Radical intermediates generated in the reactions of l-arginine with hydroxyl radical and sulfate radical anion: A pulse radiolysis study |
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| Affiliation: | 1. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan;2. Research Institute of Advanced Technology, University of Osaka Prefecture, Osaka 599-8570, Japan;1. Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, PR China;2. Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Tsinghua University, Beijing 100084, PR China;1. College of Veterinary Medicine, Northeast Agricultural University, No. 59 Mucai Street, Xiangfang District, Harbin 150030, China;2. Department of Neurology, The Second Affiliated Hospital, Harbin Medical University, No. 246 Xuefu Road, Nangang District, Harbin 150001, China;1. Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Zhejiang University, Hangzhou 310058, China;2. Wenzhou Medical University, Wenzhou, 325035, China |
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| Abstract: | Reactions of l-arginine (Arg) with hydroxyl radical ( OH) and sulfate radical anion (SO4−) were kinetically investigated by the pulse radiolysis technique. Hydrogen abstraction from Arg by OH afforded redox chemically oxidizing, neutral, and reducing carbon-centered Arg radicals. Kinetic properties of the radicals indicated that the reducing species might include the δ-C-centered Arg radical and CO2 radical anion. Similar transient spectra were observed in the SO4− reaction with Arg, suggesting direct oxidation at the guanidino group is less likely. |
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