The ethanol extract from the twig bark powder of Periploca sepium was suspended in water and successively treated with petroleum ether, ethyl acetate and n-butanol.
将杠柳枝皮粉末的乙醇提取物悬浮于水后，依次用石油醚、乙酸乙酯和正丁醇萃取。
It was found that both n-hexane and petroleum ether were good solvent for ultrasonic-assisted process.
结果表明，正己烷和石油醚作提取溶剂效果较好。
Easy to cause fire and poisoning please close the liquefied petroleum gas immediately. \n openjumper ";"
容易引起火灾和中毒请立即关闭液化气。
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