https://puma.ub.uni-stuttgart.de/group/simtech/layerPUMA RSS feed for /group/simtech/layer2026-04-23T02:55:50+02:00https://puma.ub.uni-stuttgart.de/bibtex/2f3d78410850201349b3420cb0f71115a/inspo5inspo52022-07-19T11:10:29+02:00Stomach Uniaxial Force experiments velocity length layer relationship muscle Contractile Separated tensile wall Organ properties <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mischa Borsdorf" itemprop="url" href="/person/1b79cfd3a81cd8360cba0a6d4729f7452/author/0"><span itemprop="name">M. Borsdorf</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Böl" itemprop="url" href="/person/1b79cfd3a81cd8360cba0a6d4729f7452/author/1"><span itemprop="name">M. Böl</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/1b79cfd3a81cd8360cba0a6d4729f7452/author/2"><span itemprop="name">T. Siebert</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Pflugers Arch</span>, </em> </span>(<em><span>June 2021<meta content="June 2021" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022Pflugers Arch06911-920Influence of layer separation on the determination of stomach smooth muscle properties.4732021Stomach Uniaxial Force experiments velocity length layer relationship muscle Contractile Separated tensile wall Organ properties Uniaxial tensile experiments are a standard method to determine the contractile properties of smooth muscles. Smooth muscle strips from organs of the urogenital and gastrointestinal tract contain multiple muscle layers with different muscle fiber orientations, which are frequently not separated for the experiments. During strip activation, these muscle fibers contract in deviant orientations from the force-measuring axis, affecting the biomechanical characteristics of the tissue strips. This study aimed to investigate the influence of muscle layer separation on the determination of smooth muscle properties. Smooth muscle strips, consisting of longitudinal and circumferential muscle layers (whole-muscle strips [WMS]), and smooth muscle strips, consisting of only the circumferential muscle layer (separated layer strips [SLS]), have been prepared from the fundus of the porcine stomach. Strips were mounted with muscle fibers of the circumferential layer inline with the force-measuring axis of the uniaxial testing setup. The force–length (FLR) and force–velocity relationships (FVR) were determined through a series of isometric and isotonic contractions, respectively. Muscle layer separation revealed no changes in the FLR. However, the SLS exhibited a higher maximal shortening velocity and a lower curvature factor than WMS. During WMS activation, the transversally oriented muscle fibers of the longitudinal layer shortened, resulting in a narrowing of this layer. Expecting volume constancy of muscle tissue, this narrowing leads to a lengthening of the longitudinal layer, which counteracted the shortening of the circumferential layer during isotonic contractions. Consequently, the shortening velocities of the WMS were decreased significantly. This effect was stronger at high shortening velocities.https://puma.ub.uni-stuttgart.de/bibtex/243c7d8d7611bdcf9c01955ccd18e1576/inspo5inspo52022-07-19T11:10:29+02:00tension Biaxial experiments staining Layer specific Tissue muscle testing Smooth Microstructure <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Robin Trostorf" itemprop="url" href="/person/11c551a3d7362260e9dc45aeb1d271fa4/author/0"><span itemprop="name">R. Trostorf</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Enrique Morales-Orcajo" itemprop="url" href="/person/11c551a3d7362260e9dc45aeb1d271fa4/author/1"><span itemprop="name">E. Morales-Orcajo</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tobias Siebert" itemprop="url" href="/person/11c551a3d7362260e9dc45aeb1d271fa4/author/2"><span itemprop="name">T. Siebert</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Böl" itemprop="url" href="/person/11c551a3d7362260e9dc45aeb1d271fa4/author/3"><span itemprop="name">M. Böl</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of the Mechanical Behavior of Biomedical Materials</span>, </em> </span>(<em><span>March 2021<meta content="March 2021" itemprop="datePublished"/></span></em>)</span>Tue Jul 19 11:10:29 CEST 2022Journal of the Mechanical Behavior of Biomedical Materials03104275Location- and layer-dependent biomechanical and microstructural characterisation of the porcine urinary bladder wall1152021tension Biaxial experiments staining Layer specific Tissue muscle testing Smooth Microstructure https://puma.ub.uni-stuttgart.de/bibtex/2769be1510640e0e78e217c26c4dffbb5/mhartmannmhartmann2018-07-20T10:54:15+02:00Nonlinear domain, Brinkman boundary problem, Layer 76M Lipschitz 42B20, Stokes 46E35, 35J25, and value vorlaeufig potential operators, 76D, <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mirela Kohr" itemprop="url" href="/person/1d6d8c49bb72357b5a9ac7fe494eb266e/author/0"><span itemprop="name">M. Kohr</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Massimo Lanza de Cristoforis" itemprop="url" href="/person/1d6d8c49bb72357b5a9ac7fe494eb266e/author/1"><span itemprop="name">M. Lanza de Cristoforis</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang L. Wendland" itemprop="url" href="/person/1d6d8c49bb72357b5a9ac7fe494eb266e/author/2"><span itemprop="name">W. Wendland</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Potential Analysis</span>, </em> </span>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018Potential Analysis1123-1171Nonlinear Neumann-Transmission Problems for Stokes and Brinkman Equations on Euclidean Lipschitz Domains382013Nonlinear domain, Brinkman boundary problem, Layer 76M Lipschitz 42B20, Stokes 46E35, 35J25, and value vorlaeufig potential operators, 76D, https://puma.ub.uni-stuttgart.de/bibtex/2dc38376bf7860c4fe03db35f36425dd6/mhartmannmhartmann2018-07-20T10:54:15+02:00Brinkman compact Besov problem, Dirichlet-transmission domains, Riemannian Lipschitz layer spaces. and manifolds, Pseudodifferential Sobolev vorlaeufig potential operators, <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Kohr" itemprop="url" href="/person/14b459931efee9dae6b660e7e30dbf7a3/author/0"><span itemprop="name">M. Kohr</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="C. Pintea" itemprop="url" href="/person/14b459931efee9dae6b660e7e30dbf7a3/author/1"><span itemprop="name">C. Pintea</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang L. Wendland" itemprop="url" href="/person/14b459931efee9dae6b660e7e30dbf7a3/author/2"><span itemprop="name">W. Wendland</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik</span>, </em> </span>(<em><span>2013<meta content="2013" itemprop="datePublished"/></span></em>)</span>Fri Jul 20 10:54:15 CEST 2018ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift f{\"u}r Angewandte Mathematik und Mechanik446-458Dirichlet-transmission problems for pseudodifferential Brinkman operators on Sobolev and Besov spaces associated to Lipschitz domains in Riemannian manifolds932013Brinkman compact Besov problem, Dirichlet-transmission domains, Riemannian Lipschitz layer spaces. and manifolds, Pseudodifferential Sobolev vorlaeufig potential operators, In this paper we use a layer potential analysis to show the existence of solutions for a Dirichlet-transmission problem for pseudodifferential Brinkman operators on Sobolev and Besov spaces associated to Lipschitz domains in compact boundaryless Riemannian manifolds. Compactness and invertibility properties of corresponding layer potential operators on Lp, Sobolev, or Besov scales are also obtained.