Table 2.

In vitro antibacterial activities of Schiff bases and complexes *.

Compound	Gram-Positive Strains		Gram-Negative Strains
	S. aureus ATCC® 25923	L. monocytogenes ATCC® 19115	E. coli ATCC® 25922	P. aeruginosa ATCC® 27583
L1	500	500	2000	2000
La-L1	125	500	500	1000
Ce-L1	250	500	500	1000
L2	500	500	2000	2000
La-L2	250	500	1000	1000
Ce-L2	250	500	1000	1000
L3	250	1000	500	2000
La-L3	500	1000	500	2000
Ce-L3	500	1000	1000	2000
L4	250	1000	1000	2000
La-L4	250	1000	2000	2000
Ce-L4	250	1000	2000	2000
CP a	0.50	0.50	<0.008	>4.00
ÂgNO3 b	<100	<100	<100	<100

* Results expressed in μg/mL; controls: ^a Ciprofloxacin (CP) and ^b Silver nitrate (AgNO₃).