{"_buckets": {"deposit": "4f88483b-da07-49fa-a464-7372f22fe858"}, "_deposit": {"id": "11844", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "11844"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00011844"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "The AMS dating of lipids in lake sediments : a basic study of lipids extraction method for ^\u003c14\u003eC measurement(Summaries of Research Using AMS)"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2007-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "210", "bibliographicPageStart": "203", "bibliographicVolumeNumber": "18", "bibliographic_titles": [{"bibliographic_title": "\u540d\u53e4\u5c4b\u5927\u5b66\u52a0\u901f\u5668\u8cea\u91cf\u5206\u6790\u8a08\u696d\u7e3e\u5831\u544a\u66f8"}]}]}, "item_9_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "\u6e56\u6cbc\u5806\u7a4d\u7269\u4e2d\u306e\u8102\u8cea\u5316\u5408\u7269(\u8102\u80aa\u9178\u3001\u70ad\u5316\u6c34\u7d20\u7b49)\u306e\u653e\u5c04\u6027\u70ad\u7d20\u5e74\u4ee3\u6e2c\u5b9a\u3092\u76ee\u7684\u3068\u3057\u305f\u57fa\u790e\u5b9f\u9a13\u7d50\u679c\u3092\u5831\u544a\u3059\u308b\u3002\u6a19\u6e96\u8a66\u6599\u3068\u3057\u3066\u76f4\u9396\u72b6\u98fd\u548c\u8102\u80aa\u9178\u30e1\u30c1\u30eb\u30a8\u30b9\u30c6\u30eb\u6df7\u5408\u7269(\u70ad\u7d20\u657016-24)\u3001\u76f4\u9396\u72b6\u98fd\u548c\u70ad\u5316\u6c34\u7d20 (Octacosane,\u70ad\u7d20\u657028)\u3092\u7528\u3044\u3066\u3001\u62bd\u51fa\u64cd\u4f5c\u524d\u3068\u5f8c\u3067\u306e\u5e74\u4ee3\u5024\u3092\u6bd4\u8f03\u3057\u305f\u3002\u76f4\u9396\u72b6\u98fd\u548c\u8102\u80aa\u9178\u30e1\u30c1\u30eb\u30a8\u30b9\u30c6\u30eb\u6df7\u5408\u7269\u306b\u304a\u3044\u3066\u306f\u3001\u8102\u8cea\u62bd\u51fa\u64cd\u4f5c\u306b\u3088\u308a\u5e73\u5747100\u5e74\u7a0b\u5ea6\u3001^\u003c14\u003eC\u5e74\u4ee3\u304c\u53e4\u304f\u306a\u308b\u7d50\u679c\u304c\u5f97\u3089\u308c\u305f\u3002\u76f4\u9396\u72b6\u98fd\u548c\u70ad\u5316\u6c34\u7d20\u306b\u304a\u3044\u3066\u306f\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u306b\u8fd1\u3044\u5024\u304c\u5f97\u3089\u308c\u3001\u8102\u8cea\u62bd\u51fa\u64cd\u4f5c\u524d\u3068\u5f8c\u3067\u306e^\u003c14\u003eC\u5e74\u4ee3\u5024\u306b\u5dee\u306f\u8a8d\u3081\u3089\u308c\u306a\u304b\u3063\u305f\u3002\u8102\u80aa\u9178\u306e\u5e74\u4ee3\u5024\u304c\u5909\u5316\u3057\u305f\u7406\u7531\u3068\u3057\u3066\u3001\u4f7f\u7528\u3057\u305f\u6709\u6a5f\u6eb6\u5a92(\u30b8\u30af\u30ed\u30ed\u30e1\u30bf\u30f3\u3001\u30e1\u30bf\u30ce\u30fc\u30eb)\u306e\u8abf\u88fd\u6cd5\u306e\u9055\u3044\u306b\u3088\u308b\u3082\u306e\u3068\u8003\u3048\u3089\u308c\u308b\u3002\\\n\\\nThe age dating and age models for the Late Pleistocene-Holocene studies have mainly progressed by radiocarbon measurements of biogenic materials (total organic carbon (TOC), plant residues, micro fossils) using accelerator mass spectrometry (AMS; Andreev et al., 2001; Yi et al., 2004; Vasi\u0027chuk et al., 2004; Bezrukova et al., 2005). AMS radiocarbon dating is indispensable to perform paleo-environmental, climatic and biological studies. Radiocarbon dating of sedimentary lipids provides relatively accurate age, because total organic carbon (TOC) in the sediments is complex mixture of various organic materials. In this study, we estimate modern and/or dead carbon effect on radiocarbon dating by lipid extraction procedures for lake sediments. For lipids extraction, authentic lipids and wet sediment samples were weighted in 70 ml Teflon centrifuged tubes. 50ml of dichloromethane/methanol (2:1v/v, grade 5000, WAKO) were added in each tubes, then ultrasonicated, shaken with ceramic balls (30 min.) and centrifuged. The supernatant was removed and repeated 3-5 times until the supernatant was colorless. For radiocarbon dating and stable carbon isotope measurements, lipids were combusted at 850\u2103 for 6 hours in evacuated bycol tubes (9mm x 35 cm) with CuO and Ag wire. The resulting CO_2 was collected and purified in a vacuum line and subsequently reduced to graphite with an iron catalyst and hydrogen at 650\u2103 for 6h. 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