title: Optimizing spray drying conditions of sour cherry juice based on physicochemical properties, using response surface methodology (RSM).
abstract: In this study, the effects of main spray drying conditions such as inlet air temperature (100-140 °C), maltodextrin concentration (MDC: 30-60%), and aspiration rate (AR) (30-50%) on the physicochemical properties of sour cherry powder such as moisture content (MC), hygroscopicity, water solubility index (WSI), and bulk density were investigated. This investigation was carried out by employing response surface methodology and the process conditions were optimized by using this technique. The MC of the powder was negatively related to the linear effect of the MDC and inlet air temperature (IT) and directly related to the AR. Hygroscopicity of the powder was significantly influenced by the MDC. By increasing MDC in the juice, the hygroscopicity of the powder was decreased. MDC and inlet temperature had a positive effect, but the AR had a negative effect on the WSI of powder. MDC and inlet temperature negatively affected the bulk density of powder. By increasing these two variables, the bulk density of powder was decreased. The optimization procedure revealed that the following conditions resulted in a powder with the maximum solubility and minimum hygroscopicity: MDC = 60%, IT = 134 °C, and AR = 30% with a desirability of 0.875.
authors.affiliation: Department of Health, Science and Research Branch, AJA University of Medical Sciences, Tehran, Iran.
authors.forename: Arasb Dabbagh
authors.initials: AD
authors.lastname: Moghaddam
authors.affiliation: Department of Health, Science and Research Branch, AJA University of Medical Sciences, Tehran, Iran.|Department of Food Science, Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
authors.forename: Milad
authors.initials: M
authors.lastname: Pero
authors.affiliation: Transfer Phenomena Laboratory (TPL), Department of Food Science, Engineering and Technology, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
authors.forename: Gholam Reza
authors.initials: GR
authors.lastname: Askari
keywords: Fruit juice powder; Optimization; Physicochemical properties; Response surface methodology (RSM); Sour cherry; Spray drying