HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Interpretive Summary Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Alves, S. P. Articles by Bessa, R. J. B. Search for Related Content PubMed PubMed Citation Articles by Alves, S. P. Articles by Bessa, R. J. B.

Short Communication: The Nature of Heptadecenoic Acid in Ruminant Fats

Estação Zootécnica Nacional, Instituto Nacional de Investigação Agrária e das Pescas, 2005-048 Vale de Santarém, Portugal

¹ Corresponding author: rjbbessa{at}mail.telepac.pt

Heptadecenoic acid (17:1) is a minor constituent of ruminant fats and its isomeric definition remains undefined in most reports on ruminant milk and intramuscular fat. Samples of milk and intramuscular fat of bovine, ovine, and caprine origin were analyzed by gas chromatography (GC) using 3 capillary columns with and without addition of 17:1 cis-10. Additionally, cis isomers of ovine milk fat samples were isolated as methyl esters by preparative thin-layer chromatography and analyzed by GC. The structural analysis of 17:1 present in samples was achieved by chemical ionization tandem mass spectrometry techniques. The isomer 17:1 cis-9 is the overwhelming heptadecenoic isomer in ruminant milk and intramuscular fat; 17:1 cis-10 is virtually absent. Moreover, current GC methods were able to resolve cis-9 from cis-10 and cis-8 isomers, so reports on 17:1 contents in ruminant fat should define its isomeric composition.

Key Words: gas chromatography-tandem mass spectrometry • heptadecenoic acid • milk fat • muscle

This article has been cited by other articles:

				O. A. Rego, S. M. M. Regalo, H. J. D. Rosa, S. P. Alves, A. E. S. Borba, R. J. B. Bessa, A. R. J. Cabrita, and A. J. M. Fonseca Effects of Grass Silage and Soybean Meal Supplementation on Milk Production and Milk Fatty Acid Profiles of Grazing Dairy Cows J Dairy Sci, July 1, 2008; 91(7): 2736 - 2743. [Abstract] [Full Text] [PDF]

				A. R. J. Cabrita, R. J. B. Bessa, S. P. Alves, R. J. Dewhurst, and A. J. M. Fonseca Effects of Dietary Protein and Starch on Intake, Milk Production, and Milk Fatty Acid Profiles of Dairy Cows Fed Corn Silage-Based Diets J Dairy Sci, March 1, 2007; 90(3): 1429 - 1439. [Abstract] [Full Text] [PDF]