sterane meaning in English

甾烷

First of all , the theoretic basis for the stereoisomer rearrangement of biomarker compound is illustrated , and then the corresponding relations between the sterane / terpane stereoisomer rearrangement and maturity , as well as the polarity / non - polarity and petroleum migration are discussed , respectively
首先阐明生物标志化合物立体异构重排的理论依据：然后分别探讨了萜、甾烷类立体异构重排和成熟度对应关系；极性、非极性生物标志化合物异构体重排和油气运移对应关系。
4 ) the characteristic of tricyclic terpane reflected the source input of algae . the predominance of 4 - methylsterane and dinosterane , and the c _ ( 27 ) - sterane predominance " v " distribution pattern all indicate the great contribution of algae source input . based on the ratio of sterane c2920s / ( 20s + 20r ) and c29 / ( + ) , the source rocks can be regarded as typical immature source rocks
2 、利用丰富的生物标志化合物信息，分析解释了生源构成、沉积环境、有机质演化等特征，表明德南洼陷主力烃源岩的生源构成是以菌藻类微生物为主且含有一定陆生植物输入的混合生源，沉积环境为半咸水-咸水还原环境，沉积水体具有“层状”特点，表层盐度高，底层还原性强。