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  • 1
    Electronic Resource
    Electronic Resource
    The chain effect. Part III. Induction of secondary structure in copolymerizations (1966)
    New York : Wiley-Blackwell
    Biopolymers 4 (1966), S. 1067-1072 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies of the properties of copolymers of N-carboxy sarcosine anhydride with other N-carboxy α-amino acid anhydrides have shown that the secondary structure may be a function of the type of initiator used. In particular, when polysarcosine is the initiator, and the “chain effect” becomes possible, blocklike character appears in the copolymer. This is the result of selective and rapid polymerization of N-unsubstituted N-carboxy α-amino acid anhydrides by the chain-effect mechanism. In suitable circumstances, therefore, the latter may be used to induce order into copolymerizations of this type.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1966.360041003
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Extent and stability of the α-helix in γ-benzyl L-glutamate-glycine copolymers (1967)
    New York : Wiley-Blackwell
    Biopolymers 5 (1967), S. 243-249 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Block and random copolymers of γ-benzyl L-glutamate and glycine were studied by optical rotatory dispersion methods in order to ascertain the extent and stability of the α-helix formed by these polymers in appropriate solvent mixtures. Results indicate that when in solution such polymers do contain sections of α-helix. However, it appears that glycine does not readily fit into the α-helix which is largely due to the γ-benzyl L-glutamate segments. Further, there are indications that the helical sections in the random copolymers are due to the nonrandomness of the polymerization.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1967.360050302
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Observations on the dielectric anisotropy of solutions of flexible polymers in flow (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 16 (1978), S. 989-998 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Measurements of the increase in the relative permittivity for solutions of polystyrenes, poly(p-ethoxystyrene), poly(methyl methacrylate), and poly(N-vinyl carbazole) when subjected to shear gradients are reported. The influences of such factors as shear rate, concentration, viscosity, solvent permittivity, polymer dipole moment, and polymer molecular weight on the phenomenon are described. An empirical correlation for the diverse data obtained with polystyrenes and poly(p-ethoxystyrene) has been established, but this relation does not entirely match the theoretically predicted effects. We discuss the various physical processes which may have an influence on the observed phenomenon.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.180160606
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    Paper (German National Licenses)
    Fulltext
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