Al(III) complexes with the ampicillin,amoxicillin, and cephalexin anions

The interaction of Al(III) with ampicillin, amoxicillin, and cephalexin anions (L) was studied by the pH-metric titration in aqueous solutions at 20°C and ionic strength 0.1 (KNO₃). In weakly acidic medium, complexes with the composition Al(OH)L and Al(OH)₂L were formed. The diagrams of the distribution of the complex forms of Al(III) depending on the pH were plotted. The constants of formation of the complexes were determined.     

Sorption of trypsin on the polysiloxane rubber surface

The sorption kinetics of trypsin on medical polysiloxane rubber and polysiloxane rubber modified with graphite was studied. The effect of the nonuniformity and hydrophilicity of the rubber surface on the trypsin immobilization rate was analyzed.     

Erratum to: Effect of Shock-wave Dusting and Ways to Suppress It

Journal of Experimental and Theoretical Physics - An Erratum to this paper has been published: https://doi.org/10.1134/S106377612230001X     

Effect of Shock-Wave Dusting and Ways to Suppress It

Journal of Experimental and Theoretical Physics - The ejection of particles from the free surface of metal liners accelerated to velocities of 4–5 km/s using explosive energy has been...     

Some aspects of the adhesion compatibility of hydrophobic and hydrophilic medicinal materials

The hydrophilicity and hydrophobicity of surfaces was studied after their treatment with solutions of NaOH and polyethylene.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 10, 2004, pp. 1750–1752.Original Russian Text Copyright © 2004 by Ostrovidova, Zamyslov, Makeev.     

Composite material for medical application

Composite material for medical application on the basis of polydimethylsiloxane rubber (PDMS) and graphite was obtained. The physico-chemical and mechanical properties of the material depending on the quantity, purity of the modifier and its preliminary treatment were studied. The established physico-chemical properties of the material surface allow to make the preliminary prediction of its thromboresistance.     

Research of properties of polyfunctional polymeric films

At present the problem of creating materials for medical application, which possess surface thromboresistant and antiseptic properties is of the great importance. The method of creating hydrogel films, containing anticoagulants, biologically active and antiseptic substances on the surface of well-known polymers of medical purity allows to give their surface special functions and properties and to retain the good mechanical properties [1,2]. In the majority of cases, the methods which are used for the creation of such films have a limitations which impede their wide application as they do not allow to obtain surface layers, possessing different medico-biological and physic-chemical properties. The aim of our research was the electroformation of biocompatible, polyfunctional poly(vinyl alcohol) (PVA) films with immobilizied anticoagulant, enzyme and antibiotic on the surface of a composite material on the base of polysiloxane of medical purity [3,4].