[Growth kinetics of Escherichia coli and Saccharomyces cerevisiae cultured on membrane filters]. / Cinétiques de croissance de Escherichia coli et de Saccharomyces cerevisiae en culture sur membranes filtrantes.

ABSTRACT

The growth kinetics of Escherichia coli and Saccharomyces cerevisiae cultivated on Millipore membrane filters (MF) was studied. Exponential growth kinetics was observed for both microorganisms, but in the case of E. coli cultivated on 0.8 micron and 1.2 micron MF, a decrease in the growth rate compared to that observed in liquid medium was noted. On the other hand, S. cerevisiae was unable to grow on a MF belonging to some batches, whereas E. coli showed normal behavior towards these MF. These data underline the importance of the effect upon growth kinetics of the relative cell size proportionally to the size of the MF pores.