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Thalliumisatoxicmetal.Becauseitsconcentrationinenvironmentalandbiologicalsam plesisinthe 1ng/grangeorless[1] ,itisdifficulttodeterminethemetalbyusingconventionalelectroanalysismethods .Differentialpulseanodicstrippingvoltammetry(DPASV )isasensitivemethodfor… 相似文献
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HuperzineA(HupA),analkaloidisolatedfromChineseherbHuperziaserrataThunb[1],isapotentreversibleacetylcholinesterase(AChE)inhibitor[2]withhighefficacyandlowtoxicity(fig.1).Acetylcholine(ACh)isachemicalsubstance,whichcantransmitthesignalofnerveimpulse.Therearemany… 相似文献
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1 INTRODUCTIONSolid stateboratesexhibitavarietyofphysicalandchemicalfeatures,rangingfromnonlinearopticalpropertiesof β BaB2 O4(β BBO) [1 ] tothecatalyticactivityofCu2 Al6B4O1 7[2 ] ,whichhaveattractedgreatattentionofmanyscientificresearchers.Aspartofourefforttosynt… 相似文献
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StudiesonaNewSystemofLithiumFastIonConductorsBasedonKaoliniteandLiZr2(PO4)3HUANGJian-dong**,LINBin,WANGWen-ji(DepartmentofCh... 相似文献
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Z. L. Zhang H. S. Hong J. L. Zhou ** M. H. Dai K. Maskaouib W. Q. Chen . Department of Environmental Science Engineering Tsinghua POPs Research Centre Tsinghua University Beijing China . Key Laborator 《高等学校化学研究》2002,(2)
IntroductionManyorganochlorinepesticideswereusedonaglobalscalefromthe 195 0stothemid 80s .Becauseoftheirstabilityand persistenceintheenvironment,theyarefrequentlyreferredtoasthepersistentorgan icpollutants(POPs) [1] .Thesechemicalsarebioaccu mulativeinnature ,ca… 相似文献
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BasedonthecrystalstructuredatafromXrayanalysis[1,2]andthespectralpropertiesofeachchromophoreofCPC[3,4],Sauerandcoworkers[5,6]expectedthatthedynamicsofenergytransferprocessesshouldtakeplacewithin10—30pstimescalebetweentwotrimersofCPChexamer.Furthermore,Zhaoandco… 相似文献
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Theelectricalconductivity(σ)ofpolyaniline(PAn)dopedwithinorganicprotonicacidsisabout10S/cmandσ(T)∝exp[-(T0/T)1/2].Itmeansthatσincreaseswithincreasingtemperatureandthetransportpropertyisinaccordancewiththevariablerangehopping(VRH)model[1].Afterstretching,theHCldop… 相似文献
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Horseradishperoxidase(HRP)canstronglycatalyzethereactionofH2O2oxidizingophenylenediamine(OPD),thechromaticproductofwhichcanbedetectedinenzymelinkedimmunosorbentassay(ELISA)withspectrophotometry[1].Involtammetricenzymelinkedimmunoassay[2—4],OPDH2O2HRPsystemhasf… 相似文献