Reactions of Hydroxyl Radicals with Nucleic Acid Bases and the Related Compounds in Gamma-irradiated Aqueous Solution
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Rate constants for reactions of hydroxyl radicals with nucleic acid bases and the related compounds were determined by the p-nitrosodimethylaniline method. For addition reaction of hydroxyl radical to the compounds, reactivity indices, namely free valence, localization energy, frontier-electron-density and superdelocalizability, were calculated by Huckel MO method. Among the examined reactivity indices, superdelocalizability was found to have a linear correlation with logarithms of relative rate constants of pyrimidine bases, while the correlation was not observed for purine bases. Numerous studies have been published on radiation chemistry of nucleic acid constituents and the related compounds, because of their significance in radiationinduced damage to biological systems.
- 日本放射線影響学会の論文
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