Table 4.
HEp-2 cell viability at different concentrations of oregano essential oil (OEO) and biological silver nanoparticles (bio-AgNP) in combination.
| Combination | Tested concentrations | Viable cells (%) | |
|---|---|---|---|
| OEO (mg/mL) | bio-AgNP (μM) | ||
| A1 | 0.596 | 125.0 | 0.95 ± 0.69 |
| A2 | 0.596 | 62.50 | 1.36 ± 0.59 |
| A3 | 0.596 | 31.25 | 0.99 ± 0.15 |
| A4 | 0.596 | 15.62 | 1.27 ± 0.40 |
| B1 | 0.298 | 125.0 | 1.18 ± 0.20 |
| B2 | 0.298 | 62.50 | 1.72 ± 0.57 |
| B3 | 0.298 | 31.25 | 1.04 ± 0.20 |
| B4 | 0.298 | 15.62 | 1.99 ± 4.64 |
| C1 | 0.149 | 125.0 | 7.80 ± 2.00 |
| C2 | 0.149 | 62.50 | 21.81 ± 12.19 |
| C3 | 0.149 | 31.25 | 22.94 ± 14.00 |
| C4 | 0.149 | 15.62 | 72.01 ± 17.60NC |
| D1 | 0.075 | 125.0 | 38.68 ± 8.49 |
| D2 | 0.075 | 62.50 | 51.61 ± 3.25 |
| D3 | 0.075 | 31.25 | 94.24 ± 3.67 NC |
| D4 | 0.075 | 15.62 | 100 ± 0.00NC |
| E1 | 0.037 | 125.0 | 61.54 ± 6.92NC |
| E2 | 0.037 | 62.50 | 82.27 ± 10.55NC |
| E3 | 0.037 | 31.25 | 100 ± 0.00NC |
| E4 | 0.037 | 15.62 | 100 ± 0.00NC |
Concentrations of OEO (mg/mL) in combination: A, 0.596; B, 0.298; C, 0.149; D, 0.075; E, 0.037.
Concentrations of bio-AgNP (μM) in combination: (1) 125; (2) 62.5; (3) 31.25; (4) 15.62.
NC
, non-cytotoxic, ±, standard deviation.