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Table 4 Antioxidant activities demonstrated by Streptomyces sp. NMF6 extract expressed as ascorbic acid equivalents

From: Isolation and characterization of marine sponge–associated Streptomyces sp. NMF6 strain producing secondary metabolite(s) possessing antimicrobial, antioxidant, anticancer, and antiviral activities

Sample mass (μg) *Ascorbic acid equivalent (μg)
DPPH assay Phosphomolybdenum assay Ferric-reducing power assay
25 3.37 ± 0.28 2.36 ± 0.19 1.91 ± 0.14
50 5.84 ± 0.29 4.10 ± 0.04 2.79 ± 0.23
75 7.96 ± 0.10 5.28 ± 0.30 3.98 ± 0.22
100 9.63 ± 0.08 6.22 ± 0.02 5.13 ± 0.12
125 10.78 ± 0.05 7.32 ± 0.07 6.53 ± 0.12
150 11.83 ± 0.14 7.70 ± 0.03 7.67 ± 0.15
  1. *Data are expressed as mean ± standard deviation (n = 3)