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  • 1
    Electronic Resource
    Electronic Resource
    Cross-linking of hexenyl silicone polymers via the olefin metathesis reaction (1994)
    Springer
    Journal of inorganic and organometallic polymers and materials 4 (1994), S. 367-376 
    Details
    ISSN: 1572-8870
    Keywords: Hexenyl silicones ; olefin metathesis ; silicone polymerization reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The olefin metathesis reaction was explored as a novel method to produce cross-linked silicone polymers. Although this reaction is well-known for non-silicone-containing monomers, there are no examples of this reaction in the presence of siloxanes. We have discovered a catalyst system for the reaction of silicone substrates comprised of a 1:4 molar ratio of WCl6/Sn(CH3)4. No metathesis is seen with the traditional ratio of catalyst and cocatalyst. In a model system, 1-hexenylmethylbis(trimethylsiloxy)silane underwent self-metathesis in greater than 75% yield. The catalyst system also promoted metathesis of a hexenyl containing silicone polymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00683701
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Role of the RecF gene product in UV mutagenesis of lambda phage (1986)
    Springer
    Molecular genetics and genomics 204 (1986), S. 82-84 
    Details
    ISSN: 1617-4623
    Keywords: RecF ; Ultraviolet light ; Mutagenesis ; Lambda ; E. coli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary E. coli recF mutants have a greatly reduced capacity for Weigle mutagenesis of ultraviolet light-irradiated lambda phage. A recF 332::Tn3 mutation was introduced into an E. coli recA441 lexA51 strain which constitutively expresses SOS functions. Weigle mutagenesis of phage lambda could occur in the resulting strain in the absence of host cell irradiation, and was increased when the recA441 (tif) allele was activated by increased temperature and excess adenine. The inability of recF strains to support Weigle mutagenesis can therefore be ascribed to a defect in expression of SOS functions after irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330191
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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