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Table 2 Zone of inhibition observed for Gram-negative bacteria Escherichia coli by different concentrations of extracts

From: Comparative phytochemical, antioxidant, and antibacterial study of different parts of Doigota plants (Bixa orellana L.)

Samples

Zone of inhibition (mm)

10 mg/mL

7.5 mg/mL

5 mg/mL

2.5 mg/mL

Aqueous extract (seed)

9.1 ± 0.3

8.5 ± 0.3

8.1 ± 0.3

7.6 ± 0.3

Ethanolic extract (seed)

8.5 ± 0.3

8.3 ± 0.2

8.1 ± 0.2

7.8 ± 0.2

Methanolic extract (seed)

6.9 ± 0.2

6.7 ± 0.2

5.9 ± 0.2

5.4 ± 0.2

Aqueous extract (branch)

10.2 ± 0.3

8.9 ± 0.2

8.5 ± 0.3

7.2 ± 0.2

Ethanolic extract (branch)

9.2 ± 0.2

8.8 ± 0.2

7.6 ± 0.2

7.1 ± 0.3

Methanolic extract (branch)

6.1 ± 0.2

5.7 ± 0.2

0

0

Aqueous extract (leaf)

13.1 ± 0.3

9.0 ± 0.3

8.2 ± 0.3

7.4 ± 0.3

Ethanolic extract (leaf)

12.6 ± 0.3

9.2 ± 0.2

8.0 ± 0.2

7.1 ± 0.4

Methanolic extract (leaf)

12.9 ± 0.2

8.4 ± 0.3

7.8 ± 0.2

7.2 ± 0.2