. 2013 Oct 1;13:243. doi: 10.1186/1472-6882-13-243

Table 2.

Radical scavenging activity of the crude and fractionated extracts of Alpinia pahangensis against DPPH radical

Extracts and standards	IC₅₀values (mg/ml)
Crude methanol	0.579 ± 0.017 ^c
Hexane	2.677 ± 0.094 ^e
Ethyl acetate	0.349 ± 0.009 ^b
Water	0.999 ± 0.038 ^d
Ascorbic acid	0.015 ± 0.600 ^a
BHA	0.013 ± 0.600 ^a

IC₅₀ values expressed are mean ± standard deviation of triplicate measurements. Means with different letters (a-e) in the same column are significantly different (p < 0.05). BHA and Ascorbic acid were used as standards.