Large numbers of coho salmon (Oncorhynehus kisutch) fry move downstream shortly after emergence from the gravel in many spawning tributaries. In three small coastal streams of Oregon about eight times more juveniles leave the tributaries as newly emerged fry than as smolts one year later. Because these early emigrants comprise...
Nanoparticles (NPs), defined as materials having at least one dimension (height, width, diameter) in the nanoscale, are increasingly being incorporated into a wide variety of products and are replacing traditional bulk materials in many applications. This is because they can be more efficacious, more sustainable, and can have unique characteristics...
Cognitive impairment can severely impact quality of life, and can place added strain on family and caregivers.¹⁻³ Moreover, cognitive decline has been shown to proceed to more serious conditions including Alzheimer’s disease and dementia,⁴⁻⁶ making it critical to intervene on risk factors. In addition to traditional risk factors for cognitive...
The tendency for certain single- and mixed-strain lactic
starter cultures to develop a fruity and/or fermented off-flavor
in ripening Cheddar cheese was traced to certain strains of
Streptococcus lactis in the starter. A very intense fruity and/or
fermented flavor developed in experimental cheeses when one particular
S. lactis strain was...
The role of beta-carotene degradations in the development of
off-flavors in milk and milk products has not been established. The
purpose of this investigation was to study the oxidation of beta-carotene
and to identify volatile compounds arising from autoxidizing
beta-carotene.
Pure cyrstalline beta-carotene, mixed with Celite to accelerate
oxidation, was...
Toxin production by cyanobacterial harmful algal blooms (cyanoHABs) in freshwater systems has lasting ecological and human impacts. Nutrients, light availability, hydrology, and microbial community composition impact the frequency and intensity of toxic cyanoHABs. Climate change will exacerbate toxic cyanoHABs, making real time and predictive monitoring a vital tool for managing...
In recent years, several interrelated forces—prolonged drought, growing populations, height-ened environmental protections, sustained agricultural use, and hydrologic alterations due to climate change—have increased pressure on water users in the Western United States, where the agricultural sector accounts for up to 90% of total water withdrawals. Technology im-provements developed since the...
“International river basin is defined as an area extending over two or more states determined by the watershed limits of the system of waters, including surface and underground waters, flowing into a common terminus” (Shapiro-Libai, 1969, p. 22). There are 276 international river basins providing almost 60% of global freshwater...
This thesis merges the fields of Ecology and Anthropology by applying Habitat Suitability Modeling to the relationship between people and plants in the Pacific Northwest. In it, I create and optimize two Maxent habitat suitability models for camas (Camassia spp.) in Oregon. The first model describes the physical environment of...
This paper is an exploratory study of the risk perceptions in the Oregon Hazelnut growing community. The study takes place at a time when the industry as a whole has begun to stabilize from the effects of Eastern Filbert Blight, a fungal pathogen that infects hazelnut trees which had devastated...
This dissertation draws on ethnographic data and political ecological theory to analyze the experience of residents living in the IBM-Endicott Superfund site in Endicott, New York. Combining in-depth narratives and quantitative measures from a household survey, it highlights residents' perceptions of 1) environmental health risk, 2) risk mitigation, 3) deindustrialization...
Oregon’s coastal communities grew from the booming logging and fishing industries of the 19th century, but in recent decades have faced not only major declines in both timber and fish resources but also an increasing reliance on tourists and retirees and the resultant glut of seasonal service-sector jobs. As a...
This thesis explore the effects of China's Grassland Contract policy on sedentary and mobile Inner Mongolian pastoralists' attitudes towards cooperation, current grassland management practices, and the future viability of livestock herding in New Barag Right Banner, Inner Mongolia. Semi-structured interviews, a scaled survey instrument, and participant observation were carried out...
In an effort to supplement the recently completed NOAA fishing community profiles, three coastal Oregon communities were chosen as sites for a collaborative project designed to produce long-form profiles. In order to provide a representation of the coast Newport, Port Orford, and Garibali, Oregon were included based on community size,...
This dissertation seeks to understand Yi farmers’ livelihoods in the midst of an agricultural transition in Yunnan, Southwest China. This dissertation examines a community’s traditional knowledge related to wild edible plants (WEPs), analyzes socio-ecological vulnerability and resilience in the face of agricultural transition from subsistence farming to cash cropping, and...
The increase in obesity rates in both children and adults in the United States may be a result of impaired or dysregulation of fat metabolism. Long chain acyl-CoA synthetases (ACSLs) may be key regulators of skeletal muscle cell fat metabolism, including fat oxidation and storage. The purpose of the study...
Popcorn was popped conventionally in oil and in a microwave
oven without oil. Volatile components were collected by condensation
of popper headspace gases and by vacuum steam distillation of
a slurry of ground, popped corn in distilled water. The organic
compounds were extracted from the aqueous condensate and vacuum
distillate...
Deterioration of the flavor of sterilized concentrated milk (SCM)
is recognized as the principal limiting factor to commercial acceptance
of this product. Although a number of volatile compounds have
been identified in SCM, quantitative information on these compounds
is lacking. It is therefore difficult to ascertain the significance of
these...