Table 3.
Total phenolic and flavonoid content and antioxidant activity of AgNPs and the extracts before and after the AgNPs synthesis (mean values ± SD).
| Sample | Extracts (before Reaction) |
Supernatants (after Reaction) |
% Reduction |
|---|---|---|---|
| Total phenolic content (gallic acid equivalents mg/100 g of dry plant) | |||
| Dittany | 1.57 ± 0.07 | 1.47 ± 0.06 | 12.36 ± 4.28 |
| Sage | 1.22 ± 0.07 | 0.80 ± 0.02 | 37.00 ± 4.42 |
| Sea buckthorn | 1.24 ± 0.07 | 0.43 ± 0.01 | 66.02 ± 3.50 |
| Calendula | 0.59 ± 0.04 | 0.45 ± 0.01 | 24.15 ± 6.64 |
| Dittany | 1.57 ± 0.07 | 1.47 ± 0.06 | 12.36 ± 4.28 |
| Total flavonoid content (quercetin equivalents mg/100 g of dry plant) | |||
| Dittany | 1.47 ± 0.09 | 1.39 ± 0.16 | 15.32 ± 7.25 |
| Sage | 1.45 ± 0.12 | 1.16 ± 0.10 | 26.23 ± 3.28 |
| Sea buckthorn | 0.75 ± 0.05 | 0.62 ± 0.04 | 18.56 ± 3.61 |
| Calendula | 0.66 ± 0.06 | 0. 58 ± 0.10 | 24.16 ± 6.83 |
| Dittany | 1.47 ± 0.09 | 1.39 ± 0.16 | 15.32 ± 7.25 |
| Antioxidant activity of AgNPs, of the extracts, and the ascorbic acid expressed as IC50 (mg/mL) (mean values ± SD) | |||
| Sample | Extracts | AgNPs | |
| Dittany | 11.11 ± 0.30 | 1.92 ± 0.13 | |
| Sage | 15.05 ± 0.49 | 0.77 ± 0.04 | |
| Sea buckthorn | 18.43 ± 0.94 | 0.61 ± 0.07 | |
| Calendula | 69.29 ± 1.83 | 2.08 ± 0.29 | |
| NaBH4 | - | 0.69 ± 0.08 | |
| Ascorbic acid | 0.24 ± 0.00 | ||