The ubiquity of phenanthrene series, chrysene series compounds, perylene and retene compounds in the sediment indicated that PAHs mainly came from the terrestrial plants.

在中检测到角鲨烯，表明这一地区存在生物甲烷合成和细菌作用，具有生成油气及然气水合物可能性。

In this study a series of different maturation degree coals are yielded by thermally treating a lowgrade lignite, and are used as the sorbents for sorption equilibrium study of phenanthrene.

将云南先锋褐采用热模拟实验方法制得一组成熟度不,并将中干酪根用于对菲吸附研究。