Effect of water-retention agents on Scomberomorus niphonius surimi after repeated freeze–thaw cycles: low-field NMR and MRI studies
Effect of water-retention agents on Scomberomorus niphonius surimi after repeated freeze–thaw cycles: low-field NMR and MRI studies
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DOI：
10.1515/ijfe-2022-0270
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发表时间：
2023-02
影响因子：
1.6
通讯作者：
Shan Sun;Zhuyi Lin;Shasha Cheng;A. M. Abd El-Aty;M. Tan
中科院分区：
文献类型：
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作者：
Shan Sun;Zhuyi Lin;Shasha Cheng;A. M. Abd El-Aty;M. Tan
摘要反复冻融循环可直接引起日本沼虾鱼糜体内水分分布、理化特性和显微结构的变化。为了提高日本鱼糜冻制品的品质，研究了保水剂(磷酸盐和海藻糖)在冻融循环过程中的作用。低场核磁共振(LF-核磁共振)结合核磁共振(MRI)分析结果表明，保水剂能明显降低反复冻融循环过程中的失水量和水的迁移率。保水剂能显著降低蒸煮损失，减少鱼脯蛋白变性，改善鱼脯品质。扫描电子显微镜(SEM)表征表明，保水剂能明显改善蛋白质的结构损伤。此外，主成分分析结合低频核磁共振参数显示，添加不同保水剂的样品具有明显的区分性。综上所述，低频核磁共振和核磁共振成像可以为监测保水剂对反复冻融循环后鱼脯的影响提供有用的信息。
Abstract Repeated freeze–thaw cycles can directly cause the changes in the water distribution, physicochemical characteristics, and microstructure of Scomberomorus niphonius surimi. To improve the quality of S. niphonius surimi, the effect of water retention agents (phosphate and trehalose) was investigated during freeze-thaw cycles. The results of low-field nuclear magnetic resonance (LF-NMR) combined with magnetic resonance imaging (MRI) analysis showed that the water retention agents could obviously decrease the water loss and water mobility during repeated freeze–thaw cycles. Water retention agent significantly reduced the cook loss and improved the surimi quality by decreasing the surimi protein denaturation. The scanning electron microscopy (SEM) characterization revealed that water retention agents could obviously ameliorate the protein structure damage. In addition, the principal component analysis combined with LF-NMR parameters showed clear discrimination between samples supplemented with different water retention agents. In a word, the LF-NMR and MRI might provide useful information in a non-invasive manner for monitoring the effects of water-retention agents on surimi after repeated freeze–thaw cycles.