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  1. 原著論文

XANES spectral changes of hydrated deoxyribose induced by K-shell ionization of oxygen

https://repo.qst.go.jp/records/49599
https://repo.qst.go.jp/records/49599
d5b7c498-2e24-45d9-bb53-07f48c644e40
Item type 学術雑誌論文 / Journal Article(1)
公開日 2019-02-12
タイトル
タイトル XANES spectral changes of hydrated deoxyribose induced by K-shell ionization of oxygen
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
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 藤井, 健太郎

× 藤井, 健太郎

WEKO 501070

藤井, 健太郎

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横谷, 明徳

× 横谷, 明徳

WEKO 501071

横谷, 明徳

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藤井 健太郎

× 藤井 健太郎

WEKO 501072

en 藤井 健太郎

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横谷 明徳

× 横谷 明徳

WEKO 501073

en 横谷 明徳

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抄録
内容記述タイプ Abstract
内容記述 We investigated the initial process of DNA strand breakage induced by ionizing radiation by recording XANES spectra of hydrated deoxyribose (dR) films before and after K-shell ionization of oxygen. The experiments were performed
on beamline BL23SU at SPring-8, Japan. The hydrated dR films were prepared by exposing the cooled dR film surface to water vapor. The XANES spectra were then obtained by measuring the sample drain current. The soft X-ray irradiation treatment led to an increase in the intensity of the s*(C=O) peak (around 532 eV) and a decrease in the intensity of the s*(C–O) peak around 538 eV). Furthermore, a characteristic peak was observed at around 534–536 eV in the hydrated dR film after irradiation. This peak, which was ascribed to a newly formed carboxyl group, was not observed in the XANES
spectrum of the dry dR film after irradiation. This carboxyl group was considered to originate from the reaction of a nearby water molecule with the carbonyl group produced by the direct ionization of dR. This structure may
be formed at the strand-break termini of DNA after radiation damage. Therefore, waters of hydration may play a protective role against irreparable
strand breakage.
書誌情報 AIP Conference Proceedings

巻 2054, p. 040005, 発行日 2019-01
出版者
出版者 American Institute of Physics
DOI
識別子タイプ DOI
関連識別子 10.1063/1.5084606
関連サイト
識別子タイプ URI
関連識別子 https://aip.scitation.org/doi/pdf/10.1063/1.5084606
関連名称 https://aip.scitation.org/doi/pdf/10.1063/1.5084606
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