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Filtering by: Has journal Nature Remove constraint Has journal: Nature Degree Field Microbiology Remove constraint Degree Field: Microbiology Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Characterization of 16S Ribosomal RNA Probe-Isolated Lactococci from nature for use in Cheddar cheese manufacture

    Creator:
    Daniels, Brent E.
    Abstract:
    Strains of Lactococcus lactis ssp. lactis and Lactococcus lactis ssp. cremoris with potential use in the food industry which had been previously isolated from nature using 16S rRNA probes were characterized for unique identifying traits and for attributes important for potential use in cheese manufacture. Strains of Lc. cremoris which...
    Resource Type:
    Masters Thesis
    Full Text:
    Lactococci from nature for use in Cheddar cheese manufacture AN ABSTRACT OF THE THESIS OF Brent E. Daniels

  • The isolation of Lactococcus lactis subsp. cremoris from nature with probes for 16S ribosomal RNAs

    Creator:
    Salama, Maysoon
    Resource Type:
    Dissertation
    Full Text:
    nature with probes for 16S ribosomal RNAs AN ABSTRACT OF THE THESIS OF May soon Salama for the degree

  • 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:
    been hypothesized. An inhibitor of sterol synthesis which is cationic in nature has been found in

  • Suppression of cellular immune responses by Candida albicans

    Creator:
    Rivas Espinoza, Victor G.
    Abstract:
    Experimental infection of mice with Candida albicans leads to significant suppression of cell mediated immune responses. We have characterized the nature of this candida-induced suppression with formalin killed Candida albicans (FKCA) in the yeast and mycelia' phase. Mice (BALB/c or C57B1/6J) treated with FKCA exhibited a reduction in the T-cell...
    Resource Type:
    Masters Thesis
    Full Text:
    significant suppression of cell mediated immune responses. We have characterized the nature of this candida

  • Monoclonal antibodies to 5'-deoxy-5' methylthioadenosine phosphorylase

    Creator:
    Parker, Ricardo Jerome
    Abstract:
    5'-Deoxy-5'-methylthioadenosine phosphorylase catalyzes the phosphorolytic cleavage of 5'-deoxy-5'-methylthioadenosine to form 5'-deoxy-5'-methylthioribose-1-phosphate and adenine in mammalian cells and plays an important role in methionine and purine salvage. The enzyme is abundant in normal tissues and in cell lines derived from normal cells. However, several malignant tissues and cell lines have been...
    Resource Type:
    Dissertation
    Full Text:
    absent protein is unknown. In an attempt to determine the nature of methylthio- adenosine phosphorylase

  • A study of the fatty acids and lipids of Clostridium botulinum type B

    Creator:
    Paterno, Visitacion Asi
    Abstract:
    The difficulties encountered in working with micro-quantities of lipids have been overcome by the advent of new and improved procedures in chromatography which have made possible better fractionation and identification. Bacterial lipids because of their different lipid pattern from other life forms have stimulated much interest. Studies have been made...
    Resource Type:
    Masters Thesis
    Full Text:
    forms have stimulated much interest. Studies have been made on the nature of the various lipid

  • Growth, survival, and antibiotic resistance transfer of Klebsiella in a botanical environment

    Creator:
    Yamamoto, Deborah Keiko
    Abstract:
    The ubiquitous presence of the coliform bacterium Klebsiella in botanical environments has been demonstrated. In this study, Klebsiella were found to multiply and colonize growing radish plants following contamination of seeds. All 29 cultures of Klebsiella tested from 5 different environments were capable of growth to 10⁶-10⁷ cells/gram of plant...
    Resource Type:
    Masters Thesis
    Full Text:
    likely to occur in nature. GROWTH, SURVIVAL, AND ANTIBIOTIC RESISTANCE TRANSFER OF KLEBSIELLA IN A

  • Physical and functional characterization of soluble protein antigen(s) produced by Renibacterium salmoninarum

    Creator:
    Turaga, Prasad S. D.
    Abstract:
    Renibacterium salmoninarum produces bacterial kidney disease (BKD) in salmonid fish. Soluble antigen(s) (SA) produced by the bacterium was characterized by physicochemical, functional and immunological methods. The molecular weight determination by SDS-PAGE analysis of SA yielded 14 different molecular weight species. Seven of these species were prominent, 57 kd protein being...
    Resource Type:
    Dissertation
    Full Text:
    acidic nature. The SA preparation was demonstrated to possess protease activity, which was more

  • Oral immunization for the control of vibriosis in Pacific salmon

    Creator:
    Nelson, Jim Steel
    Abstract:
    An oral vaccine was developed for control of vibriosis in Pacific salmon. The vaccine consists of a lyophilized sonicate of cells of Vibrio anguillarum, the causative agent of this disease. The preparation was incorporated into a ration and fed to salmon in fresh water before the fish were transported and...
    Resource Type:
    Masters Thesis
    Full Text:
    percent mortality for vaccinated animals as compared to 90% mortality in nonvaccinated fish. The nature

  • 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:
    from both types of yeast were undergoing a phase transition, but the nature of this transition was