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Cai, Wen‐qiang; Wei, Jian‐ling; Chen, Yue‐wen; Dong, Xiu‐ping; Zhang, Jing‐na; Bai, Fan; Zheng, Li‐li; Shi, Yu‐gang
Journal of the science of food and agriculture, September 2020, 2020-Sep, 2020-09-00, 20200901, Volume: 100, Issue: 12Journal Article
BACKGROUND Sturgeon is popular for its nutritious value and its taste. However, sturgeon fillets are traditionally heated in 100 °C boiling water, resulting in unfavorable taste and with a negative effect on the quality. This study considered the effect of combinations of vacuum and low‐temperature treatments (LTVH groups) on sturgeon fillets compared with the traditional heat treatment (TC groups). RESULTS The results show that the LTVH groups had lower cooking‐loss rates. All LTVH fillets were changed to a white color, and appeared ‘done’, as did the TC fillets. The LTVH and TC methods gave rise to significant differences in texture: the springiness of the LTVH groups decreased with heating time, and decreased rapidly in the TC groups (P < 0.05); hardness and chewiness increased with time and temperature in the LTVH groups, but decreased in the TC groups. More compact and denser gaps were observed in LTVH70 groups and TC groups. Less protein and lipid oxidation was evident in LTVH groups, including more myofibril protein solubility; there was less protein aggregation, fewer thiobarbituric acid reactive substance, and Schiff base. CONCLUSION Vacuum and low‐temperature treated sturgeon fillets can be served as a good alternative. This treatment caused slight tissue damage and less proteolysis and lipid oxidation, which is beneficial for the quality of aquatic products.
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