食品科学2026，Vol.47Issue(10)：249-257,9.DOI:10.7506/spkx1002-6630-20251226-220
脉冲磁场提升速冻米制品品质的机理:基于淀粉凝胶结构调控与冻融稳定性的研究
Mechanism of Action of Pulsed Magnetic Field in Improving the Quality of Quick-Frozen Rice Products:A Study Based on Starch Gel Structure Regulation and Freeze-Thaw Stability
摘要
Abstract
This study focuses on the effects of pulsed magnetic field(PMF)on the structure and properties of starch gels subjected to rapid freezing at-40℃.The results showed that during freeze-thaw cycles,the formation of large ice crystals promoted the cross-linking of starch molecules,leading to the development of more double-helix structures in both amylose and amylopectin,and causing damage to the gel network,specifically manifested as network fragmentation and the formation of porous wall structures.Repeated freeze-thaw cycles further intensified the intercellular interactions and structural damage of starch.By shortening the phase transition time,PMF-assisted freezing treatment promoted the formation of small ice crystals and mitigated the squeezing and piercing effects of ice crystals on the gel structure.Additionally,it regulated starch network reorganization,inhibited the formation of amylose and amylopectin double helix structures,reduced structural order,alleviated gel network damage,and promoted the formation of a uniform three-dimensional network,ultimately significantly improving the freeze-thaw stability of gels.Compared with the sample subjected to one freeze-thaw cycle at 0 mT(0FT-1),applying magnetic field intensities of 5 and 10 mT reduced gel hardness by 12.81%and 33.95%,respectively.Furthermore,PMF clearly preserved the structure and quality of gels subjected to multiple freeze-thaw cycles.Compared with the sample subjected to two freeze-thaw cycles at 0 mT(0FT-2),applying magnetic field at 5 and 10 mT reduced gel hardness by 5.97%and 29.35%,respectively,effectively mitigating the decline in textural quality of starch gels caused by temperature fluctuations.This study provides a theoretical basis for the application of PMF in quick-frozen rice products and offers a feasible approach to enhancing the storage stability of such foods.关键词
淀粉凝胶/速冻/多尺度结构/非线性流变特性/质构品质Key words
starch gels/rapid freezing/multi-scale structure/nonlinear rheological properties/textural quality分类
轻工纺织引用本文复制引用
王静,谌荟琳,聂萌滋,陕怡萌,佟立涛..脉冲磁场提升速冻米制品品质的机理:基于淀粉凝胶结构调控与冻融稳定性的研究[J].食品科学,2026,47(10):249-257,9.基金项目
"十四五"国家重点研发计划重点专项(2024YFE0111500) （2024YFE0111500）
成都国家农业科技中心地方财政专项基金项目(NASC2024KY28) （NASC2024KY28）
中国农业科学院中原研究中心重点任务项目(ZYZX2023010108) （ZYZX2023010108）
