Table 4.
ABTS and DPPH radical scavenging ability (RSA), reducing power of burdock root tea treated by steaming, drying, roasting methods

Measurement1)	ABTS radical scavenging ability (%)	DPPH radical scavenging ability (%)	Reducing power (OD700)
HDR	75.13±1.962)b3)	81.88±0.47b	0.61±0.02b
SHD	62.10±1.10c	65.25±0.92c	0.49±0.02c
SHDR	85.66±2.77a	92.11±1.46a	0.76±0.02a

The concentration of positive control (BHT : butylated hydroxytoluene) solutions were measured at 50 mg%, and all test sample were measured at 500 mg%
Values are means standard deviation of triplicate determinations
Different superscripts within a column (a-c) indicate significant differences (p<0.05).