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Article
The effect of solar cells distribution on the Performance of solar panel
تاثير توزيع الخلايا الشمسيه على اداء اللوح الشمسي

Authors: Wildan M. Awaad ولدان محمد عواد --- Mohammed A.R. Hussain محمد عبد الرضا حسين --- Ali H. AL-Hamdani علي هادي الحمداني
Journal: Baghdad Science Journal مجلة بغداد للعلوم ISSN: 20788665 24117986 Year: 2010 Volume: 7 Issue: 3 Pages: 1250-1253
Publisher: Baghdad University جامعة بغداد

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Abstract

Three different distribution modules of silicon solar cells in a panel are used in this study . Each module consists of five identical circular silicon solar cells of radius (5cm) and then the total panel areas are identical. The five solar cells are arranged in the panel in different shapes: circular, triangular and rectangular .The efficiency for these three panel distribution are measured indoor and outdoor. The results show that the efficiency is a function of the cells distribution.

درست في هذا البحث ثلاث اشكال من توزيعات الخلايا الشمسيه السيلكونيه في اللوح الشمسي يتالف كل تورزيع من خمس خلاياسيلكونيه متشابهه نصف قطر الواحدة منها (5سم) وبذلك تكون المساحه الكليه للماده الحساسه متساوية. رتبت الخلايا الشمسيه الخمسه في اللوح الواحد باشكال مختلفه هي الدائرية والمثلثة والستطيلة، ثم تم قياس كفائة هذه التوزيعات مختبريا وحقليا وقد اوضحت النتائج ان الكفاءة هي دالة لشكل توزيع الخلايا في اللوح الشمسي.


Article
Study about Stem Cells and Some Application Therapy
الخلايا الجذعية وبعض تطبيقاتها العلاجية

Authors: آمنة نعمة الثويني --- عباس هادي حمادي العبيدي
Journal: Iraqi Journal of Biotechnology المجلة العراقية للتقانات الحياتية ISSN: 18154794 Year: 2007 Volume: 6 Issue: 2 Pages: 1-20
Publisher: Baghdad University جامعة بغداد

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Abstract

Stem cells characterize as a primitive cells and have the ability to divideand make new stem cells similar to it or produce different specialized cells , sothese cells remained unspecialized until receive special signals push it toevolutes into special cell. Most studies on the animal cell indicated that thepresence of this stem cells which able to differentiation to any kind of bodycells. Experiments revealed the ability of these cells to transform to any tissueor special organ in the body like, heart, muscle and nerve cells, and thesediscoveries bring back the hopes to use stem cells medically to compensated thedamage part and curing some dangerous diseases like , autoimmune diseases ,diabetes , Parkinson's , and other diseases , in addition knowing other differentkind neither it is embryonic , germen , adult, or cancer cell, and cellularorganization ways and modern techniques about discover it through usesurface marker or genetic engineering techniques and prevent moral fears thatconnected to take these cells from the embryo. This still continuous to findmany molecular properties which characterizes stem cells and investigate newmechanism for different cellular treatment of dangerous disease which stillunder research and discovery.___________________________________________________________

الخلاصةتتميز الخلايا الجذعية بكونها خلايا بدائية لها القدرة على الانقسام وتكوين خلايا جذعية جديدةمشابهة لها او تنتج خلايا متخصصة مختلفة لذا تبقى هذه الخلايا غير متخصصة الى ان تتلقى موشراتخاصة تدفعها للتطور الى خلايا متخصصة وكيفية تطورها ابتدأً من الزيجة وصولاً إلى الجنين كذلكالفرضيات المتعلقة حول منشأ استمرارية الخلايا الجذعية والتقنيات المختلفة المستخدمة للحصول علىهذه الخلايا وأشارت معظم الدراسات على الخلايا الحيوانية وجود هذه الخلايا الجذعية التي يمكنها التمايزإلى أي نوع من الخلايا الجسمية واظهرت التجارب امكانية تحول هذه الخلايا الى اي نسيج او عضومتخصص في الجسم مثل القلب والعضلات والخلايا العصبية. أعادت هذه الاكتشافات الآمال في استخدامهاطبياً لتعويض الاجزاء التالفة والشفاء من بعض الامراض العضال مثل امراض المناعة الذاتية والسكريومرض باركنسن والسرطان والزهايمر وغيرها من الامراض. لذلك يمكن التعرف على أنواع هذه الخلاياسواء كانت جنينية او جرثومية او خلايا بالغة او سرطانية وطرائق التنظيم الخلوي والتقنيات الحديثة فيالكشف عنها من خلال استعمال العلامات السطحية أو باستخدام تقنيات الهندسة الوراثية لتجنب المخاوفالأخلاقية والدينية المرتبطة باشتقاق هذه الخلايا الجذعية من الجنين ولازالت الدراسات مستمرة لايجادالعديد من الخصائص الجزيئية التي تتميز بها الخلايا الجذعية والبحث عن الاليات الجديدة للمعالجةالخلوية للعديد من الامراض الخطرة والتي هي قيد البحث والاستكشاف.


Article
LANGERHANS CELL HISTIOCYTOSIS IN CHILDREN

Authors: KHALID Q. ABD --- SALMA A. AL-HADAD --- MAZIN F. AL-JADIRY
Journal: Journal of the Faculty of Medicine مجلة كلية الطب ISSN: 00419419 Year: 2008 Volume: 50 Issue: 3 Pages: 296-302
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Langerhans cell histiocytosis (LCH) is a rare proliferative disorder of histiocytes
encompasses a wide clinical spectrum, ranging from a benign localized disease to acute
generalized disease with fatal outcome.
Objectives: to retrospectively evaluate clinical characteristics at diagnosis and outcome of
patients with Langerhans cell histiocytosis.
Patients and methods: A retrospective analysis of data on 21 children with Langerhans cell
histiocytosis followed at Oncology unit, Children Welfare Teaching Hospital, Medical City,
Baghdad, between 1999 and 2006.
Results : The age at time of diagnosis of LCH ranged from 3 months to 9 years, with a median of
22 months, and male to female ratio was 1:1.1. The duration of the onset of the disease before
diagnosis ranged from 1month to1 year. Bone lesions, skin lesions and LAP were the common
presenting features. Skull was the major site of lytic lesions 10(47.6%) patients. Tissue biopsy
and/or aspiration were the main diagnostic procedures. Twenty patients treated by different
combinations of chemotherapy. Ten patients survived (50%), and the mean time of follow up
was 28 months.
Conclusion : The study showed a relatively high incidence of advanced (III and IV) stages of
disease 12 patients (57.1 %) with subsequent poor outcome and survival.
Recommendation : Long term follow-up by a multidisciplinary care team is required


Article
Electron Microscopic Study of the Effects of Preeclampsia on the Placental Endothelial Cells Ultra Structures during Pregnancy

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Abstract

Background: Preeclampsia occurs in 3-5% of pregnancies and is a major cause (12-20 %) of maternal mortality in developed countries. It is the leading cause of preterm birth and intra-uterine growth restrictions (IUGR). Objective: The study was designed to determine and demonstrate the ultra structural changes of endothelial cells in placenta of women suffering from hypertensive disease. Patients & Methods: Placental samples were obtained from two groups of pregnant women groups (preeclamptic and normal pregnant women). The specimens were fixed in 2.5% gluteraldehyde and preceded for electron microscopic examination. Results: Placenta of women with preeclampsia has shown marked degenerative changes in both endothelial and trophoblastic cells. These changes were represented by precipitation of fibrin with the accumulation of platelets in capillary lumen. Abundance of collagen fibers precipitate in the apical region of both endothelial cells and trophoblasts, with thickening of endothelial basement membrane.Conclusion: All histological changes or lesions obstruct the continuous conduction from maternal surface of the trophoblasts through fetal capillary endothelium causing endothelial dysfunction.


Article
Improvement of solar cell efficiency by using Two mirrors V-trough concentrator
تحسين أداء الخلايا الشمسية باستخدام تصاميم جديدة لمركز حوضي مركب نوع V ثنائي المرايا المغطى بعدسات فرينيل

Author: علي هادي الحمداني
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2009 Volume: 27 Issue: 3 Pages: 126-130
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

V-trough concentrator with four mirrors has been designed and constructed. Itseffects on the silicon solar cell performance were studied with and with out coolingsystem. It was shown that the cell efficiency was increased from 11.94 % to 15.46 %with out cooling and from 13.3 % to 16.4 % with cooling system. The effect of acombination between Fresnel lens and V-trough concentrator was studied also. The solarcell efficiency was improved to 24 % with out cooling and the best efficiencyimprovement was 26.6% with cooling system.

ائي المرايا وتمت ( V-trough connectivity ) V تم تصميم وبناء مركز حوضي جديد نوعدراسة تأثيره على كافة معلمات تقييم أداء الخلية الشمسية السيليكونية في حالة عدم وجود نظام تبريد ووجوده,لوحظ إن كفاءة أداء هذه الخلية قد ازدادت من 11.94 % إلى 15.46 % بدون تبريد أما مع التبريد فقد ازدادتكفاءة الأداء من 13.3 % إلى 16.40 %. كما تمت دراسة تأثير الجمع بين أنواع مختلفة من عدسات فرينيل معهذا المركز على أداء الخلية الشمسية حيث تم الحصول على افضل أداء للخلية وقدره 24 %. بدون تبريد وعلىأفضل أداء مقداره 26.6 % بوجود نظام تبريد.


Article
AGE AND BIOPSY AS PREDICTIVE FACTORS IN THE MANAGEMENT OF ORAL SQUAMOUS CELL CARCINOMA….80

Author: Ali Abbas Alshawi
Journal: Basrah Journal of Surgery مجلة البصرة الجراحية ISSN: 16833589 / ONLINE 2409501X Year: 2010 Volume: 16 Issue: 1 Pages: 80-87
Publisher: Basrah University جامعة البصرة

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Abstract

Keywords

BIOPSY --- SQUAMOUS --- CELL --- CARCINOMA


Article
ISOLATION OF CYSTEINE AND METHIONINE
عزل طافرات العوز الغذائي الامينين والسستين والميثويين في بكتريا السينورايزوممليلوتي

Author: BASIL A. ABBAS باسل عبد الزهرة عباس
Journal: Basrah Journal of Veterinary Research. مجلة البصرة للابحاث البيطرية ISSN: 18138497 Year: 2006 Volume: 5 Issue: 1 Pages: 7-12
Publisher: Basrah University جامعة البصرة

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Abstract

Random 'l‘n5 mutagenesis produced 2l cysteine/methionine and 13 methionineau.'otrophic mutants of‘ Sinorliiznbimn me/1'/or/' strain Rmd20l. Linkage of Tn5 toauxotroph indicated that each mutant had a single 'l‘n5 insertion. All auxotrophshowed spontaneous reversion to prototrophy and they resembled the parental strainin production ofcell surface molecule and utilization of sugars and dicarboxylic acid.


Article
Mechanism of mitotic block and inhibition of cell proliferation by alkaloids extraction from Convolvulus Scammonia at low concentrations
ميكانيكية وقف الانقسام وتثبيط تكاثر الخلايا السرطانية CHO باستخدام القلويد المستخلص من نبات Convolvulus Scammonia بتراكيز واطئة

Authors: Ibrahim hade ابراهيم هادي محمد --- Zenia T.A زينة طه عبد
Journal: Diyala Journal For Pure Science مجلة ديالى للعلوم الصرفة ISSN: 83732222 25189255 Year: 2012 Volume: 8 Issue: 3 - part 2 Pages: 464-471
Publisher: Diyala University جامعة ديالى

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Abstract

Alkaloids extraction from Convolvulus Scammonia inhibited CHO cell line (china hamster) proliferation by inducing a sustained mitotic block at the metaphase/ anaphase boundary. Half-maximal inhibition of cell proliferation occurred at 8 nM alkaloids, and mitosis was half-maximally block 8 nM alkaloids.Inhibition of mitosis was associated with formation of an incomplete metaphase plate of chromosomes and an altered arrangement of spindle microtubules that strongly resembled the abnormal organization that occurs with low concentrations of vinblastine and other antimitotic compounds. No increase in microtubule polymer mass occurred below 10 nM alkaloids. The results indicate that alkaloids shares a common antiproliferative mechanism with vinblastine. At its lowest effective concentrations, alkaloids appears to block mitosis by kinetically stabilizing spindle microtubules and not by changing the mass of polymerized microtubule

صمم هذا البحث لدراسة تأثير المستخلص القلويدي الخام لنبات السقومانيا على النبيبات الدقيقة لخلايا الهامستر الصيني المعلمة GFP tubulin الطبيعية لدراسة التغيرات المحتملة عليها وذلك لأهميتها في الانقسام الخلوي للخلايا السرطانية اظهرت نتائج المعاملة الاولى بالمستخلص الخام لنبات السقومونيا قدرة المستخلص على وقف الانقسام الخلوي في الطور الاستوائي بالتركيز 8 nM وبالتالي التاثير على على النبيبات الدقيقة تثبيط الانقسام اقترن مع التغير في شكل النبيبات الدقيقة مشابه الى المركب الفانبلاستين وغيرها من المركبات المضادة للانقسام واعتمد اظهار التاثير على النبيبات الدقيقة للخلايا السرطانية على استخدام مجهر Immunofluroresence لا زيادة في كمية النبيبات عند التركيز 10 نانو مول من القلويد هذه النتيجة مشابها للفانبلاستين وان المعاملة بالتركيز الواطئ يوقف الانقسام من خلال وقف او تثبيت النبيبات ولا تغيير في شكلها ولا كميتها.


Article
CHROMIUM INHIBITS IN VITRO VIABILITY AND STEROIDOGENIC IN RAM LEYDIG CELLS

Author: Mohanad A. Al-Bayati
Journal: Basrah Journal of Veterinary Research. مجلة البصرة للابحاث البيطرية ISSN: 18138497 Year: 2017 Volume: 16 Issue: 2 Pages: 1-25
Publisher: Basrah University جامعة البصرة

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Abstract

One of an ecological hazardous agent Chromium; Cr (VI), The present experimentin vitro design to examine the mechanism of Leydig cell functions of Cr (VI) in ramtestis, Cr (VI) treated groups demising cell growth behavior of exponential phase wasupset of feeding time to Leydig cell in a dose-dependent manner, and inducedmitochondria-dependent ATP depletion and subsequently apoptosis. Cr (VI) effectmay be attributed, at least in part to DNA fragmentation increase DNA tail numberand tail length of COMET as compared with control group. Furthermore, theproperties of cell-specific regulation of cell membrane integrity had reduced anddeterminant cell concentration drop an.d reflected on the testosterone concentrationwere decreased as concentration-dependent manner, In conclusion, our results displaythe Cr (VI) is cytotoxic and impairs both viability and steroidogenic functions ofLeydig cells in ram testis via actually different pathway direct affecting of viabilityand indirect on steroidogenic activity, succeeding in testicular performance. However,the definite modes of action of harmfulness are not evidently unknown and must berechecked and studied in a different aspect

Keywords

Chromium --- Leydig cell --- DNA.


Article
Developing a Branch and Bound Algorithm for Cell Formation and Group Scheduling

Authors: Amjad B. Abdulghafour --- Dhulfiqar H. Dhayef
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 5 Part (A) Engineering Pages: 555-563
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Scheduling models for groups of parts have become more widely used in the industrial companies because of intensification of competition among them to get optimization in the delivery orders, reduce costs and increase quality. “Production scheduling is a meaning of verify a best or close to best achievement time plan for performing job, Production scheduling linked with the group technology applications is called Group Scheduling (GS). The objective of this research is to find optimum sequence of parts through cell formation and group scheduling. In this research, a lower bound for best possible Makespan is calculated by branch and bound algorithm and the best order of groups and parts generated. In this research, Branch and Bound algorithm was developed by the researcher to generate machine cell and part family then gathering groups to find sequence of groups as well as parts within it and calculate Makespan for problem”. The developed algorithm have been tested by case study consist of four products processed on nine machine, the results from examining and testing of the developed algorithm is three machine cell and part family (MC-1,MC-2 and MC-3) as well as optimal Makespan for MCs is(344,152,122).

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