The harmonics of the response wave, the nonlinear dielectric properties of yeast cells, have particular patterns according to the biological activity of the cells, and the measurement of these patterns is a technique for determining the activity of living cells. In this study, we examined the generation of nonlinear dielectric properties by comparing data for the cases in which the cells were near and away from the electrodes with an electrochemical cell mounted with a membrane filter. Measurements were made with living yeast cells in the induction phase, the logarithmic growth phase, and the stationary phase, as well as with sterilized yeast cells.
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