17 research outputs found

    Development of mathematical model of the system of small businesses

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    The purpose of this work is to develop the model and quantitative parameters of the system of small enterprises. The processes of small business development should be identified, formalized and presented in the form of a mathematical model, allowing the use of forecasting and regulation of the system of small enterprises. Mathematical and statistical research of quantitative changes in the small business system under the influence of various external factors. The indicators most adequately reflecting small business development have been established. External factors that have a predominant influence on the development of small businesses are identified. A mathematical model of a small business was developed. The tools of the conducted research can be used in different countries to improve the level of regulation and forecasting of the system of small enterprises. Developed a mathematical model for development of the system of small enterprises

    cis-Bis(2,2′-bipyridine-κ2 N,N′)bis­(dimethyl sulfoxide-κO)zinc bis­(tetra­phenyl­borate) dimethyl sulfoxide monosolvate

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    In the mononuclear title complex, [Zn(C10H8N2)2(C2H6OS)2](C24H20B)2·C2H6OS, the ZnII ion is coordinated by four N atoms of two bidentate 2,2′-bipyridine mol­ecules and by the O atoms of two cis-disposed dimethyl sulfoxide mol­ecules in a distorted octa­hedral geometry. The S atom and the methyl groups of one of the coordinated dimethyl sulfoxide mol­ecules are disordered in a 0.509 (2):0.491 (2) ratio. The crystal packing is stabilized by C—H⋯O hydrogen bonds between the dimethyl sulfoxide solvent mol­ecules and tetra­phenyl­borate anions

    Дослідження переробки нікель-кобальтвмісних металургійних відходів екологічно безпечним способом водневого відновлення

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    We studied kinetic patterns of hydrogen reduction of the scale of a nickel-cobalt containing precision alloy at a temperature of 673‒1573 K over a period from 0 to 180 minutes. The highest degree of reduction was achieved after thermal treatment at 1273 K – 99 %. This is predetermined by the intensification of reduction processes and a sufficient level of porosity, which ensures satisfactory gas exchange. It was discovered that the starting scale consists mainly of Fe3O4, Fe2O3 and FeO with atoms substituting their alloying elements. The target product of metallization had a sponge-like microstructure and consisted mainly of the solid solution of Co and Ni atoms in γ-Fe and the residual non-reduced Fe3O4 and FeO. The resulting phases had no noticeable susceptibility to sublimation.This has ensured a reduction in the losses of alloying elements while receiving and using the highly-alloyed metallized scale, which was confirmed by experimental- industrial tests. At the same time, recycling of industrial wastes contributes to a reduction in the technogenic intensity of industrial regions and improves ecological safety of the environmentИсследована кинетика водородного восстановления окалины никель-кобальтсодержащего прецизионного сплава. Целевой продукт металлизации после восстановления при 1273 K имел губчатую микроструктуру, преимущественно состоял из твердого раствора атомов Ni и Co в γ–Fe. Также выявлен остаток Fe3O4 и FeO. Опытно-промышленные испытания подтвердили эффективность использования новой легирующей добавки с параллельной утилизацией техногенных отходовДослідженно кінетику водневого відновлення окалини нікель-кобальтвмісного прецизійного сплаву. Цільовий продукт металізації після відновлення при 1273 K мав губчасту мікроструктуру, переважно складався з твердого розчину атомів Ni та Co в γ–Fe. Також виявлено залишок Fe3O4 та FeO. Дослідно-промислові випробування підтвердили ефективність використання нової легуючої добавки з паралельною утилізацією техногенних відході

    Influence of single physical loads of different intensity on the secretory activity of athletes blood neutrophils and monocytes

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    The article studies the impact of one-time physical activity of varying intensity on the secretory activity of neutrophils and monocytes in the blood of athletes of different sports specialization. Found that a single physical load average and peak levels experienced by athletes involved in aerobics, football and ran middle distance, cause a similar decrease in the expression of the secretory activity of neutrophils and monocytes in the blood, which is a decrease in the secretion of IL-1β, IL-6, IL-8, TNF-α and αIFN. Single physical loads threshold adverse effect on the functional activity of neutrophils and monocytes in athletes of different specialization do not have

    Development of mathematical model of the system of small businesses

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    The purpose of this work is to develop the model and quantitative parameters of the system of small enterprises. The processes of small business development should be identified, formalized and presented in the form of a mathematical model, allowing the use of forecasting and regulation of the system of small enterprises. Mathematical and statistical research of quantitative changes in the small business system under the influence of various external factors. The indicators most adequately reflecting small business development have been established. External factors that have a predominant influence on the development of small businesses are identified. A mathematical model of a small business was developed. The tools of the conducted research can be used in different countries to improve the level of regulation and forecasting of the system of small enterprises. Developed a mathematical model for development of the system of small enterprises

    Thermoelectric properties and cost optimization of spark plasma sintered n-type Si0.9Ge0.1 - Mg2Si nanocomposites

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    We report on thermoelectric properties of low Ge content n-type Si0.9Ge0.1–Mg2Si nanocomposite. Introduction of the Mg2Si phase into a SiGe matrix resulted in a dramatic drop of the lattice thermal conductivity beyond the previously reported lowest limit for SiGe alloys due to intensification of phonon scattering on SiGe–Mg2Si grain boundaries. For a sample doped with 1 at.% of Mg2Si, the peak value of thermoelectric figure of merit ZT reached ~ 0.8 at 800 °C. Sintered nanocomposites still exhibit high thermoelectric performance while being almost two times cheaper than Si0.8Ge0.2

    Лечение кошек при холангиогепатите

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    Acute bacterial cholangiohepatitis of cats is a common disease associated with the inflammation of bile ducts and liver parenchyma, characterized by development of a pronounced hepatodepressive syndrome (hypoalbuminemia), cytolysis (increase in serum activity of alanine and asparagine transaminase), cholestasis (increase in serum concentration of bilirubin, cholesterol, activity of alkaline phosphatase and gamma-glutamyltranspeptidase), intoxication, dehydration, mesenchymal- inflammatory and pain syndromes. The aim of the research was to study the effectiveness of treatment for acute bacterial cholangiohepatitis in cats with average severity of the pathology course. According to inclusion and exclusion criteria, the study included a cohort of cats (n = 12) with acute bacterial cholangiohepatitis. Clinical, hematological, ultrasonographic, statistical methods of investigation were used in this work. For sick cats with medium severity form of cholangiohepatitis, when administered as a complex therapy the combination of marbofloxacin, metronidazole, ursodeoxycholic acid, cyancobolamine, tocopherol acetate, infusion therapy also had a good therapeutic effect, which was accompanied by improved clinical and laboratory performance. In the blood of cats with cholangiohepatitis, in the background of intensive therapy, there was a significant decrease in white blood cell count, erythrocyte sedimentation rate, and in serum, there was an increase in albumin concentration, reduction of creatinine, aminotransferase activity, alkaline phosphatase, gamma- glutamyltranspeptidase, lipase.Острый бактериальный холангиогепатит кошек представляет собой чрезвычайно распространенную патологию, связанную с воспалением паренхимы печени и желчных протоков, характеризующуюся развитием гепатодепрессивного синдрома (гипоальбуминемии), цитолиза (повышение активности аспарагиновой и аланиновой трансаминазы в сыворотке крови), холестаза (повышение сывороточной концентрации билирубина, холестерина, активности гамма-глутамилтранспептидазы и щелочной фосфатазы), интоксикации, дегидратации, мезенхимально-воспалительного и болевого синдромов. Цель исследования - изучить эффективность лечения кошек с острым бактериальным холангиогепатитом при средней степени тяжести течения патологии. Согласно критериям включения и исключения в исследование проводили на группе кошек (n = 12) с острым бактериальным холангиогепатитом. Использовали клинические, гематологические, ультразвуковые, статистические методы исследования. У больных кошек при средней форме холангиогепатита при назначении в составе комплексной терапии комбинация метронидазола, марбофлоксацина, урсодезоксихолевой кислоты, токоферола ацетата, цианкоболамина при инфузионном введении оказывала хороший терапевтический эффект, что сопровождалось улучшением клинико-лабораторных показателей. В крови кошек с холангиогепатитом на фоне интенсивной терапии наблюдалось достоверное снижение количества лейкоцитов, скорости оседания эритроцитов, а в сыворотке крови - повышение концентрации альбумина, снижение активности аминотрансферазы, гамма-глутамилтранспептидазы, щелочной фосфатазы, липазы, концентрации креатинина
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