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  • 2000-2004
  • 1990-1994  (4)
  • 1945-1949
  • 1990  (4)
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  • 2000-2004
  • 1990-1994  (4)
  • 1945-1949
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  • 1
    Electronic Resource
    Electronic Resource
    The Effect of Being Reared with an Alcoholic Half-Sibling: A Classic Study Reanalyzed (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Family process 29 (1990), S. 0 
    Details
    ISSN: 1545-5300
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: Data from an early study of alcoholism among half-siblings of alcoholic probands (17) was reanalyzed using log-linear analysis. The original study, which used chi-square analysis, identified genetic factors but found no environmental effects that contributed to the prediction of alcoholism. Log-linear analysis, however, reveals that being reared with a proband is associated with a reduced incidence of alcoholism in half-siblings. The results do not disconfirm the presence of genetic factors, but they do indicate that family dynamics make an independent and statistically significant contribution to the development of alcoholism not heretofore demonstrated. Similarities between these results and the results from studies of identical twins are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1545-5300.1990.00087.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cutting-plane proofs in polynomial space (1990)
    Springer
    Mathematical programming 47 (1990), S. 11-18 
    Details
    ISSN: 1436-4646
    Keywords: Integer programming ; cutting planes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Following Chvátal, cutting planes may be viewed as a proof system for establishing that a given system of linear inequalities has no integral solution. We show that such proofs may be carried out in polynomial workspace.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01580849
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Anomalous electron transport activity in a Photosystem I-deficient maize mutant (1990)
    Springer
    Photosynthesis research 24 (1990), S. 81-88 
    Details
    ISSN: 1573-5079
    Keywords: CP1 ; electron transport ; hcf ; mutant ; Photosystem I ; transposable element
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Photosynthesis mutations were induced in maize lines bearing the transposable DNA element system, Mutator. Two Photosystem I mutants (hcf101 and hcf104) which were isolated are described here. Maize plants homozygous for the hcf104 mutation are seedling lethal and exhibit a high in vivo chlorophyll fluorescence yield. They lack ∼60% of CP1, P700 and PSI-specific electron transport activity relative to normal sibling plants. The comparable depletion of these three measures of PS I content conforms to the pattern reported for many other PS I-deficient mutants. Maize plants homozygous for hcf101 are seedling lethal and also exhibit high in vivo chlorophyll fluorescence yield. They lack 80–90% of CP1 and P700 but sustain steady state levels of PS I-specific electron transport activity at 70% of normal. Previous reports of similar apparent PS I hyperactivity are discussed and an explanation for the elevated steady state level of PS I electron transport activity in hcf101 is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00032647
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    Paper (German National Licenses)
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  • 4
    Book
    Book
    Polyhedral combinatorics: Proceedings of a DIMACS workshop June 1989.; Vol. 1 (1990)
    Providence, RI :AMS,
    Details
    Title: Polyhedral combinatorics: Proceedings of a DIMACS workshop June 1989.; Vol. 1
    Contributer: Cook, William , Seymour, Paul D.
    Publisher: Providence, RI :AMS,
    Year of publication: 1990
    Pages: 288 S.
    Series Statement: DIMACS Series in Discrete Mathematics and Theoretical Computer Science Vol. 1
    Type of Medium: Book
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