Effect of Arginine Combined with Chitosan on Quality of Postmortem Yak Meat during Maturing

Abstract

In order to clarify the synergistic effect of different concentrations of arginine and different concentrations of chitosan on the quality of yak meat during postmortem aging and its potential mechanism, in this study, different concentrations of arginine and different concentrations of chitosan were injected into yak meat to determine their effects on the quality of yak meat during postmortem aging. The results showed that the combination of 0.4%~0.8% arginine and 1.0% chitosan could significantly increase the pH value, reduce the L*, b* values, metmyoglobin and cooking loss of yak meat during postmortem aging, and increase a* value and oxymyoglobin (P0.05). Histological observation showed that the compound treatment was more conducive to the integrity and fullness of muscle cells, and reduced the water channel. In summary, the combination of different concentrations of arginine and different concentrations of chitosan improved the quality of postmortem yak meat during aging to a certain extent, improved its meat color stability and reduced cooking loss, promoted tenderization, and made muscle cells more complete and fuller, but it promoted fat oxidation and protein oxidation as a whole. The specific reasons and related mechanisms need to be further explored.

Keywords

• yak meat
• arginine
• chitosan
• postmortem ageing
• quality
• oxidation