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The influence of water activity on the stability of vulgaxanthin I

Einfluß der Wasseraktivität auf die Stabilität von Vulgaxanthin I

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Zusammenfassung

Die Stabilität von Vulgaxanthin I hängt von der Aktivität des Wassers im System ab. Die Halbwertszeit von Vulgaxanthin I war beia w = 0,20 dreimal so groß wie beia w = 1,00. Die Verteilungskoeffizienten für die Zersetzung von Vulgaxanthin I in Abhängigkeit von der Wasseraktivität zeigen einen exponentiellen Zusammenhang, so daß die Stabilität bei Werten füra w kleiner 0,50 nicht mehr zunahm.

Summary

The stability of vulgaxanthin I at 100 °C is dependant on the water activity of the system. The half-life of vulgaxanthin I was found to be three times greater ata 1 0.20 than at 1.00. The rate constants for vulgaxanthin I degradation varied exponentially with respect to water activity and belowa w=0.50 the stability was not improved.

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Authors and Affiliations

  1. Technical Research Centre of Finland, Food Research Laboratory, Biologinkuja 1, SF-02150, Espoo 15

    Karin Savolainen & Heikki Pyysalot

  2. Dept. of Chemistry and Biochemistry, University of Turku, SF-20500, Turku 50, Finland

    Heikki Kallio

Authors
  1. Karin Savolainen
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  2. Heikki Pyysalot
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  3. Heikki Kallio
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Savolainen, K., Pyysalot, H. & Kallio, H. The influence of water activity on the stability of vulgaxanthin I. Z Lebensm Unters Forch 167, 250–251 (1978). https://doi.org/10.1007/BF01135597

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  • DOI: https://doi.org/10.1007/BF01135597

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