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  • 1985-1989  (7)
  • 1988  (2)
  • 1986  (5)
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  • 1985-1989  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    X-ray and Raman characterization of AlSb/GaSb strained layer superlattices and quasiperiodic Fibonacci lattices (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6733-6745 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Double-crystal rocking curves of samples grown on (001)-oriented GaSb substrates by molecular-beam epitaxy have been analyzed by fitting computer simulations to data for the symmetric (004) and (002) reflections and for asymmetric (115) reflections. Rocking curves revealed a multiplicity of superlattice diffraction peaks. Dynamical diffraction theory using Abeles matrix method [D. W. Berreman, Phys. Rev. B 14, 4313 (1976)] was applied for the symmetrical reflections. We compare our results to standard kinematical simulations, and we find that there are significant differences. For the asymmetric reflections a new dynamical computer simulation code [D. W. Berreman and A. T. Macrander, Phys. Rev. B 37, 6030 (1988)] involving an 8×8 matrix solution of Maxwell's equations was used. Lattice incoherency was determined from measurements of the in-plane mismatch. Dramatic diffraction peak broadening was observed for incoherent superlattices, and this broadening was attributed to a mosaic structure formed by misfit dislocations. Peak broadening was used to infer both a growth direction as well as an in-plane coherence length. The in-plane coherence length was found to be somewhat less than the mean distance between misfit dislocation lines. Mosaic broadening of diffraction peaks of a quasiperiodic lattice was found to be qualitatively similar to that observed for the periodic superlattices. Raman measurements of zone-folded acoustic phonon spectra yielded superlattice periods that agreed with the x-ray measurements within a few percent. Analysis of Raman peak intensities to yield individual layer widths was not found to be quantitative within the confines of current analytic models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342005
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Biomechanical Stability and Design Wear (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 523 (1988), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1988.tb38524.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Regulation of Transepithelial H+ Transport by Exocytosis and Endocytosis (1986)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 48 (1986), S. 153-161 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.48.030186.001101
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Light induced and "dark'' rotamerization of simple ethers and thioethers in solid neon (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 59-65 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Several simple ethers and thioethers are examined in solid neon matrix by FTIR and Raman spectroscopy. In each compound several rotational isomers are observed and their infrared induced and "dark'' interconversions occurring in the matrix investigated. New information is obtained about the spectra and torsional potentials of the compounds studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450130
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Production and characterization of some mixed Group V A dimers in solid neon (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 86-92 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Vaporization of ternary III–V mixtures is shown to provide a convenient source of the Group V heteronuclear diatomic molecules. Several such mixtures were vaporized and the vapors condensed in neon matrix and examined by time resolved, laser induced fluorescence spectroscopy. The excitation spectra of AsP and SbP dimers were examined and several new excited electronic transitions were observed and analyzed. The assignment of the new states is discussed and the electronic structure of these molecules reviewed and summarized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451600
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Insulin autoantibodies in the pre-diabetic period: Correlation with islet cell antibodies and development of diabetes (1986)
    Springer
    Diabetologia 29 (1986), S. 339-342 
    Details
    ISSN: 1432-0428
    Keywords: Insulin autoantibodies ; pathogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary IgG and IgM class insulin autoantibodies were measured by an enzyme-linked immunosorbent assay in sera from members of the Barts-Windsor-Middlesex prospective family study for Type 1 (insulin-dependent) diabetes. One hundred and twelve individuals from 28 families were selected for study on the basis of a clearly defined islet cell antibody status. IgG insulin autoantibodies were found to be significantly associated with islet cell antibody positive (n=30) versus islet cell antibody negative (n= 57) first degree family relatives (p=0.002), with increased significance (p=0.0003) if complement-fixing (CF)-islet cell antibody individuals (n=20) only were considered. In addition, a significant association of IgG insulin autoantibodies with subsequent development of diabetes was observed within the CF-islet cell antibody positive group (p〈0.0003). No such associations were found for IgM insulin autoantibodies, but a higher prevalence of these autoantibodies was observed in islet cell antibody negative first degree relatives (n=57) compared with a control group of 73 Blood Bank donors (p=0.00007), and they were significantly associated with siblings (n=48) rather than parents (n=39), (p=0.001). We conclude that the presence of IgG insulin autoantibodies and CF-islet cell antibodies confer more risk for future development of diabetes than the presence of either marker alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00452073
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A DR3-related DXα gene polymorphism strongly associates with insulin-dependent diabetes mellitus (1986)
    Springer
    Immunogenetics 23 (1986), S. 47-51 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract HLA-DQα and HLA-DXα gene polymorphisms were analyzed by Southern blot techniques in 78 Caucasoid insulin-dependent diabetes mellitus (IDDM) subjects and 55 control subjects. Five restriction fragment length polymorphisms of the HLA-DQ α gene correlated with HLA-DR typing. Two allelic DX α-related gene fragments, of 2.1 kb (U) and 1.9 kb (L) in size were identified. Genotype frequencies in the IDDM group for UU, UL, and LL were 54%, 38.5%, and 7.5%, respectively, whereas the corresponding frequencies in the control group were 24%,40%, and 36% (P 〈 0.00005 for differences in genotype frequencies). The U allele was associated particularly with IDDM patients who were DR3, with healthy controls who were DR3, as well as with IDDM patients who were not DR3. Thus, if this DX α U allele is not the DR3-associated IDDM susceptibility gene, it is the closest marker hitherto studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376521
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    Paper (German National Licenses)
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