壳聚糖-三七叶黄酮复合保鲜剂对冷鲜黄牛肉的保鲜效果

目的：研究壳聚糖-三七叶黄酮复合保鲜剂对冷鲜黄牛肉的保鲜效果。方法：通过抗氧化及抑菌实验确定复合保鲜剂的最佳配比，并通过贮藏实验分析该复合保鲜剂对冷鲜（（4±2）℃）黄牛肉的保鲜效果。结果：壳聚糖与三七叶黄酮粗提液体积比为1∶1的复合保鲜剂的抗氧化性和抑菌性均较好。贮藏第10天时，使用该复合保鲜剂涂膜肉样的pH值、总挥发性盐基氮含量和菌落总数仍在可食用范围内，同时感官评分也在可接受范围内。结论：壳聚糖-三七叶黄酮复合保鲜剂对冷鲜黄牛肉具有较好的保鲜效果，有效延长其保鲜时间。

A Chitosan-based Coating with Flavonoids Extracted from Panax notoginseng Leaves Extends the Shelf Life of Refrigerated Beef

Objective: Chitosan-based coatings with flavonoids extracted from Panax notoginseng leaves were investigated for their effects on quality and shelf life of beef stored at a refrigerated temperature of (4 ± 2) ℃. Methods: The optimal formulation was determined by antioxidant and bacteriostatic tests, and its preservative effect was analyzed by storage experiments. Results: A 1:1 (V/V) mixture of chitosan and flavonoids had excellent antioxidant and antibacterial activities. The pH value, total volatile basic content (TVB-N) content and total plate count of samples coated with the composite preservative remained in the ranges for consumption, and the sensory evaluation was also still in the acceptable range over 10 days of storage. Conclusion: The composite preservative can preserve the quality and prolong the shelf life of beef under refrigerated storage.