title: Effect of carrier type and spray drying on the physicochemical properties of powdered and reconstituted pomegranate juice (Punica Granatum L.).
abstract: Pomegranate juice was diluted to 12° Brix and carriers (maltodextrin, gum Arabic, waxy starch) were added with varying concentrations of cellulose before being reduced to powder by spray drying. All carrier concentrations improved dryer yield, with gum Arabic being the most effective. The bulk density of the powder decreased when higher carrier concentrations were used. As cellulose concentration increased in solution, the solubility of the final product decreased. The optical properties of the powder were affected by the type and concentration of the carrier; powders produced with gum Arabic showed the greatest color change. Adding a carrier increased the Tg of the powder and its storage stability. Variation in the anthocyanin may be related to the type of carrier agent and its behavior during spray drying.
authors.affiliation: Transport Phenomena Laboratory, Department of Food Science and Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.
authors.forename: Shima
authors.initials: S
authors.lastname: Yousefi
authors.forename: Zahra
authors.initials: Z
authors.lastname: Emam-Djomeh
authors.forename: S M
authors.initials: SM
authors.lastname: Mousavi
keywords: Glass transition temperature (Tg); Optical properties; Physicochemical properties; Pomegranate juice; Spray drying