Azone 又名月桂氮(艹卓)酮是美国 NEL SON公司开发的一种高效皮肤促透剂。做为透皮给药的促透剂广泛用于外用膏霜乳剂药品和化妆品。与其他促透剂相比有以下优点:(1)促透性强:本品1%的浓度比50%的DMF,DMA,DMSO 的作用强12倍。1.8%Azone...Azone 又名月桂氮(艹卓)酮是美国 NEL SON公司开发的一种高效皮肤促透剂。做为透皮给药的促透剂广泛用于外用膏霜乳剂药品和化妆品。与其他促透剂相比有以下优点:(1)促透性强:本品1%的浓度比50%的DMF,DMA,DMSO 的作用强12倍。1.8%Azone 可使氟嘧啶的渗透力增加80倍。(2)适用范围广:Azone展开更多
Eighty-one karst types and their main characteristics are described in this study,including the conditions of their development,the main characteristics of their karstification and their characteristic features.The cl...Eighty-one karst types and their main characteristics are described in this study,including the conditions of their development,the main characteristics of their karstification and their characteristic features.The classification includes the karst types of the Earth,a concise description of each karst type and the possibilities of belonging to several types of various karst areas.The classification of types is hierarchical in terms of groups,subgroups,types and subtypes.Karst can be classified according to their momentary state(the group of static karst types)and to their development(group of dynamic karst types).The group of static karst types has the azonal and zonal subgroups.Azonal karst types may be situated under any climate.These karst types are categorized according to their geological characteristics(age of karstification,constituting rock,extent of coveredness,structure),their elevation,expansion,the morphology of their surface,hydrology and to the effects occurring on the karst.Taking the above mentioned factors into consideration,the author distinguishes various types and describes their characteristics.Zonal karst types are also described(tundra karst,temperate karst,subtropical karst,tropical karst),karst types that can be distinguished based on their geomorphic evolution are identified and their characteristics are presented.展开更多
文摘Eighty-one karst types and their main characteristics are described in this study,including the conditions of their development,the main characteristics of their karstification and their characteristic features.The classification includes the karst types of the Earth,a concise description of each karst type and the possibilities of belonging to several types of various karst areas.The classification of types is hierarchical in terms of groups,subgroups,types and subtypes.Karst can be classified according to their momentary state(the group of static karst types)and to their development(group of dynamic karst types).The group of static karst types has the azonal and zonal subgroups.Azonal karst types may be situated under any climate.These karst types are categorized according to their geological characteristics(age of karstification,constituting rock,extent of coveredness,structure),their elevation,expansion,the morphology of their surface,hydrology and to the effects occurring on the karst.Taking the above mentioned factors into consideration,the author distinguishes various types and describes their characteristics.Zonal karst types are also described(tundra karst,temperate karst,subtropical karst,tropical karst),karst types that can be distinguished based on their geomorphic evolution are identified and their characteristics are presented.
