Table 3.
Antioxidant activity of Rhododendron luteum Sweet extracts. The results of 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay (DPPH), antiradical capacity determination with 2,2′-azino-bis-3(ethylbenzthiazoline-6-sulphonic acid) (ABTS) and Oxygen Radical Absorbance Capacity (ORAC) assay are expressed as mg TE (Trolox equivalents)/g of dry extract. The results of chelating power assay are expressed as mg Na2EDTA equivalents/g of dry extract. Abbreviations as in Table 1.
| Sample | DPPH (mg TE/g) |
ABTS (mg TE/g) |
ORAC (mg TE/g) |
Chelating Power (mg Na2EDTA/g) |
|---|---|---|---|---|
| RL40C-M | 275.00 ± 6.57 | 88.79 ± 2.15 | 758.65 ± 31.81 | 6.22 ± 0.29 |
| RL80C-M | 287.39 ± 14.77 | 133.58 ± 7.23 | 1011.59 ± 50.93 | 5.28 ± 0.13 |
| RL140C-M | 537.42 ± 31.32 | 232.56 ± 11.21 | 940.99 ± 25.08 | 5.84 ± 0.19 |
| RL40C-80M | 300.69 ± 0.74 | 108.87 ± 5.06 | 495.77 ± 23.27 | 6.13 ± 0.22 |
| RL80C-80M | 414.48 ± 23.43 | 312.83 ± 4.87 | 987.42 ± 38.74 | 7.08 ± 0.13 |
| RL140C-80M | 528.29 ± 7.04 | 217.74 ± 9.11 | 985.72 ± 33.93 | 6.44 ± 0.06 |
| RL40C-W | 234.18 ± 0.50 | 285.71 ± 0.86 | 602.80 ± 27.68 | 2.76 ± 0.12 |
| RL80C-W | 621.90 ± 1.67 | 349.41 ± 12.73 | 704.45 ± 26.15 | 4.13 ± 0.21 |
| RL140C-W | 457.37 ± 17.00 | 312.73 ± 8.98 | 686.54 ± 19.94 | 2.78 ± 0.02 |
Mean values of three replicate assays with standard deviation.