简介:ThepurificationprocessoftotalflavonesofginkgoleavesbyresinHZ-841fromethanolextractwasstudied.First,thetotalflavonewasextractedfromthedefattedpowderofginkgoL.bilobaleaves.Effectsofsolventsandoperationconditionswereexaminedtogetarelativehighyieldandpurityinthisstep.ThecrudeextractwasfurtherpurifiedbyresinHZ-841.Bothadsorptionandelutionprocesswerestudiedtoobtainanoptimizedconditions,i.e.,pH,flowrate,concentration.Ayellowpowderwasobtained,ofwhich37.3%wasflavones,obviouslyhigherthanthebasicinternationalstandardof24%.
简介:Electrostaticlayer-by-layerself-assemblymultilayerfilmsweresuccessfullyfabricatedfromC60-ethylenediamineadduct(C60-EDA)andDNA.Undervisiblelightirradiation,DNAisreadytobecleavedandthefilmsaredestroyed.