| Short communication: rearrangement of rumenic Acid in ruminant fats: a marker of thermal treatment. | |
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MedLine Citation:
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PMID: 15829653 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Rumenic (cis-9,trans-11 18:2) acid is the main conjugated linoleic acid (CLA) isomer in milk and other ruminant fats. Anhydrous regular and high-CLA butterfats were heated at 200 degrees C for 2, 4, and 6 h under atmospheric conditions. [1,5] Sigmatropic isomerization of rumenic acid occurred, resulting in the formation of trans-8,cis-10 18:2 acid, as determined by mass spectrometry of its 4,4-dimethyloxazoline derivative. Rate of isomerization was monitored by gas-liquid chromatography, using a 120-m capillary column coated with 70% equivalent cyanoalkylpolysiloxane polymer, and reaction was of first order. Furthermore, [1,5] sigmatropic rearrangement product analysis can be used as an indicator of heat treatment of natural fats and oils containing CLA. |
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Authors:
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F Destaillats; C Japiot; P Y Chouinard; J Arul; P Angers |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 88 ISSN: 0022-0302 ISO Abbreviation: J. Dairy Sci. Publication Date: 2005 May |
Date Detail:
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Created Date: 2005-04-14 Completed Date: 2005-06-30 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1631-5 Citation Subset: IM |
Affiliation:
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Department of Food Science and Nutrition, and Dairy Research Center (STELA), Quebec, Canada, G1K 7P4. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cattle Chromatography, Gas Fats / chemistry* Fatty Acids / analysis Gas Chromatography-Mass Spectrometry Isomerism Linoleic Acids, Conjugated / analysis*, chemistry Lipids / analysis* Milk / chemistry* Oxazoles / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Fats; 0/Fatty Acids; 0/Linoleic Acids, Conjugated; 0/Lipids; 0/Oxazoles; 1839-11-8/9,11-linoleic acid; 30093-99-3/4,4-dimethyloxazoline; 61789-97-7/tallow |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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