. On the other hand,
the production rates of both cases were reduced by the expansion
of the liquid surface area. Fig. 9 shows the relation between
the cell surface density, which is defined as the dry cell weight at
the end of the culture divided by the surface area [g-DCW/cm2],
and the cordycepin productivity [(g-cordycepin)/(g-DCWd)] calculated
from the linear part of each time course in Fig. 4