Browsing by Author "Moussaoui, Y"

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    DETERMINATION OF TRACE RESIDU E S LEVEL OF PESTICIDES IN SOME VEGETABLES GROWING IN ALGERIA BY GC/µECD AND GC/MS
    (university of el oued/جامعة الوادي, 2021-01-01) Mebrouki, S; Zerrouki, H; Belfar, M.L; Douadi, A; Moussaoui, Y
    An analytical multiresidue method for the simultaneous determination of various classes of p esticides in vegetables ( tomato , pepper, hot pepper and potato ) was developed. Vegetable samples are extracted with acetonitrile. Final determination was mad e by gas chromatography with µ Electron Capture D etection (µ ECD) for organochloride pesticides . Organophosphorus, pyrithrinoids and other pesticides analysis was carried out by gas chromatography coupled with mass spectrometry in the selected ion monitori ng (SIM) mode. The identification of compounds was based on retention time and on comparison of the primary and secondary ions. Recovery studies were performed at various fortification levels of each compound and the rec overies obtained ranged from 70% to 127 % with relative standard deviations lower than 8 %. The method showed good linearity over the range studied and the detection and quantification limits for the pe sticides studied varied from 0.015 to 0.030 µg.g 1 and 0.05 to 0.1 µg.g 1 , respectively. Th e proposed method was used to determine pesticides levels in peppers , hot pepper and tomatoes grown in multichapelle greenhouses at Biskra region and potato grown at Setif region in Algeria
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    INFLUENCE OF ARID CLIMATE ON THE CONTENTOF THE PLANT "CYNODON DACTYLON (L) PERS" IN FLAVONOÏDS
    (university of eloued -جامعة الوادي, 2019-05-01) Benzahi, R; Benzahi1, K; Dadamoussa, B; Moussaoui, Y; Labed, B; Mokadem1, K
    During its evolution, plants have developed substances (called here active principles) with different functions, this can be a defense against parasitesor other aggressors (micro-organisms), a technique to prevent the growth of other nearby plants and thus ensure good nutrition, as a means of growth or renewal of the species.The concentration of active principlesof a plant varies according to the age of the plant, the season, the climate and the environment in general (drought, pollution, etc).This is why it is important to know the best time of the year, and even of the day (morning, day, evening, night) to harvest the plant.According to our study, it was found that the plant Cynodon dactylon "L" Pers has a differentcomposition and content of flavonoids between two periods.