Article (Scientific journals)
Osmotic Dehydration Kinetics of Pomegranate Seeds Using Date Juice as an Immersion Solution Base
Bchir, Brahim; Besbes, Souhail; Karoui, Romdhane et al.
2010In Food and Bioprocess Technology
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Keywords :
Pomegranate; Osmotic dehydration; Scanning electron microscopy
Abstract :
[en] Pomegranate seeds were osmodehydrated using date juice added with sucrose (final °Brix, 55) as immersion solution. The kinetics of osmotic dehydration showed that the most significant changes of mass transfer took place during the first 20 min of the process, regardless of date juice <br />varieties. During this time, seed water loss and solid gain were estimated to be ∼39% and ∼6%, respectively. After 20 min of the process, the percentage of water loss and solid gain varied slightly and ranged on average close to ∼40% and ∼9%, respectively. During osmotic dehydration, there was a leaching <br />of natural solutes from seeds into the solution, which is <br />quantitatively not negligible, and might have an important <br />impact on the sensorial and nutritional value of seeds and date <br />juices. Both scanning electron microscopy and texture <br />(compression) analysis revealed that osmotic dehydration <br />process induced modifications of seed texture and cell <br />structure. Sucrose was found to be the essential element which <br />influences the texture of seed and the viscosity of date juice. <br />Additionally, natural sugar present in date juice permits <br />substituting 35% of the total quantity of sucrose added to the <br />osmotic solution.
Research center :
University of Liege, Gembloux Agro-Bio Tech, Laboratory of Food Sciences and Formulation
Disciplines :
Agriculture & agronomy
Food science
Author, co-author :
Bchir, Brahim ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Besbes, Souhail
Karoui, Romdhane
Paquot, Michel 
Attia, Hamadi
Blecker, Christophe ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Language :
English
Title :
Osmotic Dehydration Kinetics of Pomegranate Seeds Using Date Juice as an Immersion Solution Base
Publication date :
19 September 2010
Journal title :
Food and Bioprocess Technology
ISSN :
1935-5130
eISSN :
1935-5149
Publisher :
Springer, New York, United States - New York
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 January 2011

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