Dissertations / Theses on the topic 'Length Contraction'
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Almasri, Atheer. "MECHANICAL BEHAVIOR AND LENGTH ADAPTATION OF RABBIT BLADDER SMOOTH MUSCLE." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1967.
Full textPulcastro, Hannah C., Peter O. Awinda, Mei Methawasin, Henk Granzier, Wenji Dong, and Bertrand C. W. Tanner. "Increased Titin Compliance Reduced Length-Dependent Contraction and Slowed Cross-Bridge Kinetics in Skinned Myocardial Strips from Rbm20ΔRRM Mice." FRONTIERS MEDIA SA, 2016. http://hdl.handle.net/10150/621415.
Full textSagit, Rauan. "Variation in length of proteins by repeats and disorder regions." Doctoral thesis, Stockholms universitet, Institutionen för biokemi och biofysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-88553.
Full textAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: In press. Paper 4: Manuscript.
Nordlund, Maria M. "On spinal mechanisms for reflex control in man : modulation of Ia-afferent excitation with changes in muscle length, activation level and fatigue /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-821-1/.
Full textTillin, Neale A. "The influence of training and athletic performance on the neural and mechanical determinants of muscular rate of force development." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8524.
Full textKluka, Virginie. "Etude des propriétés neuromusculaires chez l'enfant : approche par la stimulation magnétique périphérique." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22649/document.
Full textThe purpose of this PhD thesis was to compare the contribution of the maximal voluntary activation level (VA) of the motor units to force production differences between children and adults in various mechanical conditions that affect force production (muscle length, contraction mode and velocity), and in fatigue condition. Thirty one pre-pubertal 8 to 12-year old boys and 37 men (18-30 years) were recruited and allocated into the 3 studies ofthis project. The first study was devoted to compare the effects of muscle length and fatigue on the VA and force generating capacity of the knee extensors between children and adults. In the second study, we compared the effects of muscle length on the VA and force generating capacity of the plantar flexors between children and adults. The third study analysed the effect of contraction mode and velocity on the VA and force generating capacity of the knee extensors between children and adults. Neuromuscular properties were assessed with peripheral magnetic stimulation and maximal voluntary contractions. Results showed a higher VA of the knee extensors in adults at long muscle length (90° and 100° knee flexion) but no difference between children and adults at short length (20° knee flexion; study 1). However, the VA of the plantar flexors was not affected by muscle length changes whatever the age group considered (study 2). Results also showed a higher VA in isometric mode compared to eccentric and concentric conditions whatever the age group (study 3). However, the effect of this VA reduction on force generating capacity differed between groups, a concomitant force reduction being observed in adults, but not in children. Finally, we observed a greater VA reduction and therefore greater central fatigue in children during the fatiguing protocol (study 1). A relative immaturity and the particular musculo-tendinous properties of children (higher compliance) may account for the reported results
WANG, YUJEN. "SOFT POLYELECTROLYTE HYDROGEL AS VERSATILE MATERIAL IN DIFFERENT APPLICATION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1469459792.
Full textKosterina, Natalia. "Muscular force production during non-isometric contractions : towards numerical muscle modeling /." Licentiate thesis, Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10672.
Full textPun, Clara. "History-dependent properties of skeletal muscle myofibrils contracting along the ascending limb of the force-length relationship." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:8881/R/?func=dbin-jump-full&object_id=92265.
Full textLiu, Jeffrey Chao-Yu. "Length distribution of myosin filaments in smooth muscle and implications in the structure and function of contractile units." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52272.
Full textMedicine, Faculty of
Medicine, Department of
Experimental Medicine, Division of
Graduate
Sharifnezhad, Ali. "Longitudinal adaptation of vastus lateralis muscle in response to eccentric exercise." Doctoral thesis, Humboldt-Universität zu Berlin, Philosophische Fakultät IV, 2014. http://dx.doi.org/10.18452/16918.
Full textThe present study investigated the effects of magnitude, velocity and muscle length at which the eccentric stimulus is applied on the longitudinal adaptation of the vastus lateralis muscle (VL). The 31 participants were randomly assigned into two experimental groups to perform 30 sessions of eccentric training for the knee extensors (3 times/week) and one control group. The first experimental group (n=10) exercised one leg at 65% of maximum voluntary isometric contraction (MVC) and the second leg at 100% MVC at 90°/s from 25° to 100° knee angle on an isokinetic device (Biodex 3). The second experimental group (n=10) exercised one leg at 100% MVC at 90°/s from 25° to 65° knee angle and the other leg at 100% MVC at an angular velocity of 240°/s from 25° to 100° knee angle. In pre and post measurements the fascicle length of the VL was examined by ultrasonography and the moment-angle and power-angular velocity relationship of the knee extensors with a dynamometer. The results showed an increase (p
Ekstrand, Mathias. "The effects of muscle damaging electrically stimulated contractions and ibuprofen on muscle regeneration and telomere lengths in healthy sedentary males." Thesis, Örebro universitet, Institutionen för hälsovetenskap och medicin, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-27906.
Full textBorrani, Fabio. "Mécanismes de la cinétique de la composante lente de VO2 chez l'homme : hypothèse d'un recrutement de fibres rapides." Montpellier 1, 2002. http://www.theses.fr/2002MON14001.
Full textGARCIA, LUIS. "Implication du canal ca#2#+ lent dans le couplage excitation-contraction du muscle squelettique : etude d'une mutation murine spontannee affectant ce couplage." Paris 7, 1989. http://www.theses.fr/1989PA077057.
Full textGauthier-Erfanian, Chantal. "Modulation bêta-adrénergique du courant entrant lent calcique et de la contraction phasique de la fibre atriale de grenouille : intervention d'un mécanisme indépendant de l'AMPc." Poitiers, 1991. http://www.theses.fr/1991POIT2259.
Full textSol-Rolland, José. "Les sulfone indolizines : caractérisation et purification de leur site de liaison associé au canal calcique lent voltage-dépendant du muscle squelettique de babouin." Montpellier 2, 1991. http://www.theses.fr/1991MON20097.
Full textMartin, Christine. "Etude in situ de l'action des hormones thyroi͏̈diennes sur la réponse contractile et le métabolisme énergétique de muscles lents et rapides chez le rat : investigation par spectroscopie de RMN du proton et du phosphore 31." Aix-Marseille 1, 1990. http://www.theses.fr/1990AIX11310.
Full textFerrás, Luís Jorge Lima. "Theoretical and numerical studies of slip flows." Doctoral thesis, 2012. http://hdl.handle.net/1822/22933.
Full textThis thesis presents an intensive study on slip flows of Newtonian and Non-Newtonian fluids carried out both analytically and numerically. Industrial applications of these flows are found in classical industries such as in polymer processing (for instance in extrusion) and in more modern applications as in lab-on-chip devices. Analytical solutions for flows under slip, are presented for both Newtonian, inelastic Newtonian and Non-Newtonian flows. These analytical solutions were missing in the literature and are helpful for both theoretical analysis and computer code validation. Slip boundary conditions were implemented in a computational fluid dynamics code, based on the finite volume method framework. New techniques for their implementation were devised, allowing to obtain convergence for reasonable Weissenberg numbers, using an appropriate iterative procedure to couple velocity, pressure and stress. The numerical code was then used to simulate benchmark problems, such as the 4:1 contraction, 1:4 expansion and slip-stick flows under slip, usually found in polymer processing.. The theoretical study of development length for Newtonian and viscoelastic fluids was performed for a channel flow under slip. New correlations for predicting the development length in micro and macro channels were devised. Other part of these thesis was dedicated to the theoretical study of electro-osmotic flows of complex fluids, for which analytical solutions for simple flows under the influence of the linear and nonlinear Navier slip boundary conditions were devised.
Nesta tese é apresentado um estudo intensivo de escoamentos com escorregamento, envolvendo fluidos newtonianos e não-newtonianos. Este tipo de escoamentos pode ser encontrado na indústria, por exemplo no processo de extrusão e ainda em aplicações mais modernas, tais como aparelhos baseados no conceito “lab-on-chip”. São apresentadas soluções analíticas com escorregamento para fluidos newtonianos, e diversos fluidos não-newtonianos, tanto inelásticos como viscoelásticos. Estas soluções analíticas não existiam na literatura e são úteis tanto em termos teóricos assim como para a validação de códigos numéricos. As condições de fronteira de escorregamento foram implementadas num código numérico de mecânica dos fluidos computacional baseado no métodos dos volumes finitos. Foram desenvolvidas novas técnicas para a implementação destas condições de fronteira, permitindo obter convergência para valores razoáveis do número de Weissenberg, usando um processo iterativo para acoplar os campos de velocidades, pressões e tensões. Este código numérico foi depois usado para simular problemas de referência, tais como os escoamentos numa contracção súbita 4:1, numa expansão 1:4 e o escoamento “slip-stick”, sob a influência do escorregamento na parede. Estas geometrias são frequentemente utilizadas em processamento de polímeros, o que substancia a utilidade prática destas simulações. Foi feito um estudo numérico e teórico para descobrir o comprimento de desenvolvimento do escoamento num canal simples com escorregamento na parede, de fluidos newtonianos e viscoelásticos. Foram ainda propostas novas correlações para prever esse comprimento. Outra parte do trabalho foi dedicada ao estudo de electro-osmose, onde novas soluções analíticas para escoamentos simples sob a influência do modelo de escorregamento linear de Navier, são apresentadas.
Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/37586/2007
Fundo Social Europeu Europeu (FSE) - Human Potential Operational Programme
Patino, Descovich Carlos. "Characterizing cortical myosin mini-filament regulation, length and its macroscopic implications in cytokinetic dynamics." Thèse, 2013. http://hdl.handle.net/1866/11328.
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