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Effect of different precooking methods on chemical composition and lipid damage of silver carp (Hypophthalmichthys molitrix) muscle

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Summary

The influence of three precooking methods (steaming, oven-baking and microwave-cooking) on the chemical composition and lipid quality of silver carp fillets was evaluated. The changes in protein, fat and moisture were found to be significant for all the treatments (P ≤ 0.05). The iron content in the samples subjected to steam-cooking increased; however, the other precooking methods did not change the mineral contents (P ≥ 0.05). The free fatty acid content of the fillets did not change by the different precooking methods, while thiobarbituric acid (TBA) values increased for oven- and microwave-cooked fillets and remained constant in the steam-cooked samples. Conjugated diene and browning colour formation levels significantly increased in the oven-baked fillets. Oven-baking and microwave-cooking marginally affected the fatty acid composition of the silver carp. On comparing the raw and precooked fillets, steam-cooking was found to be the best precooking method on retaining nutritional constituents.

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