The microsporidian parasite Nadelspora canceri infects Dungeness crabs, Cancer magister, along the United States Pacific Northwest coast. The prevalence and seasonal variation of N. canceri in Dungeness crabs from Alsea Bay, Oregon, are described based on examination of 2991 crabs collected at monthly intervals from October, 1991 to June, 1993....
The infection intensity of the monogenetic trematode Gyrodactyus stellatus on laboratory held English sole (Parophrys vetulus) appeared to be influenced by handling stress, substrate, and starvation. In bioassays testing G. stellatus survival times in mucus and serum collected from laboratory held sole at different times during trematode infection, trematode survival...
The purpose of the present study was to investigate
consumer knowledge and attitudes toward consumer education
of college students in secondary teacher education
preparatory programs in Korea.
Specifically, this study was aimed to 1) measure the
degree of consumer knowledge of college students in
secondary teacher education preparatory programs, 2)...
The focus of this study is the American military
family. The primary purpose is to examine the family from
the paradigm of a distinct occupational subculture and,
substantiating that existence, to understand the
implications of work-family role conflict of the military
family. The objectives are to substantiate the military
as...
This study was unique in that it focused on the rural elderly of both Black and White ethnicity's, explored differences between groups by comparing use and knowledge of health services, and controlled for gender, income, educational attainment, health status, age, and health beliefs - the independent variables of the study....
The purpose of this study was to determine what levels of community satisfaction
and personal and household characteristics would result in a model of retirees and pre-retirees
and their propensity to move. This study assessed the relationship between certain
socio-demographic variables and feelings of overall satisfaction as well as satisfaction...
The study explored a model that integrates human
capital, family resource, employment and psychosocial
factors to explain variation in economic self-sufficiency
(ESS) among single mothers. A sample of 851 single mothers
on Aid to Families with Dependent Children was selected from
the Washington State Family Income Study data base. Data...
An integrated framework of Family Resource Management and Household
Economic theory was utilized to develop a model of relationships between
human capital, family characteristics and resources, number of income
sources, hours spent in home production, total income and subjective well-being.
This study utilized a sample of 129 women systematically selected...
Among the changes farm families have faced during the past two
decades has been the dramatic increase in off-farm employment. Historically,
women's involvement has been essential to the functioning of the family
farm, and as off-farm income has increased in importance, increasing
numbers of farm women have joined the ranks...
This study examined graduate international students'
knowledge, attitudes, experiences, practices, and
satisfaction relating to credit cards. Based on the
literature, international students attending U.S. colleges
and universities were considered an important population to
study because of: (1) internationalization of credit cards
and (2) the lack of credit card research on...
An investigation of the genetic and meristic patterns of coastal cutthroat trout (Oncorhynchus clarki clarki) in two coastal basins, one in Oregon and one in Alaska, revealed varying degrees of differences among populations within each site. Coastal cutthroat trout collected from seven sites above and below barriers from Elk River,...
Thirty households were randomly selected to examine intra-household gender differentials in work roles and distribution of resources, between adult men and women, and boys and girls. Work related activities were assessed by time used in agricultural work, household work, and income generating work. Distribution of resources was assessed by expenses...
Consumers' risk perceptions are examined to explain the underlying reasons for consumer
concern associated with milk from dairy herds treated with recombinant bovine growth
hormone (rbGH). A focus group study was employed as an initial step in exploring the
primary influences of consumer apprehension toward rbGH's use. The information
obtained...
The relationships between types of wealth components and consumption
expenditures were investigated as a means of better understanding retired
elderly household well-being. Specifically, the concept of mental account was
used to identify the characteristics of different types of wealth components, and
four mental accounts were identified: flow of investment, current...
The effects of selected family characteristics on
interrelated components of household asset portfolios over a
three-year time period were investigated. Specifically, this
study attempted to conceptually define mental accounts, to
identify own-adjustment and cross-adjustment characteristics
of these mental accounts, to explore influences of selected
family characteristics on these mental accounts,...
An investigation was conducted to determine the impact of economic and
non-economic factors on the off-farm work efforts of Oregon farm husbands and
wives. A total of 283 Oregon farm households (with husbands and wives) were
randomly selected from lists of persons deferring taxes for farm purposes, obtained
from County...
The term "interaction" in evolutionary biology and ecology
describes the relationships among variables in two classes of causal
models. In the first, "interaction" refers to the influence of a
single putatively causal variable on a variable of interest. In the
second class of models, the term applies when a third...
Intense infections of the gill pathogen Dermocystidium salmonis were associated with mortality of prespawning chinook salmon Oncorhynchus tshawytscha in several Oregon rivers in 1988. The occurrence of the pathogen in returning adult chinook salmon was monitored in several coastal Oregon stocks from 1989 to 1993. Although the prevalence of the...
This thesis is a collection of essays about Paxton, a
small town in western Nebraska, and an exploration of the
contradictions and complexities found there. It is also a
reflection on the layers of history and connections that
exist not only among families that have lived in these towns
for...
Associations between occupancy patterns of a montane anuran species, Rana cascadae, and habitat structure at multiple scales were examined to investigate how population structure may influence persistence in spatially and temporally heterogeneous environments. Predictions were based on population dynamics suggested by source-sink and metapopulation models. Potential sites in three basins...
We have previously shown that diets enriched with (n-3) fatty acids reduced the delayed-type hypersensitivity (DTH) skin reaction to keyhole limpet haemocyanin (KLH) in geriatric-Beagles. Although the amount of α-tocopheryl acetate in diets of the previous study exceeded requirements, plasma α-tocopherol concentration was significantly lower in dogs fed the high...
Length of survival of the monogenetic trematode Gyrodactylus stellatus in serum and mucus collected from English soles Pleuronectes vetulus at different stages of a laboratory epizootic suggests that both the mucus and serum may be involved in resistance to the parasite. In general, trematode survival was shorter in the serum...
After three-quarters of a century of introduction of 152 conifer and broadleaf species,
no promising candidate exotic was found for the Douglas-fir region. Growth curves
spanning 50 years or longer are figured for many species. Firs, pines, larches, spruces,
hemlocks, and cedars originating in northwestern North America had superior growth...
Published February 1996. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Intermittent, headwater streams recently have been recognized as important
components of forest ecosystems and have been provided increased protection by the
Northwest Forest Plan. However, few studies have examined their distribution,
dynamics, and ecological roles, such as habitat for wildlife. My goal was to provide
additional information on the ecology...
Infectious pancreatic necrosis (IPN) is an acute, contagious disease of trout fry
and fingerlings caused by viruses of the family birnaviridae. IPN disease usually results
in mortality that is inversely proportional to the age of the fish. While many studies
have been carried out to increase our understanding of IPN,...
This study is a review of the researcher's deliberate strategies for
incorporating Latino culture into the teaching of a Spanish language course.
The researcher developed, presented and assessed a curriculum unit
designed to examine the social and educational problems of Latinos, the history
of Latin America, the effects of discrimination...
This ethnography describes RV [recreational vehicle] seasonal migration as an adaptive, transhumant strategy. The study population is retired, transhumant migrants, who are members of a nation-wide, membership camping organization. Fieldwork was conducted over a period of seven months at two sites located on the West Coast. These sites reflect northern...
The vast majority of housing in the United States today has been
created to conform to a family definition that does not match current
demographic realities. The "traditional family" - a married couple with
an employed husband, a homemaker wife, and several children has been
the model family that housing...
The purpose of this research was to determine a causal model of factors affecting
age integrated/age segregated neighborhood preference during retirement. Data were anaLzed for 1299 preretirers in four states: Idaho, Michigan, Oregon, and Utah, collected in a mail survey in 1990 by the Western Regional Agricultural Experiment Station Committee...
The purpose of this study was to explore factors
which influence Taiwanese vocational teachers'
participation in program evaluations, use of evaluative
results and, in turn, program improvement. Twelve
Taiwanese public vocational high school teachers were
interviewed during February and March 1992. To confirm
the responses of the teachers, 12 school...
Three closely related isolates belonging to the A₁ serotype of infectious pancreatic
necrosis virus (IPNV) were selected for comparison, to provide insight into the nature of
variation in the virulence of IPN viruses. Brook trout fry (Salvelinus fontinalis) were
experimentally infected with the three isolates by immersion. Cumulative mortalities over...
The purpose is to investigate the number, causes,
services denied, and reasons for denial of services to
homeless families with children--single parent families
(female and male) and couples--in a tri-county region, Linn,
Benton and Lincoln counties, Oregon. The data for this study
were obtained from monthly survey forms (July 1992-...
I examined two amphibian communities to assess factors
that may impact amphibian biodiversity. The results suggest
that the potential factors which influence the maintenance
of amphibian biodiversity are multi-faceted and thus,
attempts to understand these factors must reflect these
complexities.
I investigated factors that influenced the susceptibility
of western toad...
Relations between the diversity of juvenile anadromous salmonids and pool features
were examined in a managed and a pristine watershed in Oregon during the summer of
1990. There were no differences (p>0.05) in pool depth, velocity or pool wood volumes
between streams. However, the pristine system had twice the number...
The increasing demand for meals eaten away from home has increased the interest in
developing a more complete understanding of the food-away-from-home (FAFH)
consumption patterns in the United States. Previous studies have examined factors that
explain variations in FAFH expenditures in the aggregate. However, no previous
examinations have dealt with...
The management of the home has been a central
component of Home Economics since the early 1900s. It is,
however, an enigmatic behavior that has not yielded easily
to research. Recognizing that meal provision and food
consumption by families incorporate management processes
and occur on a regular and frequent basis,...
Despite the fact that fishing is an inherently uncertain business, risk has rarely
been formally recognized in fisheries science or management. Few fishery
management plans include any form of risk assessment and those that do focus on
minimizing risk caused by uncertainty associated with markets and environmental
conditions. Fishermen's attitudes...
The purpose of this study was to describe the transitions, support, and current
activities of students who completed baccalaureate degrees after completing
community college non-transfer degrees. The population was limited to students who
earned an associate degree of Applied Science, Science, or General Studies from
Oregon community colleges, and who...
Financial management planning styles were investigated with original data
collected from 180 unmarried, elderly women with a home economics college
background and living alone. Deacon and Firebaugh's (1975, 1988)
household management systems theory, continuity theory from gerontology,
and the construct of anticipatory socialization from sociology framed the
study. Three planning...
The purpose of this study was to determine: what factors
are important in influencing adult students to participate in
distance learning programs; 2) whether students prefer interactive
television or instructional television.
A review of the literature identified items that were
considered Important to students participating in distance learning
programs. The...
This publication has been prepared in response to many questions from seafood retailers about parasites in marine fish products. Customers who find parasites in fish they purchase need to have good answers for some obvious questions.
Your customers need to understand two key points: First, parasites are a natural occurrence....
Disseminated neoplasia (DN) is a proliferative cell disorder that occurs in the
circulatory system of bivalves. The condition is progressive and lethal. At least 15
species of bivalves over a wide range of geographic locations have been reported to
contract DN. Prevalence levels of disseminated neoplasia can reach up to...
This monograph provides an introduction to financing timber and timberland. It is intended to be an overview of credit underwriting for such financing. Primary users would include borrowers and their accountants, attorneys and advisors.
Nuclear DNA flow cytometry was used to differentiate ploidy level and determine nuclear DNA content in Rubus. Nuclei suspensions were prepared from leaf discs of young leaves following published protocols with modifications that included: increasing the stain concentration, adding the stain after the RN ase treatment instead of adding it...
In 1992, amendments to the Fishing and Aquaculture Law required rural communities
to organize into syndicates or cooperatives and to create resource management plans.
Once the Chilean Fisheries Service (SERNAP) approves these plans, villages could manage designated subtidal and intertidal areas. In response to these amendments, two villages, Puerto Aldea...
An Engineering Decision Support System, EDSS, was developed using Bayesian mathematics which incorporates knowledge and confidence components observed in alternative-criterion pair decision making. The separation of knowledge and confidence has been previously unaccounted for in decision-making methods. EDSS provides decision support to individuals or teams which must make choices between...
Energy crises have triggered increases in solar energy
use at various times in the past 2500 years. A surge of
interest in solar energy was experienced in the United
States in the late 1970's. This interest has since
declined. Still, concerns about dependency on imported
fuels, the environmental effects of...
The attachment of myristic acid to the N-terminal glycine residue of many
eukaryotic and viral proteins is often essential for the acquisition of the protein's
biological activity. Vaccinia virus (VV), the prototype member of the Poxviridae,
expresses several myristylated proteins during the course of infection. Only one of
these proteins,...
As genome sequencing projects begin to come to completion, the challenge becomes one of determining how to understand the information contained within the DNA. DNA is a polymorphic macromolecule; the A- B- and Z-DNA conformations have been observed by a variety of physical techniques. The magnitude of the energetic differences...
The average size and age of chinook salmon (Oncorhynchus
tshawytscha) caught in commercial fisheries along the Pacific Coast
of North America have decreased substantially in this century. These
declines might be caused in part by changes in size and age at
maturity within the stocks contributing to those fisheries. Upriver...
This study examined the distribution and behavior of adult spring chinook salmon
(Oncorhynchus tshawytscha) related to patterns of stream temperature and physical
habitat at channel unit, reach, and basin-wide spatial scales in both a wilderness stream
and a disturbed stream in the John Day River basin in northeastern Oregon. Thermal...
Historically, women made quilts for utilitarian and for aesthetic purposes. Quilting was for many women one of the few outlets in which they could express themselves in a patriarchal society. Quiltmaking in groups afforded women the opportunity to increase their personal and political empowerment and to legitimate social gatherings. Because...
The United States Forest Service's Passport In Time program is designed to involve the public in archaeology on National Forest land. Three of the program's goals are: 1) allow archaeologists to conduct research they would not otherwise have the time or the budget to conduct; 2) teach the public about...
Green manures, soil solarization, and long rotations with crops not susceptible to Verticillium wilt are among the disease management tactics currently under investigation as alternatives to chemical fumigation of soil. The effect of a broccoli green manure on soil microsclerotial populations of three isolates of Verticillium dahliae and on Verticillium...
Adult dusky Canada geese (Branta canadensis
occidentalis Baird) were banded with plastic neck bands and
observed on the winter range during 1985-92. Annual
survival rates of adult geese estimated from observation
data ranged from 76% to 85%. A model of Canada goose
population dynamics was developed to illustrate
relationships between...
Authentic assessment of visitor learning in museum settings is a challenging
endeavor. Evaluation literature includes very few studies that link adult visitors' behavior
to their learning. Multiple data collection methods in a naturalistic environment hold
great promise for increasing understanding of informal public education.
In 1997, Oregon State University's Hatfield...
The resurgence of creationism the past few years has been led by advocates
of recent-creationism. These individuals, a minority among creationists in general,
argue that the entire universe was created approximately 10,000 years ago in one six-day
period of time. Recent-creationists support their position by appealing to the
Genesis account...
A negative relation between grain protein content and
grain yield is frequently observed in wheat (Triticum
aestivum L. em Thell) i.e. as grain yield increases, grain
protein decreases. It has been suggested that the inverse
relation between grain yield and protein is in part the
result of developing high yielding...
The seismic performance of port structures has been well documented following
recent earthquakes, and indicates that port structures are highly susceptible to earthquake-induced
damages. These damages are primarily due to soil liquefaction and the associated
ground failures. Sheet pile bulkheads provide vital intermodal and lifeline transportation
links between water-side and...
Numerous natural and anthropogenic chemicals interact with endocrine systems of
animals. The most widely studied of these endocrine active chemicals (EACs) are
estrogen receptor agonists and antagonists. Because of the many important roles of
estrogens in animals, xenoestrogens have the potential to impact environmental health. It
has been proposed that...
Soil, water, and climatic classification systems are reviewed as
background for the construction of a classification system for earthen
aquaculture ponds. The physical and chemical properties of important
soil types are also reviewed because of the critical role that the
soil plays in earthen pond systems. A pond classification system...
Red radish anthocyanin extract (RAE) was investigated for coloring brined
cherries as an alternative to FD&C Red No. 40. Red radish (Raphanus sativus L.)
anthocyanins were extracted from liquid nitrogen powdered epidermal tissue using
acetone, partitioned with chloroform, and isolated using C-18 resin. The monomeric
anthocyanin content was determined by...
The lack of information regarding the inheritance of the duration and rate of
grain filling, and the possible relationship between grain fill and grain protein
content in wheat prompted this study.
Early maturing Chinese cultivars, 'AI Feng 2' and 'CB 83-52', and late
maturing cultivars adapted to Oregon, 'Stephens' and...
The present investigation was undertaken to characterize a
number of strains of Lactobacillus bulgaricus and Streptococcus
thermophilus intended for use by a commercial starter supply
company. Thorough characterization of each culture was required in
order to combine compatible strains so that their usefulness in
Mozzarella cheese manufacture would be maximized....
An enzyme-linked immunosorbent assay was developed to
measure specific antibody response in bovine sera to bovine
adenovirus type 3 (BA3), an etiologic agent of respiratory
disease causing economic losses annualy to the cattle
industry. Observed endpoint titers were determined using
the intersection point from optical density values of
serially diluted...
The process of land acquisition for the conservation of plants or wildlife habitat
can raise controversial issues, issues often perceived differently by the individuals and groups
involved. After the land acquisition process is completed, there is rarely an opportunity to
analyze the differing perceptions of the issues and their relative...
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...
There is plenty of evidence from epidemiology studies
supporting a link between certain components in the human
diet and cancer incidence. It is estimated that 3-4 million
annual cases of cancer could be prevented worldwide just by
changing dietary habits. In parts of the world where
vegetables and fruits constitute...
Alcohol use/abuse among college students is a serious concern for
higher education. Despite efforts to address this problem student
use/abuse of alcohol continues. The purpose of this study was to
determine which of three alcohol education instructional approaches
more significantly impacted students' attitudes regarding the acceptance
of alcohol use/abuse. Three...
In 1982 a protohistoric archaeological site along the Applegate River in southwest Oregon was excavated by Oregon State University Department of Anthropology. Three housepits and a possible menstrual but were uncovered with lithic, faunal, and archaeobotanical elements recovered from house floors and hearths. Seven botanical taxa were represented by carbonized...
No-tillage winter wheat (Triticum aestivum L.) grown in a
wheat-fallow cropping system has consistently produced lower grain
yields than conventionally tilled soils in the semiarid Pacific
Northwest. A 2-year study was conducted in a long-term tillage trial
at Moro, OR to determine factors responsible for differences in wheat
growth and...
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...
This research evaluated the importance of select competencies in
the area of human behavior, important to home-based caregivers
employed independently and/or within a service agency in the State
of Alaska. Data were gathered from respondents working in
home-based care (N=76), and from those working in a related field
(N=38). Data...
A qualitative research approach composed of three strategies was employed to systematically examine the politics of natural resource collaboration. First, using the Oregon Plan for Salmon and Watersheds as a case study, the behavioral assumptions of natural resource policy instruments enabling collaboration were uncovered and analyzed. Three key assumptions emerge:...
The work presented in this thesis is concerned with the
effect of several antibiotics and quaternary ammonium
sanitizers upon growth of lactic acid bacteria. Section I
reports the purification of beta-lactamase from Lactococcus
cremoris PR-108, by ion exchange chromatography, using the
chromogenic substrate pyridine-2-azo-p-dimethylaniline
(PADAC) as the enzymatic indicator. Section...
The purpose of this study was to explore and describe
the nature of local school-community human service agency
collaboration undertaken to address the needs of at-risk
youth. The study focused on the experience of four youth
services teams in two Oregon counties.
A qualitative, multiple-case study approach was used as...
Previous studies suggest that vitamin B-6 supplementation can alter fuel metabolism during
exercise and plasma amino acid levels at rest. To examine the effect of vitamin B-6
supplementation on plasma fuel substrates and amino acid levels during exercise, five trained
males (age: 29±7; V0₂ max: 54.7±6.2 ml/kg/min) performed two separate...
This study examined the effect of vitamin B-6 supplementation and exhaustive
submaximal exercise on plasma catecholamine concentrations, and the relationship
between plasma catecholamines and fuel use, heart rate and oxygen consumption. Five
trained men (age= 18-35 years; V0₂max=53 ml 0₂/kg/min.) participated in two controlled
dietary periods that were identical except...
Attempts to develop dual-purpose durum wheat cultivars for both pasta and bread-making
have been unsuccessful. To better understand this limitation, thirty durum
genotypes, selected based on their diverse geographical origin, and five bread wheat
cultivars were compared as to their flour mixing properties, dough physical characteristics
and baking performance. The...