Poster (Scientific congresses and symposiums)
Osmotic dehydration of pomegranate seeds (PUNICA GRANATUM L.)
Bchir, Brahim; Besbes, Souhail; Attia, Hamadi et al.
2013Knowledge for Growth is organized by FlandersBio
 

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Keywords :
Osmotic dehydration; pomegranate seeds; Mass transfert
Abstract :
[en] Osmotic dehydration of pomegranate seeds was carried out at different temperatures (30, 40, 50°C) in a 55°Brix solution of sucrose, glucose, and mixture sucrose & glucose (50:50 wt/wt). The most significant changes of water loss and solids gain took place during the first 20 min of dewatering. During this period, seeds water loss was estimated to 46% in sucrose, 37% in glucose and 41% in mix glucose/sucrose solution. The increase of temperature favoured the increase of water loss, weight reduction, solids gain and effective diffusivity. Differential scanning calorimetry data provided complementary information on the mobility changes of water and solute in osmodehydrated pomegranate seeds. The ratio between % frozen water and % unfreezable water decreased from 5 to 0.5 during the process. That involving the presence of very tightly bound water to the sample, which is very difficult to eliminate with this process. It also appeared that glass transition temperature depends on the types of sugar.
Disciplines :
Agriculture & agronomy
Author, co-author :
Bchir, Brahim ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Besbes, Souhail
Attia, Hamadi
Paquot, Michel ;  Université de Liège - ULiège > Chimie et bio-industries > Chimie biologique industrielle
Blecker, Christophe ;  Université de Liège - ULiège > Chimie et bio-industries > Science des alim. et formul.
Language :
English
Title :
Osmotic dehydration of pomegranate seeds (PUNICA GRANATUM L.)
Publication date :
30 May 2013
Event name :
Knowledge for Growth is organized by FlandersBio
Event organizer :
FlandersBio
Event place :
Gent, Belgium
Event date :
30 Mai 2013
By request :
Yes
Audience :
International
Available on ORBi :
since 31 May 2013

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