The pH was practically the same at the end of the exponential
phases in RSM and irrRSM (6.31 0.01 and 6.24 0.01, respectively).
Taking into account that practically the same amounts of
heat (numbers of bacteria) were produced during the exponential
growth phase, equality of the pH at the end of the exponential
growth phase could be considered as an indication that pH was the
factor terminating the fast growth. However, the high values of pH
observed cannot support this conclusion.