摘要
利用静电场结合冰温技术对凡纳滨对虾进行保鲜,通过不同静电场处理,测定凡纳滨对虾贮藏期间多酚氧化酶(PPO)相对酶活、白度值、感官评分、菌落总数、挥发性盐基氮、pH值、汁液流失率、K值和流变学特性的变化,研究不同静电场(1.5,2.5,3.5kV)结合冰温[(-1±1)℃]技术对凡纳滨对虾的保鲜效果。结果表明:冰温条件下,静电场处理的凡纳滨对虾的PPO酶活有所抑制,感官色泽等指标明显优于单纯冰温样品。贮藏后期,虾肉中菌落总数因电场的作用得到抑制,TVB-N值与K值都有不同程度的减缓,虾肉的汁液流失率在贮藏后期也保持在较低水平。通过流变学特性的测试,发现静电场对延缓虾肉软化也有一定的效果。总体上,2.5kV静电场保鲜效果较优,可延长凡纳滨对虾保质期至8d。
Used the electrostatic field combined with controlled freezing-point storage technology to preserve the Litopenaeus vannamei,and examined the effects of different electrostatic field(1.5,2.5,3.5kV)combined with controlled freezing-point storage(-1 ℃±1℃)on quality of Litopenaeus vannamei.Some quality index changes were compared in Polyphenol Oxidase(PPO)relative enzyme activity,whiteness,sensory,total bacterial counts,TVBN,pH,drip loss,K value and rheology property.The results showed that electrostatic field inhibited the PPO relative enzyme activity,the sensory and whiteness significantly better than the controlled freezing-point storage.In the late period of storage,the total bacterial counts was inhibited by electrostatic field and TVB-N,K value was all slowed down to different degrees.The drip loss rate remained at a low level.Electrostatic field can significantly delayed muscle protein degradation through the test of rheological properties.In general,the 2.5kV electrostatic field has a better preservation effect,which can extend the shelf life of the Litopenaeus vannamei to 8days.
作者
段伟文
全沁果
章雪琴
张泽伟
陈铭
曾雪鸽
刘书成
吉宏武
DUAN Wei-wen;QUAN Qin-guo;ZHANG Xue-qin;ZHANG Ze-wei;CHEN Ming;ZENG Xue-ge;LIU Shu-cheng;JI Hong-wu(College of Food Science and Technology , Guangdong Ocean University , Zhanjiang ,Guangdong 524088, China;Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution , Zhanjiang, Guangdong 524088,China;Guangdong Provincial Seafood Engineering Technology Research Certer, Zhanjiang, Guangdong 524088, china;Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety , Zhanjiang , Guangdong 524088, China)
出处
《食品与机械》
CSCD
北大核心
2018年第12期101-107,共7页
Food and Machinery
基金
国家虾蟹产业技术体系建设(编号:CARS-48)
关键词
凡纳滨对虾
保鲜
静电场
冰温
Litopenaeus vannamei
preservation
electrostatic field
controlled freezing-point storage
