The change in pH at 4 C was significantly influenced by starter
and storage time for both yoghurt types (p < 0.0009) (Fig. 1). A
significant interactionwas observed for set yoghurt between starch
and storage time (p ¼ 0.003). The set yoghurts without starch had
similar pH values among all starters except LB1, which had a higher
pH value after 2 days. For the set yoghurts with starch, those fermented
with the control and LB1 starters had significantly higher
pH values than those fermented with the other starters after both 2
and 8 days. For all starters, the pH values decreased significantly
during the storage period for the set yoghurts with starch. For the
stirred yoghurts pH values were different according to starter, LB1
and LB2 having higher pH values overall but all strains showed a pH
reduction overtime.