title: Antioxidant activity and chemical composition of essential oil from Atriplex undulata.
abstract: The essential oil from aerial parts (stems and leaves) of Atriplex undulata (Moq) D. Dietr. (Chenopodiaceae) has been studied for its in vitro antioxidant activity. The chemical composition of the oil obtained by hydrodistillation was determined by GC and GC-MS. The major constituents were p-acetanisole (28.1%), beta-damascenone (9.3%), beta-ionone (5.1%), viridiflorene (4.7%) and 3-oxo-alpha-ionol (2.2%). The antioxidant activity of the oil was determined by two methods: Crocin bleaching inhibition (Krel = 0.72 +/- 0.15) and scavenging of the DPPH radical (IC50 = 36.2 +/- 1.6 microg/mL). The presence of active compounds like p-acetanisole, carvone, vanillin, 4-vinylguaiacol, guaiacol, terpinen-4-ol and alpha-terpineol could explain the antioxidant activity observed for this oil.
authors.affiliation: Departamento de Química, Universidad Nacional del Sur, Av. Alem 1253, B8000CPB Bahia Blanca, Argentina.
authors.forename: Silvana A
authors.initials: SA
authors.lastname: Rodriguez
authors.forename: Ana P
authors.initials: AP
authors.lastname: Murray
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D027466:Atriplex / Q000737:chemistry*; D001713:Biphenyl Compounds / Q000737:chemistry; D009822:Oils, Volatile / Q000737:chemistry*; D010851:Picrates / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D009822:Oils, Volatile; D010851:Picrates; D010938:Plant Oils; C004931:1,1-diphenyl-2-picrylhydrazyl