研究者詳細 - 南　雅代

論文 - 南　雅代

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Radiocarbon dating of VIRI bone samples using ultrafiltration

Minami Masayo, Yamazaki Kana, Omori Takayuki, Nakamura Toshio

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 294 巻頁： 240 - 245 2013年1月

記述言語：日本語出版者・発行元：Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

Ultrafiltration can effectively remove low-molecular-weight (LMW) contaminants from bone gelatin to extract high-molecular-weight (HMW) proteins that are derived from original bone collagen, though it cannot remove HMW collagen crosslinked with humic acids. Therefore, ultrafiltration is often used to obtain more accurate 14C dates of bones. However, ultrafiltration may introduce new contaminants to bone gelatins, mainly from ultrafilters used. To study the effects of ultrafiltration on 14C age, we analyzed the C/N ratio, δ13CPDB and δ15N AIR values, and 14C ages of acid-soluble bone collagen obtained by decalcification, gelatin extracted from acid-insoluble bone collagen, and the HMW gelatin and LMW fractions produced during ultrafiltration of the extracted gelatin. Bone samples from the Fifth International Radiocarbon Intercomparison (VIRI) were used: VIRI-E (mammoth), -F (horse), -G (human), and -I (whale). In this study, carbon and nitrogen content and gelatin yields were used to evaluate collagen preservation in the VIRI bone samples. Radiocarbon ages, δ13CPDB and δ15N AIR values of unfiltered and HMW gelatins were obtained and compared with the published consensus values. The LMW fraction was found to exhibit different values from those of the other fractions, indicating the possible presence of extraneous contamination. The Vivaspin™ 6 ultrafilters used in this study were analyzed and radiocarbon dated both before and after cleaning. We present evidence to suggest that LMW fraction contaminants could be derived from the ultrafilters rather than humic substances. Excessively long ultrafiltration time was suspected to have contaminated the bone samples with material from the ultrafilter, because those samples exhibited older 14C ages than did those filtered for shorter durations. The results in this study indicate that 14C ages of unfiltered gelatin extracted from well-preserved bones can be sufficiently accurate, and that care should be taken not to contaminate bone gelatin during ultrafiltration. Additional studies investigating bones with different degrees of degradation are needed to determine the effectiveness of ultrafiltration for accurate 14C dating when the collagen is not so well preserved. © 2012 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nimb.2012.06.016

Web of Science

Scopus

エル・サルバドル共和国から出土した先スペイン期埋葬人骨の同位体分析査読有り

南雅代・市川彰・坂田健・森田航・伊藤伸幸

考古学と自然科学 64 巻頁： 1-25 2013年

Less impact of limestone bedrock on elemental concentrations in stream sediments -Case study of Akiyoshi area- 査読有り

Ohta, A. and Minami, M.

Bulletin of the Geological Survey of Japan 64 巻 ( 5/6 ) 頁： 121-138 2013年

骨試料の年代測定

南雅代

フィッション・トラックニュースレター 26 巻頁： 76 - 79 2013年

アミノ酸ラセミ化法を用いた骨遺物の年代決定

南雅代

新学術領域研究ニュースレター 2 巻頁： 3 - 4 2013年

Radiocarbon dating of human skeletons of medieval archaelogical sites in Kamakura, Japan: were they killed by Nitta Yoshisada’s attack on Kamakura in AD 1333?

Minami M, Nakamural T, Nagaoka T, Hirata K

Radiocarbon 54 巻 ( 3-4 ) 頁： 599 - 613 2012年

記述言語：日本語出版者・発行元：Radiocarbon

We investigated the radiocarbon ages and carbon and nitrogen isotope ratios of human skeletal remains from burials at the Yuigahama-minami and Chusei-Shudan-Bochi sites in the Yuigahama area (Kamakura, Japan), which we believe are associated with the great attack on Kamakura by Nitta Yoshisada in AD 1333. The human bones produced enriched δ13C and δ15N values that could be affected by consumption of protein from marine fish and/or mammals with high δ13C and δ15N, and therefore older apparent 14C ages. We thus estimated the marine reservoir effect on human skeletons to determine their true ages. The IsoSource isotope mixing model was employed for reconstructing percentages of marine protein in the human diet, and calibrated calendar dates for the 14C ages were calculated using the marine percentages. At the Yuigahama-minami site, most skeletons from individual burials now date to the last phase of the Kamakura period or the early part of the Muromachi period, while skeletons from mixed human-animal multiple burials date to the latter part of the Kamakura period. The humans from the individual burials, consisting of normal ratios of adult males, could have died a natural death, though the site could also have been used to inter victims of the battle of 1333. The humans from mixed human-animal burials, consisting of a high proportion of infants, were not victims of the 1333 battle, but the site may have been used to inter victims of the Kamakura earthquake in 1293, which resulted in a catastrophic tsunami. On the other hand, the skeletons from multiple burials in the Chusei-Shudan-Bochi site all date to the middle Kamakura period. Coupled with the fact that most humans in the site are male but show no evidence of injuries by sword cuts, it is likely that burials of the Chusei-Shudan-Bochi site could have been a collective interment following the Jinji earthquake in 1241, the Shoka earthquake in 1257, or the Shoka famine in 1258 in the middle Kamakura period. The results of this study indicate that humans from burials in the Yuigahama region were not necessarily victims of the attack by Nitta Yoshisada on Kamakura, but instead were likely victims of natural disasters such as large earthquakes and severe famines, which often occurred in the middle Kamakura period. © 2012 by the Arizona Board of Regents on behalf of the University of Arizona.

DOI： 10.1017/s0033822200047287

Scopus

里山からキツネが消えた日-一匹のキツネのC・N・Sr同位体比測定査読有り

南雅代

海洋化学研究 24 巻頁： 64 - 72 2012年

同一古人骨の部位によるアミノ酸組成ならびに14C年代の比較

坂田健, 南雅代

名古屋大学加速器質量分析計業績報告書 XXIII 巻頁： 86 - 96 2012年

14C年代測定のための骨試料調製法

南雅代

名古屋大学加速器質量分析計業績報告書 XXIII 巻頁： 185 - 189 2012年

A first step toward small-mass AMS radiocarbon analysis at Nagoya University 査読有り

南雅代

Nucl. Instr. and Meth. in Phys. Res. －巻 2012年

Radiocarbon dating of VIRI bone samples using ultrafiltration 査読有り

南雅代

Nucl. Instr. and Meth. in Phys. Res. －巻 2012年

ストロンチウム同位体比を用いた過去の人類の移動の解明

南雅代

化学と教育 60 巻頁： 472 - 473 2012年

北海道利尻島の泥炭地に飛来する鉛の供給源の変遷

谷水雅治, 淺原良浩, 南雅代

名古屋大学加速器質量分析計業績報告書 XXIII 巻頁： 138 - 148 2012年

同位体分析による実構造物中のコンクリートの中性化進行評価の試み査読有り

淺原良浩, 南雅代, 吉田英一

セメントコンクリート論文集 64(印刷中) 巻 2011年

A first step toward small-mass AMS radiocarbon analysis at Nagoya University

南雅代

第12回AMSシンポジウム報告書 12 巻頁： 57 - 60 2011年

Radiocarbon dating of carbonized material adhering to pottery-The difference of Carbon-14 age between inner and outer surface of the pottery in wetland archaeological site 査読有り

南雅代

Proceedings of the Japan Academy Ser B 87 巻頁： 518 - 528 2011年

The radiocarbon age differences caused by shell species, tissues or collected locations and their influence for radiocarbon dating of archaeological samples in Lake Biwa, Japan

南雅代

The 4th East Asia accelerator Mass Spectrometry symposium(EA-AMS4) 頁： 137 - 144 2011年

同位体分析による実構造物中のコンクリートの中性化進行評価の試み. 査読有り

丸山一平・淺原良浩・南雅代・吉田英一

セメントコンクリート論文集 64 巻頁： 139-146 2010年

同位体分析による実構造物中のコンクリートの中性化進行評価の試み

丸山一平, 淺原良浩, 南雅代, 吉田英一

セメント・コンクリート論文集 64 巻 ( 1 ) 頁： 139 - 146 2010年

記述言語：日本語出版者・発行元：一般社団法人セメント協会

本検討では、名古屋市内の構造物のコア試験体に対して、放射性炭素に関する分析を行い、コンクリートの中性化現象について考察を行った。その結果、コンクリートの中性化現象について14C濃度を評価した結果、表層で濃度が高く、内部で低くなる傾向が得られた。また、14C濃度の経年変化プロファイルを参照することで、建設年代の情報があれば、中性化の進行プロセスを推定できる可能性があることがわかった。また、14C濃度は、フェノールフタレインの呈色反応によって評価される中性化フロントよりもかなり奥まで高い数値を保持しており、この値は、材料由来か、あるいは深部までCO2が到達したことによると考えられた。

DOI： 10.14250/cement.64.139

CiNii Research

限外濾過調製法を用いた骨ゼラチンの14C年代測定.

南雅代

名古屋大学加速器質量分析計業績報告書 XXI 頁： 32 - 40 2010年

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