Thermoheliox: effect on the functional hemodynamics of the human brain

A kinetic study of the effect of thermoheliox (inhalation of a helium and oxygen mixture, 70 °C) on the functional hemodynamics of the human brain by functional magnetic resonance imaging was carried out. The dynamic responses of the BOLD signal were found to be biphasic. An empirical equation describing the first phase of the hemodynamic response to visual stimulus was proposed. It was shown that preliminary inhalation of thermoheliox stimulates the hemodynamic responses by slowing down the vasoconstriction.

     

Macrokinetics of carbonaceous feedstock pyrolysis in a tubular reactor of variable cross section

A macrokinetic model of carbonaceous feedstock pyrolysis in a tubular reactor of variable cross section was constructed. It was shown that, to intensify the pyrolysis in such a tubular reactor, its diameter should vary depending on the viscosity of the reaction products.     

Nonlinear base models of macrokinetics

The conception of base macrokinetic models of processes taking place on the catalyst surface has been developed by analysis of nonlinear distributed models. This conception implies a parametric analysis of the simplest models allowing multiple steady states, self-oscillations, and the existence of unsteady-state dissipative structures.     

Thermocycle and Evolutionary Combinatorics in the Genesis and Evolution of Protobiopolymers. Basic Kinetic Principles

The basic kinetic principles of genesis and evolution of protobiopolymeric molecules are discussed. An approach combining polymerization and selection of macromolecular structures is the thermocycle providing the thermodynamic feasibility of formation of the monomer–monomer bond and kinetic selection of structures by picking more regular complexes. The basic kinetic principle of the successful evolutionary process is formulated as follows: the systems win if the mechanism of their development involves exponential growth steps.     

Overall Kinetics of Heat Treatment of Municipal Solid Waste

A mathematical model of the overall kinetics of heat treatment of municipal solid waste was developed. The model considers the main initial substances and products of the reaction of municipal solid waste treatment at high temperatures (1300–1500°C) in a tubular flow reactor.     

On the role of branched-chain (autocatalytic) reactions in the carbonaceous feedstock pyrolysis kinetics at oscillating temperature

A kinetic model of flash pyrolysis as a branched-chain process was presented. It was shown that, under unsteady temperature conditions, the branched-chain process significantly enhances carbonaceous feedstock processing.