{"created":"2023-05-15T15:01:48.008497+00:00","id":83826,"links":{},"metadata":{"_buckets":{"deposit":"ccdde3a2-432d-47b8-8665-3b53629f7cd7"},"_deposit":{"created_by":1,"id":"83826","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"83826"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00083826","sets":["10:28"]},"author_link":["1010935","1010929","1010936","1010931","1010934","1010932","1010930","1010933"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2021-11-16","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Local concentration of hydroxyl radical (•OH) and hydrogen radicals (•H) generated in water during X-ray irradiation to aqueous reaction mixtures was quantified by an electron paramagnetic resonance (EPR) spin-trapping technique using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as a spin-trapping agent. During water radiolysis process, the •OH and •H could be generated. The G-values reported for •OH and •H are 0.28 and 0.06, respectively. It was discussed what could make this difference of yields of •OH and •H.\nA lower (0.13 mM‒2.3 M) concentration series and a 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. Signal intensities of DMPO-OH and DMPO-H caused in the sample were measured by X-band EPR spectrometer. The decay of DMPO-OH and DMPO-H during and after irradiation was corrected and the net yield was observed. The profiles observed by plotting concentrations of DMPO-OH and DMPO-H against the DMPO linear density (reciprocal of the intermolecular distance of DMPO) were analyzed.\nWhen X-ray was irradiated to DMPO aqueous solutions, DMPO-OH showed a 4-phase profile, however, DMPO-H showed a 2-phase profile. The inflection point made by 1st and 2nd phases indicates relatively sparse (mmol/L-level) generations; and the inflection point formed by 3rd and 4th phases indicates markedly dense (mol/L-level) generations of the target radicals. Both profiles observed for DMPO-OH and DMPO-H were almost overlapped except the DMPO-H lacked 3rd and 4th phases. The yields of the relatively sparse generations of both •OH and •H were estimated as 200 mmol/L/Gy. Total yields of •OH were 500 mmol/L/Gy or more, and 200 mmol/L/Gy for •H. Radiation induced •H generation is available only from sparse ionization.","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"The Society for Redox Biology and Medicine's 28th Annual Conference (SfRBM 2021)","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Matsumoto, Ken-ichiro"}],"nameIdentifiers":[{"nameIdentifier":"1010929","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Megumi, Ueno"}],"nameIdentifiers":[{"nameIdentifier":"1010930","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshimi, Shoji"}],"nameIdentifiers":[{"nameIdentifier":"1010931","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ikuo, Nakanishi"}],"nameIdentifiers":[{"nameIdentifier":"1010932","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kenichiro, Matsumoto","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1010933","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Megumi, Ueno","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1010934","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yoshimi, Shoji","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1010935","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ikuo, Nakanishi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1010936","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"Initial Molecular Geometry of Radiation-Induced Reactive Species in Water","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Initial Molecular Geometry of Radiation-Induced Reactive Species in Water"}]},"item_type_id":"10005","owner":"1","path":["28"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-09-16"},"publish_date":"2021-09-16","publish_status":"0","recid":"83826","relation_version_is_last":true,"title":["Initial Molecular Geometry of Radiation-Induced Reactive Species in Water"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T19:02:02.121248+00:00"}