3.4.1. Syneresis
Gel formation of milk proteins is an important step in yogurt. LFyogurts
are known to have certain problems such as syneresis and
texture. Syneresis is the shrinkage of the gel, which then leads to
whey separation (Lucey, 2004; McCann et al., 2011; Ramchandran
& Shah, 2010). Syneresis evaluation results are presented in
Fig. 2. Control showed a higher syneresis (p < 0.05) compared to
supplemented yogurts during storage. The lowest syneresis was
observed with yogurt D (1%) followed by the other concentrations
in decreasing order. Syneresis occurs due to the loss of the ability of
the yogurt gel to retain all of the serum phase because of weakening
of the gel network. Casein micelles aggregate through isoelectric
precipitation by the action of lactic acid bacteria. The casein
strands can be broken and the size of the aggregates decreases.
Syneresis and the rearrangement of proteins occurs during storage