Salt-induced swelling is a crucial phenomenon in pork meat processing, significantly influencing the meat's water-holding capacity (WHC). Existing theories focus on the role of myofibrillar proteins, especially myosin and actin, in swelling. However, the involvement of soluble proteins, such as sarcoplasmic proteins in salt swelling remains unclear. Thus, elucidating the role of these soluble proteins has practical implications for improving processing and enhancing pork quality.
This study utilized multiple changes of fresh saline to analyze the effect on weight gain of blocks of porcine longissimus muscle while enclosing the blocks in dialysis tubing or suspending them in an excess of 3% NaCl solution alone to compare swelling.efflux to saline yielded protein concentrations that exceeded the anticipated levels from solely sarcoplasmic proteins, suggesting that there was some partial solubilization of myofibrillar proteins in these treatments.
The results also showed that daily saline exchanges increased the weight gain of the meat blocks, possibly attributed to stabilization of the ionic concentration in the soluble or to the excretion of soluble protein. The dialysis membrane reduced protein efflux and attenuated meat swelling compared to meat in free solution.
These findings not only redefine our understanding of meat swelling dynamics, but also pave the way for optimized meat processing technologies, which will enhance the quality of meat products worldwide.Peter P. Purslow et al, The extraction of soluble proteins aids salt swelling of pork meat,
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