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Table 2 Effect of crude extract and solvent fractions of R. anthopogonoides on different free radical scavenging assays

From: Antioxidant potential, total phenolic and total flavonoid contents of Rhododendron anthopogonoides and its protective effect on hypoxia-induced injury in PC12 cells

Extract/fractions EC50 value (μg/ml) of radical scavenging
DPPH racidal ABTS radical Superoxide radical Hydroxyl radical Nitric oxide radical
Crude extract 63.73 ± 0.95d 69.96 ± 0.92c 483.00 ± 2.65d 204.65 ± 4.26c 197.38 ± 4.25d
Hexane 259.65 ± 13.04e 168.64 ± 2.50d >1000 468.93 ± 16.17f >1000
Ethyl acetate 61.78 ± 0.11c 53.36 ± 0.53b 433.33 ± 7.68b 240.39 ± 2.50d 183.83 ± 2.34c
n-butanol 53.11 ± 0.12b 71.32 ± 0.50c 270.67 ± 0.58a 145.87 ± 0.83b 151.34 ± 3.67b
water 278.35 ± 1.4e 345.22 ± 12.62e >1000 232.95 ± 2.87e >1000
Ascorbic acid 30.39 ± 0.23a 18.51 ± 0.13a 450.32 ± 6.28c 50.73 ± 1.83a 126.72 ± 7.24a
  1. Each value represents as mean ± SD of triplicate experiments. Values in the same column followed by a different letter (a–f) are significantly different (p < 0.05)