modifiers

“Electronic tongue” multi-systems for the separate determination of cefotaxime and cefazoline

Authors: Kulapina E. G., Dubasova A. Е., Kulapina O. I., Ankina V. D.

. Electroanalytical properties of unmodified and modified by polyaniline and by CuO nanoparticles solid-contact potentiometric sensors which are based on associates of tetradecylammonium with complex compounds of silver (I) with cephuroxime, cephotaxime and cephazoline Ag(β-lac)2TDA in solutions of corresponding antibiotics were studied. It was revealed that Ag(β-lac)2TDA –based sensors had no specificity to the basic ion but showed sensitivity to other cephalosporins.

Influence of the Modifying Additive Nature on the Rheological Properties of the Concentrated Chitosan–Organic Acid–Water System

Authors: Fomina N. V., Malinkina О. N., Gegel N. O., Shipovskaya A. B., Abramov А. Y.

The influence of the nature of a modifying additive selected from the class of stabilizers and thickeners (high-molecular-weight chitosan, starch, xanthan gum, sorbitol, and pyridoxine hydrochloride) on the rheological properties of the concentrated chitosan–organic acid– water system (freshly prepared or stored at 4 and 20°C) was studied. It is shown that all the modifiers have a stabilizing and thickening effect, resulting in an increased viscosity of the multicomponent system and a lower rate of its fall in time.