A Cr₂0₃, and cellulose fibre mixture was used with cattle, in
three grazing and two semi-restricted experiments, to study the mode
of its excretion, the possibility of using it in a once-daily dosing and
grab-sample regime to estimate fecal output and in a field experiment
to test a hypothesis involving...
Home-based counseling (HBC) occurs when counselors provide therapy services to individuals and families within the clients’ home environment. Since its inception in the 1980s, HBC has become a common practice within the counseling field. In 2014, the U.S. Bureau of Labor Statistics (2014) named HBC one of the fastest-growing divisions...
Mutations to superoxide dismutase were the first proven cause of Lou
Gehrig’s disease (amyotrophic lateral sclerosis; ALS) implicating superoxide in
the selective death of motor neurons that characterizes ALS. Nitric oxide
competes effectively with superoxide dismutase for superoxide to form the
powerful oxidant peroxynitrite. Endogenous formation of peroxynitrite can kill...
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Joseph S. Beckman
Mutations to superoxide dismutase were the first proven cause of Lou
Global increases in ultraviolet-B radiation (UVBR:290-
320 nm) resulting from decreases in stratospheric ozone
concentration have the potential to alter marine primary
production and affect global climate and marine trophic
dynamics. Effects of UVBR on phytoplankton carbon fixation
were determined from open ocean exposure studies conducted
off the coast of...
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...
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...
Problem
The purpose of this investigation was to examine the status of
high school psychology in the state of Oregon by comparing Oregon
high school psychology with (1) general information from the literature,
(2) information obtained from a survey of 130 high school psychology
teachers in the United States, (3)...
Freshwater (FW) and seawater (SW) acclimated yearling coho salmon, Oncorhynchus kisutch, were subjected to severe confinement stress in FW, SW, or a medium (1/3 SW) that was approximately isosmotic to the fish's blood. Chronic stress caused osmotic imbalances in FW and SW, but not in 1/3 SW. In SW, blood...
A study of orientation and homing in brush rabbits, Sylvilagus
bachmani ubericolor (Miller), was conducted on the E. E. Wilson
Game Management Area 7 miles north of Corvallis, Oregon, between
July 1967 and April 1969. Sixty-seven individual rabbits were fitted
with radio-transmitters and returned to the field. Home ranges were...
The goal of this thesis was to determine the physiological mechanisms that link adverse preplanting treatments of Douglas-fir, such as exposure and root pruning, to the phenomenon of transplanting shock. The objective of experiments 1 and 2 was to measure the effect of exposure and pruning on the physiology and...