{"_buckets": {"deposit": "88162a25-d6d6-4492-ac8c-2b94ea82f0aa"}, "_deposit": {"id": "16140", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "16140"}, "status": "published"}, "_oai": {"id": "oai:nagoya.repo.nii.ac.jp:00016140"}, "item_9_alternative_title_19": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u8a00\u8a9e\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Bone sample preparation method for 14C dating"}]}, "item_9_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2012-03", "bibliographicIssueDateType": "Issued"}, "bibliographicPageEnd": "189", "bibliographicPageStart": "185", "bibliographicVolumeNumber": "23", "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": "Bones are one of the most attractive materials for archaeological dating, because they often provide direct information about prehistoric events. Bone collagen is commonly used for 14C-dating of bones. The bone pretreatment includes the removal of mineral phase of bones with 0.4-0.6M HCl followed by a gentle-base-acid extraction to remove extraneous carbon such as humic acids from the organic bone residue. Next, the collagen is dissolved as gelatin at 85-90\u2103 and pH 3 and, and filtered through a glass filter to remove non-soluble contaminants, then freeze-dried. The gelatin with its yield of \u003c0.7 wt% could remain exogenous carbon, and so more cleaning step using the high molecular weight (\u003e30 kD) of gelatins to remove contaminants by ultrafiltration is needed. The appropriate schematic overview of collagen extraction and ultrafiltration is performed. \u907a\u8de1\u304b\u3089\u51fa\u571f\u3059\u308b\u9aa8\u306f\uff64\u5f53\u6642\u306e\u4eba\u306e\u98df\u6027\u3084\u751f\u6d3b\u74b0\u5883\uff64\u5e74\u4ee3\u306a\u3069\u306e\u60c5\u5831\u3092\u76f4\u63a5\u4e0e\u3048\u3066\u304f\u308c\u308b\u3082\u306e\u3068\u3057\u3066\uff64\u8003\u53e4\u5b66\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u3067\u3042\u308b\u3002\u9aa8\u306e14C\u5e74\u4ee3\u6e2c\u5b9a\u306b\u304a\u3044\u3066\u306f\uff64\u4e00\u822c\u7684\u306b\uff64\u786c\u30bf\u30f3\u30d1\u30af\u8cea\u306e\u9aa8\u30b3\u30e9\u30fc\u30b2\u30f3\u304c\u7528\u3044\u3089\u308c\u308b\u3002\u9aa8\u306f\uff64\u307e\u305a0.4-0.6M 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