Prerigor injection using glycolytic inhibitors in low-quality beef muscles.
The objective of this experiment was to determine the effect of prerigor injection of several glycolytic inhibitors on pH, color, tenderness, and related traits of low-value beef cuts. The semimembranosus, triceps brachii, and supraspinatus muscles from each of 10 steer carcasses were removed 1 h postmortem. Control samples remained in the carcass at 2 degrees C for 24 h. Prerigor muscles were injected and tumbled with 10% (by weight) of one of four solutions: sodium citrate (NaC; 200 mM), sodium fluoride (NaF; 200 mM), sodium acetate (NaA; 200 mM), and calcium chloride (CaCl2; 300 mM). All muscles treated with NaC and NaF showed the highest pH and glycogen content (P < 0.05), indicating that glycolysis was inhibited. Injection of NaC in semimembranosus and supraspinatus produced the tenderest meat (P < 0.05), showing a greater increase in tenderization at 3 d than at 7 d postmortem. Treatment did not affect color or oxidation-reduction potential, but all treated muscles tended to be more oxidative (higher oxidation-reduction potential). Sodium citrate was identified as a potential compound to enhance tenderness of prerigor muscle without altering color. Further studies are required to investigate its effect on palatability traits and to provide a basis for commercial application of the process.
Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA.
N C
NC
Jerez
C R
CR
Calkins
J
J
Velazco
D000704:Analysis of Variance; D000818:Animals; D002122:Calcium Chloride / Q000494:pharmacology*; D002417:Cattle; D002951:Citrates / Q000494:pharmacology*; D003116:Color; D005524:Food Technology / Q000379:methods; D006019:Glycolysis / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D007273:Injections, Intramuscular / Q000662:veterinary; D008297:Male; D008460:Meat / Q000592:standards*; D018482:Muscle, Skeletal / Q000187:drug effects* / Q000378:metabolism; D009243:NAD / Q000378:metabolism; D010084:Oxidation-Reduction; D011180:Postmortem Changes; D011897:Random Allocation; D019346:Sodium Acetate / Q000494:pharmacology*; D000077559:Sodium Citrate; D012969:Sodium Fluoride / Q000494:pharmacology*
D002951:Citrates; D009243:NAD; D000077559:Sodium Citrate; D019346:Sodium Acetate; D012969:Sodium Fluoride; D002122:Calcium Chloride