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Filtering by: Creator Crutchfield, Stephen R. Remove constraint Creator: Crutchfield, Stephen R. Committee Member Giovannoni, Stephen Remove constraint Committee Member: Giovannoni, Stephen

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  • Impacts of microbial chemical interactions on marine plankton physiology

    Creator:
    Moore, Eric R.
    Abstract:
    The bioavailability of chemical compounds in the marine environment fundamentally influences the growth and physiology of microorganisms. Organic and inorganic chemicals that are produced by some marine plankton can be consumed by other plankton for energy production, growth, or to initiate essential physiological processes. Cultures of the diatom Thalassiosira pseudonana,...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Eric R. Moore for the degree of Doctor of Philosophy in Microbiology presented on December

  • Characterization of neuronal nitric-oxide synthase reductase activity

    Creator:
    Wolthers, Kirsten R.
    Abstract:
    During catalysis the flavoprotein domain of neuronal nitric-oxide synthase (nNOS) shuttles NADPH-derived reducing equivalents from FAD to FMN and then to the P450-heme enabling heme-based oxygen activation and subsequent NO-synthesis. The binding of Ca²⁺-activated calmodulin (Ca²⁺-CaM) to nNOS alleviates inhibition of flavin mediated electron transfer within the diflavin domain, which...
    Resource Type:
    Dissertation
    Full Text:
    ABSTRACT OF THESIS Kirsten R. Woithers for the degree of Doctor of Philosophy in Biochemistry and

  • Properties of methyl bromide cooxidation by ammonia-oxidizing bacteria

    Creator:
    Duddleston, Khrystyne Noel
    Resource Type:
    Dissertation
    Full Text:
    experiments, and to my other committee members, Dr. Stephen Giovannoni and Dr. Jennifer Field. Thanks are

  • Seconds to hour scale photosynthetic responses in marine microalgae

    Creator:
    Laney, Samuel R.
    Abstract:
    Our view of phytoplankton has historically revolved around their inability to control their location in space. The term phytoplankton itself underscores this particular difference between phytoplankton and their sessile terrestrial counterparts. Yet there are other differences between land plants and the phytoplankton that are perhaps equally important, beyond this sessile-planktonic...
    Resource Type:
    Dissertation
    Full Text:
    THE DISSERTATION OF Samuel R. Laney for the degree of Doctor of Philosophy in Oceanography presented

  • Elucidating the Origins of Trends and Selectivities of Organic Reactions through Computations and Data Analysis Techniques

    Creator:
    Richardson, H. Camille
    Abstract:
    In this dissertation, a novel method for analyzing computed transition states (TS) for organic reactions is disclosed. It introduces the use of localization-delocalization matrices as parameters in a linear free energy relationship to determine the transition state interactions responsible for differences in energy between the major and minor TS in...
    Resource Type:
    Dissertation
    Full Text:
    differences in energy in these P-N heterocycles due to R substituents, most notably a multiple linear

  • Community composition and activities of denitrifying bacteria in soils

    Creator:
    Rich, Jeremy J.
    Abstract:
    Few studies have directly compared denitrifying community composition and activities in soils by coupling molecular-genetic techniques and traditional measures of denitnfication. I investigated communities of denitrifying bacteria from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the denitrification pathway, N₂O reductase (nosZ), served as...
    Resource Type:
    Dissertation
    Full Text:
    : Stephen Giovannoni for giving career advice and influencing my Ph.D. instruction through two courses

  • Bioinformatics applied to freshwater cyanobacterial blooms and cyanophage

    Creator:
    Schwartz, Andrew D.
    Abstract:
    Freshwater cyanobacterial blooms are a nuisance and health threat in the Pacific Northwest. The accepted methods of characterizing these blooms by microscopic cell counts cannot differentiate between toxic and non-toxic strains of the cyanobacterium Microcystis. Also, there is limited understanding of freshwater cyanophage that may control bloom dynamics. In order...
    Resource Type:
    Masters Thesis
    Full Text:
    leucine (L) and Z is arginine (R). The synthetase gene cluster is shown above for Microcystis. Flanking

  • Fecal Bacteroidetes host distributions and environmental source tracking

    Creator:
    Dick, Linda K.
    Abstract:
    Contamination of recreational and shellfish waters with fecal pollution is a major water quality issue with associated economic impacts and human health risks. Reliable fecal source identification and rapid, quantitative analyses are essential components of risk assessment. Enteric bacteria that are endemic to specific hosts have a potential role as...
    Resource Type:
    Dissertation
    Full Text:
    advice: Drs. Stephen Giovannoni, Dan Rockey, Andy Karplus, and Alex Stone. I thank T.J. Brodeur, Mike

  • Molecular markers from fecal anaerobes to identify nonpoint source pollution in coastal waters

    Creator:
    Bernhard, Anne E.
    Resource Type:
    Dissertation
    Full Text:
    my major professor, Dr. Katharine Field, and my committee members, Drs. Stephen Giovannoni, James

  • Information Processing in Multicellular Networks

    Creator:
    Potter, Garrett D.
    Abstract:
    The ability for individual cells and multicellular networks to process information contained in perceived stimuli is of vital importance to their proper functioning and ultimately their cellular fate. The primary mechanism employed by cells to this end is the use of biochemical signaling in which a series of molecular events...
    Resource Type:
    Dissertation