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Vapour pressure of aqueous antifreeze glycopeptide solutions.

Author(s) : WESTH P., RAMLOV H., WILSON P. W., DEVRIES A. L.

Type of article: Article

Summary

Measurements are reported of the vapour pressure of liquid, partially frozen and frozen aqueous solutions of antifreeze glycopeptides at temperatures ranging from -1 to 0 deg C. Results indicate that the activity of water in liquid or partially frozen solutions is approximately the same as the activity of pure supercooled water. In a completely frozen solution, water activity is equal to that of pure ice. The data show that the antifreeze peptides only affect bulk properties of liquid as well as frozen solutions to a very limited extent. The inhibiting effect of these molecules on ice formation is an entirely kinetic phenomenon.

Details

  • Original title: Vapour pressure of aqueous antifreeze glycopeptide solutions.
  • Record ID : 1998-1673
  • Languages: English
  • Source: Cryo-Letters - vol. 18 - n. 5
  • Publication date: 1997/09
  • Document available for consultation in the library of the IIR headquarters only.

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