{"created":"2022-01-27T08:17:32.595136+00:00","id":2004844,"links":{},"metadata":{"_buckets":{"deposit":"7da43947-4d28-48b5-950b-03efb11880df"},"_deposit":{"id":"2004844","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"2004844"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02004844","sets":["1642837622505:1642837957109:1642837963466","1642838403551:1642838406414"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"Catalytic Effect of Magnesium Ions on Polymorphic Crystallization of Calcium Carbonate","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Oomori, Tamotsu","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"Kitano, Yasushi","creatorNameLang":"en"}]},{"creatorNames":[{"creatorName":"大森, 保","creatorNameLang":"ja"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_1522299639480":"open access","subitem_1600958577026":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"The effect of Mg^<2+> ions on the polymorphic crystallization of calcium carbonate has been studied by precipitating carbonate minerals from Ca(HCO_3)_2 (Ca^<2+>, 400 mg/l) solutions containing various amount of Mg^<2+> ions (0 to 2000  mg/l) at the temperature of 2 to 80℃. The concentration of Mg^<2+> ions and temperature in a parent solution affect remarkably the aragonite formation. The precipitating fields of calcite and/or aragonite are systematically represented on log[Mg^<2+>] vs. l/T diagram. Energetic effect of Mg^<2+> ions on aragonite formation is estimated from an Ahrenius type relationship between required concentration of Mg^<2+> ions and absolute temperature to form aragonite; [Mg^<2+>] = A・exp (-E/RT), where E = 13 Kcal/mol, which will be needed to form aragonite nucleous from solution. The presence of calcite seeds favors the calcite formation in the presence of Mg^<2+> ions lower than 400 mg/l.","subitem_description_type":"Other"},{"subitem_description":"紀要論文","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"琉球大学理学部"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"eng"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/12170"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_1522646500366":"ISSN","subitem_1522646572813":"0286-9640"},{"subitem_1522646500366":"NCID","subitem_1522646572813":"AN00250774"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_1522650068558":"ja","subitem_1522650091861":"琉球大学理学部紀要"},{"subitem_1522650068558":"en","subitem_1522650091861":"Bulletin of the College of Science. University of the Ryukyus"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1985-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"39","bibliographicPageEnd":"62","bibliographicPageStart":"57"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_1522305645492":"VoR","subitem_1600292170262":"http://purl.org/coar/version/c_970fb48d4fbd8a85"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"No39p057.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2004844/files/No39p057.pdf"},"version_id":"b539dd98-b8d0-4c3e-ad3d-78707e8e91ac"}]},"item_title":"Catalytic Effect of Magnesium Ions on Polymorphic Crystallization of Calcium Carbonate","item_type_id":"15","owner":"1","path":["1642837963466","1642838406414"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2009-08-28"},"publish_date":"2009-08-28","publish_status":"0","recid":"2004844","relation_version_is_last":true,"title":["Catalytic Effect of Magnesium Ions on Polymorphic Crystallization of Calcium Carbonate"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-10-31T02:24:08.826647+00:00"}