Thesis introduces methods of chitosan preparation from shrimp shell, and makes application study of chitosan in clarifying fruit juice and keepingfoodfresh.
本文介绍了用虾壳制备壳聚糖的方法，并进行了壳聚糖在果汁澄清和食品保鲜方面的应用研究。
2
The active oxygen generated from the action of silver ions sterilizes the refrigerator environment giving your food a protection shield and keeping it fresh for long hours.
从银色离子的行动引起的活跃氧气消毒给您的食物保护盾和保持它的冰箱环境新鲜在长时间。
3
The foodfresh-keeping bag which has the advantages of easy fabrication, firmness and durability, and low cost can play a favorable foodfresh-keeping function.