Trenbolone acetate/estradiol combinations in feedlot steers: dose-response and implant carrier effects
Article Abstract:
The dose-response effects for a trenbolone acetate/estradiol combination implant for use in steers as well as the possible effects of various carriers for the implant were investigated. The use of either cholesterol or lactose as the carrier did not affect the efficacy of the implant, and neither did estradiol level. The highest dosage combination of 140 mg trenbolone with 28 mg estradiol resulted in effects that were better than estradiol alone. Combination-treated cattle had increased longissimus muscle area and decreased carcass marbling score compared to untreated controls, with no difference in carcass quality from estradiol-treated animals.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Effects of a growth hormone-releasing factor analogue and an estradiol-trenbolone actate implant on somatotropin, insulin-like growth factor I, and metabolite profiles in growing Hereford steers
Article Abstract:
Trenbolone-estradiol implatation in steers resulted in higher average daily weight gain than that of controls. The implant did not affect serum levels of somatotropin. The chronic administration of a growth hormone-releasing analogue with or without the implant resulted in similar increases in somatotropin levels. The levels of insulin-like growth factor 1 were also increased, but implanted animals had an attenuated response. Plasma urea nitrogen concentrations were decreased by both the implant and growth hormone-releasing analogue.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Evaluation of sodium thiosulfate as an extracellular water marker in cattle
Article Abstract:
The capacity of sodium thiosulfate (THS) to measure extracellular water (ECW) in relation to empty body water (EBW) estimation by urea space was tested using two groups of steers. One group was used to demarcate the clearance parameters for THS and urea and the other to measure ECW with THS and sodium thiocyanate. Intracellular water and lean body mass can be derived by using markers for EBW and ECW.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
User Contributions:
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