Effect of static magnetic field-assisted freezing at different temperatures on the structural and functional properties of pacific white shrimp (Litopenaeus vannamei) myofibrillar protein

IF 9.8 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2025-01-10 DOI:10.1016/j.foodchem.2025.142836

Qihang Wei, Qinxiu Sun, Qian Hou, Ouyang Zheng, Naiyong Xiao, Shucheng Liu

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Abstract

The effects of static magnetic field-assisted freezing (MF) on the structural and functional characteristics of Litopenaeus vannamei myofibrillar protein (MP) at various temperatures (−35 ~ −20 °C) were examined to assess its influence on MP and its energy-saving potential. The results indicated that −35 °C MF (MF-35) exhibited greater solubility and lower turbidity than −35 °C immersion freezing (IF-35), suggesting that MF-35 inhibited MP aggregation. MF-35 prevented the reduction in fluorescence intensity and α-helix content, protecting the MP tertiary and secondary structures. The emulsifying stability and gel strength of MF-35 surpassed those of the other frozen samples, indicating that MF-35 was the most efficient at mitigating the degradation of MP emulsifying and gel properties generated by freezing. No significant differences in solubility, surface hydrophobicity, emulsifying activity, and gel strength were detected between IF-35 and MF-25 (P > 0.05). In conclusion, MF impeded the denaturation of MP and exhibited energy-saving potential.

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不同温度下静磁场辅助冷冻对凡纳滨对虾肌原纤维蛋白结构和功能特性的影响

研究了不同温度（- 35 ~ - 20 °C）下静磁场辅助冷冻（MF）对凡纳滨对虾（Litopenaeus vannamei）肌原纤维蛋白（MP）结构和功能特性的影响，以评估其对MP的影响及其节能潜力。结果表明，-35 °C的MF （MF-35）比-35 °C浸泡冷冻（IF-35）具有更高的溶解度和更低的浊度，这表明MF-35抑制了MP的聚集。MF-35阻止了荧光强度和α-螺旋含量的降低，保护了MP的三级和二级结构。MF-35的乳化稳定性和凝胶强度优于其他冷冻样品，表明MF-35对MP的乳化和凝胶性能的降解是最有效的。IF-35和MF-25在溶解度、表面疏水性、乳化活性和凝胶强度方面均无显著差异（P >； 0.05）。综上所述，MF抑制了MP的变性，具有节能潜力。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.