№ 68(4), April, 2011
Public date: 28.04.2011
Archive of journal: Articles count 48, 75 kb
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SHRINKAGE OF A FUMED OAK WOOD AT VARIOUS PROCESSING MODES
DescriptionShrinkage of a fumed oak wood values that was sub-jected to preliminary thermo chemical processing and raw are investigated. Conformities to the law of influ-ence to processing modes on shrinkage size are estab-lished
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Description
In the article questions of optimal control of tempera-ture maintenance in a cattle-breeding complex are considered. Possibility of use of discrete management is shown. The optimum step of digitization is found
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TECHNOLOGIES AND AGRO TECHNICAL REQUIREMENTS TO SPRINKLING MACHINES
DescriptionTechnologies and agro technical requirements to sprinkling machines depending on its flow, the area of irrigated area and agro-climatic zone are presented in the article
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INFLUENCE OF ROTATION FREQUENCY OF CHAIN WORKING BODY ON ITS OPERATIONAL EFFICIENCY
DescriptionBased on imitating modeling the analysis of effi-ciency of a chain brush cutter with working body of a new design is carried out. Influence of frequency of rotation of the work body on indicators of quality of removal of young growth and power expenses is investigated
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Description
The article deals with the method of experiment and results of heat tests of transformer. This transformer intends for transformation of single-phase voltage into three-phase one. Use of this transformer allows to transform three-phase voltage in single-phase with the minimum decrease in indicators of quality of voltage from a power line
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TURBULENT TRANSFER EFFECTS OF THE FINE PARTICLES IN THE LIQUID PHASE OF DYNAMIC SEPARATORS
DescriptionThe turbulent movement of the liquid with dispersed phase in the channels of thin layer clarifiers and hydrocyclones is reviewed. The evaluation of the dimensions of the particles, which are taken by the turbulent pulsation is performed. The turbulent sedimentation of the fine phase is researched as a type of a process of diffusion. Using the equations from the theory of mass transfer and the edge of the turbulent level, the coefficients of the speed of the transfer of the particles are acquired. The results of the calculations, covering the effectiveness of the turbulent separation are provided, with the use of the models of perfect mixing and displacement
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COMPRESSION THERMAL PUMPS IN HEATING SYSTEMS
DescriptionIn this article, a possibility of a heat supply of housing and communal services with use of thermal pumps is considered. The area, in which thermal pump is the most expedient way to use for heat supply systems is shown
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INVESTIGATION OF A SOWING UNIT OF OVERPRESSURE WITH A FORCED
DescriptionThe article presents the results of experimental investigations of pneumatic sowing unit of overpressure with a forced encapsulation of a seeding chamber when sowing corn. The analysis of a received mathematical model of dosing is given
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DNA TECHNOLOGY OF PCR ANALYSIS OF CODLING MOTH POPULATIONS BY MICROSATELLITE LOCI
DescriptionThe DNA technology of the PCR analysis of codling moth populations by microsattelite loci is adduced in detail. It includes a list of the equipment, consumable materials and chemical agents, methods of DNA extraction, PCR analysis and electrophoresis of amplification products in polyacrilamid gel. The example of the PCR analysis of codling moth population from Krasnodar region with two microsattelite loci is adduced
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Description
The research work was conducted on the tomato hybrid F1 Мо 755 × L. esculentum var racemigerum (Lange) Brezh. The individual characteristics of the reproductive system of tomato F1 hybrid were studied for their further inclusion into the selection programs. The dynamics of these factors in regard to the clusters in the tomato inflorescence was investigated.