION; CIRCULAR-DICHROISM; FINE-STRUCTURE; SILVER BINDING; BETA-DOMAIN; EXAFS; COMPLEXES; COPPER; SITES; CD AB The structural properties of zinc, cadmium, and mercury metallothioneins (MT) have been studied at 77 K using X-ray absorption fine structure spectroscopy (XAFS). The nearest neighbor bond lengths and coordination numbers for Zn(7)MT 2 and Cd-7-MT 2 are in close agreement with the previously reported values. Strikingly different structural parameters have been obtained for the mercury-containing metallothioneins. For Hg-7-MT 2 the nearest neighbor Hg-S bond length and coordination number are determined to be 2.33 +/- 0.02 Angstrom and 2, respectively. A new structure is proposed for Hg-7-MT 2 formed by addition of Hg2+ to Zn-7-MT at pH 7 in which each Hg(Il) is coordinated by four thiolate sulfur but with two unusually short bonds and two unusually long bonds which exhibit a much larger disorder than the shorter bonds. For the Hg-18-MT 2 species formed by adding Hg2+ to apo-MT 2 at pH 2, the local structure is shown to involve nearest neighbor Hg-S bond lengths of 2.42 +/- 0.026 Angstrom with 2-fold sulfur coordination plus an Hg-Cl shell at 2.57 +/- 0.03 Angstrom with an apparent coordination number 0.61 and large disorder. C1 UNIV WESTERN ONTARIO, DEPT CHEM, LONDON N6A 5B7, ON, CANADA. BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. RI Stillman, Martin/O-3191-2016 OI Stillman, Martin/0000-0001-6799-7560 NR 57 TC 73 Z9 76 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD NOV 30 PY 1994 VL 116 IS 24 BP 11004 EP 11013 DI 10.1021/ja00103a016 PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA PX309 UT WOS:A1994PX30900016 ER PT J AU BOESE, R HARVEY, DF MALASKA, MJ VOLLHARDT, KPC AF BOESE, R HARVEY, DF MALASKA, MJ VOLLHARDT, KPC TI [2+2+2]CYCLOADDITIONS OF ALKYNES TO FURANS AND THIOPHENES - A COBALT-MEDIATED ENOL ETHER WALK SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID DIELS-ALDER REACTION; ORGANIC-SYNTHESIS; 2,3-DOUBLE BOND; ADDITIONS; NUCLEUS; ENTRY; CONSTRUCTION; DERIVATIVES; CHEMISTRY; DIENES C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV ESSEN GESAMTHSCH,INST INORGAN CHEM,D-45141 ESSEN,GERMANY. OI Malaska, Michael/0000-0003-0064-5258 NR 44 TC 36 Z9 36 U1 0 U2 4 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 NOV 30 PY 1994 VL 116 IS 24 BP 11153 EP 11154 DI 10.1021/ja00103a039 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA PX309 UT WOS:A1994PX30900039 ER PT J AU HIGASHI, K NIEH, TG WADSWORTH, J AF HIGASHI, K NIEH, TG WADSWORTH, J TI A COMPARATIVE-STUDY OF SUPERPLASTICITY AND CAVITATION IN MECHANICALLY-ALLOYED IN9021 AND A SICP/IN9021 COMPOSITE SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID ALUMINUM COMPOSITE AB The superplastic properties and cavitation behavior of a mechanically-alloyed 15 vol.% SiCp/IN9021 composite and IN9021 alloy have been both investigated. Both materials exhibited superplasticity at extremely high strain rates (5-300 s(-1)) at 823 K. It was found that the optimum superplastic strain rate for the largest elongation does not coincide with the strain rate for the maximum value of the strain rate sensitivity exponent. This discrepancy is proposed to be associated with cavitation behavior. In the composite, cavities preferentially initiate at the ends of particulate reinforcements and parallel to the applied stress. These cavities subsequently grow, coalesce, and eventually led to premature failure. Experimental results indicate that cavity growth is plasticity-controlled and can be described by a model proposed by Stowell. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HIGASHI, K (reprint author), UNIV OSAKA PREFECTURE,COLL ENGN,DEPT MECH & SYST ENGN,SAKAI,OSAKA 593,JAPAN. RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 12 TC 27 Z9 28 U1 0 U2 0 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 NOV 30 PY 1994 VL 188 IS 1-2 BP 167 EP 173 DI 10.1016/0921-5093(94)90369-7 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PU058 UT WOS:A1994PU05800019 ER PT J AU MEGGERS, K PRIESMEYER, HG TRELA, WJ DAHMS, M AF MEGGERS, K PRIESMEYER, HG TRELA, WJ DAHMS, M TI INVESTIGATION OF THE AUSTENITE-BAINITE TRANSFORMATION IN GRAY IRON USING REAL-TIME NEUTRON TRANSMISSION SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article AB In globulitic gray iron (3.6 wt.% C, 2.4 wt.% Si and 0.45 wt.% Mn) the decomposition of austenite into bainite is investigated in real time using a new method based on neutron scattering. During the phase transformation transmission spectra of thermal neutrons are continuously recorded containing specific Bragg edges. Thus, the transformation is followed in-situ time resolved by evaluating the relative (micro)structural fractions of the transforming phases from the heights of the corresponding Bragg edges. The progression of the transformation is described and the results are discussed. The observed late time deviations from the Avrami law are explained by residual stresses of the second kind (homogeneous microstresses), which occur during the transformation because of the different specific volumes of the phases. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH,RES CTR,D-21502 GEESTHACHT,GERMANY. RP MEGGERS, K (reprint author), CHRISTIAN ALBRECHTS UNIV KIEL,INST PHYS NUCL,GUTENBERGSTR 76-78,D-24118 KIEL,GERMANY. NR 15 TC 9 Z9 9 U1 1 U2 6 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 NOV 30 PY 1994 VL 188 IS 1-2 BP 301 EP 304 DI 10.1016/0921-5093(94)90385-9 PG 4 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PU058 UT WOS:A1994PU05800035 ER PT J AU YU, YG THORGEIRSSON, TE SHIN, YK AF YU, YG THORGEIRSSON, TE SHIN, YK TI TOPOLOGY OF AN AMPHIPHILIC MITOCHONDRIAL SIGNAL SEQUENCE IN THE MEMBRANE-INSERTED STATE - A SPIN-LABELING STUDY SO BIOCHEMISTRY LA English DT Article ID PHASE PEPTIDE-SYNTHESIS; INNER MEMBRANE; IMPORT; PROTEINS; PRESEQUENCE; CONFORMATION; RESONANCE; VESICLES; MUTANTS; HELICES AB To investigate the interaction of the presequence of the precursor of yeast cytochrome C oxidase subunit IV (COX IV) with phospholipid membranes, a series of single- and double-cysteine-substituted peptide variants derived from the 25-residue NH2-terminal presequence has been synthesized and modified with nitroxide spin labels. The immersion depth, orientation, and secondary structure of the peptide in the POPC bilayer containing 10 mol % POPG were determined using electron paramagnetic resonance (EPR) spectroscopy. EPR saturation analysis of singly labeled variants reveals that the nitroxides attached to the NH2-terminal region of the peptide insert into the acyl chain region of the bilayer, approximately 13 Angstrom deep from the membrane surface. EPR line shape analysis of doubly labeled variants indicates that the peptide predominantly exists as an extended conformation, with little secondary structure. The experimental results, together with the energetic consideration of peptide-bilayer interactions, suggest that the presequence is located near the interface between the head group region and the acyl chain region, such that the hydrophobic side chains are solvated by the acyl chains and the charged side chains extended toward the polar environment at the bilayer surface. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV STRUCT BIOL,BERKELEY,CA 94720. OI Thorgeirsson, Thorgeir/0000-0002-5149-7040 FU NIGMS NIH HHS [GM51290-01] NR 31 TC 45 Z9 46 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 29 PY 1994 VL 33 IS 47 BP 14221 EP 14226 DI 10.1021/bi00251a034 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PU760 UT WOS:A1994PU76000034 PM 7947833 ER PT J AU JIA, QX WU, XD REAGER, D FOLTYN, SR MOMBOURQUETTE, C TIWARI, P CAMPBELL, IH HOULTON, RJ PETERSON, DE AF JIA, QX WU, XD REAGER, D FOLTYN, SR MOMBOURQUETTE, C TIWARI, P CAMPBELL, IH HOULTON, RJ PETERSON, DE TI HIGH-TEMPERATURE SUPERCONDUCTOR JOSEPHSON-JUNCTIONS WITH A GRADIENT PR-DOPED Y1-XPRXBA2CU3O7-DELTA (X=0.1, 0.3, 0.5) AS BARRIERS SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSPORT-PROPERTIES; LASER DEPOSITION; EDGE JUNCTIONS; THIN-FILMS; DC SQUIDS; YBA2CU3O7; LINKS RP LOS ALAMOS NATL LAB, CTR SUPERCONDUCT TECHNOL, LOS ALAMOS, NM 87545 USA. RI Jia, Q. X./C-5194-2008 NR 18 TC 15 Z9 16 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0003-6951 EI 1077-3118 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD NOV 28 PY 1994 VL 65 IS 22 BP 2866 EP 2868 DI 10.1063/1.112518 PG 3 WC Physics, Applied SC Physics GA PU404 UT WOS:A1994PU40400037 ER PT J AU NORTON, DP BUDAI, JD LOWNDES, DH CHAKOUMAKOS, BC AF NORTON, DP BUDAI, JD LOWNDES, DH CHAKOUMAKOS, BC TI SRCUO2 (SR,CA)CUO2 SUPERLATTICE GROWTH BY PULSED-LASER DEPOSITION SO APPLIED PHYSICS LETTERS LA English DT Article ID CA1-XSRXCUO2 THIN-FILMS; MOLECULAR-BEAM EPITAXY; CU-O SYSTEM; UNIT-CELL; LAYER; SUPERCONDUCTIVITY; CRYSTAL; SR; SRCUO2 RP NORTON, DP (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Chakoumakos, Bryan/A-5601-2016; Budai, John/R-9276-2016 OI Chakoumakos, Bryan/0000-0002-7870-6543; Budai, John/0000-0002-7444-1306 NR 25 TC 26 Z9 26 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 NOV 28 PY 1994 VL 65 IS 22 BP 2869 EP 2871 DI 10.1063/1.112519 PG 3 WC Physics, Applied SC Physics GA PU404 UT WOS:A1994PU40400038 ER PT J AU LUKE, PN AF LUKE, PN TI SINGLE-POLARITY CHARGE SENSING IN IONIZATION DETECTORS USING COPLANAR ELECTRODES SO APPLIED PHYSICS LETTERS LA English DT Article RP LUKE, PN (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENGN,BERKELEY,CA 94720, USA. NR 5 TC 200 Z9 206 U1 4 U2 14 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 NOV 28 PY 1994 VL 65 IS 22 BP 2884 EP 2886 DI 10.1063/1.112523 PG 3 WC Physics, Applied SC Physics GA PU404 UT WOS:A1994PU40400043 ER PT J AU GLENZER, S WRUBEL, T BUSCHER, S KUNZE, HJ GODBERT, L CALISTI, A STAMM, R TALIN, B NASH, J LEE, RW KLEIN, L AF GLENZER, S WRUBEL, T BUSCHER, S KUNZE, HJ GODBERT, L CALISTI, A STAMM, R TALIN, B NASH, J LEE, RW KLEIN, L TI SPECTRAL-LINE PROFILES OF N=4 TO N=5 TRANSITIONS IN C-IV, N-V AND O-VI SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID LITHIUM-LIKE; PLASMA; DENSITY; PINCH; IONS AB We report on measurements of Stark profiles of the n = 4 to n = 5 transitions in the lithium-like ions C IV, N V and O VI. The measurements were performed in a plasma of the gasliner pinch discharge where electron densities and temperatures are determined independently by 90-degrees Thomson scattering. The comparison of the experimental data with theoretical calculations shows good agreement for all spectra especially when ion dynamics effects are taken into account. C1 UNIV PROVENCE,CTR ST JEROME,P2IM,F-13397 MARSEILLE 20,FRANCE. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP GLENZER, S (reprint author), RUHR UNIV,INST EXPTL PHYS 5,D-44780 BOCHUM,GERMANY. OI Calisti, Annette/0000-0001-6727-9286 NR 32 TC 18 Z9 18 U1 0 U2 1 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 NOV 28 PY 1994 VL 27 IS 22 BP 5507 EP 5515 DI 10.1088/0953-4075/27/22/010 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA PV228 UT WOS:A1994PV22800010 ER PT J AU TEPEHAN, GG SIEGMANN, B MADEHEIM, H HIPPLER, R KIMURA, M AF TEPEHAN, GG SIEGMANN, B MADEHEIM, H HIPPLER, R KIMURA, M TI COHERENT EXCITATION OF H(N=2) INDUCED IN H+ NE AND H+ AL COLLISIONS SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID CHARGE-TRANSFER COLLISIONS; LYMAN-ALPHA RADIATION; DENSITY-MATRICES; HE COLLISIONS; ATOMS; POLARIZATION; H(2P); AR; HYDROGEN; IMPACT AB The collision-induced excitation of atomic hydrogen to the H(n =2) states in H+-Ne and H+-Ar collisions was measured in an energy range of 1 to 25 keV. From a polarization analysis of the emitted Lyman-alpha radiation as a function of an external electric field the partial cross sections sigma(lm) for excitation to the H(2s) and the H(2pm) magnetic substates (m = 0, +/- 1) and the real part of the s0-p0 coherence were extracted. For both collision systems an energy dependent forward-backward asymmetry corresponding to a shift of the centre-of-charge relative to the centre-of-mass (electric dipole moment) was observed. The collision-induced electric dipole moment (D(z)) is generally small or negative at incident energies below 10 keV and rises steeply towards higher energies. The present results are in reasonable agreement with own close-coupling calculations employing a molecular representation. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. TECH UNIV ISTANBUL,FAC SCI & LETT,DEPT PHYS,ISTANBUL 80626,TURKEY. RP TEPEHAN, GG (reprint author), UNIV BIELEFELD,FAK PHYS,POSTFACH 100131,D-33501 BIELEFELD,GERMANY. RI Hippler, Rainer/A-2790-2013 OI Hippler, Rainer/0000-0002-5956-3321 NR 28 TC 4 Z9 4 U1 0 U2 0 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 NOV 28 PY 1994 VL 27 IS 22 BP 5527 EP 5535 DI 10.1088/0953-4075/27/22/012 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA PV228 UT WOS:A1994PV22800012 ER PT J AU USMAR, SG BIASINI, M MOODENBAUGH, AR XU, Y FRETWELL, HM AF USMAR, SG BIASINI, M MOODENBAUGH, AR XU, Y FRETWELL, HM TI POSITRON STATES IN PURE AND FE DOPED POLYCRYSTALLINE YBA2CU3O7-DELTA SUPERCONDUCTORS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID NEUTRON POWDER DIFFRACTION; BA-CU-O; OXYGEN VACANCIES; ANNIHILATION CHARACTERISTICS; TEMPERATURE-DEPENDENCE; LIFETIME SPECTROSCOPY; CRYSTAL-STRUCTURE; TC; TRANSITION; PARAMETERS AB The temperature dependences of bulk positron annihilation parameters for pure and Fe doped YBa2Cu3O7-delta are considered in the context of temperature dependent positron trapping. Data for samples of composition YBa2(Cu1-xFe(x))3O7-delta with x = 0.0, 0.005, 0.01, 0.02 and 0.03 are reported. Shallow traps with positron binding energies of 0.06 +/- 0.01 eV and 0.16 +/- 0.01 eV were identified for samples with x less-than-or-equal-to 0.01 and x = 0.02 respectively. It is demonstrated that the data in the literature can be explained qualitatively by the presence of such traps and that the initial observation of a correlation between bulk positron annihilation parameters and superconductivity was coincidental. C1 ENEA,I-40138 BOLOGNA,ITALY. SDSM&T,DEPT PHYS,RAPID CITY,SD 57701. BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973. RP USMAR, SG (reprint author), UNIV BRISTOL,HH WILLS PHYS LAB,TYNDALL AVE,BRISTOL BS8 1TL,AVON,ENGLAND. OI Moodenbaugh, Arnold/0000-0002-3415-6762 NR 55 TC 4 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 NOV 28 PY 1994 VL 6 IS 48 BP 10487 EP 10497 DI 10.1088/0953-8984/6/48/010 PG 11 WC Physics, Condensed Matter SC Physics GA PV226 UT WOS:A1994PV22600010 ER PT J AU IKEDA, H FERNANDEZBACA, JA NICKLOW, RM TAKAHASHI, M IWASA, K AF IKEDA, H FERNANDEZBACA, JA NICKLOW, RM TAKAHASHI, M IWASA, K TI FRACTON EXCITATIONS IN A DILUTED HEISENBERG-ANTIFERROMAGNET NEAR THE PERCOLATION-THRESHOLD - RBMN0.39MG0.61F3 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID SPIN-WAVES; CROSSOVER AB Using neutron inelastic scattering techniques we investigated the magnetic excitations in a diluted Heisenberg antiferromagnet (RbMn(c)Mg1-cF3 with c = 0.39) close to the percolation threshold of c(p) = 0.312. No indication of propagating spin waves was observed throughout the Brillouin zone, but a broad peak superimposed on Ising-cluster excitations was observed. The origin of this broad peak is attributed to the excitation of fractons in a percolating network. C1 KEIO UNIV,DEPT PHYS,YOKOHAMA,KANAGAWA 223,JAPAN. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP IKEDA, H (reprint author), NATL LAB HIGH ENERGY PHYS,BOOSTER SYNCHROTRON UTILIZAT FACIL,OHO 1-1,TSUKUBA,IBARAKI 305,JAPAN. RI Fernandez-Baca, Jaime/C-3984-2014 OI Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 12 TC 14 Z9 14 U1 0 U2 1 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 NOV 28 PY 1994 VL 6 IS 48 BP 10543 EP 10549 DI 10.1088/0953-8984/6/48/015 PG 7 WC Physics, Condensed Matter SC Physics GA PV226 UT WOS:A1994PV22600015 ER PT J AU PIETRALLA, N VONBRENTANO, P CASTEN, RF OTSUKA, T ZAMFIR, NV AF PIETRALLA, N VONBRENTANO, P CASTEN, RF OTSUKA, T ZAMFIR, NV TI DISTRIBUTION OF LOW-LYING QUADRUPOLE PHONON STRENGTH IN NUCLEI SO PHYSICAL REVIEW LETTERS LA English DT Article ID INTERACTING BOSON APPROXIMATION; DEFORMED-NUCLEI; EXCITATIONS; STATES; TRANSITIONS; SYMMETRY; CD-114; BANDS C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN. CLARK UNIV,WORCESTER,MA 01610. INST ATOM PHYS,BUCHAREST,ROMANIA. RP PIETRALLA, N (reprint author), UNIV COLOGNE,INST KERNPHYS,D-50937 COLOGNE,GERMANY. RI Zamfir, Nicolae Victor/F-2544-2011; OTSUKA, TAKAHARU/G-5072-2014 NR 22 TC 51 Z9 51 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 NOV 28 PY 1994 VL 73 IS 22 BP 2962 EP 2965 DI 10.1103/PhysRevLett.73.2962 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700006 ER PT J AU HUANG, H ALESSI, JG BEDDO, M BROWN, KA BUNCE, G CAUSSYN, DD GROSNICK, D KPONOU, AE LEE, SY LI, D LOPIANO, D LUCCIO, AU MAKDISI, YI RATNER, L REECE, K ROSER, T SPINKA, H UFIMTSEV, AG UNDERWOOD, DG VANASSELT, W WILLIAMS, NW YOKOSAWA, A AHRENS, L AF HUANG, H ALESSI, JG BEDDO, M BROWN, KA BUNCE, G CAUSSYN, DD GROSNICK, D KPONOU, AE LEE, SY LI, D LOPIANO, D LUCCIO, AU MAKDISI, YI RATNER, L REECE, K ROSER, T SPINKA, H UFIMTSEV, AG UNDERWOOD, DG VANASSELT, W WILLIAMS, NW YOKOSAWA, A AHRENS, L TI PRESERVATION OF PROTON POLARIZATION BY A PARTIAL SIBERIAN SNAKE SO PHYSICAL REVIEW LETTERS LA English DT Article ID DEPOLARIZING RESONANCES; ACCELERATION; BEAM C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109. INST HIGH ENERGY PHYS,PROTVINO,RUSSIA. RP HUANG, H (reprint author), INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405, USA. NR 20 TC 53 Z9 53 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 NOV 28 PY 1994 VL 73 IS 22 BP 2982 EP 2985 DI 10.1103/PhysRevLett.73.2982 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700011 ER PT J AU WERNER, PW SCHAMILOGLU, E SMITH, JR STRUVE, KW LIPINSKI, RJ AF WERNER, PW SCHAMILOGLU, E SMITH, JR STRUVE, KW LIPINSKI, RJ TI EROSION OF A RELATIVISTIC ELECTRON-BEAM PROPAGATING IN A PLASMA CHANNEL SO PHYSICAL REVIEW LETTERS LA English DT Article ID ION-HOSE INSTABILITY; LASER C1 UNIV NEW MEXICO,DEPT ELECT & COMP ENGN,ALBUQUERQUE,NM 87131. TITAN TECHNOL,DIV SPECTRON,ALBUQUERQUE,NM 87131. MISSION RES CORP,ALBUQUERQUE,NM 87106. RP WERNER, PW (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 20 TC 7 Z9 7 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 NOV 28 PY 1994 VL 73 IS 22 BP 2986 EP 2989 DI 10.1103/PhysRevLett.73.2986 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700012 ER PT J AU WILKS, S YOUNG, PE HAMMER, J TABAK, M KRUER, WL AF WILKS, S YOUNG, PE HAMMER, J TABAK, M KRUER, WL TI SPREADING OF INTENSE LASER-BEAMS DUE TO FILAMENTATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCALE-LENGTH PLASMAS; SMOOTHING TECHNIQUES; LIGHT RP WILKS, S (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. NR 27 TC 65 Z9 66 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 NOV 28 PY 1994 VL 73 IS 22 BP 2994 EP 2997 DI 10.1103/PhysRevLett.73.2994 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700014 ER PT J AU NARAYANAN, T PITZER, KS AF NARAYANAN, T PITZER, KS TI MEAN-FIELD TO ISING CROSSOVER IN IONIC FLUIDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID BINARY-LIQUID MIXTURES; CRITICAL-EXPONENT; CRITICAL-BEHAVIOR; NEUTRON-SCATTERING; COEXISTENCE CURVE; CRITICAL-POINT; POLYMER BLEND; SUSCEPTIBILITY; TRANSITION C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP NARAYANAN, T (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 29 TC 59 Z9 60 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 NOV 28 PY 1994 VL 73 IS 22 BP 3002 EP 3005 DI 10.1103/PhysRevLett.73.3002 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700016 ER PT J AU RAMIREZ, AP CHANDRA, P COLEMAN, P FISK, Z SMITH, JL OTT, HR AF RAMIREZ, AP CHANDRA, P COLEMAN, P FISK, Z SMITH, JL OTT, HR TI NONLINEAR SUSCEPTIBILITY - A DIRECT TEST OF THE QUADRUPOLAR KONDO EFFECT IN UBE13 SO PHYSICAL REVIEW LETTERS LA English DT Article ID FERMION COMPOUND UBE13; PHENOMENOLOGICAL THEORY; LIQUID BEHAVIOR; SPIN-GLASSES; NORMAL-STATE; SUPERCONDUCTORS; TEMPERATURE; PRESSURE; SYSTEMS; ION C1 NEC RES INST,PRINCETON,NJ 08540. RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08854. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. ETH HONGGERBERG,CH-8093 ZURICH,SWITZERLAND. RP RAMIREZ, AP (reprint author), AT&T BELL LABS,600 MTN AVE,MURRAY HILL,NJ 07974, USA. NR 45 TC 53 Z9 53 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 NOV 28 PY 1994 VL 73 IS 22 BP 3018 EP 3021 DI 10.1103/PhysRevLett.73.3018 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700020 ER PT J AU ZHU, YM MOODENBAUGH, AR CAI, ZX TAFTO, J SUENAGA, M WELCH, DO AF ZHU, YM MOODENBAUGH, AR CAI, ZX TAFTO, J SUENAGA, M WELCH, DO TI TETRAGONAL-ORTHORHOMBIC STRUCTURAL MODULATION AT LOW-TEMPERATURE IN LA2-XBAXCUO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTIVITY; LATTICE INSTABILITIES; LA2-XSRXCUO4 RP ZHU, YM (reprint author), BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973, USA. OI Moodenbaugh, Arnold/0000-0002-3415-6762 NR 14 TC 39 Z9 39 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 NOV 28 PY 1994 VL 73 IS 22 BP 3026 EP 3029 DI 10.1103/PhysRevLett.73.3026 PG 4 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700022 ER PT J AU BINDER, PM PRIVMAN, V AF BINDER, PM PRIVMAN, V TI 2ND-ORDER DYNAMICS IN THE COLLECTIVE TEMPORAL EVOLUTION OF COMPLEX-SYSTEMS - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Note ID CELLULAR AUTOMATA; BEHAVIOR C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. CLARKSON UNIV,DEPT PHYS,POTSDAM,NY 13699. RP BINDER, PM (reprint author), SANTA FE INST,1660 OLD PECOS TRAIL,SUITE A,SANTA FE,NM 87501, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 28 PY 1994 VL 73 IS 22 BP 3039 EP 3039 DI 10.1103/PhysRevLett.73.3039 PG 1 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700026 ER PT J AU NORMAN, MR AF NORMAN, MR TI SYMMETRY OF THE GAP IN BI2212 FROM PHOTOEMISSION SPECTROSCOPY SO PHYSICAL REVIEW LETTERS LA English DT Note RP NORMAN, MR (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Norman, Michael/C-3644-2013 NR 3 TC 7 Z9 7 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 NOV 28 PY 1994 VL 73 IS 22 BP 3044 EP 3044 DI 10.1103/PhysRevLett.73.3044 PG 1 WC Physics, Multidisciplinary SC Physics GA PT997 UT WOS:A1994PT99700031 ER PT J AU PACK, RT AF PACK, RT TI CONFORMALLY EUCLIDEAN INTERNAL COORDINATE SPACE IN THE QUANTUM 3-BODY PROBLEM SO CHEMICAL PHYSICS LETTERS LA English DT Article ID REACTIVE SCATTERING; MOLECULAR-DYNAMICS; 3 PARTICLES; SYSTEMS; REPRESENTATION; STATES; OZONE AB The internal coordinate space for three particles of arbitrary mass is shown to be a three-dimensional conformally Euclidean space. This gives the internal kinetic energy operator a simple form and provides a unified view of the different hyperspherical coordinates used in quantum three-body problems. RP PACK, RT (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,T-12,MS B268,LOS ALAMOS,NM 87545, USA. NR 30 TC 4 Z9 4 U1 1 U2 2 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 NOV 25 PY 1994 VL 230 IS 3 BP 223 EP 227 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PT718 UT WOS:A1994PT71800002 ER PT J AU PROSHLYAKOV, DA OGURA, T SHINZAWAITOH, K YOSHIKAWA, S APPELMAN, EH KITAGAWA, T AF PROSHLYAKOV, DA OGURA, T SHINZAWAITOH, K YOSHIKAWA, S APPELMAN, EH KITAGAWA, T TI SELECTIVE RESONANCE RAMAN OBSERVATION OF THE 607 NM FORM GENERATED IN THE REACTION OF OXIDIZED CYTOCHROME-C-OXIDASE WITH HYDROGEN-PEROXIDE SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Note ID ELECTRON-PARAMAGNETIC-RESONANCE; HORSERADISH-PEROXIDASE; DIOXYGEN REDUCTION; ROOM-TEMPERATURE; COMPOUND-II; OXYGEN; FERRYL; SPECTROSCOPY; INTERMEDIATE; ACETONITRILE AB Resonance Raman spectra were measured selectively for the ''607 nm'' form, which had been assigned to a peroxy intermediate formed in the reaction of oxidized cytochrome c oxidase with hydrogen peroxide at ambient temperature. A single oxygen isotope-sensitive band was found at 803 cm(-1) for the reaction with (H2O2)-O-16 (at 769 cm(-1) with (H2O2)-O-18) upon excitation at 607 nm, the wave-length of the difference absorption maximum characteristic of the ''peroxy'' intermediate. Upon excitation at shorter wavelengths (down to 580 nm), the Raman spectrum simply became weaker without yielding any new features. When (H2OO)-O-16-O-18 was used, two bands were observed at 803 and 769 cm(-1) (within an accuracy of 0.5 cm(-1)), but with only half the intensity of those observed with (H2O2)-O-16 or (H2O2)-O-18, which ruled out the possibility that the 803 cm(-1) band arose from the O-O or Fe-O-2 stretching of the Fe-II(O-O-) heme. Conversely the 34-cm(-1) downshift with O-18 is in good agreement with the calculated O-16/O-18 Shift (35 cm(-1)) expected for the diatomic Fe=O-16 oscillator at 803 cm(-1). This band exhibited an upshift by 1.3 cm(-1) in (H2O)-H-2, similar to the case of compound II of horseradish peroxidase at neutral pH, and indicative of the presence of a hydrogen bond to the Fe-IV=O oxygen. The 803/769 cm(-1) pair of resonance Raman bands were also observed upon blue excitation, as is the case for the bands found in the dioxygen cycle of this enzyme (Ogura, T., Takahashi, S., Hirota, S., Shinzawa-Itoh, K., Yoshikawa, S., Appelman, E. H., and Kitagawa, T. (1993) J. Am. Chem. Sec. 115, 8527-8536). This observation provides the first direct characterization of the 607 nm form of this enzyme in its reaction with H2O2. C1 OKAZAKI NATL RES INST,GRAD UNIV ADV STUDIES,OKAZAKI,AICHI 444,JAPAN. OKAZAKI NATL RES INST,INST MOLEC SCI,OKAZAKI,AICHI 444,JAPAN. HIMEJI INST TECHNOL,FAC SCI,DEPT LIFE SCI,KAMIGORI,HYOGO 67812,JAPAN. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 35 TC 101 Z9 101 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 NOV 25 PY 1994 VL 269 IS 47 BP 29385 EP 29388 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PU284 UT WOS:A1994PU28400014 PM 7961916 ER PT J AU TENG, BB BLUMENTHAL, S FORTE, T NAVARATNAM, N SCOTT, J GOTTO, AM CHAN, L AF TENG, BB BLUMENTHAL, S FORTE, T NAVARATNAM, N SCOTT, J GOTTO, AM CHAN, L TI ADENOVIRUS-MEDIATED GENE-TRANSFER OF RAT APOLIPOPROTEIN-B MESSENGER-RNA-EDITING PROTEIN IN MICE VIRTUALLY ELIMINATES APOLIPOPROTEIN B-100 AND NORMAL LOW-DENSITY-LIPOPROTEIN PRODUCTION SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID MESSENGER-RNA; METABOLIC HETEROGENEITY; TRIGLYCERIDE-RICH; PLASMA-LEVELS; APOPROTEIN-B; EXPRESSION; HYPERCHOLESTEROLEMIA; RECEPTOR; VECTORS; THERAPY AB Apolipoprotein (apo) B-100 is the major protein component in low density lipoprotein (LDL); it contains the binding domain for the LDL receptor and the attachment site for apolipoprotein(a) in lipoprotein(a). ApoB-48 is colinear with the amino-terminal half of apoB-100 and misses the part of the molecule required for LDL receptor interaction and lipoprotein(a) formation. ApoB-48 mRNA is produced by the editing of apoB-100 mRNA, a process by which the codon CAA for Gln-2153 is changed to UAA, an in-frame stop codon. We used the cloned catalytic component of the rat apoB mRNA-editing enzyme (REPR) to construct a replication-defective recombinant adenoviral vector containing REPR cDNA (AvREPR) and a control vector (Av1LacZ4) containing a beta-galactosidase cDNA to investigate the effect of REPR gene delivery in C57BL/6 mice. Intravenous injection of AvREPR in mice resulted in efficient transduction of liver cells, where REPR mRNA and protein were overexpressed, reaching a peak at 7 and 12 days, returning toward control levels at 39 days after AvREPR administration. ApoB mRNA editing activity in liver extracts showed changes parallel to those of REPR mRNA expression; the proportion of edited apoB mRNA in the total hepatic apoB mRNA increased from similar to 60% to more than 90% at the peak of REPR expression. The proportion of plasma apoB-100 in AvREPR-transduced animals decreased from similar to 50% to <10% of total plasma apoB concentration. Plasma very low density lipoproteins were polydisperse in control animals with an average diameter of 54.9 +/- 20.6 mo (uninjected control) and 54.7 +/- 16.8 nn (Av1LacZ4-treated), respectively. They became much smaller (average diameter 39.3 +/- 12.7 nm) and more uniform in size at day 12 following AvREPR administration. On the same day, the normal plasma LDL (26.2-25.5 nm) was almost completely eliminated in treated animals. Adenovirus-mediated transfer of the REPR cDNA is an efficient method to reduce plasma apoB-100 and normal LDL production. C1 BAYLOR COLL MED,DEPT CELL BIOL,HOUSTON,TX 77030. METHODIST HOSP,HOUSTON,TX 77030. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. HAMMERSMITH HOSP,ROYAL POSTGRAD MED SCH,MRC,MOLEC MED GRP,LONDON W12 0NN,ENGLAND. RP TENG, BB (reprint author), BAYLOR COLL MED,DEPT MED,HOUSTON,TX 77030, USA. FU NHLBI NIH HHS [HL-18574, HL-27341] NR 53 TC 81 Z9 81 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 NOV 25 PY 1994 VL 269 IS 47 BP 29395 EP 29404 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PU284 UT WOS:A1994PU28400016 PM 7961918 ER PT J AU MICHLOVICH, ES VOGT, S MASARIK, J REEDY, RC ELMORE, D LIPSCHUTZ, ME AF MICHLOVICH, ES VOGT, S MASARIK, J REEDY, RC ELMORE, D LIPSCHUTZ, ME TI ALUMINUM-26, BE-10, AND CL-36 DEPTH PROFILES IN THE CANYON-DIABLO IRON METEORITE SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS LA English DT Article ID COSMOGENIC NUCLIDES; PRODUCTION-RATES; CROSS-SECTIONS; EXPOSURE AGES; AL-26; ARIZONA; CRATER; CORE AB We have measured activities of the long-lived cosmogenic radionuclides Al-26, Be-10, and Cl-36 in 12 fragments of the iron meteorite Canyon Diablo and have constructed production rate-versus-depth profiles of those radionuclides. Profiles determined using differential particle fluxes calculated with the LAHET code system are in good agreement with Al-26, Be-1O, and Cl-36 experimental data, but the agreement for Cl-36 was obtained only after neutron-induced cross sections were modified. Profiles calculated with lunar particle fluxes are much lower than experimental Canyon Diablo profiles. The cosmic ray exposure ages of most samples are near 540 m.y. C1 PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. LOS ALAMOS NATL LAB,ASTROPHYS & RADIAT MEASUREMENTS GRP,LOS ALAMOS,NM. RP MICHLOVICH, ES (reprint author), PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907, USA. NR 33 TC 21 Z9 21 U1 1 U2 2 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 NOV 25 PY 1994 VL 99 IS E11 BP 23187 EP 23194 DI 10.1029/94JE02267 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PU306 UT WOS:A1994PU30600004 ER PT J AU CHOQUETTE, KD SCHNEIDER, RP LEAR, KL GEIB, KM AF CHOQUETTE, KD SCHNEIDER, RP LEAR, KL GEIB, KM TI LOW-THRESHOLD VOLTAGE VERTICAL-CAVITY LASERS FABRICATED BY SELECTIVE OXIDATION SO ELECTRONICS LETTERS LA English DT Article DE VERTICAL CAVITY SURFACE EMITTING LASERS; OXIDATION AB Novel vertical-cavity surface emitting lasers fabricated using selective oxidation to form a current aperture under a top monolithic distributed Bragg reflector mirror are reported. Large cross-sectional area lasers (259 mu m(2)) exhibit threshold current densities of 150 A/cm(2) per quantum well and record low threshold voltage of 1.33V. Smaller lasers (36 mu m(2)) possess threshold currents of 900 mu A with maximum output powers greater than 1mW. The record performance of these oxidised vertical-cavity lasers arises from the low mirror series resistance and very efficient current injection into the active region. RP CHOQUETTE, KD (reprint author), SANDIA NATL LABS,DEPT PHOTON RES,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 6 TC 240 Z9 242 U1 2 U2 10 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 NOV 24 PY 1994 VL 30 IS 24 BP 2043 EP 2044 DI 10.1049/el:19941421 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PW393 UT WOS:A1994PW39300034 ER PT J AU PEURRUNG, AJ KOUZES, RT AF PEURRUNG, AJ KOUZES, RT TI STABLE CONFINEMENT IN AN AZIMUTHALLY ASYMMETRIC FTICR ION-TRAP SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article DE ADIABATIC INVARIANT; ASYMMETRIC PENNING TRAP; FOURIER TRANSFORM MASS SPECTROMETRY; MAGNETRON MOTION ID RESONANCE MASS-SPECTROMETRY; CYCLOTRON-RESONANCE; PENNING TRAP; COLLISIONS; TRANSPORT; ELECTRON; CATIONS; SHIFT AB Gravity, magnetic field gradients, and trap electric field errors all break the two-dimensional, azimuthal symmetry of an idealized ion trap. It has been suggested that these forces cause drifts which ultimately limit the trapping time of an ion cloud in a Fourier-transform ion-cyclotron-resonance mass spectrometry cell (F.H. Laukien, Int. J. Mass Spectrom. Ion Processes, 73 (1986) 81 (Ref. [1]).) In this paper we show that magnetron motion prevents ion loss. The breaking of this adiabatic invariant by time-dependent phenomena such as vibration and electrical noise is also analyzed. Under most conditions, the effect on the ion cloud is negligible. RP PEURRUNG, AJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 30 TC 3 Z9 3 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1176 J9 INT J MASS SPECTROM JI Int. J. Mass Spectom. Ion Process. PD NOV 24 PY 1994 VL 139 BP 39 EP 46 PG 8 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA PX639 UT WOS:A1994PX63900004 ER PT J AU HARRISON, JA FREI, H AF HARRISON, JA FREI, H TI VISIBLE LIGHT-INDUCED OXYGEN-TRANSFER FROM NITROGEN-DIOXIDE TO ETHYNE AND PROPYNE IN A CRYOGENIC MATRIX .1. IDENTIFICATION OF PRODUCTS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID WOLFF REARRANGEMENT; S-TRANS; KETENE; ARGON; PHOTOISOMERIZATION; CHEMISTRY; SPECTRUM; ACROLEIN; GLYOXAL; ALLENE AB Photochemical reaction of ethyne.NO2 and propyne.NO2 pairs isolated in solid Ar has been observed at wavelengths as long as 582 nm (HC=CH.NO2) and 615 nm(CH3C=CH.NO2). Continuous wave dye laser radiation was used to excite the reactants, and the chemistry was monitored by FT-infrared spectroscopy. In the case of ethyne + NO2, the sole products were CH2=C=O and NO. The reaction of NO2 with propyne gave methylketene plus a trapped intermediate, CH3C(=NO.)C(=O)H (formyl methyl iminoxy radical). Infrared spectra of this radical are reported for the first time. Product identification was based on D, O-18, and N-15 isotopic substitution. Selective interconversion with tuned visible laser light revealed the presence of four conformers, most probably originating from isomerism about the C-C and the C=N bonds. Photoelimination of NO from the iminoxy radical was observed at wavelengths as long as 625 nm. Propynol and methylketene could be identified among the secondary photolysis products. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CHEM BIODYNAM LAB,BERKELEY,CA 94720. NR 46 TC 16 Z9 16 U1 1 U2 14 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 NOV 24 PY 1994 VL 98 IS 47 BP 12142 EP 12151 DI 10.1021/j100098a006 PG 10 WC Chemistry, Physical SC Chemistry GA PT762 UT WOS:A1994PT76200006 ER PT J AU HARRISON, JA FREI, H AF HARRISON, JA FREI, H TI VISIBLE LIGHT-INDUCED OXYGEN-TRANSFER FROM NITROGEN-DIOXIDE TO ETHYNE AND PROPYNE IN A CRYOGENIC MATRIX .2. MECHANISM AND REGIOSELECTIVITY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID WOLFF REARRANGEMENT; ATOM TRANSFER; KETENE; OXIRENE; KETOCARBENES; INTERMEDIATE; ETHYLENE; PATHS; NO2 AB The kinetics of visible light-induced oxidation of ethyne and propyne by NO2 in solid Ar has been monitored as a function of photolysis wavelength. CW dye and Ar ion laser emission was used for irradiation, and FT-infrared spectroscopy for the measurement of product growth. Determination of the wavelength dependence of quantum efficiencies from the kinetic measurements revealed that the photolysis threshold of HC=CH + NO2 lies approximately 6 kcal mol(-1) higher than that of CH3C=CH + NO2. This and other parameters derived from the product growth measurements, and the formyl methyl iminoxy radical trapped in the case of the CH3C=CH + NO2 reaction are interpreted in terms of a direct O transfer mechanism. The proposed path involves large-amplitude O transfer from photoexcited NO2 to the C=C group to yield a transient ketocarbene. Formation of iminoxy radical is attributed to trapping of the ketocarbene by NO cage coproduct, which is in competition with Wolff rearrangement to yield ketene. From the structure of the iminoxy radical, it is inferred that the photoinduced O transfer from NO2 to the unsymmetrical C=C bond of propyne is completely regioselective, leading exclusively to the carbene transient with oxygen at the terminal carbon. This regiochemical outcome is interpreted in terms of potential energy profiles for central and terminal carbon attack of the triple bond. RP HARRISON, JA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CHEM BIODYNAM LAB,BERKELEY,CA 94720, USA. NR 27 TC 11 Z9 11 U1 1 U2 6 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 NOV 24 PY 1994 VL 98 IS 47 BP 12152 EP 12157 DI 10.1021/j100098a007 PG 6 WC Chemistry, Physical SC Chemistry GA PT762 UT WOS:A1994PT76200007 ER PT J AU KIEFER, JH SATHYANARAYANA, R LIM, KP MICHAEL, JV AF KIEFER, JH SATHYANARAYANA, R LIM, KP MICHAEL, JV TI THERMAL-DECOMPOSITION OF CF3CL SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID COLLISION RATE CONSTANTS; FALL-OFF RANGE; UNIMOLECULAR REACTIONS; ENERGY-TRANSFER; SHOCK-WAVES; PHOTOLYSIS; DISSOCIATION; PYROLYSIS; FLASH; TUBE AB The unimolecular decomposition CF3Cl + Kr --> CF3 + Cl + Kr has been studied using two different techniques, atomic resonance absorption spectrometry (ARAS) and laser schlieren (LS) density gradients, in two laboratories. As in our previous joint investigation of CCl4 dissociation, the ARAS and LS techniques give completely consistent results over the overlapping temperature range, 1800-2200 K. The title reaction is found to be fairly close to the low-pressure limit. The ARAS measurements between 1521 and 2173 K give k(2nd) = 1.73 x 10(-7) exp(-33837K/T) cm(3) molecule(-1) s(-1) (+/-27% at 1 sigma). This is in good agreement with the earlier ARAS measurements of Kruger and Wagner. k(2nd) = 1.15 x 10(-8) exp(-28330K/T) cm(3) molecule(-1) s(-1) (+/-20% at 1 sigma) is obtained from the LS results between 1800 and 3000 K. The good agreement between methods verifies both the C-Cl fission path for the CF3Cl dissociation and the curve-of-growth used in the Cl atom ARAS analysis. RRKM analysis of these rate data indicated a larger than usual magnitude for Delta E(down), in agreement with our previous findings on CCl4, but here it was necessary that it increase with T. The best fit was with -[Delta E](all) = 270 cm(-1). The RRKM fit to the data is given by the three-parameter expression k(2nd) = 2.95 x 10(24)T(-8.50) exp(-48133K/T) cm(3) molecule(-1) s(-1) for a pressure of 300 Torr. This final expression agrees with both the ARAS and LS results to within +/-25% and can be used in modeling applications between 1500 and 3000 K. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP KIEFER, JH (reprint author), UNIV ILLINOIS,DEPT CHEM ENGN,CHICAGO,IL 60680, USA. RI Michael, Joe/E-3907-2010 NR 31 TC 25 Z9 25 U1 1 U2 3 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 NOV 24 PY 1994 VL 98 IS 47 BP 12278 EP 12283 DI 10.1021/j100098a025 PG 6 WC Chemistry, Physical SC Chemistry GA PT762 UT WOS:A1994PT76200025 ER PT J AU MILONNI, PW AF MILONNI, PW TI INTERATOMIC SIGNALING IN QED SO NATURE LA English DT Letter RP MILONNI, PW (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 11 TC 0 Z9 0 U1 1 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD NOV 24 PY 1994 VL 372 IS 6504 BP 325 EP 326 DI 10.1038/372325b0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PU287 UT WOS:A1994PU28700037 ER PT J AU AHLUWALIA, DV AF AHLUWALIA, DV TI QUANTUM MEASUREMENT, GRAVITATION, AND LOCALITY SO PHYSICS LETTERS B LA English DT Article AB This essay argues that when measurement processes involve energies of the order of the Planck scale, the fundamental assumption of locality may no longer be a good approximation. Idealized position measurements of two distinguishable spin-0 particles are considered. The measurements alter the space-time metric in a fundamental manner governed by the commutation relations [x(i), p(j)] = ihBAR delta(ij) and the classical field equations of gravitation. This in-principle unavoidable change in the space-time metric destroys the commutativity (and hence locality) of position measurement operators. C1 LOS ALAMOS NATL LAB,PARTICLE PHYS RES GRP,LOS ALAMOS,NM 87545. RP AHLUWALIA, DV (reprint author), LOS ALAMOS NATL LAB,P-11,MS H-846,LOS ALAMOS,NM 87545, USA. NR 9 TC 126 Z9 126 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD NOV 24 PY 1994 VL 339 IS 4 BP 301 EP 303 DI 10.1016/0370-2693(94)90622-X PG 3 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PT649 UT WOS:A1994PT64900003 ER PT J AU COTTON, FA FALVELLO, LR MURILLO, CA PASCUAL, I SCHULTZ, AJ TOMAS, M AF COTTON, FA FALVELLO, LR MURILLO, CA PASCUAL, I SCHULTZ, AJ TOMAS, M TI NEUTRON AND X-RAY STRUCTURAL CHARACTERIZATION OF THE HEXAAQUAVANADIUM(II) COMPOUND VSO4.7H2O SO INORGANIC CHEMISTRY LA English DT Article ID VANADIUM(II) COMPOUNDS; CHARGE-DENSITIES; IONS; DIFFRACTION; CRYSTAL; SPIN AB The title compound, for which crystals are more reactive toward oxygen than the chemically similar compound VSO4.6H(2)O, has been prepared as large single crystals and characterized by both X-ray diffraction at room temperature and neutron diffraction at 11-16 K. VSO4.7H(2)O crystallizes in the monoclinic space group P2(1)/c, Z = 4, with the following cell dimensions, where in each case the room temperature X-ray value is given first followed by the 11-16 K neutron value: a = 14.130(3), 14.013(2) Angstrom; b = 6.501(1), 6.481(1) Angstrom; c = 11.017(2), 10.981(2) Angstrom; beta = 105.64(2), 105.39(1)degrees; V = 974.5(3), 961.5(3) Angstrom(3). The structure was refined to residuals of R = 0.0289 and 0.0766 and quality of fit = 1.047 and 1.427 for X-ray and neutron data, respectively. It consists of two independent centrosymmetric V(H2O)(6)(2+) ions connected to a sulfate ion and an interstitial water molecule by an extensive network of hydrogen bonds. The room temperature and low-temperature structures are qualitatively identical. Each hydrogen atom is involved in a hydrogen bond. The network of hydrogen bonds is implicated in the stability of VSO4.7H(2)O in the solid state in dry surroundings. C1 TEXAS A&M UNIV,MOLEC STRUCT & BONDING LAB,COLLEGE STN,TX 77843. UNIV COSTA RICA,DEPT CHEM,SAN JOSE,COSTA RICA. UNIV ZARAGOZA,CSIC,DEPT INORGAN CHEM,E-50009 ZARAGOZA,SPAIN. UNIV ZARAGOZA,CSIC,INST ARAGON MAT SCI,E-50009 ZARAGOZA,SPAIN. ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. RP COTTON, FA (reprint author), TEXAS A&M UNIV,DEPT CHEM,COLLEGE STN,TX 77843, USA. RI Tomas, Milagros/L-2503-2015; OI Tomas, Milagros/0000-0002-2811-606X; /0000-0002-0444-996X NR 22 TC 6 Z9 6 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD NOV 23 PY 1994 VL 33 IS 24 BP 5391 EP 5395 DI 10.1021/ic00102a009 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PU080 UT WOS:A1994PU08000009 ER PT J AU COTTON, FA DANIELS, LM FALVELLO, LR MURILLO, CA SCHULTZ, AJ AF COTTON, FA DANIELS, LM FALVELLO, LR MURILLO, CA SCHULTZ, AJ TI SOLID-SOLUTIONS OF A JAHN-TELLER COMPOUND IN AN UNDISTORTED HOST .4. NEUTRON AND X-RAY SINGLE-CRYSTAL STRUCTURES OF 2 CR/ZN TUTTON SALT SOLID-SOLUTIONS AND THE OBSERVATION OF DISORDER BY LOW-TEMPERATURE NEUTRON-DIFFRACTION SO INORGANIC CHEMISTRY LA English DT Article ID DISPLACEMENT PARAMETERS; DISTORTION; CHROMIUM; ZINC AB Solid solutions of the ammonium Cr/Zn Tutton salt with two different compositions, (NH4)2[Cr0.10Zn0.90(H2O)6](SO4)(2), 1, and (NH4)(2)[Cr0.22Zn0.78(H2O)(6)](SO4)(2), 2, have been studied by single-crystal X-ray diffraction at room temperature and by single crystal time-of-flight neutron diffraction at 11-16 K for 1 and at 11-17 K for 2. Composition was also characterized by atomic absorption, AA, analysis. The solid solutions crystallize in the monoclinic space group P2(1)/c, Z = 2, with the following cell dimensions, where in each case the room temperature X-ray value is given first followed by the low-temperature neutron value. For 1: a = 6.249(2), 6.286(1) Angstrom; b = 12.508(3), 12.367(2) Angstrom; c = 9.237(2), 9.147(2) Angstrom; beta = 106.82(2), 106.87(1)degrees; V = 691.1(3), 680.4(2) Angstrom(3). For 2: a = 6.252(1), 6.260(1) Angstrom; b = 12.503(1), 12.242(2) Angstrom; c = 9.247(1), 9.093(1) Angstrom; beta = 106.77(1), 106.89(2)degrees; V = 692.1(1), 666.8(2) Angstrom(3). The structure of 1 was refined to residuals of R = 0.0226 and 0.0670 and quality of fit = 1.099 and 1.165 for X-ray and neutron data, respectively; the corresponding residuals for the X-ray and neutron structures of 2 are R = 0.0215 and 0.0682, and quality-of-fit = 1.057 and 0.994. The anisotropic displacement parameters of the oxygen and hydrogen atoms from the neutron diffraction studies are examined for their implications as to the presence or absence of disorder in the ligands about the composite Cr/Zn metal center. The results for composition 2, x(Cr) = 0.22, clearly indicate the presence of disorder for the aqua ligand affected by Jahn-Teller distortion in the pure chromium complex. For composition 1, x(Cr) = 0.10, the observation of disorder is not clear. The structures of 1 and 2 are isotypic at a given temperature, but the room-temperature and low-temperature structures differ subtly in the hydrogen bonding pattern. C1 TEXAS A&M UNIV,MOLEC STRUCT & BONDING LAB,COLLEGE STN,TX 77843. UNIV COSTA RICA,DEPT CHEM,SAN JOSE,COSTA RICA. UNIV ZARAGOZA,CSIC,DEPT INORGAN CHEM,E-50009 ZARAGOZA,SPAIN. UNIV ZARAGOZA,CSIC,INST ARAGON MAT SCI,E-50009 ZARAGOZA,SPAIN. ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. RP COTTON, FA (reprint author), TEXAS A&M UNIV,DEPT CHEM,COLLEGE STN,TX 77843, USA. NR 18 TC 13 Z9 13 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 NOV 23 PY 1994 VL 33 IS 24 BP 5396 EP 5403 DI 10.1021/ic00102a010 PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PU080 UT WOS:A1994PU08000010 ER PT J AU MIEDANER, A CURTIS, CJ BARKLEY, RM DUBOIS, DL AF MIEDANER, A CURTIS, CJ BARKLEY, RM DUBOIS, DL TI ELECTROCHEMICAL REDUCTION OF CO2 CATALYZED BY SMALL ORGANOPHOSPHINE DENDRIMERS CONTAINING PALLADIUM SO INORGANIC CHEMISTRY LA English DT Article ID CASCADE MOLECULES; CARBON-DIOXIDE; TRANSITION; COMPLEXES; CHEMISTRY; DERIVATIVES; FERROCENE; TOPOLOGY; MICELLES; CATIONS AB The sequential addition of diethyl vinylphosphonate to primary phosphines followed by reduction with lithium aluminum hydride can be used to synthesize small dendrimers containing up to 15 phosphorus atoms. A second approach uses the addition of bis((diethylphosphino)ethyl)phosphine to tetravinylsilane to produce a dendrimer containing 12 phosphorus atoms. The connectivities of these ligands are established unambiguously by P-31 NMR spectroscopy. These dendrimers react with [Pd(CH3CN)(4)](BF4)(2) to produce metalated dendrimers which catalyze the electrochemical reduction of CO2 to CO. Relationships between catalytic properties and dendrimer structure are discussed. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 48 TC 174 Z9 176 U1 1 U2 27 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD NOV 23 PY 1994 VL 33 IS 24 BP 5482 EP 5490 DI 10.1021/ic00102a022 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PU080 UT WOS:A1994PU08000022 ER PT J AU VASSELL, KA ESPENSON, JH AF VASSELL, KA ESPENSON, JH TI OXIDATION OF ORGANIC SULFIDES BY ELECTROPHILICALLY-ACTIVATED HYDROGEN-PEROXIDE - THE CATALYTIC ABILITY OF METHYLRHENIUM TRIOXIDE SO INORGANIC CHEMISTRY LA English DT Article ID MAIN-GROUP ELEMENTS; TRANSITION-METALS; MULTIPLE BONDS; METHYLTRIOXORHENIUM; MOLYBDENUM; COMPLEXES; EPOXIDATION; DERIVATIVES; REAGENTS AB A family of organic sulfides was oxidized to the corresponding sulfoxides by hydrogen peroxide. Such reactions are, however, very slow and meaningless in practice without an effective catalyst. The oxidation was successfully catalyzed by CH3ReO3, a water-soluble organometallic oxide. A kinetic study was carried out in 1:1 (v/v) acetonitrile-water at pH 1 and at 25 degrees C. The kinetics can be resolved into two steps. First, H2O2 and CH3ReO3 react to form 1:1 and 2:1 rhenium peroxides, denoted as A and B, respectively. In the second step A and B react with the substrate forming the product. The rate constants for the various steps of these reactions were evaluated using steady-state techniques and are on the order of 10(3) L mol(-1) s(-1) for aryl methyl sulfides and 10(4) L mol(-1) s(-1) for dialkyl sulfides. Both A and B are reactive, A moreso than B. The kinetic results point to a mechanism that involves the nucleophilic attack of the sulfur atom on a peroxide oxygen of the rhenium peroxides. This formulation is consistent with the accelerating effects of electron-donating substituents. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. NR 27 TC 116 Z9 116 U1 1 U2 20 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD NOV 23 PY 1994 VL 33 IS 24 BP 5491 EP 5498 DI 10.1021/ic00102a023 PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PU080 UT WOS:A1994PU08000023 ER PT J AU RUSH, JD BIELSKI, BHJ AF RUSH, JD BIELSKI, BHJ TI DECAY OF FERRATE(V) IN NEUTRAL AND ACIDIC SOLUTIONS - A PREMIX PULSE-RADIOLYSIS STUDY SO INORGANIC CHEMISTRY LA English DT Article ID AQUEOUS-SOLUTIONS; FREE-RADICALS; REDUCTION; IRON AB Iron in the +5 oxidation state was generated by the reduction of aqueous potassium ferrate(VI), K2FeO4, using pulse radiolytically generated free radicals. The predominant mode of decay is first-order, in the pH range 3.6 to 7, with the rate constant decreasing from 7 x 10(4) s(-1) to about 100 s(-1). The instability of K2FeO4 under the conditions used required the use of the premix pulse radiolysis technique in which the pulse is delivered 100-200 ms after mixing of K2FeO4 solution with buffers. The rate law and the observation of small pH-dependent spectral shifts indicate that ferrate(V) exists in at least three protonated forms that, formulated as tetrahedral species, form the following equilibria: H3FeO4 half arrow right over half arrow left H2FeO4- + H+, 5.5 less than or equal to pK(1) less than or equal to 6.5; H2FeO4- half arrow right over half arrow left HFeO42- + H+, pK(2) approximate to 7.2; HFeO42- half arrow right over half arrow left FeO43- + H+, pK(3) = 10.1. The rate-limiting process in the first-order decay is the aquation of a tetrahedral ferrate(V) species into a species which is probably six-coordinate. The subsequent first order decay of the octahedral species is so fast that a second-order decay mode for H3FeO4 and H2FeO4- is not observed. The species present in alkaline solution, FeO43- and HFeO42-, aquate very slowly (less than or equal to 10 s(-1)) decay predominatly by a second-order process. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 22 TC 31 Z9 34 U1 3 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD NOV 23 PY 1994 VL 33 IS 24 BP 5499 EP 5502 DI 10.1021/ic00102a024 PG 4 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PU080 UT WOS:A1994PU08000024 ER PT J AU LEE, AL KANAAR, R RIO, DC WEMMER, DE AF LEE, AL KANAAR, R RIO, DC WEMMER, DE TI RESONANCE ASSIGNMENTS AND SOLUTION STRUCTURE OF THE 2ND RNA-BINDING DOMAIN OF SEX-LETHAL DETERMINED BY MULTIDIMENSIONAL HETERONUCLEAR MAGNETIC-RESONANCE SO BIOCHEMISTRY LA English DT Article ID SMALL NUCLEAR RIBONUCLEOPROTEIN; SIDE-CHAIN H-1; NMR-SPECTROSCOPY; DISTANCE GEOMETRY; C-13-ENRICHED PROTEINS; N-15-LABELED PROTEINS; DETERMINATION SIGNAL; COUPLING-CONSTANTS; SPLICE SITE; C-ALPHA AB The RNA-binding protein Sex-lethal (Sxl) is a critical regulator of sexual differentiation and dosage compensation in Drosophila. This regulatory activity is a consequence of the ability of Sxl to bind uridine-rich RNA tracts involved in pre-mRNA splicing. Sxl contains two RNP consensus-type RNA-binding domains (RBDs). A structural study of a portion of Sxl (amino acids 199-294) containing the second RNA-binding domain(RBD-2) using multidimensional heteronuclear NMR is presented here. Nearly complete H-1, C-13, and N-15 resonance assignments have been obtained from N-15- and C-13/N-15-uniformly labeled protein. These assignments were used to analyze 3D N-15-separated NOESY and C-13/C-13-separated 4D NOESY spectra which produced 494 total and 169 long-range NOE-derived distance restraints. Along with 41 backbone dihedral restraints; these distance restraints were employed to generate an intermediate-resolution family of calculated structures, which exhibits the beta alpha beta-beta alpha beta tertiary fold found in other RBD-containing proteins. The RMSD to the average structure for the backbone atoms of residues 11-93 is 1.55 +/- 0.30 Angstrom, while the RMSD for backbone atoms involved in secondary structure is 0.76 +/- 0.14 Angstrom. A capping box [Harper, E. T., and Rose, G. D. (1993) Biochemistry 32, 7605-7609] was identified at the N-terminus of the first helix and has been characterized by short- and medium-range NOEs. Finally, significant structural similarities and differences between Sxl RBD-2 and other RBD-containing proteins are discussed. C1 UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV STRUCT BIOL, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, DEPT MOLEC & CELL BIOL, BERKELEY, CA 94720 USA. FU NICHD NIH HHS [HD28063] NR 57 TC 67 Z9 67 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 22 PY 1994 VL 33 IS 46 BP 13775 EP 13786 DI 10.1021/bi00250a031 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PT485 UT WOS:A1994PT48500031 PM 7524663 ER PT J AU CHAMPION, KM COOK, RJ TOLLAKSEN, SL GIOMETTI, CS AF CHAMPION, KM COOK, RJ TOLLAKSEN, SL GIOMETTI, CS TI IDENTIFICATION OF A HERITABLE DEFICIENCY OF THE FOLATE-DEPENDENT ENZYME 10-FORMYLTETRAHYDROFOLATE DEHYDROGENASE IN MICE SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID RAT-LIVER; 2-DIMENSIONAL ANALYSIS; TISSUE PROTEINS; CELL FRACTIONS; ELECTROPHORESIS; PURIFICATION; RESOLUTION; MUTATIONS; HYDROLASE; SERUM AB During the analysis of liver protein expression in the offspring of male mice irradiated with fission spectrum neutrons, one offspring displayed a heritable 50% decrease in the abundance of two proteins. Homozygous mice lacking detectable quantities of these proteins were obtained through breeding. Characterization of this protein deficiency has identified these liver proteins as forms of the enzyme 10-formyltetrahydrofolate dehydrogenase (10-formyl-THF DH; 10-formyltetrahydrofolate:NADP(+) oxidoreductase, EC 1.5.1.6). NH2-terminal sequence analysis demonstrated that both proteins share identical sequences in the first 25 residues, and this sequence matches (96% identity) that of rat and human 10-formyl-THF DH. In addition, these proteins showed cross-reactivity to polyclonal antiserum raised against purified rat 10-formyl-THF DH. Southern (DNA) blot analysis revealed a restriction fragment length polymorphism consistent with a deletion mutation in the 10-formyl-THF DH structural gene in homozygous mice. Results of Northern (RNA) blot analysis demonstrated the absence of 10-formyl-THF DH mRNA in mice lacking 10-formyl-THF DH protein. Furthermore, liver cytosolic 10-formyl-THF DH enzymatic activity was undetectable in homozygotes. Measurement of hepatic folate pools showed that in homozygotes the total folate pool is decreased and the level of tetrahydrofolate is markedly depleted. C1 ARGONNE NATL LAB,CTR MECH BIOL & BIOTECHNOL,ARGONNE,IL 60439. VANDERBILT UNIV,SCH MED,DEPT BIOCHEM,NASHVILLE,TN 37232. FU NIDDK NIH HHS [DK15289] NR 26 TC 48 Z9 48 U1 0 U2 0 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 NOV 22 PY 1994 VL 91 IS 24 BP 11338 EP 11342 DI 10.1073/pnas.91.24.11338 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PU285 UT WOS:A1994PU28500012 PM 7972060 ER PT J AU KANG, CH BERGER, I LOCKSHIN, C RATLIFF, R MOYZIS, R RICH, A AF KANG, CH BERGER, I LOCKSHIN, C RATLIFF, R MOYZIS, R RICH, A TI CRYSTAL-STRUCTURE OF INTERCALATED 4-STRANDED D(C3T) AT 1.4 ANGSTROM RESOLUTION SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE C-CENTER-DOT-C+ BASE PAIRS; HYDRATION; TELOMERES; BASE-STACKING; PARALLEL-STRANDED DUPLEX ID MOLECULAR-STRUCTURE; ATOMIC RESOLUTION; ACID AB The crystal structure of d(C3T), solved at 1.4 Angstrom resolution, reveals that the molecule forms a four-stranded intercalated complex. It consists of two parallel-stranded duplexes, each of which is held together by cytosine-protonated cytosine base pairs. The two duplexes are intercalated with each other and have opposite strand orientation. The molecule has a flat, lath like appearance, and the covalently bonded cytosines have a slow right-handed twist of 17.1 degrees. However, there is considerable asymmetry. On one of the flat sides, the phosphate groups are rotated away from the center of the molecule. They are held in this orientation by bridging water molecules that bind the NH of cytosine and a phosphate group of an opposite chain. There is also considerable microheterogeneity in the structure. The cytosine hemiprotonation occurs even at pH 7 where stable crystals form. C1 HANNOVER MED SCH,DEPT BIOPHYS CHEM,D-30623 HANNOVER,GERMANY. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. RP KANG, CH (reprint author), MIT,DEPT BIOL,77 MASSACHUSETTS AVE,CAMBRIDGE,MA 02139, USA. NR 13 TC 120 Z9 120 U1 0 U2 5 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 NOV 22 PY 1994 VL 91 IS 24 BP 11636 EP 11640 DI 10.1073/pnas.91.24.11636 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PU285 UT WOS:A1994PU28500072 PM 7972115 ER PT J AU CONDE, ME KWON, SI YOUNG, AT LEUNG, KN KIM, KJ AF CONDE, ME KWON, SI YOUNG, AT LEUNG, KN KIM, KJ TI PHOTOEMISSION-STUDIES WITH BARIUM AND LAB6 PHOTOCATHODES AND POLARIZED LASER-LIGHT SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRON C1 KYONGGI UNIV,DEPT PHYS,SUWON,SOUTH KOREA. RP CONDE, ME (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 14 TC 1 Z9 1 U1 0 U2 1 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 NOV 21 PY 1994 VL 65 IS 21 BP 2660 EP 2662 DI 10.1063/1.112993 PG 3 WC Physics, Applied SC Physics GA PT872 UT WOS:A1994PT87200012 ER PT J AU GORBATKIN, SM RHOADES, RL TSUI, TY OLIVER, WC AF GORBATKIN, SM RHOADES, RL TSUI, TY OLIVER, WC TI HARD BORON-OXIDE THIN-FILM DEPOSITION USING ELECTRON-CYCLOTRON-RESONANCE MICROWAVE PLASMAS SO APPLIED PHYSICS LETTERS LA English DT Article ID INDENTATION; BEHAVIOR; DIAMOND RP GORBATKIN, SM (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 22 TC 24 Z9 25 U1 1 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 NOV 21 PY 1994 VL 65 IS 21 BP 2672 EP 2674 DI 10.1063/1.112598 PG 3 WC Physics, Applied SC Physics GA PT872 UT WOS:A1994PT87200016 ER PT J AU SOFO, JO MAHAN, GD AF SOFO, JO MAHAN, GD TI THERMOELECTRIC FIGURE OF MERIT OF SUPERLATTICES SO APPLIED PHYSICS LETTERS LA English DT Article C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. RP SOFO, JO (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Sofo, Jorge/J-4415-2012; Sofo, Jorge/B-4344-2014 OI Sofo, Jorge/0000-0003-4513-3694; Sofo, Jorge/0000-0003-4513-3694 NR 13 TC 114 Z9 116 U1 0 U2 19 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 NOV 21 PY 1994 VL 65 IS 21 BP 2690 EP 2692 DI 10.1063/1.112607 PG 3 WC Physics, Applied SC Physics GA PT872 UT WOS:A1994PT87200022 ER PT J AU TIWARI, P WU, XD FOLTYN, SR JIA, QX CAMPBELL, IH ARENDT, PA MUENCHAUSEN, RE PETERSON, DE MITCHELL, TE NARAYAN, J AF TIWARI, P WU, XD FOLTYN, SR JIA, QX CAMPBELL, IH ARENDT, PA MUENCHAUSEN, RE PETERSON, DE MITCHELL, TE NARAYAN, J TI SYNTHESIS OF EPITAXIAL PT ON (100)SI USING TIN BUFFER LAYER BY PULSED-LASER DEPOSITION SO APPLIED PHYSICS LETTERS LA English DT Article ID SUPERCONDUCTING THIN-FILMS; VAPOR-DEPOSITION; YBA2CU3O7-DELTA; GROWTH; OXIDATION; AL; SI C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695. RP TIWARI, P (reprint author), LOS ALAMOS NATL LAB,CTR SUPERCOND TECHNOL,POB 1663,LOS ALAMOS,NM 87545, USA. RI Narayan, Jagdish/D-1874-2009; Jia, Q. X./C-5194-2008 NR 16 TC 11 Z9 13 U1 0 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 NOV 21 PY 1994 VL 65 IS 21 BP 2693 EP 2695 DI 10.1063/1.112608 PG 3 WC Physics, Applied SC Physics GA PT872 UT WOS:A1994PT87200023 ER PT J AU MOCAK, J FELDBERG, SW AF MOCAK, J FELDBERG, SW TI THE RICHTMYER MODIFICATION OF THE FULLY IMPLICIT FINITE-DIFFERENCE ALGORITHM FOR SIMULATIONS OF ELECTROCHEMICAL PROBLEMS SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article ID DIGITAL-SIMULATION AB The five-level Richtmyer modification of the fully implicit Laasonen finite difference algorithm is shown to exhibit superb accuracy and rapid convergence for the simulation of electrochemical phenomena, supporting the very wide range of values of the dimensionaless diffusion parameter D* (D* = DDELTAt/DELTAx2) from 10 to 10(20). Large values of D* are essential for accurate and efficient simulations of systems involving a wide dynamic range of homogeneous kinetic rates. The performance is tested by simulations of Cottrellian diffusion and executed using a minor modification of Rudolph's fast implicit finite difference algorithm. The accuracy of the simulations is verified by comparing simulated values of time-dependent fluxes and flux integrals and time- and distance-dependent concentrations, with values computed from known analytic solutions. C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. RP MOCAK, J (reprint author), SLOVAK UNIV TECHNOL BRATISLAVA, DEPT ANALYT CHEM, RADLINSKEHO 9, CS-81237 BRATISLAVA, SLOVAKIA. NR 15 TC 73 Z9 73 U1 1 U2 1 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 1572-6657 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD NOV 21 PY 1994 VL 378 IS 1-2 BP 31 EP 37 DI 10.1016/0022-0728(94)87054-3 PG 7 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA PP524 UT WOS:A1994PP52400003 ER PT J AU MCGOWAN, FK JOHNSON, NR RAO, MN BAKTASH, C LEE, IY WELLS, JC KORTELAHTI, M JANZEN, VP AF MCGOWAN, FK JOHNSON, NR RAO, MN BAKTASH, C LEE, IY WELLS, JC KORTELAHTI, M JANZEN, VP TI TRANSITION QUADRUPOLE-MOMENTS OF HIGH-SPIN STATES IN W-170 SO NUCLEAR PHYSICS A LA English DT Article DE SN-122(CR-52, 4N)W-170; E=230 MEV; MEASURED GAMMA-SPECTRA; MEASURED LIFETIMES OF STATES BY DOPPLER-SHIFT RECOIL-DISTANCE AND DBLS METHODS; W-170 DEDUCED Q(T) VALUE IN YRAST AND NEGATIVE-PARITY BANDS; B(E1); W-170; CRANKED-HFB CALCULATIONS; DEFORMATION PARAMETERS BETA(2),BETA(4),GAMMA ID COLLECTIVITY; NUCLEI; YRAST; YB-160; LINE AB Lifetimes of states in W-170 have been measured by the Doppler-shift recoil-distance and Doppler-broadened line-shape (DBLS) methods using the reaction Sn-122(Cr-52, 4n)W-170 at a bombarding energy of 230 MeV. The data were collected in the gamma gamma-coincidence mode in order to reduce the complexities of the gamma-ray spectra and to avoid some of the problems associated with side-feeding to excited states. The experimental transition quadrupole moments, Q(t), cluster around a value of 6 e.b up through spin of I = 24 h. This is the trend predicted by cranked Hartree-Fock-Bogoliubov (HFB) calculations and by the calculated systematics of triaxial-shape-driving forces which originate from the aligned i(13/2) neutron orbitals around N = 96. The interaction strength \V\ between the g- and the s-band extracted from the data is 60 +/- 5 keV. The Q(t) values of several states in the negative-parity band (-, 1) also duster around a value of 6 e.b. The El transition probabilities for the decay of states in the (pi, alpha) = (-, 1) band to states in the ground-state band range between 10(-5) to 3.5 x 10(-4) W.u.. The B(E1, I --> I + 1) is one order of magnitude larger than the B(E1, I --> I - 1). The origin of these effects can probably be understood in terms of a predominant admixture of Coriolis-coupled octupole vibrational-state wave functions in the(-, 1) band of W-170 at low spin. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. TENNESSEE TECHNOL UNIV,COOKEVILLE,TN 38505. LOUISIANA STATE UNIV,BATON ROUGE,LA 70803. UNIV TENNESSEE,KNOXVILLE,TN 37916. NR 32 TC 6 Z9 6 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD NOV 21 PY 1994 VL 580 IS 2 BP 335 EP 348 DI 10.1016/0375-9474(94)90778-1 PG 14 WC Physics, Nuclear SC Physics GA PT181 UT WOS:A1994PT18100010 ER PT J AU ANLAUF, H AF ANLAUF, H TI ON THE QCD CORRECTIONS TO B-]S-GAMMA IN SUPERSYMMETRIC MODELS SO NUCLEAR PHYSICS B LA English DT Article ID EFFECTIVE FIELD-THEORY; BBAR-MESON DECAY; B->S-GAMMA DECAY; B->S PROCESSES; SUPERGRAVITY; ENHANCEMENT; CONSTRAINTS; PHYSICS AB We reinvestigate the leading QCD corrections to the radiative decay b --> sy for supersymmetric extensions of the Standard Model, Although the major contributions to the corrections originate from the running of the effective Lagrangian from the W scale down to the b scale, additional corrections are expected from large mass splittings between the particles running in the loops, as well as from integrating out heavy particles at scales different from the W mass. The calculation is performed in the framework of effective field theories. RP ANLAUF, H (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 49 TC 31 Z9 31 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV 21 PY 1994 VL 430 IS 2 BP 245 EP 277 DI 10.1016/0550-3213(94)00417-X PG 33 WC Physics, Particles & Fields SC Physics GA PU757 UT WOS:A1994PU75700002 ER PT J AU LEBED, RF AF LEBED, RF TI BARYON DECUPLET MASS RELATIONS IN CHIRAL PERTURBATION-THEORY SO NUCLEAR PHYSICS B LA English DT Article ID EFFECTIVE FIELD-THEORY; HEAVY MESONS; DECAYS; QUARK; LAGRANGIANS; SYMMETRY; OCTET AB Baryon decuplet masses within an SU(3)(L) x SU(3)(R) chiral Lagrangian formalism are found to satisfy four relations at second order in flavor breaking. As a result, the one-loop corrections from Lagrangian terms up to first order in flavor breaking are observed to give finite and calculable corrections to these relations. The importance of group theory in establishing the relations and eliminating many loop corrections is emphasized. The formal expressions for these corrections are presented, followed by numerical evaluations. We find consistency between the experimental values of breaking of the relations and the loop corrections of these relations as predicted by chiral perturbation theory. RP LEBED, RF (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720, USA. NR 32 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV 21 PY 1994 VL 430 IS 2 BP 295 EP 318 DI 10.1016/0550-3213(94)00375-0 PG 24 WC Physics, Particles & Fields SC Physics GA PU757 UT WOS:A1994PU75700004 ER PT J AU BEHRNDT, K FORSTE, S AF BEHRNDT, K FORSTE, S TI STRING KALUZA-KLEIN COSMOLOGY SO NUCLEAR PHYSICS B LA English DT Article ID NONLINEAR SIGMA-MODELS; BLACK-HOLES; EXPANDING UNIVERSE; BACKGROUNDS; TORSION; DUALITY AB We generalize a five-dimensional black hole solution of low energy effective string theory to arbitrary constant spatial curvature. After interchanging the signature of time and radius we reduce the five-dimensional solution to four dimensions and obtain that way a four-dimensional isotropic cosmological space time. The solution contains a dilaton, modulus field and torsion. Several features of the solution are discussed. C1 HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP BEHRNDT, K (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 36 TC 66 Z9 66 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV 21 PY 1994 VL 430 IS 2 BP 441 EP 459 DI 10.1016/0550-3213(94)00364-5 PG 19 WC Physics, Particles & Fields SC Physics GA PU757 UT WOS:A1994PU75700009 ER PT J AU JIN, C HETTICH, RL COMPTON, RN TUINMAN, A DERECSKEIKOVACS, A MARYNICK, DS DUNLAP, BI AF JIN, C HETTICH, RL COMPTON, RN TUINMAN, A DERECSKEIKOVACS, A MARYNICK, DS DUNLAP, BI TI ATTACHMENT OF 2 ELECTRONS TO C60F48 - COULOMB BARRIERS IN DOUBLY-CHARGED ANIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIATOMIC DIFFERENTIAL-OVERLAP; PARTIAL RETENTION; MOLECULES; APPROXIMATIONS; IONS; POLARIZABILITIES; IONIZATION; EXCHANGE; ATOMS C1 UNIV TENNESSEE, DEPT CHEM, KNOXVILLE, TN 37996 USA. UNIV TEXAS, DEPT CHEM, ARLINGTON, TX 76019 USA. USN, RES LAB, WASHINGTON, DC 20375 USA. RP JIN, C (reprint author), OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RI Hettich, Robert/N-1458-2016; OI Hettich, Robert/0000-0001-7708-786X; Dunlap, Brett/0000-0003-1356-6559 NR 28 TC 100 Z9 100 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 21 PY 1994 VL 73 IS 21 BP 2821 EP 2824 DI 10.1103/PhysRevLett.73.2821 PG 4 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600009 ER PT J AU CAUSSYN, DD DERBENEV, YS ELLISON, TJP LEE, SY RINCKEL, T SCHWANDT, P SPERISEN, F STEPHENSON, EJ VONPRZEWOSKI, B BLINOV, BB CHU, CM COURANT, ED CRANDELL, DA KAUFMAN, WA KRISCH, AD NURUSHEV, TS PHELPS, RA RATNER, LG WONG, VK OHMORI, C AF CAUSSYN, DD DERBENEV, YS ELLISON, TJP LEE, SY RINCKEL, T SCHWANDT, P SPERISEN, F STEPHENSON, EJ VONPRZEWOSKI, B BLINOV, BB CHU, CM COURANT, ED CRANDELL, DA KAUFMAN, WA KRISCH, AD NURUSHEV, TS PHELPS, RA RATNER, LG WONG, VK OHMORI, C TI SPIN FLIPPING A STORED POLARIZED PROTON-BEAM SO PHYSICAL REVIEW LETTERS LA English DT Article ID SIBERIAN SNAKE; DEPOLARIZING RESONANCES; ACCELERATION C1 UNIV MICHIGAN,DEPT NUCL ENGN,ANN ARBOR,MI 48109. MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV MICHIGAN,OFF PROVOST,FLINT,MI 48503. INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47408. UNIV MICHIGAN,RANDALL LAB PHYS,ANN ARBOR,MI 48109. UNIV TOKYO,INST NUCL STUDY,TANASHI,TOKYO 188,JAPAN. NR 23 TC 36 Z9 36 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 NOV 21 PY 1994 VL 73 IS 21 BP 2857 EP 2859 DI 10.1103/PhysRevLett.73.2857 PG 3 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600018 ER PT J AU VISNJIC, V AF VISNJIC, V TI LOCAL DISPERSION INSERT - A NOVEL FOCUSING ELEMENT FOR ACCELERATORS SO PHYSICAL REVIEW LETTERS LA English DT Article RP VISNJIC, V (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 21 PY 1994 VL 73 IS 21 BP 2860 EP 2862 DI 10.1103/PhysRevLett.73.2860 PG 3 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600019 ER PT J AU PORTER, JD ZINNWARNER, AS AF PORTER, JD ZINNWARNER, AS TI YOUNG MODULUS OF 2-DIMENSIONAL ICE FROM THE ELECTROSTATIC COMPRESSION OF MERCURY/WATER/MERCURY TUNNEL-JUNCTIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID WATER; SURFACE C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP PORTER, JD (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 24 TC 20 Z9 20 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 NOV 21 PY 1994 VL 73 IS 21 BP 2879 EP 2882 DI 10.1103/PhysRevLett.73.2879 PG 4 WC Physics, Multidisciplinary SC Physics GA PT726 UT WOS:A1994PT72600024 ER PT J AU DYKMAN, MI MILLONAS, MM SMELYANSKIY, VN AF DYKMAN, MI MILLONAS, MM SMELYANSKIY, VN TI OBSERVABLE AND HIDDEN SINGULAR FEATURES OF LARGE FLUCTUATIONS IN NONEQUILIBRIUM SYSTEMS SO PHYSICS LETTERS A LA English DT Article ID NONDIFFERENTIABLE POTENTIALS; DYNAMICAL-SYSTEMS; METASTABLE STATE; NOISE; LIFETIME AB We study local features, and provide a topological insight into the global structure of the probability density distribution and of the pattern of the optimal paths for large rare fluctuations away from a stable state. In contrast to extremal paths in quantum mechanics, the optimal paths do not encounter caustics. We show how this occurs, and what, instead of caustics, are the experimentally observable singularities of the pattern. We reveal the possibility for a caustic and a switching line to start at a saddle point, and discuss the consequences. C1 MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48104. NR 26 TC 80 Z9 80 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 NOV 21 PY 1994 VL 195 IS 1 BP 53 EP 58 DI 10.1016/0375-9601(94)90426-X PG 6 WC Physics, Multidisciplinary SC Physics GA PR801 UT WOS:A1994PR80100010 ER PT J AU TSANG, T AF TSANG, T TI REFLECTED OPTICAL HARMONICS FROM DIELECTRIC MIRRORS SO APPLIED OPTICS LA English DT Article DE NONLINEAR OPTICS; FEMTOSECOND PULSES; LASER BEAM OPTICS; OPTICAL LENS; MIRROR SYSTEMS ID FEMTOSECOND PULSES; GENERATION; AMPLIFIER AB Optical second and third harmonics were generated in reflection from commercially available laser dielectric mirrors. Although most dielectric coatings on laser mirrors are centrosymmetric, the inversion symmetry is broken at the dielectric-air interface. When intense femtosecond laser pulses are reflected off the dielectric mirrors, a second-order dipole contribution to surface second-harmonic generation can exist and is detected. More dramatically, at a laser fluence of similar to 10 GW/cm(2) the normally much weaker electric-dipole-allowed third-harmonic generation that originated in the bulk accentuates the second-harmonic generation. These reflected harmonics are, in some cases, nonnegligible in many sensitive experiments. RP TSANG, T (reprint author), BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. NR 13 TC 6 Z9 6 U1 0 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD NOV 20 PY 1994 VL 33 IS 33 BP 7720 EP 7724 PG 5 WC Optics SC Optics GA PW744 UT WOS:A1994PW74400005 PM 20962981 ER PT J AU KOENIGSBERGER, G MOFFAT, AFJ STLOUIS, N AUER, LH DRISSEN, L SEGGEWISS, W AF KOENIGSBERGER, G MOFFAT, AFJ STLOUIS, N AUER, LH DRISSEN, L SEGGEWISS, W TI REMARKABLE LONG-TERM CHANGES IN THE SMALL MAGELLANIC CLOUD WOLF-RAYET SYSTEM HD-5980 SO ASTROPHYSICAL JOURNAL LA English DT Article DE MAGELLANIC CLOUDS; STARS, INDIVIDUAL (HD 5980); STARS, WOLF-RAYET ID ECLIPSING BINARY HD-5980; PHOTOMETRIC VARIABILITY; STARS; SMC AB In this paper we report the remarkable changes which occurred in the Small Magellanic Cloud W-R system HD5980 = AB5 between 1978 and 1991. Within this timescale, there has been a systematic enhancement (by factors of 2-10 depending on the line) in the equivalent widths of all emission lines, and a change in the relative strengths of N III, N IV, and N V lines. Currently, the W-R spectrum is more typical of a WN6 star than a WN3 or WN4, as it was originally classified. The terminal speed of the wind has diminished by similar to 600 km s(-1), while the system has brightened in the visual by 0.45 mag. The UV (1850 Angstrom) continuum changed by less than 0.13 mag. The change from WN3 or WN4 to WN6 is unprecedented. The system appears to be composed of at least three stars: two WNs in mutual 19.266 day orbit and an O-type supergiant. We propose that the changes observed in HD 5980 are related to an increase in wind density of one (or both?) of the W-R components, where the brighter WN6 component will dominate the W-R spectrum after the change, and we speculate that this modification of the wind structure is driven by tidal interaction induced by a possible current periastron passage of the third component in the system. C1 UNIV MONTREAL,DEPT PHYS,MONTREAL H3C 3J7,PQ,CANADA. OBSERV ASTRON MT MEGANTIC,MONTREAL,PQ,CANADA. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218. UNIV BONN,OBSERV HOHER LIST,W-5568 DAUN,GERMANY. RP KOENIGSBERGER, G (reprint author), NATL AUTONOMOUS UNIV MEXICO,INST ASTRON,APARTADO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 38 TC 27 Z9 27 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 NOV 20 PY 1994 VL 436 IS 1 BP 301 EP 311 DI 10.1086/174905 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PR932 UT WOS:A1994PR93200032 ER PT J AU MAK, JE BRENNINKMEIJER, CAM TAMARESIS, J AF MAK, JE BRENNINKMEIJER, CAM TAMARESIS, J TI ATMOSPHERIC (CO)-C-14 OBSERVATIONS AND THEIR USE FOR ESTIMATING CARBON-MONOXIDE REMOVAL RATES SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID OH; TEMPERATURE; ABUNDANCE; TRENDS; OZONE AB Atmospheric (CO)-C-14 can be used as a tracer of the global tropospheric hydroxyl radical (OH) concentration, Which is responsible for the destruction of many trace gas species. (CO)-C-14 is produced throughout the Earth's atmosphere by a N-14 neutron capture reaction followed by hot atom oxidation. It subsequently follows the pathway of any other CO molecule and is thus removed from the atmosphere by OH oxidation. From the isotopic information it is also possible to elucidate the histories of CO from otherwise identical air masses. Results from global sampling campaigns are presented which establish the northern hemisphere (NH) latitudinal dependence and seasonal extremes of this trace constituent. We used the Lawrence Livermore National Laboratory two-dimensional chemistry/transport model to predict (CO)-C-14 temporal and spatial distributions, keeping in mind the importance of reasonable simulations for validating the accuracy of atmospheric models in general. The measured (CO)-C-14 latitudinal gradient in the NH is consistent with results from previous campaigns in the southern hemisphere, which reveal lower values than predicted; vertical gradients within the troposphere are similarly exaggerated in model simulations. Differences between model output and observations, which are of the order of 25% and the likely sources of error are discussed. We also examine the difference in (CO)-C-14 between the hemispheres and estimate this to be between 15 and 25%, with higher levels in the NH. C1 NATL INST WATER & ATMOSPHER RES, CROWN RES INST, LOWER HUTT, NEW ZEALAND. LAWRENCE LIVERMORE NATL LAB, CTR ACCELERATOR MASS SPECTROMETRY, DIV GLOBAL CLIMATE RES, LIVERMORE, CA 94550 USA. RI Brenninkmeijer, Carl/B-6860-2013 NR 26 TC 34 Z9 35 U1 0 U2 0 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 NOV 20 PY 1994 VL 99 IS D11 BP 22915 EP 22922 DI 10.1029/94JD01931 PG 8 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT032 UT WOS:A1994PT03200013 ER PT J AU COOPER, DI EICHINGER, WE AF COOPER, DI EICHINGER, WE TI STRUCTURE OF THE ATMOSPHERE IN AN URBAN PLANETARY BOUNDARY-LAYER FROM LIDAR AND RADIOSONDE OBSERVATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID ENTRAINMENT ZONE; AIRCRAFT AB The planetary boundary layer (PBL) over Mexico City was probed with a scanning backscatter lidar to characterize and evaluate the multidimensional structure of the atmosphere. Comparisons were made between radiosonde and lidar-derived PBL heights which showed the two techniques to be in close agreement. The spatial properties of the free atmosphere-PBL interface were found to be approximately the same size as the entrainment zone thickness. Below the interface the lidar observed spatially resolved structures, such as thermal plumes, convective eddies, low-level jets, and entrainment into the PBL. These structures were spatially correlated with the local diabatic condition and wind stress. One highly unstable atmosphere contains a lidar-visualized convective structure rising to a height of 0.45 the inversion base, which was predicted from earlier turbulence models. Other features, such as low-level jets, were found to be associated with neutral atmospheres in the mixing layer. The analysis indicates that the transport of pollutants is not a continuous and gradient-driven process, but low frequency and spatially discontinuous. The high spatial and temporal resolution afforded by the scanning lidar depicts surface-atmosphere interactions which are neither spatially homogeneous nor horizontally uniform. RP COOPER, DI (reprint author), LOS ALAMOS NATL LAB, MAIL STOP D436, LOS ALAMOS, NM 87545 USA. NR 20 TC 37 Z9 38 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 NOV 20 PY 1994 VL 99 IS D11 BP 22937 EP 22948 DI 10.1029/94JD01944 PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT032 UT WOS:A1994PT03200015 ER PT J AU ASELAGE, TL AF ASELAGE, TL TI OCCURRENCE OF FREE CUO IN YBA2CU3O6+DELTA AND ITS EFFECT ON MELTING AND SOLIDIFICATION SO PHYSICA C LA English DT Article ID SINGLE-CRYSTAL GROWTH; YBA2CU3O7-DELTA SUPERCONDUCTOR; Y2O3-BAO-CUO LIQUIDUS; TEMPERATURE; KINETICS; MICROSTRUCTURE; MORPHOLOGY; CHEMISTRY; Y2BACUO5; OXIDES AB An endothermic reaction is frequently observed in samples of YBa2Cu3O6+delta (123) at temperatures of about 940 degrees C in air or 965 degrees C in O-2. The origin of this endotherm was examined by differential thermal analysis, microstructural analysis, and by a critical review of the pertinent literature. It is concluded that this endothermic reaction is caused by the presence of free CuO in 123 samples. Potential sources of free CuO in 123 are considered, and the effect of free CuO on the melting and solidification of 123 is discussed. RP ASELAGE, TL (reprint author), SANDIA NATL LABS,DEPT 1153,ALBUQUERQUE,NM 87185, USA. NR 38 TC 26 Z9 26 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 20 PY 1994 VL 233 IS 3-4 BP 292 EP 300 DI 10.1016/0921-4534(94)90755-2 PG 9 WC Physics, Applied SC Physics GA PT740 UT WOS:A1994PT74000009 ER PT J AU NEUMEIER, JJ AF NEUMEIER, JJ TI ANALYSIS OF THE SUPERCONDUCTING TRANSITION-TEMPERATURES PRESSURE-DEPENDENCE FOR YBA2CU3O7-DELTA WITHIN A BCS FRAMEWORK SO PHYSICA C LA English DT Article ID HIGH-TC SUPERCONDUCTORS; VANHOVE SINGULARITY; CHARGE-TRANSFER; SINGLE-CRYSTAL; GPA; STRESS AB The pressure dependence of the superconducting transition temperature dT(c)/dP of the YBa2Cu3O7 high-T-c superconductor is addressed. A value of dln T-c/dln V (where V is the volume) comparable to the phonon Gruneisen parameter is revealed, thereby allowing for reasonable analysis using the Allen-Dynes equation for T-c. The electronic contribution to the electron-phonon coupling parameter eta is found to be positively influenced by pressure, with a volume dependence of dln eta/dln V approximate to -3, and to offset the Gruneisen parameter's contribution in the equation for dln T-c/dln V by about a factor of 1.5 thus resulting in a positive pressure dependence of T-c. This value is comparable to that observed in conventional superconductors. The possible influence of a van Hove singularity near the Fermi energy on T-c(P) results is discussed. RP NEUMEIER, JJ (reprint author), LOS ALAMOS NATL LAB,GRP MST10,MAIL STOM K764,POB 1663,LOS ALAMOS,NM 87545, USA. NR 32 TC 15 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 20 PY 1994 VL 233 IS 3-4 BP 354 EP 360 DI 10.1016/0921-4534(94)90762-5 PG 7 WC Physics, Applied SC Physics GA PT740 UT WOS:A1994PT74000016 ER PT J AU SCHLUETER, JA CARLSON, KD GEISER, U WANG, HH WILLIAMS, JM KWOK, WK FENDRICH, JA WELP, U KEANE, PM DUDEK, JD KOMOSA, AS NAUMANN, D ROY, T SCHIRBER, JE BAYLESS, WR DODRILL, B AF SCHLUETER, JA CARLSON, KD GEISER, U WANG, HH WILLIAMS, JM KWOK, WK FENDRICH, JA WELP, U KEANE, PM DUDEK, JD KOMOSA, AS NAUMANN, D ROY, T SCHIRBER, JE BAYLESS, WR DODRILL, B TI SUPERCONDUCTIVITY UP TO 11.1-K IN 3 SOLVATED SALTS COMPOSED OF [AG(CF3)(4)](-) AND THE ORGANIC ELECTRON-DONOR MOLECULE BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE (ET) SO PHYSICA C LA English DT Article ID AMBIENT PRESSURE; TC; KAPPA-(BEDT-TTF)2CU(NCS)2; K-(BEDT-TTF)2CUBR; TRANSITION; RESISTANCE AB Electrocrystallization of the electron-donor molecule BEDT-TTF [bis(ethylenedithio)tetrathiafulvalene] with the square planar organometallic anion [Ag(CF3)(4)](-) in TCE (1,1,2-trichloroethane) results in the formation of at least four crystalline phases. A plate-like phase, kappa(L)-(ET)(2)Ag(CF3)(4).TCE, is isostructural to kappa(L)-(ET)(2)Cu(CF3)(4).TCE (T-c=4.0 K) with a slightly expanded unit cell, but a lower critical temperature of 2.6 K. Two superconducting needle phases of (ET)(2)Ag(CF3)(4).TCE have been observed, with critical temperatures of 9.4 and 11.1 K. The critical temperature of this latter phase is within 0.5 K of the current record for ambient pressure organic superconductors, 11.6 K in kappa-(ET)(2)Cu[N(CN)(2)]Br. A fourth phase, (ET)(2)Ag(CF3)(4), crystallizes simultaneously with the plates and needles, contains no solvent molecules, and does not superconduct down to 0.7 K. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. UNIV COLOGNE,INST ANORGAN CHEM,D-50939 COLOGNE,GERMANY. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. LAKE SHORE CRYOTRON INC,WESTERVILLE,OH 43081. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NR 20 TC 40 Z9 40 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 20 PY 1994 VL 233 IS 3-4 BP 379 EP 386 DI 10.1016/0921-4534(94)90766-8 PG 8 WC Physics, Applied SC Physics GA PT740 UT WOS:A1994PT74000020 ER PT J AU KANG, WN KIM, DH PARK, JH HAHN, TS CHOI, SS GRAY, KE AF KANG, WN KIM, DH PARK, JH HAHN, TS CHOI, SS GRAY, KE TI ORIGIN OF 1/F NOISE PEAKS OF YBA2CU3OX FILMS IN A MAGNETIC-FIELD SO PHYSICA C LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; FLUX-FLOW NOISE; 1-F NOISE; RESISTANCE FLUCTUATIONS; RESISTIVE TRANSITION AB The temperature and magnetic-field dependence of 1/f noise from voltage fluctuations has been measured in epitaxial YBa2Cu3Ox films. In a magnetic field, two noise peaks were observed as temperature is reduced; one at higher temperature showed no magnetic-field dependence, while the peak near the zero-resistance transition temperature showed clear magnetic-field dependence. We show that the field-dependent noise is due to flux motion interacting with the pinning potential. A classical model is used to explain the flux-motion-induced noise peaks. The origin of the noise peaks is interpreted as due to the opposite temperature dependences of the flux-bundle size and the sample resistance. A rough estimate of the temperature and magnetic-field dependence of the flux-bundle size is presented. C1 KOREA INST SCI & TECHNOL, APPL PHYS GRP, SEOUL 136791, SOUTH KOREA. ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. NR 24 TC 11 Z9 11 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 20 PY 1994 VL 233 IS 3-4 BP 402 EP 408 DI 10.1016/0921-4534(94)90769-2 PG 7 WC Physics, Applied SC Physics GA PT740 UT WOS:A1994PT74000023 ER PT J AU SHARP, JW ERES, G AF SHARP, JW ERES, G TI KINETICS OF HYDROGEN DESORPTION FROM SI(100) AND SI(111) SURFACES FOLLOWING CHEMISORPTION OF DISILANE AND TRISILANE SO SURFACE SCIENCE LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; PI-BONDED DIMERS; THIN-FILM GROWTH; RECOMBINATIVE DESORPTION; REFLECTANCE DIFFERENCE; SEMICONDUCTOR SURFACE; ADSORPTION; SPECTROSCOPY; GERMANIUM; H-2 AB The kinetics of hydrogen desorption from Si(100) and Si(111) surfaces during epitaxial silicon thin film growth from disilane and trisilane was investigated using differential surface reflectance. For both source molecules, first-order hydrogen desorption was observed from Si(100), and an intermediate reaction order was found on Si(111). C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RI Eres, Gyula/C-4656-2017 OI Eres, Gyula/0000-0003-2690-5214 NR 29 TC 15 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 20 PY 1994 VL 320 IS 1-2 BP 169 EP 173 DI 10.1016/0039-6028(94)00515-X PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PT178 UT WOS:A1994PT17800022 ER PT J AU HORN, KM CHASON, E TSAO, JY FLORO, JA PICRAUX, ST AF HORN, KM CHASON, E TSAO, JY FLORO, JA PICRAUX, ST TI OXYGEN ROUGHENING OF GE(001) SURFACES SO SURFACE SCIENCE LA English DT Article ID MOLECULAR-BEAM EPITAXY; GE(100); GROWTH; GE AB The interaction of molecular oxygen with the Ge(001) surface is studied in terms of the immediate disordering effects which occur as oxygen impinges on the germanium surface. Using reflection high energy electron diffraction, the surface morphology of initially clean, smooth Ge(001) surfaces is monitored in situ, in real time, during exposure to molecular oxygen. Changes in the (001) surface dimer reconstruction, surface disordering, and ultimately, multi-level roughening of the surface are observed. The pressure and temperature dependence of the oxygen-induced surface disordering rate is presented. Details of the initial oxygen-germanium surface interaction are discussed in the context of changes to surface morphology and compared to previously proposed roughening and oxidation mechanisms which are based upon both mass-sensitive and chemically-sensitive surface analysis techniques. RP HORN, KM (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 21 TC 10 Z9 10 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 20 PY 1994 VL 320 IS 1-2 BP 174 EP 184 DI 10.1016/0039-6028(94)00509-5 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PT178 UT WOS:A1994PT17800023 ER PT J AU SMITH, DE DANG, LX AF SMITH, DE DANG, LX TI INTERIONIC POTENTIALS OF MEAN FORCE FOR SRCL2 IN POLARIZABLE WATER - A COMPUTER-SIMULATION STUDY SO CHEMICAL PHYSICS LETTERS LA English DT Article ID CHLORIDE ION-PAIR; MOLECULAR-DYNAMICS SIMULATIONS; CALCIUM AB Potentials of mean force (PMFs) and solvation properties of SrCl2 in polarizable water have been studied using molecular dynamics simulations. The PMF between isolated Sr2+ and Cl- ions involves a stable contact ion-pair state with a binding free energy of -1.8 kcal/mol and a dissociation barrier of 3.5 kcal/mol. A solvent-separated state is observed to have comparable free energy and a minimal barrier for dissociation to free ions. The PMF between a second Cl- ion and the Sr2+...Cl- contact ion pair has also been calculated. The Cl-...Sr2+...Cl- complex is nonlinear and involves a bridging water molecule strongly hydrogen-bound to both chlorine ions. RP SMITH, DE (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 24 TC 26 Z9 26 U1 3 U2 17 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 NOV 18 PY 1994 VL 230 IS 1-2 BP 209 EP 214 DI 10.1016/0009-2614(94)01118-4 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PR847 UT WOS:A1994PR84700034 ER PT J AU RECINOS, A SILVEY, KJ OW, DJ JENSEN, RH STANKER, LH AF RECINOS, A SILVEY, KJ OW, DJ JENSEN, RH STANKER, LH TI SEQUENCES OF CDNAS ENCODING IMMUNOGLOBULIN HEAVY-CHAIN AND LIGHT-CHAIN VARIABLE REGIONS FROM 2 ANTI-DIOXIN MONOCLONAL-ANTIBODIES SO GENE LA English DT Note DE RECOMBINANT DNA; MOUSE HYBRIDOMAS; POLYCHLORINATED DIBENZO-P-DIOXINS; ANTIBODY STRUCTURE AB We report the cDNA cloning of the gamma- and kappa-chain-encoding genes for two mouse monoclonal antibodies (mAb) which recognize dioxins. The nucleotide sequences encoding the variable regions of these mAb were also determined. Although the mAb have similar dioxin-binding characteristics, their deduced variable region amino-acid sequences are very different. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94550. NR 3 TC 13 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD NOV 18 PY 1994 VL 149 IS 2 BP 385 EP 386 DI 10.1016/0378-1119(94)90185-6 PG 2 WC Genetics & Heredity SC Genetics & Heredity GA PT811 UT WOS:A1994PT81100036 PM 7959026 ER PT J AU HADDAD, WS MCNULTY, I TREBES, JE ANDERSON, EH LEVESQUE, RA YANG, L AF HADDAD, WS MCNULTY, I TREBES, JE ANDERSON, EH LEVESQUE, RA YANG, L TI ULTRAHIGH-RESOLUTION X-RAY TOMOGRAPHY SO SCIENCE LA English DT Article ID MICROSCOPY; SPERM AB Ultrahigh-resolution three-dimensional images of a microscopic test object were made with soft x-rays collected with a scanning transmission x-ray microscope. The test object consisted of two different patterns of gold bars on silicon nitride windows that were separated by similar to 5 micrometers. Depth resolution comparable to the transverse resolution was achieved by recording nine two-dimensional images of the object at angles between -50 and +55 degrees with respect to the beam axis. The projections were then combined tomographically to form a three-dimensional image by means of an algorithm using an algebraic reconstruction technique. A transverse resolution of similar to 1000 angstroms was observed. Artifacts in the reconstruction limited the overall depth resolution to similar to 6000 angstroms; however, some features were clearly reconstructed with a depth resolution of similar to 1000 angstroms. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. RP HADDAD, WS (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 23 TC 85 Z9 87 U1 4 U2 15 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD NOV 18 PY 1994 VL 266 IS 5188 BP 1213 EP 1215 DI 10.1126/science.266.5188.1213 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PT132 UT WOS:A1994PT13200046 PM 17810262 ER PT J AU LUNACHAVEZ, C GONG, EL FORTE, TM NICHOLS, AV AF LUNACHAVEZ, C GONG, EL FORTE, TM NICHOLS, AV TI SODIUM OLEATE-FACILITATED REASSEMBLY OF APOLIPOPROTEIN-A-I WITH PHOSPHATIDYLCHOLINE SO BIOCHIMICA ET BIOPHYSICA ACTA-LIPIDS AND LIPID METABOLISM LA English DT Article DE APOLIPOPROTEIN A-I; EGG YOLK PHOSPHATIDYLCHOLINE; SODIUM OLEATE; COMPLEX REASSEMBLY; SMALL LIPID-POOR PARTICLE ID HIGH-DENSITY-LIPOPROTEIN; GRADIENT GEL-ELECTROPHORESIS; CHOLESTEROL ACYLTRANSFERASE; PARTICLES; COMPLEXES; CHARGE; RECOMBINANTS; LECITHIN; PATHWAYS; HDL AB The influence of sodium oleate (oleate) on complexing of apolipoprotein A-I (ape A-I) with egg yolk phosphatidylcholine (EYPC) was evaluated. Without the use of additional detergent such as sodium cholate, oleate facilitates formation of a single complex of unique stoichiometry, approx. 76:2:20, molar ratio EYPC/apo A-I/oleate, and mean size 7.4 nm with round to ellipoidal morphology. Near complete reassembly of apo A-I into the complex occurs when the stoichiometry of the mixture approximates that of the complex itself. With increasing content of EYPC in the mixture, the same complex is formed but in decreasing yield; larger complexes are not formed. The rate of complex formation decreases with increase of EYPC in the mixture. Reduction of pH in the reassembly mixture from 8.0 to 5.4 results in a marked reduction in complex formation indicating that ionized oleate facilitates lipidation. Removal of oleate by interaction of the complex with fatty acid-free human serum albumin does not degrade the complex. Incorporation of increasing amounts of unesterified cholesterol into the EYPC-sonicate progressively inhibits oleate-facilitated complex formation. This study shows that oleate, a physiologically relevant lipolysis-derived product, facilitates reassembly of apo A-I with EYPC and promotes formation of a small lipid-poor particle similar to that observed in nascent HDL and during in vivo or in vitro lipolysis of triacylglycerol-rich lipoproteins in the presence of HDL. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. FU NHLBI NIH HHS [HL 46281-03] NR 30 TC 3 Z9 3 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0005-2760 J9 BBA-LIPID LIPID MET JI Biochim. Biophys. Acta-Lipids Lipid Metab. PD NOV 17 PY 1994 VL 1215 IS 1-2 BP 141 EP 149 DI 10.1016/0005-2760(94)90103-1 PG 9 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PT246 UT WOS:A1994PT24600017 PM 7947996 ER PT J AU FAN, JW WANG, LS AF FAN, JW WANG, LS TI A STUDY OF FEC2 AND FEC2H BY ANION PHOTOELECTRON-SPECTROSCOPY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID ALKYNE METATHESIS; IRON ATOMS; SPECTRA; SPECTROMETER; COMPLEXES; ACETYLENE; TUNGSTEN; ABINITIO; IONS AB The photoelectron spectra of FeC2- and FeC2(D)(-) are studied at 3.49 eV photon energy. The electron affinities of FeC2 and FeC2H(D) are determined to be 1.91(10) and 1.41(5) eV, respectively. An excited state of FeC2 at 1 eV above its ground state is also observed. Only one major detachment channel is observed for FeC2H(D)(-). A vibrationally resolved spectrum at 2.33 eV photon energy for FeC2D- is also obtained with a Fe-C stretching progression, yielding a vibrational frequency of 500(100) cm(-1). The spectra provide unique information on the bonding between Fe and C-2 and C2H(D). C1 WASHINGTON STATE UNIV, DEPT PHYS, RICHLAND, WA 99352 USA. PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 23 TC 48 Z9 50 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD NOV 17 PY 1994 VL 98 IS 46 BP 11814 EP 11817 DI 10.1021/j100097a002 PG 4 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200002 ER PT J AU BITTNER, T IRRGANG, KD RENGER, G WASIELEWSKI, MR AF BITTNER, T IRRGANG, KD RENGER, G WASIELEWSKI, MR TI ULTRAFAST EXCITATION-ENERGY TRANSFER AND EXCITON-EXCITON ANNIHILATION PROCESSES IN ISOLATED LIGHT-HARVESTING COMPLEXES OF PHOTOSYSTEM-II (LHC-II) FROM SPINACH SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID CHLOROPHYLL-A/B PROTEIN; PHOTOSYNTHETIC SYSTEMS; FLUORESCENCE; MEMBRANES; ANTENNA; YIELD AB Excitation energy transfer and exciton-exciton annihilation in the isolated light-harvesting chlorophyll a/b protein complex of spinach photosystem II (LHC II) has been studied by two-color absorption difference spectroscopy with femtosecond time resolution. After selectively exciting Chl b at 645 nm, the transient absorption changes were monitored at wavelengths where either Chl b (655 nm) or Chl a (680 nm) dominates the absorption of LHC II. From the good correspondence of the lifetimes obtained from a numerical analysis of the very fast relaxation in the CN b absorption band (160 +/- 20 fs) and the rise kinetics in the Chl a absorption band (145 +/- 20 fs), it is suggested that the Chl b --> Chl a excitation energy transfer occurs on a time scale of about 150 fs. In addition, at both probe wavelengths (655 and 680 nm) lifetimes of 3-7 ps were observed which likely arise from excitation energy transfer processes connected with spectral shifting. The kinetic curves of the transient absorption changes at 680 nm show a remarkable intensity dependence which is ascribed to exciton-exciton annihilation. Since at a probe wavelength of 655 nm no intensity effect on the kinetics was observed, it is concluded that annihilation processes preferably occur among excited singlet states of Chl a molecules. From the time course of the transient absorption changes at 680 nm, the bimolecular annihilation constant (gamma 2') was estimated to be 2.5 x 10(-10) cm(3) s(-1). The experimental results on the exciton dynamics in LHC II are discussed in view of the new structural data on this antenna protein. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. TECH UNIV BERLIN,MAX VOLMER INST,D-10623 BERLIN,GERMANY. NR 28 TC 93 Z9 96 U1 2 U2 13 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 NOV 17 PY 1994 VL 98 IS 46 BP 11821 EP 11826 DI 10.1021/j100097a004 PG 6 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200004 ER PT J AU IRWIN, AD ASSINK, RA HENDERSON, CC CAHILL, PA AF IRWIN, AD ASSINK, RA HENDERSON, CC CAHILL, PA TI STUDY OF THE REORIENTATIONAL MOTION OF C60H2 IN TOLUENE-D(8) BY PROTON NMR SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SOLID-STATE; C-60; RELAXATION; DYNAMICS; ROTATION AB The proton spin-lattice relaxation time (T-1) of C60H2 in toluene-d(8) was measured between 281 and 338 K. Correlation times calculated from these T-1 measurements an compared with those calculated from viscosity-temperature data via the Stokes-Einstein-Debye and Gierer-Wirtz microviscosity equations and with values reported for C-60 by C-13 NMR. At room temperature, C60H2 in toluene rotates at about the same rate as solid-state C-60. The Stokes-Einstein-Debye theory predicts reorientational correlation times (tau(c)) that are a factor of 6-8 higher than observed, while the Gierer-Wirtz modification gives tau(c) values that are 1.3-1.7 times those observed. in addition, a re-evaluation of previously published results shows that the C-13 spin-lattice relaxation of C-60 in toluene-d(8) has significant contributions from bath the chemical shift anisotropy and spin-rotation mechanisms. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. SANDIA NATL LABS,LIVERMORE,CA 94551. RP IRWIN, AD (reprint author), BUTLER UNIV,DEPT CHEM,INDIANAPOLIS,IN 46208, USA. NR 21 TC 10 Z9 10 U1 0 U2 0 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 NOV 17 PY 1994 VL 98 IS 46 BP 11832 EP 11834 DI 10.1021/j100097a006 PG 3 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200006 ER PT J AU PFUND, DM ZEMANIAN, TS LINEHAN, JC FULTON, JL YONKER, CR AF PFUND, DM ZEMANIAN, TS LINEHAN, JC FULTON, JL YONKER, CR TI FLUID-STRUCTURE IN SUPERCRITICAL XENON BY NUCLEAR-MAGNETIC-RESONANCE SPECTROSCOPY AND SMALL-ANGLE X-RAY-SCATTERING SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID NMR CHEMICAL-SHIFTS; CARBON-DIOXIDE; MIXTURES; DILUTE; XE-129; CALIBRATION; TEMPERATURE; METHANOL; ETHANE AB Chemical shifts for Xe-129 at 25 degrees C are presented for densities between 5 x 10(-3) and 2.2 x 10(-2) mol/cm(3), corresponding to pressures between 50 and 1000 bar. Also presented art small angle X-ray scattering results for xenon at 28 and 45 degrees C and pressures between 30 and 400 bar. The scattering results reveal the expected increase in aggregation and correlation length near the critical density. The chemical shifts exhibit deviations from the second-order virial equation over a broad range of densities. These deviations are also evident in calculations from integral equation theory. A departure from the cage model of solvent nearest neighbors due to repulsive solvation effects is discussed as a possible source of these deviations. C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. NR 45 TC 73 Z9 73 U1 0 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD NOV 17 PY 1994 VL 98 IS 46 BP 11846 EP 11857 DI 10.1021/j100097a009 PG 12 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200009 ER PT J AU SNURR, RQ BELL, AT THEODOROU, DN AF SNURR, RQ BELL, AT THEODOROU, DN TI INVESTIGATION OF THE DYNAMICS OF BENZENE IN SILICALITE USING TRANSITION-STATE THEORY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MOLECULAR-DYNAMICS; COMPUTER-SIMULATION; AROMATIC-MOLECULES; PARA-XYLENE; DIFFUSION; METHANE; ADSORPTION; ZEOLITES; ZSM-5; LOCATION AB The dynamics of benzene in silicalite at low loading was investigated using transition-state theory. Benzene was found to diffuse by infrequent hops between preferred adsorption sites. Potential energy minima and saddle points were located using an atomistic model, and diffusion paths connecting pairs of minima were constructed through each saddle point (transition state). The intrinsic reaction coordinate (IRC) approach was used to construct the diffusion paths in six dimensions. The IRC equations are presented for the motion of a rigid body (benzene) through a static potential field (silicalite). A rate constant for each transition between minima was calculated using a harmonic approximation to the potential energy function. From the rate constants. the self-diffusivity was computed with a dynamic Monte Carlo simulation, An activation energy of 36.7 kJ/mol was calculated. This is larger than the experimental value, and the predicted diffusivities are 1-2 orders of magnitude smaller than experiment. Likely reasons for this discrepancy are the harmonic approximation invoked in calculating the rate constants and our neglect of zeolite flexibility in the calculations. The predicted time scales for local motions within the channel intersections agree well with spectroscopic results. Many of these motions correspond to rotations of the benzene molecule about its C-6 axis. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. RI Snurr, Randall/B-6699-2009; Snurr, Randall/E-4900-2011; OI Theodorou, Doros/0000-0002-4763-9739; Bell, Alexis/0000-0002-5738-4645 NR 51 TC 81 Z9 81 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 NOV 17 PY 1994 VL 98 IS 46 BP 11948 EP 11961 DI 10.1021/j100097a022 PG 14 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200022 ER PT J AU WU, GW CHU, B SCHNEIDER, DK AF WU, GW CHU, B SCHNEIDER, DK TI SMALL-ANGLE NEUTRON-SCATTERING STUDY OF POLYMERIC MICELLAR STRUCTURES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID OSCILLATORY SHEAR MEASUREMENTS; OXIDE) TRIBLOCK COPOLYMER; AQUEOUS-SOLUTION; LIGHT-SCATTERING; AGGREGATION BEHAVIOR; O-XYLENE; WATER AB Polymeric micellar structures formed by a PEO-PPO-PEO copolymer in o-xylene in the presence of water were investigated by small-angle neutron scattering. In order to reveal the detailed micellar structure, different contrasts among the micellar core, the micellar shell, and the dispersing medium (background) were constructed by selectively changing the protonated/deuterated combination of water and xylene. The micellar structure could be well described by a core-shell structure with the scattering behavior of the micellar shell being very similar to that of a star polymer. The solubilized water existed not only in the micellar core but also in the micellar shell. The volume fraction of copolymer segments in the micellar shell was rather low, being of the order of 0.2. There seemed to be no sharp interface between the micellar con and the micellar shell. C1 SUNY STONY BROOK,DEPT CHEM,STONY BROOK,NY 11794. SUNY STONY BROOK,DEPT MAT SCI & ENGN,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 25 TC 22 Z9 23 U1 1 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 NOV 17 PY 1994 VL 98 IS 46 BP 12018 EP 12024 DI 10.1021/j100097a030 PG 7 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200030 ER PT J AU KUHN, M RODRIGUEZ, JA AF KUHN, M RODRIGUEZ, JA TI INTERACTION OF SULFUR WITH BIMETALLIC SURFACES - COADSORPTION OF SULFUR AND NOBLE-METALS ON RU(001) SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID X-RAY PHOTOELECTRON; SINGLE-CRYSTAL SURFACES; CHEMICAL-PROPERTIES; CO CHEMISORPTION; ADSORPTION; SILVER; CU; CATALYSIS; SPECTRA; XPS AB The coadsorption of S with Cu or Ag on Ru(001) has been investigated using TDS, XPS, XAES, and CO chemisorption. At 300 K, copper and silver atoms in contact with Ru(001) react with S-2 to form noble-metal sulfides. The Cu-S and Ag-S bonds in these surface compounds break at high temperatures (>800 K) producing sulfur and noble-metal adatoms that compete for the ruthenium electrons. This competition leads to a weakening of 5-6 kcal/mol in the strength of the Ru-Cu and Ru-Ag bonds. A sulfur adatom produces long-range perturbations on the surface, diminishing the ability for bimetallic bonding of several (5-10) adjacent ruthenium atoms. At theta(s) = 0.2 ML (ML = monolayer), all the ruthenium sites show a strong weakening in their bonding interactions with copper or silver adatoms. Photoemission experiments examining the interaction of S-2 with copper and silver multilayers at 300 K show the formation of thick films of Cu2S and Ag2S at a fast rate. The decomposition pathways for these films are similar: evolution of S-2 into gas phase, with the noble metal remaining solid. For Ag2S films the decomposition process starts around 800 K, whereas Cu2S films are stable up to 950 K. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 61 TC 32 Z9 32 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 NOV 17 PY 1994 VL 98 IS 46 BP 12059 EP 12066 DI 10.1021/j100097a035 PG 8 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200035 ER PT J AU JOHNSON, GK DADYBURJOR, DB SMITH, DH AF JOHNSON, GK DADYBURJOR, DB SMITH, DH TI DISPERSION MORPHOLOGY DIAGRAMS FOR 3-PHASE, MICROEMULSION EMULSIONS .2. DISAPPEARANCE OF MORPHOLOGY-TRANSITION LINES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID WATER-SYSTEM; INVERSION; CATASTROPHE; MIXTURES AB The limits over which the oil-rich top phase (T) middle-phase microemulsion (M), or water-rich bottom phase (B) is the continuous phase in steady-state, three-phase macroemulsions have been determined by means of electrical conductivity measurements for the amphiphile/oil/''water'' system C6H13(OC2H4)(2)OH/n-tetradecane/aqueous 10 mM NaCl. Measurements were made at three different temperatures and apparent wettability conditions: (a) 45 degrees C, wetting middle phase; (b) 25 degrees C, no wetting phase; and (c) 12 degrees C, wetting bottom phase. The results at 25 degrees C were in accord with expectations from previous predictions and experiments; but for both two-phase and three-phase :emulsions no abrupt, ''first-order'' transitions between M- and T-continuous emulsions at 45 degrees C or between M- and B-continous emulsions at 12 degrees C were found. Instead, these changes of continuous phase appeared to occur smoothly and continuously between their respective single-phase and two-phase limits. It is not yet clear if the ''disappearance'' of first-order morphology transitions correlates with phase wettability transitions; the phenomenon suggests the possibility of bicontinuous two-phase and three-phase macroemulsions. C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507. W VIRGINIA UNIV,DEPT CHEM ENGN,MORGANTOWN,WV 26506. NR 31 TC 8 Z9 8 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 NOV 17 PY 1994 VL 98 IS 46 BP 12097 EP 12102 DI 10.1021/j100097a041 PG 6 WC Chemistry, Physical SC Chemistry GA PT442 UT WOS:A1994PT44200041 ER PT J AU HIROTA, S OGURA, T APPELMAN, EH SHINZAWAITOH, K YOSHIKAWA, S KITAGAWA, T AF HIROTA, S OGURA, T APPELMAN, EH SHINZAWAITOH, K YOSHIKAWA, S KITAGAWA, T TI OBSERVATION OF A NEW OXYGEN-ISOTOPE-SENSITIVE RAMAN BAND FOR OXYHEMOPROTEINS AND ITS IMPLICATIONS IN HEME POCKET STRUCTURES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CYTOCHROME-C-OXIDASE; RESONANCE RAMAN; STRETCHING VIBRATIONS; HUMAN OXYHEMOGLOBIN; DIOXYGEN MATRICES; PROTEIN CRYSTALS; HUMAN-HEMOGLOBIN; BOUND DIOXYGEN; COMPOUND-A; O-O AB A new oxygen-isotope-sensitive Raman band was found for oxyhemoglobin (HbO(2)) and oxycytochrome c oxidase (CcO.O-2) in the frequency region lower than the Fe-O-2 stretching mode (nu(Fe-O2)). This band was located at 425 cm(-1) for Hb(16)O(2) and shifted to 405 cm(-1) with Hb(18)O(2) and to similar to 423 and similar to 407 cm(-1) with Hb(16)O(18)O. Th, corresponding band appeared at 435 cm(-1) for CCO.O-16(2) and shifted to 415 cm(-1) with CCO.O-18(2), Accordingly, the band has been assigned to the Fe-O-O bending mode (delta(FeOO)) However, the corresponding band could not be identified for oxymyoglobin (MbO(2)). The Fe-On stretching mode (nu(Fe-O2)) was observed at 568, 567, 544, and 544 cm(-1) for Hb(16)O(2), Hb(16)O(18)O(2), Hb(18)O(16)O(2), Hb(18)O(2), respectively, and the corresponding modes were observed at 571, 569, 547, and 545 cm(-1) for MbO(2) and 571, 567, 548, and 544 cm(-1) for CcO.O-2. The nu(Fe-O2) bandwidths of HbO(2) and MbO(2) were alike and 1.5 times broader than that of CcO.O-2, suggesting that the Fe-O-O geometry is more nearly fixed in the latter. Despite the greatly different reactivities of bound O-2 in HbO(2) and CcO.O-2, their nu(Fe-O2) and delta(FeOO) frequencies and O-2-isotopic frequency shifts were alike, indicating similar Fe-O-O binding geometries. Normal coordinate calculations for an isolated three-atom molecule could reproduce the observed isotopic frequency shifts with the 115 degrees bond angle reported for MbO(2), but not with the 155 degrees angle reported for HbO(2). C1 OKAZAKI NATL RES INST,INST MOLEC SCI,OKAZAKI,AICHI 444,JAPAN. GRAD UNIV ADV STUDIES,OKAZAKI,AICHI 444,JAPAN. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. HIMEJI INST TECHNOL,FAC SCI,DEPT LIFE SCI,KAMIGORI,HYOGO 67812,JAPAN. NR 50 TC 55 Z9 55 U1 0 U2 7 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 NOV 16 PY 1994 VL 116 IS 23 BP 10564 EP 10570 DI 10.1021/ja00102a025 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA PT130 UT WOS:A1994PT13000025 ER PT J AU GLENDENING, ED FELLER, D THOMPSON, MA AF GLENDENING, ED FELLER, D THOMPSON, MA TI AN AB-INITIO INVESTIGATION OF THE STRUCTURE AND ALKALI-METAL CATION SELECTIVITY OF 18-CROWN-6 SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID EXTRACTION CHROMATOGRAPHIC RESIN; MOLECULAR-DYNAMICS SIMULATION; EFFECTIVE CORE POTENTIALS; CROWN-ETHER COMPLEXES; GAUSSIAN-BASIS SETS; GAS-PHASE; SOLVENT-EXTRACTION; FREE-ENERGY; ION COMPLEXATION; AQUEOUS-SOLUTION AB We present an ab initio, quantum mechanical study of 18-crown-6 (18c6) and its interaction with the alkali metal cations Li+, Na+, K+, Rb+, and Cs+. Geometries, binding energies, and binding enthalpies are evaluated at the restricted Hartree-Fock (RHF) level using standard basis sets (3-21G and 6-31+G*) and relativistic effective core potentials. Electron correlation effects are determined at the MP2 level, and wave function analysis is performed by the natural bond orbital (NBO) and associated methods. The affinity of 18c6 for the alkali metal cations is quite strong (50-100 kcal mol(-1), depending on cation type), arising largely from the electrostatic (ionic) interaction of the cation with the nucleophilic ether backbone. Charge transfer (covalent bonding) contributions are somewhat less important, only 20-50% as strong as the electrostatic interaction. Agreement of the calculated binding enthalpies and experimentally determined quantities is rather poor. For example, the binding energy for K+/18c6 (-71.5 kcal mol(-1)) is about 30 kcal mol(-1) stronger than that determined by experiment, and it is not clear how to reconcile this difference. Our calculations clearly show that solvation effects strongly influence cation selectivity. Gas-phase 18c6 preferentially binds Li+, not K+ as found in aqueous environments. We show, however, that K+ selectivity is recovered when even a few waters of hydration are considered. RP GLENDENING, ED (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 59 TC 316 Z9 316 U1 8 U2 48 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 NOV 16 PY 1994 VL 116 IS 23 BP 10657 EP 10669 DI 10.1021/ja00102a035 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA PT130 UT WOS:A1994PT13000035 ER PT J AU GOLDBERG, DM YAN, J NG, E DIAMANDIS, EP KARUMANCHIRI, A SOLEAS, G WATERHOUSE, AL AF GOLDBERG, DM YAN, J NG, E DIAMANDIS, EP KARUMANCHIRI, A SOLEAS, G WATERHOUSE, AL TI DIRECT-INJECTION GAS-CHROMATOGRAPHIC MASS-SPECTROMETRIC ASSAY FOR TRANS-RESVERATROL SO ANALYTICAL CHEMISTRY LA English DT Article ID PHYTOALEXIN RESVERATROL; RED WINE; 3,5,4'-TRIHYDROXYSTILBENE; CONSUMPTION; VINIFERINS; DISEASE; ALCOHOL; LEAVES AB We have developed a novel method to measure the concentration of the trihydroxystilbene trans-resveratrol suitable for the analysis of wine and other biological materials. Solid-phase extraction is carried out on a reversed-phase disposable C-18 cartridge with elution of trans-resveratrol by ethyl acetate. From the first 1 mL of the eluate collected, 1 mu L is injected directly into a gas chromatograph/mass spectrometer coupled through a DB-5 column. The molecular ion at a mass of 228 was quantitated by selective ion monitoring using as standard trans-resveratrol synthesized by a Wittig reaction. The method was linear up to 10 mg/L with a detection limit of 0.05 mg/L, which can be increased 10-fold if required. Recovery of added synthetic trans-resveratrol in wine ranged from 83 to 111% with a mean of 100%. Within-run precision was 5-7%. The method is faster and simpler than those previously published, which use organic-phase extraction, and yields higher values in wine presumably as a consequence of minimal loss during the solid-phase extraction. The trans-resveratrol. concentration of wine is stable when protected from light for at least 6 weeks at 4 degrees C and for at least 1 week at room temperature. C1 LIQUOR CONTROL BOARD ONTARIO,DEPT QUAL ASSURANCE,TORONTO M5E 1A4,ON,CANADA. TORONTO HOSP,DEPT CLIN BIOCHEM,TORONTO M5T 2S8,ON,CANADA. ANDRES WINES LTD,GRIMSBY L8E 5S4,ON,CANADA. LAWRENCE LIVERMORE NATL LAB,DEPT VITICULTURE & ENOL,DAVIS,CA 95616. RP GOLDBERG, DM (reprint author), UNIV TORONTO,BANTING INST,DEPT CLIN BIOCHEM,100 COLL ST,TORONTO M5G 1L5,ON,CANADA. RI Waterhouse, Andrew /F-6719-2011; OI Waterhouse, Andrew /0000-0002-5088-7442; Diamandis, Eleftherios/0000-0002-1589-820X NR 25 TC 73 Z9 78 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD NOV 15 PY 1994 VL 66 IS 22 BP 3959 EP 3963 DI 10.1021/ac00094a017 PG 5 WC Chemistry, Analytical SC Chemistry GA PQ977 UT WOS:A1994PQ97700017 ER PT J AU CHEN, RD WU, AY MITCHELL, DW HOFSTADLER, SA ROCKWOOD, AL SMITH, RD AF CHEN, RD WU, AY MITCHELL, DW HOFSTADLER, SA ROCKWOOD, AL SMITH, RD TI DIRECT CHARGE NUMBER AND MOLECULAR-WEIGHT DETERMINATION OF LARGE INDIVIDUAL IONS BY ELECTROSPRAY-IONIZATION FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE MASS-SPECTROMETRY SO ANALYTICAL CHEMISTRY LA English DT Article ID Z-MOTION; EXCITATION; CELL; SIGNAL; SPECTROSCOPY; BIOMOLECULES AB The coupling of electrospray ionization (ESI) techniques with Fourier transform ion cyclotron resonance (FTICR) mass spectrometry allows the analysis of individual (i.e., single) multiply charged ions. In this paper, we demonstrate that individual large ions can be directly characterized through their excitation and ejection behavior in the FTICR cell. We also report the direct measurement of the charge carried by an individual poly (ethylene glycol) ion (5 X 10(6) nominal molecular weight) and thus obtain the molecular weight of an individual ion (similar to 4.1 X 10(6)) directly from the m/z measurement. These results confirm that the observed ions are indeed large individual molecular ions produced by ESI, as opposed to small fragments, and that an approximate molecular weight can be directly measured on the basis of charge determination and measured m/z. This capability augments the ability for more precise mass determination based upon the observation of a known reaction process (e.g., proton transfer) for individual ions. C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 39 TC 21 Z9 21 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD NOV 15 PY 1994 VL 66 IS 22 BP 3964 EP 3969 DI 10.1021/ac00094a018 PG 6 WC Chemistry, Analytical SC Chemistry GA PQ977 UT WOS:A1994PQ97700018 ER PT J AU NIENHAUS, GU MOURANT, JR CHU, K FRAUENFELDER, H AF NIENHAUS, GU MOURANT, JR CHU, K FRAUENFELDER, H TI LIGAND-BINDING TO HEME-PROTEINS - THE EFFECT OF LIGHT ON LIGAND-BINDING IN MYOGLOBIN SO BIOCHEMISTRY LA English DT Article ID RESONANCE RAMAN-SPECTRA; CARBON-MONOXIDE; CO-BINDING; STRUCTURAL HETEROGENEITY; DIFFUSIVE DYNAMICS; FLASH-PHOTOLYSIS; HEMOGLOBIN; RELAXATION; SPECTROSCOPY; CARBONMONOXYMYOGLOBIN AB Extended illumination slows the rebinding of CO tb myoglobin after photodissociation at cryogenic temperatures. Two types of models have been put forward to explain the effect: motions of the CO within the heme pocket dr conformational transitions of the protein. To resolve this ambiguity, we have studied the effect of extended illumination on ligand binding to horse and sperm whale myoglobin (hMb and swMb) with temperature-derivative spectroscopy, monitoring the reaction in the CO stretch bands in the infrared and the conformation-sensitive band IU near 760 nm. The experiments show that the stretch frequency of the photodissociated CO does not change upon illumination, implying that the slowing of the CO rebinding is caused by conformational relaxation of Mb from the bound state toward the deoxy structure. The light-induced relaxation (LIR) depends on the number of photons absorbed but not on the light intensity or duration separately. LIR occurs on photon absorption in either the bound or photodissociated state and depends on the temperature at which the MbCO is illuminated. The LIR proceeds in jumps through a small number of conformational substates. The effective barrier for rebinding increases with each step. The substates populated are similar to those found in the thermally-induced relaxation (TIR) that is observed above 160 K. LIR depends markedly on the structural details; it differs for swMbCO and hMbCO and even for the three A substates of swMbCO. Pronounced differences exist between the effects in MbCO and MbO(2). The similarity of LIR and TIR leads to a revised model for ligand binding to swMbCO and hMbCO, in which the relaxation is crucial for the escape of the ligand from the pocket, as was first suggested by Friedman [Friedman, J. M. (1985) Science 228, 1273-1280]. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP NIENHAUS, GU (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. RI Nienhaus, Gerd Ulrich/G-8698-2012 OI Nienhaus, Gerd Ulrich/0000-0002-5027-3192 FU NIGMS NIH HHS [GM 18051] NR 71 TC 107 Z9 107 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 15 PY 1994 VL 33 IS 45 BP 13413 EP 13430 DI 10.1021/bi00249a030 PG 18 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PR785 UT WOS:A1994PR78500030 PM 7947750 ER PT J AU AGUINAGA, MDP KOPSOMBUT, P KOURY, MJ ROA, PD TURNER, EA POPP, RA AF AGUINAGA, MDP KOPSOMBUT, P KOURY, MJ ROA, PD TURNER, EA POPP, RA TI EFFECT OF FOLATE-DEFICIENCY ON HEMOGLOBIN-S IN SICKLE-CELL TRANSGENIC MICE SO BLOOD LA English DT Meeting Abstract C1 VET ADM MED CTR,NASHVILLE,TN. MEHARRY MED COLL,CTR COMPREHENS SICKLE CELL,NASHVILLE,TN 37208. VANDERBILT UNIV,NASHVILLE,TN 37240. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A552 EP A552 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75402189 ER PT J AU ANDERSON, KM SEED, T JEJAH, A HARRIS, JE AF ANDERSON, KM SEED, T JEJAH, A HARRIS, JE TI INHIBITORS OF 5-LIPOXYGENASE INDUCE APOPTOSIS IN CML BLAST CELLS SO BLOOD LA English DT Meeting Abstract C1 RUSH MED COLL,DEPT MED,CHICAGO,IL 60612. RUSH MED COLL,DEPT BIOCHEM,CHICAGO,IL 60612. ARGONNE NATL LAB,ARGONNE,IL 60439. COOK CTY HOSP,DEPT MED,CHICAGO,IL 60612. NR 0 TC 0 Z9 0 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A141 EP A141 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75400548 ER PT J AU AOYAGI, K CONBOY, JG AF AOYAGI, K CONBOY, JG TI A MODEL SYSTEM TO STUDY DEVELOPMENTAL SPLICING SWITCHES IN ERYTHROID PROTEIN 4.1 PREMESSENGER RNA SO BLOOD LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A361 EP A361 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401427 ER PT J AU BAER, MR LO, CH MEANS, J SALZMAN, G FRANKEL, SR LAWRENCE, D MOORE, JO HERZIG, GP SCHIFFER, CA BLOOMFIELD, CD STEWART, CC AF BAER, MR LO, CH MEANS, J SALZMAN, G FRANKEL, SR LAWRENCE, D MOORE, JO HERZIG, GP SCHIFFER, CA BLOOMFIELD, CD STEWART, CC TI MULTIPARAMETER FLOW-CYTOMETRY (MFC) MONITORS RESIDUAL DISEASE (RD) DURING COMPLETE REMISSION (CR) OF ACUTE MYELOID-LEUKEMIA (AML) SO BLOOD LA English DT Meeting Abstract C1 CANC & LEUKEMIA GRP B,LEBANON,NH. NEW YORK STATE DEPT HLTH,ROSWELL PK MEM INST,BUFFALO,NY 14263. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A307 EP A307 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401212 ER PT J AU BALLAS, SK SORETTE, M GREENBAUM, A CREMINS, J LANGLEY, R MOHANDAS, N AF BALLAS, SK SORETTE, M GREENBAUM, A CREMINS, J LANGLEY, R MOHANDAS, N TI MONITORING OF RBC AND RETICULOCYTE HYDRATION STATUS AND SICKLING-INDUCED FRAGMENTATION DURING TREATMENT OF SICKLE-CELL-ANEMIA WITH HYDROXYUREA SO BLOOD LA English DT Meeting Abstract C1 CARDEZA FDN,PHILADELPHIA,PA. MILES INC,TARRYTOWN,NY. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A410 EP A410 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401623 ER PT J AU CHENG, JF MOHANDAS, N PALAZZOLO, M MARTIN, C LOWRY, S ZHU, YW SCOTT, D RUBIN, E AF CHENG, JF MOHANDAS, N PALAZZOLO, M MARTIN, C LOWRY, S ZHU, YW SCOTT, D RUBIN, E TI CONSTRUCTION OF A COMPLETE CLONE BASED MAP OF THE INTERLEUKIN GENE-CLUSTER (5Q31) FOR DIRECTED GENOMIC SEQUENCING SO BLOOD LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV LIFE SCI,CTR HUMAN GENOME,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A581 EP A581 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75402303 ER PT J AU GEE, SL KRAUSS, S ARENAS, J CONBOY, JG AF GEE, SL KRAUSS, S ARENAS, J CONBOY, JG TI A CANDIDATE ERYTHROID PREMESSENGER RNA SPLICING FACTOR HOMOLOGOUS TO YEAST-PRP40 - A PUTATIVE RNA HELICASE SO BLOOD LA English DT Meeting Abstract C1 CALTECH,DIV BIOL,PASADENA,CA 91125. LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A18 EP A18 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75400060 ER PT J AU KAUL, DK FABRY, ME COSTANTINI, F RUBIN, EM NAGEL, RL AF KAUL, DK FABRY, ME COSTANTINI, F RUBIN, EM NAGEL, RL TI IN-VIVO RED CELL-ENDOTHELIAL INTERACTION AND INTRAVASCULAR SICKLING IN A TRANSGENIC MOUSE LINE EXPRESSING SICKLE HEMOGLOBIN SO BLOOD LA English DT Meeting Abstract C1 YESHIVA UNIV ALBERT EINSTEIN COLL MED,BRONX,NY 10461. MONTEFIORE MED CTR,BRONX,NY 10467. COLUMBIA UNIV,NEW YORK,NY 10027. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A220 EP A220 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75400865 ER PT J AU LEWIS, RA ERNST, JD DISCHER, D LUBIN, BH KUYPERS, FA AF LEWIS, RA ERNST, JD DISCHER, D LUBIN, BH KUYPERS, FA TI LOSS OF PHOSPHOLIPID ASYMMETRY IN-VIVO IN SUBPOPULATIONS OF SICKLE CELLS SO BLOOD LA English DT Meeting Abstract C1 CHILDRENS HOSP,OAKLAND RES INST,OAKLAND,CA. UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A413 EP A413 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401633 ER PT J AU PALLAVICINI, MG REDFEARN, WJ NECAS, E BRECHER, G AF PALLAVICINI, MG REDFEARN, WJ NECAS, E BRECHER, G TI LONG-TERM ENGRAFTMENT OF SMALL INOCULA OF STEM-CELL ENRICHED SUBPOPULATIONS IS INDEPENDENT OF CELL DOSE AND DEPENDENT UPON RADIATION CONDITIONING SO BLOOD LA English DT Meeting Abstract C1 DEPT LAB MED,DIV MOLEC CYTOMETRY,SAN FRANCISCO,CA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV PRAGUE,DEPT PATHOPHYSIOL CHARLES,PRAGUE,CZECH REPUBLIC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A499 EP A499 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401978 ER PT J AU PALLAVICINI, MG REDFEARN, WJ NECAS, E BRECHER, G AF PALLAVICINI, MG REDFEARN, WJ NECAS, E BRECHER, G TI ARE CFU-S OR A CFU-SUBSET RESPONSIBLE FOR RADIOPROTECTION SO BLOOD LA English DT Meeting Abstract C1 DEPT LAB MED,DIV MOLEC CYTOMETRY,SAN FRANCISCO,CA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CHARLES UNIV,FAC MED 1,DEPT PATHOPHYSIOL,CS-11636 PRAGUE 1,CZECH REPUBLIC. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A730 EP A730 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75402900 ER PT J AU PASZTY, C MOHANDAS, N STEVENS, M LORING, J RUBIN, E AF PASZTY, C MOHANDAS, N STEVENS, M LORING, J RUBIN, E TI GENE TARGETED DELETION OF BOTH ADULT MURINE ALPHA-GLOBIN GENES - A MOUSE MODEL FOR HYDROPS-FETALIS SO BLOOD LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A505 EP A505 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75402000 ER PT J AU SCHISCHMANOFF, P WINARDI, R DISCHER, D PARRA, M CONBOY, J MOHANDAS, N AF SCHISCHMANOFF, P WINARDI, R DISCHER, D PARRA, M CONBOY, J MOHANDAS, N TI ALTERNATIVE SPLICING AS A STRONG MODULATOR OF FUNCTION IN THE SPECTRIN-ACTIN BINDING DOMAIN OF PROTEIN 4.1 SO BLOOD LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A362 EP A362 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75401428 ER PT J AU VANDORT, HM CHASIS, JA MCGEE, S MOHANDAS, N LOW, PS AF VANDORT, HM CHASIS, JA MCGEE, S MOHANDAS, N LOW, PS TI SIGNIFICANCE OF THE ANKYRIN BAND-3 INTERACTION IN MAINTENANCE OF RED-BLOOD-CELL SHAPE AND STABILITY FOR NORMAL AND SOUTHEAST-ASIAN OVALOCYTE (SAO) CELLS SO BLOOD LA English DT Meeting Abstract C1 PURDUE UNIV,W LAFAYETTE,IN 47907. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 1 Z9 1 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD NOV 15 PY 1994 VL 84 IS 10 SU 1 BP A3 EP A3 PG 1 WC Hematology SC Hematology GA PR754 UT WOS:A1994PR75400001 ER PT J AU SCHNIER, JB GADBOIS, DM NISHI, K BRADBURY, EM AF SCHNIER, JB GADBOIS, DM NISHI, K BRADBURY, EM TI THE KINASE INHIBITOR STAUROSPORINE INDUCES G(1) ARREST AT 2 POINTS - EFFECT ON RETINOBLASTOMA PROTEIN-PHOSPHORYLATION AND CYCLIN-DEPENDENT KINASE-2 IN NORMAL AND TRANSFORMED-CELLS SO CANCER RESEARCH LA English DT Article ID SUSCEPTIBILITY GENE-PRODUCT; MAMMALIAN-CELLS; G1 PHASE; PROGRESSION; FIBROBLASTS; CDK2 AB Staurosporine (ST), a protein kinase inhibitor, at a concentration of 20 nM arrests normal diploid fibroblasts 3 h into G(1), (H. A. Crissman et al., Proc. Natl. Acad. Sci. USA, 88: 7580-7584, 1991; K. Abe et al, Exp. Cell Res., 192: 122-127, 1991). ST (2 nM) induces a new G(1) arrest point at 6 h into G(1). Partial phosphorylation of the retinoblastoma protein was observed at the 2 nM ST arrest point, whereas the retinoblastoma protein was unphosphorylated or underphosphorylated at the 20 nM arrest point. This correlated with the activity of the cyclin-dependent kinase 2 (CDK2) and the phosphorylation of the Thr160 residue of p33(CDK2). The cyclin E and cyclin D1/2 levels were reduced at the 20 nM ST arrest point. In HeLa cells that do not arrest in G(1) in response to 2 or 20 nM ST, the retinoblastoma protein and CDK2 phosphorylations and CDK2 activity were not affected by ST. These results suggest that ST inhibits one or more G1-regulating protein kinases, which lie upstream of CDK2. C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP SCHNIER, JB (reprint author), UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616, USA. FU NIGMS NIH HHS [GM-45890] NR 26 TC 33 Z9 33 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD NOV 15 PY 1994 VL 54 IS 22 BP 5959 EP 5963 PG 5 WC Oncology SC Oncology GA PR217 UT WOS:A1994PR21700040 PM 7954429 ER PT J AU STUBBS, L RINCHIK, EM GOLDBERG, E RUDY, B HANDEL, MA JOHNSON, D AF STUBBS, L RINCHIK, EM GOLDBERG, E RUDY, B HANDEL, MA JOHNSON, D TI CLUSTERING OF 6 HUMAN 11P15 GENE HOMOLOGS WITHIN A 500-KB INTERVAL OF PROXIMAL MOUSE CHROMOSOME-7 SO GENOMICS LA English DT Article ID MOLECULAR ANALYSIS; LOCUS; EXPRESSION; COMPLEX; LINE AB Homologs of genes mapping to human chromosome 11p15 are located in three distinct, widely separated regions of mouse chromosome 7 (Mmu7). To date, six genes have been localized to the most proximal HSA11p15/Mmu7 homology region, including Ldh3 (encoding lactate dehydrogenase C), Ldh1 (lactate dehydrogenase A), Myod1 (myogenic differentiation factor-1), Tph (tryptophan hydroxylase), Saa1 (serum amyloid-A-1), and Kcnc1 (encoding a Shaw-type voltage-gated potassium channel). To define the overall size and organization of this region of Mmu7, we have established a long-range physical map including the murine Ldh1, Ldh3 Saa, Tph, Kcnc1, and Myod1 genes. Our results demonstrate that these six genes are physically clustered and are distributed throughout a 500-kb interval located just proximal of the pink-eyed dilution (p) locus. These data, together with recent mapping studies within the related region of HSA11p15, demonstrate that gene content and organization within this proximal homology segment have been highly conserved throughout evolution. (C) 1994 Academic Press, Inc. C1 NORTHWESTERN UNIV,DEPT BIOCHEM MOLEC BIOL & CELL BIOL,EVANSTON,IL 60208. NYU,MED CTR,DEPT PHYSIOL & BIOPHYS,NEW YORK,NY 10016. NYU,MED CTR,DEPT BIOCHEM,NEW YORK,NY 10016. UNIV TENNESSEE,DEPT ZOOL,KNOXVILLE,TN. RP STUBBS, L (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. OI Stubbs, Lisa/0000-0002-9556-1972 FU NICHD NIH HHS [HD05863]; NINDS NIH HHS [NS30989] NR 30 TC 21 Z9 21 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 NOV 15 PY 1994 VL 24 IS 2 BP 324 EP 332 DI 10.1006/geno.1994.1623 PG 9 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA PX512 UT WOS:A1994PX51200017 PM 7698755 ER PT J AU MATSUSHITA, S ANDO, K KOIKE, S GRDINA, DJ FURUKAWA, S AF MATSUSHITA, S ANDO, K KOIKE, S GRDINA, DJ FURUKAWA, S TI RADIOPROTECTION BY WR-151327 AGAINST THE LATE NORMAL TISSUE-DAMAGE IN MOUSE HIND LEGS FROM GAMMA-RAY RADIATION SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE WR-151327; PHOSPHOROTHIOATE; RADIOPROTECTOR; LEG CONTRACTURE; SKIN SHRINKAGE; LATE RADIATION DAMAGE; NORMAL TISSUE DAMAGE; MOUSE LEGS ID WR-2721; MICE; PROTECTION; CONTRACTURE; IRRADIATION; NEUTRONS; SINGLE AB Purpose: To evaluate the protective effect of WR-151327 on late radiation-induced damage to normal tissues in mice. Methods and Materials: The right hind legs of mice with or without WR-151327 administration (400 mg/kg) were Cs-137 gamma rays. Leg contracture and skin shrinkage assays were performed at 380 days after irradiated with irradiation. The mice were killed on day 400 postirradiation and histological sections of the legs were made. The thickness of the dermis, epidermis, and skin (dermis plus epidermis) was measured. The muscular area of the legs and the posterior knee angle between the femur and tibia were also measured. The left hind legs were similarly assessed as nonirradiated controls. Group means and standard deviations were calculated and dose-response curves were drawn for every endpoint. Then, the dose modifying factor (DMF) for each endpoint and the correlations among endpoints were determined. Results: Late damage assayed by leg contracture and skin shrinkage progressed with increasing radiation dose. However, it was reduced by drug treatment. The significant effect was indicated for skin shrinkage by a DMF of 1.8 at 35%. The DMF for leg contracture was 1.3 at 6 mm. In the irradiated legs, epidermal hyperplasia and dermal fibrosis in the skin, muscular atrophy, and extension disturbance of the knee joint were observed. These changes progressed with increasing radiation dose. Skin damage assayed by the present endpoints was also reduced by drug treatment by DMFs of 1.4 to 1.7. However, DMFs for damage to the muscle and knee were not determined because no isoeffect was observed. There were good correlations between leg contracture or skin shrinkage and the other endpoints in both untreated and drug-treated mice. Conclusions: WR-151327 has the potential to protect against radiation-induced late normal tissue damage. C1 NATL INST RADIOL SCI,DIV CLIN RES,INAGE KU,CHIBA 263,JAPAN. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. RP MATSUSHITA, S (reprint author), NATL INST RADIOL SCI,LAB ANIM SECT,INAGE KU,4-9-1 ANAGAWA,CHIBA 263,JAPAN. NR 17 TC 4 Z9 6 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PD NOV 15 PY 1994 VL 30 IS 4 BP 867 EP 872 PG 6 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA PR109 UT WOS:A1994PR10900018 PM 7960989 ER PT J AU OHBA, T SHAPIRO, SM AOKI, S OTSUKA, K AF OHBA, T SHAPIRO, SM AOKI, S OTSUKA, K TI PHONON SOFTENING IN AU-49.5 AT PERCENT-CD ALLOY SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS LA English DT Article DE AU-CD ALLOY; BETA-PHASE ALLOY; NEUTRON DIFFRACTION; PHONON SOFTENING; PHONON DISPERSION CURVE; ISOTOPE CD-114; MARTENSITIC TRANSFORMATION ID MARTENSITIC PHASE-TRANSFORMATION; NEUTRON-SCATTERING; AU-47.5; AUCUZN2; MODE AB Phonon softening was observed in the parent phase of a AuCd alloy which transforms from the beta2(B2) parent to zeta2'(trigonal) martensite at M(s) = 304 K. Since Cd strongly absorbs neutrons, the isotope Cd-114 was used in preparing the single crystal for the measurements. The [zetazeta0]TA2(uparallel[11BAR0]) phonon branch was measured and found to be anomalously low. A minimum is present at zeta = 0.35 which softens as M(s) approaches from above. The results are consistent with the model proposed by Ohba et al. [Materials Trans. JIM 33 (1992) 29] based upon a crystallographic study of the zeta2' phase. C1 UNIV TSUKUBA,INST MAT SCI,TSUKUBA,IBARAKI 305,JAPAN. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP OHBA, T (reprint author), TEIKYO UNIV,DEPT MAT SCI & ENGN,UTSUNOMIYA 320,JAPAN. NR 19 TC 51 Z9 51 U1 0 U2 3 PU JAPAN J APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG 24-8 SHINBASHI 4-CHOME, MINATO-KU TOKYO 105, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 2 JI Jpn. J. Appl. Phys. Part 2 - Lett. PD NOV 15 PY 1994 VL 33 IS 11B BP L1631 EP L1633 PG 3 WC Physics, Applied SC Physics GA PU894 UT WOS:A1994PU89400019 ER PT J AU ROUTBORT, JL ROTHMAN, SJ AF ROUTBORT, JL ROTHMAN, SJ TI OXYGEN DIFFUSION IN CUPRATE SUPERCONDUCTORS SO JOURNAL OF APPLIED PHYSICS LA English DT Review ID HIGH-TEMPERATURE; TRACER DIFFUSION; INTERNAL-FRICTION; SINGLE-CRYSTALS; CHEMICAL DIFFUSION; DEFECT CHEMISTRY; PARTIAL-PRESSURE; SELF-DIFFUSION; MONTE-CARLO; YBA2CU3O7-DELTA C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NR 84 TC 73 Z9 75 U1 5 U2 8 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 NOV 15 PY 1994 VL 76 IS 10 BP 5615 EP 5628 DI 10.1063/1.357067 PN 1 PG 14 WC Physics, Applied SC Physics GA PT846 UT WOS:A1994PT84600001 ER PT J AU JOHNSON, JN HIXSON, RS GRAY, GT AF JOHNSON, JN HIXSON, RS GRAY, GT TI SHOCK-WAVE COMPRESSION AND RELEASE OF ALUMINUM CERAMIC COMPOSITES SO JOURNAL OF APPLIED PHYSICS LA English DT Article RP JOHNSON, JN (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 24 TC 13 Z9 13 U1 1 U2 5 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 NOV 15 PY 1994 VL 76 IS 10 BP 5706 EP 5718 DI 10.1063/1.357078 PN 1 PG 13 WC Physics, Applied SC Physics GA PT846 UT WOS:A1994PT84600013 ER PT J AU JILES, DC AF JILES, DC TI FREQUENCY-DEPENDENCE OF HYSTERESIS CURVES IN CONDUCTING MAGNETIC-MATERIALS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FERROMAGNETIC HYSTERESIS; PARAMETERS; LOSSES RP JILES, DC (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 16 TC 59 Z9 68 U1 0 U2 20 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 NOV 15 PY 1994 VL 76 IS 10 BP 5849 EP 5855 DI 10.1063/1.358399 PN 1 PG 7 WC Physics, Applied SC Physics GA PT846 UT WOS:A1994PT84600036 ER PT J AU JOHNSTON, GP TIWARI, P REJ, DJ DAVIS, HA WAGANAAR, WJ MUENCHAUSEN, RE WALTER, KC NASTASI, M SCHMIDT, HK KUMAR, N LIN, BY TALLANT, DR SIMPSON, RL WILLIAMS, DB QIU, XM AF JOHNSTON, GP TIWARI, P REJ, DJ DAVIS, HA WAGANAAR, WJ MUENCHAUSEN, RE WALTER, KC NASTASI, M SCHMIDT, HK KUMAR, N LIN, BY TALLANT, DR SIMPSON, RL WILLIAMS, DB QIU, XM TI PREPARATION OF DIAMOND-LIKE CARBON-FILMS BY HIGH-INTENSITY PULSED-ION-BEAM DEPOSITION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ENERGY-LOSS SPECTROSCOPY; LASER DEPOSITION; VAPOR-DEPOSITION; THIN-FILMS; ELECTRON; DAMAGE C1 SI DIAMOND TECHNOL INC,HOUSTON,TX 77098. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. LEHIGH UNIV,DEPT MAT SCI & ENGN,BETHLEHEM,PA 18015. UNIV NEW MEXICO,CTR MICROENGINEERED CERAM,ALBUQUERQUE,NM 87131. UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131. RP JOHNSTON, GP (reprint author), LOS ALAMOS NATL LAB,MS-E526,LOS ALAMOS,NM 87545, USA. NR 35 TC 43 Z9 45 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 NOV 15 PY 1994 VL 76 IS 10 BP 5949 EP 5954 DI 10.1063/1.358373 PN 1 PG 6 WC Physics, Applied SC Physics GA PT846 UT WOS:A1994PT84600052 ER PT J AU MELAMUD, M BENNETT, LH WATSON, RE AF MELAMUD, M BENNETT, LH WATSON, RE TI EFFECT OF NITROGEN ON THE PROPERTIES OF HARD MAGNETS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID EARTH IRON NITRIDES; RARE-EARTH; INTERMETALLIC COMPOUNDS; DISCLINATIONS; ANISOTROPIES; MOMENT; METAL; FE C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. NUCL RES CTR NEGEV, IL-84190 BEER SHEVA, ISRAEL. RP NIST, GAITHERSBURG, MD 20899 USA. NR 26 TC 4 Z9 4 U1 1 U2 3 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 NOV 15 PY 1994 VL 76 IS 10 BP 6044 EP 6046 DI 10.1063/1.358360 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800005 ER PT J AU MOVSHOVICH, R LACERDA, A CANFIELD, PC THOMPSON, JD FISK, Z AF MOVSHOVICH, R LACERDA, A CANFIELD, PC THOMPSON, JD FISK, Z TI LOW-TEMPERATURE PHASE-DIAGRAM OF YBBIPT SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC RP MOVSHOVICH, R (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Canfield, Paul/H-2698-2014 NR 15 TC 3 Z9 3 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 NOV 15 PY 1994 VL 76 IS 10 BP 6121 EP 6123 DI 10.1063/1.358326 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800033 ER PT J AU OSBORN, R GOREMYCHKIN, EA AF OSBORN, R GOREMYCHKIN, EA TI QUADRUPOLAR EFFECTS IN PRCU2SI2 SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID FERMI-LIQUID BEHAVIOR; CECU2SI2 C1 RUTHERFORD APPLETON LAB,ISIS SCI DIV,DIDCOT OX11 0QX,OXON,ENGLAND. RP OSBORN, R (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Osborn, Raymond/E-8676-2011 OI Osborn, Raymond/0000-0001-9565-3140 NR 11 TC 6 Z9 6 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6124 EP 6126 DI 10.1063/1.358327 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800034 ER PT J AU SANCHEZCASTRO, C COOPER, BR BEDELL, KS AF SANCHEZCASTRO, C COOPER, BR BEDELL, KS TI CONSEQUENCES OF COMPETING HYBRIDIZATION FOR MAGNETIC-ORDERING IN CORRELATED-ELECTRON LATTICES SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC C1 W VIRGINIA UNIV,DEPT PHYS,MORGANTOWN,WV 26506. RP SANCHEZCASTRO, C (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 9 TC 1 Z9 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6130 EP 6132 DI 10.1063/1.358329 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800036 ER PT J AU ISAACS, ED ZSCHACK, P RAMIREZ, AP OGLESBY, CS BUCHER, E AF ISAACS, ED ZSCHACK, P RAMIREZ, AP OGLESBY, CS BUCHER, E TI ANTIFERROMAGNETIC ORDER IN SUPERCONDUCTING UPT3 - AN X-RAY MAGNETIC SCATTERING STUDY SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID ANISOTROPY; PRESSURE; URU2SI2 C1 BROOKHAVEN NATL LAB,OAK RIDGE INST SCI & EDUC,UPTON,NY 11973. UNIV CONSTANCE,W-7750 CONSTANCE,GERMANY. RP ISAACS, ED (reprint author), AT&T BELL LABS,600 MT AVE,MURRAY HILL,NJ 07974, USA. NR 22 TC 1 Z9 1 U1 0 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 NOV 15 PY 1994 VL 76 IS 10 BP 6133 EP 6136 DI 10.1063/1.358330 PN 2 PG 4 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800037 ER PT J AU HAVELA, L SECHOVSKY, V SVOBODA, P DIVIS, M NAKOTTE, H PROKES, K DEBOER, FR PURWANTO, A ROBINSON, RA SERET, A WINAND, JM REBIZANT, J SPIRLET, JC RICHTER, M ESCHRIG, H AF HAVELA, L SECHOVSKY, V SVOBODA, P DIVIS, M NAKOTTE, H PROKES, K DEBOER, FR PURWANTO, A ROBINSON, RA SERET, A WINAND, JM REBIZANT, J SPIRLET, JC RICHTER, M ESCHRIG, H TI HEAVY-FERMION BEHAVIOR OF U(2)T(2)X COMPOUNDS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC C1 UNIV AMSTERDAM,VAN DER WAALS ZEEMAN LAB,1018 XE AMSTERDAM,NETHERLANDS. LOS ALAMOS NATL LAB,LANSCE,LOS ALAMOS,NM 87545. COMMISS EUROPEAN COMMUNITIES,JOINT RES CTR,INST TRANSURANIUM ELEMENTS,D-76125 KARLSRUHE,GERMANY. TECH UNIV DRESDEN,MGP RES GRP ELECTRON SYST,D-01062 DRESDEN,GERMANY. RP HAVELA, L (reprint author), CHARLES UNIV,DEPT MET PHYS,KE KARLOVU 5,CR-12116 PRAGUE 2,CZECH REPUBLIC. RI Sechovsky, Vladimir/A-5256-2008; Richter, Manuel/F-2485-2016 OI Sechovsky, Vladimir/0000-0003-1298-2120; Richter, Manuel/0000-0002-9999-8290 NR 6 TC 40 Z9 40 U1 2 U2 9 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 NOV 15 PY 1994 VL 76 IS 10 BP 6214 EP 6216 DI 10.1063/1.358314 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800062 ER PT J AU SECHOVSKY, V HAVELA, L SVOBODA, P PURWANTO, A LARSON, AC ROBINSON, RA PROKES, K NAKOTTE, H DEBOER, FR MALETTA, H AF SECHOVSKY, V HAVELA, L SVOBODA, P PURWANTO, A LARSON, AC ROBINSON, RA PROKES, K NAKOTTE, H DEBOER, FR MALETTA, H TI INCOMMENSURATE ANTIFERROMAGNETIC PHASE IN UNIGE SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC C1 LOS ALAMOS NATL LAB,LANSCE,LOS ALAMOS,NM 87545. UNIV AMSTERDAM,VAN DER WAALS ZEEMAN LAB,1018 XE AMSTERDAM,NETHERLANDS. HAHN MEITNER INST BERLIN GMBH,BENSC,D-14109 BERLIN,GERMANY. RP SECHOVSKY, V (reprint author), CHARLES UNIV,DEPT MET PHYS,KE KARLOVU 5,CR-12116 PRAGUE,CZECH REPUBLIC. RI Sechovsky, Vladimir/A-5256-2008 OI Sechovsky, Vladimir/0000-0003-1298-2120 NR 11 TC 4 Z9 4 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6217 EP 6219 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800063 ER PT J AU LEWIS, LH ZHU, Y WELCH, DO AF LEWIS, LH ZHU, Y WELCH, DO TI EVIDENCE FOR REVERSAL BY NUCLEATION IN RE-FE-B DIE-UPSET MAGNETS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID BORON PERMANENT-MAGNETS; STRONG PINNING MODEL; COERCIVITY; MICROSTRUCTURE; MECHANISM RP LEWIS, LH (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 23 TC 17 Z9 17 U1 1 U2 8 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 NOV 15 PY 1994 VL 76 IS 10 BP 6235 EP 6237 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800069 ER PT J AU FITZSIMMONS, MR ROLL, A BURKEL, E SIKAFUS, KE NASTASI, MA SMITH, GS PYNN, R AF FITZSIMMONS, MR ROLL, A BURKEL, E SIKAFUS, KE NASTASI, MA SMITH, GS PYNN, R TI THE MAGNETIZATION DENSITY PROFILE OF A GRAIN-BOUNDARY IN NICKEL SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID X-RAY-DIFFRACTION; ATOMIC-STRUCTURE; TWIST BOUNDARY; ANTIFERROMAGNETISM; GOLD C1 UNIV MUNICH,SEKT PHYS,MUNICH,GERMANY. UNIV ERLANGEN NURNBERG,ERLANGEN,GERMANY. RP FITZSIMMONS, MR (reprint author), LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545, USA. RI Lujan Center, LANL/G-4896-2012 NR 28 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 6295 EP 6300 DI 10.1063/1.358316 PN 2 PG 6 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800091 ER PT J AU ALKANANI, HJ BOOTH, JG CABLE, JW FERNANDEZBACA, JA AF ALKANANI, HJ BOOTH, JG CABLE, JW FERNANDEZBACA, JA TI MAGNETIC TRANSITIONS AT HIGH FIELDS IN (FE,MN)(3)SI ALLOYS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP ALKANANI, HJ (reprint author), UNIV SALFORD,JOULE PHYS LAB,SALFORD M5 4WT,LANCS,ENGLAND. RI Fernandez-Baca, Jaime/C-3984-2014 OI Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 3 TC 2 Z9 2 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 NOV 15 PY 1994 VL 76 IS 10 BP 6359 EP 6361 DI 10.1063/1.358266 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800111 ER PT J AU BADER, SD LI, DQ QIU, ZQ AF BADER, SD LI, DQ QIU, ZQ TI MAGNETIC AND STRUCTURAL INSTABILITIES OF ULTRATHIN FE(100) WEDGES (INVITED) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID THIN FERROMAGNETIC-FILMS; STRIPE DOMAIN-STRUCTURES; INPLANE MAGNETIZATION; INTERFACE ANISOTROPY; FE FILMS; SURFACE; TRANSITION; CU(100); SUPERLATTICES; TEMPERATURE C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP BADER, SD (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Qiu, Zi Qiang/O-4421-2016 OI Qiu, Zi Qiang/0000-0003-0680-0714 NR 48 TC 32 Z9 32 U1 0 U2 2 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 NOV 15 PY 1994 VL 76 IS 10 BP 6419 EP 6424 DI 10.1063/1.358283 PN 2 PG 6 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800126 ER PT J AU LI, DQ FREITAG, M PEARSON, J QIU, ZQ BADER, SD AF LI, DQ FREITAG, M PEARSON, J QIU, ZQ BADER, SD TI MAGNETIC AND STRUCTURAL INSTABILITIES OF FERROMAGNETIC AND ANTIFERROMAGNETIC FE/CU(100) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID FE FILMS; FCC-FE; ADSORBED GASES; EPITAXIAL FE; CU(100); GROWTH; IRON; BCC C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP LI, DQ (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Qiu, Zi Qiang/O-4421-2016 OI Qiu, Zi Qiang/0000-0003-0680-0714 NR 19 TC 37 Z9 37 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6425 EP 6427 DI 10.1063/1.358284 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800127 ER PT J AU ADENWALLA, S PARK, YS FELCHER, GP TEITELMAN, M AF ADENWALLA, S PARK, YS FELCHER, GP TEITELMAN, M TI MAGNETIC RESPONSE OF ULTRATHIN FE ON MGO - A POLARIZED NEUTRON REFLECTOMETRY STUDY SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID FILMS C1 RUSSIAN ACAD SCI,NIZHNII NOVGOROD,RUSSIA. RP ADENWALLA, S (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Park, Yongsup/B-6387-2009 NR 10 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 6443 EP 6445 DI 10.1063/1.358534 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800133 ER PT J AU ZHANG, F THEVUTHASAN, S SCALETTAR, RT SINGH, RRP FADLEY, CS AF ZHANG, F THEVUTHASAN, S SCALETTAR, RT SINGH, RRP FADLEY, CS TI A MONTE-CARLO STUDY OF THE TEMPERATURE-DEPENDENCE OF MAGNETIC ORDER ON FERROMAGNETIC AND ANTIFERROMAGNETIC SURFACES - IMPLICATIONS FOR SPIN-POLARIZED PHOTOELECTRON DIFFRACTION (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP ZHANG, F (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 2 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 NOV 15 PY 1994 VL 76 IS 10 BP 6452 EP 6452 DI 10.1063/1.358222 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800137 ER PT J AU TOBIN, JG WADDILL, GD GUO, X TONG, SY AF TOBIN, JG WADDILL, GD GUO, X TONG, SY TI SPIN-SPECIFIC PHOTOELECTRON DIFFRACTION USING MAGNETIC-X-RAY CIRCULAR-DICHROISM SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID CORE-LEVEL PHOTOEMISSION; QUANTUM-WELL STATES; GIANT MAGNETORESISTANCE; THIN-FILMS; MULTILAYERS; ABSORPTION; FE/CU(001); METAL; POLARIZATION; SCATTERING C1 UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53201. UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53201. RP TOBIN, JG (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550, USA. RI Tobin, James/O-6953-2015 NR 39 TC 1 Z9 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6465 EP 6467 DI 10.1063/1.358225 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800141 ER PT J AU KONIG, H WANG, XD HARMON, BN CARRA, P AF KONIG, H WANG, XD HARMON, BN CARRA, P TI CIRCULAR MAGNETIC-X-RAY DICHROISM FOR RARE-EARTHS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID ABSORPTION; METAL C1 EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE. RP KONIG, H (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 15 TC 10 Z9 10 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6474 EP 6476 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800144 ER PT J AU KADUWELA, AP XIAO, H THEVUTHASAN, S WESTPHAL, C VANHOVE, MA FADLEY, CS AF KADUWELA, AP XIAO, H THEVUTHASAN, S WESTPHAL, C VANHOVE, MA FADLEY, CS TI CIRCULAR-DICHROISM IN CORE-LEVEL PHOTOEMISSION FROM NONMAGNETIC AND MAGNETIC SYSTEMS - A PHOTOELECTRON DIFFRACTION VIEWPOINT (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract C1 UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA. PACIFIC NW LAB, RICHLAND, WA 99532 USA. RP KADUWELA, AP (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 3 TC 0 Z9 0 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6477 EP 6477 DI 10.1063/1.358229 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800145 ER PT J AU FALICOV, LM HOOD, RQ AF FALICOV, LM HOOD, RQ TI THEORY OF THE NEGATIVE MAGNETORESISTANCE OF FERROMAGNETIC-NORMAL METALLIC MULTILAYERS (INVITED) SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID LAYERED MAGNETIC-STRUCTURES; CR-FE SANDWICHES; GIANT MAGNETORESISTANCE; ENHANCED MAGNETORESISTANCE; INTERLAYER EXCHANGE; FE/CR SUPERLATTICES; MAGNETOTRANSPORT; SCATTERING C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP FALICOV, LM (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 33 TC 12 Z9 14 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 NOV 15 PY 1994 VL 76 IS 10 BP 6595 EP 6600 DI 10.1063/1.358205 PN 2 PG 6 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800190 ER PT J AU FARROW, RFC MARKS, RF CEBOLLADA, A TONEY, MF DOBBERTIN, D BEYERS, R PARKIN, SSP RABEDEAU, TA AF FARROW, RFC MARKS, RF CEBOLLADA, A TONEY, MF DOBBERTIN, D BEYERS, R PARKIN, SSP RABEDEAU, TA TI GIANT MAGNETORESISTANCE AT LOW FIELDS IN [(NIXFE1-X)(Y)AG-1-Y]/AG MULTILAYERS PREPARED BY MOLECULAR-BEAM EPITAXY (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract C1 STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. RP FARROW, RFC (reprint author), IBM CORP,ALMADEN RES CTR,DIV RES,650 HARRY RD,SAN JOSE,CA 95120, USA. RI Parkin, Stuart/D-2521-2012 NR 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6618 EP 6618 DI 10.1063/1.358181 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800200 ER PT J AU ANTROPOV, VP HARMON, BN LIECHTENSTEIN, AI AF ANTROPOV, VP HARMON, BN LIECHTENSTEIN, AI TI ORBITAL ORDERING AND MAGNETOOPTICAL EFFECTS IN CESB SO JOURNAL OF APPLIED PHYSICS LA English DT Article C1 MAX PLANCK INST FESTKORPERFORSCH, D-70506 STUTTGART, GERMANY. RP IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. RI Lichtenstein, Alexander/K-8730-2012 OI Lichtenstein, Alexander/0000-0003-0152-7122 NR 22 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. 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PD NOV 15 PY 1994 VL 76 IS 10 BP 6784 EP 6787 DI 10.1063/1.358128 PN 2 PG 4 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800247 ER PT J AU NICHOLSON, DMC BUTLER, WH ZHANG, XG MACLAREN, JM GURNEY, BA SPERIOSU, VS AF NICHOLSON, DMC BUTLER, WH ZHANG, XG MACLAREN, JM GURNEY, BA SPERIOSU, VS TI MAGNETIC-STRUCTURE OF THE SPIN-VALVE INTERFACE SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID GIANT-MAGNETORESISTANCE; MULTILAYERS; SCATTERING C1 TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118. IBM CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. RP NICHOLSON, DMC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 15 TC 26 Z9 26 U1 0 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 NOV 15 PY 1994 VL 76 IS 10 BP 6805 EP 6807 DI 10.1063/1.358135 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800255 ER PT J AU BUTLER, WH ZHANG, XG NICHOLSON, DMC MACLAREN, JM AF BUTLER, WH ZHANG, XG NICHOLSON, DMC MACLAREN, JM TI THEORY OF TRANSPORT IN INHOMOGENEOUS SYSTEMS AND APPLICATION TO MAGNETIC MULTILAYER SYSTEMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID MAGNETORESISTANCE; CONDUCTIVITY C1 TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118. RP BUTLER, WH (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 14 TC 30 Z9 30 U1 0 U2 1 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 NOV 15 PY 1994 VL 76 IS 10 BP 6808 EP 6810 DI 10.1063/1.358136 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800256 ER PT J AU JILES, DC DEVINE, MK AF JILES, DC DEVINE, MK TI RECENT DEVELOPMENTS IN MODELING OF THE STRESS DERIVATIVE OF MAGNETIZATION IN FERROMAGNETIC MATERIALS SO JOURNAL OF APPLIED PHYSICS LA English DT Article; Proceedings Paper CT 6th Joint Magnetism and Magnetic Materials-Intermag Conference CY JUN 20-23, 1994 CL ALBUQUERQUE, NM SP AMER INST PHYS, IEEE, MAGNET SOC, MINERALS MET & MAT SOC, AMER SOC TESTING & MAT, USN, OFF NAVAL RES, AMER CERAM SOC ID HYSTERESIS RP JILES, DC (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. 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Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 7049 EP 7051 DI 10.1063/1.358024 PN 2 PG 3 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800341 ER PT J AU LACERDA, A GRAF, T SARRAO, JL HUNDLEY, MF MANDRUS, D THOMPSON, JD FISK, Z AF LACERDA, A GRAF, T SARRAO, JL HUNDLEY, MF MANDRUS, D THOMPSON, JD FISK, Z TI MAGNETIC-FIELD DEPENDENCE OF T-C OF EUB6 (ABSTRACT) SO JOURNAL OF APPLIED PHYSICS LA English DT Meeting Abstract RP LACERDA, A (reprint author), LOS ALAMOS NATL LAB,NATL HIGH MAGNET FIELD LAB,PULSED FACIL,MAIL STOP E536,LOS ALAMOS,NM 87545, USA. RI Mandrus, David/H-3090-2014 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 15 PY 1994 VL 76 IS 10 BP 7052 EP 7052 DI 10.1063/1.358025 PN 2 PG 1 WC Physics, Applied SC Physics GA PT848 UT WOS:A1994PT84800342 ER PT J AU LIU, GK CARNALL, WT JURSICH, G WILLIAMS, CW AF LIU, GK CARNALL, WT JURSICH, G WILLIAMS, CW TI ANALYSIS OF THE CRYSTAL-FIELD SPECTRA OF THE ACTINIDE TETRAFLUORIDES .2. AMF4, CMF4, CM4+CEF4, AND BK4+CEF4 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SYSTEMATIC ANALYSIS; SINGLE-CRYSTAL; CONFIGURATIONS; CEF4; IONS RP LIU, GK (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 30 TC 17 Z9 17 U1 1 U2 3 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 NOV 15 PY 1994 VL 101 IS 10 BP 8277 EP 8289 DI 10.1063/1.468093 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PR236 UT WOS:A1994PR23600001 ER PT J AU PRATT, ST AF PRATT, ST TI ZERO KINETIC-ENERGY, PULSED-FIELD IONIZATION SPECTROSCOPY OF HYDROGEN IODIDE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ENHANCED MULTIPHOTON IONIZATION; SPIN-ORBIT AUTOIONIZATION; HIGH RYDBERG STATES; THRESHOLD PHOTOIONIZATION SPECTRUM; EXTREME-ULTRAVIOLET-RADIATION; HUND CASE E; PHOTOELECTRON-SPECTROSCOPY; HIGH-RESOLUTION; VACUUM ULTRAVIOLET; AROMATIC-MOLECULES RP PRATT, ST (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 65 TC 17 Z9 17 U1 0 U2 1 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. 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RI Parker, Gregory/A-4327-2009 OI Parker, Gregory/0000-0002-0225-8887 NR 1 TC 2 Z9 2 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 NOV 15 PY 1994 VL 101 IS 10 BP 9203 EP 9203 DI 10.1063/1.468508 PG 1 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PR236 UT WOS:A1994PR23600094 ER PT J AU RAWERS, JC ALMAN, DE LEWANDOWSKI, A PETTY, AV PITTS, J AF RAWERS, JC ALMAN, DE LEWANDOWSKI, A PETTY, AV PITTS, J TI ADDITION OF A NICKEL ALUMINIDE COATING TO INCONEL 600 USING A SOLAR FURNACE SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article RP RAWERS, JC (reprint author), US BUR MINES,ALBANY RES CTR,1450 QUEEN AVE SW,ALBANY,OR 97321, USA. NR 7 TC 4 Z9 4 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 NOV 15 PY 1994 VL 13 IS 22 BP 1608 EP 1611 DI 10.1007/BF00704516 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA PU799 UT WOS:A1994PU79900004 ER PT J AU DAVISON, ME WINTHER, RC AF DAVISON, ME WINTHER, RC TI A GENERAL-APPROACH TO SPLITTING AND INVARIANT IMBEDDING FOR LINEAR WAVE-EQUATIONS SO JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS LA English DT Article C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MATH,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 11 TC 5 Z9 5 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 0022-247X J9 J MATH ANAL APPL JI J. Math. Anal. Appl. PD NOV 15 PY 1994 VL 188 IS 1 BP 158 EP 181 DI 10.1006/jmaa.1994.1419 PG 24 WC Mathematics, Applied; Mathematics SC Mathematics GA PU296 UT WOS:A1994PU29600012 ER PT J AU CHIN, HNS AF CHIN, HNS TI THE IMPACT OF THE ICE PHASE AND RADIATION ON A MIDLATITUDE SQUALL LINE SYSTEM SO JOURNAL OF THE ATMOSPHERIC SCIENCES LA English DT Article ID MESOSCALE CONVECTIVE SYSTEM; GENERAL-CIRCULATION MODEL; TWO-DIMENSIONAL MODEL; NUMERICAL-SIMULATION; CIRRUS CLOUDS; STRATIFORM PRECIPITATION; LONGWAVE RADIATION; MOISTURE BUDGETS; WATER-BUDGET; REAR INFLOW AB A two-dimensional cloud model is used to study the interrelationships among cloud microphysics, radiation, and dynamics in a midlatitude broken-line squall system. The impact of the ice phase, longwave and shortwave radiation on the dynamic and microphysical structures of this multicellular storm, the thermodynamic properties of the cloud ensemble, and their cloud-radiative feedback to the modeled squall line system is investigated in detail. In addition, partitioned heat, moisture, and water budgets are used to assess quantitatively the role of anvil clouds on the modeled squall line system. The major conclusions are as follows. 1) Both ice phase and radiation have little influence on the multicellular characters of the modeled squall line system. However, the ice phase and longwave radiation significantly impact the mesoscale structure and lead to a more realistic feature having an evident transition zone between the bright melting band and the convective region in the model-derived radar reflectivity. 2) The development of rear inflow in the modeled squall line system is attributed to the upshear tilt of the convective system. The intensity of rear inflow is also modulated by the ice phase and radiation. This rear inflow is found to play an important role in the cloud-radiative feedback to the modeled squall line system. 3) For this type of squall line system, the ice phase and radiation do not considerably change the heating and drying profiles of the cloud ensemble (10% similar to 20% difference in the maximum heating and drying). Due to the dominance of convective clouds, the contributions of stratiform clouds to the total heat and moisture budgets of the cloud ensemble account for only a relatively small portion (10% and 20% similar to 30% for the maximum heat and moisture budgets, respectively). 4) Horizontal transport of hydrometeors from deep convection is the primary source (similar to 2/3) of the water budget for anvil clouds in ice simulations; the rest (similar to 1/3) is contributed by the mesoscale lifting associated with the tilting convective system. 5) Longwave optical properties of anvils are insensitive to the ice phase. However, the ice phase can significantly impact shortwave optical properties of anvils. In contrast to the destabilization of longwave radiation, shortwave radiation acts to stabilize the stratiform and convective clouds. 6) Model simulations imply that the feedback of anvil clouds to the large-scale system is most likely dominated by radiative processes. Owing to the large coverage of convectively generated anvil clouds, the present study suggests that the missing physics of cumulus-anvil interactions in general circulation models may result in an underestimated cloud albedo and an overestimated surface insolation. C1 LAWRENCE LIVERMORE NATL LAB, DIV REG ATMOSPHER SCI, LIVERMORE, CA USA. NR 69 TC 27 Z9 29 U1 0 U2 1 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0022-4928 J9 J ATMOS SCI JI J. Atmos. Sci. PD NOV 15 PY 1994 VL 51 IS 22 BP 3320 EP 3343 DI 10.1175/1520-0469(1994)051<3320:TIOTIP>2.0.CO;2 PG 24 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA PT243 UT WOS:A1994PT24300008 ER PT J AU HUNDLE, B ALBERTI, M NIEVELSTEIN, V BEYER, P KLEINIG, H ARMSTRONG, GA BURKE, DH HEARST, JE AF HUNDLE, B ALBERTI, M NIEVELSTEIN, V BEYER, P KLEINIG, H ARMSTRONG, GA BURKE, DH HEARST, JE TI FUNCTIONAL ASSIGNMENT OF ERWINIA-HERBICOLA EHO10 CAROTENOID GENES EXPRESSED IN ESCHERICHIA-COLI SO MOLECULAR & GENERAL GENETICS LA English DT Article DE CAROTENOID GENES; ERWINIA HERBICOLA; FUMARATE BINDING DOMAIN; MELIBIOSE CARRIER PROTEIN; CYSTATHIONE GAMMA-SYNTHASE ID PIGMENT GENES; BIOSYNTHESIS; PRODUCTS; PROKARYOTES; SEQUENCE; CLUSTER; CLONING AB Erwinia herbicola is a nonphotosynthetic bacterium that is yellow pigmented due to the presence of carotenoids. When the Erwinia carotenoid biosynthetic genes are expressed in Escherichia coli, this bacterium also displays a yellow phenotype. The DNA sequence of the plasmid pPL376, carrying the entire Erwinia carotenoid gene cluster, has been found to contain 12 open reading frames (ORFs). Six of the ORFs have been identified as carotenoid biosynthesis genes that code for all the enzymes required for conversion of farnesyl pyrophosphate (FPP) to zeaxanthin diglucoside via geranylgeranyl pyrophosphate, phytoene, lycopene, beta-carotene, and zeaxanthin. These enzymatic steps were assigned after disruption of each ORF by a specific mutation and analysis of the accumulated intermediates. Carotenoid intermediates were identified by the absorption spectra of the colored components and by high pressure liquid chromatographic analysis. The six carotenoid genes are arranged in at least two operons. The gene coding for beta-carotene hydroxylase is transcribed in the opposite direction from that of the other carotenoid genes and overlaps with the gene for phytoene synthase. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV STRUCT BIOL,BERKELEY,CA 94720. FU NIEHS NIH HHS [2 T32 ES07075-11] NR 26 TC 56 Z9 65 U1 1 U2 11 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 NOV 15 PY 1994 VL 245 IS 4 BP 406 EP 416 DI 10.1007/BF00302252 PG 11 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA QK743 UT WOS:A1994QK74300002 PM 7808389 ER PT J AU SKINNER, CJ AF SKINNER, CJ TI RED GIANTS WITH UNUSUAL DUST SHELLS .2. THE DUSTY R-STAR HD-100764 SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY LA English DT Article DE CIRCUMSTELLAR MATTER; STARS, GIANT; STARS, INDIVIDUAL, HD 100764; STARS, LATE-TYPE; DUST, EXTINCTION; INFRARED, STARS ID CARBON STARS; SILICATE DUST AB We present an 8-13 mu m spectrum of the unusual, dusty, early R star HD 100764. Contrary to earlier speculation this star does not have silicate dust around it, and is probably not directly linked evolutionarily to the controversial carbon stars with silicate dust features. The mid-IR spectrum, combined with existing optical and IR photometry, is used to model the dust around the star. We find that HD 100764 must have a massive (3 x 10(-5) M.) dust disc containing a distribution of grains ranging from small to very large, and that the observations are inconsistent with a spherical dust shell model. We argue that the most likely interpretation is that the star has acquired its dusty disc from a companion that has already evolved through the AGB and PN phases. C1 LAWRENCE LIVERMORE NATL LAB,EXPTL ASTROPHYS LAB,LIVERMORE,CA 94551. RP SKINNER, CJ (reprint author), LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,L-413,POB 808,LIVERMORE,CA 94551, USA. NR 20 TC 11 Z9 11 U1 0 U2 0 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0035-8711 J9 MON NOT R ASTRON SOC JI Mon. Not. Roy. Astron. Soc. PD NOV 15 PY 1994 VL 271 IS 2 BP 300 EP 304 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PR049 UT WOS:A1994PR04900006 ER PT J AU CHAN, CT DATTA, S YU, QL SIGALAS, M HO, KM SOUKOULIS, CM AF CHAN, CT DATTA, S YU, QL SIGALAS, M HO, KM SOUKOULIS, CM TI NEW STRUCTURES AND ALGORITHMS FOR PHOTONIC BAND-GAPS SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS LA English DT Article ID PERIODIC DIELECTRIC STRUCTURES AB A new class of structure is found to possess photonic band gaps, and it contains most of the previously known photonic band gap structures as its subsets. We will also present some results concerning the EM wave eigenstates of structures with structural defects and the transmission characteristics of periodic materials with one component being dispersive and absorbing. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS & ASTRON, AMES, IA 50011 USA. RP CHAN, CT (reprint author), US DOE, AMES LAB, AMES, IA 50011 USA. RI Soukoulis, Costas/A-5295-2008 NR 15 TC 12 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD NOV 15 PY 1994 VL 211 IS 4 BP 411 EP 419 DI 10.1016/0378-4371(94)00133-2 PG 9 WC Physics, Multidisciplinary SC Physics GA PT643 UT WOS:A1994PT64300006 ER PT J AU SALKOLA, MI KIVELSON, SA AF SALKOLA, MI KIVELSON, SA TI 2-PHASE COEXISTENCE AND SEMIMETALLIC STATES IN CONDUCTING POLYMERS SO PHYSICAL REVIEW B LA English DT Article ID IODINE-DOPED POLYACETYLENE; METAL-NONMETAL TRANSITION; CONJUGATED POLYMERS; ABSORPTION; PEIERLS; MODEL; INSULATOR; SOLITONS; DISORDER; HUBBARD C1 UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP SALKOLA, MI (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 33 TC 11 Z9 11 U1 1 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 NOV 15 PY 1994 VL 50 IS 19 BP 13962 EP 13973 DI 10.1103/PhysRevB.50.13962 PG 12 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700004 ER PT J AU VAREKAMP, PR SIMPSON, WC SHUH, DK DURBIN, TD CHAKARIAN, V YARMOFF, JA AF VAREKAMP, PR SIMPSON, WC SHUH, DK DURBIN, TD CHAKARIAN, V YARMOFF, JA TI ELECTRONIC-STRUCTURE OF GAF3 FILMS GROWN ON GAAS VIA EXPOSURE TO XEF2 SO PHYSICAL REVIEW B LA English DT Article ID CORE-LEVEL PHOTOEMISSION; STIMULATED DESORPTION; THIN-FILMS; INTERFACE; SURFACE; GAAS(110); FLUORINE; ENERGY; LAYER; SUBSTRATE C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP VAREKAMP, PR (reprint author), UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521, USA. NR 45 TC 23 Z9 23 U1 2 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 NOV 15 PY 1994 VL 50 IS 19 BP 14267 EP 14276 DI 10.1103/PhysRevB.50.14267 PG 10 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700038 ER PT J AU LUCAS, CA LORETTO, D WONG, GCL AF LUCAS, CA LORETTO, D WONG, GCL TI EPITAXIAL-GROWTH MECHANISMS AND STRUCTURE OF CAF2/SI(111) SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-DIFFRACTION; TRANSMISSION ELECTRON-MICROSCOPY; SURFACE-STRUCTURE DETERMINATION; SI(111)-CAF2 INTERFACE; SEMICONDUCTOR; RESOLUTION; CAF2; TRANSITION; SCATTERING; INSULATOR C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP LUCAS, CA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. OI Lucas, Christopher/0000-0001-5743-3868 NR 48 TC 46 Z9 46 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 NOV 15 PY 1994 VL 50 IS 19 BP 14340 EP 14353 DI 10.1103/PhysRevB.50.14340 PG 14 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700046 ER PT J AU YEH, CY ZHANG, SB ZUNGER, A AF YEH, CY ZHANG, SB ZUNGER, A TI CONFINEMENT, SURFACE, AND CHEMISORPTION EFFECTS ON THE OPTICAL-PROPERTIES OF SI QUANTUM WIRES SO PHYSICAL REVIEW B LA English DT Article ID VISIBLE-LIGHT EMISSION; ELECTRONIC-STRUCTURE; POROUS SILICON; 1ST-PRINCIPLES; FILMS RP YEH, CY (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Zunger, Alex/A-6733-2013; Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013 OI Zhang, Shengbai/0000-0003-0833-5860 NR 28 TC 106 Z9 107 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 NOV 15 PY 1994 VL 50 IS 19 BP 14405 EP 14415 DI 10.1103/PhysRevB.50.14405 PG 11 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700052 ER PT J AU GERMAN, KAH WEARE, CB YARMOFF, JA AF GERMAN, KAH WEARE, CB YARMOFF, JA TI INNER-SHELL PROMOTIONS IN LOW-ENERGY LI+-AL COLLISIONS AT CLEAN AND ALKALI-COVERED AL(100) SURFACES SO PHYSICAL REVIEW B LA English DT Article ID METASTABLE ADSORPTION SITES; ION-SCATTERING SPECTROSCOPY; INDUCED ELECTRON-EMISSION; POTASSIUM AUGER EMISSION; CHARGE-EXCHANGE; SOLID-SURFACES; HE+ SCATTERING; AUTOIONIZING STATES; METAL ADSORPTION; NEUTRALIZATION C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 61 TC 19 Z9 19 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 NOV 15 PY 1994 VL 50 IS 19 BP 14452 EP 14466 DI 10.1103/PhysRevB.50.14452 PG 15 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700057 ER PT J AU DIEBOLD, U TAO, HS SHINN, ND MADEY, TE AF DIEBOLD, U TAO, HS SHINN, ND MADEY, TE TI ELECTRONIC-STRUCTURE OF ULTRATHIN FE FILMS ON TIO2(110) STUDIED WITH SOFT-X-RAY PHOTOELECTRON-SPECTROSCOPY AND RESONANT PHOTOEMISSION SO PHYSICAL REVIEW B LA English DT Article ID SURFACE REACTIVITY; ION DESORPTION; METAL-FILMS; VALENCE; STATES; TIO2; HYBRIDIZATION; ADSORPTION; DENSITIES; EMISSION C1 RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855. RUTGERS STATE UNIV,SURFACE MODIFICAT LAB,PISCATAWAY,NJ 08855. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP DIEBOLD, U (reprint author), TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118, USA. RI Diebold, Ulrike/A-3681-2010 OI Diebold, Ulrike/0000-0003-0319-5256 NR 35 TC 53 Z9 53 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 NOV 15 PY 1994 VL 50 IS 19 BP 14474 EP 14480 DI 10.1103/PhysRevB.50.14474 PG 7 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700059 ER PT J AU RIFFE, DM KIM, B ERSKINE, JL AF RIFFE, DM KIM, B ERSKINE, JL TI SURFACE CORE-LEVEL SHIFTS AND ATOMIC COORDINATION AT A STEPPED W(110) SURFACE SO PHYSICAL REVIEW B LA English DT Article ID RECONSTRUCTION C1 UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712. SANDIA NATL LABS,DEPT SURFACE & INTERFACE SCI,ALBUQUERQUE,NM 87185. NR 16 TC 17 Z9 17 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 NOV 15 PY 1994 VL 50 IS 19 BP 14481 EP 14488 DI 10.1103/PhysRevB.50.14481 PG 8 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700060 ER PT J AU NICHOLSON, DMC STOCKS, GM WANG, Y SHELTON, WA SZOTEK, Z TEMMERMAN, WM AF NICHOLSON, DMC STOCKS, GM WANG, Y SHELTON, WA SZOTEK, Z TEMMERMAN, WM TI STATIONARY NATURE OF THE DENSITY-FUNCTIONAL FREE-ENERGY - APPLICATION TO ACCELERATED MULTIPLE-SCATTERING CALCULATIONS SO PHYSICAL REVIEW B LA English DT Note C1 SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. RP NICHOLSON, DMC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. RI Stocks, George Malcollm/Q-1251-2016 OI Stocks, George Malcollm/0000-0002-9013-260X NR 10 TC 60 Z9 60 U1 0 U2 7 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 NOV 15 PY 1994 VL 50 IS 19 BP 14686 EP 14689 DI 10.1103/PhysRevB.50.14686 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700100 ER PT J AU AHUJA, R SODERLIND, P TRYGG, J MELSEN, J WILLS, JM JOHANSSON, B ERIKSSON, O AF AHUJA, R SODERLIND, P TRYGG, J MELSEN, J WILLS, JM JOHANSSON, B ERIKSSON, O TI INFLUENCE OF PSEUDOCORE VALENCE-BAND HYBRIDIZATION ON THE CRYSTAL-STRUCTURE PHASE STABILITIES OF TRANSITION-METALS UNDER EXTREME COMPRESSIONS SO PHYSICAL REVIEW B LA English DT Note ID BRILLOUIN-ZONE; SPECIAL POINTS; SYSTEMS C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP AHUJA, R (reprint author), UPPSALA UNIV,DEPT PHYS,CONDENSED MATTER THEORY GRP,BOX 530,UPPSALA,SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 18 TC 20 Z9 20 U1 1 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 NOV 15 PY 1994 VL 50 IS 19 BP 14690 EP 14693 DI 10.1103/PhysRevB.50.14690 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700101 ER PT J AU WARREN, WL FLEETWOOD, DM SHANEYFELT, MR WINOKUR, PS DEVINE, RAB AF WARREN, WL FLEETWOOD, DM SHANEYFELT, MR WINOKUR, PS DEVINE, RAB TI DEFECT-DEFECT HOLE TRANSFER AND THE IDENTITY OF BORDER TRAPS IN SIO2-FILMS SO PHYSICAL REVIEW B LA English DT Note ID OXIDE-SEMICONDUCTOR DEVICES; INTERFACE TRAPS; SI-SIO2 INTERFACE; SILICON DIOXIDE; MOS DEVICES; RADIATION; GENERATION; CENTERS; ELECTRONS; BUILDUP C1 FRANCE TELECOM,CTR NATL ETUD TELECOMMUN,F-38243 MEYLAN,FRANCE. RP WARREN, WL (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 27 TC 9 Z9 9 U1 1 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 NOV 15 PY 1994 VL 50 IS 19 BP 14710 EP 14713 DI 10.1103/PhysRevB.50.14710 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700106 ER PT J AU FERRELL, TL AF FERRELL, TL TI THIN-FOIL SURFACE-PLASMON MODIFICATION IN SCANNING-PROBE MICROSCOPY SO PHYSICAL REVIEW B LA English DT Note ID TUNNELING-MICROSCOPY RP FERRELL, TL (reprint author), OAK RIDGE NATL LAB,DIV HLTH SCI RES,POB 2008,OAK RIDGE,TN 37831, USA. NR 13 TC 14 Z9 14 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 15 PY 1994 VL 50 IS 19 BP 14738 EP 14741 DI 10.1103/PhysRevB.50.14738 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700113 ER PT J AU LI, YG RAEKER, TJ DEPRISTO, AE AF LI, YG RAEKER, TJ DEPRISTO, AE TI STEP-FACILITATED DISSOCIATION OF SMALL METAL-CLUSTERS - A MOLECULAR-DYNAMICS STUDY SO PHYSICAL REVIEW B LA English DT Note ID BY-LAYER GROWTH; SURFACE-DIFFUSION; BODY FORMULATION; SYSTEMS; NUCLEATION; MECHANISMS; AG(111); ATOMS; AG C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 30 TC 9 Z9 10 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 NOV 15 PY 1994 VL 50 IS 19 BP 14742 EP 14745 DI 10.1103/PhysRevB.50.14742 PG 4 WC Physics, Condensed Matter SC Physics GA PV107 UT WOS:A1994PV10700114 ER PT J AU BOWEN, C SUGIYAMA, G ALDER, BJ AF BOWEN, C SUGIYAMA, G ALDER, BJ TI STATIC DIELECTRIC RESPONSE OF THE ELECTRON-GAS SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM MONTE-CARLO; GROUND-STATE; METALLIC DENSITIES; FORMULATION; MOLECULES; LIQUIDS; FERMION C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616. NR 26 TC 40 Z9 40 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 NOV 15 PY 1994 VL 50 IS 20 BP 14838 EP 14848 DI 10.1103/PhysRevB.50.14838 PG 11 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500009 ER PT J AU ALLEN, PB CHETTY, N AF ALLEN, PB CHETTY, N TI TITE2 - INCONSISTENCY BETWEEN TRANSPORT-PROPERTIES AND PHOTOEMISSION RESULTS SO PHYSICAL REVIEW B LA English DT Article ID BAND-STRUCTURE; NORMAL-STATE; FERMI-SURFACE; METALS; RESISTIVITY; SUPERCONDUCTORS; PLANE C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP ALLEN, PB (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 24 TC 17 Z9 17 U1 6 U2 17 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 NOV 15 PY 1994 VL 50 IS 20 BP 14855 EP 14859 DI 10.1103/PhysRevB.50.14855 PG 5 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500011 ER PT J AU HUNT, MB CHERNIKOV, MA FELDER, E OTT, HR FISK, Z CANFIELD, PC AF HUNT, MB CHERNIKOV, MA FELDER, E OTT, HR FISK, Z CANFIELD, PC TI LOW-TEMPERATURE MAGNETIC, THERMAL, AND TRANSPORT-PROPERTIES OF FESI SO PHYSICAL REVIEW B LA English DT Article ID VALENT SMB6; GAP C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP HUNT, MB (reprint author), ETH ZURICH, FESTKORPERPHYS LAB, CH-8093 ZURICH, SWITZERLAND. RI Canfield, Paul/H-2698-2014 NR 24 TC 54 Z9 54 U1 1 U2 9 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 NOV 15 PY 1994 VL 50 IS 20 BP 14933 EP 14941 DI 10.1103/PhysRevB.50.14933 PG 9 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500021 ER PT J AU WRIGHT, AF ATLAS, SR AF WRIGHT, AF ATLAS, SR TI DENSITY-FUNCTIONAL CALCULATIONS FOR GRAIN-BOUNDARIES IN ALUMINUM SO PHYSICAL REVIEW B LA English DT Article ID TRANSMISSION ELECTRON-MICROSCOPY; STACKING-FAULT ENERGIES; CHARGE-DENSITIES; PLANAR DEFECTS; TWIN-BOUNDARY; METALS; ABINITIO; SYSTEMS C1 THINKING MACHINES CORP, CAMBRIDGE, MA 02142 USA. RP SANDIA NATL LABS, MS 0350, ALBUQUERQUE, NM 87185 USA. NR 39 TC 47 Z9 47 U1 1 U2 8 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 NOV 15 PY 1994 VL 50 IS 20 BP 15248 EP 15260 DI 10.1103/PhysRevB.50.15248 PG 13 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500060 ER PT J AU BROOKES, NB CHANG, Y JOHNSON, PD AF BROOKES, NB CHANG, Y JOHNSON, PD TI AG/FE(001) INTERFACE SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM-WELL STATES; SPIN POLARIZATION ANALYZER; SURFACE-STATES; MAGNETIC SUPERLATTICES; ELECTRONIC-STRUCTURE; ENERGY; SUBSTRATE; FE(100); METALS; LAYERS C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. NR 29 TC 16 Z9 16 U1 0 U2 9 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 NOV 15 PY 1994 VL 50 IS 20 BP 15330 EP 15336 DI 10.1103/PhysRevB.50.15330 PG 7 WC Physics, Condensed Matter SC Physics GA PV865 UT WOS:A1994PV86500067 ER PT J AU HABIB, S HOLZ, DE KHEYFETS, A MATZNER, RA MILLER, WA TOLMAN, BW AF HABIB, S HOLZ, DE KHEYFETS, A MATZNER, RA MILLER, WA TOLMAN, BW TI DYNAMICS OF THE LAGEOS SATELLITE IN SUPPORT OF A MEASUREMENT OF THE EARTHS GRAVITOMAGNETISM SO PHYSICAL REVIEW D LA English DT Article ID DRAG C1 UNIV CHICAGO,ENRICO FERMI INST,DEPT PHYS,CHICAGO,IL 60637. N CAROLINA STATE UNIV,DEPT MATH,RALEIGH,NC 27695. UNIV TEXAS,CTR RELAT,AUSTIN,TX 78712. UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712. UNIV TEXAS,APPL RES LABS,AUSTIN,TX 78713. USAF,PHILLIPS LAB AFMC,ASTRODYNAM BRANCH PLVTA,KIRTLAND AFB,NM 87117. RP HABIB, S (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,THEORET ASTROPHYS GRP T6MSB288,LOS ALAMOS,NM 87545, USA. NR 24 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 15 PY 1994 VL 50 IS 10 BP 6068 EP 6079 DI 10.1103/PhysRevD.50.6068 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PU841 UT WOS:A1994PU84100009 ER PT J AU GYUK, G TURNER, MS AF GYUK, G TURNER, MS TI RELAXING THE BIG-BANG BOUND TO THE BARYON DENSITY SO PHYSICAL REVIEW D LA English DT Article ID COLD DARK-MATTER; MINIMAL ISOCURVATURE MODEL; PECULIAR VELOCITY-FIELD; TAU-NEUTRINO MASS; PRIMORDIAL NUCLEOSYNTHESIS; IRAS-GALAXIES; UNIVERSE; COSMOLOGY C1 FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP GYUK, G (reprint author), UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637, USA. NR 37 TC 15 Z9 15 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 NOV 15 PY 1994 VL 50 IS 10 BP 6130 EP 6134 DI 10.1103/PhysRevD.50.6130 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PU841 UT WOS:A1994PU84100016 ER PT J AU WANG, Y AF WANG, Y TI POLYNOMIAL HYBRID INFLATION SO PHYSICAL REVIEW D LA English DT Article ID LARGE-SCALE STRUCTURE; HOT DARK-MATTER; PERTURBATIONS; UNIVERSE; COSMOLOGY; SPECTRA RP WANG, Y (reprint author), FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510, USA. RI Wang, Yun/B-5724-2011 OI Wang, Yun/0000-0002-4749-2984 NR 21 TC 14 Z9 14 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 NOV 15 PY 1994 VL 50 IS 10 BP 6135 EP 6143 DI 10.1103/PhysRevD.50.6135 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PU841 UT WOS:A1994PU84100017 ER PT J AU CHEN, SP AF CHEN, SP TI MODELING OF BRITTLE/BRITTLE LAMINATES - THE EFFECTS OF THE INTERFACIAL COHESION SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID MATRIX COMPOSITES; REINFORCED GLASS; TOUGHNESS RP CHEN, SP (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 21 TC 2 Z9 2 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD NOV 15 PY 1994 VL 31 IS 10 BP 1437 EP 1442 DI 10.1016/0956-716X(94)90132-5 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA PE217 UT WOS:A1994PE21700029 ER PT J AU PENG, G WANG, X RANDALL, CR MOORE, JA CRAMER, SP AF PENG, G WANG, X RANDALL, CR MOORE, JA CRAMER, SP TI SPIN SELECTIVE X-RAY-ABSORPTION SPECTROSCOPY - DEMONSTRATION USING HIGH-RESOLUTION FE-KAPPA-BETA FLUORESCENCE SO APPLIED PHYSICS LETTERS LA English DT Article C1 LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. RP PENG, G (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616, USA. NR 19 TC 48 Z9 48 U1 1 U2 6 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 NOV 14 PY 1994 VL 65 IS 20 BP 2527 EP 2529 DI 10.1063/1.112625 PG 3 WC Physics, Applied SC Physics GA PR046 UT WOS:A1994PR04600010 ER PT J AU ATZMON, Z BAIR, AE JAQUEZ, EJ MAYER, JW CHANDRASEKHAR, D SMITH, DJ HERVIG, RL ROBINSON, M AF ATZMON, Z BAIR, AE JAQUEZ, EJ MAYER, JW CHANDRASEKHAR, D SMITH, DJ HERVIG, RL ROBINSON, M TI CHEMICAL-VAPOR-DEPOSITION OF HETEROEPITAXIAL SI1-X-YGEXCY FILMS ON (100)SI SUBSTRATES SO APPLIED PHYSICS LETTERS LA English DT Article ID HETEROSTRUCTURES; EPITAXY C1 ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287. LAWRENCE SEMICOND RES LAB INC,TEMPE,AZ 85282. RP ATZMON, Z (reprint author), ARIZONA STATE UNIV,DEPT CHEM BIO & MAT ENGN,TEMPE,AZ 85287, USA. NR 7 TC 69 Z9 69 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 NOV 14 PY 1994 VL 65 IS 20 BP 2559 EP 2561 DI 10.1063/1.112635 PG 3 WC Physics, Applied SC Physics GA PR046 UT WOS:A1994PR04600021 ER PT J AU PINNADUWAGE, LA MARTIN, MZ CHRISTOPHOROU, LG AF PINNADUWAGE, LA MARTIN, MZ CHRISTOPHOROU, LG TI ENHANCED NEGATIVE-ION FORMATION IN ULTRAVIOLET-LASER IRRADIATED SILANE - IMPLICATIONS FOR PLASMA DEPOSITION OF AMORPHOUS-SILICON SO APPLIED PHYSICS LETTERS LA English DT Article ID ATTACHMENT; DISCHARGES; IONIZATION; DENSITY C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP PINNADUWAGE, LA (reprint author), OAK RIDGE NATL LAB,ATOM MOLEC & HIGH VOLTAGE PHYS GRP,OAK RIDGE,TN 37831, USA. RI Martin, Madhavi/A-5268-2011; OI Martin, Madhavi/0000-0002-6677-2180 NR 15 TC 11 Z9 11 U1 1 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 NOV 14 PY 1994 VL 65 IS 20 BP 2571 EP 2573 DI 10.1063/1.112642 PG 3 WC Physics, Applied SC Physics GA PR046 UT WOS:A1994PR04600025 ER PT J AU MCCARTNEY, MR SMITH, DJ HULL, R BEAN, JC VOELKL, E FROST, B AF MCCARTNEY, MR SMITH, DJ HULL, R BEAN, JC VOELKL, E FROST, B TI DIRECT OBSERVATION OF POTENTIAL DISTRIBUTION ACROSS SI-SI P-N-JUNCTIONS USING OFF-AXIS ELECTRON HOLOGRAPHY SO APPLIED PHYSICS LETTERS LA English DT Article C1 ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. AT&T BELL LABS,MURRAY HILL,NJ 07974. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP MCCARTNEY, MR (reprint author), ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287, USA. NR 14 TC 84 Z9 86 U1 1 U2 8 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 NOV 14 PY 1994 VL 65 IS 20 BP 2603 EP 2605 DI 10.1063/1.112581 PG 3 WC Physics, Applied SC Physics GA PR046 UT WOS:A1994PR04600036 ER PT J AU AMUSIA, MY AVDONINA, NB PRATT, RH AF AMUSIA, MY AVDONINA, NB PRATT, RH TI COHERENT CORRELATION ENHANCEMENT OF OUTER SHELL PHOTOIONIZATION CROSS-SECTIONS OF ALKALI-LIKE IONS SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID GROUND-STATE; PHOTOABSORPTION; CESIUM; ATOMS AB An alkali-like ion interaction with inner electrons of an alkali-like ion leads to a significant increase in the photoionization cross section of the outer s electron. This occurs not only for ground state ions with one s electron in the outer shell, but also when the outer s electron is in an excited state. The reason for this amplification, in addition to coherent enhancement in summing of the correlation amplitudes, is that the zero in the direct amplitude occurs below threshold. This leads to a constructive interference with the correlation amplitude above the photoionization threshold, in contrast to a destructive interference in the case of a neutral atom with the same electronic configuration, for which the zero occurs above threshold. C1 UNIV PITTSBURGH,DEPT PHYS & ASTRON,PITTSBURGH,PA 15260. AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA. RP AMUSIA, MY (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. RI Amusia, Miron/K-7726-2014 NR 23 TC 0 Z9 0 U1 0 U2 0 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 NOV 14 PY 1994 VL 27 IS 21 BP 5211 EP 5219 DI 10.1088/0953-4075/27/21/014 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA PT060 UT WOS:A1994PT06000014 ER PT J AU TAKAGI, T BOESTEN, L TANAKA, H DILLON, MA AF TAKAGI, T BOESTEN, L TANAKA, H DILLON, MA TI ELASTIC-SCATTERING AND VIBRATIONAL-EXCITATION CROSS-SECTIONS FOR ELECTRON COLLISIONS WITH C2F6 SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID LOW-ENERGY ELECTRONS; SHAPE RESONANCES; BOND LENGTHS; PERFLUOROALKANES; ATTACHMENT; MOLECULES; ORBITALS; HYDROGEN; ETHANE; IMPACT AB Absolute elastic cross sections for e-C2F6 collisions have been measured for impact energies of 2 to 100 eV and scattering angles from 10 to 130 degrees. From these, the integrated and momentum transfer cross sections were obtained by extrapolation and numerical integration. Energy loss spectra were measured for vibrational excitation. The vibrational excitation functions show resonances at 4.3 eV and 8.5 eV. By decomposition of the loss spectra and symmetry analysis according to angular correlation theory, the resonances have been assigned to a temporary trapping of the electrons in the a(2u) (4.3 eV) and e(u) (8.5 eV) antibonding orbitals of the molecule. C1 SOPHIA UNIV, DEPT PHYS, CHIYODA KU, TOKYO 102, JAPAN. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 57 TC 29 Z9 29 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-4075 EI 1361-6455 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD NOV 14 PY 1994 VL 27 IS 21 BP 5389 EP 5404 DI 10.1088/0953-4075/27/21/026 PG 16 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA PT060 UT WOS:A1994PT06000026 ER PT J AU ABE, F ALBROW, MG AMIDEI, D ANTOS, J ANWAYWIESE, C APOLLINARI, G ARETI, H ATAC, M AUCHINCLOSS, P AZFAR, F AZZI, P BACCHETTA, N BADGETT, W BAILEY, MW BAO, J DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BARTALINI, P 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 BERTOLUCCI, S BHATTI, A BIERY, K BINKLEY, M BIRD, F BISELLO, D BLAIR, RE BLOCKER, C BODEK, A BOKHARI, W BOLOGNESI, V BORTOLETTO, D BOSWELL, C BOULOS, T BRANDENBURG, G 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 CEN, Y CERVELLI, F CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENGELS, E ENO, S ERREDE, D ERREDE, S FAN, Q FARHAT, B FIORI, I FLAUGHER, B FOSTER, GW FRANKLIN, M FRAUTSCHI, M FREEMAN, J FRIEDMAN, J FRISCH, H FRY, A FUESS, TA FUKUI, Y FUNAKI, S GAGLIARDI, G GALEOTTI, S GALLINARO, M GARFINKEL, AF 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 GREWAL, A GRIECO, G GROER, L GROSSOPILCHER, C HABER, C HAHN, SR HAMILTON, R HANDLER, R HANS, RM HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HEINRICH, J CRONINHENNESSY, D HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUFFMAN, BT HUGHES, R HURST, P HUSTON, J HUTH, J HYLEN, J INCAGLI, M INCANDELA, J ISO, H JENSEN, H JESSOP, CP JOSHI, U KADEL, RW KAJFASZ, E KAMON, T KANEKO, T KARDELIS, DA KASHA, H KATO, Y KEEBLE, L KENNEDY, RD KEPHART, R KESTEN, P KESTENBAUM, D KEUP, RM KEUTELIAN, H KEYVAN, F 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 KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LECOMPTE, T LEONE, S LEWIS, JD LIMON, P LINDGREN, M LISS, TM LOCKYER, N LOOMIS, C LONG, O LORETI, M LOW, EH LU, J LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P 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 MICHAIL, G MIKAMO, S MILLER, M MILLER, R MIMASHI, T MISCETTI, S MISHINA, M MITSUSHIO, H MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T MUSGRAVE, P NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NODULMAN, L OGAWA, S OH, SH OHL, KE OISHI, R OKUSAWA, T PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARK, S PATRICK, J PAULETTA, G PAULINI, M PESCARA, L PETERS, MD PHILLIPS, TJ PIACENTINO, G PILLAI, M PLUNKETT, R PONDROM, L PRODUIT, N PROUDFOOT, J PTOHOS, F PUNZI, G RAGAN, K RIMONDI, F RISTORI, L ROACHBELLINO, M ROBERTSON, WJ RODRIGO, T ROMANO, J ROSENSON, L SAKUMOTO, WK SALTZBERG, D SANSONI, A SCARPINE, V SCHINDLER, A SCHLABACH, P SCHMIDT, EE SCHMIDT, MP SCHNEIDER, O SCIACCA, GF SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SGOLACCHIA, A SHAPIRO, M SHAW, NM SHEN, Q SHEPARD, PF SHIMOJIMA, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SINGH, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPALDING, J SPIEGEL, L SPHICAS, P SPIES, A STANCO, L STEELE, J STEFANINI, A STRAHL, K STRAIT, J STUART, D SULLIVAN, G SUMOROK, K SWARTZ, RL TAKAHASHI, T TAKIKAWA, K TARTARELLI, F TAYLOR, W TERAMOTO, Y TETHER, S THERIOT, D THOMAS, J THOMAS, TL THUN, R TIMKO, M TIPTON, P TITOV, A TKACZYK, S TOLLEFSON, K TOLLESTRUP, A TONNISON, J DETROCONIZ, JF TSENG, J TURCOTTE, M TURINI, N UEMURA, N UKEGAWA, F UNAL, G VANDENBRINK, S VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WICKLUND, AB WICKLUND, E WILKINSON, R WILLIAMS, HH WILSON, P WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YEH, P YIN, M YOH, J YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S AF ABE, F ALBROW, MG AMIDEI, D ANTOS, J ANWAYWIESE, C APOLLINARI, G ARETI, H ATAC, M AUCHINCLOSS, P AZFAR, F AZZI, P BACCHETTA, N BADGETT, W BAILEY, MW BAO, J DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BARTALINI, P 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 BERTOLUCCI, S BHATTI, A BIERY, K BINKLEY, M BIRD, F BISELLO, D BLAIR, RE BLOCKER, C BODEK, A BOKHARI, W BOLOGNESI, V BORTOLETTO, D BOSWELL, C BOULOS, T BRANDENBURG, G 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 CEN, Y CERVELLI, F CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENGELS, E ENO, S ERREDE, D ERREDE, S FAN, Q FARHAT, B FIORI, I FLAUGHER, B FOSTER, GW FRANKLIN, M FRAUTSCHI, M FREEMAN, J FRIEDMAN, J FRISCH, H FRY, A FUESS, TA FUKUI, Y FUNAKI, S GAGLIARDI, G GALEOTTI, S GALLINARO, M GARFINKEL, AF 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 GREWAL, A GRIECO, G GROER, L GROSSOPILCHER, C HABER, C HAHN, SR HAMILTON, R HANDLER, R HANS, RM HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HEINRICH, J CRONINHENNESSY, D HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUFFMAN, BT HUGHES, R HURST, P HUSTON, J HUTH, J HYLEN, J INCAGLI, M INCANDELA, J ISO, H JENSEN, H JESSOP, CP JOSHI, U KADEL, RW KAJFASZ, E KAMON, T KANEKO, T KARDELIS, DA KASHA, H KATO, Y KEEBLE, L KENNEDY, RD KEPHART, R KESTEN, P KESTENBAUM, D KEUP, RM KEUTELIAN, H KEYVAN, F 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 KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LECOMPTE, T LEONE, S LEWIS, JD LIMON, P LINDGREN, M LISS, TM LOCKYER, N LOOMIS, C LONG, O LORETI, M LOW, EH LU, J LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P 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 MICHAIL, G MIKAMO, S MILLER, M MILLER, R MIMASHI, T MISCETTI, S MISHINA, M MITSUSHIO, H MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T MUSGRAVE, P NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NODULMAN, L OGAWA, S OH, SH OHL, KE OISHI, R OKUSAWA, T PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARK, S PATRICK, J PAULETTA, G PAULINI, M PESCARA, L PETERS, MD PHILLIPS, TJ PIACENTINO, G PILLAI, M PLUNKETT, R PONDROM, L PRODUIT, N PROUDFOOT, J PTOHOS, F PUNZI, G RAGAN, K RIMONDI, F RISTORI, L ROACHBELLINO, M ROBERTSON, WJ RODRIGO, T ROMANO, J ROSENSON, L SAKUMOTO, WK SALTZBERG, D SANSONI, A SCARPINE, V SCHINDLER, A SCHLABACH, P SCHMIDT, EE SCHMIDT, MP SCHNEIDER, O SCIACCA, GF SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SGOLACCHIA, A SHAPIRO, M SHAW, NM SHEN, Q SHEPARD, PF SHIMOJIMA, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SINGH, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPALDING, J SPIEGEL, L SPHICAS, P SPIES, A STANCO, L STEELE, J STEFANINI, A STRAHL, K STRAIT, J STUART, D SULLIVAN, G SUMOROK, K SWARTZ, RL TAKAHASHI, T TAKIKAWA, K TARTARELLI, F TAYLOR, W TERAMOTO, Y TETHER, S THERIOT, D THOMAS, J THOMAS, TL THUN, R TIMKO, M TIPTON, P TITOV, A TKACZYK, S TOLLEFSON, K TOLLESTRUP, A TONNISON, J DETROCONIZ, JF TSENG, J TURCOTTE, M TURINI, N UEMURA, N UKEGAWA, F UNAL, G VANDENBRINK, S VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WICKLUND, AB WICKLUND, E WILKINSON, R WILLIAMS, HH WILSON, P WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YEH, P YIN, M YOH, J YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S TI PRECISION-MEASUREMENT OF THE PROMPT PHOTON CROSS-SECTION IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID = 1.8 TEV; PARTON 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ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. TEXAS A&M UNIV,COLLEGE STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. UNIV PITTSBURGH,PITTSBURGH,PA 15260. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014 OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787 NR 13 TC 98 Z9 98 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 NOV 14 PY 1994 VL 73 IS 20 BP 2662 EP 2666 DI 10.1103/PhysRevLett.73.2662 PG 5 WC Physics, Multidisciplinary SC Physics GA PQ932 UT WOS:A1994PQ93200007 ER PT J AU ABE, F ALBROW, MG AMIDEI, D ANTOS, J ANWAYWIESE, C APOLLINARI, G ARETI, H ATAC, M AUCHINCLOSS, P AZFAR, F AZZI, P BACCHETTA, N BADGETT, W BAILEY, MW BAO, J DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BARTALINI, P 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 BERTOLUCCI, S BHATTI, A BIERY, K BINKLEY, M BIRD, F BISELLO, D BLAIR, RE BLOCKER, C BODEK, A BOLOGNESI, V BORTOLETTO, D BOSWELL, C BOULOS, T BRANDENBURG, G 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 CEN, Y CERVELLI, F CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENGELS, E ENO, S ERREDE, D ERREDE, S FAN, Q FARHAT, B FIORI, I FLAUGHER, B FOSTER, GW FRANKLIN, M FRAUTSCHI, M FREEMAN, J FRIEDMAN, J FRISCH, H FRY, A FUESS, TA FUKUI, Y FUNAKI, S GAGLIARDI, G GALEOTTI, S GALLINARO, M GARFINKEL, AF 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 GREWAL, A GRIECO, G GROER, L GROSSOPILCHER, C HABER, C HAHN, SR HAMILTON, R HANDLER, R HANS, RM HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HEINRICH, J CRONINHENNESSY, D HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUFFMAN, BT HUGHES, R HURST, P HUSTON, J HUTH, J HYLEN, J INCAGLI, M INCANDELA, J ISO, H JENSEN, H JESSOP, CP JOSHI, U KADEL, RW KAJFASZ, E KAMON, T KANEKO, T KARDELIS, DA KASHA, H KATO, Y KEEBLE, L KENNEDY, RD KEPHART, R KESTEN, P KESTENBAUM, D KEUP, RM KEUTELIAN, H KEYVAN, F 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 KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LECOMPTE, T LEONE, S LEWIS, JD LIMON, P LINDGREN, M LISS, TM LOCKYER, N LONG, O LOOMIS, C LORETI, M LOW, EH LU, J LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P 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 MICHAIL, G MIKAMO, S MILLER, M MILLER, R MIMASHI, T MISCETTI, S MISHINA, M MITSUSHIO, H MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T MUSGRAVE, P NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NODULMAN, L OGAWA, S OH, SH OHL, KE OISHI, R OKUSAWA, T PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARK, S PATRICK, J PAULETTA, G PAULINI, M PESCARA, L PETERS, MD PHILLIPS, TJ PIACENTINO, G PILLAI, M PLUNKETT, R PONDROM, L PRODUIT, N PROUDFOOT, J PTOHOS, F PUNZI, G RAGAN, K RIMONDI, F RISTORI, L ROACHBELLINO, M ROBERTSON, WJ RODRIGO, T ROMANO, J ROSENSON, L SAKUMOTO, WK SALTZBERG, D SANSONI, A SCARPINE, V SCHINDLER, A SCHLABACH, P SCHMIDT, EE SCHMIDT, MP SCHNEIDER, O SCIACCA, GF SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SGOLACCHIA, A SHAPIRO, M SHAW, NM SHEN, Q SHEPARD, PF SHIMOJIMA, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SINGH, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPALDING, J SPIEGEL, L SPHICAS, P SPIES, A STANCO, L STEELE, J STEFANINI, A STRAHL, K STRAIT, J STUART, D SULLIVAN, G SUMOROK, K SWARTZ, RL TAKAHASHI, T TAKIKAWA, K TARTARELLI, F TAYLOR, W TERAMOTO, Y TETHER, S THERIOT, D THOMAS, J THOMAS, TL THUN, R TIMKO, M TIPTON, P TITOV, A TKACZYK, S TOLLEFSON, K TOLLESTRUP, A TONNISON, J DETROCONIZ, JF TSENG, J TURCOTTE, M TURINI, N UEMURA, N UKEGAWA, F UNAL, G VANDENBRINK, S VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WICKLUND, AB WICKLUND, E WILKINSON, R WILLIAMS, HH WILSON, P WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YEH, P YIN, M YOH, J YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S AF ABE, F ALBROW, MG AMIDEI, D ANTOS, J ANWAYWIESE, C APOLLINARI, G ARETI, H ATAC, M AUCHINCLOSS, P AZFAR, F AZZI, P BACCHETTA, N BADGETT, W BAILEY, MW BAO, J DEBARBARO, P BARBAROGALTIERI, A BARNES, VE BARNETT, BA BARTALINI, P 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 BERTOLUCCI, S BHATTI, A BIERY, K BINKLEY, M BIRD, F BISELLO, D BLAIR, RE BLOCKER, C BODEK, A BOLOGNESI, V BORTOLETTO, D BOSWELL, C BOULOS, T BRANDENBURG, G 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 CEN, Y CERVELLI, F CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENGELS, E ENO, S ERREDE, D ERREDE, S FAN, Q FARHAT, B FIORI, I FLAUGHER, B FOSTER, GW FRANKLIN, M FRAUTSCHI, M FREEMAN, J FRIEDMAN, J FRISCH, H FRY, A FUESS, TA FUKUI, Y FUNAKI, S GAGLIARDI, G GALEOTTI, S GALLINARO, M GARFINKEL, AF 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 GREWAL, A GRIECO, G GROER, L GROSSOPILCHER, C HABER, C HAHN, SR HAMILTON, R HANDLER, R HANS, RM HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HEINRICH, J CRONINHENNESSY, D HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUFFMAN, BT HUGHES, R HURST, P HUSTON, J HUTH, J HYLEN, J INCAGLI, M INCANDELA, J ISO, H JENSEN, H JESSOP, CP JOSHI, U KADEL, RW KAJFASZ, E KAMON, T KANEKO, T KARDELIS, DA KASHA, H KATO, Y KEEBLE, L KENNEDY, RD KEPHART, R KESTEN, P KESTENBAUM, D KEUP, RM KEUTELIAN, H KEYVAN, F 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 KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LECOMPTE, T LEONE, S LEWIS, JD LIMON, P LINDGREN, M LISS, TM LOCKYER, N LONG, O LOOMIS, C LORETI, M LOW, EH LU, J LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P 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 MICHAIL, G MIKAMO, S MILLER, M MILLER, R MIMASHI, T MISCETTI, S MISHINA, M MITSUSHIO, H MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T MUSGRAVE, P NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NODULMAN, L OGAWA, S OH, SH OHL, KE OISHI, R OKUSAWA, T PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARK, S PATRICK, J PAULETTA, G PAULINI, M PESCARA, L PETERS, MD PHILLIPS, TJ PIACENTINO, G PILLAI, M PLUNKETT, R PONDROM, L PRODUIT, N PROUDFOOT, J PTOHOS, F PUNZI, G RAGAN, K RIMONDI, F RISTORI, L ROACHBELLINO, M ROBERTSON, WJ RODRIGO, T ROMANO, J ROSENSON, L SAKUMOTO, WK SALTZBERG, D SANSONI, A SCARPINE, V SCHINDLER, A SCHLABACH, P SCHMIDT, EE SCHMIDT, MP SCHNEIDER, O SCIACCA, GF SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SGOLACCHIA, A SHAPIRO, M SHAW, NM SHEN, Q SHEPARD, PF SHIMOJIMA, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SINGH, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPALDING, J SPIEGEL, L SPHICAS, P SPIES, A STANCO, L STEELE, J STEFANINI, A STRAHL, K STRAIT, J STUART, D SULLIVAN, G SUMOROK, K SWARTZ, RL TAKAHASHI, T TAKIKAWA, K TARTARELLI, F TAYLOR, W TERAMOTO, Y TETHER, S THERIOT, D THOMAS, J THOMAS, TL THUN, R TIMKO, M TIPTON, P TITOV, A TKACZYK, S TOLLEFSON, K TOLLESTRUP, A TONNISON, J DETROCONIZ, JF TSENG, J TURCOTTE, M TURINI, N UEMURA, N UKEGAWA, F UNAL, G VANDENBRINK, S VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WICKLUND, AB WICKLUND, E WILKINSON, R WILLIAMS, HH WILSON, P WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YEH, P YIN, M YOH, J YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S TI SEARCH FOR THE TOP-QUARK DECAYING TO A CHARGED-HIGGS-BOSON IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID Z0 DECAYS 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. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL H3A 2T8,PQ,CANADA. UNIV TORONTO,TORONTO M5S 1A7,ON,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. MIT,CAMBRIDGE,MA 02139. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. 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 PITTSBURGH,PITTSBURGH,PA 15260. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. TEXAS A&M UNIV,COLLEGE STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. ROCKEFELLER UNIV,NEW YORK,NY 10021. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Warburton, Andreas/N-8028-2013 OI Paulini, Manfred/0000-0002-6714-5787; Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Warburton, Andreas/0000-0002-2298-7315 NR 23 TC 17 Z9 17 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 NOV 14 PY 1994 VL 73 IS 20 BP 2667 EP 2671 DI 10.1103/PhysRevLett.73.2667 PG 5 WC Physics, Multidisciplinary SC Physics GA PQ932 UT WOS:A1994PQ93200008 ER PT J AU CAUSSYN, DD BALL, M BRABSON, B BUDNICK, J DERENCHUK, V EAST, G ELLISON, M FRIESEL, D HAMILTON, B HEDBLOM, K JONES, WP LEE, SY LI, D LIU, JY LOFNES, T NG, KY RIABKO, A SLOAN, T WANG, Y AF CAUSSYN, DD BALL, M BRABSON, B BUDNICK, J DERENCHUK, V EAST, G ELLISON, M FRIESEL, D HAMILTON, B HEDBLOM, K JONES, WP LEE, SY LI, D LIU, JY LOFNES, T NG, KY RIABKO, A SLOAN, T WANG, Y TI NEGATIVE-RESISTANCE INSTABILITY DUE TO NONLINEAR DAMPING SO PHYSICAL REVIEW LETTERS LA English DT Article ID SYNCHROTRON; MODULATION; BEAM C1 UNIV UPPSALA,SVEDBERG LAB,S-75121 UPPSALA,SWEDEN. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP CAUSSYN, DD (reprint author), INDIANA UNIV,CYCLOTRON FACIL,2401 MILO B SAMPSON LANE,BLOOMINGTON,IN 47408, USA. NR 16 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 14 PY 1994 VL 73 IS 20 BP 2696 EP 2699 DI 10.1103/PhysRevLett.73.2696 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ932 UT WOS:A1994PQ93200015 ER PT J AU MIZUNO, K BAHR, R BAUER, BS CRAXTON, RS DEGROOT, JS DRAKE, RP SEKA, W SLEAFORD, B AF MIZUNO, K BAHR, R BAUER, BS CRAXTON, RS DEGROOT, JS DRAKE, RP SEKA, W SLEAFORD, B TI DIRECT MEASUREMENTS OF THE ION-ACOUSTIC DECAY INSTABILITY IN A LASER-PRODUCED, LARGE-SCALE, HOT PLASMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID PARAMETRIC-INSTABILITIES C1 UNIV ROCHESTER,LASER ENERGET LAB,ROCHESTER,NY 14623. UNIV CALIF DAVIS,DAVIS,CA 95616. RP MIZUNO, K (reprint author), LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,POB 808,LIVERMORE,CA 94551, USA. RI Drake, R Paul/I-9218-2012 OI Drake, R Paul/0000-0002-5450-9844 NR 14 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 14 PY 1994 VL 73 IS 20 BP 2704 EP 2707 DI 10.1103/PhysRevLett.73.2704 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ932 UT WOS:A1994PQ93200017 ER PT J AU DISCHER, DE MOHANDAS, N EVANS, EA AF DISCHER, DE MOHANDAS, N EVANS, EA TI MOLECULAR MAPS OF RED-CELL DEFORMATION - HIDDEN ELASTICITY AND IN-SITU CONNECTIVITY SO SCIENCE LA English DT Article ID HUMAN-ERYTHROCYTE-MEMBRANE; BLOOD-CELLS; PROTEIN 4.1; SPECTRIN; SKELETON; BAND-3 AB Fluorescence-imaged micropipette aspiration was used to map redistribution of the proteins and lipids in highly extended human red blood cell membranes. Whereas the fluid bilayer distributed uniformly (+/-10 percent), the underlying, solidlike cytoskeleton of spectrin, actin, and protein 4.1 exhibited a steep gradient in density along the aspirated projection, which was reversible on release from deformation. Quantitation of the cytoskeletal protein density gradients showed that skeletal elasticity is well represented by a grafted polymer network with a ratio of surface dilation modulus to shear modulus of approximately 2:1. Fractionally mobile integral proteins, such as band 3, and highly mobile receptors, such as CD59 as well as glycophorin C in protein 4.1-deficient cells, appeared to be squeezed out of areas dense in the underlying network and enriched in areas of network dilation. This complementary segregation demonstrates patterning of cell surface components by cytoskeletal dilation. C1 UNIV CALIF SAN FRANCISCO, SAN FRANCISCO, CA USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV LIFE SCI, BERKELEY, CA 94720 USA. UNIV BRITISH COLUMBIA, DEPT PATHOL, VANCOUVER V6T 1W5, BC, CANADA. UNIV BRITISH COLUMBIA, DEPT PHYS, VANCOUVER V6T 1W5, BC, CANADA. RP UNIV CALIF BERKELEY, JOINT GRAD GRP BIOENGN, BERKELEY, CA 94720 USA. FU NHLBI NIH HHS [R01 HL31579-13]; NIDDK NIH HHS [R01 DK26263-15, P01 DK32094-09] NR 33 TC 237 Z9 244 U1 5 U2 36 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD NOV 11 PY 1994 VL 266 IS 5187 BP 1032 EP 1035 DI 10.1126/science.7973655 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PQ924 UT WOS:A1994PQ92400041 PM 7973655 ER PT J AU COLOMBI, S AF COLOMBI, S TI A SKEWED LOGNORMAL APPROXIMATION TO THE PROBABILITY-DISTRIBUTION FUNCTION OF THE LARGE-SCALE DENSITY FIELD SO ASTROPHYSICAL JOURNAL LA English DT Article DE LARGE-SCALE STRUCTURE OF UNIVERSE; GALAXIES, CLUSTERING ID UNIVERSE; GRAVITY; COUNTS; FLUCTUATIONS; CELLS AB I propose a method to fit the probability distribution function (PDF) of the large-scale density field rho, motivated by a Lagrangian version of the continuity equation. It consists in applying the Edgeworth expansion to the quantity Phi = log rho - [log rho]. The method is tested on the matter particle distribution in two cold dark matter N-body simulations of different physical sizes to cover a large dynamic range. It is seen to be very efficient, even in the nonlinear regime, and may thus be used as an analytical tool to study the effect on the PDF of the transition between the weakly nonlinear regime and the highly nonlinear regime. RP COLOMBI, S (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 18 TC 40 Z9 40 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 NOV 10 PY 1994 VL 435 IS 2 BP 536 EP 539 DI 10.1086/174834 PN 1 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000003 ER PT J AU MURRAY, SD CASTOR, JI KLEIN, RI MCKEE, CF AF MURRAY, SD CASTOR, JI KLEIN, RI MCKEE, CF TI ACCRETION DISK CORONAE IN HIGH-LUMINOSITY SYSTEMS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; GALAXIES, ACTIVE; STARS, CORONAE; X-RAYS, STARS ID COMPTON HEATED WINDS; EMISSION; REGIONS AB We present the results of self-consistent models of Compton-heated accretion disk coronae. The models are calculated using a new method for computing monochromatic radiative transfer in two dimensions. The method splits the radiation into direct and scattered components. The direct radiation is computed by calculating the optical depth along rays, while transfer of the scattered radiation is approximated by flux-limited diffusion. The resulting code agrees with more accurate treatments to within 50%, and is highly efficient, making it practical for use in large hydrodynamic simulations. The coronal models are used to confirm the results of earlier work, and to extend it to higher luminosities. In contrast to earlier work, which found the outer disks to be shadowed by the inner corona at high luminosities, we find our results to form an almost continuous extension of the models at lower luminosities. This is due to the presence of multiply scattered radiation, which acts to partially offset the loss of direct radiation from the central source. Although the analytic methods derived at lower luminosities cannot be used to derive the coronal structure for L/L(Edd) greater than or similar to 0.1, the results of the models are amenable to semiempirical fits. We also discuss possible observational consequences of the results for coronal veiling and line fluorescence from the disk. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RP MURRAY, SD (reprint author), 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 28 TC 20 Z9 20 U1 2 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 10 PY 1994 VL 435 IS 2 BP 631 EP 646 DI 10.1086/174842 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000011 ER PT J AU LOCHNER, JC ROUSSELDUPRE, D AF LOCHNER, JC ROUSSELDUPRE, D TI RECURRENCE TIMES AND PERIODICITIES IN 4U-1608-52 AS OBSERVED BY VELA-5B SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, INDIVIDUAL (4U 1608-52); X-RAYS, BURSTS; X-RAYS, STARS ID X-RAY TRANSIENTS; IRRADIATED ACCRETION DISKS; AQUILA X-1; MODEL; INSTABILITY; SUPERHUMPS; EVOLUTION; PERIOD; BURSTS AB We report on the Vela 5B 10 year history of the soft X-ray transient 4U 1608-52, and on the characteristics of its soft X-ray outbursts. The Vela 5B satellite observed the four known outbursts in 1975, 1977, and 1979, and four new outbursts in 1970 and 1971, altering the recurrence pattern of outbursts from this source. One of the 1970 outbursts is symmetric in its intensity profile, while the two outbursts in 1971 have short exponential profiles separated by 80 days. Despite suggestive recurrence periods of similar to 85 and similar to 150 days evident in the time intervals between the outbursts, there is no single statistically significant recurrence time on which the outbursts recur consistently. In the 1970 symmetric event, there is evidence for a period of either 4.10 or 5.19 days. Drawing upon the analogy with SU Ursa Majoris dwarf novae, we suggest that the short period is orbital and any longer period would be associated with a precession period of the accretion disk. C1 LOS ALAMOS NATL LAB,ASTROPHYS & RADIAT MEASUREMENT GRP,LOS ALAMOS,NM 87545. UNIV SPACE RES ASSOC,GREENBELT,MD 20771. RP LOCHNER, JC (reprint author), NASA,GODDARD SPACE FLIGHT CTR,HIGH ENERGY ASTROPHYS LAB,CODE 6680,GREENBELT,MD 20771, USA. NR 38 TC 25 Z9 25 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 NOV 10 PY 1994 VL 435 IS 2 BP 840 EP 847 DI 10.1086/174863 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000032 ER PT J AU JUSTTANONT, K SKINNER, CJ TIELENS, AGGM AF JUSTTANONT, K SKINNER, CJ TIELENS, AGGM TI MOLECULAR ROTATIONAL LINE-PROFILES FROM OXYGEN-RICH RED GIANT WINDS SO ASTROPHYSICAL JOURNAL LA English DT Article DE CIRCUMSTELLAR MATTER; LINE, PROFILES; MOLECULAR PROCESSES; STARS, GIANTS; STARS, MASS LOSS ID MASS-LOSS RATES; CIRCUMSTELLAR DUST SHELLS; NEWTON-RAPHSON OPERATOR; OH-IR STARS; COMOVING-FRAME; EVOLVED STARS; CO EMISSION; SOBOLEV APPROXIMATION; INFRARED-EMISSION; CARBON-MONOXIDE AB We have developed a radiative transfer model of the dust and gas envelopes around late-type stars. The gas kinetic temperature for each star is calculated by solving equations of motion and the energy balance simultaneously. The main processes include viscous heating and adiabatic and radiative cooling. Heating is dominated by viscosity as the grains stream outward through the gas, with some contribution in oxygen-rich stars by near-IR pumping of H2O followed by collisional de-excitation in the inner envelope. For O-rich stars, rotational H2O cooling is a dominant mechanism in the middle part of the envelope, with CO cooling being less significant. We have applied our model to three well-studied oxygen-rich red giant stars. The three stars cover a wide range of mass-loss rates, and hence they have different temperature structures. The derived temperature structures are used in calculating CO line profiles for these objects. Comparison of the dust and gas mass-loss rates suggests that mass-loss rates are not constant during the asymptotic giant branch phase. In particular, the results show that the low CO 1-0 antenna temperatures of OH/IR stars reflect an earlier phase of much lower mass-loss rate. C1 UNIV LONDON UNIV COLL,DEPT PHYS & ASTRON,LONDON WC1E 6BT,ENGLAND. INST ASTROPHYS,F-75014 PARIS,FRANCE. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94581. UNIV MANCHESTER,NUFFIELD RADIO ASTRON LABS,JODRELL BANK,MACCLESFIELD SK11 9DL,CHESHIRE,ENGLAND. RP JUSTTANONT, K (reprint author), NASA,AMES RES CTR,MS245-3,MOFFETT FIELD,CA 94035, USA. OI /0000-0003-1689-9201 NR 39 TC 56 Z9 56 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 NOV 10 PY 1994 VL 435 IS 2 BP 852 EP 863 DI 10.1086/174865 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ970 UT WOS:A1994PQ97000034 ER PT J AU WIRTH, GD KOO, DC KRON, RG AF WIRTH, GD KOO, DC KRON, RG TI HUBBLE-SPACE-TELESCOPE OBSERVATIONS OF THE DISTANT CLUSTER CL-0016+16 - QUANTITATIVE MORPHOLOGY OF CONFIRMED CLUSTER MEMBERS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES; CLUSTERS OF; GALAXIES; EVOLUTION; GALAXIES; PHOTOMETRY; GALAXIES; STRUCTURE ID SURFACE BRIGHTNESS; GALAXIES; EVOLUTION; PHOTOMETRY; Z=0.54 AB We present Hubble Space Telescope (HST) images of 24 confirmed members of the distant galaxy cluster Cl 0016 + 16 at redshift 0.55. The Balmer-strong (''E + A'') and emission-line galaxies frequently show unusual visual morphology, implying that galaxian interactions produce ''active'' galaxies in moderate-redshift clusters. We use an image concentration index as a quantitative measure of morphology to show that these unusual galaxies appear disklike, while the normal red galaxies resemble E/SO galaxies. Although consistent with HST observations by Dressier et al. in Cl 0939 + 4713 (z = 0.41), our results differ from the Couch et al. finding that most Balmer-strong galaxies in AC 114 (z = 0.31) resemble ellipticals. The entire ''E + A'' sample is small, but if future studies confirm their diversity, it will suggest that they have different origins. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP WIRTH, GD (reprint author), UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064, USA. OI Koo, David/0000-0003-3385-6799 NR 15 TC 30 Z9 30 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 NOV 10 PY 1994 VL 435 IS 2 BP L105 EP L108 DI 10.1086/187605 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PQ973 UT WOS:A1994PQ97300007 ER PT J AU XIE, P AF XIE, P TI LASER-INDUCED PHOTOCHROMIC EFFECT IN TH3+-DOPED SILICA FIBERS SO ELECTRONICS LETTERS LA English DT Article DE OPTICAL FIBERS; RARE-EARTH DOPED FIBERS; PHOTOCHROMISM ID OPTICAL FIBERS; GRATINGS AB Broad-band visible absorption was induced in Tb3+ doped silica fibres when Tb3+ ions were resonantly excited at wavelengths of 476.5, 488 and 496.5 nm. The induced absorption can be partially bleached by green light at 514 nm and blue light at 457.9 nm. RP XIE, P (reprint author), LOS ALAMOS NATL LAB,MS E535,LOS ALAMOS,NM 87544, USA. NR 10 TC 7 Z9 7 U1 0 U2 2 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 NOV 10 PY 1994 VL 30 IS 23 BP 1970 EP 1971 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA PV483 UT WOS:A1994PV48300049 ER PT J AU BLASE, X RUBIO, A LOUIE, SG COHEN, ML AF BLASE, X RUBIO, A LOUIE, SG COHEN, ML TI STABILITY AND BAND-GAP CONSTANCY OF BORON-NITRIDE NANOTUBES SO EUROPHYSICS LETTERS LA English DT Article ID ELECTRONIC-STRUCTURE; FORM; SEMICONDUCTORS; INSULATORS AB Extensive LDA and quasi-particle calculations have been performed on boron nitride (BN) single-wall and multi-wall nanotubes. Strain energies are found to be smaller for BN nanotubes than for carbon nanotubes of the same radius, owing to a buckling effect which stabilizes the BN tubular structure. For tubes larger than 9.5 angstrom in diameter, the lowest conduction band is predicted to be free-electron-like with electronic charge density localized inside the tube. For these tubes, this band is at constant energy above the top of the valence band. Consequently, contrarily to carbon nanotubes, single- and multi-wall BN nanotubes are constant-band-gap materials, independent of their radius and helicity. In addition, we expect them to exhibit remarkable properties under n-type doping. RP BLASE, X (reprint author), LAWRENCE BERKELEY LAB,DEPT PHYS,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Rubio, Angel/A-5507-2008 OI Rubio, Angel/0000-0003-2060-3151 NR 16 TC 1027 Z9 1046 U1 11 U2 87 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 NOV 10 PY 1994 VL 28 IS 5 BP 335 EP 340 DI 10.1209/0295-5075/28/5/007 PG 6 WC Physics, Multidisciplinary SC Physics GA PT466 UT WOS:A1994PT46600007 ER PT J AU DEGIORGI, L HUNT, MB OTT, HR DRESSEL, M FEENSTRA, BJ GRUNER, G FISK, Z CANFIELD, PC AF DEGIORGI, L HUNT, MB OTT, HR DRESSEL, M FEENSTRA, BJ GRUNER, G FISK, Z CANFIELD, PC TI OPTICAL EVIDENCE OF ANDERSON-MOTT LOCALIZATION IN FESI SO EUROPHYSICS LETTERS LA English DT Article ID CAVITY PERTURBATION TECHNIQUE AB We have investigated the electrodynamic response of single-crystalline FeSi over a frequency range from d.c. to 10(5) cm-1. At low frequencies, we found evidence for an Anderson-Mott localization behaviour of the low-temperature optical conductivity, while at high frequencies the excitation spectrum resembles that of a conventional semiconductor. The missing spectral weight below the gap energy is redistributed around the gap edge, in disagreement with previous claims based on optical measurements. C1 UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90024 USA. UNIV CALIF LOS ANGELES, CTR SOLID STATE SCI, LOS ANGELES, CA 90024 USA. LOS ALAMOS NATL LAB, DIV MAT SCI & TECHNOL, LOS ALAMOS, NM 87545 USA. RP DEGIORGI, L (reprint author), SWISS FED INST TECHNOL, FESTKORPERPHYS LAB, CH-8093 ZURICH, SWITZERLAND. RI Dressel, Martin/D-3244-2012; Canfield, Paul/H-2698-2014 NR 20 TC 55 Z9 55 U1 1 U2 3 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 NOV 10 PY 1994 VL 28 IS 5 BP 341 EP 346 DI 10.1209/0295-5075/28/5/008 PG 6 WC Physics, Multidisciplinary SC Physics GA PT466 UT WOS:A1994PT46600008 ER PT J AU RECHES, Z SCHUBERT, G ANDERSON, C AF RECHES, Z SCHUBERT, G ANDERSON, C TI MODELING OF PERIODIC GREAT EARTHQUAKES ON THE SAN-ANDREAS FAULT - EFFECTS OF NONLINEAR CRUSTAL THEOLOGY SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID CALIFORNIA; STRESS; ASTHENOSPHERE; DEFORMATION; CYCLES AB We analyze the cycle of great earthquakes along the San Andreas fault with a finite element numerical model of deformation in a crust with a nonlinear viscoelastic theology. The viscous component of deformation has an effective viscosity that depends exponentially on the inverse absolute temperature and nonlinearly on the shear stress; the elastic deformation is linear. Crustal thickness and temperature are constrained by seismic and heat flow data for California. The models are for anti plane strain in a 25-km-thick crustal layer having a very long, vertical strike-slip fault; the crustal block extends 250 km to either side of the fault. During the earthquake cycle that lasts 160 years, a constant plate velocity v(p)/2 = 17.5 mm yr(-1) is applied to the base of the crust and to the vertical end of the crustal block 250 km away from the fault. The upper half of the fault is locked during the interseismic period, while its lower half slips; at the constant plate velocity. The locked part of the fault is moved abruptly 2.8 m every 160 years to simulate great earthquakes. The results are sensitive to crustal theology. Models with quartzite-like theology display profound transient stages in the velocity, displacement, and stress fields. The predicted transient zone extends about 3-4 times the crustal thickness on each side of the fault, significantly wider than the zone of deformation in elastic models. Models with diabase-like theology behave similarly to elastic models and exhibit no transient stages. The model predictions are compared with geodetic observations of fault-parallel velocities in northern and central California and local rates of shear strain along the San Andreas fault. The observations are best fit by models which are 10-100 times less viscous than a quartzite-like theology. Since the lower crust in California is composed of intermediate to mafic rocks, the present result;suggests that the in situ viscosity of the crustal rock is orders of magnitude less the rock viscosity determined in the laboratory. C1 UNIV CALIF LOS ANGELES, DEPT EARTH & SPACE SCI, LOS ANGELES, CA 90024 USA. UNIV CALIF LOS ANGELES, DEPT GEOPHYS & PLANETARY PHYS, LOS ANGELES, CA 90024 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM USA. RP RECHES, Z (reprint author), HEBREW UNIV JERUSALEM, INST EARTH SCI, DEPT GEOL, IL-91904 JERUSALEM, ISRAEL. NR 23 TC 17 Z9 17 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD NOV 10 PY 1994 VL 99 IS B11 BP 21983 EP 22000 DI 10.1029/94JB00334 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PR675 UT WOS:A1994PR67500032 ER PT J AU LEMISZKI, PJ LANDES, JD HATCHER, RD AF LEMISZKI, PJ LANDES, JD HATCHER, RD TI CONTROLS ON HINGE-PARALLEL EXTENSION FRACTURING IN SINGLE-LAYER TANGENTIAL-LONGITUDINAL STRAIN FOLDS SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID FINITE-ELEMENT; ROCKS; DEFORMATION; MECHANICS; LIMESTONE; EVOLUTION; FORELAND; GEOMETRY; PRESSURE; GROWTH AB The stress history results from a published viscous layer folding solution are used as the basis for a fracture mechanics analysis of the factors that control hinge-parallel extension fracturing in tangential-longitudinal strain folds. The analysis incorporates published results for the change in sedimentary rock mode I fracture toughness at increasing confining stress to examine the relationship between regional strain rate, depth of burial, pore fluid pressure, initial crack size, layer viscosity, and the amount of fold shortening required for the propagation of a bed-perpendicular, hinge-parallel extension fracture. Tangential-longitudinal strain folding of layers can occur at all scales in a foreland thrust system and is the result of the buckling and bending of stratigraphic units during the development of decollement, fault bend, and fault propagation folds. Hinge-parallel extension fractures oriented perpendicular to bedding are a common fracture set observed in tangential-longitudinal strain folds. The fractures propagate as a result of local tensile stresses that develop by the stretching of layers in the outer are. of fold hinges during bending. We considered a range of geologically reasonable boundary conditions to show that at one extreme, fracturing can occur as a result of only minor shortening by folding to the other extreme where a tight fold can form with no associated extension fracturing. For folds formed at shallow depths, where the confining stress on the system is less than the bending stresses in the layer and where the confining stress has not greatly increased the fracture toughness of the rock, hinge-parallel extension fractures can grow under hydrostatic fluid pressure conditions. As depth increases, however, much higher pore fluid pressures are required to cause fracturing under similar strain rates. The observed controls are used to hypothesize how hinge-parallel extension fracturing in fault bend folds can vary spatially and temporally across a thrust belt as a function of strain (thrusting) rate, the amount of bending at thrust ramps, and the depth of folding. C1 UNIV TENNESSEE, DEPT GEOL SCI, KNOXVILLE, TN 37996 USA. UNIV TENNESSEE, DEPT ENGN SCI & MECH, KNOXVILLE, TN 37996 USA. RP LEMISZKI, PJ (reprint author), OAK RIDGE NATL LAB, DIV ENVIRONM SCI, POB 2008, OAK RIDGE, TN 37831 USA. NR 71 TC 25 Z9 26 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD NOV 10 PY 1994 VL 99 IS B11 BP 22027 EP 22041 DI 10.1029/94JB01853 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PR675 UT WOS:A1994PR67500035 ER PT J AU LIANG, GL NOID, DW SUMPTER, BG WUNDERLICH, B AF LIANG, GL NOID, DW SUMPTER, BG WUNDERLICH, B TI GAUCHE DEFECTS, POSITIONAL DISORDER, DISLOCATIONS, AND SLIP PLANES IN CRYSTALS OF LONG METHYLENE SEQUENCES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; NORMAL-ALKANES; CONFORMATIONAL DISORDER; POLYMETHYLENE CRYSTALS; PHASE-TRANSITIONS AB Conformational disorder in crystals of long methylene sequences in the form of gauche defects has been studied in the last few years in our laboratory by using large-scale molecular dynamics stimulations. The distribution of gauche defects within crystals simulated under different conditions and temperatures has been extracted and is shown to depend mainly on temperature and to some degree on external constraints. The crystal surfaces, and especially those that contain chain ends, have a higher probability for conformational disorder. The results supplement available experimental data and provide atomistic details about this dynamic disorder. Plastic deformation could be produced by letting a compressed crystal expand in one direction. Positional disorder, dislocations, and slip planes were produced in this process and are detailed. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 23 TC 21 Z9 21 U1 0 U2 3 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 NOV 10 PY 1994 VL 98 IS 45 BP 11739 EP 11744 DI 10.1021/j100096a018 PG 6 WC Chemistry, Physical SC Chemistry GA PQ944 UT WOS:A1994PQ94400018 ER PT J AU BINER, SB AF BINER, SB TI A NUMERICAL-ANALYSIS OF FRACTURE AND HIGH-TEMPERATURE CREEP CHARACTERISTICS OF BRITTLE-MATRIX COMPOSITES WITH DISCONTINUOUS DUCTILE REINFORCEMENTS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID VOID NUCLEATION; METAL; TOUGHNESS; CERAMICS; FLOW; STRENGTH; GROWTH; AL AB The role of the material parameters and interface characteristics in the fracture and creep behavior of discontinuous ductile fiber-reinforced brittle matrix composite systems was investigated numerically. To simulate the fracture behavior, the ductile fibers were modelled using a constitutive relationship that accounts for strength degradation resulting from the nucleation and growth of voids. The matrix was assumed to be elastic and fails according to requirements of a stress criterion. The debonding behavior at the fiber interfaces was simulated in terms of a cohesive zone model which describes the decohesion by both normal and tangential separation. Results indicate that for rigid interfaces between the ductile reinforcing phase and the matrix the contribution of the ductile reinforcement to the work-of-fracture value (toughness) of the composite increases with less exhaustion of its work-hardening capacity before the onset of matrix failure. Therefore the failure strength and elastic modulus values of the matrix become important material parameters. In the case of interfacial debonding the load transfer to the discontinuous reinforcements after matrix failure should be somehow maintained for utilization to full capacity of the reinforcement and interfacial behavior. In the creep regime, for rigidly bonded interfaces the creep rate of the composite is not significantly influenced by the material properties and geometric parameters of the ductile reinforcing phase owing to the development of triaxial stress state and constrained deformation in the reinforcement. For debonding interfaces the geometric parameters of the reinforcing phase become important; however, even with very weak interfacial behavior, low composite creep rates can be achieved by suitable selection of the geometric parameters of the ductile reinforcing phase. Significant increases in room temperature fracture toughness can be achieved without extensively sacrificing the creep strength by ductile discontinuous reinforcements. RP BINER, SB (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 32 TC 5 Z9 5 U1 0 U2 0 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 NOV 10 PY 1994 VL 187 IS 2 BP 125 EP 138 DI 10.1016/0921-5093(94)90339-5 PG 14 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PP775 UT WOS:A1994PP77500004 ER PT J AU HARASYN, DE HEESTAND, RL LIU, CT AF HARASYN, DE HEESTAND, RL LIU, CT TI DEEP-DRAWING OF IR-0.3-PERCENT-W ALLOYS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article AB Cold-worked 0.65 mm thick Ir-0.3%W alloy sheet was deep drawn 45% into 28 mm diameter cups at temperatures below 600 degrees C using a single draw process, BN powder for lubrication, and electrically heated H-12 steel tooling. A ductile-brittle transition temperature was observed near 550 degrees C. Below this temperature failures occurred at the bend radius. The failure mechanism can be understood in terms of the tensile properties of the alloy. The frequency of cracks caused by tensile stress decreased with increasing drawing temperature above the ductile/brittle transition temperature. The strain ratio r was determined to be 0.6 for alloy sheets tested at 500 degrees C. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP HARASYN, DE (reprint author), ROSEMOUNT INC,8200 MKT BLVD,CHANHASSEN,MN 55317, USA. OI Liu, Chain Tsuan/0000-0001-7888-9725 NR 10 TC 7 Z9 7 U1 0 U2 0 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 NOV 10 PY 1994 VL 187 IS 2 BP 155 EP 160 DI 10.1016/0921-5093(94)90342-5 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA PP775 UT WOS:A1994PP77500007 ER PT J AU JACOB, OC AF JACOB, OC TI MANIFESTLY PARITY COVARIANT FRONT-FORM QUANTIZATION SO MODERN PHYSICS LETTERS A LA English DT Article ID LIGHT-CONE QUANTIZATION; INFINITE-MOMENTUM FRAME; QUANTUM FIELD-THEORIES; DIRAC FIELDS; SCALAR; LIOUVILLE; QCD AB Recently, we proposed a new front-form quantization which treated both the x(t) and the x- coordinates as front-form 'times'. This quantization was found to preserve parity explicitly. In this letter we extend this construction to fermion fields in the context of the Yukawa theory. We quantize this theory using a method proposed originally by Faddeev and Jackiw. We find that P- and P+ become dynamical and that the theory is manifestly invariant under parity. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP JACOB, OC (reprint author), SONOMA STATE UNIV,DEPT PHYS & ASTRON,1801 E COTATI AVE,ROHNERT PK,CA 94928, USA. NR 24 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 NOV 10 PY 1994 VL 9 IS 34 BP 3219 EP 3228 DI 10.1142/S0217732394003038 PG 10 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA PX042 UT WOS:A1994PX04200008 ER PT J AU FEIBELMAN, PJ HARRIS, J AF FEIBELMAN, PJ HARRIS, J TI SURFACE-CHEMISTRY - SURMOUNTING THE BARRIERS SO NATURE LA English DT Editorial Material C1 BIOSYM TECHNOL INC,SAN DIEGO,CA 92121. RP FEIBELMAN, PJ (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 8 TC 16 Z9 16 U1 1 U2 2 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD NOV 10 PY 1994 VL 372 IS 6502 BP 135 EP 136 DI 10.1038/372135a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PQ688 UT WOS:A1994PQ68800034 ER PT J AU ABRIKOSOV, AA AF ABRIKOSOV, AA TI ON THE ISOTOPE EFFECT IN THE E-L MODEL OF HIGH-T-C LAYERED CUPRATES SO PHYSICA C LA English DT Article AB The change of the isotope effect is studied in the framework of the model based on the assumptions of the dominant role of extended saddle-point singularities in the electron spectrum and a long-range phonon-mediated interaction between electrons (E-L model). The idea is that if the distance between the Fermi energy and the saddle point is less than the Debye energy, this distance defines the effective energy scale, and hence there is no isotope effect, whereas in the opposite case the Debye energy defines the cut off, and the usual isotope effect is restored. The cross-over between these regimes is studied, A comparison with existing experimental data shows that the concept reflects correctly the observed trends. RP ABRIKOSOV, AA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 13 TC 20 Z9 20 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 10 PY 1994 VL 233 IS 1-2 BP 102 EP 106 DI 10.1016/0921-4534(94)00497-8 PG 5 WC Physics, Applied SC Physics GA PT214 UT WOS:A1994PT21400014 ER PT J AU IWASAWA, K SAKATA, F NAZAREWICZ, W MARUMORI, T TERASAKI, J AF IWASAWA, K SAKATA, F NAZAREWICZ, W MARUMORI, T TERASAKI, J TI CONFIGURATION-CONSTRAINED HARTREE-FOCK METHOD - AN ILLUSTRATIVE EXAMPLE SO PHYSICS LETTERS B LA English DT Article ID MOTION; NUCLEI AB The structure of solutions of the constrained Hartree-Fock method is studied within the time-dependent Hartree-Fock formalism. A new method for reaching various stationary Hartree-Fock points, not accessible by the usual adiabatic constrained Hartree-Fock method, is proposed. C1 OAK RIDGE NATL LAB, JOINT INST HEAVY ION RES, OAK RIDGE, TN 37831 USA. OAK RIDGE NATL LAB, DIV PHYS, OAK RIDGE, TN 37831 USA. UNIV WARSAW, INST THEORET PHYS, PL-00681 WARSAW, POLAND. SCI UNIV TOKYO, FAC SCI, DEPT PHYS, TOKYO 162, JAPAN. RP UNIV TOKYO, INST NUCL STUDY, TANASHI, TOKYO 188, JAPAN. NR 18 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD NOV 10 PY 1994 VL 339 IS 1-2 BP 1 EP 6 DI 10.1016/0370-2693(94)91123-1 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PQ573 UT WOS:A1994PQ57300001 ER PT J AU GIELE, WT GLOVER, EWN KOSOWER, DA AF GIELE, WT GLOVER, EWN KOSOWER, DA TI THE SAME-SIDE OPPOSITE-SIDE 2-JET RATIO SO PHYSICS LETTERS B LA English DT Article ID HIGHER-ORDER CORRECTIONS; CROSS-SECTIONS; SCATTERING; HERA; QCD AB We study the next-to-leading order QCD corrections to the same-side/opposite-side two jet ratio at Fermilab energies and show that the theoretical uncertainty on the factorization/renormalization scale is reduced. At large pseudorapidity the difference between the predictions for singular and non-singular gluon distributions is 25% while the remaining scale uncertainty is significantly smaller than this. C1 UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. CENS,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE. RP GIELE, WT (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. RI Glover, Edward/A-4597-2012 OI Glover, Edward/0000-0002-0173-4175 NR 16 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD NOV 10 PY 1994 VL 339 IS 1-2 BP 181 EP 186 DI 10.1016/0370-2693(94)91152-5 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PQ573 UT WOS:A1994PQ57300030 ER PT J AU PERKINS, LS DEPRISTO, AE AF PERKINS, LS DEPRISTO, AE TI HETEROGENEOUS ADATOM DIFFUSION ON FCC(100) SURFACES - NI, CU, RH, PD, AND AG SO SURFACE SCIENCE LA English DT Article ID CORRECTED EFFECTIVE-MEDIUM; IRIDIUM; RE; IR; REPLACEMENT; PLATINUM; TUNGSTEN; BEHAVIOR; CLUSTERS; IR(111) AB We present activation barriers and prefactors for the migration of heterogeneous adatoms on fcc(100) surfaces. Two mechanisms are considered in this paper: (1) hopping of the adatom from one four-fold hollow site to an adjacent four-fold hollow site via a two-fold bridge site; and (2) exchange of the adatom with an atom in the first surface layer. Twenty heterogeneous combinations of Ni, Cu, Rh, Pd, and Ag were treated using transition state theory, and select comparisons were made to the results of finite temperature molecular dynamics simulations. The interaction potentials were generated using the molecular dynamics/Monte Carlo corrected effective medium (MD/MC-CEM) theory throughout. We find that the final state energies differ due to the variation of metallic bonding with coordination for the different types of metal atoms. This variation with coordination is reflected in the surface energies of the two metals, and thus this macroscopic quantity can be used to correlate the amount of energy gained or released when the adatom displaces a surface atom. Due to the non-directional character of metallic bonding in the fee metals, this difference in energetic stability of final configurations is also found to generally determine whether bridge hopping diffusion or atomic displacement is the dominant kinetic process in these heterogeneous systems. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 32 TC 20 Z9 20 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 10 PY 1994 VL 319 IS 3 BP 225 EP 231 DI 10.1016/0039-6028(94)90589-4 PG 7 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PP812 UT WOS:A1994PP81200004 ER PT J AU HENDERSON, MA AF HENDERSON, MA TI THE INFLUENCE OF OXIDE SURFACE-STRUCTURE ON ADSORBATE CHEMISTRY - DESORPTION OF WATER FROM THE SMOOTH, THE MICROFACETED AND THE ION SPUTTERED SURFACES OF TIO2(100) SO SURFACE SCIENCE LA English DT Article ID TEMPERATURE-PROGRAMMED DESORPTION; ENERGY ELECTRON-DIFFRACTION; RUTILE SURFACES; INFRA-RED; PHOTOELECTRON-SPECTROSCOPY; THERMAL-DESORPTION; TIO2(001) SURFACE; CRYSTAL-SURFACES; CU FILMS; TIO2 AB The relationship between oxide surface structure and oxide surface chemistry was examined by studying the desorption of water from three structurally unique surfaces of the (100) face of TiO2 (rutile): the smooth (1 X 1) surface, the microfaceted (1 X 3) surface and the ion sputtered surface. The (1 X 1) surface structure reflects bulk termination along the (100) plane. This surface possesses one type of surface Ti site. The (1 X 3) surface has {110} microfacets and possesses three distinctly different surface Ti sites. On each surface, water adsorbed at 130 K with unity sticking probability and was the only detectable desorption product between 130 and 800 K. Water exposures below 2.2 X 10(14) molecules/cm(2) (0.30 ML) desorbed from the (1 X 1) and (1 X 3) surfaces in similar TPD peaks at 350 K. The zero coverage desorption energies from both surfaces were estimated to be 18 kcal/mol. TPD spectra from higher water exposures were very different for the (1 X 1) and (1 X 3) surfaces. A single desorption feature was observed from the (1 X 3) surface which shifted from 350 K at low exposure to 238 K as the monolayer saturated. Two distinct TPD features were observed for submonolayer exposures on the (1 X 1) surface. The first feature saturated with an exposure of 2.2 X 10(14) molecules/cm(2) at 350 K and the second grew in at 250 K with higher exposures. Assignment of these two peaks to dissociative and molecular states of water, respectively, was chosen over assignment to two different adsorption sites or phases of molecular water. Direct comparison of TPD data from the two surfaces indicates that the (1 X 1) surface binds more water above room temperature than does the (1 X 3) surface. There were subtle differences between water interactions with two-coordinate bridging O2- sites (second layer water) on the two surfaces which suggested the bridging O2- atoms on the (1 X 3) surface were more basic. In general, water was more weakly bound to the sputtered surface than to either the (1 X 1) or (1 X 3) surfaces, although some irreversible water decomposition (1.3 X 10(14) molecules/cm(2)) occurred. RP HENDERSON, MA (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, POB 999,MS K2-12, RICHLAND, WA 99352 USA. NR 59 TC 87 Z9 87 U1 2 U2 19 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 10 PY 1994 VL 319 IS 3 BP 315 EP 328 DI 10.1016/0039-6028(94)90598-3 PG 14 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PP812 UT WOS:A1994PP81200013 ER PT J AU HUANG, HH SEET, CS XU, GQ HRBEK, JA AF HUANG, HH SEET, CS XU, GQ HRBEK, JA TI HYDROGEN ADSORPTION ON SULFUR AND NITROGEN COVERED RU(001) SURFACES SO SURFACE SCIENCE LA English DT Article ID DESORPTION-KINETICS; RUTHENIUM 001; PHASE-DIAGRAM; CATALYSTS; OXYGEN; MODEL; COADSORPTION; AMMONIA; STATES; SITES AB Hydrogen adsorption on nitrogen- and sulfur-modified Ru(001) surfaces was investigated using X-ray and ultra-violet photoelectron spectroscopies (XPS and WS), low-energy electron diffraction (LEED) and thermal desorption spectroscopy (TDS). On a S-covered Ru(001), two thermal desorption peaks of hydrogen at 135 and 265 K were clearly observed at sulfur coverages > 0.1, at which p(2 X 2)-S islands start to form. The intensities of these two peaks increase with theta(S) up to 0.21, and then decrease rapidly at higher sulfur coverages. At theta(S) = 0.33, corresponding to a complete (root 3 X root 3)R30 degrees LEED pattern, hydrogen adsorption was fully suppressed. Compared with hydrogen desorption from H2S decomposition on Ru(001), it was concluded that the hydrogen desorption peak at 135 K is correlated with the formation of p(2 X 2)-S unit cells. Our experiments further demonstrate that preadsorbed N-atoms also inhibit the adsorption of hydrogen with each N-adatom blocking four hydrogen adsorption sites. C1 BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. RP HUANG, HH (reprint author), NATL UNIV SINGAPORE, DEPT CHEM, 10 KENT RIDGE CRESCENT, SINGAPORE 0511, SINGAPORE. RI Xu, Guo Qin/C-2077-2013; Hrbek, Jan/I-1020-2013 NR 43 TC 3 Z9 3 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 10 PY 1994 VL 319 IS 3 BP 344 EP 352 DI 10.1016/0039-6028(94)90601-7 PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA PP812 UT WOS:A1994PP81200016 ER PT J AU ZYGMUNT, SA BRAND, HV LUCAS, DJ ITON, LE CURTISS, LA AF ZYGMUNT, SA BRAND, HV LUCAS, DJ ITON, LE CURTISS, LA TI THEORETICAL-STUDIES OF HYDROGEN-BONDED COMPLEXES OF H3SIO(H)ALH3 WITH OH2, NH3, AND CH4 SO THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID PROTON AFFINITIES; AB-INITIO; GAUSSIAN-2 THEORY; ZEOLITES; ABINITIO; ADSORPTION; ENERGIES; CLUSTER; H-ZSM-5; 1ST-ROW AB The hydrogen-bonded complexes ZH ... OH2, ZH ... NH3, and ZH ... CH4 (where ZH = H3SiO(H)AlH3) have been studied al different levels of ab initio molecular orbital theory with the highest level being G2(MP2) theory. These complexes are models for adsorption of CH4, NH3, and H2O at acid sites in zeolites. We have also considered complexes where the hydroxyl hydrogen has been transferred, i.e. Z(-) ... HOH2+, Z(-) ... HNH3+, and Z(-) ... HCH4+. Both rigid and relaxed geometries have been considered. The results provide benchmark calculations for future studies of molecular interactions at acid sites in zeolites using larger aluminosilicate clusters. The HF/3-21G level of theory systematically overestimates the binding of the complexes by 5-10 kcal mol(-1). When going beyond the HF/6-31G(d) level of theory, electron correlation stabilizes the complexes while extended basis sets, which include polarization and diffuse functions, cause destabilization. Complexation energies obtained at the G2(MP2) level are reproduced to better than 1 kcal mol(-1) by the MP2/6-311+G(3df,2p) level of theory, indicating that the dominant correlation correction is obtained by second-order Moller-Plesset perturbation theory. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 31 TC 0 Z9 0 U1 2 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 THEOCHEM-J MOL STRUC JI Theochem-J. Mol. Struct. PD NOV 10 PY 1994 VL 120 IS 1-2 BP 113 EP 123 PG 11 WC Chemistry, Physical SC Chemistry GA PT744 UT WOS:A1994PT74400011 ER PT J AU LUO, XL KUBAS, GJ BURNS, CJ ECKERT, J AF LUO, XL KUBAS, GJ BURNS, CJ ECKERT, J TI SYNTHESIS AND CHARACTERIZATION OF MOLYBDENUM COMPLEXES CONTAINING DIPHOSPHINE LIGANDS OF THE TYPE (ARCH2)(2)PC2H4P(CH2AR)(2)(AR=C(6)H(4)X) - ELECTRONIC CONTROL OF ETA(2)-DIHYDROGEN VERSUS DIHYDRIDE COORDINATION IN MOH2(CO)((RCH(2))(2)PC2H4P(CH(2)R)(2))(2) (R= ME, PR-I, C(6)H(4)X) AND IMPLICATIONS ON THE REACTION COORDINATE FOR H-2 CLEAVAGE SO INORGANIC CHEMISTRY LA English DT Review ID MOLECULAR-HYDROGEN COMPLEXES; TRANSITION-METAL COMPLEXES; M = FE; TUNGSTEN DINITROGEN COMPLEXES; H-H BOND; DIHYDROGEN COMPLEXES; C-H; CATALYTIC-HYDROGENATION; SELECTIVE HYDROGENATION; SOLUTION EQUILIBRIUM AB The bis(dinitrogen)molybdenum complexes trans-Mo(N-2)(2){(ArCH2)(2)PC2H4P(CH2Ar)(2)}(2) (Ar = C6H5 (1a), C6H4- m-Me (1b), C6H4-o-Me (1c), C6H4-p-Me (1d), C6H4-o-F (1e), C6H4-m-F (1f) C6H4-p-F (1g), C6H4-m-OMe (1h), C6H4-p-OMe (ii)) are prepared by reduction of MoCl5 with magnesium under a dinitrogen atmosphere in the presence of the appropriate diphosphine ligand. Treatment of la and Ib with ethyl acetate in refluxing benzene under argon affords the formally 16-electron complexes Mo(CO){(ArCH2)(2)PC2H4P(CH2Ar)(2)}(2) (Ar = C6H5 (2a), C6H4-m-Me (2b)), which are shown by H-1 NMR spectroscopy to contain an agostic Mo H-C interaction between the molybdenum and an ortho aryl hydrogen atom. Complexes 2a and 2b react readily with small molecules H-2, N-2, and SO2 to give the adducts trans-Mo(L)(CO){(ArCH2)(2)PC2H4P(CH2Ar)(2)}(2) (L = eta(2)-H-2, Ar = C6H5 (3a), C6H4-m-Me (3b); L = N-2, Ar = C6H5 (4a), C6H4-m-Me (4b); L = SO2, Ar = C6H5 (5a), C6H4-m-Me (5b)). In contrast to the dihydride formulation in MoH2(CO){(RCH(2))(2)PC2H4P(CH(2)R)(2)}(2) (R = Me, Pr-i), the eta(2)-H-2 coordination in 3a and 3b is unambiguously established by IR, NMR, and neutron scattering spectroscopies and a single-crystal X-ray diffraction analysis of 3b. Thus, electronic control of eta(2)-dihydrogen versus dihydride coordination has been achieved in complexes of the type MoH2(CO){(RCH(2))(2)PC2H4P(CH(2)R)(2)}(2), an eta(2)-dihydrogen complex being formed when R is an electron-withdrawing aryl group, whereas a dihydride is formed when R is an electron-donating alkyl group. The spectroscopic data for 3a and 3b indicate that they exist exclusively as eta(2)-dihydrogen complexes with a normal H-H distance bath in solution and in the solid state, and so neither an elongated H-H bond nor an eta(2)-dihydrogen/dihydride tautomeric equilibrium has been observed although the pi-basicity of the metal center appears to be very close to the point where the H-H bond cleavage is expected to occur. This supports the suggestion that the reaction coordinate for H-2 cleavage in the molybdenum-diphosphine. system is rather flat and shows relatively little change in the H-H distance until relatively precipitous cleavage of the H-H bond. Crystallographic data for 3b: monoclinic, space group C2/c, a = 26.782(5) Angstrom, b = 9.365(2) Angstrom, c = 25.399(5) Angstrom, beta = 111.75(3)degrees, V = 5921(5) Angstrom(3), Z = 4, and R = 0.058. Crystallographic data for 4a: monoclinic, space group C2/c, a = 23.644(5) Angstrom, b = 13.558(3) Angstrom, c = 17.525(4) Angstrom, beta = 108.97(3)degrees, V = 5313 (4) Angstrom(3), Z = 4, and R = 0.034. C1 LOS ALAMOS NATL LAB, INORGAN & STRUCT CHEM GRP CST3, LOS ALAMOS, NM 87545 USA. LOS ALAMOS NATL LAB, LANSCE, LOS ALAMOS, NM 87545 USA. NR 108 TC 30 Z9 30 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD NOV 9 PY 1994 VL 33 IS 23 BP 5219 EP 5229 DI 10.1021/ic00101a013 PG 11 WC Chemistry, Inorganic & Nuclear SC Chemistry GA PQ769 UT WOS:A1994PQ76900013 ER PT J AU WHITE, GF BRONZINI, MS COLGLAZIER, EW DOHRENWEND, B ERIKSON, K HANSEN, R KNEESE, AV MOORE, R PAGE, EB RAPPAPORT, RA AF WHITE, GF BRONZINI, MS COLGLAZIER, EW DOHRENWEND, B ERIKSON, K HANSEN, R KNEESE, AV MOORE, R PAGE, EB RAPPAPORT, RA TI SOCIOECONOMIC STUDIES OF HIGH-LEVEL NUCLEAR WASTE-DISPOSAL SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Review DE PERMANENT REPOSITORY; RISK ASSESSMENT; STATE FEDERAL COOPERATION; INTERDISCIPLINARY INVESTIGATION ID REPOSITORY; RISK AB The socioeconomic investigations of possible impacts of the proposed repository for high-level nuclear waste at Yucca Mountain, Nevada, have been unprecedented in several respects. They bear on the public decision that sooner or later will be made as to where and how to dispose permanently of the waste presently at military weapons installations and that continues to accumulate at nuclear power stations. No final decision has yet been made. There is no clear precedent from other countries. The organization of state and federal studies is unique. The state studies involve more disciplines than any previous efforts. They have been carried out in parallel to federal studies and have pioneered in defining some problems and appropriate research methods. A recent annotated bibliography provides interested scientists with a compact guide to the 178 published reports, as well as to relevant journal articles and related documents. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NATL ACAD SCI,WASHINGTON,DC 20418. COLUMBIA UNIV,NEW YORK,NY 10032. YALE UNIV,NEW HAVEN,CT 06520. ARMAUER HANSEN RES INST,WINSLOW,WA 98110. RESOURCES FUTURE INC,WASHINGTON,DC 20036. RICHARD MOORE,CHEYENNE,WY 82001. BECHTEL INC,WASHINGTON,DC 20005. UNIV MICHIGAN,ANN ARBOR,MI 48109. RP WHITE, GF (reprint author), UNIV COLORADO,BOULDER,CO 80309, USA. NR 28 TC 0 Z9 0 U1 0 U2 1 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 NOV 8 PY 1994 VL 91 IS 23 BP 10786 EP 10789 DI 10.1073/pnas.91.23.10786 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA PQ938 UT WOS:A1994PQ93800007 PM 7971963 ER PT J AU REDMAN, DA FOLLSTAEDT, DM GUILINGER, TR KELLY, MJ AF REDMAN, DA FOLLSTAEDT, DM GUILINGER, TR KELLY, MJ TI PHOTOLUMINESCENCE AND PASSIVATION OF SILICON NANOSTRUCTURES SO APPLIED PHYSICS LETTERS LA English DT Article ID POROUS SILICON AB A new method was used to fabricate nanometer-scale structures in Si for photoluminescence studies. Helium ions were implanted to form a dense subsurface layer of small cavities (1-16 nm diameter). Implanted specimens subjected to annealing in a variety of atmospheres yielded no detectable photoluminescence. However, implantation combined with electrochemical anodization produced a substantial blueshift relative to anodization alone. This blueshift is consistent with the quantum confinement model of photoluminescence in porous silicon. (C) American Institute of Physics. RP REDMAN, DA (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 13 TC 9 Z9 10 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 NOV 7 PY 1994 VL 65 IS 19 BP 2386 EP 2388 DI 10.1063/1.113036 PG 3 WC Physics, Applied SC Physics GA PQ174 UT WOS:A1994PQ17400004 ER PT J AU HARTEMANN, FV FOCHS, SN MCNALLY, JD BURNS, S LUHMANN, NC PERRY, MD CHU, KR AF HARTEMANN, FV FOCHS, SN MCNALLY, JD BURNS, S LUHMANN, NC PERRY, MD CHU, KR TI COHERENT PHOTOELECTRON BUNCH GENERATION AND QUANTUM EFFICIENCY ENHANCEMENT IN A PHOTOCATHODE OPTICAL-RESONATOR SO APPLIED PHYSICS LETTERS LA English DT Article ID FREE-ELECTRON LASERS; MODE-LOCKING; PULSES; PERFORMANCE; DRIVEN; DESIGN; POWER AB A novel scheme producing multiple, coherently phased, high charge (nC), short duration (ps) electron bunches in a radio-frequency (rf) photoinjector is presented. In this configuration, the mirror photocathode is an integral part of an optical resonator. The ultrashort laser pulse is reflected off the photocathode and recirculated through the optical cavity at a subharmonic of the rf drive frequency after extracting a photoelectron bunch. This new technique can dramatically increase the effective quantum efficiency of metals and produce high current, high brightness, prebunched electron beams ideally suited for high power coherent microwave generation. A proof-of-principle experiment operating at 0.250 GHz and using a frequency-quadrupled, mode-locked Nd:YAG laser has shown the production of a train of coherently phased photoelectron bunches, with a measured effective quantum efficiency enhancement of 4.2. (C) 1994 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NATL TSING HUA UNIV,DEPT PHYS,HSINCHU,TAIWAN. RP HARTEMANN, FV (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616, USA. NR 18 TC 2 Z9 2 U1 2 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 NOV 7 PY 1994 VL 65 IS 19 BP 2404 EP 2406 DI 10.1063/1.112689 PG 3 WC Physics, Applied SC Physics GA PQ174 UT WOS:A1994PQ17400010 ER PT J AU SCHULZ, DL PARILLA, PA GINLEY, DS VOIGT, JA ROTH, EP AF SCHULZ, DL PARILLA, PA GINLEY, DS VOIGT, JA ROTH, EP TI THICK C-AXIS TEXTURED (TL,PB) (BA,SR)(2)CA2CU3O9/AG-0.37 SUPERCONDUCTING TAPES BY AN INK SPRAY-PYROLYSIS METHOD USING A TL-FREE PRECURSOR SO APPLIED PHYSICS LETTERS LA English DT Article ID FILMS; OXIDE; VAPOR AB In this letter we demonstrate a synthetic route to thick (5-20 mu m) highly c-axis textured, nearly phase-pure superconducting (Tl,Pb) (Ba,Sr)(2)Ca2Cu3O9/Ag-0.37 tapes. First, a Tl-free ink consisting of Pb0.5Ba0.4Sr1.6Ca2.0CU3.0O9/Ag-0.37 precursor powder in an ethanolic ethyl cellulose binder is sprayed onto a heated LaAlO3 substrate. After an intermediate oxygen anneal to remove the carbonaceous binder, a static 2-zone thallination anneal is performed to promote superconducting phase formation. Films exhibit excellent c-axis texturing as evidenced by x-ray diffraction theta/2 theta and rocking curve characterization with morphological evidence for partial melting by scanning electron microscopy. Electrical characterization of these films give T-c onset values of 106-115 K with T-c zero reached by 99-101 K and transport J(c(77 K)) UP to 2.9 X 10(4) A/cm(2). A mixed strong/weak-linked magnetic field dependence is observed for these films at 77 K and 0.4 T. (C) 1994 American Institute of Physics. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP SCHULZ, DL (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 19 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD NOV 7 PY 1994 VL 65 IS 19 BP 2472 EP 2474 DI 10.1063/1.112711 PG 3 WC Physics, Applied SC Physics GA PQ174 UT WOS:A1994PQ17400033 ER PT J AU STIEGEL, GJ SRIVASTAVA, RD AF STIEGEL, GJ SRIVASTAVA, RD TI NATURAL-GAS CONVERSION TECHNOLOGIES SO CHEMISTRY & INDUSTRY LA English DT Article ID METHANE C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,GAS LIQUIDS PROGRAM,PITTSBURGH,PA 15236. PITTSBURGH ENERGY TECHNOL CTR,BURNS & ROE SERV CORP,LIQUEFACT GRP,PITTSBURGH,PA. RP STIEGEL, GJ (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,OFF PROJECT MANAGEMENT,INDIRECT LIQUEFACT PROGRAM,POB 10940,PITTSBURGH,PA 15236, USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU SOC CHEMICAL INDUSTRY PI LONDON PA 14 BELGRAVE SQUARE, LONDON, ENGLAND SW1X 8PS SN 0009-3068 J9 CHEM IND-LONDON JI Chem. Ind. PD NOV 7 PY 1994 IS 21 BP 854 EP 856 PG 3 WC Chemistry, Applied SC Chemistry GA PQ556 UT WOS:A1994PQ55600007 ER PT J AU CHAU, LL SHAW, JC YEN, HC AF CHAU, LL SHAW, JC YEN, HC TI N-SOLITON-TYPE SOLUTIONS OF SU(2) SELF-DUALITY YANG-MILLS EQUATIONS IN VARIOUS SPACES AND THEIR BACKLUND-TRANSFORMATIONS SO JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL LA English DT Article ID GAUGE-THEORY; MONOPOLES; FIELDS AB We show that Getmanov's N-soliton-type solutions in the self-duality Yang-Mills (SDYM) equations in the (+---)-signatured M4-space can be derived in a unified way similar to that of deriving 't Hooft's instanton solutions in the (++++)-signatured E4-space. Further, we show that such N-soliton-type solutions can also be constructed for the SDYM equations in the (+-+-)-signatured real D4-space. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NATL CHIAO TUNG UNIV,DEPT APPL MATH,HSINCHU,TAIWAN. NATL CHIAO TUNG UNIV,DEPT PHYS,HSINCHU,TAIWAN. RP CHAU, LL (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0305-4470 J9 J PHYS A-MATH GEN JI J. Phys. A-Math. Gen. PD NOV 7 PY 1994 VL 27 IS 21 BP 7131 EP 7138 DI 10.1088/0305-4470/27/21/028 PG 8 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA PQ910 UT WOS:A1994PQ91000028 ER PT J AU SILVESTER, E GRIESER, F HEALY, TW MEISEL, D SULLIVAN, JC AF SILVESTER, E GRIESER, F HEALY, TW MEISEL, D SULLIVAN, JC TI THERMODYNAMICS AND KINETICS OF THE REACTION OF COPPER(II) AND IRON(III) WITH ULTRA-SMALL COLLOIDAL CHALCOPYRITE (CUFES2) SO JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS LA English DT Article ID OXIDATION; SOLS AB The kinetics of oxidation of colloidal chalcopyrite (CuFeS2) have been examined in the presence of aqueous Fe(III) and Cu(II) at pH 2.3 and in the presence of radiolytically generated Fe(OH)2+ at neutral pH. The reaction of Cu(II) with CuFeS2 has been ascribed to an ion-exchange reaction of copper for iron in the CuFeS2 lattice. The initial copper sulfide phase that forms, as a result of the exhange, is rich in Cu(I) and thermally converts to the known covellite (CuS) phase. Oxidation of CuFeS2 by Fe(III) at low pH leads to the dissolution of the chalcopyrite phase and the formation of Fe2+ (aq), Cu2+ (aq) and S(o)(s). The formation of an unstable intermediate CuS(y) phase is suggested from thermodynamic calculations. Under neutral pH conditions, CuFeS2 is oxidized by Fe(OH)2+ adsorbed on the particle surface. Oxidation is restricted to the first monolayer of the particles due to the formation of an Fe(III) hydroxide layer at the particle surface. The oxidation of CuFeS2 by Fe(OH)2+ is slower than by Fe3+ (aq), presumably due to the lower redox potential of the former species. C1 UNIV MELBOURNE,SCH CHEM,PARKVILLE,VIC 3052,AUSTRALIA. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 21 TC 4 Z9 4 U1 0 U2 4 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0956-5000 J9 J CHEM SOC FARADAY T JI J. Chem. Soc.-Faraday Trans. PD NOV 7 PY 1994 VL 90 IS 21 BP 3301 EP 3307 DI 10.1039/ft9949003301 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PP545 UT WOS:A1994PP54500015 ER PT J AU KULKARNI, S KRAUSE, S WIGNALL, GD HAMMOUDA, B AF KULKARNI, S KRAUSE, S WIGNALL, GD HAMMOUDA, B TI INVESTIGATION OF THE PORE STRUCTURE AND MORPHOLOGY OF CELLULOSE-ACETATE MEMBRANES USING SMALL-ANGLE NEUTRON-SCATTERING .1. CELLULOSE-ACETATE ACTIVE LAYER MEMBRANES SO MACROMOLECULES LA English DT Article ID PHASE INVERSION AB The structure of ultrathin cellulose acetate membranes, known as active layer membranes, has been investigated using small-angle neutron scattering. These membranes are known to have structural and functional similarity to the surface or ''skin'' layer in commercial reverse-osmosis (RO) membranes and hence are useful model systems for understanding the structure of the RO membrane skin layer. Active layer membranes were studied after swelling them with either D2O or CD3OD. The results in both cases clearly indicated the presence of very small (10-20 Angstrom) porous structures in the membrane. The presence of such pores has been a subject of long-standing controversy in this area. The data was analyzed using a modified Debye-Bueche analysis and the resultant membrane structure was seen to agree well with structural information from electron microscopic studies. Finally, a possible explanation for the differences in scattering observed between the D2O swollen membranes and the CD3OD swollen membranes has been presented. C1 RENSSELAER POLYTECH INST,POLYMER SCI & ENGN PROGRAM,TROY,NY 12180. RENSSELAER POLYTECH INST,DEPT CHEM,TROY,NY 12180. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NIST,CTR HIGH RESOLUT NEUTRON SCATTERING,GAITHERSBURG,MD 20899. NR 25 TC 8 Z9 8 U1 2 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD NOV 7 PY 1994 VL 27 IS 23 BP 6777 EP 6784 DI 10.1021/ma00101a016 PG 8 WC Polymer Science SC Polymer Science GA PQ783 UT WOS:A1994PQ78300016 ER PT J AU KULKARNI, S KRAUSE, S WIGNALL, GD AF KULKARNI, S KRAUSE, S WIGNALL, GD TI INVESTIGATION OF THE PORE STRUCTURE AND MORPHOLOGY OF CELLULOSE-ACETATE MEMBRANES USING SMALL-ANGLE NEUTRON-SCATTERING .2. ULTRAFILTRATION AND REVERSE-OSMOSIS MEMBRANES SO MACROMOLECULES LA English DT Article AB Pore structure in cellulose acetate ultrafiltration (UF) and reverse-osmosis (RO) membranes has been studied using small-angle neutron scattering. Scattering experiments were carried out on dry membranes as well as on membranes swollen with deuterated solvents (D2O and CD3OD). In addition, the RO membranes were studied both before and after annealing (a process of heating a membrane in a water bath at similar to 75 degrees C to improve its separation properties). The pore surface in UF membranes was found to be smooth and nonfractal, as evidenced by the fourth power law behavior at high and. Values of average pore sizes obtained for dry and solvent swollen membranes agree well, with pore sizes obtained by other methods. For cellulose acetate RO membranes in their dry state, the unannealed membrane appears to consist of two discrete pore size distributions in the intermediate and high Q region while the annealed membrane contains a much wider distribution of pore sizes. These results give a good account of the changes occurring in the structure of RO membranes as a result of annealing, and agree well with the predictions of other authors: C1 RENSSELAER POLYTECH INST,POLYMER SCI & ENGN PROGRAM,TROY,NY 12180. RENSSELAER POLYTECH INST,DEPT CHEM,TROY,NY 12180. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 15 TC 10 Z9 10 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD NOV 7 PY 1994 VL 27 IS 23 BP 6785 EP 6790 DI 10.1021/ma00101a017 PG 6 WC Polymer Science SC Polymer Science GA PQ783 UT WOS:A1994PQ78300017 ER PT J AU KARIM, A FELCHER, GP RUSSELL, TP AF KARIM, A FELCHER, GP RUSSELL, TP TI INTERDIFFUSION OF POLYMERS AT SHORT TIMES SO MACROMOLECULES LA English DT Article ID SPINODAL DECOMPOSITION; NEUTRON REFLECTION; DIFFUSION; REPTATION; INTERFACE; BLENDS; DYNAMICS; MIXTURES; CHAIN; FILMS AB The short-time interdiffusion between bilayers of protonated and deuterated polystyrene was measured using neutron reflectivity. The moments of the segment density profiles were used as a model-independent means of characterizing the interdiffusion. It is shown that for diffusion times between the Rouse relaxation time and the reptation time of a single chain, the concentration profile at the polymer/polymer interface can be described by a sharp gradient at the interface with a relatively long range decay away from it. With increasing molecular weight, the decay length increased substantially as expected for reptating chains. Furthermore, the effective diffusion coefficient is shown to decrease for all times less than the estimated reptation time and reduce to the bulk value at longer times. Critical slowing down effects of isotropic origin at the interface are shown to be of no consequences in these studies. C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. IBM CORP, ALMADEN RES CTR, DIV RES, SAN JOSE, CA 95120 USA. NR 35 TC 61 Z9 61 U1 1 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD NOV 7 PY 1994 VL 27 IS 23 BP 6973 EP 6979 DI 10.1021/ma00101a039 PG 7 WC Polymer Science SC Polymer Science GA PQ783 UT WOS:A1994PQ78300039 ER PT J AU BOFFA, LS NOVAK, BM AF BOFFA, LS NOVAK, BM TI BIMETALLIC SAMARIUM(III) INITIATORS FOR THE LIVING POLYMERIZATION OF METHACRYLATES AND LACTONES - A NEW ROUTE INTO TELECHELIC, TRIBLOCK, AND LINK-FUNCTIONALIZED POLYMERS SO MACROMOLECULES LA English DT Article ID MOLECULAR-WEIGHT POLYMERS; RAY CRYSTAL-STRUCTURE; ORGANOLANTHANIDE COMPLEXES; COPOLYMERS; POLY(EPSILON-CAPROLACTONE); REACTIVITY; (C5ME5)2SM; ALKYNE; METAL C1 UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, DIV SCI MAT, BERKELEY, CA 94720 USA. NR 30 TC 112 Z9 113 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD NOV 7 PY 1994 VL 27 IS 23 BP 6993 EP 6995 DI 10.1021/ma00101a044 PG 3 WC Polymer Science SC Polymer Science GA PQ783 UT WOS:A1994PQ78300044 ER PT J AU CHOU, WT CASTEN, RF ZAMFIR, NV BRENNER, DS BUCURESCU, D AF CHOU, WT CASTEN, RF ZAMFIR, NV BRENNER, DS BUCURESCU, D TI EXTENSION OF A NEARLY-GLOBAL ANHARMONIC VIBRATOR DESCRIPTION OF NUCLEI TO NONYRAST STATES SO NUCLEAR PHYSICS A LA English DT Article ID BANDS AB A study of gamma-band levels from Z = 30-82 allows an extension of a nearly-universal anharmonic vibrator description of nuclei to non-yrast states and shows that a multi-phonon picture gives an excellent description of the data. C1 INST ATOM PHYS,BUCHAREST,ROMANIA. CLARK UNIV,WORCESTER,MA 01610. UNIV COLOGNE,INST KERNPHYS,W-5000 COLOGNE 41,GERMANY. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP CHOU, WT (reprint author), NATL TSING HUA UNIV,HSINCHU 30043,TAIWAN. RI Zamfir, Nicolae Victor/F-2544-2011 NR 11 TC 10 Z9 11 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 NOV 7 PY 1994 VL 580 IS 1 BP 33 EP 42 DI 10.1016/0375-9474(94)90813-3 PG 10 WC Physics, Nuclear SC Physics GA PQ036 UT WOS:A1994PQ03600003 ER PT J AU AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB CLERBAUX, B COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNER, D GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WOLFF, T WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZHANG, Z ZIMMER, M ZIMMERMANN, W ZOMER, F ZUBER, K AF AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB CLERBAUX, B COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNER, D GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATHERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WOLFF, T WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZHANG, Z ZIMMER, M ZIMMERMANN, W ZOMER, F ZUBER, K TI DEEP-INELASTIC SCATTERING EVENTS WITH A LARGE RAPIDITY GAP AT HERA SO NUCLEAR PHYSICS B LA English DT Note ID LUND MONTE-CARLO; CROSS-SECTION; PHOTOPRODUCTION; DISTRIBUTIONS; HYDROGEN; ENERGIES; PHOTON; RHO-0 AB Evidence is presented using data taken with the H1 detector at HERA for a class of deep inelastic electron-proton scattering (DIS) events (5 < Q(2) < 120GeV(2)) at low Bjorken-x (10(-4) < x < 10(-2)) which have almost no hadronic energy flow in a large interval of pseudo-rapidity around the proton remnant direction and which cannot be attributed to our present understanding of DIS and fluctuations in final state hadronic fragmentation. From an integrated luminosity of 273 nb(-1) 734 events, that is about 5% of the total DIS sample, have no energy deposition greater than 400 MeV forward of laboratory pseudo-rapidity eta(max) = 1.8 up to the largest measurable pseudorapidity of about 3.65. Evidence that about 10% of observed rapidity gap events are exclusive vector meson electroproduction is presented. Good descriptions of the data are obtained using models based either on a vector meson dominance like picture, which includes a large fraction of inelastic virtual photon dissociation, or on deep inelastic electron-pomeron scattering in which the partonic sub-structure of the latter is resolved. C1 RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. FREE UNIV BRUSSELS,INTERUNIV INST HIGH ENERGIES,BRUSSELS,BELGIUM. UNIV INSTELLING ANTWERP,WILRIJK,BELGIUM. RUTHERFORD APPLETON LAB,DIDCOT,OXON,ENGLAND. INST NUCL PHYS,KRAKOW,POLAND. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA. UNIV CALIF DAVIS,IIRPA,DAVIS,CA. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND,GERMANY. CEA SACLAY,DSM,DAPNIA,GIF SUR YVETTE,FRANCE. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW,LANARK,SCOTLAND. DESY,HAMBURG,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG,GERMANY. UNIV HAMBURG,INST EXPTL PHYS 1,HAMBURG,GERMANY. UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,HEIDELBERG,GERMANY. CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,KOSICE 04353,SLOVAKIA. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON,ENGLAND. LUND UNIV,DEPT PHYS,LUND,SWEDEN. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. INST THEORET & EXPTL PHYS,MOSCOW,RUSSIA. PN LEBEDEV PHYS INST,MOSCOW,RUSSIA. UNIV AIX MARSEILLE 2,IN2P3,CNRS,CPPM,MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY. UNIV PARIS 11,LAL,IN2P3,CNRS,ORSAY,FRANCE. ECOLE POLYTECH,LPNHE,IN2P3,CNRS,PALAISEAU,FRANCE. UNIV PARIS 06,LPNHE,PARIS,FRANCE. UNIV PARIS 07,IN2P3,CNRS,PARIS,FRANCE. ACAD SCI CZECH REPUBL,INST PHYS,PRAGUE,CZECH REPUBLIC. CHARLES UNIV,CTR NUCL,PRAGUE,CZECH REPUBLIC. UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. INFN ROMA,ROME,ITALY. PAUL SCHERRER INST,VILLIGEN,SWITZERLAND. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,WUPPERTAL,GERMANY. DESY,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY. ETH ZURICH,INST TEILCHENPHYS,ZURICH,SWITZERLAND. UNIV ZURICH,INST PHYS,ZURICH,SWITZERLAND. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA. YEREVAN PHYS INST,YEREVAN,ARMENIA. RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. RP AHMED, T (reprint author), UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RI Vazdik, Iakov/N-2624-2015; Gorelov, Igor/J-9010-2015; Sheviakov, Igor/N-2735-2015; Danilov, Mikhail/C-5380-2014; Meyer, Curtis/L-3488-2014; Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015; Gogitidze, Nelli/N-1224-2015; Belousov, Anatoli/N-2102-2015; Kotelnikov, Sergey/A-9711-2014; Cvach, Jaroslav/G-6269-2014; OI Gorelov, Igor/0000-0001-5570-0133; Sheviakov, Igor/0000-0002-1659-3483; Danilov, Mikhail/0000-0001-9227-5164; Meyer, Curtis/0000-0001-7599-3973; Soloviev, Yury/0000-0003-1136-2827; Kotelnikov, Sergey/0000-0002-8027-4612; Beck, Hans Peter/0000-0001-7212-1096; Bassler, Ursula/0000-0002-9041-3057 NR 49 TC 222 Z9 223 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV 7 PY 1994 VL 429 IS 3 BP 477 EP 502 DI 10.1016/0550-3213(94)90151-1 PG 26 WC Physics, Particles & Fields SC Physics GA PR404 UT WOS:A1994PR40400001 ER PT J AU BARRETTE, J BELLWIED, R BENNETT, S BRAUNMUNZINGER, P CLELAND, WE CLEMEN, M COLE, J CORMIER, TM DAVID, G DEE, J DIETZSCH, O DRIGERT, M GILBERT, S HALL, JR HEMMICK, TK HERRMANN, N HONG, B JIANG, CL KWON, Y LACASSE, R LUKASZEW, A LI, Q LUDLAM, TW MCCORKLE, S MARK, SK MATHEUS, R OBRIEN, E PANITKIN, S PIAZZA, T PRUNEAU, C RAO, MN ROSATI, M DASILVA, NC SEDYKH, S SONNADARA, U STACHEL, J TAKAI, H TAKAGUI, EM VOLOSHIN, S WANG, G WESSELS, JP WOODY, CL XU, N ZHANG, Y ZHANG, Z ZOU, C AF BARRETTE, J BELLWIED, R BENNETT, S BRAUNMUNZINGER, P CLELAND, WE CLEMEN, M COLE, J CORMIER, TM DAVID, G DEE, J DIETZSCH, O DRIGERT, M GILBERT, S HALL, JR HEMMICK, TK HERRMANN, N HONG, B JIANG, CL KWON, Y LACASSE, R LUKASZEW, A LI, Q LUDLAM, TW MCCORKLE, S MARK, SK MATHEUS, R OBRIEN, E PANITKIN, S PIAZZA, T PRUNEAU, C RAO, MN ROSATI, M DASILVA, NC SEDYKH, S SONNADARA, U STACHEL, J TAKAI, H TAKAGUI, EM VOLOSHIN, S WANG, G WESSELS, JP WOODY, CL XU, N ZHANG, Y ZHANG, Z ZOU, C TI OBSERVATION OF ANISOTROPIC EVENT SHAPES AND TRANSVERSE FLOW IN ULTRARELATIVISTIC AU+AU COLLISIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEUS COLLISIONS; ENERGY AB Event shapes for Au + Au collisions at 11.4 GeV/c per nucleon were studied over nearly the fun solid angle with the E877 apparatus. The analysis was performed by Fourier expansion of azimuthal distributions of the transverse energy (E(T)) measured in different pseudorapidity intervals. For semicentral collisions a pronounced event anisotropy is identified with a clear forward-backward anticorrelation. In the forward pseudorapidity interval up to 9% of the E(T) is in a directed component. The signal decreases for peripheral and very central collisions. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. GESELL SCHWERIONENFORSCH MBH,W-6100 DARMSTADT,GERMANY. IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83402. UNIV PITTSBURGH,PITTSBURGH,PA 15260. SUNY STONY BROOK,STONY BROOK,NY 11794. UNIV SAO PAULO,BR-05508 SAO PAULO,BRAZIL. WAYNE STATE UNIV,DETROIT,MI 48202. RP BARRETTE, J (reprint author), MCGILL UNIV,MONTREAL,PQ,CANADA. RI Takai, Helio/C-3301-2012; Voloshin, Sergei/I-4122-2013; OI Takai, Helio/0000-0001-9253-8307; Sonnadara, Upul/0000-0001-7862-2537 NR 20 TC 146 Z9 147 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 NOV 7 PY 1994 VL 73 IS 19 BP 2532 EP 2535 DI 10.1103/PhysRevLett.73.2532 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ156 UT WOS:A1994PQ15600006 ER PT J AU SMITH, AG PHILLIPS, WR DURELL, JL URBAN, W VARLEY, BJ PEARSON, CJ SHANNON, JA AHMAD, I LISTER, CJ MORSS, LR NASH, KL WILLIAMS, CW BENTALEB, M LUBKIEWICZ, E SCHULZ, N AF SMITH, AG PHILLIPS, WR DURELL, JL URBAN, W VARLEY, BJ PEARSON, CJ SHANNON, JA AHMAD, I LISTER, CJ MORSS, LR NASH, KL WILLIAMS, CW BENTALEB, M LUBKIEWICZ, E SCHULZ, N TI LIFETIMES IN NEUTRON-RICH ND ISOTOPES MEASURED BY A DOPPLER PROFILE METHOD SO PHYSICAL REVIEW LETTERS LA English DT Article ID FISSION; BANDS; REGION; CF-252 AB The Eurogam-1 array has been used to study gamma rays emitted following the spontaneous fission of a Cm-248 source. Yrast level schemes for the neutron-rich nuclei Nd-152,Nd-154,Nd-156 have been constructed. The stopping of the Nd fragments in the source material leads to Doppler-broadened line shapes for those states that have Lifetimes comparable to the stopping time. This paper describes the first measurements of lifetimes of medium-spin states in very neutron-rich nuclei obtained from the analysis of these line shapes. The transition quadrupole moments for the yrast states in the spin range (10-16)h have been deduced to be 5.88 +/- 0.08 e b (Nd-152), 5.75 +/- 0.10 e b (Nd-154), and 5.33 +/- 0.16 e b (Nd-156). C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV STRASBOURG 1,INST NATL PHYS NUCL & PHYS PARTICULES,CNRS,F-67037 STRASBOURG,FRANCE. RP SMITH, AG (reprint author), UNIV MANCHESTER,DEPT PHYS & ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 10 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 NOV 7 PY 1994 VL 73 IS 19 BP 2540 EP 2542 DI 10.1103/PhysRevLett.73.2540 PG 3 WC Physics, Multidisciplinary SC Physics GA PQ156 UT WOS:A1994PQ15600008 ER PT J AU WEN, JM CHANG, SL BURNETT, JW EVANS, JW THIEL, PA AF WEN, JM CHANG, SL BURNETT, JW EVANS, JW THIEL, PA TI DIFFUSION OF LARGE 2-DIMENSIONAL AG CLUSTERS ON AG(1OO) SO PHYSICAL REVIEW LETTERS LA English DT Article ID TUNNELING MICROSCOPY; BROWNIAN MIGRATION; SURFACE; CRYSTALLITES; TEMPERATURE; BEHAVIOR; MOBILITY; DYNAMICS; RH(100); EPITAXY AB Scanning tunneling microscopy shows that large two-dimensional Ag clusters on Ag(100) can diffuse. The value of the diffusion coefficient at room temperature is of order 10(-17) cm(2) s(-1) and varies little, if at all, with cluster size in the range studied, 100 to 720 atoms per cluster. This weak variation rules out periphery diffusion as the main mechanism of cluster diffusion, suggesting instead two-dimensional evaporation-condensation. This conclusion is compatible with the energetics of atomic-scale events within the cluster and with the dissolution of small clusters observed at low coverages. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MATH,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP WEN, JM (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 22 TC 269 Z9 280 U1 1 U2 18 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD NOV 7 PY 1994 VL 73 IS 19 BP 2591 EP 2594 DI 10.1103/PhysRevLett.73.2591 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ156 UT WOS:A1994PQ15600021 ER PT J AU KWOK, WK FENDRICH, JA VANDERBEEK, CJ CRABTREE, GW AF KWOK, WK FENDRICH, JA VANDERBEEK, CJ CRABTREE, GW TI PEAK EFFECT AS A PRECURSOR TO VORTEX LATTICE MELTING IN SINGLE-CRYSTAL YBA2CU3O7-DELTA SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; ABRIKOSOV FLUX LATTICE; FORCE AB We present direct evidence of a ''peak effect'' as a precursor to vortex lattice melting in a single crystal of YBa2CU3O7-delta containing only two twin planes. The peak effect occurs just below the vortex liquid to solid phase transition in a narrow field region between 0.3 and 1.5 T for H parallel to c and is clearly observed as a function of both magnetic field and temperature. We demonstrate that the peak effect is due to enhanced vortex pinning by the twin boundaries, indicative of lattice softening prior to melting. In addition, we show evidence for a non-Ohmic behavior in the vortex liquid state due to depinning of the vortices from the two twin boundaries with increasing Lorentz force. C1 ARGONNE NATL LAB, SCI & TECHNOL CTR SUPERCONDUCTIV, ARGONNE, IL 60439 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS & ASTRON, AMES, IA 50011 USA. RP KWOK, WK (reprint author), ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. NR 25 TC 176 Z9 176 U1 0 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 NOV 7 PY 1994 VL 73 IS 19 BP 2614 EP 2617 DI 10.1103/PhysRevLett.73.2614 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ156 UT WOS:A1994PQ15600027 ER PT J AU ECCLESTON, RS BARNES, T BRODY, J JOHNSON, JW AF ECCLESTON, RS BARNES, T BRODY, J JOHNSON, JW TI INELASTIC NEUTRON-SCATTERING FROM THE SPIN LADDER COMPOUND (VO)(2)P2O7 SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIMENSIONAL HEISENBERG-ANTIFERROMAGNET; HALDANE GAP; HOMOLOGOUS SERIES; MALEIC-ANHYDRIDE; COPPER(II); (VO)2P2O7; DYNAMICS; MODEL; STATE AB We present results from an inelastic neutron scattering experiment on the candidate Heisenberg spin ladder vanadyl pyrophosphate, (VO)(2)P2O7 We find evidence for a spin-wave excitation gap of E(gap) = 3.7 +/- 0.2 meV at a band minimum near Q = 0.8 Angstrom(-1). This is consistent with expectations for triplet spin waves in (VO)(2)P2O7 in the spin-ladder model and represents the first confirmation in nature of a Heisenberg antiferromagnetic spin ladder. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. EXXON RES & ENGN CO,CORP RES LABS,ANNANDALE,NJ 08801. RP ECCLESTON, RS (reprint author), RUTHERFORD APPLETON LAB,ISIS FACIL,DIDCOT OX11 0QX,OXON,ENGLAND. NR 38 TC 145 Z9 145 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 NOV 7 PY 1994 VL 73 IS 19 BP 2626 EP 2629 DI 10.1103/PhysRevLett.73.2626 PG 4 WC Physics, Multidisciplinary SC Physics GA PQ156 UT WOS:A1994PQ15600030 ER PT J AU COOPER, F SHEPARD, H AF COOPER, F SHEPARD, H TI SOLITONS IN THE CAMASSA-HOLM SHALLOW-WATER EQUATION SO PHYSICS LETTERS A LA English DT Article AB We study the class of shallow water equations of Camassa and Hold derived from the Lagrangian, L = integral[1/2(phi(xxxx)-phi(x))phi(t)-1/2(phi(x))3 - 1/2phi(x)(phi(xx))2 - 1/2kappaphi(x)2] dx, using a variational approach. This class contains ''peakons'' for kappa = 0, which are solitons whose peaks have a discontinuous first derivative. We derive approximate solitary wave solutions to this class of equations using trial variational functions of the form u(x, t) = phi(x) = A(t) exp[-beta(t)\x - q(t)\2n] in a time-dependent variational calculation. For the case kappa = 0 we obtain the exact answer. For kappa not-equal-to 0 we obtain the optimal variational solution. For the variational solution having fixed conserved momentum P = integral1/2(u2 + u(x)2) dx, the soliton's scaled amplitude, A/P1/2, and velocity, q/P1/2, depend only on the variable z=kappa/square-root P. We prove that these scaling relations are true for the exact soliton solutions to the Camassa-Holm equation. C1 UNIV NEW HAMPSHIRE,DEPT PHYS,DURHAM,NH 03824. RP COOPER, F (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 6 TC 51 Z9 58 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 NOV 7 PY 1994 VL 194 IS 4 BP 246 EP 250 DI 10.1016/0375-9601(94)91246-7 PG 5 WC Physics, Multidisciplinary SC Physics GA PP798 UT WOS:A1994PP79800003 ER PT J AU BERMAN, G BULGAKOV, E HOLM, D KLUGER, Y AF BERMAN, G BULGAKOV, E HOLM, D KLUGER, Y TI DYNAMICAL CHAOS IN SU(2) CIRCLE-TIMES-U (1) THEORY SO PHYSICS LETTERS A LA English DT Article ID GAUGE-THEORY; SYSTEMS; FIELDS AB We study the dynamics of the classical homogeneous SU(2) x U(1) gauge theory in the spontaneously broken phase. A transition from regular to chaotic dynamics is shown to occur for energy densities epsilon > 0.3m(w)2/G(F) almost-equal-to 2 x 10(10) GeV/fm3. The regular regime is characterized by a sharp frequency spectrum for the Yang-Mills fields. The frequency spectrum in the chaotic regime is continuous and the sharp frequency lines of the regular regime are dispersed. In the early universe or at high energy densities in a Yang-Mills plasma this transition may have observable effects that can be studied by analyzing the frequency spectrum and the time correlation functions. In the chaotic regime these time correlation functions decay considerably faster than in the regular regime. C1 KIRENSKY PHYS INST,KRASNOYARSK 660036,RUSSIA. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP BERMAN, G (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545, USA. NR 26 TC 7 Z9 7 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 NOV 7 PY 1994 VL 194 IS 4 BP 251 EP 264 DI 10.1016/0375-9601(94)91247-5 PG 14 WC Physics, Multidisciplinary SC Physics GA PP798 UT WOS:A1994PP79800004 ER PT J AU ZHANG, ZY KUO, SC KLEMM, RB MONKS, PS STIEF, LJ AF ZHANG, ZY KUO, SC KLEMM, RB MONKS, PS STIEF, LJ TI A DISCHARGE FLOW-PHOTOIONIZATION MASS-SPECTROMETRIC STUDY OF THE FO(X(2)PI(I)) RADICAL - PHOTOIONIZATION EFFICIENCY SPECTRUM AND IONIZATION-ENERGY SO CHEMICAL PHYSICS LETTERS LA English DT Article ID GAS-PHASE; CONSTANTS AB Photoionization efficiency spectra of FO were measured over the wavelength range 80.0-100.0 nm and in the ionization threshold region, 94.0-100.0 nm, using a discharge flow-photoionization mass spectrometer apparatus coupled to a synchrotron radiation source. FO was generated by the reaction of F(P-2) atoms with NO3 and via a F-2/O-2 discharge. A value of 12.78 +/- 0.03 eV was obtained for the adiabatic ionization energy of FO from photoion thresholds which corresponds to FO+(X(3) Sigma(-))<-- FO(X(2) Pi(i)). These results, which are the first to be obtained by direct PIMS measurements, corroborate those of a photoelectron spectroscopy study; however, the ionization energy determined here is free from interferences due to other species which complicated the PES measurement. A value of 109.5 +/- 8.0 kJ mol(-1) for Delta(f)H(298)(0) (FO) is computed from the present value of IE(FO) and a previous appearance energy measurement, and a value for the proton affinity of FO is calculated to be 511.5 +/- 10.0 kJ mol(-1) C1 NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,GREENBELT,MD 20771. RP ZHANG, ZY (reprint author), BROOKHAVEN NATL LAB,BLDG 815,POB 5000,UPTON,NY 11973, USA. RI Monks, Paul/H-6468-2016 OI Monks, Paul/0000-0001-9984-4390 NR 28 TC 16 Z9 16 U1 0 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 NOV 4 PY 1994 VL 229 IS 4-5 BP 377 EP 382 DI 10.1016/0009-2614(94)01064-1 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PP736 UT WOS:A1994PP73600008 ER PT J AU WERST, DW PIOCOS, EA TARTAKOVSKY, EE TRIFUNAC, AD AF WERST, DW PIOCOS, EA TARTAKOVSKY, EE TRIFUNAC, AD TI DEPROTONATION OF HYDROCARBON RADICAL CATIONS IN ZEOLITES SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ION MOLECULE REACTIONS; ESR EVIDENCE; MATRIX; QUADRICYCLANE; NORBORNADIENE; GENERATION; RADIOLYSIS; RESONANCE; CHEMISTRY; ZSM-5 AB Neutral radicals are observed at 77 K following radiolysis of cycloheptatriene and cyclohexane adsorbed on ZSM-5 zeolites. The mechanism of radical formation is assigned to proton transfer from the sorbate radical cations to the zeolite lattice. In the case of cycloheptatriene, the ratio C7H7/C7H8+. increases with the zeolite Al content. Cycloheptatriene adsorbs to at least two types of sites; the more basic sites increase in number as the Al content increases, are lower in energy and are populated first. RP WERST, DW (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 40 TC 15 Z9 15 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 NOV 4 PY 1994 VL 229 IS 4-5 BP 421 EP 428 DI 10.1016/0009-2614(94)01082-X PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PP736 UT WOS:A1994PP73600015 ER PT J AU ROSENTHAL, SJ SCHWARTZ, BJ ROSSKY, PJ AF ROSENTHAL, SJ SCHWARTZ, BJ ROSSKY, PJ TI CALCULATED PHOTON-ECHO SIGNALS FOR THE AQUEOUS SOLVATED ELECTRON - THE ORIGIN OF ULTRAFAST ELECTRONIC DEPHASING SO CHEMICAL PHYSICS LETTERS LA English DT Article ID DYNAMICS; MOLECULES; SPECTROSCOPY; ACETONITRILE; SIMULATION; SOLVENT AB Photon echo and resonant transient grating signals are calculated for the hydrated electron based on the results of quantum molecular dynamics simulations. The echo decays in less than or equal to 15 fs. Comparison to echo calculations for organic probes and different solvent response functions reveals the origin of this ultrafast dephasing. For the strongly coupled hydrated electron, small changes in solvent configuration lead to large fluctuations in the transition frequency causing a rapid loss of electronic coherence, even in the absence of fast inertial solvent motions. In such strongly coupled systems where the echo decay is insensitive to solvation dynamics, the resonant transient grating experiment can provide a measure of the solvent response. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV TEXAS,DEPT CHEM & BIOCHEM,AUSTIN,TX 78712. RP ROSENTHAL, SJ (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. OI Schwartz, Benjamin/0000-0003-3257-9152 NR 35 TC 30 Z9 30 U1 0 U2 2 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 NOV 4 PY 1994 VL 229 IS 4-5 BP 443 EP 448 DI 10.1016/0009-2614(94)01090-0 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PP736 UT WOS:A1994PP73600019 ER PT J AU CAHOON, EB CRANMER, AM SHANKLIN, J OHLROGGE, JB AF CAHOON, EB CRANMER, AM SHANKLIN, J OHLROGGE, JB TI DELTA(6) HEXADECENOIC ACID IS SYNTHESIZED BY THE ACTIVITY OF A SOLUBLE DELTA(6) PALMITOYL-ACYL CARRIER PROTEIN DESATURASE IN THUNBERGIA-ALATA ENDOSPERM SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID NUCLEOTIDE-SEQUENCE; HIGHER-PLANTS; CDNA CLONE; SEED; FERREDOXIN; EXPRESSION; SAFFLOWER; PRECURSOR; RNA AB Delta(6) Hexadecenoic acid (16:1 Delta(6)) composes more than 80% of the seed oil of Thunbergia alata. Studies were conducted to determine the biosynthetic origin of the double bond of this unusual fatty acid. Assays of fractions of developing T. alata seed endosperm with [1-C-14]palmitoyl (16:0)-acyl carrier protein (ACP) revealed the presence of a soluble Delta(6) desaturase activity. This activity was greatest when 16:0-ACP was provided as a substrate, whereas no desaturation of the coenzyme A ester of this fatty acid was detected. In addition, Delta(6)16:0-ACP desaturase activity in T. alata endosperm extracts was dependent on the presence of ferredoxin and molecular oxygen and was stimulated by catalase. To further characterize this enzyme, a cDNA encoding a diverged acyl-ACP desaturase was isolated from a T. alata endosperm cDNA library using polymerase chain reaction with degenerate oligonucleotides corresponding to conserved amino acid sequences in Delta(9)stearoyl (18:0) and Delta(4)16:0-ACP desaturases. The primary structure of the mature peptide encoded by this cDNA shares 66% identity with the mature castor Delta(9)18:0-ACP desaturase and 57% identity with the mature coriander Delta(4)16:0-ACP desaturase. Extracts of Escherichia coli that express the T. alata cDNA catalyzed the Delta(6) desaturation of 16:0-ACP. These results demonstrate that 16:1 Delta(6) in T. alata endosperm is formed by the activity of a soluble Delta(6)16:0-ACP desaturase that is structurally related to the Delta(9)18:0- and Delta(4)16:0-ACP desaturases. Implications of this work to an understanding of active site structures of acyl-ACP desaturases are discussed. C1 MICHIGAN STATE UNIV,DEPT BOT & PLANT PATHOL,E LANSING,MI 48824. CALGENE INC,DAVIS,CA 95616. RP CAHOON, EB (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,BLDG 463,UPTON,NY 11973, USA. NR 44 TC 58 Z9 64 U1 0 U2 5 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 NOV 4 PY 1994 VL 269 IS 44 BP 27519 EP 27526 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PV771 UT WOS:A1994PV77100057 PM 7961667 ER PT J AU RODRIGUEZ, JA KUHN, M AF RODRIGUEZ, JA KUHN, M TI ELECTRONIC-PROPERTIES AND CHEMICAL-PROPERTIES OF AG/PT(111) AND CU/PT(111) SURFACES - IMPORTANCE OF CHANGES IN THE D-ELECTRON POPULATIONS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter ID EFFECTIVE CORE POTENTIALS; BIMETALLIC SURFACES; MOLECULAR CALCULATIONS; CHARGE REDISTRIBUTION; ACCEPTOR INTERACTIONS; THERMAL-DESORPTION; CRYSTAL-SURFACES; AU FILMS; THIN CU; AG AB The electronic interactions in Ag/Pt(111) and Cu/Pt(111) have been examined using X-ray photoelectron spectroscopy and ab initio MO-SCF calculations on cluster models. Ag and Cu atoms bonded to Pt(111) exhibit core-level binding energies that are smaller than those of bulk Ag or Cu. The negative core-level shifts correlate with an increase in the ability of the noble metals to adsorb CO. These electronic and chemical perturbations reflect the effects of a Pt-induced increase in the Cu 3d and Ag 4d electron populations. The behavior seen for Cu and Ag on Pt(111) is opposite to that found on early transition metals, where there is a decrease in the d electron populations of Cu and Ag with positive core-level shifts for the noble metals. RP RODRIGUEZ, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 67 TC 67 Z9 67 U1 2 U2 10 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 NOV 3 PY 1994 VL 98 IS 44 BP 11251 EP 11255 DI 10.1021/j100095a004 PG 5 WC Chemistry, Physical SC Chemistry GA PP894 UT WOS:A1994PP89400004 ER PT J AU GIBSON, JK AF GIBSON, JK TI LANTHANIDE OXIDE CLUSTER IONS GENERATED BY VACUUM LASER-ABLATION - METAL VALENCE EFFECTS ON CLUSTER COMPOSITIONS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID RARE-EARTH CLUSTERS; THIN-FILMS; REFRACTORY MATERIALS; VAPORIZATION; EVAPORATION; GRAPHITE; ENERGIES AB Pulsed XeCl excimer laser ablation (lambda = 308 nm; irradiance approximate to 10 MW cm(-2)) of hydrated lanthanide oxalates into vacuum has been found to generate significant yields of lanthanide oxide cluster ions, the compositions of which were analyzed by reflectron time-of-night mass spectrometry. Cluster ions, Ln(m)O(n)(+) were identified for all of the lanthanides studied: Ln = Sm, Eu, Gd, Tb, and Yb. In each case, ions with metal contents (m) of up to at least 26 were detected, with the largest cluster identified being Tb63O94+ (mass = 11 516 amu). A distinctive sequence of cluster compositions was found for each Ln, apparently reflecting the relative accessibilities of the +2, +3, and +4 oxidation states. On the basis of the observed cluster stoichiometry distributions, it was concluded that trivalent metal sites were dominant in each series of Ln(m)O(n)+. However, divalent Eu sites were ubiquitous, and tetravalent Tb sites were also assigned. In addition, more metal-rich cluster ions were identified for Sm and Gd. A double-chain polymeric lanthanide oxide schematic structure is postulated to provide a coherent picture of the observed clustering behaviors. RP GIBSON, JK (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. NR 40 TC 39 Z9 39 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 NOV 3 PY 1994 VL 98 IS 44 BP 11321 EP 11330 DI 10.1021/j100095a014 PG 10 WC Chemistry, Physical SC Chemistry GA PP894 UT WOS:A1994PP89400014 ER PT J AU STUART, BC CAMERON, SM POWELL, HT AF STUART, BC CAMERON, SM POWELL, HT TI PRODUCTION, EXCITATION, AND LASER DYNAMICS OF SULFUR MONOXIDE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID GRADE FUSED-SILICA; 193 NM; INTENSITY FACTORS; THIONYL CHLORIDE; EXCITED-STATES; RATE CONSTANTS; HIGH-POWER; SPECTROSCOPY; PHOTODISSOCIATION; IRRADIATION AB We have investigated the kinetics of excitation and lasing of the free radical SO by rotationally-resolved optical pumping near 250 nm with a continuously-tunable, narrow-line width KrF laser. Longitudinal photodissociation of SO2 by a 193-nm ArF excimer laser produced SO(X(3) Sigma(-)) concentrations close to 10(16) cm(-3) over a 50-cm length. Pumping of SO(B-3 Sigma(-)) by the KrF laser occurred from the v''=2 ground state cm vibrational level which was preferentially produced by photodissociation. The fraction of ground state population that could be excited to SO(B) was determined by measuring the saturation fluence for excitation as a function of buffer gas pressure and comparing with a simple model. Addition of a buffer gas increased excitation by nearly 30 times due to increased rotational mixing in the ground electronic state. Lasing was demonstrated on six new vibrational bands of fully-allowed SO(B-X) band in the region 262-315 nm. A small-signal gain coefficient of 0.11 cm(-1) and pulse energy of 11 mu J were achieved on the 270-nm SO-(B,v'=2-->X,v''=5) laser transition. A full computational rate equation model of the excitation and lasing dynamics, including collisional rotational mixing, was developed. The A(3) Pi electronic state of SO was also investigated as a possible ultraviolet energy storage laser medium. Excitation of SO(A(3) Pi,v'=5,6) near 250 nm was achieved after a time delay from photodissociation to allow for vibrational relaxation into SO(X,v''=0). Measurements of the radiative lifetime, deactivation rate, and saturation fluence, along with computation modeling, indicate that a storage laser based on the weak SO(A,v'=0-->X,v''=4) transition is not feasible with our production and excitation capabilities. Lasing on a direct-pumped single rotational transition of the SO(A,v'=5-->X,v''=1) band may be possible, but with very limited capacity to store energy. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP STUART, BC (reprint author), UNIV CALIF DAVIS,POB 808,L-443,LIVERMORE,CA 94550, USA. RI Stuart, Brent/K-4988-2015 NR 57 TC 12 Z9 12 U1 1 U2 6 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 NOV 3 PY 1994 VL 98 IS 44 BP 11499 EP 11511 DI 10.1021/j100095a035 PG 13 WC Chemistry, Physical SC Chemistry GA PP894 UT WOS:A1994PP89400035 ER PT J AU LARSEN, SC AYLOR, A BELL, AT REIMER, JA AF LARSEN, SC AYLOR, A BELL, AT REIMER, JA TI ELECTRON-PARAMAGNETIC-RESONANCE STUDIES OF COPPER ION-EXCHANGED ZSM-5 SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SPIN ECHO MODULATION; NITROGEN MONOXIDE; NO DECOMPOSITION; NITRIC-OXIDE; ZEOLITES; CU-ZSM-5; CU; CATALYSTS; CU-2+; SPECTROSCOPY AB Electron paramagnetic resonance (EPR) spectroscopy was utilized to probe the oxidation state and coordination environment of copper in ion-exchanged CuZSM-5. EPR spectra of hydrated samples were consistent with octahedral coordination. Square-pyramidal and square-planar sites were identified in pretreated CuZSM-5 samples, and the relative concentration of square-pyramidal sites in these samples was linearly correlated with the copper-exchange level. The extent of autoreduction was monitored by EPR and it was determined that a substantial fraction (similar to 40-60%) of the copper was reduced and that the reduction process was reversible in the presence of water. A mechanism for the autoreduction of copper is proposed that is consistent with the EPR results. Further, the reactivity of the proposed copper species was probed in reducing and oxidizing environments and in the presence of nitric oxide. The increase in EPR signal intensity that was observed after room-temperature NO exposure of pretreated and oxidized CuZSM-5 is attributed to the formation of copper nitrite and nitrate species. High-temperature in situ EPR experiments revealed that on the time scale of the EPR experiment, the paramagnetic copper environment did not change at elevated temperatures in the presence of nitric oxide. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. OI Bell, Alexis/0000-0002-5738-4645 NR 40 TC 245 Z9 253 U1 5 U2 43 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 NOV 3 PY 1994 VL 98 IS 44 BP 11533 EP 11540 DI 10.1021/j100095a039 PG 8 WC Chemistry, Physical SC Chemistry GA PP894 UT WOS:A1994PP89400039 ER PT J AU ANCHELL, JL GLENDENING, ED AF ANCHELL, JL GLENDENING, ED TI NATURAL BOND ORBITAL ANALYSIS OF THE INTERACTION OF H-2 WITH MGO AND LIMGO CLUSTERS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID LI-DOPED MGO; MAGNESIUM-OXIDE; OXIDATIVE DIMERIZATION; HYDROGEN ABSTRACTION; ELECTRONIC-STRUCTURE; METHANE; ADSORPTION; SURFACE; ABINITIO; DECOMPOSITION AB Many interesting phenomena have been observed regarding the mechanism of adsorbate interactions with MgO and Li-doped MgO. This investigation seeks theoretical explanations for several of these phenomena using ab initio methods and the natural bond orbital approach with H-2 as a probe molecule on small MgO and Li/MgO clusters. We find that electrostatic effects largely determine the preference of H-2 chemidissociation at low-coordinated sites and account for the positive cooperativity calculated for multiple dissociation events at neighboring surface sites. We also find that charge transfer and polarization determine the accessibility of a particular dissociation channel on MgO and Li/MgO. The H-2 probe molecule acts simultaneously as an electron acceptor and donor along those pathways having low activation barriers. Li-doping enhances the catalytic activity of MgO by creating O- centers that strengthen donor-acceptor interactions with H-2. RP ANCHELL, JL (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 34 TC 8 Z9 8 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 NOV 3 PY 1994 VL 98 IS 44 BP 11582 EP 11587 DI 10.1021/j100095a046 PG 6 WC Chemistry, Physical SC Chemistry GA PP894 UT WOS:A1994PP89400046 ER PT J AU DERRICK, M KRAKAUER, D MAGILL, S MUSGRAVE, B REPOND, J SCHLERETH, J STANEK, R TALAGA, RL THRON, J ARZARELLO, F AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G FRASCONI, F GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G MACCARRONE, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F POLINI, A SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A CRITTENDEN, J DESCH, K DIEKMANN, B DOEKER, T FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HARTMANN, H HAUN, D HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C SCHATTEVOY, R SCHNEIDER, JL SCHRAMM, D STAMM, J WEDEMEYER, R CAMPBELLROBSON, S CASSIDY, A DYCE, N FOSTER, B GEORGE, S GILMORE, R HEATH, GP HEATH, HF LLEWELLYN, TJ MORGADO, CJS NORMAN, DJP OMARA, JA TAPPER, RJ WILSON, S YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A GIALAS, I PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B ESKREYS, K JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KEDZIERSKI, T KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BIENLEIN, JK BOTTCHER, S COLDEWEY, C DREWS, G FLASINSKI, M GILKINSON, DJ GOTTLICHER, P GUTJAHR, B HAAS, T HAGGE, L HAIN, W HASELL, D HESSLING, H HULTSCHIG, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H KROGER, W KRUGER, J LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C GRABOSCH, HJ LEICH, A MEYER, A RETHFELDT, C SCHLENSTEDT, S BARBAGLI, G PELFER, P ANZIVINO, G DEPASQUALE, S QIAN, S VOTANO, L BAMBERGER, A FREIDHOF, A POSER, T SOLDNERREMBOLD, S THEISEN, G TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, I FORBES, JR JAMIESON, VA RAINE, C SAXON, DH STAVRIANAKOU, M WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D KAMMERLOCHER, H KREBS, B NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD FURTJES, A LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W TERRON, J ZETSCHE, F BACON, TC BEUSELINCK, R BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM KIM, CO KIM, TY NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L DELPESO, J PUGA, J DETROCONIZ, JF IKRAIAM, F MAYER, JK SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG MITCHELL, JW PATEL, PM SINCLAIR, LE STAIRS, DG STLAURENT, M ULLMANN, R BASHKIROV, V DOLGOSHEIN, BA STIFUTKIN, A BASHINDZHAGYAN, GL ERMOLOV, PF GLADILIN, LK GOLUBKOV, YA KOBRIN, VD KUZMIN, VA PROSKURYAKOV, AS SAVIN, AA SHCHEGLOVA, LM SOLOMIN, AN ZOTOV, NP BENTVELSEV, S BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEJONG, P DEKAMPS, M KOOIJMAN, P KRUSE, A ODELL, V TENNE, RA TIECKE, H VERKERKE, W VREESWIJK, M WIGGERS, L DEWOLF, E VANWOUDENBERG, R ACOSTA, D BYLSMA, B DURKIN, LS HONSCHEID, K LI, C LING, TY MCLEAN, KW MURRAY, WN PARK, IH ROMANOWSKI, TA SEIDLEIN, R BAILEY, DS BLAIR, GA BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DANIELS, D DEVENISH, RCE HARNEW, N LANCASTER, M LUFFMAN, PE MCFALL, J NATH, C QUADT, A UIJTERWAAL, H WALCZAK, R WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U GASPARINI, F LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G IORI, M MARINI, G MATTIOLI, M NIGRO, A HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E CARTIGLIA, N DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ WALENTA, AH ZECH, G ABRAMOWICZ, H DAGAN, S LEVY, A HASEGAWA, T HAZUZMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAGIRA, T NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAGAYAMA, S NAKAMITSU, Y CIRIO, R COSTA, M FERRERO, MI LAMBERTI, L MASELLI, S PERONI, C SACCHI, R SOLANO, A STAIANO, A DARDO, M BAILEY, DC BANDYOPADHYAY, D BENARD, F BRKIC, M CROMBIE, MB GINGRICH, DM HARTNER, GF JOO, KK LEVMAN, GM MARTIN, JF ORR, RS SAMPSON, CR TEUSCHER, RJ CATTERALL, CD JONES, TW KAZIEWICZ, PB LANE, JB SAUNDERS, RS SHULMAN, J BLANKENSHIP, K KOCHOCKI, J LU, B MO, LW BOGUSZ, W CHARCHULA, K 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 EISENBERG, Y GLASMAN, C KARSHON, U REVEL, D SHAPIRA, A ALI, I BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERSTEIN, S SMITH, WH TSURUGAI, T BHADRA, S FRISKEN, WR FURUTANI, KM AF DERRICK, M KRAKAUER, D MAGILL, S MUSGRAVE, B REPOND, J SCHLERETH, J STANEK, R TALAGA, RL THRON, J ARZARELLO, F AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G FRASCONI, F GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G MACCARRONE, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F POLINI, A SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A CRITTENDEN, J DESCH, K DIEKMANN, B DOEKER, T FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HARTMANN, H HAUN, D HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C SCHATTEVOY, R SCHNEIDER, JL SCHRAMM, D STAMM, J WEDEMEYER, R CAMPBELLROBSON, S CASSIDY, A DYCE, N FOSTER, B GEORGE, S GILMORE, R HEATH, GP HEATH, HF LLEWELLYN, TJ MORGADO, CJS NORMAN, DJP OMARA, JA TAPPER, RJ WILSON, S YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A GIALAS, I PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B ESKREYS, K JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KEDZIERSKI, T KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BIENLEIN, JK BOTTCHER, S COLDEWEY, C DREWS, G FLASINSKI, M GILKINSON, DJ GOTTLICHER, P GUTJAHR, B HAAS, T HAGGE, L HAIN, W HASELL, D HESSLING, H HULTSCHIG, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H KROGER, W KRUGER, J LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C GRABOSCH, HJ LEICH, A MEYER, A RETHFELDT, C SCHLENSTEDT, S BARBAGLI, G PELFER, P ANZIVINO, G DEPASQUALE, S QIAN, S VOTANO, L BAMBERGER, A FREIDHOF, A POSER, T SOLDNERREMBOLD, S THEISEN, G TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, I FORBES, JR JAMIESON, VA RAINE, C SAXON, DH STAVRIANAKOU, M WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D KAMMERLOCHER, H KREBS, B NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD FURTJES, A LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W TERRON, J ZETSCHE, F BACON, TC BEUSELINCK, R BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM KIM, CO KIM, TY NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L DELPESO, J PUGA, J DETROCONIZ, JF IKRAIAM, F MAYER, JK SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG MITCHELL, JW PATEL, PM SINCLAIR, LE STAIRS, DG STLAURENT, M ULLMANN, R BASHKIROV, V DOLGOSHEIN, BA STIFUTKIN, A BASHINDZHAGYAN, GL ERMOLOV, PF GLADILIN, LK GOLUBKOV, YA KOBRIN, VD KUZMIN, VA PROSKURYAKOV, AS SAVIN, AA SHCHEGLOVA, LM SOLOMIN, AN ZOTOV, NP BENTVELSEV, S BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEJONG, P DEKAMPS, M KOOIJMAN, P KRUSE, A ODELL, V TENNE, RA TIECKE, H VERKERKE, W VREESWIJK, M WIGGERS, L DEWOLF, E VANWOUDENBERG, R ACOSTA, D BYLSMA, B DURKIN, LS HONSCHEID, K LI, C LING, TY MCLEAN, KW MURRAY, WN PARK, IH ROMANOWSKI, TA SEIDLEIN, R BAILEY, DS BLAIR, GA BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DANIELS, D DEVENISH, RCE HARNEW, N LANCASTER, M LUFFMAN, PE MCFALL, J NATH, C QUADT, A UIJTERWAAL, H WALCZAK, R WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U GASPARINI, F LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G IORI, M MARINI, G MATTIOLI, M NIGRO, A HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E CARTIGLIA, N DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ WALENTA, AH ZECH, G ABRAMOWICZ, H DAGAN, S LEVY, A HASEGAWA, T HAZUZMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAGIRA, T NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAGAYAMA, S NAKAMITSU, Y CIRIO, R COSTA, M FERRERO, MI LAMBERTI, L MASELLI, S PERONI, C SACCHI, R SOLANO, A STAIANO, A DARDO, M BAILEY, DC BANDYOPADHYAY, D BENARD, F BRKIC, M CROMBIE, MB GINGRICH, DM HARTNER, GF JOO, KK LEVMAN, GM MARTIN, JF ORR, RS SAMPSON, CR TEUSCHER, RJ CATTERALL, CD JONES, TW KAZIEWICZ, PB LANE, JB SAUNDERS, RS SHULMAN, J BLANKENSHIP, K KOCHOCKI, J LU, B MO, LW BOGUSZ, W CHARCHULA, K 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 EISENBERG, Y GLASMAN, C KARSHON, U REVEL, D SHAPIRA, A ALI, I BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERSTEIN, S SMITH, WH TSURUGAI, T BHADRA, S FRISKEN, WR FURUTANI, KM TI COMPARISON OF ENERGY FLOWS IN DEEP-INELASTIC SCATTERING EVENTS WITH AND WITHOUT A LARGE RAPIDITY GAP SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; QCD; CALORIMETER; PARTON; ZEUS; DISTRIBUTIONS; SIMULATION; MODEL AB Energy flows in deep inelastic electron-proton scattering are investigated at a center-of-mass energy of 296 GeV for the range Q2 greater-than-or-equal-to 10 GeV2 using the ZEUS detector. A comparison is made between events with and without a large rapidity gap between the hadronic system and the proton direction. The energy flows, corrected for detector acceptance and resolution, are shown for these two classes of events in both the HERA laboratory frame and the Breit frame. From the differences in the shapes of these energy flows we conclude that QCD radiation is suppressed in the large-rapidity-gap events compared to the events without a large rapidity gap. C1 UNIV PADUA,DIPARTIMENTO FIS,I-35100 PADUA,ITALY. PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802. UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. JAGIELLONIAN UNIV,DEPT PHYS,PL-31007 KRAKOW,POLAND. DESY,W-2000 HAMBURG 52,GERMANY. UNIV FLORENCE,I-50121 FLORENCE,ITALY. UNIV FREIBURG,FAK PHYS,W-7800 FREIBURG,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV IOWA,DEPT PHYS & ASTRON,IOWA CITY,IA 52242. KOREA UNIV,SEOUL,SOUTH KOREA. UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV CALABRIA,DEPT PHYS,I-87036 RENDE,ITALY. UNIV AUTONOMA MADRID,DEPT FIS TEOR,MADRID 34,SPAIN. UNIV MANITOBA,DEPT PHYS,WINNIPEG R3T 2N2,MANITOBA,CANADA. UNIV AMSTERDAM,AMSTERDAM,NETHERLANDS. OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10124 TURIN,ITALY. UNIV TURIN,FAC SCI 2,I-10124 TURIN,ITALY. UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A1,ONTARIO,CANADA. UNIV BOLOGNA,I-40126 BOLOGNA,ITALY. UNIV BONN,INST PHYS,W-5300 BONN,GERMANY. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. STANISLAW STASZIC UNIV MIN & MET,FAC PHYS & NUCL TECH,PL-30059 KRAKOW,POLAND. UNIV HAMBURG,INST EXP PHYS,W-2000 HAMBURG 13,GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,HIGH ENERGY NUCL PHYS GRP,LONDON SW7 2AZ,ENGLAND. LOUISIANA STATE UNIV,DEPT PHYS & ASTRON,BATON ROUGE,LA 70803. MCGILL UNIV,DEPT PHYS,MONTREAL H3A 2T5,QUEBEC,CANADA. UNIV OXFORD,DEPT PHYS,OXFORD,ENGLAND. UNIV GESAMTHSCH SIEGEN,FACHBEREICH PHYS,W-5900 SIEGEN 21,GERMANY. TEL AVIV UNIV,SCH PHYS,IL-69978 TEL AVIV,ISRAEL. UNIV TOKYO,INST NUCL STUDY,TOKYO 113,JAPAN. TOKYO METROPOLITAN UNIV,DEPT PHYS,TOKYO 158,JAPAN. UNIV LONDON UNIV COLL,DEPT PHYS & ASTRON,LONDON WC1E 6BT,ENGLAND. VIRGINIA POLYTECH INST & STATE UNIV,DEPT PHYS,BLACKSBURG,VA 24061. UNIV WARSAW,INST EXPTL PHYS,PL-00325 WARSAW,POLAND. INFN BOLOGNA,BOLOGNA,ITALY. INFN,COSENZA,ITALY. INFN,FLORENCE,ITALY. INFN,NAZL FRASCATI,FRASCATI,ITALY. FORSCHUNGSZENTRUM JULICH,INST KERNPHYS,JULICH,GERMANY. MOSCOW ENGN PHYS INST,MOSCOW,RUSSIA. MOSCOW MV LOMONOSOV STATE UNIV,INST NUCL PYS,MOSCOW,RUSSIA. NIKHEF,AMSTERDAM,NETHERLANDS. INFN,PADUA,ITALY. INFN,ROME,ITALY. INFN,TURIN,ITALY. INFN,ALESSANDRIA,ITALY. INST NUCL STUDIES,WARSAW,POLAND. MEIJI GAKUIN UNIV,DEPT PHYS,YOKOHAMA,JAPAN. YORK UNIV,DEPT PHYS,N YORK,ON,CANADA. WEIZMANN INST SCI,DEPT NUCL PHYS,IL-76100 REHOVOT,ISRAEL. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. IROE,FLORENCE,ITALY. COLUMBIA UNIV,NEVIS LABS,IRVINGTON,NY. DESY ZEUTHER,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY. RP DERRICK, M (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Frasconi, Franco/K-1068-2016; Graciani Diaz, Ricardo/I-5152-2016; 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; Gladilin, Leonid/B-5226-2011; Morandin, Mauro/A-3308-2016; Solomin, Anatoly/C-3072-2016; Bashkirov, Vladimir/A-4818-2008; De Pasquale, Salvatore/B-9165-2008; Lancaster, Mark/C-1693-2008; Doyle, Anthony/C-5889-2009 OI Frasconi, Franco/0000-0003-4204-6587; Graciani Diaz, Ricardo/0000-0001-7166-5198; Anzivino, Giuseppina/0000-0002-5967-0952; Castellini, Guido/0000-0002-0177-0643; iori, maurizio/0000-0002-6349-0380; Lancaster, Mark/0000-0002-8872-7292; 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; Morandin, Mauro/0000-0003-4708-4240; De Pasquale, Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195 NR 34 TC 46 Z9 46 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 NOV 3 PY 1994 VL 338 IS 4 BP 483 EP 496 DI 10.1016/0370-2693(94)90804-4 PG 14 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PP670 UT WOS:A1994PP67000010 ER PT J AU AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BEYER, R BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M ERDMANN, W EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNE, RD GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WAGENER, M WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZARBOCK, D ZHANG, Z ZIMMER, M ZIMMERMANN, W ZOMER, F ZUBER, K AF AHMED, T AID, S ANDREEV, V ANDRIEU, B APPUHN, RD ARPAGAUS, M BABAEV, A BAEHR, J BAN, J BARANOV, P BARRELET, E BARTEL, W BARTH, M BASSLER, U BECK, HP BEHREND, HJ BELOUSOV, A BERGER, C BERGSTEIN, H BERNARDI, G BERNET, R BERTRANDCOREMANS, G BESANCON, M BEYER, R BIDDULPH, P BIZOT, JC BLOBEL, V BORRAS, K BOTTERWECK, F BOUDRY, V BRAEMER, A BRASSE, F BRAUNSCHWEIG, W BRISSON, V BRUNCKO, D BRUNE, C BUCHHOLZ, R BUNGENER, L BURGER, J BUSSER, FW BUNIATIAN, A BURKE, S BUSCHHORN, G CAMPBELL, AJ CARLI, T CHARLES, F CLARKE, D CLEGG, AB COLOMBO, M CONTRERAS, JG COUGHLAN, JA COURAU, A COUTURES, C COZZIKA, G CRIEGEE, L CUSSANS, DG CVACH, J DAGORET, S DAINTON, JB DANILOV, M DAU, WD DAUM, K DAVID, M DEFFUR, E DELCOURT, B DELBUONO, L DEROECK, A DEWOLF, EA DINEZZA, P DOLLFUS, C DOWELL, JD DREIS, HB DUBOC, J DULLMANN, D DUNGER, O DUHM, H EBERT, J EBERT, TR ECKERLIN, G EFREMENKO, V EGLI, S EHRLICHMANN, H EICHENBERGER, S EICHLER, R EISELE, F EISENHANDLER, E ELLISON, RJ ELSEN, E ERDMANN, M ERDMANN, W EVRARD, E FAVART, L FEDOTOV, A FEEKEN, D FELST, R FELTESSE, J FERENCEI, J FERRAROTTO, F FLAMM, K FLEISCHER, M FLIESER, M FLUGGE, G FOMENKO, A FOMINYKH, B FORBUSH, M FORMANEK, J FOSTER, JM FRANKE, G FRETWURST, E GABATHULER, E GABATHULER, K GAMERDINGER, K GARVEY, J GAYLER, J GEBAUER, M GELLRICH, A GENZEL, H GERHARDS, R GOERLACH, U GOERLICH, L GOGITIDZE, N GOLDBERG, M GOLDNE, RD GONZALEZPINEIRO, B GOODALL, AM GORELOV, I GORITCHEV, P GRAB, C GRASSLER, H GRASSLER, R GREENSHAW, T GRINDHAMMER, G GRUBER, A GRUBER, C HAACK, J HAIDT, D HAJDUK, L HAMON, O HAMPEL, M HANLON, EM HAPKE, M HAYNES, WJ HEATERINGTON, J HEDBERG, V HEINZELMANN, G HENDERSON, RCW HENSCHEL, H HERMA, R HERYNEK, I HESS, MF HILDESHEIM, W HILL, P HILLER, KH HILTON, CD HLADKY, J HOEGER, KC HOPPNER, M HORISBERGER, R HUET, P HUFNAGEL, H IBBOTSON, M ITTERBECK, H JABIOL, MA JACHOLKOWSKA, A JACOBSSON, C JAFFRE, M JANOTH, J JANSEN, T JONSSON, L JOHANNSEN, K JOHNSON, DP JOHNSON, L JUNG, H KALMUS, PIP KANT, D KASCHOWITZ, R KASSELMANN, P KATHAGE, U KAUFMANN, HH KAZARIAN, S KENYON, IR KERMICHE, S KEUKER, C KIESLING, C KLEIN, M KLEINWORT, C KNIES, G KO, W KOHLER, T KOLANOSKI, H KOLE, F KOLYA, SD KORBEL, V KORN, M KOSTKA, P KOTELNIKOV, SK KRASNY, MW KREHBIEL, H KRUCKER, D KRUGER, U KRUNERMARQUIS, U KUBENKA, JP KUSTER, H KUHLEN, M KURCA, T KURZHOFER, J KUZNIK, B LACOUR, D LAMARCHE, F LANDER, R LANDON, MPJ LANGE, W LANIUS, P LAPORTE, JF LEBEDEV, A LEVERENZ, C LEVONIAN, S LEY, C LINDNER, A LINDSTROM, G LINSEL, F LIPINSKI, J LIST, B LOCH, P LOHMANDER, H LOPEZ, GC LUKE, D MAGNUSSEN, N MALINOVSKI, E MANI, S MARACEK, R MARAGE, P MARKS, J MARSHALL, R MARTENS, J MARTIN, R MARTYN, HU MARTYNIAK, J MASSON, S MAVROIDIS, T MAXFIELD, SJ MCMAHON, SJ MEHTA, A MEIER, K MERCER, D MERZ, T MEYER, CA MEYER, H MEYER, J MIKOCKI, S MILSTEAD, D MOREAU, F MORRIS, JV MULLER, G MULLER, K MURIN, P NAGOVIZIN, V NAHNHAUER, R NAROSKA, B NAUMANN, T NEWMAN, PR NEWTON, D NEYRET, D NGUYEN, HK NIEBERGALL, F NIEBUHR, C NISIUS, R NOWAK, G NOYES, GW NYBERGWERTHER, M OBERLACK, H OBROCK, U OLSSON, JE PANARO, E PANITCH, A PASCAUD, C PATEL, GD PEPPEL, E PEREZ, E PHILLIPS, JP PICHLER, C PITZL, D POPE, G PRELL, S PROSI, R RADEL, G RAUPACH, F REIMER, P REINSHAGEN, S RIBARICS, P RIECH, V RIEDLBERGER, J RIESS, S RIETZ, M ROBERTSON, SM ROBMANN, P ROLOFF, HE ROOSEN, R ROSENBAUER, K ROSTOVTSEV, A ROUSE, F ROYON, C RUTER, K RUSAKOV, S RYBICKI, K RYLKO, R SAHLMANN, N SANCHEZ, E SANKEY, DPC SAVITSKY, M SCHACHT, P SCHIEK, S SCHLEPER, P VONSCHLIPPE, W SCHMIDT, C SCHMIDT, D SCHMIDT, G SCHONING, A SCHRODER, V SCHUHMANN, E SCHWAB, B SCHWIND, A SEEHAUSEN, U SEFKOW, F SEIDEL, M SELL, R SEMENOV, A SHEKELYAN, V SHEVIAKOV, I SHOOSHTARI, H SHTARKOV, LN SIEGMON, G SIEWERT, U SIROIS, Y SKILLICORN, IO SMIRNOV, P SMITH, JR SOLOVIEV, Y SPITZER, H STAROSTA, R STEENBOCK, M STEFFEN, P STEINBERG, R STELLA, B STEPHENS, K STIER, J STIEWE, J STOSSLEIN, U STRACHOTA, J STRAUMANN, U STRUCZINSKI, W SUTTON, JP TAPPROGGE, S TAYLOR, RE TCHERNYSHOV, V THIEBAUX, C THOMPSON, G TICHOMIROV, I TRUOL, P TURNAU, J TUTAS, J UELKES, P USIK, A VALKAR, S VALKAROVA, A VALLEE, C VANESCH, P VANMECHELEN, P VARTAPETIAN, A VAZDIK, Y VECKO, M VERRECCHIA, P VILLET, G WACKER, K WAGENER, A WAGENER, M WALKER, IW WALTHER, A WEBER, G WEBER, M WEGENER, D WEGNER, A WELLISCH, HP WEST, LR WILLARD, S WINDE, M WINTER, GG WRIGHT, AE WUNSCH, E WULFF, N YIOU, TP ZACEK, J ZARBOCK, D ZHANG, Z ZIMMER, M ZIMMERMANN, W ZOMER, F ZUBER, K TI PHOTOPRODUCTION OF J/PSI MESONS AT HERA SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; H1 EXPERIMENT; J-PSI; CHAMBER; ENERGY; TRIGGER; REGION AB We present a study of J/psi meson production in collisions of 26.7 GeV electrons with 820 GeV protons, performed with the H1-detector at the HERA collider at DESY. The J/psi mesons are detected via their leptonic decays both to electrons and muons. Requiring exactly two particles in the detector, a cross section of sigma(ep --> J/psiX) = (8.8 +/- 2.2) nb is determined for 30 GeV less-than-or-equal-to W(gammap) less-than-or-equal-to 180 GeV and Q2 less-than-or-similar-to 4 GeV2. Using the flux of quasi-real photons with Q2 less-than-or-similar-to 4 GeV2, a total photoproduction cross section of sigma(gammap --> J/psiX) = (56 +/- 13 +/- 14) nb is derived at an average W(gammap) = 90 GeV. The distribution of the squared momentum transfer t from the proton to the J/psi can be fitted using an exponential exp (-b\t\) elow a \t\ of 0.75 GeV2 yielding a slope parameter of b = (4.7 +/- 1.9) GeV-2. C1 UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. VUB,ULB,INTER UNIV INST HIGH ENERGIES,BRUSSELS,BELGIUM. RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. UNIV DORTMUND,INST PHYS,W-4600 DORTMUND 50,GERMANY. UNIV GLASGOW,DEPT PHYS & ASTRON,GLASGOW G12 8QQ,SCOTLAND. UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. UNIV INSTELLING ANTWERP,B-2610 WILRIJK,BELGIUM. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. UNIV CALIF DAVIS,IIRPA,DAVIS,CA 95616. DESY,W-2000 HAMBURG 52,GERMANY. UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY. CHRISTIAN ALBRECHTS UNIV KIEL,INST REINE & ANGEW KERNPHYS,W-2300 KIEL 1,GERMANY. SLOVAK ACAD SCI,INST EXPTL PHYS,KOSICE,SLOVAKIA. LUND UNIV,DEPT PHYS,S-22101 LUND,SWEDEN. UNIV MANCHESTER,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND. ECOLE POLYTECH,F-91128 PALAISEAU,FRANCE. SWISS FED INST TECHNOL,INST TEILCHENPHYS,CH-8006 ZURICH,SWITZERLAND. UNIV ZURICH,INST PHYS,CH-8006 ZURICH,SWITZERLAND. UNIV HAMBURG,INST EXPTL PHYS 1,W-2000 HAMBURG 13,GERMANY. UNIV HAMBURG,INST EXPTL PHYS,W-2000 HAMBURG 13,GERMANY. UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY. QUEEN MARY & WESTFIELD COLL,LONDON,ENGLAND. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YL,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW,RUSSIA. LEBEDEV PHYS INST,MOSCOW,RUSSIA. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND. UNIV AIX MARSEILLE 2,IN2P3,CNRS,CPPM,F-13007 MARSEILLE,FRANCE. MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY. UNIV PARIS 07,IN2P3,CNRS,CPPM,F-75221 PARIS 05,FRANCE. UNIV PARIS 07,IN2P3,CNRS,F-75221 PARIS 05,FRANCE. UNIV PARIS 11,IN2P3,CNRS,LAL,F-91405 ORSAY,FRANCE. UNIV PARIS 06,LPNHE,F-75005 PARIS,FRANCE. CZECHOSLOVAK ACAD SCI,CS-11142 PRAGUE 1,CZECH REPUBLIC. UNIV ZURICH,INST PHYS,CH-8006 ZURICH,SWITZERLAND. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,INST PHYS,STANFORD,CA 94305. UNIV ROMA LA SAPIENZA,DIPARTIMENTO FIS,I-00185 ROME,ITALY. CHARLES UNIV,CTR NUCL,PRAGUE,CZECH REPUBLIC. INFN ROMA,ROME,ITALY. PAUL SCHERRER INST,VILLIGEN,SWITZERLAND. BERG UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,WUPPERTAL,GERMANY. DESY,INST HOCHENERGIEPHYS,ZEUTHEN,GERMANY. CENS,CEA,DSM,DAPHNIA,F-91190 GIF SUR YVETTE,FRANCE. RP AHMED, T (reprint author), RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. RI Kotelnikov, Sergey/A-9711-2014; Cvach, Jaroslav/G-6269-2014; Sheviakov, Igor/N-2735-2015; Danilov, Mikhail/C-5380-2014; Meyer, Curtis/L-3488-2014; Soloviev, Yury/M-8788-2015; Levonian, Sergey/M-8693-2015; Andreev, Vladimir/M-8665-2015; Fomenko, Alexander/I-7900-2014; Malinovski, Evgenii/N-1034-2015; Gogitidze, Nelli/N-1224-2015; Belousov, Anatoli/N-2102-2015; Vazdik, Iakov/N-2624-2015; Gorelov, Igor/J-9010-2015 OI Kotelnikov, Sergey/0000-0002-8027-4612; Erdmann, Martin/0000-0002-1653-1303; Beck, Hans Peter/0000-0001-7212-1096; Bassler, Ursula/0000-0002-9041-3057; Sheviakov, Igor/0000-0002-1659-3483; Danilov, Mikhail/0000-0001-9227-5164; Meyer, Curtis/0000-0001-7599-3973; Soloviev, Yury/0000-0003-1136-2827; Gorelov, Igor/0000-0001-5570-0133 NR 36 TC 46 Z9 46 U1 1 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 NOV 3 PY 1994 VL 338 IS 4 BP 507 EP 518 DI 10.1016/0370-2693(94)90806-0 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA PP670 UT WOS:A1994PP67000012 ER PT J AU HURLBURT, PK RACK, JJ LUCK, JS DEC, SF WEBB, JD ANDERSON, OP STRAUSS, SH AF HURLBURT, PK RACK, JJ LUCK, JS DEC, SF WEBB, JD ANDERSON, OP STRAUSS, SH TI NONCLASSICAL METAL-CARBONYLS - [AG(CO)](+) AND [AG(CO)(2)](+) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Review ID WEAKLY COORDINATING ANIONS; NUCLEAR MAGNETIC-RESONANCE; NMR-SPECTROSCOPY; INFRARED-SPECTROSCOPY; ISOCYANIDE COMPLEXES; MOLECULAR-STRUCTURES; CRYSTAL-STRUCTURES; REDOX BEHAVIOR; CO ADSORPTION; HIGH-PRESSURE AB The synthesis and characterization of salts of the cationic silver(I) carbonyl complexes [Ag(CO)](+) and [Ag(CO)(2)](+) are reported. The counterions used include OTeF5- and the weakly coordinating anions B(OTeF5)(4-), Zn(OTeF5)(4)(2-), Nb(OTeF5)(6-), and Ti(OTeF5)(6)(2-). Despite the fact that carbon monoxide is reversibly bound to silver(I), these compounds are stable enough to be isolated as crystalline solids under a CO atmosphere or at low temperatures. Two of the new compounds, [Ag(CO)][B(OTeF5)(4)] and [Ag(CO)(2)][B(OTeF5)(4)], were studied by single-crystal X-ray diffraction. A combination of manometric, spectroscopic, and diffraction results suggests little or no Ag --> CO pi-backbonding in these complexes, which makes them rare examples of sigma-only metal carbonyls (and for which we propose the name nonclassical metal carbonyls). The data include the following: nu(CO) values, which range from 2189 to 2220 cm(-1) solid-state delta(C-13) values, which are similar to 171; J109(Ag)13(C) values, which range from 190 to 284 Hz; chemical shift anisotropies, which range from -45(5) to -76(5) ppm for sigma(parallel to) and from 280(5) to 295(5) ppm for sigma(perpendicular to); Ag-C and C-O bond distances for [Ag(CO)][B(OTeF5)(4)] which are 2.10(1) and 1.077(16) Angstrom, respectively; and Ag-C and C-O bond distances for the three unique cations in [Ag(CO)(2)][B(OTeF5)(4)], which range from 2.06(5) to 2.20(4) Angstrom and from 1.07(5) to 1.09(6) Angstrom, respectively. For [Ag(CO)][B(OTeF5)(4)], monoclinic, P2(1)/n: a = 10.001(2) Angstrom, b = 16.180(4) Angstrom, c = 12.235(3) Angstrom, beta = 100.48(2)degrees, Z = 4, T = -125 degrees C, R = 0.040. For [Ag(CO)(2)][B(OTeF5)(4)], triclinic, : a = 10.367(5) Angstrom, b = 13.146(7) Angstrom, c = 16.56(1) Angstrom, alpha = 87.77(5)degrees, beta = 76.38(4)degrees, gamma = 89.06(4)degrees, Z = 4, T = -100 degrees C, R = 0.078. The structure of [(CH3)(2)CHCO][SbCl6] was redetermined at low temperature by single-crystal X-ray diffraction. The C-O distance in the acylium cation was found to be 1.101(4) Angstrom, significantly shorter than the 1.12822(7) Angstrom bond distance in gaseous CO. For [(CH3)(2)CHCO][SbCl6], orthorhombic, Pnma: a = 19.368(1) Angstrom, b = 7.055(1)Angstrom, c = 9.108(1) Angstrom, Z = 4, T = -130 degrees C, R = 0.020. C1 COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 185 TC 138 Z9 138 U1 1 U2 25 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 NOV 2 PY 1994 VL 116 IS 22 BP 10003 EP 10014 DI 10.1021/ja00101a021 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA PP754 UT WOS:A1994PP75400021 ER PT J AU MEYER, TY WOERPEL, KA NOVAK, BM BERGMAN, RG AF MEYER, TY WOERPEL, KA NOVAK, BM BERGMAN, RG TI SILICA AS A LIGAND - REACTIVITY OF THE IRIDIUM-OXYGEN BOND OF CP-ASTERISK-IR[SILICA](PH)(PME(3)) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID SURFACE ORGANOMETALLIC CHEMISTRY; TRANSITION-METALS; CATALYSTS; COMPLEXES; ETHYLENE; POLYMERIZATION; HYDROGENATION; ACTIVATION; PHENOLS; IR C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. OI Meyer, Tara/0000-0002-9810-454X NR 28 TC 38 Z9 38 U1 0 U2 2 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 NOV 2 PY 1994 VL 116 IS 22 BP 10290 EP 10291 DI 10.1021/ja00101a055 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA PP754 UT WOS:A1994PP75400055 ER PT J AU LUO, XL KUBAS, GJ BRYAN, JC BURNS, CJ UNKEFER, CJ AF LUO, XL KUBAS, GJ BRYAN, JC BURNS, CJ UNKEFER, CJ TI ETA(2)-COORDINATION OF SI-H SIGMA-BONDS TO TRANSITION-METAL FRAGMENTS THAT ALSO BIND ETA(2)-DIHYDROGEN LIGANDS AND AGOSTIC C-H BONDS - SYNTHESIS AND CHARACTERIZATION OF ETA(2)-SILANE COMPLEXES CIS-MO(ETA(2)-H-SIHR'(2))(CO)(R(2)PC(2)H(4)PR(2))(2) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID MOLECULAR-HYDROGEN COMPLEXES; DIHYDROGEN COMPLEXES; DIHYDRIDE; COORDINATION; EQUILIBRIUM; POLYHYDRIDE; CHEMISTRY; RUTHENIUM; TAUTOMERS; EXCHANGE C1 LOS ALAMOS NATL LAB, INORGAN & STRUCT CHEM GRP CST3, LOS ALAMOS, NM 87545 USA. NR 25 TC 93 Z9 93 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD NOV 2 PY 1994 VL 116 IS 22 BP 10312 EP 10313 DI 10.1021/ja00101a066 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA PP754 UT WOS:A1994PP75400066 ER PT J AU HOUK, RS AF HOUK, RS TI ELEMENTAL AND ISOTOPIC ANALYSIS BY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY SO ACCOUNTS OF CHEMICAL RESEARCH LA English DT Review ID PERFORMANCE LIQUID-CHROMATOGRAPHY; DIRECT-INJECTION NEBULIZATION; POLYATOMIC ION INTERFERENCES; SIZE-EXCLUSION CHROMATOGRAPHY; ICP-MS; CRYOGENIC DESOLVATION; IONIZATION SOURCE; RATIO MEASUREMENT; TRACE-ELEMENTS; ARGON PLASMA RP HOUK, RS (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,US DOE,AMES LAB,AMES,IA 50011, USA. NR 57 TC 45 Z9 45 U1 0 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0001-4842 J9 ACCOUNTS CHEM RES JI Accounts Chem. Res. PD NOV PY 1994 VL 27 IS 11 BP 333 EP 339 DI 10.1021/ar00047a003 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA PR839 UT WOS:A1994PR83900004 ER PT J AU FRY, RJM AF FRY, RJM TI RADIATION PROTECTION GUIDELINES FOR SPACE ACTIVITIES SO ACTA ASTRONAUTICA LA English DT Article AB At the beginning of the space age the dangers of hurtling into space were considerable. Despite this fact, radiation risks were examined in the U.S.S.R. and the U.S.A. and recommendations were made to limit the exposure of the crews to radiation. To date the radiation exposures of crews on missions in low-Earth orbits have been low. Now that missions in low-Earth orbit are becoming longer in duration and new missions into deep space are being considered, radiation protection guidelines become more important. Recently the estimates of the risks of radiation-induced cancer have been increased and new guidelines on radiation exposure limits for crew members must be developed. For deep space missions the guidelines take into account the risks posed by heavy ions. Unfortunately, knowledge about these risks is insufficient. If the new risk estimates are applied, current career dose limits may have to be reduced by a factor of two. RP FRY, RJM (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0094-5765 J9 ACTA ASTRONAUT JI Acta Astronaut. PD NOV PY 1994 VL 32 IS 11 BP 735 EP 737 PG 3 WC Engineering, Aerospace SC Engineering GA QL088 UT WOS:A1994QL08800005 PM 11538451 ER PT J AU BINER, SB AF BINER, SB TI A NUMERICAL-ANALYSIS OF CRACK-GROWTH IN MICROCRACKING BRITTLE SOLIDS SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID FINITE-ELEMENT METHOD; RESISTANCE; TIP; CERAMICS AB In this study a set of numerical analyses of crack growth was performed to elucidate the influence of microcracking on the observed fracture behavior of brittle solids and composites. The random nucleation, orientation and size effects of discrete microcracks and resulting interactions are fully accounted for in a hybrid finite element model. The results indicate that for development of R-curve behavior, the formation of a wake region is necessary. The near-field microcracks are not the sole dominating factor in the development of the R-curve behavior, their interactions can be strongly amplified or mitigated by the far-field cracks. Therefore, the microcrack zone width as well as microcrack density plays an important role in toughening behavior. The continuum description of microcracking can provide a reasonable estimation of shielding; however, it fails to distinguish the effects of microcrack length and the role of the wake region during the crack extension. RP BINER, SB (reprint author), IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. NR 25 TC 6 Z9 6 U1 2 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD NOV PY 1994 VL 42 IS 11 BP 3643 EP 3651 DI 10.1016/0956-7151(94)90430-8 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA PK350 UT WOS:A1994PK35000007 ER PT J AU GENIN, FY AF GENIN, FY TI DETERMINATION OF THE INTERFACIAL-TENSION BY THERMAL GROOVING AND ZERO CREEP IN COAXIAL WIRES THEORY SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID MULTILAYERS AB A model based on the thermal grooving and zero creep theory is developed to allow absolute measurements of the interfacial energy between two materials in the shape of bamboo coaxial wires. RP GENIN, FY (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 19 TC 6 Z9 6 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD NOV PY 1994 VL 42 IS 11 BP 3881 EP 3885 DI 10.1016/0956-7151(94)90453-7 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA PK350 UT WOS:A1994PK35000030 ER PT J AU ZEMA, N LAMA, F PIACENTINI, M FELICI, AC DEBOWSKA, D KISIEL, A MYCIELSKI, A OLSON, CG AF ZEMA, N LAMA, F PIACENTINI, M FELICI, AC DEBOWSKA, D KISIEL, A MYCIELSKI, A OLSON, CG TI SYNCHROTRON-RADIATION PHOTOEMISSION-STUDIES OF FE 3D STATES IN CD1-XFEXSE SO ACTA PHYSICA POLONICA A LA English DT Article; Proceedings Paper CT 2nd International School and Symposium on Synchrotron Radiation in Natural Science CY MAY 18-26, 1994 CL JASZOWIEC, POLAND SP COMMISS EUROPEAN COMMUNITIES, STATE COMM SCI RES, POLISH ACAD SCI, INST PHYS, JAGIELONIAN UNIV, INST PHYS, POLISH ACAD SCI, COMM PHYS, POLISH ACAD SCI, COMM CRYSTALLOG, POLISH ACAD SCI, INST PHYS CHEM, REG LAB PHYSICOCHEM ANAL, JAGIELLONIAN UNIV, RES, DOCTORQ CO, APRIL BUSINESS COMP CO ID EV ENERGY-RANGE; SEMIMAGNETIC SEMICONDUCTORS; OPTICAL-PROPERTIES; BAND-STRUCTURE; REFLECTIVITY; CD1-XMNXTE AB The angle integrated resonant photoemission measurements of Cd1-xFexSe were performed for different Fe concentrations (x = 0.00, 0.07, 0.14) in the photon energy range between 30 eV and 70 eV using synchrotron radiation. The ternary compound valence band photoemission spectra show, in comparison to the CdSe results, two additional structures, whose intensity depends on Fe content, which were assigned to Fe 3d states of e symmetry with spin up and down, respectively. The hybridization of the t(2) component of the 3d electrons of Fe in the valence band is discussed. C1 UNIV ROMA LA SAPIENZA,DIPARTIMENTO ENERGET,ROME,ITALY. JAGIELLONIAN UNIV,INST PHYS,PL-30059 KRAKOW,POLAND. POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP ZEMA, N (reprint author), CNR,IST STRUTTURA MAT,I-00044 FRASCATI,ITALY. NR 17 TC 2 Z9 2 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 NOV PY 1994 VL 86 IS 5 BP 861 EP 867 PG 7 WC Physics, Multidisciplinary SC Physics GA PR749 UT WOS:A1994PR74900025 ER PT J AU GROSJEAN, D WILLIAMS, EL GROSJEAN, E AF GROSJEAN, D WILLIAMS, EL GROSJEAN, E TI EVOLVED GAS-ANALYSIS OF SECONDARY ORGANIC AEROSOLS SO AEROSOL SCIENCE AND TECHNOLOGY LA English DT Article ID LOS-ANGELES AEROSOL; BETA-PINENE; SOUTHERN CALIFORNIA; SIZE DISTRIBUTIONS; PHOTOOXIDATION; GROWTH; CARBON; OZONE; RESOLUTION; COMPONENT AB Secondary organic aerosols have been characterized by evolved gas analysis (EGA). Hydrocarbons selected as aerosol precursors were representative of anthropogenic emissions (cyclohexene, cyclopentene, 1-decene and 1-dodecene, n-dodecane, o-xylene, and 1,3,5-trimethylbenzene) and of biogenic emissions (the terpenes alpha-pinene, beta-pinene and d-limonene and the sesquiterpene trans-caryophyllene). Also analyzed by EGA were samples of secondary, primary (highway tunnel), and ambient (urban) aerosols before and after exposure to ozone and other photochemical oxidants. The major features of the EGA thermograms (amount of CO2 evolved as a function of temperature) are described. The usefulness and limitations of EGA data for source apportionment of atmospheric particulate carbon are briefly discussed. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. RP GROSJEAN, D (reprint author), DGA INC,4526 TEL RD,SUITE 205,VENTURA,CA 93003, USA. OI grosjean, daniel/0000-0001-6941-2490 NR 28 TC 21 Z9 21 U1 1 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0278-6826 J9 AEROSOL SCI TECH JI Aerosol Sci. Technol. PD NOV PY 1994 VL 21 IS 4 BP 306 EP 324 DI 10.1080/02786829408959718 PG 19 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA PN366 UT WOS:A1994PN36600005 ER PT J AU TSOURIS, C DEPAOLI, DW FENG, JQ BASARAN, OA SCOTT, TC AF TSOURIS, C DEPAOLI, DW FENG, JQ BASARAN, OA SCOTT, TC TI ELECTROSTATIC SPRAYING OF NONCONDUCTIVE FLUIDS INTO CONDUCTIVE FLUIDS SO AICHE JOURNAL LA English DT Note ID ELECTRIC-FIELD; LIQUIDS; DROPS RP TSOURIS, C (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. RI Tsouris, Costas/C-2544-2016 OI Tsouris, Costas/0000-0002-0522-1027 NR 17 TC 24 Z9 24 U1 0 U2 3 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0001-1541 J9 AICHE J JI AICHE J. PD NOV PY 1994 VL 40 IS 11 BP 1920 EP 1923 DI 10.1002/aic.690401116 PG 4 WC Engineering, Chemical SC Engineering GA PP897 UT WOS:A1994PP89700015 ER PT J AU MYERS, G AF MYERS, G TI 10TH ANNIVERSARY PERSPECTIVES ON AIDS - HIV - BETWEEN PAST AND FUTURE SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Editorial Material ID V3 REGION; AFRICA; SEQUENCES; INFECTION; SPREAD; VIRUS RP MYERS, G (reprint author), LOS ALAMOS NATL LAB,HIV SEQUENCE DATABASE & ANAL PROJECT,POB 1663,LOS ALAMOS,NM 87545, USA. NR 68 TC 78 Z9 80 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1317 EP 1324 DI 10.1089/aid.1994.10.1317 PG 8 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600001 PM 7888185 ER PT J AU OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B AF OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B TI HIV TYPE-1 VARIATION IN WORLD-HEALTH-ORGANIZATION-SPONSORED VACCINE EVALUATION SITES - GENETIC SCREENING, SEQUENCE-ANALYSIS, AND PRELIMINARY BIOLOGICAL CHARACTERIZATION OF SELECTED VIRAL STRAINS SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID HUMAN-IMMUNODEFICIENCY-VIRUS; AMINO-ACID SUBSTITUTION; ANTIGENIC VARIATION; PRIMARY INFECTION; ENV GENES; PHENOTYPE; MUTATIONS; VARIANTS; PROTEIN; DOMAIN AB A laboratory network has been established by the World Health Organization (WHO) to systematically isolate and characterize HIV strains from different parts of the world, and to obtain information and reagents that would facilitate HIV vaccine development. Sixty-three HIV-1 isolates obtained from 224 specimens collected during 1992-1993 in Brazil, Rwanda, Thailand, and Uganda were characterized in this initial study. Virus strains were first genetically subtyped using three different screening methodologies: PCR-gag fingerprinting, RNase A mismatch, and heteroduplex mobility assay (HMA). In addition, selected viruses were sequenced in V3 (52 strains), C2-V3 (42 strains), gp120 (15 strains), and/or gp160 (8 strains) regions of their envelope genes. These studies identified viruses belonging to different sequence subtypes in the four countries: 16 subtype B and 1 subtype C strains in Brazil, 13 subtype A strains in Rwanda, 15 subtype E and 2 subtype B strains in Thailand, and 3 subtype A and 13 subtype D strains in Uganda. Comparison of sequence data with results from the genetic screening efforts identified the HMA as a rapid and reliable method for sequence subtype determinations. The majority of strains were collected from persons documented to have recently seroconverted to HIV-1 positivity, and most strains were found to have slow replication and low cytopathic characteristics and to be non-syncytium-inducing (slow/low-NSI phenotypes) in vitro, which, in many cases, correlated with the corresponding genotype and charge of the V3 loop amino acid sequences. This collection of HIV strains is presently being characterized immunologically and serologically, including neutralization assays, to define whether there are immunological correlates of the sequence subtypes. Identification of potential immunotypes would be of considerable importance for the further development of HIV vaccines. C1 GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,FREDERICK,MD 21701. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RP OSMANOV, S (reprint author), WHO,GLOBAL PROGRAMME AIDS,DIV RES & INTERVENT DEV,VACCINE DEV UNIT,CH-1211 GENEVA 27,SWITZERLAND. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008 OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427 NR 54 TC 110 Z9 110 U1 0 U2 2 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1327 EP 1343 DI 10.1089/aid.1994.10.1327 PG 17 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600003 ER PT J AU BACHMANN, MH DELWART, EL SHPAER, EG LINGENFELTER, P SINGAL, R MULLINS, JI OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B AF BACHMANN, MH DELWART, EL SHPAER, EG LINGENFELTER, P SINGAL, R MULLINS, JI OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B TI RAPID GENETIC-CHARACTERIZATION OF HIV TYPE-1 STRAINS FROM 4 WORLD-HEALTH-ORGANIZATION-SPONSORED VACCINE EVALUATION SITES USING A HETERODUPLEX MOBILITY ASSAY SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID THAILAND; POPULATIONS; GENOTYPES AB To assist in the preparation for the testing of vaccines against human immunodeficiency virus (HIV) we, as part of the World Health Organization Network for HIV Isolation and Characterization (WHO-NHIC), evaluated the genotypic variation of HIV-1 in cohorts from Brazil, Rwanda, Thailand, and Uganda. Here we report the results from a pilot study of 65 HIV-1-infected individuals. In all cases in which viral envelope gene fragments could be amplified by polymerase chain reaction, subtypes could be assigned using a heteroduplex mobility assay (HMA)(1) by comparison with HIV-1 strains representing six HIV-1 envelope subtypes. All subtype classifications matched those found by envelope gene sequencing. Phylogenetic relationships were further clarified by heteroduplex formation between samples within each subtype. A relatively homogeneous subtype E virus population predominated over subtype B viruses in the sample set from Thailand. Viruses from the other countries were also limited to one or two subtypes but were more divergent within each subtype. All samples from Rwanda (13/13) and some from Uganda (3/16) were of subtype A; all Brazilian samples were of subtype B, except for one belonging to subtype C; most samples from Uganda (13/16) clustered with the subtype D. Analysis by HMA is therefore applicable for screening of HIV-1 genotypes in countries under consideration for large-scale vaccine trials. It should be generally useful when samples containing at least one variable genetic locus need to be rapidly classified by genotype and/or analyzed for epidemiological clustering. C1 UNIV WASHINGTON,DEPT MICROBIOL,SEATTLE,WA 98195. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV WASHINGTON,DEPT MED,SEATTLE,WA 98195. WHO,WHO NETWORK HIV ISOLAT & CHARACT,GLOBAL PROGRAMME AIDS,GENEVA,SWITZERLAND. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,VIRUS BIOL UNIT,FREDERICK,MD. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. HARVARD UNIV,SCH PUBL HLTH,DEPT CANC BIOL,BOSTON,MA 02115. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008; Bachmann, Michael/N-9339-2016; OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427; Bachmann, Michael/0000-0002-0204-3720; Delwart, Eric/0000-0002-6296-4484 FU NIAID NIH HHS [AI32885] NR 24 TC 77 Z9 80 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1345 EP 1353 DI 10.1089/aid.1994.10.1345 PG 9 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600004 PM 7888187 ER PT J AU KORBER, BTM OSMANOV, S ESPARZA, J MYERS, G BELSEY, EM HEYWARD, W GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J KORBER, B AF KORBER, BTM OSMANOV, S ESPARZA, J MYERS, G BELSEY, EM HEYWARD, W GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J KORBER, B TI THE WORLD-HEALTH-ORGANIZATION GLOBAL PROGRAM ON AIDS PROPOSAL FOR STANDARDIZATION OF HIV SEQUENCE NOMENCLATURE SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article AB The World Health Organization Global Programme on AIDS (WHO/GPA) is conducting a large-scale collaborative study of human immunodeficiency virus type 1 (HIV-1) variation, based in four potential vaccine-trial site countries: Brazil, Rwanda, Thailand, and Uganda.(1) Through the course of this study, it was crucial to keep track of certain attributes of the samples from which the viral nucleotide sequences were derived (e.g., country of origin and viral culture characterization), so that meaningful sequence comparisons could be made. Here we describe a system developed in the context of the WHO/GPA study that summarizes such critical attributes by representing them as standardized characters directly incorporated into sequence names. This nomenclature allows linkage of clinical, phenotypic, and geographic information with molecular data. We propose that other investigators involved in human immunodeficiency virus (HIV) nucleotide sequencing efforts adopt a similar standardized sequence nomenclature to facilitate cross-study sequence comparison. HIV sequence data are being generated at an ever-increasing rate; directly coupled to this increase is our deepening understanding of biological parameters that influence or result from sequence variability. A standardized sequence nomenclature that includes relevant biological information would enable researchers to better utilize the growing body of sequence data, and enhance their ability to interpret the biological implications of their own data through facilitating comparisons with previously published work. C1 SANTA FE INST,SANTA FE,NM 87501. WHO,GLOBAL PROGRAMME AIDS,WHO NETWORK HIV ISOLAT & CHARACT,VACCINE DEV UNIT,CH-1211 GENEVA,SWITZERLAND. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,VIRUS BIOL UNIT,FREDERICK,MD. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. RP KORBER, BTM (reprint author), LOS ALAMOS NATL LAB,DIV THEORY,POB 1663,LOS ALAMOS,NM 87545, USA. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008; OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427; Korber, Bette/0000-0002-2026-5757 NR 8 TC 39 Z9 39 U1 0 U2 1 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1355 EP 1358 DI 10.1089/aid.1994.10.1355 PG 4 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600005 PM 7888188 ER PT J AU GAO, F YUE, L CRAIG, S THORNTON, CL ROBERTSON, DL MCCUTCHAN, FE BRADAC, JA SHARP, PM HAHN, BH OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B AF GAO, F YUE, L CRAIG, S THORNTON, CL ROBERTSON, DL MCCUTCHAN, FE BRADAC, JA SHARP, PM HAHN, BH OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B TI GENETIC-VARIATION OF HIV TYPE-1 IN 4 WORLD-HEALTH-ORGANIZATION-SPONSORED VACCINE EVALUATION SITES - GENERATION OF FUNCTIONAL ENVELOPE (GLYCOPROTEIN-160) CLONES REPRESENTATIVE OF SEQUENCE SUBTYPE-A, SUBTYPE-B, SUBTYPE-C, AND SUBTYPE-E SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID HUMAN-IMMUNODEFICIENCY-VIRUS; HUMAN MONOCLONAL-ANTIBODY; PHYLOGENETIC ANALYSIS; CD4 BINDING; NEUTRALIZATION; DIVERSITY; EPITOPES; REGION; IDENTIFICATION; GENOTYPES AB As part of the WHO Network for HIV Isolation and Characterization, we PCR amplified, cloned, and sequenced gp120 and gp160 genes from 12 HIV-1 isolates collected in four WHO-sponsored vaccine evaluation sites (Brazil, Rwanda, Thailand, Uganda). Envelope clones were derived from PBMC-grown isolates obtained from asymptomatic individuals within 2 years of seroconversion. Analysis of their deduced amino acid sequences identified all but one to contain an uninterrupted open reading frame. Transient expression and biological characterization of selected gp160 constructs identified six clones to encode full length and functional envelope glycoproteins. Phylogenetic analysis of their nucleotide sequences revealed that they represent HIV-1 subtypes A, B, C, and E. Since current knowledge of HIV-1 envelope immunobiology is almost exclusively derived from subtype B viruses, these reagents should facilitate future envelope structure, function and antigenicity studies on a broader spectrum of viruses. This should assist in the design and evaluation of effective vaccines against HIV-1. C1 UNIV ALABAMA, DEPT MED, BIRMINGHAM, AL 35294 USA. UNIV ALABAMA, DEPT MICROBIOL, BIRMINGHAM, AL 35294 USA. UNIV NOTTINGHAM, QUEENS MED CTR, DEPT GENET, NOTTINGHAM NG7 2UH, ENGLAND. WALTER REED ARMY INST RES, HENRY M JACKSON FDN RES LAB, ROCKVILLE, MD 20850 USA. NIAID, VACCINE RES & DEV BRANCH, BETHESDA, MD 20892 USA. WHO, WHO NETWORK HIV ISOLAT & CHARACT, GLOBAL PROGRAMME AIDS, CH-1211 GENEVA, SWITZERLAND. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST, FRANKFURT, GERMANY. NATL INST BIOL STAND & CONTROLS, LONDON NW3 6RB, ENGLAND. NIAID, DIV AIDS, BETHESDA, MD 20892 USA. WALTER REED ARMY INST RES, HENRY M JACKSON FDN RES LAB, ROCKVILLE, MD USA. INST SALUD CARLOS 3, CTR NACL BIOL CELULAR & RETROVIRUS, MADRID, SPAIN. STANFORD UNIV, SCH MED, DEPT MICROBIOL & IMMUNOL, STANFORD, CA 94305 USA. UNIV AMSTERDAM, HUMAN RETROVIRUS LAB, AMSTERDAM, NETHERLANDS. UNIV ALABAMA, DEPT MED, BIRMINGHAM, AL 35294 USA. INST COCHIN GENET MOLEC, F-75014 PARIS, FRANCE. CTR DIS CONTROL & PREVENT, ATLANTA, GA 30341 USA. ST MARYS HOSP, SCH MED, LONDON, ENGLAND. NCI, VIRUS BIOL UNIT, FREDERICK, MD 21701 USA. KAROLINSKA INST, STOCKHOLM, SWEDEN. SWEDISH INST INFECT DIS CONTROL, STOCKHOLM, SWEDEN. LOS ALAMOS NATL LAB, LOS ALAMOS, NM USA. RI Sharp, Paul/F-5783-2010; Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008 OI Sharp, Paul/0000-0001-9771-543X; Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427 FU NIAID NIH HHS [P30 AI27767, R01 AI25291] NR 50 TC 105 Z9 107 U1 0 U2 3 PU MARY ANN LIEBERT, INC PI NEW ROCHELLE PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA SN 0889-2229 EI 1931-8405 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1359 EP 1368 DI 10.1089/aid.1994.10.1359 PG 10 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600006 PM 7888189 ER PT J AU PAU, CP KAI, M HOLLOMANCANDAL, DL LUO, CC KALISH, ML SCHOCHETMAN, G BYERS, B GEORGE, JR OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S KALISH, M GEORGE, R WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B AF PAU, CP KAI, M HOLLOMANCANDAL, DL LUO, CC KALISH, ML SCHOCHETMAN, G BYERS, B GEORGE, JR OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S KALISH, M GEORGE, R WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B TI ANTIGENIC VARIATION AND SEROTYPING OF HIV TYPE-1 FROM 4 WORLD-HEALTH-ORGANIZATION-SPONSORED HIV VACCINE SITES SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID EPITOPES AB Serologic reactivities of serum or plasma from 55 HIV-1 subjects in four countries-Brazil, Rwanda, Thailand, and Uganda-were examined by V3 peptide immunoassay. Forty-seven (85.5%) of the 55 specimens tested positive to the homologous peptide. A strong correlation between serotype (i.e., pattern of serologic reactivity with a panel of peptides) and genotype was not found. However, the V3 peptide immunoassays may be useful for epidemiologic studies to trace the distinctive HIV-1 strains from different geographic regions of the world. The serology data obtained may be useful for the development of effective V3-based vaccines. C1 WHO,GLOBAL PROGRAMME AIDS,WHO NETWORK HIV ISOLAT & CHARACT,CH-1211 GENEVA,SWITZERLAND. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD 20892. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,FREDERICK,MD 21701. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RP PAU, CP (reprint author), CTR DIS CONTROL,NATL CTR INFECT DIS,DIV HIV AIDS,1600 CLIFTON RD,ATLANTA,GA 30333, USA. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008 OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427 NR 12 TC 63 Z9 63 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1369 EP 1377 DI 10.1089/aid.1994.10.1369 PG 9 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600007 PM 7888190 ER PT J AU CHEINGSONGPOPOV, R LISTER, S CALLOW, D KALEEBU, P BEDDOWS, S WEBER, J OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B AF CHEINGSONGPOPOV, R LISTER, S CALLOW, D KALEEBU, P BEDDOWS, S WEBER, J OSMANOV, S BELSEY, EM HEYWARD, W ESPARZA, J GALVAOCASTRO, B VANDEPERRE, P KARITA, E WASI, C SEMPALA, S TUGUME, B BIRYAHWAHO, B RUBSAMENWAIGMANN, H VONBRIESEN, H ESSER, R GREZ, M HOLMES, H NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP NARA, P FENYO, EM ALBERT, J MYERS, G KORBER, B TI SEROTYPING HIV TYPE-1 BY ANTIBODY-BINDING TO THE V3 LOOP - RELATIONSHIP TO VIRAL GENOTYPE SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID IMMUNODEFICIENCY-VIRUS TYPE-1; PRINCIPAL NEUTRALIZING DETERMINANT; MONOCLONAL-ANTIBODY; DOMAIN; GP120; ENVELOPE; SEQUENCE; IDENTIFICATION; CHIMPANZEES; EPITOPES AB We have investigated whether peptides representing the HIV-1 principal neutralization domain (V3) can be used as antigens in antibody-binding assays to predict the genotypes of the subjects' virus. Serum samples collected from HIV-1-infected subjects from the four WHO-sponsored vaccine evaluation sites (Uganda, Rwanda, Thailand, and Brazil) were characterized by antibody binding to a panel of synthetic V3 peptides that were derived from the consensus sequences of the V3 region of the HIV-1 subgroups according to the env phylogenetic analysis (A-E). An indirect V3 peptide-binding assay was used for primary screening, and a V3 peptide antigen-limiting ELISA was then used as a secondary assay to discriminate cross-reactivity if the screening assay was equivocal. In general, V3 peptide serology could predict HIV-1 genotypes. In sera for which the genotype of the virus was known, peptide assays could predict the correct genotype in approximately 90% of cases for genotypes A, B, C, and E; Ugandan sera of genotype D were more broadly reactive. There was considerable serological cross-reactivity between some HIV-1 genotypes, in particular between A and C, and, to a lesser extent, B and D subtypes. Owing to polymorphism at the crown of the V3 loop, an additional B peptide (B') was required to type Brazilian B genotype sera. These simple assays may help facilitate the determination and distribution of HIV-1 genotypes circulating in populations. C1 WHO,GLOBAL PROGRAMME AIDS,WHO NETWORK HIV ISOLAT & CHARACT,CH-1211 GENEVA,SWITZERLAND. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD 20892. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,VIRUS BIOL UNIT,FREDERICK,MD 21701. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RP CHEINGSONGPOPOV, R (reprint author), ST MARYS HOSP,SCH MED,DEPT GENITOURINARY MED & COMMUNICABLE DIS,PRAED ST,LONDON W2 1NY,ENGLAND. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008 OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427 NR 29 TC 85 Z9 86 U1 0 U2 1 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1379 EP 1386 DI 10.1089/aid.1994.10.1379 PG 8 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600008 PM 7888191 ER PT J AU DEWOLF, F HOGERVORST, E GOUDSMIT, J FENYO, EM RUBSAMENWAIGMANN, H HOLMES, H GALVAOCASTRO, B KARITA, E WASI, C SEMPALA, SDK BAAN, E ZORGDRAGER, F LUKASHOV, V OSMANOV, S KUIKEN, C CORNELISSEN, M BELSEY, EM HEYWARD, W ESPARZA, J VANDEPERRE, P SEMPALA, S TUGUME, B BIRYAHWAHO, B VONBRIESEN, H ESSER, R GREZ, M NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P ALBERT, J MYERS, G KORBER, B AF DEWOLF, F HOGERVORST, E GOUDSMIT, J FENYO, EM RUBSAMENWAIGMANN, H HOLMES, H GALVAOCASTRO, B KARITA, E WASI, C SEMPALA, SDK BAAN, E ZORGDRAGER, F LUKASHOV, V OSMANOV, S KUIKEN, C CORNELISSEN, M BELSEY, EM HEYWARD, W ESPARZA, J VANDEPERRE, P SEMPALA, S TUGUME, B BIRYAHWAHO, B VONBRIESEN, H ESSER, R GREZ, M NEWBERRY, A RANJBAR, S TOMLINSON, P BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P ALBERT, J MYERS, G KORBER, B TI SYNCYTIUM-INDUCING AND NON-SYNCYTIUM-INDUCING CAPACITY OF HUMAN-IMMUNODEFICIENCY-VIRUS TYPE-1 SUBTYPES OTHER THAN B - PHENOTYPIC AND GENOTYPIC CHARACTERISTICS SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID SURFACE ENVELOPE GLYCOPROTEIN; AMINO-ACID SUBSTITUTION; T-CELL-LINE; ANTIGENIC VARIATION; V3 LOOP; NEUTRALIZING ANTIBODIES; SYNTHETIC PEPTIDES; INFECTED INDIVIDUALS; BIOLOGICAL PHENOTYPE; MACROPHAGE TROPISM AB Positively charged amino acid substitutions at positions 11 and 25 within the loop of the third variable region (V3) of HIV-1 subtype B envelope have been shown to be associated with the syncytium-inducing (SI) phenotype of the virus. The present study was designed to examine SI and NSI-associated V3 mutations in HIV-1 subtypes other than B. HIV-1 RNA was isolated from 53 virus stocks and 26 homologous plasma samples from 53 recently infected individuals from Brazil, Rwanda, Thailand, and Uganda. The C2-V3 region of the viral envelope was converted to cDNA, amplified, and sequenced. Of 53 primary virus stock samples 49 were biologically phenotyped through measurement of the syncytium-inducing capacity in MT-2 cells (to differentiate between SI and NSI phenotypes). In addition, after passage of primary isolates through PHA stimulated donor PBMC, the replication capacity was determined in U937-2, CEM, MT-2, and Jurkat-tat cell lines (to differentiate rapid/high and slow/low phenotypes). According to the sequence analysis 9 (17.0%) of the viruses belonged to subtype A, 15 (28.3%) to subtype B, 1 (1.9%) to subtype C, 13 (24.5%) to subtype D, and 15 (28.3%) to subtype E. Sequence analysis of virus RNA, obtained from 26 homologous plasma samples, confirmed the homogeneity of sequence populations in plasma compared to primary virus isolates. Of the 49 viruses tested 12 had the SI phenotype, 5 were confirmed to be rapid/high, and 4 appeared to be slow/low pattern 3 replicating. Of 49, 29 had the NSI phenotype, 24 were confirmed to be slow/low pattern 1 or 2, and 3 appeared to be slow/low pattern 3 replicating. Analysis of mutations at V3 loop amino acid positions 11 and 25 revealed that 10/12 (83.3%) of the SI viruses had SI-associated V3 mutations and that 28/29 (96.6%) of the NSI viruses lacked these mutations. V3 loop heterogeneity, length polymorphism, and a high number of positively charged amino acid substitutions were most frequently found among subtype D variants. These results indicate that both the phenotypic distinction between SI and NSI viruses and the association of biological phenotype with V3 mutations is present among HIV-1 subtypes other than B. C1 KAROLINSKA INST,DEPT MICROBIOL & TUMORBIOL,STOCKHOLM,SWEDEN. BAYER AG,ZENTRUM PHARMAFORSCH,INST VIROL,W-5600 WUPPERTAL,GERMANY. CHEMOTHERAPEUT FORSCHUNGSINST GEORG SPEYER HAUS,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,POTTERS BAR EN6 3QG,HERTS,ENGLAND. BRAZILIAN NETWORK HIV ISOLAT & CHARACTERIZAT,REFERENCE LAB,SALVADOR,BA,BRAZIL. NATL AIDS CONTROL PROGRAMME,REFERENCE LAB,KIGALI,RWANDA. MAHIDOL UNIV,SIRIRAJ HOSP,FAC MED,DIV VIROL,BANGKOK 10700,THAILAND. UGANDA VIRUS RES INST,ENTEBBE,UGANDA. WHO,GLOBAL PROGRAMME AIDS,WHO NETWORK HIV ISOLAT & CHARACT,VACCINE DEV UNIT,CH-1211 GENEVA,SWITZERLAND. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. NIAID,DIV AIDS,BETHESDA,MD 20892. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,VIROL BIOL UNIT,FREDERICK,MD 21701. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RP DEWOLF, F (reprint author), UNIV AMSTERDAM,ACAD MED CTR,DEPT VIROL,HUMAN RETROVIRUS LAB,K3-368,MEIBERGDREEF 15,1105 AZ AMSTERDAM,NETHERLANDS. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008 OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427 NR 82 TC 145 Z9 145 U1 0 U2 5 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1387 EP 1400 DI 10.1089/aid.1994.10.1387 PG 14 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600009 PM 7888192 ER PT J AU RUBSAMENWAIGMANN, H VONBRIESEN, H HOLMES, H BJORNDAL, A KORBER, B ESSER, R RANJBAR, S TOMLINSON, P GALVAOCASTRO, B KARITA, E SEMPALA, S WASI, C OSMANOV, S FENYO, EM BELSEY, EM HEYWARD, W ESPARZA, J VANDEPERRE, P TUGUME, B BIRYAHWAHO, B GREZ, M NEWBERRY, A BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P ALBERT, J MYERS, G AF RUBSAMENWAIGMANN, H VONBRIESEN, H HOLMES, H BJORNDAL, A KORBER, B ESSER, R RANJBAR, S TOMLINSON, P GALVAOCASTRO, B KARITA, E SEMPALA, S WASI, C OSMANOV, S FENYO, EM BELSEY, EM HEYWARD, W ESPARZA, J VANDEPERRE, P TUGUME, B BIRYAHWAHO, B GREZ, M NEWBERRY, A BRADAC, J MCCUTCHAN, F LOUWAGIE, J HEGERICH, P LOPEZGALINDEZ, C OLIVARES, I DOPAZO, J MULLINS, JI DELWART, EL BACHMANN, HM GOUDSMIT, J DEWOLF, F HAHN, BH GAO, F YUE, L SARAGOSTI, S SCHOCHETMAN, G KALISH, M LUO, CC GEORGE, R PAU, CP WEBER, J CHEINGSONGPOPOV, R KALEEBU, P NARA, P ALBERT, J MYERS, G TI STANDARD CONDITIONS OF VIRUS ISOLATION REVEAL BIOLOGICAL VARIABILITY OF HIV TYPE-1 IN DIFFERENT REGIONS OF THE WORLD SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Article ID HUMAN-IMMUNODEFICIENCY-VIRUS; SYNCYTIUM-INDUCING PHENOTYPE; REPLICATIVE CAPACITY; PROGRESSION; INDIVIDUALS; INFECTION; SEVERITY; DISEASE; DOMAIN; ASSAY AB HIV-1 isolates were obtained from four countries within the framework of the WHO Network for HIV Isolation and Characterization. The use of standard HIV isolation procedures allowed us to compare the biological properties of 126 HIV-1 isolates spanning five genetic subtypes. In primary isolation cultures, viruses from Uganda and Brazil appeared early and replicated without delay, whereas the replication of Thai viruses was delayed by several weeks. Regardless of genetic subtype or country of origin, blood samples collected more than 2 years after seroconversion yielded virus that replicated efficiently in the primary isolation cultures. None of the isolates obtained from Thailand or Rwanda replicated in cell lines, whereas 5 of the 13 Brazilian isolates and 7 of the 11 Ugandan isolates replicated and induced syncytia in MT-2 cells. As expected for virus isolates obtained early in HIV-1 infection (within 2 years of seroconversion), all viruses from Brazil, Rwanda, and Thailand showed a slow/low replicative pattern. For the Ugandan samples, the time from seroconversion was known precisely for a few of the samples and only in one case was less than 2 years. This may explain why the five viruses that were able to replicate in all cell lines, and thus classified as rapid/high, were of Ugandan origin. Viruses able to induce syncytia in MT-2 cells, also induced syncytia in PBMC. However, 8 slow/low viruses (out of 27) gave discordant results, inducing syncytia in PBMC but not in MT-2 cells. Furthermore, using syncytium induction as a marker, changes in virus populations during early in vitro passage in PBMC could be observed. The results indicate that biological variation is a general property of HIV-1 in different regions of the world. Moreover, the time from HIV-1 infection, rather than genetic subtype, seems to be linked to viral phenotype. C1 KAROLINSKA INST,CTR MICROBIOL & TUMORBIOL,S-17177 STOCKHOLM,SWEDEN. GEORG SPEYER HAUS CHEMOTHERAPEUT FORSCHUNSINST,FRANKFURT,GERMANY. NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND. LOS ALAMOS NATL LAB,HIV SEQUENCE DATABASE,LOS ALAMOS,NM. FIOCRUZ MS,SALVADOR,BA,BRAZIL. INST TROP MED,DEPT MICROBIOL,B-2000 ANTWERP,BELGIUM. UGANDA VIRUS RES INST,ENTEBBE,UGANDA. MAHIDOL UNIV,SIRIRAJ HOSP,FAC MED,DEPT MICROBIOL,DIV VIROL,BANGKOK 10700,THAILAND. WHO,GLOBAL PROGRAMME AIDS,WHO NETWORK HIV ISOLAT & CHARACT,CH-1211 GENEVA,SWITZERLAND. NIAID,DIV AIDS,BETHESDA,MD 20892. WALTER REED ARMY INST RES,HENRY M JACKSON FDN RES LAB,ROCKVILLE,MD. INST SALUD CARLOS 3,CTR NACL BIOL CELULAR & RETROVIRUS,MADRID,SPAIN. STANFORD UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,STANFORD,CA 94305. UNIV AMSTERDAM,HUMAN RETROVIRUS LAB,AMSTERDAM,NETHERLANDS. UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294. INST COCHIN GENET MOLEC,F-75014 PARIS,FRANCE. CTR DIS CONTROL & PREVENT,ATLANTA,GA 30341. ST MARYS HOSP,SCH MED,LONDON,ENGLAND. NCI,VIRUS BIOL UNIT,FREDERICK,MD 21701. KAROLINSKA INST,STOCKHOLM,SWEDEN. SWEDISH INST INFECT DIS CONTROL,STOCKHOLM,SWEDEN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RI Dopazo, Joaquin/A-9270-2014; Lopez-Galindez, Cecilio/A-3603-2008; Van de Perre, Philippe/B-9692-2008; OI Dopazo, Joaquin/0000-0003-3318-120X; Lopez-Galindez, Cecilio/0000-0002-2324-9584; Van de Perre, Philippe/0000-0002-3912-0427; Korber, Bette/0000-0002-2026-5757 NR 24 TC 50 Z9 50 U1 0 U2 0 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1401 EP 1408 DI 10.1089/aid.1994.10.1401 PG 8 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600010 PM 7888193 ER PT J AU ABIMIKU, AG STERN, TL ZWANDOR, A MARKHAM, PD CALEF, C KYARI, S SAXINGER, WC GALLO, RC ROBERTGUROFF, M REITZ, MS AF ABIMIKU, AG STERN, TL ZWANDOR, A MARKHAM, PD CALEF, C KYARI, S SAXINGER, WC GALLO, RC ROBERTGUROFF, M REITZ, MS TI SUBGROUP-G HIV TYPE-1 ISOLATES FROM NIGERIA SO AIDS RESEARCH AND HUMAN RETROVIRUSES LA English DT Note ID SEQUENCE C1 NCI,TUMOR CELL BIOL LAB,BETHESDA,MD 20892. MINIST HLTH,JOS,NIGERIA. ADV BIOSCI LABS INC,KENSINGTON,MD 20895. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. PLATEAU STATE HOSP,ICSC,WL AIDS CTR,JOS,NIGERIA. NR 8 TC 46 Z9 47 U1 0 U2 1 PU MARY ANN LIEBERT INC PUBL PI LARCHMONT PA 2 MADISON AVENUE, LARCHMONT, NY 10538 SN 0889-2229 J9 AIDS RES HUM RETROV JI Aids Res. Hum. Retrovir. PD NOV PY 1994 VL 10 IS 11 BP 1581 EP 1583 DI 10.1089/aid.1994.10.1581 PG 3 WC Immunology; Infectious Diseases; Virology SC Immunology; Infectious Diseases; Virology GA PV996 UT WOS:A1994PV99600033 PM 7888214 ER PT J AU ZINGG, BC LEFEBVRE, RB AF ZINGG, BC LEFEBVRE, RB TI POLYMERASE CHAIN-REACTION FOR DETECTION OF BORRELIA-CORIACEAE, PUTATIVE AGENT OF EPIZOOTIC BOVINE ABORTION SO AMERICAN JOURNAL OF VETERINARY RESEARCH LA English DT Article ID LYME-DISEASE SPIROCHETE; ORNITHODOROS-CORIACEUS; BURGDORFERI; DNA; AMPLIFICATION; INFECTIVITY; CULTIVATION; CALIFORNIA; ANTIGENS; FETAL AB The nucleotide sequence of a chromosomally encoded antigen-expressing gene of Borrelia coriaceae was determined and used as a target for the polymerase chain reaction (PCR). Two primer sets were designed specifying the amplification of 269- and 701-bp DNA fragments. Primer set I, producing the short amplicon, was tenfold more sensitive than primer set II. As little as 10 fg of purified B coriaceae DNA could consistently be detected. The PCR assays, containing controlled numbers of whole spirochetes, allowed detectable amplification of 2 to 10 organisms. An internal, nonradioactively labeled gene-specific probe verified specificity of the PCR amplicons. Neither primer set cross-reacted with other related spirochetes. This pen assay was adapted and found suitable for identification of B coriaceae in biological samples, such as blood and thymus. Evidence for presence of B coriaceae in biological samples was not found in tissue samples obtained from experimentally infected cows and their fetuses. These data failed to establish a definite association between B coriaceae and epizootic bovine abortion. C1 LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT VET MICROBIOL & IMMUNOL,DAVIS,CA 95616. NR 30 TC 12 Z9 12 U1 0 U2 1 PU AMER VETERINARY MEDICAL ASSOC PI SCHAUMBURG PA 1931 N MEACHAM RD SUITE 100, SCHAUMBURG, IL 60173-4360 SN 0002-9645 J9 AM J VET RES JI Am. J. Vet. Res. PD NOV PY 1994 VL 55 IS 11 BP 1509 EP 1515 PG 7 WC Veterinary Sciences SC Veterinary Sciences GA PP314 UT WOS:A1994PP31400004 PM 7879972 ER PT J AU MCDONOUGH, SP STULL, CL OSBURN, BI AF MCDONOUGH, SP STULL, CL OSBURN, BI TI ENTERIC PATHOGENS IN INTENSIVELY REARED VEAL CALVES SO AMERICAN JOURNAL OF VETERINARY RESEARCH LA English DT Article ID VIRAL DIARRHEA VIRUS; HEALTH MONITORING-SYSTEM; BOVINE MONONUCLEAR-CELLS; ESCHERICHIA-COLI; DAIRY CALVES; CALF DIARRHEA; INFECTIONS; CATTLE; ANTIBODY; SERUM AB Observations were made on development of diarrhea in special-fed calves (n = 460) on 8 commercial facilities during 2 successive 16-week production cycles at weeks 0, 2, 4, 8, 12 and 16. A total of 23% were affected, with peak number of calves with diarrhea observed at week 0. Suspected enteropathogens were identified in 86% of these calves, most commonly cryptosporidia, coronavirus, and rotavirus. Identified potential zoonotic pathogens included Giardia and Salmonella spp and verotoxigenic Escherichia coli. Noncytopathic bovine viral diarrhea virus was isolated from 6 calves that had repeated bouts of illness. Only 22% of calves entering the veal facilities had adequate transfer of passive immunity. At week 0, serum IgG concentration in calves that subsequently died or had diarrhea was lower (P < 0.001) than that in healthy calves. All calves that died (n = 6) during the first 4 weeks of production had complete failure of transfer of passive immunity. C1 LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT VET MED EXTENS,DAVIS,CA 95616. LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT PATHOL,DAVIS,CA 95616. NR 41 TC 36 Z9 36 U1 2 U2 5 PU AMER VETERINARY MEDICAL ASSOC PI SCHAUMBURG PA 1931 N MEACHAM RD SUITE 100, SCHAUMBURG, IL 60173-4360 SN 0002-9645 J9 AM J VET RES JI Am. J. Vet. Res. PD NOV PY 1994 VL 55 IS 11 BP 1516 EP 1520 PG 5 WC Veterinary Sciences SC Veterinary Sciences GA PP314 UT WOS:A1994PP31400005 PM 7879973 ER PT J AU PHILLIPS, BL KIRKPATRICK, RJ AF PHILLIPS, BL KIRKPATRICK, RJ TI SHORT-RANGE SI-AL ORDER IN LEUCITE AND ANALCIME - DETERMINATION OF THE CONFIGURATIONAL ENTROPY FROM AL-27 AND VARIABLE-TEMPERATURE SI-29 NMR-SPECTROSCOPY OF LEUCITE, ITS CS-EXCHANGED AND RB-EXCHANGED DERIVATIVES, AND ANALCIME SO AMERICAN MINERALOGIST LA English DT Article ID X-RAY-DIFFRACTION; PHASE-TRANSITIONS; TETRAGONAL LEUCITE; SOLID-SOLUTIONS; SILICATES; ZEOLITES; KALSI2O6; SILICON AB We have examined a natural leucite sample, its Rb- and Cs-exchanged derivatives, and analcime using Si-29 and Al-27 MAS NMR spectroscopy, with the objective of providing a better understanding of the Si-Al distribution in these phases. Spectra were obtained at temperatures from 25 to 600-degrees-C for leucite and from 25 to 200-degrees-C for the Cs-exchanged leucite through its tetragonal-to-cubic structural phase transition. The Si-29 NMR spectrum of cubic Cs-exchanged leucite contains five peaks corresponding to the single tetrahedral site having from 0 to 4 next nearest neighbor Al cations. The populations of the five local Si environments indicate the presence of slight additional short-range Si-Al order beyond that produced by Al-Al avoidance. We present expressions from which the configurational entropy (S(c)) due to Si-Al disorder can be calculated from the populations of tetrahedral cation clusters determined from NMR spectra or the assumption of Al-Al avoidance. For cubic leucite, the NMR data indicate that S(c) due to Si-Al disorder is 6.6 +/- 0.2 J/(mol.K), which is comparable with the value of 6.9 J/(mol.K) obtained with the assumption of only Al-Al avoidance. The short-range Si-Al order was also investigated for several samples of the structurally related mineral analcime, which show a wide variation of S(c), from 3.1 to 8.1 J/(mol.K). The Si-29 NMR spectra of the Rb- and Cs-exchanged leucite resemble closely those of the natural leucite at 300 and 600-degrees-C, respectively. The Al-27 chemical shifts for all leucite samples display a linear correlation with the mean bridging-bond angle. C1 LAWRENCE LIVERMORE NATL LAB,DIV EARTH SCI,LIVERMORE,CA 94550. UNIV ILLINOIS,DEPT GEOL,URBANA,IL 61801. NR 27 TC 45 Z9 45 U1 1 U2 6 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD NOV-DEC PY 1994 VL 79 IS 11-12 BP 1025 EP 1031 PG 7 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA PX680 UT WOS:A1994PX68000001 ER PT J AU NAVROTSKY, A RAPP, RP SMELIK, E BURNLEY, P CIRCONE, S CHAI, L BOSE, K AF NAVROTSKY, A RAPP, RP SMELIK, E BURNLEY, P CIRCONE, S CHAI, L BOSE, K TI THE BEHAVIOR OF H2O AND CO2 IN HIGH-TEMPERATURE LEAD BORATE SOLUTION CALORIMETRY OF VOLATILE-BEARING PHASES SO AMERICAN MINERALOGIST LA English DT Article ID THERMODYNAMIC PROPERTIES; THERMOCHEMISTRY; EQUILIBRIA; TRANSITIONS; PHLOGOPITE; AMPHIBOLES; PEROVSKITE AB High-temperature oxide melt solution calorimetry with molten 2PbO.B2O3 as a solvent can be used for determining enthalpies of formation of carbonates and hydrous silicates. Under conditions of gas flow at 1-2 cm3/s, all H2O and CO2 is expelled from the solvent, leading to a reproducible final thermodynamic state. Both analytical data and a number of thermodynamic cycles show that, under these conditions, the volatiles neither dissolve in nor interact energetically with the melt. C1 SANDIA NATL LABS,DEPT GEOCHEM,ALBUQUERQUE,NM 87185. RP NAVROTSKY, A (reprint author), PRINCETON UNIV,DEPT GEOL & GEOPHYS SCI,PRINCETON,NJ 08544, USA. RI Burnley, Pamela /C-4670-2013 OI Burnley, Pamela /0000-0002-7388-0526 NR 27 TC 98 Z9 99 U1 0 U2 4 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD NOV-DEC PY 1994 VL 79 IS 11-12 BP 1099 EP 1109 PG 11 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA PX680 UT WOS:A1994PX68000007 ER PT J AU RICIPUTI, LR PATERSON, BA AF RICIPUTI, LR PATERSON, BA TI HIGH-SPATIAL-RESOLUTION MEASUREMENT OF O-ISOTOPE RATIOS IN SILICATES AND CARBONATES BY ION MICROPROBE SO AMERICAN MINERALOGIST LA English DT Letter ID MASS-SPECTROMETRY; LASER MICROPROBE; SECONDARY; FELDSPAR; QUARTZ AB A Cameca 4f ion microprobe has been used for the in-situ, high spatial-resolution analysis (< 30 mum) of delta O-18 in silicate and carbonate minerals. External reproducibility is consistently similar to that predicted by counting statistics (currently +/-0.6 parts per thousand 1sigma). General correlations between instrumental mass bias and chemical composition are observed. However, instrumental mass bias is mineral specific, and simple chemical models cannot be used to predict instrumental fractionation. RP RICIPUTI, LR (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 14 TC 28 Z9 28 U1 2 U2 2 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD NOV-DEC PY 1994 VL 79 IS 11-12 BP 1227 EP 1230 PG 4 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA PX680 UT WOS:A1994PX68000028 ER PT J AU JANATA, J AF JANATA, J TI 20 YEARS OF ION-SELECTIVE FIELD-EFFECT TRANSISTORS SO ANALYST LA English DT Article; Proceedings Paper CT International Symposium on Electroanalysis (A Tribute to J D R Thomas) CY APR 06-08, 1994 CL CARDIFF, WALES DE ION-SENSITIVE FIELD-EFFECT TRANSISTOR; CHEMICALLY SENSITIVE FIELD-EFFECT TRANSISTOR; MICROSENSOR; ION-SELECTIVE ELECTRODE ID CHEMICALLY-MODIFIED ISFETS; MEMBRANE; SENSORS AB Ion sensitive field-effect transistors have been researched for over twenty years. Several hundred papers have been written about them and they are beginning to appear an the commercial market. The evolution of this field and perennial issues concerning these sensors are reviewed from the author's perspective. RP JANATA, J (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 23 TC 60 Z9 60 U1 0 U2 1 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0003-2654 J9 ANALYST JI Analyst PD NOV PY 1994 VL 119 IS 11 BP 2275 EP 2278 DI 10.1039/an9941902275 PG 4 WC Chemistry, Analytical SC Chemistry GA PT445 UT WOS:A1994PT44500005 ER PT J AU XUE, YJ YEUNG, ES AF XUE, YJ YEUNG, ES TI CHARACTERIZATION OF BAND BROADENING IN CAPILLARY ELECTROPHORESIS DUE TO NONUNIFORM CAPILLARY GEOMETRIES SO ANALYTICAL CHEMISTRY LA English DT Article ID ZONE ELECTROPHORESIS; ABSORPTION DETECTION; LIQUID-CHROMATOGRAPHY; FLOW; ACIDS AB A simple procedure for creating a region of expanded diameter os a capillary column is described. This bubble-shaped on-column flow cell provides an extended path length for absorption detection in capillary electrophoresis (CE) or capillary chromatography. To properly probe the compressed analyte zone in this region, a laser beam with a noise-cancellation circuit was used. Up to 8X enhancement in signal was achieved. Characterization of CE flow profiles in the bubble-shaped region shows that distortions in flow lead to band broadening, especially when a rapid change in diameter over a short column length is present. The electric field lines are, however, still oriented axially throughout the bubble region. Similar disturbances are expected in any coupling schemes in CE that involve a geometry change, in addition to multipath effects and distortions in the electric field. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 30 TC 56 Z9 57 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD NOV 1 PY 1994 VL 66 IS 21 BP 3575 EP 3580 DI 10.1021/ac00093a007 PG 6 WC Chemistry, Analytical SC Chemistry GA PP235 UT WOS:A1994PP23500009 ER PT J AU COLODNER, D SALTERS, V DUCKWORTH, DC AF COLODNER, D SALTERS, V DUCKWORTH, DC TI ION SOURCES FOR ANALYSIS OF INORGANIC SOLIDS AND LIQUIDS BY MS SO ANALYTICAL CHEMISTRY LA English DT Article ID INDUCTIVELY COUPLED PLASMA; DISCHARGE MASS-SPECTROMETRY; INTERFERENCES; NEBULIZATION; QUADRUPOLE; OSMIUM; IONIZATION; RHENIUM; PROBE C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP COLODNER, D (reprint author), COLUMBIA UNIV,LAMONT DOHERTY EARTH OBSERV,NEW CORE LAB 104,RT 9W,PALISADES,NY 10964, USA. RI Salters, Vincent/F-9792-2014; Duckworth, Douglas/B-7171-2015 OI Salters, Vincent/0000-0002-5669-7869; Duckworth, Douglas/0000-0002-8161-5685 NR 46 TC 14 Z9 14 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD NOV 1 PY 1994 VL 66 IS 21 BP A1079 EP A1089 PG 11 WC Chemistry, Analytical SC Chemistry GA PP235 UT WOS:A1994PP23500003 ER PT J AU KONG, S JOHNSTONE, DL YONGE, DR PETERSEN, JN BROUNS, TM AF KONG, S JOHNSTONE, DL YONGE, DR PETERSEN, JN BROUNS, TM TI LONG-TERM INTRACELLULAR CHROMIUM PARTITIONING WITH SUBSURFACE BACTERIA SO APPLIED MICROBIOLOGY AND BIOTECHNOLOGY LA English DT Article ID ENTEROBACTER-CLOACAE STRAIN; ANAEROBIC CONDITIONS; CHROMATE; CONSORTIUM; SURVIVAL; GROWTH; CELLS; FRESH AB Subsurface bacteria were used to study the kinetics of chromate uptake and the internal distribution of the chromium that is taken up by these cells using two equilibration periods (1 and 50 days). Cells that were exposed to chromate for 50 days (to simulate in-situ conditions) were able to sequester up to 200% more chromium per unit mass of cells than were cells that were exposed for only 1 day. Chromium distributions showed an increase in chromium sorption by the cell wall, by the membrane and ribosome, and by the soluble fraction after a 50-day equilibration period compared to after 1 day of equilibration. Killed cell controls suggest that active transport of chromate is the method of intracellular accumulation during the 50-day equilibration period. C1 WASHINGTON STATE UNIV, DEPT CIVIL & ENVIRONM ENGN, PULLMAN, WA 99164 USA. HANYANG UNIV, DEPT CHEM ENGN, SEOUL 133791, SOUTH KOREA. WASHINGTON STATE UNIV, DEPT CHEM ENGN, PULLMAN, WA 99164 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RI Petersen, James/B-8924-2008 NR 16 TC 8 Z9 8 U1 0 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0175-7598 EI 1432-0614 J9 APPL MICROBIOL BIOT JI Appl. Microbiol. Biotechnol. PD NOV PY 1994 VL 42 IS 2-3 BP 403 EP 407 PG 5 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA PW483 UT WOS:A1994PW48300035 ER PT J AU NAMIOKA, T KOIKE, M CONTENT, D AF NAMIOKA, T KOIKE, M CONTENT, D TI GEOMETRIC-THEORY OF THE ELLIPSOIDAL GRATING SO APPLIED OPTICS LA English DT Article DE ELLIPSOIDAL GRATING; ABERRATIONS; SPOT DIAGRAM; RAY TRACING ID FAR-ULTRAVIOLET SPECTROGRAPHS; HOLOGRAPHIC SPHERICAL GRATINGS; HIGH-RESOLUTION SPECTROGRAPH; CORRECTED ASPHERIC GRATINGS; CONCAVE GRATINGS; DESIGNS AB A third-order geometric aberration theory of the ellipsoidal grating has been developed by analytically following an exact ray-tracing formalism with the aid of power series expansions. The theory takes into account all the possible aberrations up to third order and provides analytic formulas for the spot diagram of a spectral image formed by a modified or a nonmodified ellipsoidal grating with any of-the groove patterns producible by means of mechanical ruling or conventional holographic recording. The present analytic formulas and other analytic ray-deviation formulas used in designing grating instruments have been evaluated in comparison with exact ray tracing. The results show the validity of the present theory and the limitation of the ray-deviation formulas based on the light path function and wave-front-aberration theory. C1 NASA, GODDARD SPACE FLIGHT CTR, UNIV SPACE RES ASSOC, GREENBELT, MD 20771 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR XRAY OPT, BERKELEY, CA 94720 USA. NR 30 TC 33 Z9 45 U1 0 U2 20 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD NOV 1 PY 1994 VL 33 IS 31 BP 7261 EP 7274 PG 14 WC Optics SC Optics GA PU623 UT WOS:A1994PU62300003 PM 20941281 ER PT J AU SHEN, YR AF SHEN, YR TI NONLINEAR-OPTICAL STUDIES OF SURFACES SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article; Proceedings Paper CT German-Physical-Society Spring Meeting in Applied Physics CY MAR 21-25, 1994 CL MUNSTER, GERMANY SP GERMAN PHYS SOC ID 2ND-HARMONIC GENERATION; MOLECULAR MONOLAYERS; SPECTROSCOPY AB A brief overview on second-harmonic generation and sum-frequency generation as surface analytical tools is given with a discussion on the intrinsic limitations of the techniques often encountered in the applications. The possibly of using nonlinear optical processes for surface studies has attracted increasing attention in recent years. Optical Second-Harmonic Generation (SHG) and Sum-Frequency Generation (SFG); in particular, have been well accepted as viable surface probes [1]. They have many advantages over the conventional techniques. By nature, they are highly surface-specific and has a submonolayer sensitivity. As coherent optical processes, they are capable of in-situ probing of surface in hostile environment as well as applicable to all interfaces accessible by light. With ultrafast pump-laser pulses, they can be employed to study surface-dynamic processes with a subpicosecond time resolution. These advantages have opened the door to many exciting research opportunities in surface science and technology. This paper gives a brief overview of this fast-growing new area of research. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP SHEN, YR (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 19 TC 32 Z9 33 U1 2 U2 14 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0721-7250 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD NOV PY 1994 VL 59 IS 5 BP 541 EP 543 DI 10.1007/BF00348272 PG 3 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA QB848 UT WOS:A1994QB84800012 ER PT J AU HESS, KR BARSHICK, CM DUCKWORTH, DC SMITH, DH AF HESS, KR BARSHICK, CM DUCKWORTH, DC SMITH, DH TI INFLUENCE OF SOLUTION-DEPOSITED ANIONS ON GLOW-DISCHARGE RELATIVE ION YIELDS SO APPLIED SPECTROSCOPY LA English DT Article DE GLOW DISCHARGE; MASS SPECTROMETRY; RELATIVE ION YIELDS; STANDARD ADDITION ID MASS-SPECTROMETRY; MECHANISMS; CH4/H2/AR; PRODUCTS AB When standard addition methods were employed for quantification in glow discharge mass spectrometry (GDMS), relative ion yields for some, but not all, elements were observed to be greater when deposited as a solution residue than as a corresponding solid of the same composition. The origin of these effects was investigated and determined to result from the deposition of anions present in the solution standards. The enhancements could be duplicated from a solid by pretreatment with a solution containing the anion. The mechanism by which the enhancements occur is not well understood, but we believe it involves a form of reactive etching followed by collisional dissociation of the sputtered molecular species into metal ions. Preliminary research suggests that it may be possible to compensate for changes in relative ion yield with solution treatment by employing an appropriate internal reference standard, or to match closely the matrices of the sample and standard in such a manner that quantification by standard addition is possible. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. FRANKLIN & MARSHALL COLL,DEPT CHEM,LANCASTER,PA 17604. RI Duckworth, Douglas/B-7171-2015 OI Duckworth, Douglas/0000-0002-8161-5685 NR 32 TC 5 Z9 7 U1 0 U2 0 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD NOV PY 1994 VL 48 IS 11 BP 1307 EP 1315 DI 10.1366/0003702944028083 PG 9 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA PW171 UT WOS:A1994PW17100004 ER PT J AU STOFFELS, JJ WACKER, JF KELLEY, JM BOND, LA KIDDY, RA BRAUER, FP AF STOFFELS, JJ WACKER, JF KELLEY, JM BOND, LA KIDDY, RA BRAUER, FP TI ENVIRONMENTAL MONITORING OF HANFORD NUCLEAR FACILITY EFFLUENTS BY THERMAL IONIZATION MASS-SPECTROMETRY SO APPLIED SPECTROSCOPY LA English DT Article DE MASS SPECTROMETRY; THERMAL IONIZATION; ISOTOPE RATIOS; ENVIRONMENTAL MONITORING ID NEGATIVE SURFACE-IONIZATION AB Thermal ionization mass spectrometry (TIMS) is a sensitive method for environmental monitoring of effluent radionuclides around nuclear material production facilities. Isotopic analysis by positive and negative TIMS is an essential tool for the assessment of both the inventory and migration of radionuclides in the environment. Instrumentation used for trace-level isotope ratio measurements is described. Examples are given of environmental measurements of plutonium and radioiodine at the Hanford Site, a former nuclear material production site. In favorable cases, complete isotopic analyses are obtained on total analytes in the femtogram range, and minor isotopes in the attogram range are measured. The method of direct particle-inlet mass spectrometry (PIMS) for real-time analysis of airborne particles is also described, along with PIMS instrumentation. Examples are given that demonstrate the capability of PIMS to measure uranium isotope ratios in individual particles without isolating them from complex, heterogeneous samples. RP STOFFELS, JJ (reprint author), PACIFIC NW LAB, BATTELLE BLVD, RICHLAND, WA 99352 USA. NR 15 TC 17 Z9 17 U1 0 U2 4 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD NOV PY 1994 VL 48 IS 11 BP 1326 EP 1330 DI 10.1366/0003702944028092 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA PW171 UT WOS:A1994PW17100007 ER PT J AU WARREN, AR ALLEN, LA PANG, HM HOUK, RS JANGHORBANI, M AF WARREN, AR ALLEN, LA PANG, HM HOUK, RS JANGHORBANI, M TI SIMULTANEOUS MEASUREMENT OF ION RATIOS BY INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY WITH A TWIN-QUADRUPOLE INSTRUMENT SO APPLIED SPECTROSCOPY LA English DT Article DE INDUCTIVELY COUPLED PLASMA-MASS SPECTROMETRY; ICP-MS; ELEMENTAL ANALYSIS; ISOTOPE RATIOS ID ATOMIC EMISSION-SPECTROMETRY; LEAD ISOTOPE RATIOS; INTERNAL STANDARDIZATION; ICP-MS; ANALYTE EMISSION; SPECTROSCOPY; DROPLETS; NEBULIZATION; FLUCTUATIONS; PARTICLES AB The ion beam from the inductively coupled plasma (ICP) is split into two parts by a device comprised of two electrostatic analyzers in a back-to-back arrangement. Each ion beam is then monitored by a separate quadrupole mass analyzer and electron multiplier. Thus, ion ratios can be measured simultaneously without scanning. Isotope ratios for copper are measured with a precision of 0.14% relative standard deviation (RSD). Internal standard ratios for Co+/La+ are measured with a precision of 1% RSD. Ion signals in the two channels are highly correlated, and the magnitude of flicker noise is reduced in the resulting ratios. Bias in the measured isotope ratios is substantial but can be corrected by calibration. C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, DEPT CHEM, AMES, IA 50011 USA. CTR STABLE ISOTOPE RES INC, CHICAGO, IL 60615 USA. NR 39 TC 20 Z9 20 U1 0 U2 3 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD NOV PY 1994 VL 48 IS 11 BP 1360 EP 1366 DI 10.1366/0003702944027958 PG 7 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA PW171 UT WOS:A1994PW17100011 ER PT J AU BARBER, TE LIST, MS HAAS, JW WACHTER, EA AF BARBER, TE LIST, MS HAAS, JW WACHTER, EA TI DETERMINATION OF NICOTINE BY SURFACE-ENHANCED RAMAN-SCATTERING (SERS) SO APPLIED SPECTROSCOPY LA English DT Article DE SURFACE-ENHANCED RAMAN; SERS; NICOTINE; ENVIRONMENTAL TOBACCO SMOKE; ETS ID SILVER ELECTRODE; SPECTROSCOPY; SPECTRA; PH AB The analytical application of surface-enhanced Raman spectroscopy (SERS) to the determination of nicotine is demonstrated. A simple spectroelectrochemical method using a copper or silver electrode as the SERS substrate has been developed, consisting of three steps: polishing a working electrode to a mirror finish; roughening the electrode in an electrolyte solution; and, finally, depositing the nicotine analyte onto the roughened electrode after immersion in a sample solution. During the reduction cycle, a large enhancement in nicotine Raman scattering is observed at the electrode surface. The intensity of the SERS signal on a silver electrode is linear with concentration from 10 to 900 ppb, with an estimated detection limit of 7 ppb. The total analysis time per sample is approximately five minutes. This procedure has been used to analyze the extract from a cigarette side-stream smoke sample (environmental tobacco smoke); the SERS results agree well with those of conventional gas chromatographic analysis. C1 OAK RIDGE NATL LAB,DIV HLTH SCI RES,OAK RIDGE,TN 37831. NR 21 TC 27 Z9 27 U1 7 U2 32 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD NOV PY 1994 VL 48 IS 11 BP 1423 EP 1427 DI 10.1366/0003702944027985 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA PW171 UT WOS:A1994PW17100021 ER PT J AU JARVIK, GP BRUNZELL, JD AUSTIN, MA KRAUSS, RM MOTULSKY, AG WIJSMAN, E AF JARVIK, GP BRUNZELL, JD AUSTIN, MA KRAUSS, RM MOTULSKY, AG WIJSMAN, E TI GENETIC PREDICTORS OF FCHL IN 4 LARGE PEDIGREES - INFLUENCE OF APO-B LEVEL MAJOR LOCUS PREDICTED GENOTYPE AND LDL SUBCLASS PHENOTYPE SO ARTERIOSCLEROSIS AND THROMBOSIS LA English DT Article DE APO-B; LDL; GRADIENT GEL PHENOTYPE; FAMILIAL COMBINED HYPERLIPIDEMIA ID FAMILIAL COMBINED HYPERLIPIDEMIA; PLASMA APOLIPOPROTEIN-B; CORONARY HEART-DISEASE; ATHEROGENIC LIPOPROTEIN PHENOTYPE; COMPLEX SEGREGATION ANALYSIS; CHOLESTEROL LEVELS; ARTERY DISEASE; COMBINED HYPERLIPEMIA; STABLE ISOTOPES; HYPERTRIGLYCERIDEMIA AB The genetic basis of familial combined hyperlipidemia (FCHL) has eluded investigators for 20 years, despite the apparent segregation of FCHL as an autosomal dominant disorder affecting 1% to 2% of individuals. Etiologic heterogeneity and additive effects of traits controlled by other genetic loci have been suggested. Two traits have been implicated in FCHL. The first is the predominance of a small, dense low-density lipoprotein (LDL), LDL subclass phenotype B, which segregates as a mendelian trait. The second is a mendelian locus with large effects on apolipoprotein (ape) B levels that is defined by complex segregation analysis (predicted apoB level genotype). This study shows that these factors appear to be separate genetic effects, both of which aid in the prediction of FCHL in four large pedigrees. The results suggest that FCHL may be best predicted by a threshold model in which apoB level genotype and LDL subclass phenotype each act to increase the risk of FCHL. Heterogeneity in the transmission of apoB levels among families is suggested, supporting the etiologic heterogeneity of FCHL. These results emphasize the advantages inherent in the study of large pedigrees when disease heterogeneity is suspected. C1 UNIV WASHINGTON,DEPT EPIDEMIOL,DIV ENDOCRINOL & METAB,SEATTLE,WA 98195. UNIV WASHINGTON,SCH PUBL HLTH & COMMUNITY MED,DEPT GENET,SEATTLE,WA 98195. UNIV WASHINGTON,DEPT BIOSTAT,SEATTLE,WA 98195. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP JARVIK, GP (reprint author), UNIV WASHINGTON,MED CTR,DEPT MED,DIV MED GENET RG25,SEATTLE,WA 98195, USA. RI Jarvik, Gail/N-6476-2014 OI Jarvik, Gail/0000-0002-6710-8708 FU NHLBI NIH HHS [HL 30086, HL 38760, HL 49513] NR 61 TC 77 Z9 77 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 1049-8834 J9 ARTERIOSCLER THROMB JI Arterioscler. Thromb. PD NOV PY 1994 VL 14 IS 11 BP 1687 EP 1694 PG 8 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA PR450 UT WOS:A1994PR45000001 PM 7947591 ER PT J AU AMENDT, P CUDDEFORD, P AF AMENDT, P CUDDEFORD, P TI PSEUDOMOMENT STELLAR DYNAMICS .1. SPHEROIDAL GALACTIC EQUILIBRIA SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, STRUCTURE; HYDRODYNAMICS ID GLOBULAR-CLUSTER SYSTEM; RR LYRAE VARIABLES; ELLIPTICAL GALAXIES; SPIRAL GALAXIES; HALO; MODELS; KINEMATICS; DISK; STARS; HYDRODYNAMICS AB A system of pseudomoment fluid equations is developed and applied to the study of spherically distributed stellar populations. The first equation in the pseudomoment hierarchy is formally analogous to the Jeans equations except for the simplifying absence of a term proportional to a (radially) differentiated pseudomoment dispersion (or inverse ''temperature''). From the next set of equations in the pseduomoment hierarchy a simple relation between stellar nonisothermality and radial anisotropy variation is obtained and shown to yield an increasing radial anisotropy with Galactocentric distance for realistic models. A simple relation is derived between the stellar radial pseudomoment dispersion and the circular speed profile. Using the rotation curve analysis of Salucci and Frenk (1992), an increasing rate of falloff in the stellar number density with radius is predicted, for which some observational support exists (Saha 1985). An additional relation between the density and potential for a mildly flattened tracer population is derived and applied toward an estimate for the asphericity of the Galactic potential and the dark halo. Based on Hawkins's (1984) study of RR Lyrae stars within 60 kpc, a nearly spherical Galactic potential and a mildly flattened dark halo (q(rho) approximate to 0.7) are indicated. C1 UNIV OXFORD,DEPT THEORET PHYS,OXFORD OX1 3NP,ENGLAND. RP AMENDT, P (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 47 TC 8 Z9 8 U1 1 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 NOV 1 PY 1994 VL 435 IS 1 BP 93 EP 105 DI 10.1086/174797 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100011 ER PT J AU FIELDS, BD OLIVE, KA SCHRAMM, DN AF FIELDS, BD OLIVE, KA SCHRAMM, DN TI COSMIC-RAY MODELS FOR EARLY GALACTIC LITHIUM, BERYLLIUM, AND BORON PRODUCTION SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC RAYS; GALAXY, EVOLUTION; NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES ID METAL-DEFICIENT DWARFS; HALO-STARS; EARLY GALAXY; PRIMORDIAL NUCLEOSYNTHESIS; ABUNDANCE; EVOLUTION; LI; ORIGIN; BE-9; ISOTOPES AB To understand better the early Galactic production of Li, Be, and B by cosmic-ray spallation and fusion reactions, the dependence of these production rates on cosmic-ray models and model parameters is examined. The sensitivity of elemental and isotopic production to the cosmic-ray path length magnitude and energy dependence, source spectrum, spallation kinematics, and cross section uncertainties is studied. Changes in these model features, particularly those features related to confinement, are shown to alter the Be- and B-versus-Fe slopes from a naive quadratic relation. The implications of our results for the diffuse gamma-ray background are examined, and the role of chemical evolution and its relation to our results is noted. It is also noted that the unmeasured high-energy behavior of alpha + alpha fusion can lead to effects as large as a factor of 2 in the resultant yields. Future data should enable Population II Li, Be, and B abundances to constrain cosmic-ray models for the early Galaxy. C1 UNIV MINNESOTA, SCH PHYS & ASTRON, MINNEAPOLIS, MN 55455 USA. FERMILAB NATL ACCELERATOR LAB, NASA, FERMILAB ASTROPHYS CTR, BATAVIA, IL 60510 USA. RP FIELDS, BD (reprint author), UNIV CHICAGO, DEPT ASTRON & ASTROPHYS, 5640 S ELLIS AVE, CHICAGO, IL 60637 USA. OI Fields, Brian/0000-0002-4188-7141 NR 53 TC 38 Z9 38 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 NOV 1 PY 1994 VL 435 IS 1 BP 185 EP 202 DI 10.1086/174805 PN 1 PG 18 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100019 ER PT J AU GALLANT, YA ARONS, J AF GALLANT, YA ARONS, J TI STRUCTURE OF RELATIVISTIC SHOCKS IN PULSAR WINDS - A MODEL OF THE WISPS IN THE CRAB-NEBULA SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCELERATION OF PARTICLES; ISM, INDIVIDUAL (CRAB NEBULA); PULSARS, GENERAL; SHOCK WAVES ID ELECTRON-POSITRON PLASMAS; GAMMA-RAY SPECTRUM; POLAR CAPS; X-RAY; POTENTIAL DROPS; MAGNETIC-FIELD; MAGNETOHYDRODYNAMIC MODEL; HIGH-ENERGY; ACCELERATION; PARTICLES AB We propose a model of a optical ''wisps'' of the Crab Nebula, features observed in the nebular synchrotron surface brightness near the central pulsar, as manifestations of the internal structure of the shock terminating the pulsar wind. We assume that this wind is composed of ions and a much denser plasma of electrons and positrons, frozen together to a toroidal magnetic field and flowing relativistically. Hoshino et al. (1992) have shown that shocks in such a wind, where the magnetic field is perpendicular to the flow direction, can account for the acceleration of synchrotron-emitting e(+/-) to the power-law distributions observed in the Nebula. For typical pulsar wind parameters, the ions have such high rigidity that their Larmor radius, the basic length scale of the shock structure, is comparable to the observed spacing between the wisps. The shock structure interpretation also accounts naturally for the observed variability of the wisps on timescales of several months. We construct a form of solitary wave model of the shock structure in which we self-consistently solve for the ion orbits and the dynamics of the relativistically hot, magnetized e(+/-) background flow. We ignore dispersion in the ion energies, and we treat the pairs as an adiabatic fluid. The synchrotron emission enhancements, observed as the wisps, are then explained as the regions where reflection of the ions in the self-consistent magnetic field causes compressions of the e(+/-). The wind geometry is assumed to be a radial outflow concentrated around the rotational equatorial plane of the pulsar, to produce the tilted ring morphology of the Nebula observed in X-rays. The Doppler beaming and boosting effects due to the mildly relativistic bulk motion of the e(+/-) readily account for the brightness contrast between the main wisp and faint counterwisp regions, to the northwest and southeast of the pulsar, respectively. We compute synchrotron brightness profiles for model shock structures, incorporating the above effects. Previous work by Hoshino et al. (1992) has suggested that the pairs' energy distribution can be approximated as a relativistic Maxwellian, at least in the first of the magnetic compressions. Approximating the pairs' energy distribution at each point as relativistic Maxwellians, we obtain good agreement with the observed brightness profiles of the main wisp and counterwisp. From this fit, we infer that the upstream Lorentz factor of the wind is y(1) similar to 4 x 10(6) and the preshock magnetic field is B-1 similar to 5 x 10(-5) G, with an ion Larmor radius based on upstream parameters of similar to 0.15 pc, that the equatorial wind must carry most of the 5 x 10(38) ergs s(-1) rotational energy loss of the pulsar, and that roughly two-thirds of this wind energy flux is carried by the ions. It follows that the total injection rate of ions from the pulsar is ZM(i) similar to 3 x 10(34) S-1, close to the Goldreich-Julian current, as would be expected if the pulsar operates as an open-circuited system with ions carrying the return current. We show that the ions are fully ionized at the radii where they encounter the shock and infer that they have been accelerated through at least 20% of the total voltage available on open field lines. The wisp model yields a pair injection rate of N-+/- similar to 5 x 10(37) particles per second. We show that this injection rate is sufficient to account for the nebular X-ray source, whose emission comes primarily from radii slightly larger than the location of the wisps. Our model suggests that the extreme ultraviolet and X-ray spectra of the main wisp and the counterwisp should be close to that of a single-temperature Maxwellian with the temperature of the pairs similar to y(1)m(+/-)c(2)/k similar to 2 x 10(16) K, corresponding to a critical energy for synchrotron emission based on upstream parameters similar to 20 eV. The fact that the wisps appear as elliptical arcs rather than complete ellipses is explained by pitch-angle anisotropy of the synchrotron-emitting e(+/-), which is a natural consequence of the basic acceleration mechanism in these shocks. We use the observations to derive the opening angle of the loss cone as function of distance from the pulsar required to explain the wisps' structure in 1988. We find the opening of the loss cone must decrease by 0.5 rad pc(-1) in the region between 0.04 pc to 0.12 pc from the pulsar. We briefly discuss the physical processes which may control the anisotropy, as well as their relation to the progressive nonthermal heating of the pair plasma with distance from the pulsar. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,CTR THEORET ASTROPHYS,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA. LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA. NR 61 TC 144 Z9 144 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 NOV 1 PY 1994 VL 435 IS 1 BP 230 EP 260 DI 10.1086/174810 PN 1 PG 31 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100024 ER PT J AU HERANT, M BENZ, W HIX, WR FRYER, CL COLGATE, SA AF HERANT, M BENZ, W HIX, WR FRYER, CL COLGATE, SA TI INSIDE THE SUPERNOVA - A POWERFUL CONVECTIVE ENGINE SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; STARS, INTERIORS; STARS, NEUTRON; SUPERNOVA, GENERAL ID STELLAR CORE COLLAPSE; II SUPERNOVAE; NEUTRINO TRANSPORT; DENSE-PLASMA; EXPLOSIONS; MECHANISM; SN-1987A; STARS; HOT; NUCLEOSYNTHESIS AB We present an extensive study of the inception of supernova explosions by following the evolution of the cores of two massive stars (15 and 25 M.) in multidimension. Our calculations begin at the onset of core collapse and stop several hundred milliseconds after the bounce, at which time successful explosions of the appropriate magnitude have been obtained. Similar to the classical delayed explosion mechanism of Wilson, the explosion is powered by the heating of the envelope due to neutrinos emitted by the protoneutron star as it radiates the gravitational energy liberated by the collapse. However, as was shown by Herant, Bent, and Colgate, this heating generates strong convection outside the neutrinosphere, which we demonstrate to be critical to the explosion. By breaking a purely stratified hydrostatic equilibrium, convection moves the nascent supernova away from a delicate radiative equilibrium between neutrino emission and absorption. Thus, unlike what has been observed in one-dimensional calculations, explosions are rendered quite insensitive to the details of the physical input parameters such as neutrino cross sections or nuclear equation of state parameters. As a confirmation, our comparative one-dimensional calculations with identical microphysics, but in which convection cannot occur, lead to dramatic failures. Guided by our numerical results, we have developed a paradigm for the supernova explosion mechanism. We view a supernova as an open cycle thermodynamic engine in which a reservoir of low-entropy matter (the envelope) is thermally coupled and physically connected to a hot bath (the protoneutron star) by a neutrino flux, and by hydrodynamic instabilities. Neutrino heating raises the entropy of matter in the vicinity of the protoneutron star until buoyancy carries it to low-density, low-temperature regions at larger radii. This matter is replaced by low-entropy downflows with negative buoyancy. In essence, a Carnot cycle is established in which convection allows out-of-equilibrium heat transfer mediated by neutrinos to drive low-entropy matter to higher entropy and therefore extracts mechanical energy from the heat generated by gravitational collapse. We argue that supernova explosions are nearly guaranteed and self-regulated by the high efficiency of the thermodynamical engine. The mechanical efficiency is high because mixing during the heat exchange is limited by the rapid rise and shape-preserving expansion of the bubbles in a rho proportional to r(-3) atmosphere. In addition, the ideal Carnot efficiency is high due to the large temperature contrast between the surface of the protoneutron star and the material being convected down from large radii (this contrast remains large in spite of compression and shock heating which is relatively small). By direct P dV integration over the convective cycle, we estimate the energy deposition to be similar to 4 foes per M. involved. Further, convection, by keeping the temperature low in rising neutrino-heated high-entropy bubbles, allows the storage of internal energy while minimizing the losses due to neutrino emission. Thus convection continues to accumulate energy exterior to the neutron star until a successful explosion has occurred. At this time, the envelope is expelled and therefore uncoupled from the heat source (the neutron star) and the energy input ceases. This paradigm does not invoke new or modified physics over previous treatments, but relies on compellingly straightforward thermodynamic arguments. It provides a robust and self-regulated explosion mechanism to power supernovae that is effective under a wide range of physical parameters. C1 UNIV ARIZONA,STEWARD OBSERV,TUCSON,AZ 85721. HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP HERANT, M (reprint author), UNIV CALIF SANTA CRUZ,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064, USA. RI Hix, William/E-7896-2011 OI Hix, William/0000-0002-9481-9126 NR 70 TC 433 Z9 434 U1 2 U2 14 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1994 VL 435 IS 1 BP 339 EP 361 DI 10.1086/174817 PN 1 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100031 ER PT J AU KING, A COMINSKY, L AF KING, A COMINSKY, L TI X-RAY-EMISSION OF THE PULSAR-BE STAR BINARY PSR-1259-63 SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, CLOSE; PULSARS, INDIVIDUAL (PSR 1259-63); STARS, EMISSION-LINE, BE; X-RAYS, STARS ID PULSATIONS; DISCOVERY; ACCRETION AB X-rays are detected from the pulsar-Be star binary PSR 1259-63 only after apastron passage. We suggest that the X-rays result from accretion onto the pulsar magnetosphere of matter captured from the Be star wind. The capture efficiency changes markedly at this phase, in line with the observations, provided that the wind is slow (approximately sonic) at large distances from the Be star. C1 SONOMA STATE UNIV,DEPT PHYS & ASTRON,ROHNERT PK,CA 94928. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA. RP KING, A (reprint author), UNIV LEICESTER,ASTRON GRP,LEICESTER LE1 7RH,LEICS,ENGLAND. NR 23 TC 25 Z9 25 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 NOV 1 PY 1994 VL 435 IS 1 BP 411 EP 415 DI 10.1086/174824 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA PP151 UT WOS:A1994PP15100038 ER PT J AU BAMBAUER, A BRANTNER, B PAIGE, M NOVAKOV, T AF BAMBAUER, A BRANTNER, B PAIGE, M NOVAKOV, T TI LABORATORY STUDY OF NO2 REACTION WITH DISPERSED AND BULK LIQUID WATER SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE CLOUD CHAMBER; AQUEOUS REACTIONS; NITRATE FORMATION ID NITRIC-ACID; NITROGEN-DIOXIDE; TROPOSPHERE; NITRATE; AIR AB We have studied the reaction 2NO2(g) + H2O(l) --> 2H+ + NO3- + NO2- with dispersed and bulk liquid water. The experiments were performed with a laboratory cloud chamber at conditions corresponding to the phase-mixed reaction regime, when the apparent reaction order with respect to NO2 should reflect the aqueous-phase reaction order. Parallel measurements with water bubblers were performed under conditions favoring the mass transport controlled regime. Our results show that the reaction is first order with respect to gaseous NO2 for both reaction regimes. These results differ from results obtained by other workers from experiments with a bulk water system (Lee and Schwartz, 1981 a,b, J. phys. Chem. 85, 840-848, J. geophys. Res. 86, 11,971-11,983), which showed reaction orders of 2 and 1, respectively, for the two regimes. Our results also demonstrate that NO2 reaction with acidified cloud droplets should be a source of gaseous HONO. Finally, we present preliminary evidence of a possible synergism between HNO3 and the uptake and oxidation of NO2 in cloud droplets. C1 LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,1 CYCLOTRON RD,BERKELEY,CA 94720. NR 14 TC 43 Z9 43 U1 0 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1994 VL 28 IS 20 BP 3225 EP 3232 DI 10.1016/1352-2310(94)00169-L PG 8 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA PW172 UT WOS:A1994PW17200004 ER PT J AU PARUNGO, F NAGAMOTO, C ZHOU, MY HANSEN, ADA HARRIS, J AF PARUNGO, F NAGAMOTO, C ZHOU, MY HANSEN, ADA HARRIS, J TI AEOLIAN TRANSPORT OF AEROSOL BLACK CARBON FROM CHINA TO THE OCEAN SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE AEROSOL BLACK CARBON; LONG-RANGE TRANSPORT; DEPOSITION ID METEOROLOGICAL DATA; SOUTH-POLE; PARTICLES; UNCERTAINTY; RESOLUTION; KUWAIT AB To investigate long-range transport of aerosol black carbon (BC) from China to the downwind seas and ocean, BC concentrations were measured in Beijing city, at a rural station near Beijing city, and at a rural station near Shanghai, for information about source strengths. Aerosol samples were also collected on board research ships in four cruises over the East China Sea and Western Pacific Ocean to determine BC distribution. The data were used to verify a simple one-dimensional transport model. In the marine boundary layer with prevailing westerlies of 5 m s-1, the BC total deposition rate, including both dry deposition and wet deposition, was computed as - 1 x 10(-5) s-1, and the half-life was estimated to be 19 h. The residence time was approximately 5 d, concentrations subsequently diminishing to the background level. Longer lifetime and farther transport would be probable in the free troposphere. Because BC particles have great surface areas and are very absorbent of electromagnetic waves, their concentration and distribution in the atmosphere may have profound effects on radiation budgets and climate change. C1 NATL RES CTR MARINE ENVIRONM FORECASTS,BEIJING,PEOPLES R CHINA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NOAA,CLIMATE MONITORING & DIAGNOST LAB,BOULDER,CO 80303. RP PARUNGO, F (reprint author), NOAA,AIR RESOURCES LAB,BOULDER,CO 80303, USA. NR 19 TC 68 Z9 73 U1 1 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1994 VL 28 IS 20 BP 3251 EP 3260 DI 10.1016/1352-2310(94)00164-G PG 10 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA PW172 UT WOS:A1994PW17200006 ER PT J AU HINDMAN, EE PORCH, WM HUDSON, JG DURKEE, PA AF HINDMAN, EE PORCH, WM HUDSON, JG DURKEE, PA TI SHIP-PRODUCED CLOUD LINES OF 13 JULY 1991 SO ATMOSPHERIC ENVIRONMENT LA English DT Note DE SHIP TRAILS; SHIP-PRODUCED CLOUDS; SHIP EFFLUENTS ID TOPPED BOUNDARY-LAYERS; CONDENSATION NUCLEI; STRATUS; TRAILS AB On 13 July 1991, a well-defined cloud line produced by an unidentified steaming ship was detected in satellite imagery and was simultaneously photographed from the R/V EGABRAG III. The EGABRAG produced a much less well-defined cloud line. Measuremnts made from the EGABRAG revealed that the cloud lines formed in a shallow boundary layer which was nearly saturated, unstable, drizzling and nearly free of cloud condensation nuclei (CCN). The EGABRAG passed through the plume of the ship as indicated by elevated CCN concentrations coincident with the cloud line. Thereafter, both ships passed under a shallow stratus layer where background CCN concentrations increased significantly. Only the cloud line produced by the ship extended into the stratus layer; the EGABRAG did not affect the layer. The CCN and updraft from the ship were involved in the formation of the cloud line. In contrast, the CCN and updraft from the EGABRAG were insufficient to produce a well-defined cloud line. Production of the cloud lines appeared dependent on a combination of environmental conditions and ship-produced CCN and updrafts. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. DESERT RES INST,RENO,NV 89506. USN,MONTEREY,CA 93940. RP HINDMAN, EE (reprint author), CUNY CITY COLL,NEW YORK,NY 10031, USA. NR 22 TC 20 Z9 20 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1994 VL 28 IS 20 BP 3393 EP 3403 DI 10.1016/1352-2310(94)00171-G PG 11 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA PW172 UT WOS:A1994PW17200017 ER PT J AU SOOD, PC HEADLY, DM SHELINE, RK HOFF, RW AF SOOD, PC HEADLY, DM SHELINE, RK HOFF, RW TI INTRINSIC AND ROTATIONAL LEVEL STRUCTURES IN ODD-ODD ACTINIDES SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID EVEN-EVEN NUCLEI; LYING 2-PARTICLE STATES; MODEL COULOMB ENERGIES; REFLECTION ASYMMETRY; RESIDUAL INTERACTION; SHELL-MODEL; A NUCLEI; DEFORMED-NUCLEI; BETA-DECAYS; BANDS AB Experimentally observed energy levels for odd-odd nuclei with 87 less than or equal to Z less than or equal to 103 and 129 less than or equal to N less than or equal to 159 are classified in terms of their intrinsic structures and associated rotational bands. Distinctive level patterns for different nuclear shapes are discussed. Parity-mixed level structures indicative of reflection-asymmetric (octupole-deformed) shapes are seen in N < 139 nuclides. For well-deformed nuclei, long-lived (t(1/2) greater than or equal to 1 s) isomer pairs are observed in several cases with no isomeric transition connecting the two isomers. Systematics of residual interaction effects, e.g., Gallagher-Moszkowski splittings and Newby shifts, are studied and features of interaction matrix elements are examined. Our literature cutoff date is September 1993. (C) 1994 Academic Press, Inc. C1 FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. BANARAS HINDU UNIV,DEPT PHYS,VARANASI 221005,UTTAR PRADESH,INDIA. LAWRENCE LIVERMORE NATL LAB,DIV NUCL CHEM,LIVERMORE,CA 94550. RP SOOD, PC (reprint author), FLORIDA STATE UNIV,DEPT CHEM,TALLAHASSEE,FL 32306, USA. NR 54 TC 26 Z9 26 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 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD NOV PY 1994 VL 58 IS 2 BP 167 EP 202 DI 10.1006/adnd.1994.1026 PG 36 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA PP878 UT WOS:A1994PP87800001 ER PT J AU BROWN, CM SEELY, JF KANIA, DR HAMMEL, BA BACK, CA LEE, RW BARSHALOM, A BEHRING, WE AF BROWN, CM SEELY, JF KANIA, DR HAMMEL, BA BACK, CA LEE, RW BARSHALOM, A BEHRING, WE TI WAVELENGTHS AND ENERGY-LEVELS FOR THE ZN-I ISOELECTRONIC SEQUENCE SN20+ THROUGH U62+ SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID RESONANCE LINES; CU-LIKE; IONS; SPECTRA; TRANSITIONS; PD AB Calculated and experimentally determined transition energies are presented for the Zn I isoelectronic sequence for the elements with atomic numbers Z = 50-92. The excitation energies were calculated for the 84 levels belonging to the 10 configurations of the type 4l4l' by using the Hebrew University Lawrence Livermore Atomic Code (HULLAC). The analysis of the energy level structure along the isoelectronic sequence accounted for 20 avoided level crossings. The differences between the calculated and experimental transition energies were determined for 16 transitions, and the excitation energies of the levels belonging to the 4s4p, 4p(2), 4s4d, and 4s4f configurations were derived from the semiempirically corrected transition energies. (C) 1994 Academic Press, Inc. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771. RP BROWN, CM (reprint author), USN,RES LAB,EO HULBURT CTR SPACE RES,CODE 7674,WASHINGTON,DC 20375, USA. NR 16 TC 39 Z9 40 U1 0 U2 5 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD NOV PY 1994 VL 58 IS 2 BP 203 EP 217 DI 10.1006/adnd.1994.1027 PG 15 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA PP878 UT WOS:A1994PP87800002 ER PT J AU HANDRON, K AF HANDRON, K TI AN EMPLOYEE ASSISTANCE PROGRAM APPROACH TO THE PREVENTION OF WORKPLACE MENTAL INJURY SO BEHAVIORAL HEALTHCARE TOMORROW LA English DT Article AB In response to a catastrophic workplace stress claim in 1981, Lawrence Berkeley Laboratory developed an integrated protocol to prevent and manage workplace mental stress injuries, claims and associated costs. Employees are referred to employee assistance program staff for early intervention, and the program uses a systems approach to problem solving. The result: while the incidence of work-related stress has increased, total claims costs in 1992 were about one-sixth the total from that single 1981 catastrophic case. RP HANDRON, K (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,EMPLOYEE ASSISTANCE & VOCAT REHABILITAT PROGRAMS,BERKELEY,CA, USA. NR 11 TC 0 Z9 0 U1 1 U2 1 PU CENTRALINK PI TIBURON PA 1110 MAR WEST ST STE E, TIBURON, CA 94920-1879 SN 1063-8490 J9 BEHAV HEALTHC TOM JI Behav. Healthcare Tomorrow PD NOV-DEC PY 1994 VL 3 IS 6 BP 21 EP & PG 0 WC Psychology, Clinical; Health Policy & Services SC Psychology; Health Care Sciences & Services GA QK162 UT WOS:A1994QK16200002 ER PT J AU FOX, BG SHANKLIN, J AI, JY LOEHR, TM SANDERSLOEHR, J AF FOX, BG SHANKLIN, J AI, JY LOEHR, TM SANDERSLOEHR, J TI RESONANCE RAMAN EVIDENCE FOR AN FE-O-FE CENTER IN STEAROYL-ACP DESATURASE - PRIMARY SEQUENCE IDENTITY WITH OTHER DIIRON-OXO PROTEINS SO BIOCHEMISTRY LA English DT Article ID MULTICOMPONENT PHENOL HYDROXYLASE; METHYLOSINUS-TRICHOSPORIUM OB3B; MONOOXYGENASE CATALYTIC CYCLE; PSEUDOMONAS SP STRAIN-CF600; DINUCLEAR IRON CENTERS; RIBONUCLEOTIDE REDUCTASE; METHANE MONOOXYGENASE; GENE-CLUSTER; NUCLEOTIDE-SEQUENCE; HIGHER-PLANTS AB The stearoyl-ACP Delta(9) desaturase from plants is a new example of a growing number of proteins that contain oxo- or hydroxo-bridged diiron clusters. On the basis of differences in primary sequence motifs providing the cluster ligands and upon structural differences elucidated by X-ray crystallography, we now propose that the presently known, soluble diiron-oxo proteins can be grouped into two classes, I and II. Class I contains hemerythrin, myohemerythrin, and, possibly, purple acid phosphatase. Class II contains ribonucleotide reductases, bacterial hydrocarbon hydroxylases (methane monooxygenase, toluene-4-monooxygenase, and phenol hydroxylase), rubrerythrin, and stearoyl-ACP desaturases. Through the use of resonance Raman spectroscopy, we have detected symmetric (v(s) = 519 cm(-1)) and asymmetric (v(as) = 747 cm(-1)) vibrational modes in the castor stearoyl-ACP Delta(9) desaturase, which are typical of ore-bridged diiron clusters. These frequencies shift by -18 and -34 cm(-1), respectively, in (H2O)-O-18, proving that the bridging ligand is readily exchangeable with solvent (t(1/2) = 7 min). Calculation of an similar to 123 degrees Fe-O-Fe angle from the position of v(s) and v(as) and from the O-18-dependent shift in these frequencies suggests that the diiron-oxo cluster in the desaturase is triply bridged in the diferric state. In the diferrous state, the two iron sites of the cluster are structurally inequivalent, as shown by differential temperature dependence of the Mossbauer quadrupole splittings. For the class II diiron-oxo proteins, primary sequence alignments reveal conserved amino acid residues which act as iron cluster ligands, participate in a hydrogen-bonding network, and are potentially involved in O-2 binding and activation. Based on this conservation, a structural model for the stearoyl-ACP Delta(9) desaturase active site is proposed that has strong similarity to both ribonucleotide reductase and methane monooxygenase. However, after single turnover of the diferrous state with O-18(2), O-18 is not detected in the oxo bridge of the castor desaturase. This is in contrast to the outcome observed for ribonucleotide reductase, suggesting the desaturase and ribonucleotide reductase differ in certain aspects of their respective O-2-activation reactions. C1 UNIV WISCONSIN, COLL AGR & LIFE SCI, DEPT BIOCHEM, MADISON, WI 53705 USA. BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA. OREGON GRAD INST SCI & TECHNOL, DEPT CHEM BIOCHEM & MOLEC BIOL, PORTLAND, OR 97291 USA. RP FOX, BG (reprint author), UNIV WISCONSIN, GRAD SCH, INST ENZYME RES, MADISON, WI 53705 USA. FU NIGMS NIH HHS [GM-18865] NR 66 TC 191 Z9 193 U1 1 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 1 PY 1994 VL 33 IS 43 BP 12776 EP 12786 DI 10.1021/bi00209a008 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PP527 UT WOS:A1994PP52700008 PM 7947683 ER PT J AU SHANKLIN, J WHITTLE, E FOX, BG AF SHANKLIN, J WHITTLE, E FOX, BG TI 8 HISTIDINE-RESIDUES ARE CATALYTICALLY ESSENTIAL IN A MEMBRANE-ASSOCIATED IRON ENZYME, STEAROYL-COA DESATURASE, AND ARE CONSERVED IN ALKANE HYDROXYLASE AND XYLENE MONOOXYGENASE SO BIOCHEMISTRY LA English DT Article ID CARRIER-PROTEIN DESATURASE; FATTY-ACID DESATURATION; PSEUDOMONAS-OLEOVORANS; HIGHER-PLANTS; GENE; EXPRESSION; SEQUENCE; CYANOBACTERIUM; PURIFICATION; SIMILARITIES AB The eukaryotic fatty acid desaturases are iron-containing enzymes that catalyze the NAD-(P)H- and O-2-dependent introduction of double bonds into methylene-interrupted fatty acyl chains. Examination of deduced amino acid sequences for the membrane desaturases from mammals, fungi, insects, higher plants, and cyanobacteria has revealed three regions of conserved primary sequence containing HX(3 ?(or 4)) H,HX((2 or 3)) HH, and HX((2 or 3)) HH. This motif is also present in the bacterial membrane enzymes alkane hydroxylase (omega-hydroxylase) and xylene monooxygenase. Hydropathy analyses indicate that these enzymes contain up to three long hydrophobic domains which would be long enough to span the membrane bilayer twice. The conserved His-containing regions have a consistent positioning with respect to these potential membrane spanning domains. Taken together, these observations suggest that the membrane fatty acid desaturases and hydrocarbon hydroxylases have a related protein fold, possibly arising from a common ancestral origin. In order to examine the functional role of these conserved His residues, we have made use of the ability of the rat Delta(9) desaturase gene to complement a yeast strain deficient in the Delta(9) desaturase gene function (ole1). By site-directed mutagenesis, eight conserved His residues in the rat Delta(9) desaturase were individually converted to Ala. Each His --> Ala mutation failed to complement the yeast ole1 mutant. In contrast, mutation of three nonconserved flanking His residues or a partially conserved Arg residue within the conserved motif to Ala allowed for complementation of the ole1 phenotype. Western blot analysis showed that steady-state expression levels were equivalent for the wild-type rat desaturase and for all mutants, suggesting that the conserved His residues are essential for catalytic function. One role for these His residues would be to act as ligands for the iron atom(s) contained in these enzymes. On the basis of these results and the presently available spectroscopic data, we recognize the possibility that the membrane desaturases, alkane hydroxylase, and xylene monooxygenase contain a new structural type of diiron center. C1 UNIV WISCONSIN,GRAD SCH,INST ENZYME RES,MADISON,WI 53705. UNIV WISCONSIN,COLL AGR & LIFE SCI,DEPT BIOCHEM,MADISON,WI 53705. RP SHANKLIN, J (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 45 TC 516 Z9 542 U1 4 U2 31 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 1 PY 1994 VL 33 IS 43 BP 12787 EP 12794 DI 10.1021/bi00209a009 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PP527 UT WOS:A1994PP52700009 PM 7947684 ER PT J AU OLAH, GA TREWHELLA, J AF OLAH, GA TREWHELLA, J TI A MODEL STRUCTURE OF THE MUSCLE PROTEIN COMPLEX 4CA2+-CENTER-DOT-TROPONIN-C-CENTER-DOT-TROPONIN-I DERIVED FROM SMALL-ANGLE SCATTERING DATA - IMPLICATIONS FOR REGULATION SO BIOCHEMISTRY LA English DT Article ID RABBIT SKELETAL-MUSCLE; AMINO-ACID-SEQUENCE; BIOLOGICAL-ACTIVITY; CROSS-LINKING; NEUTRON-SCATTERING; INHIBITORY REGION; CENTRAL HELIX; PEPTIDE COMPLEX; CALMODULIN; CONTRACTION AB We report here a model structure for 4Ca(2+)-troponin C-troponin I derived from small-angle X-ray and neutron scattering data using a Monte Carlo modeling method. In this model, troponin I appears as a spiral structure that wraps around 4Ca(2+) troponin C which adopts an extended dumbbell conformation similar to that observed in the crystal structures of troponin C. The troponin I spiral has the approximate dimensions of an alpha-helix and winds through the hydrophobic ''cups'' in each globular domain of troponin C. The model is consistent with a body of previously published biochemical data on the interactions between troponin C and troponin I, and suggests the molecular mechanism for the Ca2+-sensitive switch that regulates the muscle contraction/relaxation cycle involves a signal transmitted via the central spiral region of troponin I. C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. FU NIGMS NIH HHS [GM40528] NR 44 TC 97 Z9 99 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD NOV 1 PY 1994 VL 33 IS 43 BP 12800 EP 12806 DI 10.1021/bi00209a011 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA PP527 UT WOS:A1994PP52700011 PM 7947685 ER PT J AU EASTERLY, CE AF EASTERLY, CE TI A PERSPECTIVE ON ELECTROMAGNETIC-FIELD BIOEFFECTS AND RISK ASSESSMENT SO BIOELECTROCHEMISTRY AND BIOENERGETICS LA English DT Article; Proceedings Paper CT 2nd Congress of the European-Bioelectromagnetics-Association CY DEC 09-11, 1993 CL BLED, SLOVENIA SP EUROPEAN BIOELECTROMAGNET ASSOC DE ELECTROMAGNETIC FIELD BIOEFFECTS; RELATIVE POTENCY CONCEPTS ID ALTERNATING MAGNETIC-FIELD; MALE BREAST-CANCER; CHILDHOOD LEUKEMIA; TUMOR-DEVELOPMENT; MYELOID-LEUKEMIA; INHALED BENZENE; POWER-LINES; MOUSE-SKIN; EXPOSURE; PROMOTION AB There is evidence to suspect that a human health risk could exist from exposure to power frequency electromagnetic fields (EMFs). Summary analyses of epidemiological evidence suggest that, if the effects seen are real, they are small, with relative risks of the order 1.5-2.5. The past several years of epidemiological results are consistent with those of previous years, but do not add markedly to the understanding of potential human health risk. A similar situation has existed with benzene. Health concerns for benzene originated in the workplace with case reports. For many years, epidemiology studies alone provided the information on risks from benzene; until recently, animal models did not yield any tumors. Finally after 50 years of laboratory studies, an animal model provided tumors, but not the primary one associated with benzene exposure to humans. A brief history of the benzene story is presented to provide a perspective on the progress in understanding the potential risk of EMFs. Radon and toxic chemicals, which are present in indoor air, have been examined qualitatively only in a few EMF epidemiological studies. Because these materials have the potential to overshadow any signal coming from EMF exposures, they must be treated quantitatively. No classical cancer studies have been completed as yet for EMFs, but a variety of promotion or copromotion animal studies have been reported. Results of these and other studies lend support for consideration of EMF not being a complete carcinogen, but possibly a promoter. Qualitatively, whole animal studies, together with results of epidemiological works, suggest that greater intensities (magnetic flux densities) may be associated with greater responses (or lower p values). Other laboratory studies have been designed to examine more basic mechanisms, but the use of these types of studies in risk assessment is not straightforward. A methodology, based on relative potency concepts, is introduced; it can be used to assist in the assessment of the degree of hazard which EMF poses. EMF researchers can contribute to the use of this type of analysis by including positive controls in their experimental designs. RP EASTERLY, CE (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,POB 2008,MAIL STOP 6101,OAK RIDGE,TN 37831, USA. NR 75 TC 3 Z9 3 U1 2 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0302-4598 J9 BIOELECTROCH BIOENER JI Bioelectrochem. Bioenerg. PD NOV PY 1994 VL 35 IS 1-2 BP 1 EP 11 PG 11 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA PR995 UT WOS:A1994PR99500003 ER PT J AU BAKHTIAR, R WU, Q HOFSTADLER, SA SMITH, RD AF BAKHTIAR, R WU, Q HOFSTADLER, SA SMITH, RD TI CHARGE-STATE SPECIFIC FACILE GAS-PHASE CLEAVAGE OF ASP-75 MET-76 PEPTIDE-BOND IN THE ALPHA-CHAIN OF HUMAN APOHEMOGLOBIN PROBED BY ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY SO BIOLOGICAL MASS SPECTROMETRY LA English DT Note ID SEQUENCE INFORMATION; LARGE MOLECULES; PROTEINS; DISSOCIATION; IONS; ACID AB Herein, we present the first example of charge state specific facile gas-phase cleavage of an aspartic acid-methionine peptide linkage. This cleavage (Asp 75-Met 76) was observed in the (a)lpha-chain of human adult hemoglobin (Hb) and was probed by electrospray ionization mass spectrometry. This specific conformational and/or charge density dependent dissociation was observed primarily in the [M + 11H](11+) and [M + 12H](12+) species. A mechanism involving an intramolecular proton transfer from the protonated carboxyl side chain of Asp 75 to the neighboring Met 76 residue yielding an anhydride moiety at the C-terminal of the Asp 75 is proposed. Dramatic differences in dissociation of [M + 13H](13+) and [M + 14H](14+) species were observed. C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 20 TC 37 Z9 37 U1 0 U2 4 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1052-9306 J9 BIOL MASS SPECTROM JI Biol. Mass Spectrom. PD NOV PY 1994 VL 23 IS 11 BP 707 EP 710 DI 10.1002/bms.1200231110 PG 4 WC Biophysics; Spectroscopy SC Biophysics; Spectroscopy GA PP967 UT WOS:A1994PP96700009 PM 7811760 ER PT J AU SAVIKHIN, S STRUVE, WS AF SAVIKHIN, S STRUVE, WS TI FEMTOSECOND PUMP-PROBE SPECTROSCOPY OF BACTERIOCHLOROPHYLL A MONOMERS IN SOLUTION SO BIOPHYSICAL JOURNAL LA English DT Article ID PICOSECOND SOLVATION; ENERGY-TRANSFER; SOLVENTS; DYNAMICS; RELAXATION; RESOLUTION; MOLECULES; PROTEIN AB One- and two-color absorption difference profiles were obtained for BChl a in I-propanol with similar to 50-fs resolution, using a self-mode-locked Ti:sapphire laser system. Time evolution in the BChl a absorption difference spectrum produces nonexponential photobleaching/stimulated emission (PB/SE) decay kinetics in 800-nm one-color experiments. Nonexponential PB/SE rise behavior occurs for some combinations of pump and probe wavelengths in two-color experiments. Optimized parameters from triexponential fits to the absorption difference profiles depend markedly on the fitting time window; they typically include a minor component with lifetime in the hundreds of fs. Much of the latter component is due to vibrational relaxation and/or intramolecular vibrational redistribution, rather than solvent dielectric relaxation. Measurements of the pump-probe anisotropy indicate that the electronic transition moment for the broad Q(y) excited state absorption band that overlaps the Q(y) steady-state absorption spectrum makes an angle of at most 20 degrees from that of the ground --> Q(y) state transition. No coherent oscillations are observed at early times. Our results bear directly on the interpretation of fs pump-probe experiments on BChl a - containing pigment-protein complexes. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. US DOE,AMES LAB,AMES,IA 50011. NR 20 TC 37 Z9 37 U1 2 U2 6 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD NOV PY 1994 VL 67 IS 5 BP 2002 EP 2007 PG 6 WC Biophysics SC Biophysics GA PP459 UT WOS:A1994PP45900024 PM 7858137 ER PT J AU SAXTON, MJ AF SAXTON, MJ TI SINGLE-PARTICLE TRACKING - MODELS OF DIRECTED TRANSPORT SO BIOPHYSICAL JOURNAL LA English DT Article ID LATERAL DIFFUSION; NANOVID MICROSCOPY; MEMBRANE FLOW; MOBILITY; MOVEMENTS; RECEPTORS; CLUSTERS; CELLS; SHAPE AB Single-particle tracking techniques make it possible to measure motion of individual particles on the cell surface. In these experiments, individual trajectories are observed, so the data analysis must take into account the randomness of individual random walks. Methods of data analysis are discussed for models combining diffusion and directed motion. In the uniform flow model, a tracer simultaneously diffuses and undergoes directed motion. In the conveyor belt model, a tracer binds and unbinds to a uniform conveyor belt moving with constant velocity. If a tracer is bound, it moves at the velocity of the conveyor belt; if it is unbound, it diffuses freely. Trajectories are analyzed using parameters that measure the extent and asymmetry of the trajectory. A method of assessing the usefulness of such parameters is presented, and pitfalls in data analysis are discussed. Joint probability distributions of pairs of extent and asymmetry parameters are obtained for a pure random walk. These distributions can be used to show that a trajectory is not likely to have resulted from a pure random walk. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CHEM BIODYNAM LAB,BERKELEY,CA 94720. RP SAXTON, MJ (reprint author), UNIV CALIF DAVIS,INST THEORET DYNAM,DAVIS,CA 95616, USA. FU NIGMS NIH HHS [GM38133] NR 22 TC 54 Z9 54 U1 2 U2 7 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD NOV PY 1994 VL 67 IS 5 BP 2110 EP 2119 PG 10 WC Biophysics SC Biophysics GA PP459 UT WOS:A1994PP45900035 PM 7858148 ER PT J AU HWANG, HM LOYA, JA PERRY, DL SCHOLZE, R AF HWANG, HM LOYA, JA PERRY, DL SCHOLZE, R TI INTERACTIONS BETWEEN SUBSURFACE MICROBIAL ASSEMBLAGES AND MIXED ORGANIC AND INORGANIC CONTAMINANT SYSTEMS SO BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY LA English DT Article ID GROUND-WATER; ADAPTATION; DEGRADATION; SITE C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. USA,CONSTRUCT ENGN RES LAB,CHAMPAIGN,IL 61824. RP HWANG, HM (reprint author), JACKSON STATE UNIV,DEPT BIOL,JACKSON,MS 39217, USA. FU NIGMS NIH HHS [SO6GM08047] NR 14 TC 3 Z9 5 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0007-4861 J9 B ENVIRON CONTAM TOX JI Bull. Environ. Contam. Toxicol. PD NOV PY 1994 VL 53 IS 5 BP 771 EP 778 PG 8 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA PH793 UT WOS:A1994PH79300021 PM 7833616 ER PT J AU MCLAUGHLIN, SB BLASING, TJ DOWNING, DJ AF MCLAUGHLIN, SB BLASING, TJ DOWNING, DJ TI 200-YEAR VARIATION OF SOUTHERN RED SPRUCE RADIAL GROWTH AS ESTIMATED BY SPECTRAL-ANALYSIS - COMMENT SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Discussion ID GREAT-SMOKY-MOUNTAINS; EASTERN-UNITED-STATES; FIR FORESTS; DECLINE; DEPOSITION; POPULATIONS; PREVALENCE; FOLIAGE RP MCLAUGHLIN, SB (reprint author), OAK RIDGE NATL LAB,ENVIRONM SCI LAB,POB 2008,OAK RIDGE,TN 37831, USA. RI Blasing, T/B-9498-2012 NR 39 TC 1 Z9 1 U1 0 U2 1 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0045-5067 J9 CAN J FOREST RES JI Can. J. For. Res.-Rev. Can. Rech. For. PD NOV PY 1994 VL 24 IS 11 BP 2299 EP 2304 DI 10.1139/x94-296 PG 6 WC Forestry SC Forestry GA QE426 UT WOS:A1994QE42600021 ER PT J AU SIMON, I OLINS, DE AF SIMON, I OLINS, DE TI HIGHER-ORDER ASSOCIATION OF EXTRACHROMOSOMAL RIBOSOMAL-RNA GENES IN DICTYOSTELIUM-DISCOIDEUM SO CELL BIOLOGY INTERNATIONAL LA English DT Note ID RIBOSOMAL-RNA GENES; POLYMERASE-I; TOPOISOMERASE-I; TRANSCRIPTION; NUCLEOLUS; CHROMATIN; CELLS; SITES C1 UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. HEBREW UNIV EIN KEREM,HADASSAH MED SCH,DEPT BIOCHEM MED,IL-91120 JERUSALEM,ISRAEL. NR 14 TC 5 Z9 5 U1 0 U2 0 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 1065-6995 J9 CELL BIOL INT JI Cell Biol. Int. PD NOV PY 1994 VL 18 IS 11 BP 1091 EP 1094 DI 10.1006/cbir.1994.1033 PG 4 WC Cell Biology SC Cell Biology GA QA646 UT WOS:A1994QA64600011 PM 7894392 ER PT J AU STIMAC, J HICKMOTT, D AF STIMAC, J HICKMOTT, D TI TRACE-ELEMENT PARTITION-COEFFICIENTS FOR ILMENITE, ORTHO-PYROXENE AND PYRRHOTITE IN RHYOLITE DETERMINED BY MICRO-PIXE ANALYSIS SO CHEMICAL GEOLOGY LA English DT Article ID RARE-EARTH ELEMENTS; HIGH-SILICA RHYOLITES; NUCLEAR MICROPROBE; MARE BASALTS; CRATER LAKE; CLEAR-LAKE; TI; MAGMAS; EVOLUTION; MINERALS AB Ilmenite is a common accessory mineral in igneous and metamorphic rocks, yet few data are available on its partitioning behavior. We present in situ proton-induced X-ray emission (PIXE) microanalytical data for ilmenite (Ilm), orthopyroxene (Opx), pyrrhotite (Po) and coexisting silicic glass in a rhyolite lava from Clear Lake, California. The rhyolite contains grains of Ilm (X(ilm)=0.96-1.00) associated with Opx and Flag phenocrysts. Po occurs as inclusions in Ilm and Opx, and as rare single grains. Ilmenite concentrates Nb (D=51-71), Ta (64-85), Zn (10-11), Mo (>5) and Zr (1.0-1.4). Opx concentrates Ni (D=similar to 11-25) and Zn (14-16). Po concentrates Mo (D=similar to 161), As (2-3), Se (similar to 36-44), Pb (2), Co (similar to 999), Cu (similar to 459-502) and Ni (similar to 1842) relative to silicic melt, but these coefficients may reflect liquid/liquid rather than solid/liquid partitioning. Ilmenite is the dominant oxide in Clear Lake volcanic rocks, occurring in silicic to intermediate lavas and metasedimentary xenoliths. Silicic volcanic rocks of the area formed by interaction of mafic magmas with deep crustal rocks. The dominance of ilmenite over magnetite reflects the bulk composition and low f(O2) of a metasedimentary source component. The relative abundance of ilmenite in such systems and its high D-Nb- and D-Ta-values suggest that it will strongly influence Nb and Ta concentrations during partial melting of crustal rocks and during crystal fractionation. Similarly Po will exert an important influence on the distribution of chalcophile and siderophile elements. Ilm and Po must be considered in quantitative fractionation models involving HFSE and metals, even if present in trace abundances. RP STIMAC, J (reprint author), LOS ALAMOS NATL LAB,EES-1,MS-D462,LOS ALAMOS,NM 87545, USA. RI Hickmott, Donald/C-2886-2011 NR 74 TC 54 Z9 54 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD NOV 1 PY 1994 VL 117 IS 1-4 BP 313 EP 330 DI 10.1016/0009-2541(94)90134-1 PG 18 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA PW133 UT WOS:A1994PW13300017 ER PT J AU TANG, J AF TANG, J TI ELECTRON-TRANSFER REACTIONS INVOLVING NONLINEAR SPIN-BOSON INTERACTIONS SO CHEMICAL PHYSICS LA English DT Article ID ENERGY-GAP LAW; POLAR-SOLVENTS; BIOLOGICAL MOLECULES; DIELECTRIC FRICTION; SOLVATION DYNAMICS; LIOUVILLE-SPACE; QUANTUM MODES AB Effects of electron transfer reactions involving non-linear spin-boson interactions are examined. An analytical rate formula is derived as a convoluted integral of the Franck-Condon kernel for each mode of nuclear motion whether it is low or high frequency. For a dominant solvent mode at low frequency, the formula is equivalent to the results of the stochastic Liouville approach. Asymmetry of the Marcus rate plot between the normal and the inverted regions is illustrated. The validity of using the concept of ''collapsing'' multi-dimensional reaction coordinates into one effective reaction coordinate is discussed. The Duschinsky rotation is included in this generalized spin-boson model. RP TANG, J (reprint author), ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. RI Tang, Jau/D-8382-2012 OI Tang, Jau/0000-0003-2078-1513 NR 49 TC 21 Z9 21 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 EI 1873-4421 J9 CHEM PHYS JI Chem. Phys. PD NOV 1 PY 1994 VL 188 IS 2-3 BP 143 EP 160 DI 10.1016/0301-0104(94)00254-1 PG 18 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA PP113 UT WOS:A1994PP11300003 ER PT J AU DOUGLAS, EP LANGLOIS, DA BENICEWICZ, BC AF DOUGLAS, EP LANGLOIS, DA BENICEWICZ, BC TI SYNTHESIS, PHASE-BEHAVIOR, AND CURING STUDIES OF BISACETYLENE RIGID-ROD THERMOSETS SO CHEMISTRY OF MATERIALS LA English DT Article ID LIQUID-CRYSTAL THERMOSETS; POLYMERIZATION; CONFORMATION; MOLECULES; POLYMERS AB We have synthesized a series of rigid-rod bisacetylene thermosets from 4-ethynylbenzoyl chloride and various substituted dihydroxy aromatic compounds. The resulting thermoset monomers can show no melting transition, a crystal-to-nematic transition, or a crystal-to-isotropic transition, depending on the substituent and the central aromatic group. Molecular modeling was used to explain this phase behavior. The observed transitions are determined by a balance between molecular linearity, substituent bulkiness, and intermolecular interactions. Optical microscopy was used to observe phase behavior during thermal curing. Nematic monomers can be cured in the liquid-crystalline melt to give a cross-linked solid that retains the nematic order. Qualitatively, the phase behavior during cure follows a generalized nonequilibrium phase diagram for liquid-crystal thermosets. Quantitative measurements of the curing kinetics were performed using Raman spectroscopy. Comparisons between isomeric compounds which melted into either a nematic phase or an isotropic phase show that the curing reaction occurs faster in the nematic phase by up to 126%. RP DOUGLAS, EP (reprint author), LOS ALAMOS NATL LAB,POLYMERS & COATINGS GRP,LOS ALAMOS,NM 87545, USA. OI Benicewicz, Brian/0000-0003-4130-1232 NR 35 TC 35 Z9 35 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD NOV PY 1994 VL 6 IS 11 BP 1925 EP 1933 DI 10.1021/cm00047a007 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA PT274 UT WOS:A1994PT27400007 ER PT J AU ONG, EW ECKERT, J DOTSON, LA GLAUNSINGER, WS AF ONG, EW ECKERT, J DOTSON, LA GLAUNSINGER, WS TI NATURE OF GUEST SPECIES WITHIN ALKALINE-EARTH AMMONIA INTERCALATES OF TITANIUM DISULFIDE SO CHEMISTRY OF MATERIALS LA English DT Article ID DEINTERCALATION; SPECTROMETER; DIFFRACTION; TRANSITION; COMPLEXES; TIS2; NMR; NH3 AB Alkaline earth-ammonia intercalated compounds of lamellar titanium disulfide have been investigated using thermogravimetric analysis, differential scanning calorimetry, X-ray photoelectron spectroscopy, evolved gas analysis, and inelastic neutron-scattering spectroscopy. Two energetically distinguishable molecular ammonia species, one weakly bound and the other complexed with alkaline earth cations, were found to coexist with metal and ammonium cations. The energies required to deintercalate these species are 13, 19, and 22 kcal/mol, respectively. Vibrational motions associated with complexed ammonia were observed in addition to those from uncomplexed ammonia. The weakly bound NH3 exhibited vibrational bands at 290 and 345 cm-1. The most prominent vibrational modes for the complexed ammonia were the NH3 torsion and rock whose frequencies were 167 and 470 cm-1, respectively, in the calcium intercalates. A change in the cation from Ca2+ to Sr2+ to Ba2+ resulted in a shift of the NH3 rocking mode frequency from 470 to 460 to 425 cm-1, respectively. In this work the nature of the guest species in TiS2 has been thoroughly characterized, and strong evidence is presented for the existence of distinct molecular ammonia species. C1 ARIZONA STATE UNIV,DEPT CHEM & BIOCHEM,TEMPE,AZ 85287. RP ONG, EW (reprint author), LOS ALAMOS NATL LAB,LANSCE,MAIL STOP H805,LOS ALAMOS,NM 87545, USA. NR 26 TC 9 Z9 9 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD NOV PY 1994 VL 6 IS 11 BP 1946 EP 1954 DI 10.1021/cm00047a010 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA PT274 UT WOS:A1994PT27400010 ER PT J AU HENRIKSEN, GL DELUCA, WH VISSERS, DR AF HENRIKSEN, GL DELUCA, WH VISSERS, DR TI ADVANCED BATTERIES FOR ELECTRIC VEHICLES SO CHEMTECH LA English DT Article C1 ARGONNE NATL LAB,ELECTROCHEM ANAL & DIAGNOST LAB,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM TECHNOL,ELECTROCHEM TECHNOL PROGRAM,ARGONNE,IL 60439. RP HENRIKSEN, GL (reprint author), ARGONNE NATL LAB,LITHIUM IRON SULFIDE BATTERY R&D PROJECT,ARGONNE,IL 60439, USA. 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 0009-2703 J9 CHEMTECH JI Chemtech PD NOV PY 1994 VL 24 IS 11 BP 32 EP 38 PG 7 WC Chemistry, Applied SC Chemistry GA PU064 UT WOS:A1994PU06400009 ER PT J AU JODY, BJ DANIELS, EJ BROCKMEIER, NF AF JODY, BJ DANIELS, EJ BROCKMEIER, NF TI RECOVERING CAR PLASTICS SO CHEMTECH LA English DT Article RP JODY, BJ (reprint author), ARGONNE NATL LAB,DIV ENERGY SYST,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0009-2703 J9 CHEMTECH JI Chemtech PD NOV PY 1994 VL 24 IS 11 BP 41 EP 44 PG 4 WC Chemistry, Applied SC Chemistry GA PU064 UT WOS:A1994PU06400010 ER PT J AU LAMERS, C SCHONFELD, C SHAPIRO, SM BATOULIS, J TIMMERMANN, R CABLE, JW RICHTER, D AF LAMERS, C SCHONFELD, C SHAPIRO, SM BATOULIS, J TIMMERMANN, R CABLE, JW RICHTER, D TI SHORT-RANGE ORDER EFFECTS IN AMORPHOUS POLYCONDENSATES AS STUDIED BY SPIN-POLARIZED DIFFUSE NEUTRON-SCATTERING AND SIMULATION SO COLLOID AND POLYMER SCIENCE LA English DT Article DE POLYCARBONATE; PARTIAL STRUCTURE FACTORS; NEUTRON SCATTERING; SIMULATION ID MOLECULAR-DYNAMICS SIMULATION; BISPHENOL-A POLYCARBONATE; DISSOLVED POLYCARBONATES; LOCAL MOTION; X-RAY; GLASSY POLYCARBONATE; CHEMICAL-STRUCTURE; POLYMER-CHAINS; RELAXATION; MODEL AB Short-range order effects in amorphous polycondensates, including the technologically important bisphenol-A-polycarbonate, have been investigated by elastic diffuse neutron scattering with spin polarization analysis. Selectively deuterated samples of each polycondensate have been used in order to vary the scattering contrast and thereby emphasize different pair correlations. The technique of spin polarization analysis allowed a reliable separation of the coherent scattering and an intensity calibration on the basis of the incoherent scattering as an internal standard. Thus, (d sigma/d Omega)(coh) has been measured directly by this method. The experimental results are compared to calculated cross-sections from computer-generated structures. Simulations have been performed with the ''amorphous cell'' method which models the static structure of the amorphous polymer in full chemical detail on the basis of a ''random coil'' conformation. The results of the simulations yield a fertile ground for the discussion of the measured cross-sections, though a direct comparison with the experiment is not always satisfactory. The observed discrepancies indicate a still insufficient structural relaxation of the simulated structures. C1 FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY. OAK RIDGE NATL LAB, OAK RIDGE, TN USA. BAYER AG, W-5090 LEVERKUSEN, GERMANY. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RI Richter, Dieter/H-3701-2013 OI Richter, Dieter/0000-0003-0719-8470 NR 62 TC 3 Z9 3 U1 1 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0303-402X J9 COLLOID POLYM SCI JI Colloid Polym. Sci. PD NOV PY 1994 VL 272 IS 11 BP 1403 EP 1419 DI 10.1007/BF00654171 PG 17 WC Chemistry, Physical; Polymer Science SC Chemistry; Polymer Science GA PT793 UT WOS:A1994PT79300011 ER PT J AU NABER, JD SIEBERS, DL DIJULIO, SS WESTBROOK, CK AF NABER, JD SIEBERS, DL DIJULIO, SS WESTBROOK, CK TI EFFECTS OF NATURAL-GAS COMPOSITION ON IGNITION DELAY UNDER DIESEL CONDITIONS SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA ID MIXTURES; METHANE; ETHANE AB Effects of variations in natural gas composition on the autoignition of natural gas under direct-injection (DI) diesel engine conditions were studied experimentally in a constant-volume combustion vessel and computationally using a chemical kinetic model. Four fuel blends were investigated: pure methane, a capacity-weighted mean natural gas, a high-ethane-content natural gas, and a natural gas with added propane typical of peak shaving conditions. Experimentally measured ignition delays were longest for pure methane and became progressively shorter as ethane and propane concentrations increased. At conditions characteristic of a DI compression ignition natural gas engine at Top Dead Center (CR = 23:1, p = 6.8 MPa, T = 1150 K), measured ignition delays for the four fuels varied from 1.8 ms for the peak shaving and high ethane gases to 2.7 ms for pure methane. A computational model, incorporating detailed chemical kinetics of oxidation of methane, ethane, propane and other small hydrocarbons was used to predict the influences of fuel composition on ignition, focusing on the four fuel types considered in the experimental study. Numerically predicted variations in ignition delay as a function of natural gas composition agreed with these measurements. The model results are used to interpret the kinetic factors responsible for the observations. C1 CALIF STATE UNIV NORTHRIDGE,SCH ENGN & COMP SCI,DEPT MECH ENGN,NORTHRIDGE,CA 91330. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP NABER, JD (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 18 TC 54 Z9 58 U1 0 U2 10 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 192 EP 200 DI 10.1016/0010-2180(94)90122-8 PG 9 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000002 ER PT J AU RANZI, E SOGARO, A GAFFURI, P PENNATI, G WESTBROOK, CK PITZ, WJ AF RANZI, E SOGARO, A GAFFURI, P PENNATI, G WESTBROOK, CK PITZ, WJ TI NEW COMPREHENSIVE REACTION-MECHANISM FOR COMBUSTION OF HYDROCARBON FUELS SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA ID SHOCK-TUBE; METHANOL OXIDATION; KINETIC DATA; ACETALDEHYDE; CHEMISTRY; PYROLYSIS; IGNITION; FLAMES; ETHANE; MODEL AB A detailed chemical kinetic model has been developed that accurately describes pyrolysis, ignition and oxidation of many small hydrocarbon fuels over a wide range of experimental conditions. Fuels include carbon monoxide and hydrogen methane, and other alkane species up to rt-butane, ethylene, propene, acetylene, and oxygenated species such as methanol, acetaldehyde, and ethanol. Formation of some larger intermediate and product species including benzene, butadiene, large olefins, and cyclopentadiene has been treated in a semiempirical manner. The reaction mechanism has been tested for conditions that do not involve transport and diffusional processes, including plug flow and stirred reactors, batch reactors and shock tubes. The present kinetic model and its validation differ from previous comprehensive detailed reaction mechanisms in two important ways. First, in addition to conventional combustion data, experiments more commonly associated with chemical engineering problems such as oxidative coupling, oxidative pyrolysis and steam cracking are used to test the reaction mechanism, making it even more general than previous models. In addition, II-atom abstraction and some other reaction rates, even for the smaller C-2, C-3, and C-4 species, are treated using approximations that facilitate future extensions to larger fuels in a convenient manner. The construction of the reaction mechanism and selected comparisons with experimental data are described that illustrate the generality of the model. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. POLITECN MILAN,DIPARTIMENTO CHIM IND & INGN CHIM,I-20133 MILAN,ITALY. RI Pennati, Giancarlo/F-6584-2013; Ranzi, Eliseo/L-2366-2013; OI Ranzi, Eliseo/0000-0002-1395-6074 NR 58 TC 69 Z9 69 U1 2 U2 38 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 201 EP 211 DI 10.1016/0010-2180(94)90123-6 PG 11 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000003 ER PT J AU CICCARELLI, G GINSBERG, T BOCCIO, J ECONOMOS, C SATO, K KINOSHITA, M AF CICCARELLI, G GINSBERG, T BOCCIO, J ECONOMOS, C SATO, K KINOSHITA, M TI DETONATION CELL-SIZE MEASUREMENTS AND PREDICTIONS IN HYDROGEN-AIR-STEAM MIXTURES AT ELEVATED-TEMPERATURES SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA AB The effect of initial mixture temperature on the experimentally measured detonation cell size for hydrogen-air-steam mixtures at 0.1 MPa has been investigated. Experiments were carried out in a 10-cm-inner-diameter, 6.1-m-long heated detonation tube with a maximum operating temperature of 700 K and spatial temperature uniformity of +/-14 K. Detonation cell size measurements provide clear evidence that the effect of hydrogen-air initial gas mixture temperature, in the range 300-650 K, is to decrease cell size and, hence, to increase the sensitivity of the mixture to undergo detonations. The effect of steam content, at any given temperature, is to increase the cell size and, thereby, to decrease the sensitivity of stoichiometric hydrogen-air mixtures. The hydrogen-air detonability limits for the 10-cm-inside-diameter test vessel, based upon the onset of single-head spin, decreased from 15% hydrogen at 300 K down to about 9% hydrogen at 650 K. The experimental detonation cell size data were correlated using a Zeldovich-von Neumann-Doring (ZND) model for the detonation using detailed chemical-kinetic reaction mechanisms. The proportionality constants used to scale the reaction zone length calculations from the ZND model varied from 30 to 51 for the hydrogen-air cell size data at 650 and 300 K, respectively. RP CICCARELLI, G (reprint author), BROOKHAVEN NATL LAB,DEPT ADV TECHNOL,DIV SAFETY & RISK EVALUAT,UPTON,NY 11973, USA. NR 10 TC 33 Z9 33 U1 1 U2 7 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 212 EP 220 DI 10.1016/0010-2180(94)90124-4 PG 9 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000004 ER PT J AU MARGOLIS, SB AF MARGOLIS, SB TI THE NONLINEAR DYNAMICS OF INTRINSIC ACOUSTIC-OSCILLATIONS IN A MODEL PULSE COMBUSTOR SO COMBUSTION AND FLAME LA English DT Article; Proceedings Paper CT 25th International Symposium on Combustion CY JUL 31-AUG 05, 1994 CL IRVINE, CA AB The appearance of nonlinear acoustic oscillations in pulse combustors and other unsteady combustion devices arises from combustion-driven instabilities that excite one or more classical acoustic modes of the system. For sufficiently strong acoustic driving relative to various damping processes, these disturbances grow to finite amplitudes and, owing to the nonlinear coupling between linearly unstable and stable modes, a stable limit-cycle oscillation is typically established. The nonlinear dynamics of these oscillations are formally governed by an infinitely coupled system of evolution equations for the complex mode amplitudes. The linear terms determine the relative growth and decay rates of infinitesimal perturbations, while the nonlinear coupling terms determine the ultimate amplitude of each mode. The present work describes the nonlinear acoustic response of the system by obtaining approximate analytical and numerical solutions of the dynamical system of amplitude equations. In particular, it is shown that, depending on the value of a reduced driving parameter, various finite-mode approximations to the full infinitely coupled system may be employed to describe the acoustic response of the model. The nature of acoustic mode interactions is also investigated, and it is formally demonstrated that a resonance-like coupling exists between any growing mode, whose frequency is omega(j), and its first resonant harmonic, which is the mode whose frequency is 3 omega(j). Thus, the first acoustic bifurcation of the system occurs at a critical value of the driving parameter for which some mode achieves a positive linear growth rate, and is governed by a decoupled subsystem for the two modes corresponding to these frequencies. At larger values of the driving parameter, a second mode may achieve a positive linear growth rate, which in turn may produce a secondary transition in the acoustic response. The results for two cases, corresponding to whether or not one growing mode is the first resonant harmonic of the other, are discussed in terms of the minimal number of modes required to correctly predict the nonlinear acoustic behavior of the system. RP MARGOLIS, SB (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 10 TC 12 Z9 12 U1 0 U2 3 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD NOV PY 1994 VL 99 IS 2 BP 311 EP 322 DI 10.1016/0010-2180(94)90136-8 PG 12 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA PR020 UT WOS:A1994PR02000016 ER PT J AU LAURSEN, TA GOVINDJEE, S AF LAURSEN, TA GOVINDJEE, S TI A NOTE ON THE TREATMENT OF FRICTIONLESS CONTACT BETWEEN NONSMOOTH SURFACES IN FULLY NONLINEAR PROBLEMS SO COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING LA English DT Article ID TANGENT STIFFNESS AB An approach is presented for the formulation of the unilateral contact constraint in the presence of contact surface discontinuities. Such discontinuities may be due to physical corners on the surfaces of contacting bodies, or may be introduced by a discretization process (e.g. finite elements). It is asserted that a strong analogy exists between this problem and the one describing inelastic evolution in the presence of a discontinuous yield surface. This analogy is exploited to produce an effective treatment of the frictionless corner problem, complete with an effective augmented Lagrangian implementation for accurate constraint enforcement. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP LAURSEN, TA (reprint author), DUKE UNIV,SCH ENGN,DEPT CIVIL & ENVIRONM ENGN,DURHAM,NC 27706, USA. RI Govindjee, Sanjay/B-6886-2008; OI Govindjee, Sanjay/0000-0003-0711-3633; Laursen, Tod/0000-0003-4704-7730 NR 8 TC 11 Z9 11 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1069-8299 J9 COMMUN NUMER METH EN JI Commun. Numer. Methods Eng. PD NOV PY 1994 VL 10 IS 11 BP 869 EP 878 DI 10.1002/cnm.1640101103 PG 10 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA PV257 UT WOS:A1994PV25700002 ER PT J AU RAMSHAW, JD AF RAMSHAW, JD TI NUMERICAL VISCOSITIES OF DIFFERENCE-SCHEMES SO COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING LA English DT Article AB Numerical visocisities of finite-difference schemes are usually obtained from truncation-error analyses based on Taylor series expansions. Here we observe that numerical viscosities can also be obtained very simply and directly from the growth factor xi in a conventional Fourier stability analysis. A general formula is derived for the numerical viscosity in terms of the first and second derivatives of xi with respect to the wavenumber k, evaluate at k = 0. A single Fourier analysis therefore suffices to determine both stability limits and numerical viscosities. RP RAMSHAW, JD (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1069-8299 J9 COMMUN NUMER METH EN JI Commun. Numer. Methods Eng. PD NOV PY 1994 VL 10 IS 11 BP 927 EP 931 DI 10.1002/cnm.1640101108 PG 5 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA PV257 UT WOS:A1994PV25700007 ER PT J AU SIMUNOVIC, S SAIGAL, S AF SIMUNOVIC, S SAIGAL, S TI FRICTIONAL CONTACT FORMULATION USING QUADRATIC-PROGRAMMING SO COMPUTATIONAL MECHANICS LA English DT Article ID BOUNDARY INTEGRAL-EQUATIONS; FINITE-ELEMENT FORMULATION; UNILATERAL CONTACT; INEQUALITY PROBLEMS; COMPLEMENTARITY-PROBLEM; PRINCIPLES; BODIES; INTERFACES; IMPACT AB A new solution procedure for contact problems in elasticity with prescribed normal tractions on contact surface has been proposed in this paper. The procedure is based on the boundary element method and quadratic programming. It is next used in a two step solution algorithm for the analysis of contact problems with friction. Several numerical examples are presented and compared with results obtained using alternative solution methods. C1 CARNEGIE MELLON UNIV,DEPT CIVIL ENGN,PITTSBURGH,PA 15213. RP SIMUNOVIC, S (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 58 TC 11 Z9 11 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7675 J9 COMPUT MECH JI Comput. Mech. PD NOV PY 1994 VL 15 IS 2 BP 173 EP 187 PG 15 WC Mathematics, Interdisciplinary Applications; Mechanics SC Mathematics; Mechanics GA PU861 UT WOS:A1994PU86100006 ER PT J AU BELYTSCHKO, T CHIANG, HY PLASKACZ, E AF BELYTSCHKO, T CHIANG, HY PLASKACZ, E TI HIGH-RESOLUTION 2-DIMENSIONAL SHEAR-BAND COMPUTATIONS - IMPERFECTIONS AND MESH DEPENDENCE SO COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING LA English DT Article; Proceedings Paper CT Symposium on Parallel Finite Element Computations CY OCT 25-27, 1993 CL UNIV MINNESOTA, SUPERCOMP INST, MINNEAPOLIS, MN SP UNIV MINNESOTA, ARMY HIGH PERFORMANCE COMP RES CTR, UNIV MINNESOTA, SUPERCOMP INST HO UNIV MINNESOTA, SUPERCOMP INST ID FINITE-ELEMENT; LOCALIZATION PROBLEMS; STRAIN LOCALIZATION; SOLIDS AB Very fine meshes, up to 64000 elements with 5 to 10 elements across a shear band, are used to study dynamic shear band formation in viscoplastic plane-strain specimens under compression. Imperfections are shown to have a crucial effect on shear band structure; they determine the size and location of the shear band. A transition to a pattern of parallel shear bands is observed when the imperfection is reduced in size. It is also shown that the results are independent of element type or stabilization for early stages of localization but as the band narrows in the latter stages, element size and type have marked effects; this element and mesh dependence is attributed to insufficient resolution. C1 ARGONNE NATL LAB, DIV COMP & TELECOMMUN, ARGONNE, IL 60439 USA. RP BELYTSCHKO, T (reprint author), NORTHWESTERN UNIV, ROBERT R MCCORMICK SCH ENGN & APPL SCI, DEPT CIVIL MECH & ENGN, EVANSTON, IL 60208 USA. RI Belytschko, Ted/B-6710-2009 NR 20 TC 33 Z9 35 U1 0 U2 1 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 NOV PY 1994 VL 119 IS 1-2 BP 1 EP 15 DI 10.1016/0045-7825(94)00073-5 PG 15 WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary Applications; Mechanics SC Engineering; Mathematics; Mechanics GA PV586 UT WOS:A1994PV58600002 ER PT J AU HEWETT, DW AF HEWETT, DW TI LOW-FREQUENCY ELECTROMAGNETIC (DARWIN) APPLICATIONS IN PLASMA SIMULATION SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article ID PARTIAL-DIFFERENTIAL EQUATIONS; HYBRID SIMULATION; FIELD-EQUATIONS; MAGNETIC-FIELD; MODEL; DIMENSIONS; PINCH AB Plasma modelers have long sought to be free of the restrictive constraint on discretized time and space representations due to light waves. This constraint, commonly called the CFL condition, implies stability for explicit integration of Maxwell's hyperbolic partial differential equations as long as electromagnetic waves do not propagate more than the smallest grid spacing in a time step. The Darwin limit of Maxwell's equations eliminates these purely electromagnetic modes, making it an effective model for low-frequency phenomena because it retains fidelity for all physics resolved by the large time step that it permits. The early Darwin models suffered from numerical instabilities and non-intuitive boundary conditions. Nielson and Lewis first constructed numerically stable algorithms for the Darwin model but problems associated with vector decomposition remained. Decomposition is expensive and appears to be required in most facets of the electromagnetic calculation. Additionally, decompositions require boundary conditions that are beyond physical intuition. Over the last 15 years, both the physics model and the numerical problem have been significantly extended and restructured. These new formulations eliminate most, if not all, of the vector decomposition; the most demanding questions about boundary conditions do not arise. An overview is given of the most commonly used Darwin models, starting with a brief description of the underlying concept. Several variants of Darwin algorithms are presented; non-neutral and quasi-neutral finite-electron-mass, and quasi-neutral zero-electron-mass embodiments are included. Also discussed are new numerical methods that increase the range of parameters for which these models are practical. Finally a new Darwin variant is described that can follow the time dependence of surface and bulk currents in magnetically active materials (i.e. superconductors). Plasma need not be present-reflecting the new uses that are being found for traditional plasma algorithms. RP HEWETT, DW (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 39 TC 30 Z9 30 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD NOV PY 1994 VL 84 IS 1-3 BP 243 EP 277 DI 10.1016/0010-4655(94)90214-3 PG 35 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA PT027 UT WOS:A1994PT02700017 ER PT J AU MIRIN, AA AMBROSIANO, JJ BOLSTAD, JH BOURGEOIS, AJ BROWN, JC CHAN, B DANNEVIK, WP DUFFY, PB ELTGROTH, PG MATARAZZO, C WEHNER, MF AF MIRIN, AA AMBROSIANO, JJ BOLSTAD, JH BOURGEOIS, AJ BROWN, JC CHAN, B DANNEVIK, WP DUFFY, PB ELTGROTH, PG MATARAZZO, C WEHNER, MF TI CLIMATE SYSTEM MODELING USING A DOMAIN AND TASK DECOMPOSITION MESSAGE-PASSING APPROACH SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article ID GENERAL-CIRCULATION MODEL; SEA ICE MODEL; WORLD OCEAN; LAYER; SENSITIVITY; SIMULATIONS; RESOLUTION; EQUATIONS AB We have developed a Climate System Modeling Framework (CSMF) for high-performance computing systems, designed to schedule and couple multiple physics simulation packages in a flexible and transportable manner. Some of the major packages in the CSMF include models of atmospheric and oceanic circulation and chemistry, land surface and sea ice processes, and trace gas biogeochemistry. Parallelism is achieved through both domain decomposition and process-level concurrency, with data transfer and synchronization accomplished through message-passing. Both machine transportability and architecture-dependent optimization are handled through libraries and conditional compile directives. Preliminary experiments with the CSMF have been executed on a number of high-performance platforms, including the Intel Paragon, the TMC CM-5 and the Meiko CS-2, and we are in the very early stages of optimization. Progress to date is presented. RP MIRIN, AA (reprint author), LAWRENCE LIVERMORE NATL LAB, 7000 E AVE, LIVERMORE, CA 94550 USA. NR 33 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD NOV PY 1994 VL 84 IS 1-3 BP 278 EP 296 DI 10.1016/0010-4655(94)90215-1 PG 19 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA PT027 UT WOS:A1994PT02700018 ER PT J AU HOOVER, WG PIERCE, TG HOOVER, CG SHUGART, JO STEIN, CM EDWARDS, AL AF HOOVER, WG PIERCE, TG HOOVER, CG SHUGART, JO STEIN, CM EDWARDS, AL TI MOLECULAR-DYNAMICS, SMOOTHED-PARTICLE APPLIED MECHANICS, AND IRREVERSIBILITY SO COMPUTERS & MATHEMATICS WITH APPLICATIONS LA English DT Article ID EQUILIBRIUM AB We explore the relationship of Monaghan's version of ''smoothed-particle hydrodynamics,'' here called ''smoothed-particle applied mechanics,'' to nonequilibrium molecular dynamics. We first use smoothed particles to model the simplest possible linear transport problems, as well as a liquid-drop problem. We then consider both gas-phase and dense-fluid versions of Rayleigh-Benard convection, all in two space dimensions. We also discuss the possibility of combining the microscopic and macroscopic techniques in a hybrid scheme well-suited to the massively-parallel modelling of large-scale nonequilibrium flows. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HOOVER, WG (reprint author), UNIV CALIF DAVIS LIVERMORE,DEPT APPL SCI,LIVERMORE,CA 94551, USA. NR 23 TC 16 Z9 17 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0898-1221 J9 COMPUT MATH APPL JI Comput. Math. Appl. PD NOV-DEC PY 1994 VL 28 IS 10-12 BP 155 EP 174 DI 10.1016/0898-1221(94)00191-X PG 20 WC Mathematics, Applied SC Mathematics GA PP550 UT WOS:A1994PP55000011 ER PT J AU WITH, KA AF WITH, KA TI THE HAZARDS OF NESTING NEAR SHRUBS FOR A GRASSLAND BIRD, THE MCCOWNS LONGSPUR SO CONDOR LA English DT Article DE GROUND NESTS; HIERARCHICAL HABITAT ANALYSIS; NEST MICROHABITAT; NEST PREDATION; NEST-SITE SELECTION; SHORTGRASS PRAIRIE ID HABITAT SELECTION; SITE SELECTION; PREDATION; SUCCESS; COVER; HETEROGENEITY; CONCEALMENT; SIZE AB Half of all nests of the McCown's Longspur (Calcarius mccownii) were depredated in the shortgrass prairie of northcentral Colorado, and almost all nesting failures in this species were attributable to predators, primarily the thirteen-lined ground squirrel (Spermophilus tridecemlineatus). Nests placed beside shrubs were 2-3 times more likely to be depredated than nests associated with other types of vegetation. Half of all nests (n = 28) were associated with shrubs in a moderately grazed pasture, and 80% of these nests were eventually depredated. In contrast, most nests (57%, n = 21) were placed beside cactus in a heavily grazed pasture, which had little shrub cover. Of the 20% of nests placed beside shrubs in this pasture, however, 75% were depredated. Factor analysis of habitat variables measured at several scales around nests generated one factor that significantly explained variation in nest fate. This factor described shrub cover within 1 m of the nest and midgrass cover and degree of heterogeneity (continuity of the shortgtass matrix) at 2 m. Fine-scale (1 m) shrub cover was the most important determinant of predation risk. Nests that were depredated during incubation had six times more shrub cover within 1 m of the nest than nests depredated during the nestling period; successful nests had no measurable (greater than or equal to 5% total cover) shrub cover at this scale. The relationship between shrubs and an increased risk of nest predation is consistent with incidental predation by ground squirrels, which concentrate their activities beneath the cover afforded by shrubs. RP WITH, KA (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI With, Kimberly/J-5124-2014 OI With, Kimberly/0000-0001-5570-1515 NR 44 TC 34 Z9 34 U1 1 U2 11 PU COOPER ORNITHOLOGICAL SOC PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0010-5422 J9 CONDOR JI Condor PD NOV PY 1994 VL 96 IS 4 BP 1009 EP 1019 DI 10.2307/1369110 PG 11 WC Ornithology SC Zoology GA PV587 UT WOS:A1994PV58700014 ER PT J AU JAGUST, W AF JAGUST, W TI CEREBRAL BLOOD-FLOW AND METABOLISM IN DEMENTIA - REGIONAL PATTERNS AND THE BIOLOGY OF ALZHEIMERS-DISEASE SO DEVELOPMENTAL BRAIN DYSFUNCTION LA English DT Article; Proceedings Paper CT OASI Symposium on Down Syndrome, Alzheimer Disease and Chromosome 21 CY SEP 28-30, 1994 CL TROINA, ITALY SP OASI DE ALZHEIMERS DISEASE, METABOLISM; BLOOD FLOW; DEMENTIA; POSITRON EMISSION TOMOGRAPHY; SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY ID POSITRON EMISSION TOMOGRAPHY; COMPUTED-TOMOGRAPHY; GLUCOSE-UTILIZATION; PARKINSONS-DISEASE; TEMPORAL-LOBE; COGNITIVE IMPAIRMENT; CLINICAL-EVALUATION; INFARCT DEMENTIA; SENILE DEMENTIA; SYNAPSE LOSS AB Functional imaging techniques, specifically positron emission tomography and single-photon emission computed tomography, have been used to study dementing illnesses with two general aims: the clinical use of the techniques to diagnose the cause of dementia during life and the use of the techniques to explain the pathophysiology of dementia. In both applications, patterns of perfusion and metabolism provide information of diagnostic and biological use. With regard to diagnosis, the pattern of temporal and parietal hypometabolism and hypoperfusion may be of some utility in determining whether the most common cause of dementia, Alzheimer's disease, is present during life. However, this pattern is not specific, and the sensitivity of the pattern is also still controversial. Limitations in the diagnostic use of the techniques are related to uncertainty about sensitivity and specificity and the lack of a prospective controlled study with pathological validation. With regard to pathophysiology, patterns of abnormal perfusion and metabolism have helped to explain the heterogeneity of the disease by demonstrating relationships between regional functional pathology and behavior. While some lines of evidence suggest that the functional abnormalities may reflect neuropathology, other evidence suggests that the interpretation of metabolic and flow deficits is more complex. Nevertheless, the regional changes in brain function appear to provide important information about where the disease begins in the brain and about how it may progress. C1 UNIV CALIF DAVIS,CTR ALZHEIMERS,DEPT NEUROL,DAVIS,CA 95616. RP JAGUST, W (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,55-121,BERKELEY,CA 94720, USA. NR 62 TC 2 Z9 2 U1 2 U2 2 PU KARGER PI BASEL PA ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND SN 1019-5815 J9 DEV BRAIN DYSFUNCT JI Dev. Brain Dysfunction PD NOV-DEC PY 1994 VL 7 IS 6 BP 302 EP 310 PG 9 WC Developmental Biology; Neurosciences SC Developmental Biology; Neurosciences & Neurology GA RG662 UT WOS:A1994RG66200004 ER PT J AU VERING, T SCHUHMANN, W SCHMIDT, HL MIKOLAJICK, T FALTER, T RYSSEL, H JANATA, J AF VERING, T SCHUHMANN, W SCHMIDT, HL MIKOLAJICK, T FALTER, T RYSSEL, H JANATA, J TI FIELD-EFFECT TRANSISTORS AS TRANSDUCERS IN BIOSENSORS FOR SUBSTRATES OF DEHYDROGENASES SO ELECTROANALYSIS LA English DT Article DE FIELD-EFFECT TRANSISTOR; ISFET; UREASE; NAD(+); DEHYDROGENASE; BUFFER CAPACITY; REDOX-FET ID SENSORS; ELECTRODES AB A specially designed field-effect transistor (FET) with a significantly enlarged gate area was applied in a classical urea enzyme FET (ENFET). The resulting high stability and sensitivity toward pH shifts make it predestinated for the measurement of H+ produced in the equilibrium of NAD(+)-dependent enzymatic reactions, especially when the equilibrium is shifted by a subsequent reaction. As a mode, the glucose dehydrogenase (GDH) reaction connected to a ion-sensitive field-effect transistor (ISFET) is demonstrated by which glucose could be determined in the range from 1 to 40 mM. A platinum electrode on the gate of the FET permits the measurement of reduction equivalents (NADH) by means of the recently reported chronopotentiometrical methods. Thus, in principle a way toward a redox-ENFET is shown. C1 UNIV ERLANGEN NURNBERG, LEHRSTUHL ELEKTR BAUELEMENTE, D-91058 ERLANGEN, GERMANY. FRAUNHOFER ARBEITSGRP INTEGRIERTE SCHALTUNGEN, D-91058 ERLANGEN, GERMANY. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RP VERING, T (reprint author), TECH UNIV MUNICH, LEHRSTUHL ALLGEMEINE CHEM & BIOCHEM, D-85350 FREISING, GERMANY. RI Mikolajick, Thomas/F-8427-2011; OI Mikolajick, Thomas/0000-0003-3814-0378; Schuhmann, Wolfgang/0000-0003-2916-5223 NR 19 TC 8 Z9 8 U1 1 U2 3 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 1040-0397 J9 ELECTROANAL JI Electroanalysis PD NOV-DEC PY 1994 VL 6 IS 11-12 BP 953 EP 956 DI 10.1002/elan.1140061106 PG 4 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA PZ323 UT WOS:A1994PZ32300005 ER PT J AU ALLEN, PG CONRADSON, SD WILSON, MS GOTTESFELD, S RAISTRICK, ID VALERIO, J LOVATO, M AF ALLEN, PG CONRADSON, SD WILSON, MS GOTTESFELD, S RAISTRICK, ID VALERIO, J LOVATO, M TI IN-SITU STRUCTURAL CHARACTERIZATION OF A PLATINUM ELECTROCATALYST BY DISPERSIVE-X-RAY ABSORPTION-SPECTROSCOPY SO ELECTROCHIMICA ACTA LA English DT Article DE PEM FUEL CELL; PLATINUM; ELECTROCATALYSTS; DISPERSIVE EXAFS; IN SITU EXAFS ID SURFACE; INSITU; STATES AB Using in-situ dispersive EXAFS spectroscopy, we have monitored the numbers of Pt-O and Pt-Pt bonds and the charge on the Pt in parallel with cyclic voltammetry on Pt clusters in a polymer electrolyte fuel cell. Due to the increased sensitivity of this method, we detect small structural changes not previously reported for these clusters and can correlate these changes with specific reactions, ie H desorption or O adsorption in the double-layer region. RP ALLEN, PG (reprint author), LOS ALAMOS NATL LAB,MTL 11,MS D429,POB 1663,LOS ALAMOS,NM 87545, USA. NR 26 TC 34 Z9 34 U1 0 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD NOV PY 1994 VL 39 IS 16 BP 2415 EP 2418 DI 10.1016/0013-4686(94)E0196-U PG 4 WC Electrochemistry SC Electrochemistry GA PY468 UT WOS:A1994PY46800012 ER PT J AU VINE, EL MISURIELLO, H HOPKINS, ME AF VINE, EL MISURIELLO, H HOPKINS, ME TI A RESEARCH AGENDA FOR DEMAND-SIDE MANAGEMENT IMPACT MEASUREMENT SO ENERGY LA English DT Article AB This paper focuses on future areas of research and development (R&D) in the area of demand-side management (DSM) impact measurement and evaluation. The goal is to identify viable R&D opportunities that can improve capabilities to determine the energy and demand reductions achieved in customer facilities through DSM programs and measures. After reviewing key issues in data analysis, field monitoring, and the evaluation of DSM measures, potential R& D opportunities are identified according to a priority level. C1 FLEMING GRP, SAN RAMON, CA 94583 USA. PACIFIC NW LAB, WASHINGTON, DC 20024 USA. RP VINE, EL (reprint author), LAWRENCE BERKELEY LAB, BLDG 904000, BERKELEY, CA 94720 USA. NR 12 TC 5 Z9 5 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD NOV PY 1994 VL 19 IS 11 BP 1103 EP 1111 DI 10.1016/0360-5442(94)90067-1 PG 9 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA PK829 UT WOS:A1994PK82900001 ER PT J AU PESARAN, AA HEIDEN, R AF PESARAN, AA HEIDEN, R TI THE INFLUENCE OF ALTITUDE ON THE PERFORMANCE OF DESICCANT-COOLING SYSTEMS SO ENERGY LA English DT Article AB The impact of height above sea level (i.e. ambient pressure) on the performance of the ventilation cycle desiccant-cooling system and its components has been studied using computer simulations. The impact of ambient pressure depends on whether the system was designed for fixed-mass flow rate or fixed-volume flow rate operation. As the ambient pressure is decreased from 1.0 to 0.8 atm, the system thermal coefficient of performance increases by 8% for both fixed-mass and fixed-volume flow rate; the cooling capacity of the system is decreased by 14% for the fixed-volume flow rate system and increased by 7% for the fixed-mass flow rate system. The electric power requirements for the system with fixed-volume flow rate did not change; for the fixed-mass flow rate system, it increased by 44%. The overall coefficient of performance increased up to 5% for the fixed-volume flow rate system and decreased up to 4% for the fixed-mass flow rate system. C1 UNIV DENVER,DENVER,CO 80208. RP PESARAN, AA (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 15 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD NOV PY 1994 VL 19 IS 11 BP 1165 EP 1179 DI 10.1016/0360-5442(94)90073-6 PG 15 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA PK829 UT WOS:A1994PK82900007 ER PT J AU MARTINO, A WILCOXON, JP KAWOLA, JS AF MARTINO, A WILCOXON, JP KAWOLA, JS TI SYNTHESIS AND CHARACTERIZATION OF COAL-LIQUEFACTION CATALYSTS IN INVERSE MICELLES SO ENERGY & FUELS LA English DT Article ID COLLOIDAL METAL PARTICLES; CADMIUM-SULFIDE INSITU; IN-OIL MICROEMULSIONS; REVERSE MICELLES; SEMICONDUCTOR CLUSTERS; NONAQUEOUS SOLUTIONS; PLATINUM PARTICLES; BEHAVIOR; GROWTH; WATER AB We have synthesized nanometer sized particles of Fe, Pd, and FeS2 (pyrite) in inverse micelle solutions and tested the particles as catalysts in coal conversion processes. The synthesis procedure produces a variety of high surface area, highly dispersed, unsupported metal and metal compound catalysts. While Pd is used to test the viability of the particles formed by this synthesis technique, only disposable iron-based particles are of economic interest. The particles are prepared by reduction or chemical reaction of salts solubilized in microheterogeneous surfactant and oil solutions. Chemical manipulation produces metal powders. Particle size and composition are determined by transmission electron microscopy, electron diffraction, and UV-visible spectrophotometry. Catalysts in solution and as powders are explored in three reactions: the hydrogenolysis of naphthylbibenzylmethane, coal hydropyrolysis, and coal liquefaction. The model hydrogenolysis reaction provides information on the role of surfactant on catalytic activity. Results indicate good catalytic activity for coal hydropyrolysis and liquefaction. RP MARTINO, A (reprint author), SANDIA NATL LABS,DEPT FUEL SCI,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 37 TC 21 Z9 21 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD NOV-DEC PY 1994 VL 8 IS 6 BP 1289 EP 1295 DI 10.1021/ef00048a017 PG 7 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA PR940 UT WOS:A1994PR94000018 ER PT J AU CODY, GD THIYAGARAJAN, P BOTTO, RE HUNT, JE WINANS, RE AF CODY, GD THIYAGARAJAN, P BOTTO, RE HUNT, JE WINANS, RE TI SOLUTION STRUCTURE OF COAL MACROMOLECULES IN PYRIDINE - SMALL-ANGLE NEUTRON-SCATTERING ANALYSIS OF UNTREATED AND O-METHYLATED COAL EXTRACTS SO ENERGY & FUELS LA English DT Article ID X-RAY-SCATTERING; SIZE EXCLUSION CHROMATOGRAPHY; MOLECULAR-WEIGHT DISTRIBUTION; BITUMINOUS COAL; MACROSTRUCTURE; COALIFICATION; AGGREGATION; PROTEINS; LIQUIDS AB Small-angle neutron scattering (SANS) has been applied to investigate the solution state characteristics of pyridine extracts obtained from three Argonne Premium coals: APCS No. 3, 2, and 8. In order to investigate the role of specific solvent-solute interactions, both untreated and O-methylated extracts were investigated. SANS analysis reveals that the solution structure of lower rank coal extracts exist as small particles, with radii similar to 80 Angstrom, which loosely aggregate into topologically complex solution structures. Details on the structure of the aggregates are obtained from the scattering behavior at low and by assuming a pair correlation function which follows a power law decay from the center to the perimeter of the aggregate. The dimensionality of the aggregates indicates mass fractal topology. Changes in the solution state due to O-methylation are manifested in densification of the extended solution structure. The size and shape of the elemental particles appear unaffected by the derivatization chemistry. RP CODY, GD (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 48 TC 11 Z9 12 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD NOV-DEC PY 1994 VL 8 IS 6 BP 1370 EP 1378 DI 10.1021/ef00048a028 PG 9 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA PR940 UT WOS:A1994PR94000029 ER PT J AU MONGIA, N SATHAYE, J MONGIA, P AF MONGIA, N SATHAYE, J MONGIA, P TI ENERGY USE AND CARBON IMPLICATIONS IN INDIA - FOCUS ON INDUSTRY SO ENERGY POLICY LA English DT Article DE INDIA; INDUSTRIAL ENERGY USE; CO2 EMISSIONS AB Our objective in this paper is to assess the economic impact of alternative abatement strategies which may be adopted by India in the perspective of its industrialization program. For this purpose, we quantify levels of CO2 emissions associated with different industrial strategies and process choices for given levels of projected demand for end-use service and for industrial products. We then estimate optimal process and fuel mix of energy supply for each end use which is consistent with given emission abatement levels, and identify policy options in view of the above. C1 LAWRENCE BERKELEY LAB,INT ENERGY STUDIES GRP,BERKELEY,CA 94720. UNIV DELHI,DELHI SCH ECON,DELHI 110007,INDIA. RP MONGIA, N (reprint author), UNIV DELHI,DEPT ECON,MIRANDA HOUSE,DELHI 110007,INDIA. NR 54 TC 7 Z9 7 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD NOV PY 1994 VL 22 IS 11 BP 894 EP 906 DI 10.1016/0301-4215(94)90037-X PG 13 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA PZ451 UT WOS:A1994PZ45100002 ER PT J AU WU, ZX HE, JK ZHANG, A XU, Q ZHANG, SY SATHAYE, JY AF WU, ZX HE, JK ZHANG, A XU, Q ZHANG, SY SATHAYE, JY TI A MACRO-ASSESSMENT OF TECHNOLOGY OPTIONS FOR CO2 MITIGATION IN CHINA ENERGY SYSTEM SO ENERGY POLICY LA English DT Article DE CO2 MITIGATION; CHINA; ETO MODEL AB China's CO2 emissions from commercial fossil fuel reached 638 Mt C in 1990, accounting for 11% of the world total emissions of that year. The emission is expected to increase together with its high GDP growth rate in the future. This paper analyses the characteristics of China's CO2 emissions and proposes several options for mitigating the CO2 emissions on a large scale, such as strengthening energy conservation, introducing energy-efficient technologies into the energy system, speeding up non-fossil fuels development, importing oil and natural gas to substitute for coal and so on. Through the application of the ETO model, the paper evaluates the cost of mitigating CO2 emissions and its effects on national economic development. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP WU, ZX (reprint author), TSING HUA UNIV,INST NUCL ENERGY TECHNOL,TSINGHUA,PEOPLES R CHINA. NR 22 TC 14 Z9 15 U1 1 U2 2 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD NOV PY 1994 VL 22 IS 11 BP 907 EP 913 DI 10.1016/0301-4215(94)90038-8 PG 7 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA PZ451 UT WOS:A1994PZ45100003 ER PT J AU HIRST, E AF HIRST, E TI BRIGHT FUTURE - ENERGY EFFICIENCY PROGRAMS AT ELECTRIC UTILITIES SO ENVIRONMENT LA English DT Article RP HIRST, E (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN, USA. NR 26 TC 1 Z9 1 U1 0 U2 0 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 SN 0013-9157 J9 ENVIRONMENT JI Environment PD NOV PY 1994 VL 36 IS 9 BP 10 EP & PG 0 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA PR686 UT WOS:A1994PR68600004 ER PT J AU WILBANKS, TJ AF WILBANKS, TJ TI IMPROVING ENERGY EFFICIENCY - MAKING A NO-REGRETS OPTION WORK SO ENVIRONMENT LA English DT Article RP WILBANKS, TJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN, USA. NR 33 TC 4 Z9 4 U1 0 U2 0 PU HELDREF PUBLICATIONS PI WASHINGTON PA 1319 EIGHTEENTH ST NW, WASHINGTON, DC 20036-1802 SN 0013-9157 J9 ENVIRONMENT JI Environment PD NOV PY 1994 VL 36 IS 9 BP 16 EP & PG 0 WC Environmental Sciences; Environmental Studies SC Environmental Sciences & Ecology GA PR686 UT WOS:A1994PR68600005 ER PT J AU OLSEN, KB WANG, J SETIADJI, R LU, JM AF OLSEN, KB WANG, J SETIADJI, R LU, JM TI FIELD SCREENING OF CHROMIUM, CADMIUM, ZINC, COPPER, AND LEAD IN SEDIMENTS BY STRIPPING ANALYSIS SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID VOLTAMMETRY AB Stripping analysis (SA) was successfully employed for field verification of metals contaminants in soils and sediments at hazardous waste sites. Microwave digestion procedures were tailored to meet the needs of field activities and electrochemical measurements. An adsorptive stripping voltammetric (AdSV) scheme was used for monitoring total chromium and for chromium speciation, while conventional anodic stripping voltammetry (ASV) and potentiometric stripping analysis (PSA) were used for measuring cadmium, zinc, copper, and lead. The results demonstrate that SA is capable of on-site identification of contaminated layers in soils and sediments. Concentration values measured by SA correlated well with those obtained by U.S. Environmental Protection Agency (EPA)-approved atomic or mass spectroscopy methods. The remarkable sensitivity, portability, low-power need, and low cost of SA make it an attractive choice for on-site analysis of selected metals during site characterization and remediation activities. C1 NEW MEXICO STATE UNIV, DEPT CHEM, LAS CRUCES, NM 88003 USA. RP OLSEN, KB (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. RI Wang, Joseph/C-6175-2011 NR 12 TC 38 Z9 39 U1 1 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD NOV PY 1994 VL 28 IS 12 BP 2074 EP 2079 DI 10.1021/es00061a015 PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA PP829 UT WOS:A1994PP82900017 PM 22191746 ER PT J AU ARBON, RE MINCHER, BJ KNIGHTON, WB AF ARBON, RE MINCHER, BJ KNIGHTON, WB TI GAMMA-RAY DESTRUCTION OF INDIVIDUAL PCB CONGENERS IN NEUTRAL 2-PROPANOL SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID POLYCHLORINATED-BIPHENYLS; DECHLORINATION; DEGRADATION; RADIATION AB The radiolytic degradation of 25 PCB congeners from nine homologs was investigated in neutral aerated 2-propanol using spent nuclear fuel as the gamma-ray source. Radiolytic degradation is conveniently described in terms of a pseudo-first-order rate constant expressed in terms of dose, rather than time, and referred to as a dose constant. Dose constants obtained were found to be dependent on both the number and the positions of the chlorines. A general increase in the dose constant was observed with increasing chlorine number. Chlorine substitution in the para and meta position increases the dose constant while substitution in the ortho position decreases it. Dose constant trends follow the energy level of the lowest unoccupied molecular orbital. Previously unreported degradation products consisting of 2-propanol-substituted polychlorinated biphenyls are characterized. Mass balance information is incomplete for some congeners. Based upon experiments using a C-14-labeled tetrachlorobiphenyl, degradation products are in nonvolatile or semivolatile constituents. C1 MONTANA STATE UNIV,BOZEMAN,MT 59717. RP ARBON, RE (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. RI Mincher, Bruce/C-7758-2017 NR 27 TC 31 Z9 33 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD NOV PY 1994 VL 28 IS 12 BP 2191 EP 2196 DI 10.1021/es00061a030 PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA PP829 UT WOS:A1994PP82900032 PM 22191761 ER PT J AU POPPITI, J AF POPPITI, J TI THE ROLE OF FIELD TESTING IN ENVIRONMENTAL MEASUREMENTS SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article RP POPPITI, J (reprint author), US DOE,TANK WASTE REMEDIAT PROGRAM,HANFORD,WA, USA. NR 0 TC 5 Z9 5 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD NOV PY 1994 VL 28 IS 12 BP A536 EP A539 DI 10.1021/es00061a005 PG 4 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA PP829 UT WOS:A1994PP82900007 ER PT J AU KROPP, J KNAPP, FF WEYENBERG, A MCPHERSON, DW AMBROSE, KR CALLAHAN, AP VONBERGMANN, K BIERSACK, HJ AF KROPP, J KNAPP, FF WEYENBERG, A MCPHERSON, DW AMBROSE, KR CALLAHAN, AP VONBERGMANN, K BIERSACK, HJ TI EVALUATION OF PANCREATIC LIPASE ACTIVITY BY SIMPLE URINE ANALYSIS AFTER ORAL-ADMINISTRATION OF A NEW IODINE-131-LABELED TRIGLYCERIDE SO EUROPEAN JOURNAL OF NUCLEAR MEDICINE LA English DT Note DE PANCREATIC LIPASE; RADIOLABELED TRIGLYCERIDE; IPPA METABOLISM; ORAL TEST; URINE ANALYSIS ID ACID AB A new iodine-131-labeled triglyceride analogue called ''MIPAG'' [1,2-dipalmitoyl-3-[(15-p-iodophenyl) pentadecan-1-oyl]rac-glycerol] has been prepared in which 15-(p-iodophenyl)pentadecanoic acid (IPPA) is attached to position-3. MIPAG has been developed for the evaluation of pancreatic exocrine function by simple urine analysis and has been evaluated in rats and humans. After oral administration, IPPA is released from the triglyceride by the action of pancreatic lipases followed by intestinal absorption and the principal IPPA metabolite (p-iodobenzoic acid, IBA) is primarily excreted in the urine. Excretion in the urine and feces was evaluated in rats, as well as the biodistribution in various organs over 21 days. Twenty patients without pancreatic disease (normals) and four patients with pancreatic insufficiency were also investigated. Following oral administration of 30 mu Ci of MIPAG, urine was collected for two successive 24-h periods. Blood samples were drawn and thin-layer chromatographic (TLC) analysis was performed on the serum lipid extracts. Urine from normals contained 44.9%+/-7.7% and 61.8%+/-8.4% of the administered activity after 24 and 48 h, respectively. The patients with pancreatic insufficiency excreted 13.1%+/-5.6% and 18.9%+/-6.2%, respectively, which was significantly decreased (P<0.001) compared with normals. The TLC profiles showed an increasing proportion of IBA with time. Urine analysis after oral administration of MIPAG thus appears to be an attractive new technique for the evaluation of pancreatic lipase activity by a simple urine analysis. C1 OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN. UNIV BONN,DEPT INTERNAL MED,BONN,GERMANY. UNIV BONN,DEPT NUCL MED,W-5300 BONN,GERMANY. RP KROPP, J (reprint author), TECH UNIV DRESDEN,DEPT NUCL MED,NUKL MED KLIN,FETSCHER STR 74,D-01307 DRESDEN,GERMANY. NR 15 TC 2 Z9 2 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-6997 J9 EUR J NUCL MED JI Eur. J. Nucl. Med. PD NOV PY 1994 VL 21 IS 11 BP 1227 EP 1230 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA PP862 UT WOS:A1994PP86200010 PM 7859776 ER PT J AU ZHANG, BL WANG, CZ HO, KM CHAN, CT AF ZHANG, BL WANG, CZ HO, KM CHAN, CT TI STRUCTURE OF COLLAPSED SOLID C-60 SO EUROPHYSICS LETTERS LA English DT Article ID AMORPHOUS-CARBON; C60; PRESSURE; DIAMOND; PHASE; DYNAMICS AB The behavior of solid C-60 under high pressure is simulated by tight-binding molecular dynamics. The simulation results show that the C-60 solid transforms to a diamond-like amorphous carbon phase when the C-60 cage structure collapses under high pressure. The optical absorption spectra obtained from our calculation are compared with experimental measurements. The structural and electronic properties of collapsed fullerene samples are presented and the relations between the electronic structure and local atomic configurations are discussed. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES LAB,AMES,IA 50011. NR 17 TC 18 Z9 18 U1 0 U2 3 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 NOV 1 PY 1994 VL 28 IS 4 BP 219 EP 224 DI 10.1209/0295-5075/28/4/001 PG 6 WC Physics, Multidisciplinary SC Physics GA PQ542 UT WOS:A1994PQ54200001 ER PT J AU RODER, H FEHSKE, H SILVER, RN AF RODER, H FEHSKE, H SILVER, RN TI THE ORDERING OF POLARONS IN THE HOLSTEIN-T-J MODEL - AN APPLICATION TO LA2-XSRXNIO4+Y SO EUROPHYSICS LETTERS LA English DT Article AB The recently observed ordering of polarons in La2-xSrxNiO4+y is investigated in terms of a simple one-band model of strongly correlated electrons at quarter filling. The lattice distorsions are described by an in-plane breathing mode which is treated in the adiabatic limit. We use exact diagonalization techniques on small lattices to obtain the ground-state configuration and the excitation spectrum of the Holstein-t-J model. For large enough electron-phonon coupling a state resembling the observed ordering of polarons appears as the ground state of the Holstein-t-J model. We discuss the dependence of the charge and magnetic structure factors on doping away from quarter filling. Within the limits of a finite-lattice calculation our results agree qualitatively with the experiment. C1 LOS ALAMOS NATL LAB,MSB262,LOS ALAMOS,NM 87545. RP RODER, H (reprint author), UNIV BAYREUTH,INST PHYS,D-95440 BAYREUTH,GERMANY. NR 11 TC 18 Z9 18 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 NOV 1 PY 1994 VL 28 IS 4 BP 257 EP 262 DI 10.1209/0295-5075/28/4/007 PG 6 WC Physics, Multidisciplinary SC Physics GA PQ542 UT WOS:A1994PQ54200007 ER PT J AU PACZUSKI, M MASLOV, S BAK, P AF PACZUSKI, M MASLOV, S BAK, P TI FIELD-THEORY FOR A MODEL OF SELF-ORGANIZED CRITICALITY (VOL 27, PG 97, 1994) SO EUROPHYSICS LETTERS LA English DT Correction, Addition ID PERCOLATION C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11790. RP PACZUSKI, M (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 4 TC 27 Z9 27 U1 0 U2 5 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 NOV 1 PY 1994 VL 28 IS 4 BP 295 EP 296 DI 10.1209/0295-5075/28/4/013 PG 2 WC Physics, Multidisciplinary SC Physics GA PQ542 UT WOS:A1994PQ54200013 ER PT J AU APEL, WA WALTON, MR DUGAN, PR AF APEL, WA WALTON, MR DUGAN, PR TI AN EVALUATION OF AUTOTROPHIC MICROBES FOR THE REMOVAL OF CARBON-DIOXIDE FROM COMBUSTION GAS STREAMS SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE CARBON DIOXIDE BIOREMOVAL; GREENHOUSE EFFECT; GREENHOUSE GASES; CARBON DIOXIDE FIXATION PATHWAYS ID CO2 FIXATION; GREENHOUSE AB Carbon dioxide is a greenhouse gas that is believed to be a major contributor to global warming. Studies have shown that significant amounts of CO2 are released into the atmosphere as a result of fossil fuels combustion. Therefore, considerable interest exists in effective and economical technologies for the removal of CO2 from fossil fuel combustion gas streams. This work evaluated the use of autotrophic microbes for the removal of CO2 from coal fired power plant combustion gas streams. The CO2 removal rates of the following autotrophic microbes were determined: Chlorella pyrenoidosa, Euglena gracilis, Thiobacillus ferrooxidans, Aphanocapsa delicatissima, Isochrysis galbana, Phaodactylum tricornutum, Navicula tripunctata schizonemoids, Gomphonema parvulum, Surirella ovata ovata, and four algal consortia. Of those tested, Chlorella pyrenzoidosa exhibited the highest removal rate with 2.6 g CO, per day per g dry weight of biomass being removed under optimized conditions. Extrapolation of these data indicated that to remove CO2 from the combustion gases of a coal fired power plant burning 2.4 x 10(4) metric tons of coal per day would require a bioreactor 386 km(2) x 1 m deep and would result in the production of 2.13 x 10(5) metric tons (wet weight) of biomass per day. Based on these calculations, it was concluded that autotrophic CO2 removal would not be feasible at most locations, and as a result, alternate technologies for CO2 removal should be explored. RP APEL, WA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,CTR BIOL PROC TECHNOL,POB 1625,IDAHO FALLS,ID 83415, USA. OI Walton, Michelle/0000-0003-4169-4443 NR 14 TC 4 Z9 4 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 139 EP 149 DI 10.1016/0378-3820(94)90138-4 PG 11 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700006 ER PT J AU PREMUZIC, ET LIN, MS MANOWITZ, B AF PREMUZIC, ET LIN, MS MANOWITZ, B TI THE SIGNIFICANCE OF CHEMICAL MARKERS IN THE BIOPROCESSING OF FOSSIL-FUELS SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE CHEMICAL MARKERS; OIL BIOCONVERSION AB Biochemical conversion of crude oils is a multi-step process proceeding through a series of biochemical reactions. These reactions can be characterized by a set of chemical markers which are associated with the chemical composition of crude oils. Reactions with heavy crude oils indicate that there is an overall decrease in the concentration and chemical speciation of organic sulfur compounds, and a redistribution of hydrocarbons and organometallic species. The contents of trace metals in the crude oils, such as nickel and vanadium, also decrease. Further, heavy ends of crudes, containing the asphaltenes and the polar nitrogen, sulfur, and oxygen containing fractions, as well as the organometallic compounds and complexes, are biochemically converted to lower molecular weight chemical species. In the studies reported in this paper, microorganisms used to mediate such reactions were thermophilic ( > 60 degrees C) and pressure tolerant (up to 2500 psi). These organisms are also capable of biochemical conversion of bituminous and lignite coals in an analogous manner to their action on crude oils and follow similar trends characterized by chemical markers. For example, X-ray absorption near-edge structural (XANES) analyses of biotreated crude oils and low grade coals show that biochemical reactions lead to decreases in organic sulfides and thiophenes with a concurrent increase in sulfoxide contents. Chemically related constituents present in heavy crude oil fractions and low grade coals are the asphaltenes. Asphaltenes are complex structures containing heteroatoms and metals involved in inter- and intra-molecular bridges and stereochemical configurations. The chemical markers associated with the biochemical conversion of oils and coals indicate multiple biochemical processes involving chemical reactions at sites containing heteroatoms and metals leading to a breakdown of the structure(s) to smaller molecular weight units. Thus, using chemical markers as diagnostic tools, the extent and the efficiency of fossil fuel bioconversion may be predicted and monitored, allowing for better cost-efficient field trials. Recent results in this area will be presented and discussed in this paper. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV APPL PHYS SCI,UPTON,NY 11973. RP PREMUZIC, ET (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV BIOSYST & PROC SCI,UPTON,NY 11973, USA. NR 11 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 227 EP 239 DI 10.1016/0378-3820(94)90145-7 PG 13 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700013 ER PT J AU SCOTT, TC KAUFMAN, EN COSGROVE, JM ASIF, M PETERSEN, JN AF SCOTT, TC KAUFMAN, EN COSGROVE, JM ASIF, M PETERSEN, JN TI HYDRODYNAMIC BEHAVIOR OF A LIQUID-SOLID FLUIDIZED-BED REACTOR FOR THE BIOCONVERSION OF COAL PARTICLES TO LIQUID PRODUCTS SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE BIOCATALYSTS; COAL BIOLIQUEFACTION; FLUIDIZED BED REACTOR; MATHEMATICAL MODELING AB A predictive mathematical model based on particle convection and dispersion is presented for a liquid fluidized bed of coal particles. The numerical representation can follow transient behavior of liquid fluidized beds that contain a defined particle-size distribution. The calculations exhibited excellent agreement when compared to experimental transient pressure-drop data from a column containing particles of Illinois No. 6 bituminous coal in the size range of 20-120 mu m. In addition, the model was used to simulate the effect of periodic (hourly) liquid velocity step changes on elutriation of small particles from a given particle-size distribution of 34.5-75.5 mu m. For the situation tested, the calculations indicate that (a) the column does not reach a steady state between velocity changes and (b) that higher initial particle elutriation rates decay to lower values until no more particles elutriate from the column. C1 WASHINGTON STATE UNIV,DEPT CHEM ENGN,PULLMAN,WA 99164. RP SCOTT, TC (reprint author), OAK RIDGE NATL LAB,CTR BIOPROC RES & DEV,POB 2008,OAK RIDGE,TN 37831, USA. RI Petersen, James/B-8924-2008; OI Asif, Mohammad/0000-0003-3196-0074 NR 9 TC 5 Z9 5 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 241 EP 249 DI 10.1016/0378-3820(94)90146-5 PG 9 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700014 ER PT J AU ANDREWS, GF NOAH, KS GLENN, AW STEVENS, CJ AF ANDREWS, GF NOAH, KS GLENN, AW STEVENS, CJ TI COMBINED PHYSICAL/MICROBIAL BENEFICIATION OF COAL USING THE FLOOD/DRAIN BIOREACTOR SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE COAL BIODESULFURIZATION; BIOREACTORS AB The flood/drain reactor consists of a bed of intermediate-sized coal (roughly 0.5 to 5 mm) periodically fluidized by pumping in a mixed bacterial culture. Metabolic products and coal fines are washed out of the bed, and large pyritic inclusions and other dense mineral matter tends to settle to the base of the bed. Draining the bed then draws in fresh air for subsequent pyrite removal by microorganisms. Experiments on a laboratory-scale bed, 10.2 cm diameter with two 12 x 30 mesh Illinois #6 coals and a 1/4 in. x 28 mesh Pittsburgh #8 coal showed that up to 80% pyrite removal could be achieved in four weeks by this combination of physical separation and microbial activity. Operational problems included removal of fines from the bed during start-up and the appearance of acidophilic protozoa grazing on the pyrite-oxidizing bacteria. Significant improvement in performance is anticipated by eliminating the lag-phase of the sulfur-oxidizing bacteria and optimizing the timing of the flood/drain cycles. RP ANDREWS, GF (reprint author), IDAHO NATL ENGN LAB,CTR BIOL PROC TECHNOL,POB 1625,IDAHO FALLS,ID 83415, USA. RI Unciano, Noel/B-6810-2009 NR 11 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 283 EP 296 DI 10.1016/0378-3820(94)90151-1 PG 14 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700019 ER PT J AU SCOTT, CD WOODWARD, CA SCOTT, TC AF SCOTT, CD WOODWARD, CA SCOTT, TC TI MECHANISMS AND EFFECTS OF USING CHEMICALLY-MODIFIED REDUCING ENZYMES TO ENHANCE THE CONVERSION OF COAL TO LIQUIDS SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE COAL BIOLIQUEFACTION; REDUCING ENZYMES ID ORGANIC-SOLVENTS; SOLUBILIZATION; HYDROGENASE AB Reducing enzymes can be chemically modified by activated polyethylene glycol or various substituted aromatic organic reagents so that they can be effectively dissolved and used in organic liquids while maintaining catalytic activity. Such biocatalysts are being investigated for use in organic solvents to enhance the conversion of coal to liquids in a hydrogen atmosphere at mild operating conditions. Most of the recent work has been with a hydrogenase isolated from Proteus vulgaris, cytochrome c, and a hydrogenase from the hyperthermophile Pyrococcus furiosus. Chemical modification has been primarily by methoxypolyethylene glycol p-nitrophenyl carbonate and dinitrofluorobenzene. Solvents used have included pyridine; benzene; toluene; and a mixture of tetralin, 2-methylnaphthalene, and p-cresol that simulates a process-derived solvent. Molecular hydrogen and other reducing agents are being evaluated with reaction temperatures in the range of 30-80 degrees C. It has been shown that the modified enzymes do enhance the conversion of coal to liquids with over 40% of bituminous coal having been converted in a small fluidized-bed bioreactor during a 24 h period. Work with model compounds such as 1-C4-(2-phenylethyl)benzyl]naphthalene suggests that part of the conversion process may be due to splitting at methyl or ethyl bridging, and there is some indication that there may be additional saturation of the ring structures. RP SCOTT, CD (reprint author), OAK RIDGE NATL LAB,CTR BIOPROC RES & DEV,POB 2008,OAK RIDGE,TN 37831, USA. NR 15 TC 6 Z9 7 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 319 EP 329 DI 10.1016/0378-3820(94)90154-6 PG 11 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700022 ER PT J AU VOLKWEIN, JC SCHOENEMAN, AL CLAUSEN, EG GADDY, JL JOHNSON, ER BASU, R JU, N KLASSON, KT AF VOLKWEIN, JC SCHOENEMAN, AL CLAUSEN, EG GADDY, JL JOHNSON, ER BASU, R JU, N KLASSON, KT TI BIOLOGICAL PRODUCTION OF METHANE FROM BITUMINOUS COAL SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT 4th International Symposium on the Biological Processing of Fossil Fuels CY SEP 21-23, 1993 CL ALGHERO, ITALY SP UNIV CAGLIARI, SARDINIAN ASSOC MINING ENG DE COAL BIOGASIFICATION; BITUMINOUS COAL; METHANE ID BACTERIA; GROWTH AB Biogasification of coal offers significant economic and environmental benefits for the continued utilization of coal resources. Several consortia from various natural sources associated with coal have been shown to produce methane from media containing only coal as the organic carbon source. Methane production of these samples has continued to increase with time. The cultures have remained viable and have continued to produce methane after 5 successive transfers to media containing coal as the sole carbon source. Methane quantities of 4 and 5 volume percent methane (0.03 and 0.04 mmol per tube) have been observed from Pittsburgh and Wyodak coals. Serum tube experiments were scaled to larger column experiments that also indicated that methane is produced from medium containing coal as the only carbon source. C1 UNIV ARKANSAS,DEPT CHEM ENGN,FAYETTEVILLE,AR 72701. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP VOLKWEIN, JC (reprint author), US BUR MINES,POB 18070,PITTSBURGH,PA 15236, USA. OI Klasson, K. Thomas/0000-0003-3358-3081 NR 10 TC 16 Z9 17 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD NOV PY 1994 VL 40 IS 2-3 BP 339 EP 345 DI 10.1016/0378-3820(94)90156-2 PG 7 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA PW577 UT WOS:A1994PW57700024 ER PT J AU LOUSTEAU, DC AF LOUSTEAU, DC TI THE ITER IN-VESSEL SYSTEM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The International Thermonuclear Experimental Reactor (ITER) is a collaboration of the European Communities, Japan, the Russian Federation, and the United States of America, carried out under the auspices of the International Atomic Energy Agency (IAEA), in the field of controlled thermonuclear fusion. As such, ITER represents a unique example of international collaboration on a major scientific project. The overall programmatic objective, as defined in the ITER Engineering Design Activities (EDA) Agreement, is to demonstrate the scientific and technological feasibility of fusion energy for peaceful purposes. ITER would accomplish this objective by demonstrating controlled ignition and extended burn of deuterium-tritium plasmas, with steady-state as an ultimate goal; by demonstrating technologies essential to a reactor in an integrated system; and by performing integrated testing of the high-heat flux and nuclear components required to utilize fusion energy for practical purposes. ITER, the so-called ''next step'' device to be built after the present-day tokamaks, will not generate any electric energy. It will be the task of the ITER successor, the ''Demonstration'' reactor, to generate the first electricity from fusion energy and demonstrate the economic feasibility of fusion reactors. The ITER EDA phase, due to last until July 1998, will encompass the design of the device and its auxiliary systems and facilities, including the preparation of engineering drawings. The EDA also incorporates validating research and development (R&D) work, including the development and testing of key components. During the EDA the site requirements will be established, and the necessary safety, environmental, and economic analyses will be performed. Detailed plans, including cost, manpower, and schedule, will be developed for the construction and assembly of ITER and for operations, maintenance, and decommissioning. In addition, proposals will be developed on approaches for joint implementation of the future construction and operation of ITER, in order to permit a decision about the construction of the reactor to be taken by the four parties by the end of the EDA. During the first 18 months of the EDA, design options derived from the objectives and general principles of the project have been reviewed and a reference design developed. In addition to the continuing activities on design, supporting short- and long-term R&D programs are being defined, and some of these activities have already begun in laboratories and industries in the countries that are involved in the project. The purpose of this paper is to review the status of the design, as it has been developed so far, emphasizing the design and integration of those components contained within the vacuum vessel of the ITER device. The components included in the in-vessel systems are divertor and first wall; blanket and shield; plasma heating, fueling, and vacuum pumping equipment; and remote handling equipment. RP LOUSTEAU, DC (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 284 EP 291 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600004 ER PT J AU GREEN, L STEFANI, CF MORGAN, GD LEE, VD MATTAS, R AF GREEN, L STEFANI, CF MORGAN, GD LEE, VD MATTAS, R TI A REVIEW OF ITER BLANKET DESIGNS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Changes in ITER requirements and conditions in the Engineering Design Activity (EDA), and the desire to obtain greater operating flexibility, led to a reconsideration of the ITER Conceptual Design Activity (CDA) blanket designs. The current strategy is to follow a two-tiered development approach: The reference design blanket is non-breeding, and satisfies only the basic performance phase (BPP) functional requirements. This blanket would need to be changed out for the extended performance phase (EPP). A lower level development effort is also underway on an tritium-breeding blanket. The decision as to which of the two designs to adopt will be made at the end of a two-year development effort. This paper describes the present candidate blankets and the issues associated with each of them. The reference design is a non-breeding, low temperature, low pressure, water cooled, austenitic stainless steel (316SS) blanket/shield (BS). The first wall (FW), which may be integral with or separate from the BS, is a bonded copper-alloy/SS structure with a beryllium coating. Critical issues here are copper-SS bonding, fabricability, and radiation damage and stress corrosion cracking of the SS. The breeding blanket utilizes vanadium alloy structural material, with lithium as the breeder. The coolants are either lithium (self-cooled) or high pressure helium. The primary issues here are the need to electrically insulate the flow channels, the qualification of vanadium as a structural material, and the fabrication of large vanadium structures. C1 MCDONNELL DOUGLAS CORP,ST LOUIS,MO 63166. ARGONNE NATL LAB,ARGONNE,IL 60439. RP GREEN, L (reprint author), WESTINGHOUSE SCI & TECHNOL CTR,1310 BEULAH RD,PITTSBURGH,PA 15235, USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 300 EP 315 PN 2 PG 16 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600006 ER PT J AU HOULBERG, WA ATTENBERGER, SE AF HOULBERG, WA ATTENBERGER, SE TI EVALUATION OF PUMPING AND FUELING REQUIREMENTS FOR THE ITER EDA SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID TRANSPORT AB The relationships between fueling (gas injection and pellets of various sizes and velocities), pumping in the divertor chamber (constrained by fuel processing and divertor design), core density (constrained by the desired fusion power and helium ash accumulation), separatrix density (constrained by divertor operation and density Limits) and plasma confinement models are examined for the International Engineering Tokamak Reactor (ITER) Engineering Design Activity (EDA) for guidance in the definition of design requirements for the pumping and fueling systems. Various combinations of gas and pellet injection are found to meet the constraints for operation at 1500 MW of fusion power and 1 bar.l/s (5.3 x 10(22) atoms/s) of DT pumping. Very low pumping reduces fuel processing requirements, but can lead to excessive helium accumulation depending on the particle transport properties. Isotopic tailoring of the fuel sources, e.g., 20-30% of the input fuel stream as tritium pellets and the rest as deuterium gas, can maintain the core fuel species mixture in the optimum range for fusion production (at least a 40-60 mixture) while reducing the tritium concentration in the edge region to 20-30%. This should reduce the tritium inventory in the plasma facing components, since that is typically governed by the fuel density mix near the plasma edge. A high density, low temperature ignited regime supported by deep pellet injection is shown to exist under some low confinement conditions. RP HOULBERG, WA (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 12 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 316 EP 321 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600007 ER PT J AU HOGAN, JT MARTYNOV, A AF HOGAN, JT MARTYNOV, A TI SENSITIVITY OF ITER MHD GLOBAL STABILITY TO EDGE PRESSURE-GRADIENTS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB In view of the preliminary nature of boundary models for reactor tokamaks, the sensitivity to edge gradients of the global mode MHD stability of the ITER EDA configuration has been examined. The POLAR-2D equilibrium and TORUS stability codes developed by the Keldysh Institute have been used. Transport-related profiles from the PRETOR transport code (developed by the ITER Joint Central Team) and axisymmetric equilibria for these profiles from the TEQ code (L.D. Pearlstein, LLNL) were taken as a starting point for the study. These baseline profiles are found to have quite high global stability limits, in the range g(Troyon) = 4 - 5. The major focus of this study is to examine global mode stability assuming small variations about the baseline profiles, changing the pressure gradients near the boundary. Such changes can be expected with an improved boundary model. Reduced stability limits are found in such cases, and unstable cases with g=2-3 are found. Thus, the assumption of ITER stability limits higher than g=2 must be treated with caution. C1 RUSSIAN ACAD SCI,KELDYSH INST APPL MATH,MOSCOW,RUSSIA. RP HOGAN, JT (reprint author), OAK RIDGE NATL LAB,DIV FUS ENERGY,POB 2078,OAK RIDGE,TN 37830, USA. OI Martynov, Alexander/0000-0003-0127-8947 NR 4 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 322 EP 326 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600008 ER PT J AU UCKAN, NA HOGAN, J HOULBERG, W GALAMBOS, J PERKINS, LJ HANEY, S POST, D KAYE, S AF UCKAN, NA HOGAN, J HOULBERG, W GALAMBOS, J PERKINS, LJ HANEY, S POST, D KAYE, S TI ITER DESIGN - PHYSICS BASIS FOR SIZE, CONFINEMENT CAPABILITY POWER LEVELS AND BURN CONTROL SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The ITER-EDA(93) design has been analyzed to evaluate the physics basis for: (i) size and design trade-off issues, (ii) confinement capability, (iii) power levels, and (iv) burn control. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP UCKAN, NA (reprint author), OAK RIDGE NATL LAB,POB 2009 MS-8072,OAK RIDGE,TN 37831, USA. RI Post, Douglass/L-3773-2014 OI Post, Douglass/0000-0001-9271-0023 NR 12 TC 7 Z9 7 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 327 EP 330 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600009 ER PT J AU HUMPHREYS, DA LEUER, JA KELLMAN, AG HANEY, SW BULMER, RH PEARLSTEIN, LD PORTONE, A AF HUMPHREYS, DA LEUER, JA KELLMAN, AG HANEY, SW BULMER, RH PEARLSTEIN, LD PORTONE, A TI TOWARD A DESIGN FOR THE ITER PLASMA SHAPE AND STABILITY CONTROL-SYSTEM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB A design strategy for an integrated shaping and stability control algorithm for ITER is described. This stategy exploits the natural multivariable nature of the system so that all poloidal field coils are used to simultaneously control all regulated plasma shape and position parameters. A nonrigid, flux-conserving, linearized plasma response model is derived using a variational procedure analogous to the ideal MHD Extended Energy Principle. Initial results are presented for the nonrigid plasma response model approach applied to an example DIII-D equilibrium. For this example, the nonrigid model is found to yield a higher passive growth rate than a rigid current-conserving plasma response model. Multivariable robust controller design methods are discussed and shown to be appropriate for the ITER shape control problem. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. JAPAN ATOM ENERGY RES INST,ITER JOINT CENT TEAM,NAKA,IBARAKI 31101,JAPAN. RP HUMPHREYS, DA (reprint author), GEN ATOM CO,POB 85608,SAN DIEGO,CA 92186, USA. NR 12 TC 3 Z9 3 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 331 EP 339 PN 2 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600010 ER PT J AU NEILSON, GH BATCHELOR, DB MIODUSZEWSKI, PK STRICKLER, DJ GOLDSTON, RJ JARDIN, SC BIALEK, JM KESSEL, CE MEDLEY, SS SCHMIDT, JA BULMER, RH HILL, DN NEVINS, WM THOMASSEN, KI BONOLI, PT PORKOLAB, M POLITZER, PA EDMONDS, PH AF NEILSON, GH BATCHELOR, DB MIODUSZEWSKI, PK STRICKLER, DJ GOLDSTON, RJ JARDIN, SC BIALEK, JM KESSEL, CE MEDLEY, SS SCHMIDT, JA BULMER, RH HILL, DN NEVINS, WM THOMASSEN, KI BONOLI, PT PORKOLAB, M POLITZER, PA EDMONDS, PH TI MISSION AND PHYSICS DESIGN OF THE TOKAMAK PHYSICS EXPERIMENT SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Improvements in the confinement, stability limits, current-drive efficiency and divertor performance, combined with steady-state operation, can lead to a more economical tokamak fusion reactor than one based on the present physics data base. The Tokamak Physics Experiment (TPX) is planned to extend the recent advances in these areas, achieved in pulsed tokamaks, to the steady-state regime. In so doing, it will develop a data base needed for the design of an economically attractive tokamak reactor. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139. GEN ATOM CO,FUS GRP,SAN DIEGO,CA 92121. UNIV TEXAS,FUS RES CTR,AUSTIN,TX 78712. RP NEILSON, GH (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. RI Edmonds, Phillip/A-1336-2009; Jardin, Stephen/E-9392-2010 NR 21 TC 7 Z9 7 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 343 EP 350 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600011 ER PT J AU BROWN, TG AF BROWN, TG TI THE TPX CONFIGURATION SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The TPX configuration has progressed since the March, 1993 Conceptual Design Review (CDR). Changes have been made to enhance operating performance and improve engineering design margins. Clearances have been added to subsystem envelopes to increase fabrication space and expand assembly tolerances; design modifications have been adopted to meet changes in physics requirements and to enhance maintenance features. Configuration details of magnet leads and services have been added and major subsystem clearance requirements for assembly/disassembly have been revisited. RP BROWN, TG (reprint author), PRINCETON PLASMA PHYS LAB,NORTHROP GRUMMAN,POB 451,PRINCETON,NJ 08543, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 351 EP 354 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600012 ER PT J AU SCHMIDT, JA AF SCHMIDT, JA TI THE ENGINEERING DESIGN OF THE TOKAMAK PHYSICS EXPERIMENT SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA RP SCHMIDT, JA (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 355 EP 360 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600013 ER PT J AU SWAIN, D GORANSON, P VONHALLE, A BERNABEI, S GREENOUGH, N AF SWAIN, D GORANSON, P VONHALLE, A BERNABEI, S GREENOUGH, N TI HEATING AND CURRENT DRIVE SYSTEMS FOR TPX SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The heating and current drive (H&CD) system proposed for the TPX tokamak will consist of ion cyclotron, neutral beam, and lower hybrid systems. It will have 17.5 MW of installed H&CD power initially, and can be upgraded to 45 MW. It will be used to explore advanced confinement and fully current-driven plasma regimes with pulse lengths of up to 1000 s. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP SWAIN, D (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 361 EP 365 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600014 ER PT J AU HEITZENROEDER, P BIALEK, J ELLIS, R KESSEL, C LIEW, S AF HEITZENROEDER, P BIALEK, J ELLIS, R KESSEL, C LIEW, S TI THE TPX VACUUM VESSEL AND IN-VESSEL COMPONENTS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The Tokamak Physics Experiment (TPX) is a superconducting tokamak with double-null diverters. TPX is designed for 1000-second discharges with the capability of being upgraded to steady state operation. High neutron yields resulting from the long duration discharges require that special consideration be given to materials and maintainability. A unique feature of the TPX is the use of a low activation, titanium alloy vacuum vessel. Double-wall vessel construction is used since it offers an efficient solution for shielding, bakeout and cooling. Contained within the vacuum vessel are the passive coil system, Plasma Facing Components (PFCs), magnetic diagnostics, and the internal control coils. All PFCs utilize carbon-carbon composites for exposed surfaces. RP HEITZENROEDER, P (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 371 EP 375 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600016 ER PT J AU RENNICH, MJ NELSON, BE AF RENNICH, MJ NELSON, BE TI TPX REMOTE MAINTENANCE AND SHIELDING SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The Tokamak Physics Experiment (TPX) machine design incorporates comprehensive planning for efficient and safe component maintenance. Three programmatic decisions have been made to insure the successful implementation of this objective. First, the tokamak incorporates radiation shielding to reduce activation of components and limit the dose rate to personnel working on the outside of the machine. This allows most of the ex-vessel equipment to be maintained through conventional ''hands-on'' procedures. Second, to the maximum extent possible, low activation materials will be used inside the shielding volume. This resulted in the selection of Titanium (Ti-6Al-4V) for the vacuum vessel and Plasma Facing Components (PFC) structures. The third decision stipulated that the primary in-vessel components will be replaced or repaired via remote maintenance tools specifically provided for the task. The component designers have been given the responsibility of incorporating maintenance design and for proving the maintainability of the design concepts in full-scale mockup tests prior to the initiation of final fabrication. Remote maintenance of the TPX machine is facilitated by general purpose tools provided by a special purpose design team. Major tools will include an in-vessel transporter, a vessel transfer system and a large component transfer container. In addition, tools such as manipulators and remotely operable impact wrenches will be made available to the component designers by this group. Maintenance systems will also provide the necessary controls for this equipment. RP RENNICH, MJ (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. OI Rennich, Mark/0000-0001-6945-0075 NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 376 EP 380 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600017 ER PT J AU LIEW, SL KU, LP AF LIEW, SL KU, LP TI AN OVERVIEW OF THE TPX NEUTRONICS AND SHIELDING ASPECTS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The Tokamak Physics Experiment (TPX) device, which is under conceptual design in the US., presents several neutronics and shielding issues that impact the machine design significantly. This paper presents an overview of the various issues and a summary of the various design analyses that have been performed thus far to quantify the issues and to guide the design toward near-optimal engineering solutions to the problems. RP LIEW, SL (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 381 EP 385 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600018 ER PT J AU HOSEA, J ADLER, JH ALLING, P ANCHER, C ANDERSON, H ANDERSON, JL ANDERSON, JW ARUNASALAM, V ASCIONE, G ASHCROFT, D BARNES, CW BARNES, G BATHA, S BELL, MG BELL, R BITTER, M BLANCHARD, W BRETZ, NL BRUNKHORST, C BUDNY, R BURGESS, T BUSH, H BUSH, CE CAMP, R CAORLIN, M CARNEVALE, H CAUFFMAN, S CHANG, Z CHENG, CZ CHRZANOWSKI, J COLLINS, J COWARD, G CROPPER, M DARROW, DS DAUGERT, R DELOOPER, J DUONG, H DUDEK, L DURST, R EFTHIMION, PC ERNST, D FAUNCE, J FISHER, R FONCK, RJ FREDD, E FREDRICKSON, E FROMM, N FU, GY FURTH, HP GARZOTTO, V GENTILE, C GETTELFINGER, G GILBERT, J GIOIA, J GOLIAN, T GORELENKOV, N GREK, B GRISHAM, LR HAMMETT, G HANSON, GR HAWRYLUK, RJ HEIDBRINK, W HERRMANN, HW HILL, KW HSUAN, H JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC KAMPERSCHROER, J KESNER, J KUGEL, H KWON, S LABIK, G LAM, NT LAMARCHE, PH LAWSON, E LEBLANC, B LEONARD, M LEVINE, J LEVINTON, FM LOESSER, D LONG, D LOUGHLIN, MJ MACHUZAK, J MANSFIELD, DK MARCHLIK, M MARMAR, ES MARSALA, R MARTIN, A MARTIN, G MASTROCOLA, V MAZZUCATO, E MAJESKI, R MAUEL, M MCCARTHY, MP MCCORMACK, B MCCUNE, DC MCGUIRE, KM MEADE, DM MEDLEY, SS MIKKELSEN, DR MILORA, SL MUELLER, D MURAKAMI, M MURPHY, JA NAGY, A NAVRATIL, GA NAZIKIAN, R NEWMAN, R NISHITANI, T NORRIS, M OCONNOR, T OLDAKER, M ONGENA, J OSAKABE, M OWENS, DK PARK, H PARK, W PAUL, SF PAVLOV, YI PEARSON, G PERKINS, F PERRY, E PERSING, R PETROV, M PHILLIPS, CK PITCHER, S POPOVICHEV, S PYSHER, R QUALLS, AL RAFTOPOULOS, S RAMAKRISHNAN, R RAMSEY, A RASMUSSEN, DA REDI, MH RENDA, G REWOLDT, G ROBERTS, D ROGERS, J ROSSMASSLER, R ROQUEMORE, AL RUCHOV, E SABBAGH, SA SASAO, M SCHILLING, G SCHIVELL, J SCHMIDT, GL SCILLIA, R SCOTT, SD SENKO, T SISSINGH, R SKINNER, C SNIPES, J SNOOK, P STENCEL, J STEVENS, J STEVENSON, T STRATTON, BC STRACHAN, JD STODIEK, W SYNAKOWSKI, E TANG, W TAYLOR, G TERRY, J THOMPSON, ME TIMBERLAKE, JR TOWNER, HH VONHALLE, A VANNOY, C WESTER, R WIELAND, R WILGEN, JB WILLIAMS, M WILSON, JR WINSTON, J WRIGHT, K WONG, D WONG, KL WOSKOV, P WURDEN, GA YAMADA, M YEUN, A YOSHIKAWA, S YOUNG, KM ZARNSTORFF, MC ZWEBEN, SJ AF HOSEA, J ADLER, JH ALLING, P ANCHER, C ANDERSON, H ANDERSON, JL ANDERSON, JW ARUNASALAM, V ASCIONE, G ASHCROFT, D BARNES, CW BARNES, G BATHA, S BELL, MG BELL, R BITTER, M BLANCHARD, W BRETZ, NL BRUNKHORST, C BUDNY, R BURGESS, T BUSH, H BUSH, CE CAMP, R CAORLIN, M CARNEVALE, H CAUFFMAN, S CHANG, Z CHENG, CZ CHRZANOWSKI, J COLLINS, J COWARD, G CROPPER, M DARROW, DS DAUGERT, R DELOOPER, J DUONG, H DUDEK, L DURST, R EFTHIMION, PC ERNST, D FAUNCE, J FISHER, R FONCK, RJ FREDD, E FREDRICKSON, E FROMM, N FU, GY FURTH, HP GARZOTTO, V GENTILE, C GETTELFINGER, G GILBERT, J GIOIA, J GOLIAN, T GORELENKOV, N GREK, B GRISHAM, LR HAMMETT, G HANSON, GR HAWRYLUK, RJ HEIDBRINK, W HERRMANN, HW HILL, KW HSUAN, H JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC KAMPERSCHROER, J KESNER, J KUGEL, H KWON, S LABIK, G LAM, NT LAMARCHE, PH LAWSON, E LEBLANC, B LEONARD, M LEVINE, J LEVINTON, FM LOESSER, D LONG, D LOUGHLIN, MJ MACHUZAK, J MANSFIELD, DK MARCHLIK, M MARMAR, ES MARSALA, R MARTIN, A MARTIN, G MASTROCOLA, V MAZZUCATO, E MAJESKI, R MAUEL, M MCCARTHY, MP MCCORMACK, B MCCUNE, DC MCGUIRE, KM MEADE, DM MEDLEY, SS MIKKELSEN, DR MILORA, SL MUELLER, D MURAKAMI, M MURPHY, JA NAGY, A NAVRATIL, GA NAZIKIAN, R NEWMAN, R NISHITANI, T NORRIS, M OCONNOR, T OLDAKER, M ONGENA, J OSAKABE, M OWENS, DK PARK, H PARK, W PAUL, SF PAVLOV, YI PEARSON, G PERKINS, F PERRY, E PERSING, R PETROV, M PHILLIPS, CK PITCHER, S POPOVICHEV, S PYSHER, R QUALLS, AL RAFTOPOULOS, S RAMAKRISHNAN, R RAMSEY, A RASMUSSEN, DA REDI, MH RENDA, G REWOLDT, G ROBERTS, D ROGERS, J ROSSMASSLER, R ROQUEMORE, AL RUCHOV, E SABBAGH, SA SASAO, M SCHILLING, G SCHIVELL, J SCHMIDT, GL SCILLIA, R SCOTT, SD SENKO, T SISSINGH, R SKINNER, C SNIPES, J SNOOK, P STENCEL, J STEVENS, J STEVENSON, T STRATTON, BC STRACHAN, JD STODIEK, W SYNAKOWSKI, E TANG, W TAYLOR, G TERRY, J THOMPSON, ME TIMBERLAKE, JR TOWNER, HH VONHALLE, A VANNOY, C WESTER, R WIELAND, R WILGEN, JB WILLIAMS, M WILSON, JR WINSTON, J WRIGHT, K WONG, D WONG, KL WOSKOV, P WURDEN, GA YAMADA, M YEUN, A YOSHIKAWA, S YOUNG, KM ZARNSTORFF, MC ZWEBEN, SJ TI DEUTERIUM-TRITIUM EXPERIMENTS ON THE TOKAMAK FUSION TEST REACTOR SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID TFTR; PLASMAS AB The deuterium-tritium (D-T) experimental program on the Tokamak Fusion Test Reactor (TFTR) is underway and routine tritium operations have been established. The technology upgrades made to the TFTR facility have been demonstrated to be sufficient for supporting both operations and maintenance for an extended D-T campaign. To date fusion power has been increased to similar to 9 MW and several physics results of importance to the D-T reactor regime have been obtained: electron temperature, ion temperature, and plasma stored energy all increase substantially in the D-T regime relative to the D-D regime at the same neutral beam power and comparable limiter conditioning; possible alpha electron heating is indicated and energy confinement improvement with average ion mass is observed; and alpha losses appear to be classical with no evidence of TAE mode activity up to the P-FUS similar to 6 MW level. Instability in the TAE mode frequency range has been observed at P-FUS > 7 MW and its effect on performance is under investigation. Preparations are underway to enhance the alpha particle density further by increasing fusion power and by extending the neutral beam pulse length to permit alpha particle effects of relevance to the ITER regime to be more fully explored. RP HOSEA, J (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. RI Wurden, Glen/A-1921-2017; Sabbagh, Steven/C-7142-2011; Hammett, Gregory/D-1365-2011; Ernst, Darin/A-1487-2010; Cheng, Chio/K-1005-2014; Yamada, Masaaki/D-7824-2015 OI Wurden, Glen/0000-0003-2991-1484; Hammett, Gregory/0000-0003-1495-6647; Ernst, Darin/0000-0002-9577-2809; Yamada, Masaaki/0000-0003-4996-1649 NR 41 TC 5 Z9 5 U1 1 U2 5 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 389 EP 398 PN 2 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600019 ER PT J AU LAMARCHE, PH ANDERSON, JL GENTILE, CA HAWRYLUK, RJ HOSEA, J KALISH, M KOZUB, T MURRAY, H NAGY, A RAFTOPOULOS, S ROSSMASSLER, RL SISSINGH, RAP SWANSON, J TULIPANO, F VIOLA, M VOORHEES, DR WALTERS, RT AF LAMARCHE, PH ANDERSON, JL GENTILE, CA HAWRYLUK, RJ HOSEA, J KALISH, M KOZUB, T MURRAY, H NAGY, A RAFTOPOULOS, S ROSSMASSLER, RL SISSINGH, RAP SWANSON, J TULIPANO, F VIOLA, M VOORHEES, DR WALTERS, RT TI TRITIUM PROCESSING AND MANAGEMENT DURING D-T EXPERIMENTS ON TFTR SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB TFTR performance has surpassed many of the previous tokamak records. This has been made possible by the use of tritium as fuel for DT plasma discharges. Stable operations of tritium systems provide for safe, routine DT operation of TFTR. In the preparation for DT operation, in the commissioning of the tritium systems and in the operation of the Nuclear Facility several key lessons have been learned. They include: the facility must take the lead in interpreting the applicable regulations and orders and then seek regulator approval; the use of ultra high vacuum technology in tritium system design and construction simplifies and enhances operations and maintenance; and central facility control under a single supervisory position is crucial to safely orchestrate operational and maintenance activities. RP LAMARCHE, PH (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 3 TC 11 Z9 11 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 427 EP 433 PN 2 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600023 ER PT J AU LANG, DD BULMER, RJ CHAPLIN, MR OCONNOR, TG SLACK, DS WONG, RL ZBASNIK, JP SCHULTZ, JH DIATCHENKO, N MONTGOMERY, DB PILLSBURY, RD WANG, PW MYATT, L BROWN, TG CITROLO, JC AF LANG, DD BULMER, RJ CHAPLIN, MR OCONNOR, TG SLACK, DS WONG, RL ZBASNIK, JP SCHULTZ, JH DIATCHENKO, N MONTGOMERY, DB PILLSBURY, RD WANG, PW MYATT, L BROWN, TG CITROLO, JC TI THE SUPERCONDUCTING MAGNET SYSTEM FOR THE TOKAMAK PHYSICS EXPERIMENT SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The superconducting magnet system for the Tokamak Physics experiment (TPX) will be the first all superconducting magnet system for a Tokamak, where the poloidal field coils, in addition to the toroidal field coils are superconducting. The magnet system is designed to operate in a steady slate mode, and to initiate the plasma discharge ohmically. The toroidal field system provides a peak field of 4.0 Tesla on the plasma axis at a plasma major radius of 2.25 m. The peak field on the niobium 3-tin, cable-in-conduit (CIC) conductor is 8.4 Tesla for the 16 toroidal field coils. The toroidal field coils must absorb approximately 5 kW due to nuclear heating, eddy currents, and other sources. The poloidal field system provides a total of 18 volt seconds to initiate the plasma and drive a plasma current up to 2 MA. The poloidal field system consists of 14 individual coils which are arranged symmetrically above and below the horizontal mid plane. Four pairs of coils make up the central solenoid, and three pairs of poloidal ring coils complete the system. The poloidal field coils all use a cable-in-conduit conductor, using either niobium 3-tin (NB3Sn) or niobium titanium (NbTi) superconducting strands depending on the operating conditions for that coil. All of the coils are cooled by flowing supercritical helium, with inlet and outlet connections made on each double pancake. The superconducting magnet system has gone through a conceptual design review, and is in preliminary design started by the LLNL/MIT/PPPL collaboration. A number of changes have been made in the design since the conceptual design review, and are described in this paper. The majority of the design and all fabrication of the magnet system will be accomplished by industry, which will shortly be taking over the preliminary design. The magnet system is expected to be completed in early 2000. C1 MIT,CAMBRIDGE,MA 02139. PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP LANG, DD (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 458 EP 464 PN 2 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600027 ER PT J AU BROMBERG, L BATHKE, CG KESSEL, C TITUS, P AF BROMBERG, L BATHKE, CG KESSEL, C TITUS, P TI DESIGN OF POLOIDAL FIELD SYSTEMS FOR TF COIL SHEAR MINIMIZATION SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Two methods of optimizing the poloidal field system are compared. The first one is the conventional energy-minimization scheme. The second relies in minimizing the shear stresses in the toroidal field coil due to the out-of-plane loads. The optimization process is done on fixed plasma parameters, with A = 4. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM. PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ. STONE & WEBSTER ENGN CORP,BOSTON,MA. RP BROMBERG, L (reprint author), MIT,CTR PLASMA FUS,CAMBRIDGE,MA 02139, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 473 EP 477 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600029 ER PT J AU ANDERSON, W ARMIJO, E BARTHELL, B BARTOS, J BUSH, H FOREMAN, L GARCIA, F GOBBY, P GOMEZ, V GURULE, V HATCH, D HENNEKE, B MANZANARES, R MOORE, J REEVES, G RIVERA, G SALAZAR, M SALZER, L AF ANDERSON, W ARMIJO, E BARTHELL, B BARTOS, J BUSH, H FOREMAN, L GARCIA, F GOBBY, P GOMEZ, V GURULE, V HATCH, D HENNEKE, B MANZANARES, R MOORE, J REEVES, G RIVERA, G SALAZAR, M SALZER, L TI LOADS FOR PULSED-POWER CYLINDRICAL IMPLOSION EXPERIMENTS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Pulse power can be used to generate high energy density conditions in convergent hollow cylindrical geometry through the use of appropriate electrode configuration and cylindrical loads. Cylindrically symmetric experiments are conducted with the Pegasus-II inductive store, capacitor energized pulse power facility at Los Alamos using both precision machined cylindrical liner loads and low mass vapor deposited cylindrical foil loads. The liner experiments investigate solid density hydrodynamic topics. Foil loads vaporize from Joule heating to generate an imploding cylindrical plasma which can be used to simulate some fluxes associated with fusion energy processes. Similar experiments are conducted with ''Procyon'' inductive store pulse power assemblies energized by explosively driven magnetic flux compression. RP ANDERSON, W (reprint author), LOS ALAMOS NATL LAB,MS E-549,LOS ALAMOS,NM 87545, USA. NR 11 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 486 EP 492 PN 2 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600031 ER PT J AU FEDERICI, G MATERA, R CHIOCCHIO, S DIETZ, J JANESCHITZ, G DRIEMEYER, D HAINES, J TILLACK, M ULRICKSON, M AF FEDERICI, G MATERA, R CHIOCCHIO, S DIETZ, J JANESCHITZ, G DRIEMEYER, D HAINES, J TILLACK, M ULRICKSON, M TI INNOVATIVE DESIGN AND MATERIAL SOLUTIONS OF THERMAL CONTACT LAYERS FOR HIGH HEAT-FLUX APPLICATIONS IN FUSION DEVICES SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB One difficulty associated with the design and development of sacrificial plasma facing components that have to handle the high heat and particle fluxes in ITER is achieving the necessary contact conductance between the plasma protection material and the high-conductivity substrate in contact with the coolant. This paper presents a novel bond idea which is proposed as one of the options for the sacrificial energy dump targets located at the bottom of the divertor legs. The bonded joint in this design concept provides thermal and electrical contact between the armour and the cooled sub-structure while promoting remote, in-situ maintenance repair and an easy replaceability of the armour part without disturbing the cooling pipes or rewelding neutron irradiated materials. To provide reliable and demountable adhesion, the bond consists of a metal ahoy, treated in the semi-solid phase so that it leads to a fine dispersion of a globular solid phase into a liquid matrix (rheocast process)(1). This thermal bond layer would normally operate in the solid state but could be brought reversibly to the semi-solid state during the armour replacement simply by heating it slightly above its solidus temperature. Material and design options are discussed in this paper. Possible methods of installation and removal are described, and lifetime considerations are addressed. In order to validate this concept within the ITER time-frame, a R&D programme must be rapidly implemented. C1 MCDONNELL DOUGLAS AEROSP,ST LOUIS,MO 63166. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV CALIF LOS ANGELES,DEPT MECH AEROSP & NUCL ENGN,LOS ANGELES,CA 90024. SANDIA NATL LABS,DEPT FUS TECH,ALBUQUERQUE,NM 87185. RP FEDERICI, G (reprint author), ITER JWS GARCHING CO CTR,BOLTZMANNSTR 2,D-85748 GARCHING,GERMANY. NR 7 TC 2 Z9 2 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 493 EP 497 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600032 ER PT J AU MCSMITH, MD LOESSER, GD OWENS, DK AF MCSMITH, MD LOESSER, GD OWENS, DK TI MODIFICATION AND FINAL ALIGNMENT OF THE TFTR BUMPER LIMITER SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB During the past three Tokamak Fusion Test Reactor (TFTR) vacuum vessel machine openings, an extensive effort was undertaken to optimize the distribution of heating of the bumper limiter tiles. The optimization was achieved by locating the limiter tiles relative to the toroidal magnetic field and adjusting their position relative to the magnetic field rather than to fixed points in the vacuum vessel walls. This paper will discuss the results of these alignments as measured during operation with the limiter thermocouple system and subsequent visual inspection during this past TFTR vacuum vessel opening. During the most recent in-vessel inspection (January 1993), damage to the top and bottom rows of the bumper limiter tiles was noted. More tiles were damaged on the lower row than the upper row. Tiles on the right side of the bottom row and to a lesser extent tiles on the left side of the top row were damaged. The location of the damage corresponds to the plasma power flux direction. Theories explaining the asymmetric damage (bottom versus top) are summarized. Princeton Plasma Physics Laboratory (PPPL) began a program to replace 223 of the originally installed tiles made from POCO AFX-5Q graphite. Of these 223 tiles, 151 were replaced with tiles made from carbon-fiber-composite (CFC) and 158 of these tiles were redesigned for installation on the top or bottom rows. The re-designed tiles have a tapered edge that reduces the angle of incidence of the power flux on the edge surface that was over-heating. This paper will review the in-vessel work and discuss the final modification of the TFTR bumper limiter to alleviate further damage at these locations prior to DT operation of TFTR. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP MCSMITH, MD (reprint author), MCDONNELL DOUGLAS AEROSP,POB 516,ST LOUIS,MO 63166, USA. NR 3 TC 6 Z9 6 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 498 EP 502 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600033 ER PT J AU HASSANEIN, A AF HASSANEIN, A TI PLASMA DISRUPTION MODELING AND SIMULATION SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Disruptions in tokamak reactors are considered a limiting factor to successful operation and a reliable design. The behavior of plasma-facing components during a disruption is critical to the overall integrity of the reactor. Erosion of plasma facing-material (PFM) surfaces due to thermal energy dump during the disruption can severely limit the lifetime of these components and thus diminish the economic feasibility of the reactor. A comprehensive understanding of the interplay of various physical processes during a disruption is essential for determining component lifetime and potentially improving the performance of such components. There are three principal stages in modeling the behavior of PFM during a disruption. Initially, the incident plasma particles will deposit their energy directly on the PFM surface, heating it to a very high temperature where ablation occurs. Models for plasma-material interactions have been developed and used to predict material thermal evolution during the disruption. Within a few microseconds after the start of the disruption, enough material is vaporized to intercept most of the incoming plasma particles. Models for plasma-vapor interactions are necessary to predict vapor cloud expansion and hydrodynamics. Continuous heating of the vapor cloud above the material surface by the incident plasma particles will excite, ionize, and cause vapor atoms to emit thermal radiation. Accurate models for radiation transport in the vapor are essential for calculating the net radiated flux to the material surface which determines the final erosion thickness and consequently component lifetime. A comprehensive model that takes into account various stages of plasma-material interaction has been developed and used to predict erosion rates during reactor disruption, as well during induced disruption in laboratory experiments. Differences between various simulation experiments and reactor conditions are discussed. A two-dimensional radiation transport model has been developed to particularly simulate the effect of small test samples used in laboratory disruption experiments. RP HASSANEIN, A (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,BLDG 207,ARGONNE,IL 60439, USA. NR 7 TC 15 Z9 15 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 532 EP 539 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600040 ER PT J AU HIROOKA, Y WON, J KELLER, S BOIVIN, R KHANDAGLE, M BROOKS, JN AF HIROOKA, Y WON, J KELLER, S BOIVIN, R KHANDAGLE, M BROOKS, JN TI EVALUATION OF EROSION AND LIFETIME OF ITER DIVERTOR CANDIDATE MATERIALS AND RELEVANT DATA FROM RECENT EXPERIMENTS IN THE PISCES-B MOD FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID TRANSPORT; PLASMA AB Divertor materials erosion and lifetime is a critical issue in designing plasma-facing components (PFCs) for ITER. Currently, three materials are considered as candidates to be used for the divertor target plate, namely, beryllium, carbon and tungsten. In this paper, major issues associated with the use of these candidates are reviewed and relevant data obtained from recent PISCES experiments will be discussed with the main emphasis on the wall lifetime issue. C1 ARGONNE NATL LAB,FUS POWER PROGRAM,ARGONNE,IL 60439. RP HIROOKA, Y (reprint author), UNIV CALIF LOS ANGELES,INST PLASMA & FUS RES,LOS ANGELES,CA 90024, USA. OI Keller, Scott M./0000-0001-5160-7839 NR 19 TC 8 Z9 8 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 540 EP 545 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600041 ER PT J AU NIEMER, KA GILLIGAN, JG CROESSMANN, CD AF NIEMER, KA GILLIGAN, JG CROESSMANN, CD TI RESULTS FROM COMPUTATIONAL AND EXPERIMENTAL MODELING OF RUNAWAY ELECTRON DAMAGE ON PLASMA-FACING COMPONENTS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The purpose of this research was to extend the theoretical and experimental knowledge of runaway electron damage-impact-bombardment on plasma facing components and materials in magnetic fusion devices. The emphasis of this work involved computational modeling and experimental studies to investigate runaway electron energy deposition and thermal response in plasma facing materials. The goals were: 1) to develop a computational model to study and analyze runaway electron damage, 2) to characterize runaway electron parameters, and 3) to perform experiments to analyze runaway electron damage. These goals were accomplished by first assembling the PTA code package. PTA is a unique application of PATRAN, the Integrated TIGER Series (ITS), and ABAQUS for modeling high energy electron impact on magnetic fusion materials and components. The PTA code package provides a three-dimensional, time dependent, computational code package which predicts material response from runaway bombardment under most runaway conditions (i.e., electron energy, incident angle, energy density, and deposition time). As part of this research, PTA was used to study energy deposition and material response in several design applications, to analyze damaged material, and to analyze several experiments. Runaway electron characterization was determined through parametric studies, analysis of damaged materials, and analysis of experimental results. Characterization provided information on electron energy, incident angle, current deposition time, and volume of material impacted by runaway electrons. Finally an experiment was performed on the Advanced Toroidal Facility (ATF) at Oak Ridge National Laboratory to study runaway electron damage. The experiment provided information on the runaway electron energy and current in ATF, as well as supplemented the existing experimental knowledge of runaway electron damage. C1 N CAROLINA STATE UNIV,DEPT NUCL ENGN,RALEIGH,NC 27695. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP NIEMER, KA (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,AIKEN,SC 29808, USA. NR 10 TC 0 Z9 0 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 546 EP 550 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600042 ER PT J AU HOULBERG, WA ATTENBERGER, SE AF HOULBERG, WA ATTENBERGER, SE TI EVALUATION OF CURRENT DRIVE REQUIREMENTS AND OPERATING CHARACTERISTICS OF A HIGH BOOTSTRAP FRACTION ADVANCED TOKAMAK REACTOR SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The reactor potential of some advanced physics operating modes proposed for the TPX physics program [1] are examined. A moderate aspect ratio (A = 4.5 as in TPX), 2 GW reactor (see Table I for parameters) is analyzed because of its potential for steady-state, noninductive operation with high bootstrap current fraction. Particle, energy and toroidal current equations are evolved to steady-state conditions using the 1-1/2-D time-dependent WHIST transport code [2]. The solutions are therefore consistent with particle, energy and current sources and assumed transport models. Fast wave current drive (FWCD) provides the axial seed current. The bootstrap current typically provides 80-90% of the current, while feedback on the lower hybrid current drive (LHCD) power maintains the total current. The sensitivity of the plasma power amplification factor, Q = P-fus/P-aux, to variations in the plasma properties is examined. The auxiliary current drive power, P-aux = P-LH + P-FW; bootstrap current fraction; current drive efficiency; and other parameters are evaluated. The plasma is thermodynamically stable for the energy confinement model assumed (a multiple of ITER89P). The FWCD and LHCD sources provide attractive control possibilities, not only for the current profile, but also for the total fusion power since the gain on the incremental auxiliary power is typically 10-30 in these calculations when overall and Q approximate to 30. RP HOULBERG, WA (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 13 TC 4 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 566 EP 571 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600045 ER PT J AU WERLEY, KA BATHKE, CG AF WERLEY, KA BATHKE, CG TI STARTUP AND SHUTDOWN OF THE PULSAR TOKAMAK REACTOR SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Startup conditions are examined for a pulsed tokamak reactor that uses only inductive plasma current drive for startup, burn and shutdown. A zero-dimensional (profile-averaged) model that describes plasma power and particle balance equations is used to study several aspects of plasma startup and shutdown, including optimization of the startup pathway tradeoff of auxiliary startup heating power versus startup time, volt-second consumtion, thermal stability and partial-power operations. RP WERLEY, KA (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 582 EP 587 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600048 ER PT J AU WADE, MR HOGAN, JT HILLIS, DL MAINGI, R MENON, MM BURRELL, KH GROEBNER, RJ MAHDAVI, MA WEST, WP FINKENTHAL, DF AF WADE, MR HOGAN, JT HILLIS, DL MAINGI, R MENON, MM BURRELL, KH GROEBNER, RJ MAHDAVI, MA WEST, WP FINKENTHAL, DF TI HELIUM TRANSPORT AND EXHAUST STUDIES IN DIII-D SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID PARTICLE-TRANSPORT; D TOKAMAK; CONFINEMENT; PLASMAS; TEXTOR; PUMP AB A better understanding of helium transport in the plasma core and edge in enhanced confinement regimes is now emerging from recent experimental studies on DIIID. Overall, the results are encouraging with significant helium exhaust obtained in a diverted, ELMing H-mode plasma, with tau*(He)/tau(E) similar to 10 and transport studies E indicating that D-He/X(eff) similar to 1 in all plasma conditions studied to date. However, measurements in the core and pumping plenum show a significant dilution of helium as it flows from the plasma core to the pumping plenum. Such dilution could be the limiting factor in the overall removal rate of helium in a reactor system. C1 GEN ATOM CO,DIII D TEAM,SAN DIEGO,CA 92186. RP WADE, MR (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 21 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 595 EP 602 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600050 ER PT J AU CHIOCCHIO, S FEDERICI, G JANESCHITZ, G TIVEY, R BAXI, C HAINES, JR ULRICKSON, MA AF CHIOCCHIO, S FEDERICI, G JANESCHITZ, G TIVEY, R BAXI, C HAINES, JR ULRICKSON, MA TI CONCEPT DEVELOPMENT AND PERFORMANCE ASSESSMENT OF THE POWER EXHAUST STRUCTURE OF THE ITER DIVERTOR SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The ITER Divertor design is based on the idea of extinguishing the plasma flame in a gas target. According to this scheme a large part of the power entering the divertor region would be dissipated through atomic and molecular reactions. These processes must take place along the whole extension of the divertor throat, in order to limit the thermal loads and particle fluxes onto the target. Thus, the divertor channel walls have to be shaped in order to achieve an adequate heat removal capability and to allow an effective recirculation of the gas from the target to the upper part of the divertor region. This paper describes the main features of the Power Exhaust Structure of the ITER Divertor, which composes the side wall of the divertor channel. In the selected design, the side wall is formed by wing like plates (fins/vanes) twisted 45 degrees in the toroidal direction towards the incoming magnetic field lines. The shape and size of these vanes are determined by the requirement for providing a highly transparent wall, coupled with the need to minimize the thermal deflections and stresses of the structure induced by thermal and electromagnetic loads. The wings are made of copper and protected from the plasma by armor made from either Be or W. In this paper we present the basic features of the proposed design and report on the analyses carried out to assess the behavior of the vanes under the dominant loads. Also, the paper presents an assessment of the concept from the point of view of component fabrication, based on results of preliminary studies carried out to support the design of the ITER divertor. C1 GEN ATOM CO,DIV FUS,SAN DIEGO,CA 92186. OAK RIDGE NATL LAB,DIV FUS ENERGY,OAK RIDGE,TN 37831. SANDIA NATL LABS,DEPT FUS TECHNOL,ALBUQUERQUE,NM 87185. RP CHIOCCHIO, S (reprint author), MAX PLANCK INST PLASMA PHYS,ITER JWS GARCHING CO CTR,BOLTZMANNSTR 2,D-85748 GARCHING,GERMANY. NR 10 TC 2 Z9 2 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 628 EP 633 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600055 ER PT J AU WILLMS, RS KONISHI, S OKUNO, K AF WILLMS, RS KONISHI, S OKUNO, K TI USE OF MAGNESIUM FOR RECOVERING HYDROGEN ISOTOPES FROM TRITIATED-WATER SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Reacting tritiated water with hot metal to recover the tritium from tritiated water has been practiced for considerable time. A metal frequently used for this purpose has been uranium. Recent work at the Tritium Systems Test Assembly at Los Alamos National Laboratory has focused on using magnesium for this purpose. This work was done as part of the Annex IV collaboration between the US Department of Energy/TSTA and the Japan Atomic Energy Research Institute/Tritium Processing Laboratory. Magnesium appears to have reactive properties that are as good as uranium and possibly better, and, of course, magnesium is easier to handle and less strictly controlled. Both bench-scale and practical-scale experiments were conducted with magnesium, including tests with tritiated water. Mg bed construction techniques and operating parameters were determined. Testing showed that the Mg packed bed was very effective for recovering hydrogen isotopes from water. However, when used for this purpose, either Mg or U is irreversibly consumed and must be disposed of as tritiated waste. It follows that this processing technique would be inappropriate for a large tritiated water processing operation. However, this technique may find utility for small-scale systems. C1 JAPAN ATOM ENERGY RES INST,NAKA,IBARAKI 31911,JAPAN. RP WILLMS, RS (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 3 TC 5 Z9 7 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 659 EP 663 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600060 ER PT J AU MACK, JM HAUER, AA DELAMATER, ND HSING, WW WATT, RG BAKER, DA HARRIS, DB MAGELSSEN, GR WALLACE, JM SUTER, L RESS, D POWERS, L LANDEN, O THIESSEN, R PHILLION, D AMENDT, P AF MACK, JM HAUER, AA DELAMATER, ND HSING, WW WATT, RG BAKER, DA HARRIS, DB MAGELSSEN, GR WALLACE, JM SUTER, L RESS, D POWERS, L LANDEN, O THIESSEN, R PHILLION, D AMENDT, P TI REVIEW OF DRIVE SYMMETRY MEASUREMENT AND CONTROL EXPERIMENTS ON THE NOVA LASER SYSTEM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Symmetric radiation drive is required for achieving ignition in laboratory experiments. Over the last two years, a concerted series of drive symmetry experiments have been performed on the Nova laser system. The goals of this work were to develop measurement techniques and to apply them to symmetry variation and control experiments. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP MACK, JM (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 9 TC 1 Z9 1 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 687 EP 695 PN 2 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600065 ER PT J AU FOREMAN, LR GOBBY, P BARTOS, J BROOKS, PM BUSH, H GOMEZ, V ELLIOTT, N MOORE, J RIVERA, G SALAZAR, M SALZER, L AF FOREMAN, LR GOBBY, P BARTOS, J BROOKS, PM BUSH, H GOMEZ, V ELLIOTT, N MOORE, J RIVERA, G SALAZAR, M SALZER, L TI HOHLRAUM MANUFACTURE FOR INERTIAL CONFINEMENT FUSION SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Hohlraums are an integral part of indirect drive targets for Inertial Confinement Fusion (ICF) research. Hohlraums are made by an electroforming process that combines elements of micromachining and coating technology. We describe how these target elements are made and extensions of the method that allow fabrication of other, more complex target components. RP FOREMAN, LR (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,POB 1663,MAIL STOP E549,LOS ALAMOS,NM 87545, USA. NR 3 TC 3 Z9 3 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 696 EP 701 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600066 ER PT J AU VANWONTERGHEM, BM MURRAY, JR SPECK, DR CAMPBELL, JH AF VANWONTERGHEM, BM MURRAY, JR SPECK, DR CAMPBELL, JH TI PERFORMANCE OF THE NIF PROTOTYPE BEAMLET SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Beamlet is a full scale single beam prototype laser system, built to demonstrate the laser technology and performance of the 192 beam National Ignition Facility (NIF) fusion laser driver. Both laser systems apply multipass amplifier architectures. By passing the beam four times through the large aperture amplifier sections, the small signal gain during the first few passes is used efficiently to reduce expensive staged amplifier chains. The beamlet prototype laser integrates results of development programs for large aperture components: large aperture optical switch, polarizers, 2 x 2 multisegment amplifiers and new pulse generation and preamplification techniques. We report on performance test results of the recently completed 1 omega-laser section of Beamlet. RP VANWONTERGHEM, BM (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94551, USA. NR 8 TC 9 Z9 11 U1 1 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 702 EP 707 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600067 ER PT J AU SLUYTER, MM AF SLUYTER, MM TI DIRECTIONS FOR THE US ICF PROGRAM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The ICF program's quest for thermonuclear ignition and burn is described. A historical perspective is discussed as well as the current program, which includes the National Ignition Facility. Future directions for the program include its mission for defense, energy, and basic science. RP SLUYTER, MM (reprint author), US DOE,OFF RES & INERTIAL FUS,DP-11,WASHINGTON,DC 20585, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 711 EP 716 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600068 ER PT J AU CAMPBELL, EM AF CAMPBELL, EM TI THE NATIONAL-IGNITION-FACILITY PROJECT SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The mission of the National Ignition Facility is to achieve ignition and gain in inertial confinement fusion targets in the laboratory. The facility will be used for defense applications such as weapons physics and weapons effects testing, and for civilian applications such as fusion energy development and fundamental studies of matter at high temperatures and densities. This paper reviews the design, schedule, and costs associated with the construction project. RP CAMPBELL, EM (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-490,LIVERMORE,CA 94550, USA. NR 3 TC 24 Z9 24 U1 2 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 755 EP 766 PN 2 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600074 ER PT J AU HUNT, JT MANES, KR MURRAY, JR RENARD, PA SAWICKI, R TRENHOLME, JB WILLIAMS, W AF HUNT, JT MANES, KR MURRAY, JR RENARD, PA SAWICKI, R TRENHOLME, JB WILLIAMS, W TI LASER DESIGN BASIS FOR THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID INERTIAL-CONFINEMENT FUSION; POWER AB Controlled nuclear fusion initiated by highly intense laser beams has been the subject of experiment for many years. The National Ignition Facility (NIF) represents the culmination of design efforts to provide a laser facility that will successfully demonstrate fusion ignition in the laboratory. In this so-called inertial confinement approach, energetic driver beams (laser, X ray, or charged particle) heat the outer surface of a spherical capsule containing deuterium and tritium (DT) fuel. As the capsule surface explosively evaporates, reaction pressure compresses the DT fuel causing the central core of the fuel to reach extreme density and temperature. When the central temperature is high enough, DT fusion reactions occur. The energy released from these reactions further heats the compressed fuel, and fusion burn propagates outward through the colder regions of the capsule much more rapidly than the inertially confined capsule can expand. The resulting fusion reactions yield many times more energy than was absorbed from the driver beams. Figure I summarizes the inertial confinement fusion (ICF) process. RP HUNT, JT (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. RI Trenholme, John/M-4805-2016 OI Trenholme, John/0000-0003-3673-6653 NR 8 TC 11 Z9 12 U1 0 U2 6 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 767 EP 771 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600075 ER PT J AU TOBIN, M KARPENKO, V HAGANS, K ANDERSON, A LATKOWSKI, J WARREN, R WAVRIK, R GARCIA, R BOYES, J AF TOBIN, M KARPENKO, V HAGANS, K ANDERSON, A LATKOWSKI, J WARREN, R WAVRIK, R GARCIA, R BOYES, J TI TARGET AREA DESIGN BASIS AND SYSTEM PERFORMANCE FOR THE NATIONAL IGNITION FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP TOBIN, M (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 5 TC 3 Z9 3 U1 1 U2 5 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 772 EP 779 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600076 ER PT J AU WAVRIK, R DEMPSEY, F ANDERSON, A BOYES, J GARCIA, R TOBIN, M OLSON, C KARPENKO, V LATKOWSKI, J AF WAVRIK, R DEMPSEY, F ANDERSON, A BOYES, J GARCIA, R TOBIN, M OLSON, C KARPENKO, V LATKOWSKI, J TI TARGET AREA CHAMBER SYSTEM-DESIGN FOR THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The National Ignition Facility (NIF) is a proposed Department of Energy facility which will contribute to the resolution of important Defense Program and inertial fusion energy issues for energy production in the future. The NIF will consist of a laser system with 192 independent beamlets transported to a target chamber. The target chamber is a multi-purpose structure that provides the interface between the target and the laser optics. The chamber must be capable of achieving moderate vacuum levels in reasonable times; it must remain dimensionally stable within micron tolerances, provide support for the optics, diagnostics, and target positioner; it must minimize the debris from the x-ray and laser light environments; and it must be capable of supporting external neutron shielding. The chamber must also be fabricated from a low neutron activation material. The fusion reaction in the target gives off neutrons, x-ray and gamma rays. The x-rays and gamma rays interact with the interior of the target chamber wall while neutrons penetrate the wall. In order to minimize the neutron activation of components outside the target chamber and to absorb gammas emitted from the activated chamber, shielding will be placed immediately outside the chamber. The target chamber contains the target positioner. The target positioner moves the target from outside the chamber to the center of the chamber and positions the target at the focal spot of the laser beams. The target positioner must be survivable in a harsh radioactive environment. The materials used must be low activation and have a high stiffness to weight ratio to maintain target stability. This paper describes the conceptual design of the target chamber, target postioner, and shielding for the NIF. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP WAVRIK, R (reprint author), SANDIA NATL LABS,EG&G,POB 5800,MS 1184,ALBUQUERQUE,NM 87185, USA. NR 6 TC 0 Z9 0 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 785 EP 790 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600078 ER PT J AU RHODES, MA WOODS, B DEYOREO, J ATHERTON, J AF RHODES, MA WOODS, B DEYOREO, J ATHERTON, J TI PLASMA ELECTRODE POCKELS CELLS FOR THE BEAMLET AND NIF LASERS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB We describe Plasma Electrode Pockels Cells (PEPC) for the Beamlet laser and the proposed National Ignition Facility (NIF) laser. These PEPCs, together with passive polarizers, function as large aperture (>35 x 35 cm(2)) optical switches enabling the design of high-energy (>5 kJ), multipass laser amplifiers. In a PEPC, plasma discharges form on both sides of a thin (1 cm) electro-optic crystal (KDP). These plasma discharges produce highly conductive and transparent electrodes that facilitate rapid (<100 ns) and uniform charging of the KDP up to the halfwave voltage (17 kV) and back to zero volts. We discuss the operating principles, design, and optical performance of the Beamlet PEPC and briefly discuss our plans to extend PEPC technology for the NIF. RP RHODES, MA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808 L-490,LIVERMORE,CA 94550, USA. NR 6 TC 0 Z9 0 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 791 EP 798 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600079 ER PT J AU LARSON, DW ANDERSON, R BOYES, J AF LARSON, DW ANDERSON, R BOYES, J TI POWER CONDITIONING FOR THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB A cost-effective, 320-MJ power-conditioning system has been completed for the proposed National Ignition Facility (NIF). The design features include metallized dielectric capacitors, a simple topology, and large (1.6-MJ) module size. Experimental results address the technical risks associated with the design. C1 AMER CONTROL ENGN,SAN DIEGO,CA 92126. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP LARSON, DW (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808 L-493,LIVERMORE,CA 94551, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 799 EP 803 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600080 ER PT J AU ANDERSON, AT TOBIN, MT PETERSON, PF AF ANDERSON, AT TOBIN, MT PETERSON, PF TI X-RAY RESPONSE OF NATIONAL-IGNITION-FACILITY FIRST SURFACE MATERIALS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA ID REACTOR AB The ablation of first surface materials by x rays is a primary threat to the final optics in the NIF target chamber. To meet the operational goals of the facility, the designs of the chamber wall, target holder and diagnostic surfaces must minimize ablation by x rays, typically by specifying materials that ate low-Z, high temperature resistant, and shock resistant. Additionally, the response of the optics to direct target emissions must be understood. This paper describes some experimental and modeling work to develop the validated computer models necessary to quantify the x-ray response of various materials. These codes and further experiments will then confirm the ability of NIF first surface designs to meet functional requirements. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP ANDERSON, AT (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 6 TC 7 Z9 7 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 804 EP 808 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600081 ER PT J AU CHEN, XM PETERSON, PF TOBIN, MT AF CHEN, XM PETERSON, PF TOBIN, MT TI TSUNAMI ANALYSIS OF NATIONAL-IGNITION-FACILITY 2-D GAS-DYNAMICS PHENOMENON SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The tests in the chamber of National Ignition Facility will involve complex multi-dimensional dynamics phenomena. Many safety concerns relate to the ablation of the chamber material and the re-condensation of it. The x-ray induced ablation can vaporize surfaces of internal structures. The deposition of the ablated mass to the laser optics can cause significant damage to the laser optics. This study presents a typical analysis of the ablation from the target positioner in the NIF chamber with the TSUNAMI two-dimensional gas dynamics code. Results reveal that the geometry of target positioner has strong influence to the vapor mass amount and distribution over the chamber wall. The analysis done here shows that it is possible to perform parametric study for different NIF chamber design configurations. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94555. RP CHEN, XM (reprint author), UNIV CALIF BERKELEY,DEPT NUCL ENGN,BERKELEY,CA 94720, USA. NR 7 TC 3 Z9 3 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 814 EP 818 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600083 ER PT J AU MACK, JM BAKER, DA CALDWELL, SE CHRIEN, RE FAILOR, BH GOLDMAN, SR HAUER, AA HOCKADAY, RG OERTEL, JA THORN, WK WATT, RG YOUNG, CS AF MACK, JM BAKER, DA CALDWELL, SE CHRIEN, RE FAILOR, BH GOLDMAN, SR HAUER, AA HOCKADAY, RG OERTEL, JA THORN, WK WATT, RG YOUNG, CS TI LOS-ALAMOS CONTRIBUTION TO TARGET DIAGNOSTICS ON THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The National Ignition Facility (NIF) will have a large suite of sophisticated target diagnostics. This will allow thoroughly diagnosed experiments to be performed both at the ignition and pre-ignition levels. As part of the national effort Los Alamos National Laboratory will design, construct and implement a number of diagnostics for the NIF. This paper describes Los Alamos contributions to the ''phase 1'' diagnostics. Phase 1 represents the most fundamental and basic measurement systems that will form the core for most work on the NIF. The Los Alamos effort falls into four categories: moderate to hard X-ray time-resolved imaging; neutron spectroscopy-primarily with neutron time flight devices; burn diagnostics utilizing gamma ray measurements; and testing measurement concepts (e.g., some soft X-ray ideas) on the TRIDENT laser system at Los Alamos. Because of the large blast, debris and radiation environment, the design of high resolution X-ray imaging systems present significant challenges. Systems with close target proximity require special protection and methods for such protection are described. The system design specifications based on expected target performance parameters are also described. Diagnosis of nuclear yield and burn will be essential to the NIF operation. Nuclear reaction diagnosis utilizing both neutron and gamma ray detection is discussed. The Los Alamos TRIDENT laser system will be used extensively for the development of new measurement concepts and diagnostic instrumentation. Some of its potential roles in the development of diagnostics for NIF are given. RP MACK, JM (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 819 EP 828 PN 2 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600084 ER PT J AU HAGANS, K STATHIS, P WIEDWALD, J CAMPBELL, D AF HAGANS, K STATHIS, P WIEDWALD, J CAMPBELL, D TI TARGET AREA ACQUISITION AND CONTROL-SYSTEM SURVIVABILITY FOR THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The hardening of instruments to survive NIF target emission environments presents a significant challenge. Neutron flux is predicted to be as much as six orders of magnitude greater than the highest achieved neutron flux on NOVA. Not withstanding the high prompt radiation fields, the specifications for the instruments are demanding requiring high resolution imaging and sub nanosecond transient measurements. We present an analysis of the sensitivity of the proposed NIF instrumentation design to EMP, X-rays, gamma rays, and neutrons. Major components assessed include fiber optic cable transport, high bandwidth cable and charge coupled detector (CCD) imaging systems. RP HAGANS, K (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-479,LIVERMORE,CA 94551, USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 829 EP 832 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600085 ER PT J AU VANN, CS BLISS, ES MURRAY, JE AF VANN, CS BLISS, ES MURRAY, JE TI TARGET ALIGNMENT IN THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Accurate placement of hundreds of focused laser beams on target is necessary to achieve success in the National Ignition Facility (NIF). The current system requirement is less than or equal to 7 mu rad error in output pointing and less than or equal to 1 mm error in focusing. To accommodate several system shots per day, a target alignment system must be able to align the target to chamber center, inject an alignment beam to represent each shot beam, and point and focus the alignment beams onto the target in about one hour. At Lawrence Livermore National Laboratory, we have developed a target alignment concept and built a prototype to validate the approach. The concept comprises three systems: the chamber center reference, target alignment sensor, and target alignment beams. RP VANN, CS (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-493,LIVERMORE,CA 94551, USA. NR 1 TC 0 Z9 0 U1 1 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 833 EP 836 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600086 ER PT J AU NG, DS KARPENKO, VP WAVRIK, R AF NG, DS KARPENKO, VP WAVRIK, R TI TARGET AREA STRUCTURAL SUPPORT SYSTEMS-DESIGN TO ACHIEVE THE MICRON-LEVEL STABILITY REQUIREMENT OF THE NATIONAL-IGNITION-FACILITY (NIF) SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The Target Area Structural Support (TASS) systems are designed to provide an optically stable support for the target area systems and personnel access platforms for the 192 laser beam configuration. The conceptual design of the TASS systems was an optimum configuration selected from three designs on which performance studies were conducted. The supporting bases for the design selection were the analytical results, operation, and cost effectiveness. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP NG, DS (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 1 TC 0 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 837 EP 841 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600087 ER PT J AU LATKOWSKI, JF TOBIN, MT SINGH, MS AF LATKOWSKI, JF TOBIN, MT SINGH, MS TI NEUTRONICS AND SHIELDING ANALYSIS OF THE NATIONAL-IGNITION-FACILITY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The Department of Energy (DOE) is proposing to construct the National Ignition Facility (NF) by the year 2001 to embark on a program to achieve ignition and modest gain in the laboratory. The NIF will use 1.8 MJ of 0.35 mu m laser light, nearly a fifty-fold increase in energy over the Nova laser at Lawrence Livermore National Laboratory (LLNL). A 5-m radius spherical aluminum chamber will contain the target experiments and allow access to diagnostics for data collection. Based on a projected maximum annual yield of 385 MJ (1.4 x 10(20) 14 MeV neutrons), prompt annual doses will be < 1.2 mu Sv at the nearest site boundary, < 0.43 mSv immediately outside the Target Area, and < 30 mu Sv in the warroom and control room. The target chamber material has been selected in a trade-off between its mechanical properties and its neutron activation qualities. External target chamber shielding has been selected such that the total annual occupational dose to Target Area workers will be less than or equal to 5 mSv. Finally, some Target Area systems have been redesigned based on their neutron activation and residual dose rates. The operation of the NIF will have an insignificant impact to workers and the general population. RP LATKOWSKI, JF (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-481,LIVERMORE,CA 94550, USA. NR 10 TC 1 Z9 1 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 842 EP 846 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600088 ER PT J AU TOBIN, M LOGAN, G ANDERSON, A DELARUBIA, TD AF TOBIN, M LOGAN, G ANDERSON, A DELARUBIA, TD TI USE OF THE NATIONAL-IGNITION-FACILITY FOR THE DEVELOPMENT OF INERTIAL FUSION ENERGY SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA RP TOBIN, M (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 857 EP 867 PN 2 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600090 ER PT J AU PETZOLDT, RW MOIR, RW AF PETZOLDT, RW MOIR, RW TI TARGET INJECTION METHODS FOR INERTIAL FUSION ENERGY SO FUSION TECHNOLOGY LA English DT Article AB We have studied four methods to inject IFE targets: the gas gun, electrostatic accelerator, induction accelerator, and rail gun. We recommend a gas gun for indirect drive targets because they can support a gas pressure load on one end and can slide along the gun barrel without damage; for other types of targets, a sabot would be necessary. With the gas gun, the amount of gas required for each target (about 10 to 100 mg) is acceptable. We recommend a cam and poppet valve arrangement for gas flow control and barrel venting to improve accuracy and gas pumping. An electrostatic accelerator is attractive for use with lightweight spherical direct drive targets. Since there is no physical contact between the target and the injector, there will be no wear of either component during the injection process. An induction accelerator has an advantage of no electrical contact between the target and the injector. Physical contact is not even necessary, so the wear should be minimal. It requires a cylindrical conductive target sleeve which is a substantial added mass. A rail gun is a simpler device than an electrostatic accelerator or induction accelerator. We recommend an externally applied magnetic field to reduce required current by an order of magnitude. A railgun requires electrical contact between the target and the rails and may have a significant wear rate. The wear in a vacuum could be reduced by use of a solid lubricant such as MoS2. The total required accuracy of target injection, tracking and beam pointing of +/-0.4 mm appears achievable but will require development and experimental verification. RP LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94551 USA. NR 19 TC 3 Z9 3 U1 0 U2 3 PU AMER NUCLEAR SOC PI LA GRANGE PK PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 896 EP 905 PN 2 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600096 ER PT J AU OLSON, RE MAZARAKIS, MG OLSON, CL AF OLSON, RE MAZARAKIS, MG OLSON, CL TI THE LIGHT-ION BEAM APPROACH TO ICF ENERGY-PRODUCTION SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Light ion beam fusion is an approach to electrical power production in which intense beams of low atomic number ions would be used to drive inertial confinement fusion (ICF) targets to ignition and gain, We anticipate that an Engineering Test Facility (ETF) designed to demonstrate moderate yield with a repetition rate would be a major step along the route to an ICF demonstration power plant. In the present paper, we will describe our vision of how ongoing light ion beam and pulsed power research at Sandia National Laboratories (SNL) might be utilized for ETF and eventual inertial fusion energy (IFE) applications. RP OLSON, RE (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 12 TC 4 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 922 EP 925 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600100 ER PT J AU KU, LP JOHNSON, DW LIEW, SL AF KU, LP JOHNSON, DW LIEW, SL TI RADIATION SHIELDING FOR TFTR DT DIAGNOSTICS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB We illustrate the designs of radiation shielding for the TFTR DT diagnostics using the ACX and TVTS systems as specific examples. The main emphasis here is on the radiation transport analyses carried out in support of the designs. Initial results from the DT operation indicate that the diagnostics have been functioning as anticipated and the shielding designs are satisfactory. The experience accumulated in the shielding design for the TFTR DT diagnostics should be useful and applicable to future devices, such as TPX and ITER, where many similar diagnostic systems are expected to be used. RP KU, LP (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 8 TC 1 Z9 1 U1 2 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 933 EP 937 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600102 ER PT J AU SAILOR, WC BARNES, CW WURDEN, GA CHRIEN, RE AF SAILOR, WC BARNES, CW WURDEN, GA CHRIEN, RE TI CONCEPTUAL DESIGN FOR A FAST-NEUTRON IONIZATION-CHAMBER FOR FUSION-REACTOR PLASMA DIAGNOSTICS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB A conceptual design for a radiation-hard ''pointing'' fast neutron ionization chamber that is capable of delivering a 1 MHz countrate of T(D,n) events at ITER is given. The detector will use a similar to 1 cm(3) volume of CO2 fill gas at 0.1 bar pressure in a similar to 500 V/cm electric field. The pulse widths will be similar to 10 ns, enabling it to operate in a flux of similar to 6x10(13) DT n/cm(2)/sec. A special collimator design is used, giving an estimated angular resolution of 4.5 degrees HWHM. RP SAILOR, WC (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Wurden, Glen/A-1921-2017 OI Wurden, Glen/0000-0003-2991-1484 NR 14 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 945 EP 948 PN 2 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600104 ER PT J AU KUGEL, HW ASCIONE, G ELWOOD, S GILBERT, J HWANG, D LEWIS, M LEVINE, J KU, LP RULE, K HAJNAL, F AZZIZ, N GOLDHAGEN, P KLEMIC, G SHEBELL, P AF KUGEL, HW ASCIONE, G ELWOOD, S GILBERT, J HWANG, D LEWIS, M LEVINE, J KU, LP RULE, K HAJNAL, F AZZIZ, N GOLDHAGEN, P KLEMIC, G SHEBELL, P TI TFTR RADIATION CONTOUR AND SHIELDING EFFICIENCY MEASUREMENTS DURING D-D OPERATIONS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB Extensive neutron and gamma radiation contour, shielding efficiency, and spectral measurements were performed during high power TFTR D-D operations at the tokamak Test Cell inner walls, ceiling, roof, and outer walls, in nearby control rooms, work areas, and personnel pathways, outdoors along the site fence at 125 m, and out to the nearest property lines at 180 m. The results confirmed that the efficiency of the basic radiation shielding was sufficient to allow the TFTR D-T experimental plan, and provide empirical guidance for simulating the radiation fields of future fusion reactors. C1 US DOE,ENVIRONM MEASUREMENTS LAB,NEW YORK,NY 10014. RP KUGEL, HW (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 12 TC 5 Z9 5 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 963 EP 970 PN 2 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600107 ER PT J AU HAGRMAN, DL PETTI, DA SMOLIK, GR MCCARTHY, KA AF HAGRMAN, DL PETTI, DA SMOLIK, GR MCCARTHY, KA TI OXIDE AEROSOLS PRODUCED FROM A TUNGSTEN ALLOY FOR FUSION-REACTORS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The mechanisms involved in the formation and transport of aerosols that might be present during possible fusion reactor accidents were investigated. A cascade impactor was used to collect particles formed by oxidation and volatilization of a tungsten alloy containing 1% rhenium, an activation product of tungsten. The alloy was tested at 800, 1000 and 1200 degrees C in flowing air and at 800 degrees C in steam. The quantities, size distributions, and chemical compositions of the particles were determined using a variety of analytical methods. Comparisons were then made with calculations of the vapor release rate, the aerosol nucleation, and the transport of aerosol to the impactor. RP HAGRMAN, DL (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 7 TC 0 Z9 0 U1 1 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 993 EP 997 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600112 ER PT J AU REITZ, TC SMUDA, PA BENAPFL, MA AF REITZ, TC SMUDA, PA BENAPFL, MA TI DESIGN, OPERATION, AND APPLICATION OF THE LLNL PORTABLE TRITIUM PROCESSING SYSTEM SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB A Portable Tritium Processing System (PTPS) has been developed at LLNL that could be applied to fusion energy related tritium processing and decontamination operations. The PTPS has four basic capabilities. These are: oil-free pumping, oil-free gas transfer, gas analysis, and gas phase tritium scrubbing. The design of the PTPS takes into consideration today's stringent release requirements, and utilizes secondary containment throughout the system. Because the system is portable, it can provide complete stand alone tritium processing, and can pass through a typical 36 inch laboratory door, and into confined spaces. This system can easily be moved to different locations within a facility such that the single tritium processing system can provide close-coupled support to multiple operations. Typical setup time for the PTPS is approximately two weeks. The PTPS has been in operation at LLNL for approximately one year. During this time, gram quantities of tritium have been successfully processed through the system. Releases to the stack attributable directly to the PTPS have been less than 0.1 curies, with most of this quantity being a product of maintenance operations. RP REITZ, TC (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-358,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 998 EP 1002 PN 2 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600113 ER PT J AU MINTZ, JM REITZ, TC TOBIN, MT AF MINTZ, JM REITZ, TC TOBIN, MT TI NATIONAL IGNITION FACILITY ENVIRONMENTAL-PROTECTION SYSTEMS SO FUSION TECHNOLOGY LA English DT Article; Proceedings Paper CT 11th Topical Meeting on the Technology of Fusion Energy CY JUN 19-23, 1994 CL NEW ORLEANS, LA AB The conceptual design of Environmental Protection Systems (EPS) for the National Ignition Facility (NIF) is described. These systems encompass tritium and activated debris handling, chamber, debris shield and general decontamination, neutron and gamma monitoring, and radioactive, hazardous and mixed waste handling. Key performance specifications met by EPS designs include limiting the tritium inventory to 300 Ci and total tritium release from NIF facilities to less than 10 Ci/yr. Total radiation doses attributable to NIF shall remain below 10 mrem/yr for any member of the general public and 500 mrem/yr for NIF staff. ALARA-based design features and operational procedures will, in most cases, result in much lower measured exposures. Waste minimization, improved cycle time and reduced exposures all result from the proposed CO2 robotic arm cleaning and decontamination system, while effective tritium control is achieved through a modern system design based on double containment and the proven detritiation technology. RP MINTZ, JM (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 2 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1994 VL 26 IS 3 BP 1003 EP 1008 PN 2 PG 6 WC Nuclear Science & Technology SC Nuclear Science & Technology GA PU756 UT WOS:A1994PU75600114 ER EF