The detailed composition of the emulsions used in the
experiment is given in Table 1. Prior to experimental emulsions
preparation the concentration of guar gum for the
low fat emulsion was chosen by sensory evaluation of the emulsion’s viscosity with various levels of guar gum (0.6–
0.9%) as matched to the viscosity of the emulsion with
80% fat (as a standard). Concentration of 0.8% guar gum
(gg) was chosen as having the most similar viscosity to
the standard.
The emulsifying procedure was thoroughly standardized.
The emulsifier (egg yolk powder) was mixed with distilled
water (10 s), stabilizer (25 s) (in the case of 50% fat
emulsion), NaCl (10 s), and finally with oil (flow rate of
0.2 ml s1) and adequate amount of SF. A kitchen mixer
with a speed of 2000 r min1 was used for emulsification.
The emulsions were stored at 5 C for about 24 h before
evaluation.