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Influence of dietary roughage level and Megasphaera elsdenii on feedlot performance and carcass composition of thin cull beef cows fed for a lean market

DeClerck, Jonathan C.; Reeves, Nathan R.; Miller, Mark F.; Johnson, Bradley J.; Ducharme, Gary A.; Rathmann, Ryan J. (2019)

One hundred forty-four cull cows (body condition score = 2.10 ± 0.61; BW = 456 ± 47 kg) were organized into a 2 × 2 factorial design (48 pens, 12 pens/treatment, and 3 cows/pen) to evaluate the effect of dietary roughage ...

Effects of zilpaterol hydrochloride feeding duration and postmortem aging on Warner-Bratzler shear force of three muscles from beef steers and heifers

Brooks, J.C.; Claus, H.C.; Dikeman, M.E.; Shook, J.; Hilton, G.G.; Lawrence, T.E.; Mehaffey, J.M.; Johnson, Bradley J.; Allen, D.M.; Streeter, M.N.; Nichols, W.T.; Hutcheson, J.P.; Yates, D.A.; Miller, M.F. (2009)

To determine the effects of zilpaterol hydrochloride (ZH; 6.8 g/t on 90% DM basis) feeding duration (0, 20, 30, and 40 d) on Warner-Bratzler shear force (WBSF) of longissimus lumborum (LL), triceps brachii (TB), and gluteus ...

Palatability of Beef Strip Loin Steaks Following Variable Length High-Concentrate Diet Exposure Prior to Pasture-Finishing

Milopoulos, Jillian T.; Koch, Brandon M.; Garmyn, Andrea J.; Legako, Jerrad F.; Johnson, Bradley J.; Brooks, J. Chance; Duckett, Susan K.; Miller, Mark F. (2019)

Proximate composition, Warner-Bratzler shear force (WBSF), consumer sensory traits, fatty acid composition, and volatile flavor compounds were assessed on steaks from USDA Select strip loins (n = 40; 8/treatment) representing ...

Effects of a single initial and delayed release implant on arrival compared with a non-coated initial implant and a non-coated terminal implant in heifers fed across various days on feed

Smith, Zachary K.; Holland, Ben P.; Word, Alyssa B.; Crawford, Grant I.; Nichols, Wade N.; Nuttelman, Brandon L.; Streeter, Marshall N.; Hutcheson, John P.; Johnson, Bradley J. (2019)

Two experiments evaluated the effect of implant number, type, and total steroidal dose on live animal performance and carcass traits in heifers fed for three different days on feed (DOF). In experiment 1, heifers (n = ...

Effects of zilpaterol hydrochloride with or without an estrogen-trenbolone acetate terminal implant on carcass traits, retail cutout, tenderness, and muscle fiber diameter in finishing steers

Kellermeier, J.D.; TIttor, A.W.; Brooks, J.C.; Galyean, M.L.; Yates, D.A.; Hutcheson, J.P.; Nichols, W.T.; Streeter, M.N.; Johnson, Bradley J.; Miller, M.F. (2009)

Our objective was to determine the effects of feeding zilpaterol hydrochloride (ZH), a β-agonist, for the final 30 d of the feeding period, with or without a terminal estrogen + trenbolone acetate (TBA) implant (Revalor-S; ...

Zilpaterol hydrochloride alters abundance of β-adrenergic receptors in bovine muscle cells but has little effect on de novo fatty acid biosynthesis in bovine subcutaneous adipose tissue explants

Miller, E.K.; Chung, K.Y.; Hutcheson, J.P.; Yates, D.A.; Smith, S.B.; Johnson, Bradley J. (2012)

We predicted that zilpaterol hydrochloride (ZH), a β-adrenergic receptor (AR) agonist, would depress mRNA and protein abundance of β-AR in bovine satellite cells. We also predicted that ZH would decrease total lipid synthesis ...

Effects of zilpaterol hydrochloride and days on the finishing diet on feedlot performance, carcass characteristics, and tenderness in beef heifers

Rathmann, R.J.; Bernhard, B.C.; Swingle, R.S.; Lawrence, T.E.; Nichols, W.T.; Yates, D.A.; Hutcheson, J.P.; Streeter, M.N.; Brooks, J.C.; Miller, M.F.; Johnson, Bradley J. (2012)

British × Continental heifers (n = 3,382; initial BW = 307 kg) were serially slaughtered to determine if increasing days on the finishing diet (DOF) mitigates negative consequences of zilpaterol HCl (ZH) on quality grade ...

Moisture enhancement and blade tenderization effects on the shear force and palatability of strip loin steaks from beef cattle fed zilpaterol hydrochloride

Brooks, J.C.; Mehaffey, J.M.; Collins, J.A.; Rogers, H.R.; Legako, J.; Johnson, Bradley J.; Lawrence, T.; Allen, D.M.; Streeter, M.N.; Nichols, W.T.; Hutcheson, J.P.; Yates, D.A.; Miller, M.F. (2010)

Two trials investigated zilpaterol hydrochloride (ZH) feeding duration, enhancement, blade tenderization, and postmortem aging effect on Warner-Bratzler shear force (WBSF; trial 1) and consumer sensory ratings (trial 2). ...

Ractopamine Hydrochloride and Estradiol + Trenbolone Acetate Implants Alter Myogenic mRNA, β-Adrenergic Receptors, and Blood Metabolites

Harris, T.L.; Smith, Zachary K.; Ribeiro, Flavio R.B.; Jennings, M.A.; Vogel, G.J.; Johnson, Bradley J. (2020)

Two commonly used growth promotants in the United States beef industry are β-agonists and anabolic steroid hormones. Each has been shown to increase lean muscle deposition in cattle provided treatments of each growth ...

Evaluation of coated steroidal implants containing trenbolone acetate and estradiol-17β on live performance, carcass traits, and sera metabolites in finishing steers

Smith, Zachary K.; Thompson, Alex J.; Hutcheson, John P.; Nichols, Wade T.; Johnson, Bradley J. (2018)

Crossbred beef steers (n = 240; 12 pens/treatment; initial BW = 305 ± 17.7 kg) were used in a randomized block design feedlot study to evaluate the influence of coated trenbolone acetate (TBA) and estradiol-17β (E2) implants ...

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