Results 121 to 130 of about 149 (149)
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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 ...
Zhang ShouRen, Cao Daiyong, LI XiaoMing
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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 ...
Zhang ShouRen, Cao Daiyong, LI XiaoMing
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Mechanical Stress Induced Mechanism of Microtubule Catastrophes
Journal of Molecular Biology, 2005Microtubules 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. +2 more
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Mechanical stress in phonation
Journal of Voice, 1994Mechanical 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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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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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, 2013Stress 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 ...
Helge Möllmann +5 more
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The Virial Stress Is Not a Measure of Mechanical Stress
MRS Proceedings, 2002AbstractThe virial stress is the most commonly used definition of stress in discrete molecular systems. This stress includes two parts. The first part depends on the mass and velocity of atomic particles, reflecting an assertion that mass transfer causes mechanical stress to be applied on stationary spatial surfaces external to an atomic particle ...
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2013
We shall continue now the theoretical study of the preceding chapter, by putting in evidence the stresses which arise because of the deformation of a solid body; both vector and tensor aspects of the stress are thus emphasized.
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We shall continue now the theoretical study of the preceding chapter, by putting in evidence the stresses which arise because of the deformation of a solid body; both vector and tensor aspects of the stress are thus emphasized.
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2013
Mechanical stress is developed in optical systems from various internal and external influences, including inertial, pressure, dynamic, temperature, and mechanical loads. Excessive stress can lead to permanent deformations of optical mounts and support structures by exceeding the yield strength of the material resulting in misalignments of optical ...
Gregory J. Michels +2 more
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Mechanical stress is developed in optical systems from various internal and external influences, including inertial, pressure, dynamic, temperature, and mechanical loads. Excessive stress can lead to permanent deformations of optical mounts and support structures by exceeding the yield strength of the material resulting in misalignments of optical ...
Gregory J. Michels +2 more
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2011
Bone has been known to adapt to mechanical stress (Amin 2010; Beier and Loeser 2010; Currey 2010; Temiyasathit and Jacobs 2010). The presence of mechanical stress increases bone mass and the absence of mechanical stress reduces bone mass. Bending of weight-bearing long bone increases pressure on the concave side and decreases it on the convex side ...
Masaki Noda +4 more
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Bone has been known to adapt to mechanical stress (Amin 2010; Beier and Loeser 2010; Currey 2010; Temiyasathit and Jacobs 2010). The presence of mechanical stress increases bone mass and the absence of mechanical stress reduces bone mass. Bending of weight-bearing long bone increases pressure on the concave side and decreases it on the convex side ...
Masaki Noda +4 more
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Pathogenetic Mechanisms of Stress
1997For a rational use of stress tests and an appropriate interpretation of their results, it may be useful to adopt a pathogenetic classification, taking into account the diagnostic end point of the test. Tests inducing vasospasm (ergonovine infusion and hyperventilation) explore the functional component. Tests trying to unmask coronary stenosis (exercise,
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