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Dissolved CO2 and its growth inhibiting effect on microorganisms in modified atmosphere packaging model systems. Licentiate thesis.

Author(s) : LOEWENADLER J.

Type of article: Periodical article

Summary

The ratio of headspace to medium volume and the buffering capacity of the medium were shown to be the major factors influencing solubility. Pseudomonas fragi and Yersinia enterocolitica were strongly affected by the CO2 concentration in the medium, in combination with chill temperature. The growth of Pseudomonas fragi was completely inhibited by 40 micromoles CO2/milliliter medium at 8 deg c, but only partly at 22 deg C. Yersinia enterocolitica had a great potential to grow in high CO2 concentration at low temperature. The pathogen was eventually inhibited by 79 micromol CO2/milliliter medium at temperature below 8 deg C. This finding shows the importance of measuring dissolved CO2 concentraton in modified atmosphere packaging systems in order to be able to dimension safe packages, which prevent growth of pathogens.

Details

  • Original title: Dissolved CO2 and its growth inhibiting effect on microorganisms in modified atmosphere packaging model systems. Licentiate thesis.
  • Record ID : 1997-0802
  • Languages: English
  • Source: SIK Rapp. - n. 604
  • Publication date: 1994

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