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  • American Association for the Advancement of Science (AAAS)
  • 2005-2009
  • 1990-1994  (1)
  • 1980-1984  (2)
  • 1965-1969
  • 1991  (1)
  • 1984  (2)
  • 1
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    Evidence for biased gene conversion in concerted evolution of ribosomal DNA (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-01-18
    Description: Concerted evolution is the production and maintenance of homogeneity within repeated families of DNA. Two mechanisms--unequal crossing over and biased gene conversion--have been the principal explanations of concerted evolution. Concerted evolution of ribosomal DNA (rDNA) arrays is thought to be largely the result of unequal crossing over. However, concerted evolution of rDNA in parthenogenetic lizards of hybrid origin is strongly biased toward one of two parental sequences, which is consistent with biased gene conversion as the operative mechanism. The apparent gene conversions are independent of initial genome dosage and result in homogenization of rDNA arrays across all nucleolar organizer regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hillis, D M -- Moritz, C -- Porter, C A -- Baker, R J -- New York, N.Y. -- Science. 1991 Jan 18;251(4991):308-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Texas, Austin 78712.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1987647" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Blotting, Southern ; DNA, Ribosomal/*genetics ; Gene Conversion ; Karyotyping ; Lizards ; Nucleic Acid Hybridization ; Parthenogenesis ; Restriction Mapping
    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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  • 2
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    Timekeeping and culture: revolution in time (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-03-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Porter, G -- New York, N.Y. -- Science. 1984 Mar 30;223(4643):1401-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17746047" 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
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Toxicant-disease-environment interactions associated with suppression of immune system, growth, and reproduction (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-06-01
    Description: The effects of marginal malnourishment , infections, and environmental chemicals on growth and reproductive success in Swiss-Webster white mice and wild deer mice were studied with fractional factorial designs. Interaction effects were discovered. For example, malnourished mice were more sensitive to virus exposure and environmental chemicals (a plant growth regulator or polychlorinated biphenyls). Since several commercial plant growth regulators also appear to suppress the immune system, these results cast doubt on the adequacy of current toxicity testing procedures in which factors are studied individually and not in combination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Porter, W P -- Hinsdill, R -- Fairbrother, A -- Olson, L J -- Jaeger, J -- Yuill, T -- Bisgaard, S -- Hunter, W G -- Nolan, K -- 5-T32-ES07015/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 1;224(4652):1014-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6426058" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Wild ; Chlormequat/adverse effects ; Cyclophosphamide/adverse effects ; Encephalomyelitis, Venezuelan Equine/physiopathology ; Environmental Exposure ; Female ; Food Supply ; Growth/*drug effects ; Humans ; Immunity/*drug effects ; Mice ; Nutrition Disorders/physiopathology ; Peromyscus ; Polychlorinated Biphenyls/adverse effects ; Pregnancy ; Reproduction/*drug effects ; Water Supply
    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)
    Location Call Number Expected Availability
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