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Filtering by: Creator Mulligan, Daniel M. Remove constraint Creator: Mulligan, Daniel M. Committee Member Arp, Daniel J. Remove constraint Committee Member: Arp, Daniel J. Language English [eng] Remove constraint Language: English [eng]

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  • An evaluation of factors influencing the management of Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae)

    Creator:
    Kepler, Ryan M.
    Abstract:
    The black vine weevil (BVW), Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae) is a persistent pest of nursery operations in the United States, feeding on over 140 species of plants. The goals of this research were to 1) assess the behavioral response of BVW to a commonly employed insecticide bifenthrin (Talstar 0.2G®)...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Ryan M. Kepler for the degree of

  • Control of alkane monooxygenase activity and expression in Pseudomonas butanovora

    Creator:
    Doughty, David M.
    Abstract:
    The regulation of monooxygenase enzymes has been demonstrated in bacteria that grow on methane and long chain-length alkanes (>C10). Less is known about monooxygenase regulation in short chain alkane oxidizing bacteria that grow on intermediate chain-length alkanes C2-C10. This dissertation focuses on the regulation of butane monooxygenase (BMO) expression and...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF David M. Doughty

  • Analysis of flavor precursors in radish and radish color extracts

    Creator:
    Kucza, Myriam M.
    Abstract:
    Radish anthocyanin extract has potential as a natural colorant because of its pigment stability and attractive red hue. Presence of undesirable aroma compounds could limit its applications in foods. The pungent principle of radish, 4-methylthio-3-butenyl isothiocyanate (MTBI), is produced enzymatically upon cell injury from its glucosinolate precursor, 4-methylthio-3-butenyl glucosinolate (MTBG),...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Myriam M. Kucza for the degree of

  • Vaccinia virus I7L core protein proteinase

    Creator:
    Byrd, Chelsea M.
    Abstract:
    Vaccinia virus (VV) is a large double-stranded DNA virus that is a prototypic member of the orthopoxvirus family. Previous works has showed that three of the major structural proteins found within the mature VV virion core 4a, 4b, and 25K are produced from higher molecular weight precursors at late times...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Chelsea M. Byrd for the

  • Characteristics of bradyrhizobium sp. recovered from Oregon soils

    Creator:
    Cheng, Hsin-hua
    Abstract:
    Although the biology of Bradyrhizobium has been studied for almost one hundred years, virtually nothing is known about the ecology and genetic variation in natural soil populations of this genus. The majority of information has been obtained from studies of one species, Bradyrhizobium japonicum, and the diversity within soil populations...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members, Dr. Daniel J. Arp, Dr. Stephen J. Giovannoni and Dr. Lynda M. Ciuffetti for their

  • Characterization of the molecular foundations and biochemistry of alkane and ether oxidation in a filamentous fungus, a Graphium species.

    Creator:
    Skinner, Kristin M.
    Abstract:
    Graphium sp., a eukaryotic alkanotroph, is able to oxidize small-molecular weight gaseous n-alkanes, diethyl ether and the branched ether, methyl tert butyl ether (MTBE). However, information regarding the biochemistry of fungal-mediated alkane and ether metabolism is limited, and questions regarding the identity of alkane oxidation catalysts and the genetic underpinnings...
    Resource Type:
    Dissertation
    Full Text:
    THE DISSERTATION OF Kristin M. Skinner for the degree of Doctor of Philosophy in Botany and Plant

  • 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:
    , and either 5 mM NO3 (A) or 18 M N20 (B), with and without C2H2........................ 54 3.2. Rates

  • 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:
    members, Dr. Daniel Arp and Dr. Jennifer Field, and to Dr. Linda Blythe. Special thanks to Dr. Larry

  • Inhibition, gene expression and modeling of ammonia oxidation in biofilms of Nitrosomonas europaea

    Creator:
    Lauchnor, Ellen Grace
    Abstract:
    This dissertation explores the physiology and gene expression of the ammonia-oxidizing bacterium Nitrosomonas europaea in surface-associated bacterial communities, or biofilms. Biofilms of N. europaea were cultivated in drip flow reactors for several weeks and gene expression microarrays were used to detect 240 genes differentially expressed between the mature biofilms and...
    Resource Type:
    Dissertation
    Full Text:
    μM phenol or 100 μM toluene, while 50% inhibition of suspended cells occurred at 8 μM phenol or 20

  • Toward understanding the nature of the soil microsite in relation to nitrogen and carbon cycling

    Creator:
    Cliff, John B.
    Abstract:
    My research has focused on understanding N and C cycling in soils at small scales. Isotope dilution methods commonly used to estimate gross rates of soil chemical transformations assume homogeneous distribution of label. I explored the effects of diffusion limitations on isotope dilution experiments in soil aggregates using spherical diffusion-reaction...
    Resource Type:
    Dissertation
    Full Text:
    support, and for allowing me enough rope to hang myself. I also thank Dr. Daniel J Arp, Dr. Roy Haggerty