redox potential


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ox·i·da·tion-re·duc·tion po·ten·tial (E0+),

the potential in volts of an inert metallic electrode measured in a system of an arbitrarily chosen ratio of [oxidant] to [reductant] and referred to the normal hydrogen electrode at absolute temperature; it is calculated from the following equation; where R is the gas constant expressed in electrical units, T the absolute temperature (Kelvin), n the number of electrons transferred, F the faraday, and E0 the normal symbol for the potential of the system at pH 0; for biologic systems, E0' is often used (in which pH = 7). Compare: Nernst equation.
Synonym(s): redox potential

redox potential

a quantitative measurement of the willingness of an electron carrier to act as a red ucing or ox idizing agent. Redox potential is measured in volts; the more negative the value, the better the carrier will act as a reducing agent. Thus, in an ELECTRON TRANSPORT SYSTEM the carriers are arranged in order of increasing redox potentials (negative to positive). For example, in Fig. 211 ferredoxin has a lower (more negative) redox potential than plastoquinone which has a higher value (less negative).
References in periodicals archive ?
To identify Cys residue(s) required for hyperoxia-induced TRPA1 activation, we individually mutated each of the 29 Cys residues in human TRPA1 to serines and tested the responsiveness of these mutants to hyperoxia as well as to diallyl disulphide, which has a redox potential similar to that of [O.
With an increase in the number of pulses a decrease in the redox potential is observed and at a certain threshold of pulses the positive redox potential is changed to negative.
Eh = measured redox potential + electrodeconstant + temperature correction factor.
The primary mouse fibroblasts used in the present study were actively proliferating and rapidly achieved an extracellular redox potential that was consistent with those observed in mice and mouse cell cultures, but that was more reducing than those observed in humans and human cell cultures.
In the current study the organic content of the sediments comes from primary production together to redox potential and depth were the only environmental variables explaining the distribution of meiofauna groups, while oxygen levels were not correlated.
So, it could be decided that higher temperature plays an important role in accelerating the redox reaction between silver ions and starch macromolecules (as suggested by redox potential data).
For both of the redox potential conditions, no significant differences were observed in the shoot, root, and total dry matter production of control plants and rice plants treated with arying barium doses (Figure 3).
However, EMD Millipore's Direct Detect is a mid-infrared (MIR)-based spectroscopy system for protein quantitation that does not rely on amino acid composition, dye-binding properties or redox potential.
The redox potential of V-RFB unit cell has been estimated and plotted using the (10).
METHODS: roGFP2, a reporter of the glutathione redox potential (EGSH), was used to monitor EGSH in cultured human airway epithelial cells (BEAS-2B cells) undergoing exposure to 0.