Abstract:
This research aimed to study in chemical constitution of ethyl acetate crude extract from
the dried Monochoria vaginalis, and tested their biological activities against bacteria, yeast and
fungi. The chemical constitution of the crude extract was analyzed by gas chromatography/ mass
spectrometry. Linoleic acid, palmitic acid, 9-cis-oleic acid, methyl linolenate, acetic acid, stearic
acid, neophytadiene and trans-oleic acid were eight major components among a total of more than
fifteen components from the crude extract of Monochoria vaginalis. Linoleic acid was analyzed as
the highest amount of 17.59%. The second component was palmitic acid as the value of 17.13%
and methyl linolenate was analyzed as the value of 5.95%. In addition, the crude ethyl acetate
extract of Monochoria vaginalis was tested its biological activity by the agar disc diffusion
method. It was inactive against gram-positive bacteria; Staphyllococcus aureus, Bacillus cereus,
gram-negative bacteria; Escherichia coli, Klebsiella pneumoniae, Salmonella thyphimurium,
Serratia marcescen, Pseudomonas aeruginosa, the fungi Aspergillus niger and the yeast Candida
albican.