Browsing by Author "Mohamadi, N"

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    Comparative Study on Chemical Composition of Green and Black Table Olives Brines of the Endemic ’’Sigoise’’ Cultivar: Recovery of high-Added Values Compounds
    (2023) Mohamadi, N; Meraghni, M; NECIB, N; Jelaiel, L; El Arbi, M; Bouaziz, M
    The effluents derived from the processing of table olives stand for a serious environmental problem. The study aims to valorize the brine water of table olives at different stages of ripening (green and black) of the Algerian variety Sigoise of Bejaia (East) and Mascara (West). The physico-chemical characterization revealed that these samples display have a high acid pH and salinity. The comparative study of phenolic levels exhibited showed very significant differences between the brine waters of green olives from Bejaia and Mascara, while the brines of black olives presented showed comparable levels. A high strong antioxidant potential was confirmed by DPPH (CI50=0.35 μg/100 ml–0.50 μg/100 ml) and FRAP (CI50=626.89 μg/100 ml–875.54 μg/100 ml) tests. Chemical screening by HPLC-DAD of the four samples identified high concentrations of hydroxytyrosol (HT) (390.4 mg/100 ml–360.8 mg/100 ml) and tyrosol (202.2 mg/100 ml–101.4 mg/100 ml). This study provided a deeper insight into the phenolic profile and the antioxidant potential of these brines
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    Physicochemical and Melissopalynological Study of Some Honey Samples from the Algerian East Region
    (2023-03-20) Ketfi, L; Draiaia, R; Necib, A; Mohamadi, N
    The quantitative and qualitative analysis of honey components is the object of this study. These analyses are considered a physicochemical and melissopalynological tool that allows the study of some characteristics of honey. The analysis of ten (10) samples of Algerian honey is carried out to determine the pH, water content, electrical conductivity, ash content, acidity, hydroxymethylfurfural content, proteins, and sugar content. According to the obtained results, the physico-chemical parameters of the studied honeys comply with the European and international standards. The pollen spectrum indicated the presence of 23 plant families, mainly Fabaceae, encompassing a total of 65 honey species visited by foragers. Of the 10 honeys sampled and analyzed, six were monofloral, with the remainder showing no apparent dominance of any honey type. The most frequent plant species were eucalyptus (Eucalyptus sp.), Italian sainfoin (Hedysarum coronarium), and chickweed (Lathyrus sp.). Furthermore, the results obtained indicate that all honey (monofloral and polyfloral) showed a high degree of variability in the number of pollen grains