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The XAD-2 treatment of collagen hydrolysate is considered an effective method to eliminate the foreign organic matter from bone. In this study, we have conducted ^\u003c14\u003eC dating, by the XAD-2 method, on a molar fossil of Naumann\u0027s elephant (Palaeoloxodon naumanni) collected from the Uwa-sea, offshore Natori-kajitanihana, Nishi-Uwa-gun, Ehime prefecture. The ^\u003c14\u003eC date of 29,200±870 yr BP was already obtained for gelatin collagen by gelatin-extraction method of decalcification in a cellulose tube with 1.2N HCl, followed by heating at 90℃ in water (Nakamura et al., 1998). Three parts of dentine, enamel and cement in the molar fossil were separated for each ^\u003c14\u003eC dating. The samples were decalcificated with 4℃, 0.8N HCl and the acid-insoluble residues were concentrated by centrifugation and lyophilized. The demineralized fractions were hydrolysed with 6N HCl at 110℃. 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ナウマンゾウ臼歯化石のAMS<14>^C年代 : XAD-2樹脂を用いて
https://doi.org/10.18999/sumrua.10.139
https://doi.org/10.18999/sumrua.10.139dcf963e8-7ea2-4861-92e5-a08b3ecf6b33
名前 / ファイル | ライセンス | アクション |
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-05-25 | |||||
タイトル | ||||||
タイトル | ナウマンゾウ臼歯化石のAMS<14>^C年代 : XAD-2樹脂を用いて | |||||
その他のタイトル | ||||||
その他のタイトル | AMS <14>^C age of a Molar fossil of Maumann's elephant : with XAD-2 resin | |||||
著者 |
南, 雅代
× 南, 雅代× Minami, Masayo× 中村, 俊夫× Nakamura, Toshio |
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権利 | ||||||
権利情報 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
権利 | ||||||
権利情報 | 本文データは学協会の許諾に基づきCiNiiから複製したものである | |||||
抄録 | ||||||
内容記述 | The predominant contaminants such as humic and fulvic acids affect ^<14>C date and stable isotope analyses in fossil bone. The XAD-2 treatment of collagen hydrolysate is considered an effective method to eliminate the foreign organic matter from bone. In this study, we have conducted ^<14>C dating, by the XAD-2 method, on a molar fossil of Naumann's elephant (Palaeoloxodon naumanni) collected from the Uwa-sea, offshore Natori-kajitanihana, Nishi-Uwa-gun, Ehime prefecture. The ^<14>C date of 29,200±870 yr BP was already obtained for gelatin collagen by gelatin-extraction method of decalcification in a cellulose tube with 1.2N HCl, followed by heating at 90℃ in water (Nakamura et al., 1998). Three parts of dentine, enamel and cement in the molar fossil were separated for each ^<14>C dating. The samples were decalcificated with 4℃, 0.8N HCl and the acid-insoluble residues were concentrated by centrifugation and lyophilized. The demineralized fractions were hydrolysed with 6N HCl at 110℃. The filtered hydrolysates were passed through the XAD-2 resin to remove fulvic and humic acids. Dentine phase in the molar fossil gives older ^<14>C age than enamel and cement phases. It is thought that the dentine, covered with enamel and cement phases, is better-preserved. The ^<14>C age of the XAD-purified hydrolysates (XAD) is older than that of solution collagen (SC), but coincide with age of gelatin collagen (GC) in dentine phase. Enamel phase gives different C/N ratio, δ ^<13>C and δ ^<15>N values from those of dentine and cement phases, and relatively younger age, which indicates that the majority of enamel protein has decomposed and changed to hydroxyapatite. All fulvic fractions (F) of three phases give significantly younger ages than bone organic carbon. The molar fossil might be well-preserved because of the higher yield (1.22%) of gelatin collagen more than 1%. The gelatin-extraction method is sufficient for ^<14>C dating on the well-preserved fossil. | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 1998 (平成10)年度 | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
出版者 | 名古屋大学年代測定資料研究センター 天然放射性元素測定小委員会 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.18999/sumrua.10.139 | |||||
ID登録タイプ | JaLC | |||||
関連情報 | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | URI | |||||
関連識別子 | http://ci.nii.ac.jp/naid/110000475591/ | |||||
書誌情報 |
名古屋大学加速器質量分析計業績報告書 巻 10, p. 139-148, 発行日 1999-03 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | publisher |