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pro vyhledávání: '"Lee M. Sanford"'
Autor:
Susan J. Baker, Lee M. Sanford
Publikováno v:
REPRODUCTION. 139:197-207
Our objective was to test the hypothesis that prolactin (PRL) acts at both the pituitary and testis levels to regulate testosterone secretion in the adult ram. The focus was on the mid-regression to mid-redevelopment stages of a photoperiod-condensed
Publikováno v:
Reproduction. :269-280
The regulation of inhibin secretion has not been elucidated fully in male ruminants. The aim of this study was to determine the relative importance of FSH and testosterone concentrations, and FSH receptors, in the control of secretion of immunoactive
Publikováno v:
Biology of Reproduction. 49:365-373
Relationships between "seasonal" changes in the secretion of gonadotropic (FSH, LH) and gonadal feedback (inhibin, testosterone, estradiol) hormones were examined in the adult ram. Eight Dorset x Leicester x Suffolk rams were kept in photoperiodcontr
Autor:
Bernard Robaire, Lee M. Sanford
Publikováno v:
Canadian Journal of Physiology and Pharmacology. 68:150-156
The effects of season and estradiol on the secretion of gonadotropic hormones in adult Dorset × Leicester × Suffolk rams were studied. Control groups of intact and castrate rams, and castrate rams given estradiol replacement (~ 11.5 pg/mL) via poly
Publikováno v:
Journal of reproductive immunology. 23(2)
Recently developed synthetic Mimetic affinity ligands were screened for their ability to purify estradiol antibody from sheep serum. One of these ligands (color coded Yellow 1) effectively separated immunoglobulin from other serum protein by negative
Autor:
Lee M. Sanford, Susan J. Baker
Publikováno v:
Acta endocrinologica. 122(1)
When the LH signal in the ram is changed from one of large and infrequent pulses to one of small and frequent pulses, the testes quickly become more responsive to LH and testosterone secretion is elevated, perhaps because the number and (or) binding
Autor:
Lee M. Sanford
Publikováno v:
Acta Endocrinologica. 120:180-186
The testes of the ram become more responsive to LH stimulation following immunoneutralization of endogenous estradiol. The possibility that testosterone secretion is facilitated by increased LH-binding activity in the testes was investigated in the p
Autor:
Karl‐Heinz Ponzilius, Lee M. Sanford
Publikováno v:
Journal of andrology. 10(1)
Two experiments were conducted with adult intact rams (approximately 58 kg in body weight) in the nonbreeding season to investigate interrelationships between LH and testosterone secretion. In Experiment 1, LH pulse frequency was increased from appro
Autor:
Lee M. Sanford
Publikováno v:
Canadian journal of physiology and pharmacology. 65(7)
Changes in the dynamics of luteinizing hormone (LH) release in the adult ram following immunoneutralization of endogenous estradiol were investigated. Castrate rams were actively immunized against estradiol-6 – bovine serum albumin for 7 months and