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  • 1
    Electronic Resource
    Electronic Resource
    Application of living microbial cells entrapped with synthetic resin prepolymers (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 1055-1061 
    Details
    ISSN: 1420-9071
    Keywords: Immobilization ; entrapment ; immobilized cells ; micorobial cells ; synthetic resin prepolymers ; bioprocesses ; bioconversion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Living and growing microbial cells were immobilized by entrapping in synthetic resin gels prepared from their prepolymers, and used in the production of various useful substances. The production of the desired metabolites and also both the activity and the stability of the catalytic systems were seriously affected by the physico-chemical properties of the prepolymers, and those of the resin gels subsequently formed, such as gel network, hydrophilicity-hydrophobicity balance and ionic nature, as well as by the type of bioreactors. Hydroxylation of steroids and production of antibiotics, polypeptides and other biologically active substances, and the effects of gell properties on them are discussed as examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950158
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of dynamic density by simultaneous measurement of ultrasonic velocity and elastic modulus under oscillatory deformation (1989)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 29 (1989), S. 1131-1135 
    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: It is proposed that dynamic density can be estimated from simultaneous measurements of ultrasonic velocity and modulus under an oscillatory deformation. An experimental investigation was carried out and a theoretical model applied. Preliminary experiments show that measurement of the dynamic density is a major aid to the study of plastic deformation.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760291610
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrasonic velocity and attenuation of polymeric solids under oscillatory deformation: Apparatus and preliminary results (1989)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 29 (1989), S. 1124-1130 
    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: A new apparatus has been constructed in which ultrasonic velocity and attenuation coefficients can be measured under oscillatory deformation. Using this apparatus, dynamic ultrasonic parameters were obtained with sufficient accuracy to investigate plastic deformation directly. It is found that this method has potential as a new tool for the study of solid polymers during deformation.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760291609
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    Paper (German National Licenses)
    Fulltext
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