title: Variations in Tunisian borage essential oil profiles and their antioxidant activities during flowering.
abstract: This study was conducted to examine the chemical composition and antioxidant activity of the essential oils (EOs) of Borago officinalis stem during its flowering stage. The EO composition was characterised by high proportions of E,E-decadienal, the main compound of monoterpene hydrocarbon class, with values varying from 47.08% to 55.28% in two Tunisian regions. The region of Korba exhibited the highest scavenging activity (2.05 mg/mL) by comparison with Beja region. In all tests, the fructification stage showed the best antioxidant activity of all flowering stages.
authors.affiliation: a Laboratory of Bioactive Substances, Biotechnology Center in Borj-Cedria Technopol , BP 901, 2050 Hammam-Lif , Tunisia.
authors.forename: Nidhal
authors.initials: N
authors.lastname: Salem
authors.forename: Kamel
authors.initials: K
authors.lastname: Msaada
authors.forename: Majdi
authors.initials: M
authors.lastname: Hammami
authors.forename: Ahmad
authors.initials: A
authors.lastname: Jday
authors.forename: Sahar
authors.initials: S
authors.lastname: Salem
authors.forename: Ferid
authors.initials: F
authors.lastname: Limam
authors.forename: Brahim
authors.initials: B
authors.lastname: Marzouk
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D029683:Borago / Q000737:chemistry*; D035264:Flowers / Q000254:growth & development*; D008401:Gas Chromatography-Mass Spectrometry; D039821:Monoterpenes / Q000032:analysis; D009822:Oils, Volatile / Q000737:chemistry; D010938:Plant Oils / Q000032:analysis*; D014416:Tunisia; D017965:gamma-Linolenic Acid / Q000032:analysis*
chemical_list: D000975:Antioxidants; D039821:Monoterpenes; D009822:Oils, Volatile; D010938:Plant Oils; D017965:gamma-Linolenic Acid; C079363:borage oil
keywords: Borago officinalis; E,E-decadienal; fructification stage; growing region; radical scavenging activity