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  • 1985-1989  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 198 (1985), S. 304-308 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Synthesis of tryptophanase, D-serine deaminase and alkaline phosphatase in Escherichia coli C was repressed as the result of infection with the single-stranded DNA bacteriophage ϕX174. However, the degree of repression differed, the more catabolite-sensitive the operon was, the more severe was the repression. For the catabolite-sensitive enzymes it was found that cyclic adenosine 3′5′ monophosphate (cyclic AMP or cAMP) was unable to release or reduce the phage-induced inhibition. Experiments with amber mutants of ϕX174 revealed that A*, product of cistron A, was responsible for the inhibition. The cistron A product probably acted at the level of transcription. The possible role of A* in the observed modulation of gene expression is discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 35 (1988), S. 973-985 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A systematic study of the process variables for polyester composites based on different natural fibers like jute, sisal, ramie, and pineapple has been made with a view to determine the most suitable processing conditions for such composites. Effect of polyesteramide polyol (PEAP) as interfacial agent in such composites has also been discussed. Fracture modes of jute/polyester (JP) composite sample having different fiber volume fractions have been examined by scanning electron microscope (SEM). Fracture surfaces of untreated and PEAP-treated JP composite samples have been examined in SEM, both before and after 72 h immersion in boiling water, to study the nature of interfacial bonding on fiber treatment with PEAP. A qualitative improvement in bonding in case of PEAP-treated JP composites is evident from SEM photomicrographs. This is also supported by physicomechanical properties of the composite samples.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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