Search Constraints

Start Over
Filtering by: Creator Pashak, Jeffrey J. Remove constraint Creator: Pashak, Jeffrey J. Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

Search Results

  • Hemoglobin adducts of the organophosphate insecticide azinphos-methyl

    Creator:
    Bailey, Bonnie J.
    Abstract:
    Reported here is an investigation to determine if azinphos-methyl (AZM), an organophosphate insecticide, adducts to hemoglobin, and if so, whether the hemoglobin adduct could be used as a quantitative marker of occupational AZM exposure. We hypothesized that AZM, or a metabolite of AZM, binds to hemoglobin in erythrocytes forming an...
    Resource Type:
    Dissertation
    Full Text:
    and Jeffrey J. Jenkins Reprinted with permission from Archives of Toxicology, in press. Springer

  • Characterization of Fungal Communities in Selected Wood Species by Field Exposure Tests

    Creator:
    Torres-Andrade, Paola A.
    Abstract:
    Fungi are the primary biological agents of wood deterioration and cause major economic losses of wood products globally. Wood in outdoor applications tends to remain wet for extended time periods, making it susceptible to fungal attack. Understanding the factors involved in fungal colonization of wood is important for developing improved...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: ______________________________________________________ Jeffrey J. Morrell

  • Water residence time and runoff generation in the western Cascades of Oregon

    Creator:
    McGuire, Kevin J.
    Abstract:
    The age, or residence time of water is a fundamental descriptor of catchment hydrology, revealing information about the storage, flow pathways and source of water in a single integrated measure. While there has been tremendous recent interest in residence time to characterize catchments, there are few studies that quantify residence...
    Resource Type:
    Dissertation

  • Hillslope hydrology : from patterns to processes

    Creator:
    Tromp-van Meerveld, Hilda J.
    Abstract:
    This dissertation re-examines the now standard perceptual model of hillslope hydrological response to rainfall, which includes the growth of a saturated wedge at the soil-bedrock interface or impeding layer. It also challenges the notion of bedrock impermeability and the assumption that the pattern of subsurface stormflow is determined by the...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ Jeffrey J. McDonnell This dissertation re-examines the now standard perceptual model of

  • Modeling changes in flexural properties of softwood beams during fungal decomposition

    Creator:
    Mitsuhashi Gonzalez, June M.
    Abstract:
    Moisture intrusion in residential structures can lead to substantial fungal decay and this damage costs billions in repair/replacement costs. The extent of damage and the rate at which it occurs are primarily dependent on the wood moisture content and temperature in the structure. Determining the risk of decay for various...
    Resource Type:
    Dissertation
    Full Text:
    Jeffrey J. Morrell Moisture intrusion in residential structures can lead to substantial fungal

  • Protein isoform-function relationships of single skeletal muscle fibers from weight-bearing and hindlimb suspended mice

    Creator:
    Stelzer, Julian E.
    Abstract:
    The goals of this research were to a) characterize the protein-function relationships of skeletal muscle single fibers from the mouse hindlimb b) examine mouse-strain related differences in myosin heavy chain composition (MHC) and single fiber contractile function, and c) quantify changes in fiber size and contractile function in response to...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved /Vf/Jeffrey J. Widrick The 2oals of this research were to a) characterize the protein

  • Hydro-biogeochemical coupling at the hillslope and catchment scale

    Creator:
    van Verseveld, Willem J.
    Abstract:
    The specific objectives of this dissertation are to determine subsurface flow behaviors across different antecedent wetness conditions from a top-down perspective and to mechanistically assess the hydrological controls on DOC and N transport at the hillslope and catchment scale. The study area is a small catchment where hillslopes issue directly...
    Resource Type:
    Dissertation
    Full Text:
    approved:______________________________________________________ Jeffrey J. McDonnell The specific

  • Beyond the paired-catchment approach : isotope tracing to illuminate stocks, flows, transit time, and scaling

    Creator:
    Hale, V. Cody
    Abstract:
    This dissertation integrates a process-based hydrological investigation with an ongoing paired-catchment study to better understand how forest harvest impacts catchment function at multiple scales. We do this by addressing fundamental questions related to the stocks, flows and transit times of water. Isotope tracers are used within a top-down catchment intercomparison...
    Resource Type:
    Dissertation
    Full Text:
    : _____________________________________________________________________ Jeffrey J. McDonnell This dissertation integrates a process-based hydrological

  • Ecohydrological mediation of water budget partitioning and time scales of subsurface flow in a seasonally semi-arid grassland

    Creator:
    Pangle, Luke A.
    Abstract:
    Understanding how the interactions and feedbacks between plant function, climate, and soils ultimately affects the terrestrial water balance and subsurface flow processes is major challenge in scientific hydrology. This dissertation summarizes the findings of a manipulative climate warming experiment, an observational field study that utilized stable-isotope tracers, and associated modeling...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ Jeffrey J. McDonnell Understanding how the interactions and feedbacks between plant

  • Biochemical and physiological indicators of behavioral impairment in salmonids exposed to chlorpyrifos and copper

    Creator:
    Sandahl, Jason
    Abstract:
    The purpose of this work was to determine if environmentally-relevant concentrations of chlorpyrifos and copper, two commonly detected chemicals in Western surface waters, can negatively impact the biological health of salmonids. Both compounds are highly neurotoxic to fish, but each with distinct biological target sites and mechanisms of action. We...
    Resource Type:
    Dissertation
    Full Text:
    Concentration Estimates for Acetyicholinesterase Inhibition. Jason F. Sandahi and Jeffrey J. Jenkins Oregon