Browsing by Author "Zahnit W."

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    Effect of Juniperus communis extract on probiotic properties of Bacillus safensis isolated from camel milk in the region of El Oued (Algeria)
    (2024-01-01) Layadi I.; Laiche A.T.; Tlili M.L.; Messaoudi M.; Ghemam Amara D.; Mezghani-Khemakhem M.; Naccache C.; Sawicka B.; Atanassova M.; Zahnit W.; Ahmad S.F.
    The current study focuses on the effect of Juniperus communis extract on the probiotic properties of lactic acid bacteria isolated from camel milk in the region of El Oued (Algeria). Chromatographic analysis by HPLC was carried out to detect the most important compounds extracted from the plant. The total phenolic and flavonoid contents were determined using the colorimetric procedures Folin–Ciocalteu and aluminum chloride. The probiotic properties were studied and evaluated in vivo with Juniperus communis extracts after isolating strains from camel's milk and identifying them using 16S rRNA gene sequencing. Chromatographic profiles of the phenolic compounds revealed that Juniperus communis extract is rich in quercetin. After conducting chemical analyses of polyphenols and flavonoids, the results demonstrated a high content of phenolic compounds in Juniperus communis extracts (polyphenols: 103.80 ± 0.30 mg GAE/g E. flavonoids: 15.85 ± 0.80 mg QE/g E). Sequencing and phylogenetic analysis showed that the isolates belong to Bacillus pumilus and Bacillus safensis strains. The combination of Juniperus communis and Bacillus safensis restored the healthy intestine wall structure and returned the blood biochemical parameters to normal values. It was found that the mixture enhanced anti-inflammatory effectiveness by reducing erythrocyte sedimentation rate and C-reactive protein values. Juniperus communis has a high polyphenol and flavonoid content which can have a considerable impact on Bacillus safensis probiotic properties.
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    Exploring Bioactive Components and Assessing Antioxidant and Antibacterial Activities in Five Seaweed Extracts from the Northeastern Coast of Algeria
    (2024-06-01) Bouzenad N.; Ammouchi N.; Chaib N.; Messaoudi M.; Bousabaa W.; Bensouici C.; Sawicka B.; Atanassova M.; Ahmad S.F.; Zahnit W.
    The main goal of this study was to assess the bioactive and polysaccharide compositions, along with the antioxidant and antibacterial potentials, of five seaweeds collected from the northeastern coast of Algeria. Through Fourier transform infrared spectroscopy analysis and X-ray fluorescence spectroscopy, the study investigated the elemental composition of these seaweeds and their chemical structure. In addition, this study compared and identified the biochemical makeup of the collected seaweed by using cutting-edge methods like tandem mass spectrometry and ultra-high-performance liquid chromatography, and it searched for new sources of nutritionally valuable compounds. According to the study’s findings, Sargassum muticum contains the highest levels of extractable bioactive compounds, showing a phenolic compound content of 235.67 ± 1.13 µg GAE·mg−1 and a total sugar content of 46.43 ± 0.12% DW. Both S. muticum and Dictyota dichotoma have high concentrations of good polyphenols, such as vanillin and chrysin. Another characteristic that sets brown algae apart is their composition. It showed that Cladophora laetevirens has an extracted bioactive compound content of 12.07% and a high capacity to scavenge ABTS+ radicals with a value of 78.65 ± 0.96 µg·mL−1, indicating high antioxidant activity. In terms of antibacterial activity, S. muticum seaweed showed excellent growth inhibition. In conclusion, all five species of seaweed under investigation exhibited unique strengths, highlighting the variety of advantageous characteristics of these seaweeds, especially S. muticum.
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    Mineral Profile, Antioxidant, Anti-Inflammatory, Antibacterial, Anti-Urease and Anti-α-Amylase Activities of the Unripe Fruit Extracts of Pistacia atlantica
    (2023-01-01) Benmohamed M.; Guenane H.; Messaoudi M.; Zahnit W.; Egbuna C.; Sharifi-Rad M.; Chouh A.; Seghir B.B.; Rebiai A.; Boubekeur S.; Azli T.; Harrat M.; Sawicka B.; Atanassova M.; Yousfi M.
    Pistacia Atlantica in folk medicine is used by Algerian traditional healers for treating a wide variety of diseases and conditions including dyspepsia, digestive problems, peptic ulcers, and, in particular, inflammatory diseases. The present study aimed to assess the phytochemical composition, in vitro antioxidant activity (using 2,2-diphenyl-1-picrylhydrazyl (DPPH), ABTS+, and reducing power methods), enzyme inhibitory activity (towards α-amylase and urease), antibacterial activity, and in vivo anti-inflammatory activity of the unripe fruit extracts of Pistacia atlantica collected from different parts of the Djelfa region of Algeria. According to the findings, various aqueous extracts exhibited significant antioxidant and enzymatic activities in all tests, but showed that they have a weak inhibitory effect against all tested bacterial strains. Twenty-one minerals comprising both macro- and microelements (Ba, Br, Ca, Cl, Co, Cr, Cs, Eu, Fe, K, Mg, Mn, Mo, Na, Rb, Sb, Sc, Sr, Th, U, and Zn) were determined using the technique of neutron activation analysis (INAA). The result indicates that the concentration of the mineral element is close to the minimal FAO recommendation. In addition, the result revealed significant anti-inflammatory activities. The data generated can be a valuable source of information for the pharmaceutical industry and medical research. These results suggest that the unripe fruit extracts of Pistacia atlantica have an appropriate potential to be utilized across a wide range of contexts as an agent with multifunctional uses, as well as a natural remedy for other physiological diseases.
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    Nutritional potential, phytochemical analysis, and biological activities of quinoa (Chenopodium quinoa Willd.) seeds from arid zone culture
    (2024-01-01) Touil L.; Rami R.; Aydi S.S.; Amara D.G.; Messaoudi M.; Sawicka B.; Atanassova M.; Zahnit W.; Aydi S.; Ahmad S.F.; Mars M.
    Quinoa, scientifically known as Chenopodium quinoa Willd., is well recognized for its exceptional nutritional composition and potential benefits for human health. This research aims to conduct a phytochemical analysis of nutraceutical properties and biologcal activities of seven different quinoa cultivars, namely, red, white, Amarilla marangani, kancolla, Giza 02, Amarilla sacaca, and black. The analysis of ground seeds revealed that Giza 02, white, and A. marangani had the most significant protein, fat, ash, and carbohydrates, respectively. Furthermore, the MeOH extracts of the various quinoa genotypes exhibited high levels of total phenolic, flavonoid, condensed tannin and reducing sugar contents in the seed extracts obtained using consecutive solvents. In addition, HPLCDAD analysis revealed the presence of seven phenolic compounds, which may be classified into four families: phenolic acid, flavonoids, coumarins, and stilbenes. The IC50 values for the antioxidant activity ranged from 6.4 to 7.7 μg/mL. Furthermore, the variability in the antibacterial activity across different genotypes and gram-positive and gram-negative bacterial species was observed, and the efficacy of the CYHA-red extract against Micrococcus luteus was the highest. The findings of this study indicate that the incorporation of quinoa into the arid and Saharan cultivation system has the potential to enhance the nutritional and nutraceutical characteristics of the seeds.
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    Phenotypic characterization and molecular identification of Bacillus pumilus isolated from Algerian goat’s milk and evaluation of its synbiotic effect with Hammada scoparia L. extract and ZnO-NPs
    (2024-01-01) Chaima B.; Boutlelis D.A.; Touhami L.A.; Ghemam Amara D.; Khemakhem M.M.; Naccache C.; Atanassova M.; Zahnit W.; Ahmad S.F.; Messaoudi M.
    This study was conducted to identify and characterize the Bacillus strain from Goat’s milk in Algeria and to evaluate the prebiotic effect of H. scoparia aqueous extract and ZnO-NPs on the isolated Bacillus strain. Potentially probiotic bacteria were isolated and identified based on phenotypic characteristics, including the morphological, physiological (growth temperature, salt tolerance), biochemical (API 10S strip kits), and confirmed by 16S rDNA gene sequencing. Bacillus pumilus specie of lactic acid bacteria were identified. The base pair length of amplified DNA for the isolate was 1500 Bp. The isolates could not grow at 10°C and 45°C and tolerate up to 6% salt. H. scoparia extract and ZnO-NPs have a beneficial effect on the Bacillus pumilus strain for acid tolerance, bile tolerance, and cell surface hydrophobicity respectively; H. scoparia extract and ZnO-NPs results are high comparing to the control group’s results. As the concentration of the tested samples increases, the percentage of probiotic characteristics of Bacillus pumilus increases, in contrast to the control sample. Therefore, they could be useful tools to define adequate combinations in colonic foods development and health benefits. The beneficial physiological and biochemical properties of isolated Bacillus pumilus space from Goat’s milk with the H. scoparia aqueous extract and ZnO-NPs revealed their potential applications in the food industry.