Its metallation and addition to cyclopentanone proceeded well to 40.其金属取代物能和环戊酮顺利地反应得到40.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.以单质碘为催化剂合成了环戊酮乙二缩酮.Methyl dihydrojasmonate was synthesized fro...
DDTs and HCHs serum level were detected by EC - ECD .运用GC -ECD 方法检测血清中有机氯农药DDTs和HCHs水平.In DDTs the residual level of p, p?DDTs中p, p?The residual levels of DDTs, HCHs in soil were different with different utilization type...
他努力地和阵阵袭来的倦意斗争着。He tried to fight the sleepiness that overwhelmed him.做出改变的秘诀不是多么努力地和过去做斗争，而是全力以赴地去打造全新的自己。The secret of change is to focus all of your energy, not on fighting the old, but on building the new.--Socrates你...