Results 171 to 180 of about 463,836 (293)

When NCX switches sides: Experimental and computational insights into Ca2+ regulation in the heart

The Journal of Physiology, EarlyView.
Abstract figure legend Due to its presence inside the dyadic cleft, Na+/Ca2+ exchanger (NCX) builds a functional unit together with L‐type calcium channels and ryanodine receptors in the dyadic cleft. NCX acts bidirectionally (forward and reverse mode) dependent on extracellular calcium ([Ca2+]o) and sodium ([Na+]o) concentrations and the membrane ...
Wilhelm Neubert, Judith Hüttemeister, Paulina Sander, Nagaiah Chamakuri, Felix Hohendanner, Martin Falcke, Frank R. Heinzel   +6 more
wiley   +1 more source

Panoramic voltage‐sensitive optical mapping of contracting hearts using cooperative multiview motion tracking with 12 cameras

The Journal of Physiology, EarlyView.
Abstact figure legend A panoramic 3D optical mapping system was developed, enabling imaging of action potential waves across the entire strongly deforming ventricular surface of beating isolated hearts. The system comprises 12 high‐speed cameras and a soccerball‐shaped imaging chamber with 48 light‐emitting diodes (LEDs).
Shrey Chowdhary, Jan Lebert, Shai Dickman, Mason Manetta, Charles Gordon, Jan Christoph   +5 more
wiley   +1 more source

Combining quasi-one-dimensional modeling with region-wise structure analysis for rapid technology computer-aided design simulations of gate-all-around MOSFETs. [PDF]

Commun Eng
Lee KW, Kim IK, Jung SW, Jang MS, Hong SM.   +4 more
europepmc   +1 more source

Oxygen Attachment Dissociation of Protonated Reserpine and Its Analogs

Rapid Communications in Mass Spectrometry, Volume 40, Issue 14, 30 July 2026.
ABSTRACT Rationale Carbon–carbon double bonds are ubiquitous structural motifs in natural products and pose a key challenge in locating their presence in analytes via MS‐based methods. Here, we use the alkaloid reserpine as a model system to examine whether OAD reactions can locate quaternary double bonds embedded in fused multicyclic structures ...
Jack G. Li, Chris J. Bowen, Bun Chan, Adam W. E. Stewart, Hidenori Takahashi, Richard A. J. O'Hair   +5 more
wiley   +1 more source

Freeze-and-Release Direct Optimization Method for Variational Calculations of Excited Electronic States. [PDF]

J Chem Theory Comput
Schmerwitz YLA, Selenius E, Levi G.
europepmc   +1 more source

Nonlinear Model Order Reduction on Polynomial Manifolds for Computational Homogenisation Problems

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.
ABSTRACT Model order reduction (MOR) techniques utilising nonlinear approximation spaces can search for solutions to computational homogenisation problems on low‐dimensional approximation spaces. In combination with hyperreduction techniques, this allows for computations on representative volume elements (RVEs) to be accelerated by multiple orders of ...
Erik Faust, Lisa Scheunemann
wiley   +1 more source

Nonlinear Schwarz Preconditioning for Quasi-Newton Methods

We propose the nonlinear restricted additive Schwarz (RAS) preconditioning strategy to improve the convergence speed of limited memory quasi-Newton (QN) methods. We consider both "left-preconditioning" and "right-preconditioning" strategies. As the application of the nonlinear preconditioning changes the standard gradients and Hessians to their ...
openaire   +2 more sources

Experimental methods in chemical engineering: Atomic absorption spectrometry—AAS

The Canadian Journal of Chemical Engineering, Volume 104, Issue 5, Page 2206-2224, May 2026.
Abstract Elements absorb electromagnetic radiation (light) of a specific wavelength in proportion to the number of atoms in its path. As the atoms absorb this light energy, electrons rise from the ground state to an excited state. In atomic absorption spectrometry (AAS), high temperatures produce clouds of atoms from the sample (atomization) and ...
Emily Cintia Tossi de A. Costa, Jildimara de Jesus Santana, Viviane de Oliveira Campos, Felipe Fernandes Barbosa, Gregory S. Patience   +4 more
wiley   +1 more source

Damping factor estimation of damped complex sinusoidal signals using a maximum likelihood approach. [PDF]

Sci Rep
Karthikeyan A, Rahul AK, Tiwari R.
europepmc   +1 more source

Bridging Self‐Assessment Gaps: The Impact of Objective Structured Clinical Examination (OSCE) on Nursing Students' Competency Perception: A Pre‐Post‐Test Study

Nursing Open, Volume 13, Issue 5, May 2026.
ABSTRACT Aim Self‐assessment is critical in nursing education, enabling students to reflect on their cognitive and clinical skills while helping educators identify gaps in competencies. Combining subjective self‐assessment with the objectivity of Objective Structured Clinical Examinations (OSCEs) supports learning adjustments.
Virginia La Rosa‐Salas, Carmen Fernández‐Panadero, Miriam Pereira‐Sánchez, Miren Idoia Pardavila‐Belio, Marta Lizarbe‐Chocarro   +4 more
wiley   +1 more source