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Determination of sulfite radical (SO.3-) reaction rate constants by means of competition kinetics.

作者信息

Erben-Russ M, Michel C, Bors W, Saran M

机构信息

Institut für Strahlenbiologie, Gesellschaft für Strahlen- und Umweltforschung, Neuherberg, Federal Republic of Germany.

出版信息

Radiat Environ Biophys. 1987;26(4):289-94. doi: 10.1007/BF01221974.

DOI:10.1007/BF01221974
PMID:3685252
Abstract

The sulfite radical anion (SO.3-) was found to react rapidly with the flavonoid quercetin (k = 2.5 x 10(8) dm3mol-1s-1) and the carotenoids crocin (k = 1.0 x 10(9) dm3mol-1s-1) and crocetin (k = 1.5 x 10(9) dm3mol-1s-1). The reactions can easily be monitored due to the strong absorptions of the substrates and, in the case of quercetin, the formation of a strongly absorbing transient species. Using these substances, we determined by means of competition kinetics rate constants of SO.3- reactions with nucleic acid components, polyunsaturated fatty acids, and glutathione.

摘要

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本文引用的文献

1
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Plant Physiol. 1982 Oct;70(4):994-8. doi: 10.1104/pp.70.4.994.
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The cleavage of DNA by the oxygen-dependent reaction of bisulfite.
Biochem Biophys Res Commun. 1972 Jan 14;46(1):120-4. doi: 10.1016/0006-291x(72)90638-9.
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Oxidation of ascorbate and a tocopherol analogue by the sulfite-derived radicals SO3- and SO5-.亚硫酸盐衍生的自由基SO₃⁻和SO₅⁻对抗坏血酸盐和生育酚类似物的氧化作用。
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Free-radical chemistry of sulfite.亚硫酸盐的自由基化学
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5
Reactions of linoleic acid peroxyl radicals with phenolic antioxidants: a pulse radiolysis study.亚油酸过氧自由基与酚类抗氧化剂的反应：脉冲辐解研究
Int J Radiat Biol Relat Stud Phys Chem Med. 1987 Sep;52(3):393-412. doi: 10.1080/09553008714551871.