Results 291 to 300 of about 1,725,788 (328)

Stress — mechanisms of immunosuppression

Veterinary Immunology and Immunopathology, 1991
Stress, a term commonly used to describe varied phenomena, should be restricted to describe an adaptive response by an animal to threats to homeostasis. The threats to homeostasis are called stressors. Stressors include a variety of physical, psychological, chemical, or infectious causes that are modified by intrinsic and extrinsic factors. Examples of
J E, Dohms, A, Metz
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Mechanical Stress Induced Mechanism of Microtubule Catastrophes

Journal of Molecular Biology, 2005
Microtubules assembled in vitro from pure tubulin can switch occasionally from growing to shrinking states or resume assembly, an unusual behavior termed "dynamic instability of microtubule growth". Its origin remains unclear and several models have been proposed, including occasional switching of the microtubules into energetically unfavorable ...
Hunyadi, V., Chrétien, Denis, Janosi, I.   +2 more
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Mechanisms of memory under stress

Neuron, 2022
It is well established that stress has a major impact on memory, driven by the concerted action of various stress mediators on the brain. Recent years, however, have seen considerable advances in our understanding of the cellular, neural network, and cognitive mechanisms through which stress alters memory.
Schwabe, Lars, Hermans, Erno J., Joëls, Marian, Roozendaal, Benno   +3 more
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Influence of tectonic stress on coalification: Stress degradation mechanism and stress polycondensation mechanism

Science in China Series D: Earth Sciences, 2007
The function of pressure for coalification is a long-term controversial issue, and the main cause is that the strata pressure and the tectonic stress were confused, which are two different actions of “pressure”. The former benefits the physical coalification but retards the chemical coalification, whereas the latter may not only affect the physical ...
DaiYong Cao, XiaoMing Li, ShouRen Zhang
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Mechanical stress in phonation

Journal of Voice, 1994
Mechanical stress is always encountered in phonation. This includes tensile stress, shear stress, impact stress during collision, maximum active contractile stress in laryngeal muscles, inertial stress, and aerodynamic stress (pressure). Order of magnitude calculations reveal that tensile stress can reach the greatest value (near 1.0 MPa), contractile ...
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Cell differentiation by mechanical stress

The FASEB Journal, 2001
ABSTRACT Growth factors, hormones, and other regulatory molecules are traditionally required in tissue engineering studies to direct the differentiation of progenitor cells along specific lineages. We demonstrate that mechanical stimulation in vitro , without ligament ...
Gregory H, Altman, Rebecca L, Horan, Ivan, Martin, Jian, Farhadi, Peter R H, Stark, Vladimir, Volloch, John C, Richmond, Gordana, Vunjak-Novakovic, David L, Kaplan   +8 more
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Mechanical stress

2015
This chapter discusses mechanical stressors that are believed to be associated with work-related musculoskeletal disorders. It starts with an introduction to work-related musculoskeletal disorders (particularly those with high incidences in workplaces, such as disorders of low back, neck/shoulder, hand/wrist, elbow, and knee) in high-risk industries ...
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Mechanisms of Stress (Takotsubo) Cardiomyopathy

Heart Failure Clinics, 2013
Stress cardiomyopathy is a form of reversible systolic dysfunction of the mid and apical left ventricle with pathologic changes of the electrocardiogram in the absence of an obstructive coronary artery disease. The prevalence of stress cardiomyopathy among patients with symptoms suggestive of myocardial infarction is 0.7% to 2.5%, and it is found ...
Sebastian, Szardien, Helge, Möllmann, Matthias, Willmer, Yoshihiro J, Akashi, Christian W, Hamm, Holger M, Nef   +5 more
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