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Filtering by: Creator Getzin, Louis W. Remove constraint Creator: Getzin, Louis W. Degree Field Microbiology Remove constraint Degree Field: Microbiology Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • Significance of pigments in radiation resistance of Micrococcus radiodurans

    Creator:
    Krabbenhoft, Kenneth Louis
    Abstract:
    An ecological study of a microorganism similar to that isolated in 1956 and designated as Micrococcus radiodurans indicated that the organism could be isolated from several different environments. By taking advantage of its radio-resistivity, high levels of gamma radiation were used in the isolation procedures to inactivate most of the...
    Resource Type:
    Dissertation
    Full Text:
    Micrococcus radiodurans AN ABSTRACT OF THE THESIS OF Kenneth Louis Krabbenhoft for the Ph. D, in

  • The role of S-adenosylmethionine in the biosynthesis of ergosterol and related sterols in Saccharomyces cerevisiae

    Creator:
    Turner, Jan Ross
    Abstract:
    An enzyme system was prepared from Saccharomyces cerevisiae, strain MCC, which carries out the transfer of the methyl group from S-adenosylmethionine or methionine to the side chain of yeast sterols. The cell-free system has been shown to be incapable of synthesizing ergosterol but carries out the synthesis of two as...
    Resource Type:
    Dissertation
    Full Text:
    by Ruth Baines ACKNOWLEDGMENTS I want to express my appreciation to Dr. L. W. Parks for his

  • Carbohydrate metabolism in lactic streptococci with special reference to galactose

    Creator:
    Lee, Donald Royce
    Abstract:
    Phosphorylation of free galactose by lactic streptococci was mediated by an adenosine triphosphate (ATP) dependent kinase which was repressed by glucose. The phosphoenolypyruvate (PEP) phosphotransferase system (PTS) was not involved in transport of galactose, The conversion of free galactose to glucose was also demonstrated. A key Leloir pathway enzyme, uridine...
    Resource Type:
    Dissertation
    Full Text:
    LACTIC STREPTO- COCCI WITH SPECIAL REFERENCE TO GALACTOSE Redacted for Privacy Abstract approved: Dr. W

  • Aspects of ergosterol biosynthesis in Saccharomyces cerevisiae

    Creator:
    Monner, David Anthony
    Abstract:
    The regulation of ergosterol biosynthesis in yeast has been studied. The system has been examined for the presence of an end-product inhibition. Both anaerobically and aerobically grown cells have been examined for this effect. A feedback inhibition of sterol synthesis has been shown, but it appears to be a secondary...
    Resource Type:
    Dissertation
    Full Text:
    ERGOSTEROL BIOSYNTHESIS IN SACCHAROMYCES CEREVISIAE Abstract approved: Leo W. Parks The regulation of

  • Morphologic, molecular and antigenic characteristics of Bacteroides nodosus

    Creator:
    Gradin, Joseph Lloyd
    Resource Type:
    Dissertation
    Full Text:
    Bactt.!idel'' sus Pili Abstract approved: Redacted for privacy Alvin W. Smith V Bacteroides nodosus is

  • Photooxidative degradation of annual rye-grass straw to substrates enhancing rhodotorula mucilaginosa growth

    Creator:
    Park, Jerry Eugene
    Abstract:
    Annual ryegrass (Lolium multiflorum) is a major seed crop in the Willamette Valley of Oregon. Persistent crop diseases have necessitated annual field burning to protect future crops. This practice, while very effective for disease eradication, produces large quantities of air polluting smoke in the valley and a general wastage of...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Redacted for privacy A. W. Anderson Annual ryegrass (Lolium multiflorum) is a major

  • Transmission of disseminated neoplasia in the soft shell clam, Mya arenaria

    Creator:
    House, Marcia
    Abstract:
    Disseminated neoplasia (DN) is a proliferative cell disorder that occurs in the circulatory system of bivalves. The condition is progressive and lethal. At least 15 species of bivalves over a wide range of geographic locations have been reported to contract DN. Prevalence levels of disseminated neoplasia can reach up to...
    Resource Type:
    Dissertation
    Full Text:
    DISSEMINATED NEOPLASIA IN THE SOFT SHELL CLAM. MYA ARENARIA Abstract approved: PAUL W. RENO Disseminated

  • The distribution and influence of sterols in yeast membranes

    Creator:
    Bottema, Cynthia D. K.
    Abstract:
    Plasma membranes from Saccharomyces cerevisiae were prepared by a new procedure involving lyticase treatment of the yeast cells. The plasma membranes were right-side out, closed vesicles of uniform appearance with a sterol to phospholipid molar ratio of 0.365. The thermotropic behavior of these plasma membranes from wild-type yeast and from...
    Resource Type:
    Dissertation
    Full Text:
    Sterols in Yeast Membranes Abstract approved: Leo W. Parks Plasma membranes from Saccharomyces

  • Detection of staphylococcal enterotoxin A by Laurell electroimmunodiffusion

    Creator:
    Gasper, Ekkehart
    Abstract:
    The serological detection of staphylococcal enterotoxin A by the quantitative technique of Laurell electroimmunodiffusion is described as well as the application of the technique to the detection of small quantities of enterotoxin A in foods. High dilutions of type-specific rabbit antiserum were used in 1% agarose gels, 1 mm thick,...
    Resource Type:
    Dissertation
    Full Text:
    LAURELL ELE,OTROWIONO9'IyArSq)N Abstract approved: Redacted for PrivacyLe, f..." Dr. Arthur W. Anderson

  • Improved detection methods and physiological studies of staphylococcal enterotoxin

    Creator:
    Kimble, Charles E.
    Abstract:
    The purpose of this study was to develop means to facilitate the detection of staphylococcal enterotoxin and to elucidate factors that influence enterotoxin formation. It was found that semipurification flat-gel electrophoresis in a water-cooled apparatus was more efficient than CM-cellulose and Sephadex column chromatography currently used to separate toxin from...
    Resource Type:
    Dissertation
    Full Text:
    approved: A. W. Anderson The purpose of this study was to develop means to facilitate the detection of