Chemostatic Concentrated Cultures of Heteroploid Mammalian Cell Suspensions in Dialyzing Fermentors: I. Experimental Evidence and Theoretical Considerations

Concentrated chemostatic cultures of HeLa S3-1, KB, and HEp # 2 cells have been grown in a dialysis fermentor. Stationary cell concentrations of approximately 1.2 × 10⁶ cells per ml have been produced at rates of 15 × 10^-3 to 20 × 10^-3 cells per hour for as long as 40 days. The dialysis fermentor appears to be useful in controlling the effects of nutrients on the growth rate of the cultures. Theoretical considerations are offered.