Method of analysis of particle sedimentation rate in aqueous media

This article deals with the analysis of particle sedimentation velocity in water media with application of video information and pictures management. Kinetics of particles sedimentation in model suspensions and in wastewater were studied by gravimetric method and also by method of video recording of sedimentation with digital photo camera and pictures processing in computer program Adobe Photoshop CS3. In the result of research it was found that analyses of histograms of brightness make it possible to determine particles sedimentation velocity in water media with less time and labor expenditures than in gravimetric method

Analysis of influence of microorganisms on heavy metals adsorption by aluminosilicate sorbents

The article is devoted to the problems of sorption purifying of the water environments polluted by heavy metals ions. The influence of microorganisms on sorption properties of aluminosilicate sorbents is examined. It was studied sorption of Fe 2 + , Cu 2 + ions with bacterial cell in the free state immobilized on a surface of aluminosilicate sorbents and also at formation of biofilms. It is shown that the presence of the immobilized microorganisms increases the limiting capacity of heavy metals sorption by aluminosilicate sorbent. The formation of biofilms on the surfaces of sorbent increases heavy metals resistance of microorganisms and their sorption efficiency in comparison with the aluminosilicate sorbent

Methods of residual quantities of antibiotics and inhibitors detection in raw milk

The article is devoted to the problems of detection of residual quantities of antibiotics and inhibitors in raw milk. It was analyzed the following microbiological methods: substances diffusion into agar, reductase probe, biocalorimetry and biotesting of microalgae motion. In the publication was shown that methods of biocalorimetry and biotesting of Euglena gracilis motion allow to increase sensitivity of antibiotics detection and to decrease time and labour inputs for analyses. These methods may be recommended for practical application at dairy farms and dairy processing enterprises

Strong short-range magnetic order in a frustrated FCC lattice and its possible role in the iron structural transformation

We investigate magnetic properties of a frustrated Heisenberg antiferromagnet with a face-centered cubic (FCC) lattice and exchange interactions between the nearest- and next-nearest neighbours, J1 and J2. In a collinear phase with the wave vector Q = (pi,pi,pi) the equations of the self-consistent spin-wave theory for the sublattice magnetization and the average short range order parameter are obtained and numerically solved. The dependence of the Neel temperature T_N on the ratio J2/J1 is obtained. It is shown, that at strong enough frustration there is a wide temperature region above T_N with strong short range magnetic order. Application of this result to description of structural phase transition between alpha and gamma-phase of Fe is considered

Assessment of the Size of Rocks in Benchs and Lumpiness of the Blasted Mountain Mass on Pits with Use of Gis Geomix

On the basis of natural researches in career of SC Kovdorsky MCP and computer processing of their results in GIS GEOMIX was developed the photometric method of assessment of blocks (sizes) of breeds in the slope of ledges of a pit, the existing version of this method intended for assessment of lumpiness of mountain mass is improve