BMC Complementary Medicine and Therapies

Table 3 Antioxidant activities of extracts and fractions from S. spinosa

From: Some Strychnos spinosa (Loganiaceae) leaf extracts and fractions have good antimicrobial activities and low cytotoxicities

Samples	IC₅₀(μg/ml)
	DPPH	ABTS
Extracts ^a
AcetE	95.42 ± 0.04^a	112.20 ± 0.01^a
MetE	36.56 ± 0.02^b	62.74 ± 0.01^b
DcmMetE	59.13 ± 0.02^c	150.41 ± 0.02^c
AlkE	-^c)	-
Fractions ^b
HexF	203.78 ± 0.03^d	314.30 ± 0.04^d
ChlF	230.15 ± 0.04^e	249.82 ± 0.02^e
EtAcF	117.77 ± 0.04^f	249.33 ± 0.03^e
nBuF	42.07 ± 0.03^g	74.23 ± 0.03^f
WatF	33.66 ± 0.04^h	65.02 ± 0.03^g
Controls
L-Ascorbic acid	4.65 ± 0.02ⁱ	2.26 ± 0.04^h
Trolox	9.71 ± 0.04^j	16.46 ± 0.02ⁱ

^a)AcetE: Acetone extract, MetE: Methanol extract, DcmMetE: Dichloromethane/methanol extract, AlkE: Alkaloids extract, ^b)HexF: n-hexane fraction, ChlF: Chloroform fraction, EtAcF: Ethyl acetate fraction, nBuF: n-Butanol fraction, WatF: Water fraction, ^c)no concen- trations decreasing 50% DPPH or ABTS. Values with different letters are significantly different at p < 0.05.

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ISSN: 2662-7671

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