Table 1.

Antibacterial activities of curcumin and its conjugates 2, 3, 4, 6 and 8 against Gram-positive and Gram-negative bacterial strains.

Compound	MIC(μM)a
	Gram-positive	Gram-negative
	S. viridans	E. coli	K. pneumoniae	P. miraleilis
2	0.43	0.43	0.43	0.43
3	0.67	0.33	0.67	0.67
4	0.53	0.53	0.53	0.53
6	0.27	0.27	0.27	0.54
8	0.09	0.09	0.09	0.09
Curcumin	2.47	1.23	1.23	1.23
Ampicillin trihydrate	>2.47	1.23	0.60	1.23
Gentamycin sulfate	>1.73	>1.73	>1.73	>1.73

^aMIC (μM) = Minimum inhibitory concentration, i.e., the concentration in the tube with highest dilution showing no turbidity.