Preparation of yoghurt: Milk was pasteurized at 63EC for
30 min according to Attia et al. (2001), then cooled to 43EC
followed by the addition of one of the following starter
cultures (Streptococcus thermophilus and Lactobacillus
delbruckii sub spp., bulgaricus, YC-X11 Thermophilic Yoghurt
Culture-Yo-Flex CHR HANSEN, Denmark; S1) for texture and
CH-1 Thermophilic Yoghurt Culture-Yo-Flex CHR HANSEN,
Denmark; S2) for acidity and flavor. Then the incubation was
carried out into plastic cups at 43EC until, the formation of the
coagulum (5-17 h). After that the yoghurt samples were stored
at 4EC for 29 days. The chemical composition evaluation was
performed once every 4 days.