Experiments were conducted to determine: 1) the effects of exogenous melatonin and reduced photoperiod on molting and growth of the winter pelage (fur) and 2) whether changes in serum prolactin levels of treated and control mink during this same period were correlated with growth of winter fur. Adult and kit...
Studies were conducted to investigate the metabolism of
selenium (Se) , and the influences of Se on the metabolism of cadmium (Cd) and inorganic mercury (Hg) in rats, and in ram semen in
vitro. Se-deficient (-Se) or Se-adequate (+Se) rats were injected intraperitoneally with either ¹⁰⁹CdCl₂ (5 μCi/rat) or ²⁰³HgN0₃...
Purebred Yorkshire gilts with weights ranging from 70 to 105
kilograms were moved from a total-confinement rearing unit to a
total-confinement brood stock unit where approximately ten gilts
per pen were mixed to provide new penmates. Each gilt was thus
exposed to an unfamiliar environment and to foreign penmates along...
Five simulated precipitation patterns characteristic of the Columbia
Basin and Plateau region and six fertilization rates were evaluated
for their effect on percent crude protein, percent in vitro dry matter
digestibility, fiber content, and yield of wheat aftermath on a commercial
farm in north central Oregon.
The higher moisture regimes...
This study was conducted to investigate the distribution
of glutathione peroxidase (GSH-Px) and selenium in
semen of the boar, bull, ram and stallion, and in the reproductive
tissues of the boar, bull and ram. The effect
of repeated noncryoprotective freeze-thawing on GSH-Px
activity was also studied. Both hydrogen peroxide (H₂0₂)...
Senecio jacobaea (tansy ragwort) is a poisonous plant responsible
for livestock deaths in the Pacific Northwest. Horses and cattle are
susceptible, while sheep are resistant to the toxic action of the
pyrrolizidine alkaloids which the plant contains. Hepatic enzymes
are responsible for the biotransformation of pyrrolizidine alkaloids
into tissue damaging...
PURPOSE: The purpose of the study was to identify a set of core competencies needed to meet the minimal requirements for high school graduation and to test their level of acceptance by administrators, counselors, teachers and parents in 50 Oregon secondary school districts. PROCEDURES: Utilizing the 1136 existing graduation competencies...