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  • 1970-1974  (4)
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Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    Stereoselectivity and dehalogenation mechanisms. The elimination reactions of meso- and dl-stilbene dibromides with iodide in methanol (1970)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 92 (1970), S. 4602-4609 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja00718a022
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The cyclization of mouse satellite DNA (1971)
    Springer
    Chromosoma 33 (1971), S. 284-296 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Sheared fragments of mouse satellite DNA can form rings and other circular structures by several techniques. „Folded rings“ are formed if the sheared fragments are simply annealed, indicating that shearing produces single-chain terminals, and that the repetitious sequence is shorter than the exposed ends. The occurrence of folded rings can be sharply reduced by prior treatment with single-chain specific endonuclease, and significantly increased if the fragments are treated with exonuclease III. Denaturation of satellite DNA followed by reassociation of the single chains results in the formation of “slipped rings”. These characteristics of the DNA lead to the conclusion that the sequences of the mouse satellite DNA are arranged in a tandemly repetitious manner.-About 20% of the DNA fragments from the “main band” cyclize after partial exonuclease III degradation, but not before this treatment. This indicates that a large fraction of the main band DNA is tandemly repetitious, but that the length of the repetitious sequence is on the average longer than the single-chain terminals produced by shearing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00284946
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Replicating DNA molecules from fertilized eggs of Cochliomyia hominivorax (Diptera) (1974)
    Springer
    Chromosoma 47 (1974), S. 429-437 
    Details
    ISSN: 1432-0886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract DNA samples were prepared from the early embryos of the screwworm, Cochliomyia hominivorax. When they were examined under the electron microscope, linear DNA molecules containing one or more replicating loops arrayed tandemly were abundantly observed. The average size of replicating loops is 0.83 μ. Further, the average distance between center-to-center of adjacent loops was found to be 2.3 μ. Both these numbers are considerably smaller than those of D. melanogaster. Comparisons between the developmental time and the replication pattern of these two insects are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00326364
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    DNA synthesis in larval brains of Drosophila nasutoides (1974)
    Springer
    Biochemical genetics 12 (1974), S. 475-483 
    Details
    ISSN: 1573-4927
    Schlagwort(e): larval brains ; H3-TdR incorporation ; satellite DNAs ; specific activities
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract The incorporation of H3-TdR and H3-TTP into embryos, embryo homogenates, and larval brains and imaginal discs of Drosophila nasutoides was examined. The highest incorporation was observed with brains and brain-associated imaginal discs incubated in Schneider's medium containing H3-TdR. A specific activity of 50,000 cpm/µg DNA or higher was obtained. By use of this method, the specific activities of the main DNA and the satellite DNAs of D. nasutoides were determined. It was observed that the specific activities were nearly the same regardless of labeling period, indicating that the main DNA and the satellite DNAs have similar extents of H3-TdR incorporation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00486065
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