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Filtering by: Creator Kelley, Deborah S. Remove constraint Creator: Kelley, Deborah S. Advisor Stormshak, Fredrick Remove constraint Advisor: Stormshak, Fredrick

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  • Photoperiodic effects on serum glucocorticoids and fur growth in mink

    Creator:
    Weiss, Deborah Ellen
    Abstract:
    The relationship of glucocorticoid secretion to light-induced, early-winter priming of pelage in ranch mink was investigated. Sixteen Standard Dark, mature, female mink were exposed to natural light conditions of 45° North latitude beginning on December 13, 1977. A 2x4 cm area of the right hip of each animal was sheared...
    Resource Type:
    Masters Thesis
    Full Text:
    growth in mink AN ABSTRACT OF THE THESIS OF Deborah Ellen Weiss for the degree of Master of Science

  • Factors affecting prolactin secretion in the African elephant

    Creator:
    Bechert, Ursula S.
    Abstract:
    Prolactin (PRL) is a peptide hormone that is involved in a number of diverse physiologic roles, particularly with respect to reproduction, including: influencing sexual and parental behaviors, onset of puberty, regulation of seasonal reproduction, follicular maturation, ovulation, luteinization and corpus luteum (CL) function, steroidogenesis, mammary gland development and lactation, testicular...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE THESIS OF Ursula S. Bechert for the degree of Doctor of Philosophy in Animal

  • Some effects of estradiol on ovine luteal function

    Creator:
    Akbar, Abulfatah Maqsood, 1938-
    Abstract:
    Some effects of 171β-estradiol on ovine luteal function were studied in five experiments. Estradiol injected into ewes on days 11 and 12 of the estrous cycle caused luteal regression in both intact and unilaterally hysterectomized ewes indicating that the presence of one uterine horn permits estradiol to cause luteolysis comparable...
    Resource Type:
    Dissertation
    Full Text:
    (Stormshak, Kelley and Hawk, 1969; Hawk and Bolt, 1970). It is also luteolytic in nonpregnant, pregnant and

  • Pituitary and uterine control of ovarian function in the gilt and ewe

    Creator:
    Chakraborty, Prabir Kumar, 1936-
    Abstract:
    The role of the pituitary gland and uterus in regulating ovarian function in the estradiol-treated gilt and ewe was investigated in two experiments. Pituitary gonadotropin content, ovarian follicular development and corpus luteum function were studied following daily intramuscular injection of seven gilts with 7 mg of 17β-estradiol from day 11...
    Resource Type:
    Dissertation
    Full Text:
    experimental data suggest the existence of steroid sensitive hypothalamic site(s) that control LH release. Van

  • Gonadotropin releasing hormone-induced alteration of corpus luteum function in beef heifers

    Creator:
    Rodger, Lynn Dian
    Abstract:
    Two experiments were conducted to evaluate the effects of gonadotropin releasing hormone (GnRH) on the function of the bovine corpus luteum during the estrous cycle. In Experiment 1, 10 heifers were assigned randomly into two groups with each heifer serving as her own control. Heifers in Group I (n=5) were...
    Resource Type:
    Masters Thesis
    Full Text:
    HEIFERS REVIEW OF LITERATURE Introduction Since the mid 1950's researchers have been actively

  • Some aspects of the mechanism of estrogen action in the uterus of the ewe

    Creator:
    Koligian, Karl Bruce
    Abstract:
    The binding of estrogen to endometrium and uterine arteries of the ewe was investigated by use of a [³H]estradiol exchange assay and by incubating whole tissue aliquants with [³ H]estradiol, a method which permits quantification of bound estrogen translocated from the cytoplasm to the nucleus. Five ewes were necropsied on...
    Resource Type:
    Dissertation
    Full Text:
    . The mechanism(s) whereby estrogen molecules enter 7 the target cell and, in an unaltered state

  • Mechanism of action of exogenous estrogen in the ovine endometrium during the mid-luteal phase of the estrous cycle

    Creator:
    Luebke, Mary Beth
    Resource Type:
    Masters Thesis
    Full Text:
    -(s) by which circulating steroids were able to "recognizel!-,and act on their appropriate target

  • Nongenomic action of progesterone inhibits oxytocin signaling through the ovine oxytocin receptor

    Creator:
    Bishop, Cecily V.
    Abstract:
    Experiments were conducted to characterize the nongenomic effects of progesterone (P4) on binding of oxytocin (OT) to the ovine oxytocin receptor (OTR) and signal transduction. The dose-response relationship of P4 to OT binding to the OTR in endometrium was examined. Progesterone interfered with the binding of OT to the OTR...
    Resource Type:
    Dissertation
    Full Text:
    1950’s it was postulated that steroids acted upon cells via enzymatic action. For example, that the

  • Physiological factors affecting ovine uterine estrogen and progesterone receptor concentrations

    Creator:
    Prater, Patrice L.
    Abstract:
    Two experiments were conducted to determine whether in ewes uterine concentrations of estrogen and progesterone receptors are affected by the presence of a conceptus or by the hormonal milieu associated with extremes in photoperiod to which ewes are exposed. In Exp.1, nine mature ewes were unilaterally ovariectomized by removing an...
    Resource Type:
    Masters Thesis
    Full Text:
    physiological effects of these steroids on the development of the uterus and mammary glands. During the 1960's

  • 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
    Full Text:
    controlling growth, atresia and selection of the ovulatory follicle(s) are not completely understood