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- Aoyagi Kanji
- Department of Chemistry, Tokyo Metropolitan University
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- Goto Akiko S.
- Institute of Science and Engineering, Kanazawa University
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- Fujino Tatsuya
- Department of Chemistry, Tokyo Metropolitan University
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- Korenaga Takashi
- Faculty of Risk and Crisis Management, Chiba Institute of Science
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- Chikaraishi Yoshito
- Japan Agency for Marine-Earth Science and Technology
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Abstract
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.
Journal
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- Researches in Organic Geochemistry
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Researches in Organic Geochemistry 29 (0), 65-69, 2014
The Japanese Association of Organic Geochemists
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Details 詳細情報について
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- CRID
- 1390282680389358720
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- NII Article ID
- 110009798421
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- NII Book ID
- AA11889471
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- ISSN
- 21897891
- 13449915
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- NDL BIB ID
- 025244956
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed