Vedecký časopis

48 2009

Journal of Food and Nutrition Research
Súhrny čísla 4 / 2009

Composition of conjugated linoleic acid isomers formed by Lactobacillus and Bifidobacterium spp. in conversion media
Journal of Food and Nutrition Research, 48, 2009, č. 4, s. 163-170

Elena Panghyová, VÚP Food Research Institute Bratislava, Biocentrum, Kostolná 7, SK - 900 01 Modra, Slovakia. E-mail: panghyova@vup.sk

Súhrn: The ability to produce conjugated linoleic acid (CLA) by bacteria Lactobacillus plantarum, Lactobacillus acidophilus and Bifidobacterium lactis was studied. In conversion media with neutral pH containing the detergent Tween 80, CLA was produced at 0.3 mg•g-1 – 0,5 mg•g-1 (dry mass). Presence of Tween 80 was essential for conversion of linoleic acid to CLA. Also, pH of the conversion medium affected CLA contents and the proportion of individual isomers (cis-9, trans-11 CLA, trans-10, cis-12 CLA, trans-9, trans-11 CLA). At pH lower than 6.5, contents of CLA isomers ranged between 0.04 mg•g-1 and 0.44 mg•g-1 (dry mass). At pH lower than 6.5, more trans-10, cis-12 isomer and also trans-9, trans-11 isomer was formed. Isomer trans-9, trans-11 was formed probably at isolation of fatty acids from the biomass and/or at their esterification.

Kľúčové slová: conjugated linoleic acid; Lactobacillus; Bifidobacterium; pH; isomer; Tween 80

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