Contribution and Interactions of Hydroxycinnamic Acids Found in Bran and Wholegrain Sorghum (Sorghum bicolor L. Moench): Effects on the Antioxidant Capacity and Inhibition of Human Erythrocyte Hemolysis

Table 2

Linear regression and IC₅₀ of hydroxycinnamic acids in the antioxidant capacity assays and the inhibition of erythrocyte hemolysis.

HCA	DPPH			ABTS			% Hemolysis inhibition
	Equation	R^2	IC50	Equation	R^2	IC50	Equation	R^2	IC50
Caffeic		0.881	0.20		0.987	0.38		0.942	2.46
p-Coumaric		0.892	>7.5		0.938	0.28		0.978	4.55
Ferulic		0.934	0.63		0.986	0.29		0.929	2.54
Sinapic		0.987	0.38		0.975	0.34		0.976	0.66

HCA: hydroxycinnamic acid; IC₅₀: half of the maximum inhibitory concentration, expressed as μmol of HCA/mL.