نتایج جستجو برای: samples were divided into three sections

تعداد نتایج: 5214360  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زبانهای خارجی 1392

to teach english adequately, qualified teachers are needed. unfortunately, there are still teachers who are teaching english without an academic degree in tefl. it is necessary for teachers to have a major in english to have subject knowledge, but it is not sufficient. teachers need to have an understanding of the social, cultural, moral, ethical, and pedagogical issues of education and practic...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1392

in this study, the relationship between teachers’ creative and critical thinking skills and their reflectivity in teaching was investigated. to this end, three questions were raised. these questions were intended to determine whether there was a significant relationship between teachers’ creative thinking skills and their reflectivity in teaching; whether there was a significant relationship be...

Journal: :journal of dentistry, tehran university of medical sciences 0
shahram mosharrafian zeynab sharifi

objectives: this study sought to compare the push-out bond strength of two bulk-fill and one conventional composite to intracanal dentin in primary anterior teeth. materials and methods: this in vitro, experimental study was conducted on 39 primary anterior teeth, which were randomly divided into three groups. after cleaning and shaping, the root canals were filled with metapex in such a way th...

Nowadays, identifying, determining the value and segmentation of customers is essential for a bank. Dynamic classification of workers' welfare bank customers and identification of their behavioral mobility between different departments in a specific period of time using data techniques Kaveh. In this regard, transaction data of customers of this bank was considered as a statistical community. I...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده فیزیک 1390

in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...

Journal: :iranian endodontic journal 0
mahdi tabrizizadeh yasin asadi aidin sooratgar saeed moradi hossein sooratgar fatemeh ayatolahi

introduction: endodontic treatment in pulpless immature teeth is challenging due to the lack of an apical stop. insertion of an apical plug is an alternative to conventional long-term apexification with calcium hydroxide. the aim of this study was to compare the apical microleakage of mineral trioxide aggregate (mta) and calcium-enriched mixture (cem) cement as apical plugs with three different...

Fereydoon Sargolzai Aval, Masood Shahraki Salar, Mohamad Reza Shahraki, Mohammad Ali Mashhadi, Mohammad Hassan Karimfar, Mohammad Reza Arab, Mohsen Mir,

Introduction: Cisplatin is an antineoplastic drug, which is widely used for the treatment of solid tumors. However, its clinical usage is limited because of its side effects such as hepatotoxicity. This study aimed to identify toxic effects of cisplatin on hepatocytes of rats. Methods: A total of 45 adult Sprague Dawley rats weighing 200±30 g were randomly divided into ex...

Mehri Fayazi, Mojdeh Salehnia, Saeideh Ziae,

Background: The aim of this study was to investigate the percentage of the stem cells population in human endometrial tissue sections and cultured cells at fourth passage. Methods: Human endometrial specimens were divided into two parts, one part for morphological studies and the other part for in vitro culture. Full thickness of human normal endometrial sections and cultured endometrial cells ...

Journal: :journal of occupational health and epidemiology 0
sz tabatabaei social determinant of health research center, dept. of social medicine, faculty of medicine, rafsanjan university of medical sciences, rafsanjan, iran.

background: ethical issues are essential components in any piece of research. in fact, they ought to be considered during designing, planning and conducting each research study particularly among the vulnerable. the aim of this paper is to describe and explain some of the ethical issues and challenges faced by a researcher who carried out a research in three malaysian residential homes. materia...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1393

the purpose of this study was to examine the comparative effect of story retelling and role playing on efl learners’ vocabulary learning and reading comprehension. to carry out the purpose of the study 90 female learners of tabarestan language school located in noshahr were non-randomly selected. they took pet test and among these 90 participants 62 students were selected as homogenous learners...

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