Cardicola alseae is a blood dwelling trematode found in the
fishes Salmo clarki henshawi and Salmo gairdneri gairdneri. Eggs
which were ovoid in shape and non-operculate left the adult and passed
to the gill capillaries of the secondary lamellae. The miracidium was
ovoid, 0.070 mm. long by 0.052 mm. wide,...
The thesis presented here is a quantitative study of vacant
urban land in Corvallis, Oregon. In order to present this study the
writer first studied the available literature and found that little had
been published dealing with causal factors of vacant urban land.
Rather, it was found that several writers...
Accumulating human impacts on freshwater ecosystems have created a biodiversity crisis for freshwater fishes while conservation efficacy remains hampered by the Linnaean shortfall, the ignorance of many species that have yet to be discovered and described. The past discovery of most freshwater fish species was simply a matter of collecting...
A unique mass-flow control system for the carrier gas
in gas chromatography is described and evaluated. Carrier
gas flow is controlled by a flow sensor, feedback electronics,
a flow-control valve and a microcomputer. The
flow-rate is monitored by a mass-flow meter by this system
and the flow is adjusted in...
There is a considerable amount of vacant land
zoned for industrial use within the Corvallis Urban Growth
Boundary. A detailed investigation of the area reveals
a total of 632.98 acres of such land. However, when closely
scrutinized, it appears that the total number of acres is
misleading, as only 77.50...
The purpose of this study was to investigate an application of
statistical concepts to quality control of highway construction. The
application was presented qualitatively and demonstrated quantitatively
by an investigation of asphalt content in asphalt concrete.
For the example, an Oregon State Highway Project was
sampled and tested. The average...
Karyotype analyses have been madeon only two on the six recognized species in the genus Pseudotsuga, Douglas-fir (P. menziesii) and bigcone Douglas-fir (P. macrocarpa). In this
study, a comparison was made between the karyotypes of Douglas-fir and Formosan Douglas-fir (P. wiloniana). The basic chromosome number of the Formosan Douglas-fir was...
Relationships between soil-water stress and plant-moisture
stress were studied with respect to soil classification and cambial
activity in Douglas-fir.
The study sites were forested with Douglas-fir and located in
McDonald Forest and near Marys Peak in the Oregon Coast Range.
Soil-water depletion was followed by the use of gypsum blocks...
The effluent from on-site sewage disposal systems has been
found to be a source of nitrates (NO
₃⁻
) in groundwater. Vegetation
has the ability to remove some of the nitrogen (N) from sewage
effluent as the solution moves through the soil around a disposal
trench, before it reaches groundwater....
Population dynamics of coastal cutthroat trout were studied in a controlled-flow section of Berry Creek, Oregon, from August 1972 to August 1973. All trout except the underyearlings were tagged to allow movement, survival and weight change of individual trout to be monitored. Fifty-eight percent of the tagged trout which were...
An attempt to determine the relationship between the computer,
the computer program exchange organization and today's practicing
civil engineer has just been completed. A questionnaire was used to
obtain information and opinions from 850 selected practicing civil
engineers. Based on those questionnaires reaching their addresses,
a return rate of 81.7...
The golf swing involves a complex sequence of body movements which adjust according to the demands of a given shot. The purpose of this study was to determine common characteristics and essential elements of the golf swing under various conditions. The swing patterns of thirteen elite professional golfers were analyzed...
The purpose of this study was to seek evidence which might
lead to the development of more effective ways of dealing with the
problem of failure to attend school.
Concept of self has long been considered worthy of consideration
in evaluating behavior. It is known that significant experiences
in life...
The purpose of this study was to investigate the interrelationships
between loneliness, college academic achievement, and locus of
control. The sample consisted of 97 subjects who were randomly selected
from those students living in the residence hall system at Oregon
State University.
Five null hypotheses were tested:
1. There is...
The purpose of the study was to determine whether taking a
course of study about ethnic minorities and racial prejudice in the
United States would produce a statistically significant change in the
attitudes of white, middle-class high school students toward three
ethnic minorities i. e., Blacks, Native Americans, and Chicanos....
The purpose of this study was to explore under controlled conditions
possible differences between teacher expectancy and child performance
at the first grade level. The Beaverton Public Schools participated
in the study with their first grade children and teachers, using an
examination administered to a random sampling of children and...
The purpose of this research was to determine the effects of a
college human sexuality course upon sex knowledge, attitudes toward
sexual behaviors of non-significant others, and attitudes toward the
sexual behaviors of self and spouse. In addition, the study sought to
investigate the relationship between knowledge gain and attitude...
This study examines the relative efficacies of the specific and non-specific
factors in psychotherapy. Psychotherapy is conceptualized as
having three common components: the problem component whose essence is
low self-esteem; the interactional component which induces change through
social influence; and the treatment component which elicits change through
therapeutic techniques. The...
The body of work aims to contribute to the area of Quantitative analysis in Environmental Sciences, and is focused on the microbiome. The underlying theme for the dissertation is methods and workflow. The unique bioinformatics workflow used for the analysis of genomic data was used to answer distinct and pressing...
The relationships between life in retirement and the quality
of marriage among retirees were examined-- specifically the
effects of selected factors associated with retirement on measures
of dyadic quality.
Two self-administered questionnaires were mailed to each of
522 households of retired Oregon educators and their partners.
Households were randomly selected...
Temperate climates are particularly conducive to
growth of annual bluegrass which readily invades and
dominates most cool-season turfgrasses. Ethofumesate
(2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl
methanesulfonate) is one herbicide available which will
selectively control annual bluegrass.
The primary objectives of this research were to
determine optimum application rates and timing of
ethofumesate for control of...
The main purpose of this study was to examine the influence of
additional content from areas of mainstreaming and adapted physical
education on preservice elementary educators attitudes toward
teaching nonhandicapped and handicapped children in elementary
physical education. To achieve this goal (a) an instrument was
constructed to assess the attitudes...
Organizations leading education reform of the 1980's
have challenged teacher education programs at colleges and
universities across the nation to improve the subject
matter content preparation of teachers. Past methods of
program development and techniques to assess teacher's
knowledge competence have been one-sided in their
approach. New research studies on...
Two management systems were evaluated in terms of the effects on
calf growth, on calf weight produced per cow per year, and on reproductive
performance of fall calving cows. The alternative management
systems tested were twin foster calf production and, delayed weaning,
production of single suckled calves weaned at the...
A sucrose density-gradient ultracentrifugation technique for
obtaining microsomes has been developed. This technique has
advantages over the classic differential centrifugation technique, in
that it is faster, is better suited to work with small quantities of
tissue, and offers the opportunity to work with a defined microsomal
sub-cellular fraction, rather than...
Studies in other laboratories have established the presence of
the Embden-Meyerhof-Parnas (EMP) pathway and the pentose phosphate
(PP) pathway in plant tissue. Research in this laboratory with mung
bean (Phaseolus aureus) seedlings has confirmed the presence of these
two pathways as well as the glucuronic acid (GA) pathway. However,
no...
The concept of a prestressed cylindrical shell was investigated. In particular, a cylindrical shell constructed from coiled pressurized tubing was analyzed. This analysis was concentrated in two main areas, the first involved the failure modes of the prestressed cylinder. Both the buckling and yielding behavior of the tube walls was...
This investigation has as its purpose: (1) to identify present
student personnel practices in evening community college programs,
(2) to identify student personnel practices considered "desirable" or
"undesirable" in evening community college programs, and (3) to
develop student personnel service guidelines for an evening community
college program.
Securing and Treating...
Field biology studies of three grain aphids, Macrosiphum
avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum
padi (L.) were conducted near Corvallis, Oregon, from 1961 to
1964.
Populations of M. avenae were found on grain plants, and
alatae entering spring barley may have been from wheat fields. Specimens
were found more...
Riparian communities in the southern portion of Malheur National
Forest were intensively studied with the objective of designing an approach for
classifying disturbed riparian areas into units of similar potential. Not all
riparian community types in this portion of the Blue Mountains were sampled
due to time limitations. Some of...
The purpose of this study was to compare the performance
between high school students with esteem needs and those with
security needs in discovering a two-second delay between correct
response and feedback in a paired-associated learning task, Subjects
had to determine which one of seven possible responses (digits) to a...