Browsing by Author "TELAILIA, S"

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    CHEMICAL COMPOSITION AND ANTIBACTERIAL ACTIVITY OF ESSENTIAL OILS FROM Mentha pulegium L. AND Mentha suaveolens Ehrh. GROWING IN NORTH-EAST OF ALGERIA
    (2020-09-09) BOUTABIA, L; TELAILIA, S; GUENADIL, F; CHEFROUR, A.
    Mentha pulegium L. and M. suaveolens Ehrh. are spontaneous plants growing in the wetlands of the Souarekh region (north-eastern Algeria). They are very well known and used by the natives of this region for different virtues. Moreover, these subspecies have been chosen for their great morphological variations. Hence, in this study, we aim at determining the chemical composition of the essential oils of both plants and evaluating their antibacterial activities. The aerial parts of the plants were hydrodistilled using a Clevenger type apparatus and the essential oils were analyzed and identified using gas chromatography-mass spectrometry. Antibacterial screening of essential oils was carried out on the basis of the diameter of the inhibition zone using the disc diffusion method against two bacterial strains. The chemical analysis of the essential oils of both mints resulted in main compounds pulegone (61.24%), isomenthone (11.32%) and menthone (5.6%) for M. pulegium, and piperityone oxide (47.52%) for M. suaveolens. Accordingly, the study of the biological activity of essential oils manifested the antibacterial effect against the strains studied. The obtained results are therefore promising and thus pave the way for manufacturers to use the essential oils of the two plants in the pharmaceutical and food industries.
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    LA RICHESSE ET LA DISTRIBUTION DES AMPHIBIENS DANS LA RÉGION DE SOUK AHRAS (NORD-EST DE L’ALGÉRIE)
    (2019-12-21) TLIDJANE, A; MENAA, M; REBBAH, A. C; TELAILIA, S; SEDDIK, S; CHEFROUR, A; MAAZI, M.C.
    Recently, global efforts towards biodiversity conservation have paid particular attention to Amphibia. Many amphibian species are threatened with extinction due to the loss or degradation of their habitats. Knowledge of the geographical distribution of amphibians in Algeria was until very recently relatively incomplete, but the book “Amphibians of North Africa” (ESCORIZA & BEN HASSINE, 2019) provides comprehensive distribution maps for all species, including those in Algeria. In order to improve knowledge of distributions, we conducted the first amphibian survey of the area of Souk Ahras region (north-eastern Algeria) by sampling at 102 sites between 2014 and 2017. Seven species were found, six of which are frogs (Hyla meridionalis, Bufo spinosus, Sclerophrys mauritanica, Bufotes boulengeri, Pelophylax saharicus and Discoglossus pictus) and one salamander (Pleurodeles nebulosus) which is a vulnerable Algero-Tunisian endemic. The species richness was higher (seven species) in the humid and sub-humid sites in the north of the Souk Ahras region than at the other sites; richness decreased progressively towards the semi-arid sites. Certain species showed a wide distribution, whereas others were very localized and rare, such as P. nebulosus, B. boulengeri and H. meridionalis