Index Catalog // ScholarsArchive@OSU

Aspects of the autecology of the plethodontid salamander, Aneides ferreus (Cope)

Creator:: McKenzie, Donald Samuel
Abstract:: Laboratory experiments and simulated field conditions were utilized to gain a better understanding of the ecology of the clouded salamander. Animals collected in western Oregon were utilized for studies in habitat selection, where it was shown that there was a significant pattern of selection of litter types (rock, bark, and...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF DONALD SAMUEL McKENZIE for the

Studies on the interaction of polylysine with deoxyribonucleic acid

Creator:: McKenzie, Raymond Leslie
Abstract:: The interaction of polylysine with DNA may be divided into two separate phenomena: the primary interaction involved in formation of a well-defined complex, and secondary interactions leading to aggregation of these complexes. Most studies on the interaction of polylysine with DNA have used techniques which measure properties of the aggregated...
Resource Type:: Dissertation
Full Text:: deoxyribonucleic acid AN ABSTRACT OF THE THESIS OF RAYMOND LESLIE McKENZIE for the DOCTOR OF PHILOSOPHY (Name of

Metabolic adaptations of the marine gastropod Thais emarginata

Creator:: Sweat, Sister Jean
Abstract:: Thais emarginata is a gastropod which inhabits the midlittoral zone of the intertidal region. Oxygen consumption of high-level and low-level organisms was determined at various seasons of the year over an experimental temperature range of 5 to 20° C. No significant difference in respiratory rate between separate populations of high-level...
Resource Type:: Dissertation
Full Text:: interest and suggestions, Dr. Peter Dawson, Dr. Paul Farber, Dr. Donald McKenzie, Dr. Austin Pritchard

Hemispheric processing of kinesthetically oriented spatial perception

Creator:: Nishizawa, Sho
Abstract:: Right cerebral hemispheric lateralization for spatial perception has been reported by using visual and tactile spatial tasks in brain-damaged patients, split-brain patients, and normal subjects. The main purpose of the present study was to investigate whether or not kinesthetic spatial perception was dominantly processed with the right cerebral hemisphere as...
Resource Type:: Dissertation
Full Text:: ORIENTED SPATIAI"PERCEPTION Redacted for Privacy Abstract approved: Donald E. Campbell Right cerebral

A proteomic approach to 1,2-dichloroethane bioactivation and reaction with redox-active protein disulfide isomerase

Creator:: Kaetzel, Rhonda Sue
Abstract:: Protein disulfide isomerase (PDI), a member of the thioredoxin superfamily, contains two domains with significant sequence homology to the active sites in thioredoxin. PDI facilitates the folding of nascent proteins in the endoplasmic reticulum (ER), binds hormones and Ca²⁺, catalyzes the glutathione dependent reduction of dehydroascorbate, serves as a major...
Resource Type:: Dissertation
Full Text:: . Abstract approved: Donald J. Reed Protein disulfide isomerase (PDI), a member of the thioredoxin

Effects of enhanced mid-ultraviolet radiation (290-315 NM) on development and survival of Boreal toad (Bufo boreas boreas) tadpoles

Creator:: Worrest, Robert C., 1935-
Abstract:: More than 3700 fertilized toad eggs were used in a series of studies designed to determine the effects of UV-B radiation (290- 315 nm) on temporal developmental patterns, systematic development and viability prior to metamorphic climax. The eggs were exposed to radiation from either "white-light" fluorescent lamps (Vita-Lite, Duro-Test Corporation,...
Resource Type:: Dissertation
Full Text:: : Donald J. KlmOdorf / More than 3700 fertilized toad eggs were used in a series of studies designed to

Glutathione conjugation as a determinant in 1,2-dihaloethane and alpha-naphthylisothiocyanate toxicity

Creator:: Jean, Paul A.
Resource Type:: Dissertation

A comparative study of temperate Chamaecyparis forests

Creator:: Hawk, Glenn M.
Abstract:: The objectives of this study include: (1) analysis of Chamaecyparis lawsoniana, C. taiwanensis, and C. formosensis forests including the structure, composition, and dynamics of plant communities and their environmental relationships; and (2) comparison of the temperate Chamaecyparis forests of Taiwan and the Pacific Northwest with emphasis on structural and successional...
Resource Type:: Dissertation
Full Text:: TEMPERATE CHAMAECYPARIS FORES2 Abstract approved: Redacted for Privacy Donald(B. del The objectives of

Toxicity and in vitro metabolism of Senecio jacobaea pyrrolizidine alkaloids in the rat and mouse

Creator:: Ramsdell, Howard Scott
Abstract:: 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...
Resource Type:: Dissertation
Full Text:: Mouse Abstract approved: D ai \- Donald R. Buhle “ r oe > Senecio

Environmental contaminants in male river otters collected from Oregon and Washington, 1994-99, with reproductive organ hypoplasia observed in otter males

Creator:: Grove, Robert Allan
Abstract:: A large number of river otter (Lontra canadensis) males were collected from areas of high and low contaminant concentrations throughout western Oregon and Washington during the fall and winter of 1994-99. Few significant non-reproductive organ morphometric differences were found in the large series of male otters collected, except for adrenal...
Resource Type:: Dissertation
Full Text:: Hypoplasia Observed in Otter Males. Abstract approved Donald R. Buhier A large number of river otter

Environmental contaminants in male river otters collected from Oregon and Washington, 1994-99, with reproductive organ hypoplasia observed in otter males

Creator:: Grove, Robert Allan
Abstract:: A large number of river otter (Lontra canadensis) males were collected from areas of high and low contaminant concentrations throughout western Oregon and Washington during the fall and winter of 1994-99. Few significant non-reproductive organ morphometric differences were found in the large series of male otters collected, except for adrenal...
Resource Type:: Dissertation
Full Text:: : Donald R. Buhler A large number of river otter (Lontra canadensis) males were collected from areas of

Heritabilities and associations between some agronomic characters in a two-row x six-row barley cross

Creator:: Bray, Donald William
Resource Type:: Dissertation
Full Text:: CHARACTERS IN A TWO -ROW x SIX -ROW BARLEY CROSS by DONALD WILLIAM BRAY A THESIS submitted to

The decay of ⁶¹Cu and ⁵⁹Cu--energy levels of ⁶¹Ni and ⁵⁹Ni

Creator:: Walker, Donald Arthur
Abstract:: The decay of ⁶¹Cu and ⁵⁹Cu produced by (d, n) reactions on natural nickel has been investigated. Gamma-ray energies and relative intensities were measured with a high resolution Ge(Li) spectrometer. The gamma-gamma coincidence spectrum of ⁶¹Cu was studied with a Ge(Li)-NaI(T1) system. From these data decay schemes of ⁶¹Cu and...
Resource Type:: Dissertation
Full Text:: 59Ni AN ABSTRACT OF THE THESIS OF DONALD ARTHUR WALKER for the (Name) in PHYSICS presented on

An investigation of alternative means of achieving water quality objectives

Creator:: Kerri, Kenneth Donald
Abstract:: Storage of water for water quality control is one of the alternative means of achieving water quality objectives. Authorities in the field of water quality management disagree regarding the use of precious water for the dilution of wastes. The costs of achieving water quality objectives by treatment of wastes at...
Resource Type:: Dissertation
Full Text:: quality objectives AN ABSTRACT OF THE THESIS OF KENNETH DONALD KERRI for the Ph. D. in Civil

Advances in Passive Sampling : Measuring Chemical Transport and Human Exposures

Creator:: Donald, Carey E.
Abstract:: Passive sampling devices have been used for decades to measure complex mixtures of bioavailable organic chemicals in a variety of environmental media. More recently passive sampler applications have expanded beyond monitoring chemical concentrations, and this dissertation continues to advance methods of passive sampling on many fronts. Despite their growing use,...
Resource Type:: Dissertation
Full Text:: E. Donald for the degree of Doctor of Philosophy in Toxicology presented on April 17, 2017 Title

The paleoecology of Silurian trilobites with a section on the Silurian stratigraphy of southeastern Wisconsin

Creator:: Mikulic, Donald G.
Resource Type:: Dissertation
Full Text:: the Silurian stratigraphy of southeastern Wisconsin AN ABSTRACT OF THE THESIS OF Donald George

Taxonomy and evolution of the Orthotyline genus Lopidea (Heteroptera: miridae)

Creator:: Asquith, Adam
Abstract:: The genus Lopidea Uhler is revised for America north of Mexico. The relationship of Lopidea to other orthotyline genera is discussed and it is proposed that the genus Ilnacora Reuter is the sister group of Lopidea. Forty-eight species of Lopidea are recognized in North America, one of which is described...
Resource Type:: Dissertation
Full Text:: . I also wish to thank Dr. Donald Zobel and Dr. Arnold Appleby for serving on my committee and for

Characterization of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induced modification of hepatic pyruvate carboxylase gene expression in C57BL/6J male mice

Creator:: Sparrow, Barney R.
Abstract:: The effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure on hepatic pyruvate carboxylase (PC) gene expression were investigated in C57BL/6J Ah[superscipt b/b male mice. A dose-dependent reduction of PC levels and activity occurred in animals given a single intraperitoneal dose of TCDD in a corn oil carrier. The dose ranged from 1 to...
Resource Type:: Dissertation
Full Text:: appreciation for the members of my committee: Dr. Dan Selivonchick, Dr. Donald Buhler, Dr. Donald Reed, and

Purification and properties of a ferredoxin from Rhizobium japonicum bacteroids

Creator:: Carter, Kevin Richard
Resource Type:: Dissertation
Full Text:: during this investigation. I also thank Drs. Donald J. Reed, Kensal E. VanHolde, Donald J. Armstrong and

Design, analysis and evaluation of bridge superstructures for live loads

Creator:: Turan, O. Tugrul
Abstract:: Due to age, original design that is deficient by modern standards, inadequate maintenance, environmental conditions, and increasing loads, large numbers of bridges in United States and elsewhere are classified as deficient and in need of rehabilitation or replacement. According to a national bridge inventory established by the Federal Highway Administration,...
Resource Type:: Dissertation
Full Text:: Kennedy, Dr. Michael Scott, and Dr. Donald C. Solmon for their helpful comments and feedback. I

Physiological and nutritional interrelationships of mineral elements to growth and reproduction in turkeys

Creator:: Egwuatu, Charles Obiajulu
Abstract:: Experiments involving poults were conducted with the primary objective of studying the effects of sodium chloride on field rickets. A second objective was to study the effects of mineral elements on reproduction of turkey breeder males and females. Three experiments were conducted with poults. A comparison of added dietary sodium...
Resource Type:: Dissertation
Full Text:: are due to the members of my graduate committee; to Dr. Donald Helfer of the School of Veterinary

The consumption and design process of handcrafters : theoretical implications

Creator:: Stannard, Casey Rhea
Abstract:: The overarching purpose of this research was to determine characteristics of raw materials which impacted the consumption and design process of crafters. The characteristics were related to the three levels of design as described by Donald Norman and the concept of linking value in consumer tribes. The specific focus of...
Resource Type:: Dissertation
Full Text:: characteristics were related to the three levels of design as described by Donald Norman and the concept of

A conceptual model of women entrepreneurs in small businesses

Creator:: Putnam, Carol A.
Abstract:: Women entrepreneurs are an economic force within the American and Oregon economy. Women are starting businesses at two to five times the rate of men. There has been significant research detailing the demographics, barriers, and business management skills of women business owners. Yet, the research to date has been limited...
Resource Type:: Dissertation
Full Text:: McKenzie 88 General Description 88 Family Background/Early Adulthood 88 Relationships 91 Personal Values 93

The Effects of the Flow Regime on Stream Channel Form and Processes

Creator:: Hempel, Laura A.
Abstract:: Numerous studies have explored how alluvial channel size and morphology are adjusted to different sediment and flow conditions, yet we still know very little about how and to what degree the flow regime controls channel form and processes. We use the term ‘channel form’ to refer to the size and...
Resource Type:: Dissertation
Full Text:: % loss of campsite capacity (e.g., Beus et al., 1993; Hazel, 1993; Howard and Donald, 1981; Kearsley et

Isostatic evolution and crustal structures of the Amazon continental margin determined by admittance analyses and inversion of gravity data

Creator:: Braga, Luiz F. S.
Resource Type:: Dissertation
Full Text:: DETERMINING THE STRENGTH OF THE LITHOSPHERE McKenzie [1967] has shown evidences that both gravity anomalies

Dry coniferous forests in the Western Oregon Cascades

Creator:: Means, Joseph E.
Abstract:: Pseudotsuga menziesii dominates the forests of the Pacific Northwest. But though it is dominat, Tsuaa heteroohylla or Abies amabilis is usually climax. Many researchers have studied Pseudotsuga on the widespread mesic sites where it is seral, but few have examined the relatively rare ecosystems in which Pseudotsuga or its associate...
Resource Type:: Dissertation
Full Text:: of the Detroit, McKenzie, Blue River, Oakridge and Rigdon ranger districts on the Willamette

Magnetotelluric Studies of Tectonic Systems and Volcanic Areas of North America

Creator:: Bowles-Martinez, Esteban
Abstract:: Magnetotellurics is used in two geologic settings on scales ranging from 1000-km tectonic structures to local features hundreds of meters wide. These areas are the Midcontinent Rift System (MRS) and its related mantle plume in the northern Midwestern United States and Newberry Volcano in central Oregon. The MRS study uses...
Resource Type:: Dissertation

Heart rate, survivorship, oxygen consumption, and metabolic end product accumulations in the intertidal limpets Collisella pelta and Collisella digitalis in relation to desiccation and hypoxia

Creator:: Boese, Bruce Leon
Abstract:: The heart rate, oxygen consumption, survivorship, and 1-lactate accumulation were determined in the intertidal limpets Collisella pelta and Collisella digitalis in relation to laboratory desiccation at 15°C or 30°C. Water loss was computed as a percentage of total initial body water (wet weight - dry weight). Although water was lost...
Resource Type:: Dissertation
Full Text:: . Biochem. Physiol. 54(3B): 313-324. Doran, Sharon Rose and Donald S. McKenzie. 1972. Aerial and aquatic

An investigation into the possible arousal of psychological reactance as a consequence of interest inventory feedback

Creator:: Beller, Stephen Mark
Abstract:: The purpose of this research was to determine whether feedback from vocational interest inventories leads to the arousal of psychological reactance. The data for the study was collected from 80 male and female subjects who were first year students at Oregon State University enrolled in Psychology 111, Personal Development. The...
Resource Type:: Dissertation
Full Text:: avoid misusing them in vocational guidance. Lister and McKenzie (1968) believe that inven- tory

Digenetic trematodes of Ascaphus truei in western Oregon

Creator:: Anderson, Glenn Arthur
Abstract:: The Tailed Frog Ascaphus truei, the only species in the family Ascaphidae found outside New Zealand, is a common inhabitant of the mountain streams of the Northwestern United States and British Columbia. The anatomical peculiarities of this primitive anuran have been investigated, but no literature is available on the digenetic...
Resource Type:: Dissertation
Full Text:: collected in a small stream entering the south fork of the McKenzie River in the Cascade Mountains in

‘Tis a Gift to be Simple : On Passive Sampling and Compatible Techniques for Reducing the Complexity of Environmental Mixtures

Creator:: Bergmann, Alan J.
Abstract:: Assessing the risk from exposure to a chemical mixture in the environment can seem prohibitively challenging. Most components of the mixture are not readily identifiable, chemicals may interact to cause other-than-additive toxicity, and the number of potential combinations of environmental contaminants is enormous. These challenges can make it seem impossible...
Resource Type:: Dissertation
Full Text:: my best friend, Carey Donald, for your patience, perspective, and candor; for your enthusiasm for

The identification of variables discriminating between groups differing in level of self-actualization through the use of multiple discriminant analysis

Creator:: Wills, Byron Steiner
Abstract:: The study was conducted to identify variables, from among the theory related and demographic/biographic variables included in the study, which were able to discriminate between groups of male and groups of female freshmen who differed in their level of self-actualization. Five hundred and forty freshmen (277 males and 263 females)...
Resource Type:: Dissertation
Full Text:: . Special gratitude is ex- tended to Dr. Donald E. Campbell for the use of his program, for his help with

Pharmacokinetic analysis of antimicrobials and an anthelmintic agent in alpacas and llamas with theoretical applications

Creator:: Wattananat, Triporn
Abstract:: The pharmacokinetics of two antimicrobials were investigated in alpacas. Six healthy alpacas were each administered a single dose of 10 mg/kg of oxytetracycline by IV injection and IM injection. In addition, a single dose of 20 mg/kg of florfenicol by IV administration was given to alpacas in a separate study....
Resource Type:: Dissertation

Copper and streptomycin resistance in Pseudomonas syringae isolated from Pacific Northwest nurseries

Creator:: Scheck, Heather J.
Resource Type:: Dissertation

Selected demographic variables as predictors of small group attendance or nonattendance among adult Conservative Baptists : a discriminant analysis

Creator:: McBride, Neal
Abstract:: Small groups are an important and widely used educational format in adult church education. It is estimated that ninety percent of the churches that belong to the Conservative Baptist Association of Oregon provide some type of small group eductional opportunity for their adult members. The purpose of this study was...
Resource Type:: Dissertation

Human Exposure to PAHs in Air, Water, and Crayfish

Creator:: Paulik, L. Blair
Abstract:: There are many links between exposure to environmental pollution and risks to human health. While advances in the fields of toxicology, exposure science, and environmental chemistry have shown light on many of these links, many more research challenges remain. One major challenge is how to accurately characterize the toxicity of...
Resource Type:: Dissertation
Full Text:: the manuscript. In Chapter 3, Carey Donald helped select sampling sites, design the sampling plan

The deposition and storage of hepatic lipids in the frog Ascaphus truei (Stejneger) : an electron microscopic histochemical and chromatographic study

Creator:: Belton, John Clair
Abstract:: Electron microscopic, histochemical and thin-layer chromatographic techniques have been used to study some cytological changes associated with seasonal lipid deposition in the liver of Ascaphus. Histochemical and chromatographic information has shown that unsaturated triglycerides occur in great quantities in the liver of pre-ovulatory females and may serve as a solvent...
Resource Type:: Dissertation
Full Text:: populations, Marys Peak in western Benton County and the South -fork of the McKenzie River in eastern Lane

Hormonal stimulation of breeding activity in different genetic groups of ewe lambs

Creator:: West, Dennis Errol, 1942-
Abstract:: An investigation of the effects of exogenous gonadotropic treatments on fertility of various genetic groups of ewe lambs were run over a six-year period. Since hormonal treatments varied and the experimental animals were different from one breeding season to the next, each year comprised a separate study. Hormone treatment included...
Resource Type:: Dissertation
Full Text:: month old ewe lambs (Casida,1934). McKenzie and Bogart (1935) produced estrus in 70% of the ewes

N fertilizer effects on soil solution Mn and Mn response of barley and oats

Creator:: Petrie, S. E.
Abstract:: A series of field experiments was established in 1978, 1979, and 1980 on Lower Klamath Lake where Mn deficiency of oats had been observed in previous years. The pH of the soils ranged from 7.6 to 8.3 and the organic matter content was between 17 and 19%. The objectives of...
Resource Type:: Dissertation

Some aspects of the ecology of the bryophytes in the Three Sisters primitive area

Creator:: Pechanec, Anna Alice
Resource Type:: Dissertation

The interaction of polylysine with DNA as studied by polarization of flurescence

Creator:: Evett, Jay Fredrick
Abstract:: A fluorescent dye, 1-dimethylaminonaphthalene-5-sulfonyl chloride (dansyl chloride), was covalently bonded to polylysine. The dansyl tagged polylysine was complexed to DNA by gradient dialysis. The polarization and intensity of fluorescence of the dansyl and the turbidity of the complex were measured as a function of salt concentration for a variety of...
Resource Type:: Dissertation
Full Text:: . McKenzie for carrying out the syntheses. The poly- lysine was analyzed by Spencer L. Baird, Jr. for its

Survival and persistence of Bacteroidales human and ruminant specific fecal markers and occurrence with fecal pathogens

Creator:: Walters, Sarah P.
Abstract:: Aquatic fecal contamination from non-point sources impairs environmental health and serves as a vehicle for transmission of waterborne disease, resulting in economic losses worldwide. Accurate methods of diagnosing fecal pollution and its source are needed to prevent human exposure, remediate pollution, and reduce economic impacts. In order to obtain this...
Resource Type:: Dissertation

Women in Forest Sector Leadership: A Qualitative, Multi-country Study

Creator:: Larasatie, Pipiet
Abstract:: Generally presented as a preferred social norm based on both ethical considerations and legislative demands, gender equality has been highly encouraged in recent years. For instance, The United Nations Sustainable Development Goals for 2030 call out achieving gender equality and empowerment of women. However, although there are multiple efforts to...
Resource Type:: Dissertation

An assessment of differences in perceived training needs among entrepreneurs

Creator:: Herbert, Bruce Edmund
Resource Type:: Dissertation

A Contingency-Based Evaluation for Beaver Restoration of Salmon Habitat in Oregon Coastal Streams

Creator:: Stevenson, John R.
Abstract:: Streams across the western United States are impaired from human alterations that have reduced freshwater habitat by simplifying channel complexity and disconnecting floodplains (Knox et al., 2022; Waples et al., 2008; Wohl, 2014). Climate change is likely to continue exacerbating these risks by warming summer surface stream temperatures (Crozier et...
Resource Type:: Dissertation

Theory and Implementation of a Variational Database Management System

Creator:: Ataei, Parisa S.
Abstract:: In this thesis, I present the variational database management system, a formal framework and its implementation for representing variation in relational databases and managing variational information needs. A variational database is intended to support any kind of variation in a database. Specific kinds of variation in databases have already been...
Resource Type:: Dissertation

Urinary 17-ketosteroids, rate of gain, feed efficiency, and certain blood constituents of beef cattle

Creator:: Nelms, George Estes, 1927-2011
Resource Type:: Dissertation
Full Text:: advice made this stu~y possible, and to Fred F. McKenzie, Head of the Department of Animal Husbandry

An assessment of plant community structure, herbivory, soils, and state-and-transition theory on a winterfat (Krascheninnikovia lanata [Pursh] A.D.J. Meeuse & Smit) ecological site

Creator:: Matney, Casey A.
Abstract:: State-and-transition models (STMs) have been successfully used to describe ecological dynamics in woodlands, shrublands, grasslands, and several other ecosystems. Changes in vegetation and soil are measured to gauge and predict plant community dynamics within ecological states and transitions between alternative ecological states. Ecological states and their boundaries are defined by...
Resource Type:: Dissertation

Movement Ecology and Population Dynamics of the Endangered Hawaiian Duck (Anas wyvilliana)

Creator:: Malachowski, Christopher P.
Abstract:: Fundamental objectives in the field of conservation biology involve understanding the processes that influence small and declining populations and applying that knowledge to develop appropriate monitoring strategies and targeted management and conservation actions. Critical first steps in determining the relative role of factors that drive population declines involves estimation of...
Resource Type:: Dissertation
Full Text:: , Stephen Turnbull, Caitlin Wells, Mee-ya Monnin, Marie McKenzie, Marysa Milinichik, Kathy Valier, Sharon

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

Creator:: Suzuki, Yasuko
Abstract:: Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) nest in large colonies on East Sand Island in the Columbia River estuary, the largest known colonies for the two species in the world. Both species of piscivorous colonial waterbirds have been identified as predators with a significant impact on the...
Resource Type:: Dissertation
Full Text:: . Donald E. Lyons provided generous assistance with study design, field work, data analysis, and

The identification of common skills, knowledges and related factors needed for successful employment in Oregon

Creator:: Fancher, Ada Jean
Abstract:: The purpose of the study was to identify a list of skills, knowledges and related factors that are common to fourteen occupational cluster areas representative of the work community of Oregon. PROCEDURES A list of skills, knowledges and related factors needed for successful employment was derived from existing task analyses...
Resource Type:: Dissertation

Assessing Exposures and Simplifying Complex Mixtures of SVOCs for Hazard Characterization using Alternative Model Systems

Creator:: Rivera, Brianna N.
Abstract:: Throughout their lifetime individuals are exposed to complex mixtures of chemicals. The study of chemical mixtures is an internationally recognized research priority, but seemingly complex challenge. To reduce the intricacy of studying mixtures, researchers have identified different prioritization methods based on exposure or the toxicity of chemicals. However, understanding the...
Resource Type:: Dissertation

Development of chemostats and use of redox indicators for studying redox transformations in biogeochemical matrices

Creator:: Lemmon, Teresa L.
Resource Type:: Dissertation

Modeling abiotic influences on disease dynamics for the complex life cycle of the myxozoan parasite Ceratomyxa shasta

Creator:: Ray, Robert Adam
Abstract:: Most parasites and their hosts live in a balance within their environment; however a disease outbreak can occur when either the parasite, host, or environment, are perturbed. Myxozoan parasites are associated with a wide variety of cultured and wild fish populations. Most myxozoans are relatively benign to their vertebrate host;...
Resource Type:: Dissertation

Consumer attitudes toward potentially restrictive energy conservation regulations

Creator:: Merfeld, Michele Kay
Abstract:: A sample of 893 Oregon individuals from a Western Regional Agricultural Experiment Station Project (W-159 "Consequences of Energy Conservation Policies for Western Region Households") was used to analyze consumer attitudes toward potentially restrictive energy conservation regulations. Belief in the seriousness of the energy problem, a psychological measure of internal control...
Resource Type:: Dissertation
Full Text:: appreciation and thanks to Dr. Donald A. Anderson, and Mary Ann Anderson and Dr. Judy Powell. Dr. Anderson's

Estimation and Sparse Selection of Conditional Probability Models for Vector Time Series

Creator:: Ruiz, Trevor D.
Abstract:: Diverse scientific fields collect multiple time series data to investigate the dynamical behavior of complex systems: atmospheric and climate science, geophysics, neuroscience, epidemiology, ecology, and environmental science. Identifying patterns of mutual dependence among such data generates valuable knowledge that can be applied either for inferential or forecasting purposes. Vector autoregressive...
Resource Type:: Dissertation
Full Text:: examples can be found (McKenzie, 1988; Ord et al., 1993) and the subject is beginning to receive renewed

The distribution of biota in Oregon

Creator:: Bratz, Robert Davis
Resource Type:: Dissertation

The effects of environmental stressors on cardiac gene expression and contractility in rainbow trout (Oncorhynchus mykiss)

Creator:: Momoda, Tracey S.
Abstract:: Rainbow trout (Oncorhynchus mykiss) experience a variety of stressors in their natural environment as well as in aquaculture that can have negative effects on their physiology. The effects of physiological stress and endocrine disruption have been well described in fish. However, there is a scarcity of information on the effects...
Resource Type:: Dissertation

Implications of selenium status for various metabolic and performance parameters in beef cattle

Creator:: Drake, Daniel J.
Abstract:: Metabolic and performance parameters of beef calves were compared between Se supplemented (Se) and control (C) dam treatment groups from known Se deficient cattle. Four trials were conducted at three locations involving 50, 36, 25 and 39 experimental dam/calf pairs. Se supplementation was either two 30 gram oral boluses (90%...
Resource Type:: Dissertation
Full Text:: blood selenium and GPX levels when consuming low selenium diets (McKenzie et al, 1978) but on adequate

Effect of controlled vitamin B-6 intake and pyridoxine supplementation on B-6 status of smokers

Creator:: Sindihebura-Ruhumba, Pascaline
Abstract:: Previous studies have found that smoking may have a negative effect on vitamin B-6 indices and have demonstrated a possible association between smoking and depressed plasma pyridoxal-5'-phosphate (PLP) concentration. Individuals with plasma PLP values below the adequate level of 30 nmoles/L might benefit from consumption of vitamin B-6 supplements, but...
Resource Type:: Dissertation
Full Text:: Nganji, Abraham Ntwari, Donald Ngarukiyinka and Myriam Douceline Migisha for their support, patience

A study of antimutagenicity in yogurt

Creator:: Sudarshan, Nadathur R.
Abstract:: The purpose of this study was to identify antimutagens in yogurt active against the experimental colon carcinogen, N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). Our initial experiments showed that acetone extracts of yogurt, or milk fermented by various lactic acid bacteria were antimutagenic against MNNG and 3,2'-dimethyl-4-aminobiphenyl (DMAB) in the Ames test (Salmonella typhimurium TA...
Resource Type:: Dissertation

An examination of climate and land-use change as drivers of population dynamics in breeding birds

Creator:: Kim, Hankyu
Abstract:: Anthropogenic land-cover change and climate change are the major drivers of the steep loss of avian biodiversity in past decades. Loss of avian biodiversity is predicted to result in the reduction of ecosystem services and ecological functions. Identifying avian population changes and the drivers of these trajectories is essential for...
Resource Type:: Dissertation

Individual and population responses to abiotic stresses in Italian ryegrass (Lolium multiflorum Lam.)

Creator:: Martinez-Ghersa, Maria Alejandra
Abstract:: Plant form is a compromise between resource gathering, reproduction and the tolerance to physical demands of the abiotic and biotic environment. In an agricultural field in addition to the natural factors causing stress, humans also introduce physical and mechanical stresses, and chemical pesticides into the environment. Many of these factors...
Resource Type:: Dissertation

Diffuse deformation patterns along the North American plate boundary zone, offshore western United States

Creator:: Chaytor, Jason D.
Abstract:: Plate boundaries are commonly regions of complex, diffuse deformation with the motion across the boundary accommodated by numerous structural systems, rather than being narrow, discrete zones of deformation. One such boundary occurs where the North American plate makes contact with Juan de Fuca, Gorda, and Pacific plates along the west...
Resource Type:: Dissertation

Models relating camping to river terrace characteristics along the Rogue Scenic Waterway

Creator:: Pfister, Robert E.
Abstract:: The degree to which camping is related to selected characteristics of river terraces along the Rogue Waterway, Oregon has been analyzed. Previous attempts to formulate models relating campsite choice to characteristics of the natural environment focused on camping parties engaged in auto-camping and the aggregate population behavior rather than on...
Resource Type:: Dissertation

Sex hormone influence on rate and efficiency gains, endocrines and carcass characteristics of rabbits

Creator:: Rasheed, Ahmed Adel
Resource Type:: Dissertation
Full Text:: the experimental animals. Sincere gratitude is accorded Dr, Fred F. McKenzie, Head of the

California condors in the Pacific Northwest : integrating history, molecular ecology, and spatial modeling for reintroduction planning

Creator:: D'Elia, Jesse
Abstract:: Reintroduction programs are increasingly being used to save animals from extinction and aid in their recovery. The California Condor (Gymnogyps californianus), one of the most endangered birds in the world, is a remarkable example of how reintroduction programs can help rapidly increase a species' population numbers and range following a...
Resource Type:: Dissertation

With Hardship Comes Ease: Exploring Muslim Identity Development at a Private Predominantly White Institution in the Mid-South through Counterstorytelling

Creator:: Saeed, Faran
Abstract:: The dominant narrative of U.S. Muslims in higher education is associated with violent rhetoric, anti-American values, and terrorism. After terrorist attacks took place on September 11th, 2001, this narrative expanded to include a depiction of U.S. Muslims as being oppressed and submissive. Hate crimes, discrimination, and Islamophobic attacks towards Muslims...
Resource Type:: Dissertation

Perceived food autonomy : measurement and relationships with food satisfaction among assisted living residents

Creator:: Jambi, Hanan A.
Abstract:: The purpose of this exploratory study was to develop an instrument to measure perceived food autonomy (PFA) among cognitively alert residents in state licensed Assisted Living (AL) facilities, and to investigate the influence of PFA on food satisfaction, while controlling for functional (physical, social, and psychological) status, general health, and...
Resource Type:: Dissertation
Full Text:: , Bright-See, and Campbell, 1999; Pyette, Gray-Donald, Cyr, and Boutier, 1995). Social functional

An environmental history of Euphoria Ridge, Oregon : a case study for ethnobotany in traditional resource management

Creator:: Fluharty, Suzanne M.
Abstract:: This dissertation looks at one landscape component of the Coquille Indian Tribe's ancestral lands in order to understand the place meaning created and assigned to Euphoria Ridge, Oregon. I focus on three cultural overlays across time that together with the unique biophysical components, generate an importance for the locale to...
Resource Type:: Dissertation

An analysis of montane forest vegetation on the east flank of the central Oregon Cascades

Creator:: West, Neil E.
Abstract:: Montane forest vegetation as it occurs on the east flank of the central Oregon Cascades has provided excellent conditions for a "natural experiment" in the use of various methodologies in studying vegetational distribution. This "experiment" has reflected on some theory and practice for the discipline of plant synecology. Detailed descriptions,...
Resource Type:: Dissertation
Full Text:: McKenzie summer ranges had greatly diminished, as grazing allotments were severely reduced due to the

A taxonomic revision of the Nearctic species of Apateticus Dallas and Podisus Herrich-Schaeffer (Heteroptera:Pentatomidae:Asopinae)

Creator:: Phillips, Kathryn Ann
Resource Type:: Dissertation
Full Text:: University, Lubbock, (TTU), Dr. O. F. Francke; Donald B. Thomas, Jr. Collection, Lincoln, NE, (DBT), Dr. D

Ruminal Biodegradation of Heterocyclic Toxic Compounds

Creator:: Tanaree, Dan D.
Abstract:: Cyclic nitramines are a class of compounds that include most of the commonly used explosives today. These are among the most common toxicants released into the environment as a result of human activity, generated on military ranges, battlefields, and production sites. Of these, hexahydro-1,3,5-trinitro-1,3,5- triazine (RDX) is of particular interest,...
Resource Type:: Dissertation
Full Text:: Glasgow, Mr. Bruce Harmon, Ms. Elizabeth Graham- Williams, Miss McKenzie Hughes, Miss Stephanie Wood, Mrs

A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

Creator:: Lint, Harold LeRoy
Abstract:: A study was made of the subgenus Genuini of the genus Juncus in the Pacific States, California, Oregon and Washington. Extensive morphological comparisons, geographical distributions, habitat differences and observations of apparent presence or absence of natural hybrids provided the major data sources. Cytological studies were made, but were inconclusive. Eleven...
Resource Type:: Dissertation

Agricultural erosion and sediment in the western Willamette Valley as indicated by redistribution of Cesium-137

Creator:: Brown, R. B. (Randall Barber)
Abstract:: Modern agricultural erosion was studied using ¹³⁷Cs from fallout as an indicator of erosion/deposition. The study area was a 285 ha agricultural watershed in the hilly western margin of the Willamette Valley, a high winter rainfall zone in which fall-planted crops are commonly grown. Objectives of the study were (i)...
Resource Type:: Dissertation

Mechanistic Properties of Plant-Soil Systems in Stormwater Treatment

Creator:: Hilliard, Richard
Abstract:: A dissertation describing the results of a series of greenhouse experiments conducted to better understand phytoremediation in stormwater bioretention systems.
Resource Type:: Dissertation

Post-harvest establishment influences ANPP, soil C and DOC export in complex mountainous terrain

Creator:: Peterson, Fox S.
Abstract:: The link between aboveground net primary productivity (ANPP) and resource gradients generated by complex terrain (solar radiation, nutrients, and moisture) has been established in the literature. Belowground ecosystem stocks and functions, such as soil organic carbon (SOC), dissolved organic carbon (DOC), and belowground productivity have also been related to the...
Resource Type:: Dissertation

Role of Transcriptional Factor COUP-TF-interacting Proteins in Skin Permeability Barrier Development, and in Skin Carcinogenesis, and Role of Lipids in Atopic Dermatitis

Creator:: Li, Shan
Abstract:: Mammalian skin is the largest organ of the body and serves as a barrier to protect the body against chemical, mechanical and pathogenic insults as well as water loss. The epidermis is formed from the primitive ectoderm into a multilayered stratified epithelium, consisting of basal, spinous, granular and outermost cornified...
Resource Type:: Dissertation
Full Text:: provided the human samples and has given the critical suggestions for the project. Dr. Donald Leung and

Invisibility: Environmental Migration Governance in a Changing Climate

Creator:: Abel, Kali M.
Abstract:: Climate change has the potential to accelerate many forms of human migration and mobility, yet almost all of the key migration outcomes of interest are determined predominantly by governance, or the norms, laws, and institutions involved in the coordination of human society. These outcomes include the decision whether or not...
Resource Type:: Dissertation

Genome-enabled discovery and characterization of type III effector-encoding genes of plant symbiotic bacteria

Creator:: Kimbrel, Jeffrey A.
Abstract:: Symbiosis is the close and protracted interaction between organisms. The molecular interactions that occur during symbiosis are complex with multiple barriers that must be overcome. Many Gram-negative, host-associated bacteria use a type III secretion system to mediate associations with their eukaryotic hosts. This secretion system is a specialized apparatus for...
Resource Type:: Dissertation

Equilibrium and exchange rate studies in sulfur monochloride, thionyl chloride and related systems

Creator:: Dalton, Samuel Clemmer
Resource Type:: Dissertation

A study of the Megaloptera of the Pacific coastal region of the United States

Creator:: Evans, Elwin D.
Resource Type:: Dissertation
Full Text:: and LaJune Chandler and family for their extended kindness during my travels; Donald Maddux, Stanley

Comprehensive Analysis of The Brain Metabolome Using Mass Spectrometry in Conjunction with Data Analysis Techniques

Creator:: Khorani, Mona
Abstract:: Metabolomics has recently gained momentum in biomolecule research and complements the genomics and proteomics research space. Metabolomics strives to detect, identify, and quantify all metabolites present in biological samples. In particular, biomolecular analysis using ultra-performance liquid chromatography combined with mass spectrometry (UPLC-MS) has become increasingly important for metabolomic analyses. Similarly,...
Resource Type:: Dissertation

A critical analysis of wildlife conservation in Oregon

Creator:: Rymon, Larry Maring
Abstract:: This analysis is the study of Oregon's wildlife resources from the period prior to white settlement up to the present time, including critical projections, based on present trends and expected conditions for both human and wildlife populations in the state up to the year 2010. Prior to white settlement Oregon...
Resource Type:: Dissertation

Land use distributions and changes in the Willamette Valley in relation to soil characteristics

Creator:: Wiens, John Herbert
Abstract:: A study was undertaken in the Willamette Valley, Oregon, to document 1971 land use patterns as well as land use change in a smaller study area in the 16 years prior, and to relate these to soil characteristics. Quantification of these inter-relationships was aided by use of computer tabulation and...
Resource Type:: Dissertation

Devonian tabulate corals of the Great Basin

Creator:: Flory, Richard Aerts
Resource Type:: Dissertation

Traditional ecological knowledge to develop and maintain fire regimes in northwestern California, Klamath-Siskiyou bioregion : management and restoration of culturally significant habitats

Creator:: Lake, Frank K.
Abstract:: The use of Native American fire regimes evolved in the Klamath-Siskiyou bioregion over millennia. A mixture of Native American and Euro-American socio-cultural management has developed from adaptations to climate, topography, ecological processes, and land use practices. This research incorporates Traditional Ecological Knowledge (TEK) to partially examine the role of tribal...
Resource Type:: Dissertation

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