petroleum ether造句
(31) Overview: The Division tree orchid extract mainly the growth of China's Guangxi region orchid tree as raw material obtained by petroleum ether extract extract.
(32) To obtain chemical constituents from the fruit of Catalpa ovata G. Don, the methods of water extraction, ethanol extraction and petroleum ether extraction were used.
(33) The petroleum ether fraction of the soft coral Sinularia sp. exhibited high lethal rate to brine shrimp and strong cytotoxin to KB and KBV200 cells.
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