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《天然药物化学总论（journal of natural medicinal chemistry）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、天然药物化学总论（Journalofnaturalmedicinalchemistry）ThefirstchapterisgeneralintroductionFirst,themultiple-choicequestion(a)singlechoice(ineachitemoffiveansweroptions,chooseacorrectanswer,andthecorrectanswerTheserialnumbersarefilledinthebracketsofthequestions1.theprincipleoftwophasesolventextracti
2、onistheuseofvariouscomponentsinamixtureinatwo-phasesolventA.ratioisdifferent,B.distributioncoefficientisdifferent,C.separationcoefficientisdifferentD.extractionconstantisdifferent,E.dielectricconstantisdifferentThe2.principleishydrogenbondadsorptionchromatographyA.ionexchangechromatograph
3、y,B.gelfiltrationchromatography,C.,polyamidechromatographyD.silicagelchromatography,E.,aluminachromatography3.fractionationissuitablefor()A.,polarcomponentB.,polarcomponent,C.,sublimatecomponentD.volatilecomponents,E.,lipidcomponents4.polyamidethinlayerchromatography,thefollowingexpansion
4、agent,thestrongestexpansionabilityis()A.30%ethanolB.absoluteethanolC.70%ethanolD.acetone,E.water5.solventextractedfromhydrophiliccomponentsofnaturalmedicinewaterextractis()A.ether,B.,aceticester,C.,acetoneD.butanolE.ethanol6.theunitofinfraredspectrumis()A.cm-1B.nmC.m/zD.,mm,E.Delta7.inwat
5、er,itisnotprecipitatedbyethanolA.protein,B.polypeptide,C.polysaccharideD.enzyme,E.tannin8.thefollowingsolventsarearrangedaccordingtopolarity,andthecorrectis()A.water>acetone>methanol,B.ethanol>aceticether>etherC.ethanol>methanol>ethylacetateD.acetone>ethanol>methanolE.benzene>ether>methan
6、ol9.isnotrelatedtodeterminingthepurityofacompoundA.determinationofmeltingpoint,B.observationofcrystallineshape,C.smellD.determinationofswirlE.,selectionofmorethantwochromatographicconditionsweredetected10.nonlipophilicorganicsolventsare()1A.chloroform,B.,benzene,C.,n-butanolD.acetoneE.eth
7、er11.,theextractionofheatunstablecomponentsfromnaturaldrugsshouldbeused()A.B.C.refluxextractiondecoctingmethodpercolationmethodD.continuousrefluxmethod,E.distillationmethod()12..Theabbreviationforinfraredspectrumis()A.,UV,B.,IR,C.,MSD.NMRE.HI-MS13.thepolargroupofthe
