02.00.00 Chemical sciences
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ANALYSIS OF PHASE DIAGRAMS OF DOUBLE SYSTEMS OF FAT ACIDS
DescriptionThe article is devoted to research of binary mixtures of fat acids by means of experimental and calculation methods
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ANALYSIS OF PHASE PLOTS OF STEARINE-PALMITINE-MIRISTINE FATTY ACIDS TRIPLE SYSTEM
DescriptionThe article is devoted to the research of triple mixtures of fatty acids by means of experimental and calculation methods
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Article is devoted to the research and working out of calculation method of thermodynamic data and phase diagrams of ternary alloy materials of low-melt metals with the use of data bases known in literature.
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The article is devoted to the research and working out of calculation method of thermodynamic data and phase diagrams of pentonary alloy materials of low-melt
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The article is devoted to research and working out of a method of calculation of the thermodynamic data and phase diagrammes of two-componental alloys of fusible metals with use of the databases, known in the literature
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RESEARCH OF PHASE-TRANSITIVE MATERIALS BY THE EXPERIMENTAL METHODS
DescriptionThe article is devoted to the application of method of differential-scanning microcalorimetry for research of phase-transitive materials on the base of inorganic and organic substances.
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Theoretically and experimentally, we investigated the process of adjusting the pH of natural water of hydrocarbonate class electrodialyzer with bipolar membranes with channel length of 40 cm. We experimentally measured concentration of components, pH of the solutions in alkaline and acid channels of electrodeposition depending on the current density. The article describes a mathematical model for long channels; to scale the mass transfer characteristics of the process there was applied and verified a method of compartmentalization, which gave the possibility to calculate the dependence of the component along the channel length at different velocities of flow of the solution. Numerical calculations were compared with experimental data on electrodialyser of 10 cm and 40 cm length
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MODELING OF CULTIVATION ON PRODUCTIVITY LACTIC ACID PRODUCER LACTOCOCCUS LACTIS CH5
DescriptionThe equations for evaluation of the stationary state of lactic acid microbiological synthesis have been received. The kinetic dependencies for specific biomass growth rate, consumption of the substrate are given. The particular qualities of growth of homofermentative lactic acid producer Lactococcus lactis CH5 depending on the composition nutrient medium: glucose and yeast autolysate concentration are examined. The influence of the method of cultivation on the productivity and the speed of the lactis acid synthesis are analyzed
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NANOMATERIALS IN AGRICULTURE: RECEPTION AND APPLICATION
DescriptionIn this article application of new nanomaterials as microfertilizers is offered. On the basis of the preliminary analysis the structure and the form of application of fertilizers are motivated. Modern ways of nanomaterials reception are presented
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The present article belongs to the area of organic chemistry, namely, to chemistry of heterocyclic compounds. For the purpose of optimization of a method of synthesis the threecyclic heteroaromatic systems containing a pyridi-ne, thiophen and pyrimidine ring in one molecule, - tetrahydropyridothienopyrimidinon and dihydropyri-dothienopyrimidinon – reaction 3-aminothieno[2,3-b]-pyridine-2-carbokxamides with aromatic aldehydes is studied, some of which contain pharmacolodical groups. Reaction was carried out in the conditions of an acid catalysis – is used p-TsOH. Influence of the nature of solvent (toluene, ethanol, mix ethanol-dimethilform-amide (1:1)) on the course and the direction of reaction are studied. It is established that carrying out reaction in toluene leads to the dihydropyrimidine containing in situation 2 phenyl, 4-bromphenyl deputies. In the presence in a molecule of initial aldehyde of the deputy in orto-situation tetrahydropyrimidine are formed. Use of ethanol mainly leads to formation of a tetrahydro-pyrimidine ring. Boiling of initial substances in mix ethanol-DMF yields the results similar to use of toluene, but time of reaction is reduced twice. The way of receiving the dihydroderivatives short-term boiling of tetrahydropyrimidine is found in mix isopropanol-DMF (a volume ratio of solvents 1:3). Identity of the received substances is proved by method of a thin layer chroma-tography. The structure of the synthesized connections is confirmed with the element analysis. The structure of tertagidropirimidinon and digidropirimidinon is proved with use of data of IK and NMR 1H of the spectral analysis