title: Chemical composition and antibacterial activity of the essential oil of Ruilopezia bracteosa.
abstract: The essential oil from the leaves ofRuilopezia bracteosa was obtained by hydrodistillation, and analyzed by GC-MS. Eighteen components, which made up 99.6% of the oil were identified, the most abundant being β-myrcene (34.2%), α-pinene (24.3%), 7-epi-α-selinene (9.1%), β-pinene (8.5%) and 6,9-guaiadiene (4.4%). Antibacterial activity was tested against Gram-positive and Gram-negative bacteria using broth microdilution and disk agar diffusion methods. MIC values found presented significant differences between both methods, which may be due to diffusion factors.
authors.forename: Libia
authors.initials: L
authors.lastname: Alarcón
authors.forename: Alexis
authors.initials: A
authors.lastname: Peña
authors.forename: Judith
authors.initials: J
authors.lastname: Velascd
authors.forename: José Gregorio
authors.initials: JG
authors.lastname: Baptista
authors.forename: Luis
authors.initials: L
authors.lastname: Rojas
authors.forename: Rosa
authors.initials: R
authors.lastname: Aparicio
authors.forename: Alfredo
authors.initials: A
authors.lastname: Usubillaga
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D019659:Asteraceae / Q000737:chemistry*; D001419:Bacteria / Q000187:drug effects; D009822:Oils, Volatile / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D009822:Oils, Volatile; D010938:Plant Oils