نتایج جستجو برای: stress effect

تعداد نتایج: 2006885  

Journal: :journal of solid mechanics 0
r ghajar department of mechanical engineering, k.n. toosi university ,tehran, iran s peyman department of mechanical engineering, k.n. toosi university ,tehran, iran j sheikhi department of civil engineering ,razi university , kermanshah, iran m poorjamshidian department of mechanical engineering, kashan university ,kashan, iran

in this paper, the interface crack of two non-homogenous functionally graded materials is studied. subsequently, with employing the displacement method for fracture of mixed-mode stress intensity factors, the continuous variation of material properties are calculated. in this investigation, the displacements are derived with employing of the functional graded material programming and analysis o...

Journal: :avicenna journal of phytomedicine 0
mahin dianat physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran negin amini physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran mohammad badavi physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran yaghoub farbood physiology research center and department of physiology, faculty of medicine, ahvaz jundishapur university of medical sciences, ahvaz, iran

objective: in ventricular arrhythmias, due to their free radical scavenging action, antioxidant agents are usually used in the treatment of cardiovascular disease. since stress is considered as risk factor for increased mortality by causing malignant arrhythmias, the study was designed to evaluate the cardioprotective effects of ellagic acid (ea) on cacl2-induced arrhythmias in rat stress model...

Journal: :علوم گیاهان زراعی ایران 0
فریده نوروزی شهری دانشجوی کارشناسی ارشد گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه زنجان مجید پوریوسف استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه زنجان افشین توکلی استادیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه زنجان جلال صبا دانشیار گروه زراعت و اصلاح نباتات، دانشکدۀ کشاورزی، دانشگاه زنجان علیرضا یزدی نژاد استادیار گروه فارماکوگنوزی، دانشکدۀ داروسازی، دانشگاه علوم پزشکی زنجان

in order to evaluate the effect of drought stress on grain yield and its components of fennel accessions, a field experiment was conducted as a split plot based on complete randomized block design with three replications. this experiment was conducted in research farm of agricultural faculty of zanjan university in 2012. in this study water stress in two levels included control and drought stre...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1391

this study sought to examine the effect of cooperative game on iranian students achievements in english alphabet learning. cooperative games are games, in which players or teams work together towards a common goal without defeating someone. the methodology used in this study was experimental. the population of the study was 60 female students from the grade one in secondary school in tabriz, ir...

Morad Shaban, Morteza Shamsizadeh Zahra Rahmati Motlagh,

Objective: Drought stress is most important factor which reduce root and shoot growth in crops. This study was performed in order to evaluate the effects of drought stress and Zn fertilizer on root traits of four cultivars of chickpea. Methods: Experiment was laid out in a split plot-factorial using randomized complete block design with three replications. Drought stress treatment stand in main...

Background & Objective: Many anti stress drugs have a lot of side effects on learning. The aim of this study was to compare the effect of Rosemary plant and Alprazolam on learning under stress conditions in laboratory mice. Materials & Methods: In this experimental study, 60 adult female rats were used. In order to investigate the learning capacity under stress conditions, the rats were divided...

Due to the complex geometry and thermos-mechanical loading, cylinder heads are the most challenging parts among all parts engines. They must endure cyclic thermal and mechanical loading throughout their lifetime. Cast aluminum alloys are normally quenched after solution treatment process to improve aging responses. Rapid quenching can lead to high residual stress. Residual stress is one of the ...

Journal: :مجله دانشکده پزشکی دانشگاه علوم پزشکی تهران 0
نعمت الله خوانساری n khonsari پرویز جعفری p jafari جان دوکان j dukan

we have studied the effect of amitriptyline, a tricyclic anti-depressant drug on several immune parameters of the balb/c mice in order to evaluate its immunomodulatory effects. results showed that amitriptyline will potentiates all of the immunocytes functions except for the production of pge2 by lps stimulated monocytes. we have also showed that amitriptyline can normalize the immunosuppressiv...

Introduction: This study was devoted to investigating the effect of stress on visual selective attention according to Extraversion (E) moderating effect. Method: The sample group was selected with respect to neuropsychological control variables by multi-session random sampling from unmarried male Tehran universities’ students (60 subjects in three equal groups (20 subjects in each group) two ...

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