{"created":"2023-05-15T15:14:54.027657+00:00","id":360,"links":{},"metadata":{"_buckets":{"deposit":"ceb8ac38-a3a0-4eb1-a835-d6308c08a05c"},"_deposit":{"created_by":12,"id":"360","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"360"},"status":"published"},"_oai":{"id":"oai:obihiro.repo.nii.ac.jp:00000360","sets":["5"]},"author_link":["890","891","317"],"item_2_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2005-10-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"54","bibliographicPageStart":"43","bibliographicVolumeNumber":"81","bibliographic_titles":[{"bibliographic_title":"Journal of Photochemistry and Photobiology. B, Biology","bibliographic_titleLang":"en"}]}]},"item_2_description_19":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_2_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Radiation-induced stress, either from visible or UV light, is strongest at midday. We found that, in the absence of stress or time cues, Euglena gracilis Z was the most resistant to UV-C and UV-B at subjective midday, whether judged from immediate or reproductive survival. The circadian UV-resistance rhythms were free-running in stationary cultures under 1-h light/1-h dark cycles or continuous darkness, indicating that cell-cycle dependent DNA susceptibility to UV was not involved. We moreover examined what was the primary cause of the circadian U-V resistance, estimated as the immediate cell survival. The half-maximal lethal dose (LD50) of UV-C at subjective midday (the most resistant phase) was 156 J/m(2), which is similar to 3-fold that at subjective midnight. The same was true for UV-B, except the LD50 was similar to 13-fold that of UV-C. Temperature during UV irradiation had little effect, indicating that survival was not mediated via enzymatic reactions. Non-enzymatic antioxidants were added 5 min before UV irradiation. Dimethylsulfoxide (a hydroxyl radical scavenger) increased survival after UV-B, but had little effect after UV-C conversely, sodium ascorbate increased survival after UV-C, but not after UV-B. These findings suggest that circadian rhythms of resistance to UVs involve a common mechanism for maximizing non-enzymatic antioxidative capacity at subjective midday, but the specific antioxidants differ. (c) 2005 Elsevier B.V. All rights reserved.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_2_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier","subitem_publisher_language":"en"}]},"item_2_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Elsevier","subitem_rights_language":"en"}]},"item_2_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA10686173","subitem_source_identifier_type":"NCID"}]},"item_2_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"10111344","subitem_source_identifier_type":"PISSN"}]},"item_2_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Bolige, Aoen","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"890","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kiyota, Maki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"891","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Goto, Ken","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"317","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"9000001403759","nameIdentifierScheme":"CiNii ID","nameIdentifierURI":"http://ci.nii.ac.jp/nrid/9000001403759"},{"nameIdentifier":"30186887","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=30186887"},{"nameIdentifier":"read0167547","nameIdentifierScheme":"researchmap","nameIdentifierURI":"https://researchmap.jp/read0167547"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-01-30"}],"displaytype":"detail","filename":"g070202-5.pdf","filesize":[{"value":"329.3 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"g070202-5.pdf","url":"https://obihiro.repo.nii.ac.jp/record/360/files/g070202-5.pdf"},"version_id":"1f2f8cac-f6c9-468d-8e88-8bb1b44f80db"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"antioxidant","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"L-ascorbic acid","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"circadian rhythms","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"dimethylsulfoxide","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Euglena gracilis","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"photo-oxidation","subitem_subject_scheme":"Other"},{"subitem_subject":"UV-sensitivity","subitem_subject_scheme":"Other"}]},"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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Circadian rhythms of resistance to UV-C and UV-B radiation in Euglena as related to 'escape from light' and 'resistance to light'","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Circadian rhythms of resistance to UV-C and UV-B radiation in Euglena as related to 'escape from light' and 'resistance to light'","subitem_title_language":"en"}]},"item_type_id":"2","owner":"12","path":["5"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2007-02-02"},"publish_date":"2007-02-02","publish_status":"0","recid":"360","relation_version_is_last":true,"title":["Circadian rhythms of resistance to UV-C and UV-B radiation in Euglena as related to 'escape from light' and 'resistance to light'"],"weko_creator_id":"12","weko_shared_id":-1},"updated":"2024-02-28T02:58:43.794650+00:00"}