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The technology of creating an ultrathin medical coating for biliary stents based on polyvinylpyrrolidone with the addition of doxorubicin and carbon nanotubes with unique sorption properties is proposed. The adding of carbon nanotubes leads to increasing of the resistance and prolonged action of the drug. [ABSTRACT FROM AUTHOR]

The results of theoretical calculations of the interaction process of the components of the drug coating of biliary stents-polyvinylpyrrolidone, carbon nanotubes, doxorubicin, performed using the quantum chemical method of MNDO. It is proved that such a complex is stable. [ABSTRACT FROM AUTHOR]

In this work, the surface of the platinum disk electrode was modified with p–aminobenzoic acid by the method of oxidative electrografting (OEG) and the mechanism was proposed. The density of carboxyl groups immobilized in this way was estimated using differential pulse voltammetry. In addition, the effect of preliminary modification of the electrode surface by carboxylated carbon nanotubes (c–MWCNTs) on the density of carboxyl groups was studied. Modification allowed consequently improving the analytical characteristics of the working electrode. [ABSTRACT FROM AUTHOR]

Theoretical study of the possibility of interaction of one of the common substances in nature, carbon dioxide, with modified functional carboxyl and amine groups of carbon nanotubes and boroncarbon nanotubes of BC5 type was carried out. The results of interaction were analyzed and a comparative analysis of the efficiency of sorption interaction of the nanosystem with the carbon dioxide molecule was carried out. Recommendations for the further use of the results as a basis for the creation of a highly sensitive sensor device of a new generation for the detection of microcollections of substances are given. [ABSTRACT FROM AUTHOR]

In this paper shows the propagation of a one-dimensional extremely short pulse with an airy cross section in the medium of spatially oriented carbon nanotubes with a modulated refractive index. It has been proved that such pulses propagate steadily and retain their energy, which is localized in area. [ABSTRACT FROM AUTHOR]

This paper presents the results of the study of the effect of structural modifications of carbon nanotubes on the surface adsorption of the main elements of the products of the shot of the non-corrosive shock composition of the igniter. Carbon single-layer nanotubes of types «armchair» (6,6), «chiral» (3,6) and «zig-zag» (0,10) have been considered. The calculations are performed in the framework of molecular cluster model using semiempirical PM3 scheme. [ABSTRACT FROM AUTHOR]

The possibility of creating an anti-icing self-heating coating based on carbon nanotubes was explored. The influence of the quantity of coating layers on its conductive properties was studied. The possibility of modification of conductivity through annealing has been explored. Dependences of conductivity on the duration of the process of annealing are shown. An explanation to these dependences is given. A comparative analysis of the dependences for different types of CNTs has been conducted. [ABSTRACT FROM AUTHOR]

The evolution of photonic droplets in a medium of carbon nanotubes of the «zig-zag» type has been considered. It was shown that the propagation of photonic droplets is stable, the pulse energy remains localized in a limited spatial region. [ABSTRACT FROM AUTHOR]