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Abstract

The behaviour of electrochemical oxidation of the reduced nicotinamide coenzyme NADH on glassy carbon was studied and some kinetic parameters were measured by means of voltammometry in the N-dimethylformamide(DMF)and 1,4-dioxane media respectively. The eletrochemical oxidation of NADH shows completely irriversable both in the two solvents,and the diagnostic experiments support that the process involves a fast chemical step.The oxidation rate and the diffusion coefficient of N ADH in DMP are smaller than those in 1,4-dioxane,but the response current is more stable in DMF. The experimental results are discussed by solvent effects.

Keywords

NADH, Electrochemical oxidation, organic phase enzymology, bioeletrochemistry

Publication Date

1996-08-28

Online Available Date

1996-08-28

Revised Date

1996-08-28

Received Date

1996-08-28

References

1DryhurstG.ElectrochemistryofBilolgicalMolecules.NewYork:AcademicPress,1977:5442BartlettPN,TebbuttandWhitakerRG.Kineticaspectsoftheuseofmodifiedelectrodesandmodiatorsinbioelectrochemistry.ProgressinReactionKinetics,1991,16:55~1553BlaedelWJandHaasRG.ElectrochemicalOxidationofNADHAnalogs.Atial.Chem.,1970,42(8):918~9274DordickJS.Enzymaticcatalysisinmonophasicorganicsolvents.EnzymeMicrob.Technol.,1989,11:194~2115SainiS,hallGF,DownsMEA,TurnerATP.Organicphaseenzymeelectrodes.Anal.Chim.Acta,1991,249:1~156SouthamptonElectrochemistryGroup.InstrumentalMethodsinElectrochemistry.NewYork:HalstedPress,1985:178~2287ReichardtC.SolventffectsinOrganicChemistry.Weinheim:VerlagChemie,1979:263~270

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