{"created":"2023-05-15T16:32:44.327077+00:00","id":4700,"links":{},"metadata":{"_buckets":{"deposit":"d1b15e3d-5013-4f7e-bba0-66f0a7552329"},"_deposit":{"created_by":2,"id":"4700","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"4700"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00004700","sets":["73:74"]},"author_link":["19063","19060","19064","19061","19062"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2015-04-29","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"17","bibliographicPageEnd":"2548","bibliographicPageStart":"2540","bibliographicVolumeNumber":"71","bibliographic_titles":[{"bibliographic_title":"Tetrahedron"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In our previous chemical study of the production mechanism of black tea polyphenols, we demonstrated that Japanese pear fruit homogenate oxidizes green tea catechins bearing pyrogallol-type and catechol-type B-rings to produce theaflavins and dehydrotheasinensins. In contrast, unripe fruit homogenate of Citrus unshiu selectively oxidizes pyrogallol-type catechins to yield only dehydrotheasinensins. The difference in the selectivity of the two homogenates is probably related to the lower redox potential of pyrogallol-type catechins. The oxidation of epigallocatechin with C. unshiu homogenate gave two new compounds, including an ethanol adduct of an oolongtheanin precursor and epigallocatechin 4′-O-rutinoside, together with theasinensin C, dehydrotheasinensin E, and desgalloyl oolongtheanin. The structure of desgalloyl oolongtheanin should be revised based on the spectroscopic and computational data collected in the current study, and a mechanism responsible for the production of oolongtheanins is also proposed.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Tetrahedron, 71(17), pp.2540-2548; 2015","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier Limited"}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.tet.2015.03.016","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c 2015 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00404020","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"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tadakuma, Fumiya"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Shii, Takuya"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Saito, Yoshinori"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tanaka, Takashi"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-21"}],"displaytype":"detail","filename":"Supple.pdf","filesize":[{"value":"5.1 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Supple.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/4700/files/Supple.pdf"},"version_id":"bfe91101-d05b-4966-91af-0187d8d07efc"},{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-21"}],"displaytype":"detail","filename":"TetLet71_2540.pdf","filesize":[{"value":"391.5 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"TetLet71_2540.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/4700/files/TetLet71_2540.pdf"},"version_id":"fbf57d79-8675-4032-b281-f89035625034"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Black tea","subitem_subject_scheme":"Other"},{"subitem_subject":"Catechin","subitem_subject_scheme":"Other"},{"subitem_subject":"Citrus unshiu","subitem_subject_scheme":"Other"},{"subitem_subject":"Oolongtheanins","subitem_subject_scheme":"Other"},{"subitem_subject":"Oxidation","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":"Selective oxidation of pyrogallol-type catechins with unripe fruit homogenate of Citrus unshiu and structural revision of oolongtheanins","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Selective oxidation of pyrogallol-type catechins with unripe fruit homogenate of Citrus unshiu and structural revision of oolongtheanins"}]},"item_type_id":"2","owner":"2","path":["74"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-04-30"},"publish_date":"2017-04-30","publish_status":"0","recid":"4700","relation_version_is_last":true,"title":["Selective oxidation of pyrogallol-type catechins with unripe fruit homogenate of Citrus unshiu and structural revision of oolongtheanins"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T03:17:01.888132+00:00"}