The osmotic coefficient of aqueous solutions of cyclohexylsulfamic acid was determined by freezing point measurements up to the molality 0.65 mol kg-1. The osmotic coefficients were fitted to the Pitzer equation, and ion interaction parameters α1, β(0) and β(1) were evaluated. The mean ion activity coefficient of the solute was calculated, and the non-ideal behaviour of the system investigated ...

The administration of drugs to the inner ear via the round window membrane is becoming more widely used for both clinical and experimental purposes. The actual drug levels achieved in different regions of the inner ear by this method have not been established. The present study has made use of simulations of solute movements in the cochlear fluids to describe the distribution of a marker solute...

We study solute transport in porous media with periodic microstructures consisting of interconnected thin channels. We discuss a local physical mechanism that occurs at the intersections of channels and promotes mixing of the solute with the solvent (i.e., the host liquid). We identify the parameter regime, where this mechanism is the dominant cause of dispersion, and obtain the effective or ma...

In this work, the molecular interaction between carbamazepine and alizarin in methanol has been represented terms of limiting apparent molar volumes viscosity coefficients. Before further proceeding, validity applicability calculation have also checked by considering available five types frequently used equations, where required modifications proposed addition hypothetical mass concentration so...

1. Introduction Ultrafiltration is used for protein concentration and buffer exchange in the downstream processing of essentially all recombinant protein products [1]. Although ultrafiltration has traditionally been viewed as a convective pressure-driven process, with the separation determined on the basis of size, solute transport through ultrafiltration membranes is also strongly influenced b...

The efficiency of a high-flux dialyzer in terms of buffering and toxic solute removal largely depends on the ability to use convection-diffusion mechanism inside the membrane. A two-dimensional transient convection-diffusion model coupled with acid-base correction term was developed. A finite volume technique was used to discretize the model and to numerically simulate it using MATLAB software ...

Aqueous solutions of the bioprotectant proline are simulated for solute molar fractions ranging from 2.0 · 10 3 to 2.3 · 10 . Statistical analyses show that proline affects the water structure more strongly than glycine betaine and trimethylamine-N-oxide, two of the most effective bioprotectants widely diffuse in nature, and as strongly as tert-butyl alcohol, a protein denaturant which at high ...

Modeling of liquid ceramic precursor droplets axially injected into a plasma is presented. Droplets undergo heating and solvent vaporization leading to high solute concentration near droplet surface. At a critical solute super-saturation concentration, precipitation is postulated to occur forming a precipitate shell around liquid core. Internal pressurization and rupture of shell occur subseque...

A three-dimensional (3D) lattice Boltzmann (LB) model is developed to simulate the dendritic growth during solidification of Al-Cu alloys under forced and natural convection. The LB method is used to solve for solute diffusion and fluid flow. It is assumed that the dendritic growth is driven by the difference between the local actual and local equilibrium composition of the liquid in the interf...

When a polymer membrane containing an immobilized, reactive chemical is in contact with solution containing a reactive solute, the solute diffuses into the membrane and reacts with the immobilized chemical. As a result, the reactive solute and the immobilized chemical are consumed, and at the same time, mobile products may be produced within the membrane. The mobile products will diffuse out of...