FN Thomson Reuters Web of Science™ VR 1.0 PT J AU KALANTAR, DH KLEM, DE MACGOWAN, BJ MOODY, JD MONTGOMERY, DS MUNRO, DH SHEPARD, TD STONE, GF FAILOR, BH HSING, WW AF KALANTAR, DH KLEM, DE MACGOWAN, BJ MOODY, JD MONTGOMERY, DS MUNRO, DH SHEPARD, TD STONE, GF FAILOR, BH HSING, WW TI PRODUCTION AND CHARACTERIZATION OF LARGE PLASMAS FROM GAS BAG TARGETS ON NOVA SO PHYSICS OF PLASMAS LA English DT Article AB Large plasmas are created by illuminating gas-filled thin-walled balloon-like targets using the Nova laser [E. Campbell et al., Rev. Sci. Instrum. 57, 2101 (1986)]. The targets consist of a 5000-6000 Angstrom skin surrounding 1 atm of neopentane, which, when ionized, becomes a plasma with an electron density of 10(21) electrons/cm(3). X-ray images of the gas bag target are used to evaluate the size and uniformity of the plasma by comparison with LASNEX [R. M. More, J. Quant. Spectrosc. Radiat. Transfer 27, 345 (1982)] simulations. The gas bags are heated with converging and diverging beam spots. The most uniform plasmas are created by illuminating the target with large converging beam spots that overlap to cover most of the surface of the gas bag. The gas bag plasma is heated to a peak temperature of approximately 3.5 keV, with 25 kJ of 3 omega laser light in a 1 ns square pulse. (C) 1995 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. PHYS INT CO, SAN LEANDRO, CA 94577 USA. RP KALANTAR, DH (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. OI Montgomery, David/0000-0002-2355-6242 NR 11 TC 31 Z9 32 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 1995 VL 2 IS 8 BP 3161 EP 3168 DI 10.1063/1.871148 PG 8 WC Physics, Fluids & Plasmas SC Physics GA RM616 UT WOS:A1995RM61600033 ER PT J AU CHANG, CS ZWEBEN, SJ SCHIVELL, J BUDNEY, R SCOTT, S AF CHANG, CS ZWEBEN, SJ SCHIVELL, J BUDNEY, R SCOTT, S TI MODEL FOR COLLISIONAL FAST-ION DIFFUSION INTO TOKAMAK FUSION TEST REACTOR LOSS CONE (VOL 1, PG 3857, 1994) SO PHYSICS OF PLASMAS LA English DT Correction, Addition C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. KOREA ADV INST SCI & TECHNOL,SEOUL,SOUTH KOREA. RP CHANG, CS (reprint author), NYU,COURANT INST MATH SCI,NEW YORK,NY 10012, USA. 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 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD AUG PY 1995 VL 2 IS 8 BP 3237 EP 3237 DI 10.1063/1.871493 PG 1 WC Physics, Fluids & Plasmas SC Physics GA RM616 UT WOS:A1995RM61600041 ER PT J AU NIE, GY LONG, SP GARCIA, RL KIMBALL, BA LAMORTE, RL PINTER, PJ WALL, GW WEBBER, AN AF NIE, GY LONG, SP GARCIA, RL KIMBALL, BA LAMORTE, RL PINTER, PJ WALL, GW WEBBER, AN TI EFFECTS OF FREE-AIR CO2 ENRICHMENT ON THE DEVELOPMENT OF THE PHOTOSYNTHETIC APPARATUS IN WHEAT, AS INDICATED BY CHANGES IN LEAF PROTEINS SO PLANT CELL AND ENVIRONMENT LA English DT Article DE FREE-AIR CO2 ENRICHMENT; LEAF PROTEINS; LHCII; PHOTOSYNTHESIS; RISING ATMOSPHERIC CO2 CONCENTRATION; RUBISCO; SENESCENCE; THYLAKOIDS; WHEAT ID RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE-OXYGENASE; CARBON-DIOXIDE CONCENTRATION; HIGH ATMOSPHERIC CO2; ELEVATED CO2; ACCLIMATION; GROWTH; LEAVES; TEMPERATURES; SENESCENCE; RESPONSES AB A spring wheat crop was grown at ambient and elevated (550 mu mol mol(-1)) CO2 concentrations under free-air CO2 enrichment (FACE) in the field, Four experimental blocks, each comprising 21-m-diameter FACE and control experimental areas, were used, CO2 elevation was maintained day and night from crop emergence to final grain harvest, This experiment provided a unique opportunity to examine the hypothesis that CO2 elevation in the field would lead to acclimatory changes within the photosynthetic apparatus under open field conditions and to assess whether acclimation was affected by crop developmental stage, leaf ontogeny and leaf age, Change in the photosynthetic apparatus was assessed by measuring changes in the composition of total leaf and thylakoid polypeptides separated by SDS-PAGE, For leaves at completion of emergence of the blade, growth at the elevated CO2 concentration had no apparent effect on the amount of any of the major proteins of the photosynthetic apparatus regardless of the leaf examined, Leaf 5 on the main stem was in full sunlight at emergence, but then became shaded progressively as 3-4 further leaves formed above with continued development of the crop, By 35 d following completion of blade emergence, leaf 5 was in shade, At this point, the chlorophyll alb ratio had declined by 26% both in plants grown at the control CO2 concentration and in those grown at the elevated CO2 concentration, which is indicative of shade acclimation. The ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) content declined by 45% in the control leaves, but by 60% in the leaves grown at the elevated CO2 concentration, The light- harvesting complex of photosystem II (LHCII) and the chlorophyll content showed no decrease and no difference between treatments, indicating that the decrease in Rubisco was not an effect of earlier senescence in the leaves at the elevated CO2 concentration. Following completion of the emergence of the flag-leaf blade, the elevated-CO2 treatment inhibited the further accumulation of Rubisco which was apparent in control leaves over the subsequent 14 d, From this point onwards, the flag leaves from both treatments showed a loss of Rubisco, which was far more pronounced in the elevated-CO2 treatment, so that by 36 d the Rubisco content of these leaves was just 70% of that of the controls and by 52 d it was only 20%, At 36 d, there was no decline in chlorophyll, LHCII or the chloroplast ATPase coupling factor (CFI) in the elevated CO2 concentration treatment relative to the control, By 52 d, all of these proteins showed a significant decline relative to the control, This indicates that the decreased concentration of Rubisco at this final stage probably reflected earlier senescence in the elevated-CO2 treatment, but that this was preceded by a CO2-concentration-dependent decline in Rubisco. C1 UNIV ESSEX, DEPT BIOL, COLCHESTER CO4 3SQ, ESSEX, ENGLAND. BROOKHAVEN NATL LAB, DEPT APPL SCI, DIV BIOSYST & PROC SCI, UPTON, NY 11973 USA. USDA ARS, US WATER CONSERVAT LAB, PHOENIX, AZ 85040 USA. ARIZONA STATE UNIV, DEPT BOT, TEMPE, AZ 85287 USA. ARIZONA STATE UNIV, CTR STUDY EARLY EVENTS PHOTOSYNTHESIS, TEMPE, AZ 85287 USA. RI Long, Stephen/A-2488-2008 OI Long, Stephen/0000-0002-8501-7164 NR 43 TC 108 Z9 116 U1 0 U2 15 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0140-7791 EI 1365-3040 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD AUG PY 1995 VL 18 IS 8 BP 855 EP 864 DI 10.1111/j.1365-3040.1995.tb00594.x PG 10 WC Plant Sciences SC Plant Sciences GA RN778 UT WOS:A1995RN77800003 ER PT J AU CATALAN, KJ JACKSON, S ZUBKOWSKI, JD PERRY, DL VALENTE, EJ FELIU, LA POLANCO, A AF CATALAN, KJ JACKSON, S ZUBKOWSKI, JD PERRY, DL VALENTE, EJ FELIU, LA POLANCO, A TI COPPER(II) NITRATE COMPOUNDS WITH HETEROCYCLIC LIGANDS - STRUCTURES OF [CU(NO3)(2,2'-DIPYRIDYL)(2)][NO3]CENTER-DOT-H2O AND [CU(H2O)(1,10-PHENANTHROLINE)(2)][NO3](2) SO POLYHEDRON LA English DT Article ID COMPLEXES; CRYSTAL AB The crystal and molecular structures of [Cu(NO3)(2,2'-dipyridyl)(2)](NO3). H2O (1) and [Cu(H2O)(1,10-phenanthroline)(2)](NO3)(2) (2) have been determined by single crystal X-ray diffraction. The copper cation in 1 displays pseudo-octahedral geometry with ligand nitrogen donors occupying four positions, a coordinated nitrate oxygen a fifth and a nonbonded oxygen a sixth. The copper cation in 2 shows a trigonal bipyramidal geometry with ligand nitrogen donors occupying the axial and two of the equatorial positions, and a coordinated aqua oxygen the other. C1 JACKSON STATE UNIV,DEPT CHEM,JACKSON,MS 39217. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MISSISSIPPI COLL,DEPT CHEM,CLINTON,MS 39056. UNIV METROPOLITANA,DEPT NAT SCI,RIO PIEDRAS,PR 00928. NR 24 TC 38 Z9 38 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD AUG PY 1995 VL 14 IS 15-16 BP 2165 EP 2171 DI 10.1016/0277-5387(95)00011-G PG 7 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA RP953 UT WOS:A1995RP95300022 ER PT J AU ENGELHARDT, U RAPKO, BM DUESLER, EN FRUTOS, D PAINE, RT SMITH, PH AF ENGELHARDT, U RAPKO, BM DUESLER, EN FRUTOS, D PAINE, RT SMITH, PH TI SYNTHESIS AND MOLECULAR-STRUCTURES OF COMPLEXES OF BISMUTH(III) NITRATE WITH TRIDENTATE LIGANDS - 2,6-BIS(-CH2-P(=O)R(2)) SUBSTITUTED PYRIDINE-N-OXIDES SO POLYHEDRON LA English DT Article ID IONS AB The two trifunctional ligands 2,6-(Ph(2)P(=O)-CH2)(2)C5H3NO (1) and 2,6[(EtO)(2)P(=O)-CH2]2C5H3NO (2) were prepared by Arbuzov reactions on 2,6-bis (chloromethyl)pyridine with Ph(2)POMe and triethylphosphite, respectively, and characterized by spectroscopic methods and X-ray structural analysis (1). Their coordination chemistry with Bi(NO,), was studied. The complexes Bi(NO3)(3) . 1 . DMF and Bi (NO3)(3) . 2 were isolated and their X-ray structures determined. In both cases, the ligands bind in a tridentate fashion to Bi-III, and the nitrate ions remain in the inner coordination sphere. Structural features of the unbound and bound ligand 1 are discussed. C1 FREE UNIV BERLIN,INST ANORGAN & ANALYT CHEM,D-14195 BERLIN,GERMANY. UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 11 TC 41 Z9 41 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD AUG PY 1995 VL 14 IS 17-18 BP 2361 EP 2369 DI 10.1016/0277-5387(95)00061-V PG 9 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA RT537 UT WOS:A1995RT53700009 ER PT J AU SIPLEY, JD MENNINGER, JC HARTLEY, KO WARD, DC JACKSON, SP ANDERSON, CW AF SIPLEY, JD MENNINGER, JC HARTLEY, KO WARD, DC JACKSON, SP ANDERSON, CW TI GENE FOR THE CATALYTIC SUBUNIT OF THE HUMAN DNA-ACTIVATED PROTEIN-KINASE MAPS TO THE SITE OF THE XRCC7 GENE ON CHROMOSOME-8 SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE SCID; CHROMOSOME 8Q11; DOUBLE-STRAND BREAK REPAIR; VARIABLE (DIVERSITY) JOINING RECOMBINATION ID RNA POLYMERASE-II; SCID MUTATION; INSITU HYBRIDIZATION; IONIZING-RADIATION; KU-AUTOANTIGEN; HUMAN-CELLS; HUMAN P53; PHOSPHORYLATION; ANTIGEN; BINDING AB The DNA-activated serine/threonine protein kinase (DNA-PK) is composed of a large (approximate to 460 kDa) catalytic polypeptide (DNA-PKcs) and Ku, a heterodimeric DNA-binding component (p70/p80) that targets DNA-PKcs, to DNA. A 41-kbp segment of the DNA-PKcs, gene was isolated, and a 7902-bp segment was sequenced. The sequence contains a polymorphic Pvu II restriction enzyme site, and comparing the sequence with that of the cDNA revealed the positions of nine exons. The DNA-PKcs, gene was mapped to band q11 of chromosome 8 by in situ hybridization. This location is coincident with that of XRCC7, the gene that complements the DNA double-strand break repair and V(D)J recombination defects (where V is variable, D is diversity, and J is joining) of hamster V3 and murine severe combined immunodeficient (scid) cells. C1 BROOKHAVEN NATL LAB,DEPT BIOL 463,UPTON,NY 11973. YALE UNIV,SCH MED,DEPT GENET,NEW HAVEN,CT 06510. WELLCOME CANC RES CAMPAIGN,RES INST,CAMBRIDGE CB2 1QR,ENGLAND. RI Dry, Kate/I-2328-2014 FU NHGRI NIH HHS [HG-00246]; PHS HHS [HF-00272]; Wellcome Trust NR 50 TC 82 Z9 83 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 AUG 1 PY 1995 VL 92 IS 16 BP 7515 EP 7519 DI 10.1073/pnas.92.16.7515 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RM722 UT WOS:A1995RM72200078 PM 7638222 ER PT J AU WILBANKS, TJ AF WILBANKS, TJ TI EMPLOYMENT TRENDS IN GEOGRAPHY - INTRODUCTION SO PROFESSIONAL GEOGRAPHER LA English DT Editorial Material RP WILBANKS, TJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BLACKWELL PUBLISHERS PI CAMBRIDGE PA 238 MAIN STREET, CAMBRIDGE, MA 02142 SN 0033-0124 J9 PROF GEOGR JI Prof. Geogr. PD AUG PY 1995 VL 47 IS 3 BP 315 EP 316 DI 10.1111/j.0033-0124.1995.00315.x PG 2 WC Geography SC Geography GA RP761 UT WOS:A1995RP76100008 ER PT J AU MANCHESTER, JI ORNSTEIN, RL AF MANCHESTER, JI ORNSTEIN, RL TI ENZYME-CATALYZED DEHALOGENATION OF PENTACHLOROETHANE - WHY F87W-CYTOCHROME P450CAM IS FASTER THAN WILD-TYPE SO PROTEIN ENGINEERING LA English DT Article DE CYTOCHROME P450CAM; MOLECULAR DYNAMICS; PROTEIN SIMULATION; PENTACHLOROETHANE; REDUCTIVE DEHALOGENATION ID MOLECULAR-DYNAMICS SIMULATION; ACTIVE-SITE; HALOALKANE DEHALOGENASE; SUBSTRATE MOBILITY; PROTEIN-STRUCTURE; CYTOCHROME-P-450CAM; BINDING; CYTOCHROME-P450CAM; THIOCAMPHOR; MECHANISM AB Under anaerobic conditions, cytochromes P450 can reductively dehalogenate heavily halogenated hydrocarbons, such as one- and two-carbon organic solvents, This catalytic capacity has drawn attention to the potential use of engineered forms of P450s in the remediation of contaminated deep subsurface ecosystems. Loida (1994, PhD Thesis, University of Illinois at Urbana-Champaign, IL) and S.G.Sligar (personal communication) have observed recently that an active-site variant of cytochrome P450cam (F87W) dechlorinates pentachloroethane approximately three times faster than the wild-type enzyme, Molecular dynamics simulations have revealed that the mutant enzyme binding pocket remains smaller, and that pentachloroethane assumes configurations closer to the heme-Fe in the F87W mutant twice as often as in the wild-type enzyme, This result is consistent with a collisional model of dehalogenation, which agrees with experimental observations[li and Wackett (1993) Biochemistry, 32, 9355-9361] that solutions containing wild-type P450cam dehalogenate pentachloroethane 100 times faster than those containing free heme, The simulations suggest that it is unlikely that Trp87 significantly stabilizes the developing negative charge on the substrate during carbon-halogen bond reduction, The design of improved microbial enzymes that incorporate both steric and electronic effects continues for use in remediating halogenated contaminants in situ. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 40 TC 17 Z9 17 U1 1 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0269-2139 J9 PROTEIN ENG JI Protein Eng. PD AUG PY 1995 VL 8 IS 8 BP 801 EP 807 DI 10.1093/protein/8.8.801 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA TH704 UT WOS:A1995TH70400007 PM 8637849 ER PT J AU KEEFE, LJ GINELL, SL WESTBROOK, EM ANDERSON, CW AF KEEFE, LJ GINELL, SL WESTBROOK, EM ANDERSON, CW TI CRYSTALLIZATION AND PRELIMINARY-X-RAY DIFFRACTION STUDIES OF THE HUMAN ADENOVIRUS SEROTYPE-2 PROTEINASE WITH PEPTIDE COFACTOR SO PROTEIN SCIENCE LA English DT Note DE CRYOCRYSTALLOGRAPHY; CRYSTALLIZATION; CYSTEINE PROTEINASE; PROTEINASE COFACTOR COMPLEX; SELENOMETHIONINE; THIOL PROTEINASE; X-RAY CRYSTALLOGRAPHY ID EXPRESSION; DETECTOR; CRYSTALLOGRAPHY; POLYPEPTIDE; SUBSTRATE AB Recombinant human adenovirus serotype 2 proteinase (both native and selenomethionine-substituted) has been crystallized in the presence of the serotype 12, 11-residue peptide cofactor. The crystals (space group P3(1)21 or P3(2)21, one molecule per asymmetric unit, a = b = 41.3 Angstrom, c = 197.0 Angstrom) grew in solutions containing 20-40% 2-methyl-2,4-pentanediol (MPD), 0.1-0.2 M sodium citrate, and 0.1 M sodium HEPES, pH 5.0-7.5. Diffraction data (84% complete to 2.2 Angstrom resolution with R(merge) of 0.0335) have been measured from cryopreserved native enzyme crystals with the Argonne blue (1,024 x 1,024 pixel array) charge-coupled device detector at beamline X8C at the National Synchrotron Light Source (operated by Argonne National Laboratory's Structural Biology Center). Additionally, diffraction data from selenomethionine-substituted proteinase, 65% complete to 2.0 Angstrom resolution with R(merge) values ranging 0.05-0.07, have been collected at three X-ray energies at and near the selenium absorption edge. We have determined three of the six selenium sites and are initiating a structure solution by the method of multiwavelength anomalous diffraction phasing. C1 ARGONNE NATL LAB,CTR MECH BIOL & BIOTECHNOL,ARGONNE,IL 60439. RP KEEFE, LJ (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,POB 5000,UPTON,NY 11973, USA. NR 25 TC 7 Z9 7 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD AUG PY 1995 VL 4 IS 8 BP 1658 EP 1660 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RR832 UT WOS:A1995RR83200026 PM 8520494 ER PT J AU SCHULZEGAHMEN, U BRANDSEN, J JONES, HD MORGAN, DO MEIJER, L VESELY, J KIM, SH AF SCHULZEGAHMEN, U BRANDSEN, J JONES, HD MORGAN, DO MEIJER, L VESELY, J KIM, SH TI MULTIPLE-MODES OF LIGAND RECOGNITION - CRYSTAL-STRUCTURES OF CYCLIN-DEPENDENT PROTEIN-KINASE-2 IN COMPLEX WITH ATP AND 2 INHIBITORS, OLOMOUCINE AND ISOPENTENYLADENINE SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article DE X-RAY CRYSTALLOGRAPHY; PROTEIN KINASE INHIBITORS; CDK INHIBITOR SPECIFICITY; CANCER; DRUG DESIGN ID CATALYTIC SUBUNIT; CDK2 ACTIVITY; BINDING-SITE; PHOSPHORYLATION; ACTIVATION; IDENTIFICATION; VERTEBRATES; REFINEMENT; INVITRO; CANCER AB Cyclin-dependent kinases (CDKs) are conserved regulators of the eukaryotic cell cycle with different isoforms controlling specific phases of the cell cycle. Mitogenic or growth inhibitory signals are mediated, respectively, by activation or inhibition of CDKs which phosphorylate proteins associated with the cell cycle. The central role of CDKs in cell cycle regulation makes them a potential new target for inhibitory molecules with anti-proliferative and/or anti-neoplastic effects. We describe the crystal structures of the complexes of CDK2 with a weakly specific CDK inhibitor, N6-(Delta(2)-isopentenyl)adenine, and a strongly specific inhibitor, olomoucine. Both inhibitors are adenine derivatives and bind in the adenine binding pocket of CDK2, but in an unexpected and different orientation from the adenine of the authentic ligand ATP. The N6-benzyl substituent in olomoucine binds outside the conserved binding pocket and is most likely responsible for its specificity. The structural information from the CDK2-olomoucine complex will be useful in directing the search for the next generation inhibitors with improved properties. (C) 1995 Wiley-Liss, Inc. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF SAN FRANCISCO,DEPT PHYSIOL,SAN FRANCISCO,CA 94143. CNRS,BIOL STN,F-29682 ROSCOFF,FRANCE. UNIV PALACKY,FAC MED,DEPT PATHOPHYSIOL,CR-77515 OLOMOUC,CZECH REPUBLIC. NR 52 TC 246 Z9 249 U1 0 U2 6 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-3585 J9 PROTEINS JI Proteins PD AUG PY 1995 VL 22 IS 4 BP 378 EP 391 DI 10.1002/prot.340220408 PG 14 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA RR115 UT WOS:A1995RR11500007 PM 7479711 ER PT J AU KRON, RG AF KRON, RG TI DIGITAL OPTICAL SKY SURVEYS SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article AB Cameras containing arrays of charge-coupled devices-or which are otherwise capable of sustained high data rates-enable optical sky surveys that compete in efficiency with photographic surveys in terms of-area of sky covered per unit observing time. There are gains in performance as well as efficiency: stellar photometry is more straightforward because of the higher dynamic range of CCDs, and the low noise of CCDs allows narrow-band surveys to be undertaken. The small dead-time between exposures allows surveys for rapid variability as well as near-simultaneous color measurements. The most important new prospect may be real-time analysis for identification of sources changing either in position or in brightness. These gains come only after substantial investment in analysis tools and data handling and storage systems. To illustrate some of this potential, this review will focus on a number of sky surveys with CCDs that are either under way or in advanced implementation stages. RP KRON, RG (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,MS 127,BATAVIA,IL 60510, USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD AUG PY 1995 VL 107 IS 714 BP 766 EP 769 DI 10.1086/133621 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RN590 UT WOS:A1995RN59000009 ER PT J AU SCHWARTZ, SE WARNECK, P AF SCHWARTZ, SE WARNECK, P TI UNITS FOR USE IN ATMOSPHERIC CHEMISTRY SO PURE AND APPLIED CHEMISTRY LA English DT Article AB This document examines the utility and suitability of the International System of Units (Systeme International, SI) as a framework for units in atmospheric chemistry and presents recommendations regarding use of these units in reporting atmospheric chemistry data consistent with the special requirements of this subdiscipline. In general SI is well suited for application to atmospheric chemistry; specifically the wide range of magnitudes that are encountered can be dealt with by the prefixes denoting multiples and submultiples of units, and the application of SI units leads automatically to consistency in unit calculus. The use of special names and symbols for units that are not part of the SI, and are not products of powers of SI base units is discouraged; examples are atmosphere, Dobson unit, hectare. However, continued use of such units (especially the Dobson unit) alongside SI units is advisable for a time until the SI units become more familiar. Local abundances of substances in air may be expressed as mixing ratios or concentrations. Mixing ratio has the advantage of being independent of pressure or temperature, but concentration has advantages for reaction kinetics and material transport. Amount-based units for mixing ratios or concentrations of substances of known chemical composition are preferable to mass-based units. The dimensionless unit mol per mol of air is recommended for mixing ratio of a substance in air, e.g. nmol/mol, rather than the customary parts per billion (ppb). It is necessary to specify whether a mixing ratio refers to dry or moist air. Expressing mixing ratios as ''reduced concentrations'' relative to standard conditions of pressure and temperature leads to ambiguity and should be avoided where possible. Gas-phase concentrations may be expressed on the basis of either mole (mol m(-3)) or molecule (molecule m(-3); SI: m(-3)). The universal use of a single set of units for gas-phase concentration does not seem forthcoming in the immediate future, although the use of mol(-3) affords advantages of consistency and convenience. An extensive table of m recommended symbols and SI units for quantities in atmospheric chemistry is presented. C1 MAX PLANCK INST CHEM,BIOGEOCHEM ABT,D-55020 MAINZ,GERMANY. RP SCHWARTZ, SE (reprint author), BROOKHAVEN NATL LAB,DIV ENVIRONM CHEM,UPTON,NY 11973, USA. RI Schwartz, Stephen/C-2729-2008 OI Schwartz, Stephen/0000-0001-6288-310X NR 17 TC 11 Z9 11 U1 0 U2 3 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 AUG-SEP PY 1995 VL 67 IS 8-9 BP 1377 EP 1406 DI 10.1351/pac199567081377 PG 30 WC Chemistry, Multidisciplinary SC Chemistry GA RP763 UT WOS:A1995RP76300003 ER PT J AU BLAKELY, EA FRY, RJM AF BLAKELY, EA FRY, RJM TI RADIATION PROTECTION IN-SPACE SO RADIATION AND ENVIRONMENTAL BIOPHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Heavy Ion Research - Space, Radiation Protection and Therapy CY MAR 21-24, 1994 CL SOPHIA ANTIPOLIS, FRANCE AB The challenge for planning radiation protection in space is to estimate the risk of events of low probability after low levels of irradiation. This work has revealed many gaps in our knowledge that require further study. Despite investigations of several irradiated populations, the atomic-bomb survivors remain the primary basis for estimating the risk of ionizing radiation. Compared with previous estimates, two new independent evaluations of available information indicate a significantly greater risk of stochastic effects of radiation (cancer and genetic effects) by about a factor of three for radiation workers, including space travelers. This paper presents a brief historical perspective of the international effort to assure radiation protection in space. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37830. RP BLAKELY, EA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 9 TC 8 Z9 8 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0301-634X J9 RADIAT ENVIRON BIOPH JI Radiat. Environ. Biophys. PD AUG PY 1995 VL 34 IS 3 BP 129 EP 131 DI 10.1007/BF01211537 PG 3 WC Biology; Biophysics; Environmental Sciences; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Environmental Sciences & Ecology; Radiology, Nuclear Medicine & Medical Imaging GA RN797 UT WOS:A1995RN79700001 PM 7480625 ER PT J AU SHINN, JL WILSON, JW SCHIMMERLING, W SHAVERS, MR MILLER, J BENTON, EV FRANK, AL BADAVI, FF AF SHINN, JL WILSON, JW SCHIMMERLING, W SHAVERS, MR MILLER, J BENTON, EV FRANK, AL BADAVI, FF TI A GREENS-FUNCTION METHOD FOR HEAVY-ION BEAM TRANSPORT SO RADIATION AND ENVIRONMENTAL BIOPHYSICS LA English DT Article; Proceedings Paper CT International Symposium on Heavy Ion Research - Space, Radiation Protection and Therapy CY MAR 21-24, 1994 CL SOPHIA ANTIPOLIS, FRANCE ID 670A MEV NE-20; FRAGMENTATION; DEPTH; WATER AB The use of Green's function has played a fundamental role in transport calculations for high-charge high-energy (HZE) ions. Two recent developments have greatly advanced the practical aspects of implementation of these methods, The first was the formulation of a closed-form solution as a multiple fragmentation perturbation series, The second was the effective summation of the closed-form solution through nonperturbative techniques, The nonperturbative methods have been recently extended to an inhomogeneous, two-layer transport media to simulate the lead scattering foil present in the Lawrence Berkeley Laboratories (LBL) biomedical beam line used for cancer therapy. Such inhomogeneous codes are necessary for astronaut shielding in space. The transport codes utilize the Langley Research Center atomic and nuclear database. Transport code and database evaluation are performed by comparison with experiments performed at the LBL Bevalac facility using 670 A MeV Ne-20 and 600 A MeV Fe-56 ion beams. The comparison with a time-of-flight and Delta E detector measurement for the Ne-20 beam and the plastic nuclear track detectors for Fe-56 show agreement up to 35%-40% in water and aluminium targets, respectively. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV SAN FRANCISCO,SAN FRANCISCO,CA 94117. CHRISTOPHER NEWPORT UNIV,NEWPORT NEWS,VA 23601. RP SHINN, JL (reprint author), NASA,LANGLEY RES CTR,HAMPTON,VA 23681, USA. NR 13 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0301-634X J9 RADIAT ENVIRON BIOPH JI Radiat. Environ. Biophys. PD AUG PY 1995 VL 34 IS 3 BP 155 EP 159 DI 10.1007/BF01211542 PG 5 WC Biology; Biophysics; Environmental Sciences; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Environmental Sciences & Ecology; Radiology, Nuclear Medicine & Medical Imaging GA RN797 UT WOS:A1995RN79700006 PM 7480630 ER PT J AU HENLE, ES ROOTS, R HOLLEY, WR CHATTERJEE, A AF HENLE, ES ROOTS, R HOLLEY, WR CHATTERJEE, A TI DNA STRAND BREAKAGE IS CORRELATED WITH UNALTERED BASE RELEASE AFTER GAMMA-IRRADIATION SO RADIATION RESEARCH LA English DT Article ID SINGLE-STRAND; AQUEOUS-SOLUTION; SCAVENGER CONCENTRATION; IONIZING-RADIATION; PLASMID DNA; DAMAGE; POLYNUCLEOTIDES; MECHANISMS; EXCITATION; CELLS AB Unaltered base release is correlated with strand breakage for gamma-irradiated bacteriophage PM2 DNA in aqueous solution at pH 7.4. The yield of DNA strand breaks is determined by the agarose gel electrophoresis method. High-performance liquid chromatography (HPLC) is used to assay the release of unaltered nucleic bases. Previously reported HPLC methods have been updated. Unaltered base release is linear with dose up to 424 Gy, where up to 0.2% of all DNA bases are released. No detectable amounts of unaltered nucleosides are released and, besides unaltered bases, only one other product released from DNA is observed. Base release yields do not reflect the PM2 GC content of 43%. Only 76% of all prompt strand breaks appear to be associated with the release of an unaltered free base, whereby the guanine, cytosine, adenine and thymine yields are 9, 27, 18 and 22% of the prompt strand break yield, respectively. Postirradiation incubation at 37 degrees C for 24 h increases the strand break yield 1.38-fold and the unaltered base release yield 1.76-fold such that 97% of the final strand breaks appear to be associated with the release of an unaltered base, whereby the guanine, cytosine, adenine and thymine yields are 10, 36, 23 and 28% of the final strand break yield, respectively. These data indicate that, given proper conditions, nearly every strand break leads to a base release. The bearing of these results on OH radical attack leading to strand breakage and base release is discussed. (C) 1995 by Radiation Research Society C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. RP HENLE, ES (reprint author), UNIV CALIF BERKELEY,DIV BIOCHEM & MOLEC BIOL,BARKER HALL,BERKELEY,CA 94720, USA. NR 40 TC 42 Z9 42 U1 0 U2 4 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 AUG PY 1995 VL 143 IS 2 BP 144 EP 150 DI 10.2307/3579150 PG 7 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA RM594 UT WOS:A1995RM59400002 PM 7631006 ER PT J AU GAYLOR, DW GOLD, LS AF GAYLOR, DW GOLD, LS TI QUICK ESTIMATE OF THE REGULATORY VIRTUALLY SAFE DOSE BASED ON THE MAXIMUM TOLERATED DOSE FOR RODENT BIOASSAYS SO REGULATORY TOXICOLOGY AND PHARMACOLOGY LA English DT Article ID CARCINOGENIC POTENCY DATABASE; NATIONAL-TOXICOLOGY-PROGRAM; ANIMAL BIOASSAYS; CHRONOLOGICAL SUPPLEMENT; RISK AB With a limited subset of National Cancer Institute/National Toxicology Program (NCI/NTP) bioassays, Gaylor (Regul. Toxicol. Pharmacol. 9, 101-108, 1989) showed that the regulatory virtually safe dose (VSD), corresponding to an estimated lifetime cancer risk of less than 10(-6), could be estimated within a factor of 10 simply by dividing the maximum tolerated dose (MTD), estimated from the results of a 90-day study, by 380,000. The purpose of this current study was to extend the analysis to all carcinogens in the Carcinogenic Potency Database (CPDB) utilizing the TD50 (average daily dose rate in mg/kg body wt/day that was estimated to halve the probability of remaining tumor-free at a specified tissue site throughout a a-year study). Using the relationship between the upper bound on the low-dose slope (q(1)*) and the TD50 reported by Krewski et al. (Risk. Anal. 13, 383-398, 1993) and the ratio of the maximum dose tested (Max-D)/TD50 obtained in our present analysis, an estimate of the regulatory VSD was given by the MTD/740,000, for NCI/NTP rodent carcinogens. This was about a factor of two lower than the limited analysis conducted by Gaylor. There was little difference when the chemicals were divided into mutagens and nonmutagens. Ninety-six percent (134 of the 139 NCI/NTP rodent carcinogens) of the regulatory VSDs calculated from the individual TD(50)s obtained from the 2-year bioassays were within a factor of 10 of the MTD/740,000. Gold et al. (Environ. Health Perspect. 79, 259-272, 1989) investigated the distribution of the TD50 among ''near-replicate'' experiments (where the same chemical was tested more than once and was positive in the same strain, sex, and species by the same route). The distribution of TD(50)s from near-replicate experiments is similar to the distribution of the Max-D/TD50. Hence, the estimate of the regulatory VSD based on the Max-D/740,000, for NCI/NTP bioassays, is about as precise as the estimate obtained from a 2-year bioassay. This questions the advisability of conducting a 2-year bioassay for purposes of regulatory risk estimation. Since resources are available to test only a small fraction of chemicals to which humans are exposed, a preliminary estimate of the regulatory VSD can be useful in setting testing priorities. If the expected human exposure level is below the regulatory VSD estimated from the MTD, a chemical may be assigned low priority for testing in a 2-year bioassay. Based on previous work the FDA proposed a ''threshold of regulation'' of a dietary concentration of 0.5 ppb for all substances used in food-contact articles. The results of the present analysis could be used to make the procedure more chemical specific based upon an available MTD. The high correlation between the MTD and estimate of cancer potency (TD50) can be exploited to provide a preliminary, hypothetical upper bound estimate of cancer risk for exposure to a chemical without conducting a 2-year animal bioassay. Thus, the expected level of human exposure relative to the MTD can be used to determine the priority for further research on a chemical, such as mechanistic studies. (C) 1995 Academic Press, Inc. C1 UNIV CALIF BERKELEY, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP US FDA, NATL CTR TOXICOL RES, JEFFERSON, AR 72079 USA. NR 16 TC 35 Z9 35 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0273-2300 EI 1096-0295 J9 REGUL TOXICOL PHARM JI Regul. Toxicol. Pharmacol. PD AUG PY 1995 VL 22 IS 1 BP 57 EP 63 DI 10.1006/rtph.1995.1069 PG 7 WC Medicine, Legal; Pharmacology & Pharmacy; Toxicology SC Legal Medicine; Pharmacology & Pharmacy; Toxicology GA RQ584 UT WOS:A1995RQ58400009 PM 7494904 ER PT J AU PRATT, ST AF PRATT, ST TI EXCITED-STATE MOLECULAR PHOTOIONIZATION DYNAMICS SO REPORTS ON PROGRESS IN PHYSICS LA English DT Review ID ENHANCED MULTIPHOTON IONIZATION; PHOTOELECTRON ANGULAR-DISTRIBUTIONS; ROTATIONAL BRANCHING RATIOS; MULTI-PHOTON IONIZATION; QUANTUM-DEFECT THEORY; HIGH RYDBERG STATES; TRIPLE-RESONANCE SPECTROSCOPY; TIME-RESOLVED PHOTOELECTRON; LASER-INDUCED FLUORESCENCE; OPTICAL DOUBLE-RESONANCE AB This review presents a survey of work using resonance-enhanced multiphoton ionization and double-resonance techniques to study excited-state photoionization dynamics in molecules. These techniques routinely provide detail and precision that are difficult to achieve in single-photon ionization from the ground state. The review not only emphasizes new aspects of photoionization revealed in the excited-state experiments but also shows how the excited-state techniques can provide textbook illustrations of some fundamental mechanisms in molecular photoionization dynamics. Most of the examples are confined to diatomic molecules. RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 237 TC 24 Z9 24 U1 1 U2 11 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0034-4885 EI 1361-6633 J9 REP PROG PHYS JI Rep. Prog. Phys. PD AUG PY 1995 VL 58 IS 8 BP 821 EP 883 DI 10.1088/0034-4885/58/8/001 PG 63 WC Physics, Multidisciplinary SC Physics GA RU285 UT WOS:A1995RU28500001 ER PT J AU JONES, DW DALE, VH BEAUCHAMP, JJ PEDLOWSKI, MA ONEILL, RV AF JONES, DW DALE, VH BEAUCHAMP, JJ PEDLOWSKI, MA ONEILL, RV TI FARMING IN RONDONIA SO RESOURCE AND ENERGY ECONOMICS LA English DT Article DE DEFORESTATION; LAND-USE; AMAZONIA ID ENDOGENOUS ENVIRONMENTAL DEGRADATION; SPECIFICATION TESTS; LAND-USE; CONSERVATION; QUALITY; FIRM AB We study economic and environmental aspects of farming practices of a sample of 91 family farms around the city of Ouro Preto, in Brazil's state of Rondonia, in western Amazonia, from four overlapping perspectives. First, we estimate production functions for six activities on multiproduct farms, finding evidence of increasing returns to scale in cattle activity and possible evidence of nonindependence of profit and utility maximization in several subsistence crops. Second, we examine determinants of overall current farm revenue and wealth, finding possible evidence of overuse of land and underinvestment in cattle, decapitalization of farms over time, overpopulation, and a trade-off between children and capital accumulation. Third, we study interactions between burning strategies, diversification: of farm activities, locational choice, length of tenure on a farm, and soil quality. Longer tenure on a farm and larger area in perennial crops appear to reduce the frequency of burning, while greater area in annual crops increases the frequency. Larger pasture area tends to reduce the frequency of burning below an annual periodicity. Less frequent burning appears to be accompanied by greater diversification of farm income sources. Fourth, we study the determinants of deforestation on lots, finding a negative effect of clearance costs study and productivity of land in cultivation on the clearance of new land. However, the evidence for the relationship between cattle activity and deforestation is mixed: a larger number of cattle increases the absolute amount of land deforested on a lot, but a higher proportion of income from cattle increases the ratio of cultivated land to pasture on a farm. There is also evidence of a trade-off between land quality and the quantity of land deforested. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. VIRGINIA POLYTECH INST & STATE UNIV,DEPT URBAN AFFAIRS & PLANNING,BLACKSBURG,VA 24061. RP JONES, DW (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,OAK RIDGE,TN 37831, USA. NR 53 TC 36 Z9 39 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0928-7655 J9 RESOUR ENERGY ECON JI Resour. Energy Econ. PD AUG PY 1995 VL 17 IS 2 BP 155 EP 188 DI 10.1016/0928-7655(94)00011-8 PG 34 WC Economics; Energy & Fuels; Environmental Sciences; Environmental Studies SC Business & Economics; Energy & Fuels; Environmental Sciences & Ecology GA RR538 UT WOS:A1995RR53800004 ER PT J AU RANDALL, KJ GLUSKIN, E XU, Z AF RANDALL, KJ GLUSKIN, E XU, Z TI SPECTROSCOPY BEAMLINE AT THE ADVANCED PHOTON SOURCE FOR THE PHOTON ENERGY REGION FROM 0.5 TO 3 KEV SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB Interest in the 0.5 to 3 keV, intermediate x-ray, energy region has recently intensified as this spectral region covers, among others, the important L and M edges of transition-metal and rare-earth magnetic materials, respectively. Third-generation synchrotron facilities with their inherent high brightness have the unique potential to cover this energy region with high-resolution, high-flux x-ray beams ideal for spectroscopic studies. A 5.5-cm-period, planar undulator to be installed on the 7-GeV Advanced Photon Source will produce a high brightness source of intermediate-energy x rays. The 0.5- to 3-keV spectroscopy beamline is based on the spherical grating monochromator design that has already been shown to yield high resolution and throughput in the soft-x-ray region, below 1 keV. The beamline has been designed to cover the entire region with a peak resolving power of 6000-10 000. Photon flux at the sample is calculated to be in the range from 10(11) to 10(13) photons/s into a spot size of 1 mm(2). A refocusing mirror will be used to further demagnify the image size at a second experimental station. As a second phase to the spectroscopy program, an elliptically polarized insertion device will be used. The polarization preserving nature of the grazing incidence optical elements in the SGM is crucial to obtain x rays of well-defined polarization. The beamline layout, together with calculations of resolution, throughput, power loading, and high harmonic suppression, will be presented. The photoemission experimental end stations for the spectroscopy station will also be briefly described. (C) 1995 American Institute of Physics. RP RANDALL, KJ (reprint author), ARGONNE NATL LAB,ADV PHOTON SOURCE,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 12 TC 8 Z9 8 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 AUG PY 1995 VL 66 IS 8 BP 4081 EP 4086 DI 10.1063/1.1145352 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA RP408 UT WOS:A1995RP40800011 ER PT J AU BOTKIN, D WEISS, S OGLETREE, DF BEEMAN, J SALMERON, M CHEMLA, DS AF BOTKIN, D WEISS, S OGLETREE, DF BEEMAN, J SALMERON, M CHEMLA, DS TI DESIGN CONSIDERATION IN AN ULTRAFAST SCANNING TUNNELING MICROSCOPE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID SURFACE-DIFFUSION; FORCE MICROSCOPE; TIME; RESOLUTION; PROBE AB We describe an ultrafast scanning tunneling microscope (USTM) with picosecond temporal resolution. We present results of single-point ultrafast tunneling measurements and outline some of the methods and pitfalls in USTM. Ultimately, the technique has the potential to create picosecond scale movies of surface phenomena with atomic spatial resolution. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP BOTKIN, D (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI weiss, shimon/B-4164-2009; Ogletree, D Frank/D-9833-2016 OI weiss, shimon/0000-0002-0720-5426; Ogletree, D Frank/0000-0002-8159-0182 NR 26 TC 9 Z9 10 U1 0 U2 4 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 AUG PY 1995 VL 66 IS 8 BP 4130 EP 4134 DI 10.1063/1.1145359 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA RP408 UT WOS:A1995RP40800018 ER PT J AU COBBLE, JA FERNANDEZ, JC WILDE, BH EVANS, S JIMERSON, J OERTEL, J MONTGOMERY, DS GOMEZ, CC AF COBBLE, JA FERNANDEZ, JC WILDE, BH EVANS, S JIMERSON, J OERTEL, J MONTGOMERY, DS GOMEZ, CC TI SIMULTANEOUS TEMPORAL, SPECTRAL, AND SPATIAL-RESOLUTION OF LASER SCATTER FROM PARAMETRIC PLASMA INSTABILITIES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID STIMULATED RAMAN-SCATTERING AB A spatially discriminating optical streaked spectrograph is employed as a plasma diagnostic on the Nova laser. The instrument, which makes use of a spectrometer coupled to a streak camera with CCD readout, observes a small region of Nova target plasmas with a Cassegrain telescope. It yields simultaneous temporal and spectral information about emission and scattered light from the small plasma region. (C) 1995 American Institute of Physics. RP COBBLE, JA (reprint author), LOS ALAMOS NATL LAB,MS E554,LOS ALAMOS,NM 87545, USA. RI Fernandez, Juan/H-3268-2011; OI Fernandez, Juan/0000-0002-1438-1815; Montgomery, David/0000-0002-2355-6242 NR 13 TC 1 Z9 1 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD AUG PY 1995 VL 66 IS 8 BP 4204 EP 4207 DI 10.1063/1.1145371 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA RP408 UT WOS:A1995RP40800031 ER PT J AU XIE, ZQ LYNEIS, CM AF XIE, ZQ LYNEIS, CM TI 2-FREQUENCY PLASMA-HEATING IN A HIGH CHARGE-STATE ELECTRON-CYCLOTRON-RESONANCE ION SOURCE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ECR AB The performance of the Lawrence Berkeley Laboratory (LBL) advanced electron cyclotron resonance ion source, which is a single stage source designed to operate at 14 GHz alone (single-frequency heating), is enhanced by heating the plasma simultaneously with microwaves of 10 and 14 GHz (two-frequency heating). Production of high charge state ions was increased a factor of 2-5 or higher for the very heavy ions such as bismuth and uranium, as compared to single-frequency heating. Plasma stability was improved and the ion charge state distribution shifted to higher charge state. With two-frequency heating, the source can produce more than 1X10(9) pps of fully stripped argon. High charge state ion beams of bismuth and uranium produced by the source were injected into the 88-Inch Cyclotron at LBL. After acceleration to energies greater than 6 MeV/nucleon, the extracted beam intensities were 1X10(6) pps or higher for Bi-50+,Bi-51+ and U-238(52+,53+). (C) 1995 American Institute of Physics. RP XIE, ZQ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 18 TC 36 Z9 36 U1 0 U2 2 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 AUG PY 1995 VL 66 IS 8 BP 4218 EP 4221 DI 10.1063/1.1145372 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA RP408 UT WOS:A1995RP40800033 ER PT J AU WOSKOV, PP COHN, DR RHEE, DY THOMAS, P TITUS, CH SURMA, JE AF WOSKOV, PP COHN, DR RHEE, DY THOMAS, P TITUS, CH SURMA, JE TI ACTIVE MILLIMETER-WAVE PYROMETER SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB A 135 GHz heterodyne receiver with a rotatable graphite waveguide/mirror system has been implemented on a waste remediation direct-current are furnace for internal surface temperature measurements. The linear temperature measurement range extends from <1 degrees to approximately 15,000 degrees C relative to ambient with a simultaneous capability to monitor surface reflectivity with the local oscillator leakage. Reliable and robust operation on a continuous 24 h basis in a smoky, dirty furnace environment is demonstrated for a total of five furnace runs reaching a maximum temperature of 2200 degrees C. Complete temperature profile measurements with approximately 5 cm spatial resolution clearly documented thermal gradients on the slag melt surface and refractory walls and ceiling for all operating regimes of the furnace. The unique active probing capability of this instrument provided additional real-time information on melt surface turbulence, changing furnace wall emissivity, and millimeter-wave optic losses inside the furnace. (C) 1995 American Institute of Physics. C1 T&R ASSOCIATES, WAYNE, PA 19087 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP WOSKOV, PP (reprint author), MIT, CTR PLASMA FUS, 77 MASSACHUSETTS AVE, CAMBRIDGE, MA 02139 USA. NR 10 TC 7 Z9 7 U1 0 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 AUG PY 1995 VL 66 IS 8 BP 4241 EP 4248 DI 10.1063/1.1145376 PG 8 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA RP408 UT WOS:A1995RP40800037 ER PT J AU LEE, JW HANADA, S YOO, MH AF LEE, JW HANADA, S YOO, MH TI DEFORMATION TWINNING SYSTEMS OF D0(19) STRUCTURED TI-34MOL-PERCENT AL SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID TI3AL C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP LEE, JW (reprint author), TOHOKU UNIV,INST MAT RES,2-1-1 KATAHIRA,SENDAI,MIYAGI 98077,JAPAN. NR 12 TC 15 Z9 15 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 AUG 1 PY 1995 VL 33 IS 3 BP 509 EP 514 DI 10.1016/0956-716X(95)00260-3 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA RK597 UT WOS:A1995RK59700026 ER PT J AU ROMERO, LA AF ROMERO, LA TI LOW OR HIGH PECLET NUMBER FLOW PAST A PROLATE SPHEROID IN A SATURATED POROUS-MEDIUM SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE POROUS MEDIA; FREE CONVECTION; SPHEROID AB We present solutions for the temperature field caused by the flow past a heated spheroid in a saturated porous medium. We consider both the case where the spheroid is held at a constant temperature, and where the Aux at all points on the spheroid is held constant. Asymptotic solutions are computed for the limits of high and low Peclet number flow and compared to results from numerical calculations. RP ROMERO, LA (reprint author), SANDIA NATL LABS,DIV APPL & NUMER MATH,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 10 TC 5 Z9 5 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER PH#382-9800, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD AUG PY 1995 VL 55 IS 4 BP 952 EP 974 DI 10.1137/S0036139993250063 PG 23 WC Mathematics, Applied SC Mathematics GA RM963 UT WOS:A1995RM96300005 ER PT J AU ROMERO, LA AF ROMERO, LA TI FORCED-CONVECTION PAST A SLENDER BODY IN A SATURATED POROUS-MEDIUM SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE POROUS MEDIA; FREE CONVECTION; SLENDER BODY AB We present solutions for the temperature field due to Darcy flow past a slender body with a prescribed flux distribution embedded in a saturated porous medium. The results of the analysis are compared to both a perturbation analysis of low Peclet number flow past a prolate spheroid and to direct numerical simulations of the same problem. The slender body approximation is found to be in excellent agreement with these results. RP ROMERO, LA (reprint author), SANDIA NATL LABS,DIV APPL & NUMER MATH,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 5 TC 6 Z9 6 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER PH#382-9800, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD AUG PY 1995 VL 55 IS 4 BP 975 EP 985 DI 10.1137/S003613999325155X PG 11 WC Mathematics, Applied SC Mathematics GA RM963 UT WOS:A1995RM96300006 ER PT J AU KLEMM, RA AF KLEMM, RA TI MODELS OF VORTICES LN ANISOTROPIC SUPERCONDUCTORS SO SIAM JOURNAL ON APPLIED MATHEMATICS LA English DT Article DE SUPERCONDUCTIVITY; ANISOTROPIC; VORTICES; GINZBURG-LANDAU; LAWRENCE-DONIACH; LONDON; TORQUE; LOWER CRITICAL FIELD ID LOWER CRITICAL-FIELD; II SUPERCONDUCTOR; LAYERED SUPERCONDUCTORS; MAGNETIC-PROPERTIES; VORTEX AB The line energy of a single magnetic vortex at an arbitrary direction in an anisotropic superconductor is evaluated in three different phenomenological models, the anisotropic London model, the anisotropic Ginzburg-Landau model, and the Lawrence-Doniach model. The vortex line energy in the anisotropic London model can be solved by Fourier transformation, but the core cutoff is not present in the model. Using the Klemm-Clem transformations of the free energy and vortex coordinates in the anisotropic Ginzburg-Landau model, a theorem relating the shape of the effective core cross-section in the anisotropic London model to that in the anisotropic Ginzburg-Landau model is presented. This theorem allows the anisotropic London model to be used in the entire regime H-c1 less than or equal to H much less than H-c2, regardless of the anisotropy and field direction. The resulting lower critical field H-c1(theta(H)) can exhibit a discontinuity, a kink, or be monotonic in its angular dependence. In addition, the transformations are applied to the case of a core cross-section of a single Vortex in the Lawrence-Doniach model, and the angular dependence of the magnetic torque is calculated. The torque exhibits the expected dimensional crossover, having an angular dependence which reduces to that for an anisotropic Ginzburg-Landau superconductor very near to T-c, and to that for a lattice of coupled, parallel Josephson junctions well below the dimensional crossover temperature T*. In the vicinity of T*, however, dramatic oscillations in the angular dependence of the torque are predicted. RP KLEMM, RA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 2 Z9 2 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER PH#382-9800, PHILADELPHIA, PA 19104-2688 SN 0036-1399 J9 SIAM J APPL MATH JI SIAM J. Appl. Math. PD AUG PY 1995 VL 55 IS 4 BP 986 EP 1015 DI 10.1137/S0036139994263860 PG 30 WC Mathematics, Applied SC Mathematics GA RM963 UT WOS:A1995RM96300007 ER PT J AU NOZIK, AJ AF NOZIK, AJ TI COMMENT ON THERMODYNAMIC ASPECTS OF PHOTOCHEMICAL SOLAR-ENERGY CONVERSION SO SOLAR ENERGY MATERIALS AND SOLAR CELLS LA English DT Article; Proceedings Paper CT 10th International Conference on Photochemical Transformation and Storage of Solar Energy (IPS-10) CY 1994 CL INTERLAKEN, SWITZERLAND ID QUANTUM-WELLS; CARRIER; RELAXATION; GAAS; BULK AB Two of the major issues discussed at the workshop on thermodynamics of photochemical solar energy conversion are summarized here: (1) the effect of hot carrier processes on the thermodynamics of solar photon conversion; (2) the existence of a light-intensity threshold for photoconversion processes and the validity of quasi-Fermi levels. RP NOZIK, AJ (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 10 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0248 J9 SOL ENERG MAT SOL C JI Sol. Energy Mater. Sol. Cells PD AUG PY 1995 VL 38 IS 1-4 BP 73 EP 74 DI 10.1016/0927-0248(94)00216-9 PG 2 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA RR227 UT WOS:A1995RR22700009 ER PT J AU WASIELEWSKI, MR WIEDERRECHT, GP SVEC, WA NIEMCZYK, MP AF WASIELEWSKI, MR WIEDERRECHT, GP SVEC, WA NIEMCZYK, MP TI CHLORIN-BASED SUPRAMOLECULAR ASSEMBLIES FOR ARTIFICIAL PHOTOSYNTHESIS SO SOLAR ENERGY MATERIALS AND SOLAR CELLS LA English DT Article; Proceedings Paper CT 10th International Conference on Photochemical Transformation and Storage of Solar Energy (IPS-10) CY 1994 CL INTERLAKEN, SWITZERLAND ID PHOTOCHEMICAL ELECTRON-TRANSFER; COVALENTLY LINKED PORPHYRIN; TIME-RESOLVED EPR; RADICAL PAIRS; SPIN POLARIZATION; REACTION CENTERS; MODEL SYSTEM; QUINONE; TEMPERATURE; PICOSECOND AB Photosynthetic reaction center models consisting of zinc 9-desoxo-pyrochlorophyllide a primary electron donors, ZC, that are directly bonded at their 3-position to the 5-position of a 2,8,12,18-tetraethyl-3,7,13,17-tetramethylporphyrin, ZP, which is in turn bonded at its 15-position to 2-triptycenenaphthoquinone, 2-triptycenebenzoquinone, 1-triptycenebenzoquinone, or N-(4-phenyl),N'-(n-octyl)-1,4,5,8-naphthalenediimide, 1, 2, 3, and 4, respectively, were prepared. Steric hindrance between adjacent substituents positions the pi system of the chlorophyll perpendicular to that of the porphyrin. In turn, the pi system of the chlorophyll is held about 60 degrees to that of the O-O axis of the quinones in 1 and 2, parallel to the quinone O-O axis in 3, and parallel to the N-N axis in the diimide acceptor in 4. The resulting structures place the ZC donors in 1, 2, 3 and 4 at fixed center-to-center distances of 20, 18, 14, and 21 Angstrom from the accepters, respectively. Photoexcitation of 1-4 in 2-methyltetrahydrofuran glass at 77K results in a single observable electron transfer reaction: (1*)ZC-ZP-X --> ZC(+)-ZP-X(-), where X = benzoquinone (BQ), naphthoquinone (NQ) or naphthalenediimide (NI), that occurs with tau = 4.5, 3.3, 2.0, and 2.0 ps for 1, 2, 3, and 4, respectively. The final ZC(+)-ZP-X(-) radical pairs live for 12.7, 8.4, 2.5, and 10 ms at 77K in 1, 2, 3, and 4, respectively, and exhibit spin-polarized EPR spectra characteristic of spin-correlated radical pairs. The EPR spectra of 1-4 can be simulated using the distances and orientations of the radicals relative to one another determined from the molecular structures of 1-4. These long-lived, spin-polarized radical ion pairs closely mimic the bacteriochlorophyll cation - quinone anion radical pair produced in photosynthetic reaction centers and provide a useful tool for studying the interaction of the surrounding medium with the charge separated radical ion pair. RP WASIELEWSKI, MR (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 25 TC 30 Z9 30 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0248 J9 SOL ENERG MAT SOL C JI Sol. Energy Mater. Sol. Cells PD AUG PY 1995 VL 38 IS 1-4 BP 127 EP 134 DI 10.1016/0927-0248(94)00221-5 PG 8 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA RR227 UT WOS:A1995RR22700014 ER PT J AU BIGNOZZI, CA ARGAZZI, R SCHOONOVER, JR MEYER, GJ SCANDOLA, F AF BIGNOZZI, CA ARGAZZI, R SCHOONOVER, JR MEYER, GJ SCANDOLA, F TI PHOTOSENSITIZATION OF WIDE BANDGAP SEMICONDUCTORS WITH ANTENNA MOLECULES SO SOLAR ENERGY MATERIALS AND SOLAR CELLS LA English DT Article; Proceedings Paper CT 10th International Conference on Photochemical Transformation and Storage of Solar Energy (IPS-10) CY 1994 CL INTERLAKEN, SWITZERLAND ID POLYNUCLEAR COMPLEXES; TITANIUM-DIOXIDE; ENERGY-TRANSFER; SENSITIZATION; CONVERSION; LIGHT; FILMS AB Polynuclear metal complexes, supporting efficient intramolecular energy transfer processes, can be used to increase the light harvesting efficiency of sensitized wide bandgap semiconductors. Experimental studies are discussed to emphasize: (i) how structural changes at the molecular level may affect the performances of photoelectrochemical cells based on antenna-sensitizer molecular assemblies, (ii) the availability of fast time-resolved resonance Raman and infrared spectroscopies for monitoring intercomponent energy transfer processes, and (iii) the possibility to design extended antenna units acting as molecular conduits for long-range energy transfer. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. JOHNS HOPKINS UNIV, DEPT CHEM, BALTIMORE, MD 21218 USA. RP BIGNOZZI, CA (reprint author), UNIV FERRARA, DEPT CHEM, I-44100 FERRARA, ITALY. RI Argazzi, Roberto/C-4819-2015; OI Argazzi, Roberto/0000-0002-2619-6860; Bignozzi, Carlo Alberto/0000-0002-7882-3694 NR 18 TC 44 Z9 46 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0248 EI 1879-3398 J9 SOL ENERG MAT SOL C JI Sol. Energy Mater. Sol. Cells PD AUG PY 1995 VL 38 IS 1-4 BP 187 EP 198 DI 10.1016/0927-0248(94)00225-8 PG 12 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA RR227 UT WOS:A1995RR22700019 ER PT J AU NOZIK, AJ AF NOZIK, AJ TI ELECTRON-TRANSFER DYNAMICS SO SOLAR ENERGY MATERIALS AND SOLAR CELLS LA English DT Article; Proceedings Paper CT 10th International Conference on Photochemical Transformation and Storage of Solar Energy (IPS-10) CY 1994 CL INTERLAKEN, SWITZERLAND ID SEMICONDUCTOR LIQUID INTERFACES; HOT CARRIER INJECTION; QUANTUM-WELLS; RELAXATION; JUNCTIONS; GAAS; BULK RP NOZIK, AJ (reprint author), NREL,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 21 TC 2 Z9 2 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0248 J9 SOL ENERG MAT SOL C JI Sol. Energy Mater. Sol. Cells PD AUG PY 1995 VL 38 IS 1-4 BP 327 EP 329 DI 10.1016/0927-0248(95)00007-0 PG 3 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA RR227 UT WOS:A1995RR22700028 ER PT J AU GOSLING, JT HUNDHAUSEN, AJ AF GOSLING, JT HUNDHAUSEN, AJ TI ON THE SOLAR-FLARE MYTH POSTULATED BY GOSLING - REPLY SO SOLAR PHYSICS LA English DT Letter C1 NATL CTR ATMOSPHER RES,HIGH ALTITUDE OBSERV,BOULDER,CO 80307. RP GOSLING, JT (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87544, USA. NR 6 TC 15 Z9 15 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0038-0938 J9 SOL PHYS JI Sol. Phys. PD AUG PY 1995 VL 160 IS 1 BP 57 EP 60 DI 10.1007/BF00679094 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RV349 UT WOS:A1995RV34900006 ER PT J AU VANDOREN, VE VANCAMP, PE STRAUB, G AF VANDOREN, VE VANCAMP, PE STRAUB, G TI CONSTRAINTS ON DENSITY FUNCTIONALS IMPOSED BY THE STABILITY CONDITIONS OF AN INHOMOGENEOUS SYSTEM OF CHARGED-PARTICLES SO SOLID STATE COMMUNICATIONS LA English DT Article DE METALS; SEMICONDUCTORS; ELECTRONIC BAND STRUCTURE; DIELECTRIC RESPONSE ID DIELECTRIC FUNCTION; ELECTRON-GAS; EXCHANGE; ATOMS; SIGN AB The stability conditions of an inhomogeneous system of charged particles imposes constraints not only on the dielectric function but also on the exchange correlation contribution to the dielectric function and therefore on the density functional. For a polarizability given by the Lindhard or the Penn model, any local density approximation, e.g. Kohn-Sham exchange and Ceperley-Alder correlation, violates the stability constraint for k(F)-values smaller than a maximum value. At least one microscopic calculation of the dielectric function also violates the stability criterion for small k(F)-values. This violation does not occur for non-local density functionals with an exponentially or Gaussian-screened Coulomb interaction. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP UNIV ANTWERP, RUCA, DEPT PHYS, GROENENBORGERLAAN 171, B-2020 ANTWERP, BELGIUM. NR 19 TC 0 Z9 0 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0038-1098 EI 1879-2766 J9 SOLID STATE COMMUN JI Solid State Commun. PD AUG PY 1995 VL 95 IS 5 BP 323 EP 327 DI 10.1016/0038-1098(95)00245-6 PG 5 WC Physics, Condensed Matter SC Physics GA RE086 UT WOS:A1995RE08600011 ER PT J AU Ibok, E Garg, S Li, GG Forouhi, AR Bloomer, I Ager, J AF Ibok, E Garg, S Li, GG Forouhi, AR Bloomer, I Ager, J TI Optical characterization of amorphous and polycrystalline silicon films SO SOLID STATE TECHNOLOGY LA English DT Article C1 N&K TECHNOL,SANTA CLARA,CA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP Ibok, E (reprint author), ADV MICRO DEVICES INC,AUSTIN,TX, USA. NR 6 TC 0 Z9 0 U1 0 U2 1 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 AUG PY 1995 SU S BP S11 EP & PG 4 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA TN988 UT WOS:A1995TN98800002 ER PT J AU BARTOS, I JAROS, P BARBIERI, A VANHOVE, MA CHUNG, WF CAI, Q ALTMAN, MS AF BARTOS, I JAROS, P BARBIERI, A VANHOVE, MA CHUNG, WF CAI, Q ALTMAN, MS TI CU(111) SURFACE RELAXATION BY VLEED SO SURFACE REVIEW AND LETTERS LA English DT Article ID ELECTRON REFLECTION AB Very-low-energy electron diffraction (VLEED) intensities from a clean Cu(111) surface have been measured in detail in the energy range 15-100 eV by low-energy electron microscope (LEEM). This enabled the elimination of possible disturbances due to stray magnetic fields. Corresponding theoretical I-V curves have been obtained in good agreement with experimental data when an image-type surface barrier and anisotropy of the electron attenuation were taken into account. The reliability factor analysis indicates a slight expansion of the topmost interatomic spacing of Cu(111) relative to its bulk value. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,KOWLOON,HONG KONG. FUDAN UNIV,DEPT PHYS,SHANGHAI 200433,PEOPLES R CHINA. RP BARTOS, I (reprint author), ACAD SCI CZECH REPUBL,INST PHYS,PRAGUE,CZECH REPUBLIC. RI Van Hove, Michel/A-9862-2008; Bartos, Igor/G-5780-2014 OI Van Hove, Michel/0000-0002-8898-6921; NR 23 TC 27 Z9 27 U1 0 U2 7 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-625X J9 SURF REV LETT JI Surf. Rev. Lett. PD AUG PY 1995 VL 2 IS 4 BP 477 EP 482 DI 10.1142/S0218625X95000431 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RV652 UT WOS:A1995RV65200006 ER PT J AU KUHN, M RODRIGUEZ, JA AF KUHN, M RODRIGUEZ, JA TI COADSORPTION OF ZN AND S ON MO(110) - WEAKENING OF THE ZN-MO BOND AND ZN-PROMOTED SULFIDATION OF MO SO SURFACE SCIENCE LA English DT Article DE CATALYSIS; MOLYBDENUM; SULFIDES; SURFACE CHEMICAL REACTION; THERMAL DESORPTION SPECTROSCOPY; X-RAY PHOTOELECTRON SPECTROSCOPY; ZINC ID BIMETALLIC SURFACES; SULFUR; ADSORPTION; RU(001); STATES; ZINC AB The coadsorption of Zn and S on Mo(110) has been investigated using TDS, XPS and XAES. Zn atoms supported on clean Mo(110) desorb at 670 (first layer), 510 (second layer) and 480 K (multilayer). The Mo-Zn bond is considerably stronger (similar to 10 kcal/mol) than the Zn-Zn bond. The strong Mo <--> Zn interaction leads to shifts of similar to 0.35 eV toward lower binding energy in the Zn 3d and 2p levels, and in the ZnL(3)M(45)M(45) Auger transition. At submonolayer coverages (theta(S) + theta(Zn) < 1 ML), Zn and S adatoms do not react to form zinc sulfides on top of Mo(110). The Zn and S adatoms compete for making bonds with the Mo(110) substrate. This competition produces a significant (5-10 kcal/mol) weakening in the strength of the Mo-Zn bond. Surfaces with submonolayer coverages of Zn and S show desorption of Zn at temperatures between 450 and 650 K, with S still remaining on the surfaces at 1200 K. The exposure of Zn/Mo(110) surfaces to large amounts of S-2 gas (theta(S) > 1 ML) at 300 K produces zinc sulfides and chemisorbed sulfur, without forming molybdenum sulfides. At 600-700 K, zinc promotes the formation of molybdenum sulfides by favoring the migration of sulfur from the surface into the lattice of the Mo substrate. In the ZnxS/MoyS/Mo(110) systems, the zinc sulfides decompose from 750-950 K, whereas the molybdenum sulfides dissociate at much higher temperatures (1200-1350 K). C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 39 TC 26 Z9 26 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 AUG 1 PY 1995 VL 336 IS 1-2 BP 1 EP 12 DI 10.1016/0039-6028(95)00497-1 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RM715 UT WOS:A1995RM71500005 ER PT J AU WU, YT TAO, HS GARFUNKEL, E MADEY, TE SHINN, ND AF WU, YT TAO, HS GARFUNKEL, E MADEY, TE SHINN, ND TI GROWTH, INTERFACIAL ALLOYING, AND OXIDATION OF ULTRA-THIN AL FILMS ON RU(0001) SO SURFACE SCIENCE LA English DT Article DE ALUMINUM; ALUMINUM OXIDE; CERAMIC THIN FILMS; LOW ENERGY ION SCATTERING (LEIS); RUTHENIUM; X-RAY PHOTOELECTRON SPECTROSCOPY (XPS) ID RAY PHOTOELECTRON-SPECTROSCOPY; LOW-ENERGY HE+; ALUMINUM-OXIDE OVERLAYER; VIBRATIONAL PROPERTIES; ELECTRONIC-STRUCTURE; DIFFUSION-BARRIERS; THERMAL-DESORPTION; SOLID-SURFACES; INITIAL-STAGES; NI3AL ALLOY AB The growth and oxidation of ultra-thin aluminum films on Ru(0001) have been studied by low energy ion scattering (LEIS) and X-ray photoelectron spectroscopy (XPS) using both Mg K alpha and synchrotron soft X-ray radiation. For Al films of average thickness similar to 15 Angstrom deposited at 300 K, LEIS demonstrates that the Ru substrate is completely covered. Upon annealing to similar to 1000 K LEIS shows the reappearance of Ru at the surface. At the same time, the metallic Al2p peak shifts to lower binding energy and a low binding energy shoulder appears on the Ru3d peak, suggesting Al/Ru interfacial alloying. Annealing Al films to similar to 1000 K in 1 X 10(-4) Torr oxygen produces an oxidized surface layer that completely covers the Ru substrate; the resultant aluminum oxide films are stoichiometric. C1 RUTGERS STATE UNIV,DEPT CHEM,PISCATAWAY,NJ 08855. RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08855. RUTGERS STATE UNIV,SURFACE MODIFICAT LAB,PISCATAWAY,NJ 08855. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 62 TC 39 Z9 39 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 1 PY 1995 VL 336 IS 1-2 BP 123 EP 139 DI 10.1016/0039-6028(95)00494-7 PG 17 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RM715 UT WOS:A1995RM71500017 ER PT J AU CHEN, CL TSONG, TT AF CHEN, CL TSONG, TT TI ATOMIC ROUGHNESS OF STEPS OF IR(001) LAYERS SO SURFACE SCIENCE LA English DT Letter DE FIELD EVAPORATION; FIELD ION MICROSCOPY; IRIDIUM; SURFACE DIFFUSION; SURFACE ROUGHENING; SURFACE STRUCTURE, MORPHOLOGY, ROUGHNESS, AND TOPOGRAPHY ID TUNNELING-MICROSCOPY; SURFACE-DIFFUSION; ACTIVATION-ENERGY; SI(001); DYNAMICS; BEHAVIOR AB With the field ion microscope, we have studied the energetics of atomic processes on the Ir(001) surface. We have found that lattice step atoms start to move along the [110] steps around 400 K. In thermal equilibrium, the top surface layer becomes a square with its four sides parallel to the [110] directions. At higher temperatures (500 K or higher), step atoms start to dissociate from edge sites, kink sites, ledge sites and other sites randomly so that one-dimensional step roughening occurs. By measuring the mean square deviation of the step heights at various temperatures, the kink energy for the Ir(001) steps can be derived to be 1.36 eV. C1 ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN. RP CHEN, CL (reprint author), LOS ALAMOS NATL LAB,CMS,MS K765,LOS ALAMOS,NM 87545, USA. NR 24 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 AUG 1 PY 1995 VL 336 IS 1-2 BP L735 EP L740 DI 10.1016/0039-6028(95)00562-5 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RM715 UT WOS:A1995RM71500001 ER PT J AU TARTER, CB AF TARTER, CB TI NASA THINKS SMALL SO TECHNOLOGY REVIEW LA English DT Letter RP TARTER, CB (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MASS INST TECHNOL PI CAMBRIDGE PA CAMBRIDGE, MA 02139 SN 0040-1692 J9 TECHNOL REV JI Technol. Rev. PD AUG-SEP PY 1995 VL 98 IS 6 BP 6 EP 6 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RL926 UT WOS:A1995RL92600004 ER PT J AU HIRST, E AF HIRST, E TI ENERGY EFFICIENCY SO TECHNOLOGY REVIEW LA English DT Letter RP HIRST, E (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MASS INST TECHNOL PI CAMBRIDGE PA CAMBRIDGE, MA 02139 SN 0040-1692 J9 TECHNOL REV JI Technol. Rev. PD AUG-SEP PY 1995 VL 98 IS 6 BP 8 EP 8 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RL926 UT WOS:A1995RL92600008 ER PT J AU MORRIS, MD SOLOMON, AD AF MORRIS, MD SOLOMON, AD TI DESIGN AND ANALYSIS FOR AN INVERSE PROBLEM ARISING FROM AN ADVECTION-DISPERSION PROCESS SO TECHNOMETRICS LA English DT Article DE COMPUTATIONAL EXPERIMENT; EXPERIMENTAL DESIGN; GROUNDWATER TRANSPORT; PARTIAL DIFFERENTIAL EQUATION; RANDOM FUNCTION; STOCHASTIC PROCESS ID COMPUTER EXPERIMENTS AB We consider a process of one-dimensional fluid flow through a soil-packed tube in which a contaminant is initially distributed. The contaminant concentration, as a function of location in the tube and time after Bushing begins, is classically modeled as the solution of a linear second-order partial differential equation. Here, we consider the related issues of how contaminant concentration measured at some location-time combinations can be used to approximate concentration at other locations and times and how the sampled location-time combinations can be most effectively selected for this purpose (i.e., experimental design). The method is demonstrated for the case in which initial concentrations are approximated based on data collected only at the downstream end of the tube. Finally, the effect of misspecifying one of the model parameters is discussed, and alternative designs are developed for instances in which that parameter must be estimated from the data. RP MORRIS, MD (reprint author), OAK RIDGE NATL LAB,DIV CSM,MATH SCI SECT,OAK RIDGE,TN 37831, USA. NR 12 TC 4 Z9 4 U1 1 U2 2 PU AMER STATIST ASSN PI ALEXANDRIA PA 1429 DUKE ST, ALEXANDRIA, VA 22314 SN 0040-1706 J9 TECHNOMETRICS JI Technometrics PD AUG PY 1995 VL 37 IS 3 BP 293 EP 302 DI 10.2307/1269913 PG 10 WC Statistics & Probability SC Mathematics GA RK826 UT WOS:A1995RK82600009 ER PT J AU JACOBSON, CE DAWSON, MR AF JACOBSON, CE DAWSON, MR TI STRUCTURAL AND METAMORPHIC EVOLUTION OF THE OROCOPIA SCHIST AND RELATED ROCKS, SOUTHERN CALIFORNIA - EVIDENCE FOR LATE MOVEMENT ON THE OROCOPIA FAULT SO TECTONICS LA English DT Article ID SAN-GABRIEL MOUNTAINS; PELONA SCHIST; NORTHEASTWARD MOVEMENT; VINCENT THRUST; MAFIC SCHIST; SHEAR ZONES; SUBDUCTION; PRESSURE; VERMONT; HISTORY AB The Pelona, Orocopia, and Rand Schists (FOR schists) of southern California and southwesternmost Arizona are late Mesozoic or early Tertiary subduction complexes that underlie Precambrian to Mesozoic continental basement along the low-angle Vincent-Chocolate Mountains (VCM) fault system. The VCM faults are often considered to be remnants of the original subduction zone, but recent work indicates that many have undergone substantial postsubduction reactivation. In the Orocopia Mountains, for example, the Orocopia Schist exhibits an exceptionally complex structural and metamorphic history due to multiple periods of movement along the Orocopia fault. Structures in the schist include isoclinal folds with axial-planar schistosity, open-to-tight folds that fold schistosity, penetrative stretching lineations, and crenulation lineations, all of which show a nearly 360 degrees range in trend. Folds and lineations that trend approximately NE-SW occur throughout the schist and are thought to be part of an early phase of deformation related to subduction. Folds of this orientation show no consistent vergence. Folds and lineations that trend approximately NW-SE are concentrated near the Orocopia fault and are interpreted to have formed during exhumation of the schist. The NW-SE trending folds, and shear indicators in late-stage mylonite at the top of the schist, consistently verge NE. The exhumation event culminated in emplacement of the schist against brittlely deformed upper plate. Exhumation of the Orocopia Schist was accompanied by retrograde replacement of garnet, biotite, epidote, and calcic amphibole by chlorite, calcite, and sericite. Matrix amphibole has a lower Na/Al ratio than amphibole inclusions in albite, consistent with a late-stage decrease in pressure. As NE vergence in the Orocopia Mountains is associated with exhumation of the schist, the NE movement along other segments of the VCM fault may also be late and therefore have no bearing on the facing direction of the VCM subduction zone, contrary to past interpretations. C1 AMES LAB,AMES,IA. RP JACOBSON, CE (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT GEOL & ATMOSPHER SCI,AMES,IA 50011, USA. NR 54 TC 10 Z9 10 U1 3 U2 7 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0278-7407 J9 TECTONICS JI Tectonics PD AUG PY 1995 VL 14 IS 4 BP 933 EP 944 DI 10.1029/95TC01446 PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA RN833 UT WOS:A1995RN83300013 ER PT J AU COBO, JM VALDEZ, JG GURLEY, LR AF COBO, JM VALDEZ, JG GURLEY, LR TI INHIBITION OF MITOTIC-SPECIFIC HISTONE PHOSPHORYLATION BY SODIUM ARSENITE SO TOXICOLOGY IN VITRO LA English DT Article; Proceedings Paper CT 8th International Workshop on In Vitro Toxicology (INVITOX 94) CY SEP 20-23, 1994 CL KARTAUSE ITTINGEN, SWITZERLAND SP ECVAM, Ispra, Italy, Procter & Gamble, Hlth & Beauty Care, Europe, ERGATT, KGF, SET, Mainz, Germany, Schering AG, Berlin Germany, Rhone Poulenc Rorer S A, Vitry Seine, France, Nestle A A, Vevoy, Switzerland, Body Shop Levy AG, Zurich, Switzerland, Unilever, Sharnbrook, UK, Wella Cosmital S A, Marly, Switzerland, Zyma S A, Nyon, Switzerland, RCC, Besel, Switzerland, Skan A G, Basel, Switzerland, ECETOC, Brussels, Belgium, Pharmacia Biotech AG, Dubendorf, Switzerland, Pentapharm AG, Basel, Switzerland, USGEB, Geneva, Switzerland, Stift Fonds Versuchstierfreie Forsch, Zurich, Switzerland, SIAT, Zurich, Switzerland, STS, Basel, Switzerland AB Synchronized cultures of Chinese hamster cells (line CHO) were used to measure the effects of 10 mu M sodium arsenite on histone phosphorylation. This treatment caused cell proliferation to be temporarily arrested, after which the cells spontaneously resumed cell proliferation in a radiomimetic manner. Immediately following treatment, it was found that sodium arsenite affected only mitotic-specific H1 and H3 phosphorylations. Neither interphase, nor mitotic, H2A and H4 phosphorylations were affected, nor was interphase H1 phosphorylation affected. The phosphorylation of H1 was inhibited only in mitosis, reducing H1 phosphorylation to 38.1% of control levels, which was the level of interphase H1 phosphorylation. The phosphorylation of both H3 variants was inhibited in mitosis, the less hydrophobic H3 to 19% and the more hydrophobic H3 to 24% of control levels. These results suggest that sodium arsenite may inhibit cell proliferation by interfering with the cyclin B/p34(cdc2) histone kinase activity which is thought to play a key role in regulating the cell cycle. It has been proposed that H1 and H3 phosphorylations play a role in restructuring interphase chromatin into metaphase chromosomes. Interference in this process by sodium arsenite may lead to structurally damaged chromosomes, resulting in the increased cancer risks known to be produced by arsenic exposure from the environment. C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP COBO, JM (reprint author), UNIV ALCALA DE HENARES,FAC FARM,DEPT NUTR & BROMATOL,E-28871 ALCALA DE HENARES,SPAIN. NR 21 TC 4 Z9 4 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0887-2333 J9 TOXICOL IN VITRO JI Toxicol. Vitro PD AUG PY 1995 VL 9 IS 4 BP 459 EP 465 DI 10.1016/0887-2333(95)00038-A PG 7 WC Toxicology SC Toxicology GA RT918 UT WOS:A1995RT91800016 PM 20650113 ER PT J AU ALESSANDRINI, G ISAKOV, V POWELL, J AF ALESSANDRINI, G ISAKOV, V POWELL, J TI LOCAL UNIQUENESS IN THE INVERSE CONDUCTIVITY PROBLEM WITH ONE MEASUREMENT SO TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY LA English DT Article AB We prove local uniqueness of a domain D entering the conductivity equation div((1 + chi(D))del u) = 0 in a bounded planar domain Omega given the Cauchy data for u on a part of partial derivative Omega. The main assumption is that del u has zero index on partial derivative Omega which is easy to guarantee by choosing special boundary data for u. To achieve our goals we study index of critical points of u on partial derivative Omega. C1 WICHITA STATE UNIV,DEPT MATH & STAT,WICHITA,KS 67260. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP ALESSANDRINI, G (reprint author), UNIV TRIESTE,DIPARTIMENTO SCI MATEMAT,I-34100 TRIESTE,ITALY. OI Alessandrini, Giovanni/0000-0002-1975-1299 NR 14 TC 36 Z9 36 U1 0 U2 0 PU AMER MATHEMATICAL SOC PI PROVIDENCE PA 201 CHARLES ST, PROVIDENCE, RI 02940-2213 SN 0002-9947 J9 T AM MATH SOC JI Trans. Am. Math. Soc. PD AUG PY 1995 VL 347 IS 8 BP 3031 EP 3041 DI 10.2307/2154768 PG 11 WC Mathematics SC Mathematics GA RP152 UT WOS:A1995RP15200016 ER PT J AU JOHNSON, BJB SVIAT, SL HAPP, CM DUNN, JJ FRANTZ, JC MAYER, LW PIESMAN, J AF JOHNSON, BJB SVIAT, SL HAPP, CM DUNN, JJ FRANTZ, JC MAYER, LW PIESMAN, J TI INCOMPLETE PROTECTION OF HAMSTERS VACCINATED WITH UNLIPIDATED OSPA FROM BORRELIA-BURGDORFERI INFECTION IS ASSOCIATED WITH LOW-LEVELS OF ANTIBODY TO AN EPITOPE DEFINED BY MAB LA-2 SO VACCINE LA English DT Article DE LYME DISEASE; BORRELIA BURGDORFERI; OUTER SURFACE PROTEIN; VACCINE; LA-2 ANTIBODY ID OUTER SURFACE PROTEIN; LINKED-IMMUNOSORBENT-ASSAY; LYME-DISEASE; MOLECULAR ANALYSIS; NORTH-AMERICAN; TICKS; MICE; HETEROGENEITY; IMMUNIZATION; ARTHRITIS AB Efforts to develop a recombinant vaccine for Lyme disease have focused on using the outer surface protein A (OspA) of Borrelia burgdorferi as an immunogen. We evaluated the effectiveness of an unlipidated recombinant OspA as a vaccine in hamsters. This molecule is soluble and can be produced in high yield in Escherichia coli, characteristics that permit simple and relatively low cost production Vaccination with unlipidated OspA protected a substantial portion of animals-59-79%, depending on the challenge strain and route-against moderate doses of spirochetes delivered either by injection or by bite of infected nymphal ticks (Ixodes scapularis), The instances of vaccine failure were associated with development of low levels of antibody to a particular OspA epitope, one defined by mAb LA-2. At least 50 ng ml(-1) of LA-2 equivalent antibody was necessary for protection of hamsters. Lower LA-2 equivalent antibody concentrations occurred in unprotected animals in the presence of high-titered polyclonal antibody to native OspA. A competitive binding assay to quantitate this serum fraction is described that should be of use in monitoring the quality of the antibody response to OspA in vaccine trials. Concentrations of LA-2 equivalent antibody parallel the ability of the serum specimens to inhibit the growth of B. burgdorferi in culture. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. SMITHKLINE BEECHAM ANIM HLTH,VET PHARMACEUT & BIOL,LINCOLN,NE 68501. CTR DIS CONTROL,DIV BACTERIAL & MYCOT DIS,ATLANTA,GA 30333. RP JOHNSON, BJB (reprint author), CTR DIS CONTROL & PREVENT,NATL CTR INFECT DIS,DIV VECTOR BORNE INFECT DIS,FT COLLINS,CO 80522, USA. NR 40 TC 43 Z9 43 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0264-410X J9 VACCINE JI Vaccine PD AUG PY 1995 VL 13 IS 12 BP 1086 EP 1094 DI 10.1016/0264-410X(95)00035-Y PG 9 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA RV517 UT WOS:A1995RV51700007 PM 7491816 ER PT J AU HSEUH, HC WELCH, KM AF HSEUH, HC WELCH, KM TI DEVELOPMENTS IN THE VACUUM-SYSTEMS OF AGS-RHIC SO VACUUM LA English DT Article; Proceedings Paper CT 4th European Vacuum Conference (EVC-4)1st Swedish Vacuum Meeting (SVM-1) CY JUN 13-17, 1994 CL UPPSALA, SWEDEN SP Royal Swedish Acad Sci, Swedish Board Tech & Ind Dev, Swedish Res Council Engn Sci, Fisons Instruments, IUVSTA, Leybold, Nordiska Balzers AB, Balzers AG, Balzers Pfeiffer AG, Swedish Nat Sci Res Council, Int Sci Fdn, Swedish Vacuum Soc, Uppsala Univ, City Uppsala ID ION PUMPS; HYDROGEN; HELIUM AB The alternating gradient synchrotron (AGS) is a synchrotron for the acceleration of protons and heavy ions to tens of GeV amu(-1) for fixed target physics research. The relativistic heavy ion collider (RHIC), with the AGS as its injector, allows the collision of heavy ion beams with several hundred GeV amu(-1). The vacuum systems of the AGS-RHIC complex range from 10(-6) torr in the ion sources to the ultrahigh vacuum of low 10(-11) torr in the Booster and RHIC. The status of the machines will be described with emphasis on the following areas: the performance of the Booster ultrahigh vacuum system, the development of non-magnetic vacuum components for the muon storage ring, and progress in the construction of the RHIC vacuum systems. RP HSEUH, HC (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0042-207X J9 VACUUM JI Vacuum PD AUG-OCT PY 1995 VL 46 IS 8-10 BP 803 EP 809 DI 10.1016/0042-207X(95)00043-7 PG 7 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA RR063 UT WOS:A1995RR06300015 ER PT J AU WADDILL, GD TOBIN, JG GUO, X TONG, SY AF WADDILL, GD TOBIN, JG GUO, X TONG, SY TI A STRUCTURAL DETERMINATION USING MAGNETIC-X-RAY CIRCULAR-DICHROISM IN SPIN-POLARIZED PHOTOELECTRON DIFFRACTION SO VACUUM LA English DT Article; Proceedings Paper CT 4th European Vacuum Conference (EVC-4)1st Swedish Vacuum Meeting (SVM-1) CY JUN 13-17, 1994 CL UPPSALA, SWEDEN SP Royal Swedish Acad Sci, Swedish Board Tech & Ind Dev, Swedish Res Council Engn Sci, Fisons Instruments, IUVSTA, Leybold, Nordiska Balzers AB, Balzers AG, Balzers Pfeiffer AG, Swedish Nat Sci Res Council, Int Sci Fdn, Swedish Vacuum Soc, Uppsala Univ, City Uppsala ID CORE-LEVEL PHOTOEMISSION; FCC FE FILMS; ULTRATHIN FILMS; SCATTERING; FE/CU(001); CU(100); FERROMAGNETS; TRANSITION; SOLIDS; ORDER AB The first structural determination with spin-polarized, energy-dependent photoelectron diffraction using circularly-polarized X-rays is reported for Fe films on Cu(001). Circularly-polarized X-rays produce spin-polarized photoelectrons from the Fe 2p doublet, and intensity asymmetries in the 2p, level are observed. Fully spin-specific multiple scattering calculations reproduce the experimentally-determined energy and angular dependences. A new analytical procedure which focuses upon intensify variations due to spin-dependent diffraction is introduced. C1 UNIV WISCONSIN,SURFACE STUDIES LAB,MILWAUKEE,WI 53201. UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53201. RP WADDILL, GD (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550, USA. RI Tobin, James/O-6953-2015 NR 30 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0042-207X J9 VACUUM JI Vacuum PD AUG-OCT PY 1995 VL 46 IS 8-10 BP 1233 EP 1236 DI 10.1016/0042-207X(95)00150-6 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA RR063 UT WOS:A1995RR06300119 ER PT J AU WICKHAM, JD WADE, TG JONES, KB RIITTERS, KH ONEILL, RV AF WICKHAM, JD WADE, TG JONES, KB RIITTERS, KH ONEILL, RV TI DIVERSITY OF ECOLOGICAL COMMUNITIES OF THE UNITED-STATES SO VEGETATIO LA English DT Article DE BIOLOGICAL ORGANIZATION; GIS; ISOLINE MAPS; LATITUDINAL AND LONGITUDINAL GRADIENTS; REMOTE SENSING; SCALE ID MONITORING BIODIVERSITY; SPECIES RICHNESS; PATTERNS; ENERGY AB Biodiversity, although recognized as encompassing several levels of biological organization, is often thought of as species diversity Three diversity estimates were calculated for the conterminous United States using satellite data acquired from the Advanced Very High Resolution Radiometer (AVHRR): land cover richness, vegetation richness, and vegetation clustering. Vegetation richness and vegetation clustering showed a scare-dependent relationship to elevation across the range of quadrat sizes from 500 to 50,000 mi(2). All diversity measures increased east to west, with a rather abrupt transition at the Colorado Front Range. The longitudinal diversity gradients found in this study are in contrast to the reported latitudinal and longitudinal gradients for species diversity. C1 DESERT RES INST,CTR BIOL SCI,RENO,NV 89512. US EPA,ENVIRONM MONITORING SYST LAB,LAS VEGAS,NV 89193. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. TENNESSEE VALLEY AUTHOR,SO APPALACHIAN MAN & BIOSPHERE PROGRAM,NORRIS,TN 37828. NR 34 TC 13 Z9 13 U1 0 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0042-3106 J9 VEGETATIO JI Vegetatio PD AUG PY 1995 VL 119 IS 2 BP 91 EP 100 DI 10.1007/BF00045592 PG 10 WC Plant Sciences; Ecology; Forestry SC Plant Sciences; Environmental Sciences & Ecology; Forestry GA TA077 UT WOS:A1995TA07700001 ER PT J AU MCNAB, WW NARASIMHAN, TN AF MCNAB, WW NARASIMHAN, TN TI REACTIVE TRANSPORT OF PETROLEUM HYDROCARBON CONSTITUENTS IN A SHALLOW AQUIFER - MODELING GEOCHEMICAL INTERACTIONS BETWEEN ORGANIC AND INORGANIC SPECIES SO WATER RESOURCES RESEARCH LA English DT Article ID GRAVEL AQUIFER; CRUDE-OIL; ANOXIC GROUNDWATER; CHEMICAL-TRANSPORT; SAND; SUBSURFACE AB Dissolved organic contaminants such as petroleum hydrocarbon constituents are often observed to degrade in groundwater environments through biologically mediated transformation reactions into carbon dioxide, methane, or intermediate organic compounds. Such transformations are closely tied to local geochemical conditions. Favorable degradation pathways depend upon local redox conditions through thermodynamic constraints and the availability of appropriate mediating microbial populations. Conversely, the progress of the degradation reactions may affect the chemical composition of groundwater through changes in electron donor/acceptor speciation and pH, possibly inducing mineral precipitation/dissolution reactions. Transport of reactive organic and inorganic aqueous species through open systems may enhance the reaction process by mixing unlike waters and producing a state of general thermodynamic disequilibrium. In this study, field data from an aquifer contaminated by petroleum hydrocarbons have been analyzed using a mathematical model which dynamically couples equilibrium geochemistry of inorganic constituents, kinetically dominated sequential degradation of organic compounds, and advective-dispersive chemical transport. Simulation results indicate that coupled geochemical processes inferred from field data, such as organic biodegradation, iron reduction and dissolution, and methanogenesis, can be successfully modeled using a partial-redox-disequilibrium approach. The results of this study also suggest how the modeling approach can be used to study system sensitivity to various physical and chemical parameters, such as the effect of dispersion on the position of chemical fronts and the impact of alternative buffering mineral phases (e.g., goethite versus amorphous Fe(OH)(3)) on water chemistry. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. NR 14 TC 21 Z9 21 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD AUG PY 1995 VL 31 IS 8 BP 2027 EP 2033 DI 10.1029/95WR01254 PG 7 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA RM644 UT WOS:A1995RM64400018 ER PT J AU ASZTALOS, SJ FALLON, P CLARK, RM BECKER, JA BERNSTEIN, LA CEDERWALL, B DELEPLANQUE, MA DIAMOND, RM FARRIS, LP HENRY, EA KELLY, WH LEE, IY MACCHIAVELLI, AO STEPHENS, FS AF ASZTALOS, SJ FALLON, P CLARK, RM BECKER, JA BERNSTEIN, LA CEDERWALL, B DELEPLANQUE, MA DIAMOND, RM FARRIS, LP HENRY, EA KELLY, WH LEE, IY MACCHIAVELLI, AO STEPHENS, FS TI CONFIRMATION OF THE SUPERDEFORMED BAND IN PB-192 SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Note AB High-spin states in Pb-192 were populated via the reaction Yb-173(Mg-24,5n) at a beam energy of 140 MeV, and the resulting gamma-rays were deteced using GAMMA-SPHERE. A previously observed superdeformed band in Pb-192 has been confirmed. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. RP ASZTALOS, SJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Cederwall, Bo/M-3337-2014 OI Cederwall, Bo/0000-0003-1771-2656 NR 10 TC 2 Z9 2 U1 2 U2 2 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 AUG PY 1995 VL 352 IS 3 BP 239 EP 240 DI 10.1007/BF01289493 PG 2 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA RQ246 UT WOS:A1995RQ24600003 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, M BORISOV, G BOSIO, C BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHIERICI, R CHLIAPNIKOV, P CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W DEFOIX, C RICCA, GD DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B FALK, E FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIBBS, M GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P JACKSON, JN JACOBSON, R JALOCHA, P JANIK, R JARSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, L KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOLOVYANOV, O SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AD VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G AF ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, M BORISOV, G BOSIO, C BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAPKIN, M CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHIERICI, R CHLIAPNIKOV, P CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W DEFOIX, C RICCA, GD DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B FALK, E FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIBBS, M GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K IOANNOU, P JACKSON, JN JACOBSON, R JALOCHA, P JANIK, R JARSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, L KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONJIN, V ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOLOVYANOV, O SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AD VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G TI A MEASUREMENT OF B+ AND B-0 LIFETIMES USING (D)OVER-BAR-L(+) EVENTS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; DELPHI; DECAYS AB A measurement of B meson lifetimes is presented using data collected from 1991 to 1993 by the DELPHI detector at the LEP collider, Samples of events with a D meson and a lepton in the same jet are selected where ($) over bar D(0)l(+) and D*(-)l(+) events originate mainly from the semileptonic decays of B+ and B-0 mesons, respectively. From the reconstructed B decay length and the estimated B momentum, taking into account the dilution due to B decays into ($) over bar D**l(+)v, the following B meson lifetimes and lifetime ratio are measured: tau(B+) = 1.61(-0.16)(+0.16) (stat.) +/- 0.12 (syst.) ps tau(B-0) = 1.61(-0.13)(+0.14) (stat.) +/- 0.08 (syst.) ps tau (B+)/tau(B-0) = 1.00(-0.15)(+0.17) (stat.) +/- 0.10 (syst.) and an average lifetime of B+ and B-0 mesons is obtained: tau(B) = 1.61(-0.07)(+0.08) (stat.) +/- 0.05 (syst.) ps C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. UNIV ESTADUAL RIO JANEIRO,INST FIS,RIO JANEIRO,BRAZIL. COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,BRATISLAVA 84215,SLOVAKIA. COLL FRANCE,PHYS CORPUSCULAIRE LAB,CNRS,IN2P3,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV STRASBOURG 1,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. NATL CTR SCI RES DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. ACAD SCI CZECH REPUBL,INST PHYS,DIV HIGH ENERGY PHYS,FZU,CR-18040 PRAGUE 8,CZECH REPUBLIC. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,INST SCI NUCL,CNRS,IN2P3,F-38026 GRENOBLE,FRANCE. SEFT,HIGH ENERGY PHYS RES INST,SF-00014 HELSINKI,FINLAND. JOINT INST NUCL RES,MOSCOW 101000,RUSSIA. UNIV KARLSRUHE,INST EXPTL KERNPHYS,D-76128 KARLSRUHE,GERMANY. INST NUCL PHYS,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,CNRS,IN2P3,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV PARIS 06,CNRS,IN2P3,LPNHE,F-75252 PARIS 05,FRANCE. UNIV PARIS 07,F-75252 PARIS 05,FRANCE. LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,IPNL,CNRS,IN2P3,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CNRS,IN2P3,F-13288 MARSEILLE 9,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. CHARLES UNIV,NUCL CTR MFF,CR-18000 PRAGUE 8,CZECH REPUBLIC. NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OVIEDO,DIPARTIMENTO FIS,E-33006 OVIEDO,SPAIN. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. CENS,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN. PROTVINO HIGH ENERGY PHYS INST,PROTVINO 142284,RUSSIA. UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61000,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,LJUBLJANA 61000,SLOVENIA. UNIV STOCKHOLM,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV FED RIO JANEIRO,BR-21945970 RIO JANEIRO,BRAZIL. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. UNIV VALENCIA,CSIC,IFIC,E-46100 BURJASSOT,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL 1,GERMANY. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. RP ABREU, P (reprint author), FCUL,IST,LIP,AV ELIAS GARCIA 14-1,P-1000 LISBON,PORTUGAL. RI Barrio, Juan/L-3227-2014; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; de Paula, Leandro/I-9278-2012; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; Ragazzi, Stefano/D-2463-2009; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Rames, Jiri/H-2450-2014; Contreras Gonzalez, Jose Luis/K-7255-2014; Navas, Sergio/N-4649-2014; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Mundim, Luiz/A-1291-2012; Yip, Kin/D-6860-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014 OI Barrio, Juan/0000-0002-0965-0259; Shellard, Ronald/0000-0002-2983-1815; Ruiz, Alberto/0000-0002-3639-0368; Petrolini, Alessandro/0000-0003-0222-7594; de Paula, Leandro/0000-0002-4984-7734; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Krammer, Manfred/0000-0003-2257-7751; Ragazzi, Stefano/0000-0001-8219-2074; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Navas, Sergio/0000-0003-1688-5758; Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Tome, Bernardo/0000-0002-7564-8392; Pimenta, Mario/0000-0002-2590-0908; NR 23 TC 16 Z9 16 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD AUG PY 1995 VL 68 IS 1 BP 13 EP 23 PG 11 WC Physics, Particles & Fields SC Physics GA RT892 UT WOS:A1995RT89200002 ER PT J AU DERRICK, M KRAKAUER, D MAGILL, S MIKUNAS, D MUSGRAVE, B REPOND, J STANEK, R TALAGA, RL ZHANG, H AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CONTIN, A CORRADI, M GIALAS, I GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F POLLINI, A SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A CRITTENDEN, J DESCH, K DIEKMANN, B DOEKER, T ECKERT, M FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HAAS, T HARTMANN, H HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C 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, CIS NORMAN, DJP OMARA, JA TAPPER, RJ WILSON, SS YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A CARTIGLIA, N PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S ZHU, Q BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BEIER, H BIENLEIN, JK COLDEWEY, C DEPPE, O DESLER, K DREWS, G FLASINSKI, M GILKINSON, DJ GLASMAN, C GOTTLICHER, P GROSSEKNETTER, J GUTJAHR, B HAIN, W HASELL, D HESSLING, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MONTEIRO, T NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M ROLDAN, J SCHNEEKLOTH, U SCHULZ, W SELONKE, F STILIARIS, E SURROW, B VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C ZHOU, JF GRABOSCH, HJ KHARCHILAVA, A LEICH, A MATTINGLY, MCK MEYER, A SCHLENSTEDT, S WULFF, N BARBAGLI, G PELFER, P ANZIVINO, G MACCARRONE, G DEPASQUALE, S VOTANO, L BAMBERGER, A EISENHARDT, S FREIDHOF, A SOLDNERREMBOLD, S SCHROEDER, J TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, JI SAXON, DH UTLEY, ML WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD HAGGE, L LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W ZETSCHE, F BACON, TC BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BYH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ WANG, SM WU, JT ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G FERNANDEZ, JP GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L MARTINEZ, M DELPESO, J PUGA, J TERRON, J DETROCONIZ, JF SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG PATEL, PM SINCLAIR, LE STAIRS, DG STLAURENT, M ULLMANN, R ZACEK, G 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 BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEKAMPS, M KOOIJMAN, P KRUSE, A 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 BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE HARNEW, N LANCASTER, M LINDEMANN, L MCFALL, JD NATH, C NOYES, VA QUADT, A TICKNER, JR UIJTERWAAL, H WALCZAK, R WATERS, DS WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G MARINI, G NIGRO, A TASSI, E HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W RAHN, JT SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ SCHWARZER, O WALENTA, AH ZECH, G ABRAMOWICZ, H BRISKIN, G DAGAN, S LEVY, A HASEGAWA, T HAZUMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAKAMITSU, Y YAMAUCHI, K 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, RL SHULMAN, J BLANKENSHIP, K LU, B MO, LW BOGUSZ, W CHARCHULA, K GAJEWSKI, J GRZELAK, G KASPRZAK, M KRZYZANOWSKI, M MUCHOROWSKI, K NOWAK, RJ PAWLAK, JM TYMIENIECKA, T WROBLEWSKI, AK ZAKIZEWSKI, JA ZARNECKI, AF ADAMUS, M EISENBERG, Y KARSHON, U REVEL, D ZERZION, D ALI, I BADGETT, WF BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERTSEIN, S SMITH, WH VAICIULIS, A WODARCZYK, M TSURUGAI, T BHADRA, S CARDY, ML FAGERSTROEM, CP FRISKEN, WR FURUTANI, KM KHAKZAD, M SCHMIDKE, WB AF DERRICK, M KRAKAUER, D MAGILL, S MIKUNAS, D MUSGRAVE, B REPOND, J STANEK, R TALAGA, RL ZHANG, H AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CONTIN, A CORRADI, M GIALAS, I GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, G MARGOTTI, A MASSAM, T NANIA, R NEMOZ, C PALMONARI, F POLLINI, A SARTORELLI, G TIMELLINI, R GARCIA, YZ ZICHICHI, A BARGENDE, A CRITTENDEN, J DESCH, K DIEKMANN, B DOEKER, T ECKERT, M FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HAAS, T HARTMANN, H HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C 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, CIS NORMAN, DJP OMARA, JA TAPPER, RJ WILSON, SS YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A CARTIGLIA, N PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S ZHU, Q BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BEIER, H BIENLEIN, JK COLDEWEY, C DEPPE, O DESLER, K DREWS, G FLASINSKI, M GILKINSON, DJ GLASMAN, C GOTTLICHER, P GROSSEKNETTER, J GUTJAHR, B HAIN, W HASELL, D HESSLING, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MONTEIRO, T NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M ROLDAN, J SCHNEEKLOTH, U SCHULZ, W SELONKE, F STILIARIS, E SURROW, B VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C ZHOU, JF GRABOSCH, HJ KHARCHILAVA, A LEICH, A MATTINGLY, MCK MEYER, A SCHLENSTEDT, S WULFF, N BARBAGLI, G PELFER, P ANZIVINO, G MACCARRONE, G DEPASQUALE, S VOTANO, L BAMBERGER, A EISENHARDT, S FREIDHOF, A SOLDNERREMBOLD, S SCHROEDER, J TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, JI SAXON, DH UTLEY, ML WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD HAGGE, L LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W ZETSCHE, F BACON, TC BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BYH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ WANG, SM WU, JT ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G FERNANDEZ, JP GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L MARTINEZ, M DELPESO, J PUGA, J TERRON, J DETROCONIZ, JF SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG PATEL, PM SINCLAIR, LE STAIRS, DG STLAURENT, M ULLMANN, R ZACEK, G 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 BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEKAMPS, M KOOIJMAN, P KRUSE, A 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 BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE HARNEW, N LANCASTER, M LINDEMANN, L MCFALL, JD NATH, C NOYES, VA QUADT, A TICKNER, JR UIJTERWAAL, H WALCZAK, R WATERS, DS WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G MARINI, G NIGRO, A TASSI, E HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W RAHN, JT SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ SCHWARZER, O WALENTA, AH ZECH, G ABRAMOWICZ, H BRISKIN, G DAGAN, S LEVY, A HASEGAWA, T HAZUMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAKAMITSU, Y YAMAUCHI, K 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, RL SHULMAN, J BLANKENSHIP, K LU, B MO, LW BOGUSZ, W CHARCHULA, K GAJEWSKI, J GRZELAK, G KASPRZAK, M KRZYZANOWSKI, M MUCHOROWSKI, K NOWAK, RJ PAWLAK, JM TYMIENIECKA, T WROBLEWSKI, AK ZAKIZEWSKI, JA ZARNECKI, AF ADAMUS, M EISENBERG, Y KARSHON, U REVEL, D ZERZION, D ALI, I BADGETT, WF BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERTSEIN, S SMITH, WH VAICIULIS, A WODARCZYK, M TSURUGAI, T BHADRA, S CARDY, ML FAGERSTROEM, CP FRISKEN, WR FURUTANI, KM KHAKZAD, M SCHMIDKE, WB TI NEUTRAL STRANGE PARTICLE-PRODUCTION IN DEEP-INELASTIC SCATTERING AT HERA SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID CHARGED-CURRENT INTERACTIONS; E+E ANNIHILATION; PARTON DISTRIBUTIONS; POMERON STRUCTURE; HIGH-ENERGY; ZEUS; CALORIMETER; JET; FRAGMENTATION; SUPPRESSION AB This paper presents measurements of K-0 and Lambda production in neutral current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in the kinematic range 10 < Q(2) < 640 GeV2, 0.0003 < x < 0.01, and y > 0.04. Average multiplicities for K-0 and Lambda production are determined for transverse momenta p(T) > 0.5 GeV and pseudorapidities \eta\ < 1.3. The multiplicities favour a stronger strange to light quark suppression in the fragmentation chain than found in e(+)e(-) experiments. The production properties of K-0's in events with and without a large rapidity gap with respect to the proton direction are compared. The ratio of neutral K-0's to charged particles per event in the measured kinematic range is, within the present statistics, the same in both samples. C1 UNIV BOLOGNA, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. UNIV BONN, INST PHYS, W-5300 BONN, GERMANY. UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. UNIV CALABRIA, DEPT PHYS, COSENZA, ITALY. IST NAZL FIS NUCL, COSENZA, ITALY. COLUMBIA UNIV, NEVIS LABS, HUDSON, NY USA. INST NUCL PHYS, KRAKOW, POLAND. ACAD MIN & MET, FAC PHYS & NUCL TECH, KRAKOW, POLAND. JAGIELLONIAN UNIV, DEPT PHYS, KRAKOW, POLAND. DESY, W-2000 HAMBURG, GERMANY. DESY, INST HOCHENERGIEPHYS, ZEUTHEN, GERMANY. UNIV FLORENCE, I-50121 FLORENCE, ITALY. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY. UNIV FREIBURG, FAK PHYS, W-7800 FREIBURG, GERMANY. UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW, LANARK, SCOTLAND. UNIV HAMBURG, INST EXPTL PHYS 1, HAMBURG, GERMANY. UNIV HAMBURG, INST EXPTL PHYS 2, HAMBURG, GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, HIGH ENERGY NUCL PHYS GRP, LONDON, ENGLAND. UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA. FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST KERNPHYS, W-5170 JULICH, GERMANY. KOREA UNIV, SEOUL 136701, SOUTH KOREA. LOUISIANA STATE UNIV, DEPT PHYS & ASTRON, BATON ROUGE, LA 70803 USA. UNIV AUTONOMA MADRID, DEPT FIS TEOR, E-28049 MADRID, SPAIN. UNIV MANITOBA, DEPT PHYS, WINNIPEG, MB R3T 2N2, CANADA. MCGILL UNIV, DEPT PHYS, MONTREAL, PQ, CANADA. MOSCOW ENGN PHYS INST, MOSCOW 115409, RUSSIA. MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW, RUSSIA. NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, AMSTERDAM, NETHERLANDS. OHIO STATE UNIV, DEPT PHYS, COLUMBUS, OH 43210 USA. UNIV OXFORD, DEPT PHYS, OXFORD, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, PADUA, ITALY. IST NAZL FIS NUCL, PADUA, ITALY. PENN STATE UNIV, DEPT PHYS, UNIVERSITY PK, PA 16802 USA. UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY. IST NAZL FIS NUCL, ROME, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. IROE, I-50127 FLORENCE, ITALY. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, SIEGEN, GERMANY. TEL AVIV UNIV, SCH PHYS, TEL AVIV, ISRAEL. UNIV TOKYO, INST NUCL STUDY, TOKYO, JAPAN. TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO, JAPAN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. TORINO UNIV, FAC SCI 2, ALESSANDRIA, ITALY. IST NAZL FIS NUCL, ALESSANDRIA, ITALY. UNIV TORONTO, DEPT PHYS, TORONTO, ON, CANADA. UCL, DEPT PHYS & ASTRON, LONDON, ENGLAND. VIRGINIA POLYTECH INST & STATE UNIV, DEPT PHYS, BLACKSBURG, VA 24061 USA. UNIV WARSAW, INST EXPTL PHYS, WARSAW, POLAND. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. WEIZMANN INST SCI, DEPT NUCL PHYS, IL-76100 REHOVOT, ISRAEL. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. MEIJI GAKUIN UNIV, FAC GEN EDUC, YOKOHAMA, KANAGAWA, JAPAN. YORK UNIV, DEPT PHYS, N YORK, ON M3J 1P3, CANADA. RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Bashkirov, Vladimir/A-4818-2008; De Pasquale, Salvatore/B-9165-2008; Lancaster, Mark/C-1693-2008; Gladilin, Leonid/B-5226-2011; Morandin, Mauro/A-3308-2016; Doyle, Anthony/C-5889-2009; Golubkov, Yury/E-1643-2012; Proskuryakov, Alexander/J-6166-2012; Katz, Uli/E-1925-2013; Wiggers, Leo/B-5218-2015; Hernandez Calama, Jose Maria/H-9127-2015; Tassi, Enrico/K-3958-2015; Solomin, Anatoly/C-3072-2016; Graciani Diaz, Ricardo/I-5152-2016; OI De Pasquale, Salvatore/0000-0001-9236-0748; Gladilin, Leonid/0000-0001-9422-8636; Morandin, Mauro/0000-0003-4708-4240; Doyle, Anthony/0000-0001-6322-6195; Katz, Uli/0000-0002-7063-4418; Wiggers, Leo/0000-0003-1060-0520; Hernandez Calama, Jose Maria/0000-0001-6436-7547; Graciani Diaz, Ricardo/0000-0001-7166-5198; Anzivino, Giuseppina/0000-0002-5967-0952; Castellini, Guido/0000-0002-0177-0643; Lancaster, Mark/0000-0002-8872-7292; Utley, Martin/0000-0001-9928-1516 NR 59 TC 36 Z9 36 U1 0 U2 2 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD AUG PY 1995 VL 68 IS 1 BP 29 EP 42 PG 14 WC Physics, Particles & Fields SC Physics GA RT892 UT WOS:A1995RT89200004 ER PT J AU AKESSON, T ALMEHED, S ANGELIS, ALS ANTOS, J ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K DEPOMMIER, P DIGIACOMO, N DILIBERTO, S DODD, JR DOLGOSHEIN, B DREES, A EIDELMAN, S ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P GAIDOT, A GIBRATDEBU, F GIUBELLINO, P GLASSEL, P GOERLACH, U GOLUBKOV, Y HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANNSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MARZARICHIESA, A MASERA, M MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NEVSKI, P NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POMIANOWSKI, P POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SEMAN, M SHIKONIAN, A SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUMAROKOV, A SUNIER, JW TCHERNIATIN, V THOMPSON, J TIKHOMIROV, V VANYASHIN, A VASSEUR, G VEENHOF, RJ WIGMANS, R WILLIS, WJ YEPES, P AF AKESSON, T ALMEHED, S ANGELIS, ALS ANTOS, J ATHERTON, H AUBRY, P BARTELS, HW BEAUDOIN, G BEAULIEU, JM BEKER, H BENARY, O BETTONI, D BISI, V BLEVIS, I BOGGILD, H CLELAND, W CLEMEN, M COLLICK, B CORRIVEAU, F DAGAN, S DEDERICHS, K DEPOMMIER, P DIGIACOMO, N DILIBERTO, S DODD, JR DOLGOSHEIN, B DREES, A EIDELMAN, S ENYO, H ERLANDSSON, B ESTEN, MJ FABJAN, CW FISCHER, P GAIDOT, A GIBRATDEBU, F GIUBELLINO, P GLASSEL, P GOERLACH, U GOLUBKOV, Y HAGLUND, R HAMEL, LA VANHECKE, H HEDBERG, V HEIFETZ, R HOLSCHER, A JACAK, B JARLSKOG, G JOHANNSON, S KRANER, H KROH, V LAMARCHE, F LEROY, C LISSAUER, D LONDON, G LORSTAD, B LOUNIS, A MARTELLI, F MARZARICHIESA, A MASERA, M MAZZONI, MA MAZZUCATO, E MCCUBBIN, ML MCCUBBIN, NA MCGAUGHEY, P MEDDI, F MJORNMARK, U MUCIACCIA, MT MURAVIEV, S MURRAY, M NEUBERT, M NEVSKI, P NILSSON, S OLSEN, L OREN, Y PANSART, JP PARK, YM PFEIFFER, A PIUZ, F POLYCHRONAKOS, V POMIANOWSKI, P POULARD, G PRICE, M RAHM, D RAMELLO, L RICCATI, L ROMANO, G ROSA, G SANDOR, L SCHUKRAFT, J SEKIMOTO, M SEMAN, M SHIKONIAN, A SHMELEVA, A SIDOROV, V SIMONE, S SIROIS, Y SLETTEN, H SMIRNOV, S SONDHEIM, W SPECHT, HJ STERN, E STUMER, I SUMAROKOV, A SUNIER, JW TCHERNIATIN, V THOMPSON, J TIKHOMIROV, V VANYASHIN, A VASSEUR, G VEENHOF, RJ WIGMANS, R WILLIS, WJ YEPES, P TI LOW-MASS LEPTON-PAIR PRODUCTION IN P-BE COLLISIONS AT 450 GEV/C SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID INTERSECTING STORAGE-RINGS; PROTON-NUCLEUS COLLISIONS; LOW TRANSVERSE-MOMENTUM; GEV-C; MUON PAIRS; PROMPT POSITRONS; MESON PRODUCTION; PI+/-P; CERN; CONTINUUM AB We report on the production of low-mass electron pairs and muon pairs in p-Be collisions at 450 GeV/c at the CERN SPS. For both electron and muon pairs the low-mass spectrum can be explained satisfactorily by lepton pairs from hadronic decays, and there is no need to invoke any ''unconventional'' source. The normalisation of the major hadronic sources is set by the data. The upper limit, at 90% confidence level, on any new source of lepton pairs is similar to 20% of the hadronic decay contribution for muons, and similar to 40% for electrons. C1 UNIV BARI,I-70100 BARI,ITALY. IST NAZL FIS NUCL,I-70100 BARI,ITALY. BROOKHAVEN NATL LAB,UPTON,NY 11973. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV HEIDELBERG,D-69120 HEIDELBERG,GERMANY. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV MONTREAL,MONTREAL,PQ HC3 3J7,CANADA. PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA. MOSCOW ENGN PHYS INST,MOSCOW 115409,RUSSIA. NOVOSIBIRSK NUCL PHYS INST,NOVOSIBIRSK 630090,RUSSIA. UNIV PITTSBURGH,PITTSBURGH,PA 15260. UNIV ROMA LA SAPIENZA,I-00185 ROME,ITALY. IST NAZL FIS NUCL,I-00185 ROME,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. CEA SACLAY,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV SALERNO,I-84100 SALERNO,ITALY. IST NAZL FIS NUCL,I-84100 SALERNO,ITALY. UNIV STOCKHOLM,S-11346 STOCKHOLM,SWEDEN. TEL AVIV UNIV,IL-69978 RAMAT AVIV,ISRAEL. UNIV TURIN,I-10100 TURIN,ITALY. IST NAZL FIS NUCL,I-10100 TURIN,ITALY. UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND. MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA. RP AKESSON, T (reprint author), LUND UNIV,S-22362 LUND,SWEDEN. RI Smirnov, Sergei/F-1014-2011; Golubkov, Yury/E-1643-2012; Masera, Massimo/J-4313-2012; Ramello, Luciano/F-9357-2013; Vanyashin, Aleksandr/H-7796-2013; Tikhomirov, Vladimir/M-6194-2015; Shmeleva, Alevtina/M-6199-2015; Martelli, Filippo/P-4041-2015 OI Simone, Saverio/0000-0003-3631-8398; Masera, Massimo/0000-0003-1880-5467; Smirnov, Sergei/0000-0002-6778-073X; Vanyashin, Aleksandr/0000-0002-0367-5666; Tikhomirov, Vladimir/0000-0002-9634-0581; Martelli, Filippo/0000-0003-3761-8616 NR 80 TC 58 Z9 59 U1 0 U2 3 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD AUG PY 1995 VL 68 IS 1 BP 47 EP 64 DI 10.1007/BF01579804 PG 18 WC Physics, Particles & Fields SC Physics GA RT892 UT WOS:A1995RT89200006 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P ANYKEYEV, V APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARATE, R BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C CASSIO, V GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHLIAPNIKOV, P CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W DEFOIX, C DELLARICCA, G DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRARD, F GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K JOANNOU, P JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, J KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, L SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, L STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORNE, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAN, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANELDIK, J VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YIP, K YU, L YUSHCHENKO, O ZACH, F ZACHARATOU, C ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHIGUNOV, V ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G AF ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P ANYKEYEV, V APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARATE, R BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C CASSIO, V GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHLIAPNIKOV, P CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, W DEFOIX, C DELLARICCA, G DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRARD, F GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAIDER, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HRUBEC, J HUET, K HULTQVIST, K JOANNOU, P JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, J KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, L SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, L STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORNE, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAN, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANELDIK, J VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YIP, K YU, L YUSHCHENKO, O ZACH, F ZACHARATOU, C ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHIGUNOV, V ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G TI STRANGE BARYON PRODUCTION IN Z-HADRONIC DECAYS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LUND MONTE-CARLO; JETS; Z(0) AB A study of the production of strange octet and decuplet baryons in hadronic decays of the Z recorded by the DELPHI detector at LEP is presented. This includes the first measurement of the Sigma(+/-) average multiplicity. The total and differential cross sections, the event topology and the baryon-antibaryon correlations are compared with current hadronization models. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. VUB,ULB,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. UNIV ESTADUAL RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL. COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,BRATISLAVA 84215,SLOVAKIA. COLL FRANCE,IN2P3,PHYS CORPUSCULAIRE LAB,CNRS,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. ULP,IN2P3,CTR RECH NUCL,CNRS,F-67037 STRASBOURG,FRANCE. NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE. ACAD SCI CZECH REPUBL,INST PHYS,DIV HIGH ENERGY PHYS,FZU,CR-18040 PRAGUE 8,CZECH REPUBLIC. UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,INST SCI NUCL,IN2P3,CNRS,F-38026 GRENOBLE,FRANCE. SEFT,HIGH ENERGY PHYS RES INST,SF-00014 HELSINKI,FINLAND. JOINT INST NUCL RES,MOSCOW 101000,RUSSIA. UNIV KARLSRUHE,INST EXPTL KERNPHYS,D-76128 KARLSRUHE,GERMANY. KRAKOV NUCL PHYS INST,HIGH ENERGY PHYS LAB,PL-30055 KRAKOW 30,POLAND. UNIV PARIS 11,IN2P3,ACCELERATEUR LINEAIRE LAB,CNRS,F-91405 ORSAY,FRANCE. UNIV LANCASTER,SCH PHYS & MAT,LANCASTER LA1 4YB,ENGLAND. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV PARIS 06,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE. UNIV PARIS 07,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE. LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN. UNIV LYON 1,IPNL,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE. UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. CHARLES UNIV,MFF,CTR NUCL,NC,CR-18000 PRAGUE 8,CZECH REPUBLIC. NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OVIEDO,DIPARTIMENTO FIS,E-33006 OVIEDO,SPAIN. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. IST NAZL FIS NUCL,I-35131 PADUA,ITALY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY. IST NAZL FIS NUCL,I-00173 ROME,ITALY. CENS,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN. INST HIGH ENERGY PHYS,PROTVINO,RUSSIA. UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61000,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,LJUBLJANA 61000,SLOVENIA. UNIV STOCKHOLM,FYSIKUM,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. FED UNIV RIO DE JANEIRO,BR-21945970 RIO JANEIRO,BRAZIL. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. CSIC,IFIC,E-46100 BURJASSOT,SPAIN. OSTERR AKAD WISSENSCH,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. UNIV WARSAW,PL-00681 WARSAW,POLAND. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL 1,GERMANY. RP ABREU, P (reprint author), LIP,IST,FCUL,AV ELIAS GARCIA 14-1,P-1000 LISBON,PORTUGAL. RI Hallgren, Allan/A-8963-2013; Mundim, Luiz/A-1291-2012; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Nemecek, Stanislav/G-5931-2014; Ridky, Jan/H-6184-2014; Fernandez, Ester/K-9734-2014; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; Yip, Kin/D-6860-2013; Barrio, Juan/L-3227-2014; Tome, Bernardo/J-4410-2013; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Rames, Jiri/H-2450-2014; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Navas, Sergio/N-4649-2014; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012 OI Mundim, Luiz/0000-0001-9964-7805; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; De Angelis, Alessandro/0000-0002-3288-2517; Yip, Kin/0000-0002-8576-4311; PREST, MICHELA/0000-0003-3161-4454; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Barrio, Juan/0000-0002-0965-0259; Matteuzzi, Clara/0000-0002-4047-4521; Tome, Bernardo/0000-0002-7564-8392; DE MIN, ALBERTO/0000-0002-8130-9389; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; Maio, Amelia/0000-0001-9099-0009; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Navas, Sergio/0000-0003-1688-5758; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X NR 17 TC 34 Z9 34 U1 0 U2 4 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 AUG PY 1995 VL 67 IS 4 BP 543 EP 553 PG 11 WC Physics, Particles & Fields SC Physics GA RR483 UT WOS:A1995RR48300001 ER PT J AU CHEN, H OLMSTEAD, MM SMITH, DP MAESTRE, MF FISH, RH AF CHEN, H OLMSTEAD, MM SMITH, DP MAESTRE, MF FISH, RH TI THE PH-DEPENDENT SYNTHESIS AND STRUCTURAL STUDY OF DIMER AND CYCLIC TRIMER COMPLEXES OF 9-METHYLHYPOXANTHINE OR 9-ETHYLHYPOXANTHINE NUCLEOBASES WITH (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)RHODIUM AQUA COMPLEXES SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH LA English DT Article DE COMPLEXES WITH NITROGEN LIGANDS; COORDINATION; NUCLEOBASES; RHODIUM COMPOUNDS ID AQUEOUS COORDINATION CHEMISTRY; METALLOCENE ANTITUMOR AGENTS; BIOORGANOMETALLIC CHEMISTRY; MECHANISTIC IMPLICATIONS; CRYSTAL-STRUCTURE; GUANINE; DNA; V(ETA-5-C5H5)2CL2; DERIVATIVES; DICHLORIDE C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF DAVIS,DEPT CHEM,DAVIS,CA 95616. NR 25 TC 59 Z9 59 U1 0 U2 0 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0570-0833 J9 ANGEW CHEM INT EDIT JI Angew. Chem.-Int. Edit. Engl. PD JUL 31 PY 1995 VL 34 IS 13-14 BP 1514 EP 1517 DI 10.1002/anie.199515141 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA RN127 UT WOS:A1995RN12700039 ER PT J AU EBBERS, CA VELSKO, SP AF EBBERS, CA VELSKO, SP TI HIGH AVERAGE POWER KTIOPO4 ELECTROOPTIC Q-SWITCH SO APPLIED PHYSICS LETTERS LA English DT Article ID MODULATOR AB We have demonstrated a thermally compensated KTiOPO4 (KTP) Q-switch with a 10 mm x 6 mm clear aperture and high contrast ratio. This device showed excellent resistance to thermal depolarization at average power densities as high as 1 kW/cm(2). Capacitive coupling allowed us to operate the Q-switch for greater than 10(9) shots with no sign of electrochromic damage. (C) 1995 American Institute of Physics. RP EBBERS, CA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 13 TC 26 Z9 29 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 JUL 31 PY 1995 VL 67 IS 5 BP 593 EP 595 DI 10.1063/1.115399 PG 3 WC Physics, Applied SC Physics GA RL976 UT WOS:A1995RL97600006 ER PT J AU DANTSKER, E LUDWIG, F KLEINER, R CLARKE, J TEEPE, M LEE, LP ALFORD, NM BUTTON, T AF DANTSKER, E LUDWIG, F KLEINER, R CLARKE, J TEEPE, M LEE, LP ALFORD, NM BUTTON, T TI LOW-NOISE YBA2CU3O7-X-SRTIO3-YBA2CU3O7-X MULTILAYERS FOR IMPROVED SUPERCONDUCTING MAGNETOMETERS (VOL 66, PG 373, 1995) SO APPLIED PHYSICS LETTERS LA English DT Correction, Addition C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. CONDUCTUS INC,SUNNYVALE,CA 94086. S BANK UNIV,SCH ELECT ELECTR & INFORMAT ENGN,LONDON SE1 0AA,ENGLAND. UNIV BIRMINGHAM,IRC MAT,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RP DANTSKER, E (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Button, Tim/I-6803-2012 NR 4 TC 37 Z9 37 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 JUL 31 PY 1995 VL 67 IS 5 BP 725 EP 726 DI 10.1063/1.115288 PG 2 WC Physics, Applied SC Physics GA RL976 UT WOS:A1995RL97600051 ER PT J AU GITLER, MS BOULAY, SF SOOD, VK MCPHERSON, DW KNAP, FF ZEEBERG, BR REBA, RC AF GITLER, MS BOULAY, SF SOOD, VK MCPHERSON, DW KNAP, FF ZEEBERG, BR REBA, RC TI CHARACTERIZATION OF IN-VIVO BRAIN MUSCARINIC ACETYLCHOLINE-RECEPTOR SUBTYPE SELECTIVITY BY COMPETITION STUDIES AGAINST (R,S)-[I-125]IQNB SO BRAIN RESEARCH LA English DT Article DE ALZHEIMERS; MUSCARINIC RECEPTOR; M2 SUBTYPE; RADIOLIGAND; BRAIN IMAGING ID EMISSION COMPUTED-TOMOGRAPHY; RAT-BRAIN; ALZHEIMERS-DISEASE; 3-QUINUCLIDINYL 4-IODOBENZILATE; POTENTIAL RADIOPHARMACEUTICALS; INVIVO; BINDING; RADIOLIGAND; LIGAND AB We have studied the in vivo rat brain muscarinic acetylcholine receptor (mAChR) m2 subtype selectivities of three quinuclidine derivatives: (R)-3-quinuclidinyl benzilate (QNB), E-(+,+)-1-azabicyclo[2,2,2]oct-3-yl alpha-hydroxy-alpha-(1-iodo-1-propen-3-yl)-alpha-phenylacetate (E-(+, +)-IQNP), and E-(+, -)-1-azabicyclo[2.2.2]oct-3-yl alpha-hydroxy-alpha-(1-iodo-1-propen-3-yl)-alpha-phenylacetate (E-(+,-) IQNP), and two tricyclic ring compounds: 5-[[4-[4-(diisobutylamino)butyl]-1-pheny]-10,11-dihyro-5H-dibenzo[b,e][1,4]diazepin-11-one (DIBD) and 11-[[4-[4-(diisobutylamino)butyl-1-phenyl]acetyl]-5,11-dihydro -6H-pyrido[2,3-b][1,4]benzodiazepin-6-one (PBID), by correlating the regional inhibition of (R,S)-[I-125]IQNB with the regional composition of the m1-m4 subtypes. Subtle effects are demonstrated after reduction of the between-animal variability by normalization to corpus striatum. Substantial in vivo m2-selectivity is exhibited by QNB and DIBD, modest in vivo m2-selectivity is exhibited by E-(+, +)-IQNP, and little or no in vivo m2-selectivity is exhibited by PBID and E-(+, -)-IQNP. Surprisingly, the in vive m2-selectivity is not correlated with the in vitro m2selectivity. For example, QNB, which appears to be the most strongly in vivo m2-selective compound, exhibits negligible in vitro m2-selectivity. These examples indicate that a strategy which includes only preliminary in vitro screening may very well preclude the discovery of a novel compound which would prove useful in vivo. C1 GEORGE WASHINGTON UNIV,MED CTR,DEPT RADIOL,RADIOPHARMACEUT CHEM SECT,WASHINGTON,DC 20037. OAK RIDGE NATL LAB,DIV HLTH SCI RES,NUCL MED GRP,OAK RIDGE,TN 37831. UNIV CHICAGO HOSP,DEPT RADIOL,NUCL MED SECT,CHICAGO,IL 60637. RI Sood, Vinay/B-7109-2008 FU NINDS NIH HHS [NS22215] NR 31 TC 21 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-8993 J9 BRAIN RES JI Brain Res. PD JUL 31 PY 1995 VL 687 IS 1-2 BP 71 EP 78 DI 10.1016/0006-8993(95)00458-3 PG 8 WC Neurosciences SC Neurosciences & Neurology GA RN162 UT WOS:A1995RN16200007 PM 7583315 ER PT J AU PEURRUNG, AJ KOUZES, RT AF PEURRUNG, AJ KOUZES, RT TI ANALYSIS OF SPACE-CHARGE EFFECTS IN CYCLOTRON-RESONANCE MASS-SPECTROMETRY AS COUPLED GYRATOR PHENOMENA SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article DE COUPLED OSCILLATORS; FOURIER TRANSFORM MASS SPECTROMETRY; MODULATION; SPACE-CHARGE EFFECTS ID PENNING TRAP; FREQUENCY-SHIFTS; IMAGE CHARGE; ION; PRECISION; ISOTOPES; SPECTRA AB Charge clouds that interact as they gyrate about the center of a cyclotron resonance mass spectrometry cell constitute a system of coupled gyrators. This system should exhibit a range of phenomena, including phase locking, modulation, frequency shifts, and energy and momentum exchange. When two or more gyrators are mutually commensurate (the ratio of their frequencies can be expressed with integers), a strong, resonant interaction is possible. Under some conditions the system is chaotic, exhibiting a strong dependence on initial conditions and poor repeatability. This paper treats all of the above effects with the aid of numerical simulation of the motion of interacting charge clouds. These phenomena are collectively known as ''space-charge'' effects and can limit the performance of Fourier transform ion cyclotron resonance mass spectrometers. RP PEURRUNG, AJ (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 34 TC 30 Z9 30 U1 1 U2 3 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 JUL 31 PY 1995 VL 145 IS 3 BP 139 EP 153 DI 10.1016/0168-1176(95)04221-6 PG 15 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA RT086 UT WOS:A1995RT08600003 ER PT J AU KEEBLE, DJ LI, Z POINDEXTER, EH AF KEEBLE, DJ LI, Z POINDEXTER, EH TI ELECTRON-PARAMAGNETIC-RESONANCE OF MN4+ IN PBTIO3 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID SUPERPOSITION-MODEL; BATIO3; CRYSTALS AB The electron paramagnetic resonance spectrum of Mn4+ in single-crystal lead titanate has been studied at 9.8 and 33.8 GHz. An axial sextet with g(perpendicular to)(eff) = 3.7742(1) to g(parallel to)(eff) approximate to 2.00 was measured at 9.8 GHz and with g(perpendicular to)(eff) = 2.7048(15) at 33.8 GHz; a second sextet was observed at high held at 9.8 GHz. The spectrum was fitted using spin Hamiltonian parameters S = 3/2, I =5/2, g(parallel to) = 1.99, g(perpendicular to) = 1.987, A(parallel to) = 79.46 x 10(-4) cm(-1), A(perpendicular to) = 71.05 x 10(-4) cm(-1) and \D\ = 0.3166 cm(-1). The electronic spin value and the magnitude of the hyperfine constant, \A\ = 73.9 cm(-1), confirm the Mn4+ assignment. A superposition model analysis using available (b) over bar(2)(R) functions for 3d(3) configuration ions in oxide hosts was unable to reproduce the observed axial crystal field magnitude, \D\. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. USA,RES LAB,DIV PHYS,FT MONMOUTH,NJ 07703. UNIV DUNDEE,DEPT APPL PHYS & ELECTR & MECH ENGN,DUNDEE DD1 4HN,SCOTLAND. RP KEEBLE, DJ (reprint author), MICHIGAN TECHNOL UNIV,DEPT PHYS,HOUGHTON,MI 49931, USA. RI Keeble, David /C-6633-2012 OI Keeble, David /0000-0002-5378-799X NR 22 TC 23 Z9 24 U1 2 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD JUL 31 PY 1995 VL 7 IS 31 BP 6327 EP 6333 DI 10.1088/0953-8984/7/31/015 PG 7 WC Physics, Condensed Matter SC Physics GA RM972 UT WOS:A1995RM97200015 ER PT J AU SINHA, AK BIHARI, B MANDAL, BK CHEN, L AF SINHA, AK BIHARI, B MANDAL, BK CHEN, L TI NONLINEAR-OPTICAL PROPERTIES OF A NEW PORPHYRIN-CONTAINING POLYMER SO MACROMOLECULES LA English DT Note ID METAL DERIVATIVES; PHTHALOCYANINE C1 IIT,DEPT CHEM,CHICAGO,IL 60616. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 23 TC 19 Z9 19 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUL 31 PY 1995 VL 28 IS 16 BP 5681 EP 5683 DI 10.1021/ma00120a040 PG 3 WC Polymer Science SC Polymer Science GA RM940 UT WOS:A1995RM94000040 ER PT J AU WILSON, JR BUSH, CE DARROW, D HOSEA, JC JAEGER, EF MAJESKI, R MURAKAMI, M PHILLIPS, CK ROGERS, JH SCHILLING, G STEVENS, JE SYNAKOWSKI, E TAYLOR, G AF WILSON, JR BUSH, CE DARROW, D HOSEA, JC JAEGER, EF MAJESKI, R MURAKAMI, M PHILLIPS, CK ROGERS, JH SCHILLING, G STEVENS, JE SYNAKOWSKI, E TAYLOR, G TI ION-CYCLOTRON RANGE OF FREQUENCY HEATING OF A DEUTERIUM-TRITIUM PLASMA VIA THE 2ND-HARMONIC TRITIUM CYCLOTRON-RESONANCE SO PHYSICAL REVIEW LETTERS LA English DT Article ID TOKAMAKS AB Experiments have been performed on the TFTR to study rf wave heating of a D-T plasma by way of the second-harmonic tritium cyclotron resonance. The addition of tritium ions to a deuterium plasma allows for absorption of the rf waves at the tritium cyclotron harmonics and by electron damping of a mode converted ion Bernstein wave. Competing mechanisms include direct electron damping and damping at the fundamental cyclotron resonance of deuterium, alpha particles, and He-3 ions. The contribution of each is estimated from a series of plasma discharges where various plasma parameters are varied. The majority of the rf power is found to damp on the tritium ions. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP WILSON, JR (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 8 TC 27 Z9 27 U1 3 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 31 PY 1995 VL 75 IS 5 BP 842 EP 845 DI 10.1103/PhysRevLett.75.842 PG 4 WC Physics, Multidisciplinary SC Physics GA RL707 UT WOS:A1995RL70700018 ER PT J AU FISHER, RK MCCHESNEY, JM PARKS, PB DUONG, HH MEDLEY, SS ROQUEMORE, AL MANSFIELD, DK BUDNY, RV PETROV, MP OLSON, RE AF FISHER, RK MCCHESNEY, JM PARKS, PB DUONG, HH MEDLEY, SS ROQUEMORE, AL MANSFIELD, DK BUDNY, RV PETROV, MP OLSON, RE TI MEASUREMENTS OF FAST CONFINED ALPHAS ON TFTR SO PHYSICAL REVIEW LETTERS LA English DT Article ID PELLET INJECTION; ABLATION; PARTICLES; TOKAMAK; FIELD AB This Letter reports the first measurements of the fast confined alpha-particle energy distribution in a fusion plasma. The pellet charge exchange technique shows the fusion generated alpha's in the core of the Tokamak Fusion Test Reactor plasma slow down classically, and appear to be well confined. Preliminary indications are that stochastic ripple effects are responsible for steepening the energy distribution outside the plasma core (r/a greater than or similar to 0.35). Sawteeth mixing of fast alpha's is suggested in data during the post-beam-heating plasma decay. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA. UNIV MISSOURI,ROLLA,MO 65401. RP FISHER, RK (reprint author), GEN ATOM CO,SAN DIEGO,CA 92186, USA. NR 32 TC 62 Z9 63 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 31 PY 1995 VL 75 IS 5 BP 846 EP 849 DI 10.1103/PhysRevLett.75.846 PG 4 WC Physics, Multidisciplinary SC Physics GA RL707 UT WOS:A1995RL70700019 ER PT J AU HAMILTON, JC FOILES, SM AF HAMILTON, JC FOILES, SM TI MISFIT DISLOCATION-STRUCTURE FOR CLOSE-PACKED METAL-METAL INTERFACES SO PHYSICAL REVIEW LETTERS LA English DT Article ID COMMENSURATE-INCOMMENSURATE TRANSITION; KRYPTON MONOLAYERS; RECONSTRUCTION; AU(111); GRAPHITE; SURFACE; DOMAINS AB We describe theoretical calculations applying a 2D Frenkel-Kontorova (FK) model to the heteroepitaxial system Cu on Ru(1000). The experimentally observed variation of structure with layer thickness is simulated by scaling the adatom-adatom interaction. The minimum energy configurations are in exceptional agreement with recent scanning tunneling microscopy results showing four distinct structures as a function of thickness. These metal on metal films present a new realization of the FK model which complements previous investigations of rare gas adsorption on graphite. RP HAMILTON, JC (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94550, USA. OI Foiles, Stephen/0000-0002-1907-454X NR 16 TC 60 Z9 60 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 31 PY 1995 VL 75 IS 5 BP 882 EP 885 DI 10.1103/PhysRevLett.75.882 PG 4 WC Physics, Multidisciplinary SC Physics GA RL707 UT WOS:A1995RL70700028 ER PT J AU MCHUGH, PR RAMSHAW, JD AF MCHUGH, PR RAMSHAW, JD TI DAMPED ARTIFICIAL COMPRESSIBILITY ITERATION SCHEME FOR IMPLICIT CALCULATIONS OF UNSTEADY INCOMPRESSIBLE-FLOW SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS LA English DT Article DE INCOMPRESSIBLE FLOW; ARTIFICIAL COMPRESSIBILITY; ARTIFICIAL BULK VISCOSITY ID NAVIER-STOKES EQUATIONS; PSEUDOCOMPRESSIBILITY METHOD; FOURIER-ANALYSIS AB Peyret (J. Fluid Mech., 78, 49-63 (1976)) and others have described artificial compressibility iteration schemes for solving implicit time discretizations of the unsteady incompressible Navier-Stokes equations. Such schemes solve the implicit equations by introducing derivatives with respect to a pseudo-time variable tau and marching out to a steady state in tau. The pseudo-time evolution equation for the pressure p takes the form partial derivative p/partial derivative tau = -a(2) del . u, where a is an artificial compressibility parameter and u is the fluid velocity vector. We present a new scheme of this type in which convergence is accelerated by a new procedure for setting a and by introducing an artificial bulk viscosity b into the momentum equation. This scheme is used to solve the non-linear equations resulting from a fully implicit time differencing scheme for unsteady incompressible flow. We find that the best values of a and b are generally quite different from those in the analogous scheme for steady flow (J. D. Ramshaw and V. A. Mousseau, Comput. Fluids, 18, 361-367 (1990)), owing to the previously unrecognized fact that the character of the system is profoundly altered by the presence of the physical time derivative terms. In particular, a Fourier dispersion analysis shows that a no longer has the significance of a wave speed for finite values of the physical time step Delta t. Indeed, if one sets a similar to \u\ as usual, the artificial sound waves cease to exist when Delta t is small and this adversely affects the iteration convergence rate. Approximate analytical expressions for a and b are proposed and the benefits of their use relative to the conventional values a similar to \u\ and b = 0 are illustrated in simple test calculations. RP MCHUGH, PR (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 23 TC 4 Z9 4 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0271-2091 J9 INT J NUMER METH FL JI Int. J. Numer. Methods Fluids PD JUL 30 PY 1995 VL 21 IS 2 BP 141 EP 153 DI 10.1002/fld.1650210205 PG 13 WC Computer Science, Interdisciplinary Applications; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas SC Computer Science; Mathematics; Mechanics; Physics GA RH922 UT WOS:A1995RH92200004 ER PT J AU GEHLSEN, MD WEIMANN, PA BATES, FS HARVILLE, S MAYS, JW WIGNALL, GD AF GEHLSEN, MD WEIMANN, PA BATES, FS HARVILLE, S MAYS, JW WIGNALL, GD TI SYNTHESIS AND CHARACTERIZATION OF POLY(VINYLCYCLOHEXANE) DERIVATIVES SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS LA English DT Article DE POLYMER HYDROGENATION; POLY(VINYLCYCLOHEXANE) DERIVATIVE ID DIBLOCK COPOLYMERS; POLYMERS; HYDROGENATION; BEHAVIOR; MODEL AB Six nearly monodisperse substituted poly(styrene) homopolymers, poly(styrene) (PS), poly(2-methylstyrene) (P2MS), poly(3-methylstyrene) (P3MS), poly(4-methylstyrene) (P4MS), poly(tertiary-butylstyrene) (PtBS), and poly(alpha-methylstyrene) (P alpha MS) were anionically polymerized and subsequently saturated using heterogeneous hydrogenation techniques to poly(vinylcyclohexane) (PVCH), poly(2-methylvinylcyclohexane) (P2MVCH), poly(3-methylvinylcyclohexane) (P3MVCH), poly (4-methylvinylcyclohexane) (P4MVCH), and poly(tertiary-butylvinylcyclohexane) (PtBVCH), respectively. In each case, except P alpha MS, the materials were saturated to > 99% conversion with no chain degradation. PS hydrogenations required the addition of small amounts of tetrahydrofuran to the reaction solvent cyclohexane to enhance miscibility and eliminate large-scale chain degradation. Density gradient and differential scanning calorimetry (DSC) measurements were used to characterize the density and glass transition temperature, T-g, of the unsaturated and saturated polymers. Saturation reduces the density by 3% to 11% and changes T-g substantially. The greatest variation in T-g is obtained with the 3-methyl substituted species where a 63 degrees C increase is observed, while the highest measured T-g is 186 degrees C for P2MVCH. Small-angle neutron scattering (SANS) experiments on binary mixtures of hydrogenous and deuterium labeled PVCH derivatives provided a determination of bulk chain statistics. The statistical segment length is relatively insensitive to vinylcyclohexane ring substitution, except with P3MVCH where a 20% greater value is obtained. (C) 1995 John Wiley & Sons, Inc. C1 UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455. UNIV ALABAMA,DEPT CHEM,BIRMINGHAM,AL 35294. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. OI Wignall, George/0000-0002-3876-3244 NR 32 TC 34 Z9 36 U1 1 U2 14 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-6266 J9 J POLYM SCI POL PHYS JI J. Polym. Sci. Pt. B-Polym. Phys. PD JUL 30 PY 1995 VL 33 IS 10 BP 1527 EP 1536 DI 10.1002/polb.1995.090331010 PG 10 WC Polymer Science SC Polymer Science GA RC148 UT WOS:A1995RC14800010 ER PT J AU LIN, BC YUN, T ZHONG, GM GUIOCHON, G AF LIN, BC YUN, T ZHONG, GM GUIOCHON, G TI SHOCK LAYER ANALYSIS FOR A SINGLE-COMPONENT IN PREPARATIVE ELUTION CHROMATOGRAPHY SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article ID LIQUID-CHROMATOGRAPHY; NONLINEAR CHROMATOGRAPHY; EXCHANGE SYSTEMS; PEAK PROFILES; IDEAL MODEL; EQUILIBRIUM; PERFORMANCE; THICKNESS; BAND AB The onset of the nonlinear behavior of band profiles in elution chromatography is investigated by studying the profile of the shock layer caused by a finite mass transfer resistance in the absence of axial dispersion for a single component. A closed-form analytical expression of the shock layer is obtained for a parabolic isotherm. This solution depends on a dimensionless number which may be used to characterize the degree of nonlinear behavior of the band profiles and to select the model most appropriate for their accurate description. The profiles resulting from this solution are compared with those obtained by numerical calculations under different conditions to assess the influence of the assumptions made. The differences observed illustrate the sensitivity of the elution profiles to small changes in the equilibrium isotherm. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996. NR 31 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD JUL 28 PY 1995 VL 708 IS 1 BP 1 EP 12 DI 10.1016/0021-9673(95)00380-6 PG 12 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RN200 UT WOS:A1995RN20000001 ER PT J AU REINHOLD, CO BURGDORFER, J JONES, RR RAMAN, C BUCKSBAUM, PH AF REINHOLD, CO BURGDORFER, J JONES, RR RAMAN, C BUCKSBAUM, PH TI SCALED-TIME DYNAMICS OF IONIZATION OF RYDBERG STARK STATES BY HALF-CYCLE PULSES SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Letter ID ELECTROMAGNETIC PULSES; HYDROGEN-ATOM AB We study the time dependence of the ionization of Stark Rydberg states of hydrogen subject to half-cycle electromagnetic pulses. We find that the quantum ionization probability for the most 'blue-shifted' Stark state exhibits a purely classical oscillating pattern as a function of time whose frequency is associated with the perturbed orbital frequency of the electron. We show that these oscillations could be observed experimentally when a scaled-time analysis of ionization data for hydrogen is employed. Our calculations are compared with experimental data for sodium. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901. UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109. RP REINHOLD, CO (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. OI Reinhold, Carlos/0000-0003-0100-4962 NR 24 TC 25 Z9 25 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD JUL 28 PY 1995 VL 28 IS 14 BP L457 EP L464 DI 10.1088/0953-4075/28/14/002 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA RM971 UT WOS:A1995RM97100002 ER PT J AU BERMAN, A AHN, DJ LIO, A SALMERON, M REICHERT, A CHARYCH, D AF BERMAN, A AHN, DJ LIO, A SALMERON, M REICHERT, A CHARYCH, D TI TOTAL ALIGNMENT OF CALCITE AT ACIDIC POLYDIACETYLENE FILMS - COOPERATIVITY AT THE ORGANIC-INORGANIC INTERFACE SO SCIENCE LA English DT Article ID LANGMUIR MONOLAYERS; WATER-INTERFACE; CRYSTALS; GROWTH; PHASE; BIOMINERALIZATION; MULTILAYERS; MORPHOLOGY; MICROSCOPY AB Biological matrices can direct the absolute alignment of inorganic crystals such as calcite. Cooperative effects at an organic-inorganic interface resulted in similar co-alignment of calcite at polymeric Langmuir-Schaefer films of 10,12-pentacosadiynoic acid (p-PDA). The films nucleated calcite at the (012) face, and the crystals were co-aligned with respect to the polymer's conjugated backbone. At the same time, the p-PDA alkyl side chains reorganized to optimize the stereochemical fit to the calcite structure, as visualized by changes in the optical spectrum of the polymer. These results indicate the kinds of interactions that may occur in biological systems where large arrays of crystals are co-aligned. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. RI Berman, Amir/F-1870-2012 NR 35 TC 226 Z9 232 U1 4 U2 46 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JUL 28 PY 1995 VL 269 IS 5223 BP 515 EP 518 DI 10.1126/science.269.5223.515 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RL495 UT WOS:A1995RL49500019 PM 17842362 ER PT J AU MCGIBBON, AJ PENNYCOOK, SJ ANGELO, JE AF MCGIBBON, AJ PENNYCOOK, SJ ANGELO, JE TI DIRECT OBSERVATION OF DISLOCATION CORE STRUCTURES IN CDTE/GAAS(001) SO SCIENCE LA English DT Article ID SEMICONDUCTORS; INTERFACES; GERMANIUM; SILICON; SI AB A strategy is presented for determining sublattice polarity at defects in compound semiconductors. Core structures of 60-degree and Lomer dislocations in the CdTe/GaAs(001) system have been obtained by the application of maximum-entropy analysis to Z-contrast images (Z is atomic number) obtained in a 300-kilovolt scanning transmission electron microscope. Sixty-degree dislocations were observed to be of the glide type, whereas in the case of Lomer dislocations, both a symmetric (Hornstra-like) core and an unexpected asymmetric structure made up of a fourfold ring were seen. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. SANDIA NATL LABS,LIVERMORE,CA 94550. NR 23 TC 66 Z9 67 U1 2 U2 33 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JUL 28 PY 1995 VL 269 IS 5223 BP 519 EP 521 DI 10.1126/science.269.5223.519 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RL495 UT WOS:A1995RL49500020 PM 17842363 ER PT J AU BRADLEY, RA LANZENDORF, E MCCARTHY, MI ORLANDO, TM HESS, WP AF BRADLEY, RA LANZENDORF, E MCCARTHY, MI ORLANDO, TM HESS, WP TI MOLECULAR NO DESORPTION FROM CRYSTALLINE-SODIUM NITRATE BY RESONANT EXCITATION OF THE NO3- PI-PI-ASTERISK TRANSITION SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PHOTON-STIMULATED DESORPTION; EXCITED-ATOM PRODUCTION; ENHANCED MPI SPECTRA; ALKALI-HALIDES; ELECTRON-BOMBARDMENT; KNUDSEN-LAYER; ENERGY; ION; DISTRIBUTIONS; DEPENDENCE AB We have studied the laser desorption of NO from single crystal sodium nitrate following pulsed 213-nm excitation of the pi* <-- pi(2) absorption band localized on the nitrate anion. The excitation laser flux is maintained at low levels (<2 MW/cm(2)) to obtain product distributions free of secondary interactions following fragment ejection from the crystal surface. At low fluence, the NO photodesorption yield is found to be linear with desorption laser power indicating that single-photon absorption events lead to fragment ejection. The desorption yield is enhanced by roughly a factor of 1000 for resonant excitation (213 nm) over nonresonant excitation (266 nm) on a per-photon basis. We determine the relative vibrational, rotational, and translational energy distributions of the neutral NO photoproducts. Significant population in vibrational levels up to upsilon('') = 4 is observed and translational distributions for the upsilon('') = 0-3 levels are determined. Rotational state populations and translational energy distributions are well characterized by thermal distributions at the substrate temperature. A local excitation mechanism for NO desorption following resonant excitation is proposed. Under these experimetnal conditions the resonant desorption process (213 nm) is dominated by the photochemistry of the surface nitrate ions. A model for the absorption/dissociation mechanism is proposed that differs from that reported for gas phase ions in that it accounts for the stabilization of the ions due to the crystalline field. The role of exciton migration following resonant excitation is also discussed. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. OPT COATINGS LAB INC, SANTA ROSA, CA 95407 USA. NR 42 TC 26 Z9 26 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 27 PY 1995 VL 99 IS 30 BP 11715 EP 11721 DI 10.1021/j100030a015 PG 7 WC Chemistry, Physical SC Chemistry GA RL783 UT WOS:A1995RL78300015 ER PT J AU SMITH, AG DAGNALL, PJ LISLE, JC SMALLEY, DH WERNER, TR CHAPMAN, R FINCK, C HAAS, B LEDDY, M NAZAREWICZ, W PREVOST, D ROWLEY, N SAVAJOLS, H AF SMITH, AG DAGNALL, PJ LISLE, JC SMALLEY, DH WERNER, TR CHAPMAN, R FINCK, C HAAS, B LEDDY, M NAZAREWICZ, W PREVOST, D ROWLEY, N SAVAJOLS, H TI OBSERVATION OF SUPERDEFORMATION IN SR-82 SO PHYSICS LETTERS B LA English DT Article ID SHAPE COEXISTENCE; NUCLEI AB The EUROGAM Phase 2 array has been used to detect gamma rays following the reaction of Si-30 on Ni-58 at 134 MeV. Two rotational cascades exhibiting characteristic superdeformed behaviour have been observed in Sr-82, Cranked Woods-Saxon calculations have been performed and these suggest that both bands have the, v5(2) pi 5(1) intrinsic intruder configuration and that they differ in the signature component of the [431]1/2 proton orbital which is occupied. C1 UNIV STRASBOURG 1,IN2P3,CTR RECH NUCL,CNRS,F-67037 STRASBOURG,FRANCE. UNIV PAISLEY,DEPT PHYS,PAISLEY PA1 2BE,RENFREW,SCOTLAND. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. UNIV WARSAW,INST THEORET PHYS,PL-00681 WARSAW,POLAND. RP SMITH, AG (reprint author), UNIV MANCHESTER,DEPT PHYS & ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. NR 11 TC 17 Z9 17 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 JUL 27 PY 1995 VL 355 IS 1-2 BP 32 EP 36 DI 10.1016/0370-2693(95)00735-4 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RM731 UT WOS:A1995RM73100006 ER PT J AU GAILLARD, MK MURAYAMA, H OLIVE, KA AF GAILLARD, MK MURAYAMA, H OLIVE, KA TI PRESERVING FLAT DIRECTIONS DURING INFLATION SO PHYSICS LETTERS B LA English DT Article ID SUPERSTRING-INSPIRED MODELS; EFFECTIVE FIELD-THEORIES; NO-SCALE SUPERGRAVITY; YANG-MILLS THEORIES; LINEAR SIGMA-MODEL; SUPERSYMMETRY BREAKING; COSMOLOGICAL CONSTANT; DIMENSIONAL REDUCTION; PRIMORDIAL INFLATION; LOCAL SUPERSYMMETRY AB Supersymmetry is generally broken by the non-vanishing vacuum energy density present during inflation. In supergravity models, such a source of supersymmetry breaking typically makes a contribution to scalar masses of order m(-2) similar to H-2, where H-2 similar to V/M(p)(2) is the Hubble parameter during inflation. We show that in supergravity models which possess a Heisenberg symmetry, supersymmetry breaking makes no contribution to scalar masses, leaving supersymmetric flat directions flat at tree-level, One-loop corrections in general lift the flat directions, but naturally give small negative squared masses similar to -g(2)H(2)/(4 pi)(2) for, all flat directions that do not involve the stop. No-scale supergravity of the SU(N, 1) type and the untwisted sectors from orbifold compactifications are special cases of this general set of models. We point out the importance of the preservation of flat directions for baryogenesis. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455. RP GAILLARD, MK (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT PHYS,BERKELEY,CA 94720, USA. RI Murayama, Hitoshi/A-4286-2011; OI Olive, Keith/0000-0001-7201-5998 NR 63 TC 142 Z9 143 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 JUL 27 PY 1995 VL 355 IS 1-2 BP 71 EP 77 DI 10.1016/0370-2693(95)00773-E PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RM731 UT WOS:A1995RM73100012 ER PT J AU MURAYAMA, H AF MURAYAMA, H TI STUDYING NON-CALCULABLE MODELS OF DYNAMICAL SUPERSYMMETRY BREAKING SO PHYSICS LETTERS B LA English DT Article AB There are supersymmetric gauge theories which do not possess any parameters nor flat directions, and hence they cannot be studied anywhere in the field space using holomorphy (''non-calculable''). Some of them are believed to break supersymmetry dynamically. We propose a simple technique to analyze these models. Introducing a vector-like field into the model, one finds flat directions where one can study the dynamics, We unambiguously show that the supersymmetry is broken when the mass of the vector-like field is small but finite, and hence the Witten index vanishes, If we increase the mass of the vector-like field, it eventually decouples from the dynamics and the models reduce to the original non-calculable models. Assuming continuity of the Witten index in the parameter space, one can establish dynamical supersymmetry breaking in the non-calculable models. RP MURAYAMA, H (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720, USA. RI Murayama, Hitoshi/A-4286-2011 NR 16 TC 62 Z9 62 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 JUL 27 PY 1995 VL 355 IS 1-2 BP 187 EP 192 DI 10.1016/0370-2693(95)00744-6 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RM731 UT WOS:A1995RM73100027 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHIERICI, R CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, WE DEFOIX, C RICCA, GD DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIBBS, M GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HUET, K HULTQVIST, K IOANNOU, P JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MIAGKOV, A MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIEUWENHUIZEN, M NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOKOLOV, A SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TOET, DZ TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V WAHLEN, H WALCK, C WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G AF ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALVSVAAG, SJ AMALDI, U AMATO, S ANDREAZZA, A ANDRIEUX, ML ANTILOGUS, P APEL, WD ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BAUDOT, J BECKS, KH BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUGGE, L BURAN, T BUYS, A CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CANEPA, M CANKOCAK, K CAO, F CARENA, F CARRILHO, P CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHIERICI, R CHOCHULA, P CHOROWICZ, V CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSSUTTI, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S DAHLJENSEN, E DAHM, J DALMAGNE, B DAM, M DAMGAARD, G DAUM, A DAUNCEY, PD DAVENPORT, M DASILVA, WE DEFOIX, C RICCA, GD DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S DECLERCQ, C DELAVAISSIERE, C DELOTTO, B DEMIN, A DEPAULA, L DESAINTJEAN, C DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DREES, KA DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EHRET, R EIGEN, G EKELOF, T EKSPONG, G ELSING, M ENGEL, JP ERSHAIDAT, N ERZEN, B SANTO, ME FALK, E FASSOULIOTIS, D FEINDT, M FENYUK, A FERRER, A FILIPPAS, TA FIRESTONE, A FISCHER, PA FOETH, H FOKITIS, E FONTANELLI, F FORMENTI, F FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURSTENAU, H FUSTER, J GALLONI, A GAMBA, D GANDELMAN, M GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GELE, D GERBER, JP GIBBS, M GILLESPIE, D GOKIELI, R GOLOB, B GOPAL, G GORN, L GORSKI, M GOUZ, Y GRACCO, V GRAZIANI, E GROSDIDIER, G GUNNARSSON, P GUNTHER, M GUY, J HAEDINGER, U HAHN, F HAHN, M HAHN, S HAJDUK, Z HALLGREN, A HAMACHER, K HAO, W HARRIS, FJ HEDBERG, V HENRIQUES, R HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIGON, E HILKE, HJ HILL, TS HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HOULDEN, M HUET, K HULTQVIST, K IOANNOU, P JACKSON, JN JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L JONSSON, P JORAM, C JUILLOT, P KAISER, M KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A KATSANEVAS, S KATSOUFIS, EC KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMSA, JW LANCERI, L LANE, DW LANGEFELD, P LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEFEBURE, V LEGAN, CK LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LIKO, D LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZ, JM LOPEZFERNANDEZ, A AGUERA, MAL LOUKAS, D LUTZ, P LYONS, L MACNAUGHTON, J MAEHLUM, G MAIO, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SM MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MERONI, C MEYER, WT MIAGKOV, A MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIM, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S NEGRI, P NEMECEK, S NEUMANN, W NEUMEISTER, N NICOLAIDOU, R NIELSEN, BS NIEUWENHUIZEN, M NIKOLAENKO, V NISS, P NOMEROTSKI, A NORMAND, A OBERSCHULTEBECKMANN, W OBRAZTSOV, V OLSHEVSKI, AG ONOFRE, A ORAVA, R OSTERBERG, K OURAOU, A PAGANINI, P PAGANONI, M PAGES, P PALKA, H PAPADOPOULOU, TD PAPE, L PARKES, C PARODI, F PASSERI, A PEGORARO, M PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PREST, M PRIVITERA, P PUKHAEVA, N PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REALE, M REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEDYKH, Y SEGAR, AM SEITZ, A SEKULIN, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SITAR, B SKAALI, TB SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOKOLOV, A SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, I STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TOET, DZ TOMARADZE, A TOME, B TORTORA, L TRANSTROMER, G TREILLE, D TRISCHUK, W TRISTRAM, G TROMBINI, A TRONCON, C TSIROU, A TURLUER, ML TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O VALENTI, G VALLAZZA, E VELDE, CV VANAPELDOORN, GW VANDAM, P VANELDIK, J VASSILOPOULOS, N VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VRBA, V WAHLEN, H WALCK, C WEHR, A WEIERSTALL, M WEILHAMMER, P WETHERELL, AM WICKE, D WICKENS, JH WIELERS, M WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WOSCHNAGG, K YIP, K YUSHCHENKO, O ZACH, F ZACHARATOU, C ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G TI OBSERVATION OF SHORT-RANGE 3-PARTICLE CORRELATIONS IN E(+)E(-) ANNIHILATIONS AT LEP ENERGIES SO PHYSICS LETTERS B LA English DT Article ID BOSE-EINSTEIN CORRELATIONS; LUND MONTE-CARLO; HADRONIC Z0 DECAYS; JET FRAGMENTATION; E+E ANNIHILATION; COLLISIONS; PHYSICS; Z(0) AB Measurements are presented of short range three-particle correlations in e(+)e(-) annihilations at LEP using data collected by the DELPHI detector. At small values of the four-momentum difference, strong three-particle correlations are observed for like-sign (+++ and ---) and for unlike-sign (++- and +--) pion combinations which are not a consequence of two-particle correlations. A possible explanation of the observed effects in like-sign combinations is the existence of higher order Bose-Einstein interference, which significantly changes the particle distributions in jets. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV INSTELLING ANTWERP, DEPT PHYS, B-2610 WILRIJK, BELGIUM. FREE UNIV BRUSSELS, IIHE, B-1050 BRUSSELS, BELGIUM. UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV BERGEN, DEPT PHYS, N-5007 BERGEN, NORWAY. UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. CTR BRASILEIRO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL. UNIV ESTADUAL RIO DE JANEIRO, INST FIS, RIO DE JANEIRO, BRAZIL. COMENIUS UNIV BRATISLAVA, FAC MATH & PHYS, BRATISLAVA 84215, SLOVAKIA. COLL FRANCE, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-75231 PARIS 05, FRANCE. CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV STRASBOURG 1, CNRS, IN2P3, CTR RECH NUCL, F-67037 STRASBOURG, FRANCE. NCSR DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. ACAD SCI CZECH REPUBL, INST PHYS, FZU, DIV HIGH ENERGY PHYS, CR-18040 PRAGUE 8, CZECH REPUBLIC. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. IST NAZL FIS NUCL, I-16146 GENOA, ITALY. UNIV GRENOBLE 1, INST SCI NUCL, CNRS, IN2P3, F-38026 ST MARTIN DHERES, FRANCE. SEFT, HIGH ENERGY PHYS RES INST, SF-00014 HELSINKI, FINLAND. JOINT INST NUCL RES DUBNA, MOSCOW 101000, RUSSIA. UNIV KARLSRUHE, INST EXPTL KERNPHYS, D-76128 KARLSRUHE, GERMANY. INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, CNRS, IN2P3, F-91405 ORSAY, FRANCE. UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND. UNIV PARIS 06, LPNHE, CNRS, IN2P3, F-75252 PARIS, FRANCE. UNIV PARIS 07, F-75252 PARIS, FRANCE. LUND UNIV, DEPT PHYS, S-22363 LUND, SWEDEN. UNIV LYON 1, IPNL, CNRS, IN2P3, F-69622 VILLEURBANNE, FRANCE. UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN. UNIV AIX MARSEILLE 2, CPP, CNRS, IN2P3, F-13288 MARSEILLE 09, FRANCE. UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK. CHARLES UNIV, NUCL CTR MFF, AREAL MFF, CR-18000 PRAGUE 8, CZECH REPUBLIC. NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV OVIEDO, DEPT FIS, E-33006 OVIEDO, SPAIN. UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY. IST NAZL FIS NUCL, I-35131 PADUA, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV ROMA TOR VERGATA, DIPARTIMENTO FIS, I-00173 ROME, ITALY. IST NAZL FIS NUCL, I-00173 ROME, ITALY. DAPNIA, DSM, CTR ETUD SACLAY, F-91191 GIF SUR YVETTE, FRANCE. IST NAZL FIS NUCL, IST SUPER SANITA, I-00161 ROME, ITALY. UNIV CANTABRIA, CSIC, CEAFM, E-39006 SANTANDER, SPAIN. INST HIGH ENERGY PHYS, PROTVINO, RUSSIA. UNIV LJUBLJANA, JOZEF STEFAN INST, LJUBLJANA 61000, SLOVENIA. UNIV LJUBLJANA, DEPT PHYS, LJUBLJANA 61000, SLOVENIA. UNIV STOCKHOLM, S-11385 STOCKHOLM, SWEDEN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. UNIV FED RIO DE JANEIRO, BR-21945970 RIO DE JANEIRO, BRAZIL. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. VALENCIA CSIC, IFIC, E-46100 BURJASSOT, SPAIN. UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN. OSTERR AKAD WISSENSCH, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. UNIV WARSAW, PL-00681 WARSAW, POLAND. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WUPPERTAL, FACHBEREICH PHYS, D-42097 WUPPERTAL 1, GERMANY. RP UNIV LISBON, IST, LIP, AV ELIAS GARCIA, P-1000 LISBON, PORTUGAL. RI de Paula, Leandro/I-9278-2012; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Krammer, Manfred/A-6508-2010; De Saint Jean, Cyrille/E-8853-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Fruhwirth, Rudolf/H-2529-2012; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Navas, Sergio/N-4649-2014; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; Ferrer, Antonio/H-2942-2015; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Della Ricca, Giuseppe/B-6826-2013; Olshevskiy, Alexander/I-1580-2016; Rames, Jiri/H-2450-2014; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Mundim, Luiz/A-1291-2012; Yip, Kin/D-6860-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Nemecek, Stanislav/G-5931-2014; Ridky, Jan/H-6184-2014; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014 OI de Paula, Leandro/0000-0002-4984-7734; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Ruiz, Alberto/0000-0002-3639-0368; Krammer, Manfred/0000-0003-2257-7751; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Navas, Sergio/0000-0003-1688-5758; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368; Espirito Santo, Maria Catarina/0000-0003-1286-7288; Pimenta, Mario/0000-0002-2590-0908; Ragazzi, Stefano/0000-0001-8219-2074; Ferrer, Antonio/0000-0003-0532-711X; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Della Ricca, Giuseppe/0000-0003-2831-6982; Olshevskiy, Alexander/0000-0002-8902-1793; Dracos, Marcos/0000-0003-0514-193X; Mundim, Luiz/0000-0001-9964-7805; Yip, Kin/0000-0002-8576-4311; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Tome, Bernardo/0000-0002-7564-8392; NR 30 TC 43 Z9 43 U1 0 U2 6 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 JUL 27 PY 1995 VL 355 IS 1-2 BP 415 EP 424 DI 10.1016/0370-2693(95)00711-S PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RM731 UT WOS:A1995RM73100060 ER PT J AU AMSLER, C ARMSTRONG, DS BAKER, CA BARNETT, BM BATTY, CJ BENAYOUN, M BEUCHERT, K BIRIEN, P BLUM, P BOSSINGHAM, R BRAUNE, K BROSE, J BUGG, DV CASE, T CHUNG, SU COOPER, AR CRAMER, O CROWE, KM DEGENER, T DIETZ, HP DJAOSHVILI, N VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C GIARRITTA, P HACKMAN, R HADDOCK, RP HEINSIUS, FH HERZ, M HESSEY, NP HIDAS, P HOLZHAUSEN, C ILLINGER, P JAMNIK, D KALINOWSKY, H KALTEYER, B KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOCH, H KOBEL, M KOLO, C KUNZE, M LAKATA, M LANDUA, R LUDEMANN, J MATTHAY, H MCCRADY, R MERLO, JP MEYER, CA MONTANET, L NOBLE, A OUARED, R OULDSAADA, F PETERS, K PINDER, CN PINTER, G RAVNDAL, S REGENFUS, C SCHAFER, E SCHMIDT, P SCHUTRUMPF, M SEIBERT, R SPANIER, S STOCK, H STRASSBURGER, C STROHBUSCH, U SUFFERT, M THOMA, U TISCHHAUSER, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U WINTER, N ZOLL, J ZOU, BS ZUPANCIC, C AF AMSLER, C ARMSTRONG, DS BAKER, CA BARNETT, BM BATTY, CJ BENAYOUN, M BEUCHERT, K BIRIEN, P BLUM, P BOSSINGHAM, R BRAUNE, K BROSE, J BUGG, DV CASE, T CHUNG, SU COOPER, AR CRAMER, O CROWE, KM DEGENER, T DIETZ, HP DJAOSHVILI, N VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C GIARRITTA, P HACKMAN, R HADDOCK, RP HEINSIUS, FH HERZ, M HESSEY, NP HIDAS, P HOLZHAUSEN, C ILLINGER, P JAMNIK, D KALINOWSKY, H KALTEYER, B KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOCH, H KOBEL, M KOLO, C KUNZE, M LAKATA, M LANDUA, R LUDEMANN, J MATTHAY, H MCCRADY, R MERLO, JP MEYER, CA MONTANET, L NOBLE, A OUARED, R OULDSAADA, F PETERS, K PINDER, CN PINTER, G RAVNDAL, S REGENFUS, C SCHAFER, E SCHMIDT, P SCHUTRUMPF, M SEIBERT, R SPANIER, S STOCK, H STRASSBURGER, C STROHBUSCH, U SUFFERT, M THOMA, U TISCHHAUSER, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U WINTER, N ZOLL, J ZOU, BS ZUPANCIC, C TI COUPLED-CHANNEL ANALYSIS OF (P)OVER-BARP ANNIHILATION INTO PI(0)PI(0)PI(0), PI(0)ETA-ETA, AND PI(0)PI(0)ETA SO PHYSICS LETTERS B LA English DT Article ID THRESHOLD; SU(3); REST AB We confirm the existence of the two I-G(J(PC)) = O+(O++) resonances f(0)(1370) and f(0)(1500) reported by us in earlier analyses. The analysis presented here couples the final states pi(0) pi(0) pi(0), pi(0) pi(0) eta and pi(0) eta eta of ($) over bar pp annihilation at rest. It is based on a 3 x 3 K-matrix. We find masses and widths of M = (1390 +/- 30) MeV, Gamma = (380 +/- 80) MeV; and M = (1500 +/- 10) MeV, Gamma = (154 +/- 30) MeV, respectively. The product branching ratios for the production and decay into pi(0) pi(0) and eta eta of the f(0)(1500) are (1.27 +/- 0.33) . 10(-3) and (0.60 +/- 0.17) . 10(-3), respectively. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RUHR UNIV BOCHUM,D-44780 BOCHUM,GERMANY. UNIV BONN,INST STRAHLEN & KERNPHYS,D-53115 BONN,GERMANY. ACAD SCI BUDAPEST,H-1525 BUDAPEST,HUNGARY. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. CERN,CH-1211 GENEVA,SWITZERLAND. UNIV HAMBURG,D-22761 HAMBURG,GERMANY. UNIV KARLSRUHE,D-76021 KARLSRUHE,GERMANY. UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV MAINZ,D-55099 MAINZ,GERMANY. UNIV MUNICH,D-80333 MUNICH,GERMANY. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. RP AMSLER, C (reprint author), UNIV ZURICH,CH-8057 ZURICH,SWITZERLAND. RI Meyer, Curtis/L-3488-2014 OI Meyer, Curtis/0000-0001-7599-3973 NR 28 TC 158 Z9 158 U1 0 U2 3 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 JUL 27 PY 1995 VL 355 IS 1-2 BP 425 EP 432 DI 10.1016/0370-2693(95)00747-9 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RM731 UT WOS:A1995RM73100061 ER PT J AU ARCOT, SS FONTIUS, JJ DEININGER, PL BATZER, MA AF ARCOT, SS FONTIUS, JJ DEININGER, PL BATZER, MA TI IDENTIFICATION AND ANALYSIS OF A YOUNG POLYMORPHIC ALU ELEMENT SO BIOCHIMICA ET BIOPHYSICA ACTA-GENE STRUCTURE AND EXPRESSION LA English DT Note DE REPETITIVE DNA; PRIMATE; PCR; SOMATIC CELL HYBRID ID REPEATED SEQUENCES; FAMILY MEMBERS; EVOLUTION; INSERTION; RETROPOSONS; SUBFAMILY AB A polymorphic Alu element belonging to a young subfamily of Alu repeats has been identified. Sequence analysis showed that this Alu element is flanked by perfect direct repeats and a 3' oligo(dA)-rich tail, The Alu element, designated A25, is deleted by 34 nucleotides at the 5' end and has a single CpG mutation compared to the human-specific consensus sequence. Using a PCR-based assay, we demonstrated that the A25 Alu repeat is localized to human chromosome 8 and is polymorphic in humans. C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. LOUISIANA STATE UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,NEW ORLEANS,LA 70112. ALTON OCHSNER MED FDN & OCHSNER CLIN,MOLEC GENET LAB,NEW ORLEANS,LA 70121. OI Deininger, Prescott/0000-0002-1067-3028 FU NHGRI NIH HHS [HG 00770] NR 24 TC 41 Z9 41 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-4781 J9 BBA-GENE STRUCT EXPR JI Biochim. Biophys. Acta-Gene Struct. Expression PD JUL 25 PY 1995 VL 1263 IS 1 BP 99 EP 102 DI 10.1016/0167-4781(95)00080-Z PG 4 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA RM120 UT WOS:A1995RM12000018 PM 7632743 ER PT J AU JACOBS, JW JENKINS, DG KLEIN, DL BENJAMIN, RF AF JACOBS, JW JENKINS, DG KLEIN, DL BENJAMIN, RF TI NONLINEAR GROWTH OF THE SHOCK-ACCELERATED INSTABILITY OF A THIN FLUID LAYER SO JOURNAL OF FLUID MECHANICS LA English DT Article ID RAYLEIGH-TAYLOR INSTABILITY; GAS; DYNAMICS; LIGHT AB Richtmyer-Meshkov instability causes spatially periodic perturbations initially imposed on a shock-accelerated, thin gas layer to develop into one of three distinct flow patterns. Planar laser-induced fluorescence imaging of the evolving layer, produced by a perturbed SF6 planar jet in air, shows an apparent flow bifurcation that is observed as mushroom-shaped or sinuous-shaped interfacial patterns. Analysis of this nonlinear instability growth, accomplished by modelling the flow field as a row of line vortices, predicts that the layer thickness grows logarithmically at later times and compares well with our measurements. Because the row of vortices is unstable, the model also provides an explanation for the appearance of the three observed interfacial patterns. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP JACOBS, JW (reprint author), UNIV ARIZONA,DEPT AEROSP & MECH ENGN,TUCSON,AZ 85721, USA. NR 35 TC 43 Z9 44 U1 0 U2 6 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD JUL 25 PY 1995 VL 295 BP 23 EP 42 DI 10.1017/S002211209500187X PG 20 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA RM816 UT WOS:A1995RM81600002 ER PT J AU CHOI, W AF CHOI, W TI NONLINEAR EVOLUTION-EQUATIONS FOR 2-DIMENSIONAL SURFACE-WAVES IN A FLUID OF FINITE DEPTH SO JOURNAL OF FLUID MECHANICS LA English DT Article ID GRAVITY-WAVES AB Two-dimensional weakly nonlinear surface gravity-capillary waves in an ideal fluid of finite water depth are considered and nonlinear evolution equations which are correct up to the third order of wave steepness are derived including the applied pressure on the free surface. Since no assumptions are made on the length scales, the equations can be applied to a fluid of arbitrary depth and to disturbances with arbitrary wavelength. For one-dimensional gravity waves, these evolution equations are reduced to those derived by Matsuno (1992). Most of the known equations for surface waves are recovered from the new set of equations as special cases. It is shown that one set of equations has a Hamiltonian formulation and conserves mass, momentum and energy. The analysis for irrotational flow is extended to two-dimensional uniform shear flow. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP CHOI, W (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 15 TC 34 Z9 34 U1 1 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD JUL 25 PY 1995 VL 295 BP 381 EP 394 DI 10.1017/S0022112095002011 PG 14 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA RM816 UT WOS:A1995RM81600016 ER PT J AU HU, J XIAO, XD SALMERON, M AF HU, J XIAO, XD SALMERON, M TI SCANNING POLARIZATION FORCE MICROSCOPY - A TECHNIQUE FOR IMAGING LIQUIDS AND WEAKLY ADSORBED LAYERS SO APPLIED PHYSICS LETTERS LA English DT Article ID CAPACITANCE MICROSCOPY; INSULATOR SURFACES; LOCALIZED CHARGE; RESOLUTION; CONTACT; POTENTIOMETRY; SILICON; SCALE; MICA AB The atomic force microscope is used to measure dielectric polarization forces on surfaces induced by a charged tip. On insulators, the major contribution to the surface polarizability at low frequencies is from surface ions. The mobility of these ions depends strongly on the humidity. Using polarization forces we have been able to image liquid films, droplets, and other weakly adsorbed material. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 26 TC 203 Z9 209 U1 3 U2 24 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 JUL 24 PY 1995 VL 67 IS 4 BP 476 EP 478 DI 10.1063/1.114541 PG 3 WC Physics, Applied SC Physics GA RK699 UT WOS:A1995RK69900010 ER PT J AU AHLE, L AKIBA, Y ASHKTORAB, K BAKER, M BEAVIS, D BRITT, HC CHANG, J CHASMAN, C CHEN, Z CHI, CY CHU, YY CIANCIOLO, V COLE, BA CRAWFORD, HJ CUMMING, JB DEBBE, R ELDREDGE, W ENGELAGE, J FUNG, SY GONIN, M GUSHUE, S HAMAGAKI, H HANSEN, LF HAYANO, RS HAYASHI, S HEINTZELMAN, G HOMMA, S JUDD, E KANEKO, H KANG, J KIM, EJ KUMAGAI, A KURITA, K LEE, JH LEVINE, MJ LIU, H LUKE, J MIAKE, Y MIGNEREY, A MOSKOWITZ, B MOULSON, M NAGAMIYA, S NAMBOODIRI, MN OGILVIE, C OLNESS, J REMSBERG, LP RYAN, J SAKO, H SANGSTER, TC SETO, R SHEA, J SHIGAKI, K SOLTZ, R STEADMAN, SG STEPHANS, GSF TANNENBAUM, MJ THOMAS, JH VIDEBAEK, F WANG, F WANG, Y WOODRUFF, D WU, Y XIANG, H XU, GH YAGI, K YANG, X ZAJC, WA ZHU, Q ZHU, F AF AHLE, L AKIBA, Y ASHKTORAB, K BAKER, M BEAVIS, D BRITT, HC CHANG, J CHASMAN, C CHEN, Z CHI, CY CHU, YY CIANCIOLO, V COLE, BA CRAWFORD, HJ CUMMING, JB DEBBE, R ELDREDGE, W ENGELAGE, J FUNG, SY GONIN, M GUSHUE, S HAMAGAKI, H HANSEN, LF HAYANO, RS HAYASHI, S HEINTZELMAN, G HOMMA, S JUDD, E KANEKO, H KANG, J KIM, EJ KUMAGAI, A KURITA, K LEE, JH LEVINE, MJ LIU, H LUKE, J MIAKE, Y MIGNEREY, A MOSKOWITZ, B MOULSON, M NAGAMIYA, S NAMBOODIRI, MN OGILVIE, C OLNESS, J REMSBERG, LP RYAN, J SAKO, H SANGSTER, TC SETO, R SHEA, J SHIGAKI, K SOLTZ, R STEADMAN, SG STEPHANS, GSF TANNENBAUM, MJ THOMAS, JH VIDEBAEK, F WANG, F WANG, Y WOODRUFF, D WU, Y XIANG, H XU, GH YAGI, K YANG, X ZAJC, WA ZHU, Q ZHU, F TI RECENT RESULTS FROM E866 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID NUCLEAR COLLISIONS AB The E866 experimental setup has been upgraded by addition of a forward spectrometer to handle the large multiplicities in central Au+Au collisions at AGS. Furthermore, new global detectors have been added to gain insight into the reaction dynamics and enable studies of flow effects. The report presents preliminary rapidity distributions for protons and produced mesons in central collisions. The shape of m(t)-spectra of pions is discussed. Examples of the measurements which can be done with a new multiplicity array are presented. C1 UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. COLUMBIA UNIV,NEW YORK,NY 10027. UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. YONSEI UNIV,SEOUL 120749,SOUTH KOREA. UNIV MARYLAND,COLLEGE PK,MD 20742. MIT,CAMBRIDGE,MA 02139. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92507. NEVIS LABS,IRVINGTON,NY 10533. UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN. KYOTO UNIV,SAKYO KU,KYOTO 606,JAPAN. RP AHLE, L (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Mignerey, Alice/D-6623-2011; Cumming, James/I-3358-2013; Hayano, Ryugo/F-7889-2012; HAMAGAKI, HIDEKI/G-4899-2014 OI Cumming, James/0000-0001-6930-0958; Hayano, Ryugo/0000-0002-1214-7806; NR 15 TC 19 Z9 19 U1 0 U2 2 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C249 EP C258 PG 10 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200019 ER PT J AU ALBRECHT, R AWES, TC BARLAG, C BERGER, F BLOOMER, M BLUME, C BOCK, D BOCK, R BOHNE, E BUCHER, D CLAESSON, G CLAUSSEN, A CLEWING, G DEBBE, R DRAGON, L EKLUND, A FOKIN, S GARPMAN, S GLASOW, R GUSTAFSSON, HA GUTBROD, HH HANSEN, O HOLKER, G IDH, J IPPOLITOV, M JACOBS, P KAMPERT, KH KARADJEV, K KOLB, BW LEBEDEV, A LOHNER, H LUND, I MANKO, V MOSKOWITZ, B OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PLASIL, F POSKANZER, AM PURSCHKE, M ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SODERSTROM, K SORENSEN, SP STANKUS, PW STEFFENS, K STEINHAEUSER, P STENLUND, E STUKEN, D VINOGRADOV, A WEGNER, H YOUNG, GR AF ALBRECHT, R AWES, TC BARLAG, C BERGER, F BLOOMER, M BLUME, C BOCK, D BOCK, R BOHNE, E BUCHER, D CLAESSON, G CLAUSSEN, A CLEWING, G DEBBE, R DRAGON, L EKLUND, A FOKIN, S GARPMAN, S GLASOW, R GUSTAFSSON, HA GUTBROD, HH HANSEN, O HOLKER, G IDH, J IPPOLITOV, M JACOBS, P KAMPERT, KH KARADJEV, K KOLB, BW LEBEDEV, A LOHNER, H LUND, I MANKO, V MOSKOWITZ, B OBENSHAIN, FE OSKARSSON, A OTTERLUND, I PEITZMANN, T PLASIL, F POSKANZER, AM PURSCHKE, M ROTERS, B SAINI, S SANTO, R SCHMIDT, HR SODERSTROM, K SORENSEN, SP STANKUS, PW STEFFENS, K STEINHAEUSER, P STENLUND, E STUKEN, D VINOGRADOV, A WEGNER, H YOUNG, GR TI SEARCH FOR DIRECT PHOTON PRODUCTION IN 200 A GEV S+AU REACTIONS - A STATUS-REPORT SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA AB Direct thermal photons in the p(T) range of 0 - 5 GeV/c are expected to provide a sensitive probe of the hot dense matter formed in the early stage of relativistic heavy ion collisions. The production of single photons in 200 A GeV S+Au reactions has been investigated using the 3800 element Pbglass calorimeter of CERN experiment WA80. Neutral pi(0) and eta cross sections have been measured via their two-photon decay branch yields. In a first analysis of the WA80 results, a slight excess photon yield above that which may be accounted for by hadronic decays was observed for central collisions. A report on the status of the reanalysis of this data is presented. RP ALBRECHT, R (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. RI Peitzmann, Thomas/K-2206-2012; Lohner, Herbert/B-2397-2014 OI Peitzmann, Thomas/0000-0002-7116-899X; Lohner, Herbert/0000-0002-7441-739X NR 13 TC 9 Z9 9 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C81 EP C92 PG 12 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200007 ER PT J AU ANDERSEN, E BLAES, R CHERNEY, M DELACRUZ, B FERNANDEZ, C GARABATOS, C GARZON, JA GEIST, WM GREINER, DE GRUHN, CR HAFIDOUNI, M HRUBEC, J JONES, PG JUDD, EG KUIPERS, JPM LADREM, M DEGUEVARA, PL LOVHOIDEN, G MACNAUGHTON, J MOSQUERA, J NATANIEC, Z NELSON, JM NEUHOFER, G DELOSHEROS, CP PORTH, MPP POWELL, B RAMIL, A ROHRINGER, H SAKREJDA, I THORSTEINSEN, TF TRAXLER, J VOLTOLINI, C WOZNIAK, K YANEZ, A ZYBERT, R AF ANDERSEN, E BLAES, R CHERNEY, M DELACRUZ, B FERNANDEZ, C GARABATOS, C GARZON, JA GEIST, WM GREINER, DE GRUHN, CR HAFIDOUNI, M HRUBEC, J JONES, PG JUDD, EG KUIPERS, JPM LADREM, M DEGUEVARA, PL LOVHOIDEN, G MACNAUGHTON, J MOSQUERA, J NATANIEC, Z NELSON, JM NEUHOFER, G DELOSHEROS, CP PORTH, MPP POWELL, B RAMIL, A ROHRINGER, H SAKREJDA, I THORSTEINSEN, TF TRAXLER, J VOLTOLINI, C WOZNIAK, K YANEZ, A ZYBERT, R TI RECENT RESULTS FROM THE NA36 EXPERIMENT SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; E+E-ANNIHILATION; 200 GEV/C; STRANGENESS; NUCLEON; XI AB Measurements of the production of Lambda particles in S+Pb and S+S collisions at a beam momentum of 200 GeV/c per nucleon are presented. The S+Pb data was taken with two different experimental configurations, and the results agree well with each other. The effects of a new Monte Carlo simulation of the NA36 TPC on the efficiency calculations are discussed. The Lambda rapidity and multiplicity distributions are then compared to three theoretical models of heavy ion interactions, and to the NA35 results. There is still a significant disagreement between the two experiments. The comparison to the models indicates that reinteractions of secondaries are important in explaining the observed Lambda yields. Finally, the yields of doubly strange baryons in S+Pb interactions have been recalculated using the new efficiencies. The ratios of double to singly strange baryons are unchanged from the previously published results. C1 UNIV STRASBOURG 1,CTR RECH NUCL,CNRS,IN2P3,F-67037 STRASBOURG,FRANCE. CREIGHTON UNIV,DEPT PHYS,OMAHA,NE 68178. CIEMAT,DIV FIS PARTICULAS,E-28040 MADRID,SPAIN. UNIV SANTIAGO,DPTO FIS PARTICULAS,E-15706 SANTIAGO,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. CERN,CH-1211 GENEVA 23,SWITZERLAND. INST NUCL PHYS,PL-30055 KRAKOW 30,POLAND. RP ANDERSEN, E (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI de la Cruz, Begona/K-7552-2014; Yanez, Armando/L-2957-2014; Ramil, Alberto/B-4698-2008 OI Yanez, Armando/0000-0003-4626-7993; Ramil, Alberto/0000-0002-5333-9425 NR 15 TC 10 Z9 10 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C291 EP C306 PG 16 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200022 ER PT J AU ASAKAWA, M HUANG, Z WANG, XN AF ASAKAWA, M HUANG, Z WANG, XN TI FORMATION OF DISORIENTED CHIRAL CONDENSATES THROUGH QUENCHING AND ANNEALING SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA AB We demonstrate that the chiral phase transition is automatically incorporated in the numerical simulations of the classical equations of motion in the linear sigma-model. We find that domains of disoriented chiral condensate with 4-5 fm in size can form through a quench while an annealing leads to domains of smaller sizes. We also demonstrate that quenching cannot be achieved by relaxing a chirally symmetric system through expansion. Furthermore, we point out that the order of the phase transition has little significance for the domain formation. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP ASAKAWA, M (reprint author), COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027, USA. OI Wang, Xin-Nian/0000-0002-9734-9967 NR 8 TC 3 Z9 3 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C575 EP C579 PG 5 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200061 ER PT J AU BOGGILD, H BOISSEVAIN, J CHERNEY, M DITORE, G DODD, J ERAZMUS, B ESUMI, S FABJAN, C FIELDS, DE FERENC, D FRANZ, A GAARDHOJE, J HANSEN, K HANSEN, O HARDTKE, D HOLZER, B HUMANIC, T JACAK, BV JAYANTI, R KALECHOFSKY, H KOBAYASHI, T KVATADZE, R LAUTRIDOU, P LEE, Y LELTCHOUK, M LORSTAD, B LJUBICIC, T MAEDA, N MATSUMOTO, N MEDVEDEV, A MIYABAYASHI, A MURRAY, M NISHIMURA, S NOTEBOOM, E PAIC, G PANDEY, S PIUZ, F PLUTA, J POTEKHIN, M POLYCHRONAKOS, V POULARD, G RAHMANI, A RIEUBLAND, J SAKAGUCHI, A SHIGAKI, K SIMONGILLO, J SCHMIDTSORENSON, J SONDHEIM, W SPEGEL, M SUGITATE, T SULLIVAN, JP SUMI, Y VANHECKE, H VILKELIS, G WILLIS, W WOLF, K XU, N AF BOGGILD, H BOISSEVAIN, J CHERNEY, M DITORE, G DODD, J ERAZMUS, B ESUMI, S FABJAN, C FIELDS, DE FERENC, D FRANZ, A GAARDHOJE, J HANSEN, K HANSEN, O HARDTKE, D HOLZER, B HUMANIC, T JACAK, BV JAYANTI, R KALECHOFSKY, H KOBAYASHI, T KVATADZE, R LAUTRIDOU, P LEE, Y LELTCHOUK, M LORSTAD, B LJUBICIC, T MAEDA, N MATSUMOTO, N MEDVEDEV, A MIYABAYASHI, A MURRAY, M NISHIMURA, S NOTEBOOM, E PAIC, G PANDEY, S PIUZ, F PLUTA, J POTEKHIN, M POLYCHRONAKOS, V POULARD, G RAHMANI, A RIEUBLAND, J SAKAGUCHI, A SHIGAKI, K SIMONGILLO, J SCHMIDTSORENSON, J SONDHEIM, W SPEGEL, M SUGITATE, T SULLIVAN, JP SUMI, Y VANHECKE, H VILKELIS, G WILLIS, W WOLF, K XU, N TI RECENT RESULTS FROM NA44 AND A REVIEW OF HBT SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; BOSE-EINSTEIN CORRELATIONS; 2-PION CORRELATIONS; PION; DYNAMICS; PLASMA; GEV/C RP BOGGILD, H (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 33 TC 8 Z9 8 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C215 EP C232 PG 18 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200017 ER PT J AU CHAPMAN, S SCOTTO, P HEINZ, U AF CHAPMAN, S SCOTTO, P HEINZ, U TI THE OUT-LONGITUDINAL CROSS TERM AND OTHER MODEL-INDEPENDENT FEATURES OF THE 2-PARTICLE HBT CORRELATION-FUNCTION SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; PION INTERFEROMETRY AB Using two specific models and a model independent formalism, we show that an ''out-longitudinal'' cross term should be included in any gaussian fits to correlation data. In addition, we show that correlation radii (including the cross term) measure lengths of homogeneity within the source, not necessarily geometric sizes. C1 UNIV REGENSBURG, INST THEORET PHYS, D-93040 REGENSBURG, GERMANY. RP LOS ALAMOS NATL LAB, POB 1663, LOS ALAMOS, NM 87545 USA. NR 13 TC 11 Z9 11 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C449 EP C452 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200032 ER PT J AU CHEN, ZP CHASMAN, C AF CHEN, ZP CHASMAN, C TI SCALING BETWEEN K+ AND PROTON PRODUCTION IN NUCLEUS-NUCLEUS COLLISIONS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA AB An empirical scaling involving the production of strange particle K+ and protons has been observed at each rapidity over a large range covered by the E-802 spectrometer in reactions from minimum biased p+Be to central Si+Au at 14.6 A . GeV/c. This scaling has implications for the temporal evolution in nucleus-nucleus collisions. RP CHEN, ZP (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C535 EP C538 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200052 ER PT J AU DOVER, CB AF DOVER, CB TI ASPECTS OF STRANGENESS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; SULFUR-TUNGSTEN INTERACTIONS; QUARK-GLUON PLASMA; NUCLEUS-NUCLEUS COLLISIONS; LAMBDA-BAR-PRODUCTION; 200 GEV/C; HADRONIC MATTER; PROTON-NUCLEUS; ANTI-BARYONS; RAPIDITY AB We review various aspects of strangeness production in relativistic heavy ion collisions from AGS to CERN energies. The experimental data are briefly summarized and various possible theoretical interpretations of these data are evaluated, such as quark-gluon-plasma (QGP), hadron gas (HG) thermal models, or event generators (cascade models). Some comments on the production of strange clusters are offered. RP DOVER, CB (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 84 TC 3 Z9 3 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C333 EP C346 PG 14 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200025 ER PT J AU GAVIN, S AF GAVIN, S TI DISORIENTED CHIRAL CONDENSATES SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; PHASE-TRANSITION; EMULSION CHAMBERS; FINITE-TEMPERATURE; ENERGY; SEARCH; QCD; FAMILIES; EVENTS; MODEL AB Measurements of disoriented chiral condensates in heavy ion collisions can yield fundamental information on the nature of the QCD phase transition. I review theoretical efforts to understand the evolution of the condensate and explore the conditions under which the nascent RHIC experiments can distinguish dec signals from heavy ion backgrounds. RP BROOKHAVEN NATL LAB, DEPT PHYS, POB 5000, UPTON, NY 11973 USA. NR 61 TC 37 Z9 37 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C163 EP C177 PG 15 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200014 ER PT J AU HALLMAN, TJ THOMAS, J AF HALLMAN, TJ THOMAS, J TI SUMMARY OF THE PRE-CONFERENCE WORKSHOP - PHYSICS WITH THE COLLIDER DETECTORS AT RHIC AND LHC SO NUCLEAR PHYSICS A LA English DT Editorial Material ID QUARK-GLUON PLASMA; NUCLEUS COLLISIONS; MODEL C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP HALLMAN, TJ (reprint author), UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024, USA. OI Thomas, James/0000-0002-6256-4536 NR 24 TC 2 Z9 2 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C399 EP C430 PG 32 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200030 ER PT J AU JUSTICE, M ALBERGO, S BIESER, F BRADY, FP CACCIA, Z CEBRA, D CHACON, AD CHANCE, J CHOI, Y COSTA, S ELLIOTT, J GILKES, M HAUGER, J HIRSCH, A HJORT, E INSOLIA, A KEANE, D KINTNER, J LISA, M LIU, H MATIS, HS MCGRATH, R MCMAHAN, M MCPARLAND, C OLSON, D PARTLAN, M PORILE, N POTENZA, R RAI, G RASMUSSEN, J RITTER, HG ROMANSKI, J ROMERO, J RUSSO, G SCHARENBERG, R SCOTT, A SHAO, Y SRIVASTAVA, B SYMONS, TJM TINCKNELL, M TUVE, C WANG, S WARREN, P WEERASUNDARA, D WIEMAN, H WOLF, K AF JUSTICE, M ALBERGO, S BIESER, F BRADY, FP CACCIA, Z CEBRA, D CHACON, AD CHANCE, J CHOI, Y COSTA, S ELLIOTT, J GILKES, M HAUGER, J HIRSCH, A HJORT, E INSOLIA, A KEANE, D KINTNER, J LISA, M LIU, H MATIS, HS MCGRATH, R MCMAHAN, M MCPARLAND, C OLSON, D PARTLAN, M PORILE, N POTENZA, R RAI, G RASMUSSEN, J RITTER, HG ROMANSKI, J ROMERO, J RUSSO, G SCHARENBERG, R SCOTT, A SHAO, Y SRIVASTAVA, B SYMONS, TJM TINCKNELL, M TUVE, C WANG, S WARREN, P WEERASUNDARA, D WIEMAN, H WOLF, K TI OBSERVATION OF COLLECTIVE EFFECTS IN LAMBDA-PRODUCTION AT 2 GEV/NUCLEON SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; NUCLEUS COLLISIONS; PION EMISSION C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV CALIF DAVIS,DAVIS,CA 95616. TEXAS A&M UNIV,COLLEGE STN,TX 77843. IST NAZL FIS NUCL,I-95129 CATANIA,ITALY. SUNY STONY BROOK,STONY BROOK,NY 11794. UNIV CATANIA,I-95129 CATANIA,ITALY. KENT STATE UNIV,KENT,OH 44242. RI Insolia, Antonio/M-3447-2015; TUVE', Cristina/P-3933-2015 OI Insolia, Antonio/0000-0002-9040-1566; TUVE', Cristina/0000-0003-0739-3153 NR 13 TC 10 Z9 10 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C549 EP C552 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200055 ER PT J AU KLUGER, Y COOPER, F MOTTOLA, E PAZ, JP KOVNER, A AF KLUGER, Y COOPER, F MOTTOLA, E PAZ, JP KOVNER, A TI QUANTUM EVOLUTION OF THE DISORIENTED CHIRAL CONDENSATES SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HIGH-ENERGY; COLLISIONS; FIELD AB We study the dynamics of the chiral phase transition expected during the expansion of the quark-gluon plasma produced in a high energy hadron or heavy ion collision, using the O(4) linear sigma model in the mean field approximation. Imposing boost invariant initial conditions at an initial proper time tau(0) and starting from an approximate equilibrium configuration, we investigate the possibility of formation of disoriented chiral condensate during the expansion. In order to create large domains of disoriented chiral condensates low-momentum instabilities have to last for long enough periods of time. Our simulations show no instabilities for an initial thermal configuration. For some of the out-of-equilibrium initial states studied, the fluctuation in the number of particles with low transverse momenta become large at late proper times. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. UNIV MINNESOTA, SCH PHYS & ASTRON, MINNEAPOLIS, MN 55455 USA. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, MS 70A-3307, BERKELEY, CA 94720 USA. RI Paz, Juan/C-5947-2008 NR 13 TC 26 Z9 26 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C581 EP C584 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200062 ER PT J AU KOCH, V AF KOCH, V TI COLD KAONS FROM HOT FIREBALLS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS AB The E814-collaboration has found a component of very low m(t) K+ mesons with a slope parameter of T similar to 15 MeV. We will present a scenario which explains the observed slope parameter and which allows us to predict the expected slope parameter for kaons produced in heavier systems such as Au+Au. We also will discuss the effect of the coulomb interaction on the structure of the spectrum. RP KOCH, V (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 9 TC 4 Z9 4 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C531 EP C534 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200051 ER PT J AU LONGACRE, RS AF LONGACRE, RS TI H-0 CANDIDATES FROM THE DECAY H-0-]SIGMA(-)P, OBSERVED IN HEAVY-ION COLLISIONS WITH 14.6XA GEV/C SI BEAM ON PB TARGET SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID EVENT AB We present H-0 candidate events, where the H-0 is observed through the decay H-0 --> Sigma(-)p. These decays are reconstructed in the three TPC modules of E810 while triggering on central Si Pb events at 14.6 x A GeV/c Si beam. RP LONGACRE, RS (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 10 TC 15 Z9 15 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C477 EP C482 PG 6 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200038 ER PT J AU MARGETIS, S ALBER, T APPELSHAUSER, H BACHLER, J BARTKE, J BIALKOWSKA, H BIESER, F BLOOMER, MA BLYTH, CO BOCK, R BORMANN, C BRADY, FP BROCKMANN, R BUNCIC, P CAINES, HL CEBRA, D CHAN, P COOPER, G CRAMER, JG CRAMER, PB CSATO, P DERADO, I DUNN, J ECKARDT, V ECKHARDT, F EULER, S FERGUSON, MI FISCHER, HG FODOR, Z FOKA, P FREUND, P FUCHS, M GAL, J GAZDZICKI, M GLADYSZ, E GREBIESZKOW, J GUNTHER, J HARRIS, JW HECK, W HEGYI, S HILL, LA HUANG, I HOWE, MA IGO, G IRMSCHER, D JACOBS, P JONES, PG KADIJA, K KECSKEMETI, J KOSIEC, J KOWALSKI, M KUHMICHEL, A LASIUK, B MITCHELL, JW MOCK, A NELSON, JM ODYNIEC, G PALINKAS, J PALLA, G PANAGIOTOU, AD PETRIDIS, A PIPER, A POSKANZER, AM PRINDLE, DJ PUHLHOFER, F RAUCH, W RENFORDT, R RETYK, W RITTER, HG ROHRICH, D RUDOLPH, H RUNGE, K SANDOVAL, A SANN, H SCHAFER, E SCHMITZ, N SCHONFELDER, S SEYBOTH, P SEYERLEIN, J SIKLER, F SKRZYPCZAK, E STEFANSKI, P STOCK, R STROBELE, H SZENTPETERY, I SZIKLAI, J TOY, M TRAINOR, TA TRENTALANGE, S VASSILIOU, M VESZTERGOMBI, G VRANIC, D WENIG, S WHITTEN, C WIENOLD, T WOOD, L ZIMANYI, J ZHU, XZ ZYBERT, R AF MARGETIS, S ALBER, T APPELSHAUSER, H BACHLER, J BARTKE, J BIALKOWSKA, H BIESER, F BLOOMER, MA BLYTH, CO BOCK, R BORMANN, C BRADY, FP BROCKMANN, R BUNCIC, P CAINES, HL CEBRA, D CHAN, P COOPER, G CRAMER, JG CRAMER, PB CSATO, P DERADO, I DUNN, J ECKARDT, V ECKHARDT, F EULER, S FERGUSON, MI FISCHER, HG FODOR, Z FOKA, P FREUND, P FUCHS, M GAL, J GAZDZICKI, M GLADYSZ, E GREBIESZKOW, J GUNTHER, J HARRIS, JW HECK, W HEGYI, S HILL, LA HUANG, I HOWE, MA IGO, G IRMSCHER, D JACOBS, P JONES, PG KADIJA, K KECSKEMETI, J KOSIEC, J KOWALSKI, M KUHMICHEL, A LASIUK, B MITCHELL, JW MOCK, A NELSON, JM ODYNIEC, G PALINKAS, J PALLA, G PANAGIOTOU, AD PETRIDIS, A PIPER, A POSKANZER, AM PRINDLE, DJ PUHLHOFER, F RAUCH, W RENFORDT, R RETYK, W RITTER, HG ROHRICH, D RUDOLPH, H RUNGE, K SANDOVAL, A SANN, H SCHAFER, E SCHMITZ, N SCHONFELDER, S SEYBOTH, P SEYERLEIN, J SIKLER, F SKRZYPCZAK, E STEFANSKI, P STOCK, R STROBELE, H SZENTPETERY, I SZIKLAI, J TOY, M TRAINOR, TA TRENTALANGE, S VASSILIOU, M VESZTERGOMBI, G VRANIC, D WENIG, S WHITTEN, C WIENOLD, T WOOD, L ZIMANYI, J ZHU, XZ ZYBERT, R TI FIRST RESULTS FROM NA49 ON PB+PB COLLISIONS AT 158 GEV/NUCLEON SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID NUCLEUS COLLISIONS AB First results from the NA49 experiment with a Pb-208 beam on a Pb target at the CERN SPS with total energy of 33 TeV are presented. Data on transverse energy production, forward energy flow and rapidity density of negative hadrons are shown and discussed. The degree of nuclear stopping and the energy densities achieved are estimated for near head-on collisions. C1 UNIV ATHENS,DEPT PHYS,ATHENS,GREECE. UNIV BIRMINGHAM,BIRMINGHAM,W MIDLANDS,ENGLAND. INST PHYS,BUDAPEST,HUNGARY. CERN,CH-1211 GENEVA,SWITZERLAND. INST NUCL PHYS,KRAKOW,POLAND. GESELL SCHWERIONENFORSCH MBH,W-6100 DARMSTADT,GERMANY. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV FRANKFURT,FACHBEREICH PHYS,W-6000 FRANKFURT,GERMANY. UNIV FREIBURG,FACHBEREICH PHYS,FREIBURG,GERMANY. UNIV CALIF LOS ANGELES,LOS ANGELES,CA. UNIV MARBURG,FACHBEREICH PHYS,W-3550 MARBURG,GERMANY. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,INST EXPTL PHYS,WARSAW,POLAND. UNIV WASHINGTON,NUCL PHYS LAB,SEATTLE,WA 98195. RUDJER BOSKOVIC INST,ZAGREB,CROATIA. MAX PLANCK INST PHYS & ASTROPHYS,MUNICH,GERMANY. RP MARGETIS, S (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Palinkas, Jozsef/B-2993-2011 NR 8 TC 26 Z9 26 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C355 EP C365 PG 11 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200027 ER PT J AU PANG, Y KAHANA, DE KAHANA, SH SCHLAGEL, TJ AF PANG, Y KAHANA, DE KAHANA, SH SCHLAGEL, TJ TI MODELING RELATIVISTIC HEAVY-ION COLLISIONS - FROM AGS TO SPS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID CASCADE C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. RP PANG, Y (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,BLDG 510A,UPTON,NY 11973, USA. OI Kahana, Sidney/0000-0002-5790-9384; Kahana, David Ewan/0000-0003-1266-9089 NR 4 TC 4 Z9 4 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C565 EP C570 PG 6 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200059 ER PT J AU PISARSKI, RD AF PISARSKI, RD TI THERMAL RHOS IN THE QUARK-GLUON PLASMA SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID QCD SUM-RULES; FINITE-TEMPERATURE; CHIRAL RESTORATION; TRANSITION; SPECTRUM; MESONS AB I discuss different models which predict changes in the mass of the thermal rho field. I emphasize that while the predictions are strongly model dependent, nevertheless substantial shifts in the thermal rho mass are expected to occur at the point of phase transition. As long as the thermal rho peak does not become too broad, this should provide a striking signature of the existence of a phase transition. RP PISARSKI, RD (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,POB 5000,UPTON,NY 11973, USA. NR 23 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C553 EP C556 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200056 ER PT J AU PLUMER, M GYULASSY, M WANG, XN AF PLUMER, M GYULASSY, M WANG, XN TI JET QUENCHING AND MONOJET RATES IN ULTRARELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID PLASMA; MODEL AB Using recent estimates for the radiative energy loss of a high energy parton in a quark-gluon-plasma (QGP), it is shown that a rapid change in the Debye mass at the critical temperature may result in a dip in the monojet fraction as a function of the CM energy of the AA collision. C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP PLUMER, M (reprint author), UNIV MARBURG,DEPT PHYS,D-35032 MARBURG,GERMANY. NR 8 TC 17 Z9 17 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C511 EP C514 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200046 ER PT J AU SIMONGILLO, J AF SIMONGILLO, J TI DEUTERON AND ANTI-DEUTERON PRODUCTION IN CERN EXPERIMENT NA44 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; COMPOSITE-PARTICLE-EMISSION; NUCLEAR COLLISIONS; FRAGMENTS; STATE AB The abundances of light nuclei probe the later stages of the evolution of a system formed in a relativistic heavy-ion collision. After the system has cooled and expanded, nucleons in close proximity and moving with small relative momenta coalesce to form nuclei. Light nuclei production enables the study of several topics, including the mechanism of composite particle production, freeze-out temperature, size of the interaction region, and entropy of the system. NA44 is the only relativistic heavy-ion experiment to have both deuteron and anti-deuteron results in both pA and AA collisions and the first CERN experiment to study the physics topics addressed by d and (d) over bar production. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM USA. CREIGHTON UNIV, OMAHA, NE 68178 USA. COLUMBIA UNIV, NEW YORK, NY 10027 USA. HIROSHIMA UNIV, HIROSHIMA, JAPAN. CERN, CH-1211 GENEVA, SWITZERLAND. OHIO STATE UNIV, COLUMBUS, OH 43210 USA. LUND UNIV, LUND, SWEDEN. TEXAS A&M UNIV, COLLEGE STN, TX 77843 USA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK. NR 19 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 EI 1873-1554 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C483 EP C486 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200039 ER PT J AU VIYOGI, VP AGARWAL, MM AWES, TC BADYAL, SK BHALLA, KB BHATIA, VS CHATOPADHYAY, S DAS, AC DEVANAND MAZUMDAR, MRD GANTI, MS GHOSH, TK GUPTA, SK GUTBROD, HH KACHROO, S KOLB, BW KUMAR, V LOKANATHAN, S MITTRA, LS MOOKERJEE, S NAYAK, SK RANIWALA, S RAO, NK SAMBYAL, SS SCHMIDT, HR SINHA, BC TRIVEDI, MD AF VIYOGI, VP AGARWAL, MM AWES, TC BADYAL, SK BHALLA, KB BHATIA, VS CHATOPADHYAY, S DAS, AC DEVANAND MAZUMDAR, MRD GANTI, MS GHOSH, TK GUPTA, SK GUTBROD, HH KACHROO, S KOLB, BW KUMAR, V LOKANATHAN, S MITTRA, LS MOOKERJEE, S NAYAK, SK RANIWALA, S RAO, NK SAMBYAL, SS SCHMIDT, HR SINHA, BC TRIVEDI, MD TI RESULTS FROM THE WA93 PHOTON MULTIPLICITY DETECTOR SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID DISTRIBUTIONS; COLLISIONS C1 PUNJABI UNIV,CHANDIGARH 160014,INDIA. OAK RIDGE NATL LAB,OAK RIDGE,TN. UNIV JAMMU,JAMMU 180001,INDIA. UNIV RAJASTHAN,JAIPUR 302004,RAJASTHAN,INDIA. GSI DARMSTADT,W-6100 DARMSTADT,GERMANY. INST PHYS,BHUBANESWAR 751007,ORISSA,INDIA. RP VIYOGI, VP (reprint author), BHABHA ATOM RES CTR,CTR VARIABLE ENERGY CYCLOTRON,CALCUTTA 700064,W BENGAL,INDIA. NR 9 TC 4 Z9 4 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C503 EP C506 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200044 ER PT J AU VOLOSHIN, SA AF VOLOSHIN, SA TI DN(CH)/D-ETA DISTRIBUTIONS IN AU+AL, CU, AU, AND U COLLISIONS AT 10.8 A-CENTER-DOT-GEV/C AND E(T) PER CHARGED-PARTICLE SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA AB The pseudorapidity distributions are analyzed as a function of transverse energy produced in the target or central pseudorapidity regions. The transverse energy per charged particle is presented as a function of pseudorapidity and centrality. C1 MCGILL UNIV,MONTREAL,PQ,CANADA. BROOKHAVEN NATL LAB,UPTON,NY 11973. INEL,IDAHO FALLS,ID. SUNY STONY BROOK,STONY BROOK,NY. UNIV SAO PAULO,BR-05508 SAO PAULO,BRAZIL. WAYNE STATE UNIV,DETROIT,MI 48202. RP VOLOSHIN, SA (reprint author), UNIV PITTSBURGH,PITTSBURGH,PA 15260, USA. RI Voloshin, Sergei/I-4122-2013 NR 3 TC 1 Z9 1 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C605 EP C608 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200068 ER PT J AU WANG, XN AF WANG, XN TI APPROACH TO PARTON EQUILIBRATION SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; STRONG ELECTRIC-FIELD; TRANSPORT-COEFFICIENTS; PARTICLE-PRODUCTION; PAIR PRODUCTION; MODEL; MINIJETS; QUARK; MATTER AB Perturbative QCD-based models of parton production and equilibration in ultrarelativistic heavy ion collisions are reviewed with an emphasis on the treatment of quantum interference effects. Uncertainties in the initial parton production and their effects on later parton equilibration are considered. Probes of early parton dynamics are also discussed. RP WANG, XN (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,MS70A-3307,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 56 TC 7 Z9 7 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 JUL 24 PY 1995 VL 590 IS 1-2 BP C47 EP C62 PG 16 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200005 ER PT J AU ZHANG, YC WESSELS, JP AF ZHANG, YC WESSELS, JP TI ENERGY-FLOW AND PARTICLE SPECTRA WITH RESPECT TO THE REACTION PLANE FOR AU+AU COLLISIONS AT AGS ENERGIES SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 11th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions CY JAN 09-13, 1995 CL MONTEREY, CA ID HEAVY-ION COLLISIONS AB Transverse energy how is studied by exploiting the near 4 pi calorimetric coverage of experiment E877. A Fourier decomposition of the azimuthal transverse energy distributions in different regions of pseudorapidity is performed as a function of the centrality in order to describe the event shape. The extracted coefficients are compared to model predictions. Using the E877 forward spectrometer, triple differential cross section for protons and pi(+) are measured with respect to the reaction plane determined by calorimeters. The variation of slope parameters at different orientations to the reaction plane is obtained by fitting to thermal Boltxmann distributions. C1 WAYNE STATE UNIV,DETROIT,MI 48202. UNIV SAO PAULO,BR-05508 SAO PAULO,BRAZIL. UNIV PITTSBURGH,PITTSBURGH,PA. MCGILL UNIV,MONTREAL,PQ,CANADA. INEL,IDAHO FALLS,ID. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP ZHANG, YC (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 8 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD JUL 24 PY 1995 VL 590 IS 1-2 BP C557 EP C560 PG 4 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200057 ER PT J AU POSKANZER, A AF POSKANZER, A TI PROCEEDINGS OF THE 11TH INTERNATIONAL-CONFERENCE ON ULTRA-RELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS MONTEREY, CALIFORNIA, USA, 9-13 JANUARY 1995 - PREFACE SO NUCLEAR PHYSICS A LA English DT Editorial Material RP POSKANZER, A (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 0 TC 1 Z9 1 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 JUL 24 PY 1995 VL 590 IS 1-2 BP R11 EP R12 DI 10.1016/0375-9474(95)90375-5 PG 2 WC Physics, Nuclear SC Physics GA RQ042 UT WOS:A1995RQ04200001 ER PT J AU OHNISHI, A RANDRUP, J AF OHNISHI, A RANDRUP, J TI INCORPORATION OF QUANTUM-STATISTICAL FEATURES IN MOLECULAR-DYNAMICS SO PHYSICAL REVIEW LETTERS LA English DT Article ID HEAVY-ION COLLISIONS; ANTISYMMETRIZED VERSION; 2-NUCLEON COLLISIONS; FRAGMENT FORMATION; STATE; MODEL AB We formulate a method for incorporating quantum fluctuations into molecular-dynamics simulations of many-body systems, such as those employed for energetic nuclear collision processes. Based on Fermi's golden rule, we allow spontaneous transitions to occur between the wave packets which are not energy eigenstates. The ensuing diffusive evolution in the space of the wave packet parameters exhibits appealing physical properties, including relaxation towards quantum statistical equilibrium. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. RP OHNISHI, A (reprint author), HOKKAIDO UNIV, DEPT PHYS, SAPPORO, HOKKAIDO 060, JAPAN. RI Ohnishi, Akira/F-7403-2011 OI Ohnishi, Akira/0000-0003-1513-0468 NR 11 TC 26 Z9 26 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 596 EP 599 DI 10.1103/PhysRevLett.75.596 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000002 ER PT J AU DODELSON, S KOSOWSKY, A AF DODELSON, S KOSOWSKY, A TI ANALYSIS OF SMALL-SCALE AND MEDIUM-SCALE COSMIC MICROWAVE BACKGROUND MEASUREMENTS SO PHYSICAL REVIEW LETTERS LA English DT Article ID DEGREE ANGULAR SCALES; RADIATION ANISOTROPY; DARK MATTER; COBE; UNIVERSE AB Anisotropies in the temperature of the cosmic microwave background have been detected on a range of scales by several different experiments. In principle, the largest barrier to a clean interpretation of the experimental results is contamination by foreground sources. We address this issue by projecting out likely sources of foreground contamination from seven separate small-angle and medium-angle experiments. All of the experiments are consistent so far with the simplest inflationary models; for n = 1 the experiments' combined best-fit quadrupole amplitude is Q(rms-ps) = 18(-1)(+3) mu K, in excellent agreement with the Cosmic Background Explorer two-year data. C1 UNIV CHICAGO,ENRICO FERMI INST,DEPT PHYS,CHICAGO,IL 60637. RP DODELSON, S (reprint author), FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510, USA. NR 29 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 JUL 24 PY 1995 VL 75 IS 4 BP 604 EP 607 DI 10.1103/PhysRevLett.75.604 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000004 ER PT J AU ABE, F ALBROW, MG AMENDOLIA, SR 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 BROMBERG, C 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 CHAO, HY CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CHIOU, CN CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M COUYOUMTZELIS, C 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 DITTMAN, JR 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 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 LABANCA, N 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 LYS, J 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 TENG, PK 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, SC VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, CH WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G 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 YOSEF, C 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 AMENDOLIA, SR 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 BROMBERG, C 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 CHAO, HY CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CHIOU, CN CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M COUYOUMTZELIS, C 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 DITTMAN, JR 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 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 LABANCA, N 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 LYS, J 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 TENG, PK 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, SC VEJCIK, S VIDAL, R VONDRACEK, M WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, CH WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G 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 YOSEF, C YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S TI PROPERTIES OF HIGH-MASS MULTIJET EVENTS AT THE FERMILAB PROTON-ANTIPROTON COLLIDER SO PHYSICAL REVIEW LETTERS LA English DT Article ID COLLISIONS; TEV AB The properties of two-, three-, four-, five-, and six-jet events with multijet masses >600 GeV/c(2) are compared with QCD predictions. The shapes of the multijet-mass and leading-jet-angular distributions are approximately independent of jet multiplicity and are well described by the NJETS matrix element calculation and the HERWIG parton shower Monte Carlo predictions. The observed jet transverse momentum distributions for three- and four-jet events discriminate between the matrix element and parton shower predictions, the data favoring the matrix element calculation. 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,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV 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. 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. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP ABE, F (reprint author), KEK NAT 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; Tartarelli, Giuseppe Francesco/A-5629-2016; OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Bertolucci, Sergio/0000-0003-1738-4736; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Turini, Nicola/0000-0002-9395-5230; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Tartarelli, Giuseppe Francesco/0000-0002-4244-502X; Wyss, Jeffery/0000-0002-8277-4012 NR 7 TC 24 Z9 24 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 608 EP 612 DI 10.1103/PhysRevLett.75.608 PG 5 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000005 ER PT J AU ABE, F ALBROW, M AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BACCHETTA, N BADEN, AR BADGETT, W BAILEY, MW BAMBERGER, A 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 BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CEN, Y CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FRAUTSCHI, M FELDMAN, GJ FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GAGLIARDI, G GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GONZALEZ, J GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTHEWS, JAJ MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PIACENTINO, AG PLUNKETT, R PONDROM, L PROUDFOOT, J PTOHOS, F PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCIACCA, G SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P SPIES, A STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZHANG, W ZUCCHELLI, S AF ABE, F ALBROW, M AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BACCHETTA, N BADEN, AR BADGETT, W BAILEY, MW BAMBERGER, A 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 BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CEN, Y CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DICKSON, M DONATI, S DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FRAUTSCHI, M FELDMAN, GJ FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GAGLIARDI, G GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GONZALEZ, J GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTHEWS, JAJ MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAGLIARONE, C PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PIACENTINO, AG PLUNKETT, R PONDROM, L PROUDFOOT, J PTOHOS, F PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCIACCA, G SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P SPIES, A STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YAO, W YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZHANG, W ZUCCHELLI, S TI SEARCH FOR SQUARKS AND GLUINOS VIA RADIATIVE DECAYS OF NEUTRALINOS IN PROTON-ANTIPROTON COLLISIONS AT ROOT-S=1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID FERMILAB TEVATRON; COLLIDER; MODEL; PARTICLES; DETECTOR; HIGGSINO; MASS; LEP AB We have sought evidence for radiative decays of neutralinos produced in proton-antiproton collisions at root s = 1.8 TeV. Events containing two photons plus large missing transverse energy were investigated. The observed event rate and the missing transverse energy distribution of the two-photon events are consistent with QCD predictions. Inferred limits on squark and gluino masses depend on the supersymmetry model parameters. The particular choices mu = -40 GeV/c(2) and tan beta = 1.5 lead to 90%-confidence-level asymptotic lower limits of 110 GeV/c(2) and 140 GeV/c(2) for squarks and gluinos, respectively. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27706. 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,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. 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. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. TEXAS A&M UNIV,COLLEGE STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. RP ABE, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI St.Denis, Richard/C-8997-2012; 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 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; NR 26 TC 12 Z9 12 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 JUL 24 PY 1995 VL 75 IS 4 BP 613 EP 617 DI 10.1103/PhysRevLett.75.613 PG 5 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000006 ER PT J AU ABACHI, S ABBOTT, B ABOLINS, M ACHARYA, BS ADAM, I ADAMS, DL ADAMS, M AHN, S AIHARA, H ALITTI, J ALVAREZ, G ALVES, GA AMIDI, E AMOS, N ANDERSON, EW ARONSON, SH ASTUR, R AVERY, RE BADEN, A BALAMURALI, V BALDERSTON, J BALDIN, B BANTLY, J BARTLETT, JF BAZIZI, K BENDICH, J BERI, SB BERTRAM, I BEZZUBOV, VA BHAT, PC BHATNAGAR, V BHATTACHARJEE, M BISCHOFF, A BISWAS, N BLAZEY, G BLESSING, S BOEHNLEIN, A BOJKO, NI BORCHERDING, F BORDERS, J BOSWELL, C BRANDT, A BROCK, R BROSS, A BUCHHOLZ, D BURTOVOI, VS BUTLER, JM CASEY, D CASTILLAVALDEZ, H CHAKRABORTY, D CHANG, SM CHEKULAEV, SV CHEN, LP CHEN, W CHEVALIER, L CHOPRA, S CHOUDHARY, BC CHRISTENSON, JH CHUNG, M CLAES, D CLARK, AR COBAU, WG COCHRAN, J COOPER, WE CRETSINGER, C CULLENVIDAL, D CUMMINGS, M CUTTS, D DAHL, OI DE, K DEMARTEAU, M DEMINA, R DENISENKO, K DENISENKO, N DENISOV, D DENISOV, SP DHARMARATNA, W DIEHL, HT DIESBURG, M DILORETO, G DIXON, R DRAPER, P DRINKARD, J DUCROS, Y DUGAD, SR DURSTONJOHNSON, S EDMUNDS, D EFIMOV, AO ELLISON, J ELVIRA, VD ENGELMANN, R ENO, S EPPLEY, G ERMOLOV, P EROSHIN, OV EVDOKIMOV, VN FAHEY, S FAHLAND, T FATYGA, M FATYGA, MK FEATHERLY, J FEHER, S FEIN, D FERBEL, T FINOCCHIARO, G FISK, HE FISYAK, Y FLATTUM, E FORDEN, GE FORTNER, M FRAME, KC FRANZINI, P FREDRIKSEN, S FUESS, S GALJAEV, AN GALLAS, E GAO, CS GAO, S GELD, TL GENIK, RJ GENSER, K GERBER, CE GIBBARD, B GLEBOV, V GLENN, S GOBBI, B GOFORTH, M GOLDSCHMIDT, A GOMEZ, B GONCHAROV, PI GORDON, H GOSS, LT GRAF, N GRANNIS, PD GREEN, DR GREEN, J GREENLEE, H GRIFFIN, G GROSSMAN, N GRUDBERG, P GRUNENDAHL, S GUIDA, JA GUIDA, JM GURYN, W GURZHIEV, SN GUTNIKOV, YE HADLEY, NJ HAGGERTY, H HAGOPIAN, S HAGOPIAN, V HAHN, KS HALL, RE HANSEN, S HATCHER, R HAUPTMAN, JM HEDIN, D HEINSON, AP HEINTZ, U HERNANDEZMONTOYA, R HEURING, T HIROSKY, R HOBBS, JD HOENEISEN, B HOFTUN, JS HSIEH, F HU, T HU, T HUEHN, T IGARASHI, S ITO, AS JAMES, E JAQUES, J JERGER, SA JIANG, JZY JOFFEMINOR, T JOHARI, H JOHNS, K JOHNSON, M JOHNSTAD, H JONCKHEERE, A JONES, M JOSTLEIN, H JUN, SY JUNG, CK KAHN, S KANG, JS KEHOE, R KELLY, M KERNAN, A KERTH, L KIM, CL KIM, SK KLATCHKO, A KLIMA, B KLOCHKOV, BI KLOPFENSTEIN, C KLYUKHIN, VI KOCHETKOV, VI KOHLI, JM KOLTICK, D KOSTRITSKIY, AV KOTCHER, J KOURLAS, J KOZELOV, AV KOZLOVSKI, EA KRISHNASWAMY, MR KRZYWDZINSKI, S KUNORI, S LAMI, S LANDSBERG, G LANOU, RE LEBRAT, JF LEFLAT, A LI, H LI, J LI, YK LIDEMARTEAU, QZ LIMA, JGR LINCOLN, D LINN, SL LINNEMANN, J LIPTON, R LIU, YC LOBKOWICZ, F LOKEN, SC LOKOS, S LUEKING, L LYON, AL MACIEL, AKA MADARAS, RJ MADDEN, R MANDRICHENKO, IV MANGEOT, P MANI, S MANSOULIE, B MAO, HS MARGULIES, S MARKELOFF, R MARKOSKY, L MARSHALL, T MARTIN, MI MARX, M MAY, B MAYOROV, AA MCCARTHY, R MCKIBBEN, T MCKINLEY, J MELANSON, HL NETO, JRTD MERRITT, KW MIETTINEN, H MILDER, A MILNER, C MINCER, A DEMIRANDA, JM MISHRA, CS MOHAMMADIBAARMAND, M MOKHOV, N MONDAL, NK MONTGOMERY, HE MOONEY, P MUDAN, M MURPHY, C MURPHY, CT NANG, F NARAIN, M NARASIMHAM, VS NARAYANAN, A NEAL, HA NEGRET, JP NEIS, E NEMETHY, P NESIC, D NORMAN, D OESCH, L OGURI, V OLTMAN, E OSHIMA, N OWEN, D PADLEY, P PANG, M PARA, A PARK, CH PARK, YM PARTRIDGE, R PARUA, N PATERNO, M PERKINS, J PERYSHKIN, A PETERS, M PIEKARZ, H PISCHALNIKOV, Y PLUQUET, A PODSTAVKOV, VM POPE, BG PROSPER, HB PROTOPOPESCU, S PUSELJIC, D QIAN, J QUINTAS, PZ RAJA, R RAJAGOPALAN, S RAMIREZ, O RAO, MVS RAPIDIS, PA RASMUSSEN, L READ, AL REUCROFT, S RIJSSENBEEK, M ROCKWELL, T ROE, NA ROLDAN, JMR RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H SCHMID, D SCULLI, J SHABALINA, E SHAFFER, C SHANKAR, HC SHIVPURI, RK SHUPE, M SINGH, JB SIROTENKO, V SMART, W SMITH, A SMITH, RP SNIHUR, R SNOW, GR SNYDER, S SOLOMON, J SOOD, PM SOSEBEE, M SOUZA, M SPADAFORA, AL STEPHENS, RW STEVENSON, ML STEWART, D STOCKER, F STOIANOVA, DA STOKER, D STREETS, K STROVINK, M TAKETANI, A TAMBURELLO, P TARAZI, J TARTAGLIA, M TAYLOR, TL TEIGER, J THOMPSON, J TRIPPE, TG TUTS, PM VARELAS, N VARNES, EW VIRADOR, PRG VITITOE, D VOLKOV, AA VOROBIEV, AP WAHL, HD WANG, J WANG, LZ WARCHOL, J WAYNE, M WEERTS, H WENZEL, WA WHITE, A WHITE, JT WIGHTMAN, JA WILCOX, J WILLIS, S WIMPENNY, SJ WIRJAWAN, JVD WOLF, Z WOMERSLEY, J WON, E WOOD, DR XU, H YAMADA, R YAMIN, P YANAGISAWA, C YANG, J YASUDA, T YOSHIKAWA, C YOUSSEF, S YU, J YU, Y ZHANG, Y ZHOU, YH ZHU, Q ZHU, YS ZHU, ZH ZIEMINSKA, D ZIEMINSKI, A ZINCHENKO, A ZYLBERSTEJN, A AF ABACHI, S ABBOTT, B ABOLINS, M ACHARYA, BS ADAM, I ADAMS, DL ADAMS, M AHN, S AIHARA, H ALITTI, J ALVAREZ, G ALVES, GA AMIDI, E AMOS, N ANDERSON, EW ARONSON, SH ASTUR, R AVERY, RE BADEN, A BALAMURALI, V BALDERSTON, J BALDIN, B BANTLY, J BARTLETT, JF BAZIZI, K BENDICH, J BERI, SB BERTRAM, I BEZZUBOV, VA BHAT, PC BHATNAGAR, V BHATTACHARJEE, M BISCHOFF, A BISWAS, N BLAZEY, G BLESSING, S BOEHNLEIN, A BOJKO, NI BORCHERDING, F BORDERS, J BOSWELL, C BRANDT, A BROCK, R BROSS, A BUCHHOLZ, D BURTOVOI, VS BUTLER, JM CASEY, D CASTILLAVALDEZ, H CHAKRABORTY, D CHANG, SM CHEKULAEV, SV CHEN, LP CHEN, W CHEVALIER, L CHOPRA, S CHOUDHARY, BC CHRISTENSON, JH CHUNG, M CLAES, D CLARK, AR COBAU, WG COCHRAN, J COOPER, WE CRETSINGER, C CULLENVIDAL, D CUMMINGS, M CUTTS, D DAHL, OI DE, K DEMARTEAU, M DEMINA, R DENISENKO, K DENISENKO, N DENISOV, D DENISOV, SP DHARMARATNA, W DIEHL, HT DIESBURG, M DILORETO, G DIXON, R DRAPER, P DRINKARD, J DUCROS, Y DUGAD, SR DURSTONJOHNSON, S EDMUNDS, D EFIMOV, AO ELLISON, J ELVIRA, VD ENGELMANN, R ENO, S EPPLEY, G ERMOLOV, P EROSHIN, OV EVDOKIMOV, VN FAHEY, S FAHLAND, T FATYGA, M FATYGA, MK FEATHERLY, J FEHER, S FEIN, D FERBEL, T FINOCCHIARO, G FISK, HE FISYAK, Y FLATTUM, E FORDEN, GE FORTNER, M FRAME, KC FRANZINI, P FREDRIKSEN, S FUESS, S GALJAEV, AN GALLAS, E GAO, CS GAO, S GELD, TL GENIK, RJ GENSER, K GERBER, CE GIBBARD, B GLEBOV, V GLENN, S GOBBI, B GOFORTH, M GOLDSCHMIDT, A GOMEZ, B GONCHAROV, PI GORDON, H GOSS, LT GRAF, N GRANNIS, PD GREEN, DR GREEN, J GREENLEE, H GRIFFIN, G GROSSMAN, N GRUDBERG, P GRUNENDAHL, S GUIDA, JA GUIDA, JM GURYN, W GURZHIEV, SN GUTNIKOV, YE HADLEY, NJ HAGGERTY, H HAGOPIAN, S HAGOPIAN, V HAHN, KS HALL, RE HANSEN, S HATCHER, R HAUPTMAN, JM HEDIN, D HEINSON, AP HEINTZ, U HERNANDEZMONTOYA, R HEURING, T HIROSKY, R HOBBS, JD HOENEISEN, B HOFTUN, JS HSIEH, F HU, T HU, T HUEHN, T IGARASHI, S ITO, AS JAMES, E JAQUES, J JERGER, SA JIANG, JZY JOFFEMINOR, T JOHARI, H JOHNS, K JOHNSON, M JOHNSTAD, H JONCKHEERE, A JONES, M JOSTLEIN, H JUN, SY JUNG, CK KAHN, S KANG, JS KEHOE, R KELLY, M KERNAN, A KERTH, L KIM, CL KIM, SK KLATCHKO, A KLIMA, B KLOCHKOV, BI KLOPFENSTEIN, C KLYUKHIN, VI KOCHETKOV, VI KOHLI, JM KOLTICK, D KOSTRITSKIY, AV KOTCHER, J KOURLAS, J KOZELOV, AV KOZLOVSKI, EA KRISHNASWAMY, MR KRZYWDZINSKI, S KUNORI, S LAMI, S LANDSBERG, G LANOU, RE LEBRAT, JF LEFLAT, A LI, H LI, J LI, YK LIDEMARTEAU, QZ LIMA, JGR LINCOLN, D LINN, SL LINNEMANN, J LIPTON, R LIU, YC LOBKOWICZ, F LOKEN, SC LOKOS, S LUEKING, L LYON, AL MACIEL, AKA MADARAS, RJ MADDEN, R MANDRICHENKO, IV MANGEOT, P MANI, S MANSOULIE, B MAO, HS MARGULIES, S MARKELOFF, R MARKOSKY, L MARSHALL, T MARTIN, MI MARX, M MAY, B MAYOROV, AA MCCARTHY, R MCKIBBEN, T MCKINLEY, J MELANSON, HL NETO, JRTD MERRITT, KW MIETTINEN, H MILDER, A MILNER, C MINCER, A DEMIRANDA, JM MISHRA, CS MOHAMMADIBAARMAND, M MOKHOV, N MONDAL, NK MONTGOMERY, HE MOONEY, P MUDAN, M MURPHY, C MURPHY, CT NANG, F NARAIN, M NARASIMHAM, VS NARAYANAN, A NEAL, HA NEGRET, JP NEIS, E NEMETHY, P NESIC, D NORMAN, D OESCH, L OGURI, V OLTMAN, E OSHIMA, N OWEN, D PADLEY, P PANG, M PARA, A PARK, CH PARK, YM PARTRIDGE, R PARUA, N PATERNO, M PERKINS, J PERYSHKIN, A PETERS, M PIEKARZ, H PISCHALNIKOV, Y PLUQUET, A PODSTAVKOV, VM POPE, BG PROSPER, HB PROTOPOPESCU, S PUSELJIC, D QIAN, J QUINTAS, PZ RAJA, R RAJAGOPALAN, S RAMIREZ, O RAO, MVS RAPIDIS, PA RASMUSSEN, L READ, AL REUCROFT, S RIJSSENBEEK, M ROCKWELL, T ROE, NA ROLDAN, JMR RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H SCHMID, D SCULLI, J SHABALINA, E SHAFFER, C SHANKAR, HC SHIVPURI, RK SHUPE, M SINGH, JB SIROTENKO, V SMART, W SMITH, A SMITH, RP SNIHUR, R SNOW, GR SNYDER, S SOLOMON, J SOOD, PM SOSEBEE, M SOUZA, M SPADAFORA, AL STEPHENS, RW STEVENSON, ML STEWART, D STOCKER, F STOIANOVA, DA STOKER, D STREETS, K STROVINK, M TAKETANI, A TAMBURELLO, P TARAZI, J TARTAGLIA, M TAYLOR, TL TEIGER, J THOMPSON, J TRIPPE, TG TUTS, PM VARELAS, N VARNES, EW VIRADOR, PRG VITITOE, D VOLKOV, AA VOROBIEV, AP WAHL, HD WANG, J WANG, LZ WARCHOL, J WAYNE, M WEERTS, H WENZEL, WA WHITE, A WHITE, JT WIGHTMAN, JA WILCOX, J WILLIS, S WIMPENNY, SJ WIRJAWAN, JVD WOLF, Z WOMERSLEY, J WON, E WOOD, DR XU, H YAMADA, R YAMIN, P YANAGISAWA, C YANG, J YASUDA, T YOSHIKAWA, C YOUSSEF, S YU, J YU, Y ZHANG, Y ZHOU, YH ZHU, Q ZHU, YS ZHU, ZH ZIEMINSKA, D ZIEMINSKI, A ZINCHENKO, A ZYLBERSTEJN, A TI SEARCH FOR SQUARKS AND GLUINOS IN P(P)OVER-BAR COLLISIONS AT ROOT-S=1.8 TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID FERMILAB TEVATRON GLUINO; SUPERSYMMETRIC PARTICLES; CASCADE DECAYS; MASS BOUNDS; COLLIDER; PHYSICS AB We present a search for events consistent with the production and decay of the squarks and gluinos of the minimal supersymmetric standard model (MSSM) in the D0 detector at the Fermilab Tevatron collider. We examined data for events containing large missing transverse energy and three or more jets. We observed no excess of events above the expected yield from standard model processes. For a choice of MSSM parameter values, we set a lower limit at the 95% confidence level on the mass of the gluino of 144 GeV/c(2) for all squark masses and a lower limit of 212 GeV/c(2) for equal squark and gluino masses. C1 UNIV LOS ANDES,BOGOTA,COLOMBIA. UNIV ARIZONA,TUCSON,AZ 85721. BROOKHAVEN NATL LAB,UPTON,NY 11973. BROWN UNIV,PROVIDENCE,RI 02912. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV CALIF IRVINE,IRVINE,CA 92717. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. CTR BRASILEIRO PESQUISAS FIS,LAFEX,RIO JANEIRO,BRAZIL. CTR INVEST & ESTUD AVANZADOS,MEXICO CITY,DF,MEXICO. COLUMBIA UNIV,NEW YORK,NY 10027. UNIV DELHI,DELHI 110007,INDIA. FLORIDA STATE UNIV,TALLAHASSEE,FL 32306. UNIV HAWAII,HONOLULU,HI 96822. UNIV ILLINOIS,CHICAGO,IL 60680. INDIANA UNIV,BLOOMINGTON,IN 47405. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. KOREA UNIV,SEOUL 136701,SOUTH KOREA. KYUNGSUNG UNIV,PUSAN,SOUTH KOREA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV MARYLAND,COLLEGE PK,MD 20742. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA. UNIV NEBRASKA,LINCOLN,NE 68588. NYU,NEW YORK,NY 10003. NORTHEASTERN UNIV,BOSTON,MA 02115. NO ILLINOIS UNIV,DE KALB,IL 60115. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV PANJAB,CHANDIGARH 160014,INDIA. INST HIGH ENERGY PHYS,PROTVINO 142284,RUSSIA. PURDUE UNIV,W LAFAYETTE,IN 47907. RICE UNIV,HOUSTON,TX 77251. UNIV ROCHESTER,ROCHESTER,NY 14627. CTR ETUD SACLAY,SERV PHYS PARTICULES,DAPNIA,CEA,SACLAY,FRANCE. SEOUL NATL UNIV,SEOUL,SOUTH KOREA. SUNY STONY BROOK,STONY BROOK,NY 11794. SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. TATA INST FUNDAMENTAL RES,BOMBAY 400005,MAHARASHTRA,INDIA. UNIV TEXAS,ARLINGTON,TX 76019. TEXAS A&M UNIV,COLLEGE STN,TX 77843. RP ABACHI, S (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. RI Taketani, Atsushi/E-1803-2017; Santoro, Alberto/E-7932-2014; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015; Peters, Michael/B-4973-2009; Aihara, Hiroaki/F-3854-2010; Shivpuri, R K/A-5848-2010; Leflat, Alexander/D-7284-2012; Klyukhin, Vyacheslav/D-6850-2012; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013; de Mello Neto, Joao/C-5822-2013 OI Taketani, Atsushi/0000-0002-4776-2315; Kim, Sun Kee/0000-0002-0013-0775; Aihara, Hiroaki/0000-0002-1907-5964; Klyukhin, Vyacheslav/0000-0002-8577-6531; De, Kaushik/0000-0002-5647-4489; de Mello Neto, Joao/0000-0002-3234-6634 NR 21 TC 104 Z9 104 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 618 EP 623 DI 10.1103/PhysRevLett.75.618 PG 6 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000007 ER PT J AU WALKER, B KALUZA, M SHEEHY, B AGOSTINI, P DIMAURO, LF AF WALKER, B KALUZA, M SHEEHY, B AGOSTINI, P DIMAURO, LF TI OBSERVATION OF CONTINUUM-CONTINUUM AUTLER-TOWNES SPLITTING SO PHYSICAL REVIEW LETTERS LA English DT Article ID IONIZATION; STATES AB Photoelectron energy spectra resulting from two-photon ionization of calcium atoms by 180 fs pulses have been studied as a function of wavelength (380-405 nm) and intensity (9-900 GW/cm(2)). When the wavelength is tuned near the 4s --> 4p or 4s --> 5s ionic core transition, the photoelectron peaks display a characteristic splitting proportional to the field strength and assignable to a two-electron continuum-continuum Autler-Townes effect. Spectra obtained by an essential-state model involving three coupled continua are compared to the experiment. C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. CTR ETUD SACLAY,SERV PHOTONS ATOMES & MOLECULES,F-91191 GIF SUR YVETTE,FRANCE. RP WALKER, B (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Walker, Barry/F-8532-2011 NR 10 TC 32 Z9 32 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 633 EP 636 DI 10.1103/PhysRevLett.75.633 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000010 ER PT J AU MCKEE, G FONCK, R STRATTON, B BELL, R BUDNY, R BUSH, C GREK, B JOHNSON, D PARK, H RAMSEY, A SYNAKOWSKI, E TAYLOR, G AF MCKEE, G FONCK, R STRATTON, B BELL, R BUDNY, R BUSH, C GREK, B JOHNSON, D PARK, H RAMSEY, A SYNAKOWSKI, E TAYLOR, G TI CONFINED ALPHA-DISTRIBUTION MEASUREMENTS IN A DEUTERIUM-TRITIUM TOKAMAK PLASMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID INDUCED ALFVEN EIGENMODES; PARTICLE LOSSES; CHERS; TFTR AB Fusion-produced alpha particles with energy less than or equal to 0.7 MeV have been spectroscopically observed in the core of a deuterium-tritium plasma in the TFTR tokamak at alpha densities of 3 x 10(16) m(-3). During a sawtooth-free discharge, the measured energy spectra at r/a = 0.3 are in good agreement with those predicted on the basis of collisional transport. Time-resolved measurements during the alpha thermalization after alpha source turn-off show decay of the distribution function to lower energies consistent with the classical slowing-down time of 0.5 s. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP MCKEE, G (reprint author), UNIV WISCONSIN,DEPT NUCL ENGN & ENGN PHYS,MADISON,WI 53706, USA. NR 17 TC 54 Z9 54 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 649 EP 652 DI 10.1103/PhysRevLett.75.649 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000014 ER PT J AU DOMINGUEZ, D GRONBECHJENSEN, N BISHOP, AR AF DOMINGUEZ, D GRONBECHJENSEN, N BISHOP, AR TI TRANSFORMER CONFIGURATION IN 3-DIMENSIONAL JOSEPHSON LATTICES AT ZERO MAGNETIC-FIELD SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TC SUPERCONDUCTORS; JUNCTION ARRAYS; XY-MODEL; CROSSOVER; VORTICES; STATE AB Recent experiments on Bi2Sr2CaCu2O8-y superconductors at zero magnetic field have been performed with a transformer configuration of contacts. We interpret the experimental data on the basis of large-scale Langevin dynamical simulations of a three dimensional (3D) Josephson lattice with a current bias through a single plane. We show that the experimentally observed effects can be attributed to linking thermal vortex loop excitations that cause voltages in neighboring superconducting planes to lock in a narrow temperature range near the 3D phase transition. C1 INT CTR THEORET PHYS,I-34100 TRIESTE,ITALY. RP DOMINGUEZ, D (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MS B262,LOS ALAMOS,NM 87545, USA. RI Dominguez, Daniel/E-9304-2016 OI Dominguez, Daniel/0000-0002-6204-0150 NR 29 TC 11 Z9 11 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 JUL 24 PY 1995 VL 75 IS 4 BP 717 EP 720 DI 10.1103/PhysRevLett.75.717 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000031 ER PT J AU ARONSON, MC OSBORN, R ROBINSON, RA LYNN, JW CHAU, R SEAMAN, CL MAPLE, MB AF ARONSON, MC OSBORN, R ROBINSON, RA LYNN, JW CHAU, R SEAMAN, CL MAPLE, MB TI NON-FERMI-LIQUID SCALING OF THE MAGNETIC RESPONSE IN UCU5-XPDX (X=1,1.5) SO PHYSICAL REVIEW LETTERS LA English DT Article ID BEHAVIOR; FLUCTUATIONS; TEMPERATURE; LATTICE; SYSTEMS; POINTS; STATE; UCU5 AB We have determined the magnetic response S(omega) of UCu5-xPdx (x = 1, 1.5) for temperatures T ranging from 12 to 300 K and energy transfers omega from 0.5 to 200 meV. S(omega) is virtually identical in the two compounds, displaying localized moment dynamics for omega greater than or similar to 25 meV. For omega < 25 meV, temperature provides the only energy scale for the magnetic excitations with the dynamical susceptibility described by a universal scaling function chi''(omega,T) similar to omega-(1/3)Z(omega/T). We argue that S(omega) represents critical scattering associated with a T=0 phase transition, whose origin lies with the magnetic screening of individual uranium ions. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NIST,DIV REACTOR RADIAT,GAITHERSBURG,MD 20899. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP ARONSON, MC (reprint author), UNIV MICHIGAN,HARRISON M RANDALL LAB PHYS,ANN ARBOR,MI 48109, USA. RI Osborn, Raymond/E-8676-2011 OI Osborn, Raymond/0000-0001-9565-3140 NR 36 TC 174 Z9 174 U1 2 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 725 EP 728 DI 10.1103/PhysRevLett.75.725 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000033 ER PT J AU ANTROPOV, VP KATSNELSON, MI VANSCHILFGAARDE, M HARMON, BN AF ANTROPOV, VP KATSNELSON, MI VANSCHILFGAARDE, M HARMON, BN TI AB-INITIO SPIN DYNAMICS IN MAGNETS SO PHYSICAL REVIEW LETTERS LA English DT Article ID DENSITY AB A set of coupled equations of motion for the evaluation of spin dynamics in magnets is introduced. This adiabatic approach considers the orientation of the local magnetic moments to be slowly varying relative to their magnitudes. The method is implemented within the local density approximation and applied to gamma-Fe, a frustrated system where we obtain new low energy magnetic configurations. C1 INST MET PHYS,SVERDLOVSK 620219,RUSSIA. SRI INT,MENLO PK,CA 94025. RP ANTROPOV, VP (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Katsnelson, Mikhail/D-4359-2012 NR 13 TC 124 Z9 124 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 24 PY 1995 VL 75 IS 4 BP 729 EP 732 DI 10.1103/PhysRevLett.75.729 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000034 ER PT J AU MARTIN, RL AF MARTIN, RL TI NUCLEAR-QUADRUPOLE RESONANCE-SPECTRUM OF LA2CUO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID LA2-XSRXCUO4; SUPERCONDUCTIVITY; CLUSTER; NMR; NQR AB I report the results of ab initio quantum chemistry calculations addressing the nuclear quadrupole resonance (NQR) spectra of hole-doped La2CuO4. The experimental spectra point to two Cu environments, with a main peak, corresponding to a predominantly d(9) Cu site, and a satellite at similar to 3 MHz higher frequency. The cluster calculations exhibit broken-symmetry solutions in which an additional hole localizes on a single CuO6 unit, and predict a satellite in the NQR spectrum 2.7 MHz above the main peak. The satellite corresponds to Cu sites neighboring a localized hole. I conclude that some (similar to 25%) of the holes doped in to La2-xSrxCuO4 are localized on the NQR time scale of similar to 1 mu sec. RP MARTIN, RL (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MSB268,LOS ALAMOS,NM 87545, USA. NR 17 TC 29 Z9 29 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 JUL 24 PY 1995 VL 75 IS 4 BP 744 EP 747 DI 10.1103/PhysRevLett.75.744 PG 4 WC Physics, Multidisciplinary SC Physics GA RK690 UT WOS:A1995RK69000038 ER PT J AU TOBIASON, JD DUNLOP, JR ROHLFING, EA AF TOBIASON, JD DUNLOP, JR ROHLFING, EA TI THE UNIMOLECULAR DISSOCIATION OF HCO - A SPECTROSCOPIC STUDY OF RESONANCE ENERGIES AND WIDTHS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LASER-INDUCED-FLUORESCENCE; CO REVERSIBLE HCO; IONIZATION SPECTROSCOPY; STATE DISTRIBUTIONS; FANO PROFILES; RYDBERG STATE; FREE JETS; DCO; PHOTODISSOCIATION; DECOMPOSITION AB We use dispersed fluorescence (DF) and stimulated emission pumping (SEP) spectroscopies on the B ($) over tilde (2)A'-X ($) over tilde (2)A' system of jet-cooled HCO to measure the vibrational energies, resonance widths, and relative fluorescence intensities of 73 bound and resonance states supported by the ground-state potential energy surface. The SEP experiments use both two-color resonant four-wave mixing (RFWM-SEP) and the more conventional technique in which SEP signals are obtained from fluorescence depletion (ED-SEP). Where applicable, RFWM-SEP provides superior spectra to those obtained with ED-SEP which is susceptible to saturation broadening that can prevent accurate determinations of resonance widths. The observed bound and resonance states span an energy range of 2000-21 000 cm(-1) and comprise a wide range of vibrational excitation among the three vibrational modes, including states with 1-12 quanta of excitation in the C-O stretch, 0-5 quanta of bending excitation, and 0-1 quanta of excitation in the C-H stretch. The widths are markedly mode-specific and often display striking, nonmonotonic variations with increasing C-O stretch excitation. We compare our results to those of previous DF and SEP studies and to recent dynamical calculations of resonance energies and widths that use realistic potential surfaces derived from ab initio calculations. The resonance widths are particularly sensitive gauges of the unimolecular dissociation dynamics and provide stringent tests of theoretical potential surfaces. (C) 1995 American Institute of Physics. RP TOBIASON, JD (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 70 TC 131 Z9 131 U1 1 U2 8 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 JUL 22 PY 1995 VL 103 IS 4 BP 1448 EP 1469 DI 10.1063/1.470699 PG 22 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RK378 UT WOS:A1995RK37800021 ER PT J AU HOOVER, WG KUM, O OWENS, NE AF HOOVER, WG KUM, O OWENS, NE TI ACCURATE SYMPLECTIC INTEGRATORS VIA RANDOM SAMPLING SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article AB We develop a random-sampling method for finding accurate symplectic integrators which best match the exact trajectory of a one-dimensional harmonic oscillator. We recover several well-known algorithms. We demonstrate the usefulness of the random sampling method by finding and validating a new integrator, applying it to the classical many-body problem. (C) 1994 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HOOVER, WG (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,LIVERMORE,CA 94551, USA. NR 9 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 1995 VL 103 IS 4 BP 1530 EP 1532 DI 10.1063/1.469774 PG 3 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RK378 UT WOS:A1995RK37800028 ER PT J AU NATH, SK MCCOY, JD DONLEY, JP CURRO, JG AF NATH, SK MCCOY, JD DONLEY, JP CURRO, JG TI A MODIFIED SELF-CONSISTENT-FIELD THEORY - APPLICATION TO A HOMOPOLYMER MELT NEAR A HARD-WALL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID INTEGRAL-EQUATION THEORY; NONUNIFORM POLYATOMIC SYSTEMS; DENSITY FUNCTIONAL THEORY; BLOCK COPOLYMER THEORY; LOCAL-STRUCTURE; POLYMER MELTS; CHAINS; POLYETHYLENE; FORMULATION; SURFACES AB A modified self-consistent-held (SCF) theory is introduced and applied to hard-site Gaussian chains at meltlike density in contact with a hard wall. The traditional Edwards, quantum theoretical approach to inhomogeneous polymeric systems is used, but the solvent induced potential is calculated by density functional (DF) methods where the polymer reference interaction site model (PRISM) theory is used to calculate the ''input'' for the potential calculation. Specific calculations were performed with DF theory, Helfand-Tagami SCF theory, and modified-SCF theory. It is seen that the modified-SCF theory is capable of capturing the major structural features predicted by DF theory, and it promises to be a useful bridge between the SCF and DF theories. (C) 1995 American Institute of Physics. C1 NEW MEXICO INST MIN & TECHNOL,DEPT MAT & MET ENGN,SOCORRO,NM 87801. UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90024. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI McCoy, John/B-3846-2010 OI McCoy, John/0000-0001-5404-1404 NR 38 TC 17 Z9 17 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 1995 VL 103 IS 4 BP 1635 EP 1640 DI 10.1063/1.469735 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RK378 UT WOS:A1995RK37800041 ER PT J AU HOOVER, WG KUM, O AF HOOVER, WG KUM, O TI VIBRATIONAL PROPERTIES OF SMALL 2-DIMENSIONAL CLASSICAL CRYSTALS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Note RP HOOVER, WG (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT APPL SCI,LIVERMORE,CA 94551, USA. NR 10 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 22 PY 1995 VL 103 IS 4 BP 1718 EP 1719 DI 10.1063/1.469743 PG 2 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RK378 UT WOS:A1995RK37800050 ER PT J AU MAYER, K HANSEN, P TAYLOR, PDP DEBIEVRE, P PERRIN, RE FIEDLER, R ROKOP, DJ AF MAYER, K HANSEN, P TAYLOR, PDP DEBIEVRE, P PERRIN, RE FIEDLER, R ROKOP, DJ TI A RECOMMENDED DATA TRANSFER PROTOCOL FOR ISOTOPE MASS-SPECTROMETRIC MEASUREMENT DATA SO INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES LA English DT Article DE DATA TRANSFER PROTOCOL; ISOTOPE MASS SPECTROMETRIC MEASUREMENT DATA; RAW DATA OUTPUT FILE AB The structure and contents of a raw data output file are proposed to provide isotope mass spectrometrists with a common basis for data exchange. This applies to thermal ionisation mass spectrometry and to gas source mass spectrometry. The definition of the contents of this file is based on the experience gained in three different laboratories under the constraints of the very different tasks these laboratories have to fulfil. The information contained in this file enables the analyst to evaluate critically and completely the measurement data, establishing the necessary flexibility by providing all the information needed for calculating the final result. C1 INT ATOM ENERGY AGCY,SAFEGUARDS ANALYT LAB,A-2444 SEIBERSDORF,AUSTRIA. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. RP MAYER, K (reprint author), COMMISS EUROPEAN COMMUNITIES,JOINT RES CTR,INST REFERENCE MAT & MEASUREMENTS,B-2440 GEEL,BELGIUM. NR 0 TC 2 Z9 2 U1 0 U2 0 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 JUL 21 PY 1995 VL 145 IS 1-2 BP 117 EP 122 DI 10.1016/0168-1176(95)04171-G PG 6 WC Physics, Atomic, Molecular & Chemical; Spectroscopy SC Physics; Spectroscopy GA RM312 UT WOS:A1995RM31200011 ER PT J AU SHERWOOD, P SEDDON, EA GUEST, MF PARKINGTON, MJ RYAN, TA SEDDON, KR AF SHERWOOD, P SEDDON, EA GUEST, MF PARKINGTON, MJ RYAN, TA SEDDON, KR TI THE ELECTRONIC-STRUCTURE OF THE CARBONYL DIHALIDES, COF2, COCL2, COBR2, COCLF, COBRF AND COBRCL - A COMBINED COMPUTATIONAL AND EXPERIMENTAL-STUDY SO JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS LA English DT Article ID DANCOFF APPROXIMATION 2PH-TDA; PHOTOELECTRON SPECTROSCOPY; AROMATIC MOLECULES; BASIS-SETS; ATOMS; CHLOROFLUOROMETHANES; STRATOSPHERE; FLUORIDE AB The He-I, -II photoelectron (PE) spectra of the carbonyl dihalides, COF2, COCl2 and COBr2, and the He I spectra of the mixed carbonyl halides COCIF, COBrF and COBrCl have been recorded. The assignments of the photoelectron peaks are discussed with reference to ab initio electronic structure calculations in the Hartree-Fock. configuration interaction (CI) and Green's function (OVGF and 2ph-TDA) formalisms and the preferred assignments tabulated. Koopmans' theorem results in a systematic overestimate of the ionisation energies whereas the two Green's function methods give ionisation energies in very good agreement with the spectra, with errors of as little as 0.3 eV for the outer valence orbitals. A long standing problem with the assignments of the photoelectron spectra of COCl2 was resolved by the use of multi-reference CI calculations on the low-lying states-of the ion. The trends. in the halogen-dependent ionisation energies are discussed in terms of the halide inductive effects and the energies of the halogen lone-pair orbitals relative to the pi-bonding orbital of CO. C1 PACIFIC NW LAB, ENVIRONM & MOLEC SCI LAB, RICHLAND, WA 99352 USA. UNIV SUSSEX, SCH CHEM & MOLEC SCI, BRIGHTON BN1 9QJ, E SUSSEX, ENGLAND. ICI CHEM & POLYMERS LTD, RUNCORN WA7 4QD, CHESHIRE, ENGLAND. QUEENS UNIV BELFAST, SCH CHEM, BELFAST BT9 5AG, ANTRIM, NORTH IRELAND. RP SHERWOOD, P (reprint author), DARESBURY LAB, WARRINGTON WA4 4AD, CHESHIRE, ENGLAND. RI Sherwood, Paul/B-9033-2012 OI Sherwood, Paul/0000-0002-4611-5052 NR 41 TC 4 Z9 4 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0300-9246 J9 J CHEM SOC DALTON JI J. Chem. Soc.-Dalton Trans. PD JUL 21 PY 1995 IS 14 BP 2359 EP 2367 DI 10.1039/dt9950002359 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA RL310 UT WOS:A1995RL31000005 ER PT J AU BOGUSLAVSKY, L KALASH, H XU, Z BECKLES, D GENG, L SKOTHEIM, T LAURINAVICIUS, V LEE, HS AF BOGUSLAVSKY, L KALASH, H XU, Z BECKLES, D GENG, L SKOTHEIM, T LAURINAVICIUS, V LEE, HS TI THIN-FILM BIENZYME AMPEROMETRIC BIOSENSORS BASED ON POLYMERIC REDOX MEDIATORS WITH ELECTROSTATIC BIPOLAR PROTECTING LAYER SO ANALYTICA CHIMICA ACTA LA English DT Article DE AMPEROMETRY; BIOSENSORS; REDOX POLYMERS; FERROCENE; GLUCOSE; CHOLESTEROL ID DIRECT ELECTRICAL COMMUNICATION; CHEMICALLY MODIFIED ELECTRODES; CARBON PASTE ELECTRODE; GLUCOSE-OXIDASE; ENZYME ELECTRODE; METAL-ELECTRODES; IMMOBILIZATION; POLYPYRROLE; DEHYDROGENASE; BENZOQUINONE AB Amperometric bienzyme sensors were constructed based on solid graphite electrodes modified with polymer redox mediator, horseradish peroxidase and a variety of oxidases and covered with a bipolar electrostatic protective layer. Glucose, ethanol, choline, glycero-3-phosphate and cholesterol sensors were designed and operated at 0 mV vs. Ag/AgCl using single potential step chronoamperometry. The protection of the sensor against interference from ascorbic acid and linearity of response were provided by a bipolar electrostatic layer. Sensitivities as high as 0.74 mu A cm(-2) mM(-1) of glucose, 0.71 mu A cm(-2) mM(-1) of ethanol 5.7 mu A cm(2) mM(-1) of glycerol-1-phosphate, and 28.3 nA cm(-2) per 10 mu M of choline, were achieved. C1 INST BIOCHEM,VILNIUS 2021,LITHUANIA. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP BOGUSLAVSKY, L (reprint author), MOLTECH CORP,25 E LOOP RD,STONY BROOK,NY 11790, USA. NR 41 TC 38 Z9 42 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD JUL 20 PY 1995 VL 311 IS 1 BP 15 EP 21 DI 10.1016/0003-2670(95)00168-Y PG 7 WC Chemistry, Analytical SC Chemistry GA RL317 UT WOS:A1995RL31700002 ER PT J AU HUNTER, BV BICKEL, WS AF HUNTER, BV BICKEL, WS TI GEOMETRY-INDUCED FLUORESCENCE RESONANCES IN SMALL LOSSY CAPILLARIES SO APPLIED OPTICS LA English DT Article ID MORPHOLOGY-DEPENDENT RESONANCES; GALLERY-MODE LASER; ZONE ELECTROPHORESIS; EMISSION; SCATTERING; ENHANCEMENT; DROPLETS; FIBER AB We report the first experimental demonstration of cavity-induced resonances that occur without total internal reflection. We obtained these resonances by observing the fluorescence spectrum from the molecules enclosed within a small, lossy capillary of the type used for capillary zone electrophoresis. Even with weak reflections from the capillary inner walls, enough feedback exists to superimpose resonances on the otherwise smooth fluorescence spectrum. These resonances, commonly called morphology-dependent resonances or whispering-gallery modes, have typically been observed only in cavities in which total internal reflection is present. C1 UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721. RP HUNTER, BV (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,BLDG 207,ARGONNE,IL 60439, USA. NR 21 TC 1 Z9 1 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JUL 20 PY 1995 VL 34 IS 21 BP 4240 EP 4247 PG 8 WC Optics SC Optics GA RL129 UT WOS:A1995RL12900009 PM 21052251 ER PT J AU MONCUR, NK JOHNSON, RP WATT, RG GIBSON, RB AF MONCUR, NK JOHNSON, RP WATT, RG GIBSON, RB TI TRIDENT - A VERSATILE HIGH-POWER ND-GLASS LASER FACILITY FOR INERTIAL CONFINEMENT FUSION EXPERIMENTS SO APPLIED OPTICS LA English DT Article DE ND, GLASS LASER; FUSION LASER; INERTIAL CONFINEMENT FUSION AB The Trident Nd:glass laser system operates as an experimental facility supporting the national Inertial Confinement Fusion program at Los Alamos. The laser has two identical main beam lines with 14-cm-disk final amplifiers. The beams are frequency doubled, expanded to 19.2 cm, and focused on target with a variety of focusing optics. A third beam with 10-cm disk final amplifiers is also frequency doubled and used as a target-shooting or diagnostic beam simultaneously with the other two beams. The facility provides a flexible combination of energy, pulse-shaping capabilities, and diagnostic tools for laser-target interaction experiments. C1 UNIV MICHIGAN,CTR ULTRAFAST OPT SCI,ANN ARBOR,MI 48109. RP MONCUR, NK (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 13 TC 63 Z9 63 U1 0 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JUL 20 PY 1995 VL 34 IS 21 BP 4274 EP 4283 PG 10 WC Optics SC Optics GA RL129 UT WOS:A1995RL12900015 PM 21052257 ER PT J AU JEDAMZIK, K AF JEDAMZIK, K TI THE CLOUD-IN-CLOUD PROBLEM IN THE PRESS-SCHECHTER FORMALISM OF HIERARCHICAL STRUCTURE FORMATION SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, THEORY; LARGE-SCALE STRUCTURE OF UNIVERSE ID COLD DARK-MATTER; GALAXY CLUSTERS; MASS FUNCTION; EVOLUTION; STATISTICS; UNIVERSE; HALOES AB The formalism by Press and Schechter (PS) is often used to infer number densities of virialized objects of mass M (e.g., quasars, galaxies, clusters of galaxies, etc.) from a count of initially overdense regions in a Gaussian density perturbation field. We reanalyze the PS formalism by explicitly counting underdense regions which are embedded within overdense regions, so-called cloud-in-clouds. In contrast to the original PS formalism, our revised analysis automatically accounts for all the cosmic material. We find that mass distribution functions for virialized objects are altered by the solution of the cloud-in-cloud problem. These altered distribution functions agree much better with distribution functions inferred from N-body simulations than the original PS distribution functions. RP JEDAMZIK, K (reprint author), LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,PHYS RES PROGRAM,LIVERMORE,CA 94550, USA. NR 30 TC 44 Z9 44 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 JUL 20 PY 1995 VL 448 IS 1 BP 1 EP 7 DI 10.1086/175936 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ489 UT WOS:A1995RJ48900001 ER PT J AU BERSANELLI, M BENSADOUN, M DANESE, L DEAMICI, G KOGUT, A LEVIN, S LIMON, M MAINO, D SMOOT, GF WITEBSKY, C AF BERSANELLI, M BENSADOUN, M DANESE, L DEAMICI, G KOGUT, A LEVIN, S LIMON, M MAINO, D SMOOT, GF WITEBSKY, C TI EFFECTS OF ATMOSPHERIC EMISSION ON GROUND-BASED MICROWAVE BACKGROUND MEASUREMENTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATMOSPHERIC EFFECTS; COSMIC MICROWAVE BACKGROUND; EARTH ID RADIATION TEMPERATURE; SCALE MEASUREMENT; SOUTH-POLE; 7.5 GHZ; WAVELENGTH; FREQUENCY; SPECTRUM; RANGE AB We present an analysis of multifrequency measurements of atmospheric emission in the Rayleigh-jeans portion of the cosmic microwave background spectrum (1-90 GHz) taken since 1986 from White Mountain, CA, and from the South Pole. Correlations of simultaneous data at 10 and 90 GHz and accurate low-frequency measurements show good agreement with model predictions for both sites. Our data from the South Pole 1989 campaign combined with real-time measurements of the local atmospheric profiles provide accurate verification of the expected independent contributions of H2O and O-2 emission. We show that variations on the order of 10% of the oxygen emission (both resonant and nonresonant components) are present on timescales of hours to days, mainly due to the evolution of the atmospheric pressure profile. Oxygen emission fluctuations appear larger than previously expected and may have significant consequences for ground-based cosmic microwave background experiments. C1 UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. SCUOLA INT SUPER STUDI AVANZATI,I-34014 TRIESTE,ITALY. NASA,GODDARD SPACE FLIGHT CTR,HUGHES STX,GREENBELT,MD 20771. CALTECH,JET PROP LAB,PASADENA,CA 91109. RP BERSANELLI, M (reprint author), CNR,IST FIS COSM,VIA BASSINI 15,I-20133 MILAN,ITALY. RI Kogut, Alan/D-6293-2012 NR 37 TC 6 Z9 6 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 JUL 20 PY 1995 VL 448 IS 1 BP 8 EP 16 DI 10.1086/175937 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ489 UT WOS:A1995RJ48900002 ER PT J AU HECKMAN, TM DAHLEM, M LEHNERT, MD FABBIANO, G GILMORE, D WALLER, WH AF HECKMAN, TM DAHLEM, M LEHNERT, MD FABBIANO, G GILMORE, D WALLER, WH TI AN X-RAY AND OPTICAL STUDY OF THE DWARF GALAXY NGC-1569 - EVIDENCE FOR A STARBURST-DRIVEN OUTFLOW SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, HALOS; GALAXIES, INDIVIDUAL (NGC 1569); GALAXIES, KINEMATICS AND DYNAMICS; GALAXIES, STARBURST; X-RAYS, GALAXIES ID ENHANCED GALACTIC WINDS; LOW-MASS GALAXIES; IRREGULAR GALAXIES; INTERSTELLAR-MEDIUM; STELLAR POPULATIONS; ELLIPTICAL GALAXIES; STAR FORMATION; VIRGO CLUSTER; EVOLUTION; NGC-1569 AB Supernova-driven outflows produced by intense bursts of star formation can drastically affect the structure and subsequent evolution of dwarf galaxies. Extensive mass loss from such systems may also provide an important source of chemical enrichment for the intergalactic medium. Despite the potential importance of these outflows, there is a very limited amount of direct observational evidence for their existence. One of the clearest signatures of a starburst-driven outflow is the X-ray emission from the hot gas that drives the outflow. We have therefore undertaken an X-ray imaging and optical spectroscopic investigation of the nearest and best-studied starbursting dwarf galaxy NGC 1569 using the HRI on ROSAT and the Ritchey-Chretien spectrograph on the KPNO 4 m telescope, respectively. We find that at least half the keV X-ray emission of NGC 1569 is associated with a diffuse halo that is some 3.'8 x 2.'2 similar to 2.4 x 1.5 kpc in size. Kiloparsec-scale ''spurs'' of diffuse X-ray emission extend outward along or near the optical minor axis of the galaxy. These diffuse X-ray spurs are morphologically associated with the well-known system of H alpha filaments. Previous kinematic studies have suggested that the H alpha filament system is a bipolar outflow. Our new optical spectroscopic data show that the H alpha emission comprises two kinematically distinct components: a quiescent system about 1 kpc in size responsible for about 75% of the H alpha emission and a fainter and more complex system over 2 kpc in size with radial velocities of as much as +/-200 km s(-1) relative to v(sys). The latter appears to define expanding hollow structures consisting of several kiloparsec-scale ''superbubbles.'' The dynamical age of the high-velocity system (similar to 10(7) yr) is similar to various estimates of the age of the starburst. We also see very broad wings (full width at zero intensity of 1400-2300 km s(-1)) on the H alpha emission-line profile at the location of super starcluster A, suggestive of recent supernova activity there. We argue that the starburst in NGC 1569 is driving an outflow of the interstellar medium on a global scale. Our simple models suggest that the X-ray emission is too bright to come primarily from the hot tenuous supernova-heated gas in the interior of a superbubble, unless this gas is evaporating or ablating cool dense material. This latter material may be the outer shell of the superbubble or interstellar clouds that have been engulfed by the superbubble. The high-velocity H alpha filaments probably correspond to the shocked and accelerated ambient material in the superbubble's outer walls, while the low-velocity material may be massive photoionized clouds in the starbursting galactic disk. The observed expansion speeds probably exceed the galactic escape velocity. It seems likely that the expanding material will ultimately ''blow out'' of the interstellar medium, and in so doing may allow most of the metals created by the starburst to escape from the galaxy. It is less clear whether the outflow will lead to the ejection of most or ah of this galaxy's interstellar medium, though it appears at least energetically feasible. We briefly discuss the significance of these results for ideas about the evolution of dwarf galaxies. C1 LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, LIVERMORE, CA 94551 USA. HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA. SPACE TELESCOPE SCI INST, BALTIMORE, MD 21218 USA. NASA, GODDARD SPACE FLIGHT CTR, ASTRON & SOLAR PHYS LAB, HUGHES STX CORP, GREENBELT, MD 20771 USA. RP HECKMAN, TM (reprint author), JOHNS HOPKINS UNIV, DEPT PHYS & ASTRON, BALTIMORE, MD 21218 USA. NR 100 TC 129 Z9 129 U1 0 U2 2 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 JUL 20 PY 1995 VL 448 IS 1 BP 98 EP 118 DI 10.1086/175944 PN 1 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ489 UT WOS:A1995RJ48900009 ER PT J AU VANRIPER, KA LINK, B EPSTEIN, RI AF VANRIPER, KA LINK, B EPSTEIN, RI TI FRICTIONAL HEATING AND NEUTRON-STAR THERMAL EVOLUTION SO ASTROPHYSICAL JOURNAL LA English DT Article DE DENSE MATTER; STARS, EVOLUTION; STARS, INTERIORS; STARS, NEUTRON; STARS, X-RAYS ID X-RAY OBSERVATIONS; SUPER-NOVA REMNANT; VORTEX CREEP; INTERNAL TEMPERATURE; MODEL ATMOSPHERES; DRIP SUPERFLUID; PULSAR GLITCHES; BETA-DECAY; MATTER; EQUATION AB Differential rotation between the neutron star crust and a more rapidly rotating interior superfluid leads to frictional heating that effects the star's long-term thermal evolution and resulting surface emission. The frictional heating rate is determined by the mobility of the vortex lines that thread the rotating superfluid and pin to the inner crust lattice. If vortex pinning is relatively strong, a large velocity difference develops between the inner crust superfluid and the crust, leading to a high rate of heat generation by friction. Here we present the results of thermal evolution simulations based on two models of the vortex pinning forces that bracket a range of plausible pinning strengths. We include the effects of superfluidity, magnetic fields, and temperature gradients. As representative standard and accelerated neutrino emission processes taking place in the core, we consider the modified Urea process in normal baryonic matter, and the much faster quark Urea process. Comparison of our results with neutron star surface temperature data, including the recent temperature measurement of the Geminga pulsar, shows that stars with soft equations of state and modest frictional heating are in closest agreement with the data; stars with stronger frictional heating have temperatures inconsistent with the upper limit of PSR 1929+10. Stiffer stars undergoing standard cooling generally have temperatures lying above the Vela detection, a situation worsened by the inclusion of frictional heating. Stars undergoing accelerated cooling without frictional heating have temperatures that fall far below most temperature measurements; the Vela and Geminga detections being the most compelling examples. Only in stiff stars, which have thick crusts, can the inclusion of strong frictional heating raise the temperature at late stages in the evolution to a level consistent with the data. However, such a large amount of heating leads to a temperature at similar to 1000 yr in excess of the Crab upper limit. Suppression of accelerated neutrino emission processes, perhaps by superfluid pairing in the core, may yield acceptable cooling models. C1 MONTANA STATE UNIV, DEPT PHYS, BOZEMAN, MT 59717 USA. RP VANRIPER, KA (reprint author), LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NR 71 TC 35 Z9 35 U1 0 U2 0 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 JUL 20 PY 1995 VL 448 IS 1 BP 294 EP 304 DI 10.1086/175961 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ489 UT WOS:A1995RJ48900026 ER PT J AU WOOSLEY, SE LANGER, N WEAVER, TA AF WOOSLEY, SE LANGER, N WEAVER, TA TI THE PRESUPERNOVA EVOLUTION AND EXPLOSION OF HELIUM STARS THAT EXPERIENCE MASS-LOSS SO ASTROPHYSICAL JOURNAL LA English DT Article DE NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES; STARS, EVOLUTION; STARS, INTERIORS; STARS, MASS LOSS; SUPERNOVAE, GENERAL ID WOLF-RAYET STARS; M-CIRCLE-DOT; STELLAR MODELS; BINARY-SYSTEM; IB SUPERNOVAE; LIGHT CURVES; SN-1987A; NUCLEOSYNTHESIS; METALLICITY; ABUNDANCES AB The evolution of helium stars with initial masses in the range 4-20 M. is followed through all stages of hydrostatic nuclear burning. We identify these objects as Wolf-Rayet stars that have lost their hydrogen envelopes, either before or early in their helium-burning phase, probably because they were in a mass-exchanging binary system or, for the more massive stars, because they were subject to a strong stellar wind. Stripped of their envelopes, these stars are subject to efficient (mass-dependent) mass loss. As a result, the final masses converge to a narrow range of small values: 2.26-3.55 M. for all stars considered. We identify these as progenitors of Type Ib and, perhaps, Type Ic supernovae and investigate the dependence of the presupernova structure on the initial mass of the helium star. For two models, the extra mass loss that could occur in a close binary, the product of common envelope evolution, is also considered. Five of our presupernova models are then exploded, using pistons, and their nucleosynthesis and bolometric light curves calculated. Peak luminosities are in the range (1.5-4) x 10(42) ergs s(-1). The (unmodified) mass of Ni-56 for 10 explosions (variable parameterizations of explosion in the five stars) lies in a narrow range, 0.07-0.15 M. Other abundances. from carbon through nickel are coproduced in approximately solar proportions along with interesting amounts of the long-lived radioactivities, Al-26 and Fe-60. The light curves agree reasonably well with observations of Type Ib and Ic supernovae, including Type Ib SN 1983N and the recent Type Ic SN 1994I. A Ni-56 mass of 0.05(-0.01)(+0.02) M. is derived for the latter (for a distance of 7 Mpc), and speculations are presented regarding SN 1998bg. Ultimately, spectroscopic diagnostics of these models should aid in testing them. C1 LAWRENCE LIVERMORE NATL LAB, DEPT PHYS, DIV GEN STUDIES, LIVERMORE, CA 94550 USA. MAX PLANCK INST ASTROPHYS, D-85740 GARCHING, GERMANY. RP WOOSLEY, SE (reprint author), UNIV CALIF SANTA CRUZ, UNIV CALIF OBSERV, LICK OBSERV, BOARD STUDIES ASTRON & ASTROPHYS, SANTA CRUZ, CA 95064 USA. NR 72 TC 229 Z9 231 U1 0 U2 4 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 JUL 20 PY 1995 VL 448 IS 1 BP 315 EP 338 DI 10.1086/175963 PN 1 PG 24 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ489 UT WOS:A1995RJ48900028 ER PT J AU ALLEN, GE BERLEY, D BILLER, S BURMAN, RL CAVALLISFORZA, M CHANG, CY CHEN, ML CHUMNEY, P COYNE, D DION, CL DORFAN, D ELLSWORTH, RW GOODMAN, JA HAINES, TJ HOFFMAN, CM KELLEY, L KLEIN, S SCHMIDT, DM SCHNEE, R SHOUP, A SINNIS, C STARK, MJ WILLIAMS, DA WU, JP YANG, T YODH, GB AF ALLEN, GE BERLEY, D BILLER, S BURMAN, RL CAVALLISFORZA, M CHANG, CY CHEN, ML CHUMNEY, P COYNE, D DION, CL DORFAN, D ELLSWORTH, RW GOODMAN, JA HAINES, TJ HOFFMAN, CM KELLEY, L KLEIN, S SCHMIDT, DM SCHNEE, R SHOUP, A SINNIS, C STARK, MJ WILLIAMS, DA WU, JP YANG, T YODH, GB TI A SEARCH FOR ULTRA-HIGH-ENERGY GAMMA-RAY EMISSION FROM 5 SUPERNOVA-REMNANTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GAMMA RAYS, OBSERVATIONS; SUPERNOVAE, GENERAL ID COSMIC-RAYS; MAXIMUM ENERGY; ACCELERATION; RADIATION; SHOCKS; ORIGIN AB The majority of the cosmic rays in our Galaxy with energies in the range of similar to 10(l0)-10(14) eV are thought to be accelerated in supernova remnants (SNRs). Measurements of SNR gamma-ray spectra in this energy region could support or contradict this concept. The Energetic Gamma-Ray Experiment Telescope (EGRET) collaboration has reported six sources of gamma rays above 10(8) eV whose coordinates are coincident with SNRs. Five of these sources are within the field of view of the CYGNUS extensive air shower detector. A search of the CYGNUS data set reveals no evidence of gamma-ray emission at energies similar to 10(14) eV for these five SNRs. The flux upper limits from the CYGNUS data are compared to the lower energy fluxes measured with the EGRET detector using Drury, Aharonian, and Volk's recent model of gamma-ray production in the shocks of SNRs. The results suggest one or more of the following: (1) the gamma-ray spectra for these five SNRs soften by about 10(14) eV, (2) the integral gamma-ray spectra of the SNRs are steeper than about E(-13), Or (3) most of the gamma rays detected with the EGRET instrument for each SNR are not produced in the SNR's shock but are produced at some other site (such as a pulsar). C1 NATL SCI FDN,WASHINGTON,DC 20550. UNIV CALIF IRVINE,IRVINE,CA 92717. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. UNIV AUTONOMA BARCELONA,INST FIS ALTES ENERGIES,E-08193 BARCELONA,SPAIN. GEORGE MASON UNIV,FAIRFAX,VA 22030. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. RP ALLEN, GE (reprint author), UNIV MARYLAND,COLLEGE PK,MD 20742, USA. RI Cavalli-Sforza, Matteo/H-7102-2015 NR 24 TC 19 Z9 19 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 JUL 20 PY 1995 VL 448 IS 1 BP L25 EP L28 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RJ490 UT WOS:A1995RJ49000007 ER PT J AU HOWARD, AJ BACA, AG SHUL, RJ AF HOWARD, AJ BACA, AG SHUL, RJ TI INTERLEVEL DIELECTRIC VIA ETCH PROCESS MONITORING BY ATOMIC-FORCE MICROSCOPY SO ELECTRONICS LETTERS LA English DT Article DE ATOMIC FORCE MICROSCOPY; INTEGRATED CIRCUIT TECHNOLOGY AB The use of AFM for in-line monitoring of an interlevel dielectric via plasma etching step is reported. By comparing etch depths, to via types contacting bath Au- and W-based metals, the AFM can non-destructively determine whether micrometre-sized vias have been cleared. Owing to the etch selectivity of the SF6/O-2 plasma, the Au-based ohmic metal acts as an etch stop whereas the W-based refractory gate contact continues to etch. RP HOWARD, AJ (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 2 TC 1 Z9 1 U1 0 U2 0 PU IEE-INST ELEC ENG PI HERTS PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTS, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JUL 20 PY 1995 VL 31 IS 15 BP 1227 EP 1228 DI 10.1049/el:19950843 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA RM218 UT WOS:A1995RM21800014 ER PT J AU BLUM, O FRITZ, IJ DAWSON, LR DRUMMOND, TJ AF BLUM, O FRITZ, IJ DAWSON, LR DRUMMOND, TJ TI DIGITAL ALLOY ALASSB/ALGAASSB DISTRIBUTED BRAGG REFLECTORS LATTICE-MATCHED TO INP FOR 1.3-1.55-MU-M WAVELENGTH RANGE SO ELECTRONICS LETTERS LA English DT Article DE DISTRIBUTED BRAGG REFLECTOR LASERS; LASERS AB The authors report a distributed Bragg reflector (DBR) consisting of 15.5 periods of AlAsSb and AlGaAsSb digital alloy with a peak reflectivity >95% at 1.46 mu m. The DBR is grown by molecular beam epitaxy on an InP substrate. RP BLUM, O (reprint author), SANDIA NATL LABS,DEPT 1312,MS0603,ALBUQUERQUE,NM 87185, USA. NR 6 TC 24 Z9 24 U1 1 U2 1 PU IEE-INST ELEC ENG PI HERTS PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTS, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JUL 20 PY 1995 VL 31 IS 15 BP 1247 EP 1248 DI 10.1049/el:19950852 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA RM218 UT WOS:A1995RM21800028 ER PT J AU STAUB, U OSBORN, R BALCAR, E SODERHOLM, L TROUNOV, V AF STAUB, U OSBORN, R BALCAR, E SODERHOLM, L TROUNOV, V TI CRYSTAL FIELD-SPLIT INTERMULTIPLET TRANSITIONS AND THEIR Q-DEPENDENCE IN EUBA2CU3O7 SO EUROPHYSICS LETTERS LA English DT Article ID RARE-EARTH IONS; NEUTRON; SPECTROSCOPY; EXCITATIONS; ERBA2CU3OX AB Crystalline electric-field (CEF) splittings within higher J-multiplets have been determined by means of inelastic neutron scattering in EuBa2Cu3O7. An unusually low-energy separation between een the J = 0 ground state and the first excited J = 1 multiplet was observed indicating changes in the free-ion interaction compared to EU(3+) in,insulating systems, e.g., Eu:LaF3. The Q-dependence of the different dipolar and quadrupolar transitions are calculated and compared with the observations. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV VIENNA,ATOMINST,A-1020 VIENNA,AUSTRIA. RUSSIAN ACAD SCI,INST NUCL PHYS,GATCHINA 188350,RUSSIA. RI Osborn, Raymond/E-8676-2011; Staub, Urs/C-4914-2015 OI Osborn, Raymond/0000-0001-9565-3140; NR 17 TC 3 Z9 3 U1 0 U2 1 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 JUL 20 PY 1995 VL 31 IS 3 BP 175 EP 180 DI 10.1209/0295-5075/31/3/009 PG 6 WC Physics, Multidisciplinary SC Physics GA RM899 UT WOS:A1995RM89900009 ER PT J AU KURIMASA, A SUZUKI, N KUMANO, S LI, H WELLS, D WAGNER, MJ CHEN, FQ CHEN, DJ OSHIMURA, M AF KURIMASA, A SUZUKI, N KUMANO, S LI, H WELLS, D WAGNER, MJ CHEN, FQ CHEN, DJ OSHIMURA, M TI CONSTRUCTION OF 110 COSMID MARKERS AND A 4.5-MB YAC CONTIG ON HUMAN-CHROMOSOME 8P12-Q11 SO GENOMICS LA English DT Article ID WERNER SYNDROME; SCID MUTATION; RFLP MARKERS; HUMAN GENOME; YEAST; DNA; CLONES; REGION; IDENTIFICATION; SEPARATION AB Microcell hybrids containing various regions of human chromosome 8 were formed by microcell-mediated transfer of neo-tagged chromosome 8 into the cells derived from severe combined immunodeficiency (SCID) mouse. Thus, 110 cosmid markers were isolated from SV40-transformed SCID fibroblast cell line (SCVA) containing a p12-q11.1 region of human chromosome 8 and were assigned to eight regions in 8p12-q11.1, using a microcell-hybrid panel. For positional cloning of a human gene that restores the DNA-repair defect in a mouse with SCID on 8p11.1-q11.1 (SCID region), we constructed a yeast artificial chromosome (YAC) contig of about 4.5 Mb. Overlapping YACs were further aligned by restriction mapping, using rare-cutting restriction endonucleases. The cosmids and YAC contig should facilitate isolation of the SCID gene and other genes, such as the Werner syndrome-responsible gene in or near this region. (C) 1995 Academic Press, Inc. C1 TOTTORI UNIV,FAC MED,SCH LIFE SCI,DEPT MOLEC & CELL GENET,YONAGO,TOTTORI 683,JAPAN. UNIV HOUSTON,DEPT BIOL,HOUSTON,TX 77204. UNIV HOUSTON,INST MOLEC BIOL,HOUSTON,TX 77204. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. FU NCI NIH HHS [CA50519] NR 29 TC 4 Z9 4 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD JUL 20 PY 1995 VL 28 IS 2 BP 147 EP 153 DI 10.1006/geno.1995.1125 PG 7 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA RN465 UT WOS:A1995RN46500003 PM 8530020 ER PT J AU WATTS, PD ZAVODY, AM MUTLOW, CT BARTON, IJ MINNETT, PJ LLEWELLYNJONES, DT AF WATTS, PD ZAVODY, AM MUTLOW, CT BARTON, IJ MINNETT, PJ LLEWELLYNJONES, DT TI EFFECT OF SURFACE WIND-SPEED AND SENSOR VIEW ZENITH ANGLE DEPENDENCE OF EMISSIVITY ON SST RETRIEVAL FROM THERMAL INFRARED DATA - ATSR - COMMENT SO INTERNATIONAL JOURNAL OF REMOTE SENSING LA English DT Note ID SEA-SURFACE AB Singh, in a recent paper, attempts to describe the effect of sea surface emissivity variations on sea surface temperature (SST) retrieval from satellite borne infrared instruments (specifically the Along Track Scanning Radiometer (ATSR)). It is based, for the most part, on an incorrect premise, draws conclusions about SST retrieval accuracy which are not supported by the necessary evaluation of atmospheric and retrieval algorithm effects, and contains erroneous calculations. The shortcomings of the paper are discussed. C1 CSIRO,DIV ATMOSPHER RES,ASPENDALE,VIC 3195,AUSTRALIA. ASSOC UNIV INC,BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV LEICESTER,DEPT PHYS & ASTRON,LEICESTER LE1 7RH,LEICS,ENGLAND. RP WATTS, PD (reprint author), RUTHERFORD APPLETON LAB,DIV ATMOSPHER SCI,DIDCOT OX11 0QX,OXON,ENGLAND. NR 16 TC 0 Z9 0 U1 0 U2 1 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0143-1161 J9 INT J REMOTE SENS JI Int. J. Remote Sens. PD JUL 20 PY 1995 VL 16 IS 11 BP 2099 EP 2103 PG 5 WC Remote Sensing; Imaging Science & Photographic Technology SC Remote Sensing; Imaging Science & Photographic Technology GA RP225 UT WOS:A1995RP22500014 ER PT J AU GAO, W AF GAO, W TI PARAMETERIZATION OF SUBGRID-SCALE LAND-SURFACE FLUXES WITH EMPHASIS ON DISTRIBUTING MEAN ATMOSPHERIC FORCING AND USING SATELLITE-DERIVED VEGETATION INDEX SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID LEAF-AREA INDEX; CANOPY; ROUGHNESS; HETEROGENEITY; REFLECTANCE; RESISTANCE; RADIATION; MODELS; FOREST; FIELD AB Atmosphere-surface exchange fluxes can vary significantly over a large grid cell of atmospheric models and need to be estimated with subgrid-scale variations included. The present study aims at developing a method for parameterization of subgrid-scale (PASS) surface fluxes in atmospheric models, with emphasis on a scheme to distribute the mean atmospheric forcing from the model grid (MG) to subgrid (SG) cells and on using spectral vegetation indices derived from satellite remote sensing to estimate surface parameters at SG scales. The mean atmospheric forcing, including wind speed, temperature, and humidity, is distributed to SG cells according to spatial differences in these parameters at the surface and the strength of vertical turbulence mixing in the atmospheric boundary layer. Simulation with this scheme allows a feedback of changed SG atmospheric conditions caused by surface heterogeneity to influence the SG surface exchange. The SG surface exchange is parameterized with a suite of simplified relationships developed to infer surface conductance, aerodynamic resistance, surface albedo, and soil heat flux ratio on the basis of spectral vegetation indices available from satellite remote sensing, while empirical coefficients used in the relationships are derived for selected surface types from available field experiments. The computation of the surface flux and energy budget for a large number of SG cells is made feasible by using a rapid scheme based on an analytical solution to the surface energy budget equations. The PASS model was tested in a single-cell mode with field measurements and evaluated in a multicell mode with limited data and a sensitivity study. RP GAO, W (reprint author), ARGONNE NATL LAB, DIV ENVIRONM RES, BLDG 203, ROOM J159, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 33 TC 18 Z9 18 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 JUL 20 PY 1995 VL 100 IS D7 BP 14305 EP 14317 DI 10.1029/95JD01464 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA RK570 UT WOS:A1995RK57000041 ER PT J AU DRAKE, LR SIMONS, JW OLDENBORG, RC AF DRAKE, LR SIMONS, JW OLDENBORG, RC TI BOND-DISSOCIATION ENERGIES OF PBBR2(G) AND THE DYE LASER-INDUCED FLUORESCENCE EXCITATION SPECTRUM OF PBBR(A-X) SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID HOLLOW-CATHODE LAMP; NUMBER DENSITY CALIBRATION; STATE LEAD ATOMS; SPECTROSCOPIC CONSTANTS; ABSORPTION; CURVES; LINE AB An equilibrium thermodynamics determination of the individual bond dissociation energies in PbBr2(g) is presented, yielding 66.5 +/- 3.5 and 59.4 +/- 3.5 kcal/mol for the successive removal of Br atoms. These results are based on atomic absorption measurements of Pb(g) number densities and laser-induced fluorescence measurements of relative PbBr(g) number densities in equilibrium with PbBr2(g) at temperatures between 700 and 850 degrees C. The laser-induced fluorescence excitation spectrum of PbBr(A-X), excited between 467 and 485 nm and observed between 516 and 536 Mm, is reported. Lifetime measurements of PbBr(A) at various PbBr2 number densities yielded a collision-free lifetime of similar to 200 ns and a PbBr2 collisional quenching constant of 1.42 x 10(-9) cm(3) molecule(-1) s(-1). C1 NEW MEXICO STATE UNIV, DEPT CHEM & BIOCHEM, LAS CRUCES, NM 88003 USA. LOS ALAMOS NATL LAB, DIV CHEM SCI & TECHNOL, LOS ALAMOS, NM 87545 USA. NR 31 TC 2 Z9 2 U1 1 U2 3 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 JUL 20 PY 1995 VL 99 IS 29 BP 11350 EP 11356 DI 10.1021/j100029a009 PG 7 WC Chemistry, Physical SC Chemistry GA RK550 UT WOS:A1995RK55000009 ER PT J AU RUFAEL, TS HUNTLEY, DR MULLINS, DR GLAND, JL AF RUFAEL, TS HUNTLEY, DR MULLINS, DR GLAND, JL TI METHYL THIOLATE ON NI(111) - MULTIPLE ADSORPTION SITES AND MECHANISTIC IMPLICATIONS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PT(111) SURFACE; METHANETHIOL; DECOMPOSITION; NI(100); CH3SH; CHEMISTRY; ENERGIES; CU(111); W(001) AB High resolution XPS, HREELS, and TPD data indicate two distinct binding modes for methyl thiolate with clearly distinct reactivites on the Ni(111) surface. At low temperatures methyl thiolate is adsorbed primarily at low coordination, probably bridging, sites with the C-S bond tilted toward the surface and undergoes hydrogenolysis near 275 K. Between 150 and 250 K, a fraction of the bridge bonded thiolates are converted to thiolates in hollow sites with their C-S bonds oriented nearly perpendicular to the surface. The C-S bond in the hollow bonded thiolate is more stable and does not undergo hydrogenolysis until around 300 K. Overall, about 80% of the chemisorbed thiolates undergo hydrogenolysis (an overall disproportionation reaction) to form methane in the 250-350 K temperature range. The remaining 20% of the thiolates are completely dehydrogenated to form adsorbed atomic carbon and sulfur. Coadsorbed hydrogen favors formation of the thiolate in the bridge site. In the presence of coadsorbed deuterium, a substantial fraction of the methane formed is multiply deuterated (-d(2) and higher); however, no kinetic isotope effect is observed for the methane formation reaction. These results suggest C-S bond breaking as the rate determining step for methane formation. C1 UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 32 TC 58 Z9 58 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 20 PY 1995 VL 99 IS 29 BP 11472 EP 11480 DI 10.1021/j100029a027 PG 9 WC Chemistry, Physical SC Chemistry GA RK550 UT WOS:A1995RK55000027 ER PT J AU PENG, JC JANSEN, DM AF PENG, JC JANSEN, DM TI PROBING (U)OVER-BAR/(D)OVER-BAR ASYMMETRY IN THE PROTON VIA W-PRODUCTION AND Z-PRODUCTION SO PHYSICS LETTERS B LA English DT Article ID GOTTFRIED SUM-RULE; DRELL-YAN PROCESS; LIGHT-QUARK SEA; PARTON DISTRIBUTIONS; SYMMETRY-BREAKING; PBARP COLLISIONS; NUCLEON SEA; SCATTERING; VIOLATION; ORIGIN AB The sensitivity of W and Z production at RHIC to the possible (u) over bar/(d) over bar asymmetry in the proton is studied. The ratios of the W+ over W- production cross sections in p + p collision, as well as the ratios of the W+ and Z production cross sections for p + p over p + d collisions, are shown to be sensitive to this asymmetry. Predictions of various theoretical models for these ratios are presented. RP PENG, JC (reprint author), LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545, USA. NR 32 TC 15 Z9 15 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 JUL 20 PY 1995 VL 354 IS 3-4 BP 460 EP 464 DI 10.1016/0370-2693(95)00652-2 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RK514 UT WOS:A1995RK51400039 ER PT J AU FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALLAPICCOLA, C GINKEL, JF GREENE, SV JOHNS, WE NEHRING, MS BUTLER, JN CIHANGIR, S GAINES, I GARBINCIUS, PH GARREN, L GOURLAY, SA HARDING, DJ KASPER, P KREYMER, A LEBRUN, P SHUKLA, S VITTONE, M BIANCO, S FABBRI, FL SARWAR, S ZALLO, A CULBERTSON, R GARDNER, RW GREENE, R WISS, J ALIMONTI, G BELLINI, G BOSCHINI, M BRAMBILLA, D CACCIANIGA, B CINQUINI, L DICORATO, M GIAMMARCHI, M INZANI, P LEVERARO, F MALVEZZI, S MENASCE, D MERONI, E MORONI, L PEDRINI, D PERASSO, L PRELZ, F SALA, A SALA, S TORRETTA, D BUCHHOLZ, D CLAES, D GOBBI, B OREILLY, B BISHOP, JM CASON, NM KENNEDY, CJ KIM, GN LIN, TF PUSELJIC, DL RUCHTI, RC SHEPHARD, WD SWIATEK, JA WU, ZY ARENA, V BOCA, G CASTOLDI, C GIANINI, G RATTI, SP RICCARDI, C VIOLA, L VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS RAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F BLACKETT, GR DANYO, K PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY AF FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALLAPICCOLA, C GINKEL, JF GREENE, SV JOHNS, WE NEHRING, MS BUTLER, JN CIHANGIR, S GAINES, I GARBINCIUS, PH GARREN, L GOURLAY, SA HARDING, DJ KASPER, P KREYMER, A LEBRUN, P SHUKLA, S VITTONE, M BIANCO, S FABBRI, FL SARWAR, S ZALLO, A CULBERTSON, R GARDNER, RW GREENE, R WISS, J ALIMONTI, G BELLINI, G BOSCHINI, M BRAMBILLA, D CACCIANIGA, B CINQUINI, L DICORATO, M GIAMMARCHI, M INZANI, P LEVERARO, F MALVEZZI, S MENASCE, D MERONI, E MORONI, L PEDRINI, D PERASSO, L PRELZ, F SALA, A SALA, S TORRETTA, D BUCHHOLZ, D CLAES, D GOBBI, B OREILLY, B BISHOP, JM CASON, NM KENNEDY, CJ KIM, GN LIN, TF PUSELJIC, DL RUCHTI, RC SHEPHARD, WD SWIATEK, JA WU, ZY ARENA, V BOCA, G CASTOLDI, C GIANINI, G RATTI, SP RICCARDI, C VIOLA, L VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS RAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F BLACKETT, GR DANYO, K PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY TI STUDY OF CHARGED HADRONIC 4-BODY DECAYS OF THE D-0 MESON SO PHYSICS LETTERS B LA English DT Article ID CABIBBO-SUPPRESSED DECAYS; NONLEPTONIC DECAYS; D0 AB Charged hadronic four-body decays of D-0 mesons have been studied in the E687 photoproduction experiment at Fermilab. Branching ratios relative to the D-0 --> K- pi(+)pi(+)pi(-) decay mode for the Cabibbo-suppressed decays D-0 --> pi(-)pi(+)pi(-)pi(+), D-0 --> K(-)K(+)pi(-)pi(+) have been measured and the first evidence of the D-0 --> K(-)K(+)K(-)pi(+) decay mode is reported. An analysis of the D-0 --> K(-)K(+)pi(-)pi(+) resonance structure is also presented. C1 IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. UNIV COLORADO,BOULDER,CO 80309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV ILLINOIS,URBANA,IL 61801. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY. IST NAZL FIS NUCL,I-27100 PAVIA,ITALY. UNIV PUERTO RICO,MAYAGUEZ,PR 00708. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV S CAROLINA,COLUMBIA,SC 29208. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV N CAROLINA,ASHEVILLE,NC 28804. UNIV TENNESSEE,KNOXVILLE,TN 37996. KOREA UNIV,SEOUL 136701,SOUTH KOREA. RP FRABETTI, PL (reprint author), UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. NR 15 TC 17 Z9 17 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 JUL 20 PY 1995 VL 354 IS 3-4 BP 486 EP 493 DI 10.1016/0370-2693(95)00693-F PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RK514 UT WOS:A1995RK51400044 ER PT J AU SOMORJAI, GA AF SOMORJAI, GA TI MOLECULAR-LEVEL STUDIES OF SOLID-GAS AND SOLID-LIQUID INTERFACES SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT IUVSTA Workshop on Surface Science and Electrochemistry CY SEP 12-16, 1994 CL SAN BENEDETTO TRONTO, ITALY SP Int Union Vacuum Sci Tech & Appl, Italian Chem Soc, Electrochem Div, Int Soc Electrochem, Italian Vacuum Assoc ID SCANNING-TUNNELING-MICROSCOPY; SINGLE-CRYSTAL SURFACES; ENERGY-ELECTRON-DIFFRACTION; 2ND HARMONIC-GENERATION; CARBON-MONOXIDE; METAL-SURFACES; ATOMIC-STRUCTURE; UNDERPOTENTIAL DEPOSITION; VIBRATIONAL SPECTROSCOPY; 2ND-HARMONIC GENERATION AB Solid-liquid interfaces represent systems of great and diverse technological importance. Nevertheless, molecular scale surface science studies have so far been carried out primarily at solid-gas and solid-vacuum interfaces. In recent years, several optical and scanning probe techniques have become available that permitted molecular scale studies of solid-liquid interfaces. This paper reviews results from solid-gas interface studies as viewed from the perspective of relevance to solid-liquid interfaces, and correlates data obtained at the two interfaces wherever it is possible. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DEPT CHEM, BERKELEY, CA 94720 USA. NR 113 TC 28 Z9 29 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 EI 1879-2758 J9 SURF SCI JI Surf. Sci. PD JUL 20 PY 1995 VL 335 IS 1-3 BP 10 EP 22 DI 10.1016/0039-6028(95)00575-7 PG 13 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RL542 UT WOS:A1995RL54200003 ER PT J AU MARKOVIC, NM GASTEIGER, HA LUCAS, CA TIDSWELL, IM ROSS, PN AF MARKOVIC, NM GASTEIGER, HA LUCAS, CA TIDSWELL, IM ROSS, PN TI THE EFFECT OF CHLORIDE ON THE UNDERPOTENTIAL DEPOSITION OF COPPER ON PT(111) - AES, LEED, RRDE, AND X-RAY-SCATTERING STUDIES SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT IUVSTA Workshop on Surface Science and Electrochemistry CY SEP 12-16, 1994 CL SAN BENEDETTO TRONTO, ITALY SP Int Union Vacuum Sci Tech & Appl, Italian Chem Soc, Electrochem Div, Int Soc Electrochem, Italian Vacuum Assoc DE ADATOMS; ADSORPTION KINETICS; AUGER ELECTRON SPECTROSCOPY; BROMINE; CHEMISORPTION; CHLORINE; COPPER; ELECTROCHEMICAL METHODS; LOW ENERGY ELECTRON DIFFRACTION (LEED); LOW INDEX SINGLE CRYSTAL SURFACES; METAL-ELECTROLYTE INTERFACES; PLATINUM; SOLID-LIQUID INTERFACES; SURFACE STRUCTURE ROUGHNESS, SURFACE THERMODYNAMICS; X-RAY SCATTERING ID SCANNING-TUNNELING-MICROSCOPY; SINGLE-CRYSTAL SURFACES; ELECTROLYTE INTERFACE; ADSORPTION; PLATINUM(111); ACID; ELECTRODEPOSITION; SPECTROSCOPY; COADSORPTION; DIFFRACTION AB The details of the underpotential deposition (UPD) of Cu on Pt(111) in the presence of Cl- were re-examined using a combination of familiar ex-situ techniques (AES/LEED) and new in-situ techniques, anomalous surface X-ray scattering (SXS) and Cu2+ flux measurements using a rotating ring disk configuration with the Pt(111) single crystal as the disk electrode. In combination these techniques show definitively that Cu UPD occurs in a two step process, the first being the formation of a Cu-Cl adlattice having a bi-layer structure similar to the (111) plane of CuCl, the second being the formation of a pseudomorphic Cu monolayer covered with a Cl adlayer. The latter appears to have a structure similar to the structure of Cl adsorbed on Cu(111) to saturation in UHV. RP MARKOVIC, NM (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,MAIL STOP 2-100,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. OI Lucas, Christopher/0000-0001-5743-3868 NR 30 TC 58 Z9 58 U1 2 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JUL 20 PY 1995 VL 335 IS 1-3 BP 91 EP 100 DI 10.1016/0039-6028(95)00452-1 PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RL542 UT WOS:A1995RL54200011 ER PT J AU WANG, JX ADZIC, RR MAGNUSSEN, OM OCKO, BM AF WANG, JX ADZIC, RR MAGNUSSEN, OM OCKO, BM TI STRUCTURE OF ELECTRODEPOSITED TL OVERLAYERS ON AU(100) STUDIED VIA SURFACE X-RAY-SCATTERING SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT IUVSTA Workshop on Surface Science and Electrochemistry CY SEP 12-16, 1994 CL SAN BENEDETTO TRONTO, ITALY SP Int Union Vacuum Sci Tech & Appl, Italian Chem Soc, Electrochem Div, Int Soc Electrochem, Italian Vacuum Assoc DE ELECTROCHEMICAL METHODS; EPITAXY; SURFACE STRUCTURE; THALLIUM; X-RAY SCATTERING ID SCANNING-TUNNELING-MICROSCOPY; ATOMIC-FORCE MICROSCOPY; AU(111) ELECTRODES; INSITU; DIFFRACTION; MONOLAYERS; COMPRESSIBILITY; RECONSTRUCTION; REFLECTIVITY; SILVER(111) AB The electrodeposition of Tl on Au(100) has been investigated using surface X-ray scattering. At potentials prior to Tl bulk deposition, Tl adatoms form a c(p X 2) close-packed monolayer on the unreconstructed Au(100) surface in both acid and alkaline solutions. The Tl monolayer uniaxially compresses over a 0.25 V wide potential range and the nearest-neighbor-separation of Tl attains a minimum value of 3.34 Angstrom. This is close to the value obtained on Au(111) prior to bulk Tl deposition. From the specular X-ray reflectivity, a 2.55 Angstrom Au-Tl layer spacing is obtained for the c(p X 2) monolayer. Bulk deposition of Tl at potentials negative of the reversible Nernst potential results in the formation of imperfectly-aligned hexagonal-close-packed crystallites on top of the c(p X 2) monolayer. At potentials positive to the stripping of the c(p X 2) monolayer, a (2 X 2) diffraction pattern is observed in perchloric and sulfuric acid solutions but not in alkaline solutions. Real space models are proposed. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP WANG, JX (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV CHEM SCI,UPTON,NY 11973, USA. RI Wang, Jia/B-6346-2011 NR 32 TC 12 Z9 12 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 JUL 20 PY 1995 VL 335 IS 1-3 BP 120 EP 128 DI 10.1016/0039-6028(95)00459-9 PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RL542 UT WOS:A1995RL54200014 ER PT J AU PHILPOTT, MR GLOSLI, JN ZHU, SB AF PHILPOTT, MR GLOSLI, JN ZHU, SB TI MOLECULAR-DYNAMICS SIMULATION OF ADSORPTION IN ELECTRIC DOUBLE-LAYERS SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT IUVSTA Workshop on Surface Science and Electrochemistry CY SEP 12-16, 1994 CL SAN BENEDETTO TRONTO, ITALY SP Int Union Vacuum Sci Tech & Appl, Italian Chem Soc, Electrochem Div, Int Soc Electrochem, Italian Vacuum Assoc DE COMPUTER SIMULATIONS; EQUILIBRIUM THERMODYNAMICS AND STATISTICAL MECHANICS; METAL-ELECTROLYTE INTERFACES; MOLECULAR DYNAMICS; PHYSICAL ADSORPTION; SOLID-LIQUID INTERFACES ID LIQUID WATER; PARTICLE SIMULATIONS; CHARGED ELECTRODES; SURFACE; IONS; INTERFACE; ALGORITHM AB Classical molecular dynamics is used to model the structure and dynamics of electric double layers that form when a metal electrode is in contact with an aqueous electrolyte solution containing simple ions and neutral organics. First attention is focused on the distribution of ions and neutrals next to an uncharged electrode. The electric field and potential across the system are calculated. The iodide ion adsorbs from neutral solution and causes a negative shift in the potential of zero charge (PZC) relative to fluoride. Adsorbed benzene causes a small positive shift of the PZC. Benzene desorbs when the metal electrode is charged and the surface electric field causes a layer of localized and oriented water to form next to the electrode. Non contact adsorbed hydrated sodium ions are more effective than contact adsorbed chloride in desorbing benzene. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP PHILPOTT, MR (reprint author), IBM CORP,DIV RES,ALMADEN RES CTR,650 HARRY RD,SAN JOSE,CA 95120, USA. NR 39 TC 29 Z9 30 U1 1 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 JUL 20 PY 1995 VL 335 IS 1-3 BP 422 EP 431 DI 10.1016/0039-6028(95)00456-4 PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RL542 UT WOS:A1995RL54200048 ER PT J AU SUN, J WISHART, JF ISIED, SS AF SUN, J WISHART, JF ISIED, SS TI UPHILL ELECTRON-TRANSFER IN PENTAAMMINERUTHENIUM(III)-MODIFIED FERROCYTOCHROME-C - RATES, THERMODYNAMICS, AND THE MEDIATING ROLE OF THE RUTHENIUM MOIETY SO INORGANIC CHEMISTRY LA English DT Note ID MODIFIED CYTOCHROME-C; DEPENDENCE; OXIDATION; KINETICS AB The rate of thermodynamically-unfavorable (uphill) Fe-II-to-Ru-III electron transfer in pentaammineruthenium-modified horse-heart cytochrome c was obtained by using sufficiently high Co(oxalate)(3)(3-) concentrations to saturate the pre-equilibrium. The rate of uphill intramolecular electron transfer at 25 degrees C is 0.40 s(-1) (Delta H-double dagger = 12.5 +/- 0.2 kcal mol(-1), Delta S-double dagger = -18.3 +/- 0.7 cal deg(-1) mol(-1)). The net reaction thermodynamics are as follows: Delta G(o) = -0.125 eV, Delta H degrees = -9.0 +/- 0.2 kcal mol(-1), and Delta S degrees = -20.7 +/- 0.8 cal deg(-1) mol(-1). C1 RUTGERS STATE UNIV,DEPT CHEM,NEW BRUNSWICK,NJ 08854. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RI Wishart, James/L-6303-2013 OI Wishart, James/0000-0002-0488-7636 NR 18 TC 6 Z9 6 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD JUL 19 PY 1995 VL 34 IS 15 BP 3998 EP 4000 DI 10.1021/ic00119a023 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA RL033 UT WOS:A1995RL03300023 ER PT J AU PIETRASS, T GAEDE, HC BIFONE, A PINES, A RIPMEESTER, JA AF PIETRASS, T GAEDE, HC BIFONE, A PINES, A RIPMEESTER, JA TI MONITORING XENON CLATHRATE HYDRATE FORMATION ON ICE SURFACES WITH OPTICALLY ENHANCED XE-129 NMR SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; SPIN RELAXATION; GAS; TEMPERATURE; EXCHANGE; FIELD AB A new technique for monitoring the formation of xenon clathrate hydrates is presented. Under controlled-temperature conditions, clathrate formation is studied with optically enhanced Xe-129 NMR spectroscopy, which allows the observation of the xenon occupation of both small and large clathrate cages. The experiments were performed in a temperature range of 170 to 258 K. Only in the range of 195 to 233 K did clathrate formation occur, with applied pressures of typically 0.3 MPa. The NMR data are analyzed with a simple kinetic model, which provides a rate coefficient for clathrate formation and a time constant which describes the decay of the NMR signal intensity. The analysis of the rate coefficients and occupancy ratios of the large to the small cages under the different experimental conditions enabled us to obtain some novel information on the hydrate phase formed on ice surfaces. The results suggest that the surface phase formed initially has many more occupied small cages than the bulk phase at equilibrium and that the composition evolves toward that of the bulk phase in a few minutes. At higher temperatures (258 K) the surface phase seems to be less stable than the bulk phase. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NATL RES COUNCIL CANADA,STEACIE INST MOLEC SCI,OTTAWA,ON K1A 0R9,CANADA. RI Gaede, Holly/B-7392-2015 OI Gaede, Holly/0000-0003-4444-4394 NR 41 TC 64 Z9 65 U1 2 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUL 19 PY 1995 VL 117 IS 28 BP 7520 EP 7525 DI 10.1021/ja00133a025 PG 6 WC Chemistry, Multidisciplinary SC Chemistry GA RK426 UT WOS:A1995RK42600025 ER PT J AU FISK, Z SARRAO, JL SMITH, JL THOMPSON, JD AF FISK, Z SARRAO, JL SMITH, JL THOMPSON, JD TI THE PHYSICS AND CHEMISTRY OF HEAVY FERMIONS SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article; Proceedings Paper CT Colloquium on Physics - The Opening to Complexity CY JUN 26-27, 1994 CL NATL ACAD SCI, IRVINE, CA HO NATL ACAD SCI ID VALENCE PHASE-TRANSITION; SUPERCONDUCTING UPT3; MAGNETIC ORDER; URU2SI2; SYSTEM; FLUCTUATIONS; YBXIN1-XCU2; STATES; FIELDS; UBE13 AB The heavy fermions are a subset of the f-eleetron intermetallic compounds straddling the magnetic/nonmagnetic boundary. Their low-temperature properties are characterized by an electronic energy scale of order 1-10 K. Among the low-temperature ground states observed in heavy fermion compounds are exotic superconductors and magnets, as well as unusual semiconductors. We review here the current experimental and theoretical understanding of these systems. C1 FLORIDA STATE UNIV,DEPT PHYS,TALLAHASSEE,FL 32306. LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP FISK, Z (reprint author), FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,1800 E PAUL DR,TALLAHASSEE,FL 32306, USA. NR 34 TC 54 Z9 54 U1 0 U2 10 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 JUL 18 PY 1995 VL 92 IS 15 BP 6663 EP 6667 DI 10.1073/pnas.92.15.6663 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RJ892 UT WOS:A1995RJ89200003 PM 11607558 ER PT J AU BAK, P PACZUSKI, M AF BAK, P PACZUSKI, M TI COMPLEXITY, CONTINGENCY, AND CRITICALITY SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article; Proceedings Paper CT Colloquium on Physics - The Opening to Complexity CY JUN 26-27, 1994 CL NATL ACAD SCI, IRVINE, CA HO NATL ACAD SCI DE MACROEVOLUTION; MACROECONOMICS; PUNCTUATED EQUILIBRIUM ID SELF-ORGANIZED CRITICALITY; PUNCTUATED EQUILIBRIUM; FOSSIL RECORD; SIMPLE-MODEL; FIELD-THEORY; EXTINCTION; EVOLUTION; PATTERNS AB Complexity originates from the tendency of large dynamical systems to organize themselves into a critical state, with avalanches or ''punctuations'' of all sizes. In the critical state, events which would otherwise be uncoupled become correlated. The apparent, historical contingency in many sciences, including geology, biology, and economies, finds a natural interpretation as a self-organized critical phenomenon. These ideas are discussed in the context of simple mathematical models of sandpiles and biological evolution. Insights are gained not only from numerical simulations but also from rigorous mathematical analysis. RP BAK, P (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 39 TC 135 Z9 142 U1 1 U2 16 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 JUL 18 PY 1995 VL 92 IS 15 BP 6689 EP 6696 DI 10.1073/pnas.92.15.6689 PG 8 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RJ892 UT WOS:A1995RJ89200007 PM 11607561 ER PT J AU MALLADI, R SETHIAN, JA AF MALLADI, R SETHIAN, JA TI IMAGE-PROCESSING VIA LEVEL SET CURVATURE FLOW SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE IMAGE ENHANCEMENT; IMAGE SMOOTHING; GEOMETRIC HEAT EQUATION ID EDGE-DETECTION; ALGORITHMS; DIFFUSION; FRONTS AB We present a controlled image smoothing and enhancement method based on a curvature flow interpretation of the geometric heat equation. Compared to existing techniques, the model has several distinct advantages. (i) It contains just one enhancement parameter. (ii) The scheme naturally inherits a stopping criterion from the image; continued application of the scheme produces no further change. (iii) The method is one of the fastest possible schemes based on a curvature-controlled approach. C1 UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720. RP MALLADI, R (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 15 TC 96 Z9 98 U1 0 U2 6 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 JUL 18 PY 1995 VL 92 IS 15 BP 7046 EP 7050 DI 10.1073/pnas.92.15.7046 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RJ892 UT WOS:A1995RJ89200079 PM 7624367 ER PT J AU STRATTON, RF DUPONT, BR OLSEN, AS FERTITTA, A HOYER, M MOORE, CM AF STRATTON, RF DUPONT, BR OLSEN, AS FERTITTA, A HOYER, M MOORE, CM TI INTERSTITIAL DUPLICATION 19P SO AMERICAN JOURNAL OF MEDICAL GENETICS LA English DT Article DE DUPLICATION; SHORT ARM; CHROMOSOME 19; P13.13; P13.2; CONGENITAL HEART DEFECTS; VSD; ASD; MIDLINE FACIAL ANOMALIES AB We report on a 9-month-old girl with an interstitial duplication of 19p, developmental delay, and multiple anomalies including bifrontal prominence, obtuse frontonasal angle, short columella, additional midline philtral pillar, midline ridge on the tongue, vertical midline ridge at the mental symphysis, and a complex congenital heart defect including severe branch pulmonary artery stenosis, secundum atrial septal defect (ASD), and several ventricular septal defects (VSDs). Use of fluorescent in situ hybridization (FISH) with chromosome 19-specific probes showed a direct duplication of bands 19p13.13 and 19p13.2. (C) 1995 Wiley-Liss, Inc. C1 UNIV TEXAS,HLTH SCI CTR,DEPT CELLULAR & STRUCT BIOL,SAN ANTONIO,TX 78284. LAWRENCE LIVERMORE NATL LAB,DIV BIOTECHNOL & BIOMED RES,LIVERMORE,CA. WILFORD HALL USAF MED CTR,DEPT PEDIAT,LACKLAND AFB,TX 78236. RP STRATTON, RF (reprint author), UNIV TEXAS,HLTH SCI CTR,S TEXAS GENET CTR,7922 EWING HALSELL,SUITE 410,SAN ANTONIO,TX 78229, USA. NR 6 TC 10 Z9 10 U1 0 U2 0 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0148-7299 J9 AM J MED GENET JI Am. J. Med. Genet. PD JUL 17 PY 1995 VL 57 IS 4 BP 562 EP 564 DI 10.1002/ajmg.1320570409 PG 3 WC Genetics & Heredity SC Genetics & Heredity GA RG342 UT WOS:A1995RG34200008 PM 7573129 ER PT J AU SCHNEIDER, RP CRAWFORD, MH CHOQUETTE, KD LEAR, KL KILCOYNE, SP FIGIEL, JJ AF SCHNEIDER, RP CRAWFORD, MH CHOQUETTE, KD LEAR, KL KILCOYNE, SP FIGIEL, JJ TI IMPROVED ALGAINP-BASED RED (670-690 NM) SURFACE-EMITTING LASERS WITH NOVEL C-DOPED SHORT-CAVITY EPITAXIAL DESIGN SO APPLIED PHYSICS LETTERS LA English DT Article ID HETEROJUNCTIONS; DIODES AB A modified epitaxial design leads to straightforward implementation of short (1 lambda) optical cavities and the use of C as the sole p-type dopant in AlGaInP/AlGaAs red vertical-cavity surface-emitting lasers (VCSELs). Red VCSELs fabricated into simple etched air posts operate continuous wave at room temperature at wavelengths between 674 and 690 nm, with a peak output power as high as 2.4 mW at 690 nm, threshold voltage of 2.2 V, and peak wallplug efficiency of 9%. These values are all significant improvements over previous results achieved in the same geometry with an extended optical cavity epitaxial design. The improved performance is due primarily to reduced optical losses and improved current constriction and dopant stability. (C) 1995 American Institute of Physics. RP SCHNEIDER, RP (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 17 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 17 PY 1995 VL 67 IS 3 BP 329 EP 331 DI 10.1063/1.115434 PG 3 WC Physics, Applied SC Physics GA RK396 UT WOS:A1995RK39600011 ER PT J AU BECLA, P WITT, A LAGOWSKI, J WALUKIEWICZ, W AF BECLA, P WITT, A LAGOWSKI, J WALUKIEWICZ, W TI LARGE PHOTOINDUCED PERSISTENT OPTICAL-ABSORPTION IN SELENIUM DOPED ALSB SO APPLIED PHYSICS LETTERS LA English DT Article ID ARSENIC-ANTISITE DEFECT; DX CENTERS; HYDROSTATIC-PRESSURE; GAAS; SEMICONDUCTORS; SPECTROSCOPY AB Low-temperature, T<90 K, illumination transfers transparent, single crystals of AlSb doped with Se to a metastable state characterized by a high optical absorption approaching 200 cm(-1) The enhanced absorption spectrum extends from 0.1 to 1.5 eV and consists of a double band structure with peaks at 0.2 and 0.5 eV. It is induced by photons with a threshold energy of about 1 eV. It is persistent, i.e., it shows no measurable decay after switching off the excitation. The low absorption state is thermally recovered at 100 K. The persistent absorption is a manifestation of a DX-type bi-stability of the Se donor. The 0.2 and 0.5 bands are, respectively, due to the photoionization of electrons from the metastable hydrogenic donor level to X(1) and X(3) conduction band minima. A large binding energy of the Se donor is essential for the observation of persistent absorption and a lack of any free-electron related effects. (C) 1995 American Institute of Physics. C1 UNIV S FLORIDA,CTR MICROELECTR RES,TAMPA,FL 33620. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. RP BECLA, P (reprint author), MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139, USA. NR 16 TC 12 Z9 13 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 JUL 17 PY 1995 VL 67 IS 3 BP 395 EP 397 DI 10.1063/1.114640 PG 3 WC Physics, Applied SC Physics GA RK396 UT WOS:A1995RK39600033 ER PT J AU SANDFORD, D MARQUEZ, LN STACY, AM AF SANDFORD, D MARQUEZ, LN STACY, AM TI PRECIPITATION OF SUPERCONDUCTING, SINGLE-PHASE EUBA2CU4O8 FROM MOLTEN HYDROXIDE AT 475-DEGREES-C SO APPLIED PHYSICS LETTERS LA English DT Article ID ATMOSPHERE OXYGEN-PRESSURE; YBA2CU4O8; YBA2CU3O7-X AB A solution route involving reactive precipitation from molten hydroxide melts is presented for the synthesis of EUBa(2)CU(4)O(8) The melt consisted of a mixture of NaOH, KOH, and Ba(OH)(2), and was heated at 475 degrees C for similar to 2 h prior to reactant addition. Eu2O3 and CuO were then added, and in several hours crystallites of EuBa2Cu4O8 were obtained. The product was a single phase as determined by powder x-ray diffraction and the onset of superconductivity was observed at 78 K by de magnetic susceptibility. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP SANDFORD, D (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 16 TC 19 Z9 20 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 JUL 17 PY 1995 VL 67 IS 3 BP 422 EP 423 DI 10.1063/1.114619 PG 2 WC Physics, Applied SC Physics GA RK396 UT WOS:A1995RK39600042 ER PT J AU ZIRKEL, A RICHTER, D FETTERS, LJ SCHNEIDER, D GRACIANO, V HADJICHRISTIDIS, N AF ZIRKEL, A RICHTER, D FETTERS, LJ SCHNEIDER, D GRACIANO, V HADJICHRISTIDIS, N TI A SANS-BASED EVALUATION OF THE CHAIN DIMENSION TEMPERATURE-DEPENDENCE OF POLY(ETHYLETHYLENE) UNDER THETA-CONDITIONS SO MACROMOLECULES LA English DT Article ID UNPERTURBED DIMENSIONS; ATACTIC POLYPROPYLENE; NEUTRON-SCATTERING; FLEXIBLE POLYMERS; POLYSTYRENE; TRANSITION; PROPYLENE); SOLVENT; BENZENE; ANGLE AB The unperturbed chain dimensions of atactic near-monodisperse poly(ethylethylene) were evaluated in different Theta-solvents over the temperature range 10-80 degrees C. Radii of gyration, measured by small angle neutron scattering (SANS), were found to increase with increasing temperature and led to a value of 0.4 x 10(-3) deg(-1) for d ln [R(2)](0)/dT; behavior which replicates that seen in the melt state via SANS and thermoelastic measurements. Those findings are contrary to those from intrinsic viscosity measurements. C1 EXXON RES & ENGN CO, CORP RES LABS, ANNANDALE, NJ 08801 USA. FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. UNIV ATHENS, DEPT CHEM, GR-10680 ATHENS, GREECE. RI Richter, Dieter/H-3701-2013 OI Richter, Dieter/0000-0003-0719-8470 NR 40 TC 8 Z9 8 U1 0 U2 1 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 JUL 17 PY 1995 VL 28 IS 15 BP 5262 EP 5266 DI 10.1021/ma00119a014 PG 5 WC Polymer Science SC Polymer Science GA RK469 UT WOS:A1995RK46900014 ER PT J AU VOGT, R AF VOGT, R TI QCD MECHANISMS FOR DOUBLE QUARKONIUM AND OPEN HEAVY MESON HADROPRODUCTION SO NUCLEAR PHYSICS B LA English DT Article ID PSI-PSI-PRODUCTION; HADRONIC COLLISIONS; PARAMETRIZATIONS; ANNIHILATION; SYSTEMATICS; CHARM AB Double J/psi production on the order of 20-30 pb has been observed by the NA3 collaboration. These psi psi pairs, measured in pi(-N) interactions at 150 and 280 GeV/e and in pN interactions at 400 GeV/c, carry a large fraction of the projectile momentum, x(psi psi) greater than or equal to 0.6 for the 150 GeV/c beam and greater than or equal to 0.4 at 280 GeV/c. We examine several sources of psi psi pair production within QCD, including O(alpha(s)(4)) psi psi production, leading-twist b $$($) over bar b production and decay, and the materialization of heavy-quark Fock states in the projectile. We estimate the production cross section and the single and double J/psi momentum and mass distributions for each, comparing the results with the NA3 data, and predict psi psi production in pN interactions at 800 GeV/c, accessible to current fixed-target experiments. We also discuss the observable implications of open heavy meson pair production from the intrinsic heavy quark Fock states. C1 UNIV WASHINGTON, INST NUCL THEORY, SEATTLE, WA 98195 USA. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. NR 31 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD JUL 17 PY 1995 VL 446 IS 1-2 BP 159 EP 188 DI 10.1016/0550-3213(95)00179-V PG 30 WC Physics, Particles & Fields SC Physics GA RK955 UT WOS:A1995RK95500008 ER PT J AU DINE, M RANDALL, L THOMAS, S AF DINE, M RANDALL, L THOMAS, S TI SUPERSYMMETRY BREAKING IN THE EARLY UNIVERSE SO PHYSICAL REVIEW LETTERS LA English DT Article ID INFLATIONARY UNIVERSE; COSMOLOGICAL PROBLEMS; SUPERSTRING MODELS; ENTROPY GENERATION; BARYOGENESIS; FLUCTUATIONS; GRAVITINO; MECHANISM; DILATION; SCENARIO AB Supersymmetry breaking in the early Universe induces scalar soft potentials with curvature of the order of the Hubble constant. This has a dramatic effect on the coherent production of scalar fields along flat directions. For moduli fields, this breaking generically gives a concrete realization of the moduli problem by determining the field value at early times. However, it suggests a solution if the minimum of the induced potential coincides with the true minimum. For the Affleck-Dine mechanism, large squark and slepton expectation values generally do not result if the induced soft mass squared is positive, but they do occur if it is negative. An acceptable baryon asymmetry can be obtained without subsequent entropy releases and is related to the mass of the lightest neutrino. C1 MIT,NUCL SCI LAB,CAMBRIDGE,MA 02139. MIT,DEPT PHYS,CAMBRIDGE,MA 02139. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP DINE, M (reprint author), UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064, USA. NR 32 TC 351 Z9 351 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 JUL 17 PY 1995 VL 75 IS 3 BP 398 EP 401 DI 10.1103/PhysRevLett.75.398 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000011 ER PT J AU PARKER, SE CARATI, D AF PARKER, SE CARATI, D TI RENORMALIZED DISSIPATION IN PLASMAS WITH FINITE COLLISIONALITY SO PHYSICAL REVIEW LETTERS LA English DT Article ID FLUID; MODELS AB A nonlinear truncation procedure for Fourier-Hermite expansion of Boltzmann-type plasma equations is presented which eliminates fine velocity scale, taking into account its effect on coarser scales. The truncated system is then transformed back to (x, v) space which results in a renormalized Boltzmann equation. The resulting equation may allow for coarser velocity space resolution in kinetic simulations while reducing to the original Boltzmann equation when fine velocity scales are resolved. To illustrate the procedure, renormalized equations are derived for one dimensional electrostatic plasmas in which collisions are modeled by the Lenard-Bernstein operator. C1 FREE UNIV BRUSSELS,SERV PHYS STAT PLASMA & OPT NONLINEAIRE,B-1050 BRUSSELS,BELGIUM. RP PARKER, SE (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 18 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 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 17 PY 1995 VL 75 IS 3 BP 441 EP 444 DI 10.1103/PhysRevLett.75.441 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000022 ER PT J AU GLOVER, TE CRANE, JK PERRY, MD LEE, RW FALCONE, RW AF GLOVER, TE CRANE, JK PERRY, MD LEE, RW FALCONE, RW TI MEASUREMENT OF VELOCITY DISTRIBUTIONS AND RECOMBINATION KINETICS IN TUNNEL-IONIZED HELIUM PLASMAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ABOVE-THRESHOLD IONIZATION; FIELD-INDUCED IONIZATION; EXCITATION; ATOMS AB We report the first measurements on the distribution of electron energies and associated recombination kinetics in tunnel-ionized plasmas of interest to recent x-ray laser proposals. Subpicosecond laser pulses, focused to an intensity of 1 x 10(16) W/cm(2), create a fully ionized helium plasma. Measurement of the resulting emission spectrum allows a determination of the time-dependent electron velocity distribution. The initial distribution is found to be strongly non-Maxwellian and subsequent recombination kinetics proceed more slowly than predicted for a Maxwellian distribution of electrons. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RP GLOVER, TE (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 17 TC 30 Z9 30 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 17 PY 1995 VL 75 IS 3 BP 445 EP 448 DI 10.1103/PhysRevLett.75.445 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000023 ER PT J AU DIERKER, SB PINDAK, R FLEMING, RM ROBINSON, IK BERMAN, L AF DIERKER, SB PINDAK, R FLEMING, RM ROBINSON, IK BERMAN, L TI X-RAY PHOTON-CORRELATION SPECTROSCOPY STUDY OF BROWNIAN-MOTION OF GOLD COLLOIDS IN GLYCEROL SO PHYSICAL REVIEW LETTERS LA English DT Article AB We report x-ray photon correlation spectroscopy studies of the static structure factor and dynamic correlation function of a gold colloid dispersed in the viscous liquid glycerol. We find a diffusion coefficient for Brownian motion of the gold colloid which agrees well with that extrapolated from measurements made with visible light, but which was determined on an optically opaque sample and in a wave-vector range inaccessible to visible light. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,UPTON,NY 11973. RP DIERKER, SB (reprint author), UNIV MICHIGAN,DEPT PHYS,ANN ARBOR,MI 48109, USA. RI Fleming, Robert/B-1248-2008 NR 11 TC 160 Z9 160 U1 5 U2 23 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 JUL 17 PY 1995 VL 75 IS 3 BP 449 EP 452 DI 10.1103/PhysRevLett.75.449 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000024 ER PT J AU STERNLIEB, BJ HILL, JP INAMI, T SHIRANE, G LEE, WT WERNER, SA FAWCETT, E AF STERNLIEB, BJ HILL, JP INAMI, T SHIRANE, G LEE, WT WERNER, SA FAWCETT, E TI SILENT SATELLITES - CRITICAL FLUCTUATIONS IN CHROMIUM SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETIC EXCITATIONS AB Neutron scattering measurements of critical fluctuations associated with the spin-density-wave transition at the Neel temperature T-N = 311 K, in a single-Q chromium crystal are reported. Surprisingly, critical fluctuations are observed emanating from satellite positions, corresponding to absent magnetic domains, at which no elastic scattering occurs. The inelastic scattering from these ''silent satellites'' grows rapidly with increasing temperature, becoming equal to the allowed single-Q satellite scattering at T-N. C1 UNIV MISSOURI,DEPT PHYS,COLUMBIA,MO 65211. UNIV TORONTO,DEPT PHYS,TORONTO,ON M5S 1A7,CANADA. RP STERNLIEB, BJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Hill, John/F-6549-2011 NR 13 TC 10 Z9 10 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 JUL 17 PY 1995 VL 75 IS 3 BP 541 EP 544 DI 10.1103/PhysRevLett.75.541 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000047 ER PT J AU CHUMAKOV, AI BARON, AQR ARTHUR, J RUBY, SL BROWN, GS SMIRNOV, GV VANBURCK, U WORTMANN, G AF CHUMAKOV, AI BARON, AQR ARTHUR, J RUBY, SL BROWN, GS SMIRNOV, GV VANBURCK, U WORTMANN, G TI NUCLEAR-SCATTERING OF SYNCHROTRON-RADIATION BY TA-181 SO PHYSICAL REVIEW LETTERS LA English DT Article ID BRAGG-DIFFRACTION AB We report the first observation of excitation of the 6.2 keV nuclear level of Ta-181 by synchrotron radiation. The absolute energy of the level was determined to be 6214 +/- 2 eV. The time distribution of nuclear forward scattering of synchrotron radiation by a 7.5 mu m Ta metal foil was measured, and a decay time of 530 +/- 80 ns was observed. Analysis of the time distribution reveals an inhomogeneous broadening of the nuclear resonance in this sample 6 +/- 2 natural linewidths. C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. UNIV CALIF SANTA CRUZ,DEPT PHYS,SANTA CRUZ,CA 95064. KURCHATOV INST,RUSSIAN RES CTR,MOSCOW 123182,RUSSIA. TECH UNIV MUNICH,DEPT PHYS,D-85747 GARCHING,GERMANY. UNIV GESAMTHSCH PADERBORN,DEPT PHYS,D-33095 PADERBORN,GERMANY. RP CHUMAKOV, AI (reprint author), EUROPEAN SYNCHROTRON RADIAT FACIL,BP 220,F-38043 GRENOBLE,FRANCE. NR 28 TC 28 Z9 28 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 JUL 17 PY 1995 VL 75 IS 3 BP 549 EP 552 DI 10.1103/PhysRevLett.75.549 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000049 ER PT J AU RIORDAN, J DOERING, CR BENAVRAHAM, D AF RIORDAN, J DOERING, CR BENAVRAHAM, D TI FLUCTUATIONS AND STABILITY OF FISHER WAVES SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIFFUSION-LIMITED REACTION; CLOSURE SCHEMES; REACTION SYSTEM; KINETICS; SIMULATION; TRANSITION; DYNAMICS; GROWTH; FRONT AB We have performed direct Monte Carlo simulations of the reversible diffusion-limited process A + A <-> A to study the effect of fluctuations on a propagating interface between stable and unstable phases. The mean-field description of this process, Fisher's reaction-diffusion equation, admits stable nonlinear wave fronts. We find that this mean-field description breaks down in spatial dimensions 1 and 2, while it appears to be qualitatively and quantitatively accurate at and above 4 dimensions. In particular, the interface width grows similar to t(1/2) in 1D (exact) and similar to t(0.272+/-0.007) in 2D (numerical). C1 CLARKSON UNIV,DEPT PHYS,POTSDAM,NY 13699. RP RIORDAN, J (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,MS-B258,LOS ALAMOS,NM 87545, USA. NR 24 TC 65 Z9 65 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 JUL 17 PY 1995 VL 75 IS 3 BP 565 EP 568 DI 10.1103/PhysRevLett.75.565 PG 4 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000053 ER PT J AU DELEON, JM BATISTIC, I BISHOP, AR CONRADSON, SD TRUGMAN, SA AF DELEON, JM BATISTIC, I BISHOP, AR CONRADSON, SD TRUGMAN, SA TI POLARON ORIGIN FOR ANHARMONICITY OF THE AXIAL OXYGEN IN YBA2CU3O7 - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Note RP DELEON, JM (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 5 TC 2 Z9 2 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 JUL 17 PY 1995 VL 75 IS 3 BP 584 EP 584 PG 1 WC Physics, Multidisciplinary SC Physics GA RK330 UT WOS:A1995RK33000060 ER PT J AU HUTTEN, A BERNARDI, J NELSON, C THOMAS, G AF HUTTEN, A BERNARDI, J NELSON, C THOMAS, G TI LORENTZ MICROSCOPY OF GIANT MAGNETORESISTIVE AU-CO ALLOYS SO PHYSICA STATUS SOLIDI A-APPLIED RESEARCH LA English DT Article AB The magnetic domain structure of melt-spun giant magnetoresistant Au71.6Co28.4 samples in as-prepared and annealed states is determined by means of Lorentz microscopy using the JEOL-1000 atomic resolution microscope (ARM) in a modified diffraction mode. The interpretation of the domain structure is done by comparing magnetic contrasts observed in Fresnel mode with simulated contrasts using a geometrical algorithm based on the Lorentz equation. Cobalt precipitates 50 to 100 nm in diameter are found in a single domain state with a curling-like magnetization, that reduces their magnetic stray fields. Larger precipitates (approximate to 200 nm) are multidomain particles. C1 LAWRENCE BERKELEY LAB,NATL CTR ELECTRON MICROSCOPY,BERKELEY,CA 94720. VIENNA TECH UNIV,INST APPL & TECH PHYS,A-1040 VIENNA,AUSTRIA. RP HUTTEN, A (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. RI Hutten, Andreas/B-3524-2011 NR 13 TC 25 Z9 25 U1 0 U2 1 PU AKADEMIE VERLAG GMBH PI BERLIN PA MUHLENSTRASSE 33-34, D-13187 BERLIN, GERMANY SN 0031-8965 J9 PHYS STATUS SOLIDI A JI Phys. Status Solidi A-Appl. Res. PD JUL 16 PY 1995 VL 150 IS 1 BP 171 EP 184 DI 10.1002/pssa.2211500115 PG 14 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA RQ215 UT WOS:A1995RQ21500014 ER PT J AU JACKSON, K BOWMAN, LE FULTON, JL AF JACKSON, K BOWMAN, LE FULTON, JL TI WATER SOLUBILITY MEASUREMENTS IN SUPERCRITICAL FLUIDS AND HIGH-PRESSURE LIQUIDS USING NEAR-INFRARED SPECTROSCOPY SO ANALYTICAL CHEMISTRY LA English DT Article ID CARBON-DIOXIDE; 1,1,1,2-TETRAFLUOROETHANE R134A; THERMODYNAMIC PROPERTIES; MIXTURES; ETHANE; REFRIGERANTS AB A small amount of water added to a supercritical fluid can greatly increase the solubility of polar species in nonpolar fluids. These modified supercritical solutions significantly expand the use of the fluids in separations and reactions. In order to successfully utilize these systems, information on the miscibility or solubility of water in the fluid is required. Often solubility data are not available for water in a supercritical fluid under a given set of temperature and pressure conditions, and a costly set of equipment must be assembled in order to make these measurements. A relatively fast and inexpensive technique to measure water solubilities using a simple long path length optical cell in an FT-IR spectrometer is described. This technique is also applicable to common and newly developed refrigerants where water solubilities are often unknown at temperatures much above ambient. In this paper, water solubility data in carbon dioxide and two types of refrigerants (chlorodifluoromethane, R22; 1,1,1,2-tetrafluoroethane, R134a) are presented for temperatures from approximately 40 to 110 degrees C and pressures from approximately 10 to 344.8 bar. C1 PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPERAT GRP, RICHLAND, WA 99352 USA. NR 26 TC 63 Z9 63 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 15 PY 1995 VL 67 IS 14 BP 2368 EP 2372 DI 10.1021/ac00110a007 PG 5 WC Chemistry, Analytical SC Chemistry GA RJ072 UT WOS:A1995RJ07200007 ER PT J AU FERNANDEZ, A MAO, XL CHAN, WT SHANNON, MA RUSSO, RE AF FERNANDEZ, A MAO, XL CHAN, WT SHANNON, MA RUSSO, RE TI CORRELATION OF SPECTRAL EMISSION INTENSITY IN THE INDUCTIVELY-COUPLED PLASMA AND LASER-INDUCED PLASMA DURING LASER-ABLATION OF SOLID SAMPLES SO ANALYTICAL CHEMISTRY LA English DT Article ID INDUCED BREAKDOWN SPECTROSCOPY; MASS-SPECTROMETRY; ELEMENTAL ANALYSIS; IRON-ORE; METALS; BEAM AB Spectral atomic emission intensity from laser-induced plasmas (LIPs) exhibits excellent correlation with atomic emission intensity in the inductively coupled plasma (ICP) for a wide variety of materials and laser powers. Laser ablation sampling with introduction into an ICP for chemical analysis has, among other factors, a strong nonlinear dependence on laser energy, spot size, and material composition. The LIP emission also has a similar nonlinear dependence and is shown to correspond with the ICP behavior. The correlation is demonstrated for several homogeneous metallic and oxide materials during laser ablation sampling over a range of power densities and incident laser beam spot sizes. The correlation is best for higher melting temperature materials and moderate laser power density. The LIP and ICP emission intensities both show similar dependence for mass ablation rate versus power density and laser beam spot size. A normalized ICP/area over LIP emission ratio shows that a functional relationship can be found for changes in ICP intensity with changes in laser power density. The correlation shows that the ICP intensity accurately reflects changes in the laser ablation process and that the LIP may possibly be used for internal monitoring during laser sampling with the ICP. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 32 TC 40 Z9 40 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 15 PY 1995 VL 67 IS 14 BP 2444 EP 2450 DI 10.1021/ac00110a020 PG 7 WC Chemistry, Analytical SC Chemistry GA RJ072 UT WOS:A1995RJ07200020 ER PT J AU MCLUCKEY, SA GOERINGER, DE AF MCLUCKEY, SA GOERINGER, DE TI ION-MOLECULE REACTIONS FOR IMPROVED EFFECTIVE-MASS RESOLUTION IN ELECTROSPRAY MASS-SPECTROMETRY SO ANALYTICAL CHEMISTRY LA English DT Article ID INVERSE FOURIER-TRANSFORM; MULTIPLY CHARGED IONS; CYTOCHROME-C; IONIZATION; TRAP; BIOMOLECULES; PRINCIPLES; PROTEINS AB Tandem mass spectrometry is shown to improve the effective mass resolution in electrospray mass spectrometry. The technique involves selecting a population of ions within a narrow range of mass-to-charge values and allowing the ions to undergo proton transfer reactions. The shifts in mass-to-charge ratios associated with product ions formed by proton transfer allow for mass and charge assignment. The success of the technique relies on the relative enrichment of ions of a particular charge state that occurs in the mass-to-charge selection step. This approach can be used to extend the polymer mass range amenable to measurement, analyze mixtures that might otherwise be too complex for reliable mass measurements, and improve mass measurement precision when a mixture of cations is present within a given charge state. The technique is illustrated with a quadrupole ion trap using multiply-charged ions of cytochrome c, transfer ribonucleic acid from E. coli, strain W, and a synthetic deoxyribonucleic acid 30-mer. RP MCLUCKEY, SA (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. RI McLuckey, Scott/B-2203-2009 OI McLuckey, Scott/0000-0002-1648-5570 FU NIGMS NIH HHS [GM45372] NR 36 TC 40 Z9 40 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 15 PY 1995 VL 67 IS 14 BP 2493 EP 2497 DI 10.1021/ac00110a026 PG 5 WC Chemistry, Analytical SC Chemistry GA RJ072 UT WOS:A1995RJ07200026 PM 8686879 ER PT J AU WU, QY VANORDEN, S CHENG, XH BAKHTIAR, R SMITH, RD AF WU, QY VANORDEN, S CHENG, XH BAKHTIAR, R SMITH, RD TI CHARACTERIZATION OF CYTOCHROME-C VARIANTS WITH HIGH-RESOLUTION FTICR MASS-SPECTROMETRY - CORRELATION OF FRAGMENTATION AND STRUCTURE SO ANALYTICAL CHEMISTRY LA English DT Article ID COLLISION-INDUCED DISSOCIATION; CYCLOTRON RESONANCE SPECTROMETRY; MULTIPLY-CHARGED POLYPEPTIDES; ELECTROSPRAY-IONIZATION; GAS-PHASE; LARGE MOLECULES; ACTIVATED DISSOCIATION; FERRICYTOCHROME-C; IONS; PROTEINS AB The dissociation of cytochrome c ions (15+ charge state) generated by electrospray ionization has been studied by Fourier transform ion cyclotron resonance mass spectrometry (FTICR) using a sustained off-resonance irradiation/collision-iuduced dissociation (SORI-CID) technique. Over 95% of the fragment ions can be accurately assigned (to better than 10 ppm), yielding information on the primary sequences of the various proteins. Up to four stages of mass spectrometry (MS(4)) have been achieved without the need for quadrupole excitation/collisional cooling of the product ions. The subtle structural differences among the cytochrome c variants (from bovine, tuna, rabbit, and horse) are clearly reflected in their fragmentation patterns: replacing 3 out of 104 residues of the cytochrome c is shown to dramatically change the dissociation pattern. Of particular importance are a variety of results indicating that the dissociation of the cytochrome c's is influenced by higher-order structure and charge location, in addition to the primary structure (i.e., sequence). No fragmentation is observed in the region between residues 10-20 and little dissociation between residues 70-90. This is most likely due to the interactions of the heme group with the polypeptide chain, and such a heme ''footprinting'' pattern is analogous to the protein conformation in solution. These studies demonstrate that electrospray ionization-FTICR using SORI-CID can be a useful tool to probe not only the small differences in the primary sequences of proteins but also suggest the potential for probing their higher-order structures and yielding information not readily available from H/D exchange or circular dichoism studies. C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 73 TC 98 Z9 101 U1 2 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 15 PY 1995 VL 67 IS 14 BP 2498 EP 2509 DI 10.1021/ac00110a027 PG 12 WC Chemistry, Analytical SC Chemistry GA RJ072 UT WOS:A1995RJ07200027 PM 8686880 ER PT J AU VALHMU, WB PALMER, GD RIVERS, PA EBARA, S CHENG, JF FISCHER, S RATCLIFFE, A AF VALHMU, WB PALMER, GD RIVERS, PA EBARA, S CHENG, JF FISCHER, S RATCLIFFE, A TI STRUCTURE OF THE HUMAN AGGRECAN GENE - EXON-INTRON ORGANIZATION AND ASSOCIATION WITH THE PROTEIN DOMAINS SO BIOCHEMICAL JOURNAL LA English DT Article ID CARTILAGE PROTEOGLYCAN CORE; EPIDERMAL GROWTH-FACTOR; LEUKOCYTE-ADHESION MOLECULE-1; MACROPHAGE MANNOSE RECEPTOR; LINK PROTEIN; SULFATE PROTEOGLYCAN; MESSENGER-RNA; SEQUENCE; CLONING; REGION AB The complete exon-intron organization of the human aggrecan gene has been defined, and the exon organization has been compared with the individual domains of the protein core. A yeast artificial chromosome containing the aggrecan gene was selected from the Centre d'Etude du Polymorphisme Humaine yeast artificial chromosome library, A cosmid sublibrary was created from this, and direct sequencing of individual cosmids was used to provide the exon-intron organization. The human aggrecan gene was found to be composed of 19 exons ranging in size from 77 to 4224 bp. Exon 1 is non-coding, whereas exons 2-19 code for a protein core of 2454 amino acids with a calculated mass of 254379 Da. Intron 1 of the gene is at least 13 kb. Overall, the sizes of the 18 introns range from 0.5 to greater than 13 kb. Each intron begins with a GT and ends with an AG, thus obeying the GT/AG rule of splice-junction sequences. The entire coding region is contained in 39.4 kb of the gene. The organization of exons is strongly related to the specific domains of the protein core. The A loop of G1 and the interglobular domain are encoded by exons 3 and 7 respectively. The B and B' loops of G1 are encoded by exons 4-6, and those of G2 are encoded by exons 8-10. These sets of exons, coding for the B and B' loops, are identical in size and organization. This is supported by the intron classes associated with these exons. Exon 11 codes for the 5' half of the keratan sulphate-rich region, and exon 12 codes for the 3' half of the keratan sulphate-rich region as well as the entire chondroitin sulphate-rich region. G3 is encoded by exons 13-18, including the alternatively spliced epidermal growth factor-like and complement regulatory protein-like domains. The correspondence between the exon organization and the protein domains argues strongly for modular assembly of the aggrecan gene. C1 COLUMBIA UNIV, DEPT BIOCHEM & MOLEC BIOPHYS, NEW YORK, NY 10032 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. RP COLUMBIA UNIV, DEPT ORTHOPAED SURG, ORTHOPAED RES LAB, NEW YORK, NY 10032 USA. NR 73 TC 48 Z9 50 U1 0 U2 0 PU PORTLAND PRESS LTD PI LONDON PA CHARLES DARWIN HOUSE, 12 ROGER STREET, LONDON WC1N 2JU, ENGLAND SN 0264-6021 EI 1470-8728 J9 BIOCHEM J JI Biochem. J. PD JUL 15 PY 1995 VL 309 BP 535 EP 542 PN 2 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RK388 UT WOS:A1995RK38800025 PM 7626017 ER PT J AU ROBINSON, AL SEXTRO, RG AF ROBINSON, AL SEXTRO, RG TI DIRECT MEASUREMENTS OF SOIL-GAS ENTRY INTO AN EXPERIMENTAL BASEMENT DRIVEN BY ATMOSPHERIC-PRESSURE FLUCTUATIONS SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID RN-222 AB To study the importance of changes in atmospheric pressure on radon entry into houses, we have simultaneously measured the soil-gas entry into an experimental basement structure and the fluctuations in atmospheric pressure. Small amplitude (similar to 10 Pa), rapid (similar to 20 min) fluctuations in atmospheric pressure were an important driving force for soil-gas entry because 1) the characteristic time for the propagation of a pressure disturbance in the soil gas was similar to 2 min, and 2) the time-rate-of-change of these small fluctuations is often larger than that of the semi-diurnal oscillations. An analytical model has been derived for a structure with a subslab gravel layer based on a one-dimensional solution to the transient pressure diffusion equation. This model correctly predicts the temporal response of the measured soil-gas entry into the experimental structure , but underpredicts the amplitude. C1 UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720. RP ROBINSON, AL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. RI Robinson, Allen/I-5713-2012; Robinson, Allen/M-3046-2014 OI Robinson, Allen/0000-0003-1053-7090; Robinson, Allen/0000-0002-1819-083X NR 14 TC 8 Z9 8 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 15 PY 1995 VL 22 IS 14 BP 1929 EP 1932 DI 10.1029/95GL01599 PG 4 WC Geosciences, Multidisciplinary SC Geology GA RK290 UT WOS:A1995RK29000023 ER PT J AU PETERSON, JR AF PETERSON, JR TI SOME RECENT ADVANCES IN THE STUDY AND CHARACTERIZATION OF F-ELEMENT MATERIALS VIA OPTICAL SPECTROSCOPY SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 2nd International Conference on f-Elements (ICFE-2) CY AUG 01-06, 1994 CL HELSINKI, FINLAND SP Univ Helsinki, Helsinki Univ Technol, Minist Educ, Finland, City Helsinki, Elsevier Sci S A, European Rare Earth & Actinide Soc, Finnair, Nycomed Salutar Inc, Rhone Poulenc, Treibacher Chem Werke AG, Wallac Oy DE PHASE RELATIONSHIPS; ORBITAL ENERGY CROSSOVER; AMORPHIZATION ID CRYSTAL-STRUCTURE; SOLID-STATE; PRESSURE; LUMINESCENCE; ABSORPTION; TRANSITION; SPECTRA; GLASS; EU AB Continuing our recent tradition of using optical spectroscopic probes of crystal structure, we describe here some examples of our more recent uses of optical methods to characterize and study f-element materials. Included are the determination of the phase relationships of the 4f sesquioxides under pressure and the observations of pressure-induced d- to f-orbital energy crossover in Sm2+ ion in CsSmI3, amorphization of Eu(OH)(3) with pressure, and relatively strong blue up-conversion emission from an Er3+-doped glass ceramic upon green light excitation. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831. RP PETERSON, JR (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA. NR 21 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 15 PY 1995 VL 225 IS 1-2 BP 11 EP 14 DI 10.1016/0925-8388(94)07001-6 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RR585 UT WOS:A1995RR58500003 ER PT J AU LIU, GK CAO, RX BEITZ, JV AF LIU, GK CAO, RX BEITZ, JV TI OPTICALLY-DETECTED NUCLEAR-QUADRUPOLE RESONANCE OF EU3+ IN LAF3 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 2nd International Conference on f-Elements (ICFE-2) CY AUG 01-06, 1994 CL HELSINKI, FINLAND SP Univ Helsinki, Helsinki Univ Technol, Minist Educ, Finland, City Helsinki, Elsevier Sci S A, European Rare Earth & Actinide Soc, Finnair, Nycomed Salutar Inc, Rhone Poulenc, Treibacher Chem Werke AG, Wallac Oy DE OPTICAL-RF DOUBLE RESONANCE; NUCLEAR QUADRUPOLE MOMENT ID STATE AB We report optically-detected nuclear quadrupole resonance (ODNQR) of Eu3+ in LaF3. The anomalous nuclear quadrupole moments of Eu-151(3+) and Eu-153(3+) isotopes have been measured by detecting r.f.-induced quadrupole resonance which enhances the F-7(0)<->D-5(0) optical transition. Due to significant second-order hyperfine cancellation, the lowest quadrupole splitting in the ground state is only 6.95 MHz. In analysis of the ODNQR spectrum, an effective nuclear quadrupole Hamiltonian is diagonalized and the measured quadrupole splittings are used to determine the quadrupole interaction parameters for the ground state F-7(0). For Eu-151, P-151=2.67 and eta(151)=0.58, and for Eu-153, P-151=6.80 and eta(151)=0.49. C1 WUHAN UNIV,DEPT PHYS,WUHAN 430072,PEOPLES R CHINA. RP LIU, GK (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 11 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 15 PY 1995 VL 225 IS 1-2 BP 45 EP 47 DI 10.1016/0925-8388(94)07006-7 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RR585 UT WOS:A1995RR58500010 ER PT J AU HAIRE, RG AF HAIRE, RG TI DEPENDENCE OF THE VAPORIZATION BEHAVIOR OF ACTINIDE OXIDES ON THE ELECTRONIC NATURE OF THE ACTINIDE ATOMS SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 2nd International Conference on f-Elements (ICFE-2) CY AUG 01-06, 1994 CL HELSINKI, FINLAND SP Univ Helsinki, Helsinki Univ Technol, Minist Educ, Finland, City Helsinki, Elsevier Sci S A, European Rare Earth & Actinide Soc, Finnair, Nycomed Salutar Inc, Rhone Poulenc, Treibacher Chem Werke AG, Wallac Oy DE VAPORIZATION; OXIDES; ACTINIDES; MONOXIDES; ELECTRONIC STRUCTURE; ELECTRONIC NATURE AB The electronic configurations of the actinide elements protide insights into the properties and chemistries of these elements and their compounds. It is the stability of these electronic structures which determines oxidation states and oxide stoichiometries, but these states are also important in less obvious aspects, such as the vaporization of oxides. Recent systematic evaluations of the vaporization/decomposition behavior of actinide oxides as a function of atomic number have provided important clues for understanding the underlying role of the actinide's f electrons in the vaporization of their oxides. The major factor in determining the primary mode of vaporization of the actinide oxides is the magnitude of the element's monoxide dissociation energy, which is linked to the promotion energy for the actinide's f electrons. This relationship provides both correlative and predictive methodologies for these actinide oxides. Some recent information on actinide oxide properties, the vaporization behavior of selected actinide oxides, and the systematic correlation of vaporization behavior with the electronic nature of the actinide are summarized here. RP HAIRE, RG (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,TRANSURANIUM RES LAB,POB 2008,MS 6375,OAK RIDGE,TN 37831, USA. NR 17 TC 4 Z9 4 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 15 PY 1995 VL 225 IS 1-2 BP 142 EP 146 DI 10.1016/0925-8388(94)07130-6 PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RR585 UT WOS:A1995RR58500033 ER PT J AU STAUB, U SODERHOLM, L OSBORN, R GUILLAUME, M FURRER, A TROUNOV, V AF STAUB, U SODERHOLM, L OSBORN, R GUILLAUME, M FURRER, A TROUNOV, V TI INTERMULTIPLET TRANSITIONS IN OPTICALLY OPAQUE EUBA2CU3O7 - AN INELASTIC NEUTRON-SCATTERING STUDY SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 2nd International Conference on f-Elements (ICFE-2) CY AUG 01-06, 1994 CL HELSINKI, FINLAND SP Univ Helsinki, Helsinki Univ Technol, Minist Educ, Finland, City Helsinki, Elsevier Sci S A, European Rare Earth & Actinide Soc, Finnair, Nycomed Salutar Inc, Rhone Poulenc, Treibacher Chem Werke AG, Wallac Oy DE INELASTIC NEUTRON SCATTERING; HIGH T-C SUPERCONDUCTORS; CRYSTAL-FIELD; SPIN-ORBIT COUPLING ID CRYSTAL-FIELD EXCITATIONS; GDBA2CU3O7-DELTA; ERBA2CU3OX; PRBA2CU3O7; MOSSBAUER AB We report the results of inelastic neutron scattering (INS) studies of the J=0 to J=1 magnetic transitions in EuBa2Cu3O7. The low J values of these multiplets restrict our crystal field analysis to the second-order crystalline electric field (CEF) parameters obtained by fitting the splitting of the J=1 multiplet, and the spin-orbit coupling parameter, which is used to fit the energy of the J=0 to J=1 multiplet splitting. We compare our results with those derived from other INS studies on different rare earths, as well as with and derived from Mossbauer studies. The J=0 to J=1 splitting observed here is smaller than previously seen by optical spectroscopic studies on a variety of transparent, ionic compounds, necessitating the inclusion of a free-ion parameter in the fitting procedure. This work represents the first time that a complete excited multiplet has been seen for R in RBa(2)Cu(3)O(7). These results are particularly germane to crystal field analyses of the light rare earth ions in optically opaque materials, where assumptions about free-ion parameters are essential for a meaningful analysis. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ETH ZURICH,NEUTRON SCATTERING LAB,CH-5232 VILLIGEN,SWITZERLAND. PSI,CH-5232 VILLIGEN PSI,SWITZERLAND. ST PETERSBURG NUCL PHYS INST,ST PETERSBURG 188350,RUSSIA. RP STAUB, U (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. RI Osborn, Raymond/E-8676-2011; Staub, Urs/C-4914-2015 OI Osborn, Raymond/0000-0001-9565-3140; NR 19 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 15 PY 1995 VL 225 IS 1-2 BP 591 EP 594 DI 10.1016/0925-8388(94)07066-0 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RR585 UT WOS:A1995RR58500129 ER PT J AU SKANTHAKUMAR, S LOONG, CK SODERHOLM, L NIPKO, J RICHARDSON, JW ABRAHAM, MM BOATNER, LA AF SKANTHAKUMAR, S LOONG, CK SODERHOLM, L NIPKO, J RICHARDSON, JW ABRAHAM, MM BOATNER, LA TI ANOMALOUS TEMPERATURE-DEPENDENCE OF THE LATTICE-PARAMETERS IN HOPO4 AND HOVO4 - RARE-EARTH QUADRUPOLAR EFFECTS SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article; Proceedings Paper CT 2nd International Conference on f-Elements (ICFE-2) CY AUG 01-06, 1994 CL HELSINKI, FINLAND SP Univ Helsinki, Helsinki Univ Technol, Minist Educ, Finland, City Helsinki, Elsevier Sci S A, European Rare Earth & Actinide Soc, Finnair, Nycomed Salutar Inc, Rhone Poulenc, Treibacher Chem Werke AG, Wallac Oy DE TEMPERATURE DEPENDENCE; LATTICE PARAMETERS; RARE-EARTH QUADRUPOLAR EFFECTS ID ANISOTROPY SYSTEM DY(P1-XVX)O4; MAGNETIC-PROPERTIES; SUSCEPTIBILITY; VANADATE; ERPO4 AB The temperature dependencies of the lattice parameters in tetragonal HoPO4 and HoVO4 were measured using neutron powder diffraction techniques. Below about 100 K, the lattice parameter a of HoPO4 increases with decreasing temperature while c decreases. In HoVO4, the above behaviour is reversed, that is a decreases with decreasing temperature while c increases. Similar measurements on non-magnetic LuPO4 and LuVO4 do not show any anomaly. This observation indicates that the unusual temperature dependence of the lattice constants is magnetic in origin. The observed effect can be explained in terms of an Ho3+ quadrupole interaction with the crystalline lattice. In particular, the calculated electronically generated quadrupole moment of Ho3+ in HoPO4 and HoVO4 exhibits a temperature dependence similar to that observed for the lattice parameters. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP SKANTHAKUMAR, S (reprint author), ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE & CHEM,ARGONNE,IL 60439, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 20 TC 15 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 15 PY 1995 VL 225 IS 1-2 BP 595 EP 598 DI 10.1016/0925-8388(94)07067-9 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RR585 UT WOS:A1995RR58500130 ER PT J AU PHILLPOT, SR WOLF, D GLEITER, H AF PHILLPOT, SR WOLF, D GLEITER, H TI MOLECULAR-DYNAMICS STUDY OF THE SYNTHESIS AND CHARACTERIZATION OF A FULLY DENSE, 3-DIMENSIONAL NANOCRYSTALLINE MATERIAL SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RESOLUTION ELECTRON-MICROSCOPY; GRAIN-BOUNDARIES; COMPUTER-SIMULATION; FCC METALS; SUPERLATTICES; SPECTROSCOPY; PALLADIUM C1 KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH, D-76021 KARLSRUHE, GERMANY. RP ARGONNE NATL LAB, DIV MAT SCI, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 41 TC 108 Z9 113 U1 0 U2 14 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 JUL 15 PY 1995 VL 78 IS 2 BP 847 EP 861 DI 10.1063/1.360275 PG 15 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900027 ER PT J AU JENCIC, I BENCH, MW ROBERTSON, IM KIRK, MA AF JENCIC, I BENCH, MW ROBERTSON, IM KIRK, MA TI ELECTRON-BEAM-INDUCED CRYSTALLIZATION OF ISOLATED AMORPHOUS REGIONS IN SI, GE, GAP, AND GAAS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID INDUCED EPITAXIAL REGROWTH; SOLID-PHASE EPITAXY; ROOM-TEMPERATURE; SILICON; SEMICONDUCTORS; IRRADIATION; KINETICS; LAYERS C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP JENCIC, I (reprint author), UNIV ILLINOIS,DEPT MAT SCI & ENGN,1304 W GREEN ST,URBANA,IL 61801, USA. NR 36 TC 98 Z9 98 U1 7 U2 27 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 JUL 15 PY 1995 VL 78 IS 2 BP 974 EP 982 PG 9 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900045 ER PT J AU SHARP, JW JONES, EC WILLIAMS, RK MARTIN, PM SALES, BC AF SHARP, JW JONES, EC WILLIAMS, RK MARTIN, PM SALES, BC TI THERMOELECTRIC PROPERTIES OF COSB3 AND RELATED ALLOYS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID COAS3 C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NR 16 TC 201 Z9 214 U1 2 U2 46 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 JUL 15 PY 1995 VL 78 IS 2 BP 1013 EP 1018 DI 10.1063/1.360402 PG 6 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900051 ER PT J AU KAMARAS, K BARTH, KL KEILMANN, F HENN, R REEDYK, M THOMSEN, C CARDONA, M KIRCHER, J RICHARDS, PL STEHLE, JL AF KAMARAS, K BARTH, KL KEILMANN, F HENN, R REEDYK, M THOMSEN, C CARDONA, M KIRCHER, J RICHARDS, PL STEHLE, JL TI THE LOW-TEMPERATURE INFRARED OPTICAL FUNCTIONS OF SRTIO3 DETERMINED BY REFLECTANCE SPECTROSCOPY AND SPECTROSCOPIC ELLIPSOMETRY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID THIN-FILMS C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. SOPRA,F-92270 BOIS COLOMBES,FRANCE. RP KAMARAS, K (reprint author), MAX PLANCK INST FESTKORPERFORSCH,HEISENBERGSTR 1,D-70569 STUTTGART,GERMANY. RI Kamaras, Katalin/A-3916-2009; Thomsen, Christian/E-2295-2012; Thomsen, Christian/B-5014-2015 OI Kamaras, Katalin/0000-0002-0390-3331; Thomsen, Christian/0000-0001-6057-1401 NR 25 TC 46 Z9 46 U1 0 U2 10 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 JUL 15 PY 1995 VL 78 IS 2 BP 1235 EP 1240 PG 6 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900082 ER PT J AU GIBSON, JK AF GIBSON, JK TI LASER-ABLATION SYNTHESIS OF LANTHANIDE OXIDE CLUSTERS - MECHANISMS AND CHEMISTRY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID VAPORIZATION; HALIDES RP GIBSON, JK (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. NR 22 TC 26 Z9 26 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 JUL 15 PY 1995 VL 78 IS 2 BP 1274 EP 1280 DI 10.1063/1.360369 PG 7 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900088 ER PT J AU FITZSIMMONS, MR EASTMAN, JA ROBINSON, RA LYNN, JW AF FITZSIMMONS, MR EASTMAN, JA ROBINSON, RA LYNN, JW TI THE NEEL TEMPERATURE OF NANOCRYSTALLINE CHROMIUM SO JOURNAL OF APPLIED PHYSICS LA English DT Note C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. NATL INST STAND & TECHNOL,INST REACTOR RADIAT,GAITHERSBURG,MD 20899. RP FITZSIMMONS, MR (reprint author), LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545, USA. RI Eastman, Jeffrey/E-4380-2011; Lujan Center, LANL/G-4896-2012; OI Eastman, Jeff/0000-0002-0847-4265 NR 10 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JUL 15 PY 1995 VL 78 IS 2 BP 1364 EP 1366 DI 10.1063/1.360765 PG 3 WC Physics, Applied SC Physics GA RH819 UT WOS:A1995RH81900101 ER PT J AU WILEMSKI, G AF WILEMSKI, G TI THE KELVIN EQUATION AND SELF-CONSISTENT NUCLEATION THEORY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TIME-DEPENDENT NUCLEATION; HOMOGENEOUS NUCLEATION; KINETICS AB Issues of self-consistency are reviewed for several unary equilibrium size distributions based on the capillarity approximation. Some apparent difficulties of interpretation are resolved. In terms of the kinetic approach to nucleation theory, the influence of self-consistency on the nucleation rate is shown to arise entirely from differences in the dimer evaporation rates for nearly all versions of classical theory. The nucleation rate behavior of the Kelvin model is explored. In this model, the Kelvin equation is used to prescribe all cluster evaporation rates. Nucleation rates predicted by the Kelvin model are quantitatively similar to those of the self-consistent classical (SCC) theory, but not to other simple versions of the classical theory. This behavior arises entirely from the relatively close coincidence of the SCC and Kelvin dimer evaporation rates. This means that, for the distribution-based versions of classical theory, the SCC model is the closest analogue of the Kelvin model. Because the Kelvin equation is fundamentally inadequate for very small clusters, the close relationship between the Kelvin and SCC formulations indicates that both are equally lacking in fundamental justification. The Kelvin model may, however, have some pragmatic utility, and a simple analytical rate expression is also derived for it to simplify the calculation of nucleation rates for this model. (C) 1995 American Institute of Physics. C1 PHYS SCI INC,ANDOVER,MA 01810. RP WILEMSKI, G (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 44 TC 70 Z9 70 U1 0 U2 12 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 JUL 15 PY 1995 VL 103 IS 3 BP 1119 EP 1126 DI 10.1063/1.469822 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RJ371 UT WOS:A1995RJ37100029 ER PT J AU WILEMSKI, G WYSLOUZIL, BE AF WILEMSKI, G WYSLOUZIL, BE TI BINARY NUCLEATION KINETICS .1. SELF-CONSISTENT SIZE DISTRIBUTION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID HOMOGENEOUS NUCLEATION; MULTICOMPONENT NUCLEATION; SYSTEMS; ETHANOL; NUCLEI; WATER AB Using the principle of detailed balance, we derive a new self-consistency requirement, termed the kinetic product rule, relating the evaporation coefficients and equilibrium cluster distribution for a binary system. We use this result to demonstrate and resolve an inconsistency for an idealized Kelvin model of nucleation in a simple binary mixture. We next examine several common forms for the equilibrium distribution of binary clusters based on the capillarity approximation and ideal vapor behavior. We point out fundamental deficiencies for each expression. We also show that each distribution yields evaporation coefficients that formally satisfy the new kinetic product rule but are physically unsatisfactory because they depend on the monomer vapor concentrations. We then propose a new form of the binary distribution function that is free of the deficiencies of the previous functions except for its reliance on the capillarity approximation. This new self-consistent classical (SCC) size distribution for binary clusters has the following properties: It satisfies the law of mass action; it reduces to an SCC unary distribution for clusters of a single component; and it produces physically acceptable evaporation rate coefficients that also satisfy the new kinetic product rule. Since it is possible to construct other examples of similarly well-behaved distributions, our result is not unique in this respect, but it does give reasonable predictions. As an illustrative example, we calculate binary nucleation rates and vapor activities for the ethanol-hexanol system at 260 K using the new SCC distribution and compare them to experimental results. The theoretical rates are uniformly higher than the experimental values over the entire vapor composition range. Although the predicted activities are lower, we find good agreement between the measured and theoretical slope of the critical vapor activity curve at a constant nucleation rate of 10(7) cm(-3) s(-2). (C) 1995 American Institute of Physics. C1 WORCESTER POLYTECH INST,DEPT CHEM ENGN,WORCESTER,MA 01609. PHYS SCI INC,ANDOVER,MA 01810. RP WILEMSKI, G (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. RI Wyslouzil, Barbara/G-8219-2012 NR 34 TC 75 Z9 75 U1 0 U2 5 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 JUL 15 PY 1995 VL 103 IS 3 BP 1127 EP 1136 DI 10.1063/1.469823 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RJ371 UT WOS:A1995RJ37100030 ER PT J AU WYSLOUZIL, BE WILEMSKI, G AF WYSLOUZIL, BE WILEMSKI, G TI BINARY NUCLEATION KINETICS .2. NUMERICAL-SOLUTION OF THE BIRTH-DEATH EQUATIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID VAPOR-PHASE NUCLEATION; HOMOGENEOUS NUCLEATION; MULTICOMPONENT NUCLEATION; SUPERSATURATED VAPOR; CONDENSATION; CONSISTENCY; MIXTURES; GLASSES; SYSTEMS; SURFACE AB We numerically solve the complete set of coupled differential equations describing transient binary nucleation kinetics for vapor-to-liquid phase transitions. We investigate binary systems displaying both positive and negative deviations from ideality in the liquid phase and obtain numerical solutions over a wide range of relative rates of monomer impingement. We emphasize systems and conditions that either have been or can be investigated experimentally. In almost every case, we find behavior consistent with Stauffer's idea that the major particle flux passes through the saddle point with an orientation angle that depends on the rates of monomer impingement. When this is true, the exact numerical steady state nucleation rates are within 10%-20% of the predictions of Stauffer's analytical theory. The predictions of Reiss' saddle point theory also agree with the numerical results over a wide range of relative monomer impingement rates as long as the equilibrium vapor pressures of the two pure components are similar, but Stauffer's theory is more generally valid. For systems with strong positive deviations from ideality, we find that the saddle point approximation can occasionally fail for vapor compositions that put the system on the verge of partial liquid phase miscibility. When this situation occurs for comparable monomer impingement rates, we show that the saddle point approximation can be rescued by evaluating an appropriately modified nucleation rate expression. When the two impingement rates differ significantly, however, the major particle flux may bypass the saddle point and cross a low ridge on the free energy surface. Even in these rare cases, the analytical saddle point result underpredicts the numerical result by less than a factor of 10. Finally, we study the transition from binary to unary nucleation by progressively lowering the vapor concentration of one component. Both Reiss' and Stauffer's rate expressions fail under these conditions, but our modified rate prescription remains within 10%-20% of the exact numerical rate. (C) 1995 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. PHYS SCI INC,ANDOVER,MA 01810. RP WYSLOUZIL, BE (reprint author), WORCESTER POLYTECH INST,DEPT CHEM ENGN,WORCESTER,MA 01609, USA. RI Wyslouzil, Barbara/G-8219-2012 NR 49 TC 64 Z9 64 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 15 PY 1995 VL 103 IS 3 BP 1137 EP 1151 DI 10.1063/1.469824 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RJ371 UT WOS:A1995RJ37100031 ER PT J AU STEVENSON, CS MCCOY, JD PLIMPTON, SJ CURRO, JG AF STEVENSON, CS MCCOY, JD PLIMPTON, SJ CURRO, JG TI MOLECULAR-DYNAMICS SIMULATIONS OF ATHERMAL POLYMER BLENDS - FINITE SYSTEM SIZE CONSIDERATIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LOCAL-STRUCTURE; MELTS; ENTROPY; LIQUIDS; FLUIDS; MODEL AB Molecular dynamics simulations of binary, athermal blends of chains consisting of 50 tangent sites were carried out over a range of compositions at liquidlike packing fractions. The sites interact with repulsive Lennard-Jones potentials and have effective hard sphere diameters of approximately 1.0 and 1.2 for the two site types. The intrachain and interchain correlation functions were found and, except for the single component systems, the interchain correlations were seen to de strongly dependent on system size. Trivial, long range correlations due to the finite system size can be approximated from simple physical arguments, and the coarse, interchain, radial distribution functions can be ''corrected'' for these effects. The resulting correlation functions are seen to behave at large separation as would be expected of interchain radial distribution functions in an infinite sized system, permitting meaningful comparisons with the predictions of liquid state theory. (C) 1995 American Institute of Physics. C1 NEW MEXICO INST MIN & TECHNOL,DEPT MAT & MET ENGN,SOCORRO,NM 87801. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI McCoy, John/B-3846-2010 OI McCoy, John/0000-0001-5404-1404 NR 35 TC 17 Z9 17 U1 0 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 JUL 15 PY 1995 VL 103 IS 3 BP 1200 EP 1207 DI 10.1063/1.469829 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RJ371 UT WOS:A1995RJ37100037 ER PT J AU STEVENSON, CS CURRO, JG MCCOY, JD PLIMPTON, SJ AF STEVENSON, CS CURRO, JG MCCOY, JD PLIMPTON, SJ TI MOLECULAR-DYNAMICS SIMULATIONS OF ATHERMAL POLYMER BLENDS - COMPARISON WITH INTEGRAL-EQUATION THEORY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SITE MODEL-THEORY; MICROSCOPIC EQUATIONS; CHAIN MOLECULES; MELTS; FLUIDS; LIQUIDS; THERMODYNAMICS; POLYETHYLENE; PARAMETER; MIXTURES AB Molecular dynamics simulations of a binary, athermal blend of chains consisting of 50 sites were carried out over a range of-compositions at an overall packing fraction of 0.465, The species in the blend interact with Lennard-Jones repulsive interactions chosen to give effective hard core diameters of 1.015 and 1.215 for the A and B sites, respectively. The intramolecular structure of the chains was seen to be weakly dependent on composition, with the mean-square end-to-end distance of the minority component at low volume fractions tending towards that of the host component. The three intermolecular radial distribution functions g(AA)(T), g(BB)(T), and g(AB)(r) were observed to increase with increasing concentrations of the A chains. Polymer reference interaction site model (PRISM) calculations were performed on this same blend and very good agreement was found between the theory and the simulation over a range of compositions, Significant nonrandom mixing was observed from the molecular dynamics simulations on local length scales; PRISM theory was able to accurately predict these nonrandom local features in the packing. (C) 1995 American Institute of Physics. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NEW MEXICO INST MIN & TECHNOL,SOCORRO,NM 87801. RI McCoy, John/B-3846-2010 OI McCoy, John/0000-0001-5404-1404 NR 50 TC 24 Z9 24 U1 0 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 JUL 15 PY 1995 VL 103 IS 3 BP 1208 EP 1215 DI 10.1063/1.469830 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RJ371 UT WOS:A1995RJ37100038 ER PT J AU JONES, RH HENAGER, CH WINDISCH, CF AF JONES, RH HENAGER, CH WINDISCH, CF TI HIGH-TEMPERATURE CORROSION AND CRACK-GROWTH OF SIC-SIC AT VARIABLE OXYGEN PARTIAL PRESSURES SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT 3rd US/Japan Seminar on Development and Environmental Characteristics of New Materials CY JUN 07-09, 1994 CL MT HOOD, OR SP Japan Soc Promot Sci, Natl Sci Fdn, USN, Off Naval Res DE SILICON CARBIDE; CRACK GROWTH; CARBON INTERFACE; OXIDATION ID AL2O3 BEND SPECIMENS; ELEVATED-TEMPERATURES; CERAMIC COMPOSITES; STRESS-CORROSION; MATRIX CRACKING; SILICON-CARBIDE; BRIDGED CRACKS; FRACTURE; FIBERS; RESISTANCE AB Thermal gravimetric analysis (TGA) and subcritical crack growth measurements of chemical-vapor-infiltrated SIC matrix reinforced with Nicalon fibres and with a 1 mu m thick C fiber-matrix interface have been conducted at 1100 degrees C over O-2-Ar mixtures ranging from 0.25% to 20.0% O-2. The TGA and interface recession measurements both gave linear reaction kinetics for O-2 concentrations of 2.0% or less and a reaction order of unity. Subcritical crack growth measurements demonstrated that the crack velocity, in the stress-intensity-independent stage II regime, increases with increasing O-2/Ar ratio. Also, the transition from stage II to the stress-intensity-dependent stage III regime is shifted to lower stress intensities with increasing O-2/Ar ratio. A time-dependent crack growth model that incorporates creep of the bridging SIC fibers and the removal of the C interfacial layer by oxidation successfully explains the subcritical crack growth characteristics. RP JONES, RH (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. OI Henager, Chuck/0000-0002-8600-6803 NR 33 TC 20 Z9 20 U1 0 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 JUL 15 PY 1995 VL 198 IS 1-2 BP 103 EP 112 DI 10.1016/0921-5093(95)80064-2 PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA RQ439 UT WOS:A1995RQ43900014 ER PT J AU PANDEY, SU VILKELIS, G HUMANIC, TJ KRANER, H BELLWIED, R FRENCH, A HALL, J AF PANDEY, SU VILKELIS, G HUMANIC, TJ KRANER, H BELLWIED, R FRENCH, A HALL, J TI STUDIES OF IONIZING-RADIATION EFFECTS ON SILICON DRIFT DETECTORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID CHAMBERS AB A 45 x 45 mm rectangular silicon drift detector (SDD) was irradiated using a Co-60 gamma-source and its performance was studied. The total integrated dosage was 9 krad which is equivalent to the ionizing radiation dosage that the STAR SVT inner barrel detectors are expected to receive during 10 years of running at the soon to be built RHIC collider. The detector's performance after a high temperature annealing was also studied. The detector was found to be sufficiently radiation hard for RHIC applications. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. WAYNE STATE UNIV,DETROIT,MI 48201. RP PANDEY, SU (reprint author), OHIO STATE UNIV,COLUMBUS,OH 43210, USA. NR 5 TC 6 Z9 6 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JUL 15 PY 1995 VL 361 IS 3 BP 457 EP 460 DI 10.1016/0168-9002(95)00196-4 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RJ300 UT WOS:A1995RJ30000006 ER PT J AU FUKUDA, T HASEGAWA, T HASHIMOTO, O HIGASHI, A HOMMA, S KITAMI, T MATSUYAMA, Y MIYACHI, T MORIMOTO, T NAGAE, T OMATA, K SEKIMOTO, M SHIBATA, T SAKAGUCHI, H TAKAHASHI, T AOKI, K DOI, Y KONDO, Y MAKIDA, Y NOMACHI, M NOUMI, H SASAKI, O SHINTOMI, T BHANG, H PARK, H YOUN, M YU, H GAVRILOV, Y AJIMURA, S KISHIMOTO, T OHKUSU, A SHINKAI, N MAEDA, K SAWAFTA, R AF FUKUDA, T HASEGAWA, T HASHIMOTO, O HIGASHI, A HOMMA, S KITAMI, T MATSUYAMA, Y MIYACHI, T MORIMOTO, T NAGAE, T OMATA, K SEKIMOTO, M SHIBATA, T SAKAGUCHI, H TAKAHASHI, T AOKI, K DOI, Y KONDO, Y MAKIDA, Y NOMACHI, M NOUMI, H SASAKI, O SHINTOMI, T BHANG, H PARK, H YOUN, M YU, H GAVRILOV, Y AJIMURA, S KISHIMOTO, T OHKUSU, A SHINKAI, N MAEDA, K SAWAFTA, R TI THE SUPERCONDUCTING KAON SPECTROMETER - SKS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID MAGNETIC-FIELD AB A superconducting kaon spectrometer has been installed in the north experimental hall of the KEK 12-GeV proton synchrotron. The spectrometer was designed to serve for nuclear physics experiments with meson beams in the 1 GeV/c region, particular emphasis being laid on study of Lambda-hypernuclei via (pi(+),K+) reactions. In order to obtain h-hypernuclear data with better statistics and energy resolution, it was designed to have a good momentum resolution of 0.1% FWHM and a large acceptance of 100 msr. It consists of a large superconducting dipole magnet, tracking chambers, and trigger counters that can efficiently select kaons from large background of pions and protons. The overall energy resolution for scattering is realized together with a beam-line spectrometer in the K6 beam line, the momentum resolution of which was also designed to be better than 0.1% FWHM. A good energy resolution of better than 2 MeV FWHM has been confirmed in pi(-)-C-12 elastic scattering and in the (pi(+),K+) reaction on C-12. C1 UNIV TOKYO,INST NUCL STUDY,TANASHI,TOKYO 188,JAPAN. KYOTO UNIV,DEPT PHYS,SAKYO KU,KYOTO 60601,JAPAN. NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 305,JAPAN. SEOUL NATL UNIV,DEPT PHYS,SEOUL 151742,SOUTH KOREA. RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW 117312,RUSSIA. OSAKA UNIV,DEPT PHYS,TOYONAKA,OSAKA 660,JAPAN. TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 98077,JAPAN. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. NR 13 TC 93 Z9 93 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JUL 15 PY 1995 VL 361 IS 3 BP 485 EP 496 DI 10.1016/0168-9002(95)00216-2 PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RJ300 UT WOS:A1995RJ30000011 ER PT J AU HELMER, RG AF HELMER, RG TI METHODOLOGY FOR THE MEASUREMENT OF BETA(-)-DECAY INTENSITY DISTRIBUTIONS FROM THE ANALYSIS OF TOTAL ABSORPTION GAMMA-RAY SPECTRA (VOL 351, PG 406, 1993) SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Correction, Addition RP HELMER, RG (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 1 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JUL 15 PY 1995 VL 361 IS 3 BP 628 EP 628 DI 10.1016/0168-9002(95)00389-4 PG 1 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RJ300 UT WOS:A1995RJ30000029 ER PT J AU HELMER, RG AF HELMER, RG TI GAMMA-RAY ENERGIES FOR CALIBRATION FROM THE DECAY OF (161)TB, HF-172+LU-172, AND AM-241 (VOL 330, PG 434, 1993) SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Correction, Addition RP HELMER, RG (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 1 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD JUL 15 PY 1995 VL 361 IS 3 BP 629 EP 629 DI 10.1016/0168-9002(95)00380-0 PG 1 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RJ300 UT WOS:A1995RJ30000030 ER PT J AU PASHMAKOV, B ZHANG, K JAEGER, HM TIWARI, P WU, XD AF PASHMAKOV, B ZHANG, K JAEGER, HM TIWARI, P WU, XD TI ROOM-TEMPERATURE OXYGEN DIFFUSION IN A-AXIS NORMAL YBA2CU3OX THIN-FILMS SO PHYSICA C LA English DT Article ID TRACER DIFFUSION; SPECTROSCOPY; DEPOSITION; VACUUM AB Near-surface oxygen chemical diffusion at room temperature in YBa2Cu2Ox thin films with a-axis orientation normal to the substrate has been studied using four-probe DC conductivity measurements. The results show that under the same experimental conditions the oxygen out-diffusion coefficient is about two orders of magnitude higher in these films compared to those with the c-axis normal to the substrate. We also present data on oxygen out-diffusion enhancement in these films under ultraviolet (UV) light illumination. C1 UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637. LOS ALAMOS NATL LAB,CTR SUPERCOND TECHNOL,LOS ALAMOS,NM 87545. NR 15 TC 4 Z9 4 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JUL 15 PY 1995 VL 249 IS 3-4 BP 289 EP 292 DI 10.1016/0921-4534(95)00311-8 PG 4 WC Physics, Applied SC Physics GA RK953 UT WOS:A1995RK95300009 ER PT J AU FISHMAN, IM KINO, GS WU, XD STUDENMUND, WR ABRIKOSOV, AA VARLAMOV, AA BUZDIN, AI AF FISHMAN, IM KINO, GS WU, XD STUDENMUND, WR ABRIKOSOV, AA VARLAMOV, AA BUZDIN, AI TI MODULATION MEASUREMENTS OF YBA2CU3O7-X OPTICAL REFLECTIVITY USING A THERMAL-WAVE TECHNIQUE SO PHYSICA C LA English DT Article ID QUASI-PARTICLE SCATTERING; SUPERCONDUCTORS; CRYSTALS; HEAT AB We have measured the differential optical reflectivity (lambda = 0.78 mm) of YBa2Cu3O7-x single crystals in the temperature range of 20-300 K using a thermal wave technique. A sharp signal maximum with a temperature width similar to 10 K was observed below T-c, and was attributed to the electronic contribution of the optical reflectivity. It is concluded that the two components of the differential reflectivity signal are related to accumulation of, the superconducting phase and temperature variation of the electron-scattering time. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP FISHMAN, IM (reprint author), STANFORD UNIV,GINZTON LAB,STANFORD,CA 94305, USA. RI Buzdin, Alexander/I-6038-2013 NR 20 TC 1 Z9 1 U1 1 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 JUL 15 PY 1995 VL 249 IS 3-4 BP 304 EP 308 DI 10.1016/0921-4534(95)00298-7 PG 5 WC Physics, Applied SC Physics GA RK953 UT WOS:A1995RK95300011 ER PT J AU TETENBAUM, M HASH, M TANI, BS LUO, JS MARONI, VA AF TETENBAUM, M HASH, M TANI, BS LUO, JS MARONI, VA TI OXYGEN STOICHIOMETRY, PHASE-STABILITY, AND THERMODYNAMIC BEHAVIOR OF THE LEAD-DOPED BI-2223 AND AG/BI-2223 SYSTEMS SO PHYSICA C LA English DT Article ID BI2SR2CA2CU3O10+DELTA; NONSTOICHIOMETRY; BISMUTH; LIMITS; OXIDE AB Electromotive-force (EMF) measurements of oxygen fugacities as a function of stoichiometry have been made in the lead-doped Bi-2223 superconducting system in the temperature range 700-815 degrees C by means of an oxygen titration technique that employs an yttria-stabilized zirconia electrolyte. The results of our studies indicate that processing or annealing lead-doped Bi-2223 at temperatures ranging from 750 to 815 degrees C and at oxygen partial pressures ranging from similar to 0.02 to 0.2 atm should preserve Bi-2223 as essentially single-phase material. Thermodynamic assessments of the partial molar quantities Delta ($) over bar S(O-2) and Delta ($) over bar H(O-2) indicate that the plateau regions in the plot of oxygen partial pressure versus oxygen stoichiometry (x) can be represented by the diphasic CuO-Cu2O system. In accord with the EMF measurements, it was found that lead-doped Bi-2223 in a silver sheath is stable at 815 degrees C for oxygen partial pressures between 0.02 and 0.13 atm. RP TETENBAUM, M (reprint author), ARGONNE NATL LAB,DIV CHEM TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 20 Z9 20 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 JUL 15 PY 1995 VL 249 IS 3-4 BP 396 EP 402 DI 10.1016/0921-4534(95)00299-5 PG 7 WC Physics, Applied SC Physics GA RK953 UT WOS:A1995RK95300020 ER PT J AU STEWART, HB THOMPSON, JMT UEDA, Y LANSBURY, AN AF STEWART, HB THOMPSON, JMT UEDA, Y LANSBURY, AN TI OPTIMAL ESCAPE FROM POTENTIAL WELLS - PATTERNS OF REGULAR AND CHAOTIC BIFURCATION SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article ID PERIODIC-ORBITS; DYNAMICAL-SYSTEMS; TRANSIENT CHAOS; ATTRACTORS; METAMORPHOSES; OSCILLATOR; RESONANCE; CRISES; JUMPS AB The patterns of bifurcation governing the escape of periodically forced oscillations from a potential well over a smooth potential barrier are studied by numerical simulation. Both the generic asymmetric single-well cubic potential and the symmetric twin-well potential Duffing oscillator are surveyed by varying three parameters: forcing frequency, forcing amplitude, and damping coefficient. The close relationship between optimal escape and nonlinear resonance within the well is confirmed over a wide range of damping, Subtle but significant differences are observed at: higher damping ratios. The possibility of indeterminate outcomes of jumps to and from resonance near optimal escape is completely suppressed above a critical level of the damping ratio (about 0.12 for the asymmetric single-well oscillator). Coincidentally, at almost the same level of damping, the optimal escape condition becomes distinct from the apex in the to, Fl plane of the bistable regime; this corresponds to the appearance of chaotic attractors which subsume both resonant and non-resonant motions within one well. At higher damping levels, further changes occur involving conversions from chaotic-saddle to regular-saddle bifurcations, These changes in optimal escape phenomena correspond to codimension three bifurcations at exceptional points in the space of three parameters. These bifurcations are described in terms of homoclinic and heteroclinic structures of invariant manifolds, and changes in accessible boundary orbits, The same sequence of codimension three bifurcations is observed in both the twin-well Duffing oscillator and the asymmetric single-well escape equation. Within the codimension three bifurcation patterns governing escape, one particular codimension two global bifurcation involves a chaotic attractor explosion, or interior crisis, compounded with a blue sky catastrophe or boundary crisis of the exploded attractor, This codimension two bifurcation has structure containing a form of predictive power: knowledge of attractor bifurcations in part of the codimension two pattern permits inference of the attractor and basin bifurcations in the remainder. This predictive power is applicable beyond the context of escape from potential wells, Quantitative correlation of bifurcation patterns between the two equations according to simple scaling laws is tested. The unstable periodic orbits which figure most prominently in the major attractor-basin bifurcations are of periods one and three. Their linking is conveniently interpreted by a three-layer spiral horseshoe structure for the folding action in phase space within a well, The structure of this 3-shoe implies a partial ordering among order three subharmonic saddle-node bifurcations, This helps explain the sequence of codimension three bifurcations near optimal escape. Some bifurcational precedence relations are known to follow from the Inking of periodic orbits in a braid on a 3-shoe. Additional bifurcational precedence relations follow from a quantitative property of generic potential wells: the dynamic hilltop saddle has a very large expanding multiplier over one cycle of forcing near fundamental resonance. This quantitative property explains the close coincidence of codimension three bifurcations near the suppression of indeterminate outcomes. An experimentalist's approach to identifying the three-layer template structure from time series data is discussed, including a consistency check involving Poincare indices. The bifurcation patterns emerging at higher damping values create favorable conditions for realizing experimental strategies to recognize optimal escape and locate it in parameter space. Strategies based solely on observations of quasi-steady behavior while remaining always within one well are discussed. C1 UNIV LONDON UNIV COLL, CTR NONLINEAR DYNAM, LONDON WC1E 6BT, ENGLAND. KYOTO UNIV, DEPT ELECT ENGN, KYOTO 606, JAPAN. BRUNEL UNIV, DEPT PHYS, UXBRIDGE UB8 3PH, MIDDX, ENGLAND. RP BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. RI Thompson, John/C-1391-2008 NR 52 TC 33 Z9 34 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 EI 1872-8022 J9 PHYSICA D JI Physica D PD JUL 15 PY 1995 VL 85 IS 1-2 BP 259 EP 295 DI 10.1016/0167-2789(95)00172-Z PG 37 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA RJ442 UT WOS:A1995RJ44200013 ER PT J AU NORMAN, MR AF NORMAN, MR TI CALCULATION OF EFFECTIVE COULOMB INTERACTION FOR PR3+, U4+, AND UPT3 SO PHYSICAL REVIEW B LA English DT Note AB In this paper, the Slater integrals for a screened Coulomb interaction of the the Yukawa form are calculated and by fitting the Thomas-Fermi wave vector, good agreement is obtained with experiment for the multiplet spectra of Pr3+ and U4+ ions. Moreover, a predicted multiplet spectrum for the heavy fermion superconductor UPt3 is shown with a calculated Coulomb U of 1.6 eV. These effective Coulomb interactions, which are quite simple to calculate, should be useful inputs to further many-body calculations in correlated electron metals. RP NORMAN, MR (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Norman, Michael/C-3644-2013 NR 17 TC 24 Z9 24 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 JUL 15 PY 1995 VL 52 IS 3 BP 1421 EP 1424 DI 10.1103/PhysRevB.52.1421 PG 4 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500002 ER PT J AU LEE, KH CHANG, KJ COHEN, ML AF LEE, KH CHANG, KJ COHEN, ML TI FIRST-PRINCIPLES CALCULATIONS OF THE COULOMB PSEUDOPOTENTIAL MU-ASTERISK - APPLICATION TO AL SO PHYSICAL REVIEW B LA English DT Note ID DENSITY-FUNCTIONAL APPROACH; STATIC DIELECTRIC MATRICES; PLASMON DISPERSION; METALS AB We present first-principles pseudopotential calculations for the Coulomb pseudopotential mu* using a dielectric matrix approach. An application to Al is made and mu* is estimated to be 0.091. A comparison of the crystal potential, local field, and exchange-correlation effects on the dielectric screening demonstrates that the exchange-correlation effect contributes the largest reduction in mu* compared to that obtained for a free electron gas. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV CHEM & MAT SCI, BERKELEY, CA 94720 USA. RP KOREA ADV INST SCI & TECHNOL, DEPT PHYS, 373-1 KUSUNG DONG, YUSUNG KU, TAEJON 305701, SOUTH KOREA. RI Chang, Kee Joo/C-1989-2011 NR 20 TC 25 Z9 25 U1 0 U2 0 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 JUL 15 PY 1995 VL 52 IS 3 BP 1425 EP 1428 DI 10.1103/PhysRevB.52.1425 PG 4 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500003 ER PT J AU TANG, D ELSAYEDALI, HE WENDELKEN, J XU, J AF TANG, D ELSAYEDALI, HE WENDELKEN, J XU, J TI SCANNING-TUNNELING-MICROSCOPY STUDY OF PB ON SI(111) SO PHYSICAL REVIEW B LA English DT Note ID EPITAXIAL PB; SURFACES; GROWTH AB Scanning-tunneling microscopy has been used to study temperature and coverage dependence of the structure of lead on the Si(111)-7X7 surface. For low Pb coverage, the Pb atoms favored the faulted sites. The ratio between the number of Pb atoms on faulted to unfaulted sites increased after sample annealing. An energy difference of 0.05 eV associated with a Pb atom on these two sites is estimated. The mobility of Pb atoms on Si(111) was observed at a temperature as low as 260 degrees C for a coverage of 0.1 and 1 ML. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP TANG, D (reprint author), OLD DOMINION UNIV,DEPT ELECT & COMP ENGN,PHYS ELECTR RES INST,NORFOLK,VA 23529, USA. NR 17 TC 27 Z9 28 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 JUL 15 PY 1995 VL 52 IS 3 BP 1481 EP 1484 DI 10.1103/PhysRevB.52.1481 PG 4 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500018 ER PT J AU SEAGER, CH ANDERSON, RA AF SEAGER, CH ANDERSON, RA TI MINORITY-CARRIER-INDUCED RELEASE OF HYDROGEN FROM DONORS IN SILICON SO PHYSICAL REVIEW B LA English DT Article ID CRYSTALLINE SILICON; CHARGE-STATE; COMPLEXES; PASSIVATION; SI AB The time dependence of Schottky-barrier depletion layer charge density is monitored after injection of holes in P- and As-doped Si containing donor/hydrogen pairs. The resultant hole capture event leads to the reactivation of hydrogenated donors. In contrast to the observations of Johnson et al., we see an essentially abrupt change in this capacitance, and little, if any, transient behavior that can be attributed to the sweepout of H+ or the conversion of H- to neutral or positively charged hydrogen. Since we observe that much of the hole-induced charge density disappears after a few days wait under dark conditions, it appears that this reaction is at least partially reversible. We conclude that this experiment provides no direct cofirmation of the existence of positively or negatively charged hydrogen. RP SEAGER, CH (reprint author), SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. NR 24 TC 5 Z9 5 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD JUL 15 PY 1995 VL 52 IS 3 BP 1708 EP 1717 DI 10.1103/PhysRevB.52.1708 PG 10 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500054 ER PT J AU ABURANO, RD HONG, H ROESLER, JM CHUNG, K LIN, DS ZSCHACK, P CHEN, H CHIANG, TC AF ABURANO, RD HONG, H ROESLER, JM CHUNG, K LIN, DS ZSCHACK, P CHEN, H CHIANG, TC TI BOUNDARY-STRUCTURE DETERMINATION OF AG/SI(111) INTERFACES BY X-RAY-DIFFRACTION SO PHYSICAL REVIEW B LA English DT Article ID 111 SURFACE SUPERSTRUCTURES; SI(111) 7X7 SURFACE; SCHOTTKY-BARRIER; ROOM-TEMPERATURE; NOBLE-METALS; SILICON; EPITAXY; GROWTH; GERMANIUM AB Different Ag/Si(111) systems have been examined using synchrotron x-ray diffraction. Multi-atomic-layer deposition of Ag onto a Si(111)-(7X7) surface maintained at room temperature results in an unstrained, (111)-oriented film. The interface shows a Ag-modified (7X7) structure which when annealed above 200-250 degrees C transforms to a(1X1) structure. Although this is near the characteristic temperature for formation of the (root (3) over bar X root (3) over bar)R30 degrees surface reconstruction commonly observed for a monolayer of Ag adsorbed on Si(111), no evidence of this (root (3) over bar X root (3) over bar)R30 degrees reconstruction was found at the interface, A Ag monolayer (root (3) over bar X root (3) over bar)R30 degrees surface, further covered by multilayer Ag deposition at room temperature, also shows no indication of the (root (3) over bar X root (3) over bar)R30 degrees reconstruction at the interface. This indicates that the actual interface structure may or may not be related to the clean or adsorbed layer structures. The structure of the Ag-Si interface was further characterized by scans of the crystal truncation rods. Both the (7X7) interface prepared by room-temperature deposition and the annealed (1X1) interface show fairly sharp boundaries. The results suggest some intermixing occurs at the monolayer level for the annealed interface. The structure of the Ag film was also investigated. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. NATL CHIAO TUNG UNIV,DEPT PHYS,HSINCHU,TAIWAN. OAK RIDGE INST SCI & EDUC,DIV MET & CERAM,OAK RIDGE,TN 37831. RP ABURANO, RD (reprint author), UNIV ILLINOIS,MAT RES LAB,104 S GOODWIN AVE,URBANA,IL 61801, USA. RI Lin, Dengsung/A-4127-2009; Chiang, Tai/H-5528-2011 NR 34 TC 29 Z9 29 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 JUL 15 PY 1995 VL 52 IS 3 BP 1839 EP 1847 DI 10.1103/PhysRevB.52.1839 PG 9 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500069 ER PT J AU BOETTGER, JC BIRKENHEUER, U KRUGER, S ROSCH, N TRICKEY, SB AF BOETTGER, JC BIRKENHEUER, U KRUGER, S ROSCH, N TRICKEY, SB TI THEORETICAL INVESTIGATION OF NA ADSORPTION ON THE AL(111) SURFACE SO PHYSICAL REVIEW B LA English DT Article ID ALKALI; POTENTIALS; SYSTEMS; LAYERS; METALS; CO AB All-electron, full-potential thin-film calculations with the linear-combination-of-Gaussian-type orbitals-fitting function technique are used to determine the energy required to form an ordered (root (3) over bar X root (3) over bar)R 30 degrees overlayer of Na on the Al(111) surface. Two distinctly different types of adsorption are considered; substitutional adsorption after initial formation of an ordered array of surface vacancies and normal (nonsubstitutional) adsorption at sites with hcp symmetry. The present results for the surface vacancy formation energy, adsorption energies, and adatom-substrate bond lengths are all in good agreement with the results of previous norm-conserving ab initio pseudopotential calculations. C1 TECH UNIV MUNICH,LEHRSTUHL THEORET CHEM,D-85747 GARCHING,GERMANY. UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611. RP BOETTGER, JC (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. RI Roesch, Notker/C-1182-2010 NR 27 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JUL 15 PY 1995 VL 52 IS 3 BP 2025 EP 2031 DI 10.1103/PhysRevB.52.2025 PG 7 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500091 ER PT J AU SIMPSON, WC YARMOFF, JA AF SIMPSON, WC YARMOFF, JA TI ION-SURFACE INTERACTIONS IN THE ELECTRON-STIMULATED DESORPTION OF CL+ FROM CL-2/SI(111)-7X7 SO PHYSICAL REVIEW B LA English DT Article ID ANGULAR-DISTRIBUTIONS; FLUORINE; SI(100); SILICON; CHLORINE; DYNAMICS; ESDIAD; XEF2 AB Cl+ electron-stimulated desorption energy and angular distributions are collected from Si(111)-7 X 7 surfaces exposed to Cl-2. The results of these measurements are fitted to a model that accounts for variations in the surface work function, ion-surface image-charge interactions, and ion neutralization. From the fits, the strength of the image-charge interaction and the angular dependence of the neutralization are determined. The ideas presented here concerning the motion of ions in the vicinity of a surface are generally valid for ah ion-surface interactions. C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 30 TC 11 Z9 11 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JUL 15 PY 1995 VL 52 IS 3 BP 2038 EP 2046 DI 10.1103/PhysRevB.52.2038 PG 9 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500093 ER PT J AU WEARE, CB GERMAN, KAH YARMOFF, JA AF WEARE, CB GERMAN, KAH YARMOFF, JA TI EVIDENCE FOR AN INHOMOGENEOUS HOMOGENEOUS TRANSITION IN THE SURFACE LOCAL ELECTROSTATIC POTENTIAL OF K-COVERED AL(100) SO PHYSICAL REVIEW B LA English DT Article ID ALKALI-METAL ADSORPTION; CHARGE-TRANSFER; ION-SCATTERING; NEUTRALIZATION AB Resonant neutralization probabilities for 2 keV Li-7(+) singly scattered from Al and K surface atomic sites are measured from K-covered Al(100). At low K coverages (<0.03 ML), nearly all of the Li+ ions scattered from K are neutralized, while neutral fractions ranging from 32 to 65% are measured for scattering from Al. This indicates that the surface local electrostatic potential is laterally inhomogeneous. At higher K coverages, on the other hand, the neutral fractions for scattering from Al and K become nearly equal, showing that the inhomogeneities are greatly reduced. This represents direct experimental evidence of such a transition. C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 14 TC 14 Z9 14 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 JUL 15 PY 1995 VL 52 IS 3 BP 2066 EP 2069 DI 10.1103/PhysRevB.52.2066 PG 4 WC Physics, Condensed Matter SC Physics GA RL525 UT WOS:A1995RL52500097 ER PT J AU DASILVA, AJR FALICOV, LM AF DASILVA, AJR FALICOV, LM TI MANY-BODY CALCULATION OF THE MAGNETIC, OPTICAL, AND CHARGE-TRANSFER SPECTRA OF SOLID OXYGEN IN THE ALPHA-PHASE AND BETA-PHASE SO PHYSICAL REVIEW B LA English DT Article ID DYNAMICS; ANTIFERROMAGNET AB The electronic spectra of alpha and beta solid O-2 were calculated in a full many-body approach for a cluster consisting of four O-2 molecules with periodic-boundary conditions. By including only the partially occupied pi orbitals (16 spin orbitals, 8 electrons) the basis set consists of 12 870 many-electron states. The resulting spectra contains three basic types of excitations at very different energy ranges: (a) 81 states corresponding to the ground state and magnetic excitations (magnons) within 100 meV; (b) 1215 states of neutral molecular excitations (excitons) with energies from about 1 to 8 eV; and (c) 11 574 charge-transfer states with excitation energies up to 60 eV. Analysis of the properties of the ground states in both alpha and beta solid O-2 has been carried out. The lowest many-body states, those that correspond to neutral, unexcited molecules, describe accurately the magnetic excitations of both solids. The two phases have very different spectra resulting, even at very low temperatures, in a sizeable difference in the (magnetic) entropy. The calculated entropy difference at the observed alpha-beta phase transition temperature agrees surprisingly well with the experimentally measured heat of transformation. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. NR 56 TC 7 Z9 7 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD JUL 15 PY 1995 VL 52 IS 4 BP 2325 EP 2335 DI 10.1103/PhysRevB.52.2325 PG 11 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400029 ER PT J AU TRYGG, J WILLS, JM BROOKS, MSS JOHANSSON, B ERIKSSON, O AF TRYGG, J WILLS, JM BROOKS, MSS JOHANSSON, B ERIKSSON, O TI CALCULATION OF ELASTIC-CONSTANTS IN UC, US, AND UTE SO PHYSICAL REVIEW B LA English DT Article ID NACL-TYPE COMPOUNDS; URANIUM MONOCHALCOGENIDES; ELECTRONIC-STRUCTURE; LIGHT ACTINIDES; BRILLOUIN-ZONE; SPECIAL POINTS; FERMI-SURFACE; HIGH-PRESSURE; SYSTEMS; VOLUME AB The calculated electronic structure and charge density of UC and US are reported. We also report calculations on the elastic constants of the cubic compounds UC, US, and UTe using the local-spin-density approximation (LSDA) to the exchange and correlation potential. Good agreement between calculations and experiment has been obtained for UC and US suggesting that the chemical bonding is well reproduced by LSDA for these two compounds. In contrast, for UTe the calculations do not reproduce the measured negative Poissons ratio (negative C-12). We suggest that the failure to describe the elasticity of UTe reflects the weakness of LSDA in describing accurately electron systems that are strongly correlated and we speculate that UTe is an anomalous, possibly mixed valent, system. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. EUROPEAN INST TRANSURANIUM ELEMENTS, D-76125 KARLSRUHE, GERMANY. RP TRYGG, J (reprint author), UNIV UPPSALA, DEPT PHYS, CONDENSED MATTER THEORY GRP, POB 530, S-75121 UPPSALA, SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 56 TC 26 Z9 26 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JUL 15 PY 1995 VL 52 IS 4 BP 2496 EP 2503 DI 10.1103/PhysRevB.52.2496 PG 8 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400045 ER PT J AU FU, LP BACALZO, FT GILLILAND, GD CHEN, R BAJAJ, KK KLEM, J WOLFORD, DJ AF FU, LP BACALZO, FT GILLILAND, GD CHEN, R BAJAJ, KK KLEM, J WOLFORD, DJ TI MICROSCOPIC MECHANISMS GOVERNING EXCITON-DECAY KINETICS IN TYPE-II GAAS/ALAS SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Article ID QUANTUM-WELL STRUCTURES; GAAS-ALAS SUPERLATTICES; TRANSPORT; TIME AB We have measured the time- and space-resolved evolution of type-II excitons in GaAs/AlAs superlattices with various AlAs layer thicknesses, at temperatures ranging from 1.8 to 30 K. Our photoluminescence (PL) time decay and transport results demonstrate that the exciton-decay kinetics at low temperatures are entirely determined by intrinsic radiative recombination, whereas at higher temperatures, the PL time decays are dominated by nonradiative defect trapping processes. We show that these nonradiative decays do not occur within the layers but are instead localized at the heterointerfaces. The measured lifetimes at 30 K are consistent with our model calculations based on this interpretation. Furthermore, the superlattice and interface-disorder-induced Gamma-X mixing potentials are determined from our low-temperature exciton lifetimes to be 1.3 and 0.2 meV, respectively. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. IOWA STATE UNIV SCI & TECHNOL,CTR MICROELECTR RES,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP FU, LP (reprint author), EMORY UNIV,DEPT PHYS,ATLANTA,GA 30322, USA. NR 21 TC 11 Z9 11 U1 2 U2 5 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 JUL 15 PY 1995 VL 52 IS 4 BP 2682 EP 2687 DI 10.1103/PhysRevB.52.2682 PG 6 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400068 ER PT J AU SPRINGBORG, M AF SPRINGBORG, M TI STRUCTURAL AND ELECTRONIC-PROPERTIES OF POLYMERIC FULLERENE CHAINS SO PHYSICAL REVIEW B LA English DT Article ID DOPED C-60; BUCKMINSTERFULLERENE; SUPERCONDUCTIVITY; LATTICE; C60 AB Properties of polymeric fullerenes are studied theoretically using a semiempirical model that treats only the pi electrons explicitly but allows for lattice relaxations. Both neutral and charged systems are studied, and both the isolated C-60 molecule as well as the polymer. In agreement with experiments, the model predicts the elongation of certain intraball bonds upon polymerization as the most significant structural relaxation. This is found both for the neutral and the charged system. For the latter, we observe symmetry reductions, and it is suggested that polaronlike distortions or charge-density waves may act as charge carriers. The distortions are predicted to induce extra phonon modes that should be observable experimentally. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP SPRINGBORG, M (reprint author), UNIV KONSTANZ,DEPT CHEM,D-78434 CONSTANCE,GERMANY. NR 24 TC 15 Z9 15 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 JUL 15 PY 1995 VL 52 IS 4 BP 2935 EP 2940 DI 10.1103/PhysRevB.52.2935 PG 6 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400096 ER PT J AU ZABINSKY, SI REHR, JJ ANKUDINOV, A ALBERS, RC ELLER, MJ AF ZABINSKY, SI REHR, JJ ANKUDINOV, A ALBERS, RC ELLER, MJ TI MULTIPLE-SCATTERING CALCULATIONS OF X-RAY-ABSORPTION SPECTRA SO PHYSICAL REVIEW B LA English DT Article ID NEAR-EDGE STRUCTURE; FINE-STRUCTURE; PHOTOELECTRON DIFFRACTION; TRANSITION-METALS; THERMAL-EXPANSION; MOLECULES; XANES; CLUSTERS AB A high-order multiple-scattering (MS) approach to the calculation of polarized x-ray-absorption spectra, which includes both x-ray-absorption fine structure and x-ray-absorption near-edge structure, is presented. Efficient calculations in arbitrary systems are carried out by using a curved-wave MS path formalism that ignores negligible paths, and has an energy-dependent self-energy and MS Debye-Waller factors. Embedded-atom background absorption calculations on an absolute energy scale are included. The theory is illustrated for metallic Cu, Cd, and Pt. For these cases the MS expansion is found to converge to within typical experimental accuracy, both to experiment and to full MS theories (e.g., band structure), by using only a few dozen important paths, which are primarily single-scattering, focusing, linear, and triangular. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. MICROSOFT CORP, REDMOND, WA 98052 USA. RP ZABINSKY, SI (reprint author), UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA. NR 68 TC 2090 Z9 2101 U1 8 U2 124 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 JUL 15 PY 1995 VL 52 IS 4 BP 2995 EP 3009 DI 10.1103/PhysRevB.52.2995 PG 15 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400104 ER PT J AU BLASE, X RUBIO, A LOUIE, SG COHEN, ML AF BLASE, X RUBIO, A LOUIE, SG COHEN, ML TI MIXED-SPACE FORMALISM FOR THE DIELECTRIC RESPONSE IN PERIODIC-SYSTEMS SO PHYSICAL REVIEW B LA English DT Note ID DENSITY-FUNCTIONAL APPROACH; BAND-GAPS; SEMICONDUCTORS; INSULATORS; MATRICES; ELECTRON; SILICON AB We present a useful formalism for the calculation of the polarizability and dielectric response of periodic systems. Our approach is to introduce intermediate ''mixed-space'' functions with the full translational periodicity of the lattice. This is a considerable advantage over existing real-space methods since the decay length of a response function [such as epsilon(r,r'\omega)] can be significantly larger than the Wigner-Seitz cell radius. Further, we show that, in supercell calculations, these mixed-space functions decay as fast as the corresponding real-space quantities within one supercell, so that the present scheme can be combined with usual real-space cutoff techniques. The advantage of the present method compared to a standard reciprocal space approach is exemplified for the case of bulk silicon and for the case of a Si surface in a slab geometry. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RI Rubio, Angel/A-5507-2008 OI Rubio, Angel/0000-0003-2060-3151 NR 16 TC 37 Z9 37 U1 0 U2 1 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 JUL 15 PY 1995 VL 52 IS 4 BP R2225 EP R2228 PG 4 WC Physics, Condensed Matter SC Physics GA RM154 UT WOS:A1995RM15400004 ER PT J AU WENESER, J AF WENESER, J TI DERIVATION OF THE SCREENING EFFECTS IN A PLASMA IN STATISTICAL AND THERMAL-EQUILIBRIUM SO PHYSICAL REVIEW D LA English DT Article ID SOLAR MODELS; NEUTRINO AB A derivation of screening effects in a moderately dense equilibrated plasma, based on the methods of finite-temperature field theory, demonstrates the limits of validity of the ''weak screening'' form. Because the systematics of the theory make it possible to unambiguously separate off the leading order e(3) there can be no effects that cancel screening. The static nature of the equilibrium removes questions connected with use of time-response methods for a steady-state problem. The derived screening potential approaches the Debye-Huckel potential at large separations, but is cut off by quantum effects at short distances; the inherent violations of self-consistency in classical derivations of the Debye-Huckel potential are absent. Applied to the conditions of the Sun's central region, screening corrections deviate only moderately from the classical, similar to 15%. The partial degeneracy of electrons also presents only small effects beyond those accounted for by the appropriate population factors. Given the weak role of screening, the effect of the corrections on solar neutrino fluxes is, therefore, seen to be small. RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. NR 15 TC 4 Z9 4 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JUL 15 PY 1995 VL 52 IS 2 BP 640 EP 655 DI 10.1103/PhysRevD.52.640 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ948 UT WOS:A1995RJ94800011 ER PT J AU LUTY, MA MARCHRUSSELL, J MURAYAMA, H AF LUTY, MA MARCHRUSSELL, J MURAYAMA, H TI NEW SYMMETRIES OF SUPERSYMMETRIC EFFECTIVE LAGRANGIANS SO PHYSICAL REVIEW D LA English DT Article ID GOLDSTONE FERMIONS; GAUGE-THEORIES; SIGMA-MODELS; BREAKING AB We consider the structure of effective Lagrangians describing the low-energy dynamics of supersymmetric theories in which a global symmetry G is spontaneously broken to a subgroup H while supersymmetry is unbroken. In accordance with the supersymmetric Goldstone theorem, these Lagrangians contain Nambu-Goldstone superfields associated with a coset space G(c)/($) over cap H, where G(c) is the complexification of G and ($) over cap H is the largest subgroup of G(c) that leaves the order parameter invariant. The Lagrangian may also contain additional light matter fields. To analyze the effective Lagrangian for the matter fields we first consider the case where the effective Lagrangian is obtained by integrating out heavy modes at weak coupling (but including nonperturbative effects such as instantons). We show that the superpotential of the matter fields is H invariant, which can give rise to nontrivial relations among independent H invariants in the superpotential. We also show that the Kahler potential of the matter fields can be restricted by a remnant of ($) over cap H symmetry. These results are nonperturbative and have a simple group-theoretic interpretation. When we relax the weak-coupling constraint, there appear to be additional possibilities for the action of a on the matter fields, hinting that the constraints imposed by ($) over cap H may be even richer in strongly coupled theories. C1 INST ADV STUDY,SCH NAT SCI,PRINCETON,NJ 08540. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP LUTY, MA (reprint author), MIT,CTR THEORET PHYS,CAMBRIDGE,MA 02139, USA. RI Murayama, Hitoshi/A-4286-2011 NR 29 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUL 15 PY 1995 VL 52 IS 2 BP 1190 EP 1203 DI 10.1103/PhysRevD.52.1190 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ948 UT WOS:A1995RJ94800061 ER PT J AU BEHRNDT, K BURWICK, TT AF BEHRNDT, K BURWICK, TT TI TOWARDS QUANTUM COSMOLOGY WITHOUT SINGULARITIES SO PHYSICAL REVIEW D LA English DT Note ID BLACK-HOLE EVAPORATION; 2 DIMENSIONS; GRAVITY AB In this Brief Report we investigate a cosmological solution with singular scalar fields (a moduli held and the dilaton). We show that after quantizing the scalar fields the quantum corrections smooth out the singularities. In addition, we argue that the incorporation of nonperturbative quantum corrections form a dilaton potential. RP BEHRNDT, K (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 13 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JUL 15 PY 1995 VL 52 IS 2 BP 1292 EP 1295 DI 10.1103/PhysRevD.52.1292 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ948 UT WOS:A1995RJ94800072 ER PT J AU CURTRIGHT, T ZACHOS, C AF CURTRIGHT, T ZACHOS, C TI CANONICAL NON-ABELIAN DUAL TRANSFORMATIONS IN SUPERSYMMETRIC FIELD-THEORIES SO PHYSICAL REVIEW D LA English DT Note ID NONLINEAR SIGMA-MODELS AB A generating functional F is found for a canonical non-Abelian dual transformation which maps the supersymmetric chiral O(4) sigma model to an equivalent supersymmetric extension of the dual sigma model. This F produces a mapping between the classical phase spaces of the two theories in which the bosonic (coordinate) fields transform nonlocally, the fermions undergo a local tangent space chiral rotation, and all currents (fermionic and bosonic) mix locally. Purely bosonic; curvature-free currents of the chiral model become a symphysis of purely bosonic and fermion bilinear currents of the dual theory. The corresponding transformation functional T which relates wave functions in the two quantum theories is argued to be exactly given by T = exp(iF). C1 ARGONNE NATL LAB, DIV HIGH ENERGY PHYS, ARGONNE, IL 60439 USA. RP UNIV MIAMI, DEPT PHYS, BOX 248046, CORAL GABLES, FL 33124 USA. RI zachos, cosmas/C-4366-2014; Curtright, Thomas/B-6840-2015; OI zachos, cosmas/0000-0003-4379-3875; Curtright, Thomas/0000-0001-7031-5604 NR 21 TC 16 Z9 16 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 JUL 15 PY 1995 VL 52 IS 2 BP R573 EP R576 DI 10.1103/PhysRevD.52.R573 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ948 UT WOS:A1995RJ94800004 ER PT J AU HOKE, DA GRAY, GT AF HOKE, DA GRAY, GT TI ARRANGEMENT OF DISLOCATION NETWORKS IN HOT-PRESSED TITANIUM DIBORIDE SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article RP HOKE, DA (reprint author), LOS ALAMOS NATL LAB,DIV MAT,LOS ALAMOS,NM 87545, USA. NR 15 TC 1 Z9 2 U1 0 U2 1 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 JUL 15 PY 1995 VL 33 IS 2 BP 171 EP 177 DI 10.1016/0956-716X(95)00014-M PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA RG078 UT WOS:A1995RG07800002 ER PT J AU HUGHES, DA HANSEN, N AF HUGHES, DA HANSEN, N TI HIGH-ANGLE BOUNDARIES AND ORIENTATION DISTRIBUTIONS AT LARGE STRAINS SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article C1 RISO NATL LAB,DEPT MAT,DK-4000 ROSKILDE,DENMARK. RP HUGHES, DA (reprint author), SANDIA NATL LABS,CTR MAT & APPL MECH,LIVERMORE,CA 94550, USA. NR 12 TC 41 Z9 41 U1 0 U2 8 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 JUL 15 PY 1995 VL 33 IS 2 BP 315 EP 321 DI 10.1016/0956-716X(95)00143-J PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA RG078 UT WOS:A1995RG07800023 ER PT J AU SANISHVILI, R VOLZ, KW WESTBROOK, EM MARGOLIASH, E AF SANISHVILI, R VOLZ, KW WESTBROOK, EM MARGOLIASH, E TI THE LOW IONIC-STRENGTH CRYSTAL-STRUCTURE OF HORSE CYTOCHROME-C AT 2.1 ANGSTROM RESOLUTION AND COMPARISON WITH ITS HIGH IONIC-STRENGTH COUNTERPART SO STRUCTURE LA English DT Article DE CYTOCHROME C; GAMMA-TURN; HIGH IONIC STRENGTH STRUCTURE; INTERNAL WATER MOLECULES; LOW IONIC STRENGTH STRUCTURE ID IMAGING PROPORTIONAL COUNTER; SITE-DIRECTED MUTAGENESIS; FERRICYTOCHROME-C; MACROMOLECULAR STRUCTURES; CONFORMATION CHANGE; FERROCYTOCHROME-C; REFINEMENT; PROTEIN; CRYSTALLOGRAPHY; CHAIN AB Background: Cytochrome c is an integral part of the mitochondrial respiratory chain. It is confined to the intermembrane space of mitochondria, and has the function of transferring electrons between its redox partners. Solution studies of cytochrome c indicate that the conformation of the molecule is sensitive to the ionic strength of the medium. Results: The crystal structures of cytochromes c from several species have been solved at extremely high ionic strengths of near-saturated solutions of ammonium sulfate. Here we present the first crystal structure of ferricytochrome c at low ionic strength refined at 2.1 Angstrom resolution. In general, the structure has the same features as those determined earlier. However, there are some differences in both backbone and side-chain conformations in several areas. These areas coincide with those observed by NMR and resonance Raman spectroscopy to be sensitive to ionic strength. Conclusions: Neither ionic strength nor crystal-packing interactions have much influence on the conformation of horse cytochrome c. Nevertheless, some differences in the side-chain conformations at high and low ionic strengths may be important for understanding how the protein functions. Close examination of the gamma-turn (residues 27-29) conserved in cytochromes c leads us to propose the 'negative classical' gamma-turn to describe this unusual feature. C1 UNIV ILLINOIS,DEPT BIOL SCI,MOLEC BIOL LAB,CHICAGO,IL 60607. UNIV ILLINOIS,DEPT MICROBIOL & IMMUNOL,CHICAGO,IL 60612. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. FU NIAID NIH HHS [AI 12001]; NIGMS NIH HHS [GM 19121] NR 41 TC 65 Z9 66 U1 2 U2 15 PU CURRENT BIOLOGY LTD PI LONDON PA 34-42 CLEVELAND STREET, LONDON, ENGLAND W1P 6LB SN 0969-2126 J9 STRUCTURE JI Structure PD JUL 15 PY 1995 VL 3 IS 7 BP 707 EP 716 DI 10.1016/S0969-2126(01)00205-2 PG 10 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA RL700 UT WOS:A1995RL70000010 PM 8591047 ER PT J AU NANTEL, M KIEFFER, JC ENRIGHT, GD VILLENEUVE, DM DUNN, J WAN, AS WALLING, RS SCOTT, H OSTERHELD, A PEYRUSSE, O AF NANTEL, M KIEFFER, JC ENRIGHT, GD VILLENEUVE, DM DUNN, J WAN, AS WALLING, RS SCOTT, H OSTERHELD, A PEYRUSSE, O TI SPECTROSCOPY AND GAIN DYNAMICS ISSUES IN INHOMOGENEOUS X-RAY LASER PLASMAS SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID GERMANIUM; FOIL; SPECTRA AB Time- and two-dimensional spatially-resolved monochromatic imaging is performed on Ne-like germanium laser-produced line plasmas to study the behaviour of the inhomogeneities along the line created by a nonuniform irradiation. The imaging is done at the wavelengths of the 2s2p(6)3d-2s(2)2p(6)(J=2-0) E2 quadrupole line (lambda=8.031 Angstrom) and the 2s2p(6)3p-2s(2)2p(6)(J=1-0) 3A dipole line (lambda=8.371 Angstrom) which originate respectively from the upper and lower states of the core-excited 3d-3p x-ray laser line at 199 Angstrom. We compare the E2 and 3A results to LASNEX hydrodynamics and associated atomic physics, and investigate the problem of extracting the 3d-3p local gain dynamics along the inhomogeneous line plasma from spectroscopic imaging of the plasma. The effect of the irradiation uniformity conditions on the integrated lasing intensity is discussed. C1 INRS ENERGIE & MAT,VARENNES,PQ J3X 1S2,CANADA. NATL RES COUNCIL CANADA,STEACIE INST MOLEC SCI,OTTAWA,ON K1A 0R6,CANADA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CEA LIMEIL VALENTON,VILLENEUVE ST GEO,FRANCE. RI Villeneuve, David/I-4140-2012 OI Villeneuve, David/0000-0002-2810-3648 NR 39 TC 3 Z9 3 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 JUL 14 PY 1995 VL 28 IS 13 BP 2765 EP 2780 DI 10.1088/0953-4075/28/13/026 PG 16 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA RK877 UT WOS:A1995RK87700026 ER PT J AU GOVER, A VANAMERSFOORT, W COLSON, WB MIMA, K WARREN, R AF GOVER, A VANAMERSFOORT, W COLSON, WB MIMA, K WARREN, R TI NEW LIGHT ON FREE-ELECTRON LASERS SO SCIENCE LA English DT Letter C1 TEL AVIV UNIV,DEPT ELECT ENGN PHYS ELECTR,IL-69978 TEL AVIV,ISRAEL. FOM,INST PLASMA PHYS,3430 BF NIEUWEGEIN,NETHERLANDS. USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. OSAKA UNIV,INST LASER ENGN,OSAKA 565,JAPAN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP GOVER, A (reprint author), TEL AVIV UNIV,INT FEL EXECUT COMM,AD HOC COMM,IL-69978 TEL AVIV,ISRAEL. NR 2 TC 0 Z9 0 U1 0 U2 1 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JUL 14 PY 1995 VL 269 IS 5221 BP 148 EP 149 DI 10.1126/science.269.5221.148-a PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RJ029 UT WOS:A1995RJ02900010 PM 17789830 ER PT J AU SHKROB, IA TRIFUNAC, AD AF SHKROB, IA TRIFUNAC, AD TI FREE D-ATOMS IN PULSE-RADIOLYSIS OF METHANE IN CRYOGENIC FLUIDS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID TIME-RESOLVED EPR; ELECTRON-PARAMAGNETIC RESONANCE; WATER RADIOLYSIS; LIQUID-NITROGEN; HYDROGEN-ATOMS; CIDEP; POLARIZATION; RADICALS; MIXTURES; ETHANE AB Spin-echo and free induction decay (FID) detected electron paramagnetic resonance were applied to detect free D atoms in the pulse radiolysis of CD4 in liquid argon, krypton, xenon, and nitrogen at 77-160 K. The D atoms were polarized through chemically induced dynamic electron polarization in random encounters. The decay of polarization was essentially independent of the fraction of methane (1-70 mol %) and the temperature of the liquid solution. Analysis of the polarization decay kinetics and the D atoms yield suggests that ion reactions dominate over energy transfer reactions in these mixtures (except for xenon solutions). In solid CD4-Ar mixtures a satellite resonance line of unusually polarized D atoms was observed. This indicates microheterogeneous nature of these solid mixtures and explains anomalous chemistry observed in the media. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 54 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 13 PY 1995 VL 99 IS 28 BP 11122 EP 11130 DI 10.1021/j100028a012 PG 9 WC Chemistry, Physical SC Chemistry GA RK018 UT WOS:A1995RK01800012 ER PT J AU LAFOSSE, DR HUA, PF SARANTITES, DG BAKTASH, C AKOVALI, YA BRINKMAN, M CEDERWALL, B CRISTANCHO, F DORING, J GROSS, CJ JIN, HQ KOROLIJA, M LANDULFO, E LEE, IY MACCHIAVELLI, AO MAIER, MR RATHBUN, W SALADIN, JX STRACENER, DW TABOR, SL VANDERMOLLEN, A WERNER, TR AF LAFOSSE, DR HUA, PF SARANTITES, DG BAKTASH, C AKOVALI, YA BRINKMAN, M CEDERWALL, B CRISTANCHO, F DORING, J GROSS, CJ JIN, HQ KOROLIJA, M LANDULFO, E LEE, IY MACCHIAVELLI, AO MAIER, MR RATHBUN, W SALADIN, JX STRACENER, DW TABOR, SL VANDERMOLLEN, A WERNER, TR TI CHARACTERIZATION OF THE FIRST SUPERDEFORMED BAND IN THE A-APPROXIMATE-TO-80 REGION SO PHYSICS LETTERS B LA English DT Article ID NUCLEI AB The recently discovered superdeformed band in one of the strontium isotopes has been identified as belonging to Sr-83 from a study with the Gammasphere array and the Microball charged-particle detector system. From its decay pattern, a spin of (81 +/- 2)/2 ($) over bar h is deduced for the highest level of this band. Evidence for very fast transition rates and agreement of the characteristics of this band with the theoretical predictions establish the yrast superdeformed nature of this band in Sr-83. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. UNIV PITTSBURGH,DEPT PHYS,PITTSBURGH,PA 15260. OAK RIDGE INST SCI EDUC,UNISOR,OAK RIDGE,TN 37831. RUTGERS STATE UNIV,DEPT PHYS,NEW BRUNSWICK,NJ 08903. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. UNIV WARSAW,INST THEORET PHYS,PL-00681 WARSAW,POLAND. RP LAFOSSE, DR (reprint author), WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130, USA. RI Landulfo, Eduardo/B-7979-2012; Cederwall, Bo/M-3337-2014 OI Landulfo, Eduardo/0000-0002-9691-5306; Cederwall, Bo/0000-0003-1771-2656 NR 19 TC 28 Z9 28 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 JUL 13 PY 1995 VL 354 IS 1-2 BP 34 EP 40 DI 10.1016/0370-2693(95)00499-B PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RK005 UT WOS:A1995RK00500006 ER PT J AU DERRICK, M KRAKAUER, D MAGILL, S MIKUNAS, D MUSGRAVE, B REPOND, J STANEK, R TALAGA, RL ZHANG, H AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CONTIN, A CORRADI, M GIALAS, I GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, 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 ECKERT, M FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HAAS, T HARTMANN, H HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C 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, SS YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A CARTIGLIA, N PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S ZHU, Q BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BEIER, H BIENLEIN, JK COLDEWEY, C DEPPE, O DESLER, K DREWS, G FLASINSKI, M GILKINSON, DJ GLASMAN, C GOTTLICHER, P GROSSEKNETTER, J GUTJAHR, B HAIN, W HASSELL, D HESSLING, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MONTEIRO, T NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M ROLDAN, J SCHNEEKLOTH, U SCHULZ, W SELONKE, F STILIARIS, E SURROW, B VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C ZHOU, JF GRABOSCH, HJ KHARCHILAVA, A LEICH, A MATTINGLY, MCK MEYER, A SCHLENSTEDT, S WULFF, N BARBAGLI, G PELFER, P ANZIVINO, G MACCARRONE, G DEPASQUALE, S VOTANO, L BAMBERGER, A EISENHARDT, S FREIDHOF, A SOLDNERREMBOLD, S SCHROEDER, J TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, JI SAXON, DH UTLEY, ML WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD HAGGE, L LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W ZETSCHE, F BACON, TC BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BYH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ WANG, SM WU, JT ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G FERNANDEZ, JP GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L MARTINEZ, M DELPESO, J PUGA, J TERRON, J DETROCONIZ, JF SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG PATEL, PM SINCLAIR, LE STAIRS, DG LAURENT, MS ULLMANN, R ZACEK, G 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 BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEKAMPS, M KOOIJMAN, P KRUSE, A 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 BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE HARNEW, N LANCASTER, M LINDEMANN, L MCFALL, JD NATH, C NOYES, VA QUADT, A TICKNER, JR UIJTERWAAL, H WALCZAK, R WATERS, DS WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G MARINI, G NIGRO, A TASSI, E HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W RAHN, JT SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ SCHWARZER, O WALENTA, AH ZECH, G ABRAMOWICZ, H BRISKIN, G DAGAN, S LEVY, A HASEGAWA, T HAZUMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAKAMITSU, Y YAMAUCHI, K 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, RL SHULMAN, J BLANKENSHIP, K 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 KARSHON, U REVEL, D ZERZION, D ALI, I BADGETT, WF BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERSTEIN, S SMITH, WH VAICIULIS, A WODARCZYK, M TSURUGAI, T BHADRA, S CARDY, ML FAGERSTROEM, CP FRISKEN, WR FURUTANI, KM KHAKZAD, M SCHMIDKE, WB AF DERRICK, M KRAKAUER, D MAGILL, S MIKUNAS, D MUSGRAVE, B REPOND, J STANEK, R TALAGA, RL ZHANG, H AYAD, R BARI, G BASILE, M BELLAGAMBA, L BOSCHERINI, D BRUNI, A BRUNI, G BRUNI, P ROMEO, GC CASTELLINI, G CHIARINI, M CIFARELLI, L CINDOLO, F CONTIN, A CORRADI, M GIALAS, I GIUSTI, P IACOBUCCI, G LAURENTI, G LEVI, 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 ECKERT, M FELD, L FREY, A GEERTS, M GEITZ, G GROTHE, M HAAS, T HARTMANN, H HEINLOTH, K HILGER, E JAKOB, HP KATZ, UF MARI, SM MASS, A MENGEL, S MOLLEN, J PAUL, E REMBSER, C 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, SS YOSHIDA, R RAU, RR ARNEODO, M IANNOTTI, L SCHIOPPA, M SUSINNO, G BERNSTEIN, A CALDWELL, A CARTIGLIA, N PARSONS, JA RITZ, S SCIULLI, F STRAUB, PB WAI, L YANG, S ZHU, Q BORZEMSKI, P CHWASTOWSKI, J ESKREYS, A PIOTRZKOWSKI, K ZACHARA, M ZAWIEJSKI, L ADAMCZYK, L BEDNAREK, B JELEN, K KISIELEWSKA, D KOWALSKI, T RULIKOWSKAZAREBSKA, E SUSZYCKI, L ZAJAC, J KOTANSKI, A PRZYBYCIEN, M BAUERDICK, LAT BEHRENS, U BEIER, H BIENLEIN, JK COLDEWEY, C DEPPE, O DESLER, K DREWS, G FLASINSKI, M GILKINSON, DJ GLASMAN, C GOTTLICHER, P GROSSEKNETTER, J GUTJAHR, B HAIN, W HASSELL, D HESSLING, H IGA, Y JOOS, P KASEMANN, M KLANNER, R KOCH, W KOPKE, L KOTZ, U KOWALSKI, H LABS, J LADAGE, A LOHR, B LOWE, M LUKE, D MAINUSCH, J MANCZAK, O MONTEIRO, T NG, JST NICKEL, S NOTZ, D OHRENBERG, K ROCO, M ROHDE, M ROLDAN, J SCHNEEKLOTH, U SCHULZ, W SELONKE, F STILIARIS, E SURROW, B VOSS, T WESTPHAL, D WOLF, G YOUNGMAN, C ZHOU, JF GRABOSCH, HJ KHARCHILAVA, A LEICH, A MATTINGLY, MCK MEYER, A SCHLENSTEDT, S WULFF, N BARBAGLI, G PELFER, P ANZIVINO, G MACCARRONE, G DEPASQUALE, S VOTANO, L BAMBERGER, A EISENHARDT, S FREIDHOF, A SOLDNERREMBOLD, S SCHROEDER, J TREFZGER, T BROOK, NH BUSSEY, PJ DOYLE, AT FLECK, JI SAXON, DH UTLEY, ML WILSON, AS DANNEMANN, A HOLM, U HORSTMANN, D NEUMANN, T SINKUS, R WICK, K BADURA, E BUROW, BD HAGGE, L LOHRMANN, E MILEWSKI, J NAKAHATA, M PAVEL, N POELZ, G SCHOTT, W ZETSCHE, F BACON, TC BUTTERWORTH, I GALLO, E HARRIS, VL HUNG, BYH LONG, KR MILLER, DB MORAWITZ, PPO PRINIAS, A SEDGBEER, JK WHITFIELD, AF MALLIK, U MCCLIMENT, E WANG, MZ WANG, SM WU, JT ZHANG, Y CLOTH, P FILGES, D AN, SH HONG, SM NAM, SW PARK, SK SUH, MH YON, SH IMLAY, R KARTIK, S KIM, HJ MCNEIL, RR METCALF, W NADENDLA, VK BARREIRO, F CASES, G FERNANDEZ, JP GRACIANI, R HERNANDEZ, JM HERVAS, L LABARGA, L MARTINEZ, M DELPESO, J PUGA, J TERRON, J DETROCONIZ, JF SMITH, GR CORRIVEAU, F HANNA, DS HARTMANN, J HUNG, LW LIM, JN MATTHEWS, CG PATEL, PM SINCLAIR, LE STAIRS, DG LAURENT, MS ULLMANN, R ZACEK, G 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 BOTJE, M CHLEBANA, F DAKE, A ENGELEN, J DEKAMPS, M KOOIJMAN, P KRUSE, A 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 BYRNE, A CASHMORE, RJ COOPERSARKAR, AM DEVENISH, RCE HARNEW, N LANCASTER, M LINDEMANN, L MCFALL, JD NATH, C NOYES, VA QUADT, A TICKNER, JR UIJTERWAAL, H WALCZAK, R WATERS, DS WILSON, FF YIP, T ABBIENDI, G BERTOLIN, A BRUGNERA, R CARLIN, R DALCORSO, F DEGIORGI, M DOSSELLI, U LIMENTANI, S MORANDIN, M POSOCCO, M STANCO, L STROILI, R VOCI, C BULMAHN, J BUTTERWORTH, JM FEILD, RG OH, BY WHITMORE, JJ DAGOSTINI, G MARINI, G NIGRO, A TASSI, E HART, JC MCCUBBIN, NA PRYTZ, K SHAH, TP SHORT, TL BARBERIS, E DUBBS, T HEUSCH, C VANHOOK, M HUBBARD, B LOCKMAN, W RAHN, JT SADROZINSKI, HFW SEIDEN, A BILTZINGER, J SEIFERT, RJ SCHWARZER, O WALENTA, AH ZECH, G ABRAMOWICZ, H BRISKIN, G DAGAN, S LEVY, A HASEGAWA, T HAZUMI, M ISHII, T KUZE, M MINE, S NAGASAWA, Y NAKAO, M SUZUKI, I TOKUSHUKU, K YAMADA, S YAMAZAKI, Y CHIBA, M HAMATSU, R HIROSE, T HOMMA, K KITAMURA, S NAKAMITSU, Y YAMAUCHI, K 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, RL SHULMAN, J BLANKENSHIP, K 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 KARSHON, U REVEL, D ZERZION, D ALI, I BADGETT, WF BEHRENS, B DASU, S FORDHAM, C FOUDAS, C GOUSSIOU, A LOVELESS, RJ REEDER, DD SILVERSTEIN, S SMITH, WH VAICIULIS, A WODARCZYK, M TSURUGAI, T BHADRA, S CARDY, ML FAGERSTROEM, CP FRISKEN, WR FURUTANI, KM KHAKZAD, M SCHMIDKE, WB TI STUDY OF THE PHOTON REMNANT IN RESOLVED PHOTOPRODUCTION AT HERA SO PHYSICS LETTERS B LA English DT Article ID DEEP-INELASTIC-SCATTERING; ZEUS BARREL CALORIMETER; GAMMA-P INTERACTIONS; PARTON DISTRIBUTIONS; HADRON-COLLISIONS; HARD SCATTERING; MONTE-CARLO; CONSTRUCTION; COLLIDER; DESIGN AB Photoproduction at HERA is studied in ep collisions, with the ZEUS detector, for yp centre-of-mass energies ranging from 130-270 GeV. A sample of events with two high-p(T) jets (p(T) > 6 GeV, eta < 1.6) and a third cluster in the approximate direction of the electron beam is isolated using a clustering algorithm. These events are mostly due to resolved photoproduction. The third duster is identified as the photon remnant, Its properties, such as the transverse and longitudinal energy flows around the axis of the cluster, are consistent with those commonly attributed to jets, and in particular with those found for the two jets in these events. The mean value of the photon remnant p(T) with respect to the beam axis is measured to be 2.1 +/- 0.2 GeV, which demonstrates substantial mean transverse momenta for the photon remnant. C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. UNIV BOLOGNA, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. UNIV BONN, INST PHYS, W-5300 BONN, GERMANY. UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. UNIV CALABRIA, DEPT PHYS, I-87036 COSENZA, ITALY. IST NAZL FIS NUCL, COSENZA, ITALY. COLUMBIA UNIV, NEVIS LABS, IRVINGTON, NY USA. INST PHYS NUCL LYON, KRAKOW, POLAND. AGH UNIV SCI & TECHNOL, FAC PHYS & NUCL TECH, KRAKOW, POLAND. JAGIELLONIAN UNIV, DEPT PHYS, KRAKOW, POLAND. DESY, W-2000 HAMBURG, GERMANY. DESY, INST HOCHENERGIEPHYS, ZEUTHEN, GERMANY. UNIV FLORENCE, I-50121 FLORENCE, ITALY. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY. UNIV FREIBURG, FAK PHYS, W-7800 FREIBURG, GERMANY. UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW, LANARK, SCOTLAND. UNIV HAMBURG, INST EXP PHYS 1, HAMBURG, GERMANY. UNIV HAMBURG, INST EXP PHYS 2, HAMBURG, GERMANY. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, HIGH ENERGY NUCL PHYS GRP, LONDON, ENGLAND. UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA. FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST KERNPHYS, W-5170 JULICH, GERMANY. KOREA UNIV, SEOUL 136701, SOUTH KOREA. LOUISIANA STATE UNIV, DEPT PHYS & ASTRON, BATON ROUGE, LA 70803 USA. UNIV AUTONOMA MADRID, DEPT FIS TEOR, MADRID, SPAIN. UNIV MANITOBA, DEPT PHYS, WINNIPEG, MB R3T 2N2, CANADA. MCGILL UNIV, DEPT PHYS, MONTREAL, PQ, CANADA. MOSCOW PHYS ENGN INST, MOSCOW, RUSSIA. MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW, RUSSIA. NIKHEF, AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, AMSTERDAM, NETHERLANDS. OHIO STATE UNIV, DEPT PHYS, COLUMBUS, OH 43210 USA. UNIV OXFORD, DEPT PHYS, OXFORD, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, PADUA, ITALY. IST NAZL FIS NUCL, PADUA, ITALY. PENN STATE UNIV, DEPT PHYS, UNIVERSITY PK, PA 16802 USA. UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY. IST NAZL FIS NUCL, ROME, ITALY. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY. TEL AVIV UNIV, SCH PHYS, TEL AVIV, ISRAEL. UNIV TOKYO, INST NUCL STUDY, TOKYO, JAPAN. TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO, JAPAN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, TURIN, ITALY. IST NAZL FIS NUCL, I-10125 TURIN, ITALY. UNIV TURIN, FAC SCI 2, ALESSANDRIA, ITALY. IST NAZL FIS NUCL, ALESSANDRIA, ITALY. UNIV TORONTO, DEPT PHYS, TORONTO, ON M5S 1A1, CANADA. UCL, DEPT PHYS & ASTRON, LONDON, ENGLAND. VIRGINIA POLYTECH INST & STATE UNIV, DEPT PHYS, BLACKSBURG, VA 24061 USA. WARSAW UNIV, INST PHYS EXPTL, WARSAW, POLAND. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. WEIZMANN INST SCI, DEPT PHYS NUCL, IL-76100 REHOVOT, ISRAEL. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. MEIJI GAKUIN UNIV, FAC GEN EDUC, YOKOHAMA, KANAGAWA, JAPAN. YORK UNIV, DEPT PHYS, N YORK, ON M3J 1P3, CANADA. IROE, FLORENCE, ITALY. RI Solomin, Anatoly/C-3072-2016; 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; Tassi, Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; Morandin, Mauro/A-3308-2016; Bashkirov, Vladimir/A-4818-2008; De Pasquale, Salvatore/B-9165-2008; Lancaster, Mark/C-1693-2008; Doyle, Anthony/C-5889-2009 OI Graciani Diaz, Ricardo/0000-0001-7166-5198; Anzivino, Giuseppina/0000-0002-5967-0952; Castellini, Guido/0000-0002-0177-0643; Lancaster, Mark/0000-0002-8872-7292; Utley, Martin/0000-0001-9928-1516; 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 37 TC 29 Z9 29 U1 0 U2 2 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 JUL 13 PY 1995 VL 354 IS 1-2 BP 163 EP 177 DI 10.1016/0370-2693(95)00650-A PG 15 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RK005 UT WOS:A1995RK00500025 ER PT J AU ECKERT, J JENSEN, CM KOETZLE, TF LEHUSEBO, T NICOL, J WU, P AF ECKERT, J JENSEN, CM KOETZLE, TF LEHUSEBO, T NICOL, J WU, P TI INELASTIC NEUTRON-SCATTERING STUDIES OF IRIH2(H-2)(PPR3I)(2) AND NEUTRON-DIFFRACTION STRUCTURE DETERMINATION OF IRIH2(H-2)(PPR3I)(2)CENTER-DOT-C10H8 - IMPLICATIONS ON THE MECHANISM OF THE INTERCONVERSION OF DIHYDROGEN AND HYDRIDE LIGANDS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID MOLECULAR-HYDROGEN COMPLEXES; EXTREMELY LOW BARRIER; REVERSIBLE LOSS; SOLID-STATE; IRIDIUM; ROTATION; DYNAMICS C1 UNIV HAWAII,DEPT CHEM,HONOLULU,HI 96822. BROOKHAVEN NATL LAB,UPTON,NY 11973. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. RP ECKERT, J (reprint author), LOS ALAMOS NATL LAB,LANCE,MS H805,POB 1663,LOS ALAMOS,NM 87545, USA. NR 23 TC 28 Z9 28 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUL 12 PY 1995 VL 117 IS 27 BP 7271 EP 7272 DI 10.1021/ja00132a038 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA RJ035 UT WOS:A1995RJ03500038 ER PT J AU SPIELMANN, HP WEMMER, DE JACOBSEN, JP AF SPIELMANN, HP WEMMER, DE JACOBSEN, JP TI SOLUTION STRUCTURE OF A DNA COMPLEX WITH THE FLUORESCENT BIS-INTERCALATOR TOTO DETERMINED BY NMR-SPECTROSCOPY SO BIOCHEMISTRY LA English DT Article ID NUCLEAR MAGNETIC-RESONANCE; ECHINOMYCIN BINDING-SITES; MATRIX ANALYSIS; STRANDED-DNA; NA-23 NMR; DITERCALINIUM; H-1-NMR; SEQUENCE; RELAXATION; P-31-NMR AB We have used two-dimensional H-1 NMR spectroscopy to determine the solution structure of the DNA oligonucleotide d(5'-CGCTAGCG-3')2 complexed with the bis-intercalating dye 1.1'-(4.4.8.8-tetramethyl-4,8-diazaundecamethylene)bis 1,3-thiazolyl-2-methlidene)qui nolinium] tetraiodide (TOTO), The determination of the structure was based on total relaxation matrix analysis of the NOESY cross-peak intensities using the program MARDIGRAS. Improved procedures to consider the experimental ''noise'' in NOESY spectra during these calculations have been employed. The NOE-derived distance restraints were applied in restrained molecular dynamics calculations. Twenty final structures each were generated for the TOTO complex from both A-form and B-form dsDNA starting structures, The root-mean-square (rms) deviation of the coordinates for the 40 structures of the complex was 1,45 Angstrom. The local DNA structure is distorted in the complex. The helix is unwound by 60 degrees and has an overall helical repeat of 12 base pairs, caused by bis-intercalation of TOTO, The poly(propylenamine) linker chain is located in the minor groove of dsDNA. Calculations indicate that the benzothiazole ring system is twisted relative to the quinoline in the uncomplexed TOTO molecule. The site selectivity of TOTO for the CTAG-CTAG site is explained by its ability to adapt to the base pair propeller twist of dsDNA to optimize stacking and the hydrophobic interaction between the thymidine methyl group and the benzothiazole ring. There is a 3000-fold fluorescence enhancement upon binding of TOTO to dsDNA. Rotation about the cyanine methine bonds is possible in free TOTO, allowing relaxation nonradiatively. When bound to dsDNA, the benzothiazole ring and the quinolinium ring are clamped by the nucleobases preventing this rotation, and the chromophore loses excitation energy by fluorescence instead. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV STRUCT BIOL,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. ODENSE UNIV,DEPT CHEM,DK-5230 ODENSE,DENMARK. FU NIGMS NIH HHS [GM-14966, GM-43219] NR 44 TC 123 Z9 125 U1 1 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUL 11 PY 1995 VL 34 IS 27 BP 8542 EP 8553 DI 10.1021/bi00027a004 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH991 UT WOS:A1995RH99100004 PM 7612596 ER PT J AU GORST, CM ZHOU, ZH MA, KS TENG, Q HOWARD, JB ADAMS, MWW LAMAR, GN AF GORST, CM ZHOU, ZH MA, KS TENG, Q HOWARD, JB ADAMS, MWW LAMAR, GN TI PARTICIPATION OF THE DISULFIDE BRIDGE IN THE REDOX CYCLE OF THE FERREDOXIN FROM THE HYPERTHERMOPHILE PYROCOCCUS-FURIOSUS - H-1 NUCLEAR-MAGNETIC-RESONANCE TIME RESOLUTION OF THE 4 REDOX STATES AT AMBIENT-TEMPERATURE SO BIOCHEMISTRY LA English DT Article ID ARCHAEBACTERIUM; PROTEINS; H-1-NMR; CLUSTER AB The oxidized and reduced forms of the (4Fe-4S]-containing ferredoxin from the hyperthermophilic archaeon Pyrococcus furiosus, Pf, have been investigated by H-1 nuclear magnetic resonance spectroscopy, electron paramagnetic resonance spectroscopy and thiol titrations. We have identified and isolated at ambient temperature four distinct redox states for the [4Fe-4S] form of the ferredoxin. These states differ in the redox state of the cluster, which is coordinated by Cys 11, Asp 14, Cys 17, and Cys 56, and of a disulfide bridge between Cys 21 and Cys 48, The protein, as isolated under anaerobic conditions, designated 4Fe Fd(B)(red), contains the reduced cluster and two free thiols. The cluster, but not the thiols, is readily oxidized by brief exposure to O-2 to yield 4Fe Fd(B)(ox). Prolonged O-2 treatment (> 24 h at 30 degrees C) is required to generate the protein with a disulfide (4Fe Fd(A)(ox)) while this fully oxidized form is readily converted by brief reduction with sodium dithionite to the protein with a reduced cluster and a disulfide (4Fe Fd(A)(red)), Analyses of the magnitude and the number of hyperfine-shifted resonances in each of the four redox states are discussed. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM,DAVIS,CA 95616. UNIV GEORGIA,DEPT BIOCHEM & MOLEC BIOL,ATHENS,GA 30602. UNIV MINNESOTA,DEPT BIOCHEM,MINNEAPOLIS,MN 55455. FU NIGMS NIH HHS [GM45597] NR 27 TC 33 Z9 34 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUL 11 PY 1995 VL 34 IS 27 BP 8788 EP 8795 DI 10.1021/bi00027a030 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH991 UT WOS:A1995RH99100030 PM 7612619 ER PT J AU GEOHEGAN, DB PURETZKY, AA AF GEOHEGAN, DB PURETZKY, AA TI DYNAMICS OF LASER-ABLATION PLUME PENETRATION THROUGH LOW-PRESSURE BACKGROUND GASES SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSPORT C1 RUSSIAN ACAD SCI,INST SPECT,TROITSK 142092,RUSSIA. RP GEOHEGAN, DB (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. RI Puretzky, Alexander/B-5567-2016; Geohegan, David/D-3599-2013 OI Puretzky, Alexander/0000-0002-9996-4429; Geohegan, David/0000-0003-0273-3139 NR 12 TC 172 Z9 174 U1 2 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 JUL 10 PY 1995 VL 67 IS 2 BP 197 EP 199 DI 10.1063/1.114665 PG 3 WC Physics, Applied SC Physics GA RH056 UT WOS:A1995RH05600017 ER PT J AU OKS, EM BROWN, IG DICKINSON, MR MACGILL, RA EMIG, H SPADTKE, P WOLF, BH AF OKS, EM BROWN, IG DICKINSON, MR MACGILL, RA EMIG, H SPADTKE, P WOLF, BH TI ELEVATED ION CHARGE STATES IN VACUUM ARE PLASMAS IN A MAGNETIC-FIELD SO APPLIED PHYSICS LETTERS LA English DT Article C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. GESELL SCHWERIONENFORSCH MBH,D-64220 DARMSTADT,GERMANY. RP OKS, EM (reprint author), RUSSIAN ACAD SCI,STATE ACAD CONTROL SYST & RADIOELECTR,INST HIGH CURRENT ELECTR,TOMSK 634050,RUSSIA. RI Oks, Efim/A-9409-2014 OI Oks, Efim/0000-0002-9323-0686 NR 13 TC 67 Z9 69 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 JUL 10 PY 1995 VL 67 IS 2 BP 200 EP 202 DI 10.1063/1.114666 PG 3 WC Physics, Applied SC Physics GA RH056 UT WOS:A1995RH05600018 ER PT J AU IWASE, A REHN, LE BALDO, PM FUNK, L AF IWASE, A REHN, LE BALDO, PM FUNK, L TI INTERCASCADE ANNIHILATION OF FREELY MIGRATING DEFECTS SO APPLIED PHYSICS LETTERS LA English DT Article ID IRRADIATION; EFFICIENCIES; SEGREGATION; IONS C1 JAPAN ATOM ENERGY RES INST,ADV SCI RES CTR,TOKAI,IBARAKI 31911,JAPAN. RP IWASE, A (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 13 TC 10 Z9 10 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD JUL 10 PY 1995 VL 67 IS 2 BP 229 EP 231 DI 10.1063/1.114676 PG 3 WC Physics, Applied SC Physics GA RH056 UT WOS:A1995RH05600028 ER PT J AU LIU, X PRASAD, A NISHIO, J WEBER, ER LILIENTALWEBER, Z WALUKIEWICZ, W AF LIU, X PRASAD, A NISHIO, J WEBER, ER LILIENTALWEBER, Z WALUKIEWICZ, W TI NATIVE POINT-DEFECTS IN LOW-TEMPERATURE-GROWN GAAS SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; SEMI-INSULATING GAAS; DOPED GAAS; ANTISITE; LAYERS C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP LIU, X (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. RI Liliental-Weber, Zuzanna/H-8006-2012 NR 20 TC 185 Z9 188 U1 1 U2 11 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 JUL 10 PY 1995 VL 67 IS 2 BP 279 EP 281 DI 10.1063/1.114782 PG 3 WC Physics, Applied SC Physics GA RH056 UT WOS:A1995RH05600045 ER PT J AU HE, Q CHRISTEN, DK KLABUNDE, CE TKACZYK, JE LAY, KW PARANTHAMAN, M THOMPSON, JR GOYAL, A PEDRAZA, AJ KROEGER, DM AF HE, Q CHRISTEN, DK KLABUNDE, CE TKACZYK, JE LAY, KW PARANTHAMAN, M THOMPSON, JR GOYAL, A PEDRAZA, AJ KROEGER, DM TI HIGH-CURRENT SUPERCONDUCTING TL1BA2CA2CU3OY THICK-FILMS ON POLYCRYSTALLINE AG BY SPIN-COATING SO APPLIED PHYSICS LETTERS LA English DT Article ID BA-CU-OXIDE; TEMPERATURE; VAPOR; TL2O C1 GE CO,CORP RES & DEV,SCHENECTADY,NY 12301. RP HE, Q (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 14 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 JUL 10 PY 1995 VL 67 IS 2 BP 294 EP 296 DI 10.1063/1.114787 PG 3 WC Physics, Applied SC Physics GA RH056 UT WOS:A1995RH05600050 ER PT J AU BLANDHAWTHORN, J EKERS, RD VANBREUGEL, W KOEKEMOER, A TAYLOR, K AF BLANDHAWTHORN, J EKERS, RD VANBREUGEL, W KOEKEMOER, A TAYLOR, K TI EXTRAGALACTIC IONIZED HYDROGEN IN THE FORNAX CLUSTER SO ASTROPHYSICAL JOURNAL LA English DT Article DE INTERGALACTIC MEDIUM; QUASARS, ABSORPTION LINES; TECHNIQUES, INTERFEROMETRIC; TECHNIQUES, SPECTROSCOPIC ID ALPHA EMISSION; 3C-273; CLOUDS; FOREST AB The radio galaxy Fornax A is well known for its giant radio lobes which extend almost a degree (similar to 300 kpc) across the sky. Fomalont et al, have shown that these lobes are linearly polarized on the largest scales, although the western lobe is highly depolarized in discrete, resolved regions. The depolarized regions indicate the presence of ionized gas (Faraday screen) along the line of sight to the western lobe. We have now detected the warm gas at H alpha using a Fabry-Perot interferometer in a way that allows us to reach very low surface brightness levels (<10(-19) erg cm(-2) s(-1) arcsec(-2)). The radial velocity of the ionized gas (1610 km s(-1)) places it in the Fornax cluster at a projected radius of 1.0 Mpc, The gas is spread over a region 10 kpc in diameter and has an ionized mass of 6 x 10(7) f(-0.5) M. (where f is the volume filling factor). For the inferred column density of electrons (approximate to 2.6 x 10(20) f(-0.5) cm(-2)) and in light of the H I upper limits (<4 x 10(19) cm(-2)), the cloud has to be mostly ionized. Possible sources of ionization are large-scale shocks or a putative hot component which confines the radio lobes. The high line-of-sight magnetic field strength (B-parallel to approximate to 0.3-1.3 mu G) deduced from the rotation measure (approximate to 20 rad m(-2)) and energy equipartition suggests that the cloud may have undergone significant turbulent heating from secondary shocks. The predicted bounds on the fraction of neutral material (10(-6)-10(-1)) indicates that this may be the first example of a spatially resolved, extragalactic ionized cloud. Such objects are thought to be responsible for some of the Ly alpha absorption lines observed in the spectra of quasars. C1 AUSTRALIA TELESCOPE NATL FACIL,EPPING,NSW 2121,AUSTRALIA. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94551. AUSTRALIAN NATL UNIV,MT STROMLO & SIDING SPRING OBSERV,WESTON,ACT 2611,AUSTRALIA. RP BLANDHAWTHORN, J (reprint author), ANGLO AUSTRALIAN OBSERV,POB 296,EPPING,NSW 2121,AUSTRALIA. OI Koekemoer, Anton/0000-0002-6610-2048 NR 20 TC 7 Z9 7 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 JUL 10 PY 1995 VL 447 IS 2 BP L77 EP L80 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RF790 UT WOS:A1995RF79000005 ER PT J AU MADER, KA ZUNGER, A AF MADER, KA ZUNGER, A TI LOCALIZATION AND BAND-GAP PINNING IN SEMICONDUCTOR SUPERLATTICES WITH LAYER THICKNESS FLUCTUATIONS SO EUROPHYSICS LETTERS LA English DT Article ID QUANTUM-WELLS; INTERFACES; STATES; PHOTOLUMINESCENCE AB We consider (AlAs)(n)/(GaAs)(n) superlattices with random thickness fluctuations Delta n around the nominal period n. Using three-dimensional pseudopotential plane-wave band theory, we show that i) any amount Delta n/n of thickness fluctuations leads to band edge wave function localization, ii) for small Delta n/n the SL band gap is pinned at the gap level produced by a single layer with <> thickness n + Delta n, iii) the bound states due to monolayer thickness fluctuations lead to significant band gap reductions, e.g., in n = 2, 4, 6, and 10 monolayer SLs the reductions are 166, 67, 29, and 14 meV for [111] SLs, and 133, 64, 36, and 27 meV for [001] SLs, iv) [001] AlAs/GaAs SLs with monolayer thickness fluctuations have a direct band gap, while the ideal [001] SLs are indirect for n < 4. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RI Zunger, Alex/A-6733-2013 NR 30 TC 9 Z9 9 U1 1 U2 2 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 JUL 10 PY 1995 VL 31 IS 2 BP 107 EP 112 DI 10.1209/0295-5075/31/2/008 PG 6 WC Physics, Multidisciplinary SC Physics GA RK365 UT WOS:A1995RK36500008 ER PT J AU JOHNSON, PA MCEVILLY, TV AF JOHNSON, PA MCEVILLY, TV TI PARKFIELD SEISMICITY - FLUID-DRIVEN SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SAN-ANDREAS FAULT; VELOCITY STRUCTURE; CALIFORNIA; STRESS; PRESSURE; MECHANICS; INVERSION; RUPTURE; WAVES; WATER AB Characteristics of microearthquake occurrence along the locked-to-creeping transition of the San Andreas fault at Parkfield in central California are reviewed for evidence that fault zone fluids play a critical role in slip dynamics there. Previous studies at Parkfield have defined a low-velocity, anisotropic, attenuating fault zone and a high Vp/Vs ratio in the nucleation zone of the repeating M 6 earthquakes. Most of the ongoing seismicity is organized into a temporally-evolving checkerboard pattern of alternating high and low seismic slip regions divided on the fault zone at 3-6 km spacings. Much of the seismicity is further confined to a few hundred small (20-30 m radius) cells of densely clustered microearthquakes that exhibit periodic recurrence. Space-time development of small (tens to hundreds of meters), transient (minutes to days) earthquake sequences reveals diffusivelike outward spreading along the fault zone. There is some evidence for anomalous source mechanisms in sequence-initiating events, possibly indicative of hydraulic fracturing. The data are consistent with a model in which some microearthquake clusters and confined sequences occur by the cyclic pressurization of fluid within localized patches of the fault zone. The consequent modulation of the effective normal stress leads to fluid-driven slip manifested both as the highly periodic earthquake clusters and as localized earthquake sequences observed at Parkfield. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR COMPUTAT SEISMOL, BERKELEY, CA USA. RP JOHNSON, PA (reprint author), UNIV CALIF BERKELEY, SEISMOG STN, 475 MCCONE HALL, BERKELEY, CA 94720 USA. NR 53 TC 75 Z9 78 U1 1 U2 4 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 JUL 10 PY 1995 VL 100 IS B7 BP 12937 EP 12950 DI 10.1029/95JB00474 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA RH812 UT WOS:A1995RH81200040 ER PT J AU HAY, BP RUSTAD, JR ZIPPERER, JP WESTER, DW AF HAY, BP RUSTAD, JR ZIPPERER, JP WESTER, DW TI CONFORMATIONAL-ANALYSIS OF CROWN-ETHERS .1. 12-CROWN-4 SO JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM LA English DT Article ID MOLECULAR MECHANICS; CRYSTAL-STRUCTURE; MACROCYCLE INTERACTION; KINETIC DATA; COMPLEXES; 1,4,7,10-TETRAOXACYCLODODECANE; COORDINATION; STABILITY; CATIONS; ALKALI AB An exhaustive conformational search of 12-crown-4 was performed with the MM3 program. The results of this search are discussed with respect to available experimental data. Conformers that have been observed in crystal structures are (i) found to be among the lowest energy conformers (within 2 kcal mol(-1) of the global minimum) and (ii) the structural features are well reproduced by the model. After correction for symmetry and mixing, relative free energies indicate that, in non-polar solvents, 12-crown-4 consists of a mixture of conformers with four conformers that account for over 90% of the total. The most highly populated conformer has not previously been reported. Comparison of MM3 results with those of ab initio SCF calculations show a good agreement with the relative order of conformer stability for the six lowest energy conformers. Comparison of MM3 results with those of other force field models (MM2, AMBER, and WBFF) reveals that conformational search results on 12-crown-4 are highly force field dependent and indicates that care is required both in the choice of a force field model and in the interpretation of the calculation results. RP PACIFIC NW LAB, MSIN, K9-77, POB 999, RICHLAND, WA 99352 USA. NR 35 TC 39 Z9 39 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 J MOL STRUC-THEOCHEM JI Theochem-J. Mol. Struct. PD JUL 10 PY 1995 VL 337 IS 1 BP 39 EP 47 DI 10.1016/0166-1280(94)04118-C PG 9 WC Chemistry, Physical SC Chemistry GA RH450 UT WOS:A1995RH45000006 ER PT J AU ICHINOSE, S AF ICHINOSE, S TI RENORMALIZATION OF 2-DIMENSIONAL R(2)-GRAVITY SO NUCLEAR PHYSICS B LA English DT Article ID 2-DIMENSIONAL QUANTUM-GRAVITY; RANDOM SURFACES; 2 DIMENSIONS; ARBITRARY DIMENSIONS; NONCRITICAL STRINGS; FIELD-THEORY; EXPONENTS; MODELS AB Two Dimensional Gravity with R(2)-term is quantized around the R(2)-Liouville solution in the semiclassical way. Renormalization, regularization (infra-red, ultra-violet) and a topological term (partial derivative(phi partial derivative phi)) are carefully treated, All (1-loop) divergences are renormalized by the cosmological constant (mu) and the R(2)-coupling-constant (beta) for the case beta > 0. The quantum meaning of the topological term is clarified. The renormalization group beta-functions of the couplings beta and mu are obtained, It is found that the theory is conformal (i.e. the beta-functions=0) for w = (beta/A) . (16 pi . 48 pi/(26 - c(m))) greater than or equal to 1 (where A is a fixed area) exactly when the coupling constant xi of the topological term takes the value of 1. As for 0 < w < 1, beta is asymptotically free for c(m) < 26 and mu is asymptotically non-free. C1 UNIV SHIZUOKA,DEPT PHYS,SHIZUOKA 422,JAPAN. RP ICHINOSE, S (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. RI Ichinose, Shoichi/E-8277-2013 NR 37 TC 6 Z9 6 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 JUL 10 PY 1995 VL 445 IS 2-3 BP 311 EP 326 DI 10.1016/0550-3213(95)00231-G PG 16 WC Physics, Particles & Fields SC Physics GA RK490 UT WOS:A1995RK49000006 ER PT J AU PHAIR, L TSO, K GHETTI, R WOZNIAK, GJ MORETTO, LG DESOUZA, RT BOWMAN, DR CARLIN, N GELBKE, CK GONG, WG KIM, YD LISA, MA LYNCH, WG PEASLEE, GF TSANG, MB ZHU, F AF PHAIR, L TSO, K GHETTI, R WOZNIAK, GJ MORETTO, LG DESOUZA, RT BOWMAN, DR CARLIN, N GELBKE, CK GONG, WG KIM, YD LISA, MA LYNCH, WG PEASLEE, GF TSANG, MB ZHU, F TI REDUCIBILITY AND THERMAL SCALING OF CHARGE-DISTRIBUTIONS IN MULTIFRAGMENTATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID MASS FRAGMENT EMISSION; PHASE-TRANSITION; NUCLEAR MULTIFRAGMENTATION; COLLISIONS; SIGNALS; MOMENTA; PROBE C1 MICHIGAN STATE UNIV,NATL SUPERCOND CYCLOTRON LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. RP PHAIR, L (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Carlin Filho, Nelson/C-2187-2012; Lynch, William/I-1447-2013; deSouza, Romualdo/P-5862-2015 OI Lynch, William/0000-0003-4503-176X; deSouza, Romualdo/0000-0001-5835-677X NR 16 TC 27 Z9 27 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 213 EP 216 DI 10.1103/PhysRevLett.75.213 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800007 ER PT J AU KRAICHNAN, RH YAKHOT, V CHEN, SY AF KRAICHNAN, RH YAKHOT, V CHEN, SY TI SCALING RELATIONS FOR A RANDOMLY ADVECTED PASSIVE SCALAR FIELD SO PHYSICAL REVIEW LETTERS LA English DT Article ID PROBABILITY C1 PRINCETON UNIV,PROGRAM APPL & COMPUTAT MATH,PRINCETON,NJ 08544. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RI Chen, Shiyi/A-3234-2010 NR 19 TC 90 Z9 92 U1 1 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 240 EP 243 DI 10.1103/PhysRevLett.75.240 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800014 ER PT J AU LABAUNE, C BALDIS, HA RENARD, N SCHIFANO, E BATON, SD MICHARD, A SEKA, W BAHR, RE BAUER, BS BAKER, K ESTABROOK, K AF LABAUNE, C BALDIS, HA RENARD, N SCHIFANO, E BATON, SD MICHARD, A SEKA, W BAHR, RE BAUER, BS BAKER, K ESTABROOK, K TI LARGE-AMPLITUDE ION-ACOUSTIC-WAVES IN A LASER-PRODUCED PLASMA SO PHYSICAL REVIEW LETTERS LA English DT Article ID STIMULATED BRILLOUIN-SCATTERING C1 UNIV ROCHESTER,LASER ENERGET LAB,ROCHESTER,NY 14627. UNIV CALIF DAVIS,PLASMA PHYS RES INST,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP LABAUNE, C (reprint author), ECOLE POLYTECH,UTILASAT LASERS INTENSES LAB,F-91128 PALAISEAU,FRANCE. NR 19 TC 21 Z9 21 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 248 EP 251 DI 10.1103/PhysRevLett.75.248 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800016 ER PT J AU PRICE, DF MORE, RM WALLING, RS GUETHLEIN, G SHEPHERD, RL STEWART, RE WHITE, WE AF PRICE, DF MORE, RM WALLING, RS GUETHLEIN, G SHEPHERD, RL STEWART, RE WHITE, WE TI ABSORPTION OF ULTRASHORT LASER-PULSES BY SOLID TARGETS HEATED RAPIDLY TO TEMPERATURES 1-1000 EV SO PHYSICAL REVIEW LETTERS LA English DT Article ID PLASMA; CONDUCTIVITY RP PRICE, DF (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 15 TC 249 Z9 254 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 252 EP 255 DI 10.1103/PhysRevLett.75.252 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800017 ER PT J AU JOHANSSON, B AHUJA, R ERIKSSON, O WILLS, JM AF JOHANSSON, B AHUJA, R ERIKSSON, O WILLS, JM TI ANOMALOUS FCC CRYSTAL-STRUCTURE OF THORIUM METAL SO PHYSICAL REVIEW LETTERS LA English DT Article ID BRILLOUIN-ZONE; SPECIAL POINTS; CERIUM; TRANSITION; ELEMENTS; SYSTEMS; BAND C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP JOHANSSON, B (reprint author), UPPSALA UNIV,CONDENSED MATTER THEORY GRP,BOX 530,S-75121 UPPSALA,SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 33 TC 26 Z9 26 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 280 EP 283 DI 10.1103/PhysRevLett.75.280 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800024 ER PT J AU DEAVEN, DM HO, KM AF DEAVEN, DM HO, KM TI MOLECULAR-GEOMETRY OPTIMIZATION WITH A GENETIC ALGORITHM SO PHYSICAL REVIEW LETTERS LA English DT Article ID CARBON CLUSTERS RP DEAVEN, DM (reprint author), US DOE,AMES LAB,DEPT PHYS,AMES,IA 50011, USA. NR 17 TC 623 Z9 650 U1 6 U2 77 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 JUL 10 PY 1995 VL 75 IS 2 BP 288 EP 291 DI 10.1103/PhysRevLett.75.288 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800026 ER PT J AU TRIVEDI, N RANDERIA, M AF TRIVEDI, N RANDERIA, M TI DEVIATIONS FROM FERMI-LIQUID BEHAVIOR ABOVE T-C IN 2D SHORT COHERENCE LENGTH SUPERCONDUCTORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID U HUBBARD-MODEL; PHASE-DIAGRAM; SPIN DYNAMICS; CROSSOVER; GAP RP TRIVEDI, N (reprint author), ARGONNE NATL LAB,DIV MAT SCI 223,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 24 TC 141 Z9 141 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 JUL 10 PY 1995 VL 75 IS 2 BP 312 EP 315 DI 10.1103/PhysRevLett.75.312 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800032 ER PT J AU FULLERTON, EE RIGGS, KT SOWERS, CH BADER, SD BERGER, A AF FULLERTON, EE RIGGS, KT SOWERS, CH BADER, SD BERGER, A TI SUPPRESSION OF BIQUADRATIC COUPLING IN FE/CR(001) SUPERLATTICES BELOW THE NEEL TRANSITION OF CR SO PHYSICAL REVIEW LETTERS LA English DT Article ID RESOLUTION MONTE-CARLO; GIANT MAGNETORESISTANCE; MAGNETIC SUPERLATTICES; CRITICAL-BEHAVIOR; THIN-FILMS; EXCHANGE; OSCILLATIONS; MULTILAYERS; FE(100); LAYERS C1 STETSON UNIV,DE LAND,FL 32720. UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717. UNIV CALIF IRVINE,INST SURFACE & INTERFACE SCI,IRVINE,CA 92717. RP FULLERTON, EE (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Bader, Samuel/A-2995-2013; Fullerton, Eric/H-8445-2013; Berger, Andreas/D-3706-2015 OI Fullerton, Eric/0000-0002-4725-9509; Berger, Andreas/0000-0001-5865-6609 NR 27 TC 113 Z9 113 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 10 PY 1995 VL 75 IS 2 BP 330 EP 333 DI 10.1103/PhysRevLett.75.330 PG 4 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800037 ER PT J AU ZUREK, WH PAZ, JP AF ZUREK, WH PAZ, JP TI DECOHERENCE, CHAOS, AND THE 2ND LAW - REPLY SO PHYSICAL REVIEW LETTERS LA English DT Note ID WAVE PACKET; QUANTUM RP ZUREK, WH (reprint author), LOS ALAMOS NATL LAB,POB 1663,T-6,MAIL STOP B288,LOS ALAMOS,NM 87545, USA. RI Paz, Juan/C-5947-2008 NR 11 TC 29 Z9 29 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 JUL 10 PY 1995 VL 75 IS 2 BP 351 EP 351 DI 10.1103/PhysRevLett.75.351 PG 1 WC Physics, Multidisciplinary SC Physics GA RG978 UT WOS:A1995RG97800043 ER PT J AU LEDERMAN, LM AF LEDERMAN, LM TI PUBLIC SCIENCE LITERACY MUST BE INCREASED TO STEM TIDE OF ANTI-SCIENCE SENTIMENT SO SCIENTIST LA English DT Editorial Material AB The new onslaught of anti-science sentiment stems in large part from a failure of the educational system to produce a science-literate public, contends Nobelist Leon M. Lederman, director emeritus of Fermi National Accelerator Laboratory. An informed population can dour the power of scientific knowledge to socially beneficial ends, Lederman says. C1 IIT,CHICAGO,IL 60616. RP LEDERMAN, LM (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU SCIENTIST INC PI PHILADELPHIA PA 3600 MARKET ST SUITE 450, PHILADELPHIA, PA 19104 SN 0890-3670 J9 SCIENTIST JI Scientist PD JUL 10 PY 1995 VL 9 IS 14 BP 13 EP 13 PG 1 WC Information Science & Library Science; Multidisciplinary Sciences SC Information Science & Library Science; Science & Technology - Other Topics GA RK415 UT WOS:A1995RK41500009 ER PT J AU BEDROSSIAN, P POELSEMA, B ROSENFELD, G JORRITSMA, LC LIPKIN, NN COMSA, G AF BEDROSSIAN, P POELSEMA, B ROSENFELD, G JORRITSMA, LC LIPKIN, NN COMSA, G TI ELECTRON-DENSITY CONTOUR SMOOTHENING FOR EPITAXIAL AG ISLANDS ON AG(100) SO SURFACE SCIENCE LA English DT Article DE ATOM-SOLID SCATTERING AND DIFFRACTION - ELASTIC; EPITAXY; LOW ENERGY ELECTRON DIFFRACTION (LEED); LOW INDEX SINGLE CRYSTAL SURFACES; SILVER; SURFACE STRUCTURE, MORPHOLOGY, ROUGHNESS, AND TOPOGRAPHY ID METAL-SURFACES; HE-SCATTERING; THERMAL HE; GROWTH; CU; DIFFRACTION; DIFFUSION; PT(111); PROFILE; CU(100) AB Rocking curves acquired with thermal energy He-atom scattering indicate that for small 2D Ag islands grown on Ag(100) at 200 K, the apparent step height normal to the surface is reduced by about 0.6 Angstrom compared to the step height calculated on the basis of bulk separation. For higher growth temperatures this effect is not observed. SPA-LEED measurements indicate that this behavior cannot be explained with a corresponding relaxation of island atoms. Rather, it may be attributed to a smoothening of the electronic corrugation (Smoluchowski effect), which is probed by the He atoms and which can be expected to occur for small and/or closely spaced islands. The dependence on the growth temperature indicates that this effect is, indeed, related to the size and proximity of the islands, being most pronounced for closely spaced islands consisting of a few tens of atoms only. These findings suggest that the difference between the morphology of the electron density contours, probed by methods which are sensitive to the density of valence electrons, such as atom scattering or scanning tunneling microscopy, and the morphology at the atomic core level is significant for small metal structures on metal surfaces. C1 KFA JULICH,FORSCHUNGSZENTRUM JULICH,INST GRENZFLACHENFORSCH & VAKUUMPHYS,D-52425 JULICH,GERMANY. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. UNIV TWENTE,FAC APPL PHYS,7500 AE ENSCHEDE,NETHERLANDS. NR 39 TC 36 Z9 36 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JUL 10 PY 1995 VL 334 IS 1-3 BP 1 EP 9 DI 10.1016/0039-6028(95)00434-3 PG 9 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RK973 UT WOS:A1995RK97300008 ER PT J AU STANNERS, CD CREMER, PS WILK, DE SHEN, YR SOMORJAI, GA AF STANNERS, CD CREMER, PS WILK, DE SHEN, YR SOMORJAI, GA TI GROWTH OF CU FILMS ON ADSORBATE-COVERED PT(111) SO SURFACE SCIENCE LA English DT Article ID ENERGY ELECTRON-DIFFRACTION; CRYSTAL-SURFACES; ADSORPTION; BENZENE; LEED; SPECTROSCOPY; CO/W(110); O/W(110); OXYGEN; CO AB The growth of copper films on Pt(111) covered with a monolayer of benzene coadsorbed with CO in a 2 root 3 X 5 structure was studied by temperature programmed desorption (TPD), high resolution electron energy loss spectroscopy (HREELS), low energy electron diffraction (LEED), and Auger electron spectroscopy (AES). When copper was deposited directly from a hot filament onto the GO-benzene monolayer, the copper displaced the monolayer and came into direct contact with Pt. However, when a spacer layer of benzene was condensed on top of the monolayer prior to copper deposition and then thermally removed after the Cu was deposited, it was found that Cu formed three-dimensional islands that partially displaced the CO-benzene overlayer. At high coverages of Cu, the overlayer was completely displaced by Cu which could then wet the Pt(111) surface. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CHEM,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT PHYS,DIV MAT SCI,BERKELEY,CA 94720. NR 13 TC 1 Z9 1 U1 1 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 JUL 10 PY 1995 VL 334 IS 1-3 BP 95 EP 104 DI 10.1016/0039-6028(95)00241-3 PG 10 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RK973 UT WOS:A1995RK97300016 ER PT J AU TOBIN, JG WADDILL, GD LI, H TONG, SY AF TOBIN, JG WADDILL, GD LI, H TONG, SY TI PHOTOELECTRON DIFFRACTION IMAGING OF A SURFACE ALLOY SO SURFACE SCIENCE LA English DT Article DE COMPUTER SIMULATIONS; PHOTOELECTRON DIFFRACTION; PHOTOELECTRON HOLOGRAPHY; SINGLE CRYSTAL EPITAXY ID SCANNING TUNNELING MICROSCOPY; ELECTRON-EMISSION HOLOGRAPHY; HIGH-ENERGY AUGER; STRUCTURAL DETERMINATION; MULTIPLE-SCATTERING; IMAGES; PHOTOEMISSION; AU/CU(001); PATTERNS; SPECTROSCOPY AB Photoelectron diffraction imaging (PDI) has been used to determine the surface structure of a surface alloy. Direct two-dimensional imaging of the surface plane has been achieved by Fourier transformation of experimental energy-dependent photoelectron diffraction (EDPD) data. This imaging method, based upon the Fourier transformation of diffraction oscillations with energy and a summation over angular contributions, can provide vectorial atomic positions with atomic resolution. A new rapid data collection mode is introduced and tested by comparison with previously developed modes of photoelectron diffraction. Surface structural sensitivity was confirmed by comparison with multiple-scattering simulations. The previously ambiguous surface geometry of c(2 x 2) Au/Cu(001) has been determined, with clear, non-model-dependent discrimination of the surface alloy over the overlayer structure. 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 68 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD JUL 10 PY 1995 VL 334 IS 1-3 BP 263 EP 275 DI 10.1016/0039-6028(95)00437-8 PG 13 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RK973 UT WOS:A1995RK97300030 ER PT J AU PIETRASS, T BIFONE, A PINES, A AF PIETRASS, T BIFONE, A PINES, A TI ADSORPTION PROPERTIES OF POROUS SILICON CHARACTERIZED BY OPTICALLY ENHANCED XE-129 NMR-SPECTROSCOPY SO SURFACE SCIENCE LA English DT Letter DE NUCLEAR MAGNETIC RESONANCE; PHYSICAL ADSORPTION; SURFACE STRUCTURE ID NUCLEAR MAGNETIC-RESONANCE; FRACTAL SURFACES; SPIN EXCHANGE; XENON; GAS; PHOTOLUMINESCENCE; LUMINESCENCE; SOLIDS; FIELD AB Highly spin polarized xenon is used to study the adsorption properties of porous silicon surfaces by Xe-129 NMR spectroscopy. The sensitivity enhancement through optical pumping allows the NMR characterization of small amounts of physisorbed xenon in a pressure regime typical for adsorption isotherms. Fully hydrogen terminated porous silicon, porous silicon with an increased number of dangling bonds and porous silicon after methanol adsorption are characterized by the adsorbed Xe-129 NMR lineshape, chemical shift and relaxation behavior. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP PIETRASS, T (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 33 TC 34 Z9 34 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 JUL 10 PY 1995 VL 334 IS 1-3 BP L730 EP L734 DI 10.1016/0039-6028(95)80024-7 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA RK973 UT WOS:A1995RK97300007 ER PT J AU BOO, DW LEE, YT AF BOO, DW LEE, YT TI INFRARED-SPECTROSCOPY OF THE SILICONIUM ION, SIH5+ SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC SPECTROSCOPY; SIH2+; PREDISSOCIATION; EXCHANGE; SPECTRUM; CATION; SIH3+ C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP BOO, DW (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 25 TC 22 Z9 22 U1 0 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 JUL 8 PY 1995 VL 103 IS 2 BP 514 EP 519 DI 10.1063/1.470137 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RH105 UT WOS:A1995RH10500004 ER PT J AU BOO, DW LEE, YT AF BOO, DW LEE, YT TI INFRARED-SPECTROSCOPY OF THE MOLECULAR-HYDROGEN SOLVATED CARBONIUM-IONS, CH5+(H-2)(N) (N=1-6) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GAS-PHASE; ELECTRONIC-STRUCTURE; ORBITAL THEORY; CH5+; CARBOCATIONS; STABILITIES; CH5+(CH4)N; ENERGIES C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP BOO, DW (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 34 TC 70 Z9 70 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 8 PY 1995 VL 103 IS 2 BP 520 EP 530 DI 10.1063/1.470138 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RH105 UT WOS:A1995RH10500005 ER PT J AU SHKROB, IA TRIFUNAC, AD AF SHKROB, IA TRIFUNAC, AD TI MAGNETIC-RESONANCE AND SPIN DYNAMICS RADICAL-ION PAIRS - PULSED TIME-RESOLVED FLUORESCENCE-DETECTED MAGNETIC-RESONANCE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRON-PARAMAGNETIC RESONANCE; EXCIPLEX SYSTEMS; ALKANE SOLUTIONS; QUANTUM BEATS; RADIOLYSIS; SPECTRA; CATIONS; LIQUID; KINETICS; SOLVENTS RP SHKROB, IA (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 39 TC 14 Z9 14 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD JUL 8 PY 1995 VL 103 IS 2 BP 551 EP 561 DI 10.1063/1.470141 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RH105 UT WOS:A1995RH10500008 ER PT J AU HARDIE, RW THAYER, GR BARRERAROLDAN, A AF HARDIE, RW THAYER, GR BARRERAROLDAN, A TI DEVELOPMENT OF A METHODOLOGY FOR EVALUATING AIR-POLLUTION OPTIONS FOR IMPROVING THE AIR-QUALITY IN MEXICO-CITY SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article; Proceedings Paper CT 3rd International Symposium on Transport and Air Pollution CY JUN 06-10, 1994 CL AVIGNON, FRANCE DE METHODOLOGY DEVELOPMENT; EVALUATION; AIR POLLUTION; AIR QUALITY; MEXICO CITY AB This paper describes a methodology for evaluating air pollution control strategies for Mexico City. The methodology combines Mixed Integer Linear Programming (MILP) and Multi-Attribute Decision Theory (MADT) to design, evaluate and rank groups of options (single actions) to combat air pollution, considering economic, technical, environmental, social, political and institutional factors. Groups of options or strategies are formed using MILP. These strategies are then evaluated and ranked utilizing MADT. As an example of the capabilities of this methodology, this paper presents the procedure to design strategies and the evaluation and ranking of three of these strategies. This methodology was designed to help authorities in the decision-making process for air pollution control, and was developed specifically for the Mexico City case, although the experience gained in this work can be used to develop similar methodologies for other metropolitan areas throughout the world. C1 INST MEXICANO PETR,GERENCIA CIENCIAS AMBIENTE,MEXICO CITY 07730,DF,MEXICO. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 5 TC 2 Z9 2 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0048-9697 J9 SCI TOTAL ENVIRON JI Sci. Total Environ. PD JUL 8 PY 1995 VL 169 IS 1-3 BP 295 EP 301 DI 10.1016/0048-9697(95)04661-J PG 7 WC Environmental Sciences SC Environmental Sciences & Ecology GA RM586 UT WOS:A1995RM58600035 ER PT J AU RODRIGUEZ, JA KUHN, M AF RODRIGUEZ, JA KUHN, M TI ELECTRONIC-PROPERTIES OF PT IN BIMETALLIC SYSTEMS - PHOTOEMISSION AND MOLECULAR-ORBITAL STUDIES FOR PT-AL SURFACE ALLOYS SO CHEMICAL PHYSICS LETTERS LA English DT Article ID X-RAY; CO; CHEMISORPTION; PLATINUM; ADSORPTION; INTERFACE; TA(110); SHIFTS; AU AB The adsorption of Pt on polycrystalline Al leads to the formation of surface alloys. The electronic properties of these systems have been examined using XPS and ab initio SCF calculations. The Pt-Al surface alloys display a Pt(5d) band that appears at much higher binding energy (approximate to 1.8 eV) than in metallic Pt. This is accompanied by positive shifts in the Pt 4f (approximate to 1.2 eV) and Al 2s (approximate to 0.2 eV) levels. The Pt-Al bond is complex, involving an Al(3s, 3p) --> Pt(6s, 6p) charge transfer and a Pt(5d) --> Pt(6s, 6p) rehybridization that localize electrons in the region between the two metal centers. RP RODRIGUEZ, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 37 TC 23 Z9 23 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 JUL 7 PY 1995 VL 240 IS 5-6 BP 435 EP 441 DI 10.1016/0009-2614(95)00550-N PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RH749 UT WOS:A1995RH74900007 ER PT J AU BAER, BJ CROWELL, RA CHRONISTER, EL AF BAER, BJ CROWELL, RA CHRONISTER, EL TI HIGH-PRESSURE LOW-TEMPERATURE OPTICAL DEPHASING OF RHODAMINE-101 IN PMMA (VOL 237, PG 380, 1995) SO CHEMICAL PHYSICS LETTERS LA English DT Correction C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 1 TC 1 Z9 1 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 JUL 7 PY 1995 VL 240 IS 5-6 BP 634 EP 634 DI 10.1016/0009-2614(95)00610-G PG 1 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RH749 UT WOS:A1995RH74900040 ER PT J AU DOU, Y ADMIRAAL, SJ IKEDASAITO, M KRZYWDA, S WILKINSON, AJ LI, TS OLSON, JS PRINCE, RC PICKERING, IJ GEORGE, GN AF DOU, Y ADMIRAAL, SJ IKEDASAITO, M KRZYWDA, S WILKINSON, AJ LI, TS OLSON, JS PRINCE, RC PICKERING, IJ GEORGE, GN TI ALTERATION OF AXIAL COORDINATION BY PROTEIN ENGINEERING IN MYOGLOBIN - BISIMIDAZOLE LIGATION IN THE HIS(64)-]VAL/VAL(68)-]HIS DOUBLE MUTANT SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID SPERM WHALE MYOGLOBIN; SITE-DIRECTED MUTAGENESIS; ELECTRON-PARAMAGNETIC-RES; ABSORPTION FINE-STRUCTURE; DISTAL HISTIDINE MUTANTS; LIGAND-BINDING; INFRARED-SPECTROSCOPY; ESCHERICHIA-COLI; POCKET POLARITY; CARBON-MONOXIDE AB Pig and human myoglobin have been engineered to reverse the positions of the distal histidine and valine (i.e. His(64)(E7) --> Val and Val(68)(E11) --> His). Spectroscopic and ligand binding properties have been measured for human and pig H64V/V68H myoglobin, and the structure of the pig H64V/V68H double mutant has been determined to 2.07-Angstrom resolution by x-ray crystallography. The crystal structure shows that the N-epsilon of His(68) is located 2.3 Angstrom away from the heme iron, resulting in the formation of a hexacoordinate species, The imidazole plane of His(68) is tilted relative to the heme normal; moreover it is not parallel to that of His(93), in agreement with our previous proposal (Qin, J,, La Mar, G. N., Dou, Y,, Admiraal, S. J., and Ikeda-Saito, M. (1994) J. Biol. Chem. 269, 1083-1090). At cryogenic temperatures, the heme iron is in a low spin state, which exhibits a highly anisotropic EPR spectrum (g(1) = 3.34, g(2) = 2.0, and g(3) < 1), quite different from that of the imidazole complex of metmyoglobin. The mean iron-nitrogen distance is 2.01 Angstrom for the low spin ferric state as determined by x-ray spectroscopy, The ferrous form of H64V/V68H myoglobin shows an optical spectrum that is similar to that of b-type cytochromes and consistent with the hexacoordinate bisimidazole hemin structure determined by the x-ray crystallography, The double mutation lowers the ferric/ferrous couple midpoint potential from +54 mV of the wild-type protein to -128 mV. Ferrous H64V/V68H myoglobin binds CO and NO to form stable complexes, but its reaction with O-2 results in a rapid autooxidation to the ferric species. All of these results demonstrate that the three-dimensional positions of His(64) and Val(68) in the wild-type myoglobin are as important as the chemical nature of the side chains in facilitating reversible O-2 binding and inhibiting autooxidation. C1 UNIV YORK,DEPT CHEM,YORK YO1 5DD,N YORKSHIRE,ENGLAND. ADAM MICKIEWICZ UNIV POZNAN,FAC CHEM,DEPT CRYSTALLOG,PL-60720 POZNAN,POLAND. RICE UNIV,DEPT BIOCHEM & CELL BIOL,HOUSTON,TX 77251. RICE UNIV,WM KECK CTR COMP BIOL,HOUSTON,TX 77251. EXXON RES & ENGN CO,ANNANDALE,NJ 08801. STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA. RP DOU, Y (reprint author), CASE WESTERN RESERVE UNIV,SCH MED,DEPT PHYSIOL & BIOPHYS,CLEVELAND,OH 44106, USA. RI Ikeda-Saito, Masao/A-5992-2008; George, Graham/E-3290-2013; Pickering, Ingrid/A-4547-2013; Ikeda-Saito, Masao/K-2703-2015; OI Olson, John/0000-0002-0760-5403; Pickering, Ingrid/0000-0002-0936-2994; Wilkinson, Anthony/0000-0003-4577-9479 FU NHLBI NIH HHS [HL 47020]; NIGMS NIH HHS [GM 35649, GM 51588] NR 57 TC 58 Z9 58 U1 0 U2 8 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 JUL 7 PY 1995 VL 270 IS 27 BP 15993 EP 16001 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH226 UT WOS:A1995RH22600019 PM 7608158 ER PT J AU WU, ZN JOHNSON, KW GOLDSTEIN, B CHOI, Y EATON, SF LAUE, TM CIARDELLI, TL AF WU, ZN JOHNSON, KW GOLDSTEIN, B CHOI, Y EATON, SF LAUE, TM CIARDELLI, TL TI SOLUTION ASSEMBLY OF A SOLUBLE, HETEROMERIC, HIGH-AFFINITY INTERLEUKIN-2 RECEPTOR COMPLEX SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID HELICAL COILED-COILS; GAMMA-CHAIN; FUNCTIONAL CONSEQUENCES; LEUCINE ZIPPERS; AMINO-ACIDS; EXPRESSION; STABILITY; PROTEINS; ANTIBODY; BINDING AB In this study, we report the use of coiled-coil (leucine zipper) molecular recognition for the solution assembly of stable, high affinity, heteromeric interleukin-2 receptor complexes, Co-expression of interleukin-2 receptor alpha and beta extracellular domains (ectodomains), each fused to seven coiled-coil heptad repeats, resulted in the formation of heteromeric complexes that bound interleukin-2 in a cooperative fashion and with much higher affinity than similar homomeric complexes, The dissociation constants for these solution complexes are within the range of values reported for the comparable cell surface ''pseudo high affinity'' interleukin-2 receptor. Ligand-induced cross-linking of homomeric or heteromeric receptor subunits is the common signal transmission mechanism employed by hematopoietin receptors. Individual receptor ectodomains, however, often do not bind ligand with measurable affinity, This is the first study to demonstrate the feasibility of coiled coil mediated preassembly of cytokine receptor complexes. C1 DARTMOUTH COLL,SCH MED,DEPT PHARMACOL & TOXICOL,HANOVER,NH 03755. VET ADM MED CTR,WHITE RIVER JCT,VT 05009. CHIRON CORP,EMERYVILLE,CA 94608. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV NEW HAMPSHIRE,DEPT BIOCHEM,DURHAM,NH 03824. FU NIAID NIH HHS [AI34331]; NIGMS NIH HHS [GM35556] NR 35 TC 23 Z9 23 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 JUL 7 PY 1995 VL 270 IS 27 BP 16039 EP 16044 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH226 UT WOS:A1995RH22600026 PM 7608165 ER PT J AU STEVENS, A POOLE, TL AF STEVENS, A POOLE, TL TI 5'-EXONUCLEASE-2 OF SACCHAROMYCES-CEREVISIAE - PURIFICATION AND FEATURES OF RIBONUCLEASE ACTIVITY WITH COMPARISON TO 5'-EXONUCLEASE-1 SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID LACKING 5'->3' EXORIBONUCLEASE-1; MESSENGER-RNA; SUBSTRATE-SPECIFICITY; CYTOPLASMIC EXTRACTS; ASCITES-CELLS; YEAST-CELLS; GENE; PROTEIN; CLEAVAGE; XRN1 AB 5'-Exonuclease-2 has been purified 17,000-fold from whole cell extracts of Saccharomyces cerevisiae. A 116-kDa polypeptide parallels the enzyme activity when the purified protein is examined by polyacrylamide gel electrophoresis in sodium dodecyl sulfate. Amino terminal sequencing of the 116-kDa protein shows that the sequence agrees with that encoded by the HKE1 gene, previously reported to encode exonuclease-2. A 45-kDa polypeptide also parallels the enzyme activity upon purification, and Sephacryl S-200 molecular sieve chromatography of the purified enzyme shows a parallel elution of most of the 116- and 45-kDa polypeptides, suggesting a close association of the two. Enzyme instability has precluded a more detailed analysis of their associative properties. The enzyme hydrolyzes RNA substrates to 5'-mononucleotides in a processive manner. Measurements of its substrate specificity and mode of action are compared with 5'-exonuclease-1. Restriction cut single-stranded T7 DNA is hydrolyzed at approximately 5-7% of the rate of 18 S rRNA of yeast by both enzymes. That 5'-exonuclease-2 hydrolyzes in a processive manner and lacks endonuclease activity is shown by the finding that [5'-P-32]GMP is the only product of its hydrolysis of [alpha-P-32]GTP-labeled synthetic RNAs. That 5'-exonuclease-2 hydrolyzes by a 5' --> 3' mode is shown by: 1) its poor hydrolysis of both 5'-capped and triphosphate-ended RNA substrates; 2) the products of its hydrolysis of [5'-P-32,H-3](pA)(4); and 3) the accumulation of 3'-stall fragments when a strong artificial RNA secondary structure is present in synthetic RNAs. 5'-Exonuclease-1 hydrolyzes the synthetic RNAs and (pA)(4) in an identical manner. RP STEVENS, A (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 28 TC 78 Z9 79 U1 0 U2 2 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 JUL 7 PY 1995 VL 270 IS 27 BP 16063 EP 16069 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH226 UT WOS:A1995RH22600030 PM 7608167 ER PT J AU WOLF, A SHAW, EW OH, BH DEBONDT, H JOSHI, AK AMES, GFL AF WOLF, A SHAW, EW OH, BH DEBONDT, H JOSHI, AK AMES, GFL TI STRUCTURE-FUNCTION ANALYSIS OF THE PERIPLASMIC HISTIDINE-BINDING PROTEIN - MUTATIONS DECREASING LIGAND BINDING ALTER THE PROPERTIES OF THE CONFORMATIONAL CHANGE AND OF THE CLOSED FORM SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID X-RAY STRUCTURE; SALMONELLA-TYPHIMURIUM; ESCHERICHIA-COLI; TRANSPORT-SYSTEMS; MALTOSE TRANSPORT; RHODOBACTER-CAPSULATUS; DEPENDENT TRANSPORT; MEMBRANE-VESICLES; ARGININE-BINDING; ACTIVE-TRANSPORT AB The periplasmic histidine-binding protein, HisJ, is a receptor for the histidine permease of Salmonella typhimurium. Receptors of this type are composed of two lobes that are far apart in the unliganded structure (open conformation) and drawn close together in the liganded structure (closed conformation), The binding of the ligand, in a cleft between the lobes, stabilizes the closed conformation. Such receptors have several functions in transport: interaction with the membrane-bound complex, transmission of a transmembrane signal to hydrolyze ATP, and receiving a signal to open the lobes and release the ligand. In this study the mechanism of action of HisJ was further investigated using mutant proteins defective in ligand binding activity and closed form-specific monoclonal antibodies (Wolf, A., Shaw, E. W., Nikaido, K., and Ames G. F.-L. (1994) J. Biol. Chem. 269, 23051-23058). Y14H is defective in stabilization of the closed form, does not assume the closed empty form, and assumes an altered closed liganded form. T121A and G119R are similar to Y14H, but assume a normal closed Liganded form. S72P binds the ligand to the open form, but does not assume a recognizable closed form. S92F is defective in the ability to undergo conformational change and to stabilize the closed form. Ad other mutant proteins appear to fall within one of these four categories. The biochemical characterization of these mutant proteins agrees with the structural analysis of the protein. We suggest that mutant proteins that do not assume the normal closed form, in addition to their defect in ligand binding, fail to interact with the membrane-bound complex and/or to transmit transmembrane signals. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT CHEM & STRUCT BIOL,BERKELEY,CA 94720. POHANG UNIV SCI & TECHNOL,DEPT LIFE SCI,KYUNGBUK 790784,SOUTH KOREA. RI Oh, Byung-Ha/C-2061-2011 FU NIAID NIH HHS [AI30725]; NIDDK NIH HHS [DK12121] NR 58 TC 25 Z9 25 U1 0 U2 2 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 JUL 7 PY 1995 VL 270 IS 27 BP 16097 EP 16106 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH226 UT WOS:A1995RH22600035 PM 7608172 ER PT J AU DUMONT, PJ FRITZ, JS SCHMIDT, LW AF DUMONT, PJ FRITZ, JS SCHMIDT, LW TI CATION-EXCHANGE CHROMATOGRAPHY IN NONAQUEOUS SOLVENTS SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 7th International Ion Chromatography Symposium (IICS 94) CY SEP 19-22, 1994 CL TURIN, ITALY ID ORGANIC CATIONS; ION-EXCHANGE; RESINS AB Much of the selectivity of organic ions in conventional ion chromatography comes from hydrophobic interaction between the carbon chain of the analyte ions and the polymer matrix of the ion exchanger. By operating in organic solvents containing little, if any, water, the true ion-exchange selectivity of various organic ions can be measured. Retention factors (capacity factors, k') for a series of protonated amine cations were measured in methanol, ethanol, 2-propanol and acetonitrile using a polymeric cation-exchange resin, conductivity detection, and eluents of methanesulfonic acid in the same organic solvent. Plots of log t(R)' vs. log methanesulfonic acid concentration were linear with slopes close to the theoretical slope of -1.0 except for acetonitrile where the slopes averaged -0.82. The retention factor showed little change with increasing carbon chain length in n-alkylamine cations, but increased substantially at fixed eluent concentration in going from methanol, to ethanol, to 2-propanol and especially to acetonitrile. Several practical separations of organic amine cations were demonstrated in non-aqueous media. One advantage of this technique is that neutral organic analytes elute very quickly in non-aqueous media and thus do not interfere with chromatographic separations of the ions. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 10 TC 13 Z9 13 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD JUL 7 PY 1995 VL 706 IS 1-2 BP 109 EP 114 DI 10.1016/0021-9673(94)01150-D PG 6 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RK714 UT WOS:A1995RK71400015 ER PT J AU DUMONT, PJ FRITZ, JS AF DUMONT, PJ FRITZ, JS TI ION-CHROMATOGRAPHIC SEPARATION OF ALKALI-METALS IN ORGANIC-SOLVENTS SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 7th International Ion Chromatography Symposium (IICS 94) CY SEP 19-22, 1994 CL TURIN, ITALY ID RESINS AB Ion-exchange chromatography is a common method for the separation and determination of metal cations. Although much research has been done on improving various aspects of this technique, the use of non-aqueous eluents has received little attention. The effect of organic solvents on the retention of alkali-metal cations on a macroporous polystyrene-divinylbenzene resin was studied. The retention of alkali cations increases as the organic content in the eluent increases for most organic solvents. Methanol was an exception with a maximum retention occurring at an eluent composition of methanol-water (75:25). Since organic solvents do not solvate these cations in the same manner as water, increases in the separation factors and changes in elution order are observed, Several separations that are not possible with aqueous eluents will be shown. The effect of crown ethers in the mobile phase was also investigated. In most solvents 18-crown-6 (18C6) altered the retention of all cations. In some cases 18C6 changed elution order or improved peak shape. Separations with an organic eluent and 18C6 modifier will also be shown. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP DUMONT, PJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 18 TC 21 Z9 21 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD JUL 7 PY 1995 VL 706 IS 1-2 BP 149 EP 158 DI 10.1016/0021-9673(94)01119-Y PG 10 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RK714 UT WOS:A1995RK71400021 ER PT J AU TANAKA, K OHTA, K FRITZ, JS LEE, YS SHIM, SB AF TANAKA, K OHTA, K FRITZ, JS LEE, YS SHIM, SB TI ION-EXCLUSION CHROMATOGRAPHY WITH CONDUCTIMETRIC DETECTION OF ALIPHATIC CARBOXYLIC-ACIDS ON AN H+-FORM CATION-EXCHANGE RESIN COLUMN BY ELUTION WITH POLYOLS AND SUGARS SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 7th International Ion Chromatography Symposium (IICS 94) CY SEP 19-22, 1994 CL TURIN, ITALY ID LIQUID-CHROMATOGRAPHY; SEPARATION AB The Ion-exclusion chromatography (IEC) of normal aliphatic carboxylic acids of different acidity (pK(a)) and hydrophobicity was investigated on a poly(styrene-divinylbenzene) (PS-DVB)-based strongly acidic cation-exchange resin column in the H+ form and conductimetric detection. When water was used as the eluent, although the C-1-C-5 carboxylic acids were separated from strong acid (HCl) depending on the pK(a) and the hydrophobicity, the resolution was low and the peaks were accompanied by leading depending on their hydrophobicities. To improve the peak shape and the peak resolution, aqueous eluents of polyols and sugars containing 1-8 alcoholic OH groups (methanol, ethylene glycol, glycerol, erythritol, xylitol, fructose, sorbitol, and sucrose) were tested for the IEC separation of the carboxylic acids. When aqueous eluents of polyols and sugars were used, the tendency for leading peaks was decreased drastically with increasing number of OH groups in the polyols and sugars. This is due mainly to the increase in the the hydrophilicity of the PS-DVB surface by the OH groups. An aqueous eluent of 10% methanol-0.15 M sucrose gave a reasonable resolution and highly sensitive detection for carboxylic acids. This eluent has a much lower background conductivity (ca. 4 mu S cm(-1)) and much higher detection sensitivity (ca. 170 times higher for valeric acid) than the 0.5 mM sulfuric acid (ca. 390 mu S cm(-1)) commonly used as an eluent in conventional IEC with conductimetric detection. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. CHUNG BUK NATL UNIV,CTR WATER RESOURCES & QUAL MANAGEMENT,CHONGJU 360763,SOUTH KOREA. CHUNG BUK NATL UNIV,DEPT CIVIL ENGN,CHONGJU 360763,SOUTH KOREA. RP TANAKA, K (reprint author), NATL IND RES INST NAGOYA,KITA KU,1-1 HIRATE CHO,NAGOYA,AICHI 462,JAPAN. NR 11 TC 39 Z9 39 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0021-9673 J9 J CHROMATOGR A JI J. Chromatogr. A PD JUL 7 PY 1995 VL 706 IS 1-2 BP 385 EP 393 DI 10.1016/0021-9673(95)00041-K PG 9 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RK714 UT WOS:A1995RK71400051 ER PT J AU CHANG, HT YEUNG, ES AF CHANG, HT YEUNG, ES TI POLY(ETHYLENEOXIDE) FOR HIGH-RESOLUTION AND HIGH-SPEED SEPARATION OF DNA BY CAPILLARY ELECTROPHORESIS SO JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES LA English DT Article; Proceedings Paper CT 5th Annual Frederick Conference on Capillary Electrophoresis CY OCT 25-26, 1994 CL FREDERICK, MD ID GRADIENT GEL-ELECTROPHORESIS; INDUCED FLUORESCENCE DETECTION; ENTANGLED POLYMER-SOLUTIONS; BASE-PAIR SUBSTITUTIONS; ZONE ELECTROPHORESIS; RESTRICTION FRAGMENTS; HUMAN GENOME; PH GRADIENT; REPTATION; SEQUENCE AB Capillary electrophoresis (CE) with polyacrylamide gels has already been demonstrated to allow single-base resolution of single-stranded DNA. However, linear polyacrylamide is not an ideal matrix because of a high viscosity and difficulties in preparing the polymer with well defined pore sizes. Alternatively, poly(ethyleneoxide) (PEG) with a large range of molecular masses from 300 000 to 8 000 000 is available commercially. In addition, it is easy to prepare homogeneous solutions to provide highly reproducible separation performance with sufficient resolution. Single-base resolution of double-stranded DNA between 123 and 124 base pairs can be achieved by the use of homogeneous matrices prepared from PEO (2.5% M(r) 8 000 000), and even better resolution is achieved by using mixed polymer matrices. With further work, it should be possible to change the fractions and the total amounts of polymers to achieve even higher resolution for different samples with different size ranges of fragments. Another advantage of mixed polymer matrices is that relatively high resolution can be obtained while maintaining a relatively low viscosity compared to linear polyacrylamide with identical contents of formamide and urea, which makes it easier to fill these matrices into small capillaries. C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. RI Chang, Huan-Tsung/C-1183-2011; OI Chang, Huan-Tsung/0000-0002-5393-1410 NR 45 TC 110 Z9 114 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-0232 EI 1873-376X J9 J CHROMATOGR B JI J. Chromatogr. B PD JUL 7 PY 1995 VL 669 IS 1 BP 113 EP 123 DI 10.1016/0378-4347(95)00044-J PG 11 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RK530 UT WOS:A1995RK53000014 PM 7581875 ER PT J AU XU, J KULLGREN, B DURBIN, PW RAYMOND, KN AF XU, J KULLGREN, B DURBIN, PW RAYMOND, KN TI SPECIFIC SEQUESTERING AGENTS FOR THE ACTINIDES .28. SYNTHESIS AND INITIAL EVALUATION OF MULTIDENTATE 4-CARBAMOYL-3-HYDROXY-1-METHYL-2(1H)-PYRIDINONE LIGANDS FOR IN-VIVO PLUTONIUM(IV) CHELATION SO JOURNAL OF MEDICINAL CHEMISTRY LA English DT Article ID PU-238; MICE; 3,4,3-LIHOPO; IRON(III); COMPLEXES; REMOVAL; DTPA; RAT; 3,4,3-LICAM(C); ENTEROBACTIN AB A new family of chelating agents based on 4-(substituted-carbamoyl)-3-hydroxy-2-pyridinones is reported. These have optional terminal substituents on the nitrogens, and the hydroxypyridonate (HOPO) rings are attached to molecular backbones through amide linkages. A very important feature of the methyl-substituted ligand derivatives (Me-3,2-HOPOs) is that, similarly to the catechoylamide complexes of the siderophore enterobactin and its analogs, these HOPO derivatives form strong hydrogen bonds between the amide proton and the adjacent oxygen of the phenolate in the metal complex; this enhances the stability of the complex. This rigidity helps to explain the great affinity of the Me-3,2-HOPO ligands for plutonium(IV), as observed here under physiological conditions. All 13 compounds studied significantly enhanced Pu excretion from mice compared with Pu-injected controls. Eight of the Ligands studied promoted significantly more Pu excretion than an equal molar amount of CaNa3-DTPA (the compound in present clinical use). Five injected and two orally administered Me-3,2-HOPO ligands promoted as much or slightly more Pu excretion than an equal molar amount of the octadentate 3,4,3-LI(1,2-HOPO), the previously most effective in vivo ligand. Surprisingly, although plutonium has an eight-coordination requirement, tetra and hexadentate Me-3,2-HOPO ligands were essentially as effective as the one octadentate ligand studied. These observations suggest that even the tetradentate Me-3,2-HOPO ligands compete with mammalian transferrin for Pu(IV). For the three most promising compounds, there is no acute toxicity seen up to the highest dose administered, which was 1000 mu mol/kg. One compound, the hexadentate TREN-(Me-3,2-HOPO), is particularly effective, either injected or orally, and an exceptionally good in vivo chelator of several actinides in addition to Pu(IV). Three of these compounds studied have low toxicity and are relatively simple and inexpensive to prepare. They are promising therapeutic agents. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. FU NIEHS NIH HHS [ES02698] NR 42 TC 87 Z9 88 U1 3 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-2623 J9 J MED CHEM JI J. Med. Chem. PD JUL 7 PY 1995 VL 38 IS 14 BP 2606 EP 2614 DI 10.1021/jm00014a013 PG 9 WC Chemistry, Medicinal SC Pharmacology & Pharmacy GA RJ014 UT WOS:A1995RJ01400013 PM 7629800 ER PT J AU SABELNIKOV, AG GREENBERG, B LACKS, SA AF SABELNIKOV, AG GREENBERG, B LACKS, SA TI AN EXTENDED -10-PROMOTER ALONE DIRECTS TRANSCRIPTION OF THE DPNII OPERON OF STREPTOCOCCUS-PNEUMONIAE SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE MESSENGER RNA; RIBOSOME-BINDING SITE; DNA METHYLASE; RESTRICTION-MODIFICATION SYSTEM; GRAM-POSITIVE BACTERIA ID ESCHERICHIA-COLI SIGMA-70; NUCLEOTIDE-SEQUENCE; DNA METHYLASE; SACCHAROMYCES-CEREVISIAE; GENETIC-TRANSFORMATION; SALMONELLA-TYPHIMURIUM; RECOMBINANT PLASMIDS; MISMATCH REPAIR; MESSENGER-RNA; CLONING AB The genetic cassette encoding the DpnII restriction-modification system of Streptococcus pneumoniae gave transcription products of approximately 2.7 and 1.8 kilobases. The larger, mRNA1, covered bath of the methylase genes, dpnM and dpnA, and the endonuclease gene dpnB; the smaller, mRNA2, covered only the dpnA and dpnB genes. Transcription of mRNA1 was shown to begin at the translation start site for dpnM, thereby producing an mRNA without any apparent ribosome-binding site for translation of the DpnM methylase. The promoter far mRNA1 was shown by base substitution and deletion analysis to consist of an extended -10 site, TaTGgTATAAT, with no required -35 site. A possible promoter further upstream with close matches to a -35 site and a nonextended -10 site was not used. A survey of 36 proven and putative promoters used by S. pneumoniae revealed that 61% of them contained the full -10 extension, although, other than the dpnM promoter, they matched at a -35 site, as well. It appears that, unlike those found in Escherichia coli, S. pneumoniae promoters frequently require an extended -10 site, and such a site can function naturally without a -35 site. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FU NIGMS NIH HHS [GM29721] NR 63 TC 115 Z9 115 U1 0 U2 2 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD JUL 7 PY 1995 VL 250 IS 2 BP 144 EP 155 DI 10.1006/jmbi.1995.0366 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH439 UT WOS:A1995RH43900005 PM 7541838 ER PT J AU ZHANG, X STUDIER, FW AF ZHANG, X STUDIER, FW TI ISOLATION OF TRANSCRIPTIONALLY ACTIVE MUTANTS OF T7 RNA-POLYMERASE THAT DO NOT SUPPORT PHAGE-GROWTH SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE T7 RNA POLYMERASE; T7 LYSOZYME; MUTANTS; REPLICATION; PACKAGING ID BACTERIOPHAGE T7; ESCHERICHIA-COLI; NUCLEOTIDE-SEQUENCE; EXPRESSION SYSTEM; T7-RNA POLYMERASE; DNA-REPLICATION; LATE PROMOTERS; PROCESSIVITY; INITIATION; GENES AB Mutants of bacteriophage T7 RNA polymerase defective in functions other than transcription were sought by random chemical mutagenesis of the cloned gene and selection for inability to support the growth of a T7 mutant whose growth is dependent on T7 RNA polymerase supplied by the host cell. About half of the mutant clones appeared unable to make full-length T7 RNA polymerase, many of them producing a truncated protein. Among 116 mutants expressing full-length protein, two-thirds were severely impaired in transcription, but a surprisingly high one-third were able to direct significant transcription in vivo. Both types of mutation were distributed across much of the gene, as determined by a rapid genetic mapping procedure that allows the lethal mutation in each clone to be localized. One mutation (isolated twice) allowed normal gene expression but prevented the formation of mature ends of T7 DNA from concatemers, which normally happens during packaging into phage particles. Thirty-seven of the mutations appeared to increase the sensitivity of the polymerase to inhibition by T7 lysozyme; all were suppressed by mutations in the lysozyme gene, including one suppressor constructed to retain full amidase activity but to be unable to bind T7 RNA polymerase. The two lysozyme-hypersensitive polymerase mutants analyzed in detail showed premature cessation of transcription during infection. Early proteins and those late proteins specified by genes as far right in T7 DNA as genes 8-9 appeared to be produced normally, but expression of genes farther to the right was strongly depressed. DNA replication was depressed about 50% in one of these mutants and 90% in the other, even though the T7 replication proteins were made in normal amounts at the normal time. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FU NIGMS NIH HHS [GM21872] NR 54 TC 28 Z9 28 U1 2 U2 5 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD JUL 7 PY 1995 VL 250 IS 2 BP 156 EP 168 DI 10.1006/jmbi.1995.0367 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH439 UT WOS:A1995RH43900006 PM 7608967 ER PT J AU SCHLUETER, JA WILLIAMS, JM GEISER, U DUDEK, JD SIRCHIO, SA KELLY, ME GREGAR, JS KWOK, WH FENDRICH, JA SCHIRBER, JE BAYLESS, WR NAUMANN, D ROY, T AF SCHLUETER, JA WILLIAMS, JM GEISER, U DUDEK, JD SIRCHIO, SA KELLY, ME GREGAR, JS KWOK, WH FENDRICH, JA SCHIRBER, JE BAYLESS, WR NAUMANN, D ROY, T TI SYNTHESIS AND CHARACTERIZATION OF 2 NEW ORGANIC SUPERCONDUCTORS, KAPPA-L-[BIS(ETHYLENEDISULFANYL)TETRATHIAFULVALENE]AU-2(CF3)(4)CENTER-DO T(1,1,2-TRICHLOROETHANE) AND KAPPA-H-[BIS(ETHYLENEDISULFANYL)TETRATHIAFULVALENE]AU-2(CF3)(4)CENTER-DO T(1,1,2-TRICHLOROETHANE) VIA MICROELECTROCRYSTALLIZATION SO JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS LA English DT Article ID PRESSURE AB A novel microelectrocrystallization (MEC) procedure (ten-fold decrease in halogenated solvent-use, micromolar quantities of electron donor molecule and supporting electrolyte, and Hg free electrodes), necessitated by the very small available quantities of the novel organometallic AU(CF3)(4)- anion, has been developed to prepare two distinct phases of kappa-(ET)(2)Au(CF3)(4) .(TCE) [ET = bis(ethylenedisulfanyl)tetrathiafulvalene, TCE = 1,1,2-trichloroethane] which exhibit ambient pressure superconductivity with onset temperature of 2.1 and 10.5 K. C1 ARGONNE NATL LAB,DIV SCI MAT,ARGONNE,IL 60439. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV COLOGNE,INST ANORGAN CHEM,D-50939 COLOGNE,GERMANY. RP SCHLUETER, JA (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 15 TC 32 Z9 32 U1 1 U2 1 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0022-4936 J9 J CHEM SOC CHEM COMM JI J. Chem. Soc.-Chem. Commun. PD JUL 7 PY 1995 IS 13 BP 1311 EP 1312 DI 10.1039/c39950001311 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA RG552 UT WOS:A1995RG55200001 ER PT J AU MEHR, R GLOBERSON, A PERELSON, AS AF MEHR, R GLOBERSON, A PERELSON, AS TI MODELING POSITIVE AND NEGATIVE SELECTION AND DIFFERENTIATION PROCESSES IN THE THYMUS SO JOURNAL OF THEORETICAL BIOLOGY LA English DT Article ID T-CELL-RECEPTOR; MAJOR HISTOCOMPATIBILITY COMPLEX; TRANSGENIC MICE; IMMATURE THYMOCYTES; CD4+8+ THYMOCYTES; TOLERANCE INDUCTION; CLONAL DELETION; FLOW-CYTOMETRY; CD8 LINEAGE; ANTIGEN AB T cells begin their development as precursor cells in the bone marrow. These cells migrate to the thymus, where they further divide, differentiate, and mature into functional T cells. Most thymocytes (95-99%) die in the course of this process, and only relatively few exit the thymus as mature cells. Here we develop a differential equation model of cell proliferation, differentiation and death in the thymus that can account for both the total number of thymus cells and the fractions of various types of immature and mature thymocytes. Our model suggests that positive and negative selection may have more complex effects than simply deleting some cells and allowing others to survive. (C) 1995 Academic Press Limited C1 WEIZMANN INST SCI,DEPT CELL BIOL,IL-76100 REHOVOT,ISRAEL. WEIZMANN INST SCI,DEPT APPL MATH & COMP SCI,IL-76100 REHOVOT,ISRAEL. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP MEHR, R (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MAIL STOP K710,DROP POINT 3-483-01U,LOS ALAMOS,NM 87545, USA. OI Mehr, Ramit/0000-0002-4303-6834 FU NIAID NIH HHS [AI28433] NR 86 TC 36 Z9 37 U1 0 U2 0 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-5193 J9 J THEOR BIOL JI J. Theor. Biol. PD JUL 7 PY 1995 VL 175 IS 1 BP 103 EP 126 DI 10.1006/jtbi.1995.0124 PG 24 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA RJ368 UT WOS:A1995RJ36800010 PM 7564390 ER PT J AU BOO, DW LIU, ZF SUITS, AG TSE, JS LEE, YT AF BOO, DW LIU, ZF SUITS, AG TSE, JS LEE, YT TI DYNAMICS OF CARBONIUM-IONS SOLVATED BY MOLECULAR-HYDROGEN - CH5+(H-2)(N) (N=1, 2, 3) SO SCIENCE LA English DT Article ID CH5+ AB The dynamics of the carbonium ion (CH5+), a highly reactive intermediate with no equilibrium structure, was studied by measuring the infrared spectra for internally cold CH5+(H-2)(n) (n = 1,2,3) stored in an ion trap. First-principle molecular dynamics methods were used to directly simulate the internal motion for these ionic complexes. The combined experimental and theoretical efforts substantiated the anticipated scrambling motion in the CH5+ core and revealed the effect of the solvent molecular hydrogen in slowing down the scrambling. The results indicate the feasibility of using solvent molecules to stabilize the floppy CH5+ ion in order to make it amenable to spectroscopic study. C1 NATL RES COUNCIL CANADA,STEACIE INST MOLEC SCI,OTTAWA,ON K1A 0R6,CANADA. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RI Lee, Yuan-Tseh/F-7914-2012 NR 22 TC 56 Z9 56 U1 1 U2 12 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD JUL 7 PY 1995 VL 269 IS 5220 BP 57 EP 59 DI 10.1126/science.269.5220.57 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RG980 UT WOS:A1995RG98000029 PM 17787703 ER PT J AU CHOQUETTE, KD SCHNEIDER, RP CRAWFORD, MH GEIB, KM FIGIEL, JJ AF CHOQUETTE, KD SCHNEIDER, RP CRAWFORD, MH GEIB, KM FIGIEL, JJ TI CONTINUOUS-WAVE OPERATION OF 640-660NM SELECTIVELY OXIDIZED ALGAINP VERTICAL-CAVITY LASERS SO ELECTRONICS LETTERS LA English DT Article DE VERTICAL CAVITY SURFACE EMITTING LASERS; LASERS AB The performance of AlGaInP visible vertical-cavity laser diodes fabricated using selective oxidation is reported. At room temperature, the lasers exhibit-continuous wave operation from 678 to 642 nm, with 642 nm being the shortest wavelength attained to date. In addition, these lasers possess the lowest threshold currents (660 mu A) and voltages (150 mV above photon energy) reported for visible vertical-cavity lasers. RP CHOQUETTE, KD (reprint author), SANDIA NATL LABS,PHOTON RES DEPT,ALBUQUERQUE,NM 87185, USA. NR 10 TC 60 Z9 60 U1 0 U2 3 PU IEE-INST ELEC ENG PI HERTS PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTS, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD JUL 6 PY 1995 VL 31 IS 14 BP 1145 EP 1146 DI 10.1049/el:19950814 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA RL032 UT WOS:A1995RL03200025 ER PT J AU SMITH, DH JOHNSON, GK AF SMITH, DH JOHNSON, GK TI TEMPERATURE-DEPENDENCE OF EMULSION MORPHOLOGIES AND THE DISPERSION MORPHOLOGY DIAGRAM .2. 3-PHASE EMULSIONS SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SYSTEMS; OIL; SURFACTANT; INVERSION; BEHAVIOR; WATER AB Using several different compositions of the (pseudo)ternary amphiphile/oil/''water'' system C6H13(OC2H4)(2)OH/n-tetradecane/aqueous 10 mM NaCl, we show by means of electrical conductivity measurements that the temperature dependencies of the emulsion morphologies were consistent with predictions from isothermal dispersion morphology diagrams, thus contradicting phase inversion temperature ideas. C1 UNIV OKLAHOMA,INST APPL SURFACTANT RES,NORMAN,OK 73019. UNIV OKLAHOMA,SCH CHEM ENGN & MAT SCI,NORMAN,OK 73019. RP SMITH, DH (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,POB 880,MORGANTOWN,WV 26507, USA. NR 26 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 6 PY 1995 VL 99 IS 27 BP 10853 EP 10857 DI 10.1021/j100027a028 PG 5 WC Chemistry, Physical SC Chemistry GA RH221 UT WOS:A1995RH22100028 ER PT J AU LONOSTRO, P KU, CY CHEN, SH LIN, JS AF LONOSTRO, P KU, CY CHEN, SH LIN, JS TI EFFECT OF A SEMIFLUORINATED COPOLYMER ON THE PHASE-SEPARATION OF A FLUOROCARBON/HYDROCARBON MIXTURE SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID LIQUID-CRYSTALLINE PHASES; NORMAL-ALKANES; HYDROCARBON LIQUIDS; BEHAVIOR; TRANSITIONS; MOLECULES AB Fluorocarbons (CnF2n+2) and hydrocarbons (CnH2n+2) are mutually immiscible at room temperature, while they form clear and homogeneous mixtures at high temperatures. The phase separation curves of these systems show upper critical solution temperatures (UCST), which depend on the chemical formulas of the two liquids. In this paper we report the first observation of the mixing between perfluorooctane (PFO) and isooctane (i-OCT) at low temperature upon addition of a semifluorinated diblock copolymer (F8H16) Further cooling results in phase separation or formation of solid gels, depending on the amount of copolymer added to the mixture. Phase diagrams, light-scattering, birefringence, and small-angle X-ray-scattering measurements indicate the presence of microdomains in the gel and in the liquid phase, depending on the temperature and on the copolymer volume fraction. C1 MIT, DEPT NUCL ENGN, CAMBRIDGE, MA 02139 USA. OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. UNIV FLORENCE, DIPARTIMENTO CHIM, I-50121 FLORENCE, ITALY. RP LONOSTRO, P (reprint author), UNIV S FLORIDA, DEPT CHEM, TAMPA, FL 33620 USA. RI Lo Nostro, Pierandrea/G-6585-2011 NR 31 TC 27 Z9 27 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 6 PY 1995 VL 99 IS 27 BP 10858 EP 10864 PG 7 WC Chemistry, Physical SC Chemistry GA RH221 UT WOS:A1995RH22100029 ER PT J AU GREEN, JBD MCDERMOTT, MT PORTER, MD SIPERKO, LM AF GREEN, JBD MCDERMOTT, MT PORTER, MD SIPERKO, LM TI NANOMETER-SCALE MAPPING OF CHEMICALLY DISTINCT DOMAINS AT WELL-DEFINED ORGANIC INTERFACES USING FRICTIONAL FORCE MICROSCOPY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SELF-ASSEMBLED MONOLAYERS; SCANNING ELECTRON-MICROSCOPY; LANGMUIR-BLODGETT-FILMS; THIN-FILMS; GOLD; SURFACES; SILVER; IMAGES; SHEAR; ACIDS AB This paper demonstrates the ability to map chemically distinct domains at nanometer length scales using frictional force microscopy (FFM). The basis of this characterization is the dependence of the frictional interactions on the identity of the chemical functional groups at the outermost few angstroms of microscopic contacting areas, i.e., the surface free energies. Such a dependence is confirmed by characterizations of the frictional force between a variety of end-group-derivatized alkanethiolate monolayers deposited at both gold-coated sample substrates and gold-coated FFM probe tips. Coupled with this dependence, we show that the composition of chemically distinct domains at partially formed bilayer structures can be mapped at a spatial resolution of similar to 10 nm, with the image contrast governed by the surface free energies of the microscopic contacts. Opportunities presented by these findings are briefly discussed. C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, CTR MICROANALYT INSTRUMENTAT, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. IBM CORP, DIV MICROELECTR, ANALYT SOLUT LAB, ENDICOTT, NY 13760 USA. OI McDermott, Mark/0000-0001-8372-0158 NR 53 TC 195 Z9 196 U1 0 U2 10 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 JUL 6 PY 1995 VL 99 IS 27 BP 10960 EP 10965 DI 10.1021/j100027a041 PG 6 WC Chemistry, Physical SC Chemistry GA RH221 UT WOS:A1995RH22100041 ER PT J AU DADACHOVA, E MIRZADEH, S LAMBRECHT, RM AF DADACHOVA, E MIRZADEH, S LAMBRECHT, RM TI TUNGSTATE ION-ALUMINA INTERACTION IN A W-188-]RE-188 BIOMEDICAL GENERATOR SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID CATALYSTS AB The surface interaction between WO42- ions and the alumina support in the W-188 --> Re-188/Al2O3 biomedical generator system was examined by the dynamic adsorption method employing the W-187 tracer and by FT-LR, Raman; Al-27 MAS NMR, and XPS spectroscopic methods. These studies demonstrated the complex physical and chemical nature of WO42- ion adsorption on alumina. The dynamic adsorption studies indicated that the adsorption process includes several stages from initial monolayer formation to almost complete saturation of the alumina surface. FTIR, Raman, and Al-27 MAS NMR data showed that adsorption of WO42- on the Al2O3 surface in slightly acidic solutions proceeds via formation of thermodynamically stable complexes of tetrahedrally coordinated aluminum atoms and WO42- tetrahedrons. Previously, these complexes were shown to form, and were identified, only under calcination conditions. Our conclusion on the nature of WO42--Al2O3 complex in aqueous solutions was further supported by the results from XPS studies where it was shown that W-containing species are strongly attached to the surface of alumina via W-O bonds. C1 OAK RIDGE NATL LAB,DIV HLTH SCI RES,NUCL MED GRP,OAK RIDGE,TN 37831. AUSTRALIAN NUCL SCI & TECHNOL ORG,LUCAS HTS RES LABS,BIOMED & HLTH PROGRAM,MENAI,NSW 2234,AUSTRALIA. UNIV WOLLONGONG,DEPT CHEM,WOLLONGONG,NSW 2500,AUSTRALIA. RI Dadachova, Ekaterina/I-7838-2013 NR 22 TC 6 Z9 6 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD JUL 6 PY 1995 VL 99 IS 27 BP 10976 EP 10981 DI 10.1021/j100027a044 PG 6 WC Chemistry, Physical SC Chemistry GA RH221 UT WOS:A1995RH22100044 ER PT J AU CHEN, SS ZHU, S CAI, Y AF CHEN, SS ZHU, S CAI, Y TI AN UNSTEADY-FLOW THEORY FOR VORTEX-INDUCED VIBRATION SO JOURNAL OF SOUND AND VIBRATION LA English DT Article ID MODEL AB A mathematical model for vortex-induced vibration of circular, cylindrical structures that is presented in this paper is based on the unsteady flow theory. Motion-dependent fluid forces are measured in a water channel. From the measured fluid forces, fluid stiffness and fluid damping coefficients are calculated as a function of reduced flow velocity and oscillation amplitude. Once these coefficients are known, the mathematical model can be applied to predict the structural response to vortex shedding, including response amplitude, lock-in frequency and stability characteristics. (C) 1995 Academic Press Limited RP CHEN, SS (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 21 TC 20 Z9 20 U1 0 U2 0 PU ACADEMIC PRESS (LONDON) LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-460X J9 J SOUND VIB JI J. Sound Vibr. PD JUL 6 PY 1995 VL 184 IS 1 BP 73 EP 92 DI 10.1006/jsvi.1995.0305 PG 20 WC Acoustics; Engineering, Mechanical; Mechanics SC Acoustics; Engineering; Mechanics GA RG285 UT WOS:A1995RG28500006 ER PT J AU WELP, U GUNTER, DO CRABTREE, GW ZHONG, W BALACHANDRAN, U HALDAR, P SOKOLOWSKI, RS VLASKOVLASOV, VK NIKITENKO, VI AF WELP, U GUNTER, DO CRABTREE, GW ZHONG, W BALACHANDRAN, U HALDAR, P SOKOLOWSKI, RS VLASKOVLASOV, VK NIKITENKO, VI TI IMAGING OF TRANSPORT CURRENTS IN SUPERCONDUCTING (BI,PB)(2)SR2CA2CU3OX COMPOSITES SO NATURE LA English DT Article AB IMPROVEMENTS in the current carrying capacity of high-T-c superconducting composite conductors will come from a detailed understanding of the connection between current how and microstructure. Slicing experiments(1-3) on silver-sheathed monofilamentary (Bi, Pb)(2)Sr2Ca2Cu3Ox (Bi-2223), combined with microstructural studies(4,5), have suggested that current dow is enhanced in well textured Bi-2223 layers at the superconductor/silver interface, but the spatial resolution of the slicing experiments is insufficient to identify the actual current path, More recently, magneto-optical imaging in an applied field(6-10) has been used to measure spatial variations in the shielding critical current density on a micrometre scale in Bi-2212 and Bi-2223 mono- and multifilamentary composites, Here we use an extension of this technique to measure spatial variations in transport critical current density; J(c), in a Bi-2223 multifilamentary composite at close to real operating conditions, Current densities of up to 8 x 10(4) a cm(-2) at 77 K in self-field are observed in well aligned Bi-2223 grain colonies of 2-3 mu m width. The superconductor/silver interface does not, in general, constitute a continuous high-current path because of frequent interruptions by second-phase particles; elimination of these particles in the interface layer could result in a threefold increase in J(c). C1 ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439. INTERMAGNET GEN CORP,LATHAM,NY 12110. INST SOLID STATE PHYS,CHERNOGOLOVKA 142432,RUSSIA. RP WELP, U (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 14 TC 50 Z9 51 U1 0 U2 1 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD JUL 6 PY 1995 VL 376 IS 6535 BP 44 EP 46 DI 10.1038/376044a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RH111 UT WOS:A1995RH11100056 ER PT J AU HAUSCHILD, K WADSWORTH, R CLARK, RM FALLON, P FOSSAN, DB HIBBERT, IM MACCHIAVELLI, AO NOLAN, PJ SCHNARE, H SEMPLE, AT THORSLUND, I WALKER, L SATULA, W WYSS, R AF HAUSCHILD, K WADSWORTH, R CLARK, RM FALLON, P FOSSAN, DB HIBBERT, IM MACCHIAVELLI, AO NOLAN, PJ SCHNARE, H SEMPLE, AT THORSLUND, I WALKER, L SATULA, W WYSS, R TI NEUTRON ORBITALS ABOVE THE N=74 SHELL GAP AT LARGE-DEFORMATION - SPECTROSCOPY IN THE SUPERDEFORMED MINIMUM OF CE-133 SO PHYSICS LETTERS B LA English DT Article ID LIFETIME MEASUREMENTS; LINKING TRANSITIONS; YRAST LINE; BANDS; NUCLEI; STATES AB High-spin states in Ce-133 were populated via the Cd-116(Ne-22,5n) reaction at 120 MeV. Analysis of these data has revealed three new superdeformed bands in Ce-133, two of which have transitions which are identical to those observed in the yrast bands of Ce-132 and Nd-136. These bands have been interpreted as signature partners of the [530] 1/2(-) orbital coupled to the Ce-132 yrast superdeformed core. The third band is believed to be built upon a pi 5(4) nu 6(3) configuration at high rotational frequency and to show the effects resulting from an alignment of a pair of f(7/2) neutrons at ($) over bar h omega similar or equal to 0.7 MeV. It is tentatively suggested that the sharp rise in the dynamic moment of inertia of this band at low rotational frequency may result from an admixture of the pi 5(4) nu 6(1) configuration. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. MANNE SIEGBAHN INST PHYS,S-10405 STOCKHOLM,SWEDEN. UNIV WARSAW,INST THEORET PHYS,PL-00681 WARSAW,POLAND. RP HAUSCHILD, K (reprint author), UNIV YORK,DEPT PHYS,YORK YO1 5DD,N YORKSHIRE,ENGLAND. RI Hauschild, Karl/A-6726-2009 NR 29 TC 25 Z9 25 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 JUL 6 PY 1995 VL 353 IS 4 BP 438 EP 443 DI 10.1016/0370-2693(95)00601-G PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ453 UT WOS:A1995RJ45300005 ER PT J AU AMSLER, C ARMSTRONG, DS BAKER, CA BARNETT, BM BATTY, CJ BEUCHERT, K BIRIEN, P BLUM, P BOSSINGHAM, R BRAUNE, K BROSE, J BUGG, DV BURCHELL, M CASE, T CHUNG, SU COOPER, A CRAMER, O CROWE, KM DEGENER, T DIETZ, HP DJAOSHVILI, N VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C GIARRITTA, P HACKMANN, R HADDOCK, RP HEINSIUS, FH HERZ, M HESSEY, NP HIDAS, P HOLZHAUSSEN, C ILLINGER, P JAMNIK, D KALINOWSKY, H KALTEYER, B KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOBEL, M KOCH, H KOLO, C KONIGSMANN, K KUNZE, M LAKATA, M LANDUA, R LUDEMANN, J MATTHAEY, H MCCRADY, R MERKEL, M MERLO, JP MEYER, CA MONTANET, L NOBLE, A OUARED, R OULDSAADA, F PETERS, K PINDER, CN PINTER, G RAVNDAL, S REGENFUS, C RESAG, S SCHAFER, E SCHMIDT, P SEIBERT, R SPANIER, S STOCK, H STRASSBURGER, C STROHBUSCH, U SUFFERT, M THOMA, U TISCHHAUSER, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U ZOLL, J ZOU, BS ZUPANCIC, C AF AMSLER, C ARMSTRONG, DS BAKER, CA BARNETT, BM BATTY, CJ BEUCHERT, K BIRIEN, P BLUM, P BOSSINGHAM, R BRAUNE, K BROSE, J BUGG, DV BURCHELL, M CASE, T CHUNG, SU COOPER, A CRAMER, O CROWE, KM DEGENER, T DIETZ, HP DJAOSHVILI, N VONDOMBROWSKI, S DOSER, M DUNNWEBER, W ENGELHARDT, D ENGLERT, M FAESSLER, MA FELIX, C GIARRITTA, P HACKMANN, R HADDOCK, RP HEINSIUS, FH HERZ, M HESSEY, NP HIDAS, P HOLZHAUSSEN, C ILLINGER, P JAMNIK, D KALINOWSKY, H KALTEYER, B KAMMLE, B KIEL, T KISIEL, J KLEMPT, E KOBEL, M KOCH, H KOLO, C KONIGSMANN, K KUNZE, M LAKATA, M LANDUA, R LUDEMANN, J MATTHAEY, H MCCRADY, R MERKEL, M MERLO, JP MEYER, CA MONTANET, L NOBLE, A OUARED, R OULDSAADA, F PETERS, K PINDER, CN PINTER, G RAVNDAL, S REGENFUS, C RESAG, S SCHAFER, E SCHMIDT, P SEIBERT, R SPANIER, S STOCK, H STRASSBURGER, C STROHBUSCH, U SUFFERT, M THOMA, U TISCHHAUSER, M URNER, D VOLCKER, C WALTER, F WALTHER, D WIEDNER, U ZOLL, J ZOU, BS ZUPANCIC, C TI HIGH STATISTICS STUDY OF F(0)(1500) DECAY INTO ETA-ETA SO PHYSICS LETTERS B LA English DT Article ID ANTIPROTON PROTON ANNIHILATIONS; RESONANCE; G(1590); PI; MESONS AB A partial wave analysis of the reaction ($) over bar pp-->pi(0) eta eta has been performed, using a high quality, high statistics data set of 198,000 events. In addition to the f(0)(1370), a second scalar resonance decaying into eta eta, the f(0)(1500), with mass m =(1505 +/- 15) MeV and width Gamma = (120 +/- 30) MeV has to be introduced to describe the data. C1 UNIV BOCHUM,D-44780 BOCHUM,GERMANY. UNIV BONN,D-53115 BONN,GERMANY. HUNGARIAN ACAD SCI,H-1525 BUDAPEST,HUNGARY. RUTHERFORD APPLETON LAB,CHILTON OX11 0QX,ENGLAND. CERN,CH-1211 GENEVA,SWITZERLAND. UNIV HAMBURG,D-22761 HAMBURG,GERMANY. UNIV KARLSRUHE,D-76021 KARLSRUHE,GERMANY. UNIV LONDON QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV MAINZ,D-55099 MAINZ,GERMANY. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. UNIV MUNICH,D-80333 MUNICH,GERMANY. CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP AMSLER, C (reprint author), UNIV ZURICH,CH-8057 ZURICH,SWITZERLAND. NR 24 TC 70 Z9 70 U1 0 U2 3 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 JUL 6 PY 1995 VL 353 IS 4 BP 571 EP 577 DI 10.1016/0370-2693(95)00610-W PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA RJ453 UT WOS:A1995RJ45300026 ER PT J AU DANG, LX AF DANG, LX TI MECHANISM AND THERMODYNAMICS OF ION SELECTIVITY IN AQUEOUS-SOLUTIONS OF 18-CROWN-6 ETHER - A MOLECULAR-DYNAMICS STUDY SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID RELATIVE FREE-ENERGIES; ALKALI-METAL CATIONS; BINDING; WATER; COMPLEXATION; RECOGNITION; SIMULATION; IONOPHORE; SYSTEMS AB We have performed extensive classical molecular dynamics simulations to examine the mechanism and thermodynamics for ion selectivity of 18-crown-6 ether in aqueous solutions. We have computed the free energy profiles or potentials of mean force and the corresponding binding free energies for M(+):18-crown-6 (M(+) = K+, Na+, Rb+, Cs+) complexation in water. The long-range interactions are computed via the Ewald summation method, and counterion effects are considered. To the best of our knowledge, the present work is the first to employ the potential of mean force approach to the evaluation of crown ether selectivity in an aqueous solution. The resultant potentials of mean force indicate that minima free energy surfaces for K+ and Na+ are located at the crown ether center-of-mass. A well-defined second minimum is also observed in the potential of mean force of the Na+:18-crown-6 complex in water. It appears that Kf is selected over Nai because of the greater free energy penalty associated with displacing water molecules from Na+ as it approaches the crown ether. This leads to a substantial increase in the activation free energy and a decrease in the corresponding binding free energy for Na+:18-crown-6 complexation as compared to K+:18-crown-6. The selection of K+ over Rb+ and Cs+ is due to the size of the cation relative to that of the crown ether cavity. Although the calculated binding free energies underestimate the experimental measurements, they correctly reproduce the experimental sequence trends K+ > Rb+ > Cs+ > Na+. The present work not only reproduces the experimental observations but also provides a detailed physical description of the mechanism for ion selectivity in macrocyclic crown ethers. RP DANG, LX (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 39 TC 284 Z9 284 U1 15 U2 71 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUL 5 PY 1995 VL 117 IS 26 BP 6954 EP 6960 DI 10.1021/ja00131a018 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA RG976 UT WOS:A1995RG97600018 ER PT J AU TAN, KM DAROVSKY, A PARISE, JB AF TAN, KM DAROVSKY, A PARISE, JB TI SYNTHESIS OF A NOVEL OPEN-FRAMEWORK SULFIDE, CUGE2S5-CENTER-DOT(C2H5)(4)N, AND ITS STRUCTURE SOLUTION USING SYNCHROTRON IMAGING PLATE DATA SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID MOLECULAR-SIEVE SYNTHESIS; X-RAY-DIFFRACTION; CRYSTAL-STRUCTURES C1 SUNY STONY BROOK,CHIPR,STONY BROOK,NY 11794. SUNY STONY BROOK,DEPT EARTH & SPACE SCI,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,SUNY X3 BEAMLINE,UPTON,NY 11973. NR 35 TC 72 Z9 73 U1 2 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD JUL 5 PY 1995 VL 117 IS 26 BP 7039 EP 7040 DI 10.1021/ja00131a042 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA RG976 UT WOS:A1995RG97600042 ER PT J AU SEBBAN, P MAROTI, P SCHIFFER, M HANSON, DK AF SEBBAN, P MAROTI, P SCHIFFER, M HANSON, DK TI ELECTROSTATIC DOMINOES - LONG-DISTANCE PROPAGATION OF MUTATIONAL EFFECTS IN PHOTOSYNTHETIC REACTION CENTERS OF RHODOBACTER-CAPSULATUS SO BIOCHEMISTRY LA English DT Article ID BACTERIAL REACTION CENTERS; RHODOPSEUDOMONAS-VIRIDIS; PROTON-TRANSFER; BINDING-SITE; 2ND-SITE MUTATION; SECONDARY QUINONE; SPHAEROIDES R-26; PATHWAY; STATES; MUTANT AB Two point mutants from the purple bacterium Rhodobacter capsulatus, both modified in the M protein of the photosynthetic reaction center, have been studied by flash-induced absorbance spectroscopy. These strains carry either the M231Arg --> Leu or M43Asn --> Asp mutations, which are located 9 and 15 Angstrom, respectively, from the terminal electron acceptor Q(B). In the wild-type Rb. sphaeroides structure, M231Arg is involved in a conserved salt bridge with H125Glu and H232Glu and M43Asn is located among several polar residues that form or surround the Q(B) binding site. These substitutions were originally uncovered in phenotypic revertants isolated from the photosynthetically incompetent L212Glu-L213Asp --> Ala-Ala site-specific double mutant. As second-site suppressor mutations, they have been shown to restore the proton transfer function that is interrupted in the L212Ala-L213Ala double mutant. The electrostatic effects that are induced in reaction centers by the M231Arg --> Leu and M43Asn --> Asp substitutions are roughly the same in either the double-mutant or wild-type backgrounds. In a reaction center that is otherwise wild type in sequence, they decrease the free energy gap between the Q(A)(-) and Q(B)(-) states by 24 +/- 5 and 45 +/- 5 meV, respectively. The pH dependences of K-2, the Q(A)(-)Q(B) <-> Q(A)Q(B)(-) equilibrium constant, are altered in reaction centers that carry either of these substitutions, revealing differences in the pK(a)s of titratable groups compared to the wild type. These results confirm that interactions among distant residues influence the electrostatic potential in the immediate vicinity of Q(B) to ensure the efficient conduction of protons through the protein matrix and their delivery to the reduced quinone. It is possible that these influences are propagated over such large distances by mutation-induced realignments of salt bridges within a network of acidic and basic residues that is located in this region of the reaction center, which could serve as a relay mechanism to partially relocate the new negative charge much closer to the quinone. C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. CNRS,CTR GENET MOLEC,F-91198 GIF SUR YVETTE,FRANCE. ATTILA JOZSEF UNIV,INST BIOPHYS,H-6722 SZEGED,HUNGARY. FU NIGMS NIH HHS [GM36598] NR 35 TC 65 Z9 67 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD JUL 4 PY 1995 VL 34 IS 26 BP 8390 EP 8397 DI 10.1021/bi00026a021 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA RH036 UT WOS:A1995RH03600021 PM 7599129 ER PT J AU CARLISLE, JA TERMINELLO, LJ HUDSON, EA PERERA, RCC UNDERWOOD, JH CALLCOTT, TA JIA, JJ EDERER, DL HIMPSEL, FJ SAMANT, MG AF CARLISLE, JA TERMINELLO, LJ HUDSON, EA PERERA, RCC UNDERWOOD, JH CALLCOTT, TA JIA, JJ EDERER, DL HIMPSEL, FJ SAMANT, MG TI CHARACTERIZATION OF BURIED THIN-FILMS WITH RESONANT SOFT-X-RAY FLUORESCENCE SO APPLIED PHYSICS LETTERS LA English DT Article ID EXCITATION-ENERGY DEPENDENCE; EMISSION-SPECTRA; ATOMIC-STRUCTURE; SCATTERING; INTERFACE; GROWTH; EDGE; SI C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV TENNESSEE,KNOXVILLE,TN 37996. TULANE UNIV,NEW ORLEANS,LA 70118. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. IBM RES CORP,ALMADEN RES CTR,SAN JOSE,CA 95120. RP CARLISLE, JA (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 19 TC 24 Z9 24 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 JUL 3 PY 1995 VL 67 IS 1 BP 34 EP 36 DI 10.1063/1.115483 PG 3 WC Physics, Applied SC Physics GA RF829 UT WOS:A1995RF82900012 ER PT J AU SAFAR, H CHO, JH FLESHLER, S MALEY, MP WILLIS, JO COULTER, JY ULLMANN, JL LISOWSKI, PW RILEY, GN RUPICH, MW THOMPSON, JR KRUSINELBAUM, L AF SAFAR, H CHO, JH FLESHLER, S MALEY, MP WILLIS, JO COULTER, JY ULLMANN, JL LISOWSKI, PW RILEY, GN RUPICH, MW THOMPSON, JR KRUSINELBAUM, L TI ENHANCEMENT OF TRANSPORT CRITICAL-CURRENT DENSITIES AT 75 K IN (BI,PB)(2)SR2CA2CU3OY/AG TAPES BY MEANS OF FISSION TRACKS FROM IRRADIATION BY 0.8 GEV PROTONS SO APPLIED PHYSICS LETTERS LA English DT Article ID COLUMNAR DEFECTS; SUPERCONDUCTORS C1 AMER SUPERCONDUCTOR CORP,WESTBOROUGH,MA 01581. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP SAFAR, H (reprint author), LOS ALAMOS NATL LAB,CTR SUPERCONDUCT TECHNOL,POB 1663,MS-K763,LOS ALAMOS,NM 87545, USA. NR 9 TC 71 Z9 71 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 JUL 3 PY 1995 VL 67 IS 1 BP 130 EP 132 DI 10.1063/1.115506 PG 3 WC Physics, Applied SC Physics GA RF829 UT WOS:A1995RF82900044 ER PT J AU LYON, WS AF LYON, WS TI NUCLEAR MEASUREMENTS LONG AGO SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS LA English DT Article RP LYON, WS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH LE JI J. Radioanal. Nucl. Chem.-Lett. PD JUL 3 PY 1995 VL 200 IS 4 BP 277 EP 281 DI 10.1007/BF02163781 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA RH442 UT WOS:A1995RH44200001 ER PT J AU LAMBERT, SM SONG, YH PRAUSNITZ, JM AF LAMBERT, SM SONG, YH PRAUSNITZ, JM TI THETA-CONDITIONS IN BINARY AND MULTICOMPONENT POLYMER-SOLUTIONS USING A PERTURBED HARD-SPHERE-CHAIN EQUATION OF STATE SO MACROMOLECULES LA English DT Article ID CRITICAL SOLUTION TEMPERATURES; POLYSTYRENE SOLUTIONS; PRESSURE-DEPENDENCE; STATISTICAL THERMODYNAMICS; ASSOCIATING MOLECULES; COEXISTENCE CURVE; METHYLCYCLOHEXANE; POLYDISPERSE; MIXTURES; FLUIDS AB Theta (Theta) conditions in binary and multicomponent polymer solutions are calculated using a perturbed hard-sphere-chain (PHSC) equation of state. Theta conditions are identified by roots of the spinodal criterion in the limit of infinite polymer molecular weight and zero polymer-segment fraction. Because the thermodynamic properties of mixtures are described by an equation of state, both upper and lower Theta temperatures can be calculated. For binary systems (one polymer and one solvent), experimentally determined Theta conditions and the critical solution temperature for a single polymer molecular weight are used to obtain equation-of-state parameters. Parameters obtained in this manner yield nearly quantitative representation of upper and lower Theta temperatures as a function of pressure and upper and lower critical solution temperatures as a function of polymer molecular weight. For ternary systems (two solvents and one polymer), the dependence of the Theta temperature on solvent composition can be described using parameters obtained from binary data. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 51 TC 20 Z9 22 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD JUL 3 PY 1995 VL 28 IS 14 BP 4866 EP 4876 DI 10.1021/ma00118a012 PG 11 WC Polymer Science SC Polymer Science GA RH916 UT WOS:A1995RH91600012 ER PT J AU SMITH, AB AF SMITH, AB TI FAST-NEUTRON SCATTERING AT Z=50 - TIN SO NUCLEAR PHYSICS A LA English DT Article DE SN(N,N), (N,N'); E=1.5-10 MEV; MEASURED SIGMA(THETA); OPTICAL STATISTICAL AND COUPLED-CHANNELS MODELS; ATTENTION TO ISOPIN AND COLLECTIVE EFFECTS ID CLOSED-SHELL NUCLEI; TOTAL CROSS-SECTIONS; INELASTIC-SCATTERING; ELASTIC-SCATTERING; OPTICAL-MODEL; ENERGY-DEPENDENCE; ISOTOPES; STATE AB Neutron-elastic- and -inelastic-scattering cross sections of elemental tin were measured from approximate to 1.5 to 10 MeV. Below 3 MeV, ten angular intervals were used distributed between approximate to 20 degrees and 160 degrees, and the incident-energy increments were approximate to 0.1 MeV. From 3 to 4 MeV, 20 angular intervals, distributed over the same angular range, were used, and the energy increments were approximate to 0.2 MeV. From 4.5 to 10 MeV the measurements were made at greater than or equal to 40 angular intervals distributed between approximate to 10 degrees and 160 degrees, and at energy increments of approximate to 0.5 MeV. Inelastically scattered neutron groups corresponding to average excitations of approximate to 1.15 and approximate to 2.27 MeV were observed. The experimental results were combined with elemental and isotopic values from the literature, to form a comprehensive data base extending to 24 MeV for physical interpretations using optical-statistical and coupled-channels models, with attention to isospin and collective effects. These physical interpretations were compared with present and previously reported results and with physical concepts. C1 UNIV ARIZONA,TUCSON,AZ 85721. RP SMITH, AB (reprint author), ARGONNE NATL LAB,DIV TECHNOL DEV,9700 S CASS AVE,D-207,AA-133A,ARGONNE,IL 60439, USA. NR 82 TC 3 Z9 3 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 JUL 3 PY 1995 VL 589 IS 2 BP 201 EP 221 DI 10.1016/0375-9474(95)00031-U PG 21 WC Physics, Nuclear SC Physics GA RH489 UT WOS:A1995RH48900001 ER PT J AU ABE, F ALBROW, MG AMENDOLIA, SR 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 BROMBERG, C 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 CHAO, HY CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CHIOU, CN CHRISTOFEK, L CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M COUYOUMTZELIS, C CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DITTMANN, JR 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 GRASSMAN, H GREWAL, A 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 LABANCA, N 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 LUCHESI, D LUCHINI, CB LUKENS, P LYS, J 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 TENG, PK 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, SC VEJCIK, S VIDAL, R VONDRACEK, M VUCINIC, D WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, C WANG, CH WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WEI, C 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 YOSEF, C 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 AMENDOLIA, SR 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 BROMBERG, C 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 CHAO, HY CHAPMAN, J CHENG, MT CHIARELLI, G CHIKAMATSU, T CHIOU, CN CHRISTOFEK, L CIHANGIR, S CLARK, AG COBAL, M CONTRERAS, M CONWAY, J COOPER, J CORDELLI, M COUYOUMTZELIS, C CRANE, D CUNNINGHAM, JD DANIELS, T DEJONGH, F DELCHAMPS, S DELLORSO, M DEMORTIER, L DENBY, B DENINNO, M DERWENT, PF DEVLIN, T DICKSON, M DITTMANN, JR 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 GRASSMAN, H GREWAL, A 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 LABANCA, N 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 LUCHESI, D LUCHINI, CB LUKENS, P LYS, J 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 TENG, PK 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, SC VEJCIK, S VIDAL, R VONDRACEK, M VUCINIC, D WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WANG, C WANG, CH WANG, G WANG, J WANG, MJ WANG, QF WARBURTON, A WATTS, G WATTS, T WEBB, R WEI, C 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 YOSEF, C YOSHIDA, T YOVANOVITCH, D YU, I YUN, JC ZANETTI, A ZETTI, F ZHANG, L ZHANG, S ZHANG, W ZUCCHELLI, S TI MEASUREMENT OF THE W-BOSON MASS SO PHYSICAL REVIEW LETTERS LA English DT Article ID = 1.8 TEV; PBARP COLLISIONS; DECAY 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,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV 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. 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. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP ABE, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Vucinic, Dejan/C-2406-2008; 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; Tartarelli, Giuseppe Francesco/A-5629-2016; 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; Tartarelli, Giuseppe Francesco/0000-0002-4244-502X; Wyss, Jeffery/0000-0002-8277-4012; Bertolucci, Sergio/0000-0003-1738-4736; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Turini, Nicola/0000-0002-9395-5230 NR 22 TC 96 Z9 96 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 JUL 3 PY 1995 VL 75 IS 1 BP 11 EP 16 DI 10.1103/PhysRevLett.75.11 PG 6 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000004 ER PT J AU ABE, K AKAGI, T ANTHONY, PL ANTONOV, R ARNOLD, RG AVERETT, T BAND, HR BAUER, JM BOREL, H BOSTED, PE BRETON, V BUTTONSHAFER, J CHEN, JP CHUPP, TE CLENDENIN, J COMPTOUR, C COULTER, KP COURT, G CRABB, D DAOUDI, M DAY, D DIETRICH, FS DUNNE, J DUTZ, H ERBACHER, R FELLBAUM, J FELTHAM, A FONVIEILLE, H FRLEZ, E GARVEY, D GEARHART, R GOMEZ, J GRENIER, PO GRIFFIOEN, KA HOIBRATEN, S HUGHES, EW HYDEWRIGHT, C JOHNSON, JR KAWALL, D KLEIN, A KUHN, SE KURIKI, M LINDGREN, R LIU, T LOMBARDNELSEN, RM MARRONCLE, J MARUYAMA, T MARUYAMA, XK MCCARTHY, J MEYER, W MEZIANI, ZE MINEHART, R MITCHELL, J MORGENSTERN, J PETRATOS, GG PITTHAN, R POCANIC, D PRESCOTT, C PREPOST, R RAINES, P RAUE, B REYNA, D RIJLLART, A ROBLIN, Y ROCHESTER, LS ROCK, SE RONDON, OA SICK, I SMITH, LC SMITH, TB SPENGOS, M STALEY, F STEINER, P STLORANT, S STUART, LM SUEKANE, F SZALATA, ZM TANG, H TERRIEN, Y USHER, T WALZ, D WHITE, JL WITTE, K YOUNG, CC YOUNGMAN, B YUTA, H ZAPALAC, G ZIHLMANN, B ZIMMERMANN, D AF ABE, K AKAGI, T ANTHONY, PL ANTONOV, R ARNOLD, RG AVERETT, T BAND, HR BAUER, JM BOREL, H BOSTED, PE BRETON, V BUTTONSHAFER, J CHEN, JP CHUPP, TE CLENDENIN, J COMPTOUR, C COULTER, KP COURT, G CRABB, D DAOUDI, M DAY, D DIETRICH, FS DUNNE, J DUTZ, H ERBACHER, R FELLBAUM, J FELTHAM, A FONVIEILLE, H FRLEZ, E GARVEY, D GEARHART, R GOMEZ, J GRENIER, PO GRIFFIOEN, KA HOIBRATEN, S HUGHES, EW HYDEWRIGHT, C JOHNSON, JR KAWALL, D KLEIN, A KUHN, SE KURIKI, M LINDGREN, R LIU, T LOMBARDNELSEN, RM MARRONCLE, J MARUYAMA, T MARUYAMA, XK MCCARTHY, J MEYER, W MEZIANI, ZE MINEHART, R MITCHELL, J MORGENSTERN, J PETRATOS, GG PITTHAN, R POCANIC, D PRESCOTT, C PREPOST, R RAINES, P RAUE, B REYNA, D RIJLLART, A ROBLIN, Y ROCHESTER, LS ROCK, SE RONDON, OA SICK, I SMITH, LC SMITH, TB SPENGOS, M STALEY, F STEINER, P STLORANT, S STUART, LM SUEKANE, F SZALATA, ZM TANG, H TERRIEN, Y USHER, T WALZ, D WHITE, JL WITTE, K YOUNG, CC YOUNGMAN, B YUTA, H ZAPALAC, G ZIHLMANN, B ZIMMERMANN, D TI PRECISION-MEASUREMENT OF THE DEUTERON SPIN STRUCTURE-FUNCTION G(1)(D) SO PHYSICAL REVIEW LETTERS LA English DT Article ID INELASTIC E-P; SCATTERING CROSS-SECTIONS; BJORKEN SUM-RULE; POLARIZED PROTONS; GLOBAL ANALYSIS; ELECTROPRODUCTION; ASYMMETRY; EXCHANGE; LEPTONS C1 AMERICAN UNIV,WASHINGTON,DC 20016. UNIV BASEL,INST PHYS,CH-4056 BASEL,SWITZERLAND. UNIV CLERMONT FERRAND,PHYS CORPUSCULAIRE LAB,CNRS,IN2P3,F-63170 CLERMONT FERRAND,FRANCE. CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL CTR,NEWPORT NEWS,VA 23606. CTR ETUD SACLAY,SERV PHYS NUCL,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV MASSACHUSETTS,AMHERST,MA 01003. UNIV MICHIGAN,ANN ARBOR,MI 48109. USN,POSTGRAD SCH,MONTEREY,CA 93943. OLD DOMINION UNIV,NORFOLK,VA 23529. UNIV PENN,PHILADELPHIA,PA 19104. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. STANFORD UNIV,STANFORD,CA 94305. TEMPLE UNIV,PHILADELPHIA,PA 19122. UNIV VIRGINIA,CHARLOTTESVILLE,VA 22901. UNIV WISCONSIN,MADISON,WI 53706. UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV BONN,D-53313 BONN,GERMANY. RP ABE, K (reprint author), TOHOKU UNIV,SENDAI,MIYAGI 980,JAPAN. RI Averett, Todd/A-2969-2011; Rondon Aramayo, Oscar/B-5880-2013; Frlez, Emil/B-6487-2013; Day, Donal/C-5020-2015 OI Day, Donal/0000-0001-7126-8934 NR 44 TC 260 Z9 260 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 JUL 3 PY 1995 VL 75 IS 1 BP 25 EP 28 DI 10.1103/PhysRevLett.75.25 PG 4 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000007 ER PT J AU KOURI, DJ HUANG, YH HOFFMAN, DK AF KOURI, DJ HUANG, YH HOFFMAN, DK TI ITERATED REAL-TIME PATH-INTEGRAL EVALUATION USING A DISTRIBUTED APPROXIMATING FUNCTIONAL PROPAGATOR AND AVERAGE-CASE COMPLEXITY INTEGRATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID POTENTIAL-ENERGY SURFACE; MONTE-CARLO EVALUATION; QUANTUM DYNAMICS; SYSTEMS; H-3 C1 UNIV HOUSTON, DEPT PHYS, HOUSTON, TX 77204 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RP UNIV HOUSTON, DEPT CHEM, UNIV PK, HOUSTON, TX 77204 USA. NR 46 TC 23 Z9 23 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 3 PY 1995 VL 75 IS 1 BP 49 EP 52 DI 10.1103/PhysRevLett.75.49 PG 4 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000013 ER PT J AU ACEVES, AB LUTHER, GG DEANGELIS, C RUBENCHIK, AM TURITSYN, SK AF ACEVES, AB LUTHER, GG DEANGELIS, C RUBENCHIK, AM TURITSYN, SK TI ENERGY LOCALIZATION IN NONLINEAR FIBER ARRAYS - COLLAPSE-EFFECT COMPRESSOR SO PHYSICAL REVIEW LETTERS LA English DT Article ID COUPLERS; SOLITONS; WAVE C1 UNIV PADUA, DIPARTIMENTO ELETTRON & INFORMAT, I-35131 PADUA, ITALY. LAWRENCE LIVERMORE NATL LAB, PLASMA PHYS RES INST, LIVERMORE, CA 94550 USA. UNIV DUSSELDORF, INST THEORET PHYS 1, D-40225 DUSSELDORF, GERMANY. RP UNIV NEW MEXICO, DEPT MATH & STAT, ALBUQUERQUE, NM 87131 USA. RI De Angelis, Costantino/F-7720-2010; Turitsyn, Sergei/J-5562-2013 OI De Angelis, Costantino/0000-0001-8029-179X; Turitsyn, Sergei/0000-0003-0101-3834 NR 24 TC 105 Z9 106 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 3 PY 1995 VL 75 IS 1 BP 73 EP 76 DI 10.1103/PhysRevLett.75.73 PG 4 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000019 ER PT J AU EFTHIMION, PC JOHNSON, LC STRACHAN, JD SYNAKOWSKI, EJ ZARNSTORFF, M ADLER, H BARNES, C BUDNY, RV JOBES, FC LOUGLIN, M MCCUNE, D MUELLER, D RAMSEY, AT REWOLDT, G ROQUEMORE, AL TANG, WM TAYLOR, G AF EFTHIMION, PC JOHNSON, LC STRACHAN, JD SYNAKOWSKI, EJ ZARNSTORFF, M ADLER, H BARNES, C BUDNY, RV JOBES, FC LOUGLIN, M MCCUNE, D MUELLER, D RAMSEY, AT REWOLDT, G ROQUEMORE, AL TANG, WM TAYLOR, G TI TRITIUM PARTICLE-TRANSPORT EXPERIMENTS ON TFTR DURING D-T OPERATION SO PHYSICAL REVIEW LETTERS LA English DT Article ID PROFILE MEASUREMENTS; NEUTRON EMISSION; ENERGY-TRANSPORT; TOKAMAK; HELIUM; IRON; JET C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP EFTHIMION, PC (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 28 TC 21 Z9 21 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 3 PY 1995 VL 75 IS 1 BP 85 EP 88 DI 10.1103/PhysRevLett.75.85 PG 4 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000022 ER PT J AU DEBOISSIEU, M BOUDARD, M HENNION, B BELLISSENT, R KYCIA, S GOLDMAN, A JANOT, C AUDIER, M AF DEBOISSIEU, M BOUDARD, M HENNION, B BELLISSENT, R KYCIA, S GOLDMAN, A JANOT, C AUDIER, M TI DIFFUSE-SCATTERING AND PHASON ELASTICITY IN THE ALPDMN ICOSAHEDRAL PHASE SO PHYSICAL REVIEW LETTERS LA English DT Article ID AL-PD-MN; ALFECU QUASI-CRYSTALS; QUASICRYSTALS; ALLOYS; CU; DIFFRACTION; DISORDER; SYSTEM; ORDER C1 CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE 9,FRANCE. RP DEBOISSIEU, M (reprint author), ECOLE NATL SUPER ELECTR & ELECTROMECAN GRENOBLE,THERMODYNAM & PHYSICOCHIM MET LAB,CNRS,UA 29,F-38402 ST MARTIN DHERES,FRANCE. NR 36 TC 126 Z9 126 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 3 PY 1995 VL 75 IS 1 BP 89 EP 92 DI 10.1103/PhysRevLett.75.89 PG 4 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000023 ER PT J AU JESSON, DE CHISHOLM, MF PENNYCOOK, SJ BARIBEAU, JM AF JESSON, DE CHISHOLM, MF PENNYCOOK, SJ BARIBEAU, JM TI ORDERED STRUCTURES AT SI ON GE(001) INTERFACES SO PHYSICAL REVIEW LETTERS LA English DT Note ID SUPERLATTICES C1 NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA,ON K1A 0R6,CANADA. RP JESSON, DE (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. OI Jesson, David/0000-0003-0897-1445 NR 5 TC 9 Z9 9 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD JUL 3 PY 1995 VL 75 IS 1 BP 184 EP 184 DI 10.1103/PhysRevLett.75.184 PG 1 WC Physics, Multidisciplinary SC Physics GA RF700 UT WOS:A1995RF70000047 ER PT J AU TEBBS, RS ZHAO, Y TUCKER, JD SCHEERER, JB SICILIANO, MJ HWANG, M LIU, N LEGERSKI, RJ THOMPSON, LH AF TEBBS, RS ZHAO, Y TUCKER, JD SCHEERER, JB SICILIANO, MJ HWANG, M LIU, N LEGERSKI, RJ THOMPSON, LH TI CORRECTION OF CHROMOSOMAL INSTABILITY AND SENSITIVITY TO DIVERSE MUTAGENS BY A CLONED CDNA OF THE XRCC3 DNA-REPAIR GENE SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE IRS1SF; CROSS-LINKING AGENTS; GENETIC COMPLEMENTATION; CHROMOSOMAL ABERRATIONS ID NUCLEOTIDE-EXCISION-REPAIR; CROSS-LINKING AGENTS; XERODERMA-PIGMENTOSUM; IONIZING-RADIATION; MOLECULAR-CLONING; HAMSTER MUTANTS; HYBRID-CELLS; DEFICIENT; ANEMIA; YEAST AB The mutagen-sensitive CHO line irs1SF was previously isolated on the basis of hypersensitivity to ionizing radiation and was found to be chromosomally unstable as well as cross-sensitive to diverse kinds of DNA-damaging agents. The analysis of somatic cell hybrids formed between irs1SF and human lymphocytes implicated a human gene (defined as XRCC3; x-ray repair cross-complementing), which partially restored mitomycin C resistance to the mutant. A functional cDNA that confers mitomycin C resistance was transferred to irs1SF cells by transforming them with an expression cDNA library and obtaining primary and secondary transformants. Functional cDNA clones were recovered from a cosmid library prepared from a secondary transformant. Transformants also showed partial correction of sensitivity to cisplatin and gamma-rays, efficient correction of chromosomal instability, and substantially improved plating efficiency and growth rate. The XRCC3 cDNA insert is approximate to 2.5 kb and detects an approximate to 3.0-kb mRNA on Northern blots, The cDNA was mapped by fluorescence in situ hybridization to human chromosome 14q32.3, which was consistent with the chromosome concordance data of two independent hybrid clone panels. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. UNIV TEXAS,CTR CANC,DEPT MOLEC GENET,HOUSTON,TX 77030. FU NCI NIH HHS [CA52461, CA34936]; NIGMS NIH HHS [GM32833] NR 30 TC 206 Z9 214 U1 0 U2 2 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 JUL 3 PY 1995 VL 92 IS 14 BP 6354 EP 6358 DI 10.1073/pnas.92.14.6354 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RG736 UT WOS:A1995RG73600029 PM 7603995 ER PT J AU RINCHIK, EM CARPENTER, DA HANDEL, MA AF RINCHIK, EM CARPENTER, DA HANDEL, MA TI PLEIOTROPY IN MICRODELETION SYNDROMES - NEUROLOGIC AND SPERMATOGENIC ABNORMALITIES IN MICE HOMOZYGOUS FOR THE P(6H) DELETION ARE LIKELY DUE TO DYSFUNCTION OF A SINGLE-GENE SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID LETHAL ALBINO DELETIONS; EYED DILUTION LOCUS; PRADER-WILLI; MOUSE CHROMOSOME-7; ANGELMAN SYNDROMES; RECEPTOR; MUTATION; REGION; MODEL; LIVER AB Variability and complexity of phenotypes observed in microdeletion syndromes can be due to deletion of a single gene whose product participates in several aspects of development or can be due to the deletion of a number of tightly linked genes, each adding its own effect to the syndrome. The p(6H) deletion in mouse chromosome 7 presents a good model with which to address this question of multigene vs. single-gene pleiotropy. Mice homozygous for the p(6H) deletion are diluted in pigmentation, are smaller than their littermates, and manifest a nervous jerk-gait phenotype. Male homozygotes are sterile and exhibit profound abnormalities in spermiogenesis, By using N-ethyl-N-nitrosourea (EtNU) mutagenesis and a breeding protocol designed to recover recessive mutations expressed hemizygously opposite a large p-locus deletion, we have generated three noncomplementing mutations that map to the p(6H) deletion, Each of these EtNU-induced mutations has adverse effects on the size, nervous behavior, and progression of spermiogenesis that characterize P-6H deletion homozygotes. Because EtNU is thought to induce primarily intragenic (point) mutations in mouse stem-cell spermatogonia, we propose that the trio of phenotypes (runtiness, nervous jerky gait, and male sterility) expressed in p(6H) deletion homozygotes is the result of deletion of a single highly pleiotropic gene, We also predict that a homologous single locus, quite possibly tightly linked and distal to the D15S12 (P) locus in human chromosome 15q11q13, may be associated with similar developmental abnormalities in humans. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT ZOOL,KNOXVILLE,TN 37996. FU NHGRI NIH HHS [HG 00370] NR 29 TC 29 Z9 29 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 JUL 3 PY 1995 VL 92 IS 14 BP 6394 EP 6398 DI 10.1073/pnas.92.14.6394 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA RG736 UT WOS:A1995RG73600037 PM 7604002 ER PT J AU ZHELUDEV, A PAPOULAR, RJ RESSOUCHE, E SCHWEIZER, J AF ZHELUDEV, A PAPOULAR, RJ RESSOUCHE, E SCHWEIZER, J TI NONUNIFORM REFERENCE MODEL FOR MAXIMUM-ENTROPY DENSITY RECONSTRUCTIONS FROM DIFFRACTION DATA SO ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES LA English DT Article ID ELECTRON-DENSITY AB Diffraction experiments provide information on the Fourier components of microscopic density distributions in crystals. To obtain the spatial densities themselves, an inverse Fourier problem has to be solved. The procedure is complicated by the presence of noise and incompleteness of the data. The application of the maximum-entropy (MaxEnt) principle was a breakthrough in density reconstruction, allowing high-quality density maps to be obtained without involving any a priori information concerning what the reconstructed density should look like. In this work, a procedure is proposed that incorporates a priori (e.g. theoretical) information into MaxEnt reconstructions of spin density distributions. It allows, on the one hand, the evaluation of the existing density models and, on the other, the precise investigation of what new information the experiment brings. Unlike traditional parameter-refinement techniques, the new method does not impose any strict constraints on the density to be reconstructed and is thus much more flexible. At the same time, it suppresses artifacts and yields high-quality density maps. The advantages of the new methods are illustrated by an example of spin density reconstruction based on real polarized neutron diffraction data. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. CENS, CEA, CNRS, COMMUN LAB, F-91191 GIF SUR YVETTE, FRANCE. RP CEA, DEPT RECH FONDAMENTALE MAT CONDENSEE, SPSMS, MDN, 17 RUE MARTYRS, F-38054 GRENOBLE 9, FRANCE. NR 24 TC 18 Z9 18 U1 0 U2 1 PU INT UNION CRYSTALLOGRAPHY PI CHESTER PA 2 ABBEY SQ, CHESTER, CH1 2HU, ENGLAND SN 2053-2733 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD JUL 1 PY 1995 VL 51 BP 450 EP 455 DI 10.1107/S0108767394010883 PN 4 PG 6 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA RL267 UT WOS:A1995RL26700002 ER PT J AU KAMPERMANN, SP SABINE, TM CRAVEN, BM MCMULLAN, RK AF KAMPERMANN, SP SABINE, TM CRAVEN, BM MCMULLAN, RK TI HEXAMETHYLENETETRAMINE - EXTINCTION AND THERMAL VIBRATIONS FROM NEUTRON-DIFFRACTION AT 6 TEMPERATURES SO ACTA CRYSTALLOGRAPHICA SECTION A LA English DT Article AB Neutron diffraction data have been collected for hexamethylenetetramine (HMT) at 15, 50, 80, 120, 160 and 200K using a single crystal (mass 8.1 mg). The structure refinement at each temperature included two extinction parameters and third-order thermal parameters for the H nuclei. Extinction effects are very severe with extinction factors as small as 0.2F(kin)(2) for three reflections (800, 110 and 440). Application of the Sabine extinction theory indicates that the crystal domain size decreases from 115 mu m at 200 K to 85 mu m at 15 K. The half-width in the mosaic spread (7'' of arc) is almost independent of temperature. An extinction model without phase correlations between mosaic blocks gives a slightly better fit to the diffraction data. The nuclear mean square thermal displacements have been analysed assuming no coupling between the external (rigid body) and internal vibrations. This gives mean square displacements for rigid-body vibration in which zero-point vibrational effects are apparent. The methylene H nuclei have internal vibrations approximately independent of temperature. At 200 K, the H nuclear vibrations have a small anharmonic component, but at temperatures below 160K this becomes insignificant in terms of the experimental error. C1 UNIV PITTSBURGH,DEPT CRYSTALLOG,PITTSBURGH,PA 15260. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. AUSTRALIAN NUCL SCI & TECHNOL ORG,SUTHERLAND,NSW,AUSTRALIA. FU NHLBI NIH HHS [HL-20350]; NIGMS NIH HHS [GM-22548] NR 37 TC 35 Z9 35 U1 0 U2 2 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7673 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD JUL 1 PY 1995 VL 51 BP 489 EP 497 DI 10.1107/S0108767394013711 PN 4 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA RL267 UT WOS:A1995RL26700007 PM 7632379 ER PT J AU ELKABBANI, O JUDGE, K GINELL, SL DELUCAS, LJ FLYNN, TG AF ELKABBANI, O JUDGE, K GINELL, SL DELUCAS, LJ FLYNN, TG TI CRYSTALLIZATION AND PRELIMINARY STRUCTURE OF PORCINE ALDEHYDE REDUCTASE NADPH BINARY COMPLEX SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article; Proceedings Paper CT Structure-Based Drug Design Conference CY APR 22-25, 1994 CL PANAMA CITY BEACH, FL ID ALDOSE REDUCTASE; DIABETIC COMPLICATIONS; CRYSTAL-STRUCTURE; MACROMOLECULES AB Porcine aldehyde reductase-NADPH binary complex has been crystallized from a buffered ammonium sulfate solution. The crystal form is hexagonal, space group P6(5)22, with a = b = 67.2, c = 243.7 Angstrom, alpha = beta = 90.0 and gamma = 120.0 degrees. A molecular-replacement structure solution has been successfully obtained by using the refined structure of the apoenzyme as the search model. The crystallographic R factor is currently equal to 0.24 after energy minimization using data between 8 and 3.0 Angstrom resolution. The aldehyde reductase-NADPH complex model is supported by electron density corresponding to NADPH not included in the search model. The tertiary structure of aldehyde reductase consists of a beta/alpha-barrel with the coenzyme-binding site located at the carboxy-terminal end of the strands of the barrel. The structure of aldehyde reductase-NADPH binary complex will help clarify the mechanism of action for this enzyme and will lead to the development of pharmacologic agents to delay or prevent diabetic complications. C1 BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,ARGONNE NATL LAB,CTR STRUCT BIOL,UPTON,NY 11973. QUEENS UNIV,DEPT BIOCHEM,KINGSTON,ON K7L 3N6,CANADA. RP ELKABBANI, O (reprint author), UNIV ALABAMA,CTR MACROMOLEC CRYSTALLOG,BIRMINGHAM,AL 35294, USA. NR 17 TC 2 Z9 2 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD JUL 1 PY 1995 VL 51 BP 605 EP 608 DI 10.1107/S0907444994013995 PN 4 PG 4 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA RP971 UT WOS:A1995RP97100022 PM 15299849 ER PT J AU ROSEN, GI JENSEN, DJ HUGHES, DA HANSEN, N AF ROSEN, GI JENSEN, DJ HUGHES, DA HANSEN, N TI MICROSTRUCTURE AND LOCAL CRYSTALLOGRAPHY OF COLD-ROLLED ALUMINUM SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID ENERGY DISLOCATION-STRUCTURES; DEFORMATION MICROSTRUCTURES; TRANSMISSION KOSSEL; LARGE STRAINS; RECRYSTALLIZATION; EVOLUTION; DIFFRACTION; TEXTURE; NICKEL AB High-purity aluminium (99.996%) has been deformed by cold-rolling to intermediate reductions (50 and 60%). The microstructure has been characterized using transmission electron microscopy (TEM) and the local crystallographic orientations have been analysed by convergent beam electron diffraction (CBED) using a semi-automatic technique. A number of dislocation configurations such as microbands (MBs), S-bands and lamellar boundaries (LBs) have been characterized in terms of crystallographic and macroscopic orientations and morphology. For a large number of dislocation boundaries, the angle/axis pairs have been calculated and classified. The microstructural and crystallographic information is combined into orientation images which are related to a framework for the microstructural evolution common to medium and high stacking fault energy f.c.c. polycrystals. This framework consists of a grain subdivision by dislocation boundaries and it is discussed how these boundaries evolve especially how intragranular high angle boundaries can form. The effect of annealing on the deformation microstructure and intragranular nucleation is finally discussed. C1 RISO NATL LAB, DEPT MAT, DK-4000 ROSKILDE, DENMARK. SANDIA NATL LABS, DEPT MAT & PROC RES, LIVERMORE, CA 94550 USA. NR 42 TC 56 Z9 56 U1 0 U2 13 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 JUL PY 1995 VL 43 IS 7 BP 2563 EP 2579 DI 10.1016/0956-7151(94)00473-U PG 17 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA RF075 UT WOS:A1995RF07500005 ER PT J AU SCHLUETER, JA WILLIAMS, JM GEISER, U DUDEK, JD KELLY, ME SIRCHIO, SA CARLSON, KD NAUMANN, D ROY, T CAMPANA, CF AF SCHLUETER, JA WILLIAMS, JM GEISER, U DUDEK, JD KELLY, ME SIRCHIO, SA CARLSON, KD NAUMANN, D ROY, T CAMPANA, CF TI 7 NEW ORGANIC SUPERCONDUCTORS IN THE SYSTEM (ET)(2)M(CF3)(4)(SOLVENT) (M=CU, AG) - EFFECT OF SOLVENT REPLACEMENT SO ADVANCED MATERIALS LA English DT Article ID COMPLEX ANIONS; CRYSTAL; SALTS AB Communication: Superconductivity in kappa-phase organic charge transfer salts and its relation to structural differences caused by the solvent present is analyzed on the basis of seven new superconductors in the BEDT-TTF system. The superconducting salts have T(c)s between 2.6 and 11.1 K. The electrocrystallization of the new materials is described and the structure-property relationships discussed. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. UNIV COLOGNE,INST ANORGAN CHEM,D-50939 COLOGNE,GERMANY. SIEMENS IND AUTOMAT INC,MADISON,WI 53719. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. OI Campana, Charles/0000-0002-0495-0922 NR 17 TC 37 Z9 37 U1 0 U2 1 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD JUL PY 1995 VL 7 IS 7 BP 634 EP 639 DI 10.1002/adma.19950070705 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA RJ498 UT WOS:A1995RJ49800003 ER PT J AU ZHANG, XG BASARAN, OA WHAM, RM AF ZHANG, XG BASARAN, OA WHAM, RM TI THEORETICAL PREDICTION OF ELECTRIC FIELD-ENHANCED COALESCENCE OF SPHERICAL DROPS SO AICHE JOURNAL LA English DT Article ID THERMOCAPILLARY MOTION; COLLISIONS; GROWTH AB A fundamental study of drop collision, coalescence and growth induced by combined effects of gravitational and electrostatic forces is presented. The focus is on the enhancement of rates of collision and growth of spherical, conducting drops bearing zero net charge in dilute, homogeneous dispersions by an external electric field. By completely accounting for hydrodynamic and electrostatic interactions, a trajectory analysis is used to follow the relative motion of two drops and predict pairwise collision and coalescence rates. A population dynamics equation is then solved to predict the evolution in time of the size distribution and the average size of drops. The results show that the rates of drop collision and growth can be increased significantly by applying an electric field, in accord with fundamental experiments and patents on electrocoalescence. The enhancement of drop collision and coalescence is especially pronounced when the imposed electric field acts horizontally, that is, in a direction perpendicular to gravity. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996. NR 29 TC 27 Z9 27 U1 0 U2 4 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 JUL PY 1995 VL 41 IS 7 BP 1629 EP 1639 DI 10.1002/aic.690410704 PG 11 WC Engineering, Chemical SC Engineering GA RH246 UT WOS:A1995RH24600003 ER PT J AU LAVOIE, JP PASCOE, JR KUPERSHOEK, CJ AF LAVOIE, JP PASCOE, JR KUPERSHOEK, CJ TI PARTITIONING OF TOTAL PULMONARY RESISTANCE IN HORSES SO AMERICAN JOURNAL OF VETERINARY RESEARCH LA English DT Article ID UPPER AIRWAY-RESISTANCE; RESPIRATORY MECHANICS; POSITION; VOLUME; PONIES; HEAD AB The partitioning of total pulmonary resistance (RL) into upper airway resistance and lower airway resistance (R1) was studied in 8 Thoroughbred geldings. In addition, the phase shift and amplitude distortion of 3 catheters used for pressure measurements in this study were evaluated under static and dynamic conditions. Flow rate was obtained from a heated pneumotachograph attached to a tight-fitting mask placed over the nose. Electronic integration of the flow signal gave tidal volume. Transpulmonary pressure (PL) was obtained from calculation of the difference between the esophageal balloon catheter pressure and mask pressure. Lateral tracheal pressure was measured from a polyethylene catheter placed percutaneously in the middle portion of the trachea. Lower airway pressure (PL) was calculated as the difference between esophageal pressure and lateral tracheal pressure. Similarly, upper airway pressure was defined as the difference between lateral tracheal pressure and mask pressure. Pressures are reported as the difference between the maximal and the minimal pressures recorded during a respiratory cycle. Airway resistance was calculated, using the isovolume method, at 50% of tidal volume. There were individual and group variations in P1 and P1/PL, although P1 accounted for more than 60% of PL in all horses. In 6 horses, RI was more than 50% of RL whereas in 2 horses, RI was only 30 and 34% of RL. Amplitude distortion was minimal for the 3 catheters under static conditions in the in vitro study. Under dynamic conditions, amplitude distortion varied according to the catheter studied, the frequency, and the resistance of the system. There were no phase differences under static conditions at low frequency. However, phase discrepancy, which was variable through the cycle, was observed for some catheters at high frequency under static and dynamic conditions. It was concluded that, until measuring techniques are standardized in horses, variations in the partitioning of RL are likely to be obtained between studies and between animals within studies. C1 LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT SURG,DAVIS,CA 95616. RP LAVOIE, JP (reprint author), UNIV MONTREAL,FAC MED VET,DEPT SCI CLIN,ST HYACINTHE,PQ J2S 7C6,CANADA. RI Lavoie, Jean-Pierre/H-9201-2013 NR 23 TC 6 Z9 6 U1 0 U2 1 PU AMER VETERINARY MEDICAL ASSOC PI SCHAUMBURG PA 1931 N MEACHAM RD, SCHAUMBURG, IL 60173-4360 SN 0002-9645 J9 AM J VET RES JI Am. J. Vet. Res. PD JUL PY 1995 VL 56 IS 7 BP 924 EP 929 PG 6 WC Veterinary Sciences SC Veterinary Sciences GA RJ860 UT WOS:A1995RJ86000015 PM 7574162 ER PT J AU KOETSIER, P BRYAN, CF AF KOETSIER, P BRYAN, CF TI EFFECTS OF ABIOTIC FACTORS ON MACROINVERTEBRATE DRIFT IN THE LOWER MISSISSIPPI RIVER, LOUISIANA SO AMERICAN MIDLAND NATURALIST LA English DT Article ID INVERTEBRATE DRIFT; STREAM DRIFT; PREDATION; ACIDIFICATION; PERIODICITY; DISTURBANCE; STONEFLIES; MAYFLIES; PATTERNS; INSECTS AB We assessed the effects of abiotic factors on invertebrate drift composition in the lower Mississippi River from November 1984 to June 1985. We sampled drift, measured in situ water quality variables and recorded river stage and discharge 1 night each month. Principal component analysis (PCA) and standard multiple regression were used to investigate temporal relationships between drift and abiotic factors in a large river system. Several drifting taxa (Ephemeroptera, Trichoptera) were significantly, negatively related to discharge and positively related to temperature, current and conductivity. In separate analyses, collector, engulfing predator and detritivore feeding groups were significantly, positively related to stage/discharge and negatively related to current velocity. In addition, each trophic component had several prey and one predator highly correlated with it. Seasonal variability in drift was a response to both invertebrate predation and fluctuations in the hydrologic cycle. Our study could not distinguish between two main effects of river discharge on drift: dilution and habitat availability. The possibility that drift may be a separate community apart from the benthos, and thereby affected strongly by seasonal abiotic factors, is discussed. C1 LOUISIANA STATE UNIV,US NATL BIOL SERV,COOPERAT FISHERIES & WILDLIFE RES UNIT,BATON ROUGE,LA 70803. RP KOETSIER, P (reprint author), SAVANNAH RIVER ECOL LAB,DIV WETLAND ECOL,DRAWER E,AIKEN,SC 29802, USA. NR 56 TC 8 Z9 8 U1 0 U2 5 PU AMER MIDLAND NATURALIST PI NOTRE DAME PA UNIV NOTRE DAME, NOTRE DAME, IN 46556 SN 0003-0031 J9 AM MIDL NAT JI Am. Midl. Nat. PD JUL PY 1995 VL 134 IS 1 BP 63 EP 74 DI 10.2307/2426483 PG 12 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA RN004 UT WOS:A1995RN00400005 ER PT J AU POIANI, KA DIXON, PM AF POIANI, KA DIXON, PM TI SEED BANKS OF CAROLINA BAYS - POTENTIAL CONTRIBUTIONS FROM SURROUNDING LANDSCAPE VEGETATION SO AMERICAN MIDLAND NATURALIST LA English DT Article ID PRAIRIE GLACIAL MARSHES; WATER TIDAL WETLAND; EMERGENCE; DYNAMICS; FOREST; LAKE; ONTARIO AB We used the seedling emergence method to evaluate the influence of the dominant vegetation (herbaceous, shrubby forested) and the surrounding landscape on seed bank composition in seven Carolina bays. Landscape influence was evaluated indirectly by determining whether seed banks in wetlands close to clearcuts had more upland weedy species than those farther from clearcuts. Seed bank species composition and richness differed among forested, shrubby and herbaceous bays. DECORANA ordination identified a gradient of species composition from herbaceous bays, to shrubby bays, to forested bays. Bays near clearcuts had significantly more upland weedy species in their seed banks, with bays 20 m from clearcuts containing 79% more weedy species on average than bays 100 m from clearcuts. Within a bay, drier vegetation zones had 2.4 times more weedy species than did deep water zones. These results illustrate the potential contributions from surrounding landscape units to bay seed banks and highlight the need for further studies directly assessing the impact of adjacent clearcuts on bay vegetation dynamics. C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. RP POIANI, KA (reprint author), CORNELL UNIV,CTR ENVIRONM,624 BRADFIELD HALL,ITHACA,NY 14853, USA. NR 46 TC 27 Z9 28 U1 2 U2 5 PU AMER MIDLAND NATURALIST PI NOTRE DAME PA UNIV NOTRE DAME, NOTRE DAME, IN 46556 SN 0003-0031 J9 AM MIDL NAT JI Am. Midl. Nat. PD JUL PY 1995 VL 134 IS 1 BP 140 EP 154 DI 10.2307/2426491 PG 15 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA RN004 UT WOS:A1995RN00400013 ER PT J AU GUTHRIE, GD BISH, DL REYNOLDS, RC AF GUTHRIE, GD BISH, DL REYNOLDS, RC TI MODELING THE X-RAY-DIFFRACTION PATTERN OF OPAL-CT SO AMERICAN MINERALOGIST LA English DT Letter AB X-ray diffraction patterns of opal-CT were modeled using a recursive calculation technique that allows for ordered and disordered intergrowths of planar units. The opal-CT structure was modeled as interstratifications of cristobalite and tridymite layers that were based on an idealized trigonal silica sheet, as found in the high-temperature structures. Modeled patterns matched observed patterns well, including the overall shapes of the broad peaks at similar to 19.5-24.5 degrees 2 theta and 35.9 degrees 2 theta (CuK alpha). The calculations allow several important interpretations of opal-CT: XRD patterns of opal-CT can be modeled by an interstratification of cristobalite and tridymite; both disordered and ordered interstratifications occur; particle size can be inferred from the width of the 35.9 degrees 2 theta peak; significant information regarding the structural state of opal is contained in weak, often-ignored bands (e.g., one at similar to 41-46 degrees 2 theta); and H2O is not present in an ordered fashion within the cristobalite and tridymite sheets. C1 DARTMOUTH COLL,DEPT EARTH SCI,HANOVER,NH 03755. RP GUTHRIE, GD (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 13 TC 41 Z9 42 U1 1 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 JUL-AUG PY 1995 VL 80 IS 7-8 BP 869 EP 872 PG 4 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA RN609 UT WOS:A1995RN60900030 ER PT J AU KASS, DH BATZER, MA AF KASS, DH BATZER, MA TI INTER-ALU POLYMERASE CHAIN-REACTION - ADVANCEMENTS AND APPLICATIONS SO ANALYTICAL BIOCHEMISTRY LA English DT Review ID SOMATIC-CELL HYBRIDS; ELEMENT-MEDIATED PCR; FLUORESCENCE INSITU HYBRIDIZATION; YEAST ARTIFICIAL CHROMOSOMES; RAPID ISOLATION; HUMAN GENOME; DNA PROBES; POLYMORPHIC MARKERS; REPEATED SEQUENCES; FAMILY MEMBERS C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. RP KASS, DH (reprint author), LOUISIANA STATE UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,1901 PERDIDO ST,NEW ORLEANS,LA 70112, USA. NR 65 TC 20 Z9 20 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD JUL 1 PY 1995 VL 228 IS 2 BP 185 EP 193 DI 10.1006/abio.1995.1338 PG 9 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RH245 UT WOS:A1995RH24500001 PM 8572294 ER PT J AU FUNG, EN YEUNG, ES AF FUNG, EN YEUNG, ES TI HIGH-SPEED DNA-SEQUENCING BY USING MIXED POLY(ETHYLENE OXIDE) SOLUTIONS IN UNCOATED CAPILLARY COLUMNS SO ANALYTICAL CHEMISTRY LA English DT Article ID LASER-INDUCED FLUORESCENCE; GEL-FILLED CAPILLARIES; ULTRATHIN SLAB GELS; ZONE ELECTROPHORESIS; RESTRICTION FRAGMENTS; POLYACRYLAMIDE; SEPARATIONS; RESOLUTION; POLYMERS AB We describe a new non-cross-linked polymer matrix and a new column treatment procedure for high-speed DNA sequencing by using capillary electrophoresis. A solution of commercially available poly(ethylene oxide) (PEO) in two size ranges is used as the sieving matrix under denaturing conditions. When compared to a commercial 6% T polyacrylamide solution, the mixed PEO matrix offers identical separation performance for the small DNA fragments, better performance for the large DNA fragments, increased separation speed, and a lower viscosity. To avoid degradation of the standard bonded coating on the capillary column over many runs, we evaluated the resolution of DNA fragments in the mixed PEO matrix in bare fused-silica capillaries, in a dry, fresh column, the performance is identical to that observed in coated (bonded) capillaries. To regenerate the favorable surface characteristics after each run, 0.1 N HCl was used to retitrate the surface silanol groups back to the fully protonated form. The sequencing runs in fact proceeded much faster, with bases 28-420 from the Sanger ladder eluting in a span of only 16 min, We observed little degradation of the performance over tens of sequencing runs. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP FUNG, EN (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 37 TC 224 Z9 231 U1 2 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 1913 EP 1919 DI 10.1021/ac00109a002 PG 7 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200007 ER PT J AU CLEMONS, PS MINNICH, MG HOUK, RS AF CLEMONS, PS MINNICH, MG HOUK, RS TI ATTENUATION OF METAL-OXIDE IONS IN INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY WITH A GRAPHITE TORCH INJECTOR SO ANALYTICAL CHEMISTRY LA English DT Article ID DIRECT SAMPLE INSERTION; ATOMIC EMISSION-SPECTROMETRY; ELECTROTHERMAL VAPORIZATION; CRYOGENIC DESOLVATION; CHEMICAL MODIFIERS; MOLECULAR GASES; ARGON PLASMA; INTERFERENCES; DEVICE; REDUCTION AB Desolvated solution aerosols are injected into the axial channel of an inductively coupled plasma through a graphite tube inserted directly into the plasma. This hot injector constricts the stream of analyte and prevents it from widening excessively as it travels through the plasma. Thus, the sampling orifice for the mass spectrometer can be positioned several millimeters downstream from the tip of the initial radiation zone without substantial loss of analyte ion signal. The signal ratio for LaO+/La+ can be reduced to 0.05% with conventional desolvation or 0.01% with cryogenic desolvation under operating conditions that yield maximum metal ion signal. These values are greatly superior to those obtained with conventional torch injectors. The graphite injector also improves sensitivity for atomic ions by factors of 1.5-15, with the best improvements seen for elements such as As and Zn that have high ionization energies. This modification to the plasma does not compromise other analytical figures of merit such as rinse-out time or the suitability of a single set of operating conditions for multielement analysis. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT CHEM,AMES,IA 50011. NR 51 TC 9 Z9 9 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 1929 EP 1934 DI 10.1021/ac00109a004 PG 6 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200009 ER PT J AU GROENEWOLD, GS INGRAM, JC APPELHANS, AD DELMORE, JE PESIC, B AF GROENEWOLD, GS INGRAM, JC APPELHANS, AD DELMORE, JE PESIC, B TI STATIC SIMS DETECTION OF GOLD AND GOLD CYANIDE COMPLEXES ON CARBON USING CROWN-ETHER ENHANCEMENT SO ANALYTICAL CHEMISTRY LA English DT Article ID AUROCYANIDE ION-PAIRS; FAST ATOM BOMBARDMENT; ACTIVATED CARBON; CATION COMPLEXES; POLYMERIC ADSORBENTS; MASS-SPECTROMETRY; GAS-PHASE; ADSORPTION; EXTRACTION; MODELS AB Determination of the nature of adsorbed gold cyanide species on activated carbon is difficult with presently available surface analysis techniques. Efforts toward the development of new, more specific analytical techniques are described in this paper. It is shown that static secondary ion mass spectrometry can be used for the detection of gold on carbon surfaces and for the identification of cyanide species present. The method described relies on two features: (1) the instrumentation employed utilizes pulsed secondary ion extraction, which mitigates the buildup of surface charge (a major problem in the bombardment of carbon) and permits the acquisition of the anion and cation spectra during the same analysis; (2) the surface of the carbon samples is doped with a crown ether, which results in the facile observation of Au(CN)2(-), [M + crown](+) (where M is Na+ or K+), and in some cases Au-. It is hypothesized that the crown ether facilitates the formation of gold cyanide ions by forming complexes with Na+ and K+ present on the surface of the charcoal, thereby loosening or freeing the Au(CN)2(-). C1 UNIV IDAHO,COLL MINES & EARTH RESOURCES,MOSCOW,ID 83843. RP GROENEWOLD, GS (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 26 TC 13 Z9 13 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 1987 EP 1991 DI 10.1021/ac00109a013 PG 5 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200018 ER PT J AU YAN, C DADOO, R ZHAO, H ZARE, RN RAKESTRAW, DJ AF YAN, C DADOO, R ZHAO, H ZARE, RN RAKESTRAW, DJ TI CAPILLARY ELECTROCHROMATOGRAPHY - ANALYSIS OF POLYCYCLIC AROMATIC-HYDROCARBONS SO ANALYTICAL CHEMISTRY LA English DT Article ID LIQUID-CHROMATOGRAPHY AB Electrochromatography is utilized to separate a mixture of 16 different polycyclic aromatic hydrocarbons (PAHs). Fused-silica capillary columns ranging in size from 50 to 150 mu m i.d. were packed (20-40-cm sections) with 3-mu m octadecylsilica particles. A potential of 15-30 kV is applied across the 30-50-cm total length capillary column to generate electroosmotic now that carries the PAHs through the stationary phase. An intracavity-doubled argon ion laser operating at 257 nm is used to detect the PAHs by laser-induced fluorescence. Efficiencies up to 400 000 theoretical plates/m are obtained when detection is performed within the column packing and up to 150 000 theoretical plates/m when detection is performed following a frit (used to hold the packing). The reproducibility of the peak retention times is better than 2% (RSD). The limits of detection for individual PAHs range between 10(-17) and 10(-20) mol(10(-9)-10(-11) M), With a linear response spanning 4 orders of magnitude in concentration. C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. SANDIA NATL LABS,LIVERMORE,CA 94551. RI Zare, Richard/A-8410-2009 NR 11 TC 224 Z9 242 U1 1 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 2026 EP 2029 DI 10.1021/ac00109a020 PG 4 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200025 ER PT J AU JACOBSON, SC MOORE, AW RAMSEY, JM AF JACOBSON, SC MOORE, AW RAMSEY, JM TI FUSED QUARTZ SUBSTRATES FOR MICROCHIP ELECTROPHORESIS SO ANALYTICAL CHEMISTRY LA English DT Article ID CAPILLARY ZONE ELECTROPHORESIS; HIGH-PERFORMANCE ELECTROPHORESIS; SAMPLE INJECTION; 8-HYDROXYQUINOLINE-5-SULFONIC ACID; CHIP; MINIATURIZATION; SYSTEMS AB A fused quartz microchip is fabricated to perform capillary electrophoresis of metal ions complexed with 8-hydroxy-quinoline-5-sulfonic acid (HQS). The channel manifold on the quartz substrate is fabricated using standard photolithographic, etching, and deposition techniques. By incorporating a direct bonding technique during the fabrication of the microchip, the substate and cover plate can be fused together below the melting temperature for fused quartz. To enhance the resolution for the separation, the electroosmotic flow is minimized by covalently bonding polyacrylamide to the channel walls. A separation length of 16.5 mm and separation field strength of 870 V/cm enable separations to be performed in less than or equal to 15 s. By increasing the concentration of HQS from 5 mM to 20 mM, the separation efficiency improves by similar to 3 times. The low background signal from the fused quartz substrate results in mass detection limits of 85, 61, and 134 amol and concentration detection limits of 46, 57, and 30 ppb for Zn, Cd, and Al, respectively. RP JACOBSON, SC (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Kipke, Daryl/A-2167-2009 NR 29 TC 170 Z9 170 U1 2 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 2059 EP 2063 DI 10.1021/ac00109a026 PG 5 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200031 ER PT J AU GRATE, JW PATRASH, SJ ABRAHAM, MH AF GRATE, JW PATRASH, SJ ABRAHAM, MH TI METHOD FOR ESTIMATING POLYMER-COATED ACOUSTIC-WAVE VAPOR SENSOR RESPONSES SO ANALYTICAL CHEMISTRY LA English DT Article ID REAL-TIME MEASUREMENT; PATTERN-RECOGNITION; PARTITION-COEFFICIENTS; PIEZOELECTRIC CRYSTAL; CHEMICAL SENSORS; QUARTZ CRYSTAL; ARRAY; GAS; COATINGS; DEVICES AB A method for estimating the responses of polymer-coated acoustic wave vapor sensors has been developed. Polymer/gas partition coefficients, determined experimentally for at least 20-30 solute vapors by a simple gas chromatographic method, are used to construct linear solvation energy relationships that correlate partition coefficients on a given polymer with various solute solvation parameters, Since these parameters are known for over 2000 compounds, it is possible to estimate polymer/gas partition coefficient values for thousands of vapor/polymer pairs. It is shown how these partition coefficients can, in turn, be used to estimate acoustic wave vapor sensor responses. Comparisons of predicted surface acoustic wave vapor sensor sensitivities with observed responses confirm the general validity of the approach. The approach can be used to select polymers offering the best sensitivities for particular vapors. Limits of detection have been calculated and compared with permissible exposure limits and threshold limit values for a variety of vapors of interest in environmental remediation and occupational safety. These results indicate that polymer-coated surface acoustic wave vapor sensors are capable of detecting the majority of the vapors considered at concentrations of interest. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. UCL, DEPT CHEM, LONDON WC1H 0AJ, ENGLAND. NR 49 TC 104 Z9 108 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 EI 1520-6882 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 2162 EP 2169 DI 10.1021/ac00109a040 PG 8 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200045 ER PT J AU YESINOWSKI, JP BUESS, ML GARROWAY, AN ZIEGEWEID, M PINES, A AF YESINOWSKI, JP BUESS, ML GARROWAY, AN ZIEGEWEID, M PINES, A TI DETECTION OF N-14 AND CL-35 IN COCAINE BASE AND HYDROCHLORIDE USING NQR, NMR, AND SQUID TECHNIQUES SO ANALYTICAL CHEMISTRY LA English DT Article ID NUCLEAR-QUADRUPOLE RESONANCE; RELAXATION MEASUREMENTS; AMINO-ACIDS; DC SQUID; SOLIDS; FIELD AB Results from N-14 pure NQR of cocaine in the free base form (cocaine base) yield a nuclear quadrupole coupling constant (NQCC) e(2)Qq/h of 5.0229 (+/-0.0001) MHz and an asymmetry parameter eta of 0.0395 (+/0.0001) at 295 K, with corresponding values of 5.0460 (+/-0.0013) MHz and 0.0353 (+/-0.000S) at 77 K. The NQR peaks of a sample of cocaine base containing similar to 1% impurities are a factor of 3 broader than those of a recrystallized sample, but spin-lattice and spin-spin relaxation times are essentially unchanged, Both pure NQR (at 295-77 K) and a superconducting quantum interference device (SQUID) detector (at 4.2 K) were used to measure the very low (<1 MHz) N-14 transition frequencies in cocaine hydrochloride; at 295 K the NQCC is 1.1780 (+/-0.0014) MHz and the asymmetry parameter is 0.2632 (+/-0.0034). Cocaine hydrochloride exhibits a broad Cl-35 pure NQR resonance at 2.53 MRz. The Cl-35 NMR spectrum at 7.0 T is that of a central 1/2 --> -1/2 transition greatly broadened by second-order quadrupolar effects. Stepping the carrier frequency enables one to obtain a powder pattern without the severe intensity distortions that otherwise arise from finite pulse power. A powder pattern simulation using an NQCC value of 5.027 MHz and an asymmetry parameter eta of 0.2 agrees reasonably well with the experimental stepped-frequency spectrum, The use of pure NQR for providing nondestructive, quantitative, and highly specific detection of crystalline compounds is discussed, as are experimental strategies. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. RP YESINOWSKI, JP (reprint author), USN,RES LAB,DIV CHEM,CODE 6122,WASHINGTON,DC 20375, USA. NR 37 TC 78 Z9 78 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP 2256 EP 2263 DI 10.1021/ac00109a053 PG 8 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200058 ER PT J AU BARNES, MD WHITTEN, WB RAMSEY, JM AF BARNES, MD WHITTEN, WB RAMSEY, JM TI DETECTING SINGLE MOLECULES IN LIQUIDS SO ANALYTICAL CHEMISTRY LA English DT Article ID LASER-INDUCED FLUORESCENCE; SPONTANEOUS-EMISSION RATES; CORRELATION SPECTROSCOPY; LEVITATED MICRODROPLETS; PHYCOERYTHRIN; RHODAMINE-6G; SOLIDS C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 35 TC 118 Z9 118 U1 1 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD JUL 1 PY 1995 VL 67 IS 13 BP A418 EP A423 DI 10.1021/ac00109a001 PG 6 WC Chemistry, Analytical SC Chemistry GA RF792 UT WOS:A1995RF79200002 ER PT J AU HUGHETT, P AF HUGHETT, P TI AN OPTIMAL CONSTRAINED LINEAR INVERSE METHOD FOR MAGNETIC SOURCE IMAGING SO ANNALS OF BIOMEDICAL ENGINEERING LA English DT Article DE MAGNETOENCEPHALOGRAPHY; MAGNETOCARDIOGRAPHY; INVERSE PROBLEMS; PRIOR INFORMATION; MINIMUM-NORM LEAST-SQUARES ESTIMATION; MINIMUM MEAN-SQUARE ERROR ESTIMATION ID COMPUTED-TOMOGRAPHY; RECONSTRUCTION; FIELDS; IMAGES AB Magnetic source imaging is the reconstruction of the current source distribution inside an inaccessible volume from magnetic field measurements made outside the volume. It is possible in many applications to estimate, from prior physiological and anatomical knowledge, the source positions, amplitudes, and correlations, as well as the noise amplitudes and correlations. The optimal constrained linear inverse method (OCLIM) uses this prior knowledge to obtain a minimum mean-square error estimate of the current distribution. OCLIM can be efficiently computed using the Cholesky decomposition, taking about a second on a workstation-class computer for a problem with 64 sources and 144 detectors. Any source and detector configuration is allowed as long as their positions are fixed a priori. Correlations among source and noise amplitudes are permitted. OCLIM reduces to the optimally weighted pseudoinverse method of Shim and Cho if the source amplitudes are independent and identically distributed and to the minimum-norm least-squares estimate in the limit of no measurement noise or no prior knowledge of the source amplitudes. In the general case, OCLIM has better mean-square error than either previous method. OCLIM appears well suited to magnetic imaging, since it exploits prior information, provides the minimum reconstruction error, and is inexpensive to compute. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. RP HUGHETT, P (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT ELECT ENGN & COMP SCI,MAIL STOP 55-121,BERKELEY,CA 94720, USA. NR 32 TC 13 Z9 13 U1 0 U2 1 PU BLACKWELL SCIENCE PUBL INC CAMBRIDGE PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0090-6964 J9 ANN BIOMED ENG JI Ann. Biomed. Eng. PD JUL-AUG PY 1995 VL 23 IS 4 BP 506 EP 523 DI 10.1007/BF02584450 PG 18 WC Engineering, Biomedical SC Engineering GA RK193 UT WOS:A1995RK19300017 PM 7486357 ER PT J AU KAUFMAN, EN SCOTT, CD WOODWARD, CA SCOTT, TC AF KAUFMAN, EN SCOTT, CD WOODWARD, CA SCOTT, TC TI USE OF MODIFIED ENZYMES FOR THE SOLUBILIZATION LIQUEFACTION OF BITUMINOUS COAL IN A FLUIDIZED-BED REACTOR SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Conference on Frontiers in Bioprocessing CY SEP 19-23, 1993 CL BOULDER, CO SP NeXstar, Univ Minnesota, Biol Proc Technol Inst, Bur Mines, Biol Proc Technol Inst, US EPA, NIST, Colorado Inst Res Biotechnol, Colorado Bioproc Ctr, Univ Colorado DE COAL SOLUBILIZATION; ENZYME MODIFICATION; ORGANIC BIOCATALYSIS; FLUIDIZED BED; FLUORESCENCE VISUALIZATION; SEGREGATION; REDUCING ENZYMES; SOLUBILITY ID ORGANIC-SOLVENTS AB Biocatalysts allow the solubilization/liquefaction of coal at near-ambient temperatures. This research has focused on the chemical modification of enzymes to enhance their solubility and activity in organic media, and on optimal reactor design for a biocatalyst coal liquefaction process. Modification of hydrogenase and cytochrome c using dinitrofluorobenzene (DNFB) or methoxypolyethylene glycol p-nitrophenyl carbonate (PEG-n) has effected increased solubilities up to 20 g/L in organic solvents ranging from dioxane to toluene. Use of these modified enzymes in a small fluidized-bed reactor (with H-2 sparge) resulted in >40% conversion of bituminous coal in 24 h. Research using model compounds suggests that the conversion process may be in part owing to splitting at methyl or ethyl bridges, and perhaps saturation of ring structures. A new class of continuous columnar reactors will be necessary to achieve the high throughput and low inventory necessary for biocatalyst processes. The controlling mechanisms of particle transport in fluidized-bed systems using very small coal particulates are being studied. This has included the hydrodynamic modeling of coal segregation in fluidized-bed reactors, with direct microscopic visualization using fluorescence microscopy. A summary of our previously published work on enzyme modification and fluorescence visualization is presented. RP KAUFMAN, EN (reprint author), OAK RIDGE NATL LAB,CTR BIOPROC RES & DEV,POB 2008,OAK RIDGE,TN 37831, USA. NR 21 TC 5 Z9 5 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07012 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD JUL-SEP PY 1995 VL 54 IS 1-3 BP 233 EP 248 DI 10.1007/BF02787922 PG 16 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA RY911 UT WOS:A1995RY91100016 ER PT J AU POLMAN, JK BRECKENRIDGE, CR STONER, DL ANDREWS, GF AF POLMAN, JK BRECKENRIDGE, CR STONER, DL ANDREWS, GF TI BIOLOGICALLY DERIVED VALUE-ADDED PRODUCTS FROM COAL SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 3rd International Conference on Frontiers in Bioprocessing CY SEP 19-23, 1993 CL BOULDER, CO SP NeXstar, Univ Minnesota, Biol Proc Technol Inst, Bur Mines, Biol Proc Technol Inst, US EPA, NIST, Colorado Inst Res Biotechnol, Colorado Bioproc Ctr, Univ Colorado DE COAL; LIGNITE; BIOPROCESSING; DEPOLYMERIZATION; DESULFURIZATION AB The Idaho National Engineering Laboratory (INEL) has for several years conducted research in the area of coal bioprocessing. Fundamental and exploratory research has been directed toward the conversion of coal to cleaner fuels and the remediation of harmful byproducts of coal utilization. Specific research projects have involved coal depolymerization, coal solubilization, removal of organosulfur and pyritic sulfur from coal, the molecular biology of coal-modifying microorganisms, removal of ash-forming minerals from coal, conversion of coal combustion gases, and the development of novel coal bioreactors. Notable research accomplishments include elucidation of mechanisms by which microorganisms solubilize different portions of coal, discovery and characterization of microorganisms capable of depolymerizing macromolecular coal, discovery of microorganisms capable of removing organosulfur from coal, development of technologies critical to analyzing biologically mediated depolymerization and organosulfur removal, novel methods of pyritic sulfur removal, novel methods of removal (and conversion) of CO2, SOx, and NOx from combustion gases, and new technologies for bioconversion of waste gypsum generated in coal combustion gas scrubbers. RP POLMAN, JK (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 20 TC 5 Z9 7 U1 1 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07012 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD JUL-SEP PY 1995 VL 54 IS 1-3 BP 249 EP 255 DI 10.1007/BF02787923 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA RY911 UT WOS:A1995RY91100017 ER PT J AU GREENING, LA JENG, HT FORMBY, JP CHENG, DC AF GREENING, LA JENG, HT FORMBY, JP CHENG, DC TI USE OF REGION, LIFE-CYCLE AND ROLE VARIABLES IN THE SHORT-RUN ESTIMATION OF THE DEMAND FOR GASOLINE AND MILES TRAVELED SO APPLIED ECONOMICS LA English DT Article ID ENERGY USE; ELASTICITIES AB Short-run demand for miles travelled and gasoline consumed are estimated for population subgroups defined by region, occupation and life-cycle. Understanding and quantifying the different responses of subgroups to changes in income and gasoline price are important from the perspective of transport and energy policies. Micro data are used to investigate the effects of marginal changes in price and income among sociodemographic groups. This paper demonstrates that there are significant differences in the estimated parameters between the general population and subgroups within the population. Further, significant differences may be demonstrated between those subgroups. C1 NATL CENT UNIV,DEPT FINANCE,CHUNGLI 32054,TAIWAN. UNIV ALABAMA,COLL COMMERCE & BUSINESS ADM,DEPT ECON FINANCE & LEGAL STUDIES,TUSCALOOSA,AL 35487. RP GREENING, LA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ENERGY ANAL PROGRAM,MAILSTOP 90-4000,BERKELEY,CA 94720, USA. NR 32 TC 16 Z9 16 U1 0 U2 1 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0003-6846 J9 APPL ECON JI Appl. Econ. PD JUL PY 1995 VL 27 IS 7 BP 643 EP 656 DI 10.1080/00036849500000054 PG 14 WC Economics SC Business & Economics GA RK476 UT WOS:A1995RK47600011 ER PT J AU MANLEY, O MARION, M TEMAM, R AF MANLEY, O MARION, M TEMAM, R TI FULLY NONLINEAR MULTISPECIES REACTION-DIFFUSION EQUATIONS SO APPLIED MATHEMATICS LETTERS LA English DT Article DE NONLINEAR PARTIAL DIFFERENTIAL EQUATIONS; COMBUSTION; REACTION DIFFUSION EQUATIONS; STEFAN-MAXWELL EQUATIONS AB We consider combustion problems in the presence of complex chemistry leading to fully nonlinear multispecies reaction-diffusion equations. We establish results of existence and uniqueness of solution and maximum principle i.e., positivity of the mass fractions, which relies on specific properties of the models. C1 ECOLE CENT LYON,CNRS,F-69130 ECULLY,FRANCE. ECOLE CENT LYON,DEPT MATH INFORMAT SYST,F-69130 ECULLY,FRANCE. UNIV PARIS 11,ANAL NUMER LAB,F-91405 ORSAY,FRANCE. INDIANA UNIV,INST APPL MATH & SCI COMP,BLOOMINGTON,IN 47405. RP MANLEY, O (reprint author), US DOE,OFF BASIC ENERGY SCI,WASHINGTON,DC 20585, USA. NR 6 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 0893-9659 J9 APPL MATH LETT JI Appl. Math. Lett. PD JUL PY 1995 VL 8 IS 4 BP 7 EP 11 DI 10.1016/0893-9659(95)00038-R PG 5 WC Mathematics, Applied SC Mathematics GA RM623 UT WOS:A1995RM62300002 ER PT J AU HINDMARSH, AC AF HINDMARSH, AC TI AVOIDING BDF STABILITY BARRIERS IN THE MOL SOLUTION OF ADVECTION-DOMINATED PROBLEMS SO APPLIED NUMERICAL MATHEMATICS LA English DT Article; Proceedings Paper CT 14th IMACS World Congress of Computation and Applied Mathematics CY JUL 11-15, 1994 CL GEORGIA INST TECHNOL, ATLANTA, GA SP Int Assoc Math & Comp Simulat HO GEORGIA INST TECHNOL AB Weakly damped oscillatory modes in ODE systems, such as are generated from advection-dominated PDE problems, frequently cause difficulty for BDF integrators, because of their absolute stability regions at high orders. We describe a procedure to detect the stability limit responsible for the difficulty. From it, we form a detection algorithm, which we have added to the order selection logic in an experimental version of the ODE solver VODE. Tests on an advection-diffusion problem demonstrate the effectiveness of this algorithm in lowering order to avoid the stability limit. RP HINDMARSH, AC (reprint author), LAWRENCE LIVERMORE NATL LAB,NUMER MATH GRP,L-316,LIVERMORE,CA 94551, USA. NR 6 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9274 J9 APPL NUMER MATH JI Appl. Numer. Math. PD JUL PY 1995 VL 17 IS 3 BP 311 EP 318 DI 10.1016/0168-9274(95)00036-T PG 8 WC Mathematics, Applied SC Mathematics GA RV377 UT WOS:A1995RV37700010 ER PT J AU KOCH, JA AF KOCH, JA TI COMPACT HIGH-RESOLUTION SOFT-X-RAY SPECTROGRAPH DESIGN USING 2 MATCHED GRAZING-INCIDENCE GRATINGS SO APPLIED OPTICS LA English DT Article DE SOFT X-RAY; HIGH RESOLUTION; GRATING; SPECTROGRAPH ID CORRECTED CONCAVE GRATINGS; CARBON K-EDGE; MEGA SPECTROMETER; RESOLVING POWER; LASER RESEARCH; DIFFRACTION; MICROSCOPY AB A novel and simple soft-x-ray grating-spectrograph design for high-resolution plasma-spectroscopy applications is presented and analyzed. This design uses dual, matched,concave varied-groove-density gratings to provide high dispersion and slit magnification and can achieve a very high spectral resolution (lambda/Delta lambda > 25,000) in an instrument that is less than 1 m in length while using detectors, such as microchannel plates, with relatively coarse spatial resolutions. The advantages of this design over other designs with a comparable spectral resolution include its simplicity and small size, whereas the disadvantages include a narrow useful spectral range (lambda/Delta lambda = 50). Potential applications include x-ray laser linewidth measurements. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 42 TC 3 Z9 3 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JUL 1 PY 1995 VL 34 IS 19 BP 3693 EP 3701 PG 9 WC Optics SC Optics GA RE615 UT WOS:A1995RE61500019 PM 21052190 ER PT J AU SKULINA, KM ALFORD, CS BIONTA, RM MAKOWIECKI, DM GULLIKSON, EM SOUFLI, R KORTRIGHT, JB UNDERWOOD, JH AF SKULINA, KM ALFORD, CS BIONTA, RM MAKOWIECKI, DM GULLIKSON, EM SOUFLI, R KORTRIGHT, JB UNDERWOOD, JH TI MOLYBDENUM BERYLLIUM MULTILAYER MIRRORS FOR NORMAL INCIDENCE IN THE EXTREME-ULTRAVIOLET SO APPLIED OPTICS LA English DT Article DE BERYLLIUM; MULTILAYER MIRRORS; EXTREME ULTRAVIOLET ID X-RAYS AB We report on a series of normal-incidence reflectance measurements at wavelengths just longer than the beryllium K-edge (11.1 nm) from molybdenum/beryllium multilayer mirrors. The highest peak reflectance was 68.7 +/- 0.2% at lambda = 11.3 nm obtained from a mirror with 70 bilayers ending in beryllium. To our knowledge, this is the highest normal-incidence reflectance that has been demonstrated in the 1-80-nm spectral range. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR XRAY OPT,BERKELEY,CA 94720. RP SKULINA, KM (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,MAILSTOP L-278,LIVERMORE,CA 94550, USA. NR 14 TC 49 Z9 55 U1 4 U2 12 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD JUL 1 PY 1995 VL 34 IS 19 BP 3727 EP 3730 PG 4 WC Optics SC Optics GA RE615 UT WOS:A1995RE61500023 PM 21052194 ER PT J AU LEON, R WERNER, P YU, KM KAMINSKA, M WEBER, ER AF LEON, R WERNER, P YU, KM KAMINSKA, M WEBER, ER TI ELECTRICAL-ACTIVITY AND PRECIPITATION BEHAVIOR OF COPPER IN GALLIUM-ARSENIDE SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID III-V-SEMICONDUCTORS; BOUND EXCITONS; GAAS; CU; ACCEPTORS AB The electrical properties and preferred lattice site of Cu in GaAs were investigated combining electrical and optical measurements with ion beam and structural analysis. From this comprehensive study it was determined that Cu introduces two levels in the band gap, that the concentration of electrically active centers introduced by Cu diffusion is considerably smaller than the total Cu concentration, that this ratio of electrically active to total Cu concentration depends strongly on the cooling speed after diffusion, and that the portion of Cu that remains electrically inactive forms Cu-Ga precipitates. C1 UNIV CALIF BERKELEY, DEPT MAT SCI, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. UNIV WARSAW, INST EXPTL PHYS, PL-00681 WARSAW, POLAND. RI Yu, Kin Man/J-1399-2012 OI Yu, Kin Man/0000-0003-1350-9642 NR 23 TC 20 Z9 20 U1 0 U2 3 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0947-8396 EI 1432-0630 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD JUL PY 1995 VL 61 IS 1 BP 7 EP 16 DI 10.1007/BF01538203 PG 10 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA RJ949 UT WOS:A1995RJ94900002 ER PT J AU BARSHICK, CM SMITH, DH JOHNSON, E KING, FL BASTUG, T FRICKE, B AF BARSHICK, CM SMITH, DH JOHNSON, E KING, FL BASTUG, T FRICKE, B TI PERIODIC NATURE OF METAL-NOBLE GAS ADDUCT IONS IN GLOW-DISCHARGE MASS-SPECTROMETRY SO APPLIED SPECTROSCOPY LA English DT Article DE GLOW DISCHARGE MASS SPECTROMETRY; RELATIVE ION YIELD; METAL-NOBLE GAS CLUSTERS; NOBLE GASES ID X=LI-NE; CATIONS; QUADRUPOLE AB The observation that ZnAr+ ion currents in a glow discharge can measure as high as 30% of those of Zn+ prompted a systematic study of metal-noble gas diatomic species. Twenty-four elements in combination with neon, argon, and krypton were included. Periodicity of behavior was observed from one row to the next with all three noble gases; periodicity was also observed as the identity of the noble gas was changed. The diatomic noble gas adduct ions of zinc, cadmium, and mercury (group 12) each displayed a concentration relative to the corresponding metal ion that was well above that of other elements in their respective rows. Investigation of the cause of this phenomenon eliminated glow discharge pressure and power conditions. Binding energies of the various species were qualitatively consistent with the observation of relative abundances of metal-noble gas diatomic ions as they varied with the identity of the noble gas, but did not explain why ZnX(+), CdX(+), and HgX(+) form in what seem to be anomalously high abundance. Variations in the sputtering rates of the transition metals (Zn > Cu > Ni > Fe) are consistent with the observation that ZnX(+) > CuX(+) > NIX(+) > FeX(+); the resulting increase in collision frequency (with increasing sputtering rate) is believed to account for the relative abundances of these adduct ions in the discharge. C1 W VIRGINIA UNIV,DEPT CHEM,MORGANTOWN,WV 26506. UNIV KASSEL,DEPT PHYS,D-34109 KASSEL,GERMANY. RP BARSHICK, CM (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. NR 38 TC 9 Z9 9 U1 0 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD JUL PY 1995 VL 49 IS 7 BP 885 EP 889 DI 10.1366/0003702953964840 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA RK403 UT WOS:A1995RK40300005 ER PT J AU BAJIC, SJ LUO, SQ JONES, RW MCCLELLAND, JF AF BAJIC, SJ LUO, SQ JONES, RW MCCLELLAND, JF TI ANALYSIS OF UNDERGROUND-STORAGE TANK WASTE SIMULANTS BY FOURIER-TRANSFORM INFRARED PHOTOACOUSTIC-SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Article DE FT-IR/PAS; PHOTOACOUSTIC SPECTROSCOPY; ENVIRONMENTAL, WASTE AND SLUDGE ANALYSIS ID SCAN AB Underground storage tank waste sludge from nuclear fuel processes is difficult to analyze because of the extreme heterogeneity, chemical reactivity, and radioactivity of the waste. Conventional methods of analysis typically require extensive sample handling procedures either to thin the sample or to separate components prior to analysis. These procedures are time consuming require radiation containment cells, and increase the risk of radiation exposure to lab personnel as a result of the extensive handling. In this paper a method utilizing Fourier transform infrared photoacoustic spectroscopy to analyze hazardous underground storage tank waste with a minimal amount of sample and sample handling is discussed. The method was developed with the use of waste tank simulants that were obtained from the Westinghouse Hanford Company. Emphasis was placed on the determination of disodium nickel ferrocyanide, sodium nitrate, and sodium nitrite because of the concern for the potential of exothermic reactions occurring between oxidizers and ferrocyanide-containing compounds. This method also allows for the analysis of other ions of interest in waste processes such as sodium sulfate. A simple sample preparation method is also discussed which uses freeze drying to remove water from the simulants while maintaining a uniform sample for analysis. RP BAJIC, SJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 10 TC 9 Z9 10 U1 0 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD JUL PY 1995 VL 49 IS 7 BP 1000 EP 1005 DI 10.1366/0003702953964642 PG 6 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA RK403 UT WOS:A1995RK40300020 ER PT J AU Ludwig, F Dantsker, E Koelle, D Kleiner, R Miklich, AH Clarke, J AF Ludwig, F Dantsker, E Koelle, D Kleiner, R Miklich, AH Clarke, J TI Multilayer magnetometers based on high-T-c SQUIDs SO APPLIED SUPERCONDUCTIVITY LA English DT Article ID JUNCTION DC SQUIDS; FLUX TRANSFORMERS; 1/F NOISE; YBA2CU3O7-X; INDUCTANCE; DEVICES; LAYERS; FILMS AB Recent progress towards the development of a multilayer technology for the high transition temperature superconductor YBa2Cu3O7-x (YBCO) is described. Early YBCO-SrTiO3-YBCO multilayers, fabricated with laser deposition and patterning of each layer, were plagued with excess magnetic flux noise at low frequencies. This noise was generated by the thermally activated hopping of flux vortices between pinning sites in the superconducting films. The progressive reduction in the level of this noise by improving the quality of the films is described. A key issue is the protection of the first YBCO film with a thin SrTiO3 cap before patterning. This process, which currently produces the lowest level of 1/f noise, was used to fabricate a number of multilayer structures. A multiturn flux transformer coupled to a single-layer de superconducting quantum interference device (SQUID) in a flip-chip arrangement achieved a magnetic field noise at 77 K of 8.5 fT Hz(-1/2) at 1 kHz and 27 fT Hz(-1/2) at 1 Hz; the pickup loop was 10 mm across. A monolithic 16-turn multiloop magnetometer with a diameter of 7 mm and operated at 77 K yielded 18 fT Hz(-1/2) at 1 kHz and 37 fT Hz(-1/2) at 1 Hz. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY NATL LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RI Koelle, Dieter/E-5111-2011 NR 60 TC 28 Z9 28 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD JUL-OCT PY 1995 VL 3 IS 7-10 BP 383 EP 398 DI 10.1016/0964-1807(95)00078-X PG 16 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA UN848 UT WOS:A1995UN84800003 ER PT J AU SADINSKI, WJ LEVAY, G WILSON, MC HOFFMAN, JR BODELL, WJ ANDERSON, SL AF SADINSKI, WJ LEVAY, G WILSON, MC HOFFMAN, JR BODELL, WJ ANDERSON, SL TI RELATIONSHIPS AMONG DNA-ADDUCTS, MICRONUCLEI, AND FITNESS PARAMETERS IN XENOPUS-LAEVIS EXPOSED TO BENZO[A]PYRENE SO AQUATIC TOXICOLOGY LA English DT Article DE BIOMARKERS; FITNESS; AMPHIBIANS; XENOPUS LAEVIS; P-32 POSTLABELING; DNA ADDUCTS; MICRONUCLEI; BENZO[A]PYRENE ID NEWT PLEURODELES-WALTL; SOLE PAROPHRYS-VETULUS; RED-BLOOD-CELLS; P-32-POSTLABELING ANALYSIS; ENGLISH SOLE; PERIPHERAL ERYTHROCYTES; INVIVO GENOTOXICITY; RANA-CATESBEIANA; ACRIDINE-ORANGE; WINTER FLOUNDER AB We investigated whether hepatic DNA adducts, erythrocytic micronuclei, wet weight, developmental stage, wet weight at metamorphosis, and time to metamorphosis changed in larval Xenopus laevis exposed to varied doses of benzo[a]pyrene (B[a]P). Using P-32-postlabeling, we observed relative DNA adduct levels of 0 to 13.7 x 10(-7) following continuous exposure to 0 to 496 nM B[a]P for 12 days and relative levels of 0 to 10 x 10(-7) after exposure to 248 nM B[a]P over a range of 0 to 16 days. Mean numbers of micronuclei were 1.7, 6.3, and 16.4/1000 red blood cells after exposure to 0, 31, and 248 nM B[a]P, respectively, for 14 days. Micronuclei also ranged from 1.3 to 120.5/1000 red blood cells following exposure to 248 nM B[a]P over a range of 0 to 16 days, Comparatively, levels of both DNA adducts and micronuclei were greatly reduced in animals exposed previously to 31 and 248 nM B[a]P, but assayed at metamorphosis. Larvae exposed to 248 nM B[a]P for 14 days took approximately 4 days longer to metamorphose than unexposed larvae. This increased time to metamorphosis was associated with increased DNA adducts and micronuclei in larvae exposed to 248 nM B[a]P. However, DNA adducts and micronuclei also increased in larvae exposed to 31 nM B[a]P, while time to metamorphosis did not, Larval wet weight was reduced by as much as 44% immediately following exposure to B[a]P. However, there was no effect of exposure on wet weight at metamorphosis. Exposed animals were up to 2 developmental stages younger than unexposed animals in one experiment, but differences among exposed and unexposed animals were less distinct in a second experiment. These studies suggest that DNA adducts and micronuclei can be sensitive measures of sublethal DNA damage, as well as possible short-term indicators of indirect effects on fitness in amphibians. C1 UNIV CALIF SAN FRANCISCO,SCH MED,DEPT NEUROL SURG,BRAIN TUMOR RES CTR,SAN FRANCISCO,CA 94143. RP SADINSKI, WJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,1 CYCLOTRON RD,MS 70-193 A,BERKELEY,CA 94720, USA. NR 61 TC 14 Z9 15 U1 3 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-445X J9 AQUAT TOXICOL JI Aquat. Toxicol. PD JUL PY 1995 VL 32 IS 4 BP 333 EP 352 DI 10.1016/0166-445X(94)00092-5 PG 20 WC Marine & Freshwater Biology; Toxicology SC Marine & Freshwater Biology; Toxicology GA RL478 UT WOS:A1995RL47800005 ER PT J AU JONES, TD AF JONES, TD TI TOXICOLOGICAL POTENCY OF 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN RELATIVE TO 100 OTHER COMPOUNDS - A RELATIVE POTENCY ANALYSIS OF IN-VITRO AND IN-VIVO TEST DATA SO ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY LA English DT Article ID CARCINOGENIC POTENCY; HAZARD EVALUATION; CHEMICALS; MIXTURES; DIOXIN; WATER AB A common definition of relative potency is the dose of a reference compound required to cause a particular incidence of a specific toxic response divided by the dose of a test compound needed to cause an equal incidence of that same effect. In this simple manner, toxicological assessments for a chemical of concern can be made in terms of another compound about which much is known from a human health perspective. Relative potency factors were used to compare 2,3,7,8-tetrachlorodibenzo-p-dioxin CAS # 1746-01-6 (TCDD) with 100 other compounds both individually and collectively. All results were standardized to a common scale that spanned many orders of magnitude and was indexed to an arbitrary potency of unity for benzo(a)pyrene [B(a)P]. From comparisons between 2,771 pairs of bioassay results (i.e., matched experimental design conditions) for TCDD compared with the 100 other compounds, it was found that TCDD is about 600 times as toxic as B(a)P (interquartile range of 130 to 1,900). The distribution of relative potency values is fitted accurately with a log-normal distribution function having an untransformed mean of 550 and an untransformed slope (i.e., the inverse of the standard deviation of the distribution) of 140. These factors combined with (a) a reference lifetime carcinogenic risk level of 1/100,000 and (b) a universal, potency-dependent risk coefficient (estimated from the collection of epidemiologically-based carcinogens) yielded estimates that equally toxic concentrations for TCDD should be in the range of 13 pg/m(3) and 7 pg/L in air and water, respectively. RP JONES, TD (reprint author), OAK RIDGE NATL LAB,DIV HLTH SCI RES,BLDG 4500-S MS 6101,POB 2008,OAK RIDGE,TN 37831, USA. NR 31 TC 7 Z9 7 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0090-4341 J9 ARCH ENVIRON CON TOX JI Arch. Environ. Contam. Toxicol. PD JUL PY 1995 VL 29 IS 1 BP 77 EP 85 PG 9 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA RA088 UT WOS:A1995RA08800013 PM 7794015 ER PT J AU JAWORSKA, JS HUNTER, RS SCHULTZ, TW AF JAWORSKA, JS HUNTER, RS SCHULTZ, TW TI QUANTITATIVE STRUCTURE-TOXICITY RELATIONSHIPS AND VOLUME FRACTION ANALYSES FOR SELECTED ESTERS SO ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY LA English DT Article ID TETRAHYMENA-PYRIFORMIS; PIMEPHALES-PROMELAS; FATHEAD MINNOW; NARCOSIS; ALCOHOLS; SYSTEMS AB The acute toxicity of aliphatic and aromatic mono and diesters in two eucaryotic organisms was compared. The test systems were the static 2-d Tetrahymena pyriformis 50% population growth impairment (IGC(50)(-1)) assay, and the flow-through 4-d Pimephales promelas 50% mortality (LC(50)(-1)) assay. In ciliates, esters act via the nonpolar narcosis mechanism of toxic action. This was indicated by: the high quality 1-octanol/water partition coefficient (log K-ow) dependent quantitative structure-activity relationship (QSAR), log IGC(50)(-1) = 0.79 (log K-ow) - 1.93, n = 15, r(2) = 0.945, s = 0.22, f = 222.37 Pr > f = 0.0001); volume fraction (V-f) (0.8e-02); and ''a'' coefficient (0.3) which are not different from other nonpolar narcotics. In vivo hydrolysis in Tetrahymena appears to be insignificant. However, in fish, presumably because of more active esterases, in vivo hydrolysis is significant and leads to greater toxicity of esters than observed for nonpolar narcotics. Moreover, it leads to a unique high quality QSAR, log LC(50)(-1) = 0.64 (log K-ow) - 0.64, n = 14, r(2) = 0.945, s = 0.22, f = 207.08, Pr > f = 0.0001). Due to in vivo hydrolysis, a nonreducing concentration gradient is formed between water and fish. Therefore, the fish take up more toxicant as compared to a situation that leads to thermodynamic equilibrium. Additional information about the mechanism of ester toxicity in fish was gained by applying corrections for hydrolysis in volume fraction analyses. The corrected V-f (0.6e-02) is very close to the one found for nonpolar narcotics (0.7e-02). These analyses suggest that esters which hydrolyze to an acid and aliphatic alcohol act as nonpolar narcotics. Moreover, the mechanism of toxic action of esters that yield a phenol upon hydrolysis is mixed and represents polar and nonpolar narcoses. C1 UNIV TENNESSEE,COLL VET MED,KNOXVILLE,TN 37901. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. UNIV MINNESOTA,NAT RESOURCES RES INST,DULUTH,MN 55811. NR 36 TC 32 Z9 34 U1 2 U2 9 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0090-4341 J9 ARCH ENVIRON CON TOX JI Arch. Environ. Contam. Toxicol. PD JUL PY 1995 VL 29 IS 1 BP 86 EP 93 PG 8 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA RA088 UT WOS:A1995RA08800014 PM 7794017 ER PT J AU ALVES, DR COOK, KH AF ALVES, DR COOK, KH TI GROUND-BASED DISCOVERY OF CEPHEIDS AND MIRAS IN M101 SO ASTRONOMICAL JOURNAL LA English DT Article ID LONG-PERIOD VARIABLES; H-II REGIONS; DISTANCE SCALE; SUPER-GIANTS; GALAXIES; STARS; PHOTOMETRY; NGC-2403 C1 LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. NR 25 TC 14 Z9 14 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0004-6256 J9 ASTRON J JI Astron. J. PD JUL PY 1995 VL 110 IS 1 BP 192 EP 198 DI 10.1086/117506 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RE741 UT WOS:A1995RE74100014 ER PT J AU DEPAOLIS, F INGROSSO, G JETZER, P QADIR, A RONCADELLI, M AF DEPAOLIS, F INGROSSO, G JETZER, P QADIR, A RONCADELLI, M TI OBSERVING MOLECULAR-HYDROGEN CLOUDS AND DARK MASSIVE OBJECTS IN GALACTIC HALOS SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE DARK MATTER; COSMIC BACKGROUND RADIATION; INFRARED, GALAXIES; GALAXIES, M 31 ID BROWN DWARFS; GALAXY AB Molecular hydrogen clouds can contribute substantially to the galactic halo dark matter and may lead to the birth of Massive Halo Objects (MHOs) observed indirectly by microlensing. We present a method to detect these molecular clouds in the halo of M31 using the Doppler shift effect. We also consider the possibility to directly observe MHOs in the halo of M31 via their infrared emission. C1 UNIV ZURICH, INST THEORET PHYS, CH-8057 ZURICH, SWITZERLAND. UNIV LECCE, DIPARTIMENTO FIS, I-73100 LECCE, ITALY. IST NAZL FIS NUCL, SEZ LECCE, I-73100 LECCE, ITALY. UNIV CALIF BERKELEY, INST NUCL & PARTICLE ASTROPHYS, LBL, BERKELEY, CA USA. UNIV CALIF BERKELEY, CTR PARTICLE ASTROPHYS, BERKELEY, CA USA. QUAID I AZAM UNIV, DEPT MATH, ISLAMABAD, PAKISTAN. IST NAZL FIS NUCL, SEZ PAVIA, I-27100 PAVIA, ITALY. NR 21 TC 45 Z9 45 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD JUL PY 1995 VL 299 IS 3 BP 647 EP 649 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RL630 UT WOS:A1995RL63000003 ER PT J AU YOSHII, Y MATHEWS, GJ KAJINO, T AF YOSHII, Y MATHEWS, GJ KAJINO, T TI BERYLLIUM AND BORON ABUNDANCES OF METAL-DEFICIENT HALO STARS AND ACCRETION OF INTERSTELLAR MATTER SO ASTROPHYSICAL JOURNAL LA English DT Article DE HEADINGS, ACCRETION, ACCRETION DISKS; GALAXY, HALO; STARS, ABUNDANCES ID COSMIC-RAY NUCLEOSYNTHESIS; LINE WHITE-DWARFS; GALACTIC HALO; EARLY GALAXY; PRIMORDIAL NUCLEOSYNTHESIS; EVOLUTION; BE-9; ELEMENTS; STANDARD; UNIVERSE AB We discuss the correlation of light-element abundances with metallicity for metal-deficient dwarfs in the Galactic halo. We show that such stars can experience some metal enrichment after their formation because of accreting interstellar material during repeated encounters with molecular clouds in the Galactic plane. If light-element abundances are produced by the secondary spallation of preexisting heavy elements by cosmic rays, then this accretion affects the light-element abundances and metal abundances differently. We construct an analytic chemical evolution model for the halo and disk which reproduces the observed abundance correlations and the halo metallicity distribution. We show that the introduction of interstellar accretion leads to a low metallicity plateau in the correlation of light elements with metallicity which would mimic the formation of such elements in the big bang. We suggest here that the observation of a constant light-element abundance at low metallicity may not be a signature of primordial origin but rather a measure of the average accretion rate from metal-enriched gas in the Galactic plane. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. NATL ASTRON OBSERV,TOKYO 181,JAPAN. NATL ASTRON OBSERV,DIV THEORET ASTROPHYS,TOKYO 181,JAPAN. RP YOSHII, Y (reprint author), UNIV TOKYO,INST ASTRON,MITAKA,TOKYO 181,JAPAN. NR 50 TC 16 Z9 16 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 JUL 1 PY 1995 VL 447 IS 1 BP 184 EP 190 DI 10.1086/175864 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RF079 UT WOS:A1995RF07900014 ER PT J AU MCCARTHY, PJ SPINRAD, H VANBREUGEL, W AF MCCARTHY, PJ SPINRAD, H VANBREUGEL, W TI EMISSION-LINE IMAGING OF 3CR RADIO GALAXIES .1. IMAGING DATA SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Review DE GALAXIES, STRUCTURE; ULTRAVIOLET, GALAXIES ID HIGH SPATIAL-RESOLUTION; SPECTRAL ENERGY-DISTRIBUTIONS; MULTICOLOR SURFACE PHOTOMETRY; LYMAN-ALPHA EMISSION; HIGH-REDSHIFT; VLA OBSERVATIONS; EMITTING GAS; MULTIFREQUENCY OBSERVATIONS; OPTICAL IDENTIFICATIONS; 5-KM TELESCOPE AB We present emission-line and continuum images of a sample of 53 3CR radio galaxies with 0.05 < z < 2.0. Each object was imaged in one of the following emission lines: H alpha, [O III] lambda 5007, [O II] lambda 3727, or Ly alpha. The visible continuum, emission-line, and radio morphologies of each object are described. The galaxies show a wide range of structures on scales ranging from subkiloparsec circumnuclear emission-line regions to 300 kpc nebulae. For z > 0.3 nearly all of the emission-line regions are aligned with their radio source axes. At redshifts greater than similar to 0.6 the optical/UV continua show a strong alignment with the radio axes. All of the emission-line regions show a strong correlation with the arm-length asymmetry of their radio source. The data presented here are analyzed in Paper II. C1 CARNEGIE INST WASHINGTON OBSERV,WASHINGTON,DC. KITT PEAK NATL OBSERV,TUCSON,AZ 85726. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. RP MCCARTHY, PJ (reprint author), UNIV CALIF BERKELEY,BERKELEY,CA, USA. NR 95 TC 102 Z9 102 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUL PY 1995 VL 99 IS 1 BP 27 EP 66 DI 10.1086/192178 PG 40 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RD575 UT WOS:A1995RD57500002 ER PT J AU BONO, G CAPUTO, F STELLINGWERF, RF AF BONO, G CAPUTO, F STELLINGWERF, RF TI SYNTHETIC MEAN COLORS FOR RR LYRAE VARIABLES SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE STARS, ATMOSPHERES; STARS, HORIZONTAL-BRANCH; STARS, OSCILLATIONS STARS, VARIABLES, OTHER(RR LYRAE); TECHNIQUES, PHOTOMETRIC ID GLOBULAR-CLUSTER; HORIZONTAL-BRANCH; BV PHOTOMETRY; STARS AB Convective pulsating models computed for wide ranges of luminosity and effective temperature (Bone and Stellingwerf 1994) are used together with stellar atmosphere models (Kurucz 1992) to obtain a set of synthetic B - V and V - K mean colors for ab- and c-type RR Lyrae variables. The results clearly show that neither the blue nor the infrared mean colors are representative of the equivalent static value, i.e., the color of the variable if it were a static star, over the whole instability strip. Moreover, it is shown that the discrepancy between synthetic mean colors and static color is a function of the amplitude of the light curve. On this basis, the amplitude corrections to observed mean colors to obtain the color of the underlying static star are derived. C1 IST ASTROFIS SPAZIALE,I-00044 FRASCATI,ITALY. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP BONO, G (reprint author), OSSERV ASTRON TRIESTE,VIA GB TIEPOLO 11,I-34131 TRIESTE,ITALY. NR 14 TC 59 Z9 59 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD JUL PY 1995 VL 99 IS 1 BP 263 EP 279 DI 10.1086/192186 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RD575 UT WOS:A1995RD57500010 ER PT J AU THATCHER, TL LAYTON, DW AF THATCHER, TL LAYTON, DW TI DEPOSITION, RESUSPENSION, AND PENETRATION OF PARTICLES WITHIN A RESIDENCE SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE INDOOR AIR QUALITY; INDOOR OUTDOOR COMPARISON; PARTICULATE MATTER ID INDOOR-OUTDOOR RELATIONSHIPS; RESPIRABLE SULFATES; PARTICULATE MATTER; IONIC SUBSTANCES; HOMES; AIR; COMMUNITY; PM-10; DUSTS; MODEL AB Aerosol concentrations and particle size distributions were measured indoors and outdoors at a two-storey residence in California during the summer months. A single central sampling point in the downstairs living area was used for all indoor samples. The deposition rate for supermicron particles was measured by raising the particle concentration indoors and simultaneously measuring air infiltration rates and particle concentration decay rates. For particles between 1 and 5 mu m diameter, the deposition velocity closely matched the calculated settling velocity. For particles larger than 5 mu m, the deposition velocity was less than the calculated settling velocity, probably due to the nonspherical nature of these particles. The penetration factor for supermicron particles, a measure of the amount of filtration achieved by the building shell, was calculated using the experimentally determined deposition velocities and indoor/outdoor particle ratios when no resuspension or generation activities were present. A penetration factor of one was found, indicating that the building shell was not effective at removing infiltrating particles. Resuspension was measured under several different conditions and was found to have a significant impact on indoor particle concentrations. Just walking into a room can increase the particle concentration by 100% for some supermicron particle sizes. For light activity with four people in the residence, a resuspension rate between 1.8 x 10(-5) and 3.8 x 10(-4) h(-1) was found for supermicron particles assuming a particle density of 1 gm(-3). These calculated rates may be lower than the actual rates due to assumptions made about the particle size distribution of the floor dust. C1 LAWRENCE LIVERMORE NATL LAB,DIV HLTH & ECOL ASSESSMENT,LIVERMORE,CA 94550. RP THATCHER, TL (reprint author), UNIV CALIF BERKELEY,DEPT CIVIL ENGN,BERKELEY,CA 94720, USA. NR 35 TC 441 Z9 450 U1 16 U2 108 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 JUL PY 1995 VL 29 IS 13 BP 1487 EP 1497 DI 10.1016/1352-2310(95)00016-R PG 11 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA RH248 UT WOS:A1995RH24800002 ER PT J AU SHANNON, JD VOLDNER, EC AF SHANNON, JD VOLDNER, EC TI MODELING ATMOSPHERIC CONCENTRATIONS OF MERCURY AND DEPOSITION TO THE GREAT-LAKES SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE MERCURY; DEPOSITION; GREAT LAKES; MODELING; LONG-RANGE TRANSPORT; MERCURY LOADING ID WATER; AIR; POLLUTION; EXCHANGE; FOREST; FLUX AB Regional patterns of seasonal and annual average air concentrations and cumulative deposition of mercury to the Great Lakes basin are calculated with the ASTRAP model. The model treats the Hg system as three chemical components: elemental (Hg-0), particulate (Hg-p), and gaseous divalent (Hg-II). Primary anthropogenic emission inventories (i.e. emissions resulting from current activities) include surface and elevated sources of each of the three Hg species for eastern North America. Natural and secondary anthropogenic emissions (i.e. reemission of Hg deposited or released during earlier anthropogenic activity) over the United States and Canada are estimated by defining an emission term for Hg-0 that varies with latitude and season. Global background concentrations of Hg-0 and Hg-p are specified to average annually 1.0 and 0.01 ng m(-3), respectively. Rates of parameterizations of wet and dry removal are very rapid for Hg-II, intermediate for Hg-p, and very slow for Hg-0. Because of the disparate removal efficiencies, estimates of deposition resulting from anthropogenic emissions are critically dependent upon the speciation of emissions and, for the rapidly depositing Hg-II, the assumptions about effective stack heights. Integration of the Hg deposition field over the Great Lakes produces estimates of direct atmospheric loading from primary anthropogenic emissions of 1.44 and 2.46 t Hg yr(-1) by wet and dry deposition, respectively. Estimates of direct loading from natural and secondary anthropogenic emissions of Hg-0 over the continent are 0.09 and 0.15 t Hg yr(-1) for wet and dry deposition, respectively, while the corresponding contributions from the global background are estimated to be 0.15 and 0.39 t Hg yr(-1), respettively. Although they constitute only 16% of estimated anthropogenic emissions, emissions of Hg-II contribute 78% of the current direct anthropogenic deposition to the Lakes, or 65% of the deposition df Hg from all sources. Revolatilization of Hg-0 from the Lakes is estimated to lie between 2.3 and 13.7 t Hg yr(-1). Thus, revolatilization may well be greater than the direct atmospheric loading of all Hg species to the Lakes, 4.7 t Hg yr(-1). C1 ENVIRONM CANADA,ATMOSPHER ENVIRONM SERV,DOWNSVIEW,ON M3H 5T4,CANADA. RP SHANNON, JD (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439, USA. NR 36 TC 54 Z9 54 U1 1 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 JUL PY 1995 VL 29 IS 14 BP 1649 EP 1661 DI 10.1016/1352-2310(95)00075-A PG 13 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA RJ095 UT WOS:A1995RJ09500007 ER PT J AU GUNDEL, LA LEE, VC MAHANAMA, KRR STEVENS, RK DAISEY, JM AF GUNDEL, LA LEE, VC MAHANAMA, KRR STEVENS, RK DAISEY, JM TI DIRECT DETERMINATION OF THE PHASE DISTRIBUTIONS OF SEMIVOLATILE POLYCYCLIC AROMATIC-HYDROCARBONS USING ANNULAR DENUDERS SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE ANNULAR DENUDER; ENVIRONMENTAL TOBACCO SMOKE; INDOOR AIR; AIRBORNE PARTICULATE MATTER; PHASE DISTRIBUTION; POLYCYCLIC AROMATIC HYDROCARBONS (PAH); SAMPLING ARTIFACT; SEMIVOLATILE ORGANICS ID SEMIVOLATILE ORGANIC-COMPOUNDS; GAS-PARTICLE DISTRIBUTIONS; CHROMATOGRAPHIC DETERMINATION; ATMOSPHERIC AEROSOLS; AMBIENT AIR; DIFFUSION DENUDER; FIBER FILTERS; PARA-DIOXINS; COLLECTION; PARTICULATE AB An annular denuder-based sampler, here called the integrated organic vapor/particle sampler (IOVPS), has been developed for direct determination of both gaseous and particulate semi-volatile organic species. The IOVPS uses a cyclone inlet for removal of particles greater than 2.5 mu m (D-50) from the airstream, followed by two or three sandblasted glass annular denuders coated with ground particles of an adsorbent resin. The denuders trap the gas-phase species of interest before the airstream passes through a filter and a backup denuder. Extracts of the denuders and filters are analyzed for the semi-volatile species of interest. The IOVPS has been tested and validated for sampling semi-volatile polycyclic aromatic hydrocarbons (PAH) in indoor laboratory room air and environmental tobacco smoke (ETS). Ground XAD-4 was the adsorbent for these initial studies. Gas- and particulate-phase concentrations of semi-volatile PAH are presented for these two environments. The new sampler provides the means for directly determining phase distributions of PAH and other classes of semi-volatile organic species, rather than by difference or by techniques that are subject to large positive and negative artifacts. C1 US EPA,ATMOSPHER RES & EXPOSURE ASSESSMENT BRANCH,SOUCE APPORTIONMENT BRANCH,RES TRIANGLE PK,NC 27711. RP GUNDEL, LA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,INDOOR ENVIRONM PROGRAM,BERKELEY,CA 94720, USA. NR 64 TC 155 Z9 157 U1 2 U2 9 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 JUL PY 1995 VL 29 IS 14 BP 1719 EP 1733 DI 10.1016/1352-2310(94)00366-S PG 15 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA RJ095 UT WOS:A1995RJ09500013 ER PT J AU FRICKE, G BERNHARDT, C HEILIG, K SCHALLER, LA SCHELLENBERG, L SHERA, EB DEJAGER, CW AF FRICKE, G BERNHARDT, C HEILIG, K SCHALLER, LA SCHELLENBERG, L SHERA, EB DEJAGER, CW TI NUCLEAR GROUND-STATE CHARGE RADII FROM ELECTROMAGNETIC-INTERACTIONS SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article ID ELASTIC ELECTRON-SCATTERING; OPTICAL ISOTOPE SHIFTS; LOW-LYING STATES; LASER SPECTROSCOPY; SPECTRAL-LINES; DEPENDENCE; ATOMS; C-12; PB AB The Tables summarize experimental results from muonic atom transition energies, nuclear charge parameters from elastic electron scattering, and K x-ray isotope shifts in so far as they provide information on nuclear ground-state charge radii. Numerous experimental results for optical isotope shifts have been published elsewhere; for eight elements the relevant information is condensed (''projected'') here to one optical line per element. A model-independent analysis which combines data from all three experimental methods is applied to these elements and is presented as an illustration of the improved accuracy for the rms radii and Barrett radii which result from this analysis. (C) 1995 Academic Press, Inc. C1 UNIV HANNOVER,INST ATOM & MOLEK PHYS,D-30167 HANNOVER,GERMANY. UNIV FRIBOURG,INST PHYS,CH-1700 FRIBOURG,SWITZERLAND. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NATL INST NUCL & HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS. RP FRICKE, G (reprint author), UNIV MAINZ,INST KERNPHYS,JJ BECHER WEG 45,D-55099 MAINZ,GERMANY. NR 57 TC 358 Z9 360 U1 1 U2 10 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD JUL PY 1995 VL 60 IS 2 BP 177 EP 285 DI 10.1006/adnd.1995.1007 PG 109 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA RN903 UT WOS:A1995RN90300001 ER PT J AU Edwards, CF Marx, KD AF Edwards, CF Marx, KD TI Multipoint statistical structure of the ideal spray .1. Fundamental concepts and the realization density SO ATOMIZATION AND SPRAYS LA English DT Article AB In this study we develop the theoretical framework required for analysis of the time-based multipoint statistics of sprays. This is accomplished in the context of the ideal spray-a random assemblage of droplets modeled as noninteracting point particles. It is shown that such a spray may be decomposed into a series of independent single-class sprays, each of which is driven by an inhomogeneous temporal Poisson process. Complete spray behavior is found by superposition of these processes. A function is derived that contains all possible information about one of these single-class sprays, the realization density. All of the customary multipoint statistics-the autocorrelation, power spectral density, fluctuation moments, etc.-may be developed from the realization density by suitable integrations over its probability space. Derivations of these quantities from the realization density are reported in a series of companion articles. RP Edwards, CF (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA, USA. NR 9 TC 23 Z9 24 U1 0 U2 0 PU BEGELL HOUSE INC PI NEW YORK PA 79 MADISON AVE, SUITE 1205, NEW YORK, NY 10016-7892 SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PD JUL-OCT PY 1995 VL 5 IS 4-5 BP 435 EP 455 PG 21 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA TL115 UT WOS:A1995TL11500005 ER PT J AU Edwards, CF Marx, KD AF Edwards, CF Marx, KD TI Multipoint statistical structure of the ideal spray .2. Evaluating steadiness using the interparticle time distribution SO ATOMIZATION AND SPRAYS LA English DT Article AB Evaluation of the steadiness of sprays is possible using the interparticle time distribution-an easily measurable function that contains information about the expected occurrence rate of droplets in a spray. Combined with ensemble-averaging of spray realizations, the interparticle time distribution permits unambiguous classification of sprays on the basis of the time dependence of their intensity function-the probability density for droplet occurrence. Three major spray classifications are defined: steady, unsteady/deterministic, and unsteady/stochostic. Each of the two latter categories may be further refined, leading to the classifications sinusoidal, complex periodic, almost periodic, transient, strictly stationary, N-point stationary, weakly stationary, and nonstationary. Analytical expressions for the interparticle time distribution are derived for each major category of spray using the ideal spray assumptions. Using these expressions, methods are developed that permit unambiguous classification by means of time-series phase Doppler data. The classification methods (and the existence of the classifications themselves) are then demonstrated by application to data from a nominally steady kerosene spray flame. RP Edwards, CF (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA, USA. NR 9 TC 15 Z9 15 U1 0 U2 0 PU BEGELL HOUSE INC PI NEW YORK PA 79 MADISON AVE, SUITE 1205, NEW YORK, NY 10016-7892 SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PD JUL-OCT PY 1995 VL 5 IS 4-5 BP 457 EP 505 PG 49 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA TL115 UT WOS:A1995TL11500006 ER PT J AU Brandt, CA Parrish, JK Hodges, CN AF Brandt, CA Parrish, JK Hodges, CN TI Predictive approaches to habitat quantification: Dark-rumped petrels on Haleakala, Maui SO AUK LA English DT Article ID NEST-SITE SELECTION; ISLAND AB Physical characteristics of the nesting habitat of the endangered Hawaiian Dark-rumped Petrel (Pterodroma phaeopygia sandwichensis), nesting on Haleakala volcano, Maul, were quantified in order to determine whether birds were choosing nesting sites nonrandomly. Nesting habitat was sampled at three spatial scales: burrow (within immediate vicinity of a petrel burrow), colony (10-60 m from a petrel burrow), and landscape (1,000-m transects through habitat containing colonies). We used a probability model based on logistic regression to discriminate among the three sampling scales. The model was quite successful in reclassifying the locations, correctly identifying over 91% of the burrow sites as such. In general, burrows were located on steep slopes under large rocks in the vicinity of shrub cover. This set of characteristics was not indicative of habitat at either the colony or landscape scales. Our study reveals two important aspects in evaluating habitat preferences for the Dark-rumped Petrel population on Haleakala: (1) habitat must be evaluated multidimensionally, and (2) important aspects of habitat associations may become apparent only at certain scales. The nesting range of the Dark-rumped Petrel is currently severely restricted from historical levels to extreme elevations within Haleakala National Park. Probability models such as ours can be useful in delineating suitable habitat patches where, in this case, Dark-rumped Petrel burrows have a higher probability of being found. This approach is powerful because it can make use of remotely sensed and stored data sets to direct and refine on-the-ground searches. C1 UNIV WASHINGTON, FISHERIES RES INST, SEATTLE, WA 98195 USA. HALEAKALA NATL PK, NATL PK SERV, COOPERAT PK STUDIES, MAKAWAO, HI 96768 USA. RP Brandt, CA (reprint author), PACIFIC NW LAB, POB 999, MAIL STOP K6-09, RICHLAND, WA 99352 USA. NR 22 TC 24 Z9 24 U1 2 U2 4 PU AMER ORNITHOLOGISTS UNION PI LAWRENCE PA ORNITHOLOGICAL SOC NORTH AMER PO BOX 1897, LAWRENCE, KS 66044-8897 SN 0004-8038 J9 AUK JI AUK PD JUL PY 1995 VL 112 IS 3 BP 571 EP 579 PG 9 WC Ornithology SC Zoology GA TZ356 UT WOS:A1995TZ35600003 ER PT J AU He, XY Dembo, M AF He, XY Dembo, M TI Modeling chemoattractant-elicited relocalization of myosin filaments in Dictyostelium SO BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE LA English DT Article DE cytoskeleton; amoeboid motility; chemotaxis; Dictyostelium; myosin ID HEAVY-CHAIN GENE; CELL MOTILITY; CYCLIC-AMP; DISCOIDEUM; PHOSPHORYLATION; CYTOSKELETON AB Dictyostelium myosin is able to assemble into filaments that, when visualized under normal conditions, appear to be uniformly distributed throughout the cytoplasm. After stimulation by the chemoattractant cAMP, these filaments quickly diminish in the cellular medulla and accumulate in the cortex. A general hypothesis to explain the mechanism of this relocalization proposes that one or more of the chemical coefficients governing filament polymerization is precisely regulated by some sort of intracellular second messenger. To investigate this hypothesis we formulated a simple theoretical model of myosin polymerization and then used this model to analyze the resting state of the cell and various scenarios for initializing a transition to the activated state. In general, we found that the relocalization of filaments could be realized if a second messenger increased the elongation and (or) the nucleation coefficients for filament assembly in cortical ectoplasm and (or) if the messenger decreased these parameters in the cellular medulla. By comparing these limiting cases with experimental observations, we concluded that models in which redistribution of myosin is achieved by decreasing filament stability in the medulla are the most likely candidates. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,THEORET BIOL & BIOPHYS GRP,LOS ALAMOS,NM 87545. RI Dembo, Micah/C-2755-2013 FU NIAID NIH HHS [R01-AI21002] NR 22 TC 0 Z9 0 U1 0 U2 2 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0829-8211 J9 BIOCHEM CELL BIOL JI Biochem. Cell Biol. PD JUL-AUG PY 1995 VL 73 IS 7-8 BP 421 EP 429 PG 9 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA TT603 UT WOS:A1995TT60300012 PM 8703414 ER PT J AU LEW, VL RAFTOS, JE SORETTE, M BOOKCHIN, RM MOHANDAS, N AF LEW, VL RAFTOS, JE SORETTE, M BOOKCHIN, RM MOHANDAS, N TI GENERATION OF NORMAL HUMAN RED-CELL VOLUME, HEMOGLOBIN CONTENT, AND MEMBRANE AREA DISTRIBUTIONS BY BIRTH OR REGULATION SO BLOOD LA English DT Article ID ION-CONTENT REGULATION; LIGHT-SCATTERING; ERYTHROCYTES; TRANSPORT; DENSITY; LEUKOCYTES; SEPARATION; ACCURATE; REMOVAL; ANEMIA AB Using flow cytometry and osmotic lysis measurements, we document here the means and coefficients of variation of the following red cell (RBC) properties: hemoglobin (Hb) content, volume, Hb concentration, and relative lytic tonicity distributions in populations of normal human RBCs, before and after density fractionation. The distributions showed a pattern characterized by much larger coefficients of variation of the Hb content and volume distributions than of the Hb concentration and relative lytic tonicity distributions. From analysis of the factors that determine those RBC properties, the patterns were interpreted as reflecting previously unrecognized statistical proportionalities between cell osmolyte content, Hb content, and membrane area. The possible origin of these statistical links was analyzed by considering alternative models with and without the participation of regulatory processes during cell maturation. A model was shown to be feasible in which mature RBC variability with proportional volume, area, and Hb content arises solely from cell size variability at the last erythroid cell division. (C) 1995 by The American Society of Hematology. C1 MONASH UNIV,DEPT PHYSIOL,CLAYTON,VIC 3168,AUSTRALIA. MILES INC,TARRYTOWN,NY. ALBERT EINSTEIN COLL MED,BRONX,NY 10467. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. RP LEW, VL (reprint author), UNIV CAMBRIDGE,PHYSIOL LAB,DOWNING ST,CAMBRIDGE CB2 3EG,ENGLAND. FU NHLBI NIH HHS [HL28018, HL28905, HL32095]; Wellcome Trust NR 19 TC 56 Z9 59 U1 0 U2 5 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 JUL 1 PY 1995 VL 86 IS 1 BP 334 EP 341 PG 8 WC Hematology SC Hematology GA RF984 UT WOS:A1995RF98400042 PM 7795242 ER PT J AU DIAS, NL BRUTSAERT, W WESELY, ML AF DIAS, NL BRUTSAERT, W WESELY, ML TI Z-LESS STRATIFICATION UNDER STABLE CONDITIONS SO BOUNDARY-LAYER METEOROLOGY LA English DT Article ID ATMOSPHERIC SURFACE-LAYER; TURBULENT KINETIC-ENERGY; TEMPERATURE VARIANCE; BOUNDARY-LAYER; BUDGET; FIELD; MOMENTUM; FLUXES; HEAT AB Turbulent fluctuations were measured at a height of 2.5 m in stable conditions over grass to investigate the variability of the second- and third-order moments involving temperature, humidity and vertical wind velocity. With the exception of the normalized second moment of temperature, very little variation of the normalized moments was found with changes in the dimensionless stability parameter zeta = z/L, where L is the Obukhov stability length. Such limited variation is expected for stable conditions, and the normalized second moment of temperature might have been affected by nonstationary conditions. In addition, the variability of the normalized moments was lessened by computing the turbulence statistics over 56 min, instead of 26 min. Values of third-order moments involving the vertical velocity were all dose to zero. C1 CORNELL UNIV, SCH CIVIL & ENVIRONM ENGN, ITHACA, NY 14850 USA. ARGONNE NATL LAB, DIV ENVIRONM RES, ARGONNE, IL 60439 USA. RP FED UNIV PARANA, CEHPAR, CAIXA POSTAL 1309, BR-80001970 CURITIBA, PARANA, BRAZIL. NR 42 TC 27 Z9 27 U1 0 U2 6 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0006-8314 EI 1573-1472 J9 BOUND-LAY METEOROL JI Bound.-Layer Meteor. PD JUL PY 1995 VL 75 IS 1-2 BP 175 EP 187 DI 10.1007/BF00721048 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA RV039 UT WOS:A1995RV03900007 ER PT J AU FAULKNER, D FISK, WJ SULLIVAN, DP AF FAULKNER, D FISK, WJ SULLIVAN, DP TI INDOOR AIR-FLOW AND POLLUTANT REMOVAL IN A ROOM WITH FLOOR-BASED TASK VENTILATION - RESULTS OF ADDITIONAL EXPERIMENTS SO BUILDING AND ENVIRONMENT LA English DT Article AB A laboratory-based study of the performance of a floor-based task ventilation system designed for use in office buildings has been completed. With the task ventilation system, occupants can adjust the flow rare and direction of air supplied to their work space through floor-mounted supply grilles. Air exits the ventilated space through a ceiling-mounted return grille. To study indoor airflow patterns, the age of air at multiple indoor locations was measured using the tracer gas step-up procedure. To study the intra-room transport of tobacco smoke particles, cigarettes were smoked mechanically in one workstation and particle concentrations were measured at multiple indoor locations. Test variables included supply flow rates, temperatures, supply directions, and internal heat loads. Multiple floor supply units were in operation simultaneously. During all tests, the ventilation system supplied 100% outside air. Our major findings are as follows. (1) Deviations from a uniform age of air, and a uniform particle concentration, were generally less than 30%. (2) With two floor-supply units operating and supply air directed toward the occupant, the age of air in the breathing zone was about 20-40% less than the age of air that would occur in the room if the air was perfectly mixed. (3) With two floor-supply units operating, the air appears to travel from the floor to the ceiling in a piston-like flow pattern. (4) With three floor-supply units operating, a two-zone flow pattern, with a piston-like flow in the lower region of the room and mixing in the upper region, was evident at some operating conditions. (5) A strong (r(2) = 0.81) correlation was found between the rate of change in the average age of air with height and two factors hypothesized to be determinants of the indoor airflow pattern. (6) Workstations without a cigarette smoking machine and with an operating task ventilation system were not significantly protected from tobacco smoke in an adjacent workstation. RP FAULKNER, D (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,INDOOR ENVIRONM PROGRAM,BERKELEY,CA 94720, USA. NR 0 TC 21 Z9 22 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-1323 J9 BUILD ENVIRON JI Build. Environ. PD JUL PY 1995 VL 30 IS 3 BP 323 EP 332 DI 10.1016/0360-1323(94)00051-S PG 10 WC Construction & Building Technology; Engineering, Environmental; Engineering, Civil SC Construction & Building Technology; Engineering GA RE761 UT WOS:A1995RE76100002 ER PT J AU KEELAND, BD SHARITZ, RR AF KEELAND, BD SHARITZ, RR TI SEASONAL GROWTH-PATTERNS OF NYSSA-SYLVATICA VAR BIFLORA, NYSSA-AQUATICA, AND TAXODIUM-DISTICHUM AS AFFECTED BY HYDROLOGIC REGIME SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Article ID SOUTHERN ILLINOIS; TREE GROWTH; L RICH; SWAMP; LOUISIANA; CYPRESS; PRODUCTIVITY; LITTERFALL; VEGETATION; WETLANDS AB Hydrologic regime is a major influence on the growth of wetland plants. We examined seasonal growth patterns of three wetland tree species, Nyssa sylvatica var. biflora (Waiter) Sargent, Nyssa aquatica L., and Taxodium distichum (L.) Rich., to determine responses to variations in hydrologic regime. Five study sites were chosen in two river-floodplain swamps to represent a gradient of hydrologic regimes, and the weekly changes in diameter of over 600 mature trees at these sites were measured with dendrometer bands throughout two growing seasons. Total growth, time of growth cessation, and length of the growth phase of canopy trees of all three species differed significantly among hydrologic regimes. Nyssa sylvatica var. biflora and N. aquatica achieved greatest growth under deep periodic flooding. Maximum growth of T. distichum occurred with shallow permanent flooding. Subcanopy trees differed less among hydrologic regimes than canopy trees. These results suggest that modifications of natural hydrologic regimes can cause short-term changes in tree growth and have long-term effects on the dynamics of forested wetlands. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. NR 70 TC 16 Z9 20 U1 1 U2 6 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 JUL PY 1995 VL 25 IS 7 BP 1084 EP 1096 PG 13 WC Forestry SC Forestry GA RT505 UT WOS:A1995RT50500006 ER PT J AU BURGDORFER, J YANG, XZ MULLER, J AF BURGDORFER, J YANG, XZ MULLER, J TI PARAMETRIC VARIATION OF RESONANCES FOR REGULAR AND CHAOTIC SCATTERING SO CHAOS SOLITONS & FRACTALS LA English DT Article ID POSITIVE-ENERGY SPECTRUM; DOUBLY-EXCITED HELIUM; MAGNETIC-FIELD; AVOIDED CROSSINGS; ELECTRIC-FIELD; HYDROGEN-ATOM; CONDUCTANCE FLUCTUATIONS; STATISTICAL PROPERTIES; IRREGULAR SCATTERING; ISOELECTRONIC SERIES AB We study the trajectories of resonances in the complex energy plane as a function of a control parameter for simple systems whose classical counterparts are regular and chaotic. We analyze the influence of the classical phase space structure on the parametric variations of resonances. We employ both the Pechukas-type equations of motion as well as periodic orbit quantization. Examples considered include hydrogen in a strong electric field, the hydrogen atom in a strong magnetic field, and doubly excited resonances in the isoelectronic sequence of helium. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP BURGDORFER, J (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 86 TC 14 Z9 14 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-0779 J9 CHAOS SOLITON FRACT JI Chaos Solitons Fractals PD JUL PY 1995 VL 5 IS 7 BP 1235 EP 1273 DI 10.1016/0960-0779(94)E0064-V PG 39 WC Mathematics, Interdisciplinary Applications; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA RG851 UT WOS:A1995RG85100014 ER PT J AU PEURRUNG, LM RASHIDI, M KULP, TJ AF PEURRUNG, LM RASHIDI, M KULP, TJ TI MEASUREMENT OF POROUS-MEDIUM VELOCITY-FIELDS AND THEIR VOLUMETRIC AVERAGING CHARACTERISTICS USING PARTICLE TRACKING VELOCIMETRY SO CHEMICAL ENGINEERING SCIENCE LA English DT Article ID IMAGE VELOCIMETRY; TURBULENT-FLOW; CHANNEL FLOWS; MOTIONS AB The application of a new method for measuring velocity fields within a porous medium is presented. Fluid containing fluorescent microspheres is flowed through a transparent, refractive-index-matched column filled with 3.1 mm spherical beads. A planar laser beam illuminates a cross-section of the bed. Using a video camera and a frame-accurate videocassette recorder, the motions of the fluorescing particles are recorded as the fluid flows through the bed. Subsequently, the particles are tracked through a series of frames using a commercial image analysis software package. Because the particles move slowly compared to the video frame rate (30 frames per second), frame-to-frame particle identification is unambiguous. The time histories of the particle positions are used to calculate velocity components in the plane of the beam. Results are shown in which the velocity field within a full volumetric segment of a column is measured, and the averaging properties of the measured velocity field are discussed. The volumetrically averaged velocities are shown to be in good agreement with the superficial velocity. This technique is easy to automate and can be used to measure a wide range of velocities with high precision. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 14 TC 33 Z9 33 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0009-2509 J9 CHEM ENG SCI JI Chem. Eng. Sci. PD JUL PY 1995 VL 50 IS 14 BP 2243 EP & DI 10.1016/0009-2509(94)00509-P PG 0 WC Engineering, Chemical SC Engineering GA RJ218 UT WOS:A1995RJ21800006 ER PT J AU MARSCH, GA GOLDMAN, EN FULTZ, E SHEN, NH TURTELTAUB, KW AF MARSCH, GA GOLDMAN, EN FULTZ, E SHEN, NH TURTELTAUB, KW TI HETEROGENEOUS DNA ADDUCT FORMATION IN-VITRO BY THE ACETYLATED FOOD MUTAGEN 2-(ACETOXYAMINO)-1-METHYL-6-PHENYLIMIDAZO[4,5-B]PYRIDINE - A FLUORESCENCE SPECTROSCOPIC STUDY SO CHEMICAL RESEARCH IN TOXICOLOGY LA English DT Article ID P-32 POSTLABELING ANALYSIS; 2-AMINO-1-METHYL-6-PHENYLIMIDAZO<4,5-B>PYRIDINE PHIP; COOKED-BEEF; IDENTIFICATION; BENZOPYRENE; EPOXIDE; CARCINOGEN; 2'-DEOXYGUANOSINE; GENOTOXICITY; SENSITIVITY AB The food mutagen 2-amino-1-methyl-6-phenylimidazo [4,5-b]pyridine (PhIP) forms adducts to DNA guanine bases at the C-8 position. No other DNA adduction site has been verified for PhIP, nor has any experimental data been collected on the conformation of the PhIP-DNA covalent complex. To determine if multiple PhIP-DNA adduct species exist, or if PhIP-DNA adducts assume multiple conformations, 2-(acetoxyamino)-1-methyl-6-phenylimidazo [4,5-b]-pyridine (N-acetoxy-PhIP) was reacted with calf thymus DNA, followed by an evaluation of the resulting adduct complexes by fluorescence spectroscopy. Approximately 20% of the N-acetoxy-PhIP formed covalent complexes with DNA. Two major and several minor spots were observed by P-32-postlabeling, suggesting a minimum of two major adduct species. UV/vis spectra of the PhIP-modified DNA also showed heterogeneous formation of PhIP-DNA adducts. Fluorescence excitation and emission spectroscopy with or without fluorescence quenching (silver ion and acrylamide) was used to evaluate the number of adducts formed, and the low-resolution conformation of each adduct. Four adduct fluorophores were observed and assigned the nomenclature PAi, where ''PA'' denotes PhIP Adduct and i = 1-4 in order of fluorescence emission band energies, with 1 the highest and 4 the lowest energy, respectively. Excitation maxima for the adduct fluorophores ranged from 340 to 370 nm, and emission maxima ranged from 390 to 420 nm. The fluorescence from adduct PA1 was quenched by silver but not acrylamide, suggesting a helix-internal configuration. Adduct PA2 fluorescence was strongly enhanced upon silver binding but was not affected by acrylamide, also indicating that this adduct was internal. The fluorescence from adducts PA3 and PA4 was quenched by acrylamide but not silver; thus PA2 and PA3 were tentatively assigned as solvent-accessible. These data are the first suggesting heterogeneous formation of PhIP adducts to intact DNA, but we cannot as yet determine how many chemical species of adduct are formed or if a given species exists in multiple conformations. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. FU NCI NIH HHS [CA55861] NR 56 TC 8 Z9 8 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0893-228X J9 CHEM RES TOXICOL JI Chem. Res. Toxicol. PD JUL-AUG PY 1995 VL 8 IS 5 BP 659 EP 670 DI 10.1021/tx00047a005 PG 12 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Toxicology SC Pharmacology & Pharmacy; Chemistry; Toxicology GA RJ225 UT WOS:A1995RJ22500005 PM 7548748 ER PT J AU LOY, DA SHEA, KJ AF LOY, DA SHEA, KJ TI BRIDGED POLYSILSESQUIOXANES - HIGHLY POROUS HYBRID ORGANIC-INORGANIC MATERIALS SO CHEMICAL REVIEWS LA English DT Review ID SOL-GEL PROCESS; GLASSES; SILICA; POLYMERS; BEHAVIOR; TETRAETHOXYSILANE; POLYCONDENSATION; POLYMERIZATION; DERIVATIVES; HYDROLYSIS C1 UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. RP LOY, DA (reprint author), SANDIA NATL LABS,DEPT PROPERTIES ORGAN MAT,TECH STAFF,POB 5800,ALBUQUERQUE,NM 87185, USA. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 88 TC 782 Z9 799 U1 11 U2 110 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0009-2665 J9 CHEM REV JI Chem. Rev. PD JUL-AUG PY 1995 VL 95 IS 5 BP 1431 EP 1442 DI 10.1021/cr00037a013 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA RN295 UT WOS:A1995RN29500014 ER PT J AU LASZLO, P PETRAKIS, L AF LASZLO, P PETRAKIS, L TI A RISKY BUSINESS SO CHEMISTRY IN BRITAIN LA English DT Article C1 UNIV LIEGE,LIEGE,BELGIUM. ECOLE POLYTECH,F-91128 PALAISEAU,FRANCE. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 16 TC 0 Z9 0 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0009-3106 J9 CHEM BRIT JI Chem. Br. PD JUL PY 1995 VL 31 IS 7 BP 555 EP 556 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA RG586 UT WOS:A1995RG58600053 ER PT J AU JONES, TD AF JONES, TD TI USE OF BIOASSAYS IN ASSESSING HEALTH-HAZARDS FROM COMPLEX-MIXTURES - A RASH ANALYSIS SO CHEMOSPHERE LA English DT Article ID EXHAUSTS AB The Finney harmonic mean model for joint toxicity of ingredients in mixtures can be used to estimate the toxicity of the neat compound if each component can be substituted in potency-adjusted-doses for any of the other components. Chemical analysis of constituent substances and their associated concentrations and relative toxicological potency values (computed according to the RApid Screening of Hazard (RASH) method). were used to compare the toxicities as predicted from ingredients of cigarette smoke, PAHs in diesel exhaust, asphalt, coal tar, pitch, and creosote with the measured toxicities of the corresponding neat mixtures. Accuracy for cigarette smoke condensate, coal tar, pitch, and creosote were within a factor of three based on the PAH fraction; asphalt was within a factor of 18; but the PAH fraction of diesel particulate was again found to be inadequate to describe the composite toxicity of diesel emissions. RP JONES, TD (reprint author), OAK RIDGE NATL LAB,BLDG 4500-S,MS 6101,POB 2008,OAK RIDGE,TN 37831, USA. NR 14 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 0045-6535 J9 CHEMOSPHERE JI Chemosphere PD JUL PY 1995 VL 31 IS 1 BP 2475 EP 2484 DI 10.1016/0045-6535(95)00117-Q PG 10 WC Environmental Sciences SC Environmental Sciences & Ecology GA RL949 UT WOS:A1995RL94900006 PM 7545524 ER PT J AU MCGRATH, JJ AF MCGRATH, JJ TI THE CEO AS IMAGE MAKER SO CHEMTECH LA English DT Article RP MCGRATH, JJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 6 TC 2 Z9 3 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0009-2703 J9 CHEMTECH JI Chemtech PD JUL PY 1995 VL 25 IS 7 BP 48 EP 52 PG 5 WC Chemistry, Applied SC Chemistry GA RL577 UT WOS:A1995RL57700017 ER PT J AU NATH, J TUCKER, JD HANDO, JC AF NATH, J TUCKER, JD HANDO, JC TI Y-CHROMOSOME ANEUPLOIDY, MICRONUCLEI, KINETOCHORES AND AGING IN MEN SO CHROMOSOMA LA English DT Article ID CENP-B; CENTROMERE PROTEINS; HUMAN-LYMPHOCYTES; AGE; DNA; IMMUNOFLUORESCENCE; IDENTIFICATION; LOCALIZATION; INDIVIDUALS; ASSAY AB This investigation was conducted to determine the relationship between Y chromosome loss and increased micronucleus formation with age, We also investigated the status of kinetochore proteins in the micronuclei. Umbilical cord blood samples were obtained from 18 newborn males, and peripheral blood was obtained from 35 adult males ranging in age from 22 to 79 years. Isolated lymphocytes from all 53 donors were cultured and blocked with cytochalasin B. Two thousand binucleate cells per donor were scored using a modified micronucleus assay to determine the kinetochore status of each micronucleus. This assay showed 23.8% of the micronuclei to be kinetochore-positive, while 76.2% of the micronuclei were kinetochore-negative. Cells were then hybridized with a 3.56-kb biotinylated Y chromosome-specific probe. All micronucleate cells were relocated and their Y probe status was determined. A significant increase in Y-bearing micronuclei with age was observed. Metaphase cells from the same samples were analyzed for the presence or absence of Y chromosome. The relationship between Y chromosome-positive micronuclei and Y chromosome-negative metaphase cells was highly significant, suggesting that Y chromosome-deficient metaphase cells result from cells which had previously lost a Y chromosome due to micronucleation. The cause of micronucleus formation from a lagging Y chromosome appears probably to be either a faulty or a diminished amount of kinetochore protein. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. RP NATH, J (reprint author), W VIRGINIA UNIV,COLL AGR & FORESTRY,GENET & DEV BIOL PROGRAM,POB 6108,MORGANTOWN,WV 26506, USA. NR 38 TC 70 Z9 73 U1 1 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0009-5915 J9 CHROMOSOMA JI Chromosoma PD JUL PY 1995 VL 103 IS 10 BP 725 EP 731 DI 10.1007/BF00344234 PG 7 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA RN820 UT WOS:A1995RN82000009 PM 7664620 ER PT J AU BOYD, JK AF BOYD, JK TI ELECTROSTATIC SCALAR POTENTIAL AND ELECTRIC-FIELD SOLUTION OF AN AXISYMMETRICAL ACCELERATOR GAP SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article AB A computationally efficient formulation of the solution for the electric potential and field due to an axisymmetric accelerator gap is derived. The potential solution is obtained from an accurate integration of the Green function integral solution of Laplace's equation. This result provides information about the focusing properties of a gap, and can be used to obtain forces needed in particle transport codes. RP BOYD, JK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 12 TC 0 Z9 0 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 JUL PY 1995 VL 88 IS 1 BP 23 EP 42 DI 10.1016/0010-4655(95)00033-C PG 20 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA RG616 UT WOS:A1995RG61600002 ER PT J AU HOWARTH, RB SANSTAD, AH AF HOWARTH, RB SANSTAD, AH TI DISCOUNT RATES AND ENERGY EFFICIENCY SO CONTEMPORARY ECONOMIC POLICY LA English DT Article; Proceedings Paper CT Western-Economic-Association-International 69th Annual Conference CY JUN-JUL -, 1994 CL VANCOUVER, CANADA SP W Econ Assoc Int AB Empirical studies provide compelling evidence that economic agents do Mot adopt the complete range of energy-efficient technologies that are cost-effective under prevailing prices and market conditions. Analysts commonly attribute this anomaly to the use of high discount rates in energy-related decisions-an interpretation that is difficult to reconcile with standard models of rational choice. This paper recasts the controversy from the perspective of economic theory and finds that market failures related to asymmetric information, bounded rationality, and transaction costs are major contributors to the so-called ''efficiency gap.'' C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP HOWARTH, RB (reprint author), UNIV CALIF SANTA CRUZ,ENVIRONM STUDIES PROGRAM,SANTA CRUZ,CA 95064, USA. OI Howarth, Richard/0000-0003-3182-7345 NR 35 TC 61 Z9 62 U1 0 U2 11 PU WESTERN ECONOMIC ASSOC INT PI HUNTINGTON BEACH PA 7400 CENTER AVE SUITE 109, HUNTINGTON BEACH, CA 92647-3039 SN 0735-0007 J9 CONTEMP ECON POLICY JI Contemp. Econ. Policy PD JUL PY 1995 VL 13 IS 3 BP 101 EP 109 PG 9 WC Economics; Public Administration SC Business & Economics; Public Administration GA RK357 UT WOS:A1995RK35700009 ER PT J AU DUNBAR, NW JACOBS, GK NANEY, MT AF DUNBAR, NW JACOBS, GK NANEY, MT TI CRYSTALLIZATION PROCESSES IN AN ARTIFICIAL MAGMA - VARIATIONS IN CRYSTAL SHAPE, GROWTH-RATE AND COMPOSITION WITH MELT COOLING HISTORY SO CONTRIBUTIONS TO MINERALOGY AND PETROLOGY LA English DT Article ID ROCKS; NUCLEATION; SYSTEMS; LAVA AB A large (4.8 m(3), 1.3 x 10(7) g) artificial mafic melt with a bulk composition similar to that of a basalt (but with a high CaO content of 17 wt %) was generated during a demonstration of in situ vitrification and was allowed to cool naturally. During the melting process, convection was vigorous, resulting in a chemically and thermally homogeneous melt body. Once heating was complete, the cooling rate was rapid with the temperature dropping from 1500 degrees C to 500 degrees C in similar to 6 days within the interior of the 3 m diameter, 1.5 m thick body. A similar to 20 h period of constant temperature (1140 degrees C) observed during cooling was the result of latent heat released by widespread crystallization. The final crystalline assemblage consists of diopsidic to hedenbergitic pyroxene and anorthitic feldspar, with a subordinate amount of potassic feldspar, plus a small amount of evolved glass. The compositions and proportions of phases agree well with those predicted by the MELTS thermodynamic model. Thermal and textural evidence suggest that convection within the melt ceased coincident with formation of the first crystals. Textural investigation of core samples reveals large (up to 1 cm in length) acicular diopsidic pyroxenes in a matrix of smaller feldspar and zoned pyroxene crystals (similar to 500 mu m in length). Crystal shape and pyroxene composition vary as a function of position within the solidified body, as a function of cooling rate. Both crystal size and degree of crystallinity are highest in the central, most slowly-cooled parts of the rock. Crystal shape is characterized by tabular, equilibrium-growth forms in the slowly-cooled areas, grading to highly skeletal, dendritic forms at the rapidly-cooled edges of the body. The pyroxene crystals are dominantly homogeneous diopside, but crystals are characterized by thin Fe-rich hedenbergitic rims. These rims were deposited when Mg in the melt was depleted by diopside growth, and melt temperature had cooled sufficiently to allow Fe-rich pyroxene growth. Crystal growth rates can be calculated based on thermal behavior of the melt, reinforced by thermodynamic modelling, and are determined to be between 10(-7) and 10(-8) cm/s in the central part of the melt. These estimates agree well with growth rates in natural systems with similar cooling rates. Pyroxene crystals that formed at a higher cooling rates are characterized by higher Al and lower Mg contents relative to tabular equilibrium crystalline forms, presumably as a result of disequilibrium melt compositions at the crystal-melt interface. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 35 TC 24 Z9 24 U1 2 U2 5 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0010-7999 J9 CONTRIB MINERAL PETR JI Contrib. Mineral. Petrol. PD JUL PY 1995 VL 120 IS 3-4 BP 412 EP 425 DI 10.1007/BF00306518 PG 14 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA RN821 UT WOS:A1995RN82100014 ER PT J AU BECKMAN, RJ SALZMAN, GC STEWART, CC AF BECKMAN, RJ SALZMAN, GC STEWART, CC TI CLASSIFICATION AND REGRESSION TREES FOR BONE-MARROW IMMUNOPHENOTYPING SO CYTOMETRY LA English DT Article DE CART; MULTIVARIATE ANALYSIS; CLUSTER ANALYSIS; FLOW CYTOMETRY AB Methods are needed to assist with automating three-color now cytometric immunophenotyping of bone marrow from leukemia patients. Described is a method in which a normal bone marrow data set is used as a template against which to compare leukemic bone marrow data sets. This template is obtained using techniques of cluster analysis and cluster editing. Leukemic cells often inappropriately express antigens and appear in a different part of the multivariate data space than normal cells. To recognize the cells exhibiting inappropriate antigen expression, an artificial cluster of ''cells'' is added to the normal template. The ''cells'' in this cluster fill the space not occupied by normal cells. Classification and regression tree (CART) analysis is used to train a classifier that can then be used to isolate the major cell types and the inappropriate expression cells in a leukemic bone marrow specimen. (C) 1995 Wiley-Liss, Inc. C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. ROSWELL PK CANC INST,FLOW CYTOMETRY LAB,BUFFALO,NY 14263. RP BECKMAN, RJ (reprint author), LOS ALAMOS NATL LAB,DIV ANAL & ASSESSMENT,MAIL STOP F600,LOS ALAMOS,NM 87545, USA. FU NCI NIH HHS [CA54518]; NCRR NIH HHS [RR01315] NR 10 TC 18 Z9 20 U1 0 U2 3 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0196-4763 J9 CYTOMETRY JI Cytometry PD JUL 1 PY 1995 VL 20 IS 3 BP 210 EP 217 DI 10.1002/cyto.990200304 PG 8 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA RG237 UT WOS:A1995RG23700003 PM 7587706 ER PT J AU PLASIL, F AF PLASIL, F TI NUCLEUS-NUCLEUS COLLISIONS AT ULTRA-RELATIVISTIC ENERGIES - STATUS AND PROSPECTS SO CZECHOSLOVAK JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT International School-Workshop for Young Physicists on Relativistic Heavy-Ion Physics CY SEP 19-23, 1994 CL PRAGUE, CZECH REPUBLIC SP Inst Nucl Phys, Rez Prague, Charles Univ Prague, Fac Math & Phys ID ION EXPERIMENT WA80; TRANSVERSE ENERGY; DISTRIBUTIONS; CALORIMETER; CERN AB Physics with ultra-relativistic heavy ions at three different accelerators SPS at CERN and AGS and RHIC at BNL is reviewed. The physics discussed ranges from global event characteristics through direct photon production, proton-proton correlation studies to Quark Gluon Plasma (QGP) phase trasition signatures via dileptonic, photonic and hadronic signals. RP PLASIL, F (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 21 TC 0 Z9 0 U1 0 U2 0 PU CZECHOSLOVAK JNL OF PHYSICS PI PRAGUE PA FYZIKALNI USTAV AV NA SLOVANCE 2, PRAGUE, CZECH REPUBLIC 180 40 SN 0011-4626 J9 CZECH J PHYS JI Czech. J. Phys. PD JUL-AUG PY 1995 VL 45 IS 7-8 BP 553 EP 578 DI 10.1007/BF01688545 PG 26 WC Physics, Multidisciplinary SC Physics GA RP856 UT WOS:A1995RP85600004 ER PT J AU MORETTO, LG JING, KX PHAIR, L TSO, K WOZNIAK, GJ AF MORETTO, LG JING, KX PHAIR, L TSO, K WOZNIAK, GJ TI COMPLEX FRAGMENT EMISSION FROM LOW-ENERGY COMPOUND NUCLEUS DECAY TO MULTIFRAGMENTATION SO CZECHOSLOVAK JOURNAL OF PHYSICS LA English DT Article; Proceedings Paper CT International School-Workshop for Young Physicists on Relativistic Heavy-Ion Physics CY SEP 19-23, 1994 CL PRAGUE, CZECH REPUBLIC SP Inst Nucl Phys, Rez Prague, Charles Univ Prague, Fac Math & Phys ID HEAVY-ION COLLISIONS; STATISTICAL MULTIFRAGMENTATION; NEUTRON EMISSION; FUSION-FISSION; TIME-SCALES; HOT NUCLEI; DYNAMICS; BARRIERS AB In the first of these lectures, the experimental emission probabilities of complex fragments by low energy compound nuclei and their dependence upon energy and Z value are compared to the transtion state rates. In the second part, the high energy multi-fragment emission probabilities are shown to be reducible to the single fragment emission probability through the binomial distribution. The extracted one-fragment emission probabilities have a thermal dependence of the form p = e(-B/T). This suggests that multifragmentation is a sequence of thermal binary decays. RP MORETTO, LG (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 44 TC 0 Z9 0 U1 0 U2 0 PU CZECHOSLOVAK JNL OF PHYSICS PI PRAGUE PA FYZIKALNI USTAV AV NA SLOVANCE 2, PRAGUE, CZECH REPUBLIC 180 40 SN 0011-4626 J9 CZECH J PHYS JI Czech. J. Phys. PD JUL-AUG PY 1995 VL 45 IS 7-8 BP 611 EP 623 DI 10.1007/BF01688548 PG 13 WC Physics, Multidisciplinary SC Physics GA RP856 UT WOS:A1995RP85600007 ER PT J AU DEANGELIS, DL LOREAU, M NEERGAARD, D MULHOLLAND, PJ MARZOLF, ER AF DEANGELIS, DL LOREAU, M NEERGAARD, D MULHOLLAND, PJ MARZOLF, ER TI MODELING NUTRIENT-PERIPHYTON DYNAMICS IN STREAMS - THE IMPORTANCE OF TRANSIENT STORAGE ZONES SO ECOLOGICAL MODELLING LA English DT Article DE FRESH-WATER ECOSYSTEMS; NUTRIENTS; PERIPHYTON ID NITRATE AB The dynamics of a nutrient-limited periphyton community in a segment of stream was modeled. The stream segment was assumed to consist of two zones, free-flowing water and a boundary zone of zero water flow, which acted as a transient storage zone for nutrients. Studies with a biologically unreactive tracer solute (sodium chloride) were used to obtain parameters for diffusion of solute into the transient storage zone. Two simple alternative functional responses representing nutrient-limited periphyton growth were formulated, one with only nutrient limitation on periphyton growth and one that additionally included density-dependent limitation of periphyton growth. Attempts to fit the two alternative functional responses for periphyton growth and to predict nutrient levels in the transient storage zone showed that the two alternatives had very different implications for the steady state and dynamics of the storage zone. Empirical studies of periphyton biomass and nutrient turnover give support for the second alternative function. The model results suggests some additional experiments that can be performed to test the two alternatives. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. FREE UNIV BRUSSELS,DEPT ANIM BIOL,BRUSSELS,BELGIUM. UNIV TENNESSEE,GRAD PROGRAM ECOL,KNOXVILLE,TN 37996. RI Mulholland, Patrick/C-3142-2012 NR 6 TC 34 Z9 35 U1 1 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3800 J9 ECOL MODEL JI Ecol. Model. PD JUL PY 1995 VL 80 IS 2-3 BP 149 EP 160 DI 10.1016/0304-3800(94)00066-Q PG 12 WC Ecology SC Environmental Sciences & Ecology GA RE225 UT WOS:A1995RE22500004 ER PT J AU RISCH, TS DOBSON, FS MURIE, JO AF RISCH, TS DOBSON, FS MURIE, JO TI IS MEAN LITTER SIZE THE MOST PRODUCTIVE - A TEST IN COLUMBIAN GROUND-SQUIRRELS SO ECOLOGY LA English DT Article DE BAD-YEARS EFFECT; CLIFF EDGE EFFECT; COSTS OF REPRODUCTION; INDIVIDUAL OPTIMIZATION; LACKS HYPOTHESIS; LIFE HISTORY; LITTER SIZE; SPERMOPHILUS ID LIFE-HISTORY PATTERNS; CLUTCH-SIZE; SPERMOPHILUS-COLUMBIANUS; BROOD SIZE; VARIABLE ENVIRONMENT; REPRODUCTIVE SUCCESS; POPULATION-DYNAMICS; BREEDING SUCCESS; FOOD RESOURCES; CANADA GEESE AB We studied the evolution of litter size in natural and experimentally manipulated populations of Columbian ground squirrels (Spermophilus columbianus) in eastern Washington state and southwest Alberta. Litter size at weaning in a large natural population (mean = 3.51 pups/litter, 248 litters) was significantly lower than the litter size (6 pups) that produced the most offspring surviving to yearling age class. This evidence contradicted Lack's ''optimal litter size'' hypothesis, which predicts that the most productive litter size should approximate the mean. Litter size had no significant effect on the subsequent survival or reproduction of mothers, contrary to the negative effects predicted by the ''cost of reproduction'' hypothesis. Litter success varied among years, and good and bad years for reproduction could be experimentally simulated with food supplementations. However, small samples of the largest litters rendered the ''bad-years'' hypothesis inappropriate for application to our data. Proportional survival of offspring was relatively constant among different litter sizes, contrary to the necessary condition of the ''cliff edge'' hypothesis of a dramatic decrease in survival of young from the largest litters. The data supported the ''individual optimization'' hypothesis most strongly. As predicted, the number of surviving offspring increased with litter size, although in one population the six largest litters (2.4% of 248 litters) suffered reduced success. In natural and food-supplemented populations, changes in maternal body mass were associated with changes in litter size (r = 0.205 to 0.926). Because survival of young remained relatively constant as litter size increased, these correlations resulted in greater offspring success for mothers in better body condition. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. AUBURN UNIV,ALABAMA AGR EXPT STN,AUBURN,AL 36849. UNIV ALBERTA,DEPT ZOOL,EDMONTON,AB T6G 2E9,CANADA. RP RISCH, TS (reprint author), AUBURN UNIV,DEPT ZOOL & WILDLIFE SCI,AUBURN,AL 36849, USA. RI Murie, Jan/F-3663-2014 NR 84 TC 38 Z9 39 U1 1 U2 7 PU ECOLOGICAL SOC AMER PI TEMPE PA ARIZONA STATE UNIV CENTER ENVIRONMENTAL STUDIES, TEMPE, AZ 85287 SN 0012-9658 J9 ECOLOGY JI Ecology PD JUL PY 1995 VL 76 IS 5 BP 1643 EP 1654 DI 10.2307/1938165 PG 12 WC Ecology SC Environmental Sciences & Ecology GA RE892 UT WOS:A1995RE89200025 ER PT J AU BANUELOS, GS MACKEY, B WU, L ZAMBRZUSKI, S AKOHOUE, S AF BANUELOS, GS MACKEY, B WU, L ZAMBRZUSKI, S AKOHOUE, S TI BIOEXTRACTION OF SOIL BORON BY TALL FESCUE SO ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY LA English DT Article ID SELENIUM ACCUMULATION; PLANT-TISSUE; MODEL; SALINITY; TOXICITY; SALT; MECHANISMS; DIGESTION; REMOVAL; BARLEY AB High concentrations of soil B are detrimental to crop productivity in certain arid and semiarid regions of the western United States. Production of tall fescue on B-affected soils may be a viable strategy to reduce and maintain soil B concentrations at nontoxic levels for most agronomic crops. A 2-year field experiment was conducted to study B uptake in tall fescue (Festuca arundinacea) Schreb, cv. Au Triumph grown in soil containing potentially toxic levels of native soil B. The soil B concentrations (water-extractable B greater than 5 mg B liter(-1)) did not affect the dry matter (DM) yield of tall fescue. Boron concentrations in shoot tissue for both years ranged from 88 to 121 mg B kg(-1) DM, whereas in root tissue, concentrations ranged from 50 to 60 mg B kg(-1) DM. For both years of the study, soil samples were taken at depth of 0-45 and 45-90 cm at the beginning and end of the designated growing season and analyzed for water-extractable B. Summary data from all cropped plots at the two soil depths indicated that the mean water-extractable B concentrations were reduced by 35% after 2 years in the tall fescue plots, whereas losses of extractable B from bare plots did not exceed 13% for both years. Tall fescue apparently can be used as a component in an overall strategy to lower extractable soil native B levels in irrigated agriculture soils and potentially reduce leaching of B into shallow ground water. C1 USDA ARS, PWA, ALBANY, CA 94710 USA. LAWRENCE LIVERMORE NATL LAB, DEPT ENVIRONM HORT, DAVIS, CA 95616 USA. RP BANUELOS, GS (reprint author), USDA ARS, WATER MGMT RES LAB, 2021 S PEACH AVE, FRESNO, CA 93727 USA. NR 34 TC 8 Z9 8 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0147-6513 J9 ECOTOX ENVIRON SAFE JI Ecotox. Environ. Safe. PD JUL PY 1995 VL 31 IS 2 BP 110 EP 116 DI 10.1006/eesa.1995.1050 PG 7 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA RG470 UT WOS:A1995RG47000003 PM 8521775 ER PT J AU GIOMETTI, CS TOLLAKSEN, SL CHUBB, C WILLIAMS, C HUBERMAN, E AF GIOMETTI, CS TOLLAKSEN, SL CHUBB, C WILLIAMS, C HUBERMAN, E TI ANALYSIS OF PROTEINS FROM HUMAN BREAST EPITHELIAL-CELLS USING 2-DIMENSIONAL GEL-ELECTROPHORESIS SO ELECTROPHORESIS LA English DT Article; Proceedings Paper CT 2D Electrophoresis - From Protein Maps to Genomes CY SEP 05-07, 1994 CL SIENA, ITALY DE 2-DIMENSIONAL POLYACRYLAMIDE GEL ELECTROPHORESIS; PROTEINS; BREAST; HUMAN BREAST EPITHELIAL CELLS ID 2-DIMENSIONAL ELECTROPHORESIS; TISSUE PROTEINS; MAMMARY-GLAND; CARCINOMA; DATABASE; CYTOKERATINS; QUANTITATION; EXPRESSION; FRACTIONS; PATTERNS AB The human breast is a highly specialized, complex tissue comprised of a heterogeneous population of cells with varying functions. Interactions between the different cell types, changes in their relative abundance, state of differentiation and function in response to stimuli, as well as the alterations that lead to the aberrant growth associated with malignancy are poorly understood. Two-dimensional gel electrophoresis is being used to compare the proteins found in different breast cells in order to identify the gene products that are common or specific to particular cell types so as to provide markers that will be useful in studies of normal breast cell differentiation and the dedifferentiation or blocked differentiation characteristic of cancer. Protein patterns have been obtained from cells prepared for electrophoresis immediately after isolation from human milk, from cells cultured for fewer than ten passages after isolation from healthy breast tissue removed during reduction mammoplasty, and from cells maintained in long-term tissue culture after isolation from the pleural effusions of patients with breast carcinomas. Differential expression of cytokeratins 8, 18, and 19, shown previously to be predominantly expressed by epithelial cells in the luminal layer of breast tissue, was observed among the cells analyzed. Other non-cytokeratin proteins were also found to be differentially expressed in subsets of both the normal and tumor cells. A composite human breast cell protein pattern was created which includes all the commonly and specifically expressed proteins found in this study. This pattern will be the basis for continuing studies of proteins in the human breast. RP GIOMETTI, CS (reprint author), ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,9700 S CASS AVE,BLDG 202,ROOM B 117,ARGONNE,IL 60439, USA. NR 31 TC 22 Z9 24 U1 0 U2 1 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0173-0835 J9 ELECTROPHORESIS JI Electrophoresis PD JUL PY 1995 VL 16 IS 7 BP 1215 EP 1224 DI 10.1002/elps.11501601202 PG 10 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA RN716 UT WOS:A1995RN71600021 PM 7498169 ER PT J AU KOOMEY, JG DUNHAM, C LUTZ, JD AF KOOMEY, JG DUNHAM, C LUTZ, JD TI THE EFFECT OF EFFICIENCY STANDARDS ON WATER-USE AND WATER-HEATING ENERGY USE IN THE US - A DETAILED END-USE TREATMENT SO ENERGY LA English DT Article AB We analyze U.S. residential water use and water-heater energy use and apply this analysis to investigate water and energy savings associated with U.S. equipment efficiency standards currently in force. RP KOOMEY, JG (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,ENERGY ANAL PROGRAM,BERKELEY,CA 94720, USA. NR 18 TC 4 Z9 4 U1 0 U2 4 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 JUL PY 1995 VL 20 IS 7 BP 627 EP 635 DI 10.1016/0360-5442(95)00005-2 PG 9 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA RE490 UT WOS:A1995RE49000005 ER PT J AU LIU, F ROSS, M WANG, SM AF LIU, F ROSS, M WANG, SM TI ENERGY EFFICIENCY OF CHINA CEMENT INDUSTRY SO ENERGY LA English DT Article AB We have studied the cement industry in China to determine the prospects for renovation and for building new facilities during the 1990s, and, in particular, the prospects for improved energy efficiency. The potential is good for renovating most vertical-kiln plants to improve their energy intensity 10-30% while substantially increasing their capacity and reducing pollution, all at low cost. State-of-the-art precalciner kilns offer small energy-efficiency advantages, but important environmental and product-quality advantages over improved vertical kilns. We present three scenarios that differ as to the technology of new plants, emphasizing: (i) high-cost, state-of-the-art precalciner kilns, (ii) moderate-cost advanced vertical kilns, and (iii) low-cost vertical kilns without advanced technology. We discuss the costs, energy intensities, and environmental implications of these three scenarios. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,ENERGY ANAL PROGRAM,BERKELEY,CA 94720. CHINA STATE PLANNING COMMISS,ENERGY RES INST,BEIJING,PEOPLES R CHINA. NR 24 TC 38 Z9 44 U1 0 U2 4 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 JUL PY 1995 VL 20 IS 7 BP 669 EP 681 DI 10.1016/0360-5442(95)00002-X PG 13 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA RE490 UT WOS:A1995RE49000009 ER PT J AU AGBLEVOR, FA BESLER, S WISELOGEL, AE AF AGBLEVOR, FA BESLER, S WISELOGEL, AE TI FAST PYROLYSIS OF STORED BIOMASS FEEDSTOCKS SO ENERGY & FUELS LA English DT Article AB Biomass pyrolysis oils were produced from stored biomass feedstocks by rapid pyrolysis in a fluidized bed reactor. The feedstocks used for these studies were switchgrass, corn stover, and hybrid poplar. The woody and herbaceous feedstocks were stored in chip piles and bales, respectively, unprotected in an open field for 6 months. At the end of the storage period, biomass samples were taken from the interior of bales and the centers of chip piles for pyrolysis studies. The materials were ground to pass -20/+80 mesh and dried to less than 10% moisture content before pyrolyzing in the fluidized bed reactor. Pyrolysis was conducted at 500 degrees C and with less than 0.4 s apparent vapor residence time. Total liquid yields were as high as 66% for the hybrid poplar and as low as 58% for the corn stover. Moisture content of the oils was between 10 and 13%. Gas and char/ash yields were 10-15% and 12-22%, respectively. The char/ash yields were feedstock dependent, but storage influence was significant for only the corn stover feedstock. Gas and liquid yields were not influenced by storage time. The oils were highly oxygenated and had higher heating values (HHV) of 23-24 MJ/kg that decreased slightly with storage time for all the feedstocks except the switchgrass. The oils, as currently produced, are high in ash and alkali metals. Ultimately, they may be upgraded and used as boiler and turbine fuels. RP AGBLEVOR, FA (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 19 TC 55 Z9 57 U1 0 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD JUL-AUG PY 1995 VL 9 IS 4 BP 635 EP 640 DI 10.1021/ef00052a010 PG 6 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA RL023 UT WOS:A1995RL02300010 ER PT J AU ISMAIL, K MITCHELL, SC BROWN, SD SNAPE, CE BUCHANAN, AC BRITT, PF FRANCO, DV MAES, II YPERMAN, J AF ISMAIL, K MITCHELL, SC BROWN, SD SNAPE, CE BUCHANAN, AC BRITT, PF FRANCO, DV MAES, II YPERMAN, J TI SILICA-IMMOBILIZED SULFUR-COMPOUNDS AS SOLID CALIBRANTS FOR TEMPERATURE-PROGRAMMED REDUCTION AND PROBES FOR THE THERMAL-BEHAVIOR OF ORGANIC SULFUR FORMS IN FOSSIL-FUELS SO ENERGY & FUELS LA English DT Article ID COAL; THERMOLYSIS; SURFACE AB For the well-swept fixed-bed reactors used in temperature-programmed reduction (TPR) to specify the organic sulfur forms present in coals and kerogens, calibrants must neither melt nor evaporate before the onset of thermal decomposition. In this respect, nonmelting silica-immobilized substrates are suitable with the Si-O-C linkage being stable up to ca. 500 degrees C. Silica-immobilized samples of dibenzothiophene, diphenyl sulfide, phenyl benzyl sulfide, and thioanisole have been synthesized and noncatalytic tests have been conducted in atmospheric and high-pressure TPR reactors. The characteristic reduction temperatures of the non-thiophenic compounds investigated are well resolved from that of dibenzothiophene for both techniques and the results have validated previous findings by TPR on coals. The use of high hydrogen pressure (150 bar) lowered the reduction temperatures substantially. The H2S recoveries from the atmospheric experiments are low suggesting that, for the non-thiophenic compounds, secondary reactions occur yielding refractory thiophenes which are not detected. Although sulfur recoveries are greatly improved, such reactions are still evident with 150 bar hydrogen pressure especially in the case of the phenyl benzyl sulfide, possibly as a consequence of the high surface coverages used. Insights into the retrogressive chemistry occurring for the immobilized phenyl benzyl sulfide have been provided from GC-MS analysis of hydrolyzed TPR residues obtained at different temperatures, and from vacuum pyrolysis experiments conducted as a function of surface coverage. C1 UNIV STRATHCLYDE,DEPT PURE & APPL CHEM,GLASGOW G1 1XL,LANARK,SCOTLAND. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. LIMBURGS UNIV CENTRUM,INORGAN & PHYS CHEM LAB,B-3590 DIEPENBEEK,BELGIUM. OI Snape, Colin/0000-0002-6671-8766 NR 26 TC 45 Z9 49 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD JUL-AUG PY 1995 VL 9 IS 4 BP 707 EP 716 DI 10.1021/ef00052a020 PG 10 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA RL023 UT WOS:A1995RL02300020 ER PT J AU HILL, LJ HADLEY, SW AF HILL, LJ HADLEY, SW TI FEDERAL-TAX EFFECTS ON THE FINANCIAL ATTRACTIVENESS OF RENEWABLE VERSUS CONVENTIONAL POWER-PLANTS SO ENERGY POLICY LA English DT Article DE RENEWABLE ENERGY; RENEWABLE POWER PLANTS; FEDERAL TAXES AND RENEWABLE ENERGY AB In this paper, we examine the effects of federal tax laws on the financial attractiveness of seven renewable and four conventional electric power generating technologies adopted by investor owned utilities (IOUs) and non-utility electricity generators (NUGs), The results show that federal income tax laws applicable to renewable generating technologies generally provide very attractive financial incentives for the adoption of these technologies by IOUs and NUGs. If an IOU or NUG is subject to the alternative minimum tax, however, it may not be able to take full advantage of these financial incentives. RP HILL, LJ (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,OAK RIDGE,TN 37831, USA. RI Hadley, Stanton/O-1465-2015 OI Hadley, Stanton/0000-0002-6514-8802 NR 2 TC 2 Z9 3 U1 0 U2 3 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 JUL PY 1995 VL 23 IS 7 BP 593 EP 597 DI 10.1016/0301-4215(95)98214-D PG 5 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA RY651 UT WOS:A1995RY65100004 ER PT J AU BINER, SB AF BINER, SB TI A FEM ANALYSIS OF CRACK-GROWTH IN MICROCRACKING BRITTLE SOLIDS SO ENGINEERING FRACTURE MECHANICS LA English DT Article ID FINITE-ELEMENT METHOD; TIP; RESISTANCE; CERAMICS AB In this study large scale microcracking ahead of the growing main crack in brittle solids was studied numerically. The random nucleation, orientation and size effects of discrete microcracks and resulting interactions are fully accounted for in a hybrid element model. The results obtained were compared with the available continuum solutions. The continuum description of microcracking can provide a reasonable estimation of shielding resulting from pre-nucleated and continuous nucleation of microcracks ahead of the growing main crack. However, it fails to distinguish the effects of microcrack zone length and the role of the wake region during the crack extension. The knowledge of the magnitude of shielding is not sufficient to predict the development of the R-curve behavior. It is essential to know the inherent fracture toughness of the material undergoing microcracking, since not every shielding event during the course of crack extension corresponds to an increase in the R-curve. It will also be shown that crack branching and crack kinking can readily develop as a result of microcracking. RP BINER, SB (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 25 TC 10 Z9 10 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-7944 J9 ENG FRACT MECH JI Eng. Fract. Mech. PD JUL PY 1995 VL 51 IS 4 BP 555 EP 573 DI 10.1016/0013-7944(94)00309-6 PG 19 WC Mechanics SC Mechanics GA RE890 UT WOS:A1995RE89000004 ER PT J AU Jen, MS Hoylman, AM Edwards, NT Walton, BT AF Jen, MS Hoylman, AM Edwards, NT Walton, BT TI Experimental method to measure gaseous uptake of C-14-toluene by foliage SO ENVIRONMENTAL AND EXPERIMENTAL BOTANY LA English DT Article ID ORGANIC-CHEMICALS; PLANT; ROOT; SOIL AB An experimental method is described to measure foliar uptake and translocation of volatile organic compounds in plants. A flow-through exposure chamber was designed to determine phytoxicity of volatile organic compounds; an air-tight chamber was used for exposure of whole plants to radio-labeled test compound. C-14-toluene uptake by soybean (Glycine max) foliage was measured as an example of the experimental approach. Leaf tissue concentrations of C-14-toluene were measured over a 55.5-hr exposure period during light and dark periods. Photosynthetic rate was not affected by chronic atmospheric exposure to 27 mu mole cm(-3) hr toluene. During a 55.5-hr exposure to 7.2 mu moles cm(-3) hr C-14-toluene (1.94 Bq cm(-3)), deposition velocities were greatest in the light phases and showed a marked decrease during the dark phases of exposure, suggesting that stomatal uptake as well as surface deposition contributed to toluene uptake. C-14 was translocated from foliage to the roots. These data indicate that deposition of volatile organic compounds to vegetation may constitute a mechanism leading to herbivore exposure to volatile hazardous organics at waste sites. The experimental method described can be used to measure foliar uptake and translocation of volatile organic compounds to whole plants under laboratory conditions. C1 CALIF STATE UNIV LOS ANGELES,DEPT BIOL SCI,LOS ANGELES,CA 90032. UNIV TENNESSEE,GRAD PROGRAM ECOL,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 19 TC 14 Z9 14 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0098-8472 J9 ENVIRON EXP BOT JI Environ. Exp. Bot. PD JUL PY 1995 VL 35 IS 3 BP 389 EP 398 DI 10.1016/0098-8472(95)00007-4 PG 10 WC Plant Sciences; Environmental Sciences SC Plant Sciences; Environmental Sciences & Ecology GA TL544 UT WOS:A1995TL54400014 ER PT J AU SEAMAN, JC BERTSCH, PM MILLER, WP AF SEAMAN, JC BERTSCH, PM MILLER, WP TI CHEMICAL CONTROLS ON COLLOID GENERATION AND TRANSPORT IN A SANDY AQUIFER SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID LOW ELECTROLYTE CONCENTRATION; SOIL HYDRAULIC CONDUCTIVITY; SURFACE-CHARGE; CLAY DISPERSION; ALUMINUM; PARTICLES; IRON; MONTMORILLONITE; ADSORPTION; MIGRATION AB Colloid generation and transport in a highly weathered subsurface material from the Upper Coastal Plain (Aiken, SC) was controlled by factors other than the Na+ concentration of the leaching solution. Repacked columns were leached with solutions of various Nai to Ca2+ and Mg2+ ratios. Following injection of the treatment solution, the columns were leached with deionized water (DIW). For the mixed cation solutions prepared from Cl- salts, colloid generation occurred only when the treatment solution was replaced with DIW, but the level of effluent turbidity decreased with increasing Naf concentration and increasing duration of exposure to the high Na+ solution. CaCl2 solutions produced substantial mobile colloids during injection that coincided with a decrease in effluent pH. The mobile colloids possessed a positive electrophoretic mobility, suggesting that the drop in pH during salt injection, thought to be the result of specific cation adsorption and Al exchange and hydrolysis, may enhance dispersion by increasing the positive surface charge on both the mobile colloids and the immobile matrix. These results suggest that even minor changes in groundwater composition can influence surface charge and colloid generation in an iron oxide-dominated system. C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DIV BIOGEOCHEM,AIKEN,SC 29802. UNIV GEORGIA,ATHENS,GA 30602. NR 44 TC 61 Z9 63 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD JUL PY 1995 VL 29 IS 7 BP 1808 EP 1815 DI 10.1021/es00007a018 PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA RG467 UT WOS:A1995RG46700029 PM 22176454 ER PT J AU DUPREE, EA WATKINS, JP INGLE, JN WALLACE, PW WEST, CM TANKERSLEY, WG AF DUPREE, EA WATKINS, JP INGLE, JN WALLACE, PW WEST, CM TANKERSLEY, WG TI URANIUM DUST EXPOSURE AND LUNG-CANCER RISK IN 4 URANIUM PROCESSING OPERATIONS SO EPIDEMIOLOGY LA English DT Article DE IONIZING RADIATION; LUNG NEOPLASMS; RADIUM; RADON; SMOKING; THORIUM; URANIUM; OCCUPATION AB We examined the relation between uranium dust exposure and lung cancer mortality among workers employed in four uranium processing or fabrication operations located in Missouri, Ohio, and Tennessee. Among workers who had at least 30 years of potential follow-up, we identified 787 lung cancer cases from death certificates and matched one control to each case. Health physicists estimated individual annual lung doses from occupational exposure primarily to insoluble uranium compounds, using contemporary monitoring data. With a 10-year lag, cumulative lung doses ranged from 0 to 137 centigrays (cGy) for cases and from 0 to 80 cGy for controls. Health physicists assigned annual external radiation doses to workers having personal monitoring records. Archivists collected smoking information from occupational medical records. Odds ratios for lung cancer mortality for seven cumulative internal dose groups did not demonstrate increasing risk with increasing dose. We found an odds ratio of 2.0 for those exposed to 25 cGy and higher, but the 95% confidence interval of 0.20 to 20 showed great uncertainty in this estimate. There was a suggestion of an exposure effect for workers hired at age 45 years or older. Further analyses for cumulative external doses and exposures to thorium, radium, and radon did not reveal any clear association between exposure and increased risk, nor did dichotomizing workers by facility. RP DUPREE, EA (reprint author), OAK RIDGE INST SCI & EDUC,CTR EPIDEMIOL RES,DIV MED SCI,POB 117,OAK RIDGE,TN 37831, USA. NR 0 TC 23 Z9 24 U1 0 U2 7 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 1044-3983 J9 EPIDEMIOLOGY JI Epidemiology PD JUL PY 1995 VL 6 IS 4 BP 370 EP 375 DI 10.1097/00001648-199507000-00007 PG 6 WC Public, Environmental & Occupational Health SC Public, Environmental & Occupational Health GA RF747 UT WOS:A1995RF74700007 PM 7548343 ER PT J AU BERRY, L BROWN, MA AF BERRY, L BROWN, MA TI USING PROBABILITY-DISTRIBUTIONS TO EVALUATE AN ENERGY-CONSERVATION PROGRAM - A TECHNIQUE FOR DEALING WITH CONTROVERSY SO EVALUATION AND PROGRAM PLANNING LA English DT Article C1 OAK RIDGE NATL LAB,ENERGY EFFICIENCY & RENEWABLE ENERGY PROGRAM,OAK RIDGE,TN 37831. RP BERRY, L (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,POB 2008,OAK RIDGE,TN 37831, USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0149-7189 J9 EVAL PROGRAM PLANN JI Eval. Program Plan. PD JUL-SEP PY 1995 VL 18 IS 3 BP 209 EP 217 DI 10.1016/S0149-7189(95)00015-1 PG 9 WC Social Sciences, Interdisciplinary SC Social Sciences - Other Topics GA TJ355 UT WOS:A1995TJ35500001 ER PT J AU KNIZE, MG SINHA, R ROTHMAN, N BROWN, ED SALMON, CP LEVANDER, OA CUNNINGHAM, PL FELTON, JS AF KNIZE, MG SINHA, R ROTHMAN, N BROWN, ED SALMON, CP LEVANDER, OA CUNNINGHAM, PL FELTON, JS TI HETEROCYCLIC AMINE CONTENT IN FAST-FOOD MEAT-PRODUCTS SO FOOD AND CHEMICAL TOXICOLOGY LA English DT Article ID AROMATIC-AMINES; MASS-SPECTROMETRY; COOKING METHODS; FINNISH FOODS; COOKED-FOOD; MUTAGENICITY; CARCINOGENS; BEEF; 2-AMINO-3,4,8-TRIMETHYLIMIDAZO<4,5-F>QUINOXALINE; 2-AMINO-1-METHYL-6-PHENYLIMIDAZO<4,5-B>PYRIDINE AB Heterocyclic aromatic amines are sometimes formed during the cooking of muscle meats, and their mutagenic and carcinogenic effects are of potential concern in the aetiology of human cancer. In a large survey of the heterocyclic amine content of foods, fried or charbroiled hamburgers, fried chicken, chicken breast sandwiches, fish sandwiches and breakfast sausages were purchased from fast-food restaurants. At least three different chains were visited per product and samples from five stores from each chain were pooled. The solid-phase extraction and HPLC method was used to analyse pooled samples for heterocyclic amine content and mutagenic activity with the Ames/Salmonella assay. Samples were analysed in a blind study which also contained quality control samples of two types, one high and one low in heterocyclic amine content and mutagenic activity. Results from the fast-food products showed undetectable levels of heterocyclic amines in 10 of 17 samples and only low levels [less than or equal to 1 ng/g total of 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx), 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) and 2-amino-3,4,8-trimethylimidazo[4,5-f]quinoxaline (DiMeIQx)] in the remaining samples. Compared with literature values based primarily on laboratory and home cooking conditions, fast-food meat products appear to contribute only a small percentage of the estimated daily dietary intake of heterocyclic amines. C1 NCI,ENVIRONM EPIDEMIOL BRANCH,ROCKVILLE,MD 20892. USDA ARS,BHNRC,NUTRIENT REQUIREMENTS & FUNCT LAB,BELTSVILLE,MD 20705. RP KNIZE, MG (reprint author), LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,POB 808,LIVERMORE,CA 94551, USA. RI Sinha, Rashmi/G-7446-2015 OI Sinha, Rashmi/0000-0002-2466-7462 FU NCI NIH HHS [CA55861, YO1CP2-0523-01] NR 27 TC 125 Z9 126 U1 1 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0278-6915 J9 FOOD CHEM TOXICOL JI Food Chem. Toxicol. PD JUL PY 1995 VL 33 IS 7 BP 545 EP 551 DI 10.1016/0278-6915(95)00025-W PG 7 WC Food Science & Technology; Toxicology SC Food Science & Technology; Toxicology GA RL884 UT WOS:A1995RL88400001 PM 7628789 ER PT J AU MACGREGOR, JT FARR, S TUCKER, JD HEDDLE, JA TICE, RR TURTELTAUB, KW AF MACGREGOR, JT FARR, S TUCKER, JD HEDDLE, JA TICE, RR TURTELTAUB, KW TI NEW MOLECULAR END-POINTS AND METHODS FOR ROUTINE TOXICITY TESTING SO FUNDAMENTAL AND APPLIED TOXICOLOGY LA English DT Editorial Material ID ACCELERATOR MASS-SPECTROMETRY; BIO-MEDICAL SCIENCES; SPRAGUE-DAWLEY RATS; DNA DAMAGE; CELL-DEATH; TRANSGENIC MICE; CHAIN-REACTION; STRAND BREAKS; LYMPHOCYTES; SINGLE C1 XENOMETRIX INC,BOULDER,CO. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. UNIV YORK,TORONTO,ON,CANADA. INTEGRATED SYST LAB,RES TRIANGLE PK,NC. RP MACGREGOR, JT (reprint author), SRI INT,333 RAVENSWOOD AVE,MENLO PK,CA 94025, USA. FU NCI NIH HHS [CA55861]; NIEHS NIH HHS [ES04705] NR 74 TC 38 Z9 39 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0272-0590 J9 FUND APPL TOXICOL JI Fundam. Appl. Toxicol. PD JUL PY 1995 VL 26 IS 2 BP 156 EP 173 DI 10.1006/faat.1995.1087 PG 18 WC Toxicology SC Toxicology GA RH911 UT WOS:A1995RH91100002 PM 7589905 ER PT J AU MENON, MM BAXI, CB CAMPBELL, GL HOGAN, JT LAUGHON, GL MAHDAVI, MA MAINGI, R MIODUSZEWSKI, PK OWEN, LW REIS, EE SCHAFFER, MJ SCHAUBEL, KM SMITH, JP STAMBAUGH, RD WADE, MR AF MENON, MM BAXI, CB CAMPBELL, GL HOGAN, JT LAUGHON, GL MAHDAVI, MA MAINGI, R MIODUSZEWSKI, PK OWEN, LW REIS, EE SCHAFFER, MJ SCHAUBEL, KM SMITH, JP STAMBAUGH, RD WADE, MR TI PARTICLE EXHAUST CHARACTERISTICS OF AN IN-VESSEL CRYOPUMP USED IN DIII-D DIVERTED PLASMAS SO FUSION TECHNOLOGY LA English DT Article DE PARTICLE EXHAUST; CRYOPUMP; DENSITY CONTROL AB A particle exhaust scheme, employing a cryocondensation pump in the outboard divertor region under a baffle, has been installed and operated in the DIII-D tokamak. The cryopump provides toroidally symmetric pumping at a rate of 30 000 to 40 000 l/s for D-2 in the pressure range of 1 to 4 mTorr. Pressures in the 2 to 3 mTorr range are routinely observed under the baffle. This translates to particle exhaust throughputs of similar to 100 Torr l/s. The exhaust throughput could be controlled by selecting the position of the plasma strike region with respect to the opening to the baffle chamber. The pump has been used quite effectively for plasma density control. C1 GEN ATOM CO,SAN DIEGO,CA 92186. RP MENON, MM (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 20 TC 6 Z9 6 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 JUL PY 1995 VL 27 IS 4 BP 355 EP 363 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA RN644 UT WOS:A1995RN64400003 ER PT J AU GREENSPAN, E ANNESE, CE MILLER, WF WATKINS, EF TOBIN, ML LATKOWSKI, JF LEE, JD SORAN, P AF GREENSPAN, E ANNESE, CE MILLER, WF WATKINS, EF TOBIN, ML LATKOWSKI, JF LEE, JD SORAN, P TI EFFICIENT TIME-INDEPENDENT METHOD FOR CONCEPTUAL DESIGN OPTIMIZATION OF THE NATIONAL IGNITION FACILITY PRIMARY SHIELD SO FUSION TECHNOLOGY LA English DT Article DE DELAYED PHOTON EFFECTS; MINIMUM COST SHIELD; MATERIAL EFFECTIVENESS FUNCTIONS ID DOSE-RATE AB Minimum-cost design concepts of the primary shield for the National (laser fusion) Ignition Facility are sought with the help of the SWAN optimization code. The computational method developed for this search involves incorporating the time dependence of the delayed photon field within effective delayed photon production cross sections. This method enables the time-dependent problem to be addressed using time-independent transport calculations, thus significantly simplifying and accelerating the design process The search for constituents that will minimize the shield cost is guided by the newly defined equal cost replacement effectiveness functions. The minimum-cost shield design concept consists of a mixture of polyethylene and low-cost, low-activation materials, such as CaCO3 or silicon carbide, with boron added near the shield boundaries. An alternative approach to the target chamber design is analyzed. It involves placing the shield interior, rather than exterior to the main aluminum structural wall of the target chamber. The resulting inner shield design approach was found to be more expensive but inherently safer; the overall inventory of radioactive activation products it contains is one to two orders of magnitude lower than in the conventional design approach. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP GREENSPAN, E (reprint author), UNIV CALIF BERKELEY,DEPT NUCL ENGN,BERKELEY,CA 94720, USA. NR 22 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 JUL PY 1995 VL 27 IS 4 BP 417 EP 451 PG 35 WC Nuclear Science & Technology SC Nuclear Science & Technology GA RN644 UT WOS:A1995RN64400009 ER PT J AU SCHRICK, JJ DICKINSON, ME HOGAN, BLM SELBY, PB WOYCHIK, RP AF SCHRICK, JJ DICKINSON, ME HOGAN, BLM SELBY, PB WOYCHIK, RP TI MOLECULAR AND PHENOTYPIC CHARACTERIZATION OF A NEW MOUSE INSERTIONAL MUTATION THAT CAUSES A DEFECT IN THE DISTAL VERTEBRAE OF THE SPINE SO GENETICS LA English DT Article ID GREIG CEPHALOPOLYSYNDACTYLY SYNDROME; EXTRA-TOES XT; PAIRED BOX; GENE; MICE; PAX-1; GLI3; EXPRESSION; DELETION; LINKAGE AB We have identified and characterized the phenotype of a new insertional mutation in one line of transgenic mice. Mice carrying this mutation, which we have designated TgN(Imusd)370Rpw, display undulations of the vertebrae giving rise to a novel kinky-tail phenotype. Molecular characterization of the insertion site indicates that the transgene integration has occurred without any substantial alterations in the structure of the host sequences. Using probes that flank the insertion site, we have mapped the mutation to chromosome 5 near the semidominant mutation, thick tail (Tht). Thick tail does not complement the TgN(Imusd)370Rpw mutation; compound mutants containing one copy of each mutation display a more severe phenotype than either mutation individually. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. VANDERBILT UNIV,SCH MED,DEPT CELL BIOL,NASHVILLE,TN 37232. VANDERBILT UNIV,SCH MED,HOWARD HUGHES MED INST,NASHVILLE,TN 37232. FU NICHD NIH HHS [R01 HD-25323] NR 37 TC 7 Z9 7 U1 0 U2 1 PU GENETICS PI BALTIMORE PA 428 EAST PRESTON ST, BALTIMORE, MD 21202 SN 0016-6731 J9 GENETICS JI Genetics PD JUL PY 1995 VL 140 IS 3 BP 1061 EP 1067 PG 7 WC Genetics & Heredity SC Genetics & Heredity GA RE868 UT WOS:A1995RE86800018 PM 7672577 ER PT J AU DORN, RI BRADY, PV AF DORN, RI BRADY, PV TI ROCK-BASED MEASUREMENT OF TEMPERATURE-DEPENDENT PLAGIOCLASE WEATHERING SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Letter ID ATMOSPHERIC CO2; RATES; ENHANCEMENT; CARBONATE; CHEMISTRY; PLANTS; CYCLE; FLOWS AB Long-term(>10(5) years) weathering can be quantified by measuring microsopic dissolution of minerals in exposed rock surfaces. Digital backscattered (BSE) electron microscope images of plagioclase porosity in field exposures of known age resolves weathering at finer scales and over longer time spans than conventional solute budget and laboratory studies. Rock-based BSE imaging is therefore a potentially useful tool for quantifying steady-state weathering fluxes occurring over geologic time. Here, we compare results of the rock-based method against solute-budget and experimental data, using plagioclase weathering rates from C-14-dated basalt flows on Hualalai Volcano in Hawaii, USA. A rock-based field activation energy of 26.2 kcal mol(-1) is somewhat higher than solute-budget and laboratory measurements of plagioclase weathering. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP DORN, RI (reprint author), ARIZONA STATE UNIV,DEPT GEOG,TEMPE,AZ 85287, USA. NR 55 TC 24 Z9 24 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0016-7037 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD JUL PY 1995 VL 59 IS 13 BP 2847 EP 2852 DI 10.1016/0016-7037(95)00159-W PG 6 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA RL234 UT WOS:A1995RL23400018 ER PT J AU WELLS, SG MCFADDEN, LD POTHS, J OLINGER, CT AF WELLS, SG MCFADDEN, LD POTHS, J OLINGER, CT TI COSMOGENIC HE-3 SURFACE-EXPOSURE DATING OF STONE PAVEMENTS - IMPLICATIONS FOR LANDSCAPE EVOLUTION IN DESERTS SO GEOLOGY LA English DT Article ID EASTERN MOJAVE DESERT; CIMA VOLCANIC FIELD; QUATERNARY CLIMATIC CHANGES; PEDOGENIC PROCESSES; SOIL DEVELOPMENT; CALIFORNIA; PIEDMONT; RATES; ROCK AB The formation of stone pavements, a ubiquitous gravel armor mantling landforms in arid regions of the world, has been previously attributed to erosion by wind and water or alternating shrinking and swelling of soil horizons, implying that gravel is concentrated at the land surface in a time-transgressive manner. A newly proposed model for pavement evolution differs from these models in that pavement clasts are continuously maintained at the land surface in response to deposition and pedogenic modification of windblown dust. In-situ cosmogenic He-3 surface-exposure ages on volcanic and alluvial landforms in the Mojave Desert of California are used to understand pavement evolution over geologic time scales and to test this new model. These exposure ages are stratigraphically consistent, show internal consistency at each site, and, for stone pavements adjacent to pristine, continuously exposed volcanic bedrock, are indistinguishable at the 1 sigma level. We conclude that stone pavements are born at the surface and that pavements may provide one of the longest-term records of geologic, hydrologic, and climatic processes operating on desert surfaces. C1 UNIV NEW HAMPSHIRE,DEPT EARTH & PLANETARY SCI,ALBUQUERQUE,NM 87131. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP WELLS, SG (reprint author), UNIV CALIF RIVERSIDE,DEPT EARTH SCI,RIVERSIDE,CA 92521, USA. NR 23 TC 92 Z9 94 U1 3 U2 8 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0091-7613 J9 GEOLOGY JI Geology PD JUL PY 1995 VL 23 IS 7 BP 613 EP 616 DI 10.1130/0091-7613(1995)023<0613:CHSEDO>2.3.CO;2 PG 4 WC Geology SC Geology GA RG180 UT WOS:A1995RG18000009 ER PT J AU GOSLING, JT MCCOMAS, DJ PHILLIPS, JL PIZZO, VJ GOLDSTEIN, BE FORSYTH, J LEPPING, RP AF GOSLING, JT MCCOMAS, DJ PHILLIPS, JL PIZZO, VJ GOLDSTEIN, BE FORSYTH, J LEPPING, RP TI A CME-DRIVEN SOLAR-WIND DISTURBANCE OBSERVED AT BOTH LOW AND HIGH HELIOGRAPHIC LATITUDES SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID ULYSSES AB A solar wind disturbance produced by a fast coronal mass ejection, CME, that departed from the Sun on Feburary 20, 1994 was observed in the ecliptic plane at 1 AU by IMP 8 and at high heliographic latitudes at 3.53 AU by Ulysses. In the ecliptic the disturbance included a strong forward shock but no reverse shock, while at high latitudes the disturbance was bounded by a relatively weak forward-reverse shock pair. It is clear that the disturbance in the ecliptic plane was driven primarily by the relative speed between the CME and a slower ambient solar wind ahead, whereas at higher latitudes the disturbance was driven by expansion of the CME. The combined IMP 8 and Ulysses observations thus provide a graphic illustration of how a single fast CME can produce very different types of solar wind disturbances at low and high heliographic latitudes. Simple numerical simulations help explain observed differences at the two spacecraft. C1 NOAA, SPACE ENVIRONM LAB, BOULDER, CO 80303 USA. CALTECH, JET PROP LAB, PASADENA, CA 91109 USA. UNIV LONDON IMPERIAL COLL SCI & TECHNOL, BLACKETT LAB, LONDON SW7 2BZ, ENGLAND. NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA. RP LOS ALAMOS NATL LAB, MS D466, LOS ALAMOS, NM 87545 USA. NR 12 TC 55 Z9 56 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 1 PY 1995 VL 22 IS 13 BP 1753 EP 1756 DI 10.1029/95GL01776 PG 4 WC Geosciences, Multidisciplinary SC Geology GA RK059 UT WOS:A1995RK05900030 ER PT J AU BOSLOUGH, MB CRAWFORD, DA TRUCANO, TG ROBINSON, AC AF BOSLOUGH, MB CRAWFORD, DA TRUCANO, TG ROBINSON, AC TI NUMERICAL MODELING OF SHOEMAKER-LEVY-9 IMPACTS AS A FRAMEWORK FOR INTERPRETING OBSERVATIONS SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article AB Computational models of the impacts of Comet Shoemaker-levy 9 onto Jupiter may provide the best framework by which the observational data can be interpreted. Among the observations that have already been at least partially explained in a way that appears to be consistent with the impact models are: the sources and timings of multiple flashes observed from Earth, the temperatures and durations of the single flashes observed from the Galileo spacecraft, and the asymmetry of the plumes and ejecta patterns Observed by the Hubble Space Telescope. Further modeling subsequent to the impacts has shown that (contrary to our preimpact expectations) fireball trajectory data do not provide strong constraints on either fragment mass or maximum penetration depth. Instead, it is the cross-sectional area of the fragment (or swarm of sub-fragments) at the time of impact that determines the ejection velocity and trajectory of the fireball. The observation of seemingly consistent plume heights, coupled with this computational result, suggests that SL-9 fragments were loosely-bound ''rubble piles,'' possibly with widely varying masses, that in most cases dispersed to about the same diameter (2.0 +/- 0.5 km) by the time they reached the Jovian atmosphere. After more data become available and correlated, and more simulations are performed, we expect that fragment size estimates will become more precise. C1 SANDIA NATL LABS,DEPT COMPUTAT PHYS RES & DEV,ALBUQUERQUE,NM 87185. RP BOSLOUGH, MB (reprint author), SANDIA NATL LABS,DEPT EXPTL IMPACT PHYS,MS 0821,ALBUQUERQUE,NM 87185, USA. NR 16 TC 29 Z9 29 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD JUL 1 PY 1995 VL 22 IS 13 BP 1821 EP 1824 DI 10.1029/95GL01749 PG 4 WC Geosciences, Multidisciplinary SC Geology GA RK059 UT WOS:A1995RK05900047 ER PT J AU JACKSON, JA SPILLER, R MILLING, ME AF JACKSON, JA SPILLER, R MILLING, ME TI PERSPECTIVES ON PETROLEUM SO GEOTIMES LA English DT Discussion C1 AM GEOL INST,ALEXANDRIA,VA 22302. RP JACKSON, JA (reprint author), US DOE,WASHINGTON,DC 20585, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER GEOLOGICAL INST PI ALEXANDRIA PA 4220 KING ST, ALEXANDRIA, VA 22302-1507 SN 0016-8556 J9 GEOTIMES JI Geotimes PD JUL PY 1995 VL 40 IS 7 BP 17 EP 19 PG 3 WC Geosciences, Multidisciplinary SC Geology GA RG495 UT WOS:A1995RG49500007 ER PT J AU BUSBY, RD LENHARD, RJ ROLSTON, DE AF BUSBY, RD LENHARD, RJ ROLSTON, DE TI AN INVESTIGATION OF SATURATION-CAPILLARY PRESSURE RELATIONS IN 2-FLUID AND 3-FLUID SYSTEMS FOR SEVERAL NAPLS IN DIFFERENT POROUS-MEDIA SO GROUND WATER LA English DT Article ID DRAINAGE; FLOW AB Lack of constitutive data has impeded efforts to model the subsurface transport of organic-liquid contaminants. To help fill this need, functional relationships between fluid saturations and capillary pressures were obtained using a unique fluid-retention cell. The functional relationships between water saturations and NAPL-water capillary pressures, and between total-liquid saturations and air-NAPL capillary presures in two- and three-fluid phase systems were measured directly during monotonic drainage of a fine quartz sand and a nonswelling loam soil. Additionally, measurements were made between water saturations and air-water capillary pressures for an air-water fluid system in both porous media. The NAPLs investigated were Soltrol 170(R), toluene, and trichloroethylene (TCE). Following the:measurements, the two- and three-fluid retention relations were compared to test the validity of extending two-phase saturation-pressure (S-P) relations to three-fluid systems. Good agreement was observed between the two- and three-fluid data for Soltrol 170(R), toluene, and TCE in both porous media. An S-P scaling format for two- and three-phase systems was also evaluated. Results indicate that a single multiphase retention function is suitable for describing two- and three-phase S-P relations in similar porous media; however, it is unclear whether the scaling factors can be predicted a priori from ratios of interfacial tensions. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV CALIF DAVIS, DAVIS, CA 95616 USA. RP BUSBY, RD (reprint author), ICF KAISER, RANCHO CORDOVA, CA 95742 USA. NR 13 TC 17 Z9 18 U1 1 U2 2 PU GROUND WATER PUBLISHING CO PI COLUMBUS PA 2600 GROUND WATER WAY, COLUMBUS, OH 43219 SN 0017-467X J9 GROUND WATER JI Ground Water PD JUL-AUG PY 1995 VL 33 IS 4 BP 570 EP 578 DI 10.1111/j.1745-6584.1995.tb00312.x PG 9 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA RG500 UT WOS:A1995RG50000007 ER PT J AU SILL, CW AF SILL, CW TI RAPID MONITORING OF SOIL, WATER, AND AIR DUSTS BY DIRECT LARGE-AREA ALPHA-SPECTROMETRY SO HEALTH PHYSICS LA English DT Article DE SPECTROMETRY, ALPHA; SOIL; PLUTONIUM; URANIUM ID IONIZATION-CHAMBER; SAMPLES AB During retrieval and disposition of wastes containing transuranium elements, continuous monitoring of the air, water, and soil for alpha emitters was required to ensure that safety limits were not exceeded and that the waste itself was not disturbed unknowingly. Direct measurements by alpha spectrometry were particularly promising because of their potential speed, sensitivity, and their ability to identify transuranium radionuclides under field conditions. Soil samples or settled dusts were finely ground, suspended in 80% ethanol, sprayed onto circular stainless steel pans, and dried on a hotplate. Water samples were mounted directly by spraying. Air dusts were collected with a high-volume air sampler on 20- by 25-cm membrane filters. The samples were then analyzed directly in a large pressurized gridded ionization chamber without further sample preparation. The lower limits of detection for 10-min counting times were 1.5 Bq g(-1) (40 pCi g(-1)) for 100-mg soil samples, and 4 x 10(-2) Bq m(-3) (10(-12) mu Ci mL(-1)) for a 10-min air sample taken at 0.4 m(3) min(-1) (14 cubic feet per minute) and counted without waiting for decay of radon progeny. RP SILL, CW (reprint author), LOCKHEED IDAHO TECHNOL CO, IDAHO NATL ENGN LAB, POB 1625, IDAHO FALLS, ID 83415 USA. NR 8 TC 8 Z9 9 U1 0 U2 2 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUL PY 1995 VL 69 IS 1 BP 21 EP 33 DI 10.1097/00004032-199507000-00004 PG 13 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA RF830 UT WOS:A1995RF83000004 PM 7790211 ER PT J AU PRICE, PN AF PRICE, PN TI THE REGRESSION EFFECT AS A CAUSE OF THE NONLINEAR RELATIONSHIP BETWEEN SHORT-TERM AND LONG-TERM RADON CONCENTRATION MEASUREMENTS SO HEALTH PHYSICS LA English DT Note DE RADON; STATISTICS; REGRESSION; RN-222, INDOOR AB The relationship between four-day charcoal canister radon measurements and year-long alpha-track detector measurements in 983 New Jersey homes has been recently examined by others. The ratio of canister measurement to long-term measurement for the homes in the survey, a common parameter of interest, was found to increase as the canister measurement increased. The examination presented considerable discussion of the variation of the ratios as functions of various parameters. Although we did not examine the raw data used in the study, it appears that many of the results (and perhaps those in other papers) are consistent with a simple model in which both the long-term and rescaled short-term measurements provide measurements with error of the annual-average radon concentration in the home with no nonlinearity or other unusual functional dependence on radon concentration. We provide an example and discussion of this result, which is due to the widely known but frequently misunderstood phenomenon called ''regression toward the mean,'' or simply the ''regression effect.'' This does not invalidate the work of others; we merely wish to bring attention to the fact that the results in these papers may have a very simple explanation. RP PRICE, PN (reprint author), LAWRENCE BERKELEY LAB, INDOOR ENVIRONM PROGRAM, 90-3058, BERKELEY, CA 94720 USA. NR 8 TC 4 Z9 4 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD JUL PY 1995 VL 69 IS 1 BP 111 EP 114 DI 10.1097/00004032-199507000-00011 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA RF830 UT WOS:A1995RF83000010 PM 7790203 ER PT J AU SCHIERENBECK, KA HAMRICK, JL MACK, RN AF SCHIERENBECK, KA HAMRICK, JL MACK, RN TI COMPARISON OF ALLOZYME VARIABILITY IN A NATIVE AND AN INTRODUCED SPECIES OF LONICERA SO HEREDITY LA English DT Article DE GENETIC VARIATION; INTRODUCED POPULATIONS; LONICERA JAPONICA; LONICERA SEMPERVIRENS; NATIVE POPULATIONS ID STARCH-GEL ELECTROPHORESIS; CASUARINA-CUNNINGHAMIANA; SUBDIVIDED POPULATIONS; GENETIC DIVERSITY; MATING SYSTEM; COMPILATION; NUMBER; PINE AB Levels of allozyme variation are compared between a diploid invasive plant species, Lonicera japonica Thunb. (2n=18) and its polyploid native congener, Lonicera sempevirens L. (2n=36). Both are woody perennials and were sampled within the native range of L. sempervirens in the south-eastern United States where L, japonica has been an invader since the late 19th century. Genetic structure and allozyme diversity were determined for nine and ten populations of L. sempervirens and L. japonica, respectively. Genetic variation within L. japonica is similar to that in other species with similar life history traits (per cent polymorphic loci, P-s=75 per cent, mean alleles per polymorphic locus, A(ps)=2.28, and total genetic diversity, H-t=0.216); L. sempervirens has even higher genetic variation than L. japonica (P-s=91 per cent, A(ps)=2.60 and H-t=0.283). Although both species have high levels of genetic diversity, this may be less important than their life history traits to their success in early successful habitats. However, establishment of a relationship between success in naturalization for woody perennials and levels of genetic diversity is hampered by the paucity of comparable records for other native:alien congeneric pairs. C1 WASHINGTON STATE UNIV,DEPT BOT,PULLMAN,WA 99163. SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. UNIV GEORGIA,DEPT BOT,ATHENS,GA 30602. UNIV GEORGIA,DEPT GENET,ATHENS,GA 30602. NR 50 TC 25 Z9 27 U1 0 U2 11 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0018-067X J9 HEREDITY JI Heredity PD JUL PY 1995 VL 75 BP 1 EP 9 DI 10.1038/hdy.1995.97 PN 1 PG 9 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA RH131 UT WOS:A1995RH13100001 ER PT J AU VANHOVE, MA AF VANHOVE, MA TI SURFACE CRYSTALLOGRAPHY - AN EDUCATIONAL REVIEW SO HETEROGENEOUS CHEMISTRY REVIEWS LA English DT Review ID ION-SCATTERING; RAY AB The field of surface and interface crystallography is reviewed, starting with a description of the major experimental techniques. Ordering principles and notation specific to surfaces are introduced. The notable trends among the hundreds of solved surface structures are discussed, including: surface relaxations and reconstructions (partly induced by adsorption), surface segregation, physisorption and chemisorption of atoms and molecules, and multilayer growth. RP VANHOVE, MA (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 46 TC 1 Z9 1 U1 1 U2 5 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1068-6983 J9 HETEROGEN CHEM REV JI Heterogeneous Chem. Rev. PD JUL-AUG PY 1995 VL 2 IS 2 BP 81 EP 89 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA RQ228 UT WOS:A1995RQ22800001 ER PT J AU SAVAGE, N AF SAVAGE, N TI PRICE VS RELIABILITY SO IEEE COMPUTER APPLICATIONS IN POWER LA English DT Letter RP SAVAGE, N (reprint author), US DOE,WASHINGTON,DC 20585, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0895-0156 J9 IEEE COMPUT APPL POW JI IEEE Comput. Appl. Power PD JUL PY 1995 VL 8 IS 3 BP 5 EP 5 PG 1 WC Computer Science, Interdisciplinary Applications; Engineering, Electrical & Electronic SC Computer Science; Engineering GA RF708 UT WOS:A1995RF70800001 ER PT J AU COMASKEY, B MORAN, BD ALBRECHT, GF BEACH, RJ AF COMASKEY, B MORAN, BD ALBRECHT, GF BEACH, RJ TI CHARACTERIZATION OF THE HEAT LOADING OF ND-DOPED YAG, YOS, YLF, AND GGG EXCITED AT DIODE PUMPING WAVELENGTHS SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID SLAB GEOMETRY LASER; ENERGY-STORAGE AB The parameter xi (xi) is proposed as an alternative to the traditional solid-state laser media heating parameter, chi (chi), xi is the ratio of heat produced to energy absorbed, and chi is the ratio of heat produced to the maximum stored energy in the upper laser level, The parameter xi is particularly relevant to diode pumped systems, We demonstrate an experimental xi characterization based on the determination of the steady state cooling rate (hence heating rate) of small sample crystals subjected to pump laser heating, Using measured fluorescent lifetimes of the samples and near zero doping (intrinsic) values, the doping independent (zero doping or zero quenching) parameters chi phi and xi phi are determined, The results for all samples are in excellent agreement with calculations based solely on energy defect and nonradiative quenching of the upper level. RP COMASKEY, B (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-495,LIVERMORE,CA 94550, USA. NR 15 TC 38 Z9 38 U1 2 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD JUL PY 1995 VL 31 IS 7 BP 1261 EP 1264 DI 10.1109/3.391089 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA RF219 UT WOS:A1995RF21900011 ER PT J AU WU, CH ZORY, PS EMANUEL, MA AF WU, CH ZORY, PS EMANUEL, MA TI CHARACTERIZATION OF THIN P-CLAD INGAAS SINGLE-QUANTUM-WELL LASERS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID GAIN AB Low-ridge, thin p-dad InGaAs single-quantum-well (SQW) lasers with shiny Bu contacts have been fabricated using a pulsed anodic oxidation technique Although the ridge is very low (130 nm), the lateral refractive index step is sufficiently large to provide strong lateral waveguiding. Pulsed current measurements of threshold current, operating wavelength, and lateral far field as a function of ridge width are presented and compared with measured values reported for low-ridge and oxide-defined lasers fabricated from conventional thick p-clad material. The CW performance characteristics of five-micron-wide, low-ridge, thin p-clad lasers are shown to be comparable to those of conventional InGaAs SQW high-ridge waveguide lasers. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP WU, CH (reprint author), UNIV FLORIDA,DEPT ELECT ENGN,GAINESVILLE,FL 32611, USA. NR 10 TC 12 Z9 12 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD JUL PY 1995 VL 7 IS 7 BP 718 EP 720 DI 10.1109/68.393184 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA RH308 UT WOS:A1995RH30800008 ER PT J AU CRAWFORD, H SCHNEIDER, RP CHOQUETTE, KD LEAR, KL AF CRAWFORD, H SCHNEIDER, RP CHOQUETTE, KD LEAR, KL TI TEMPERATURE-DEPENDENT CHARACTERISTICS AND SINGLE-MODE PERFORMANCE OF ALGAINP-BASED 670-690-NM VERTICAL-CAVITY SURFACE-EMITTING LASERS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB We report on temperature dependent characteristics and single mode performance of one-wave cavity, planar implanted, AlGaInP-based vertical-cavity surface emitting lasers. By optimizing the overlap between the gain peak and the cavity mode of the structure, we demonstrate record device performance, including 8.2 mW maximum output power and 11% power conversion efficiency for multimode operation and 1.9 mW and 9.6% power conversion efficiency for single mode operation at 687 mm. Improved performance at elevated temperatures is also achieved, with 1.5 mW output power demonstrated at 50 degrees C from a 15-mu m-diameter device. RP CRAWFORD, H (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 9 TC 7 Z9 7 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD JUL PY 1995 VL 7 IS 7 BP 724 EP 726 DI 10.1109/68.393186 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA RH308 UT WOS:A1995RH30800010 ER PT J AU ANANT, K DOWLA, F RODRIGUE, G AF ANANT, K DOWLA, F RODRIGUE, G TI VECTOR QUANTIZATION OF ECG WAVELET COEFFICIENTS SO IEEE SIGNAL PROCESSING LETTERS LA English DT Article ID DATA-COMPRESSION AB An improved wavelet compression algorithm for ECG signals has been developed with the use of vector quantization on wavelet coefficients. Vector quantization on scales of long duration and low dynamic range retains feature integrity of the ECG with a very low bit-per-sample rage. Preliminary results indicate that the proposed method excels over standard techniques for high fidelity compression. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP ANANT, K (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616, USA. NR 11 TC 14 Z9 16 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1070-9908 J9 IEEE SIGNAL PROC LET JI IEEE Signal Process. Lett. PD JUL PY 1995 VL 2 IS 7 BP 129 EP 131 DI 10.1109/97.392402 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA RH307 UT WOS:A1995RH30700001 ER PT J AU FENOUIL, LA LYNN, S AF FENOUIL, LA LYNN, S TI STUDY OF CALCIUM-BASED SORBENTS FOR HIGH-TEMPERATURE H2S REMOVAL .1. KINETICS OF H2S SORPTION BY UNCALCINED LIMESTONE SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID SULFATION; SULFUR AB In about 160 experiments, +6 mesh (1-2 mm diameter) limestone samples were exposed to an atmosphere of CO2 (87-88%), H-2 (1-2%), CO (4-5%), H2O (4-5%), and H2S (0.5-1.85%) for various temperatures (570-860 degrees C) and durations (5-240 min). Limestone sulfidation was followed quantitatively as well as qualitatively to elucidate the reaction mechanism. The morphology of the inside and of the outside of reacted limestone samples was observed with a scanning electron microscope, and X-ray maps of the sulfur content of the reacted samples were generated. The reaction between H2S and limestone is first-order with respect to the H2S partial pressure in the 560-660 degrees C range, where the kinetics is controlled by the chemical reaction with an activation energy of about 39 kcal/mol. Between 660 and 710 degrees C the reaction rate decreases as the temperature increases and the apparent order of the reaction changes from first- to half-order. Finally, in the 710-860 degrees C range, the reaction becomes controlled by solid-state diffusion through the CaS product layer with an activation energy of 30-40 kcal/mol. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FENOUIL, LA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA. NR 24 TC 41 Z9 42 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD JUL PY 1995 VL 34 IS 7 BP 2324 EP 2333 DI 10.1021/ie00046a014 PG 10 WC Engineering, Chemical SC Engineering GA RH928 UT WOS:A1995RH92800014 ER PT J AU FENOUIL, LA LYNN, S AF FENOUIL, LA LYNN, S TI STUDY OF CALCIUM-BASED SORBENTS FOR HIGH-TEMPERATURE H2S REMOVAL .2. KINETICS OF H2S SORPTION BY CALCINED LIMESTONE SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID SURFACE-AREA; PARTICLES; OXIDE; CALCINATION; SULFUR AB Samples of calcined limestone particles having a diameter of about 1 mm were exposed to simulated coal gases containing between 500 and 18 000 ppm H2S for temperatures ranging from 560 to 1100 degrees C in a differential tube reactor. The formation of CaS was followed quantitatively as well as qualitatively to elucidate the reaction mechanism. Contrary to the limited conversion of CaCO3 to CaS, it was found that the limestone particles could be completely converted to CaS by 1% H2S in about 1 h if the particles are precalcined or if the rate of calcination is higher than the rate of sulfidation. The reaction then takes place between CaO and H2S and follows a shrinking-core mechanism. The reaction kinetics is controlled by the diffusion of H2S through the pores of the CaS product layer formed around the lime particle (effective diffusivity between 2.8 x 10(-6) and 5.1 x 10(-6) m(2)/s). The kinetics of the sorption of H2S by CaO is relatively insensitive to the reaction temperature, and the reaction rate does not decrease significantly when the CaO is severely sintered for several hours at 1050 degrees C prior to sulfidation. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FENOUIL, LA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA. NR 18 TC 42 Z9 50 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD JUL PY 1995 VL 34 IS 7 BP 2334 EP 2342 DI 10.1021/ie00046a015 PG 9 WC Engineering, Chemical SC Engineering GA RH928 UT WOS:A1995RH92800015 ER PT J AU FENOUIL, LA LYNN, S AF FENOUIL, LA LYNN, S TI STUDY OF CALCIUM-BASED SORBENTS FOR HIGH-TEMPERATURE H2S REMOVAL .3. COMPARISON OF CALCIUM-BASED SORBENTS FOR COAL-GAS DESULFURIZATION SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID LIMESTONE; SULFATION; DOLOMITE; SULFUR; CALCINATION; SULFIDATION; REACTIVITY; CARBONATES; DIOXIDE; OXIDE AB H2S sorption by 18-35 mesh particles (average mass radius of 0.40 mm) of three different calcium-based sorbents (limestone, CaCO3; dolomitic limestone, [MgCO3-CaCO3](1)[CaCO3](3); dolomite, MgCO3-CaCO3) was tested under simulated coal gas in a differential tube reactor. Two fundamentally different behaviors were observed. Above the calcination temperature of CaCO3, complete conversion of CaCO3 to CaS can be achieved with all three sorbents; the reaction rate increases as the magnesium-to-calcium ratio increases in the sorbent and the reaction rate is controlled by the diffusion of H2S through the CaS product layer and by the kinetics of the calcination of CaCO3 to CaO. However, below the calcination temperature of CaCO3 (about 900 degrees C under 1 bar of CO2), less than 20% of the CaCO3 in limestone can be converted to CaS compared to 100% in dolomite. For the dolomitic Limestone, all the calcium atoms associated with the dolomite regions can be converted to CaS whereas only 20% of those associated with the limestone regions can be converted. Above 710 degrees C, the sulfidation rate of dolomite and dolomitic limestone is controlled by the diffusion of H2S through the product layer. Below 710 degrees C, the kinetics of calcination of MgCO3 as well as the rate of the chemical reaction between CaCO3 and H2S become the limiting steps in the overall reaction kinetics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FENOUIL, LA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA. NR 29 TC 31 Z9 34 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD JUL PY 1995 VL 34 IS 7 BP 2343 EP 2348 DI 10.1021/ie00046a016 PG 6 WC Engineering, Chemical SC Engineering GA RH928 UT WOS:A1995RH92800016 ER PT J AU CHEN, IMA MARKOWITZ, VM AF CHEN, IMA MARKOWITZ, VM TI AN OVERVIEW OF THE OBJECT PROTOCOL MODEL (OPM) AND THE OPM DATA MANAGEMENT TOOLS SO INFORMATION SYSTEMS LA English DT Article DE DATA MANAGEMENT TOOLS; OBJECT DATA MODEL; SCIENTIFIC DATABASE AB In this paper, we overview the Object-Protocol Model (OPM) and a suite of data management tools based on OPM. OPM is a data model that allows specifying database structures and queries in terms of objects and protocols specific to scientific (e.g., molecular biology laboratory) applications. Thus, scientific experiments and their resources can be described using OPM in a unified way. OPM data management tools provide facilities for specifying and querying relational databases in terms of OPM constructs, and automatically generate database specifications and queries for implementing OPM on top of commercial relational database management systems (DBMSs). OPM tools increase the efficiency of developing scientific databases using relational DBMSs, while insulating scientists from the underlying DBMSs. RP CHEN, IMA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV INFORMAT & COMP SCI,DATA MANAGEMENT RES & DEV GRP,BERKELEY,CA 94720, USA. NR 33 TC 48 Z9 48 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0306-4379 J9 INFORM SYST JI Inf. Syst. PD JUL PY 1995 VL 20 IS 5 BP 393 EP 418 DI 10.1016/0306-4379(95)00021-U PG 26 WC Computer Science, Information Systems SC Computer Science GA RL514 UT WOS:A1995RL51400002 ER PT J AU CHEN, JB ANGELICI, RJ AF CHEN, JB ANGELICI, RJ TI REACTIONS OF (ETA(5)-C(5)ME(5))IR(2,5-DIMETHYLTHIOPHENE) WITH S-8, O-2, SO2 AND CS2 SO INORGANICA CHIMICA ACTA LA English DT Article DE THIOPHENE COMPLEXES; IRIDIUM COMPLEXES; SULFUR; OXYGEN; SULFUR DIOXIDE; CARBON DISULFIDE; CRYSTAL STRUCTURES ID TRANSITION-METAL-COMPLEXES; COORDINATED THIOPHENE; BASE HYDROLYSIS; C-H; SULFUR; LIGANDS; REACTIVITY; CLEAVAGE; IRIDIUM; CP-STAR-IR(2,5-DIMETHYLTHIOPHENE) AB Both isomers, 1 and 2, of Cp*Ir(2,5-Me(2)T), where 2,5-dimethylthiophene is either eta(4)- or C,S-coordinated to the iridium, react to give the same products. With S-8, they give (Cp*Ir)(2)S-8 (3) whose X-ray-determined structure shows the two Cp*Ir units to be linked by two S-4 ligands. 3 . CH2Cl2 crystallizes in the monoclinic space group P2(1)/c, with a = 14.224(5), b = 12.795(2), c = 17.094(7) Angstrom, beta = 103.77(2)degrees, V = 3022(2) Angstrom(3) and Z = 4. The reactions of 1 and 2 with O-2, give an acylthiolate product Cp*Ir(eta(4)-SC(3)H(2)MeC(=O)Me) (4) in which a C-S bond of the 2,5-Me(2)T ligand is cleaved and an oxygen atom is incorporated at an alpha-carbon. Both 1 and 2 form the same adduct Cp*Ir(C,S-2,5-Me(2)T)(SO2) (5) with SO2; spectroscopic data suggest that the SO2 is coordinated to Ir. With CS2, 1 and 2 give a product Cp*Ir(eta(4)-2,5-Me(2)T)(CS2) (6) in which CS2 acts as a Lewis acid by coordinating to the sulfur of the eta(4)-2,5-Me(2)T ligand. These reactions illustrate the versatile reactivity of Cp*Ir(2,5-Me(2)T), which acts as a reducing agent with S-8 and O-2, as a Lewis acid with SO2 and as a base with CS2. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 34 TC 17 Z9 17 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD JUL PY 1995 VL 235 IS 1-2 BP 61 EP 67 DI 10.1016/0020-1693(95)90046-9 PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA RP069 UT WOS:A1995RP06900010 ER PT J AU CHA, YS MINKOWYCZ, WJ SEOL, SY AF CHA, YS MINKOWYCZ, WJ SEOL, SY TI TRANSVERSE TEMPERATURE DISTRIBUTION AND HEAT-GENERATION RATE IN COMPOSITE SUPERCONDUCTORS SUBJECTED TO CONSTANT THERMAL DISTURBANCE SO INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER LA English DT Article AB Analytical solution of one-dimensional, transient heat conduction with a distributed heat source is obtained to predict the transverse temperature distribution and heat generation rate per unit volume of the composite superconductor. The solution indicates that temperature distribution and heat generation rate depend on three dimensionless parameters: the dimensionless external disturbance w(0), the dimensionless interface temperature theta*, and the dimensionless parameter phi that is dependent on the thickness and the thermal conductivity of the superconductor. Results of transient and steady-state solutions are presented. It is shown that the heat generation rate per unit volume of the composite, Q/Q(c), is directly proportional to the current in the stabilizer. C1 UNIV ILLINOIS,DEPT MECH ENGN,CHICAGO,IL 60607. CHONNAM NATL UNIV,DEPT MECH ENGN,KWANGJU 500757,SOUTH KOREA. RP CHA, YS (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 8 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0735-1933 J9 INT COMMUN HEAT MASS JI Int. Commun. Heat Mass Transf. PD JUL-AUG PY 1995 VL 22 IS 4 BP 461 EP 474 DI 10.1016/0735-1933(95)00031-S PG 14 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA RL026 UT WOS:A1995RL02600001 ER PT J AU OGREN, PJ HESSLER, JP AF OGREN, PJ HESSLER, JP TI SENSITIVITY AND CORRELATION-ANALYSIS OF THE PHYSICAL PARAMETERS IN ABSORPTION, 4-WAVE-MIXING, AND SCHLIEREN EXPERIMENTS SO INTERNATIONAL JOURNAL OF CHEMICAL KINETICS LA English DT Article ID RECOMBINATION REACTION CH3+CH3->C2H6; SHOCK-TUBE; CHEMICAL-KINETICS; HIGH-TEMPERATURES; METHYL RADICALS; RATE-CONSTANT; LASER; OH AB Experimental data that are used to determine rate coefficients depend not only upon reaction rates but also the physical properties of the measured species. Sensitivity coefficients are presented for the physical parameters of three general experimental techniques: a signal linearly dependent on the concentration of a species, a signal quadratically dependent on concentration, and a schlieren signal, which depends upon a bulk property of the system. With these, both the physical and chemical parameters of a model may be treated on a comparable basis. The similarities and differences between these techniques are illustrated in a simple example of radical formation via first-order precursor decomposition followed by second-order recombination. The results are then applied to two important examples: H-2 + O-2 and CH3 + CH3. In almost all cases, the experimental data contains more information about the physical parameters, such as the optical cross section, than the kinetic rate coefficients. Furthermore, if a physical parameter is not properly treated; strong correlations between it and rate coefficients will introduce significant systematic biases in the rate coefficient. (C) 1995 John Wiley and Sons, Inc. C1 EARLHAM COLL,DEPT CHEM,RICHMOND,IN 47374. ARGONNE NATL LAB,DIV CHEM,GAS PHASE CHEM DYNAM GRP,ARGONNE,IL 60439. NR 37 TC 2 Z9 2 U1 0 U2 0 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0538-8066 J9 INT J CHEM KINET JI Int. J. Chem. Kinet. PD JUL PY 1995 VL 27 IS 7 BP 719 EP 738 DI 10.1002/kin.550270710 PG 20 WC Chemistry, Physical SC Chemistry GA RD533 UT WOS:A1995RD53300009 ER PT J AU NGUYEN, HD AF NGUYEN, HD TI PROBABILISTIC MODELING OF MOISTURE FLOW IN LAYERED VADOSE ZONE - APPLICATIONS TO WASTE SITE PERFORMANCE ASSESSMENT SO INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE LA English DT Article ID SPATIAL VARIABILITY; STOCHASTIC ANALYSIS; SUBSURFACE FLOWS AB The problem of moisture flow through layers of statistically homogeneous soils in the vadose zone is studied by a probabilistic approach. A random number generator is used to characterize the spatial variability of hydraulic properties in such a way consistent with the probability distribution function observed in field measurements. The water travel time is calculated from the solution of the pressure head-based Richards' equation obtained by means of the Galerkin finite element method in conjunction with the backward Euler method for time advancement. Applications are directed toward burial sites at the Nevada Test Site (NTS) and at the Idaho National Engineering Laboratory (INEL). Uncertainties in the travel time due to the uncertain soil properties are quantified by an appropriate statistical parameter deduced from the travel times of the realizations simulated. RP NGUYEN, HD (reprint author), IDAHO NATL ENGN LAB,POB 1625,MS 3808,IDAHO FALLS,ID 83415, USA. NR 15 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 0020-7225 J9 INT J ENG SCI JI Int. J. Eng. Sci. PD JUL PY 1995 VL 33 IS 9 BP 1345 EP 1355 DI 10.1016/0020-7225(95)00011-L PG 11 WC Engineering, Multidisciplinary SC Engineering GA QX705 UT WOS:A1995QX70500010 ER PT J AU NOBEL, PS WANG, N BALSAMO, RA LOIK, ME HAWKE, MA AF NOBEL, PS WANG, N BALSAMO, RA LOIK, ME HAWKE, MA TI LOW-TEMPERATURE TOLERANCE AND ACCLIMATION OF OPUNTIA SPP AFTER INJECTING GLUCOSE OR METHYLGLUCOSE SO INTERNATIONAL JOURNAL OF PLANT SCIENCES LA English DT Article ID SUBZERO TEMPERATURES; FREEZING TOLERANCE; WATER RELATIONS; PROLINE; SUCROSE; PLANTS; CACTUS AB Cellular tolerances to subzero temperatures, as judged by the accumulation of a vital stain, were compared between Opuntia ficus-indica, a widely cultivated but low-temperature-sensitive cactus, and the widely ranging, winter-hardy Opuntia humifusa. Lowering the day/night temperatures from 30 degrees 20 degrees C to 10 degrees/0 degrees C increased tolerance of lower temperatures (acclimation) and generally increased the cladode (stem segment) concentrations of the putative cryoprotectants fructose, glucose, sucrose, mannitol, sorbitol, total amino acids, and proline. Compared to reducing the day/night air temperatures by 20 degrees C, injecting 400 mM glucose into the cladodes induced about 70% greater low-temperature tolerance (5 degrees C for O. ficus-indica and 19 degrees C for 0. humifusa). The glucose injections caused an even greater percentage increase in most of the putative cryoprotectants but reduced the concentration of total amino acids and proline. After the reduction of temperatures or glucose injections, increases in total solutes were greater in the cladodes for the species exhibiting greater low-temperature tolerance and acclimation, O. humifusa. However, the relative changes in the concentrations of specific sugars and polyhydroxy alcohols were inconsistent with the relative changes in low-temperature tolerance caused by glucose injections compared with lowering the air temperatures for both species. Moreover, the injection of 400 mM of the nonmetabolizable 3-O-methylglucose into plants at 30 degrees/20 degrees C caused an increase in low-temperature tolerance similar to that caused by reducing the air temperatures by 20 degrees C but without a concomitant increase in the concentrations of six putative cryoprotectants. The relative ability of opuntias to tolerate subzero temperatures apparently depends on the tissue water, not individually on any of the six putative cryoprotectants examined. C1 UNIV CALIF LOS ANGELES,DEPT BIOL,LOS ANGELES,CA 90024. RP NOBEL, PS (reprint author), UNIV CALIF LOS ANGELES,US DOE LAB,LOS ANGELES,CA 90024, USA. NR 30 TC 12 Z9 14 U1 1 U2 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 1058-5893 J9 INT J PLANT SCI JI Int. J. Plant Sci. PD JUL PY 1995 VL 156 IS 4 BP 496 EP 504 DI 10.1086/297272 PG 9 WC Plant Sciences SC Plant Sciences GA RN578 UT WOS:A1995RN57800012 ER PT J AU WELLER, RE DAGLE, GE BUSCHBOM, RL PARK, JF AF WELLER, RE DAGLE, GE BUSCHBOM, RL PARK, JF TI EXAMINATION OF TESTICULAR-TUMORS IN THE BEAGLE DOG EXPOSED TO INHALED PLUTONIUM SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY LA English DT Article ID TUMORS; TESTIS; GONADS; RAT AB Gross and light microscopic features of testicular neoplasms were examined in the male beagle dog used in three studies to examine the life-span effects of inhaled plutonium (Pu). One hundred and sixty-six cases of testicular neoplasia (TN) occurred among 105 dogs that ranged in age from 7 . 5 to 17 . 7 years at the time of diagnosis. The 166 cases of TN comprised 113 interstitial cell tumours, 27 seminomas in situ, 19 seminomas, and seven Sertoli cell tumours. Serum testosterone and estradiol 17-beta concentrations, and the serum testosterone-to-oestradiol ratio were determined in 39 dogs with TN and in five clinically normal, sexually intact, age-matched cohorts. Serum hormone concentrations did not differ significantly among tumour types or between dogs with neoplasms and age-matched cohorts. There was a significant relationship between initial lung deposition (ILD) of Pu and activity in the testis (Bq/g testis). The slope of the relationship was 0 . 35, 0 . 89 and 0 . 91 for (PuO2)-Pu-239, (PuO2)-Pu-238 and Pu-239(NO3)(4) respectively. Pu in the testis at long times (> 5 years) after inhalation was between 0 . 0001 and 0 . 03% ILD, depending on the physicochemical form of Pu. Although the mean activity of Pu in the testis of dogs was higher in those life-span studies employing (PuO2)-Pu-238 and Pu-239(NO3)4, the cumulative proportion of dogs with tumours, the distribution of tumour types, and mean time to first tumour was not significantly different among the three studies or dose groups, including controls, within a study. RP WELLER, RE (reprint author), PACIFIC NW LAB, DEPT BIOL & CHEM, POB 999,P7-52, RICHLAND, WA 99352 USA. NR 25 TC 4 Z9 4 U1 0 U2 2 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0955-3002 J9 INT J RADIAT BIOL JI Int. J. Radiat. Biol. PD JUL PY 1995 VL 68 IS 1 BP 63 EP 70 DI 10.1080/09553009514550931 PG 8 WC Biology; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA RP034 UT WOS:A1995RP03400009 PM 7629439 ER PT J AU JING, L TSANG, CF STEPHANSSON, O AF JING, L TSANG, CF STEPHANSSON, O TI DECOVALEX - AN INTERNATIONAL COOPERATIVE RESEARCH-PROJECT ON MATHEMATICAL-MODELS OF COUPLED THM PROCESSES FOR SAFETY ANALYSIS OF RADIOACTIVE-WASTE REPOSITORIES SO INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS LA English DT Article AB An inter national co-operative research project has been established under the name DECOVALEX for theoretical and experimental studies of coupled thermal, hydrological and mechanical processes in hard rocks. The capability of modelling coupled phenomena is of particular importance to the safety assessment of geologic disposal of radioactive waste materials. Different mathematical models and computer codes have been developed by different national research teams and these are used to study the so-called bench mark test and test case problems developed within this project. Bench mark tests are defined as initial-boundary value problems of a generic nature, and test cases are experimental investigations of part or full aspects of coupled thermohydro-mechanical processes in hard rocks. Presented in this introductory paper are the motivation, organization and approaches of the project, definitions of bench mark tests and test case problems and descriptions of mathematical models used in Phase I of the DECOVALEX project. A brief introduction to the Phase II and Phase III of the project is also presented. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. RP JING, L (reprint author), ROYAL INST TECHNOL,DEPT CIVIL & ENVIRONM ENGN,DIV ENGN GEOL,S-10044 STOCKHOLM,SWEDEN. NR 19 TC 48 Z9 74 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0148-9062 J9 INT J ROCK MECH MIN JI Int. J. Rock Mech. Min. Sci. PD JUL PY 1995 VL 32 IS 5 BP 389 EP 398 DI 10.1016/0148-9062(95)00031-B PG 10 WC Engineering, Geological; Mining & Mineral Processing SC Engineering; Mining & Mineral Processing GA RK625 UT WOS:A1995RK62500002 ER PT J AU MAKURAT, A AHOLA, M KHAIR, K NOORISHAD, J ROSENGREN, L RUTQVIST, J AF MAKURAT, A AHOLA, M KHAIR, K NOORISHAD, J ROSENGREN, L RUTQVIST, J TI THE DECOVALEX TEST - CASE ONE SO INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS LA English DT Article AB This test case is based on experimental data from a study of the mechanical and hydraulic reaction of a natural rough joint upon normal and shear stress loading. The test was conducted in NGI's Coupled Shear Flow Test apparatus, which allows large diameter jointed rock cores to be tested under controlled boundary stresses with multiple loading-unloading cycles, Five teams have modelled two joints, using finite and discrete element codes with different joint constitutive laws, The simulation results agree well with the experimental data during pure normal stress loading, and less well for shear displacement induced joint dilation. C1 CTR NUCL WASTE REGULATORY ANAL,SAN ANTONIO,TX. ATOM ENERGY CANADA LTD,PINAWA,MB,CANADA. LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA. ITASCA GEOMECH AB,STOCKHOLM,SWEDEN. ROYAL INST TECHNOL,STOCKHOLM,SWEDEN. RP MAKURAT, A (reprint author), NORWEGIAN GEOTECH INST,POB 3930,ULLEVAAL HAGEBY,N-0806 OSLO,NORWAY. RI Rutqvist, Jonny/F-4957-2015 OI Rutqvist, Jonny/0000-0002-7949-9785 NR 10 TC 5 Z9 8 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0148-9062 J9 INT J ROCK MECH MIN JI Int. J. Rock Mech. Min. Sci. PD JUL PY 1995 VL 32 IS 5 BP 399 EP 408 DI 10.1016/0148-9062(95)00032-C PG 10 WC Engineering, Geological; Mining & Mineral Processing SC Engineering; Mining & Mineral Processing GA RK625 UT WOS:A1995RK62500003 ER PT J AU CHAN, T KHAIR, K JING, L AHOLA, M NOORISHAD, J VUILLOD, E AF CHAN, T KHAIR, K JING, L AHOLA, M NOORISHAD, J VUILLOD, E TI INTERNATIONAL COMPARISON OF COUPLED THERMO-HYDRO-MECHANICAL MODELS OF A MULTIPLE-FRACTURE BENCH-MARK PROBLEM - DECOVALEX PHASE-I, BENCH-MARK TEST-2 SO INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS LA English DT Article ID ROCKS AB An international inter-code bench mark comparison has been carried out under the auspices of DECOVALEX, an international cooperative project for the development of; coupled (thermo-hydro-mechanical) models and their validation against experiments in nuclear waste isolation, The subject bench mark problem, designated BMT2, involves a system of nine blocks of intact hard rock separated by two pairs of relatively soft fractures. The coupled processes of conductive, convective and dispersive heat transport; nonisothermal fluid flow; and thermo-mechanical stresses and displacements in both the intact rock and the fractures were simulated, Five research teams representing four European and North American countries participated in this bench-marking exercise using two fundamentally different types of numerical models, i.e. finite-element models and distinct-element models. All teams simulated the fractures as discrete features, For the coupled hydro-mechanical behaviour of the fractures the modelling teams have used either the empirical, nonlinear Barton-Bandis-Bakhtar constitutive relation or a simpler Coulomb friction like stress-deformation relation in conjunction with Snow's parallel-plate fracture flow model. For this bench mark problem it was found that (1) heat convection significantly affects the distribution of temperature, thermal stresses and displacements; and (2) the predominant coupled effect is fracture closure caused by thermal expansion of the rock blocks, Comparison of the modelling results obtained by the various teams have indicated very good overall agreement, In particular, the results calculated using finite-element and distinct-element codes are quite similar, Practically all the discrepancies among simulation results can be ascribed to different idealization, constitutive relations, or parameter values adopted by the participating research teams, In-depth discussions among participants have enhanced our understanding of the simulated processes and provided guidance for model improvements. C1 ROYAL INST TECHNOL,S-10077 STOCKHOLM,SWEDEN. SW RES INST,CTR NUCL WASTE REGULATORY ANAL,SAN ANTONIO,TX 78238. LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. INERIS,MECAN TERRAINS LAB,F-54042 NANCY,FRANCE. RP CHAN, T (reprint author), AECL RES,WHITESHELL LABS,PINAWA,MB R0E 1L0,CANADA. NR 21 TC 16 Z9 24 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0148-9062 J9 INT J ROCK MECH MIN JI Int. J. Rock Mech. Min. Sci. PD JUL PY 1995 VL 32 IS 5 BP 435 EP 452 DI 10.1016/0148-9062(95)00034-E PG 18 WC Engineering, Geological; Mining & Mineral Processing SC Engineering; Mining & Mineral Processing GA RK625 UT WOS:A1995RK62500005 ER PT J AU MILLER, GK AF MILLER, GK TI STRESSES IN A SPHERICAL PRESSURE-VESSEL UNDERGOING CREEP AND DIMENSIONAL CHANGES SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article ID PARTICLES AB A solution is presented for stresses and displacements in a thick spherical shell subjected to internal and external pressure loads. In addition to elastic behavior, the shell material is assumed to undergo both creep and dimensional changes as the shell is pressurized. The dimensional changes considered are (1) anisotropic swelling or shrinkage induced by neutron irradiation of the shell, or (2) isotropic thermal expansion with a temperature gradient through the shell wall. This solution was developed for pressure vessel modeling of fuel and target particles of the New Production Modular High Temperature Gas-Cooled Reactor (NP-MHTGR), where it is used in predicting particle failure probabilities for large particle batches. It has the advantage that it is computationally much faster than finite element or finite difference approaches. The creep behavior is initially represented with a 4-parameter linear viscoelastic model to include transient and steady-state components, then is extended to more general linear viscoelastic models. The analytical approach, which is applied to a spherical geometry here, may be useful in solving for similar loadings on other vessel geometries. RP MILLER, GK (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 11 TC 8 Z9 8 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD JUL PY 1995 VL 32 IS 14 BP 2077 EP 2093 DI 10.1016/0020-7683(94)00197-5 PG 17 WC Mechanics SC Mechanics GA RC178 UT WOS:A1995RC17800009 ER PT J AU BOONE, DR LIU, YT ZHAO, ZJ BALKWILL, DL DRAKE, GR STEVENS, TO ALDRICH, HC AF BOONE, DR LIU, YT ZHAO, ZJ BALKWILL, DL DRAKE, GR STEVENS, TO ALDRICH, HC TI BACILLUS-INFERNUS SP-NOV, AN FE(III)-REDUCING AND MN(IV)-REDUCING ANAEROBE FROM THE DEEP TERRESTRIAL SUBSURFACE SO INTERNATIONAL JOURNAL OF SYSTEMATIC BACTERIOLOGY LA English DT Article ID GROWTH; MICROBIOLOGY; REDUCTION; BACTERIA; WATER; IRON AB Bacillus infernus sp, nov. was isolated from ca, 2,700 m below the land surface in the Taylorsville Triassic Basin in Virginia. B. infernus was a strict anaerobe that grew on formate or lactate with Fe(III), MnO2, trimethylamine oxide, or nitrate (reduced to nitrite) as an electron acceptor, and it also grew fermentatively on glucose, Type strain TH-23 and five reference strains were gram-positive rods that were thermophilic (growth occurred at 61 degrees C), halotolerant (good growth occurred in the presence of Na+ concentrations up to 0.6 M), and very slightly alkaliphilic (good growth occurred at pH 7.3 to 7.8). A phylogenetic analysis of its 16S rRNA indicated that B. infernus should be classified as a new species of the genus Bacillus. B. infernus is the only strictly anaerobic species in the genus Bacillus. C1 OREGON GRAD INST SCI & TECHNOL, DEPT CHEM BIOCHEM & MOLEC BIOL, PORTLAND, OR 97291 USA. FLORIDA STATE UNIV, DEPT BIOL SCI, TALLAHASSEE, FL 32306 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. UNIV FLORIDA, DEPT MICROBIOL & CELL SCI, GAINESVILLE, FL 32601 USA. RP BOONE, DR (reprint author), OREGON GRAD INST SCI & TECHNOL, DEPT ENVIRONM SCI & ENGN, POB 91000, PORTLAND, OR 97291 USA. NR 39 TC 165 Z9 170 U1 3 U2 34 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0020-7713 J9 INT J SYST BACTERIOL JI Int. J. Syst. Bacteriol. PD JUL PY 1995 VL 45 IS 3 BP 441 EP 448 PG 8 WC Microbiology SC Microbiology GA RG937 UT WOS:A1995RG93700004 PM 8590670 ER PT J AU SAMUEL, MA AF SAMUEL, MA TI ESTIMATING PERTURBATIVE COEFFICIENTS IN QUANTUM-FIELD THEORY AND STATISTICAL PHYSICS SO INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS LA English DT Article ID ANOMALOUS MAGNETIC-MOMENT AB We present a method for estimating perturbative coefficients in quantum field theory and statistical physics. We are able to obtain reliable error bars for each estimate. The results are in excellent agreement with known exact calculation. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP SAMUEL, MA (reprint author), OKLAHOMA STATE UNIV,DEPT PHYS,STILLWATER,OK 74078, USA. NR 20 TC 7 Z9 7 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0020-7748 J9 INT J THEOR PHYS JI Int. J. Theor. Phys. PD JUL PY 1995 VL 34 IS 7 BP 1113 EP 1122 DI 10.1007/BF00671370 PG 10 WC Physics, Multidisciplinary SC Physics GA RH919 UT WOS:A1995RH91900011 ER PT J AU LESUER, DR KIPOUROS, GJ AF LESUER, DR KIPOUROS, GJ TI LIGHTWEIGHT MATERIALS FOR TRANSPORTATION APPLICATIONS SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Editorial Material C1 TECH UNIV NOVA SCOTIA,DEPT MIN & MET ENGN,HALIFAX,NS,CANADA. RP LESUER, DR (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA, USA. NR 3 TC 9 Z9 9 U1 0 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD JUL PY 1995 VL 47 IS 7 BP 17 EP 17 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA RG750 UT WOS:A1995RG75000002 ER PT J AU CORT, B WARD, JW VIGIL, FA HAIRE, RG AF CORT, B WARD, JW VIGIL, FA HAIRE, RG TI RESISTIVITY STUDIES OF CUBIC AMERICIUM HYDRIDES FROM 20 TO 300 K SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE RESISTIVITY; CUBIC AMERICIUM HYDRIDES ID SYSTEM AB We report low temperature resistivity measurements of cubic americium hydrides. For all compositions AmH2+n 0 less than or equal to x less than or equal to 0.7, there is a change in temperature dependence of the resistivity at 120 K that is yet unexplained. For AmH26, there is an additional change observed near 210 K typical of long-range ordering of octahedral hydrogen that is typical of fluorite-type neptunium, plutonium, and rare-earth hydrides. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP CORT, B (reprint author), LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545, USA. NR 9 TC 1 Z9 1 U1 1 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 1 PY 1995 VL 224 IS 2 BP 237 EP 240 DI 10.1016/0925-8388(95)01520-5 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RJ675 UT WOS:A1995RJ67500017 ER PT J AU TANG, J LI, Q GSCHNEIDER, KA AF TANG, J LI, Q GSCHNEIDER, KA TI SUPERCONDUCTIVITY IN LACD2 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE SUPERCONDUCTIVITY; HEAT CAPACITY; RESISTIVITY ID HEAT-CAPACITY; STATE AB Low temperature heat capacity and resistivity measurements indicated that LaCd2 is a low temperature superconductor (T-c=1.44 K). It is a conventional weak-coupling superconductor with a coupling constant lambda approximate to 0.47. The electronic specific heat coefficient gamma (8.0 mJ mol(-1) K-2) and Debye temperature Theta(D) (186 K) were determined from heat capacity data. The covalent bonding in LaCd2 is probably responsible for preventing the softening of the phonon spectrum, which probably accounts for the low T-2 value. LaCd2 is the first superconducting intermetallic compound that has the CeCd2-type structure. However, compared with the lanthanum Laves phase compound superconductors, the structural difference may be insignificant in determining the superconducting properties. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 17 TC 0 Z9 0 U1 1 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 1 PY 1995 VL 224 IS 2 BP 249 EP 252 DI 10.1016/0925-8388(95)01529-9 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RJ675 UT WOS:A1995RJ67500020 ER PT J AU THOMA, DJ PEREPEZKO, JH AF THOMA, DJ PEREPEZKO, JH TI A GEOMETRIC ANALYSIS OF SOLUBILITY RANGES IN LAVES PHASES SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE SOLUBILITY RANGES; GEOMETRIC FACTORS; HOMOGENEITY; LAVES PHASES ID STABILITY AB Laves phases nominally occur at the AB(2) stoichiometry but can exhibit a range of solubility involving non-stoichiometric compositions in binary alloys. The solubility trends in the reported binary C14, C15 and C36 structures have been analyzed in terms of the atom size requirements that are known to stabilize the Laves phases. For example, Laves phases exist at metallic diameter ratios (D-A/D-B) between similar to 1.05 and 1.68 with the ideal diameter ratio existing at similar to 1.225. Although less than 25% of the Laves phases within the D-A/D-B ratios of 1.05-1.68 have defined ranges of homogeneity, the frequency of the number of intermetallic phases exhibiting any solubility range is increased by a factor of approximately two to three within specific D-A/D-B ratios of 1.12-1.26 (C14 and C36 phases) and 1.1-1.35 (C15 phases). The upper and lower bounds for the C15 structures can be physically defined as the limits at which the A-B atom distance contractions are greater than the A-A atom distance and B-B atom distance contractions, respectively. For all three main polytypes the occurrence of solubility corresponds to a lattice-adjusted contraction between 0-15%. The contraction size rule is a geometric argument based upon the contraction of the atoms forming the intermetallic structure and appears to be an important relationship in describing ranges of homogeneity in Laves phases. The relationships developed are applied to interpret potential defect mechanisms and alloying behavior in binary and ternary Laves phases. In addition, extended ternary solubility ranges normal to a pseudobinary direction can be predicted with suitable solute additions having a metallic diameter between that of the A and B atoms. C1 UNIV WISCONSIN, DEPT MAT SCI & ENGN, MADISON, WI 53706 USA. RP THOMA, DJ (reprint author), LOS ALAMOS NATL LAB, DIV MAT SCI & TECHNOL, LOS ALAMOS, NM 87545 USA. NR 38 TC 83 Z9 87 U1 1 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD JUL 1 PY 1995 VL 224 IS 2 BP 330 EP 341 DI 10.1016/0925-8388(95)01557-4 PG 12 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA RJ675 UT WOS:A1995RJ67500031 ER PT J AU VANDEVOORT, CA OVERSTREET, JW AF VANDEVOORT, CA OVERSTREET, JW TI EFFECTS OF GLUCOSE AND OTHER ENERGY SUBSTRATES ON THE HYPERACTIVATED MOTILITY OF MACAQUE SPERM AND THE ZONA-PELLUCIDA-INDUCED ACROSOME REACTION SO JOURNAL OF ANDROLOGY LA English DT Article DE MACACA FASCICULARIS; SEMEN; HYPERACTIVATION; ACROSOME REACTION; LACTATE; PYRUVATE ID HUMAN-SPERMATOZOA; CAPACITATION; INVITRO; FERTILIZATION; PENETRATION; CYNOMOLGUS; CALCIUM AB Energy sources in sperm capacitation media have various effects on mammalian sperm and are required for stimulation of hyperactivated motility and/or acrosome reactions in some species. The present experiments were performed to investigate the energy substrate requirement for these two functions of macaque sperm. Semen from six cynomolgus macaques was washed through 60% Percoll, resuspended, and washed with Biggers, Whitten, and Whittingham media. In one set of experiments, sperm were incubated in the complete capacitation medium or in medium without glucose. In another set of experiments, the complete medium was used for comparison with medium containing no energy substrates. The absence of glucose did not affect survival of sperm during a 6-hour incubation period; however, removal of all energy substrates resulted in a decrease in percent motility by 3 hours. Sperm were incubated for 1 hour prior to evaluation of sperm motility by computer-aided sperm analysis and sperm-zona binding experiments. During the last 30 minutes of incubation, half of the aliquots of sperm suspensions were treated with activators (ACT; caffeine and dbcAMP, 1 mM each). As previously reported, when sperm were incubated in complete medium and treated with ACT there were changes in sperm movements that are consistent with hyperactivation. Similar or greater changes were observed in sperm that were incubated prior to treatment with ACT in glucose-free medium or in medium without any energy substrates. Whether sperm were incubated in complex medium or in glucose-free medium, sperm binding to zonae was enhanced when the sperm were treated with ACT. The absence of glucose in the incubation medium had no deleterious effect on the zona-induced acrosome reaction, which could be demonstrated whether or not sperm were treated with ACT. Sperm incubated in medium without energy substrates were also capable of binding to the zona pellucida and of undergoing the acrosome reaction following treatment with ACT. However, the percentage of acrosome-reacted sperm on the zonae was significantly lower when sperm were incubated in medium without any substrates. These results indicate that macaque sperm, like human sperm, do not require energy substrates in incubation media in order to undergo capacitation in vitro, although energy substrates may be necessary for optimal capacitation. C1 UNIV CALIF DAVIS, SCH MED, DEPT OBSTET & GYNECOL, DIV REPROD BIOL & MED, DAVIS, CA 95616 USA. RP LAWRENCE LIVERMORE NATL LAB, CALIF REG PRIMATE RES CTR, DAVIS, CA 95616 USA. FU NCRR NIH HHS [P51-RR 00169]; NICHD NIH HHS [U54-HD29125] NR 31 TC 17 Z9 21 U1 0 U2 0 PU AMER SOC ANDROLOGY, INC PI LAWRENCE PA C/O ALLEN PRESS, INC PO BOX 368, LAWRENCE, KS 66044 USA SN 0196-3635 EI 1939-4640 J9 J ANDROL JI J. Androl. PD JUL-AUG PY 1995 VL 16 IS 4 BP 327 EP 333 PG 7 WC Andrology SC Endocrinology & Metabolism GA RQ833 UT WOS:A1995RQ83300006 PM 8537250 ER PT J AU TURKOT, BA FORBES, DV ROBERTSON, IM COLEMAN, JJ REHN, LE KIRK, MA BALDO, PM AF TURKOT, BA FORBES, DV ROBERTSON, IM COLEMAN, JJ REHN, LE KIRK, MA BALDO, PM TI ION-IMPLANTATION DAMAGE IN AL0.6GA0.4AS/GAAS HETEROSTRUCTURES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GAAS; AMORPHIZATION; CRYSTALLINE; BEHAVIOR; ALAS C1 UNIV ILLINOIS, DEPT MAT SCI & ENGN, URBANA, IL 61801 USA. ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. RP UNIV ILLINOIS, MAT RES LAB, URBANA, IL 61801 USA. RI Coleman, James/C-9703-2011 NR 18 TC 15 Z9 15 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD JUL 1 PY 1995 VL 78 IS 1 BP 97 EP 103 DI 10.1063/1.360586 PG 7 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200013 ER PT J AU WANG, YR BOERCKER, DB AF WANG, YR BOERCKER, DB TI EFFECTIVE INTERATOMIC POTENTIAL FOR BODY-CENTERED-CUBIC METALS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID EMBEDDED-ATOM-METHOD; TRANSITION-METALS; PHOTOELECTRON DIFFRACTION; FCC METALS; MODEL; SURFACES; TA(100) C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP WANG, YR (reprint author), XEROX CORP,WEBSTER RES CTR,0114-41D,WEBSTER,NY 14580, USA. NR 21 TC 24 Z9 25 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 JUL 1 PY 1995 VL 78 IS 1 BP 122 EP 126 DI 10.1063/1.360661 PG 5 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200017 ER PT J AU NELSON, AJ GABOR, AM CONTRERAS, MA TUTTLE, JR NOUFI, R SOBOL, PE ASOKAKUMAR, P LYNN, KG AF NELSON, AJ GABOR, AM CONTRERAS, MA TUTTLE, JR NOUFI, R SOBOL, PE ASOKAKUMAR, P LYNN, KG TI COMPARISON OF POLYCRYSTALLINE CU(IN,GA)SE-2 DEVICE EFFICIENCY WITH JUNCTION DEPTH AND INTERFACIAL STRUCTURE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CDS/CUINSE2 HETEROJUNCTION; CUINSE2 C1 PHYS ELECTR LABS,EDEN PRAIRIE,MN 55344. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP NELSON, AJ (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 20 TC 20 Z9 20 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 JUL 1 PY 1995 VL 78 IS 1 BP 269 EP 272 DI 10.1063/1.360669 PG 4 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200037 ER PT J AU XU, M FINNEMORE, DK BALACHANDRAN, U HALDAR, P AF XU, M FINNEMORE, DK BALACHANDRAN, U HALDAR, P TI INTERMEDIATE PHASES PRODUCED IN GROWTH OF BI2SR2CA2CU3O10+DELTA SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CU-O WIRES; TAPES; BI2SR2CACU2O8 C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439. INTERMAGNET GEN CORP,LATHAM,NY 12110. RP XU, M (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 15 TC 19 Z9 19 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 JUL 1 PY 1995 VL 78 IS 1 BP 360 EP 363 DI 10.1063/1.360610 PG 4 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200051 ER PT J AU PEURRUNG, AJ COWIN, JP TEETER, G BARLOW, SE ORLANDO, TM AF PEURRUNG, AJ COWIN, JP TEETER, G BARLOW, SE ORLANDO, TM TI SPACE-CHARGE-INDUCED ACCELERATION OF IONS EMITTED BY LASER-IRRADIATED SURFACES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID DESORPTION; ELECTRON; PHOTOCHEMISTRY; THRESHOLD; PT(111); COPPER; VACUUM; CH3BR C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 24 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD JUL 1 PY 1995 VL 78 IS 1 BP 481 EP 488 DI 10.1063/1.360631 PG 8 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200073 ER PT J AU LILL, T CALAWAY, WF PELLIN, MJ AF LILL, T CALAWAY, WF PELLIN, MJ TI CLUSTER EMISSION DURING SPUTTERING OF LIQUID GALLIUM-ALUMINUM EUTECTIC ALLOY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID KINETIC-ENERGY DISTRIBUTIONS; METAL-CLUSTERS; ATOMS; IONIZATION; PHASE C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP LILL, T (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Pellin, Michael/B-5897-2008 OI Pellin, Michael/0000-0002-8149-9768 NR 25 TC 6 Z9 6 U1 0 U2 6 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 JUL 1 PY 1995 VL 78 IS 1 BP 505 EP 509 DI 10.1063/1.360633 PG 5 WC Physics, Applied SC Physics GA RE582 UT WOS:A1995RE58200076 ER PT J AU KUMARESAN, KR SPRINGHORN, SS LACKS, SA AF KUMARESAN, KR SPRINGHORN, SS LACKS, SA TI LETHAL AND MUTAGENIC ACTIONS OF N-METHYL-N'-NITRO-N-NITROSOGUANIDINE POTENTIATED BY OXIDIZED GLUTATHIONE, A SEEMINGLY HARMLESS SUBSTANCE IN THE CELLULAR ENVIRONMENT SO JOURNAL OF BACTERIOLOGY LA English DT Article ID CHINESE-HAMSTER CELLS; DNA MISMATCH REPAIR; STREPTOCOCCUS-PNEUMONIAE; ESCHERICHIA-COLI; DEOXYRIBONUCLEIC-ACID; DIPLOCOCCUS-PNEUMONIAE; GENETIC TRANSFORMATION; SALMONELLA-TYPHIMURIUM; MEMBRANE VESICLES; HEXA GENE AB Both the lethal and the mutagenic actions of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) on cells of Streptococcus pneumoniae were greatly potentiated by a component of yeast extract added to the cellular environment, This component was found to be an oxidation product of glutathione, glutathione disulfide (GSSG), At low concentrations in the medium, both GSSG and glutathione potentiated MNNG action, but at high concentrations, glutathione (and other sulfhydryl compounds) abolished the effect, Point mutations in a cellular gene conferred resistance to the potentiating effect, and they blocked uptake of either GSSG or glutathione into the cells as well. This gene apparently encodes a component of the system for glutathione transport in S, pneumoniae. The mechanism by which GSSG, an apparently innocuous substance in the environment, renders low levels of MNNG genotoxic and cytotoxic thus depends on its transport into the cell, where it is reduced by glutathione reductase and then activates intracellular MNNG, Also, it was observed that mutants of S. pneumoniae defective in DNA mismatch repair are more resistant to MNNG than are wild-type cells by a factor of 2.5. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. FU NIAID NIH HHS [AI14885] NR 33 TC 23 Z9 24 U1 1 U2 5 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0021-9193 J9 J BACTERIOL JI J. Bacteriol. PD JUL PY 1995 VL 177 IS 13 BP 3641 EP 3646 PG 6 WC Microbiology SC Microbiology GA RF553 UT WOS:A1995RF55300003 PM 7601826 ER PT J AU CLARKE, DB BELL, AT AF CLARKE, DB BELL, AT TI AN INFRARED STUDY OF METHANOL SYNTHESIS FROM CO2 ON CLEAN AND POTASSIUM-PROMOTED CU/SIO2 SO JOURNAL OF CATALYSIS LA English DT Article ID GAS SHIFT REACTION; SUPPORTED COPPER-CATALYSTS; ELECTRON-ENERGY LOSS; CARBON-MONOXIDE; METHYL FORMATE; FORMIC-ACID; CU-ZNO; ALCOHOL SYNTHESIS; CU(110) SURFACES; CU/ZNO CATALYST AB Infrared spectroscopy and temperature-programmed reaction (TPR) spectroscopy were used to study hydrogenation of CO2 and CO2/CO mixtures over Cu/SiO2 and potassium-promoted Cu/SiO2 catalysts. Isothermal and temperature-programmed reactions were conducted at temperatures between 303 and 563 K and pressures of 0.1 and 0.72 MPa. The only products observed during the reaction of H-2 and CO2 are CO, H2O, and CH3OH. At 0.1 MPa over Cu/SiO2, only 1% of the CO2 reacts to form methanol, the balance forming CO via the reverse water-gas shift (RWGS) reaction. Increasing the total pressure to 0.72 MPa and adding CO to the feed (CO/CO2 = 1) improve the methanol selectivity to 26%. Apparent activation energies measured at 480 K during H-2/CO2/ Ar reaction at 0.72 MPa are 21.1 kcal/mol for methanol synthesis and 15.2 kcal/mol for the RWGS reaction. Substitution of CO for Ar in the feed does not affect the apparent activation barrier for RWGS but lowers that for methanol synthesis to 16.9 kcal/mol. Infrared spectra reveal the following species on the Cu surface during CO2 hydrogenation: bidentate formate, monodentate formate, H2O, CO, and two forms of carbonate. Small concentrations of methanol and methoxy species are also observed. Addition of CO to the H-2/CO2 feed increases both bidentate formate coverage and methanol synthesis TOF by 40%. Potassium promotion of Cu/SiO2 accelerates the RWGS reaction but hinders methanol synthesis, reducing methanol selectivity to 1% at 0.72 MPa during the reaction of H-2 and CO2. Infrared observations show that potassium promotion stabilizes formate and carboxylate species. Based on the species observed during TPR-IR experiments and previous insights from methanol decomposition studies, a mechanism is proposed for CO2 hydrogenation over Cu. The effects of CO addition to the feed and potassium promotion of Cu can be explained by the proposed scheme. (C) 1995 Academic Press, Inc. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP CLARKE, DB (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. OI Bell, Alexis/0000-0002-5738-4645 NR 82 TC 82 Z9 84 U1 1 U2 32 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD JUL PY 1995 VL 154 IS 2 BP 314 EP 328 DI 10.1006/jcat.1995.1173 PG 15 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA RG041 UT WOS:A1995RG04100016 ER PT J AU KUHN, M RODRIGUEZ, JA AF KUHN, M RODRIGUEZ, JA TI THE INTERACTION OF SULFUR WITH AG/PT(111) SURFACES - SILVER-PROMOTED SULFIDATION OF PLATINUM SO JOURNAL OF CATALYSIS LA English DT Article ID SINGLE-CRYSTAL SURFACES; PT(111) SURFACES; ADSORPTION; GROWTH; FILMS; LEED; AG; CHEMISORPTION; REACTIVITY; CATALYSIS AB The coadsorption of sulfur and silver on Pt(111) has been examined using thermal desorption mass spectroscopy (TDS), X-ray photoelectron spectroscopy (XPS), and X-ray excited Auger electron spectroscopy (XAES). The results of XPS and XAES indicate that at temperatures between 300 and 700 K, S-2 gas reacts with Pt(111) producing a chemisorbed layer of sulfur without forming bulk-like platinum sulfides. The sulfidation of platinum occurs after vapor depositing Ag on S/Pt(111) surfaces, or after exposing Ag/Pt(111) surfaces to S-2 gas. At temperatures from 400 to 700 K, the reaction of S-2 gas with Ag/Pt(111) surfaces produces silver sulfides that catalyze the sulfidation of platinum by providing surface sites for the dissociation of S-2, and by favoring the diffusion of S into the bulk of the Pt substrate. The silver and platinum sulfides in the S/Ag/Pt(111) systems decompose at temperatures between 750 and 850 K, with S-2 and S evolving into gas phase and metallic Ag remaining on top of a Pt(111) substrate partially covered by chemisorbed S. At submonolayer coverages of Ag and S on Pt(111), theta(Ag) + theta(s) < 1 ML, the presence of sulfur significantly weakens the strength of the PT <----> Ag interactions, and the desorption temperature of Ag is similar to 90 K smaller than on clean Pt(111). The TDS results indicate that a S adatom reduces the ability for bimetallic bonding of several (3-4) platinum surface atoms. (C) 1995 Academic Press, Inc. C1 BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. NR 44 TC 22 Z9 22 U1 0 U2 10 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9517 EI 1090-2694 J9 J CATAL JI J. Catal. PD JUL PY 1995 VL 154 IS 2 BP 355 EP 363 DI 10.1006/jcat.1995.1177 PG 9 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA RG041 UT WOS:A1995RG04100020 ER PT J AU SHARPE, J MACARTHUR, D LIU, M KOLLIE, T GRAVES, R HENDRIKS, R AF SHARPE, J MACARTHUR, D LIU, M KOLLIE, T GRAVES, R HENDRIKS, R TI EVALUATION OF HFC 245CA AND HFC 236EA AS FOAM BLOWING AGENTS SO JOURNAL OF CELLULAR PLASTICS LA English DT Article AB Hydrochlorofluorocarbons (HCFCs) have been widely adopted as an interim blowing agent in methane insulations. Due to their scheduled phase-out, research efforts are being devoted to the identification and development of alternatives with zero ozone depletion potential. Physical blowing agents identified have included hydrocarbons, fluorocarbons, hydrofluoroethers, and more predominantly, hydrofluorocarbons (HFCs). The majority of the HFC evaluations have focused on the more readily available, low boiling candidates such as HFC 134a. Higher boiling HFC candidates that could be handled at ambient conditions and use current processing equipment would be more desirable. This paper will describe results from a research program of two such candidate HFCs performed as a cooperative effort between the Environmental Protection Agency, Oak Ridge National Laboratory and Martin Marietta Manned Space Systems. The purpose of this effort was to perform a limited evaluation of the developmental HFCs 245ca and 236ea as blowing agents in methane based insulations. These two materials were selected from screening tests of 37 C-2, C-3 and C-4 isomers based on physical properties, atmospheric lifetime, flammability, estimated toxicity, difficulty of synthesis, suitability for dual use as a refrigerant and other factors. Solubility of the two materials in typical foam components was tested, pour foaming trials were performed and preliminary data were gathered regarding foam insulation performance. C1 MARTIN MARIETTA MANNED SPACE SYST,NEW ORLEANS,LA. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN. US EPA,AIR & ENERGY ENGN RES LAB,RES TRIANGLE PK,NC 27711. RP SHARPE, J (reprint author), MARTIN MARIETTA MANNED SPACE SYST,POB 9008,MARSHALL SPACE FLIGHT CTR,AL 35812, USA. NR 4 TC 4 Z9 4 U1 0 U2 2 PU TECHNOMIC PUBL CO INC PI LANCASTER PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604 SN 0021-955X J9 J CELL PLAST JI J. Cell. Plast. PD JUL-AUG PY 1995 VL 31 IS 4 BP 313 EP 329 PG 17 WC Chemistry, Applied; Polymer Science SC Chemistry; Polymer Science GA RF531 UT WOS:A1995RF53100001 ER PT J AU KYSER, EA MANLEY, DB AF KYSER, EA MANLEY, DB TI PRECISION TOTAL PRESSURE MEASUREMENTS OF PROPYNE WITH PROPANE, PROPENE, AND PROPADIENE SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article; Proceedings Paper CT American-Institute-of-Chemical-Engineers 1994 Annual Meeting CY NOV 13-18, 1994 CL SAN FRANCISCO, CA SP Amer Inst Chem Engineers ID EQUILIBRIA AB Experimental total pressure measurements of propyne mixed with propane, propene, and propadiene are presented for five isotherms from 253 to 353 K. Thermodynamically consistent vapor compositions and saturated phase densities are calculated using a cubic equation of state with three isothermal pure component parameters and two binary mixture parameters. The precision vapor-liquid equilibrium cell and experimental procedure which are particularly useful for measurements involving close boiling light hydrocarbons are described, and the experimental and modeled results are presented. C1 UNIV MISSOURI,DEPT CHEM ENGN,ROLLA,MO 65401. RP KYSER, EA (reprint author), WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,POB 616,AIKEN,SC 29802, USA. NR 15 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD JUL-AUG PY 1995 VL 40 IS 4 BP 756 EP 764 DI 10.1021/je00020a007 PG 9 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA RJ942 UT WOS:A1995RJ94200008 ER PT J AU GUPTA, RB PRAUSNITZ, JM AF GUPTA, RB PRAUSNITZ, JM TI VAPOR-LIQUID-EQUILIBRIA OF COPOLYMER PLUS SOLVENT AND HOMOPOLYMER PLUS SOLVENT BINARIES - NEW EXPERIMENTAL-DATA AND THEIR CORRELATION SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article; Proceedings Paper CT American-Institute-of-Chemical-Engineers 1994 Annual Meeting CY NOV 13-18, 1994 CL SAN FRANCISCO, CA SP Amer Inst Chem Engineers ID SYSTEMS; PHASE; SOLUBILITIES; SEPARATION; PREDICTION; AIR AB Sixty-four isothermal data sets for vapor-liquid equilibria (VLE) for polymer + solvent binaries have been obtained using a gravimetric sorption technique, in the range 23,5-80 degrees C. Solvents studied were acetone, acetonitrile, 1-butanol, 1,2-dichloroethane, chloroform, cyclohexane, hexane, methanol, octane, pentane, and toluene. Copolymers studied were poly(acrylonitrile-co-butadiene), poly(styrene-co-acrylonitrile), poly(styrene-co-butadiene), poly(styrene-co-butyl methacrylate), poly(vinyl acetate-co-ethylene), and poly(vinyl acetate-co-vinyl chloride). All copolymers were random copolymers. Some homopolymers were also studied: polyacrylonitrile, polybutadiene, poly(butyl methacrylate), poly(ethylene oxide), polystyrene, and poly(vinyl acetate). The composition of the copolymer may have a surprising effect on VLE. Normally, deviation from ideal behavior lies between those of the constituent homopolymers, according to the copolymer composition, as observed for cyclohexane + poly(ethylene-co-vinyl acetate) and chloroform + poly(styrene-co-butyl methacrylate). However, the strong nonideal behavior observed for systems containing hydrocarbons and poly(butadiene-co-acrylonitrile) shows that the effect of acrylonitrile is in excess of that expected from the copolymer composition. The perturbed hard-sphere chain (PHSC) equation of state was used to represent VLE of the copolymer solutions studied here. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 28 TC 45 Z9 47 U1 1 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD JUL-AUG PY 1995 VL 40 IS 4 BP 784 EP 791 DI 10.1021/je00020a011 PG 8 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA RJ942 UT WOS:A1995RJ94200012 ER PT J AU WOFFORD, WT DELLORCO, PC GLOYNA, EF AF WOFFORD, WT DELLORCO, PC GLOYNA, EF TI SOLUBILITY OF POTASSIUM HYDROXIDE AND POTASSIUM PHOSPHATE IN SUPERCRITICAL WATER SO JOURNAL OF CHEMICAL AND ENGINEERING DATA LA English DT Article ID STEAM AB The solubilities of potassium hydroxide and dibasic potassium phosphate in supercritical water solutions have been measured at temperatures from 400 to 525 degrees C and pressures from 22.1 to 32.0 MPa. The solubility of potassium hydroxide varied from 61 mg/kg at 525 degrees C and 22.1 MPa to 594 mg/kg at 450 degrees C and 30.4 MPa. The solubility of dibasic potassium phosphate varied from 2 mg/kg at 450 degrees C and 26.8 MPa to 416 mg/kg at 400 degrees C and 27.1 MPa. The solubility was found to vary directly with pressure and inversely with temperature. Results were fit to a semiempirical solvation model to yield predictive equations for solubility as a function of water density. C1 LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,LOS ALAMOS,NM 87545. RP WOFFORD, WT (reprint author), UNIV TEXAS,DEPT CIVIL ENGN,AUSTIN,TX 78712, USA. NR 15 TC 42 Z9 43 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0021-9568 J9 J CHEM ENG DATA JI J. Chem. Eng. Data PD JUL-AUG PY 1995 VL 40 IS 4 BP 968 EP 973 DI 10.1021/je00020a052 PG 6 WC Thermodynamics; Chemistry, Multidisciplinary; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA RJ942 UT WOS:A1995RJ94200053 ER PT J AU RAMSHAW, JD AF RAMSHAW, JD TI FUGACITY AND ACTIVITY IN A NUTSHELL SO JOURNAL OF CHEMICAL EDUCATION LA English DT Article RP RAMSHAW, JD (reprint author), IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 1 TC 3 Z9 3 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0021-9584 J9 J CHEM EDUC JI J. Chem. Educ. PD JUL PY 1995 VL 72 IS 7 BP 601 EP 603 PG 3 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA RL956 UT WOS:A1995RL95600009 ER PT J AU LENHARD, RJ OOSTROM, M SIMMONS, CS WHITE, MD AF LENHARD, RJ OOSTROM, M SIMMONS, CS WHITE, MD TI INVESTIGATION OF DENSITY-DEPENDENT GAS ADVECTION OF TRICHLOROETHYLENE - EXPERIMENT AND A MODEL VALIDATION EXERCISE SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article ID VOLATILE ORGANIC-COMPOUNDS; GOVERNING MULTIPHASE FLOW; UNSATURATED ZONE; GROUNDWATER CONTAMINATION; COMPOSITIONAL SIMULATION; DISPERSIVE TRANSPORT; POROUS-MEDIA; VAPORS AB An experiment was conducted to evaluate whether vapor-density effects are significant in transporting volatile organic compounds (VOC's) with high vapor pressure and molecular mass through the subsurface. Trichloroethylene (TCE) was chosen far the investigation because it is a common VOC contaminant with high vapor pressure and molecular mass. For the investigation, a 2-m-long by 1-m-high by 7.5-cm-thick flow cell was constructed with a network of sampling ports. The flow cell was packed with sand, and a water table was established near the lower boundary. Liquid TCE was placed near the upper boundary of the flow cell in a chamber from which vapors could enter and migrate through the sand. TCE concentrations in the gas phase were measured by extracting 25-mu l gas samples with an air-tight syringe and analyzing them with a gas chromatograph. The evolution of the TCE gas plume in the sand was investigated by examining plots of TCE concentrations over the domain for specific times and for particular locations as a function of time. To help in this analysis, a numerical model was developed that can predict the simultaneous movements of a gas, a nonaqueous liquid and water in porous media. The model also considers interphase mass transfer by employing the phase equilibrium assumption. The model was tested with one- and two-dimensional analytical solutions of fluid flow before it was used to simulate the experiment. Comparisons between experimental data and simulation results when vapor-density effects are considered were very good. When vapor-density effects were ignored, agreement was poor. These analyses suggest that vapor-density effects should be considered and that density-driven vapor advection may be an important mechanism for moving VOC's with high vapor pressures and molecular mass through the subsurface. RP LENHARD, RJ (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 30 TC 38 Z9 38 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD JUL PY 1995 VL 19 IS 1 BP 47 EP 67 DI 10.1016/0169-7722(94)00055-M PG 21 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA RF717 UT WOS:A1995RF71700003 ER PT J AU FOLLSTAEDT, DM BIEFELD, RM KURTZ, SR BAUCOM, KC AF FOLLSTAEDT, DM BIEFELD, RM KURTZ, SR BAUCOM, KC TI MICROSTRUCTURES OF INAS1-XSBX (X=0.07-0.14) ALLOYS AND STRAINED-LAYER SUPERLATTICES SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE CUPT ORDERING; INASSB ALLOYS; STRAINED-LAYER SUPERLATTICES AB Growth of InAs1-xSbx alloys by metalorganic chemical vapor deposition at 475 degrees C results in CuPt ordering even at Sb concentrations as low as x = 0.07-0.14. The two ({111}(B) variants are present, but each exists separately in 1-2 mu m regions. However, the ordering is incomplete: it occurs in platelet domains lying on habit planes tilted 30 degrees from (001) within a disordered matrix and is not continuous at the atomic scale within the domains. This ordering apparently explains the reduction in infrared emission energies relative to the bandgaps of bulk alloys. Similar ordering is found in an InAs0.91Sb0.09/In0.87Ga0.13As strained-layer superlattice with lower-than-expected emission energy. High-resolution images indicate that the superlattice layers flat and regularly spaced. Infrared LEDs have been made from such superlattices. RP FOLLSTAEDT, DM (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 21 TC 21 Z9 21 U1 1 U2 5 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD JUL PY 1995 VL 24 IS 7 BP 819 EP 825 DI 10.1007/BF02653330 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA RG922 UT WOS:A1995RG92200004 ER PT J AU ZHU, JG ALJASSIM, MM HUFFMAN, M AF ZHU, JG ALJASSIM, MM HUFFMAN, M TI MICROSTRUCTURE AND DOMAIN CONFIGURATIONS IN FERROELECTRIC PBTIO3 AND PB(ZR,TI)O-3 THIN-FILMS SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article DE DOMAIN CONFIGURATIONS; FERROELECTRIC PBTIO3; PB(ZR,TI)O-3; THIN FILMS ID LEAD ZIRCONATE-TITANATE; RATIO AB Ferroelectric domain configurations in PbTiO3 and Pb(ZrxTi1-x)O-3 (PZT, x = 0.3 or 0.5) thin films have been studied by transmission electron microscopy. The PbTiO3 and PZT thin films have been deposited by the ionized cluster beam technique and radio frequency sputtering, respectively. The grain size in these thin films is typically less than 0.5 mu m. Lamellar 90 degrees-domain features have been observed in both PbTiO3 and PZT (30/70) samples. The domain walls correspond to the {011} twin boundaries. La-doping and Ca-modification are shown to affect the microstructure of the PZT films. No clear domain feature occurs in the PZT thin film that has composition near the morphotropic phase boundary. The effects of grain sizes are briefly discussed. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. SYMETRIX CORP,COLORADO SPRINGS,CO 80918. NR 13 TC 5 Z9 5 U1 1 U2 5 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0361-5235 J9 J ELECTRON MATER JI J. Electron. Mater. PD JUL PY 1995 VL 24 IS 7 BP 885 EP 891 DI 10.1007/BF02653337 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA RG922 UT WOS:A1995RG92200011 ER PT J AU JASELSKIS, EJ ANDERSON, MS DSILVA, AP BALDWIN, DP ZAMZOW, DS AF JASELSKIS, EJ ANDERSON, MS DSILVA, AP BALDWIN, DP ZAMZOW, DS TI IN-SITU CHARACTERIZATION TECHNIQUE FOR SCREENING CONTAMINATED SOILS SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article AB An innovative field sampling system for screening contaminated soils has been developed using laser ablation coupled with inductively coupled plasma-atomic emission spectrometry (LA-ICP-AES) technology. This sampling approach provides in-situ real-time analysis of trace inorganic elements and is conducted through a mobile testing facility that consists of an instrumentation vehicle called the Mobile Demonstration Laboratory for Environmental Screening Technologies (MDLEST) and an attached trailer Failed the Robotic Sampling Accessory (RSA). The RSA provides automated sampling capabilities through an attached three-degree-of-freedom robot that is equipped with a surface-sampling probe. The MDLEST-RSA was successfully tested at a Department of Energy (DOE) site in Fernald, Ohio, during the fall of 1992. This paper provides a description of the analysis technique, the MDLEST and RSA, and results of the field demonstration. In addition, benefits, limitations, and future plans are also discussed. C1 AMES LAB,TECHNOL INTEGRAT PROGRAM,AMES,IA. RP JASELSKIS, EJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CIVIL & CONSTRUCT ENGN,TOWN ENGN BLDG,ROOM 450,AMES,IA 50011, USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD JUL PY 1995 VL 121 IS 7 BP 521 EP 526 DI 10.1061/(ASCE)0733-9372(1995)121:7(521) PG 6 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA RD336 UT WOS:A1995RD33600006 ER PT J AU GOYETTE, ML LEWIS, BAG AF GOYETTE, ML LEWIS, BAG TI K-D IN SCREENING-LEVEL GROUNDWATER CONTAMINANT-TRANSPORT MODEL SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article ID SORPTION AB This paper describes the use of system-specific and literature values for the distribution coefficient (K-d) in a screening-level ground-water contaminant-transport model. A comparison of observed contaminant transport (Cd2+) in a laboratory soil column with predicted contaminant transport using a computer model is described and discussed. The results indicate that measured K-d values and K-d values taken from the literature can provide useful approximations of the sorption of inorganic ions in screening-level ground-water contaminant-transport models if experimental conditions (especially pH and electrolyte composition) and soil type are similar to those being modeled. C1 NORTHWESTERN UNIV,DEPT CIVIL ENGN,EVANSTON,IL 60208. RP GOYETTE, ML (reprint author), ARGONNE NATL LAB,DIV ENVIRONM ASSESSMENT,ARGONNE,IL 60439, USA. RI Lewis, Barbara-Ann/B-7027-2009 NR 12 TC 3 Z9 3 U1 0 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD JUL PY 1995 VL 121 IS 7 BP 537 EP 541 DI 10.1061/(ASCE)0733-9372(1995)121:7(537) PG 5 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA RD336 UT WOS:A1995RD33600008 ER PT J AU SCHILLING, CH BINER, SB GOEL, H JANE, J AF SCHILLING, CH BINER, SB GOEL, H JANE, J TI PLASTIC SHAPING OF AQUEOUS ALUMINA SUSPENSIONS WITH SUCROSE AND MALTODEXTRIN ADDITIVES SO JOURNAL OF ENVIRONMENTAL POLYMER DEGRADATION LA English DT Article DE CERAMIC; PLASTICITY; MALTODEXTRIN; SUCROSE; ALUMINA AB Traditional methods for the shape-forming of engineering ceramics entail plastic deformation of powder slurries containing hazardous organic liquids as suspending media. Replacing these organic with aqueous media requires the development of environmentally benign, water-soluble additives which serve as plasticizers and binders. Fundamental studies were performed with aqueous suspensions of colloidal alpha-Al2O3 to evaluate the role of sucrose and maltodextrin on viscosity, sedimentation, and filtration characteristics, plastic flow behavior of filter cakes, and sinterability. Maltodextrin systems exhibited superior results, including filtration to high packing densities and clay-like plasticity with minimal cracking. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,CTR CROPS UTILIZAT RES,DEPT FOOD SCI & HUMAN NUTR,AMES,IA 50011. RP SCHILLING, CH (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,3161 GILMAN HALL,AMES,IA 50011, USA. NR 14 TC 23 Z9 23 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 1064-7546 J9 J ENVIRON POLYM DEGR JI J. Environ. Polym. Degrad. PD JUL PY 1995 VL 3 IS 3 BP 153 EP 160 DI 10.1007/BF02068466 PG 8 WC Engineering, Environmental; Polymer Science SC Engineering; Polymer Science GA RU657 UT WOS:A1995RU65700004 ER PT J AU KOONER, ZS JARDINE, PM FELDMAN, S AF KOONER, ZS JARDINE, PM FELDMAN, S TI COMPETITIVE SURFACE COMPLEXATION REACTIONS OF SULFATE AND NATURAL ORGANIC-CARBON ON SOIL SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article ID ACID FOREST SOILS; UNSATURATED TRANSPORT PROCESSES; HETEROGENEOUS POROUS-MEDIA; ANION ADSORPTION; IRON; SORPTION; PH; CONCRETE; GOETHITE; KINETICS AB The ecological implications of subsurface SO42- loading on nutrient cation leaching, acidification, and the destruction of concrete containers used to store low-level radioactive waste, has been thoroughly addressed. Processes favoring SO42- adsorption by the subsurface matrix tend to alleviate these adverse ecological conditions and this has been investigated to a lesser extent. In this study, the adsorption of SO42- onto several soil types with indigenous SO42- and organic carbon removed, was measured as a function of pH in the presence and absence of added natural organic matter (NOM). Sulfate adsorption was strongly pH dependent and the presence of >2 mg L(-1) NOM resulted in a consistent decrease in sulfate adsorption over the pH range 4.5 to 8. The tendency of these soils to adsorb SO42- was related to their large quantity of Fe-oxides and the presence of kaolinite in the <2-mu m clay fraction. A surface complexation model based on electrical double layer theory was used to model the adsorption behavior of sulfate. A single reaction involving the adsorption of SO42- onto positive or neutral surface sites (XOH + H+ + SO42- = XSO(4)(-) + H2O) as an inner-sphere complex proved successful in describing the adsorption of sulfate under the experimental conditions. The estimated value of the intrinsic equilibrium constant (K) for the above reaction was of the order 10(10) suggesting strong sulfate adsorption. Estimated K values were found to be unaffected by the presence of added NOM. The spatial consistency and lack of NOM effects on tbe intrinsic equilibrium constants for SO42- adsorption is convenient for nutrient and contaminant transport modeling at the field-scale. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. VIRGINIA POLYTECH INST & STATE UNIV,DEPT CROP & SOIL ENVIRONM SCI,BLACKSBURG,VA 24061. NR 57 TC 26 Z9 26 U1 2 U2 5 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JUL-AUG PY 1995 VL 24 IS 4 BP 656 EP 662 PG 7 WC Environmental Sciences SC Environmental Sciences & Ecology GA RJ934 UT WOS:A1995RJ93400014 ER PT J AU PRIOR, SA ROGERS, HH RUNION, GB KIMBALL, BA MAUNEY, JR LEWIN, KF NAGY, J HENDREY, GR AF PRIOR, SA ROGERS, HH RUNION, GB KIMBALL, BA MAUNEY, JR LEWIN, KF NAGY, J HENDREY, GR TI FREE-AIR CARBON-DIOXIDE ENRICHMENT OF COTTON - ROOT MORPHOLOGICAL-CHARACTERISTICS SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article ID PHOTOSYNTHETIC ACCLIMATION; ATMOSPHERIC CO2; WATER-USE; GROWTH; YIELD; RESISTANCE; VEGETATION; RESPONSES AB The response of plants to rising global CO2 concentration is of critical research interest but one neglected aspect is its effect on roots. Root morphological changes in cotton [Gossypium hirsutum (L.) 'Delta Pine 77'] were examined in a 2-yr held study. The test crop was grown under two water regimes (wet, 100% of evapotranspiration [ET] replaced and dry, 75% [1990] and 67% [1991] of ET replaced) and two atmospheric CO2 concentrations (ambient = 370 mu mol mol(-1) and free-air CO2 enrichment [FACE] = 550 pmol mol(-1)). A FACE technique that allows for CO2 exposure under held conditions with minimal alteration of plant microclimate was used. Excavated root systems were partitioned into taproot and lateral roots at two growth phases (vegetative and reproductive). Vertical root-pulling resistance was determined at the second sampling; this measure was higher because of CO2 enrichment but was unaffected by water stress. Water stress affected root variables only at the second sampling; water stress reduced taproot variables more than lateral variables. The larger diameter taproots seen at all sample dates under FACE exhibited large increases in dry weight and volume. FACE often increased lateral root number and lateral dry weights were higher at all sample dates. The development of more robust taproot systems in CO2-enriched environments may allow for greater carbohydrate storage for utilization during periods such as hop filling and to ensure root growth for continued exploration of the soil profile to meet nutrient and water demands during peak demand periods. C1 AUBURN UNIV,SCH FORESTRY,AUBURN,AL 36849. USDA ARS,WATER CONSERVAT LAB,PHOENIX,AZ 85040. USDA ARS,WESTERN COTTON RES LAB,PHOENIX,AZ 85040. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP PRIOR, SA (reprint author), USDA ARS,NATL SOIL DYNAM LAB,POB 3439,AUBURN,AL 36831, USA. NR 32 TC 23 Z9 25 U1 0 U2 6 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JUL-AUG PY 1995 VL 24 IS 4 BP 678 EP 683 PG 6 WC Environmental Sciences SC Environmental Sciences & Ecology GA RJ934 UT WOS:A1995RJ93400017 ER PT J AU ALTMAN, SJ PARIZEK, RR AF ALTMAN, SJ PARIZEK, RR TI DILUTION OF NONPOINT-SOURCE NITRATE IN GROUNDWATER SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article ID RIPARIAN FOREST; AGRICULTURAL WATERSHEDS; COASTAL-PLAIN; DENITRIFICATION; DYNAMICS AB Nonpoint-source pollution from agriculture can cause the degradation of groundwater and surface water. Some studies conducted in Coastal Plain aquifers have shown NO3- removal from groundwater due to assimilation by vegetation or dentification before discharge to a stream is significant; relatively few have been conducted on other physiographic and geological regions within the Chesapeake Bay watershed. This study was conducted at the boundary of the Valley and Ridge and Appalachian Plateau physiographic provinces to understand how the hydrological and geochemical conditions in this region effect the transport and removal of NO3-. The groundwater dow system at the farm studied, located at the base of a valley, is influenced by one groundwater flow component parallel to the axis of the valley and a second flowing perpendicular to the axis having been recharged from topographic highs along the sides of the valley. The axis-perpendicular component is transporting NO3- and Cl- applied as fertilizers and manure on an upgradient held and also Cl- from salting of an adjacent road to the study site. The relatively nutrient-free water from the axis-parallel component dilutes NO3- and Cl- concentrations at the site from seasonal averages of 11 mg N/L and 90 mg CI/L to levels <0.4 mg N/L and 1 mg CI/L, respectively. Some evidence exists for NO3- removal from groundwater <3 m belowground; however, it is difficult to confirm the removal process with dilution dominating the system. C1 PENN STATE UNIV,DEPT GEOSCI,UNIVERSITY PK,PA 16802. RP ALTMAN, SJ (reprint author), SANDIA NATL LABS,DEP 6312,MS 1326,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 35 TC 75 Z9 78 U1 2 U2 13 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JUL-AUG PY 1995 VL 24 IS 4 BP 707 EP 718 PG 12 WC Environmental Sciences SC Environmental Sciences & Ecology GA RJ934 UT WOS:A1995RJ93400021 ER PT J AU TAYLOR, DL JARDINE, PM AF TAYLOR, DL JARDINE, PM TI ANALYSIS OF COBALT(II)EDTA AND COBALT(III)EDTA IN PORE-WATER BY ION CHROMATOGRAPHY SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Note ID METAL-IONS; SEPARATION; MIGRATION; PHASE; ACID; EDTA AB Monitoring and restoration activities at contaminated waste facilities throughout the USA have identified complicated mixtures of organic and inorganic contaminant in soil and groundwater. Inorganic contaminants are sometimes associated with various chelating agents (termed co-contaminants), which alter the geochemical behavior of the contaminants in subsurface environments. Until recently, the significance of the chelating agents was usually dismissed, and they were not routinely measured as part of environmental compliance programs. A method Is presented for separating and quantifying the common subsurface co-contaminant species of CoEDTA in aqueous solution, Cobalt(II)EDTA and Co(III)EDTA are separated by an ion chromatograph using a carbonate, bicarbonate eluant, and quantified in the presence of common pore-water inorganic anions using electrical conductivity and visible light detectors. The chromatograph detects Co(II)EDTA to 0.6 mu mol L(-1) with a linear range >4000 pmol L(-1). Cobalt-(III))TA is detected to 1.8 pmol L(-1) with a linear range >860 mu mol L(-1). The method has application in basic scientific research and environmental restoration activities. RP TAYLOR, DL (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 23 TC 27 Z9 27 U1 2 U2 4 PU AMER SOC AGRONOMY PI MADISON PA 677 S SEGOE RD, MADISON, WI 53711 SN 0047-2425 J9 J ENVIRON QUAL JI J. Environ. Qual. PD JUL-AUG PY 1995 VL 24 IS 4 BP 789 EP 792 PG 4 WC Environmental Sciences SC Environmental Sciences & Ecology GA RJ934 UT WOS:A1995RJ93400033 ER PT J AU GAKH, AA GAKH, EG SUMPTER, BG NOID, DW TROWBRIDGE, LD HARKINS, DA AF GAKH, AA GAKH, EG SUMPTER, BG NOID, DW TROWBRIDGE, LD HARKINS, DA TI ESTIMATION OF THE PROPERTIES OF HYDROFLUOROCARBONS BY COMPUTER NEURAL NETWORKS SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article DE HYDROFLUOROCARBONS; COMPUTER NEURAL NETWORKS ID BOILING POINTS; MODEL AB A simple computational scheme which utilizes computational neural networks was developed and used for estimating physical properties of hydrofluorocarbons. Testing of the computational method has demonstrated that thermodynamic and physical characteristics (boiling point, density, critical temperature, heat of evaporation) could be predicted with an average error of 3-5%. C1 MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE,TN 37831. RP GAKH, AA (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. RI Sumpter, Bobby/C-9459-2013 OI Sumpter, Bobby/0000-0001-6341-0355 NR 15 TC 11 Z9 11 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-1139 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD JUL PY 1995 VL 73 IS 1 BP 107 EP 111 DI 10.1016/0022-1139(94)03215-L PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA RL107 UT WOS:A1995RL10700021 ER PT J AU WINSKE, D OMIDI, N AF WINSKE, D OMIDI, N TI DIFFUSION AT THE MAGNETOPAUSE - HYBRID SIMULATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID KELVIN-HELMHOLTZ INSTABILITY; LATITUDE BOUNDARY-LAYER; DRIFT INSTABILITY; DAYSIDE MAGNETOPAUSE; TANGENTIAL DISCONTINUITIES; NONLINEAR EVOLUTION; ANOMALOUS TRANSPORT; PLASMA DEPLETION; MAGNETIC-FIELD; WAVES AB Electromagnetic wave generation and resulting cross-field diffusion of plasma are considered at a tangential discontinuity, which characterizes the magnetopause for northward interplanetary magnetic field. Two-dimensional hybrid (particle ions, massless fluid electrons) simulations, in which the tangential discontinuity is generated self-consistently via a stream-stream interaction, are used to show that wave growth occurs when the ambient magnetic field is predominantly perpendicular to the direction of the density gradient. Low-frequency (much less than ion gyrofrequency) waves, with amplitudes delta B/B less than or equal to 0.2 and anticorrelated density fluctuations delta n/n less than or equal to 0.6, are generated at the discontinuity, resulting in cross-field diffusion that is comparable to the Bohm rate. Both the fluctuation level and the lack of ion heating in the calculations are consistent with observations at the magnetopause. The magnitude of the diffusion is considered in the presence of numerical effects and in the context of the inferred diffusion rate at the magnetopause. The relation of the low-frequency waves and their consequences to faster growing, short-wavelength waves due to the lower hybrid drift instability is also addressed. The overall conclusion of this initial study is that diffusion due to low frequency waves is not likely to be a major effect at the magnetopause. C1 UNIV CALIF SAN DIEGO,DEPT ELECT & COMP ENGN,LA JOLLA,CA 92093. RP WINSKE, D (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,X-1,MAIL STOP F645,LOS ALAMOS,NM 87545, USA. NR 45 TC 25 Z9 25 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JUL 1 PY 1995 VL 100 IS A7 BP 11923 EP 11933 DI 10.1029/94JA02730 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RG737 UT WOS:A1995RG73700009 ER PT J AU OMIDI, N WINSKE, D AF OMIDI, N WINSKE, D TI STRUCTURE OF THE MAGNETOPAUSE INFERRED FROM ONE-DIMENSIONAL HYBRID SIMULATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID INTERPLANETARY MAGNETIC-FIELD; BOUNDARY-LAYER; EARTHS MAGNETOPAUSE; SUBSOLAR MAGNETOPAUSE; DAYSIDE MAGNETOPAUSE; RECONNECTION LAYERS; SLOW SHOCKS; PLASMA; MAGNETOSHEATH; MAGNETOSPHERE AB The structure of the magnetopause is investigated by studying the interaction between two plasmas with solar wind and magnetospheric properties, Both Hall-MHD and hybrid (particle ions and fluid electrons) simulations are performed to compare and contrast the nature of the solutions in the fluid and the kinetic limits, It is shown that, in accordance with previous studies, the fluid solutions consist of multiple discontinuities and waves such as slow shocks and waves, as well as contact and rotational discontinuities. In contrast, the kinetic solutions consist of fewer discontinuities and include non-MHD boundaries, The difference between the two types of solutions are attributed to the absence of contact surfaces in collisionless plasmas and the possible Landau damping of slow waves, The kinetic solutions are found to be in a much better agreement with magnetopause observations, which have shown little evidence for the presence of slow shocks or contact discontinuities. The results of kinetic calculations suggest that the presence of a small but finite normal component of the magnetic field allows for the mixing of magnetosheath and magnetospheric plasmas and may, in part, be responsible for the formation of the boundary layer even during the periods of northward interplanetary magnetic field, These results also show that the necessary changes in the fields and the plasma parameters across the magnetopause do not occur simultaneously (i.e,, in the same spatial location), As such, the magnetopause cannot be viewed as a single boundary but instead is a region which includes both abrupt and gradual changes in the fields and plasma parameters, For example, the jump from the magnetosheath to the magnetospheric magnetic field strength takes place at a narrow region (a few ion inertial lengths), which we refer to as the magnetic boundary, This boundary, which has no MHD counter part, is not associated with any abrupt change in the plasma density or temperature, Pile up of the magnetosheath mirror waves at the magnetic boundary can result in the compression and amplification of these waves, As a result, anticorrelated density and magnetic field fluctuations are present upstream of the magnetic boundary, Similar fluctuations have been observed at the magnetopause of the Earth and possibly at Jupiter and Saturn, Analysis of these waves at the Earth's magnetopause has shown that they have a finite frequency in the plasma rest frame, Here we show that this finite frequency is a direct consequence of the entry of the magnetosheath plasma into the boundary layer and may be used to determine the velocity of plasma penetration into the high magnetic field region. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM. UNIV CALIF SAN DIEGO,CALIF SPACE INST,LA JOLLA,CA 92093. RP OMIDI, N (reprint author), UNIV CALIF SAN DIEGO,DEPT ELECT & COMP ENGN,LA JOLLA,CA 92093, USA. NR 40 TC 32 Z9 32 U1 2 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JUL 1 PY 1995 VL 100 IS A7 BP 11935 EP 11955 DI 10.1029/94JA02937 PG 21 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RG737 UT WOS:A1995RG73700010 ER PT J AU THOMAS, VA AF THOMAS, VA TI KINETIC SIMULATION OF THE KELVIN-HELMHOLTZ INSTABILITY IN A FINITE-SIZED JET SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MACH NUMBER; SOLAR-WIND; SHEAR; MAGNETOPAUSE; DEPENDENCE; FLOW AB Two-dimensional hybrid simulations with particle ions and fluid electrons are used to calculate the kinetic evolution of the Kelvin-Helmholtz (K-H) instability for a jet of material moving transverse to the magnetic field in the middle of a field reversal region. The instability shows two phases. This first phase is the development of a short scale length instability on the sides of the jet, which might be characterized as a local K-H instability. This instability saturates at low amplitude by modest broadening of the jet profile. Then a nonlocal K-H instability sets in where the jet exhibits a kinklike behavior which spreads and disrupts the jet in a dramatic fashion. The simulation results are discussed within the context of possible relevance to the magnetopause. RP THOMAS, VA (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545, USA. NR 18 TC 4 Z9 4 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD JUL 1 PY 1995 VL 100 IS A7 BP 12011 EP 12016 DI 10.1029/94JA02371 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RG737 UT WOS:A1995RG73700014 ER PT J AU THOMAS, VA AF THOMAS, VA TI KINETIC KELVIN-HELMHOLTZ INSTABILITY AT A FINITE-SIZED OBJECT SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETOTAIL BARIUM RELEASES; EXPANDING PLASMA CLOUDS; VENUS IONOSPHERE; IONOPAUSE; MAGNETOPAUSE; SIMULATION; STABILITY; MANTLE; SHEET; MODES AB Two-dimensional hybrid simulations with particle ions and fluid electrons are used to calculate the kinetic evolution of the self-consistent flow around a two-dimensional obstacle with zero intrinsic magnetic field. Plasma outflow from the obstacle is used to establish a boundary layer between the incoming solar wind and the outgoing plasma. Because the self-consistent flow solution, a velocity shear is naturally set up at this interface, and since the magnetic field for these simulations is transverse to this flow, the Kelvin-Helmholtz (K-H) instability can be excited at low-velocity shear. Simulations demonstrate the existence of the instability even near the subsolar location, which normally is thought to be stable to this instability. The apparent reason for this result is the overall time dependence at the boundary layer, which gives rise to a Rayleigh-Taylor like instability which provides seed perturbations for the K-R instability. These results are directly applicable to Venus, comets, artificial plasma releases, and laser target experiments. This result has potentially important ramifications for the interpretation of observational results as well as for an estimation of the cross-field transport. The results suggest that the K-H instability may play a role in dayside processes and the Venus ionopause, and may exist within the context of more general situations, for example, the Earth's magnetopause. RP THOMAS, VA (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545, USA. NR 34 TC 4 Z9 4 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 JI J. Geophys. Res-Space Phys. PD JUL 1 PY 1995 VL 100 IS A7 BP 12017 EP 12023 DI 10.1029/94JA02372 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RG737 UT WOS:A1995RG73700015 ER PT J AU SUESS, ST MCCOMAS, DJ BAME, SJ GOLDSTEIN, BE AF SUESS, ST MCCOMAS, DJ BAME, SJ GOLDSTEIN, BE TI SOLAR-WIND EDDIES AND THE HELIOSPHERIC CURRENT SHEET SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID VELOCITY FLUCTUATIONS; OUTER HELIOSPHERE; SECTOR STRUCTURE; STREAMER BELT; VORTEX STREET; ALFVEN WAVES; ULYSSES; EVOLUTION; SYSTEM; MODEL AB Ulysses has collected data between 1 and 5 AU during, and just following solar maximum, when the heliospheric current sheet (HCS) can be thought of as reaching its maximum tilt and being subject to the maximum amount of turbulence in the solar wind. The Ulysses solar wind plasma instrument measures the vector velocity and can be used to estimate the flow speed and direction in turbulent ''eddies'' in the solar wind that are a fraction of an astronomical unit in size and last (have either a turnover or dynamical interaction time of) several hours to more than a day. Here, in a simple exercise, these solar wind eddies at the HCS are characterized using Ulysses data. This character is then used to define a model flow field with eddies that is imposed on an ideal HCS to estimate how the RCS will be deformed by the flow. This model inherently results in the complexity of the HCS increasing with heliocentric distance, but the result is a measure of the degree to which the observed change in complexity is a measure of the importance of solar wind flows in deforming the HCS. By comparison with randomly selected intervals not located on the RCS, it appears that eddies on the HCS are similar to those elsewhere at this time during the solar cycle, as is the resultant deformation of the interplanetary magnetic field (IMF). The IMF deformation is analogous to what is often termed the ''random walk'' of interplanetary magnetic field lines. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NASA, JET PROP LAB, PASADENA, CA USA. RP SUESS, ST (reprint author), NASA, GEORGE C MARSHALL SPACE FLIGHT CTR, MS ES82, HUNTSVILLE, AL 35801 USA. NR 34 TC 16 Z9 16 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD JUL 1 PY 1995 VL 100 IS A7 BP 12261 EP 12273 DI 10.1029/95JA00764 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RG737 UT WOS:A1995RG73700036 ER PT J AU CANTRELL, KJ KAPLAN, DI WIETSMA, TW AF CANTRELL, KJ KAPLAN, DI WIETSMA, TW TI ZERO-VALENT IRON FOR THE IN-SITU REMEDIATION OF SELECTED METALS IN GROUNDWATER SO JOURNAL OF HAZARDOUS MATERIALS LA English DT Article ID HYDROLYSIS; REDUCTION; CONSTANTS AB Zero-valent iron (Fe-0), metallic iron, is being evaluated as a permeable reactive barrier material to mitigate the transport of a wide array of highly mobile contaminants in groundwater. Zero-valent iron has previously been shown to destroy effectively numerous chlorinated hydrocarbon compounds via reductive dehalogenation. No references could be found regarding the ability of zero-valent iron to reduce UO22+, MoO42-, or TcO4-. A series of kinetic-batch studies was conducted to determine the capability of particulate Fe-0 to remove UO22+, MoO42-, TcO4-, and CrO42- from groundwater. Particulate Fe-0 effectively removed each of these contaminants from solution; removal rates decreased as follows: CrO42- > TcO4- > UO22+>>MoO22-. The removal mechanism appears to be reductive precipitation. Thermodynamic equilibrium calculations indicated that the rate of removal of the metals from solution increased as the difference in pe (Delta pe) increased between the redox half reaction for the redox couple of interest and the Fe-0/Fe2+ couple. Furthermore, the pe value for a redox couple provided a qualitative indication of the reduction rate by Fe-0. These results indicate that the rate of removal of CrO42-, TcO4-, and UO22+ from groundwater is rapid, permitting an inexpensive barrier of practical dimensions to be used for in situ remediation purposes. RP CANTRELL, KJ (reprint author), PACIFIC NW LAB, TRANSPORT GEOCHEM GRP, MSIN K6-81,POB 999, RICHLAND, WA 99352 USA. NR 24 TC 210 Z9 235 U1 6 U2 45 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3894 J9 J HAZARD MATER JI J. Hazard. Mater. PD JUL PY 1995 VL 42 IS 2 BP 201 EP 212 DI 10.1016/0304-3894(95)00016-N PG 12 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA RH101 UT WOS:A1995RH10100005 ER PT J AU KELLY, J ASHBURN, DA MICHALCZYK, R SILKS, LA AF KELLY, J ASHBURN, DA MICHALCZYK, R SILKS, LA TI AN IMPROVED SYNTHESIS OF [AMINO-N-15]ADENINE - USEFUL IN THE LARGE-SCALE SYNTHESIS OF 2'-DEOXY[AMINO-N-15] ADENOSINE SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS LA English DT Article DE [AMINO-N-15]ADENINE; 2'-DEOXY[AMINO-N-15]ADENOSINE ID NITROGEN-15-LABELED DEOXYNUCLEOSIDES; DEOXYADENOSINE AB 2'-Deoxy[Amino-N-15]Adenosine has been constructed in two steps from commercially available starting materials. These reactions have been scaled up to give 5 gram lots of labeled material. C1 LOS ALAMOS NATL LAB,NIH,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545. FURMAN UNIV,DEPT CHEM,GREENVILLE,SC 29208. WESLEYAN UNIV,DEPT MOLEC BIOL & BIOCHEM,MIDDLETOWN,CT 06459. NR 15 TC 7 Z9 7 U1 1 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0362-4803 J9 J LABELLED COMPD RAD JI J. Label. Compd. Radiopharm. PD JUL PY 1995 VL 36 IS 7 BP 631 EP 635 DI 10.1002/jlcr.2580360704 PG 5 WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry, Analytical SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry GA RJ431 UT WOS:A1995RJ43100003 ER PT J AU SOUERS, PC TSUGAWA, RT FEARON, EM COLLINS, GW AF SOUERS, PC TSUGAWA, RT FEARON, EM COLLINS, GW TI NMR LINESHAPES IN SOLID TRITIUM AND DEUTERIUM-TRITIUM SO JOURNAL OF LOW TEMPERATURE PHYSICS LA English DT Article ID D-T; HYDROGEN; RELAXATION; CONVERSION; PHASE AB We report on the NMR free induction decays (FID) fr om solid tritium (T-2), deuterium-trititum (D-T), and H-2 HD and D-2 containing 2% tritium. The FID in pure components is typically a beat decay for spin concentrations >30%, can exponential for spin concentrations <10%, and a Gaussian or Gaussian-exponential for spin concentrations in between. In mixtures of DT or HD, the deuteron FID is a Gaussian-exponential while the T or H FID is typically a beat decay ol Gaussian depending on temperature. The linewidth is shown to consist mostly of inter molecular and intramolecular contr ibutions, with a small component resulting from unpaired hydrogen atoms created by the tritium radioactivity. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 36 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0022-2291 J9 J LOW TEMP PHYS JI J. Low Temp. Phys. PD JUL PY 1995 VL 100 IS 1-2 BP 21 EP 43 DI 10.1007/BF00753835 PG 23 WC Physics, Applied; Physics, Condensed Matter SC Physics GA RN340 UT WOS:A1995RN34000002 ER PT J AU WOELK, K RATHKE, JW AF WOELK, K RATHKE, JW TI COMPOSITE 90-DEGREES AND 180-DEGREES PULSES TO COMPENSATE FOR RADIOFREQUENCY GRADIENTS IN TOROID NMR DETECTORS SO JOURNAL OF MAGNETIC RESONANCE SERIES A LA English DT Article ID POPULATION-INVERSION; SEQUENCES AB Two new pulse sequences, a composite 90 degrees pulse and a composite 180 degrees pulse, have been developed to compensate for the extremely large radiofrequency gradients in toroid NMR detectors. The composite 90 degrees pulse has the ability to transfer more than 98% of the equilibrium magnetization phase-correlated into the x-y plane of the rotating frame, even if the strongest B-1 held is nine times the weakest. The composite 180 degrees pulse attains 99% inversion of the equilibrium magnetization in the same B-1 gradient. Trajectory calculations that follow the fate of the magnetization during the new pulse sequences and during composite pulses reported in the literature compared favorably with results derived from NMR experiments performed within a toroid cavity probe. Also, the T-1 relaxation time of chloroform was measured by using the inversion-recovery procedure in a toroid cavity probe. When the standard pulses were substituted by the new composite pulses, the dynamic range in signal intensity was increased by a factor greater than two. (C) 1995 Academic Press, Inc. C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 14 TC 7 Z9 7 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 1064-1858 J9 J MAGN RESON SER A JI J. Magn. Reson. Ser. A PD JUL PY 1995 VL 115 IS 1 BP 106 EP 115 DI 10.1006/jmra.1995.1153 PG 10 WC Physics, Atomic, Molecular & Chemical SC Physics GA RL474 UT WOS:A1995RL47400013 ER PT J AU SONG, YQ GAEDE, HC PIETRASS, T BARRALL, GA CHINGAS, GC AYERS, MR PINES, A AF SONG, YQ GAEDE, HC PIETRASS, T BARRALL, GA CHINGAS, GC AYERS, MR PINES, A TI SPIN-POLARIZED XE-129 GAS IMAGING OF MATERIALS SO JOURNAL OF MAGNETIC RESONANCE SERIES A LA English DT Note ID POLYMER SURFACE; NMR; EXCHANGE; NUCLEI; XENON C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP SONG, YQ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Gaede, Holly/B-7392-2015 OI Gaede, Holly/0000-0003-4444-4394 NR 23 TC 49 Z9 50 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 1064-1858 J9 J MAGN RESON SER A JI J. Magn. Reson. Ser. A PD JUL PY 1995 VL 115 IS 1 BP 127 EP 130 DI 10.1006/jmra.1995.1157 PG 4 WC Physics, Atomic, Molecular & Chemical SC Physics GA RL474 UT WOS:A1995RL47400017 ER PT J AU DIKANOV, SA TYRYSHKIN, AM FELLI, I REIJERSE, EJ HUTTERMANN, J AF DIKANOV, SA TYRYSHKIN, AM FELLI, I REIJERSE, EJ HUTTERMANN, J TI C-BAND ESEEM OF STRONGLY COUPLED PEPTIDE NITROGENS IN REDUCED 2-IRON FERREDOXIN SO JOURNAL OF MAGNETIC RESONANCE SERIES B LA English DT Note ID ECHO ENVELOPE MODULATION; SULFUR CLUSTERS; FUMARATE REDUCTASE; ESCHERICHIA-COLI; N-14; SPECTRA; SPECTROSCOPY; RESONANCE; LIGANDS; GLYCINE C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. UNIV FLORENCE, DEPT CHEM, I-50121 FLORENCE, ITALY. UNIV NIJMEGEN, DEPT MOLEC SPECT, 6525 ED NIJMEGEN, NETHERLANDS. UNIV SAARLAND, FACHRICHTUNG BIOPHYS & PHYS GRUNDLAGEN MED, D-66421 HOMBURG, GERMANY. RP DIKANOV, SA (reprint author), RUSSIAN ACAD SCI, INST CHEM KINET & COMBUST, NOVOSIBIRSK 630090, RUSSIA. RI Tyryshkin, Alexei/A-5219-2008; Felli, Isabella/O-1751-2015 OI Felli, Isabella/0000-0002-6018-9090 NR 25 TC 24 Z9 24 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 1064-1866 J9 J MAGN RESON SER B JI J. Magn. Reson. Ser. B PD JUL PY 1995 VL 108 IS 1 BP 99 EP 102 DI 10.1006/jmrb.1995.1110 PG 4 WC Physics, Atomic, Molecular & Chemical SC Physics GA RM477 UT WOS:A1995RM47700015 PM 7627437 ER PT J AU SEVE, L TONNERRE, JM RAOUX, D BOBO, JF PIECUCH, M DESANTIS, M TROUSSEL, P BROT, JM CHAKARIAN, V KAO, CC CHEN, CT AF SEVE, L TONNERRE, JM RAOUX, D BOBO, JF PIECUCH, M DESANTIS, M TROUSSEL, P BROT, JM CHAKARIAN, V KAO, CC CHEN, CT TI RESONANT MAGNETIC SCATTERING IN SOFT-X-RAY RANGE USING MULTILAYERS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 14th International Colloquium on Magnetic Films and Surfaces (ICMFS)/International Symposium on Magnetic Ultrathin Films, Multilayers and Surfaces CY AUG 29-SEP 02, 1994 CL DUSSELDORF, GERMANY SP Mat Res Soc, E MRS AB X-ray resonant magnetic scattering experiments using linearly polarised light have been performed at the L(2,3) absorption edges of Co in a magnetically coupled Cu/Co multilayer. Taking advantage of the dependence of the scattering intensity on the magnetisation direction, we succeed in bringing out a purely magnetic peak due to the antiferromagnetic coupling between successive Co layers. Then for a ferromagnetically coupled multilayer, large changes in the scattering intensity of Bragg peaks of the multilayer (up to 45%) have been observed upon reversal of the direction of magnetisation in the multilayer. C1 UNIV NANCY 1,PHYS SOLIDE LAB,F-54506 VANDOEUVRE NANCY,FRANCE. UNIV PARIS 11,MESR,CEA,LURE,F-91405 ORSAY,FRANCE. CEA,CTR ETUD LIMEIL VALENTON,F-94195 VILLENEUVE ST GEO,FRANCE. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,UPTON,NY 11973. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP SEVE, L (reprint author), CNRS,CRISTALLOG LAB,BP 166,F-38042 GRENOBLE,FRANCE. NR 10 TC 16 Z9 16 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD JUL PY 1995 VL 148 IS 1-2 BP 68 EP 69 DI 10.1016/0304-8853(95)00152-2 PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA RM330 UT WOS:A1995RM33000033 ER PT J AU BLAND, JAC DABOO, C HEINRICH, B CELINSKI, Z FULLERTON, EE OUNADJELA, K STOEFFLER, D AF BLAND, JAC DABOO, C HEINRICH, B CELINSKI, Z FULLERTON, EE OUNADJELA, K STOEFFLER, D TI ENHANCED MAGNETIC-MOMENTS IN EPITAXIAL BCC FE/AG(001) FILMS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 14th International Colloquium on Magnetic Films and Surfaces (ICMFS)/International Symposium on Magnetic Ultrathin Films, Multilayers and Surfaces CY AUG 29-SEP 02, 1994 CL DUSSELDORF, GERMANY SP Mat Res Soc, E MRS ID POLARIZED NEUTRON REFLECTION; ULTRATHIN AB We report polarised neutron reflection (PNR) and ferromagnetic resonance (FMR) measurements of the value of magnetic moments in epitaxial Fe films in proximity with Ag, Au, Cu and Pd overlayers prepared by MBE on singular Ag(001) substrates. C1 SIMON FRASER UNIV,DEPT PHYS,BURNABY,BC V5A 1S6,CANADA. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV STRASBOURG 1,INST PHYS & CHIM MAT STRASBOURG GEMME,F-67070 STRASBOURG,FRANCE. RP BLAND, JAC (reprint author), UNIV CAMBRIDGE,CAVENDISH LAB,MADINGLEY RD,CAMBRIDGE CB3 0HE,ENGLAND. RI Fullerton, Eric/H-8445-2013; Stoeffler, Daniel/I-1145-2016 OI Fullerton, Eric/0000-0002-4725-9509; NR 10 TC 4 Z9 4 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD JUL PY 1995 VL 148 IS 1-2 BP 85 EP 87 DI 10.1016/0304-8853(95)00160-3 PG 3 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA RM330 UT WOS:A1995RM33000041 ER PT J AU JOHNSON, PD AF JOHNSON, PD TI SPIN-POLARIZED PHOTOEMISSION-STUDIES OF MAGNETIC QUANTUM-WELL STATES SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 14th International Colloquium on Magnetic Films and Surfaces (ICMFS)/International Symposium on Magnetic Ultrathin Films, Multilayers and Surfaces CY AUG 29-SEP 02, 1994 CL DUSSELDORF, GERMANY SP Mat Res Soc, E MRS ID SUBSTRATE; ANALYZER; LAYERS; FILMS AB Quantum well states with discrete binding energies dependent on the thickness of the film are observed in copper films deposited on a Co(001) substrate. They are found to be spin polarized, preferentially with minority spin. These states pass up to and through the Fermi level with a frequency identical to the long period of oscillation in the associated magnetic multilayers. In the 'pre-asymptotic limit' the dispersion of these states away from the center of the zone is described by enhanced effective masses. This has implications for theories of the oscillatory exchange coupling that invoke the bulk Ferni surface. RP JOHNSON, PD (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 27 TC 4 Z9 4 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD JUL PY 1995 VL 148 IS 1-2 BP 167 EP 171 DI 10.1016/0304-8853(95)00194-8 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA RM330 UT WOS:A1995RM33000075 ER PT J AU FENG, Z BROWN, IG AGER, JW AF FENG, Z BROWN, IG AGER, JW TI ELECTRON-EMISSION FROM CHEMICAL-VAPOR-DEPOSITED DIAMOND AND AMORPHOUS-CARBON FILMS OBSERVED WITH A SIMPLE FIELD-EMISSION DEVICE SO JOURNAL OF MATERIALS RESEARCH LA English DT Note AB Electron emission from chemical vapor deposited (CVD) diamond and amorphous carbon (a-C) films was observed with a simple field emission device (FED). Both diamond and a-C films were prepared with microwave plasma-enhanced CVD techniques. Electron emission in the field strength range +10 to -10 MVm(-1) was studied, and the field emission source was confirmed by a diode characteristic of the I-V curve, a straight line in the Fowler-Nordheim (F-N) plot, and direct observation of light emission from a fluorescent screen. The turn-on field strength was similar to 5 MVm(-1), which was similar for both kinds of carbon films. The highest current density for diamond films, observed at a field strength of 10 MVm(-1), was similar to 15 mu A cm(-2). Diamond films yielded a higher emission current than a-C films. The reasons for the observed field emission are discussed. RP FENG, Z (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. OI Ager, Joel/0000-0001-9334-9751 NR 13 TC 55 Z9 58 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JUL PY 1995 VL 10 IS 7 BP 1585 EP 1588 DI 10.1557/JMR.1995.1585 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA RE759 UT WOS:A1995RE75900003 ER PT J AU LIU, CL PLIMPTON, SJ AF LIU, CL PLIMPTON, SJ TI MOLECULAR-DYNAMICS SIMULATIONS OF GRAIN-BOUNDARY DIFFUSION IN AL USING EMBEDDED-ATOM METHOD POTENTIALS SO JOURNAL OF MATERIALS RESEARCH LA English DT Note ID 001 TILT BOUNDARIES; ACTIVATION-ENERGY; AU/AG SYSTEM; METALS AB Molecular dynamics (MD) simulations of diffusion in a Sigma 5(310) [001] Al tilt grain boundary were performed using for the first time three different potentials based on the embedded atom method (EAM). The EAM potentials that produce more accurate melting temperatures also yield activation energies in better agreement with experimental data. Compared to pair potentials, the EAM potentials also give more accurate results. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP LIU, CL (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37830, USA. NR 14 TC 10 Z9 10 U1 0 U2 3 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JUL PY 1995 VL 10 IS 7 BP 1589 EP 1592 DI 10.1557/JMR.1995.1589 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA RE759 UT WOS:A1995RE75900004 ER PT J AU CHAKOUMAKOS, BC AF CHAKOUMAKOS, BC TI CRYSTAL-STRUCTURE SYSTEMATICS FROM OXIDE PHASE-DIAGRAMS BY CONTOURING THEM WITH ZOLTAIS TETRAHEDRAL SHARING COEFFICIENT SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID REFINEMENT; SILICATES AB For crystal structures of oxides with tetrahedral coordination polyhedra, the average number of tetrahedra participating in the sharing of a corner, i.e., Zoltai's tetrahedral sharing coefficient, provides a measure of the degree of polymerization of the tetrahedra By contouring oxide phase diagrams with Zoltai's tetrahedral sharing coefficient, crystal structure systematics can be conveniently displayed and correlated with other physical and thermochemical properties. The advantages of this analysis are (ij a structural map guides exploration for new compounds, (ii) possible structures for existing compounds that are not known are suggested, (iii) the internal consistency of the chemistry of specific compounds is tested by structural constraints, (iv) the physical behavior and properties of a family of compounds in a chemical system can be correlated with the degree of polymerization of the tetrahedra, and (v) the analysis lends itself to computer programming, in that contour templates of tetrahedral sharing coefficients fur different types of oxide systems can be easily determined and overlaid on traditional phase diagrams. Shortcomings to this approach are that the tetrahedral sharing coefficient does not define a unique tetrahedral anion topology, ambiguities arise if some of the oxygen atoms are not part of the tetrahedral anion, and many chemical systems contain oxides where one or more of the tetrahedral cations adopt other coordination geometries. RP CHAKOUMAKOS, BC (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Chakoumakos, Bryan/A-5601-2016 OI Chakoumakos, Bryan/0000-0002-7870-6543 NR 16 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD JUL PY 1995 VL 10 IS 7 BP 1772 EP 1778 DI 10.1557/JMR.1995.1772 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA RE759 UT WOS:A1995RE75900026 ER PT J AU HOFFMAN, MJ MAI, YW DAUSKARDT, RH AGER, J RITCHIE, RO AF HOFFMAN, MJ MAI, YW DAUSKARDT, RH AGER, J RITCHIE, RO TI GRAIN-SIZE EFFECTS ON CYCLIC FATIGUE AND CRACK-GROWTH RESISTANCE BEHAVIOR OF PARTIALLY-STABILIZED ZIRCONIA SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID TRANSFORMATION-TOUGHENED CERAMICS; RAMAN-SPECTROSCOPY; PROPAGATION; ALUMINA; FRACTURE; ZONES AB Cyclic fatigue crack growth and crack-resistance behaviour was studied in partially stabilized zirconia (PSZ) with three different cubic-phase grain sizes following sub-eutectoid heat treatments. Raman spectroscopy was used to determine the extent of phase transformation around the cracks for both cyclic and monotonic roading conditions. All tests were on ''long'', through thickness cracks using compact-tension specimens. Predictions of crack-tip shielding were made following determination of toughening parameters using crack-resistance data. It was found that the dominant factors affecting cyclic fatigue-crack growth were the level of crack-tip shielding, as a result of phase transformation, and the intrinsic toughness of the material. Grain size did not appear to significantly affect fatigue crack-growth behaviour. C1 UNIV SYDNEY,CTR ADV MAT TECHNOL,DEPT MECH ENGN,SYDNEY,NSW 2006,AUSTRALIA. STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RI Ritchie, Robert/A-8066-2008; OI Ritchie, Robert/0000-0002-0501-6998; Hoffman, Mark/0000-0003-2927-1165; Ager, Joel/0000-0001-9334-9751 NR 37 TC 11 Z9 11 U1 0 U2 7 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD JUL 1 PY 1995 VL 30 IS 13 BP 3291 EP 3299 DI 10.1007/BF00349872 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA RJ361 UT WOS:A1995RJ36100001 ER PT J AU JURCO, B SCHLIEKER, M AF JURCO, B SCHLIEKER, M TI ON FOCK-SPACE REPRESENTATIONS OF QUANTIZED ENVELOPING-ALGEBRAS RELATED TO NONCOMMUTATIVE DIFFERENTIAL GEOMETRY SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article ID COMPACT MATRIX PSEUDOGROUPS; BRAIDED GROUPS; QUANTUM GROUPS; CALCULUS AB In this paper explicitly natural (from the geometrical point of view) Fock-space representations (contragradient Verma modules) of the quantized enveloping algebras are constructed. In order to do so, one starts from the Gauss decomposition of the quantum group and introduces the differential operators on the corresponding q-deformed flag manifold (assumed as a left comodule for the quantum group) by a projection to it of the right action of the quantized enveloping algebra on the quantum group. Finally, the representatives of the elements of the quantized enveloping algebra corresponding to the left-invariant vector fields on the quantum group are expressed as first-order differential operators on the q-deformed flag manifold. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP JURCO, B (reprint author), CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. NR 24 TC 4 Z9 4 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD JUL PY 1995 VL 36 IS 7 BP 3814 EP 3821 PG 8 WC Physics, Mathematical SC Physics GA RJ043 UT WOS:A1995RJ04300049 ER PT J AU COOLING, BF AF COOLING, BF TI BRASSEY ENCYCLOPEDIA OF MILITARY HISTORY AND BIOGRAPHY - MARGIOTTA,FD SO JOURNAL OF MILITARY HISTORY LA English DT Book Review RP COOLING, BF (reprint author), US DOE,WASHINGTON,DC 20585, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU VIRGINIA MILITARY INST PI LEXINGTON PA LEXINGTON, VA 24450 SN 0899-3718 J9 J MILITARY HIST JI J. Mil. Hist. PD JUL PY 1995 VL 59 IS 3 BP 521 EP 522 DI 10.2307/2944623 PG 2 WC History SC History GA RK430 UT WOS:A1995RK43000008 ER PT J AU EBERLING, JL REED, BR NORDAHL, TE BUDINGER, TF KUSUBOV, N JAGUST, WJ AF EBERLING, JL REED, BR NORDAHL, TE BUDINGER, TF KUSUBOV, N JAGUST, WJ TI REDUCED TEMPORAL-LOBE GLUCOSE-METABOLISM IN AGING SO JOURNAL OF NEUROIMAGING LA English DT Article ID CEREBRAL BLOOD-FLOW; POSITRON EMISSION TOMOGRAPHY; ALZHEIMERS-DISEASE; NEUROFIBRILLARY TANGLES; SENILE DEMENTIA; NORMAL VALUES; FLUORODEOXYGLUCOSE METHOD; HIPPOCAMPAL-FORMATION; PATHOLOGICAL-CHANGES; OXYGEN-CONSUMPTION AB The results of a positron emission tomography study of regional cerebral metabolic rates for glucose are reported for 8 healthy old subjects (mean age, 66 yr; standard deviation [SD], 5) and 9 young subjects (mean age, 27 yr; SD, 4.6) using a high-resolution positron emission tomograph and the glucose metabolic tracer F-18-fluorodeoxyglucose. Older subjects showed significantly lower cerebral metabolic rates than did the young subjects, in anterior, middle, and posterior temporal neocortex and in mesial temporal cortex, with the largest differences occurring in anterior temporal cortex (temporal pole). The current findings may reflect either decreases in regional cerebral metabolic rates for glucose that occur with normal aging, or early indications of cognitive dysfunction that is associated with age-related disorders. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. UNIV CALIF DAVIS,DEPT PSYCHIAT,DAVIS,CA 95616. UNIV CALIF DAVIS,CTR ALZHEIMERS DIS,DEPT NEUROL,DAVIS,CA 95616. RI Nordahl, Thomas/J-7643-2013 OI Nordahl, Thomas/0000-0002-8627-0356 FU NIA NIH HHS [AG10129, AG07793] NR 50 TC 20 Z9 20 U1 1 U2 1 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 1051-2284 J9 J NEUROIMAGING JI J. Neuroimaging PD JUL PY 1995 VL 5 IS 3 BP 178 EP 182 PG 5 WC Clinical Neurology; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA RJ936 UT WOS:A1995RJ93600008 PM 7626826 ER PT J AU JAGUST, WJ JOHNSON, KA HOLMAN, BL AF JAGUST, WJ JOHNSON, KA HOLMAN, BL TI SPECT PERFUSION IMAGING IN THE DIAGNOSIS OF DEMENTIA SO JOURNAL OF NEUROIMAGING LA English DT Article ID EMISSION COMPUTED-TOMOGRAPHY; CEREBRAL BLOOD-FLOW; MULTIPLE INFARCT DEMENTIA; MOTOR-NEURON DISEASE; TC-99M HM-PAO; ALZHEIMERS-DISEASE; PARKINSONS-DISEASE; CLINICAL-DIAGNOSIS; TECHNETIUM-99M-HMPAO SPECT; NEUROPATHOLOGICAL FINDINGS AB Single-photon emission computed tomography (SPECT) imaging has provided the practicing clinician with a method of studying brain function in patients with dementia. A large and growing number of papers report the experiences of a number of laboratories in the use of this technique in the evaluation of demented patients. Studies from several laboratories comparing patients with Alzheimer's disease to control subjects report sensitivity and specificity of SPECT perfusion imaging to be in the 80% vicinity. In addition, a number of studies suggest that the dementias that show the greatest similarities in perfusion patterns to Alzheimer's disease are multi-infarct dementia and dementia associated with Parkinson's disease. Although considerable data exist to guide the physician, a rigorous scientific approach to studying patients in a prospective, unselected clinical sample, with autopsy confirmation of the diagnosis, is needed to define dearly the utility of the technique in diagnosing dementias. C1 UNIV CALIF DAVIS,DEPT NEUROL,DAVIS,CA 95616. UNIV CALIF DAVIS,CTR ALZHEIMERS DIS,DAVIS,CA 95616. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. BRIGHAM & WOMENS HOSP,DEPT RADIOL,BOSTON,MA 02115. MASSACHUSETTS GEN HOSP,DEPT NEUROL,BOSTON,MA 02114. HARVARD UNIV,SCH MED,DEPT NEUROL,BOSTON,MA 02115. FU NIA NIH HHS [P30 AG10129, AG07793] NR 57 TC 12 Z9 12 U1 0 U2 0 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 1051-2284 J9 J NEUROIMAGING JI J. Neuroimaging PD JUL PY 1995 VL 5 SU 1 BP S45 EP S52 PG 8 WC Clinical Neurology; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA RK853 UT WOS:A1995RK85300007 PM 7626837 ER PT J AU REYNOLDS, GAM FUNG, AWP WANG, ZH DRESSELHAUS, MS PEKALA, RW AF REYNOLDS, GAM FUNG, AWP WANG, ZH DRESSELHAUS, MS PEKALA, RW TI THE EFFECTS OF EXTERNAL CONDITIONS ON THE INTERNAL STRUCTURE OF CARBON AEROGELS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4th International Symposium on Aerogels CY SEP 19-21, 1994 CL BERKELEY, CA AB Carbon aerogels with various particle (grain) sizes, mass densities and heat-treatment temperature were studied. Effects of these externally controllable parameters on the internal structure and properties of the carbon aerogel material were examined using techniques such as room-temperature Raman spectroscopy, temperature-dependent magnetic susceptibility and temperature-dependent dark- and photo-conductivities. The results show that the in-plane microcrystallite size increases with heat-treatment temperature, the electrical conductivity increases with mass density, and the particle size affects the unpaired spin disorder present, The transport mechanism common to all the samples is attributed to a variable-range hopping about a Coulomb gap. C1 MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139. MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139. LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP REYNOLDS, GAM (reprint author), MIT,DEPT PHYS,CAMBRIDGE,MA 02139, USA. NR 19 TC 39 Z9 41 U1 2 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 188 IS 1-2 BP 27 EP 33 DI 10.1016/0022-3093(95)00029-1 PG 7 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RM291 UT WOS:A1995RM29100004 ER PT J AU PEKALA, RW ALVISO, CT LU, X GROSS, J FRICKE, J AF PEKALA, RW ALVISO, CT LU, X GROSS, J FRICKE, J TI NEW ORGANIC AEROGELS BASED UPON A PHENOLIC-FURFURAL REACTION SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4th International Symposium on Aerogels CY SEP 19-21, 1994 CL BERKELEY, CA AB The aqueous polycondensation of (1) resorcinol with formaldehyde and (2) melamine with formaldehyde are two proven synthetic routes for the formation of organic aerogels. A new type of organic aerogel based upon a phenolic-furfural (PF) reaction was recently discovered. This sol-gel polymerization has a major advantage over past approaches since it can be conducted in alcohol (e.g., 1-propanol), thereby eliminating the need for a solvent exchange step prior to supercritical drying from carbon dioxide. The resultant aerogels are dark brown in color and can be converted to a carbonized version upon pyrolysis in an inert atmosphere. Brunauer-Emmett-Teller (BET) surface areas of 350-600 m(2)/g have been measured, and transmission electron microscopy reveals an interconnected structure of irregularly shaped particles or platelets with similar to 10 nm dimensions. Thermal conductivities as low as 0.015 W/m K have been recorded for PF aerogels under ambient conditions. Chemistry and structure-properly relationships of these new materials are described. C1 UNIV WURZBURG,INST PHYS,D-97074 WURZBURG,GERMANY. RP PEKALA, RW (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550, USA. NR 18 TC 120 Z9 128 U1 2 U2 33 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 188 IS 1-2 BP 34 EP 40 DI 10.1016/0022-3093(95)00027-5 PG 7 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RM291 UT WOS:A1995RM29100005 ER PT J AU HRUBESH, LW POCO, JF AF HRUBESH, LW POCO, JF TI THIN AEROGEL FILMS FOR OPTICAL, THERMAL, ACOUSTIC AND ELECTRONIC APPLICATIONS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article; Proceedings Paper CT 4th International Symposium on Aerogels CY SEP 19-21, 1994 CL BERKELEY, CA ID GEL AB Aerogels are a special class of continuously porous solid materials which are characterized by nanometer size particles and pores. Typically, aerogels are made using sol-gel chemistry to form a solvent filled, high porosity gel that is dried by removing the solvent without collapsing the tenuous solid phase. As bulk materials, aerogels are known to have many exceptional, and even some unique physical properties. Aerogels provide the highest thermal insulation and lowest dielectric constant of any other material known. However, some important applications require the aerogels in the form of thin films or sheets. For example, electronic applications require micrometer thin aerogel films bonded to a substrate, and others require thicker films, either on a substrate or as free standing sheets. Special methods are required to make aerogel thin films or sheets. In this paper, the special conditions needed to fabricate thin aerogel films are discussed and methods to make films and thin sheets are described. Also, some specific applications are given for which aerogel films are being developed. RP HRUBESH, LW (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550, USA. NR 17 TC 91 Z9 113 U1 8 U2 38 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 188 IS 1-2 BP 46 EP 53 DI 10.1016/0022-3093(95)00028-3 PG 8 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RM291 UT WOS:A1995RM29100007 ER PT J AU FLEETWOOD, DM WARREN, WL SHANEYFELT, MR DEVINE, RAB SCOFIELD, JH AF FLEETWOOD, DM WARREN, WL SHANEYFELT, MR DEVINE, RAB SCOFIELD, JH TI ENHANCED MOS 1/F NOISE DUE TO NEAR-INTERFACIAL OXYGEN DEFICIENCY SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID OXIDE-SEMICONDUCTOR DEVICES; RADIATION-INDUCED CHARGE; BORDER TRAPS; 1-F NOISE; TRANSISTORS; TEMPERATURE; CHANNEL; MOSFETS AB The 1/f noise and radiation response of MOS transistors have been compared. A strong correlation is found between the pre- and post-irradiation noise of the transistors and their threshold-voltage shifts due to radiation-induced oxide-trap charge. It is inferred that the noise is caused by a subset of the oxide traps, which is referred to as 'border traps'. These defects are near-interfacial oxide traps which can communicate with the Si on the timescales of the measurements, and have been mistaken for interface traps in some previous work on 1/f noise and/or radiation effects on MOS devices. Comparisons of electron-paramagnetic-resonance and radiation-effects studies offer compelling evidence that radiation-induced oxide-trap charge is associated with oxygen-deficient centers (oxygen vacancies and vacancy complexes) near the Si/SiO2 interface. It is concluded that these same defects also enhance the 1/f noise of MOS transistors, which should help to resolve the long-standing debate on the origin of MOS noise. Independent estimates of radiation-induced border-trap charge densities using a dual-transistor technique that combines threshold-voltage and charge-pumping measurements agree well with 1/f noise estimates. C1 FRANCE TELECOM,CTR NATL ETUD TELECOMMUN,F-38243 MEYLAN,FRANCE. OBERLIN COLL,DEPT PHYS,OBERLIN,OH 44074. RP FLEETWOOD, DM (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 40 TC 18 Z9 18 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 187 BP 199 EP 205 DI 10.1016/0022-3093(95)00138-7 PG 7 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RK195 UT WOS:A1995RK19500037 ER PT J AU ROBERTSON, J WARREN, WL KANICKI, J AF ROBERTSON, J WARREN, WL KANICKI, J TI NATURE OF THE SI AND N DANGLING BONDS IN SILICON-NITRIDE SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID AMORPHOUS-SILICON; ELECTRONIC-STRUCTURE; GAP STATES; THIN-FILMS; FLUCTUATIONS; DEFECTS AB Si and nitrogen dangling bond defects in amorphous silicon nitride a-SINx:H are most stable in their charged, diamagnetic states. Excitation to their paramagnetic states is found to occur by both charge conversion of Si defects or N defects or by charge transfer between Si and N defects. The stability of charged defects is modelled in terms of potential fluctuations whose magnitude exceeds their positive correlation energy. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV MICHIGAN,DEPT ELECT ENGN & COMP SCI,ANN ARBOR,MI 48109. RP ROBERTSON, J (reprint author), UNIV CAMBRIDGE,DEPT ENGN,CAMBRIDGE CB2 1PZ,ENGLAND. RI Kanicki, Jerzy/E-2753-2016 OI Kanicki, Jerzy/0000-0002-3649-8360 NR 20 TC 33 Z9 33 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 187 BP 297 EP 300 DI 10.1016/0022-3093(95)00153-0 PG 4 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RK195 UT WOS:A1995RK19500054 ER PT J AU WARREN, WL DIMOS, D AF WARREN, WL DIMOS, D TI PHOTO-ASSISTED SWITCHING AND TRAPPING IN BATIO3 AND PB(ZR, TI)O-3 FERROELECTRICS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID PLZT AB The effects of optical illumination and charge creation have been investigated in (Pb,La) (Zr,Ti)O-3 (PLZT) and BaTiO3 ferroelectric materials. Intrinsic photo-induced switching and charge trapping are observed in both perovskite materials. The trapping manifests itself by pinning domain walls, thereby suppressing the amount of switchable polarization. The photoferroelectric effects are found to be reproducible, reversible, and stable in both PLZT and BaTiO3. These results reinforce the idea that electronic charge trapping centers can lock certain domain configurations. RP WARREN, WL (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 10 TC 9 Z9 9 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 187 BP 448 EP 452 DI 10.1016/0022-3093(95)00177-8 PG 5 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RK195 UT WOS:A1995RK19500080 ER PT J AU DEVINE, RAB WARREN, WL KANICKI, J MATSUMARA, M AF DEVINE, RAB WARREN, WL KANICKI, J MATSUMARA, M TI PROCEEDINGS OF E-MRS SPRING MEETING, SYMPOSIUM A - AMORPHOUS INSULATING THIN-FILMS STRASBOURG, FRANCE 24-27 MAY 1994 - PREFACE SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Editorial Material C1 CNET,CNS,MEYLAN,FRANCE. SANDIA NATL LABS,ADV MAT LAB,ALBUQUERQUE,NM 87185. UNIV MICHIGAN,CTR DISPLAY TECHNOL & MFG,ANN ARBOR,MI. TOKYO INST TECHNOL,DEPT PHYS ELECTR,TOKYO 152,JAPAN. RI Kanicki, Jerzy/E-2753-2016 OI Kanicki, Jerzy/0000-0002-3649-8360 NR 0 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD JUL PY 1995 VL 187 BP R7 EP R7 DI 10.1016/0022-3093(95)80029-8 PG 1 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA RK195 UT WOS:A1995RK19500001 ER PT J AU LHUILLIER, A AUGUSTE, T BALCOU, PH CARRE, B MONOT, P SALIERES, P ALTUCCI, C GAARDE, MB LARSSON, J MEVEL, E STARCZEWSKI, T SVANBERG, S WAHLSTROM, CG ZERNE, R BUDIL, KS DITMIRE, T PERRY, MD AF LHUILLIER, A AUGUSTE, T BALCOU, PH CARRE, B MONOT, P SALIERES, P ALTUCCI, C GAARDE, MB LARSSON, J MEVEL, E STARCZEWSKI, T SVANBERG, S WAHLSTROM, CG ZERNE, R BUDIL, KS DITMIRE, T PERRY, MD TI HIGH-ORDER HARMONICS - A COHERENT SOURCE IN THE XUV RANGE SO JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS LA English DT Article ID OPTICAL OSCILLATOR-STRENGTHS; ELECTRONIC EXCITATION; HIGH-RESOLUTION; GENERATION; LASER; ATOMS; XENON; PHOTOABSORPTION; FIELDS; IONS AB We review the main results concerning high-order generation processes from the point of view of a potential user of this new source of XUV radiation. The perspectives for optimizing the source, both in efficiency and in spectral range, its characteristics and in particular, its coherence properties, are discussed. Finally, we describe two experiments, which demonstrate the usefulness of the harmonics as a short-pulse, coherent source in the XUV domain. C1 LUND INST TECHNOL,DEPT PHYS,S-22100 LUND,SWEDEN. LAWRENCE LIVERMORE NATL LAB,LASER PROGRAM,LIVERMORE,CA 94550. UNIV COPENHAGEN,NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK. RP LHUILLIER, A (reprint author), CTR ETUD SACLAY,SERV PHOTONS ATOMES & MOLECULES,F-91191 GIF SUR YVETTE,FRANCE. RI Altucci, Carlo/J-4223-2012; SALIERES, Pascal/L-7776-2014; L'Huillier, Anne/P-4379-2015 OI SALIERES, Pascal/0000-0001-5899-8246; L'Huillier, Anne/0000-0002-1335-4022 NR 36 TC 37 Z9 37 U1 0 U2 4 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-1991 J9 J NONLINEAR OPT PHYS JI J. Nonlinear Opt. Phys. Mater. PD JUL PY 1995 VL 4 IS 3 BP 647 EP 665 DI 10.1142/S0218863595000288 PG 19 WC Optics; Physics, Applied SC Optics; Physics GA RX845 UT WOS:A1995RX84500008 ER PT J AU DITMIRE, T CRANE, JK NGUYEN, H PERRY, MD AF DITMIRE, T CRANE, JK NGUYEN, H PERRY, MD TI PLASMA EFFECTS ON HIGH-ORDER HARMONIC-GENERATION SO JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS LA English DT Article ID RARE-GASES; LASER; IONIZATION; INTENSITY; XENON; DYNAMICS; COHERENT; DENSITY; HELIUM AB Experimental measurements of the effects of plasma formation on high order harmonic radiation are presented. We discuss the range of wavelengths that are attainable through harmonic generation and examine the limitations imposed by free electron phase matching to extending the harmonic plateau. We then present harmonic energy yield measurements for the 350 to 170 angstrom range under optimum, high conversion efficiency conditions. Results showing the effects of plasma formation on the spatial and spectral profiles of the harmonic under these high conversion efficiency conditions are also presented. RP DITMIRE, T (reprint author), LAWRENCE LIVERMORE NATL LAB,LASER PROGRAM,L-443,POB 808,LIVERMORE,CA 94550, USA. NR 39 TC 6 Z9 6 U1 1 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-1991 J9 J NONLINEAR OPT PHYS JI J. Nonlinear Opt. Phys. Mater. PD JUL PY 1995 VL 4 IS 3 BP 737 EP 755 DI 10.1142/S021886359500032X PG 19 WC Optics; Physics, Applied SC Optics; Physics GA RX845 UT WOS:A1995RX84500012 ER PT J AU FOWLER, JS WANG, GJ LOGAN, J XIE, S VOLKOW, ND MACGREGOR, RR SCHLYER, DJ PAPPAS, N ALEXOFF, DL PATLAK, C WOLF, AP AF FOWLER, JS WANG, GJ LOGAN, J XIE, S VOLKOW, ND MACGREGOR, RR SCHLYER, DJ PAPPAS, N ALEXOFF, DL PATLAK, C WOLF, AP TI SELECTIVE REDUCTION OF RADIOTRACER TRAPPING BY DEUTERIUM SUBSTITUTION - COMPARISON OF CARBON-11-L-DEPRENYL AND CARBON-11-DEPRENYL-D2 FOR MAO-B MAPPING SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE MONOAMINE OXIDASE B; CARBON-11-DEPRENYL-D2; ENZYME MAPPING ID MONOAMINE OXIDASE-B; POSITRON EMISSION TOMOGRAPHY; BRAIN TRANSFER CONSTANTS; TIME UPTAKE DATA; GRAPHICAL EVALUATION; PARKINSONS-DISEASE; L-DEPRENYL; BINDING; BLOOD; PET AB Recent human PET studies with the monoamine oxidase B (MAO B) tracer [C-11]L-deprenyl show that the rapid rate of radiotracer trapping relative to transport reduces the sensitivity of the tracer in regions of high MAO B concentration. This study investigates the use of deuterium substituted L-deprenyl ([C-11]L-deprenyl-D2) to reduce the rate of trapping in tissue and to improve sensitivity. Methods: Five normal subjects (43-64 yr) were studied with [C-11]L-deprenyl and [C-11]L-deprenyl-D2 on the same day. Time-activity data from different brain regions and the arterial plasma were analyzed using a three-compartment model as well as graphical analysis for irreversible systems. Results: For both tracers, maximum radioactivity accumulation occurred at about 5 min. For [C-11]L-deprenyl, C-11 concentration peaked at 5 min and remained constant throughout the study. With [C-11]L-deprenyl-D2, peak C-11 concentration also occurred at about 5 min but was followed by an initial washout. Carbon-ii concentration generally plateaued from 30 to 60 min. The plateau for [C-11]L-deprenyl was higher than the plateau for [C-11]L-deprenyl-D2. Data analysis by a three-compartment model and by graphical analysis showed that deuterium substitution: (a) does not affect plasma to tissue transport (K-1); (b) reduces the rate of trapping of C-11 in all brain regions; (c) facilitates the separation of model terms related to radiotracer delivery from radiotracer trapping in tissue; and (d) improves tracer sensitivity. Conclusion: This study demonstrates that deuterium substitution causes a significant reduction in the rate of trapping of labeled deprenyl, providing a direct link between radiotracer uptake and MAO B in the human brain and enhancing tracer sensitivity to changes in MAO B concentration. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. SUNY STONY BROOK HOSP,DEPT PSYCHIAT,STONY BROOK,NY. SUNY STONY BROOK HOSP,DEPT SURG,STONY BROOK,NY. RP FOWLER, JS (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. FU NINDS NIH HHS [NS 15380, NS 15638] NR 38 TC 91 Z9 92 U1 1 U2 10 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD JUL PY 1995 VL 36 IS 7 BP 1255 EP 1262 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA RG113 UT WOS:A1995RG11300025 PM 7790952 ER PT J AU VOLKOW, ND FOWLER, JS LOGAN, J GATLEY, SJ DEWEY, SL MACGREGOR, RR SCHLYER, DJ PAPPAS, N KING, P WANG, GJ WOLF, AP AF VOLKOW, ND FOWLER, JS LOGAN, J GATLEY, SJ DEWEY, SL MACGREGOR, RR SCHLYER, DJ PAPPAS, N KING, P WANG, GJ WOLF, AP TI CARBON-11-COCAINE BINDING COMPARED AT SUBPHARMACOLOGICAL AND PHARMACOLOGICAL DOSES - A PET STUDY SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE COCAINE; POSITRON EMISSION TOMOGRAPHY; PHARMACOKINETICS; LOW-AFFINITY BINDING SITES; DOPAMINE TRANSPORTERS ID POSITRON EMISSION TOMOGRAPHY; COCAINE RECEPTORS; NONHUMAN-PRIMATES; UPTAKE INHIBITOR; UPTAKE SITES; DOPAMINE; INVIVO; TRANSPORTERS; DESIPRAMINE; STRIATUM AB We have characterized cocaine binding in the brain to a high-affinity site on the dopamine transporter using PET and tracer doses of [C-11]cocaine in the baboon in vivo. The binding pattern, however, of cocaine at tracer (subpharmacological) doses may differ from that observed when the drug is taken in behaviorally active doses particularly since in vitro studies have shown that cocaine also binds to low affinity binding sites. Methods: PET was used to compare and characterize [(11)]cocaine binding in the baboon brain at low subpharmacological (18 mu g average dose) and at pharmacological (8000 mu g) doses. Serial studies on the same day in the same baboon were used to assess the reproducibility of repeated measures and to assess the effects of drugs which inhibit the dopamine, norepinephrine and serotonin transporters. Time-activity curves from brain and the arterial plasma input function were used to calculate the steady-state distribution volume (DV). Results: At subpharmacological doses, [C-11]cocaine had a higher binding and slower clearance in striatum than in other brain regions. At pharmacological doses, [C-11]cocaine had a more homogeneous distribution. Bmax/Kd for sub-pharmacological [C-11]cocaine corresponded to 0.5-0.6 and for pharmacological [C-11]cocaine it corresponded to 0.1-0.2. Two-point Scatchard analysis gave Bmax = 2300 pmole/g and Kd = 3600 nM. Bmax/Kd for sub-pharmacological doses of [C-11]cocaine was decreased by cocaine and drugs that inhibit the dopamine transporter, to 0.1-0.2, but not by drugs that inhibit the serotonin or the norepinephrine transporter. None of these drugs changed Bmax/Kd for a pharmacological dose of [C-11]cocaine. Conclusion: At subpharmacological doses, [C-11]cocaine binds predominantly to a high-affinity site on the dopamine transporter. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. SUNY STONY BROOK,DEPT PSYCHIAT,STONY BROOK,NY 11794. RP VOLKOW, ND (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NIDA NIH HHS [5RO1-DA06278]; NINDS NIH HHS [5PO1-NS15380, 5PO1-NS15638] NR 36 TC 36 Z9 36 U1 3 U2 4 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD JUL PY 1995 VL 36 IS 7 BP 1289 EP 1297 PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA RG113 UT WOS:A1995RG11300031 PM 7790958 ER PT J AU MOZLEY, PD STUBBS, JB KIM, HJ MCELGIN, W CHUMPRADIT, S KUNG, MP ROMANIELLO, G KUNG, HF AF MOZLEY, PD STUBBS, JB KIM, HJ MCELGIN, W CHUMPRADIT, S KUNG, MP ROMANIELLO, G KUNG, HF TI DOSIMETRY OF A D2/D3 DOPAMINE-RECEPTOR ANTAGONIST THAT CAN BE USED WITH PET OR SPECT SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE FIDA-2; DOSIMETRY; DOPAMINE RECEPTOR; POSITRON EMISSION TOMOGRAPHY; SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY ID POSITRON EMISSION TOMOGRAPHY; IMAGING AGENT; RAT-BRAIN; RADIOLIGAND; BIODISTRIBUTION; SCHIZOPHRENIA; OCCUPANCY; BINDING; INVITRO; POTENT AB FIDA-2 {R-(+)-2,3-dimethoxy-5-iodo-N-[(1-4'-fluorobenzyl)-2-pyrrolidinyl) methyl] benzamide) is a simultaneously fluorinated and iodinated D2/D3 dopamine receptor antagonist. The purpose of this study was to measure its biodistribution and radiation dosimetry in humans. Methods: Whole-body emission scans were sequentially acquired in eight healthy Volunteers 24-43 hr after the intravenous administration of 101-150 MBq I-123 FIDA-2. Regions of interest (ROIs) were placed on the initial set of conjugate emission images and transposed as a single set onto all the other scans without manipulating any of the regions for solid organs independently. The counts in each ROI were corrected for attenuation with transmission scans and compared to the net counts in images of the injection syringe containing the administered dose. The radiation doses were estimated with the MIRD formalism from the residence times for both the F-18- and I-123-labeled ligands. Results: There were no subjective or objective pharmacological effects of the tracer on any of the subjects. The findings showed that the dose-limiting organ for the (123)-labeled product was the thyroid gland in this sample. If the F-18-labeled product had been used, then the urinary bladder would have received 0.086 mGy/MBq (0.32 rads/mCi) and become the dose-limiting organ. The effective dose equivalents were 0.025 mSv/MBq (0.092 rem/mCi) for both the I-123- and the F-18-labeled versions of the tracer. Conclusion: The data suggest that FIDA-2 can be used to produce relatively high contrast images of the D2/D3 dopaminergic system with substantially less than the maximum allowable radiation dose for research volunteers. C1 UNIV PENN,MED CTR,DIV NUCL MED,PHILADELPHIA,PA 19104. OAK RIDGE INST SCI & EDUC,CTR RADIAT INTERNAL DOSE INFORMAT,OAK RIDGE,TN. FU NIMH NIH HHS [MH-43880]; NINDS NIH HHS [NS-24538] NR 46 TC 6 Z9 7 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD JUL PY 1995 VL 36 IS 7 BP 1322 EP 1331 PG 10 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA RG113 UT WOS:A1995RG11300036 PM 7790963 ER PT J AU OELKERS, EH HELGESON, HC SHOCK, EL SVERJENSKY, DA JOHNSON, JW POKROVSKII, VA AF OELKERS, EH HELGESON, HC SHOCK, EL SVERJENSKY, DA JOHNSON, JW POKROVSKII, VA TI SUMMARY OF THE APPARENT STANDARD PARTIAL MOLAL GIBBS FREE-ENERGIES OF FORMATION OF AQUEOUS SPECIES, MINERALS, AND GASES AT PRESSURES 1 TO 5000 BARS AND TEMPERATURES 25 TO 1000-DEGREES-C SO JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA LA English DT Article DE AQUEOUS SPECIES; ELECTROLYTE SOLUTIONS; GASES; GIBBS FREE ENERGIES OF FORMATION; H2O; WATER MINERAL INTERACTION ID SUPERCRITICAL ELECTROLYTE-SOLUTIONS; THERMODYNAMIC PROPERTIES; TRANSPORT-PROPERTIES; THEORETICAL PREDICTION; HYDROTHERMAL SOLUTIONS; DISSOCIATION-CONSTANTS; ACTIVITY-COEFFICIENTS; RELATIVE STABILITIES; BOEHMITE SOLUBILITY; ALUMINUM SPECIATION AB Accurate values of the apparent standard partial molal Gibbs free energies of formation (Delta (G) over bar degrees) of aqueous species, minerals, and gases at high temperatures and pressures are a requisite for characterizing a variety of industrial and natural processes including corrosion of metals, solvent extraction, crystal growth, metamorphism, and the formation of hydrothermal ore deposits. Revision of the HKF equations of state for aqueous species other than H2O (Helgeson, Kirkham and Flowers, 1981) by Tanger and Helgeson (1988) and Shock et al. (1992) permits calculation of Delta (G) over bar degrees for these species at temperatures to 1000 degrees C and pressures to 5000 bars. The revised equations of state were combined with parameters generated by Shock and Helgeson (1988, 1990), Shock et al. (1989), Sassani and Shock (1990), Shock and McKinnon (1993), Shock and Koretsky (1993), Schulte and Shock (1993), Pokrovskii and Helgeson (1995 a, b, and c), and Sverjensky et al. (1995) together with densities and electrostatic properties of H2O computed from equations summarized by Johnson and Norton (1991) to calculate values of Delta G degrees for aqueous species as a function of temperature and pressure. The results of these calculations are tabulated for 348 such species,including both inorganic and organic aqueous ions, neutral species, and metal ligand complexes. Similar calculations using equations, parameters, and thermodynamic data taken from Kelley (1960), Helgeson er al. (1978), Wagman et al. (1982), Hill (1990), Shock (1993), and Pokrovskii and Helgeson (1995 a and b) were used to generate tables of Delta (G) over bar degrees for H2O, 22 minerals, and 18 gases. The tabulated values of Delta (G) over bar degrees which were generated with the aid of SUPCRT92 (Johnson et al., 1999), facilitate considerably assessment of the thermodynamic behavior of chemical processes at both high and low temperatures and pressures. (C) 1995 American Institute of Physics and American Chemical Society. C1 UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720. WASHINGTON UNIV,DEPT EARTH & SPACE SCI,ST LOUIS,MO 63130. JOHNS HOPKINS UNIV,DEPT EARTH & SPACE SCI,BALTIMORE,MD 21218. LAWRENCE LIVERMORE NATL LAB,DIV EARTH SCI,LIVERMORE,CA 94550. ETH ZENTRUM,DEPR ERDWISSENSCH,CH-8092 ZURICH,SWITZERLAND. RP OELKERS, EH (reprint author), UNIV TOULOUSE 3,CNRS,GEOCHIM LAB,38 RUE TRENTE SIX PONTS,F-31400 TOULOUSE,FRANCE. RI Sverjensky, Dimitri/A-4612-2017 NR 88 TC 66 Z9 73 U1 8 U2 40 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0047-2689 J9 J PHYS CHEM REF DATA JI J. Phys. Chem. Ref. Data PD JUL-AUG PY 1995 VL 24 IS 4 BP 1401 EP 1560 PG 160 WC Chemistry, Multidisciplinary; Chemistry, Physical; Physics, Multidisciplinary SC Chemistry; Physics GA RU874 UT WOS:A1995RU87400001 ER PT J AU ZHU, SJ HAMILTON, JH RAMAYYA, AV BABU, BRS LU, QH MA, WC GINTER, TN WANG, MG KORMICKI, J DENG, JK SHI, D COLE, JD ARYAEINEJAD, R RASMUSSEN, J STOYER, MA CHU, SY GREGORICH, KE MOHAR, MF PRUSSIN, S TERAKOPIAN, GM OGANESSIAN, YT JOHNSON, NR LEE, IY MCGOWAN, FK AF ZHU, SJ HAMILTON, JH RAMAYYA, AV BABU, BRS LU, QH MA, WC GINTER, TN WANG, MG KORMICKI, J DENG, JK SHI, D COLE, JD ARYAEINEJAD, R RASMUSSEN, J STOYER, MA CHU, SY GREGORICH, KE MOHAR, MF PRUSSIN, S TERAKOPIAN, GM OGANESSIAN, YT JOHNSON, NR LEE, IY MCGOWAN, FK TI IDENTIFICATION OF LEVELS IN SM-160 AND NEW HIGH-SPIN STATES IN SM-156,SM-158 SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS LA English DT Letter ID RARE-EARTH ISOTOPES; FISSION; CF-252 AB From gamma-gamma, x-x, x-gamma, and gamma-gamma-gamma coincidence studies of spontaneous fission of Cf-252, Sm-160 levels were identified along with new high spin states in Sm-156,Sm-158. New bands, beginning at 5(-) in Sm-156,Sm-158 are assigned a two-neutron configuration {5/2(+)[642], 5/2(-)[523]}5(-). The J(1) and J(2) values for the yrast bands increase smoothly with spin and neutron number and the differences in these values for corresponding transitions in neighbouring isotopes are reasonably constant. C1 ORISE,UNISOR,OAK RIDGE,TN 37851. VANDERBILT UNIV,DEPT PHYS,NASHVILLE,TN 37235. TSING HUA UNIV,DEPT PHYS,BEIJING 100084,PEOPLES R CHINA. JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. DUBNA JOINT NUCL RES INST,DUBNA 141980,RUSSIA. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 6 TC 23 Z9 24 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0954-3899 J9 J PHYS G NUCL PARTIC JI J. Phys. G-Nucl. Part. Phys. PD JUL PY 1995 VL 21 IS 7 BP L57 EP L62 DI 10.1088/0954-3899/21/7/002 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA RJ544 UT WOS:A1995RJ54400002 ER PT J AU BRONZINI, HS MASON, JM TARRIS, JP ZAKI, E AF BRONZINI, HS MASON, JM TARRIS, JP ZAKI, E TI CHOOSING A CIVIL ENGINEERING CAREER - SOME MARKET-RESEARCH FINDINGS SO JOURNAL OF PROFESSIONAL ISSUES IN ENGINEERING EDUCATION AND PRACTICE LA English DT Article AB The facts and trends affecting entry into the civil engineering profession merit the serious attention of all those concerned with providing high-quality civil engineering services to society. An extensive market research study, involving 17 focus groups comprising students, parents, teachers, counselors, engineering faculty, and practicing civil engineers confirmed that the civil engineering profession faces serious image and recruiting problems. The image of civil engineering among students and their adult influencers is unflattering, inaccurate, and almost nonexistent. Precollege mathematics and science curriculums generally do a poor job of communicating the relevance of these subjects, and informing students of the career possibilities in engineering and other technical fields. An intervention program that incorporates heightening the awareness of engineering, technology, and civil engineering; increasing the retention of the pool of students with interest and ability in these fields; and modifying curriculum from kindergarten through college is proposed. A successful program would produce a better informed, more highly motivated, and more diverse pool of civil engineering students and graduates. C1 PENN STATE UNIV,PENN TRANSP INST,TRANSP OPERAT PROGRAM,UNIVERSITY PK,PA 16802. KILARESKI & MASON PC,FORENS SERV,STATE COLL,PA 16801. RP BRONZINI, HS (reprint author), OAK RIDGE NATL LAB,CTR TRANSP ANAL,OAK RIDGE,TN 37831, USA. NR 7 TC 0 Z9 0 U1 1 U2 1 PU ASCE-AMER SOC CIVIL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 1052-3928 J9 J PROF ISS ENG ED PR JI J. Prof. Issues Eng. Educ. Pract. PD JUL PY 1995 VL 121 IS 3 BP 170 EP 176 PG 7 WC Education, Scientific Disciplines; Engineering, Multidisciplinary SC Education & Educational Research; Engineering GA RD999 UT WOS:A1995RD99900004 ER PT J AU MARGOLIS, SB WILLIAMS, FA AF MARGOLIS, SB WILLIAMS, FA TI EFFECTS OF 2-PHASE FLOW ON THE DEFLAGRATION OF POROUS ENERGETIC MATERIALS SO JOURNAL OF PROPULSION AND POWER LA English DT Article ID 2-PHASE FLOW; HEAT-TRANSFER; COMBUSTION; FILTRATION AB Theoretical analyses are developed for the multiphase deflagration of porous energetic solids, such as degraded nitramine propellants, that experience significant gas how in the solid preheat region and are characterized by the presence of exothermic reactions in a babbling melt layer at their surfaces. Relative motion between the gas and condensed phases is taken into account in both regions, and expressions fur the mass burning rate and other quantities of interest, such as temperature and volume-fraction profiles, are derived by activation-energy asymptotics. The model extends recent work by allowing for gas flow in the unburned solid, and by incorporating pressure effects through the gas-phase equation of state. As a consequence, it is demonstrated how most aspects of the deflagration wave, including its structure, propagation speed, and final temperature, depend on the local pressure in the two-phase regions. C1 UNIV CALIF SAN DIEGO,DEPT APPL MECH & ENGN SCI,SAN DIEGO,CA 92093. RP MARGOLIS, SB (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 14 TC 19 Z9 19 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD JUL-AUG PY 1995 VL 11 IS 4 BP 759 EP 768 DI 10.2514/3.23901 PG 10 WC Engineering, Aerospace SC Engineering GA RH217 UT WOS:A1995RH21700021 ER PT J AU HINCKLEY, CM BARKAN, P AF HINCKLEY, CM BARKAN, P TI THE ROLE OF VARIATION, MISTAKES, AND COMPLEXITY IN PRODUCING NONCONFORMITIES SO JOURNAL OF QUALITY TECHNOLOGY LA English DT Article DE NONCONFORMITIES; PRODUCT DESIGN; QUALITY; IMPROVEMENT; SOURCES OF VARIABILITY AB Variation in component properties and dimensions is the most widely recognized cause of product nonconformities. However, conventional statistical methods, like statistical process control (SPC), are ineffective in controlling mistakes. The distinction between mistakes and variation becomes increasingly important as the target nonconformity rates approach extremely low values as substantiated by Motorola's experience. Product complexity increases the likelihood of nonconformities due to both variation and mistakes and is thus a root source of nonconformities. We have shown that assembly complexity, quantified using design for assembly analysis, is highly correlated with nonconformity data in two widely different industries. These correlations and the ability to easily measure assembly complexity permits rapid comparison of the potential nonconformity rates of alternate design concepts. C1 STANFORD UNIV,DEPT MECH ENGN,STANFORD,CA 94305. RP HINCKLEY, CM (reprint author), SANDIA NATL LABS,TECH STAFF,LIVERMORE,CA 94551, USA. NR 19 TC 11 Z9 11 U1 0 U2 2 PU AMER SOC QUALITY CONTROL-ASQC PI MILWAUKEE PA ASQC MEMBERSHIP MANAGER 611 E. WISCONSIN AVENUE, MILWAUKEE, WI 53202 SN 0022-4065 J9 J QUAL TECHNOL JI J. Qual. Technol. PD JUL PY 1995 VL 27 IS 3 BP 242 EP 249 PG 8 WC Engineering, Industrial; Operations Research & Management Science; Statistics & Probability SC Engineering; Operations Research & Management Science; Mathematics GA RK218 UT WOS:A1995RK21800006 ER PT J AU BACK, CA BERGER, RL ESTABROOK, K FAILOR, BH HSING, WW HSIEH, EJ HOCKADAY, R KALANTAR, DH KAUFFMAN, RL KEANE, CJ KLEM, DE MACGOWAN, BJ MONTGOMERY, DS MOODY, JD POWERS, LV SHEPARD, TD STONE, GF SUTER, LJ TURNER, RE AF BACK, CA BERGER, RL ESTABROOK, K FAILOR, BH HSING, WW HSIEH, EJ HOCKADAY, R KALANTAR, DH KAUFFMAN, RL KEANE, CJ KLEM, DE MACGOWAN, BJ MONTGOMERY, DS MOODY, JD POWERS, LV SHEPARD, TD STONE, GF SUTER, LJ TURNER, RE TI USE OF LARGE SCALE-LENGTH PLASMAS TO STUDY PARAMETRIC PLASMA INSTABILITIES SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID RAMAN-SCATTERING AB Apart from their intrinsic interest, plasma physics processes are important because they affect the coupling of the laser energy into laser-irradiated targets. Recently, new gas-filled targets have been developed to create large mm-size plasmas for the study of stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS). We present x-ray images and x-ray spectra to characterize these targets, which show that the plasmas are homogeneous, have electron densities of similar to 10(21) cm(-3), and attain electron temperatures of similar to 3 keV. We also give SBS measurements to demonstrate how systematic studies of physical phenomena can be performed using these targets. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP BACK, CA (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, LIVERMORE, CA 94551 USA. OI Montgomery, David/0000-0002-2355-6242 NR 18 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0022-4073 EI 1879-1352 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 27 EP 34 DI 10.1016/0022-4073(95)00037-L PG 8 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600003 ER PT J AU BARSHALOM, A OREG, J GOLDSTEIN, WH AF BARSHALOM, A OREG, J GOLDSTEIN, WH TI A NEW APPROACH TO INCLUDING DOUBLY-EXCITED LEVELS IN THE COLLISIONAL RADIATIVE MODEL SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article AB A severe limitation on the application of the collisional radiative model is the need to include an exceedingly high number of relevant doubly excited and inner shell excited levels. The direct inclusion of all these levels is simply impractical. In a previous theory we have included doubly excited configurations as effective levels assuming statistical distribution of the populations within these configurations. In the present work we develop a new approach which minimizes even further the amount of effective levels, and leading, paradoxically, to weaker statistical assumptions. It is shown that the outer Rydberg orbital of the doubly excited configuration resembles a continuum electron, and is only weakly coupled to the internal core. This fact allows the application of the Factorization Interpolation method, reducing the cross-sections of the various collisional radiative processes to one electron multipole transitions between core states only. The radial integrals include the outer orbital and the summation over all the involved continuum orbitals. It is also shown that the assumption of a statistical distribution can be extended to groups of states with neighboring Rydberg orbitals. Each group then contains effective levels characterized by the core state designation and therefore has the same dimension as the original core. A convergence procedure is described that involves reducing the number of Rydberg orbitals within a group. It is shown that a small number of groups is sufficient for convergence, reducing drastically the number of effective levels in the model. The simple example of the Ne-like ion is discussed. The many thousands of relevant doubly excited states are reduced in this case to the 37 levels of the core multiplied by the small number of groups. This reduction is even more striking in more complex ions and in cases where the core is far from closed shell configurations. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BARSHALOM, A (reprint author), NUCL RES CTR,POB 9001,IL-84105 BEER SHEVA,ISRAEL. NR 6 TC 2 Z9 2 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 35 EP 42 DI 10.1016/0022-4073(95)00038-M PG 8 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600004 ER PT J AU BAUCHE, J BAUCHEARNOULT, C BACHELIER, A GOLDSTEIN, WH AF BAUCHE, J BAUCHEARNOULT, C BACHELIER, A GOLDSTEIN, WH TI EVALUATION OF CONFIGURATION-INTERACTION EFFECTS ON ATOMIC TRANSITION ARRAYS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID IONIZED ATOMS; SPECTRA AB In the field of the ab-initio simulations of atomic spectra, a method is described for taking into account the configuration-interaction effects on electric-dipolar transition arrays. As an application, the strong effects observed in the 4l-4l' arrays of the spectra of Praseodymium XV through XVIII are interpreted quantitatively. An original method is proposed for computing the intensities of the ''forbidden'' electric-dipolar arrays, which are generated by configuration interaction. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP BAUCHE, J (reprint author), CNRS,AIME COTTON LAB,F-91405 ORSAY,FRANCE. NR 9 TC 5 Z9 5 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 43 EP 51 DI 10.1016/0022-4073(95)00039-N PG 9 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600005 ER PT J AU CAUBLE, R DASILVA, LB BARBEE, TW CELLIERS, P LIBBY, S MORENO, JC RESS, D TREBES, J WAN, AS WEBER, F AF CAUBLE, R DASILVA, LB BARBEE, TW CELLIERS, P LIBBY, S MORENO, JC RESS, D TREBES, J WAN, AS WEBER, F TI HIGH-DENSITY PLASMA DIAGNOSTICS UTILIZING A NEON-LIKE YTTRIUM X-RAY LASER SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID POWER AB A neon-like yttrium laboratory x-ray laser (XRL) at 155 Angstrom has been used to perform radiography, Moire deflectometry and interferometry of plasmas created in various laser-initiated experiments. A system consisting of the XRL, multilayer mirrors, and multilayer beam splitters was assembled to obtain high resolution images of the plasmas. Work is continuing to improve the XRL-higher brightness, shorter pulse length, and enhanced coherence-through a program of simulations and experiments. RP CAUBLE, R (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 11 TC 1 Z9 1 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 97 EP 103 DI 10.1016/0022-4073(95)00045-M PG 7 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600011 ER PT J AU HEADING, DJ WARK, JS BENNETT, GR LEE, RW AF HEADING, DJ WARK, JS BENNETT, GR LEE, RW TI SIMULATIONS OF SPECTRA FROM DENSE ALUMINUM PLASMAS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID LINE-SHAPES; K-SHELL; IONS; SPECTROSCOPY; MODEL; LASER AB We describe a computer code used to predict spectra arising from neutral and near neutral species in a dense, cool plasma. The ionization potential depression and excited states of the plasma ions must be included to obtain the correct ionization balance. Good agreement between the code predictions and observed spectra is obtained. This provides a verification of the code prediction so that it could be used for plasma diagnostics. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HEADING, DJ (reprint author), UNIV OXFORD,CLARENDON LAB,PARKS RD,OXFORD OX1 3PU,ENGLAND. NR 29 TC 22 Z9 23 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 167 EP 180 DI 10.1016/0022-4073(95)00052-M PG 14 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600018 ER PT J AU IGLESIAS, CA AF IGLESIAS, CA TI DISTRIBUTION OF BOUND LEVELS OF IONS IN DENSE-PLASMAS - THE PLASMA POLARIZATION SHIFT - COMMENT SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article AB It is shown that the recently proposed statistical treatment of line shifts by Albritton and Liberman [JQSRT 51, 9 (1994)] is not valid for typical plasmas; consequently, it cannot explain the existing discrepancies between theoretical and experimental results. RP IGLESIAS, CA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 8 TC 8 Z9 8 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 181 EP 183 DI 10.1016/0022-4073(95)00053-N PG 3 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600019 ER PT J AU IGLESIAS, CA CHEN, MH MCWILLIAMS, DL NASH, JK ROGERS, FJ AF IGLESIAS, CA CHEN, MH MCWILLIAMS, DL NASH, JK ROGERS, FJ TI OBSERVATIONS ON RADIATION TRANSFER EXPERIMENTS USING K-SHELL ABSORPTION-SPECTRA SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID OPACITY; PLASMA; STATE; IONS AB Recent laser-produced plasma experiments have relied on spectroscopic comparisons with models to infer plasma temperatures. Here, the technique is applied to study thermal radiation transfer experiments. The transmission model combines high-quality atomic data with an ionization balance obtained from systematic expansions of the grand canonical ensemble. The latter avoids the ad hoc cutoffs required in free energy minimization schemes and includes Coulomb corrections usually neglected in other models. It is shown that the improved equation of state significantly effects inferred temperatures at the higher densities expected in the heat flow experiments. Even though good agreement is obtained between the experimental and theoretical transmission spectrum, the experimental uncertainties are sufficiently large that it compromises the intended bench marking of the thermal transport models. RP IGLESIAS, CA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 19 TC 14 Z9 16 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 185 EP 193 DI 10.1016/0022-4073(95)00054-O PG 9 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600020 ER PT J AU KEANE, CJ POLLAK, GW COOK, RC DITTRICH, TR HAMMEL, BA LANDEN, OL LANGER, SH LEVEDAHL, WK MUNRO, DH SCOTT, HA ZIMMERMAN, GB AF KEANE, CJ POLLAK, GW COOK, RC DITTRICH, TR HAMMEL, BA LANDEN, OL LANGER, SH LEVEDAHL, WK MUNRO, DH SCOTT, HA ZIMMERMAN, GB TI X-RAY SPECTROSCOPIC DIAGNOSTICS OF MIX IN HIGH GROWTH-FACTOR SPHERICAL IMPLOSIONS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID RAYLEIGH-TAYLOR INSTABILITY; SHELL SPECTROSCOPY; PLASMAS; FUSION; LINES; MODEL AB Rayleigh-Taylor (RT) instability of the pusher-fuel interface occurring upon acceleration and deceleration of the pusher is of major concern for current and future ICF experiments. One common diagnostic technique for measuring pusher-fuel mix in spherical implosion experiments involves placing spectroscopic dopants both in the capsule fuel region and the innermost region of the capsule wall adjacent to the fuel. As the degree of pusher-fuel mix is increased the pusher dopant x-ray emission increases relative to that of the fuel dopant. Spherical implosion experiments of this type using Ar and Ti dopants in the fuel and pusher, respectively, are being carried out on Nova. We first show that the Ti He-alpha/Ar He-beta line ratio shows promise as a mix diagnostic for high growth factor targets. We then discuss some of the important physical processes underlying Ar and Ti spectral line formation in these targets and discuss how these processes affect the calculation of simulated spectra. The importance of radiative transfer as well as high-density plasma phenomena such as continuum lowering and Stark broadening is demonstrated. The simulated spectra are also observed to be sensitive to assumptions regarding the treatment of electron thermal conduction in the mix region. Spectral postprocessing of 2-D hydrodynamic simulations using detailed line transfer methods has been carried out and implies that simple escape factor treatments must be tested carefully before they can be relied upon. Preliminary comparisons of experimental data with simulation are presented. It is shown that the computed spectra is sensitive to the laser energy and pusher temperature. These comparisons to data also imply that the inclusion of convective effects in computing the electron temperature profile through the mix region is necessary in order to satisfactorily model experimental spectra. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP KEANE, CJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 30 TC 29 Z9 29 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 207 EP 220 DI 10.1016/0022-4073(95)00056-Q PG 14 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600022 ER PT J AU KEY, MH BARBEE, TW DASILVA, LB GLENDINNING, SG KALANTAR, DH ROSE, SJ WEBER, SV AF KEY, MH BARBEE, TW DASILVA, LB GLENDINNING, SG KALANTAR, DH ROSE, SJ WEBER, SV TI NEW PLASMA DIAGNOSTIC POSSIBILITIES FROM RADIOGRAPHY WITH XUV LASERS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID RAYLEIGH-TAYLOR INSTABILITY; X-RAY LASER; TARGET AB A novel diagnostic application of x.u.v. lasers for the study of the hydrodynamic imprinting of laser speckle pattern on directly driven laser fusion targets is proposed and discussed. Initial tests of the diagnostic system are reported. C1 RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV OXFORD,OXFORD,ENGLAND. UNIV BIRMINGHAM,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RP KEY, MH (reprint author), LAWRENCE LIVERMORE NATL LAB,L-447,POB 808,LIVERMORE,CA 94551, USA. NR 13 TC 11 Z9 11 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 221 EP 226 DI 10.1016/0022-4073(95)00057-R PG 6 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600023 ER PT J AU KOCH, JA BACK, CA IGLESIAS, CA MCWILLIAMS, DL CAUBLE, RC HSIEH, EJ KORNBLUM, NH WOOLSEY, NC MORENO, JC ASFAW, A NASH, JK ROGERS, FJ LEE, RW AF KOCH, JA BACK, CA IGLESIAS, CA MCWILLIAMS, DL CAUBLE, RC HSIEH, EJ KORNBLUM, NH WOOLSEY, NC MORENO, JC ASFAW, A NASH, JK ROGERS, FJ LEE, RW TI TIME-RESOLVED TEMPERATURE-MEASUREMENTS OF RADIATIVELY HEATED TAMPED MGO FOILS BY K-ALPHA ABSORPTION-SPECTROSCOPY SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID LASER-PRODUCED PLASMA; DENSITY; OPACITY; CAMERAS AB In this paper we present time-resolved temperature measurements of a radiatively heated, thin tamped foil via K alpha absorption spectroscopy. The sample foil was 1500 Angstrom MgO, tamped on both sides with 1000 Angstrom paralyene, and was heated by soft x-rays transmitted through the back side of a separate laser-irradiated 1500 Angstrom Au foil. The resulting plasma was then backlit by a separate laser-irradiated front-surface U foil, providing a time-resolved K-shell absorption spectrum over the duration of the heating phase. We compare the resulting data to synthetic spectra obtained from detailed simulations of the heating and expansion of the tamped foils, and find poor agreement. Much better agreement is obtained when we determine the temperatures through best-fit absorption spectra which assume temperatures >35% higher than predicted; the reason for this discrepancy is not yet understood. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 28 TC 9 Z9 9 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 227 EP 236 DI 10.1016/0022-4073(95)00058-S PG 10 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600024 ER PT J AU KRESS, JD KWON, I COLLINS, LA AF KRESS, JD KWON, I COLLINS, LA TI SIMULATION OF IMPURITY LINE-SHAPES IN A HOT, DENSE-PLASMA SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID ELECTRIC MICROFIELD DISTRIBUTIONS; STATISTICAL-MECHANICS; IONIZED MATTER; FUSION AB The widths and positions of spectroscopic lines of neutral, hydrogen- and helium-like argon impurities in a dense, hot hydrogen plasma are reported. The calculations employed an integrated two-step model in which the atomic positions evolved through a molecular dynamics (MD) simulation using several different effective pair potentials and the electronic structure arose from calculations on an ArHn cluster. Integrating the resulting level shifts over an MD trajectory produced the desired line profile. We compare against other calculations in the realm of 1000 eV temperature and densities 0.25-8 g/cm(3) and present results for low temperature (10 eV). C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 35 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 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 237 EP 243 DI 10.1016/0022-4073(95)00059-T PG 7 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600025 ER PT J AU LANDEN, OL KEANE, CJ HAMMEL, BA CABLE, MD COLVIN, J COOK, R DITTRICH, TR HAAN, SW HATCHETT, SP HAY, RG KILKENNY, JD LERCHE, RA LEVEDAHL, WK MCEACHERN, R MURPHY, TJ NELSON, MB SUTER, L WALLACE, RJ AF LANDEN, OL KEANE, CJ HAMMEL, BA CABLE, MD COLVIN, J COOK, R DITTRICH, TR HAAN, SW HATCHETT, SP HAY, RG KILKENNY, JD LERCHE, RA LEVEDAHL, WK MCEACHERN, R MURPHY, TJ NELSON, MB SUTER, L WALLACE, RJ TI INDIRECTLY DRIVEN, HIGH GROWTH RAYLEIGH-TAYLOR IMPLOSIONS ON NOVA SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID X-RAY SPECTROSCOPY; FUSION; INSTABILITY; MATTER AB Indirectly-driven implosions for which the predicted Rayleigh-Taylor (RT) instability growth rates of pre-imposed capsule surface perturbations are substantially increased by mid-Z-doping of the ablators have been fielded on the Nova laser. The multiple effects on implosion performance of the additional x-ray opacity provided by the ablator dopant is discussed. For best surface finish capsules, the addition of increasing ablator dopant levels is shown to improve the neutron yield. However, as capsule surface roughness is increased, so that RT instability growth increases, this trend is reversed, leading to decreasing yields with increased dopant content. The RT-induced mixing between shell and fuel is further investigated by diagnosing the x-ray emission levels and time histories from Ti and Ar dopants in capsules with predetermined surface roughness. The x-ray line ratios show the expected decrease in fuel temperature with increasing surface roughness. The spectral content, intensity and duration of the Ti spectra, however, suggest 2- or 3-D rather than just 1-D effects are important so that higher than 1-D models of the mix region may be needed. RP LANDEN, OL (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. RI Murphy, Thomas/F-3101-2014 OI Murphy, Thomas/0000-0002-6137-9873 NR 26 TC 25 Z9 25 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 245 EP 255 DI 10.1016/0022-4073(95)00060-X PG 11 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600026 ER PT J AU NASH, JK SALTER, JM EME, WG LEE, RW AF NASH, JK SALTER, JM EME, WG LEE, RW TI THE DEVELOPMENT OF A DISTRIBUTED COMPUTING ENVIRONMENT FOR THE DESIGN AND MODELING OF PLASMA SPECTROSCOPY EXPERIMENTS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID HIGHLY CHARGED IONS; HYDROGENIC IONS; COLLISION STRENGTHS; ALUMINUM PLASMA; ELECTRON-IMPACT; CROSS-SECTIONS; IONIZATION; EXCITATION; EMISSION; LEVEL AB The design and analysis of plasma spectroscopy experiments can be significantly complicated by relatively routine computational tasks arising from the massive amount of data encountered in the experimental design and analysis stages of the work. Difficulties in obtaining, computing, manipulating, and visualizing the information represent not simply an issue of convenience-they have a very real limiting effect on the final quality of the data and on the potential for arriving at meaningful conclusions regarding an experiment. We describe ongoing work in developing a portable UNIX environment shell with the goal of simplifying and enabling these activities for the plasma-modeling community. Applications to the construction of atomic kinetics models and to the analysis of x-ray transmission spectroscopy will be shown. RP NASH, JK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-58,LIVERMORE,CA 94551, USA. NR 63 TC 5 Z9 5 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 283 EP 305 DI 10.1016/0022-4073(95)00064-R PG 23 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600030 ER PT J AU PERRY, TS BUDIL, KS CAUBLE, R WARD, RA BACH, DR IGLESIAS, CA WILSON, BG NASH, JK SMITH, CC FOSTER, JM DAVIDSON, SJ SERDUKE, FJD KILKENNY, JD LEE, RW AF PERRY, TS BUDIL, KS CAUBLE, R WARD, RA BACH, DR IGLESIAS, CA WILSON, BG NASH, JK SMITH, CC FOSTER, JM DAVIDSON, SJ SERDUKE, FJD KILKENNY, JD LEE, RW TI QUANTITATIVE MEASUREMENT OF MID-Z OPACITIES SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID PLASMA; HOT AB Results of recent experiments measuring x-ray absorption by a hot, dense, germanium plasma are presented. A general discussion of the experimental technique is given showing the requirements that must be met in order to extract quantitative transmission data. The resulting spectrally resolved absorption measurements can then be used to test the capabilities of LTE opacity codes. Meaningful comparisons require that the sample be in LTE, and that the temperature and density of the sample be uniform and accurately measured. Comparisons between the experiment and calculations are shown. C1 AWE ALDERMASTON,READING RG7 4PR,BERKS,ENGLAND. RP PERRY, TS (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. RI Perry, Theodore/K-3333-2014 OI Perry, Theodore/0000-0002-8832-2033 NR 10 TC 58 Z9 59 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 317 EP 324 DI 10.1016/0022-4073(95)00066-T PG 8 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600032 ER PT J AU SALZMANN, D LEE, YT AF SALZMANN, D LEE, YT TI AN OVERVIEW OF THE EFFECTS OF NON-MAXWELLIAN VELOCITY DISTRIBUTIONS IN LASER-PRODUCED PLASMAS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID ELECTRON DISTRIBUTIONS; IONIZATION; SPECTRA; DENSITY AB In this paper we show from theoretical considerations that within the validity limits of the steady state Collisional-Radiative model the following statements hold true: (i) the populations of the most abundant charge states are almost unaffected by non-Maxwellian electron energy distributions in the plasma, whereas the populations of rare species are strongly affected; (ii) bulk or thermodynamic properties of the plasma are almost unaffected by non-Maxwellian effects; and (iii) bound-bound or free-bound emission/absorption spectra of rare species are strongly influenced by non-Maxwellian distributions in a plasma. We have carried out a literature survey to show that recent computational and experimental studies confirm these conclusions. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP SALZMANN, D (reprint author), SOREQ NUCL RES CTR,IL-81800 YAVNE,ISRAEL. NR 15 TC 3 Z9 3 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 339 EP 344 DI 10.1016/0022-4073(95)00069-W PG 6 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600035 ER PT J AU VU, BTV LEE, RW LANDEN, OL PRICE, DF BONLIE, JD STEWART, RE AF VU, BTV LEE, RW LANDEN, OL PRICE, DF BONLIE, JD STEWART, RE TI TEMPORALLY AND RADIALLY-RESOLVED FEMTOSECOND OPTICAL MEASUREMENTS OF SOLID DENSITY PLASMA REFLECTIVITIES AND TRANSMISSIVITIES SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID LASER-PULSES AB We report on space and time-resolved femtosecond optical probing of a solid density hot plasma. The plasma is produced by 3 x 10(15) W/cm(2) intensity, 210 fs duration laser pulse irradiation of a transparent fused quartz solid target. Time-resolved measurements of reflectivity and transmissivity at the center of the plasma using a non-perturbative synchronized probe pulse incident from the rear side of the target show a rapid reflection enhancement and transmission decrease, attributed to formation of a super-critical density, steep-gradient plasma layer at the surface, The probe beam is also used to map relectivity and transmissivity at different locations from the plasma center with 20 mu m resolution. The measurements indicate radially-dependent plasma characteristics and cooling times which will be discussed in light of a radially-dependent intensity of the pump laser. RP VU, BTV (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-059,LIVERMORE,CA 94550, USA. NR 12 TC 0 Z9 0 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 413 EP 418 DI 10.1016/0022-4073(95)00077-X PG 6 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600043 ER PT J AU WARK, JS RENNER, O DJAOUI, A ROSE, SJ MISSALLA, T NEELY, D FOERSTER, E AF WARK, JS RENNER, O DJAOUI, A ROSE, SJ MISSALLA, T NEELY, D FOERSTER, E TI MEASUREMENTS AND SIMULATIONS OF THE INTENSITY AND SHAPE OF THE HYDROGENIC A1 RESONANCE LINE (1S(2)S-2P(2)P) IN LASER-PRODUCED-PLASMAS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID SPECTROSCOPY AB The one-dimensional Lagrangian hydrocode MEDUSA has been used to simulate the time-dependent spectral profile of the (1s(2)S-2p(2)P) line in hydrogenic aluminum in laser irradiated targets. The ionic populations are calculated using a non-LTE average atom model using the escape factor formulism. A multifrequency line transfer model is then employed to compute the spectral line profile. The simulations show that the line shape and position in 1-D planar geometry are strong functions of observation angle, but for a given observation angle the wavelength of the peak emission is insensitive to laser irradiance. This latter result is of relevance to proposed photopumped x-ray laser schemes. C1 ACAD SCI CZECH REPUBL,INST PHYS,CR-18040 PRAGUE,CZECH REPUBLIC. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV JENA,INST OPT & QUANTUM ELECTR,W-6900 JENA,GERMANY. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP WARK, JS (reprint author), UNIV OXFORD,DEPT PHYS,CLARENDON LAB,PARKS RD,OXFORD OX1 3PU,ENGLAND. RI Renner, Oldrich/C-1591-2010 OI Renner, Oldrich/0000-0003-4942-2637 NR 10 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 419 EP 425 DI 10.1016/0022-4073(95)00078-Y PG 7 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600044 ER PT J AU WILSON, BG LIBERMAN, DA AF WILSON, BG LIBERMAN, DA TI INSIGHTS ON THE PLASMA POLARIZATION SHIFT - A COMPARISON OF LOCAL-DENSITY APPROXIMATION AND OPTIMUM POTENTIAL METHODS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article AB The plasma polarization shift computed with a local density functional approximation of an ion-sphere model is compared with results calculated using an optimum central field effective exchange potential. Indications are that the bulk of the shift is an artifact of the approximate exchange functional describing the interaction between bound and continuum orbitals in the LDA. RP WILSON, BG (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 9 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 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 427 EP 435 DI 10.1016/0022-4073(95)00079-Z PG 9 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600045 ER PT J AU WINHART, G EIDMANN, K IGLESIAS, CA BARSHALOM, A MINGUEZ, E RICKERT, A ROSE, SJ AF WINHART, G EIDMANN, K IGLESIAS, CA BARSHALOM, A MINGUEZ, E RICKERT, A ROSE, SJ TI XUV OPACITY MEASUREMENTS AND COMPARISON WITH MODELS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID ABSORPTION-MEASUREMENTS; HOT; PLASMA; GERMANIUM; IRON AB The opacities of aluminium, iron and holmium were measured spectrally resolved in the energy range of 70 to 280 eV. For this purpose the iodine laser ASTERIX IV at the MPQ (200J/0.4 ns at 440 nm) was focused into a spherical gold Hohlraum with a dia of 3 mm. The generated radiation with a temperature of 60 eV heated thin tampered absorber foils. The transmission was measured spectrally and temporally resolved by means of a backlighter source with a delay of 0.8 ns to the main beam, At this delay time the density in the sample material is about 0.01 g/cm(3) and the temperature is about 20 eV. We have compared the experimental data with the opacity codes IMP, JIMENA, OPAL, SAPHIR and STA. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. INST NUCL FUS,E-28006 MADRID,SPAIN. NUCL RES CTR NEGEV,BEER SHEVA,ISRAEL. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV BIRMINGHAM,DEPT PHYS & SPACE SCI,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. RP WINHART, G (reprint author), MAX PLANCK INST QUANTUM OPT,D-85740 GARCHING,GERMANY. NR 20 TC 54 Z9 55 U1 2 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP 437 EP 446 DI 10.1016/0022-4073(95)00080-5 PG 10 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600046 ER PT J AU LEE, RW AF LEE, RW TI SPECIAL ISSUE - RADIATIVE PROPERTIES OF HOT DENSE MATTER .2. PREFACE SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Editorial Material RP LEE, RW (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-4073 J9 J QUANT SPECTROSC RA JI J. Quant. Spectrosc. Radiat. Transf. PD JUL-AUG PY 1995 VL 54 IS 1-2 BP R7 EP R8 DI 10.1016/0022-4073(95)90069-1 PG 2 WC Optics; Spectroscopy SC Optics; Spectroscopy GA RL456 UT WOS:A1995RL45600001 ER PT J AU SMITH, MR FARMER, OT REEVES, JH KOPPENAAL, DW AF SMITH, MR FARMER, OT REEVES, JH KOPPENAAL, DW TI RADIONUCLIDE DETECTION BY ION-CHROMATOGRAPHY AND ONLINE ICP/MS AND BETA-DETECTION - FISSION-PRODUCT RARE-EARTH ELEMENT MEASUREMENTS SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3rd International Conference on Methods and Applications of Radioanalytical Chemistry (MARC-III) CY APR 10-16, 1994 CL KAILUA KONA, HI SP Amer Nucl Soc, Div Isotopes & Radiat, Amer Nucl Soc, Div Biol & Med, Amer Nucl Soc, NO Calif Sect ID PLASMA MASS-SPECTROMETRY AB Separation and analysis of U-235 fission produced rare earth elements (REE) is described. Rare earth elements were separated using a high presure ion chromatographic separation where by each rare earth is isolated and individually detected. Detection is performed by inductively coupled plasma mass spectrometry (ICP/MS) and solid scintillation beta counting. The resulting detection methods allow complete evaluation of all stable (non-radioactive) and many radioactive REE fission products. The two detection methods (ICP/MS and Beta) illustrate how mass selective and radiometric data can be used to provide complimentary information regarding the isotopic characterization of radioactive samples. RP SMITH, MR (reprint author), PACIFIC NW LAB, POB 999,MS P8-08, RICHLAND, WA 99352 USA. NR 7 TC 10 Z9 10 U1 0 U2 2 PU AKADEMIAI KIADO RT PI BUDAPEST PA PRIELLE K U 19, PO BOX 245,, H-1117 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JUL PY 1995 VL 194 IS 1 BP 7 EP 13 DI 10.1007/BF02037607 PG 7 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA RH446 UT WOS:A1995RH44600001 ER PT J AU FRANK, SM BUNNELL, DJ CARNEY, KP JOHNSON, SG AF FRANK, SM BUNNELL, DJ CARNEY, KP JOHNSON, SG TI HOT CELL-BASED TIME-OF-FLIGHT MASS-SPECTROMETRY SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 3rd International Conference on Methods and Applications of Radioanalytical Chemistry (MARC-III) CY APR 10-16, 1994 CL KAILUA KONA, HI SP Amer Nucl Soc, Div Isotopes & Radiat, Amer Nucl Soc, Div Biol & Med, Amer Nucl Soc, NO Calif Sect ID SPECTROSCOPY; FUEL AB A time-of-flight mass spectrometer has been designed and is presently being installed within a radiological controlled hot cell at Argonne National Laboratory-West. Direct solid sampling is performed by laser ablation or glow discharge sputtering followed by supersonic expansion into the TOFMS source chamber. Once the atom/ion beam enters the source chamber, enhanced ionization can be accomplished by laser ionization or electron impact. An assortment of samples may be analyzed ranging from irradiated nuclear fuel elements and cladding materials to eutectic salts, radioactive waste materials and environmental samples. RP FRANK, SM (reprint author), ARGONNE NATL LAB,POB 2528,IDAHO FALLS,ID 83402, USA. RI Frank, Steven/B-9046-2017 OI Frank, Steven/0000-0001-8259-6722 NR 15 TC 0 Z9 0 U1 1 U2 1 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH AR JI J. Radioanal. Nucl. Chem.-Artic. PD JUL PY 1995 VL 194 IS 1 BP 35 EP 39 DI 10.1007/BF02037610 PG 5 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA RH446 UT WOS:A1995RH44600004 ER EF