| Inorganic inducer | different density | |||
| CuSO4 (mmol/L) | 0.01 | 0.02 | 0.03 | 0.04 |
| FeSO4 (mmol/L) | 0.02 | 0.035 | 0.05 | 0.075 |
| Li2SO4 (mg/l) | 0.5 | 1 | 1.5 | 2 |
| MnSO4 (mmol/L) | 1 | 3 | 5 | 7 |
| CaSO4 (mg/l) | 0.05 | 0.1 | 0.15 | 0.2 |
| H2O2 (mmol/L) | 3 | 6 | 9 | 12 |