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简介：Triptolide(1)gave2-9undervariousconditionsspecifiedinthetext.

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简介：Basedontherainbow-ladderapproximationoftheDyson-Schwingerequationsandtheassumptionoftheanalytieityofthefermion-bosonvertexintheneighborhoodofzerochemicalpotential(μ=0)andneglectingtheμ-dependenceofthedressedgluonpropagator,weapplythemethodin[Phys.Rev.C71(2005)015205]ofstudyingthedressedquarkpropagatoratfinitechemicalpotentialtoprovethatthegeneralfermion-bosonvertexatfiniteμcanalsobeobtainedfromtheoneatμ=0byasimpleshiftofvariables.Usingthisresultweextendtheresultsof[Phys.Lett.B420(1998)267]tothesituationoffiniteehemicalpotentialandshowthatundertheapproximationswehavetaken,theGe11-MannOakesRennerrelationalsoholdsatfinitechemicalpotential.

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简介：Threenewditerpenoids,namedesquirolinB(1),C(2),D(3)respectively,andtwoknowncemocundseariocal(4)andtaraxerolwereisolatedfromColeusesquirolii(Levl).Thestructureelucidationwasachievedbyspectroscopicmeans

简介：五味子sphenanthera的茎的化学成分第一次被描述。这调查导致了新酉分的glycoside(1)的隔离，与七已知的混合物一起。1的结构被使用分光镜的技术分配，包括2DNMR系列。

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简介：Theeffectofdifferentkindsofcomonomerswithorwithoutflexiblechainonproper-tiesofcopolyesters,suchastransitiontemperature,crystallizationvelocity,crystallinityandsizeofcrystallites,isstudied.Theexperimentalresultsindicatetheobviousdiffer-enceinpropertiesbetweencomonomerswithiso-andortho-structureofphenylringandcomonomerswithflexiblechain.Theinfluenceofchemicalstructureofcomonomersonpropertiesofcopolyestersisdiscussed.

简介：ＴＨＥＣＨＥＭＩＣＡＬＳＴＲＵＣＴＵＲＥＯＦＣＥＬＡＳＴＲＩＮＥＦＲＯＭＣＥＬＡＳＴＲＵＳＦＬＡＧＥＬＬＡＲＩＳ￥ＭｉｎｇＡｎＷＡＮＧ；ＭｉｎＷＡＮＧ；ＪｕｎＬＩＵ；ＦｕＨｅｎｇＣＨＥＮ（ＤｅｐａｔｍｅｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙ，Ｂｅｉｊ...

简介：'ChemicalResearchinChineseUniversities',sponsoredbyJilinUniversitymandatedbytheMinistryofEducationofP.R.ChinaandpublishedbyHigherEducationPress,isacomprehensiveacademicjournalinthefield

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简介：为了在大气的踪迹部件，包括煤气阶段的化学过程的acoupled盒子模型，热力学的平衡处理的喷雾器，和异构的化学药品上探索异构的化学过程的可能的影响，在灰尘的表面上处理，黑碳(BC)和海盐被设置在喷雾器表面上模仿异构的化学的效果，并且分析影响异构的过程的主要因素。结果显示在空气的喷雾器表面上的异构的化学过程将影响踪迹气体例如的集中H2O2，HO2，O3，NO2，NO3，HNO3和SO2，和象SO42那样的喷雾器?，NO3吗？并且NH4+。敏感测试建议异构的进程的影响的大小强烈取决于喷雾器集中和系数在框模型使用了的表面举起。然而，异构的化学过程上的温度的影响是更加少些。HNO3的renoxification将影响象氮氧化物和臭氧那样的对流层的部件。

简介：Astructuralgene(750bp),whichcodesforatypeIribosomeinactivatingprotein,trichosanthin,hasbeendesignedaccordingtothecodonusageofhighlyexpressedgeneinE.coliandchemicallysynthesized.Inthesynthesizedgene,twenty-sevenuniquerestrictionsiteswereevenlydispersedwithanaveragedistancebetweentwoadjacentsiteslessthan50bptofacilitateasystematicinvestigationonstructure-functionalrelationshipofthisproteinbysite-directedmuta-genesis.Tosynthesizeit,thewholegenewasdividedintothreelargefragments(EP,PNandNH)whichwereassembledfromseveralchemicalsyntheticoligonucleotidesbyenzymaticmethod.TheassemblyofboththefragmentEPfromsixoligonucleotides(A-F)andthefragmentPNfromfouroligomers(G-J)wascatalyzedbyT4DNAligaseinusingthesinglestrandedDNAmethod[Chen,H.-B.etal,Nucl.AcidsRes.,18,871(1990)].AndfragmentNHwasformedfromthreeduplexesK,LandMbytheclassicaldoublestrandedDNAmethod.Finally,

简介：'ChemicalResearchinChineseUniversities',sponsoredbyJilinUniversitymandatedbytheMinistryofEducationofP.R.ChinaandpublishedbyHigherEducationPressinChina,isacomprehensiveacademicjournalinthefieldofchemistry.Thejournalcontainsoriginalpapers,researchnotes,lettersandreviewswrittenbyfaculty

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