№ 111(7), September, 2015
Public date: 30.09.2015
Archive of journal: Articles count 117, 260 kb
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THE MATHEMATICALLY BASED CHOISE OF VISCOELASTIC IN SHUNT GLAUCOMA SURGERY
DescriptionThe dramatic lowering of intraocular pressure (hypotony) is developing during glaucomatous surgery due to the formation of the new aqueous humor outflow. The calculations of the flow in the fluid balance parameters have shown, that for the normal intraocular pressure maintenance in the postoperative period the fluid flow out of the anterior chamber should not exceed 0,04 microliter in minute. The intensity of the aqueous humor outflow through the shunts with different parameters does not depend on the shunt length. The shunt with the inner hole radius 0,025 mm is the most safe as it provide the less outflow. The experimental comparative study of the static viscosity of the most widely used viscoelastics in ophthalmological surgery was carried out. It was stated that used in eye surgery viscoelastics on the basis of 1%, 2% and 3% sodium hyaluronate possess the viscosity, that differs in 10 and 100 times and has significant influence on the flow intensity out of the anterior chamber when the new outflow tracts are formed. The mathematically based choice of the most optimal relationship between the viscoelastics physical parameters and the inner hole size of the shunt type glaucoma drainage devices was established. Shunt with the inner hole radius 0,05 mm and simultaneous use of 2% and 3% sodium hyaluronate solution is the most safe for the maintenance of the eye tonus during the first 5 days after glaucoma surgery. The presented correlation allows to increase the safety of the surgical treatment of the patients with the refractory glaucoma
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INFLUENCE OF A WAY OF CRUSHING ON ACTIVITY OF INGREDIENTS OF CONCRETE MIX
DescriptionThe article presents the results of the researches of the influence of a way of crushing on activity of ingredients of concrete mix. It is shown that sand crushing by method of free kick in a planetary mill of AGO-2 allows not only to raise its specific surface, to receive the demanded particle size distribution, but also to improve quality of a surface of particles by removal, destruction of superficial inactive films. On a new surface of sand excess energy concentrates, the active centers are formed and there is a fixing of germs of new growths of products of hydration of cement in a place of an exit of dislocations to surfaces of crystals of sand that leads to substantial increase of chemical activity and reactionary ability of sand
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PRODUCTION PROCESS DESIGN OF FUNCTIONAL FOOD PRODUCTS BASED ON FUNCTIONAL VALUE ANALYSES
DescriptionThe article substantiates the feasibility of the method of functional value analysis application to ensure high efficiency for the production of functional food products. This article describes the design technique of food functionality based on the methodology of value analysis, allowing considering such factors as consumer preferences, nutritional, functional value, economic and technological indicators while developing product formulations and technologies. With the example of flour confectionery functional production there have been developed: structural model for the production of functional food products, the scheme of evaluation of the value functions, with due consideration of consumer preferences
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Description
The goal of the study is to research experimentally a pseudo-noise sequence acquisition method for multicarrier communication systems of MC-DSCDMA, that allows low hardware requirements and able to operate in low quality channels. The way of achieving this lies in using a specially developed computer model of algorithm in Simulink. The achieved results have shown high efficiency of the considered acquisition method in contrast to sequential search method. The proposed algorithm can be used in multicarrier systems for acquisition of aperiodic pseudo-noise sequences in wireless public networks and in military communication networks
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INTEREST IN POLITICS AND PROTEST ACTIVITY OF YOUTH IN THE MIRROR OF EMPIRICAL STUDIES
22.00.00 Sociological sciences
DescriptionIn the article, some results of empirical sociological research of problems of political socialization of youth are discussed. The answers of respondents to questions of interest in policy, the ethnic conflicts and protest activity are analyzed. The main reasons for extremist moods in the youth environment are established
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Description
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
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ANTHROPOGENIC DISTURBANCE RESEARCH OF NATURAL ENVIRONMENT IN THE CONDITIONS OF SANDPITS
06.00.00 Agricultural sciences
DescriptionIn this article, an anthropogenic influence on natural ecosystem such as an excavation of sand is discussed. Investigations were done in Kuyar Forest District of the Mari El Republic on a sandpit. The adjacent plot of natural forest was taken as a control. For evaluation the degree of environment transformation as a result of sand excavation several indicators were used. As indicators of physical soil degradation - thickness of organogenic horizon and soil density; for assessment a chemical degradation – content of main nutrients and humus; as an indicator of biological degradation – the level of active microbial biomass. Besides, a potential phytotoxicity was estimated. The study proved: physical and chemical parameters corresponded with the fourth degree of soil degradation, at the same time, biological parameters approximated to parameters of soil from natural territory
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DEVELOPMENT OF REGIONAL AGRICULTURAL ECONOMY AND THE ROLE OF SMALL FARMS
DescriptionThe economic position of the agricultural sector of the Krasnodar region and the place of small business in economy of the region is considered. It is noted that in structure of agricultural production of the country today the region produces 8%, in gross regional product – about 13% of the total material production. The main share of agricultural production is still produced by agricultural organizations, in 2013, they generated more than 61% of total production, farm population - 24%, domestic farms - 15%. Regional plant growing today produces more than 72% of all agricultural products. In the sphere of animal husbandry, the authors recommend stabilizing dairy herd, to restore the normal functioning of pig farms, build and reconstruct farms and complexes, to increase the supply of quality feeds, to restore the productivity of animals and poultry, the quality level of the staffing industry. It is noted that the production of milk has become a pretty beneficial business; its profitability has risen to 37%. But meat production remains unprofitable due to weak motivation of investing, and problems with lending. There are also serious problems in technical support, especially to the sector of small farm management. As a result, producers suffer from significant financial losses due to the great timing of major agricultural companies. Attention is drawn to the unused opportunities of leasing machinery and equipment, negative policy of low wages for rural workers, and high number of farms which are in bankruptcy proceedings. To increase the stability of development of the agrarian economy, the authors recommend taking into account the peculiarities of financial-economic activity of small rural businesses
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AGITATION LACQUER MINIATURE IN THE HISTORY OF AGRONOMY
DescriptionThe article considers issues related to the history of the popularization of agricultural knowledge by agitation lacquer miniatures. The agitation lacquer miniature in its content and meaning has similarities with such kinds of art as agitation posters, agitation porcelain and agitation textiles. We have discussed issues the emergence of this kind of art. The agitation lacquer miniature or agitlak appeared in Soviet Russia in the 1920s. In the work, we have attempted to analyze one of the most interesting directions of art - propaganda or lacquer miniature agitlak and its role in promoting agricultural knowledge. Agitlak - a term invented by the collector Alexander Andreyevich Dobrovskij, by association with the established terms such as agitporcelain and agit-textile. To achieve this goal the database was created visual images of agitation lacquer miniatures taken from exhibition catalogs, brochures and books. As a tool of the analysis method we have used sketches or visual notes. To use lacquer miniatures as resource information for popularization agricultural knowledge in Russia in the period from 1920 to 1970 there are several topics: change of manual labor by mechanized, types of agricultural works, harvesting, growing of different cultures, experience exchange, attracting the pioneers in the agricultural sector - opytnichestvo. In the work we have shown the history of the development of agitation lacquer miniature, goals and objectives, an illustrative number of samples as well as analyzed lacquer miniatures with scenes of agricultural production
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PRIMARY PROCESSING OF CHINCHILLA PELTS
DescriptionThe article represents the results of the study of existing technologies of primary processing of pelts of chinchillas, including killing, pelting, shaping, trimming, dressing, drying, preserving and storage of skins used at fur farms in Europe, North and South America