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Showing 1 to 15 of 15 for “"Somatotropin"”.
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Effect of nutrient intake on pigs treated with porcine somatotropin
An experiment was conducted to develop a technique for hyperalimentation of growing swine and to evaluate the effect of hyperalimentation on feedlot performance and carcass criteria. To allow for infusion of feed into the stomach, a cannula was implanted. The implantation of a cannula into the …
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Lactational Evaluation of Recombinant Bovine Somatotropin with Corn and Barley Diets
… 20.6, and 30.9 mg/hd/d of recombinant bovine somatotropin injected wk 15 through 44 postpartum. Forage dry matter was 80% corn silage and 20% alfalfa hay. Forage to concentrate ratio in total mixed diets varied from 50:50 to 70:30 with milk production. For the entire lactation, milk production …
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Interactions of Bovine Somatotropin and Nutrition on Milk Production and Composition of Dairy Cows
… arrangement to study interactions of bovine somatotropin (bST) and nutrition during weeks 5 through 20 postpartum. Main effects were bST (-or+ 10.3 mg per day) and diet (control, C; or high protein and energy, HPE). Diet C was formulated to contain 16.3% crude protein and 1.65 Meal net energy …
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Regulation of beef heifer productivity by dietary energy and prepubertal administration of bovine somatotropin
Weanling heifer calves (n = 452) grazed tall fescue pastures and were fed a high (H) or low (L) amount of corn supplement during a postweaning treatment period of 136 d. Postweaning gain of heifers receiving L and H was.43 and.62 kg/d, respectively. Heifers receiving H were heavier, and had more …
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The Role of Exogenous Somatotropin, Ovariectomy and Extracellular Matrix in Bovine Mammary Gland Development
The highly regulated maturation of the mammary gland is poorly understood. Our studies were designed to further characterize the role of ovarian hormones, growth hormone (GH)/IGF axis proteins and extracellular matrix (ECM) in the growth and development of prepubertal mammary glands. Prepubertal …
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Reproductive performance of Holstein cows treated with prostaglandin F2a, gonadotropin releasing hormone, and recombinant bovine Somatotropin
… of presynchronization and recombinant bovine somatotropin (rbST) on conception rates following a timed insemination (TAI) protocol in lactating dairy cows. A further objective included the evaluation of the efficacy of the Early Conception Factor (ECF) test kit. Recombinant bST may offer some …
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Composition and Flavor of Milk and Butter from Cows Fed Unsaturated Dietary Fat and Receiving Bovine Somatotropin
… (Wrenn et al., 1976). Administration of bovine somatotropin increased milk yield, while having a negligible effect on milk composition (Baer et al., 1989; Eppard et al., 1985a; Kindstedt et al., 1991). Baer et al. (1989) and Eppard et al. (1985a) observed an increase in the unsaturated fatty …
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Nutritional and endocrine aspects of the lactation cycle of Holstein and Jersey cows: nutrient balances, response to supplemental dietary fat, rib composition and rib histology
… the stress of calving. Jerseys had higher plasma somatotropin on day after calving, but Holsteins had higher glucose on day of and day after calving. Plasma parathyroid hormone did not differ between breeds, but Jerseys had higher 1,25-dihydroxyvitamin D₃ than Holsteins on both days after calving. …
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The Role of Insulin-like Growth Factor-I and IGF-binding Proteins in Mammary Gland Development
… the growth response to mammary tissue extracts. Somatotropin increased the mitogenic response to mammary extracts at high feeding level and increased the tissue content of IGF-I by 46%. In summary, local synthesis of IGF-I and IGFBP is influenced by feeding level and exogenous somatotropin and …
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Viral delivery of recombinant growth hormone to rescue effects of chronic stress on hippocampal learning
… be downregulated in HIP in response to stress is somatotropin, colloquially known as growth hormone (GH). These experiments were conducted to develop a novel assay for examination of working memory in rats and explore the nature of stress-induced impairment of hippocampal function and determine …
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Ovarian and Growth Hormone Regulation of Mammary Growth and Transcript Abundance in Prepubertal Dairy Heifers
… gland by ovarian secretions and exogenous bovine somatotropin (bST). In the first study, we determined the effect of staged ovariectomy on mammary growth and development in two to four month old Holstein heifers. In the second study, effects of bST on mammary growth and development, and also on …
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The Physiology of Enhanced Milk Yield Through Increased Milking Frequency in Early Lactation
… IMF that increase MY by comparing it to bovine somatotropin (bST). Cows that underwent early lactation IMF received bST at 80 DIM. Both IMF and bST treatments significantly enhanced MY, but there was no interaction or synergistic effect between treatments. We surmised that IMF and bST cause …
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The in vitro and in vivo lipolytic activity of two porcine growth hormone preparations in pigs
Thesis (M.S.)--Michigan State University. Dept. of Food Science and Human Nutrition, 1975
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Characteristics of Milk and Reduced Fat Cheddar Cheese from Cows Fed Extruded Soybeans and Niacin
… of lactation, and use of recombinant bovine somatotropin. It has been found that feeding cows supplemental fat increases the concentration of unsaturated fatty acids in milk fat (Grummer, 1991). While this may be appealing to the consumer there are still some potential problems which should …
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Influência da somatotropina recombinante bovina (rbST) aplicada em receptoras de embriões bovinos, no dia do estro, sobre variáveis reprodutivas
… no dia do estro, de 500 mg de rbST (somatotropina bovina recombinante) em receptoras inovuladas com embriões transferidos à fresco e de 250 e 500 mg de rbST em receptoras inovuladas com embriões descongelados, sobre a concentração sérica de progesterona (P4) no dia da inovulação e a …