Table 2.

FRAP activity of ursolic acid and thujone.

Concentration (µg/mL)	FRAP (OD values)∗
	Ursolic acid	Thujone	Ascorbic acid	BHA
20	0.543 ± 0.006a	0.084 ± 0.016a	0.305 ± 0.007a	0.885 ± 0.007a
40	0.827 ± 0.006b	0.366 ± 0.009b	0.593 ± 0.006b	1.360 ± 0.006b
60	1.037 ± 0.006c	0.923 ± 0.023c	0.988 ± 0.010c	2.133 ± 0.011c
80	1.357 ± 0.006d	1.078 ± 0.015d	1.505 ± 0.040d	2.510 ± 0.009d
100	1.427 ± 0.170d	1.451 ± 0.005e	2.134 ± 0.012e	2.993 ± 0.005e

^∗The values are mean of triplicates with (±) standard deviation (mean ± S.D; n = 3). Different superscript letters (a–e) in column within treatments indicate significant differences (at p < 0.05) when subject to Tukey's multiple comparison test.