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Filtering by: Creator Moser, Stephen A. Remove constraint Creator: Moser, Stephen A. Academic Affiliation Microbiology Remove constraint Academic Affiliation: Microbiology

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  • Conserved properties in the metagenome of a large bacterioplankton population

    Creator:
    Wilhelm, Larry John
    Abstract:
    Candidatus Pelagibacter ubique is the first cultured representative of the SAR11 clade, a clade that is found throughout the oceans and accounts for approximately 25% of all bacterial cells [1]. It has a streamlined genome that is the smallest of any known free-living organism. In this study the complete genome...
    Resource Type:
    Masters Thesis
    Full Text:
    population Larry J. Wilhelm1, H. James Tripp1, Scott A. Givan2, Daniel P. Smith1, and Stephen

  • Developmental of a novel affinity ELISA and ita application to the analysis of affinity maturation in trout

    Creator:
    Shapiro, David A.
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: Stephen L. Kaattari This study was undertaken to develop a solid phase, enzyme based

  • Culturing uncultured environmental microorganisms

    Creator:
    Connon, Stephanie A.
    Abstract:
    Research on natural environments, over the last decade, is replete with microbial diversity studies that used culture-independent approaches. The cloning and sequencing of the 16S rRNA genes has been the driving force in the expansion of awareness about the great diversity of previously undiscovered microorganisms. Well-known uncultured groups of microorganisms...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Stephanie A. Connon for the

  • High resolution digital imaging of bacterial cells

    Creator:
    Siebold, William A.
    Abstract:
    The most abundant clone found in ribosomal RNA clone libraries obtained from the world's oceans belongs to the SAR11 phylogenetic group of environmental marine bacteria. Imaging and counting SAR11 bacterial cells in situ has been an important research objective for the past decade. This objective has been especially challenging due...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF William A. Siebold for the degree

  • Glucocorticoid regulation of salmonid B lymphocytes

    Creator:
    Tripp, Ralph A.
    Abstract:
    The in vitro effects of cortisol in regulating salmonid B cell functions were investigated. B cells at three distinct stages of differentiation were examined for cortisol sensitivity. B lymphocyte responses were examined 1) during the early stage of the precursor, 2) during the intermediate stage of differentiation associated with clonal...
    Resource Type:
    Dissertation
    Full Text:
    ABSTRACT OF THE THESIS OF Ralph A. Tripp for the degree of Doctor of Philosophy in Microbiology presented

  • Disturbances in a marine bacterioplankton system drive community assembly towards niche-based processes

    Creator:
    Vergin, Kevin L.
    Abstract:
    Over 100 monthly bacterioplankton DNA samples, from each of the surface and 200 m depths at the Bermuda Atlantic Time-series Study (BATS) site, were analyzed for community assembly processes. Correlation networks, filtered for potential autocorrelation artifacts, were constructed for each depth. Network characteristics for the two depths were remarkably similar...
    Resource Type:
    Masters Thesis
    Full Text:
    : Disturbances in a Marine Bacterioplankton System Drive Community Assembly Towards Niche-based Processes

  • Characterization of a new Lactobacillus species infectious for salmonid fish

    Creator:
    Hiu, Stephen Fooklen
    Abstract:
    A new Lactobacillus species is proposed to include 17 strains of a bacterium from rainbow (Salmo gairdneri) and cutthroat trout (Salmo clarki), and chinook salmon (Oncorhynchus tshawytscha). The bacterium was isolated most frequently from fish stressed by handling or spawn ing. Phenotypically, the strains belong to the family Lactobacillaceae and...
    Resource Type:
    Dissertation
    Full Text:
    Species Infectious for Salmonid Fish by Stephen Fooklen Hiu A THESIS submitted to Oregon State

  • Erythrocytic inclusion body syndrome : a viral disease of salmonid fish

    Creator:
    Piacentini, Stephen Carl
    Abstract:
    Erythrocytic inclusion body syndrome (EIBS), a viral disease of salmon, was investigated. Reliable artificial infections were established in coho salmon (Oncorhynchus kisutch) via intraperitoneal injection of homogenized kidney, spleen, and blood from naturally infected animals. By examining the exposed fish periodically for viral inclusion bodies and hematocrits, the disease progression...
    Resource Type:
    Masters Thesis
    Full Text:
    nucleic acid. Erythrocytic Inclusion Body Syndrome: A Viral Disease of Salmonid Fish by Stephen Carl

  • Investigation of Nematocyst Discharge in Parasitic Cnidarians (Myxozoa)

    Creator:
    Americus, Benjamin E.
    Abstract:
    Myxozoans are an enigmatic group of obligately parasitic, microscopic cnidarians. They diverged from their free-living relatives over 600 million years ago and have highly reduced genomes. However, they have retained nematocyst stinging cells which characterize the phylum Cnidaria. Free-living cnidarians utilize this cellular weaponry for defense and predation whereas the...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Stephen D. Atkinson Myxozoans are an enigmatic group of obligately parasitic, microscopic

  • An analysis of Sargasso Sea bacterioplankton diversity using 16S ribosomal RNA

    Creator:
    Britschgi, Theresa Baden
    Abstract:
    The objective of this project was to use ribosomal RNA genes, cloned from natural populations of Sargasso Sea bacterioplankton, as markers for picoplankton diversity. It is widely recognised that a majority of microorganisms have yet to be cultivated, and therefore much of extant microbial diversity remains unknown (50). The method...
    Resource Type:
    Masters Thesis
    Full Text:
    Bacterioplankton Diversity Using 16S Ribosomal RNA. Redacted for PrivacyAbstract Approved: Stephen J. Giovannoni