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Filtering by: Creator Hyer, Edgar A. Remove constraint Creator: Hyer, Edgar A. Degree Field Animal Science Remove constraint Degree Field: Animal Science

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  • Hypervitaminosis A : effects on reproduction and interactions with pyrrolizidine alkaloids

    Creator:
    Moghaddam, Mehran Fallah
    Abstract:
    In the first experiment the minimum dietary toxic levels of vitamin A were determined in pregnant rabbits over three parities. The treatments consisted of basal diet plus 10,000, 30,000, 60,000, and 90,000 IU/Kg added vitamin A. The basal diet was formulated to be free of vitamin A and beta-carotene; rice...
    Resource Type:
    Masters Thesis
    Full Text:
    Hypervitaminosis A: Effects on Reproduction and

  • Response of feed lot heifers to certain exogenous hormones

    Creator:
    Caster, John Eugene
    Abstract:
    Some effects of hormone treatment on feedlot heifers were studied. The treatments were 15 mg diethylstilbestrol (DES) implant, Synovex H implant, .25 mg oral melengestrol acetate (MGA) per head per day, and .40 mg oral MGA per head per day. One hundred heifers, 20 to each treatment, were used. All...
    Resource Type:
    Masters Thesis
    Full Text:
    BIBLIOGRAPHY Allen, Edgar and A. W. Diddle. 1936. Ovarian follicular hormone effect on the ovaries

  • Cryogenic preservation of ram spermatozoa

    Creator:
    Burkhart, Harry Ray
    Abstract:
    Investigations with ram semen were conducted to develop procedures of cyrogenic preservation that would provide long-term retention of fertilizing capacity in ram spermatozoa. An isotonic extender consisting of egg yolk, sodium citrate, lactose, glycerol, and a broad spectrum antibiotic was selected from among several extenders tested in pilot studies. Using...
    Resource Type:
    Dissertation
    Full Text:
    Redacted for Privacy Abstract approved: ". A. S. Wu Investigations with ram semen were conducted to

  • Evaluation of wet brewers' grain ensiled with low quality forages

    Creator:
    Kennedy, Matthew A. (Matthew August)
    Abstract:
    Two experiments were conducted to evaluate the use of wet brewers' grain (WBG) alone and with straw so it can be used as part of the sole ration for ruminants. In Exp. 1, WBG was ensued alone and was mixed with one of two straws, wheat or tall fescue grass...
    Resource Type:
    Masters Thesis
    Full Text:
    producers compost the straw residue and market it as a soil conditioner (Edgar, 1996). It has been marketed

  • 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:
    Metabolism in Animals AN ABSTRACT OF THE THESIS OF Robert A. Swick for the degree of Doctor of Philosophy

  • Evaluation of perennial ryegrass straw as a forage source for ruminants

    Creator:
    Fisher, Michael J.
    Abstract:
    We conducted two experiments evaluating perennial ryegrass straw as a forage source for ruminants. Experiment 1 evaluated digestion and physiological variables in steers offered perennial ryegrass straw containing increasing levels of lolitrem B. Sixteen ruminally cannulated Angus X Hereford steers (231 ± 2 kg BW) were blocked by weight and...
    Resource Type:
    Masters Thesis
    Full Text:
    as a soil conditioner (Edgar, 1996). Other producers have marketed it as a mulch product to berry

  • Effects of dietary pyrrolizidine alkaloids on copper and vitamin A metabolism in the chicken and Japanese quail

    Creator:
    Huan, Jianya
    Abstract:
    Objectives of this study were to examine effects of dietary pyrrolizidine alkaloids (PA) on copper and vitamin A metabolism in the chicken which are very susceptible to the hepatoxic effects of PA and Japanese quail which are highly resistant to PA. Also, the possible interaction between copper and vitamin A...
    Resource Type:
    Masters Thesis
    Full Text:
    vitamin A metabolism in the chicken and Japanese quail AN ABSTRACT OF THE THESIS OF Jianya Huan for the

  • Influence of dietary factors on tansy ragwort toxicosis in rats and horses

    Creator:
    Garrett, Betsy Jayne
    Abstract:
    Several experiments were conducted to investigate the effect of dietary factors such as amino acids, B vitamins, butylated hydroxyanisole (BHA) and phenobarbital on pyrrolizidine alkaloid toxicosis in rats and horses. The influence of St. John's wort, bracken, comfrey, and alfalfa on tansy ragwort toxicity was also examined. Effects of dietary...
    Resource Type:
    Masters Thesis
    Full Text:
    microsomal enzyme activity, also did not alter susceptibility to PA poisoning. A combination of BHA

  • 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:
    changes occurring with time resulting from a single administration (i.p.) of the alkaloidal preparation

  • Nutritional influences affecting senecio toxicity in laboratory animals

    Creator:
    Buckmaster, Gary Wayne
    Abstract:
    The objective of this research project was to evaluate the toxicity of local pyrrolizidine alkaloid containing plants and to examine the influence of dietary protein, with particular reference to the amino acid cysteine, upon this toxicity. Senecio vulgaris (common groundsel) was shown to be more toxic than Senecio jacobaea (tansy...
    Resource Type:
    Masters Thesis
    Full Text:
    Senecio jacobaea (tansy ragwort). On a dry matter basis, common groundsel contained .206% alkaloid while