Fig. 2. Time courses of lactic acid production (a) and cell growth (b) in
batch lactic acid fermentation from molasses supplemented with different
concentrations of yeast extract. Initial molasses concentration was 200 g/l,
equivalent to 102 g/l total sugar. () 5 g/l of yeast extract; () 10 g/l of yeast
extract; () 15 g/l of yeast extract; () 20 g/l of yeast extract.