Browsing by Author "Draiaia, R"

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    Evaluation of Polyphenols, Vitamin C Contents and Antioxidant Activity of Two Types of Algerian Honey
    (2022-09-28) Necib, A; Ketfi, L; Draiaia, R; Rezig, S.
    This study aimed to estimate two different types of Algerian honey: antioxidant contents (total phenols and vitamin C), and levels of antioxidant (DPPH assay) and reducing activity (FRAP assay). Honey samples were characterized by high content of total phenols (314.231 ± 281.346 – 394.231 ± 155.835 mg AG 100 g-1) and low vitamin C values (0.25 ± 0.05 – 0.35 ± 0.05 mg 100 g-1). As a result, the antioxidant activity and reducing capacity values were found to be 9.578 ± 3.157 and 11.255 ± 2.668% for DPPH and 15.240 ± 4.578 to 17.794 ± 8.179 μg 100 g-1 for the FRAP assay. Our data showed that dark honey contains bioactive compounds with significant antioxidant activity
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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
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    Pyrrolizidine Alkaloids in Some Algerian’s Honeys
    (2019-03-28) Draiaia, R; Borin, A; Martinello, M; Gallina, A; Mutinelli, F; Chefrour, A
    In this research, some Algerian honey samples were collected from various geographical and botanical origins, and analyzed by LC/MS method for determination of pyrrolyzidine alkaloids. The study of 46 samples revealed the presence of PA in the honeys tested and that some contained high concentrations of this substance. 74% contained PAs with a total PAs’ concentration ranging from 1 to 748 μg/kg of PApositive samples. This study demonstrated that Algerian honeys may contain high amounts of PAs exceeding the current recommendations. Massive intoxication during honey consumption seemed unlikely. However, long-term consumption of large quantities of highly contaminated honey could lead to poisoning specially in possible additional exposure of consumer to PAs from other sources like medicinal plants, which is recognized as a potential threat to human health. For that reason, beekeepers have been advised to carry out more rigorous quality control tests to the evaluation of PAs in honeys