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  • A Multi-Tiered Approach Using Daphnia magna to Assess Chlorpyrifos Risk to Aquatic Receptors

    Creator:
    Maggio, Stephanie A.
    Abstract:
    Chlorpyrifos (CPF) is a widely used broad-spectrum organophosphate insecticide. Following exposures, CPF and its more toxic oxon metabolite (CPFO) elicit neurotoxic effects by inhibiting the activity of the acetylcholinesterase enzyme (AChE), resulting in altered fitness and death at high doses. Following exposure, organisms bioactivate CPF to CPFO through the Cytochrome...
    Resource Type:
    Dissertation

  • Impacts of Climate Change on Fuel Management Decisions and Implications for Fire Risk

    Creator:
    Kato, Nozomi
    Abstract:
    Private forest owners face an increasing risk of economic damage from extreme wildfires as the climate becomes warmer and drier. This thesis empirically estimates the influence of climate on private forest owners’ management decisions using plot-level data in the Pacific states of the U.S. Econometric models are specified where the...
    Resource Type:
    Masters Thesis
    Full Text:
    including an element of Bayesian analysis and Dr. William Jaeger, for providing thoughtful insights on how

  • Toxicogenomic Biomarkers Associated with PAH Carcinogenic Potential in a 3D in Vitro Bronchial Epithelial Model

    Creator:
    Chang, Yvonne
    Abstract:
    The environmental health science community recognizes polycyclic aromatic hydrocarbons (PAHs) as a re-emerging class of environmental pollutants due to their persistence and prominence in mixtures of concern. Due to their widespread distribution in the environment, exposure to PAHs often occur as complex chemical mixtures. Exposures are linked to numerous adverse...
    Resource Type:
    Dissertation
    Full Text:
    , regulation of epithelial mesenchymal transition, regulation of angiogenesis, and cell cycle G2-M. In

  • On the Topologies of Moduli Spaces of Polygons: A Taxonomic Approach

    Creator:
    Krughoff, Stephen A.
    Abstract:
    Consider a polygon lying in the Euclidean plane with labeled edge lengths. The moduli space of polygons is the space of all polygons with the same labeled edge lengths, modulo orientation preserving isometries. It is well known that this space is generically a smooth manifold. For certain combinations of edge...
    Resource Type:
    Dissertation
    Full Text:
    polytope P Hp(f) The Hessian of f : M → R at p ∈M Pn The subspace of P̄n of unit perimeter n-gons Sn The

  • Enumeration Problems on Symmetries of Riemann Surfaces

    Creator:
    Camacho, Charles A.
    Abstract:
    We describe two combinatorial problems in the theory of automorphism groups of compact Riemann surfaces of genus two or greater: enumerate the topological actions of a finite group on surfaces and determine the set of genera of surfaces admitting such a group action, called the genus spectrum. We illustrate results...
    Resource Type:
    Dissertation
    Full Text:
    thank William Bogley for suggesting I study a family of finite groups; Thomas Schmidt for connecting me

  • Exploratory Studies Within the Exotic Lyonsite Structure

    Creator:
    Tang, Joseph N.
    Abstract:
    Structure-property relationships have always underpinned the field of solid state chemistry; dependable structural descriptions are integral to understanding and controlling the physical properties of inorganic compounds old and new. While a handful of crystal structures are celebrated for their versatility, flexibility, and functionality, the existence of more exotic structures is...
    Resource Type:
    Dissertation
    Full Text:
    Cheong, Greg Herman, and William Warnes for their time and commitment as my committee members. I would

  • Peace, But Not at Any Price : The Effects of Rapid Military Demobilization on US Foreign Policy and the Progression of the Nuclear Arms Race 1945-1953

    Creator:
    Jones, Sean G.
    Abstract:
    The research conducted here originated with the question of what caused the massive build-up of nuclear arsenals, which included ever larger and more powerful bombs and delivery systems from them, in the United States and the Soviet Union, even though the consensus beforehand was that nuclear energy should be prohibited...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Christopher M. Nichols

  • Characterization of a Transgenic Mouse for Human Cytochrome P450 1B1 (CYP1B1)

    Creator:
    You, Hyekyoung Hannah
    Abstract:
    Cytochrome P450 1B1 (Cyp1B1) is a xenobiotic metabolizing enzyme, responsible for polycyclic aromatic hydrocarbon (PAH) oxidative metabolism. CYP1B1 metabolically activates several species of environmentally relevant procarcinogenic PAHs to reactive carcinogens. PAHs are aryl hydrocarbon receptor (AhR) agonists, leading to CYP1B1 upregulation. Though CYP1B1 is highly conserved across species, wild type...
    Resource Type:
    Honors College Thesis
    Full Text:
    Environmental and Molecular Toxicology/Linus Pauling Institute William M. Baird, Committee Member

  • Development of new high-temperature piezoelectric perovskite ceramics

    Creator:
    Ansell, Troy Youngmin
    Abstract:
    Lead zirconate titanate (PZT) is the dominant ferroelectric material in the market due to its excellent piezoelectric properties, relatively high Curie transition temperature (T[subscript C]), low cost, etc. However, because of emerging applications with requirements for high temperature (T[subscript C] > 400 °C) ferroelectrics, researchers are increasingly looking at alternative...
    Resource Type:
    Dissertation
    Full Text:
    loss. Reprinted, with permission, from A. J. Moulson and J. M. Herbert; Electroceramics: Materials

  • Oregon State University Student Electoral Participation, 2006-2010

    Creator:
    Bene, Heather T.
    Abstract:
    This study examines student voting at Oregon State University (OSU) – Oregon’s public, land-grant university – in state elections from 2006-2010. The National Voter Registration Act of 1993 (NVRA), Oregon Senate Bill 951 (2007), and Oregon House Bill 2880 (2011) seek to increase university student voting. In particular, SB 951...
    Resource Type:
    Capstone Project