Five forms of chromatin, which represent the in vivo folded forms
of nucleic acid, were isolated and used as the binding substrate for
model intercalating compound, ethidium bromide. For all forms of
chromatin, the affinity, location and structural effects of binding
were examined. On the level of the nucleosome, the...
Plasma membranes from Saccharomyces cerevisiae were prepared by a new procedure involving lyticase treatment of the yeast cells. The plasma membranes were right-side out, closed vesicles of uniform appearance with a sterol to phospholipid molar ratio of 0.365. The thermotropic behavior of these plasma membranes from wild-type yeast and from...
The energy levels of internal waves observed during the
Arctic Internal Wave Experiment (AIWEX), conducted from the
drifting pack ice in the Beaufort Sea, increased as the speed of
the ice drift increased. The possibility of these waves being
generated by moving pack ice with a corrugated under-side is
explored...
Since the early 1950's, the distribution of sediment at the
mouth of Redwood Creek has been altered by the effects of channel
aggradation and channelization along the lower reach. Severe flooding
in 1953, 1955, and 1964 caused bank erosion, landsliding, and
channel geometry changes along Redwood Creek. The increased sediment...
Fluctuating feeder cattle prices have a direct affect on the
revenue variability of feeder cattle producers. Hedging in the commodity
futures market is a marketing strategy which can, if properly used, reduce
the financial risk of feeder cattle producers. If the closing
basis value is known when a hedge is...
The purpose of this study was to examine the relationship between career development and locus of control as
they relate to barriers encountered in career development.
The sample included 144 students in the engineering
program at Oregon State University. The Rotter Internal-
External Scale and the Career Development Inventory (Form...
Gravity measurements made during 1979 and 1980, combined with
existing gravity measurements, provide data for the interpretation
of upper crustal structures relevant to the assessment of the geothermal
potential of south-central Oregon.
West of Upper Klamath Lake, free-air gravity anomalies trend
north-south and average near 35 mgals. East of Upper...
The feeding ecology of a common temperate mesoherbivore, the oligophagous sea slug Placida dendritica (Gastropoda: Opisthobranchia: Ascoglossa), was examined from April 1985 to June 1989. Along the central coast of Oregon, Placida consumed three host species: the low intertidal green algae Codium setchellii, C. fragile, and Bryopsis corticulans. Individual slugs...
Adolescent pregnancy is a serious problem which creates social and
emotional consequences for 1 in 10 teenaged girls and their families.
Although the severity of the problem has been well documented in the
literature, few empirical investigations have been conducted to expand
information or to aid in the understanding of...
Genetic studies of Tilletia spp. have been hampered by the lack
of genetic markers. The work discussed here is a first report of the
isolation of genetically marked strains of J. caries and their use in
wheat plant infection studies. Procedures for the isolation of auxotrophic and drug-resistant mutants in...
Using the counterflow virtual impactor, a new instrument for sampling cloud droplets, measurable levels of light-absorbing material were found to exist inside droplets in stratocumulus clouds off the coast of southern California. Eighty percent of the samples of droplet residue material had light absorption coefficients ranging from 6 to 20...
Published May 1981. 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
Published November 1982. 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
A five year longitudinal study was begun in 1976 to find a
solution to the problem of early primary children who fail in school
and then adopt the failure syndrome. The study was conducted in four
elementary schools in Oregon which had distinctly different
socio-economic populations.
The tests used for...
Soybeans were grown in hydroponic solutions and in perlite to
devise procedures to measure plant mineral accumulation and
solution depletion over time. Electron emission spectrometry and
micro-Kjeldahl-autoanalyzer analytic techniques were used to
monitor mineral content of individual plants and their corresponding
solutions. An automated computer assisted system of converting
raw...
Rhizobium, in symbiotic association with leguminous plants, is able to fix atmospheric nitrogen after first forming root nodules. Since polyamines are associated with and found in high concentration in rapidly growing cells and are thought to be important for optimal cell growth, it is possible that these polycations are involved...
This compilation of theses and dissertations (a part of the OSU Bibliographic Series) for the period 1970-1977 reflects this university's emphasis on research and graduate study. It may be viewed as an indicator of the contributions made to the state of Oregon through graduate study and research at Oregon State...
Agrobacterium tumefaciens, the causative agent of crown gall
disease, does not readily infect commercial varieties of alfalfa (Medicago sativa). Cloned virulence genes from the megaplasmid pTiBo542 have
been shown to enhance Agrobacterium host range and infectivity on
dicotyledonous plants. To obtain a gene transfer system for commercial
alfalfa cultivars, an...
Behavior of grizzly bears (Ursus arctos) toward people was
studied by examining hikers' reports of grizzly bear observations
and by intensively observing grizzlies in an area of Glacier National
Park that was heavily used by day-hikers. Of concern were the apparent
habituation of grizzly bears to people in the study...
The optical Bloch equations for a two-level atom in a laser
beam with an amplitude of arbitrary time dependence are derived in
the rotating wave approximation. The light scattered by the atom
is investigated for the special case of an intense, resonant laser
beam with a sinusoidally modulated amplitude. The...
This thesis presents my research on the hardware and software for
control of a novel robot based on the Stewart Platform. The robot has
six actuators which must be adjusted to arrive at the desired position
of the platform. This position must be specified by six position
parameters; namely the...
This research evaluated the statistically-related
computer application tasks which were deemed to be important
to the graduate curriculum of doctoral students who
major in Education. Data were gathered from samples of
foreign (N=22) and American (N=117) students who held
degrees in Education from Oregon State University.
The sixteen (16) item...
Changes of density occur naturally in phase transition processes and introduce the bulk movement of material. It is customary in analyzing such problems to disregard this unpleasant complication and assume the densities to be equal. However, such changes are unavoidable and for one-dimensional problems the complexities introduced by this bulk...
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...
Contrasted to the rich body of literature on ill children in
medical settings, well children's reactions to routine health care has
drawn little attention. This study assessed healthy children's under
standing of their bodies, medical procedures, and how this knowledge
relates to their behavior during routine health care. The study...
Many miles of roads are built in the Pacific Northwest Forests to provide access for logging and fire protection. Logging roads often cross steep mountainous terrain. Logging roads and the associated cut and fill slopes represent a discontinuity in the natural stress state in the soil mantle. These conditions result...
A new method is developed for solving linear optimization
problems based on the RPM network modeling technique which represents
the primal and the corresponding dual models simultaneously
upon a single graph. The network structure is used to eliminate
the need for explicit logical variables and to provide a graphic
tool...
Hypotheses concerning relative costs of inbreeding and
outbreeding were evaluated for the harpacticoid copepod Tigriopus
californicus, which inhabits high intertidal tidepools. Field
studies indicate high variation in biotic and abiotic parameters
among pools. These findings coupled with previous information
about very low dispersal rates and local adaptations to individual
pools...
Composition and structure of Oregon ash
(Fraxinus latifolia) woodlands in the William L. Finley
National Wildlife Refuge, Oregon are described. Twenty
stands dominated by Fraxinus latifolia were sampled with
500 m2 circular macroplots in which floristic microplot
data were collected for plant community synthesis. Plant
communities were identified by computer-assisted...
A study was initiated to 1) determine which species of
gastrointestinal nematodes are present in cattle in selected areas of
Oregon, 2) examine the seasonal abundance of these nematodes as an
indicator of periods of transmission and 3) determine at what season
developmental inhibition occurs in the major genera of...
Spore dispersal gradients and pod disease gradients from point
inoculum sources of Botrytis cinerea were measured over time in two
snap bean field experiments. Laboratory grown inoculum was placed
at ground level in a 30 x 30 cm square at bloom initiation and
removed at full bloom. Dispersal of inoculum,...
Public Law 94-142, passed in 1975, mandated that all children receive a free and
appropriate education regardless of the extent of their handicapping condition. Handicapped
students were to be educated in the "least restrictive environment" possible. Placing handicapped
students in regular classrooms has been termed "mainstreaming." Mainstreaming has produced
concerns...
Prothoracicotropic hormone has been partially purified
from whole heads of tobacco hornworm larvae, Manduca sexta.
Activity was followed with a larval bioassay. Activity was
purified 4400 fold from crude extracts. The hormone was
found to be a heat-stable polypeptide with an approximate
molecular weight of 25,000 Daltons. The hormone has...
Phytophthora cactorum lacks sterol synthesis capability. Nevertheless,
it exhibits vegetative growth in the total absence of sterol.
Supplementation of the growth medium with sterol, however, resulted in
a three-fold increase in cell yield. This increase was shown by whole
cell and cell free experiments to be the consequence of altered...
Plasma membranes isolated from a yeast sterol auxotroph (RD5-R)
grown on 1,5, and 15 pg m1⁻¹ exogenous concentrations of sterol showed
no discontinuity in plots of steady-state fluorescence anisotropy.
Liposomes constructed from phospholipid and sterol extracted from RD5-R
grown on different sterols indicated exogenously supplied sterol
modulated cellular phospholipids such...
The effects of five cytokinin antagonists on the growth
of cytokinin-autonomous lines of Phaseolus lunatus cv.
Kingston, Phaseolus vulgaris cv. Great Northern, and
Nicotiana tabacum cv. Wisconsin 38 callus tissues have been
compared. The antagonists tested included four N⁴-substituted 4-amino-2-methylthiopyrrolo[2,3-d]pyrimidines
bearing the following N⁴ side chains, 4-n-pentyl-
(ms²pnN⁴Prp), 4-n-hexyl- (ms²HxN⁴Prp),...
Characteristics of bacterial clearance were investigated in the
purple sea urchin, Strongylocentrotus purpuratus (Echinodermata:
Echinoidea). Primary clearance kinetics were determined for three
bacteria, a marine Gram negative motile rod, a marine Gram positive non-motile
rod, and a fresh water fish pathogen, Aeromonas salmonicida.
Various doses of live bacteria were injected...
Published January 1980. 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
The number of varieties of ryegrass (Lolium spp.) has increased greatly in recent years. An accurate and rapid laboratory technique to identify these varieties would benefit the consumer as well as protect an organization's Plant Variety Protection rights. There is also a need for a technique to complement the seedling...
This thesis presents our investigation of the problem of creating an intelligent tutor for solving algebra word problems that employs effective pedagogy. Among our major concerns are the problems of sufficient knowledge and proper knowledge organization. From student protocols and test papers, we derived sets of general purpose strategic rules...
Space flight results in loss of mass and function in skeletal
muscle. Data from manned flights and animal biosatellites give
evidence of possible changes in neuromuscular interactions.
Components at the neuromuscular junction are a potential site of
action for this space-induced muscle atrophy. We examined the
nicotinic acetylcholine receptor population...
Seventeen populations of Gila Baird and Girard are identified from the Alvord Basin of southeastern Oregon and northwestern Nevada. Gila in the Alvord Basin occupy a wide range of habitats, including warm springs, cool springs, creeks, reservoirs, and a thermal lake. These populations became isolated in remnant habitats when waters...
The Whale Cove Site, 35LNC60, is a shell midden, showing
occupations from 3010 B.P. to 330 B.P., spanning the Early and Late
Littoral Periods. Analysis of mammalian faunal remains, bone and
antler tools, lithics and discriptions of recovered shellfish
artifacts allows for chronological refinement of the previously
mentioned archeologically defined...
The stability of a limpet-dominated community was
assessed in a experiment in which an consumer was
temporarily removed. Compared to unmanipulated plots,
the limpet-exclusion plots developed greater algal
abundance and altered species composition of both algae
and barnacles. The community was not perturbed beyond
its capacity to recover, since the...
Being old and female in America often means being alone and poor. To offset this outcome financial preparation for retirement should begin in the pre-retirement years. The purpose of this exploratory study was to assess the financial preparedness of mature, single women as they approach retirement by examining the relationships...
The purpose of this study was to compare the Chapter I supplemental mathematics program CAI with other Chapter I supplemental mathematics programs, Prescription Learning and the traditional "pull-out" program, in terms of achievement and retention of mathematics basic skills. There were 577 Chapter I students from 12 middle schools and...
The dramatic upsurge of contract-supported archaeological activity,
generated by legislative action, has precipitated an increase
in information about Oregon's prehistoric peoples. This information,
however, has not been presented in a format which can be easily
understood by the general public.
This study presents an account of early peoples in Oregon,...
This is a listing of both PhD and Master's· theses relating to the areas of forestry issued during the period from July 1976 to June 1981. The
list is arranged first by state, then by college or university within each state. Authors of theses are arranged alphabetically under each of...
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...
The Columbia River Gillnetter is the pilot of the Lower Columbia River commercial fishing industry, keeping fishermen and the public in touch with today's important issues.
The purpose of this study was to explore relationships between
clothing interest and body awareness, between clothing interest and
selected demographic variables for college men and women, and between
body awareness and selected demographic variables for college men and
women.
To assess these relationships two measures were used. Body
awareness,...
Some elementary teachers want to be more child-centered in their
teaching. They are trying to consider the needs of the students
before the coverage of curriculum. Much of the inspiration for this
educational approach has come from the British primary schools.
The purpose of this study was to see if...
In February 1905 the Oregon State Academy of Sciences formed in
Portland to promote scientific research and diffusion of scientific
knowledge in Oregon. The founders also planned to assist in the
discovery and development of the state's natural resources. The
Academy was the first scientific society in Oregon with professional...
The purpose of this study was to examine the responses to a mail
survey of a random sample of female subjects (Ss), who at the time of the
study were members of the Oregon Public Employees Union employed as
clerical specialists by the State of Oregon, in order to: 1....
The study was undertaken to investigate characteristics of
consumers of used clothing and the outlets in which used clothing is
sold. The investigation of consumer characteristics involved demographic factors such as sex, age, educational level, employment
status, family composition, income level, user of clothing purchased,
use of clothing, reasons for...
This research project compared teacher attitude using
the Pupil Control Ideology Form with student attitude using
the Arlin-Hills Student Attitude Survey. P.C.I. Forms
were collected from 834 teachers from 95 elementary Christian
schools in several states. A total of 1074 student
attitude surveys were collected from Christian school students
in...
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...
During the summer of 1986, an archaeological testing project was
completed at seven prehistoric campsites primarily located in the
upper Deschutes River Basin of central Oregon. Testing was focused on
two low-density "lithic scatters", an archaelogical site type which is
especially abundant in this obsidian-rich region but which, to date,...
Global atmospheric pollution from chlorofluorocarbons has the
potential of causing significant reductions in the concentrations of
stratospheric ozone. If the production of chlorofluorocarbons were
to continue into the future at the rate prevalent in 1977, the
steady state reduction in total global ozone could be between five
percent to ten...
Increasing demand for home birth has created an upheaval in the
American medical profession and, is a controversial political and
legal issue as well. This research, utilizing ethnographic, historical,
and survey data analyzes contemporary home birth.
A review of the so called "medicalization" of childbirth is presented noting that the...
The individual through earliest recorded history reveals contradictory views of the
human life-span. "Am I a free and unique individual, able to make choices and decide my
own destiny?, or, "Am I only a victim of circumstance, a speck of dust in the universe's
whirlwind of fate?"
Each view is...
The primary problem of this study was to evaluate the post-high
school plans component of a high school counseling program. The
intent was to determine the effectiveness of the program component in
relation to the purpose it was designed to serve: providing information
and guidance for high school students who...