№ 58(4), April, 2010
Public date: 28.04.2010
Archive of journal: Articles count 32, 52 kb
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THE RESEARCH OF VITIS SILVESTRIS GMEL. IN THE NOTHERN CAUCASUS
06.00.00 Agricultural sciences
DescriptionVitis vinifera subsp. silvestris Gmel. is the wild subspecies of Vitis vinifera L. and an important source of genetic resources for grapes breeding. Currently, this form is very rare in the world. In this paper, conducted the first study of wild grapes which was found in the North Caucasus with the use of two microsatellite markers. The study have shown a high level of genetic diversity: intrapopulation variability was 75,2%, the interpopulation variability accounts was 24,8%. All populations are characterized by certain unique genetic structure and may be as donor of resistance genes which have a long-term evolutionary selection
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EXTRACTION OF DNA FROM HERBARIUM LEAVES VITIS VINIFERA L.
06.00.00 Agricultural sciences
DescriptionTwo methods were used for DNA extraction from herbarium leaves of two subspecies: V. vinifera subsp. sativa D.C. и Vitis vinifera ssp. silvestris Gmel. DNA extraction is difficult from herbarium leaves plants because of the presence of metabolites that interfere with DNA isolation procedures and downstream applications such as DNA restriction, amplification, and cloning. The quality of DNA was checked on a spectrophotometer by measuring the level of absorption at A260/280 nm. The results showed the successful extraction from mature and dried leaves of DNA when using the СТАB-method №2. Another method hasn’t shown satisfactory results in amplification of DNA
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TURBULENCE THEORY AND ROUGHNESS DENSITY EFFECT MODEL
01.00.00 Physical-mathematical sciences
DescriptionThe model of the turbulent boundary layer over a rough surface is presented. The model is based on the special type of transformation of the Navier-Stokes equation. The turbulent boundary layer in this model is considered as a flow above the rough surface gener-ated by the viscous sublayer (the dynamic roughness effect). The roughness density effect on the shift of the mean velocity logarithmic profile has been estimated in the case of 2D and 3D roughness elements
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THEORY AND CONSTANTS OF WALL TURBULENCE
01.00.00 Physical-mathematical sciences
DescriptionThe completely closed model of wall turbulence was derived directly from the Navier-Stokes equation. The fundamental constants of wall turbulence including the Karman constant have been calculated within a theory. This model has been developed also for the accelerated and non-isothermal turbulent boundary layer flows. The estimated mean velocity, temperature and impurity concentration profiles as well as the spectral characteristics of the streamwise velocity component are to be shown in a good agreement with the experimental data
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Description
The essence of perspective method of Direct-costing" consists of use of direct variable expenses which directly concern on production cost price (so-called relevant expenses), not only for the account, but first of all as factors of management of volumes of manufacture of various kinds of production. However this method has a number of lacks: first, this analysis is carried out within the limits of system of controlling of the enterprise, instead of branches and diversified agrarian and industrial complex of region; secondly, in calculations of this method is accepted, that production volumes linearly depend on expenses for its manufacture that is true only at extensive evolution of manufacture, in the narrow limits defined enough at which manufacture volumes can increase extensively without technology and organization change; thirdly, in calculations of this method the force and direction of influence of factors, and also a kind of function of this influence is not defined. Overcoming of these lacks could raise efficiency of the Direct-costing method and expand area of its application. However, this problem was not set and was not solved, first of all, because of absence of a corresponding mathematical method, and also program toolkit realizing it and a technique of its application. In this work the given problem is set and its complex decision is offered. Numerical examples are resulted
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CONSTRUCTION-TECHNOLOGICAL IDEAS FOR PROTECTION AND PLANTS CARING
DescriptionThe article presents the analysis of mechanize processes for chemical protection of plants and the new construction of spraying with low gallonage, a new method and water solution and machine for address painting at litter plants by organic glue with chemical destroy, and new grass cutter with address painting of litter plants by organic glue with chemical destroy, and new cutter designed to destroy weeds with electric current
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Description
The article presents the analysis of mechanize processes of soil processing and new constructions of universal chisel loosening and combination sowing unit for seedbed soil structures loosening
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Description
In this article results of research of technologically full chain of grain manufacture, its processing and realisation of baking production are resulted. Mathematical models which describe transformation processes in blocks of a technological chain are received
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Description
In this article the concrete definition of generalized stream-oriented model of economic efficiency of technologically full chain of grain manufacture, its processing and realization of baking production is spent. The mathematical models describing processes of transformation in blocks of a technological chain are received, and the model for estimation of its economic efficiency is developed
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Description
An example of expert analysis method of preventive and corrective actions of a major gas transmission company, aimed at environmental improvement has been shown