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  • Articles: DFG German National Licenses  (4)
  • Electronic Resource  (4)
  • 1975-1979  (4)
  • 1930-1934
  • 1870-1879
  • Chemistry  (3)
  • Mitochondrial rRNA  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Temperature-sensitive nuclear mutants of Neurospora crassa deficient in mitochondrial ribosomes (1979)
    Springer
    Current genetics 1 (1979), S. 1-7 
    Details
    ISSN: 1432-0983
    Keywords: Mitochondrial rRNA ; Nuclear/mitochondrial interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have isolated two non-allelic nuclear mutants of Neurospora crassa that are temperature-sensitive for the production of cytochromes aa 3 and b. When grown at 23 °C the mutants are virtually indistinguishable from the parent wild-type strains. When grown at 41 °C the mutants have large amounts of KCN-insensitive respiration and lack cytochromes aa 3 and b. Further examination of the mutants revealed that they were extremely deficient in their capacity for mitochondrial protein synthesis when grown at 41 °C. This protein synthesis deficiency appears to be related to a virtual absence of both small and large mitochondrial ribosomal subunits following growth at 41 °C. Examination of the mitochondrial RNAs of the mutants suggests that mitochondrial rRNAs are synthesized in greatly reduced amounts or that they are misprocessed when these mutants are grown at the non-permissive temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413301
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Compatible glassy polyblends based upon poly(2,6-dimethyl-1,4-phenylene oxide): Tensile modulus studies (1979)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 19 (1979), S. 519-524 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: The mechanical behavior of compatible glassy polyblends based upon poly(2.6-dimethyl- 1,4-phe nylene oxide) (PPO) was investigated. In particular, the influence of composition, molecular weight, and molecular weight distribution upon the tensile modulus of the blend was assessed. Various possible correlations between the experimentally determined moduli and theory are considered. Included are correlations with density, packing density, composite theory, and lattice fluid theory. The modeling of the properties of mixtures via Simplex lattice design is also presented. Finally, attention is given to the development of compatibility criteria based upon tensile modulus and density measurements.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760190710
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Curing and heat transfer in polyurethane reaction moldingPresented in part at the AiChE Annual Meeting, Chicago, 1976. (1978)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 18 (1978), S. 382-387 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    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: Temperature measurements were made on the adiabatic polymerization of three urethane systems; two casting formulations, one thermoplastic and the other thermosetting, and a commercial reaction injection molding (RIM) formulation with a 10 second gel time. The data were found to fit a simple nth order overall kinetic expression. These kinetic and heat of reaction results were used to model heat transfer in a 3.8 cm diameter cylinder with an isothermal wall. Experimental temperature profiles for the two casting urethanes were in good agreement with predictions. The kinetic data on the RIM material was used to model temperature profiles1 in 3 and 6 mm thick plaque molds. Experimental measurements of temperature near the mold center agreed with the model. Temperatures measured near the wall were higher due to failure of the isothermal wall assumption.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760180509
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Reports on progress in polymer physics in Japan, Vol. XVIII, 1975, Research Group of Polymer Physics in Japan, Gakujutsu Bunken Fukyukai, Tokyo, Japan, 1975, 683 pp. $22.00 (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 14 (1976), S. 432-433 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.130140713
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    Paper (German National Licenses)
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