As a very important group of proteins in muscle, myofibrillar proteins can directly affect the quality of meat products. However, myofibrillar proteins are prone to oxidation during processing and storage, which leads to a series of adverse consequences, such as amino acid side chain modification, protein cross-linking, aggregation and functional alterations. Polyphenols, potent natural antioxidants, can effectively inhibit the oxidation of myofibrillar proteins by interacting with them, while affecting their structure, function and nutritional properties. In this article, we summarize the mechanism of the free radical chain reaction involved in myofibrillar protein oxidation, the structure-activity relationship of polyphenols as an antioxidant against myofibrillar protein oxidation, the mechanisms of the covalent and non-covalent interactions between polyphenols and myofibrillar proteins, and the effects of the interactions on the structure and properties of myofibrillar proteins. Through this review, we hope to provide theoretical guidance for the application of polyphenols in meat product preservation.

The effects of vacuum-assisted high pressure curing on the histological structure and sensory and physicochemical quality of grass carp pieces were studied. Fish pieces cured at normal pressure (control) or at high pressures (0, 2.3, 4.6 and 6.9 kPa) in vacuum were evaluated for salt content, histological structure and total volatile basic nitrogen (TVB-N) content, water content and water distribution. Results indicated that during curing, salt gradually penetrated into fish tissue, and vacuum curing resulted in a decreased yield of the fish product, an increase in shear force, hardness, resilience and viscosity, a decrease in thiobarbituric acid reactive substance (TBARs) value, water content and centrifugal loss, and an increase in the intercellular spaces. After vacuum-assisted high pressure curing treatment, the salt content was increased, the product yield was decreased, and the whiteness was increased. The fish cured at 6.9 kPa had the lowest shear force, hardness, cohesiveness, elasticity, and viscosity, but the TVB-N content was not significantly changed, and the juice loss rate was increased. In conclusion, vacuum-assisted high pressure curing can improve the quality of cured fish, and slow down the spoilage rate.