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Table 3 Antioxidant capacities of the crude ethanolic extract of S. asper leaves and its fractions determined by the DPPH and ABTS scavenging assays

From: Acid-base fractions separated from Streblus asper leaf ethanolic extract exhibited antibacterial, antioxidant, anti-acetylcholinesterase, and neuroprotective activities

Sample DPPH scavenging assay ABTS scavenging assay
%Radical Scavenging activity (of 1 mg/mL sample) mg VCEAC/g dry weight sample %Radical Scavenging activity (of 1 mg/mL sample) mg VCEAC/g dry weight sample
Crude extract 16.58 ± 1.33a 18.37 ± 1.25a 37.69 ± 1.81a 31.52 ± 1.63a
Neutral fraction 8.94 ± 0.78b 10.63 ± 1.38b 34.29 ± 1.56b 29.02 ± 1.43b
Acidic fraction 17.16 ± 1.74a 18.88 ± 1.39a 48.45 ± 1.55c 39.45 ± 1.43c
Basic fraction 8.94 ± 1.62b 10.00 ± 0.77b 39.23 ± 0.66a 32.66 ± 0.84a
  1. Results are expressed as mean ± SD of at least three replicates
  2. Different superscript letters in the same column indicate a significant difference between the means by one-way ANOVA (p < 0.05) and the same letter indicates that there is no statistical difference