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简介：Anovelcovalentlymodifiedglassycarbonelectrodewithβ-cyclodextrinwaspreparedviaelectropolymerizationtechniqueforthesimultaneousdeterminationofuricacid(UA),xanthine(XA),hypoxanthine(HX)anddopamine(DA).ThisnewelectrodepresentedanexcellentelectrocatalyticactivitytowardstheoxidationofUA,XA,HXandDAbycyclicvoltammetry(CV)method.Theoxidationpeaksofthefourcompoundswerewelldefinedandhadtheenhancedpeakcurrents.TheseparationpotentialsoftheoxidationpeaksforDA-UA,UA-XAandXA-HXwere150,390and360mVinCV,respectively.Bymeansofdifferentialpulsevoltammetry(DPV)method,thecalibrationcurvesintherangesof10―225,5―105,10―170and5―150μmol/LwereobtainedforUA,XA,HXandDA,respectively.Thelowestdetectionlimits(S/N=3)were5,1.25,5and1.5μmol/LforUA,XA,HXandDA,respectively.ThepracticalapplicationofthemodifiedelectrodewasdemonstratedbythedeterminationofDAinhydrochlorideinjectionandUA,XA,HXinhumanurinesamples.

简介：PolysaccharidecoatedPLAnanoparticlesbearingaldehydegroupswerepreparedbydialysisofDMSOsolutionofcholesterolhydrophobic-modifieddextranpolyaldehydeandPLAagainstwater.Theaveragediameterofthenanoparticleswasabout160nm,andthesizedistributionwasnearlyhomogenous.ThenanoparticleswerefunctionalizedsimultaneouslywithCD71andEGFRantibodythroughtheSchiff'sbasereaction,andthenradiolabeledwith~(99m)Tc.Afterperfusedtheradiolabelednanoparticlesintotumor-bearing...

简介：Anefficientrouteforthesynthesisof5-(arylpropenylidine)-2,4,6-pyrimidinetrione3fromanappropriateα,β-unsaturatedaromaticaldehydes1andbarbituricacid2underbothnon-catalyticandsolvent-freemicrowaveirradiationconditionswasdescribed.Inthisway,arangeofbiologicallyimportantcompounds3wasobtainedingoodtoexcellentyields(86-98%)inaveryshortreactiontime(30-80s).

简介：在这研究，新有点磁性、光的Fe3O4/CdTenanocomposites的准备被表明。SuperparamagneticFe3O4nanoparticles被铁、铁的离子的热水的一起沉淀首先综合，与丁氨二酸酸与tetramethylammonium氢氧化物(TMAOH)和化学激活由他们的表面的修正列在后面。修改表面的Fe3O4nanoparticles当时与CdTe量点(QD)是covalently涂的，它与mercaptoacetic酸(MPA)被修改，到通过Fe3O4和carboxyl的表面上的氨基的组的协作的Fe3O4/CdTe磁性、光的nanocomposites在CdTeQD上组织的形式。同样综合的nanocomposites的结构和性质被描绘。nanocomposites与40-50nm，黄绿色的排放特征和房间温度强磁性的一条平均直径拥有了结构，这被显示。荧光和nanocomposites的紫外力的吸收系列显示出CdTeQD与那些作比较的蓝移动。蓝移动的机制被介绍。nanocomposites与8.9emu/g的浸透磁化保留了铁磁性的性质。

简介：Bilayerhumidity-responsiveactuatorsaregenerallycomposedofactuatingandsupportinglayersofdifferentmaterialswithlargelydifferentwettability.Suchkindsofbilayeractuatorssufferfromlowadhesiveforcebetweenthetwolayersduringusage.Thisstudydemonstratesthepreparationofhumidity-responsivebilayeractuatorsthathavethesamematerialsintheactuatingandsupportinglayerstoavoidtheadhesiveissue.Thebilayeractuatorsconsistofaporouspoly(acrylicacid)σAA)/poly(allylaminehydrochloride)(PAH)layerandanonporousPAA/PAHlayerthatarefabricatedbyexponentiallylayer-by-layerassemblymethod.Atahigh/lowrelativehumidity(RH),thenonporousPAAIPAHlayercanefficientlyexpand/shrinkbyabsorbing/desorbingwaterwhilethevolumeexpansion/shrinkageoftheporousPAA/PAHlayerinanenvironmentwithchangedhumidityissignificantlysuppressedbythemicrometer-sizedpores.Thelargelydifferentexpansion/shrinkageofthenonporousandporousPAA/PAHlayerswhensubjectedtohumiditychangesenablesrapidandreversiblerolling/unrollingmotionsofthebilayeractuator.Thebilayeractuatorshowsafasterrollingspeedandalargerbendingcurvaturewhensubjectedtoalargerhumidityincrease.

简介：Atomtransferradicalpolymerizationofstyrene(St)andmethylmethacrylate(MMA)inbulkandindifferentsolventsusingactivatorsgeneratedbyelectrontransfer(AGETATRP)wereinvestigatedinthepresenceofalimitedamountofairusingFeCl3·6H2Oasthecatalyst,ascorbicacidsodiumsalt(AsAc-Na)asthereducingagent,andacheapandcommerciallyavailabletetrabutylammoniumbromide(TBABr)astheligand.ItwasfoundthatpolymerizationinTHFresultedinshorterinductionperiodthanthatinbulkandintolueneforAGETATRPofSt,whilereferringtoAGETATRPofMMA,polymerizationinTHFshowedthreeadvantagescomparedwiththatinbulkandtoluene:1)shorteningtheinductionperiod,2)enhancingthepolymerizationrateand3)havingbettercontrollability.Thelivingfeaturesoftheobtainedpolymerswereverifiedbychainendanalysisandchain-extensionexperiments.

简介：ThepreparationandcharacterizationofanimmobilizedL-glutamicdecarboxylase(GDC)werestudiedThisworkistodevelopasensitivemethodforthedeterminationofL-glutamateusinganewbiosensor,whichconsistsofanenzymecolumnreactorofGDCimmobilizedonanovelionexchangeresin(carboxymethyl-copolymerofallyldextranandN.N'-methylene-bisacrylamideCM-CADB)andionanalyzercoupledwithaCO2electrode.Theconditionsfortheenzymeimmobilizationwereoptimizedbytheparameters:buffercompositionandconcentration,adsorptionequilibrationtime,amountofenzyme,temperature,ionicstrengthandpH.ThepropertiesoftheimmobilizedenzymeonCM-CADBwerestudiedbyinvestigatingtheinitialrateoftheenzymereaction,theefffectofvariousparametersontheimmobilizedGDCactivityanditsstability.AnimmobilizedGDCenzymecolumnreactormatchedwithaflowinjectionsystem-ionanalyzercoupledwithCO2electrode-datacollectionsystemmadeuptheoriginalformoftheapparatusofbiosensorfordeterminingofL-glutamateacid.Thelimitofdetectionis1.O×1O-5M.Thelinearityresponseisintherangeof5×1O-2-5×1O-5M.Theequationoflinearregressionofthecalibrationcurveisy=43.3x+181.6(yisthemilli-voltofelectricalpotentialresponse,xisthelogarithmoftheconcentrationofthesubstrateofL-glutamateacid).Thecorrelationcoefficientequals0.99.Thecoefficientofvariationequals2.7%.

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简介：从有水杨酸酸和thioproline的钐氯化物hexahydrate的反应的产品，[Sm(C7H5O3)2灭牥瑡牵?慷?楦瑴摥戠?敬獡?煳慵敲?敭桴摯?慂敳?湯琠敨映瑩整?潰祬潮業污?桴?浳潯桴摥栠慥?慣慰楣楴獥愠摮琠敨浲摯湹浡捩映湵瑣潩獮漠?桴?潣灭畯摮爠汥瑡癩?潴琠敨猠慴摮牡?敲敦敲据?整灭牥瑡牵?????眠牥?慣'褯N瑡摥愠摮琠扡汵瑡摥愠?‵?湩整癲污?吠敨挠湯瑳湡?潶畬敭攠敮杲?景挠浯畢瑳潩?景琠敨挠浯潰湵?瑡吠企??‵?慷?敭獡牵摥戠??牰'酞洕?硯杹湥戭浯?潣扭獵楴湯挠污牯浩瑥牥愠?啣????7敢?敤楬敶敲?景？

简介：为由用在没有溶剂的状况下面的三聚氰胺甲醛树脂(MFR)上的支持的硫的酸的aldoxime的脱水的nitriles的合成的一个简单、方便的过程被开发了。许多芳香、脂肪族的aldoximes被变换成相应nitriles。树脂为随后的反应被恢复并且再使用。

简介：Anovelgrapheneoxidedopedpoly(hydroxymethylated-3,4-ethylenedioxythiophene)(PEDOT-MeOH/GO)compositefilmwassynthesizedandutilizedasanefficientelectrodematerialforsimultaneousdetectionofrutinandascorbicacid(AA).PEDOT-MeOH/GOfilmsweresynthesizedonglassycarbonelectrode(GCE)byafacileone-stepelectrochemicalapproachandwerecharacterizedbyscanningelectronmicroscopy,UV-Visspectroscopy,FTIRspectraandelectrochemicalmethods.ThenthePEDOT-MeOH/GO/GCEwasappliedsuccessfullyinthesimultaneousdetectionofrutinandAA.TheresultsshowedthattheoxidationpeakcurrentsofrutinandAAobtainedatthePEDOT-MeOH/GO/GCEweremuchhigherthanthoseatthetraditionalconductingpolymerPEDOT/GO/GCE,PEDOT-MeOH/GCE,PEDOT/GCEandbareGCE.Underoptimizedconditions,thelinearrangesforrutinandAAare20nmol/L-10μmol/Land8μmol/L-1mmol/L,respectively.Thedetectionlimitis6nmol/Lforrutinand2μmol/LforAA(S/N=3),whicharelowerthanthoseofthereportedelectrochemicalsensors.

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简介：为新奇分子的clefts的合成的一个快速、安全、有效的方法基于deoxycholic被报导。七新分子的clefts在好收益被综合了(8998%)。这个方法证明了极其简单、高度有效。这些受体的结构被1HNMR，红外，MS系列和元素的分析证实。

简介：TheL-proline-functionalizedpolystyrenewith1-methyldecylenespacerwassynthesizedfrom2%divinylbenzene-crosslinkedpolystyrenegelvia10-bromo-1-methyldecylpolystyreneintermediate.Aftercomplexedwithcopper(Ⅱ）ion,thepolymerwithL-prolineligandwasusedasthechiralstationaryphase(CSP)forligandexchangechromatographyofaminoacidracemates.TheresultsshowedthattheCSPpossessedpowerfulenantioselectivityandallracematesofthefifteentriedaminoacidswerecompletelyseparated.

简介：Carbondioxidetransformationtofuelsorchemicalsprovidesanattractiveapproachforitsutilizationasfeedstockanditsemissionreduction.Herein,wereportagas-phaseelectrocatalyticreductionofCO_2inanelectrolyticcell,constructedusingphosphoricacid-dopedpolybenzimidazole(PBI)membrane,whichallowedoperationat170°C.Pt/CandPtMo/CwithvariableratioofPt/Mowerestudiedasthecathodecatalysts.TheresultsshowedthatPtMo/CcatalystssignificantlyenhancedCOformationandinhibitedCH_4formationcomparedwithPt/Ccatalyst.CharacterizationbyX-raydiffraction,X-rayphotoelectronspectroscopyandtransmissionelectronmicroscopyrevealedthatmostMospeciesexistedasMoO_3inPtMo/CcatalystsandtheinteractionbetweenPtandMoO_xwaslikelyresponsiblefortheenhancedCOformationratealthoughthesebicomponentcatalystsingeneralhadalargerparticlesizethanPt/Ccatalyst.