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.
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