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Influence of high pre-rigor temperature and fast pH fall on muscle proteins and meat quality: a review
- Kim, Yuan H. Brad, Warner, Robyn D., Rosenvold, Katja
- Animal production science 2014 v.54 no.4 pp. 375-395
- beef, cooling, denaturation, electrical treatment, glycolysis, hot boning, meat quality, muscle protein, muscles, pH, pork, poultry, proteins, slaughter, swine, temperature, venison
- The impacts of accelerated pH decline combined with high muscle temperature on post-mortem muscle metabolism and subsequent meat quality attributes have been extensively studied. Traditionally, this phenomenon has been observed in pork muscles, primarily due to the relatively fast post-mortem glycolysis rate and its relationships to stress susceptibility of pigs before slaughter. However, the protein-denaturing condition of high temperature/rapid pH fall and subsequent PSE (pale, soft and exudative)-like abnormal meat quality characteristics have been observed in muscles from other species such as beef, lamb, venison and even poultry. Various pre-rigor conditions including the application of electrical stimulation, hot-boning, and/or pre-rigor carcass chilling temperatures in various muscles, in conjunction with carcass stretching/hanging methods, can also contribute to muscle-protein denaturation pre-rigor. This review considers the influence of a faster than normal pH fall at a higher than normal pre-rigor temperature on glycolysis, post-mortem muscle proteins and subsequently meat quality attributes. Gaps in current knowledge are identified and recommendations made for additional research.