Bioactivity and Toxicity of Senna cana and Senna pendula Extracts

Table 3

Antioxidant activity of Senna extracts.

Extracts	DPPH assay (IC50 µg·mL^−1)^a	ABTS assay (TEAC)^b	FRAP assay (EC mg/mL)^c	ORAC assay (units)^d
BEESC	87.5 ± 0.01	1398.1 ± 0.03	828.2 ± 0.02	2.06 ± 0.01
LEESC	59.5 ± 0.01	4440.4 ± 0.01	304.8 ± 0.04	4.72 ± 0.03
BEESP	62.1 ± 0.04	4886.7 ± 0.03	329.17 ± 0.01	5.01 ± 0.04
LEESP	70.6 ± 0.02	3963.1 ± 0.09	520.87 ± 0.01	3.83 ± 0.07
FEESP	64.08 ± 0.02	3927.5 ± 0.02	982.56 ± 0.01	2.58 ± 0.01
BHT	350.1 ± 0.03	—	—	—
RUTIN	81.2 ± 0.04	—	485.1 ± 0.07	3.75 ± 0.05

^aIC₅₀: content of the extract able to inhibit 50% of DPPH radicals. ^bTEAC: antioxidant activity equivalent to trolox (µmol TE. g⁻¹ dry weight). ^cEC: content (mg·mL⁻¹) capable of providing an increase in the absorbance reading equivalent to that obtained with a 1 mM solution of Fe(II). ^dORAC units represent inhibition of fluorescence quenching induced by 1 mmol·L⁻¹ of trolox.