title: Effect of gamma and e-beam radiation on the essential oils of Thymus vulgaris thymoliferum, Eucalyptus radiata, and Lavandula angustifolia.
abstract: The microbiological contamination of raw plant materials is common and may be adequately reduced by radiation processing. This study evaluated the effects of gamma- and e-beam ionizing radiations (25 kGy) on three plants used as food or as medicinal products (Thymus vulgaris L., Eucalyptus radiata D.C., and Lavandula angustifolia Mill.) as well as their effects on extracted or commercial essential oils and pure standard samples. Comparison between irradiated and nonirradiated samples was performed by GC/FID and GC/MS. At the studied doses, gamma and e-beam ionizing radiation did not induce any detectable qualitative or quantitative significant changes in the contents and yields of essential oils immediately after ionizing radiation of plants or commercial essential oils and standards. As the maximum dose tested (25 kGy) is a sterilizing dose (much higher than doses used for decontamination of vegetable drugs), it is likely that even decontamination with lower doses will not modify yields or composition of essential oils of these three plants.
authors.affiliation: Laboratoire de Pharmacognosie, Unité d'Analyse Chimique et Physico-Chimique des Médicaments, Université Catholique de Louvain, UCL 72.30-CHAM, Avenue Emmanuel Mounier 72, 1200 Bruxelles, Belgium. mohamed.haddad@cham.ucl.ac.be
authors.forename: Mohamed
authors.initials: M
authors.lastname: Haddad
authors.forename: Marie-France
authors.initials: MF
authors.lastname: Herent
authors.forename: Bernard
authors.initials: B
authors.lastname: Tilquin
authors.forename: Joëlle
authors.initials: J
authors.lastname: Quetin-Leclercq
mesh_terms: D002849:Chromatography, Gas; D005052:Eucalyptus / Q000528:radiation effects*; D005720:Gamma Rays; D008401:Gas Chromatography-Mass Spectrometry; D027523:Lavandula / Q000528:radiation effects*; D009822:Oils, Volatile / Q000528:radiation effects*; D046930:Thymus Plant / Q000528:radiation effects*
chemical_list: D009822:Oils, Volatile