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  • 1950-1954  (2)
  • 1
    Electronic Resource
    Electronic Resource
    A Unit of Penicillinase (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 740-741 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been our endeavour to determine the conditions under which the analysis of penicillinase activity can be made independent of the technique employed in determining the amount of penicillin inactivated. On this basis a definition of a unit of potency is proposed which is similar in magnitude ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/166740a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of molecular weight of polyvinylpyrrolidone (1953)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 10 (1953), S. 371-378 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The molecular weight of selected polyvinylpyrrolidone samples was determined by light scattering and by osmotic pressure in methanol. The corresponding limiting viscosity numbers were also determined, as well as the limiting viscosity number of the same samples in water. The data relating to the methanolic system conform with theory and the values for K and α in [η] = KMα were determined. The data relating to aqueous solutions do not show such conformity but an unexplained dependence on the degree of homogeneity of the samples. Nevertheless some empirical constants were deduced which may aid in industrial practice in which aqueous viscosity measurements are usual.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1953.120100402
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    Paper (German National Licenses)
    Fulltext
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