The dense top layer as well as porous supporting layer can be made by duel-bath coagulation method simultaneously.
双凝固浴成膜方法可同时获得较厚的致密表面层和疏松多孔的支撑层。
A porous silk fibroin membrane could be prepared through freeze-drying process, with dense top surface, porous bottom surface in low porosity and porous inner portion in high porosity.
采用冷冻干燥法可以制得下表面为致密结构，上表面为孔隙率较小的多孔结构，而内部是孔隙率较大的多孔结构的丝素膜。
The dense, semirigid, porous, calcified connective tissue forming the major portion of the skeleton of most vertebrates. It consists of a dense organic matrix and an inorganic, mineral component.
骨质，骨骼构成大多数脊椎动物 骨架主要部分 的稠密 的、半刚性 的、 多孔 的、钙化 的连结组织。
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