Lower coating temperatures, 60 and 70 C, and lower feed rate
of coating solution showed greater carotenoid encapsulation as
compared to 80 C. Flowability of solid particles inside of the bed
chamber plays an important role on the coating efficiency. Degradation
of encapsulated b-carotene showed a direct relationship
with color parameters. Coating at 70 C and 7 g/min showed better
film formation since higher protection of b-carotene and vivid color
were observed during storage of coated powder at different temperatures.
The yogurt colored with coated powders, after 4 weeks
of storage, showed minimal changes in color (DE < 3), demonstrating
that the encapsulating agents and process conditions
provided color stability in acidic media for up to 4 weeks of storage
at refrigeration temperature.