title: Effect of zilpaterol hydrochloride supplementation of beef steers and calf-fed Holstein steers on the color stability of top sirloin butt steaks.
abstract: Top sirloin butt steaks were used to determine the effects on color stability of supplementing zilpaterol hydrochloride (ZH) to beef and calf-fed Holstein steers. This study compared the effects of dietary ZH supplementation for 0, 20, 30, or 40 d on feed. One-half of the top sirloin butts were enhanced and packaged in modified-atmosphere packaging (MAP); the remaining one-half were packaged in polyvinylchloride (PVC) film. Beef steaks packaged with PVC from cattle supplemented for 30 d had a tendency (P = 0.07) to produce a redder (a* = 18.31) steak than the control cattle (a* = 17.00) or cattle supplemented for 40 d (a* = 17.05). In beef steaks, ZH had no effect on subjective visual color (P = 0.15 to 0.27) and discoloration (P = 0.10 to 0.59) of steaks packaged with PVC when stratified by day of display, with the exception of visual color on d 5. Beef steaks under MAP from cattle supplemented for 20 d were redder (a* = 19.50, P < 0.05) than those from cattle supplemented for 30 (a* = 18.07) or 40 d (a* = 17.57), but were similar to the control steaks (a* = 18.68). There was no effect (P > 0.05) of retail display day and day of supplementation on objective or subjective color of calf-fed Holstein steaks packaged with PVC. Dietary supplementation for 20 d produced a greater (P < 0.05) b* value on d 1 of display in MAP-packaged steaks from calf-fed Holsteins. If recommending a period of dietary supplementation, 20 to 30 d would be suggested to result in, on average, the brightest, reddest sirloin butt steaks.
authors.affiliation: Department of Animal Science, Oklahoma State University, Stillwater 74078, USA. deb.vanoverbeke@okstate.edu
authors.forename: D L
authors.initials: DL
authors.lastname: VanOverbeke
authors.forename: G G
authors.initials: GG
authors.lastname: Hilton
authors.forename: J
authors.initials: J
authors.lastname: Green
authors.forename: M
authors.initials: M
authors.lastname: Hunt
authors.forename: C
authors.initials: C
authors.lastname: Brooks
authors.forename: J
authors.initials: J
authors.lastname: Killefer
authors.forename: M N
authors.initials: MN
authors.lastname: Streeter
authors.forename: J P
authors.initials: JP
authors.lastname: Hutcheson
authors.forename: W T
authors.initials: WT
authors.lastname: Nichols
authors.forename: D M
authors.initials: DM
authors.lastname: Allen
authors.forename: D A
authors.initials: DA
authors.lastname: Yates
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D003116:Color; D005503:Food Additives / Q000494:pharmacology*; D005511:Food Handling; D008297:Male; D008460:Meat / Q000592:standards; D014297:Trimethylsilyl Compounds / Q000494:pharmacology*
chemical_list: D005503:Food Additives; D014297:Trimethylsilyl Compounds; C475840:Zilpaterol