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1.
Thalliumisatoxicmetal.Becauseitsconcentrationinenvironmentalandbiologicalsam plesisinthe 1ng/grangeorless[1] ,itisdifficulttodeterminethemetalbyusingconventionalelectroanalysismethods .Differentialpulseanodicstrippingvoltammetry(DPASV )isasensitivemethodfor…  相似文献   

2.
HuperzineA(HupA),analkaloidisolatedfromChineseherbHuperziaserrataThunb[1],isapotentreversibleacetylcholinesterase(AChE)inhibitor[2]withhighefficacyandlowtoxicity(fig.1).Acetylcholine(ACh)isachemicalsubstance,whichcantransmitthesignalofnerveimpulse.Therearemany…  相似文献   

3.
1 INTRODUCTIONSolid stateboratesexhibitavarietyofphysicalandchemicalfeatures,rangingfromnonlinearopticalpropertiesof β BaB2 O4(β BBO) [1 ] tothecatalyticactivityofCu2 Al6B4O1 7[2 ] ,whichhaveattractedgreatattentionofmanyscientificresearchers.Aspartofourefforttosynt…  相似文献   

4.
ActaBiochimicaetBiophysicaSinicaChineseJournalofStructuralChemistryActaBotanicaSinicaChineseLawandGovernmentActaChimicaSinicaChineseLiteratureActaGeologicaSinica(EnglishEdition)ChineseMedicalJournalActaMathermaticaSinica(NewSeries)ChinesePhysicsLetters…  相似文献   

5.
ActaBiochimicaetBiophysicaSinicaChineseJournalofStructuralChemistryActaBotanicaSinicaChineseLawandGovernmentActaChimicaSinicaChineseLiteratureActaGeologicaSinica(EnglishEdition)ChineseMedicalJournalActaMathermaticaSinica(NewSeries)ChinesePhysicsLetters…  相似文献   

6.
StudiesonaNewSystemofLithiumFastIonConductorsBasedonKaoliniteandLiZr2(PO4)3HUANGJian-dong**,LINBin,WANGWen-ji(DepartmentofCh...  相似文献   

7.
IntroductionManyorganochlorinepesticideswereusedonaglobalscalefromthe 195 0stothemid 80s .Becauseoftheirstabilityand persistenceintheenvironment,theyarefrequentlyreferredtoasthepersistentorgan icpollutants(POPs) [1] .Thesechemicalsarebioaccu mulativeinnature ,ca…  相似文献   

8.
BasedonthecrystalstructuredatafromXrayanalysis[1,2]andthespectralpropertiesofeachchromophoreofCPC[3,4],Sauerandcoworkers[5,6]expectedthatthedynamicsofenergytransferprocessesshouldtakeplacewithin10—30pstimescalebetweentwotrimersofCPChexamer.Furthermore,Zhaoandco…  相似文献   

9.
Theelectricalconductivity(σ)ofpolyaniline(PAn)dopedwithinorganicprotonicacidsisabout10S/cmandσ(T)∝exp[-(T0/T)1/2].Itmeansthatσincreaseswithincreasingtemperatureandthetransportpropertyisinaccordancewiththevariablerangehopping(VRH)model[1].Afterstretching,theHCldop…  相似文献   

10.
Horseradishperoxidase(HRP)canstronglycatalyzethereactionofH2O2oxidizingophenylenediamine(OPD),thechromaticproductofwhichcanbedetectedinenzymelinkedimmunosorbentassay(ELISA)withspectrophotometry[1].Involtammetricenzymelinkedimmunoassay[2—4],OPDH2O2HRPsystemhasf…  相似文献   

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