Jaleleddine Ben Rejeb, Lamia Ben Zid

كلية العلوم الاقتصادية والتصرف - سوسة-جامعة سوسة · تونس

أسامة الخليف, بثينة خلجي, عبدالناصر كعدان

معهد التراث العلمي العربى-جامعة حلب · سوريا

D. Mameri, Hind Mokrane, N. Nameri

المدرسة الوطنية المتعددة التقنيات - الجزائر · الجزائر

Le but de cette étude est la production d'hydrolysats peptidiques à partir de l'hémoglobine bovine. Dans ce sens, les performances de la réaction d'hydrolyse enzymatique ont été étudiées dans un bioréacteur de 2 litres en mode discontinu. Dans une seconde étape, un couplage d'une technique membranaire: l'Ultrafiltration a permis d'obtenir une séparation fine des différents constituants de l'hydrolysat papaïque de l'hémoglobine.

السيدة بن هاشم خناثة, وحيدة بن عبد الله

كلية الآداب واللغات-جامعة أبو بكر بلقايد - تلمسان · الجزائر

إلياس بن ساسي, مصطفى طبشي

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة قاصدى مرباح ورقلة · الجزائر

تهدف هذه الدراسة إلى البحث في موضوع إشكالية تسيير السيولة النقدية باستخدام جدول تدفقات الخزينة في المؤسسات الاقتصادية العمومية الجزائرية، حيث وقع اختيارنا على المؤسسة الوطنية للسيارات الصناعية SNVI فرع ورقلة 840 خلال الفترة الممتدة من سنة 2011 إلى سنة 2014 وذلك بالاعتماد على بياناتها المالية المتمثلة في كل من (الميزانية المالية، حسابات النتائج، جدول تدفقات الخزينة حسب الطريقة المباشرة).خلصت الدراسة إلى أن هذا الجدول لا يمكن الاعتماد عليه بخصوص تسيير السيولة النقدية من خلال القرارات المتعلقة بها والمتمثلة أساسا في تمويل العجز وكذا توظيف الفوائض في ظل غياب سوق مالي فعال، حيث أن غياب هذا الأخير يجعل من الجدول رغم أهميته مجرد قائمة تعكس تغيرات حسابات مالية لفترات مالية مختلفة.

لؤي موفق الحاج علي , نجود عطا الله الحوامدة

كلية الآداب-جامعة جرش · الاردن

محمد منصور بورحلة, محمد بن عيشوش

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة الدكتور يحيى فارس بالمدية · الجزائر

Mohammad Farhat Ali, محمد حسن محمد علقم

كلية العلوم-جامعة الملك فهد للبترول والمعادن · السعودية

Formation of tight emulsions during oil production, in Saudi Aramco's oil fields, has caused a significant increase in demulsifier usage as well as production losses. Our investigation indicated that these tight emulsions are stabilized by solid materials. These solids were separated from various emulsion samples and were analyzed for their composition using various methods such as X-ray Diffraction (XRD), Thermal Gravimetric Analysis (TGA), Differential Scanning Calorimetery (DSC). These data indicate that these solids consist of calcite, wax, asphaltene and resins. Additional work was conducted to further characterize these material. Vapor Pressure Osometry (VPO) was used to determine average molecular weight of those organic material (asphaltene/resin and wax). Simulated distillation of wax samples separated from emulsion sample were also carried out. The results of these investigations indicate that emulsion stabilizing wax material is microcrystalline in nature. These wax crystals as well as Calcite particles adsorb polar fractions of oil (asphaltene/resin). This process alters the wetability of these crystals allowing them to be migrated to oil water interface and contribute to emulsion stability.

رنا هادي صلوحي مهدي الربيعيالربيعي, علاء هاني الجراخ, قاسم كاظم الربيعي

كلية الطب-جامعة بابل · العراق

This cross-sectional and hospital-based study aimed at studying the prevalence of Gram-negative bacteria isolated from eye infections (conjunctivitis and keratitis), molecular detection of quorum sensing genes and virulence factor genes, in addition to studying antibiotic susceptibility for different antibiotics in these isolates. A total of 160 samples from eye swabs were taken from patients who attended Hilla Teaching Hospital, Hilla city, Iraq, and were suffering from keratitis and conjunctivitis. The period of the study extended from February to July 2016. These eye swab samples were subjected to different methods for identification of Gram-negative bacteria according to standard tests using cultural, physiological, and biochemical tests in addition to the Vitek 2 system. It was found that 32 (20%) isolates were recovered, of which 12 isolates (37.5%) were Gram-negative, while 20 isolates (62.5%) belonged to Gram-positive bacteria. Results also showed that out of the 12 Gram-negative isolates, only 2 isolates belonged to Pseudomonas sp., while the other isolates were distributed among Klebsiella spp., Enterobacter cloacae, Escherichia coli, Leclercia adecarboxylata, and Pantoea dispersa. The results of antibiotic susceptibility testing using the Vitek 2 system and disc diffusion test (DDT) of Gram-negative isolates (No. = 12) against 24 antibiotics showed that all isolates were highly sensitive to penicillins (100%) like ampicillin, while they showed variable degrees of resistance to pipracillin and ticarcillin, in addition to high sensitivity to β-lactamase inhibitors like pipracillin-tazobactam and trimethoprim-sulfamethoxazole. Antibiotic resistance for cephalosporins showed that all isolates were sensitive to cefepime, ceftazidime, ceftriaxone, and cefoxitin, but they were all resistant to cephalothin. Isolates also showed high sensitivity towards aminoglycosides like gentamicin, amikacin, tobramycin, fluoroquinolones (ciprofloxacin and pifloxacin), and to colistin, meropenem, chloramphenicol, aztreonam, and minocycline. Results of antibiotic susceptibility patterns showed that most isolates were MDR (Multidrug Resistant), and 75% of isolates were ESBLs (Extended Spectrum Beta-Lactams) producers. Results of siderophore production revealed that only one isolate (K. pneumoniae E147) was positive (8.3%). Capsule production tests found that 7 isolates (58.3%) were capsule producers. Results of protease production tests showed that all isolates (100%) were protease producers, and only 5 isolates (41.6%) were elastase producers. Results of biofilm production tests found that all isolates (100%) were positive; 4 and 8 isolates were strong and moderate biofilm producers, respectively. Results of molecular detection of quorum sensing genes (las I, las R, rhl R, rhl AB, rhl I) showed that the gene las I was present in the E. cloacae E75 isolate. The rhl AB gene was found in the K. pneumoniae E149 isolate, while the gene rhl I was found in P. dispersa E115 and K. pneumoniae E149. The rhl R and las R genes were not found in any ocular Gram-negative bacterial isolate tested. Genetic profiles of ocular Gram-negative isolates revealed the possession of different virulence factors and antibiotic resistance genes. The fyuA gene was the most predominant gene among virulence factor genes, while the TEM gene was the most predominant among antibiotic resistance genes of these bacteria.

رشا رباح شحادة, سبيل جلول

كلية الحقوق والعلوم السياسية والإدارية-الجامعة اللبنانية · لبنان