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| Concentrations (µg/ml) | 3.125 | 6.25 | 12.5 | 25 | 50 | 100 |
| cell viability (% of control) | a94.76± 0.43 | 87.97±0.25 | 63.56±0.34 | 25.88±0.25 | 22.21±0.28 | 17.76±0.21 |
* Percentage of cell survival within 24 (a) hours
