Browsing by Author "Benchikha, N."

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    Extraction And Antioxidant Activities Of Two Species Origanum Plant Containing Phenolic And Flavonoid Compounds
    (University of Eloued جامعة الوادي, 2012-07-01) Benchikha, N.; Menaceur, M.; Barhi, Z.
    The antioxidant of ethanolic extract of two species of Origanum and essential oil of plant Origanum vulgare were investigated and also the total phenolic and flavonoid content measured. The radical scavenging activity was measured using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Total phenolic and flavonoid contents were estimated by Folin-Ciocalteu and aluminum chloride methods, respectively. According to the results the leaves extracts have very important values for polyphenols (266.86 mg GAE / g and 194.78 mg GAE / g) and high antioxidant activity; DPPH (IC50 = 1.37 g / l and IC50 = 1.53mg / l ) for species majorana, and vulgare respectively; also the DPPH of essential oil of Origanum vulgare was IC50 = 15.360 mg/l . This data suggest of these extracts as a natural source of phenolic compounds and antioxidant.
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    INVENTORY OF ARTHROPODS ON SESBANIA ACUELATA IN THE ALGERIAN SAHARA AND QUANTIFICATION OF PHENOLIC COMPOUNDS BY HPLC
    (University of Eloued جامعة الوادي, 2017-09-01) larkem, I.; Benchikha, N.; Domandji, S.; Domandji, M. B.
    The present study was carried out at the I.T.D.A.S. (Biskra). It contributes to the inventory and knowledge of arthropods which are successfully infecting a plant newly introduced in Algeria in this case Sesbania acuelata. During the summer of 2016, each month, arthropods are collected using three methods: pitful traps, yellow water traps and direct hunting. The survey resulted in the retrieval of 685 individuals in 125 arthropods, grouped into 66 families and 13 orders. The results thus obtained showed a predominance of the order Hymenoptera followed by Diptera and Orthoptera. The Order of the acari is the least represented. For a better qualitative and quantitative analysis of the species identified, numerous ecological indices were used. Â Â Â The extract obtained was analyzed, under optimum conditions, by HPLC which allowed the identification of seven phenolic compounds which are ascorbic acid, gallic acid, chlorogenic acid, caffeic acid, and Vanillin, quercitin, rutin acids. Â Â Â Sesbania acuelata, can be, however, considered as a plant of pharmaceutical utility of great importance in addition to the other virtues.