کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
178993 | 459330 | 2014 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Cyclic voltammetric and nanogravimetric studies of NADP+ redox transformations on a yeast-modified platinum electrode Cyclic voltammetric and nanogravimetric studies of NADP+ redox transformations on a yeast-modified platinum electrode](/preview/png/178993.png)
• Preparation of a yeast-modified electrode
• Application of a yeast-modified electrode for the quantitative determination of NADP+
• Reversible voltammetry of NADP+
• Surface mass changes during the cyclic voltammetry of NADP+
The dominant voltammetric response of a yeast suspension in neutral or slightly alkaline media can be assigned to the redox transformations of nicotinamide adenine dinucleotide (NAD+/NADH) and nicotinamide adenine dinucleotide phosphate (NADP+/NADPH). By immobilization of yeast on platinum, a stable electrode can be prepared which shows an electrocatalytic activity towards the reduction of NADP+ and the reoxidation of the product formed. Reversible cyclic voltammetric responses were obtained. The peak currents depend practically linearly on the NADP-Na2 concentration and on the square root of the scan rate. The surface mass changes accompanying the redox transformations were monitored by an electrochemical quartz crystal nanobalance.
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Journal: Electrochemistry Communications - Volume 45, August 2014, Pages 9–12