4-Pyridoxic acid is the major metabolite of all forms of
vitamin B₆ in mammalian species. The determination of 4-pyridoxic
acid, therefore, is important in the investigation of vitamin B₆
metabolism and for the establishment of human requirements for the
vitamin.
Although 4-pyridoxic acid is itself fluorescent, Huff and
Perlzweig (1944)...
Evidence supporting the contribution of American high school
curricula to student transition from school to work was inconclusive.
Social science research indicated that high school programs had little
effect upon student achievement after leaving school. This study
developed a model to identify factors that influence the transition
from school to...
The role of glaciers as temporal water reservoirs is particularly pronounced in the (outer) tropics because of the very distinct wet/dry seasons. Rapid glacier retreat caused by climatic changes is thus a major concern, and decision makers demand urgently for regional/local glacier evolution trends, ice mass estimates and runoff assessments....
Cold-season storms are responsible for generating most of the snow that accumulates in mountainous watersheds across the western United States, but with overwhelming evidence of warming temperature trends, this seasonal snowpack is at risk for melt, The vast majority of snow trend studies utilize undifferentiated air temperature records – these...
Barley (Hordeum vulgare L.) is one of the oldest known domesticated crops. Originally cultivated for human consumption, other end-uses have gained importance over the millennia. Barley is the fourth most important cereal crop in the world (FAO-STAT, 2011), and today it is mainly used as animal feed or malted for...
Women, Gender, and Sexuality Studies (WGSS) is an interdisciplinary academic field that addresses gender, sexuality, and social justice issues. The research objective of this project was to examine the attitudes of self-identified male students in introductory Women, Gender, and Sexuality Studies for winter term 2016 at Oregon State University. This...
Dietetic professionals integrate knowledge and
expertise in food, nutrition, management and people and
apply their skills in a variety of settings. As the changing
scene in health care has necessitated enhanced management of
resources, the clinical nutrition manager (CNM) has emerged
as a dietetic professional in hospitals applying sound
management...
The F13L protein is the major envelope antigen of vaccinia virus, the prototypic member of the Orthopoxvirus genus. F13L is 372 residues in length and is essential for the formation of wrapped forms of virus. F13L contains a number of potential functional domains including a palmitylation site, a phospholipase domain...
Weight-loss supplements typically fall into 1 of 4 categories depending on their hypothesized mechanism of action: products that block the absorption of fat or carbohydrate, stimulants that increase thermogenesis, products that change metabolism and improve body composition, and products that suppress appetite or give a sense of fullness. Each category...
Ocean Acidification (OA) has emerged as a major threat to marine ecosystems, particularly regarding calcifying organisms. A growing body of literature describing laboratory investigations into pH stress indicates broadly deleterious effects for calcifiers, but responses vary greatly across taxa and can be influenced by variations in other environmental characteristics. Scaling...
Conventional training methods in most medical fields seek to avoid errors, framing them as negative consequences instead of as learning opportunities. Error-management training (EMT) contrasts with conventional methods by explicitly encouraging trainees to make errors through low-stakes training modules in an effort to alter perspectives on errors, utilizing them as...
This index provides access to infonnation about women in 102 books and journals. The information contained in each entry is only as good as the original and the quality varies considerably. Much of this infonnation has not before been easily accesible in this form. My hope is that this index...
Chemoreception is one of the dominant sensory modalities for many species of salamanders (reviewed in Chapter 2). At least seven of the ten currently recognized salamander families are known to respond to some sort of chemical cue. These responses are as varied as delaying hatching, seeking refuge, or initiating aggressive...
The advent of supercritical CO2 as a new heat-exchange medium has seen strong interest from the power industry and the energy research field recently. It is advan- tageous in comparison with other heat-exchange cycles, as it can be operated safely at much higher temperatures and pressures, thus increasing the thermal...
Fuel qualification timelines for new fuel technology under ideal conditions can take between 20-25 years to be fully qualified from initial concept to deployment as full fuel assemblies. To reduce the timeline and costs, new separate-effects test and integral-effects test experiments, advanced instrumentation, and advanced modeling and simulation tools are...
The most important purposes of this study were to: (1) determine
the extent of cooperation and coordination that currently exists in
selected community colleges which have community school programs
in their college districts, and (2) clarify the multi-roles of community
schools and of community education in community colleges. Other
purposes...
In an effort to isolate and characterize cardiac glycosides C-17
binding site(s), we have synthesized different affinity and photoaffinity
C-17 side chain probes. These probes were screened for their
ability to inhibit Na⁺,K⁺-ATPase enzyme, a pharmacological receptor
of cardiac glycosides. The enzyme was isolated from hog kidney.
Screening of these...
In the productive central-Oregon coastal upwelling environment, wind-driven upwelling, tides, and topographic effects vary across the shelf, setting the stage for varied biogeochemical responses to physical drivers. Current, temperature, salinity, and dissolved oxygen (DO) measurements from three moorings deployed during the upwelling seasons of 2009–2011 off the central-Oregon coast are...
Wind-driven coastal upwelling brings subsurface water onto the central-Oregon shelf after the spring transition each year. This cold and salty source water is oxygen-poor, yet above the hypoxic threshold, dissolved oxygen < 1.4 ml l⁻¹. Once on the shelf, dissolved oxygen (DO) concentrations of upwelled near-bottom waters are modified by...
More that just magnificent views of atoms and
molecules, Scanning Tunneling Microscopy, STM, images have
the potential to answer some fundamental questions relating
to surface molecular dynamics and bonding characteristics of
localized species versus more common analytical tools that
provide average of bulk sample information. A special
feature of the...
The purpose of this research was to determine whether hybridization between Amelanchier denticulata. (H.B.K.) Koch and Amelanchier nervosa (Decaisne) StandL occurs in Oaxaca, Mexico, and to evaluate components of yield and germination characteristics and seed dormancy of Amelanchier denticulata. Amelanchier nervosa and Amelanchier denticulata samples and morphological characters were used...
Analogous to ocean surface waves, waves in the ocean interior also experience steepening, breaking, and dissipation as they approach the coastline. Much less is known about this internal beach. In this work, extensive moored Acoustic Doppler Current Profiler and temperature/salinity data together with optical remote sensing are combined to describe...
This study presents a mooring analysis of the Ocean Sentinel buoy, which is a mobile test platform for Wave Energy Converters. The Ocean Sentinel is owned and operated by the Northwest National Marine Renewable Energy Center (NNMREC) at Oregon State University (OSU). The study involved a field observation as well...
The role of volumetric energy density on the microstructural evolution, texture and mechanical properties of 304L stainless steel parts additively manufactured via selective laser melting process is investigated. 304L is chosen because it is a potential candidate to be used as a matrix in a metal matrix composite with nanoparticles...
Numerous investigations demonstrate that mantle convective processes such as upwelling affect the surface topography of the overriding plate. The surface expression of mantle flow has been coined ‘transient topography’. Transient topography in the North American plate is thought to result from a mantle thermal anomaly beneath the Yellowstone volcanic center,...
Serum-free mouse embryo (SFME) cells are derived
in medium in which serum is replaced with growth
factors and other supplements. They display unusual
properties. They do not lose proliferative potential
or show gross chromosomal aberration upon extended
culture, they depend on epidermal growth factor (EGF)
for survival, and are reversibly...
Dislodged macroalgae and seagrasses, also known as marine wrack, frequently wash into coastal ecosystems from the ocean and are potentially important ecological resources for biological communities. These!nutrient and organic matter subsidies may be especially important on sandy beaches, where little in situ primary productivity exists for higher trophic levels. To...
Introduced vector-borne diseases, particularly avian malaria (Plasmodium relictum) and avian pox
virus (Avipoxvirus spp.), continue to play significant roles in the decline and extinction of native forest birds in
the Hawaiian Islands. Hawaiian honeycreepers are particularly susceptible to avian malaria and have survived
into this century largely because of persistence...
"A study of smallmouth bass in the Umpqua River System was initiated in 1987 and continued in 1988. Results of that work were reported in a progress report. The study was continued in 1990 after a one-year lapse. This report summarizes results of the work conducted in 1990. Objectives of...
This study modified certain existing techniques used in the
determination of the radiation exposure to various anatomical structures
of the gastro-intestinal tract during fluoroscopic examinations.
Monitoring films were attached directly to the patient during the
routine upper gastro-intestinal examination, instead of placing the
films on the panel of the fluoroscope....
This investigation is focused on smallmouth bass in the Umpqua River system. This investigation contains methods of fish sampling used and, later, describes which methods were more effective for specific tasks. It includes population size, density/structure, mortality rates, and age/growth data regarding the smallmouth bass. See also: Umpqua River smallmouth...
This dissertation explores the engineering of carbon nanotube electronic devices using atomic force microscopy (AFM) based techniques. A possible application for such devices is an electronic interface with individual biological molecules. This single molecule biosensing application is explored both experimentally and with computational modeling.
Scanning probe microscopy techniques, such as...
Contemporary circuit design involves significant computer-based simulation, calling for a balance between circuit model accuracy and simulation run time. Traditionally, circuit modelers concentrated on producing either (1) physically-based models, where each element in the model correlates to a physically meaningful aspect of the device being modeled or (2) mathematically-based "macromodels,"...
This study had two major purposes. The first focused upon understanding the development of aspects of ethnic development among 4- and 7-year-old Chinese-American boys and girls from immigrant and non-immigrant families. The second focused upon understanding the contribution of selected parental (fathers' and mothers') characteristics on aspects of children's ethnic...
The multifaceted role of the environment in regulating the structure and dynamics of biological communities has long fascinated ecologists and motivated much debate and research. Now, in a time of accelerated global changes due to human impacts, the need to understand how the environment shapes communities has gained new urgency....
Skeletal muscle proteins are the largest amino acid pool in animal body and are continuously degraded and resynthesized. Dozens of factors have been shown to influence the balance between synthesis and degradation and thereby regulate muscle growth and function. It is now know that one of the major regulatory bases...
The field of nanotechnology has been rapidly developing new materials. These materials have become incorporated into consumer products and the environment after only minimal assessment of their effects on human health or the environment. The toxicity of these new nanomaterials remains unknown due to the unpredictable nature of the core...
Cubic phase Li₇La₃Zr₂O₁₂ (LLZO) is a promising solid electrolyte for all solid-state lithium-ion battery, due to its reasonable ionic conductivity, stable against metallic Li, wide chemical window, and thermal and chemical stability. The main aim of this thesis is to investigate the influences of different synthesis methods on the structure...
Students who believe that their intelligence is able to grow over time (malleable/ growth mindset) perform better on measures of academic success than students who believe that intelligence is a fixed trait that cannot be changed (fixed mindset; Dweck, 2000). Previous research on the effectiveness of mindset interventions have demonstrated...
The purpose of this study was to ascertain the factors which
influenced undergraduate students in the School of Education at Oregon
State University to select vocational teacher education as their
major. Data were collected from 315 vocational, practical arts, and
non-vocational undergraduate teacher education majors who were
enrolled in teacher...
Analysis, coupled with an experimental investigation, is an important step in the design process of
electronic circuits. Fortunately, with the development
of computer programs to perform general network analysis,
the job of analyzing relatively complex networks is not
as formidable as it once was. This investigation develops guidelines for efficiently...
The interactions of a model synthetic liquid fuel reactant (furan) with a model
hydrodeoxygenation catalyst (clean and sulfided single crystal molybdenum)
were investigated using the following UHV tools: Auger electron spectroscopy
(AES), low energy electron diffraction (LEED), and temperature programed
reaction spectroscopy (TPRS). In addition to furan, the reactions of...
On June 27, 2000, the National Marine Fisheries Service (NMFS) received a biological assessment (BA) and request from the Federal Highway Administration (FHWA) for Endangered Species Act (ESA) section 7 formal consultation for a bridge replacement project over Butte Creek along Oregon Highway 211 (Woodburn to Estacada Highway) in Marion...
A set of circuit analysis programs designed for the IBM 1620
computer (having 40,000 digits of memory) is described and its operation
is explained. The set consists of d-c, a-c, and transient analysis
programs.
The d-c and a-c analysis programs provide the branch current
and node-to-reference potential for linear circuits....
Microplastics, plastic marine debris less than 5 mm in size, is a threat to the health of our oceans. One important way to reduce microplastics in our oceans is to educate people about the issue, particularly future decision-makers. In this study, a middle school curriculum was developed using current scientific...
Active transmission lines, a generalization of classical transmission
lines, are useful electrical devices. They can be utilized to
realize distributed amplifiers and to obtain other electrical characteristics unattainable with passive lines. Active lines have historical
significance and model many physical processes including heat
conduction in an internally heated material, a...
Landscape plants are highly diverse and nursery producers often grow thousands of taxa to satisfy the varied needs and aesthetic tastes of consumers. Related to this diversity, ornamental plant breeders must be nimble and diverse in their approach. Two seemingly disparate studies were conducted to investigate improving ornamental shrubs –...
Despite the dissemination of comprehensive reviews and teacher-friendly resources describing evidence-based practices to improve student outcomes, the adoption of these practices is slow and inconsistent across instructors at colleges and universities. To help reduce this research-practice gap, I argue for the application of implementation science to teaching and learning research...
Semidiurnal velocity and density oscillations are examined over the mid- and inner continental shelf near Heceta Bank on the Oregon coast. Measurements from two long-term observation networks with sites on and off the submarine bank reveal that both baroclinic velocities and displacements are dominated by the first mode, with larger...
Complex engineered systems can carry risk of high failure consequences, and as a result, resilience-the ability to avoid or quickly recover from faults-is desirable. Ideally, resilience should be designed-in as early in the design process as possible so that designers can best leverage the ability to explore the design space....
Ecologists must increasingly balance the need for accurate predictions about how ecosystems will be affected by climate change, against the fact that making such predictions at the ecosystem-level may be infeasible. Although information about responses of individual species to a changing environment is increasing, scaling such information to the community...
Cotoneaster is an ornamental shrub valued for showy flowers, berries and architecture as well as the ability tolerate adverse conditions under which other taxa fail. Cotoneaster is a highly diverse genus of over 400 species, of which few are available in the US nursery trade. Some species commercially available have...
Transition metal oxides exhibit potential in various application fields due to the special d-electrons. Solid state chemistry focuses on discovering the structure-property relationships. The work in this thesis mainly discusses compounds with hexagonal or brownmillerite-type structure and their practical properties.
Hexagonal YIn[subscript 1-x]Fe[subscript x]O₃ (x = 0-0.3, 0.7-1.0) phases have...
Research exploring methods to improve student learning of leadership, mathematics, and science in the United States is critically important. In this study, I sought to delve into the potential for student learning of leadership, mathematics, and science within the context of school-based agricultural education. Recognizing the teacher as a gatekeeper...
Human actions are pushing natural systems into states that have no historical precedent. In response, empirical and theoretical researchers are increasingly focused on developing ways to predict the responses of ecological systems to change. However, significant knowledge gaps remain, often leading to “ecological surprises” where observed impacts of global change...
The purpose of this investigation was to determine the
sprint start time to the first 10 and to the second 10
meters as a result of alteration of starting block angles
and lateral block spacings.
One male world class, two female college level, one
male and one female high school...
The foundation of the research compilation presented here began
with the derivation of an improved method for obtaining optimal in vitro
mitogenic responses in salmonid lymphocyte cultures by utilizing
autologous or homologous plasma as the primary serum supplement. It was
observed that lymphocytes which were previously unresponsive to
mitogenic challenge...
Teachers may be attracted to the use of a game in a learning activity under the presumption that students will find the game experience to be more “fun” than typical classroom activities. The use of a game in a learning activity should help students attain important learning outcomes and engage...
The purpose of this research was to examine some of
the factors which may affect body composition of
postmenopausal women. The effect of estrogen, physical
activity, diet and lifestyle were examined in 9 women
receiving estrogen replacement therapy and 11 women not
using this drug. For 3 consecutive days, the...
Melanocytes are dendritic, pigment-producing cells located in the skin and are responsible for its protection against the deleterious effects of solar ultraviolet radiation (UVR), which include DNA damage and elevated reactive oxygen species (ROS). They do so by synthesizing photoprotective melanin pigments and distributing them to adjacent skin cells (e.g.,...
Vessel traffic places the sensitive environmental, natural, and cultural resources of Washington’s outer coast at risk of oil or hazardous materials spills. In 1995, International Maritime Organization established the Area to be Avoided off the Washington Coast (ATBA) to reduce this risk. Annual estimates of vessel compliance with the ATBA...
Magnetically coupled passive transformers are increasingly integrated on-chip for
various analog and radio frequency (RF) applications including direct current
(DC) isolation, impedance transformation/matching, and conversion between
single-ended and differential signals. A primary motivation for the on-chip
integration of transformers is the overall size reduction and reduced cost.
However, the performance...
A long-term energy storage technology is necessary to utilize Oregon’s curtailed renewable energy, an issue the state faces, even with a low percentage of renewable energy in the energy mix. This report proposes a system design that details how hydrogen power-to-gas technology can be used in conjunction with the existing...
The two major purposes of this study were: (1) to test the
assumption that the IT Scale for Children (standard-ITSC) can be used
as a measure of both appropriate sex role discrimination and sex role
preference with preschool aged children, and (2) to extend previous
studies in these areas by...
The objectives of this research is to advance human health by evaluating interventions to minimize the detrimental effects of acute whole body gamma irradiation on bone metabolism, bone architecture and bone reconstruction using a mouse model. Total body irradiation (TBI) followed by adoptive transfer of bone marrow from donor animals...
Oceanic uptake of rising anthropogenic CO₂ emissions has caused the emergence of ocean acidification as a major threat to marine ecosystems worldwide. Along eastern boundary current systems, seawater is naturally acidified due to coastal upwelling of low pH seawater from depth. Compounded by ocean acidification, upwelling regions are expected to...
The influence of the physical environment on organisms has long been a subject of ecological research. But, the complex drivers of environmental variation, and the multiple scales at which this can occur, make studying this topic a difficult challenge. In rocky intertidal habitats, oceanographic- and climate-scale variability influence benthic communities...
The 134-year old Frantz-Dunn House in Hoskins, Oregon is an intact, well-preserved example of rural Gothic architecture in the Willamette Valley. The old farmstead sits on a former Civil War Fort site and represents a link in the history of the region to the larger patterns of expansion in America...
In recent years, Native Hawaiians and Pacific Islanders (NHPI) have become one of the fastest-growing racial groups within the United States, increasing by 40% between 2000 and 2010, and expected to nearly double in population size by 2030 (U.S. Census Bureau, 2012; Empowering Pacific Islander Communities & Asian Americans Advancing...
A central challenge for ecology is to understand the dynamic nature of species interactions. A classic approach to community ecology assumes that individuals within a species are functionally identical and that consumer-resource dynamics can be predicted solely by using species abundances. However, one species can consist of multiple functional groups,...
Mouse embryo cells cultured in vitro in serum-supplemented media undergo growth
crisis, resulting in the loss of genomically normal cells prior to the appearance of
established, aneuploid cell lines. I used the technique of serum-free cell culture to develop
a serum-free mouse embryo (SFME) cell line in which serum was...
Watermelon (Citrullus lanatus) is rich in lycopene and citrulline and has high phenolic content and antioxidant capacity. Previous studies demonstrate the health benefits of watermelon intake on improved blood pressure regulation along with others. Similarly, cherries, raspberries, walnuts and green tea are rich in anthocyanins, polyphenols, and polyunsaturated fatty acids...
Seed shattering is a constraint to improvement of seed yield in Lolium perenne L. and as a result, seed retention is an essential trait for this valuable crop. Field studies were conducted near Corvallis, OR in two years (2017-2018 and 2018-2019) to identify genetic variation for seed retention and to...
In a two part thesis, studies were made of two
different types of structure-activity relationships.
The first part consists of the synthesis and biological
evaluation of a number of 4-substituted pyrazoles and
isoxazoles as inhibitors of liver alcohol dehydrogenase.
In an effort to better define the steric and electronic
effects...
Task prioritization performance was evaluated for pilots who participated in a concurrent task management (CTM) training course and pilots who did not. CTM is the process by which pilots selectively attend to high priority tasks and shed non-priority tasks. Twenty seven pilots enrolled in a university flight technology program were...
Natural products have long been an important source of resources for humans. Many of these compounds possess unique chemical structures and potent biological properties. By targeting natural products with specific chemical properties, we can gain a better understanding of the roles these compounds play in the environment and their interactions...
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Supplementary Figure 2.5. Extracted ion chromatograms of fischerellin A (m/z 409.2-409.3
Inquiry into the cause of men's premature mortality has been historically framed in a biological deterministic perspective. This research takes an alternative view whereby the possible interactions of psychosocial variables with men's health promoting and health seeking behaviors are examined using cross-sectional survey data with older men. Specifically, this research...
The purpose of this research was to evaluate the
effectiveness of two smoking cessation programs -- one
group and one self-help -- which were developed and are
currently employed by the American Cancer Society.
The research was conducted in a work setting, and
all subjects were employees of the State...
Having a series of excellent properties, the oxide dispersion-strengthened (ODS) steels provide promising solutions for the challenges of structural materials in nuclear energy, especially the development of future advanced nuclear fission and even fusion reactors. The current manufacturing route for ODS alloys includes mechanical alloying (MA) of master alloys or...
This study discusses common struggles of first-generation Polynesian football players’ university experiences with cultural adaptation. There is little research on this topic. Because of the importance of these issues and the exploratory nature of this study, a qualitative approach was needed. Interviews were conducted with 15 first-generation Polynesian football male...
Biological invasions have been identified as one of the prominent drivers of global environmental change. In particular, invasive predators typically have substantial negative effects on populations of native prey, even driving species to extinction in extreme cases. However, beyond direct predatory effects, little is understood regarding the specific mechanisms by...
Senecio jacobaea (tansy ragwort) is a common weed in the
Pacific Northwest that contains toxic pyrrolizidine alkaloids
(PAs). Jacobine, the major PA in Senecio jacobaea, was incubated
with rat liver microsomes and metabolites were isolated by high
performance liquid chromatography (HPLC) and identified by mass
spectrometric analysis. Metabolites included a...
The interactions of chemical species with a solid surface play a role in many everyday applications such as heterogeneous catalysis, corrosion, and degradation reactions. Understanding the reaction kinetics and thermodynamics via rate constants and equilibrium constants, which require knowledge of the adsorbed species’ entropy, is essential for tuning these surface...
There is strong interest in the energy community to develop technologies that can diffuse low-cost, renewably generated electricity into difficult and slow to decarbonize sectors. One of the emerging areas of interest is renewable natural gas (RNG). RNG has low or no associated net greenhouse gas emissions and can be...