Fig. 7

Fed-batch fermentation of E. coli DH5α in TB medium supplemented with 10 g/L of glycerol as initial carbon source. After complete depletion of glycerol, glycerol was fed at 3 g/L/h. Concentrations of acetate, mevalonate, and glycerol were determined by HPLC and (−)-α-bisabolol content was measured using GC. Canola oil 10% (v/v) instead of n-dodecane 20% (v/v) was used to overlay 30 L TB medium in a 50 L fermenter