Table 2.

Antioxidant activity of C. latifolia extract by beta carotene bleaching assay.

Sample	Percentage of inhibition (%) in a concentration (µg/mL) of:						IC50 (µg/mL)
	6.25	12.5	25	50	100	200
REE	4.11 ± 0.05	10.79 ± 1.08	28.13 ± 0.56	48.11 ± 1,96	73.03 ± 0.88	–	62.05*b
SEE	6.80 ± 0.23	8.91 ± 0.4	17.76 ± 0.13	42.98 ± 0.53	74.91 ± 1.22	–	64.97*a
LEE	22.34 ± 0.87	29.67 ± 1.35	39.38 ± 2.13	42.50 ± 0.98	59.43 ± 0.39	–	70.55*b
REAE	38.44 ± 1.36	45.83 ± 0.97	59.93 ± 0.39	67.83 ± 1,3	82.15 ± 1.12	–	14.81*e
SEAE	39.96 ± 1.33	48.23 ± 1.10	50.55 ± 0.64	67.29 ± 0.75	80.44 ± 0.88	–	19.42*d
LEAE	8.66 ± 0.77	9.69 ± 0.89	37.77 ± 1.25	56.58 ± 5.19	82.16 ± 5.16	–	51.34*
RHE	–	2.25 ± 0.14	9.96 ± 0.26	23.96 ± 0.61	44.65 ± 1.42	86.29 ± 4.60	115.1*h
SHE	–	17.09 ± 1.12	18.63 ± 0.74	23.50 ± 0.40	47.23 ± 0.48	75.48 ± 1.27	118.7*g
LHE	–	15.08 ± 0.92	19.53 ± 0.59	40.76 ± 0.87	63.17 ± 0.87	85.49 ± 0.61	94.92*
BHT*	IC50 (0.55)*
Quercetin*	IC50 (43.38)*

Note: *Concentration series on positive control BHT (0.2 to 1 µg/mL) and quercetin (10 to 50 µg/mL). The percentage inhibition (%) of lipid peroxidation at each concentration is described as mean ± SD (n = 3). With a Tukey HSD of p ≤ 0.05, the data indicate a significant difference (*). ^abc..There was no extensive difference in data from the alphabetical order at p ≤ 0.05 (Tukey HSD).