Browsing by Author "Bouchenak, O."

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    Characterization and assessment of the antimicrobial function of total polyphenol extracts from pulps, leaves and seeds of two ceratonia siliqua L. varieties
    (2021) Yahiaoui, K.; Bouchenak, O.; Boumaza, S.; Toubal, S.; Blizak, Meriem Djanette; Nouani, A.; Arab, K.
    The overall phytochemical test results suggested that pulp, seeds, and leaves of both grafted and spontaneous varieties are especially rich in tannins , saponins, and leuco-anthocyanins. The result of the determination of total polyphenols Ceratonia siliqua L. showed that spontaneous leaves showed that the highest value of spontaneous leaves was 14 EAGmg / g, followed by grafted seeds (11.5 EAGmg / g), and spontaneous pulps (10.2 EAGmg / g). Infra -red spectroscopy revealed the presence of many functional groups in both varieties. The antimicrobial activity is particularly found with the spantaneous leaves against Escherichia coli (21.83 ± 0.93 mm) and Staphylococcus aureus (16.36 ± 0.63 mm) Microccus sp (15.83 ± 0.73 mm) and leaves grafted against Pseudomonas aeruginosa (14.30 ± 0.35 mm)
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    Chemical composition and insecticidal activity of Origanum floribundum Munby essential oil endemic plant from Algeria
    (Malaysian Society for Parasitology, 2022) Mir, Soumia; Bouchenak, O.; Aït Kaci, K.; A.Rouane; Alliliche, M.; Arab, K.
    Among strategies for decreasing diseases, the use of larvicidal plant extracts against mosquito larvae gain an important place in vector control. The aim of the present study was to reveal the insecticidal effectiveness of an endemic medicinal plant on Mosquito-Borne Diseases. The chemical composition of the dried aerial part from Origanum floribundum Essential oil, obtained by hydrodistillation, was characterized by Fourier-transform infrared (FTIR) spectroscopy and gas chromatography-mass spectrometer (GC-MS) system. The potential larvicidal activity of this extract as bioinsecticide was assessed against Culex pipiens. Results showed many functional groups such as phenols and alcohols, besides, the chemical composition by GC-MS identified thymol (86.9%) and p-Cymene (5.1%) as major components. A significant larvicidal effect against the target mosquito species was noted, with values of LC50 at 21.19 mg/l and LC90 at 68.37 mg/l. The results obtained showed that the essential oil of Origanum floribundum with chemotype thymol possess a potent larvicidal activity and could be considered as an eco-friendly alternative for vector control
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    Inventaire et répartition spatiale des ravageurs de l’olivier au lac de Réghaïa
    (Aljest, 2017) Yahiaoui, K.; Bouchenak, O.; Fertas, M.; Arab, K.
    L'oléiculture fait face à de nombreux ravageurs (insectes, champignons et bactéries), notamment la teigne de l'olivier, la mouche de l'olivier, la cochenille noire de l'olivieret le psylle de l'olivier. Ces ravageurs peuvent provoquer des dégâts économiquement importants en l'absence de toute intervention sanitaire. Pour cela, un inventaire des ennemis et des auxiliaires de l’olivier est réalisé au lac de Réghaia, dans le but de connaitre les différents ravageurs. Les résultats émanant de cette étude ontrévélé la présence de treize espèces d’arthropodes, sept champignons, une bactérie (Pseudomonas savastanoi), et un lichen indéterminé. L’analyse des résultats a montré l’existence d’une certaine affinité ennemis-partie de l’arbre attaquée.
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    NiO thin films for environmental photocatalytic applications : a review
    (2021) Blizak, Meriem Djanette; Remli, S.; Blizak, S.; Bouchenak, O.; Yahiaoui, K.
    Nickel oxide (NiO) thin film is metal oxide that has attracted much attention in recent years due to its environment friendliness. Like all metallic oxides semiconductors, thin films, NiOis gaining more and more attention as a promising photo-catalyst to replace powder catalysts, which are difficult in recycling. This paper summarized the photocatalytic activity of metallic oxides thin films. Furthermore, the results of several studies onthe efficient photo-catalyst of NiO thin films and its components have also been shown. This review will be useful to researcher’s investigate non-toxic materials, with low production cost and high efficiency in the field of environmental protection