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Testicular torsion in vivo models: Mechanisms and treatments
Andrology, 2023AbstractBackgroundTesticular torsion is a condition in which a testis rotates around its longitudinal axis and twists the spermatic cord. This in turn results in a significant decrease in blood flow and perfusion of testicular tissue. During Testicular torsion, the testicular tissue is affected by ischemia, heat stress, hypoxia, and oxidative and ...
Aram Minas +5 more
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Mechanisms of Injury in Unilateral Testis Torsion
European Urology, 1986We investigated the mechanisms of injury involved in unilateral testis torsion as well as the interventional effects of orchiectomy at 48 h and immunosuppression with corticosteroids in rats. Torsion was associated with abnormal contralateral testis histology and raised antilymphocytes and antisperm antibody titers.
S, Kogan +6 more
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Micro-Mechanical Measurement of the Torsional Modulus of DNA
Genetica, 1999The torsional modulus C of DNA is determined from the difference between the work of stretching a single overwound molecule and the work done in stretching one underwound by the same number of turns. The value obtained C/kBT = 86 +/- 10 nm is within the range (75 +/- 25 nm) estimated by more indirect methods.
T R, Strick, D, Bensimon, V, Croquette
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Torsional Vibrations in a Mechanical Drive
SAE Technical Paper Series, 1982<div class="htmlview paragraph">Torsional vibrations of an engine-powered hydraulic system were analyzed. The system consisted of: a diesel engine, spline shaft with clearance, universal joints, propeller shaft, mechanical transmission with clutch engagement, hydraulic pump, and a load. Excessive torsional vibrations resulted in propeller, spline
George R. Doyle, Lynn L. Faulkner
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Mechanisms of testicular torsion and potential protective agents
Nature Reviews Urology, 2014Testicular torsion is a urological emergency most commonly seen in adolescence, involving a decrease in blood flow in the testis resulting from torsion of the spermatic cord that can result in gonad injury or even loss if not treated in time. Testicular ischaemia-reperfusion injury represents the principle pathophysiology of testicular torsion, with ...
Ersagun, Karaguzel +2 more
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Torsional Buckling of Shafts Coupled By Mechanisms
Journal of Sound and Vibration, 1994Abstract The paper is concerned with torsional buckling of a system composed of two parallel shafts coupled together by two mechanisms. The motion of the system is described by a set of non-linear differential equations with coefficients which are periodic functions of displacements. Fixed points, closed orbits, homoclinic and heteroclinic orbits and
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The Relevance of Torsion to the Mechanical Derangement of the Lumbar Spine
Spine, 1981Cadaveric lumbar intervertebral joints were loaded simultaneously in torsion and compression, and load-deformation curves were obtained. These were repeated after each of the following structures were cut through in turn: the supra/interspinous ligaments, the apophyseal joint in compression, and the apophyseal joint in tension.
M A, Adams, W C, Hutton
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Algorithm for design of compliant mechanisms for torsional applications
2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2014Compliant mechanisms have been widely used in various mechatronics and robotics applications as they offer several significant advantages like repeatability and non-existence of backlash. The designs of these compliant mechanisms are often based on experience and intuition, and can be a frustrating experience during the design phase.
Zhuoqi Cheng +3 more
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Vibration Problems in Selected Torsional Mechanical Systems
Meccanica, 2003zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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[Pathophysiological mechanisms of torsion dystonia].
Patologicheskaia fiziologiia i eksperimental'naia terapiia, 1989Sixty-three patients were subjected to clinico-electrophysiological examination for precise definition of the features of pathogenesis of the tonic and clonic forms of generalized torsion dystonia. Stimulation electromyography was conducted by the generally accepted method with determination of the composition of motor neurons involved in the reflex ...
V V, Skupchenko, L P, Bogdanova
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