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  • 1
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    Study of the reductive metabolism pathway of 4-methyl-5-(2-pyrazinyl)-1,2-dithiole-3-thione. An electrochemical approach (1986)
    Elsevier
    Details
    Publication Date: 1986-01-01
    Print ISSN: 0040-4020
    Electronic ISSN: 1464-5416
    Topics: Chemistry and Pharmacology
    Published by Elsevier
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Structural model for the binding of iron by anthracycline drugs (1989)
    s.l. : American Chemical Society
    Inorganic chemistry 28 (1989), S. 173-175 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00301a003
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dolastane and Secodolastane Diterpenes from the Marine Brown Alga, Dictyota cericornis (1986)
    s.l. : American Chemical Society
    Journal of natural products 49 (1986), S. 570-575 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50046a002
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  • 4
    Electronic Resource
    Electronic Resource
    Energy Conservation in France (1988)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 13 (1988), S. 159-183 
    Details
    ISSN: 0362-1626
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.eg.13.110188.001111
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  • 5
    Electronic Resource
    Electronic Resource
    Spin fluctuations in superconducting cuprates (invited) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6075-6080 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Our recent reports of highly energetic spin fluctuations in cuprate insulators closely related to high-Tc superconductors have raised the possibility that the strong spin interactions thus manifested may mediate the superconducting pairing. In La2CuO4 the exchange measured by light scattering is 1100 cm−1, while in Ba2YCu3O6 it is 950 cm−1. In the case of Ba2YCu3O6+x it was also shown that the fluctuations persist at room temperature when carriers have been introduced to make the material superconducting. The fluctuations in this case exhibit a broad spectrum shifted to lower frequency, with no clearly defined peak in the spectrum. In this paper, we shall (1) review the theory of two-magnon light scattering and the selection rules applicable to the cuprates, (2) present the data described above, and (3) present data on other related systems, including Eu2CuO4, La2NiO4, and the superconducting phase of Ba2YCu3O6.7 (for T〈Tc =60 K). Although the newest data show quite unequivocally that the spin fluctuations persist in the superconductor, there is as yet no detailed explanation of the observed line shape. Certainly, a simple first-order calculation for a spin-half Heisenberg square lattice gives a peak that is far narrower than that observed. Although a calculation based on a resonating valence bond model describes our line shape in insulating La2CuO4, other evidence contravenes this interpretation. It is thus not yet possible to say definitively whether the magnetic interaction is the root cause of the high-Tc phenomena. What is clear is that our data represent a clear and well-defined challenge for any detailed theoretical description of the cuprates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342126
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  • 6
    Electronic Resource
    Electronic Resource
    Vanadium in depression and cirrhosis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 113 (1987), S. 107-117 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We present the results of a 3 year study concerning serum vanadium measured by neutron activation analysis for 87 subjects from three populations (healthy controls, depressives, cirrhotics). We found depressives to have higher levels but no significant difference between cirrhotics and controls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036052
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  • 7
    Electronic Resource
    Electronic Resource
    Darwin's yellow rain (1986)
    [s.l.] : Nature Publishing Group
    Nature 322 (1986), S. 767-767 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-In the light of the continuing controversy over yellow rain, it might interest your readers to know that Charles Darwin observed and reported a case of yellow rain. The report was quoted in the 18 July 1863 issue of the Gardeners' Chronicle and Agricultural Gazette. The letter from Darwin reads ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/322767d0
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  • 8
    Electronic Resource
    Electronic Resource
    Topological implications of Y-conjugation for electronic transitions of cyanine dyes (1987)
    Springer
    Theoretical chemistry accounts 71 (1987), S. 299-304 
    Details
    ISSN: 1432-2234
    Keywords: Graph theory ; Conjugation ; Cyanine spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract To understand connections between electronic transitions of dyes having related conjugated systems, topological arguments from graph theory are often helpful. Using the Chebyshev expansion of the characteristic polynomials of cyanines, it is shown that the two possible structures of tribranched cyanines, i.e., a strongly out-of-plane orientation of one of the conjugated branches or a Y-conjugation of the entire unsaturated system, are both consistent with the similarities between visible absorption of these compounds and of simple chains. To choose between these two structures, evidence from other sources should be added.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00529101
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  • 9
    Electronic Resource
    Electronic Resource
    Shape optimal design—A CAD-oriented formulation (1986)
    Springer
    Engineering with computers 1 (1986), S. 193-204 
    Details
    ISSN: 1435-5663
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract In this paper a convenient geometrical representation for shape optimal design is first briefly recalled, as well as the corresponding sensitivity analysis formulation (stress and displacement derivatives). Two-dimensional structures are decomposed into a few design elements described by Bezier or B-splines blending functions. Next, the choice of the optimization algorithm is discussed. It is shown that well-known and efficient methods of structural sizing can be advantageously extended to shape optimal design problems. Experiments are performed with different approximation schemes and a new general optimization algorithm is introduced, which combines mixed approximations and dual methods. Three examples are also treated to demonstrate the generality and the efficiency of the new formulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01200136
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  • 10
    Electronic Resource
    Electronic Resource
    Shape sensitivity analysis using low- and high-order finite elements (1988)
    Springer
    Engineering with computers 4 (1988), S. 213-228 
    Details
    ISSN: 1435-5663
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract A general procedure to perform the sensitivity analysis for the shape optimal design of elastic structures is proposed. The method is based on the implicit differentiation of the discretized equilibrium equations used in the finite element method (FEM). The so-called semianalytical approach is followed, that is, finite differences are used to differentiate the finite element matrices. The technique takes advantage of the geometric modeling concepts typical of the computer-aided design (CAD) technology used in the creation of a compact design model. This procedure is largely independent of the types of finite elements used in the analysis and has been implemented in ah-version andp-version finite element program. Very accurate and stable shape sensitivity derivatives were obtained from both programs over a wide range of finite difference step sizes. It is shown that the method is computationally efficient, general, and relatively easy to implement. Some classical shape optimal design problems have been solved using the CONLIN optimizer supplied with these gradients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01213983
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