title: Chemical composition, antimicrobial and antioxidant activities of essential oil from Gnaphlium affine.
abstract: The chemical composition of the essential oil from Gnaphlium affine was determined, and its antimicrobial and antioxidant activities were evaluated. Twenty-four compounds, representing 94.95% of the amount of total oil, were identified by gas chromatography-mass spectrometry (GC-MS) analysis. Main constituents of the essential oil were found to be eugenol (18.24%), linalool (10.62%), trans-caryophyllene (8.86%), α-terpineol (5.97%), p-cymene (5.75%), hexadecanoic acid (5.63%), γ-cadinene (4.98%), δ-cadinene (4.22%), α-humulene (3.22%), and (-)-β-elemene (3.15%). The essential oil revealed a remarkable antimicrobial effect against the tested food-borne microorganisms with the MIC and MBC values in the ranges of 0.2-1.56 μg/ml and 0.39-3.13 μg/ml, respectively. The essential oil showed a potent antioxidant activity in ABTS radical scavenging, lipid peroxidation and reducing power assay. It was suggested that the essential oil from G. affine may be a new potential source as natural antimicrobial and antioxidant agents applied in food systems.
authors.affiliation: College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065, PR China.
authors.forename: Wei-Cai
authors.initials: WC
authors.lastname: Zeng
authors.forename: Rui-Xue
authors.initials: RX
authors.lastname: Zhu
authors.forename: Li-Rong
authors.initials: LR
authors.lastname: Jia
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
authors.forename: Yue
authors.initials: Y
authors.lastname: Zheng
authors.forename: Qun
authors.initials: Q
authors.lastname: Sun
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D000975:Antioxidants / Q000737:chemistry / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects / Q000648:ultrastructure; D005516:Food Microbiology; D008401:Gas Chromatography-Mass Spectrometry; D036622:Gnaphalium / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000737:chemistry / Q000494:pharmacology*; D010938:Plant Oils / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D000975:Antioxidants; D009822:Oils, Volatile; D010938:Plant Oils