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متلازمة الابنية المريضة بين الحضر والريف : دراسة مقارنة Sick buildings syndrome between the Urban and Rural areas : A comparative study

اسم المؤلف: ســرمـد قاسـم مـحمــد الـتميمي
اسم المشرف: عدنان نعمة عبد الرضا العزاوي عامر محمد ابراهيم
الموضوع العام: علوم الحياة
السنة: 2015
الموضوع الدقيق: الاحياء المجهرية
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: ديالى
الصفحات الاولى:
المستخلص: اجريت هذه الدراسة الميدانية في محافظة ديالى للفترة الواقعة بين 1/تشرين الاول/2014 ولغاية 1/اذار/ 2015 وشملت مناطق حضرية ومناطق ريفية واخرى وسطية في طور التحول ،بهدف التعرف على الاثار الصحية للملوثات البيئية(الكيميائية والفيزيائية والحيوية) في الاماكن المغلقة مع بيان الفرق في نسب تلك الملوثات بين مناطق الدراسة. تضمنت الدراسة توزيع 150 استمارة استبيان تحتوي على الجنس ،مجموعة من الظروف البيئية ومجموعة من الاعراض المرضية والتي تشير الى وجود بيئة مريضة ، بواقع 50 استمارة لكل منطقة .وتم قياس تركيز الغازات اول اوكسيد الكاربون (CO)، وثاني اوكسيد الكاربون (( CO2 ،وثاني اوكسيد النتروجين(NO2) في داخل المبنى وفي خارجه باستعمال جهاز تحليل الغازات Portable Gas Analyzer وكذلك قياس درجة الحرارة والرطوبة النسبية في داخل المبنى. كما تم جمع 150 مسحة بكتيرية بواقع 50 مسحة لكل منطقة وذلك من مصادر بيئية مختلفة شملت المطابخ، الصحيات وغرف النوم وتم تشخصيها مختبريا،اضافة الى اجراء فحص الحساسية الدوائية تجاه مجموعة من مضادات الحياة للعزلات المشخصة . بينت نتائج الدراسة الحالية ان اعراض متلازمة المباني المريضة Sick Building Syndrome (SBS) مثل العصبية ،الصداع ، ضيق التنفس ، جفاف العين وجفاف الجلد كانت اكثر ظهورا لدى سكان المناطق الحضرية اذ بلغت نسبتها32.5%، 32.4%،24.4%، 20.5%، 17.1 % على التوالي، في حين كانت اقل ظهورا لدى سكان المنطقة الوسطية وكانت قليلة جدا لدى سكان المنطقة الريفية وكانت الاعراض الدوران، تشتت الانتباه ، تهيج الانف، وتهيج العين، اكثر ظهورا لدى سكان المنطقة الوسطية اذ بلغت نسبتها 27% ،24.8%،23.3%، 12.2% على التوالي،وايضا كانت اقل ظهورا لدى سكان المنطقة الريفية. وكانت الاعراض الصداع، جفاف العين ،تهيج العين وجفاف الجلد اكثر ظهورا على الاناث من الذكور، في حين ان الاعراض العصبية والانزعاج والدوران كانت اكثر ظهورا على الذكور. وبينت النتائج ان عوامل الخطر البيئية المساعدة على حدوث الاعراض مثل التعرض الى سوء التهوية ، الروائح الكريهة وضعف الاضاءة الطبيعية كانت متوافرة في البيئة الحضرية بصورة اكثر وبنسب 28.6%،22.4%،20.4% على التوالي ، في حين ان التعرض الى الغبار والهواء الجاف كان بنسب اعلى لدى سكان المنطقة الوسطية وبنسب27.1%،23.2% على التوالي. وكانت الظروف البيئية بنسب اقل لدى سكان المنطقة الريفية. اما نتائج قياس تركيز الغازات CO، CO2،NO2 فقد كانت اعلى تركيزا في المناطق الحضرية وبنسب 2.62 جزء بالمليون ، 0.13 جزء بالمليون ،0.20 جزء بالمليون على التوالي ، في حين كانت الاقل تركيزا في المناطق الريفية والتي بلغت 0.10 جزء بالمليون، 0.006 جزء بالمليون، 0.06 جزء بالمليون على التوالي. لم تكن هناك فروق معنوية بالنسبة لقياس درجات الحرارة والرطوبة،اذ بلغ معدل درجة الحرارة في المنطقة الوسطية 23.9م تلتها المنطقة الحضرية 21.8م ، وسجلت في المنطقة الريفية اقل درجة 21.6م .اما بالنسبة للرطوبة النسبية تفوقت المنطقة الريفية باعلى نسبة للرطوبة فبلغت 58.9%، وتلتها المنطقة الحضرية55%، وتمثلت المنطقة الوسطية باقل نسبة للرطوبة 54.8% اما بالنسبة لنتائج العزل البكتيري فقد المنطقة الريفية اعلى نسبة للنمو الايجابي اذ بلغت 46 من اصل50 عينة وبنسبة (92%)،تلتها المنطقة الوسطية 35 من اصل 50 عينة وبنسبة (70%) ، وجاءت المنطقة الحضرية باقل نسبة 24 من اصل 50 عينة وبنسبة(48%)، في المنطقة الريفية كانت البكتريا الموجبة لصبغة كرام هي السائدة اذ شكلت بكتريا Staphylococcus aureus اعلى نسبة (43.4 %) وEscherichia coli (19.5%) اما الاجناس pseudomonas aeruginos وpneumoniae Streptococcus فقد بلغ كل منهما (10.8%) وبلغت pneumonia klebsiella (4.3%). وفي المنطقة الوسطية كانت ايضا البكتريا الموجبة لصبغة كرام هي السائدة فقد شكلت S. aureus (42.8%) تلتها E.coli (20%) وP. aeruginosa (17.1%) وpneumoniae S . (8.5%) واحتلت K. pneumonia المرتبة الاخيرة (2.8%) . اما في المنطقة الحضرية فقد كانت البكتريا السالبة لصبغة كرام هي السائدة فبلغت نسبة P. aeruginosa وS. aureus (33.3%) وبلغت نسبة الاجناس E.coliو pneumoniaeK. ،و pneumoniae S.، (12.5%) ،(8.3%) ، (4.1%) على التوالي . وبينت نتائج فحص الحساسية تجاه المضادات اوجمنتين (Augmentin)، والامبسلين Ampicillin)) ،والتوبرومايسين Tobramycin) )،والامبينيم ( Imipenem) ان معظم الاجناس كانت متحسسة وبنسب متفاوتة،الا ان بعض الاجناس ابدت مقاومة تجاه انواع معينة منها. | This field study was conducted in Diyala province for the period between 1/10/2014 until 1/3/2015 included urban areas and rural areas and other centrist in transition, with a view to identifying the health effects of environmental contaminants (chemical, physical and biological) in enclosed spaces with the difference in the proportions of those pollutants between the study areas. It includes the distribution of 150 a questionnaire containing, sex set of environmental conditions and a set of symptoms that indicate the presence of sick environment, by 50 for each form region and concentration measurement of gases (CO, CO2, NO2) inside the building and outside by using Portable Gas Analyzer as well as temperature and relative humidity In inside the building. He also collected 150 bacterial swab 50 swab for each area,from different environmental sources included kitchens, bedrooms and Health facilities and laboratory - diagnosed, as well as a test of sensitivity to a range from antibiotic of the isolates diagnosed. The results showed that Sick Buildin Syndrome symptoms such as nervousness, headaches, shortness of breath, eyes dry and skin dryness were at ahigher rate in urban areas as the average 32.5%,32.4%, 24.4%, 20.5% 17.1% respectively, while less visible in the middle of the region and were very few the rural of the region, symptoms were Rotation, Attention Deficit, irritation of the nose, eye irritation, more common the middle of the region as the average of 27%, 24.8%, 23.3% , 12.2%, respectively, and Less amonge to the population of the rural area. symptoms as headache, eye dry, eye irritation, dryness of the skin were more amonge females than males, while the symptoms as neurological , discomfort, and the rotation was more pronounced on males. The results showed that environmental risk factors help symptoms occur, such as vulnerability to poor ventilation, odors and poor natural light available in a more urban environment as the average 28.6%, 22.4% , 20.4% respectively, whereas exposure to dust and dry air was higher among residents of the middle region as the average of 27.1%, 23.2% respectively and environmental conditions were lower in the rural area. The results concentration of measurment gases (CO, CO2, NO2) were higher in the urban areas, as average ( 2.62 ppm, 0.13 ppm, 0.20 ppm) respectively, while the less concentrated in rural areas, which reached (0.10 ppm, 0.006 ppm, 0.06 ppm) respectively, There was no significal differences for measurement of temperature and humidity, with an average temperature in the middle region ( 23.9)m followed by the urban area of (21.8) m, recorded in rural lower (21.6 )m .for relative humidity overtook the rural area with the highest percentage of humidity, reaching 58.9%, followed by urban area 55%, and middle area was the lowest 54.8%. The results of bacterial isolation region showed the highest Percentage in the rural isolation 46 sample (92%), followed by the middle region 35 sample (70%)and urban area with less than 24 sample (48%). the rural area showed the positive it for bacteria gram stain were most common , accounting Staphylococcus aureus bacteria highest percentage (43.4%) , Escherichia coli (19.5),the races, pseudomonas aeruginosa and Streptococcus pneumoniae were each (10.8%) and klebsiella pneumonia (4.3%). In the middle area the positive it for bacteria gram stain were most common accounting S. aureus might formed (42.8%) Followed by E. coli (20%) , P. aeruginosa (17.1%) , S. pneumonia (8.5%)and K. pneumonia ranked last (2.8%) In the urban area negative it for bacteria gram stain were most common accounting P. aurgenosa and S. aureus was (33.3%) and the result of species E. coli, K. pneumonia and S. pneumonia were (12.5%) (8.3%) (4.1%) respectively. the results of sensitivity to antibiotics Augmentin, Ampicillin, Tobramycin, Imipenem ,that most strain were resistance in varying percentage, some strain have expressed resistance towards certain types

دراسة جزيئية ومناعية لالتهاب الكبد الفيروسي نمط جـ لمرضى الثلاسيميا في محافظة النجف الاشرف - العراق Molecular and immunological study for Hepatitis C virus in Thalassemia patients in AL - Najaf AL - Ashraf / Iraq

اسم المؤلف: ناديه حبيب سرحان الشيباني
اسم المشرف: موسى نعمة مزهر جميل جري يوسف
الموضوع العام: علوم الحياة
السنة: 2015
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: النجف
الصفحات الاولى:
المستخلص: This study was conducted to detect the infection percentage of Hepatitis C Virus (HCV) in the samples of thalassemic patients in AL - Najaf Governorate.About 130 suspected cases attending AL - Zahra'a hospital for children and delivery in Al - Najaf city during period from 1st of November (2014) to 28thof April (2015).Only 69 samples were carried out in this study .The practical side for this study followes three main paths : 1 - The Molecular identification of the presence of Ribonuclic acid of Hepatitis C virus in Thalassemic patients by using RT - PCR.2 - Using the Enzyme Linkedimmunosorbant assay (ELISA - III)technique to determinate immunological markers anti - HCV IgG and interleukine - 28B (IL - 28B).3 - Using theCYANHemato devicefor the purpose of counting blood cells which is called Coulter - Method to give a Complete blood count(CBC).The overall results obtained in this study were as follows : - Out of 69 samples,25(36%) samples of thalassemic patients were infected with Hepatitis C virus, 16 male and 9 female ,their age range from (4 - 43) years ,while 44(64%) samplesof thalassemic patients were withoutHepatitis C virus infection , 22 male and 22 female, their age range from (3 - 35) years . - The result showed that 25samples seropositive to anti - HCV IgG in all age groups where the age group (10 - 20) years old has thehighest percentage among other age groups. - The result of the examination of HCV - RNA Eleven of (25) HCV seropositive patients were positive to RT - PCR technique. - The result of this study showed that level of Interleukin - 28Bin thalassemic patients with HCV was high (mean or significant) (12733.33) pg/ml as compared with thalassemic patients without HCV (270.0463) pg/ml and control(12.1267)pg/ml. - The result also has revealed that the hematological parameters of white blood cells (WBCs),monocytespercentage (MON) and lymphocytes percentage (LYM) significantly have increased (P<0.05) in Hepatitis C patients compared to those of control group. - Granulocytes(GRA) showed a significant decrease (P<0.05) in percentage in Hepatitis C patients compared to those of control groups.

دراســـــة بعض المعايـــــير الجزيئيـــــة والمناعيـــــة لبكتيريا Staphylococcus aureus المقاومة للمثيسيلين والمعزولة محليا من الاصابات الجلدية المكتسبة مجتمعيا

اسم المؤلف: هدى سعد عزاوي
اسم المشرف: سلمان عزيز سميرة كاظم
الموضوع العام: علوم الحياة
السنة: 2015
الموضوع الدقيق: علوم الحياة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: النجف
الكلمات الدلالية:
  • المكورات العنقودية الذهبية
  • الخراج ونضح الجروح
  • الاصابات الجلدية
الصفحات الاولى:
المستخلص: تعد البكتيريا العنقودية الذهبية المقاومة للمثيسيلين المكتسبة مجتمعيا من الكائنات المجهرية المرضية التي تسبب طيفا واسعا من الاصابات في مختلف بقاع العالم في اماكن مختلفة من جسم الانسان اذ اقترنت امراضيتها مع اصابات الجلد والانسجة الرخوة . تهدف هذه الدراسة الى التعرف على مدى انتشار هذه البكتيريا في حالات اصابة انسجة الجلد المختلفة ,واجراء تقييم جزيئي لهذه البكتيريا المعزولة من حالات مرضية مختلفة , وتقييم مستوى بعض الحركيات الخلوية في مصول المرضى . وقد اشتملت على 169 عينة اخذت من المرضى المصابين بالتهابات الجلد المختلفة كـ الدمامل والخراج الجلدي والجروح والقدم المصابة بالقرحة لدى مرضى السكري وعدوى الحروق والحصف (القوباء) واخذت من المرضى الذين يراجعون العيادات الخارجية , والمراكز الصحية , وكذلك العيادات الخاصة, لمدة امتدت اكثر من خمسة اشهر , وللفترة من تشرين الاول 2014 م وحتى اذار2015 م. تضمنت الدراسة الحالية اخذ مسحات من الجلد المصاب بالالتهابات المرضية المختلفة وعينات دم ,من بين 169 عينة ,76 عزلة فقط اثبتت عائديتها الى جنس المكورات العنقودية الذهبية وبنسبة 45% من العزلات الماخوذة من حالات مختلفة لاصابة الجلد , وكان معدل العزل العام للعنقوديات الذهبية من القدم المصابة بالقرح لدى مرضى السكري 5 عزلات بنسبة 33% نسبة العزلات المقاومة للمثيسيلين 20% (عزلة واحدة ),اما المصابين بخراج الجلد والدمامل والقوباء الجلدي فكان معدل عزلها كالاتي (69)18 %,(55)21% , (31)9%,نسبة العزلات المقاومة للمثيسيلين (55.6)10% , (61.9)13%, (11.11)1% على التوالي . ان معدل عزل هذه البكتيريا من عدوى الجروح والحروق فكانت كالاتي (32)11%, (44)12% نسبة العزلات المقاومة للمثيسيلين منها (72.7)8%% (16.6)2, على التوالي . ان العزلات البكتيرية من المكورات العنقودية الذهبية المكتسبة مجتمعيا مقاومة لجميع مضادات البيتالاكتام وغير مقاومة للمضادات الحيوية التي لا تنتمي الى هذه المجموعة. اجري الكشف الوراثي باستعمال تقنية سلسلة تفاعلات البلمرة polymerase chain reaction اذ شخصت العزلات الخمسة والثلاثين باستعمال 3 جينات وهم mec Agene وهو الجين الخاص بالمقاومة للمثيسيلين , وكان عدد العزلات الحاملة لهذا الجين 22 عزلة من اصل 35 عزلة وبنسبة 62% . واخضعت العزلات المقاومة للمثيسيلين الى عملية تعريف للقطعة الكروموسومية النوع الرابعSCCmec IV اذ يعد هذا النوع سمة تفريقية للعزلات البكتيرية من المكورات العنقودية الذهبية المقاومة للمثيسيلين والمكتسبة في المجتمع ، اذ وجدت بنسبة 100 % . كذلك تم التحري عن امكانية تواجد مورثة الذيفان الخارجي Panton Valatine leukocidine ( pvl ) باستعمال تقنية تفاعلات البلمرة PCR اذ شخص في 19 عزلة بكتيرية بنسبة 54% ، اقترن وجود السم بالاخص مع حالات الاصابة بالدمامل والخراج والجروح . اجريت الفحوصات المناعية عند المصابين بالتهاب انسجة الجلد , وذلك من خلال تقييم مستوى بعض الحركيات الخلوية مثل IL - 8 وLTB - 4 باستعمال طريقة الممتز المناعي المرتبط بالانزيم Enzyme linked Immune Sorbant assay وقد لوحظ زيادة معنوية في تراكيزها في مصول المرضى مقارنة بعامل السيطرة . | Community acquired methicillin resistant Staphylococcus aureus is one of the pathogenic micro - organism that cause a wide spectrum of infections in different sites of the human body where their pathogenicity is related to skin and soft tissue infection. This study is aimed to explore the role of this bacteria in different cases of skin infections.The genetic structure of these isolated strains of Staphylococcus aureus was also one of this study targets to evaluate immunological response by measurement of concentration of some cytokines as indicator of immune response. One hundred sixty nine patients with different cases of skin infection were enrolled in this study by taking one skin swab from each patient with different skin infection as Furuncle, boil, wound infection, impetigo and burns infection. All these cases were taken from out - patient clinics and private clinic along 5 months period from October 2014 to march 2015 in AL - Najaf Province , From the 169 swab samples only 76 swabs were shown to be positive Staphylococcus aureus with percent 45%.The percent of isolates of S. aureus from different cases of skin infection (5) isolates from diabetic foot with 20% of them are Methicillin resistant (one isolate) and skin abscess, boil, and impetigo were 18(69%),21(55%),9(31%)from which methicillin resistant were 10(55.6%), 13(61%) and 1(11.11%) respectively Percent of isolates from wound &burns infection were 11(32%) and 12(44%) and methicillin resistant isolates were 8 (72.7%) and 2(16.6%) respectively . The process of diagnosis of methicillin - resistant isolates was performed by using sensitivity test for cifoxitin following (CLSI,2014) instruction . Only 35 isolate showed resistant to methicillin when Cefoxitin disk was used then antibiotic sensitive test for other antibiotic disks done., Isolates of CA - MRSA showed resistant to all β - Lactam antibiotics and also to other drugs that are not belonged to this type of antibiotics. Genetic study was evaluated by using PCR technique to diagnosis the following genes in 35 isolates : mecA gene : which is considered responsible for methicillin resistant ,it was found that only 22 from 35 isolates (62%)carrying the gene. SCCmec IV gene which restricted only to Community acquired isolates of Staphylococci were explored in the isolates which considered a diagnostic character for Community acquired Staphylococci and this gene was found in 100% of isolates . Exotoxin panton - valatine toxin also diagnosed in 19 isolates with percent 54% in isolates of S. aureus using PCR technique. This exotoxin was produced in cases of Furuncle, skin abscess, and wound infection . Immunological test was introduced in this study to evaluate the innate immune response by measuring the concentration of Cytokines IL - 8&LTB4 which showed significant elevation in their concentration in comparison with healthy persons.

دراسة بعض العوامل البيئية المؤثرة في بعض انواع القشريات في نهر الكوفة Study Som of Enviromental factors offecting Some Crustacea species in the Kufa river

اسم المؤلف: ايمان حساني شباط السلامي
اسم المشرف: جاسم حميد رحمة الخزاعي
الموضوع العام: علوم الحياة
السنة: 2015
الموضوع الدقيق: علوم الحياة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: النجف
الصفحات الاولى:
المستخلص: اجريت هذه الدراسة للتعرف على انواع القشريات وانتشارها في نهر الكوفة , وتاثير بعض العوامل البيئية على تواجدها , اذ جمعت عينات الدراسة شهريا للمدة من اب 2014 لغاية تموز 2015 من ثلاث محطات , الاولى : تقع شمال جسر الامام علي (عليه السلام) والثانية قرب مبزل ميسان والمحطة الثالثة قرب جسر الكوفة القديم ( قريبة من دار ضيافة المحافظة ) , اذ قيست العوامل البيئية الفيزياوية والكيمياوية مثل درجة الحرارة والاس الهيدروجيني والاوكسجين المذاب والمتطلب الحيوي للاوكسجين والتوصيلية الكهربائية والكدرة , والعسرة الكلية وايون الكالسيوم . تراوحت الحدود الدنيا والعليا لحرارة الهواء 14.3) - 42.6 ) مo وحرارة الماء (13 - 30.4) مo والاس الهيدروجيني 6.8) - 9.6 ) والاوكسجين الذائب 2.9) - 9.1 ) ملغم / لتر والمتطلب الحيوي للاوكسجين 0.7) - 4.7 ) ملغم / لتر والتوصيلية الكهربائية 1162) - 2055 ) مايكروسيمنز/ سم والملوحة 0.7) - 1.31 ) جزء بالالف والكدرة 1.4) - 17.5) نفثالين وحدة كدرة والعسرة الكلية 210) - 930 ) ملغم / لتر وايون الكالسيوم 119 ) - 380 ) ملغم / لتر . تم خلال الدراسة الحالية تسجيل جديد لنوعين من القشريات الكبيرة لاول مرة في نهر الكوفة وهما الروبيان النهري Macrobrachium nipponense والسرطان النهري Potamon magnum اللذان يعودان الى رتبة عشارية الاقدام Decapoda , اذ سجل اعلى كثافة للروبيان النهري 63.58 ) ) فرد / م 3 في المحطة الاولى في شهر تشرين الاول واختفى في محطات الدراسة جميعها في شهر كانون الثاني وشباط , بينما سجل اعلى كثافة للسرطان النهري 32.89) ) فرد / م 3 في المحطة الاولى في شهر نيسان . وتم تشخيص 32 وحدة تصنيفية تعود الى رتبتين من القشريات الصغيرة , وهي رتبة Cladocera ورتبة Copepoda اذ وجد ان رتبة Cladocera هي الاكثر وفرة وغزارة في محطات الدراسة اذ تضم خمسة وعشرون نوعا , بينمراتبة Copepoda تضم سبعة انواع.تم تشخيص ثمانية اجناس من رتبة متفرعة اللوامس Cladocera وهي Bosmina , Daphnia , Ceriodaphnia , Simocephalus , Alona , Chydorus , Macrothrix وMonia , في جميع محطات الدراسة , ومن الاجناس التي سجلت اعلى كثافة هي جنس Bosmina وDaphnia بينما سجل الجنسين Macrothrix وMonia اقل كثافة اذ اختفت في معظم اشهر الدراسة وفي جميع محطات الدراسة. وتم تشخيص اربعة اجناس من رتبة مجذافية الاقدام Copepoda وهي Cyclops , Diaptomus , Microcyclops , Macrocyclops , ومن الاجناس التي سجلت اعلى كثافة هو جنس Cyclops ومن الاجناس التي سجلت اقل كثافة هو جنس Diaptomus . وتم تسجيل جديد لاحدى عشر نوع من القشريات الصغيرة Microcrustacea لاول مرة في نهر الكوفة تعود لرتبتين هما Cladocera وCopepoda وهذه الانواع هي umholtzil Daphnia , Daphnia galeata , Daphnia magna , Daphnia retrocurva , Simocephalus sexpinosus , Alona affinis , Chydorus gibbus , Monia micrura , Cyclops strenuous , Macrocyclops albidus , Microcyclops sp . , اظهرت نتائج التحليل الاحصائي وجود علاقة ارتباط بين كثافة القشريات والعوامل الفيزياوية والكيمياوية المقاسة شهريا ولمدة عام , كذلك لوحظ وجود فروق معنوية بين اشهر ومحطات الدراسة بالنسبة لكثافة القشريات والعوامل الفيزياوية والكيمياوية عند مستوى P ≤ 0.05 . | This study was conducted to identify the types of Crustaceans and distribution in Al - Kufa River and the effect of some environmental factors on their presence , Study samples were collected monthly for the period from August 2014 to July 2015 of three stations, the first station is located north bridge Imam Ali , the second near the Missan trocar and the third station near old Kufa bridge . The Environmental factors, were measured ( physical and chemical) such as temperature , pH , dissolved oxygen, , electrical conductivity, salinity , turbidity ,total hardness (T . H) and calcium ion. Lower and upper limits for air temperature ranged from (14.3 - 42.6) Co and water temperature (13 - 30.4) C0 , pH (6.8 - 9.6) , dissolved oxygen (2.9 - 9.1) mg / L , the biological oxygen demand (BOD5) (0.7 - 4.7) mg / L), electrical conductivity (1162 - 2055) µs/ cm and salinity (0.7 - 1.31) ppt , turbidity (1.4 - 17.5) NTU, total hardness (210 - 930) mg / L and calcium ion ( 119 - 380) mg / L. During the current study, a new record of two species of Macrocrustaceans for the first time in AL - Kufa River Macrobrachium nipponense and river crab Potamon magnum which they return to the Order Decapoda, The highest density was recorded for the M. nipponense (63.58) individual / m 3 in the first station in October month and disappeared in the study, all stations at January and February, months , while the highest density of river crab P. magnum record (32.89) individual / m 3 in the first station in April month. in this study diagnosed 32 taxonomic unit return to Microcrustacea : Cladocera and Copepoda orders , also cladocera reverded where found that the most abundant and the abundance of plants in the study are Cladocera rank as comprising twenty - five type, while Copepoda rank of seven . Diagnosed eight genus belong to the Cladocera such as Bosmina, Daphnia, Ceriodaphnia, Simocephalus, Alona, Chydorus, Macrothrix, Monia, in all study stations, The genera Bosmina and Daphnia recorded high density while Macrothrix and Monia recorded low density which disappeared in the most study month in all study stations. Also four genera of the Copepoda were diagnose such as Cyclops, Diaptomus, Microcyclops and Macrocyclops, and genus Cyclops record high density while the genus Diaptomus recorded low density. eleven species of Microcrustacea were recorded for the first time in AL - Kufa River belonging to the Cladocera and Copepoda orders and these species are Daphnia umholtzil, Daphnia galeata, Daphnia magna, Daphnia retrocurva, Simocephalus sexpinosus, Alona affinis, Chydorus gibbus, Monia micrura , Cyclops strenuous, Macrocyclops albidus, and Microcyclops sp. Statistical analysis showed a correlation relationship between the density of Crustaceans and the physical and chemical factors measured per month for one year, also noted that there were significant differences between months and study stations for the intensity of Crustaceans and the physical and chemical factors at P ≤ 0.05

دراسة تاثـير المستخلصات المائيـة لنباتي الليمـون الحامـض والسعـد في ذكور الجرذان البيض السليمة والمصابة تجريبيا بداء السكري Studying the Effect of Aqueous Extract of Citrus limon and Cyperus rotandus in alloxan induced in Diabetic Male Albino Rats

اسم المؤلف: زهراء كريـم عبد الله حسن الميالي
اسم المشرف: زينب شنيور مهـدي الطرفـي
الموضوع العام: علوم الحياة
السنة: 2015
الموضوع الدقيق: علوم الحياة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: النجف
الصفحات الاولى:
المستخلص: داء السكري هو اضطراب ايضي مزمن يتصف بارتفاع سكر الدم مع اضطراب في ايض الكاربوهيدرات والدهون والبروتين نتيجة لخلل في افراز الانسولين من قبل البنكرياس ، او تاثيره الحيوي اوكليهما، يشكل هذا الداء تهديد خطير ومتزايد على حياة الكثير من الناس ويعد المشكلة الرئيسية التي تودي بحياة الملايين، وما للنباتات الطبية اثر مهم في صحة الانسان كونها مصدرا مهما للعديد من الادوية والمستحضرات الطبية , وتكمن الفائدة الطبية لهذه النباتات في قابليتها على انتاج العديد من المركبات الكيميائية ذات الخصائص الصيدلانية التي تدخل كمادة اولية او عوامل مساعدة في صناعة الادوية ولكثرة استخدام الاعشاب (النباتات الطبية) في الوقت الراهن بوصفها الطب البديل جاءت هذه الدراسة . اجريت هذه الدراسة الحالية في كلية التربية للبنات / جامعة الكوفة للمدة من 2014/10/1 م ولغاية 2015/5/30 م وتضمنت الدراسة تحضير المستخلص المائي الحارلكلا النباتين (بذور الليمون الحامض Citrus limon ودرنات السعد (Cyperus rotundusوقد تضمنت الدراسة متابعة (42) حيوان من ذكور الجرذان البيض ، وتم تقسيمها الى سبعة مجاميع تضمنت كل مجموعة ستة ذكور ، اذ جرعت المجموعة الاولى فمويا بمحلول الملحي الفسيولوجي حسب وزن الجسم واعتبرت كمجموعة سيطرة (سالبة) ، اما المجموعة الثانية فقد حقنت تحت الجلد بالالوكسان (1 مل) واعتبرت كمجموعة سيطرة مصابة (موجبة)، اما المجموعة الثالثة فقد جرعت فمويا بالمستخلص المائي الحار لبذور الليمون الحامض بتركيز (500ملغم/كغم) بتركيز (750ملغم/كغم) وحسب وزن الجسم ، والمجموعة الرابعة جرعت فمويا بالمستخلص المائي الحار لدرنات السعد حسب وزن الجسم ، والمجوعة الخامسة فحقنت بالالوكسان تحت الجلد ومن ثم جرعت فمويا المستخلص المائي الحار لبذور الليمون الحامض بتركيز (500ملغم/كغم) وحسب وزن الجسم، والمجموعة السادسة التي حقنت بالالوكسان تحت الجلد ومن ثم تم تجريعها فمويا المستخلص المائي الحار لدرنات السعد بتركيز (750ملغم/كغم) حسب وزن الجسم ، واخيرا المجموعة السابعة التي حقنت بالالوكسان تحت الجلد ومن ثم جرعت فمويا بعقار الاميرال (Glimepiride) بتركيز (0.1) ، علما ان التجريع قد استمر لمدة ثلاثين يوما كاملا وبواقع مرة واحدة يوميا .وقد اظهرت نتائج الدراسة ما يلي :  حصول انخفاض معنوي (P< 0.05) في وزن الجسم واوزان الاعضاء (البنكرياس والكبد والكلية) لدى مجموعة السيطرة الموجبة(المحقونة بالالوكسان) عند مقارنتها بالمجاميع : السيطرة السالبة والمجموعتين المعاملتين بالمستخلص المائي الحار لبذور الليمون الحامض ودرنات السعد على التوالي والمجموعة المعاملة بالالوكسان وعقار الاميرال وكذلك المجموعتين المعاملتين بالالوكسان ومستخلص النباتين المذكورين على التوالي، وعلى النقيض من ذلك فقد اظهر وزن الجسم وكذلك اوزان الاعضاء ارتفاعا معنويا (P< 0.05) لدى المجموعتين المصابتين تجريبيا بداء السكري والمعاملتين بمستخلص النباتين كلا على حدا عندما تقارن بمجموعة السيطرة الموجبة.  وجود انخفاض معنوي (P< 0.05) في التعداد الكلي لخلايا الدم البيض وكريات الدم الحمر وتركيز الهيموغلوبين والصفيحات الدموية عند الحيوانات المصابة تجريبيا بداء السكري عند مقارنتها مع المجاميع : السيطرة السالبة والمجموعتين المعاملتين بالمستخلص المائي الحار لبذور الليمون الحامض ودرنات السعد على التوالي والمجموعة المعاملة بالالوكسان وعقار الاميرال وكذلك المجموعتين المعاملتين بالالوكسان ومستخلص النباتين المذكورين على التوالي ، على العكس من ذلك حصول ارتفاع معنوي (P< 0.05) في مجموعة الحيوانات السليمة لدى المجموعتين المصابتين تجريبيا بداء السكري والمعاملتين بمستخلص النباتين كلا على حدا عندما تقارن بمجموعة السيطرة الموجبة . حصول ارتفاع معنوي (P< 0.05) في مستويات الكلوكوز ، الكولسترول الكلي الكليسيريدات الثلاثية ، والبروتينات الدهنية واطئة الكثافة والواطئة الكثافة جدا وحصول انخفاض معنوي (P< 0.05) في مستوى البروتينات الدهنية عالية الكثافة لدى مجموعة السيطرة الموجبة عند مقارنتها مع المجاميع : السيطرة السالبة والمجموعتين المعاملتين بالمستخلص المائي الحار لبذور الليمون الحامض ودرنات السعد على التوالي والمجموعة المعاملة بالالوكسان وعقار الاميرال وكذلك المجموعتين المعاملتين بالالوكسان ومستخلص النباتين المذكورين على التوالي ، وكذلك حصول انخفاض معنوي (P< 0.05) في المعايير المذكورة اعلاه وارتفاع في البروتينات الدهنية عالية الكثافة في مجموعة الحيوانات السليمة ولدى المجموعتين المصابتين تجريبيا بداء السكري والمعاملتين بمستخلص النباتين كلا على حدا عندما تقارن بمجموعة السيطرة الموجبة . وحصول ارتفاع معنوي (P< 0.05) في فعالية الانزيمات الكبدية ALT, AST وALp والبلروبين لدى مجموعة السيطرة الموجبة عند مقارنتها مع المجاميع : السيطرة السالبة والمجموعتين المعاملتين بالمستخلص المائي الحار لبذور الليمون الحامض ودرنات السعد على التوالي والمجموعة المعاملة بالالوكسان وعقار الاميرال وكذلك المجموعتين المعاملتين بالالوكسان ومستخلص النباتين المذكورين على التوالي ، وحصول انخفاض معنوي (P< 0.05) في فعالية الانزيمات اعلاه في مجموعة الحيوانات السليمة ولدى المجموعتين المصابتين تجريبيا بداء السكري والمعاملتين بمستخلص النباتين كلا على حدا عندما تقارن بمجموعة السيطرة الموجبة . حصول انخفاض معنوي (P< 0.05)في مستوى البروتين الكلي والالبومين والكلوبيولين لدى مجموعة السيطرة الموجبة عند مقارنتها مع المجاميع : السيطرة السالبة والمجموعتين المعاملتين بالمستخلص المائي الحار لبذور الليمون الحامض ودرنات السعد على التوالي والمجموعة المعاملة بالالوكسان وعقار الاميرال وكذلك المجموعتين المعاملتين بالالوكسان ومستخلص النباتين المذكورين على التوالي ، وحصول ارتفاع معنوي(P< 0.05) في في مجموعة الحيوانات السليمة ولدى المجموعتين المصابتين تجريبيا بداء السكري والمعاملتين بمستخلص النباتين كلا على حدا عندما تقارن بمجموعة السيطرة الموجبة . اشارت نتائج الدراسة النسجية للكبد حصول تغير نسجي للكبد في حالة ارتفاع السكر بالدم تمثل بحصول توسع بسيط بالجيبانيات ،واحتقان دموي مع حدوث تنخر للخلايا الكبدية ونزف فيها ، وظهور مناطق التهابية عدة واستسقاء مائي وبعد معاملة المجموعة المصابة بالمستخلص المائي لكلا النباتين لوحظ رجوع الشكل الطبيعي للخلايا الكبدية . اشارت نتائج الدارسة النسجية للكلية حصول تغير نسيجي فيها في حالة ارتفاع الكلوكوز بالدم والمتمثل بخروج الانوية من الكبيبة الكلوية وتجمعها في اماكن متفرقة خارج الكبيبة وكذلك وجود نزف وتحطم في جدران الكبيبة والاوعية الدموية الموجودة ضمنها وتحطم واضح للقشرة الكلوية وعند معالجة الحيوانات المصابة بالمستخلص المائي لكلا النباتين لوحظ رجوع الشكل الطبيعي للكلية . اشارت نتائج الدارسة النسجية للبنكرياس حصول تغير في التركيب النسيجي للبنكرياس في حالة الاصابة بالسكري نتيجة الحقن بمادة الالوكسان تتمثل بوجود النزف الحاد في جميع مناطقها وحصول توسع وتحطم في الخلايا وعدم انتظام اشكالها وانحلال الانوية وخروجها من اماكنها الصحيحة ولكن عند معالجة الحيوانات المصابة بالمستخلص المائي لكلا النباتين لوحظ رجوع الشكل الطبيعي للبنكرياس.وقد سجلت النتائج جميعا بشكل عام تاثيرا افضل للمستخلص النباتي لبذور الليمون الحامض قياسا بدرنات السعد والدرنات افضل من العقار في تخفيض سكر الدم اضافة الى تحسين الاضطرابات الايضية المتسببة عن داء السكري المستحدث بعقار الالوكسان . | Diabetes Mellitus is a metabolic disorder characterized by hyperglycemia due to a defect in Insulin secretion from the pancreas, insulin action or both, with disturbances in (carbohydrates, lipid and protein) metabolic due to a defect in Insulin secretion, Insulin action or both. This disease is a serious and growing threat to the lives of many people , it isthe main problem which cause death to millions,The medical plants have important impact on human health as an important source of many medicines and medical products. The medical advantage of these plants lies in their ability to produce many of the characteristics that the pharmaceutical intervention have as a primary material or contributing factors in the pharmaceutical industry chemical compounds. The frequent use of herbs (medical plants) at the present time as alternative medicine, as came in this study.This study was conducted at the Faculty of Education /University of Kufa during the period from2/10/ 2014 to 30/5/ 2015. The study included the preparation of aqueous extractsofCitrus lemonseeds and Cyperus rotundus tuber. Also the study includedthe use ofaqueous extractsofCitrus lemon at concentration (500) mg/kg andCyperus rotundus at concentration (750) mg/kgineach dosageaccording to the body weight of the albino rats (Ratus ratus). The study includes (42) white malerats divided into seven groups with six rat in each group and they were injected according to their weight in the following way : the first group was orally dosed with physiological saline and it was considered as a control(negative), the second group was injected with alloxan (1ml.) and were considered as infected control group (positive). The third group were also dosed orally with decocted extract of citrus lemon seeds in (500mg/kg). The fourth group was dosed orally with decocted extract of Cyperus rotundus (750mg/kg) concentration. The fifth group was first hypodermically injected with alloxan and then orally dosed with decocted extract of citrus lemon seeds in (500mg/kg) concentration. The sixth group was first hypodermically injected with alloxan and then orally dosed with decocted extract of Cyperus rotundus (750mg/kg) concentration. The seventh group was first hypodermically injected with alloxan and then orally dosed with Glimepiride with (0.1) concentration. The dosing continued for 30 days.  A significant decrease (P< 0.05) was shown in total body weight and organ weight such as pancreas, liver and kidney in uninfected control(Negative) when compared with other groups : in the two groups that were treated with hot aqueous extract of Citrus lemon seeds ad Cyperusrotundus tuber respectively, also,the group was treated with Amyral and the group that injected with alloxan and that treated with hot aqueous extract of Citrus lemon seeds and Cyperusrotundus tuber, we alsofound a significant increase (P< 0.05) in the above criteria in the two groups that were injected by alloxan and treated by two extracts when compared with the positive control group.  A significant decrease (P< 0.05) was shown in the total WBC and RBC count , and the hemoglobin concentration platelets in uninfected control group when compared with other groups : in the two groups that were treated with hot aqueous extract of Citrus lemon seeds and Cyperusrotundus tuber, respectively, also the group was treat with Amyral and the group that were injected with alloxan and that which was treated with hot aqueous extracts of Citrus lemon seeds and Cyperusrotundus tuber, also a significant increase (P< 0.05) was shown in the above criteriain diabeticanimalsgroup compared with healthy control group, we also found a significant increase (P< 0.05) was shown in the two groups that were injected by alloxan and treated by two extracts when compared with positive control group.  A significant increase (P< 0.05) was clear in the levels of glucose , total cholesterol, triglyceride, low density lipoprotein , very low density lipoprotein and a significant decrease (P< 0.05) in high density lipoprotein in uninfected control group when compared with other groups : in the two groups that treated with hot aqueous extract of Citrus lemon seeds and Cyperusrotundus tuber, respectively.Also the group was treated with Amyral and the group that injected with alloxan and that treated with hot aqueous extract of Citrus lemon seeds ad Cyperusrotundus tuber, a significant decrease (P< 0.05) was clear in the above criteria and significant increasein high density lipoprotein in diabeticanimalsshown in the two groups that were injected by alloxan and treated by two extracts when compared with the positive control group.  A significant increase (P< 0.05) the effectiveness of hepatic enzymes(ALT , AST ,ALP, Bilirubin) in uninfected control group when compared with other groups : in the two groups that were treated with hot aqueous extract of Citrus lemon seeds and Cyperusrotundus tuber, respectively, also the group was treated with Amyral and the group that injected with alloxan and that treated with hot aqueous extract of Citrus lemon seeds and Cyperusrotundus tuber, also a significant decrease (P< 0.05) in the effectiveness of hepatic enzymes in diabeticanimals, a significant decrease (P< 0.05). The effectiveness of the above enzymes in the two groups that were injected by alloxan and treated by two extract when compared with the positive control group.  The presented histological study of the liver refers to the histological changes in the liver in the state of hyperglycemia that is represented by the expansion of sinusoid, blood accumulation, necrosis and bleeding in hepatocyte, presence of many inflammation areas, watery dropsically but when treating diabetic animals by aqueous extract of (Citrus lemon andCyperusrotundus), it wasnoted thatthey returned back to the normal shape of hepatocyte. The histological study of the kidneyrefers to the occurring of the histological changes in the kidney in the state of hyperglycemia that were represented by getting out the nucleus from glomerulous and aggregation in many area out theglomeruli, also, the bleeding or the destruction of glomerulous wall with blood vessels, the present distraction in kidney cortex but when treating diabetic animals with aqueous extract of (Citrus lemon and Cyperusrotundus), it was noted that it returned back to the normal shape of kidney. The histological study of the pancreasrefers to the occurring of the histological changes in infected diabetic animals by (alloxan) which represented an acute bleeding in all regions, destruction and expansion in kidney cells, abnormal shape, nucleus degenerative and leaving the true area but when treating diabetic animals with aqueous extract of (Citrus lemon and Cyperusrotundus), it was noted that it returned back to the normal shape ofpancreas.In conclusion, the results of this study indicate that the Citrus limonseeds and Cyperus rotundus tuberextracts gave good results, even better than the reference drug Amyral for loweringbloodsugar, in addition to improvingmetabolic disorderscaused byalloxan induced-diabetes

دراسة لتكوين الغشاء الحيوي لبكتريا Escherichia coli وProteus mirabilis المعزلة من اصابات المسالك البولية في محافظة النجف الاشرف Study of Biofilm formation of Escherichia coli and Proteus mirabilis isolated from urinary tract infection in AL - Najaf Al - Ashraf governorate

اسم المؤلف: رسل عيدان محسن
اسم المشرف: سهام جاسم محسن
الموضوع العام: علوم الحياة
السنة: 2015
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: النجف
الصفحات الاولى:
المستخلص: The aim of this study is to inferring the ability of biofilm production and virulence factors which has helped to form it into two types of bacteria P.mirabilis and E.coli. Two hundred and fifty samples have been collected from patients who are suffering Urinary tract infection (UTI) in Teaching Hospital at Al - Najaf Al - Ashraf during the period ( 1/10/2014 - 1/1/ 2015). The samples have has identified by diagnostic methods : culturing , microscopic , biochemical and using VITEK - 2 compact system more sensitively and specifically method.The results have been showed that the isolation ratio was 30 (37.5%) of E.coli, while P.mirabilis was 14(17.5%) also, a five isolates (6.5%) wereEnterobacter cloacae ssp cloacae and only two isolates (2.5%) were Raoultella ornithinolytica from the total number of specimens. The virulence factors and antibiotic sensitivity test of two bacteria : P.mirabilis and E.coli were determined and the more virulence and multidrug resistance were selected.The hemagglutination properties of P.mirabilis which isolated from clinical samples were determined , the reaction with red blood cells of human group O+ was explored. The ratio of Hemagglutination was reached 42.86%, 50%, 7.14% to MSHA, MRHA and NOHA respectively. However, E.coli has been a different results that was reached 30 % , 26.67% and 43.33% from type MSHA, MRHA and NOHA as well. On the other hand, the thin - film production (pellicle) has been formed by 13 isolates of bacteria P.mirabilis and 21 isolates of bacteria E.coli, when it was growth on the nutrient broth in a temperature 37˚C for 24 - 18 hours. Moreover, it has been shown that there is high affinity for adhesion with the epithelium cell in the urinary tract. In addition, the E.coli has proved the higher efficiency than P.mirabilis in adhesion. It was detected ability of bacteria to biofilm production in three methods. The bacteria E.coli have showed their ability on biofilm production where by the rate was (43.3, 52 and60)% on the different growth ways which was the Congo Red, the tube and the plate respectively.The gel electrophoresis has been done on all isolates which was to analyzed on adhesive factors genetically whereby the bacteria P.mirabilis, E.coli have shown ability to gene expression (fimH and afaB) with a rate of (42.86 and 28.57)% and (30 and 20)%, respectively.Also, it has been clarified that the antibiotics ( Ciprofloxacin, Amikacin and Ceftazidime) have an effect on the most virulent bacteria to prevent the formation of biofilm when it is taken a half of minimum inhibitory concentrations. It was found that the minimum inhibitory concentrations were the most efficient in the prevent a biofilm formation in both types of bacteria.It appears to be found that the minimum inhibitory concentrations of these antibiotics were the most efficient in the prevent the formation of biofilm in both types of bacteria. Ciprofloxacin has the high efficiency to prevent the biofilm formation in E.coli while this concentration has no effective on biofilm production from others. It has been found that there is a clear positive relationship between the presence of adhesion gene (fimH , afaB) and the ability to adhesion on the epithelial .The conjugation process was conducted successfully to transfer the adhesion genes between (E.coli and P.mirabilis) which have been considered a donor strains to transfer the genes to the standard strain E.coli HB101 which have been considered a receipt strains whereby have shown ability to adhesion and biofilm formation.

ليزر الدايود (970 نانوميتر) في كشف الزرعة السنية في المرحلة الثانية مقارنة مع الطريقة الجراحية التقليدية في الجسم الحي 970 nm Diode Laser In Second Stage Dental Implant Exposure Comparative Study With Conventional Surgical Method .In vivo Study

اسم المؤلف: سلا علي حمدي
اسم المشرف: حسين علي جواد
الموضوع العام: علوم الليزر
السنة: 2015
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد زراعة الاسنان التطور الاكبر لطب الاسنان اذ انها تعالج فقدان الاسنان دون التاثيرعلى الاسنان الموجودة لتعويض السن المفقود.تقسم عملية الزرع بشكل عام الى مرحلتين : المرحلة الاولى هي العملية التي يتم فيهاغرس الزرعة السنية داخل عظم الفك وتركها مطمورة تحت اللثة لمدة 3 - 6 اشهر لحين اكتمال التحام العظم بالزرعة والمرحلة الثانية وتشمل كشف الزرعة المطمورة وازالة نسيج اللثة جراحيا .الاهداف تقييم كفاءة القطع الجراحي للدايود ليزر ذو الطول الموجي 970نانوميتر ومقارنته مع القطع الجراحي التقليدي باستخدام الشفرة في عملية كشف الزراعة السنية اثناء المرحلة الثانية من عملية الزراعة من خلال كمية المخدر الموضعي المطلوبة ,وقف النزيف,الوقت المستغرق لاجراء العملية ,الم ما بعد الجراحة واخيرا الوقت المناسب لاخذ الطبعة من اجل اكمال الخطوات المختبرية لصناعة الاسنان المفقودة. اجريت هذه الدراسة في قسم زراعة الاسنان /مركزالعلوية التخصصي لطب الاسنان للفترة من كانون الاول للعام 2013 لغاية تشرين الاول 2014 ، 50 مريض يحتاجون الى كشف الزرعة المطمورة قسموا الى مجموعتين المجموعة الاولى والتي تىشمل 24مريض تم استخدام الشفرة الجراحية رقم15والمخدر الموضعي تقنية التسرب والمجموعة الثانية المتكونة من26 مريض تم كشف الزرعة باستخدام ليزر الدايود (سيرو ليزر ادفانس,سرونا ,المانيا) وبقوة مقدارها 3واط في الوضع المستمر وبتماس مع نهاية الفايبر قياس320مايكروميتروالمخدر الموضوع بتقنية البخ.كفاءة الليزر كانت عالية في قطع نسيج اللثة وبالمقارنة بين المجموعتين كان هناك فرق معنوي احصائي عالي في كمية المخدر الموضعي المطلوبة وطريقة التخدير ,متوسط الزمن المستغرق لاجراء العملية بين المجموعتين, الالم ما بعد العملية واخيرا الوقت المناسب لاخذ الطبعة لصالح مجموعة الليزر.استخدام 970 نانوميتر وبقوة 3واط دايود ليزر في كشف الزرعة المطمورة له فوائد عديدةمنها عدم الحاجة لاستخدام التخدير بتقنية التسرب,راحة الطبيب والمرض في ان واحد من حيث الوقت المستغرق وسهولة التطبيق وعدم شعور المريض بالالم وامكانية اخذ الطبعة في وقت مبكر حيث يمكن ان يتم ذلك بعد عملية الليزر مباشرة . | Following the placement of a dental implant and its integration into the osseous substrate, the current method of treatment is to surgically uncover the implant, wait for the tissue to heal, and then proceed with impressions and fabrication of the restoration. The second - stage surgery of submerged implants can be performed with a scalpel or by laser . This prospective study was designed to assess dental implant uncovering by 970 nm diode laser and to compare its performance with traditional cold scalpel surgery. Fifty patients with a completely osseointegrated implants participated in this study. Patients were divided into two groups. For the study group, second - stage implant surgery was done with a 970 nm diode laser in a 3W power . For the control group, the implants were exposed with a surgical blade. Certain parameters were used for evaluation of the two techniques. The use of the diode laser reduce the need for injected local anesthesia; there was a significant difference between the two groups regarding the need for anesthesia , duration of surgery, postoperative pain, time for healing and taking the impression(P < 0.001). The 970 nm with 3W diode laser can be used effectively for second - stage implant surgery, providing both the dentist and the patient with additional advantages over the conventional methods used for implant exposure .Laser cuts tissue precisely without infiltrative anesthesia and with excellent homeostasis . Because of lower amount of tissue destruction with the laser surgery the gingival contours seem tobe stable after laser implant recovery procedure . impressions can be madeimmediately and assuredly with no change in the emergenceprofile by any tissue shrinkage or recession.

التوليد والسيطرة على التشويش في اتصالات التردد الراديوي - البصري Chaos Generation and Control in RF - Optical Communications System

اسم المؤلف: اسراء علي ياسين
اسم المشرف: قيس عبد الستار النعيمي
الموضوع العام: علوم الليزر
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تتناول هذه الاطروحة تنفيذ وتقصي موضوع الاتصالات الضوئية الفوضوية .ونظرا لمتطلبات السرية العالية، تستخدم الاتصالات الضوئية الفوضوية لتشفير الرسائل بين وحدات الارسال والاستقبال.ان الطريقة التي استخدمت للحث على السلوك الفوضوي هي طريقة التغذية المرتدة الضوئي - الالكتروني باستخدام جهاز من محاسن هذا المضمن هو عرض النطاق الترددي ودرجة التعقيد العالية. استند عمل النظام الى طريقة التغذية المرتدة. في هذا النظام، يكون جهاز مذبذب وحدة الارسال مسار مغلق بينما يكون جهاز الاستلام مسار مفتوح يستلم اشارة الفوضى من وحدة الارسال عبر وصلة الالياف الضوئية. تم البحث عمليا في طريقتين لتشفير الرسائل الى اشارة الفوضى. ان هاتين الطريقتين هما التعديل المشوش والتنكر المشوش. لقد بدانا من اختراع نظام الفوضى ودراسة خصائصه وتحديد عناصر السيطرة التي تؤدي الى حالات مختلفة من سلوك النظام. وهكذا تم تقصي الطريق الى الفوضى في مذبذب جهاز الارسال. ولملاحظة سلوك النظام، تم تحديد الرسم المتشعب من خلال تغيير العنصر المتحكم. ان عنصر التحكم هو القدرة البصرية الخارجة من الثنائي الليزري . وجرى بحث التسلسل الزمني وطاقة الطيف واعادة تكوين مساحة الطور. وقد تم بحث موضوع تزامن كلا الطريقتين. وتم الحصول على الرسالة المرسلة في وحدة الارسال من خلال تزامن المذبذب في وحداتي الارسال والاستقبال. وهكذا تم الحصول على الرسالة المستخرجة عند وحدة الاستلام. ان عرض النطاق الترددي لاشارة الفوضى الحاملة هو 200 ميكاهيرتز. وتكون قيمة القدرة الضوئية الخارجة من ثنائي اليزر والذي هو العامل المتحكم في نظامنا هذا في كسب الطوق المرتد في مذبذب الارسال بين (0.8 - 0.9) ملي واط. الرسالة كانت عبارة عن تردد راديوي 100 ميكا هيرتز وقدرة 0 ملي ديسبل. | In this thesis, the chaotic optical communication is implemented and investigated experimentally. Due to the high security requirements, chaotic optical communication is used to encrypt the message between the transmitter and the receiver units. The method which is used to induce chaotic behavior is electro - optical feedback loop by using a Mach - Zehnder modulator. The advantage for this modulator is a high bandwidth and high complexity. The system is a unidirectional feedback loop. In the scheme of unidirectional, the oscillator of the transmitter unit is a closed loop while the oscillator of the receiver unit is an open loop that receives the chaotic signal from the transmitter via an optical fiber link. Two setups were investigated experimentally to encrypt the message to the chaotic carrier signal. These methods are chaos modulation and chaos masking. We have started from creation the chaotic dynamics studied its properties and determined the control parameters that lead to various situations of the behavior of the system. The rout to the chaos for the transmitter oscillator has been investigated. To observe behavior of the system through changing of the control parameter, the bifurcation diagram is plotted. The control parameter is the output optical power of the laser diode. Time series and power spectrum of the time series is extracted by using Fast Fourier Transform FFT. The phase space reconstruction has been examined. The synchronization of two setups has been investigated. The sent message is extracted by the oscillators synchronization in the transmitter unit and the receiver unit. The extracted message has been obtained at the receiver unit. The bandwidth of the chaotic signal is about 200 MHz. The output optical power of the laser diode which is the variable control parameter of our setup in the feedback loop gain of the transmitter oscillator is between (0.8 - 0.9) mW.The message is a radio frequency at 100 MHz with power 0 dBm and is attenuated below this level with the noise level when modulated with the chaotic carrier.

فكرة الحكومة العالمية وتطورات النظام السياسي الدولي Concept Of The World Government And International political System Developments

اسم المؤلف: يسرى كريم محسن العلاق
اسم المشرف: يسرى كريم محسن العلاق
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: he idea or hope of achieving a World Government wasconsidered amongst Philosophers and Advocates of world peace. Beginnings of the concept were found back in global philosophies and religions, where origins for globalism and unity of human race and natural law, formed its first intellectual approach.The idea of a world government was associated with the International Political System, since the Treaty of Westphalia In 1648, Where the Global Government was considered as an alternative to the International Political System, where through it there will be an end to conflict and perpetual war in the international system, As means and procedures that were produced by the international system proved to fail in achieving peace.Although the need for a world government in achieving world peace, establishing justice, And confront oppression and injustice sounds totally logical as a concept, but practically it was found to contradict with the international system On ground; setting the idea in the frame of an unrealistic approach or a kind of Utopia. In other words, conditions were far from favorable for its establishment. On the contrary, centralized nation - states in the international system, its absolute sovereignty, national divisions, and ideological conflicts, As well as the will of major powers to Control and dominate the international system, and seeking self - Interests by looting the world's wealth, controlling vital resources, and absence of peoples' role in international politics. All of these fac tors were considered main reasons preventing the establishment of the world government.The end of the Cold War revealed a major transformation in International Political System, where a set of political, economic, technological and cultural variables have led to a change in the nature of the International Political System. The world has become integrated as a result of the immense technological developments, growing economic globalization, decline of ideological conflict, increasing costs of military forces, As well as the decline in the authorities and functions of the state to manage some sectors at thenational and international levels, for the benefit of the growing roles and functions of other actors in global politics. Alongside the emergence of new global challenges and threats that not only endanger states but humanity as whole.According to what was aforementioned, a necessity for a high global management to deal with global issues and respond to global threats was in urgent need. In other words, what the global system is witnessing of major evolutions and drastic changes, require the establishment of a higher Global Authority or Authorities

اثر البنية الاقتصادية في الثقافة السياسية في العراق بعد عام 2003 Effecting of Economic Structure on Political Culture in Iraq after 2003

اسم المؤلف: احمد حسين والي البدري
اسم المشرف: هشام حكمت عبد الستار العزاوي
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The present research includes two main comparisons as to take in and assimilate the Iraqi Society in respect to the political culture of economy reality having effect on the culture structure. The latter is a mixture of text , thought and history. Hence , the meaning of Iraqi culture structure expresses about its self in escalating activities ,alienation disorders , and religious or social( worthy things non violations ). The current study indicates the structure of the Iraqi intellectuality and state of that economic structure and activities ensued from it and not the political culture.In every society there would be discrepancy between non - reality and reality; this discrepancy requires to be interpreted and explained for the individuals of the society having the same social symmetry. From hence , it could notice that the Iraqi society suffers from the following : - Attractively in the subject of the economics : it is the existence of huge and diverse resources ,including strategy ( oil and gas ) , human capabilities and others , these resources live pace by pace with its contradictories as poverty , undeveloped economics , infrastructure and culture structure deforming . These phenomena indicate defects that should be scientifically processed , in the way that it could not logically say that there huge wealth sources beside poverty and unemployment ( violence and corruption). - In reality , the depth of democracy could not be achieved unless there should be equity among the citizens; besides, it requires all energy of personal efforts as to get a suitable living state . The economic and social power should be restricted only to elite having known by its production and capability as to get Iraq out of its present state to the right path. - The problem of Iraq is the structure problem where economic, social, cultural and political 's viewpoint should be valuably sought for. The weakness of political culture and its traditions related to its unity that expresses about the history of the state , political system and economic and social development.

وضع الاقليات في الدولة الفيدرالية - ستراتيجيات التعامل وسياسة الاحتواء : دراسة مقارنة بين العراق والهند The Situation of minorities in the federal state : Coping Strategies and Policies of Containment a Comparative Study between Iraq and India

اسم المؤلف: علي جاسم عبد علي عبد الله
اسم المشرف: عامر حسن فياض
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Those human groups that distinguish it from other citizens were not, have achieved a stable unrivaled referred to Mendez until they have suffered a lot of injustice and oppression, which is still suffering, even in some of the systems developed democracy, that these are distinct from the rest of the community groups dubbed minorities name and that and according to specific criteria applies these groups is consistent with the nature of the name, and it was the closest and most common is the standard numerical these groups, was launched researchers and specialists from several criteria to be called and the possibility of compatibility with the political systems in the countries in which they live and are considered citizens, since citizenship is the rights and duties , he must enjoy those groups full rights and a commitment to full duties, similar to the rest of the citizens of the state, but these rights and duties may encounter complexity depending on the nature of the political system and the extent of the enjoyment of democratic values. In systems where the central state is very strong almost disappear those privacy or even sometimes disappear , whether it be due to deliberate or extreme centralization by which leave no room for such groups to exercise self - rights, such as the use of language and the way of education and practice their own culture which is characterized by which keeps its part to revive that culture and conservation, therefore, we find that minorities in the central states can not full rights to enjoy, but the only commitment to their duties, which in this case has violated one of the pillars of citizenship, namely the rights, and remained live only on the second corner.In spite of the fact that a variety of Federal Regulations (Union treaty and the Union of personal Federation and the Federation of actual, and the confederation), the best one and the most coherent is the Federal Union, which is one of the more regulations efficacy in the management of the issue of minorities, but most effective, the state here with one political system and one flag and the policy of extra - one, but the terms of reference which are distributed between the capital and the so - called (center) and the regions or provinces by the Constitutional labels for the Constitution of the Federal State, and usually happens to these countries or States are gathering a result of a constant threat to its existence in the case of survival of individual, or the presence of common factors between population, which prompts them to integrate in one state while retaining some of its terms of reference and this is according to the nature upbringing in which they arise federal state, The way growing up control of the capture of the powers broader and be specific powers, the federation as a solution to countries in which the plurality of linguistic minorities exist, ethnic or religious, can through the way the administration which is characterized by granting powers to manage own affairs similar to what is in being an independent state, there is a constitution and the authority of the legislative and executive authority private regional as well as judicial, and assume that the management areas Affairs authorities in line with the aspirations of the citizens of those regions and who are, in turn, the citizens of the State of the Union as a whole, but this organization and this administration is not absolute and not subject to the decisions of the center fully and absolutely, they first must take into account the age of the laws and legislation, the Federal Constitution, which is the cornerstone in this union the main pillar in it, as well as to not be the of those Territories mostly authority in the field of relations Foreign conclude agreements or enter into treaties as the continued federal State province, but the important thing here is that this system gives broad powers in the management of private affairs of the citizens of the province and who are often distinct from the rest of the citizens of the state, either linguistically or religiously or ethnically ... etc. of distinctions human, as well as allowing those regions the possibility to participate in political decision - making at the federal level, any internal autonomy in the management of private affairs, as well as participation in the central authority in the management of public affairs, any participation in the two levels of government, federal level Federal and level the other the regional level, Here you find minorities match in achieving stability and administration to its affairs that can not be obtained in other systems, it is worth mentioning the federal could go back Soaking up the majority in that State, The vast could have divided themselves on a geographical basis for the enjoyment of the powers granted in the Federal Constitution.In this federal place systems to become the world's safest communities unique, as it is through the powers it recognizes mainly the existence of discrimination within the geographical boundaries of that State, and also through his powers can these groups to exercise their culture and use their own language and legislation of laws fits (harmonious condition with the Constitution), and also Through its powers are both pillars of the pillars have achieved citizenship (rights and duties), so the sense of citizen full rights and sense not to threaten the group to which he belongs, as well as his sense of caution state parent so to speak, as a state sponsor of his presence and keep it, so his response positive and trying to bring himself second pillar of citizenship, namely the duties that fall upon himself, the state federalism, if what has been applying its own rules correctly, it keeps its unity and integration within distinct communities, saved breed has a desire to perform basic duties, and culture of others is prohibited and the recognition of uniqueness, generate the desire to stay and integration in that State, however, to predict human destiny remains under different systems of the imagination, the final We are studying and dealing with human hearts which is to change the earliest of stability, states and even the federal ones seen some internal vibrations which generated violence that left hundreds but thousands of the dead, but of course, the federal system is the most flexible in absorbing these vibrations and over her response to them.And it is through the foregoing are seeking through this research is to reveal the power of the federal systems in the containment and to deal with these groups and the possibility of maintaining the entity external unified state divided constitutionally internally, and also touched on the strengths and weaknesses in those systems and which could lead to a demand for secession or destabilize threat to internal stability and security of the state.It seeks this research is to clarify the concept, characteristics and models of the federal state, and the extent of the success of countries that adopted and what are the strengths and weaknesses, and go into the details of these points necessitated a theoretical framework to explain the reasons behind the adoption of some States federal model.the importance of studyingMinorities have become since for quite some time, one of the reasons for the spread of the phenomenon of instability, another reason for the intervention of foreign countries in the affairs of the countries where minorities live, and those countries Iraq, and the problem of minorities in Iraq problem back to the genesis of the Iraqi state, and that is the capacity of the subject and the possibility of stand on the achievements of this model in the management of the issue of minorities, we had to search in the federal which absorbed more different communities and differentiated, namely India and of pluralism, linguistic, religious and ethnic, and the possibility of description of these solutions to the case of Iraq and take advantage of how to survive one country for more than seven decades with all What content of pluralism and differences, and whether that Iraq, after less than two decades, could be his rein in Kurdish minority of separation, through integration into a federal state, but it remains to be said here to the actual application of this system and how growing up, this system has met success and acclaim in the States, and troublesome in other countries, including reflected recently on the level of acceptance or rejection of the idea of federalism in modern by the two countries, and therefore we dealt with this subject in detail together with the Indian model and compare it to Iraq, with the difficulty of comparison in terms of the size of the state and the nature of the population linguistic and religious and ethnic differences, but the foundation is how to manage diversity In the federal state.The study hypothesisOff thesis from the premise that, that minorities if they have been dealt with according to respect its presence and recognition, they will be a factor of stability and not a threat factor, and here the hypothesis started from the fact that the best systems for the management of internal diversity is the federal regulations, they provided the flexibility and capacity for absorption through and means available, to contain and to deal with these groups, policy, and who are, in turn, citizens where, here the basis of stability in the multi - religious countries and languages due to the federal system, which contained in those states internal differences, but this model is applied in a country without the benefit of Past experience in the federal rule, that makes this state is weak in the face of problems that may arise in the future, which makes these groups demand the right to secede from the body of the state, and thus its weakness and inability to remedy the other detachable demands, and it Federalism has the ability to full body politic to keep State if applied properly by the parties to form government (federal and regional).

اسرائيل والتحولات السياسية في البلدان العربية منذ عام 2010 Israel and political transformation in the Arabic since 2010 countries

اسم المؤلف: سلمان علي حسين العزي
اسم المشرف: صالح عباس الطائي
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In this study titled (Israel and political transformations in the Arabic countries since 2010). We try to explain the eminent abilities and components which Israel has, especially the military affairs .It has a good strong developed one based on developed military industries of novel technology, all worked to arm the military army with most new weapon like nuclear weapon, in which the big military spending has a good role of that. In addition to that the economical abilities which came from Jewish donors, nonstop American support and German compensation, all these have a good role in building developed Israel commerce. Israel employed the Jewish experiences which had come from emigration to develop its economy, one of that is a big development of economical level in the country. In addition to that the technological abilities which have an eminent role to support the international and region Israel aims e.g. the fields of military industries and space fields like launching a grope of satellites for spying and collecting information . All of that make an obstacle against the international and region alliance of Israel to do its aims. Part of these eminent obstructions are social and inner political problems e.g. west and east Jews problems ,or disagreement between parties about main affairs like making of the constitution and who is the Jew ? In addition to that the economic problems e.g. lacking of row materials, oil ,Gas ,and lacking of water .Another important points are the need of near shops to sell their productions ,and no good strategic view as it is on a small land and surrounding with enemies . After that we go to search for the international and region effected points of Israel through searching the region effected points of Israel, one of them is turkey, Ethiopia, South of Sudan and middle of Asia, also what these points gave to Israel especially after the political changes in the Arabic countries in order to do its plans in Arabic area. Also we show the international points of Israel activity. U.S.A, European Union, Russian and china will be the first .This depends on a fundamental thinking of Israel idea as in depending on the great power in its international and region alliance. Another search, we go for the motives, the ways and the results of the Arabic political changes and its effects on the Arabic political reality then the Israel role in all of that depending on the central Arabic countries, e.g. Egypt Syria, in addition to another countries like Tunisia, Libya and Yemen. The role of Israel in the Arabic political changes depends on the continuity of demonstrations and unstable case in the Arabic countries, leading to the prepared aim of Israel for the Arabic countries .This leads us to search in the Israel American projects ,one of them is the Great middle East project and the strategy of its implementing through the creative confusion ,and the project of smashing Arabic countries depending on Bernard Luis and Audead Yunoon like dividing the Arabic countries to small unstable one ,and quarrel with each other, trying to put future possibilities for the nature of the relationship between Israel and Arab through three possibilities like the continuity of the relationship as it is or change it ,or both continued and changed one depends on each case

العلاقات الامريكية الصينية بعد الحرب الباردة وابعادها السياسية والاقتصادية The America - China relations after cold war , and its political , economic dimensions

اسم المؤلف: زينب عبد الله منكاش
اسم المشرف: رفاه شهاب احمد الحمداني
الموضوع العام: العلوم السياسية
السنة: 2015
الموضوع الدقيق: العلوم السياسية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: A new data have appeared in the post - cold war age began features running through the erosion of the western strategic coalition elements with the collapse of the Soviet Union and the decline justifications western coalition in the face of the communist threat ,and the emergence of international competition indications strategy including economic and regional interests to form a so centers international political and economic influence. The relations - China relations is today one of the most international relations complicated in the international system. Both countries are located under the impact of new international data environment after the cold war, as well as that each is trying to show the embodiment of the elements of power, which is owned by another, as the United States of America is seeking to devote unipolar system by having an abortion all attempts by some emerging international powers to interpret the new international system form, while China is seeking to return ,and change this system.Therefore, this study aimed to analyze the economic and political relations between the United States , and China through its review of the elements of which plan the path of those relationships and to monitor compliance and repulsion between the two cases in the post - cold war age , and the development of future indicators of these relations imposed by the nature of the international system and international environment, the existing economic relations, which between them.This study has gone to emphasize the need for clear structure helps to organize and coordinate the study according academy of problematic from which scientific hypothesis that went to prove in order to reach the desired formulation of scientific results. In light of this has been divided this thesis into five chapters, as well as the introduction and conclusion, and in light of this division thesis into five chapters, as well as the introduction and conclusion has been through the review of intellectual perspectives U.S.A. - China's relations post - cold war by having the international system attributes after the cold war and the role of the realist school system and the balance of power and coalition in the study of international relations and the impact on U.S.A. - Chinese relations ,and determine the nature of this relationship the U.S.A - Chinese and vision of those relationships, as well as the most important factors affecting them and the reality of the U.S.A. and Chinese cognition to the reality of these relations There is review of the elements of economic and political power of China and the U.S.A., and the areas of cooperation and coordination between the two countries in the field of trade and investment, energy and foreign debt. Economic, political ,and social determinants of U.S.A. - China relations, and finally had been reached that The expected future framework of U.S.A. - China relations is located within a combination between the rival and partner of the United States ,but not as a strategic partner to the inability of China's access to the international standing of the United States. Therefore, in the interest of China that offers all the ingredients that induce the United States to take its international partner in the future.

المتغير الحضاري والامن الدولي (جدلية العلاقة) The Civilizational Variable and International Security “Dialectical Relaioship

اسم المؤلف: رشا يحيى عبيس هاني
اسم المشرف: قحطان كاظم محمد الخفاجي
الموضوع العام: العلوم السياسية
السنة: 2015
الموضوع الدقيق: العلوم السياسية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: It can be said that the search in the manifestations of contemporary international politics with the feasibility of the scientific and practical point of view at the same time together, by virtue of the world that today's world can not be synaptic States if Maoradt development and progress can live isolated encrusted on itself.This thesis has tried to answer a series of questions revolves around its axis Perhaps Atralamngar civilization and the extent of influence on international security.The study examined carefully to Othertasara events on the cultural variable and effervescence of his face and the nature of its relationship to international security on the other.Given that the aim of the thesis is to highlight the dialectical relationship between international security and the changing culturalAnd depending on what it contained treatise of chapters and sections and demands, it concluded a number of results can be summarized the following : An change is a comprehensive process of formats, jobs and social relations, both personal and international levels, a process Mtaataddh and dimensions. The importance of the change in international politics lies in the control change and Tgeyemcn say that research in contemporary international politics phenomena with the feasibility of the scientific and practical point of view at the same time together, by virtue of that the world is today's world Synaptic can not countries if Maoradt development and progress can live isolated encrusted on itself. An political change is being General, lasting and comprehensive multi - dimensional phenomenon and parties, complicated and complex to a very large and infinite extent and impartial and last but not least, the phenomenon of time depends on the time as the decisive factor in the change.3_an There are several theories as to why the process of change. There are those who view the process of change as an evolutionary process, whether in writing or taken form circular. Ually this basis, international Mralamn changes were sensible developments and changes are sometimes spontaneously as a result of increased international interactions and taken a certain form on the level of international political summit pyramid.UN Security. An not and will not settle on one format, but will take Mtaatadh forms depending on the objective and subjective conditions as well as security developments in the case, which began significantly affected Pmaihdt in the international environment An There are many forces of change, and perhaps the most important international structure which serves as the director of the forces of change driving direction formed - aa structural Atah - then back again, according to the curriculum analytical systemic way nutrition retrospective feed back to be input and the forces of change is pushing for the events of a particular form of the phenomena of out. That the change in the presence of the enemy and the disagreement will affect the UN Security adjust the process in all its dimensions, because the strategies and tactics that will be followed by the actors in the international scene will change depending on either deems appropriate to achieve its security. Cultural variable that takes two principal forms to influence the UN Security Council. It entrance Adtraba security and orderly entrance. There are more than approach the entrance and reflecting the impact of the changing cultural kuna Adtraba or organized international security. It could be argued that the global entrance and entrance regional basis in those two entrances and can not be rigid separation between them, but that one is complementary to the other are provided one over the other depending on the international situation prevailing in this era or that. We are studying the impact of the elements of civilization at the international security and how to have an impact on the nature of the composition of the communities where we find it is not possible that any civilization without it have the ingredients to be based upon the basis of its existence. We find that the social and historical denominated find that Almojtkaaat is the foundation upon which civilization and therefore even international security is mainly based on the groups of people and achieve their security So is this ingredient essential to the relationship between the parties 12. As for the material and technical chiropractor, we find that civilization can not be exist without that there will be the basis of material and technique based upon where that human evolution and its dependence on the machine and industrial development and Altjaramanm in the creation of civilization and the impact on international security. Also denominated as the environmental and natural climatic conditions Almaatihomaihdt of changes in the environment are Bmjmlhatather civilization and thus receive Bdilalha on the UN Security In addition to the intellectual and cultural rectifier which is one of the important ingredients in building and basic civilization and thus became the main influences on the UN Security Council. The UN Security depends on the relationship of interaction and Altoaagaf, meaning that the behavior of any of the units of the international system affects the nature Allamn and that these same civilizations countries are influential on the UN Security 16 - that the variable civilization possible to be Adtrabaa international security through the influence of the UN Security and possible to be a element Sraia Baltla and poses a security obsession States Emergence of extremist movements that have become a danger to international security Associated with these movements cultural backgrounds where we see the emergence of radical Islam or fundamentalist tide, which has become a threat to international security and thus there became obsessed with the fear of these Aharklt, which has become an influential heavily on the UN Security imbalance. Struggle for the interests and values which has also become a cultural worker hired to threaten international security.Civilization variable also takes the other hand, being an entrepreneur, a side entrance to international security, not only Adtraba.The ivilizational variable because it possesses the humanitarian missions and humanitarian tasks that could be a factor organized international security and Thakqiq kind of stability. Well that the variable civilization based on scientific and technological progress and the emergence of this progress would work in an orderly fashion to international security. On the other hand became orientations to the need for there to be an international approach to address these movements and work to maintain the stability of the UN Security There has become an international conviction dangers of sectarian and religious conflicts, the urgent need to style or the way to face them in order to maintain international security. Expected to see a significant international structural change and that there will be a new kind of pluralism, but this time be pluralistic participation of any US - led pluralism. And this would be reflected on the future of the UN Security. Confirm that the next and imminent danger to humanity is not the spread of nuclear capabilities as far as what is the proliferation of conflicts and their development, which would be very dangerous if based on a nuclear technology that could be used in a changing world.Where we find the emergence of two types of convergence or alliance of civilizations Altair on the UN Security played a role in Altat. They are : The first approach : Alliance Alammeraki_alurbi_alasiraiala and trying to draw international security that you see fit according to the National Aamnha and therefore varies with each of its vision is threatening international peace and security andThe second is the Chinese approach Islamist alliance - Russian - which constituents of the LES also draw peace and security in accordance with that you see fit.And here we find that this Athalv to take two aspects : - The first is entrenched civilizations in order to face what might urge her and thus affect the UN SecurityThe second is cooperation, or balance among civilizations in order to ensure that the UN Security settledAnd therefore, the future of the cultural variable and its relationship to the international security of : - Either variable decline of civilization and remains active but highlights the other elements of a political, economic and technological impact involved in the UN SecurityAwalamn International is the one who becomes a civilized intellectual Bdalalath variable factors becomes security measures, but not just semantics patterns and be the basis for international security and affect it.And it has to the changing cultural and International Security always in the dialectic of the relationship and that one Aathelr is affected by the other

مكانة ايران الاقليمية في الاستراتيجية الامريكية بعد عام 2003 Iran's Regional Status in the U.S Strategy After 2003

اسم المؤلف: احمد عبد الكاظم موسى
اسم المشرف: محمد كريم كاظم
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

الاستراتيجية الشاملة للولايات المتحدة الامريكية ومستقبل التوازنات الجيواستراتيجية العالمية

الموضوع العام: العلوم السياسية
السنة: 2015
الموضوع الدقيق: الدراسات الاستراتيجية
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • العلاقات التركية الاوربية
  • العلاقات التركية
  • الامريكية
  • تركيا والاستراتيجية الامريكية
  • الدور التركي في الاستراتيجية الامريكية
  • المنظور التركي للعلاقات مع الولايات المتحدة الامريكية
  • صنع القرار الخارجي التركي
  • دور المؤسسات الرسمية وغير الرسمية في عملية
الصفحات الاولى:
المستخلص: Through the study of "the comprehensive strategy of the United States and the future of the global geostrategic balances" it becomes clear that the rapid developments and changes in the global environment are redefining the global geostrategic balances, with the dawn of the twenty - first century many indicators and variables that indicate the movement of global balances on the verge of moving into a new phase have accumulated to confirm the decline of the United States ability to control the direction the movement of balances individually, Although it is still the strongest but no longer the only party in the balance, Since the emergence of the world's major powers having the capacity, the will and active performance as well as and prowess to face or reduce the American capacity to control the movement of the soft power by means of balance and peaceful ascent or the so - called "fine balance" and to abide by the rules of international law and not to resort to military force in international crisis management and processing the objectives and interests depending on the basis of partnership, the United States looks forward with growing concern to the shrinking margin over military and economic capabilities compared to those of China and Russia and a range of powers Described as emerging, including India and Brazil, which will accelerate the end of the era of the so - called American Empire is progressing chronologically and with amazing speed, with global powers being able to join forces with geopolitical and geo - economic partnership frameworks as well as the military to stop the expanion of U S hegemony on the world.The international system has seen structural shifts made him go away slowly on the imbalances that were dominant in the international hierarchy since the end of the cold war, coincided with the relative decline of the economic strengths for most Western capitalist countries and especially the United States, as a result of the economic and financial crisis that began in 2008, global powers rising in Asia and Latin America continued to achieve high rates of economic growth despite the nature of the interdependence of the world economy, promoting the growing economic power inevitably strengthens the strategic power of the forces balancing with the United States, both with regard to the implementation of development plans drawn or military budgets or strategic capacities make it an active actor having formulating will in the future of the World geostrategic balances. Thus the polarization of international forces is moving towards the formation of groupings and international strategic partnerships between influential world powers active in regional and international policies, and in the geopolitical, economic, military, and technological areas, depending on their material and moral potential, as well as elements of the external environment and providing an incentive for future influential roles in the future of the global balances movements.The United States recognizes that the transition strategy is great, and it should adapt to the developments of the global system, witnessing the rise of new forces which have the power and ability to build partnerships and organizations with strong influence over some nation States, despite the fact that the United States is the largest military force in the world, we found it stumble in its wars of expansion, and the economy weakens more and more because of the stiff competition faced by the economies of other emerging powers And, if the U.S adapts to those changes, with better cooperation with world powers, we will see a smooth and peaceful transition to a pluralistic system and geo - strategic balances evenly without disasters and wars, the United States will become an important actor beside the other world powers.And by analyzing the extensive strategy of the United States and that of the world powers towards issues, crises and areas of influence dealt with by these forces, and knowing the main variables that affect the international environment, several conclusions were reached as follows : -  There is a relationship of mutual influence between the nature of the international system, its structure and its mechanisms and the existing global geostrategic balances, in the unipolar system in the case of imbalance the balances are under the control of a single pole and its allied forces, that Pole dominates on the interactions and strategies of its rival powers and deter them. Under the bipolar system the established geostrategic balances are closer to relative parity between the poles or the two blocs and often their relationship are with conflicting strategies rather than cooperative ones, which pushes the movement for change in balances more quickly. In the multi - polar system world balances are based on three or more poles, which makes them more stable. Geo - balances in That its more cooperative and partnership strategies that to compete and conflict and move towards a complementary relationship finding mechanisms to ensure the interests and objectives of all States and prohibit overtaking them. all strategic variables affect the change of states power positively or negatively, and accordingly, the global geostrategic balance change occurs, the State which possesses mechanisms to control and manipulate those variables, enable it to achieve the greatest impact in the movement of balances for achieving its objectives, this was evident in the achievements and performance of the extensive American strategy after World War II, and then after the collapse of the Soviet Union enabled by mechanisms of the capitalist system as well as its capabilities and potentials, employing events and strategic variables, To achieve strategic balance with the Soviet Union and continued superiority or maintaining control over balances after its collapse through the use of the soft power and hard or smart power that enabled it to achieve many of the benefits of preventing the emergence of rivals and winning the support of the largest possible number of States to its side, to control the movement of geostrategic balances for achieving its goals and its national security.  with the dawn of the twenty - first century the U.S strategic performance is witnessing change and decline in its influence and interests, at the level of the Middle East after the destruction and occupation of Iraq and supporting Arabic movements change, and perpetuating crises as the Syrian crisis, the United States withdrew from direct interaction settings depending on the strategy of driving from the back and giving active roles for regional and international powers it had put them in a list of enemies and rivals such as Iran, Russia and China, Which is reflected on their active roles to approach new areas of influence. After a series of U.S political and military failures, in Afghanistan and Iraq, and the global economic crisis and deflation and recession in the United States and Europe it, began looking for new alternatives to lead the world in a more stable and secure, less unique and unilateral domination, So some great powers found that it can influence worldwide reactions, and the participation of the United States to let the world stand on solid substrates, to become more balanced and stable. the emergence of global forces with strategies backed by strategic performance aimed at ending U.S. geostrategic balances Singularity in the world, especially in the areas of influence of the strong competition for the United States. In this chaos and the American decline globally, Russia and China have found their chance in pushing balances movement through the Syrian crisis especially as the Arab countries witness the Arab spring setbacks and uncertain future, Russia and China have also found that the EU suffers from economic crises hitting its members, and the United States is not better than the EU it is preoccupied with finding new opportunities to revive its collapsed economy, while Russia and China lead a role that rejects any American trends both toward Syria or Iran and Ukraine, As well as the rest of the spheres of influence which threaten national and energy security. the geostrategic balance theory derive from the basic assumption that, if States are not associated with each other in lasting relationships, but in the case of constant change driven by considerations of power, and seeking to increase investment of their capacity. components and reorganizing their relationships and the quality of their interactions to achieve balance with the United States. On that basis, China turned to a new strategy, which seeks to restore its former influence, through the initiative of the new Silk Road project, which integrates with waking up Russia and the presentations of dissertations Uras union integrated. with India's wishes, looking for new maps, here, the new formations and clusters, such as the Shanghai Cooperation Organization, the community and the Group of 20 Bricks, become an objective and necessary response, to reproduce a new world, with multiplier balances, which provides a safe departure for human society, towards the prospects of cooperation and integration, and to get out of the crises, And thus came the international orientation of the strategic triangle (Russia, China and India) to lay the foundations of this world, through enhanced cooperation among the three countries and increased economic ties, forming a image of an Asian pole having its own system. No doubt, the bilateral and multilateral strategic partnerships formed between the forces of competition would have widespread impact in steering reactions and global geostrategic balances, since the movement of their own balances will be controlled by global trends in corporate strategy formation held with States converged in interests and goals, as well as its capabilities contributing to the success of strategic performance.  the future of the geostrategic equilibrium which started after the U.S downturn posed by features and confirmed by facts and events in international interactions and strategic partnerships formed by world powers competing with the United States indicate the direction of future balances movement towards equivalence in potential and capacities and resulting performance of strategic and global influence shared by world powers with a view to defending their interests and objectives of the powers allied with it

مكانة اليابان في النظام السياسي الدولي الواقع والمستقبل Japan's stAtus in the international political system : Present and Future

اسم المؤلف: علي رسول حسين المسعودي
اسم المشرف: فكرت نامق عبد الفتاح العاني
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

السياسة التركية تجاه سوريا بعد 2002 Turkish policy toward Syria after 2002

اسم المؤلف: عباس سعـدون رفعــت
اسم المشرف: محمد كريم كاظم
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: he subject thesis deals with international politics issue and it is useful because it clarifies how to deal with foreign regional and international environment and how to arrange it to serve a state interest in general as far as in understudy interest to make use of its results in national issues. The subject of this thesis (Turkish policy toward Syria) is very important due to the several variables like Turkish and Syrian policies and their mutual effects on Iraq. Studying Turkish foreign policy toward Arabic region in general and Syria specifically clarifies its change from being stable then dropping Arabs and Syria as a choice before 2002 then act intensively with the issues of Arabs including Syria since 2002 while in 2011 Turkey left its neutrality and non - interference in internal Arabic issues as Arabic revolutions broke up and started interfering to express its existing power with points of view to what happening in its neighborhood. As the Syrian condition specially after 2011 regarded as a special case, studying the Turkish dealing with it is important because it gives us evidences about what Turkey plans for coming years depending on the development scale of its policies in the past years in general and toward Syria specially. The Turkish policy toward Syria as we clarify in this thesis, passed several stages of development as it started with a revolution and multi - contents struggles but it turned to stability after 1998 then started cooperation specially after 2004 till 2011 when it was turned hard down then the struggle indications begun between the two countries with strong clashes and high level interference. The conflict of this thesis is linked to the following question : Why the Turkish policy toward Syria figured in this way since 2002 and the answer of this question as it was shown in this thesis refers to the wide effect of Justice & Development Party on the Turkish policy that push Turkey to play its role in accomplishing changes in the Arabic and regional countries including Syria as a result of the international changes and pressure. In other meaning, Turkey designs its foreign policy in depending on two factors : The first one is related to its commitments with NATO and western relationships which is the main factor pressing on all circles of interests. As western countries represent the main circle of interest and all the roles of turkey are as a results of the NATO and west demands. The second factor is related to its power and historical reasons which were aroused toward Arab region in 1970s rationally when the western countries ignored Turkish interests in Cyprus and also because Turkey as an industrial country in need for energy, markets and capitals was influenced by Arabs oil ban and also because Arab region is encouraging to open chances to turkey. Within 1990s, several controversial issues appeared in Turkey - Arabs relationships generally and with Syria specifically like : - Water issue, Turkey has plenty of water resources with ambitious economic trends but also has problems with Kurds. So turkey used water to have several aims for instance to develop Kurdish areas to push them to leave politics to production and also used water in making peace in middle east to have central statue in the regional relations but that thing caused crises with Syria and Iraq because it lowered water level in the two countries. - Kurdish issue, Turkey does not admit about the Kurdish existence in turkey while it helps Iraqi Kurds by giving them facilities to world via Turkey that revealed the Turkish dual standards in dealing with Kurds problem for its cooperation with Kurds in other countries as a pressure method while all rights of Kurds in turkey are forbidden. Syria made use of that to gain benefits in its relationship with turkey from 1995 to 1998. - Border issue, Mosul and Iskenderun are the main problems. Turkey demands to take Mosul because it was not under the alien's occupation in the First World War in the time of signing peace agreement between fighting countries while Turkey kept its control over Iskenderun as a result of its agreement with France when turkey agreed to participate in the Second World War beside the aliens. From time to time, that subject is aroused and influences on the two countries relations. As a result of the two factors activity (west and Turkish trends) we found that turkey started to take part in Arab countries generally and toward Syria specifically after the demonstrations begun as it was related to internal factors interaction (related to the public desire to end political introversion) and also related to external factors ( the American desire to rearrange the political map in Arab countries in general through chaos and inner struggle in Arab societies). So, turkey involved in internal roles and its policy was implementing in accordance with west countries desires for example, Turkey threatens use military power to protect civilians but stop going further because the western countries do not like that. On the light of what presented before, the conclusions are : 1. Turkish policy is influenced by several internal, regional and international factors and the most important one is its links with west to do what they like turkey to do in its region as changes occurred after cold war.2. The Turkish policy toward Arabs is not stable for its link to the west because the economic reasons and (energy, water and Kurds) are pushing to make bilateral relations not confronting while we find out how turkey gives high importance to its relations with Israel (in spite of what happened in Lebanon in 2006, what happened in Gaza in 2008 and also the freedom fleet in 2010). In other meaning, the Turkish will is under the west control.3. The Turkish policy toward Syria moved from clash and difference before 2002 to cooperation after2004which refers to bilateral readiness of cooperation in spite of difference issues in Turkish - Arabs relations. Turkey is aware of the stress that Arabs can use against it just like Kurds issue. So if Arabs lack legitimate in govern, turkey did not decide yet the identity of state and the future of Kurds in turkey.4. The link between Justice & Development Party and Islam might produce some Turkish attitudes toward Arabs including Syria but the type of the Turkish interference in the Syrian event after 2011 showed that the Islamic factor is not active among Turkish government and its trends as strong as the link with the west. 5. Future suggests that turkey will have more interference in Arabs region issues because of its link to the west and also due to the continuous western efforts to push turkey to play roles in Arab countries that gave turkey significant statue after 2002, so turkey won’t sacrifices what gained as it inherits the Ottoman State and the regional change (the rise of Iran and also the rise of sectarianism in regional treatments for several reasons). None of that will make Turkey withdraw from interference in Arabs issues especially in the Syrian developments.Finally recommendations are : 1. Making importance to study all aspects of Turkish policy because it has developing trends, interests, issues to deal with and participating powers.2. Giving importance to studying all regional policies because studying Turkish policy toward Syria showed how regional implement its plans at the expense of other region states and people interests including Iraq. Therefore, it is important to make all that studies to help the Iraqi decision maker to take decisions and act in accordance with scientific and theoretic visions.3. Paying attention to the interconnectedness regional relations and interests. The Syrian crisis and its results presented that interconnectedness between regional countries in historical, geographical, political, ethnic and religion while ignoring that cause chaos in all countries.4. Making importance to study all the ways that lead to enhance Iraqi interest in regional relations as serving Iraq is the final aim of every thesis. Then making that studies deep to enable Iraq in accomplishing regional balance and achieve his interests in the region. What is related to this thesis we have to as a recommendation encourage building full regional security system to prevent some powers to possess alone the regional actions to fulfill its or another international interests.

النخبة السياسية في العراق 1958 - 2014 : دراسة في التوجيهات والاهداف The political elites that ruled Iraq (1958 - 2014) studies in trends and goals

اسم المؤلف: سعدي ابراهيم حسين
اسم المشرف: ليث عبد الحسن جواد الزبيدي
الموضوع العام: العلوم السياسية
السنة: 2015
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The present dissertation consists of four chapters preceeded by an introduction and followed by a conclusion . It sets out from questioning and if the political elites henceforth (P.Es) successivly ruled Iraq for the period (1958 - 2014) are and the same trends and gools ?The dissertation replies This inquiry by hypothesising that the (P.Es) successively ruled Iraq vary in their trends and goals , as each has its own ones . The trends and goals mainle of (P.E) ruled for (1958 - 1963) concentrated on constructing Iraqi state . The (P.E) of (1963 - 2003) was of Arabic national trends and goals . As for the (P.E) came to power in Iraq after 2003 , they are of no clear trends and goals , considering their different national , religions and sectarian trends and goals .To verity of valility of this Aypothesis , Ch1 studies the (P.E) ruled Iraq (1958 - 1963) . Ch2 studies the (P.E) ruled for the period (1963 - 1968) . Ch3 studies the (P.E) ruled Iraq (1968 - 2003) . while Che4 concerns the study for the (P.E) ruled since 2003 till 2014 .The disser tation has come to the following conclusions : First : - the ruling(P.E) of (1958 - 2003) are of persons mostly come from military establishment , with an important exceptions when these elites by headed by civil leaders , as the case with the political (Abdulrhman Al - Bazaz) who became prime minster , and the former Iraqi president (Saddam Hussein) came to power in 1979 as a president. the later , in spite driving himself to the military establish meant by seizing the biggest military rank , he still being actually a civilian .Second : - The (P.E) ruled Iraq before 2003 depended on their own capacities to take the power by making revolutions coups . While the (P.E) came to power after 2003 till the time of concluding this dissertation , depended on external factor represented by USA support to expel the previous (P.E) and substitute it by recent (P.Es) .Third : - The (P.Es) ruled Iraq all over the period specified for the purpose of the present study didn't succeed to a achieve their trends and goals , moreover , they encountered by internal obstacles and the (P.Es) themselves , as well as home and external (regional and international) obstacles .So , we could say the trends and goals that helped (P.Es) to take power , were at the same time reasons behind losing the power , especially before 2003 .After 2003 , the (P.Es) national and sectarian trends and goals were negative factors led rulling system specially and the whole country in general to many economical , political and security problem and crises . the most prominent one is the national and communal political share in rulling Iraq .Finally , the dissertation comes to a list and suggestion , including : - 1 - concerning the future (P.Es) trends and goals it is suggested that the new (P.E) have to adopt popular national trends and goals of all Iraqi people suitable for Iraqi situation , which promots and at the same time supported by the a general unified national identity . the best possible suggested strategy to achieve this to follow the steps and rebuilt state resemble that and ancient Iraqi empires since it unified all Iraqi nation under their title , as no Iraqi Arabs , Kurds and other could deny his Hondo our to be belong to those civilizations .So , we could keep Iraq away from the risk of national and sectarian trends and goals .2 - concerning the mechanism to take the power : - The study suggests that the peaceful exchang of power is that best way must be adapted by the future(P.E) as it is founded by USA in Iraq after 2003, and they must leave the second alternative , i.e the violence to take the power which was the only way the past since 1958 .3 - concerning the political performance , the study concentrates the necessity of correspondence between trends and goals on one hand , and the (P.Es) , performance on the other hand . this could be achieved by adopting reviewing trends and goals periodically by the (P.Es) and reforming these trends and goals to be realistic of applicable within a reasonable and useful period for Iraqi people , not imaginary and Uri realistic like establishing national state , while the existed Arab countries are under the risk of partioning one after one . Neither trying to establish a communal (sinni or Shiite) state while Iraq realy consists of more than one religion or sect .

دراسة جيوكيميائية لعنصر الرصاص في الانطقة السطحية وتاثيراته البيئية في مدينة كركوك/ شمالي العراق

اسم المؤلف: نور محمد سمين
اسم المشرف: حسن احمد علي الجميلي
الموضوع العام: علم الارض
السنة: 2015
الموضوع الدقيق: الصخور والمعادن
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: كركوك
الصفحات الاولى:

الجوانب الاقتصادية والمالية في كتاب (صحيح ابن حبان) توفي 354هـ

اسم المؤلف: ورقاء يونس يحيى الطائي
اسم المشرف: حمدان عبد المجيد محمد الكبيسي
الموضوع العام: التاريخ
السنة: 2015
الموضوع الدقيق: التاريخ الاسلامي
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

تاثير درجة حرارة القاعدة على الخواص التريكيبية والبصرية لاغشية Cu2ZnSnS4) CZTS) الرقيقة المحضرة بطريقة التحليل الكيميائي الحراري Effect of Substrate Temperature on Structural and Optical Properties of Cu2ZnSnS4(CZTS) Films Prepared by Chemical Spray Pyrolysis Method

اسم المؤلف: شهلاء منذر عبد المحسن ضاحي
اسم المشرف: نبيل علي بكر
الموضوع العام: علوم الفيزياء
السنة: 2015
الموضوع الدقيق: الاغشية الرقيقة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: ديالى
الصفحات الاولى:
المستخلص: تم في هذا العمل تحضير اغشيةCu2ZnSnS4 (CZTS) بطريقة التحلل الكيميائي الحرارية. وذلك بانمائها على قواعد زجاجية نظيفة ومسخنة عند الدرجات الحرارية °C((200,250,300,350,400,450.درست الخواص التركيبية والبصرية لهذه الاغشية باستخدام حيود الاشعة السينية (XRD)ومجهر القوة الذرية AFMومطياف الاشعة فوق البنفسجية - المرئية. اظهرت نتائج فحوصات الاشعة السينية ان الاغشية المحضرة كانت ذات تركيب متعدد التبلور ومن الـنـوع الرباعي وبالاتجاه السائد (112). وتم حساب حجم البلوريات بطريقة شيرر وكانت اعلى قيمة لها هي(34.401)nm عند درجة الحرارة°C .(450) واجري تحليل وليامسون - هول لجميع العينات والذي تضمن حجم البلوريات ولاجهادات المايكروية . اما نتائج مجهر القوة الذريةAFM فقد اظهرت تجانس ونعومة اغشية CZTS. كما تمت دراسة الخصائص البصرية للاغشية من خلال تسجيل طيفي النفاذية والامتصاصية ولمدى الاطـوال الـمـوجـية nm (900 - 300 ). تم حساب فـجـوة الـطاقة البصرية للانتقال الالكتروني المباشر الـمـسـمـوح باستخدام معادلة (Tauc) وقد وجد انها تقل بزيادة درجات الحرارة وتتراوح قيمهاeV (1.85 - (2.3. وقد وجد ايضا ان قيم طاقـة اورباخ تتراوح بين 477) meV - 643). وتم حساب الثوابت البصرية للاغشية المحضرة والتي تضمنت (معامل الامتصاص وثابت العزل بجزايه الحقيقي والخيالي والتوصيلية البصرية) كدالة لطاقة الفوتون ومعامل الانكسار ومعامل الخمود كدالة للطول الموجي. | In this work, Copper zinc tin sulfide (CZTS) films are prepared by using a chemical spray pyrolysis technique. CZTS thin films have been grown on clean preheated glass at different substrate temperature of (200,250,300,350,400 and 450) oC. The structural and optical properties of these films have been studied using XRD, AFM, and UV - Visible spectroscopy. The XRD results showed that all films are polycrystalline in nature with tetragonal structure and preferred orientation along (112) plane. The crystallite size was calculated using Scherrer’s formula and it is found that the CZTS thin films have maximum crystallite size of (34.401 nm) at substrate temperature of 450 oC. Williamson - Hall analysis was carried out for all samples and the crystallite size along with microstrains were estimated. AFM results show homogenous and smooth thin films. The absorbance and transmittance spectra have been recorded in the wavelength range of (300 - 900) nm in order to study the optical properties. The optical energy gap for allowed direct electronic transition was calculated using (Tauc equation). It is found that the band gap decreases as the substrate temperature increases and the optical allowed energy gap for the direct electronic transitions was in the range of (2.3 - 1.85) eV. The Urbach energy values range between (477 - 643) meV. The optical constants including (absorption coefficient, real and imaginary parts of dielectric constant and optical conductivity) is also calculated as a function of photon energy. Refractive index and extinction coefficient are estimated as a function of wavelength.

التقريب العملي والمحاكاة للمميزات الميكانيكية والحرارية لخليط متراكبات نانوية (PVC - PA) /CNTs Empirical and Simulation Approach of Mechanical and Thermal characteristics of CNTs / (PVC - Polyamide) Blend Nanocomposites

اسم المؤلف: هناء كاظم عيسى
اسم المشرف: بهجت بهلول كاظم
الموضوع العام: علوم الفيزياء
السنة: 2015
الموضوع الدقيق: الفيزياء
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذه الدراسة تم قياس, التوصيل الحراري (K), معدل التعرية (Ar), الانتشار الحراري (D), التدفق الحراري (e), متانة الضغط (σc), متانة الكسر (Kc), لخليط من(PVC - PA) المعزز بكسر حجمي مختلف لل(MWCNTS Vol.%) حيث تم دراسة كل من الخواص الحرارية والميكانيكية لهذه المتراكبات النانوية, التي هي عرضة لتغيرات الكسر الحجمي. تتكون المتراكبات النانوية في هذه الدراسة من خمس مجموعات, خليط من (PVC - PA), خليط من (PVC - PA) المدعم ب(0.2 % MWCNTs Vol. %), خليط من (PVC - PA) المدعم ب (0.4 % MWCNTs Vol. %), خليط من (PVC - PA) المدعم ب(0.6 % MWCNTs Vol. %), خليط من (PVC - PA) المدعم ب(0.8 % MWCNTs Vol. %). تم استخدام تقنية القولبة اليدوية لاعداد هذه المتراكبات وكذلك استخدام الموجات الفوق صوتية الى جانب تقنية الاهتزاز المغناطيسي. تم استخدام تقنية قرص لي لقياس التوصيلية الحرارية (K), ومن خلال توظيف المسعر الحراري تم قياس السعة الحرارية (C_p), ولقياس الكثافة (ρ) فقد تم استخدام طريقة ارخميدس, في حين الانتشار الحراري (D) والتدفق الحراري (e) قد تم قياسهما باستخدام القيم التجربيبة من الموصيلية الحرارية والسعة الحرارية والكثافة. تم استخدام تقنية الشعلة الاوكسي - استيلينية لتحديد معامل التعرية وفقا لنظام الجمعية الامريكية لاختبار المواد (ASTM 25 - 80). تم استخدام الة (Instron) لقياس قوة الضغط وفقا ل(ASTM - D659 - 85), تم استخدام الة اختبار (مطرقة البندول ) نوع شاربي لتحديد متانة الكسر وفقا (ISO - 79). برامج محاكاة لنقل الحرارة في ثلاثة ابعاد لقياس التوصيلية الحرارية, السعة الحرارية, الانتشار الحراري, التدفق الحراري ومعامل التعرية لعينات متراكبات نانوية حيث نفذت طريقة الفروق المحددة . تظهر نتائج التوصيلية الحرارية ان قيمها تزداد تدريجيا من خلال سلسة من الكسر الحجمي لل (MWCNTs). ويتصرف معدل التعرية على نحو عكسي على النحو الاتي : حيث انه ينخفض عند ارتفاع الكسر الحجمي لل (MWCNTs) . وتبين نتائج الانتشار الحراري (D) تزايد ويرجع ذلك الى زيادة نسبة الكسر الحجمي لل (MWCNTs), مما يؤدي الى زيادة المسارات الحرارية نتيجة التشتت الجيد من(MWCNTs) داخل خليط العينات. اما نتائج التدفق الحراري(e) تظهر نتائجه تزايد عند زيادة الكسر الحجمي لل (MWCNTs) المدعم ويمكن شرح هذا التزايد الحراري نتيجة التشتت الجيد من (MWCNTs) وهذا ايضا يؤدي الى المزيد من المسارات الحرارية على سطح العينات والتي تؤدي الى زيادة قيم التدفق الحراري. علاقة التوصيل الحراري - معامل التعرية, يعرض اليتين , في البداية ومع انطلاق الاختبار يظهر التوزيع الامثل لل (MWCNTs) الامر الذي يؤدي الى التشتت الحراري بسبب تكون شبكة منفصلة من المسارات الحرارية , وترتبط الالية الثانية مع اختبار التعرية خلال ظهور القص وظهور الشقوق, الامر الذي يؤدي الى الالية السابقة لانتاج التفحم. اظهرت النتائج ان قوة الضغط( σc) تزداد مع زيادة الكسر الحجمي (MWCNTs), حيث يحدث الكسر من خلال نوعين من الالية في مواقع مختلفة في نفس الوقت, اولا الكسر الناجم عن ضغط الاجهاد الامر الذي يؤدي الى ظهور الانحناء, والالية الثانية يحدث الكسر عن قص الاجهاد والذي يؤدي الى تشققات القص. اظهرت النتائج ان متانة الكسر (Kc) تزداد مع زيادة الكسر الحجمي (MWCNTs) ويحدث الكسر نتيجة الية الانسحاب التي تحدث في المتراكبات النانوية. محاكاة نتائج الموصيلية الحرارية, والتي تحسب وفقا لنموذج نيلسن, وعند مقارنتها مع النتائج التجريبية, فقد لوحظ من النتائج التجريبية ان قيم التوصيلية الحرارية تقع مابين قيم المحاكاة بالاتجاة العمودي وقيم المحاكاة بالاتجاة العشوائي مع الاخذ بالاعتبار اتجاة التدفق الحراري والذي يدل على ان ترتيب المواد المدعمة (MWCNTs) هي اقرب للاتجاة العمودي اكثر من الاتجاة العشوائي او المتوازي, بالنسبةلاتجاة التدفق الحراري. وهذا يمكن ان يفسر قيم نتائج التعرية العملية اعلى من نتائج المحاكاة , وذلك بسبب وجود السطح البيني للمواد المتراكبة والتي تمتلك قوة عالية واواصر ربط عالية . المتراكبات النانوية المستخدمة في هذه الدراسة والتي تمتلك كسر حجمي كبير, يمكن استخدامها في التطبيقات التي تحتاج الى تشتت حراري عالي ومتانة تعرية اوتقشر عالية, ومتانة انضغاطية عالية, ومقاومة عالية للانحناء. | In this study, thermal conductivity (K), ablation rate (Ar), thermal Diffusivity (D), thermal Effiusivity (e), compression strength (σc) , and fracture toughness (Kc), for (PVC - PA) blend reinforced with different volume fraction of (MWCNTs Vol. %), have been studied, in terms of, thermal and mechanical properties, which are subject to change in different volume fraction. The nanocomposites candidates for this study are divided into five groups; (PVC - PA) blend, (PVC - PA) blend with (0.2% MWCNTs Vol. %), (PVC - PA) blend with (0.4% MWCNTs Vol. %), (PVC - PA) blend with (0.6% MWCNTs Vol. %), (PVC - PA) blend with (0.8% MWCNTs Vol. %). Hand - Molding technique is used to prepare these composites as well as ultrasoniccation coupled with magnetic stirred technique has been used to prepare the nanocomposites. Lee’s disc technique is used to measure thermal conductivity. By employing the thermal calorimeter, it has been used to determine the heat capacity (C_p), to measured the density (ρ), it has been using Archimedean method, while the thermal Diffusivity (D) and thermal Effusivity (e) has been measured by using the experimental values of thermal conductivity, heat capacity and density. Oxy - acetylene flame technique is used to determine ablation rate according to (ASTM - E285 - 80). Instron machine is used to measure compression strength according to (ASTM - D659 - 85). The impact testing machine is used in Charpy impact mode to determine the fracture toughness according to ISO - 79. Simulation programs of heat transfer in three dimensions of thermal conductivity, heat capacity, thermal Diffusivity, thermal Effusivity, and ablative test for nanocomposites specimens are carried out using finite difference method. Thermal conductivity results show, that (K) values increase gradually by sequence of volume fraction of MWCNTs. Ablation rate behaves reverses as follow; it drops at high volume fraction of MWCNTs. Thermal Diffusivity (D) results show an increasing due to the increase of the volume fraction of MWCNTs, which lead to increment in thermal paths as a result of good dispersion of MWCNTs inside the matrix blend of specimens. Thermal Effusivity (e) results show increasing as well as increasing the volume fraction of MWCNTs Vol. % and it can be explained the increasing of thermal effusivity as related to good dispersion of MWCNTs which again lead to many thermal paths as well as on the surface of the specimens which lead to increment in effusivity values. The thermal conductivity - ablation rate relationship, displays two mechanisms. At first, linked with the starting of test, is recognized by ideal distribution of (MWCNTs), which leads to thermal dispersion due to the formation of segregated network of thermal conducting paths. Second mechanism is linked with ablation test recognized by shearing cracks appearance, which leads to earlier char production mechanism. Compression strength results show that (σc) increases with the increasing volume fraction of (MWCNT Vol. %.) The failure takes place through two kinds of mechanism in different positions at same time. First, failure caused by compressive stresses, which leads to buckling phenomena, and second mechanism, failure causes by shearing stress, which lead to shearing cracks. Fracture toughness results show that (Kc) increased with the increasing of volume fraction of (MWCNTs). Failure takes place by pullout mechanism with respect to nanocomposites. Simulation thermal conductivity results, which are calculated according to Nielsen model, and when it is compared, with the experimental results, it has been observed, that the experimental results, are fallen in between the perpendicular direction simulation values and random direction values for (MWCNTs), with respect to heat flux direction, which is evidenced that the (MWCNTs) arrangement closed to perpendicular direction more than random or parallel direction ,with respect to heat flux direction. Ablation experimental results values coming higher than simulation results values, this could be explained, as the interface affect of nanocomposites, which had high strength and strong bond force. Nanocomposites used in this study, which have high volume fraction of Vol. % can be used in applications, which need high thermal dispersion, high ablation resistance, high compression strength, and high resistance of impact.
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