Index Catalog // ScholarsArchive@OSU

Aspects of the social structure of the California ground squirrel (Spermophilus beecheyi) in western Oregon

Creator:: Bickford, Carol E.
Abstract:: A population of Spermophilus beecheyi was studied to determine patterns of individual spacing, behavioral interactions among different sex and age classes, and the relationship between aspects of S. beecheyi social structure and sociality to those of other sciurids. Research was conducted on a population of squirrels living in an abandoned...
Resource Type:: Masters Thesis

Glutathione peroxidase and selenium distribution in semen and reproductive tissues of farm animals

Creator:: Alabi, Nathaniel Sigismund
Abstract:: 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)...
Resource Type:: Masters Thesis

Interaction of selenium with cadmium and mercury in semen and reproductive tissues: in vivo and in vitro studies

Creator:: Alabi, Nathaniel Sigismund
Abstract:: 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...
Resource Type:: Dissertation

Deposition and persistence of polynuclear aromatic hydrocarbons after slash burning clear-cut sites in Oregon

Creator:: Sullivan, Timothy Joseph
Abstract:: Research has been completed which identifies qualitatively and quantitatively the deposition, persistence and fate of polynuclear aromatic hydrocarbons (PNAH) on burned clear-cut sites in Oregon. Eight PNAH were identified and quantified in post-burn litter samples taken from four slash-burned sites. Deposition of lower molecular weight, 3-4 ring compounds was considerably...
Resource Type:: Dissertation

The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep

Creator:: Tanida, Hajime
Abstract:: I. The Effect of Artificial Photoperiod on Eating Behavior and Other Behavioral Observations of Dairy Cows. Twenty-eight cows were randomly assigned to a dairy photoperiod of 18 h light and 6 h darkness or to continuous light and observed 1 d each month from December 1981 to February 19.82. Lighting...
Resource Type:: Masters Thesis

Endocrinology of fur growth and reproduction in mink

Creator:: Rose, William Jackson
Abstract:: 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...
Resource Type:: Dissertation

Oxytocin synthesis and release by the bovine corpus luteum

Creator:: Abdelgadir, Salaheldin Eltigani
Abstract:: Four experiments were conducted to determine oxytocin concen tration of bovine luteal tissue at different stages of the estrous cycle and to study the effects of prostaglandins F₂α (PGF₂α), E₂ (PGE₂), luteinizing hormone (LH), cycloheximide, colchicine and cytochalasin B on oxytocin synthesis and release in vitro. In experiment 1, luteal...
Resource Type:: Dissertation

Temporal effects of Dexamethasone on skeletal muscle protein metabolism in rabbits

Creator:: Yeh, Jan-ying
Abstract:: Glucocorticoids are growth-inhibiting steroids. They have been reported to reduce muscle growth by reducing protein synthesis. However, their actions on muscle protein degradation remain equivocal. Glucocorticoids have been reported to transiently increase muscle protein degradation, to not affect this process and to reduce muscle protein degradation. Reasons for these conflicting...
Resource Type:: Masters Thesis

Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon

Creator:: Gudjonsson, Sigurdur
Abstract:: A hierarchical classification system of Iceland's watersheds and rivers is presented. The classification is based on Iceland's substrate, climate, water, biota, and human cultural influences. The geological formations of Iceland are very different in character depending on their age and formation history. Three major types of formations occur: Tertiary, Plio-Pleistocene,...
Resource Type:: Dissertation

Peptidergic regulation of visceral motor circuits in the Sea Hare, Aplysia californica

Creator:: Morgan, James L. M.
Resource Type:: Dissertation

ScholarsArchive@OSU

Aspects of the social structure of the California ground squirrel (Spermophilus beecheyi) in western Oregon

Glutathione peroxidase and selenium distribution in semen and reproductive tissues of farm animals

Interaction of selenium with cadmium and mercury in semen and reproductive tissues: in vivo and in vitro studies

Deposition and persistence of polynuclear aromatic hydrocarbons after slash burning clear-cut sites in Oregon

The effects of altered photoperiod and of sound stimulation on feeding and other behaviors of dairy cattle and sheep

Endocrinology of fur growth and reproduction in mink

Oxytocin synthesis and release by the bovine corpus luteum

Temporal effects of Dexamethasone on skeletal muscle protein metabolism in rabbits

Classification of Icelandic watersheds and rivers to explain life history strategies of Atlantic salmon

Peptidergic regulation of visceral motor circuits in the Sea Hare, Aplysia californica

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