The emulsifying properties of Brea gum (BG), the exudate from Cercidium praecox, were studied in
comparison to gum Arabic (GA). Droplet size distributions, rheological properties and stability of corn oil
emulsion stabilized with BG and GA solutions were analyzed. The results showed that an increase in BG
concentration led to a decrease in Z-average diameter and to an increase in emulsion apparent viscosity
and stability. All emulsion flow curves presented shear-thinning behavior at low shear rates and Newtonian
plateau at high shear rates. The mechanical spectra showed droplets tending to arrange as a
network in the emulsions which was related to the high stability. BG emulsion presented higher viscosity
and stability than GA emulsion at the same concentration suggesting that BG could replace GA in some
industrial applications