نتایج جستجو برای: stress state
تعداد نتایج: 1270498 فیلتر نتایج به سال:
Epidermal melanocytes are particularly vulnerable to oxidative stress owing to the pro-oxidant state generated during melanin synthesis, and to the intrinsic antioxidant defenses that are compromised in pathologic conditions. Melanoma is thought to be oxidative stress driven, and melanocyte death in vitiligo is thought to be instigated by a highly pro-oxidant state in the epidermis. We review t...
In this study, the effect of the tube material on the thermal stress generated in a vertical shell and tube heat exchanger is investigated. Shell and tube heat exchangers are the most common heat exchangers used in industries. One of the most common failures in these exchangers in the industry is the tube failure at the junction of the tube to tubesheet. When the shell side and the tube side fl...
Stress is the way that our body responds to something that is out of the normal. When we are under stress, our body makes chemical and physical changes to try to maintain it. Everyone responds to stressful status in their own way. Researches show anxiety and stress during pregnancy can have both immediate and long-term effects on her offspring. In addition, the emotional state of the pregnant m...
In early 2020, people around the world, beyond color, race, social class, nationality, or geography, have been plagued by a common problem called coronavirus and COVID-19. There is an increasing amount of anxiety, worry and stress around the world, and we are witnessing the death of dozens of people every hour. In the days when society is facing more than ever an unbalanced amount of misinforma...
Introduction: Myocardial perfusion imaging using gated SPECT and phase analysis is an effective tool in evaluation of mechanical dyssynchrony. The purpose of this study was to determine the normal ranges of global and regional phase parameters. Methods: A total of 100 patients with normal resting and stress electrocardiograms, low pretest likelihood for c...
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