Index Catalog // ScholarsArchive@OSU

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:: ) in beef heifers increased from 414 + 84 on day 4 to 2019 + 330 on day 8 and then declined to 589

Cellular mechanisms of altered bovine luteal function in response to exogenous gonadotropin-releasing hormone

Creator:: Bertrand, Jennifer Elaine
Abstract:: To determine whether membrane-related events may be involved in attenuated luteal function after gonadotropin-releasing hormone (GnRH) administration, corpora lutea (CL) were removed from 10 beef heifers on day 7 of the estrous cycle after i.v. injection of GnRH or saline on day 2 of the cycle. Luteal slices were incubated...
Resource Type:: Dissertation
Full Text:: Hormone. Abstract approved: 4----- Fredrick Stormshak To determine whether membrane-related events may

Bovine luteal oxytocin synthesis and secretion in vitro : effects of phorbol ester, calcium ionophore and indomethacin

Creator:: Cosola-Smith, Carrie A.
Abstract:: Experiments were conducted to examine the effects of a tumor-promoting phorbol ester, a calcium ionophore and indomethacin on bovine luteal oxytocin (OT) synthesis and secretion and progesterone secretion. Six 18-month-old crossbred beef heifers in Exp. 1 and five similar heifers in Exp. 2 were observed twice daily for estrus using...
Resource Type:: Masters Thesis
Full Text:: sliced and incubated for 2 h with 0.81nM 12-0-tetradecanoylphorbol 13-acetate (TPA), 1.62 nM TPA, 100p,M

In Vivo and In Vitro effects of a cyclopropenoid fatty acid on progesterone synthesis by the ovine corpus luteum

Creator:: Tumbelaka, Ligaya
Abstract:: Two experiments were conducted to examine the effect of a cyclopropenoid fatty acid on luteal cell function. In Exp. 1, 12 mature ewes were mated to a fertile ram, assigned to two groups (n = 6/group) and laparotomized on day 18 of gestation. Ewes with corpora lutea (CL) in both...
Resource Type:: Masters Thesis
Full Text:: in serum concentrations of P4 within 24 h, after which concentrations of steroid remained low and

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:: consistently below 200 pg/ml, and averaged 5 weeks in length (range: 4-8 weeks) with a mean concentration of

Concerted actions of ovarian steroids and prostaglandin F₂a on smooth muscle contractility of ovine and bovine uterine arteries

Creator:: Ford, Stephen Paul
Abstract:: The role of estradiol- 17β, progesterone and prostaglandin F₂α (PGF₂α) in altering contractility of uterine vascular smooth muscle was investigated. A segment of uterine artery (3. 5 cm) supplying each uterine horn of ewes and heifers were removed at necropsy and perfused with oxygenated Krebs Henseleit Solution prior to initiating...
Resource Type:: Dissertation
Full Text:: ) estradiol- 17(3 (E2, 54 mg implant); 3) pro- gesterone (P4, 15 mg twice daily); and 4) E2 + P4. Treatment

Effect of nutrition on reproductive performance of young female mink

Creator:: Polonen, Ilpo Juhani
Abstract:: Two distinct experiments were conducted. Experiment 1 was conducted to investigate the effects of nutritional conditioning and flushing as a means of improving reproductive performance of female mink. In Exp. 2, vegetable oil and corn syrup were fed during lactation to ascertain whether this nutritional regimen would improve growth of...
Resource Type:: Masters Thesis
Full Text:: Ovaries 3 Sexual Receptivity and Induced Ovulation 4 Delayed Implantation and Length of Gestation 7 Level

Embryonic mortality in pubertal gilts

Creator:: Archibong, Anthony Effanga
Abstract:: An experiment was conducted to compare the reproductive performance and serum concentrations of progesterone and estrogen of mated first (n=18) and third (n=18) estrous gilts slaughtered in equal numbers on days 3, 15 and 30 postmating. Fertilization rate did not differ between mated first and third estrous gilts. Embryonic survival...
Resource Type:: Dissertation
Full Text:: MORTALITY IN PUBERTAL GILTS 4 Serum concentrations of progesterone in recipient gilts on 69 d 3, 12 and 30

Cyclopropenoid fatty acid-induced suppression of ovine corpus luteum function

Creator:: Cortell, Anna Katherine
Resource Type:: Masters Thesis
Full Text:: collected for progesterone (P4) radioimmunoassay 12 h post- surgery and then daily until day 13 of the

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:: Gonadotropin Releasing Hormone 2 Pituitary Hormones 4 Luteinizing Hormone 4 Follicle Stimulating Hormone 7

ScholarsArchive@OSU

Oxytocin synthesis and release by the bovine corpus luteum

Cellular mechanisms of altered bovine luteal function in response to exogenous gonadotropin-releasing hormone

Bovine luteal oxytocin synthesis and secretion in vitro : effects of phorbol ester, calcium ionophore and indomethacin

In Vivo and In Vitro effects of a cyclopropenoid fatty acid on progesterone synthesis by the ovine corpus luteum

Factors affecting prolactin secretion in the African elephant

Concerted actions of ovarian steroids and prostaglandin F₂a on smooth muscle contractility of ovine and bovine uterine arteries

Effect of nutrition on reproductive performance of young female mink

Embryonic mortality in pubertal gilts

Cyclopropenoid fatty acid-induced suppression of ovine corpus luteum function

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

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