the contents of trans fatty acids and cla in cow colostrum and milk fat in the early lactation period

Beata Paszczyk, Zofia Żegarska and Zbigniew Borejszo
Additional contact information
Beata Paszczyk: Chair of Instrumental Analyses, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Zofia Żegarska: Chair of Instrumental Analyses, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
Zbigniew Borejszo: Chair of Instrumental Analyses, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

Czech Journal of Food Sciences, 2005, vol. 23, issue 4, 159-165

Abstract: The trans fatty acids as well as cis-9 trans-11 C18:2 (CLA) were determined in the colostrum and milk fat of individual cows during up to 82 days of lactation. The analyses were performed using gas chromatography (GLC) on a capillary column (CP Sil 88) combined with the method of argentation thin-layer chromatography (Ag-TLC). The results obtained in the study indicated that the milk fat of individual cows, kept under identical living and feeding conditions, was characterised by an extremely high variability of trans isomers concentration, especially of those of C18:1 acid. The differences referred not only to the total content of trans C18:1 isomers but also to the proportion of trans-10 and trans-11 isomers of C18:1. In some fat samples, a high concentration of trans C18:1 isomers was observed and trans-10 isomer of C18:1 was found to dominate. In the case of all the cows, the colostrum fat was characterised by a lower average content of the examined acids as compared to the milk fat. The average value of CLA in the colostrum fat of all the cows under study was 0.34%, and in the milk fat 0.42% of total fatty acids.

Keywords: milk fat; trans C18:1; trans C18:2; cis-9 trans-11 C18:2 (CLA); lactation period; GLC/TLC-AgNO3 analysis (search for similar items in EconPapers)
Date: 2005
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://cjfs.agriculturejournals.cz/doi/10.17221/3386-CJFS.html (text/html)
http://cjfs.agriculturejournals.cz/doi/10.17221/3386-CJFS.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:23:y:2005:i:4:id:3386-cjfs

DOI: 10.17221/3386-CJFS

Access Statistics for this article

Czech Journal of Food Sciences is currently edited by Ing. Zdeňka Náglová, Ph.D.

More articles in Czech Journal of Food Sciences from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().