The Effects of Iranian Gum Tragacanth on the Foaming Properties of Egg White Proteins in Comparison with Guar and Xanthan Gums

ABSTRACT: This paper presents the results of studies concerned with the preparation of fresh food foams based on egg white and various hydrocolloids including Iranian gum tragacanth, guar and xanthan gums at different concentrations (0.002-0.040% w/w). The basic physical parameters of the obtained foams such as overrun, stability and morphology of gas bubbles were measured. Viscosity measurements were also performed, and Power law model was applied to describe the flow behavior of gum solutions. The addition of hydrocolloids into the egg white solution had a deteriorative effect on the foam expansion but enhanced the foam stability. In addition, ANOVA showed that by increasing the concentration of the hydrocolloids in egg white solution significantly decreased the overrun and foam drainage (p