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Fig. 2 | Biotechnology for Biofuels

Fig. 2

From: Simultaneous consumption of cellobiose and xylose by Bacillus coagulans to circumvent glucose repression and identification of its cellobiose-assimilating operons

Fig. 2

Co-fermentation of glucose/xylose or cellobiose/xylose mixtures for lactic acid production by B. coagulans NL01. Green, glucose; Dark yellow, cellobiose; Blue, xylose; Magenta, lactic acid. Fermentations were carried out in 250-mL Erlenmeyer flasks containing 100-mL medium at 50 °C and 150 rpm on a rotary shaker. The medium contained the following (g/L): glucose 5 and xylose 5 (a)/cellobiose 5 and xylose 5 (b)/glucose 40 and xylose 40 (c)/cellobiose 40 and xylose 40 (d), yeast extract 2.5, corn syrup powder 1.2, MgSO4·7H2O 0.4, (NH4)2SO4 3, KH2PO4 0.22, MnSO4·H2O 0.03, FeSO4·H2O 0.03, and CaCO3 at 1/2 of the added sugar by weight. Values are the average of three independent experiments ± SD

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