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| Concentration (μg ml−1) | Cell viability after 48 h (%) |
|---|---|
| 75 | 98.2 ± 1.2 |
| 100 | 97.5 ± 1.5 |
| 200 | 96.2 ± 1 |
| 300 | 95.4 ± 0.5 |
