Complete conversion of L-lactate into D-lactate. A generic approach involving enzymic catalysis, electrochemical oxidation of NADH and electrochemical reduction of pyruvate

1992 ◽  
Vol 114 (3) ◽  
pp. 893-897 ◽  
Author(s):  
Azz Eddine Biade ◽  
Christian Bourdillon ◽  
Jean Marc Laval ◽  
Gilles Mairesse ◽  
Jacques Moiroux
Keyword(s):  
Electrochemical Reduction ◽  
Electrochemical Oxidation ◽  
Complete Conversion

Electrochemical and biological oxidation of 1,4-dihydropyridine derivatives

1981 ◽  
Vol 46 (5) ◽  
pp. 1141-1147 ◽  
Author(s):  
Antonín Kurfürst ◽  
Jiří Ludvík ◽  
Pavel Rauch ◽  
Miroslav Marek
Keyword(s):  
Electrochemical Reduction ◽  
Nitro Group ◽  
Electrochemical Oxidation ◽  
Respiratory Chain ◽  
Enzyme System ◽  
Biological Oxidation ◽  
Common Trends ◽  
Cyclic Voltametry ◽  
Dihydropyridine Derivatives

Electrochemical oxidation of 1,4-dihydropyridines I-XII and electrochemical reduction of the nitro group of 4-(2-nitrophenyl)-1,4-dihydropyridines III, VI, IX and XII was studied using cyclic voltametry. When comparing the electrochemical and the biological oxidation of 3,5-dimethoxycarbonyl-2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine (IX, Nifedipine) and related 1,4-dihydropyridines it was found that in spite of certain common trends the oxidation of these compounds (I-XII) in the organism cannot be predicted unambiguously. Of the substances tested compounds IX and XI (3,5-diethoxycarbonyl-4-phenyl-2,6-dimethyl-1,4-dihydropyridine) were the least oxidizable by the respiratory chain, and at the same time they did not inhibit this enzyme system. In addition to this, compound IX was the least oxidizable by the microsomal system.

Remarkable increase in luminol electrochemiluminescence by sequential electroreduction and electrooxidation

2014 ◽  
Vol 50 (93) ◽  
pp. 14662-14665 ◽  
Author(s):  
Xiaoyun Liu ◽  
Wenjing Qi ◽  
Wenyue Gao ◽  
Zhongyuan Liu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Electrochemical Oxidation ◽  
Linear Sweep Voltammetry ◽  
Sensitive Detection ◽  
Linear Sweep ◽  
Remarkable Increase

Luminol electrochemiluminescence is dramatically increased by about five hundred times by coupling electrochemical reduction and electrochemical oxidation using simple linear sweep voltammetry, enabling sensitive detection.

Coulometry in resonator cavity of EPR spectrometer: Electrochemical oxidation of carbazole methyl derivatives

1981 ◽  
Vol 46 (1) ◽  
pp. 40-47 ◽  
Author(s):  
Pavel Kubáček
Keyword(s):  
Electrochemical Reduction ◽  
Electrochemical Oxidation ◽  
Electrode Surface ◽  
Cation Radical ◽  
Radical Product ◽  
Spin Concentration ◽  
Resonator Cavity ◽  
Methyl Derivatives ◽  
Simultaneous Measuring ◽  
Radical Character

Electrochemical reduction of carbazole, 3-methyl- and 3,9-dimethylcarbazole in acetonitrile leads to the formation of a layer of conductive, insoluble products on the electrode surface of a partially radical character. This phenomenon was studied by coulometry in the resonator cavity of an EPR spectrometer with simultaneous measuring of the spin concentration. With carbazole and 3-methylcarbazole, the radical particles are formed with a yield of about 2% with respect to the current passed, whereas with 3,9-dimethylcarbazole this yield is by an order or magnitude lower. The radical product adsorbed on the electrode is probably a sparingly soluble perchlorate of the cation radical of 3,3'- or 6,6'-bicarbazole. 3,6,9-Trimethylcarbazole gives on oxidation a relatively stable primary cation radical. Electrochemical oxidation of 9-methyl- and 3,6-dimethylcarbazole does not lead to radical products.

In Situ X-Ray Absorption Studies of the Electrochemical Reduction of Hydroxocobalamin

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-619-C2-620 ◽  
Author(s):  
M. Giorgett ◽  
I. Ascone ◽  
M. Berrettoni ◽  
S. Zamponi ◽  
R. Marassi
Keyword(s):  
Electrochemical Reduction ◽  
X Ray ◽  
Absorption Studies ◽  
X Ray Absorption

Lateral Adsorbate Interactions Inhibit HCOO- While Promoting CO Selectivity for CO2 Electrocatalysis on Ag

2018 ◽  
Author(s):  
Divya Bohra ◽  
Isis Ledezma-Yanez ◽  
Guanna Li ◽  
Wiebren De Jong ◽  
Evgeny A. Pidko ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Experimental Approach ◽  
Decisive Role ◽  
Experimental Methods ◽  
Reaction Intermediates ◽  
Intermediate Species ◽  
Experimental Knowledge ◽  
Complex Interactions ◽  
Ag Catalysts

<p>The analysis presented in this manuscript helps bridge an important fundamental discrepancy between the existing theoretical and experimental knowledge regarding the performance of Ag catalysts for CO<sub>2</sub> electrochemical reduction (CO<sub>2</sub>ER). The results demonstrate how the intermediate species *OCHO is formed readily en-route the HCOO<sup>– </sup>pathway and plays a decisive role in determining selectivity of a predominantly CO producing catalyst such as Ag. Our theoretical and experimental approach develops a better understanding of the nature of competition as well as the complex interactions between the reaction intermediates leading to CO, HCOO<sup>–</sup> and H<sub>2</sub> during CO<sub>2</sub>ER.</p><p><br></p><p>Details of computational and experimental methods are present in the Supporting Information provided. </p><p><br></p><p><br></p>

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