عمر مكان, ميمون زوهدي

كلية الطب والصيدلة-جامعة محمد الخامس بالرباط · المغرب

Federica Pellati, Lila Boulekbache , Menana Guemghar

كلية العلوم الطبيعية والحياتية-جامعة عبد الرحمان ميرة - بجاية · الجزائر

إيمان ملالة, السعيد دراجي

كلية الشريعة والاقتصاد-جامعة الأمير عبد القادر للعلوم الإسلامية · الجزائر

Hassan Ali Abu-Jarad, نائلة محمد حسين ابو شعيره

كلية التربية -جامعة الازهر - غزة-جامعة الازهر - غزة · فلسطين

جميلة حشماوي, محفوظ الكالدي, نادية قداري

كلية الآداب واللغات-جامعة الجيلالي بونعامة - خميس مليانة · الجزائر

I. A Basunbul, حمود احمد فرحان دحوة

كلية الهندسة-جامعة الملك فهد للبترول والمعادن · السعودية

This study was carried out to evaluate the performance of a few repair materials in resisting rebar corrosion. The experimental work was carried out in three stages. In the first stage, the repair materials were evaluated by conducting water permeability, chloride permeability and accelerated corrosion tests. In the second stage, these repair materials werte used to repair reinforced concrete beams and they were exposed to sodium chloride solution. The resistance to corrosion was evaluated by measuring half-cell potentials and corrosion rates of rebars using Tafel Plot technique. In the third stage, the effect of heat-cool cycling on the corrosion resistance performance of the repair materials and repaired beams was undertaken.

حسان علي مصطفى , زكريا كمبريس

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

Wolbachia is a known endosymbiont of many insects including the fruit fly Drosophila melanogaster and the disease vectors Culex pipiens and Aedes albopictus. It is present in the gonads and induces cytoplasmic incompatibility; a partial one in Drosophila and a complete one in mosquitoes. Therefore, understanding how this microbe manipulates its host to induce this reproductive alteration would be of great importance. It would indeed fill in a gap in knowledge present in the field pertaining to the nature of this interaction: is Wolbachia perceived as a parasite by the host? Does its presence impose some sort selective advantage or disadvantage on its host's fitness? Moreover, deciphering the sequence of events leading to cytoplasmic incompatibility would indeed open new possibilities for biological control of some disease vectors, of which an example of would be the introduction of infected males to an environment of Wolbachia free females, leading to cytoplasmic incompatibility and thus population control. In this study we aim to understand some of the mechanisms employed by Wolbachia to manipulate its natural host Drosophila melanogaster, and how in turn does this fly counteract and respond to the bacterium studying the immune responses activated by Drosophila specifically. In this study, we use the genetic tools available for Drosophila in order to tackle the interactions taking place at the molecular levels between the endosymbiont and its host. We try to address how the bacterium is manipulating its host at the molecular and gene levels, and in turn check how the host is responding to control Wolbachia.

شكرين ديلمي, عبدالرؤوف عبادية, محمد رفيق حاج جيلاني

كلية الحقوق والعلوم السياسية-جامعة الجيلالي بونعامة - خميس مليانة · الجزائر

Adel Zemirline, Mohammed Ouali

جامعة سعد دحلب البليدة · الجزائر

L’utilisation des matériaux piézoélectriques dans le domaine de l’ingénierie a pris une ampleur considérable ces dernières années. La recherche bibliographique révèle la richesse des études faites dans ce domaine, leur actualité et leur importance. Comme contribution à la modélisation et à l’étude du comportement statique et dynamique, on se propose de considérer des structures piézoélectriques modélisées mathématiquement en admettant quelques aspects mécaniques, tels que l’effet du cisaillement, l’amortissement structural et le changement de la température ambiante. Ensuite, on discrétise les modèles établis en utilisant les éléments finis. Afin de se faire une idée plus détaillée sur ces structures, on étudie leur comportement en présence, entre autres, d’un défaut fréquemment rencontré, qui est le décollement entre les différentes couches formant les stratifiés. Les modèles présentés ont été confrontés à ceux de la littérature.

Hocine Benalla , Rebbah Redjem

كلية العلوم الهندسية-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر