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Author: search.filters.author. CHEFROUR, AEnd date: 202

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    Biochemical, quantitative and qualitative phenolic compounds, anti-free radical's activities of Calligonum comosum collected from different sites in the Algerian Desert
    (2019-05-19) KHELEF, Y; CHOUIKH, A; REBIAI, A; NEFFAR,S; CHEFROUR, A; ADJAL, E.H; ALIA,F.
    he aim of this study is to understand the effect on biochemical, quantitative and qualitative phenolic content and to estimate the anti-free radical's activities of the Calligonum comosum collected from various locations in Oued Souf region (Southeastern Algeria). Concerning the biochemical parameters, we registered pH values ranged between 4.8 and 4.2 and we observed oscillate in the amounts of proteins and the values of Catalase activity. The analysis of extracts by HPLC identified 43 compounds were counted as the maximum number of compounds, also we recorded the appearance of some phenolic compounds: Gallic acid, Chlorogenic acid, Vanillic acid, p-Comaric acid, Vanillin and Rutin in some extracts. Anti-free radical's activities which worked in two tests: DPPH● and TAC the results indicated that all extracts were highly anti-free radicals. Our results showed that there is a significant difference between the samples of Calligonum comosum collected in different sites
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    ANTIBACTERIAL ACTIVITY OF THE Artemisia herba-alba Asso ESSENTIAL OIL (SOUK AHRAS, ALGERIA) AGAINST FOURTEEN BACTERIAL STRAINS
    (2019-09-30) BOUHOUIA, A; MAAZI, M.C; CHEFROUR, A
    Artemisia herba-alba Asso (Asteraceae) essential oil from Fedj el dib region (Souk Ahras, Algeria) was obtained by hydro-distillation of aerial parts (stems, leaves and flowers) and analyzed by gas chromatography-mass spectrometry (GC/MS) to determine its chemical composition. The main compounds obtained are: 5,6-Dicarbadecaborane (68,33%), 1,5,5-Trimethyl-6- methylene-cyclohexene (7.00%), 4,8,12-Tetradecatrien-1-ol, 5,9,13-trimethyle (5.13%), Bicyclo-[3.1.1]heptane-2-methanol (4.39%) and Cyclo-pentane carboxylic acid 3-methylene (4.19%), Artemisia essential oil also contains Phenol, 2,3,5-trimethyl-(3.15%), Phosphoric acid tribornyl ester (0.61%) and beta.-Pinene (0.29%) and the Thujone (0.16%). Further to the analytic study of essential oil, a biological study was carried out; the purpose of this biological study was to assess the antibacterial properties of Artemisia herba-alba Asso essential oil against fourteen Gram-positive and Gram-negative bacterial strains using disk diffusion method. The results obtained reveal that the Artemisia herba alba Asso essential oil exerts a strong antimicrobial activity against all tested pathogenic bacteria except P. aeruginosa and Proteus vulgaris which were resistant even to the highest concentration of essential
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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