Table 2.
Minimal inhibitory concentration and percentual bacteriostatic efficiency of isolated chalcones and of chalcones-oxacillin combinations against a methicillin-resistant Staphylococcus aureus strain.
| Chalcone | MIC (comb) | PBE (isolated) | PBE(comb) | |
|---|---|---|---|---|
| 1 | 11.2 | 6.33 | < | 8.93 |
| 2 | 22.4 | 2.22 | << | 4.46 |
| 3 | 15.3 | 4.97 | << | 6.53 |
| 4 | 22.5 | 3.25 | < | 4.44 |
| 5 | 73.9 | 2.35 | >>> | ≈ 0 |
1: 2´,3- dihydroxychalcone; 2: 2´,4- dihydroxychalcone; 3: 2´,4´- dihydroxychalcone; 4: 2´,4´,3- trihydroxychalcone; 5: 2´,4´-dihydroxy-3 ´-methoxychalcone. MIC: minimal inhibitory concentration.