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  • 2020-2022  (29)
  • 1985-1989  (162)
  • 1955-1959  (29)
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  • 1
    Call number: SR 90.0009(283)
    In: Memoir
    Type of Medium: Series available for loan
    Pages: VII, 52 S. + 3 Kt.-Beil.
    Series Statement: Memoir / Geological Survey of Canada 283
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    London : Her Majesty's Stationary Office
    Associated volumes
    Call number: MOP 23809 ; MOP 24412
    In: Geophysical memoirs
    Type of Medium: Monograph available for loan
    Pages: 228 S. : Ill.
    Series Statement: Geophysical memoirs / Meteorological Office 101 = 13,1
    Location: MOP - must be ordered
    Location: MOP - must be ordered
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 3
    Publication Date: 1989-10-27
    Description: Host cell factors act together with regulatory genes of the human immunodeficiency virus (HIV) to control virus production. Human-Chinese hamster ovary hybrid cell clones were used to probe for human chromosomes involved in regulating HIV gene expression. DNA transfection experiments showed that 4 of 18 clones had high levels of HIV gene expression measured by both extracellular virus production and transactivation of the HIV long terminal repeat in the presence of the trans-activator (tat) gene. Karyotype analyses revealed a 94% concordance (17/18) between human chromosome 12 and HIV gene expression. Other chromosomes had an 11 to 72% concordance with virus production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hart, C E -- Ou, C Y -- Galphin, J C -- Moore, J -- Bacheler, L T -- Wasmuth, J J -- Petteway, S R Jr -- Schochetman, G -- New York, N.Y. -- Science. 1989 Oct 27;246(4929):488-91.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centers for Disease Control, Atlanta, GA 30333.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2683071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chloramphenicol O-Acetyltransferase/genetics ; *Chromosomes, Human, Pair 12 ; Cricetinae ; Cricetulus ; Gene Expression Regulation, Viral/*genetics ; Genes, tat ; HIV-1/*genetics ; Humans ; Hybrid Cells ; Repetitive Sequences, Nucleic Acid ; Transcriptional Activation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1985-10-18
    Description: The analysis of inorganic atomic species is greatly facilitated by the coupling of lasers with mass spectrometers. A tunable dye laser, alone or in combination with a pump laser, ionizes atoms by resonant excitation processes; the ions are then analyzed in the mass spectrometer. The laser-mass spectrometer system promises to overcome traditional limits of sensitivity and selectivity and to have diverse applications in analytical chemistry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fassett, J D -- Moore, L J -- Travis, J C -- Devoe, J R -- New York, N.Y. -- Science. 1985 Oct 18;230(4723):262-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17782454" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2019-07-13
    Description: Research at NASA Lewis Research Center gave the opportunity to incorporate new control volumes in the Denton 3-D finite-volume time marching code. For duct flows, the new control volumes require no transverse smoothing and this allows calculations with large transverse gradients in properties without significant numerical total pressure losses. Possibilities for improving the Denton code to obtain better distributions of properties through shocks were demonstrated. Much better total pressure distributions through shocks are obtained when the interpolated effective pressure, needed to stabilize the solution procedure, is used to calculate the total pressure. This simple change largely eliminates the undershoot in total pressure down-stream of a shock. Overshoots and undershoots in total pressure can then be further reduced by a factor of 10 by adopting the effective density method, rather than the effective pressure method. Use of a Mach number dependent interpolation scheme for pressure then removes the overshoot in static pressure downstream of a shock. The stability of interpolation schemes used for the calculation of effective density is analyzed and a Mach number dependent scheme is developed, combining the advantages of the correct perfect gas equation for subsonic flow with the stability of 2-point and 3-point interpolation schemes for supersonic flow.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-CR-176428 , NAS 1.26:176428 , JM/85-11
    Format: application/pdf
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of organic chemistry 51 (1986), S. 3916-3918 
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 25-33 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Relative momentum densities have been measured for the outermost occupied π orbitals of acetylene, propyne, 2-butyne, and perfluoro-2-butyne using the (e, 2e) technique with an improved multiple detector spectrometer. The results, when compared with suitably averaged quantum mechanical calculations, show systematic differences between the molecules which can be interpreted in terms of wave function averages and differences using the ΔB(r) functions. A striking feature of the data is the significant momentum density at zero momentum for all of the molecules, in contrast to the calculations that all show zero momentum density. Ground state molecular distortions are discussed as a possible cause of the effect.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 1994-2001 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The distribution of electron momentum density has been measured for the outermost occupied orbitals of the vinyl halides and ethylene using the (e,2e) technique. In contrast to the ionization potentials for these π orbitals which decrease monotonically from vinyl fluoride to vinyl iodide, the values of the momenta where the distributions are a maximum, pmax, increase from the fluoride through the bromide and then shift back to a lower value for the iodide. This observation can be analyzed in terms of B(r), the Fourier transform of the observed momentum distribution, and ΔB(r), the difference between B(r) functions. The shape of ΔB(r) for the fluoride, chloride, and bromide in comparison to ethylene reflects the effect of the carbon–halogen antibonding interaction in these vinyl halides. On the other hand, in vinyl iodide the antibonding interaction is compensated for by the diffuse iodine 5p character of the molecular orbital. The relation of these observations to chemical properties of the vinyl halides is discussed along with differences between experiment and calculations at low momentum.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 78 (1956), S. 2414-2418 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2571-2573 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A strained layer of Si1−x Gex (As)/Si has been grown by molecular beam epitaxy (MBE) with the As dopant introduced by 1 keV ion implantation during growth. Analysis of the layer was made using secondary-ion mass spectrometry (SIMS), Rutherford backscattering (RBS), and proton-induced x-ray emission (PIXE)/channeling, using 2 MeV H+ ions. The layer thickness (∼1.4 μm) and composition (x∼0.015; nAs ∼6×1018 cm−3) measurements by SIMS, RBS, and PIXE were in agreement. RBS, PIXE/channeling showed that the crystalline quality of the strained layer was equivalent to that of the Si substrate. The substitutional fraction (∼0.75) of the As dopant was determined by PIXE/channeling.
    Type of Medium: Electronic Resource
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