Indole-3-carbinol (I3C), the most abundant metabolite of glucobrassicins, is
found in cruciferous vegetables such as broccoli, Brussels sprouts, cabbage and
cauliflower. I3C has been shown to have anticarcinogenic activity against many
chemical carcinogens in multiple target organs in animal models. However, the
anticarcinogenic activity of I3C is considered indirect since...
Environmental monitoring poses two challenges to statistical analysis: complex data and complex survey designs. Monitoring for system health involves measuring physical, chemical, and biological properties that have complex relations. Exploring these relations is an integral part of understanding how systems are changing under stress. How does one explore high dimensional...
The Quotient Method (QM) is used by the United States Environmental Protection Agency (USEPA) in ecological risk assessments of pesticides for nontarget organisms. The QM requires several assumptions regarding exposure and hazards of pesticides to wildlife; several of these assumptions have not been tested. During 1997-99, I conducted three experiments...
The purpose of this study was to analyze the individual reasoning of
24 adults as they made decisions for two communities regarding municipal
wastewater treatment. The two western Oregon communities were both
responding to notices from governmental agencies of higher environmental
standards for the purification of wastewater before it could...
Purpose: The Purpose of this research was to design, implement and evaluate a patient centered asthma intervention pilot program directed by physicians and administered by community pharmacists to a group of Managed Care contracted Oregon Health Plan asthmatics. The evaluation was to determine if the proposed intervention could improve the...
With increasing operating frequencies in CMOS RF/microwave integrated circuits,
the performance of on-chip interconnects is becoming significantly affected by the lossy
substrate. It is the purpose of the first part of this thesis to develop a rigorous field
theoretic analysis approach for efficient characterization of single and multiple coupled
interconnects...
This research was initiated to investigate a high
mortality problem occurring in market age broiler
chickens in Oregon. Initial field investigations
revealed that mortality was due to the systemic bacterial
infections. The subsequent laboratory experiments
suggested that suppressed short-term, non-specific innate
immunity rather than pathogenic properties of bacteria
caused the...
Monitoring wildlife habitats has become important to forest ecosystem management because it provides valuable information about the response of forests and their species to harvest practices, impacts from recreational use, conservation efforts, and natural and human-caused disturbances. Monitoring is a complex task that requires a variety of abiotic and biotic...
Relay strip-cropping combines two vegetation management tactics, under-sowing
and strip-management. In this study conducted from 1994 though 1997, a
cover crop seed-mixture containing oats (Avena sativa L. var. "Monida"), common
vetch (Vicia sativa L.), red clover (Trifolium pratense L.), annual ryegrass (Lolium
multflorum Lam.), and buckwheat (Fagopyrum esculentum Moench) was...
The giant hairy desert scorpion, Hadrurus arizonensis, is a long-lived species
of North American scorpion that is presented here as an important model for research
in mating systems evolution and sexual selection. Many behaviors found in this
species were undocumented and are described here for the first time. This thesis...
We used recent phenomenological form factors to calculate the effect of on-shell
two-pion exchange in nucleon-nucleon scattering below the two-pion production
threshold. As expected, the contributions of partial wave amplitudes are all negligible.
We also noticed that the relativistic spin-operator decomposition of the
scattering amplitude is not unique at certain...
Biomass burning associated with deforestation and land use in the Amazon, greatly contributes to emissions as well as depletion of elemental pools. We identified deforestation and pasture formation and quantified resultant burning emissions and terrestrial aboveground elemental pool losses during a period of early colonization in the vicinity of Jamari,...
The purpose of this study was to determine the level of awareness and use of
selected universal design features and products in single-family housing by Oregon
housing contractors. Also researched were barriers and incentives to use as well as
the position and opinions of these housing contractors on the viability...
The Mount Fubilan Intrusion is part of a geologically young hypabyssal stock in the Star Mountains of Papua New Guinea. This stock was mapped as the Ok Tedi Intrusive Complex and divided into four separate bodies: the Mount Fubilan, Sydney Intrusion, Kalgoorlie, and Ningi Intrusions. Hydrothermal fluids caused alteration of...
The aim of the first manuscript was to examine CHD risk in women with MS by
assessing the frequency of physical inactivity and the frequency of anthropometric,
dietary, and metabolic CHD risk factors. Although participation in physical activity is
often avoided by many women with MS, some women remain physically...
Previous research has shown a gap between chemistry students' conceptual
and computational understandings of chemistry topics such as gas laws,
equilibrium, and reactions. This qualitative study examined the conceptual and
computational understandings of stoichiometry of college students enrolled in a
large lecture Introductory Chemistry course. Factors that might influence students'...
The marine cyanobacterium Lyngbya majuscula has proven to be extraordinarily rich in bioactive secondary metabolites. This dissertation describes the chemistry of L. majuscula collected from Grenada, Fiji and Papua New Guinea, and the biosyntheses of two L. majuscula metabolites, curacin A and barbamide.
The chemical studies with a Grenada collection...
Herein, a program of research is detailed related to transport through the Si metal oxide semiconductor (MOS) quantum dots fabricated in a process flow compatible with modern ULSI (ultra large scale integrated circuit). Silicon quantum dots were fabricated by placing split gates within a MOSFET structure. Quantum dots of several...
Effects of small-scale disturbances on fecundity and growth rates of Linnaea
borealis L., Tiarella trifoliata L. var. unifoliata, and Trillium ovatum Pursh. were studied in
old-growth forests in the Tsuga heterophylla Zone on the west slope of the Cascade
Mountain Range of Oregon. Performance of each species was compared in...
Typical porphyry-type Cu-Mo mineralization predates and underlies the well-known
Main Stage polymetallic veins of the Butte district, Montana. This thesis presents the
first systematic study of the isotopic characteristics of the pre-Main Stage K-silicate and
sericitic wallrock alteration related to the porphyry Cu-Mo stage.
Oxygen and hydrogen isotopic compositions were...
Five student-researchers and the author engaged in
a continually-evolving, student-driven qualitative
research study. Despite significant disadvantages,
including navigating a. foreign culture without speaking
the language, these invulnerable learners succeeded.
Ultimately of greatest interest to the six were an
analysis of their collective knowledge and experiences,
and their individual transformation over...
¹¹¹In/Cd perturbed angular correlation (PAC) gamma spectroscopy was used to
study the point defect thermodynamics of tetragonal zirconia (t-zirconia).
PAC can be used to measure, among other things, oxygen vacancy defect
concentrations in t-zirconia. Higher than expected concentrations of oxygen vacancies in
undoped samples were found using PAC. It was...
The Oregon Long-Term Soil Quality Project was initiated to identify soil
properties that respond rapidly to alternative management practices. Such practices
included winter cover cropping, which was implemented at two experimental research
stations and several grower fields throughout the Willamette Valley. The goal of this
thesis was to identify the...
Two types of temporary poois, known as playas, occur in semiarid southeast Oregon. Vegetated upland playas are found in the High Lava Plain province; barren alkaline-saline playas are found in the Basin and Range province. Both types become ponded in most years, but they often lack redoximorphic features indicative of...
Edge effects resulting from forest fragmentation are likely to alter the distributions and
interactions of resident species. I evaluated changes in species composition, species
turnover, and relative abundance of ground arthropods across replicated transects
extending from regenerating clearcuts into old-growth Douglas-fir forests. Arthropods
were collected from 3-August to 14-September in...
This dissertation describes the epiphyte communities on tall shrubs in forests of
western Oregon, with a focus on potential effects of management practices on these
communities. Shrubs and other hardwoods have recently gained recognition as
hotspots of diversity for epiphytes in young conifer forests of the region. Yet little is...
Low bone mineral density (BMD) and poor stability both contribute to
increased risk of fractures associated with a fall. The aim of this dissertation was
two-fold. The first study, a cross-sectional analysis, sought to determine the
anthropometric and/or performance variables that best predicted BMD and postural
stability in mature, premenopausal...
The study of differentiation of integrals has led to the study of maximal functions. In the development of harmonic analysis, the most powerful result connected with Lebesgue's theorem was that of the Hardy-Littlewood Maximal Theorem. This maximal theorem implies Lebesgue's theorem, and the maximal function and its variants have played...
Preservice teachers' beliefs and values develop due to their long "apprenticeship of observation" (Lortie, 1975) and often filter their teacher education experiences (Feiman-Nemser & Buchman, 1986; Pajares, 1992). Case methods may be one curricular tool by which to instill change in preservice teachers' beliefs and values. This study investigated the...
This research was conducted to evaluate the effectiveness of two different types of
alcohol education interventions on the attitudes about alcohol consumption in college,
knowledge about alcohol, and self-reported alcohol consumption behavior of college
students. The educational interventions were a student-centered CD-Rom interactive
program, and a teacher-centered motivational speaker. Each...
Contaminant transport in ground water is an important environmental process that
affects a host of natural systems. Transport of contaminants is affected by many
processes, including aqueous complexation, adsorption, and redox reactions. One of the
most important components of an aquifer that controls transport is iron-oxide. In this
study, the...
Evidence exists that links a sedentary lifestyle with the emergence of chronic
diseases during adulthood. Reports indicate that many children and adolescents already
have risk factors for chronic diseases and the prevalence of obesity among children is at
an all time high. There are concerns that children may not be...
This investigation explored how the magnitude, style, and frequency of
channel adjustments vary spatially and over time within a 5th-order mountain
watershed. Historical data sets, including repeated cross section surveys spanning up
to 20 years at five sites on 2nd to 5th-order channels and streamflow records spanning
up to 50...
Seedling root fluorescence (SRF) has been used as a test in the USA since 1941 to discriminate Italian ryegrass (Lolium multiflorum Lam.) from perennial ryegrass (L. perenne L.). Generally, roots of Italian ryegrass fluorescece when exposed to ultraviolet light, while roots of perennial ryegrass do not. Presence of fluorescent seedlings...
This thesis contains two essays that use state-of-the-art econometric methods to estimate the implicit prices of various housing and vehicle attributes in hedonic price analysis. The additive nonparametric regression proposed by Hastie and Tibshirani (1990) is applied to capture a series of nonlinearities relating prices to their attributes that cannot...
The Middle Fork John Day River is composed of low gradient, alluvial valley
segments separated by constrained, canyon-like reaches, and has a history of multiple
land-uses. These factors can alter the physical and biological structure of streams, and
disrupt the longitudinal river continuum. I examined habitat, fish, macroinvertebrates,
and primary...
Foodservice systems management (FSM) has had impact on the role of dietitians,
not only in the United States (US), but also in Korea. The purpose of the study
was: (1) to delineate and identify the acceptable FSM competencies for Korean
dietitians (KDs), (2) to identify factors which influenced the Korean...
The adoption and increasing uses of the Internet in higher education
in many parts of the world have resulted in fundamental changes in
academic cultures. The transfer of information is essential to academic
life, and the Internet offers faster and easier access to information and
communication between people than ever...
Changes in the federal farm program, in rainfall pattern and quantity, and
increased incidence of herbicide resistant weeds and diseases have generated
increased interest in spring grains in the Pacific Northwest. However, spring grains
have traditionally been treated as minor crops in this region, thus little research has
been done...
The effects of oligoribonucleotides of identical or similar sequences to a
ribosomal protein binding site, specifically S8, on prokaryotic 30S ribosomal assembly
were investigated in Escherichia coli. The oligoribonucleotides were expected to bind to
the target protein S8 and block its incorporation into the 30S subunit, resulting in a nonfunctional...
This study described how and why a Korean elementary teacher taught mathematics as he did. Specifically, the study sought to describe his beliefs about the teaching and learning of mathematics and relate them to patterns of classroom interaction and norms.
An ethnographic inquiry guided the study of one third grade...
