Partager

Document IIF

Caractérisation de la re-cristalisation dans les crèmes glacées pendant l'entreposage en utilisant les mesures de réflectance d'un faisceau concentré.

Characterization of ice recrystallization in ice cream during storage using the focused beam reflectance measurement.

Numéro : pap. 180

Auteurs : NDOYE F. T., ALVAREZ G.

Résumé

Ice recrystallization was investigated in two commercial and differently formulated ice creams using a rapid and real time granulometric method: the focused beam reflectance measurement. Ice cream A (with locust bean gum as primary stabilizer)
and ice cream B (with carrageenan as primary stabilizer) were stored for 154 days at four different temperatures (-5, -8, -12 and -18°C) and three amplitudes of temperature fluctuations (± 0.1°C, ± 0.75°C, ± 2.5°C). Crystal size distribution was assessed at regular time intervals and recrystallization kinetic data was derived by fitting the experimental results to the asymptotic Ostwald ripening model. As expected, recrystallization rates increase with mean storage temperature and amplitude of temperature fluctuations. Carrageenan seems to be more effective than LBG in slowing down ice crystal growth during storage. Mean ice crystal size increased as a function of time1/3 for both ice creams. The temperature dependence of recrystallization rate fitted Arrhenius well, with activation energies fairly similar for both ice creams.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Characterization of ice recrystallization in ice cream during storage using the focused beam reflectance measurement.
  • Identifiant de la fiche : 30012055
  • Langues : Anglais
  • Source : 3rd IIR International Conference on Sustainability and the Cold Chain. Proceedings: London, UK, June 23-25, 2014
  • Date d'édition : 23/06/2014

Liens


Voir d'autres communications du même compte rendu (87)
Voir le compte rendu de la conférence

Indexation