Table 1 DPPH and ABTS radical scavenging activities of Asparagus cochinchinensis (Lour.) Merr. (Asparigi radix) extracts after gamma-irradiation at designated doses

Irradiation dose	DPPH radical	ABTS radical
0 kGy	77.5±3.5a	32.5±3.5a
5 kGy	50.6±2.6a	25.2±2.1a
10 kGy	42.4±2.1b	17.5±1.6b
20 kGy	35.7±1.2b	12.5±1.3c
Ascorbic acid	1.2±0.5	-
Trolox	-	0.3±0.4

^a–c Different letters within the same column differ significantly (p<0.05).