简介：Combinedwithflow-injection(Fl)technology,asimplechemiluminescence(CL)methodwasdevelopedforhydrazinedeterminationinthispaper.ItwasfoundthathydrazinecouldgreatlydecreasethestrongCLsignalproducedbythereactionbetweenluminolandhexacyanoferrate(Ⅲ)inalkalinemedium.ThedecreasedCLintensitywaslinearwithhydrazineconcentrationintherangeof5.0×10-9gmL-1to4.0×10-5gmL1,andthelimitofdetectionwas2.0×10-9gmL-1(3σ)witharelativestandarddeviationof2.4～4.1%(n=5).

简介：Thesecond-ordernonlinearoptical(NLO)propertiesofaseriesofbenzothiazolederivativeswerestudiedbyuseoftheZINDO-SOSmethod.Thesechromophoresareformedbyadonor-π-bridge-acceptorsystem,basedonanitrogroupconnectedwithbenzothiazoleastheacceptorandahydroxyl-functionalaminogroupasthedonor.Forthepurposeofcomparison,wealsodesignedmoleculesinwhichnitrobenzeneisanacceptor,Thecalculationresultsindicatethatbenzothiazolederivativesexhibitlargersecond-odrderpolarizabilitiesthannitrobenzenederivatives.InordertoclarifytheoriginoftheNLOresponseofthesechromophores,theirelectronpropertieswereinvestigatedaswell.Thebenzothiazolederivativesaregoodcandidatesforapplicationinelectro-opticaldeviceduetotheirhighopticalnonlinearities,goodthermalandphotonicstability.

简介：在低CTAB集中的血红素(Hb)的性质上的cetyltrimethylammonium溴化物(CTAB)的效果被紫外力的光谱，荧光，希腊语的第六个字母潜力，电导率和否定染色的传播电子显微镜(TEM)的方法在Hb/acyclovir/CTAB系统学习。随CTAB集中，在276nm的紫外山峰紧张，内在的荧光，Hb的希腊语的第六个字母潜力和系统的增加，电导率都被提高。Hb容易被氧化到oxyHb和hemichrome。在Hb/acyclovir/CTAB，Hb的系统，成为紫外力的光谱的CTAB，荧光，电导率和符合构造趋于原来的Hb被还给那些但是不那么做的希腊语的第六个字母潜力。Hb-acyclovir建筑群的紫外吸收山峰消失了，并且acyclovir引起的Hb的紧密的结构是refolded。当CTAB集中比5高时；

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简介：Heparinhasbeenconsideredtobeapotentiallyusefulligandforlow-densitylipoprotein(LDL)detectionandanalysisinaclinicalcontext.InordertoconstructanaffinitysurfaceforpreferentialadsorptionofLDL,heparin-modifiedgoldsurface(GS-Hep)wasfabricatedbyaself-assemblingmethodandhydrophobic-modifiedgoldsurfaces(GS-Hydro)wasusedasacontrol.Themorphologiesofthemodifiedgoldsurfaceswereinvestigatedbyatomicforcemicroscopy(AFM)andthequantityofheparinboundtogoldsurfacewasassayedbythetoluidineblue(TB)colorimetricmethod.WatercontactanglesweredeterminedtoinvestigatewettabilityonGS-HepandGS-Hydro.Surfaceplasmonresonance(SPR)techniquewasusedsubsequentlytodetecttheselectivebindingofLDLwithheparin.AndtheinvestigationontheeffectofpHonLDLadsorptionsuggeststhatlowerpHleadtohigherquantitiesofLDLadsorptiononGS-Hep.ComparedwithGS-Hydro,GS-HepisselectiveforLDLfrombothsingleandbinaryproteinsolutions.Moreover,adsorbedLDLonGS-Hepcouldbewashedoffbyinjectingelutionsolution,suchasNaClsolution,forthepurposeoftheregenerationofGS-HepforfurtherLDLadsorption.

简介：Thepolyoxometalate-imidazoleionicliquids(POM-ILs)withlowmeltingpointsat94.5and95.5°C,[Cnmim]4[Mo8O26](Cnmim=1-alkyl-3-methylimidazolium,n=12,14),havebeensuccessfullysynthesizedandcharacterizedbyDSC,single-crystalX-raydiffractionandTGA,etc.ThetwoPOM-ILshaverelativelyhighstabilitywithdecomposingtemperatureuptoabout347and344°C,respectively.FurtherphotocatalyticperformancewasmeasuredviathedegradationofrhodamineB(RB)inaqueoussolution.Theexperimentsshowthattheconversionreachedto90%after90minunderUV-lightandthedegradationefficiencydependedonpHvalue,differentdosagesandsoon.Inaddition,thecatalystscanberecycledforseveraltimeswithoutsignificantlossofactivity.

简介：TheadsorptionanddiffusionofNatomsonthethreelow-indexCuplaneswerestudiedusing5-parameterMorsepotential(5-MP)method,andthebesttheory-experimentagreementwasobtained.NatomsofCu(100)surfacesitonthefourfoldhollowsitewiththeverticalheightof0.018nmcloselycoplanarwiththetopmostcopperlayer,andthefourCu-Nbondlengthsare0.182nmandthefifthCu-Ndistanceis0.199nm.ForCu(111)system,theexistenceofaberrantCu(100)reconstructedstructureisapprovedathighercoverage,andatlowcoveragethestructureisalmostanidealCu(111)surfacestructure.WithrespecttoCu(110)system,theNatomsareadsorbedatLBandH3sites,notatSBsite.ThediffusionpassageanddiffusionbarrierofadsorbedNatomswerealsostudied.

简介：

简介：Twenty10-hydrocarbylacridonesand2-methylacridone,1-hydroxyacridoneweresynthesizedfromacridoneandcharacterizedbymp,IR,UV,1HNMRandMS.UsingNd:YAGasalasersource,thesecond-orderharmonicgeneration(SHG)valuesoftheacridonederivativesweremeasuredinpowderstateascomparedwithureapowder.TheresultsshowedthattheSHGvaluesofsomeof10-hydrocarbylacridoneswerehigherthanthatofurea,whileotherswerelower.Althoughthehydrocarbylsubstituents(R)attachedtonitrogenatomofacridoneweredifferentinsizeandelectronegativity,theyhadalittleeffectontheSHGvaluesof10-hydrocarbylacridones.Substituents,suchasmethylorhydroxygroupconnectedtothephenylring,causedalittleeffectontheSHGvalues,too,comparedwithacridone.TheabilityofRtopushelectrontowardthenitrogenatomortopullelectronfromthenitrogenatomplayanimportantroleonthemaximumwavelengthesofUV-visibleabsorptionofacridonederivatives.

简介：Fourcoumarinderivatives(4a―4d)withdifferentalkoxychainsweresynthesized.Itwasfoundthatcompound4dshowedabettergelationabilitythantheothercompounds,forexample,itcouldself-assembleintoorganogelsinvariousorganicfluidsviaultrasoundtreatmentorheating-coolingprocess,whereascompound4ccouldonlygelinafewmixedsolventsandcompounds4a,4bcouldnotformorganogel.TheresultsfromfluorescentandFT-IRspectraindicatethatπ-πinteractionhadaneffectontheformationoftheorganogelsofcompound4dbesidesH-bondingandvanderWaalsinteraction,whichwerethedrivingforcesfortheself-assemblingofcompound4cingelstate.Thegelofcompound4dintoluenecouldemitstrongfluorescenceunderUVirradiationandthe[2+2]cyc-lo-additionwassuggestedby1HNMRandfluorescencespectroscopy.Thislight-sensitiveorganogelmightfindapplicationinopticalmaterials.

简介：Thisstudyaimsattheeffectsofanintakeoflowmolecularweightcornpeptides(LMCPs)preparedfromzeinonalcoholmetablisminrats.LMCPs(1.0g/kgbodyweight)in15%ethanol(10mL/kgbodyweight)weregiventoWisterratsbyintragastricgavage.Theassayofbloodethanolwasconductedbyusingtheenzyme-basedassaykit.Theaminoacidanalysiswasmadewithanaminoacidanalyzer.ThedataoftheanimalexperimentsshowedthatLMCPscouldacceleratethemetabolismofalcoholinrats.Inthecontrolgroup,thebloodethanolconcentrationreachedthemaximumlevelof(827.0±77.3)mg/Lafterethanolloadingfor30min,thengraduallydecreased.Incontrast,thebloodethanolconcentrationonlyreached(527.25±47.0)mg/Lafter30mininthegroupofLMCPstaken.TheseresultsindicatethatLMCPscoulddecreaseethanolconcentrationinbloodrapidly.

简介：Ashortandfacilesynthesisofaseriesof1,2-dihydroquiazolin-4(3H)-oneswasaccomplishedingoodyieldsvianovelreductivecyclizationofo-nitrobenzamideswithketonespromotedbyTiCI4/Znsystem.Thestructurewasestablishedonthebasisofelementalanalysis,IR,^1HNMRandconfirmedbyasingle-crystalX-raydiffractionanalysis.Thismethodhastheadvantagesofeasilyaccessiblestartingmaterials,convenientmanipulationandmoderatetohighyields.

简介：Time-dependentdensity-functionaltheory(TDDFT)hasbeenappliedtocalculatetheelectronicstructureandsecond-ordernonlinearoptical(NLO)propertiesofsomeorganicmolecules.Thetwo-dimensional(2-D)chargetransfercharateristicsofcalculatedmoleculeswerestudiedandcomparedwithcorrespondingexperimentalresults.Allthetheoreticalresultsagreewellwiththemeasurement.For2-Dmoleculewithtwo-foldsymmetry,thedominantchargetransferisoff-diagonal,whileforthree-foldsymmetry2-Dmolecule,thedominantchargetransferisnotonlybetweenbranchesandcentralgroupbutalsoamongbranches.

简介：gramine(C11H14N2)的低温度的热能力被精确测量在从78～401K的温度范围上的自动化断热的热量计。温度的功能被最少的广场方法适合的热能力的一个多项式方程。相对标准参考温度基于适合的多项式，弄平的热能力和混合物的热力学的功能298.15K在5K间隔被计算并且公布。在T=298.15K的混合物的燃烧的经常卷的精力被精确氧炸弹燃烧热量计作为cU=测量(35336.7

简介：Bytheadditionalreactionofbinuclearcompounds(Me4N)2M2S4(TDT)2(M=Mo,W;H2TDT=H2CH3C6H3S2)withmononuclearcuprouscomplex,twonewM-Cu-SclustersMo2Cu2S4(TDT)2-(PPh3)2·CH3CH2OH(1)andW2Cu2S4(TDT)2(PPh3)2·0.5CH3CH2OH-0.5H2O(2)havebeenpreparedandcharacterizedbyIR,UV-Vis,31PNMRspectroscopy,cyclicvoltammetryandsinglecrystalX-raystructureanalysis.BothcompoundscrystallizeinspacegroupP21/nwithlatticeparametersa=1.0956(3),b=2.2072(3),c=2.4340(3)nm,β=100.36(2)°,V=5.790(3)nm3andZ=4for1anda=1.0965(9),b=2.2135(3),c=2.4317(4)nm,β=99.63(8)°,V=5.819(8)nm3andZ=4for2.Bothmolecularstructurescontainacubane-likeclustercore[M2Cu2S4](M=Mo,W)andtheirskeletonsarealmostthesameexceptforMatoms.Thesyntheses,structuresandspectrumcharacterizationsofthesetwoclustersarediscussed.Thethird-ordernonlinearoptical(NLO)propertyofthetwoclusterswasstudiedbythetechniqueofforwarddegeneratefour

简介：HighactiveandstablegoldcatalystssupportedoncrystallineFe2O3andCeO2/Fe2O3werepreparedviathedeposition-precipitationmethod.ThecatalystwithaAuloadof1.0%calcinedat180°CshowedaCOconversionof100%at-8.9°C,whileAu/CeO2/Fe2O3convertedCOcompletelyat-16.1°C.Evenhavingbeencalcinedat500°C,Au/Fe2O3stillexhibitedsignificantcatalyticactivity,achievingfullconversionofCOat61.6°C.ThecatalystwithalowAuloadof0.5%couldconvertCOcompletelyatroomtemperatureandkepttheactivityunchangedforatleast150h.N2adsorption-desorptionmeasurementsshowthatthecrystallinesupportspossessedahighspecificsurfaceareaofabout200m2/g.CharacterizationsofX-raydiffractionandtransmissionelectronmicroscopyindicatethatgoldspecieswerehighlydispersedasnanoorsub-nanoparticlesonthesupports.Evenafterthecatalystwascalcinedat500°C,theAuparticlesremainedinanano-sizeofabout6―10nm.X-rayphotoelectronspectrarevealthatthesupportedAuexistedinmetallicstateAu0.ThemodificationofAu/Fe2O3byCeO2provedtobebeneficialtotheinhibitionofcrystallizationofFe2O3andthestabilizationofgoldparticlesindispersedstate,consequentlypromotingcatalyticactivity.

简介：Wehavesuccessfullydemonstratedthathighqualityandhighdielectricconstantlayerscanbefabricatedbylowtemperaturephoto-inducedor-assistedprocessing.Ta2O5andZrO2havebeendepositedatt＜400℃bymeansofaUVphoto-CVDtechniqueandHfO2byphoto-assistedsol-gelprocessingwiththeaidofexcimerlamps.TheUVannealingofas-grownlayerswasfoundtosignificantlyimprovetheirelectricalproperties.Lowleakagecurrentdensitiesontheorderof10-8A/cm2at1MV/cmfordepositedultrathinTa2O5filmsandca.10-6A/cm2forthephoto-CVDZrO2layersandphoto-irradiatedsol-gelHfO2layershavebeenreadilyachieved.TheimprovementintheleakagepropertiesoftheselayersisattributedtotheUV-generatedactiveoxygenspeciesO(1D)whichstronglyoxidizeanysuboxidestoformmorestoichiometricoxidesonremovingcertaindefects,oxygenvacanciesandimpuritiespresentintheas-preparedlayers.Thephoto-CVDTa2O5filmsdepositedacross10.16-cmSiwafersexhibitahighthicknessuniformitywithavariationoflessthan±2.0%beingobtainedforultrathinca.10nmthickfilms.Thelamptechnologycaninprinciplebeextendedtolargerareawafers,providingapromisinglowtemperatureroutetothefabricationofarangeofhighqualitythinfilmsforfutureULSItechnology.