the texture of frozen dairy products is related to the ability of the protein-fat matrix to form a cohesive network to yield a uniform fat-liquid emulsion. Both milk fat and milk solids composition play an important role in its stability and structure.
The results illustrate that the addition of inulin (A mainly soluble dietary fibre) alters the texture of yog-ice cream samples. The viscosity of the mixes with added inulin show significant increases (Figure 1). Consistency indexes (Power Law model with r = 0.91 average confidence of fit) of the yog-ice cream samples (Figure 1) reveal increases in the viscosity of yog-ice cream mixes from low fat to high fat, and in relation to the proportion of inulin concentration. Increased viscosity in the low fat samples containing inulin can be explained by the interactions of the dietary fibre and liquid components of the yog-ice cream mix.
Inulin, being highly hygroscopic, would bind water and form a gel-like network that, in addition to the other components, would modify the rheology of the mix. Additionally, the use of a viscous acid-formed protein-gel added as stirred yogurt may contribute. to the formation of the ice-cream systemใ