Table 4 Values of IC50 (mg mL−1) resultant from various crude extracts of various antioxidant assays.

From: Effect of solvents on bioactive compounds and antioxidant activity of Padina tetrastromatica and Gracilaria tenuistipitata seaweeds collected from Bangladesh

Antioxidant assay

Seaweed species

IC50 (mg mL−1) values of different crude extracts

Ascorbic acid

Methanol

Ethanol

Water

DPPH assay

P. tetrastromatica

0.00297 ± 0.0005a

0.40 ± 0.12b

1.54 ± 0.03c

3.31 ± 0.04d

G. tenuistipitata

2.59 ± 0.08b

3.68 ± 0.07c

5.04 ± 0.10d

ABTS radical scavenging assay

P. tetrastromatica

0.160 ± 0.006a

1.33 ± 0.09b

2.31 ± 0.06c

4.22 ± 0.11d

G. tenuistipitata

3.01 ± 0.10b

4.69 ± 0.08c

5.91 ± 0.03d

H2O2 scavenging assay

P. tetrastromatica

0.0783 ± 0.004a

3.08 ± 0.05b

4.10 ± 0.04c

9.41 ± 0.09d

G. tenuistipitata

3.69 ± 0.11b

4.78 ± 0.05c

7.32 ± 0.07d

NO scavenging assay

P. tetrastromatica

0.0824 ± 0.008a

0.75 ± 0.03b

4.55 ± 0.05c

12.94 ± 0.06d

G. tenuistipitata

2.93 ± 0.04b

7.16 ± 0.04c

10.31 ± 0.03d

  1. Different superscript letters represent things that are substantially different from one another. Significance level is p < 0.05.