Table 5.
Effect of temperature on four test indices of biosurfactant production from strain 3B-2.
| Temperature (°C) | Biomass (OD600) | Protein concentration (g/L) | Surface tension (mN/m) | Diameter of clear zone (cm) | Overall weight |
|---|---|---|---|---|---|
| 25 | 0.72 | 2.72 | 45.0 | 4.25 | 0.1587 |
| 28 | 0.62 | 2.90 | 34.6 | 6.50 | 0.4998 |
| 31 | 0.65 | 2.47 | 41.3 | 5.75 | 0.2217 |
| 34 | 0.55 | 1.82 | 47.0 | 4.25 | 0.0478 |
| 37 | 0.55 | 2.00 | 51.1 | 5.00 | 0.0720 |
| λmax | 5.2623 | 5.1926 | 5.2198 | 5.2157 | 5.21728 |
| CI | 0.0656 | 0.0481 | 0.0549 | 0.0539 | 0.05432 |
| RI | 1.12 | 1.12 | 1.12 | 1.12 | 1.12 |
| CR | 0.0585 | 0.043 | 0.0491 | 0.0481 | 0.0485 |
λmax = 4.0458, CI = 0.0153, RI = 0.9, CR = 0.017 (λmax: the maximal eigen value, CI: the consistency index, RI: the random index, CR: the consistency ratio).