أحـمد العــوض الفكـي, تســابیـح فــرح بشــري العــاقـب

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

This study was designed to evaluate the Hazard Analysis and Critical Control Points (HACCP)system implemented in pasteurized milk processing line.The critical control points(CCPs) were including raw milk, immediately after pasteurization, after packaging, after two days, four days and six days of storage. Then physicochemical and microbial tests were carried out for the samples taken.The results obtained revealed that the pH value of raw milk was 6.63, and acidity recorded 0.17 as lactic acid, and density recorded 1.03. Protein, fat, lactose, solids not fat and soluble solids recorded 3.00%, 3.50%, 4.42%, 9.90% and 13.10% respectively.Total bacterial count was 5.7×105cfu/ml, total coliforms 5×102MPN/ml, E.coli 7.0MPN/ml, staphylococcus recorded 5.7×102cfu/ml, salmonella, yeasts and moulds were not recorded in raw milk samples.Immediately after pasteurization of milk pH, acidity, density, fat, protein, lactose, solids not fat and total soluble solids recorded 6.63, 0.17%, 1.03%, 3.30%, 3.00%, 4.30%, 9.50% and 13.10% respectively.The microbial analysis recorded values of total bacterial count as 3.8×103cfu/ml, while the samples are free from total coilforms, E.coli, staphylococcus, salmonella, yeast and moulds. After packaging of pasteurized milk pH, acidity, density, fat, protein, lactose, solids not fat and total soluble solids recorded 6.60, 0.17%, 1.03, 3.10%, 3.00%, 4.30%, 9.35% and 13.10%, respectively. On the other hand, total bacterial count was 3.8×103cfu/ml, total coliforms, E.coli, staphylococcus, salmonella, yeasts and moulds were not recorded.During the storage period of pasteurized milk pH was 6.63, 6.50 and 6.36 after 2nd, 4th and 6th days storage period, respectively. Acidity was 0.17%, 0.18% and 0.19% after 2nd, 4th and 6th days storage period, respectively. Density gave 1.03%, 1.03% and 1.03 after 2nd, 4th and 6th days storage period, respectively. Fat was 3.00%, 2.80% and 2.76% after 2nd, 4th and 6th storage days period, respectively. Protein recorded 2.96%, 2.83 and 2.63 after 2nd, 4th and 6th days storage period, respectively. Lactose recorded 4.10%, 4.00% and 3.90 after 2nd, 4th and 6th days storage period, respectively. Solids not fat was 9.30, 8.61 and 8.51 after 2nd, 4th and 6th days storage period, respectively. Finally, total soluble solids gave 13.00%, 12.90% and 12.80% after 2nd, 4th and 6th days storage period, respectively.Total bacterial count after the 6th day was 8.6×105cfu/ml, 4th day was 6.3×104cfu/ml and 2nd day was 4.7×103cfu/ml. The highest level of coliforms was (16.6 and 9.00 MPN/ml) in 6th and 4th, respectively, 2nd day was conformed completely free of this type of bacteria. The highest reading for E.coli, 6th day 7.33MPN/ml, and the 2nd day recorded no presence of E.coli while 4th day was 2.30MPN/ml. Staphylococcus was absent in 2nd day, while the 4th day recorded 4.46×102cfu/ml and 8.0×102cfu/ml was recorded by 6th day. Salmonella was not detected during the storage periods. Yeast and moulds were not detected in 2nd day and 4th day while on 6th day gave 4.0×102cfu/ml.

خليل عمارة ميلود , نبيلة زوالي

كلية الآداب واللغات والعلوم الاجتماعية-جامعة عين تموشنت - بلحاج شعيب · الجزائر

Mohamed Lakrouf , Mohamed Sebah , Z. Kebbouche

كلية العلوم الهندسية-جامعة أمحمد بوقرة - بومرداس · الجزائر

Djeroud Sacia , Fnides Souhair

كلية الرياضيات وعلوم الحاسب وعلوم المواد-جامعة 8 ماي 1945 قالمة · الجزائر

Nous présentons les résultats d’une étude du premier principe des propriétés structurales, électroniques et optiques des composés Li2S, Li2Se et Li2Te, en utilisant la méthode des ondes planes augmentées et linéarisées avec un potentiel total (FP-LAPW) dans le cadre de la théorie de la fonctionnelle de la densité (DFT). On a utilisé l’approximation de la densité locale (LDA) et du gradient généralisé (GGA) pour le potentiel d’échange et de corrélation dans le calcul des propriétés structurales et électroniques. Par contre pour l’étude des propriétés optiques à l’équilibre et pour l’étude de nos différentes propriétés sous l’effet de la pression ; on s’est contenté d’utiliser seulement l’approximation du gradient généralisé (GGA). Le paramètre du réseau est en accord avec les résultats expérimentaux disponibles. Les résultats obtenus pour les propriétés électroniques montrent que les trois composés étudiés sont des semi-conducteurs à gap indirect. La technique de décomposition du spectre de chaque composé donne les positions des pics du spectre optique et la contribution des différentes transitions inter-bandes dans la zone de Brillouin. Le déplacement des pics sous pression vers les plus hautes énergies est dû à l’augmentation du seuil d’absorption et l’élargissement de la majorité des gaps d’énergie

حافظ لعيداني, عصمت محمد بن حمو

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة عبد الحميد بن باديس مستغانم · الجزائر

أحسن مفتاح , شافية زبيرة

كلية العلوم الاقتصادية والعلوم التجارية وعلوم التسيير-جامعة محمد الصديق بن يحيى - جيجل · الجزائر

للوساطة المالية دور مهم في تنمية تعاملات البورصة من خلال قيامها بعملية الربط بين مختلف المتعاملين فيها بغية تسهيل التعاملات و تسريعها.

Alia Chamkha, Kaddour Geurbati

كلية العلوم والتكنولوجيا-جامعة غرداية · الجزائر

considérons dans Cn+1 un opérateur différentiel quasi-linéaire d’ordre deux à caractéristiques simples :P (x,D)u = Pp(x,D)u + f (x,DAu) où Pp est la partie principale de P ,A représente les dérivées de u d’ordre un et f une fonction holomorphe au voisinage de l’origine.soit q ∈ N∗, on suppose que : Pp(x,D)u − Plin(x,D)u = O(uq) où Plin(x,D) est la partie linéarisée, au voisinage de u = 0.On étudie le problème P (x,D)u(x) = v(x) où v estune fonction ramifiée autour des deux hypersurfaces caractéristiques simples Ki: ki =0,(i = 1,2) et dont le comportement au voisinage de K1 ∪K2 est de la forme :| v(x) |≤ c | k1(x) |a1 | k2(x) |a2 a1,a2 ≥1qOn montre alors que u est ramifiée autour de K1 ∪K2 et que| u(x) |≤ c | k1(x) |a1+1| k2(x) |a2+1.fixe.

Seifedin Neffati, Adel Elomri, Tarek El Mekkawy

كلية الهندسة-جامعة قطر · قطر

“Innovation is the difference between leaders and followers” said the famous Apple's CEO, Steve Jobs. The technological advancement was and will always be exploited into delivering a higher quality of life for communities. The Internet of Things (IoT) technology is not excluded from this fact. Nowadays, many countries are building smart cities that are equipped with smart traffic control, environmental monitoring and public safety. Smart waste management is an emerging initiative in this matter. This thesis addresses the application of the IoT in the waste collection systems. It assesses the Periodic Review Policy and the IoT Enabled Policy of waste collection systems. A model was developed for each system using Any logic software. Each model performance was tested using six different waste generation scenarios and seven collection policies. The performance analysis of the models was based on the economic, environmental and citizen satisfaction measures. The results of this research showed that each collection model achieved good performance in a specific scenario. The three times per week periodic review policy performed the best for high waste generation scenarios whereas the 70% threshold IoT enabled policy was the best for low waste generation scenarios.

شيماء دحمون, بوجمعة نقبيل

كلية العلوم الانسانية والاجتماعية-جامعة محمد بوضياف - المسيلة · الجزائر

تهدف الدراسة الحالية الى التعرف على اثر الصدمة النفسية على الممرضين العاملين بمصلحة الأورام بالمؤسسة الاستشفائية بالمسيلة، وقد اشتملت الدراسة على عينة قصدية قوامها 30 ممرضا من كلا الجنسين، واعتمدت الدراسة على أداة استبيان تروماك للصدمة النفسية، واتبعت الدراسة المنهج الوصفي التحليلي، وبعد المعالجة للبيانات توصلت الدراسة الى النتائج التالية: يعاني الممرضين العاملين بمصلحة الأورام بالمؤسسة الاستشفائية الزهراوي بالمسيلة من تناذرات ومظاهر وترددات صدمة نفسية بدرجة قوية

Amel Ouazani , Hadjer Benaichouba , Mourad Kaddeche

كلية العلوم والتكنولوجيا-جامعة الجيلالي بونعامة - خميس مليانة · الجزائر