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Filtering by: Creator Berstein, R. Remove constraint Creator: Berstein, R. Decade 1960-1969 Remove constraint Decade: 1960-1969

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  • Dermatitic effect of nonionic surfactants

    Creator:
    Mezei, Michael
    Abstract:
    Selected nonionic surface active agents, incorporated in various ointment bases, were applied to normal rabbit skin daily in an attempt to determine their chronic toxicity. The dermatitic effects of these surfactant preparations were evaluated by three methods: gross observation, histological examination and biochemical techniques. The results indicated that the tested...
    Resource Type:
    Dissertation
    Full Text:
    carcinoma) has been studied by Ka}r (1965 a, b). He reported that polysorbate 80 produced marked

  • Determination of barriers to internal rotation from low temperature heat capacity data

    Creator:
    Simpson, Kenneth Owen
    Abstract:
    A method by which barrier heights in potential functions hindering internal rotation in organic molecules can be obtained solely from thermal data for the solid phase is studied. The observed heat capacities are analyzed in terms of contributions from the lattice vibrations, the intramolecular vibrations, the expansion of the lattice,...
    Resource Type:
    Masters Thesis
    Full Text:
    . I Cy =R i= E(6Ei/T) (4) The vibrational spectrum of the solid should be used whenever

  • The association of DNA with other cellular materials in Escherichia coli lysates

    Creator:
    Porter, Bruce Wallace
    Abstract:
    The association of other materials with DNA has been studied extensively in higher organisms and more recently in bacteria. However, investigation of these complexes in bacteria have for the most part been restricted to the study of a specific function this association may serve, or a specific kind of association....
    Resource Type:
    Dissertation
    Full Text:
    removed, the chromosomes microscopic ap- pearance was changed. Berstein and Mazia (1953) also found pro

  • Pathways of glucose utilization and ribose synthesis in the chick embryo

    Creator:
    Coffey, Ronald Gibson
    Abstract:
    The production of C¹⁴O₂ metabolized from glucose labeled in specific carbon atoms by homogenates of chick embryonic and adult heart was compared by the radiorespirometric technique. Homogenates of early (two to five days of incubation) embryo hearts were found to utilize the phosphogluconate pathway of glucose catabolism to a greater...
    Resource Type:
    Dissertation
    Full Text:
    triphospho­ tone -l-C , 14 which was metabolized to c o14 2 to a grea.te r extent than glucose- U -C

  • Radiotracer methodology in biological science

    Creator:
    Willis, David L.
    Abstract:
    The use of radioactive isotopes as tracers in biological systems has become widespread since the close of World War II. Proper use of radiotracers requires a fundamental understanding of the physical nature of radioactivity, the characteristics of ionizing radiation, and the various methods available for measuring radioactivity. More importantly, the...
    Resource Type:
    Dissertation