Table 1. Comparison of radical scavenging activities of purpurogallin by gamma-irradiation dose

Irradiation dose (kGy)	SC₅₀ values (μg/mL)
Irradiation dose (kGy)	DPPH	ABTS⁺	Hydroxyl
0 (control)	17.7±0.3^a1)	12.4±0.4^a	35.1±0.4^a
10	15.5±0.4^a	10.7±0.2^a	30.9±0.3^a
25	12.8±0.5^b	4.8±0.3^b	25.1±0.2^c
50	10.8±0.1^c	3.5±0.1^c	24.5±0.6^c
100	12.7±0.3^b	6.6±0.2^b	27.3±0.5^b

Scavenging activities are expressed as the mean±SD of triplicate experiments. Different letters (^a-c) within the same column indicate significant differences (p<0.05).