Effect of post-slaughter processing and freezing on the functionality of hot-boned meat from young bull

The effects of variation in the times of mincing post mortem (2, 4, or 6 h), pre-rigor salting (1.5% wt/wt) and freezing rate [fast (10 min, liquid nitrogen); medium (4-6 h at -40 degrees C and 0.8 m s(-1) air velocity); or slow (36-38 h at -10 degrees C and 0.1 m s(-1) air velocity followed by 12 h at -20 degrees C and 0.1 m s(-1) air velocity)] on the functionality of young bull meat were examined using hot-boned forequarters. At 52 h post packaging, the meat was thawed (72 h at 4 degrees C), its pH measured, and it was used to make finely comminuted batters. Cook yield and stress and strain of the cooked batters were measured. Time of mincing had no effect on meat pH, cook yield or stress and strain. There was a significant interaction (P <0.05) between pre-rigor salting and freezing rate for pH. Freezing rate did not affect the pH of pre-rigor salted meal whereas the pH of unsalted pre-rigor meat was highest at the fastest freezing rate. Meat salted pre-rigor had a significantly (P <0.05) higher pH than the post-rigor chilled control. Pre-rigor salting decreased the stress values of cooked batter whereas the slowest freezing rate increased stress. Stress and strain values for cooked batters from thawed meat were not significantly different from the values for batters made from the unfrozen control. Cook yields of batters made from pre-rigor frozen meat were higher than that of the post-rigor control but not significantly so. The results indicate that suppliers can use pre-rigor salted and frozen meal when manufacturing comminuted products without major detrimental effects on the cook yield and texture of the finished product. Copyright (C) 1996 Elsevier Science Ltd.