title: Antioxidant activities and volatile constituents of various essential oils.
abstract: Thirteen essential oils were examined for their antioxidant activity using three different assay systems. Jasmine, parsley seed, rose, and ylang-ylang oils inhibited hexanal oxidation by over 95% after 40 days at a level of 500 microg/mL in the aldehyde/carboxylic acid assay. Scavenging abilities of the oils for the 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical ranged from 39% for angelica seed oil to 90% for jasmine oil at a level of 200 microg/mL. The greatest inhibitory activity toward malonaldehyde (MA) formation from squalene upon UV-irradiation was obtained from parsley seed oil (inhibitory effect, 67%), followed by rose oil (46%), and celery seed oil (23%) at the level of 500 microg/mL. The main compounds of oils showing high antioxidant activity were limonene (composition, 74.6%) in celery seed, benzyl acetate (22.9%) in jasmine, alpha-pinene (33.7%) in juniper berry, myristicin (44%) in parsley seed, patchouli alcohol (28.8%) in patchouli, citronellol (34.2%) in rose, and germacrene (19.1%) in ylang-ylang.
authors.affiliation: Department of Environmental Toxicology, University of California, Davis, California 95616, USA.
authors.forename: Alfreda
authors.initials: A
authors.lastname: Wei
authors.forename: Takayuki
authors.initials: T
authors.lastname: Shibamoto
mesh_terms: D000447:Aldehydes / Q000032:analysis; D029061:Annonaceae / Q000737:chemistry; D000975:Antioxidants / Q000032:analysis*; D002264:Carboxylic Acids / Q000032:analysis; D016166:Free Radical Scavengers / Q000737:chemistry; D008315:Malondialdehyde / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry*; D028528:Petroselinum / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D027826:Rosa / Q000737:chemistry; D012639:Seeds / Q000737:chemistry; D014835:Volatilization
chemical_list: D000447:Aldehydes; D000975:Antioxidants; D002264:Carboxylic Acids; D016166:Free Radical Scavengers; D009822:Oils, Volatile; D010938:Plant Oils; D008315:Malondialdehyde; C054862:jasmine oil