Publications Scientifiques

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Author: search.filters.author.Yahiaoui, KarimaStart date: 2020

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    Ethnopharmacological survey of medicinal plant knowledge in boumerdes, algeria: traditional usage patterns and therapeutic applications
    (Taylor &francis, 2025) Oussaid, Sounia; Bouchenak, Ouahibaa; Yahiaoui, Karima; Hafid, Nourehoudaa; Khiari, Ouiza; Khelef, Yahiac; Laoufi, Razikad
    This ethnopharmacological survey documents the persistence of traditional plant knowledge in Boumerdes, Algeria. Through systematic interviews with 900 participants, quantitative analysis revealed distinct user profiles: predominantly women (52.1%) aged 50-70 years (39.0%), with inverse correlation to education level. Integration with conventional medicine was reported by 47% of users, motivated by perceived efficacy (41.5%) and safety (35.7%). Botanical inventory identified 263 species across 91 families, dominated by Lamiaceae (22.3%). Primary therapeutic applications targeted digestive (32.3%), respiratory (19.9%), and dermatological (11.5%) disorders. These findings validate the cultural resilience of traditional healthcare practices and underscore the imperative for phytochemical validation of documented species.
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    Students’ perceptions regarding the abrupt transition to online learning during the COVID-19 Pandemic: Case of Faculty of Chemistry and Hydrocarbons at the University of Boumerdes—Algeria
    (American Chemical Society, 2020) Blizak, Meriem Djanette; Blizak, Salah; Bouchenak, Ouahiba; Yahiaoui, Karima
    In recent months, universities around the world have been forced to cancel courses and close their doors due to the growing coronavirus epidemic. Following the government’s precautions, Algerian students were bound to quarantine regulations for their safety. Thus, they unexpectedly switched to online learning instead of face-to-face learning. Our objective of this exploratory study is to investigate the perceptions of Algerian university students regarding the abrupt transition to online learning amid the COVID-19 pandemic. To achieve this goal, an online survey with closed and open-ended questions was conducted among 380 students from the faculty of chemistry and hydrocarbons (FCH) at the University of Boumerdes—Algeria. The results showed that students have a negative perception of online learning. They are reluctant about this new digital pedagogy and prefer the traditional way of teaching to online teaching during the coronavirus pandemic
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    Effect of virgin olive and Pistacia Lentiscus oils fortified with tomato lycopene on biochemical parameters in Wistar rats
    (NAJFNR, 2021) Aidoud, Aziouz; Elahcene, Omar; Abdellaou, Zakia; Yahiaoui, Karima; Bouchenak, Ouahiba
    Background: Pistacia lentiscus oil (PLO) and virgin olive oil (VOO) contain a large variety of phytochemicals providing beneficial effects. Lycopene is the main carotenoid with antioxidant properties. The consumption of lycopene containing foods may fight against cardiovascular diseases. Aims: The present study aims to evaluate the effects of fortified oils (VOO and PLO) with lycopene on some biochemical parameters in Wistar rats. Material and Methods: The experimentation included 50 male Wistar rats from the Algerian Pasteur Institute for the duration of 9 weeks of treatment. Rats were divided into five experimental groups (n=10) and fed a different experimental diet each for 9 weeks: control group (C), Pistacia lentiscus oil group (PLO), lycopene- enriched Pistacia lentiscus oil group (PLO-Lyc), virgin olive oil group (VOO) and lycopene-enriched virgin olive oil (VOO-Lyc). Total Cholesterol (TC) concentration was determined by the enzymatic method CHOD-PAP, High-density lipoprotein-cholesterol (HDL-C) with Biotrol diagnostic, the levels of low-density lipoprotein-cholesterol (LDL-C) were calculated using the Friedewald formula (LDL-C=TC−HDL-C−TGs/5). Triglycerides (TG) were determined by the enzymatic method PAP-1000 and Serum phospholipids (PL) were determined by an enzymatic colorimetric method. The plasma atherogenic index (PAI) was calculated as (TC/HDL-C). Results: Results showed that ingestion of PLO and VOO diminished TC, LDL-C, TG, and PL levels, whereas the HDL-C levels raised in all the groups assayed. Moreover, the lowest level of plasma atherogenic index (PAI) was shown in the VOO- Lyc group after 3, 6, and 9 weeks of treatment. Conclusions: The enrichment of PLO and VOO with lycopene improved the beneficial effects derived from the consumption of both oils on serum biochemical parameters. These findings suggest that lycopene enriched PLO and VOO may be used as a natural product to defend against some cardiovascular diseases (CVD) as hyperlipidemic and hypercholesterolemic acquired disorders.
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    Évolution de la fraction lipidique et protéique au cours delamaturation de la datte Deglet-Nour
    (2021) Yahiaoui, Karima; Bouchenak, Ouahiba; Arab, Karim; Benchabane, Ahmed
    Deglet Nour dates at different stages of ripening were analyzed for their main chemical composition in lipids, fatty acids, proteins and amino acids. The following values (based on dry weight) were obtained for the five stages of ripening, respectively for lipids: from 1.25% Ms at the Hababouk stage to 6.33% Ms at the Kimri stage, 3.65% Ms at the Khâlal stage, 2.56% Ms at the Routab stage and 1.97% Ms at the Tamar stage. The fatty acids revealed are mainly myristic and palmitic acids. Protein analysis indicates values of 2.63% Ms at the Kimri stage and 1.25% Ms at the Tamar stage. Among the amino acids identified, only five were found to be present in significant amounts (glycine, -amino butyric acid, arginine, valine and lysine). From these results, it is difficult to overlook the importance of the lipid and protein fraction of the date in the formation of specific pigments and flavours
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    Evaluation de la fraction glucidique au cours de la maturation de la datte Deglet-nour
    (2020) Yahiaoui, Karima; Bouchenak, Ouahiba; Arab, Karim; Benchabane, Ahmed
    La concentration des glucides diffère au cours de la maturation de la datte Deglet Nour . Les teneurs en sucres totaux et réducteurs augmentent parallèlement avec la progression de la maturation du fruit jusqu'au stade Khâlal où les teneurs en saccharose atteignent leur maximum. La diminution de la teneur en saccharose et l'accroissement de la teneur en sucres réducteurs sont synchronisés avec l'activité de l'invertase, qui a été décelée sous la forme soluble et insoluble. L’activité optimale de l’invertase se situe à un pH de 4,5 et à une température de 30°C. Toutefois, les propriétés des fractions invertasiques soluble et insoluble de la datte Deglet-Nour sont approximativement identiques
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    Criblage phytochimique et évaluation du pouvoir antioxydant des feuilles de myrtus communis l. et rhamnus alaternus L.
    (Univérsité Saad Dahleb Blida 1, 2020) Bouchenak, Ouahiba; Yahiaoui, Karima; Benhabyles, Narimen; Laoufi, Razika; Toubal, Souheila; El Haddad, Djillali; Oussaid, Sounia; Blizak, Meriem Djanette; Arab, Karim
    Description du sujet: les travaux d'investigation actuels sont axés sur la recherche de nouvelles molécules antioxydantes d'origine naturelle et proposition d'alternatives thérapeutiques.Objectifs: l'objectif de cette étude est de mettre en relation l'utilisation traditionnelle de Myrtus communis L. et Rhamnus alaternus L. par la population de Boumerdes et leur activité antioxydante.Méthodes: la mise en évidence du pouvoir antioxydant des deux plantes, consiste à un criblage phytochimique permettant d’avoir une idée sur la présence ou l'absence de certains métabolites primaires et secondaires. L'activité antioxydante est évaluée par la méthode de réduction du fer sur les trois extraits acétonique, méthanolique et éthanolique.Résultats: le screening phytochimique révèle une richesse des deux plantes en polyphénols, glucosides, saponosides, sucres réducteur et en flavonoïdes avec une absence des tanins catéchiques, d'anthocyanes, des caroténoïdes, des irridoides, des protéines, des stérols, des polyterpènes, d'amidon et des lipides. Le meilleur rendement est obtenu avec l'acétone à 48,5% pourMyrtus communis et Rhamnus alaternusà 47%. L'activité antioxydante est maximale pour Myrtus communisà la concentration de 1mg/ml à une densité optique pour les trois extraits : éthanolique (3,84), acétonique (3,46) et méthanolique (3,22) par rapport à l'acide ascorbique. Conclusion: ces résultats apportent un appui scientifique quant à l'utilisation traditionnelle de ces plantes, ouvrant ainsi des perspectives pour leur intégration dans les industries pharmaceutiques et alimentaires.