Ecological Applications in Modern Chemistry 2015 : Book of abstracts

Ecological Applications in Modern Chemistry 2015 is 2nd year of the EAMCH conference. The scope of this conference is focused on all renewable energy sources and environmental aspects of modern chemistry and technologies. Typically it includes: materials for hydrogen fuel cells, ionic conductors, piezoelectric and magnetic materials, materials for solar cells. The lectures deals with practical applications of these technologies, especially with relation with environment (water, atmosphere, etc.) are welcomed too

Determination of rate constants of chemical reactions by means of measured time behaviour of absorbance

The calculation procedures of reaction rate constants and absorption coefficients in systems giving coloured products are described. The calculated values are compared with the experimental notes

Integrated environment for simulation of chemical reaction kinetics

This article briefly describes an investigated environment suitable for simulation of the kinetics of the chemical reactions. The term “simulation model“ is presented in the article together with the well-known terms such as “reaction scheme” and “mathematical model”. The simulation model is suitable for solving the problems of reaction kinetics. Integrated environment can be used for simulation of biological processes and activated-sludge basins for the biological waste-water treatment

Study of the kinetics of biodegradation of tetraethylene glycol mono-n-octyl ether and tetraethylene glycol and simulation of the formation of some intermediates

The biodegradation courses of the pure tetraethylene glycol mono-n-octyl ether and tetraethylene glycol using the mixed microbial culture under the static conditions are described. The formation of main intermediates in dependence on time was simulated by chosen kinetic models, differential equations and worked out programme. Both the decreases in the concentration of initial compounds and the increases in the concentration of formed metabolites in dependence on time were determined by means of analytical method. The analytical results in graphic form were compared with the data found by simulation of the biodegradation

The Key Role of Tin (Sn) in Microstructure and Mechanical Properties of Ti2SnC (M2AX) Thin Nanocrystalline Films and Powdered Polycrystalline Samples

Layered ternary Ti2SnC carbides have attracted significant attention because of their advantage as a M2AX phase to bridge the gap between properties of metals and ceramics. In this study, Ti2SnC materials were synthesized by two different methods—an unconventional low-energy ion facility (LEIF) based on Ar+ ion beam sputtering of the Ti, Sn, and C targets and sintering of a compressed mixture consisting of Ti, Sn, and C elemental powders up to 1250 °C. The Ti2SnC nanocrystalline thin films obtained by LEIF were irradiated by Ar+ ions with an energy of 30 keV to the fluence of 1.1015 cm−2 in order to examine their irradiation-induced resistivity. Quantitative structural analysis obtained by Cs-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) confirmed transition from ternary Ti2SnC to binary Ti0.98C carbide due to irradiation-induced β-Sn surface segregation. The nanoindentation of Ti2SnC thin nanocrystalline films and Ti2SnC polycrystalline powders shows that irradiation did not affect significantly their mechanical properties when concerning their hardness (H) and Young’s modulus (E). We highlighted the importance of the HAADF-STEM techniques to track atomic pathways clarifying the behavior of Sn atoms at the proximity of irradiation-induced nanoscale defects in Ti2SnC thin films

Study of Interactions between Titanium Dioxide Coating and Wood Cell Wall Ultrastructure

Titanium dioxide (TiO2) is used as a UV light absorber to protect wood matter from photodegradation. In this paper, interactions between wood and TiO2 coating are studied, and the efficiency of the coating is evaluated. For the experiments, two wood species were chosen: beech (Fagus sylvatica) and pine (Pinus sylvestris). Molecular and physical modifications in coated and uncoated wood exposed to UV radiation were investigated with Fourier transform infrared spectroscopy with attenuated total reflectance (FTIR-ATR) and transmission electron microscopy (TEM). UV-VIS spectroscopy was used to describe the absorption of UV light by the TiO2 planar particles chosen for the experiment. It was demonstrated that TiO2 coating protects wood against photodegradation to a limited extent. TEM micrographs showed fissures in the wood matter around clusters of TiO2 particles in beech wood