stagnant film

To increase the efficiency of the mass transfer of packing,we can consider increasing the specific surface area of packing,raising the utilization ratio of surface,and the diffusing coefficient,or decreasing the thickness of the stagnate membrane.

提高填料的传质效率 ,可以考虑加大填料的比表面积 ,提高表面利用率 ,提高扩散系数或减小滞流膜层厚度等。

AIM To evaluate how solution viscosity affects the precorneal residence of five water soluble polymers with different properties.

目的　比较水溶性聚合物的角膜滞留能力 ,评价溶液粘度对其角膜滞留时间的影响 ,为眼用液体制剂的处方设计提供参考。