Any of a series of synthetic compounds related to the weedkiller paraquat, used as redox indicators. They contain heteroaromatic cations of the general formula (C₅H₄NR)₂²⁺.
Example sentencesExamples
- The shift from a more sigmoidal plot of the binding isotherm in the case of ethidium toward a more hyperbolic plot in the case of methyl viologen demonstrates stronger versus weaker binding, respectively.
- The intermolecular interactions between the viologens and the macrocyclic molecule were investigated in a solution before photoirradiation.
- Leaves from the transformed maize plants showed enhanced tolerance to the oxidative stress induced by incubation of leaf discs in the pro-oxidant herbicide, methyl viologen.
- Methyl viologen also affects electron-transducing reactions in the endoplasmic reticulum and in mitochondria.
- The transgenic plants were also more tolerant to the oxidative damage caused by methyl viologen showing less chlorosis and less electrolyte leakage than the controls.