静磁场辅助超冰温对猪肉贮藏品质和保水性的影响  

Effects of Static Magnetic Field-assisted Supercooling Preservation on Quality and Water-holding Capacity of Pork during Storage

作　　者：何兴兴 魏茹慧 刘承灏 钟经纬 李静 关文强[1] HE Xingxing;WEI Ruhui;LIU Chenghao;ZHONG Jingwei;LI Jing;GUAN Wenqiang(Tianjin Key Laboratory of Food Biotechnology,College of Biotechnology and Food Science,Tianjin University of Commerce,Tianjin 300134,China)

机构地区：[1]天津商业大学生物技术与食品科学学院,天津市食品生物技术重点实验室,天津300134

出　　处：《食品工业科技》2024年第24期311-318,共8页Science and Technology of Food Industry

基　　金：大学生创新训练计划项目(JDG22022)。

摘　　要：超冰温可以使猪肉不发生冻害,但维持超冰温状态是困难的。本文提出了一种创新的静态磁场辅助超冰温(Static Magnetic Field Extended Supercooling, SMF-ES)方法来保持猪肉的非冷冻状态。研究了SMF-ES(-3.5℃+SMF)与冷藏(4℃)、微冻(-3.5℃)和冷冻(-18℃)处理对猪肉品质和保水性的影响。结果表明,8 mT的静磁场强度可有效将猪肉在-3.5℃下无冰核保存12 d,防止了猪肉在超冰温-3.5℃下发生冻害。与冷藏、微冻和冷冻处理相比,SMF-ES组中猪肉的汁液损失率分别降低了21.10%、59.81%及30.64%,且SMF-ES组中猪肉的色泽、嫩度、离心损失、肌原纤维蛋白溶解度和表面疏水性指标是最优的。与冷藏处理和微冻处理相比,SMF-ES处理组的pH、脂质氧化程度和菌落总数在贮藏期变化最为缓慢。综上,SMF-ES处理组的猪肉整体可接受性最佳,表明磁场辅助超冰温处理有效地维持了冰鲜猪肉的品质和保水性。Supercooling can preserve pork without freezing damage.However,maintaining a supercooled state was difficult.An innovative static magnetic field extended supercooling(SMF-ES)method was proposed to maintain the non-frozen state of pork.Effects of SMF-ES(-3.5℃+SMF)compared with refrigerated(4℃),slight-frozen(-3.5℃)and frozen(-18℃)treatments on pork quality and water-holding capacity were investigated.Results showed that an 8 mT static magnetic field successfully preserved pork at-3.5℃without ice nucleation for 12 d,which prevented freezing damage to pork.Compared with the refrigerated,slow-frozen,and frozen treatments,the drip loss of SMF-ES decreased by 21.10%,59.81%and 30.64%,respectively.The color,tenderness,centrifugation loss,myofibrillar protein solubility,and surface hydrophobicity of pork in the SMF-ES group were better than those in the refrigerated,slow-frozen,and frozen treatments.In addition,the SMF-ES group was superior to the refrigerated and slow-frozen groups in terms of pH,lipid oxidation degree,and aerobic plate count.In conclusion,the overall acceptability of pork after SMF-ES treatment was the best,indicating that SMF-ES treatment could effectively maintain the quality and water-holding capacity of chilled pork.

关 键 词：猪肉 静磁场 超冰温 保鲜 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]