The characteristics of antifungal constituents in thefamilies of Gramineae, Leguminosae, Rosaceae, Compositae and Cruciferae were emphasized.侧重介绍了禾本科 、 豆科 、 蔷薇科 、 菊科和十字花科植物中抗病原真菌的活性物质的特点.Alfalfa is a member of the legume...
Dolostone is the main rock type of the Cambrian in this area.从下寒武统石龙洞组开始都是白云岩沈积.Crystalline dolostone is formed by seepage - reflux dolomitization and burial dolomitization.晶粒白云岩有两种成因:一为回流渗透白云石化;二为深埋藏白云石化.Carbonate rocks...