复配生物涂膜保鲜液对冷藏南美白对虾的保鲜效果研究

目的 探究复配生物涂膜保鲜液对冷藏南美白对虾的保鲜效果.方法 以新鲜南美白对虾为原料,通过单因素实验考察壳聚糖、海藻酸钠、明胶及乳酸链球菌素(Nisin)对冷藏南美白对虾货架期的作用.在此基础上优化壳聚糖、海藻酸钠及Nisin所组成的复配涂膜保鲜液的最适配比.结果 壳聚糖6 g/L、海藻酸钠8 g/L、Nisin 0....

Study on the preservative effect of compound biological coating liquid on frozen South American white prawn

Objective To explore the the preservation effect of compound biocoated preservation liquid on frozen South American white prawn. Methods The effects of chitosan, sodium alginate, gelatin and Nisin on shelf life of South American white prawn were investigated by single factor experiment. On this basis, the optimum ratio of the coating fresh-keeping solution composed of chitosan, sodium alginate and Nisin was optimized. Results The best ratio of chitosan 6 g/L, sodium alginate 8 g/L and Nisin 0.4 g/L was coated with a composite preservative and stored in cold storage. The refrigerating period could reach 12 days, the measured pH value was 7.52, and the sensory score was 3, which was 6 days longer than the control group. Conclusion After coating the South American white prawn with the compound preservative, it can isolate the external contact and inhibit the reproduction of bacteria, thus delaying the putrid and deterioration of the shrimps and having better fresh-keeping effect. This study provides a theoretical basis for further research on the relationship between shelf life and specific putrefied microorganisms in South American white prawn.