Activated yeast are exposed to serial concentrations of household bleach. Carbon dioxide production by the yeast is used to determine the lethal dose. This provides a fast an inexpensive means for students to apply the principle of dose-response to different pollutants. The fermentation vials were obtained from the Carolina Biological Supply (Basic Fermentation BioKit). The write-up for this activity is provided in this lab manual for environmental science:

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Environmental Science Labs

Antonio R. Chaves

Most of these hands-on activities involve common and inexpensive items. For more ideas like this you can visit my website:

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