Partager

Document IIF

Changements de texture et de la composition en pectine des tranches de fraises déhydrocongelées et décongelées : influence des différents traitements préalables de déshydratation.

Texture and pectin composition changes of dehydrofreeze-thawed strawberry slices: influence of different dehydration pretreatments.

Auteurs : LO SCALZO R., BRIMAR H., LEVA A. A., et al.

Résumé

Prefreeze dehydration has been applied to strawberry in order to reduce structure collapse at thawing and the changes produced at structural level have been studied through both texture and pectin composition analysis. Partial (60%) removal of water before freezing of strawberry slices (10 mm) was by air dehydration, and by air dehydration preceded by a 60 min osmotic step in sucrose (60% wt/wt): not predehydrated fruit were used as control. Not predehydrated strawberry showed the lowest texture values at thawing, together with the greatest loss of protopectins. No differences before and after freezing in texture were observed for either of the predehydrated strawberry. Yet strawberry air dehydrated without osmosis had the biggest changes of dimethylsulphoxide-soluble and oxalate soluble pectin fractions. Considering both texture and pectin composition, strawberry air-dehydrated after osmosis are the least affected by freezing, confirming the stabilizing effect of added sucrose on pectins.

Documents disponibles

Format PDF

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Texture and pectin composition changes of dehydrofreeze-thawed strawberry slices: influence of different dehydration pretreatments.
  • Identifiant de la fiche : 2005-0274
  • Langues : Anglais
  • Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Date d'édition : 17/08/2003

Liens


Voir d'autres communications du même compte rendu (398)
Voir le compte rendu de la conférence

Indexation