A simple,sensitive and accurate RP-HPLC method for the separation anddetermination of eight lignans in Diphylleia sinensis was described.The methodhas been appl
The Eu-Tetracycline(TC)-TOPO-sodium dodecyl sulfonate(SDS)system wasstudied,Experiments showed that the maximum fluorescence intensity was obtainedin the pH range o
4,4’-Oxybis(benzoic acid)(Ⅰ)is an important monomer for making synthetic resin,heat resistant filmand liquid crystal fiber,etc.It has been synthesized either
In this paper, the structure of 1-bromomethyl-7,7-dimethyl btcyclo[2.2.1]hept-2-yl acrylate has been studied by X-ray diffraction, and the relation between the
The polarograms of mixture of pyrazine and its methyl deriva-tives consist of overlapping peaks.This generally precludes the direct ana-lysis of these component
The 1.3-dipolar cycloaddition reaction of 2-trifluoromethyl-oxazolone and the activated carbon-carbon multiple bond was studiedand gave a convenient way to synt