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Application of impedimetry for rapid estimation of bacterial contamination of pre-cut chilled vegetables and prediction of their microbiological shelf-life.

Author(s) : MOHÁCSI-FARKAS C., FARKAS J., REICHART O., SÁRAY T., MÉSZÁROS L.

Summary

Total aerobic plate counts of unirradiated and 1 kilo gray-irradiated, aerobically packaged pre-cut bell pepper and carrot cubes were followed during post-irradiation storage at various temperatures between 1 and 16°C. The same samples used for plate counting were inoculated into Don Whitley broth and conductimetric measurements were performed at 30°C for 48 hours. The logarithm of the total aerobic viable cell counts showed good linear correlation with the conductimetric detection time (TTD-) values in the range of 1000 to 100 CFU/g millions and the cell count reducing effect of low-dose irradiation did not seem to influence much this correlation. Equations were calculated from the data pairs, which expressed log CFU values as a linear function of TTD with statistically significant determination coefficients.

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Pages: p 237-244

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Details

  • Original title: Application of impedimetry for rapid estimation of bacterial contamination of pre-cut chilled vegetables and prediction of their microbiological shelf-life.
  • Record ID : 2000-0261
  • Languages: English
  • Source: Predictive Microbiology Applied to Chilled Foods Preservation
  • Publication date: 1997/06/16
  • Document available for consultation in the library of the IIR headquarters only.

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