№ 130(6), June, 2017
Public date: 30.06.2017
Archive of journal: Articles count 87, 224 kb
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06.00.00 Agricultural sciences
DescriptionThe contents of lead in soils are primarily determined by regional factors: the composition of parent rocks, relief, climate, vegetation. In recent years, these factors have increased the anthropogenic source of element. In order to assess its impact, requires knowledge of the natural, i.e., background lead levels, the so-called reference points, which can later be used to monitor changes occurring in the soil. Under background refers to the content of the element in soils at a great distance from the areas of receipt of contamination. Background content of lead in each type of soil depends mainly on composition of parent rocks. The correlation coefficient between the content of lead in parent rocks and soils, with the background contents is equal to 0,86±0,17 at p=0,95. For each soil type there are low variations in lead content due to the composition of parent rocks. Lead concentrations in the soils increased at the expense of its receipt from the atmosphere, irrigation water, drainage during mining, as a result of agricultural use, lead containing chemicals. Comparing the obtained results with existing currently permissible concentrations (APC, MPC) it is necessary to note that the lead content in leached chernozem soil after three rotations of the rotation may not cause any pathological changes or anomalies in the course of biological processes and lead to accumulation in the agricultural plants, and therefore may interfere with biological optimum
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COENOPOPULATION STATE OF SOME FABACEAE SPECIES UNDER CONDITIONS OF THE MIDDLE LENA RIVER VALLEY
DescriptionThe study concerns the results of the study of coenopopulations of the following Fabaceae species: Medicago falcata, Oxytropis candicans, and Onobrychis arenaria under conditions of the Middle Lena River. The study was conducted in Yakutsk vicinities, 13 km north-east of the city. It is stated that all the studied coenopopulations are normal. Rather small values of substitution and recovery indices evidence certain problems in self-maintaining processes. The age structure analysis using two age indices, “delta” and “omega”, allows to classify the coenopopulations of Medicago falcata, Oxytropis candicans and Onobrychis arenaria in phytocoenoses of the Lena River valley as normal young populations. They were prevailed by juvenile, immature, virginile, and young reproductive plants
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Description
The article provides an overview of Express-methods of quality evaluation and identification of lipidcontaining plant raw materials (oil seeds) and its processed products (oil cakes, oilseed meals, vegetable oils, lecithins) using pulse method of nuclear magnetic resonance. Development of express methods of quality evaluation and identification of lipid-containing plant raw materials and products of its processing is a priority, as these methods are environmentally safe and also allow us to regulate technological conditions of refining processes, are characterized by low error of determination, i.e., high precision, and, in some cases, it is only possible to use because of its non-destructive effects on the analyzed sample. Currently, we can distinguish the following main directions of quality evaluation and identification of lipid-containing plant raw materials and products of its processing on the basis of the pulse method of nuclear magnetic resonance: assessment of quality and identification of oilseeds (sunflower, canola, flax, soybeans); evaluation of quality of products of processing of oil raw materials (cake and meal); the quality evaluation and identification of vegetable oils; assessment of the quality of the lecithins obtained from vegetable oils. The methods of quality evaluation and identification of lipid-containing plant raw materials and its products are patented and have several advantages: short time (5 minutes) spent on the implementation of the single analysis; eliminates the use of toxic chemicals; does not require special training of laboratory personnel; non-destructive character, which is especially important for oilseeds from the point of view of breeding work. On the basis of the conducted survey we can conclude that the pulse method of nuclear magnetic resonance has found wide application for assessment of quality and identification of lipidcontaining plant raw materials and products of its processing, through rapid capabilities, high accuracy and ease of analysis
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FAIR VALUE OF PROPERTY, PLANT AND EQUIPMENT OF THE ORGANIZATION ACCORDING TO IFRS
DescriptionFor national financial accounting, fair value is really a problem. The reasons for that are various. First, there is an opinion that assessment procedure is not accounting "case", we have appraisers for that. The entities do not hurry to estimate fair value independently not to violate the law on assessment. They do not do it for the reason that transition from estimates on original cost to estimates is at fair value quite reasonable and we accept from the point of view of improvement of quality characteristics of the reporting, and here the return transition is rather complicated, even, one may say, is impracticable. Often, estimates at fair value are considered as the instrument of a fraud, a manipulation financial results and the financial reporting in general. Besides, use of estimates at fair value increases expenses on creation of the financial reporting that not every entity is able to afford in the conditions of national business. Use of fair value can significantly influence indicators of activities of the entities, and not always positively. In addition, certainly, assessment at fair value is a professional judgment for which in most cases nobody wants to bear responsibility. Nevertheless, as we are headed for IFRS, we shall promote overcoming difficulties of use of fair value for the purpose of creation of IFRS reporting. There is a popular belief that the IFRS reporting are constructed on fair value. To some extent, this is true, but fair value is a multidimensional concept. For example, historical cost value of the asset purchased for money for date of transaction can be "fair" cost. The "fair" cost of the current receivables corresponding to recognition criteria an asset is the amount of its settlement. The "fair" cost of the obtained bank loan is the current (amortized) liability size for date of the financial reporting. However, this view of fair value is represented narrow-minded and can be sufficient unless for general idea about IFRS - the reporting, but cannot be used in the professional environment
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Description
It is known, that the voltage deviation from the nominal value leads to a change in the technical characteristics of the equipment and may cause a violation of their working ability, including leading to an emergency. The article deals with the known structural diagram of single-phase voltage stabilizers of AC power, the peculiarities of their work and their disadvantages. To improve the performance characteristics of single-phase AC voltage stabilizers, we have proposed a functional scheme of the stabilizers performed on transformers, autotransformers and optosymistors. The article considers features of the proposed circuit voltage stabilizers. To stabilize three-phase voltage we have proposed using a three-phase stabilizer. In this case, to improve the reliability of the reserve there may be a single-phase stabilizer, which automatically connects to the appropriate phase at malfunction of one of the working electronic voltage stabilizers. To stabilize three-phase voltage, a stabilizer can be made based on the three-phase transformer. In comparison with the use of a single-phase stabilizer in a three-phase system, the voltage stabilizer will have improved weight and overall dimensions. To significantly improve the technical characteristics of voltage stabilizers, working in the autonomous power supply systems, it is possible only through the use of modern mathematical apparatus, allowing to simulate the physical processes in power circuits of stabilizers in nominal and emergency modes of operation
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VOLTAGE REGULATION OF SOLAR POWER PLANTS AUTONOMOUS INVERTERS
DescriptionIn agricultural production, the direction of introduction of renewable energy for power consumers remote from the external electrical network is relevant. Here, prospects are revealed in front of the solar PV stations. One of the main functional units of solar power is inverters that convert the DC voltage of the solar panels into alternating current. The article describes the advantages and disadvantages of the main methods of voltage regulation of the autonomous inverters of solar photovoltaic power plants. We have proposed new structural designs of autonomous voltage inverters, described their advantages, features of design and operation for voltage stabilization. We suggest stand-alone inverters designed using high frequency link, which will significantly improve mass and dimensions parameters of the converter. Due to the use of single-phase transformer with a rotating magnetic field in stand-alone inverters, we improve the efficiency of the converter and the reliability of the work. Patents of the Russian Federation confirmed the novelty of technical solutions of the considered schemes of autonomous voltage inverters. Structural schematics of the voltage regulators considered in the article, as well as features of their work, will allow to increase efficiency of preliminary works on development of autonomous voltage inverters with improved operational and technical characteristics for solar photovoltaic power plants
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THEORETICAL STUDIES OF THE HEATING SYSTEM OF A CATTLE-BREEDING COMPLEX
DescriptionThe article describes the modeling process of the heating system operation of a livestock-breeding complex. It presents graphs reflecting the influence of technological parameters of heat supply system of cattle-breeding complex with a catalytic combustion device on the parameters of energy efficiency of the system and the parameters characterizing the stability of the temperature conditions in the livestock sector
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Description
Modern conditions of production and business activities dictate the requirements for compliance and environmental protection and natural resource management. To fulfill this requirement, enterprises related to I-III category, are obliged to carry out industrial environmental control. This article covers theoretical bases of the organization of production control for the enterprise category III; we have also reviewed the sequence of actions of the enterprises to the organization for this type of control. The object of study is a car service enterprise. This article provides approximate content of the main sections of the documentation on organization of industrial environmental control and provides recommendations on creation of environmental car service enterprises. The approach for organization of production environmental control and offered samples of the documentation can be widely used in various industries
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TECHNICAL SOLUTIONS OF AN ENERGY SUPPLYING COMPLEX OF APIARY BASED ON A SOLAR PLANT
DescriptionWe have presented technical solutions of an energy supplying complex of apiary based on a solar plant, which ensure its functioning in the winter. Various aspects of the influence of the snow cover on the functioning of the complex are considered in the article. The favorable effect of the snow cover includes increasing the diffuse insolation, improving the thermal insulation of the building for placement of bees, which protects bee families from fluctuating external temperature. The negative effect of the snow cover includes adherence of snow to the receiving surfaces of solar energy converters, which can lead to decreasing the efficiency of using of photovoltaic modules and solar collectors. Both active and passive methods of combating snow sticking are suggested in article. Passive methods include installation of solar energy converters at an angle close to 90°, as well as their placement on the windward side. The simulation of the functioning of the complex based on a solar plant was conducted for climatic conditions of the Republic of Mari El (the time interval – from 14 October to 14 April, a photovoltaic module area – 1,3 m 2 with installation angles of 72˚ and 88˚). Because of the simulation, we obtained graphs of the changing the power of the photovoltaic module. Active methods include air injection onto the receiving surfaces of solar energy converters and using of heating elements
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Description
Solutions of a complex task of the analysis and assessment of efficiency of interaction of levels and branches of the government intended to provide successful development of regional economy, economy of the separate territory, SEZ are proposed. The task selection is justified based on the results of the analysis of trends, theoretical framework and practices of development management of regional economy and territory. In the study, special attention is paid to the creation and development of special economic zones (SEZ). Proposals and recommendations for improving the tools to control the development of regional economy and economy of certain areas, including a SEZ and to evaluate the effectiveness and efficiency of the interaction between levels and branches of government involved in the creation and implementation of projects of the SEZ are developed. It is shown that the use of the developed recommendations improves the prospects for successful development of territories and increases the effectiveness of management of regional economy and development of the SEZ