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Chemical and Biological Technologies in Agriculture

Table 6 Antibacterial activity against Gram-positive and Gram-negative bacterial strains of humic substances (HS) extracted from artichoke (CYN), coffee grounds (COF), and pepper (PEP) composted residues, as determined by MIC (Minimal Inhibitory Concentration)

From: Antibacterial and antioxidant properties of humic substances from composted agricultural biomasses

MIC (µg·mL−1)

  

HS-CYN

  

HS-COF

  

HS-PEP

 

Bacterial strain

 

Replicatesa

  

Replicatesa

  

Replicatesa

 

Staphylococcus aureus

1.2

1.5

1.2

10.5

10

10

1.9

1.9

2

Enterococcus faecalis

2

2

2

14

14.5

14.5

2.3

2.6

2.5

Escherichia coli

1.7

1.7

1.6

2.5

2.5

2

1.5

1.5

1

Pseudomonas aeruginosa

1.8

1.8

2

1.9

1.8

1.9

2.5

2.5

3

Klebsiella pneumoniae

2

2.3

2.5

8.5

8.5

8

2.5

2.5

2.5

  1. aReplicates were performed by three independent experiments
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