Document Detail

Short communication: rearrangement of rumenic Acid in ruminant fats: a marker of thermal treatment.
MedLine Citation:
PMID:  15829653     Owner:  NLM     Status:  MEDLINE    
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.
F Destaillats; C Japiot; P Y Chouinard; J Arul; P Angers
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  88     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-04-14     Completed Date:  2005-06-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1631-5     Citation Subset:  IM    
Department of Food Science and Nutrition, and Dairy Research Center (STELA), Quebec, Canada, G1K 7P4.
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MeSH Terms
Chromatography, Gas
Fats / chemistry*
Fatty Acids / analysis
Gas Chromatography-Mass Spectrometry
Linoleic Acids, Conjugated / analysis*,  chemistry
Lipids / analysis*
Milk / chemistry*
Oxazoles / chemistry
Reg. No./Substance:
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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