Department of Food Science and Biotechnology, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City 402, Taiwan, Republic of China.
College of Biotechnology and Bioresources, Da-Yeh University, 168 University Rd., Dacun, Changhua 515, Taiwan, Republic of China.
Food Chem. 2020 Nov 1;329:126989. doi: 10.1016/j.foodchem.2020.126989. Epub 2020 May 6.
In this study, a polyethylene (PE) film coated with chitosan (CS) and gallic acid (GA) was prepared using plasma modification technology and applied for the preservation of tilapia fillets. Based on the analysis of surface morphology and surface functional groups, it was shown that plasma modification allowed CS and GA coating on PE. And GACS/PE demonstrated better antioxidant ability than CS/PE and GA/PE individually. The results of the tilapia freshness test showed that the total plate count showed that GACS/PE can inhibit 1.52 log CFU/g and delay the production of volatile basic nitrogen below 15 mg/100 g after 14 d of storage. Moreover, GA/PE (0.26 mg MDA/kg) and GACS/PE (0.24 mg MDA/kg) showed better thiobarbituric acid inhibitiry effect than control (0.30 mg MDA/kg) on day 14. These results indicate that these packaging films are efficient in extending the shelf life of tilapia fillets.
本研究采用等离子体改性技术制备了壳聚糖（CS）和没食子酸（GA）涂覆的聚乙烯（PE）膜，并将其应用于罗非鱼片的保鲜。通过对表面形貌和表面官能团的分析，表明等离子体改性可以实现 CS 和 GA 在 PE 上的涂层。并且 GACS/PE 比 CS/PE 和 GA/PE 单独使用时具有更好的抗氧化能力。罗非鱼新鲜度测试结果表明，总平板计数表明，GACS/PE 可在 14 天的储存期内抑制 1.52 对数 CFU/g 的生长，并将挥发性盐基氮的产生延迟至低于 15mg/100g。此外，GA/PE（0.26mg MDA/kg）和 GACS/PE（0.24mg MDA/kg）在第 14 天对丙二醛的抑制效果优于对照组（0.30mg MDA/kg）。这些结果表明，这些包装薄膜可以有效地延长罗非鱼片的货架期。
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