@misc{oai:repo.qst.go.jp:00070993,
 author = {Nakanishi, Ikuo and Inami, Keiko and Nomura, Shogo and Ohkubo, Kei and Kawashima, Tomonori and Mochizuki, Masataka and Fukuzumi, Shunichi and Ozawa, Toshihiko and Matsumoto, Kenichiro and 中西 郁夫 and 川島 知憲 and 松本 謙一郎},
 month = {Nov},
 note = {Ascorbic acid (AscH(2)) is an important naturally occurring, water-soluble antioxidant.  However, the detailed radical-scavenging mechanism of AscH(2) has yet to be fully clarified.  In this study, we investigated the radical-scavenging kinetics of AscH(2) and 5,6-isopropylidenen ascorbic acid (iAscH(2)) in the absence or presence of magnesium ion (Mg(2+)).  AscH(2) efficiently scavenged galvinoxyl and 2,2-diphenyl-1-picrylhydrazyl radicals (GO radical and DPPH radical, respectively) in deaerated methanol (MeOH) at 298 K.  The pseudo-first-order rate constants (k(obs)) determined for these reactions increased with increasing AscH(2) concentration to reach constant values.  The k(obs) values were significantly decreased in the presence of 0.1 M Mg(ClO(4))(2).  Similar results were obtained for the reactions of iAscH(2) with these radicals in deaerated MeOH as well as in deaerated acetonitrile (MeCN).  The detailed radical-scavenging mechanisms will be discussed based on the kinetic data obtained in this study., 19th Annual Meeting of the Society for Free Radical Biology and Medicine (SFRBM 2012)},
 title = {Radical-Scavenging Reactions of Ascorbic Acid and Its Analogue in the Presence of a Redox-Inactive Metal Ion},
 year = {2012}
}