the cells exhausted almost all of the sugars initially in the medium.During the first two days, the average biomass productivity was10.6 g/L-day and the average sugar utilization rate was 21.7 g/L-day. The cell yield was 0.48 g cells/g sugars. After 48 h, however, cellgrowth slowed down significantly though syrup was supplementedat 48 and 60 h, respectively. From day 2 to day 3, cell growth ratewas 2 g/L-day while total sugar utilization rate was 27.7 g/L-day.The low cell yield at this later stage could be due to lack of nutrientssince only sugars were added to the fermentor without nitrogenand other elements. Lipid content of the day 3 cells was 50.8 ± 0.3%measured by the conventional lipid extraction assay. The overalllipid yield was 0.20 g/g sugar which is close to the highest practicalyield of 0.20–0.22 g/g glucose [34