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Effect of rice--glycerol complex medium on the production of Lovastatin by Monascus ruber
1Department of Food Engineering, Da-Yeh University, Changhua, Taiwan 515, Republic of China. nelson@mail.dyu.edu.tw
Abstract:
Response surface methodology (RSM) was employed to study the effect of the composition of the rice-glycerol complex medium on the production of lovastatin (Lvs) by the ascomycete Monascus ruber in mixed solid-liquid (or submerged) cultures at 25 degrees C. Four components (rice powder, peptone, glycerol, glucose) were studied to evaluate the approximate polynomial for all dependent variables, explaining their effects on the production of Lvs. The best composition derived from RSM regression was (in g/L) rice powder 34.4, peptone 10.8,, glucose 129, KNO3 8.0, MgSO4.7H2O 4.0 and glycerol 36.4 mL/L. With this composition, the Lvs production was 157 mg/L after 10 d of cultivation. In comparison with glycerol and glucose, the rice powder becomes a more suitable carbon source and represents a great potential for the production of Lvs.
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