FN Thomson Reuters Web of Science™ VR 1.0 PT J AU BAIRD, W NOGAR, NS AF BAIRD, W NOGAR, NS TI COMPACT, SELF-CONTAINED OPTICAL SPECTROMETER SO APPLIED SPECTROSCOPY LA English DT Article DE OPTICAL SPECTROMETER; NEAR-INFRARED; PORTABLE SPECTROMETER; FLUORESCENCE; URANYL- ID MASS-SPECTROMETER; LAPTOP CHEMISTRY; LUMINESCENCE; SAMPLES; CONTAMINATION; PARAMETERS; DETECTOR; SENSOR; ACID AB We describe the construction and performance of a self-contained, battery-operated, hand-held optical spectrometer. This unit contains an onboard optical excitation source, miniaturized monochromator, CCD detector, Peltier cooler, LCD display module, and microprocessor control. We demonstrate capabilities for qualitative fluorescence determinations and semiquantitative fluorescence and absorption measurements. Resolution is lambda/delta lambda approximate to 1200 at 434 nm. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 39 TC 2 Z9 2 U1 0 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD NOV PY 1995 VL 49 IS 11 BP 1699 EP 1704 DI 10.1366/0003702953965812 PG 6 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA TG075 UT WOS:A1995TG07500021 ER PT J AU FAN, JL MCCORMICK, SPA KRAUSS, RM TAYLOR, S QUAN, R TAYLOR, JM YOUNG, SG AF FAN, JL MCCORMICK, SPA KRAUSS, RM TAYLOR, S QUAN, R TAYLOR, JM YOUNG, SG TI OVEREXPRESSION OF HUMAN APOLIPOPROTEIN B-100 IN TRANSGENIC RABBITS RESULTS IN INCREASED LEVELS OF LDL AND DECREASED LEVELS OF HDL SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Article DE CHOLESTEROL; APOLIPOPROTEIN B; TRANSGENIC RABBITS ID LOW-DENSITY LIPOPROTEIN; HERITABLE HYPERLIPIDEMIC RABBITS; CORONARY HEART-DISEASE; FAMILIAL HYPERCHOLESTEROLEMIA; HEREDITARY HYPERLIPIDEMIA; HEPATIC LIPASE; ANIMAL-MODEL; WHHL-RABBIT; PLASMA; ATHEROSCLEROSIS AB In this study, an SO-kb human genomic DNA fragment spanning the human apoB gene was used to generate transgenic New Zealand White rabbits that expressed human apoB-100;The concentration of human apoB in the plasma of the transgenic rabbits ranged between 5 and 100 mg/dL. The transgenic rabbits had nearly threefold elevations in the plasma levels of triglycerides and cholesterol compared with nontransgenic controls. Nearly all the cholesterol and human apoB in the plasma was in the LDL fraction. Pronounced triglyceride enrichment of the LDL fraction was a striking feature of human apoB overexpression in the transgenic rabbits, in which the LDL fraction contained more than 75% of the plasma triglycerides. The triglyceride-enriched LDL particles were smaller and more dense than the native rabbit LDL and contained markedly increased amounts of apoE and apoC-III. In the nontransgenic control animals most of the triglycerides were in the VLDL, and most of the apoE and apoC-III were in the VLDL and HDL fractions. In addition to increased LDL levels, overexpression of human apoB in rabbits resulted in lower plasma levels of HDL cholesterol and apoA-I. In our prior studies on transgenic mice expressing human apoB, we documented triglyceride-rich LDL and reduced,levels of HDL cholesterol. These prior findings in mice, together with the present findings in transgenic rabbits, suggest that triglyceride-rich LDL and lowered levels of HDL cholesterol may be hallmark features of apoB overexpression. C1 UNIV CALIF SAN FRANCISCO,GLADSTONE INST CARDIOVASC DIS,SAN FRANCISCO,CA 94141. UNIV CALIF SAN FRANCISCO,CARDIOVASC RES INST,SAN FRANCISCO,CA 94143. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. UNIV CALIF SAN FRANCISCO,DEPT PHYSIOL,SAN FRANCISCO,CA. UNIV CALIF SAN FRANCISCO,DEPT MED,SAN FRANCISCO,CA. FU NHLBI NIH HHS [HL 18754, HL 51588, HL 41633] NR 52 TC 45 Z9 48 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscl. Thromb. Vasc. Biol. PD NOV PY 1995 VL 15 IS 11 BP 1889 EP 1899 PG 11 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA TE625 UT WOS:A1995TE62500013 PM 7583569 ER PT J AU TRIBBLE, DL THIEL, PM VANDENBERG, JJM KRAUSS, RM AF TRIBBLE, DL THIEL, PM VANDENBERG, JJM KRAUSS, RM TI DIFFERING ALPHA-TOCOPHEROL OXIDATIVE LABILITY AND ASCORBIC-ACID SPARING EFFECTS IN BUOYANT AND DENSE LDL SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Article DE LIPOPROTEINS, LOW-DENSITY; ALPHA-TOCOPHEROL; ANTIOXIDANTS; ASCORBIC ACID; ATHEROSCLEROSIS ID VITAMIN-E; LIPID-PEROXIDATION; INDEPENDENT OXIDATION; PARTICLE-SIZE; LIPOPROTEIN; SUSCEPTIBILITY; ANTIOXIDANTS; CHOLESTEROL; PROOXIDANT; MEMBRANE AB The enhanced oxidizability of smaller, more dense LDL is explained in part by a lower content of antioxidants, including ubiquinol-10 and alpha-tocopherol. In the present studies, we also observed greater rates of depletion of alpha-tocopherol (mole per mole LDL per minute) in dense (d=1.040 to 1.054 g/mL) compared with buoyant (d=1.026 to 1.032 g/mL) LDL in the presence of either CU2+ or the radical-generating agent 2,2'-azobis(2-amidinopropane)dihydrochloride. Differences were particularly pronounced at the lowest Cu2+ concentration tested (0.25 mu mol/L), with a fivefold greater rate in dense LDL. At higher concentrations (1.0 and 2.5 mu mol/L Cu2+), there was a greater dependence of depletion rate on initial amount of alpha-tocopherol, which was reduced in dense LDL, thus resulting in smaller subfraction-dependent differences in depletion rates. Inclusion of ascorbic acid (15 mu mol/L), an aqueous antioxidant capable of recycling alpha-tocopherol by hydrogen donation, was found to extend the course of Cu2+-induced alpha-tocopherol depletion in both buoyant and dense LDL, but this effect was more pronounced in dense LDL (time to half-maximal alpha-tocopherol depletion was extended 15.6-fold and 21.2-fold in buoyant and dense LDL, respectively, at 2.5 mu mol/L Cu2+; P<.05). Thus, dense LDL exhibits more rapid alpha-tocopherol depletion and conjugated diene formation than buoyant LDL when oxidation is performed in the absence of ascorbic acid, but these differences are reversed in the presence of ascorbic acid. These results suggest that differences in oxidative behavior among LDL density subfractions may involve differences in antioxidant activity and thus that the efficacy of antioxidant regimens designed to inhibit LDL oxidation in vivo may vary in relation to interindividual variations in LDL particle distribution profiles. C1 CHILDRENS HOSP,OAKLAND RES INST,OAKLAND,CA 94609. RP TRIBBLE, DL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT MOLEC & NUCL MED,DIV LIFE SCI,DONNER LAB,ROOM 465,BERKELEY,CA 94720, USA. FU NHLBI NIH HHS [HL-18574] NR 35 TC 23 Z9 23 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscl. Thromb. Vasc. Biol. PD NOV PY 1995 VL 15 IS 11 BP 2025 EP 2031 PG 7 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA TE625 UT WOS:A1995TE62500029 PM 7583585 ER PT J AU CHAIZY, P PICK, M REINER, M ANDERSON, KA PHILLIPS, J FORSYTH, R AF CHAIZY, P PICK, M REINER, M ANDERSON, KA PHILLIPS, J FORSYTH, R TI PARTICLE EVENTS ASSOCIATED WITH LOCAL TYPE-III RADIO-EMISSION AND LANGMUIR-WAVES IN THE INTERPLANETARY MEDIUM SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE SUN, FLARES; SUN, MAGNETIC FIELDS; SUN, PARTICLE EMISSION; SUN, RADIO RADIATION; SOLAR WIND ID SOLAR ELECTRON EVENTS; ULYSSES; SCATTERING; BURSTS; WIND; 1-AU AB The first detection of local type III radio emissions at the fundamental and harmonic of the plasma frequency was made by the Ulysses spacecraft when it was in the ecliptic plane and between similar to 1.4 and similar to 2.2 AU from the Sun. In-situ Langmuir waves were observed simultaneously with each local radio event, indicating the presence of an electron beam at the spacecraft. We analyze the energetic electron (42-290 keV) and ion (60-5000 keV) fluxes measured by the HI-SCALE instrument on Ulysses and examine the magnetic field and plasma structures present in the interplanetary medium during the times of the three reported local type III events. An impulsive electron event was found to be associated with each of the local radio events. For two events, the electron fluxes were observed simultaneously in all energy channels, indicating that an interplanetary structure, with propagating energetic particles already present, convected past the spacecraft. One of these structures is seen in association with a magnetic cloud. The presence of energetic electrons of solar origin reveals that one end of the structure field lines on which they move was still magnetically connected to the Sun. However, the back streaming electrons present a loss cone with high angles (50 degrees-60 degrees) which indicates that the other side of the magnetic field lines cannot be rooted back at the Sun and are essentially opened into the outer heliosphere. The last observation indicates that the structure is either a substructure of the magnetic cloud or at;he edge of the cloud. The local fundamental and 2nd harmonic radiation and in-situ Langmuir waves were observed as Ulysses entered the cloud. For the third local type III event a velocity dispersion in the onset times of the energetic electrons was observed. The measured velocity dispersion was used to determine the ejection time of the electrons at the Sun and to estimate the lowest energy (8 +/- 3 keV) of the electrons at the spacecraft at the onset of the local radio emission. The minimum energy of the electrons associated with the other local radio events was estimated to be similar to 6 +/- 1 and 24 +/- 3 keV. These estimated minimum electron energies, associated with the production of in-situ Langmuir waves, are consistent with previous direct measurements by spacecraft at 1 AU. C1 EUROPEAN SPACE AGCY, ESTEC, DEPT SPACE SCI, 2200 AG NOORDWIJK, NETHERLANDS. UNIV CALIF BERKELEY, SPACE SCI LAB, BERKELEY, CA 94720 USA. OBSERV PARIS, URA 1756, F-92195 MEUDON, FRANCE. HUGHES STX, LANHAM, MD 20706 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. UNIV LONDON IMPERIAL COLL SCI & TECHNOL, BLACKETT LAB, LONDON SW7 2BZ, ENGLAND. NR 29 TC 7 Z9 7 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 NOV PY 1995 VL 303 IS 2 BP 583 EP 593 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TE384 UT WOS:A1995TE38400031 ER PT J AU FENIMORE, EE BLOOM, JS AF FENIMORE, EE BLOOM, JS TI DETERMINATION OF DISTANCE FROM TIME DILATION OF COSMOLOGICAL GAMMA-RAY BURSTS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMOLOGY, THEORY; GAMMA RAYS, BURSTS ID BATSE; ABSORPTION; FEATURES AB The isotropic distribution of gamma-ray bursts (GRBs) as observed with the Burst and Transient Source Experiment (BATSE) strongly suggests that the bursts are at cosmological distances. At such distances, the expansion of the universe should redshift the spectra and stretch the temporal structure. Indeed, such time dilation has been observed through a variety of analyses and over all observed timescales in gamma-ray bursts. We relate the observed peak intensities, spectral shapes, and time dilation to absolute distance. We include the uncertainties in our knowledge of the intrinsic spectrum and correct for the coupling between the spectral shape and the temporal structure. Assuming a q(0) = 1/2 cosmology, the reported time dilation between the dimmest BATSE bursts and the bright BATSE bursts (a factor of similar to 2) requires a standard candle luminosity of similar to 10(52) ergs s(-1), which translates into a redshift of >6 for the dimmest BATSE bursts rather than a redshift of 1 or 2, as previously reported. An alternative method to determine the distance to cosmological GRBs is to use the log N-log P distribution. The large luminosity and distance determined from the time dilation is inconsistent with the observed log N-log P distribution (which requires a luminosity of 4.6 x 10(50) ergs s(-1) and z similar to 0.8) unless there is very strong evolution. Cosmologies with q, not equal 1/2 give similar results. The implied distance for the dimmest bursts is beyond where galaxies are thought to form. If true, the gamma-ray bursts would be orphans: no known objects would have the same distance scale. We conclude that either a large fraction (65%) of the observed time dilation between the BATSE bright and dimmest bursts is intrinsic to the bursts or that there are strong evolutionary effects in the log N-log P distribution and that it is only a coincidence that log N-log P shows a -3/2 power law at high intensities. RP FENIMORE, EE (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 34 TC 70 Z9 72 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1995 VL 453 IS 1 BP 25 EP 36 DI 10.1086/176366 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TB033 UT WOS:A1995TB03300004 ER PT J AU HAWLEY, SL FISHER, GH SIMON, T CULLY, SL DEUSTUA, SE JABLONSKI, M JOHNSKRULL, CM PETTERSEN, BR SMITH, V SPIESMAN, WJ VALENTI, J AF HAWLEY, SL FISHER, GH SIMON, T CULLY, SL DEUSTUA, SE JABLONSKI, M JOHNSKRULL, CM PETTERSEN, BR SMITH, V SPIESMAN, WJ VALENTI, J TI SIMULTANEOUS EXTREME-ULTRAVIOLET EXPLORER AND OPTICAL OBSERVATIONS OF AD LEONIS - EVIDENCE FOR LARGE CORONAL LOOPS AND THE NEUPERT EFFECT IN STELLAR FLARES SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, CHROMOSPHERES; STARS, FLARE; STARS, INDIVIDUAL (AD LEONIS); ULTRAVIOLET, STARS ID WHITE-LIGHT FLARES; X-RAY EMISSION; SOLAR-FLARES; ROTATIONAL MODULATION; QUIESCENT EMISSION; IUE OBSERVATIONS; UV CETI; RS-CVN; STARS; RADIO AB We report on the first simultaneous Extreme-Ultraviolet Explorer (EUVE) and optical observations of flares on the dMe flare star AD Leonis. The data show the following features: 1. Two flares (one large and one of moderate size) of several hours duration were observed in the EUV wavelength range; 2. Flare emission observed in the optical precedes the emission seen with EUVE; 3. Several diminutions (DIMs) in the optical continuum were observed during the period of optical flare activity. To interpret these data, we develop a technique for deriving the coronal loop length from the observed rise and decay behavior of the EUV flare. The technique is generally applicable to existing and future coronal observations of stellar flares. We also determine the pressure, column depth, emission measure, loop cross-sectional area, and peak thermal energy during the two EUV flares, and the temperature, area coverage, and energy of the optical continuum emission. When the optical and coronal data are combined, we find convincing evidence of a stellar ''Neupert effect'' which is a strong signature of chromospheric evaporation models. We then argue that the known spatial correlation of white-light emission with hard X-ray emission in solar flares, and the identification of the hard X-ray emission with nonthermal bremsstrahlung produced by accelerated electrons, provides evidence that flare heating on dMe stars is produced by the same electron precipitation mechanism that is inferred to occur on the Sun. We provide a thorough picture of the physical processes that are operative during the largest EUV flare, compare and contrast this picture with the canonical solar flare model, and conclude that the coronal loop length may be the most important factor in determining the flare rise time and energetics. C1 UNIV CALIF BERKELEY, SPACE SCI LAB, BERKELEY, CA 94720 USA. UNIV HAWAII, INST ASTRON, HONOLULU, HI 96822 USA. LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, LIVERMORE, CA 94551 USA. UNIV OSLO, INST THEORET ASTROPHYS, N-0315 OSLO, NORWAY. UNIV TEXAS, MCDONALD OBSERV, AUSTIN, TX 78712 USA. NORWEGIAN MAPPING AUTHOR, INST GEODET, N-3500 HONEFOSS, NORWAY. UNIV TEXAS, DEPT ASTRON, AUSTIN, TX 78712 USA. UNIV COLORADO, JOINT INST LAB ASTROPHYS, BOULDER, CO 80309 USA. RP MICHIGAN STATE UNIV, DEPT PHYS & ASTRON, E LANSING, MI 48824 USA. RI Fisher, George/G-1380-2015 OI Fisher, George/0000-0002-6912-5704 NR 82 TC 100 Z9 101 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD NOV 1 PY 1995 VL 453 IS 1 BP 464 EP 479 DI 10.1086/176408 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TB033 UT WOS:A1995TB03300046 ER PT J AU WOOSLEY, SE WEAVER, TA AF WOOSLEY, SE WEAVER, TA TI THE EVOLUTION AND EXPLOSION OF MASSIVE STARS .2. EXPLOSIVE HYDRODYNAMICS AND NUCLEOSYNTHESIS SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Article DE HYDRODYNAMICS; NUCLEAR REACTIONS, NUCLEOSYNTHESIS, ABUNDANCES; STARS, EVOLUTION STARS, INTERIORS; STARS, SUPERNOVAE, GENERAL ID RAYLEIGH-TAYLOR INSTABILITIES; THERMONUCLEAR REACTION-RATES; WEAK-INTERACTION RATES; P-PROCESS; PRESUPERNOVA MODELS; SUPERNOVA; SN-1987A; NUCLEI; METALLICITY; EJECTA AB The nucleosynthetic yield of isotopes lighter than A = 66 (zinc) is determined for a grid of stellar masses and metallicities including stars of 11, 12, 13, 15, 18, 19, 20, 22, 25, 30, 35, and 40 M(.) and metallicities Z = 0, 10(-4), 0.01, 0.1, and 1 times solar (a slightly reduced mass grid is employed for nonsolar metallicities). Altogether 78 different model supernova explosions are calculated. In each case nucleosynthesis has already been determined for 200 isotopes in each of 600 to 1200 zones of the presupernova star, including the effects of time dependent convection. Here each star is exploded using a piston to give a specified final kinetic energy at infinity (typically 1.2 X 10(51) ergs), and the explosive modifications to the nucleosynthesis, including the effects of neutrino irradiation, determined. A single value of the critical C-12(alpha, gamma)O-16 reaction rate corresponding to S(300 keV) = 170 keV barns is used in all calculations. The synthesis of each isotope is discussed along with its sensitivity to model parameters. In each case, the final mass of the collapsed remnant is also determined and often found not to correspond to the location of the piston (typically the edge of the iron core), but to a ''mass cut'' farther out. This mass cut is sensitive not only to the explosion energy, but also to the presupernova structure, stellar mass, and the metallicity. Unless the explosion mechanism, for unknown reasons, provides a much larger characteristic energy in more massive stars, it appears likely that stars larger than about 30 M(.) will experience considerable reimplosion of heavy elements following the initial launch of a successful shock. While such explosions will produce a viable, bright Type II supernova light curve, lacking perhaps the radioactive tail, they will have dramatically reduced yields of heavy elements and may leave black hole remnants of up to 10 and more solar masses. The production of black holes may be particularly favored for stars of low metallicity, both because of their more compact structure and reduced mass loss. C1 LAWRENCE LIVERMORE NATL LAB,DIV GEN STUDIES,LIVERMORE,CA 94550. RP WOOSLEY, SE (reprint author), UNIV CALIF SANTA CRUZ,UNIV CALIF OBSERV,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064, USA. NR 90 TC 2459 Z9 2476 U1 9 U2 95 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 NOV PY 1995 VL 101 IS 1 BP 181 EP 235 DI 10.1086/192237 PG 55 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RZ600 UT WOS:A1995RZ60000007 ER PT J AU WILLIAMS, MD BROWN, MJ CRUZ, X SOSA, G STREIT, G AF WILLIAMS, MD BROWN, MJ CRUZ, X SOSA, G STREIT, G TI DEVELOPMENT AND TESTING OF METEOROLOGY AND AIR DISPERSION MODELS FOR MEXICO-CITY SO ATMOSPHERIC ENVIRONMENT LA English DT Article; Proceedings Paper CT International Specialty Conference on Regional Photochemical Measurement and Modeling Studies CY NOV 08-12, 1993 CL SAN DIEGO, CA SP Air & Waste Management Assoc, Amer Meteorol Soc, Amer Geophys Union, Amer Chem Soc, Div Environm Chem, Amer Assoc Aerosol Res DE PROGNOSTIC MODELS; COMPLEX TERRAIN; URBAN AIR QUALITY; MEASUREMENT-MODEL COMPARISON; MEXICO CITY AB Los Alamos National Laboratory and Institute Mexicano del Petroleo are completing a joint study of options for improving air quality in Mexico City. We have modified a three-dimensional, prognostic: higher-order turbulence model for atmospheric circulation (HOTMAC) and a Monte Carlo dispersion and transport model (RAPTAD) to treat domains that include an urbanized area. We used the meteorological model to drive models which describe the photochemistry and air transport and dispersion. The photochemistry modeling is described in a separate paper. We tested the model against routine measurements and those of a major field program. During the field program, measurements included: (1) lidar measurements of aerosol transport and dispersion, (2) aircraft measurements of winds, turbulence, and chemical species aloft, (3) aircraft measurements of skin temperatures, and (4) Tethersonde measurements of winds and ozone. We modified the meteorological model to include provisions for time-varying synoptic-scale winds, adjustments for local wind effects, and detailed surface-coverage descriptions. We developed a new method to define mixing-layer heights based on model outputs. The meteorology and dispersion models were able to provide reasonable representations of the measurements and to define the sources of some of the major uncertainties in the model-measurement comparisons. C1 INST MEXICANO PETR,MEXICO CITY 07730,DF,MEXICO. RP WILLIAMS, MD (reprint author), LOS ALAMOS NATL LAB,MAIL STOP B299,LOS ALAMOS,NM 87545, USA. RI Sosa, Gustavo/F-3912-2015; OI Sosa, Gustavo/0000-0002-4980-3491; Brown, Michael J./0000-0002-8069-0835 NR 13 TC 26 Z9 27 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1995 VL 29 IS 21 BP 2929 EP 2960 DI 10.1016/1352-2310(95)00113-D PG 32 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA TE894 UT WOS:A1995TE89400006 ER PT J AU SILLMAN, S ALWALI, KI MARSIK, FJ NOWACKI, P SAMSON, PJ RODGERS, MO GARLAND, LJ MARTINEZ, JE STONEKING, C IMHOFF, R LEE, JH NEWMAN, L WEINSTEINLLOYD, J ANEJA, VP AF SILLMAN, S ALWALI, KI MARSIK, FJ NOWACKI, P SAMSON, PJ RODGERS, MO GARLAND, LJ MARTINEZ, JE STONEKING, C IMHOFF, R LEE, JH NEWMAN, L WEINSTEINLLOYD, J ANEJA, VP TI PHOTOCHEMISTRY OF OZONE FORMATION IN ATLANTA, GA - MODELS AND MEASUREMENTS SO ATMOSPHERIC ENVIRONMENT LA English DT Article; Proceedings Paper CT International Specialty Conference on Regional Photochemical Measurement and Modeling Studies CY NOV 08-12, 1993 CL SAN DIEGO, CA SP Air & Waste Management Assoc, Amer Meteorol Soc, Amer Geophys Union, Amer Chem Soc, Div Environm Chem, Amer Assoc Aerosol Res DE OZONE; NITROGEN OXIDES; HYDROCARBONS; PHOTOCHEMICAL SMOG; HYDROGEN; PEROXIDE ID AMBIENT LEVELS; PEROXYACETYL NITRATE; SOUTHERN CALIFORNIA; UNITED-STATES; HYDROCARBONS; ATMOSPHERE; URBAN; AIR; HYDROPEROXIDES; FORMALDEHYDE AB Chemical measurements made during an air pollution event in Atlanta, GA have been compared with results from several photochemical simulations. Measurements included O-3, primary reactive organic gases (ROG), aldehydes, PAN, total reactive nitrogen (NOy) and H2O2, with vertical profiles for primary ROG. Photochemical models using two different chemical representations and a range of assumptions about winds, vertical mixing and emissions were used to simulate the event. Results show that assumptions about vertical mixing can cause a variation in simulated surface concentrations of primary hydrocarbons of a factor of two or more. A tendency to underestimate isoprene was found in comparison with measured vertical profiles. The models tend to overestimate concentrations of HCHO, H2O2 and PAN in comparison with measurements. Peak O-3 and concurrent NOy from helicopter measurements was used as a basis for evaluating individual model scenarios. Scenarios were developed with different O-3-NOx-ROG sensitivity,but only the NOx-sensitive scenarios are consistent with measured O-3, NOy and isoprene. C1 GEORGIA INST TECHNOL,SCH EARTH & ATMOSPHER SCI,ATLANTA,GA 30332. TENNESSEE VALLEY AUTHOR,MUSCLE SHOALS,AL 35630. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. SUNY COLL OLD WESTBURY,DEPT CHEM,OLD WESTBURY,NY 11568. N CAROLINA STATE UNIV,DEPT MARINE EARTH & ATMOSPHER SCI,RALEIGH,NC 27695. RP SILLMAN, S (reprint author), UNIV MICHIGAN,DEPT ATMOSPHER OCEAN & SPACE SCI,ANN ARBOR,MI 48109, USA. OI Sillman, Sanford/0000-0001-6250-1191 NR 55 TC 49 Z9 55 U1 2 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD NOV PY 1995 VL 29 IS 21 BP 3055 EP 3066 DI 10.1016/1352-2310(95)00217-M PG 12 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA TE894 UT WOS:A1995TE89400014 ER PT J AU Kaeding, TA AF Kaeding, TA TI Tables of SU(3) isoscalar factors SO ATOMIC DATA AND NUCLEAR DATA TABLES LA English DT Article AB The Clebsch-Gordan coefficients of SU(3) are useful in calculations involving baryons and mesons, as well as in calculations involving arbitrary numbers of quarks. For the latter case, one needs the coupling constants between states of nonintegral hypercharges. The existing published tables are insufficient for many such applications, and therefore this collection has been compiled. This report supplies the isoscalar factors required to reconstruct the Clebsch-Gordan coefficients for a large set of products of representations. (C) 1995 Academic Press, Inc. RP Kaeding, TA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0092-640X J9 ATOM DATA NUCL DATA JI Atom. Data Nucl. Data Tables PD NOV PY 1995 VL 61 IS 2 BP 233 EP 288 DI 10.1006/adnd.1995.1011 PG 56 WC Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Physics GA TL686 UT WOS:A1995TL68600002 ER PT J AU CHILKOTI, A SCHWARTZ, BL SMITH, RD LONG, CJ STAYTON, PS AF CHILKOTI, A SCHWARTZ, BL SMITH, RD LONG, CJ STAYTON, PS TI ENGINEERED CHIMERIC STREPTAVIDIN TETRAMERS AS NOVEL TOOLS FOR BIOSEPARATIONS AND DRUG-DELIVERY SO BIO-TECHNOLOGY LA English DT Article ID AVIDIN-BIOTIN TECHNOLOGY; TRANSFER RNA-SYNTHETASE; SUBUNITS AB We report the construction of chimeric streptavidin tetramers that are composed of subunits of both wild-type (WT) streptavidin and genetically-engineered streptavidin variants designed for enhanced bioseparation and drug delivery performance, Subunit mixing is accomplished by guanidine thiocyanate-induced denaturation of an equimolar mixture of WT streptavidin and the respective site-directed mutant, followed by renaturation and reassociation of mixed tetramers, In the first example, we demonstrate the mixing of WT subunits with an Asn49Cys (N49C) mutant, The WT/N49C tetramers can be used for site-specific and stoichiometric attachment of therapeutics/imaging agents or targeting proteins through the genetically-engineered thiol while retaining unhindered access to biotin-binding at the WT subunits, Second, we demonstrate that the His127Cys mutation (H127C) results in a streptavidin mutant that forms a disulfide-linked dimer under non-reducing conditions, Mixing of H127C and WT streptavidin subunits results in chimeric tetramers where both the stoichiometry (WT:H127C::1:1) and subunit architecture is controlled by the unique disulfide bridge engineered into H127C. In the third example, WT subunits were mixed with the subunits of a site-directed mutant, Trp120Ala (W120A), which displays a biotin dissociation constant that is enhanced by more than 10(4) compared to WT streptavidin, The W120A biotin-binding affinity is sufficiently high (K-a approximate to 10(7) M(-1)) to immobilize the mutant on a biotin-agarose affinity chromatography column, but the engineered off-rate allows for facile elution with excess biotin at physiological pH, whereas WT streptavidin is irreversibly immobilized on the column, We demonstrate that the purified WT/W120A chimeric tetramers combine the advantages of both subunits, allowing for irreversible immobilization of biotinylated targets at the WT subunit, while retaining the reversible separation capabilities of the W120A subunits via biotin-agarose affinity chromatography. C1 UNIV WASHINGTON, CTR BIOENGN, MOLEC BIOENGN PROGRAM, SEATTLE, WA 98195 USA. PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 33 TC 44 Z9 45 U1 0 U2 2 PU NATURE PUBLISHING CO PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 SN 0733-222X J9 BIO-TECHNOL JI Bio-Technology PD NOV PY 1995 VL 13 IS 11 BP 1198 EP 1204 DI 10.1038/nbt1195-1198 PG 7 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA TD752 UT WOS:A1995TD75200024 PM 9636292 ER PT J AU Ramakrishnan, V Davies, C Gerchman, SE Golden, BL Hoffmann, DW Jaishree, TN Kycia, JH Porter, S White, SW AF Ramakrishnan, V Davies, C Gerchman, SE Golden, BL Hoffmann, DW Jaishree, TN Kycia, JH Porter, S White, SW TI Structures of prokaryotic ribosomal proteins: Implications for RNA binding and evolution SO BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE LA English DT Article; Proceedings Paper CT International Conference on the Structure and Function of the Ribosome CY MAY 20-25, 1995 CL VICTORIA, CANADA SP Int Union Biochem & Molec Biol, Nat Sci & Engn Res Council Canada, Med Res Council Canada, Natl Sci Fdn, NIH, US, Int Fed Cell Biol, Univ Victoria DE ribosome; ribosomal proteins; ribosomal RNA; X-ray crystallography; NMR ID ESCHERICHIA-COLI; CRYSTAL-STRUCTURE; 3-DIMENSIONAL STRUCTURE; RESOLUTION; COMPONENT; SUBUNIT; DOMAIN; MODEL; SITES; GENES AB After a long hiatus, the pace of determination of the structures of ribosomal proteins has accelerated dramatically. We discuss here the structures of five ribosomal proteins from Bacillus stearothermophilus: S5, S17, L6, L9, and L14. These structures represent several new motifs. Each of these structures has revealed new insights, and we have developed criteria for recognizing RNA-binding regions of each protein and correlating the structures with such properties as antibiotic resistance. The information here should also prove invaluable in an eventual high-resolution picture of the intact ribosome. C1 DUKE UNIV,MED CTR,DEPT MICROBIOL,DURHAM,NC 27710. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. OI Golden, Barbara/0000-0002-9741-882X; Ramakrishnan, V/0000-0002-4699-2194 FU NIGMS NIH HHS [GM 44973] NR 30 TC 25 Z9 27 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 NOV-DEC PY 1995 VL 73 IS 11-12 BP 979 EP 986 PG 8 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA UE603 UT WOS:A1995UE60300025 PM 8722013 ER PT J AU SUH, M ARIESE, F SMALL, GJ JANKOWIAK, R LIU, TM GEACINTOV, NE AF SUH, M ARIESE, F SMALL, GJ JANKOWIAK, R LIU, TM GEACINTOV, NE TI CONFORMATIONAL STUDIES OF THE (+)-TRANS-ADDUCTS, (-)-TRANS-ADDUCTS, (+)-CIS-ADDUCTS, AND (-)-CIS-ADDUCTS OF ANTI-BENZO[A]PYRENE DIOLEPOXIDE TO N-2-DG IN DUPLEX OLIGONUCLEOTIDES USING POLYACRYLAMIDE-GEL ELECTROPHORESIS AND LOW-TEMPERATURE FLUORESCENCE SPECTROSCOPY SO BIOPHYSICAL CHEMISTRY LA English DT Article DE BENZO[A]PYRENE; BPDE ADDUCTS; POLYACRYLAMIDE GEL ELECTROPHORESIS; FLUORESCENCE SPECTROSCOPY ID DIASTEREOMERIC BENZOPYRENE 7,8-DIOL-9,10-EPOXIDES; DNA-ADDUCTS; DIOL EPOXIDE; OPTICAL ENANTIOMERS; (+)-ANTI-DIOL EPOXIDE; MUTAGENIC SPECIFICITY; MAMMALIAN-CELLS; IDENTIFICATION; STEREOISOMERS; 9,10-EPOXIDES AB Using polyacrylamide gel electrophoresis (PAGE) and low-temperature, laser-induced fluorescence line narrowing (FLN) and non-line narrowing (NLN) spectroscopic methods, the conformational characteristics of stereochemically defined and site-specific adducts derived from the binding of 7 beta,8 alpha-dihydroxy-9 alpha,10 alpha-epoxy-7,8,9,10-tetrahydrobenzo[a]pyrene (anti-BPDE, a metabolite of the environmental carcinogen benzo[a]pyrene), to DNA were studied. The focus of these studies was on the four stereochemically distinct anti-BPDE modified duplexes 5'-d(CCATCGCTACC).(GGTAGCGATGG), where G denotes the lesion site derived from trans or cis addition of the exocyclic amino group of guanine to the C10 position of either(+) or(-)-anti-BPDE. PAGE experiments under non-denaturing conditions showed that the(+)-trans adduct causes a significantly greater retardation in the electrophoretic mobility than the other three adducts, probably the result of important adduct-induced distortions of the duplex structure, Low-temperature fluorescence studies in frozen aqueous buffer matrices showed that the(+)-trans adduct adopts primarily an external conformation with only minor interactions with the helix, but a smaller fraction(similar to 25%) appears to exists in a partially base-stacked conformation. The(-)-trans adduct exists almost exclusively (similar to 97%) in an external conformation. Both cis adducts were found to be intercalated; strong electron-phonon coupling observed in their FLN spectra provided additional evidence for significant pi-pi stacking interactions between the pyrenyl residues and the bases. FLN spectroscopy is shown to be suitable for distinguishing between trans and cis adducts, but lesions with either(+)- or (-)-trans, or (+)- or (-)-cis stereochemical characteristics showed very similar vibrational patterns. Addition of glycerol (50%, v/v) to the matrix caused a partial disruption of the chromophore-base stacking interactions for most adducts, but the (-)-cis isomer showed a strong blue-shift and unusual vibrational frequencies. Low-temperature fluorescence spectroscopy techniques are most suitable for distinguishing between different conformational benzo[a]pyrene diol epoxide-DNA adduct types; because of the sensitivity of these methods, they may provide important information necessary for an understanding of the biological effects of the stereochemically distinct BPDE-guanine lesions. C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NYU,DEPT CHEM,NEW YORK,NY 10003. NR 42 TC 48 Z9 48 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-4622 J9 BIOPHYS CHEM JI Biophys. Chem. PD NOV PY 1995 VL 56 IS 3 BP 281 EP 296 DI 10.1016/0301-4622(95)00055-3 PG 16 WC Biochemistry & Molecular Biology; Biophysics; Chemistry, Physical SC Biochemistry & Molecular Biology; Biophysics; Chemistry GA TB193 UT WOS:A1995TB19300007 PM 7578905 ER PT J AU Hong, M Schmidt-Rohr, K Nanz, D AF Hong, M Schmidt-Rohr, K Nanz, D TI Study of phospholipid structure by H-1, C-13, P-31 dipolar couplings from two-dimensional NMR SO BIOPHYSICAL JOURNAL LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; CHEMICAL-SHIFT ANISOTROPIES; ANGLE-SPINNING NMR; CHOLINE HEAD GROUP; PHOSPHATIDYLCHOLINE BILAYERS; CORRELATION SPECTROSCOPY; MOLECULAR-DYNAMICS; MEMBRANE STRUCTURE; LIPID BILAYERS; CONFORMATION AB Various motionally averaged P-31-H-1, C-13-H-1, H-1-H-1 and P-31-C-13 dipolar couplings were measured for natural-abundance and unoriented phosphocholine in the L(alpha) phase. The couplings were obtained and assigned by a variety of advanced and partly novel two-dimensional solid-state NMR experiments. Whereas P-31-H-1 and P-31-C-13 dipolar couplings provide long-range structural constraints, geminal H-1-H-1 couplings and the signs of C-13-H-1 couplings are important new elements in a segmental order-tenser analysis of the lipid headgroup and glycerol backbone. The implications of these measured dipolar couplings for the conformational exchange of the lipid headgroup and the bending of the headgroup from the glycerol backbone are discussed. These dipolar couplings are also analyzed semiquantitatively in terms of the segmental order tenser. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP Hong, M (reprint author), UNIV CALIF BERKELEY, DEPT CHEM, PINE RES GRP, BERKELEY, CA 94720 USA. RI Nanz, Daniel/A-9889-2012 NR 40 TC 53 Z9 53 U1 2 U2 12 PU CELL PRESS PI CAMBRIDGE PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD NOV PY 1995 VL 69 IS 5 BP 1939 EP 1950 PG 12 WC Biophysics SC Biophysics GA TV017 UT WOS:A1995TV01700031 PM 8580337 ER PT J AU WILKINSON, D SANDHU, JK BRENEMAN, JW TUCKER, JD BIRNBOIM, HC AF WILKINSON, D SANDHU, JK BRENEMAN, JW TUCKER, JD BIRNBOIM, HC TI HPRT MUTANTS IN A TRANSPLANTABLE MURINE TUMOR ARISE MORE FREQUENTLY IN-VIVO THAN IN-VITRO SO BRITISH JOURNAL OF CANCER LA English DT Article DE HPRT GENE; MC1A-C1 FIBROSARCOMA; TRANSPLANTABLE TUMOR ID CHINESE-HAMSTER CELLS; MAMMALIAN CHROMOSOMAL DNA; MOUSE LYMPHOMA-CELLS; GENE AMPLIFICATION; MOLECULAR ANALYSIS; SPONTANEOUS MUTATION; OXYGEN RADICALS; LARGE DELETIONS; SHUTTLE VECTOR; LOCUS AB A model system was developed to allow investigation of the frequency at which clastogenic and/or mutagenic events occur in situ in a transplantable murine fibrosarcoma tumour (MC1A-C1) compared with in vitro culture. The marker selected for detecting these events was the X-linked hprt (hypoxanthine-guanine phosphoribosyltransferase) gene. We found that the hprt gene in MC1A-C1 was not suitable for this purpose, most likely because multiple active copies were present. To circumvent the problem, HPRT(-)[6-thioguanine (6-TG)-resistant] clones were isolated by inactivating all hprt genes with methylnitrosourea. Spontaneous revertants to hypoxanthine/aminopterin/thymidine resistance (HAT(R)) were isolated and found to be approximately 1000 times more sensitive than the parental tumour to induction of 6-TG(R) mutants by cobalt-60 gamma-rays. This sensitivity is expected for a heterozygous marker; these revertants may therefore possess only one functional hprt locus but two or more active X chromosomes. A clone with a stable hprt gene was identified and a neo gene was introduced. The resulting cell line (MN-11) could be grown as a subcutaneous tumour in syngeneic C57BL/6 animals. The frequency of mutations arising in vivo in the marker hprt gene could be estimated by culturing explanted tumour cells in the presence of 6-TG, using G418 selection to distinguish tumour from host cells. The frequency of mutants in MN-II cells grown as tumours was found to be 3.4-fold higher than in tissue culture for an equivalent period of time. These data provide the first direct evidence for the existence of mutagenic factors in a tumour environment that might contribute to tumour progression. C1 OTTAWA REG CANC CTR,OTTAWA,ON K1H 8L6,CANADA. UNIV OTTAWA,DEPT IMMUNOL & MICROBIOL,OTTAWA,ON,CANADA. LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. NR 58 TC 28 Z9 28 U1 0 U2 0 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0007-0920 J9 BRIT J CANCER JI Br. J. Cancer PD NOV PY 1995 VL 72 IS 5 BP 1234 EP 1240 DI 10.1038/bjc.1995.492 PG 7 WC Oncology SC Oncology GA TC820 UT WOS:A1995TC82000028 PM 7577474 ER PT J AU SULZER, B WEISBUCH, G AF SULZER, B WEISBUCH, G TI IDIOTYPIC REGULATION OF B-CELL DIFFERENTIATION SO BULLETIN OF MATHEMATICAL BIOLOGY LA English DT Article ID IMMUNE NETWORK; SELECTION; COMPETITION; DYNAMICS; SYSTEM AB We study the equilibrium properties of idiotypically interacting B cell clones in the case where only the differentiation of B cells is affected by idiotypic interactions. Furthermore, we assume that clones may recognize and be stimulated by self antigen in the same fashion as by anti-antibodies. For idiotypically interacting pairs of non-autoreactive clones we observe three qualitatively different dynamical regimes. In the first regime, at small antibody production an antibody-free fixed point, the virgin state, is the only attractor of the system. For intermediate antibody production, a symmetric activated state replaces the virgin state as the only attractor of the system. For large antibody production, finally, the symmetric activated state gives way to two asymmetric activated states where one clone suppresses the other clone. If one or both clones in the pair are autoreactive there is no virgin state. However, we still observe the switch from an almost symmetric activated state to two asymmetric activated states. The two asymmetric activated states at high antibody production have profoundly different implications for a self antigen which is recognized by one of the clones of the pair. In the attractor characterized by high autoantibody concentration the self antigen is attacked vigorously by the immune system while in the opposite steady state the tiny amount of autoantibody hardly affects the self antigen. Accordingly, we call the first state the autoimmune state and the second the tolerant state. In the tolerant state the autoreactive clone is down-regulated by its anti-idiotype providing an efficient mechanism to prevent an autoimmune reaction. However, the antibody production required to achieve this anti-idiotypic control of autoantibodies is rather large. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. ECOLE NORMALE SUPER,PHYS STAT LAB,F-75231 PARIS 5,FRANCE. RP SULZER, B (reprint author), SANTE FE INST,1399 HYDE PK RD,SANTA FE,NM 87501, USA. NR 23 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 0092-8240 J9 B MATH BIOL JI Bull. Math. Biol. PD NOV PY 1995 VL 57 IS 6 BP 841 EP 864 DI 10.1016/S0092-8240(95)80003-4 PG 24 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA TJ698 UT WOS:A1995TJ69800003 PM 8528158 ER PT J AU ALBRIGHT, D KELLEY, R AF ALBRIGHT, D KELLEY, R TI HAS IRAQ COME CLEAN AT LAST SO BULLETIN OF THE ATOMIC SCIENTISTS LA English DT Article C1 LOS ALAMOS NATL LAB,NUCL RESPONSE PROGRAMS,LOS ALAMOS,NM. RP ALBRIGHT, D (reprint author), INST SCI & IND SECUR,WASHINGTON,DC, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU EDUC FOUNDATION NUCLEAR SCI PI CHICAGO PA 6042 SOUTH KIMBARK, CHICAGO, IL 60637 SN 0096-3402 J9 B ATOM SCI JI Bull. Atom. Scient. PD NOV-DEC PY 1995 VL 51 IS 6 BP 53 EP & PG 0 WC International Relations; Social Issues SC International Relations; Social Issues GA TA596 UT WOS:A1995TA59600013 ER PT J AU ALVAREZ, MA KITTS, CL BOTSFORD, JL UNKEFER, PJ AF ALVAREZ, MA KITTS, CL BOTSFORD, JL UNKEFER, PJ TI PSEUDOMONAS-AERUGINOSA STRAIN MAO1 AEROBICALLY METABOLIZES THE AMINODINITROTOLUENES PRODUCED BY 2,4,6-TRINITROTOLUENE NITRO-GROUP REDUCTION SO CANADIAN JOURNAL OF MICROBIOLOGY LA English DT Article DE 2,4,6-TRINITROTOLUENE; AMINODINITROTOLUENE; PSEUDOMONAS AERUGINOSA; COMETABOLISM ID NITROAROMATIC COMPOUNDS; MICROBIAL TRANSFORMATION; PHANEROCHAETE-CHRYSOSPORIUM; 2,4-DINITROTOLUENE; NITROREDUCTASE; BIODEGRADATION; PURIFICATION; DEGRADATION; NITROPHENOL; OXIDATION AB Many microbes reduce the nitro substituents of 2,4,6-trinitrotoluene (TNT), producing aminodinitrotoluenes (ADNTs). These compounds are recalcitrant to further breakdown and are acutely toxic. In a search for organisms capable of metabolizing ADNTs, a bacterial strain was isolated for the ability to use 2-aminobenzoate (anthranilate) as sole C-source. This isolate, Pseudomonas aeruginosa MA01, metabolized TNT by first reducing one nitro group to form either 2-amino-4,6-dinitrotoluene (2ADNT) or 4-amino-2,6-dinitrotoluene (4ADNT). However, strain MA01 was distinct from other TNT-reducing organisms in that it transformed these compounds into highly polar metabolites through an O-2-dependent process. Strain MA01 was able to cometabolize TNT, 2ADNT, and 4ADNT in the presence of a variety of carbon and energy sources. During aerobic cometabolism with succinate, 45% of uniformly ring-labeled [C-14]TNT was transformed to highly polar compounds. Aerobic cometabolism of purified [C-14]2ADNT and [C-14]4ADNT with succinate as C-source produced similar amounts of these polar metabolites. During O-2-limited cometabolism with succinate as C-source and nitrate as electron acceptor, less than 8% of the [C-14]TNT was transformed to polar metabolites. Purified 2,6-diamino-4-nitrotoluene was not metabolized, and while 2,4-diamino-6-nitrotoluene was acetylated, the product (N-acetyl-2,4 -diamino-6-nitrotoluene) was not further metabolized. Therefore, strain MA01 metabolized TNT by oxidation of the ADNTs and not by reduction the remaining nitro groups on the ADNTs. C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. NEW MEXICO STATE UNIV,DEPT BIOL,LAS CRUCES,NM 88003. NR 31 TC 31 Z9 36 U1 0 U2 0 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0008-4166 J9 CAN J MICROBIOL JI Can. J. Microbiol. PD NOV PY 1995 VL 41 IS 11 BP 984 EP 991 PG 8 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Immunology; Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Immunology; Microbiology GA TF934 UT WOS:A1995TF93400005 PM 7497356 ER PT J AU WOLOSCHAK, GE PAUNESKU, T CHANGLIU, CM GRDINA, DJ AF WOLOSCHAK, GE PAUNESKU, T CHANGLIU, CM GRDINA, DJ TI EXPRESSION OF THYMIDINE KINASE MESSENGER-RNA AND A RELATED TRANSCRIPT IS MODULATED BY RADIOPROTECTOR WR1065 SO CANCER RESEARCH LA English DT Note ID PHOSPHORIBOSYL TRANSFERASE LOCUS; CELL-CYCLE PROGRESSION; IONIZING-RADIATION; S-2-(3-AMINOPROPYLAMINO)-ETHYLPHOSPHOROTHIOIC ACID; DIFFERENTIAL DISPLAY; MOLECULAR-CLONING; INDUCED MUTATIONS; GENE-EXPRESSION; GAMMA-RAYS; DNA DAMAGE AB Previous studies have shown that the radioprotector WR1065 protects against mutagenesis across a wide concentration range (i.e., 40 mu M to 4 mM) but protects against cell killing by ionizing radiation at concentrations greater than 1 mM. Other work has demonstrated that many genes are induced or repressed after exposure of cells in culture to ionizing radiation, but the actual inducing agents for this gene modulation response are unknown. In these experiments, we set out to identify genes that would be modulated in response to two different concentrations of WR1065 (i.e., a lower dose that is incapable of protecting against cell killing but effective in protecting against mutation induction, and a high dose that is effective in protecting against both end points). Using differential display reverse transcription-PCR, we compared genes expressed in untreated cells to those expressed in cells treated with different concentrations of WR1065 (4 mM or 40 mu M) with or without radiation exposure (7.5 Gy). One band, which showed a differential response, was sequenced and found to have homology in the 3'-untranslated region of the mouse thymidine kinase (tk) gene but not identity to the Chinese hamster ovary tk gene. Dot blot and Northern blot analyses confirmed the differential display results and also determined that regulation of the tk-like gene is similar to that of tk itself. These experiments established that in Chinese hamster ovary cells, radiation causes a repression in accumulation of tie mRNA and a related tk-like transcript. This repression Is made less dramatic by the presence of 40 mu M WR1065, and, in fact, expression becomes enhanced when cells are pretreated with 4 mM WR1065. This suggests a role for regulation of tk and its related gene in the survival response of cells after exposure to ionizing radiation. RP WOLOSCHAK, GE (reprint author), ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Paunesku, Tatjana/A-3488-2017; Woloschak, Gayle/A-3799-2017 OI Paunesku, Tatjana/0000-0001-8698-2938; Woloschak, Gayle/0000-0001-9209-8954 NR 46 TC 22 Z9 22 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA SN 0008-5472 J9 CANCER RES JI Cancer Res. PD NOV 1 PY 1995 VL 55 IS 21 BP 4788 EP 4792 PG 5 WC Oncology SC Oncology GA TC468 UT WOS:A1995TC46800011 PM 7585506 ER PT J AU WHARTON, W AF WHARTON, W TI CELL-CYCLE CONSTRAINTS ON PEROXIDE-INDUCED AND RADIATION-INDUCED INHIBITORY CHECKPOINTS SO CANCER RESEARCH LA English DT Article ID IONIZING-RADIATION; MAMMALIAN-CELLS; DNA DAMAGE; MESSENGER-RNA; KAPPA-B; EXPRESSION; PROTEIN; ACTIVATION; METALLOTHIONEIN; FIBROBLASTS AB The growth of human skin fibroblasts was reduced in a dose-dependent manner after either treatment with hydrogen peroxide or exposure to ionizing radiation. Serum-starved cells were markedly responsive to the inhibitory properties of large doses of either agent at any time during the first 12-14 h after restimulation. In contrast, when logarithmically growing cells were treated with hydrogen peroxide, a large percentage of G(1) cells synchronously traversed S phase in a wave that appeared after a 3-4 h delay, with a population of these cells eventually arresting in tate S and G(2). An analogous compartment of cells exiting G(1) was not obvious when logarithmically growing cells were treated with ionizing radiation alone. However, when irradiated cells were subsequently treated for 4 h with aphidicolin to depress ongoing DNA synthesis to the levels seen in cultures treated with peroxide, a similar pattern of cells synchronously exiting G, was seen. Therefore, although cells between G(0) and S had a marked sensitivity to the inhibitory effects of either peroxide or radiation, logarithmically growing cells in G(1) between hi and S were far less susceptible to either type of growth inhibition. RP WHARTON, W (reprint author), LOS ALAMOS NATL LAB,DIV LIFE SCI,LS-1,MS M838,LOS ALAMOS,NM 87545, USA. FU NCRR NIH HHS [P41-RR01315] NR 33 TC 11 Z9 12 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA SN 0008-5472 J9 CANCER RES JI Cancer Res. PD NOV 1 PY 1995 VL 55 IS 21 BP 5069 EP 5074 PG 6 WC Oncology SC Oncology GA TC468 UT WOS:A1995TC46800058 PM 7585553 ER PT J AU MURLEY, JS GRDINA, DJ AF MURLEY, JS GRDINA, DJ TI THE EFFECTS OF CYCLOHEXIMIDE AND WR-1065 ON RADIATION-INDUCED REPAIR PROCESSES - A MECHANISM FOR CHEMOPREVENTION SO CARCINOGENESIS LA English DT Article ID SISTER-CHROMATID EXCHANGES; V79 CELLS; ETHYL METHANESULFONATE; ESCHERICHIA-COLI; S-2-(3-AMINOPROPYLAMINO)-ETHYLPHOSPHOROTHIOIC ACID; 2-<(AMINOPROPYL)AMINO> ETHANETHIOL; CHEMICAL-COMPOUNDS; INDUCED MUTATIONS; DNA DAMAGE; PROTECTION AB The effects of cycloheximide (CHX) and 2-[(aminopropyl)amino]ethanethiol (WR-1065), each alone or in combination, on radiation-induced mutation induction at the hypoxanthine-guanine phosphoribosyl transferase (hprt) locus and cell killing were investigated using a Chinese hamster ovary (CHO) AAS cell system, Treatment with CHX, a potent inhibitor of protein synthesis, at a concentration of 10 mu g/ml administered 30 min prior to irradiation with 7.5 Gy had no effect on cell survival but did reduce the radiation-induced mutation frequency (per 10(6) survivors) from 106.5 +/- 8.8 (SEM) to 36.2 +/- 5.6 (SEM), Exposure of cells to 4 mM WR-1065 reduced the mutation frequency to 44.8 +/- 4.2 (SEM), but the combination of agents afforded no additional protection, that is 41.1 +/- 3.3 (SEM), The mechanism of action attributed to CHX in reducing mutation frequency is its ability to prevent the induction of an error-prone repair system, Split-dose radiation experiments, that is 8 Gy versus 4 Gy + 4 Gy separated by 3 h, were performed to evaluate and contrast the relative abilities of CHX and WR-1065, each alone or in combination, in affecting cell survival, Cycloheximide administered to cells 30 min before the first radiation dose and present throughout the 3 h incubation time prior to the second dose inhibited split-dose repair as evidenced by a reduction in surviving fraction by 60% as compared with the value obtained for non-CHX-treated cells that were exposed to two equal doses of 4 Gy, Cells exposed to 4 mM WR-1065 immediately following the first 4 Gy radiation dose and then washed free 2.5 h before exposure to a second 4 Gy dose, which was also followed by a 30 min exposure to WR-1065, increased the surviving fraction by 80% over the value obtained for cells not exposed to WR-1065 during their split-dose radiation treatment, When CHX treatment was combined with WR-1065 exposure, the protective effect of WR-1065 was abolished, that is surviving cell fraction was again reduced by similar to 60% as compared with untreated control groups, These results indicate that protein synthesis is required for WR-1065 to affect split-dose related repair processes, Presumably, the inhibition of the induction of an error-prone repair system by CHX would account for its effects on both resultant decreases in mutation frequency and cell survival, In contrast, WR-1065 and/or its disulfide metabolite appear to facilitate the efficacy and fidelity of such a repair system once it is induced. This is most probably the result of their polyamine-like structures and properties, which can influence the stability of DNA damaged sites as well as inhibit cell cycle progression, thus leading to longer times available in which to complete repair before damage is fixed at cell division. RP MURLEY, JS (reprint author), ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. FU NCPDCID CDC HHS [NCI 37435] NR 39 TC 12 Z9 12 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0143-3334 J9 CARCINOGENESIS JI Carcinogenesis PD NOV PY 1995 VL 16 IS 11 BP 2699 EP 2705 DI 10.1093/carcin/16.11.2699 PG 7 WC Oncology SC Oncology GA TG194 UT WOS:A1995TG19400016 PM 7586189 ER PT J AU DAI, S SIGMAN, ME BURCH, EL AF DAI, S SIGMAN, ME BURCH, EL TI PREPARATION OF A PHOTOCHROMIC GLASS DOPED WITH METHYLVIOLOGEN RADICAL-CATION VIA A SOL-GEL PROCESS SO CHEMISTRY OF MATERIALS LA English DT Article ID PHOTOINDUCED CHARGE SEPARATION; ARTIFICIAL PHOTOSYNTHESIS; ELECTRON-TRANSFER; REDUCTION; VIOLOGENS AB Methylviologen cation radical is produced by photolysis of methyl viologen dichloride entrapped in a sol-gel glass. The sol-gel glass is shown to be microporous, and it is suggested that the microporosity prevents oxygen diffusion thereby helping to extend the lifetime of the cation radical to a period of months. Initial losses of a substantial fraction of the charge separation are not observed. These results bear directly on efficient photochemical energy storage. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP DAI, S (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 31 TC 19 Z9 19 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD NOV PY 1995 VL 7 IS 11 BP 2054 EP 2057 DI 10.1021/cm00059a011 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TF115 UT WOS:A1995TF11500011 ER PT J AU BOGNER, J SPOKAS, K BURTON, E SWEENEY, R CORONA, V AF BOGNER, J SPOKAS, K BURTON, E SWEENEY, R CORONA, V TI LANDFILLS AS ATMOSPHERIC METHANE SOURCES AND SINKS SO CHEMOSPHERE LA English DT Article ID SOIL; CONSUMPTION; RATES AB Sanitary landfills are recognized as globally significant sources of atmospheric methane, but field measurements are rare. Existing country-specific landfill emissions have been estimated from solid waste statistics and a series of assumptions regarding methane generation and emission rates. There has been no attempt to reconcile the national and global estimates with limited field data on landfill methane emissions which range over six orders of magnitude (Bogner and Scott, 1995). This paper addresses controlled field measurements of methane emissions at sites in Illinois and California (USA) using a closed chamber technique. Overall, observed rates from various controlled monitoring experiments during 1988-1994 ranged from 0.003 io more than 1000 g CH4 m(-2) d(-1). Rates were related to the presence or absence of gas recovery wells, physical properties of cover soils (texture, moisture, and temperature) relating to their aeration status for diffusional flux, and rates of methane oxidation by indigenous methanotrophs. Surprisingly, at the Illinois site during spring, 1994, the landfill surface was consuming atmospheric methane rather than emitting landfill methane. This was attributed to high capacities for methane oxidation in well-aerated soils which had reduced landfill methane compared to 1993, the result of an effective pumped gas recovery system. Three independent methods confirmed that the landfill cover soils were functioning as a methane sink: (a) static closed chamber measurements yielding negative flux rates (uptake of atmospheric methane); (b) rates of methane oxidation similar to chamber results from in vitro field incubation studies using ambient methane; and (c) a reversal in the soil gas methane concentration gradient at the 25 cm depth. Field verification of landfill cover soils functioning as methane sinks has profound implications for revision of landfill contributions to global methane budgets; furthermore, it should be feasible to develop mitigation stategies incorporating a combination of engineered and natural methanotrophic controls. C1 NO ILLINOIS UNIV,DEPT GEOL,DE KALB,IL 60115. UNOCAL CORP,DIV SCI & TECHNOL,HARTLEY RES CTR,BREA,CA 92621. RP BOGNER, J (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Spokas, Kurt/F-4839-2016 OI Spokas, Kurt/0000-0002-5049-5959 NR 28 TC 99 Z9 107 U1 3 U2 23 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 NOV PY 1995 VL 31 IS 9 BP 4119 EP 4130 DI 10.1016/0045-6535(95)80012-A PG 12 WC Environmental Sciences SC Environmental Sciences & Ecology GA TC688 UT WOS:A1995TC68800012 ER PT J AU OROSKAR, AA GINGRICH, JC SULLIVAN, BM AF OROSKAR, AA GINGRICH, JC SULLIVAN, BM TI UTILITY OF THE HIGH-DENSITY 384-WELL-PLATE AS A CULTURE VESSEL FOR BACTERIAL, COSMID, AND YAC CLONES SO CLINICAL CHEMISTRY LA English DT Meeting Abstract C1 NUNC INC,NAPERVILLE,IL 60563. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC CLINICAL CHEMISTRY PI WASHINGTON PA 2101 L STREET NW, SUITE 202, WASHINGTON, DC 20037-1526 SN 0009-9147 J9 CLIN CHEM JI Clin. Chem. PD NOV PY 1995 VL 41 IS 11 BP 32 EP 32 PG 1 WC Medical Laboratory Technology SC Medical Laboratory Technology GA TD497 UT WOS:A1995TD49700064 ER PT J AU PLIMPTON, S AF PLIMPTON, S TI COMPUTATIONAL LIMITS OF CLASSICAL MOLECULAR-DYNAMICS SIMULATIONS SO COMPUTATIONAL MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Workshop on Glasses and the Glass Transition - Challenges in Materials Theory and Simulation CY FEB 16-18, 1995 CL KENT ISLAND, MD SP Ctr Theoret & Computat Mat Sci ID PARTICLES AB The system sizes and time scales accessible by classical molecular dynamics techniques on current-generation parallel supercomputers are briefly discussed. The implications for simulation of glasses and glass-forming materials now and in the near future are highlighted. C1 SANDIA NATL LABS,DEPT PARALLEL COMPUTAT SCI,ALBUQUERQUE,NM 87185. NR 12 TC 13 Z9 13 U1 2 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0927-0256 J9 COMP MATER SCI JI Comput. Mater. Sci. PD NOV PY 1995 VL 4 IS 4 BP 361 EP 364 DI 10.1016/0927-0256(95)00037-1 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA TJ104 UT WOS:A1995TJ10400011 ER PT J AU PANCAKE, CM SIMMONS, ML YAN, JC AF PANCAKE, CM SIMMONS, ML YAN, JC TI PERFORMANCE EVALUATION TOOLS FOR PARALLEL AND DISTRIBUTED SYSTEMS SO COMPUTER LA English DT Editorial Material C1 LOS ALAMOS NATL LAB,COMP RES & APPLICAT GRP,LOS ALAMOS,NM 87545. NASA,AMES RES CTR,DIV NUMER AERODYNAM SIMULAT SYST,MOFFETT FIELD,CA 94035. RP PANCAKE, CM (reprint author), OREGON STATE UNIV,CORVALLIS,OR 97331, USA. NR 10 TC 22 Z9 22 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0018-9162 J9 COMPUTER JI Computer PD NOV PY 1995 VL 28 IS 11 BP 16 EP 19 PG 4 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering SC Computer Science GA TC583 UT WOS:A1995TC58300012 ER PT J AU ARO, CJ RODRIGUE, GH AF ARO, CJ RODRIGUE, GH TI PRECONDITIONED TIME DIFFERENCING FOR STIFF ODES IN DIURNAL ATMOSPHERIC KINETICS SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article DE ATMOSPHERIC CHEMICAL KINETICS; STIFF ODES; PRECONDITIONING AB The equations of atmospheric chemical kinetics are often very stiff. It is, in large part, due to the computational expense involved with solving these equations, that extended integrations of three-dimensional chemical-radiative-transport models are still not economically feasible. The problem with stiff equations is the severe limitation placed on the stepsize of an explicit scheme due to stability, which forces the use of an implicit scheme. The problem with the implicit scheme, however, is that a non-linear system must be solved at each step. In this paper, we examine a methodology that yields unconditionally stable, explicitly computable methods for a class of chemical kinetics equations without requiring the use of a Jacobian matrix. These methods are variants of a fixed point iterative method and are called preconditioned time differencing methods. We show that these methods are significantly faster than the counterpart methods in widespread use with chemical-radiative-transport models. This result lays the groundwork for further research that promises to significantly improve the performance of these vital research models. C1 UNIV CALIF DAVIS,DEPT APPL SCI,LIVERMORE,CA 94550. RP ARO, CJ (reprint author), UNIV CALIF DAVIS,UNIV CALIF LAWRENCE LIVERMORE NATL LAB,POB 808,L-794,LIVERMORE,CA 94550, USA. NR 30 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD NOV PY 1995 VL 92 IS 1 BP 27 EP 53 PG 27 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA TF846 UT WOS:A1995TF84600005 ER PT J AU LEVY, AV AF LEVY, AV TI EROSION AND EROSION-CORROSION OF METALS SO CORROSION LA English DT Article DE BRITTLE SCALES; DUCTILE METALS; EROSION; EROSION-CORROSION; OXIDATION; SOLID PARTICLES ID 9CR-1MO STEEL; TEMPERATURE AB The loss of material from the surface of a metal being impacted by small, solid particles carried in a flowing gas occurs by a sequence of mechanical actions. The present work, which was presented as the plenary lecture at CORROSION/95, describes the mechanisms that occur on ductile and brittle materials and relates these mechanisms to surface loss rates. The ability of these mechanisms to be represented by mathematical models is assessed. The effects of material properties on erosion behavior is discussed. Combined erosion-corrosion surface degradation mechanisms are explained. RP LEVY, AV (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 13 TC 19 Z9 21 U1 0 U2 4 PU NATL ASSN CORROSION ENG PI HOUSTON PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906 SN 0010-9312 J9 CORROSION JI Corrosion PD NOV PY 1995 VL 51 IS 11 BP 872 EP 883 PG 12 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TC878 UT WOS:A1995TC87800007 ER PT J AU Kockerling, M Franzen, HF AF Kockerling, M Franzen, HF TI On the borderline of Pauling's bond order concept: Metal-metal bonding in icosahedral chains of metal-rich tantalum sulfides SO CROATICA CHEMICA ACTA LA English DT Article ID CRYSTAL-STRUCTURE; SYSTEM AB Metal-metal bonding in the icosahedral metal-rich sulfides of Ta is considered from the point of view of extended Huckel calculations via Mullikan overlap populations and from the point-of-view of Pauling bond order. It is found that the two approaches are generally consistent, but that the overlap populations provide a more sensitive estimate of reaction energies. The results are consistent with a strong stabilization of the icosahedral clusters by central atom to icosahedral metal atom bonding and a weak destabilization (relative to the disproportionation products) by the icosahedral metal atom bonds. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP Kockerling, M (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 23 TC 16 Z9 16 U1 0 U2 2 PU CROATIAN CHEMICAL SOC PI ZAGREB PA MARULICEV TRG 19/II, 41001 ZAGREB, CROATIA SN 0011-1643 J9 CROAT CHEM ACTA JI Croat. Chem. Acta PD NOV PY 1995 VL 68 IS 4 BP 709 EP 719 PG 11 WC Chemistry, Multidisciplinary SC Chemistry GA TM899 UT WOS:A1995TM89900004 ER PT J AU Ryan, TR McCarley, RE AF Ryan, TR McCarley, RE TI Synthesis and structure of a tungsten dimer with a W-W bond order of 3.5 SO CROATICA CHEMICA ACTA LA English DT Article ID QUADRUPLE BONDS; COMPLEXES; DIMOLYBDENUM; SPECTRA; HOMOLOG AB Reaction of W-2(mhp)(4), where mhp is the anion of 2-hydroxy-6-methylpyridine, with AlCl3 in refluxing diglyme provides the new paramagnetic compound W2Cl2(mhp)(3). CH2Cl2 in 67 percent yield after recrystallization from dichloromethane. The source of the oxidant for oxidation of tungsten from W(2.0) to W(2.5) was not identified. Orange-brown crystals of the new compound belong to the noncentric orthorhombic space group P2(1)2(1)2(1) with a = 13.150(6), b = 21.24(1) and c = 8.738(4) Angstrom, Z = 4. Refinement of the structure provided R(R(W)) = 0.058(0.080) and a W-W bond distance of 2.214(2) Angstrom, 0.053 Angstrom longer than that in W-2(mhp)(4) CH2Cl2. The W-W bond has a bond order of 3.5 corresponding to the bonding orbital population sigma(2) pi(4) delta(1). Strong bands arising from W-Cl stretching modes occur at 321 and 289 cm(-1) in the IR spectra, and a weak band at 782 nm (epsilon similar to 600 M(-1)cm(-1)) in the W-visible spectrum may correspond to the delta --> delta* electronic transition. The EPR spectrum shows a strong, nearly symmetric, absorption with g = 1.842. Cyclic voltammetry in dichloromethane reveals a quasi-reversible reduction at E(1/2) = -0.7 V vs. SSCE and an irreversible oxidation at +0.3 V. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 23 TC 2 Z9 2 U1 0 U2 0 PU CROATIAN CHEMICAL SOC PI ZAGREB PA MARULICEV TRG 19/II, 41001 ZAGREB, CROATIA SN 0011-1643 J9 CROAT CHEM ACTA JI Croat. Chem. Acta PD NOV PY 1995 VL 68 IS 4 BP 769 EP 780 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA TM899 UT WOS:A1995TM89900007 ER PT J AU Brnicevic, N KojicProdic, B Luic, M Kashta, A Planinic, P McCarley, RE AF Brnicevic, N KojicProdic, B Luic, M Kashta, A Planinic, P McCarley, RE TI Synthesis, crystal structures and properties of new chloroniobium cluster hydroxides with co-ordinated and non-coordinated OH- groups. The presence of H3O2- intercluster bridges SO CROATICA CHEMICA ACTA LA English DT Article ID NIOBIUM; CHEMISTRY; COMPLEXES; TANTALUM; TA; BR AB The isostructural, trigonal clusters of the composition [Nb6Cl12(H2O)(6)](OH)(2) . 1/4CH(3)OH . 6H(2)O 1 and [Nb6Cl12(H2O)(6)](OH)(2) 6H(2)O 2 have been isolated from alkaline solutions of [Nb6Cl12](2+) cluster in alcohol/water (1:3) in the presence of NMe(4)OH, while the presence of NEt(4)OH yielded NEt(4)[Nb6Cl12(H3O2)(6/2)]. 3H(2)O 3. Compound 1 crystallizes in trigonal space group R(3) over barm$ with a = 21.166(5)Angstrom and c = 23.812(4)Angstrom, gamma = 120 degrees, U = 9238.6(3) Angstrom(3), Z = 12. Two crystallographically independent cluster octahedra (I and II) have been found in the unit cell of 1 in the ratio 3:1. The Nb-O distances of 2.211(11)Angstrom and 2.217(16)Angstrom for I and 2.238(19)Angstrom for II indicate six co-ordinated water molecules. The cluster units of I are connected by hydrogen bonds of 2.49(1)Angstrom into a two-dimensional framework. Compound 3 is monoclinic, space group P2(1)/n, a = 10.085(5) Angstrom, b = 11.446(4)Angstrom, c = 14.971(6)Angstrom, beta = 102.95(6)degrees, U = 1684.2(1)Angstrom(3), Z = 2. The short Nb-O distances at 2.167(6), 2.177(8) and 2.187(7)Angstrom and considerable reduction of the Nb-O stretching frequency in the IR spectra support the presence of H3O2- (co-ordinated water molecule from one cluster unit and co-ordinated OH- group from the neighbouring cluster unit) bridges. Each cluster unit is joined to the six neighbouring units by intermolecular hydrogen bonds of distances 2.540(11)Angstrom and 2.594(10)Angstrom in a three-dimensional network. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP Brnicevic, N (reprint author), RUDJER BOSKOVIC INST,POB 1016,ZAGREB 10000,CROATIA. NR 15 TC 10 Z9 10 U1 0 U2 0 PU CROATIAN CHEMICAL SOC PI ZAGREB PA MARULICEV TRG 19/II, 41001 ZAGREB, CROATIA SN 0011-1643 J9 CROAT CHEM ACTA JI Croat. Chem. Acta PD NOV PY 1995 VL 68 IS 4 BP 861 EP 875 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA TM899 UT WOS:A1995TM89900013 ER PT J AU Sirac, S Trojko, R Maric, L McCarley, RE Tolstikhin, O Brnicevic, N AF Sirac, S Trojko, R Maric, L McCarley, RE Tolstikhin, O Brnicevic, N TI Reactions of niobium and tantalum hexanuclear halide clusters with nitrogen bases. Clusters of the type [M(6)X(12)L(6)]X(2), L=NH3, CH3CN, C5H5N SO CROATICA CHEMICA ACTA LA English DT Article AB Microcrystalline substances of the composition [M(6)X(12)L(6)]X(2), M = Nb, Ta, X = Cl, Br, L = NH3, CH3CN, C5H5N, were prepared by the reaction of ethanolic solutions of [M(6)X(12)(C2H5OH)6]X(2) with ammonia gas or simply by dissolving these clusters in acetonitrile or pyridine. The spectral data point to the occupancy of all octahedral coordination sites by nitrogen donor ligands. C1 RUDJER BOSKOVIC INST,ZAGREB 1000,CROATIA. UNIV ZAGREB,FAC SCI,ZAGREB,CROATIA. AMES LAB,AMES,IA. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. NR 9 TC 8 Z9 8 U1 0 U2 1 PU CROATIAN CHEMICAL SOC PI ZAGREB PA MARULICEV TRG 19/II, 41001 ZAGREB, CROATIA SN 0011-1643 J9 CROAT CHEM ACTA JI Croat. Chem. Acta PD NOV PY 1995 VL 68 IS 4 BP 905 EP 907 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA TM899 UT WOS:A1995TM89900018 ER PT J AU NIEMANN, RC GONCZY, JD PHELAN, PE NICOL, TH AF NIEMANN, RC GONCZY, JD PHELAN, PE NICOL, TH TI DESIGN AND PERFORMANCE OF LOW-THERMAL-RESISTANCE, HIGH-ELECTRICAL-ISOLATION HEAT INTERCEPT CONNECTIONS SO CRYOGENICS LA English DT Article; Proceedings Paper CT International Cryogenic Materials Conference on Nonmetallic Materials and Composites at Low Temperatures-VII CY OCT 24-26, 1994 CL HONOLULU, HI SP Kansai Atom Conf, Kansai Branch Cryogen Soc Japan, Tokai Univ DE HEAT INTERCEPT; THERMAL INTERFERENCE FIT; COMPOSITE AB Electrical conductors often require the removal of heat produced by normal operation. The heat can be removed by mechanical connection of the conductor to a refrigeration source. Such connections require both effective heat removal (low thermal resistance) and effective electrical isolation (high electrical resistance and high dielectric strength). Fabrication of these connections should be straightforward, and performance must be reliable and independent of operating temperature. The connection method described here involves clamping (by thermal interference fit) an electrically insulating cylinder between an outer metallic ring and an inner metallic disc. Material candidates for insulating cylinders include composites, e.g. epoxy/fibreglass, and ceramics, e.g. alumina. Design factors, including geometry, materials and thermal contact resistance are discussed. The design, construction experience and performance measurements of a heat intercept connection in a high-temperature superconducting lead assembly is presented. C1 UNIV HAWAII,DEPT ENGN MECH,HONOLULU,HI 96822. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP NIEMANN, RC (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 9 TC 3 Z9 3 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA LINACRE HOUSE JORDAN HILL, OXFORD, OXON, ENGLAND OX2 8DP SN 0011-2275 J9 CRYOGENICS JI Cryogenics PD NOV PY 1995 VL 35 IS 11 BP 829 EP 832 DI 10.1016/0011-2275(95)90926-7 PG 4 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA TB874 UT WOS:A1995TB87400040 ER PT J AU NOLAN, JP POSNER, RG MARTIN, JC HABBERSETT, R SKLAR, LA AF NOLAN, JP POSNER, RG MARTIN, JC HABBERSETT, R SKLAR, LA TI A RAPID MIX FLOW CYTOMETER WITH SUBSECOND KINETIC RESOLUTION SO CYTOMETRY LA English DT Article DE FORMYL PEPTIDE; LIGAND BINDING ID ONLINE REAGENT ADDITION; TIME AB Kinetic approaches are valuable tools for mechanistic studies of cell function, Flow cytometry is well suited to make sensitive kinetic measurements, but the time required to deliver mixed samples to the point of measurement (10-20 s in a conventional cytometer) limits analysis of rapidly occurring events, To address this limitation, we adapted a syringe-based stopped-now rapid mixing device to a modified commercial now cytometer to achieve mixing and measurement of sample in under 1 s, Because such screw-driven mixers are designed to deliver fluid at rates of microliters per millisecond and cytometers accept samples at microliters per second, the syringe mixer was modified with a screw to allow sample delivery at rates as low as 1.8 mu l/s. A custom-made nozzle holder featuring a fast-acting three-way sample delivery valve and a 1.5-mu l dead volume was designed for a Becton Dickinson FAGS stream-in-air flow nozzle, Syringe motors and valves are computer controlled, as is the start signal for an adjustable time ramp. A stable sample stream can be established within the sheath stream in less than 1 s, enabling fluorescence measurements of microspheres with coefficients of variation of similar to 5%, Light scatter gating to select particles in the center of the laser beam enables fluorescence measurements at times of under 300 ms. Efficient mixing of reagents is demonstrated by the iodide quenching of microspheres surface labeled with fluorescein isothiocyanate (FITC), The instrument is capable of quantitatively proportioning cells and reagent, thereby allowing precise control of reagent concentration and dilution, Rapid kinetic measurements of intact cells are demonstrated by PITC-formyl peptide binding to cell surface receptors. (C) 1995 Wiley-Liss, Inc.* C1 LOS ALAMOS NATL LAB,NATL FLOW CYTOMETRY RESOURCE,LOS ALAMOS,NM 87545. UNIV NEW MEXICO,SCH MED,ALBUQUERQUE,NM 87131. FU NCRR NIH HHS [RR01315]; NIAID NIH HHS [AI19032] NR 14 TC 31 Z9 33 U1 0 U2 1 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 NOV 1 PY 1995 VL 21 IS 3 BP 223 EP 229 DI 10.1002/cyto.990210302 PG 7 WC Biochemical Research Methods; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA TD735 UT WOS:A1995TD73500001 PM 8582244 ER PT J AU Shearer, MH Stevens, FJ Westholm, FA Jenson, HB Chanh, TC Carey, KD White, GL Solomon, A Kennedy, RC AF Shearer, MH Stevens, FJ Westholm, FA Jenson, HB Chanh, TC Carey, KD White, GL Solomon, A Kennedy, RC TI Serologic crossreactions among private immunoglobulins SO DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY LA English DT Article DE primates; monoclonal antibodies; immunoglobulins; evolution; Bence Jones proteins; L chain subgroups ID INFLUENZAE-B POLYSACCHARIDE; ANTIBODY-RESPONSE; IGG; EXPRESSION; PROTEIN; ANTIGEN; VIRUS AB We have generated and characterized 50 murine monoclonal antibodies (mAb) specific for baboon IgG, We examined crossreactivity of these mAb to baboon IgM and immunoglobulin (Ig) of various other primates including human, chimpanzee, rhesus monkey, cynomologous monkey, and African green monkey, Those mAB that crossreacted with human IgG were further examined using myeloma proteins for specificity to human Ig subclasses, One mAB crossreacted with all four human IgG subclasses and with human IgM, We further analyzed this reactivity utilizing Bence Jones proteins representative of various light (L) chain germline gene family products, This mAB reacted with Bence Jones proteins indicating the recognition of a kappa (kappa) L chain specificity associated with the kappa I, kappa III, and kappa IV subgroups, but not with kappa II. Based on the differences between KII germ line gene encoded L chains and the other kappa L chain subgroups, we ascribe this reactivity to six amino acids that define a discontinuous epitope. C1 UNIV OKLAHOMA,HLTH SCI CTR,DEPT MICROBIOL & IMMUNOL,OKLAHOMA CITY,OK 73190. UNIV OKLAHOMA,HLTH SCI CTR,DEPT PATHOL,OKLAHOMA CITY,OK 73190. ARGONNE NATL LAB,CTR MECH BIOL & BIOTECHNOL,ARGONNE,IL 60439. UNIV TEXAS,HLTH SCI CTR,DEPT PEDIAT,SAN ANTONIO,TX 78284. UNIV TEXAS,HLTH SCI CTR,DEPT MICROBIOL,SAN ANTONIO,TX 78284. SW FDN BIOMED RES,DEPT VIROL & IMMUNOL,SAN ANTONIO,TX 78207. SW FDN BIOMED RES,DEPT PHYSIOL & MED,SAN ANTONIO,TX 78207. UNIV TENNESSEE,MED CTR,GRAD SCH MED,DEPT MED,HUMAN IMMUNOL & CANC PROGRAM,KNOXVILLE,TN 37920. FU NCI NIH HHS [CA10056]; NIAID NIH HHS [N0I-AI-35156]; NIDDK NIH HHS [DK43757] NR 30 TC 7 Z9 7 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0145-305X J9 DEV COMP IMMUNOL JI Dev. Comp. Immunol. PD NOV-DEC PY 1995 VL 19 IS 6 BP 547 EP 557 DI 10.1016/0145-305X(95)00026-P PG 11 WC Immunology; Zoology SC Immunology; Zoology GA TL842 UT WOS:A1995TL84200009 PM 8773203 ER PT J AU Kuang, YI Lee, NS Badzian, A Tsong, TT Badzian, T Chen, CG AF Kuang, YI Lee, NS Badzian, A Tsong, TT Badzian, T Chen, CG TI Study of antiphase boundaries and local 3x1 configuration on the (001) surface of homoepitaxial diamond films by scanning tunneling microscopy SO DIAMOND AND RELATED MATERIALS LA English DT Article DE defects; hydrogen; diamond films; scanning tunneling microscopy ID SI(001) SURFACES; SI(100); GROWTH AB Homoepitaxial diamond films have been studied using scanning tunneling microscopy. Boron-doped films were grown on diamond (001) substrates by microwave plasma-assisted chemical vapor deposition. Atomic resolution scanning tunneling microscopy (STM) images showed a dimer-type 2 x 1 reconstructed surface structure and features such as steps, kinks and terraces. Single steps where dimer rows on the upper terrace are normal to the step edge are ragged and the steps where dimer rows are parallel to the step edge are straight, indicating that the steps have different formation energies. The double-domain surface structure observed with STM was in agreement with low-energy electron diffraction pattern. Atomic images revealed two different types of antiphase boundary on the diamond (001) surface. These antiphase boundaries run parallel to or perpendicular to the dimer rows where dimer rows shift by only one lattice constant of the diamond (001) surface. We found that single dimer rows preferentially extended along an antiphase boundary. Local 3 x 1 configurations have been observed on homoepitaxially grown diamond (001) surface. C1 PENN STATE UNIV,MAT RES LAB,UNIVERSITY PK,PA 16802. ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP Kuang, YI (reprint author), PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802, USA. NR 16 TC 9 Z9 9 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0925-9635 J9 DIAM RELAT MATER JI Diam. Relat. Mat. PD NOV PY 1995 VL 4 IS 12 BP 1371 EP 1375 DI 10.1016/0925-9635(95)00322-3 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA TM760 UT WOS:A1995TM76000012 ER PT J AU ZAWODZINSKI, TA CAMPBELL, C DAVEY, J GOTTESFELD, S SERACH, J WILSON, M RISHPON, J AF ZAWODZINSKI, TA CAMPBELL, C DAVEY, J GOTTESFELD, S SERACH, J WILSON, M RISHPON, J TI THIN-LAYER COMPOSITE ENZYME ELECTRODES FOR GLUCOSE DETERMINATIONS SO ELECTROANALYSIS LA English DT Article DE GLUCOSE; BIOSENSOR; NAFION; OXYGEN DEPENDENCE ID OXIDASE; IMMOBILIZATION; SENSOR AB We have prepared amperometric glucose sensitive electrodes with a composite active layer consisting of Nafion, glucose oxidase, and carbon-supported platinum particles. A particularly advantageous configuration results from the use of such a film on a gas diffusion electrode. We demonstrate that the gas diffusion electrode configuration enables us to supply oxygen from the back of the electrode, thus providing the capability of operating the sensor independent of dissolved oxygen. The insensitivity to solution oxygen concentration has been demonstrated by monitoring the glucose response of the electrode after extensive deoxygenation of solution. Cast composite layers yield mechanically robust coatings with high enzyme loadings, and thus high sensitivity to glucose. The electrode responds rapidly and is stable over a long period (90% activity after more than half a year) when stored in solution. We have optimized the composition of the sensitive layer with respect to Nafion to C/Pt ratio and enzyme loading. C1 TEL AVIV UNIV,DEPT BIOTECHNOL,IL-69978 RAMAT AVIV,ISRAEL. RP ZAWODZINSKI, TA (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 22 TC 7 Z9 7 U1 0 U2 4 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 1040-0397 J9 ELECTROANAL JI Electroanalysis PD NOV PY 1995 VL 7 IS 11 BP 1035 EP 1040 DI 10.1002/elan.1140071108 PG 6 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA TE989 UT WOS:A1995TE98900007 ER PT J AU CHANG, HT YEUNG, ES AF CHANG, HT YEUNG, ES TI DYNAMIC CONTROL TO IMPROVE THE SEPARATION PERFORMANCE IN CAPILLARY ELECTROPHORESIS SO ELECTROPHORESIS LA English DT Article DE CAPILLARY ELECTROPHORESIS; DYNAMIC CONTROL; REPRODUCIBILITY ID ELECTROOSMOTIC FLOW-CONTROL; EXTERNAL ELECTRIC-FIELD; APPLIED RADIAL VOLTAGE; ZONE ELECTROPHORESIS; PH GRADIENT; GEL-ELECTROPHORESIS; TEMPERATURE; MANIPULATION; GENERATION; OPTION AB Dynamic control in capillary electrophoresis (CE) is able to provide better resolution, shorter separation time, reduced band broadening and better reproducibility for the separations of organic and inorganic ions and large molecules such as proteins and DNA. This article provides an overview of dynamic control in CE by several techniques: pH, temperature, external electric field, and field amplification. These techniques take advantage of the changes in electroosmotic flow coefficient, electrophoretic mobilities of the analytes due to changes in equilibrium, viscosity of the buffer solution, and/or electric field strength. The basic theories and applications to the improvement of the separation performance for standard samples in CE by using these dynamic control techniques are presented. Finally, the advantages and shortcomings of these techniques and the future trends of dynamic control for the separations of real samples are discussed. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NICHHD,MACROMOLEC ANAL SECT,THEORET & PHYS BIOL LAB,BETHESDA,MD. US DOE,AMES LAB,AMES,IA 50011. RI Chang, Huan-Tsung/C-1183-2011 NR 52 TC 6 Z9 8 U1 1 U2 8 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 NOV PY 1995 VL 16 IS 11 BP 2069 EP 2073 DI 10.1002/elps.11501601336 PG 5 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA TJ765 UT WOS:A1995TJ76500011 PM 8748737 ER PT J AU HONG, SC LEE, CS AF HONG, SC LEE, CS TI ELECTROOSMOTIC CONTROL OF CHIRAL SEPARATION IN CAPILLARY ZONE ELECTROPHORESIS SO ELECTROPHORESIS LA English DT Article DE ELECTROOSMOTIC CONTROL; CHIRAL SEPARATION; CAPILLARY ELECTROPHORESIS ID MICELLAR ELECTROKINETIC CHROMATOGRAPHY; BILE-SALTS; CYCLODEXTRIN; FLUORESCENCE; ENANTIOMERS AB The resolution in capillary zone electrophoresis (CZE), with the assumption of diffusion control only, is strongly dependent on the direction and magnitude of electroosmotic flow. In fact, excellent separation resolution will be obtained if the electroosmotic flow is in the opposite direction of the electrophoretic migration. By applying various radial electric potential gradients across the capillary wall, the direct control of the zeta potential and the electroosmotic flow results in a great enhancement of chiral resolution in cyclodextrin-modified CZE. All 12 basic chiral drugs, including (+/-)-ephedrine, (+/-)-pseudoephedrine, (+/-)-norephedrine, (+/-)-epinephrine, (+/-)-norepinephrine, and (+/-)-isoproterenol, are separated and resolved within 22 min of the analysis time. There is no additional band broadening and dispersion introduced by the direct control of electroosmosis with the application of various radial electric potential gradients. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 17 TC 13 Z9 13 U1 1 U2 5 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 NOV PY 1995 VL 16 IS 11 BP 2132 EP 2136 DI 10.1002/elps.11501601344 PG 5 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA TJ765 UT WOS:A1995TJ76500019 PM 8748745 ER PT J AU MARLAND, G SCHLAMADINGER, B AF MARLAND, G SCHLAMADINGER, B TI BIOMASS FUELS AND FOREST-MANAGEMENT STRATEGIES - HOW DO WE CALCULATE THE GREENHOUSE-GAS EMISSIONS BENEFITS SO ENERGY LA English DT Article ID CARBON AB We show in this study that a full fuel-cycle analysis of the greenhouse gas (GO,) implications of biomass energy systems has not only to take into account the inputs and outputs of energy (and associated carbon content) but must recognize that many biomass systems have by-products that are produced along with the biofuel. The analysis must also account for the temporal variability of carbon stocks and fluxes associated with the standing biomass and its harvest. Where land resources are limited, we need to consider the opportunity cost of managing the land to produce biomass fuels. Establishing a system of parties, each accountable for its own greenhouse-gas emissions, would require detailed deliberations on how to treat carbon flows in biofuels and wood products exchanged between the parties. An accounting for credits and debits has to be found that encourages each party to act in a way that is optimal for the carbon budget of the whole system. C1 JOANNEUM RES,A-8010 GRAZ,AUSTRIA. RP MARLAND, G (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 15 TC 36 Z9 38 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD NOV PY 1995 VL 20 IS 11 BP 1131 EP 1140 DI 10.1016/0360-5442(95)00061-K PG 10 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA RY133 UT WOS:A1995RY13300005 ER PT J AU LACKNER, KS WENDT, CH BUTT, DP JOYCE, EL SHARP, DH AF LACKNER, KS WENDT, CH BUTT, DP JOYCE, EL SHARP, DH TI CARBON-DIOXIDE DISPOSAL IN CARBONATE MINERALS SO ENERGY LA English DT Article ID CO2; ZEOLITES AB We introduce a safe and permanent method of CO2 disposal based on combining CO2. chemically with abundant raw materials to form stable carbonate minerals. Substantial heat is liberated in the overall chemical reaction so that cost will be determined by the simplicity and speed of the reaction rather than the cost of energy. Preliminary investigations have been conducted on two types of processes, involving either direct carbonation of minerals at high temperature or processing in aqueous solution. Promising raw materials are identified in both cases. For aqueous processing, a chemical cycle employing well-known reactions is proposed for digesting and carbonating the raw material. Cost estimates, based on comparison with standard industrial and mining practice, are encouraging. Necessary raw materials are surveyed and vast quantities are found to be easily accessible. Amounts are sufficient to allow utilization of the large known fossil-fuel reserves while avoiding build-up of atmospheric CO2. C1 UNIV WISCONSIN, MADISON, WI 53706 USA. RP LACKNER, KS (reprint author), LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RI Butt, Darryl/B-7480-2008 OI Butt, Darryl/0000-0003-4501-8864 NR 47 TC 394 Z9 415 U1 8 U2 73 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD NOV PY 1995 VL 20 IS 11 BP 1153 EP 1170 DI 10.1016/0360-5442(95)00071-N PG 18 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA RY133 UT WOS:A1995RY13300007 ER PT J AU CHANG, SL LOTTES, SA AF CHANG, SL LOTTES, SA TI CHARACTERISTICS OF MULTIPHASE FLOW WITH PARTICLE EVAPORATION IN A COMBUSTOR WITH COUNTER-FLOW INJECTION SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article DE MULTIPHASE FLOW; PARTICLE EVAPORATION; COMBUSTOR; COUNTER-FLOW INJECTION AB Seed particles are added to a high temperature reacting Row to achieve the desired electric conductivity for magnetohydrodynamic (MHD) power generation. The evaporation rate of the seed particles and the uniformity of the seed vapor distribution in the reacting Row are major factors affecting the performance of the MHD system. An integral reacting flow (IRF) computer code was used to calculate the multi-phase flow characteristics in an MHD combustor and predict the optimum operating conditions of the combustor. The IRF code is a general hydrodynamics computer code for multi-phase, two-dimensional, steady state, turbulent, and reacting flows, based on mass, momentum, and energy conservation laws. A unique integral reaction submodel in the IRF code enhances numerical convergence while preserving the major physical effects of the complex combustion processes. The combustor is a rectangular channel in which a mixture of fuel gas and seed particles enters from one end and exits at the other, while the oxidizer is injected from the sides. The major findings of a parametric study included: (1) the seed particle evaporation rate varies for different oxidizer injection angles; (2) the optimal evaporation rate was found at an injection angle around 130 degrees; (3) the seed particle size had a major effect on particle dispersion and vapor mixing; (4) sped particles with a diameter of 34 mu m or larger were only partially vaporized in the combustor, and the seed vapor distribution at the combustor exit was highly non-uniform; and (5) significant particle deposition was found on the side walls upstream of the oxidizer injection slots. Theoretical predictions were in general agreement with experimental trends. RP CHANG, SL (reprint author), ARGONNE NATL LAB,DIV ENERGY SYST,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 0 TC 3 Z9 3 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD NOV PY 1995 VL 36 IS 11 BP 1031 EP 1045 DI 10.1016/0196-8904(95)00004-W PG 15 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA RN722 UT WOS:A1995RN72200001 ER PT J AU GUTHRIE, RD RAMAKRISHNAN, S BRITT, PF BUCHANAN, AC DAVIS, BH AF GUTHRIE, RD RAMAKRISHNAN, S BRITT, PF BUCHANAN, AC DAVIS, BH TI HYDROTHERMOLYSIS OF A SILICA-IMMOBILIZED DIPHENYLETHANE SO ENERGY & FUELS LA English DT Article ID THERMOLYSIS; HYDROGEN; SURFACE; COAL; CHEMISTRY; BIBENZYL; MODEL AB The compound 1-(4'-hydroxyphenyl)-2-phenylethane attached through an Si-O-Ar linkage to fumed silica was subjected to thermolysis (390-410 degrees C) under D-2 and N-2 (14 MPa). Product distributions under D-2 are similar to those previously observed in vacuum except for increases in yields of benzene and phenol expected as a consequence of hydrocracking. The high pressure of D-2 does not inhibit retrogressive reactions (rearrangement, cyclization) previously found to be promoted by restricted mass transport conditions. A demonstrated silica-promoted H-D exchange of small amounts of phenolic compounds present in equilibrium with surface-attached materials under the closed, high-pressure reactor conditions required for D-2 experiments complicates interpretation of deuterium distribution information. However, non-hydroxylated aromatic rings are immune to this process and measurement of their D incorporation shows that the normal D-atom-promoted exchange is more efficient in the gas phase than on the silica surface. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. KENTUCKY CTR APPL ENERGY RES,LEXINGTON,KY 40511. RP GUTHRIE, RD (reprint author), UNIV KENTUCKY,DEPT CHEM,LEXINGTON,KY 40506, USA. NR 20 TC 3 Z9 3 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD NOV-DEC PY 1995 VL 9 IS 6 BP 1097 EP 1103 DI 10.1021/ef00054a025 PG 7 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA TF879 UT WOS:A1995TF87900026 ER PT J AU Dunkerley, J Jhirad, D AF Dunkerley, J Jhirad, D TI Financing the energy sector in developing countries - Introduction SO ENERGY POLICY LA English DT Editorial Material C1 US DOE,WASHINGTON,DC 20085. NR 0 TC 1 Z9 1 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD NOV PY 1995 VL 23 IS 11 BP 927 EP 927 DI 10.1016/0301-4215(95)00119-0 PG 1 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA TL554 UT WOS:A1995TL55400001 ER PT J AU Gold, LS Manley, NB Slone, TH Garfinkel, GB Ames, BN Rohrbach, L Stern, BR Chow, K AF Gold, LS Manley, NB Slone, TH Garfinkel, GB Ames, BN Rohrbach, L Stern, BR Chow, K TI Sixth plot of the Carcinogenic Potency Database: Results of animal bioassays published in the general literature 1989 to 1990 and by the National Toxicology Program 1990 to 1993 SO ENVIRONMENTAL HEALTH PERSPECTIVES LA English DT Article DE carcinogenic potency; TD50; database; animal cancer test; monkeys; dose response ID CHRONOLOGICAL SUPPLEMENT; RODENT CARCINOGENS; CHEMICAL CARCINOGENESIS; NONHUMAN-PRIMATES; TARGET ORGANS; CANCER; RATS; MICE; FOOD AB This paper presents two types of information from the Carcinogenic Potency Database (CPDB): (a) the sixth chronological plot of analyses of long-term carcinogenesis bioassays, and (b) an index to chemicals in all six plots, including a summary compendium of positivity and potency for each chemical (Appendix 14). The five earlier plots of the CPDB have appeared in this journal, beginning in 1984 (1-5). Including the plot in this paper, the CPDB reports results of 5002 experiments on 1230 chemicals. This paper includes bioassay results published in the general literature between January 1989 and December 1990, and in Technical Reports of the National Toxicology Program between January 1990 and June 1993. Analyses are included on 17 chemicals tested in nonhuman primates by the Laboratory of Chemical Pharmacology, National Cancer Institute. This plot presents results of 531 long-term, chronic experiments of 182 test compounds and includes the same information about each experiment in the same plot format as the earlier papers: the species and strain of test animal, the route and duration of compound administration, dose level and other aspects of experimental protocol, histopathology and tumor incidence, TD50 (carcinogenic potency) and its statistical significance, dose response, author's opinion about carcinogenicity, and literature citation. We refer the reader to the 1984 publications (1,6,7) for a detailed guide to the plot of the database, a complete description of the numerical index of carcinogenic potency, and a discussion of the sources of data, the rationale for the inclusion of particular experiments and particular target sites, and the conventions adopted in summarizing the literature, The six plots of the CPDB are to be used together since results of individual experiments that were published earlier are not repeated. Appendix 14 is designed to facilitate access to results on all chemicals. References to the published papers that are the source of experimental data are reported in each of the published plots. For readers using the CPDB extensively, a combined plot is available of all results from the six separate plot papers, ordered alphabetically by chemical; the combined plot in printed form or on computer tape or diskette is available from the first author. A SAS database is also available. For further information, our World Wide Web URL is http://potency.berkeley.edu/cpdb.html. C1 Univ Calif Berkeley, Div Biochem & Mol Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Gold, LS (reprint author), Univ Calif Berkeley, Div Biochem & Mol Biol, 433 Barker hall, Berkeley, CA 94720 USA. EM cpdb@potency.berkeley.edu FU NIEHS NIH HHS [ESO1896] NR 37 TC 36 Z9 37 U1 0 U2 2 PU US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE PI RES TRIANGLE PK PA NATL INST HEALTH, NATL INST ENVIRONMENTAL HEALTH SCIENCES, PO BOX 12233, RES TRIANGLE PK, NC 27709-2233 USA SN 0091-6765 EI 1552-9924 J9 ENVIRON HEALTH PERSP JI Environ. Health Perspect. PD NOV PY 1995 VL 103 SU 8 BP 3 EP + DI 10.2307/3432297 PG 118 WC Environmental Sciences; Public, Environmental & Occupational Health; Toxicology SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Toxicology GA V42AT UT WOS:000202841100001 PM 8741772 ER PT J AU GRITTINI, C MALCOMSON, M FERNANDO, Q KORTE, N AF GRITTINI, C MALCOMSON, M FERNANDO, Q KORTE, N TI RAPID DECHLORINATION OF POLYCHLORINATED-BIPHENYLS ON THE SURFACE OF A PD/FE BIMETALLIC SYSTEM SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Note ID ALCALIGENES-EUTROPHUS H850; ENRICHMENT C1 UNIV ARIZONA,DEPT CHEM,TUCSON,AZ 85721. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,GRAND JUNCTION OFF,GRAND JUNCTION,CO 81503. NR 15 TC 224 Z9 251 U1 4 U2 46 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 NOV PY 1995 VL 29 IS 11 BP 2898 EP 2900 DI 10.1021/es00011a029 PG 3 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA TC856 UT WOS:A1995TC85600047 PM 22206541 ER PT J AU WIDRIG, DL MANNING, JF AF WIDRIG, DL MANNING, JF TI BIODEGRADATION OF NO-2 DIESEL FUEL IN THE VADOSE ZONE - A SOIL COLUMN STUDY SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY LA English DT Article DE BIODEGRADATION; DIESEL FUEL; SOIL COLUMNS; PERIODIC OPERATION; HYDRAULIC CONDUCTIVITY ID SODIC SOILS; BIOREMEDIATION; GYPSUM AB Packed soil columns were used to simulate and investigate in situ biological remediation of soil contaminated with diesel fuel. We investigated and evaluated several operating strategies, including continuous flooding of the column soil with nutrient solution, and periodic operating cycles consisting of flooding followed by draining and aeration. The objectives were (a) to determine the extent of diesel fuel degradation in soil columns under four operating conditions (biologically inhibited control; continuous saturation with nitrogen and phosphorus amendments; periodic operation, consisting of flooding with nitrogen and phosphorus, followed by draining and forced aeration; and periodic operation, consisting of flooding with nitrogen, phosphorus, and calcium and magnesium amendments, followed by draining and forced aeration); (b) to evaluate CO2 production and oxygen consumption as indicators of biodegradation; (c) to monitor hydraulic conductivity under different operating strategies; and (d) to examine the system requirements for nitrogen and phosphorus. Our results showed that periodic operation promoted higher rates of biodegradation of diesel fuel in soil and minimized the use of water containing nutrient amendments, and consequently the possible need to collect and treat such water. We believe that monitoring CO2 and O-2 levels in situ may provide a means of optimizing the timing of flooding and aeration events to increase degradation rates. Results of this laboratory study will aid in improving the design and operation of field-scale bioremediation systems. RP WIDRIG, DL (reprint author), ARGONNE NATL LAB, DIV ENVIRONM RES, ARGONNE, IL 60439 USA. NR 19 TC 1 Z9 1 U1 1 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0730-7268 EI 1552-8618 J9 ENVIRON TOXICOL CHEM JI Environ. Toxicol. Chem. PD NOV PY 1995 VL 14 IS 11 BP 1813 EP 1822 DI 10.1897/1552-8618(1995)14[1813:BONDFI]2.0.CO;2 PG 10 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA TB369 UT WOS:A1995TB36900002 ER PT J AU RODEAN, HC AF RODEAN, HC TI TURBULENT-DIFFUSION AS A STOCHASTIC LAGRANGIAN PROCESS SO ENVIRONMETRICS LA English DT Article; Proceedings Paper CT Session on New Statistical Methods in Turbulent Diffusion, at the 5th International COnference on Environmetrics CY AUG, 1994 CL BURLINGTON, CANADA DE TURBULENT DIFFUSION; STOCHASTIC PROCESS; LAGRANGIAN TRAJECTORIES; LANGEVIN EQUATION; FOKKER-PLANCK EQUATION; KOLMOGOROVS 1941 HYPOTHESES; WELL-MIXED CONDITION ID DISPERSION; MODEL AB The present status of stochastic Lagrangian models of turbulent diffusion is reviewed, beginning with a brief historical introduction. The mathematical and physical foundations of these models are described. The derivation of the model for the Lagrangian trajectory of a single particle is illustrated for one-dimensional inhomogeneous Gaussian turbulence. Single-particle models for non-Gaussian turbulence in the convective boundary layer are described. The mean concentration in fixed co-ordinates is calculated from the statistics of thousands of single-particle trajectories. Another class of stochastic Lagrangian models gives the relative dispersion of particle pairs and the concentration variance. A list of references is provided for further study. RP RODEAN, HC (reprint author), LAWRENCE LIVERMORE NATL LAB,REG ATMOSPHER SCI DIV L-262,POB 808,LIVERMORE,CA 94551, USA. NR 22 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 1180-4009 J9 ENVIRONMETRICS JI Environmetrics PD NOV-DEC PY 1995 VL 6 IS 6 BP 659 EP 663 DI 10.1002/env.3170060613 PG 5 WC Environmental Sciences; Mathematics, Interdisciplinary Applications; Statistics & Probability SC Environmental Sciences & Ecology; Mathematics GA TJ144 UT WOS:A1995TJ14400012 ER PT J AU Kataoka, Y Perrin, J Hunter, N Grdina, D AF Kataoka, Y Perrin, J Hunter, N Grdina, D TI Amifostine protects against cyclophosphamide and cisplatin-induced mutagenesis without affecting therapeutic effectiveness SO EUROPEAN JOURNAL OF CANCER LA English DT Meeting Abstract C1 UNIV CHICAGO,CHICAGO,IL 60637. ARGONNE NATL LAB,ARGONNE,IL 60439. MD ANDERSON HOSP & TUMOR INST,HOUSTON,TX. NR 0 TC 2 Z9 2 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0959-8049 J9 EUR J CANCER JI Eur. J. Cancer PD NOV PY 1995 VL 31A SU 5 BP 110 EP 110 PG 1 WC Oncology SC Oncology GA TH919 UT WOS:A1995TH91900113 ER PT J AU PAPOULAR, RJ COX, DE AF PAPOULAR, RJ COX, DE TI MODEL-FREE SEARCH FOR EXTRA-FRAMEWORK CATIONS IN ZEOLITES USING POWDER DIFFRACTION SO EUROPHYSICS LETTERS LA English DT Article ID MAXIMUM-ENTROPY METHOD; ELECTRON-DENSITY-DISTRIBUTION; COMBINED MAXIMIZATION; IMAGE-RECONSTRUCTION; MULTISOLUTION METHOD; PHASE DETERMINATION; REFINEMENT; LIKELIHOOD; ABSENCE AB The crystal framework of zeolites can usually be determined using prior chemical knowledge and traditional crystallographic techniques using direct methods or Patterson syntheses. However, a more difficult problem often occurs in the structure refinement stage, namely the location of extra-framework cations, a key-feature of any zeolite catalyst. To find these, the methods currently in use rely heavily on educated guesses, constrained Rietveld refinements and Fourier syntheses. Here, we demonstrate a more objective way of locating these cations from powder diffraction data using a maximum-entropy approach. We have successfully applied this procedure to synchrotron X-ray powder data pertaining to Na-A and Y aluminosilicate zeolites. C1 CENS,LAB LEON BRILLOUIN,F-91191 GIF SUR YVETTE,FRANCE. RP PAPOULAR, RJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 32 TC 25 Z9 25 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 NOV 1 PY 1995 VL 32 IS 4 BP 337 EP 342 DI 10.1209/0295-5075/32/4/009 PG 6 WC Physics, Multidisciplinary SC Physics GA TE877 UT WOS:A1995TE87700009 ER PT J AU NECAS, E SEFC, L BRECHER, G BOOKSTEIN, N AF NECAS, E SEFC, L BRECHER, G BOOKSTEIN, N TI HEMATOPOIETIC RESERVE PROVIDED BY SPLEEN COLONY-FORMING-UNITS (CFU-S) SO EXPERIMENTAL HEMATOLOGY LA English DT Article DE HEMATOPOIESIS; COLONY-FORMING CELLS; BLOOD CELLS; MOUSE; APOPTOSIS; CFU-S ID STEM-CELLS; PLATELET PRODUCTION; SEEDING EFFICIENCY; MICE; KINETICS; STRAINS; NEUTROPHILIA; HYDROXYUREA; APOPTOSIS; INVIVO AB Using quantitative data available from the literature on murine hematopoiesis, the functional reserve of multipotential stem cells was calculated by comparing daily blood cell production with the potential of clonogenic spleen colony-forming cells (CFU-S) to generate blood cells. The potential of the day-8 CFU-S (CFU-S-8) population is estimated to be from 4000 to 37,000 times greater than needed in steady-state hematopoiesis. The CFU-S population may thus serve to provide a functional reserve to supply large numbers of peripheral blood cells via committed lineage-specific cells within days, whenever needed. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP NECAS, E (reprint author), CHARLES UNIV,FAC MED 1,DEPT PATHOPHYSIOL,U NEMOCNICE 5,CR-12853 PRAGUE,CZECH REPUBLIC. RI Sefc, Ludek/J-1848-2014 OI Sefc, Ludek/0000-0003-2846-220X NR 47 TC 16 Z9 16 U1 0 U2 1 PU CARDEN JENNINGS PUBL COLTD PI CHARLOTTESVILLE PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 SN 0301-472X J9 EXP HEMATOL JI Exp. Hematol. PD NOV PY 1995 VL 23 IS 12 BP 1242 EP 1246 PG 5 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA TD638 UT WOS:A1995TD63800002 PM 7589277 ER PT J AU INOUE, T HIRABAYASHI, Y MITSUI, H SASAKI, H CRONKITE, EP BULLIS, JE BOND, VP YOSHIDA, K AF INOUE, T HIRABAYASHI, Y MITSUI, H SASAKI, H CRONKITE, EP BULLIS, JE BOND, VP YOSHIDA, K TI SURVIVAL OF SPLEEN COLONY-FORMING-UNITS (CFU-S) OF IRRADIATED BONE-MARROW CELLS IN MICE - EVIDENCE FOR THE EXISTENCE OF A RADIORESISTANT SUBFRACTION SO EXPERIMENTAL HEMATOLOGY LA English DT Article DE HEMATOPOIETIC STEM CELLS; RADIATION SENSITIVITY; CFU-S ID HEMATOPOIETIC STEM-CELL; GENERATION-AGE; RADIATION; RBE AB Because of increasing evidence of heterogeneity in the hematopoietic stem cell compartments, the radiosensitivity of spleen colony-forming units (CFU-S) was reevaluated to ascertain whether the classical single exponential curve for a graded dose of radiation is applicable at higher doses of radiation, 400-600 cGy. Bone marrow cells (BMC) removed from mice immediately after death under anesthesia were irradiated in vitro. Great care was taken to exclude anoxic effects during irradiation and to avoid any possible effects in the recipient mice from injection of excessive numbers of BMC. By estimating the number of cells to be injected to produce numbers of colonies within the evaluation range of the assay, we obtained a radiation survival curve that appeared to have a multiphasic concave shape; the D-0 value for the 400-600 cGy range was estimated to be about 275 cGy, whereas the D, for the lower doses was 95 cGy, the same value as previously reported. The reason a single exponential survival curve was previously obtained after graded doses of radiation is discussed, and a comparison of those results with the present data from in vitro radiation is made. Lacking experimental evidence, we speculate that the major factor that determines the slope of the survival curve is the degree to which the stem cells are in their normal hematopoietic environment during the irradiation. The probable existence of a fraction surviving after an exposure to 600 cGy, estimated by the Limiting dilution assay, was about 1 per 2x10(6) BMC. Such radio-insensitive CFU-S appear to be primitive CFU-S, which can contribute materially to the long-term survival of lethally irradiated bone marrow recipients. C1 YOKOHAMA CITY UNIV,SCH MED,DEPT PATHOL,YOKOHAMA,KANAGAWA,JAPAN. YOKOHAMA CITY UNIV,SCH MED,DEPT PEDIAT,YOKOHAMA,KANAGAWA,JAPAN. BROOKHAVEN NATL LAB,DEPT MED,NEW YORK,NY. NATL INST RADIOL SCI,DIV PHYSIOL & PATHOL,CHIBA,JAPAN. RP INOUE, T (reprint author), NATL INST HYG SCI,DIV TOXICOL,SETAGAYA KU,1-18-1 KAMIYOGA,TOKYO 158,JAPAN. NR 20 TC 29 Z9 30 U1 0 U2 0 PU CARDEN JENNINGS PUBL COLTD PI CHARLOTTESVILLE PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 SN 0301-472X J9 EXP HEMATOL JI Exp. Hematol. PD NOV PY 1995 VL 23 IS 12 BP 1296 EP 1300 PG 5 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA TD638 UT WOS:A1995TD63800010 PM 7589285 ER PT J AU PFOHL, O HINO, T PRAUSNITZ, JM AF PFOHL, O HINO, T PRAUSNITZ, JM TI ON THE TEMPERATURE CALIBRATION OF A THERMOOPTICAL APPARATUS SO FLUID PHASE EQUILIBRIA LA English DT Letter DE EXPERIMENTS; METHOD ID CLOUD-POINT CURVES AB Saraiva et al. (1993) reported cloud-point curves for the system poly(ethylene glycol)/water using a thermo-optical analysis apparatus identical to that used by Bae et al. (1991). Even though both groups used nearly the same chemicals, a slight discrepancy was found between the data by Bae et al. and those by Saraiva et al. This discrepancy is, in part, due to a temperature calibration method that neglects temperature gradients in the heating chamber. An improved calibration method and an easy way to minimize temperature gradients is presented here. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 3 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilibria PD NOV PY 1995 VL 112 IS 1 BP 157 EP 162 DI 10.1016/0378-3812(93)02609-Q PG 6 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA TE242 UT WOS:A1995TE24200011 ER PT J AU Gouge, MJ Houlberg, WA Attenberger, SE Milora, SL Causey, RA Anderson, JL Petti, D Kveton, O Holland, DF AF Gouge, MJ Houlberg, WA Attenberger, SE Milora, SL Causey, RA Anderson, JL Petti, D Kveton, O Holland, DF TI Fuel source isotopic tailoring and its impact on international thermonuclear experimental reactor design, operation, and safety SO FUSION TECHNOLOGY LA English DT Article DE D-T fueling; isotopic tailoring; tritium inventory reduction ID FUSION AB Isotopic tailoring of the deuterium and tritium density profiles in fusion reactors can lead to reduced tritium inventory in plasma facing components and, therefore, improved safety considerations. The isotopic tailoring concept consists of utilizing a tritium-rich pellet source for core fueling and a deuterium-rich gas source for edge fueling. Because of the improved particle confinement associated with the deeper tritium core fueling component, comparable core densities of deuterium and tritium can be maintained even when the edge deuterium fuel source is much larger than the core tritium fuel source. The fuel composition of the edge and scrape-off plasmas as well as the isotope fractions in plasma facing components reflect the total throughput of all makeup fuel and are therefore deuterium-rich. This innovative fueling concept results in about a factor of two reduction in tritium inventory of the plasma facing components. The higher tritium burn fraction allows a significant reduction in tritium gas flows into and out of the vacuum vessel and, for fusion reactors, implies lower required tritium breeding ratios. C1 SANDIA NATL LABS,LIVERMORE,CA 94551. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. ITER,JOINT CENT TEAM,NAKA CO CTR,NAKA,IBARAKI 31101,JAPAN. RP Gouge, MJ (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 10 TC 22 Z9 22 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1995 VL 28 IS 4 BP 1644 EP 1650 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TZ619 UT WOS:A1995TZ61900003 ER PT J AU Logan, BG Moir, RW Hoffman, MA AF Logan, BG Moir, RW Hoffman, MA TI Requirements for low-cost electricity and hydrogen fuel production from multiunit inertial fusion energy plants with a shared driver and target factory SO FUSION TECHNOLOGY LA English DT Article DE inertial fusion energy; hydrogen; multiunit AB The economy of scale for multiunit inertial fusion energy (IFE) powerplants is explored based on the molten salt HYLIFE-II fusion chamber concept, for the purpose of producing lower cost electricity and hydrogen fuel. The cost of electricity (CoE) is minimized with a new IFE systems code IFEFUEL5 for a matrix of plant cases with one to eight fusion chambers of 250 to 2000-MW(electric) net output each, sharing a common heavy-ion driver and target factory. Improvements to previous HYLIFE-II models include a recirculating induction linac driver optimized as a function of driver energy and rep-rate (average driver power), inclusion of beam switchyard costs, a fusion chamber cost scaling dependence on both thermal power and fusion yield, and a more accurate bypass pump power scaling with chamber rep-rate. A CoE less than 3 c/k W(electric). h is found for plant outputs greater than 2 G W(electric), allowing hydrogen fuel production by water electrolysis to provide lower fuel cost per mile for higher efficiency hydrogen engines compared with gasoline engines. These multiunit, multi-G W(electric) IFE plants allow staged utility plant deployment, lower optimum chamber reprates, less sensitivity to driver and target fabrication costs, and a CoE possibly lower than future fission, fossil, and solar competitors. C1 UNIV CALIF DAVIS,DEPT MECH & AERONAUT ENGN,DAVIS,CA 95616. RP Logan, BG (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 43 TC 6 Z9 6 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD NOV PY 1995 VL 28 IS 4 BP 1674 EP 1696 PG 23 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TZ619 UT WOS:A1995TZ61900006 ER PT J AU CHEN, PS AF CHEN, PS TI ANOTHER GLANCE AT THE RAINBOW SO GENERAL RELATIVITY AND GRAVITATION LA English DT Article ID MICROWAVE BACKGROUND-RADIATION; INFLATIONARY UNIVERSE; MAGNETIC-FIELDS; ANISOTROPY; COSMOLOGY; FLATNESS; HORIZON; ORIGIN AB Inflationary cosmology predicts the generation of both density perturbation and relic gravitons. Tests of these predictions, especially the relic gravitons, will be crucial to the verification of inflation. Efforts have been made to distinguish different inflation models using observed anisotropies of the cosmic microwave background radiation. However, the fact that both scalar and tensor modes contribute to the Sachs-Wolfe effect renders such determination difficult. We point out that, mediated by the primordial magnetic field, the relic gravitons can resonantly convert into photons at the same frequencies. Measurement of the spectrum of these long wavelength EM waves can help to determine the power law index directly, which will distinguish different inflationary models. This opens up a new window for another glance at ''gravity's rainbow''. RP CHEN, PS (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 29 TC 3 Z9 3 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0001-7701 J9 GEN RELAT GRAVIT JI Gen. Relativ. Gravit. PD NOV PY 1995 VL 27 IS 11 BP 1129 EP 1135 DI 10.1007/BF02108228 PG 7 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TE089 UT WOS:A1995TE08900001 ER PT J AU KRAUSS, LM TURNER, MS AF KRAUSS, LM TURNER, MS TI THE COSMOLOGICAL CONSTANT IS BACK SO GENERAL RELATIVITY AND GRAVITATION LA English DT Article ID UNIVERSE; CLUSTERS; SCALE; AGE AB A diverse set of observations now compellingly suggest that the universe possesses a nonzero cosmological constant. In the context of quantum-field theory a cosmological constant corresponds to the energy density of the vacuum, and the favored value for the cosmological constant corresponds to a very tiny vacuum energy density. We discuss future observational tests for a cosmological constant as well as the fundamental theoretical challenges - and opportunities - that this poses for particle physics and for extending our understanding of the evolution of the universe back to the earliest moments. C1 CASE WESTERN RESERVE UNIV,DEPT ASTRON,CLEVELAND,OH 44106. UNIV CHICAGO,ENRICO FERMI INST,DEPT PHYS,CHICAGO,IL 60637. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON,CHICAGO,IL 60637. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTROPHYS,CHICAGO,IL 60637. FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. RP KRAUSS, LM (reprint author), CASE WESTERN RESERVE UNIV,DEPT PHYS,CLEVELAND,OH 44106, USA. NR 29 TC 260 Z9 263 U1 2 U2 13 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0001-7701 J9 GEN RELAT GRAVIT JI Gen. Relativ. Gravit. PD NOV PY 1995 VL 27 IS 11 BP 1137 EP 1144 DI 10.1007/BF02108229 PG 8 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TE089 UT WOS:A1995TE08900002 ER PT J AU LAMERDIN, JE ATHWAL, RS KANSARA, MS SANDHU, AK PATANJALI, SR WEISSMAN, SM CARRANO, AV AF LAMERDIN, JE ATHWAL, RS KANSARA, MS SANDHU, AK PATANJALI, SR WEISSMAN, SM CARRANO, AV TI CHROMOSOMAL LOCALIZATION AND EXPRESSED SEQUENCE TAG GENERATION OF CLONES FROM A NORMALIZED HUMAN ADULT THYMUS CDNA LIBRARY SO GENOME RESEARCH LA English DT Article ID HUMAN BRAIN; ASSIGNMENT; GENES AB Expressed sequence tags (ESTs) from 298 clones have been generated from a randomly primed, normalized human adult thymus cDNA library. We describe the chromosomal localization of 136 of these ESTs by PCR-based mapping to a human monochromosomal somatic cell hybrid panel. Data base similarities to known genes are also described. A subset (n = 18) of these randomly primed ESTs extended the sequence of ESTs from other tissues currently in dbEST. OF the nonrepetitive human adult thymus ESTs generated in this study, 237 (79.5%) have no similarity to current data base entries. This would suggest that our collection contains -100 new coding regions from thymus tissue, a large proportion of which likely will represent the middle regions of genes. The mapped ESTs should prove useful as new gene-based markers for mapping and candidate gene hunting, particularly when anchored to a well-developed physical map of the human genome. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94550. TEMPLE UNIV,SCH MED,FELS INST CANC RES & MOLEC BIOL,PHILADELPHIA,PA 19140. YALE UNIV,SCH MED,BOYER CTR MOLEC MED,NEW HAVEN,CT 06536. RP LAMERDIN, JE (reprint author), LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,L-452,LIVERMORE,CA 94550, USA. NR 16 TC 7 Z9 8 U1 0 U2 0 PU COLD SPRING HARBOR LAB PRESS PI PLAINVIEW PA 1 BUNGTOWN RD, PLAINVIEW, NY 11724 SN 1054-9803 J9 GENOME RES JI Genome Res. PD NOV PY 1995 VL 5 IS 4 BP 359 EP 367 DI 10.1101/gr.5.4.359 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA TK367 UT WOS:A1995TK36700004 PM 8750195 ER PT J AU ZACHARA, JM GASSMAN, PL SMITH, SC TAYLOR, D AF ZACHARA, JM GASSMAN, PL SMITH, SC TAYLOR, D TI OXIDATION AND ADSORPTION OF CO(II)EDTA(2-) COMPLEXES IN SUBSURFACE MATERIALS WITH IRON AND MANGANESE OXIDE GRAIN COATINGS SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Article ID CONSTANT CAPACITANCE MODEL; FERROMANGANESE NODULES; ANION COMPETITION; HYDROUS OXIDES; SURFACE; SOILS; GOETHITE; COBALT; OXYHYDROXIDE; BIRNESSITE AB Batch interaction experiments were performed under aerobic conditions to characterize the adsorption behavior and valence speciation of CoEDTA complexes (equimolar at 10(-5) mol/L) in a series of Pliocene subsurface sediments containing various amounts of Fe and Mn oxides. The experiments were performed in 0.003 mol/L Ca(ClO4)(2) with a solids concentration of 500 g/L at variable pH (4-9) and at the natural pH of the sediments (pH = 8.3). Three of these subaerial sediments (Ringold 1, 2, 3) contained significant quantities of extractable Fe and Mn, while the fourth (Ringold 4) was virtually devoid of sesquioxide precipitates. Microscopic and mineralogic analyses of the most heavily encrusted material (Ringold 2) showed that the oxides existed as intergrain cements and contained crystalline goethite and rancieite/todorokite. Adsorption on a synthetic analog sorbent (0.6 mass % ferrihydrite-coated sand) over a range in pH showed that, while both Co(II)EDTA(2-) and Co(III)EDTA(-) sorb as anions, the divalent Co complex forms stronger surface complexes with FeOH sites. In the subsurface sediments containing both Fe and Mn oxides, however, the sorption of Co(II)EDTA(2-) and Co(III)EDTA(-) was low and equivalent, suggesting transformation to a common valence form. Ion chromatography documented that Co(III)EDTA(-) was the equilibrium species and that the oxidation of Co (II)EDTA(2-) was rapid. Sorption of Co(II)EDTA(2-) in the Ringold 4 sediment was different: no oxidation was seen and Al-(aq)(3+), promoted dissociation of the complex. Sorption experiments with Co(III)EDTA(-) and Ni(II)EDTA(2-) on Ringold 2 sediment demonstrated that the natural Fe oxide fraction was a poor anion sorbent, in contrast to ferrihydrite coated sand. Experimental evidence suggests Co(II)EDTA(2-) remains intact during oxidation and that dissolved Si, and Si coreacted with the Fe oxides, influence MeEDTA sorption. It is concluded that Mn oxides could greatly accelerate the potential migration of CoEDTA complexes in subsurface systems. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP ZACHARA, JM (reprint author), PACIFIC NW LAB, CTR EARTH & ENVIRONM SCI, RICHLAND, WA 99352 USA. OI Smith, Sean/0000-0002-5679-8205 NR 58 TC 56 Z9 56 U1 0 U2 7 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 NOV PY 1995 VL 59 IS 21 BP 4449 EP 4463 DI 10.1016/0016-7037(95)99265-I PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TE485 UT WOS:A1995TE48500009 ER PT J AU CHIARELLO, RP STURCHIO, NC AF CHIARELLO, RP STURCHIO, NC TI THE CALCITE (10(1)OVER-BAR-4) CLEAVAGE SURFACE IN WATER - EARLY RESULTS OF A CRYSTAL TRUNCATION ROD STUDY SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Letter ID X-RAY REFLECTIVITY; FORCE MICROSCOPY; MODEL; DISSOLUTION; MECHANISMS; ADSORPTION; INTERFACE; GROWTH AB This paper introduces the application of the crystal truncation rod (CTR) technique to the study of mineral-fluid interfaces. The CTR of the calcite (10 (1) over bar 4) cleavage surface in contact with a calcite-saturated aqueous solution was measured as a function of time by using synchrotron X-ray radiation. These results are consistent with the presence of steps of monomolecular height (3.04 Angstrom high) separated by terrace areas, as observed in previous atomic force microscope studies of the calcite surface. We found that the step density decreased with time of exposure to solution, implying that the surface healed by migration and annihilation of monomolecular steps. An atomic model of the CTR measurements of the healed surface indicates that the atomic structure of the cleavage surface is not measurably different than that of (10 (1) over bar 4) crystallographic planes within the crystal and the root mean square roughness of the terrace areas between steps is 0.35 +/- 0.1 Angstrom. Higher resolution CTR measurements could reveal exact atomic positions of the calcite surface and the structure of aqueous fluids in the interfacial region. RP CHIARELLO, RP (reprint author), ARGONNE NATL LAB, DEPT GEOSCI, CMT-205, ARGONNE, IL 60439 USA. NR 25 TC 35 Z9 35 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 EI 1872-9533 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD NOV PY 1995 VL 59 IS 21 BP 4557 EP 4561 DI 10.1016/0016-7037(95)00363-5 PG 5 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TE485 UT WOS:A1995TE48500015 ER PT J AU PALMER, DA BELL, JLS AF PALMER, DA BELL, JLS TI ALUMINUM SPECIATION AND EQUILIBRIA IN AQUEOUS-SOLUTION .4. A POTENTIOMETRIC STUDY OF ALUMINUM ACETATE COMPLEXATION IN ACIDIC NACL BRINES TO 150-DEGREES-C - REPLY SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Note ID TEMPERATURES; HYDROLYSIS; CONSTANTS RP PALMER, DA (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,BLDG 4500S,POB 2008,OAK RIDGE,TN 37831, USA. NR 17 TC 3 Z9 3 U1 0 U2 0 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 NOV PY 1995 VL 59 IS 22 BP 4781 EP 4784 DI 10.1016/0016-7037(95)00312-6 PG 4 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TH383 UT WOS:A1995TH38300018 ER PT J AU NEWMAN, GA ALUMBAUGH, DL AF NEWMAN, GA ALUMBAUGH, DL TI FREQUENCY-DOMAIN MODELING OF AIRBORNE ELECTROMAGNETIC RESPONSES USING STAGGERED FINITE-DIFFERENCES SO GEOPHYSICAL PROSPECTING LA English DT Article ID LINEAR-SYSTEMS; BODY AB A 3D frequency-domain EM modelling code has been implemented for helicopter electromagnetic (HEM) simulations. A vector Helmholtz equation for the electric fields is employed to avoid convergence problems associated with the first-order Maxwell's equations when air is present. Additional stability is introduced by formulating the problem in terms of the scattered electric fields. With this formulation the impressed dipole source is replaced with an equivalent source, which for the airborne configuration possesses a smoother spatial dependence and is easier to model. In order to compute this equivalent source, a primary field arising from dipole sources of either a whole space or a layered half-space must be calculated at locations where the conductivity is different from that of the background. The Helmholtz equation is approximated using finite differences on a staggered grid. After finite-differencing, a complex-symmetric matrix system of equations is assembled and preconditioned using Jacobi scaling before it is solved using the quasi-minimum residual (QMR) method. The modelling code has been compared with other 1D and 3D numerical models and is found to produce results in good agreement. We have used the solution to simulate novel HEM responses that are computationally intractable using integral equation (IE) solutions. These simulations include a 2D conductor residing at a fault contact with and without topography. Our simulations show that the quadrature response is a very good indicator of the faulted background, while the in-phase response indicates the presence of the conductor. However when interpreting the in-phase response, it is possible erroneously to infer a dipping conductor due to the contribution of the faulted background. RP NEWMAN, GA (reprint author), SANDIA NATL LABS,ORG 6116,MS-0750,POB 5800,ALBUQUERQUE,NM 87185, USA. RI Newman, Gregory/G-2813-2015 NR 20 TC 138 Z9 157 U1 0 U2 11 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0016-8025 J9 GEOPHYS PROSPECT JI Geophys. Prospect. PD NOV PY 1995 VL 43 IS 8 BP 1021 EP 1042 DI 10.1111/j.1365-2478.1995.tb00294.x PG 22 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TF168 UT WOS:A1995TF16800003 ER PT J AU MCGRAW, R HUANG, PI SCHWARTZ, SE AF MCGRAW, R HUANG, PI SCHWARTZ, SE TI OPTICAL-PROPERTIES OF ATMOSPHERIC AEROSOLS FROM MOMENTS OF THE PARTICLE-SIZE DISTRIBUTION SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID LIQUID WATER-CONTENT; EXTINCTION; CLOUDS AB The method of moments is a powerful tool for directly calculating the lower-order moments of an aerosol size distribution without full knowledge of the distribution itself. These moments can be tracked in space and time to represent the effects of nucleation, evaporation and growth, coagulation, and complex flowfield dynamics. This letter applies quadrature methods for efficient estimation of aerosol optical properties directly from a known moment sequence. The approach is demonstrated using particle size distributions obtained from fits to field measurements. Comparison of light-scattering phase functions and other integral optical properties calculated from the moments with those obtained from the full distributions shows that the lower-order moments lead to an efficient and accurate parametrization for these properties. RP MCGRAW, R (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV ENVIRONM CHEM,UPTON,NY 11973, USA. RI Schwartz, Stephen/C-2729-2008 OI Schwartz, Stephen/0000-0001-6288-310X NR 14 TC 22 Z9 22 U1 0 U2 2 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 NOV 1 PY 1995 VL 22 IS 21 BP 2929 EP 2932 DI 10.1029/95GL02472 PG 4 WC Geosciences, Multidisciplinary SC Geology GA TE108 UT WOS:A1995TE10800012 ER PT J AU VASCO, DW PETERSON, JE MAJER, EL AF VASCO, DW PETERSON, JE MAJER, EL TI BEYOND RAY TOMOGRAPHY - WAVEPATHS AND FRESNEL VOLUMES SO GEOPHYSICS LA English DT Article ID DIFFRACTION TOMOGRAPHY; TRAVELTIME INVERSION; RECONSTRUCTION AB Two techniques that account for the band-limited nature of seismic data are incorporated into tomographic traveltime inversion schemes. The first technique, the wavepath algorithm, is based upon the wave equation, the Born approximation, and an adjoint method for computing Frechet derivatives. Computation of a single wavepath requires the forward propagation of the seismic wavefield, as well as the reverse propagation of a residual wavefield. The second technique, the Fresnel volume approach, is based upon the paraxial ray approximation. The Fresnel volume algorithm requires little more computation than does conventional ray tracing and an order of magnitude less computer time than our calculation of wavepaths. When the Fresnel volume sensitivity functions are normalized by the area of the Fresnel ellipse perpendicular to the ray, the sensitivity estimates are very similar to the wavepaths. In particular, there is heightened sensitivity to velocity structure near the source and receiver locations. The normalization by the Fresnel ellipse area is necessary to ensure ray theoretical results in the limit of infinite frequency. Tomographic inversion based upon wavepaths or Fresnel volumes is more appropriate when considering the arrival time of the peak of the initial pulse rather than the first-arrival time. Furthermore, using the traveltime of the peak instead of the first-arrival time reduces the bias of tomograms to high velocity anomalies. The raypath, wavepath, and Fresnel volume techniques were applied to a set of cross-borehole traveltime observations gathered at the Grimsel Rock Laboratory. All methods imaged a low velocity fracture zone in the granitic site, in agreement with independent well information. Estimates of model parameter resolution are similar for the wavepath and Fresnel volume schemes. The source-receiver regions are the most well resolved areas. However, the model parameter resolution computed using a conventional ray-based formalism is more evenly distributed over the cross-borehole area. RP VASCO, DW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR COMPUTAT SEISMOL,1 CYCLOTRON RD,BLDG 50E,BERKELEY,CA 94720, USA. RI Vasco, Donald/I-3167-2016 OI Vasco, Donald/0000-0003-1210-8628 NR 32 TC 57 Z9 68 U1 0 U2 7 PU SOC EXPLORATION GEOPHYSICISTS PI TULSA PA 8801 S YALE ST, TULSA, OK 74137 SN 0016-8033 J9 GEOPHYSICS JI Geophysics PD NOV-DEC PY 1995 VL 60 IS 6 BP 1790 EP 1804 DI 10.1190/1.1443912 PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TB818 UT WOS:A1995TB81800018 ER PT J AU FEI, T LARNER, K AF FEI, T LARNER, K TI ELIMINATION OF NUMERICAL DISPERSION IN FINITE-DIFFERENCE MODELING AND MIGRATION BY FLUX-CORRECTED TRANSPORT SO GEOPHYSICS LA English DT Article ID ACOUSTIC-WAVE EQUATION AB Finite-difference acoustic-wave modeling and reverse-time depth migration based on the full wave equation are general approaches that can take into account arbitrary variations in velocity and density and can handle turning waves as well. However, conventional finite-difference methods for solving the acoustic- or elastic-wave equation suffer from numerical dispersion when too few samples per wavelength are used. The flux-corrected transport (FCT) algorithm, adapted from hydrodynamics, reduces the numerical dispersion in finite-difference wavefield continuation. The flux-correction procedure endeavors to incorporate diffusion into the wavefield continuation process only where needed to suppress the numerical dispersion. Incorporating the flux-correction procedure in conventional finite-difference modeling or reverse-time migration can provide finite-difference solutions with no numerical dispersion even for impulsive sources. The FCT correction, which can be applied to finite-difference approximations of any order in space and time, is an efficient alternative to use for finite-difference approximations of increasing order. Through demonstrations of modeling and migration on both synthetic and field data, we show the benefits of the FCT algorithm, as well as its inability to fully recover resolution lost when the spatial sampling becomes too coarse. C1 COLORADO SCH MINES, CTR WAVE PHENOMENA, DEPT MATH & COMP SCI, GOLDEN, CO 80401 USA. COLORADO SCH MINES, CTR WAVE PHENOMENA, DEPT GEOPHYS, GOLDEN, CO 80401 USA. RP LOS ALAMOS NATL LAB, DIV EARTH & ENVIRONM SCI, LOS ALAMOS, NM 87545 USA. NR 18 TC 60 Z9 75 U1 1 U2 4 PU SOC EXPLORATION GEOPHYSICISTS PI TULSA PA 8801 S YALE ST, TULSA, OK 74137 USA SN 0016-8033 EI 1942-2156 J9 GEOPHYSICS JI Geophysics PD NOV-DEC PY 1995 VL 60 IS 6 BP 1830 EP 1842 DI 10.1190/1.1443915 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TB818 UT WOS:A1995TB81800021 ER PT J AU KEARFOTT, K STABIN, M AF KEARFOTT, K STABIN, M TI MEDICAL USES OF RADIATION - THE FIRST 100 YEARS IN REVIEW SO HEALTH PHYSICS LA English DT Editorial Material C1 OAK RIDGE ASSOCIATED UNIV, OAK RIDGE, TN 37831 USA. RP KEARFOTT, K (reprint author), UNIV MICHIGAN, DEPT NUCL ENGN, COOLEY LAB 108, N CAMPUS, ANN ARBOR, MI 48109 USA. RI Kearfott, Kimberlee/G-2467-2014 OI Kearfott, Kimberlee/0000-0002-8698-0913 NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD NOV PY 1995 VL 69 IS 5 BP 609 EP 609 PG 1 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 TA722 UT WOS:A1995TA72200001 ER PT J AU STELSON, ATS WATSON, EE CLOUTIER, RJ AF STELSON, ATS WATSON, EE CLOUTIER, RJ TI A HISTORY OF MEDICAL INTERNAL DOSIMETRY SO HEALTH PHYSICS LA English DT Article DE DOSIMETRY, INTERNAL; DOSE, ABSORBED; DOSE ASSESSMENT; RADIATION, MEDICAL AB This paper presents a short history of the development of medical internal dosimetry. It reviews the evolution of the equations and discusses the development of various mathematical models used to improve radiation absorbed dose estimates. The contributions of Leonidas Marinelli, Edith Quimby, William Mayneord, Robert Loevinger, Waiter Snyder, and others are emphasized. RP STELSON, ATS (reprint author), OAK RIDGE INST SCI & EDUC, OAK RIDGE, TN 37831 USA. NR 74 TC 7 Z9 7 U1 0 U2 4 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 NOV PY 1995 VL 69 IS 5 BP 766 EP 782 DI 10.1097/00004032-199511000-00011 PG 17 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 TA722 UT WOS:A1995TA72200012 ER PT J AU KALLMAN, JS DEGROOT, AJ HOOVER, CG HOOVER, WG LEE, SM WOOTEN, F AF KALLMAN, JS DEGROOT, AJ HOOVER, CG HOOVER, WG LEE, SM WOOTEN, F TI VISUALIZATION TECHNIQUES FOR MOLECULAR-DYNAMICS SO IEEE COMPUTER GRAPHICS AND APPLICATIONS LA English DT Article ID DIFFRACTION PATTERNS; SIMULATION; ELECTRON C1 LAWRENCE UNIV,APPLETON,WI 54912. UNIV CALIF DAVIS,DAVIS,CA 95616. RP KALLMAN, JS (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0272-1716 J9 IEEE COMPUT GRAPH JI IEEE Comput. Graph. Appl. PD NOV PY 1995 VL 15 IS 6 BP 72 EP 77 DI 10.1109/38.469512 PG 6 WC Computer Science, Software Engineering SC Computer Science GA TA677 UT WOS:A1995TA67700013 ER PT J AU ROBBINS, RJ AF ROBBINS, RJ TI INFORMATION INFRASTRUCTURE SO IEEE ENGINEERING IN MEDICINE AND BIOLOGY MAGAZINE LA English DT Article C1 US DOE,OFF HLTH & ENVIRONM RES,WASHINGTON,DC 20585. NR 0 TC 6 Z9 6 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 0739-5175 J9 IEEE ENG MED BIOL JI IEEE Eng. Med. Biol. Mag. PD NOV-DEC PY 1995 VL 14 IS 6 BP 746 EP 759 DI 10.1109/51.473269 PG 14 WC Engineering, Biomedical; Medical Informatics SC Engineering; Medical Informatics GA TE830 UT WOS:A1995TE83000018 ER PT J AU CHOQUETTE, KD LEAR, KL SCHNEIDER, RP GEIB, KM FIGIEL, JJ HULL, R AF CHOQUETTE, KD LEAR, KL SCHNEIDER, RP GEIB, KM FIGIEL, JJ HULL, R TI FABRICATION AND PERFORMANCE OF SELECTIVELY OXIDIZED VERTICAL-CAVITY LASERS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID WELL HETEROSTRUCTURE LASERS AB We report the high yield fabrication and reproducible performance of selectively oxidized vertical-cavity surface emitting lasers. We show that linear oxidation rates of AlGaAs without an induction period allows reproducible fabrication of buried oxide current apertures within monolithic distributed Bragg reflectors. The oxide layers do not induce obvious crystalline defects, and continuous wave operation in excess of 650 h has been obtained. The high yield fabrication enables relatively high laser performance over a wide wavelength span, We observe submilliamp threshold currents over a wavelength range of up to 75 nm, and power conversion efficiencies at 1 mW output power of greater than 20% over a 50-nm wavelength range. C1 UNIV VIRGINIA,DEPT MAT SCI,CHARLOTTESVILLE,VA 22903. RP CHOQUETTE, KD (reprint author), SANDIA NATL LABS,DEPT PHOTON RES,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 16 TC 78 Z9 79 U1 0 U2 3 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 NOV PY 1995 VL 7 IS 11 BP 1237 EP 1239 DI 10.1109/68.473457 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA TE027 UT WOS:A1995TE02700005 ER PT J AU FRITZ, IJ KLEM, JF HAFICH, MJ HOWARD, AJ HJALMARSON, HP AF FRITZ, IJ KLEM, JF HAFICH, MJ HOWARD, AJ HJALMARSON, HP TI BROAD-BAND LIGHT-EMITTING DIODE FOR 1.4-2.0 MU-M USING VARIABLE-COMPOSITION INGAAS QUANTUM-WELLS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB We describe a novel broad-band light-emitting diode employing InGaAs quantum wells with different bandgaps. The device structures were grown by molecular-beam epitaxy on InP substrates and consist of three InxGa1-xAs quantum webs (x = 0.4, 0.53, and 0.66) imbedded in the p-doped region of an InAlAs p-n junction diode. Electrons injected into the p-region are captured into the webs and recombine with holes to produce radiation at the three bandgap wavelengths. Broad-band emission over a large wavelength range (1.4-2.0 mu m) is easily achieved with this approach. These novel solid-state sources have a variety of potential applications, for example, in miniature spectrometer and sensor systems. RP FRITZ, IJ (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 6 TC 7 Z9 7 U1 0 U2 3 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 NOV PY 1995 VL 7 IS 11 BP 1270 EP 1272 DI 10.1109/68.473468 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA TE027 UT WOS:A1995TE02700016 ER PT J AU ARATA, LK DHAWAN, AP BRODERICK, JP GASKILSHIPLEY, MF LEVY, AV VOLKOW, ND AF ARATA, LK DHAWAN, AP BRODERICK, JP GASKILSHIPLEY, MF LEVY, AV VOLKOW, ND TI 3-DIMENSIONAL ANATOMICAL MODEL-BASED SEGMENTATION OF MR BRAIN IMAGES THROUGH PRINCIPAL AXES REGISTRATION SO IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING LA English DT Article ID CEREBROSPINAL-FLUID VOLUMES; CEREBRAL GRAY-MATTER; MEDICAL IMAGES; PET; CLASSIFICATION; VALIDATION; DEMENTIA; ATLAS; HEAD AB Model-based segmentation and analysis of brain images depends on anatomical knowledge which may be derived from conventional atlases. Classical anatomical atlases are based on the rigid spatial distribution provided by a single cadaver. Their use to segment internal anatomical brain structures in a high-resolution MR brain image does not provide any knowledge about the subject variability, and therefore they are not very efficient in analysis, We present a method to develop three-dimensional computerized composite models of brain structures to build a computerized anatomical atlas, The composite models are developed using the real MR brain images of human subjects which are registered through the Principal Axes Transformation, The composite models provide probabilistic spatial distributions, which represent the variability of brain structures and can be easily updated for additional subjects, We demonstrate the use of such a composite model of ventricular structure to help segmentation of the ventricles and Cerebrospinal Fluid (CSF) of MR brain images, In this paper, a composite model of ventricles using a set of 22 human subjects is developed and used in a model-based segmentation of ventricles, sulci, and white matter lesions. To illustrate the clinical usefulness, automatic volumetric measurements on ventricular size and cortical atrophy for an additional eight alcoholics and 10 normal subjects were made. The volumetric quantitative results indicated regional brain atrophy in chronic alcoholics. C1 UNIV CINCINNATI,DEPT ELECT & COMP ENGN & RADIOL,CINCINNATI,OH 45221. UNIV CINCINNATI,DEPT NEUROL,CINCINNATI,OH 45221. UNIV CINCINNATI,DEPT NEURORADIOL,CINCINNATI,OH 45221. BROOKHAVEN NATL LAB,UPTON,NY 11973. FU NIMH NIH HHS [MH44832] NR 43 TC 23 Z9 24 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9294 J9 IEEE T BIO-MED ENG JI IEEE Trans. biomed. Eng. PD NOV PY 1995 VL 42 IS 11 BP 1069 EP 1078 DI 10.1109/10.469373 PG 10 WC Engineering, Biomedical SC Engineering GA TB575 UT WOS:A1995TB57500003 PM 7498910 ER PT J AU DHAWAN, AP ARATA, LK LEVY, AV MANTIL, J AF DHAWAN, AP ARATA, LK LEVY, AV MANTIL, J TI ITERATIVE PRINCIPAL AXES REGISTRATION METHOD FOR ANALYSIS OF MR-PET BRAIN IMAGES SO IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING LA English DT Article ID POSITRON EMISSION TOMOGRAPHY; CT AB Computerized automatic registration of MR-PET images of the brain is of significant interest for multimodality brain image analysis, In this paper, we discuss the Principal Axes Transformation for registration of three-dimensional MR and PET images, A new brain phantom designed to test MR-PET registration accuracy determines that the Principal Axes Registration method is accurate to within an average of 1.37 mm with a standard deviation of 0.78 mm, Often the PET scans are not complete in the sense that the PET volume does not match the respective MR volume. We have developed an Iterative Principal Axes Registration (IPAR) algorithm for such cases, Partial volumes of PET can be accurately registered to the complete MR volume using the new iterative algorithm. The quantitative and qualitative analyses of MR-PET image registration are presented and discussed. Results show that the new Principal Axes Registration algorithm is accurate and practical in MR-PET correlation studies. C1 KETTERING MED CTR,DEPT MAGNET RESONANCE IMAGING,KETTERING,OH 45429. KETTERING MED CTR,DEPT NUCL MED,KETTERING,OH 45429. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP DHAWAN, AP (reprint author), UNIV CINCINNATI,DEPT ELECT & COMP ENGN & RADIOL,CINCINNATI,OH 45221, USA. FU NIMH NIH HHS [MH44832] NR 23 TC 21 Z9 21 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9294 J9 IEEE T BIO-MED ENG JI IEEE Trans. biomed. Eng. PD NOV PY 1995 VL 42 IS 11 BP 1079 EP 1087 DI 10.1109/10.469374 PG 9 WC Engineering, Biomedical SC Engineering GA TB575 UT WOS:A1995TB57500004 PM 7498911 ER PT J AU TUCKERMAN, DB AF TUCKERMAN, DB TI FOREWORD - MULTICHIP MODULES SO IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY PART B-ADVANCED PACKAGING LA English DT Editorial Material C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP TUCKERMAN, DB (reprint author), STANFORD UNIV,IBM CORP,TJ WATSON RES CTR,STANFORD,CA 94305, USA. NR 0 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 1070-9894 J9 IEEE T COMPON PACK B JI IEEE Trans. Compon. Packag. Manuf. Technol. Part B-Adv. Packag. PD NOV PY 1995 VL 18 IS 4 BP 600 EP 600 PG 1 WC Engineering, Manufacturing; Engineering, Electrical & Electronic; Materials Science, Multidisciplinary SC Engineering; Materials Science GA TF017 UT WOS:A1995TF01700001 ER PT J AU BHUSHAN, B GUPTA, BK SUNDARAM, R DEY, S ANDERS, S ANDERS, A BROWN, IG READER, PD AF BHUSHAN, B GUPTA, BK SUNDARAM, R DEY, S ANDERS, S ANDERS, A BROWN, IG READER, PD TI DEVELOPMENT OF HARD CARBON COATINGS FOR THIN-FILM TAPE HEADS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 33rd Annual Intermag Conference CY APR 18-21, 1995 CL SAN ANTONIO, TX AB Major problems in thin-film recording heads are pole tip/gap recession in the inductive head and scratching/smearing, electrical short, electrostatic charge build up, and corrosion of the MR stripe in the MR heads. Wear of head structure can be minimized by depositing a hard carbon coating over the entire ABS including the head structure. In this study, we have deposited carbon coatings on Ni-Zn ferrite and Al2O3-TiC substrates and dummy heads by various deposition techniques and characterized for mechanical and tribological properties, Ion beam carbon coatings on Ni-Zn ferrite and cathodic are carbon coatings on Al2O3-TiC heads exhibit most wear resistance compared to other coatings in a tape drive test. C1 STORAGE TECHNOL CORP,LOUISVILLE,CO 80028. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. ION TECH INC,FT COLLINS,CO 80525. RP BHUSHAN, B (reprint author), OHIO STATE UNIV,DEPT MECH ENGN,COLUMBUS,OH 43210, USA. RI Bhushan, Bharat/A-9684-2013; Anders, Andre/B-8580-2009; Raoux, Simone/G-3920-2016 OI Bhushan, Bharat/0000-0001-7161-6601; Anders, Andre/0000-0002-5313-6505; NR 5 TC 10 Z9 10 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 2976 EP 2978 DI 10.1109/20.490208 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD556 UT WOS:A1995TD55600123 ER PT J AU SIMION, BM THOMAS, G RAMESH, R AF SIMION, BM THOMAS, G RAMESH, R TI MAGNETIC AND MAGNETOOPTICAL PROPERTIES OF Y3FE5O12/EU1BI2FE5O12 HETEROSTRUCTURES SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 33rd Annual Intermag Conference CY APR 18-21, 1995 CL SAN ANTONIO, TX ID IRON-GARNET FILMS AB Superlattice heterostructures consisting of alternating single crystalline ferrimagnetic yttrium-iron-garnet (YIG) and Eu-substituted-bismuth-iron garnet (EBIG) thin films, deposited on [111] oriented single crystalline gadolinium-gallium-garnet substrates, show an increase in coercivity and Kerr rotation with the thickness ratio between the EBIG and the YIG layers. The substitution of one Eu+3 ion per unit formula also induces the change in easy magnetization direction from in-plane to out-of-plane for all the EBIG/YIG films. C1 LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. UNIV MARYLAND,DEPT MAT & NUCL ENGN,COLLEGE PK,MD 20742. UNIV MARYLAND,CTR SUPERCOND RES,COLLEGE PK,MD 20742. RP SIMION, BM (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & ENGN,BERKELEY,CA 94720, USA. NR 10 TC 1 Z9 1 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 3242 EP 3244 DI 10.1109/20.490336 PN 1 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD556 UT WOS:A1995TD55600205 ER PT J AU LEWIS, LH SELLERS, CH PANCHANATHAN, V AF LEWIS, LH SELLERS, CH PANCHANATHAN, V TI PHASE-COMPOSITION AND MAGNETIC CHARACTERISTICS OF INERT GAS-ATOMIZED RE-FE-B-BASED POWDERS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 1995 IEEE International Magnetics Conference (INTERMAG 95) CY APR 18-21, 1995 CL SAN ANTONIO, TX SP IEEE AB Microstructure, phase constitution and temperature-dependent magnetic properties are examined for two size fractions of as-quenched RE-Nd-B-based powder produced by inert gas atomization for possible use as isotropic bonded magnet precursors, The atomized powders consist of the phase (Nd,Dy)(2)Fe14B with minute amounts of RE(2)O(3) and gamma-Fe2O3. Evidence of compositional segregation with particle size is seen, Room-temperature magnetic properties are H-ci=12kOe and B-R=5.4 kG for the 10-20 mu m portion, H-ci=1.8 kOe and B-R=3 kG for the 100-150 mu m portion. C1 LOCKHEED IDAHO TECHNOL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. MAGNEQUENCH,PROD ENGN,ANDERSON,IN 46013. RP LEWIS, LH (reprint author), BROOKHAVEN NATL LAB,DIV MAT SCI,UPTON,NY 11973, USA. NR 5 TC 5 Z9 5 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 3641 EP 3643 DI 10.1109/20.489595 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD558 UT WOS:A1995TD55800064 ER PT J AU MITRA, A JILES, DC AF MITRA, A JILES, DC TI EFFECTS OF TENSILE-STRESS ON THE MAGNETIC BARKHAUSEN EFFECT IN 2605-CO-AMORPHOUS-ALLOY SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 1995 IEEE International Magnetics Conference (INTERMAG 95) CY APR 18-21, 1995 CL SAN ANTONIO, TX SP IEEE AB A study of the magnetic Barkhausen effect emissions in 2605 CO amorphous alloys has been made. These emissions, which appear as magnetization pulses in the material, can be detected by a pick-up coil and analyzed in a variety of ways. In this study the Barkhausen effect signals were found to be dependent on both magnetic field and applied tensile stress. This dependence was in accordance with a theoretical model of the Barkhausen effect developed previously. The analysis and modeling of the resulting behavior was found to be particularly simple because amorphous alloys have no crystalline anisotropy, and therefore the effects of stress on the Barkhausen emissions were not masked by competing effects. RP MITRA, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 5 TC 5 Z9 5 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 4020 EP 4022 DI 10.1109/20.489848 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD558 UT WOS:A1995TD55800188 ER PT J AU CHEN, ZJ NEGLEY, M JILES, DC SABLIK, MJ AF CHEN, ZJ NEGLEY, M JILES, DC SABLIK, MJ TI IMPROVEMENT OF MAGNETIC INTERFACE COUPLING THROUGH A MAGNETIC COUPLING GEL SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 1995 IEEE International Magnetics Conference (INTERMAG 95) CY APR 18-21, 1995 CL SAN ANTONIO, TX SP IEEE AB Surface measurement of magnetic properties is potentially a very advantageous technique for nondestructive evaluation. The effect of a magnetic coupling gel on surface magnetic measurement, is reported in this paper. Test results under three interface conditions are presented and compared. It was found that the magnetic gel reduces the variability of the measurement by improving the magnetic interface coupling between the sensor and test specimen. A simple model of a magnetic circuit is analyzed to show the coupling function of magnetic gel. From these results, it is deduced that the magnetic coupling gel plays an important part in improving reliability of the magnetic measurements. C1 IOWA STATE UNIV SCI & TECHNOL,CTR NDE,AMES,IA 50011. SW RES INST,SAN ANTONIO,TX 78228. RP CHEN, ZJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012 NR 4 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 4029 EP 4031 DI 10.1109/20.489851 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD558 UT WOS:A1995TD55800191 ER PT J AU MITRA, A GOVINDARAJU, MR JILES, DC AF MITRA, A GOVINDARAJU, MR JILES, DC TI INFLUENCE OF MICROSTRUCTURE ON MICROMAGNETIC BARKHAUSEN EMISSIONS IN AISI-4140 STEEL SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 1995 IEEE International Magnetics Conference (INTERMAG 95) CY APR 18-21, 1995 CL SAN ANTONIO, TX SP IEEE AB The effects of microstructure on the micromagnetic Barkhausen signal emissions in AISI 4140 steel ale reported. The Barkhausen signal amplitude is known to be highly sensitive to the type and distribution of microstructural inhomogeneities, such as grain boundaries, precipitates and dislocations. The Barkhausen measurements were taken on samples having pearlitic, spheroidized and bainitic microstructures. The Barkhausen emissions were measured in terms of rms voltage, peak-to-peak voltage and number of events per cycle. It is shown that Barkhausen signals can be used to distinguish between pearlitic and bainitic microstructures. C1 NATL MET LAB,MAGNET GRP,JAMSHEDPUR 831007,BIHAR,INDIA. RP MITRA, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Jiles, David/H-9548-2012; Sahu, Anjani/E-7590-2015 NR 12 TC 9 Z9 10 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 4053 EP 4055 DI 10.1109/20.489859 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD558 UT WOS:A1995TD55800199 ER PT J AU DAVEY, K MORRIS, T SHAAF, J ROTE, D AF DAVEY, K MORRIS, T SHAAF, J ROTE, D TI CALCULATION OF MOTION-INDUCED EDDY-CURRENT FORCES IN NULL FLUX COILS SO IEEE TRANSACTIONS ON MAGNETICS LA English DT Article; Proceedings Paper CT 1995 IEEE International Magnetics Conference (INTERMAG 95) CY APR 18-21, 1995 CL SAN ANTONIO, TX SP IEEE AB Time dependent motion induced eddy current forces can be quite difficult to compute. The movement of null flux coils between magnets is approached using a coupled boundary element - circuit approach to compute the forces on the structure. The technique involves treating the magnets as a separate circuit whose current is dictated by the product of the magnet thickness and the working coercivity, The mutual inductance between the windows of the moving null flux coil and the stationary equivalent magnet coil hold the key for predicting Lilt, guidance, and drag forces on the coil The rate of change of these inductances with respect to position determines the forces and currents. A steady state approximation to these forces is derived in addition to a numerical simulation when the steady state assumption is invalid. The results compare favorably to laboratory results from a 4' diameter experimental test wheel. C1 BDM FED INC,HUNTSVILLE,AL 35806. ARGONNE NATL LAB,ARGONNE,IL 60439. RP DAVEY, K (reprint author), AMER MAGLEV INC,POB 10,EDGEWATER,FL 32132, USA. NR 4 TC 3 Z9 3 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 0018-9464 J9 IEEE T MAGN JI IEEE Trans. Magn. PD NOV PY 1995 VL 31 IS 6 BP 4214 EP 4216 DI 10.1109/20.489930 PN 2 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA TD558 UT WOS:A1995TD55800251 ER PT J AU CHEN, T LIN, WC CHEN, CT AF CHEN, T LIN, WC CHEN, CT TI ARTIFICIAL NEURAL NETWORKS FOR 3-D MOTION ANALYSIS .1. RIGID MOTION SO IEEE TRANSACTIONS ON NEURAL NETWORKS LA English DT Article AB This paper proposes a new approach applying artificial neural network techniques to three-dimensional (3-D) rigid motion analysis based on sequential multiple time frames, The proposed approach consists of two phases: 1) matching between every two consecutive frames and 2) estimating motion parameters based on the correspondences established among all the frames, Phase one specifies the matching constraints to ensure a stable and coherent feature correspondence establishment between two sequential time frames and configures a two-dimensional (2-D) Hopfield neural network to enforce these constraints, Based on the feature correspondences established among all the frames, phase two constructs a three-layered neural network to estimate the motion parameters through a supervised learning process, The proposed approach differs from the previous works in several respects, First, it tackles the problem of motion analysis based on sequential multiple time frames, Conventional motion analysis, by contrast, is mostly based on two frames due to the complexity in computation when the number of frames increases, Second, this approach represents an effective way to achieve optimal matching solution between two frames using neural network techniques, The energy function of the Hopfield network is designed to reflect the matching constraints and the minimization of this function leads to the optimal feature correspondence establishment, Third, this approach introduces the learning concept to motion estimation, The structure of the proposed learning neural network provides the flexibility in estimating motion parameters based on information from multiple frames, Finally, this approach contributes to research fields of both motion analysis and neural network by presenting a new and fast-implemented framework for motion analysis based on multiple frames and proposing a unique neural network architecture and dynamics, Several experiments on both synthetic and real data are conducted to corroborate the proposed approach. C1 NORTHWESTERN UNIV,DEPT ELECT ENGN & COMP SCI,EVANSTON,IL 60208. UNIV CHICAGO,DEPT RADIOL,CHICAGO,IL 60637. RP CHEN, T (reprint author), ARGONNE NATL LAB,DIV DECIS & INFORMAT SCI,ARGONNE,IL 60439, USA. RI Lin, Wei-Chung/B-7248-2009 NR 13 TC 8 Z9 11 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 1045-9227 J9 IEEE T NEURAL NETWOR JI IEEE Trans. Neural Netw. PD NOV PY 1995 VL 6 IS 6 BP 1386 EP 1393 PG 8 WC Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA TC776 UT WOS:A1995TC77600008 PM 18263431 ER PT J AU CHEN, T LIN, WC CHEN, CT AF CHEN, T LIN, WC CHEN, CT TI ARTIFICIAL NEURAL NETWORKS FOR 3-D MOTION ANALYSIS .2. NONRIGID MOTION SO IEEE TRANSACTIONS ON NEURAL NETWORKS LA English DT Article ID RECOGNITION AB A novel approach of applying artificial neural network techniques to three-dimensional (3-D) nonrigid motion analysis is proposed. The research presented in this paper examines the 3-D nonrigid motion of the left ventricle of a human heart through use of biplanar cineangiography data, consisting of 3-D coordinates of 30 coronary artery bifurcation points of the left ventricle and the correspondences of these points taken over 10 time instants during the heart cardiac cycle, The 3-D nonrigid motion of the left ventricle of a heart can be decomposed into both a global rigid motion and a set of local nonrigid deformations, which are coupled with the global motion at every time instant [1]-[3], Using the artificial neural network techniques proposed in [4], the global rigid motion can be estimated precisely in the mathematic form of a translation vector and a rotation matrix. Estimation of the local nonrigid deformations will be discussed in this paper, A set of neural networks similar in structure and dynamics but different in physical size is proposed to tackle the problem of nonrigidity in the local deformation estimation, These neural networks are parallel in operation and connected to each other through feedbacks, Each network consists of an input layer and an output layer. The activation function of the output layer is selected in such a way that a feedback is involved id the output updating. The constraints are specified to ensure a stable and globally consistent estimation of local deformations. The constraints are incorporated into the network structure through the assignment of weights between two layers, the initial values of the outputs, as web as the connections between each network, The objective of the proposed neural networks is to find the optimal deformation matrices that satisfy the constraints for all the coronary artery bifurcation points of the left ventricle. The proposed neural networks differ from other existing neural network models in their unique structure and dynamics, Experiments on the biplanar cineangiography data are conducted to corroborate the proposed techniques. C1 NORTHWESTERN UNIV,DEPT ELECT ENGN & COMP SCI,EVANSTON,IL 60208. UNIV CHICAGO,DEPT RADIOL,CHICAGO,IL 60637. RP CHEN, T (reprint author), ARGONNE NATL LAB,DIV DECIS & INFORMAT SCI,CTR ADV COMP APPLICAT,ARGONNE,IL 60439, USA. RI Lin, Wei-Chung/B-7248-2009 NR 15 TC 6 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 1045-9227 J9 IEEE T NEURAL NETWOR JI IEEE Trans. Neural Netw. PD NOV PY 1995 VL 6 IS 6 BP 1394 EP 1401 PG 8 WC Computer Science, Artificial Intelligence; Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA TC776 UT WOS:A1995TC77600009 PM 18263432 ER PT J AU AVILA, J CONZELMANN, G RUIZ, J PIZARRO, C LLAMAS, I PONCE, J AF AVILA, J CONZELMANN, G RUIZ, J PIZARRO, C LLAMAS, I PONCE, J TI MITIGATION BASE-LINE SCENARIO FOR PERU ENERGY SECTOR SO INTERCIENCIA LA English DT Article DE PERU; CO2 EMISSIONS; MITIGATION OF GHG; ENERGY SECTOR; MITIGATION BASE-LINE SCENARIO AB The work discussed in this paper has been carried out as part of the Pent Climate Change County Study. The project is cosponsored by the U.S. Country Studies Program and uses the Energy and Power Evaluation Program (ENPEP) to project future greenhousegas (GHG) emission levels for Pent's mitigation base case. The paper describes Peru's energy system as an energy network and explains the underlying methodology and modeling assumptions for the network concept The energy network is composed of the entire energy system, including resource extraction and preparation, energy conversion, transmission, and distribution, and end-use demand sectors. The network also includes exports or imports. In projecting future GHG emissions, the study translates economic growth into energy demand projections, incorporates current and future government polices, accounts for availability of advanced C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NATL UNIV,ENGN ENVIRONM FAC ENGN,LIMA,PERU. RP AVILA, J (reprint author), INST PERUANO ENERGIA NUCL,AV CANADA 1470,LIMA,PERU. NR 9 TC 0 Z9 0 U1 0 U2 2 PU INTERCIENCIA PI CARACAS PA APARTADO 51842, CARACAS 1050A, VENEZUELA SN 0378-1844 J9 INTERCIENCIA JI Interciencia PD NOV-DEC PY 1995 VL 20 IS 6 BP 348 EP & PG 0 WC Ecology SC Environmental Sciences & Ecology GA TK173 UT WOS:A1995TK17300006 ER PT J AU MONGIA, P SATHAYE, J AF MONGIA, P SATHAYE, J TI MACROECONOMIC IMPLICATIONS OF CO2 MITIGATION IN VENEZUELA SO INTERCIENCIA LA English DT Article DE VENEZUELA; ENERGY EFFICIENCY; ENVIRONMENT; MACROECONOMIC MODEL AB This paper presents a conceptual framework for analyzing macroeconomic effects of green house gas mitigation policies. The analysis is conducted with the help of the LBL-CGE model. This is a multi-sector, computable general equilibrium model of an economy with energy and environment linkages. The model analyzes the interactive behavior of households, firms and government while incorporating the constraints imposed by the rest of the world. Dilemmas facing developing countries are addressed: should an additional dollar or bolivar be invested in increasing capacity in the energy sector or for improving energy efficiency? Which is a better alternative for reducing wasteful energy consumption: an increase in energy prices or investment in energy efficiency? This paper presents illustrative results on macroeconomic effects of price and investment policies for the energy sector in Venezuela. A major finding of the study is that investment in energy efficiency can help reduce energy consumption with significantly lower welfare losses or social sacrifices than those associated with traditional energy policies. C1 UNIV DELHI,DELHI SCH ECON,DELHI 110007,INDIA. RP MONGIA, P (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 8 TC 1 Z9 1 U1 0 U2 1 PU INTERCIENCIA PI CARACAS PA APARTADO 51842, CARACAS 1050A, VENEZUELA SN 0378-1844 J9 INTERCIENCIA JI Interciencia PD NOV-DEC PY 1995 VL 20 IS 6 BP 360 EP & PG 0 WC Ecology SC Environmental Sciences & Ecology GA TK173 UT WOS:A1995TK17300008 ER PT J AU STEWART, CW AF STEWART, CW TI BUBBLE INTERACTION IN LOW-VISCOSITY LIQUIDS SO INTERNATIONAL JOURNAL OF MULTIPHASE FLOW LA English DT Article; Proceedings Paper CT 2nd International Conference on Multiphase Flow CY APR 03-07, 1995 CL KYOTO, JAPAN DE BUBBLES; COALESCENCE; BREAKUP; BUBBLE SWARMS; TURBULENCE; BUBBLY FLOW ID VISCOUS-LIQUIDS; COALESCENCE; VELOCITIES; SHAPES; LINE AB An experimental study investigated how freely rising ellipsoidal bubbles approach each other, make contact and coalesce or breakup. Pulsed planar swarms of 10-20 bubbles with Eotvos numbers from 6.0 to 27.5 were released simultaneously in aqueous solutions of 0-48 wt% sugar with Morton numbers from 3.2 x 10(-11) to 3.7 x 10(-6). Bubble interaction was recorded by a video camera following the rising bubbles. Essentially, all coalescence and breakup events occurred after, not during, wake-induced collisions by a complex process related to the bubble vortex shedding cycle. This same process was also found in multi-bubble clusters and may account for excess turbulent kinetic energy generation in bubbly flow. RP STEWART, CW (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 25 TC 62 Z9 63 U1 2 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0301-9322 J9 INT J MULTIPHAS FLOW JI Int. J. Multiph. Flow PD NOV PY 1995 VL 21 IS 6 BP 1037 EP 1046 DI 10.1016/0301-9322(95)00030-2 PG 10 WC Mechanics SC Mechanics GA TE237 UT WOS:A1995TE23700006 ER PT J AU SCHRODER, E BUDZINSKI, EE WALLACE, JC ZIMBRICK, JD BOX, HC AF SCHRODER, E BUDZINSKI, EE WALLACE, JC ZIMBRICK, JD BOX, HC TI RADIATION-CHEMISTRY OF D(APCPGPT) SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY LA English DT Article ID INDUCED BASE PRODUCTS; DINUCLEOSIDE MONOPHOSPHATES; MAGNETIC-RESONANCE; SEQUENCE ISOMER; INDUCED LESIONS; INDUCED DAMAGE; DNA-DAMAGE; THYMIDINE; DERIVATIVES; D(TPAPCPG) AB The radiation chemistry of the DNA tetranucleoside triphosphate d(ApCpGpT) was investigated. Irradiations were carried out on aqueous solutions saturated with oxygen (with and without added Cu++), nitrogen or nitrous oxide. When oxygen was present, principal products were formed by hydroxylation at the 8-position of guanine and by degradation of thymine leaving a formamido remnant. Products were also formed containing both of the aforementioned lesions at adjacent deoxyguanosine and pyrimidine nucleosides. Other products resulted from rearrangement of the thymine ring generating two diastereoisomers of the 5-methyl-5-hydroxyhydantoin modification of d(ApCpGpT). Rearrangement of the cytosine ring occurred generating imidazolidine products and a hydantoin product. The product profiles are similar when either an N2O or N-2 gaseous environment is maintained. However, in the latter case the dihydrothymine modifications of d(ApCpGpT) are markedly enhanced. Other products include an 8,5' cyclized product formed from the 2'-deoxyadenosine nucleoside and the 8-hydroxyguanine modification. 6-Hydroxy-5,6-dihydrothymine and 5,6-dihydroxy-5,6-dihydrothymine modifications of the thymidine nucleoside were also observed. A strand break product formed in oxygenated solution is also produced in nitrous oxide saturated solutions. Scission of the deoxyadenosine terminus was also observed. The effect of several of these lesions on d(ApCpGpT) as substrate for nuclease P1, bovine spleen phosphodiesterase and snake venom phosphodiesterase was studied. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. ROSWELL PK CANC INST, DEPT BIOPHYS, BUFFALO, NY 14263 USA. FU NCI NIH HHS [CA46838, CA25027] NR 33 TC 24 Z9 24 U1 1 U2 4 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 NOV PY 1995 VL 68 IS 5 BP 509 EP 523 DI 10.1080/09553009514551501 PG 15 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 TH826 UT WOS:A1995TH82600002 PM 7490501 ER PT J AU LABINOV, SD SAND, JR AF LABINOV, SD SAND, JR TI AN ANALYTICAL METHOD OF PREDICTING LEE-KESLER-PLOCKER EQUATION-OF-STATE BINARY INTERACTION COEFFICIENTS SO INTERNATIONAL JOURNAL OF THERMOPHYSICS LA English DT Article DE COMPUTER ALGORITHM; BINARY INTERACTION COEFFICIENT; EQUATION OF STATE; MIXTURE; NONPOLAR AND POLAR SUBSTANCES; THERMODYNAMIC PROPERTIES; REDUCED PROPERTIES ID VAPOR-LIQUID-EQUILIBRIA; PVTX PROPERTIES; MIXTURES; SYSTEM AB An analytical method is proposed for finding numerical values of binary interaction coefficients for the Lee-Kesler-Plocker (LKP) equation of state. The method is based on solving simultaneous equations from Plocker's mixing rules for pseudocritical parameters of a mixture and the Lee-Kesler equation for the saturation line. For mixtures of hydrocarbons containing from two to nine carbon atoms, the divergence between calculated and experimentally based interaction coefficients (ICs) is no more than +/-0.4%. The method is extended to mixtures of polar substances. For polar mixtures, an effective molar composition concept is introduced which takes into account the impact of dipole moments on the process of molecular associations. Formulas for finding the effective molar composition of mixtures containing polar and/or nonpolar constituents and the binary interaction coefficient (kappa(ij)) based on this effective composition and pure component properties are shown. Calculated kappa(ij) values for 12 binary mixtures of polar substances differ by 0.4% or less from corresponding kappa(ij) values obtained by processing experimental data on saturated pressure (P-s) and saturated temperature (T-s) lines for these same mixtures. A simplified alternative kappa(ij) approximation method with an error (2-5%) is also given for mixtures of polar substances. C1 OAK RIDGE NATL LAB,DIV ENERGY,OAK RIDGE,TN 37831. THERMODYNAM CTR,KIEV,UKRAINE. NR 20 TC 3 Z9 3 U1 0 U2 3 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-928X J9 INT J THERMOPHYS JI Int. J. Thermophys. PD NOV PY 1995 VL 16 IS 6 BP 1393 EP 1411 DI 10.1007/BF02083548 PG 19 WC Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied SC Thermodynamics; Chemistry; Mechanics; Physics GA RY928 UT WOS:A1995RY92800006 ER PT J AU HERSHCOVITCH, A AF HERSHCOVITCH, A TI HIGH-PRESSURE ARCS AS VACUUM-ATMOSPHERE INTERFACE AND PLASMA LENS FOR NONVACUUM ELECTRON-BEAM WELDING MACHINES, ELECTRON-BEAM MELTING, AND NONVACUUM ION MATERIAL MODIFICATION SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Atmospheric pressure plasmas can be used to provide a vacuum-atmosphere interface as an alternative to differential pumping. Vacuum-atmosphere interface utilizing a cascade:arc discharge was successfully demonstrated and a 175 keV electron beam was successfully propagated from vacuum through such a plasma interface and out into atmospheric pressure. Included in the article are a theoretical framework, experimental,results, and possible applications for this novel interface. (C) 1995 American Institute of Physics. RP HERSHCOVITCH, A (reprint author), BROOKHAVEN NATL LAB,DEPT AGS,UPTON,NY 11973, USA. NR 20 TC 28 Z9 28 U1 2 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 1 PY 1995 VL 78 IS 9 BP 5283 EP 5288 DI 10.1063/1.359704 PG 6 WC Physics, Applied SC Physics GA TB545 UT WOS:A1995TB54500008 ER PT J AU TAYLOR, JA MERCHANT, SM PERRY, DL AF TAYLOR, JA MERCHANT, SM PERRY, DL TI STUDY OF THE OXIDATION OF GOLD-TIN PREFORMS USING X-RAY PHOTOELECTRON-SPECTROSCOPY SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID AUGER; ESCA AB This study uses x-ray photoelectron spectroscopy (XPS) to investigate the nature of the oxide formed on clean Au-Sn binary alloys (xi and delta phases) and on preforms with the eutectic composition (29 at % Sn) at low O-2 pressures (<10(-3) Torr) and at high O-2 pressures (up to one atmosphere) at temperatures ranging from room temperature to 200 degrees C. Sn Auger parameters and XPS angular-resolved data were obtained in addition to the core binding energies to identify the oxide layer. The oxidation of the Au-Sn alloys is basically similar to the oxidation of metallic Sn. The Auger parameter indicates that with low-pressure oxidation a layered oxide structure is formed consisting of SnO and a slightly tin-rich oxide at the interface. Probably a thin skin of Sn(IV) oxide exists on the outer surface of the low-pressure oxide. High-temperature and low-pressure promotes the growth of SnO. As the pressure is increased the Sn(IV) oxide grows more noticeably and with high-pressure oxidation the Sn(IV) oxide grows thicker than the Sn(II) oxide at the interface. The Sn(II) oxide at the interface appears similar to the Sn(II) oxide structure formed at low pressure. The Auger parameter indicates that the Sn(IV) oxide possesses a structure different than that of Cassiterite. (C) 1995 American Institute of Physics. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP TAYLOR, JA (reprint author), AT&T BELL LABS,9333 S JOHN YOUNG PKWY,ORLANDO,FL 32819, USA. NR 11 TC 13 Z9 13 U1 2 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 1 PY 1995 VL 78 IS 9 BP 5356 EP 5361 DI 10.1063/1.359715 PG 6 WC Physics, Applied SC Physics GA TB545 UT WOS:A1995TB54500020 ER PT J AU YU, N WEN, QZ CLARKE, DR MCINTYRE, PC KUNG, H NASTASI, M SIMPSON, TW MITCHELL, IV LI, DQ AF YU, N WEN, QZ CLARKE, DR MCINTYRE, PC KUNG, H NASTASI, M SIMPSON, TW MITCHELL, IV LI, DQ TI FORMATION OF IRON OR CHROMIUM-DOPED EPITAXIAL SAPPHIRE THIN-FILMS ON SAPPHIRE SUBSTRATES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ION-IMPLANTATION; REDUCING ATMOSPHERES; AL2O3; ALPHA-AL2O3 AB This work summarizes results of a simple procedure to incorporate dopants into the near surface region of single-crystal sapphire. We demonstrate the formation of iron-doped and chromium-doped sapphire thin films by solid-phase epitaxial growth. Amorphous alumina films of about 200-350 nm thickness were deposited onto single-crystal sapphire substrates. Fe or Cr ions were introduced into the films during deposition. A post-deposition thermal process was performed in oxidizing ambients at 800-1400 degrees C to induce epitaxial growth and to incorporate dopants. The epitaxial relationship of the grown him with the substrate was confirmed by both ion channeling and cross-sectional transmission electron microscopy. The growth kinetics were determined by time-resolved reflectivity measurements for different dopant concentrations. Ion channeling angular scans revealed that the Fe or Cr ions are incorporated onto octahedral sites (Al3+ sites) in the corundum structure as expected in equilibrium. External optical transmittance measurements exhibited absorption in the near ultraviolet range associated with the Fe3+ state. The substitution of Cr for Al3+ was also confirmed by the observation of R1 and R2 luminescence lines characteristic of ruby, The doping procedure has potential applications in the fabrication of thin film planar optical waveguides and thin film stress sensors. (C) 1995 American Institute of Physics. C1 UNIV CALIF SANTA BARBARA,DEPT MAT,SANTA BARBARA,CA 93106. UNIV WESTERN ONTARIO,DEPT PHYS,LONDON,ON N6A 3K7,CANADA. LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. RP YU, N (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. RI Clarke, David/D-2616-2009; Albe, Karsten/F-1139-2011 NR 32 TC 20 Z9 21 U1 1 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 1 PY 1995 VL 78 IS 9 BP 5412 EP 5421 DI 10.1063/1.359722 PG 10 WC Physics, Applied SC Physics GA TB545 UT WOS:A1995TB54500028 ER PT J AU COOK, BA HARRINGA, JL HAN, SH VINING, CB AF COOK, BA HARRINGA, JL HAN, SH VINING, CB TI SI80GE20 THERMOELECTRIC ALLOYS PREPARED WITH GAP ADDITIONS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID SILICON AB Controlled amounts of GaP and P were added to a Si0.8Ge0.2 matrix by a powder-metallurgical technique in order to evaluate the optimum composition for thermoelectric applications. Bulk determination of the gallium and phosphorus content in fully dense, hot pressed compacts was performed by inductively coupled plasma atomic emission spectroscopy. The transport properties of the compacts were characterized by Hall effect measurements at room temperature and by measurements of electrical resistivity, Seebeck coefficient, and thermal diffusivity to 1000 degrees C. Considerable variation in the electrical transport properties were found to accompany changes in the Ga/P ratio, in the total amount of dopant, and changes in other preparation conditions. Alloys with gallium phosphide additions exhibit carrier concentrations higher than those obtained in alloys doped only with phosphorus. Alloys with a nominal phosphorus content greater than 2.0 at. % were found to be overdoped and those containing less than 0.6 at. % phosphorus were found to be underdoped relative to the material's maximum figure of merit. Room temperature electron mobilities greater than 40 cm(2)/V s were commonly obtained in samples with a carrier concentration of 3X10(20) cm(-3) or greater. A 300-1000 degrees C integrated average figure of merit (Z=S-2/p Lambda) of 0.93x10(-3)degrees C-1 was achieved within an optimum composition range of 0.8-1.2 at. % P and 0.6-0.8 mol % GaP, which is 20% higher than current n-type Si-Ge alloys doped with 0.59 at. % P as used in the Voyager, Galileo, and Ulysses missions. (C) 1995 American Institute of Physics. RP COOK, BA (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 19 TC 30 Z9 30 U1 1 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 NOV 1 PY 1995 VL 78 IS 9 BP 5474 EP 5480 DI 10.1063/1.359663 PG 7 WC Physics, Applied SC Physics GA TB545 UT WOS:A1995TB54500037 ER PT J AU NELSON, AJ AF NELSON, AJ TI PHOTOEMISSION-STUDY OF CDS HETEROJUNCTION FORMATION WITH BINARY SELENIDE SEMICONDUCTORS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE; CUINSE2 AB Synchrotron radiation soft x-ray photoemission spectroscopy was used to investigate the development of the electronic structure at the CdS/Cu2-xSe and CdS/In6Se7 heterojunction interfaces. Cu2-xSe and In6Se7 layers were deposited on GaAs (100) by physical vapor deposition from Cu2Se and In2Se3 sources. CdS overlayers were then deposited in situ, at room temperature, in steps on these layers. Photoemission measurements were acquired after each growth to observe changes in the valence-band electronic structure and changes in the In4d and Cd4d core lines. The results were used to correlate the interfacial chemistry with the electronic structure and to directly determine the CdS/Cu2-xSe and CdS/In6Se7 heterojunction valence-band discontinuities and the consequent heterojunction band diagrams. These results are compared to the valence-band offset (Delta E(v)) for the CdS/CuInSe2 heterojunction interface. RP NELSON, AJ (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 24 TC 10 Z9 10 U1 2 U2 8 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD NOV 1 PY 1995 VL 78 IS 9 BP 5701 EP 5705 DI 10.1063/1.359629 PG 5 WC Physics, Applied SC Physics GA TB545 UT WOS:A1995TB54500076 ER PT J AU BASTACKY, J LEE, CYC GOERKE, J KOUSHAFAR, H YAGER, D KENAGA, L SPEED, TP CHEN, Y CLEMENTS, JA AF BASTACKY, J LEE, CYC GOERKE, J KOUSHAFAR, H YAGER, D KENAGA, L SPEED, TP CHEN, Y CLEMENTS, JA TI ALVEOLAR LINING LAYER IS THIN AND CONTINUOUS - LOW-TEMPERATURE SCANNING ELECTRON-MICROSCOPY OF RAT LUNG SO JOURNAL OF APPLIED PHYSIOLOGY LA English DT Article DE EXTRACELLULAR FLUID; SURFACTANT; SUBPHASE; ALVEOLAR HYPOPHASE; ALVEOLUS; FROZEN HYDRATED; PULMONARY EDEMA; CRYOMICROSCOPY ID VOLUME CHANGES; SURFACTANT; TISSUE; WATER AB The low-temperature electron microscope, which preserves aqueous structures as solid water at liquid nitrogen temperature, was used to image the alveolar lining layer, including surfactant and its aqueous subphase, of air-filled lungs frozen in anesthetized rats at 15-cmH(2)O transpulmonary pressure. Lining layer thickness was measured on cross fractures of walls of the outermost subpleural alveoli that could be solidified with metal mirror cryofixation at rates sufficient to limit ice crystal growth to 10 nm and prevent appreciable water movement. The thickness of the liquid layer averaged 0.14 mu m over relatively flat portions of the alveolar walls, 0.89 mu m at the alveolar wall junctions, and 0.09 mu m over the protruding features (9 rats, 20 walls, 16 junctions, and 146 areas), for an area-weighted average thickness of 0.2 mu m. The alveolar lining layer appears continuous, submerging epithelial cell microvilli and intercellular junctional ridges; varies from a few nanometers to several micrometers in thickness; and serves to smooth the alveolar air-liquid interface in lungs inflated to zone 1 or 2 conditions. C1 UNIV CALIF BERKELEY, DEPT STAT, BERKELEY, CA 94720 USA. UNIV CALIF SAN FRANCISCO, CARDIOVASC RES INST, SAN FRANCISCO, CA 94143 USA. UNIV CALIF SAN FRANCISCO, DEPT PHYSIOL, SAN FRANCISCO, CA 94143 USA. UNIV CALIF SAN FRANCISCO, DEPT PEDIAT, SAN FRANCISCO, CA 94143 USA. UNIV WISCONSIN, MADISON, WI 53706 USA. RP BASTACKY, J (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV LIFE SCI, BERKELEY, CA 94720 USA. RI Speed, Terence /B-8085-2009 OI Speed, Terence /0000-0002-5403-7998 FU NHLBI NIH HHS [HL-33009, HL-24075, HL-40521] NR 50 TC 171 Z9 174 U1 0 U2 9 PU AMER PHYSIOLOGICAL SOC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 8750-7587 J9 J APPL PHYSIOL JI J. Appl. Physiol. PD NOV PY 1995 VL 79 IS 5 BP 1615 EP 1628 PG 14 WC Physiology; Sport Sciences SC Physiology; Sport Sciences GA TD929 UT WOS:A1995TD92900031 PM 8594022 ER PT J AU PEAK, MJ ROBB, FT PEAK, JG AF PEAK, MJ ROBB, FT PEAK, JG TI EXTREME RESISTANCE TO THERMALLY-INDUCED DNA BACKBONE BREAKS IN THE HYPERTHERMOPHILIC ARCHAEON PYROCOCCUS-FURIOSUS SO JOURNAL OF BACTERIOLOGY LA English DT Note ID DEOXYRIBONUCLEIC-ACID; ESCHERICHIA-COLI; ARCHAEBACTERIA AB Pyrococcus furiosus is a hyperthermophilic archaeon that grows optimally at 100 degrees C. It is not conceivable that these organisms could survive with genomic DNA that was subject to thermal destruction, yet the mechanisms protecting the genomes of this and other hyperthermophiles against such destruction are obscure. We have determined the effect of elevated temperatures up to 110 degrees C on the molecular weight of DNA in intact P. furiosus cells, compared with the effect of elevated temperatures on DNA in the mesothermophilic bacterium Escherichia coli. At 100 degrees C, DNA in P. furiosus cells is about 20 times more resistant to thermal breakage than that in E. coli tells, and six times fewer breaks were found in P. furiosus DNA after exposure to 110 degrees C for 30 min than in E. coli DNA at 95 degrees C. Our hypothesis for this remarkable stability of DNA in a hyperthermophile is that this hyperthermophile possesses DNA-binding proteins that protect against hydrolytic damage, as well as other endogenous protective mechanisms and DNA repair enzyme systems. C1 UNIV MARYLAND,CTR MARINE BIOTECHNOL,BALTIMORE,MD 21202. RP PEAK, MJ (reprint author), ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. OI Robb, Frank/0000-0001-5833-6496 NR 18 TC 28 Z9 30 U1 0 U2 1 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 NOV PY 1995 VL 177 IS 21 BP 6316 EP 6318 PG 3 WC Microbiology SC Microbiology GA TC114 UT WOS:A1995TC11400042 PM 7592404 ER PT J AU MARSHALL, GW BALOOCH, M KINNEY, JH MARSHALL, SJ AF MARSHALL, GW BALOOCH, M KINNEY, JH MARSHALL, SJ TI ATOMIC-FORCE MICROSCOPY OF CONDITIONING AGENTS ON DENTIN SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH LA English DT Article ID INTERDIFFUSION ZONE AB Dentin conditioners provide a microporous surface for penetration by bonding agents. This study used an atomic force microscope (AFM) to examine the initial steps in the conditioning process of dentin using three demineralizing agents, 0.5 M EDTA, and dilute solutions of phosphoric (3 mM, 6 mM) and citric (5 mM) acids, in order to establish the relationships between demineralization and changes in surface morphology. Polished dentin disks had a 10-nm-thick gold pattern applied which served as a height reference. Samples (n = 3/agent) were examined at baseline and at 2-s intervals for up to 120 s for each agent. EDTA (0.5 M) was used as received; other conditioners were diluted to slow the rates of demineralization for detailed study. The surfaces of the peritubular and intertubular regions were altered differently. Initially subsidence rates were equal and linear, but after a 100-nm depth change the intertubular rates decreased. For phosphoric acid and citric acid, the movement of the intertubular surface was uniform and the surfaces remained smooth. However, the intertubular surfaces were rough for the EDTA treatment. The surface subsidence reached a plateau after a depth change of about 0.5 mu m, which resulted from a limit to the contraction of the demineralized and hydrated collagen scaffold. (C) 1995 John Wiley & Sons, Inc. C1 LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP MARSHALL, GW (reprint author), UNIV CALIF SAN FRANCISCO,DEPT RESTORAT DENT,707 PARNASSUS AVE,BOX 0758,SAN FRANCISCO,CA 94143, USA. FU NIDCR NIH HHS [P01DE09859] NR 19 TC 62 Z9 62 U1 0 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-9304 J9 J BIOMED MATER RES JI J. Biomed. Mater. Res. PD NOV PY 1995 VL 29 IS 11 BP 1381 EP 1387 DI 10.1002/jbm.820291109 PG 7 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA TB898 UT WOS:A1995TB89800008 PM 8582906 ER PT J AU JACOBY, WA BLAKE, DM NOBLE, RD KOVAL, CA AF JACOBY, WA BLAKE, DM NOBLE, RD KOVAL, CA TI KINETICS OF THE OXIDATION OF TRICHLOROETHYLENE IN AIR VIA HETEROGENEOUS PHOTOCATALYSIS SO JOURNAL OF CATALYSIS LA English DT Article ID TITANIUM-DIOXIDE AB Trichloroethylene in solution with air is oxidized rapidly in the presence of irradiated titanium dioxide. Dichloroacetyl chloride (DCAC), which is formed as an intermediate during the trichloroethylene reaction, also undergoes photocatalytic oxidation. This paper describes the kinetics of these reactions and how operating conditions influence the observed reaction rates. Annular photocatalytic reactors with thin films of titanium dioxide catalyst were used to make kinetic measurements. Observations of the reaction rate of trichloroethylene were made while varying parameters such as catalyst loading, feed flow rate, feed composition, and ultraviolet light energy. The observed reaction rates are higher by several orders of magnitude than those previously reported in the literature, and an expression for the prediction of rate as a function of reactant partial pressure is provided. The rate of reaction of the DCAC intermediate is also discussed. Air is shown to be an optimum oxidant, and an optimum humidity is established. The reaction is shown to proceed indefinitely under dry conditions, supporting the existence of a chlorine radical propagated surface reaction. (C) 1995 Academic Press, Inc. C1 UNIV COLORADO,BOULDER,CO 80309. RP JACOBY, WA (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 19 TC 147 Z9 148 U1 2 U2 14 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 NOV PY 1995 VL 157 IS 1 BP 87 EP 96 DI 10.1006/jcat.1995.1270 PG 10 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA TB175 UT WOS:A1995TB17500009 ER PT J AU WeinsteinLloyd, J Lee, JH AF WeinsteinLloyd, J Lee, JH TI Environmental laboratory exercise - Analysis of hydrogen peroxide by fluorescence spectroscopy SO JOURNAL OF CHEMICAL EDUCATION LA English DT Article ID ACID DEPOSITION; HYDROXYMETHYL; PRECIPITATION; CHEMISTRY; SULFATE; TREES; FOG C1 BROOKHAVEN NATL LAB,ENVIRONM CHEM DIV,UPTON,NY 11973. RP WeinsteinLloyd, J (reprint author), SUNY COLL OLD WESTBURY,CHEM PHYS PROGRAM,OLD WESTBURY,NY 11568, USA. NR 29 TC 8 Z9 8 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0021-9584 J9 J CHEM EDUC JI J. Chem. Educ. PD NOV PY 1995 VL 72 IS 11 BP 1053 EP 1055 PG 3 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA TM968 UT WOS:A1995TM96800039 ER PT J AU CHANG, TM PETERSON, KA DANG, LX AF CHANG, TM PETERSON, KA DANG, LX TI MOLECULAR-DYNAMICS SIMULATIONS OF LIQUID, INTERFACE, AND IONIC SOLVATION OF POLARIZABLE CARBON-TETRACHLORIDE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MONTE-CARLO CALCULATIONS; SURFACE-TENSION; NEUTRON-SCATTERING; WATER INTERFACE; ABINITIO; BENZENE; CCL4 AB In this study, we construct st nonadditive polarizable model potential to describe the intermolecular interactions between carbon tetrachloride, CCl4, based on classical molecular dynamics techniques. The potential parameters are refined to accurately describe the experimental thermodynamic and structural properties of liquid CCl4 at 298 K. We then carried out additional Liquid CCl4 simulations at temperatures in the range of 250-323 K to examine the temperature dependence of the thermodynamic properties. The computed liquid densities and the enthalpies of vaporization are in excellent agreement with experimental values. The structures of liquid CCl4 can be analyzed by examining the radial distribution functions and angular distribution functions. It is found that the liquid CCl4 forms an interlocking structure and that a local orientational correlation is observed between neighboring CCl4 molecules. We also investigate the CCl4 liquid/vapor interface using this potential model. The density profile shows that the interface is not sharp at a microscopic level and has a thickness of roughly 5 Angstrom at 273 K. The results of angular distribution function calculations suggest that CCl4 molecules do not have a preferred orientation at the interface. The calculated surface tension is 31 +/- 2 dyn/cm, in good agreement with the experimental value of 28 dyn/cm. This model potential is also used to examine the interactions between Cs+ and small (CC1(4))(n) (n = 1-6) clusters. A tetrahedral configuration is found for the minimum structure of the Cs+(CCl4)(4) cluster. It is noticed that the polarization energy is the dominant component of the total interaction of these ionic clusters, indicating the importance of including explicitly the polarization in the ionic interactions. In the study of Cs+ solvation in liquid CCl4, we observe a well-defined solvation shell around the Cs+ with a coordination number of six CCl4 molecules. It is also found that Cs+ induces a strong, local orientational order in Liquid CCl4. Accurate ab initio electronic structure calculations were also carried out on the CCl4 dimer and the Cs+(CCl4) cluster to compare to the results from the molecular dynamics simulations. (C) 1995 American Institute of Physics. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. WASHINGTON STATE UNIV, DEPT CHEM, PULLMAN, WA 99164 USA. NR 50 TC 69 Z9 69 U1 1 U2 11 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD NOV 1 PY 1995 VL 103 IS 17 BP 7502 EP 7513 DI 10.1063/1.470319 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TB633 UT WOS:A1995TB63300025 ER PT J AU FAY, PJ RAY, JR WOLF, RJ AF FAY, PJ RAY, JR WOLF, RJ TI DETAILED BALANCE METHODS FOR CHEMICAL-POTENTIAL DETERMINATION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SIMULATIONS; THERMODYNAMICS; ENSEMBLE; METALS AB In earlier work [J. Chem. Phys. 100, 2154 (1994)] we presented a new method of determining the chemical potential in Monte Carlo or molecular dynamics simulations which makes use of a detailed balance method (DBM). In the present paper we present results of a careful study of this method applied to liquid palladium down to and below the zero-pressure melting temperature. A new surface detailed balance method (SDBM) is introduced, which is much more efficient near and below the melting temperature where the original method becomes too inefficient to determine an accurate value of the chemical potential. We also present results where the new surface detailed balance method is used to determine the chemical potential of the solid phase at a number of different temperatures. (C) 1995 American Institute of Physics. C1 CLEMSON UNIV,DEPT PHYS & ASTRON,KINARD LAB PHYS,CLEMSON,SC 29634. WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER LAB,AIKEN,SC 29808. RP FAY, PJ (reprint author), UNIV S CAROLINA,OFF VICE PROVOST RES,COLUMBIA,SC 29208, USA. NR 18 TC 0 Z9 0 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 NOV 1 PY 1995 VL 103 IS 17 BP 7556 EP 7561 DI 10.1063/1.470272 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TB633 UT WOS:A1995TB63300030 ER PT J AU THOMAS, EV AF THOMAS, EV TI INCORPORATING AUXILIARY PREDICTOR VARIATION IN PRINCIPAL COMPONENT REGRESSION-MODELS SO JOURNAL OF CHEMOMETRICS LA English DT Article DE BATCH PREDICTION; CONTINUUM REGRESSION; MULTIVARIATE CALIBRATION; SEQUENTIAL PREDICTION; SIMULTANEOUS PREDICTION ID NEAR-INFRARED SPECTROSCOPY; MULTIVARIATE CALIBRATION; SELECTION; SAMPLES AB In analytical chemistry a single fitted calibration model is used repeatedly to predict the level of the analyte of interest for the specimens comprising the prediction set. Unlike the calibration (or training) set, which is often limited in size, the prediction set can be very large. In the case of multivariate calibration a number of methods such as PLS and PCR are commonly used to construct the calibration model. The set of instrumental measurements and the reference analyte level are available for each specimen in the calibration set. For specimens in the prediction set, only the instrumental measurements are available, since the problem is to predict the analyte level for these specimens. It is not widely recognized that predictions of the analyte levels for individual specimens can be improved by utilizing seemingly unrelated information from the instrumental measurements associated with the other members of the prediction set. In the case of PCR there exists a very straightforward procedure for doing this. A description of the various sources of prediction errors is provided to explain the ability of PCR to utilize this additional information. The use of PCR in this context is illustrated with both a synthetic and a real example. RP THOMAS, EV (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 11 TC 6 Z9 6 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0886-9383 J9 J CHEMOMETR JI J. Chemometr. PD NOV-DEC PY 1995 VL 9 IS 6 BP 471 EP 481 DI 10.1002/cem.1180090605 PG 11 WC Automation & Control Systems; Chemistry, Analytical; Computer Science, Artificial Intelligence; Instruments & Instrumentation; Mathematics, Interdisciplinary Applications; Statistics & Probability SC Automation & Control Systems; Chemistry; Computer Science; Instruments & Instrumentation; Mathematics GA TG184 UT WOS:A1995TG18400004 ER PT J AU SKLAREW, DS OZANICH, RM LEE, RN AMONETTE, JE WRIGHT, BW RILEY, RG AF SKLAREW, DS OZANICH, RM LEE, RN AMONETTE, JE WRIGHT, BW RILEY, RG TI SUPERCRITICAL-FLUID VERSUS SOXHLET EXTRACTION WITH FTIR OR GC DETECTION OF TRIBUTYL-PHOSPHATE AND LARD OIL FROM SEDIMENTS - RECOVERIES SO JOURNAL OF CHROMATOGRAPHIC SCIENCE LA English DT Article ID SOIL; SONICATION; PESTICIDES; SAMPLES RP SKLAREW, DS (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 14 TC 5 Z9 5 U1 0 U2 0 PU PRESTON PUBLICATIONS INC PI NILES PA 7800 MERRIMAC AVE PO BOX 48312, NILES, IL 60648 SN 0021-9665 J9 J CHROMATOGR SCI JI J. Chromatogr. Sci. PD NOV PY 1995 VL 33 IS 11 BP 622 EP 630 PG 9 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA TC146 UT WOS:A1995TC14600004 ER PT J AU JUDSON, RS TAN, YT MORI, E MELIUS, C JAEGER, EP TREASURYWALA, AM MATHIOWETZ, A AF JUDSON, RS TAN, YT MORI, E MELIUS, C JAEGER, EP TREASURYWALA, AM MATHIOWETZ, A TI DOCKING FLEXIBLE MOLECULES - A CASE-STUDY OF 3 PROTEINS SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article ID TRANSITION-STATE ANALOGS; CARBOXYPEPTIDASE-A; GENETIC ALGORITHM; BROWNIAN DYNAMICS; AUTOMATED DOCKING; ESCHERICHIA-COLI; HYDROXAMIC ACIDS; SLOW-BINDING; DRUG DESIGN; THERMOLYSIN AB A genetic algorithm (GA) conformation search method is used to dock a series of flexible molecules into one of three proteins. The proteins examined are thermolysin (tmn), carboxypeptidase A (cpa), and dihydrofolate reductase (dfr). In the latter two proteins, the crystal ligand was redocked. For thermolysin, we docked eight ligands into a protein conformation derived from a single crystal structure. The bound conformations of the other ligands in tmn are known. In the cpa and dfr cases, and in seven of thee eight tmn ligands, the GA docking method found conformations within 1.6 Angstrom root mean square (rms) of the relaxed crystal conformation. (C) 1995 by John Wiley & Sons, Inc. C1 STERLING WINTHROP INC, COLLEGEVILLE, PA 19426 USA. RP JUDSON, RS (reprint author), SANDIA NATL LABS, CTR COMPUTAT ENGN MS 9214, LIVERMORE, CA 94551 USA. NR 54 TC 38 Z9 38 U1 0 U2 0 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0192-8651 EI 1096-987X J9 J COMPUT CHEM JI J. Comput. Chem. PD NOV PY 1995 VL 16 IS 11 BP 1405 EP 1419 DI 10.1002/jcc.540161109 PG 15 WC Chemistry, Multidisciplinary SC Chemistry GA TA403 UT WOS:A1995TA40300008 ER PT J AU STRAIN, J AF STRAIN, J TI SPECTRAL METHODS FOR NONLINEAR PARABOLIC-SYSTEMS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID NONSYMMETRIC LINEAR-SYSTEMS; PHASE-TRANSITIONS; MODELS; EQUATIONS AB Many physical problems are naturally formulated as nonlinear parabolic systems of partial differential equations in periodic geometry. In this paper, a simple, efficient, spectrally-accurate numerical method for these problems is described and implemented. The method combines stiff extrapolation with fast solvers for elliptic systems. Theory and numerical results show that the method solves even difficult problems including phase field models and mean curvature flows. (C) 1995 Academic Press, Inc. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP STRAIN, J (reprint author), UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720, USA. NR 14 TC 6 Z9 6 U1 2 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1995 VL 122 IS 1 BP 1 EP 12 DI 10.1006/jcph.1995.1191 PG 12 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA TB166 UT WOS:A1995TB16600001 ER PT J AU RESTREPO, JM LEAF, GK AF RESTREPO, JM LEAF, GK TI WAVELET-GALERKIN DISCRETIZATION OF HYPERBOLIC-EQUATIONS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID BOUNDARY-VALUE-PROBLEMS; NUMERICAL-SOLUTION AB The relative merits of the wavelet-Galerkin solution of hyperbolic partial differential equations, typical of geophysical problems, are quantitatively and qualitatively compared to traditional finite difference and Fourier-pseudo-spectral methods. The wavelet-Galerkin solution presented here is found to be a viable alternative to the two conventional techniques. (C) 1995 Academic Press, Inc. RP RESTREPO, JM (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,ARGONNE,IL 60439, USA. OI Restrepo, Juan/0000-0003-2609-2882 NR 16 TC 30 Z9 34 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 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1995 VL 122 IS 1 BP 118 EP 128 DI 10.1006/jcph.1995.1201 PG 11 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA TB166 UT WOS:A1995TB16600011 ER PT J AU RESTREPO, JM BONA, JL AF RESTREPO, JM BONA, JL TI DISCRETIZATION OF A MODEL FOR THE FORMATION OF LONGSHORE SAND RIDGES SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article AB This paper presents and evaluates the numerical solution of a coupled system of equations that arises in a model for the formation and evolution of three-dimensional longshore sand ridges. The model is based on the interaction between surficial or internal weakly nonlinear shallow-water waves, having weak spanwise spatial dependence, and the deformable bottom topography. The presentation of the details concerning the discretization of the model is primarily motivated by: (1) the model involves equations for which little is known regarding its solutions; (2) we believe th at the methodology used in simplifying the solution to the coupled sand ridge model may be of interest to other researchers in the geophysical community; and (3) the predictor-corrector scheme presented here, which combines finite difference techniques and fixed-point methods, is simple, fast, and general enough to be used in the discretization of other partial differential equations with local nonlinearities whose solutions are smooth and bounded, (C) 1995 Academic Press, Inc. C1 PENN STATE UNIV,DEPT MATH,UNIVERSITY PK,PA 16802. RP RESTREPO, JM (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. OI Restrepo, Juan/0000-0003-2609-2882 NR 13 TC 2 Z9 2 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1995 VL 122 IS 1 BP 129 EP 142 DI 10.1006/jcph.1995.1202 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA TB166 UT WOS:A1995TB16600012 ER PT J AU BROWN, DL MINION, ML AF BROWN, DL MINION, ML TI PERFORMANCE OF UNDER-RESOLVED 2-DIMENSIONAL INCOMPRESSIBLE-FLOW SIMULATIONS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID VORTEX SHEET; EQUATIONS AB A careful study of the behavior of a Godunov-projection method for the incompressible Navier-Stokes equations as a function of the resolution of the computational mesh is presented, By considering a representative example problem, it is demonstrated that a Godunov-projection method performs as well as an accurate centered finite difference method in cases where the smallest flow scales are well resolved. In underresolved cases, however, where centered methods compute solutions badly polluted with mesh-scale oscillations, the Godunov-projection method sometimes computes smooth, apparently physical solutions. Closer examination indicates that these underresolved Godunov solutions, although convergent when the grid is refined, contain spurious nonphysical vortices that are artifacts of the underresolution, These artifacts are not unique to Godunov methods, however, and are observed with other difference approximations as well. The implication of these results on the applicability of difference approximations to engineering flow problems in the underresolved case is discussed. (C) 1995 Academic Press, Inc. C1 NYU,COURANT INST MATH SCI,NEW YORK,NY 10012. RP BROWN, DL (reprint author), LOS ALAMOS NATL LAB,DIV COMP INFORMAT & COMMUN,POB 1663,LOS ALAMOS,NM, USA. RI Minion, Michael/B-2235-2008 NR 19 TC 48 Z9 50 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD NOV PY 1995 VL 122 IS 1 BP 165 EP 183 DI 10.1006/jcph.1995.1205 PG 19 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA TB166 UT WOS:A1995TB16600015 ER PT J AU ALBERT, MS SCHEPKIN, VD BUDINGER, TF AF ALBERT, MS SCHEPKIN, VD BUDINGER, TF TI MEASUREMENT OF XE-129 T1 IN BLOOD TO EXPLORE THE FEASIBILITY OF HYPERPOLARIZED XE-129 MRI SO JOURNAL OF COMPUTER ASSISTED TOMOGRAPHY LA English DT Article DE XENON; NMR RELAXATION; MRI ID SPIN-EXCHANGE; XENON; GAS; RELAXATION AB Objective: The major obstacle to the use of 129-xenon (I = 1/2) as a new source of contrast in magnetic resonance is its low sensitivity. The hyperpolarized Xe-129-MRI technique using laser optical pumping of rubidium promises to resolve this problem. The potential of xenon-based MRI for the body tissues other than the lung air spaces depends on the Xe-129 polarization lifetime (T1) in the blood at a magnetic field of commonly available clinical MRI systems. Materials and Methods: Xenon with natural abundance of Xe-129 (26%) was dissolved in human blood and studied at 36 degrees C in a 2.35 T 40 cm bore MRI spectrometer (27.6 MHz). Zeeman relaxation (T1) of six blood samples was measured by the progressive saturation method for periods of 4-8 h each. Results: NMR spectra revealed two peaks at 216.0 ppm (A) and 194.0 ppm (B) relative to the xenon gas above the blood volume. Assignment and Xe-129 T1 values were 4.5 +/- 1 s for red blood cells (A), 9.6 +/- 2 s for plasma (B) and 11.9 +/- 1.6 s for xenon gas at atmospheric oxygen pressure. Xenon dissolved in distilled water appears at 189.8 ppm and has T1 = 26.3 +/- 1.4 s. Conclusion: These relaxation times, though shorter than expected, are comparable to the transport time of blood, and are long enough to encourage use of hyperpolarized xenon for MRI studies in tissues, in addition to lung. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. BRIGHAM & WOMENS HOSP,DEPT RADIOL,BOSTON,MA 02115. HARVARD UNIV,SCH MED,BOSTON,MA. RI Schepkin, Victor/A-1245-2007 FU NHLBI NIH HHS [HL-25840] NR 19 TC 52 Z9 52 U1 2 U2 21 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0363-8715 J9 J COMPUT ASSIST TOMO JI J. Comput. Assist. Tomogr. PD NOV-DEC PY 1995 VL 19 IS 6 BP 975 EP 978 DI 10.1097/00004728-199511000-00025 PG 4 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TG471 UT WOS:A1995TG47100023 PM 8537536 ER PT J AU SEAMAN, JC BERTSCH, PM MILLER, WP AF SEAMAN, JC BERTSCH, PM MILLER, WP TI IONIC TRACER MOVEMENT THROUGH HIGHLY WEATHERED SEDIMENTS SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article ID SOLUTE TRANSPORT; SCALE DISPERSION; ADSORPTION; SOILS; ALUMINUM; AQUIFER; CALCIUM; CHARGE; CHLORIDE; NITRATE AB A highly-weathered, sandy aquifer material from the Upper Coastal Plain region of the southeastern U.S.A. (Aiken, South Carolina) was used to determine the impact of ionic strength and solution composition on the determination of physical transport parameters using ionic tracers. The mineralogy of the clay fraction consisted primarily of kaolinite, goethite and mica. Repacked saturated columns (bulk density similar to 1.5 g cm(-3)) were leached at a constant rate (similar to 0.25 cm min(-1)) with a given tracer solution. For comparison, tritium (similar to 200 pCi mL(-1)) was included in leachate of selected columns and several of the experiments were replicated in columns of acid-washed sand. Pore volume estimates based on tritium breakthrough were consistent with those calculated from the bulk density of the repacked matrix. In contrast, solute breakthrough for the sandy geologic material was dependent on concentration, as well as cation and anion type. At low ionic strengths (0.0005-0.010 M) that are analogous to conditions that may be encountered in field-scale transport experiments, neither the cation nor the anion acted conservatively, yielding systematically high estimates of column porosity or low estimates of flow velocity. At the higher ionic strengths (similar to 0.10 M), solute breakthrough was essentially conservative regardless of ionic composition. The impact of cation valence and concentration on Br- breakthrough was determined using MgBr2 and KBr solutions of varying concentrations (0.001-0.1 N). Bromide breakthrough was substantially delayed for concentrations below 0.10 M and was delayed to a greater extent in the presence of a divalent cation (Mg2+) than in the presence of a monovalent cation (K+). Failure to recognize these interactions in the field could lead to a false interpretation of Br displacement in terms of physical interactions, i.e. flow velocity, dispersivity, etc. C1 UNIV GEORGIA,DEPT ENVIRONM SOIL SCI,ATHENS,GA 30602. RP SEAMAN, JC (reprint author), UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DIV BIOGEOCHEM,DRAWER E,AIKEN,SC 29802, USA. NR 36 TC 31 Z9 31 U1 1 U2 6 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 NOV PY 1995 VL 20 IS 1-2 BP 127 EP 143 DI 10.1016/0169-7722(95)00043-U PG 17 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA TH275 UT WOS:A1995TH27500007 ER PT J AU WAGELE, JW VOELZ, NJ MCARTHUR, JV AF WAGELE, JW VOELZ, NJ MCARTHUR, JV TI OLDER THAN THE ATLANTIC-OCEAN - DISCOVERY OF A FRESH-WATER MICROCERBERUS (ISOPODA) IN NORTH-AMERICA AND ERECTION OF COXICERBERUS, NEW GENUS SO JOURNAL OF CRUSTACEAN BIOLOGY LA English DT Article ID CRUSTACEA AB The first fresh-water microcerberid isopod (Isopoda: Asellota) from the United States is reported from wells in South Carolina (Microcerberus carolinensis, new species). The closest relatives occur in southeastern Europe and belong to a distinct fresh-water clade with triramous pleopod 4 (genus Microcerberus sensu stricto), a group which must be older than the Atlantic Ocean. Reconstructed evolution of morphology indicates that the fresh-water microcerberids are the more primitive ones. For the more derived coastal mesopsammal species, the new genus Coxicerberus is proposed. C1 UNIV BIELEFELD,FAK BIOL,D-33615 BIELEFELD,GERMANY. ST CLOUD STATE UNIV,DEPT SCI BIOL,ST CLOUD,MN 56301. RP WAGELE, JW (reprint author), SAVANNAH RIVER ECOL LAB,DEPT REPRINT,DRAWER E,AIKEN,SC 29802, USA. NR 30 TC 11 Z9 12 U1 1 U2 1 PU CRUSTACEAN SOC PI SAN ANTONIO PA 840 EAST MULBERRY, SAN ANTONIO, TX 78212 SN 0278-0372 J9 J CRUSTACEAN BIOL JI J. Crustac. Biol. PD NOV PY 1995 VL 15 IS 4 BP 733 EP 745 DI 10.2307/1548822 PG 13 WC Marine & Freshwater Biology SC Marine & Freshwater Biology GA TD670 UT WOS:A1995TD67000013 ER PT J AU FELDBERG, SW GOLDSTEIN, CI AF FELDBERG, SW GOLDSTEIN, CI TI EXAMINATION OF THE BEHAVIOR OF THE FULLY IMPLICIT FINITE-DIFFERENCE ALGORITHM WITH THE RICHTMYER MODIFICATION - BEHAVIOR WITH AN EXPONENTIALLY EXPANDING TIME GRID SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article DE EXPONENTIAL TIME GRID; DIFFUSION KINETICS; FULLY IMPLICIT FINITE-DIFFERENCE ALGORITHM; RICHTMYER MODIFICATION ID SIMULATION; DIFFUSION AB This paper describes the development and application of the fully implicit finite-difference algorithm with the Richtmyer modification (the FIRM algorithm) and an exponential time grid to simulations of stiff problems involving homogeneous kinetics and simulations of stiff problems involving semi-infinite linear diffusion coupled with heterogeneous and homogeneous kinetics. The accuracy and stability of the FIRM algorithm with various levels and the dependence upon the starting protocol are discussed in detail. RP FELDBERG, SW (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 19 TC 45 Z9 45 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD NOV PY 1995 VL 397 IS 1-2 BP 1 EP 10 DI 10.1016/0022-0728(95)04161-1 PG 10 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA TH980 UT WOS:A1995TH98000001 ER PT J AU BAUCOM, KC KILLEEN, KP MOFFAT, HK AF BAUCOM, KC KILLEEN, KP MOFFAT, HK TI MONITORING OF MOCVD REACTANTS BY UV ABSORPTION SO JOURNAL OF ELECTRONIC MATERIALS LA English DT Article; Proceedings Paper CT 7th Biennial Workshop on Organometallic Vapor Phase Epitaxy CY APR 02-06, 1995 CL FT MYERS, FL SP Air Prod & Chem Inc, Aixtron Inc, Akzo Nobel Chem Inc, EMCORE Corp, Epitaxial Prod Int ltd, MCP Wafer Technol Ltd, MKS Instruments, Morton Int, NIMTEC Inc, Japan Energy Corp, Rockwell Int, Solkatron Chem, Thomas Swann & Co Ltd, Sci Equipment Div DE BUBBLER EFFICIENCY; METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) REACTANTS; UV ABSORPTION ID PRESSURE; GAAS AB In this paper, we describe how UV absorption measurements can be used to measure the flow rates of metalorganic chemical vapor deposition (MOCVD) reactants. This method utilizes the calculation of UV extinction coefficients by measuring the total pressure and absorbance in the neat reactant system. The development of this quantitative reactant flow rate monitor allows for the direct measurement of the efficiency of a reactant bubbler. We demonstrate bubbler efficiency results for TMGa, and then explain some discrepancies found in the TMA1 system due to the monomer to dimer equilibrium. Also, the UV absorption spectra of metalorganic and hydride MOCVD reactants over the wavelength range 185 to 400 nm are reported. RP BAUCOM, KC (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 14 TC 10 Z9 10 U1 2 U2 7 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 NOV PY 1995 VL 24 IS 11 BP 1703 EP 1706 DI 10.1007/BF02676836 PG 4 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA TE167 UT WOS:A1995TE16700034 ER PT J AU GONZALES, GJ SALADEN, MT HAKONSON, TE AF GONZALES, GJ SALADEN, MT HAKONSON, TE TI EFFECTS OF POCKET GOPHER BURROWING ON CESIUM-133 DISTRIBUTION ON ENGINEERED TEST PLOTS SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article AB Very low levels of radionuclides exist on soil surfaces from atmospheric fallout following weapons testing or from stack discharges, and from exposure of some of the older waste storage and disposal sites worldwide. Biological factors including vegetation and animal burrowing can influence the fate of these surface contaminants. Animal burrowing introduces variability in radionuclide migration that confounds estimation of nuclide migration pathways, risk assessment, and assessment of waste burial performance. A field study on the surface and subsurface erosional transport of surface-applied Cs-133 as affected by pocket gopher (Thomomys bottae) burrowing was conducted on simulated waste landfill caps at the Los Alamos National Laboratory in north central New Mexico. Surface loss of Cs, adhered to five soil particle size ranges, was measured several times over an 18-mo period while simulated rainfalls were in progress. Gophers reduced Cs surface loss by significant amounts, 43%. Cesium surface loss on plots with only gophers was 0.8 kg totalled for the study period, This compared with 1.4 kg for control plots, 0.5 kg for vegetated plots, and 0.2 kg for plots with both gophers and vegetation. The change in Cs surface loss over time was significant (P < 0.01), Relatively little subsurface Cs was measured in plots containing only gophers (0.7 g kg(-1)). Vegetation-bearing plots had significantly more total subsurface Cs (mu = 1.7 g kg(-1)) than plots without vegetation (mu = 0.8 g kg(-1)). An average of 97% of the subsurface Cs in plots with vegetation was located in the upper 15 cm of soil (SDR1 + SDR2) compared with 67% for plots without vegetation, Vegetation moderated the influence of gopher activity on the transport of Cs to soil subsurfaces, and stabilized subsurface Cs by concentrating it in the rhizosphere. Gopher activity may have caused Cs transport to depths below that sampled, 30 cm. The results provide distribution coefficients for models of contaminant migration where animal burrowing occurs. C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,ENVIRONM SCI GRP,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV ENVIRONM SAFETY & HLTH,LOS ALAMOS,NM 87545. RP GONZALES, GJ (reprint author), LOS ALAMOS NATL LAB,DIV TECHNOL & SAFETY ASSESSMENT,LOS ALAMOS,NM 87545, USA. NR 35 TC 7 Z9 7 U1 0 U2 1 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 NOV-DEC PY 1995 VL 24 IS 6 BP 1056 EP 1062 PG 7 WC Environmental Sciences SC Environmental Sciences & Ecology GA TF758 UT WOS:A1995TF75800002 ER PT J AU JONES, TL SERNE, RJ AF JONES, TL SERNE, RJ TI CONTAMINANT RELEASE FROM SOLIDIFIED RADIOACTIVE-WASTES BURIED IN UNSATURATED SEDIMENTS - LYSIMETER STUDY SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Article AB A lysimeter facility has been used since 1984 to monitor the leaching of buried waste forms under natural, arid conditions. The facility includes 10 bare-soil lysimeters (183 cm diam, by 305 cm deep) containing buried waste forms solidified with Portland III cement, masonry cement, bitumen, and vinyl-ester styrene. From 1984 through 1992, an average of 45 cm of water (27% of area precipitation) have leached through the lysimeters. To date, tritium, Co-60, and Cs-137 have been identified in the lysimeter leachate samples. From 1984 through 1992, >4000 mu Ci of tritium, representing 76 and 71% of inventory (not decay corrected), have been leached from the two waste forms containing tritium. Cobalt-60 (0.1% of original Co inventories) has been found in the leachate from each of all six of the waste forms that originally contained >1 mCi of inventory, Mobile Co is believed to be chelated with organic compounds, such as EDTA, present in the waste. Trace amounts of Cs-137 have occasionally been identified in leachate from two waste forms since 1991. Qualitatively, the held leaching results confirm laboratory studies, suggesting that tritium is readily leached from cement, and that Co-60 is generally leached more from cement than from vinyl-ester styrene. These data suggest that empirical source-term models should predict leaching based on the amount of water flowing past the waste form, not based on time. C1 PACIFIC NW LAB, DEPT GEOSCI, RICHLAND, WA 99352 USA. RP JONES, TL (reprint author), NEW MEXICO STATE UNIV, DEPT AGRON & HORT 3Q, LAS CRUCES, NM 88003 USA. NR 43 TC 10 Z9 10 U1 0 U2 1 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 NOV-DEC PY 1995 VL 24 IS 6 BP 1063 EP 1073 PG 11 WC Environmental Sciences SC Environmental Sciences & Ecology GA TF758 UT WOS:A1995TF75800003 ER PT J AU HARDY, E KREY, P AF HARDY, E KREY, P TI SPATIAL-ANALYSIS OF PLUTONIUM-239+240 AND AM-241 IN SOILS AROUND ROCKY-FLATS, COLORADO - COMMENT SO JOURNAL OF ENVIRONMENTAL QUALITY LA English DT Letter C1 US DOE,ENVIRONM MEASUREMENTS LAB,NEW YORK,NY 10014. NR 5 TC 4 Z9 4 U1 0 U2 0 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 NOV-DEC PY 1995 VL 24 IS 6 BP 1229 EP 1229 PG 1 WC Environmental Sciences SC Environmental Sciences & Ecology GA TF758 UT WOS:A1995TF75800024 ER PT J AU HESSE, M WINSKE, D KUZNETSOVA, MM AF HESSE, M WINSKE, D KUZNETSOVA, MM TI HYBRID MODELING OF COLLISIONLESS RECONNECTION IN 2-DIMENSIONAL CURRENT SHEETS - SIMULATIONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETIC RECONNECTION; TEARING MODE; NEUTRAL SHEET; INSTABILITY; PLASMAS; STABILITY; LINE AB The stability of thin current sheets, such as commonly occur in space plasmas, is investigated in the presence of a magnetic normal component. The investigation is based on hybrid simulations using a suitably adapted electron pressure model. In order to properly represent the effects of the electron cyclotron motion in the magnetic normal component, we include the cyclotron part of the electron pressure evolution in an implicit manner. The results of a number of these simulations are presented with emphasis on a comparison with the linear analytical theory (Kuznetsova et al., this issue), and on the nonlinear evolution of the tearing instability. We find, in agreement with linear theory, a transition to stability for electron mass below a certain threshold, which depends on the initial configuration. The results suggest that the onset of fast substorm evolution in the magnetotail may be a two-step process, where another presently not included mechanism leads to the destabilization of the tearing instability followed by the nonlinear growth of a large scale instability. C1 LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545. RP HESSE, M (reprint author), NASA,GODDARD SPACE FLIGHT CTR,ELECTRODYNAM BRANCH,GREENBELT,MD 20771, USA. RI Hesse, Michael/D-2031-2012; Kuznetsova, Maria/F-6840-2012 NR 47 TC 36 Z9 36 U1 0 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 NOV 1 PY 1995 VL 100 IS A11 BP 21815 EP 21825 DI 10.1029/95JA01559 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TD904 UT WOS:A1995TD90400043 ER PT J AU KUZNETSOVA, MM HESSE, M WINSKE, D AF KUZNETSOVA, MM HESSE, M WINSKE, D TI HYBRID MODELING OF THE TEARING INSTABILITY IN COLLISIONLESS 2-DIMENSIONAL CURRENT SHEETS - LINEAR-THEORY SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID NEUTRAL SHEET; MAGNETIC RECONNECTION; MAGNETOTAIL PLASMAS; PARTICLE ORBITS; SIMULATIONS; EQUILIBRIA; STABILITY AB The linear stability of thin magnetic field reversals is analyzed using a hybrid approach. The ion resonant response to electromagnetic perturbations is calculated from the kinetic Vlasov equation, whereas the electron response is derived from fluid equations using a suitably adapted electron pressure model. Effects of off-diagonal components of the perturbed pressure tensor on the compressional stabilization are taken into account. The results are presented with emphasis on a comparison with the linear fully kinetic theory and hybrid simulations of the same model (Hesse et al., this issue). We find the stability of perturbations with gradient scales greater than the maximum electron Larmor radius. The transition to instability with the increase of the electron mass is illustrated. C1 LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,LOS ALAMOS,NM 87545. RP KUZNETSOVA, MM (reprint author), NASA,GODDARD SPACE FLIGHT CTR,ELECTRODYNAM BRANCH,GREENBELT,MD 20771, USA. RI Hesse, Michael/D-2031-2012; Kuznetsova, Maria/F-6840-2012 NR 40 TC 9 Z9 9 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 NOV 1 PY 1995 VL 100 IS A11 BP 21827 EP 21833 DI 10.1029/95JA01560 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TD904 UT WOS:A1995TD90400044 ER PT J AU GARY, SP THOMSEN, MF YIN, L WINSKE, D AF GARY, SP THOMSEN, MF YIN, L WINSKE, D TI ELECTROMAGNETIC PROTON CYCLOTRON INSTABILITY - INTERACTIONS WITH MAGNETOSPHERIC PROTONS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID WAVE-PARTICLE INTERACTIONS; 1-2 MAGNETIC PULSATIONS; LOWER HYBRID WAVES; ION-CYCLOTRON; EQUATORIAL MAGNETOSPHERE; AURORAL PRECIPITATION; EARTHS MAGNETOSPHERE; SEMIKINETIC MODEL; 2ND-ORDER THEORY; PLASMA ANALYZER AB The temperature anisotropy of the hot (keV) protons of the outer magnetosphere can excite the electromagnetic proton cyclotron instability. Wave-particle scattering by this instability not only maintains the hot proton anisotropy at or below an upper bound but also imparts energy to the cool (eV) proton component. This instability and its consequences are examined through the use of linear and second-order Vlasov theory and one-dimensional hybrid simulations in a homogeneous plasma model which represents these two protonic constituents. A different form for the upper bound on the hot proton anisotropy is derived from linear theory and the simulations; comparison against plasma observations from Los Alamos magnetospheric plasma analyzers in geosynchronous orbit shows very good agreement. Second-order theory and simulations are used to obtain a different scaling for the late-time apparent temperature of the cool proton component T-c which indicates that it is inversely correlated with the cool proton density n(c). Observations in both the plasmasphere and the outer magnetosphere sometimes show a similar inverse correlation, suggesting that the electromagnetic proton cyclotron instability is an: important contributor to cool proton heating in these regions. C1 UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP GARY, SP (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 71 TC 66 Z9 66 U1 0 U2 3 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 NOV 1 PY 1995 VL 100 IS A11 BP 21961 EP 21972 DI 10.1029/95JA01403 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TD904 UT WOS:A1995TD90400056 ER PT J AU PRICHARD, D BOROVSKY, JE PRICE, CP AF PRICHARD, D BOROVSKY, JE PRICE, CP TI SUBSTORM RECURRENCE DURING STEADY AND VARIABLE SOLAR-WIND DRIVING - EVIDENCE FOR A NORMAL-MODE IN THE UNLOADING DYNAMICS OF THE MAGNETOSPHERE - COMMENT SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Note ID GEOMAGNETIC-ACTIVITY; CORRELATION DIMENSION; SPURIOUS DIMENSION; PLASMA SHEET; TIME-SERIES; PREDICTION; NOISE C1 UNIV ALASKA,DEPT PHYS,FAIRBANKS,AK 99775. LOS ALAMOS NATL LAB,DIV THEORET T13,COMPLEX SYST GRP,LOS ALAMOS,NM. LOS ALAMOS NATL LAB,SPACE & ATMOSPHER SCI GRP NIS1,LOS ALAMOS,NM. RP PRICHARD, D (reprint author), LOS ALAMOS NATL LAB,COMP RES & APPLICAT GRP CIC3,MS-M986,LOS ALAMOS,NM 87545, USA. NR 49 TC 3 Z9 3 U1 1 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 NOV 1 PY 1995 VL 100 IS A11 BP 21995 EP 22001 DI 10.1029/95JA01473 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TD904 UT WOS:A1995TD90400060 ER PT J AU NIEVES, LA CHEN, SY AF NIEVES, LA CHEN, SY TI RISK AND IMPACT TRADEOFFS IN RADIOACTIVE SCRAP METAL MANAGEMENT SO JOURNAL OF HAZARDOUS MATERIALS LA English DT Article DE ENVIRONMENTAL IMPACTS; HEALTH RISKS; RADIOACTIVITY; RECYCLING; SCRAP METAL AB Two management alternatives for radioactive scrap metal were evaluated: (1) recycling and reuse, and (2) disposal and replacement. The human health risks, environmental impacts, and sociopolitical issues potentially associated with these alternatives were assessed in an international context. For each alternative, the health risks from workplace and transportation accidents are greater in magnitude than the risks from potential exposure to radioactive materials or chemicals. The nonradiological risks are at least twice as high for disposal and replacement as they are for recycling, with the result that recycling has lower health risks overall. Environmental impacts from disposal and replacement of scrap metals are likely to be orders of magnitude higher than those for recycling. This is true of effects on land, water, and air quality, as well as for mineral and energy resources. In addition to risks and costs, issues affecting the choice between radioactive scrap metal management alternatives include low-level waste disposal site availability, public acceptability of recycling, potential impacts on metal markets, impacts of radioactivity on sensitive industrial uses of metal, and international equity issues. RP NIEVES, LA (reprint author), ARGONNE NATL LAB,DIS 900,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 0 Z9 0 U1 0 U2 2 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 NOV PY 1995 VL 44 IS 1 BP 37 EP 51 DI 10.1016/0304-3894(95)00048-Y PG 15 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA TE201 UT WOS:A1995TE20100003 ER PT J AU Sadasivan, P Unal, C Nelson, R AF Sadasivan, P Unal, C Nelson, R TI Nonlinear aspects of high heat flux nucleate boiling heat transfer SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article DE boiling; conjugate heat transfer; modeling and scaling ID POOL; SITES AB This paper deals with potential nonlinear effects in nucleate boiling systems as a result of the behavior of individual nucleation sites on the heater surface. This requires detailed microscopic modeling of the surface. A computational model has been formulated for this purpose. The model addresses the three-dimensional transient conduction heat transfer process within the problem domain comprised of the macrolayer and hearer. Hydrodynamic effects ave represented through boundary conditions. Individual nucleation sites are activated or deactivated depending on the thermal conditions that prevail at the site. The model has been used to examine the behavior of sites on a realistic heater surface. The results indicate that significant spatial and temporal temperature variations can occur on the surface, and that thermal interactions among sites can result in some sites operating intermittently. Surface-averaged temperatures show nonlinear period-doubling behavior. A chaotic case was found. Qualitative comparisons are made to both local instantaneous temperature measurements and recent experiments that showed chaotic behavior. We believe that such nonlinear behavior is one of the reasons that mechanistic predictive capabilities for the boiling process have remained elusive. RP Sadasivan, P (reprint author), TECHNOL & SAFETY ASSESSMENT DIV,LOS ALAMOS NATL LAB,NUCL SYST & DESIGN ANAL GRP,LOS ALAMOS,NM 87545, USA. NR 31 TC 27 Z9 31 U1 0 U2 4 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD NOV PY 1995 VL 117 IS 4 BP 981 EP 989 DI 10.1115/1.2836320 PG 9 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA TT893 UT WOS:A1995TT89300025 ER PT J AU Sun, JG Chen, MM AF Sun, JG Chen, MM TI Measurement of surface heat transfer due to particle impact SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article DE conduction; forced convection; measurement techniques ID BED; GAS AB Heat transfer coefficients for a surface continuously impacted by a stream of falling particles in air and in helium were measured as functions of particle flux and particle velocity. The purpose was to provide well-controlled data to clarify the mechanisms of heat transfer in particle suspension flow's. The particles were spherical glass beads with mean diameters of 0.5, 1.13, and 2.6 mm. The distribution of the particle impact flux on the surface was determined by deconvolution from the measurement of the total solid masses collected at both sides of a movable splitter plate. The particle velocity was calculated from a simple, well-established model. The experimental results showed that in air; the heat transfer coefficient increases approximately lineal early with particle impact flux. At high impact fluxes, the heat transfer coefficient decreases with particle impact velocity, and at low impact fluxes, it increases with particle impact velocity. Furthermore, the heat transfer coefficient decreases drastically with the particle size. In helium gas, it was found that at low particle impact fluxes, the difference between the coefficients in helium and in air is small, whereas at high fluxes, the difference becomes large. A length scale, V/nd(p)(2), was used to correlate the data. At low particle Reynolds numbers, gas-mediated hear conduction was identified as the dominant particle/surface heat transfer mechanism, whereas at high particle Reynolds numbers, induced gas convection was the dominant mechanism. C1 UNIV MICHIGAN,DEPT MECH ENGN,ANN ARBOR,MI 48109. RP Sun, JG (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 22 TC 2 Z9 3 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD NOV PY 1995 VL 117 IS 4 BP 1028 EP 1035 DI 10.1115/1.2836277 PG 8 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA TT893 UT WOS:A1995TT89300031 ER PT J AU Zeng, SQ Hunt, A Greif, R AF Zeng, SQ Hunt, A Greif, R TI Geometric structure and thermal conductivity of porous medium silica aerogel SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article C1 UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720. RP Zeng, SQ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 10 TC 65 Z9 78 U1 3 U2 31 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD NOV PY 1995 VL 117 IS 4 BP 1055 EP 1058 DI 10.1115/1.2836281 PG 4 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA TT893 UT WOS:A1995TT89300035 ER PT J AU Slayzak, SJ Viskanta, R Incropera, FP AF Slayzak, SJ Viskanta, R Incropera, FP TI Effect of dissimilar impingement velocities on local heat transfer for adjacent rows of circular free-surface jets SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article C1 PURDUE UNIV,SCH MECH ENGN,W LAFAYETTE,IN 47907. RP Slayzak, SJ (reprint author), NATL RENEWABE ENERGY LAB,GOLDEN,CO 80401, USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD NOV PY 1995 VL 117 IS 4 BP 1061 EP 1064 DI 10.1115/1.2836283 PG 4 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA TT893 UT WOS:A1995TT89300037 ER PT J AU LONG, MA MORIMOTO, H WILLIAMS, PG AF LONG, MA MORIMOTO, H WILLIAMS, PG TI VERY HIGH ISOTOPE INCORPORATION IN THE C-1 POSITION OF GLUCOSE BY EXCHANGE WITH DEUTERIUM OR TRITIUM GAS SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS LA English DT Article DE GLUCOSE; TRITIUM GAS; DEUTERIUM GAS; PALLADIUM CATALYST; TRITIUM NMR; DEUTERIUM NMR AB The experimental conditions which control the exchange from deuterium or tritium gas into the C-1 proton position of glucose in aqueous solution have been studied in detail, with a view to determining the factors which maximize exchange into glucose, but minimize exchange into the solvent water. The favoured conditions for producing glucose with close to 100% isotope labelling in the C-1 position, and with negligible formation of labelled byproducts, were a reaction time of 6 to 8 hours, a temperature of 60 degrees C, and a pH of 7 or higher. Pd/BaSO4 was the preferred catalyst and slow pre-addition of the deuterium or tritium gas to the catalyst bed was essential to maximize the subsequent isotope exchange into the substrate. C1 LAWRENCE BERKELEY LAB,NATL TRITIUM LABELLING FACIL,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV BIOL STRUCT,BERKELEY,CA 94720. NR 14 TC 1 Z9 1 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 NOV PY 1995 VL 36 IS 11 BP 1037 EP 1049 DI 10.1002/jlcr.2580361104 PG 13 WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry, Analytical; Pharmacology & Pharmacy SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry GA TC062 UT WOS:A1995TC06200003 ER PT J AU BENNETT, TA SCHAMMEL, CMG LYNAM, EB GUYER, DA MELLORS, A EDWARDS, B ROGELJ, S SKLAR, LA AF BENNETT, TA SCHAMMEL, CMG LYNAM, EB GUYER, DA MELLORS, A EDWARDS, B ROGELJ, S SKLAR, LA TI EVIDENCE FOR A 3RD COMPONENT IN NEUTROPHIL AGGREGATION - POTENTIAL ROLES OF O-LINKED GLYCOPROTEINS AS L-SELECTIN COUNTER-STRUCTURES SO JOURNAL OF LEUKOCYTE BIOLOGY LA English DT Article DE BETA(2)-INTEGRIN ADHESION; MOLECULES INFLAMMATION; MUCIN ID MYELOID CELLS; P-SELECTIN; MONOCLONAL-ANTIBODY; SIALOPHORIN; LEUKOSIALIN; EXPRESSION; ADHESION; CD43; OLIGOSACCHARIDES; ANTIGEN AB The homotypic aggregation of neutrophils requires the participation of L-selectin and the Beta(2)-integrins, but it has not been clear whether the two receptors recognize one another as counter-structures or whether other adhesion molecules are involved, We have examined aggregation of live neutrophils with target populations, manipulated to alter expression of adhesive epitopes, using flow cytometry, A target population depleted of both L-selectin and activatable beta(2)-integrin displayed an ability to aggregate with live neutrophils, suggesting that these two molecules are not counter-structures. We also found that an O-sialoglycoprotease (GCP) from Pasteurella haemolytica is capable of inhibiting homotypic aggregation Neutrophils treated with GCP lose O-glycosylated proteins but retain L-selectin and activatable Beta(2)-integrin. One or more of the GCP substrates appears to function in L-selectin-dependent binding but not in beta(2)-integrin-dependent binding. Together the data suggest a mechanism of aggregation that is analogous to leukocyte-endothelial cell adhesion in which a low-affinity carbohydrate-dependent interaction precedes a high-affinity integrin-dependent adhesion. C1 UNIV NEW MEXICO,SCH MED,CTR CANC RES & TREATMENT,DEPT PATHOL,DIV CYTOMETRY,ALBUQUERQUE,NM 87131. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. UNIV GUELPH,GUELPH WATERLOO CTR GRAD WORK CHEM,GUELPH,ON N1G 2W1,CANADA. LOVELACE INST,INST BASIC & APPL MED RES,ALBUQUERQUE,NM. FU NCI NIH HHS [ACS CB162]; NHLBI NIH HHS [HL43026]; NIGMS NIH HHS [GM37696] NR 46 TC 23 Z9 23 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0741-5400 J9 J LEUKOCYTE BIOL JI J. Leukoc. Biol. PD NOV PY 1995 VL 58 IS 5 BP 510 EP 518 PG 9 WC Cell Biology; Hematology; Immunology SC Cell Biology; Hematology; Immunology GA TE220 UT WOS:A1995TE22000003 PM 7595051 ER PT J AU TANGIRALA, RK RUBIN, EM PALINSKI, W AF TANGIRALA, RK RUBIN, EM PALINSKI, W TI QUANTITATION OF ATHEROSCLEROSIS IN MURINE MODELS - CORRELATION BETWEEN LESIONS IN THE AORTIC ORIGIN AND IN THE ENTIRE AORTA, AND DIFFERENCES IN THE EXTENT OF LESIONS BETWEEN SEXES IN LDL RECEPTOR-DEFICIENT AND APOLIPOPROTEIN E-DEFICIENT MICE SO JOURNAL OF LIPID RESEARCH LA English DT Article DE ARTERIOSCLEROSIS; MORPHOMETRY ID DENSITY LIPOPROTEIN LEVELS; SUSCEPTIBILITY; HYPERCHOLESTEROLEMIA; PROGRESSION; METABOLISM; ATH-1 AB Murine strains susceptible to atherosclerosis provide valuable models to study factors involved in atherogenesis. In some murine models, limited hypercholesterolemia can be achieved and lesions develop primarily in the aortic origin, in the vicinity of the aortic valve. In other models such as LDL receptor-deficient and apoE-deficient mice, diet-induced or spontaneous hypercholesterolemia and atherogenesis are much greater. To determine whether lesion formation in the aortic origin, where particular pathogenic conditions may exist, correlates with lesion formation throughout the entire aorta, we measured the extent of atherosclerosis in both areas in 8 apoE- and 11 LDL receptor-deficient mice fed cholesterol-rich diets for 3-6 months, as well as in 9 C57BL/6 mice fed an atherogenic diet for a year, using two different morphometric methods. Both apoE-deficient and LDL receptor-deficient mice developed extensive lesions throughout the aorta, and in these models a significant correlation was observed between the extent of lesions in the entire aorta (measured as percent of surface area) and that at the aortic origin (measured as averaged lesion area per cross-section)(r = 0.77, P<0.0001). In contrast, the plasma cholesterol levels achieved in C57BL/6 mice were much lower, and atherosclerotic lesions were found almost exclusively in the aortic origin. These results demonstrate that in murine models developing extensive aortic lesions, both morphometric methods provide valid and complementary information on the degree and distribution of atherosclerosis, and suggest that under severe atherogenic conditions lesion formation throughout the aorta is determined by the same pathological factors, in each model. Comparison of the extent of atherosclerosis in the entire aorta between genders also showed that male LDL receptor-deficient mice had significantly more lesions than females (29.2 vs. 14.8%, P<0.005, n = 16). A similar trend was also seen in apoE-deficient mice. C1 UNIV CALIF SAN DIEGO,DEPT MED,LA JOLLA,CA 92093. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CELLULAR & MOLEC BIOL,BERKELEY,CA 94720. FU NHLBI NIH HHS [HL14197] NR 29 TC 363 Z9 373 U1 0 U2 7 PU LIPID RESEARCH INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0022-2275 J9 J LIPID RES JI J. Lipid Res. PD NOV PY 1995 VL 36 IS 11 BP 2320 EP 2328 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TH829 UT WOS:A1995TH82900006 PM 8656070 ER PT J AU LIN, SW KOUROUDIS, I JANSEN, AGM WYDER, P LUTHI, B HINKS, DG KETTERSON, JB LEVY, M SARMA, BK AF LIN, SW KOUROUDIS, I JANSEN, AGM WYDER, P LUTHI, B HINKS, DG KETTERSON, JB LEVY, M SARMA, BK TI ULTRASONIC VELOCITY AND ATTENUATION MEASUREMENTS AT THE METAMAGNETIC TRANSITION IN UPT3 SO JOURNAL OF LOW TEMPERATURE PHYSICS LA English DT Article AB The longitudinal ultrasonic attenuation and velocity were measured on a single crystal of UPt3 in a high magnetic field of up to 23T. Earlier ultrasonic measurements had seen a softening of the lattice as evidenced by a huge drop in the velocity at a field of 20T. Both the attenuation and velocity have been measured in field sweeps. Accompanying the large dip in the velocity is a large attenuation peak at this metamagnetic transition. Measurements were also done at several frequencies. C1 UNIV FRANKFURT, W-6000 FRANKFURT, GERMANY. ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. UNIV WISCONSIN, DEPT PHYS, MILWAUKEE, WI 53201 USA. RP LIN, SW (reprint author), NORTHWESTERN UNIV, DEPT PHYS, EVANSTON, IL 60208 USA. RI Ketterson, John/B-7234-2009 NR 6 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2291 J9 J LOW TEMP PHYS JI J. Low Temp. Phys. PD NOV PY 1995 VL 101 IS 3-4 BP 635 EP 640 DI 10.1007/BF00753366 PG 6 WC Physics, Applied; Physics, Condensed Matter SC Physics GA TE696 UT WOS:A1995TE69600052 ER PT J AU Cooke, DW Bennett, BL AF Cooke, DW Bennett, BL TI Long-lived luminescence from commonly used Apiezon compounds SO JOURNAL OF LUMINESCENCE LA English DT Article AB Long-lived (similar to 12 s) luminescence from Apiezon compounds (greases and wax) has been measured following ultraviolet or visible excitation in the temperature regime 8-300 K. A typical spectrum consists of a single Gaussian band centered near 2.2 eV. The intensity of this band is maximum at the lowest temperature investigated (8 K), decreases nonlinearly with increasing temperature, and becomes undetectable near 250 K. Spectral peak position and full-width at half-maximum remain approximately constant throughout this temperature interval for fixed measurement times. Time decay measurements at 8 K show an increase in peak position with increasing time lapse since optical excitation. The time dependence of peak intensities as a function of temperature can be described by I(t) = [Aexp(-alpha t)]/[1 + B{1 - exp(alpha t)}], consistent with P-type delayed fluorescence arising from triplet-state deexcitation in organic molecules. Although the composition of Apiezon compounds is proprietary they are known to contain a high proportion of hydrocarbons. The single Gaussian emission band and long fluorescence lifetime is consistent with previous observations on hydrocarbons. Because Apiezon compounds are easily excited, yielding fairly intense luminescence, caution must be exercised when using them in optical experiments. RP Cooke, DW (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 6 TC 1 Z9 1 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2313 J9 J LUMIN JI J. Lumines. PD NOV PY 1995 VL 65 IS 6 BP 283 EP 288 DI 10.1016/0022-2313(95)00087-9 PG 6 WC Optics SC Optics GA TY908 UT WOS:A1995TY90800001 ER PT J AU SNOECK, E SINCLAIR, R PARKER, MA HYLTON, TL COFFEY, KR HOWARD, JK LESSMANN, A BIENENSTOCK, AI AF SNOECK, E SINCLAIR, R PARKER, MA HYLTON, TL COFFEY, KR HOWARD, JK LESSMANN, A BIENENSTOCK, AI TI MICROSTRUCTURAL EVOLUTION OF NIFE/AG MULTILAYERS STUDIED BY X-RAY-DIFFRACTION AND IN-SITU HIGH-RESOLUTION TEM SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID GIANT MAGNETORESISTANCE; SUPERLATTICES AB X-ray diffraction and in situ high-resolution electron microscopy experiments have been performed to study the effect of annealing on the microstructure of permalloy/silver multilayers. Both techniques show that the silver diffuses into the permalloy grain boundaries creating so-called 'silver bridges'. This bridging is expected to be responsible for the giant magnetoresistance effect observed at low fields in these devices. Moreover, unexpected permalloy diffusion and recrystallization have also been observed in the in situ TEM experiments. C1 CNRS,CEMES,LOE,F-31055 TOULOUSE,FRANCE. IBM CORP,SAN JOSE,CA 95193. MICROUNITY SYST ENGN,SUNNYVALE,CA 94089. STANFORD UNIV,SSRL,STANFORD,CA 94309. RP SNOECK, E (reprint author), STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305, USA. NR 16 TC 20 Z9 20 U1 2 U2 4 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 NOV PY 1995 VL 151 IS 1-2 BP 24 EP 32 DI 10.1016/0304-8853(95)00409-2 PG 9 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA TJ230 UT WOS:A1995TJ23000007 ER PT J AU HEID, C WEITZEL, H BURLET, P BONNET, M GONSCHOREK, W VOGT, T NORWIG, J FUESS, H AF HEID, C WEITZEL, H BURLET, P BONNET, M GONSCHOREK, W VOGT, T NORWIG, J FUESS, H TI MAGNETIC PHASE-DIAGRAM OF CONB2O6 - A NEUTRON-DIFFRACTION STUDY SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article ID REFINEMENT AB Elastic neutron diffraction experiments were performed using both a powder sample and a single crystal of CoNb2O6. An intermediate and in the b-direction incommensurate magnetic structure between 2.95 and 1.97 K was found by a least-squares refinement to be sinusoidally modulated with moments lying in the a-c plane, including an angle of gamma = 29.6 degrees with the c-axis. The temperature-dependent propagation vector is k = (0 k(y) 0) with 0.37 less than or equal to k(y) less than or equal to 0.5 for 2.95 K greater than or equal to T greater than or equal to 1.97 K. The magnetic phase diagram for an external field applied in the c-axis direction was determined. With increasing field, two spin-flip phases could be found. Their propagation vectors are k = (0 1/3 0) at lower fields and k = (0 1/2 0) at higher fields. C1 CEN GRENOBLE,F-38041 GRENOBLE,FRANCE. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP HEID, C (reprint author), TH DARMSTADT,FACHBEREICH MAT WISSENSCH,FACGEBEIT STRUKTURFORSCH,D-64287 DARMSTADT,GERMANY. RI Vogt, Thomas /A-1562-2011 OI Vogt, Thomas /0000-0002-4731-2787 NR 19 TC 28 Z9 28 U1 0 U2 10 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 NOV PY 1995 VL 151 IS 1-2 BP 123 EP 131 DI 10.1016/0304-8853(95)00394-0 PG 9 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA TJ230 UT WOS:A1995TJ23000020 ER PT J AU SIEGMANN, HC GARWIN, EL PRESCOTT, CY HEIDMANN, J MAURI, D WELLER, D ALLENSPACH, R WEBER, W AF SIEGMANN, HC GARWIN, EL PRESCOTT, CY HEIDMANN, J MAURI, D WELLER, D ALLENSPACH, R WEBER, W TI MAGNETISM WITH PICOSECOND FIELD PULSES SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Letter ID DOMAINS AB Ultrashort magnetic field pulses of 6 ps duration surrounding the focus of 50 GeV electron bunches are shown to write a magnetic pattern into both perpendicular and in-plane metallic magnetic recording films. High-resolution magnetic contrast images reveal the elementary processes necessary to induce magnetization reversal as well as rotation of the magnetization into the field direction. C1 IBM CORP,ALMADEN RES CTR,DIV RES,SAN JOSE,CA 95120. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. IBM CORP,DIV STORAGE SYST,SAN JOSE,CA 95193. IBM CORP,DIV RES,ZURICH RES LAB,CH-8803 RUSCHLIKON,SWITZERLAND. NR 12 TC 26 Z9 26 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 NOV PY 1995 VL 151 IS 1-2 BP L8 EP L12 DI 10.1016/0304-8853(95)00602-8 PG 5 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA TJ230 UT WOS:A1995TJ23000004 ER PT J AU EHRENBERG, H SVOBODA, I WLTSCHEK, G WIESMANN, M TROUW, F WEITZEL, H FUESS, H AF EHRENBERG, H SVOBODA, I WLTSCHEK, G WIESMANN, M TROUW, F WEITZEL, H FUESS, H TI CRYSTAL AND MAGNETIC-STRUCTURE OF ALPHA-NIMOO4 SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article AB The crystal and magnetic structures of alpha-NiMoO4 were determined by single-crystal X-ray diffraction on the one hand, and elastic neutron powder scattering on the other. The compound was prepared by subsolidus reaction and crystallizes with Ni and Mo ions in oxygen octahedra, space group C2/m. Below 19 K antiferromagnetic ordering is observed. The magnetic unit cell has a doubled c-axis, i.e. k = (0,0,1/2), and the magnetic space group is C(2C)2/m'. The Ni ions occupy two different sites, so that two sublattices have to be distinguished. By neglecting the small canting angle between these sublattices, the magnetic structure is collinear and all moments within one chemical cell are parallel. The magnetic structure can be described by a sequence of such cells with alternating signs along the c-direction. At 1.5 K the absolute values of the magnetic moments and their canting angles with the alpha-axis (in the +alpha,+ c quadrant) are determined to be \mu(Ni2+)\ = 1.62(10)mu(B) and 75(10)degrees for the ions on mirror planes (Ni(1) site) and to \mu(Ni2+)\ = 1.45(15)mu(B) and 55(10)degrees for the ions on screw axes (Ni(2) site). From a Curie-Weiss fit in the paramagnetic region a Curie-Weiss temperature of 22(2)K and a magnetic moment of 3.05(5)mu(B) for each Ni2+ ion are derived. These values are in good agreement with those predicted by Hund's rules. C1 ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. RP EHRENBERG, H (reprint author), TH DARMSTADT,FACHBEREICH MAT WISSENSCH,FACHGEBIET STRUKT FORSCH,D-64287 DARMSTADT,GERMANY. RI Ehrenberg, Helmut/M-7090-2013 OI Ehrenberg, Helmut/0000-0002-5134-7130 NR 12 TC 19 Z9 20 U1 3 U2 9 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 NOV PY 1995 VL 150 IS 3 BP 371 EP 376 DI 10.1016/0304-8853(95)00290-1 PG 6 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA TG222 UT WOS:A1995TG22200012 ER PT J AU DEAN, KA BUCHHOLZ, DB MARKS, LD CHANG, RPH VUCHIC, BV MERKLE, KL STUDEBAKER, DB MARKS, TJ AF DEAN, KA BUCHHOLZ, DB MARKS, LD CHANG, RPH VUCHIC, BV MERKLE, KL STUDEBAKER, DB MARKS, TJ TI YBA(2)CU(3)O7-DELTA ON MGO FILMS GROWN BY PULSED ORGANOMETALLIC BEAM EPITAXY AND A GRAIN-BOUNDARY JUNCTION APPLICATION SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CHEMICAL-VAPOR-DEPOSITION; YBA2CU3O7 THIN-FILMS; BUFFER LAYERS; OXIDE-FILMS; Y1BA2CU3O7-X; ORIENTATION; SAPPHIRE; MOCVD; GAAS; CUO AB MgO films and YBa2Cu3O7-delta/MgO multilayer films were developed with the pulsed organometallic beam epitaxy (POMBE) growth technique, and grain boundary junctions were fabricated from the films to demonstrate the utility of the multilayers. High-quality MgO films were grown on LaAlO3 substrates by POMBE using a Mg(dpm)(2) precursor. MgO crystallinity, as assessed by x-ray diffraction rocking curves, improved with the use of CuOx or YBa2Cu3O7-delta buffer layers. YBa2Cu3O7-delta films grown on the MgO layer by POMBE exhibited a T-c0 of 83 K and a J(c) (12 K) exceeding 10(6) A/cm(2) for applied magnetic fields up to 3 X 10(4) G. Grain boundary junctions were formed by growing YBa2Cu3O7-delta on MgO films that had been pretreated with a simple sputtering technique. This sputtering induces a controlled, 45 degrees grain boundary in subsequently deposited YBa2Cu3O7-delta films. The resulting boundary showed weak-link current-voltage behavior and an I(c)R(n) product of 52 mu V at 10 K, demonstrating that sputter-induced grain boundary junctions are compatible with multilayer technology. C1 NORTHWESTERN UNIV,NSF SCI & TECHNOL CTR SUPERCONDUCT,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,NSF SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT CHEM,EVANSTON,IL 60208. RP DEAN, KA (reprint author), NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208, USA. RI Marks, Laurence/B-7527-2009; Chang, R.P.H/B-7505-2009; Schaff, William/B-5839-2009 NR 28 TC 10 Z9 10 U1 1 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 NOV PY 1995 VL 10 IS 11 BP 2700 EP 2707 DI 10.1557/JMR.1995.2700 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA TC367 UT WOS:A1995TC36700005 ER PT J AU JIANG, WB NORTON, MG POKER, DB AF JIANG, WB NORTON, MG POKER, DB TI EFFECT OF ION FLUENCE ON THE SURFACE-MORPHOLOGY OF SINGLE-CRYSTAL MAGNESIUM-OXIDE IMPLANTED WITH XENON SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HELIUM; METALS; GAS AB The surface morphology (001)-oriented single-crystal magnesium oxide (MgO) implanted with xenon ions has been examined using atomic force microscopy. It was found that at the lowest fluence used in this study (1.0 x 10(14)/cm(2)), a slight roughening of the (001) surface occurred. The magnitude of this roughening remained fairly constant with increases in fluence in the range 1.0 x 10(14)/cm(2) to 3.0 x 10(16)/cm(2). Implantation at fluences of greater than or equal to 1.0 x 10(17)/cm(2) caused significant surface roughening with the concomitant formation of micron-sized blisters. The appearance of some of these blisters resembles the rosette pattern that is also observed when the cleaved surfaces of MgO crystals are etched following indentation using a spherical indenter. This observation suggests that these blisters are formed by the growth of xenon inclusions, during implantation, by a dislocation loop punching mechanism. C1 WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164. OAK RIDGE NATL LAB,SURFACE MODIFICAT & CHARACTERIZAT RES FACIL,OAK RIDGE,TN 37831. NR 20 TC 5 Z9 5 U1 1 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 NOV PY 1995 VL 10 IS 11 BP 2823 EP 2828 DI 10.1557/JMR.1995.2823 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA TC367 UT WOS:A1995TC36700022 ER PT J AU FRIEDMAN, HL RAINERI, FO PERNG, BC AF FRIEDMAN, HL RAINERI, FO PERNG, BC TI MOLECULAR THEORY OF SOLVATION PROCESSES IN DIPOLAR AND NONDIPOLAR SOLVENTS SO JOURNAL OF MOLECULAR LIQUIDS LA English DT Article; Proceedings Paper CT 42nd Yamada Conference on Structure, Fluctuation, and Relaxation in Solution CY DEC 11-15, 1994 CL NAGOYA, JAPAN ID DYNAMICS; LIQUIDS; WATER AB We describe a molecular theory of solvation dynamics which provides a detailed description of the mechanism of solvent response following a sudden change in the charge distribution of a solute molecule. The theory is based on a new renormalized linear response development which incorporates nonlinear aspects of equilibrium solvation. The solute-solvent coupling is formulated in terms of intermolecular interactions, without recourse to macroscopic cavity concepts. Both the solute and solvent are represented by interaction site models, while the dynamical aspects are treated with our previously developed Reference Memory Function Approximation. The results for solvation dynamics in water and acetonitrile compare very favourably with MD simulation results for the same model systems. The same renormalized dynamical theory of solvation provides a very useful framework for estimating free energy profiles and associated parameters (average vertical energy gap, reorganization energy, change in solvation free energy) for electron transfer reactions. The new results demonstrate that a reasonably detailed molecular theory that deals with models incorporating the charge distribution of the molecules explains the solvation properties relevant to the theory of electron transfer reactions in both dipolar and non-dipolar (polar) solvents. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 16 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-7322 J9 J MOL LIQ JI J. Mol. Liq. PD NOV PY 1995 VL 65-6 BP 7 EP 14 DI 10.1016/0167-7322(95)00839-7 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TK241 UT WOS:A1995TK24100004 ER PT J AU ESPENSON, JH AF ESPENSON, JH TI ORGANOMETALLIC FREE-RADICALS IN SOLUTION SO JOURNAL OF MOLECULAR LIQUIDS LA English DT Article; Proceedings Paper CT 42nd Yamada Conference on Structure, Fluctuation, and Relaxation in Solution CY DEC 11-15, 1994 CL NAGOYA, JAPAN ID 17-ELECTRON; TUNGSTEN AB Laser flash photolysis of [CPM(CO)(3)](2) (M = W, Mo, and Cr) provides a convenient source of CpM(CO)(3)(.), an organometallic free radical with 17 valence electrons. It is a transient and highly reactive species. Depending on the circumstances and the other reagents present, the radical will dimerize, undergo halogen and hydrogen atom abstraction reactions, and electron transfer reactions. With tetramethyl-phenylenediamine, there is a cyclic process of electron transfer steps, the net result of which is the catalyzed disproportionation of the metal radical. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP ESPENSON, JH (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 11 TC 3 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-7322 J9 J MOL LIQ JI J. Mol. Liq. PD NOV PY 1995 VL 65-6 BP 205 EP 212 DI 10.1016/0167-7322(95)00853-1 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TK241 UT WOS:A1995TK24100027 ER PT J AU SCOTT, B LOVE, SP KANNER, GS JOHNSON, SR WILKERSON, MP BERKEY, M SWANSON, BI SAXENA, A HUANG, XZ BISHOP, AR AF SCOTT, B LOVE, SP KANNER, GS JOHNSON, SR WILKERSON, MP BERKEY, M SWANSON, BI SAXENA, A HUANG, XZ BISHOP, AR TI CONTROL OF SELECTED PHYSICAL-PROPERTIES OF MX SOLIDS - AN EXPERIMENTAL AND THEORETICAL INVESTIGATION SO JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID CHARGE-DENSITY-WAVE; LINEAR-CHAIN COMPOUNDS; CRYSTAL-STRUCTURE; RESONANCE RAMAN; MOLECULAR-STRUCTURE; METAL-COMPLEXES; ELECTRON; STATE; TRANSITION; MODEL AB A series of eight materials of stoichiometry [Pt(L-L)(2)X(2)][Pt(L-L)(2)]Y-4 (X is Cl, Br; L-L is 1,2-diaminoethane (en) or 1,2-diaminocyclohexane (chxn); Y is ClO4-, X(-)) were synthesized. Crystal structures were determined for the compounds [Pt(chxn)(2)Cl-2][Pt(chxn)(2)](ClO4)(4) 1, [Pt(chxn)(2)Br-2][Pt(chxn)(2)](ClO4)(4) 2, and [Pt(chxn)(2)Br-2][Pt(chxn)(2)]Br-4 4. All three of these compounds crystallize in the orthorhombic space group I222. Compound 1 has a = 5.711(1) Angstrom, b = 7.804(1) Angstrom, c = 24.101(7) Angstrom, Z = 1, d(x) = 2.033 g cm(-3). Compound 2 has a = 5.781(1) Angstrom, b = 7.720(1) Angstrom, c = 24.036(5) Angstrom, Z = 1, d(x) = 2.174 g cm(-3). Compound 4 has a = 5.379(1) Angstrom, b = 7.028(1) Angstrom, c = 23.884(4) Angstrom, Z = 1, d(x), = 2.440 g cm(-3). These solids contain pseudo one-dimensional chains with a charge-density-wave (CDW) ground state structure: X-Pt(IV)-X ... Pt(II)... X. Single crystal resonance Raman experiments were performed on all compounds to measure the symmetric X-Pt-X stretching frequency nu(1) and the band edge. It is shown that the optical and electronic properties and, therefore, the CDW strength of these one-dimensional materials may be systematically varied over a wide range by employing different combinations of L-L and Y; templates composed of hydrogen bonded networks of L-L and Y were found to control the metal-metal separation, thereby controlling the X-Pt(IV)-X ... Pt(II)... X chain geometry. Relationships between the CDW strength, measured as the ratio of the short M(IV)-X distance to the long M(II)-X distance, the band gap energy nu(1) and the Pt-Pt separation are developed. The reaction coordinate is found to be dominated by changes in the M-M and Pt(II)-X separations over most of the range studied, with contributions from changes in the Pt-IV-X bonds becoming important only at the smallest M-M separations. Direct evidence demonstrating that MX systems are true Peierls distorted systems is also presented. These results are consistent with modeling based on Peierls-Hubbard hamiltonians. This work explains the unusual pressure and temperature dependences that have been observed for the structures and optical properties of this class of materials and also provides a wealth of information to benchmark many-body theoretical calculations modeling electron-electron and electron-phonon interactions in one-dimensional materials. C1 UNIV CALIF LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 48 TC 31 Z9 31 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2860 J9 J MOL STRUCT JI J. Mol. Struct. PD NOV 1 PY 1995 VL 356 IS 3 BP 207 EP 229 DI 10.1016/0022-2860(95)08935-O PG 23 WC Chemistry, Physical SC Chemistry GA TF383 UT WOS:A1995TF38300006 ER PT J AU BROW, RK TALLANT, DR MYERS, ST PHIFER, CC AF BROW, RK TALLANT, DR MYERS, ST PHIFER, CC TI THE SHORT-RANGE STRUCTURE OF ZINC POLYPHOSPHATE GLASS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID X-RAY-DIFFRACTION; META-PHOSPHATE GLASSES; SILICATE-GLASSES; MAS-NMR; ORDER; RAMAN AB P-31 magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy and Raman spectroscopy have been used to examine the polyhedral arrangements in xZnO . (1 - x)P2O5 (0.50 less than or equal to x less than or equal to 0.71) glasses. The depolymerization of P metaphosphate chains by the addition of ZnO is quantitatively described by the increase in the concentration of Q(1)-phosphate sites, determined from the P-31 MAS-NMR spectra. When x > 0.60, the NMR and Raman spectra exhibit peaks due to Q(0) and Q(2) tetrahedra, indicating that structures disproportionate in glass melts near the pyrophosphate composition. The splitting of the Raman peak due to the Q(1) terminal oxygen stretching mode indicates that a variety of P-O-Zn bonds participate in the polyphosphate glass structure. The complex mixture of P and Zn polyhedra contributes to the glass-forming tendency of the high ZnO (> 60 mol%) compositions. RP BROW, RK (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 37 TC 298 Z9 298 U1 5 U2 44 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 NOV PY 1995 VL 191 IS 1-2 BP 45 EP 55 DI 10.1016/0022-3093(95)00289-8 PG 11 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA TD007 UT WOS:A1995TD00700006 ER PT J AU VANRAAP, MBF REGAN, MJ BIENENSTOCK, A AF VANRAAP, MBF REGAN, MJ BIENENSTOCK, A TI EVIDENCE OF PHASE-SEPARATION IN AMORPHOUS FEXSI1-X FILMS SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID ALLOYS; SCATTERING; MOSSBAUER AB Anomalous small-angle X-ray scattering studies of magnetron sputtered FexSi1-x alloys (0.044 less than or equal to x less than or equal to 0.54) have been performed. For films with compositions between 4.4 and 23 at.% Fe, there is a strong, anisotropic small-angle scattering maximum that is dependent on the X-ray energy near the Fe K-edge. Based on the similarity of these results with those reported for amorphous M-Ge (M = Fe, Mo, W) alloys and on the observations reported in the present paper, the Si atoms are most likely distributed homogeneously. The scattering results from an inhomogeneous distribution of Fe atoms. Density calculations indicate phase separation into regions of a-Si and an intermetallic close in composition to a-FeSi2, consistent with the disappearance of this scattering maximum for x greater than or equal to 0.34. Analysis of the scattering in terms of correlation functions indicates that the phase-separated regions are well correlated in the film plane and of the order of 0.6 nm. In the growth direction, however, the regions are poorly correlated and typically 1 nm in size. The metal/insulator transition, which occurs in a composition range in which phase separation is observed, thus apparently results from the percolation of metallic a-FeS2 in a-Si and not from a continuous, homogeneous structural transition from an open network to a dense intermetallic structure. C1 STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. NR 21 TC 13 Z9 13 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 NOV PY 1995 VL 191 IS 1-2 BP 155 EP 163 DI 10.1016/0022-3093(95)00286-3 PG 9 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA TD007 UT WOS:A1995TD00700019 ER PT J AU Weinberg, AM AF Weinberg, AM TI Social institutions and nuclear energy-II SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY LA English DT Article RP OAK RIDGE ASSOCIATED UNIV, POB 117, OAK RIDGE, TN 37831 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0022-3131 EI 1881-1248 J9 J NUCL SCI TECHNOL JI J. Nucl. Sci. Technol. PD NOV PY 1995 VL 32 IS 11 BP 1071 EP 1080 DI 10.1080/18811248.1995.9731821 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TL830 UT WOS:A1995TL83000001 ER PT J AU Chadwick, MB Young, PG Chiba, S AF Chadwick, MB Young, PG Chiba, S TI Photonuclear angular distribution systematics in the quasideuteron regime SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY LA English DT Article DE photonuclear reactions; continuum angular distributions; systematics; light particles; quasideuteron regime; preequilibrium reactions ID MODEL AB We describe an applications-oriented method for determining continuum photonuclear angular distributions for emission of light particles (n, p, d, t, He-3, and alpha) in the quasideuteron regime (40 less than or equal to E(inc) less than or equal to 140 MeV). Based on theoretical considerations by Chadwick and Oblozinsky for the angular forward-peaking in preequilibrium reactions, Kalbach's 1988 angular distribution systematics for a neutron projectile can be straightforwardly modified for use in photon-induced reactions. This results in photonuclear angular distributions which are less forward-peaked than their nucleon-induced counterparts, due to the small momentum carried by a photon. Our predictions are compar ed against double-differential monochromatic C-12 (gamma, xp) data at 60 and 80 MeV and are seen to describe the measurements fairly well. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. JAPAN ATOM ENERGY RES INST, TOKAI RES ESTAB, TOKAI, IBARAKI 31911, JAPAN. RP LAWRENCE LIVERMORE NATL LAB, NUCL DATA GRP, LIVERMORE, CA 94550 USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0022-3131 EI 1881-1248 J9 J NUCL SCI TECHNOL JI J. Nucl. Sci. Technol. PD NOV PY 1995 VL 32 IS 11 BP 1154 EP 1158 DI 10.1080/18811248.1995.9731830 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TL830 UT WOS:A1995TL83000010 ER PT J AU Sutherland, BM AF Sutherland, BM TI Action spectroscopy in complex organisms: Potentials and pitfalls in predicting the impact of increased environmental UVB SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY LA English DT Article; Proceedings Paper CT International Workshop on Biological UV Dosimetry CY NOV 29-DEC 03, 1994 CL BUDAPEST, HUNGARY DE action spectra; complex organisms; environmental WE ID SKIN-CANCER; SUNLIGHT; DNA AB Evaluating the effects of broad spectrum sources, including sunlight, on humans and their environment requires knowledge both of the effects of various wavelengths of radiation in those sources on biological systems and of the kinds and magnitude of changes in those sources. Action spectroscopy - the determination of the effect of radiation on an organism as a function of wavelength - provides a major method for evaluating the effects of a source, including that of changes in its intensity and wavelength distribution. Although action spectra for UV radiation damage to higher organisms can give useful information, inappropriate analyses can lead to misleading or even incorrect results. It is thus essential to consider carefully methods of analyzing action spectra and their consequences for evaluating the effects of changes in the solar spectrum. RP Sutherland, BM (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 9 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 1011-1344 J9 J PHOTOCH PHOTOBIO B JI J. Photochem. Photobiol. B-Biol. PD NOV PY 1995 VL 31 IS 1-2 BP 29 EP 34 DI 10.1016/1011-1344(95)07165-X PG 6 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TK775 UT WOS:A1995TK77500006 PM 8568602 ER PT J AU DETLEFS, C LANG, JC SRAJER, G GOLDMAN, AI WANG, X HARMON, BN MCCALLUM, RW AF DETLEFS, C LANG, JC SRAJER, G GOLDMAN, AI WANG, X HARMON, BN MCCALLUM, RW TI EVIDENCE FOR QUADRUPOLAR CONTRIBUTIONS TO THE CIRCULAR MAGNETIC-X-RAY DICHROISM OF RARE-EARTHS SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT 1994 Conference on Magneto-optic Materials CY JUN 16-18, 1994 CL LOS ALAMOS, NM DE MAGNETIC MATERIALS; XAFS (EXAFS AND XANES); ELECTRONIC STRUCTURE ID ABSORPTION; SCATTERING; (RE)2CO17; SPECTRA; METAL AB CMXD provides a new probe of local magnetism in ferro(i)magnetic materials. Here, we describe a recent study of the angular dependence of the circular magnetic X-ray dichroism (CMXD) at the Dy-L(3) edge of the alloy Dy0.4TB0.6 to determine the multipolar nature of the dichroic features above and below the absorption edge. Differences in the angular behavior of the feature below the edge are consistent with quadrupolar transitions. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. RP DETLEFS, C (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. RI Detlefs, Carsten/B-6244-2008 OI Detlefs, Carsten/0000-0003-2573-2286 NR 25 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 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD NOV PY 1995 VL 56 IS 11 BP 1517 EP 1519 DI 10.1016/0022-3697(95)00121-2 PG 3 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA RW502 UT WOS:A1995RW50200005 ER PT J AU HARMON, BN ANTROPOV, VP LIECHTENSTEIN, AI SOLOVYEV, IV ANISIMOV, VI AF HARMON, BN ANTROPOV, VP LIECHTENSTEIN, AI SOLOVYEV, IV ANISIMOV, VI TI CALCULATION OF MAGNETOOPTICAL PROPERTIES FOR 4F SYSTEMS - LSDA PLUS HUBBARD-U RESULTS SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT 1994 Conference on Magneto-optic Materials CY JUN 16-18, 1994 CL LOS ALAMOS, NM DE MAGNETIC MATERIALS; OPTICAL MATERIALS; ELECTRONIC STRUCTURE; MAGNETIC PROPERTIES; OPTICAL PROPERTIES ID GADOLINIUM; METALS AB The electronic structure of gadolinium metal and CeSb has been calculated using a density functional method which explicitly includes the Coulomb parameter U for the 4f-electrons. The calculated density of states, total energies, Fermi surface, and magneto-optical properties are in better agreement with experiment than those obtained with the standard local density technique. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50010. INST PHYS MET,SVERDLOVSK,RUSSIA. RI Solovyev, Igor/B-1320-2010; Anisimov, Vladimir/K-1235-2013; Lichtenstein, Alexander/K-8730-2012 OI Solovyev, Igor/0000-0002-2010-9877; Anisimov, Vladimir/0000-0002-1087-1956; Lichtenstein, Alexander/0000-0003-0152-7122 NR 24 TC 118 Z9 118 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD NOV PY 1995 VL 56 IS 11 BP 1521 EP 1524 DI 10.1016/0022-3697(95)00122-0 PG 4 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA RW502 UT WOS:A1995RW50200006 ER PT J AU JONES, ED KLEM, JF LYO, SK AF JONES, ED KLEM, JF LYO, SK TI MAGNETOOPTICAL STUDIES OF COMPOUND SEMICONDUCTORS SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT 1994 Conference on Magneto-optic Materials CY JUN 16-18, 1994 CL LOS ALAMOS, NM DE QUANTUM WELLS; SEMICONDUCTORS; ELECTRONIC STRUCTURE; PHOTOLUMINESCENCE ID QUANTUM WELLS AB A simultaneous determination of both the conduction and valence-band dispersion curves (and masses) from a single compound semiconductor quantum-well structure using magnetoluminescence is discussed. Data from InGaAs/GaAs strained-single-quantum wells and GaAs/AlGaAs lattice matched quantum wells are presented. The conduction bands are found to be parabolic for densities approaching 1 x 10(12) cm(-2). However, the valence bands are highly nonparabolic and strongly affected by heavy-hole light-hole mixing. RP JONES, ED (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 11 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD NOV PY 1995 VL 56 IS 11 BP 1525 EP 1528 DI 10.1016/0022-3697(95)00123-9 PG 4 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA RW502 UT WOS:A1995RW50200007 ER PT J AU MYCEK, MA SIEGNER, U GLUTSCH, S AF MYCEK, MA SIEGNER, U GLUTSCH, S TI ULTRAFAST SPECTROSCOPY OF GAAS UNDER A MAGNETIC-FIELD - COULOMB CORRELATED MAGNETOEXCITONS IN THE 3D TO 1D TRANSITION SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS LA English DT Article; Proceedings Paper CT 1994 Conference on Magneto-optic Materials CY JUN 16-18, 1994 CL LOS ALAMOS, NM DE SEMICONDUCTORS; OPTICAL PROPERTIES; MAGNETIC PROPERTIES ID FREE-INDUCTION DECAY; QUANTUM-WELLS; EXCITONS; LIGHT AB Using transient four-wave mixing spectroscopy, we study the ultrafast nonlinear optical response of magnetoexcitons in GaAs at 1.6 K. By spectrally and temporally resolving the coherent emission, we measure the magnetic field dependence of Coulomb interactions between magnetoexcitons. Contrary to experiments performed in quantum wells, these interactions persist for field strengths up to 10 T. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP MYCEK, MA (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,MS 2-300,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 13 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 0022-3697 J9 J PHYS CHEM SOLIDS JI J. Phys. Chem. Solids PD NOV PY 1995 VL 56 IS 11 BP 1543 EP 1547 DI 10.1016/0022-3697(95)00126-3 PG 5 WC Chemistry, Multidisciplinary; Physics, Condensed Matter SC Chemistry; Physics GA RW502 UT WOS:A1995RW50200010 ER PT J AU PELACCIO, DG ELGENK, MS BUTT, DP AF PELACCIO, DG ELGENK, MS BUTT, DP TI HYDROGEN CORROSION CONSIDERATIONS OF CARBIDE FUELS FOR NUCLEAR THERMAL PROPULSION APPLICATIONS SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB At reactor operation conditions of interest for nuclear thermal propulsion (NTP), graphite- and carbide-based fuel materials have been known to exhibit a number of life-limiting phenomena, These include the formation of liquid, loss by vaporization, creep and corresponding gas flow restrictions, local corrosion, and structure degradation due to excessive mechanical and/or thermal loading. In addition, the irradiation environment can cause a substantial change in the local physical material properties, which can produce high thermal stresses and corresponding stress fracture (cracking), Time-temperature history and cyclic operation of the nuclear reactor can accelerate some of these processes. Based on results of a review of open literature, available in the U.S., a number of major competing interrelated physical mechanisms were identified that affect hydrogen corrosion of carbide fuel materials. This article identifies and discusses in detail these mechanisms associated with the corrosion of carbide-based materials when exposed to hot hydrogen now at conditions typical of NTP reactors. From the understanding of this complex phenomena, modeling requirements are then identified and discussed. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP PELACCIO, DG (reprint author), UNIV NEW MEXICO,INST SPACE & NUCL POWER STUDIES,DEPT CHEM & NUCL ENGN,ALBUQUERQUE,NM 87131, USA. RI Butt, Darryl/B-7480-2008 OI Butt, Darryl/0000-0003-4501-8864 NR 34 TC 3 Z9 3 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 NOV-DEC PY 1995 VL 11 IS 6 BP 1338 EP 1348 DI 10.2514/3.23977 PG 11 WC Engineering, Aerospace SC Engineering GA TF316 UT WOS:A1995TF31600032 ER PT J AU WILSON, BG LIBERMAN, DA SPRINGER, PT AF WILSON, BG LIBERMAN, DA SPRINGER, PT TI A DEFICIENCY OF LOCAL-DENSITY FUNCTIONALS FOR THE CALCULATION OF SELF-CONSISTENT-FIELD ATOMIC DATA IN PLASMAS SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER LA English DT Article ID EXCHANGE-ENERGY DENSITY; FINITE TEMPERATURES; GRADIENT EXPANSION; SHELL ATOMS; APPROXIMATION; OPACITY; POTENTIALS; PROGRAM; MODEL; IONS AB In generating the atomic data base used in computing opacities of hot dense plasmas the local density functional approximation (LDA) is often employed. One advantage of the LDA is that the configuration average energy of a large number of ionization states and excited configurations can be computed compactly using a multi-variate Taylor series expansion in occupation numbers. The pitfalls of employing a local density functional and its impact on the quality of the Taylor series approximation are discussed. The consequences of modeling opacities with a LDA are illustrated by comparisons with experiment. A method for obviating the problems inherent in the LDA is presented. RP LAWRENCE LIVERMORE NATL LAB, MAIL STOP L-59, POB 808, LIVERMORE, CA 94550 USA. NR 76 TC 12 Z9 12 U1 1 U2 4 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 NOV PY 1995 VL 54 IS 5 BP 857 EP 878 DI 10.1016/0022-4073(95)00104-S PG 22 WC Optics; Spectroscopy SC Optics; Spectroscopy GA TE912 UT WOS:A1995TE91200010 ER PT J AU Hoppe, EW Campbell, JA Stromatt, RW AF Hoppe, EW Campbell, JA Stromatt, RW TI Development and validation of a method for removal of normal paraffin hydrocarbon in radioactive waste samples prior to analysis of semivolatile components SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article AB A method has been developed at Pacific Northwest Laboratory (PNL) to remove normal paraffin hydrocarbon (NPH) from radioactive waste samples prior to gas chromotography/mass spectrometry analysis of semivolatile components. The effectiveness of the cleanup procedure was demonstrated for all the EPA semivolatile target list compounds. Blanks and spiked actual waste samples were utilized in the development and validation study, Approximately 95% of the NPH was removed from the single-shell tank samples. The recoveries were good for most of the target compounds. Results were compared with those obtained by utilizing EPA method 3630. The recoveries were much better for the PNL-developed method. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 3 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 NOV PY 1995 VL 198 IS 1 BP 89 EP 111 DI 10.1007/BF02038248 PG 23 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA TL238 UT WOS:A1995TL23800009 ER PT J AU Nevissi, AE Strebin, RS AF Nevissi, AE Strebin, RS TI Automated radiochemical procedure for plutonium and americium measurement SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES LA English DT Article; Proceedings Paper CT 5th International Conference on Low-Level Measurements of Actinides and Long-Lived Radionuclides in Biological and Environmental Samples CY JUL 10-15, 1994 CL AOMORI, JAPAN SP US DOE, Sci & Technol Agcy, Japan, Minist Int Trade & Ind, Agcy Nat Resources & Energy, Japan, Aomori Prefectural Govt, Japan ID ACTINIDES AB A radiochemical separation method for plutonium and americium from aqueous medium has been developed using a pre-packed resin column, a peristaltic pump, and the necessary tubing and valves for flow injection technique. All the radioanalytical operations were conducted in-line. Samples made of plutonium and americium tracers in water were analyzed by this technique and counted by alpha spectroscopy. The results show that plutonium and americium can be measured simultaneously using this technique. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP Nevissi, AE (reprint author), UNIV WASHINGTON, WH-10, SEATTLE, WA 98195 USA. NR 6 TC 3 Z9 3 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 AR JI J. Radioanal. Nucl. Chem.-Artic. PD NOV PY 1995 VL 197 IS 2 BP 211 EP 218 DI 10.1007/BF02036000 PG 8 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA TL236 UT WOS:A1995TL23600001 ER PT J AU Pacheco, JE Ralph, ME Chavez, JM AF Pacheco, JE Ralph, ME Chavez, JM TI Investigation of cold filling receiver panels and piping in molten-nitrate-salt central-receiver solar power plants SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Cold filling refers to flowering a fluid through piping or tubes that are at temperatures below the fluid's freezing point. Since the piping and areas of the receiver in a molten-nitrate salt central-receiver solar power plant must be electrically heated to maintain their temperatures above the nitrate salt freezing point (430 degrees F, 221 degrees C), considerable energy could be used to maintain such temperatures during nightly shutdown and bad weather Experiments and analyses have been conducted to investigate cold filling receiver panels and piping as a way of reducing parasitic electrical power consumption and increasing the availability of the plant. The two major concerns with cold filling are (1) how far can the molten salt penetrate cold piping before freezing closed, and (2) what thermal stresses develop during the associated thermal shock. Cold fill experiments were conducted by flowing molten salt at 550 degrees F (288 degrees C) through cold panels, manifolds, and piping to determine the feasibility of cold filling the receiver and piping. The transient thermal responses were measured and heat transfer coefficients were calculated from the data. Nondimensional analysis is presented which quantifies the thermal stresses in a pipe or tube undergoing thermal shock. In addition, penetration distances were calculated to determine the distance salt could flow in cold pipes prior to freezing closed. C1 SANDIA NATL LABS,TEST DEPT,ALBUQUERQUE,NM 87185. RP Pacheco, JE (reprint author), SANDIA NATL LABS,SOLAR THERMAL TECHNOL DEPT,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 8 TC 10 Z9 10 U1 1 U2 9 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD NOV PY 1995 VL 117 IS 4 BP 282 EP 289 DI 10.1115/1.2847839 PG 8 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA TT212 UT WOS:A1995TT21200003 ER PT J AU Stovall, TK Tomlinson, JJ AF Stovall, TK Tomlinson, JJ TI What are the potential benefits of including latent storage in common wallboard? SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Previous work has shown that wallboard can be successfully manufactured to contain rip to 30 percent phase-change material (PCM), or wax, thus enabling this common building material to serve as a thermal energy storage device. The PCM wallboard was analyzed for passive solar applications and found to save energy with a reasonable payback time period of five years. Further evaluations of the wallboard are reported in this paper this analysis looks at potential applications of PCM wallboard as a lend management device and as a comfort enhancer. Results show that the wallboard is ineffective in modifying the comfort level but can provide significant lend management relief. In some applications the lend management strategy also serves to save a small amount of energy, in others there is a small energy penalty. RP Stovall, TK (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 10 TC 58 Z9 62 U1 1 U2 3 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD NOV PY 1995 VL 117 IS 4 BP 318 EP 325 DI 10.1115/1.2847868 PG 8 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA TT212 UT WOS:A1995TT21200009 ER PT J AU Perez, R Seals, R Anderson, J Menicucci, D AF Perez, R Seals, R Anderson, J Menicucci, D TI Calculating solar radiation received by tubular collectors SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Tubular absorbers installed inside evacuated tubes represent an increasingly common design for low-temperature solar col lectors. Much work has been done on the subject of solar radiation received by flat-plate collectors; much less has been done for tubular collectors. In this paper we present nn algorithm to estimate irradiance impinging on tubular arrays. Key examples are provided to illustrate the difference of energy collected between par-plate and tubular collectors. C1 SANDIA NATL LABS,LIVERMORE,CA 94550. RP Perez, R (reprint author), SUNY ALBANY,ATMOSPHER SCI RES CTR,ALBANY,NY 12222, USA. NR 8 TC 9 Z9 10 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD NOV PY 1995 VL 117 IS 4 BP 341 EP 344 DI 10.1115/1.2847893 PG 4 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA TT212 UT WOS:A1995TT21200013 ER PT J AU Culpepper, M Garrett, H Shannon, M AF Culpepper, M Garrett, H Shannon, M TI Estimates of the Clementine interstage adapter satellite tumble rate SO JOURNAL OF SPACECRAFT AND ROCKETS LA English DT Note C1 CALTECH,JET PROP LAB,TECH STAFF,PASADENA,CA 91109. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP Culpepper, M (reprint author), USAF,PHILLIPS LAB,TECH STAFF,KIRTLAND AFB,NM 87117, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0022-4650 J9 J SPACECRAFT ROCKETS JI J. Spacecr. Rockets PD NOV-DEC PY 1995 VL 32 IS 6 BP 1077 EP 1078 DI 10.2514/3.26734 PG 2 WC Engineering, Aerospace SC Engineering GA TK774 UT WOS:A1995TK77400025 ER PT J AU Li, H Lawson, CL AF Li, H Lawson, CL TI Crystallization and preliminary X-ray analysis of Borrelia burgdorferi outer surface protein A (OspA) complexed with a murine monoclonal antibody fab fragment SO JOURNAL OF STRUCTURAL BIOLOGY LA English DT Article ID BINDING DOMAINS; CRYSTALS; MICE AB The Borrelia burgdorferi outer surface lipoprotein OspA is a current focus for vaccine development to prevent Lyme disease infection. A soluble, recombinant form of the protein lacking the amino-terminal lipid membrane anchor was cocrystallized with the Fab fragment of an agglutinating mouse monoclonal antibody. The crystals belong to space group P2(1)2(1)2(1), with a = 90.0 Angstrom, b = 91.9 Angstrom, and c = 102.9 Angstrom and they were found to diffract to a maximum resolution of 2.8 Angstrom using synchrotron radiation. (C) 1995 Academic Press, Inc. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 20 TC 11 Z9 11 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 1047-8477 J9 J STRUCT BIOL JI J. Struct. Biol. PD NOV-DEC PY 1995 VL 115 IS 3 BP 335 EP 337 DI 10.1006/jsbi.1995.1058 PG 3 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA TM548 UT WOS:A1995TM54800013 PM 8573475 ER PT J AU Afek, Y Greenberg, DS Merrit, M Taubenfeld, G AF Afek, Y Greenberg, DS Merrit, M Taubenfeld, G TI Computing with faulty shared objects SO JOURNAL OF THE ACM LA English DT Article DE algorithms; fault-tolerance; shared memory; synchronization; atomic operations ID CONSENSUS; SYSTEMS; MEMORY; IMPOSSIBILITY AB This paper investigates the effects of the failure of shared objects on distributed systems. First the notion of a faulty shared object is introduced. Then upper and lower bounds on the space complexity of implementing reliable shared objects are provided. Shared object failures are modeled as instantaneous and arbitrary changes to the state of the object. Several constructions of nonfaulty wait-free shared objects from a set of shared objects, some of which may suffer any number of faults, are presented. Three of these constructions are: (1) A reliable atomic read/write register from 20f + 8 atomic read/write registers f of which may be faulty, (2) a reliable test & set register for n processes from n + 10 primitive test & set registers, one of which may be faulty, and 3n + 13 reliable atomic registers, and (3) a reliable consensus object from 2f + 1 read-modify-write registers when f of these may be faulty. Using these constructions a universal construction of any linearizable shared object from a set of either n-processor consensus objects or n-processor read-modify-write registers, some of which may be faulty, is presented. C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. SANDIA NATL LABS, LIVERMORE, CA 94550 USA. RP Afek, Y (reprint author), TEL AVIV UNIV, IL-69978 TEL AVIV, ISRAEL. NR 45 TC 18 Z9 18 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA SN 0004-5411 EI 1557-735X J9 J ACM JI J. ACM PD NOV PY 1995 VL 42 IS 6 BP 1231 EP 1274 DI 10.1145/227683.227688 PG 44 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA TY166 UT WOS:A1995TY16600005 ER PT J AU OLSON, JR SWIFT, GW AF OLSON, JR SWIFT, GW TI A LOADED THERMOACOUSTIC ENGINE SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB Measurements and analysis of the performance of a thermoacoustic engine driving a dissipative load are presented. The effect of the load can be explained qualitatively using a simple low-amplitude approximation and quantitatively by invoking a more accurate low-amplitude numerical solution. The heater power Q and hot-end temperature T-H are found to be simple functions of the load impedance and the unloaded values of Q and T-H. (C) 1995 Acoustical Society of America. RP OLSON, JR (reprint author), LOS ALAMOS NATL LAB,CONDENSED MATTER & THERMAL PHYS GRP,LOS ALAMOS,NM 87545, USA. NR 14 TC 14 Z9 24 U1 4 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD NOV PY 1995 VL 98 IS 5 BP 2690 EP 2693 DI 10.1121/1.413233 PN 1 PG 4 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA TB921 UT WOS:A1995TB92100032 ER PT J AU BONIN, MP FLOWER, WL RENZI, RF PENG, LW AF BONIN, MP FLOWER, WL RENZI, RF PENG, LW TI SIZE AND CONCENTRATION MEASUREMENTS OF PARTICLES PRODUCED IN COMMERCIAL CHROMIUM PLATING PROCESSES SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Article AB Optical measurements of particle size and concentration were made at the chromium plating tank and exhaust system at a commercial hexavalent chromium plating facility. Particles were examined at three locations in the exhaust system: 1) directly at the hexavalent chromium plating bath surface, 2) at the exit of a cyclone separator located in the exhaust system approximately three to four meters downstream of the bath, and 3) in the exhaust stack, downstream of the induced draft fan and all abatement devices. Particle diameters at the bath surface ranged from 0.3 to 25 mu m. Downstream of the cyclone exit and mesh pad filters, particle top sizes were approximately 5 and 0.7 mm, respectively. On a mass basis, the collection efficiency of all abatement devices was 99.997%. Assuming that droplets in the flow consist primarily of water and chromium, correcting the total particle mass flow against water content gives a chromium emission rate of 64,000 mu g/hr, which compares favorably with a value of 77,000 mu g/hr measured with EPA methods. This initial agreement, which should be validated through additional measurements over a broad range of flow conditions, raises the possibility of continuous monitoring for chromium metal emissions using particle size/mass as a surrogate. C1 SANDIA NATL LABS,LIVERMORE,CA. NR 6 TC 10 Z9 10 U1 0 U2 0 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA PO BOX 2861, PITTSBURGH, PA 15230 SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD NOV PY 1995 VL 45 IS 11 BP 902 EP 907 PG 6 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA TD643 UT WOS:A1995TD64300009 ER PT J AU DING, JL LIU, KC BRINKMAN, CR LIN, SB AF DING, JL LIU, KC BRINKMAN, CR LIN, SB TI DEVELOPMENT OF A HIGH-TEMPERATURE DEFORMATION AND LIFE PREDICTION MODEL FOR AN ADVANCED SILICON-NITRIDE CERAMIC SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID DAMAGE-ENHANCED CREEP; MECHANICS; BEHAVIOR; FRACTURE; CARBIDE; PHASE AB A new deformation model inclusive of life prediction capability is introduced for describing general thermal mechanical loading behavior of an advanced structural ceramic at high temperatures, The model is formulated using the state variable approach, Two internal state variables, namely, ''hardening'' and ''damage'' variables, are employed to characterize the current state of the material. The model consists of three rate equations: a flow rule describes the creep rate as a function of the hardening state variable, applied stress, and temperature; and two evolution rules describe the rate changes of the two internal variables, Material history is accounted for through the evolution of the internal variables, The model was characterized and evaluated based on experimental creep and creep rupture data of an advanced silicon nitride ceramic tested under constant and stepwise-varied loading conditions, A unique strength of the model, not empowered in conventional approaches such as the Norton power-law creep and Monkman-Grant creep rupture relations, is demonstrated with the aid of the hardening variable, which enables the effect of thermal annealing on subsequent creep and creep rupture behavior to be delineated. C1 WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164. RP DING, JL (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 31 TC 5 Z9 5 U1 0 U2 1 PU AMER CERAMIC SOC 735 CERAMIC PLACE PI WESTERVILLE PA PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD NOV PY 1995 VL 78 IS 11 BP 3057 EP 3066 DI 10.1111/j.1151-2916.1995.tb09083.x PG 10 WC Materials Science, Ceramics SC Materials Science GA TD715 UT WOS:A1995TD71500028 ER PT J AU ZHOU, DS MITCHELL, TE AF ZHOU, DS MITCHELL, TE TI DISLOCATIONS IN AS-GROWN CVD ALPHA-SILICON NITRIDE SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Note AB CVD alpha-Si3N4 has been studied by transmission electron microscopy, and dislocations are found to occur in as-grown material. Two-beam contrast analysis has been used to determine that these dislocations have Burgers vectors of [0001], 1/3[<2(11)over bar0>], and 1/3[<2(11)over bar3>], Because of their smaller Burgers vector, [0001] dislocations are dominant, Their dissociation into half partials has been observed. C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. NR 13 TC 5 Z9 5 U1 0 U2 2 PU AMER CERAMIC SOC 735 CERAMIC PLACE PI WESTERVILLE PA PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD NOV PY 1995 VL 78 IS 11 BP 3133 EP 3136 DI 10.1111/j.1151-2916.1995.tb09097.x PG 4 WC Materials Science, Ceramics SC Materials Science GA TD715 UT WOS:A1995TD71500042 ER PT J AU PIMIENTABARRIOS, E NOBEL, PS AF PIMIENTABARRIOS, E NOBEL, PS TI REPRODUCTIVE CHARACTERISTICS OF PITAYO (STENOCEREUS-QUERETAROENSIS) AND THEIR RELATIONSHIPS WITH SOLUBLE SUGARS AND IRRIGATION SO JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE LA English DT Article DE STENOCEREUS; FRUIT QUALITY; PHENOLOGY; REPRODUCTIVE DEMOGRAPHY; SEED GERMINATION; SEED QUALITY; VEGETATIVE GROWTH ID LEAVES AB Flower and fruit production by the columnar cactus, Stenocereus queretaroensis (Weber) Buxbaum, occurred during the dry season in the late winter and spring, and the relatively small annual stem extension occurred primarily during the fall, Thus, reproductive growth does not directly compete with vegetative growth for resources such as reducing sugars, which increased during the wet summer season, a period when total sugars were decreasing, Stem extension, reproductive demography, fruit quality, seed size, and seed quality were not influenced by irrigation, Final fruit size and seed germination, however, were enhanced by applying water. The times from flower bud differentiation to flower opening and from anthesis to fruit ripening were relatively short and unaffected by irrigation. C1 UNIV CALIF LOS ANGELES,DEPT BIOL,LOS ANGELES,CA 90024. UNIV GUADALAJARA,CTR CIENCIAS BIOL & AGROPECUARIAS,DIV CIENCIAS BIOL,ZAPOPAN,JALISCO,MEXICO. UNIV CALIF LOS ANGELES,DOE LAB,LOS ANGELES,CA 90024. NR 27 TC 13 Z9 16 U1 0 U2 1 PU AMER SOC HORTICULTURAL SCIENCE PI ALEXANDRIA PA 701 NORTH SAINT ASAPH STREET, ALEXANDRIA, VA 22314-1998 SN 0003-1062 J9 J AM SOC HORTIC SCI JI J. Am. Soc. Hortic. Sci. PD NOV PY 1995 VL 120 IS 6 BP 1082 EP 1086 PG 5 WC Horticulture SC Agriculture GA TC365 UT WOS:A1995TC36500034 ER PT J AU MCMAHON, JM DOOKERAN, NN TODD, PJ AF MCMAHON, JM DOOKERAN, NN TODD, PJ TI ORGANIC ION IMAGING BEYOND THE LIMIT OF STATIC SECONDARY-ION MASS-SPECTROMETRY SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID BIOMOLECULES; EMISSION AB Secondary ion mass spectra and images were obtained from spikes of choline chloride, acetylcholine chloride, and methylphenylpyridinium iodide deposited onto specimens of porcine brain tissue. Samples were subsequently subjected to a dose of 10-keV Cs+ sufficient to suppress secondary ion emission characteristic of the targeted analytes. Following ablation of the samples by massive,glycerol clusters generated by electrohydrodynamic emission, secondary ion mass spectra and images could be obtained that reflected the identity and location of the spiked analytes. The absolute intensity of secondary ion emission that followed ablation was found to be between 30 and 100% of the intensity obtained prior to exposure to the high dose of Cs+. Not all chemical noise is removed by ablation, however, so that the signal-to-noise ratios after ablation correspond to between 10 and 85% of their values observed under conditions of low primary ion dose. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 18 TC 23 Z9 23 U1 0 U2 3 PU ELSEVIER SCIENCE PUBL CO INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD NOV PY 1995 VL 6 IS 11 BP 1047 EP 1058 DI 10.1016/1044-0305(95)00526-9 PG 12 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA TE362 UT WOS:A1995TE36200009 PM 24214051 ER PT J AU FENG, JR HOUK, LL JOHNSON, DC LOWERY, SN CAREY, JJ AF FENG, JR HOUK, LL JOHNSON, DC LOWERY, SN CAREY, JJ TI ELECTROCATALYSIS OF ANODIC OXYGEN-TRANSFER REACTIONS - THE ELECTROCHEMICAL INCINERATION OF BENZOQUINONE SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID WASTE-WATER TREATMENT; FENTON REAGENT; SNO2 ANODES; OXIDATION; PHENOL; ELECTRODES; BENZENE AB The electrochemical performance of several anode materials is compared for the electrochemical incineration of p-benzoquinone in acetate buffer media (pH 5). The chemical oxygen demand (GOD) estimated for benzoquinone by titration with standard permanganate solution can be decreased to virtually zero by electrolysis at electrodes comprised of Fe(III)-doped beta-PbO2 films on Ti substrates. Carbon dioxide is a product of the electrochemical process; however, the possibility of other volatile products cannot be dismissed. Addition of solid benzoyuinone to acetate media is followed by slow formation of a brownish black color that is concluded to result from one or more humic compounds produced by condensation of benzoquinone; however, it cannot be concluded whether the condensation reaction is a necessary prerequisite to successful electrochemical incineration of benzoquinone. Optimal operating conditions suggested for electrochemical incineration of benzoquinone in acetate buffer include heating of the anode (e.g., 60 degrees C) to increase the rate of anodic discharge of H2O and, thereby, decrease the anodic overpotential. Evidence also is presented that the rate of electrochemical incineration is enhanced slightly by the addition of a traces of Fe(III) with reduction of dioxggen (O-2) to hydrogen peroxide (H2O2) at a cooled stainless steel cathode (e.g., 15 degrees C) in an undivided cell. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. EASTMAN KODAK CO,RES LABS,CORP HLTH & ENVIRONM LABS,ENVIRONM SCI SECT,ROCHESTER,NY 14650. RP FENG, JR (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011, USA. NR 27 TC 102 Z9 113 U1 0 U2 10 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD NOV PY 1995 VL 142 IS 11 BP 3626 EP 3632 DI 10.1149/1.2048389 PG 7 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA TD933 UT WOS:A1995TD93300010 ER PT J AU RUSH, B NEWMAN, J AF RUSH, B NEWMAN, J TI PERIODIC BEHAVIOR IN THE IRON SULFURIC-ACID SYSTEM SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID CURRENT OSCILLATIONS; SALT FILMS; MATHEMATICAL-MODEL; DISSOLUTION AB Potentiostatic current oscillations observed during the anodic dissolution of an iron electrode in a sulfuric acid electrolyte are considered. This behavior has been experimentally characterized with respect to its potential dependence. A new mechanism has been developed that is consistent with observed behaviors and trends. This mechanism combines previously developed ideas concerning periodic behavior and passivation of iron with a new interpretation of precipitated salt-film behavior. The salt film is taken to be nonporous, serving as both a necessary precursor to oxide passivation as well as an effective passivating species itself. The mechanism is well corroborated by results from a mathematical model which also highlights the necessity of salt-film precipitation for the development of periodic behavior. Additionally, the issue of coherence is explicitly considered. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP RUSH, B (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 16 TC 55 Z9 55 U1 0 U2 9 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD NOV PY 1995 VL 142 IS 11 BP 3770 EP 3779 DI 10.1149/1.2048412 PG 10 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA TD933 UT WOS:A1995TD93300033 ER PT J AU BUCHHEIT, RG AF BUCHHEIT, RG TI A COMPILATION OF CORROSION POTENTIALS REPORTED FOR INTERMETALLIC PHASES IN ALUMINUM-ALLOYS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Review ID BEHAVIOR; COMPOUND; CU AB A compilation of corrosion potentials reported for Al-based intermetallic compounds is presented. The range of corrosion potentials for dilute aluminum binary alloys is also given. This compilation is intended to serve as an aid in establishing galvanic relationships among discrete microstructural elements in aluminum alloys. This compilation is based primarily on data reported in the corrosion literature with a focus on corrosion potentials for intermetallic compound particles found in commercial alloys. RP BUCHHEIT, RG (reprint author), SANDIA NATL LABS,DEPT MECH MET & CORROS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 26 TC 207 Z9 214 U1 2 U2 42 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD NOV PY 1995 VL 142 IS 11 BP 3994 EP 3996 DI 10.1149/1.2048447 PG 3 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA TD933 UT WOS:A1995TD93300068 ER PT J AU SMITH, AV ALFORD, WJ RAYMOND, TD BOWERS, MS AF SMITH, AV ALFORD, WJ RAYMOND, TD BOWERS, MS TI COMPARISON OF A NUMERICAL-MODEL WITH MEASURED PERFORMANCE OF A SEEDED, NANOSECOND KTP OPTICAL PARAMETRIC OSCILLATOR SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID 2ND-HARMONIC GENERATION; MU-M; BETA-BAB2O4; LIB3O5; LASER AB We have constructed a numerical model of seeded optical parametric oscillators that is appropriate for nanosecond or longer pulsed operation. We have also experimentally characterized the performance of a KTP ring optical parametric oscillator. We present a description of the model and show that its predictions agree well with the observed oscillator performance. We compare spatial beam quality, spectra, efficiency, and full-beam and spatially resolved temporal profiles. Backconversion of signal and idler light to pump is found to affect all the aspects of performance. (C) 1995 Optical Society of America C1 ACULIGHT CORP,BELLEVUE,WA 98005. RP SMITH, AV (reprint author), SANDIA NATL LABS,DEPT LASER OPT & REMOTE SENSING,ALBUQUERQUE,NM 87185, USA. NR 35 TC 116 Z9 122 U1 0 U2 17 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD NOV PY 1995 VL 12 IS 11 BP 2253 EP 2267 DI 10.1364/JOSAB.12.002253 PG 15 WC Optics SC Optics GA TD956 UT WOS:A1995TD95600029 ER PT J AU KRAMER, CF THODE, HC KAHN, CJ BARANCIK, JI AF KRAMER, CF THODE, HC KAHN, CJ BARANCIK, JI TI ADEQUACY OF HOSPITAL DISCHARGE DATA FOR DETERMINING TRAUMA MORBIDITY PATTERNS SO JOURNAL OF TRAUMA-INJURY INFECTION AND CRITICAL CARE LA English DT Article; Proceedings Paper CT 8th Scientific Assembly of the Eastern-Association-for-the-Surgery-of-Trauma CY JAN 11-14, 1995 CL SANIBEL, FL SP E Assoc Surg Trauma DE TRAUMA; SURVEILLANCE; MORBIDITY; DISCHARGE DATA ID INJURY; ISSUES AB To determine the adequacy of hospital discharge data for describing the nature and severity of multiple trauma, injury data coded from full hospital records were compared with injury data coded from discharge summaries for 83 plane crash survivors admitted to 14 different hospitals. Full hospital records indicated that 33% sustained intracranial, 39% thoracic, and 27% abdominal/pelvic injuries, Thirty-five percent had spinal fractures, 40% upper limb fractures, and 70% lower limb fractures, Discharge summary data missed 52% of the intracranial injuries, 28% of the thoracic injuries, and 30% of the spinal fractures, yet only missed 5% of the lower limb and 15% of the skull, pelvic, acid upper limb fractures. These differences point to concerns regarding the use of discharge data for determining the nature, severity, and sequelae of injuries, The observed underreporting of neurological injury suggests a need to re-evaluate discharge data systems for measuring brain and spinal cord injury patterns, particularly given the increasing reliance on these systems for health policy and programmatic decision making. C1 SUNY ALBANY,SCH PUBL HLTH,ALBANY,NY. SUNY STONY BROOK,HLTH SCI CTR,STONY BROOK,NY 11794. RP KRAMER, CF (reprint author), BROOKHAVEN NATL LAB,DEPT MED,PROGRAM EPIDEMIOL,UPTON,NY 11973, USA. NR 31 TC 9 Z9 9 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 1079-6061 J9 J TRAUMA JI J. Trauma-Injury Inf. Crit. Care PD NOV PY 1995 VL 39 IS 5 BP 935 EP 940 DI 10.1097/00005373-199511000-00019 PG 6 WC Critical Care Medicine; Surgery SC General & Internal Medicine; Surgery GA TG664 UT WOS:A1995TG66400019 PM 7474011 ER PT J AU PRIETO, P KIRBY, RE AF PRIETO, P KIRBY, RE TI X-RAY PHOTOELECTRON-SPECTROSCOPY STUDY OF THE DIFFERENCE BETWEEN REACTIVELY EVAPORATED AND DIRECT SPUTTER-DEPOSITED TIN FILMS AND THEIR OXIDATION PROPERTIES SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID ANGLE-RESOLVED-PHOTOEMISSION; ENERGY-LOSS SPECTROSCOPY; AUGER-ELECTRON SPECTROSCOPY; TITANIUM NITRIDE; THIN-FILMS; RUTHERFORD BACKSCATTERING; SUBSTOICHIOMETRIC TIN; BAND STRUCTURE; 100 SURFACE; XPS AB X-ray photoelectron spectroscopy (XPS) is used to study carefully prepared oxide-free titanium nitride (TiN) films of nearly identical stoichiometry, grown by direct sputtering and reactive evaporation. The line shapes and peak positions of the Ti 2p and N 1s transitions are dependent upon the deposition method. The XPS results showed that oxynitrides are present following exposure of either type of film to dry oxygen; however, reactively evaporated films have a considerably higher oxidation rate. Differences in valence band and electron energy loss spectroscopy (EELS) spectra are correlated with the changes observed in the core levels. The EELS spectra detected the presence of a low energy loss, which is correlated with the TiN electron density of states closest to the Fermi level. The secondary electron emission yields for reactively evaporated TiN were also measured before and after dry oxygen and air exposure, and after heating. The maximum yields are about 10% lower for reactively evaporated films than for similarly treated previously measured sputter-deposited layers. (C) 1995 American Vacuum Society. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. NR 44 TC 99 Z9 100 U1 7 U2 28 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD NOV-DEC PY 1995 VL 13 IS 6 BP 2819 EP 2826 DI 10.1116/1.579711 PG 8 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TF111 UT WOS:A1995TF11100028 ER PT J AU MOUTINHO, HR HASOON, FS ABULFOTUH, F KAZMERSKI, LL AF MOUTINHO, HR HASOON, FS ABULFOTUH, F KAZMERSKI, LL TI INVESTIGATION OF POLYCRYSTALLINE CDTE THIN-FILMS DEPOSITED BY PHYSICAL VAPOR-DEPOSITION, CLOSE-SPACED SUBLIMATION, AND SPUTTERING SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article; Proceedings Paper CT 41st National Symposium of the American-Vacuum-Society CY OCT 24-28, 1994 CL DENVER, CO SP Amer Vacuum Soc ID HETEROJUNCTION SOLAR-CELLS; SCIENCE; TOOL AB CdTe thin films, deposited on different substrate structures by physical vapor deposition, sputtering, and close-spaced sublimation, have been treated with CdCl2 at several temperatures. The morphology of the films has been studied by atomic force microscopy, and the observations were correlated to results obtained from x-ray diffraction, cathodoluminescence, and minority-carrier lifetime measurements. The samples treated at 400 degrees C resulted in the best device-quality films, independent of deposition method and underlying substrate structure. For the first time, a nanograin structure was observed in CdTe sputtered samples. (C) 1995 American Vacuum Society. RP MOUTINHO, HR (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 21 TC 84 Z9 86 U1 3 U2 13 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD NOV-DEC PY 1995 VL 13 IS 6 BP 2877 EP 2883 DI 10.1116/1.579607 PG 7 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TF111 UT WOS:A1995TF11100037 ER PT J AU MEEKS, E SHON, JW RA, Y JONES, P AF MEEKS, E SHON, JW RA, Y JONES, P TI EFFECTS OF ATOMIC CHLORINE WALL RECOMBINATION - COMPARISON OF A PLASMA CHEMISTRY MODEL WITH EXPERIMENT SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article; Proceedings Paper CT 41st National Symposium of the American-Vacuum-Society CY OCT 24-28, 1994 CL DENVER, CO SP Amer Vacuum Soc ID DENSITY AB Results from a plasma chemistry model provide predictions of spatially and temporally averaged plasma properties. Application of the model to chlorine-etch process conditions, typical of a high plasma-density transformer coupled plasma reactor, provides plasma composition dependence on reactor operating parameter such as power and pressure. Model results also show the dependence of species concentrations on the atomic-chlorine recombination rate at reactor walls. Comparison of model predictions to measured composition trends as determined by Langmuir probe, actinometry, and ion-energy analysis reveals a critical wall-recombination probability of about 0.1 for chlorine atoms on a chlorinated anodized-aluminum surface. Ar or above this critical value, the model reproduces the experimentally observed trends, while employing a recombination probability below this value results in predictions that are inconsistent with the data. The model determines gas-phase and surface-species compositions in plasma-etch reactors through the solution of species, mass. electron-energy, and surface-site conservation equations. The use of well mixed reactor approximations reduces the computational expense of detailed kinetics calculations and allows investigation into the dependence of plasma chemistry on uncertain kinetic parameters. The dominance of surface reaction rates in determining plasma properties is expected to be equally important in more complex two-dimensional inductively coupled plasma models due to the highly diffuse nature of these low-pressure reactors. (C) 1995 American Vacuum Society. C1 LAM RES CORP,FREMONT,CA 94538. RP MEEKS, E (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. NR 22 TC 34 Z9 34 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD NOV-DEC PY 1995 VL 13 IS 6 BP 2884 EP 2889 DI 10.1116/1.579608 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TF111 UT WOS:A1995TF11100038 ER PT J AU COLLINS, SM BROWN, DA OHANLON, JF CARLILE, RN AF COLLINS, SM BROWN, DA OHANLON, JF CARLILE, RN TI POSTPLASMA PARTICLE DYNAMICS IN A GASEOUS ELECTRONICS CONFERENCE RF REFERENCE CELL SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article; Proceedings Paper CT 41st National Symposium of the American-Vacuum-Society CY OCT 24-28, 1994 CL DENVER, CO SP Amer Vacuum Soc AB Particle contamination in plasma tools used for the manufacture of very large scale integrated semiconductor devices on silicon wafers is a major cause of yield loss. Understanding the dynamics of particle movement in the postplasma regime is important to explain the process of their transport to the wafer. The movement of particle contamination in a Gaseous Electronics Conference RF Reference Cell in the postplasma regime was investigated using a novel technique, Particle clouds were observed using laser light scattering together with an image intensifier and a monochromator, This technique allowed particle clouds of low density, that could not otherwise be detected, to be seen. Video analysis of the particles showed movement of the cloud front during the first second after the plasma was extinguished. Using the particle terminal velocity to estimate particle size, we estimate diameters of 0.11 mu m in argon and 0.05 mu m in krypton. The role of the thermophoretic force on particles during the postplasma was shown to be larger than gravitational forces and to dominate particle transport for small particles under the conditions investigated. A temperature gradient of 12 degrees C/cm was observed to move these particles away from a warm electrode as the plasma was extinguished and the particles were released from the electrostatic confinement farces generated by the plasma. (C) 1995 American Vacuum Societyy C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP COLLINS, SM (reprint author), UNIV ARIZONA,DEPT ELECT & COMP ENGN,TUCSON,AZ 85721, USA. NR 8 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD NOV-DEC PY 1995 VL 13 IS 6 BP 2950 EP 2953 DI 10.1116/1.579620 PG 4 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TF111 UT WOS:A1995TF11100049 ER PT J AU Vartuli, CB Pearton, SJ Abernathy, CR MacKenzie, JD Zolper, JC AF Vartuli, CB Pearton, SJ Abernathy, CR MacKenzie, JD Zolper, JC TI Implant isolation of InxAl1-xN and InxGa1-xN SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID GROWTH; LAYERS; INP AB N-type layers of InxAl1-xN and InxGa1-xN were implanted with multiple energy N+, F+, or O+ ions at doses in the range 5 X 10(12)-5 X 10(14) Cm-2, and subsequently annealed up to 900 degrees C. Increases in sheet resistance of up to factors of similar to 10(4) were achieved in In0.75Al0.25N after implantation at the higher doses, followed by annealing at 600-700 degrees C. The behavior for Ln(x)Ga(1-x)N followed the same trend, with somewhat lower increases in sheet resistance. The implantation creates deep acceptor states in the upper part of the band gap of both types of material, rather than at midgap, which is the optimum situation for implant isolation. (C) 1995 American Vacuum Society. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP Vartuli, CB (reprint author), UNIV FLORIDA,GAINESVILLE,FL 32611, USA. NR 24 TC 9 Z9 9 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2293 EP 2296 DI 10.1116/1.588065 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600027 ER PT J AU Saville, GF Platzman, PM Ku, LP AF Saville, GF Platzman, PM Ku, LP TI Magnetic funnels for projection electron lithography SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer AB Electrons moving in inhomogeneous magnetic fields, which are slowly varying, behave like beads on a string. Because of this a converging magnetic funnel (MF) can be used to reduce an electron image in a way which is physically very different from a conventional lens. We analyze and numerically simulate the trajectories of electrons in a realizable ME We show that such magnetic configurations are generally capable of projecting and reducing several cmi images with features in the 0.1 mu range. Distortions are <10(-6), there is good depth of focus (greater than or equal to 1 mu m), and spot sizes (less than or equal to 20 nm) are achievable. (C) 1995 American Vacuum Society. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP Saville, GF (reprint author), AT&T BELL LABS,MURRAY HILL,NJ 07974, USA. NR 7 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 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2424 EP 2427 DI 10.1116/1.588013 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600050 ER PT J AU Anderson, EH Boegli, V Muray, LP AF Anderson, EH Boegli, V Muray, LP TI Electron beam lithography digital pattern generator and electronics for generalized curvilinear structures SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer ID FABRICATION AB A vector scan pattern generator, optimized for smooth curvilinear as well as rectilinear primitive shapes, has been designed and constructed. The pattern generator uses high-speed hardware to implement a set of second-order, quadratic equations to drive digital to analog converters and high-speed array processors to calculate the coefficients for these equations. The digital pattern generator package contains the high-speed digital, analog, and high-resolution analog electronics. The initial lithography results confirm the operation of the system and stepping rates of 40 MHz have been achieved. (C) 1995 American Vacuum Society. RP Anderson, EH (reprint author), LAWRENCE BERKELEY LAB,MS 2-400,BERKELEY,CA 94720, USA. NR 4 TC 52 Z9 55 U1 2 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2529 EP 2534 DI 10.1116/1.588387 PG 6 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600072 ER PT J AU Leung, KN Herz, P Kunkel, WB Lee, Y Perkins, L Pickard, D Sarstedt, M Weber, M Williams, MD AF Leung, KN Herz, P Kunkel, WB Lee, Y Perkins, L Pickard, D Sarstedt, M Weber, M Williams, MD TI Multicusp sources for ion beam lithography applications SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer ID MAGNETIC FILTER AB Application of the multicusp source for ion projection lithography is described. It is shown that the Longitudinal energy spread of the positive ions at the extraction aperture can be reduced by employing a magnetic filter. The advantages of using volume-produced H- ions for ion beam lithography are also discussed. (C) 1995 American Vacuum Society. RP Leung, KN (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 7 TC 9 Z9 9 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2600 EP 2602 DI 10.1116/1.588032 PG 3 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600088 ER PT J AU Wendt, JR Vawter, GA Smith, RE Warren, ME AF Wendt, JR Vawter, GA Smith, RE Warren, ME TI Nanofabrication of subwavelength, binary, high-efficiency diffractive optical elements in GaAs SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer ID GRATINGS; HOLOGRAMS AB A single-etch-step process for the fabrication of high-efficiency diffractive optical elements is presented. The technique uses subwavelength surface relief structures to create a material with an effective index of refraction determined by the fill factor of the binary pattern. Fabrication is performed using electron beam lithography and reactive-ion-beam etching on bulk GaAs, but the process is applicable to any material for which well-controlled etches exist. In this work, we designed and fabricated a blazed transmission grating for operation at 975 nm. The blazed grating exhibits a diffraction efficiency into the first order of 85% of the transmitted power. (C) 1995 American Vacuum Society. RP Wendt, JR (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 13 TC 22 Z9 22 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2705 EP 2708 DI 10.1116/1.588248 PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600109 ER PT J AU Goldberg, KA Beguiristain, R Bokor, J Medecki, H Attwood, DT Jackson, K Tejnil, E Sommargren, GE AF Goldberg, KA Beguiristain, R Bokor, J Medecki, H Attwood, DT Jackson, K Tejnil, E Sommargren, GE TI Progress towards lambda/20 extreme ultraviolet interferometry SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer AB Diffraction-limited optical imaging systems for extreme ultraviolet (EUV) lithography require wave front aberrations to be limited to a fraction of the EUV wavelength. Surface figure metrology and wave front measurement at this level: of accuracy represent key challenges in the development of EUV lithography. We have constructed and operated a wave front measuring interferometer at 12-13 nm wavelength. This interferometer is being used to measure the aberrations in 0.1 numerical aperture Fresnel zone plate lenses. Factors limiting the resolution and accuracy of the interferometer were studied. Substantial progress toward lambda/20 wave front measurement accuracy has been made. (C) 1995 American Vacuum Society. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT NUCL ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT ELECT ENGN & COMP SCI,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,ADV MICROTECHNOL PROGRAM,LIVERMORE,CA 94550. RP Goldberg, KA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR XRAY OPT,BERKELEY,CA 94720, USA. RI Bokor, Jeffrey/A-2683-2011 NR 19 TC 13 Z9 13 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 2923 EP 2927 DI 10.1116/1.588280 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600156 ER PT J AU Nguyen, KB RayChaudhuri, AK Stulen, RH Krenz, K Fetter, LA Tennant, DM Windt, DL AF Nguyen, KB RayChaudhuri, AK Stulen, RH Krenz, K Fetter, LA Tennant, DM Windt, DL TI Printability of substrate and absorber defects on extreme ultraviolet lithographic masks SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer ID RAY PROJECTION LITHOGRAPHY; PHASE-SHIFTING MASKS; REFLECTION AB Extreme ultraviolet lithography (EUVL) in a candidate for high-volume production of integrated circuits with 0.1 mu m design rules. As a reduction imaging technique with robust mask substrates, EUVL reduces the mask contribution to the critical dimension (CD) error budget. However, the ability to manufacture EUVL mask blanks that are free of printable defects remains an important challenge. Electromagnetic simulations and imaging experiments have suggested that defects in the substrates and reflective coatings, in particular, may be highly printable and difficult to detect. A defect printability study using programmed defects was performed in order to determine the printing behavior of mask defects of different sizes and locations with respect to absorber features. Imaging was performed using a 10X Schwarzschild camera operating at 13.4 nm with a numerical aperture of 0.08, corresponding to a Rayleigh resolution of 0.1 mu m. This system has an effective exposure field of 0.4 mm diam. Measurements of the defect-induced linewidth variations of the printed resist lines were performed with scanning electron microscopy and atomic force microscopy. Results show that defects located on the substrate and overcoated by the reflective coating are more printable compared to defects of the same sizes located above the reflective coating. In addition, defects centered in the clear region of lines-and-space (L/S) pattern are more printable compared to those located at the line edge programmed defects located in L/S patterns that are larger than 1/3 of the linewidth caused greater than or equal to 10% CD variations, while defects that are less than or equal to 1/6 of the linewidth did not cause measurable CD variations. (C) 1995 American Vacuum Society. C1 AT&T BELL LABS,HOLMDEL,NJ 07733. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP Nguyen, KB (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. NR 31 TC 11 Z9 11 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 3082 EP 3088 DI 10.1116/1.588327 PG 7 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600188 ER PT J AU RayChaudhuri, AK Ng, W Cerrina, F Tan, Z Bjorkholm, J Tennant, D Spector, SJ AF RayChaudhuri, AK Ng, W Cerrina, F Tan, Z Bjorkholm, J Tennant, D Spector, SJ TI Alignment of a multilayer-coated imaging system using extreme ultraviolet Foucault and Ronchi interferometric testing SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article; Proceedings Paper CT 39th International Conference on Electron, Ion, and Photon Beam Technology and Nanofabrication (EIPBN) CY MAY 30-JUN 02, 1995 CL SCOTTSDALE, AZ SP Amer Vacuum Soc, IEEE, Electron Device Soc, Opt Soc Amer AB Multilayer-coated imaging systems for extreme ultraviolet (EUV) lithography at 13 nm represent a significant challenge for alignment and characterization. The standard practice of utilizing visible light interferometry fundamentally provides an incomplete picture since this technique fails to account for phase effects induced by the multilayer coating. Thus the development of optical techniques at the functional EUV wavelength is required. We present the development of two EUV optical tests based on Foucault and Ronchi techniques. These relatively simple techniques are extremely sensitive due to the factor of 50 reduction in wavelength. Both techniques were utilized to align a Mo-Si multilayer-coated Schwarzschild camera. By varying the illumination wavelength, phase shift effects due to the interplay of multilayer coating and incident angle were uniquely detected. (C) 1995 American Vacuum Society. C1 UNIV WISCONSIN,MAT SCI PROGRAM,MADISON,WI 53703. UNIV WISCONSIN,DEPT ELECT & COMP ENGN,MADISON,WI 53703. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. RP RayChaudhuri, AK (reprint author), SANDIA NATL LABS,DEPT MAT SCI & TECHNOL,LIVERMORE,CA 94551, USA. NR 14 TC 16 Z9 17 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD NOV-DEC PY 1995 VL 13 IS 6 BP 3089 EP 3093 DI 10.1116/1.588328 PG 5 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA TN816 UT WOS:A1995TN81600189 ER PT J AU TRKOLA, A POMALES, AB YUAN, H KORBER, B MADDON, PJ ALLAWAY, GP KATINGER, H BARBAS, CF BURTON, DR HO, DD MOORE, JP AF TRKOLA, A POMALES, AB YUAN, H KORBER, B MADDON, PJ ALLAWAY, GP KATINGER, H BARBAS, CF BURTON, DR HO, DD MOORE, JP TI CROSS-CLADE NEUTRALIZATION OF PRIMARY ISOLATES OF HUMAN-IMMUNODEFICIENCY-VIRUS TYPE-1 BY HUMAN MONOCLONAL-ANTIBODIES AND TETRAMERIC CD4-IGG SO JOURNAL OF VIROLOGY LA English DT Article ID SOLUBLE CD4; ENVELOPE GLYCOPROTEIN; GP120; BINDING; HIV-1; EPITOPE; RESISTANCE; GENOTYPES; AFFINITY; THAILAND AB We have tested three human monoclonal antibodies (MAbs) IgG1b12 2G12, and 2F5) to the envelope glycoproteins of human immunodeficiency virus type 1 (HIV-1), and a tetrameric CD4-IgG molecule (CD4-IgG2), for the ability to neutralize primary HIV-1 isolates from the genetic clades A through F and from group O. Each of the reagents broadly and potently neutralized B-clade isolates. The 2F5 MAb and the CD4-IgG2 molecule also neutralized strains from outside the B clade, with the same breadth and potency that they showed against B clade strains. The other two MAbs were able to neutralize a significant proportion of strains from outside the B clade, although there was a reduction in their efficacy compared with their activity against B-Clade isolates. Neutralization of isolates by 2F5 correlated with their possession of the LDKW motif in a segment of gp41 near the membrane-spanning domain. The other two MAbs and CD4-IgG2 recognize discontinuous binding sites on gp120, and so no comparison between genetic sequence and virus neutralization was possible. Our data show that a vaccine based on the induction of humoral immunity that is broadly active across the genetic clades is not impossible if immunogens that express the epitopes for MAbs such as 2F5, 2G12, and IgG1b12 in immunogenic configurations can be created. Furthermore, if the three MAbs and CD4-IgG2 produce clinical benefit in immunotherapeutic trials in the United States or Europe, they may also do so elsewhere in the world. C1 NYU, SCH MED, AARON DIAMOND AIDS RES CTR, NEW YORK, NY 10016 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. PROGEN PHARMACEUT INC, TARRYTOWN, NY 10591 USA. AGR UNIV VIENNA, INST APPL MICROBIOL, A-1180 VIENNA, AUSTRIA. SCRIPPS RES INST, LA JOLLA, CA 92037 USA. RI Trkola, Alexandra/K-2115-2012; OI Trkola, Alexandra/0000-0003-1013-876X; Korber, Bette/0000-0002-2026-5757 FU NIAID NIH HHS [N01 AI35168, R01 AI 25541, R01 AI 36082] NR 81 TC 437 Z9 441 U1 1 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0022-538X J9 J VIROL JI J. Virol. PD NOV PY 1995 VL 69 IS 11 BP 6609 EP 6617 PG 9 WC Virology SC Virology GA RZ100 UT WOS:A1995RZ10000001 PM 7474069 ER PT J AU NOIRI, E ROMANOV, V FOREST, T GAILIT, J DIBONA, GF MILLER, F SOM, P OSTER, ZH GOLIGORSKY, MS AF NOIRI, E ROMANOV, V FOREST, T GAILIT, J DIBONA, GF MILLER, F SOM, P OSTER, ZH GOLIGORSKY, MS TI PATHOPHYSIOLOGY OF RENAL TUBULAR OBSTRUCTION - THERAPEUTIC ROLE OF SYNTHETIC RGD PEPTIDES IN ACUTE-RENAL-FAILURE SO KIDNEY INTERNATIONAL LA English DT Editorial Material ID CELL SUBSTRATE ADHESION; EXTRACELLULAR-MATRIX; FOCAL ADHESION; ALPHA-ACTININ; INTERCELLULAR-ADHESION; MONOCLONAL-ANTIBODIES; INTEGRIN RECEPTORS; TYROSINE KINASE; POTENTIAL ROLE; NITRIC-OXIDE C1 SUNY STONY BROOK,DEPT PHYSIOL & BIOPHYS,STONY BROOK,NY 11794. SUNY STONY BROOK,DEPT PATHOL,STONY BROOK,NY 11794. SUNY STONY BROOK,DEPT NUCL MED,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,UPTON,NY 11973. NCI,FREDERICK,MD 21701. IOWA MED COLL,DEPT INTERNAL MED,IOWA CITY,IA. RP NOIRI, E (reprint author), SUNY STONY BROOK,DEPT MED,STONY BROOK,NY 11794, USA. FU NIDDK NIH HHS [DK-45695] NR 91 TC 32 Z9 33 U1 0 U2 1 PU BLACKWELL SCIENCE PUBL INC CAMBRIDGE PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0085-2538 J9 KIDNEY INT JI Kidney Int. PD NOV PY 1995 VL 48 IS 5 BP 1375 EP 1385 DI 10.1038/ki.1995.426 PG 11 WC Urology & Nephrology SC Urology & Nephrology GA TA830 UT WOS:A1995TA83000001 PM 8544393 ER PT J AU FULTON, JL PFUND, DM MCCLAIN, JB ROMACK, TJ MAURY, EE COMBES, JR SAMULSKI, ET DESIMONE, JM CAPEL, M AF FULTON, JL PFUND, DM MCCLAIN, JB ROMACK, TJ MAURY, EE COMBES, JR SAMULSKI, ET DESIMONE, JM CAPEL, M TI AGGREGATION OF AMPHIPHILIC MOLECULES IN SUPERCRITICAL CARBON-DIOXIDE - A SMALL-ANGLE X-RAY-SCATTERING STUDY SO LANGMUIR LA English DT Article ID IN-OIL MICROEMULSIONS; NEUTRON-SCATTERING; PHASE-BEHAVIOR; AOT; WATER; PROPANE; SURFACTANT; MICELLES; ETHANE AB Highly soluble amphiphilic materials are shown to form aggregates in supercritical CO2. The strategy for synthesis of these amphiphilic molecules involves incorporating CO2-philic segments that, for this study, are perfluorinated alkyl chains. These CO2-philic regions function like the hydrocarbon tails of conventional surfactant molecules used in liquid organic solvents. Synthesis and characterization of three different CO2 amphiphiles are reported. Subsequent small angle X-ray scattering (SAXS) measurements were used to characterize the aggregation of these materials in supercritical CO2. Each of the three amphiphiles studied showed a different type of aggregation behavior. A graft copolymer consisting of a CO2-philic backbone and CO2-phobic grafts associated into a micellar structure in the presence of water to promote hydrogen bonding. These aggregates contain approximately 600 grafts in the core. The commercially available surfactant perfluoroalkylpoly(ethylene oxide), or F(CF2)(6-10)CH2CH2O(CH2CH2O)(3-8)H, forms classic reverse micelle structures having radii of about 84 Angstrom under the conditions of high pressure required to solubilize the material. A third amphiphile, the semifluorinated alkane diblock molecule F(CF2)(10)(CH2)(10)H, may form small aggregates of at most 4 unimers per aggregate. The improved understanding of amphiphile aggregation in CO2 will aid:in the development of new routes for polymer and organic synthesis in this relatively benign solvent. C1 PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. UNIV N CAROLINA, VENABLE & KENAN LABS, CHAPEL HILL, NC 27599 USA. BROOKHAVEN NATL LAB, NATL SYNCHROTRON LIGHT SOURCE, UPTON, NY 11973 USA. NR 41 TC 138 Z9 140 U1 1 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD NOV PY 1995 VL 11 IS 11 BP 4241 EP 4249 DI 10.1021/la00011a014 PG 9 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TF282 UT WOS:A1995TF28200014 ER PT J AU FANG, JY GAUL, DF CHUMANOV, G COTTON, TM UPHAUS, RA AF FANG, JY GAUL, DF CHUMANOV, G COTTON, TM UPHAUS, RA TI CHARACTERIZATION OF PHOTOSYNTHETIC REACTION CENTERS FROM RHODOBACTER-SPHAEROIDES AT THE AIR-WATER-INTERFACE AND IN LANGMUIR-BLODGETT-FILMS SO LANGMUIR LA English DT Article ID RHODOPSEUDOMONAS-VIRIDIS; MEMBRANES; MONOLAYERS; PROTEINS; MODEL AB Monolayers of the reaction center complex from Rhodobacter sphaeroides were prepared from dodecyl beta-maltoside suspensions at an air-water interface. The stability of these monolayers was determined A value of 28 nm(2) per complex was obtained for the cross-sectional area from the equilibrium surface pressure-area isotherms. Multilayer films of alternating arachidic acid-reaction center monolayers were constructed on quartz slides by the Langmuir-Blodgett technique. Absorption spectroscopy was used to confirm the structural integrity of the complex and to determine the transfer ratio. Low-angle X-ray diffraction measurements were performed on these multilayers. A value of 64 Angstrom was obtained for the thickness of the reaction center monolayer in the multilayer film. This novel approach can be used to study multilayers of other membrane-bound proteins. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 20 TC 11 Z9 12 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0743-7463 J9 LANGMUIR JI Langmuir PD NOV PY 1995 VL 11 IS 11 BP 4366 EP 4370 DI 10.1021/la00011a032 PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TF282 UT WOS:A1995TF28200032 ER PT J AU Anderson, KM Seed, T Plate, JMD Jajeh, A Meng, J Harris, JE AF Anderson, KM Seed, T Plate, JMD Jajeh, A Meng, J Harris, JE TI Selective inhibitors of 5-lipoxygenase reduce CML blast cell proliferation and induce limited differentiation and apoptosis SO LEUKEMIA RESEARCH LA English DT Article DE CML blast cells; apoptosis; 5-lipoxygenase inhibitors ID CHRONIC MYELOGENOUS LEUKEMIA; ARACHIDONIC-ACID; 5,8,11,14-EICOSATETRAYNOIC ACID; DNA FRAGMENTATION; CIS-MYC; C-FOS; DEATH; GENERATION; LEUKOTRIENE-C4; METABOLISM AB Inhibitors of the arachidonic acid metabolizing enzyme, 5-lipoxygenase, reduce the rate of proliferation of chronic myelogenous leukemia blast cells. The inhibitory agents studied were ETYA, A63162 and SC41661A. These reagents induced differentiation of cultured chronic myelogenous leukemia cells from blast to promyelocytic morphology. Promyelocytic cells then underwent apoptosis, which was identified by nuclear and cytoplasmic morphological features and by DNA laddering. Proliferation of monoblastoid U937 and myelomonocytic HL60 cell lines, known to contain 5-lipoxygenase and synthesize leukotrienes, was reduced by these inhibitors. U937 cells cultured with ETYA, A63162 or SC41661A for 48 h exhibited apoptosis as assessed by DNA laddering and morphology. Characteristic ultrastructural changes of apoptosis were seen at 120 h, MK886, an inhibitor of 5-lipoxygenase with a mechanism of action distinct from oxidation/reduction reagents, at 20-40 mu M also inhibited CML and U937 cell proliferation and induced apoptosis, as shown by DNA laddering and ultrastructure. C1 RUSH MED COLL,DEPT MED,CHICAGO,IL 60612. ARGONNE NATL LAB,CTR MECH BIOL & BIOTECHNOL,ARGONNE,IL 60439. COOK CTY HOSP,SECT HEMATOL,CHICAGO,IL 60612. RP Anderson, KM (reprint author), RUSH MED COLL,DEPT BIOCHEM,CHICAGO,IL 60612, USA. NR 57 TC 48 Z9 49 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0145-2126 J9 LEUKEMIA RES JI Leuk. Res. PD NOV PY 1995 VL 19 IS 11 BP 789 EP 801 DI 10.1016/0145-2126(95)00043-7 PG 13 WC Oncology; Hematology SC Oncology; Hematology GA TM729 UT WOS:A1995TM72900002 PM 8551795 ER PT J AU BURTON, HD AF BURTON, HD TI WOMEN SCIENTISTS IN AMERICA - BEFORE AFFIRMATIVE-ACTION, 1940-1972 - ROSSITER,MW SO LIBRARY JOURNAL LA English DT Book Review RP BURTON, HD (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU BOWKER MAGAZINE GROUP CAHNERS MAGAZINE DIVISION PI NEW YORK PA 249 W 17TH ST, NEW YORK, NY 10011 SN 0363-0277 J9 LIBR J JI Libr. J. PD NOV 1 PY 1995 VL 120 IS 18 BP 103 EP 103 PG 1 WC Information Science & Library Science SC Information Science & Library Science GA TB761 UT WOS:A1995TB76100237 ER PT J AU CARLSON, JW ROOS, MS AF CARLSON, JW ROOS, MS TI SHIELDED GRADIENT COILS ON HYPERBOLIC SURFACES OF REVOLUTION SO MAGNETIC RESONANCE IN MEDICINE LA English DT Article DE GRADIENT COILS; MRI HARDWARE AB A formalism for the calculation of fields generated by current distributions on hyperbolic surfaces of revolution is presented and used to generate designs for shielded gradient coils. One application is the development of small, insertable coils suitable for head imaging while allowing clearance for shoulders. This technique demonstrates that efficient designs that offer substantial advantages over conventional cylindrical designs are possible. C1 TOSHIBA AMER MRI INC,RADIOL IMAGING LAB,S SAN FRANCISCO,CA. UNIV CALIF SAN FRANCISCO,DEPT RADIOL,SAN FRANCISCO,CA 94143. LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA. FU NHLBI NIH HHS [HL 25848] NR 11 TC 5 Z9 6 U1 4 U2 4 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0740-3194 J9 MAGNET RESON MED JI Magn.Reson.Med. PD NOV PY 1995 VL 34 IS 5 BP 762 EP 769 DI 10.1002/mrm.1910340516 PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA TD428 UT WOS:A1995TD42800015 PM 8544698 ER PT J AU ONUCHIC, LF SCHRICK, JJ MA, J HUDSON, T GUAYWOODFORD, LM ZERRES, K WOYCHIK, RP REEDERS, ST AF ONUCHIC, LF SCHRICK, JJ MA, J HUDSON, T GUAYWOODFORD, LM ZERRES, K WOYCHIK, RP REEDERS, ST TI SEQUENCE-ANALYSIS OF THE HUMAN HTG737 GENE AND ITS POLYMORPHIC SITES IN PATIENTS WITH AUTOSOMAL RECESSIVE POLYCYSTIC KIDNEY-DISEASE SO MAMMALIAN GENOME LA English DT Article ID MOUSE; MODEL AB DNA sequence analysis of the human Tg737 gene was performed in 36 patients with the autosomal recessive form of polycystic kidney disease (ARPKD). Coding exons and their adjacent splice sites were screened for mutations. Pathogenic exon or splice region mutations were not identified although one exonic and two intronic polymorphic sires were discovered. These results are in agreement with another study that has recently reported linkage to Chromosome (Chr) 6p21-cen in a set of 16 ARPKD families. STS mapping has localized the gene to a YAC contig that includes D13S175 on chromosome 13q12.1. The polymorphisms found in the hTg737 gene will permit its future evaluation as a candidate gene for other recessive cystic renal diseases and as a modifier gene in human PKD. C1 YALE UNIV,SCH MED,NEPHROL SECT,NEW HAVEN,CT 06510. UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. MIT,CTR GENOME RES,CAMBRIDGE,MA 02139. HARVARD UNIV,CHILDRENS HOSP,SCH MED,DIV NEPHROL,BOSTON,MA 02115. UNIV BONN,INST HUMAN GENET,W-5300 BONN 1,GERMANY. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. HOWARD HUGHES MED INST,NEW HAVEN,CT 06510. RI Onuchic, Luiz/H-1589-2012 NR 16 TC 11 Z9 11 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-8990 J9 MAMM GENOME JI Mamm. Genome PD NOV PY 1995 VL 6 IS 11 BP 805 EP 808 DI 10.1007/BF00539009 PG 4 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Genetics & Heredity GA TF651 UT WOS:A1995TF65100010 PM 8597639 ER PT J AU CARTY, JS AF CARTY, JS TI THE DEPARTMENT-OF-ENERGY PERSPECTIVE ON ISOTOPE PRODUCTION IN THE UNITED-STATES SO MATERIALS EVALUATION LA English DT Article RP CARTY, JS (reprint author), US DOE,WASHINGTON,DC 20585, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC NON-DESTRUCTIVE TEST PI COLUMBUS PA 1711 ARLINGATE LANE PO BOX 28518, COLUMBUS, OH 43228-0518 SN 0025-5327 J9 MATER EVAL JI Mater. Eval. PD NOV PY 1995 VL 53 IS 11 BP 1239 EP 1240 PG 2 WC Materials Science, Characterization & Testing SC Materials Science GA TD418 UT WOS:A1995TD41800002 ER PT J AU HARRISON, WTA GIER, TE STUCKY, GD SCHULTZ, AJ AF HARRISON, WTA GIER, TE STUCKY, GD SCHULTZ, AJ TI STRUCTURAL STUDY OF THE FERROELECTRIC TO PARAELECTRIC PHASE-TRANSITION IN TLTIOPO(4) SO MATERIALS RESEARCH BULLETIN LA English DT Article DE THALLIUM; TITANIUM; PHOSPHATE ID OPTICAL-PROPERTIES; CRYSTAL-STRUCTURE; PHOSPHATE; KTIOPO4 AB The crystal structures of thallium titanyl phosphate TlTiOPO4, have been determined at room temperature, at 500 degrees C, and at 650 degrees C, by using time-of-flight neutron single crystal diffraction. The structures below and above the ferroelectric to paraelectric phase transition (T-c = 583 degrees C) are compared: the data suggest a displacive second order phase transition which is dominated by thallium ion motion, but is also accompanied by subtle displacements of the framework atoms, during which, one of the two distinct TiO6 octahedra regularizes to (1) over bar symmetry. C1 UNIV CALIF SANTA BARBARA,DEPT CHEM,SANTA BARBARA,CA 93106. ARGONNE NATL LAB,DIV CHEM & MAT SCI,ARGONNE,IL 60439. RP HARRISON, WTA (reprint author), UNIV HOUSTON,DEPT CHEM,UNIV PK,HOUSTON,TX 77204, USA. NR 15 TC 23 Z9 23 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0025-5408 J9 MATER RES BULL JI Mater. Res. Bull. PD NOV PY 1995 VL 30 IS 11 BP 1341 EP 1349 DI 10.1016/0025-5408(95)00145-X PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA TF649 UT WOS:A1995TF64900003 ER PT J AU HOU, PY STRINGER, J AF HOU, PY STRINGER, J TI THE EFFECT OF REACTIVE ELEMENT ADDITIONS ON THE SELECTIVE OXIDATION, GROWTH AND ADHESION OF CHROMIA SCALES SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE REACTIVE ELEMENT EFFECT; CHROMIA SCALES ID HIGH-TEMPERATURE OXIDATION; ION-IMPLANTED YTTRIUM; WT-PERCENT CR; OXIDE SCALE; METAL INTERFACE; CR2O3 SCALES; PERCENT Y2O3; ALLOYS; ADHERENCE; BEHAVIOR AB The addition of minor amounts of reactive elements to Cr2O3 or Al2O3 forming alloys has been known to produce a number of beneficial effects in improving their oxidation resistance. The mechanism by which these elements influence oxidation is, however unclear. In this paper, the effect of reactive element addition, whether as surface or alloying additives, on the development, growth and adhesion of Cr2O3 scales is discussed. It is pointed out that the development of a continuous external Cr2O3 layer and the elimination of base metal oxidation are not coupled processes; reactive element additions can eliminate the latter, but not always affect the former. The incorporation of a reactive element in oxide scales is essential for modifying scale growth. However, a slower oxidation rate or a change in the overall oxide growth direction are not critical factors in improving scale adhesion. In light of these and other experimental results, current theories concerning the reactive element effect are critically evaluated. C1 ELECT POWER RES INST,PALO ALTO,CA 94304. RP HOU, PY (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 98 TC 157 Z9 169 U1 3 U2 32 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD NOV 1 PY 1995 VL 202 IS 1-2 BP 1 EP 10 DI 10.1016/0921-5093(95)09798-8 PG 10 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TB866 UT WOS:A1995TB86600001 ER PT J AU NIEH, TG LESUER, DR SYN, CK AF NIEH, TG LESUER, DR SYN, CK TI CHARACTERIZATION OF A COMMERCIAL SUPERPLASTIC STAINLESS-STEEL, SUPERDUX64 SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE SUPERPLASTIC PROPERTIES; STAINLESS STEEL; GRAIN BOUNDARY SLIDING ID STRAIN RATE SUPERPLASTICITY; HIGH-TEMPERATURE; CREEP-BEHAVIOR; DEFORMATION; ALLOY; COMPOSITES; CAVITATION; ALUMINUM AB The superplastic properties of SuperDux64 have been characterized at temperatures ranging from 1173 to 1323 K and strain rate ranging from 10(-4) to 10(-1) s(-1). The strain rate sensitivity value for SuperDux64 is about 0.5, suggesting that grain boundary sliding is the dominant deformation mechanism. The apparent activation energy in the superplastic region is approximately 450 kJ mol(-1). Strain accommodation at grain triple junctions is accomplished by the preferential dynamic recrystallization in the soft phase (i.e., ferrite). The cavitation behavior of SuperDux64 was also studied. Cavitation was found to occur in distinct bands that corresponded to regions containing high concentrations of gamma phase in the delta matrix. The roles of heterophase and homophase boundaries, and their effects on boundary sliding are discussed. Strain incompatibility al grain triple junctions (resulting from the differential strain rates between a hetero-boundary and home-boundary) is also addressed. RP NIEH, TG (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-350,LIVERMORE,CA 94550, USA. RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 35 TC 8 Z9 8 U1 1 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD NOV 1 PY 1995 VL 202 IS 1-2 BP 43 EP 51 DI 10.1016/0921-5093(95)09790-2 PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TB866 UT WOS:A1995TB86600006 ER PT J AU WANG, JN NIEH, TG AF WANG, JN NIEH, TG TI ROLE OF PEIERLS STRESS IN POWER-LAW DISLOCATION CREEP SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE PEIERLS STRESS; POWER LAW CREEP; HARPER-DORN CREEP ID HARPER-DORN CREEP; STEADY-STATE CREEP; HIGH-TEMPERATURE; DEPENDENCE; EQUATION AB Based on the features of Harper-Dorn creep and the transition stress from this creep to power law creep, a relationship between the Peierls stress and the empirical constants in the Dorn equations for power law creep is derived, and is shown to agree very well with experimental data on metals, ceramics, and silicates. It is therefore inferred that the Peierls stress may plan an important role in power law creep as in Harper-Dorn creep. C1 UNIV TOKYO,EARTHQUAKE RES INST,BUNKYO KU,TOKYO 113,JAPAN. RP WANG, JN (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-370,LIVERMORE,CA 94551, USA. RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 27 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD NOV 1 PY 1995 VL 202 IS 1-2 BP 52 EP 56 DI 10.1016/0921-5093(95)09789-9 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TB866 UT WOS:A1995TB86600007 ER PT J AU SINTUBIN, M WENK, HR PHILLIPS, DS AF SINTUBIN, M WENK, HR PHILLIPS, DS TI TEXTURE DEVELOPMENT IN PLATY MATERIALS - COMPARISON OF BI2223 AGGREGATES WITH PHYLLOSILICATE FABRICS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article DE TEXTURE; PLATY GRAIN MORPHOLOGY ID PREFERRED ORIENTATION; SLATY CLEAVAGE; STRAIN; SCHISTOSITY; DEFORMATION; COMPACTION; HISTORY AB Quantitative texture data have been measured by X-ray diffraction on Bi2223 powders, cold-pressed to different pellet strains. Comparisons of Bi2223 aggregates and geological phyllosilicate fabrics show that both materials, characterized by a platy grain morphology, exhibit a similar texture development. This texture development is best explained by grain-shape-induced rotation processes, which are eventually limited by grain-on-grain impingements of the relatively rigid particles. With increasing compaction, the degree of preferred orientation of platelets levels off at (001) pole densities of five to six multiples of a random distribution (m.r.d.). By contrast, intracrystalline slip mechanisms would produce much stronger textures at equivalent strains. From analogy with phyllosilicate fabrics it is suggested that textures in Bi2223 compacts could be improved by hot-pressing rather than cold-pressing to alleviate incompatibilities at grain boundaries. Pole densities of 20 m.r.d. have been produced in experiments and observed in naturally deformed argillaceous rocks. Such processing would also improve grain contacts. Of secondary importance is the size of the rigid, equiaxed, second-phase particles, which needs to be reduced to obtain stronger crystallite alignment. For geological research, Bi2223 compacts may serve as an experimental analogue, which approaches real phyllosilicate fabrics better than the materials used in experiments to date. C1 UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,BERKELEY,CA 94720. LOS ALAMOS NATL LAB,CERAM SCI & TECHNOL GRP,LOS ALAMOS,NM 87545. RP SINTUBIN, M (reprint author), KATHOLIEKE UNIV LEUVEN,ALGEMENE GEOL LAB,REDINGENSTR 16,B-3000 LOUVAIN,BELGIUM. RI Sintubin, Manuel/A-7734-2012 OI Sintubin, Manuel/0000-0002-5859-8573 NR 41 TC 10 Z9 10 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD NOV 1 PY 1995 VL 202 IS 1-2 BP 157 EP 171 DI 10.1016/0921-5093(95)09811-9 PG 15 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TB866 UT WOS:A1995TB86600020 ER PT J AU Luo, P Nieh, TG AF Luo, P Nieh, TG TI Synthesis of ultrafine hydroxyapatite particles by a spray dry method SO MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC MATERIALS SENSORS AND SYSTEMS LA English DT Article; Proceedings Paper CT Symposium on Biomolecular and Biomimetic Materials, at the Fall 1994 Materials-Research-Society Meeting CY NOV 28-DEC 02, 1994 CL BOSTON, MA SP Mat Res Soc DE hydroxyapatite; nanocrystalline structure; thermal stability ID GEL AB A technique was developed to synthesize hydroxyapatite (HA) with a nanocrystalline structure. The method involved the initial preparation of an aqueous solution using inorganic water-soluble compounds. A precursor powder mixture was subsequently formed via atomization by spray drying the aqueous solution. Calcination of the spray-dried precursor powder resulted in the formation of a nanocrystalline structure. Structural and morphological characterizations of the synthesized material were conducted using X-ray diffraction (XRD). Fourier Transform Infrared Spectroscopy (FTIR), and electron microscopy (SEM and TEM). Particle size distribution was analyzed using X-ray peak broadening and TEM techniques. The thermal stability of the powder was also characterized and was compared with that of powders made using conventional precipitation methods. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 13 TC 50 Z9 53 U1 2 U2 11 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0928-4931 J9 MAT SCI ENG C-BIOMIM JI Mater. Sci. Eng. C-Biomimetic Mater. Sens. Syst. PD NOV PY 1995 VL 3 IS 2 BP 75 EP 78 DI 10.1016/0928-4931(95)00089-5 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA TK797 UT WOS:A1995TK79700003 ER PT J AU CARPENTER, SH STUCH, TE SALZBRENNER, R AF CARPENTER, SH STUCH, TE SALZBRENNER, R TI INVESTIGATION OF THE MECHANICAL DAMPING OF DUCTILE IRON SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article; Proceedings Paper CT Symposium on Mechanics and Mechanisms of Material Damping, at the 1993 Materials Week Meeting of TMS/ASM CY 1993 CL PITTSBURGH, PA SP TMS, ASM ID FRACTURE-TOUGHNESS; CAST-IRON AB Ductile iron has been suggested as a candidate material for a number of practical applications, including turbine castings, automotive components, and transportation and storage casks for hazardous and radioactive materials. The applications require the enhanced ductility resulting from the presence of spherical graphite nodules in the ductile ferrite iron matrix. Proper design of such components requires a knowledge of the mechanical properties, including how energy is absorbed and dissipated (mechanical damping) by the test material. This article is a study of the mechanical damping of a series of well-characterized ductile iron materials (four separate materials) as a function of strain amplitude, temperature over the range of -100 degrees C to + 100 degrees C, and magnetic field. The major sources of damping were found to be dislocation motion in the graphite phase and magnetomechanical damping in the ferrite phase. The magnitude of the magnetomechanical damping was much larger than that due to dislocation motion. An additional goal of the investigation was to determine if any correlation existed between the measured mechanical damping and the fracture toughness of the ductile iron materials; no correlation was found. C1 SANDIA NATL LABS,MAT PERFORMANCE & RELIABIL PROGRAM,ALBUQUERQUE,NM 87185. RP CARPENTER, SH (reprint author), UNIV DENVER,DEPT PHYS,DENVER,CO 80208, USA. NR 18 TC 1 Z9 1 U1 1 U2 2 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD NOV PY 1995 VL 26 IS 11 BP 2785 EP 2790 DI 10.1007/BF02669636 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TA564 UT WOS:A1995TA56400003 ER PT J AU ABRAHAM, DP ALTSTETTER, CJ AF ABRAHAM, DP ALTSTETTER, CJ TI THE EFFECT OF HYDROGEN ON THE YIELD AND FLOW-STRESS OF AN AUSTENITIC STAINLESS-STEEL SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID HIGH-PURITY IRON; GAS-EVOLVING ELECTRODES; MECHANICAL-PROPERTIES; SOLID-SOLUTION; DEFORMATION; FRACTURE; NICKEL; METALS; EMBRITTLEMENT; DISLOCATIONS AB Tensile tests on 310s stainless steel foils, with and without hydrogen, were conducted at temperatures from 77 to 295 K and strain rates from 10(-3) to 10(-6)/s. Cathodic charging at elevated temperatures and at very low current densities was used to produce homogeneous solid solutions of hydrogen in this material. The yield stress and flow stress were found to increase with hydrogen content. Discontinuous yielding was observed at room temperature for specimens with hydrogen contents greater than 5 at. pct. The ductility, as measured by the strain to failure, was not critically dependent on hydrogen concentration at 77 and 295 K but was reduced at intermediate temperatures. The changes in mechanical behavior are discussed in terms of hydrogen-dislocation interactions. C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. RP ABRAHAM, DP (reprint author), UNIV ILLINOIS,DEPT MAT SCI & ENGN,1304 W GREEN ST,URBANA,IL 61801, USA. NR 85 TC 77 Z9 77 U1 1 U2 18 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD NOV PY 1995 VL 26 IS 11 BP 2849 EP 2858 DI 10.1007/BF02669643 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TA564 UT WOS:A1995TA56400010 ER PT J AU ABRAHAM, DP ALTSTETTER, CJ AF ABRAHAM, DP ALTSTETTER, CJ TI HYDROGEN-ENHANCED LOCALIZATION OF PLASTICITY IN AN AUSTENITIC STAINLESS-STEEL SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID NOTCHED BEND SPECIMENS; STACKING-FAULT ENERGY; ELECTRON-MICROSCOPY; ASSISTED CRACKING; C ALLOYS; NICKEL; DEFORMATION; FRACTURE; EMBRITTLEMENT; DISLOCATIONS AB Microscopic observations and the results of static strain aging, stress redilatation, and strain rate change tests on 310s stainless steel foils, with and without hydrogen, have been presented to complement the stress-strain curves in a previous article. The hydrogen-free specimens showed minute yield points during static strain aging, while the hydrogen-containing specimens demonstrated ''preyield microstrain.'' Thermal activation analysis of the strain rate change and stress relaxation plots led to the conclusion that the activation area for dislocation motion is decreased by hydrogen. Microstructural examination with the scanning electron microscope (SEM) revealed extensive strain localization, while transmission electron microscopy (TEM) studies showed microtwinning and austenite faulting in hydrogenated specimens tested at room temperature. The relation of hydrogen-induced changes in plastic deformation to hydrogen embrittlement is discussed. C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. RP ABRAHAM, DP (reprint author), UNIV ILLINOIS,DEPT MAT SCI & ENGN,1304 W GREEN ST,URBANA,IL 61801, USA. NR 70 TC 87 Z9 92 U1 3 U2 25 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1073-5623 J9 METALL MATER TRANS A JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci. PD NOV PY 1995 VL 26 IS 11 BP 2859 EP 2871 DI 10.1007/BF02669644 PG 13 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TA564 UT WOS:A1995TA56400011 ER PT J AU NISHIIZUMI, K ARNOLD, JR BROWNLEE, DE CAFFEE, MW FINKEL, RC HARVEY, RP AF NISHIIZUMI, K ARNOLD, JR BROWNLEE, DE CAFFEE, MW FINKEL, RC HARVEY, RP TI BE-10 AND AL-26 IN INDIVIDUAL COSMIC SPHERULES FROM ANTARCTICA SO METEORITICS LA English DT Article ID MASS-DISTRIBUTION; GREENLAND; PARTICLES; SEDIMENT; METEORITES; BE-10; SOLAR; DUST AB We present data for the cosmogenic nuclides Be-10 and Al-26 in a suite of 24 estraterrestrial spherules, collected from Antarctic moraines and deep sea sediments. All of the IO large spherules collected in glacial till at Lewis Cliff are extraterrestrial. As in earlier work, the great majority of particles show prominent solar cosmic-ray (SCR) production of Al-26, indicating bombardment ages on the order of 10(6) years or even longer. These long ages are in direct contradiction to model ages for small particles in the inner Solar System and may require reconsideration of models of small particle lifetimes. A small fraction of the particles so far measured (6/42) possess cosmogenic radionuclide patterns consistent with predictions for meteoroid spall droplets. We believe that most of the spherules were bombarded in space primarily as bodies not much larger than their present size. The content of in situ produced Be-10 and Al-26 in quart, pebbles in the same moraine suggests that these spherules may have on average a significant terrestrial age. C1 UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093. UNIV WASHINGTON,DEPT ASTRON,SEATTLE,WA 98195. LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94551. CASE WESTERN RESERVE UNIV,DEPT GEOL SCI,CLEVELAND,OH 44106. RP NISHIIZUMI, K (reprint author), UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720, USA. RI Caffee, Marc/K-7025-2015 OI Caffee, Marc/0000-0002-6846-8967 NR 28 TC 18 Z9 18 U1 0 U2 5 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD NOV PY 1995 VL 30 IS 6 BP 728 EP 732 PG 5 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TD678 UT WOS:A1995TD67800014 ER PT J AU CHUMBLEY, LS MEYER, M FREDRICKSON, K LAABS, F AF CHUMBLEY, LS MEYER, M FREDRICKSON, K LAABS, F TI COMPUTER NETWORKED SCANNING ELECTRON-MICROSCOPE FOR TEACHING, RESEARCH, AND INDUSTRY APPLICATIONS SO MICROSCOPY RESEARCH AND TECHNIQUE LA English DT Article DE SCANNING ELECTRON MICROSCOPY; TEACHING; COMPUTER; NETWORK; REMOTE CONTROL; ETHERNET; INTERNET AB A laboratory designed for teaching the operation of a scanning electron microscope (SEM) has been developed. The laboratory makes use of a computer network to allow remote operation of the SEM. Movable teaching stations, consisting of a computer, TV monitor, and joystick control, enable students to view the image on the SEM screen, move the sample, control the basic operating parameters of the microscope, and acquire X-ray spectra. Images can also be stored on the computers for image analysis or incorporation into reports. The great advantage of the system is that it has been designed to be flexible enough to allow operation from any location that has access to the Internet. The system is relatively inexpensive and uses nonproprietary computer technology available at any computer store. While the laboratory has been designed for teaching, the concept of a multiuser SEM facility that is inexpensive and easy to install should have applications in both industrial and research settings. (C) 1995 Wiley-Liss, Inc. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 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 1059-910X J9 MICROSC RES TECHNIQ JI Microsc. Res. Tech. PD NOV 1 PY 1995 VL 32 IS 4 BP 330 EP 336 PG 7 WC Anatomy & Morphology; Biology; Microscopy SC Anatomy & Morphology; Life Sciences & Biomedicine - Other Topics; Microscopy GA TB861 UT WOS:A1995TB86100006 PM 8573782 ER PT J AU Lu, ZW Klein, BM Zunger, A AF Lu, ZW Klein, BM Zunger, A TI Atomic short-range order and alloy ordering tendency in the Ag-Au system SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING LA English DT Article ID TRANSITION-METAL ALLOYS; QUANTUM-WELL STATES; ELECTRONIC-STRUCTURE; 1ST-PRINCIPLES CALCULATION; SEMICONDUCTOR ALLOYS; PHASE-DIAGRAMS; INTERMETALLIC COMPOUNDS; SPECIAL POINTS; CU-AU; DENSITY AB Accurate information of energetics is essential to map out the temperature versus composition phase diagram of a binary substitutional A(1-x)B(x) alloy. Since it is computationally prohibitive to calculate the total energies of all 2(N) configurations obtained by occupying N sites by A and B atoms, we map instead the ab initio calculated total energies of only O(10) simple structures (with less than or equal to 8 atoms/cell) onto a generalized Ising model (including pair and many-body interactions)finding that for Ag-Au a close reproduction (within similar to 2 meV/atom) of LDA energies of arbitrary structures can be achieved by including relatively short-ranged interactions. Subjecting these Ising interaction parameters to a Monte Carlo simulated annealing treatment, we obtain (i) the structures having T = 0 minimum energy ('ground states'); (ii) the order-disorder phase transition temperatures; (iii) the mixing enthalpy for the disordered alloy; and (iv) the high-temperature atomic short-range order (SRO). While the predicted ordering temperatures for the ground state structures are too low to enable direct growth into the ordered phase, the calculated mixing enthalpy and the SRO parameters for Ag-Au agree quantitatively with experiment and clearly indicate a tendency for ordering, not phase separation. C1 NATL RENEWABLE ENERGY LAB, GOLDEN, CO 80401 USA. RP Lu, ZW (reprint author), UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA. RI Zunger, Alex/A-6733-2013 NR 80 TC 10 Z9 10 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0965-0393 EI 1361-651X J9 MODEL SIMUL MATER SC JI Model. Simul. Mater. Sci. Eng. PD NOV PY 1995 VL 3 IS 6 BP 753 EP 770 DI 10.1088/0965-0393/3/6/002 PG 18 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA TL639 UT WOS:A1995TL63900002 ER PT J AU Kozaczek, KJ Sinharoy, A Ruud, CO McIlree, AR AF Kozaczek, KJ Sinharoy, A Ruud, CO McIlree, AR TI Micromechanical modelling of microstress fields around carbide precipitates in alloy 600 SO MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING LA English DT Article ID GRAIN-BOUNDARY CHEMISTRY; STRESS-CORROSION CRACKING; CR-FE ALLOYS; HEAT-TREATMENT; INCONEL 600; ELECTRON-MICROSCOPY; MICRODEFORMATION; SENSITIZATION; BEHAVIOR AB Elastic stresses in the grain boundary regions caused by the mismatch between the elastic properties of a carbide precipitate and a nickel alloy matrix were studied by finite-element modelling. The effects of the metal matrix elastic anisotropy, the precipitate elastic anisotropy and the external stress state on the microstress fields around the precipitate were analysed. An intragranular carbide precipitate is not as effective a stress raiser as a carbide precipitated at a grain boundary triple point due to the contributing effect of strain incompatibilities between the grains in the latter case. The precipitate, which has an effective elastic modulus that is higher than that for the surrounding grains, experiences more stress than the matrix, i.e. the stresses inside the precipitate are higher than in the alloy grains. The mismatch between the elastic moduli of the alloy and the precipitate has a pronounced effect on the stress distribution; the higher the precipitate modulus compared with the matrix modulus, the higher is the local stress concentration in the grains of the alloy matrix. The shape of the inclusion plays a role in the stress distribution in the grain boundary regions; sharp cowers raise stresses more effectively than rounded edges of oblong-shaped precipitates. Shear anisotropy in the precipitates affects the distribution of the von Mises (shear) stresses, and the compression anisotropy affects the state of the hydrostatic pressure: the higher the elastic anisotropy, the higher are the corresponding stress concentrations. The selection of the external stress state (shear versus hydrostatic) can reduce or enhance the effects of the precipitate elastic anisotropy. Equi-biaxial loading provides for a more uniform distribution of stresses than does uniaxial loading. The high stress fields are confined to the vicinity of the precipitate (their range is much smaller than the size of the precipitate). When the spacing between carbides at the grain boundary becomes large, their elastic interactions become insignificant. C1 PENN STATE UNIV,UNIVERSITY PK,PA 16802. ELECT POWER RES INST,PALO ALTO,CA 94304. RP Kozaczek, KJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 32 TC 13 Z9 14 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0965-0393 J9 MODEL SIMUL MATER SC JI Model. Simul. Mater. Sci. Eng. PD NOV PY 1995 VL 3 IS 6 BP 829 EP 843 DI 10.1088/0965-0393/3/6/006 PG 15 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA TL639 UT WOS:A1995TL63900006 ER PT J AU BOUDREAU, N WERB, Z BISSELL, MJ AF BOUDREAU, N WERB, Z BISSELL, MJ TI SUPPRESSION OF APOPTOSIS BY THE EXTRACELLULAR-MATRIX IN MAMMARY EPITHELIUM - RELATIONSHIP TO GROWTH-INHIBITION SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF SAN FRANCISCO,RADIOBIOL LAB,SAN FRANCISCO,CA 94143. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 14 EP 14 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300015 ER PT J AU ROSKELLEY, C LARABELL, C THOMAS, L LEVY, D ASHKENAS, J BISSELL, MJ AF ROSKELLEY, C LARABELL, C THOMAS, L LEVY, D ASHKENAS, J BISSELL, MJ TI CELL-SHAPE INFLUENCES ECM-MEDIATED SIGNAL-PROCESSING IN MAMMARY EPITHELIAL-CELLS SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 15 EP 15 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300013 ER PT J AU NARAYANSWAMI, S CRAM, LS FAWCETT, JJ GRIECO, DA SONTI, M NAVIN, A BERGSTROM, D SIMPSON, EM BOHLANDER, S AF NARAYANSWAMI, S CRAM, LS FAWCETT, JJ GRIECO, DA SONTI, M NAVIN, A BERGSTROM, D SIMPSON, EM BOHLANDER, S TI THE MOUSE Y-CHROMOSOMAL CENTROMERE - CONSTRUCTION OF DNA LIBRARIES AND SCREENING OF AN RDA CLONE BANK FOR ISOLATION OF SEQUENCES FROM THIS REGION SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 JACKSON LAB,BAR HARBOR,ME 04609. LOS ALAMOS NATL LAB,NFRC,LOS ALAMOS,NM 87545. UNIV CHICAGO,CHICAGO,IL 60637. RI Simpson, Elizabeth/H-1183-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 421 EP 421 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300420 ER PT J AU KIRSCH, T SAALBACH, G RAIKHEL, NV BEEVERS, L AF KIRSCH, T SAALBACH, G RAIKHEL, NV BEEVERS, L TI SPECIFICITY OF A POTENTIAL VACUOLAR TARGETING RECEPTOR FOR VACUOLAR TARGETING INFORMATION SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV OKLAHOMA,DEPT BOT & MICROBIOL,NORMAN,OK 73019. INST PLANT GENET & CROP PLANT RES,DEPT MOLEC CELL BIOL,D-06466 GATERSLEBEN,GERMANY. MICHIGAN STATE UNIV,DOE,RES LAB,E LANSING,MI 48824. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 605 EP 605 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300604 ER PT J AU ROWNING, BA WELLS, JC GERHART, JC WU, M LARABELL, CA AF ROWNING, BA WELLS, JC GERHART, JC WU, M LARABELL, CA TI PLUSES AND MINUSES, HEADS OR TAILS - MICROTUBULE AND ORGANELLE DYNAMICS IN THE LAYOUT OF A VERTEBRATE BODY PLAN SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 666 EP 666 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300668 ER PT J AU NOGALES, E WOLF, SG DOWNING, KH AF NOGALES, E WOLF, SG DOWNING, KH TI WHAT ELECTRON CRYSTALLOGRAPHY CAN TELL US ABOUT TUBULIN AND MICROTUBULE FUNCTION SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 682 EP 682 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300681 ER PT J AU AVRAHAM, KB HASSON, T STEEL, KP KINGSLEY, DM RUSSELL, LB MOOSEKER, MS COPELAND, NG JENKINS, NA AF AVRAHAM, KB HASSON, T STEEL, KP KINGSLEY, DM RUSSELL, LB MOOSEKER, MS COPELAND, NG JENKINS, NA TI THE MOUSE SNELLS WALTZER DEAFNESS GENE ENCODES A CLASS-VI UNCONVENTIONAL MYOSIN SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 NCI,FREDERICK CANC RES & DEV CTR,ABL,BRP,MAMMILIAN GENET LAB,FREDERICK,MD 21702. YALE UNIV,DEPT BIOL,NEW HAVEN,CT. UNIV NOTTINGHAM,MRC,INST HEARING RES,NOTTINGHAM NG7 2RD,ENGLAND. STANFORD UNIV,DEPT DEV BIOL,STANFORD,CA 94305. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 835 EP 835 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51300834 ER PT J AU RAIKHEL, NV BASSHAM, DC GAL, S DASILVACONCEICAO, A AF RAIKHEL, NV BASSHAM, DC GAL, S DASILVACONCEICAO, A TI VESICULAR TRANSPORT TO THE PLANT VACUOLE SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 MICHIGAN STATE UNIV,DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 1657 EP 1657 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51301655 ER PT J AU FORTE, TM BIELICKI, JK KNOFF, L VERNES, JM MCCALL, MR AF FORTE, TM BIELICKI, JK KNOFF, L VERNES, JM MCCALL, MR TI MOBILIZATION OF CHOLESTEROL FROM CELLS BY APOLIPOPROTEIN-A-I - FORMATION OF UNIQUE HIGH-DENSITY-LIPOPROTEIN PRECURSORS SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 1671 EP 1671 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51301670 ER PT J AU SCHISCHMANOFF, O YASWEN, P CHASIS, J MOHANDAS, N CONBOY, J AF SCHISCHMANOFF, O YASWEN, P CHASIS, J MOHANDAS, N CONBOY, J TI CELL-SHAPE DEPENDENT VARIATIONS OF PROTEIN-4.1 ALTERNATIVE SPLICING IN HUMAN MAMMARY EPITHELIAL-CELLS SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94270. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 1774 EP 1774 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51301772 ER PT J AU RAIKHEL, NV HICKS, GR LOBREAUX, S SHIEH, M HEESEPECK, A SMITH, H AF RAIKHEL, NV HICKS, GR LOBREAUX, S SHIEH, M HEESEPECK, A SMITH, H TI TARGETING OF PROTEINS TO THE PLANT NUCLEUS SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 MICHIGAN STATE UNIV,DOE,PLANT RES LAB,E LANSING,MI 48824. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 1808 EP 1808 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51301807 ER PT J AU BALHORN, R CORZETT, M HWANG, MH BENCH, GS FRIZ, AM MROZ, PJ MAZRIMAS, J PENCE, WE WEBER, C THOMPSON, L AF BALHORN, R CORZETT, M HWANG, MH BENCH, GS FRIZ, AM MROZ, PJ MAZRIMAS, J PENCE, WE WEBER, C THOMPSON, L TI ANALYSIS OF TRANSGENIC MICE CONTAINING AN ALTERED PROTAMINE-2 GENE SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. VET ADM MED CTR,BEDFORD,MA 01730. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 1837 EP 1837 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51301835 ER PT J AU ROWNING, BA WELLS, JC GERHART, JC LARABELL, CA AF ROWNING, BA WELLS, JC GERHART, JC LARABELL, CA TI MICROTUBULE-MEDIATED TRANSPORT OF ORGANELLES TOWARD THE PROSPECTIVE DORSAL SIDE OF XENOPUS EGGS SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 2005 EP 2005 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51302004 ER PT J AU ASHKENAS, J MYERS, CA SCHMIDHAUSER, C WERB, Z BISSELL, M AF ASHKENAS, J MYERS, CA SCHMIDHAUSER, C WERB, Z BISSELL, M TI STAT5 ACTIVATION IN MAMMARY EPITHELIAL-CELLS CULTURED WITH OR WITHOUT ECM SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 2228 EP 2228 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51302224 ER PT J AU BENCH, GS FRIZ, AM CORZETT, MH OLIVA, R BALHORN, R AF BENCH, GS FRIZ, AM CORZETT, MH OLIVA, R BALHORN, R TI DNA, PROTAMINE AND METAL CONTENT OF INDIVIDUAL MAMMALIAN SPERM DETERMINED BY NUCLEAR MICROSCOPY SO MOLECULAR BIOLOGY OF THE CELL LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV BARCELONA,FAC MED,BARCELONA 7,SPAIN. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC CELL BIOL PI BETHESDA PA PUBL OFFICE 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 1059-1524 J9 MOL BIOL CELL JI Mol. Biol. Cell PD NOV PY 1995 VL 6 SU S BP 2490 EP 2490 PG 1 WC Cell Biology SC Cell Biology GA TF513 UT WOS:A1995TF51302487 ER PT J AU BRUSCHI, CV MCMILLAN, JN COGLIEVINA, M ESPOSITO, MS AF BRUSCHI, CV MCMILLAN, JN COGLIEVINA, M ESPOSITO, MS TI THE GENOMIC INSTABILITY OF YEAST CDC6-1/CDC6-1 MUTANTS INVOLVES CHROMOSOME STRUCTURE AND RECOMBINATION SO MOLECULAR & GENERAL GENETICS LA English DT Article DE YEAST CDC6 GENE; GENOMIC INSTABILITY; DNA RECOMBINATION; CHROMOSOMAL REARRANGEMENT ID SACCHAROMYCES-CEREVISIAE; NUCLEAR DIVISION; GENETIC-CONTROL; CYCLE; TRANSMISSION; MITOSIS; CDC6 AB When diploid cells of Saccharomyces cerevisiae homozygous for the temperature-sensitive cell division cycle mutation cdc6-1 are grown at a semipermissive temperature they exhibit elevated genomic instability, as indicated by enhanced mitotic gene conversion, mitotic intergenic recombination, chromosomal loss, chromosomal gain, and chromosomal rearrangements. Employing quantitative Southern analysis of chromosomes separated by transverse alternating field gel electrophoresis (TAFE), we have demonstrated that 2N-1 cells monosomic for chromosome VII, owing to the cnc6-1 defect, show slow growth and subsequently yield 2N variants that grow at a normal rate in association with restitution of disomy for chromosome VII. Analysis of TAFE gels also demonstrates that cdc6-1/cdc6-1 diploids give rise to aberrant chromosomes of novel lengths. We propose an explanation for the genomic instability induced by the cdc6-1 mutation, which suggests that hyper-recombination, chromosomal loss, chromosomal gain and chromosomal rearrangements reflect aberrant mitotic division by cdc6-1/cdc6-1 cells containing chromosomes that have not replicated fully. C1 E CAROLINA UNIV,SCH MED,DEPT MICROBIOL & IMMUNOL,GREENVILLE,NC 27858. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. RP BRUSCHI, CV (reprint author), INT CTR GENET ENGN & BIOTECHNOL,DEPT MICROBIOL,AREA SCI PK,PADRICIANO 99,I-34012 TRIESTE,ITALY. NR 25 TC 22 Z9 22 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0026-8925 J9 MOL GEN GENET JI Mol. Gen. Genet. PD NOV 1 PY 1995 VL 249 IS 1 BP 8 EP 18 DI 10.1007/BF00290230 PG 11 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA TG137 UT WOS:A1995TG13700002 PM 8552037 ER PT J AU HOOVER, WG KUM, O AF HOOVER, WG KUM, O TI NONEQUILIBRIUM SIMULATIONS SO MOLECULAR PHYSICS LA English DT Article ID NONEQUILIBRIUM MOLECULAR-DYNAMICS AB Particle methods can be used in non-equilibrium simulations of both microscopic atomistic flows and macroscopic hydrodynamic flows. In the microscopic case, many-body systems can be driven away from equilibrium, into non-equilibrium states, by adding boundary, constraint, or driving forces to the usual atomistic forces: mr(NEMD) = p = F-A + F-B + F-C + F-D. The additional forces can act as energy sources and sinks, with which the driven system can exchange hear, and through which it can perform mechanical work. In adapting similar 'smoothed-particle' methods to macroscopic problems, moving boundaries and heat reservoirs can be treated more easily, simply by specifying the velocities and temperatures of special boundary particles. The smoothed-particle technique suggests a natural form of turbulent eddy viscosity which damps the shortest-wavelength hydrodynamic velocity fluctuations. Here, 25 years of development of non-equilibrium particle methods are highlighted, emphasizing the importance of thermostats and boundary conditions to this activity, and illustrating microscopic fractal phase-space distributions and the simulation of macroscopic hydrodynamic instabilities with recent worked-out examples. Some remaining puzzles are given which we hope will be solved in the near-term future. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP HOOVER, WG (reprint author), UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA, USA. NR 31 TC 7 Z9 7 U1 0 U2 3 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0026-8976 J9 MOL PHYS JI Mol. Phys. PD NOV PY 1995 VL 86 IS 4 BP 685 EP 695 DI 10.1080/00268979500102281 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TF209 UT WOS:A1995TF20900011 ER PT J AU Goormachtig, S ValerioLepiniec, M Szczyglowski, K VanMontagu, M Holsters, M deBruijn, FJ AF Goormachtig, S ValerioLepiniec, M Szczyglowski, K VanMontagu, M Holsters, M deBruijn, FJ TI Use of differential display to identify novel Sesbania rostrata genes enhanced by Azorhizobium caulinodans infection SO MOLECULAR PLANT-MICROBE INTERACTIONS LA English DT Article ID ROOT NODULE DEVELOPMENT; SATIVA SUBSP NIGRA; MESSENGER-RNA; NUCLEOTIDE-SEQUENCE; LEGHEMOGLOBIN GENES; RHIZOBIUM; STEM; EXPRESSION; CHITINASE; LEGUME AB Upon infection of the tropical legume Sesbania rostrata with Azorhizobium caulinodans ORS571, nodules are formed on the roots as well as on the stems, Stem nodules appear at multiple predetermined sites consisting of dormant root primordia, which are positioned in vertical rows along the stem of the plant, We used the differential display method to isolate and characterize three cDNA clones (differential display; didi-2, didi-13, and didi-20), corresponding to genes whose expression is enhanced in the dormant root primordia after inoculation, Database searches revealed that the deduced (partial) didi-2 gene product shares significant similarity with hydroxyproline-rich cell wall proteins, The (partial) didi-13 and didi-20 products are similar to chitinases and chalcone reductases, respectively, Transcripts corresponding to the cDNA clones didi-2 and didi-13 were first detectable 1 day after inoculation. In contrast, didi-20 transcripts were found at low levels in uninfected root primordia and were enhanced significantly around 3 days after inoculation, In addition, a cDNA was isolated (didi-42) that corresponds to the previously identified leghemoglobin gene Srlb6, These studies show that differential display is a useful method for the isolation of infection-related genes. C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. STATE UNIV GHENT,GENET LAB,B-9000 GHENT,BELGIUM. MICHIGAN STATE UNIV,DEPT MICROBIOL,E LANSING,MI 48824. NR 55 TC 69 Z9 71 U1 2 U2 2 PU AMER PHYTOPATHOLOGICAL SOC PI ST PAUL PA 3340 PILOT KNOB ROAD, ST PAUL, MN 55121 SN 0894-0282 J9 MOL PLANT MICROBE IN JI Mol. Plant-Microbe Interact. PD NOV-DEC PY 1995 VL 8 IS 6 BP 816 EP 824 DI 10.1094/MPMI-8-0816 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Plant Sciences SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Plant Sciences GA TL363 UT WOS:A1995TL36300003 PM 8664492 ER PT J AU APPLETON, B AF APPLETON, B TI TRENDS OF MAJOR RESEARCH FACILITIES RELATED TO MATERIALS SCIENCE AND ENGINEERING SO MRS BULLETIN LA English DT Editorial Material RP APPLETON, B (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD NOV PY 1995 VL 20 IS 11 BP 22 EP 22 PG 1 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA TG286 UT WOS:A1995TG28600004 ER PT J AU JOSHI, RV BLEWER, RS MURARKA, S AF JOSHI, RV BLEWER, RS MURARKA, S TI METALLIZATION FOR INTEGRATED-CIRCUIT MANUFACTURING SO MRS BULLETIN LA English DT Article C1 SANDIA NATL LABS,MICROELECTR DIRECTORATE,DEPT ADV SILICON PROGRAMS,LIVERMORE,CA 94550. RENSSELAER POLYTECH INST,CTR INTEGRATED & ELECTR & ELECTR MFG,TROY,NY 12181. RP JOSHI, RV (reprint author), IBM CORP,THOMAS J WATSON RES CTR,POB 218,YORKTOWN HTS,NY 10598, USA. NR 0 TC 1 Z9 1 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD NOV PY 1995 VL 20 IS 11 BP 33 EP 37 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA TG286 UT WOS:A1995TG28600005 ER PT J AU CULIAT, CT STUBBS, LJ WOYCHIK, RP RUSSELL, LB JOHNSON, DK RINCHIK, EM AF CULIAT, CT STUBBS, LJ WOYCHIK, RP RUSSELL, LB JOHNSON, DK RINCHIK, EM TI DEFICIENCY OF THE BETA-3 SUBUNIT OF THE TYPE-A GAMMA-AMINOBUTYRIC-ACID RECEPTOR CAUSES CLEFT-PALATE IN MICE SO NATURE GENETICS LA English DT Letter ID PRADER-WILLI SYNDROME; POSTNATAL-DEVELOPMENT; ANGELMAN SYNDROME; MESSENGER-RNAS; MOUSE STRAINS; GABA; EXPRESSION; DIAZEPAM; REGION AB In addition to its function in the nervous system gamma-aminobutyric acid (GABA) has been implicated in mouse craniofacial development by the results of both teratological(1-3), and genetic studies(4). We previously reported that disruption of the cleft palate 1 (cp1) locus, closely linked to the pink-eyed dilution (p) locus on mouse chromosome 7, causes a 95% penetrant, recessive, neonatally-lethal cleft palate (CP) in mice homozygous for the p(4THO-II) deletion(4). We proposed that the beta 3 subunit gene (Gabrb3) of the GABA(A) receptor might be a candidate for cp1 (ref. 4); our earlier studies(4,5) had localized cp1 to an interval beginning distal to the gene for the GABA(A) receptor alpha 5 subunit (Gabra5) and ending within the Gabrb3 coding region. To test the hypothesis that deletion of Gabrb3, and not another gene in the interval, causes CP, we performed an experiment to rescue the CP phenotype by introducing a Gabrb3 transgene into p(4THO-II) homozygotes. We now show that such transgenic mice are phenotypically normal, indicating that Gabrb3 is indeed the cp1 locus. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. FU NIDCR NIH HHS [DE10896] NR 19 TC 89 Z9 90 U1 0 U2 2 PU NATURE PUBLISHING CO PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 SN 1061-4036 J9 NAT GENET JI Nature Genet. PD NOV PY 1995 VL 11 IS 3 BP 344 EP 346 DI 10.1038/ng1195-344 PG 3 WC Genetics & Heredity SC Genetics & Heredity GA TC639 UT WOS:A1995TC63900029 PM 7581464 ER PT J AU MALKIN, AJ KUZNETSOV, YG LAND, TA DEYOREO, JJ MCPHERSON, A AF MALKIN, AJ KUZNETSOV, YG LAND, TA DEYOREO, JJ MCPHERSON, A TI MECHANISMS OF GROWTH FOR PROTEIN AND VIRUS CRYSTALS SO NATURE STRUCTURAL BIOLOGY LA English DT Article ID ATOMIC-FORCE MICROSCOPY; CRYSTALLIZATION AB The growth of six protein and virus crystals was investigated in situ using atomic force microscopy. Most of the crystals grew principally on steps generated by two-dimensional nucleation on surfaces though some grew by development of spiral dislocations. Apoferritin grew by a rarely encountered mechanism, normal growth, usually associated only with melt or vapour phase crystallization. Cubic crystals of satellite tobacco mosaic virus (STMV) grew, at moderate to high levels of supersaturation, by the direct addition of three-dimensional nuclei followed by their rapid normal growth and lateral expansion, a mechanism not previously described to promote controlled and reproducible crystal growth from solutions. Biological macromolecules apparently utilize a more diverse range of growth mechanisms in their crystallization than any previously studied materials. C1 UNIV CALIF RIVERSIDE,DEPT BIOCHEM,RIVERSIDE,CA 92521. LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. NR 26 TC 142 Z9 148 U1 4 U2 24 PU NATURE PUBLISHING CO PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 SN 1072-8368 J9 NAT STRUCT BIOL JI Nat. Struct. Biol. PD NOV PY 1995 VL 2 IS 11 BP 956 EP 959 DI 10.1038/nsb1195-956 PG 4 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA TD554 UT WOS:A1995TD55400012 PM 7583668 ER PT J AU Chambers, RC Rose, KA Tyler, JA AF Chambers, RC Rose, KA Tyler, JA TI Recruitment and recruitment processes of winter flounder, Pleuronectes americanus, at different latitudes: Implications of an individual-based simulation model SO NETHERLANDS JOURNAL OF SEA RESEARCH LA English DT Article DE flatfish; individual-based model; latitude; numerical experiment; Pleuronectes americanus; recruitment; simulation modelling; western North Atlantic; winter flounder ID NARRAGANSETT BAY AREA; PSEUDOPLEURONECTES-AMERICANUS; LIFE-HISTORY; LARVAL FISH; GEOGRAPHIC-VARIATION; POPULATION-DYNAMICS; JUVENILE SUMMER; WADDEN SEA; SIZE; ATLANTIC AB We evaluate the joint effects of temperature, hours of daylight, prey production, spawning regimes, and mortality rates on recruitment of winter flounder, Pleuronectes americanus, by means of an individual-based simulation model, These factors were varied to approximate conditions at three latitudinally distinct sites in winter flounder's geographic range from New Jersey, USA (southernmost site) to New Brunswick, Canada (northernmost site). Most life historical and demographic response variables from simulation output differed substantially among sites. At year's end, the recruits were larger but fewer at lower latitudes than at higher ones. We further assessed the effects of season duration, prey production, and mortality rate on recruitment by means of a 3(3)-factorial numerical experiment. This analysis provided estimates of the proportion of variance in the response variables (the number and sizes of recruits, larval and juvenile growth rates, larval period duration) due to each of the three manipulated factors and their interactions. Season duration explained most of the variation in the responses except for the sizes of recruits at year's end which was influenced most by the timing of prey production. Interaction effects of season duration and prey production were evident in all responses, reflecting the importance to flounder recruitment of the phenology of prey production relative to flounder early life history. Even though mortality rates were assigned as part of the factorial design structure, they accounted for only 10% of the variance in the number of recruits. These simulation results are in need of empirical verification and we suggest ways to proceed. We also propose means of enhancing data on winter flounder life history and ecology, and methods for expanding our model and analysis. We conclude that our approach proved useful for 1. appraising multiple, interacting recruitment processes, 2. locating areas where incomplete knowledge of winter flounder life history and the habitat it occupies limits a more satisfactory assessment of recruitment processes, and 3. identifying recruitment hypotheses that warrant further empirical evaluation. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP Chambers, RC (reprint author), HUNTSMAN MARINE SCI CTR,ST ANDREWS,NB E0G 2X0,CANADA. NR 94 TC 12 Z9 12 U1 1 U2 2 PU NETHERLANDS INST SEA RES PI TEXEL PA PO BOX 59 1790 AB DEN BURG, TEXEL, NETHERLANDS SN 0077-7579 J9 NETH J SEA RES JI Neth. J. Sea Res. PD NOV PY 1995 VL 34 IS 1-3 BP 19 EP 43 DI 10.1016/0077-7579(95)90012-8 PG 25 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA TQ940 UT WOS:A1995TQ94000003 ER PT J AU ALLEY, R AOYAGI, H CLENDENIN, J FRISCH, J GARDEN, C HOYT, E KIRBY, R KLAISNER, L KULIKOV, A MILLER, R MULHOLLAN, G PRESCOTT, C SAEZ, P SCHULTZ, D TANG, H TURNER, J WITTE, K WOODS, M YEREMIAN, AD ZOLOTOREV, M AF ALLEY, R AOYAGI, H CLENDENIN, J FRISCH, J GARDEN, C HOYT, E KIRBY, R KLAISNER, L KULIKOV, A MILLER, R MULHOLLAN, G PRESCOTT, C SAEZ, P SCHULTZ, D TANG, H TURNER, J WITTE, K WOODS, M YEREMIAN, AD ZOLOTOREV, M TI THE STANFORD LINEAR-ACCELERATOR POLARIZED ELECTRON SOURCE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Review ID SPIN POLARIZATION; GAAS PHOTOCATHODES; GALLIUM-ARSENIDE; THIN GAAS; PHOTOEMISSION; PHOTOELECTRONS; LAYER; ACTIVATION; DEPENDENCE; EMISSION AB The Stanford 3-km linear accelerator at SLAG has operated exclusively since early 1992 using a polarized electron beam for its high-energy physics programs. The polarized electron source now consists of a diode-type gun with a strained-lattice GaAs photocathode DC biased at high voltage and excited with circularly polarized photons generated by a pulsed, Ti:sapphire laser system. The electron polarization at the source is > 80%. To date the source has met all the beam requirements of the SLC and fixed target programs with < 5% downtime. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. NR 92 TC 100 Z9 101 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD NOV 1 PY 1995 VL 365 IS 1 BP 1 EP 27 DI 10.1016/0168-9002(95)00450-5 PG 27 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TA147 UT WOS:A1995TA14700001 ER PT J AU HONG, WS DREWERY, JS JING, T LEE, H KAPLAN, SN MIRESHGHI, A PEREZMENDEZ, V AF HONG, WS DREWERY, JS JING, T LEE, H KAPLAN, SN MIRESHGHI, A PEREZMENDEZ, V TI THICK (SIMILAR-TO-50-MU-M) AMORPHOUS-SILICON P-I-N-DIODES FOR DIRECT-DETECTION OF MINIMUM IONIZING PARTICLES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID A-SI-H; DEPOSITION; SILANE AB Thick(similar to 50 mu m) amorphous silicon (a-Si:H) p-i-n diodes of device quality are made by helium dilution of the process gas and heat treatment for application to minimum ionizing particle detection. Dilution of SiH4 with He decreased the dangling bond density and increased the deposition rate. The internal stress, which causes substrate bending and delamination, was reduced by a factor of 4 to similar to 90 MPa when deposited at low (150 degrees C) temperature. The electronic quality of the a-Si:H film was somewhat degraded when grown at a low temperature, but could be mostly recovered by subsequent annealing at 160 degrees C. By this technique 50 mu m thick n-i-p diodes were made without significant substrate bending, and the electronic properties, such as electron mobility and ionized dangling bond density, were suitable for detecting minimum ionizing particles. Diode readouts and integrated amplifiers for pixel arrays are also described. RP HONG, WS (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV PHYS,MS 50-348,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 32 TC 6 Z9 6 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 NOV 1 PY 1995 VL 365 IS 1 BP 239 EP 247 DI 10.1016/0168-9002(95)00410-6 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TA147 UT WOS:A1995TA14700031 ER PT J AU BAIR, AE ATZMON, Z RUSSELL, SW ALFORD, TL MAYER, JW BARBOUR, JC AF BAIR, AE ATZMON, Z RUSSELL, SW ALFORD, TL MAYER, JW BARBOUR, JC TI QUANTIFICATION OF CARBON IN SI1-X-YGEXCY WITH UNIFORM PROFILES SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID BACKSCATTERING AB Methods to quantify the carbon concentration of CVD grown Si1-x-yGexCy (0.25 < x < 0.37 and 0.01 < y < 0.12) layers on (100) Si with uniform composition profiles were investigated, Two analysis techniques were used: Rutherford backscattering spectrometry (RES) using a 4.295 MeV He+2 incident ion and elastic recoil detection (ERD) using a 24 MeV Si+5 incident ion. For the RES measurements the C-12(alpha,alpha)C-12 elastic resonance reaction near 4.265 MeV was used to enhance the scattering cross section of carbon. These carbon concentrations were calculated by either integrating the resonant scattering cross section across the energy width of the layer or by using a Lorentzian fit to estimate the area. The backscattering data were additionally analyzed with the program RUMP. These different analysis techniques resulted in a large scatter in the RES predictions for the carbon concentrations depending on how the resonant cross sectional area was calculated. The appropriateness of each technique was judged by comparing the predicted concentrations to those obtained by ERD. The divergence between the carbon concentration predicted by using the Lorentzian approximation and the ERD values was great enough to deem this method as inappropriate. The values obtained by RUMP were systematically greater than the ERD concentrations, however the percent difference was never more than 20. The predicted carbon concentration that had the closest correlation to ERD was found by integrating an appropriate scattering cross section across the energy width of the layer. C1 ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP BAIR, AE (reprint author), ARIZONA STATE UNIV,DEPT CHEM BIO & MAT ENGN,TEMPE,AZ 85287, USA. NR 17 TC 14 Z9 14 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD NOV PY 1995 VL 103 IS 3 BP 339 EP 346 DI 10.1016/0168-583X(95)00614-1 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TF850 UT WOS:A1995TF85000012 ER PT J AU LEVINE, TE NASTASI, M WALTER, KC TESMER, JR MAGGIORE, CJ AF LEVINE, TE NASTASI, M WALTER, KC TESMER, JR MAGGIORE, CJ TI DIRECT AND INDIRECT MEASUREMENTS OF HYDROGEN SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID STOPPING POWER AB We have demonstrated that the content of hydrogen in carbon-based films can be reliably calculated from a measurement made either directly using forward recoiled hydrogen or indirectly using backscattered helium. The method makes use of the surface signal height ratio of a sample of unknown composition to a standard of known composition. This approach allows elimination of several experimental parameters. The method assumes validity of Bragg's rule, potential deviations from which account for the majority of the absolute uncertainty in the hydrogen fraction. In general however, we have found agreement in hydrogen content between the two techniques for several carbon-based films. C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP LEVINE, TE (reprint author), CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853, USA. NR 9 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD NOV PY 1995 VL 103 IS 3 BP 359 EP 361 DI 10.1016/0168-583X(95)00852-7 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TF850 UT WOS:A1995TF85000015 ER PT J AU SIDDONS, DP HASTINGS, JB BERGMANN, U SETTE, F KRISCH, M AF SIDDONS, DP HASTINGS, JB BERGMANN, U SETTE, F KRISCH, M TI MOSSBAUER-SPECTROSCOPY USING SYNCHROTRON-RADIATION - OVERCOMING DETECTOR LIMITATIONS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID NUCLEAR BRAGG SCATTERING; DIFFRACTION AB Mossbauer spectroscopy using synchrotron radiation has previously been Limited by the presence of a large non-resonant radiation background which dominates the detector performance and in turn limits the useable incident flux. In this paper we show that it is possible, by using the polarization properties of hyperfine-split Mossbauer resonances in conjunction with a perfect-crystal polarimeter, to completely remove this limitation for enriched samples. For samples with natural isotopic abundance, signal-to-noise ratios close to unity are demonstrated. C1 EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE. RP SIDDONS, DP (reprint author), BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,UPTON,NY 11973, USA. NR 14 TC 17 Z9 17 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD NOV PY 1995 VL 103 IS 3 BP 371 EP 375 DI 10.1016/0168-583X(95)00654-0 PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA TF850 UT WOS:A1995TF85000018 ER PT J AU Bross, AD AF Bross, AD TI The DO detector upgrade SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence ID SOLID-STATE PHOTOMULTIPLIER AB The Fermilab collider program is undergoing a major upgrade of both the accelerator complex and the two detectors. Operation of the Tevatron at luminosities upwards of ten times that currently provided will occur in early 1999 after the commissioning of the new Fermilab Main Injector. The DO upgrade program has been established to deliver a detector that will meet the challenges of this environment. A new magnetic tracker consisting of a superconducting solenoid, a silicon vertex detector, a scintillating fiber central tracker, and a central preshower detector will replace the current central tracking and transition radiation chambers. We present the design and performance capabilities of these new systems and describe results from physics simulations that demonstrate the physics reach of the upgraded detector. RP Bross, AD (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 12 EP 19 PG 8 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400003 ER PT J AU NewmanHolmes, C AF NewmanHolmes, C TI The CDF upgrade SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence AB The Collider Detector at Fermilab will be upgraded to allow the detector to function at the higher luminosity anticipated with improvements to the Fermilab accelerator complex. The upgrades are described. RP NewmanHolmes, C (reprint author), FERMILAB NATL ACCELERATOR LAB,FERMILAB,BATAVIA,IL 60510, USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 20 EP 26 PG 7 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400004 ER PT J AU Henriques, A AF Henriques, A TI The ATLAS tile calorimeter project SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence AB The ATLAS detector at LHC has chosen a hadron barrel calorimeter design with iron as absorber end scintillating tiles placed in planes perpendicular to the colliding beams. Its mechanical layout, component tests, scintillator properties, as well as the radiation hardeness are presented. Prototypes have been exposed to particle beams at the CERN/SPS, with energies ranging between 20 and 300 GeV. The results obtained without an EM compartement in front are very promising. Very preliminar results from the combined test with the electromagnetic Pb/LAr calorimeter in front show agreement with the stand-alone performance which indicate that TILECAL will achieve ATLAS requeriments. C1 AUTONOMOUS UNIV BARCELONA,BARCELONA,SPAIN. UNIV CHICAGO,CHICAGO,IL 60637. INST ATOM PHYS,R-76900 BUCHAREST,ROMANIA. UNIV CLERMONT FERRAND,F-63006 CLERMONT FERRAND,FRANCE. CERN,GENEVA,SWITZERLAND. JOINT INST NUCL RES,DUBNA,RUSSIA. UNIV ILLINOIS,CHICAGO,IL 60680. YEREVAN PHYS INST,YEREVAN,ARMENIA. LIP,LISBON,PORTUGAL. UNIV PISA,PISA,ITALY. CHARLES UNIV,PRAGUE,CZECH REPUBLIC. ACAD SCI CZECH REPUBL,PRAGUE,CZECH REPUBLIC. UNIV FED RIO DE JANEIRO,BR-21945 RIO JANEIRO,BRAZIL. IHEP,SERPUKHOV,RUSSIA. UNIV STOCKHOLM,STOCKHOLM,SWEDEN. IFIC,VALENTIA,SPAIN. RP Henriques, A (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 82 EP 87 PG 6 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400014 ER PT J AU Takai, H AF Takai, H TI Precision electromagnetic calorimetry with liquid krypton SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence ID PERFORMANCE AB Test beam results of a liquid krypton electromagnetic calorimeter with projective accordion electrode are presented. The electrode design includes it fine segmentation section to enhance the pi(0) rejection and pointing. The test was carried out at the H4 beam line at the CERN SPS with electron beams of energy from 20 to 200 GeV. Preliminary results of energy resolution, linearity, mu response are presented. We also present the dependence of the energy resolution on the amount of inactive material in front of the calorimeter. RP Takai, H (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Takai, Helio/C-3301-2012 OI Takai, Helio/0000-0001-9253-8307 NR 10 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 138 EP 144 PG 7 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400020 ER PT J AU Anderson, DF Kwan, S Sbarra, C AF Anderson, DF Kwan, S Sbarra, C TI Low-pressure micro-strip gas chamber and a search for a high-efficiency secondary-electron emitter SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence ID DIAMOND AB The test beam performance of a low-pressure micro-strip gas chamber with a thick CsI secondary-electron emitting surface as the source of primary ionization is presented. A study of the secondary-electron yield of CsI and KCI coated surfaces are discussed, as well as a promising new technique, CsI-treated CVD diamond films. C1 IST NAZL FIS NUCL,I-56010 PISA,ITALY. RP Anderson, DF (reprint author), FERMILAB NATL ACCELERATOR LAB,PARTICLE DETECTOR GRP,BATAVIA,IL 60510, USA. NR 21 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 213 EP 217 PG 5 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400032 ER PT J AU Acciarri, M Adam, A Adriani, O Ahlen, S Alcaraz, J Ambrosi, G Andreev, V Babucci, E Baksay, L Baschirotto, A Battiston, R Bay, A Bencze, GL Bertucci, B Biasini, M Bilei, GM Bobbink, GJ Brooks, ML Burger, WJ Busenitz, J Camps, C Caria, M Castellini, G Castello, R Checcucci, B Chen, A Choumilov, E Choutko, V Coan, TE Commichau, V DiBitonto, D Ding, D Dominguez, A Duinker, P Easo, S Extermann, P Fiandrini, E Gabbanini, A Goldstein, J Gougas, A Hangarter, K Hauviller, C Herve, A Hou, SR Josa, MI Kapustinsky, JS Kim, D Kinnison, WW Kornis, J Krastev, VR Ladron, P Landi, G Lebeau, M Lecomte, P Lee, DM Leiste, R Lejeune, E Levtchenko, P Lin, WT Lohmann, W Marin, A Mills, GB Nowak, H Passaleva, G Paul, T Pauluzzi, M Pensotti, S Perrin, E Pinto, JC Pohl, M Produit, N Rancoita, PG Rattaggi, M Sachwitz, M Santocchia, A Schmitz, P Schoneich, B Servoli, L Sopczak, A Tesi, M Tonisch, F Toth, J Trowitzsch, G Tuchscherer, H VanHoek, M Viertel, G Vogt, H Weill, R Xu, J Yeh, SC Zhou, B Zilizi, G AF Acciarri, M Adam, A Adriani, O Ahlen, S Alcaraz, J Ambrosi, G Andreev, V Babucci, E Baksay, L Baschirotto, A Battiston, R Bay, A Bencze, GL Bertucci, B Biasini, M Bilei, GM Bobbink, GJ Brooks, ML Burger, WJ Busenitz, J Camps, C Caria, M Castellini, G Castello, R Checcucci, B Chen, A Choumilov, E Choutko, V Coan, TE Commichau, V DiBitonto, D Ding, D Dominguez, A Duinker, P Easo, S Extermann, P Fiandrini, E Gabbanini, A Goldstein, J Gougas, A Hangarter, K Hauviller, C Herve, A Hou, SR Josa, MI Kapustinsky, JS Kim, D Kinnison, WW Kornis, J Krastev, VR Ladron, P Landi, G Lebeau, M Lecomte, P Lee, DM Leiste, R Lejeune, E Levtchenko, P Lin, WT Lohmann, W Marin, A Mills, GB Nowak, H Passaleva, G Paul, T Pauluzzi, M Pensotti, S Perrin, E Pinto, JC Pohl, M Produit, N Rancoita, PG Rattaggi, M Sachwitz, M Santocchia, A Schmitz, P Schoneich, B Servoli, L Sopczak, A Tesi, M Tonisch, F Toth, J Trowitzsch, G Tuchscherer, H VanHoek, M Viertel, G Vogt, H Weill, R Xu, J Yeh, SC Zhou, B Zilizi, G TI 1994 running experience with the L3 silicon microvertex detector SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence AB The 1994 running experience with the L3 Silicon Microvertex Detector is described; in particular we report on the detector performances observed during the year (namely the DAQ and detection efficiency and the signal to noise ratio) and on the reduction of the noise affecting the detector. C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY. NIKHEF, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. BOSTON UNIV, BOSTON, MA 02215 USA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV FLORENCE, I-50125 FLORENCE, ITALY. IST NAZL FIS NUCL, SEZ FIRENZE, I-50125 FLORENCE, ITALY. IST RIC ONDE ELETTROMAGNET, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. UNIV PERUGIA, I-06100 PERUGIA, ITALY. IST NAZL FIS NUCL, SEZ PERUGIA, I-06100 PERUGIA, ITALY. NATL CENT UNIV, CHUNGLI 32054, TAIWAN. NATL TSING HUA UNIV, HSINCHU, TAIWAN. UNIV ALABAMA, TUSCALOOSA, AL 35486 USA. DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY. ETH ZURICH, CH-8093 ZURICH, SWITZERLAND. INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA. UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA. CTR INVEST ENERGET MEDIOAMBIENTALES & TECHNOL, E-28040 MADRID, SPAIN. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. RP IST NAZL FIS NUCL, SEZ MILANO, I-20133 MILAN, ITALY. RI Fiandrini, Emanuele/C-4549-2008; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Josa, Isabel/K-5184-2014; Rancoita, Pier Giorgio/J-9896-2015; OI Servoli, Leonello/0000-0003-1725-9185; Rancoita, Pier Giorgio/0000-0002-1990-4283; Ambrosi, Giovanni/0000-0001-6977-9559; Castellini, Guido/0000-0002-0177-0643; Bertucci, Bruna/0000-0001-7584-293X; Goldstein, Joel/0000-0003-1591-6014 NR 10 TC 0 Z9 0 U1 0 U2 1 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 NOV PY 1995 SU 44 BP 296 EP 302 DI 10.1016/S0920-5632(95)80047-6 PG 7 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400047 ER PT J AU Adams, D Adams, M Baumbaugh, B Bertram, I Bross, A Casey, D Chang, S Chung, M Cooper, C Cretsinger, C Demina, R Fanourakis, G Grunendahl, S Hinson, J Howell, B Johari, H Kang, JS Kim, CL Kim, SK Koltick, D Lobkowicz, F Margulies, S Moromisato, J Narain, M Park, CH Park, YM Reucroft, S Ruchti, R Solomon, J VonGoeler, E Warchol, J Wayne, M Won, E Yu, Y AF Adams, D Adams, M Baumbaugh, B Bertram, I Bross, A Casey, D Chang, S Chung, M Cooper, C Cretsinger, C Demina, R Fanourakis, G Grunendahl, S Hinson, J Howell, B Johari, H Kang, JS Kim, CL Kim, SK Koltick, D Lobkowicz, F Margulies, S Moromisato, J Narain, M Park, CH Park, YM Reucroft, S Ruchti, R Solomon, J VonGoeler, E Warchol, J Wayne, M Won, E Yu, Y TI Cosmic ray test results of the D0 prototype scintillating fiber tracker SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence AB The performance of a large scale scintillating fiber tracker with VLPC readout has been studied in a cosmic-ray test. Approximately 9.6 photoelectrons per single layer per trigger were detected at a VLPC bias voltage of 6.5V. The doublet efficiency was nearly 100% at a 0.1% noise level and a position resolution of about 140 mu m was measured. We also studied the relationship between VLPC performance and VLPC bias voltage by measuring single fiber efficiency as a function of VLPC bias in the range 6.2V to 7.0V at a fixed temperature of 6.5 degrees K. We observed no significant variation in VLPC performance within this bias range. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ILLINOIS,CHICAGO,IL 60680. KOREA UNIV,SEOUL 136701,SOUTH KOREA. KYUNGSUNG UNIV,PUSAN 608736,SOUTH KOREA. NORTHEASTERN UNIV,BOSTON,MA 02115. UNIV NOTRE DAME,NOTRE DAME,IN 46556. PURDUE UNIV,LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. SEOUL NATL UNIV,SEOUL 151742,SOUTH KOREA. RP Adams, D (reprint author), RICE UNIV,HOUSTON,TX 77251, USA. RI Kim, Sun Kee/G-2042-2015 OI Kim, Sun Kee/0000-0002-0013-0775 NR 8 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 332 EP 339 PG 8 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400052 ER PT J AU Kadyk, J Wise, J AF Kadyk, J Wise, J TI Wire aging studies: CF4/isobutane and helium-based gas mixtures SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence ID TESTS AB Wire aging has been studied for two types of gas mixtures: a) CF4/isobutane (isobutane is abbreviated here as iC(4)H(10)), and b) five different helium-based gases. Accelerated aging tests were performed using small proportional counters and Fe-55 sources. The concentration of CF4 was varied between zero and 100%, and over that range there were observed two distinct regions of etching (no aging), and two regions of deposition (aging) on the anode wire. A four-part model is presented that explains the presence of these windows of aging and etching in terms of known processes of plasma chemistry. It was also found that non-gold-plated wire is chemically attacked and ages rapidly, and that operation with CF4 alone results in rapid cathode aging. In a different investigation, the aging rates of five helium-based gas micxtures were measured: 1)He/ethane (50/50), 2)He/ethane (95/5), 3)He/propane (70/30), 4)He/isobutane (80/20), and 5)He/CO2/isobutane (78/15/7). The first and last of these mixtures were found to have aging rates of about 30%/C/cm, while the other three mixtures gave aging rates consistent with zero. Some of the techniques and results described here have been reported previously [1,2]. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP Kadyk, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV PHYS,BERKELEY,CA 94720, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 567 EP 576 PG 10 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400087 ER PT J AU Neoustroev, P Stepanov, V Svoiski, M Uvarov, L Matthew, P Russ, J Cooper, P AF Neoustroev, P Stepanov, V Svoiski, M Uvarov, L Matthew, P Russ, J Cooper, P TI A fastbus-based silicon strip readout system SO NUCLEAR PHYSICS B LA English DT Article; Proceedings Paper CT 4th International Conference on Advanced Technology and Particle Physics CY OCT 03-07, 1994 CL COMO, ITALY SP European Phys Soc, Ist Nazl Fis Nucl, Univ Florence C1 CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP Neoustroev, P (reprint author), PETERSBURG NUCL PHYS INST,ST PETERSBURG,RUSSIA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD NOV PY 1995 SU 44 BP 583 EP 586 PG 4 WC Physics, Particles & Fields SC Physics GA TL034 UT WOS:A1995TL03400089 ER PT J AU YANG, WS AF YANG, WS TI RESPONSE MATRIX PROPERTIES AND CONVERGENCE IMPLICATIONS FOR AN INTERFACE-CURRENT NODAL FORMULATION SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID HEXAGONAL GEOMETRY; REACTOR CALCULATIONS; EXPANSION METHOD; DIFFUSION CODE; TRANSPORT; EQUATIONS AB An analytic study was performed of the properties and the associated convergence implications of the response matrix equations derived via the widely used nodal expansion method. By using the DIF3D nodal formulation in hexagonal-z geometry as a concrete example, an analytic expression for the response matrix is first derived by using the hexagonal prism symmetry transformations. The spectral radius of the local response matrix is shown to be always <1. The l(2)-norm of the response matrix is shown to be <1 in two-dimensional problems but not always <1 in three-dimensional problems. The elements of the response matrix are shown to not always be positive, and the l(infinity)-norm is not always <1. The spectral radius and the l(2)- and l(infinity)-norms of the response matrix are found to increase as the removal cross section decreases. On the other hand, for a given removal cross section, each of these matrix norms takes its minimum at a certain diffusion coefficient and increases as the diffusion coefficient deviates from this value. Based on these matrix norms, sufficient conditions for the convergence of the iteration schemes for solving the response matrix equations are discussed. The range of node-height-to-hexagon-pitch ratios that guarantees a positive solution is derived as a function of the diffusion coefficient and the removal cross section. C1 ARGONNE NATL LAB,DIV REACTOR ANAL,ARGONNE,IL 60439. OI Yang, Won Sik/0000-0003-0734-6023 NR 31 TC 3 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD NOV PY 1995 VL 121 IS 3 BP 416 EP 432 PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TB881 UT WOS:A1995TB88100005 ER PT J AU KHAN, HJ CHENG, HS ROHATGI, US AF KHAN, HJ CHENG, HS ROHATGI, US TI MITIGATION OF AN ANTICIPATED TRANSIENT WITHOUT SCRAM EVENT IN A SIMPLIFIED BOILING WATER-REACTOR BY THE INSERTION OF FINE-MOTION CONTROL RODS SO NUCLEAR TECHNOLOGY LA English DT Article AB Analysis has been performed for an anticipated transient without scram (ATWS) event in a simplified boiling water reactor. Loss of feedwater heating initiated this ATWS, which was mitigated by the insertion of fine-motion control rods. Calculations with RAMONA-4B code show that reactivity insertion, through increase in subcooling to the core, results in a rise in the core power to a new equilibrium condition. Insertion of fine-motion control rods from rite bottom of the core is found to shift the peak of the axial power distribution to the upper part of the core until eventual shutdown of the reactor occurs. RP KHAN, HJ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD NOV PY 1995 VL 112 IS 2 BP 155 EP 168 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TD087 UT WOS:A1995TD08700001 ER PT J AU MADNI, IK AF MADNI, IK TI INDEPENDENT ASSESSMENT OF MELCOR AS A SEVERE ACCIDENT THERMAL-HYDRAULIC SOURCE-TERM ANALYSIS TOOL SO NUCLEAR TECHNOLOGY LA English DT Article AB MELCOR is a fully integrated computer code that models all phases of the progression of severe accidents in light water reactor (LWR) nuclear power plants and is being developed for the U.S. Nuclear Regulatory Commission (NRC) by Sandia National Laboratories. Brookhaven National Laboratory (BNL) has a program with the NRC called ''MELCOR Verification, Benchmarking, and Applications,'' the aim of which is to provide independent assessment of MELCOR as a severe accident thermal-hydraulic/source term analysis tool. The scope of this program is to perform quality control verification on all released versions of MELCOR, to benchmark MELCOR against more mechanistic codes and experimental data from severe fuel damage tests, and to evaluate the ability of MELCOR to simulate long-term severe accident transients in commercial LWRs, by applying the code to model both boiling water reactors and pressurized wafer reactors. Under this program, BNL provided input to the NRC-sponsored MELCOR Peer Review and is currently contributing to the MELCOR Cooperative Assessment Program (MCAP). A summary of MELCOR assessment efforts at BNL and their contribution to NRC goals with respect to MELCOR is presented. RP MADNI, IK (reprint author), BROOKHAVEN NATL LAB,DEPT ADV TECHNOL,DIV SAFETY & RISK EVALUAT,BLDG 130,POB 5000,UPTON,NY 11973, USA. NR 24 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD NOV PY 1995 VL 112 IS 2 BP 169 EP 180 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TD087 UT WOS:A1995TD08700002 ER PT J AU MILLER, AI SPAGNOLO, DA DEVORE, JR AF MILLER, AI SPAGNOLO, DA DEVORE, JR TI CHOICE OF A PROCESS DESIGN FOR SIMULTANEOUS DETRITIATION AND UPGRADING OF HEAVY-WATER FOR THE ADVANCED NEUTRON SOURCE SO NUCLEAR TECHNOLOGY LA English DT Article AB Tritium removal and heavy water upgrading are essential components of the heavy water-moderated reactor that is the heart of the Advanced Neutron Source (ANS) to be built at Oak Ridge National Laboratory. The technologies for these two processes, which are closely related, are reviewed in the context of the ANS requirements. The evolution of the design of the Heavy Water Upgrading and Detritiation Facility (HWUDF) for ANS is outlined, and the final conceptual design is presented. The conceptual design of HWUDF has two main component systems: (a) a front-end combined electrolysis and catalytic exchange (CECE) system and (b) a back-end cryogenic distillation (CD) system. The CECE process consists of a countercurrent exchange column for hydrogen-water exchange over a wetproofed catalyst and electrolysis to convert water into hydrogen. It accepts all the tritiated heavy water streams of the reactor and performs an almost total separation into a protium (light hydrogen) stream containing tritium and deuterium at only natural abundance and a deuterium stream containing all the tritium and almost no protium. The tritium-containing deuterium stream is then processed by a CD unit, which removes over 90% of the tritium and concentrates it to >99% tritium for indefinite storage as a metal tritide. Deuterium gas with a small residue of tritium is recombined with oxygen from the electrolytic cells and returned as heavy water to the reactor. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP MILLER, AI (reprint author), AECL RES,CHALK RIVER LABS,CHALK RIVER,ON K0J 1J0,CANADA. NR 14 TC 1 Z9 3 U1 1 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD NOV PY 1995 VL 112 IS 2 BP 204 EP 213 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TD087 UT WOS:A1995TD08700005 ER PT J AU MANKAMO, T KIM, IS SAMANTA, PK AF MANKAMO, T KIM, IS SAMANTA, PK TI PROBABILISTIC ANALYSIS OF LIMITING CONDITIONS FOR OPERATION ACTION REQUIREMENTS INCLUDING RISK OF SHUTDOWN SO NUCLEAR TECHNOLOGY LA English DT Article AB When the systems needed to shut down a nuclear power plant are inoperable or degraded, the risk of shutting down the plant may be comparable to, or even higher than, that of continuing power operation with the equipment inoperable but giving priority to repairs. This concern arises because the plant may have insufficient capability for removing decay heat during the shutdown. However in many cases, plant technical specifications require immediate shutdown of the plant. Risk-based analyses for various alternatives of operational policy available in such situations are examined. These analyses can be used to define the risk-effective requirements for those standby safety systems. C1 BROOKHAVEN NATL LAB,DEPT ADV TECHNOL,UPTON,NY 11973. RP MANKAMO, T (reprint author), AVAPLAN OY,ITAINEN RANTATIE 17,SF-02230 ESPOO,FINLAND. NR 13 TC 1 Z9 1 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD NOV PY 1995 VL 112 IS 2 BP 250 EP 265 PG 16 WC Nuclear Science & Technology SC Nuclear Science & Technology GA TD087 UT WOS:A1995TD08700009 ER PT J AU GRITZO, LA NICOLETTE, VF AF GRITZO, LA NICOLETTE, VF TI COUPLED THERMAL RESPONSE OF OBJECTS AND PARTICIPATING MEDIA IN FIRES AND LARGE COMBUSTION SYSTEMS SO NUMERICAL HEAT TRANSFER PART A-APPLICATIONS LA English DT Article ID FLAMES AB When an object is subjected to a flowing, participating medium at a different temperature, such as a flame, the thermal response of the object and the surrounding medium becomes coupled. The differences inherent in treating the medium as a blackbody at some approximate temperature as opposed to a participating medium are assessed and quantified in this work by solving the transient, coupled, radiation, and conduction heat transfer problem for the flow of an absorbing and emitting medium adjacent to a vertical flat plate. The results are presented in terms of nondimensional parameters and include both average and local heat fluxes as a function of time. Early in the transient, a reduction in net heat flux of up to 65% was observed by accounting for absorption and emission in the medium. Accordingly, a longer time is required for the object to reach an equilibrium temperature (Icp to 100% for values of the radiation parameter, N-rad, of 5.0) than is predicted using the blackbody assumption. For radiation Blot numbers greater than 5 or values of N-rad less than 10(-2), the differences inherent in the two approaches are negligible, and the blackbody assumption is valid. RP GRITZO, LA (reprint author), SANDIA NATL LABS,DEPT THERMAL & FLUID ENGN 1513,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 12 TC 6 Z9 6 U1 0 U2 1 PU HEMISPHERE PUBL CORP PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 1040-7782 J9 NUMER HEAT TR A-APPL JI Numer. Heat Tranf. A-Appl. PD NOV PY 1995 VL 28 IS 5 BP 531 EP 545 DI 10.1080/10407789508913760 PG 15 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA TF602 UT WOS:A1995TF60200002 ER PT J AU White, DC AF White, DC TI Chemical ecology: Possible linkage between macro- and microbial ecology SO OIKOS LA English DT Article ID POLY-BETA-HYDROXYBUTYRATE; HYDROXY FATTY-ACIDS; ANTARCTIC SEA-ICE; DETRITAL MICROBIOTA; COMMUNITY STRUCTURE; BIOMASS; SEDIMENTS; BACTERIA; TRANS; MASS AB Microbes are often the largest biomass in an ecosystem, yet are not often considered in classical ecology. Problems with the study of the ecology of microbes come from the difficulties in applying the isolation and culture techniques that were so successful in medical studies but are not effective in the environment. Most environmental microbes simply will not grow in culture. The problem of assessing the impact of microbes on ecosystems is further complicated as the most significant impact of a microbial community on an ecosystem is the result of metabolic activities. Inactive microbes can be a food source, but the biogeochemical metabolism of the active microbes have the greatest impact on the environment. In stable soils and sediments, only a tiny proportion of the potential metabolic capacity and versatility of that community is being actively expressed at a given time. Microbes in these environments are poised to rapidly take advantage of nutrients that become available following a disturbance. This dramatic reaction to disturbance makes measuring the metabolic activity of microbes in undisturbed soil a significant challenge. Heterogeneity on the scale of the microbes in the distribution of nutrients, carbon sources, water, ions, or terminal electron accepters in soils is a significant complication. The assumptions of colligative properties of solutions for soil environments in the estimations of kinetics is one of the reasons that engineers have so much trouble making successful models for in situ bioremediation in these heterogeneous soils and sediments. How then, can soil microbial community ecology be approached? The hypothesis that many of the responses of monocultures of microbes to specific conditions will predict the responses of these organisms to specific conditions in the soil community seems to hold true. This theory is being tested using genetically engineered microbes with ''reporters'' in biofilms and can be examined in soils, if the analysis does not apply selective pressures that can distort the in situ conditions. The knowledge of physiological responses of monocultures, and the structural modifications they produce, provides a mechanism to predict the responses of a community to specific change. In characterizing the microbial community in situ, there are advantages to analyzing lipid membranes, because all viable cells are enclosed in lipid membranes containing polar lipids. If specific organisms have sufficiently unusual lipids in their membranes then these lipids can serve as ''signatures'' to define the community structure. If there are specific conditions that result in structural modifications of the lipids, then the detection of these modifications can be utilized to define the ecology of the microniche of that organism and thus of at least a portion of the microbial community. This gives insight into the microbes' nutritional/physiological status and the suitability of the local environment. The presence of polar lipids can define the viable biomass, as no cell can function without an intact membrane which contains polar lipids. The activation of endogenous phospholipase activity with cell death can leave traces of the recent lysis in the diglyceride structure. The detection of specific genes can define the Limits of adaptation but not always reflect current metabolic activity. That most complex ecosystem with the most diverse biota and versatile biochemistry, soil, is finally approachable on both a holistic and utterly reductionest scale, thanks in large measure to the prescient insight of Per Brinck who introduced Chemical Ecology to Lund University and the rest of the world. RP White, DC (reprint author), UNIV TENNESSEE,OAK RIDGE NATL LAB,DIV ENVIRONM SCI,CTR ENVIRONM BIOTECHNOL,10515 RES DR,KNOXVILLE,TN 37932, USA. NR 46 TC 24 Z9 26 U1 1 U2 10 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0030-1299 J9 OIKOS JI Oikos PD NOV PY 1995 VL 74 IS 2 BP 177 EP 184 DI 10.2307/3545646 PG 8 WC Ecology SC Environmental Sciences & Ecology GA TP525 UT WOS:A1995TP52500001 ER PT J AU Escos, JM Alados, CL Emlen, JM AF Escos, JM Alados, CL Emlen, JM TI Fractal structures and fractal functions as disease indicators SO OIKOS LA English DT Article ID STRESS; PHYSIOLOGY; DIMENSIONS; PATTERN; SUTURES AB Developmental instability is an early indicator of stress, and has been used to monitor the impacts of human disturbance on natural ecosystems. Here we investigate the use of different measures of developmental instability on two species, green peppers (Capsicum annuum), a plant, and Spanish ibex (Capra pyrenaica), an animal. For green peppers we compared the variance in allometric relationship between control plants, and a treatment group infected with the tomato spotted wilt virus. The results show that infected plants have a greater variance about the allometric regression line than the control plants. We also observed a reduction in complexity of branch structure in green pepper with a viral infection. Box-counting fractal dimension of branch architecture declined under stress infection. We also tested the reduction in complexity of behavioral patterns under stress situations in Spanish ibex (Capra pyrenaica). Fractal dimension of head-lift frequency distribution measures predator detection efficiency. This dimension decreased under stressful conditions, such as advanced pregnancy and parasitic infection. Feeding distribution activities reflect food searching efficiency. Power spectral analysis proves to be the most powerful tool for characterizing fractal behavior, revealing a reduction in complexity of time distribution activity under parasitic infection. C1 PACIFIC NW NAT SCI CTR,NBS,NAVAL STN,SEATTLE,WA 98115. RP Escos, JM (reprint author), CSIC,INST PIRENAICO ECOL,AVDA MONTANANA 177,APTDO 202,E-50080 ZARAGOZA,SPAIN. RI Alados, Concepcion/K-8085-2014; Escos, Juan/L-4207-2014 OI Alados, Concepcion/0000-0002-6227-861X; Escos, Juan/0000-0003-2852-2911 NR 30 TC 41 Z9 41 U1 0 U2 7 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0030-1299 J9 OIKOS JI Oikos PD NOV PY 1995 VL 74 IS 2 BP 310 EP 314 DI 10.2307/3545661 PG 5 WC Ecology SC Environmental Sciences & Ecology GA TP525 UT WOS:A1995TP52500016 ER PT J AU CHURCH, EL TAKACS, PZ AF CHURCH, EL TAKACS, PZ TI SPECIFICATION OF GLANCING-INCIDENCE AND NORMAL-INCIDENCE X-RAY MIRRORS (VOL 34, PG 353, 1995) SO OPTICAL ENGINEERING LA English DT Correction, Addition RP CHURCH, EL (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 1 TC 1 Z9 1 U1 2 U2 4 PU SOC PHOTO-OPT INSTRUM ENG PI BELLINGHAM PA PO BOX 10, BELLINGHAM, WA 98227-0010 SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD NOV PY 1995 VL 34 IS 11 BP 3348 EP 3348 PG 1 WC Optics SC Optics GA TF307 UT WOS:A1995TF30700039 ER PT J AU WEGNER, PJ FEIT, MD AF WEGNER, PJ FEIT, MD TI CHARACTERIZATION AND SUPPRESSION OF SELF-PHASE MODULATION IN A COMMERCIAL MODELOCKED AND Q-SWITCHED ND-YLF OSCILLATOR SO OPTICS COMMUNICATIONS LA English DT Article ID PHOSPHATE-GLASS-LASER; SOLID-STATE LASERS; PULSE-COMPRESSION; MODE-LOCKING; SPECTRAL DEVELOPMENT; STABLE RESONATORS; STABILITY; LENS AB Spectral broadening up to 20 GHz has been measured in the pulsed output of a commercial actively-modelocked and Q-switched Nd:YLF oscillator operating at a modelocked pulse duration of 150 ps. The source of the broadening is self-phase modulation occurring in the acousto-optic modulators, as confirmed by modeling which has reproduced the observed spectra. With the CW lamp-pumped oscillator redesigned for a large mode volume in the modulators, the self-phase modulation is suppressed and near-transform-limited bandwidths at pulse durations of 85 ps are measured. RP WEGNER, PJ (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,LIVERMORE,CA 94550, USA. RI Feit, Michael/A-4480-2009 NR 44 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD NOV 1 PY 1995 VL 120 IS 5-6 BP 358 EP 368 DI 10.1016/0030-4018(95)00363-D PG 11 WC Optics SC Optics GA TB700 UT WOS:A1995TB70000023 ER PT J AU DEAZEVEDO, CG BOESE, R NEWMAN, DA VOLLHARDT, KPC AF DEAZEVEDO, CG BOESE, R NEWMAN, DA VOLLHARDT, KPC TI SYNTHESIS OF THE QUATERCYCLOPENTADIENYL LIGAND AND ITS HALF-SANDWICH TETRATUNGSTEN COMPLEXES SO ORGANOMETALLICS LA English DT Note ID M = MO; TRINUCLEAR COMPLEXES; BRIDGING LIGANDS; METAL; CARBONYL; ELECTROCHEMISTRY; COBALT AB Double 3-oxocyclopentenylation of the fulvalene dianion, followed by metalation, results in the four isomeric bis(enones) 1 which were elaborated via the bis(cyclopentadienes) 2 to the four regio- and stereoisomeric forms of(quatercyclopentadienyl)tetratungsten (connectivity 1,1',2',1 '',3 '', 1''' (3a,b and 4a,b) and 1,1',3',1 '',3 '',1''' (3c,d and 4c,d)). The molecular structures of la and Ib have been determined by X-ray analysis. The tetramethyl complex 5 is obtained from 2d by a metalation-methylation sequence involving deprotonation of the intermediate bis(tungsten hydride) with K+((OC)-O--(CH3)(3)). C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV ESSEN GESAMTHSCH,INST ANORGAN CHEM,D-45117 ESSEN,GERMANY. INST SUPER TECN,CTR QUIM ESTRUTURAL,P-1096 LISBON,PORTUGAL. RI Azevedo, Cristina/H-7773-2012 OI Azevedo, Cristina/0000-0003-1818-1308 NR 33 TC 21 Z9 21 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD NOV PY 1995 VL 14 IS 11 BP 4980 EP 4982 DI 10.1021/om00011a005 PG 3 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA TE434 UT WOS:A1995TE43400005 ER PT J AU MATTOR, N WILLIAMS, TJ HEWETT, DW AF MATTOR, N WILLIAMS, TJ HEWETT, DW TI ALGORITHM FOR SOLVING TRIDIAGONAL MATRIX PROBLEMS IN PARALLEL SO PARALLEL COMPUTING LA English DT Article DE TRIDIAGONAL SYSTEMS; LINEAR ALGEBRA; DISTRIBUTED MEMORY MULTIPROCESSOR; BANDED DIAGONAL MATRIX; INTERPROCESSOR COMMUNICATION AB A new algorithm is presented, designed to solve tridiagonal matrix problems efficiently with parallel computers (multiple instruction stream, multiple data stream (MIMD) machines with distributed memory). The algorithm is designed to be extendable to higher order banded diagonal systems. RP MATTOR, N (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 7 TC 35 Z9 35 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8191 J9 PARALLEL COMPUT JI Parallel Comput. PD NOV PY 1995 VL 21 IS 11 BP 1769 EP 1782 DI 10.1016/0167-8191(95)00033-0 PG 14 WC Computer Science, Theory & Methods SC Computer Science GA TK091 UT WOS:A1995TK09100003 ER PT J AU OSBOURN, GC MARTINEZ, RF AF OSBOURN, GC MARTINEZ, RF TI EMPIRICALLY DEFINED REGIONS OF INFLUENCE FOR CLUSTERING ANALYSES SO PATTERN RECOGNITION LA English DT Article ID RELATIVE NEIGHBORHOOD GRAPH AB We present a simple but effective clustering algorithm for non-hierarchical k-dimensional data which is also useful for pattern recognition applications. The method uses a visually-empirical region of influence (VERI) that we have discovered. Our approach enables us to use human cluster judgments as the cluster criteria, and to extend these criteria in a natural way to k-dimensional data. The VERI algorithm requires no user input (e.g. the number of clusters in the final result) or user adjustments beyond providing the data itself. The algorithm computes clusterings based on the local k-dimensional neighbors of each point, and thus handles arbitrary numbers of clusters and arbitrary global cluster shapes. We demonstrate that the method works well for a variety of 2D cluster configurations which popular methods cannot treat (despite requiring the number of clusters as input), and illustrate that the performance is maintained for k-dimensional problems. The application of the method to pattern recognition problems is outlined, and efficient implementations of the VERI algorithm are presented. RP OSBOURN, GC (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 20 TC 25 Z9 26 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0031-3203 J9 PATTERN RECOGN JI Pattern Recognit. PD NOV PY 1995 VL 28 IS 11 BP 1793 EP 1806 DI 10.1016/0031-3203(95)00032-U PG 14 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA TH022 UT WOS:A1995TH02200014 ER PT J AU LAMBERTH, C AF LAMBERTH, C TI FIRST SYNTHESIS OF 5'-DIMETHYLARSINYLOXY NUCLEOSIDES SO PHARMAZIE LA English DT Note ID ARSENIC-CONTAINING NUCLEOSIDE; TRIDACNA-MAXIMA; GIANT CLAM; IDENTIFICATION; KIDNEY C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 14 TC 0 Z9 0 U1 0 U2 0 PU GOVI-VERLAG GMBH PI ESCHBORN PA PHARMAZEUTISCHER VERLAG GINNHEIMER STRASSE 26, D-65760 ESCHBORN, GERMANY SN 0031-7144 J9 PHARMAZIE JI Pharmazie PD NOV PY 1995 VL 50 IS 11 BP 768 EP 768 PG 1 WC Chemistry, Medicinal; Chemistry, Multidisciplinary; Pharmacology & Pharmacy SC Pharmacology & Pharmacy; Chemistry GA TE289 UT WOS:A1995TE28900017 ER PT J AU ZHOU, DS MITCHELL, TE AF ZHOU, DS MITCHELL, TE TI ROTATION DOMAINS IN ALPHA-SILICON NITRIDE SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article AB A domain structure is abundant in as-grown chemically vapour-deposited alpha-Si3N4 crystals. Transmission electron microscopy has been employed to examine the nature of the domains and domain boundaries. Selected-area electron diffraction patterns taken from either side of the domain walls are essentially the same, but sometimes different convergent-beam electron diffraction patterns and image contrast are observed. They are not simple stacking faults or antiphase domain boundaries or inversion boundaries. Analysis shows that they are 60 degrees rotation domains which can occur because the structure has threefold rotational symmetry instead of sixfold along the c axis of the trigonal unit cell. The domain boundaries often lie on low-index planes but can be curved and occur on any plane. Sometimes they give a stacking-fault-like contrast. C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. NR 15 TC 5 Z9 5 U1 0 U2 2 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD NOV PY 1995 VL 72 IS 5 BP 1131 EP 1140 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA TF648 UT WOS:A1995TF64800001 ER PT J AU JIN, Z BIELER, TR AF JIN, Z BIELER, TR TI A NUMERICAL FORCE AND STRESS-ANALYSIS ON A THIN TWIN LAYER IN TIAL SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID HCP METALS; COMPUTER-SIMULATION; DISLOCATIONS; DISSOCIATION; SILICON; ALLOYS AB Distributions of forces and stresses along a thin twin layer in TiAl that was qualitatively described in a related paper were analysed using the experimentally measured locations of twinning dislocations in the thin twin layer. The results show that both the forward stress and the back stress are very large at the twin tip and they drop quickly as the distance from the twin tip increases. The forward stress and the back stress are equal to 1140 MPa and 1200 MPa respectively on the first twinning dislocation and 275 MPa and 300 MPa respectively on the sixteenth twinning dislocation. The external stress is found to be the residual stress in the matrix and it is uniformly distributed along the thin twin layer. The magnitude of residual stress is about 50 MPa. The internal friction stress on the first twinning dislocation is very large, near 765 MPa, but the internal friction stress on the second twinning dislocation is lower than on any twinning dislocations behind it. The high internal friction stress on the first twinning dislocation is due to a compressive stress normal to the twinning plane and a tensile stress in the twinning direction within the core of the first twinning dislocation besides the core structural change in the first twinning dislocation. A high stress concentration at a twin tip is an intrinsic property of a growing twin layer, but the stress concentration for an unblocked twin has an upper limit, which is equal to 1200 MPa in this study. The results are discussed and compared with models for twins in the literature. C1 MICHIGAN STATE UNIV,DEPT MECH & MAT SCI,E LANSING,MI 48824. RP JIN, Z (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,MS G755,LOS ALAMOS,NM 87545, USA. NR 26 TC 22 Z9 22 U1 1 U2 5 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD NOV PY 1995 VL 72 IS 5 BP 1201 EP 1219 PG 19 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA TF648 UT WOS:A1995TF64800006 ER PT J AU CHEN, CL TSONG, TT AF CHEN, CL TSONG, TT TI ATOMIC-STRUCTURE OF A RHENIUM MONOLAYER ON THE W(112) SURFACE SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID FIELD-ION-MICROSCOPE; EXCHANGE MECHANISM; SINGLE ADATOMS; SELF-DIFFUSION; ADSORPTION; W(211); IRIDIUM; RE AB Deposition of one monolayer of rhenium on the W(112) surface and subsequent annealing to 820 K results in the formation of an ordered (1 x 2) superstructure of rhenium. The superstructure is stable in ultra-high vacuum even at 1000 K. An atom-probe analysis indicates no formation of a surface alloy layer up to 1000 K. Thus the interface remains atomically sharp. C1 ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN. RP CHEN, CL (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. NR 34 TC 2 Z9 2 U1 0 U2 4 PU TAYLOR & FRANCIS LTD LONDON PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD NOV PY 1995 VL 72 IS 5 BP 285 EP 290 DI 10.1080/09500839508242465 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA TG436 UT WOS:A1995TG43600003 ER PT J AU COWEN, DJ JENSEN, JR BRESNAHAN, PJ EHLER, GB GRAVES, D HUANG, XQ WIESNER, C MACKEY, HE AF COWEN, DJ JENSEN, JR BRESNAHAN, PJ EHLER, GB GRAVES, D HUANG, XQ WIESNER, C MACKEY, HE TI THE DESIGN AND IMPLEMENTATION OF AN INTEGRATED GEOGRAPHIC INFORMATION-SYSTEM FOR ENVIRONMENTAL APPLICATIONS SO PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING LA English DT Article ID GIS AB Environmental monitoring and restoration at the U.S. Department of Energy's Savannah River Site (SRS) requires efficient access to large amounts of diverse spatial information. These geographic information system (GIS) and remotely sensed data are related to both physical and man-made features. In order to handle this task, the Environmental Sciences Section (ESS) of the Westinghouse Savannah River Company (WSRC) created the Environmental Data Atlas (EDA) that uses spatial keys to link all data sources to a common geographical data base. Furthermore, it was important that all of the data be readily accessible on the desktop of scientists regardless of the type of computer platform they used. This paper describes the creation of a comprehensive computing environment that utilizes a geographical data browsing system as the core for meeting these requirements. It also describes how bibliographic search and aerial photography browsing functions were incorporated into the system. Finally, it describes a sophisticated modeling system that has been integrated into the system to support site selection activities. By taking advantage of the latest advancements in geographical data browsing systems, fourth generation procedural programming languages, and network communications, the integrated system represents an important step in the evolution of GIS. C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,AIKEN,SC 29808. RP COWEN, DJ (reprint author), UNIV S CAROLINA,DEPT GEOG,COLUMBIA,SC 29208, USA. NR 48 TC 31 Z9 32 U1 1 U2 2 PU AMER SOC PHOTOGRAMMETRY PI BETHESDA PA 5410 GROSVENOR LANE SUITE 210, BETHESDA, MD 20814-2160 SN 0099-1112 J9 PHOTOGRAMM ENG REM S JI Photogramm. Eng. Remote Sens. PD NOV PY 1995 VL 61 IS 11 BP 1393 EP 1404 PG 12 WC Geography, Physical; Geosciences, Multidisciplinary; Remote Sensing; Imaging Science & Photographic Technology SC Physical Geography; Geology; Remote Sensing; Imaging Science & Photographic Technology GA TC375 UT WOS:A1995TC37500009 ER PT J AU CANFIELD, PC CHO, BK DENNIS, KW AF CANFIELD, PC CHO, BK DENNIS, KW TI MAGNETIC-PROPERTIES OF SINGLE-CRYSTAL GDNI2B2C SO PHYSICA B LA English DT Article AB Single crystals of GdNi2B2C have been grown out of Ni2B flux at high temperatures. Temperature and field dependent magnetization measurements on these crystals show that in low fields (1 kG) there are two phase transitions: at 20 K there is a paramagnetic to antiferromagnetic phase transition and at 14 K there is another transition which we infer to be a spin reorientation transition. The lower temperature transition manifests itself clearly in the anisotropic magnetization data, but is effectively averaged out in measurements of a powdered sample as well as in the polycrystalline average of the anisotropic magnetization data. Both of these transitions are also conspicuous in the temperature dependent electrical resistivity. GdB2C2 single crystals were also grown out of Ni2B flux. This compound has an antiferromagnetic phase transition at 47 K and is very likely an impurity phase responsible for the earlier, spurious, report of a 45 K phase transition in GdNi2B2C. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP CANFIELD, PC (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Canfield, Paul/H-2698-2014 NR 25 TC 51 Z9 51 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD NOV PY 1995 VL 215 IS 4 BP 337 EP 343 DI 10.1016/0921-4526(95)00421-2 PG 7 WC Physics, Condensed Matter SC Physics GA TG786 UT WOS:A1995TG78600008 ER PT J AU KIM, YC THOMPSON, JR CHRISTEN, DK PARANTHAMAN, M SPECHT, ED AF KIM, YC THOMPSON, JR CHRISTEN, DK PARANTHAMAN, M SPECHT, ED TI ENHANCED IRREVERSIBILITY FIELD AND CURRENT STABILIZATION BY PB SUBSTITUTION IN ALIGNED TL-1223 HIGH-T-C SUPERCONDUCTOR SO PHYSICA C LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; FLUX-CREEP; CURRENT-DENSITY; O CRYSTALS; TLBA2CA2CU3OZ; DEPENDENCE; SYSTEMS; FILMS AB Using magnetic methods, we have studied the effects of Pb substitution on the irreversibility line and other features of c-axis aligned Tl based cuprate superconductors with the ''1223'' structure, Specifically, the properties of (Tl0.5Pb0.5)Sr2Ca2Cu3O9 are compared with those of grain-aligned TlBa2Ca2Cu3O9 and Tl(Ba-Sr)(2)Ca2Cu3O9 materials. The irreversibility line H-irr(T) is notably higher for the Pb substituted material(similar to 1.7 T at 77 K with H parallel to c) and markedly anisotropic for all of the samples, Also, results for the persistent current density are reported, Flux-creep studies of the current-decay rate show that the current is the most stable in the aligned (Tl0.5Pb0.5)Sr2Ca2Cu3O9, and that the decay rate of all three materials increases monotonically as the temperature increases. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI Specht, Eliot/A-5654-2009; Paranthaman, Mariappan/N-3866-2015 OI Specht, Eliot/0000-0002-3191-2163; Paranthaman, Mariappan/0000-0003-3009-8531 NR 39 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD NOV 1 PY 1995 VL 253 IS 3-4 BP 357 EP 366 DI 10.1016/0921-4534(95)00449-1 PG 10 WC Physics, Applied SC Physics GA TE084 UT WOS:A1995TE08400020 ER PT J AU MARRS, RE ELLIOTT, SR STOHLKER, T AF MARRS, RE ELLIOTT, SR STOHLKER, T TI MEASUREMENT OF 2-ELECTRON CONTRIBUTIONS TO THE GROUND-STATE ENERGY OF HELIUM-LIKE IONS SO PHYSICAL REVIEW A LA English DT Article ID MULTICONFIGURATIONAL DIRAC-FOCK; RADIATIVE-CORRECTIONS; 2-ELECTRON IONS; TRIPLET-STATES; LAMB SHIFT; HYDROGENLIKE; TRANSITIONS; URANIUM; ATOMS AB We report direct measurements of two-electron contributions to the ground-state energy of high-Z heliumlike ions. The difference in radiative-recombination x-ray energy (i.e., ionization potential of the recombined ion) was measured for bare and hydrogenlike target ions trapped in an electron-beam ion trap for six elements ranging from Z = 32 to Z = 83. The achieved uncertainties (as small as 1.6 eV) test the second-order many-body contributions to the energy and approach the size of the two-electron (screened) Lamb shift: We also report a measurement of the ground-state ionization potential of heliumlike bismuth relative to heliumlike xenon. All results are in agreement with available theories. C1 GESELL SCHWERIONENFORSCH MBH,D-64220 DARMSTADT,GERMANY. RP MARRS, RE (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 34 TC 69 Z9 69 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3577 EP 3585 DI 10.1103/PhysRevA.52.3577 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300032 ER PT J AU FAENOV, AY BRYUNETKIN, BA DYAKIN, VM PIKUZ, TA SKOBELEV, IY PIKUZ, SA NILSEN, J OSTERHELD, AL SAFRONOVA, UI AF FAENOV, AY BRYUNETKIN, BA DYAKIN, VM PIKUZ, TA SKOBELEV, IY PIKUZ, SA NILSEN, J OSTERHELD, AL SAFRONOVA, UI TI HIGH-RESOLUTION MEASUREMENTS OF MGXI AND CUXX RESONANCE AND SATELLITE TRANSITIONS AND THE RESONANCE DEFECT IN THE MG-PUMPED CU X-RAY LASER SCHEME SO PHYSICAL REVIEW A LA English DT Article ID HELIUM-LIKE IONS; DIELECTRONIC SATELLITES; COMPLEX SPECTRA; LINE AB Magnesium and copper plasmas produced by 2-ns pulses of a Nd-glass laser were used to investigate satellite spectra of Li-Like Mg x and Na-Like Cu XIX and to verify a near resonance between Mg XI and Cu xx transitions, which is the basis of a proposed resonantly photopumped x-ray laser scheme. The emission was measured with a spherical crystal spectrograph that provided high spectral resolution (lambda/Delta lambda approximate to 8000) and spatial resolution in one dimension. The high resolution allowed improved wavelength measurements for a number of n=2-->1 Mg X transitions that are satellites to the He-like resonance line, including transitions with n = 3,4 spectator electrons. Using composite targets, the spatial resolution of the spectrograph enabled highly accurate measurements of 2p-4d Na-like copper transitions. Collisional-radiative models were used to assist the identification of the Mg X and Cu XIX transitions. Finally, the wavelength difference between the 2p(6)- (2p(5))(3/2)4d(5/2)(J=1) Cu XX transition and the 1s(2 1)S(0)-1s2p(3)P(1) Mg XI intercombination line was measured to be 2.5+/-0.8 m Angstrom, with the copper line having a longer wavelength. C1 PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. INST SPECT,TROITSK,RUSSIA. RP FAENOV, AY (reprint author), NATL SCI RES INST PHYS TECH RADIO TECH MEASUREMEN,CTR MULTICHARGES ION SPECTRAL DATA,MENDELEYEVSK,RUSSIA. RI Pikuz, Sergey/M-8231-2015 NR 40 TC 13 Z9 13 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3644 EP 3650 DI 10.1103/PhysRevA.52.3644 PG 7 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300038 ER PT J AU STEFANELLI, GS BEIERSDORFER, P DECAUX, V WIDMANN, K AF STEFANELLI, GS BEIERSDORFER, P DECAUX, V WIDMANN, K TI MEASUREMENT OF THE RADIATIVE LIFETIME OF THE 1S2S S-3(1) LEVEL IN HELIUM-LIKE MAGNESIUM SO PHYSICAL REVIEW A LA English DT Article ID DIELECTRONIC SATELLITE SPECTRA; 23S1 STATE; IONS AB We apply a recently developed electron-beam ion trap technique to measure the lifetime of the 1s2s S-3(1) level in heliumlike magnesium. The technique employs a fast-switching electron beam to produce and excite electrostatically trapped ions. The radiative lifetime is determined by observing the fluorescent decay of the 1s2s S-3(1) level after the beam energy is switched below the threshold for electron-impact excitation. A value of 13.61+/-0.49 mu s has been measured for the 1s2s S-3(1) level in heliumlike magnesium, in good agreement with theoretical predictions. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP STEFANELLI, GS (reprint author), UNIV NEVADA,DEPT PHYS,RENO,NV 89557, USA. NR 28 TC 29 Z9 30 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3651 EP 3654 DI 10.1103/PhysRevA.52.3651 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300039 ER PT J AU BEHAR, E MANDELBAUM, P SCHWOB, JL BARSHALOM, A OREG, J GOLDSTEIN, WH AF BEHAR, E MANDELBAUM, P SCHWOB, JL BARSHALOM, A OREG, J GOLDSTEIN, WH TI DIELECTRONIC RECOMBINATION OF NI-LIKE IONS THROUGH THE 3D(9)4LN'L' (N'=4,5) CU-LIKE CONFIGURATIONS SO PHYSICAL REVIEW A LA English DT Article ID IONIZATION EQUILIBRIUM; AUTOIONIZATION; COEFFICIENTS; EXCITATION; TANTALUM; SPECTRA AB Ab initio calculations of the rate coefficients for dielectronic recombination (DR) of ten ions along the Ni I isoelectronic sequence in the ground state (Mo14+, Ag19+, Xe26+, Pr31+, Gd36+, Dy38+, Ta45+, Au51+ At57+, and U64+) through the Cu-like 3d(9)4ln'l' (n'=4,5) inner-shell excited configurations were performed using the HULLAC code package. Resonant and nonresonant radiative stabilizing transitions and decays to autoionizing levels followed by radiative cascades are included. Collisional transitions following electron capture are neglected. Nonresonant stabilizing transitions are found to enhance the DR rates, and may even dominate the process at low electron temperature. The remarkable difference between the isoelectronic trend of the rate coefficients for DR through 3d(9)4l4l' and through 3d(9)4/5l' is emphasized. The trend of DR through 3d(9)4l4l' shows irregularities at relatively low temperature due to the progressive closing of DR channels as Z increases. Thus, the DR coefficients cannot be reproduced or interpolated by a simple analytical formula. Even for the smooth contributions of the 3d(9)4l5l' configurations, a simplified model using configuration averaging for autoionization and radiative decays instead of level-by-level detailed computations is found to overestimate the DR rates by a factor of up to 2. C1 NUCL RES CTR NEGEV,IL-84190 BEER SHEVA,ISRAEL. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BEHAR, E (reprint author), HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. NR 20 TC 36 Z9 40 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3770 EP 3779 DI 10.1103/PhysRevA.52.3770 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300056 ER PT J AU CHEN, MH OSTERHELD, AL AF CHEN, MH OSTERHELD, AL TI EFFECTS OF AUTOIONIZING RESONANCES ON ELECTRON-IMPACT EXCITATION RATES AND GAIN CALCULATIONS FOR NI-LIKE TANTALUM SO PHYSICAL REVIEW A LA English DT Article ID AUTO-IONIZING RESONANCES; HELIUM-LIKE IONS; BE-LIKE IONS AB The electron-impact excitation-rate coefficients for the 3d to 4l transitions in Ni-like tantalum were calculated using the distorted-wave and the multiconfiguration Dirac-Fock methods. As for the few-electron cases, the effects of autoionizing resonances are found to be very important for most transitions. In some transitions, resonances can enhance the rate coefficients by as much as a factor of 5. A collisional-radiative model was employed to study the effects of resonances on the laser gains. We found that the inclusions of the resonance excitation-rate coefficients in the calculations significantly reduce the gain coefficients for the two J=0-->1 lasing transitions but fail to explain the large discrepancies between the predicted and measured lasing spectrum. RP CHEN, MH (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 19 TC 13 Z9 16 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3790 EP 3795 DI 10.1103/PhysRevA.52.3790 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300058 ER PT J AU GAVRAS, P PINDZOLA, MS SCHULTZ, DR WELLS, JC AF GAVRAS, P PINDZOLA, MS SCHULTZ, DR WELLS, JC TI DIRECT SOLUTION OF THE TIME-DEPENDENT SCHRODINGER-EQUATION FOR PROTON-HYDROGEN COLLISIONS IN 2-DIMENSIONAL CARTESIAN SPACE SO PHYSICAL REVIEW A LA English DT Article ID ION-ATOM COLLISIONS; TRIPLE-CENTER TREATMENT; HARTREE-FOCK THEORY; CHARGE-TRANSFER; CROSS-SECTIONS; INTERMEDIATE ENERGIES; IONIZING COLLISIONS; ELECTRON-EMISSION; PROJECTILE-CHARGE; IONIZATION AB The wave function for the collision of a proton with a hydrogen atom is obtained by direct solution of the time-dependent Schrodinger equation in a model two-dimensional Cartesian space using lattice techniques. The dimensional reduction from the full three-dimensional (3D) space allows the consideration of huge collision ''volumes'' with minimal computational expense, while still preserving the idea of an impact parameter. The probabilities for charge exchange and ionization are estimated for different projectile energies ranging from 10 to 100 keV/amu. Comparisons with full 3D,calculations in smaller collision volumes show that the time-dependent behavior of the probability densities is quite similar for the 2D soft-core model interaction chosen here. The ionization dynamics are further analyzed in regard to the fate of that fraction of the probability density located near the saddle point between projectile and target potentials. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. HARVARD SMITHSONIAN CTR ASTROPHYS,INST THEORET ATOM & MOLEC PHYS,CAMBRIDGE,MA 02138. RP GAVRAS, P (reprint author), AUBURN UNIV,DEPT PHYS,AUBURN,AL 36849, USA. RI Wells, Jack/D-3675-2016 OI Wells, Jack/0000-0002-5083-3030 NR 46 TC 9 Z9 9 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 3868 EP 3876 DI 10.1103/PhysRevA.52.3868 PG 9 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300070 ER PT J AU TSANG, TYF AF TSANG, TYF TI OPTICAL 3RD-HARMONIC GENERATION AT INTERFACES SO PHYSICAL REVIEW A LA English DT Article ID 3RD-HARMONIC GENERATION; 2ND-HARMONIC GENERATION; BARIUM BORATE; SURFACE; SILICON AB Optical third-harmonic generation (THG) is generally a weak process but is dipole allowed, therefore it occurs in all materials, including dielectric materials with inversion symmetry. We report that when using focused high-intensity ultrashort laser pulses, this normally weak THG process becomes highly operative at a simple air-dielectric interface and is much stronger than the bulk of most dielectric materials. We characterized this nonlinear optical response at interfaces as a phenomenological surface-enhanced THG in transmission and/or in reflection. This surface THG is further cascaded in transmission or reflection from layered composite dielectric materials of a high-low index of refraction, resulting in a marked increase in photon conversion efficiency than that of a single interface. Although the present THG efficiency is lower than that of a typical phase-matching harmonic crystal, it is important to note that the surface-enhanced optical THG is a fundamental physical process occurring at all interfaces and is relatively free from the constraint of a phase-matching condition and wavelength restriction. Using optical THG at an interface, it becomes possible to generate wavelengths at which harmonic crystals are unavailable. These findings may lead to a new development of surface-enhanced studies and prompt a reexamination of the processes of high-harmonic generation at interfaces using a focused beam. RP TSANG, TYF (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 15 TC 153 Z9 155 U1 4 U2 21 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD NOV PY 1995 VL 52 IS 5 BP 4116 EP 4125 DI 10.1103/PhysRevA.52.4116 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA TE173 UT WOS:A1995TE17300101 ER PT J AU LEDVIJ, M KLEMM, RA AF LEDVIJ, M KLEMM, RA TI I(C)R(N) PRODUCT IN C-AXIS JOSEPHSON-JUNCTIONS INVOLVING HIGH-TEMPERATURE SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID LAYERED SUPERCONDUCTORS; OXIDE SUPERCONDUCTORS AB The Josephson coupling between a conventional and a high-temperature superconductor is investigated theoretically for the case in which the high-T-c superconductor with its c axis perpendicular to the junction has a layer with a significantly depleted order parameter. If that layer is in contact with the junction barrier, it is demonstrated that the product of the junction resistance R(n) and the critical current I-c can be substantially reduced from the standard Ambegaokar-Baratoff value. The result is discussed in connection with recent experiments aimed at exploring the symmetry of the order parameter in high-temperature superconductors. RP LEDVIJ, M (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12552 EP 12555 DI 10.1103/PhysRevB.52.12552 PG 4 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400022 ER PT J AU ZAKHAROV, O COHEN, ML AF ZAKHAROV, O COHEN, ML TI THEORY OF STRUCTURAL, ELECTRONIC, VIBRATIONAL, AND SUPERCONDUCTING PROPERTIES OF HIGH-PRESSURE PHASES OF SULFUR SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-DIFFRACTION; BRILLOUIN-ZONE; SPECIAL POINTS; TRANSITIONS; SELENIUM; GPA; TELLURIUM; STATE; TE AB Pseudopotential ab initio calculations are performed for three high-pressure phases of sulfur (bco, beta-Po, and bcc). These calculations yield a value of around 550 GPa for the transition pressure of the beta-Po to bcc transformation; however, we do not reproduce the reported bco to beta-Po phase transition. Ab initio calculations of the phonon spectrum and the electron-phonon interaction for the bcc phase of sulfur are also done using the frozen phonon method. The results predict that the bcc phase of sulfur is a metal with very low resistivity and a superconducting transition temperature of 15 K. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP ZAKHAROV, O (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 29 TC 30 Z9 30 U1 0 U2 12 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12572 EP 12578 DI 10.1103/PhysRevB.52.12572 PG 7 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400026 ER PT J AU WANG, JH LI, J YIP, S PHILLPOT, S WOLF, D AF WANG, JH LI, J YIP, S PHILLPOT, S WOLF, D TI MECHANICAL INSTABILITIES OF HOMOGENEOUS CRYSTALS SO PHYSICAL REVIEW B LA English DT Article ID THEORETICAL STRENGTH; PERFECT CRYSTAL AB Elastic stability criteria are derived for homogeneous lattices under arbitrary but uniform external load. These conditions depend explicitly on the applied stress and reduce, in the limit of vanishing load, to the criteria due to Born, involving only the elastic constants of the crystal. By demonstrating the validity of our results through a comparison of the analysis of an fee lattice under hydrostatic tension with direct molecular-dynamics simulation, we show that crystal stability under stress (ideal strength) is not a question only of material property, and that even qualitative predictions require the inclusion of the effects of applied stress. General implications of our findings, as well as relevance to stability phenomena in melting, polymorphism, crack nucleation, and solid-state amorphization, are discussed. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP WANG, JH (reprint author), MIT,DEPT NUCL ENGN,CAMBRIDGE,MA 02139, USA. RI Li, Ju/A-2993-2008; Phillpot, Simon/J-9117-2012; OI Li, Ju/0000-0002-7841-8058; Phillpot, Simon/0000-0002-7774-6535 NR 30 TC 315 Z9 322 U1 8 U2 42 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12627 EP 12635 DI 10.1103/PhysRevB.52.12627 PG 9 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400032 ER PT J AU SYTSMA, J MURDOCH, KM EDELSTEIN, NM BOATNER, LA ABRAHAM, MM AF SYTSMA, J MURDOCH, KM EDELSTEIN, NM BOATNER, LA ABRAHAM, MM TI SPECTROSCOPIC STUDIES AND CRYSTAL-FIELD ANALYSIS OF CM3+ AND GD3(+) IN LUPO4 SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-PARAMAGNETIC-RES; SINGLE-CRYSTALS; MAGNETIC-PROPERTIES; SYSTEMATIC ANALYSIS; RAMAN-SCATTERING; YPO4; SPECTRA; INTENSITIES; EXCITATION; STATE AB Optical-absorption and laser-selective-excitation spectroscopy have been used to investigate the electronic energy level structures of the actinide ion Cm3+ and the lanthanide ion Gd3+ in host crystals of LuPO4. Crystal-field levels have been determined up to 35 000 and 37 000 cm(-1), respectively, for the principal D-2d symmetry substitutional site. These have been analyzed in terms of a parametric Hamiltonian and the two systems compared. High-resolution fluorescence spectroscopy was used to resolve the ground-term splittings of Cm3+ and these are compared to the zero-field splittings measured in a previous EPR investigation. Some weaker fluorescence features also were observed, which are attributed to minor Cm3+ sites in the host lattice. Two-photon excitation was observed to the P-6(5/2) and P-6(7/2) multiplets of Gd3+. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP SYTSMA, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 40 TC 22 Z9 22 U1 2 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12668 EP 12676 DI 10.1103/PhysRevB.52.12668 PG 9 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400038 ER PT J AU SHASTRI, A BAKER, DB CONRADI, MS BORSA, F TORGESON, DR AF SHASTRI, A BAKER, DB CONRADI, MS BORSA, F TORGESON, DR TI NMR PRESSURE STUDY OF AL-27 AND CU-65 IN THE AL65CU20RU15 QUASI-CRYSTAL SO PHYSICAL REVIEW B LA English DT Article ID AL-CU-RU; QUASI-CRYSTALS; ELECTRONIC-PROPERTIES; ALLOYS; ORDER; MN AB The isotropic Knight shift (K-iso) and nuclear spin-lattice relaxation rate (R(1)) of Al-27 and Cu-65 were studied at 77 K in the Al65Cu20Ru15 I-phase as functions of pressure. Up to 1.8 kbar the Al-27 K-iso values showed no deviation from the room pressure value (0.032 +/- 0.003)%, and up to 1.9 kbar the R, values changed by no more than 20% of the values L-l bar for both Al-27 and Cu-65. These results and previous temperature and composition dependence NMR data are not consistent with a factor of 2 change in the s-band electronic density of states over an energy scale of 10(-2) eV. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. UNIV PAVIA,DIPARTIMENTO FIS,I-27100 PAVIA,ITALY. RP SHASTRI, A (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 26 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12681 EP 12684 DI 10.1103/PhysRevB.52.12681 PG 4 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400040 ER PT J AU SASAKI, T RAPPE, AM LOUIE, SG AF SASAKI, T RAPPE, AM LOUIE, SG TI AB-INITIO OPTIMIZED PSEUDOPOTENTIAL CALCULATIONS OF MAGNETIC SYSTEMS SO PHYSICAL REVIEW B LA English DT Article ID GROUND-STATE; IRON; FORMALISM; SOLIDS AB The structural and magnetic properties of ferromagnetic iron and nickel are computed using a plane-wave basis set and the optimized pseudopotentials to study the effectiveness of these methods for magnetic systems within the local-spin-density approximation. Although the pseudo wave functions deviate significantly from the all-electron wave functions in the core region, the calculated structural and magnetic properties are in excellent agreement with results obtained from all-electron calculations. The present results thus show that it is possible to apply the optimized pseudopotentials to magnetic systems using the convenient formalism of plane-wave basis sets. C1 LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN. UNIV PENN,DEPT CHEM,PHILADELPHIA,PA 19104. UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104. RP SASAKI, T (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 17 TC 19 Z9 19 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12760 EP 12765 DI 10.1103/PhysRevB.52.12760 PG 6 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400051 ER PT J AU PARK, Y ADENWALLA, S FELCHER, GP BADER, SD AF PARK, Y ADENWALLA, S FELCHER, GP BADER, SD TI SUPERPARAMAGNETIC RELAXATION OF FE DEPOSITED ON MGO(001) SO PHYSICAL REVIEW B LA English DT Article ID SPIN-GLASSES; MAGNETIZATION; PARTICLES; MODEL; DECAY AB Superparamagnetic behavior is investigated for Fe grown at 700 K onto MgO(001) to a thickness equivalent to that of a ten monolayer film. Two such Fe deposits separated by a 200-Angstrom deposit of MgO exhibit a ferromagnetic response with no hysteresis at either 300 or 150 K, but with identical reduced magnetization curves M(H/T) which confirms the existence of superparamagnetism. M(H) data at 300 K were fitted to a Langevin function to yield an average particle size of 100 Angstrom diameter. M(T) for held-cooled and zero-field-cooled samples shows behavior characteristic of superparamagnetic particles with a distribution in particle size. Time-dependent remanent magnetization data measured over a 20 h period at various temperatures show nonexponential decay attributed to the distribution in particle size and interactions among the particles. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RI Bader, Samuel/A-2995-2013; Park, Yongsup/B-6387-2009 NR 24 TC 44 Z9 44 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12779 EP 12783 DI 10.1103/PhysRevB.52.12779 PG 5 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400054 ER PT J AU MIRANOVIC, P DOBROSAVLJEVICGRUJIC, L KOGAN, VG AF MIRANOVIC, P DOBROSAVLJEVICGRUJIC, L KOGAN, VG TI GINZBURG-LANDAU THEORY OF VORTEX LATTICE STRUCTURE IN DEFORMABLE ANISOTROPIC SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Article ID SINGLE-CRYSTAL AB Correlation between the crystal lattice and the vortex lattice in anisotropic (uniaxial) type-II superconductors due to magnetoelastic interactions is studied theoretically. Within the strain-dependent Ginzburg-Landau model, the energy of the magnetoelastic interaction of the vortex lattice is evaluated with the Delta V effect (difference of specific volumes of normal and superconducting phase) as the main source of the elastic strain. For NbSe2 in tilted fields near the upper critical field H-c2, the vortex lattice is the same as obtained within the London model in fields well below H-c2 With magnetoelastic interactions taken into account C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. RP INST PHYS, POB 57, YU-11001 BELGRADE, YUGOSLAVIA. NR 23 TC 9 Z9 9 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 12852 EP 12857 DI 10.1103/PhysRevB.52.12852 PG 6 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400064 ER PT J AU BEAUCHAMP, KM RADZIHOVSKY, L SHUNG, E ROSENBAUM, TF WELP, U CRABTREE, GW AF BEAUCHAMP, KM RADZIHOVSKY, L SHUNG, E ROSENBAUM, TF WELP, U CRABTREE, GW TI LOCAL PROBE OF VORTEX PINNING ENERGIES IN THE BOSE GLASS SO PHYSICAL REVIEW B LA English DT Article ID COLUMNAR DEFECTS; YBA2CU3O7 CRYSTALS; LOCALIZATION; FIELD AB Columnar defects provide strong pinning centers for vortices in high-T-c superconductors, increasing global critical currents. Using a magnetometer array of micron dimensions, we characterize the local held profiles in untwinned single crystals of YBa2Cu3O7-delta with equivalent columnar defect densities B-phi. We find that the critical current is large only where the internal magnetic field BB phi, the critical current is sharply reduced. We model both local and global critical current measurements by generalizing the Bean picture to the case of irradiated high-T-c superconductors. C1 UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP BEAUCHAMP, KM (reprint author), UNIV CHICAGO,JAMES FRANCK INST,5640 S ELLIS AVE,CHICAGO,IL 60637, USA. NR 12 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 13025 EP 13028 DI 10.1103/PhysRevB.52.13025 PG 4 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400086 ER PT J AU CAI, ZX ZHU, YM WELCH, DO AF CAI, ZX ZHU, YM WELCH, DO TI LAYER-RIGIDITY MODEL AND THE MECHANISM FOR ION-DIFFUSION-CONTROLLED KINETICS IN THE BISMUTH CUPRATE 2212-TO-2223 TRANSFORMATION SO PHYSICAL REVIEW B LA English DT Article ID SOLIDS AB Recent transmission electron microscopy (TEM) experiments have shown that the transformation of the Pi cuprate 2212 phase to 2223 phase consists of fast growth of Ca/CuO2 planes in the Bi-2212 matrix. A theory is proposed which considers the cylindrical void created by the edge dislocation due to the insertion of a Ca/CuO2 plane to be a channel for fast ion diffusion. A layer-rigidity model is used to estimate the size of the void for Bi-2212/Bi-2223, as well as that for the stacking fault created by heavy-ion irradiation in YBa2Cu3O7 (YBCO) compounds. We find the predictions of the model to agree quantitatively with TEM measurements of the structures of ion-irradiated YBCO systems. The calculated void size for Bi-2212/Bi-2223 compounds is consistent with the existence of fast ion diffusion along the ab plane. The experimentally observed time dependence of the volume fraction of Bi-2223 during the transformation is found to be consistent with a one-dimensional diffusion-controlled transformation mechanism, as predicted by our model. RP CAI, ZX (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,BLDG 480,POB 5000,UPTON,NY 11973, USA. NR 10 TC 46 Z9 46 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 17 BP 13035 EP 13040 DI 10.1103/PhysRevB.52.13035 PG 6 WC Physics, Condensed Matter SC Physics GA TD724 UT WOS:A1995TD72400088 ER PT J AU ZUO, F KHIZROEV, S ALEXANDRAKIS, GC SCHLUETER, JA GEISER, U WILLIAMS, JM AF ZUO, F KHIZROEV, S ALEXANDRAKIS, GC SCHLUETER, JA GEISER, U WILLIAMS, JM TI ANOMALOUS MAGNETIZATION IN SINGLE-CRYSTAL KAPPA-[BIS(ETHYLENEDITHIOTETRATHIAFULVALENE)]CU-2[N(CN)(2)]BR SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Note ID PRESSURE ORGANIC SUPERCONDUCTOR; LAYERED SUPERCONDUCTORS; BEDT-TTF; KAPPA-(BEDT-TTF)2CUBR; TRANSITION; CREEP; BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE; YBA2CU3O7-DELTA; TEMPERATURE; ANISOTROPY AB We report detailed magnetization studies on single-crystal superconductors of kappa-[bis(ethylenedithiotetrathiafulvalene)]Cu-2[N(CN)(2)]Br with the field H parallel to the b axis (perpendicular to the conducting plane). At high temperatures, the magnetization, M, displays a power-law dependence on H with M proportional to H-n and n=-2/3. The critical current extrapolated from the width of the hysteresis loop depends on H exponentially. At low temperatures (T<7 K), an anomalous field dependence with a change of sign in the curvature of M(H) is observed. The anomalous field dependence is qualitatively similar to the fishtail magnetization reported for the oxide superconductors. Possible mechanisms giving rise to this effect are discussed. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP ZUO, F (reprint author), UNIV MIAMI,DEPT PHYS,CORAL GABLES,FL 33124, USA. NR 30 TC 6 Z9 6 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13126 EP 13129 PG 4 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500015 ER PT J AU BASOV, DN MOOK, HA DABROWSKI, B TIMUSK, T AF BASOV, DN MOOK, HA DABROWSKI, B TIMUSK, T TI C-AXIS RESPONSE OF SINGLE-LAYERED AND DOUBLE-LAYERED CUPRATES SO PHYSICAL REVIEW B LA English DT Note ID NORMAL-STATE; CHARGE DYNAMICS; CUO2 PLANES; LA2-XSRXCUO4; TRANSPORT; SUPERCONDUCTORS; CONDUCTIVITY AB We report on an infrared study of the c-axis response of the single-layered superconductor La2-xSrxCuO4 (T-c=34 K) and analyze the results in comparison with our earlier data for the double-layered YBa2Cu4O8 [Basov et at, Phys. Rev. B 50, 3511 (2994)]. We find that in both materials nonmetallic temperature dependence of the de resistivity along the c axis results from the transfer of the spectral weight from the far-infrared region to much higher energies. The energy scale associated with this transfer in the normal state is about 200 cm(-1) in the double-layered system and exceeds 5000 cm(-1) in the single-layered material. No well-defined pseudogap is found in the latter case. The superconducting state in both systems is highly unusual since the spectral weight of the superfluid delta function peak is accumulated from the frequencies as high as 20 k T-c. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115. RP BASOV, DN (reprint author), MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON,ON L8S 4M1,CANADA. NR 24 TC 59 Z9 59 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13141 EP 13144 PG 4 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500019 ER PT J AU SODERLIND, P ERIKSSON, O JOHANSSON, B WILLS, JM AF SODERLIND, P ERIKSSON, O JOHANSSON, B WILLS, JM TI THEORETICAL INVESTIGATION OF THE HIGH-PRESSURE CRYSTAL-STRUCTURES OF CE AND TH SO PHYSICAL REVIEW B LA English DT Article ID CERIUM METAL; EXTREME COMPRESSIONS; ELECTRONIC-STRUCTURE; PHASE-TRANSITION; THORIUM; BAND; LANTHANUM; SYSTEMS; SOLIDS; STATE AB The high-pressure crystal structures of Ce and Th are studied theoretically by means of a full potential linear muffin-tin orbital technique, where the generalized gradient correction to density-functional theory has been implemented. A crystallographic phase transition from fcc to bet is found for alpha-Ce at about 10 GPa, in good agreement with experiment The calculated pressure dependence of the crystallographic cia ratio (of the bet structure) is in good agreement with experiment. For alpha-Ce a subsequent transition to the hcp crystal structure is predicted at about 1600 GPa. For Th a continuous transformation from fee to bet at 45 GPa is found, confirming recent experimental findings. Also for this material the calculated pressure dependence of the crystallographic c/a ratio (of the bet structure) is in good agreement with experiment. For Th we also predict a transformation to the hcp crystal structure at even higher pressures. C1 UNIV UPPSALA,DEPT PHYS,CONDENSED MATTER THEORY GRP,S-75121 UPPSALA,SWEDEN. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP SODERLIND, P (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 40 TC 37 Z9 37 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13169 EP 13176 DI 10.1103/PhysRevB.52.13169 PG 8 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500025 ER PT J AU HIROTA, K HILL, JP SHAPIRO, SM SHIRANE, G FUJII, Y AF HIROTA, K HILL, JP SHAPIRO, SM SHIRANE, G FUJII, Y TI NEUTRON-SCATTERING AND X-RAY-SCATTERING STUDY OF THE 2 LENGTH SCALES IN THE CRITICAL FLUCTUATIONS OF SRTIO3 SO PHYSICAL REVIEW B LA English DT Article ID STRUCTURAL PHASE-TRANSITIONS; CENTRAL-PEAK; KMNF3; PHONONS; RBCAF3 AB Combined high-resolution neutron and x-ray diffraction experiments have been performed on several differently prepared single crystals of SrTiO3 in order to investigate the two length scales present near the cubic-to-tetragonal phase transition occurring at T-c similar to 100 K. The x-ray measurements show that the narrow component (long-length scale) exists in all crystals. However, the broad component (short-length scale) is sample dependent and unobservable in some crystals. The neutron experiments, which probe the entire sample volume, reveal that the narrow component is present only in thinly sliced samples (thickness < 1 mm), whereas bulk samples show only the broad component. In the thinly sliced samples, the broad component is not observed. These results lead to the conclusion that the narrow component is located in the near surface, or ''skin,'' region of the crystal and the size of the skin is sample dependent. By using the energy analysis capabilities of the neutron experiment we could separate the soft mode from the elastic central peak and found that the intensity of the central component is sample dependent, which is consistent with theories relating the origin of the central component to defects. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN. RI Hirota, Kazuma/C-6797-2008; Hill, John/F-6549-2011 NR 41 TC 47 Z9 47 U1 0 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13195 EP 13205 DI 10.1103/PhysRevB.52.13195 PG 11 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500028 ER PT J AU TENNANT, DA NAGLER, SE WELZ, D SHIRANE, G YAMADA, K AF TENNANT, DA NAGLER, SE WELZ, D SHIRANE, G YAMADA, K TI EFFECTS OF COUPLING BETWEEN CHAINS ON THE MAGNETIC EXCITATION SPECTRUM OF KCUF3 SO PHYSICAL REVIEW B LA English DT Article ID ANTI-FERROMAGNETS; FIELD AB The effects of the small ferromagnetic coupling between chains on the dynamical behavior of the spins in KCuF3 are investigated. Inelastic neutron-scattering measurements of the magnetic excitations in KCuF3 were made using a triple-axis spectrometer. The scattering was studied at a number of temperatures; measurements below T-N = 39.07 +/- 0.02 K showed well-defined spin waves for energies less than the interchain zone-boundary energy of 11.5 meV. At higher energies a continuum of scattering was observed. The measurements are compared with spin-wave theory, and the field theory used in the preceding paper (paper I), At a temperature of 9 K the scattering at energy transfers of 25 meV and below are in excellent agreement with spin-wave theory when two-magnon processes are included. Above the Neel ordering temperature the measurements are compared with field theory. Although this qualitatively describes the temperature behavior of the line shapes it does not account for the observed change in intensity with temperature. This discrepancy is explained by residual interchain correlations. C1 UNIV FLORIDA, DEPT PHYS, GAINESVILLE, FL 32611 USA. HAHN MEITNER INST BERLIN GMBH, D-14091 BERLIN, GERMANY. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. TOHOKU UNIV, DEPT PHYS, AOBA KU, SENDAI, MIYAGI 980, JAPAN. RP UNIV OXFORD, CLARENDON LAB, PARKS RD, OXFORD OX1 3PU, ENGLAND. RI Yamada, Kazuyoshi/C-2728-2009; Nagler, Stephen/B-9403-2010; Nagler, Stephen/E-4908-2010; Tennant, David/Q-2497-2015 OI Nagler, Stephen/0000-0002-7234-2339; Tennant, David/0000-0002-9575-3368 NR 19 TC 63 Z9 63 U1 2 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13381 EP 13389 DI 10.1103/PhysRevB.52.13381 PG 9 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500051 ER PT J AU BUTLER, WH ZHANG, XG NICHOLSON, DMC MACLAREN, JM AF BUTLER, WH ZHANG, XG NICHOLSON, DMC MACLAREN, JM TI FIRST-PRINCIPLES CALCULATIONS OF ELECTRICAL-CONDUCTIVITY AND GIANT MAGNETORESISTANCE OF CO-VERTICAL-BAR-CU-VERTICAL-BAR-CO SPIN VALVES SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC MULTILAYERED STRUCTURES; METAL MULTILAYERS; TRANSPORT AB We show that the Kubo formula can be used to calculate the nonlocal electrical conductivity of layered systems from first principles, We use the layer Korringa-Kohn-Rostoker method to calculate the electronic structure and Green function of a slat, of copper embedded in cobalt. The electronic structure is calculated self-consistently within the focal density approximation to density functional theory. We use the Green function to evaluate the Kubo formula and calculate the conductivity for both majority and minority spins and for alignment and antialignment of the Co moments on either side of the Cu spacer layers. This allows us to determine the giant magnetoresistance from first principles. We investigate three possibilities for the scattering in Co\Cu\Co: (i) equal electron lifetimes for Cu, majority-spin Co, and minority-spin Co, (ii) equal electron lifetimes for majority and minority Co, weaker scattering in Cu, and spin-dependent interfacial scattering, (iii) electron lifetimes for majority- and minority-spin cobalt proportional to their Fermi energy densities of states, spin-dependent interfacial scattering, and spin-independent boundary scattering. C1 TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118. RP BUTLER, WH (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 27 TC 66 Z9 67 U1 2 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13399 EP 13410 DI 10.1103/PhysRevB.52.13399 PG 12 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500053 ER PT J AU BUTERA, A TOVAR, M OSEROFF, SB FISK, Z AF BUTERA, A TOVAR, M OSEROFF, SB FISK, Z TI INPLANE MAGNETIZATION ANISOTROPY IN GD2CUO4 SINGLE-CRYSTALS SO PHYSICAL REVIEW B LA English DT Article ID LANTHANIDE CUPRATES LN2CUO4; WEAK FERROMAGNETISM; R2CUO4; DC; TB; DY; HO; ER; TM AB We present here detailed de magnetization measurements of a Gd2CuO4 single crystal. Besides the strong out-of-plane anisotropy that favors the orientation of the magnetization within the CuO2 planes for R(2) CuO4, we have also found in-plane anisotropy when the external field H is applied parallel to the CuO2 planes. Three regions could be distinguished in magnetization M vs field curves: for O < H < H-c' approximate to 35 G, M is only slightly anisotropic. A metamagneticlike transition is observed when H is parallel to an anisotropy easy axis, coincident with one [110] direction. Above this transition a ''hidden'' weak ferromagnetic component develops. For H-c' < H < H-c* approximate to 300 G strong anisotropy is found, and above the critical field H-c* all magnetic moments are completely aligned with the external field and the magnetization is again isotropic. Hysteretic behavior has been observed at the metamagnetic transition, probably due to the existence of weak ferromagnetic domains. An intraplanar anisotropy field H-x approximate to 1200 G and an interplanar coupling constant J(perpendicular to) approximate to 2 mK, have been estimated from the experimental critical fields using a mean field description of the magnetic coupling between CuO2 planes. C1 COMIS NACL ENERGIA ATOM,INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA. SAN DIEGO STATE UNIV,SAN DIEGO,CA 92182. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP BUTERA, A (reprint author), COMIS NACL ENERGIA ATOM,CTR ATOM BARILOCHE,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA. NR 21 TC 11 Z9 11 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13444 EP 13449 DI 10.1103/PhysRevB.52.13444 PG 6 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500058 ER PT J AU FISHER, RA RADHAKRISHNA, P PHILLIPS, NE BADDING, JV STACY, AM AF FISHER, RA RADHAKRISHNA, P PHILLIPS, NE BADDING, JV STACY, AM TI LOW-TEMPERATURE SPECIFIC-HEAT OF ANTIFERROMAGNETIC EUNI5P3 AND MIXED-VALENT EUNI2P2 IN MAGNETIC-FIELDS TO 7T SO PHYSICAL REVIEW B LA English DT Article ID PHASE AB The specific heats of EUNi(5)P(3), an antiferromagnet, and EuNi2P2, a mixed-valence compound, have been measured between 0.4 and 30 K in magnetic fields of, respectively, 0, 0.5, 1, 1.5, 2.5, 5, and 7 T, and 0 and 7 T. In zero field the specific heat of EuNi5P3 shows a h-like anomaly with a maximum at 8.3 K. With increasing field in the range 0-2.5 T, the maximum shifts to lower temperatures, as expected for an antiferromagnet. In higher fields the antiferromagnetic ordering is destroyed and the magnetic part of the specific heat approaches a Schottky anomaly that is consistent with expectations for the crystal-field/Zeeman levels. In low fields and for temperatures between 1.5 acid 5 K the magnetic contribution to the specific heat is proportional to the temperature, indicating a high density of excited states with an energy dependence that is very unusual for an antiferromagnet. The entropy associated with the magnetic ordering is similar to R In8, confirming that only the Eu2+-with J=7/2, S=7/2, L=0-orders below 30 R. In zero field approximately 20% of the entropy occurs above the Neel temperature, consistent. with the usual amount of short-range order observed in antiferromagnets. The hyperfine magnetic field at the Eu nuclei in EUNi(5)P(3) is 33.3 T, in good agreement with a value calculated from electron-nuclear double resonance measurements. For EuNi2P2 the specific heat is nearly field independent and shows no evidence of magnetic ordering or hyperfine fields. The coefficient of the electron contribution to the specific heat is similar to 100 mJ/mol K-2. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. INDIAN INST SCI,DEPT PHYS,BANGALORE 12,KARNATAKA,INDIA. RP FISHER, RA (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Badding, John/A-2737-2011 OI Badding, John/0000-0002-4517-830X NR 16 TC 20 Z9 20 U1 0 U2 15 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13519 EP 13525 DI 10.1103/PhysRevB.52.13519 PG 7 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500068 ER PT J AU KOSHELEV, AE LARKIN, AI AF KOSHELEV, AE LARKIN, AI TI PARAMAGNETIC MOMENT IN FIELD-COOLED SUPERCONDUCTING PLATES - PARAMAGNETIC MEISSNER EFFECT SO PHYSICAL REVIEW B LA English DT Article AB We calculate the magnetic moment for thin superconducting plates after field cooling. We consider the situation when the whole magnetic flux is trapped within the strip and compressed due to inhomogeneous cooling. We demonstrate that the magnetic moment in such a state is paramagnetic. For a thin superconducting strip we found exact solutions for the field and current distributions at any degree of flux compression. The cases of complete and partial Bean states were considered. For a thin superconducting disk we found an approximate solution for the case of weak compression and a complete Bean state. The mechanism considered can explain the paramagnetic Meissner effect observed recently in some high-T-c superconductors and in Nb. C1 INST SOLID STATE PHYS,CHERNOGOLOVKA 142432,RUSSIA. LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA. RP KOSHELEV, AE (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Koshelev, Alexei/K-3971-2013 OI Koshelev, Alexei/0000-0002-1167-5906 NR 11 TC 114 Z9 114 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD NOV 1 PY 1995 VL 52 IS 18 BP 13559 EP 13562 DI 10.1103/PhysRevB.52.13559 PG 4 WC Physics, Condensed Matter SC Physics GA TD725 UT WOS:A1995TD72500073 ER PT J AU ARRIAGA, A PANDHARIPANDE, VR WIRINGA, RB AF ARRIAGA, A PANDHARIPANDE, VR WIRINGA, RB TI 3-BODY CORRELATIONS IN FEW-BODY NUCLEI SO PHYSICAL REVIEW C LA English DT Article ID PARTICLE AB A detailed comparison of Faddeev and variational wave functions for H-3, calculated with realistic nuclear forces, has been made to study the form of three-body correlations in few-body nuclei. Three new three-body correlations for use in variational wave functions have been identified, which substantially reduce the difference with the Faddeev wave function. The difference between the variational upper bound and the Faddeev binding energy is reduced by half, to typically <2%. These three-body correlations also produce a significant lowering of the variational binding energy for He-4 and larger nuclei. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RP ARRIAGA, A (reprint author), UNIV LISBON,CTR FIS NUCL,AVE GAMA PINTO 2,P-1699 LISBON,PORTUGAL. RI Wiringa, Robert/M-4970-2015; Arriaga, Ana/N-2369-2015 OI Arriaga, Ana/0000-0002-8113-7425 NR 10 TC 44 Z9 44 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2362 EP 2368 DI 10.1103/PhysRevC.52.2362 PG 7 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600019 ER PT J AU CULLEN, DM BAKTASH, C FITCH, MJ FROSCH, I GRAY, RW JOHNSON, NR LEE, IY MACCHIAVELLI, AO REVIOL, W WANG, XH YU, CH AF CULLEN, DM BAKTASH, C FITCH, MJ FROSCH, I GRAY, RW JOHNSON, NR LEE, IY MACCHIAVELLI, AO REVIOL, W WANG, XH YU, CH TI HIGH-SPIN STATES AND K-FORBIDDEN DECAY IN HF-172 SO PHYSICAL REVIEW C LA English DT Article ID BARRIER PENETRATION; NUCLEI; BANDS AB High-spin states were populated in Hf-172 With the Ca-48+Te-128 reaction at 200 and 214 MeV. All of the known rotational bands in Hf-172 have been extended and five new rotational bands have been observed using the Gammasphere spectrometer. This study establishes the highest known state in Hf-172 at spin 44HBAR. One of the new bands is a K-pi=(14(+)) strongly coupled rotational band. In conflict with the K-selection rule another newly established bandhead state, with spin I=K=12, is observed to gamma decay directly to the yrast 12(+) state. This large breakdown in the K-selection rule (Delta K approximate to 12) may be due to a mixing between the low- and high-g states in Hf-172. C1 UNIV ROCHESTER,NUCL STRUCT RES LAB,ROCHESTER,NY 14627. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RI Fitch, Michael/E-5757-2011 OI Fitch, Michael/0000-0002-2494-9486 NR 22 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2415 EP 2428 DI 10.1103/PhysRevC.52.2415 PG 14 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600025 ER PT J AU ORMAND, WE BROWN, BA AF ORMAND, WE BROWN, BA TI ISOSPIN-MIXING CORRECTIONS FOR FP-SHELL FERMI TRANSITIONS SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-STRUCTURE DEPENDENCE; BETA-DECAY; RADIATIVE-CORRECTIONS; MODEL CALCULATIONS; MATRIX ELEMENT; STANDARD-MODEL; ISOTOPES AB Isospin-mixing corrections for superallowed Fermi transitions in fp-shell nuclei are computed within the framework of the shell model. The study includes three nuclei that are part of the set of nine accurately measured transitions as well as five cases that are expected to be measured in the future at radioactive-beam facilities. We also include some new calculations for C-10. With the isospin-mixing corrections applied to the nine accurately measured ft values, the conserved-vector-current hypothesis and the unitarity condition of the Cabbibo-Kobayashi-Maskawa matrix are tested. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. MICHIGAN STATE UNIV,NATL SUPERCONDUCTING CYCLOTRON LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. RP ORMAND, WE (reprint author), UNIV TENNESSEE,DEPT PHYS,401 NIELSEN HALL,KNOXVILLE,TN 37996, USA. NR 37 TC 111 Z9 111 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2455 EP 2460 DI 10.1103/PhysRevC.52.2455 PG 6 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600029 ER PT J AU YANG, X WANG, L RAPAPORT, J GOODMAN, CD FOSTER, CC WANG, Y SUGARBAKER, E MARCHLENSKI, D DELUCIA, S LUTHER, B RYBARCYK, L TADDEUCCI, TN PARK, BK AF YANG, X WANG, L RAPAPORT, J GOODMAN, CD FOSTER, CC WANG, Y SUGARBAKER, E MARCHLENSKI, D DELUCIA, S LUTHER, B RYBARCYK, L TADDEUCCI, TN PARK, BK TI DIPOLE EXCITATIONS IN P-SHELL NUCLEI VIA (P,N) REACTIONS SO PHYSICAL REVIEW C LA English DT Article ID ISOVECTOR GIANT-RESONANCES; LIGHT-NUCLEI; CHARGE-EXCHANGE; ENERGY-LEVELS; C-12(N,P)B-12 REACTION; INTERMEDIATE ENERGIES; MONOENERGETIC PHOTONS; CROSS-SECTIONS; GAMOW-TELLER; STRENGTH AB Using the neutron time-of-flight facility at the Indiana University Cyclotron Facility we have studied (p,n) reactions on the light nuclei Li-6,Li-7, B-10,B-11, and C-12,C-13. Double differential cross sections have been measured between theta(lab)=0 degrees and 50 degrees degrees in 5 degrees intervals, at E(p)=186 MeV. Contributions of the quasifree reaction in the giant resonance region are estimated. Energy spectra of Delta L=1 transitions have been extracted using multipole decomposition analysis. The resulting Delta L=1 spectra are compared with results of photonuclear reactions. Empirical results are also compared with distorted wave impulse approximation calculations. C1 INDIANA UNIV,IUCF,BLOOMINGTON,IN 47405. OHIO STATE UNIV,COLUMBUS,OH. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NEW MEXICO STATE UNIV,LAS CRUCES,NM 88003. RP YANG, X (reprint author), OHIO UNIV,ATHENS,OH 45701, USA. NR 57 TC 28 Z9 28 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2535 EP 2545 DI 10.1103/PhysRevC.52.2535 PG 11 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600040 ER PT J AU WELLS, SP WISSINK, SW BACHER, AD BERG, GPA BOWYER, SM CHANG, S FRANKLIN, WA LIU, J STEPHENSON, EJ BEENE, JR BERTRAND, FE HALBERT, ML MUELLER, PE OLIVE, DH STRACENER, DW VARNER, RL LISANTTI, J HICKS, KH AF WELLS, SP WISSINK, SW BACHER, AD BERG, GPA BOWYER, SM CHANG, S FRANKLIN, WA LIU, J STEPHENSON, EJ BEENE, JR BERTRAND, FE HALBERT, ML MUELLER, PE OLIVE, DH STRACENER, DW VARNER, RL LISANTTI, J HICKS, KH TI SIMULTANEOUS MEASUREMENTS OF ((P)OVER-RIGHT-ARROW,(P)OVER-RIGHT-ARROW') AND ((P)OVER-RIGHT-ARROW,P'-GAMMA) OBSERVABLES FOR THE 15.11 MEV, 1(+), T=1 STATE IN C-12 AT 200 MEV SO PHYSICAL REVIEW C LA English DT Article ID POLARIZATION-TRANSFER OBSERVABLES; INELASTIC PROTON-SCATTERING; WAVE IMPULSE APPROXIMATION; INTERMEDIATE ENERGIES; NUCLEUS SCATTERING; NN INTERACTION; EXCITATION; EXCHANGE; 400-MEV AB We have made simultaneous measurements of singles ((p) over right arrow,(p) over right arrow') spin-transfer observables and coincident ((p) over right arrow,p' gamma) yields and asymmetries for the 15.11 MeV, 1(+), T=1 state in C-12, at an incident proton bombarding energy of 200 MeV. Data were taken at four proton scattering angles ranging from theta(p)(c.m.)=5.5 degrees to 16.5 degrees. Both vertical (normal to the reaction plane) and horizontal (in-plane) incident beam polarizations were used, which allowed us to extract 16 different observables for this transition. In particular, using the ((p) over right arrow,p' gamma) reaction, we measured the sideways and longitudinal analyzing powers, D-OS and D-OL, which vanish identically in the ((p) over right arrow,p') reaction. Detailed comparisons of all observables to calculations done in both relativistic and nonrelativistic formalisms are presented. Surprisingly, a relativistic description in which knock-on exchange processes are not explicitly included provides the best overall agreement with the data. C1 INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47408. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. CENTENARY COLL LOUISIANA,SHREVEPORT,LA 71134. OHIO UNIV,ATHENS,OH 45701. NR 52 TC 5 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2559 EP 2576 DI 10.1103/PhysRevC.52.2559 PG 18 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600043 ER PT J AU BENHAR, O CARLSON, J PANDHARIPANDE, VR SCHIAVILLA, R AF BENHAR, O CARLSON, J PANDHARIPANDE, VR SCHIAVILLA, R TI EUCLIDEAN RESPONSES OF HE-4 AT HIGH MOMENTUM-TRANSFER SO PHYSICAL REVIEW C LA English DT Article ID ELECTRON-NUCLEUS SCATTERING; NEUTRON-SCATTERING; LIGHT-NUCLEI; MATTER; TRANSPARENCY AB The Euclidean proton and nucleon responses of He-4 at q=10 fm(-1), evaluated with the correlated Glauber approximation using a realistic nucleon-nucleon interaction and nonrelativistic kinematics, are compared to those obtained from the Green's function Monte Carlo approach. The results show that final state interactions play a crucial role even at this large value of q, and that their effect can be quantitatively accounted for with the correlated Glauber approximation. C1 IST SUPER SANITA,PHYS LAB,I-00161 ROME,ITALY. LOS ALAMOS NATL LAB,DIV THEORY,LOS ALAMOS,NM 87545. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. CEBAF,THEORY GRP,NEWPORT NEWS,VA 23606. OLD DOMINION UNIV,DEPT PHYS,NORFOLK,VA 23529. IST SUPER SANITA,IST NAZL FIS NUCL,SEZ SANITA,I-00161 ROME,ITALY. RI Benhar, Omar/J-6044-2012 OI Benhar, Omar/0000-0001-6818-9215 NR 33 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2601 EP 2607 DI 10.1103/PhysRevC.52.2601 PG 7 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600046 ER PT J AU ZHANG, WM MADEY, R SCHAMBACH, J ELAASAR, M KEANE, D ANDERSON, BD BALDWIN, AR WATSON, JW WESTFALL, GD KREBS, G WEIMAN, H ZHANG, J GALE, C AF ZHANG, WM MADEY, R SCHAMBACH, J ELAASAR, M KEANE, D ANDERSON, BD BALDWIN, AR WATSON, JW WESTFALL, GD KREBS, G WEIMAN, H ZHANG, J GALE, C TI NEUTRONS FROM MULTIPLICITY-SELECTED AU-AU COLLISIONS AT 150A, 250A, 400A, AND 650A MEV SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; MOMENTUM-DEPENDENT INTERACTIONS; RELATIVISTIC NUCLEAR COLLISIONS; COLLECTIVE FLOW; SIDEWARD FLOW; FRAGMENT FLOW; ENERGY; MATTER; SIMULATION; EMISSION AB We measured neutron triple-differential cross sections from multiplicity-selected Au-Au collisions at 150A, 250A, 400A, and 650A MeV. The reaction plane for each collision was estimated from the summed transverse velocity vector of the charged fragments emitted in the collision. We examined the azimuthal distribution of the triple-differential cross sections as a function of the polar angle and the neutron rapidity. We extracted the average in-plane transverse momentum [P-x] and the normalized observable [P-x/P-perpendicular to], where P-perpendicular to is the neutron transverse momentum, as a function of the neutron center-of-mass rapidity, and we examined the dependence of these observables on beam energy. These collective flow observables for neutrons, which are consistent with those of protons plus bound nucleons from the Plastic Ball Group, agree with the Boltzmann Uehling-Uhlenback (BUU) calculations with a momentum-dependent interaction. Also, we calculated the polar-angle-integrated maximum azimuthal anisotropy ratio R from the value of [P-x/P-perpendicular to]. C1 KENT STATE UNIV,NUCL RES CTR,KENT,OH 44242. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48823. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MCGILL UNIV,DEPT PHYS,MONTREAL,PQ H3A 2T8,CANADA. RP ZHANG, WM (reprint author), KENT STATE UNIV,DEPT PHYS,KENT,OH 44242, USA. NR 43 TC 3 Z9 3 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2643 EP 2651 DI 10.1103/PhysRevC.52.2643 PG 9 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600051 ER PT J AU ABBOTT, T AKIBA, Y ALBURGER, D BEAVIS, D BEERY, P BLOOMER, MA BOND, PD CHASMAN, C CHEN, Z CHU, YY COLE, BA COSTALES, JB CRAWFORD, HJ CUMMING, JB DEBBE, R DUEK, E ENGELAGE, J FUNG, SY GRODZINS, L GUSHUE, S HAMAGAKI, H HANSEN, O HAUSTEIN, P HOMMA, S HUANG, HZ IKEDA, Y KANG, J KATCOFF, S KAUFMAN, S LEDOUX, RJ LEVINE, MJ LINDSTROM, PJ MIAKE, Y MORSE, RJ NAGAMIYA, S OLNESS, J PARSONS, CG REMSBERG, LP SAKURAI, H SARABURA, M SETO, R STEADMAN, SG STEPHANS, GSF SUGITATE, T TANAKA, M TANNENBAUM, MJ TORIKOSHI, M VANDIJK, JH VIDEBAEK, E VIENT, M VINCENT, P VULGARIS, E VUTSADAKIS, V WATSON, WA WEGNER, HE WOODRUFF, DS ZAJC, WA AF ABBOTT, T AKIBA, Y ALBURGER, D BEAVIS, D BEERY, P BLOOMER, MA BOND, PD CHASMAN, C CHEN, Z CHU, YY COLE, BA COSTALES, JB CRAWFORD, HJ CUMMING, JB DEBBE, R DUEK, E ENGELAGE, J FUNG, SY GRODZINS, L GUSHUE, S HAMAGAKI, H HANSEN, O HAUSTEIN, P HOMMA, S HUANG, HZ IKEDA, Y KANG, J KATCOFF, S KAUFMAN, S LEDOUX, RJ LEVINE, MJ LINDSTROM, PJ MIAKE, Y MORSE, RJ NAGAMIYA, S OLNESS, J PARSONS, CG REMSBERG, LP SAKURAI, H SARABURA, M SETO, R STEADMAN, SG STEPHANS, GSF SUGITATE, T TANAKA, M TANNENBAUM, MJ TORIKOSHI, M VANDIJK, JH VIDEBAEK, E VIENT, M VINCENT, P VULGARIS, E VUTSADAKIS, V WATSON, WA WEGNER, HE WOODRUFF, DS ZAJC, WA TI MULTIPLICITY DISTRIBUTIONS FROM CENTRAL COLLISIONS OF O-16+CU AT 14.6A GEV/C AND INTERMITTENCY SO PHYSICAL REVIEW C LA English DT Article ID CHARGED-PARTICLE MULTIPLICITY; NUCLEUS-NUCLEUS COLLISIONS; HEAVY-ION INTERACTIONS; HIGH-ENERGY COLLISIONS; PP COLLISIONS; RAPIDITY DISTRIBUTIONS; E+E ANNIHILATION; 250 GEV/C; PSEUDORAPIDITY INTERVALS; 2-PARTICLE CORRELATIONS AB The E-802 Collaboration at the BNL-AGS has measured charged particle multiplicity distributions from central (ZCAL) collisions of O-16+Cu at 14.6A GeV/c as a function of the pseudorapidity interval delta eta greater than or equal to 0.1 in the range 1.2 less than or equal to eta less than or equal to 2.2. The fluctuations of these distributions as a function of the pseudorapidity interval have been studied by the method of normalized factorial moments and also by directly fitting the measurements to negative binomial distributions (NBD). Excellent fits to NBD were obtained in all delta eta bins, allowing, for the first time, a systematic formulation of the subject of intermittency in terms of distributions to complement the description based on normalized factorial moments. In agreement with all previous measurements of NBD fits to multiplicity distributions in hadron and lepton reactions, the k parameter of the NBD fit for central O-16+Cu collisions is found to exhibit an apparently linear increase with the Sg interval, albeit with a much steeper slope than for other reactions, and a nonzero intercept, k(0)not equal 0. The evolution of the NBD parameter k(delta eta) is used to determine the two-particle short-range rapidity correlation length for central O-16+Cu collisions, xi=0.18+/-0.05, which is much shorter than the value xi similar to 1-3 for hadron collisions, but this is a quantitative rather than a qualitative difference. These results lead to a simple and elegant explanation of the intermittency formalism, without resort to fractals, for all reactions, which demystifies intermittency-for O-16+Cu central collisions, intermittency is nothing more than the apparent statistical independence of the multiplicity in small pseudorapidity bins, delta eta similar to 0.2, due to the surprisingly short two-particle rapidity correlation length. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92507. COLUMBIA UNIV,NEW YORK,NY 10027. NEVIS LABS,IRVINGTON,NY 10533. HIROSHIMA UNIV,HIROSHIMA 730,JAPAN. UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN. KYUSHU UNIV,FUKUOKA 812,JAPAN. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN. RI seto, richard/G-8467-2011; Duek, Eliana/J-2499-2012; Cumming, James/I-3358-2013; SAKURAI, HIROYOSHI/G-5085-2014; HAMAGAKI, HIDEKI/G-4899-2014; OI Cumming, James/0000-0001-6930-0958; Tannenbaum, Michael/0000-0002-8840-5314 NR 96 TC 42 Z9 42 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2663 EP 2678 DI 10.1103/PhysRevC.52.2663 PG 16 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600053 ER PT J AU BARRETTE, J BELLWIED, R BRAUNMUNZINGER, P CLELAND, WE CORMIER, T DADUSC, G DAVID, G DEE, J DIETZSCH, O FATYGA, M GREENE, SV GERMANI, JV HALL, JR HEMMICK, TK HERRMANN, N HOGUE, RW HONG, B JAYANANDA, K KRAUS, D KUMAR, BS LACASSE, R LISSAUER, D LLOPE, WJ LUDLAM, TW MAJKA, R MARK, SK MITCHELL, JT MUTHUSWAMY, M OBRIEN, E PRUNEAU, C ROTONDO, FS DASILVA, NC SIMONGILLO, J SONNADARA, U STACHEL, J TAKAI, H TAKAGUI, EM THROWE, TG WATERS, L WINTER, C WOLFE, D WOODY, CL XU, N ZHANG, Y ZHANG, Z ZOU, C AF BARRETTE, J BELLWIED, R BRAUNMUNZINGER, P CLELAND, WE CORMIER, T DADUSC, G DAVID, G DEE, J DIETZSCH, O FATYGA, M GREENE, SV GERMANI, JV HALL, JR HEMMICK, TK HERRMANN, N HOGUE, RW HONG, B JAYANANDA, K KRAUS, D KUMAR, BS LACASSE, R LISSAUER, D LLOPE, WJ LUDLAM, TW MAJKA, R MARK, SK MITCHELL, JT MUTHUSWAMY, M OBRIEN, E PRUNEAU, C ROTONDO, FS DASILVA, NC SIMONGILLO, J SONNADARA, U STACHEL, J TAKAI, H TAKAGUI, EM THROWE, TG WATERS, L WINTER, C WOLFE, D WOODY, CL XU, N ZHANG, Y ZHANG, Z ZOU, C TI SEARCH FOR PION-NEUTRON BOUND-STATES IN 14.6A GEV SI PLUS NUCLEUS COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID NEGATIVE PIONS; READOUT AB We have conducted a search for bound states of a negative pion and a number of neutrons (pineuts) using the E814 spectrometer. A beam of Si-28 at a momentum of 14.6A GeV/c was used to bombard targets of Al, Cu, Sn, and Pb. We describe our experimental technique, present measured upper limits for pineut production, and discuss the significance of our results. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. UNIV NEW MEXICO, ALBUQUERQUE, NM 87131 USA. UNIV PITTSBURGH, PITTSBURGH, PA 15260 USA. SUNY STONY BROOK, STONY BROOK, NY 11794 USA. UNIV SAO PAULO, BR-05508 SAO PAULO, BRAZIL. WAYNE STATE UNIV, DETROIT, MI 48202 USA. YALE UNIV, NEW HAVEN, CT 06520 USA. RP MCGILL UNIV, MONTREAL, PQ H3A 2K6, CANADA. RI Sonnadara, Upul/E-6359-2010; Takai, Helio/C-3301-2012 OI Takai, Helio/0000-0001-9253-8307 NR 26 TC 1 Z9 1 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2679 EP 2683 DI 10.1103/PhysRevC.52.2679 PG 5 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600054 ER PT J AU VIDEBAEK, F HANSEN, O AF VIDEBAEK, F HANSEN, O TI BARYON RAPIDITY LOSS AND MIDRAPIDITY STACKING IN HIGH-ENERGY NUCLEUS-NUCLEUS COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID GEV-C; PARTICLE-PRODUCTION; PP INTERACTIONS; PI+ AB Rapidity distributions of baryons from nucleus-nucleus, p-nucleus, and p-p interactions at 11.6, 14.6, and 200 GeV/c per nucleon incident momenta are reviewed. Average rapidity losses relative to the beam rapidity are derived in a consistent way and the systematics are described and discussed. The baryon multiplicities in the midrapidity region relative to simple geometrical sum rules are determined and the systematics of the opacity of the collisions are described. The main conclusions are that the average rapidity losses in central nucleus-nucleus collisions scale with the projectile rapidity and that the opacity of central collisions depends strongly on the size of the collision system and weakly on incident momentum. C1 UNIV COPENHAGEN,NIELS BOHR INST ASTRON PHYS & GEOPHYS,DK-2100 COPENHAGEN 0,DENMARK. RP VIDEBAEK, F (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 31 TC 51 Z9 51 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2684 EP 2693 DI 10.1103/PhysRevC.52.2684 PG 10 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600055 ER PT J AU CHAPMAN, S NIX, JR HEINZ, U AF CHAPMAN, S NIX, JR HEINZ, U TI EXTRACTING SOURCE PARAMETERS FROM GAUSSIAN FITS TO 2-PARTICLE CORRELATIONS SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; BOSE-EINSTEIN CORRELATIONS; HIGH-ENERGY COLLISIONS; GEV S+S COLLISIONS; PION INTERFEROMETRY; NUCLEAR COLLISIONS; HADRON AB Using a quadratic saddle-point approximation we show how information about a particle-emitting source can be extracted from Gaussian fits to two-particle correlation data. Although the formalism is completely general, extraction of the relevant parameters is much simpler for sources within an interesting class of azimuthally symmetric models. After discussing the standard fitting procedure we introduce a new Gaussian fitting procedure which is an azimuthally symmetric generalization of the Yano-Koonin formalism for spherically symmetric sources. This new fitting procedure has the advantage that in addition to being able to measure source parameters in a fixed frame or the longitudinally comoving system, it can also measure these parameters in the local rest frame of the source. C1 UNIV REGENSBURG,INST THEORET PHYS,D-93040 REGENSBURG,GERMANY. RP CHAPMAN, S (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 40 TC 105 Z9 105 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2694 EP 2703 DI 10.1103/PhysRevC.52.2694 PG 10 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600056 ER PT J AU WISSHAK, K VOSS, F KAPPELER, F GUBER, K KAZAKOV, L KORNILOV, N UHL, M REFFO, G AF WISSHAK, K VOSS, F KAPPELER, F GUBER, K KAZAKOV, L KORNILOV, N UHL, M REFFO, G TI STELLAR NEUTRON-CAPTURE CROSS-SECTIONS OF THE GD ISOTOPES SO PHYSICAL REVIEW C LA English DT Article ID GIANT BRANCH STARS; BARIUM FLUORIDE DETECTOR; SMALL CORE MASS; S-PROCESS; NUCLEOSYNTHESIS; SOLAR; ABUNDANCES; SM-151; TA-181; CARBON AB The neutron capture cross sections of Gd-152, Gd-154, Gd-155, Gd-156, Gd-157, and Gd-158 were measured in the energy range from 3 to 225 keV at the Karlsruhe 3.75 MV Van de Graaff accelerator. Neutrons were produced via the Li-7(p,n) Be-7 reaction by bombarding metallic Li targets with a pulsed proton beam. Capture events were registered with the Karlsruhe 4 pi Barium Fluoride Detector, which was improved by replacing crystals with high a background and by introducing a pierced crystal at zero degrees with respect to the beam axis. These changes resulted in a significantly increased efficiency for capture events. The main experimental problem was that the samples of the two s isotopes Gd-152 and Gd-154 showed only relatively low enrichment. Nevertheless, the spectroscopic quality of the BaF2 detector allowed evaluation of the corresponding corrections for isotopic impurities reliably. The cross section ratios could be determined with an overall uncertainty of typically 1%, an improvement by factors of five to ten compared to existing data. Severe discrepancies were found with respect to previous results. Maxwellian averaged neutron capture cross sections were calculated for thermal energies between kT = 10 keV and 100 keV. The new stellar cross sections were used for an updated analysis of the s-process reaction flow in the mass region between samarium and gadolinium, which is characterized by branchings at Sm-151, Eu-154, and Eu-155. With the classical approach, the s-process temperature could be constrained corresponding to a range of thermal energies between kT = 28 and 33 keV. The Gd-152 production in low mass stars was found to depend strongly on the neutron freeze-out at the end of the helium shell burning episodes. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. INST PHYS & POWER ENGN,OBNINSK,RUSSIA. INST RADIUMFORSCH & KERNPHYS,A-1090 VIENNA,AUSTRIA. ENEA,CTR DATI NUCL,I-40138 BOLOGNA,ITALY. RP WISSHAK, K (reprint author), FORSCHUNGSZENTRUM KARLSRUHE,INST KERNPHYS,POSTFACH 3640,D-76021 KARLSRUHE,GERMANY. NR 57 TC 56 Z9 56 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2762 EP 2779 DI 10.1103/PhysRevC.52.2762 PG 18 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600063 ER PT J AU CHADWICK, MB CHIBA, S NIITA, K MARUYAMA, T IWAMOTO, A AF CHADWICK, MB CHIBA, S NIITA, K MARUYAMA, T IWAMOTO, A TI QUANTUM MOLECULAR-DYNAMICS AND MULTISTEP-DIRECT ANALYSES OF MULTIPLE PREEQUILIBRIUM EMISSION SO PHYSICAL REVIEW C LA English DT Note ID HEAVY-ION COLLISIONS; FRAGMENT FORMATION AB We study multiple preequilibrium emission in nucleon induced reactions at intermediate energies, and compare quantum molecular dynamics (QMD) calculations wi th multistep-direct Feshbach-Kerman-Koonin results [M. B. Chadwick, P. G. Young, D. C. George, and Y. Watanabe, Phys. Rev. C 50, 996 (1994)]. When the theoretical expressions of this reference are reformulated so that the definitions of primary and multiple emission correspond to those used in QMD, the two theories yield similar results for primary and multiple preequilibrium emission. We use QMD as a tool to determine the multiplicities of fast preequilibrium nucleons as a function of incident energy. For fast particle cross sections to exceed 5% of the inclusive preequilibrium emission cross sections we find that two particles should be included in reactions above 50 MeV, three above about 180 MeV, and four are only needed when the incident energy exceeds about 400 MeV. C1 LAWRENCE LIVERMORE NATL LAB,DIV NUCL,LIVERMORE,CA 94550. NUCL ENERGY DATA CTR,TOKAI,IBARAKI 31911,JAPAN. RP CHADWICK, MB (reprint author), JAPAN ATOM ENERGY RES INST,ADV SCI RES CTR,TOKAI,IBARAKI 31911,JAPAN. NR 13 TC 17 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2800 EP 2803 DI 10.1103/PhysRevC.52.2800 PG 4 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600070 ER PT J AU HAYES, AC STERBENZ, SM AF HAYES, AC STERBENZ, SM TI 3-BODY RESONANCES IN HE-6, LI-6, AND BE-6, AND THE SOFT DIPOLE MODE PROBLEM OF NEUTRON HALO NUCLEI - COMMENT SO PHYSICAL REVIEW C LA English DT Letter ID ENERGY-LEVELS; LIGHT-NUCLEI AB In a recent publication Csoto suggests that the sequential decay of Li-11 through resonances in Li-10 could explain the peak seen at 1.2 MeV of excitation in the B-11(pi(-), pi(+)) reaction. We point out that this is in conflict with widely accepted notions of probe and target interactions in the measurement of inclusive excitation functions via nuclear reactions ranging from inelastic scattering and heavy-ion transfer reactions to pion double-charge exchange. We also show that the suggested mechanism leads to incorrect predictions in other nuclei, and so we conclude that the apparent success of the mechanism in explaining the observed energy of excited states in the Li-11 and He-6 systems is accidental. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP HAYES, AC (reprint author), AECL,CHALK RIVER LABS,CHALK RIVER,ON K0J 1J0,CANADA. NR 8 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD NOV PY 1995 VL 52 IS 5 BP 2807 EP 2808 DI 10.1103/PhysRevC.52.2807 PG 2 WC Physics, Nuclear SC Physics GA TF576 UT WOS:A1995TF57600072 ER PT J AU AHMAD, S BONNER, BE BUCHANAN, JA CHAN, CS CHIOU, CN CLEMENT, JM EISEMAN, SE EFSTATHIADIS, E ETKIN, A FOLEY, KJ HACKENBURG, RW HALLMAN, TJ KRAMER, MA LINDENBAUM, SJ LONGACRE, RS LOVE, WA MADANSKY, L MORRIS, TW MUTCHLER, GS PLATNER, ED SAULYS, AC ZHAO, K ZHU, Y AF AHMAD, S BONNER, BE BUCHANAN, JA CHAN, CS CHIOU, CN CLEMENT, JM EISEMAN, SE EFSTATHIADIS, E ETKIN, A FOLEY, KJ HACKENBURG, RW HALLMAN, TJ KRAMER, MA LINDENBAUM, SJ LONGACRE, RS LOVE, WA MADANSKY, L MORRIS, TW MUTCHLER, GS PLATNER, ED SAULYS, AC ZHAO, K ZHU, Y TI MEASUREMENT OF LOW M(T)K(S)(O) PRODUCTION FROM 14.6A GEV/C SI BEAMS ON A PB TARGET SO PHYSICAL REVIEW C LA English DT Note AB We present the measurement of low m(t)K(s)(0) production in the rapidity range 2.2 mu nu events recorded in an integrated luminosity of 19.7 pb(-1) gives M(W)(mu) = 80.310 +/- 0.205 (stat) +/- 0.130 (syst) GeV/c(2). A fit to the transverse mass spectrum ofa sample of 5718 W --> ev events recorded in 18.2 pb(-1) gives M(W)(e) = 80.490 +/- 0.145 (stat) +/- 0.175 (syst) GeV/c(2). Combining the muon and electron results, accounting for correlated uncertainties, yields Mw = 80.410 +/- 0.180 GeV/c(2). C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. UNIV BOLOGNA, IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. BRANDEIS UNIV, WALTHAM, MA 02254 USA. UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA. UNIV CHICAGO, CHICAGO, IL 60637 USA. DUKE UNIV, DURHAM, NC 27708 USA. FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY. HARVARD UNIV, CAMBRIDGE, MA 02138 USA. UNIV ILLINOIS, URBANA, IL 61801 USA. MCGILL UNIV, INST PARTICLE PHYS, MONTREAL, PQ H3A 2T8, CANADA. UNIV TORONTO, TORONTO, ON M5S 1A7, CANADA. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. MIT, CAMBRIDGE, MA 02139 USA. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. MICHIGAN STATE UNIV, E LANSING, MI 48824 USA. UNIV NEW MEXICO, ALBUQUERQUE, NM 87131 USA. OSAKA CITY UNIV, OSAKA 588, JAPAN. UNIV PADUA, IST NAZL FIS NUCL, SEZ PADOVA, I-35131 PADUA, ITALY. UNIV PENN, PHILADELPHIA, PA 19104 USA. UNIV PITTSBURGH, PITTSBURGH, PA 15260 USA. UNIV PISA, IST NAZL FIS NUCL, I-56100 PISA, ITALY. SCUOLA NORMALE SUPER PISA, I-56100 PISA, ITALY. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. UNIV ROCHESTER, ROCHESTER, NY 14627 USA. ROCKEFELLER UNIV, NEW YORK, NY 10021 USA. RUTGERS STATE UNIV, PISCATAWAY, NJ 08854 USA. ACAD SINICA, TAIPEI 11529, TAIWAN. SUPERCONDUCTING SUPER COLLIDER LAB, DALLAS, TX 75237 USA. TEXAS A&M UNIV, COLLEGE STN, TX 77843 USA. TEXAS TECH UNIV, LUBBOCK, TX 79409 USA. UNIV TSUKUBA, TSUKUBA, IBARAKI 305, JAPAN. TUFTS UNIV, MEDFORD, MA 02155 USA. UNIV WISCONSIN, MADISON, WI 53706 USA. YALE UNIV, NEW HAVEN, CT 06511 USA. RP NATL LAB HIGH ENERGY PHYS, KEK, 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; Tartarelli, Giuseppe Francesco/A-5629-2016; OI Produit, Nicolas/0000-0001-7138-7677; Gallinaro, Michele/0000-0003-1261-2277; Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Warburton, Andreas/0000-0002-2298-7315; 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; Paulini, Manfred/0000-0002-6714-5787; Turini, Nicola/0000-0002-9395-5230 NR 86 TC 129 Z9 129 U1 1 U2 6 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 NOV 1 PY 1995 VL 52 IS 9 BP 4784 EP 4827 DI 10.1103/PhysRevD.52.4784 PG 44 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900003 ER PT J AU ABE, K ABT, L AHN, CJ AKAGI, T ALLEN, NJ ASH, WW ASTON, D BAIRD, KG BALTAY, C BAND, HR BARAKAT, MB BARANKO, G BARDON, O BARKLOW, T BAZARKO, AO BENDAVID, R BENVENUTI, AC BIENZ, T BILEI, GM BISELLO, D BLAYLOCK, G BOGART, JR BOLTON, T BOWER, GR BRAN, JE BREIDENBACH, M BUGG, WM BURKE, D BURNETT, TH BURROWS, PN BUSZA, W CALCATERRA, A CALDWELL, DO CALLOWAY, D CAMANZI, B CARPINELLI, M CASSELL, R CASTALDI, R CASTRO, A CAVALLISFORZA, M CHURCH, E COHN, HO COLLER, JA COOK, V COTTON, R COWAN, RF COYNE, DG DOLIVEIRA, A DAMERELL, CJS DAOUDI, M DESANGRO, R DESIMONE, P DELLORSO, R DIMA, M DU, PYC DUBOIS, R EISENSTEIN, BI ELIA, R ETZION, E FALCIAI, D FERO, MJ FREY, R FURUNO, K GILLMAN, T GLADDING, G GONZALEZ, S HALLEWELL, GD HART, EL HASEGAWA, Y HEDGES, S HERTZBACH, SS HILDRETH, MD HUBER, J HUFFER, ME HUGHES, EW HWANG, H IWASAKI, Y JACKSON, DJ JACQUES, P JAROS, J JOHNSON, AS JOHNSON, JR JOHNSON, RA JUNK, T KAJIKAWA, R KALELKAR, M KANG, HJ KARLINER, L KAWAHARA, H KENDALL, HW KIM, Y KING, ME KING, R KOFLER, RR KRISHNA, NM KROEGER, RS LABS, JF LANGSTON, M LATH, A LAUBER, JA LEITH, DWG LIU, MX LIU, X LORETI, M LU, A LYNCH, HL MA, J MANCINELLI, G MANLY, S MANTOVANI, G MARKIEWICZ, TW MARUYAMA, T MASSETTI, R MASUDA, H MAZZUCATO, E MCKEMEY, AL MEADOWS, BT MESSNER, R MOCKETT, PM MOFFEIT, KC MOURS, B MULLER, G MULLER, D NAGAMINE, T NAUENBERG, U NEAL, H NUSSBAUM, M OHNISHI, Y OSBORNE, LS PANVINI, RS PARK, H PAVEL, TJ PERUZZI, J PICCOLO, M PIEMONTESE, J PIERONI, E PITTS, KT PLANO, RJ PREPOST, R PRESCOTT, CY PUNKAR, GD QUIGLEY, K RATCLIFF, BN REEVES, TW REIDY, K RENSING, PE ROCHESTER, LS ROTHBERG, JE ROWSON, PC RUSSELL, JJ SAXTON, OH SCHAFFNER, SF SCHALK, T SCHINDLER, RG SCHNEEKLOTH, U SCHUMM, BA SEIDEN, A SEN, S SERBO, VV SHAEVITZ, MH SHANK, JT SHAPIRO, G SHAPIRO, SL SHERDEN, DJ SHMAKOV, KD SIMOPOULOS, C SINEV, NB SMITH, SR SNYDER, JA STAMER, P STEINER, H STEINER, R STRAUSS, MG SU, D SUEKANE, F SUGIYAMA, A SUZUKI, S SWARTZ, M SZUMILO, A TAKAHASHI, T TAYLOR, FE TORRENCE, E TURK, JD USHER, T VAVRA, J VANNINI, C VELLA, E VENUTI, JP VERDIER, R VERDINI, PG WAGNER, SR WAITE, AP WATTS, SJ WEIDMANN, AW WEISS, ER WHITAKER, JS WHITE, SL WICKENS, FJ WILLIAMS, DA WILLIAMS, DC WILLIAMS, SH WILLOCQ, S WILSON, RJ WISNIEWSKI, WJ WOODS, M WORD, GB WYSS, J YAMAMOTO, RK YAMARTINO, JM YANG, X YELLIN, SJ YOUNG, CC YUTA, H ZAPALAC, G ZDARKO, RW ZEITLIN, C ZHANG, Z ZHOU, J AF ABE, K ABT, L AHN, CJ AKAGI, T ALLEN, NJ ASH, WW ASTON, D BAIRD, KG BALTAY, C BAND, HR BARAKAT, MB BARANKO, G BARDON, O BARKLOW, T BAZARKO, AO BENDAVID, R BENVENUTI, AC BIENZ, T BILEI, GM BISELLO, D BLAYLOCK, G BOGART, JR BOLTON, T BOWER, GR BRAN, JE BREIDENBACH, M BUGG, WM BURKE, D BURNETT, TH BURROWS, PN BUSZA, W CALCATERRA, A CALDWELL, DO CALLOWAY, D CAMANZI, B CARPINELLI, M CASSELL, R CASTALDI, R CASTRO, A CAVALLISFORZA, M CHURCH, E COHN, HO COLLER, JA COOK, V COTTON, R COWAN, RF COYNE, DG DOLIVEIRA, A DAMERELL, CJS DAOUDI, M DESANGRO, R DESIMONE, P DELLORSO, R DIMA, M DU, PYC DUBOIS, R EISENSTEIN, BI ELIA, R ETZION, E FALCIAI, D FERO, MJ FREY, R FURUNO, K GILLMAN, T GLADDING, G GONZALEZ, S HALLEWELL, GD HART, EL HASEGAWA, Y HEDGES, S HERTZBACH, SS HILDRETH, MD HUBER, J HUFFER, ME HUGHES, EW HWANG, H IWASAKI, Y JACKSON, DJ JACQUES, P JAROS, J JOHNSON, AS JOHNSON, JR JOHNSON, RA JUNK, T KAJIKAWA, R KALELKAR, M KANG, HJ KARLINER, L KAWAHARA, H KENDALL, HW KIM, Y KING, ME KING, R KOFLER, RR KRISHNA, NM KROEGER, RS LABS, JF LANGSTON, M LATH, A LAUBER, JA LEITH, DWG LIU, MX LIU, X LORETI, M LU, A LYNCH, HL MA, J MANCINELLI, G MANLY, S MANTOVANI, G MARKIEWICZ, TW MARUYAMA, T MASSETTI, R MASUDA, H MAZZUCATO, E MCKEMEY, AL MEADOWS, BT MESSNER, R MOCKETT, PM MOFFEIT, KC MOURS, B MULLER, G MULLER, D NAGAMINE, T NAUENBERG, U NEAL, H NUSSBAUM, M OHNISHI, Y OSBORNE, LS PANVINI, RS PARK, H PAVEL, TJ PERUZZI, J PICCOLO, M PIEMONTESE, J PIERONI, E PITTS, KT PLANO, RJ PREPOST, R PRESCOTT, CY PUNKAR, GD QUIGLEY, K RATCLIFF, BN REEVES, TW REIDY, K RENSING, PE ROCHESTER, LS ROTHBERG, JE ROWSON, PC RUSSELL, JJ SAXTON, OH SCHAFFNER, SF SCHALK, T SCHINDLER, RG SCHNEEKLOTH, U SCHUMM, BA SEIDEN, A SEN, S SERBO, VV SHAEVITZ, MH SHANK, JT SHAPIRO, G SHAPIRO, SL SHERDEN, DJ SHMAKOV, KD SIMOPOULOS, C SINEV, NB SMITH, SR SNYDER, JA STAMER, P STEINER, H STEINER, R STRAUSS, MG SU, D SUEKANE, F SUGIYAMA, A SUZUKI, S SWARTZ, M SZUMILO, A TAKAHASHI, T TAYLOR, FE TORRENCE, E TURK, JD USHER, T VAVRA, J VANNINI, C VELLA, E VENUTI, JP VERDIER, R VERDINI, PG WAGNER, SR WAITE, AP WATTS, SJ WEIDMANN, AW WEISS, ER WHITAKER, JS WHITE, SL WICKENS, FJ WILLIAMS, DA WILLIAMS, DC WILLIAMS, SH WILLOCQ, S WILSON, RJ WISNIEWSKI, WJ WOODS, M WORD, GB WYSS, J YAMAMOTO, RK YAMARTINO, JM YANG, X YELLIN, SJ YOUNG, CC YUTA, H ZAPALAC, G ZDARKO, RW ZEITLIN, C ZHANG, Z ZHOU, J TI MEASUREMENT OF THE TAU LIFETIME AT SLD SO PHYSICAL REVIEW D LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; LEPTON AB A measurement of the lifetime of the tau lepton has been made using a sample of 1671 Z(0) --> tau(+)tau(-) decays collected by the SLD detector at the SLC. The measurement benefits from the small and stable collision region at the SLC and the precision pixel vertex detector of the SLD. Three analysis techniques have been used: decay length, impact parameter, and impact parameter difference methods. The combined result is tau(tau) = 297 +/- 9(stat) +/- 5(syst) fs. C1 ADELPHI UNIV,GARDEN CITY,NY 11530. IST NAZL FIS NUCL,SEZ BOLOGNA,I-40126 BOLOGNA,ITALY. BOSTON UNIV,BOSTON,MA 02215. BRUNEL UNIV,UXBRIDGE UB8 3PH,MIDDX,ENGLAND. CALTECH,PASADENA,CA 91125. UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. UNIV CINCINNATI,CINCINNATI,OH 45221. COLORADO STATE UNIV,FT COLLINS,CO 80523. UNIV COLORADO,BOULDER,CO 80309. COLUMBIA UNIV,NEW YORK,NY 10027. IST NAZL FIS NUCL,SEZ FERRARA,I-44100 FERRARA,ITALY. UNIV FERRARA,I-44100 FERRARA,ITALY. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV ILLINOIS,URBANA,IL 61801. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MASSACHUSETTS,AMHERST,MA 01003. UNIV MISSISSIPPI,UNIVERSITY,MS 38677. NAGOYA UNIV,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN. UNIV OREGON,EUGENE,OR 97403. IST NAZL FIS NUCL,SEZ PADOVA,I-35100 PADUA,ITALY. UNIV PADUA,I-35100 PADUA,ITALY. IST NAZL FIS NUCL,SEZ PERUGIA,I-06100 PERUGIA,ITALY. UNIV PERUGIA,I-06100 PERUGIA,ITALY. IST NAZL FIS NUCL,SEZ PISA,I-56100 PISA,ITALY. UNIV PISA,I-56100 PISA,ITALY. RUTGERS STATE UNIV,PISCATAWAY,NJ 08855. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. SOGANG UNIV,SEOUL,SOUTH KOREA. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV TENNESSEE,KNOXVILLE,TN 37996. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV WASHINGTON,SEATTLE,WA 98195. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. UNIV GENOA,I-16126 GENOA,ITALY. RP ABE, K (reprint author), TOHOKU UNIV,SENDAI,MIYAGI 980,JAPAN. RI Schaffner, Stephen/D-1189-2011; de Sangro, Riccardo/J-2901-2012; de Simone, Patrizia/J-3549-2012; Cavalli-Sforza, Matteo/H-7102-2015; Frey, Raymond/E-2830-2016; Calcaterra, Alessandro/P-5260-2015; OI de Sangro, Riccardo/0000-0002-3808-5455; Frey, Raymond/0000-0003-0341-2636; Calcaterra, Alessandro/0000-0003-2670-4826; Wilson, Robert/0000-0002-8184-4103 NR 18 TC 14 Z9 14 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 1 PY 1995 VL 52 IS 9 BP 4828 EP 4838 DI 10.1103/PhysRevD.52.4828 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900004 ER PT J AU ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BLANFORD, G BORREANI, G BROEMMELSIEK, D BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, M DALPIAZ, P DALPIAZ, PF DIMITROYANNIS, D FABBRI, M FAST, J GIANOLI, A GINSBURG, CM GOLLWITZER, K GOVI, G HAHN, A HASAN, M HSUEH, S LEWIS, R LUPPI, E MACRI, M MAJEWSKA, AM MANDELKERN, M MARCHETTO, F MARINELLI, M MARQUES, KJ MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PALLAVICINI, M PASSAGGIO, S PASTRONE, N PATRIGNANI, C PEOPLES, J PETRUCCI, F PIA, MG PORDES, S RAPIDIS, P RAY, R REID, J RINAUDO, G ROCCUZZO, B ROSEN, J SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, A SMITH, GA SOZZI, M TROKENHEIM, S WEBER, MF WERKEMA, S ZHANG, Y ZHAO, J ZIOULAS, G AF ARMSTRONG, TA BETTONI, D BHARADWAJ, V BIINO, C BLANFORD, G BORREANI, G BROEMMELSIEK, D BUZZO, A CALABRESE, R CECCUCCI, A CESTER, R CHURCH, M DALPIAZ, P DALPIAZ, PF DIMITROYANNIS, D FABBRI, M FAST, J GIANOLI, A GINSBURG, CM GOLLWITZER, K GOVI, G HAHN, A HASAN, M HSUEH, S LEWIS, R LUPPI, E MACRI, M MAJEWSKA, AM MANDELKERN, M MARCHETTO, F MARINELLI, M MARQUES, KJ MARSH, W MARTINI, M MASUZAWA, M MENICHETTI, E MIGLIORI, A MUSSA, R PALESTINI, S PALLAVICINI, M PASSAGGIO, S PASTRONE, N PATRIGNANI, C PEOPLES, J PETRUCCI, F PIA, MG PORDES, S RAPIDIS, P RAY, R REID, J RINAUDO, G ROCCUZZO, B ROSEN, J SANTRONI, A SARMIENTO, M SAVRIE, M SCHULTZ, J SETH, KK SMITH, A SMITH, GA SOZZI, M TROKENHEIM, S WEBER, MF WERKEMA, S ZHANG, Y ZHAO, J ZIOULAS, G TI STUDY OF THE ETA(C)(1 S-1(O)) STATE OF CHARMONIUM FORMED IN PP ANNIHILATIONS AND A SEARCH FOR THE ETA'(C)(2 S-1(O)) SO PHYSICAL REVIEW D LA English DT Article ID HELICITY SELECTION-RULES; ETA-C PRODUCTION; TIME-LIKE REGION; 2-PHOTON COLLISIONS; RADIATIVE DECAY; PARTIAL-WIDTH; J/PSI; ETA-C->PHI-PHI; ETA-C(2980); CALORIMETER AB The E760 Collaboration performed an experiment in the Antiproton Accumulator at Fermilab to study the two photon decay of the eta(c)(1(1)S(0)) charmonium state formed in ($) over bar pp annihilations. This resulted in a new measurement of the mass M(eta c) = 2988.3(-3.1)(+3.3) MeV/c(2) and of the product B(eta(c) --> ($) over bar pp) x Gamma(eta(c) --> gamma gamma) = (8.1(-2.0)(+22.9)) eV. We performed a search for the process ($) over bar pp --> eta(c)'(2(1)S(0)) --> gamma gamma over a limited range of center-of-mass energies. Since no signal was observed, we derived upper limits on the product of branching ratios B(eta(c)' --> ($) over bar pp) x B(eta(c)' --> gamma gamma) in the center-of-mass energy range 3584 less than or equal to root s less than or equal to 3624 MeV. We observed no signal for the nonresonant process ($) over bar p + p --> gamma + gamma and obtain upper limits. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FERRARA,I-44100 FERRARA,ITALY. IST NAZL FIS NUCL,I-44100 FERRARA,ITALY. IST NAZL FIS NUCL,I-16146 GENOA,ITALY. UNIV GENOA,I-16146 GENOA,ITALY. UNIV CALIF IRVINE,IRVINE,CA 92717. NORTHWESTERN UNIV,EVANSTON,IL 60208. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TURIN,I-10125 TURIN,ITALY. RP ARMSTRONG, TA (reprint author), PENN STATE UNIV,UNIVERSITY PK,PA 16802, USA. RI Pia, Maria Grazia/C-7034-2012; Sozzi, Marco/H-1674-2011; Patrignani, Claudia/C-5223-2009; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Pallavicini, Marco/G-5500-2012; Gianoli, Alberto/H-5544-2015 OI Pia, Maria Grazia/0000-0002-3579-9639; Sozzi, Marco/0000-0002-2923-1465; Patrignani, Claudia/0000-0002-5882-1747; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Pallavicini, Marco/0000-0001-7309-3023; Gianoli, Alberto/0000-0002-2456-8667 NR 45 TC 58 Z9 58 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 1 PY 1995 VL 52 IS 9 BP 4839 EP 4854 DI 10.1103/PhysRevD.52.4839 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900005 ER PT J AU VANDENBRAND, JFJ ENT, R ANTHONY, PL ARNOLD, RG ARRINGTON, J BEISE, EJ BELZ, JE BOSTED, PE BULTEN, HJ CHAPMAN, MS COULTER, KP DIETRICH, FS EPSTEIN, M FILIPPONE, BW GAO, H GEARHART, RA GEESAMAN, DF HANSEN, JO HOLT, RJ JACKSON, HE JONES, CE KEPPEL, CE KINNEY, ER KUHN, S LEE, K LORENZON, W LUNG, A MAKINS, NCR MARGAZIOTIS, DJ MCKEOWN, RD MILNER, RG MUELLER, B NAPOLITANO, J NELSON, JK ONEILL, TG PAPAVASSILIOU, V PETRATOS, GG POTTERVELD, DH ROCK, SE SPENGOS, M SZALATA, ZM TAO, LH VANBIBBER, K WASSON, DA WHITE, JL ZEIDMAN, B AF VANDENBRAND, JFJ ENT, R ANTHONY, PL ARNOLD, RG ARRINGTON, J BEISE, EJ BELZ, JE BOSTED, PE BULTEN, HJ CHAPMAN, MS COULTER, KP DIETRICH, FS EPSTEIN, M FILIPPONE, BW GAO, H GEARHART, RA GEESAMAN, DF HANSEN, JO HOLT, RJ JACKSON, HE JONES, CE KEPPEL, CE KINNEY, ER KUHN, S LEE, K LORENZON, W LUNG, A MAKINS, NCR MARGAZIOTIS, DJ MCKEOWN, RD MILNER, RG MUELLER, B NAPOLITANO, J NELSON, JK ONEILL, TG PAPAVASSILIOU, V PETRATOS, GG POTTERVELD, DH ROCK, SE SPENGOS, M SZALATA, ZM TAO, LH VANBIBBER, K WASSON, DA WHITE, JL ZEIDMAN, B TI EVIDENCE FOR VIRTUAL COMPTON-SCATTERING FROM THE PROTON SO PHYSICAL REVIEW D LA English DT Article ID MAGNETIC FORM-FACTORS; (GEV/C)(2); Q(2)=1.75 AB In virtual Compton scattering an electron is scattered off a nucleon such that the nucleon emits a photon. We show that these events can be selected experimentally, and present the first evidence for virtual Compton scattering from the proton in data obtained at the Stanford Linear Accelerator Center. The angular and energy dependence of the data is well described by a calculation that includes the coherent sum of electron and proton radiation. C1 MIT,CAMBRIDGE,MA 02139. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. AMERICAN UNIV,DEPT PHYS,WASHINGTON,DC 20016. CALTECH,PASADENA,CA 91125. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. CALIF STATE UNIV LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90032. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309. STANFORD UNIV,STANFORD,CA 94305. RENSSELAER POLYTECH INST,DEPT PHYS,TROY,NY 12180. RP VANDENBRAND, JFJ (reprint author), UNIV WISCONSIN,DEPT PHYS,1150 UNIV AVE,MADISON,WI 53706, USA. RI Gao, Haiyan/G-2589-2011; Arrington, John/D-1116-2012; Holt, Roy/E-5803-2011; Chapman, Michael/C-1929-2014 OI Arrington, John/0000-0002-0702-1328; Chapman, Michael/0000-0003-4424-0156 NR 28 TC 9 Z9 9 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 1 PY 1995 VL 52 IS 9 BP 4868 EP 4871 DI 10.1103/PhysRevD.52.4868 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900008 ER PT J AU ABACHI, S ABBOTT, B ABOLINS, M ACHARYA, BS ADAM, I ADAMS, DL ADMAS, M AHN, S AIHARA, H ALITTI, J ALVAREZ, G ALVES, GA AMIDI, E AMOS, N ANDERSON, EW ARONSON, SH ASTUR, R AVERY, G BADEN, A BALAMURALI, V BALDERSTON, J BALDIN, B BANTLY, J BARTLETT, JF BAZIZI, K BENDICH, J BERI, SB BERTRAM, L BEZZUBOV, VA BHAT, PC BHATNAGAR, V BHATTACHARJEE, M BISCHOFF, A BISWAS, N BLAZEY, G BLESSING, S BLOOM, P 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, MAC 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 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 FUESS, S GALJAEV, AN GALLAS, E GAO, CS GAO, S GELD, TL GENIK, RJ GENSER, K GERGER, CE GIBBARD, B GLAUBMAN, M 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 GRUNDBERG, P GRUNENDAHL, S GU, W 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, ML 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, LV 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 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 RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H 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 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 WOMERSLEY, J WON, E WOOD, DR XU, H YAMADA, R YAMIN, P YANAGISAWA, C YANG, K YASUDA, T YOSHIKAWA, C YOUSSEF, S YU, J YU, Y ZHANG, Y ZHOU, YH ZHU, Q ZHU, YS ZHU, ZH ZIEMINSKA, D ZIEMINSKI, A ZYLBERSTEJN, A AF ABACHI, S ABBOTT, B ABOLINS, M ACHARYA, BS ADAM, I ADAMS, DL ADMAS, M AHN, S AIHARA, H ALITTI, J ALVAREZ, G ALVES, GA AMIDI, E AMOS, N ANDERSON, EW ARONSON, SH ASTUR, R AVERY, G BADEN, A BALAMURALI, V BALDERSTON, J BALDIN, B BANTLY, J BARTLETT, JF BAZIZI, K BENDICH, J BERI, SB BERTRAM, L BEZZUBOV, VA BHAT, PC BHATNAGAR, V BHATTACHARJEE, M BISCHOFF, A BISWAS, N BLAZEY, G BLESSING, S BLOOM, P 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, MAC 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 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 FUESS, S GALJAEV, AN GALLAS, E GAO, CS GAO, S GELD, TL GENIK, RJ GENSER, K GERGER, CE GIBBARD, B GLAUBMAN, M 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 GRUNDBERG, P GRUNENDAHL, S GU, W 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, ML 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, LV 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 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 RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H 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 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 WOMERSLEY, J WON, E WOOD, DR XU, H YAMADA, R YAMIN, P YANAGISAWA, C YANG, K YASUDA, T YOSHIKAWA, C YOUSSEF, S YU, J YU, Y ZHANG, Y ZHOU, YH ZHU, Q ZHU, YS ZHU, ZH ZIEMINSKA, D ZIEMINSKI, A ZYLBERSTEJN, A TI TOP-QUARK SEARCH WITH THE D0 1992-1993 DATA SAMPLE SO PHYSICAL REVIEW D LA English DT Article ID SEMILEPTONIC NEUTRINO SCATTERING; PROTON-ANTIPROTON COLLISIONS; ELECTROWEAK MIXING ANGLE; PRECISE DETERMINATION; FERMILAB TEVATRON; STANDARD MODEL; HEAVY QUARKS; MONTE-CARLO; COLLIDER; LIMIT AB We present results on the search for the top quark in p ($) over bar p collisions at root s = 1.8 TeV with an integrated luminosity of 13.5 +/- 1.6 pb(-1). We have considered t ($) over bar t production in the standard model using electron and muon dilepton decay channels (t ($) over bar t --> e mu + jets, ee + jets, and mu mu + jets) and single-lepton decay channels (t ($) over bar t --> e + jets and mu + jets) with and without tagging of b quark jets. An analysis of these data optimized for top quark masses below 140 GeV/c(2) gives a lower top quark mass limit of 128 GeV/c(2). An analysis optimized for higher top quark masses yields a events with an expected background of 3.8 +/- 0.9. If we assume that the excess is due to t ($) over bar t production, and assuming a top mass of 180 GeV/c(2), we obtain a cross section of 8.2 +/- 5.1 pb. 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,FIS EXPTL ALTAS ENERGIAS & COSMOL LAB,RIO JANEIRO,BRAZIL. INST POLITECN NACL,CTR INVEST & ESTUDIOS 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 60607. INDIANA UNIV,BLOOMINGTON,IN 47405. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. KOREA UNIV,SEOUL 136701,SOUTH KOREA. KYUNGSUNG UNIV,PUSAN,SOUTH KOREA. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,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. PANJAB UNIV,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. CENS,CEA,DEPT ASTROPHYS,SERV PHYS PARTICULES,GIF SUR YVETTE,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. CONSEJO NACL INVEST CIENT & TECN,SANTA FE,ARGENTINA. IHEP,BEIJING,PEOPLES R CHINA. UNIV BUENOS AIRES,BUENOS AIRES,DF,ARGENTINA. UNIV SAN FRANCISCO,QUITO,ECUADOR. RP ABACHI, S (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. RI Alves, Gilvan/C-4007-2013; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015; de Mello Neto, Joao/C-5822-2013; Taketani, Atsushi/E-1803-2017; 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 OI Kim, Sun Kee/0000-0002-0013-0775; de Mello Neto, Joao/0000-0002-3234-6634; Taketani, Atsushi/0000-0002-4776-2315; Aihara, Hiroaki/0000-0002-1907-5964; Klyukhin, Vyacheslav/0000-0002-8577-6531; De, Kaushik/0000-0002-5647-4489; NR 79 TC 79 Z9 79 U1 1 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD NOV 1 PY 1995 VL 52 IS 9 BP 4877 EP 4919 DI 10.1103/PhysRevD.52.4877 PG 43 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900010 ER PT J AU BRODSKY, SJ RIZZO, RG SCHMIDT, I AF BRODSKY, SJ RIZZO, RG SCHMIDT, I TI W ANOMALOUS MOMENTS AND THE POLARIZATION ASYMMETRY ZERO IN GAMMA-E-]W-NU SO PHYSICAL REVIEW D LA English DT Article ID ELECTRIC-DIPOLE MOMENT; TAU-LEPTON; E+E COLLIDER; BOSON; GAMMA; 500-GEV AB We show from general principles that there must be a center-of-mass energy root s(0) where the polarization asymmetry A = Delta sigma(gamma e --> Wv)/sigma(gamma e --> Wv) for circularly polarized photon and electron beams vanishes. In the case of the standard model, the crossing point where the asymmetry changes sign occurs in Born approximation at root s(gamma e) = 3.1583 ... Mw similar or equal to 254 GeV. We demonstrate the sensitivity of the position of the polarization asymmetry zero to modification of the SM trilinear gamma WW coupling. Given reasonable assumptions for the luminosity and energy range for the Next Linear Collider with a backscattered laser beam, we show that the zero point, root s(0), of the polarization asymmetry may be determined with sufficient precision to constrain the anomalous couplings of the W to better than the 1% level at 95% C.L. In addition to the fact that only a limited range of energy is required, the polarization asymmetry measurements have the important advantage that many of the systematic errors cancel in taking cross section ratios. The position of the zero thus provides an additional weapon in the arsenal used to probe anomalous trilinear gauge couplings. C1 UNIV TECN FEDERICO SANTA MARIA, VALPARAISO, CHILE. RP STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. RI Schmidt, Ivan/J-5920-2012 NR 51 TC 24 Z9 24 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 NOV 1 PY 1995 VL 52 IS 9 BP 4929 EP 4935 DI 10.1103/PhysRevD.52.4929 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900012 ER PT J AU BARNES, T CLOSE, FE SWANSON, ES AF BARNES, T CLOSE, FE SWANSON, ES TI HYBRID AND CONVENTIONAL MESONS IN THE FLUX TUBE MODEL - NUMERICAL-STUDIES AND THEIR PHENOMENOLOGICAL IMPLICATIONS SO PHYSICAL REVIEW D LA English DT Article ID QCD SUM-RULES; LATTICE GAUGE-THEORY; MIT BAG MODEL; EXOTIC MESONS; QQBARG HYBRID; HERMAPHRODITE MESONS; JPC =1-+; HADRONS; QUARK; EXCITATIONS AB We present results from analytical and numerical studies of a flux tube model of hybrid mesons. Our numerical results use a Hamiltonian Monte Carlo algorithm and so improve on previous analytical treatments, which assumed small flux tube oscillations and an adiabatic separation of quark and flux tube motion. We find that the small oscillation approximation is inappropriate for typical hadrons and that the hybrid mass is underestimated by the adiabatic approximation. For physical parameters in the ''one-bead'' flux tube model we estimate the lightest hybrid masses ((Lambda)L = P-1 states) to be 1.8-1.9 GeV for u ($) over bar u hybrids, 2.1-2.2 GeV for s ($) over bar s, and 4.1-4.2 GeV for c ($) over bar c We also determine masses of conventional q ($) over bar q mesons with L = 0 to L = 3 in this model, and confirm good agreement with experimental J-averaged multiplet masses. Mass estimates are also given for hybrids with higher orbital and flux tube excitations, The gap from the lightest hybrid level (P-1) to the first hybrid orbital excitation (D-1) is predicted to be approximate to 0.4 GeV for light quarks (q = u, d) and approximate to 0.3 GeV for q = c. Both P-1 and D-1 hybrid multiplets contain the exotics 1(-+) and 2(+-); in addition the P-1 has a 0(+-) and the D-1 contains a 3(-+). Hybrid mesons with doubly excited hwr tubes are also considered. The implications of our results for spectroscopy are discussed, with emphasis on charmonium hybrids, which may be accessible at facilties such as BEPC KEK, a Tan-Charm Factory, and in psi production at hadron colliders. C1 UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA. DARESBURY RUTHERFORD APPLETON LAB, CHILTON OX11 0QX, ENGLAND. N CAROLINA STATE UNIV, DEPT PHYS, RALEIGH, NC 27695 USA. RP OAK RIDGE NATL LAB, COMPUTAT & THEROET PHYS GRP, OAK RIDGE, TN 37831 USA. NR 76 TC 177 Z9 180 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD NOV 1 PY 1995 VL 52 IS 9 BP 5242 EP 5256 DI 10.1103/PhysRevD.52.5242 PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TC379 UT WOS:A1995TC37900043 ER PT J AU KUM, O HOOVER, WG POSCH, HA AF KUM, O HOOVER, WG POSCH, HA TI VISCOUS CONDUCTING FLOWS WITH SMOOTH-PARTICLE APPLIED MECHANICS SO PHYSICAL REVIEW E LA English DT Article ID RAYLEIGH-BENARD CONVECTION; MOLECULAR-DYNAMICS; HYDRODYNAMICS AB Smooth-particle methods have a 20-year history of solving complex problems in fluid and solid mechanics. Here we first discuss the method, pointing out an interesting and fruitful parallel linking smooth-particle methods to atomistic molecular dynamics. We then assess the accuracy and applicability of the method by comparing a set of smooth-particle Rayleigh-Benard problems, all in the laminar regime, to corresponding highly accurate grid-based numerical solutions of the continuum equations. Both transient and stationary smooth-particle solutions reproduce the grid-based data with velocity errors on the order of a few percent. C1 UNIV VIENNA, INST EXPTL PHYS, A-1090 VIENNA, AUSTRIA. RP UNIV CALIF DAVIS, UNIV CALIF LAWRENCE LIVERMORE NATL LAB, DEPT APPL SCI, LIVERMORE, CA 94551 USA. NR 15 TC 52 Z9 52 U1 0 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD NOV PY 1995 VL 52 IS 5 BP 4899 EP 4908 DI 10.1103/PhysRevE.52.4899 PN A PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TG336 UT WOS:A1995TG33600043 ER PT J AU PIOVELLA, N CHAIX, P SHVETS, G JAROSZYNSKI, DA AF PIOVELLA, N CHAIX, P SHVETS, G JAROSZYNSKI, DA TI ANALYTICAL THEORY OF SHORT-PULSE FREE-ELECTRON LASER-OSCILLATORS SO PHYSICAL REVIEW E LA English DT Article ID PROPAGATION; REGIME; FELIX AB A simple model for the nonlinear evolution of a short-pulse free-electron laser oscillator in the small gain regime is derived. An analysis of the linearized system allows the definition and calculation of the eigenmodes characterizing the small signal regime. An arbitrary solution of the nonlinear system can then be expanded in terms of these supermodes. In the single-supermode approximation, the system reduces to a Landau-Ginzburg equation, which allows the efficiency and saturated power to be obtained as functions of cavity detuning and cavity losses. In the limit of small. cavity detuning, electrons emit superradiantly, with an efficiency inversely proportional to the number of radiation wavelengths within the optical pulse, and power proportional to the square of the bunch charge. In the multisupermode regime, limit cycles and period doubling behavior are observed and interpreted as a competition between supermodes. Finally, the analytical and numerical results are compared with the experimental observations from the Free-Electron Laser for Infrared eXperiments experiment. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP PIOVELLA, N (reprint author), CEA,SERV PHYS & TECH NUCL,BOITE POSTALE 12,F-91680 BRUYERES CHATEL,FRANCE. NR 38 TC 66 Z9 69 U1 2 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD NOV PY 1995 VL 52 IS 5 BP 5470 EP 5486 DI 10.1103/PhysRevE.52.5470 PN B PG 17 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TG337 UT WOS:A1995TG33700043 ER PT J AU RAUBENHEIMER, TO ZIMMERMANN, F AF RAUBENHEIMER, TO ZIMMERMANN, F TI FAST BEAM-ION INSTABILITY .1. LINEAR-THEORY AND SIMULATIONS SO PHYSICAL REVIEW E LA English DT Article AB The interaction of an electron beam with residual gas ions results in mutually driven transverse oscillations. This effect arises during the passage of a single train of bunches. An equivalent instability mechanism is encountered in positron beams where ionization electrons oscillate within a single bunch. In either case, the oscillations grow exponentially with an exponent proportional to t(1/2). In this paper, the rise time of the instability is calculated analytically by a perturbation series approach and is compared with computer simulations. Growth rates are evaluated for several existing or proposed storage rings and linear accelerators; the effect considered could be a significant limitation in many of the future designs. RP RAUBENHEIMER, TO (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 22 TC 56 Z9 56 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD NOV PY 1995 VL 52 IS 5 BP 5487 EP 5498 DI 10.1103/PhysRevE.52.5487 PN B PG 12 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TG337 UT WOS:A1995TG33700044 ER PT J AU STUPAKOV, GV RAUBENHEIMER, TO ZIMMERMANN, F AF STUPAKOV, GV RAUBENHEIMER, TO ZIMMERMANN, F TI FAST BEAM-ION INSTABILITY .2. EFFECT OF ION DECOHERENCE SO PHYSICAL REVIEW E LA English DT Article AB The ionization of residual gas by an electron beam in an accelerator generates ions that can resonantly couple to the beam through a wave propagating in the beam-ion system. A beam-ion instability is studied for a multibunch train, taking into account the decoherence of ion oscillations due to the ion frequency spread. It is shown that while the decoherence does not completely suppress the instability, it makes the growth rate smaller. A comparison of analytical and numerical results indicates good agreement with direct macroparticle simulation of the instability. RP STUPAKOV, GV (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,POB 4349,STANFORD,CA 94309, USA. NR 4 TC 32 Z9 32 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD NOV PY 1995 VL 52 IS 5 BP 5499 EP 5504 DI 10.1103/PhysRevE.52.5499 PN B PG 6 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TG337 UT WOS:A1995TG33700045 ER PT J AU LIN, Z LEE, WW AF LIN, Z LEE, WW TI METHOD FOR SOLVING THE GYROKINETIC POISSON EQUATION IN GENERAL GEOMETRY SO PHYSICAL REVIEW E LA English DT Article ID PARTICLE SIMULATION AB A generalized gyrokinetic Poisson solver has been developed and implemented in gyrokinetic particle simulation of low frequency microinstabilities in magnetic fusion plasmas. This technique employs local operations in the configuration space to compute the polarization density response and automatically takes into account the background profile effects contained in the gyrokinetic Poisson equation. It is useful for the global gyrokinetic simulation of magnetized plasmas in general equilibria, where the traditional spectral method is not applicable. The numerical scheme is also most amenable to massively parallel algorithms. RP LIN, Z (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 7 TC 50 Z9 50 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD NOV PY 1995 VL 52 IS 5 BP 5646 EP 5652 DI 10.1103/PhysRevE.52.5646 PN B PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA TG337 UT WOS:A1995TG33700061 ER PT J AU LINDL, J AF LINDL, J TI DEVELOPMENT OF THE INDIRECT-DRIVE APPROACH TO INERTIAL CONFINEMENT FUSION AND THE TARGET PHYSICS BASIS FOR IGNITION AND GAIN SO PHYSICS OF PLASMAS LA English DT Review ID RAYLEIGH-TAYLOR INSTABILITY; SCALE-LENGTH PLASMAS; 0.44-MU-M LASER-LIGHT; X-RAY GENERATION; HYDRODYNAMIC INSTABILITIES; SPATIAL INCOHERENCE; DENSE MATTER; RADIATION; CAVITY; NOVA AB Inertial confinement fusion (ICF) is an approach to fusion that relies on the inertia of the fuel mass to provide confinement. To achieve conditions under which inertial confinement is sufficient for efficient thermonuclear burn, a capsule (generally a spherical shell) containing thermonuclear fuel is compressed in an implosion process to conditions of high density and temperature. ICF capsules rely on either electron conduction (direct drive) or x rays (indirect drive) for energy transport to drive an implosion. In direct drive, the laser beams (or charged particle beams) are aimed directly at a target. The laser energy is transferred to electrons by means of inverse bremsstrahlung or a variety of plasma collective processes. In indirect drive, the driver energy (from laser beams or ion beams) is first absorbed in a high-Z enclosure (a hohlraum), which surrounds the capsule. The material heated by the driver emits x rays, which drive the capsule implosion. For optimally designed targets, 70%-80% of the driver energy can be converted to x rays. The optimal hohlraum geometry depends on the driver. Because of relaxed requirements on laser beam uniformity, and reduced sensitivity to hydrodynamic instabilities, the U.S. ICF Program has concentrated most of its effort since 1976 on the x-ray or indirect-drive approach to ICF. As a result of years of experiments and modeling, we are building an increasingly strong case for achieving ignition by indirect drive on the proposed National Ignition Facility (NIF). The ignition target requirements for hohlraum energetics, radiation symmetry hydrodynamic instabilities and mix, laser plasma interaction, pulse shaping, and ignition requirements are al consistent with experiments. The NIF laser design, at 1.8 MJ and 500 TW, has the margin to cover uncertainties in the baseline ignition targets. In addition, data from the NIF will provide a solid database for ion-beam-driven hohlraums being considered for future energy applications. In this paper we analyze the requirements for indirect drive ICF and review the theoretical and experimental basis for these requirements. Although significant parts of the discussion apply to both direct and indirect drive, the principal focus is on indirect drive. (C) 1995 American Institute of Physics. RP LINDL, J (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 261 TC 1510 Z9 1601 U1 27 U2 198 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 NOV PY 1995 VL 2 IS 11 BP 3933 EP 4024 DI 10.1063/1.871025 PG 92 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900001 ER PT J AU MATTOR, N COHEN, RH AF MATTOR, N COHEN, RH TI HOW FLUCTUATIONS CONTINUE THROUGH AN X-POINT SO PHYSICS OF PLASMAS LA English DT Article ID MODE; STABILITY AB The structure of waves around a magnetic X point is analyzed. A paradox is noted, in which theory implies that waves cannot propagate along the field past an X point, but experiment shows that they do anyway. The paradox may arise from the theoretical ''eikonal in the perpendicular direction'' ansatz, in which waves follow field lines to lowest order. This paper demonstrates that waves can encounter a boundary layer in which this ansatz is violated. Such waves can propagate around the X-point region, thus avoiding the large wave number increase from magnetic shear, allowing them to correlate through such a region, This result has some unexpected implications concerning mode structure in the edge and scrape-off layer of a diverted tokamak, and possibly for the core as well. (C) 1995 American Institute of Physics. RP MATTOR, N (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 22 TC 8 Z9 8 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD NOV PY 1995 VL 2 IS 11 BP 4042 EP 4048 DI 10.1063/1.871027 PG 7 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900003 ER PT J AU ONO, M AF ONO, M TI HIGH HARMONIC FAST WAVES IN HIGH-BETA PLASMAS SO PHYSICS OF PLASMAS LA English DT Article ID CURRENT DRIVE; TOKAMAK; RANGE AB High harmonic fast magnetosonic waves in high beta plasmas are investigated. In the high beta regime, a combination of reduced group velocity and a high beta enhancement of magnetic pumping lead to such large values of electron absorption that one can expect strong (approximate to 100%) single pass absorption. In particular, by controlling the wave spectrum, the prospect of localized electron heating and current drive appears to be feasible in high beta low-aspect-ratio tokamak regimes. Inclusion of finite-larmor-radius terms reveals an accessibility limit in the high ion beta regime (beta(1) approximate to 50% for a deuterium plasma) due to mode conversion into an ion-Bernstein-wave-like mode. No similar beta limit is expected for electrons. With increasing ion beta, the ion damping can increase significantly, particularly near the mode-conversion accessibility limit. The presence of an energetic ion component expected during intense neutral beam injection and ct heating does not appear to modify the accessibility condition nor cause excessive wave absorption by the energetic ions. (C) 1995 American Institute of Physics. RP ONO, M (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 21 TC 90 Z9 90 U1 1 U2 4 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 NOV PY 1995 VL 2 IS 11 BP 4075 EP 4082 DI 10.1063/1.871030 PG 8 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900006 ER PT J AU COHEN, RH RYUTOV, DD AF COHEN, RH RYUTOV, DD TI SPREADING PARTICLE TRAJECTORIES NEAR A PERFECTLY REFLECTING SURFACE IN A TILTED MAGNETIC-FIELD SO PHYSICS OF PLASMAS LA English DT Article ID PLASMA; SHEATH AB A description is given for electron trajectories near a specularly reflecting surface in a magnetic field that intersects the surface at a shallow angle. A simple analytical theory of electron motion is presented. It is shown that an electron experiences a large number of reflections from the wall and makes a long path along the surface, before eventually returning to the plasma. The importance of this phenomenon for the sheath structure and electron cross-field transport is briefly discussed. (C) 1995 American Institute of Physics. RP COHEN, RH (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 7 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD NOV PY 1995 VL 2 IS 11 BP 4118 EP 4121 DI 10.1063/1.871034 PG 4 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900010 ER PT J AU LIN, CH CHAO, JK CHENG, CZ AF LIN, CH CHAO, JK CHENG, CZ TI ONE-DIMENSIONAL VLASOV SIMULATIONS OF LANGMUIR SOLITONS SO PHYSICS OF PLASMAS LA English DT Article ID LOCALIZED ELECTRIC-FIELDS; COLLAPSE; EQUATION; PLASMAS AB Interactions of Langmuir solitons with plasma are simulated using a one-dimensional electrostatic Vlasov code, including both electrons and ions. The Zakharov's solutions are used as initial conditions. The wave is found to transfer energy into electrons during the heating process due to the interaction of resonant electrons with high-frequency electric fields. For T-e much greater than T-i, the temporal evolution of the electron distribution function shows different heating behaviors depending on whether the electrons are interacting with a single soliton or many solitons. In single-soliton interactions, the final electron distribution function approaches an exponential form, f(upsilon)proportional to exp(-6 upsilon/upsilon(te)). However, for multisoliton interactions, the final stage of the heated electrons establishes a power-law distribution function, f(upsilon)proportional to upsilon(-4), which agrees with that of Gorev and Kingsep [Sov. Phys. JETP 39, 1008 (1974)]. Simulation results for soliton motion show strong ion Landau damping, such that the solitons dissipated quickly when T-i = T-e. Analyses indicate that nonlinear damping of Langmuir solitons by thermal ions for upsilon(g) less than or equal to upsilon(ti) plays the most important role in slowing down the moving solitons. A double-hump structure was also found in the near-sonic soliton motion. (C) 1995 American Institute of Physics. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP LIN, CH (reprint author), NATL CENT UNIV,INST SPACE SCI,CHUNGLI 32054,TAIWAN. RI Cheng, Chio/K-1005-2014 NR 14 TC 6 Z9 6 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD NOV PY 1995 VL 2 IS 11 BP 4195 EP 4203 DI 10.1063/1.871045 PG 9 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900021 ER PT J AU FREDRICKSON, ED MCGUIRE, K CHANG, Z JANOS, A BELL, M BUDNY, RV BUSH, CE MANICKAM, J MYNICK, H NAZIKIAN, R TAYLOR, G AF FREDRICKSON, ED MCGUIRE, K CHANG, Z JANOS, A BELL, M BUDNY, RV BUSH, CE MANICKAM, J MYNICK, H NAZIKIAN, R TAYLOR, G TI BETA-LIMIT DISRUPTIONS IN THE TOKAMAK-FUSION-TEST-REACTOR SO PHYSICS OF PLASMAS LA English DT Article ID TFTR; CONFINEMENT; STABILITY; PLASMAS AB A disruptive beta limit (beta=plasma pressure/magnetic pressure) is observed in high-performance plasmas in the Tokamak Fusion Test Reactor (TFTR) [K. M. McGuire et al., Plasma Phys. Controlled Nuclear Fusion 1, 421 (1987)1]. The magnetohydrodynamic character of these disruptions differs substantially from the disruptions in high-density plasmas (density limit disruptions) on TFTR. The high beta disruptions can occur with less than a millisecond warning in the form of a fast growing precursor. The precursor appears to be an n=1 kink strongly coupled through finite beta effects and toroidal terms to higher m components. It does not have the ''cold bubble'' structure found in density limit disruptions. The n=1 kink, in turn, appears to excite a ballooning-type mode that may contribute to the thermal quench. (C) 1995 American Institute of Physics. RP FREDRICKSON, ED (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08540, USA. NR 37 TC 34 Z9 34 U1 2 U2 4 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 NOV PY 1995 VL 2 IS 11 BP 4216 EP 4229 DI 10.1063/1.871047 PG 14 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900023 ER PT J AU MANSFIELD, DK STRACHAN, JD BELL, MG SCOTT, SD BUDNY, R MARMAR, ES SNIPES, JA TERRY, JL BATHA, S BELL, RE BITTER, M BUSH, CE CHANG, Z DARROW, DS ERNST, D FREDRICKSON, E GREK, B HERRMANN, HW HILL, KW JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC LEVINTON, FW MIKKELSEN, DR MUELLER, D OWENS, DK PARK, H RAMSEY, AT ROQUEMORE, AL SKINNER, CH STEVENSON, T STRATTON, BC SYNAKOWSKI, E TAYLOR, G VONHALLE, A VONGOELER, S WONG, KL ZWEBEN, SJ AF MANSFIELD, DK STRACHAN, JD BELL, MG SCOTT, SD BUDNY, R MARMAR, ES SNIPES, JA TERRY, JL BATHA, S BELL, RE BITTER, M BUSH, CE CHANG, Z DARROW, DS ERNST, D FREDRICKSON, E GREK, B HERRMANN, HW HILL, KW JANOS, A JASSBY, DL JOBES, FC JOHNSON, DW JOHNSON, LC LEVINTON, FW MIKKELSEN, DR MUELLER, D OWENS, DK PARK, H RAMSEY, AT ROQUEMORE, AL SKINNER, CH STEVENSON, T STRATTON, BC SYNAKOWSKI, E TAYLOR, G VONHALLE, A VONGOELER, S WONG, KL ZWEBEN, SJ TI ENHANCED PERFORMANCE OF DEUTERIUM-TRITIUM-FUELED SUPERSHOTS USING EXTENSIVE LITHIUM CONDITIONING IN THE TOKAMAK-FUSION-TEST-REACTOR SO PHYSICS OF PLASMAS LA English DT Article ID TFTR; EMISSION AB In the Tokamak Fusion Test Reactor (TFTR) [K. M. McGuire et al., Phys. Plasmas 2, 2176 (1995)] a substantial improvement in fusion performance has been realized by combining the enhanced confinement due to tritium fueling with the enhanced confinement due to extensive conditioning of the limiter with lithium. This combination has resulted in not only significantly higher global energy confinement times than have previously been obtained in high current supershots, but also in the highest central ratio of thermonuclear fusion output power to input power observed to date. (C) 1995 American Institute of Physics. C1 MIT,CAMBRIDGE,MA 02139. FUS PHYS & TECHNOL,TORRANCE,CA 90503. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV WISCONSIN,MADISON,WI 53706. RI Ernst, Darin/A-1487-2010 OI Ernst, Darin/0000-0002-9577-2809 NR 20 TC 31 Z9 31 U1 1 U2 5 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 NOV PY 1995 VL 2 IS 11 BP 4252 EP 4256 DI 10.1063/1.871050 PG 5 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900027 ER PT J AU NAITOU, H TSUDA, K LEE, WW SYDORA, RD AF NAITOU, H TSUDA, K LEE, WW SYDORA, RD TI GYROKINETIC SIMULATION OF INTERNAL KINK MODES SO PHYSICS OF PLASMAS LA English DT Article ID PARTICLE SIMULATION; TOKAMAK; PLASMA; EQUATIONS; JET AB Internal disruption in a tokamak has been simulated using a three-dimensional magneto-inductive gyrokinetic particle code. The code operates in both the standard gyrokinetic mode (total-f code) and the fully nonlinear characteristic mode (delta f code). The latter is a quiet low noise algorithm. The computational model represents a straight tokamak with periodic boundary conditions in the toroidal direction and a square cross section with perfectly conducting walls in the poloidal direction. The linear mode structure of an unstable m = 1 (poloidal) and n = 1 (toroidal) kinetic internal kink mode is clearly observed, especially in the delta f code. The width of the current layer around the x-point, where magnetic reconnection occurs, is found to be close to the collisionless electron skin depth, indicating the importance of electron inertia. Both codes give very similar nonlinear results, in which full reconnection in the Alfven time scale is observed along with the electrostatic potential structures created during this phase. The resulting ExB drift from the potential dominates the nonlinear phase after the full reconnection. (C) 1995 American Institute of Physics. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP NAITOU, H (reprint author), YAMAGUCHI UNIV,DEPT ELECT & ELECTR ENGN,UBE,YAMAGUCHI 755,JAPAN. NR 30 TC 32 Z9 32 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD NOV PY 1995 VL 2 IS 11 BP 4257 EP 4268 DI 10.1063/1.871051 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900028 ER PT J AU MOODY, JD BALDIS, HA MONTGOMERY, DS BERGER, RL ESTABROOK, K KRUER, WL LASINSKI, BF WILLIAMS, EA DIXIT, S LABAUNE, C AF MOODY, JD BALDIS, HA MONTGOMERY, DS BERGER, RL ESTABROOK, K KRUER, WL LASINSKI, BF WILLIAMS, EA DIXIT, S LABAUNE, C TI BEAM SMOOTHING EFFECTS ON THE STIMULATED BRILLOUIN-SCATTERING (SBS) INSTABILITY IN NOVA EXPLODING FOIL PLASMAS SO PHYSICS OF PLASMAS LA English DT Article ID LASER-PRODUCED PLASMA; SCALE-LENGTH PLASMAS; INHOMOGENEOUS-PLASMA; FILAMENTATION; RAMAN AB The effects of beam smoothing on the stimulated Brillouin and Raman backscattering instabilities (SBBS and SRBS) in a long scale length exploding foil plasma are experimentally investigated using the Nova laser. We observe strongly time-dependent and blueshifted SBS emission and broadband SRS emission in time-resolved spectral measurements of the backscattered light. The results of this paper focus on the SBS scattering, where we find that random phase plate spatial beam smoothing leads to a decrease in the total SBS reflectivity. Adding temporal smoothing to this spatial smoothing leads to an even greater decrease in the total reflectivity, as well as changes in the spectral nature of the backscattered light. Beam smoothing induced changes to the instabilities are limited to plasmas with a peak density below about 0.2n(cr); beam smoothing causes little change in the backscattered emission for higher densities. We describe the measurements and discuss models that may explain certain aspects of the results. (C) 1995 American Institute of Physics. C1 ECOLE POLYTECH,LULI LAB,PALAISEAU,FRANCE. RP MOODY, JD (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. OI Montgomery, David/0000-0002-2355-6242 NR 26 TC 19 Z9 22 U1 0 U2 4 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 NOV PY 1995 VL 2 IS 11 BP 4285 EP 4296 DI 10.1063/1.871053 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TC179 UT WOS:A1995TC17900030 ER PT J AU OLSON, P GLATZMAIER, GA AF OLSON, P GLATZMAIER, GA TI MAGNETOCONVECTION IN A ROTATING SPHERICAL-SHELL - STRUCTURE OF FLOW IN THE OUTER CORE SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS LA English DT Article ID STELLAR CONVECTIVE DYNAMOS; NUMERICAL SIMULATIONS; THERMAL-CONVECTION; GEODYNAMO; MODEL; FIELD; ZONE AB The structure of thermal convection in a three-dimensional rotating spherical shell of electrically conducting fluid with an imposed toroidal magnetic field depends on the Elsasser number, the ratio of Lorentz to Coriolis forces, and on the geometry of the shell. We present results of numerical calculations demonstrating that, for Elsasser numbers Lambda much less than 1, fully developed convection consists of narrow geostrophic columns outside the inner-core tangent cylinder and weaker three-dimensional flow inside the tangent cylinder. For Elsasser numbers Lambda greater than or equal to 1 the fully developed convection consists of magnetostrophic flow inside the tangent cylinder and-large-scale spiraling geostrophic flow outside. Interaction of the geostrophic flow with toroidal field induces patches of concentrated poloidal field, which combine to produce the external dipole. The magnetostrophic component of the flow induces very little poloidal field. The external dipole field is nearly axial for small Lambda A, whereas for large Lambda the external dipole is inclined and precesses about the rotation axis. C1 LOS ALAMOS NATL LAB, INST GEOPHYS & PLANETARY PHYS, LOS ALAMOS, NM 87515 USA. RP JOHNS HOPKINS UNIV, DEPT EARTH & PLANETARY SCI, OLIN HALL, 3400 N CHARLES ST, BALTIMORE, MD 21218 USA. NR 23 TC 39 Z9 40 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-9201 EI 1872-7395 J9 PHYS EARTH PLANET IN JI Phys. Earth Planet. Inter. PD NOV PY 1995 VL 92 IS 1-2 BP 109 EP 118 DI 10.1016/0031-9201(95)03065-5 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TE093 UT WOS:A1995TE09300012 ER PT J AU VASSILIEV, IR KOLBER, Z WYMAN, KD MAUZERALL, D SHUKLA, VK FALKOWSKI, PG AF VASSILIEV, IR KOLBER, Z WYMAN, KD MAUZERALL, D SHUKLA, VK FALKOWSKI, PG TI EFFECTS OF IRON LIMITATION ON PHOTOSYSTEM-II COMPOSITION AND LIGHT UTILIZATION IN DUNALIELLA-TERTIOLECTA SO PLANT PHYSIOLOGY LA English DT Article ID ELECTRON-TRANSPORT; GROWTH IRRADIANCE; REACTION CENTERS; USE EFFICIENCIES; CHLOROPHYLL; FLUORESCENCE; ENERGY; ALGAE; PHOTOSYNTHESIS; PROTEIN AB The effects of iron limitation on photosystem II (PSII) composition and photochemical energy conversion efficiency were studied in the unicellular chlorophyte alga Dunaliella tertiolecta. The quantum yield of photochemistry in PSII, inferred from changes in variable fluorescence normalized to the maximum fluorescence yield, was markedly lower in iron-limited cells and increased 3-fold within 20 h following the addition of iron. The decrease in the quantum yield of photochemistry was correlated with increased fluorescence emission from the antenna. In iron-limited cells, flash intensity saturation profiles of variable fluorescence closely followed a cumulative one-hit Poisson model, suggesting that PSII reaction centers are energetically isolated, whereas in iron-replete cells, the slope of the profile was steeper and the calculated probability of energy transfer between reaction centers increased to > 0.6. Immunoassays revealed that in iron-limited cells the reaction center proteins, D1, CP43, and CP47, were markedly reduced relative to the peripheral light-harvesting Chi-protein complex of PSII, whereas the alpha subunit of cytochrome b(559) was about 10-fold higher. Spectroscopic analysis established that the cytochrome b(559) peptide did not contain an associated functional heme. We conclude that the photochemical conversion of absorbed excitation energy in iron-limited cells is limited by the number of photochemical traps per unit antenna. C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, DIV OCEANOG & ATMOSPHER SCI, UPTON, NY 11973 USA. ROCKEFELLER UNIV, NEW YORK, NY 10021 USA. WASHINGTON UNIV, DEPT BIOL, ST LOUIS, MO 63130 USA. NR 39 TC 81 Z9 84 U1 0 U2 3 PU AMER SOC PLANT BIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 USA SN 0032-0889 J9 PLANT PHYSIOL JI Plant Physiol. PD NOV PY 1995 VL 109 IS 3 BP 963 EP 972 PG 10 WC Plant Sciences SC Plant Sciences GA TE793 UT WOS:A1995TE79300029 ER PT J AU Adams, JM Ageladarakis, P Alper, B Altmann, H Andrew, P AliArshad, S Bak, P Balet, B Baranov, Y Barker, P Barnsley, R Baronian, M Bartlett, DV Bell, AC Benali, G Bertolini, E Bhatnagar, V Bickley, AJ Bindslev, H Blackler, K Bond, D Bonicelli, T Borba, D Borras, K Brandon, M Breger, P Brelen, H Brennan, P Brewerton, WJ Brown, T Browne, ML Budd, T Bures, M Burt, A Burton, P Businaro, T Buttgereit, H Buzio, M CaldwellNicholas, C Campbell, DJ Campling, D Candy, J Card, P Celentano, G Challis, CD Chankin, AV Cherubini, A Chiron, D Christiansen, J Chuilon, P Ciric, D Claesen, R Clarke, HE Clement, S Coad, JP Coffey, I Cooper, S Cordey, JG Corrigan, G Cottrell, G Cox, M Crawley, P Cusack, R Dalla, S Davies, N Davies, SJ Davis, JJ deBenedetti, N deEsch, H deHaas, J Deksnis, E Deliyanakis, N Deng, C diMarchi, E Dines, A Dmitrenko, SL Dobbing, J Dolgetta, N Dorling, SE Doyle, PG Duquenoy, H Edwards, AM Edwards, AW Egedal, J Ehrenberg, J Ekedahl, A Ellis, J Erba, M Erents, SK Eriksson, LG Falter, H Farengo, R Fasoli, A Fechner, B Fischer, B Fishpool, G Froger, C Fullard, K Gadeberg, M Galbiati, L Gerstel, U Giannella, R Gibson, A Gill, RD Godden, D Gondhalekar, A Goodall, D Gormezano, C Goulding, R Gowers, C Graham, J Guenther, K Guo, H Haigh, A Haist, B Hancock, CJ Harbour, PJ Hawkes, NC Hawkes, NP Hemmerich, JJ Hender, T Hoekzema, J Horton, L How, J Howman, A Huart, M Huysmans, G Hwang, A Hughes, TP Hurd, F Ibbott, C Ingram, B Irving, M Jacquinot, J Jaeckel, H Jaeger, JF Jarvis, ON Jensen, F Johnson, M Jones, EM Jones, LPDF Jones, TTC Junger, JF Junique, F Kaye, A Keen, BE Keilhacker, M Kerner, W Kidd, NG King, QA Konig, R Kupschus, P Lamalle, P Lasser, R Last, JR LauroTaroni, L Lawson, K Lennholm, M Lingertat, J Loarte, A Lomas, PJ Loughlin, M Lovegrove, T Lowry, C Lyadina, E Maas, AC Macklin, B Maggi, CF Mantsinen, M Marchese, V Marcus, F Mart, J Martin, D Martin, T Matthews, G McBryan, H McCormick, G McCullen, PA Meigs, A Milani, F Mills, J Mohanti, R Monk, R Morgan, P Muir, D Murphy, G Nave, F Newbert, G Nguyen, F Nielsen, P Noll, P Obert, W OBrien, D Oord, E Ostrom, R Ottaviani, M Papastergiou, S Parail, VV Parsons, W Patel, B Paynter, A Peacock, A Peacock, N Pearce, RJM Pereverzev, G Perry, C Pick, MA Plancoulaine, J Pogutse, O Poffe, JP Porte, L Prentice, R Prior, P Puppin, S Radford, G Raimondi, T Reichle, R Righi, E Rimini, F Rolfe, A Rookes, A Ross, RT Rossi, A Rossi, L Sadler, G Saibene, G Salisbury, M Sanazzaro, G Santagiustina, A Sartori, F Sartori, R Saunders, R Savrukhin, P Scibile, M Schild, P Schmid, M Schunke, B Scott, SM Sharapov, S Sibley, A Simonini, R Sips, ACC Smeulders, P Smith, O Smith, P Smith, R Soldner, F Stamp, M Stangeby, P Start, DF Steed, CA Stork, D Stott, PE Stuart, A Stubberfield, P Summers, D Summers, H Suverkropp, W Svensson, L Svensson, P Tabasso, A Tabellini, M Tait, J Tanga, A Taroni, A Terella, C Thomas, PR Thomsen, K Tubbing, B vanderBeken, H vanBelle, P vanderLinden, R Vayakis, G Verrechia, M Vlases, G vonHellermann, M Wade, T Walton, R Ward, D Watkins, ML Watkins, N Watson, MJ Wesson, J Wheatley, M Wilson, D Winkel, T Woodward, C Young, D Young, ID Yu, Q Zannelli, F Zannelli, L Zastrow, KD Zornig, N Zullo, G Zwingmann, W AF Adams, JM Ageladarakis, P Alper, B Altmann, H Andrew, P AliArshad, S Bak, P Balet, B Baranov, Y Barker, P Barnsley, R Baronian, M Bartlett, DV Bell, AC Benali, G Bertolini, E Bhatnagar, V Bickley, AJ Bindslev, H Blackler, K Bond, D Bonicelli, T Borba, D Borras, K Brandon, M Breger, P Brelen, H Brennan, P Brewerton, WJ Brown, T Browne, ML Budd, T Bures, M Burt, A Burton, P Businaro, T Buttgereit, H Buzio, M CaldwellNicholas, C Campbell, DJ Campling, D Candy, J Card, P Celentano, G Challis, CD Chankin, AV Cherubini, A Chiron, D Christiansen, J Chuilon, P Ciric, D Claesen, R Clarke, HE Clement, S Coad, JP Coffey, I Cooper, S Cordey, JG Corrigan, G Cottrell, G Cox, M Crawley, P Cusack, R Dalla, S Davies, N Davies, SJ Davis, JJ deBenedetti, N deEsch, H deHaas, J Deksnis, E Deliyanakis, N Deng, C diMarchi, E Dines, A Dmitrenko, SL Dobbing, J Dolgetta, N Dorling, SE Doyle, PG Duquenoy, H Edwards, AM Edwards, AW Egedal, J Ehrenberg, J Ekedahl, A Ellis, J Erba, M Erents, SK Eriksson, LG Falter, H Farengo, R Fasoli, A Fechner, B Fischer, B Fishpool, G Froger, C Fullard, K Gadeberg, M Galbiati, L Gerstel, U Giannella, R Gibson, A Gill, RD Godden, D Gondhalekar, A Goodall, D Gormezano, C Goulding, R Gowers, C Graham, J Guenther, K Guo, H Haigh, A Haist, B Hancock, CJ Harbour, PJ Hawkes, NC Hawkes, NP Hemmerich, JJ Hender, T Hoekzema, J Horton, L How, J Howman, A Huart, M Huysmans, G Hwang, A Hughes, TP Hurd, F Ibbott, C Ingram, B Irving, M Jacquinot, J Jaeckel, H Jaeger, JF Jarvis, ON Jensen, F Johnson, M Jones, EM Jones, LPDF Jones, TTC Junger, JF Junique, F Kaye, A Keen, BE Keilhacker, M Kerner, W Kidd, NG King, QA Konig, R Kupschus, P Lamalle, P Lasser, R Last, JR LauroTaroni, L Lawson, K Lennholm, M Lingertat, J Loarte, A Lomas, PJ Loughlin, M Lovegrove, T Lowry, C Lyadina, E Maas, AC Macklin, B Maggi, CF Mantsinen, M Marchese, V Marcus, F Mart, J Martin, D Martin, T Matthews, G McBryan, H McCormick, G McCullen, PA Meigs, A Milani, F Mills, J Mohanti, R Monk, R Morgan, P Muir, D Murphy, G Nave, F Newbert, G Nguyen, F Nielsen, P Noll, P Obert, W OBrien, D Oord, E Ostrom, R Ottaviani, M Papastergiou, S Parail, VV Parsons, W Patel, B Paynter, A Peacock, A Peacock, N Pearce, RJM Pereverzev, G Perry, C Pick, MA Plancoulaine, J Pogutse, O Poffe, JP Porte, L Prentice, R Prior, P Puppin, S Radford, G Raimondi, T Reichle, R Righi, E Rimini, F Rolfe, A Rookes, A Ross, RT Rossi, A Rossi, L Sadler, G Saibene, G Salisbury, M Sanazzaro, G Santagiustina, A Sartori, F Sartori, R Saunders, R Savrukhin, P Scibile, M Schild, P Schmid, M Schunke, B Scott, SM Sharapov, S Sibley, A Simonini, R Sips, ACC Smeulders, P Smith, O Smith, P Smith, R Soldner, F Stamp, M Stangeby, P Start, DF Steed, CA Stork, D Stott, PE Stuart, A Stubberfield, P Summers, D Summers, H Suverkropp, W Svensson, L Svensson, P Tabasso, A Tabellini, M Tait, J Tanga, A Taroni, A Terella, C Thomas, PR Thomsen, K Tubbing, B vanderBeken, H vanBelle, P vanderLinden, R Vayakis, G Verrechia, M Vlases, G vonHellermann, M Wade, T Walton, R Ward, D Watkins, ML Watkins, N Watson, MJ Wesson, J Wheatley, M Wilson, D Winkel, T Woodward, C Young, D Young, ID Yu, Q Zannelli, F Zannelli, L Zastrow, KD Zornig, N Zullo, G Zwingmann, W TI JET results with the new pumped divertor and implications for ITER SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc AB This paper presents an overview of results of the 1994/95 experimental campaign on JET with the new pumped divertor and draws implications for ITER in the areas of detached and radiative divertor plasmas, the use of beryllium as a divertor target the material, the confinement properties of discharges with the same dimensionless parameters (except for the dimensionless Larmor radius) as ITER and the effect of varying the toroidal magnetic field ripple in the ITER relevant range. Discharges with high fusion performance at high current, in steady-state with ELMs and in the ELM-free hot-ion H-mode, are also reported. Limits to operations are discussed and projections to D-T performance are made. C1 AEA TECHNOL, DIDCOT, OXON, ENGLAND. UNIV LEICESTER, LEICESTER, LEICS, ENGLAND. CEA, CADARACHE, FRANCE. KFA JULICH, W-5170 JULICH, GERMANY. HELSINKI UNIV TECHNOL, SF-02150 ESPOO, FINLAND. INST PLASMA PHYS, HEFEI, PEOPLES R CHINA. UKAEA, CULHAM LAB, ABINGDON, OXON, ENGLAND. AF IOFFE PHYS TECH INST, ST PETERSBURG 194021, RUSSIA. UNIV OXFORD, INST MATH, OXFORD, ENGLAND. UNIV TEXAS, INST FUS STUDIES, AUSTIN, TX 78712 USA. ROYAL INST TECHNOL, S-10044 STOCKHOLM, SWEDEN. UNIV LONDON, UNIV LONDON IMPERIAL COLL SCI & TECHNOL, LONDON, ENGLAND. MAX PLANCK INST PLASMA PHYS, W-8046 GARCHING, GERMANY. KMS, ERM, PLASMA PHYS LAB, BRUSSELS, BELGIUM. FOM, INST PLASMAFYS, NIEUWEGEIN, NETHERLANDS. UNIV MILAN, DIPARTIMENTO FIS, MILAN, ITALY. UNIV LONDON, ROYAL HOLLOWAY COLL, LONDON, ENGLAND. EPFL, LAUSANNE, SWITZERLAND. UNIV STRATHCLYDE, GLASGOW, LANARK, SCOTLAND. UNIV TORONTO, INST AEROSP STUDIES, TORONTO, ON, CANADA. LNETI, SACAVEM, PORTUGAL. OAK RIDGE NATL LAB, OAK RIDGE, TN USA. UNIV QUEBEC, INRS ENERGIEET MAT, ST FOY, PQ G1V 2M3, CANADA. RP Adams, JM (reprint author), JET JOINT UNDERTAKING, ABINGDON OX14 3EA, OXON, ENGLAND. RI Nave, Maria/A-5581-2013 OI Nave, Maria/0000-0003-2078-6584 NR 26 TC 0 Z9 0 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A3 EP A17 PG 15 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300002 ER PT J AU Allen, SL Bozek, AS Brooks, NH Buchenauer, DA Burrell, KH Carlstrom, TN Cuthbertson, JW Deboo, JC Ellis, R Evans, JC Evans, TE Fenstermacher, ME Geer, RW Ghendrih, P Groebner, RJ Hill, DN Hillis, DL Hogan, JT Hollerbach, MA Holtrop, KL Hsieh, CL Hyatt, AW Jackson, GL James, RA Johnson, WR Jong, R Junge, R Klepper, CC Lasnier, CJ Laughon, GJ Leonard, AW Mahdavi, MA Maingi, R Menon, MM Mioduszewski, PK Moyer, RA Meyer, WH Nilson, DG Osborne, TH Overskei, DO Owen, LW Petrie, TW Phelps, DA Porter, GD Rensink, ME Sager, GT Schaffer, MJ Schaubel, KM Simonen, TC Smith, JP Staebler, GM Stambaugh, RD Stockdale, RE Thomas, DM Wade, MR Watkins, JD Weschenfelder, F West, WP Whyte, DG Wood, RD AF Allen, SL Bozek, AS Brooks, NH Buchenauer, DA Burrell, KH Carlstrom, TN Cuthbertson, JW Deboo, JC Ellis, R Evans, JC Evans, TE Fenstermacher, ME Geer, RW Ghendrih, P Groebner, RJ Hill, DN Hillis, DL Hogan, JT Hollerbach, MA Holtrop, KL Hsieh, CL Hyatt, AW Jackson, GL James, RA Johnson, WR Jong, R Junge, R Klepper, CC Lasnier, CJ Laughon, GJ Leonard, AW Mahdavi, MA Maingi, R Menon, MM Mioduszewski, PK Moyer, RA Meyer, WH Nilson, DG Osborne, TH Overskei, DO Owen, LW Petrie, TW Phelps, DA Porter, GD Rensink, ME Sager, GT Schaffer, MJ Schaubel, KM Simonen, TC Smith, JP Staebler, GM Stambaugh, RD Stockdale, RE Thomas, DM Wade, MR Watkins, JD Weschenfelder, F West, WP Whyte, DG Wood, RD TI Recent DIII-D divertor research SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc AB DIII-D currently operates with a single- or double-null open divertor and graphite walls. Active particle control with a divertor cryopump has demonstrated density control, efficient helium exhaust, and reduction of the inventory of particles in the wall. Gas puffing of D-2 and impurities has demonstrated reduction of the peak divertor heat flux by factors of 3-5 by radiation. A combination of active cryopumping and feedback-controlled D-2 gas puffing has produced similar divertor heat flux reduction with density control. Experiments with neon puffing have shown that the radiation is equally-divided between a localized zone near the X-point and a mantle around the plasma core. The density in these experiments has also been controlled with cryopumping. These experimental results combined with modeling were used to develop the new Radiative Divertor for DIII-D. This is a double-null slot divertor with four cryopumps to provide particle control and neutral shielding for high-triangularity advanced tokamak discharges. UEDGE and DEGAS simulations, benchmarked to experimental data, have been used to optimize the design. C1 GEN ATOM CO,SAN DIEGO,CA 92186. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. CEA,EURATOM ASSOC,CADARACHE,FRANCE. OAK RIDGE NATL LAB,OAK RIDGE,TN. KFA JULICH,W-5170 JULICH,GERMANY. OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37831. RP Allen, SL (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA, USA. NR 50 TC 37 Z9 37 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A191 EP A202 DI 10.1088/0741-3335/37/11A/012 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300013 ER PT J AU Johnson, DW Arunasalam, V Barnes, CW Batha, SH Bateman, G Beer, M Bell, MG Bell, R Bitter, M Bretz, NL Budny, R Bush, CE Cauffman, S Chang, CS Chang, Z Chang, CZ Darrow, DS Dendy, R Dorland, W Duong, HH Durst, R Efthimion, PC Ernst, D Evenson, H Fisch, NJ Fisher, R Fonck, RJ Fredrickson, E Fu, GY Fujita, T Furth, HP Gorelenkov, N Grek, B Grisham, LR Hammett, G Hawryluk, RJ Heidbrink, W Herrmann, HW Hill, KW Hosea, J Hsuan, H Hughes, M Janos, A Jassby, DL Jobes, FC Johnson, LC Kamperschroer, J Kesner, J Kotschenreuther, M Kugel, H LaMarche, PH LeBlanc, B Levinton, FM Machuzak, J Majeski, R Mansfield, DK Marmar, ES Mazzucato, E Mauel, M McChesney, J McGuire, KM McKee, G Meade, DM Medley, SS Mikkelsen, DR Mirnov, SV Mueller, D Nazikian, R Osakabe, M Owens, DK Park, H Park, W Parks, P Paul, SF Petrov, M Phillips, CK Phillips, M Qualls, AL Ramsey, A Redi, MH Rewoldt, G Roberts, D Rogers, J Roquemore, AL Ruskov, E Sabbagh, SA Sasao, M Schilling, G Schivell, J Schmidt, GL Scott, SD Semenov, I Sesnic, S Skinner, CH Spong, D Stratton, BC Strachan, JD Stodiek, W Synakowski, E Takahashi, H Tang, W Taylor, G Terry, J vonHalle, HA vonGoeler, S White, R Wilson, JR Wong, KL Wurden, GA Young, KM Zarnstorff, MC Zweben, SJ AF Johnson, DW Arunasalam, V Barnes, CW Batha, SH Bateman, G Beer, M Bell, MG Bell, R Bitter, M Bretz, NL Budny, R Bush, CE Cauffman, S Chang, CS Chang, Z Chang, CZ Darrow, DS Dendy, R Dorland, W Duong, HH Durst, R Efthimion, PC Ernst, D Evenson, H Fisch, NJ Fisher, R Fonck, RJ Fredrickson, E Fu, GY Fujita, T Furth, HP Gorelenkov, N Grek, B Grisham, LR Hammett, G Hawryluk, RJ Heidbrink, W Herrmann, HW Hill, KW Hosea, J Hsuan, H Hughes, M Janos, A Jassby, DL Jobes, FC Johnson, LC Kamperschroer, J Kesner, J Kotschenreuther, M Kugel, H LaMarche, PH LeBlanc, B Levinton, FM Machuzak, J Majeski, R Mansfield, DK Marmar, ES Mazzucato, E Mauel, M McChesney, J McGuire, KM McKee, G Meade, DM Medley, SS Mikkelsen, DR Mirnov, SV Mueller, D Nazikian, R Osakabe, M Owens, DK Park, H Park, W Parks, P Paul, SF Petrov, M Phillips, CK Phillips, M Qualls, AL Ramsey, A Redi, MH Rewoldt, G Roberts, D Rogers, J Roquemore, AL Ruskov, E Sabbagh, SA Sasao, M Schilling, G Schivell, J Schmidt, GL Scott, SD Semenov, I Sesnic, S Skinner, CH Spong, D Stratton, BC Strachan, JD Stodiek, W Synakowski, E Takahashi, H Tang, W Taylor, G Terry, J vonHalle, HA vonGoeler, S White, R Wilson, JR Wong, KL Wurden, GA Young, KM Zarnstorff, MC Zweben, SJ TI Recent D-T results on TFTR SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc ID ALFVEN EIGENMODES; EMISSION AB Routine tritium operation in TFTR has permitted investigations of alpha particle physics in parameter ranges resembling those of a reactor core. ICRF wave physics in a DT plasma and the influence of isotopic mass on supershot confinement have also been studied. Continued progress has been made in optimizing fusion power production in TFTR, using extended machine capability and Li wall conditioning. Performance is currently limited by MHD stability. A new reversed magnetic shear regime is being investigated with reduced core transport and a higher predicted stability limit. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM USA. FUS PHYS & TECHNOL, TORRANCE, CA USA. OAK RIDGE NATL LAB, OAK RIDGE, TN USA. NYU, COURANT INST, NEW YORK, NY USA. CULHAM LAB, ABINGDON OX14 3DB, OXON, ENGLAND. UNIV TEXAS, INST FUS STUDIES, SAN ANTONIO, TX USA. GEN ATOM CO, SAN DIEGO, CA USA. UNIV WISCONSIN, MADISON, WI USA. MIT, CAMBRIDGE, MA 02139 USA. JAERI, NAKA FUS RES ESTAB, NAKA, IBARAKI, JAPAN. TRINITI, MOSCOW, RUSSIA. UNIV CALIF IRVINE, IRVINE, CA 92717 USA. GRUMMAN CORP, PRINCETON, NJ USA. COLUMBIA UNIV, NEW YORK, NY USA. NATL INST FUS SCI, NAGOYA, AICHI, JAPAN. AF IOFFE PHYS TECH INST, ST PETERSBURG 194021, RUSSIA. RP PRINCETON UNIV, PLASMA PHYS LAB, POB 451, PRINCETON, NJ 08543 USA. RI Sabbagh, Steven/C-7142-2011; Hammett, Gregory/D-1365-2011; Ernst, Darin/A-1487-2010; Spong, Donald/C-6887-2012; Dendy, Richard/A-4533-2009; Dorland, William/B-4403-2009; White, Roscoe/D-1773-2013; Cheng, Chio/K-1005-2014; Wurden, Glen/A-1921-2017 OI Mauel, Michael/0000-0003-2490-7478; Hammett, Gregory/0000-0003-1495-6647; Ernst, Darin/0000-0002-9577-2809; Spong, Donald/0000-0003-2370-1873; Dorland, William/0000-0003-2915-724X; White, Roscoe/0000-0002-4239-2685; Wurden, Glen/0000-0003-2991-1484 NR 46 TC 22 Z9 22 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 EI 1361-6587 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A69 EP A85 DI 10.1088/0741-3335/37/11A/005 PG 17 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300006 ER PT J AU Koch, R VanWassenhove, G VanEester, D Euringer, H Finken, KH Hillis, DL Messiaen, AM AF Koch, R VanWassenhove, G VanEester, D Euringer, H Finken, KH Hillis, DL Messiaen, AM TI Interaction of ICRF waves with fast particles on TEXTOR SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc ID ION-CYCLOTRON RANGE; CONFINEMENT AB The experiments involving the interaction of radio-frequency heating with fast particles injected by neutral beams on TEXTOR are reviewed. The focus point of the present study is the comparison between experiments and theory. Theory involves the modelling of RF diffusion in velocity space, absorption of radio-frequency waves by non-maxwellian populations, computation of drift trajectories to take trapping and first-orbit losses into account, A more specific theoretical development used in this context is the reconstruction of charge exchange spectroscopy spectra Three types of experiments are examined. The synergetic increase of beam current drive by radio-frequency power, the large neutron production in third harmonic heating of D beam ions and the control of central fast helium concentration by radio-frequency induced diffusion. C1 FORSCHUNGSZENTRUM KFA,INST PLASMAPHYS,D-52425 JULICH,GERMANY. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP Koch, R (reprint author), ERM,KMS,PLASMA PHYS LAB,B-1040 BRUSSELS,BELGIUM. NR 21 TC 21 Z9 21 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A291 EP A302 DI 10.1088/0741-3335/37/11A/020 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300021 ER PT J AU Loarer, T Chatelier, M Grosman, A Gauthier, E Grisolia, C Hutter, T Pegourie, B Tsitrone, E Hogan, JT Klepper, CC Mioduszewski, PK Owen, L Uckan, T AF Loarer, T Chatelier, M Grosman, A Gauthier, E Grisolia, C Hutter, T Pegourie, B Tsitrone, E Hogan, JT Klepper, CC Mioduszewski, PK Owen, L Uckan, T TI Particle exhaust experiments with pump limiter, ergodic divertor and vented limiter in Tore Supra SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc AB In Tore Supra, plasma particle exhaust has been studied by means of modular pump limiters, with either throats (ion collection) or vented structures (neutral collection), and with an ergodic divertor. Detailed study of active plasma density control has been performed in these three configurations for ohmic conditions. In Tore Supra, emphasis has been put on achieving highly radiating edge conditions, essentially in the ergodic divertor configuration. Indeed, this device has already demonstrated its capability of creating favourable plasma edge conditions without modification of the central plasma parameters. It is shown experimentally that for ohmic shot, when the plasma detaches the parallel particle flux in the scrape off layer is strongly reduced. Consequently, the resulting neutral flux from the neutralizer plates of the throat limiter drops as well as the particle exhaust. Preliminary experiments have been achieved with a modular vented limiter and exhibit significant hydrogen exhaust even for ohmic detached plasmas and such a vented structure is presently planned to be installed on the ergodic divertor. Finally, particle balance with active pumping has to include wall particle inventory. This term is shown to be dominant for hydrogen experiments, in contrast to helium shots where the wall contribution is negligible. C1 OAK RIDGE NATL LAB,DIV FUS ENERGY,OAK RIDGE,TN 37830. RP Loarer, T (reprint author), CE CADARACHE,EURATOM ASSOC,CEA FUS CONTROLEE,F-13108 ST PAUL DURANCE,FRANCE. RI GAUTHIER, Eric/E-1076-2011 NR 32 TC 17 Z9 17 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A203 EP A214 DI 10.1088/0741-3335/37/11A/013 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300014 ER PT J AU Zohm, H Maraschek, M Pautasso, G Schittenhelm, M Sesnic, S Sokoll, M Suttrop, W Alexander, M BessenrodtWeberpals, M Boozer, A deBlank, HJ Fuchs, JC Gernhardt, J Gruber, O Kass, T Kaufmann, M Lang, PT Lackner, K Meister, H Mertens, V Neu, R Wolfl, F AF Zohm, H Maraschek, M Pautasso, G Schittenhelm, M Sesnic, S Sokoll, M Suttrop, W Alexander, M BessenrodtWeberpals, M Boozer, A deBlank, HJ Fuchs, JC Gernhardt, J Gruber, O Kass, T Kaufmann, M Lang, PT Lackner, K Meister, H Mertens, V Neu, R Wolfl, F TI MHD stability and disruption physics in ASDEX upgrade SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article; Proceedings Paper CT 22nd European-Physical-Society Conference on Controlled Fusion and Plasma Physics CY JUL 03-07, 1995 CL BOURNEMOUTH, ENGLAND SP European Phys Soc AB The MHD activity giving rise to the beta- and the density limit in ASDEX Upgrade is analyzed. A detailed description of the MHD phenomena occurring prior to and during disruptions is given. The MHD characteristics of the different ELM types occurring in ASDEX Upgrade are described. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. COLUMBIA UNIV,DEPT APPL PHYS,NEW YORK,NY 10027. RP Zohm, H (reprint author), EURATOM,MPI PLASMAPHYS,D-85748 GARCHING,GERMANY. RI Lang, Peter/H-2507-2013; Neu, Rudolf /B-4438-2010 OI Lang, Peter/0000-0003-1586-8518; Neu, Rudolf /0000-0002-6062-1955 NR 20 TC 43 Z9 43 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD NOV PY 1995 VL 37 SU 11A BP A313 EP A324 DI 10.1088/0741-3335/37/11A/022 PG 12 WC Physics, Fluids & Plasmas SC Physics GA TM953 UT WOS:A1995TM95300023 ER PT J AU ANDERS, A ANDERS, S AF ANDERS, A ANDERS, S TI THE WORKING PRINCIPLE OF THE HOLLOW-ANODE PLASMA SOURCE SO PLASMA SOURCES SCIENCE & TECHNOLOGY LA English DT Article ID DISCHARGE AB The hollow-anode discharge is a special form of glow discharge. It is shown that a drastically reduced anode area is responsible for a positive anode voltage drop of 30-40 V and an increased anode sheath thickness. This leads to ignition of a relatively dense plasma in front of the anode hole. Langmuir probe measurements inside a specially designed hollow anode plasma source give an electron density and temperature of n(e) = 10(9)-10(11) cm(-3) and T-e = 1-3 eV, respectively (nitrogen, current 100 mA, flow rate 5-50 sec min(-1)). Driven by a pressure gradient, the 'anode' plasma is blown through the anode hole and forms a bright plasma jet streaming with supersonic velocity (Mach number 1.2). The plasma stream can be used,for instance, in plasma-assisted deposition of thin films. RP ANDERS, A (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Anders, Andre/B-8580-2009; Raoux, Simone/G-3920-2016 OI Anders, Andre/0000-0002-5313-6505; NR 16 TC 47 Z9 47 U1 1 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0963-0252 J9 PLASMA SOURCES SCI T JI Plasma Sources Sci. Technol. PD NOV PY 1995 VL 4 IS 4 BP 571 EP 575 DI 10.1088/0963-0252/4/4/008 PG 5 WC Physics, Fluids & Plasmas SC Physics GA TJ178 UT WOS:A1995TJ17800008 ER PT J AU MENG, CF LIN, JS AF MENG, CF LIN, JS TI DETERMINATION OF THE WIDTH OF THE TRANSITION LAYER BETWEEN THE CRYSTALLINE AND AMORPHOUS ZONES IN NYLON-1010 BY SAXS SO POLYMER INTERNATIONAL LA English DT Article DE NYLON 1010; SMALL ANGLE X-RAY SCATTERING; TRANSITION LAYER WIDTH ID ANGLE X-RAY; SCATTERING; POLYMERS; SYSTEM AB The width of the transition layer between the crystalline and amorphous zones in nylon 1010 was determined by SAXS with point collimation and long-slit collimation, respectively. The width of the transition layer, E, was found to be 1.7 nm. The results show that the width of the transition layer is independent of crystallinity. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,CTR SMALL ANGLE SCATTERING RES,OAK RIDGE,TN 37831. RP MENG, CF (reprint author), JILIN UNIV,INST MAT SCI,CHANGCHUN 130023,PEOPLES R CHINA. NR 13 TC 0 Z9 0 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0959-8103 J9 POLYM INT JI Polym. Int. PD NOV PY 1995 VL 38 IS 3 BP 245 EP 248 DI 10.1002/pi.1995.210380305 PG 4 WC Polymer Science SC Polymer Science GA TC925 UT WOS:A1995TC92500005 ER PT J AU DEVENS, DA DENN, MM AF DEVENS, DA DENN, MM TI SOLID-PHASE RHEOLOGY OF AN ANISOTROPIC POLYMER (VECTRA-A) SO POLYMERS FOR ADVANCED TECHNOLOGIES LA English DT Article DE ANISOTROPIC; LIQUID CRYSTAL; PLASTICITY; RHEOLOGY; SOLID-PHASE; THERMOTROPIC; VECTRA ID GLASSY-POLYMERS; PLASTIC-DEFORMATION; LOW-TEMPERATURE; STRAIN; YIELD; CREEP; POLYETHYLENE; RELAXATION; BEHAVIOR; RECOVERY AB The solid-phase theology of a thermotropic polyester which is liquid crystalline in the melt (Vectra A) was studied for one-dimensional finite-amplitude deformations, including step-strain and recovery, step-stress and recovery, and step-strain followed by small-amplitude oscillations. The theology is complex, and cannot be described by existing models. Below a critical strain, which is history-dependent, Vectra A deforms as a linear viscoelastic solid. Above the critical strain the deformation is both viscoplastic and viscoelastic. There appears to be a maximum recoverable strain of about 0.03, beyond which all deformation is nonrecoverable. A large number of relaxation modes is required to describe the stress, and one time scale is inadequate to describe the time-dependence of yielding and plastic flow. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 37 TC 1 Z9 1 U1 1 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1042-7147 J9 POLYM ADVAN TECHNOL JI Polym. Adv. Technol. PD NOV PY 1995 VL 6 IS 11 BP 693 EP 702 DI 10.1002/pat.1995.220061103 PG 10 WC Polymer Science SC Polymer Science GA TH799 UT WOS:A1995TH79900003 ER PT J AU Tuttle, JR Contreras, MA Gabor, AM Ramanathan, KR Tennant, AL Albin, DS Keane, J Noufi, R AF Tuttle, JR Contreras, MA Gabor, AM Ramanathan, KR Tennant, AL Albin, DS Keane, J Noufi, R TI Perspective on high efficiency Cu(In,Ga)Se-2-based thin-film solar cells fabricated by simple, scalable processes SO PROGRESS IN PHOTOVOLTAICS LA English DT Article ID CUINSE2; GROWTH; PHASE AB We have fabricated high-efficiency Cu(In, Ga)Se-2(CIGS)-based photovoltaic (PV) devices by four different processes, Each process may be characterized as either sequential or concurrent deposition of the metals with or without an activity of selenium. A world-record total-area efficiency of 17.1% has been achieved by the concurrent delivery of the metals in rite presence of selenium. Gallium has been introduced into rite device in such a manner as to produce homogeneous, normal profiling and double-profiling graded bandgap structures. This has resulted in an open-circuit voltage (V-oc) parameter of 680 mV and a fill factor of over 78%, A growth model has been developed allowing for simple translation of these processes to a manufacturing environment for the large-scale production of modules. RP Tuttle, JR (reprint author), NATL RENEWABLE ENERGY LAB, 1617 COLE BLVD, GOLDEN, CO 80401 USA. NR 27 TC 21 Z9 21 U1 0 U2 5 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD NOV-DEC PY 1995 VL 3 IS 6 BP 383 EP 391 PG 9 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA TR502 UT WOS:A1995TR50200002 ER PT J AU Basore, PA AF Basore, PA TI Event report - Sunrayce 95 SO PROGRESS IN PHOTOVOLTAICS LA English DT Editorial Material AB Thirty-six university teams from Canada, Mexico and the United States raced their solar-powered cars from Indiana to Colorado during June 1995. The event, called Sunrayce 95, is designed to provide a stimulating educational opportunity for students of science and engineering, while educating the public about the exciting prospect of environmentally clean photovoltaic energy. The race was the fastest and closest ever for a collegiate solar-car event, with the winner decided by only 19 minutes and one team averaging over 80 kph for 1 day of the race. RP Basore, PA (reprint author), SANDIA NATL LABS,PHOTOVOLTA SYST COMPONENTS DEPT,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 2 TC 2 Z9 2 U1 0 U2 0 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD NOV-DEC PY 1995 VL 3 IS 6 BP 425 EP 427 PG 3 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA TR502 UT WOS:A1995TR50200006 ER PT J AU LIAW, SH KUO, IC EISENBERG, D AF LIAW, SH KUO, IC EISENBERG, D TI DISCOVERY OF THE AMMONIUM SUBSTRATE SITE ON GLUTAMINE-SYNTHETASE, A 3RD CATION-BINDING SITE SO PROTEIN SCIENCE LA English DT Article DE GLUTAMINE SYNTHETASE; NH4+; TL+ ID ACTIVATED PROTEIN-C; SALMONELLA-TYPHIMURIUM; FROG-SKIN; TRANSMITTER; RESOLUTION; MECHANISM; CRYSTALS; EXAMPLE; CHANNEL; PROBE AB Glutamine synthetase (GS) catalyzes the ATP-dependent condensation of ammonia and glutamate to yield glutamine, ADP, and inorganic phosphate in the presence of divalent cations. Bacterial GS is an enzyme of 12 identical subunits, arranged in two rings of 6, with the active site between each pair of subunits in a ring. In earlier work, we have reported the locations within the funnel-shaped active site of the substrates glutamate and ATP and of the two divalent cations, but the site for ammonia (or ammonium) has remained elusive. Here we report the discovery by X-ray crystallography of a binding site on GS for monovalent cations, Tl+ and Cs+, which is probably the binding site for the substrate ammonium ion. Fourier difference maps show the following. (1) Tl+ and Cs+ bind at essentially the same site, with ligands being Glu 212, Tyr 179, hsp 50', Ser 53' of the adjacent subunit, and the substrate glutamate. From its position adjacent to the substrate glutamate and the cofactor ADP, we propose that this monovalent cation site is the substrate ammonium ion binding site. This proposal is supported by enzyme kinetics. Our kinetic measurements show that Tl+, Cs+, and NH4+ are competitive inhibitors to NH2OH in the gamma-glutamyl transfer reaction. (2) GS is a trimetallic enzyme containing two divalent cation sites (n(1), n(2)) and one monovalent cation site per subunit. These three closely spaced ions are all at the active site: the distance between n(1) and n(2) is 6 Angstrom, between n(2) and Tl+ is 7 Angstrom, and between n(1) and Tl+ is 7 Angstrom. Glu 212 and the substrate glutamate are bridging ligands for the n(1) ion and Tl+. (3) The presence of a monovalent cation in this site may enhance the structural stability of GS, because of its effect of balancing the negative charges of the substrate glutamate and its ligands and because of strengthening the ''side-to-side'' intersubunit interaction through the cation-protein bonding. (4) The presence of the cofactor ADP increases the Tl+ binding to GS because ADP binding induces movement of Asp 50' toward this monovalent cation site, essentially forming the site. This observation supports a two-step mechanism with ordered substrate binding: ATP first binds to GS, then Glu binds and attacks ATP to form gamma-glutamyl phosphate and ADP, which complete the ammonium binding site. The third substrate, an ammonium ion, then binds to GS, and then loses a proton to form the more active species ammonia, which attacks the gamma-glutamyl phosphate to yield Gln. (5) Because the products (Glu or Gln) of the reactions catalyzed by GS are determined by the molecule (water or ammonium) attacking the intermediate gamma-glutamyl phosphate, this negatively charged ammonium binding pocket has been designed naturally for high affinity of ammonium to GS, permitting glutamine synthesis to proceed in aqueous solution. C1 NATL TAIWAN UNIV,SCH MED,INST MOLEC MED,TAIPEI 10764,TAIWAN. UNIV CALIF LOS ANGELES,DOE,INST MOLEC BIOL,STRUCT BIOL & MOLEC MED LAB,LOS ANGELES,CA 90095. UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90095. FU NIGMS NIH HHS [GM-31299] NR 37 TC 58 Z9 59 U1 0 U2 5 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 NOV PY 1995 VL 4 IS 11 BP 2358 EP 2365 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TE287 UT WOS:A1995TE28700014 PM 8563633 ER PT J AU SAMUDRALA, R PEDERSEN, JT ZHOU, HB LUO, R FIDELIS, K MOULT, J AF SAMUDRALA, R PEDERSEN, JT ZHOU, HB LUO, R FIDELIS, K MOULT, J TI CONFRONTING THE PROBLEM OF INTERCONNECTED STRUCTURAL-CHANGES IN THE COMPARATIVE MODELING OF PROTEINS SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article DE CORRELATED STRUCTURAL CHANGES; EOSINOPHIL-DERIVED NEUROTOXIN; CELLULAR RETINOIC ACID-BINDING PROTEIN; HISTIDINE-CONTAINING PHOSPHOCARRIER PROTEIN ID ALIGNMENT; SEQUENCES; ALGORITHM; BACKBONE AB Comparative models of three proteins have been built using a variety of computational methods, heavily supplemented by visual inspection, We consider the accuracy obtained to be worse than expected, A careful analysis of the models shows that a major reason for the poor results is the interconnectedness of the structural differences between the target proteins and the template structures they were modeled from, Side chain conformations are often determined by details of the structure remote in the sequence, and can be influenced by relatively small main chain changes, Almost all of the regions of substantial main chain conformational change interact with at least one other such region, so that they often cannot be modeled independently, Visual inspection is sometimes effective in correcting errors in sequence alignment and in spotting when an alternative template structure is more appropriate, We expect some improvements in the near future through the development of structure-based sequence alignment tools, side chain interconnectedness rotamer choice algorithms, and a better understanding of the context sensitivity of conformational features. (C) 1995 Wiley-Liss, Inc. C1 UNIV MARYLAND,MARYLAND BIOTECHNOL INST,CTR ADV RES BIOTECHNOL,ROCKVILLE,MD 20850. UNIV MARYLAND,PROGRAM MOLEC & CELL BIOL,COLLEGE PK,MD 20742. UNIV MARYLAND,DEPT CHEM & BIOCHEM,COLLEGE PK,MD 20742. LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. RI Luo, Ray/I-6928-2012 OI Luo, Ray/0000-0002-6346-8271 FU NIGMS NIH HHS [GM41034] NR 26 TC 15 Z9 15 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 0887-3585 J9 PROTEINS JI Proteins PD NOV PY 1995 VL 23 IS 3 BP 327 EP 336 DI 10.1002/prot.340230307 PG 10 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TH809 UT WOS:A1995TH80900006 PM 8710826 ER PT J AU MOULT, J PEDERSEN, JT JUDSON, R FIDELIS, K AF MOULT, J PEDERSEN, JT JUDSON, R FIDELIS, K TI A LARGE-SCALE EXPERIMENT TO ASSESS PROTEIN-STRUCTURE PREDICTION METHODS SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Editorial Material C1 SANDIA NATL LABS,LIVERMORE,CA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RP MOULT, J (reprint author), UNIV MARYLAND,MARYLAND BIOTECHNOL INST,CTR ADV RES BIOTECHNOL,9600 GUDELSKY DR,ROCKVILLE,MD 20850, USA. NR 0 TC 174 Z9 183 U1 3 U2 7 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 NOV PY 1995 VL 23 IS 3 BP R2 EP R4 DI 10.1002/prot.340230303 PG 3 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA TH809 UT WOS:A1995TH80900002 PM 8710822 ER PT J AU MOORE, DS VODINH, T VELTHORST, NH SCHRADER, B AF MOORE, DS VODINH, T VELTHORST, NH SCHRADER, B TI NOMENCLATURE, SYMBOLS, UNITS AND THEIR USAGE IN SPECTROCHEMICAL ANALYSIS .15. LASER-BASED MOLECULAR-SPECTROSCOPY FOR CHEMICAL-ANALYSIS - LASER FUNDAMENTALS SO PURE AND APPLIED CHEMISTRY LA English DT Article AB This report is 15th in a series on Spectrochemical Methods of Analysis issued by IUPAC Commission V.4. It is concerned with the fundamental properties of lasers as used in analytical molecular spectroscopy in the optical wavelength region. The present report has five main sections: Introduction to lasers, Types of lasers. Laser propagation, Laser dynamics, and Exploitation of laser properties. C1 OAK RIDGE NATL LAB,ADV MONITORING DEV GRP,OAK RIDGE,TN 37831. VRIJE UNIV AMSTERDAM,1081 HV AMSTERDAM,NETHERLANDS. UNIV ESSEN GESAMTHSCH,INST THEORET & PHYS CHEM,D-45117 ESSEN,GERMANY. RP MOORE, DS (reprint author), LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,POB 1663,LOS ALAMOS,NM 87544, USA. NR 0 TC 0 Z9 0 U1 0 U2 1 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 NOV PY 1995 VL 67 IS 11 BP 1913 EP 1928 DI 10.1351/pac199567111913 PG 16 WC Chemistry, Multidisciplinary SC Chemistry GA TJ450 UT WOS:A1995TJ45000019 ER PT J AU OTTOLENGHI, A MERZAGORA, M TALLONE, L DURANTE, M PARETZKE, HG WILSON, WE AF OTTOLENGHI, A MERZAGORA, M TALLONE, L DURANTE, M PARETZKE, HG WILSON, WE TI THE QUALITY OF DNA DOUBLE-STRAND BREAKS - A MONTE-CARLO SIMULATION OF THE END-STRUCTURE OF STRAND BREAKS PRODUCED BY PROTONS AND ALPHA-PARTICLES SO RADIATION AND ENVIRONMENTAL BIOPHYSICS LA English DT Article ID MAMMALIAN-CELLS; CHROMOSOMAL-ABERRATIONS; RADIATION QUALITIES; EUKARYOTIC CELLS; SINGLE-STRAND; REPAIR; INACTIVATION; IRRADIATION; INDUCTION; LESIONS AB The quality of DNA damage induced by protons and alpha-particles of various linear energy transfer (LET) was studied. The aim was to single out specific lesions in the DNA molecule that might lead to biological endpoints such as inactivation. A DNA model coupled with a track structure code (MOCA-15) were used to simulate the lesions induced on the two helixes. Four categories of DNA breaks were considered: single-strand breaks (ssb), blunt-ended double-strand breaks (dsb, with no or few overlapping bases), sticky-ended double-strand breaks (with cohesive free ends of many bases), and deletions (complex lesions which involve at least two dsb within a small number of base pairs). Calculations were carried out assuming various sets of parameters characterizing the production of these different DNA breaks. No large variations in the yields of ssb and blunt- or sticky-ended dsb were found in the LET range between 10 and 200 keV/mu m. On the other hand, the yield of deletions increases up to about 100 keV/mu m and seems to reach a plateau at higher LET values. In the LET interval from 30 to 60 keV/mu m, protons proved to be more efficient than alpha-particles in inducing deletions. The induction of these complex lesions is thus dependent not simply on LET but also on the characteristics of the track structure. Comparison with RBE values for cell killing shows that this special class of dsb might play an important role in radiation-induced cell inactivation. C1 IST NAZL FIS NUCL, I-20133 MILAN, ITALY. UNIV NAPLES FEDERICO II, DIPARTIMENTO SCI FIS, I-80125 NAPLES, ITALY. GSF MUNICH, INST STRAHLENSCHUTZ, D-85758 NEUHERBERG, GERMANY. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP OTTOLENGHI, A (reprint author), UNIV MILAN, DIPARTIMENTO FIS, VIA CELORIA 16, I-20133 MILAN, ITALY. RI Durante, Marco/K-1315-2014; OI Durante, Marco/0000-0002-4615-553X NR 35 TC 62 Z9 62 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 NOV PY 1995 VL 34 IS 4 BP 239 EP 244 DI 10.1007/BF01209749 PG 6 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 TJ478 UT WOS:A1995TJ47800007 PM 8749062 ER PT J AU FRY, RJM AF FRY, RJM TI 100 YEARS OF X-RAYS SO RADIATION RESEARCH LA English DT Editorial Material RP FRY, RJM (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD NOV PY 1995 VL 144 IS 2 BP 123 EP 123 PG 1 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA TD528 UT WOS:A1995TD52800001 PM 7480637 ER PT J AU JONAH, CD AF JONAH, CD TI A SHORT HISTORY OF THE RADIATION-CHEMISTRY OF WATER SO RADIATION RESEARCH LA English DT Article ID ELECTRON AB The first hundred years of radiation studies have greatly clarified the chemical processes that are induced by radiation. While the fundamental ionization processes are similar in all systems, properties of the medium such as phase, polarity and composition can greatly affect the chemistry. In all systems, one needs to understand what chemical species are formed, what the internal energies are, how they are dispersed spatially, and what reactions can occur. In this review, the progress that has been made in understanding the chemistry that occurs after a radiolysis event for liquid water is outlined as an example of how progress has been made in radiation chemistry. (C) 1995 by Radiation Research Society RP JONAH, CD (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 37 TC 29 Z9 29 U1 1 U2 14 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 NOV PY 1995 VL 144 IS 2 BP 141 EP 147 DI 10.2307/3579253 PG 7 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA TD528 UT WOS:A1995TD52800004 PM 7480640 ER PT J AU SANDERS, CL LUNDGREN, DL AF SANDERS, CL LUNDGREN, DL TI PULMONARY CARCINOGENESIS IN THE F344 AND WISTAR RAT AFTER INHALATION OF PLUTONIUM DIOXIDE SO RADIATION RESEARCH LA English DT Article ID INHALED (PUO2)-PU-239; LIFE-SPAN; SURVIVAL; LUNG; AUTORADIOGRAPHY; AGGREGATION; NEOPLASMS; AEROSOL; HISTORY AB Pulmonary carcinogenesis was compared in female F344 and Wistar rats after inhalation of high-fired (PuO2)-Pu-239. Plutonium particle aggregation, as determined by quantitative light and scanning electron microscopic autoradiography, was greater for the F344 strain than for the Wistar strain. The median survival times were similar in control and low-dose (0.8-1.0 Gy) groups of both strains, but were significantly decreased in the high-dose (34-37 Gy) groups of both strains. Squamous metaplasia was not found in control or low-dose groups of either strain, but was found in 62-65% of high-dose groups of both strains. Adenomatous metaplasia was considerably higher in control and low-dose groups of F344 rats than in Wistar rats. ii total of 87 lung tumors were found in 140 exposed F344 rats and 46 lung tumors in 176 exposed Wistar rats. The incidence of lung tumors in F344 rats was 1.7% in controls, 20% in the low-dose group and 82% in the high-dose group, The incidence of lung tumors in Wistar rats was 0.1% in controls, nil in the low-dose group and 68% in the high-dose group. About half of all lung tumors in both strains were considered to be the primary cause of death. The median survival times of rats of both strains in the high-dose groups that died with lung tumors were greater compared with rats in these groups that died without lung tumors. In contrast, these differences did not occur among rats in the low-dose groups, The absolute risk was 1900 lung tumors per 10(4) Rat-Gy for F344 rats receiving low doses and nil for Wistar rats receiving low doses, but about 210 lung tumors per 10(4) Rat-Gy for high-dose groups of both strains. The adenomatous tumor phenotype predominated in the F344 strain, while the squamous tumor phenotype predominated in the Wistar strain. Risk of squamous tumors was similar for both strains. Overall, the F344 strain appears to be more ''sensitive'' than the Wistar strain to formation of lung tumors at low to moderate doses from inhaled (PuO2)-Pu-239 due mostly to an increased incidence of adenomatous phenotype tumors. (C) 1995 by Radiation Research Society C1 INHALAT TOXICOL RES INST, ALBUQUERQUE, NM 87185 USA. WASHINGTON STATE UNIV TRI CITIES, CTR HLTH RES & EDUC, RICHLAND, WA 99352 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 31 TC 17 Z9 18 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD NOV PY 1995 VL 144 IS 2 BP 206 EP 214 DI 10.2307/3579260 PG 9 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA TD528 UT WOS:A1995TD52800011 PM 7480647 ER PT J AU QIAN, S DUNHAM, ME FREEMAN, MJ AF QIAN, S DUNHAM, ME FREEMAN, MJ TI TRANSIONOSPHERIC SIGNAL RECOGNITION BY JOINT TIME-FREQUENCY REPRESENTATION SO RADIO SCIENCE LA English DT Article AB A challenging problem in signal processing is the detection of impulsive signals which are dispersed by the ionosphere and received by RF satellite sensors. One example of this type of signal is the so-called transionospheric pulse pair (TIPP), thought to be associated with lightning discharges. Since these dispersed events occur sporadically and typically persist for less than 100 mu s, the first objective is to detect or trigger on the signal of interest, thereby reducing the amount of data relayed back to Earth. Difficulties in detecting transionospheric impulses arise from the dispersion of the original signal, which lowers the signal-to-noise ratio (SNR), and the need for continuous, real-time observation. The energy content of TIPPs has been measured from 25 MHz to more than 100 MHz, requiring sampling rates of at least 150 MHz to capture the events. Although these transionospheric signals are easily recognized in the joint time-frequency domain, the computation involved in time-frequency transformations prohibits application to a real-time detector with this sampling rate. Using a joint time-frequency representation allows us to derive a robust time convolution template to fit transionospheric signals. This template can be used to design matched chirp filter banks, which are optimum with respect to SNR, for detection of transionospheric signals. We believe that a realistic matched filter bank could have a sparse spacing while maintaining good detection ability. This type of detector is also amenable to real-time analog hardware implementation in conventional finite impulse response (FIR) filter structures. Our work shows that transionospheric signals encountered in real data are effectively detected by matched filter banks. While a specific application is treated here, the methods described are general, and applicable to many problems in signal detection and recognition which treat nonlinearly dispersed signals. C1 LOS ALAMOS NATL LAB,DIV NON PROLIFERAT & INT SECUR,LOS ALAMOS,NM 87545. RP QIAN, S (reprint author), NATL INSTRUMENTS,DSP GRP,6504 BRIDGE POINT PKWY,AUSTIN,TX 78759, USA. NR 14 TC 9 Z9 9 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0048-6604 J9 RADIO SCI JI Radio Sci. PD NOV-DEC PY 1995 VL 30 IS 6 BP 1817 EP 1829 DI 10.1029/95RS01527 PG 13 WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications GA TH032 UT WOS:A1995TH03200013 ER PT J AU SCHILLER, EP MALOUF, DB DANIELSON, LC AF SCHILLER, EP MALOUF, DB DANIELSON, LC TI RESEARCH UTILIZATION - A FEDERAL PERSPECTIVE SO REMEDIAL AND SPECIAL EDUCATION LA English DT Article RP SCHILLER, EP (reprint author), US DOE,OFF SPECIAL EDUC PROGRAMS,DIV INNOVAT & DEV,330 C ST SW,ROOM 3523,WASHINGTON,DC 20202, USA. NR 20 TC 2 Z9 3 U1 0 U2 0 PU PRO-ED INC PI AUSTIN PA 8700 SHOAL CREEK BLVD, AUSTIN, TX 78757-6897 SN 0741-9325 J9 REM SPEC EDUC JI Remedial Spec. Educ. PD NOV PY 1995 VL 16 IS 6 BP 372 EP 375 PG 4 WC Education, Special SC Education & Educational Research GA TA590 UT WOS:A1995TA59000008 ER PT J AU AHMAD, I PHILLIPS, WR AF AHMAD, I PHILLIPS, WR TI GAMMA-RAYS FROM FISSION FRAGMENTS SO REPORTS ON PROGRESS IN PHYSICS LA English DT Review ID NEUTRON-RICH NUCLEI; HEAVY-ION REACTIONS; ANGULAR-DISTRIBUTIONS; OCTUPOLE DEFORMATION; ISOL FACILITY; MASS; ISOTOPES; CF-252; DECAY; IDENTIFICATION AB High-resolution measurements on gamma rays from fission fragments have given a wealth of information on the structure of neutron-rich nuclei and on the mechanism of the fission process. Experiments to study prompt gamma rays which deexcite secondary fragments have been greatly facilitated by the introduction of large arrays of Compton suppressed gamma-ray detectors. These have been used recently to give important data on new neutron-rich nuclei with up to ten more neutrons than the nearest stable isotope. High-resolution experiments have also been performed to study gamma rays which follow the beta(-) decays of the ground states of secondary fragments, and extensive data now exist on decay properties of nuclei with up to twelve more neutrons than the nearest stable isotope. This paper reviews the scope of measurements which can be made on fission gamma rays and the techniques used in the experiments. Tt also discusses some results recently obtained on nuclear structure of fragments and on beta(-) decays, and reviews information on fragment spins and other data relevant to fission dynamics. C1 UNIV MANCHESTER,DEPT PHYS & ASTRON,MANCHESTER M13 9PL,LANCS,ENGLAND. RP AHMAD, I (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. NR 108 TC 80 Z9 80 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0034-4885 J9 REP PROG PHYS JI Rep. Prog. Phys. PD NOV PY 1995 VL 58 IS 11 BP 1415 EP 1463 DI 10.1088/0034-4885/58/11/002 PG 49 WC Physics, Multidisciplinary SC Physics GA TJ824 UT WOS:A1995TJ82400002 ER PT J AU MACLACHLAN, A AF MACLACHLAN, A TI TRUSTING OUTSIDERS TO DO YOUR RESEARCH - HOW DOES INDUSTRY LEARN TO DO IT SO RESEARCH-TECHNOLOGY MANAGEMENT LA English DT Article AB Success in the global marketplace requires restructuring and rethinking of all aspects of business management, including in the case of technology-based companies, how technology itself is acquired and improved. Because new technology development is often so risky in either cost or time to the marketplace, and is available from so many external sources, it is vital that companies learn holy to tap into these external sources as effectively as they have managed their own internal R&D organizations for so long. These external sources include partnerships with other companies, universities and research institutes, and various government laboratories and development facilities around the world. American companies would seem to have a unique opportunity at this time in history, as our great university and government laboratory systems are being driven bq similar global pressures to team up with us in new and more effective ways. RP MACLACHLAN, A (reprint author), US DOE,WASHINGTON,DC, USA. NR 0 TC 9 Z9 9 U1 3 U2 5 PU INDUSTRIAL RESEARCH INST INC PI WASHINGTON PA 1550 M ST., NW, WASHINGTON, DC 20005 SN 0895-6308 J9 RES TECHNOL MANAGE JI Res.-Technol. Manage. PD NOV-DEC PY 1995 VL 38 IS 6 BP 48 EP 53 PG 6 WC Business; Engineering, Industrial; Management SC Business & Economics; Engineering GA TB334 UT WOS:A1995TB33400012 ER PT J AU WINEBRAKE, JJ FARRELL, AE BERNSTEIN, MA AF WINEBRAKE, JJ FARRELL, AE BERNSTEIN, MA TI THE CLEAN-AIR ACTS SULFUR-DIOXIDE EMISSIONS MARKET - ESTIMATING THE COSTS OF REGULATORY AND LEGISLATIVE INTERVENTION SO RESOURCE AND ENERGY ECONOMICS LA English DT Article DE ENVIRONMENTAL POLICY; REGULATORY POLICY; ENERGY POLICY; EMISSIONS TRADING SYSTEMS; ACID RAIN CONTROL ID DISCHARGE PERMITS; STRATEGIES; POLLUTION AB This paper explores the economic impacts of regulatory and legislative intervention in the Clean Air Act Amendment's sulfur dioxide (SO2) allowance trading market. This intervention is of two types: (1) direct intervention through laws or regulatory orders that constrain compliance options of market participants, and (2) indirect intervention, reflected in utility decision making, and caused by a lack of regulatory policies that clarify the treatment of allowance market transactions. The paper uses a dynamic, linear programming model to empirically estimate the economic impacts of this intervention. An example of direct intervention is explored by modeling actual legislative and/or regulatory proposals in New York and Wisconsin; indirect intervention is explored through the development of a cost-uncertainty tradeoff curve. The results indicate that both types of intervention are costly and these costs must be weighed against any expected social benefits. C1 US DOE,PHILADELPHIA,PA 19103. UNIV PENN,PHILADELPHIA,PA 19104. NATL RENEWABLE ENERGY LAB,WASHINGTON,DC 20024. RI Winebrake, James/D-2478-2010 NR 53 TC 21 Z9 21 U1 2 U2 4 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 NOV PY 1995 VL 17 IS 3 BP 239 EP 260 DI 10.1016/0928-7655(95)00006-J PG 22 WC Economics; Energy & Fuels; Environmental Sciences; Environmental Studies SC Business & Economics; Energy & Fuels; Environmental Sciences & Ecology GA TD106 UT WOS:A1995TD10600002 ER PT J AU YANG, M WHITTEN, WB RAMSEY, JM AF YANG, M WHITTEN, WB RAMSEY, JM TI QUADRUPOLE TRAP CONTROL-CIRCUIT FOR LASER-DESORPTION MASS-SPECTROMETRY OF LEVITATED MICROPARTICLES SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ELECTRODYNAMIC BALANCE; WATER AB An electronic control system for laser desorption mass spectrometry of a levitated single microparticle in a quadrupole trap is described. This circuit provides appropriate low-frequency ac and de voltages for microparticle levitation and switches them to ground prior to laser desorption, enabling the trap to store and mass analyze the laser-desorbed ions. (C) 1995 American Institute of Physics. RP YANG, M (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. NR 21 TC 6 Z9 6 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 NOV PY 1995 VL 66 IS 11 BP 5222 EP 5225 DI 10.1063/1.1146088 PG 4 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TE623 UT WOS:A1995TE62300015 ER PT J AU DAI, Q VOLLMER, R CARPICK, RW OGLETREE, DF SALMERON, M AF DAI, Q VOLLMER, R CARPICK, RW OGLETREE, DF SALMERON, M TI VARIABLE-TEMPERATURE ULTRAHIGH-VACUUM ATOMIC-FORCE MICROSCOPE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID SCANNING TUNNELING MICROSCOPE; SCALE FRICTION; TIP; SURFACE AB A new atomic force microscope (AFM) that operates in ultrahigh vacuum (UHV) is described. The sample is held fixed with spring clamps while the AMF cantilever and deflection sensor are scanned above it. Thus, the sample is easily coupled to a liquid nitrogen cooled thermal reservoir which allows AFM operation from approximate to 100 K to room temperature. AFM operation above room temperature is also possible. The microscope head is capable of coarse x-y positioning over millimeter distances so that AFM images can be taken virtually anywhere upon a macroscopic sample. The optical beam deflection scheme is used for detection, allowing simultaneous normal and lateral force measurements. The sample can be transferred from the AFM stage to a low energy electron diffraction/Auger electron spectrometer stage for surface analysis. Atomic lattice resolution AFM images taken in UHV are presented at 110, 296, and 430 K. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RI Ogletree, D Frank/D-9833-2016 OI Ogletree, D Frank/0000-0002-8159-0182 NR 17 TC 38 Z9 38 U1 0 U2 9 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 NOV PY 1995 VL 66 IS 11 BP 5266 EP 5271 DI 10.1063/1.1146097 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TE623 UT WOS:A1995TE62300024 ER PT J AU ERSKINE, DJ AF ERSKINE, DJ TI INCREASE IN VELOCIMETER DEPTH OF FOCUS THROUGH ASTIGMATISM SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Note ID INTERFEROMETER AB Frequently, velocimeter targets are illuminated by a laser beam passing through a hole in a mirror. This mirror is responsible for diverting returning light from a target lens to a velocity interferometer system for any reflector. This mirror is often a significant distance from the target lens. Consequently, at certain target focus positions the returning light is strongly vignetted by the hole, causing a loss of signal. This note finds that the loss of signal can be prevented and that the useful depth can be greatly increased by attaching a cylindrical lens to the target lens. (C) 1995 American Institute of Physics. RP ERSKINE, DJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 5 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD NOV PY 1995 VL 66 IS 11 BP 5373 EP 5374 DI 10.1063/1.1146117 PG 2 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TE623 UT WOS:A1995TE62300047 ER PT J AU KAUFFMAN, JF LIU, CS AF KAUFFMAN, JF LIU, CS TI SIMPLE SHUTTER CIRCUIT FOR PROTECTING MICROCHANNEL PLATE PHOTOMULTIPLIERS FROM EXCESS LIGHT EXPOSURE - RESPONSE SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Letter RP KAUFFMAN, JF (reprint author), LOS ALAMOS NATL LAB,DIV NONPROLIFERAT & INT SECUR,NIS-2,MAIL STOP D436,LOS ALAMOS,NM 87545, USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD NOV PY 1995 VL 66 IS 11 BP 5387 EP 5387 DI 10.1063/1.1146060 PG 1 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TE623 UT WOS:A1995TE62300055 ER PT J AU THORSEN, C BARON, M AF THORSEN, C BARON, M TI SIMPLE SHUTTER CIRCUIT FOR PROTECTING MICROCHANNEL PLATE PHOTOMULTIPLIERS FROM EXCESS LIGHT EXPOSURE - COMMENT SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Letter RP THORSEN, C (reprint author), LOS ALAMOS NATL LAB,DIV NONPROLIFERAT & INT SECUR,NIS-2,MAIL STOP D436,LOS ALAMOS,NM 87545, USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD NOV PY 1995 VL 66 IS 11 BP 5387 EP 5387 DI 10.1063/1.1146059 PG 1 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA TE623 UT WOS:A1995TE62300054 ER PT J AU DINI, JW AF DINI, JW TI ELECTRODEPOSITION - SOME PRESENT ACTIVITIES AND FUTURE-PROSPECTS SO SAMPE JOURNAL LA English DT Article ID NICKEL ALLOY ELECTRODEPOSITS; NITROGEN-IMPLANTED METALS; ION-IMPLANTATION; ZINC-NICKEL; WEAR BEHAVIOR; COATINGS; CADMIUM; LAYERS; FILMS; VIEW RP LAWRENCE LIVERMORE NATL LAB, POB 5508, LIVERMORE, CA USA. NR 66 TC 1 Z9 1 U1 0 U2 1 PU SAMPE PUBLISHERS PI COVINA PA 1161 PARKVIEW DRIVE, COVINA, CA 91722 USA SN 0091-1062 J9 SAMPE J JI Sampe J. PD NOV-DEC PY 1995 VL 31 IS 6 BP 19 EP 23 PG 5 WC Engineering, Multidisciplinary; Materials Science, Multidisciplinary SC Engineering; Materials Science GA TB456 UT WOS:A1995TB45600007 ER PT J AU HOU, PY SMIALEK, JL AF HOU, PY SMIALEK, JL TI EFFECT OF SULFUR REMOVAL BY H-2-ANNEALING ON THE OXIDATION BEHAVIOR OF A NI-25CR ALLOY SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article ID METAL INTERFACE; SEGREGATION; CHROMIUM; ADHERENCE; ADHESION C1 NASA,LEWIS RES CTR,CLEVELAND,OH 44135. RP HOU, PY (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. NR 20 TC 11 Z9 12 U1 1 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD NOV 1 PY 1995 VL 33 IS 9 BP 1409 EP 1416 DI 10.1016/0956-716X(95)00385-9 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA RY299 UT WOS:A1995RY29900007 ER PT J AU OSTAPENKO, S JASTRZEBSKI, L SOPORI, B AF OSTAPENKO, S JASTRZEBSKI, L SOPORI, B TI CHANGE OF MINORITY-CARRIER DIFFUSION LENGTH IN POLYCRYSTALLINE SILICON BY ULTRASOUND TREATMENT SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY LA English DT Article ID HEAVY-METAL CONTAMINATION; PHOTOELECTRIC PROPERTIES; SURFACE PHOTOVOLTAGE; SOLID-SOLUTIONS; IRON; SEMICONDUCTORS; LUMINESCENCE; PAIRS AB We present a new approach for defect engineering by ultrasound treatment (UST) in solar-grade polycrystalline silicon wafers, leading to significant enhancement of minority carrier diffusion length (L) in wafer regions with short L. The maximum value of the UST effect is a 2.7 times increase of the diffusion length in regions of the sample with L = 10 to 25 mu m. Using the surface photovoltage (SPV) method for non-contact mapping of the diffusion length, we have found both a positive and negative variation of L after UST in different wafer regions. The UST effect depends upon temperature, showing an activation energy of about 0.17 eV. A relaxation study of the UST effect shows two different behaviours: (i) stable result versus post-UST holding time, and (ii) partial or complete recovery of the diffusion length. Process (ii) is linked to the ultrasound-enhanced dissociation of FeB pairs followed by pairing kinetics. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP OSTAPENKO, S (reprint author), UNIV S FLORIDA,CTR MICROELECTR RES,TAMPA,FL 33620, USA. NR 24 TC 6 Z9 6 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0268-1242 J9 SEMICOND SCI TECH JI Semicond. Sci. Technol. PD NOV PY 1995 VL 10 IS 11 BP 1494 EP 1500 DI 10.1088/0268-1242/10/11/011 PG 7 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Condensed Matter SC Engineering; Materials Science; Physics GA TE244 UT WOS:A1995TE24400011 ER PT J AU HENDRICKSON, B AF HENDRICKSON, B TI THE MOLECULE PROBLEM - EXPLOITING STRUCTURE IN GLOBAL OPTIMIZATION SO SIAM JOURNAL ON OPTIMIZATION LA English DT Article DE GLOBAL OPTIMIZATION; GRAPH RIGIDITY; MOLECULAR CONFORMATION ID RIGIDITY; GRAPHS; ALGORITHM AB The molecule problem is that of determining the relative locations of a set of objects in Euclidean space relying only upon a sparse set of pairwise distance measurements. This NP-hard problem has applications in the determination of molecular conformation. The molecule problem can be naturally expressed as a continuous, global optimization problem, but it also has a rich combinatorial structure. This paper investigates how that structure can be exploited to simplify the optimization problem. In particular, we present a novel divide-and-conquer algorithm in which a large global optimization problem is replaced by a sequence of smaller ones. Since the cost of the optimization can grow exponentially with problem size, this approach holds the promise of a substantial improvement in performance. Our algorithmic development relies upon some recently published results in graph theory. We describe an implementation of this algorithm and report some results of its performance on a sample molecule. RP SANDIA NATL LABS, DEPT APPL & NUMER MATH, POB 5800, ALBUQUERQUE, NM 87185 USA. NR 33 TC 94 Z9 97 U1 0 U2 3 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA SN 1052-6234 EI 1095-7189 J9 SIAM J OPTIMIZ JI SIAM J. Optim. PD NOV PY 1995 VL 5 IS 4 BP 835 EP 857 DI 10.1137/0805040 PG 23 WC Mathematics, Applied SC Mathematics GA TE682 UT WOS:A1995TE68200006 ER PT J AU SCHULZE, DG SUTTON, SR BAJT, S AF SCHULZE, DG SUTTON, SR BAJT, S TI DETERMINING MANGANESE OXIDATION-STATE IN SOILS USING X-RAY-ABSORPTION NEAR-EDGE STRUCTURE (XANES) SPECTROSCOPY SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID FINE-STRUCTURE; SPECTRA; INFORMATION; SAMPLES; OXIDES; FE AB The redox chemistry of soil Mn is important in Mn uptake by plants, the movement of trace elements absorbed on or occluded in Mn-oxides, and the etiology of some soil-home plant fungal diseases. The objectives of this study were to develop calibration curves for determining Mn oxidation states in moist soil samples using micro-x-ray absorption near-edge structure spectroscopy and to test the method on selected soils. Oxidation-state standards were prepared by mixing dry powders of MnSO4 . H2O (Mn2+) and a synthetic Na-birnessite, Na4Mn14O27. 9H(2)O (Mn4+) to obtain various Mn2+ mole fractions, f(Mn2+), where f(Mn2+) = Mn2+/(Mn2+ + Mn4+). Corundum (alpha-Al2O3) was used as a diluent to prepare mixtures containing 50, 1000, and 100 000 mg Mn kg(-1). Quantitative analysis of Mn oxidation state is possible using either the energy-of the pre-edge peak at 6540 eV or a ratio based on the intensity of the Mn2+ white line peak at 6552.6 eY divided by the intensity of the Mn4+ white line peak at 6560.9 eV. The white line intensity ratio is more sensitive, with an estimated loffer detection limit of 20 mg Mn kg(-1) using a 300 by 300 mu m spot, and predicts f(Mn2+) with an accuracy of +/-0.1 mole fraction (95% confidence interval) through most of its range. The f(Mn2+) for four air-dried Indiana surface soils ranged from 0.26 to 0.44 +/- 0.1. Saturation and reduction for 5 d resulted in complete reduction of Mn in the soil matrix. C1 UNIV CHICAGO, DEPT GEOPHYS SCI, CHICAGO, IL 60637 USA. UNIV CHICAGO, CONSORTIUM ADV RADIAT SOURCES, CHICAGO, IL 60637 USA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP SCHULZE, DG (reprint author), PURDUE UNIV, DEPT AGRON, 1150 LILLY HALL, W LAFAYETTE, IN 47907 USA. RI Bajt, Sasa/G-2228-2010 NR 39 TC 60 Z9 62 U1 0 U2 22 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA SN 0361-5995 EI 1435-0661 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD NOV-DEC PY 1995 VL 59 IS 6 BP 1540 EP 1548 PG 9 WC Soil Science SC Agriculture GA TF740 UT WOS:A1995TF74000005 ER PT J AU DAVENPORT, DW WILCOX, BP ALLEN, BL AF DAVENPORT, DW WILCOX, BP ALLEN, BL TI MICROMORPHOLOGY OF PEDOGENICALLY DERIVED FRACTURE FILLS IN BANDELIER-TUFF, NEW-MEXICO SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID YUCCA MOUNTAIN; NEVADA AB Fractures in the Bandelier Tuff are potential paths for water movement and transport of contaminants from waste disposal sites and other contaminated areas at Los Alamos National Laboratory, Los Alamos, NM. Contaminants transported in this way could ultimately be found in Los Alamos drinking water or in the Rio Grande, which hows through heavily populated areas in both the USA and Mexico. We conducted this study to determine (i) the morphology and origin of soil-like material in the fractures, and (ii) the likelihood of significant water movement through the fractures. We examined thin sections of fracture fills, soils, and tuffs to obtain fabric and mineralogical data, and collected field data on soil horizons, color, texture, structure, clay films, and root abundance. Fracture fills consist of clay, CaCO3, or combinations of the two with minor inclusions of tuff and sand grains. Clay consists of thick, highly oriented argillans aligned parallel to fracture walls, and of discrete books in fracture interiors. Carbonate consists of massive microcrystalline calcite, which completely fills some fractures, and laminae or infillings between clay laminae or boob in clay-dominated fractures. The carbonate was precipitated after clay deposition, suggesting a change to a more arid climate. Weaker development of argillans and carbonate features in the soils suggests that the fractures may be derived from older soils that have been stripped by erosion. The presence of live roots throughout the fracture fills indicates the presence of water, but the smectitic clay and massive carbonate make it unlikely that significant water movement is now taking place through the fractures. The potential creation of new macropores by a variety of processes, however, including seismic activity and biologic disturbance, could allow rapid water movement and contaminant transport. C1 TEXAS TECH UNIV,DEPT PLANT & SOIL SCI,LUBBOCK,TX 79409. RP DAVENPORT, DW (reprint author), LOS ALAMOS NATL LAB,ENVIRONM SCI GRP EES-15,MAIL STOP J495,LOS ALAMOS,NM 87545, USA. NR 44 TC 6 Z9 6 U1 0 U2 0 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 SN 0361-5995 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD NOV-DEC PY 1995 VL 59 IS 6 BP 1672 EP 1683 PG 12 WC Soil Science SC Agriculture GA TF740 UT WOS:A1995TF74000024 ER PT J AU KAFESAKI, M SIGALAS, MM ECONOMOU, EN AF KAFESAKI, M SIGALAS, MM ECONOMOU, EN TI ELASTIC-WAVE BAND-GAPS IN 3-D PERIODIC POLYMER MATRIX COMPOSITES SO SOLID STATE COMMUNICATIONS LA English DT Article DE ACOUSTIC PROPERTIES; ELASTICITY ID LOCALIZATION; PROPAGATION AB We present band structure results for elastic waves in periodic composite materials consisting of scatterers (spheres, cubes, or rods) embedded in a homogeneous polymer matrix. The material of the scatterers is a high density material (such as Steel, Ni, Pb, Cu, etc.). In all cases, we find wide full band gaps in fee, bcc and sc structures for a wide range of filling ratios. We show that the existence of these wide gaps can been analyzed and predicted by using the single scattering results. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP KAFESAKI, M (reprint author), RES CTR CRETE,FORTH,POB 1527,GR-71110 IRAKLION,GREECE. RI Economou, Eleftherios /E-6374-2010; Kafesaki, Maria/E-6843-2012 OI Kafesaki, Maria/0000-0002-9524-2576 NR 29 TC 107 Z9 109 U1 6 U2 26 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD NOV PY 1995 VL 96 IS 5 BP 285 EP 289 DI 10.1016/0038-1098(95)00444-0 PG 5 WC Physics, Condensed Matter SC Physics GA RU493 UT WOS:A1995RU49300006 ER PT J AU ZOLLNER, S HERZINGER, CM WOOLLAM, JA IYER, SS POWELL, AP EBERL, K AF ZOLLNER, S HERZINGER, CM WOOLLAM, JA IYER, SS POWELL, AP EBERL, K TI PIEZO-OPTICAL RESPONSE OF SI1-YCY ALLOYS GROWN PSEUDOMORPHICALLY ON SI(001) SO SOLID STATE COMMUNICATIONS LA English DT Article DE SEMICONDUCTORS; EPITAXY; DIELECTRIC RESPONSE; ELECTRONIC BAND STRUCTURE; LIGHT ABSORPTION AND REFLECTION ID SILICON AB We have measured the dielectric functions of three Si1-yCy alloy layers (y less than or equal to 1.4%) grown pseudomorphically on Si (001) substrates using molecular beam epitaxy at low temperatures. From the numerical derivatives of the measured spectra, we determine the critical point energies E(0)' and E(1) as a function of y (y less than or equal to 1.4%) using a comparison with analytical line shapes and analyze these energies in terms of the expected shifts and splittings due to negative pressure, shear stress, and alloying. Our data agree well with the calculated shifts for E(1), but the E(0)' energies are lower than expected. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. UNIV NEBRASKA,CTR MICROELECTR & OPT MAT RES,LINCOLN,NE 68588. UNIV NEBRASKA,DEPT ELECT ENGN,LINCOLN,NE 68588. IBM CORP,DIV RES,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. RP ZOLLNER, S (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Zollner, Stefan/B-4858-2012 OI Zollner, Stefan/0000-0001-7752-7941 NR 17 TC 9 Z9 9 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD NOV PY 1995 VL 96 IS 5 BP 305 EP 308 DI 10.1016/0038-1098(95)00441-6 PG 4 WC Physics, Condensed Matter SC Physics GA RU493 UT WOS:A1995RU49300009 ER PT J AU APBLETT, C GONZALES, MF BARBOUR, JC GONZALESPETERSEN, LM KOVACS, M KUHR, B AF APBLETT, C GONZALES, MF BARBOUR, JC GONZALESPETERSEN, LM KOVACS, M KUHR, B TI SILICON-NITRIDE GROWTH IN A HIGH-DENSITY PLASMA SYSTEM SO SOLID STATE TECHNOLOGY LA English DT Article ID HYDROGEN CONTENT AB Silicon nitride is used in many different semiconductor applications, including passivation layers, masking layers, and as dielectrics for specialty gates. plasma-enhanced chemical vapor deposition (PECVD) of silicon nitride can lower processing temperatures and stress in the film, hut can result in higher hydrogen content and lower density than films deposited by thermal decomposition. Silicon nitride films deposited from high-density plasmas (HDP) have lower hydrogen content, lower stress, and higher density than conventional PECVD films. This article will focus on deposition of silicon nitride from an electron cyclotron resonance plasma. C1 LAM RES INC,FREMONT,CA. RP APBLETT, C (reprint author), SANDIA NATL LABS,1515 EUBANK SE,POB 5800,M-S 1084,DEPT 1323,ALBUQUERQUE,NM 87111, USA. NR 13 TC 2 Z9 3 U1 0 U2 0 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 NOV PY 1995 VL 38 IS 11 BP 73 EP & PG 0 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA TD997 UT WOS:A1995TD99700013 ER PT J AU Herant, M AF Herant, M TI The supernova explosion mechanism and dimensionality of hydrodynamics SO SPACE SCIENCE REVIEWS LA English DT Review DE supernovae; hydrodynamics ID INSTABILITY AB It is argued that multidimensional hydrodynamics is the key to a robust supern RP LOS ALAMOS NATL LAB, DIV THEORY, MS K710, LOS ALAMOS, NM 87545 USA. NR 14 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0038-6308 EI 1572-9672 J9 SPACE SCI REV JI Space Sci. Rev. PD NOV PY 1995 VL 74 IS 3-4 BP 335 EP 341 DI 10.1007/BF00751419 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TQ954 UT WOS:A1995TQ95400012 ER PT J AU Lin, T Gold, LS Freedman, D AF Lin, T Gold, LS Freedman, D TI Carcinogenicity tests and interspecies concordance SO STATISTICAL SCIENCE LA English DT Article DE cancer tests; inter-species extrapolation; carcinogenic potency; bias ID NATIONAL-TOXICOLOGY-PROGRAM; POTENCY DATABASE; ANIMAL BIOASSAYS; RISK ASSESSMENT; LONG-TERM; CHRONOLOGICAL SUPPLEMENT; RODENT BIOASSAY; RATS; MICE; CHEMICALS AB According to current policy, chemicals are evaluated for possible cancer risk to humans at low dose by testing in bioassays, where high doses of the chemical are given to rodents. Thus, risk is extrapolated from high dose in rodents to low dose in humans. The accuracy of these extrapolations is generally unverifiable, since data on humans are limited. However, it is feasible to examine the accuracy of extrapolations from mice to rats. If mice and rats are similar with respect to carcinogenesis, this provides some evidence in favor of interspecies extrapolations; conversely, if mice and rats are different, this casts doubt on the validity of extrapolations from mice to humans. One measure of interspecies agreement is concordance, the percentage of chemicals that are classified the same way as to carcinogenicity in mice and rats. Observed concordance in National Cancer Institute/National Toxicology Program bioassays is around 75%, which may seem on the low side-because mice and rats are closely related species tested under the same experimental conditions. Theoretically, observed concordance could underestimate true concordance, due to measurement error in the bioassays. Thus, bias in concordance is of policy interest. Expanding on previous work by Piegorsch et al., we show that the bias in observed concordance can be either positive or negative: an observed concordance of 75% can arise if the true concordance is anything between 20 and 100%. In particular, observed concordance can seriously overestimate true concordance. A variety of models more or less fit the data, with quite different implications for bias. Therefore, given our present state of knowledge, it seems unlikely that true concordance can be determined from bioassay data. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CARCINOGEN POTENCY PROJECT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT STAT,BERKELEY,CA 94720. RP Lin, T (reprint author), UNIV CALIF LOS ANGELES,DEPT MATH,LOS ANGELES,CA 90066, USA. NR 72 TC 5 Z9 5 U1 2 U2 3 PU INST MATHEMATICAL STATISTICS PI HAYWARD PA IMS BUSINESS OFFICE-SUITE 6 3401 INVESTMENT BLVD, HAYWARD, CA 94545 SN 0883-4237 J9 STAT SCI JI Stat. Sci. PD NOV PY 1995 VL 10 IS 4 BP 337 EP 353 PG 17 WC Statistics & Probability SC Mathematics GA VL594 UT WOS:A1995VL59400002 ER PT J AU Jankowski, AF Hayes, JP AF Jankowski, AF Hayes, JP TI Reactive sputter deposition of yttria-stabilized zirconia SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 22nd International Conference on Metallurgical Coatings and Thin Films (ICMCTF 1995) CY APR 24-29, 1995 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE yttria-stabilized zirconia; reactive deposition; magnetron sputtering; electrolyte layers; solid oxide fuel cells ID THIN-FILMS; FUEL-CELLS; ELECTROLYTES; MOLYBDENUM; OXIDES AB Yttria-stabilized zirconia (YSZ) films were synthesized using reactive d.c, magnetron sputter deposition. A homogeneous alloy of Zr-Y was synthesized and processed into a planar magnetron target which is reactively sputtered with an argon-oxygen gas mixture to form Zr-Y-O films. The sputtering conditions of gas flow, gas pressure, deposition rate and substrate temperature were determined in order to produce the cubic phase of zirconia as verified by X-ray diffraction. A higher rate of deposition is achievable when the sputtering mode of the Zr-Y alloy target is metallic as opposed to oxide. The Zr-Y composition of the planar magnetron target was designed for optimum oxygen-ion conductivity in the YSZ films, al elevated temperature for potential use in solid-oxide fuel cells. The oxygen concentration of the as-deposited films was measured using Auger electron spectroscopy and found to vary principally as a function of the sputter deposition rate. A fuel cell was produced with the reactive deposition process using Pt electrodes from which the growth morphology of the YSZ layer was characterized using scanning electron microscopy. RP Jankowski, AF (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 21 TC 26 Z9 26 U1 1 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD NOV PY 1995 VL 76 IS 1-3 BP 126 EP 131 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TM179 UT WOS:A1995TM17900021 ER PT J AU Anders, S Anders, A Rubin, M Wang, Z Raoux, S Kong, F Brown, IG AF Anders, S Anders, A Rubin, M Wang, Z Raoux, S Kong, F Brown, IG TI Formation of metal oxides by cathodic arc deposition SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 22nd International Conference on Metallurgical Coatings and Thin Films (ICMCTF 1995) CY APR 24-29, 1995 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE cathodic arc deposition; oxide formation ID FILMS; ENERGY AB Cathodic are deposition is an established and industrially applied technique for the formation of nitrides (e.g. TiN); it can also be used for metal oxide thin film formation. A cathodic are plasma source with the desired cathode material is operated in an oxygen atmosphere of appropriate pressure, and metal oxides of various stoichiometric composition can be formed on different substrates. We report here on a series of experiments on metal oxide formation by cathodic are deposition for different applications. Black copper oxide has been deposited on accelerator components to increase the radiative heat transfer between the parts. Various metal oxides such as tungsten oxide, niobium oxide, nickel oxide and vanadium oxide have been deposited on ITO glass to form electrochromic films for window applications. Optical waveguide structures can be formed by refractive index variation using oxide multilayers. We have synthesized multilayers of Al2O3-Y2O3-Al2O3-Si as possible basic structures for passive optoelectronic integrated circuits, and Al2-xErxO3 thin films with a variable Er concentration which is a potential component layer for the production of active optoelectronic integrated devices such as amplifiers or lasers at a wavelength of 1.53 mu m. Aluminum and chromium oxide films have been deposited on a number of substrates to impart improved corrosion resistance at high temperature. Titanium sub-oxides which are electrically conductive and corrosion resistant and stable in a number of aggressive environments have been deposited on various substrates. These sub-oxides are of great interest for use in electrochemical cells. Common features of all these depositions are the high deposition rate typical for cathodic are deposition, the good adhesion of the films due to the high metal ion energy, and the advantage of an environmentally clean method in comparison to wet-chemical oxide formation techniques. RP Anders, S (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Anders, Andre/B-8580-2009; Raoux, Simone/G-3920-2016 OI Anders, Andre/0000-0002-5313-6505; NR 26 TC 52 Z9 53 U1 1 U2 12 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD NOV PY 1995 VL 76 IS 1-3 BP 167 EP 173 PG 7 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA TM179 UT WOS:A1995TM17900027 ER PT J AU GOUDER, TH COLMENARES, CA AF GOUDER, TH COLMENARES, CA TI A SURFACE SPECTROSCOPIC STUDY OF THIN-LAYERS OF U ON POLYCRYSTALLINE PT SO SURFACE SCIENCE LA English DT Article DE AUGER ELECTRON SPECTROSCOPY; DIFFUSION AND MIGRATION; METAL-METAL INTERFACES; PHOTOELECTRON SPECTROSCOPY; PLATINUM; POLYCRYSTALLINE SURFACES; SURFACE CHEMICAL REACTION; URANIUM ID URANIUM; PHOTOEMISSION; UPT3 AB Thin layers of U on polycrystalline Pt have been prepared by magnetron sputter deposition and studied by X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS, respectively) and Auger electron spectroscopy (AES). The results of this study are compared to those of U deposited on Pd published previously [1]. We studied the mode of growth of U on the substrate, the evolution of the electronic structure of the surface, with special emphasis on the localization-delocalization of the U 5f states, and the diffusion of U into the bulk when the surface was annealed. We found U spontaneously reacting with Pt, immediately after deposition, to form a homogeneous surface alloy. Annealing results in the formation of more diluted surface alloys and, finally, in the diffusion of U into the bulk. A real time study of this process allowed us to follow the formation and disappearance of near surface alloys with decreasing U concentration. With dilution the U 5f band narrows but for all U concentrations we investigated the 5f states stayed itinerant. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. COMMISS EUROPEAN COMMUNITIES, EUROPEAN INST TRANSURANIUM ELEMENTS, W-7500 KARLSRUHE, GERMANY. NR 18 TC 12 Z9 18 U1 3 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD NOV 1 PY 1995 VL 341 IS 1-2 BP 51 EP 61 DI 10.1016/0039-6028(95)00730-X PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA TD749 UT WOS:A1995TD74900010 ER PT J AU BIRKENHEUER, U BOETTGER, JC ROSCH, N AF BIRKENHEUER, U BOETTGER, JC ROSCH, N TI A LOCAL-DENSITY FUNCTIONAL INVESTIGATION OF THE CLEAN AND THE HYDROGEN COVERED LI(001) SURFACE SO SURFACE SCIENCE LA English DT Article DE ALKALI METALS; CHEMISORPTION; DENSITY FUNCTIONAL CALCULATIONS; HYDROGEN; LOW INDEX SINGLE CRYSTAL SURFACES ID EMBEDDED-CLUSTER APPROACH; MOLECULAR-ORBITAL THEORY; ALKALI-METAL CLUSTERS; LI CLUSTERS; ELECTRONIC-STRUCTURE; BINDING-ENERGIES; LITHIUM CLUSTERS; H-CHEMISORPTION; ADSORPTION SITES; WORK FUNCTION AB A detailed density functional theory study on periodic slab models of the clean and the hydrogen covered Li(001) surface is presented to corroborate recent experiments on atomic hydrogen adsorption at lithium surfaces. Questions of model convergence as well as the bonding mechanism in the adsorption system are investigated. Several tools are employed to analyze the self-consistently determined electronic structure of the Li(001) and H/Li(001) slab models, among them one-particle core level shifts, overlap populations and density difference maps. To quantify the charge separation within the ionic surface layer formed in the H/Li(001) adsorption system, the topological atom approach and a recently developed technique uniquely based on the electrostatic potential above the surface are used. Lithium is found to behave to some extent like a covalent solid rather than an s electron metal, while the adsorption system H/Li at full monolayer coverage is best characterized by an insulator-metal interface. C1 TECH UNIV MUNICH,LEHRSTUHL THEORET CHEM,D-85747 GARCHING,GERMANY. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RI Roesch, Notker/C-1182-2010 NR 79 TC 17 Z9 17 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 NOV 1 PY 1995 VL 341 IS 1-2 BP 103 EP 123 DI 10.1016/0039-6028(95)00753-9 PG 21 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA TD749 UT WOS:A1995TD74900013 ER PT J AU KUHN, M RODRIGUEZ, JA HRBEK, J BZOWSKI, A SHAM, TK AF KUHN, M RODRIGUEZ, JA HRBEK, J BZOWSKI, A SHAM, TK TI ADSORPTION OF AU ON RU(001) - ELECTRONIC PERTURBATIONS AND THE NATURE OF THE BIMETALLIC BOND SO SURFACE SCIENCE LA English DT Letter DE AB INITIO QUANTUM CHEMICAL METHODS AND CALCULATIONS; GOLD; INTERFACE STATES; METAL-METAL INTERFACES; PHOTOELECTRON SPECTROSCOPY; RUTHENIUM ID TRANSITION-METAL ATOMS; THERMAL-DESORPTION; LEVEL SHIFTS; SURFACES; GROWTH; FILMS; AG; GOLD; CU; W(110) AB The electronic properties of Au/Ru(001) surfaces have been investigated using high-resolution photoemission spectroscopy with synchrotron radiation, and ab initio self-consistent-field calculations. For submonolayer coverages of Au, the interaction between the Au 5d and Ru 4d bands produces an interface state that appears at similar to 1.5 eV. A monolayer of Au in contact with Ru(001) has a Au 4f(7/2) binding energy of similar to 0.25 eV higher than that of the surface atoms of Au(111). The Au-Ru bond is complex with Au losing 5d electrons and gaining 6s and 6p electrons. This redistribution of charge affects the stability of the bimetallic bond. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV WESTERN ONTARIO,DEPT CHEM,LONDON,ON N6A 5B7,CANADA. RI Hrbek, Jan/I-1020-2013 NR 58 TC 22 Z9 22 U1 0 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 NOV 1 PY 1995 VL 341 IS 1-2 BP L1011 EP L1018 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA TD749 UT WOS:A1995TD74900002 ER PT J AU Anton, J Amils, R Smith, C LopezGarcia, P AF Anton, J Amils, R Smith, C LopezGarcia, P TI Comparative restriction maps of the archaeal megaplasmid pHM300 in different Haloferax mediterranei strains SO SYSTEMATIC AND APPLIED MICROBIOLOGY LA English DT Article DE Haloarchaea; megaplasmid; restriction map; pulsed-field gel electrophoresis ID GAS VESICLE SYNTHESIS; HALOBACTERIUM-HALOBIUM; HALOPHILIC ARCHAEBACTERIA; EXTRACHROMOSOMAL DNA; GEL-ELECTROPHORESIS; PHYSICAL MAP; PLASMID; VOLCANII; GENOME; POPULATIONS AB We have constructed the restriction maps of the circular megaplasmid pHM300 of five different Haloferax mediterranei strains (ATCC 33500, M2, M4, M6, M10), and a pigmentary mutant from one of them (M2a), using the endonucleases BamHI, SwaI, and BglII. Either one-dimensional pulsed-field gel electrophoresis (PFGE) or two-dimensional PFGE (2D-PFGE) were used to resolve the genomic fragments generate by these enzymes. For physical mapping, we combined hybridization with multiple digestion straegies. pHM300 maps were identical for strains ATCC 33500/M10 (315 kb), and M2 (M2b)/M4/M6 (330 kb), respectively, with some regions conserved in both map types. The main difference between them appeared to be an insertion that corresponds roughly to a 7 kb SwaI fragment containing an abnormal density of rare-cutter sires as well as repeated sequences. In M2a, pHM300 has only 145 kb, and most likely suffered a large deletion from its original template: pHM300 from M2b. C1 UNIV AUTONOMA MADRID, CTR BIOL MOLEC, E-28049 MADRID, SPAIN. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DEPT MOLEC & CELL BIOL, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV CHEM BIODYNAM, BERKELEY, CA 94720 USA. OI Smith, Cassandra/0000-0002-0346-8907 NR 38 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER GMBH, URBAN & FISCHER VERLAG PI JENA PA OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY SN 0723-2020 J9 SYST APPL MICROBIOL JI Syst. Appl. Microbiol. PD NOV PY 1995 VL 18 IS 3 BP 439 EP 447 PG 9 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA TL820 UT WOS:A1995TL82000015 ER PT J AU CHUANG, CC PENNER, JE AF CHUANG, CC PENNER, JE TI EFFECTS OF ANTHROPOGENIC SULFATE ON CLOUD DROP NUCLEATION AND OPTICAL-PROPERTIES SO TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY LA English DT Article ID AEROSOL SIZE DISTRIBUTIONS; CONDENSATION-NUCLEI; RADIATION; CLIMATE; ATMOSPHERE; PARTICLES; EVOLUTION; PACIFIC; LAYER; MODEL AB The characteristics of the cloud drop size distribution near cloud base are initially determined by the aerosol particles that serve as cloud condensation nuclei (CCN) and the updraft velocity. Changes in CCN concentrations can change cloud drop number thereby affecting cloud optical properties and the global radiation budget. The CCN concentration depends on the composition and size distribution of the aerosol particles. Chemical reactions of the emitted gaseous sulfur compounds due to human activities will alter, through gas-to-particle conversion, the aerosol size distribution, total number, and its chemical composition. It is important to assess these changes in order to estimate the effect of anthropogenic sulfur emissions on cloud drop number concentrations. Here, we assume that the aerosol size distribution is modified, with total number unchanged, by two processes: condensation of sulfuric acid vapor (H2SO4) on a prescribed pre-existing particle size distribution and aqueous-phase oxidation of SO2 followed by evaporation of the drops. We examine the relationship between the resulting anthropogenic sulfate-containing aerosol size distribution and cloud drop number concentrations. The results are used to estimate the possible change in cloud optical thickness and cloud albedo due to an increase of anthropogenic sulfate mass concentration. This work is aimed at improving the assessment of the effects of anthropogenic sulfate on cloud optical properties and the global radiation budget. RP CHUANG, CC (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV GLOBAL CLIMATE RES,LIVERMORE,CA 94551, USA. RI chuang, cathy/H-4814-2012; Penner, Joyce/J-1719-2012 NR 38 TC 43 Z9 43 U1 1 U2 3 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0280-6509 J9 TELLUS B JI Tellus Ser. B-Chem. Phys. Meteorol. PD NOV PY 1995 VL 47 IS 5 BP 566 EP 577 DI 10.1034/j.1600-0889.47.issue5.4.x PG 12 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TH996 UT WOS:A1995TH99600004 ER PT J AU Perry, SS Somorjai, GA Mate, CM White, RL AF Perry, Scott S. Somorjai, Gabor A. Mate, C. Mathew White, Richard L. TI Adhesion and friction properties of hydrogenated amorphous carbon films measured by atomic force microscopy SO TRIBOLOGY LETTERS LA English DT Article DE atomic force microscopy; adhesion; friction; amorphous carbon films; hydrogen effect AB Atomic force microscopy has been used to measure adhesion and friction forces at the interface between an oxidized metal probe tip and amorphous carbon films of varying hydrogen contents (12.3-39.0 atomic percent hydrogen). The interface of an oxide surface and a hard carbon coating models the unlubricated head-tisk interface of current hard disk products. Adhesion forces normalized by the radius of curvature of the contacting tip range from 1.09 to 8.53 N/m. Coefficients of friction values, measured as the slope of the friction versus load plot, range from 0.33 to 0.87. A trend of increasing adhesion forces and coefficients of friction is observed for increasing hydrogen content in the films. We attribute the increase in adhesion and friction to increases in the surface free energy of the carbon films with the incorporation of hydrogen. C1 [Perry, Scott S.; Somorjai, Gabor A.] Univ Calif Berkeley, Div Mat Sci, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Perry, Scott S.; Somorjai, Gabor A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Mate, C. Mathew] IBM Almaden Res Ctr, San Jose, CA 95120 USA. [White, Richard L.] IBM Corp, Storage Syst Div, San Jose, CA 95193 USA. RP Perry, SS (reprint author), Univ Houston, Dept Chem, Univ Pk, Houston, TX 77204 USA. FU University of California Berkeley; IBM Almaden Research Center (DOE CRADA) [BG95-172] FX We would like to thank Dr. Amir Berman, Dr. Frank Ogletree, Dr. Miquel Salmeron, and Mr. Joe Katz (Materials Science Division of the Lawrence Berkeley Laboratory) for their assistance in the design and construction of the atomic force microscope. We would like to acknowledge the work of R. H. Wang and Andrew Kellock (IBM) in providing RBS and ERS analysis. This work was supported by a Department of Energy Cooperative Research and Development Agreement between the University of California Berkeley ( LBL) and the IBM Almaden Research Center (DOE CRADA # BG95-172). NR 26 TC 24 Z9 24 U1 1 U2 7 PU SPRINGER/PLENUM PUBLISHERS PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1023-8883 J9 TRIBOL LETT JI Tribol. Lett. PD NOV PY 1995 VL 1 IS 2-3 BP 233 EP 246 PG 14 WC Engineering, Chemical; Engineering, Mechanical SC Engineering GA V17RY UT WOS:000207955500014 ER PT J AU SIMMONS, CS GINN, TR WOOD, BD AF SIMMONS, CS GINN, TR WOOD, BD TI STOCHASTIC-CONVECTIVE TRANSPORT WITH NONLINEAR REACTION - MATHEMATICAL FRAMEWORK SO WATER RESOURCES RESEARCH LA English DT Article ID HETEROGENEOUS POROUS FORMATIONS; TRANSFER-FUNCTION MODEL; ADSORBING SOLUTE TRANSPORT; FIELD SCALE; UNSATURATED ZONE; SORBING SOLUTES; SORPTIVE SOLUTE; SPATIAL MOMENTS; MASS ARRIVAL; SOIL AB A stochastic-convective reactive (SCR) transport method is developed for one-dimensional steady transport in physically heterogeneous media with nonlinear degradation. The method is free of perturbation amplitude limitations and circumvents the difficulty of scale dependence of phenomenological parameters by avoiding volume-averaged specifications of diffusive/dispersive fluxes. The transport system is conceptualized as an ensemble of independent convective-reactive streamlines, each characterized by a randomized convective velocity (or travel time). Dispersive effects are treated as a component of the randomness in the streamline velocity ensemble, so no explicit expression for hydrodynamic dispersive flux is written in the streamline transport equation. The expected value of the transport over the stream tube ensemble is obtained as an average of solutions to the reactive convection equation according to the stream tube (travel time) probability distribution function. In this way, transport with reaction can be expressed in terms of global-scale random variables, such as solute travel time and travel distance, which are integrals of the stochastic variables such as velocity. Derivations support the hypothesis that via the SCR the decay process can be factored out of the mechanical transport behavior (as reflected by movement of a passive tracer) and scaled independently. Solution strategies are presented for general linear and nonlinear kinetic reactions. Demonstration simulations show that for Fickian transport with nonlinear reactions the SCR and convection dispersion equation can give different results. Ginn et al. (this issue) extend the SCR solution to coupled nonlinear equations, to accommodate Michaelis-Menten biodegradation of solute with an accounting of microbial growth. RP SIMMONS, CS (reprint author), PACIFIC NW LAB, CTR EARTH & ENVIRONM SCI, 3200 Q AVE, RICHLAND, WA 99352 USA. RI Wood, Brian/K-4025-2012; Wood, Brian/J-8362-2013 OI Wood, Brian/0000-0003-3152-7852; Wood, Brian/0000-0003-3152-7852 NR 73 TC 70 Z9 70 U1 1 U2 10 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 NOV PY 1995 VL 31 IS 11 BP 2675 EP 2688 DI 10.1029/95WR02178 PG 14 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA TD805 UT WOS:A1995TD80500005 ER PT J AU GINN, TR SIMMONS, CS WOOD, BD AF GINN, TR SIMMONS, CS WOOD, BD TI STOCHASTIC-CONVECTIVE TRANSPORT WITH NONLINEAR REACTION - BIODEGRADATION WITH MICROBIAL-GROWTH SO WATER RESOURCES RESEARCH LA English DT Article AB The representation of subsurface flow and reactive transport as an ensemble of one-dimensional stream tubes is extended to account for nonlinear biodegradation with coupled microbial growth. The stochastic-convective reaction (SCR) model is derived for bioreaction of a single solute by a single class of microorganisms coupled with dynamic microbial growth. A new global variable, the integral of the solute degraded per unit length of system traversed, accounts for degradation. Dimensionless scaling and the method of characteristics are used to reduce the model, written for a single convecting reactor (stream tube), to a pair of coupled nonlinear functional equations for solute concentration and microbial biomass. Existence of a solution to the stream tube system is shown, both numerical and approximate analytical approaches to the solution are given, and example computations using both methods are presented. Conditions under which the stream tube solution is ''canonical,'' or scalable to fit any permissible stream tube travel time function, arise from requirements for invariance (over the stream tube ensemble) of effective one-dimensional stream tubes used to represent transport along real stream tubes in three-dimensional space. Averaging of the stream tube solution over travel time and reaction properties representative of physical and chemical heterogeneities is described as a way to separate and upscale the processes of macrodispersion and microbiological reaction. The approach is exercised to simulate Monte Carlo average behavior of bioreactive transport in physically heterogeneous two-dimensional media. Results show that the method captures the ensemble average large-scale effects of the nonlinear reactions more accurately than done in the classical reactive convection-dispersion equation (CDR), even when the appropriate scale dependent dispersion coefficient is afforded to the CDR. RP GINN, TR (reprint author), PACIFIC NW LAB, CTR EARTH & ENVIRONM SCI, 3200 Q AVE, RICHLAND, WA 99352 USA. RI Wood, Brian/K-4025-2012; Wood, Brian/J-8362-2013 OI Wood, Brian/0000-0003-3152-7852; Wood, Brian/0000-0003-3152-7852 NR 14 TC 66 Z9 67 U1 1 U2 7 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 NOV PY 1995 VL 31 IS 11 BP 2689 EP 2700 DI 10.1029/95WR02179 PG 12 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA TD805 UT WOS:A1995TD80500006 ER PT J AU BERGER, DD AF BERGER, DD TI VACUUM BRAZING TITANIUM TO INCONEL SO WELDING JOURNAL LA English DT Article RP BERGER, DD (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 4 TC 4 Z9 4 U1 0 U2 0 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD NOV PY 1995 VL 74 IS 11 BP 35 EP 38 PG 4 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA TC026 UT WOS:A1995TC02600007 ER PT J AU ZACHARIA, T DAVID, SA VITEK, JM KRAUS, HG AF ZACHARIA, T DAVID, SA VITEK, JM KRAUS, HG TI SURFACE-TEMPERATURE DISTRIBUTION OF GTA WELD POOLS ON THIN-PLATE 304-STAINLESS-STEEL SO WELDING JOURNAL LA English DT Article DE SURFACE TEMPERATURE; TEMPERATURE DISTRIBUTION; GTAW POOLS; THIN-PLATE 304 SS; COMPUTATIONAL MODEL; MULTIDIMENSIONAL; HEAT FLOW; FLUID FLOW; CONVECTION HEAT TRANSFER; MODEL VERIFICATION ID FLUID-FLOW; PENETRATION AB A transient multidimensional computational model was utilized to study gas tungsten are (CTA) welding of thin-plate 304 stainless steel (SS). The model eliminates several of the earlier restrictive assumptions including temperature-independent thermal-physical properties. Consequently, all important thermal-physical properties were considered as temperature dependent throughout the range of temperatures experienced by the weld metal. The computational model was used to predict surface temperature distribution of the GTA weld pools in 1.5-mm-thick AISI 304 SS. The welding parameters were chosen so as to correspond with an earlier experimental study that produced high-resolution surface temperature maps. One of the motivations of the present study was to verify the predictive capability of the computational model. Comparison of the numerical predictions and experimental observations indicate excellent agreement, thereby verifying the model. C1 EG&G IDAHO INC, IDAHO NATL ENGN LAB, IDAHO FALLS, ID USA. RP ZACHARIA, T (reprint author), OAK RIDGE NATL LAB, DIV MET & CERAM, POB 2008, OAK RIDGE, TN 37831 USA. NR 28 TC 15 Z9 16 U1 0 U2 0 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD NOV PY 1995 VL 74 IS 11 BP S353 EP S362 PG 10 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA TC026 UT WOS:A1995TC02600014 ER PT J AU RUBEHN, T MULLER, WFJ BASSINI, R BEGEMANNBLAICH, M BLAICH, T FERRERO, A GROSS, C IMME, G IORI, I KUNDE, GJ KUNZE, WD LINDENSTRUTH, V LYNEN, U MOHLENKAMP, T MORETTO, LG OCKER, B POCHODZALLA, J RACITI, G REITO, S SANN, H SCHUTTAUF, A SEIDEL, W SERFLING, V TRAUTMANN, W TRZCINSKI, A VERDE, G WORNER, A ZUDE, E ZWIEGLINSKI, B AF RUBEHN, T MULLER, WFJ BASSINI, R BEGEMANNBLAICH, M BLAICH, T FERRERO, A GROSS, C IMME, G IORI, I KUNDE, GJ KUNZE, WD LINDENSTRUTH, V LYNEN, U MOHLENKAMP, T MORETTO, LG OCKER, B POCHODZALLA, J RACITI, G REITO, S SANN, H SCHUTTAUF, A SEIDEL, W SERFLING, V TRAUTMANN, W TRZCINSKI, A VERDE, G WORNER, A ZUDE, E ZWIEGLINSKI, B TI ELECTROMAGNETIC FISSION OF U-238 AT 600 AND 1000 MEV PER NUCLEON SO ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI LA English DT Article ID RELATIVISTIC HEAVY-IONS; ELECTRIC QUADRUPOLE EXCITATIONS; PHOTOFISSION CROSS-SECTIONS; NEUTRON-INDUCED FISSION; GIANT-DIPOLE RESONANCE; ENERGY-RANGE; MASS DISTRIBUTIONS; AU-197 TARGETS; DISSOCIATION; COLLISIONS AB Electromagnetic fission of U-238 projectiles at E/A = 600 and 1000 MeV was studied with the ALADIN spectrometer at the heavy-ion synchrotron SIS. Seven different targets (Be, C, Al, Cu, In, Au and U) were used. By considering only those fission events where the two charges added up to 92, most of the nuclear interactions were excluded. The nuclear contributions to the measured fission cross sections were determined by extrapolating from beryllium to the heavier targets with the concept of factorization. The obtained cross sections for electromagnetic fission are well reproduced by extended Weizsacker-Williams calculations which include E1 and E2 excitations. The asymmetry of the fission fragments' charge distribution gives evidence for the excitation of the double giant-dipole resonance in uranium. C1 UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. UNIV MAINZ,INST KERNCHEM,D-55099 MAINZ,GERMANY. UNIV CATANIA,DIPARTIMENTO FIS,I-95129 CATANIA,ITALY. IST NAZL FIS NUCL,I-95129 CATANIA,ITALY. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV FRANKFURT,INST KERNPHYS,D-60486 FRANKFURT,GERMANY. SOLTAN INST NUCL STUDIES,PL-00681 WARSAW,POLAND. RP RUBEHN, T (reprint author), GESELL SCHWERIONENFORSCH MBH,D-64220 DARMSTADT,GERMANY. RI Verde, Giuseppe/J-3609-2012; OI Reito, Santo/0000-0002-9321-9970 NR 53 TC 31 Z9 31 U1 0 U2 3 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 NOV PY 1995 VL 353 IS 2 BP 197 EP 204 DI 10.1007/BF01295898 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA TH415 UT WOS:A1995TH41500013 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML 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 BARBIN, DY BAKER, 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 BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E 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 CASSIO, V GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAPKIN, M 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 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 SANTO, ME FASSOULIOTIS, D FEINDT, M FENYUK, A 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 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 HAKANSSON, A 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 JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L 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, I KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMBROPOULOS, C 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 MALTEZOS, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SMI MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, M MEDBO, J MERONI, C METER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIN, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S 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 OSTANKOV, A 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 PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POI, 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 RICHARDON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M 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 SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, L STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORASSA, E 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 VANDERVELDE, C 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 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 ZACH, F ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G AF ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALLPORT, PP ALMEHED, S ALMEIDA, FML 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 BARBIN, DY BAKER, 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 BELTRAN, P BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BIGI, M BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLUME, M BLYTH, S BOCCI, V BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E 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 CASSIO, V GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAPKIN, M 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 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 SANTO, ME FASSOULIOTIS, D FEINDT, M FENYUK, A 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 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 HAKANSSON, A 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 JACOBSSON, R JALOCHA, P JANIK, R JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONSSON, L 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, I KRUMSTEIN, Z KRUPINSKI, W KUBINEC, P KUCEWICZ, W KURVINEN, K LACASTA, C LAKTINEH, I LAMBLOT, S LAMBROPOULOS, C 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 MALTEZOS, A MALYCHEV, V MANDL, F MARCO, J MARECHAL, B MARGONI, M MARIN, JC MARIOTTI, C MARKOU, A MARON, T MARTINEZRIVERO, C MARTINEZVIDAL, F GARCIA, SMI MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, M MEDBO, J MERONI, C METER, WT MICHELOTTO, M MIGLIORE, E MIRABITO, L MITAROFF, WA MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MUNDIN, LM MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NAVAS, S 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 OSTANKOV, A 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 PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PHILLIPS, HT PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POI, 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 RICHARDON, J RIDKY, J RINAUDO, G RIPP, I ROMERO, A RONCAGLIOLO, I RONCHESE, P ROOS, L ROSENBERG, EI ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SADOVSKY, A SAJOT, G SALT, J SANCHEZ, J SANNINO, M 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 SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVITSKI, L STAVROPOULOS, G STEPANIAK, K STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M TABARELLI, T TAVERNET, JP TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TKATCHEV, LG TODOROV, T TOET, DZ TOMARADZE, A TORASSA, E 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 VANDERVELDE, C 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 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 ZACH, F ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R ZUCCHELLI, GC ZUMERLE, G TI PRODUCTION OF STRANGE B-BARYONS DECAYING INTO XI-/+-L-/+ PAIRS AT LEP SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID Z0 DECAYS AB An excess of events containing, in a jet, a same-sign Xi(-/+) - l(-/+) pair as compared to those with an opposite-sign Xi(-/+) - l(-/+) pair has been observed in an analysis of 1.7 million hadronic Z(o) decays collected by the DELPHI detector at LEP between 1991 and 1993 inclusive. The probability for this signal to come from non B-baryon decays is less than 5 x 10(-4). The measured production fraction corresponds to: P(b --> B - baryon) x BR(B - baryon --> Xi(-) l(-) X) = (5.9 +/- 2.1 +/- 1.0) x 10(-4), per lepton species, averaged for electrons and muons and assuming the two channels have an equal contribution. Semileptonic decays of Lambda(b) baryons can account for less than 10% of these events and the major part of the signal has to originate from Xi(b) semileptonic decays, Using the subsample of these events where the Xi(-/+) trajectory has been measured in the Vertex Detector, the lifetime of B-baryons producing a Xi(-/+) in their semileptonic decay final state is found to be: tau(B - baryon --> Xi(-) l(-) X) = 1.5(-0.4)(+0.7) +/- 0.3 ps. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO 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,PHYS CORPUSCULAIRE LAB,CNRS,IN2P3,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. UNIV STRASBOURG 1,CTR RECH NUCL,CNRS,IN2P3,F-67037 STRASBOURG,FRANCE. DEMOKRITOS NATL CTR SCI RES,INST PHYS NUCL,GR-15310 ATHENS,GREECE. FZU,INST PHYS,CR-18040 PRAGUE 8,CZECH REPUBLIC. ACAD SCI CZECH REPUBL,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 NUCL SCI,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. LIP,IST,FCUL,P-1000 LISBON,PORTUGAL. UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV PARIS 06,LPNHE,CNRS,IN2P3,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,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,MFF,CTR NUCL,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. 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,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. IST NAZL FIS NUCL,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTMENTO FIS,I-34127 TRIESTE,ITALY. IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV FED RIO DE JANEIRO,BR-21945970 RIO JANEIRO,BRAZIL. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. CSIC,IFIC,E-46100 BURJASSOT,SPAIN. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL 1,GERMANY. FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM. RP ABREU, P (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Torassa, Ezio/I-1788-2012; Fruhwirth, Rudolf/H-2529-2012; 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; Dracos, Marcos/K-2335-2012; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Michelotto, Michele/A-9571-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Monge, Maria Roberta/G-9127-2012; Nemecek, Stanislav/G-5931-2014; Ridky, Jan/H-6184-2014; Fernandez, Ester/K-9734-2014; Espirito Santo, Maria Catarina/L-2341-2014; Pimenta, Mario/M-1741-2013; gandelman, miriam/N-3739-2014; Ragazzi, Stefano/D-2463-2009; 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; Barao, Fernando/O-2357-2016; Navas, Sergio/N-4649-2014; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017 OI 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; Dracos, Marcos/0000-0003-0514-193X; Michelotto, Michele/0000-0001-6644-987X; 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; 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; Barao, Fernando/0000-0002-8346-9941; Navas, Sergio/0000-0003-1688-5758; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368 NR 20 TC 30 Z9 30 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 NOV PY 1995 VL 68 IS 4 BP 541 EP 553 PG 13 WC Physics, Particles & Fields SC Physics GA TB763 UT WOS:A1995TB76300003 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 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 CAPUA, M GARFAGNINI, A 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 HAAS, T 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 KORZHAVINA, IA KUZMIN, VA LUKINA, OY 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 JOE, 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 ZAMECKI, 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 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 CAPUA, M GARFAGNINI, A 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 HAAS, T 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 KORZHAVINA, IA KUZMIN, VA LUKINA, OY 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 JOE, 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 ZAMECKI, 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 MEASUREMENT OF THE DIFFRACTIVE STRUCTURE-FUNCTION IN DEEP-INELASTIC SCATTERING AT HERA SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LUND MONTE-CARLO; CENTRAL TRACKING DETECTOR; POMERON STRUCTURE; JET FRAGMENTATION; E+E-PHYSICS; ZEUS; VERSION; DISSOCIATION; CALORIMETER; SINGULARITY AB This paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced in ep interactions at HERA. The events are characterised by a rapidity gap between the outgoing proton system and the remaining hadronic system. Inclusive distributions are presented and compared with Monte Carlo models for diffractive processes. The data are consistent with models where the pomeron structure function has a hard and a soft contribution. The diffractive structure function is measured as a function of x(p), the momentum fraction lost by the proton, of beta, the momentum fraction of the struck quark with respect to x(p), and of Q(2) in the range 6.3 10(-4) < x(p) < 10(-2), 0.1 < .beta < 0.8 and 8 < Q(2) < 100 GeV2. The x(p) dependence is consistent with the form (1/x(p))(alpha) where alpha = 1.30 +/- 0.08 (stat)(-0.14)(+0.08) (sys) in all bins of beta and Q(2). In the measured Q(2) range, the diffractive structure function approximately scales with Q(2) at fixed beta. In an Ingelman-Schlein type model where commonly used pomeron flux factor normalisations are assumed, it is found that the quarks within the pomeron do not saturate the momentum sum rule. C1 UNIV BOLOGNA, BOLOGNA, ITALY. IST NAZL FIS NUCL, BOLOGNA, ITALY. UNIV BONN, INST PHYS, BONN, GERMANY. UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND. BROOKHAVEN NATL LAB, UPTON, NY USA. UNIV CALABRIA, DEPT PHYS, I-87036 COSENZA, ITALY. IST NAZL FIS NUCL, I-87036 COSENZA, ITALY. COLUMBIA UNIV, NEVIS LABS, IRVINGTON, NY USA. INST PHYS NUCL, KRAKOW, POLAND. ACAD MIN & MET CRACOW, FAC PHYS & NUCL TECH, KRAKOW, POLAND. JAGIELLONIAN UNIV, DEPT PHYS, KRAKOW, POLAND. DESY, W-2000 HAMBURG, GERMANY. DESY, INST HOCHENERGIEPHYS, ZEUTHEN, GERMANY. UNIV FLORENCE, 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 EXPTL PHYS 2, HAMBURG, GERMANY. UNIV LONDON IMPERIAL COLL SCI & TECHNOL, 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, I-00185 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, IL-69978 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, 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 NUCL PHYS, IL-76100 REHOVOT, ISRAEL. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. YORK UNIV, DEPT PHYS, N YORK, ON M3J 1P3, CANADA. IROE, FLORENCE, ITALY. RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Bashkirov, Vladimir/A-4818-2008; De Pasquale, Salvatore/B-9165-2008; Golubkov, Yury/E-1643-2012; Doyle, Anthony/C-5889-2009; Proskuryakov, Alexander/J-6166-2012; Katz, Uli/E-1925-2013; Wiggers, Leo/B-5218-2015; Lancaster, Mark/C-1693-2008; Gladilin, Leonid/B-5226-2011; Tassi, Enrico/K-3958-2015; Solomin, Anatoly/C-3072-2016; Hernandez Calama, Jose Maria/H-9127-2015; Morandin, Mauro/A-3308-2016; Graciani Diaz, Ricardo/I-5152-2016; Capua, Marcella/A-8549-2015; OI De Pasquale, Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195; Katz, Uli/0000-0002-7063-4418; Wiggers, Leo/0000-0003-1060-0520; Gladilin, Leonid/0000-0001-9422-8636; Hernandez Calama, Jose Maria/0000-0001-6436-7547; Morandin, Mauro/0000-0003-4708-4240; Graciani Diaz, Ricardo/0000-0001-7166-5198; Anzivino, Giuseppina/0000-0002-5967-0952; Castellini, Guido/0000-0002-0177-0643; Capua, Marcella/0000-0002-2443-6525; Lancaster, Mark/0000-0002-8872-7292; Utley, Martin/0000-0001-9928-1516 NR 61 TC 164 Z9 164 U1 0 U2 0 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 NOV PY 1995 VL 68 IS 4 BP 569 EP 584 PG 16 WC Physics, Particles & Fields SC Physics GA TB763 UT WOS:A1995TB76300005 ER PT J AU MOKLER, PH STOHLKER, T DUNFORD, RW GALLUS, A KANDLER, T MENZEL, G PRINZ, HT RYMUZA, P STACHURA, Z SWIAT, P WARCZAK, A AF MOKLER, PH STOHLKER, T DUNFORD, RW GALLUS, A KANDLER, T MENZEL, G PRINZ, HT RYMUZA, P STACHURA, Z SWIAT, P WARCZAK, A TI THE X-RAY-SPECTRUM OF H-LIKE URANIUM SO ZEITSCHRIFT FUR PHYSIK D-ATOMS MOLECULES AND CLUSTERS LA English DT Note ID LAMB SHIFT; HYDROGENLIKE; HELIUM AB By decelerating highly-charged, very heavy ions to low energies in the storage and cooler ring, ESR, a new brilliant source for projectile x-rays has been obtained. In a first precision spectroscopy experiment up to 2 . 10(7) stored bare U92+ ions have been decelerated down to 49 MeV/u before detecting the characteristic projectile x-rays associated with one-electron capture at the ESR gas target. The Lyman, Balmer and Paschen series are distinctly observed for hydrogenic U91+ ions. C1 ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. INST NUCL STUDIES,PL-05400 OTWOCK,POLAND. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. JAGIELLONIAN UNIV,INST PHYS,PL-30059 KRAKOW,POLAND. RP MOKLER, PH (reprint author), GSI DARMSTADT,D-64220 DARMSTADT,GERMANY. NR 16 TC 4 Z9 4 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0178-7683 J9 Z PHYS D ATOM MOL CL JI Z. Phys. D-Atoms Mol. Clusters PD NOV PY 1995 VL 35 IS 2 BP 77 EP 80 PG 4 WC Physics, Atomic, Molecular & Chemical SC Physics GA TG603 UT WOS:A1995TG60300001 ER PT J AU WALCZAK, MM ALVES, CA LAMP, BD PORTER, MD AF WALCZAK, MM ALVES, CA LAMP, BD PORTER, MD TI ELECTROCHEMICAL AND X-RAY PHOTOELECTRON SPECTROSCOPIC EVIDENCE FOR DIFFERENCES IN THE BINDING-SITES OF ALKANETHIOLATE MONOLAYERS CHEMISORBED AT GOLD SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article DE XPS; BINDING SITES; AU; ALKANETHIOLATES ID SELF-ASSEMBLED MONOLAYERS; SCANNING TUNNELING MICROSCOPY; QUARTZ CRYSTAL MICROBALANCE; UNDERPOTENTIAL DEPOSITION; SINGLE-CRYSTALS; STRUCTURAL CHARACTERIZATION; REDUCTIVE DESORPTION; THIOLATE MONOLAYERS; ORGANIC MONOLAYERS; MASS-SPECTROMETRY AB Voltammetric data for the reductive desorption of alkanethiolate monolayers from gold electrodes reveal the presence of different adsorbate binding sites. This conclusion is based on a series of characterizations of monolayers formed from butanethiol and octanethiol at annealed mica-supported gold (Au/mica) and at gold supported by both chromium-primed silicon (Au/Si) and glass (Au/glass). At Au/mica, a single wave is observed for the desorption induced by a linear voltage scan. The voltammetry at Au/Si and Au/glass is, however, comparatively more complex, as reflected by the presence of at least one additional desorption wave. Results from structural characterizations (IR and X-ray photoelectron spectroscopies and electrochemical capacitance measurements) of the monolayers formed at each type of substrate and from morphological assessments (X-ray diffraction, underpotential metal deposition, and scanning tunneling microscopy) of the underlying substrates reveal that the differences in the voltammetry originate from differences in the microscopic roughnesses of the two types of substrates. Importantly, the morphological data indicate that the bulk of the gold films on all three supports has a pronounced (111) crystallinity, that the surface at Au/Mica is strongly (111) terraced, but that the surfaces at Au/Si and Au/glass have a much higher density of steps. The voltammetry at Au/mica, therefore, represents desorption from sites at Au(111) terraces. On the contrary, the voltammetry at Au/glass or Au/Si reflects desorption from both terrace and step sites with the adsorbates at step sites bound by as much as 25 kJ mol(-1) more strongly than at terrace sites. The implications of our findings for descriptions of the nucleation and growth of these systems are discussed. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. NR 88 TC 217 Z9 218 U1 3 U2 30 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD OCT 31 PY 1995 VL 396 IS 1-2 BP 103 EP 114 DI 10.1016/0022-0728(95)04056-T PG 12 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA TE607 UT WOS:A1995TE60700015 ER PT J AU LIN, XW BEHAR, M MALTEZ, R SWIDER, W LILIENTALWEBER, Z WASHBURN, J AF LIN, XW BEHAR, M MALTEZ, R SWIDER, W LILIENTALWEBER, Z WASHBURN, J TI SYNTHESIS OF GAN BY N ION-IMPLANTATION IN GAAS(001) SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; GROWTH AB Both the hexagonal and cubic GaN phases were synthesized in GaAs (001) by 50 keV N ion implantation at 380 degrees C and subsequent furnace annealing at 850-950 degrees C for 10 min-2 h. For a fluence of 1.5 x 10(17) cm(-2), transmission electron microscopy revealed that cubic GaN epitaxially crystallizes as precipitates in the GaAs matrix. A cubic-to-hexagonal GaN phase transition was observed for extended thermal anneals. By increasing the N fluence to 3 X 10(17) cm(-2), a continuous buried layer of randomly oriented hexagonal-GaN nanocrystals was produced. (C) 1995 American Institute of Physics. C1 UNIV FED RIO GRANDE SUL,INST FIS,BR-91501 PORTO ALEGRE,RS,BRAZIL. RP LIN, XW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Liliental-Weber, Zuzanna/H-8006-2012; Maltez, Rogerio/K-1173-2016 OI Maltez, Rogerio/0000-0002-8653-6118 NR 13 TC 50 Z9 50 U1 0 U2 10 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 OCT 30 PY 1995 VL 67 IS 18 BP 2699 EP 2701 DI 10.1063/1.114297 PG 3 WC Physics, Applied SC Physics GA TB959 UT WOS:A1995TB95900039 ER PT J AU LACH, J ZENCZYKOWSKI, P AF LACH, J ZENCZYKOWSKI, P TI HYPERON RADIATIVE DECAYS SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Review ID BARYON MAGNETIC-MOMENTS; VECTOR-MESON DOMINANCE; BRANCHING RATIO; WEAK DECAYS; ASYMMETRY PARAMETER; SIGMA+->P-GAMMA DECAY; CONSTITUENT GLUONS; 1ST MEASUREMENT; QUARK-MODEL; S-WAVE AB We review the experimental and theoretical status of weak radiative hyperon decays. Our discussion centers on a controversy over the validity of Hara's theorem, which was originally expected to be respected by these decays. After presenting the hadron level theorem we describe experiments that have provided convincing evidence against its applicability to these decays. In the theoretical part we juxtapose the hadron level and quark level approaches and discuss the violation of Hara's theorem in the latter. We review quark model phenomenology, which offers a promising description of experimental data. Measurements that should be made to settle the theoretical controversy are pinpointed. The importance of radiative hyperon decays in understanding the nonlocal composite nature of hadrons is stressed. C1 INST NUCL PHYS, PL-31342 KRAKOW, POLAND. RP FERMILAB NATL ACCELERATOR LAB, POB 500, MS 220, BATAVIA, IL 60510 USA. NR 152 TC 50 Z9 51 U1 1 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X EI 1793-656X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD OCT 30 PY 1995 VL 10 IS 27 BP 3817 EP 3876 DI 10.1142/S0217751X95001807 PG 60 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA TD012 UT WOS:A1995TD01200001 ER PT J AU BENDER, CM BOETTCHER, S MEISINGER, PN AF BENDER, CM BOETTCHER, S MEISINGER, PN TI UNIVERSALITY IN RANDOM-WALK MODELS WITH BIRTH AND DEATH SO PHYSICAL REVIEW LETTERS LA English DT Article AB Models of random walks are considered in which walkers are born at one site and die at all other sites. Steady-state distributions of walkers exhibit dimensionally dependent critical behavior as a function of the birth rate. Exact analytical results for a hyperspherical lattice yield a second-order phase transition with a nontrivial critical exponent for all positive dimensions D not equal 2, 4. studies of hypercubic and fractal lattices indicate that these exact results are universal. elucidates the adsorption transition of polymers at curved interfaces. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP BENDER, CM (reprint author), WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130, USA. RI Boettcher, Stefan/G-2640-2010 OI Boettcher, Stefan/0000-0003-1273-6771 NR 14 TC 9 Z9 9 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 OCT 30 PY 1995 VL 75 IS 18 BP 3210 EP 3213 DI 10.1103/PhysRevLett.75.3210 PG 4 WC Physics, Multidisciplinary SC Physics GA TB559 UT WOS:A1995TB55900003 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 BLOOM, P BOEHNLEIN, A BOJKO, NI BORCHERDING, F BORDERS, J BOSWELL, C BRANDT, A BROCK, R BROSS, A BUCHHOLZ, D BURTOVOI, VS BUTLER, JM CARVALHO, W 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, MAC 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 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 FUESS, S GALLAS, E GALYAEV, AN GAO, SG GELD, TL GENIK, RJ GENSER, K GERBER, CE GIBBARD, B GLEBOV, V GLENN, S GOBBI, B GOFORTH, M GOLDSCHMIDT, A GOMEZ, B GONCHAROV, PI SOLIS, JLG GORDON, H GOSS, LT GRAF, N GRANNIS, PD GREEN, DR GREEN, J GREENLEE, H GRIFFIN, G GROSSMAN, N GRUDBERG, P GRUNENDAHL, S GU, WX GUGLIELMO, G GUIDA, JA GUIDA, JM GURYN, W GURZHIEV, SN GUTIERREZ, P 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 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 KALBFLEISCH, G KANG, JS KEHOE, R KELLY, ML 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 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 MCMAHON, T MELANSON, HL NETO, JRTD MERRITT, KW MIETTINEN, H MILDER, A 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 NICOLA, M 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 RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H SCULLI, J SHABALINA, E SHAFFER, C SHANKAR, HC SHAO, YY 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 STOIANOVA, DA STOKER, D STREETS, K STROVINK, M SZNAJDER, A 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, G WANG, J WARCHOL, J WAYNE, M WEERTS, H WEN, F WENZEL, WA WHITE, A WHITE, JT WIGHTMAN, JA WILCOX, J WILLIS, S WIMPENNY, SJ WIRJAWAN, JVD 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, DH ZHANG, Y ZHU, Q ZHU, ZH ZIEMINSKA, D ZIEMINSKI, 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 BLOOM, P BOEHNLEIN, A BOJKO, NI BORCHERDING, F BORDERS, J BOSWELL, C BRANDT, A BROCK, R BROSS, A BUCHHOLZ, D BURTOVOI, VS BUTLER, JM CARVALHO, W 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, MAC 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 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 FUESS, S GALLAS, E GALYAEV, AN GAO, SG GELD, TL GENIK, RJ GENSER, K GERBER, CE GIBBARD, B GLEBOV, V GLENN, S GOBBI, B GOFORTH, M GOLDSCHMIDT, A GOMEZ, B GONCHAROV, PI SOLIS, JLG GORDON, H GOSS, LT GRAF, N GRANNIS, PD GREEN, DR GREEN, J GREENLEE, H GRIFFIN, G GROSSMAN, N GRUDBERG, P GRUNENDAHL, S GU, WX GUGLIELMO, G GUIDA, JA GUIDA, JM GURYN, W GURZHIEV, SN GUTIERREZ, P 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 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 KALBFLEISCH, G KANG, JS KEHOE, R KELLY, ML 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 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 MCMAHON, T MELANSON, HL NETO, JRTD MERRITT, KW MIETTINEN, H MILDER, A 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 NICOLA, M 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 RUBINOV, P RUCHTI, R RUSIN, S RUTHERFOORD, J SANTORO, A SAWYER, L SCHAMBERGER, RD SCHELLMAN, H SCULLI, J SHABALINA, E SHAFFER, C SHANKAR, HC SHAO, YY 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 STOIANOVA, DA STOKER, D STREETS, K STROVINK, M SZNAJDER, A 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, G WANG, J WARCHOL, J WAYNE, M WEERTS, H WEN, F WENZEL, WA WHITE, A WHITE, JT WIGHTMAN, JA WILCOX, J WILLIS, S WIMPENNY, SJ WIRJAWAN, JVD 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, DH ZHANG, Y ZHU, Q ZHU, ZH ZIEMINSKA, D ZIEMINSKI, A ZYLBERSTEJN, A TI STUDY OF THE STRONG-COUPLING CONSTANT USING W-PLUS JET PROCESSES SO PHYSICAL REVIEW LETTERS LA English DT Article ID ALPHA-S; COLLIDER AB The ratio of the number of W + 1 jet to W + 0 jet events is measured with the D0 detector using data from the 1992-93 Tevatron Collider run. For the W --> ev channel with a minimum jet E(T) cutoff of 25 GeV, the experimental ratio is 0.065 +/- 0.O03(stat) +/- 0.007(syst). Next-to-leading order QCD predictions for various parton distributions agree well with each other and are all over 1 standard deviation below the measurement. Varying the strong coupling constant alpha(s) in both the parton distributions and the partonic cross sections simultaneously does not remove this discrepancy. 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 & ESTUDIOS AVANZADOS,MEXICO CITY,DF,MEXICO. COLUMBIA UNIV,NEW YORK,NY 10027. UNIV DELHI,DELHI 110007,INDIA. UNIV HAWAII,HONOLULU,HI 96822. FLORIDA STATE UNIV,TALLAHASSEE,FL 32306. UNIV ILLINOIS,CHICAGO,IL 60607. 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 OKLAHOMA,NORMAN,OK 73019. UNIV PANJAB,CHANDIGARH 160014,INDIA. INST HIGH ENERGY PHYS,PROTVINO 142284,RUSSIA. PURDUE UNIV,W LAFAYETTE,IN 47907. RICE UNIV,HOUSTON,TX 77251. UNIV ESTADUAL RIO DE JANEIRO,RIO JANEIRO,BRAZIL. UNIV ROCHESTER,ROCHESTER,NY 14627. CTR ETUD SACLAY,DAPNIA,SERV PHYS PARTICULES,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 Aihara, Hiroaki/F-3854-2010; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; 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; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015; de Mello Neto, Joao/C-5822-2013; Taketani, Atsushi/E-1803-2017 OI Aihara, Hiroaki/0000-0002-1907-5964; Klyukhin, Vyacheslav/0000-0002-8577-6531; De, Kaushik/0000-0002-5647-4489; Kim, Sun Kee/0000-0002-0013-0775; de Mello Neto, Joao/0000-0002-3234-6634; Taketani, Atsushi/0000-0002-4776-2315 NR 18 TC 24 Z9 24 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 OCT 30 PY 1995 VL 75 IS 18 BP 3226 EP 3231 DI 10.1103/PhysRevLett.75.3226 PG 6 WC Physics, Multidisciplinary SC Physics GA TB559 UT WOS:A1995TB55900007 ER PT J AU STOEFFL, W DECMAN, DJ AF STOEFFL, W DECMAN, DJ TI ANOMALOUS STRUCTURE IN THE BETA-DECAY OF GASEOUS MOLECULAR TRITIUM SO PHYSICAL REVIEW LETTERS LA English DT Article ID NEUTRINO MASS; SPECTRUM; SPECTROSCOPY; LIMIT AB We have made high statistics measurements of tritium beta decay to set a limit on the mass of the election antineutrino. The measurements used a windowless gaseous source of molecular tritium and a high resolution toroidal field magnetic spectrometer. We calibrate the system using conversion electrons from the decay of Kr-83m. The best fit value for the neutrino mass squared is significantly negative. An anomalous structure in the beta decay spectrum in the last 55 eV closest to the end point causes this result. RP STOEFFL, W (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 11 TC 68 Z9 68 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 OCT 30 PY 1995 VL 75 IS 18 BP 3237 EP 3240 DI 10.1103/PhysRevLett.75.3237 PG 4 WC Physics, Multidisciplinary SC Physics GA TB559 UT WOS:A1995TB55900009 ER PT J AU SHUMLAK, U HARTMAN, CW AF SHUMLAK, U HARTMAN, CW TI SHEARED FLOW STABILIZATION OF THE M=1 KINK MODE IN Z-PINCHES SO PHYSICAL REVIEW LETTERS LA English DT Article AB The effect of a sheared axial flow on the m = 1 kink instability in Z pinches is studied numerically by reducing the linearized magnetohydrodynamic equations to a one-dimensional displacement equation. An equilibrium is used that is made marginally stable against the m = 0 sausage mode by tailoring its pressure profile. The principal result reveals that a sheared axial flow stabilizes the kink mode when the shear exceeds a threshold that is dependent on the location of the conducting wall. For the equilibria studied here the maximum threshold shear (v(z)(1)/kV(A)(0)) was about 0.1. C1 PHILLIPS LAB,DIV HIGH ENERGY PLASMA,KIRTLAND AFB,NM 87117. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. OI Shumlak, Uri/0000-0002-2918-5446 NR 13 TC 74 Z9 76 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 OCT 30 PY 1995 VL 75 IS 18 BP 3285 EP 3288 DI 10.1103/PhysRevLett.75.3285 PG 4 WC Physics, Multidisciplinary SC Physics GA TB559 UT WOS:A1995TB55900021 ER PT J AU RAUCH, EM MILLONAS, MM CHIALVO, DR AF RAUCH, EM MILLONAS, MM CHIALVO, DR TI PATTERN-FORMATION AND FUNCTIONALITY IN SWARM MODELS SO PHYSICS LETTERS A LA English DT Article ID SELF-ORGANIZED CRITICALITY AB We explore a simplified class of models we call swarms, which are inspired by the collective behavior of social insects. We perform a mean-field stability analysis and numerical simulations of the model. Several interesting types of behavior emerge in the vicinity of a second-order phase transition in the model, including the formation of stable lines of traffic flow, and memory reconstitution and bootstrapping. Tn addition to providing an understanding of certain classes of biological behavior, these models bear a generic resemblance to a number of pattern formation processes in the physical sciences. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. LOS ALAMOS NATL LAB, CNLS, LOS ALAMOS, NM 87545 USA. UNIV ARIZONA, DIV NEURAL SYST MEMORY & AGING, TUCSON, AZ 85724 USA. SANTA FE INST, FLUCTUAT & BIOPHYS GRP, SANTA FE, NM 87501 USA. RP RAUCH, EM (reprint author), YALE UNIV, POB 202200, NEW HAVEN, CT 06520 USA. RI Chialvo, Dante/A-4658-2009 OI Chialvo, Dante/0000-0002-1038-3637 NR 28 TC 60 Z9 60 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD OCT 30 PY 1995 VL 207 IS 3-4 BP 185 EP 193 DI 10.1016/0375-9601(95)00624-C PG 9 WC Physics, Multidisciplinary SC Physics GA TB859 UT WOS:A1995TB85900011 ER PT J AU ZHU, ZL ESPENSON, JH AF ZHU, ZL ESPENSON, JH TI METHYLRHENIUM TRIOXIDE AS A CATALYST FOR OXIDATIONS WITH MOLECULAR-OXYGEN AND FOR OXYGEN-TRANSFER SO JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL LA English DT Article DE CATALYSIS; PHOSPHINES; OXIDATION; RHENIUM; OXYGEN ID MAIN-GROUP ELEMENTS; ATOM TRANSFER-REACTIONS; TRANSITION-METALS; MULTIPLE BONDS; METHYLTRIOXORHENIUM; TRIPHENYLPHOSPHINE; COMPLEX; OXIDES AB Methylrhenium trioxide (MTO) was found to be a good catalyst for the oxidation of tertiary phosphines by molecular oxygen at room temperature. Evidence is given that an intermediate Re(V) compound - CH3ReO2, or the adduct CH3ReO2 . O=PPh(3)- is involved. The deoxygenation of epoxides, sulfoxides, N-oxides, triphenylarsine oxide and triphenylstibine oxide at room temperature was also catalyzed by MTO, with triphenylphosphine as the oxygen acceptor. A plausible reaction mechanism involves phosphine attack at a compound formed between MTO and the epoxide or other oxygen-donor compound. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 34 TC 73 Z9 73 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1381-1169 J9 J MOL CATAL A-CHEM JI J. Mol. Catal. A-Chem. PD OCT 28 PY 1995 VL 103 IS 2 BP 87 EP 94 DI 10.1016/1381-1169(95)00120-4 PG 8 WC Chemistry, Physical SC Chemistry GA TF389 UT WOS:A1995TF38900004 ER PT J AU SCHERER, JJ VOELKEL, D RAKESTRAW, DJ PAUL, JB COLLIER, CP SAYKALLY, RJ OKEEFE, A AF SCHERER, JJ VOELKEL, D RAKESTRAW, DJ PAUL, JB COLLIER, CP SAYKALLY, RJ OKEEFE, A TI INFRARED CAVITY RINGDOWN LASER-ABSORPTION SPECTROSCOPY (IR-CRLAS) SO CHEMICAL PHYSICS LETTERS LA English DT Article ID SPECTRUM AB We report the first extension of cavity ringdown laser absorption spectroscopy (CRLAS) into the infrared region. Spectra of static gas samples have been obtained employing a single mode Nd:YAG pumped optical parametric oscillator laser system and ate reported for two spectral regions centered around 1.6 and 3.3 mu m, respectively. We also explore the issue of the frequency specificity of the ringdown cavity. Specifically, we demonstrate the ability to extract accurate absorption intensities when the width of the spectral feature is much smaller than the free spectral range of the cavity, in direct contrast to recently published theoretical predictions. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LOS GATOS RES,MT VIEW,CA 94043. MAX PLANCK INST STROMUNGSFORSCH,W-3400 GOTTINGEN,GERMANY. RP SCHERER, JJ (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. RI Collier, Charles/C-9206-2016 OI Collier, Charles/0000-0002-8198-793X NR 20 TC 104 Z9 106 U1 1 U2 10 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 OCT 27 PY 1995 VL 245 IS 2-3 BP 273 EP 280 DI 10.1016/0009-2614(95)00969-B PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TB703 UT WOS:A1995TB70300021 ER PT J AU ASHBY, CIH HOWARD, AJ VAWTER, GA BRIGGS, RD HAFICH, MJ AF ASHBY, CIH HOWARD, AJ VAWTER, GA BRIGGS, RD HAFICH, MJ TI ETCHING PROCESSES FOR OPTOELECTRONIC DEVICES EMPLOYING PERIODIC MULTILAYERS OF INGAAS/INALAS SO ELECTRONICS LETTERS LA English DT Article DE GALLIUM INDIUM ARSENIDE; ETCHING; OPTOELECTRONIC DEVICES; REACTIVE ION ETCHING ID GAAS AB Nonselective reactive ion beam etching (RIBE) using Cl-2/Ar mixtures at elevated temperatures and two isotropic wet chemistries (HCl/HNO3/H2O2 and HCl/H2O2/H2O) have been developed for fabricating 1.3 mu m optical transmission modulators employing periodic multilayers of InGaAs/InAlAs. RP ASHBY, CIH (reprint author), SANDIA NATL LABS,POB 5800,MS 0603,ALBUQUERQUE,NM 87185, USA. NR 8 TC 6 Z9 6 U1 0 U2 2 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 OCT 26 PY 1995 VL 31 IS 22 BP 1948 EP 1950 DI 10.1049/el:19951292 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA TE339 UT WOS:A1995TE33900046 ER PT J AU REDDY, NRS JANKOWIAK, R SMALL, GJ AF REDDY, NRS JANKOWIAK, R SMALL, GJ TI HIGH-PRESSURE HOLE-BURNING STUDIES OF THE BACTERIOCHLOROPHYLL A ANTENNA COMPLEX FROM CHLOROBIUM-TEPIDUM SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PHOTOSYNTHETIC REACTION CENTERS; ENERGY-TRANSFER DYNAMICS; AMINO-ACID SEQUENCE; PROSTHECOCHLORIS-AESTUARII; RHODOBACTER-SPHAEROIDES; 3-DIMENSIONAL STRUCTURE; DISPERSIVE KINETICS; PHOTOCHEMICAL HOLES; MOLECULAR-SOLIDS; OPTICAL-SPECTRA AB The dependence of the low-temperature Q(y) absorption and nonphotochemical hole-burned spectra of the title complex (also known as the FMO complex) on pressure (less than or similar to 700 MPa) is reported. Pressure-induced structural changes of the complex were found to be elastic. The linear pressure shifts at 4.2 K for the principal absorption bands at 805, 814 and 825 nm are -0.08, -0.11, and -0.11 cm(-1)/MPa, respectively. Importantly, the 825 and 814 nm absorption profiles (shape, intensity) are independent of pressure. The results establish that, even at the highest values used, pressure has only a weak effect on the pairwise excitonic couplings of the bacteriochlorophyll (BChl) molecules, inhomogeneous broadening, and electron-phonon coupling. The pressure dependence of the Q, spectrum and zero-phonon holes (ZPH) burned in the 825 nm band can be rationalized in terms of dispersion interactions when BChl occupation numbers for the exciton levels are taken into account. These ZPH, which are assigned to the lowest level at 827 nm, carry a width of 0.6 cm(-1) at 4.2 K, which is independent of the pressure at which the hole is burned. This width is ascribed to dephasing, T-2 = 35 ps. Possible mechanisms for the dephasing are considered, and its pressure independence is discussed. Comparison of the Linear pressure shifts for the FMO complex against those of ether complexes suggests that pressure is a useful probe of strong coupling between BChl molecules. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 80 TC 31 Z9 31 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 OCT 26 PY 1995 VL 99 IS 43 BP 16168 EP 16178 DI 10.1021/j100043a070 PG 11 WC Chemistry, Physical SC Chemistry GA TD476 UT WOS:A1995TD47600070 ER PT J AU WIEDENBECK, M AF WIEDENBECK, M TI AN EXAMPLE OF REVERSE DISCORDANCE DURING ION MICROPROBE ZIRCON DATING - AN ARTIFACT OF ENHANCED ION YIELDS FROM A RADIOGENIC LABILE PB SO CHEMICAL GEOLOGY LA English DT Article ID U-PB; MURCHISON PROVINCE; WESTERN-AUSTRALIA; TH-PB; LEAD; AGE; EVOLUTION; GRAIN AB Sample #74459 contains Pb-204-rich Zircons which, when analyzed by ion microprobe, yield U/Pb ages that are exceptionally older than their Pb-207/Pb-206 ages. The 64 ion microprobe measurements define an age of 2681 +/- 6 Ma (1 sigma) for the zircons, with individual analyses giving U-238/Pb-206 ages reaching 7.2 Ga. In order to verify such low U/Pb ratios, isotope dilution analyses were conducted on 12 single,orains previously analyzed by SHRIMP: the IDTIMS measurements yielded radiogenic U-238/Pb-206 ratios between 2.0 and 8.5 whereas the 34 ion microprobe analyses on the same 12 grains gave systematically lower values between 0.6 and 2.5. The discrepancy between the SHRIMP and IDTIMS data has been traced to the labile Pb. By plotting the Pb-204 vs. Pb-206 concentrations observed by the ion microprobe, an unusually low Pb-204/Pb-206 ratio of similar to 0.02 has been defined for the labile component Apparently the secondary ion emission yield of the labile Pb was significantly greater than that of in situ radiogenic Pb, thereby invalidating SHRIMP's interelement calibration and leading to inaccurate U/Pb ages. These data provide important insights into the geochemistry of labile Pb; in #74459 the labile Pb was locally derived and was well mixed at the kilogram scale prior to becoming housed within the zircon grains. High-resolution TEM data suggest that the labile Pb is contained within amorphous microdomains which are intimately associated with crystalline zircon. Another feature of the labile Pb is its ubiquitous presence in the zircons whereas it was not taken up by the coexisting feldspar. This labile component has an age of similar to 0 Ma. RP WIEDENBECK, M (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 32 TC 38 Z9 41 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 J9 CHEM GEOL JI Chem. Geol. PD OCT 25 PY 1995 VL 125 IS 3-4 BP 197 EP 218 DI 10.1016/0009-2541(95)00072-T PG 22 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA TG097 UT WOS:A1995TG09700005 ER PT J AU BARNHART, DM CLARK, DL GORDON, JC HUFFMAN, JC WATKIN, JG ZWICK, BD AF BARNHART, DM CLARK, DL GORDON, JC HUFFMAN, JC WATKIN, JG ZWICK, BD TI SOLUTION STUDY OF THE AMBIENT-TEMPERATURE MONOMER-DIMER EQUILIBRIUM TH-2(OR)(8)REVERSIBLE-ARROW-2TH(OR)(4) (R=CH-I-PR-2) AND X-RAY CRYSTAL-STRUCTURES OF TH-2(OCH-I-PR-2)(8), TH(OCH-I-PR-2)(4)(QUIN), AND THI(OCH-I-PR-2)(3)(PY)(2) SO INORGANIC CHEMISTRY LA English DT Article ID TERT-BUTOXIDE COMPLEXES; METAL MULTIPLE BONDS; R = CME3; MOLECULAR-STRUCTURE; ALKOXIDE CHEMISTRY; CERIUM(III) ALKOXIDES; YTTRIUM; URANIUM; REACTIVITY; LANTHANIDES AB The thorium metallacycle [(Me(3)Si)(2)N]Th-2[N(SiMe(2))(SiMe(2)CH(2))] (1) reacts with 4 equiv of 2,4-dimethylpentan-3-ol (diisopropylmethanol) in toluene at room temperature to produce dimeric Th-2(OR)(8) (2) (R = CH-i-Pr-2). H-1 NMR spectra of 2 in noncoordinating solvents indicate a monomer-dimer equilibrium in solution at ambient temperatures between 2 and its monomer Th(OR)(4) (3). Thermodynamic parameters for the equilibrium process are Delta H degrees = 17 kcal mol(-1), Delta G degrees = 5 kcal mol(-1), Delta S degrees = 40 cal mol(-1) K-1. Addition of Lewis bases such as DME (DME = 1,2-dimethoxyethane), pyridine or quinuclidine to solutions of 2 results in the formation of the five- and six-coordinate mononuclear adducts Th(OR)(4)(DME) (4), Th(OR)(4)(py)(2) (5), and Th(OR)(4)(quin) (6), respectively. Reaction of 5 with 1 equiv of Me(3)SiI produces the monoiodide derivative TnI(OR)(3)(py)(2) (7). Compounds 2-7 have been characterized by H-1 NMR and IR spectroscopy, by elemental analysis, and, in the case of 2, 6, and 7, by single crystal X-ray diffraction studies. Th-2(OCH-i-Pr-2)(8) (2) exhibits a dimeric structure in which the Th2O8 core can be viewed as two ThO5 trigonal bipyramids joined along a common axial-equatorial edge. Terminal Th-O distances average 2.154(11) Angstrom while bridging Th-O distances are significantly longer at 2.436(11) Angstrom (average). Th(OCH-i-Pr-2)(4)(quin) (6) displays a trigonal bipyramidal geometry with the quinuclidine ligand occupying an axial site. Th-O distances average 2.165(17) Angstrom while the Th-N distance is 2.712(11) Angstrom. ThI(OCH-i-Pr-2)(3)(py)(2) (7) exhibits a facial pseudooctahedral geometry in the solid state, with Th-O and Th-N distances averaging 2.136(8) and 2.746(9) Angstrom, respectively, and a Th-I distance of 3.226(1) Angstrom. Crystal data for 2 at -170 degrees C: monoclinic space group P2(1)/n, a = 12.115(2) Angstrom, b = 20.820(3) Angstrom, c = 13.002(2) Angstrom, beta = 100.62(1)degrees, V = 3223.4 Angstrom(3), d(calcd) = 1.428 g cm(-3), Z = 2. Crystal data for 6 at -70 degrees C: monoclinic space group Cc, a = 18.778(3) Angstrom, b = 11.391(2) Angstrom, c = 20.538(3) Angstrom, beta = 123.51(2)degrees, V = 4028.4 Angstrom(3), d(calcd) = 1.356 g cm(-3), Z = 4. Crystal data for 7 at -70 (d)egrees C: triclinic space group P ($) over bar 1, a = 9.691(2) Angstrom, b = 11.739(2) Angstrom, c = 17.006(3) Angstrom, alpha = 77.63(3)degrees, beta = 75.34(3)degrees, gamma = 72.41(2)degrees, V = 1764.1 Angstrom(3), d(calcd) = 1.624 g cm(-3), Z = 2. C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. INDIANA UNIV,CTR MOLEC STRUCT,BLOOMINGTON,IN 47405. RI Clark, David/A-9729-2011 NR 82 TC 19 Z9 19 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD OCT 25 PY 1995 VL 34 IS 22 BP 5416 EP 5423 DI 10.1021/ic00126a008 PG 8 WC Chemistry, Inorganic & Nuclear SC Chemistry GA TC630 UT WOS:A1995TC63000008 ER PT J AU BUTCHER, RJ CLARK, DL GRUMBINE, SK VINCENTHOLLIS, RL SCOTT, BL WATKIN, JG AF BUTCHER, RJ CLARK, DL GRUMBINE, SK VINCENTHOLLIS, RL SCOTT, BL WATKIN, JG TI AMMONIACAL SYNTHESIS OF LANTHANUM ARYLOXIDE COMPLEXES AND OBSERVATION OF A UNIQUE INTERCONVERSION BETWEEN OXYGEN-BRIDGED AND ETA-ARENE-BRIDGED DIMERIC SPECIES - X-RAY CRYSTAL-STRUCTURES OF LA-2(OAR)(6)(NH3)(N) (N=0, 2), LA(OAR)(3)(NH3)(4), AND LA(OAR)(3)(THF)(2) (AR=2,6-I-PR2C6H3) SO INORGANIC CHEMISTRY LA English DT Article ID THF = TETRAHYDROFURAN; MOLECULAR-STRUCTURE; ETHEREAL SOLVENTS; BARIUM; ALKOXIDE; LIGANDS; CHEMISTRY; SILOXIDE; CALCIUM; BASE AB Reaction of LaCl3 with 3 equiv of sodium metal in liquid ammonia at -78 degrees C, followed by addition of 3 equiv of HOAr (Ar=2,6-i-Pr2C6H3) in toluene produces La(OAr)(3)(NH3)(x) (1) after warming to room temperature. Dissolution of 1 in toluene followed by 6 h reflux provides La-2(OAr)(6) (2) in good yield. An X-ray crystallographic study revealed that 2 contains a dimeric unit held together with two eta(6)-arene bridges formed from aryloxide ligands with La-C(av)=3.062(10) Angstrom. The La-O distances average 2.193(5) and 2.273(5) Angstrom for terminal and bridging aryloxide ligands, respectively. Dissolution of 1 in toluene followed by vacuum filtration and crystallization from toluene without reflux yields La-2(OAr)(6)(NH3)(2)(3) in high yield. The X-ray crystal structure of 3 reveals an alternate dimeric structure bridged by oxygen atoms of the aryloxide ligands. X-ray crystallography has shown that a third compound may be isolated by gravity filtration and crystallization of 1 to produce La(OAr)(3)(NH3)(4) (4) 4 displays a capped pseudo-octahedral geometry around the metal center with facial aryloxide and NH3 ligands. A fourth NH3 ligand caps the face defined by the other three. La-O distances for the aryloxide ligands average 2.252(6) Angstrom. The La-N distances for the NH3 ligands average 2.750(9) Angstrom with no significant lengthening of the capped La-N bond. The monomeric five- and six-coordinate Lewis base adducts, La(OAr)(3)(THF)(2) (5) and La(OAr)(3)(py)(3) (6) (py = pyridine), are prepared by reaction of 2 with an excess of the appropriate Lewis base. An X-ray crystal structure for 5 displays a distorted trigonal bipyramidal La metal center with two axial THF and three equatorial aryloxide ligands. La-O distances for aryloxide ligands average 2.21(1) Angstrom while La-O distances for the THF ligands average 2.52(1) Angstrom, Crystal data for 2 (-70 degrees C): monoclinic space group P2(1)/c, a=17.550(4) Angstrom, b=10.225(2) Angstrom, c=21.837(4) Angstrom, beta=111.57(3)degrees, V=3644.2 Angstrom(3), Z=2, d(calc)=1.310 g cm(-3), R(F)=0.0394, R(W)(F)=0.0447. Crystal data for 4 (-100 degrees C): trigonal space group R ($) over bar 3, a=14.220(2) Angstrom, c=32.821(4) Angstrom, V=5748.8 Angstrom(3), Z=6, d(calc)=1.259 g Crystal data for 5 (-70 degrees C): monoclinic space group P2(1), a=9.870(2) Angstrom, b=19.367(4) Angstrom, c=12.128(2) Angstrom, beta=109.88(3)degrees, V=2180.1 Angstrom(3), Z=2, d(calc)=1.241 g cm(-3), R(F)=0.0.449, R(W)(F)=0.0583. C1 LOS ALAMOS NATL LAB,DEPT CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 53 TC 45 Z9 45 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 OCT 25 PY 1995 VL 34 IS 22 BP 5468 EP 5476 DI 10.1021/ic00126a016 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA TC630 UT WOS:A1995TC63000016 ER PT J AU WANG, HH SCHLUETER, JA GEISER, U WILLIAMS, JM NAUMANN, D ROY, T AF WANG, HH SCHLUETER, JA GEISER, U WILLIAMS, JM NAUMANN, D ROY, T TI ESR CHARACTERIZATION OF THE ORGANIC SUPERCONDUCTING SALTS OF THE BEDT-TTF DONOR MOLECULE WITH THE NOVEL ORGANOMETALLIC ANION [CU(CF3)(4)](-) [BEDT-TTF=BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE] SO INORGANIC CHEMISTRY LA English DT Article ID ELECTRON-SPIN-RESONANCE; AMBIENT-PRESSURE; ALPHA-PHASE; CONDUCTOR; CRYSTALS; STATE AB Two new organic superconductors and a semiconductor were the subject of angular- and temperature-dependent ESR (electron spin resonance) studies. The low-T-c (4.0 K) K-L-(ET)(2)Cu(CF3)(4)(TCE) phase gave room-temperature line widths and g values between 68 (Delta H-parallel to) and 54 (Delta H-perpendicular to) G and between 2.0052 (g(parallel to)) and 2.0097 (g(perpendicular to)), respectively. Its low-temperature behavior can be qualitatively correlated to four-probe resistivity measurements and described with the use of Elliott's formula. The high-T-c (9.2 K) K-H-(ET)(2)Cu(CF3)(4)(TCE) phase gave a narrow line width range of 6.2 (Delta H-parallel to) to 5.8 (Delta H-perpendicular to) G and corresponding g values of 2.0081 (g(parallel to)) to 2.0105 (g(perpendicular to)), respectively. The solvent-free semiconductor (ET)(2)Cu(CF3)(4) revealed a characteristic line width between 30 and 40 G, thus providing a facile characterization of the three ET/Cu(CF3)(4)(-) phases based on their ESR peak-to-peak line widths. X-ray studies on the semiconductor indicated a similar unit cell compared to the previously reported alpha-(ET)(2)Ag(CF3)(4) phase. Superconducting K-L- and K-H-(ET)(2)CU(CF3)(4)(TCE) crystals lost their cocrystallized solvent, TCE, at 340 and 380 K, respectively, and were converted to semiconducting (ET)(2)Cu(CF3)(4), indicating the close relationship among these three compounds. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV COLOGNE,INST ANORGAN CHEM,D-50939 COLOGNE,GERMANY. RP WANG, HH (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 33 TC 15 Z9 15 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD OCT 25 PY 1995 VL 34 IS 22 BP 5552 EP 5557 DI 10.1021/ic00126a027 PG 6 WC Chemistry, Inorganic & Nuclear SC Chemistry GA TC630 UT WOS:A1995TC63000027 ER PT J AU METCALF, DH DAI, S DELCUL, GD TOTH, LM AF METCALF, DH DAI, S DELCUL, GD TOTH, LM TI LUMINESCENCE SPECTRA OF SINGLE-CRYSTALS OF CS2ZRCL6-UO2CL42- AT LOW-TEMPERATURES - VIBRONIC STRUCTURE OF UO22+ DOPED IN A CUBIC HOST SO INORGANIC CHEMISTRY LA English DT Article ID ELECTRONIC-STRUCTURE; CS2UO2CL4; SPECTROSCOPY; MODEL AB Low-temperature (20 K-120 K) high-resolution luminescence spectra of UO2Cl42- doped in cubic crystals of Cs2ZrCl6 are reported. The luminescence is associated with the A(1g) <-- E(g) electronic origin transition and vibronic transitions associated with this origin. The vibronic structure is consistent with the UO2Cl42- ion having D-4h symmetry. The distribution of intensity among members of vibronic progressions associated with the UO22+ stretching frequency was used to determine Huang-Rhys parameters for both the ground (A(1g)) and excited (Eg) states. The parameters are consistent with a difference of U-O bond length of ca. 7 pm between the ground and excited states. The energy of the electronic origin transition is less than that of the neat Cs2UO2Cl4 crystal [Denning, R. G.; Snellgrove, T. R.; Woodwark, D. R. Mol. Phys. 1976, 32, 419-442] by some 400 cm(-1). This is explained by structural and Coulombic effects on the UO2Cl42- ion as it is accommodated in the Cs2ZrCl6 lattice. RP METCALF, DH (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 18 TC 22 Z9 22 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD OCT 25 PY 1995 VL 34 IS 22 BP 5573 EP 5577 DI 10.1021/ic00126a030 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA TC630 UT WOS:A1995TC63000030 ER PT J AU HOLMES, RL GROVE, JW SHARP, DH AF HOLMES, RL GROVE, JW SHARP, DH TI NUMERICAL INVESTIGATION OF RICHTMYER-MESHKOV INSTABILITY USING FRONT TRACKING SO JOURNAL OF FLUID MECHANICS LA English DT Article AB Front tracking simulations of the Richtmyer-Meshkov instability produce significantly better agreement with experimentally measured growth rates than obtained in nontracking computations. Careful analysis of the early stages of the shock acceleration process show that nonlinearity and compressibility play a critical role in the behaviour of the shocked interface and are responsible for the deviations from the linear theories. The late-time behaviour of the interface growth rate is compared to a nonlinear potential flow model of Hecht et al. C1 SUNY STONY BROOK,DEPT APPL MATH & STAT,STONY BROOK,NY 11794. LOS ALAMOS NATL LAB,DIV THEORET,COMPLEX SYST GRP,LOS ALAMOS,NM 87545. NR 18 TC 61 Z9 72 U1 1 U2 5 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 OCT 25 PY 1995 VL 301 BP 51 EP 64 DI 10.1017/S002211209500379X PG 14 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA TD928 UT WOS:A1995TD92800004 ER PT J AU DIKANOV, SA SAMOILOVA, RI SMIEJA, JA BOWMAN, MK AF DIKANOV, SA SAMOILOVA, RI SMIEJA, JA BOWMAN, MK TI 2-DIMENSIONAL ESEEM STUDY OF VO2+ COMPLEXES WITH IMIDAZOLE AND HISTIDINE - HISTIDINE IS A POLYDENTANTE LIGAND SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID ECHO ENVELOPE MODULATION; SPIN; SPECTROSCOPY; COORDINATION; APOFERRITIN; NITROGEN; HYSCORE; ENDOR C1 RUSSIAN ACAD SCI, INST CHEM KINET & COMBUST, NOVOSIBIRSK 630090, RUSSIA. GONZAGA UNIV, DEPT CHEM, SPOKANE, WA 99258 USA. RP PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, MACROMOLEC STRUCT & DYNAM, RICHLAND, WA 99352 USA. RI Bowman, Michael/F-4265-2011 OI Bowman, Michael/0000-0003-3464-9409 NR 26 TC 42 Z9 43 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD OCT 25 PY 1995 VL 117 IS 42 BP 10579 EP 10580 DI 10.1021/ja00147a023 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA TC326 UT WOS:A1995TC32600023 ER PT J AU ESCOUBAS, JM LOMAS, M LAROCHE, J FALKOWSKI, PG AF ESCOUBAS, JM LOMAS, M LAROCHE, J FALKOWSKI, PG TI LIGHT-INTENSITY REGULATION OF CAB GENE-TRANSCRIPTION IS SIGNALED BY THE REDOX STATE OF THE PLASTOQUINONE POOL SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE ALGAE; PHOSPHORYLATION; PHOTOACCLIMATION ID CHLOROPHYTE DUNALIELLA-TERTIOLECTA; PHOTOSYSTEM-II; PHOTOSYNTHETIC APPARATUS; PROTEIN-PHOSPHORYLATION; THYLAKOID MEMBRANES; MARINE CHLOROPHYTE; HIGHER-PLANTS; BINDING-SITE; IRRADIANCE; ADAPTATION AB The eukaryotic green alga Dunaliella tertiolecta acclimates to decreased growth irradiance by increasing cellular levels of light-harvesting chlorophyll protein complex apoproteins associated with photosystem II (LHCIIs), whereas increased growth irradiance elicits the opposite response. Nuclear run-on transcription assays and measurements of cab mRNA stability established that light intensity-dependent changes in LHCII are controlled at the level of transcription, cab gene transcription in high-intensity light was partially enhanced by reducing plastoquinone with 3-(3,4-dichlorophenyl)-1,1-dimethyl urea (DCMU), whereas it was repressed in low-intensity light by partially inhibiting the oxidation of plastoquinol with 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB). Uncouplers of photosynthetic electron transport and inhibition of water splitting had no effect on LHCII levels. These results strongly implicate the redox state of the plastoquinone pool in the chloroplast as a photon-sensing system that is coupled to the light-intensity regulation of nuclear-encoded cab gene transcription. The accumulation of cellular chlorophyll at low-intensity light can be blocked with cytoplasmically directed phosphatase inhibitors, such as okadaic acid, microcystin L-R, and tautomycin. Gel mobility-shift assays revealed that cells grown in high-intensity light contained proteins that bind to the promoter region of a cab gene carrying sequences homologous to higher plant light-responsive elements. On the basis of these experimental results, we propose a model for a light intensity signaling system where cab gene expression is reversibly repressed by a phosphorylated factor coupled to the redox status of plastoquinone through a chloroplast protein kinase. C1 BROOKHAVEN NATL LAB,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973. SOUTHAMPTON COLL,SOUTHAMPTON,NY 11968. RI ESCOUBAS, Jean-Michel/G-4027-2010; LaRoche, Julie/A-1109-2010; OI Lomas, Michael/0000-0003-1209-3753 NR 54 TC 465 Z9 487 U1 4 U2 40 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 OCT 24 PY 1995 VL 92 IS 22 BP 10237 EP 10241 DI 10.1073/pnas.92.22.10237 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TB467 UT WOS:A1995TB46700062 PM 7479759 ER PT J AU ROULEAU, CM LOWNDES, DH MCCAMY, JW BUDAI, JD POKER, DB GEOHEGAN, DB PURETZKY, AA ZHU, S AF ROULEAU, CM LOWNDES, DH MCCAMY, JW BUDAI, JD POKER, DB GEOHEGAN, DB PURETZKY, AA ZHU, S TI GROWTH OF HIGHLY DOPED P-TYPE ZNTE FILMS BY PULSED-LASER ABLATION IN MOLECULAR NITROGEN SO APPLIED PHYSICS LETTERS LA English DT Article ID ZNSE; EPITAXY; BLUE AB Highly N-doped (mid-10(19) to >10(20) cm(-3)) ZnTe/(001)GaAs epitaxial films have been grown by pulsed laser ablation (PLA) of a stoichiometric ZnTe target in a high-purity N-2 ambient (50 to 200 mTorr) without the use of any assisting de or ac plasma source. Unlike recent experiments in which atomic N, extracted from de and rf plasma sources, was used to produce N-doping during molecular beam epitaxy, spectroscopic measurements performed during PLA of ZnTe in N-2 do not reveal the presence of atomic N. This suggests that the high hole concentrations in laser ablated ZnTe are produced by a new mechanism, possibly energetic beam-induced reactions with excited N-2 adsorbed on the film surface, and/or transient formation of Zn-N complexes in the energetic ablation plume. (C) 1995 American Institute of Physics. C1 HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138. RUSSIAN ACAD SCI,INST SPECT,TROITSK 142092,RUSSIA. RP ROULEAU, CM (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,MS 6056,OAK RIDGE,TN 37831, USA. RI Rouleau, Christopher/Q-2737-2015; Puretzky, Alexander/B-5567-2016; Geohegan, David/D-3599-2013; Budai, John/R-9276-2016 OI Rouleau, Christopher/0000-0002-5488-3537; Puretzky, Alexander/0000-0002-9996-4429; Geohegan, David/0000-0003-0273-3139; Budai, John/0000-0002-7444-1306 NR 16 TC 25 Z9 25 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 OCT 23 PY 1995 VL 67 IS 17 BP 2545 EP 2547 DI 10.1063/1.114453 PG 3 WC Physics, Applied SC Physics GA TA581 UT WOS:A1995TA58100040 ER PT J AU GOYAL, A SPECHT, ED KROEGER, DM TKACYZK, JE BRIANT, CL DELUCA, JA AF GOYAL, A SPECHT, ED KROEGER, DM TKACYZK, JE BRIANT, CL DELUCA, JA TI CRYSTALLIZATION OF COLONIES OF LOCALLY ALIGNED GRAINS DURING THALLINATION OF SPRAY-PYROLYZED TLBA2CA2CU3OX THICK-FILMS SO APPLIED PHYSICS LETTERS LA English DT Article AB Recent microstructural studies of high-J(c), Tl-1223, spray-pyrolyzed thick films have shown that the high-J, and reduced weak-link behavior can be ascribed to the presence of a unique microstructure, wherein the film is divided into ''colonies'' of biaxially aligned regions. In an effort to understand the nucleation and growth of Tl-1223 as well as the formation of the colony microstructure, several sets of films quenched from various stages of the high-temperature thallination process were examined using electron microscopy, x-ray diffraction and electron backscatter diffraction (EBSD). It is found that the crystallization of the 1223 phase is associated with formation of a liquid phase which contains significant amounts of all oxides. Furthermore, it is found that the film nucleates at the substrate on the side closest to the thallium source. The growth front then moves up through the thickness and along the length of the film. X-ray microdiffraction measurements show that local biaxial alignment or the formation of colonies starts to occur at the onset of 1223 crystallization. (C) 1995 American Institute of Physics. C1 GE CO,CORP RES & DEV,SCHENECTADY,NY 12345. RP GOYAL, A (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,MS 6116,OAK RIDGE,TN 37831, USA. RI Specht, Eliot/A-5654-2009 OI Specht, Eliot/0000-0002-3191-2163 NR 8 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 OCT 23 PY 1995 VL 67 IS 17 BP 2563 EP 2565 DI 10.1063/1.114433 PG 3 WC Physics, Applied SC Physics GA TA581 UT WOS:A1995TA58100046 ER PT J AU FINNELL, D POULIOT, P AF FINNELL, D POULIOT, P TI INSTANTON CALCULATIONS VERSUS EXACT RESULTS IN 4-DIMENSIONAL SUSY GAUGE-THEORIES SO NUCLEAR PHYSICS B LA English DT Article ID DYNAMICAL SUPERSYMMETRY BREAKING; REGULARIZATION; QCD; DEPENDENCE; CALCULUS; SQCD AB We relate the non-perturbative exact results in supersymmetry to perturbation theory using several different methods: instanton calculations at weak or strong coupling, a method using gaugino condensation and another method relating strong and weak coupling. This allows many precise numerical checks of the consistency of these methods, especially the amplitude of instanton effects, and of the network of exact solutions in supersymmetry. However, there remain difficulties with the instanton computations at strong coupling. C1 RUTGERS STATE UNIV,DEPT PHYS & ASTRON,PISCATAWAY,NJ 08855. RP FINNELL, D (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 42 TC 131 Z9 131 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 OCT 23 PY 1995 VL 453 IS 1-2 BP 225 EP 239 DI 10.1016/0550-3213(95)00318-M PG 15 WC Physics, Particles & Fields SC Physics GA TA760 UT WOS:A1995TA76000010 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 BYONWANER, 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 DELLAGNELLO, 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 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, B 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 KONIOSBERG, 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 MUKERJEE, 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 PAPPAS, SP 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 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, S VEJCIK, S VIDAL, R VONDRACEK, M VUCINIC, D WAGNER, RG WAGNER, RK 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, 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 BYONWANER, 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 DELLAGNELLO, 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 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, B 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 KONIOSBERG, 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 MUKERJEE, 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 PAPPAS, SP 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 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, S VEJCIK, S VIDAL, R VONDRACEK, M VUCINIC, D WAGNER, RG WAGNER, RK 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, W ZUCCHELLI, S TI MEASUREMENT OF THE POLARIZATION IN THE DECAYS B-D-]J/PSI-K-(ASTERISK-0) AND BS-]J/PSI-PHI SO PHYSICAL REVIEW LETTERS LA English DT Article ID CP ASYMMETRIES; MESONS AB This Letter reports on measurements of the longitudinal polarization fractions in the decays B-d --> J/psi K*(0) and B-s --> J/psi phi using data collected with the Collider Detector at Fermilab. B-d mesons are reconstructed through the decay chain B-d --> J/psi K*(0), J/psi --> mu(+)mu(-), K*(0) --> K(+)phi(-). A sample of 65 +/- 10 B-d events is used to obtain a longitudinal polarization fraction of T-L/Gamma = 0.65 +/- 0.10(stat) +/- 0.04(syst). B-s mesons are reconstructed through the decay chain B-s --> J/psi phi, J/psi --> mu(+)mu(-), phi --> K+K-. A sample of 19 +/- 5 B-s events is used to obtain the result Gamma(L)/Gamma = 0.56 +/- 0.21(stat)-(+0.02)(0.04)(syst). 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. 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 PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15260. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. 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 OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787 NR 18 TC 27 Z9 27 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 OCT 23 PY 1995 VL 75 IS 17 BP 3068 EP 3072 DI 10.1103/PhysRevLett.75.3068 PG 5 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100011 ER PT J AU BRAVAR, A ADAMS, DL AKCHURIN, N BELIKOV, NI BONNER, BE BYSTRICKY, J CORCORAN, MD COSSAIRT, JD CRANSHAW, J DEREVSCHIKOV, AA ENYO, H FUNAHASHI, H GOTO, Y GRACHOV, OA GROSNICK, DP HILL, DA IIJIMA, T IMAI, K ITOW, Y IWATANI, K KRUEGER, K KURODA, K LAGHAI, M LANGLAND, JL LEHAR, F DELESQUEN, A LOPIANO, D LUEHRING, FC MAKI, T MAKINO, T MAKINO, S MASAIKE, A MATULENKO, YA MESCHANIN, AP MICHALOWICZ, A MILLER, DH MIYAKE, K NAGAMINE, T NESSITEDALDI, F NESSI, M NGUYEN, C NURUSHEV, SB OHASHI, Y ONEL, Y PATALAKHA, DI PAULETTA, G PENZO, A RAPPAZZO, GF READ, AL ROBERTS, JB VANROSSUM, L RYKOV, VL SAITO, N SALVATO, G SCHIAVON, P SKEENS, J SOLOVYANOV, VL SPINKA, H STANEK, RW TAKASHIMA, T TAKEUTCHI, F UNDERWOOD, DG VASILIEV, AN WHITE, JL YAMASHITA, S YOKOSAWA, A YOSHIDA, T ZANETTI, A AF BRAVAR, A ADAMS, DL AKCHURIN, N BELIKOV, NI BONNER, BE BYSTRICKY, J CORCORAN, MD COSSAIRT, JD CRANSHAW, J DEREVSCHIKOV, AA ENYO, H FUNAHASHI, H GOTO, Y GRACHOV, OA GROSNICK, DP HILL, DA IIJIMA, T IMAI, K ITOW, Y IWATANI, K KRUEGER, K KURODA, K LAGHAI, M LANGLAND, JL LEHAR, F DELESQUEN, A LOPIANO, D LUEHRING, FC MAKI, T MAKINO, T MAKINO, S MASAIKE, A MATULENKO, YA MESCHANIN, AP MICHALOWICZ, A MILLER, DH MIYAKE, K NAGAMINE, T NESSITEDALDI, F NESSI, M NGUYEN, C NURUSHEV, SB OHASHI, Y ONEL, Y PATALAKHA, DI PAULETTA, G PENZO, A RAPPAZZO, GF READ, AL ROBERTS, JB VANROSSUM, L RYKOV, VL SAITO, N SALVATO, G SCHIAVON, P SKEENS, J SOLOVYANOV, VL SPINKA, H STANEK, RW TAKASHIMA, T TAKEUTCHI, F UNDERWOOD, DG VASILIEV, AN WHITE, JL YAMASHITA, S YOKOSAWA, A YOSHIDA, T ZANETTI, A TI ANALYZING POWER MEASUREMENT IN INCLUSIVE LAMBDA(0) PRODUCTION WITH A 200 GEV/C POLARIZED PROTON-BEAM SO PHYSICAL REVIEW LETTERS LA English DT Article ID HYPERON POLARIZATION; HADRON-PRODUCTION; HIGH-ENERGIES; 18.5 GEV/C; ASYMMETRY; MODEL AB The considerable polarization of hyperons produced at high x(F) has been known for a long time and has been interpreted with various theoretical models in terms of the constituents' spin. Recently, the analyzing power in inclusive Lambda(0) hyperon production has also been measured using the 200 GeV/c Fermilab polarized proton beam. The covered kinematic range is 0.2 less than or equal to x(F) less than or equal to 1.0 and 0.1 less than or equal to p(T) less than or equal to 1.5 GeV/c. The data indicate a negative asymmetry at large x(F) and moderate p(T). These results can further test the current ideas on the underlying mechanisms for hyperon polarization. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. CTR ETUD SACLAY,DAPNIA,SERV PHYS PARTICULES,CEA,F-91191 GIF SUR YVETTE,FRANCE. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. FT HAYS STATE UNIV,DEPT PHYS,HAYS,KS 67601. HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN. UNIV IOWA,DEPT PHYS,IOWA CITY,IA 52242. INST HIGH ENERGY PHYS,PROTVINO 142284,RUSSIA. UNIV OCCUPAT & ENVIRONM HLTH,KITAKYUSHU,FUKUOKA 807,JAPAN. KYOTO UNIV,DEPT PHYS,KYOTO 603,JAPAN. KYOTO UNIV,KYOTO 612,JAPAN. KYOTO SANGYO UNIV,KYOTO 612,JAPAN. PHYS PARTICULES LAB,F-74017 ANNECY LE VIEUX,FRANCE. UNIV MESSINA,DIPARTIMENTO FIS,I-98100 MESSINA,ITALY. GRP COLL IST NAZL FIS NUCL MESSINA,I-98100 MESSINA,ITALY. NORTHWESTERN UNIV,DEPT PHYS,EVANSTON,IL 60201. OSAKA CITY UNIV,OSAKA 558,JAPAN. RICE UNIV,TW BONNER NUCL LAB,HOUSTON,TX 77251. UNIV TRIESTE,DIPARTIMENTO FIS,I-34100 TRIESTE,ITALY. SEZ IST NAZL FIS NUCL TRIESTE,I-34100 TRIESTE,ITALY. UNIV UDINE,I-33100 UDINE,ITALY. GRP COLL IST NAZL FIS NUCL UDINE,I-33100 UDINE,ITALY. NR 20 TC 38 Z9 38 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 OCT 23 PY 1995 VL 75 IS 17 BP 3073 EP 3077 DI 10.1103/PhysRevLett.75.3073 PG 5 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100012 ER PT J AU BEAVIS, D BENNETT, MJ CARROLL, JB CHIBA, J CHIKANIAN, A CRAWFORD, H CRONQVIST, M DARDENNE, Y DEBBE, R DOKE, T ENGELAGE, J GREINER, L HALLMAN, TJ HAYANO, RS HECKMAN, HH KASHIWAGI, T KIKUCHI, J KUMAR, S KUO, C LINDSTROM, PJ MITCHELL, JW NAGAMIYA, S NAGLE, JL POPE, JK STANKUS, P TANAKA, KH WELSH, RC ZHAN, W AF BEAVIS, D BENNETT, MJ CARROLL, JB CHIBA, J CHIKANIAN, A CRAWFORD, H CRONQVIST, M DARDENNE, Y DEBBE, R DOKE, T ENGELAGE, J GREINER, L HALLMAN, TJ HAYANO, RS HECKMAN, HH KASHIWAGI, T KIKUCHI, J KUMAR, S KUO, C LINDSTROM, PJ MITCHELL, JW NAGAMIYA, S NAGLE, JL POPE, JK STANKUS, P TANAKA, KH WELSH, RC ZHAN, W TI SEARCH FOR NEW METASTABLE PARTICLES PRODUCED IN AU+AU COLLISIONS AT 10.8A GEV/C SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRANGE-QUARK-MATTER; HEAVY-ION COLLISIONS; DROPLETS; SEPARATION; MASS AB We have investigated particle production using a zero degree two-segment focusing beam-line spectrometer, examining 2 x 10(12) Au + Au interactions at a beam momentum of 10.8A GeV/c. We have measured invariant cross sections for protons, various light nuclei (through A = 6), antiprotons, and have set upper limits on the production of heavier nuclei, antideuterons, and strangelets. There is no evidence, within the sensitivity of our measurements, for the formation of new particles having lifetimes >100 ns. C1 YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06511. UNIV CALIF LOS ANGELES,LOS ANGELES,CA. KEK,TSUKUBA,IBARAKI,JAPAN. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. WASEDA UNIV,TOKYO,JAPAN. UNIV TOKYO,TOKYO,JAPAN. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. UNIV SPACE RES ASSOC,GSFC,GREENBELT,MD. COLUMBIA UNIV,NEVIS LAB,IRVINGTON,NY 10533. JOHNS HOPKINS UNIV,BALTIMORE,MD. RP BEAVIS, D (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Hayano, Ryugo/F-7889-2012; Kuo, Chaincy/H-9475-2016 OI Hayano, Ryugo/0000-0002-1214-7806; Kuo, Chaincy/0000-0001-7958-8764 NR 27 TC 35 Z9 35 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 OCT 23 PY 1995 VL 75 IS 17 BP 3078 EP 3081 DI 10.1103/PhysRevLett.75.3078 PG 4 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100013 ER PT J AU SMITH, BH PAN, XW FENG, DH GUIDRY, M AF SMITH, BH PAN, XW FENG, DH GUIDRY, M TI UNIVERSALITY OF SYMMETRY AND MIXED-SYMMETRY COLLECTIVE NUCLEAR-STATES SO PHYSICAL REVIEW LETTERS LA English DT Article ID MODEL; DEFORMATION AB The global correlation in the observed variation with mass number of the E2 and summed M1 transition strengths is examined for rare-earth nuclei. It is shown that a theory of correlated S and D fermion pairs with a simple pairing plus quadrupole interaction leads naturally to this universality. Thus a unified and quantitative description emerges for low-lying quadrupole and dipole strengths. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP SMITH, BH (reprint author), DREXEL UNIV,DEPT PHYS,PHILADELPHIA,PA 19104, USA. NR 26 TC 12 Z9 12 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 OCT 23 PY 1995 VL 75 IS 17 BP 3086 EP 3089 DI 10.1103/PhysRevLett.75.3086 PG 4 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100015 ER PT J AU DITMIRE, T DONNELLY, T FALCONE, RW PERRY, MD AF DITMIRE, T DONNELLY, T FALCONE, RW PERRY, MD TI STRONG X-RAY-EMISSION FROM HIGH-TEMPERATURE PLASMAS PRODUCED BY INTENSE IRRADIATION OF CLUSTERS SO PHYSICAL REVIEW LETTERS LA English DT Article ID FIELD-INDUCED IONIZATION; LASER-PULSES; AMPLIFICATION; DENSITY; GAS AB The interaction of an intense laser pulse with large (similar to 100 Angstrom) clusters present in pulsed gas jets is shown to produce novel plasmas with electron temperatures far in excess of that predicted by above-threshold ionization theory. The enhanced absorption of the laser light by the dense clusters results in the production of high ion charge states via collisional ionization resulting in strong x-ray emission from the hot plasma. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP DITMIRE, T (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-443,LIVERMORE,CA 94550, USA. NR 21 TC 236 Z9 240 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 OCT 23 PY 1995 VL 75 IS 17 BP 3122 EP 3125 DI 10.1103/PhysRevLett.75.3122 PG 4 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100024 ER PT J AU WOLVERTON, C ZUNGER, A AF WOLVERTON, C ZUNGER, A TI ISING-LIKE DESCRIPTION OF STRUCTURALLY RELEASED ORDERED AND DISORDERED ALLOYS SO PHYSICAL REVIEW LETTERS LA English DT Article ID SYSTEMS AB We demonstrate the ability of generalized Ising-like cluster expansions to describe the energetics and thermodynamics associated with large atomic displacements in alloys. Although the expansion is constructed only from the energies of a few (small-unit-cell) ordered structures, it provides accurate predictions of the atomically relaxed energies of random, ordered, or partially ordered alloys, as compared with direct, large scale energy-minimizing simulations. Relaxed energies are obtained without having to compute relaxed geometries. Combination of the expansion with Monte Carlo simulations is shown to provide an efficient means for calculating thermodynamic properties. RP WOLVERTON, C (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Wolverton, Christopher/B-7542-2009; Zunger, Alex/A-6733-2013 NR 14 TC 51 Z9 51 U1 2 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD OCT 23 PY 1995 VL 75 IS 17 BP 3162 EP 3165 DI 10.1103/PhysRevLett.75.3162 PG 4 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100034 ER PT J AU EVERITT, BA SALAMON, MB PARK, BJ FLYNN, CP THURSTON, T GIBBS, D AF EVERITT, BA SALAMON, MB PARK, BJ FLYNN, CP THURSTON, T GIBBS, D TI X-RAY MAGNETIC SCATTERING FROM NONMAGNETIC LU IN A DYLU ALLOY SO PHYSICAL REVIEW LETTERS LA English DT Article ID RESONANCE EXCHANGE SCATTERING; POLARIZATION AB We have detected the presence of a spin-density wave (SDW) induced in the conduction band of a Dy0.60Lu0.40 thin film alloy that orders as a c-axis helimagnet. By tuning the incident x-ray energy to the L(III) edges, we exploit the species sensitivity of x-ray resonant magnetic scattering to isolate the contribution of each element individually. As Lu has a filled 4f shell, magnetic intensity observed at that resonance reflects the polarization of the 5d orbitals in the helical SDW. The SDW amplitude is of order 0.2 mu(B)/atom. Complementary neutron data show that the temperature dependence of the induced Lu intensity and its wave vector follow that of the total moment. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP EVERITT, BA (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. NR 24 TC 20 Z9 20 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD OCT 23 PY 1995 VL 75 IS 17 BP 3182 EP 3185 DI 10.1103/PhysRevLett.75.3182 PG 4 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100039 ER PT J AU JAMES, DFV MILONNI, PW FEARN, H AF JAMES, DFV MILONNI, PW FEARN, H TI SUPERLUMINALITY, PARELECTRICITY, AND EARNSHAWS THEOREM IN MEDIA WITH INVERTED POPULATIONS - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Note C1 CALIF STATE UNIV FULLERTON,DEPT PHYS,FULLERTON,CA 92634. RP JAMES, DFV (reprint author), LOS ALAMOS NATL LAB,DIV THEORET T4,LOS ALAMOS,NM 87545, USA. RI James, Daniel/B-9805-2009 OI James, Daniel/0000-0003-3981-4602 NR 5 TC 1 Z9 1 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 OCT 23 PY 1995 VL 75 IS 17 BP 3194 EP 3194 DI 10.1103/PhysRevLett.75.3194 PG 1 WC Physics, Multidisciplinary SC Physics GA TB161 UT WOS:A1995TB16100042 ER PT J AU WITELSKI, TP COHEN, DS AF WITELSKI, TP COHEN, DS TI PERTURBED REVERSIBLE-SYSTEMS SO PHYSICS LETTERS A LA English DT Article DE REVERSIBLE DYNAMICS; ABELS NONLINEAR DIFFERENTIAL EQUATION; BASINS OF ATTRACTION; ORDINARY DIFFERENTIAL EQUATIONS AB For a class of nonlinear evolution equations describing reversible processes with several equilibrium solutions, we will demonstrate that the addition of time-dependent disturbances can significantly change the stability properties of the model. In particular, we will show that the introduction of bounded time-dependent forcing can cause singular changes in the basins of attraction for Abel's nonlinear ordinary differential equation. C1 CALTECH,DEPT APPL MATH,PASADENA,CA 91125. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP WITELSKI, TP (reprint author), MIT,DEPT MATH,2-336,77 MASSACHUSETTS AVE,CAMBRIDGE,MA 02139, USA. RI Witelski, Thomas/G-5389-2016 OI Witelski, Thomas/0000-0003-0789-9859 NR 7 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD OCT 23 PY 1995 VL 207 IS 1-2 BP 83 EP 86 DI 10.1016/0375-9601(95)00662-M PG 4 WC Physics, Multidisciplinary SC Physics GA TB271 UT WOS:A1995TB27100014 ER PT J AU TAYLOR, WL HURLY, JJ MEYER, BA DUNLOP, PJ AF TAYLOR, WL HURLY, JJ MEYER, BA DUNLOP, PJ TI BINARY DIFFUSION-COEFFICIENTS OF HELIUM/HYDROGEN ISOTOPE MIXTURES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SYSTEMS; HE AB Mass diffusion coefficients have been measured for the six binary mixtures formed from He-3 and He-4 with hydrogen, deuterium, and tritium. An intermolecular potential of the Hartree-Fock-dispersion form is presented which, when employed in the quantum mechanical theoretical evaluation of the diffusion coefficient, correlates experimental results for all six systems within the experimental uncertainty. No isotopic effect is displayed by the correlating potential. (C) 1995 American Institute of Physics. C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV ADELAIDE,DEPT CHEM,ADELAIDE,SA 5005,AUSTRALIA. RP TAYLOR, WL (reprint author), UNIV CINCINNATI,DEPT CHEM,CINCINNATI,OH 45221, USA. NR 41 TC 13 Z9 13 U1 2 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 OCT 22 PY 1995 VL 103 IS 16 BP 6959 EP 6965 DI 10.1063/1.470373 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TA441 UT WOS:A1995TA44100013 ER PT J AU KRAJCARBRONIC, I KIMURA, M AF KRAJCARBRONIC, I KIMURA, M TI ELECTRON-ENERGY DISTRIBUTION-FUNCTIONS AND THERMALIZATION TIMES IN METHANE AND IN ARGON-METHANE MIXTURES - AN EFFECT OF VIBRATIONAL-EXCITATION PROCESSES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GASES; DEGRADATION AB Electron thermalization in methane and argon-methane mixtures is studied by using the Boltzmann equation. The presence of low-lying vibrational excited states in methane significantly changes electron energy distribution functions and relaxation times. We found that (i) the mean electron energy just below the first vibrational excited state is reached faster by 1000 times when the vibrational states are taken into account, and (ii) electron energy distribution functions have distinct peaks at energy intervals equal to the vibrational threshold energies. Both these effects are due to large vibrational stopping cross section. The thermalization time in mixtures of argon-methane (without vibrational states) smoothly changes as the mixture composition varies, and no significant difference in the electron energy distribution function is observed. When the vibrational excited states are taken into account, thermalization is almost completely defined by CH4, even at very low fractional concentrations of CH4. The sensitivity of the electron energy distribution functions on the momentum transfer cross sections used in calculation on the thermalization is discussed. (C) 1995 American Institute of Physics. C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. RP KRAJCARBRONIC, I (reprint author), RUDJER BOSKOVIC INST, ZAGREB, CROATIA. NR 18 TC 10 Z9 10 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD OCT 22 PY 1995 VL 103 IS 16 BP 7104 EP 7113 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TA441 UT WOS:A1995TA44100031 ER PT J AU CREMER, PS SOMORJAI, GA AF CREMER, PS SOMORJAI, GA TI SURFACE SCIENCE AND CATALYSIS OF ETHYLENE HYDROGENATION SO JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS LA English DT Article ID TRANSITION-METAL SURFACES; ETHYLIDYNE FORMATION; DEUTERIUM-EXCHANGE; CRYSTAL-FACE; DELTA-PHI; PT(111); ADSORPTION; DECOMPOSITION; ACETYLENE; COVERAGE AB Surface science and catalysis have been combined over the last 15 years to study the hydrogenation of the simplest alkene, ethylene, over late-transition-metal catalysts. Ethylene hydrogenation has been used as a model reaction because it yields only one product while permitting molecular information to be gleaned on an important class of chemical reactions. Enormous progress has been achieved in this field in recent years by the application of reaction rate and surface spectroscopic studies. The role of carbon-containing overlayers covering the surface during reaction has been identified, intermediates present during reaction have been observed and detailed molecular mechanisms for this reaction can be proposed. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. NR 52 TC 136 Z9 136 U1 1 U2 38 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 0956-5000 J9 J CHEM SOC FARADAY T JI J. Chem. Soc.-Faraday Trans. PD OCT 21 PY 1995 VL 91 IS 20 BP 3671 EP 3677 DI 10.1039/ft9959103671 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TC051 UT WOS:A1995TC05100017 ER PT J AU CAYON, L SMOOT, G AF CAYON, L SMOOT, G TI HOT AND COLD SPOTS IN THE FIRST PLUS 2ND YEAR COBE/DMR MAPS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMOLOGY, OBSERVATIONS ID RADIOMETER 1ST-YEAR MAPS AB Density perturbations at the decoupling epoch produce angular fluctuations in the temperature of the cosmic microwave background (CMB) radiation that may appear as hot and cold spots. Observational data of the CMB include instrumental noise in addition to cosmological signal. One would like to determine which of the observed spots are produced by noise and which correspond to signal In this work we first present a statistical analysis of the first plus second year COBE/DMR map at 53 GHz that reveals the presence of a cosmological signal in the data. The analysis is based on Harrison-Zeldovich Monte Carlo realizations and utilizes a generalized chi(2) statistic. The method is applied to the number of spots and the fraction of the total area that appears above or below a certain value of the dispersion of the noise, including and excluding the quadrupole, giving Q(rms-PS) - 15(-6)(+3), 18(-7)(+5) mu K and Q(rms-PS) = 18(-4)(+3), 21 +/- 6 mu K, respectively, at the 95% confidence level. The data taken by the COBE/DMR experiment during the first 2 years at three different frequencies (31, 53, and 90 GHz) are used to determine which of the spots observed at 53 GHz appear simultaneously in the other two channels. The significance of those spots is determined by comparing their area and signal-to-noise ratio with noise Monte Carlo simulations. We point out two cold spots and one hot spot at positions (l, b) approximate to (-99 degrees, 57 degrees), (-21 degrees, -45 degrees), (-81 degrees, -33 degrees) respectively, at the 95% confidence level. RP CAYON, L (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. NR 21 TC 17 Z9 17 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 OCT 20 PY 1995 VL 452 IS 2 BP 487 EP 494 DI 10.1086/176321 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RY932 UT WOS:A1995RY93200001 ER PT J AU KOENIGSBERGER, G GUINAN, E AUER, L GEORGIEV, L AF KOENIGSBERGER, G GUINAN, E AUER, L GEORGIEV, L TI ULTRAVIOLET OBSERVATIONS OF THE ERUPTION IN THE SMALL MAGELLANIC CLOUD WOLF-RAYET SYSTEM HD-5980 SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, ECLIPSING; STARS, INDIVIDUAL (HD 5980); STARS, VARIABLES, OTHER (LUMINOUS BLUE VARIABLES); STARS, WOLF-RAYET; ULTRAVIOLET, STARS ID STARS; HD-5980; SMC AB We present results of IUE observations (lambda lambda 1200-3200) of the erupting system HD 5980 obtained in 1994 November and December. The 1994 spectrum presents emission lines from ions such as N III, Si II-III and Al III which were absent in 1991. There is a systematic tendency towards higher degrees of ionization over the 44 days covered by the present observations. At the start of the observations on HJD 2449674 the UV continuum flux at 1850 A is a factor of similar to 2 larger than in 1991, declining by 30% in 18 days, followed by a tendency to once again increase. FES magnitudes indicate a rapid decline in visual brightness after maximum in the eruption. Wind speeds as high as similar to 1700 km s(-1) are measured although the P Cygni absorption components are highly peculiar, containing several emission-like ''bumps,'' the most prominent of which lies at 920 km s(-1). We conclude that the eruption occurred in the primary star of the 19.3 day orbital pair, the one classified as WN4 by Breysacher et al. and which now is displaying an LBV-type event. The phenomena in HD 5980 provide evidence supporting evolutionary scenarios in which pulsationally unstable, H-rich WN stars precede the LBV phase. C1 VILLANOVA UNIV,DEPT PHYS & ASTRON,VILLANOVA,PA 19085. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV SOFIA,DEPT ASTRON,BU-1126 SOFIA,BULGARIA. RP KOENIGSBERGER, G (reprint author), UNIV NACL AUTONOMA MEXICO,INST ASTRON,APDO POSTAL 70-264,MEXICO CITY 04510,DF,MEXICO. NR 17 TC 21 Z9 21 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 OCT 20 PY 1995 VL 452 IS 2 BP L107 EP L110 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA RY935 UT WOS:A1995RY93500007 ER PT J AU FULLAGAR, WK COOKSON, D RICHARDSON, JW REYNOLDS, PA WHITE, JW AF FULLAGAR, WK COOKSON, D RICHARDSON, JW REYNOLDS, PA WHITE, JW TI DISPROPORTIONATION OF RB3C60 BY AMMONIA TO PRODUCE 2 NEW AMMONIATED FULLERIDES SO CHEMICAL PHYSICS LETTERS LA English DT Article ID C-60 AB Intercalation of ammonia into the superconductor Rb3C60 results in the short term in the formation of a material best described as quasicrystalline or icosahedrally coordinated glass, When allowed to age and equilibrate, this material disproportionates to a mixture of orthorhombic RbC60 and two new phases whose structures we have determined by combined X-ray and neutron powder diffraction. They are a cubic Fm-3m phase, Rb3C60(ND3)(4.8), and a body-centred orthorhombic Immm phase of composition Rb4C60(ND3)(1.7). C1 AUSTRALIAN NATL BEAMLINE FACIL,PHOTON FACTORY,TSUKUBA,IBARAKI,JAPAN. ARGONNE NATL LAB,IPNS,ARGONNE,IL 60439. RP FULLAGAR, WK (reprint author), AUSTRALIAN NATL UNIV,RES SCH CHEM,GPO BOX 4,CANBERRA,ACT 0200,AUSTRALIA. NR 13 TC 6 Z9 6 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD OCT 20 PY 1995 VL 245 IS 1 BP 102 EP 106 DI 10.1016/0009-2614(95)00976-B PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TA474 UT WOS:A1995TA47400018 ER PT J AU LIU, Y SCHWARZ, SA ZHAO, W QUINN, J SOKOLOV, L RAFAILOVICH, M IYENGAR, D KRAMER, EJ DOZIER, W FETTERS, LJ DICKMAN, R AF LIU, Y SCHWARZ, SA ZHAO, W QUINN, J SOKOLOV, L RAFAILOVICH, M IYENGAR, D KRAMER, EJ DOZIER, W FETTERS, LJ DICKMAN, R TI CONCENTRATION PROFILES OF END-GRAFTED, DIBLOCK AND TRIBLOCK POLYMERS IN THE MELT - NEAR-WALL STRUCTURE AND EFFECTS OF SEGMENT-WALL INTERACTION SO EUROPHYSICS LETTERS LA English DT Article ID MONTE-CARLO SIMULATIONS; 2 PLATES; NEUTRON-DIFFRACTION; POLYSTYRENE CHAINS; SURFACE; BULK; INTERFACES; CONFORMATION; DIMENSIONS; SEGREGATION AB We report a neutron reflectivity and secondary-ion mass spectrometry study of segment-density profiles of grafted polymers in a homopolymer matrix. The effect of monomer-wall interactions was investigated by grafting to ''neutral'' or ''attractive'' interfaces. The low-density grafting regime was studied where bulk-like screening of the excluded-volume interactions for grafted chains is expected to be effective. Experiments confirm this picture of screened interactions. Current many-chain calculations do not appear to predict the ideal chain statistics observed for the neutral-wall case, nor reproduce the experimentally observed variation of the profiles with wall interaction strength. C1 CUNY QUEENS COLL,DEPT PHYS,FLUSHING,NY 11367. CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853. ARGONNE NATL LAB,IPNS,ARGONNE,IL 60439. EXXON RES & ENGN CO,ANNANDALE,NJ 08801. CUNY HERBERT H LEHMAN COLL,DEPT PHYS & ASTRON,BRONX,NY 10468. RP LIU, Y (reprint author), SUNY STONY BROOK,DEPT MAT SCI & ENGN,STONY BROOK,NY 11794, USA. RI R, Dhamodharan/D-2203-2012; Dickman, Ronald/J-6121-2014 OI Dickman, Ronald/0000-0003-2378-9393 NR 44 TC 20 Z9 20 U1 0 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 OCT 20 PY 1995 VL 32 IS 3 BP 211 EP 216 DI 10.1209/0295-5075/32/3/004 PG 6 WC Physics, Multidisciplinary SC Physics GA TC610 UT WOS:A1995TC61000004 ER PT J AU KLEFF, S ANDRULIS, ED ANDERSON, CW STERNGLANZ, R AF KLEFF, S ANDRULIS, ED ANDERSON, CW STERNGLANZ, R TI IDENTIFICATION OF A GENE ENCODING A YEAST HISTONE H4 ACETYLTRANSFERASE SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Note ID SACCHAROMYCES-CEREVISIAE; EXTENSIVE PURIFICATION; ACETYLATION; MUTANTS; NUCLEOSOMES; CHROMATIN; VECTORS; NUCLEI; CELLS; DNA AB A collection of yeast temperature-sensitive mutants was screened by an enzymatic assay to find a mutant defective in the acetylation of histone H4. The assay used a fractionated cell extract and measured acetylation of a peptide corresponding to amino acids 1-28 of H4. There are at least two activities in this fraction that acetylate the peptide. A mutation, hat1-1, that eliminates one of the activities was identified and mapped to a locus near the centromere of chromosome XVI. The HAT1 gene was cloned and found to encode a protein of 374 amino acids. Analysis of the peptide used in the assay demonstrated that the HAT1 enzyme acetylates lysine 12 of histone H4. hat1 mutants have no obvious growth defects or phenotypes other than the enzyme defect itself. The HAT1 protein expressed in Escherichia coli gave histone acetyltransferase activity in vitro, demonstrating that HAT1 is the structural gene for the enzyme. C1 SUNY STONY BROOK, DEPT BIOCHEM & CELL BIOL, STONY BROOK, NY 11794 USA. BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA. FU NCRR NIH HHS [RR02-427]; NIGMS NIH HHS [GM28220] NR 24 TC 221 Z9 226 U1 1 U2 3 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 EI 1083-351X J9 J BIOL CHEM JI J. Biol. Chem. PD OCT 20 PY 1995 VL 270 IS 42 BP 24674 EP 24677 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TB465 UT WOS:A1995TB46500014 PM 7559580 ER PT J AU KIM, J EK, M AF KIM, J EK, M TI A SIMULATION OF THE SURFACE-ENERGY BUDGET AND SOIL-WATER CONTENT OVER THE HYDROLOGIC ATMOSPHERIC PILOT EXPERIMENTS-MODELIZATION DU BILAN HYDRIQUE FOREST SITE SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID HAPEX-MOBILHY; SIMPLE PARAMETERIZATION; CLIMATE MODELS; LAND; MOISTURE; SENSITIVITY; EVAPORATION; CIRCULATION; LAYER AB The surface energy budget and soil water content variation are simulated for a two month period during the 1986 Hydrologic Atmospheric Pilot Experiment-Modelisation du Bilan Hydrique (HAPEX-MOBILHY) (J.C. Andre et al., 1988) using the Oregon State University Coupled Atmosphere Plant Snow (CAPS) model. When initialized and driven by the observed soil water content and atmospheric forcing, the CAPS model closely simulated the observed surface energy budget and the variation of soil water content. Lateral transports of soil water may cause significant impacts on the simulated soil water content during the later part of the simulation. Vegetation appears to significantly affect the surface energy budget and temporal variation of soil water content. We found two major mechanisms by which vegetation controls the surface energy budget and soil water content: (I) dependencies of transpiration on ambient conditions, and (2) direct hydrological coupling between the atmosphere and deep soil water through the root structure. Compared to the simulation without vegetation, net effects of vegetation are (1) sustained evaporation over the entire simulation period, (2) more gradual variation of near surface soil water content, and (3) continued reduction of deep soil water content through transpiration. Soil heat flux becomes an important component of the surface energy budget over a bare soil surface. The simulated surface energy budget is strongly dependent on the initial soil water content, however, dependence of the simulated surface energy budget on the initial soil temperature was relatively minor. C1 OREGON STATE UNIV, CORVALLIS, OR 97331 USA. RP KIM, J (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. NR 24 TC 41 Z9 42 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 OCT 20 PY 1995 VL 100 IS D10 BP 20845 EP 20854 DI 10.1029/95JD01469 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA TD507 UT WOS:A1995TD50700005 ER PT J AU JEONG, GT KYE, JI CHUN, SH KHIM, ZG LEE, WC CANFIELD, PC CHO, BK JOHNSTON, DC AF JEONG, GT KYE, JI CHUN, SH KHIM, ZG LEE, WC CANFIELD, PC CHO, BK JOHNSTON, DC TI ENERGY-GAP OF QUATERNARY COMPOUND SUPERCONDUCTOR YNI2B2C AND LUNI2B2C BY POINT-CONTACT SPECTROSCOPY SO PHYSICA C LA English DT Article AB Tunneling spectra of a single crystalline YNi2B2C (T-c = 15.4 K) and LuNi2B2C (T-c = 15.7 K) have been measured by a point-contact spectroscopy using a low-temperature scanning tunneling microscope. The conductance curve of these materials shows a smeared gap structure with an almost linear density of states inside of the gap region as well as a sizable zero-bias conductance. The linear conductance inside the gap region has been explained by a proximity-induced energy gap in the degraded surface normal layer. The resulting energy gap at 4.2 K is 3.2 meV and 3.3 meV for YNi2B2C and LuNi2B2C, respectively. A simple analysis using a smeared BCS density of states, on the other hand, yields energy gap of 2.55 meV and 2.65 meV. Temperature dependence of the energy gap in LuNi2B2C shows a reasonable agreement with the BCS type temperature dependence except a slight deviation near T-c. C1 SEOUL NATL UNIV,DEPT PHYS,SEOUL 151742,SOUTH KOREA. SOOKMYUNG WOMENS UNIV,DEPT PHYS,SEOUL 140742,SOUTH KOREA. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RI Canfield, Paul/H-2698-2014 NR 16 TC 19 Z9 19 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 OCT 20 PY 1995 VL 253 IS 1-2 BP 48 EP 52 DI 10.1016/0921-4534(95)00414-9 PG 5 WC Physics, Applied SC Physics GA TC910 UT WOS:A1995TC91000006 ER PT J AU SHIMAKAWA, Y JORGENSEN, JD HUNTER, BA SHAKED, H HITTERMAN, RL KUBO, Y KONDO, T MANAKO, T TAKAHASHI, H MORI, N AF SHIMAKAWA, Y JORGENSEN, JD HUNTER, BA SHAKED, H HITTERMAN, RL KUBO, Y KONDO, T MANAKO, T TAKAHASHI, H MORI, N TI PRESSURE EFFECTS ON T-C AND STRUCTURE IN OVERDOPED TLSR2CACU2O7-DELTA SO PHYSICA C LA English DT Article ID SUPERCONDUCTING TRANSITION-TEMPERATURE; CHARGE-TRANSFER; OXYGEN NONSTOICHIOMETRY; CARRIER CONCENTRATION; HALL-COEFFICIENT; DEPENDENCE; METAL; TL2BA2CUO6+X AB The effects of pressure on T-c and structure in overdoped T1Sr(2)CaCu(2)O(7-delta) have been investigated. For superconducting samples dT(c)/dp is small and negative with d In T-c/dp varying from -0.016 GPa(-1) to -0.006 GPa(-1). There is no significant difference in the lattice compressibilities for superconducting and nonsuperconducting metallic samples suggesting that they are not sensitive to differences in defect concentration or doping level. For the apical Cu-O(2) bond, in contrast, the compressibility is about three times as large as that for the c-axis lattice parameter in the nonsuperconducting sample, while it is nominally equal to the c-axis compressibility for the superconducting sample. This may imply a difference in the amount of carriers transferred into the CuO2 plane under pressure. C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NEC CORP LTD,FUNDAMENTAL RES LABS,TSUKUBA,IBARAKI 305,JAPAN. UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN. NUCL RES CTR NEGEV,DEPT PHYS,IL-84190 BEER SHEVA,ISRAEL. BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL. RP SHIMAKAWA, Y (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI KUBO, Yoshimi/H-2851-2011 NR 27 TC 5 Z9 5 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 OCT 20 PY 1995 VL 253 IS 1-2 BP 71 EP 78 DI 10.1016/0921-4534(95)00457-2 PG 8 WC Physics, Applied SC Physics GA TC910 UT WOS:A1995TC91000009 ER PT J AU HUR, NH CHAKOUMAKOS, BC PARANTHAMAN, M THOMPSON, JR CHRISTEN, DK AF HUR, NH CHAKOUMAKOS, BC PARANTHAMAN, M THOMPSON, JR CHRISTEN, DK TI STRUCTURE AND SUPERCONDUCTING PROPERTIES OF (TL0.8BI0.2)( SR1.6BA0.4) CA2CU3O9-DELTA SO PHYSICA C LA English DT Article AB The ''1223'' structural type of high temperature superconductor, (Tl0.8Bi0.2)(Sr1.6Ba0.4)Ca2Cu3O9-delta (referred to as Tl,Bi-1223), based on oxides of thallium and bismuth has been prepared by reaction of prereacted powders of (Sr1.6Ba0.4)Ca2Cu3O7 with Tl2O3 and Bi2O3. The as-synthesized material has a superconducting transition temperature (T-c) of 113 K, which is relatively unaffected by post-annealing either in an oxygen or an argon atmosphere. Polycrystalline samples of Tl,Bi-1223 exhibit a high persistent current density (J(p)) of 1.62 x 10(7) A/cm(2) at 5 K and 1 tesla, and maintain significant J(p) values to temperatures over 60 K. The structure of Tl,Bi-1223 has been refined using neutron powder diffraction data. The crystal structure is quite similar to those of Tl-1223 related compounds, P4/mmm symmetry with a = 3.8211 Angstrom and c = 15.4235 Angstrom. The atomic sites of thallium and oxygen in the rock-salt TlO plane are slightly vacant and occupancies of the sites were determined by the neutron diffraction study. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. RP HUR, NH (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Paranthaman, Mariappan/N-3866-2015; Chakoumakos, Bryan/A-5601-2016 OI Paranthaman, Mariappan/0000-0003-3009-8531; Chakoumakos, Bryan/0000-0002-7870-6543 NR 18 TC 7 Z9 7 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD OCT 20 PY 1995 VL 253 IS 1-2 BP 109 EP 114 DI 10.1016/0921-4534(95)00453-X PG 6 WC Physics, Applied SC Physics GA TC910 UT WOS:A1995TC91000014 ER PT J AU HOLESINGER, TG JOHNSON, JM COULTER, JY SAFAR, H PHILLIPS, DS BINGERT, JF BINGHAM, BL MALEY, MP SMITH, JL PETERSON, DE AF HOLESINGER, TG JOHNSON, JM COULTER, JY SAFAR, H PHILLIPS, DS BINGERT, JF BINGHAM, BL MALEY, MP SMITH, JL PETERSON, DE TI ISOTHERMAL MELT PROCESSING OF BI2SR2CACU2O-GAMMA ROUND WIRE SO PHYSICA C LA English DT Article ID CU-O GLASSES; THICK-FILMS AB Isothermal melt processing (IMP) has been used to process oxide-powder-in-tube (OPIT) Bi2Sr2CaCu2Oy (Bi-2212) round wire with high critical current densities. Isothermal melt processing is a process in which the melting and solidification steps are carried out at the same temperature by melting in an inert atmosphere and solidifying in a high oxygen partial pressure. For each particular oxidizing atmosphere used during IMP, the highest critical currents were found in wires processed in the temperature range between 790 degrees C to 820 degrees C. The highest critical current densities obtained in 1.0, 0.75, and 0.5 mm diameter wires at 4 K and self-field were 4.3 X 10(4), 6.0 X 10(4), and 7.9 x 10(4) A/cm(2), respectively. Transport measurements on a 0.75 mm wire revealed that critical current densities in excess of 3 X 10(4) A/cm(2) could be achieved at 4 K in applied magnetic fields of 9 T. Anisotropy measurements and SEM analysis were used to examine the radial alignment of the Bi-2212 grain colonies within the wires. RP HOLESINGER, TG (reprint author), LOS ALAMOS NATL LAB,CTR SUPERCONDUCT TECHNOL,MAIL STOP K763,LOS ALAMOS,NM 87545, USA. NR 18 TC 17 Z9 17 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 OCT 20 PY 1995 VL 253 IS 1-2 BP 182 EP 190 DI 10.1016/0921-4534(95)00491-2 PG 9 WC Physics, Applied SC Physics GA TC910 UT WOS:A1995TC91000024 ER PT J AU ORLOVA, TS KUDYMOV, AN SMIRNOV, BI MILLER, DJ LANAGAN, MT GORETTA, KC AF ORLOVA, TS KUDYMOV, AN SMIRNOV, BI MILLER, DJ LANAGAN, MT GORETTA, KC TI ELECTRIC-FIELD EFFECTS ON THE CONDUCTIVITY OF HIGHLY TEXTURED BI2SR2CACU2O-GAMMA SUPERCONDUCTORS SO PHYSICA C LA English DT Article AB An experimental study has been made of the electric field effect in an electrode/insulator/superconductor system on the critical current (I-c) and the current/voltage characteristics at 77 K of highly textured Bi2Sr2CaCu2Oy (2212) superconductors. Large polycrystalline 2212 bars were prepared by directional isothermal growth from a melt. It was established that in strong electric fields (to 120 MV/m) I-c in the bars increases as much as 20% and resistance decreases for current I > I-c. The field effect is reversible and is observed in various field orientations with respect to the growth direction of the bars. Peculiarities of the field effect are observed in the presence of hysteresis of the current/voltage characteristics. C1 RUSSIAN ACAD SCI,AF IOFFE PHYSICOTECH INST,ST PETERSBURG 194021,RUSSIA. ARGONNE NATL LAB,ARGONNE,IL 60439. RI Orlova, Tatiana/E-5877-2014 NR 13 TC 6 Z9 6 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 OCT 20 PY 1995 VL 253 IS 1-2 BP 194 EP 198 DI 10.1016/0921-4534(95)00506-4 PG 5 WC Physics, Applied SC Physics GA TC910 UT WOS:A1995TC91000026 ER PT J AU BOLDUC, JM AF BOLDUC, JM TI MUTAGENESIS AND LAUE STRUCTURES OF ENZYME INTERMEDIATES - ISOCITRATE DEHYDROGENASE (VOL 268, PG 1312, 1995) SO SCIENCE LA English DT Correction, Addition C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 2 TC 3 Z9 3 U1 0 U2 0 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD OCT 20 PY 1995 VL 270 IS 5235 BP 365 EP 365 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA374 UT WOS:A1995TA37400012 ER PT J AU HUDSON, KL ROTHENBERG, KH ANDREWS, LB KAHN, MJE COLLINS, FS AF HUDSON, KL ROTHENBERG, KH ANDREWS, LB KAHN, MJE COLLINS, FS TI GENETIC DISCRIMINATION AND HEALTH-INSURANCE - AN URGENT NEED FOR REFORM SO SCIENCE LA English DT Editorial Material C1 UNIV MARYLAND, SCH LAW, LAW & HLTH CARE PROGRAM, BALTIMORE, MD 21201 USA. NIH US DOE, WORKING GRP ETH LEGAL & SOCIAL IMPLICAT, BETHESDA, MD USA. CHICAGO KENT COLL LAW, CHICAGO, IL USA. NATL ACT PLAN BREAST CANC, HEREDITARY SUSCEPTIBIL WORKING GRP, BETHESDA, MD USA. RP NIH, NATL CTR HUMAN GENOME RES, BETHESDA, MD 20892 USA. NR 8 TC 166 Z9 166 U1 4 U2 10 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 EI 1095-9203 J9 SCIENCE JI Science PD OCT 20 PY 1995 VL 270 IS 5235 BP 391 EP 393 DI 10.1126/science.270.5235.391 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA374 UT WOS:A1995TA37400028 PM 7569991 ER PT J AU BIERMAN, PR GILLESPIE, AR CAFFEE, MW AF BIERMAN, PR GILLESPIE, AR CAFFEE, MW TI COSMOGENIC AGES FOR EARTHQUAKE RECURRENCE INTERVALS AND DEBRIS FLOW FAN DEPOSITION, OWENS-VALLEY, CALIFORNIA SO SCIENCE LA English DT Article ID NUCLIDES AB Model exposure ages (beryllium-10, aluminum-26) of boulders on an offset debris flow fan yield an earthquake recurrence interval between 5800 and 8000 Be-10:Al-26 years for a strand of the Owens Valley fault in California, which last ruptured in an earthquake of moment magnitude >7.5 in 1872. Cosmogenic age estimates for this and several nearby fan surfaces flanking the eastern Sierra Nevada are consistent with stratigraphic relations and suggest that these surfaces were abandoned after 1000, 8000, and 21,000 Be-10:Al-26 years ago. The wide scatter and nonconcordance of Be-10:Al-26 ages on an older fan surface suggest that boulder erosion and lowering of the fan surface there have influenced apparent exposure ages. C1 UNIV WASHINGTON,DEPT GEOL SCI,SEATTLE,WA 98195. LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94550. RP BIERMAN, PR (reprint author), UNIV VERMONT,DEPT GEOL,BURLINGTON,VT 05405, USA. RI Caffee, Marc/K-7025-2015 OI Caffee, Marc/0000-0002-6846-8967 NR 15 TC 64 Z9 70 U1 2 U2 16 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD OCT 20 PY 1995 VL 270 IS 5235 BP 447 EP 450 DI 10.1126/science.270.5235.447 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA374 UT WOS:A1995TA37400035 ER PT J AU STEVENS, TO MCKINLEY, JP AF STEVENS, TO MCKINLEY, JP TI LITHOAUTOTROPHIC MICROBIAL ECOSYSTEMS IN DEEP BASALT AQUIFERS SO SCIENCE LA English DT Article ID INTRODUCED ORGANIC-COMPOUNDS; CRYSTALLINE BEDROCK; METHANE; GAS; CO2; GROUNDWATER; WASHINGTON; BIOSPHERE; BACTERIA; OMAN AB Bacterial communities were detected in deep crystalline rock aquifers within the Columbia River Basalt Group (CRB). CRB ground waters contained up to 60 mu M dissolved H-2 and autotrophic microorganisms outnumbered heterotrophs. Stable carbon isotope measurements implied that autotrophic methanogenesis dominated this ecosystem and was coupled to the depletion of dissolved inorganic carbon. In laboratory experiments, H-2, a potential energy source for bacteria, was produced by reactions between crushed basalt and anaerobic water. Microcosms containing only crushed basalt and ground water supported microbial growth. These results suggest that the CRB contains a lithoautotrophic microbial ecosystem that is independent of photosynthetic primary production. RP STEVENS, TO (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 55 TC 427 Z9 452 U1 5 U2 80 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD OCT 20 PY 1995 VL 270 IS 5235 BP 450 EP 454 DI 10.1126/science.270.5235.450 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA374 UT WOS:A1995TA37400036 ER PT J AU ELIEZER, D JENNINGS, PA WRIGHT, PE DONIACH, S HODGSON, KO TSURUTA, H AF ELIEZER, D JENNINGS, PA WRIGHT, PE DONIACH, S HODGSON, KO TSURUTA, H TI THE RADIUS OF GYRATION OF AN APOMYOGLOBIN FOLDING INTERMEDIATE SO SCIENCE LA English DT Article ID PATHWAY C1 STANFORD UNIV, DEPT APPL PHYS, STANFORD, CA 94305 USA. STANFORD UNIV, STANFORD SYNCHROTRON RADIAT LAB, STANFORD, CA 94305 USA. STANFORD UNIV, DEPT CHEM, STANFORD, CA 94305 USA. RP ELIEZER, D (reprint author), SCRIPPS RES INST, DEPT MOLEC BIOL, LA JOLLA, CA 92037 USA. OI Wright, Peter/0000-0002-1368-0223 FU NCRR NIH HHS [RR01209]; NIDDK NIH HHS [DK34909]; NIGMS NIH HHS [GM14541] NR 7 TC 120 Z9 121 U1 2 U2 8 PU AMER ASSOC ADVAN SCIENCE PI WASHINGTON PA 1333 H ST NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD OCT 20 PY 1995 VL 270 IS 5235 BP 487 EP 488 DI 10.1126/science.270.5235.487 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA374 UT WOS:A1995TA37400046 PM 7570004 ER PT J AU JONES, G LU, LN VULLEV, V GOSZTOLA, DJ GREENFIELD, SR WASIELEWSKI, MR AF JONES, G LU, LN VULLEV, V GOSZTOLA, DJ GREENFIELD, SR WASIELEWSKI, MR TI PHOTOINDUCED ELECTRON-TRANSFER FOR PYRENESULFONAMIDE CONJUGATES OF TRYPTOPHAN-CONTAINING PEPTIDES - MITIGATION OF FLUOROPROBE BEHAVIOR IN N-TERMINAL LABELING EXPERIMENTS SO BIOORGANIC & MEDICINAL CHEMISTRY LETTERS LA English DT Article ID AMINO-ACIDS; PROTEINS AB The (nitro)pyrenesulfonamide group has been attached to the N-terminus of tryptophan and tryptophan-containing peptides. Intramolecular electron transfer between pyrene and Trp indole side chains, observed by fluorescence quenching and laser flash photolysis, depends on the spacing between Pyr and Trp moieties and the strength of the electron acceptor. C1 BOSTON UNIV,CTR PHOTON RES,BOSTON,MA 02215. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT CHEM,EVANSTON,IL 60208. RP JONES, G (reprint author), BOSTON UNIV,DEPT CHEM,590 COMMONWEALTH AVE,BOSTON,MA 02215, USA. RI Vullev, Valentine/E-4082-2010; Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 NR 23 TC 29 Z9 29 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0960-894X J9 BIOORG MED CHEM LETT JI Bioorg. Med. Chem. Lett. PD OCT 19 PY 1995 VL 5 IS 20 BP 2385 EP 2390 DI 10.1016/0960-894X(95)00416-Q PG 6 WC Chemistry, Medicinal; Chemistry, Organic SC Pharmacology & Pharmacy; Chemistry GA TA592 UT WOS:A1995TA59200017 ER PT J AU KLOTS, CE POLACH, J AF KLOTS, CE POLACH, J TI UNIMOLECULAR REACTIONS IN A SPHERICALLY SYMMETRICAL POTENTIAL .3. LIFETIMES OF COLLISION COMPLEXES SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PHASE-SPACE THEORY; POLYATOMIC SYSTEMS; ANGULAR-MOMENTUM; ENERGY AB We describe an analytical procedure for obtaining rate constants, branching ratios, and kinetic energy distributions following the unimolecular dissociation of a species with arbitrary energy and angular momentum. With it the effects of small changes in the assumed potential energy surface can be readily examined. Limitations to the Rice-Gershinowitz hypothesis concerning angular momentum effects are identified. It is further shown how angular momentum can affect a branching ratio and thus, indirectly, a kinetic energy distribution. C1 ACAD SCI CZECH REPUBL,J HEYROVSKY INST PHYS CHEM & ELECTROCHEM,CR-18223 PRAGUE 8,CZECH REPUBLIC. RP KLOTS, CE (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,CHEM PHYS SECT,POB 2008,OAK RIDGE,TN 37831, USA. NR 15 TC 15 Z9 15 U1 1 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 OCT 19 PY 1995 VL 99 IS 42 BP 15396 EP 15399 DI 10.1021/j100042a011 PG 4 WC Chemistry, Physical SC Chemistry GA TB810 UT WOS:A1995TB81000012 ER PT J AU LONGFELLOW, CA LEE, YT AF LONGFELLOW, CA LEE, YT TI METHANE LOSS IN THE INFRARED MULTIPHOTON DISSOCIATION OF ACETIC-ACID SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MULTI-PHOTON DISSOCIATION; UNIMOLECULAR PYROLYSIS MECHANISMS; HIGH-TEMPERATURE KINETICS; THERMAL-DECOMPOSITION; MOLECULAR-BEAM; ELIMINATION; IONIZATION; ACETATE; ETHYL; NM AB The infrared multiphoton dissociation (IRMPD) of acetic acid was studied by photofragment translational spectroscopy. Carbon dioxide and methane were observed for the first time as products from dissociation under collisionless conditions. The product translational energy distribution for this channel peaks well away from zero, which supports a four-center transition state. A previously observed channel, resulting in the formation of ketene and water, was verified. The average translational energy release for the former channel was measured to be 26.4 kcal/mol, and a value of 18.6 +/- 2 kcal/mol was obtained for the dehydration channel. With a laser fluence of 12 J/cm(2), decarboxylation accounts for roughly 35% of the total dissociation yield. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Lee, Yuan-Tseh/F-7914-2012 NR 40 TC 21 Z9 21 U1 1 U2 2 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 OCT 19 PY 1995 VL 99 IS 42 BP 15532 EP 15537 DI 10.1021/j100042a030 PG 6 WC Chemistry, Physical SC Chemistry GA TB810 UT WOS:A1995TB81000031 ER PT J AU MODENA, A NAJMUDIN, Z DANGOR, AE CLAYTON, CE MARSH, KA JOSHI, C MALKA, V DARROW, CB DANSON, C NEELY, D WALSH, FN AF MODENA, A NAJMUDIN, Z DANGOR, AE CLAYTON, CE MARSH, KA JOSHI, C MALKA, V DARROW, CB DANSON, C NEELY, D WALSH, FN TI ELECTRON ACCELERATION FROM THE BREAKING OF RELATIVISTIC PLASMA-WAVES SO NATURE LA English DT Article ID LASER-PRODUCED PLASMAS; SCATTERING; RAMAN; OSCILLATIONS; AMPLITUDE AB ELECTRONS in a plasma undergo collective wave-like oscillations near the plasma frequency, These plasma waves can have a range of wavelengths and hence a range of phase velocities(1). Of particular note are relativistic plasma waves(2,3), for which the phase velocity approaches the speed of light; the longitudinal electric field associated with such waves can be extremely large, and can be used to accelerate electrons (either injected externally or supplied by the plasma) to high energies over very short distances(2-4). The maximum electric field, and hence maximum acceleration rate, that can be obtained in this way is determined by the maximum amplitude of oscillation that can be supported by the plasma(5-8). When this limit is reached, the plasma wave is said to 'break'. Here we report observations of relativistic plasma waves driven to breaking point by the Raman forward-scattering instability(9,10) induced by short, high-intensity laser pulses, The onset of wave-breaking is indicated by a sudden increase in both the number and maximum energy (up to 44 MeV) of accelerated plasma electrons, as well as by the loss of coherence of laser light scattered from the plasma wave. C1 UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. ECOLE POLYTECH,LULI,PALAISEAU,FRANCE. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. RP MODENA, A (reprint author), UNIV LONDON IMPERIAL COLL SCI & TECHNOL,BLACKETT LAB,PRINCE CONSORT RD,LONDON SW7 2AZ,ENGLAND. RI Malka, Victor/F-5260-2010; OI Najmudin, Zulfikar/0000-0001-6323-4005 NR 29 TC 653 Z9 665 U1 6 U2 49 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD OCT 19 PY 1995 VL 377 IS 6550 BP 606 EP 608 DI 10.1038/377606a0 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TA275 UT WOS:A1995TA27500044 ER PT J AU SCHLUMPF, F BRODSKY, SJ AF SCHLUMPF, F BRODSKY, SJ TI RELATIVISTIC CORRECTIONS TO THE ELECTROMAGNETIC AND AXIAL MOMENTS OF NUCLEI AND OTHER COMPOSITE SYSTEMS SO PHYSICS LETTERS B LA English DT Article ID SPIN; ROTATION AB We calculate the electromagnetic and axial nuclear moments of the deuteron and triton as a function of their radius using a relativistic two-nucleon and three-nucleon model formulated on the light-cone. The results also provide an estimate of the nuclear binding corrections to helicity-dependent deep inelastic scattering sum rules, At large nucleon radius, the moments are given by the usual nonrelativistic formulae modified by finite binding effects. At small radius, the moments take the canonical values given by the generalization of the Drell-Heam-Gerasimov sum rule. In addition, as R --> 0, the constituent helicities become completely disoriented, and the Gamow-Teller matrix element vanishes. Thus, in the pointlike limit MR --> 0, the moments of spin-one bound states coincide with the canonical couplings of elementary spin-one bosons of the Standard Model, mu = e/M, Q = -e/M(2), and g(A) = 0, Similarly, in the case of spin-half systems, the magnetic moment approaches the Dirac value mu = e/2M, and the axial coupling g(A) vanishes. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP SCHLUMPF, F (reprint author), UNIV MARYLAND,CTR THEORET PHYS,DEPT PHYS,COLLEGE PK,MD 20742, USA. NR 31 TC 13 Z9 13 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 OCT 19 PY 1995 VL 360 IS 1-2 BP 1 EP 6 DI 10.1016/0370-2693(95)01135-D PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA TA660 UT WOS:A1995TA66000001 ER PT J AU SCURLOCK, RD WANG, BJ OGILBY, PR SHEATS, JR CLOUGH, RL AF SCURLOCK, RD WANG, BJ OGILBY, PR SHEATS, JR CLOUGH, RL TI SINGLET OXYGEN AS A REACTIVE INTERMEDIATE IN THE PHOTODEGRADATION OF AN ELECTROLUMINESCENT POLYMER SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TRANSFER PHOTO-OXYGENATION; LIGHT-EMITTING-DIODES; C-60 TRIPLET; STILBENE; BLUE; POLYACETYLENE; 1-DELTA-GO-2; DEACTIVATION; TEMPERATURE; VINYLENE) AB Singlet molecular oxygen (a(1) Delta g) is shown to be a reactive intermediate in the photoinduced oxidative decomposition of the electroluminescent material poly(2,5-bis(5,6-dihydrocholestanoxy)-1,4-phenylenevinylene) [BCHA-PPV] in both liquid solutions and solid films. Upon irradiation of this polymer in CS2, singlet oxygen is produced by energy transfer from the BCHA-PPV triplet state to ground state oxygen with a quantum yield of similar to 0.025. Singlet oxygen reacts with BCHA-PPV, resulting in extensive chain scission of the macromolecule. The reaction with singlet oxygen is unique to the polymer; the monomeric analog of this system, stilbene, does not appreciably react with singlet oxygen. Polymer degradation is proposed to proceed via addition of singlet oxygen in a (pi)2 + (pi)2 cycloaddition reaction to the double bond that connects phenylene groups in the macromolecule. C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. HEWLETT PACKARD LABS,PALO ALTO,CA 94303. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 57 TC 273 Z9 280 U1 2 U2 37 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 OCT 18 PY 1995 VL 117 IS 41 BP 10194 EP 10202 DI 10.1021/ja00146a004 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA TB353 UT WOS:A1995TB35300004 ER PT J AU XANTHEAS, SS AF XANTHEAS, SS TI THEORETICAL-STUDY OF HYDROXIDE ION-WATER CLUSTERS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID BASIS-SETS; GAS-PHASE; AB-INITIO; HYDRATION; ABINITIO; PROTON; HYDROGEN; ENERGY; OH AB The optimal structures, harmonic vibrational frequencies, and incremental association enthalpies for the OH-(H2O)(n)(n = 1-3) clusters have been computed at the MP2/aug-cc-p VDZ level of theory, the first ones reported at the correlated level for the n = 2 and 3 clusters. The incremental association enthalpies at 298 K were estimated at -27.0, -20.1, and -16.9 kcal/mol, respectively, within the error bars of recent experimental measurements for the n = 1, 2, and 3 clusters. Two almost isoenergetic isomers were identified for the n = 3 cluster. Hydrogen bonding between water molecules was found in the n = 3 but not the n = 2 cluster, the structure of which is determined by the strong hydroxide ion-water interaction. Hydration of the hydroxide ion results in a decrease in its bond length with an accompanying increase in the analogous frequency that eventually ''scrambles'' with the one of the ''free'' (non-hydrogen bonded) stretches in water. The most active infrared (IR) modes correspond to OH stretches which are hydrogen bonded to the hydroxide ion in the range 2500-3000 cm(-1) in agreement with experimental infrared multiple internal reflectance (IR-MIR) measurements of aqueous hydroxide. RP XANTHEAS, SS (reprint author), PACIFIC NW LAB, THEORY MODELING & SIMULAT MOLEC SCI LAB, POB 999,MS K1-83, RICHLAND, WA 99352 USA. RI Xantheas, Sotiris/L-1239-2015; OI Xantheas, Sotiris/0000-0002-6303-1037 NR 33 TC 148 Z9 149 U1 2 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD OCT 18 PY 1995 VL 117 IS 41 BP 10373 EP 10380 DI 10.1021/ja00146a023 PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA TB353 UT WOS:A1995TB35300023 ER PT J AU FRITZ, IJ DAWSON, LR OLSEN, JA HOWARD, AJ AF FRITZ, IJ DAWSON, LR OLSEN, JA HOWARD, AJ TI GRADED-COMPOSITION BUFFER LAYERS USING DIGITAL ALGAASSB ALLOYS SO APPLIED PHYSICS LETTERS LA English DT Article ID REFRACTIVE-INDEX; SUPERLATTICES; EPITAXY; CAVITY; LIGHT; GAAS AB We describe step-graded digital-alloy buffers using alternate layers of Al0.5Ga0.5As and Al0.5Ga0.5As0.65Sb0.35 grown on GaAs substrates by molecular beam epitaxy. The buffers consist of three sets of superlattices with AlGaAs/AlGaAsSb layer thicknesses of 7.7/2.3 nm, 5.4/4.6 nm, and 3.1/6.9 nm, respectively, terminating in a lattice constant equal to that of bulk In0.32Ga0.68As. Transmission electron micrographs show that most of the misfit-generated dislocations lie near the steps in pseudoalloy composition, and atomic force micrographs indicate a rms surface roughness of 3.6 nm. A 20.5-period lattice-matched InGaAs/InAlAs reflector stack grown on such a buffer has a peak reflectivity of 98% near 1.3 mu m. These buffers provide potentially useful substrates for optoelectronic device applications near 1.3 mu m using strained InGaAs active regions. (C) 1995 American Institute of Physics. RP FRITZ, IJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 16 TC 4 Z9 4 U1 2 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 OCT 16 PY 1995 VL 67 IS 16 BP 2320 EP 2322 DI 10.1063/1.114331 PG 3 WC Physics, Applied SC Physics GA RZ451 UT WOS:A1995RZ45100020 ER PT J AU PEARTON, SJ LEE, JW MACKENZIE, JD ABERNATHY, CR SHUL, RJ AF PEARTON, SJ LEE, JW MACKENZIE, JD ABERNATHY, CR SHUL, RJ TI DRY ETCH DAMAGE IN INN, INGAN, AND INALN SO APPLIED PHYSICS LETTERS LA English DT Article ID PLASMAS AB Changes in conductivity of InN, In0.5Ga0.5N, and In0.5Al0.5N layers exposed to Ar plasmas under both electron cyclotron resonance and reactive ion etching conditions have been measured as a function of rf power, pressure, and exposure time. The combination of high microwave and high rf powers produces large increases (10-10(4) times) in sheet resistance of the nitrides, but conditions more typical of real etching processes (rf power <150 W) do not change the electrical properties. The nitrides are more resistant to damage introduction than other III-V semiconductors. The removal of damage-related traps occurs with an activation energy of similar to 2.7 eV. (C) 1995 American Institute of Physics. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP PEARTON, SJ (reprint author), UNIV FLORIDA,GAINESVILLE,FL 32611, USA. NR 15 TC 73 Z9 75 U1 3 U2 7 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 OCT 16 PY 1995 VL 67 IS 16 BP 2329 EP 2331 DI 10.1063/1.114334 PG 3 WC Physics, Applied SC Physics GA RZ451 UT WOS:A1995RZ45100023 ER PT J AU ERNST, P GENG, C SCHOLZ, F SCHWEIZER, H ZHANG, Y MASCARENHAS, A AF ERNST, P GENG, C SCHOLZ, F SCHWEIZER, H ZHANG, Y MASCARENHAS, A TI BAND-GAP REDUCTION AND VALENCE-BAND SPLITTING OF ORDERED GAINP2 SO APPLIED PHYSICS LETTERS LA English DT Article ID SEMICONDUCTOR ALLOYS; PHOTOLUMINESCENCE; GA0.52IN0.48P; GA0.5IN0.5P; DEPENDENCE AB Low-temperature photoluminescence excitation spectra are used to determine the order-dependent parameters: valence-band splitting and band-gap reduction in spontaneously ordered GaInP2. Effects due to composition fluctuations between different samples and the associated strain, as well as the excitonic binding energies, have been properly taken into account to yield accurate band-gap reduction and valence-band splitting values. The results from recently published ab initio band structure calculations are used to extrapolate the band-gap reduction from the strongest experimentally realized degree of ordering to perfect ordering. We find a total band-gap reduction of 471+/-12 meV, which is very close to recent theoretical predictions. (C) 1995 American Institute of Physics. C1 UNIV STUTTGART,INST PHYS,D-70550 STUTTGART,GERMANY. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 19 TC 163 Z9 164 U1 2 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD OCT 16 PY 1995 VL 67 IS 16 BP 2347 EP 2349 DI 10.1063/1.114340 PG 3 WC Physics, Applied SC Physics GA RZ451 UT WOS:A1995RZ45100029 ER PT J AU FOX, CA MCMASTER, MC HSU, WL KELLY, MA HAGSTROM, SB AF FOX, CA MCMASTER, MC HSU, WL KELLY, MA HAGSTROM, SB TI DIAMOND DEPOSITION FROM FLUORINATED PRECURSORS USING MICROWAVE-PLASMA CHEMICAL-VAPOR-DEPOSITION SO APPLIED PHYSICS LETTERS LA English DT Article ID GROWTH; GAS; KINETICS; METHYL; FILMS AB Diamond thin films were grown using fluorinated precursors by microwave plasma-assisted chemical vapor deposition. Using CH4/H-2, CH3F/H-2, and CF4/H-2 gas mixtures, films were, grown at surface temperatures in the range 600-900 degrees C at constant microwave power, carbon mole fraction, and pressure. Growth activation energies for the CH4/H-2, CH3F/H-2, and CF4/H-2 mixtures were 12.6+/-1.8, 13.7+/-1.2, and 12.4+/-1.1 kcal/mole, respectively. Argon ion etching in conjunction with x-ray photoelectron spectroscopy indicated negligible fluorine incorporation into the films. These results are consistent with the hypothesis that diamond is grown from the same intermediates, namely methyl radicals and atomic hydrogen, for all of these mixtures. (C) 1995 American Institute of Physics. C1 STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305. RP FOX, CA (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. NR 14 TC 26 Z9 26 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 OCT 16 PY 1995 VL 67 IS 16 BP 2379 EP 2381 DI 10.1063/1.114351 PG 3 WC Physics, Applied SC Physics GA RZ451 UT WOS:A1995RZ45100040 ER PT J AU WU, XD FOLTYN, SR ARENDT, PN BLUMENTHAL, WR CAMPBELL, IH COTTON, JD COULTER, JY HULTS, WL MALEY, MP SAFAR, HF SMITH, JL AF WU, XD FOLTYN, SR ARENDT, PN BLUMENTHAL, WR CAMPBELL, IH COTTON, JD COULTER, JY HULTS, WL MALEY, MP SAFAR, HF SMITH, JL TI PROPERTIES OF YBA2CU3O7-DELTA THICK-FILMS ON FLEXIBLE BUFFERED METALLIC SUBSTRATES SO APPLIED PHYSICS LETTERS LA English DT Article ID TRANSPORT-PROPERTIES; LASER DEPOSITION; BICRYSTALS; LAYERS AB We report superconducting and mechanical properties of YBa2Cu3O7-delta (YBCO) thick films on Ni-based alloys with a textured yttria-stabilized zirconia (YSZ) buffer layer. The YBCO and YSZ layers were deposited by pulsed laser deposition and ion beam assisted deposition, respectively. It was found that the transport critical current density (J(c)) correlates very well with the YBCO mosaic spread. J, over 1x10(6) A/cm(2) at 75 K and similar to 1X10(7) A/cm(2) at 4 K were obtained in the 1-mu m thick YBCO films. Zero field critical current of 120 amps at 75 K was obtained in a 2-mu m-thick and l-cm-wide YBCO film. Angular dependence measurement revealed J, peaks for both H parallel to c and H parallel to a-b. The peak for H parallel to c implies additional pinning due to defects such as small angle grain boundaries or twin boundaries. Bending tests at 75 K showed that the YBCO thick films on the metallic substrates could sustain a strain of 0.4% and over 1% for tension and compression,respectively. (C) 1995 American Institute of Physics. RP WU, XD (reprint author), LOS ALAMOS NATL LAB,SUPERCOND TECHNOL CTR,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 14 TC 294 Z9 315 U1 3 U2 25 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD OCT 16 PY 1995 VL 67 IS 16 BP 2397 EP 2399 DI 10.1063/1.114559 PG 3 WC Physics, Applied SC Physics GA RZ451 UT WOS:A1995RZ45100046 ER PT J AU ANDREWS, GF AF ANDREWS, GF TI BIOPROCESS OPTIMIZATION AND CONTROL - APPLICATION OF HYBRID MODELING - DISCUSSION SO JOURNAL OF BIOTECHNOLOGY LA English DT Discussion ID GROWTH RP ANDREWS, GF (reprint author), IDAHO NATL ENGN LAB,CTR IND BIOTECHNOL & PROC ENGN,POB 1625,IDAHO FALLS,ID 83415, USA. NR 4 TC 1 Z9 1 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1656 J9 J BIOTECHNOL JI J. Biotechnol. PD OCT 16 PY 1995 VL 42 IS 3 BP 281 EP 284 DI 10.1016/0168-1656(95)00074-Z PG 4 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA TB808 UT WOS:A1995TB80800009 ER PT J AU KAVKA, AE FAHLANDER, C BACKLIN, A CLINE, D CZOSNYKA, T DIAMOND, RM DISDIER, D KERNAN, WJ KRAUS, L LINCK, I SCHULZ, N SREBRNY, J STEPHENS, FS SVENSSON, LE VARNESTIG, B VOGT, EG WU, CY AF KAVKA, AE FAHLANDER, C BACKLIN, A CLINE, D CZOSNYKA, T DIAMOND, RM DISDIER, D KERNAN, WJ KRAUS, L LINCK, I SCHULZ, N SREBRNY, J STEPHENS, FS SVENSSON, LE VARNESTIG, B VOGT, EG WU, CY TI COULOMB-EXCITATION OF SE-76,SE-80,SE-82 SO NUCLEAR PHYSICS A LA English DT Article DE SE-82(O-16,O-16), E=34 MEV; TI-48(SE-76, SE-76), E=186 MEV; TI-48(SE-80,SE-82, SE-80,SE-82), E=195 MEV; SE-76(PB-208, PB-208), E=934 MEV; PB-208(SE-80,SE-82, SE-80,SE-82), E=312 MEV; MEASURED P-GAMMA(THETA), PP-GAMMA(THETA) FOLLOWING COULOMB EXCITATION; SE-76,SE-80,SE-82 DEDUCED B(E2); QUADRUPOLE MOMENTS; ENRICHED TARGETS; GE DETECTORS; PARALLEL-PLATE AVALANCHE GAS COUNTERS ID INTERACTING BOSON MODEL; EVEN SELENIUM ISOTOPES; HIGH-SPIN STATES; BAND-STRUCTURE; MASS NUCLEI; SE-76; COEXISTENCE; SCATTERING; AR-40; GAS AB The collective structure of the even-even nuclei Se-76,Se-80,Se-82 has been studied using Coulomb excitation with O-16, Ti-48, and Pb-208 ions. About 20 E2 matrix elements were determined in each isotope. The measured matrix elements are compared with the predictions of simple geometric and algebraic collective models, The E2 properties and energy level spectra of the Se-76,Se-80,Se-82 nuclei exhibit features characteristic of anharmonic vibrational collective motion, Although the simplest collective vibrational models exhibit the general features of the data, they do not reproduce the fine details. The influence of a number of physical effects on the data was investigated. These include Coulomb-nuclear interference, mutual excitation and the effect due to the semiclassical approximation of the Coulomb-excitation formalism. C1 UNIV UPPSALA,SVEDBERG LAB,S-75121 UPPSALA,SWEDEN. UNIV ROCHESTER,NUCL STRUCT RES LAB,ROCHESTER,NY 14627. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. WARSAW UNIV,HEAVY ION LAB,WARSAW,POLAND. WARSAW UNIV,INST EXPTL PHYS,WARSAW,POLAND. RP KAVKA, AE (reprint author), UNIV UPPSALA,DEPT RADIAT SCI,BOX 535,S-75121 UPPSALA,SWEDEN. NR 46 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 OCT 16 PY 1995 VL 593 IS 2 BP 177 EP 211 DI 10.1016/0375-9474(95)00327-W PG 35 WC Physics, Nuclear SC Physics GA TA399 UT WOS:A1995TA39900004 ER PT J AU SIKIVIE, P TKACHEV, II WANG, Y AF SIKIVIE, P TKACHEV, II WANG, Y TI VELOCITY PEAKS IN THE COLD DARK-MATTER SPECTRUM ON EARTH SO PHYSICAL REVIEW LETTERS LA English DT Article ID SECONDARY INFALL; INVISIBLE-AXION; COSMIC AXIONS; UNIVERSE; HALOS; EVOLUTION AB The cold dark matter spectrum on Earth is expected to have peaks in velocity space. We obtain estimates for the sizes and locations of these peaks using a generalization of the secondary infall model of galactic halo formation, which takes account of the angular momentum of the dark matter particles. The dependence of the spectrum of velocity peaks upon cosmological parameters is studied. Our results are relevant to direct dark matter search experiments. C1 UNIV CALIF SANTA BARBARA, INST THEORET PHYS, SANTA BARBARA, CA 93106 USA. FERMILAB NATL ACCELERATOR LAB, NASA, FERMILAB ASTROPHYS CTR, BATAVIA, IL 60510 USA. RUSSIAN ACAD SCI, INST NUCL RES, MOSCOW 117312, RUSSIA. RP SIKIVIE, P (reprint author), UNIV FLORIDA, DEPT PHYS, GAINESVILLE, FL 32611 USA. RI Wang, Yun/B-5724-2011 OI Wang, Yun/0000-0002-4749-2984 NR 25 TC 94 Z9 94 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 OCT 16 PY 1995 VL 75 IS 16 BP 2911 EP 2915 DI 10.1103/PhysRevLett.75.2911 PG 5 WC Physics, Multidisciplinary SC Physics GA RZ341 UT WOS:A1995RZ34100001 ER PT J AU STINTZ, A ZHAO, XM STRAUSS, CEM INGALLS, WB KYRALA, GA FUNK, DJ BRYANT, HC AF STINTZ, A ZHAO, XM STRAUSS, CEM INGALLS, WB KYRALA, GA FUNK, DJ BRYANT, HC TI RESONANT 2-PHOTON DETACHMENT THROUGH THE LOWEST SINGLET D STATE IN H- SO PHYSICAL REVIEW LETTERS LA English DT Article ID ATOMIC-HYDROGEN; FIELD; PHOTODETACHMENT; 2-PHOTON AB We report the measurement of the two-photon detachment spectrum of the D-1(e) resonance of H- just below the n = 2 threshold. The excess photon detachment resonance fits a Fano profile with energy 10.872(2) eV (relative to H- ground state), a width of 0.0105(10) eV, and a shape parameter of -8(2). To our knowledge, this describes the first time direct multiphoton excitation of a resonance has been observed in any negative atomic ion. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP STINTZ, A (reprint author), UNIV NEW MEXICO,DEPT PHYS & ASTRON,ALBUQUERQUE,NM 87131, USA. NR 19 TC 42 Z9 43 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 OCT 16 PY 1995 VL 75 IS 16 BP 2924 EP 2927 DI 10.1103/PhysRevLett.75.2924 PG 4 WC Physics, Multidisciplinary SC Physics GA RZ341 UT WOS:A1995RZ34100004 ER PT J AU STROSCIO, JA PIERCE, DT DAVIES, A CELOTTA, RJ WEINERT, M AF STROSCIO, JA PIERCE, DT DAVIES, A CELOTTA, RJ WEINERT, M TI TUNNELING SPECTROSCOPY OF BCC(001) SURFACE-STATES SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRONIC-STRUCTURE; REAL-SPACE; MICROSCOPY; RESONANCES AB We have discovered an intense, sharp feature in tunneling spectra of the Fe(001) and Cr(001) surfaces that derives from a bce surface state near the Fermi level. Band-structure calculations show that this state is a general feature of bcc (001) surfaces, and that it originates from a nearly unperturbed d orbital extending out into the vacuum region. This general feature should permit chemical identification with atomic spatial resolution on bcc (001) surfaces. The surface state is in the minority spin band for Fe and Cr, so it should be useful for future spin-polarized tunneling experiments. C1 BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP STROSCIO, JA (reprint author), NATL INST STAND & TECHNOL, ELECTRON PHYS GRP, GAITHERSBURG, MD 20899 USA. NR 24 TC 229 Z9 230 U1 1 U2 25 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD OCT 16 PY 1995 VL 75 IS 16 BP 2960 EP 2963 DI 10.1103/PhysRevLett.75.2960 PG 4 WC Physics, Multidisciplinary SC Physics GA RZ341 UT WOS:A1995RZ34100013 ER PT J AU LARKIN, AI MARCHETTI, MC VINOKUR, VM AF LARKIN, AI MARCHETTI, MC VINOKUR, VM TI PEAK EFFECT IN TWINNED SUPERCONDUCTORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID II SUPERCONDUCTORS; CREEP AB A sharp maximum in the critical current J(c) as a function of temperature just below the melting point of the Abrikosov flux lattice has recently been observed in both low- and high-temperature superconductors. This peak effect is strongest in twinned crystals for fields aligned with the twin planes. We propose that this peak signals the breakdown of the collective pinning regime and the crossover to strong pinning of single vortices on the twin boundaries. This crossover is very sharp acid can account for the steep drop of the differential resistivity observed in experiments. C1 LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA. SYRACUSE UNIV,DEPT PHYS,SYRACUSE,NY 13244. RP LARKIN, AI (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 16 TC 68 Z9 68 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 OCT 16 PY 1995 VL 75 IS 16 BP 2992 EP 2995 DI 10.1103/PhysRevLett.75.2992 PG 4 WC Physics, Multidisciplinary SC Physics GA RZ341 UT WOS:A1995RZ34100021 ER PT J AU ZHOU, FM VANBERKEL, GJ AF ZHOU, FM VANBERKEL, GJ TI ELECTROCHEMISTRY COMBINED ONLINE WITH ELECTROSPRAY MASS-SPECTROMETRY SO ANALYTICAL CHEMISTRY LA English DT Article ID CAROTENOID CATION RADICALS; FAST ATOM; ION TRAP; PARAMAGNETIC RESONANCE; REDOX REACTIONS; GAS-PHASE; IONIZATION; BIOMOLECULES; OXIDATION; MECHANISM AB In this paper a variety of methods to couple electrochemistry on-line with electrospray mass spectrometry (EC/ES-MS) are presented, and the fundamental and analytical utility of this hybrid technique is illustrated. The major problems encountered in coupling EC and ES-MS are discussed, and means to overcome them are presented. Three types of electrochemical now cells, viz., a thin-layer electrode now-by cell, a tubular electrode now-through cell, and a porous electrode now-through cell, are discussed in regard to their suitability for this coupling, Methods for coupling each of these electrochemical cells on-line with ES-MS, either floated at or decoupled from the ES high voltage and controlled by a constant current supply, a constant potential supply, or a potentiostat are presented. Three applications are used to illustrate the utility and versatility of the EC/ES-MS combination: (1) the ionization of neutral analytes (i.e., perylene) for detection by ES-MS, (2) the study of the products of electrode reactions (i.e., nickel(II) octaethylporphyrin oxidation products), including relatively short-lived products (i.e., beta-carotene oxidation products), and (3) the enhanced determination of metals (i,e., elemental silver) achieved by coupling anodic stripping voltammetry online with ES-MS. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 52 TC 144 Z9 144 U1 1 U2 33 PU AMER CHEMICAL SOC PI WASHINGTON PA PO BOX 57136, WASHINGTON, DC 20037-0136 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD OCT 15 PY 1995 VL 67 IS 20 BP 3643 EP 3649 DI 10.1021/ac00116a005 PG 7 WC Chemistry, Analytical SC Chemistry GA RZ452 UT WOS:A1995RZ45200005 ER PT J AU BARSHICK, CM SHAW, RW YOUNG, JP RAMSEY, JM AF BARSHICK, CM SHAW, RW YOUNG, JP RAMSEY, JM TI EVALUATION OF THE PRECISION AND ACCURACY OF A URANIUM ISOTOPIC ANALYSIS USING GLOW-DISCHARGE OPTOGALVANIC SPECTROSCOPY SO ANALYTICAL CHEMISTRY LA English DT Note ID MASS-SPECTROMETRY; SAMPLES; UI AB The measurement precision and accuracy were evaluated for an isotopic analysis of uranium using diode laser-excited optogalvanic spectroscopy. The ratio of U-235/(U-235 + U-238) was measured using the 776 nn uranium isotope line for five samples ranging from depleted to enriched U-235 composition. The percent relative error (accuracy) with respect to thermal ionization measurements ranged from 2.38% for a nominally 20% enriched U-235 sample to slightly greater than 30% error for a depleted one. Run-to-run, day-to-day, and sample-to-sample precision (repeatability) were measured using an enriched sample; the run-to-run precision ranged from +/-1.9% to +/-5.5% RSD, and the day-to-day precision was +/-2.6% RSD. The sample-to-sample precision, determined using three different cathodes, was found to be +/-13.5% RSD. The ratios showed no trends or biases, varying about a mean of 0.21 and ranging from a high of similar to 0.23 to a low of 0.18. A search was conducted for a stronger atomic Line and a matching higher power diode laser in an attempt to improve the signal-to-noise ratio for the depleted case. Using a 150 mW diode laser that produced nominally 42 mW chopped power at 831.84 mn, a depleted uranium oxide sample was found to contain 0.26% U-235, within 3.7% of the value found using thermal ionization mass analysis. Using this same laser, the run-to-run reproducibility improved to +/-7.8% from +/-13.6%. This level of accuracy and precision is sufficient for screening applications, where preliminary information about the isotopic composition of a sample provides the incentive for additional analysis using more precise techniques. RP BARSHICK, CM (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831, USA. NR 21 TC 25 Z9 25 U1 2 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 OCT 15 PY 1995 VL 67 IS 20 BP 3814 EP 3818 DI 10.1021/ac00116a033 PG 5 WC Chemistry, Analytical SC Chemistry GA RZ452 UT WOS:A1995RZ45200033 ER PT J AU MAGOWAN, C COPPEL, RL LAU, AOT MORONNE, MM TCHERNIA, G MOHANDAS, N AF MAGOWAN, C COPPEL, RL LAU, AOT MORONNE, MM TCHERNIA, G MOHANDAS, N TI ROLE OF THE PLASMODIUM-FALCIPARUM MATURE-PARASITE INFECTED ERYTHROCYTE SURFACE-ANTIGEN (MESA/PFEMP-2) IN MALARIAL INFECTION OF ERYTHROCYTES SO BLOOD LA English DT Article ID KNOB-LIKE PROTRUSIONS; MEMBRANE GLYCOPROTEIN; CELL MEMBRANE; PROTEIN; SKELETON; IDENTIFICATION; CYTOADHERENCE; ASSOCIATION; EXPRESSION; RECEPTOR AB During intraerythrocytic growth of Plasmodium falciparum, several parasite proteins are transported from the parasite to the erythrocyte membrane, where they bind to membrane skeletal proteins. Mature-parasite-infected erythrocyte surface antigen (MESA) has previously been shown to associate with host erythrocyte membrane skeletal protein 4.1. Using a spontaneous mutant of P falciparum that has lost the ability to synthesize MESA and 4.1-deficient erythrocytes, we examined growth of MESA(+) and MESA(-) parasites in normal and 4.1-deficient erythrocytes. Viability of MESA(+) parasites was reduced in 4.1-deficient erythrocytes as compared with that for normal erythrocytes, but MESA(-) parasites grew equally well in 4.1-deficient and normal erythrocytes. Cytoadherence of MESA(+)- and MESA (-)-parasitized normal and 4.1-deficient erythrocytes to C32 melanoma cells was similar, indicating that neither protein 4.1 nor MESA plays a major role in cytoadherence of infected erythrocytes. Localization of MESA in normal and 4.1-deficient erythrocytes was examined by confocal microscopy. MESA was diffusely distributed in the cytosol of 4.1-deficient erythrocytes but was membrane-associated in normal erythrocytes. These findings suggest that MESA binding to protein 4.1 plays a major role in intraerythrocytic parasite viability. (C) 1995 by The American Society of Hematology. C1 MONASH UNIV,DEPT MICROBIOL,CLAYTON,VIC 3168,AUSTRALIA. HOP BICETRE,LE KREMLIN BICETR,FRANCE. RP MAGOWAN, C (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,MS 74-157,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Coppel, Ross/A-6626-2008 OI Coppel, Ross/0000-0002-4476-9124 FU NIDDK NIH HHS [DK 32094] NR 30 TC 44 Z9 46 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD OCT 15 PY 1995 VL 86 IS 8 BP 3196 EP 3204 PG 9 WC Hematology SC Hematology GA RZ071 UT WOS:A1995RZ07100038 PM 7579415 ER PT J AU SINHA, R ROTHMAN, N BROWN, ED SALMON, CP KNIZE, MG SWANSON, CA ROSSI, SC MARK, SD LEVANDER, OA FELTON, JS AF SINHA, R ROTHMAN, N BROWN, ED SALMON, CP KNIZE, MG SWANSON, CA ROSSI, SC MARK, SD LEVANDER, OA FELTON, JS TI HIGH-CONCENTRATIONS OF THE CARCINOGEN 2-AMINO-1-METHYL-6-PHENYLIMIDAZO-[4,5-B]PYRIDINE (PHIP) OCCUR IN CHICKEN BUT ARE DEPENDENT ON THE COOKING METHOD SO CANCER RESEARCH LA English DT Note ID COLON CANCER; FOOD; AMINES; RISK; MEAT AB Heterocyclic aromatic amines (HAAs) are mutagenic and carcinogenic compounds found in meats cooked at high temperatures. Although chicken is consumed in large quantities in the United States, there is little information on its HAA content. The objective of this study was to measure the five predominant HAAs (IQ, MeIQ, MeIQx, DiMeIQx, and PhIP) in chicken cooked by various methods to different degrees of doneness. Chicken breasts were panfried, oven-broiled, or grilled/barbecued. Whole thickens were roasted or stewed. Skinless, boneless chicken breasts were cooked to three degrees of doneness: just until done, well done, or very well done. High levels of PNP (ranging from 12 to 480 ng/g cooked meat) were found in chicken breasts when panfried, oven-broiled, and grilled/barbecued but not in whole roasted or stewed thicken. PhIP concentration increased in skinless, boneless chicken breast with longer cooking time, higher internal temperature, and greater degree of surface browning. PhIP concentration was also high in chicken breasts cooked with Skin and bones. MeIQx and DiMeIQx levels increased with the degree of doneness, whereas IQ and MeIQ were not detectable in any of these chicken samples. Certain cooking methods produce PhIP, a known colon and breast carcinogen in rodents and possibly a human carcinogen, at substantially higher levels in chicken than has been reported previously in red meat. C1 USDA,BELTSVILLE HUMAN NUTR RES CTR,NUTR REQUIREMENTS & FUNCT LAB,BELTSVILLE,MD 20705. LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94550. NCI,DIV CANC PREVENT & CONTROL,EARLY DETECT BRANCH,ROCKVILLE,MD 20892. RP SINHA, R (reprint author), NCI,EPIDEMIOL & BIOSTAT PROGRAM,EXECUT PLAZA N,ROOM 443,6130 EXECUT BLVD,ROCKVILLE,MD 20892, USA. RI Sinha, Rashmi/G-7446-2015 OI Sinha, Rashmi/0000-0002-2466-7462 FU NCI NIH HHS [CA55861] NR 25 TC 219 Z9 222 U1 0 U2 1 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD OCT 15 PY 1995 VL 55 IS 20 BP 4516 EP 4519 PG 4 WC Oncology SC Oncology GA RZ069 UT WOS:A1995RZ06900005 PM 7553619 ER PT J AU PETERSON, SR GADBOIS, DM BRADBURY, EM KRAEMER, PM AF PETERSON, SR GADBOIS, DM BRADBURY, EM KRAEMER, PM TI IMMORTALIZATION OF HUMAN FIBROBLASTS BY SV40 LARGE T-ANTIGEN RESULTS IN THE REDUCTION OF CYCLIN D1 EXPRESSION AND SUBUNIT ASSOCIATION WITH PROLIFERATING CELL NUCLEAR ANTIGEN AND WAF1(1) SO CANCER RESEARCH LA English DT Article ID HUMAN-DIPLOID FIBROBLASTS; MAMMALIAN-CELLS; DEPENDENT KINASES; DNA-REPLICATION; BREAST-CANCER; PROTEIN; TRANSFORMATION; INHIBITION; G1; AMPLIFICATION AB Protein complexes containing cyclins and cyclin-dependent protein kinases (cdks) have been shown to be rearranged in both spontaneous and viral tumor antigen-transformed cells. We have examined G(1)- and S-phase cyclin/cdk complexes as a function of the neoplastic progression of human diploid fibroblasts transfected with the SV40 large T antigen. We find that the expression of cyclin D1 and its association with proliferating cell nuclear antigen (PCNA) and Waf1 remain unchanged in precrisis human fibroblasts transfected with SV40 large T antigen, However, in these same cells the association of cdk4 with cyclin D1, PCNA, and Waf1 is disrupted. Upon immortalization, cyclin D1 protein expression is decreased, and binding of both PCNA and Wan with the remaining cyclin D1 is reduced. In contrast, large T antigen increased the expression of cyclin A and cyclin E proteins in both precrisis and immortal cells and did not reduce the binding of PCNA or Waf1 to either cdk2 or cyclin A proteins. These results show that large T-antigen expression in human fibroblasts selectively uncouples cyclin D1 from cdk4, and subsequent immortalization of these cells results in additional changes to the cyclin D1-dependent cell cycle regulatory pathways. C1 UNIV CALIF DAVIS,DEPT BIOL CHEM,DAVIS,CA 95616. RP PETERSON, SR (reprint author), LOS ALAMOS NATL LAB,DIV LIFE SCI,MAIL STOP M880,LOS ALAMOS,NM 87545, USA. NR 43 TC 20 Z9 21 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD OCT 15 PY 1995 VL 55 IS 20 BP 4651 EP 4657 PG 7 WC Oncology SC Oncology GA RZ069 UT WOS:A1995RZ06900030 PM 7553644 ER PT J AU BLANCHE, PJ CALLOW, MJ HOLL, LG RUBIN, EM KRAUSS, RM AF BLANCHE, PJ CALLOW, MJ HOLL, LG RUBIN, EM KRAUSS, RM TI SIMILAR LOW-DENSITY-LIPOPROTEIN SUBCLASSES IN FAT-FED HUMAN-APO-B TRANSGENIC MICE AND HUMANS SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 490 EP 490 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48000486 ER PT J AU WILLIAMS, PT AF WILLIAMS, PT TI WEIGHT-GAIN IN MIDDLE-AGED MEN OCCURS AT SIMILAR RATES IN LOW-MILEAGE RUNNERS (LESS-THAN-10 MILES PER WEEK) AND HIGH-MILEAGE RUNNERS (GREATER-THAN-50 MILES PER WEEK) END IS THEREFORE UNLIKELY THE CONSEQUENCE OF PHYSICAL INACTIVITY SO CIRCULATION LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 724 EP 724 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48000718 ER PT J AU DREON, DM KRAUSS, RM AF DREON, DM KRAUSS, RM TI LOW-DENSITY-LIPOPROTEIN SUBCLASS PATTERNS ARE ASSOCIATED WITH DIFFERING LIPOPROTEIN RESPONSES TO LOW-FAT AND HIGH-MONOUNSATURATED FAT DIETS SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 738 EP 738 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48000732 ER PT J AU MCCALL, MR LABELLE, M TRIBBLE, DL AF MCCALL, MR LABELLE, M TRIBBLE, DL TI LOW-DENSITY-LIPOPROTEIN (LDC)-ASSOCIATED PAF-ACETYLHYDROLASE ACTIVITY DISTRIBUTES WITH THE SMALLEST MOST DENSE LOW-DENSITY-LIPOPROTEIN PARTICLES SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 777 EP 777 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48000771 ER PT J AU CALLOW, M RUBIN, EM AF CALLOW, M RUBIN, EM TI SITE-SPECIFIC MUTAGENESIS OF APO-B AND ANALYSIS OF ITS IN-VIVO INTERACTIONS WITH APO(A) IN THE FORMATION OF LP(A) SO CIRCULATION LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 792 EP 792 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48000785 ER PT J AU TRIBBLE, DL GONG, EL VERSTUYFT, JG CARLSON, EL EPSTEIN, CJ AF TRIBBLE, DL GONG, EL VERSTUYFT, JG CARLSON, EL EPSTEIN, CJ TI FATTY STREAK FORMATION IN FAT-FED MICE EXPRESSING HUMAN COPPER-ZINC SUPEROXIDE-DISMUTASE (CUZN-SOD) SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF SAN FRANCISCO,SAN FRANCISCO,CA 94143. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 1090 EP 1090 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48001084 ER PT J AU SUPERKO, HR ORR, JR KRAUSS, RM AF SUPERKO, HR ORR, JR KRAUSS, RM TI REDUCTION OF SMALL, DENSE LDL BY GEMFIBROZIL IN LDL SUBCLASS PATTERN-B SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 1194 EP 1194 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48001188 ER PT J AU WILLIAMS, PT AF WILLIAMS, PT TI DECREASED HYPERTENSION AND HYPERLIPIDEMIA IN MALE RUNNERS - EVIDENCE FOR A DOSE-RESPONSE RELATIONSHIP FROM THE NATIONAL RUNNERS HEALTH STUDY SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 1479 EP 1479 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48001468 ER PT J AU DREON, DM KRAUSS, RM AF DREON, DM KRAUSS, RM TI DIFFERENTIAL BENEFIT OF REDUCED FAT INTAKE ON LIPOPROTEIN PROFILES IN SUBJECTS WITH SMALL VERSUS LARGE LOW-DENSITY LIPOPROTEINS IS GREATER WITH 20-PERCENT THAN 30-PERCENT FAT SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 1665 EP 1665 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48001654 ER PT J AU TRIBBLE, DL CHU, BM DREON, DM KRAUSS, RM AF TRIBBLE, DL CHU, BM DREON, DM KRAUSS, RM TI DIFFERENCES IN OXIDATIVE SUSCEPTIBILITY BETWEEN LDL SUBFRACTIONS PERSIST ON 3 DIETS OF DIFFERING FAT-CONTENT AND COMPOSITION SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 1679 EP 1679 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48001668 ER PT J AU BARBAGALLO, CM FAN, JL TAYLOR, JM KRAUSS, RM AF BARBAGALLO, CM FAN, JL TAYLOR, JM KRAUSS, RM TI TRIGLYCERIDE-RICH LIPOPROTEIN SUBFRACTIONS IN CHOLESTEROL-FED TRANSGENIC RABBITS OVEREXPRESSING HUMAN HEPATIC LIPASE OR APOE SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. UNIV CALIF SAN FRANCISCO,GLADSTONE INST,SAN FRANCISCO,CA 94143. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 2361 EP 2361 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002344 ER PT J AU FORTE, TM BIELICKI, JK KNOFF, L MCCALL, MR AF FORTE, TM BIELICKI, JK KNOFF, L MCCALL, MR TI PRECURSOR-PRODUCT RELATIONSHIPS BETWEEN DISCRETE NASCENT APO A-I-CONTAINING PARTICLES ASSEMBLED IN CHINESE-HAMSTER OVARY CELL-CULTURE MEDIUM SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 2657 EP 2657 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002639 ER PT J AU BIELICKI, JK STOLTZFUS, LJ HAR, UH MCCALL, MR RUBIN, EM FORTE, TM AF BIELICKI, JK STOLTZFUS, LJ HAR, UH MCCALL, MR RUBIN, EM FORTE, TM TI APOLIPOPROTEIN A-I-MILANO REDUCES NASCENT-HDL PARTICLE-SIZE AND HAS A LIMITED CAPACITY TO RECRUIT MEMBRANE CHOLESTEROL FROM CHINESE-HAMSTER OVARY CELLS SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 2658 EP 2658 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002640 ER PT J AU BIELICKI, JK STOLTZFUS, LJ MCCALL, MR FORTE, TM RUBIN, EM AF BIELICKI, JK STOLTZFUS, LJ MCCALL, MR FORTE, TM RUBIN, EM TI HDL PARTICLE-SIZE RESTRICTION AND IMPAIRED CHOLESTERYL ESTER FORMATION IN APOLIPOPROTEIN A-I-MILANO TRANSGENIC MICE SO CIRCULATION LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 2660 EP 2660 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002642 ER PT J AU WILLIAMS, PT MOUSSA, D AF WILLIAMS, PT MOUSSA, D TI WOMEN RUNNERS SHOW IMPROVEMENTS IN PLASMA HDL-CHOLESTEROL AND ADIPOSITY AT HIGHER EXERCISE LEVELS THAN CURRENTLY RECOMMENDED SO CIRCULATION LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 2956 EP 2956 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002936 ER PT J AU ZYSOW, BR KAUSER, K LAWN, RM FRAZER, KA RUBIN, ER RUBANYI, G AF ZYSOW, BR KAUSER, K LAWN, RM FRAZER, KA RUBIN, ER RUBANYI, G TI ESTROGEN AND TAMOXIFEN REGULATION OF APOLIPOPROTEIN (A) GENE-EXPRESSION IN AN APOLIPOPROTEIN (A) TRANSGENIC MOUSE MODEL SO CIRCULATION LA English DT Meeting Abstract C1 STANFORD UNIV,STANFORD,CA 94305. BERLEX BIOSCI,RICHMOND,CA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD OCT 15 PY 1995 VL 92 IS 8 SU S BP 3012 EP 3012 PG 1 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA TB480 UT WOS:A1995TB48002992 ER PT J AU LEE, HS KURTZ, SR FLORO, JA STRANE, J SEAGER, CH LEE, SR JONES, ED NELSON, JF MAYER, T PICRAUX, ST AF LEE, HS KURTZ, SR FLORO, JA STRANE, J SEAGER, CH LEE, SR JONES, ED NELSON, JF MAYER, T PICRAUX, ST TI OPTICAL CHARACTERIZATION OF SI1-XCX/SI(0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.014) SEMICONDUCTOR ALLOYS SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS LA English DT Article DE PHOTOLUMINESCENCE; SIC ALLOYS; SI SUBSTRATE; SPECTROSCOPIC ELLIPSOMETRY; HYDROGEN PASSIVATION ID MOLECULAR-BEAM EPITAXY; UNIAXIAL STRESS; SILICON AB We have characterized the optical properties of heteroepitexial Si1-xCx/Si(0 less than or equal to x less than or equal to 0.014) alloys grown on Si substrates by solid phase epitaxy using spectroscopic ellipsometry and photoluminescence. The measured dielectric function confirms that the samples are of good crystalline quality. The 14-K photoluminescence spectra of Si1-xCx/Si show several defect peaks. After hydrogen passivation, we observed a new peak near 1.15-1.17 eV which in creases in energy with the incorporation of carbon. We tentatively assign this peak to the no-phonon peak of the Si1-xCx epi-layer. We discuss the alloy shift of the observed spectroscopic features in terms of the C-induced change in the Si indirect band gap. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 17 TC 11 Z9 11 U1 0 U2 1 PU JAPAN J APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG 24-8 SHINBASHI 4-CHOME, MINATO-KU TOKYO 105, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 2 JI Jpn. J. Appl. Phys. Part 2 - Lett. PD OCT 15 PY 1995 VL 34 IS 10B BP L1340 EP L1343 PG 4 WC Physics, Applied SC Physics GA TB622 UT WOS:A1995TB62200008 ER PT J AU NAKANISHI, H WADA, K WALUKIEWICZ, W AF NAKANISHI, H WADA, K WALUKIEWICZ, W TI PHOTOREFLECTANCE STUDY ON THE BEHAVIOR OF PLASMA-INDUCED DEFECTS DEACTIVATING SI DONORS IN GAAS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FERMI LEVEL; SILICON; SURFACES; SEMICONDUCTORS; DAMAGE; GAP AB The behavior of Ar plasma-induced defects deactivating Si donors in GaAs has been studied. We have applied photoreflectance spectroscopic analysis combined with stepwise wet etching to the depth profiling of defects and succeeded in determining the concentrations and profiles of defects in the sub-surface layer for the first time. We found that the point defects responsible for deactivation undergo electronically enhanced diffusion under the circumstance of photoexcited carriers, demonstrating that the ultraviolet light from plasma is a cause of the deep penetration of defects far beyond the stopping range of ions. We also found that the generation of these point defects is enhanced by photoexcited carriers and that diffusing point defects are trapped by the background defects or impurities, forming immobile complexes. We propose a model in which self-interstitials are the most probable point defects responsible for deactivation. (C) 1995 American Institute of Physics. C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA. RP NAKANISHI, H (reprint author), NIPPON TELEGRAPH & TEL PUBL CORP, LSI LABS, 3-1 MORINOSATO WAKAMIYA, ATSUGI, KANAGAWA 24301, JAPAN. NR 27 TC 16 Z9 16 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD OCT 15 PY 1995 VL 78 IS 8 BP 5103 EP 5108 DI 10.1063/1.359742 PG 6 WC Physics, Applied SC Physics GA RY396 UT WOS:A1995RY39600045 ER PT J AU MORELL, G KATIYAR, RS WEISZ, SZ JIA, H SHINAR, J BALBERG, I AF MORELL, G KATIYAR, RS WEISZ, SZ JIA, H SHINAR, J BALBERG, I TI RAMAN-STUDY OF THE NETWORK DISORDER IN SPUTTERED AND GLOW-DISCHARGE A-SI-H FILMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HYDROGENATED AMORPHOUS-SILICON; OPTICAL-ABSORPTION EDGE; STRUCTURAL ORDER; GE; SCATTERING; GERMANIUM; DENSITY AB We have carried out a comprehensive study of the Raman spectra of a-Si:H films produced by the glow discharge (GD) and radio frequency sputtering (RFS) deposition techniques. The results show that the short-range disorder (bond-angle deviation), as measured by the width of the TO band (T-TO), is larger in RFS than in GD Q-Si:H films. The intermediate-range disorder (dihedral angle deviation), as measured by the ratio of the intensity of the TA band to that of the TO band (I-TA/I-TO)r is generally larger in RFS than in GD a-Si:H films. However, while the I-TA/I-TO values of RFS films remain relatively close to those of GD films when the interior is probed, the near surface of RFS films shows much larger values evidencing the existence of a significant disorder gradient along the growth axis. Together, these results indicate that the network order and homogeneity of RFS amorphous silicon is lower than those of GD for substrate temperatures that produce the hydrogenated material. These structural differences are interpreted in terms of the differences between the two film growth processes and are believed to be the reason for the poorer transport properties of RFS a-Si:H-films. (C) 1995 American Institute of Physics. C1 UNIV PUERTO RICO,DEPT PHYS,SAN JUAN,PR 00931. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. RP MORELL, G (reprint author), UNIV PUERTO RICO,COLL GEN STUDIES,DEPT PHYS SCI,SAN JUAN,PR 00931, USA. RI Morell, Gerardo/H-6300-2011 OI Morell, Gerardo/0000-0003-4787-2239 NR 33 TC 46 Z9 49 U1 2 U2 7 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 OCT 15 PY 1995 VL 78 IS 8 BP 5120 EP 5125 DI 10.1063/1.359743 PG 6 WC Physics, Applied SC Physics GA RY396 UT WOS:A1995RY39600047 ER PT J AU BOETTGER, JC FURNISH, MD DEY, TN GRADY, DE AF BOETTGER, JC FURNISH, MD DEY, TN GRADY, DE TI TIME-RESOLVED SHOCK-WAVE EXPERIMENTS ON GRANITE AND NUMERICAL SIMULATIONS USING DYNAMIC PHASE MIXING SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PROPAGATION; QUARTZ AB A recently developed model for simulating the dynamic behavior of silicate materials is applied to the loading and unloading properties of granite. Four time-resolved wave profile measurements on granite are presented and used to supplement Hugoniot data to constrain the model. This model is based on a dynamic process-dependent description of phase mixing. In the solid-solid mixed-phase region, the loading states are determined from a simple two-parameter constraint equation which relates the mass fraction of the high pressure phase lambda to the Gibbs free-energy difference between the phases Delta G. On release, the reverse phase transition is modeled as a two-stage transition with each stage described by a two-parameter equation with the same form as the loading equation. In all four of the simulations, the loading behavior of the shock-wave experiment is well represented. For three of the experiments the release behavior is accurately simulated up to the point at which the measured interface speed reaches its first minimum. For the remaining experiment the simulation matches only the earliest release behavior and then rapidly deviates from the measured data. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP BOETTGER, JC (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 31 TC 3 Z9 3 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD OCT 15 PY 1995 VL 78 IS 8 BP 5155 EP 5165 DI 10.1063/1.359748 PG 11 WC Physics, Applied SC Physics GA RY396 UT WOS:A1995RY39600052 ER PT J AU ZOLLNER, S AF ZOLLNER, S TI THEORY OF OPTICAL INTERBAND-TRANSITIONS IN STRAINED SI1-YCY GROWN PSEUDOMORPHICALLY ON SI(001) SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID 1ST-PRINCIPLES ELECTRONIC-STRUCTURE; SILICON; GE; ELECTROREFLECTANCE; ALLOYS; GAAS; ZNSE; GAP AB Recently W. Kissinger, M. Weidner, H. J. Osten, and M. Eichler [Appl. Phys. Lett. 65, 3356 (1994)] reported ellipsometry and electroreflectance measurements on the E(0)', E(1), and E(2) critical point energies in strained Si1-yCy alloys grown pseudomorphically on Si (001) using molecular-beam epitaxy. We present a theory explaining these energies using established deformation-potential theory and interpret the results and their implications for the band structure of these alloys. (C) 1995 American Institute of Physics. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP ZOLLNER, S (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. RI Zollner, Stefan/B-4858-2012 OI Zollner, Stefan/0000-0001-7752-7941 NR 21 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD OCT 15 PY 1995 VL 78 IS 8 BP 5209 EP 5211 DI 10.1063/1.359696 PG 3 WC Physics, Applied SC Physics GA RY396 UT WOS:A1995RY39600068 ER PT J AU CORRAL, R JIMENEZ, J AF CORRAL, R JIMENEZ, J TI FOURIER/CHEBYSHEV METHODS FOR THE INCOMPRESSIBLE NAVIER-STOKES EQUATIONS IN INFINITE DOMAINS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID NUMERICAL-SIMULATION; TURBULENCE; TRANSITION; LAYER; FLOW AB A fully spectral numerical scheme is presented for the unsteady, high Reynolds number, incompressible Navier-Stokes equations, in domains which are infinite or semi-infinite in one dimension. The domain is not mapped, and standard Fourier or Chebyshev expansions can be used. The handling of the infinite domain does not introduce any significant overhead. The scheme assumes that the vorticity in the flow is essentially concentrated in a finite region, which is represented numerically by standard spectral collocation methods, To accommodate the slow exponential decay of the velocities at infinity, extra expansion functions are introduced, which are handled analytically. A detailed error analysis is presented, and two applications to direct numerical simulation of turbulent flows are discussed in relation with the numerical performance of the scheme. (C) 1995 Academic Press, Inc. C1 NASA,AMES RES CTR,AMES,IA. STANFORD UNIV,CTR TURBULENCE RES,STANFORD,CA 94305. RP CORRAL, R (reprint author), UNIV POLITECN MADRID,SCH AERONAUT,PL CARDENAL CISNEROS 3,E-28040 MADRID,SPAIN. RI jimenez, javier/A-6691-2008 OI jimenez, javier/0000-0003-0755-843X NR 13 TC 13 Z9 13 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 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD OCT 15 PY 1995 VL 121 IS 2 BP 261 EP 270 DI 10.1016/S0021-9991(95)90085-3 PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA RZ315 UT WOS:A1995RZ31500005 ER PT J AU NADIGA, BT AF NADIGA, BT TI AN ADAPTIVE DISCRETE-VELOCITY MODEL FOR THE SHALLOW-WATER EQUATIONS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID HYDRODYNAMICS; FLUIDS AB A new approach to solving the shallow water equations is presented. This involves using discrete velocities of an adaptive nature in a finite volume context. The origin of the discrete-velocity space and the magnitudes of the discrete-velocities are both spatially and temporally variable. The near-equilibrium flow method of Nadiga and Pullin is used to arrive at a robust second-order (in both space and time) scheme-the adaptive discrete velocity (ADV) scheme-which captures hydraulic jumps with no oscillations. The flow over a two-dimensional ridge, over a wide range of undisturbed upstream Froude numbers prove the robustness and accuracy of the scheme. A comparison of the interaction of two circular vortex patches in the presence of bottom topography as obtained by the ADV scheme and a semi-Lagrangian scheme more than validates the new scheme in two dimensions. (C) 1995 Academic Press. Inc. C1 LOS ALAMOS NATL LAB, CNLS, LOS ALAMOS, NM 87545 USA. RP LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. NR 19 TC 8 Z9 10 U1 1 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD OCT 15 PY 1995 VL 121 IS 2 BP 271 EP 280 DI 10.1016/S0021-9991(95)90102-7 PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA RZ315 UT WOS:A1995RZ31500006 ER PT J AU SONNENDRUCKER, E AMBROSIANO, JJ BRANDON, ST AF SONNENDRUCKER, E AMBROSIANO, JJ BRANDON, ST TI A FINITE-ELEMENT FORMULATION OF THE DARWIN PIC MODEL FOR USE ON UNSTRUCTURED GRIDS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID MAXWELL EQUATIONS; APPROXIMATION AB In this paper we introduce a new formulation of the Darwin approximation of Maxwell's equations and discuss its domain of applicability. We describe our finite element implementation of this model, allowing the use of unstructured grids, and its coupling with a PIC method for the particles. (C) 1995 Academic Press, Inc. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RP SONNENDRUCKER, E (reprint author), CEA,CTR ETUD LIMEIL VALENTON,F-94195 VILLENEUVE ST GEO,FRANCE. NR 21 TC 14 Z9 14 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 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD OCT 15 PY 1995 VL 121 IS 2 BP 281 EP 297 DI 10.1016/S0021-9991(95)90119-1 PG 17 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA RZ315 UT WOS:A1995RZ31500007 ER PT J AU HECHT, MW HOLLAND, WR RASCH, PJ AF HECHT, MW HOLLAND, WR RASCH, PJ TI UPWIND-WEIGHTED ADVECTION SCHEMES FOR OCEAN TRACER TRANSPORT - AN EVALUATION IN A PASSIVE TRACER CONTEXT SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS LA English DT Article ID CONSERVATIVE DIFFERENCE SCHEME; GENERAL-CIRCULATION MODELS; ALGORITHM; FLUIDS AB Centered-in-space, centered-in-time integration has generally been used for the advection of scalars in ocean models. An assessment is made of the implications of centered leapfrog integration in the context of two-dimensional passive tracer advection within a Stommel (1948) gyre. Nonphysical ripples in the tracer field grow to alarming levels in purely advective integrations. Diffusive parameterizations of eddy mixing moderate these ripples, but it is found that Laplacian diffusion greatly reduces the peak amplitude of the tracer field, while biharmonic or weaker Laplacian diffusion allows ripples of large amplitude. Several forward-in-time, upwind-weighted schemes are found to provide better solutions. Smolarkiewicz's (1984) Multi-Dimensional Positive-Definite Advection and Transport Algorithm (MPDATA) scheme is slightly superior for an integration at moderate resolution within which the western boundary current is poorly resolved in typical fashion. Third-order, upwind-based schemes exhibit little sensitivity to the details of multidimensional treatment for this problem of passive tracer advection, with results nearly as good as for MPDATA. C1 NATL CTR ATMOSPHER RES,BOULDER,CO 80307. RP HECHT, MW (reprint author), LOS ALAMOS NATL LAB,INST GEOPHYS & PLANETARY PHYS,MAIL STOP C305,NM 87545,LOS ALAMOS,NM 87545, USA. NR 25 TC 40 Z9 41 U1 1 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES-OCEANS JI J. Geophys. Res.-Oceans PD OCT 15 PY 1995 VL 100 IS C10 BP 20763 EP 20778 DI 10.1029/95JC01813 PG 16 WC Oceanography SC Oceanography GA TA726 UT WOS:A1995TA72600019 ER PT J AU HULL, EL PEHL, RH MADDEN, NW LUKE, PN CORK, CP MALONE, DL XING, JS KOMISARCIK, K VANDERWERP, JD FRIESEL, DL AF HULL, EL PEHL, RH MADDEN, NW LUKE, PN CORK, CP MALONE, DL XING, JS KOMISARCIK, K VANDERWERP, JD FRIESEL, DL TI TEMPERATURE SENSITIVITY OF SURFACE CHANNEL EFFECTS ON HIGH-PURITY GERMANIUM DETECTORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The temperature sensitivity of surface channel effects on planar high-purity germanium detectors was measured using 60-keV gamma-ray scanning techniques, as part of a radiation damage study. When measured in this manner, the surface effects on most detectors showed extreme temperature sensitivity in the 72-95 It region. The effect of the surface channel increased with increasing temperature to such an extent that the efficiency, as measured by the count rate in the 1332-keV peak from a Co-60 source, decreased by a factor of over two in some cases. Since the peak efficiency for the 1332-keV gamma ray decreased as the temperature increased throughout the operating range (72-120 K) the effect of the surface channel must continue to increase beyond the temperature (95 K) at which the 60-keV scan loses its sensitivity because of the strong attenuation of these much lower energy gamma rays. Radiation damage had no measurable effect on the surface characteristics. No correlation between the surface effects and the resolution changes of the 1332-keV peak was observed. C1 INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47408. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 11 TC 12 Z9 12 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 OCT 15 PY 1995 VL 364 IS 3 BP 488 EP 495 DI 10.1016/0168-9002(95)00339-8 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RZ517 UT WOS:A1995RZ51700008 ER PT J AU DASILVA, A PRITYCHENKO, B SMITH, A LANOU, RE SADOULET, B AF DASILVA, A PRITYCHENKO, B SMITH, A LANOU, RE SADOULET, B TI IDENTIFICATION AND SUPPRESSION OF LOW-ENERGY BACKGROUND FROM PB-210 CONTAMINATION IN LEAD SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter AB The importance of (210)pb as a potential background source, particularly at low energies, is clearly demonstrated by both measurements and Monte Carlo simulations, A method for effectively suppressing this background source is also demonstrated. C1 UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER,BC,CANADA. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA. BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP DASILVA, A (reprint author), UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. NR 4 TC 9 Z9 9 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 OCT 15 PY 1995 VL 364 IS 3 BP 578 EP 580 DI 10.1016/0168-9002(95)00600-1 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RZ517 UT WOS:A1995RZ51700019 ER PT J AU YAMAOKA, H FREUND, AK HOLMBERG, J ROSSAT, M WULFF, M HANFLAND, M LEE, WK MILLS, DM AF YAMAOKA, H FREUND, AK HOLMBERG, J ROSSAT, M WULFF, M HANFLAND, M LEE, WK MILLS, DM TI FIRST HIGH HEAT LOAD EXPERIENCE WITH A CRYOGENICALLY COOLED DIAMOND X-RAY MONOCHROMATOR CRYSTAL SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter C1 EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE. ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. RP YAMAOKA, H (reprint author), RIKEN,INST PHYS & CHEM RES,SPRING 8 PROJECT TEAM,WAKO,SAITAMA 35001,JAPAN. NR 19 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 OCT 15 PY 1995 VL 364 IS 3 BP 581 EP 584 DI 10.1016/0168-9002(95)00472-6 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA RZ517 UT WOS:A1995RZ51700020 ER PT J AU RATOWSKY, RP YANG, L DERI, RJ KALLMAN, JS TROTT, G AF RATOWSKY, RP YANG, L DERI, RJ KALLMAN, JS TROTT, G TI BALL LENS REFLECTIONS BY DIRECT SOLUTION OF MAXWELLS EQUATIONS SO OPTICS LETTERS LA English DT Article ID GAUSSIAN-BEAM; SCATTERING; SPHERE AB We calculate ball lens reflections, using the exact solution of Maxwell's equations for the scattering of a beam from a dielectric sphere. Our results are consistent to within 1 dB with measurements of backreflection to a single-mode fiber. We also calculate backreflection to an astigmatic spot laser diode. (C) 1995 Optical Society of America C1 HEWLETT PACKARD LABS,PALO ALTO,CA 94303. RP RATOWSKY, RP (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 14 TC 11 Z9 11 U1 0 U2 1 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD OCT 15 PY 1995 VL 20 IS 20 BP 2048 EP 2050 DI 10.1364/OL.20.002048 PG 3 WC Optics SC Optics GA RY840 UT WOS:A1995RY84000004 PM 19862246 ER PT J AU ACEVES, AB DEANGELIS, C LUTHER, GG RUBENCHIK, AM TURITSYN, SK AF ACEVES, AB DEANGELIS, C LUTHER, GG RUBENCHIK, AM TURITSYN, SK TI ALL-OPTICAL-SWITCHING AND PULSE AMPLIFICATION AND STEERING IN NONLINEAR FIBER ARRAYS SO PHYSICA D LA English DT Article; Proceedings Paper CT Conference on the Nonlinear Schrodinger Equation CY JUL 25-AUG 03, 1994 CL LANDAU INST THEORET PHYS, CHERNOGOLOVKA, RUSSIA HO LANDAU INST THEORET PHYS ID MODULATIONAL INSTABILITY; COUPLER; SOLITON; CHAINS; MODES AB The dynamics of pulses propagating in an array of linearly coupled optical fibers shows universal localization phenomena. Here we demonstrate why this happens, the characteristic properties of the localized modes and their applicability in nonlinear optical devices. C1 LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA 94550. UNIV DUSSELDORF,INST THEORET PHYS 1,D-40225 DUSSELDORF,GERMANY. RUSSIAN ACAD SCI,INST AUTOMAT & ELECTROMETRY,NOVOSIBIRSK 630090,RUSSIA. RP ACEVES, AB (reprint author), 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 30 TC 27 Z9 27 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD OCT 15 PY 1995 VL 87 IS 1-4 BP 262 EP 272 DI 10.1016/0167-2789(95)00123-L PG 11 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA TB226 UT WOS:A1995TB22600033 ER PT J AU LIU, F AF LIU, F TI SELF-CONSISTENT TIGHT-BINDING METHOD SO PHYSICAL REVIEW B LA English DT Note ID MOLECULAR-DYNAMICS; ELECTRONIC-STRUCTURE; DENSITY-MATRIX; SILICON; PARAMETERS; CLUSTERS; MODEL; SI AB A self-consistent tight-binding formalism is described. The self-consistency is achieved by the introduction of a chemical hardness matrix and a generalization of the Huckel model to make the tight-binding Hamiltonian an implicit functional of the charge density. Studies of the band structures of diamond and face-centered cubic Si demonstrate that the method has very good transferability and shows promise for applications to systems involving large charge transfer. Also, the method can easily be implemented to study spin-polarized systems. RP LIU, F (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. NR 24 TC 18 Z9 19 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 OCT 15 PY 1995 VL 52 IS 15 BP 10677 EP 10680 DI 10.1103/PhysRevB.52.10677 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200004 ER PT J AU GUO, JH GLANS, P SKYTT, P WASSDAHL, N NORDGREN, J LUO, Y AGREN, H MA, Y WARWICK, T HEIMANN, P ROTENBERG, E DENLINGER, JD AF GUO, JH GLANS, P SKYTT, P WASSDAHL, N NORDGREN, J LUO, Y AGREN, H MA, Y WARWICK, T HEIMANN, P ROTENBERG, E DENLINGER, JD TI RESONANT EXCITATION X-RAY-FLUORESCENCE FROM C-60 SO PHYSICAL REVIEW B LA English DT Note ID ELECTRONIC-STRUCTURE; SOLID C-60; SYNCHROTRON RADIATION; EMISSION SPECTRA; C60; CARBON; PHOTOEMISSION; SPECTROSCOPY; ENERGY; STATES AB X-ray fluorescence of condensed C-60 has been recorded in high resolution using monochromatic synchrotron radiation excitation. Strong intensity modulation of constituent spectral features is observed with varying excitation energy up to 10 eV above threshold. The energy dependence is interpreted as due to resonant inelastic x-ray scattering, leading to symmetry selection rules governing the two-photon process in the fully symmetric molecule. C1 LINKOPING UNIV, DEPT PHYS & MEASUREMENT TECHNOL, S-58183 LINKOPING, SWEDEN. UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. UNIV OREGON, DEPT PHYS, EUGENE, OR 97403 USA. UNIV WISCONSIN, DEPT PHYS, MILWAUKEE, WI 53211 USA. RP GUO, JH (reprint author), UPPSALA UNIV, DEPT PHYS, BOX 530, S-75121 UPPSALA, SWEDEN. RI Rotenberg, Eli/B-3700-2009; Luo, Yi/B-1449-2009; Agren, Hans/H-7715-2016 OI Rotenberg, Eli/0000-0002-3979-8844; Luo, Yi/0000-0003-0007-0394; NR 34 TC 35 Z9 35 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 OCT 15 PY 1995 VL 52 IS 15 BP 10681 EP 10684 DI 10.1103/PhysRevB.52.10681 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200005 ER PT J AU DELPENNINO, U SALVARANI, B COMPANO, R PANKRATOV, O AF DELPENNINO, U SALVARANI, B COMPANO, R PANKRATOV, O TI EVIDENCE OF A BIPOLARONIC, INSULATING STATE OF NA SUBMONOLAYER ON GAAS(110) SO PHYSICAL REVIEW B LA English DT Note ID ELECTRONIC-PROPERTIES; CHARGE-TRANSFER; SURFACE; PHOTOEMISSION; CS/GAAS(110); ADSORPTION; METALS; MODEL AB We present electron-energy-loss-spectroscopy results for the Na/GaAs(110) ultrathin interface. The data do not show the loss features commonly found for Cs, K, and Rb overlayers, which are considered to be the fingerprints of a Mott-Hubbard insulating state of the interface. In photoemission we observe a distinct Na-induced surface state, appearing at a coverage of about 0.25 ML, which disappears approaching the complete monolayer. We interpret our results on the basis of the bipolaron model which suggests that insulating character of the interface originates from the ''negative-U'' behavior of the surface state. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP DELPENNINO, U (reprint author), UNIV MODENA,IST NAZL FIS MAT,DIPARTIMENTO FIS,VIA CAMPI 213-A,I-41100 MODENA,ITALY. RI Pankratov, Oleg/C-5553-2013; Del Pennino, Umberto/L-1454-2016 OI Del Pennino, Umberto/0000-0001-9484-1449 NR 18 TC 14 Z9 14 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 15 BP 10717 EP 10720 DI 10.1103/PhysRevB.52.10717 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200014 ER PT J AU EILES, TM SIMMONS, JA SHERWIN, ME KLEM, JF AF EILES, TM SIMMONS, JA SHERWIN, ME KLEM, JF TI MAGNETIC FOCUSING IN PARALLEL QUANTUM POINT CONTACTS SO PHYSICAL REVIEW B LA English DT Note ID DIMENSIONAL ELECTRON-GAS; CHANNELS AB Using an air-bridged gate, we have fabricated two closely spaced parallel quantum point contacts (QPC's) in a GaAs-AlxGa1-xAs heterostructure. By biasing the gates appropriately, we have measured the magnetoresistance (MR) at low fields for both single and parallel point contacts. Assuming a parabolic potential, the MR of a single QPC can be quantitatively understood by a previous theory incorporating magnetic-field-suppressed backscattering. However, the MR of two QPC's in parallel displays resistance peaks, implying a failure of Ohm's law due to coupling between the channels. These resistance peaks are shown to be due to magnetic focusing of electrons from one channel into the other. RP EILES, TM (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 16 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 15 BP 10756 EP 10759 DI 10.1103/PhysRevB.52.10756 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200024 ER PT J AU DEHAAN, VO VANWELL, AA ADENWALLA, S FELCHER, GP AF DEHAAN, VO VANWELL, AA ADENWALLA, S FELCHER, GP TI RETRIEVAL OF PHASE INFORMATION IN NEUTRON REFLECTOMETRY SO PHYSICAL REVIEW B LA English DT Note AB Neutron reflectometry can determine unambiguously the chemical depth profile of a thin film if both phase and amplitude of the reflectance are known. The recovery of the phase information is achieved by adding to the unknown layered structure a known ferromagnetic layer. The ferromagnetic layer is magnetized by an external magnetic field in a direction lying in the plane of the layer and subsequently perpendicular to it. The neutrons are polarized either parallel or opposite to the magnetic field. In this way three measurements can be made, with different (and known) scattering-length densities of the ferromagnetic layer. The reflectivity obtained from each measurement can be represented by a circle in the (complex) reflectance plane. The intersections of these circles provide the reflectance. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP DEHAAN, VO (reprint author), DELFT UNIV TECHNOL,INTERFAC REACTOR INST,MEKELWEG 15,2629 JB DELFT,NETHERLANDS. NR 18 TC 52 Z9 53 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 OCT 15 PY 1995 VL 52 IS 15 BP 10831 EP 10833 DI 10.1103/PhysRevB.52.10831 PG 3 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200043 ER PT J AU BUSCH, K SOUKOULIS, CM ECONOMOU, EN AF BUSCH, K SOUKOULIS, CM ECONOMOU, EN TI TRANSPORT VELOCITY IN 2-DIMENSIONAL RANDOM-MEDIA SO PHYSICAL REVIEW B LA English DT Article ID PHOTONIC BAND-STRUCTURE; 2-DIMENSIONAL SQUARE; DIFFUSION CONSTANT; CLASSICAL WAVES; 2 DIMENSIONS; PROPAGATION; LATTICES; SPEED; GAPS AB We study the transport properties of a two-dimensional randomly disordered dielectric medium. The medium consists of infinitely long dielectric cylinders with a real dielectric constant epsilon(a), embedded in a different dielectric medium with epsilon(b) = 1. The transport velocity is calculated within the low-density approximation of the Bethe-Salpeter equation and within the coated extension of the well-known coherent-potential approximation for a random arrangement of dielectric cylinders. Results for the long-wavelength effective dielectric constant, phase velocity, and transport velocity are presented for both the s and p polarization of electromagnetic waves. In addition, it is found that localization is achieved more easily for the s than for the p polarization. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. FDN RES & TECHNOL HELLAS,RES CTR CRETE,CRETE,GREECE. UNIV CRETE,DEPT PHYS,GR-71110 CRETE,GREECE. RP BUSCH, K (reprint author), UNIV KARLSRUHE,INST THEORIE KONDENSIERTEN MAT,D-76128 KARLSRUHE,GERMANY. RI Economou, Eleftherios /E-6374-2010; Soukoulis, Costas/A-5295-2008 NR 31 TC 7 Z9 8 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 OCT 15 PY 1995 VL 52 IS 15 BP 10834 EP 10840 DI 10.1103/PhysRevB.52.10834 PG 7 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200044 ER PT J AU ZHANG, QM LARESE, JZ AF ZHANG, QM LARESE, JZ TI FREEZING TRANSITIONS AND ORDER-DISORDER PROCESSES IN MULTILAYER XENON FILMS ON GRAPHITE SO PHYSICAL REVIEW B LA English DT Article ID ARGON FILMS; LAYERING TRANSITIONS; NEUTRON-DIFFRACTION; PHASE-TRANSITIONS; ADSORPTION; GROWTH AB Combined results from simultaneous x-ray scattering and vapor-pressure isotherm measurements of multilayer xenon on graphite show directly that the first-order growth steps which reappear at temperatures above the layering critical point (T-c) represent transitions from a film of (n - 1) layers of solid plus one layer of fluid to an n-layer solid. The data also indicate that the disordering process of films above T-c involves more than just the topmost layer. The interplay between the disordering of the top layer and its coupling to the underneath layers produces interesting disordering and reordering processes as the temperature is raised. RP ZHANG, QM (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 24 TC 4 Z9 4 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 15 BP 11335 EP 11338 DI 10.1103/PhysRevB.52.11335 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200100 ER PT J AU JACOBSEN, FM RAAEN, S RUCKMAN, MW STRONGIN, M AF JACOBSEN, FM RAAEN, S RUCKMAN, MW STRONGIN, M TI OXIDATION OF METAL-SURFACES AT 15 K - THE QUANTUM NATURE OF OXIDATION SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-SPECTROSCOPY; CHEMICAL-ANALYSIS; INITIAL-STAGES; AL(111); NB; TEMPERATURE; GROWTH; OXYGEN; TA AB Studies of Ta oxidation at 15 K clearly show the formation of distinct oxide species with increasing O-2 exposure, beginning with the most metal-rich species and concluding with the formation of the bulk oxide and the buildup of a potential across the oxide layer. The formation of this sequence in a diffusionless regime is consistent with electron tunneling leading to local potentials that allow atomic motion at low temperatures. This potential finally develops into the collective Mott potential across the layer. RP JACOBSEN, FM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. OI Raaen, Steinar/0000-0001-5565-0690 NR 25 TC 6 Z9 6 U1 1 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 OCT 15 PY 1995 VL 52 IS 15 BP 11339 EP 11342 DI 10.1103/PhysRevB.52.11339 PG 4 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200101 ER PT J AU DUNPHY, JC SAUTET, P OGLETREE, DF SALMERON, M AF DUNPHY, JC SAUTET, P OGLETREE, DF SALMERON, M TI APPROACH TO SURFACE-STRUCTURE DETERMINATION WITH THE SCANNING TUNNELING MICROSCOPE - MULTIPLE-GAP IMAGING AND ELECTRON-SCATTERING QUANTUM-CHEMISTRY THEORY SO PHYSICAL REVIEW B LA English DT Article ID METAL-SURFACES; STM IMAGES; ATOM; SULFUR; ADSORBATES; MO(100) AB We have successfully developed and tested a method of quantitative surface structure determination using scanning tunneling microscopy (STM). Image simulations of the c(2X2) S on Mo(100) chemisorption system were calculated as a function of surface and tip structure using electron-scattering quantum-chemistry STM theory. STM images with a wide range of tunneling gap resistance values were acquired in a ''multiple-gap'' mode which preserves information on the z separation and lateral registry between the images under different tunneling conditions. The best fit of a numerical comparison of the image simulations with experimental data simultaneously determined two structural parameters of the surface. The STM results differ from those of dynamical LEED by approximately 0.1 Angstrom, which we estimate to be the level of accuracy obtainable with the present implementation of the method. C1 ECOLE NORMALE SUPER LYON,CHIM THEOR LAB,F-69364 LYON,FRANCE. INST RECH CATALYSE,F-69626 VILLEURBANNE,FRANCE. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP DUNPHY, JC (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Sautet, Philippe/G-3710-2014; Ogletree, D Frank/D-9833-2016 OI Sautet, Philippe/0000-0002-8444-3348; Ogletree, D Frank/0000-0002-8159-0182 NR 39 TC 14 Z9 14 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 15 BP 11446 EP 11456 DI 10.1103/PhysRevB.52.11446 PG 11 WC Physics, Condensed Matter SC Physics GA TA852 UT WOS:A1995TA85200113 ER PT J AU MALIK, A DURBIN, MK RICHTER, AG HUANG, KG DUTTA, P AF MALIK, A DURBIN, MK RICHTER, AG HUANG, KG DUTTA, P TI STRUCTURES OF HEADGROUP AND TAIL-GROUP MONOLAYERS IN A LANGMUIR-BLODGETT-FILM SO PHYSICAL REVIEW B LA English DT Note ID LEAD STEARATE; ACID AB We have studied monolayer and multilayer Langmuir-Blodgett films of lead stearate using x-ray diffraction and reflectivity. We show that it is possible to distinguish the scattering due to the head groups from that due to the alkane chains. The second and subsequent alkane monolayers are distorted hexagonal (the first monolayer is known to be hexagonal); successive monolayers are shifted laterally by one-fourth of an in-place lattice spacing, and the chains tilt by similar to 8 degrees towards a nearest neighbor. The lead ion monolayers are also distorted hexagonal; successive monolayers are shifted laterally by a half lattice spacing. From rod scan intensities, we have determined the relative positions of the lead and alkane chain lattices. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP MALIK, A (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 14 TC 34 Z9 34 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 16 BP 11654 EP 11657 PG 4 WC Physics, Condensed Matter SC Physics GA TB966 UT WOS:A1995TB96600028 ER PT J AU MIZUNO, S TOCHIHARA, H BARBIERI, A VANHOVE, MA AF MIZUNO, S TOCHIHARA, H BARBIERI, A VANHOVE, MA TI COMPLETION OF THE STRUCTURAL DETERMINATION OF AND RATIONALIZATION OF THE SURFACE-STRUCTURE SEQUENCE (2X1)-](3X3)-](4X4) FORMED ON CU(001) WITH INCREASING LI COVERAGE SO PHYSICAL REVIEW B LA English DT Note ID ELECTRON DIFFRACTION ANALYSIS; ADSORPTION; AL(111); LEED; SYSTEM; NA AB With increasing Li coverage, the surface structure of Cu(001) evolves as (2x1)-->(3x3)-->(4x4) at room temperature. We here report the detailed structure of the most complex (4x4) phase determined by a dynamical low-energy electron diffraction (LEED) analysis with symmetrized automated tensor LEED. This completes the solution of these structures and allows a rationalization of their formation. The unit cell of the (4x4) structure consists of four Li adatoms forming a square cluster located on top of islands of nine Cu atoms; the islands are separated and joined by rows of substituting Li atoms. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. RP MIZUNO, S (reprint author), HOKKAIDO UNIV,CATALYSIS RES CTR,KITA KU,SAPPORO,HOKKAIDO 060,JAPAN. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 19 TC 29 Z9 29 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD OCT 15 PY 1995 VL 52 IS 16 BP 11658 EP 11661 PG 4 WC Physics, Condensed Matter SC Physics GA TB966 UT WOS:A1995TB96600029 ER EF