Controlled trial shows tenderizing infusion improves tenderness and muscle fragmentation in lamb carcasses, indicating accelerated postmortem structural breakdown.
Lambs were assigned to 3 treatment groups: control (Ctr), infused with 10% volume (by wt) of a tenderizing blend (NCa), and NCa plus 0.015M CaCl 2 (WCa). Compared to Ctr and WCa, NCa‐treated samples had lower shear force values (P < 0.05) and higher percent change in myofibrillar fragmentation index (P < 0.05). SDS‐PAGE of infused samples revealed the appearance at 24 hr postmortem of 22‐30 kd protein components. Scanning electron micrographs of NCa myofibrils showed they were more fragmented, fractured, or split and had wider interfibrillar spaces compared to Ctr and WCa. The fracture plane of muscles immediately postmortem was along the endomysial‐sarcolemmal sheath, while at 24 hr postmortem the sheath was weakened enough for the fracture to occur along the surface of the myofibrils.
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Farouk et al. (1992) studied this question.
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