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  • Articles  (7)
  • American Institute of Physics (AIP)  (5)
  • American Association for the Advancement of Science (AAAS)  (2)
  • Geological Society of America (GSA)
  • Geological Society of London
  • 2000-2004
  • 1985-1989  (7)
  • 1980-1984
  • 1935-1939
  • 1987  (2)
  • 1986  (5)
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  • Articles  (7)
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  • 2000-2004
  • 1985-1989  (7)
  • 1980-1984
  • 1935-1939
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  • 1
    Electronic Resource
    Electronic Resource
    Formation of silicides by rapid thermal annealing over polycrystalline silicon (1986)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 60 (1986), S. 631-634 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have investigated the formation of titanium silicide by rapid thermal annealing in nitrogen and argon ambients over polycrystalline silicon. A sheet resistance of about 3 Ω per square for a 300-A(ring) Ti layer was achieved after 900 °C/10-s annealing treatment, which decreased to about 2 Ω per square after 1100 °C/10-s treatment. The silicides were found to be stable during rapid thermal annealing up to 1100 °C/10 s with no or negligible migration of titanium along the grain boundaries in polycrystalline silicon. An external layer (titanium rich, mixture of titanium oxide and nitride) was observed to form during rapid thermal annealing treatment in the nitrogen ambient, but the surface remained clean in the argon ambient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.337404
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Population lifetimes of OH(v=1) and OD(v=1) stretching vibrations of alcohols and silanols in dilute solution (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 5004-5018 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Picosecond infrared pump–probe experiments determined the vibrational population lifetimes (T1) of the hydroxyl fundamental stretching mode OH(v=1) in 12 alcohols (R3COH) and 8 silanols (R3SiOH) in dilute room temperature CCl4 solutions. T1 for the silanols is in the range 185〈T1〈292 ps, while T1 for the alcohols is much less (T1〈80 ps). The deuterium-exchanged analogs (COD and SiOD) exhibit population relaxation times similar to protonated hydroxyls. An analysis of the vibrational energy levels corresponding to modes involving the four bonds nearest the hydroxyl groups of these molecules is used to qualitatively explain the trends of the observed T1 lifetimes for these systems. Solution T1 lifetimes are also compared to those previously measured for OH(v=1) on the surface of silica and in other condensed-phase, room temperature systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451690
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  • 3
    Electronic Resource
    Electronic Resource
    Vibrational predissociation of the nitric oxide dimer: Total energy distribution in the fragments (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 2333-2334 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Rotational, spin-orbit, lambda doublet, and kinetic energy distributions were measured by laser-excited fluorescence techniques for the nitric oxide fragments formed from the vibrational predissociation of nitric oxide dimers in a free jet expansion. The NO fragments, produced following excitation in the dimer ν1 fundamental, were described by a rotational "temperature'' of TR(approximately-equal-to)100 K, with full equilibration of lambda doublet states, and approximately equal populations in the two spin-orbit states. The velocity distributions were isotropic with an average fragment kinetic energy of 400 cm−1. Time-resolved measurements placed a 15 ns upper limit on the predissociation lifetime.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451082
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  • 4
    Electronic Resource
    Electronic Resource
    Time-resolved measurements of OH(v=1) vibrational relaxation on SiO2 surfaces: Isotope and temperature dependence (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 2361-2364 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Picosecond infrared spectroscopy was used to measure the vibrational energy relaxation time T1 of OH(v=1) and OD(v=1) groups chemisorbed on silica surfaces over the temperature range 100≤T≤800 K. The observed T1 times and their temperature dependencies are discussed in terms of a multiphonon relaxation mechanism. Limiting low temperature lifetimes are T1=220±20 ps (1σ) for OH(v=1) and T1=149±10 ps for OD(v=1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450350
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  • 5
    Electronic Resource
    Electronic Resource
    Picosecond measurements of the dissociation rates of the nitric oxide dimer v1=1 and v4=1 levels (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 6235-6237 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Direct picosecond measurements of the vibrational predissociation rates of the nitric oxide dimer excited to v=1 levels of the symmetric (ν1=1870 cm−1) and antisymmetric (ν4=1789 cm−1) N–O stretching fundamentals are reported. Lifetimes obtained are 880±260 ps for ν1 and 39±8 ps for ν4 excitations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451494
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  • 6
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    Skeletal muscle as the potential power source for a cardiovascular pump: assessment in vivo (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-04-17
    Description: Skeletal muscle ventricles (SMVs) were constructed from canine latissimus dorsi and connected to a totally implantable mock circulation device. The SMVs, stimulated by an implantable pulse generator, pumped continuously for up to 8 weeks in free-running beagle dogs. Systolic pressures produced by the SMVs, initially of 139 +/- 7.2 mmHg and after 1 month of continuous pumping of 107 +/- 7 mmHg, were comparable to normal physiologic pressures in the adult beagles (114 +/- 21 mmHg). After 2 weeks of continuous pumping, the mean stroke work of the SMVs was 0.4 X 10(6) ergs, a performance that compares favorably with the animal's cardiac ventricles. This study shows that canine skeletal muscle which has not received prior training or electrical conditioning can perform sustained work at the high levels needed for an auxiliary cardiovascular pump. It might be possible eventually to use such muscle pumps in humans to assist the failing circulation and to provide support in children with certain types of congenital heart defects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Acker, M A -- Hammond, R L -- Mannion, J D -- Salmons, S -- Stephenson, L W -- HLBI 34778/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1987 Apr 17;236(4799):324-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2951849" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Animals ; Blood Circulation ; Blood Pressure ; *Cardiovascular Physiological Phenomena ; Dogs ; Kinetics ; Models, Biological ; Muscles/enzymology/*physiology ; Myosins/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Radioactive cesium from the Chernobyl accident in the Greenland Ice Sheet (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-08-07
    Description: Measurements of cesium-134 and cesium-137 in Greenland snow together with models of long-range transport have been used to assess radionuclide deposition in the Arctic after the Chernobyl accident. The results suggest that a well-defined layer of radioactive cesium is now present in polar glaciers, providing a new reference for estimating snow accumulation rates and dating ice core samples.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davidson, C I -- Harrington, J R -- Stephenson, M J -- Monaghan, M C -- Pudykiewicz, J -- Schell, W R -- New York, N.Y. -- Science. 1987 Aug 7;237(4815):633-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3603043" target="_blank"〉PubMed〈/a〉
    Keywords: *Accidents ; *Cesium Radioisotopes ; Greenland ; Models, Theoretical ; *Nuclear Reactors ; *Radioactive Fallout ; Snow ; Ukraine
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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