セミキノン
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/07/13 06:19:47」(JST)
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Semiquinone (or ubisemiquinone) is a free radical resulting from the removal of one hydrogen atom with its electron during the process of dehydrogenation of a hydroquinone to quinone or alternatively the addition of a single H atom to a quinone.[1] It is highly unstable.
It is the first of two stages in reducing the supplementary form of CoQ10 ubiquinone to the active form ubiquinol.
References
- ^ Song, Y; Buettner, GR (Sep 15, 2010). "Thermodynamic and kinetic considerations for the reaction of semiquinone radicals to form superoxide and hydrogen peroxide.". Free radical biology & medicine 49 (6): 919–62. doi:10.1016/j.freeradbiomed.2010.05.009. PMC 2936108. PMID 20493944.
English Journal
- New insights of superoxide dismutase inhibition of pyrogallol autoxidation.
- Ramasarma T1, Rao AV, Devi MM, Omkumar RV, Bhagyashree KS, Bhat SV.
- Molecular and cellular biochemistry.Mol Cell Biochem.2015 Feb;400(1-2):277-85. doi: 10.1007/s11010-014-2284-z. Epub 2014 Nov 23.
- Autoxidation of pyrogallol in alkaline medium is characterized by increases in oxygen consumption, absorbance at 440 nm, and absorbance at 600 nm. The primary products are H2O2 by reduction of O2 and pyrogallol-ortho-quinone by oxidation of pyrogallol. About 20 % of the consumed oxygen was used f
- PMID 25416864
- Formation of dibenzofuran, dibenzo-p-dioxin and their hydroxylated derivatives from catechol.
- Altarawneh M1, Dlugogorski BZ.
- Physical chemistry chemical physics : PCCP.Phys Chem Chem Phys.2015 Jan 21;17(3):1822-30. doi: 10.1039/c4cp04168b. Epub 2014 Dec 4.
- We present, in this study, mechanistic and kinetic accounts of the formation of dibenzofuran (DF), dibenzo-p-dioxin (DD) and their hydroxylated derivatives (OHs-DF/OHs-DD) from the catechol (CT) molecule, as a model compound for phenolic constituents in biomass. Self-condensation of two CT molecules
- PMID 25474266
- Modified molecular interactions of the pheophytin and plastoquinone electron acceptors in photosystem II of chlorophyll d-containing Acaryochloris marina as revealed by FTIR spectroscopy.
- Sano Y1, Endo K, Tomo T, Noguchi T.
- Photosynthesis research.Photosynth Res.2015 Jan 6. [Epub ahead of print]
- Acaryochloris marina is a unique cyanobacterium that contains chlorophyll (Chl) d as a major pigment. Because Chl d has smaller excitation energy than Chl a used in ordinary photosynthetic organisms, the energetics of the photosystems of A. marina have been the subject of interest. It was previously
- PMID 25560630
Japanese Journal
- FTIR study of CPD photolyase with substrate in single strand DNA
- Similarities of artificial photosystems by ruthenium oxo complexes and native water splitting systems.
- Proceedings of the National Academy of Sciences of the United States of America 109(39), 15600-15605, 2012-09-25
- NAID 120004874014
Related Links
- Mesomeric structures of semiquinone. Noun [edit] Wikipedia has an article on: semiquinone Wikipedia semiquinone (plural semiquinones) (chemistry) An intermediate free radical generated in the conversion of quinones to/from . [] ...
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