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LOW-TEMPERATURE THERMAL BEHAVIOUR OF WATER IN HETEROGENEOUS SYSTEMS.

Author(s) : MURASE N., GONDA K., WATANABE T.

Summary

THE THERMAL BEHAVIOUR OF CROSS-LINKED POLYMER-WATER SYSTEMS, USED AS MODELS OF BIOLOGICAL SYSTEMS, WERE INVESTIGATED. WATER OR AN AQUEOUS SOLUTION COMPARTMENTALIZED BY THE NETWORK STRUCTURE OF POLYMERS WAS N THE PRESENCE OF UNFROZEN COMPARTMENTALIZED WATER MAY BE CAUSED BY A SUDDEN CHANGE OF NETWORK STRUCTURE DURING COOLING WHEN SOME PART OF WATER IN GELS FREEZES. MELTING MAY CAUSE A GRADUAL CHANGE OF NETWORK STRUCTURE WHICH MAY TRIGGER THE CRYSTALLIZATION OF ICE. IN THE CASE OF GELS MADE OF POLYMERS WITHOUT CROSS-LINKAGE, THE CRYSTALLIZATION DURING WARMING WAS NOT OBSERVED. FOR BIOLOGICAL MATERIALS IT SHOULD BE TAKEN INTO CONSIDERATION THAT WATER ONLY COMPARTMENTA-LIZED, NOT STRONGLY BOUND, CAN BE UNFROZEN.

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Details

  • Original title: LOW-TEMPERATURE THERMAL BEHAVIOUR OF WATER IN HETEROGENEOUS SYSTEMS.
  • Record ID : 1987-0773
  • Languages: English
  • Source: Fundamentals and Applications of Freeze-Drying to Biological Materials, Drugs and Foodstuffs.
  • Publication date: 1985/05/20
  • Document available for consultation in the library of the IIR headquarters only.

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