Changes in fatty acid composition and conjugated linoleic acid contents of milk and dairy products caused by pure cultures as well as during microwave heat treatment

Authors

  • Rozália Veronika Salamon University of Transylvania, Csíkszereda Campus, Department of Food Sciences, RO-530104 Csíkszereda, Szabadság tér 1.
  • Katalin Lóki University of Kaposvár, Faculty of Animal Sciences, H-7400 Kaposvár, Guba S. u. 40.
  • Szidónia Salamon University of Transylvania, Csíkszereda Campus, Department of Food Sciences, RO-530104 Csíkszereda, Szabadság tér 1.
  • Beáta Albert University of Transylvania, Csíkszereda Campus, Department of Food Sciences, RO-530104 Csíkszereda, Szabadság tér 1.
  • Zsolt Mándoki University of Kaposvár, Faculty of Animal Sciences, H-7400 Kaposvár, Guba S. u. 40.
  • Zsuzsanna Csapóné Kiss University of Kaposvár, Faculty of Animal Sciences, H-7400 Kaposvár, Guba S. u. 40.
  • Péter Sára University of Kaposvár, Faculty of Animal Sciences, H-7400 Kaposvár, Guba S. u. 40.
  • Anikó Borosné Győri University of Debrecen, Center of Agricultural Sciences, H-4032 Debrecen, Böszörményi u. 138.
  • Zoltán Győri University of Debrecen, Center of Agricultural Sciences, H-4032 Debrecen, Böszörményi u. 138.
  • János Csapó University of Transylvania, Csíkszereda Campus, Department of Food Sciences, RO-530104 Csíkszereda, Szabadság tér 1. , University of Kaposvár, Faculty of Animal Sciences, H-7400 Kaposvár, Guba S. u. 40. , University of Debrecen, Center of Agricultural Sciences, H-4032 Debrecen, Böszörményi u. 138.

Keywords:

pure cultures, conjugated linoleic acid, trans fatty acids, microwave heat treatment

Abstract

In the first part of this research we have investigated the effect of various pure cultures (Lactobacillus lactis subsp. lactis, Lactobacillus lactis subsp. cremoris, Streptococcus salivarius subsp. thermophilus, Lactobacillus delbrueckii subsp. bulgaricus, Lactobacillus lactis subsp. lactis biovar, Lactobacillus diacetilactis, Lactobacillus acidophilus, Bifidobacterium lactis) on fatty acid composition of soured dairy products (Sana, yoghurt) manufactured using different technologies, with special regard to conjugated linoleic acid (CLA). It was established that the cultures we used and which are also commonly used in the dairy industry, had only a slight effect on fatty acid composition of milk. Although minimal differences were found in case of the individual fatty acids, however, due to the small differences it can be established that the cultures have no influence on nutritional value of milk fat. In the second part of our experiments we have determined fatty acid composition of cow's milk with fat contents of 3.6%, Dalia cheese with fat contents of 44%, butter with fat contents of 80% and margarine with fat contents of 24% after a heat treatment performed on cooking plate and microwave treatment, respectively of different durations. The biggest difference was obtained for oleic acid and elaidic acid since with the exception of the margarine in each case proportion of the cis-configurated oleic acid decreased while that of the trans-configurated elaidic acid increased. For all of the other fatty acids in the foodstuffs examined no such differences were obtained regarding change in fatty acid composition, which differences could influence healthy nutrition to considerable extent, therefore we can take it as a fact that neither heat treatment performed on a traditional cooking plate nor microwave treatment affects considerably the composition of food fats.

Author Biography

  • Rozália Veronika Salamon, University of Transylvania, Csíkszereda Campus, Department of Food Sciences, RO-530104 Csíkszereda, Szabadság tér 1.

    corresponding author
    salamonrozalia@sapientia.siculorum.ro

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Published

2007-10-15

Issue

Vol. 11 No. 3 (2007): Acta Agraria Kaposváriensis

Section

Articles

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Copyright (c) 2007 Salamon Rozália Veronika, Lóki Katalin, Salamon Szidónia, Albert Beáta, Mándoki Zsolt, Csapóné Kiss Zsuzsanna, Sára Péter, Borosné Győri Anikó, Győri Zoltán, Csapó János

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

How to Cite

Salamon, R. V., Lóki, K., Salamon, S., Albert, B., Mándoki, Z., Csapóné Kiss, Z., Sára, P., Borosné Győri, A., Győri, Z., & Csapó, J. (2007). Changes in fatty acid composition and conjugated linoleic acid contents of milk and dairy products caused by pure cultures as well as during microwave heat treatment. Acta Agraria Kaposváriensis, 11(3), 23-36. https://journal.uni-mate.hu/index.php/aak/article/view/1894

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