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简介：EthylN-cyanomethytbenzenecarboximidatereactedwithaliphaticaldehydesunderthesolid-liquidPTCconditiontogirea-ethoxyphenylmethylene-aminoacrylonitrilederivativesandoxazolinederivatives.Itisaconvenientandnewmethodforsynthesisofβ,β’-dihyroxy-a-aminoacidsbyhydrolysisoftheoxazolinederivatives.

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简介：Thecomparisonofsolidphaseextraction(SPE)forthepreconcentrationandisolationofpolyphenolsintobaccosampleswascarriedoutbyultra-highperformanceliquidchromatography/tandemmassspectrometry(UPLC/MS/MS)andmultivariateanalysis.SeveraladsorbingmaterialsofSPE(C18,NH2,SAXandOASIS)wereinvestigated.ItwasfoundthattheC18andOASIScartridgescannotonlyspeedupthepurificationprocess,butalsosimplifytheSPEoperation.AUPLC/MS/MSwasusedforthedeterminationofpolyphenolsintobaccosamplesafterpurification.Allanalyteswereseparatedanddeterminedin2min.Thelimitofdetectionwas0.05ng/mL.Clusteranalysis(CA)andprincipalcomponentanalysis(PCA)wereusedfortheanalysisof4varieties(flue-curedtobacco,orientaltobacco,sun-curedtobaccoandburley)inordertointerprettheeffectofplantingandmachiningprocessontheconcentrationofpolyphenols.ThedifferenttypesoftobaccosamplescouldbeeasilyclusteredbyCA.PCAonthechemicalcompositionoftobaccoresultedintwoprincipalcomponents(PCs)thattake84.2%ofthetotalvariance.ThePCAandCAindicatethatthepolyphenolscanbeusedfordistinguishingtobaccotypes.

简介：为踪迹更少的一个新奇灵巧的过程在好收益并且与用支持聚合物的乙烯基硒化物的优秀纯净的3代用品isoxazoles的稳固阶段的合成被开发了。

简介：为拳头预定准备一主要固态包括1-methyl-3-propylimidazolium碘化物(MPII)的高有效的电镀物品传导性的材料，benzimidazole(双性人)，碘和锂碘化物被报导。在这电解质，双性人充当不仅添加剂而且gelators。与它的重要电气化学的性质，3.07%的全面效率不到AM1.5被完成(100mW/cm2)。

简介：Shortpeptidesbasedonthetripeptides,Leu-Arg-ProandLeu-Lys-Pro,weresynthesizedbymicrowaveassistedsolid-phasesynthesismethod,inordertomakeasearchforpotentialinhibitorsforangiotensinI-convertingenzyme(ACE)withminimumsideeffectsinthetreatmentofhypertension.OnepeptidewiththesequenceLeu-Arg-Pro-Phe-PheshowsthestrongestinhibitiontowardsACEwithanIC50valueof0.26μmol/Linvitro.Thestudyofstructure-activityrelationshipshowsthattheintroductionofabulkygroupintotheN-terminalofthisseriesofinhibitorsmayenlargesterichindrance,resultinginthepoorinhibitoryactivitytowardsACE.TheinhibitoryactivitydecreasedinturnwhenL-Pro,D-ProorAc6cwasattheC-terminalrespectively.ThebindinginteractionbetweeneachoftheseinhibitorsandtesticularACE(tACE)wasperformedbymoleculardocking.TheresultssuggestthatLeu-Arg-Pro-Phe-PhemainlyoccupiedtheS1subsiteoftACE,andmadecontactwithtACEviasevenH-bonds.ItappearedthatthesiteonthepeptidethatboundwithtACEwasinfluencedbytheconfigurationoftheaminoacid,LorD-form,attheC-terminalofthepeptide.

简介：Rare-earthcompoundsolidsuperacidSO42-/TiO2/La3+wasprepared.Itscatalyticactivitywasexaminedunderdifferentsyntheticconditionsfortheesterificationofpropanoicacidandn-butylalcoholasprobingreaction.Theoptimumconditionswerealsofound,whichwerethepH=8,thedepositingtimewas24h,themassfractionofLa(NO3)3usedinsolidsuperacidwas5%,theconcentrationofH2SO4was1.25mol/L,thesoakingtimeinH2SO4was16handthecalciningtemperaturewas500°C.TheethyloleatewassynthesizedfromoleicacidandethanolinthepresenceofSO42-/TiO2/La3+.Theoptimumreactionconditionswereobtainedwhichwerethereactiontimewas6h,molarratioofoleicacidtoethanolwas1:4andthemassfractionofcatalystwas4%.

简介：Amantadine(AMA)是在养蜂过去常保护蜜蜂免于sacbrood病毒(Moratoraetatulae)的抗病毒的药。这研究描述了可靠高效的液体色析法(HPLC)为用稳固阶段的抽取(SPE)在蜂蜜分析AMA的方法为纯化的子弹(PlexaPCX)，4-fluoro-7-nitro-2,1,3-benzoxadiazole(NBD-F)作为一个列前derivatization代理人，和fluorometric察觉(ex=470nm，em=530nm)。色析法的分离在XDBC18列上被执行(150

简介：打印屏幕的nanoporousTiO2薄电影被采用制作敏化染料固态把CuI用作洞运输材料的太阳能电池。基于nanoporous，有大毛孔的TiO2薄电影由聚苯乙烯的增加形成了的太阳能电池与200nm的直径成球形到TiO2浆糊展览光电的表演改进，它与大毛孔在这部电影由于CuI的容易的穿入被归因于与敏化染料的薄电影的表面的CuI的好接触。

简介：Afacilesolidphasesynthesisof2-substituted1,3-oxazin-6-onesusingpolymer-supportedMeldrum'sacidhasbeenreported.Reactionoftheresin-boundcyclicmalonicacidesterwithtriethylorthoformateandsubsequentdoublesubstitutionwithamide,affordedthecorrespondingpolymer-supportedacylaminomethylenecyclicmalonicacidester,whichuponthermaltreatmentledto1,3-oxazin-6-onesingoodyieldsandwithhighpurity.

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简介：为Mn(II)的preconcentration的一个过程，Fe(II)，公司(II)，Cu(II)，Cd(II)，Zn(II)，Pb(II)和Ni(II)被火焰AAS为环境样品的分析基于他们有在列的AmberliteXAD-2000树脂上的8-hydroxyquinoline(HQ)的建筑群的保留建议。象pH，eluent类型，卷，集中，流动率和样品答案的体积那样的各种各样的参数，和金属离子的保留上的矩阵干扰效果被调查。为在问题的金属建筑群的保留的最佳pHs除了为其价值是8的Mn2+是大约6。为从在最佳条件下面的树脂的这些金属和他们的恢复的吸附物的装载能力在范围是6.829.26mg

简介：氧化铝在层次地多孔的氧化锆固体酸做和硫酸化经由一个壶和bi-surfactant-assisted同时被完成了自己组装过程，把铝硫酸盐用作艾尔和SO42吗？来源。没有氧化铝没有层次地多孔的结构，做和做Al的sulfated氧化锆，准备的合成的稳固的酸与sulfated氧化锆相比为酯化作用反应显示出许多提高的酸味和再循环的催化活动。

简介：为isoxazolo的合成的一个快速、有效的方法[5,4-d]pyrimidin-4(5H)在与固体的常规加热和没有溶剂的微波照耀下面与orthoesters通过5-aminoisoxazole-4-carboxamides的出租机动三轮车冷凝作用被开发了酸催化。在比较，反应更快，收益在微波照耀下面是更高的。

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简介：三聚氰胺并且poly，vinylpyrrolidone(PVP)乐意地与整洁的硫磺的酸反应了也就是形成二新器官的稳固的酸三聚氰胺--(H2SO4)3并且PVP-(H2SO4)n。这些稳固的酸面对NH4NO3象另外的酚一样被用于bisphenolA的第一硝代。Mono-nitro和di-nitrobisphenolA与红外和1HNMR技术被描绘了。