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Coulis de glace dans les organismes biologiques : étude sur la capacité de nucléation bactérienne de la glace.

Ice slurry in biological organisms: the investigation of INA: bacterial ice nucleation ability.

Auteurs : ZWIEG T., ARLANDIS G. T., CUCARELLA V., et al.

Résumé

The application of ice slurry as secondary refrigerant or in food preservation is known and well described. However, ice slurry plays also in the nature an important role. Animals and plants are living in polar and alpine regions of the earth, where the outside temperature for long time periods drops far below zero. Liquid water is necessary for all life processes. These organisms have therefore developed a number of exciting and surprising biochemical mechanisms involving the ice slurry generation in order to adapt to their environment and hereby to survive the low temperatures. The actual findings in this subject are described and a model for the biological extracellular ice crystallisation mechanism is worked out. Experiments using an automated lag-time apparatus were made to determine the supercooling point of selected ice nucleating active bacteria under different conditions. The obtained results are supporting the developed model.

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Détails

  • Titre original : Ice slurry in biological organisms: the investigation of INA: bacterial ice nucleation ability.
  • Identifiant de la fiche : 2006-3212
  • Langues : Anglais
  • Source : Proceedings of the sixth Workshop on Ice Slurries of the IIR/Proceedings of the Second Conference on Phase Change Material and Slurry (PCM 2005).
  • Date d'édition : 15/06/2005

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