延迟加冰对冰藏大黄鱼品质变化的影响  

Effect of Delayed Ice Exposure on the Quality Changes of Pseudosciaena crocea during Ice Storage

作　　者：姜兴为[1,2] 许钟[2] 杨宪时[1] 郭全友[1] 李学英[1] 

机构地区：[1]中国水产科学研究院东海水产研究所,上海200090 [2]上海海洋大学食品学院,上海201306

出　　处：《食品科学》2011年第2期270-274,共5页Food Science

基　　金：国家自然科学基金项目(30771675);科技部农业科技成果转化资金项目(2007GB23260281);科技部中央级公益性科研院所基本科研业务费专项(2007M05)

摘　　要：通过微生物、化学和感官指标,以立即加冰为对照研究在25℃环境中延迟4h和8h后加冰对养殖大黄鱼(Pseudosciaena crocea)冰藏期间品质变化和货架期的影响。结果表明在延迟加冰阶段菌落总数(TVC)、嗜冷菌数、假单胞菌数、产硫化氢细菌数和总挥发性盐基氮(TVB-N)显著增加;感官品质显著降低;三甲胺氮(TMA-N)变化不明显。延迟加冰可显著增加大黄鱼冰藏期间各种微生物的数量,加快TMA-N和TVB-N的产生速率,显著缩短冰藏大黄鱼的货架期和产生异味的时间。感官评价显示立即加冰和延迟4h与8h加冰大黄鱼的货架期分别为648、550h和408h,立即加冰比延迟加冰货架期分别延长98h和240h,鲜鱼捕获后立即进行加冰处理是相当必要的。Living Pseudosciaena crocea was sacrificed,and then ice-stored immediately（as a control）or after 4 or 8 h delay in 25℃environment,and the microbial,chemical and sensory parameters of Pseudosciaena crocea during 800 h of ice storage were periodically measured in order to assess the effect of delayed ice exposure on the quality changes of Pseudosciaena crocea during ice storage.In comparison with the control,delayed ice exposure led to significant increases in the counts of total viable bacteria（TVC）,Psychrobacter spp.,Pseudomonas spp.and H2S-producing bacteria as well as total volatile basic nitrogen（TVB-N）content,and a significant decrease in the sensory quality,but no significant change in rimethylamine nitrogen（TMA-N）throughout the period of storage.These findings reveal that delayed ice exposure is able to significantly promote the growth of various microbes during ice storage,accelerate the generation rates of TVB-N and TMA-N and the production of off-odor,and substantially shorten the shelf life of Pseudosciaena crocea.According to the sensory evaluation results given by 5 trained panelists,the shelf lives of ice-stored Pseudosciaena crocea after 0,4 h and 8 h delay were 648,550 h and 408 h,respectively.Therefore,immediate ice exposure prolongs the shelf life of Pseudosciaena crocea by 98 h and 240 h when compared to 4 and 8 h delay,respectively.

关 键 词：大黄鱼 延迟加冰 货架期 品质变化 

分 类 号：S984.1[农业科学—捕捞与储运]