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Estimation of the local concentration of the markedly dense hydroxyl radical generation induced by X-rays in water
https://repo.qst.go.jp/records/84961
https://repo.qst.go.jp/records/84961621dc548-db22-4e36-b525-eb1e29b19bfe
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
Matsumoto.K.2022.Molecules.27(3).592.pdf (3.4 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-11-24 | |||||
| タイトル | ||||||
| タイトル | Estimation of the local concentration of the markedly dense hydroxyl radical generation induced by X-rays in water | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Ken-ichiro, Matsumoto
× Ken-ichiro, Matsumoto× Ueno, Megumi× Shoji, Yoshimi× Nakanishi, Ikuo× Kenichiro, Matsumoto× Megumi, Ueno× Yoshimi, Shoji× Ikuo, Nakanishi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The density of X-ray-induced markedly dense hydroxyl radicals (•OH) in water was estimated based on EPR spin-trapping measurement using DMPO as the spin-trapping agent. A lower (0.13 mM‒2.3 M) concentration series of DMPO water solutions and higher (1.7‒4.8 M) concentration series of DMPO water solutions plus neat DMPO liquid (8.8 M as DMPO) were irradiated with 32 Gy of X-rays. Then, the yield of DMPO-OH in DMPO water solutions and the total spin-adduct of DMPO in neat DMPO were quantified. Estimating the EPR signal peak area by the line fitting method is only available for well-separated single EPR lines. For the higher concentration DMPO series, the EPR signal peak area was estimated by double integration. The baseline correction of the integral spectrum is necessary for accurate estimation of the double integration of EPR spectrum. In addition, using the suitable standard sample corresponding to the EPR sensitivity, which was variable by the electric permittivity according to DMPO concentration, was quite important for quantification of DMPO-OH especially in the higher DMPO concentration beyond 2 mM. The local density of •OH generation in water by X-ray irradiation was estimated from the inflection point on the plot of the DMPO-OH yield versus DMPO density. The density of X-ray-induced markedly dense •OH was estimated as 1184 μm-1, which was converted to 0.84 nm as the intermolecular distance and 2.8 M as the local concentration. | |||||
| 書誌情報 |
Molecules 巻 27, 号 3, p. 592, 発行日 2022-01 |
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| 出版者 | ||||||
| 出版者 | MDPI | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1420-3049 | |||||
| PubMed番号 | ||||||
| 識別子タイプ | PMID | |||||
| 関連識別子 | 35163857 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.3390/molecules27030592 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.mdpi.com/1420-3049/27/3/592 | |||||
