In order to determine the physical location of contaminants in soil, two solidified soil
"thin" sections, which preserve the undisturbed structural characteristics of the original
soil, containing weapons-grade plutonium from the Rocky Flats Environmental Test Site
were prepared. Two autoradiographic methods were used in radionuclide mapping:
contact autoradiography using CR-39®...
Precise in situ measurement of the spectral absorption and scattering coefficients in several regions has revealed patterns in the distribution of the inherent optical properties on spatial scales that were previously unobtainable. The precision of the measurements was found to be consistent and unbiased across a variety of oceanic regimes...
Optimization of preparative nonlinear chromatography was carried out for
the first time for a biomolecule mixture. Conventional wisdom on optimization,
which roots from analytical chromatography, dictates optimizing resolution in an
analytical column and obtaining similar separation in a large column for isolation.
Such a method of optimization significantly under uses...
E. coli thioredoxin (TRX) was modified by the episulfonium ion derived from S-(2-chloroethyl)glutathione (CEG) or S-(2-chloroethyl)cysteine (CEC). The alkylation site was located at Cys-32, which was confirmed by tandem mass spectrometry. Two forms of native TRX, Oxi- and Red-TRX, and two modified TRXs, GS- and Cys-TRX, were examined by hydrogen/deuterium...
A series of studies, in three western Oregon Douglas-fir plantations, was conducted to understand the physiological impacts of Swiss needle cast on Douglas-fir physiology. Four aspects of the disease complex were investigated: fungal colonization and assessment, plant-water relations, carbon assimilation and interaction with climate. Several techniques were developed and used...
This research explores the lived experiences and career decision making styles of three Vietnamese refugees in the United states. Since this study involves the lived experience of the participants pertaining to their everyday activities (i.e. living, making decision, and working in the United States), the phenomenological approach (Van Manen, 1990;...
The characteristics of an inhibitor of infectious pancreatic necrosis virus (IPNV)
found in normal rainbow trout serum (RTS) were studied. The serum inhibitor had a
molecular weight of approximately 150 kDa and was dependent on divalent cations,
either Ca²⁺ or Mg²⁺. It was stable at temperatures up to 50°C and...
An integrated model combining a wildlife population simulation model, and timber harvest and growth models was developed to explore the tradeoffs between the likelihood of persistence of a wildlife species and timber harvest values on a landscape in the Central Oregon Cascades. Simulated annealing, a heuristic optimization technique, was used...
Viability analysis of well-selected focal species can complement other types of conservation planning by revealing thresholds in habitat area and landscape connectivity that may not be evident from ecosystem-level evaluations. I used focal species analysis of five carnivores to suggest conservation planning guidelines for the Rocky Mountains and adjacent areas...
This dissertation addresses two topics on market imperfections. First, chapter
2 presents a theoretical model that focuses on problems associated with informational
asymmetry. The model presents a dynamic signaling game between a monopolist
manufacturer and a monopolist retailer, where demand is uncertain and only the
retailer is privately informed. This...