RESULTS AND DISCUSSION
Physicochemical Properties of Yoghurt: Table 1
shows some physicochemical properties of yogurt
prepared from protein isolates extracted from Lagenaria
siceraria seed flours. The pH of the yogurt samples
varied significantly (P ≤ 0.05). The pH of the yogurt
ranged from 4.02 to 4.60. This range in pH compared
with the range of 4.55 to 4.62 reported for low fat
probiotic yogurt (Mazloomi et al., 2011). Addition of
protein isolates generally reduced the pH of resultant
yogurt. This may be due to increased protein content in
the yogurt resulting into increased proteolysis by the
proteolytic bacteria (Lactobacillus bulgaricus and
Streptococcus thermophilus) thereby causing production
of more lactic acid compared to the control.