Browsing by Author "Menaiaia, K"

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    BIOCHEMICAL AND ENZYMATIC CHARACTERIZATION OF MACROPHYTE PLANT PHRAGMITES AUSTRALIS AFFECTED BY ZINC OXIDE
    (2019-06-03) Khaldi, F; Menaiaia, K; Ouartane, N; Grara,N.
    The research aimed to understand the behavior of aquatic plants subjected to xenobiotics, a macrophyte plant Phragmites australis from the region of Souk-Ahras, is treated with three concentrations based on zinc oxide (ZnO) (3, 6 and 12 nmol·mL-1) for 7, 14 and 21 days. A measurement of certain biochemical and enzymatic parameters characteristic of oxidative stress allowed us to evaluate not only the effect of zinc oxide but also the behavior of Phragmites australis subjected to this nanometric molecule. The statistical analysis of the results obtained showed no significant differences in all the parameters measured, between leaves and roots. The results of the analysis of heavy metals in wastewater, revealed values lower than the Algerian norm with the exception of Zn. On the other hand, we noticed a high concentration of Zn and a low concentration of Fe and Pb. This result makes it possible to conclude that the wastewater is characterized by a pollution of the metallic type loaded with partially degradable effluents.
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    Phytochemical Analysis, Antioxidant, and Acetylcholinesterase Inhibitory Activity of Propolis from Northeastern Algeria
    (2022-01-01) Ouahab, A; Grara, N; Menaiaia, K; Khaldi, F; Bensouic, Ci
    Propolis is a bee resinous substance consisting mainly of phenolic compounds having nutritional and therapeutic properties and formed by the mixing of the tree and plant secretions collected by honey bees. Herein, the present study was aimed to assess the antioxidant and anticholinesterase activity of ethanolic and acetone propolis extracts from two sampling sites in Souk Ahras city (northeast Algeria). The antioxidant activity of the extracts was determined by using the common antioxidant assays (1,1- diphenyl-2-picrylhydrazyl [DPPH], acide 2-2’-azino-bis (3- ethylbenzothiazoline-6-sulphonique) [ABTS], galvinoxyl radical [GOR], and cupric reducing antioxidant capacity [CUPRAC]), and the anticholinesterase activity was determined against acetylcholinesterase (AChE). Moreover, the total phenolic (TPC), flavonoid (TFC), and condensed tannins (CTC) contents were quantified. The propolis extracts showed a potent antioxidant/inhibitory activity which almost met that of synthetic antioxidants used as standards (butylated hydroxytoluene [BHT] and butylated hydroxyanisole [BHA]). In addition, the AChE activity was highly strongly inhibited in a dose-dependent manner by the propolis extracts. The propolis extracts proved their richness in bioactive molecules able to enhance various biological activities