Table 4.
Antioxidant potential of H. maculatum, H. richeri, H. olympicum and H. barbatum extracts.
| Source | ||||
| 7 (H. maculatum) | 8 (H. richeri) | 9 (H. olympicum) | 10 (H. barbatum) | |
| Free radical scavenging capacity (IC50 values presented in μg/mL) | ||||
| DPPH (IC50 values) | 4.10 ± 0.05 | 5.01 ± 0.07 | 3.80 ± 0.04 | 2.91 ± 0.09 |
| Trendline equation | y = 10.59x + 6.542 | y = 10.39x − 2.037 | y = 11.74x + 5.341 | y = 17.34x − 0.519 |
| R-Squared value | R2 = 0.982 | R2 = 0.977 | R2 = 0.994 | R2 = 0.993 |
| OH (IC50 values) | 70.09 ± 0.21 | 42.90 ± 0.15 | 59.74 ± 0.18 | 62.35 ± 0.25 |
| Trendline equation | y = 11.881ln(x) − 0.4923 | y = 14.056ln(x) − 2.8353 | y = 12.77ln(x) − 2.2295 | y = 11.616ln(x) + 1.9937 |
| Squared value (R2) | R2 = 0.9642 | R2 = 0.961 | R2 = 0.9501 | R2 = 0.9871 |
| NO (IC50 values) | 112.23 ± 0.24 | 155.73 ± 0.29 | 201.09 ± 0.22 | 79.62 ± 0.19 |
| Trendline equation | y = 25.647ln(x) − 71.067 | y = 23.101ln(x) − 66.617 | y = 0.2719x − 4.6752 | y = 16.855ln(x) − 23.779 |
| Squared value (R2) | R2 = 0.951 | R2 = 0.9508 | R2 = 0.9592 | R2 = 0.9595 |
| Inhibition of LP (IC50 values presented in μg/mL) | ||||
| LP(IC50 values) | 29.90 ± 0.13 | 31.81 ± 0.09 | 39.46 ± 0.11 | 14.57 ± 0.07 |
| Trendline equation | y = 29.84ln(x) − 51.40 | y = 26.24ln(x) − 40.80 | y = 19.66ln(x) − 22.27 | y = 19.04ln(x) − 1.023 |
| Squared value (R2) | R2 = 0.995 | R2 = 0.977 | R2 = 0.977 | R2 = 0.969 |