Investigation of Coenzyme Q[10] by Voltammetry

A simple, accurate and rapid voltammetric method has been developed for the quantitative determination of coenzyme Q[10]. Studies with direct current voltammetry were carried out using a glassy carbon electrode (GCE) in a phosphate buffer solution (pH 6.86). A well-defined oxidation peak of CoQ[10] was obtained at -0.600 V vs Ag/AgCl. The magnitude of the oxidation peak current has been found to be related to the concentration of the coenzyme over the range of (2.0x10{-5} to 2.0x10{-4} M) (r=0,991). Antioxidant activity of CoQ[10] was investigated

Fluorescence Analysis of E. coli Bacteria in Water

The fluorescence analysis of Escherichia coli (E. coli) bacteria was done. It has been established that a luminescent signal from the one of metabolites (reduction form of nicotinamide adenine dinucleotide, NADH) can be adopted as a vitality indicator of the bacteria. This signal was chosen as an analytical signal. It was determined that the nature of this signal is fluorescence. In order to eliminate influence of the light scattering on this fluorescence signal optimal conditions were chosen