Table 4.
Antibacterial activity of red perilla extracts from plants treated with zinc oxide nanoparticles (ZnO NPs).
| Treatment | Extract Concentration (%) | The Number of Bacterial Cells (105 CFU/mL) |
|
|---|---|---|---|
| S. aureus | E. coli | ||
| Control | 50 | 0 | 0 |
| 25 | 5.50 ± 0.71 b * | 2.50 ± 0.57 b | |
| 50 mg L−1 ZnO NPs | 50 | 0 | 0 |
| 25 | 2.60 ± 0.99 c | 4.20 ± 0.01 a | |
| 100 mg L−1 ZnO NPs | 50 | 0 | 0 |
| 25 | 2.05 ± 0.78 c | 1.20 ± 0.71 c | |
| 200 mg L−1 ZnO NPs | 50 | 0 | 0 |
| 25 | 16.60 ± 2.33 a | 4.25 ± 0.15 a | |
| The number of bacterial cells for positive control (109 CFU/mL) | 1.28 ± 0.04 | 6.00 ± 1.70 | |
* Values are mean ± SEM for n = 3. Logarithm values within a column marked with the same letter are not significantly different at p ≤ 0.05 based on Tukey’s test.