Article (Scientific journals)
Optimization of ultrasound-assisted osmotic dehydration of pomegranate seeds (Punica granatum L.) using response surface methodology
Bchir, B.; Bouaziz, M. A.; Ettaib, R. et al.
2020In Journal of Food Processing and Preservation, 44 (e14657), p. 1-17
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Keywords :
Dehydration; Differential scanning calorimetry; Drying; Food preservation; Physicochemical properties; Plants (botany); Surface properties; Ultrasonics; X ray powder diffraction; Antioxidant properties; Bioactive compounds; Dehydration kinetics; Experimental values; Pretreatment methods; Response surface methodology; Thermal characteristics; Ultrasound pre treatments; Osmosis
Abstract :
[en] The main objective was to investigate the effect of ultrasound-assisted osmotic dehydration (UOD) pretreatment on the dehydration kinetics and the physicochemical properties of pomegranate seeds using a response surface methodology, in order to optimize the process. Quality attributes of seeds were estimated through the assessment of physical and thermal characteristics. Results showed a good correlation of experimental values with the model. The optimum conditions used for UOD and osmotic dehydration (OD) were found to be 240 min, 60°Brix, 41°C, and 240 min, 29°Brix, 50°C, respectively. UOD pretreatment led to a higher mass transfer rate than the OD process. UOD-treated seeds reached the optimal moisture content (10%) and water activity (aw < 0.650) faster than both fresh seeds and OD-treated seeds. Differential scanning calorimetry revealed that UOD pretreatment induced the loss of an important amount of water. X-ray diffraction analysis showed that ultrasound pretreatment did not affect the amorphous characteristics of pomegranate seed powder during drying. Practical applications: Ultrasound-assisted osmotic dehydration could be a novel approach for food preservation and processing, due to the combined effect of osmotic pressure gradient and ultrasonic effect on the surface of the food material. Ultrasound pretreatment can be implemented as an alternative pretreatment to reduce drying time and, consequently, processing costs. Ultrasound-assisted osmotic dehydration is gradually gaining attention as a pretreatment method due to its advantages which include preservation of antioxidant properties and bioactive compounds. This study provides information on the application of response surface methodology for the optimization of ultrasound-assisted osmotic dehydration of pomegranate seeds. © 2020 Wiley Periodicals LLC.
Disciplines :
Food science
Author, co-author :
Bchir, B.;  Laboratory of Analysis Valorization and Food Safety, University of Sfax, National Engineering School of Sfax, Sfax, Tunisia
Bouaziz, M. A.;  Laboratory of Analysis Valorization and Food Safety, University of Sfax, National Engineering School of Sfax, Sfax, Tunisia
Ettaib, R.;  Laboratoire d'Aridoculture et Cultures Oasiennes, Institut des Régions Arides, Médenine, Tunisia
Sebii, H.;  Laboratory of Analysis Valorization and Food Safety, University of Sfax, National Engineering School of Sfax, Sfax, Tunisia
Danthine, Sabine  ;  Université de Liège - ULiège > Département GxABT > SMARTECH
Blecker, Christophe ;  Université de Liège - ULiège > Département GxABT > SMARTECH
Besbes, S.;  Laboratory of Analysis Valorization and Food Safety, University of Sfax, National Engineering School of Sfax, Sfax, Tunisia
Attia, H.;  Laboratory of Analysis Valorization and Food Safety, University of Sfax, National Engineering School of Sfax, Sfax, Tunisia
Language :
English
Title :
Optimization of ultrasound-assisted osmotic dehydration of pomegranate seeds (Punica granatum L.) using response surface methodology
Publication date :
2020
Journal title :
Journal of Food Processing and Preservation
ISSN :
0145-8892
eISSN :
1745-4549
Publisher :
Blackwell Publishing Ltd
Volume :
44
Issue :
e14657
Pages :
1-17
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 June 2021

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