In the summer of 1961, oil and gas companies began seismic explorations offshore on the Oregon coast. These explorations inspired interest in the effects of explosions on marine life. This document gives the results of two series of tests on the effects of underwater explosions on Dungeness crabs held in...
Data were taken, following irradiation exposure to
100r and 300r cumulative dose, on 89 rabbits of three
breeds that vary greatly in body size. Hematological,
intestinal motility, and ear vascularity examinations
were performed. Least square estimates have been obtained and an analysis of variance has been conducted in
order estimate...
"An investigation to obtain further information on the effects of underwater explosions on flatfish and crabs was conducted offshore in coastal marine waters of Oregon on September 6 and 7, 1962. The study was conducted by the Oregon Fish Commission and financed by several companies presently engaged in oil seismic...
The susceptibility of milk to copper-induced or accelerated off-flavors is well known. Other animal products, including meats have not been so extensively studied. In this study different species of animals (pigs, calves, lambs and rabbits) were fed on normal rations with and without supplements of copper sulfate. During the course...
The effects of estrogen treatment on uterine weight, uterine
nucleic acid content and adrenal weight were studied. Daily doses
of 0.05μg or 0.1 μg of Estradiol 17-β were administered subcutaneously
to seven day castrated female rats for periods varying
from 0 to 168 days. After two days of treatment uterine...
White muscle disease or muscular dystrophy of sheep is a selenium
responsive malady common to many areas with an inherent natural
deficiency of selenium in the forage. The disease can be prevented in
lambs by adding trace amounts (approximately 0.1 ppm) of selenium to
the otherwise selenium deficient, forage fed...
The effect of 2-aminoethyl-2-thiopseudourea[superscript .]Br[superscript .]HBr (AET),
2-mercaptoethylamine[superscript .]HC1 (MEA) and trisodium calcium chelate of
diethylenetriaminepentaacetic acid (CaNa₃DTPA) on the radiosensitivity
of rat fetus was investigated. A total of 1256 fetuses were
critically examined.
Exposure of rats to 200 r whole-body X-irradiation at 9.5 days
of gestation resulted in a...
A study on the effects of light quality and periodicity on the germination of Douglas-fir seed and the growth of Douglas-fir seedlings was conducted. Interest was focused on responses that could be measured and observed without biochemical assay. It was found that .Douglas-fir seed,s would respond to red-light treatments by...
Newborn rats exhibit a torporous response to cold stress at 2°C
from which they revive after several hours exposure even though
respiratory, cardiovascular, and muscular movements have ceased.
At less severe temperatures (20 to 25°C) the rats respond with a non-torporous
decrease in metabolic and physiologic activity and a lowering...
The objective of the thesis was to determine the effects of
isolated coumestrol on the growth, carcass characteristics and
certain organs of wether lambs. The first of two trials was conducted
over an eight week period with two groups of heavy wether
lambs. Trial two was conducted over an 11...
Published October 1966. 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
In three separate trials rats were fed either a basal diet deficient
in selenium and vitamin E or the same diet supplemented with
one or both of these factors. In addition to these treatments in two
of the trials, ethoxyquin was included to provide adequate lipid antioxidant
protection and to...
Beginning with the discovery of x-rays by Wilhelm
Konrad Roentgen in 1895, man has had the capacity to
greatly increase radiation levels of his environment,
especially with the advent of nuclear weapons in recent
years. Radioisotopes are finding progressively wider
use in medicine, research, power production, etc., with
increased hazards...
The effects of coumestrol on the uterine weight, uterine fluid
imbibition, uterine nucleic acid content, adrenal weight and body
weight of female rats were studied. Daily doses of 20 micrograms
of coumestrol per 0.1cc propylene glycol were administered subcutaneously
to spayed rats following a seven day recovery period,
for durations...
There were two studies involved in the thesis research. In the
first study, variation in the amount of adenohypophysis gonadotropins
among 22 individual beef bulls were investigated. These bulls
represented four inbred lines, and six linecrosses. The bulls were
raised in the Oregon State University purebred herd.
The bulls were...
By salt depleting the animals or by injecting them with
aldosterone, I was able to increase the active transport of sodium
across the isolated skin. The potential difference was increased
by 37% and 43% respectively and the net sodium flux by 69% and
62%. Exposure of frogs to 50 mM...
Published July 1966. 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
Studies were undertaken to determine the extent and rate of
binding of Hg-203 labeled phenylmercuric acetate and mercuric ace
tate in rat kidney and liver slices and their subcellular fractions
after 37°C incubation of the slices in Krebs-Ringer -phosphate solutions
containing the mercurials at 10⁻⁴ molar. A fast and parallel...
A total of five individual experiments were conducted with
gonadectomized, male sheep to study the influence of estrogen on
the plasma level of pituitary activities, with the greatest emphasis
given to gonadotropic activity. Estrogen treatments employed were
as follows:
1. 12 mg. diethylstilbestrol (DES) implanted subcutaneously.
2. 1 mg. DES...
An investigation of Mn uptake by five-day-old excised barley
roots revealed that a metabolically-mediated process was involved.
In short-term experiments, the rate of Mn absorption was comparable
to that of the macronutrient cations. Like other metabolically
absorbed cations, the Mn absorption rate was a direct function of
the ambient concentration...
Iodoacetic acid and diphenylamine were used in this study to
elucidate the mechanisms of resistance of Micrococcus radiodurans
to radiation. This organism, a gram positive, non-spore forming,
salmon-pink, tetracoccus has a LD₅₀ of 213,000 R when grown in
the absence of radio-modifying agents.
M. radiodurans, when grown in media containing...
The effects of changes in dosimetry conditions on the radiation
sensitivity of a constant biological population were determined.
The organism used for this study was the strain B of
Escherichia coli. The percentage survivals of these cells in an
aqueous solution were determined at the same total exposure with
different...
Four species of euryhaline teleosts (chinook salmon, Oncorhynchus
tshawytscha, Walbaum; staghorn sculpin, Leptocottus armatus,
Girard; starry flounder, Platichthys stellatus, Pallas; shiner perch
Cymatogaster aggregata, Gibbons) were exposed to x-rays. The irradiated
animals were maintained in either of two different environments.
The effects of x-radiation were determined by observing the
percent...
The purpose of this thesis is to determine if dietary and
metabolic relationships exist between cobalt and selenium. Two
groups of lambs were compared. The dams of one group of lambs
received an alfalfa hay adequate in selenium and the dams of the
other group received an alfalfa hay deficient...
Quantity variations in pigments and lipid classes were determined
following γ-irradiation of Micrococcus radiodurans, Sarcina
lutea, and Pseudomonas aeruginosa.
Pigmentation was determined by extraction with organic solvents
and measured as optical density at 475 mμ for M. radiodurans
and S. lutea, and 410 mμ for Ps. E aetuginosa. Pigments of...
In vitro studies of Mobam (4-benzo(b)thienyl N-methylcarbamate)
metabolism have demonstrated that at least three ether soluble
metabolites are formed in a microsomal system fortified with reduced
triphosphopyridine nucleotide (NADPH). One of the metabolites was
identical to 4HBT (4-hydroxy benzothiophene), the phenol of Mobam.
The other two metabolites did not possess...
In vitro studies of Mobam (4-benzo(b)thienyl N-methylcarbamate) metabolism have demonstrated that at least three ether soluble metabolites are formed in a microsomal system fortified with reduced triphosphopyridine nucleotide (NADPH). One of the metabolites was identical to 4HBT (4-hydroxy benzothiophene), the phenol of Mobam. The other two metabolites did not possess...
The effects of x-irradiation on quantitative genetic traits was
investigated by comparing the response of irradiated mice to selection
for litter size and 28-day weight with the response to selection
for the same two traits in non-irradiated lines. Irradiated lines
were maintained at three levels of x-irradiation, 25 r, 50...
The effects of x-irradiation on quantitative genetic traits was
investigated by comparing the response of irradiated mice to selection
for litter size and 28-day weight with the response to selection
for the same two traits in non-irradiated lines. Irradiated lines
were maintained at three levels of x-irradiation, 25 r, 50...
The effects of ultraviolet (UV) irradiation on photosynthesis and
various partial reactions involving the individual photoreactions of
photosynthesis were examined. These reactions included photo-reduction in adapted green algae, Hill reaction, cyclic photophosphorylation,
the 520 nm absorbance change and variable-yield fluorescence.
The reactions were measured in spinach chloroplasts and
isolated chloroplasts...
The brine shrimp, Artemia, was used as an experimental
organism to study the effects of ⁶⁰Co gamma irradiation on the reproductive
performance of an animal population. The total reproductive
ability of the brine shrimp was fractionated into various components
and the effects of irradiation on each of these components
was...
The cellular dynamics of the intestinal epithelium in the coho
salmon, Oncorhynchus kisutch, has been studied to determine the effects of temperature and whole-body X-irradiation.
In vivo experiments utilizing colchicine mitotic inhibiting technique and tritiated
thymidine (³H-TdR) radioautography were employed in order to
evaluate the kinetics of the cell population....
Numerous tests were applied to rainbow trout
of eleven months of age to determine whether
ascorbic acid is an essential element of the diet
of these fish. Although previous work had been
done on this question, conflicts in the results,
the large reliance upon abnormal symptoms such as
lordosis and...
A series of four trials were conducted to determine the influence
of selenium supplementation of a selenium- and vitamin E-deficient
basal diet on the absorption, excretion, tissue distribution
and placental transfer of a single dose of tritium-labeled α-tocopherol
in the rat.
In the first trial, the effect of supplementation of...