In the present paper the separation of three amino acids applying ligand exchange chromatography in single and dual chiral systems was modeled using the dispersive equilibrium model. The investigated systems consist of a commercially available non chiral column and a commercially available chiral column using a chiral mobile phase. With the experimentally determined model parameters and the mul...

The present study proposes a model to explain the adsorption process through ionexchange membrane adsorbers. The model is defined by the continuity equation, expressed as a differential mass balance of the solute over a section of the membrane, and the Langmuir isotherm. The proposed model uses dimensionless variables that were defined by characteristic times of the global process. To examine t...

The infiltration of pressurized aqueous solutions of sodium cholate hydrate (CSH) and ammonium 8-anilino-1-naphthalenesulfonate (1,8-ANS-NH4) in a hydrophobic silica gel is investigated experimentally. The CSH and 1,8-ANS-NH4 molecules act as promoters that lower the infiltration pressure in relatively large nanopores, resulting in the staged sorption isotherm curves. When the CSH concentration...

We describe a simple procedure for photolithographic patterning of streptavidin on silicon substrates. Long wavelength UV (365 nm) light was used to direct the covalent attachment of photoactivatable biotin onto silylated silicon wafers. Fluorescently labeled streptavidin was found to bind only in areas exposed to the light. We used this procedure to selectively pattern streptavidin inside micr...

The malt bagasse is a solid residue, highly produced in the brewing industry. presence of high levels antioxidants its composition makes this residue an attractive possibility as corrosion inhibitor, besides being sustainable and low cost alternative to inorganic procedures currently used prevent corrosion. In sense, work evaluated efficiency powder inhibitor on surface AISI 1020 carbon steel, ...

We construct unramified central simple algebras representing 2-torsion classes in the Brauer group of a hyperelliptic curve, and show that every 2-torsion class can be constructed this way when the curve has a rational Weierstrass point or when the base field is C1. In general, we show that a large (but in general proper) subgroup of the 2torsion classes are given by the construction. Examples ...

In this brief note, we prove the following two Artin-Schreier curves are supersin-gular.

A favorable isotherm open to the right to some extent is better than a linear isotherm to give shorter column height in pressure swing adsorption(PSA). We face to a problem how favorable isotherm is actually favorable in PSA operation. The purpose of this paper is to propose how to construct such a custom made isotherm which optimizes the PSA processes. The PSA mod...