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Table 2 Yields and kinetic parameters obtained during chemostat cultivations

From: Specific growth rate and substrate dependent polyhydroxybutyrate production in Saccharomyces cerevisiae

Feeding component Dilution rate Y sx Y sEtOH Y sPHB Ethanol accumulation Y xPHB
h -1 Cmol/Cmol Cmol/Cmol Cmmol/Cmol Cmol/L mg/gDW
Glucose 0.05 0.51 ± 0.01 - 2.51 ± 0.07 0 4.33 ± 0.19
0.10 0.57 ± 0 - 3.67 ± 0 0 5.59 ± 0
0.15 0.36 ± 0.02 0.02 ± 0 2.44 ± 0 - 5.94 ± 0.64
0.20 0.29 ± 0 0.1 ± 0 1.92 ± 0 - 5.59 ± 0.23
Ethanol 0.05 0.45 ± 0.01 0 8.50 ± 0.23 0 16.55 ± 0.02
0.10 0.37 ± 0 - 4.94 ± 0.58 0.0964 ± 0 13.49 ± 0
0.15 0.12 ± 0.01 - 0.46 ± 0.05 0.2364 ± 0 5.30 ± 0.31
Glucose: Ethanol (1:2) 0.05 0.48 ± 0.02 0 9.97 ± 0.07 0 18.34 ± 0.53
0.10 0.38 ± 0 - 7.41 ± 0 0.2012 12.41 ± 0
0.15 0.30 ± 0 - 2.57 ± 0.1 0.1637 7.50 ± 0.19
0.20 0.22 ± 0 - 1.13 ± 0 0.2769 4.56 ± 0
  1. The values were calculated from duplicate fermentations and are represented as mean ± SD. The formula for biomass used in this calculation is CH1.8O0.5 N0.2. Ysx = biomass yield on substrate, YsEtOH = ethanol yield on substrate, YsPHB = PHB yield on substrate, YxPHB = PHB yield per biomass.
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