Deuterium depletion in the fatty acids from beef

• Aoyagi Kanji

  Department of Chemistry, Tokyo Metropolitan University

• Goto Akiko S.

  Institute of Science and Engineering, Kanazawa University

• Fujino Tatsuya

  Department of Chemistry, Tokyo Metropolitan University

• Korenaga Takashi

  Faculty of Risk and Crisis Management, Chiba Institute of Science

• Chikaraishi Yoshito

  Japan Agency for Marine-Earth Science and Technology

抄録

We examined stable hydrogen (δD, ‰ relative to V-SMOW) and carbon isotopic compositions (δ¹³C, ‰ relative to V-PDB) of fatty acids extracted from beef, and compared them with those from feeds (mixtures of plant materials) for the cattle. The δD value of stearic acid in beef is similar to that in the feeds, whereas the palmitic and oleic acids in beef are both significantly depleted in D (by ca. 60‰) as compared with the corresponding acids in the feeds. On the other hand, these fatty acids in beef are enriched in ¹³C (by up to 5.7‰) relative to the corresponding acids in the feeds. Thus, the isotopic compositions of fatty acids in beef are not identical to those in the feeds. These results suggest that fatty acids in beef are an admixture of fatty acids derived from de novo biosynthesis in the cattle and from the feeds, and may imply that a considerable D-depletion process (e.g., hydrogenation of feed-derived fatty acids and/or dehydrogenation-hydrogenation cycling) occur in the fatty acids of the cattle.

収録刊行物

• Researches in Organic Geochemistry

  Researches in Organic Geochemistry 29 (0), 65-69, 2014

  日本有機地球化学会

キーワード

• fatty acids
• hydrogen isotopic composition
• heterotroph

詳細情報

• CRID: 1390282680389358720
• NII論文ID: 110009798421
• NII書誌ID: AA11889471
• DOI: 10.20612/rog.29.0_65
• ISSN: 21897891
• ISSN: 13449915
• NDL書誌ID: 025244956
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I025244956
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可