This dissertation describes an investigation of DNA precursor supply for mitochondrial and nuclear DNA synthesis in HeLa cells and Mouse L-cells. HeLa cells were used for the quantitation of cellular and mitochondrial deoxyribonucleoside triphosphate (dNTP) and ribonucleoside triphosphate (rNTP) pools and of changes in pools in response to treatment with...
The objectives of this study were to: 1) determine how organic matter (incorporated vs. surface mulch) and nitrogen fertilization rate impact northern highbush blueberry (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal infection in mature plants, and 2) determine the magnitude of carbon fluxes (carbon...
Using phenolic scavengers different methods were examined to determine the optimum conditions for extracting polyphenol oxidase (PPO) from d'Anjou pears. Efficiency of the extraction was evaluated based on browning of the extract, PPO activity per g of pear tissue, absorption scan of 410 nm to -240 nm, and the isozyme...
Hardrock mining is associated with severe environmental and economic costs. Of particular concern is acid mine drainage which has contaminated several thousand kilometers of streams across the United States representing a formidable danger to watershed health. Given the high risks of this activity, ensuring high regulatory standards may be an...
The VISualization of Terrestrial and Aquatic Systems (VISTAS) software development project began with the proposition that visualization would increase the ability of scientists to explore and communicate their data, especially complex datasets that span multiple spatial and temporal scales. A case study of VISTAS articulates how and why scientists intend...
The Oregon wine industry is growing and becoming increasingly valuable to the regional economy. As with many production industries, the wine industry has faced concerns around its environmental practices and community impact. The use of synthetic pesticides, herbicides, fertilizers, and associated wastewater run-off are a few issues vineyard managers experience....
This dissertation examines learning driven adaptations in salmon recovery efforts and water resources management in Oregon. The case study utilizes a framework highlighting the connections between human and natural systems. Semi-structured interviews are used to analyze interactions between rural riparian landowners and watershed council staffs living and working in Oregon’s...
The U.S. Forest Service has been forced to adapt to numerous changes over the last three decades. These include a dramatic reduction in workforce, a declining budget, and controversial lawsuits. Moreover, recent agency wide studies suggest that within the Forest Service a new resource management paradigm has emerged that differs...
Two topics concerning fisheries management are considered in this thesis. The first concerns the social values that commercial fishing communities associate with commercial fishing. A survey of residents from eleven Oregon Coastal fishing communities was conducted to examine the social values associated with the commercial fishing occupation and fishing heritage....