title: Chemical composition and antimicrobial activities of essential oil of Blumea megacephala.
abstract: Blumea megacephalaessential oil, obtained through steam distillation of samples collected from the Shiwang Mountains in Guangxi Province, China, was analyzed using GC-FID and GC-MS. Among the 65 compounds identified in the oil, the main compounds were borneol (13.6 %), β-caryophyllene (9.56 %), germacrene D (9.09 %), sabinene (6.37 %), and α-humulene (4.78 %). Antimicrobial activity revealed that the essential oil (1000 μg/disc) has promising antimicrobial effects against several pathogens, giving satisfactory inhibition zone diameter values (21.5, 21.6, 23.4, 23.8, 21.9) and MIC values (125, 125, 62.5, 125, 125 µg/ml) against Gram-negative bacteria (Pseudomonas aeruginosa,Escherichia coli), Gram-positive bacteria (Bacillus subtilis,Staphylococcus aureus), and yeast (Hansenula anomala). Antioxidant and antimicrobial activities were correlated with chemical composition.
authors.affiliation: College of Food and Bioengineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhu
authors.affiliation: College of Food and Bioengineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, China.
authors.forename: Ying-Juan
authors.initials: YJ
authors.lastname: Tian
authors.affiliation: College of Food and Bioengineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, China.
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.affiliation: College of Food and Bioengineering, South China University of Technology, Wushan Road 381, Guangzhou 510641, China.
authors.forename: Jian-Gou
authors.initials: JG
authors.lastname: Jiang
keywords: Blumea megacephala; GC/MS; antimicrobial activity; essential oil