In both Figs. 3 and 4, we also observed that after inoculation
the cells grew at successively increasing rates, and they eventually
grew at 0.56 h
−1
, the μ
. Besides, the time needed to
reach μ
max
max
increased with increasing agitator speed. In other
words, the cells needed a longer time to adapt themselves to
an environment of higher shear force; nevertheless, neither the
extent of cell growth nor the HA yield changed with changing
shear force