نتایج جستجو برای: stress effect
تعداد نتایج: 2006885 فیلتر نتایج به سال:
This paper presents a comprehensive model coupling the effects of hydrostatic stress, surface/interface stress, phase transformation and the structure of electrodes. First, the governing equation of moving phase interface with hydrostatic stress is established. Under the effect of hydrostatic stress, phase transformation process is much faster, which means phase transformation time is overestim...
The aim of this study was to determine the effects of water stress on the anatomy of xylem and phloem vessels, mesophyll and epidermal cells, relative water content and ion transfer rate of two wheat cultivars including Azar2 as drought tolerant and Shole as drought susceptible cultivars at four leaf stages. Seeds were sown in pots under normal (soil water content at 100% of FC) and the water s...
In order to study effect of the various levels of drought and salinity stress (0, -4, -8, -12, -16 bar) on morphological, physiological and biochemical traits of Atriplex halimus in seedling stage under hydroponic culture, two separated experiments were conducted as completely randomized design in three replications in hydroecology laboratory of Gonbad Kavous University...
Introduction: The effects of stimulation and inhibition of muscarinic acetylcholine receptors in the dorsal hippocampus on spatial learning and memory in male NMRI mice after acute stress were investigated. Materials and Methods: Animals were divided into two subsets of stress and non-stress. Each subset consisted of: saline, atropine (a muscarinic acetylcholine receptor antagonist) (1, 5, and ...
background : infertility causes psychological and emotional tension in the couples and makes severe stress on infertile men and women. relaxation technique is one of the methods that reduces the stress and can balance the human’s emotions. this study aimed to determine the effect of relaxation on the infertile women’s stress score. methods : this was a semi-experimental and clinical trial study...
In the present research, the mixed-mode fracture mechanics analysis in a plate with central hole under tensile loading is considered. It is assumed that a plate containing two symmetrical hole-edge cracks is bonded with two dissimilar planes. The stress intensity factors at the crack tips are calculated. The problem is modeled in Casca software and this model is analyzed with Franc software. Th...
The present study tested Abidin's (1992) parenting stress model in a sample of low-income African American fathers and their toddlers, specifically examining the mediation effect of fathers' engagement (self-report and observed) on the association between parenting stress and children's social competence and problem behavior. We found that fathers reported moderate levels of parenting stress, b...
the study of air infiltration into the buildings is important from several perspectives that may be noted to energy and design of hvac systems, indoor air quality and thermal comfort and design of smoke control systems. given the importance of this issue, an experimental and numerical study of air infiltration through conventional doors and windows has been explored in iran. to this end, at fir...
abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...
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