Everett and McLeod (2005)also found
similar results in stirred skim-milk yoghurt mixed with adsorbing
anionic hydrocolloids, viz. low methoxyl pectin (LMP) and lcarrageenan and explained that at the higher levels of LMP, the
protein (casein) flow units are increasingly covered with this
polysaccharide and the casein aggregates are partially sterically
stabilized. This will reduce the effective volume fraction, reducing
viscosity, and increasing water holding capacity as the casein
network begins to lose structural integrity and expel serum phase.
On the contrary, it was found that the set-type yoghurts added with
commercial inulin (0.5e1.5 g/100 g) had significantly higher
apparent viscosities than the control (Donkor et al., 2007).