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 3

Antioxidant capacity of the hydroxycinnamic acids found in sorghum and their interactions.

	TEAC			DPPH
	Real	Theoretical (sum)	Type of interaction	Real	Theoretical (sum)	Type of interaction
Individual
A (caffeic)	0.26 ± 0.02^b			0.38 ± 0.03^a
B (p-coumaric)	0.45 ± 0.02^a			0.02 ± 0.00^d
C (ferulic)	0.46 ± 0.04^a			0.22 ± 0.02^c
D (sinapic)	0.32 ± 0.03^b			0.29 ± 0.01^b
Interactions
AB	0.58 ± 0.02^b	0.71 ± 0.02^a	Antagonistic	0.34 ± 0.03^b	0.40 ± 0.00^a	Antagonistic
AC	0.62 ± 0.01^b	0.72 ± 0.04^a	Antagonistic	0.62 ± 0.04^a	0.60 ± 0.02^a	Additive
AD	0.43 ± 0.02^b	0.59 ± 0.03^a	Antagonistic	0.72 ± 0.02^a	0.67 ± 0.01^b	Synergistic
BC	1.06 ± 0.06^a	0.90 ± 0.04^b	Synergistic	0.22 ± 0.02^a	0.24 ± 0.02^a	Additive
BD	0.76 ± 0.05^a	0.77 ± 0.03^a	Additive	0.32 ± 0.02^a	0.31 ± 0.01^a	Additive
CD	0.80 ± 0.05^a	0.78 ± 0.03^a	Additive	0.53 ± 0.05^a	0.51 ± 0.01^a	Additive
ABC	0.99 ± 0.09^b	1.16 ± 0.03^a	Antagonistic	0.55 ± 0.04^b	0.62 ± 0.02^a	Antagonistic
ACD	1.04 ± 0.03^a	1.04 ± 0.06^a	Additive	0.86 ± 0.03^a	0.89 ± 0.03^a	Additive
BCD	1.13 ± 0.02^a	1.23 ± 0.06^a	Additive	0.46 ± 0.01^b	0.53 ± 0.03^a	Antagonistic
BDA	0.99 ± 0.03^a	1.03 ± 0.02^a	Additive	0.62 ± 0.03^a	0.69 ± 0.04^a	Additive
ABCD	1.32 ± 0.06^b	1.49 ± 0.04^a	Antagonistic	0.88 ± 0.03^a	0.91 ± 0.03^a	Additive

Each value is the mean of three replicates ± standard deviation (SD). The values for the individual standards with different letters in the same column and assay are significantly different (). The values for interactions between standards with different letters in the same file and assay are significantly different (). All units: μmol TE/mL. Different superscript letters in the same column represent significant differences () between individual hydroxycinnamic acids for TEAC or DPPH assay. Different superscript letters in the same row represent significant differences () between real and theoretical values for each assay and each combination of hydroxycinnamic acids.