The extraction of penicillin G with petroleum sulphoxide and di - isooctyl.系统研究了亚砜类萃取剂石油亚砜和二异辛基亚砜萃取青霉素G的性能.A gas chromatography method for the quantitative analysis of isooctyl acid was introduced in this paper.摘要建立了异辛酸合...
Converting metric measurements to U.S. equivalents is easy.将公制计量单位换算为美制计量单位十分简单。The continental beds are as thick as their marine time equivalents.陆相地层与其时代相同的海相地层具有一样的厚度.We have already met one series of specific enol eq...