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Immobilised yeast cells biosensor for total toxicity testing

L Campanella1, G Favero, M Tomassetti

  • 1Dipartimento di Chimica, Università La Sapienza, Rome, Italy.

The Science of the Total Environment
|October 27, 1995
PubMed
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A novel yeast biosensor offers a sensitive method for total toxicity testing. This tool detects various pollutants by measuring the impact of toxic substances on yeast respiratory activity.

Area of Science:

  • Environmental Science
  • Biotechnology
  • Analytical Chemistry

Background:

  • Assessing environmental toxicity requires reliable methods to detect diverse pollutants.
  • Biosensors offer a sensitive and rapid approach for environmental monitoring.

Purpose of the Study:

  • To develop and validate an immobilised yeast cell biosensor for total toxicity testing.
  • To utilize Saccharomyces cerevisiae's respiratory activity as an indicator of pollutant presence.

Main Methods:

  • Immobilising Saccharomyces cerevisiae on an agar gel medium.
  • Employing an amperometric gas diffusion oxygen electrode to measure respiratory perturbation.
  • Using glucose as a substrate to challenge the yeast's metabolic activity.

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Main Results:

  • The biosensor effectively detected toxicity from metallic ions, phenol, and surfactants.
  • Perturbation of yeast respiratory activity correlated with the presence of toxic substances.
  • The immobilised yeast biosensor demonstrated sensitivity in total toxicity assessment.

Conclusions:

  • The developed yeast biosensor is a viable tool for comprehensive environmental toxicity testing.
  • This method provides a sensitive and efficient means to monitor water quality and pollutant levels.