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alkej-223
Study Tensile Strength and Wear Rate for Unsaturated Polyester Resin and Nitrile butadiene Rubber Polymer Blend
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Abstract

    Binary polymer blend was prepared by mechanical mixing method of unsaturated polyester resin with Nitrile Butadiene Rubber (NBR) with different weight ratios (0, 5, 10 and 15) % of (NBR). Tensile characteristics and wear rates of these blends were studied for all mixing ratios. The microstructure of fracture surfaces of the prepared samples were investigated by optical microscope. The results were showed that strain rates of the resin material increase after blending it with rubber while the ultimate tensile strength and Young’s modulus values of it will decrease. It is also noticed that the wear rate of resin decreases with increasing of (NBR) content.

Keywords: Polymer Blend, Tensile Strength, Wear Rate, Unsaturated Polyester, NBR.

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Publication Date
Sun Jul 01 2018
Journal Name
المجلة الدولية للدراسات التربوية والنفسية
الخبرات الصادمة وعالقتها بالسلوك الفوضوي لدى عينة من طلبة المرحلة المتوسطة
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هدفت الدراسة إلى الكشف عن العالقة بين الخبرات الصادمة والسلوك الفوضوي لدى طلبة المرحلة المتوسطة فضال عن التعرف على الفروق بين الطلبة في الخبرات الصادمة والسلوك الفوضوي على وفق متغير النوع )الذكور- اإلناث(، تألفت عينة الدراسة من )185( طالباً وطالبة، وتم تطبيق مقياسا الدراسة على العينة- مقياس الخبرة الصادمة ومقياس السلوك الفوضوي وهما )من إعداد الباحثان(، وقد أسفرت نتائج الدراسة عن: - إن طلبة المرحلة المتوسطة أظهر

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Publication Date
Wed Mar 01 2023
Journal Name
Baghdad Science Journal
Minimum Neighborhood Domination of Split Graph of Graphs
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Let  be a non-trivial simple graph. A dominating set in a graph is a set of vertices such that every vertex not in the set is adjacent to at least one vertex in the set. A subset  is a minimum neighborhood dominating set if  is a dominating set and if for every  holds. The minimum cardinality of the minimum neighborhood dominating set of a graph  is called as minimum neighborhood dominating number and it is denoted by  . A minimum neighborhood dominating set is a dominating set where the intersection of the neighborhoods of all vertices in the set is as small as possible, (i.e., ). The minimum neighborhood dominating number, denoted by , is the minimum cardinality of a minimum neighborhood dominating set. In other words, it is the

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Publication Date
Sun Apr 04 2010
Journal Name
Journal Of Educational And Psychological Researches
Teaching Explanation Difficulties in Islamic University from the lecturers Point of View
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This study is about awareness of teaching explanation difficulties in the Islamic university from the lecturers point of view. It discussed the difficulties and the traditional teaching methods of explanation. The study concentrated on teaching Islamic studies in general and teaching explanation in specific and set difficulties so as to be treated.

            The study is of three chapters, the first contains the difficulties in several aspects like the educational goals, text contents, teaching methods and styles, students, educational techniques, educational aids and evaluation, it addition to the lecturers of Islamic university colleges in 2009-2

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Publication Date
Mon Jan 14 2019
Journal Name
Arab Science Heritage Journal
تقييد انزيم الاسبارجنيز (Asparginase) المنتج من بكتريا Bacillus subtilis المعزولة محلياً
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تم الحصول على 20عزلة من بكتريا Bacillus ، عزلت من مصادر غذائية ومائية مختلفة اختبرت قابلية العزلات على انتاج انزيم الاسبارجنيز وكانت العزلة Bacillus B1 هي الاغزر انتاجاً والتي شخصت على انها احدى سلالات B. subtilis.

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Publication Date
Sun Feb 28 2021
Journal Name
Journal Of Economics And Administrative Sciences
Enhancing national security through foreseeing the economic intelligence system in Iraq
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         Economic intelligence represents a modern field of knowledge that has been and is still the focus of many studies and research, including this research that deals with economic intelligence and its role in strengthening Iraqi national security - an analytical study. Economic development and economic development without security, and in a situation such as that of Iraq, which is still suffering from conflicts, conflicts and the effects of wars, as well as the unstable conditions in its regional environment, the directions of that relationship cannot be determined except through the availability of accurate information, indicators, full knowledge of reality and the pos

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Crossref
Publication Date
Sun Oct 03 2010
Journal Name
Journal Of Educational And Psychological Researches
دور المرشـد النفســي في المؤسسـات التعليمية لوقاية الشباب من آفة المخدرات
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تتنوع الإمراض التي تدعى بإمراض العصر وتتعقد باستمرار والتوازي مع تقدم البشرية في مجالات التطور العلمي والاجتماعي ومختلف مجالات الحياة الأخرى .

فبالإضافة  إلى الإمراض الفيروسية والعضوية والنفسية هناك مرض تعاطي وإدمان المخدرات (الهاشمي ,  2002  ، ص1).

لم يعد خافيا على احد إن خطر الإدمان على الكحول والمخدرات والمؤثرات العقلية أصبح اليوم يهدد امن وسلامة العديد من دول العالم

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Publication Date
Mon Jan 16 2023
Journal Name
Iraqi National Journal Of Nursing Specialties
Type 2 Diabetic Patients’ Knowledge Regarding Preventive Measures of Diabetic Foot
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Objective: Assess type 2 diabetic patients’ knowledge regarding preventive measures of diabetic foot. Find out the relationship between of type 2 diabetic patients’ knowledge regarding preventive measures of diabetic foot with certain sociodemographic characteristics

Methodology: A descriptive study was carried out from (2nd January 2022 to 26th March 2022).  A non –probability (purposive) sample of (60) adult patients who are diagnosed with type2 diabetes mellitus these patients have met the study criteria which was selected from Imam AL-Hussein Medical-City. The study instrument consist of two section: (Demographic Information Sheet, and Foot Care Outcome Expectation

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Publication Date
Sat Oct 01 2022
Journal Name
Al–bahith Al–a'alami
ADVERTISEMENTS IN THE CINEMA STARTING FROM THE MID 20TH CENTURY
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At the time when many important political events and evolutions took place, the cinema has been pretty active, and witnessed the historical events before and after the two world wars and the cold war. During the first half of the 20th century, the cinema had great interest from the major countries and their politicians, as well as the commercial turnout of large companies to invest in that field for the profits.  In the beginning of the 20th century, the major powers like the Soviet Union, the United States, Germany, Italy, England, and France started to compete in the development of their film industry and the investment of the new medium and the transformation of some famous works of fiction into films that perpetuate their cultur

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Crossref (1)
Crossref
Publication Date
Thu Jan 01 2009
Journal Name
Journal Of Educational And Psychological Researches
معنى الحياة وعلاقته بالسعادة لدى منتسبي جامعة بغداد من التدريسيين والموظفين
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      تطور اهتمام علم النفس في السنوات الأخيرة في الموضوعات التي تؤكد على ايجابية الشخصية الانسانية مثل مركز الضبط والتفاؤل والذكاء الانفعالي ومعنى الحياة Meaning of life  ، وتمثل مثل هذه الموضوعات نواة تيار او فرع في علم النفس يدعى بعلم النفس الايجابي او (البنَاء ) Positive Psychology  ، ويؤكد علم النفس الايجابي على ان تكون الحياة الداخلية للانسان اكثر عمقاً وثراءا

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Publication Date
Sun Dec 02 2018
Journal Name
Arab Science Heritage Journal
عقود عقود بيع عقارات من العصر البابلي القديم ق.م (2004-1595)
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The texts of the buying and selling are many and varied , diversity of materials movable and immovable property , especially in the old Babylonian period (2004-1595 BC.M) , movable materials are agricultural materials such as grain, various kinds and industrial products of animal such as leather , wool , etc., as well as slaves and the slave women which can

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