Index Catalog // ScholarsArchive@OSU

The European Green Crab (Carcinus maenas) in Oregon: A Preliminary Survey of Yaquina, Coos, Winchester and Siletz Bays

Creator:: Angel, Tiah, Bassett, Zasha, Chipman, Brian, Cleveland, Kimberly, Cronick, Tamisha, Ehlig, Janette, Frerich, Dan, Hunt, Chris, Ison, Todd, McGuire, Angela, Oliver, Jennifer, Schmelter, Anja, and Whitsett, Jennifer
Abstract:: http://people.oregonstate.edu/~yamadas/crab/rephome.htm
Resource Type:: Research Paper

Redox processes in a seasonally reduced riparian zone soil ecosystem

Creator:: Roland, Rio W.
Abstract:: Seasonal reducing conditions play an important role in the cycling of nutrients and soil pore water chemical constituents in the Willamette Valley. Long periods of soil saturation lead microorganisms utilizing organic matter as their carbon source to find alternative electron acceptors other than oxygen. Once oxygen has been depleted microorganisms...
Resource Type:: Undergraduate Thesis

Quantitative determination of DCPA and its metabolites using strong anion exchange solid-phase extraction with gas chromatography/electron capture detection

Creator:: Monohan, Keith
Abstract:: Rapid and accurate analytical methods are needed to assess the impacts of agricultural chemicals on soil and water resources. Solid-phase extraction (SPE) was evaluated as an alternative method to conventional liquid-liquid extraction for the quantitative analysis of the herbicide DCPA and its metabolites in ground waters. Strong anion exchange (SAX)...
Resource Type:: Undergraduate Thesis

Progestin analysis by gas chromatography/mass spectrometry in plasma and feces of horses, cattle, and sheep

Creator:: Miller, C. W.
Abstract:: Much interest has recently been shown in using fecal samples to monitor hormone concentrations in free-roaming animal populations. This process is noninvasive and, therefore, provides easy sample collection and assures no stress-related, physiological responses that might alter the hormonal data. Concerns have been expressed, however, that the hormone concentrations detected...
Resource Type:: Undergraduate Thesis

Pathogenicity to western larch (Larix occidentalis) of two fungi, Ophiostoma oseudotsugae and Leptoaraghium abietinum, associated with the douglas-fir beetle (Coleoptera: Scolytidae) in Eastern Oregon, U.S.A.

Creator:: Neal, Tiffany A. and Ross, Darrell W.
Abstract:: Pole-sized, live western larch Larix occidentalis Nutt.) were inoculated with Ophiostoma pseudotsugae(Rumb.) von Arx or Leptographium abietinum (Peck) Wingf., two blue stain fungi associated with the Douglas-fir beetle (Dendroctonous pseudotsugae Hopkins), to assess their pathogenicity. Inoculation with O. pseudotsugae resulted in a significantly greater percentage of necrotic phloem compared to...
Resource Type:: Undergraduate Thesis

Microbial degradation of linear alkylbenzenesulfonates in sewage contaminated groundwater

Creator:: Eby, Sean D.
Abstract:: Surfactants, or surface active agents, are the active ingredients in detergents used for domestic cleaning applications, such as dish washing and laundering. They are effective cleaning agents by concentrating at interfacial regions, lowering the surface tension of water, and forming micelles that solubilize oils (West, 1992). Surfactants are amphiphilic, because...
Resource Type:: Undergraduate Thesis

Measurement of relative fitness of dicarboximide-resistant botrytis cinerea in strawberry leaves

Creator:: Glass, Jenny
Abstract:: Leaves of healthy strawberry plants were inoculated with either vinclozolin-sensitive or vinclozolin-resistant isolates of Botrytis cinerea at one of three concentrations: 5x104, 1x105, and 5x105 conidia/ml. One week following inoculation, representative leaves were harvested and cut into 9mm2 leaf pieces. Some pieces were immediately plated onto selective Botrytis medium while...
Resource Type:: Undergraduate Thesis

Incorporation of aerodynamic and boundary layer resistances in determining initial evaporation rates of pesticides from turf grass

Creator:: Conway, Michael
Abstract:: Evaporative loss rates of pesticides, following application to turfgrass, were measured using the Backward-Time Lagrangian stochastic Dispersion model (Flesch, Wilson, Journal of Applied Meteorology, 34, pp. 1320-1332. All pesticides were applied to a 22.8 m x 22.8 m orchard ryegrass turf plot near Corvallis, Oregon. Solar radiation, ambient temperature, surface...
Resource Type:: Undergraduate Thesis

In vitro mechanisms of chlorophyllin antimutagenesis against dibenzo[[alpha],l]pyrene

Creator:: Barth, Marita C.
Abstract:: Polycyclic aromatic hydrocarbons (PAHs) are a class of usually planar compounds consisting of fused aromatic rings that are formed by the incomplete combustion of organic materials. PAHs are ubiquitous in the environment, coming from a number of sources, such as cigarette smoke, the burning of wood for residential heating, and...
Resource Type:: Undergraduate Thesis

Gut content analysis of juvenile shortnose suckers Chasmistes brevirostris Cope, 1879

Creator:: McDonald, Pat
Abstract:: Ontogenetic niche shifts are critical times in a fish's life that need to be passed for survival, growth and recruitment (Gerking 1994, Osenberg et al. 1994). These niche shifts are identified by a change in feeding from one prey type to another. These shifts in feeding occur throughout growth and...
Resource Type:: Undergraduate Thesis

Genetic analysis of BYVD resistance and low temperature tolerance in winter x spring barley crosses

Creator:: Zitzewitz, Jarislav W. von
Abstract:: The development of winter 6-row malting barley varieties is an objective of the OSU program. The program's winter germplasm is quite susceptible to Barley Yellow Dwarf Virus (BYDV). The program recently released the spring 2-row variety Orca, which carries the Yd2 gene for BYDV resistance. The objective of this project...
Resource Type:: Undergraduate Thesis

Feasibility of Corbicula flumina as abiomarker for environmental pollutants in the Willamette River

Creator:: Lauderbach, Douglas
Abstract:: This report examines the feasibility of using the bivalve Corbicula flumina as a biomarker for environmental contaminants in the Willamette River. Compounds such as DDT, dioxins, furans, and PCBs persist in the environment, pose health related concerns, and due to their lipophilic nature accumulate in biological organisms. The success of...
Resource Type:: Undergraduate Thesis

Evaluation of popcorn cultivars as resistant rotation crops to Columbia root-knot nematode : A systems approach

Creator:: Cardwell, Derek
Abstract:: This study examined the management situation for the Columbiaroot-knot nematode (Meloidogyne chitwoodi) in potato, using an approach with systems thinking and interactive meetings. The focus of current research for control of this nematode was evaluated. Control practices include crop rotation, and this study also evaluated popcorn cultivars for their potential...
Resource Type:: Undergraduate Thesis

Dormancy phase of Nitrosomonas europaea : The inducement and temporary suspension of dormancy phase and the effects on AMO and HAO

Creator:: Hicks, Deborah A.
Abstract:: Nitrosomonas europaea is an autotrophic ammonia-oxidizer that has been found to cometabolize various halogenated hydrocarbons. This ability to cometabolize various compounds (many of which are considered contaminants) has caused N. europaea to be considered a potential bioremediational organism. However, ifN. europaea is to be used for bioremediation purposes, it will...
Resource Type:: Undergraduate Thesis

Development of viticultural practices to improve winegrape performance : effect of crop level on fruit composition of Pinot noir grapes grown in the Northern and Central Willamette Valley, Oregon

Creator:: Taylor, Patrick
Abstract:: A broad range of factors influence wine grape quality and manipulation of these factors has stimulated interest among grape growers, wine makers, and research scientists alike. One such factor affecting wine grape quality is crop level, particularly for Pinot noir. Since the capacity of a vine to ripen fruit depends...
Resource Type:: Undergraduate Thesis

Development and evaluation of conservation tillage for squash in Western Oregon

Creator:: Reich, Brandon M.
Abstract:: Squash varieties of Golden Delicious and Squash Hybrid NK 530 were grown in disk-till, strip-till, and no-till conservation tillage systems following a cover crop of'Monida' oats (Avena sativa L.) and common vetch (Vicia sativa L.). Tillage systems were evaluated for effects on squash emergence and yield, weed density and biomass,...
Resource Type:: Undergraduate Thesis

Detecting apoptosis in carcinogenexposed trout livers

Creator:: Zipperman, Michelle
Resource Type:: Undergraduate Thesis

Chromium and zinc uptake in Elodea densa and Ceratophyllum demersum : Applications for bioremediation

Creator:: Wilson, Jorie and Moore, James
Abstract:: South American waterweed, Elodea densa (Planch.) Casp., and Coontail Ceratophyllum demersum L., were studied for their potential to take up chromium and zinc and as a possible indicator of arsenic, cadmium, copper, and lead pollution. Plants were collected from the Willamette River in Oregon and exposed for 48 hours to...
Resource Type:: Undergraduate Thesis

Biological control of insects using entomopathogenic nematodes

Creator:: Bezdek, Tanya M.
Abstract:: Biological control is the action of predators, parasitoids, or pathogens to maintain a pest organism's population at lower numbers than would occur in the absence of the agent. Entomopathogenic nematodes can be used as biological control agents for insect pests. These nematodes infect insects and release a toxic bacterium that...
Resource Type:: Undergraduate Thesis

Biogeochemistry of inorganic P, Mn, and Fe in seasonally reduced soils of the Willamette Valley, Oregon

Creator:: King, Rex
Abstract:: Saturated soils undergo reduced conditions as microorganisms consume oxygen and require other terminal electron accepting processes for the mineralization of soil organic carbon. Currently, the soil redox potential has not been considered as important when sampling these soils for Fe, Mn, and P04. Since Fe- and Mn-oxides are electron sinks...
Resource Type:: Undergraduate Thesis

Analysis of disperse dyes and FD&C blue no. 1 as tracers for pesticides

Creator:: Pangia, Ruth A.
Abstract:: Contamination of water sources due to the use of agricultural chemicals can be minimized through understanding the transport relationships for organic chemicals in soil environments. In this study we evaluated seven non-hazardous dyes that have properties which were consistent with application as surrogates to organic agro-chemicals to assess mobility through...
Resource Type:: Undergraduate Thesis

A screening method for the essential oils in hops using solid-phase microextraction

Creator:: Heider, Chris
Abstract:: Separation and isolation of organic analytes from environmental matrices such as soils, water, plant, or animal tissue has traditionally involved the use of liquid solvent extractions. Solvent-based extraction methods are often time-consuming, difficult to automate, and use expensive solvents that generate hazardous waste and working conditions. The need for a...
Resource Type:: Undergraduate Thesis

A reassessment of the linkage of red leaf trait and incompatibility loci in hazelnut (Corylus avellana L.)

Creator:: Horton, G.
Abstract:: As in other species, it is possible that a homozygous red leafed (= redleaf) hazelnut (Corylus avellana L.) tree would have brighter red coloration than a heterozygote and thus be more desirable as an ornamental. However, 'Fusco Rubra' and `Rode Zeller' both carry incompatibility allele S6 (thus cross-incompatible) and are...
Resource Type:: Undergraduate Thesis

A comparison of the theoretical and practical components of the US and German higher-education systems; what we can learn from the German approach to better prepare our students for ever-changing technologies

Creator:: Brownell, Eugene Baars
Abstract:: The curriculum of technical degrees at higher education institutions in the United States needs to continuously adapt to ever changing technologies. One way to accomplish this is to adopt a more dynamic approach that separates the practical and theoretical components of the university education, and where the student concentrates on...
Resource Type:: Undergraduate Thesis

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