took the maximum value at the cell concentration of 0.62
and 0.58 g dm−3 of MOT-pHUC and MOT-pHC, respectively; thereafter, decreased slowly as the cells reached the stationary phase of
the growth. The highest OUR values were determined as 0.0020 and
0.0022 mmol dm−3 s−1 at pHUC and pHC, respectively.