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Almaty, Kazakhstan

Athar T.,Indian Institute of Chemical Technology | Abdelaal M.,Prince Sultan University | Abdelaal M.,Academy of Civil Aviation | Khatoon Z.,The Interdisciplinary Center | And 7 more authors.
Sensors and Materials | Year: 2015

Green synthesis of NiSnO3 nanopowder was carried out via chemie douce using nickel and tin chlorides as precursors by stirring and refluxing at 80 °C. The dried dark green bimetallic oxide nanoparticle was then used for preparing the sensing electrode in the form of a screen-printed electrode (SPE). The synthesized nanoparticles were analyzed for elemental, structural, and morphological characteristics using various analytical techniques. The Fourier transform infrared (FTIR) spectrum indicated the formation of a strong Sn-O-Ni framework, while X-ray diffraction (XRD) confirmed the formation of a bimetallic oxide nanopowder of NiSnO3. The synthesized nanoparticles were studied for hydroquinone (HQ) sensing characteristics to develop a sensitive and reproducible electrochemical sensor from 1 to 9 mM concentrations in buffer. The developed sensor exhibited a sensitivity of 6.03 μA/mM (46.38 μA/mMcm-2). The charge transfer studies indicated a reversible and diffusion-controlled process. To the best of our knowledge, such a material, i.e., NiSnO3, has not be used for HQ sensors and is being reported for the first time. © MYU K.K. Source


Kunelbayev M.,Kazakh State Teacher Training University | Mekebaeyev N.,Kazakh State Teacher Training University | Kabdoldina A.,Kazakh National Technical University | Seidildayeva A.,Academy of Civil Aviation | Silnov D.S.,National Research Nuclear University MEPhI
Journal of Theoretical and Applied Information Technology | Year: 2016

This paper considers the technique for studying the testing of tubular solar collector in a lab. Today, there are several ways methods of using solar collectors. When using the first method, the following values are measured: Coolant flow, difference between the temperatures of the collector coolant fluid at the collector inlet and outlet and the density of the incident solar radiation flux. Here, all these values are measured simultaneously and under quasi-stationary mode. Much of the research is related to testing of collectors in field conditions using the instant method. At the end of the tests, the product of the total heat loss coefficient of the collector and efficiency coefficient of the absorption panel was determined. The heat output of the collector was also measured. As is seen from experimental methods of testing tubular solar collector, the tubular collector with an absorbing screen decreases from 0.8 to 0.17 when water is supplied at the inlet 20°C, 30°C, 40°C and 50°C, while the efficiency of the tubular collector with a reflector increases from 0.17 to 0.68 when water is supplied at the inlet 20°C, 30°C, 40°C, and then decreases to 0.4 at t1-50°C. It is obvious that the efficiency of heat absorption and transfer as a result of thermal conductivity is much higher than the capturing and reflection of sunlight by the absorbing pipe. However, both the cost and labor input involved in the manufacture of the above tubular collector with an absorbing screen is higher. © 2005 - 2016 JATIT & LLS. All rights reserved. Source


Ongdash A.O.,Al-Farabi Kazakh National University | Ongdashuly E.,Al-Farabi Kazakh National University | Amandosuly B.,Al-Farabi Kazakh National University | Chukubayev Y.S.,Al-Farabi Kazakh National University | And 5 more authors.
Biosciences Biotechnology Research Asia | Year: 2015

The article deals with the essence of "natural resource potential" and "natural resources" concepts. The main tendencies in the strategy of the economic growth of the world economy are revealed. Ways for the world economy development are offered basing on the natural resource potential preservation. The "green economy" concept directly relating to effective use of natural resources is considered. Source

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