简介：当他们被介绍进主要的链时，热imidizaiton上的benzimidazole单位的效果被学习poly(amic酸)(泛美航空公司)。PAA-PABZ的热imidization过程由3,3,4,4-biphenyltetracarboxylicdianhydride(BPDA)综合了，2-(4-aminophenyl)-5(6)-aminobenzimidazole(PABZ)被TGA学习，DSC，直接存储器存取，FTIR并且在situFTIR。FTIR并且在situFTIR的结果显示单位充当的benzimidazole一在里面当温度比170低时，加速泛美航空公司的热imidization到polyimide(PI)的situ催化剂?????????????????????????ㄠ?????獩瑯捡楴?????偩???h

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简介：Ithasbeenfoundthatthetwo-phasereactionsofaqueousHCl,HOAcorH3PO4withprimaryamineN1923inchloroformareosiclatingreactions.Theirpower-timecurvesweremeasuredbythetitrationmicrocalorimetricmethod,andtheinductionperiod(tin).Thefirstoscillatingperiod(tp.1)andthesecondoscillatingperiod(tp.2)weredetermined.Theapparentactivatingparametersandtheordersoftheoscillatingsystemswerecalculatedandthefollowingrelationshipswereestablished:fortheoscillatingsystemofhydrochloricacid.

简介：Thetreatmentandresourcereuseof1,2,4-acidproducingwastewaterbyself-mademacroporousadsorptionresinND,A-107wasstudiedinthispaper.Optimumadsorptionanddesorptionprocessparameterswereacquiredbysystematicallystudy.ThepolymericresinNDA-107indicatedgoodadsorption&desorptionof1,2,4-acidinthewastewater.Theremovalefficiencyof1,2,4-acid,CODerisabout78%,72%respectively.Itisevidentthatthisadsorptionprocessisanefficienttreatmentmethodfor1,2,4-acidproducingwastewater.Atthesametime,theaccumulationandresourcereuseofl,2,4-acidcanberealizedinthisprocess.

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简介：对待热的激活的碳(TAC)上的元素的水银俘获用实验室规模被学习固定的床反应堆。TAC的能力被学习在N2和基线气体气氛下面执行Hg0俘获，普通的酸气体成分的效果个别地被评估避免源于多重部件的共存的复杂并发症。结果建议激活的碳(交流)上的功能的组(SFG)是的那表面对当酸气体不在时的Hg0俘获重要。同时，酸气体部件的存在在TAC戏上结合了有缺点的graphitic格子在有效Hg0的一个重要角色俘获。HCl的存在，NO2，并且显著地个别地不由于Hg0的异构的氧化在TAC上在基本气体提高Hg0俘获在有缺点的graphitic格子在TAC上在碳表面和催化作用上创造的酸的地点上。同样，SO2的存在在大约20%改进Hg0俘获。这改进多半在碳表面上由于催化作用由SO2在AC表面和元素的水银的氧化上源于硫组的免职。而且，当酸气体在烟道气体是在场的时，O2在Hg0氧化和俘获上展出synergistic效果。

简介：ThecomplexresinspreparedfrommacroporoussulfonatedresinD72(H^+form)withferricchlorideorferricchloridehexahydratehavebothsitesofBronstedacidandLewisacid.Inthecatalysisofexterificationofaceticacidwithbutanolthecomplexresinsshowtohavemuchhighercatalyticactivitythanthatofitsmatrix.aconventionalsulfonatedcationexchangeresinD72.

简介：Arylhalidesareakindofextremelyvaluablecompoundsusedintransition-metal-catalyzedcouplingreactions,aswellasimportantstructuremotifsinmanynaturalproductsandmanufactureddrugs[1,2].Theclassicalapproachforpreparationofhaloarenesiselectrophilicaromaticsubstitution(EAS)usingvarioushalogenatingreagentsoroxidativehalogenationswithhalogenatingreagentgeneratedinsitufromhalidesandoxidants,suchasperoxide,oxygenandmeta-cholorperoxybenzoicacid(mCPBA)[3,4].However,harshreactionconditionsarerequiredforhalogenationoflessactivearomatics.orthoMetalationfollowedbyhalogenquenchingisanotherapproachforhalogenationofaromatics[5].However,thereareobviousdrawbacksforthesemethods,suchaslowregioselectivity,harshconditionsandevendangerousprocedures.Therefore,thedevelopmentofanalternativeandpracticalwayremainschallengeinorganicsynthesis.

简介：由di-(2,4,4-trimethylpentyl)的L本氨基丙酸的抽取行为phosphinic酸，di-(2,4,4-trimethylpentyl)-monothiophosphinic酸和di-(2-ethylhexyl)磷的酸分别地在二阶段、三阶段的系统被学习。为这些抽取反应的平衡常数是计算的。

简介：Asimpleeffectivesynthesisofbis(dihydropyrimidinone-4-yl)benzenederivatives,usingboricacidascatalyst,fromisophthalicaldehydeorterephthalicaldehyde,1,3-dicarbonylcompoundsandureaorthioureainglacialaceticacidwasdescribed.AstheexpansionoftheclassicalBiginellireaction,thismethodhastheadvantageofexcellentyields83%-94%andshortreactiontime0.5-1.5h.

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简介：Inanattempttofindnewantitumoragents,anovelclassofchromonecompoundswithabenzimidazoleorabenzoxazoleringinpositions2or6weresynthesizedviacondensationinpolyphosphoricacid(PPA)byusingchromoneacidsasthestartingmaterials.Duringthepreparationprocess,itwasfoundthatPPAcouldcleavethechromoneringtoproducearing-openingcompound(6).Themolarratioofthechromonecompound(5)tothering-openingcompound(6)variedwiththechangeofreactiontemperatureandtime.BasedonMTTprotocol,theantitumoractivityofeachofthecompoundsobtainedwasevaluatedagainstthreehumancancercelllines:KB(oralepidermal),A2780(ovary)andBel7402(liver).TheIC50variedfrom54.7μmol/Ltomorethan180μmol/L.

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简介：Theremediationofgroundwaterwhichcontainschlorinatedorganiccompounds(COCs)bynanoscalebimetalliccatalystshasreceivedincreasinginterestinrecentyears.Thisreportpresentsthedechlorinationof2,4-dichlorophenol(2,4-DCP)byPd-Febimetallicnanoparticlesinthepresenceofhumicacid(HA)toinvestigatethefeasibilityofusingPd-Fefortheinsituremediationofcontaminatedgroundwater.OurexperimentalresultsindicatedthatHAhadanadverseeffectonthedechlorinationof2,4-DCPbyPd-Fenanoparticles.Therateconstantkvaluesof2,4-DCPdechlorinationwere0.017,0.013,0.009,0.006and0.004min?1forHAconcentrationsof0,5,10,15and20mg/L,respectively.TherelationshipbetweenHAdosageandkvaluescanbedescribedasalinearmodel.

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简介：Thestructureandkineticsofthecomplexformedbyhyaluronicacid(HA)andpoly(L-lysine)(PLL)werestudiedbytimeresolvedlaserlightscattering,TEM,andAFM.BecauseHAhasahydrophilicbackbone,thecomplexesformedbyHAandPLLaredifferentfromthoseformedbyoppositelychargedpolyelectrolytesbothhavinghydrophobicbackbones.Insteadofformingstrongaggregatesandevenprecipitates,thecomplexinthepresenceofexcessHAisstableinthestudiedtimeperiod.Moreimportantly,thecomplexspontaneouslyformscore-coronastructurebytherearrangementofHAchains.ThecoreiscomposedofcomplexrichofPLLandthecoronaismainlyHA.FurtheranalysisshowsthatthehydrogenbondformedbyHAcreatesabarrierhinderingthefurtherrelaxationofHAchains.Theautomaticformationofcore-coronastructurebyPLL/HAishelpfulnotonlytounderstandtherelaxationofpolyelectrolyteincomplex,butalsotodevelopdrugcarrierswithdesirableproperties.

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简介：2'-methacryloxy-3α,7α12α-trimethacryloylcholicacidethylester(CAGE4MA)hasbeenpreparedfromcholicacid.Photo-polymericresinswerepreparedfromCAGE4MA.2,2-bis[4-(2-hydroxy-3-methacrylyloxypropoxy)phenyl]propane(bis-GMA)wasusedforcomparison,triethyleneglycoldimethacrylate(TEGDMA)wasusedasdiluent.Thepolymerizationwasinitiatedbycamphoroquinone(CQ)/N,N-dimethylaminoethylmethacrylate(DMAEMA)system.TheconversionofCAGE4MAwas39%whenthereactiontimeis60s,whichislowerthanbis-GMAandTEGDMA.TheswellingvalueofCAGE4MAresinwas0.41%indistilledwater,whichismuchlowerthanthoseofbis-GMAresin(2.04%)andTEGDMAresin(4.77%)underthesameconditions.CopolymersfromCAGE4MAandTEGDMAhavebeenprepared.WiththeincreaseofTEGDMAinmixture,thedegreeofconversionofCAGE4MAandswellingvalueincreased.Theswellingvaluesofphotocuredresinsin0.1mol/LHClwerealsomeasured.