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...
Flax seed is a rich source of alpha-linolenic acid (ALA). Feeding broiler birds flax seed can increase n-3 fatty acids (FA) in meat tissues and can increase human intake of n-3 FA. However, non-starch polysaccharides (NSP) in flax seed decrease digestibility of lipids and proteins and have a negative impact...
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 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....
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....
The spread of invasive species into the Pacific Northwest (PNW) of the United States poses a serious threat to the valuable forest resources of the region. Many insects and diseases that are a threat to these forest resources can be transported inside firewood. When campers transport their firewood across borders...
Growing urbanization, shifting water uses, and a focus on ecosystem health in the Deschutes River Basin in Central Oregon led to experimentation with new voluntary market-based approaches to water management in the last decade. To meet groundwater demands while maintaining instream flows and upholding prior water allocations, the Oregon Water...
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Denise Lach
Growing urbanization, shifting water uses, and a focus on ecosystem health in
The role of science in marine policy, and environmental policy in general, is a debated topic. Currently, there is an increasing desire for transparent and participatory democracy that involves more input from local residents and other non-experts. These demands often conflict with the increasing complexity of problems and the real...
This study explores the role of classroom use of live organisms as a pathway for the spread of invasive species. The overall guiding research question is “Are behavioral changes necessary to reduce the spread from the classroom pathway?” Using focus groups comprised of key educators, this study seeks to identify...