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  • 1
    Electronic Resource
    Electronic Resource
    Letters to the editor (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 959-960 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220536
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  • 2
    Electronic Resource
    Electronic Resource
    Activator effects on urease kinetics (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 1106-1112 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An experimental study of the effects of amino acid additives on the rates of urease kinetics showed that the degree of enhancement is sensitive to the relative levels of additives and substrate, and that enhancement can turn to inhibition at especially low concentrations of either arginine, DL-alanine, or glycine. Kinetic models developed to interpret these and prior literature data showed that all the data are consistent in the framework of the steady state model proposed but contradict the expectations that would follow from an equilibrium based treatment.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220622
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  • 3
    Electronic Resource
    Electronic Resource
    Turbulent drag reduction in dilute fiber suspensions: Mechanistic considerations (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 669-674 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Both fibrous and polymeric additives, used alone or in combination, appear to affect primarily the fluid in the sublayer region adjacent to a solid surface, contrary to previous predictions. An analysis of fluid deformation modes shows tentatively why drag reduction levels become less sensitive to system scale when fibrous additives are employed, and why polymeric and fibrous additives may be more effective in combination than when either additive is used alone.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220406
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of immobilization on the kinetics of enzyme-catalyzed reactions. I. Glucose oxidase in a recirculation reactor system (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 669-684 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Glucose oxidase from Aspergillus niger was immobilized on nonporous glass beads by covalent bonding and its kinetics were studied in a packed-column recycle reactor. The optimum pH of the immobilized enzyme was the same as that of soluble enzyme; however, immobilized glucose oxidase showed a sharper pH-activity profile than that of the soluble enzyme. The kinetic behavior of immobilized glucose oxidase at optimum pH and 25°C was similar to that of the soluble enzyme, but the immobilized material showed increased temperature sensitivity. Immobilized glucose oxidase showed no loss in activity on storage at 4°C for nearly ten weeks. On continuous use for 60 hr, the immobilized enzyme showed about a 40% loss in activity but no change in the kinetic constant.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260180507
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of immobilization on the kinetics of enzyme-catalyzed reactions. II. Urease in a packed-column differential reactor system (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 18 (1976), S. 685-699 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Urease from Jack bean was immobilized on nonporous glass beads by covalent bonding and its kinetics were studied in a packed-column differential reactor. To facilitate comparison, the urease was immobilized by both diazo and glutaraldehyde coupling. The kinetic properties of immobilized urease were similar to those of the soluble enzyme and different immobilization methods did not appreciably alter the kinetic properties. The affects of three different amino acid activators appear to follow predictions obtained from a relatively simple competitive model, except at very low substrate levels.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260180508
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  • 6
    Electronic Resource
    Electronic Resource
    Polyimides from diisocyanates and dianhydridesNCL Communication No. 1990. (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 56 (1976), S. 163-171 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyimide wurden durch die Reaktion von 3,3′-Sulfonyl-bis(phenylisocyanat) [SDI] mit Pyromellitsäuredianhydriden [PMDA] und 3,3′,4,4′-Benzophenon-tetracarbonsäuredianhydriden (BPTD) hergestellt. Ihre Eigenschaften wurden mit denjenigen der durch die Reaktion zwischen 4,4′-Methylen-bis(phenylisocyanat) [MDI] und den entsprechenden Diahydriden gewonnenen Polyimiden verglichen.
    Notes: Polyimides were prepared by reacting 3,3′-sulfonyl-bis(phenyl isocyanate) [SDI] with pyromellitic dianhydride [PMDA] and also with 3,3′,4,4′-benzophenone tetracarboxylic acid dianhydride [BPTD]. Their properties were compared with those obtained by reacting 4,4′-methylene-bis(phenyl isocyanate) [MDI] with respective dianhydrides.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050560113
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  • 7
    Electronic Resource
    Electronic Resource
    Studies on the reactivities of diisocyanatesNCL Communication No. 1927. (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 49 (1976), S. 129-137 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In der vorliegenden Arbeit wurden Bis(3-isocyanatophenyl)-sulfon und Bis(3-isocyanatophenyl)-methan hergestellt und ihre Reaktivität spektroskopisch untersucht.
    Notes: Bis(3-isocyanatophenyl)-sulfone and Bis(3-isocyanatophenyl)-methane were synthesized and their reactivities studied by spectroscopic methods.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050490111
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  • 8
    Electronic Resource
    Electronic Resource
    Über einige Nebenprodukte bei der Herstellung von Epoxidharzen aus Bisphenol A und Epichlorhydrin (1976)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 51 (1976), S. 11-24 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Some possible by-products of epoxy resins prepared by reaction of bisphenol A with epichlorhydrin were synthesized, and the gel chromatography behaviour when mixed with the epoxy resins was investigated. The most important by-product, which appears as a shoulder of the monomerpeak in the gelchromatogram of technical resins, is present at a relatively higher concentration compared to other byproducts. This product is obtained by reaction of one OH-group of the bisphenol A molecule to form a chlorhydrin ether and the other reacting to form a glycidyl ether.
    Notes: Es wurden einige mögliche Nebenprodukte bei der Herstellung von Epoxidharzen aus Bisphenol A und Epichlorhydrin synthetisiert; ihr gelchromatographisches Verhalten in Mischungen mit Epoxidharzen wurde untersucht. Das wichtigste Nebenprodukt, das als Schulter des Monomeren im Gelchromatogramm technischer Harze auftritt, kommt im Vergleich zu anderen Nebensubstanzen in relativ hoher Konzentration vor. Es handelt sich dabei um ein Reaktionsprodukt von Bisphenol A, bei dem eine OH-Gruppe zum Chlorhydrinäther und die andere zum Glycidyläther umgesetzt wurde.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1976.050510102
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  • 9
    Electronic Resource
    Electronic Resource
    Thermal degradation of poly(bismaleimides) (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 2911-2925 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thermal decomposition of poly(bismaleimides) has been investigated by using programmed and isothermal thermogravimetric analysis (TGA) in nitrogen. Reaction rates and overall activation energies were calculated from isothermal weight less studies. For five aliphatic poly(bismaleimides) a linear correlation between the activation energies and the number of methylene groups in the sequence between the maleimide residues was found. Aliphatic poly(bismaleimides) follow first-order kinetic law up to a conversion of 60-70% having activation energies between 196 and 256 kj/mole. poly(2,4-bismaleimidotoluene) which was found to have in highest polymer decomposition temperature (PDT) did follow the first-order kinetics up to a conversion of 60% in contrast to other aromatic poly(bismaleimides). In addition to the TGA, the pyro-field ion mass spectra of the polymers were recorded and are discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.170141208
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular mobility of α-substituted β-propiothiolactones and their polymerizability (1976)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 14 (1976), S. 777-779 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1976.170140326
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