Browsing by Author "Lakew Shewaye"

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    Antifungal Substances from Essential Oils
    (Addis Ababa Universty, 2011-07) Lakew Shewaye; Dagne Ermias (PhD)
    In vitro study of the antifungal activity of essential oils, plant extracts with MeOH : CHCl3, pure compounds and, condensed smoke extracts were conducted using agar disc diffusion method. Out of these 14 showed strong, 13 medium and 23 showed no activities to the fungal pathogen of Aspergillus niger. The essential oil of Origanum vulgare (oregano), Thymus schimperi (Tosign), Cymbopogon nardus (Citronella), Cymbopogon citratus (Lemongrass), Trachyspermum ammi (Nech azmud) and Eucalyptus citriodora showed strong inhibition zones compared to the essential oils and extracts. The GC and GC/MS analysis of essential oils revealed that O. vulgare contained thymol (56%) and carvacrol (43.5%), T. schimperi contained thymol (56.5%), linalool (18.5%), and carvacrol (8.9%) and T. ammi contained γ-terpinene (42%), thymol (26.2%), p-cymene (26.8%), and β-pinene (2.8%)