


Том 480, № 1 (2018)
- Год: 2018
- Статей: 2
- URL: https://journals.rcsi.science/0012-5016/issue/view/9243
Physical Chemistry
Biological Xenogenic Vessel Prostheses: Effect of H2O/CO2 and EtOH Media on the Structure and Mechanical Properties of the Bovine Jugular Veins
Аннотация
The effect of the H2O/CO2 and EtOH/CO2 media at pressures and temperatures corresponding to the formation of supercritical (sc) carbon dioxide on the structure and mechanical properties of bovine jugular veins was studied for the first time. Treatment of bovine jugular veins in an sc-CO2 + ethanol or sc-CO2 + water medium considerably devitalized the tissue and increased the tissue elasticity, which allows considering the treated veins as promising vascular grafts with expected high capacity to suppress calcification and good hemodynamic properties.



Propagation of Cellular Modes of Combustion of Porous Media under Nonadiabatic Conditions
Аннотация
The formation and propagation of cellular combustion of porous media under near-critical combustion existence conditions were investigated. The sizes and structure of cells in which the condensed component reacted with the gas depended nonlinearly on the heat loss to the environment. With increasing heat loss, the oscillation frequency of the cellular front, its average propagation velocity, and the intensity of the exothermic transformation of the condensed phase increased, and the cell sizes decreased. Cellular combustion was extinguished only when the transformation of the condensed component within a cell was completed.


