2.2.Methods
2.2.1.Mayonnaise preparation. The recipes of the full
fat (FF) mayonnaise as control and the low fat (LF)
mayonnaise are shown in table 1. Mayonnaise was
prepared using Multiquick 5 kitchen machine K700
(Braun GmbH, Germany). The FF mayonnaise was
prepared by mixing the dried egg yolk and water
together thoroughly for 3 min. to reconstitute the egg
yolk fully. Then all the dry ingredients (i.e. salt,
sugar, sodium benzoate and potassium sorbate) were
added and mixed for 2 min. The mustard was then
added and mixed for 30 sec. Antioxidant was added
to all mayonnaise samples (240 mg α-tocopherol per
Kg mayonnaise). The α-tocopherol was dissolved in
sunflower oil (FF control) and added gradually while
mixing at 2000 rpm. After adding all the oil, vinegar
and fresh lemon juice gradually to the mixture it was
mixed for 3 min. Finally, the resulted mayonnaise
was mixed again for 5 min. The LF mayonnaise was
prepared using the same method of FF mayonnaise
except that the hydrocolloid gum was added to water
to turn it into gel, mixed thoroughly with the other
ingredients for 5 min before adding the oil to achieve
the proper texture.