In this work we present the bulk-surface finite element method (BSFEM) for solving coupled systems of bulk-surface reaction–diffusion equations (BSRDEs) on stationary volumes. Such systems of coupled bulk-surface partial differential equations arise naturally in biological applications and fluid dynamics, for example, in modelling of cellular dynamics in cell motility and transport and diffusio...

Powder activated carbon surface (AC) was grinded and modified and altered procedure thorough a facile and easy chemical reaction to appearance of 2-((3silylpropylimino)1-methyl) phenol (AC- (SPIMP)). Subsequently, this novel sorbent efficiently applied for the extraction and preconcentration of some metal ions from real samples. Preliminary the influences of variables such as pH, amounts of rea...

The oxidation of small organic acids on noble metal surfaces under electrocatalytic conditions is important for the operation of fuel cells and is of scientific interest, but the basic reaction mechanisms continue to be a matter of debate. Formic acid oxidation on platinum is one of the simplest of these reactions, yet even this model system remains poorly understood. Historically, proposed mec...

a new hybrid nanomaterial was developed by immobilization of phosphomolybdate anions on the surface of modified magnetite nanoparticles with quaternary phosphonium cations. silica coated magnetic nanoparticles supported phosphonium cations, ph3p+-scmnps, were prepared by covalent attachment of chloropropylsilyl groups on the surface of silica coated magnetite nanoparticles and next reaction wit...

We consider the numerical simulation of coupled volume-surface reaction-diffusion systems having a detailed balance equilibrium. Based on the conservation of mass, an appropriate quadratic entropy functional is identified and an entropy-entropy dissipation inequality is proven. This allows us to show exponential convergence of solutions to equilibrium by the entropy method. We then investigate ...

In surgery simulation, most existing methods assume that the contact between a virtual instrument and a soft tissue model occur at a single point. However, there is a gross approximation when simulating laparoscopic procedures since the instrument shaft is used in several surgical tasks. In this paper, we propose a new algorithm for modeling the collision response of a soft tissue when interact...

Sung Sakong, Christian Mosch, Ariel Lozano, H. Fabio Busnengo, and Axel Groß ∗ Fakultät für Physik and Center for Nanointegration (CeNIDE), Universität Duisburg-Essen, D-47048 Duisburg/Germany Institut für Theoretische Chemie, Universität Ulm, D-89069 Ulm/Germany Instituto de F́ısica de Rosario, Consejo Nacional de Investigaciones Cient́ıficas y Técnicas (CONICET) and Universidad Nacional de Rosa...

Alkyne-modified biomolecules can be immobilized site- and chemoselectively on sulfonylazide slides under very mild conditions by means of the click sulfonamide reaction.

The interaction of triethoxysilane (TES) with H-ferrierite (H-FER) and its effects on acidity have been investigated by infrared spectroscopy. TES adsorbs only on the external surface of H-FER and allows the almost complete disappearance of the external silanol groups. New SiH groups are formed which appear to be inactive in acid-base interactions. The adsorption of propionitrile, which diffuse...