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| Effects of tea polyphenols-chitosan complex solution on changes of quality indicators under storage in Miichthys miiuy |
| NI Jiadan, PAN Shizhe, DAN Fan, JIANG Yihong* |
(College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China)
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Abstract Taken Miichthys miiuy as an experimental material, we investigated the effects of tea polyphenols-chitosan complex solution on changes of main quality indicators (biogenic amine content, volatile base nitrogen content, total bacterial counts) of Miichthys miiuy under 25 ℃ and 4 ℃ storage condition. Tea polyphenols and chitosan were formulated into a complex solution by an orthogonal experiment, and the biogenic amine content was used as an evaluation index to screen out the optimum proportion for inhibiting biogenic amine production. After treatment of the optimum proportion of tea polyphenols-chitosan complex solution, the contents of biogenic amines and volatile base nitrogen, and the total bacterial counts of Miichthys miiuy stored at 25 ℃ and 4 ℃ were determined and analyzed. The results showed that the complex solution of 3 g/L tea polyphenols and 10 g/L chitosan was the optimal proportion, which significantly reduced the content of biogenic amines in Miichthys miiuy under the storage of 25 ℃ for 24 h and 4 ℃ for 12 d, respectively. Moreover, the contents of biogenic amines and volatile base nitrogen, and total colonies in Miichthys miiuy stored at 25 ℃ and 4 ℃ were lower than those of the untreated control group, and their shelf life could be extended to 30-36 h and 12-15 d, respectively.
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Published: 30 October 2018
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茶多酚-壳聚糖复合液对鮸鱼在贮藏中品质指标变化的影响
以鮸鱼为研究对象，分析茶多酚与壳聚糖复合液对鮸鱼在25 ℃和4 ℃贮藏条件下的主要品质指标（生物胺含量、挥发性盐基氮含量、菌落总数）变化的影响。通过正交试验，将茶多酚、壳聚糖配制成复合液，以生物胺含量作为评价指标，筛选出抑制生物胺生成的最佳配比液；在用最佳配比液处理后，检测鮸鱼在25 ℃和4 ℃贮藏条件下的生物胺含量、挥发性盐基氮含量、菌落总数的变化情况。结果表明：复合液的最佳配比为3 g/L 茶多酚与10 g/L 壳聚糖，它可使鮸鱼在25 ℃环境下贮藏24 h 和4 ℃环境下贮藏12 d 后的生物胺含量显著降低；并使在25 ℃和4 ℃贮藏条件下鮸鱼的生物胺含量、挥发性盐基氮含量、菌落总数均低于未经处理的对照组，货架期可分别延长至30～36 h和12～15 d。
关键词：
茶多酚,
壳聚糖,
鮸鱼,
品质,
贮藏
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