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Browsing by Author "Hennia, Aicha"

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  • Composition, chemical variability and effect of distillation time on leaf and fruits essential oils of Myrtus communis from north western Algeria
    Publication . Hennia, Aicha; Miguel, Maria Graça; Brada, Moussa; Nemmiche, S.; Figueiredo, A. Cristina
    The chemical variability of the essential oils isolated from Myrtus communis L. leaves and fruits collected from the North western Algeria was evaluated along with a hydrodistillation timecourse study of the essential oil main components. M. communis essential oils were isolated by hydrodistillation and analyzed by Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS). The essential oils yields ranged between 0.28% and 0.77% (w/d.w.). Although in variable ranges the leaf (L) and the fruits (F) essential oils were characterized by the dominance of the same compounds: α-pinene (23–49% and 21–43% for L and F, respectively), 1,8-cineole (10–24% and 5-31% for L and F, respectively); limonene (11–30% and 9–35% for L and F, respectively); and linalool (2–32% and 1–7% for L and F, respectively). For the first time, Algerian linalool-rich myrtle essential oils (>30%) are described. Higher relative amounts of α-pinene, 1,8-cineole, limonene and linalool can be obtained with shorter distillation times.
    2016-03Journal article Restricted Show more
  • Myrtus communis essential oils: insecticidal, antioxidant and antimicrobial activities: a review
    Publication . Hennia, Aicha; Nemmiche, Said; Dandlen, Susana; Miguel, Maria Graca
    Myrtle (Myrtus communis L.) is a wild aromatic plant that laboratorial works have demonstrated the insecticidal, antioxidant, anti-inflammatory and antimicrobial activities of myrtle essential oils (EOs). The chemical composition may change according to several factors; nevertheless, it was constant in practically all EOs the presence of 1,8-cineole and α-pinene, as main components (>5%). The biological activities, generally low or moderate depended on the organism (insecticidal) and microorganism and on the chemical composition. Generally, the contribution of the components on the biological activities was not determined; nevertheless, they were generally attributed to the presence of the main components (1,8-cineole, α-pinene, eugenol, methyleugenol, myrtenyl acetate, among other components depending on the property). The antioxidant activity of myrtle oil was predominantly determined in cell-free methods, though very few works also used cell model methods. In all cases, the activities were also low to moderate due to the absence of phenol compounds.
    2019Journal article Restricted Show more