Abstract A concise and accurate prediction method is required for membrane permeability in chemical engineering biological fields. As a preliminary study on this topic, we propose the concentration polarization model (CPM) of permeate flux flow rate under dominant effects viscosity solute diffusion. In model, incorporated solution through semi-permeable (i.e., permeable solvent but not solute) ...

Two-dimensional capsule-substrate adhesion under an imposed Stokes flow field is numerically simulated by using the immersed interface method (IIM) with the same viscosity for the fluid enclosed by the membrane and the surrounding fluid. The capsule membrane is considered to be either impermeable or permeable while the capsule membrane is assumed to be Neo-Hookean. The interaction between the c...

There are many organic ions inside the cell which do not leak out of the cell membrane. This creates excess osmotic pressure for the inside of the cell. Since the membrane is permeable to water and is not mechanically strong enough to withstand significant osmotic pressure differences, the cell cannot maintain its volume and will tend to burst. Depending on the organism, there are three ways to...

Porous permeable films materials have very broad prospects in the treatment of sludge-containing waste water due to their large surface area and good microfiltration. In this work, highly ordered porous membranes have been prepared successfully on ice substrates using a poly(phenylene oxide) (BPPO)-SiO₂ nanoparticle (NP) mixture by the brePorous permeable films materials have very broad prospec...

The skeletal muscle membranes of these reptiles are found to exhibit membrane potentials, as being permeable to Na+, K+ and Cl– [4-7]. These muscle cell membrane electrical potentials/ characteristics have been divided into active and passive categories; the passive electrical characteristics show some thermal dependency in different species of the animals [8,9]. As the, passive electrical prop...

1. The electromotive forces which arise, if two electrolyte solutions are separated from each other by a layer of any kind, are discussed. A general equation is derived comprising the known equations for diffusion, partition, and membrane (Donnan) potentials as special cases. 2. A method is proposed to analyse membranes potentiometrically with respect to their cation or anion selectivity, their...

One critical step of apoptosis is the release of mitochondrial proteins through the outer mitochondrial membrane. Recent work shows that two pro-apoptotic Bcl-2 family proteins, Bax and Bid, as well as the mitochondrion-specific lipid cardiolipin may cooperate in chemically defined liposomes to generate a protein-permeable conduit, relaunching the debate on the identity of the pore responsible ...

We report the in situ generation of pH gradients in microfluidic devices for biofabrication of freestanding, semi-permeable chitosan membranes. The pH-stimuli-responsive polysaccharide chitosan was enlisted to form a freestanding hydrophilic membrane structure in microfluidic networks where pH gradients are generated at the converging interface between a slightly acidic chitosan solution and a ...

OBJECTIVE This study focusses on the development of a biomimetic oxygenator test device. Due to limited biocompatibility, current oxygenators do not allow mid- to long-term therapy. Tissue engineering uses autologous cell sources to overcome the immunogenic barriers of biomaterials. Surface coating with endothelial cells might improve hemocompatibility and thus prevent immunogenic reactions of ...