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Mascara, Algeria

Bachir R.G.,University of Mascara | Benali M.,University Djilali Liabes
Asian Pacific Journal of Tropical Biomedicine | Year: 2012

Objective: To examine the in vitro antimicrobial activities of essential oil of the leaves of Eucalyptus globulus (E. globulus). Methods: The essential oils of this plant were obtained by the hydrodistillation method. The inhibitory effects of this essential oil were tested against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) by using agar disc diffusion and dilution broth methods. Results: The results obtained showed that essential oil of the leaves of E. globulus has antimicrobial activity against gram negative bacteria (E. coli) as well as gram positive bacteria (S. aureus). Conclusions: The encouraging results indicate the essential oil of E. globulus leaves might be exploited as natural antibiotic for the treatment of several infectious diseases caused by these two germs, and could be useful in understanding the relations between traditional cures and current medicines. © 2012 Asian Pacific Tropical Biomedical Magazine. Source

Benyoucef M.,University of Mascara | Meister C.,Natural History Museum of Geneva
Cretaceous Research | Year: 2015

Fifteen stratigraphic sections located in different parts of the Guir basin (Southwest Algeria) have been measured bed-by-bed and sampled in great detail, to study the stratigraphy, describe and interpret the facies and characterize the depositional environment of the Cenomanian-Turonian succession. Based on their stratigraphic ranges, lithofacies, regional distributions and depositional settings, the Cenomanian-Turonian succession is subdivided into three lithostratigraphic formations that are bounded by a regional scale discontinuity: the "Grès rouges" Formation attributed to the lower Cenomanian; the "Marnes à gypse inférieures" Formation assigned to the lower-middle Cenomanian and the "Calcaires de Sidi Mohamed Ben Bouziane" Formation placed in the upper Cenomanian-lower Turonian. Analyses of litho-, bio-, and microfacies resulted in the recognition of 25 facies types for this succession. These facies types have been grouped into seven facies associations (AF1 to AF7). The facies represented range from clastic, to evaporitic to carbonate, and were deposited in four major depositional environments: fluvial, siliciclastic costal, sabkha and homoclinal carbonate ramp settings. The main factors controlling depositional environments were eustatic sea-level fluctuations combined with environmental influences such as autochthonous carbonate productivity and siliciclastic supply. © 2014 Elsevier Ltd. Source

Mohammedi Z.,University of Mascara | Atik F.,Abou Bekr Belkaid University Tlemcen
International Journal of Pharma and Bio Sciences | Year: 2011

Secondary metabolites of an arabo-saharan tree Tamarix aphylla (L.) Karst. Were extracted from dry powdered leaves with different solvents: aqueous methanol; aqueous ethanol, aqueous acetone and distilled water. Total phenolic content of the four extracts were determined by Folin Ciocalteu method and their antioxidant activity was assayed through in vitro radical scavenging activity using DPPH· assay. The results showed that mixture water-methanol was better than water-ethanol, wateracetone and water for extraction bioactive compounds in particularly total polyphenols from Tamarix aphylla leaves. The average total phenol content of aqueous methanol extract was 262.26mg GAE/100g dry weight lyophilized extract. However, all extracts were free-radical inhibitors but aqueous acetone extract was more potent than aqueous ethanol extract and two others extracts. In order of effectiveness (EC50), the potent inhibitors were from water-acetone extract (0.080mg/ml) > water-ethanol extract (0.140mg/ml)>water extract (0.173mg/ml)> Water-methanol (0.911mg/ml). Source

Mohammedi Z.,University of Mascara
Research Journal of Medicinal Plant | Year: 2016

Several of experimental studies and molecular investigations highlight the power of herbs to evidence-based medicine. In Algeria, a number of medicinal plants have been studied for the treatment of diabetes such as Atriplex halimus L., xerohallophyte species, growing in arid and subarid areas, known for its hypoglycemic activity and widely used by the local population as remedy to treat diabetes mellitus. The objective of this review is to give value to this important traditional medicinal plant as antidiabetic, to set other biological and nutritional properties and its importance as resistant shrubs and good forage in severe environmental conditions. © 2016 Academic Journals Inc. Source

Ghelamallah M.,University of Mascara | Granger P.,CNRS Laboratory of Catalysis and Solid State Chemistry
Fuel | Year: 2012

The dry reforming of CH 4 by CO 2 has been studied, between 300 and 900°C, over monometallic platinum and rhodium based catalysts supported on α-Al 2O 3 doped with La 2O 3 and BaO. Those catalysts were prepared by conventional wet impregnation and characterized by various physicochemical techniques (nitrogen adsorption, X-ray diffraction, XPS analysis and H 2- temperature-programmed experiments). It was found that Pt and Rh incorporation leads to different types of interactions with La and Ba-modified α-Al 2O 3. As observed, Pt would preferentially interact with Ba inducing an inhibiting effect on the rate of the CH 4/CO 2 reaction reflected by a significant increase in the apparent activation energy. On the other hand, the preferential interaction of Rh with lanthanum oxide after Ba incorporation leads to the preservation of the catalyst activity. Such changes in catalytic properties have been discussed in the light of surface characterization and previous mechanistic information related to the occurrence of a bi-functional mechanism involving the metal/support interface. © 2012 Elsevier Ltd. All rights reserved. Source

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