Search Constraints

Start Over
Filtering by: Creator Wheeler County (Or.) Remove constraint Creator: Wheeler County (Or.) License All rights reserved Remove constraint License: All rights reserved

Search Results

  • DNA UV damage-related control of ribonucleotide reductase : possible relationship to mutagenesis and the incidence of and attitudes toward skin cancer in several western nations

    Creator:
    Stenberg, John C.
    Abstract:
    Two strains of Escherichia coli were studied to determine the effect of constitutive expression of the SOS DNA damage repair response on the activity of ribonucleotide reductase. Activity of the reductase and cellular deoxynucleoside triphosphate (dNTP) pools were both determined before and after exposure of the cells to ultraviolet radiation....
    Resource Type:
    Honors College Thesis
    Full Text:
    ultraviolet radiation. The experiments showed no significant difference in enzyme activity or cellular dNTP

  • Dynamics of organic matter production and degradation during coastal diatom blooms

    Creator:
    Wetz, Michael S.
    Abstract:
    Experiments were designed to answer key questions about diatom-derived organic matter cycling (i.e., production and degradation) in coastal systems. Dissolved organic matter (DOM) production was examined in axenic batch cultures of five diatom species. Dissolved organic carbon (DOC) release rates varied between species, but were significantly higher for all species...
    Resource Type:
    Dissertation
    Full Text:
    : ________________________________________________________________________ Patricia A. Wheeler Experiments were designed to answer key questions about

  • The release of total and dissolved organic carbon from macroalgae and phytoplankton

    Creator:
    Kawasaki, Nobuyuki
    Abstract:
    Many phytoplankton and macroalgae release dissolved organic carbon (DOC). Many macroalgae also produce and store secondary metabolites which in some case have been shown to deter their grazers. The metabolites may be released into the surrounding seawater and could inhibit primary production. On the other hand, some phytoplankton can use...
    Resource Type:
    Masters Thesis

  • The distribution and partitioning of dissolved organic matter off the Oregon Coast : a first look

    Creator:
    Hill, Jon K.
    Abstract:
    The purpose of this thesis is to provide a first look at the spatial and temporal distributions of dissolved organic material (DOM) off the Oregon coast of North America. While this paper is not a comprehensive examination of these distributions, several patterns are identified as promising candidates for continued research....
    Resource Type:
    Masters Thesis
    Full Text:
    size. DOM is whatever goes through a 0.2 (Libby and Wheeler, 1997), 0.45 (Wangersky, 1993), or 0.7 m

  • An investigation into nitrogen uptake by Emilania huxleyi during continuous darkness

    Creator:
    Royer, Ida M.
    Abstract:
    Experiments were conducted with two strains of the coccolithophorid Emiliania huxleyi. Previous experiments with CCMP1742 and 372 at a light intensity of 60 µEin/m²-s showed that during five-day periods of continuous darkness, strain 1742 was taking up nitrate from the media while strain 372 was not. The nitrate uptake in...
    Resource Type:
    Masters Thesis
    Full Text:
    uptake or PN accumulation occurred in strain 372, in agreement with previous findings. No accumulation

  • John Archibald Wheeler : a study of mentoring in modern physics

    Creator:
    Christensen, Terry M.
    Abstract:
    This dissertation has two objectives. The first objective is to determine where best to situate the study of mentoring (i.e. the 'making of scientists') on the landscape of the history of science and science studies. This task is accomplished by establishing mentoring studies as a link between the robust body...
    Resource Type:
    Dissertation
    Full Text:
    feature John Wheeler as either the interviewee or a prominent subject of discussion. The project also

  • The spectral backscattering properties of marine particles

    Creator:
    Whitmire, Amanda L.
    Abstract:
    The inherent and apparent optical properties of different ocean regimes are the basis for all optical remote sensing of the ocean. Ecological information derived from remote sensors therefore relies on having a detailed understanding of how particulate backscattering and absorption contribute to the bulk optical signal. The absorption characteristics of...
    Resource Type:
    Dissertation
    Full Text:
    , Emmanuel Boss, W. Scott Pegau, Patricia Wheeler, and my graduate representative Skip Rochefort. My major

  • Gender and Race Stereotypes in Advertisements in Science, 2004-2006

    Creator:
    Atwood-Wheeler, Kathryn
    Abstract:
    This study documents the occurrence of stereotypical representations of gender, race, and other characteristics in individuals that appear in advertisements in the prestigious academic journal Science. It repeats and expands upon a study conducted by Mary Barbercheck (2001) that analyzed advertisements in Science between 1995 and 1997. In this study,...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Kathryn Atwood-Wheeler

  • Modeling and analysis of a heat transport transient test facility for space nuclear systems

    Creator:
    Wheeler, Adam
    Abstract:
    The purpose of this thesis is to design a robust test facility for a small space nuclear power system and model its physical behavior under different scenarios. The test facility will be used to simulate a 1-10kWe nuclear reactor, its electrical generation, and heat removal capabilities. This simulator will be...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS OF Adam Wheeler for the degree of Master of Science in Nuclear Engineering presented on March

  • Intrinsic and extrinsic quality of West Coast albacore tuna (Thunnus alalunga)

    Creator:
    Wheeler, Sena C.
    Abstract:
    The purpose of this study is to identify the intrinsic and extrinsic quality characteristics of West Coast albacore tuna (Thunnus alalunga). Albacore tuna were troll caught off the Oregon coast and transferred to the Oregon State University Seafood laboratory in Astoria, Oregon. Core samples were extracted from six designated body...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Sena C. Wheeler for the degree of