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  • 1
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Temperaturabhängigkeit der Viskosität von Poly(isobutylmethacrylat)-Fraktionen mit ultrahoher Molekülmasse in verdünnter Lösung wurde untersucht. Im Temperaturbereich 20 bis 30°C wurde eine Diskontinuität der Grenzviskosität gefunden. Die Untersuchung der ungestörten Dimensionen und der Polymer-Lösungsmittel-Wechselwirkungs-parameter zeigte, daß sowohl die inter- als auch die intramolekularen Wechselwirkungen beeinflußt werden. Der Effekt verändert die Flexibilität der Molekülkette und andere Lösungseigenschaften.
    Notes: The temperature dependence of viscosity of ultrahigh molecular weight poly(isobutyl methacrylate) fractions in dilute solution has been investigated. A discontinuity of intrinsic viscosity was observed in the temperature range 20 to 30°C. The study of unperturbed dimensions and polymer-solvent interaction parameters shows that both inter- and intramolecular interactions are affected. This effect modifies the flexibility of the macromolecular chain and other properties in solution.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 12 (1992), S. 497-507 
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The paper deals with the pectolytic enzymes immobilization on different acrylic supports, and the application of immobilized preparations in the apple juice pectinization process.The correlation between the protein content (Cp) and specific catalytic activities of immobilized enyzme preparations suggest a specific immobilization process only in the case of PONILEX ASH type acrylic supports.The active immobilization degree on PONILEX ASH type supports of Ultrazym 100 G and technical pectinase extract ranged from 99.80 to 296.40% for the Pectinesterase (PE) activity, and from 101.85 to 252.94% for the chain splitting (CS) activity, proving that the ionic immobilization process is a selective one. The simulated operational stability of the immobilized pectolytic enzymes tested by the PE and CS activity values proves the preservation of enzyme catalytic activity.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 14 (1994), S. 75-86 
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper deals with the study of the behaviour of Amyloglucosidase covalently immobilized on acrylic supports in the maltodextrin hydrolysis process. The specific catalytic activity of the different immobilized Amyloglucosidase preparations critically depends on their protein content. The maltodextrin hydrolysis in the presence of the immobilized Amyloglusidase is a diffusion-controlled process. The simulated operational stability of the immobilized Amyloglucosidase tested by the specific activity and the substrate conversion proves the conservation of the catalytic enzymatic activity.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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