Results 351 to 360 of about 7,453,208 (377)
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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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Stresses in Redundant Mechanisms
Journal of Applied Mechanics, 1970The methods of classical kinematics and of structures are combined to determine the internal loads acting on the members of a statically indeterminant mechanism. The effect of manufacturing tolerances on stresses is investigated. For example, end play in a crank bearing caused the bending stress in a connecting rod to increase by a factor of 13.7 for ...
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Electromigration and mechanical stress
Microelectronic Engineering, 1999Abstract The state of the art in the understanding of electromigration failure and mechanical stress is reviewed. First, the important concepts are introduced the effects of thermal stress and the presence of a refractory underlay is shown. Following a simplified way of qualitatively assessing the effect of various geometries on electromigration is ...
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Cell differentiation by mechanical stress
The FASEB Journal, 2001Growth 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-selective exogenous growth and differentiation factors, induces the differentiation of ...
Gregory H. Altman +8 more
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Pathogenetic Mechanisms of Stresses
1992For 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 (Fig. 1). Tests trying to unmask coronary stenosis (
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Stress Mechanisms and Metabolic Complications
Hormone and Metabolic Research, 2007Stress can be defined as a state of threatened homeostasis or disharmony. An intricate repertoire of physiologic and behavioral responses is mobilized under stressful situations forming the adaptive stress response that aims to reestablish the challenged body equilibrium. The hypothalamic-pituitary-adrenal axis and the central and peripheral components
Constantine Tsigos, Ioannis Kyrou
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Fluid Mechanical Stress and the Platelet
Thrombosis and Haemostasis, 1975SummaryPlatelet thrombi in suspensions stirred in an aggregometer or subjected to shear flow in a Couette viscometer or circular tube can only form as a result of collisions between the cells. In whole blood, the presence of the red cells results in pronounced lateral displacements of the paths of the platelets through the vessel, which in turn ...
Jean Marlow +2 more
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Chemical Society Reviews, 2014
In this review, we focus on the types of smart supramolecular gels whose self-assembly processes are affected or even triggered by physical forces including sonication and mechanical stress (mechanical force).
Xudong Yu +3 more
semanticscholar +1 more source
In this review, we focus on the types of smart supramolecular gels whose self-assembly processes are affected or even triggered by physical forces including sonication and mechanical stress (mechanical force).
Xudong Yu +3 more
semanticscholar +1 more source
microRNAs and Mechanical Stress
2011Mechanical stress, one of the major abiotic stresses, significantly affects plant growth, survival, and reproduction. Recent studies showed that cytoplasmic calcium, reactive oxygen species, and phytohormones play important roles in mechanosensing and subsequent anatomical and morphological changes in plants exposed to mechanical stress. A large number
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Achieving reversibility of ultra-high mechanical stress by hydrogen loading of thin films
, 2015Nano-materials are commonly stabilized by supports to maintain their desired shape and size. When these nano-materials take up interstitial atoms, this attachment to the support induces mechanical stresses.
M. Hamm, V. Burlaka, S. Wagner, A. Pundt
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