The methanolic extract ofCommelina communis (aerial part) showed antibacterial activity aganist a cariogenic bacterium,Streptococcus mutans OMZ 176. The active principles were identified to be β-carboline alkaloids, 1-carbomethoxy-β-carboline, norharman and harman, which were bactericidal in the minimal inhibitory concentration (MIC) of 100 μg/ml against the strain.
The methanolic extract ofCommelina communis (aerial part) showed antibacterial activity aganist a cariogenic bacterium,Streptococcus mutans OMZ 176. The active principles were identified to be β-carboline alkaloids, 1-carbomethoxy-β-carboline, norharman and harman, which were bactericidal in the minimal inhibitory concentration (MIC) of 100 μg/ml against the strain.
It was revealed that magnolol and honokiol isolated from the stem bark ofMagnolia obovata, had potent antibacterial activity againstBacillus anthracis. A quantitative analytical method of magnolol and honokiol by HPLC has been established, and the amounts of the two components in the dried stem bark ofM. obovata were 1.94% and 0.44%, respectively.
