Antioxidant Activities of Stilbenoids from Rheum emodi Wall

Table 3

Linear regression analysis of dose-response data from ferric to ferrous reduction assay for different compounds.

	PICE	PICG	RES	POD	EDA	Vc
Slop	1.2535	0.4839	0.5018	0.1825	0.4548	1.2267
Intercept	23.779	14.191	14.599	13.273	14.615	20.764
r	0.9966	0.9998	0.9968	0.9973	0.9952	0.9966
AAE	1.022	0.394	0.409	0.149	0.371	1.000

AAE, namely, ascorbic acid equivalence, is the slope ratio calculated with Vc as reference.