Efecto de la microencapsulación sobre las propiedades reológicas y fisicoquímicas del yogurt blando

Abstract

In this paper the influence of Lactobacillus acidophilus microencapsulation using a gelling binary system, in obtaining of soft yogurts, was studied, evaluating bromatological and rheological parameters. The results show that L. acidophilus microencapsulation increases viscosity and viscoelastic yogurt characteristics. However, the sensory analysis conducted did not show differences between yoghurt elaborated with L. acidophilus microencapsulated and yoghurt in free state. With respect to the physicochemical analysis, changes in the lactose, fat and protein values suggest an increase in the metabolic activity by L. acidophilus microencapsulated, which is evidenced by the increasing number of bacterial cells obtained at the end of the incubation period. Therefore, bacterial microencapsulation can be an interesting technique to perform the inclusion of probiotic bacteria in acidic food systems, without causing loss of the sensory attributes of the food product.