Transport Phenomena Laboratory, Department of Food Science and Engineering, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.
J Food Sci Technol. 2011 Dec;48(6):677-84. doi: 10.1007/s13197-010-0195-x. Epub 2010 Dec 25.
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.
石榴汁被稀释至 12°Brix,然后在喷雾干燥前加入不同浓度的纤维素作为载体(麦芽糊精、阿拉伯胶、蜡质淀粉)制成粉末。所有载体浓度都提高了干燥机的产量,其中阿拉伯胶的效果最显著。使用更高浓度的载体时,粉末的堆积密度会降低。随着溶液中纤维素浓度的增加,最终产品的溶解度降低。粉末的光学性质受到载体类型和浓度的影响;用阿拉伯胶制成的粉末颜色变化最大。添加载体增加了粉末的玻璃化转变温度(Tg)及其储存稳定性。花色苷的变化可能与载体剂的类型及其在喷雾干燥过程中的行为有关。