disproportionation


Also found in: Medical, Encyclopedia, Wikipedia.
Related to disproportionation: Disproportionation reaction

disproportionation

(ˌdɪsprəˌpɔːʃəˈneɪʃən)
n
(Chemistry) chem a reaction between two identical molecules in which one is reduced and the other oxidized
Translations
Disproportionierüng
dismutation
disproporzionamento
불균등화
References in periodicals archive ?
Kazarian, Evaluating Drug Delivery with Salt Formation: Drug Disproportionation Studied in Situ by ATR-FTIR Imaging and Raman Mapping, J.
Sometimes undesired side reactions like disproportionation or [beta]-chain scission also occurs during the crosslinking process which is illustrated in Scheme 1.
lore) dietician = nutrition logician-tactician-technician-physician dismutation = oxygenation/hydrogenation disproportionation leptonic = electronic, muonic, tauonic (the three classes of lepton) luminescence = fluorescence, phosphorescence (the two main types of luminescence) patination = carbonation, oxidation (carbonation on copper/bronze, oxidation on other metals) stutter = shutter-utter (coinage, automatic camera metaphor) xenation = nonrelation visitation (from Jeff Grant; xenation (OED, rare) = sojourning as a stranger)
The SOD, one of the most important antioxidant enzymes in the antioxidant defense system, ubiquitously exists innumerous cells of animals that could catalyze the disproportionation of superoxide to molecular oxygen and peroxide, and therefore is critical for protecting the cell against the toxic products of aerobic respiration [7,25].
When a laccase oxidizes a substrate, it will lose one electron and forms usually the free radical that might further undergo oxidation or reactions of non-enzymatic kind including polymerization, hydration and disproportionation (4).
Dehydroascorbate (DHA) is always generated during the rapid disproportionation of the MDHA radical and DHA is then reduced to AsA by the action of DHAR using GSH as the reducing substrate.
To control oxides electro-magnetic properties it~s mandatory to completely understand the phenomena takingplace at the nanoscale, like charge fluctuation and disproportionation, spin symmetry breaking or local chemicalcoordination experimentally measured with atomic-resolution and directly connected with the changes in the electronic andoptical excitations spectra.
Some cloudiness from suspended elemental sulphur was observed, which is due to the disproportionation of some of the dithionite.
Hydrogen dealkylation (HDA process) yields benzene, while toluene disproportionation (TDP process) and transalkylation of toluene can be used to produce both benzene and xylene.
The Mw/Mn of these copolymers suggests a strong tendency for chain termination by disproportionation rather than radical combination.
Nevertheless, it must be known that tin may be present during the thermic treatment, due to stoichiometric reactions of disproportionation as shown by H.
The enzyme CGTase catalyses the reactions of cyclization, which form the closed rings of CDs, coupling (reverse reaction of cyclization that opens the rings) and disproportionation, in which two molecules of linear dextrins exchange segments of their chains and are converted into two other dextrins of different sizes (SZEJTLI, 1988; VAN DER VEEN et al.