The preparations and the structures and the properties of chitin and chitosan are introduced,and the applications in immobilization and flocculant and drug delivery system and so on are discussed.

• 对甲壳素和壳聚糖的制备工艺,结构与性质以及其在固定化酶、药物控释载体、絮凝剂、吸附剂、医用敷料等方面的应用进行了综述。