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Article
Evaluation of Oxidative Stress with Thyroid Function in Growth Hormone-deficient Children from Misan Government ,Iraq.

Authors: Mohammed Abdul-Mounther --- .Mohammed Abed Draweesh --- Farah Mjbaal --- Mahdi Murshd
Journal: Misan Journal of Acodemic Studies مجلة ميسان للدراسات الاكاديمية ISSN: 1994697X Year: 2017 Volume: 16 Issue: 32 Pages: 78-90
Publisher: Misan University جامعة ميسان

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Abstract

Aim: Growth hormone deficiency (GHD) is a complex endocrine syndrome, which is most commonly known to affect the pediatric population. However, adults also suffer from GHD, and it is often seen as part and parcel of the aging phenomenon. We aimed to investigate the levels and relationships of antioxidants, lipid peroxidation and thyroid function with altogether in growth hormone deficiency .Method:This study was conducted to measure a group of hormones related with infected individuals with the shortage of the growth hormone by studying 57 sample Which represents patient groups were ( 38 boys and 19 girls ) divided in to two groups according to age Group (1): consist of 26 patients (boys 14 and 12 girls ) their aged ranged from 2 to 8 years and Group (2) Consisted of 31 patients ( 24 boys and 7 girls ). Their ages ranged from 9 to 16 years in comparison with 50 samples taken from normal individuals as a control group. The concentration of hormones has been measured were human Growth hormone (hGH) Total Triidothyronin(TT3), Total Thyroxin (TT4),Free Thyroxin (FT4)Thyroid Stimulating (TSH), serum malondialdehyde (MDA) ,Vitamin C , Erythrocyte superoxide dismutase (SOD) activity, plasma Total antioxidant capacity (TAC)

Keywords

Oxidative Stress


Article
Measuring the Residual Stress by Using New Experimental ⅣIethods Depend on the Stress Concentration.

Authors: Sabah Kh Hussein --- Suhad D Salman --- Kadhim K Resan
Journal: Journal of College of Education مجلة كلية التربية ISSN: 18120380 Year: 2010 Issue: 3 Pages: 210-221
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The residual strcss is that which remttns in a body thatis stationaryand at cquilibHum with its surrclundings lt can be vcry dct五incntal tothc pcrfollllancc of a matcrial or thc lifc of a componcntAltcrnativcly,beneflcial rcsidual strcsscs can be introduccddclibcratcly Residual strcsscs arC mOrc difflcult to prcdict than thc in―cxpeHrnental incthods to scrvicc stresscs Thcrc arc rnany differentmeasure thc rcsidual strcss such as holc dHlling and x― ray ln thispaper,the new incthod is proposed to mcasurc thc residual strcss inweldment,this mcthod dcpends on thc strcss concentration factor for circle hole with different distance from weld line for differentspecimens (five specimens) , the hole is the region of measure theresidual stress .Also , the heat treatment is applied for differentspecimens as same condision and dimention to measure the decreasein the stress .The results are in a good agreement with anothermethod.


Article
Stresses and Displacements Analyses around Tunnel Opening Under Water Body Using Finite Element Method (FEM) in Baghdad City/Middle of Iraq
تحليل الاجهادات والهبوط حول فتحة نفق تحت جسم مائي باستخدام طريقة العناصر المحددة (FEM) في مدينة بغداد/ وسط العراق

Authors: Hamed H. Abdullah حامد حسن عبد الله --- Ameer H. Al-Saffar أمير حيدر الصفار --- Raed S. Jasim رائد ساعي جاسم
Journal: Iraqi Journal of Science المجلة العراقية للعلوم ISSN: 00672904/23121637 Year: 2016 Volume: 57 Issue: 2B Pages: 1267-1279
Publisher: Baghdad University جامعة بغداد

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Abstract

In this study, the stresses and displacement around a tunnel opening under water body in Baghdad city, middle of Iraq, during excavation and lining are discussed. For this purpose, the finite element method (FEM) was adopted as an effective approach to analyze the problem using (SIGMA/W) program. The research includes the study of the behavior of soil due to excavation of a tunnel by calculating the displacements and stresses in three positions of the tunnel (crown, wall, and invert) during the various stages of construction. The surface settlement is also studied. The finite element analyses were carried out Using (Elastic- plastic) and (linear elastic) models for the soil and the concrete liner respectively.

في هذه الدراسة تم تحليل الاجهادات والازاحة خلال مراحل الحفر والتبطين لنفق تحت جسم مائي في مدينة بغداد وسط العراق. تم اعتماد طريقة العناصر المحددة (FEM) كمنهج فعال لتحليل تصرف النفق باستخدام برنامج (Sigma/W). وتضمن البحث دراسة سلوك التربة نتيجة حفر النفق عن طريق حساب الازاحات والاجهادات في مواقع ثلاثة وهي (Invert, Wall, Crown) من النفق خلال الحفر والتبطين.أجريت التحليلات باستخدام العناصر المحددة بأعتماد نموذجين وهما اللدن مرن والمرونة الخطية لتمثيل التربة ومادة بطانة النفق على التوالي.


Article
EFFECT OF OXIDATIVE STRESS ON LIPID PROFILE AND BLOOD PARAMETERS TO A SAMPLE OF STUDENTS AT UNIVERSITY OF ZAKHO DURING EXAMES
تاثير الاجهاد التاكسدي على مرتسم الدهون وبعض المتغيرات الدميه لنموذج من الطلاب في جامعة زاخو اثناء الامتحانات

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Abstract

Worry, anxiety through Study and preparative to exam may lead to mental stress. Mental stress may contribute to oxidative stress in the body which is the change in balance between oxidants and antioxidants.In this study a concentration of Malondialdehyde (MDA) as a lipid oxidation biomarker, lipid profile and some blood parameters like Minmum Inhibitory dilution (MID) were estimated in twenty chemistry and biology students at the day of exam as Stress Condition (SC) compared with the same parameters which obtained from the same students during the university vacation after a month of doing the latest exam as non-Stress Condition (nSC).A significant increase in MDA (p=0.0019), Total Cholesterol (p<0.05), Triglyceride (p<0.05), Low Density Lipoprotein LDL-Cholesterol (p<0.05), Very Low density lipoprotein VLDL-cholesterol (p<0.05) and A significant decrease in High - Density Lipoprotein HDL - Cholesterol (p<0.05), HDL-Cholesterol to total cholesterol ratio(p=0.0012) in stress condition were observed when compared with “non-stress” conditions. Also there were high significant decreases in lymphocyte and minimum inhibitory dilution (MID) (p=0.0001, p<0.0001 respectively) and significant increases in granulocyte and platelets (PLT) (P=0.0113, P=0.0031 respectively) in stress condition compared to non-stress condition. Whereas no significant changes in total WBCs and RBCs in stress and non-stress conditions. These results suggested that during university examinations when students are under mental stress or psychiatric disorder may put them at risk of developing inflammatory disorders like atherosclerosis and/or coronary arteries disorders.

القلق والضغط النفسي خلال المذاكرة والاستعداد للامتحان قد يؤديان الى أجهاد ذهني والذي ربما يساهم بإحداث كرب تأكسدي في الجسم ناتج عن تغيير في التوازن ما بين المؤكسدات ومضادات الاكسدة. في هذه الدراسة تم تقدير تركيز المالون داي الديهايد (MDA)كمؤشر حيوي لأكسدة الدهون وايضا مرتسم الدهون وبعض قياسات الدم مثل التخفيف المثبط الادنى (MID) لعشرين طالب من قسم الكيمياء وقسم علوم الحياة في يوم الامتحان كحالة اجهاد (SC) بالمقارنة مع نفس القياسات لنفس الطلاب خلال العطلة الجامعية بعد شهر من ادائهم اخر امتحان كحالة عدم اجهاد (nSC).تمت ملاحظه زياده معنوية في المالونيل داي الديهايد (MDA) (P=0.0019) والكولسترول الكلي (P<0.05) و الدهون الثلاثية (P<0.05) والبروتين الدهني واطئ الكثافة (P<0.05) والبروتين الدهني واطئ الكثافة جدا (P<0.05) وانخفاض معنوي في البروتين الدهني عالي الكثافة الكوليسترول (P<0.05) وفي نسبة البروتين الدهني عالي الكثافة الى الكوليسترول الكلي( (HDL-cholesterol/T-cholesterol (P=0.0012) لدى الطلاب في حالة الاجهاد مقارنة بحالة عدم الاجهاد بالإضافة الى انخفاض معنوي عالي في الخلايا اللمفاوية والتخفيف المثبط الادنى (MID)(P<0.0001 , P=0.0001 بالتعاقب( وزيادة معنوية بالخلايا الحبيبية والصفائح الدموية P=0.0113) ،p=0.0031 بالتعاقب( في حالة الاجهاد مقارنة بحالة عدم الاجهاد. بينما لم يوجد اي اختلاف معنوي في كريات الدم البيضاء والحمراء في حالة الاجهاد مقارنة بحالة عدم الاجهاد. تقترح الدراسة انه خلال الامتحانات الجامعية يكون الطلاب تحت تاثير اجهاد ذهني ونفسي ربما يؤدي الى تطور امراض التهابية كتصلب الشرايين او اعتلال الشرايين التاجية.


Article
Prevalence of Recurrent Aphthous Ulceration in the Diyala Population
انتشار التقرحات القلاعية المتكررة في سكان ديالى

Author: Mustafa Gheni Taher مصطفى غني طاهر
Journal: Diyala Journal of Medicine مجلة ديالى الطبية ISSN: 97642219 Year: 2018 Volume: 15 Issue: 2 Pages: 112-118
Publisher: Diyala University جامعة ديالى

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Abstract

Background: Recurrent aphthous stomatitis (RAS) are an inflammatory condition and most the common ulceration of the oral cavity of the patients that make them to ask dental practitioner consultation. most ulcers are associated with pain and heals spontaneously for some days. Objective: To calculate the prevalence of this type of ulcers in diyala governorate among males and females and its association with stress and evaluate the independent issues correlated to this oral mucosal state.Patients and Methods: A total of 80 patients who attended to the Baquba teaching hospital from April 2016 - April 2017 and fill the required questioner of this study which including age, gender, site, size of ulcer, stressed condition and smoking status in addition to other questions.Results: The prevalence of RAS was 17.4%, the third decade of life were the most affected age. Males were affected more than females and the tongue were the most affected sites represents (25 %)of the cases. stress was the most causative factors of this lesions. Conclusion: In diyala governorate, the Aphthus lesion is the main features of stress among males.

خلفية الدراسة: التهاب الفم القلاعي المتكرر هو حالة التهابية ومعظم التقرح الشائع لتجويف الفم من المرضى التي تجعلهم يطلبون استشارة طبيب الأسنان. ترتبط معظم القرحة بالألم وتشفى بشكل عفوي لعدة أيام.اهداف الدراسة: هدفت هذه الدراسة الدراسة إلى حساب انتشار هذا النوع من القرحة في محافظة ديالى بين الذكور والإناث وارتباطه بالإجهاد وتقييم القضايا المستقلة المرتبطة بهذه الحالة المخاطية الفموية.المرضى والطرائق: بلغ عدد المرضى الذين حضروا إلى المستشفى التعليمي في بعقوبة 80 مريضاً في الفترة من أبريل 2016 حتى أبريل 2017 وتم مليء القوائم المطلوبة من هذه الدراسة بما في ذلك السن والجنس والموقع وحجم القرحة والحالة المجهدة وحالة التدخين بالإضافة إلى اسئلة اخرى.النتائج: كان معدل انتشار التهاب الفم القلاعي المتكرر 17.4 ٪ ، وكان العقد الثالث من العمر أكثر الفئات العمرية تأثرا. تأثرت الذكور أكثر من الإناث وكان اللسان أكثر المواقع تأثرا تمثل (25٪) من الحالات. كان الإجهاد أكثر العوامل المسببة لهذه التقرحات.الاستنتاجات: في محافظة ديالى ، تعتبر التهابات الفم القلاعي المتكرر السمات الرئيسية للتوتر بين الذكور.

Keywords

Aphthus --- Stress --- Diyala. --- Aphthus --- Stress --- ديالى .


Article
Stress Evaluation of Low Pressure Steam Turbine Rotor bBlade and Design of Reduced Stress Blade

Author: Arkan K. Husain Al-Taie
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2008 Volume: 26 Issue: 2 Pages: 169-179
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The low pressure steam turbine blade rows have a history of stress failure . They suffer fromtensile and bending stresses partly due to the centrifugal force as a result of high rotationalspeeds and partly due to high pressure, temperature and speed steam loading. The centrifugalforce is one of the problems that face the designers of turbine blades especially the long ones.The designer always aims at reducing these stresses. One way to do so is by the reduction of blademass. That is to make the blade of variable cross section stead in of straight. This paper presentsthe method of reducing cross section. Analysis of such blade is also done as applied to the (P 23-14A) steam blade.

Keywords

Steam Turbines --- Design --- Stress


Article
Evaluation Of The Method Of Stress Characteristics For Estimation Of The Soil Bearing Capacity
تقييم طريقة خصائص الإجهاد في تخمين قابلية تحمل التربة

Authors: Mohammed Y. Fattah --- Mohammed F. Aswad --- Mohammed M. Mahmood
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2008 Volume: 26 Issue: 10 Pages: 1171-1184
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The classical bearing capacity theories rely on the superposition of three separatebearing capacities – a technique that is inherently conservative – but they also rely ontabulated or curve-fitted values of the bearing capacity factor, Nγ, which may beunconservative. Further approximations are introduced if the footing is circular(multiplicative shape factors are used to modify the plane strain values of , Nc, Nq and Nγ) orif the soil is non-homogeneous (calculations must then be based on some representativestrength). By contrast, the method of stress characteristics constructs a numerical solutionfrom first principles, without resorting to superposition, shape factors or any other form ofapproximation.In this paper, the validation of the method of stress characteristics is tested by solvinga wide range of bearing capacity problems. The results are compared with classical bearingcapacity theories; namely, Terzaghi, Myerhof, Hansen and Vesic methods.It was concluded that the bearing capacity predicted by the method of stresscharacteristics for the case of a circular footing in clay ranges between (3.7 – 4.0) greater thanTerzaghi, Meyerhof, and Vesic methods. This means that the method is not conservative forthis case and can be dependent for economic design of foundations. The bearing capacitypredicted by this method increases linearly with (D/B).For all values of the angle of friction, φ, the method reveals bearing capacity values forsmooth footings greater than Terzaghi and Hansen and smaller than Meyerhof and Vesictheories. Considering the foundation to be rough, the method gives bearing capacity valuesgreater than all other methods. The difference increases as the angle of internal friction(φ) increases. This makes the method unreliable for rough foundations.

إن النظريات التقليدية لحساب قابلية تحمل التربة تعتمد على تجميع ثلاث قابليات تحمل مختلفة (والتي إما أن N_ , هذه التقنية تعتبر ضمنيا تقليدية) و لكنها تعتمد أيضا على قيم معامل قابلية تحمل التربةتكون مرتبة في جداول أو قيم مقربة من المنحنيات وهذه القيم قد تكون غير تقليدية أو مبالغ فيها. و هناكتقريبات إضافية تدخل إذا كان الأساس دائريا (حيث تستعمل معاملات الشكل لتغيير قيم الانفعال المستويأو عندما تكون التربة غير متجانسة (حيث في هذه الحالة يجب أن تكون (N_ و _q وNc للمعاملاتالحسابات مبنية على قيم ممثلة للمقاومة). و بالمقارنة, تقوم طريقة خصائص الإجهاد بإنشاء حل عددي منالمبادئ الأساسية دون الرجوع إلى التجميع أو معاملات الشكل أو أي شكل من أشكال التقريب.في هذا البحث تم اختبار صلاحية طريقة خصائص الإجهاد بحل مدى واسع من مسائل قابليةالتحمل. و قورنت النتائج مع النظريات التقليدية لقابلية التحمل مثل طرق ترزاكي و ميرهوف و هانسن وفسك. و قد وجد أن قابلية التحمل المحسوبة بطريقة خصائص الإجهاد لحالة أساس دائري في الطين أكبر4.0 ) مرة من طرق ترزاكي و ميرهوف و فسك. و هذه يعني أن الطريقة ليست تقليدية لهذه - بحوالي ( 3.7الحالة و يمكن اعتمادها لتصميم اقتصادي للأسس. كما أن قابلية التحمل المحسوبة بهذه الطريقة تزداد خطيا) تعطي هذه الطريقة _ و لجميع قيم زاوية الاحتكاك الداخلي ( .(D/B) مع نسبة العمق إلى عرض الأساسقيما لقابلية التحمل للأسس الملساء أعلى من نظريات ترزاكي و هانسن و أقل من نظريات ميرهوف و فسك.و عند اعتبار الأساس خشنا, تعطي الطريقة قيما لقابلية التحمل أعلى من جميع الطرق الأخرى, و يزداد) و هذا يجعل الطريقة غير معتمدة للأسس الخشنة. _ الفرق مع زيادة زاوية الاحتكاك الداخلي (


Article
Temporomandibular disorders in association with stress among students of sixth grade preparatory and students of fifth year high schools

Authors: Toka T. Alnesary تقى الناصري --- Rafil H. Rasheed رافل رشيد
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 70-74
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: A close relationship had been reported between depression, anxiety and many disease symptoms ordisorders. This is true for temporomandibular disorders which is a collective term embracing a number of clinicalproblems that involve the masticatory musculatures, temporomandibular joint and associated structures, or both. Thisstudy designed to evaluate the association of stress with temporomandibular disorders among sixth gradepreparatory students and students of fifth year of secondary school.Subjects, materials and methods: The sample's size of 404 students of sixth grade preparatory study (154males and250 females) and 360 (168males and 192females) of fifth year of secondary schools. Firstly all the students subjectedfor stress questionnaire, secondly the stressful students subjected to different combination of clinical andquestionnaire measures according to the research diagnostic criteria of temporomandibular disorders (axis I) whichhave standardized series of diagnostic tests based on clinical signs and symptoms. Data are analyzed by using Z-testand chi-square.Results: The results obtained from this study showed that no significant differences between classes in the percentageof stressful students with temporomandibular disorders according to the clinical examination but in both classes,females' students showed higher percentage of temporomandibular disorders than males of same class. Bruxism andnail biting were significantly higher among students of sixth grade.Conclusions: This study revealed that stress of studying at sixth grade has no effect on temporomandibular disordersprevalence.


Article
Trace elements and oxidative stress markers in saliva of subjects with amalgam fillings

Authors: Huda Sh. Ahmed هدى احمد --- Taghreed F. Zaidan تغريد زيدان --- Ali Yakub علي يعقوب
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 3 Pages: 63-66
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Amalgam is the most frequently used restorative material for dental treatment. It is mainly used inposterior teeth, usually on occlusal surfaces as an economical, long lasting and durable filling material and representthe main source of exposure to mercury and other toxic metals (copper, tin, silver, etc.).This study designed to measure oxidative stress marker malondialdehyde (MDA) and anti-oxidants (uric acid andglutathione) concentrations in saliva of subjects with amalgam fillings. And measure trace elements (copper, zinc)concentrations in saliva of subjects with amalgam fillings.Subjects,materials and methods: Fifty subjects were participated in this study, they were between the age of (20-50)years with amalgam fillings (cases group) and fifty one subjects with no amalgam fillings (control group), they weregender and age matched to that of subjects with amalgam fillings. Informed consent and ethical approval wasobtained. Each subject fill a case sheet questionnaire then examined by using sterile dental mirror and sterile dentalprobe to determine any oral manifestations and to calculate the number of amalgam filled teeth and the number offilled surfaces.Results: The results obtained from this study showed that Oxidative stress marker (MDA) were increased whileantioxidants (glutathione, uric acid) were decreased in saliva of subjects with amalgam fillings. Trace elements(copper, zinc) were higher in saliva of subjects with amalgam fillings; salivary copper was significantly higher insubjects with > 10 amalgam filled teeth. Salivary total glutathione was significantly correlated (negative correlation)with the number of filled teeth. Salivary copper was significantly correlated (positive correlation) with the number offilled teeth and filled surfaces.Conclusion: This study revealed that amalgam fillings associated with increase in oxidative stress marker(MDA) anddecrease in antioxidants (glutathione, uric acid).Trace elements (copper, zinc) increased in saliva of subjects withamalgam fillings.


Article
Determination of the effect of stress on the salivary cortisol level among sample of university students having myofacial pain

Authors: Rana M. Hasan --- Jamal N. Ahmed
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 3 Pages: 87-90
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Psychological stress is considered the major etiological factor precipitating myofacial pain andtemporomandibular disorders.It is known that stress induce various adaptational responses of physiologic systems. Theprocess includes increase in the activity of the hypothalamic -pituitary-adrenal axis which promotes cortisol secretion.Salivary cortisol has been used as a measure of free circulating cortisol levels.The use of salivary biomarkers hasgained increased popularity since collecting samples is non-invasive and painless. The aim of thisstudy was toevaluate the level of cortisol in saliva among sample of university students having myofacial pain, during the finalexam period and whether this finding could have a significant value as a symptomatic psychobiological marker.Materials and Methods: Ninety eight (98) university students were enrolled in this study. Fifty(50) were with myofacialpain (symptomatic) and forty eight (48) were without myofacial pain (asymptomatic) as a control group.Eachstudent with myofacial pain was examined according to Research Diagnostic Criteria for TemporomandibularDisorders. Saliva sample were collected from each subject before final examination and three months later forbiochemical analysis of cortisolusing ELISA test.Results: A highly significant difference in salivary cortisol level between the two periods for both the study and controlgroups, and a non-significant difference between the two groups in before examination period. A negativeassociation has been observed between the level of salivary cortisol and severity of pain and a highly significantimprovement of pain between the final examination periods and three months later.Conclusions: Dental students perceived a higher level of stress prior to the final exam was associated with raisedsalivary cortisol levels which could be considered as a useful non-invasive biomarker for measuring acute stress

Keywords

Stress --- Cortisol --- Myofacial pain

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