Relationship between Kinematic Points and Deformable Surface Tension in the Area Contact and Force Deformation in Rolling Roller for Elastic Plastic Surface
Автор(ы): Beisembetov I. K.*Oteny Y. N.*Muraviev O. P.*Sikhimbayev M. R.*Absadykov B. N.*Arymbekov B. S.*Ussupov S. S.*Sherov K. T.*Tkacheva Y. O.*
Реферат: The article examines the relationship of the kinematics of the deformable surface points with the stresses in the contact zone of deformation and strength rolling clip elastic and plastic surfaces. There is shown the features of deformation of two cylindrical bodies with identical elastic properties of solids and elastic plastic deformation. The features of deformation of the work piece surface during rolling on the roller surface of the elastic-plastic are determined. A scheme for determining the kinematics of the points of the deformable surface rolling on the cylindrical surface of the roller without slippage is specified. The dependences of the radial and tangential stresses on the front surface of the roller which is resulting voltage changes depending on the half-width of the contact zone at the front of the video shows the main features of the process of elastic-plastic deformation. We present the variation of the efforts of the deformation of the radius and the radius of the roller parts for different values of the depth of penetration and changes in the deformation force on the depth of the introduction of video for different values of the radius of the workpiece.
Self-healing coatings based on halloysite clay polymer composites for protection of copper alloys
Автор(ы): Abdullayev E.*Abbasov V.*Tursunbaeva A. K.*Portnov V.*Ibrahimov H.*Mukhtarova G.*Lvov Y.*
Реферат: Halloysite clay nanotubes loaded with corrosion inhibitors benzotriazole (BTA), 2-mercaptoben-zimidazole (MBI), and 2-mercaptobenzothiazole (MBT) were used as additives in self-healing composite paint coating of copper. These inhibitors form protective films on the metal surface and mitigate corrosion. Mechanisms involved in the film formation have been studied with optical and electron microscopy, UV-vis spectrometry, and adhesivity tests. Efficiency of the halloysite lumen loading ascended in the order of BTA < MBT < MBI; consequently, MBI and MBT halloysite formulations have shown the best protection. Inhibitors were kept in the tubes buried in polymeric paint layer for a long time and release was enhanced in the coating defects exposed to humid media with 20-50 h, sufficient for formation of protective layer. Anticorrosive performance of the halloysite-based composite acrylic and polyurethane coatings have been demonstrated for 110-copper alloy strips exposed to 0.5 M aqueous NaCl for 6 months.
Инновационная деятельность как способ адаптации предприятий к рыночной среде
Реферат: В статье рассмотрены особенности адаптации градообразующих предприятий Казахстана к работе в условиях рыночной экономики с позиции их инновационной деятельности. Выявлены механизмы и способы адаптации, присущие предприятиям с учетом специфики казахстанской экономики в условиях трансформации экономической среды. Показана роль государственного регулирования инновационной политики предприятия.
Роль государственного регулирования инновационной деятельности промышленных предприятий Казахстана
Реферат: В последние годы возросла роль государства в развитии и поддержке инновационной сферы, которая обусловлена его участием в решении проблем научно-технического развития. В статье акцент сделан на государственной поддержке инновационной деятельности предприятий реального сектора экономики Республики Казахстан, создании условий для внедрения ими инноваций. Приведены конкретные результаты роста инновационной активности предприятий одного из ведущих промышленных регионов страны.
К вопросу инвестиционной активности промышленных предприятий Казахстана
Реферат: В статье приводятся результаты анализа инвестиционной деятельности промышленных предприятий Казахстана в 2007-2011гг. Внимание акцентировано на направлениях инвестиционной деятельности, источниках финансирования инвестиций в основной капитал и технологической структуре инвестиций. Выявлены наиболее востребованные механизмы привлечения инвестиций в реальный сектор экономики. Показана роль государственного регулирования инвестиционных процессов, приведены конкретные инвестиционные решения. Сформулированы приоритетные направления деятельности государственных органов в области привлечения прямых иностранных инвестиций в экономику Казахстана.
Cyclic voltammetry and impedance studies of undoped diamond films
Реферат: The undoped, polycrystalline diamond films were deposited on tungsten wire substrates by hot filament chemical vapor deposition (HF CVD), using a precursor gas mixture of methanol with excess of hydrogen. The morphology and quality of the as-deposited films were monitored by scanning electron microscopy (SEM) and Raman spectroscopy. The surface morphology analyzed by SEM resembles a continuous and well faceted diamond film. Raman results showed essential differences in qualities of diamond films grown at different hydrocarbon concentrations. The electrochemical properties of diamond electrodes were examined with cyclic voltammetry (CV) and the electrochemical impedance spectroscopy (EIS). The CV experiments revealed a large chemical window (>_4.3 V) of undoped diamond. Analysis of the ferrocyanide-ferricyanide couple at a diamond electrode suggests some extent of electrochemical quasi-reversibility, but the rates of charge transfer across the diamond substrate interface vary with diamond quality.
The Undoped CVD Diamond Electrode: The Effect of Surface Pretreatment on its Electrochemical Properties
Ключевые слова: электроды алмазные*химическое осаждение паров*эффективность электрохимического применения электрода*
Реферат: CVD diamond electrodes have been extensively studied in recent years, from the point of view of fundamental electrochemical properties as well as that of applications. Diamond electrodes are found to be attractive for electrochemical applications due to their physical, chemical, and electronic properties, e.g. high thermal conductivity; high hardness, and chemical inertness; a wide electrochemical potential window in aqueous and non-aqueous media; a very low capacitance and a very high electrochemical stability.
Immune Morphological Changes in the Body of Kazakh White Rock Calves after Vaccination and isoniazid Drug Application
Реферат: The stud was conducted on monthly Kazakh white rock calves of LTD Izdenis farm of West Kazakhstan region. Taskalinski district, to determine immune morphological, pathological changes in the organs and tissues of Kazakh white rock calves after application of BCG vaccine and isoniazid drug. When the BCG vaccine and isoniazid (tubazid) drug were used in combination, the distinet chage was observed in the number of T and B-lymphocytes. Their number increased from the first day of using and lasted one year. Combined use of BCG vaccine and isoniazid (tubazid) drug led to an immune morphological change of the internal organs and the emergence of a strong immunity to tuberculosis for l year. Immune morphological changes were detected at the site of BCG vaccine and in the right (submandibular, parotid) lymph nodes and local lymph nodes, kidneys, liver and lungs. Changes in parenchyma organs (liver, kidney and myocardium) were observed in the form of grain and fatty infiltration of hepatocytes. Hyperchromate and diploid nucleur were found in the cells of liver Hepatocytes increased in volume.
Особенности предпосадочной подготовки семян при выращивании картофеля в засушливые годы в условиях Приуралья
Автор(ы): Шауленова А.*Рабаев М.*
Объем документа: С. 32-36
МРНТИ: 68.35.49
Ключевые слова: выращивание картофеля*способы подготовки семян картофеля*
Реферат: В статье отражено влияние экстремального лета на качество произведенного в области картофеля. Крайности погодных условий (жара, засуха, суховейные ветра) привели к стрессам у растений. В работе описаны наиболее распространенные способы подготовки семян картофеля к посадке в условиях таких лет.
To the synonymy of Angaracris barabensis (Pallas, 1773) (Orthoptera, Acrididae) with clarifying the peculiarities of its feeding and distribution
Автор(ы): Чильдебаев М. К.*Темрешев И. И.*Колов С. В.*
Реферат: The specimens of Angaracris barabensis (Pallas, 1773) with dark hind wings are found beside specimens with light wings in the same locality of Pavlodar region in Kazakhstan. New synonymy is proposed: Angaracris barabensis (Pallas, 1773) = Angaracris nigripennis Lian et Zheng, 1984, syn. n. New data on nutrition and distribution of A. barabensis in Kazakhstan are given.