Index Catalog // ScholarsArchive@OSU

Vegetation-soil relationships in some Artemisia types in northern Harney and Lake Counties, Oregon

Creator:: Eckert, Richard Edgar
Resource Type:: Dissertation
Full Text:: conmiittee--Drs. D. D. Hill, D. W. Hedrick, J. E. Oldfield, W. W. Chilcote, and E. G. Knox--for their

Historical land use and its impact on Oak Creek, Oregon

Creator:: Yamaguchi, Keiko, 1964-
Abstract:: The purposes of this study were:1) to review the land use history of Oak Creek watershed since European settlement. And 2) to consider the human-caused impacts and their effects associated with different land uses. The study area was classified into three land use patterns: residential,agricultural, and forested areas.Since the European...
Resource Type:: Masters Thesis
Full Text:: Department of iangeiland Resources Redacted for Privacy jDean of Gradu e School( Date paper is presented

Vitamin E, selenium and tri-o-cresylphosphate interrelationships

Creator:: Shull, Lee R.
Abstract:: A two-part study was conducted to investigate some of the nutritional relationships between dietary tri-o-cresylphosphate (TOCP), a toxic stress material, and dietary vitamin E and selenium. In part one, growth rate of male weanling Long-Evans rats and day-old Japanese quail (Coturnix coturnix japonica) was used to determine the protective action...
Resource Type:: Masters Thesis
Full Text:: Vitamin E, selenium and tri-o-cresylphosphate

Analysis of two alternative management systems for the production of fall born beef calves in western Oregon

Creator:: Rosecrans, John Gerald
Abstract:: Two management systems were evaluated in terms of the effects on calf growth, on calf weight produced per cow per year, and on reproductive performance of fall calving cows. The alternative management systems tested were twin foster calf production and, delayed weaning, production of single suckled calves weaned at the...
Resource Type:: Masters Thesis
Full Text:: : William D. Hohenboken Two management systems were evaluated in terms of the effects on calf growth, on

Nutrition and management of the beef unit for production of slaughter animals on range and improved pastures in southeastern Oregon

Creator:: Daugherty, Dennis A.
Abstract:: Studies were conducted over a two year period to evaluate alternative finishing methods for spring and fall-born beef cattle. Management alternatives from birth to slaughter included season of calving, lactating cow nutrition, preweaning calf nutrition, weaning age, calf and yearling winter nutrition, range and irrigated pasture supplementation, grazing practice, range...
Resource Type:: Dissertation

In vitro and in vivo evaluations of chemically treated ryegrass straw

Creator:: Anderson, Daniel Craig
Abstract:: Seven in vitro trials were conducted to compare the effects of soaking annual ryegrass straw in solutions of sodium hydroxide (Na₄OH), potassium hydroxide (KOH), ammonium hydroxide (NH₄OH), or sodium formate (NaCHO₂) at varying levels. Dry matter digestibility (DDM) was the criterion used to measure treatment response. A 3 x 3...
Resource Type:: Dissertation
Full Text:: must also be given to Drs. J. E. Oldfield, P. H. Weswig, D. O. Chilcote and R. A. Schmitt, who

The effect of various additives on nutritive value of ryegrass straw silage

Creator:: Shultz, Thomas Anthony
Abstract:: Observations were made on silage pH, chemical composition and 24hr in vitro dry matter digestion (IVDMD) to evaluate effects of various additives ensiled with annual ryegrass straw. Additives were compared in factorial designed trials utilizing .95 1 glass jar silos. Selection of additives used in each subsequent trial was based...
Resource Type:: Dissertation
Full Text:: graduate committee, Drs. D. C. Church, J. E. Oldfield, W. S. McGuire, and J. A. Harper, for their valued

Selenium effects and species differences in hepatic metabolism of pyrrolizidine alkaloids and other xenobiotics

Creator:: Shull, Lee R.
Abstract:: The metabolism of pyrrolizidine alkaloids and other drugs was studied with regard to nutritional status and species differences. Pyrrolizidine alkaloids which are biotransformed to severely toxic metabolites were isolated from tansy ragwort (Senecio jacobaea). Semi-purified alkaloid crystals containing five alkaloids (senecionine, seneciophylline, jacobine, jacoline, and jacozine) were prepared and found...
Resource Type:: Dissertation
Full Text:: hours after vitamin E supplementation; normal activity is not re- stored after actinomycin D treatment

Computer simulation of beef cattle production systems in the Llanos of Columbia

Creator:: Levine, Joel Martin
Abstract:: A simulation model capable of execution on a programmable calculator was developed to study voluntary intake, liveweight change, and fertility of grade Zebu cows in the Llanos of Colombia. Organic nitrogen in the diet and meta bolic weight were used to predict intake; age, liveweight, and energy concentration were the...
Resource Type:: Dissertation
Full Text:: State University: Drs. A. Ralston, A. G. Nelson, K. Rowe, J. Renden, D. Thomas, and J. E. Oldfield for

Senecio jacobaea : toxicity and effects on mineral metabolism in animals

Creator:: Swick, Robert Alphonso
Abstract:: Several experiments were conducted to examine the toxicity of Senecio jacobaea (SJ) in animals resistant to pyrrolizidine alkaloid (PA) intoxication and to determine the extent of alterations in mineral metabolism as a result of SJ intoxication. Inclusion of SJ into diets containing added copper (Cu) resulted in increased (P<.01) liver...
Resource Type:: Dissertation
Full Text:: EXTENSIVE CYTOPLASMIC VACUOLIZATION, BILIARY HYPERPLASIA AND FIBROSIS (H AND E x80) 31 5 LIVER SECTION

ScholarsArchive@OSU

Vegetation-soil relationships in some Artemisia types in northern Harney and Lake Counties, Oregon

Historical land use and its impact on Oak Creek, Oregon

Vitamin E, selenium and tri-o-cresylphosphate interrelationships

Analysis of two alternative management systems for the production of fall born beef calves in western Oregon

Nutrition and management of the beef unit for production of slaughter animals on range and improved pastures in southeastern Oregon

In vitro and in vivo evaluations of chemically treated ryegrass straw

The effect of various additives on nutritive value of ryegrass straw silage

Selenium effects and species differences in hepatic metabolism of pyrrolizidine alkaloids and other xenobiotics

Computer simulation of beef cattle production systems in the Llanos of Columbia

Senecio jacobaea : toxicity and effects on mineral metabolism in animals

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