研究了用紫外分光光度法测定焦性没食子酸含量的一种新方法.An UV - spectrophotometry determination method for pyrogallic acid content was studied.目的测定铁苋菜中没食子酸的含量.Objective To determine the content of gallic acid in Acalypha australis L.目的:建立高效液相测定珠子肝泰...
You need someone to take the pressure off and help you get back on your feet...你需要有人为你分担压力，帮你恢复元气。He said he was off to the beach and would we care to join him.他说他要去海滩,问我们愿不愿和他一块儿去。Clark shook hands with the pilot and wa...
The process comprises first oligomerizing isobutylene to diisobutylene using a sulfonic acid type ion exchange resin.所述的方法包括首先异丁烯用磺酸型离子交换树脂低聚生成二聚异丁烯....