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Effects of ractopamine and sex on serum metabolites and skeletal muscle gene expression in finishing steers and heifers

Autor: S. B. Laudert, K. Y. Chung, D. E. Johnson, Dillon K. Walker, Evan C. Titgemeyer, Bradley J. Johnson, T.J. Baxa

Publikováno v: Journal of Animal Science. 88:1349-1357

We evaluated growth-related responses to ractopamine in steers and heifers. Sixteen Angus steers (512 kg) and 16 Angus heifers (473 kg) housed in individual pens were used in a complete block design. At 90 to 97 d before the experiment, steers were i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f8e1a83aae7fc04bd19d288043ce0aa
https://doi.org/10.2527/jas.2009-2409

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Additive effects of a steroidal implant and zilpaterol hydrochloride on feedlot performance, carcass characteristics, and skeletal muscle messenger ribonucleic acid abundance in finishing steers1

Autor: T.J. Baxa, J.C. Brooks, Bradley J. Johnson, D. A. Yates, M. F. Miller, J. P. Hutcheson, M. N. Streeter, Wade Nichols

Publikováno v: Journal of Animal Science. 88:330-337

This experiment investigated the effects of zilpaterol hydrochloride (ZH) and the steroidal implant Revalor-S (RS; 120 mg of trenbolone acetate and 24 mg of estradiol-17beta) on finishing steer performance and the mRNA concentration of beta-adrenergi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c495a172da194b22905b9a8918e81f7
https://doi.org/10.2527/jas.2009-1797

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Effects of duration of zilpaterol hydrochloride and days on the finishing diet on carcass cutability, composition, tenderness, and skeletal muscle gene expression in feedlot steers1

Autor: R. J. Rathmann, D. A. Yates, J.C. Brooks, Bradley J. Johnson, Markus F. Miller, J.M. Mehaffey, Wade Nichols, J. P. Hutcheson, T.J. Baxa

Publikováno v: Journal of Animal Science. 87:3686-3701

Preselected carcasses (n = 112) from feedlot steers fed zilpaterol hydrochloride (ZH; 8.33 mg/kg, DM basis) in a serial slaughter experiment were evaluated to determine the effects of ZH upon carcass cutability, composition, and tenderness. A 4 x 4 f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aaf2ae2129a937192f567446fed1cef3
https://doi.org/10.2527/jas.2009-1818

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Effects of implants of trenbolone acetate, estradiol, or both, on muscle insulin-like growth factor-I, insulin-like growth factor-I receptor, estrogen receptor-α, and androgen receptor messenger ribonucleic acid levels in feedlot steers1

Autor: T.J. Baxa, Bradley J. Johnson, Mary S. Pampusch, Wanda J Weber, K. Y. Chung, Michael E White, S. L. Parr, Marcia Hathaway, William R Dayton

Publikováno v: Journal of Animal Science. 86:3418-3423

We previously showed that a combined trenbolone acetate (TBA)/estradiol-17beta (E2) implant significantly increases IGF-I mRNA levels in the LM of feedlot steers by 28 d after implantation. Here we compare the effects of E2 (25.7 mg), TBA (120 mg), a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b001fd301885f319543836e2e4045732
https://doi.org/10.2527/jas.2008-1085

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Steroid implants and markers of bone turnover in steers

Autor: S.M. Knetter, Bradley J. Johnson, T.J. Baxa, K. Y. Chung, J. E. Minton

Publikováno v: South African Journal of Animal Science; Vol 42, No 3 (2012); 249-255

Steroidal implants are used extensively in beef cattle management to take advantage of welldocumented improvements in growth performance and efficiency. In addition to muscle growth, steroids bring about changes in bone and cartilage formation, haste

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d21379c91a1e3fb1bb59b8cbaba2a2b7
https://www.ajol.info/index.php/sajas/article/view/82031

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Steroid implants and markers of bone turnover in steers

Autor: Knetter, S.M., T.J. Baxa, K.Y. Chung, Johnson, B.J., Minton, J.E.

Publikováno v: South African Journal of Animal Science, Volume: 42, Issue: 3, Pages: 249-255, Published: 2012

Steroidal implants are used extensively in beef cattle management to take advantage of well-documented improvements in growth performance and efficiency. In addition to muscle growth, steroids bring about changes in bone and cartilage formation, hast

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1575::be979e13229d0369c4c6e93a67fcc6a4
http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0375-15892012000300006&lng=en&tlng=en

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