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Histamine formation and the freshness of yellowfin tuna (Thunnus albacares) stored at different temperatures

机译:在不同温度下储存的组胺的形成和黄鳍金枪鱼(Thunnus albacares)的新鲜度

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This study was conducted to investigate the effect of storage temperatures on the shelf life of yellowfin tuna (YFT) loins by studying of microbial, chemical and organoleptic changes. Shelf life of YFT was determined through changes in total aerobic bacterial plate counts (APC), total volatile basic nitrogen (TVB-N) trimethylamine (TMA), organoleptic properties and histamine development during storage at 0, 4 and 7°C. Based on TVB-N value indices, YFT maintained an acceptable shelf life for 21, 17 and 12?days at 0, 4 and 7°C, respectively. Nevertheless, YFT was rejected earlier by the sensory panellists than their TVB-N value indicated. Histamine development was found to be lower than the European Union safety level for 100?mg/kg fish during storage at 0 and 7°C for 21 and 17?days, respectively. Aerobic bacteria initially dominated the micro-flora on YFT; however, as storage time increased, aerobic bacteria became dominant at cold storage, but the numbers exceeded the International Commission on Microbiological Specifications for Foods (ICMSF) limit of 10~(7)?cfu/g in storage at 7°C after 17?days. Therefore, it can be concluded that the storage of fresh YFT in below 4°C has good enough to the shelf life of products (two weeks).
机译:这项研究是通过研究微生物,化学和感官变化来研究贮藏温度对黄鳍金枪鱼(YFT)腰肉货架期的影响。 YFT的保质期是通过在0、4和7°C下储存期间总需氧菌板数(APC),总挥发性碱性氮(TVB-N)三甲胺(TMA),感官特性和组胺形成的变化来确定的。根据TVB-N值指数,YFT分别在0、4和7°C下保持21、17和12天的可接受的货架寿命。但是,YFT被感官小组成员拒绝的时间早于其TVB-N值。发现在0和7°C下分别存放21天和17天的过程中,组胺的产生低于100 mg / kg鱼的欧盟安全水平。最初,好氧细菌在YFT的微生物区系中占主导地位。但是,随着贮藏时间的增加,需氧菌在冷藏中占主导地位,但数量超过了国际食品微生物学委员会(ICMSF)规定的在17°C后在7°C下贮藏10〜(7)?cfu / g的限值。天。因此,可以得出结论,新鲜的YFT在4°C以下的储存足以满足产品的保存期限(两周)。

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