THEORETICAL AND EXPERIMENTAL RECOVERY OF OSCILLATIONS DURING BATCH YEAST GROWTH IN A PURE CULTURE SUBJECT TO NUTRITIONAL STRESS

A new model is proposed for the recovery of the complete cell growth dynamics, and showed to compare well with new experiments that we conducted for a pure culture of the T206 strain of Saccharomyces cerevisiae. The proposed model results show that the batch yeast growth in a limited nutrient medium (5% grape juice) is associated with substantial oscillations, which damp out over time. Additional results obtained by using the proposed model show the recovery of effects that are frequently encountered in experiments such as a "Lag Phase" as well as an inflection point in the "ln curve" of the cell concentration. The proposed model recovers also the logistic growth curve as a special case.

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