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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 ± 0.04a 112.20 ± 0.01a
MetE 36.56 ± 0.02b 62.74 ± 0.01b
DcmMetE 59.13 ± 0.02c 150.41 ± 0.02c
AlkE -c) -
Fractions b   
HexF 203.78 ± 0.03d 314.30 ± 0.04d
ChlF 230.15 ± 0.04e 249.82 ± 0.02e
EtAcF 117.77 ± 0.04f 249.33 ± 0.03e
nBuF 42.07 ± 0.03g 74.23 ± 0.03f
WatF 33.66 ± 0.04h 65.02 ± 0.03g
Controls   
L-Ascorbic acid 4.65 ± 0.02i 2.26 ± 0.04h
Trolox 9.71 ± 0.04j 16.46 ± 0.02i
  1. 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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