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Normal alkanes ranging in carbon chain length from C_\u003c15\u003e to C_\u003c35\u003e with a predominance of odd-carbon numbers were found in the sediment and algal mat samples, together with monomethyl-and dimethyl-branched alkanes and/or alkenes. Interestingly, long-chain n-alkenes were present in some sediment samples. Also, triterpenes, such as hop-22(29)-ene and 17β(H), 21β(H)-hopane, and 5α(H), 14α(H), 17α(H)-C_\u003c27\u003e-C_\u003c29\u003e steranes were found in most samples. Normal alkanoic acids in carbon chain length ranging from C_\u003c10\u003e-C_\u003c32\u003e with a predominance of even-carbon numbers were detected in the samples, along with iso-and anteiso-alkanoic acids (C_\u003c12\u003e-C_\u003c17\u003e) and n-alkenoic acids (C_\u003c16\u003e and C_\u003c18\u003e). Unusually, long-chain n-alkanes and n-alkanoic acids (\u003eC_\u003c19\u003e) were major components in certain samples. 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ORGANIC GEOCHEMICAL STUDY OF LAKE SEDIMENTS AND ALGAL MATS FROM THE LUTZOW-HOLM BAY REGION, ANTARCTICA
https://doi.org/10.15094/00002739
https://doi.org/10.15094/000027394713da0b-1f2b-4066-92b8-704c587f5389
名前 / ファイル | ライセンス | アクション |
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KJ00002368369 (130.3 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1993-09-01 | |||||
タイトル | ||||||
タイトル | ORGANIC GEOCHEMICAL STUDY OF LAKE SEDIMENTS AND ALGAL MATS FROM THE LUTZOW-HOLM BAY REGION, ANTARCTICA | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00002739 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
記事種別(英) | ||||||
en | ||||||
ABSTRACT | ||||||
論文名よみ | ||||||
その他のタイトル | ORGANIC GEOCHEMICAL STUDY OF LAKE SEDIMENTS AND ALGAL MATS FROM THE LUTZOW-HOLM BAY REGION, ANTARCTICA | |||||
著者名よみ |
マツモト, ゲンキ
× マツモト, ゲンキ× オオタニ, シュウジ× ムラヤマ, ハルタ× ワタヌキ, クニヒコ× トリイ, テツヤ |
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著者名(英) |
MATSUMOTO, Genki I.
× MATSUMOTO, Genki I.× OHTANI, Shuji× MURAYAMA, Haruta× WATANUKI, Kunihiko× TORII, Tetsuya |
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著者所属(英) | ||||||
en | ||||||
Department of Environmental Information Science, School of Social Information Studies, Otsuma Women's University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Biology, Faculty of Education, Shimane University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Chemistry, Faculty of Education, Yokohama National University | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Chemistry, College of Arts and Sciences, University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
Japan Polar Research Association | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The organic geochemical study of hydrocarbons and fatty acids in lake sediments and algal mats from the Lutzow-Holm Bay region, East Antarctica was carried out to elucidate their features for the paucity of vascular plants in relation to source organisms. Normal alkanes ranging in carbon chain length from C_<15> to C_<35> with a predominance of odd-carbon numbers were found in the sediment and algal mat samples, together with monomethyl-and dimethyl-branched alkanes and/or alkenes. Interestingly, long-chain n-alkenes were present in some sediment samples. Also, triterpenes, such as hop-22(29)-ene and 17β(H), 21β(H)-hopane, and 5α(H), 14α(H), 17α(H)-C_<27>-C_<29> steranes were found in most samples. Normal alkanoic acids in carbon chain length ranging from C_<10>-C_<32> with a predominance of even-carbon numbers were detected in the samples, along with iso-and anteiso-alkanoic acids (C_<12>-C_<17>) and n-alkenoic acids (C_<16> and C_<18>). Unusually, long-chain n-alkanes and n-alkanoic acids (>C_<19>) were major components in certain samples. The major organisms in algal mats were Cyanophyceae (Nostoc sp. or Phormidium sp.), Bacillariophyceae (Amphora veneta, Coscinodiscus sp., Fradilariopsis curta or Navicula cryptocephala) or Chlorophyceae (Cosmarium clepsydra or Oedogonium sp. These algae and cyanobacteria are commonly distributed in Antarctic lakes and ponds. However, the major organisms in the sediments are all Bacillariophyceae, suggesting that settled organic matter in the sediments is degraded largely after sedimentation, and only Bacillariophyceae remained. Also, n-alkenoic acid/n-alkanoic acid ratios probably reflect the degree of destruction of organic matter. The abundance of alkenes may be explained by low environmental temperatures in the region, since it is known that unsaturated compounds in some plankton increase with decreasing ambient temperatures. The absence of thermally matured triterpanes and steranes indicates that organic matter in the lakes is mainly synthesized by in situ organisms, and the contribution of eroded materials is small. These compounds may be derived from diatoms, green algae and/or cyanobacteria, with some influence of bacteria. However, the specific source organisms of these organic compounds are not yet clear. Algal mats are important sources of organic matter in the lake and ice-free areas in Antarctica. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA1072335X | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Geosciences 巻 6, p. 153-154, 発行日 1993-09 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |