The work retraces influence of ¡-irradiation on changes of electrophysical characteristics and physical-chemical properties of polychlorobiphenil-containing transformer oil. It revealed that low doses of irradiation lead to sewing molecular units of oil together and thus raise its viscosity and density. High doses of irradiation break inter-chain bonds in oil ands thus decrease its viscosity.
Reaction of halogenation of aromatic compound containing electron-acceptor substituents in chlorine- and bromine inducing system has been studied. It established that electrofilic substitution of hydrogen atoms by chlorine or bromine in benzene nucleus proceeds as in the case of aromatic compounds with electron-donor substituents.
Flavonoids of Cephalaria velutina have been studied. Flavonoids – luteolin, kversetin and gigantozid A identified.
Analysis of dynamic development of hydrogen production as universal carrier of energy and its influence on ecology of environment has been examined.
The n-alkans adsorbtion over H-forms of various zeolites by IR spectroscopy method has been studied. Alkans are shown to be adsorbed on zeolites surface through formation of weak hydrogen bonds with Broensted acid sites which depending on the nature of adsorbed alkan results in shifting Si(OH)Al (bridge form) valent oscillation adsorbtion bands toward low frequencies.
The kinetics of accumulation process of non-equilibrium charge carriers (free electrons of n and p holes) in silicate systems under the effect of γ-radiation has been studied by the acceptor method. The laws of beryllium content effects in the silicate composition on the yield of localized states of non-equilibrium charge carriers established. It revealed that […]
Methods of synthesis of various derivatives of 4-hydroxy-3,5-ditertbuthylbenzaldehyd that possesses of antioxidant propertie have been studied. Structures of obtained compounds confirmed by IR, 1H, 13C NMR spectroscopy methods.
The new pyrazin- and triazin modulated tripyridylamine ligand (H2dpztzda), its mononuclear copper (II) complex have been synthesized and structurally characterized. In the mononuclear complex copper(II) ion is six-coordinated in tetragonal bipyramid geometry. Perchlorate anions are relatively weakly coordinated in the axial positions. H2dpztzda ligand corresponds to Cu(II) as tridentate ligand.
The radiation-chemical method of water treating from oil pollution is considered. Regularities of radiation-thermal decomposition of hydrocarbons in the mix with water examined in the case of heptane. Conditions providing 85-90 % decomposition of heptane are shown.
Using DSK and quantitative DTA methods the thermodynamic functions of phase melting and polymorphic transformations of AgBiX2 (X-S, Se, Te) compounds have been determined. The comparative analysis of the obtained results with the literary data and values ΔSm calculated in some approximations has been carried out. The conclusion about significant change in the structure of […]