Fig. 1 also shows that the general tendencies of particle size and
zeta potential evolutions were the same for both diluted systems
with or without CMC, strongly suggesting that the presence of fat
does not influence the dissociation of caseins from micelles and the
absorption of CMC onto the casein micelles during acidification.
However, the numerical values of particle size for diluted whole
milk were much larger than those for diluted skim milk, which can
be reasonably related to the presence of fat globules.