Index Catalog // ScholarsArchive@OSU

Diel activity patterns in demersal fishes on Heceta Bank, Oregon

Creator:: Hart, Ted
Abstract:: Most fishes exhibit differences in activity patterns from day to night, with a switch from high to low activity at dusk and reverse at dawn. Marine reef fishes show similar behavior among sites, despite dissimilar species assemblages, suggesting that common selection pressures are leading to convergent behavior. Few studies to...
Resource Type:: Masters Thesis
Full Text:: Wakefield, Douglas Markle, and Tom Savage. I would also like to thank Mary Yoklavich and Brian Tissot for

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

Creator:: Bromley, Sarah Ashley
Abstract:: Inheritance from pre-existing mantle domains and fluid and melt contributions from active subduction together produce the geochemical signatures of mantle-derived arc basalts. In this context, this work evaluates the evolution of Cascadia mantle sources by documenting the isotopic and compositional characteristics of primitive basalts along a transect across the Eocene-Oligocene...
Resource Type:: Masters Thesis

Systematics and phylogeny of Cordyceps and the Clavicipitaceae with emphasis on the evolution of host affiliation

Creator:: Sung, Gi-Ho
Abstract:: Cordyceps is a genus of perithecial ascomycetes. It includes over 400 species that are pathogens of arthropods and parasites of the truffle genus Elaphomyces. Based on the morphology of cylindrical asci, thickened ascus apices and filiform ascospores, it is classified in the Clavicipitaceae (Hypocreales), which also includes endophytes and epiphytes...
Resource Type:: Dissertation

Roles of homeodomain transcription factors during organogenesis

Creator:: Xu, Jun
Abstract:: The spatial and temporal patterning of sequence specific transcription factors (SSTFs) contributes to cell type specification and organ formation during embryogenesis. Homeodomain transcription factors are evolutionally conserved among invertebrate and vertebrate animals. They are responsible for body segmentation and organogenesis. Lbx1 and Pitx2 both are homeodomain transcription factors contributing to...
Resource Type:: Dissertation

A comparative analysis of morphological, physiological, and biochemical adaptation to abiotic stress in intertidal porcelain crabs, genus Petrolisthes

Creator:: Stillman, Jonathon Harris
Abstract:: Organismal tolerance to abiotic environmental stresses contributes significantly to setting the distribution limits of organisms, as demonstrated by vertical zonation patterns in the marine intertidal zone. In this thesis, the ultimate (evolutionary) and proximate (mechanistic) causes of tolerance to temperature and emersion stresses associated with the intertidal zone were examined...
Resource Type:: Dissertation
Full Text:: colleagues during parts of the past six and a half years: (in no particular order) Gene Williams, Tom Dietz

The GED certificate as a credential for entry into and retention in the workforce : recipient and employer perceptions

Creator:: Mason, Roy B.
Abstract:: The purpose of this research was to assess the use of the General Educational Development Tests (GED) as an alternative high school credential in Oregon. A study was conducted of 469 Oregon GED recipients' and 646 private sector employers' perceptions of the GED. Both quantitative and qualitative measurements were used...
Resource Type:: Dissertation
Full Text:: me to the discipline and rigor of scientific investigation and Dr. Tom Grigsby who showed me how to

Adaptive significance of polyploidy in brine shrimp (Artemia parthenogenetica)

Creator:: Zhang, Lei
Resource Type:: Dissertation
Full Text:: , Dr. Tom Dietz, Dr. Elizabeth Dahlhoff, Dr. Lin Chai, Mr. Randy Bender and Mr. Jonathon Stillman for

Effects of pasture and management variables on forage intake by grazing sheep

Creator:: Lewis, Robert David
Abstract:: Grazing experiments were conducted in summer, autumn and winter to assess the effects of stock density, grazing duration, pre-grazing pasture mass and stock type on forage intake by sheep grazing at high stock densities for short durations. In summer and winter, sheep were stocked at 200 sheep/ha on 0.1 ha...
Resource Type:: Dissertation
Full Text:: Jordan; for inspiration Malcolm MacLeod and Sandy McLennan; and, for refreshing breaks from it all John

Cytokinin oxidase activity from Phaseolus vulgaris L. cv. Great Northern callus tissues

Creator:: Chatfield, J. Mark
Abstract:: Cytokinin oxidase activity in callus tissues of Phaseolus vulgaris L. cv. Great Northern has been examined using an assay based on the oxidation of radioactively labeled N⁶ -(Δ² -isopentenyl) adenine (i⁶Ade) to adenine (Ade). Conditions for the quantitative extraction and assay of the enzyme have been established. The substrate specificity...
Resource Type:: Dissertation
Full Text:: graduate student. I also wish to thank my graduate committee, Dr. David Mok, Dr. Roy Morris, Dr. Tom

A National Five-Year Exploratory and Descriptive Analysis of Two-Year Public College Graduation Rates at Branch Compared to Non-Branch Campuses

Creator:: Harrison, Faimous J. L.
Abstract:: Branch campuses play an important part in postsecondary degree attainment by providing place-bound students from diverse socioeconomic backgrounds in different geographical regions access to education that is convenient. Their heterogeneousness structures, including enrollment size, communities, and populations served, are not accurately reflected in the majority of the research. Currently, there...
Resource Type:: Dissertation

ScholarsArchive@OSU

Diel activity patterns in demersal fishes on Heceta Bank, Oregon

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

Systematics and phylogeny of Cordyceps and the Clavicipitaceae with emphasis on the evolution of host affiliation

Roles of homeodomain transcription factors during organogenesis

A comparative analysis of morphological, physiological, and biochemical adaptation to abiotic stress in intertidal porcelain crabs, genus Petrolisthes

The GED certificate as a credential for entry into and retention in the workforce : recipient and employer perceptions

Adaptive significance of polyploidy in brine shrimp (Artemia parthenogenetica)

Effects of pasture and management variables on forage intake by grazing sheep

Cytokinin oxidase activity from Phaseolus vulgaris L. cv. Great Northern callus tissues

A National Five-Year Exploratory and Descriptive Analysis of Two-Year Public College Graduation Rates at Branch Compared to Non-Branch Campuses

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