{"created":"2024-04-18T00:08:48.944215+00:00","id":2000733,"links":{},"metadata":{"_buckets":{"deposit":"a47118a5-6ad1-4d7d-803b-d902b9a93f60"},"_deposit":{"created_by":6,"id":"2000733","owner":"6","owners":[6],"pid":{"revision_id":0,"type":"depid","value":"2000733"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:02000733","sets":["10:11"]},"author_link":[],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2024-04-03","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"art. no. 139186","bibliographicVolumeNumber":"449","bibliographic_titles":[{"bibliographic_title":"Food Chemistry","bibliographic_titleLang":"en"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The autoxidation of tea catechins by dissolved oxygen proceeds in pH-neutral aqueous solutions, and the major products are oligomers. However, the reaction mechanisms have not been clarified. In this study, the autoxidation of (−)-epigallocatechin-3-O-gallate (1) was examined. The autoxidation with β-cyclodextrin, which includes the A-ring of 1, significantly suppressed oligomer production and increased the formation of products generated by the oxidative cleavage of the B-ring, indicating the participation of the A-ring in the oligomerization. Further, the autoxidation of 1 in the presence of phloroglucinol, a mimic of the catechin A-ring, yielded products via the nucleophilic addition of phloroglucinol to the B-ring quinone of 1. These results indicated that the oxidative A–B ring couplings accounted for the major oligomerization mechanism.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Food Chemistry, 449, art. no. 139186; 2024","subitem_description_language":"en","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier Ltd","subitem_publisher_language":"en"}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.foodchem.2024.139186","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2024 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/.","subitem_rights_language":"en"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03088146","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Matsuo, Yosuke","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Katayama, Kohei","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yamashita, Takako","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Saito, Yoshinori","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Tanaka, Takashi","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2025-04-03"}],"filename":"FC449_139186.pdf","filesize":[{"value":"991 KB"}],"format":"application/pdf","url":{"url":"https://nagasaki-u.repo.nii.ac.jp/record/2000733/files/FC449_139186.pdf"},"version_id":"93972123-1770-4a5a-824c-1d50c49619b9"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Epigallocatechin gallate","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Autoxidation","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Oligomerization","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"β-Cyclodextrin","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Phloroglucinol","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Catechin","subitem_subject_language":"en","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":"Oligomerization mechanism of epigallocatechin-3-O-gallate during autoxidation","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Oligomerization mechanism of epigallocatechin-3-O-gallate during autoxidation","subitem_title_language":"en"}]},"item_type_id":"2","owner":"6","path":["11"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-04-18"},"publish_date":"2024-04-18","publish_status":"0","recid":"2000733","relation_version_is_last":true,"title":["Oligomerization mechanism of epigallocatechin-3-O-gallate during autoxidation"],"weko_creator_id":"6","weko_shared_id":-1},"updated":"2024-04-18T00:12:47.607188+00:00"}