نتایج جستجو برای: stress reaction
تعداد نتایج: 837435 فیلتر نتایج به سال:
As animals respond to environmental stress with a set of default reactions described as the "fight-or-flight" response, so do epithelial and endothelial cells when they are confronting stressors in their microenvironment. This review will summarize a growing body of data suggesting the existence of a set of stereotypical cellular reactions to stress, provide some examples of diseases that are c...
Change has become inevitable and a dominant aspect within organisations. As organisations are increasingly involved in change, many approaches to organisational change exist. However, the impact of change on the individual and the reality of elevated stress levels during periods of organisational change is often disregarded. Within this context, creating meaningful and sustainable change remain...
The behaviour of energetic solids subjected to simple shear loading is modelled to predict ignition. The model is transient, one dimensional and includes effects of thermal diffusion, plastic work and exothermic reaction with one-step irreversible Arrhenius kinetics. A common power-law constitutive model for shear stress which accounts for strain hardening, strain-rate hardening and thermal sof...
Meditation is a common practice in certain religions. Non religion meditation practice is now more and more popular. Meditation can provide a stress relief method via relaxation reaction. It can enhance parasympathetic tone and suppress sympathetic tone. Sympathetic nerve system is a fear-and-fight stress machinery accompanying steroid secretion. Majority of anxiety and depression patients are ...
Cancer treatment is still of the greatest challenges that health care providers and patients are facing. One of the unsolved problems in cancer treatment is cells' reaction to metabolic stress caused by harsh nutritional conditions around tumor. In order to be able to treat this disease properly, it is important to understand the true nature of the disease. In fact, the cells inside the central...
Subsurface mineralization of CO2 by injection into (hydro-)fractured peridotites has been proposed as a carbon sequestration method. It is envisaged that the expansion in solid volume associated with the mineralization reaction leads to a build-up of stress, resulting in the opening of further fractures. We performed CO2-mineralization experiments on simulated fractures in peridotite materials ...
In a study on metabolic consumption of photosynthetic electrons and dissipation of excess light energy under water stress, O2 and CO2 gas exchange was measured by mass spectrometry in tomato plants using 18O2 and 13CO2. Under water stress, gross O2 evolution (E(O)), gross O2 uptake (U(O)), net CO2 uptake (PN), gross CO2 uptake (TPS), and gross CO2 evolution (Ec) declined. The ratio P(N)/E(O) fe...
Background: High level of perceived stress in nurses is due to a genetic predisposition and environmental stressors. The aim of NURSE (Nursing Unacquainted Related Stress Etiologies) study was to investigate the association of C677T MTHFR gene polymorphism and stress perception among nurses. Methods: In this comprehensive study, 216 female nurses were recruited. Perceived stress w...
This study examines the immune responses against some stress proteins of Mycobacterium leprae in leprosy patients with and without leprosy reactions. Leprosy patients showed a higher level of antibodies to all antigens compared to healthy controls. The antibody response to 18kDa antigen was significantly higher in patients with Type 1 reaction compared to those of TT or borderline patients with...
The fluid mechanical stress-induced piezoelectric effect could remarkably boost the 2e ? oxygen reduction reaction (ORR) performance of PZT ceramics during dynamic operation.
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