The development and application of organosilicone modifying acrylic resin,polyurthane,nitrocotton and casein etc. in leather chemical materials at home and abroad are introduced.

介绍了国内外有硅改酸树脂、有硅改聚氨酯、有硅改硝化棉、有硅改酪素等在皮化材料的发展及应用情况。

It is indicated that chimozine is relative to the forming of peritrophic membrane (PMb) and the den-sity of PMb determined whether Nosema Apis Zander can inject in the ventriculus epithelium.

肠酪素酶与肠围食膜的形成有关，而围食膜的致密度又决定了微孢子虫能否侵入肠上皮细胞。