Forestry in the United States is no longer merely a theory or a subject for discussion; it has gotten down to concrete things in the woods. Nor is the growing of timber confined to public lands; it is gradually making headway on land in private ownership. It is becoming an...
The price of gold has risen from $60.35 per ounce in mid-November, 1972, to $91.25 per ounce in mid-April, 1973. The present high price has caused considerable speculation as to the underlying reasons for the sudden increase and what effect it may have on the international monetary situation. This precious...
The purpose of this study was to assist the development of an
improved industrial arts curriculum and laboratory facilities that
reflect the industrial technology. The project attempted to
ascertain which of the process operations of the technology may
become curricular components in the curriculum. In addition, it
attempted to identify...
The rate of the C¹⁴0₂ release from glucose, specifically labeled
with C¹⁴ at 1, 2, 3+4, and positions, was used to study the relative
participation of pathways of glucose catabolism in red beet slices.
Evidence was obtained which indicated that in mature red beets glucose
was catabolized mainly via glycolysis-tricarboxylic...
How should reinforcement learning (RL) agents explain themselves to humans not trained in AI? To gain insights into this question, we conducted a 124 participant, four-treatment experiment to compare participants’ mental models of an RL agent in the context of a simple Real-Time Strategy (RTS) game. The four treatments isolated...
The purpose of this pilot study was to determine whether students
using a series of planned exercises designed to improve typewriter
composition skills would be better able to compose at the typewriter
than students in a control group. The study was also concerned with
the effect that the use of...
The research presented in this thesis was designed to evaluate
the effects of feeding alfalfa hays from the Klamath Basin of Oregon
in practical dairy rations on milk fat production in high-producing
Holstein cows. Thirty-two second lactation or older animals estimated
to be capable of producing at least 70 lbs...
The variety of natural disasters provide different sets of characteristics and properties with unique challenges. One significant difference between hazard types is prewarning lead time, the amount of time individuals have from a potential warning to the disaster occurring. Rapid onset disasters may not provide an official warning about a...
Long-term, large-scale studies of meta-ecosystems provide critical information about how global change influences communities. In my dissertation, I analyzed data from studies encompassing 18 years (2006 – 2023) and over 1,000 km of coastline to investigate drivers of rocky intertidal community structure and dynamics. Specifically, I explored the roles of...
Intact and ovariectomized (OVX) pony mares were randomly assigned to treatments of morphine (M), naloxone (N), or a saline control (C) to determine if endogenous opioid peptides (EOP) play a role in equine seasonal breeding. Morphine was expected to decrease luteinizing hormone (LH), whereas N (an opiate antagonist) should in...
1-Phenyl-3-(2-Thiazoly1)-2-Thiourea (PTTU), has been reported to
inhibit dopamine-fi-hydroxylase (a copper-containing enzyme involved in
the pathway of biosynthesis of adrenaline in animal systems). In the
present study, PTTU has been shown to have cytokinin activity in the
tobacco bioassay. The cytokinin activity of PTTU suggested that
cytokinin-active N⁶-substituted adenine derivatives might...
Hexachlorophene (HCP; 2,2'-methylenebis-(3,4,6-trichlorophenol))
was developed as an antibacterial agent but was also found to induce
toxic effects in various tissues in animals and humans. Changes were
found in myelinated nerve fibers and cerebral white matter. Erythrocytes
are hemolysed in vitro. Oxidative phosphorylation is uncoupled
by HCP at concentrations less than...
Three highly purified forms of cytochrome P-450 (P-450a, P-450b, P-450c) from Aroclor 1254-induced rat hepatic microsomes catalyzed the monooxygenation of 1-(2- chloroethyl)-3-(trans-4-methylcyclohexyl)-1-nitrosourea (MeCCNU) and 1-(2-chloroethyl)-3-(cyclohexyl)-1-nitrosourea (CCNU) in the presence of purified NADPH cytochrome P-450 reductase, NADPH and oxygen. Cytochrome P -450- dependent monooxygenation of CCNU gave six alicyclic hydroxylation products...
The behavioral repertoire of the sea anemone, Anthopleura
xanthogrammica, was investigated to test for the occurrence of any
immediate response to various regions of the electromagnetic spectrum.
Monochromatic radiations in the visible and ultraviolet spectral
regions were produced by a 150-watt xenon lamp or a ZOO watt mercury
vapor lamp...
Aflatoxins B₁, Q₁ and aflatoxicol, R [subscript o] F, but not B₂ were activated in the presence of NADPH by the 105,000 x g pellet from rainbow
trout (Salmo gairdneri), Mt. Shasta strain, liver to products lethal to
Bacillus subtilis GSY 1057 (metB4, hisAl, uvr-1). Electron microscopy
confirmed the microsomal...
An aspect of the metabolism of monoalkylhydrazines has been
investigated using both intact rats and rat liver microsomal enzyme
preparations.
Intact rats respired propane and n-butane on administration of 0.3-0.5 mmoles of isopropyl- and n-butylhydrazine, respectively.
Based upon dose administered, a five to ten percent
yield of hydrocarbon was obtained....
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...
A short history is given of cathode-ray tubes, from the
earliest laboratory tubes available during the early 1900's through
present day high performance tubes. Special attention is paid to
the development of post-deflection acceleration types especially
band-type PDA tubes and an improvement on that type known as the
helix-type PDA...
Statistical data from breeding experiments suggested that a
reciprocal chromosomal translocation had spontaneously occurred in
a line of S. C. White Leghorn fowl. Approximately 50% of the
embryos from matings between suspected translocation heterozygotes
and normal birds died early during incubation. In an effort
to obtain cytological proof of this...
Forty-five subjects were given 30 trials of isometric elbow flexion
and 30 trials of elbow extension. Each trial consisted of maximum
exertion followed by a short rest in 10 second cycles. Subjects were
ranked on the basis of the addition of the median flexion and extension
scores and were divided...
The effects of burial by tephra (volcanic aerial ejecta) on
forest understory plants were examined northeast of Mount St. Helens,
Washington, in the area where the 18 May 1980 eruption deposited
tephra but did not destroy canopy trees. At six sites along a tephra
depth gradient from 2-15 cm, understory...
The development of technologies such as Building Information Modeling (BIM), light detection and ranging (lidar), and sensor-based systems poses new opportunities for researchers to rethink how construction safety and health can be approached during the design, planning, and construction phases of a project. Nevertheless, the majority of the technology applications...
Ninety-two spring-born and 76 fall-born steer and heifer calves
(Hereford and Angus x Hereford) averaging 188 and 255 kg, respectively,
were utilized in a 2x2 factorial arrangement of treatments to study
the effects of zeranol and monensin, alone and in combination, on
growth rate, feed efficiency and carcass characteristics. After...
A series of eight trials was conducted to determine if supplementation
with arginine improved growth of young rats, Japanese quail
and swine fed low-lysine diets. In five rat trials, with a variety of
basal diets, no evidence of a "sparing effect" of arginine on the lysine
requirement was found. A...
A comparison was made of the d.c. conductivity of KCI:Pb²⁺
and KCl:PbO single crystals at temperatures greater than 325°C.
The energy of activation was 0.72 ev for all crystals. Lead concentration
was determined by chemical, optical and electrical methods. The
half band width of the UV absorption band at 273...
The life history of the strawberry root weevil, Otiorhynchus ovatus (L.), on peppermint was studied in the Willamette Valley of Oregon to provide the information necessary to develop effective control measures. Adult weevils emerged from the soil from late May until mid- June and were active in the field until...
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...
Approximately 4,210 feet of Late Cretaceous and 1,440 feet of Tertiary sedimentary rocks are exposed in the Salt Wells Anticline area of southcentral Sweetwater County, Wyoming. Late Cretaceous units include the Blair, Rock Springs, Ericson, and Almond Formations of the Mesaverde Group and the Lewis Shale; Tertiary units include the...
Full Text:
AN ABSTRACT OF THE THESIS OF
DONALD ALBERT HARTMAN
(Name of
The data gathered for the study of the health status of freshmen
at Oregon State University were derived by an analysis of health history
records. These were obtained from the Oregon State University
Health Service. The years sampled were 1930, 1940, 1950 and 1960;
300 freshman male and 300 freshman...