... 180–190 min in the rate of CO2 production, in the CO 2 acceleration and in optical density (Creanor and Mitchison, 1989 ), whereas the division cycle times were down to about 90 min. As a result, the increases in acceleration were not step-wise doublings and there were periods when the acceleration...

.... The nature of the control of these rate doublings is unknown but it cannot be doublings in protein content, which take appreciably longer after shift-up than the rate doublings ( Table 1 ). Table 2. Specific rate and acceleration of CO2 production Table 2 gives the specific rate...