This paper describes use of gradients of concentration generated in flow injection (FI) systems to perform determinations based on points where the concentration of titrant and analyte are at stoichiometric ratio. Two procedures were developed. In one procedure the titrant is injected in a FI manifold and merges with the sample which is continuously pumped towards the detector. In the other pro...

Interaction between anionic (and cationic) colloidal particles of silica having the particles diameters 12 and 22 nm with synthetic cationic (and anionic) polyelectrolytes of various nature and structure was studied by potentiometric, conductimetric spectroturbidimetric and viscometric methods in aqueous solution. It was shown that the complexation of silica nanoparticles with linear polyelectr...

Cationic latex particles with surface amino groups were prepared by a multistep batch emulsion polymerization. In the first one, two or three steps, monodisperse cationic latex particles to be used as the seed were synthesized. In the third and fourth steps, the amino-functionalizedmonomer aminoethylmethacrylate hydrochloride was used to synthesize the final functionalized latex particles. Thre...

The objective of this work was to determine the effect of heat application on whey protein concentrate (WPC) in combination with hydroxypropylmethylcellulose (HPMC) addition to improve the foaming properties of the system and to relation these with the interfacial ones. Under these conditions 1 × 10-2 and 1% w/w of whey protein solutions were mixed with 1 × 10-2 and 1% w/w of polysaccharide. So...

polymerization are negatively charged in a broad pH range The aim of the present work is to prepare and characterize of 3–10 (4), but their surface charge density is extremely carboxylated latexes (CLs) in order to bind antibodies covalently high (4). At a low ionic strength the antibody cannot peneand efficiently. Carboxylated latexes were prepared by surfactanttrate the double layer of the pa...

We use the conductimetric method, adequate to electrolytes, to determine the lysozyme charge in lys-water and ternary lys-salt-water systems. We measured also the viscosities for the above binary and ternary systems in the same conditions at pH= 4.5 and T= 298 K, measurements that allow us to see any effect of viscosity on cations mobilities and implicitly on the lysozyme charge. The method is ...