داني نعوس, مابيل موريس الحداد

كلية الحقوق والعلوم السياسية والإدارية-الجامعة اللبنانية · لبنان

فاطمة بوداليا, Boumaza. A , سمية لبادلة

كلية علوم الطبيعة والحياة وعلوم الأرض والكون-جامعة 8 ماي 1945 قالمة · الجزائر

L'effet toxique et génotoxique du pesticide Zoom ont été étudiés en utilisant le test d’Allium cepa. La valeur d’EC50 a été déterminée premièrement en évaluant l'inhibition de l’élongation racinaire. Différentes doses de concentrations variées du Zoom ont été introduits aux racines de l’oignon pour évaluer l'index mitotique des cellules méristematiques d’Allium cepa et les aberrations chromosomiques. L'eau du robinet a été utilisée comme témoin. L’index mitotique et la fréquence des aberrations chromosomiques ont été calculés séparément pour chaque dose introduite. Les anomalies les plus observés étaient des fragments, cmitose, des ponts et la perte de chromosomes. D'après les résultats obtenus, l'effet génotoxique du pesticide Zoom sur l'organisme d'essai a été observé.

صالح فالح, عبدالفتاح بن عمر, علي خضرة

معهد العلوم الإسلامية-جامعة الشهيد حمة لخضر - الوادي · الجزائر

فهذه الرسالة بعنوان: الشيخ عمار بن الأزعر, وجهوده الدعوية, وقد اشتملت هذه الرسالة على: مقدمة, تمهيد, فصلين, خاتمة, توصيات. ففي التمهيد: تكلمت فيه عن معنى مصطلحي الدعوة, والجهود في اللغة والاصطلاح. الفصل الأول: بعنوان بيئة الشيخ عمار, وحياته. وقسمت هذا الفصل إلى مبحثين: المبحث الأول: تناولت فيه بيئة الشيخ عمار بن الأزعر, الاجتماعية, والثقافية, والسياسية. المبحث الثاني: تكلمت فيه عن حياة الشيخ عمار بداية من اسمه, مولده, نشأته, تعليمه, ذكر صفته الخلقية والخُلُقية, شغفه بالعلم وثناء العلماء عليه, أهم شيوخه وتلاميذه, المضايقات التي تعرض لها في قمار, هجرته إلى البلاد المقدسة, وختمته بالكلام عن وفاته وآثاره. الفصل الثاني خصصته لإبراز وبيان جهود الشيخ عمار رحمه الله الدعوية في المجالات التالية: التدريس, التأليف, الفكر, المراسلة, المناظرة, المجال الأخلاقي, والاجتماعي, والاقتصادي, ومجال اللغة العربية, والثورة التحريرية الخاتمة وذكرت فيها أهم النتائج التي توصلت إليها من خلال هذا البحث. التوصيات: أوصيت فيها بجملة من الوصايا بخصوص الشيخ عمار, وآثاره.

Rim Imad Wazni, Ghassan Matar, Tony Abou Fayad

كلية الطب-الجامعة الأمريكية في بيروت · لبنان

Antimicrobial resistance (AMR) is rising at an alarming pace causing a major crisis threatening public health globally. Among various mechanisms of drug resistance, bacterial biofilms, which are layers of microbial cells attached to a surface and buried firmly in an exopolysaccharide matrix, is considered a predominant one. Biofilm associated bacteria are less sensitive to antibiotics than the planktonic cells. Indeed, resistance to gentamicin and ceftazidime in Escherichia coli, tazobactam, and colistin in Klebsiella pneumonia, and ciprofloxacin in Pseudomonas aeruginosa was related to biofilm formation.Since it is becoming increasingly clear that biofilm formation is implicated in the spread of multidrug-resistance, and conventional antibiotics are being inadequate at eradicating biofilm-forming pathogens, it is highly urgent to discover novel molecules that exhibit strong antibiofilm activity and can be combined with antibacterial agents. Fortunately, soil and marine microorganisms are potential natural sources for the isolation of natural compounds with effective biological activities. However, scarce material is found in the literature, and little research is being done about screening for antibiofilm compounds. This study aims to isolate novel antibiofilm compounds produced by environmental bacteria from several regions in Lebanon.Methods: Marine and soil samples were collected from three different areas in Lebanon. Serial dilutions were done on the samples for Actinomycetes isolation. Subsequently, 30μl of each dilution were plated on ISP3 and soil agar. After purification, pure colonies were stored in 50% glycerol at -80C. Then, these selected environmental bacteria were cultivated in 14 different culture media in order to produce secondary metabolites. The latter was then extracted via acetone/methanol and then tested for their anti-biofilm activity against Pseudomonas aeruginosa (PAN14), Staphylococcus aureus (N315), Acinetobacter baumannii (DSM 30008 & T36). Screening of the crude extracts was done in microtiter plates via two assays. The first checks extracts’ potency to inhibit biofilm occurrence, whereas the other evaluates its capacity to inhibit biofilm formation after the film is established.Results: According to our findings, crude extracts derived from the marine sample TBJ13C and soil sample BM9C demonstrated a strong anti-biofilm activity against P. Aeruginosa (PAN14). Both extracts with their hexane and ethyl acetate fractions, respectively, showed highly effective inhibition of biofilm growth, as well as eradication of preformed ones in PAN14. Further, crude extracts produced by MM3, MM7, and MM9 also exhibited significant anti-biofilm activity in preventing biofilm formation, primarily in PAN14, as some had the ability to do so in two other models, namely, Staphylococcus aureus MRSA and Acinetobacter baumannii (T36).Conclusion: Therefore, this process steps forward from a screening hit to phenotypic and biochemical characterization, anti-biofilm compound isolation, molecular characterization, and structure elucidation.

سهام المتيوي

كلية العلوم القانونية والاقتصادية والاجتماعية - طنجة-جامعة عبدالمالك السعدي · المغرب

Mehdi Laghmari , هاجر المرموق

كلية الطب والصيدلة - مراكش-جامعة القاضي عياض · المغرب

Khedidja Benatmane , Sarah Touati , Z Ramdane

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

Ce travail a pour but l’étude des parasites de la sardine Sardina pilchardus peuplant le golfe de Bejaia. La composition de la faune parasitaire a été déterminée à partir de l’examen de 206 poissons aléatoirement échantillonnés durant la période allant du mois d’Octobre 2017 au mois de Mai 2018. Cette étude nous a permis d’identifier trois espèces de parasites (Scolex pleuronectis, Nybelinia sp. et Scolex sp.) infectant tout particulièrement l’estomac et le tube digestif de leur hôte. Parmi ces parasites, 2 espèces (Nybelinia sp. et Scolex sp.) sont signalées pour la première fois le long des côtes algériennes. Nos résultats montrent des indices parasitaires faibles. En conclusion, on peut noter que la sardine résiste très bien aux parasites qu’elle héberge, vu que sa condition n’a été affectée par le parasitisme.

Ratiba Habib Kassem, Tania Haddad

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

Despite the enormous literature on e-government and the factors of adoption of e-government, existing frameworks in this context have been limited to developed countries. This paper highlights the importance and benefits of e-government adoption in local governments, leading to faster and easier public services provision by citizens. It also identifies the interrelated factors which lead to failure or success in e-government. Today, Lebanese some citizens suffer from redundancy during standard operating procedures (SOPs) and when accessing public services because of red tape that dominates traditional public administration. Therefore, improving the functions of municipalities is a crucial step for citizens to gain the trust of their local government; yet, there is little to no data available on e-government practices in Lebanon. Thus, this work will study the efficiency of websites in Lebanon at the local level, particularly in municipalities. It will use a mixed approach by observing the content of the websites of 211 municipalities. The websites will also be evaluated using content analysis, and will be selected using nonprobability sampling, representing 26 districts in Lebanon. In addition, interviews will be conducted with municipalities which have websites in order to better understand the challenges faced and the different factors that influenced the initiation and development of these websites. The research problem that I am trying to address here is summarized in the following questions: What is the importance of e-governance? How can it be adopted? If available, are websites efficient in Lebanese municipalities? If not, what are the ways in which municipality websites can improve? My analysis revealed the main challenges which some municipalities face when initiating and developing their websites, some factors were not identified in the literature. It also helped me to identify the set of factors that can lead to failure or success of e-government in Lebanon. This helped me to give some possible recomm

عبدالرحمان بن زايد, نجية قموح

كلية العلوم الإنسانية والعلوم الاجتماعية-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر

Ghalib A.AL Hashim , Sadiq Sait Mohammed

كلية علوم وهندسة الحاسب الآلي-جامعة الملك فهد للبترول والمعادن · السعودية

A paradigm shift from the traditional distributed control system architecture is proposed to address the obsolescence challenges resulting from the life cycle management of proprietary automation systems. It is based on ubiquitous data-centric architecture using distributed autonomous process interface systems, fault-tolerant and real-time data distribution service middleware, and virtually clustered automation and control servers. Many distributed control system architectures are proposed in the literature; however, none of them is fully based on standard software and hardware technologies. The proposed architecture relies on completely standard computing and networking technologies that can provide flexibility and heterogeneous scalability across multiple vendors. As a result, this new automation architecture will avoid any potential obsolescence challenges and will result in reducing the total cost of ownership from 30% to 66% throughout the life span of the processing facility. In addition, the initial capital cost of grass root process automation investment can be reduced by 20% by eliminating the requirements for environmentally controlled process interface buildings, systems and marshaling cabinets, and wire trays and cablings from junction boxes to process interface buildings.