Isolation, identification, and purification of cinnamaldehyde from Cinnamomum zeylanicum bark oil. An antibacterial study

Figures & data

Figure 1.  trans-Cinnamaldehyde from Cinnamomum zeylanicum bark oil.

Figure 2.  FTIR spectrum of cinnamaldehyde isolated from Cinnamomum zeylanicum bark oil.

Figure 3.  HPLC chromatogram of cinnamaldehyde isolated from Cinnamomum zeylanicum bark oil.

Table 1.  Antibacterial activity of cinnamaldehyde isolated from Cinnamomum zeylanicum bark oil.

Microorganism	Zone of inhibition (mm)
	Cinnamaldehyde dilutions				Control Streptomycin(25 μg/mL)
	1:1	1:5	1:10	1:20
Staphylococcus aureus	24.1	21.6	19.4	17.2	20.7
Bacillus cereus	25.3	22.9	20.5	18.3	22.3
Escherichia coli	23.2	21.2	18.3	15.7	20.4
P. mirabilis	22.3	19.3	17.3	15.2	16.4
Klebsiella pneumoniae	23.6	22.3	19.4	17.5	17.2
Pseudomonas aeruginosa	21.2	18.5	16.2	14.4	15.3

Table 2.  Minimum inhibitory concentration (MIC) of cinnamaldehyde isolated from Cinnamomum zeylanicum bark oil.

Microorganisms	MIC (μg/mL)
	Cinnamaldehyde	Control (streptomycin)
Staphylococcus aureus	62.5	7.8
Bacillus cereus	31.2	7.8
Escherichia coli	62.5	7.8
P. mirabilis	125.0	15.6
Klebsiella pneumoniae	62.5	15.6
Pseudomonas aeruginosa	125.0	15.6