Research Article
Improvement of D-Ribose Production from Corn Starch Hydrolysate by a Transketolase-Deficient Strain Bacillus subtilis UJS0717
Table 2
Effect of the initial pH on D-ribose production performance by B. subtilis UJS0717.
| | Initial pH | Initial glucose
(g/L) | Residual glucose
(g/L) | Glucose consumption
rate (%) | Glucose consumption
rate (g/L·h) | Cell concentration
(g/L) | D-Ribose
(g/L) | D-Ribose yield
(g/g) | D-Ribose productivity
(g/L·h) |
| | 6.0 | 122.0 | 11.25 ± 0.12 | 90.78 ± 0.10 | 1.54 ± 0.00 | 7.95 ± 0.15 | 30.92 ± 0.47 | 0.28 ± 0.00 | 0.43 ± 0.00 | | 6.5 | 122.0 | 8.95 ± 0.05 | 92.66 ± 0.04 | 1.57 ± 0.00 | 8.60 ± 0.25 | 31.35 ± 0.35 | 0.28 ± 0.00 | 0.43 ± 0.00 | | 7.0 | 122.0 | 4.50 ± 0.35 | 96.31 ± 0.29 | 1.63 ± 0.00 | 8.70 ± 0.32 | 36.00 ± 0.75 | 0.31 ± 0.00 | 0.50 ± 0.00 | | 7.5 | 122.0 | 6.85 ± 0.18 | 94.39 ± 0.15 | 1.60 ± 0.00 | 8.35 ± 0.35 | 34.57 ± 0.55 | 0.30 ± 0.00 | 0.48 ± 0.01 | | 8.0 | 122.0 | 8.55 ± 0.14 | 92.99 ± 0.11 | 1.57 ± 0.00 | 8.15 ± 0.25 | 31.76 ± 0.68 | 0.28 ± 0.00 | 0.44 ± 0.00 |
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compared to pH 6.0 group.
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