The impact of biopolymer/saqez resin composites on hysicochemical properties of low fat yogurt

In this study the effect of Biopolymer/Saqez resin (SR) particle composites which were prepared by incorporating micronized SR particles alone and in combination with egg white, inulin, WPC and sodium caseinate biopolymers in yogurt gel matrices was evaluated. Microscopic observations were conducted to determine the structural features of the SR composites. The findings were combined with data on textural properties, syneresis and pH values to discuss the physicochemical properties of the yogurt gels, which differed substantially depending on the type of biopolymer involved in gel network structure development. A mechanism is put forward to explain the role of SR particles as filler materials of biopolymer gel matrices that can improve physicochemical properties of yogurt and its stability during storage time if incorporated with adapted biopolymers and if applicated alone doesn’t have good interaction with yogurt network . Among all used biopolymers Inulin and Egg white biopolymers have best inetractions with saqez resin and inhibited from flocculation of resin, in comparison with control samples (INY & EGY) they increased hardness and consistency at least 10 and 13 % respectively, decreased seneresis at least 2% and pH maintained constant in storage time.