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Filtering by: Alternative title ssim Circular of information no. 688 Remove constraint Alternative title ssim: Circular of information no. 688 Degree Field Microbiology Remove constraint Degree Field: Microbiology

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  • Interactions between microbial dynamics, water flow, and solute transport in unsaturated porous media

    Creator:
    Yarwood, Rockie R.
    Abstract:
    Bioremediation in the vadose zone is unpredictable because of poor understanding of factors influencing microbial growth in this environment. A lab-scale experimental system was developed to examine, noninvasively, interactions between microbial growth, water flow, and solute transport in unsaturated porous media. Measurements of microbial colonization, and its impact on hydrology,...
    Resource Type:
    Dissertation
    Full Text:
    nondestructively monitor the system over time and provides an outstanding density of information at high spatial

  • Antimicrobial resistance and plasmid properties of Leuconostoc and group N Streptococcus

    Creator:
    Orberg, Paulo K.
    Abstract:
    A method for rapid isolation of plasmid DNA from group N streptococci was developed. Chief advantages of the method were simplicity, the utilization of microliter quantities of reagents, and the obtainment of preparations highly enriched for covalently closed circular plasmid DNA. The method was also applied to over 15 Leuconostoc...
    Resource Type:
    Dissertation
    Full Text:
    , and the obtainment of preparations highly enriched for covalently closed circular plasmid DNA. The

  • Adaptation of molecular filtration for recovery of fish viruses from water

    Creator:
    Watanabe, Robin Aiko
    Abstract:
    The effectiveness of tangential flow filtration (TFF) for recovery of infectious hematopoietic necrosis virus (IHNV) and infectious pancreatic necrosis virus (IPNV) from large volumes of water was evaluated. In laboratory studies, virus recovery from IHNV-seeded water following concentration by TFF was approximately 13%. However, addition of 0.1 and 1% FBS...
    Resource Type:
    Masters Thesis
    Full Text:
    was also detected at levels of 1 pfu/50 ml in water from a 2 m circular tank containing IHNV-infected

  • Transcriptome Responses of the Nitrifying Bacteria Nitrosomonas europaea and Nitrobacter hamburgensis to Low Oxygen

    Creator:
    Dobie, Michael
    Abstract:
    Nitrification is the process within the global Nitrogen Cycle where ammonia (NH3) is oxidized to nitrate (NO₃⁻) and can be carried out by two distinct groups of bacteria. The ammonia-oxidizing bacteria (AOB) first oxidize NH₃ to nitrite (NO₂⁻), and second, the nitrite-oxidizing bacteria (NOB) oxidize NO₂⁻ to NO₃⁻. In aerobic...
    Resource Type:
    Masters Thesis
    Full Text:
    cause the accumulation of NH3, NO2 - and the greenhouse gases NO and N2O, compounds that can be

  • Structural analysis of thermally inactivated nisin

    Creator:
    Musafija-Jeknic, Tamara
    Abstract:
    Nisin, an antimicrobial peptide used in food preservation was evaluated for thermal stability. Nisin retained antimicrobial activity after having been heated at 121°C for seven hours. Anhydrous nisin and concentrated nisin solutions (5-10 mg/ml) were still active after having been heated up to 190°C or 230°C. When exposed to high...
    Resource Type:
    Masters Thesis
    Full Text:
    . Technical Information Sheet: The Safety of Nisin as a Food Additive.Technical Data Ref. No. 2/88. England

  • Bacterial Predation in Host Microbiomes

    Creator:
    Welsh, Rory M.
    Abstract:
    In host-associated microbiomes, the mechanisms that regulate community composition or the principles that govern dynamics remain far from clear. However, understanding how the structure of microbial communities shift as the system moves away from a healthy state is critical to assessing disease progression and to formulate any potential mitigation strategy....
    Resource Type:
    Dissertation
    Full Text:
    addition of Halobacteriovorax alone had only minor effects on the microbiome, and no infiltration of

  • A comparative study of fish coloration and toxicant responses in a chromatophore cell-based biosensor

    Creator:
    Roach, Holly B.
    Abstract:
    Detection of both biological and chemical environmental toxicants is essential in the assessment of risk to human health. Cell-based biosensors are capable of activity- based detection of toxicity. Chromatophore cells, responsible for the pigmentation of poikilothermic animal, have shown immense potential as cell-based biosensors in the detection of a broad...
    Resource Type:
    Masters Thesis
    Full Text:
    provided me with a wealth of information about effective teaching and has helped me to want to become a

  • Analysis of segregants of F'gal heterogenotes in Escherichia coli

    Creator:
    Kurahara, Carole Mahaney
    Abstract:
    The purpose of this study was to isolate and characterize any segregants of the heterogenotes formed from sexduction by an F' donor. Following the mating of F' W4520, carrying an F' gal₁⁺ gal₂⁺ factor, with W3350, a gal₁⁻ gal₂⁻ recipient, a number of recombinant clones were picked and examined for...
    Resource Type:
    Masters Thesis
    Full Text:
    to produce recombinants in these crosses was taken as evidence that no F factors of the gal+ type

  • Occurrence of the protozoan fish parasite Ceratomyxa shasta in the Deschutes River basin and the ultrastructure of the spore

    Creator:
    Gould, Rowan Wayne
    Abstract:
    The purpose of this paper was twofold, (1) to determine the distribution of the infective stage of Ceratomyxa shasta (Noble) in the Deschutes River basin, and (2) to study the ultrastructure of the spore stage of the protozoan parasite. Liveboxes containing juvenile rainbow trout were placed at specific test points...
    Resource Type:
    Masters Thesis
    Full Text:
    , electron dense circular bodies, mitochondria and ribosome. packets. The polar capsule and filament of C

  • Factors affecting the Ceratomyxa shasta infectious cycle and transmission between polychaete and salmonid hosts

    Creator:
    Bjork, Sarah J.
    Abstract:
    Ceratomyxa shasta is a myxozoan parasite that infects salmonid fishes causing the disease ceratomyxosis that is characterized by severe hemorrhage and necrosis of the intestine and death of the fish host. Ceratomyxa shasta is endemic to the Pacific Northwestern United States and Canada, where epizootics are reported for both wild...
    Resource Type:
    Dissertation
    Full Text:
    blood. When the infection of susceptible and Resistant Chinook salmon were compared, there were no