Yield coefficients in dependence on milieu conditions and cell states III. Induction of synchrony in continuous yeast cell cultivation by milieu changes

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Abstract
Induction of synchrony by various perturbations in continuous yeast cultivation on hydrocarbons of crude oil is described. Short-time temperature and pH-value shocks cause oscillations of budding cell percentage in the order of the cell cycle duration. An abrupt change of the phosphate ion concentration of the nutritional medium may also induce a synchronization of microbial growth. However, the frequency corresponds with the eigenfrequency of the fermentation process. The experimental values were investigated statistically using autocorrelation and spectral analysis.