Iranian Research Organization for Science and Technology (IROST) Innovative Food Technologies 2783-350X 1 2 2013 12 22 Modeling apparent density during drying of plums pretreated with ultrasound and osmotic dehydration Modeling apparent density during drying of plums pretreated with ultrasound and osmotic dehydration 23 38 26 10.22104/jift.2013.26 FA Rasoul Ghorbani M. Sc. Graduate Student, Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz Jalal Dehghannya Assistant Professor, Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz Seiied-Sadegh Seiiedlou-Heris Assistant Professor, Department of Agricultural Machinery, Faculty of Agriculture, University of Tabriz Babak Ghanbarzadeh Associate Professor, Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz Journal Article 2013 09 17 In this study, the effect of ultrasound and osmotic dehydration pretreatments on apparent density changes of plums during drying at 80°C temperature and 1.4 m/s air velocity was examined. Pretreatments including ultrasound time at two levels (10 and 30 minutes), osmotic solution concentrations at two levels (50 and 70 Brix) and osmotic process time at four levels (60, 120, 180 and 240 min) were performed. Afterwards, apparent density modeling were carried out through existing models in the literature as well as proposed models in this study. Then, one of the models was selected as the most suitable model in predicting apparent density of plums under the experimental conditions. Results showed that application of ultrasound and osmotic dehydration increased apparent density in comparison with control samples Moreover, increasing ultrasound time, osmotic solution concentration and osmotic process time led to an increase in apparent density. In this study, the effect of ultrasound and osmotic dehydration pretreatments on apparent density changes of plums during drying at 80°C temperature and 1.4 m/s air velocity was examined. Pretreatments including ultrasound time at two levels (10 and 30 minutes), osmotic solution concentrations at two levels (50 and 70 Brix) and osmotic process time at four levels (60, 120, 180 and 240 min) were performed. Afterwards, apparent density modeling were carried out through existing models in the literature as well as proposed models in this study. Then, one of the models was selected as the most suitable model in predicting apparent density of plums under the experimental conditions. Results showed that application of ultrasound and osmotic dehydration increased apparent density in comparison with control samples Moreover, increasing ultrasound time, osmotic solution concentration and osmotic process time led to an increase in apparent density. https://jift.irost.ir/article_26_acd421cb9f5de4da13e0f646973c61af.pdf