| Concentration of oil in μl/30 ml | 1 μl/30 ml | 5 μl/30 ml | 10 μl/30 ml | 20 μl/30 ml | 40 μl/30 ml | 80 μl/30 ml |
| Concentration of oil | 0.0133% | 0.0167% | 0.033% | 0.066% | 0.133% | 0.266% |
| M. piperta oil | 358 ± 2 | 242 ± 2 | 226 ± 0 | 198 ± 1 | 198 ± 1 | 198 ± 1 |
| C. citratus oil | 367 ± 2 | 262 ± 2 | 241 ± 1 | 225 ± 3 | 198 ± 1 | 198 ± 1 |
| T. vulgaris oil | 379 ± 2 | 331 ± 4 | 257 ± 0 | 234 ± 3 | 198 ± 1 | 198 ± 1 |
| O. majoranum oil | 381 ± 3 | 334 ± 1 | 259 ± 2 | 238 ± 1 | 198 ± 1 | 198 ± 1 |
| Negative control | 397 ± 0.5 | 397 ± 2 | 397 ± 3 | 397 ± 4 | 397 ± 4 | 397 ± 4 |
| Positive control | 390 ± 4 | 370 ± 2 | 287 ± 1 | 252 ± 3 | 230 ± 4 | 221 ± 4 |