Research Article

Green Route for Efficient Synthesis of Novel Amino Acid Schiff Bases as Potent Antibacterial and Antifungal Agents and Evaluation of Cytotoxic Effects

Table 4

Minimum inhibitory concentration for bacteria.

CompoundMIC (ug/mL)
Pseudomonas aeruginosa Bacillus licheniformis Staphylococcus aureus Micrococcus luteus Escherichia coli
25050010002505001000250500100025050010002505001000

4a+++++++− − * +− − * +− − *
4b+++++++++++++++
4c+− − * +− − * +++++++− − *
4d++++++++++− − * − − * +− − * − − *
4e+++++++− − * +− − * − − * +− − *
4f+++++++++++++++
4g+− − * +− − * +− − * +− − * − − * − − * − − *
4h++++− − * +++− − * − − * +− − * − − *
4i++++− − * +++− − * − − * − − * − − *
4j+− − * ++− − * ++− − * − − * − − * +− − * − − *
4k+++++++++++++− − *
4l++− − * +++++++− − * − − * +++
4m+− − * ++− − * +− −++++− − *
4n++++− − * ++++− − * − − * +++
4o++++++− − * +− − * − − * ++− − *
4p+− − * ++− − * +− − * ++++++
Solvent
DMSO
+++++++++++++++
Streptomycin− − − −+++− − − −
Gentamycin− − −− − −− − − −− − − −− − − −

+: inactive (zone of inhibition < 6 mm); −: slightly active (zone of inhibition 6–8 mm); − −: moderately active (zone of inhibition 8–10 mm); − − − −: highly active (zone of inhibition > 10 mm); filled part showing MIC for particular organism.