Objective To evaluate the methylobalamin releasing character in the carrier of DL-PLA/CHI compound membrane in vitro , and disscuss feasibility of the new administration route.

• 目的对消旋聚乳酸/甲壳素复合膜作为载体时,甲钴胺体外释放情况进行评价,探讨其这种新的给药途径的可行性。