SUMMARY—Bombay duck (Harpodon nehereus), a tropical fish, is readily susceptible to drip losses leading to textural alterations. These changes occur during storage at 0 or −20°C for 3 days and also by irradiation and storage at 0 or 10°C for 3 days. In situ denaturation of fibrillar proteins of Bombay duck occurs as evidenced by a decrease in salt‐soluble proteins. Loss in extractability occurring at 0 or −20°C parallels increased drip loss, but appears to be arrested by pre‐dip treatment in 10 sodium tripolyphosphate solution for 15 min. The radiation‐induced drip loss also correlates with loss in the extractability at a radiation dose of 3 Mrad, but at 0.5 Mrad the drip loss occurs without appreciable decrease in the extractability. Pre‐dip treatment in 10 sodium tripolyphosphate solution reduces the drip loss caused by 3 Mrad, but this is not reflected in the recovery of extractable proteins. Loss in the extractability could be attributed to the aggregation phenomenon of fibrillar proteins induced by irradiation. The radiation‐induced off‐odors appear to originate from the s
展开▼
