Table 2.

IC ₅₀ values of different antioxidant assays of extract and various fractions of S. cordata

Activity	IC 50 (μg/ml)
	SCME	SCHE	SCEE	SCBE	SCAE	Standard a
DPPH scavenging activity	235±1.4c	795±5.3a	135±1.2e	147±1.4d	275±3.2b	25±1.1f
Hydrogen peroxide scavenging activity	272±1.8c	469±2.7b	154±2.3e	223±2.1d	622±3.7a	99±2.2f
Hydroxyl radical scavenging activity	298±2.1c	578±4.2a	189±1.5d	206±1.3e	455±4.1b	32±0.9f
ABTS scavenging activity	259±0.9a	260±2.1a	143±0.8d	224±1.4c	236±2.2b	55±1.3e
Anti lipid per oxidation activity	212±3.1c	276±2.6b	119±1.0e	153±1.1d	314±2.8a	31±0.8f
β -carotene bleaching activity	221±1.7c	647±3.9a	153±1.1d	156±1.7d	249±1.6b	35±1.7e
Superoxide radical scavenging activity	139±2.0c	197±2.3b	114±1.3d	136±2.1c	242±3.1a	41±2.3e

Values are expressed as mean±SD (N=3), ^a=Ascorbic acid. Means with superscripts with different letters in the rows are significantly (P<0.05) different from each other. (SCHE); n-hexane fraction, (SCEE); ethyl acetate fraction, (SCBE); n-butanol fraction, (SCAE), aqueous fraction.