КАФЕДРА ЮНЕСКО ПО УСТОЙЧИВОМУ РАЗВИТИЮ
Статьи, опубликованные в журналах Q1-Q2 за 2017-2021 годы
ФАКУЛЬТЕТ ГЕОГРАФИИ И ПРИРОДОПОЛЬЗОВАНИЯ
КАФЕДРА ЮНЕСКО ПО УСТОЙЧИВОМУ РАЗВИТИЮ
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№ |
Название статьи |
Авторы |
Год |
Название журнала |
Краткая аннотация |
Ссылка |
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1 |
Study of the Effect of Rocket Fuel on Plant Communities Growing at Sites of Launch Vehicles Separating Parts Fall
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Atygayev A.B., Mukanova G.A., Bazarbayeva T.A., Kurbatova N.V., Zubova O.A., Yerekeyeva S.
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2021
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Journal of Ecological Engineering
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The article presents the results of a study of synthesis and accumulation of heptyl in the plants growing on the soil contaminated with rocket fuel. The study was carried out under laboratory conditions of al-Farabi Kazakh National University. The results of the experiments confirmed that certain concentrations of a rocket fuel-heptyl (unsymmetrical dimethylhydrazine, UDMH) are not toxic for the crested wheatgrass, Agropyronpectiniforme Roem.et Schult., Kentucky bluegrass, Poapratensis L., and tarragon, Artemisia terraе-albaеKrasch., although they can cause anatomical and morphological changes in the roots and leaves of the plants grown on the soil contaminated with UDMH., |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85113362841&origin=resultslist |
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2 |
Modern sediment
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B.Yedilbayev, A.Brener,
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2021
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Transport and
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The work deals with the mathematical modeling of traffic phenomena. The submitted model is based on a prospective analogy of some described phenomena with particle sedimentation. Both the qualitative analysis of the model and the numerical experiment is carried out. Qualitative results of the research have been compared with the known data of supervision of the traffic on city highways. As a result, the main control parameters which can use for optimal traffic management are highlighted and justified. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85114037174&origin=resultslist |
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3 |
The green space
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Minzhanova, G., Pavlichenko, L.,
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2021 |
Geojournal of tourism
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The theory of urban ecology tries to enhance the positive aspects of green space for humans, while at the same time decreasing the negative aspects of cities for the environment. These benefits are reflected in economic terms as they have a positive effect on real estate values, investment, tourism and the quality of life. In this study urban green space is defined as all urban land covered by vegetation of any kind. This covers vegetation on private and public grounds, irrespective of size and function, and can also include small water bodies such as ponds, lakes or streams. This study aims to find the relationship between green space abundance and social impact in particular on academic progress in Almaty city, South Kazakhstan. Data on green space, academic average point score, and nine possible confounding variables were collated. Multiple linear regression analysis was performed. Multivariate data analysis was performed to produce scatter plots that include regression lines. |
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4 |
Purification of Oil-Containing
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М. Abdibattayeva,
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2021 |
Безопасность труда в промышленности.
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Significant oil losses in oil-containing wastes and their adverse impact on the region environmental setting bring about the need to develop an oil-containing wastes treatment technology. To tackle this issue, the authors have set an aim of designing a helio device and creating an oil-containing wastes treatment method based on it to extract oil products. Considering a widespread in the composition and properties of potential oil sludge raw materials and their tendency for either formation of stable emulsions or phase separation, we have conducted in-depth modern physical and chemical studies and defined the need to develop a commercial oil-containing wastes purification method |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85106661058&origin=resultslist |
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5 |
Tuning the Nanoporous
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Barzegar F.
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2021 |
ACS Applied Energy Materials
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Controlling the porosity of carbon-based electrodes is key toward performance improvement of charge storage devices, e.g., supercapacitors, which deliver high power via fast charge/discharge of ions at the electrical double layer (EDL). Here, eco-friendly preparation of carbons with adaptable nanopores from polymers obtained via microwave-assisted cross-linking of poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) is reported. The polymeric hydrogels possess porous and foam-like structures, giving excellent control of porosity at the precursor level, which are then subjected to activation at high temperatures of 700-900 °C to prepare carbons with a surface area of 1846 m2 g-1 and uniform distribution of micro-, meso-, and macropores. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85100321540&origin=resultslist |
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6 |
Revisiting the carbon
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Pavlenko V., Kalybekkyzy S.,
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2021 |
Ionics
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The important role of mesopores has been investigated in electric double-layer capacitors (EDLCs) operating from 24 °C down to − 40 °C by using two in-house synthesized carbons with hierarchical porosity. These carbons were prepared from colloidal nanoparticles of SiO2 as the template and d-glucose as the carbon source. A decrease in the average diameter of the nanoparticles from 12 to 8 nm results in increased surface area and offers a perfect match between ions of binary mixture of imidazolium-based fluorinated ionic liquids and the pores of carbon. Short-range graphene layers produced with 8-nm silica nanoparticles lead to the creation of transport channels which better accommodate ions. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85118582487&origin=resultslist
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7 |
In Vivo Comparison of Chlorine-Based Antiseptics versus Alcohol
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Zh.Myltykbayeva, G.Kovaleva, A.Mukhitdinov, S.Omarova and R.Nadirov;
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2020 |
Hindawi Scientifica Volume |
Despite being commonly used as effective preparation for surgical hand antisepsis, alcohol solutions have major drawbacks, such as drying effect, emergence of hand eczema, and other diseases. (is study aimed to demonstrate the effectiveness of sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) as antiseptic in comparison to single sodium hypochlorite and 70% ethanol. In 5-day tests, the effects of 3 antiseptics were established according to standard test methods. (e antiseptics were applied to the hands of 82 volunteers, and samples of bacteria were collected on days 1 and 5, immediately after drying and 6 hours later after antiseptic application. Student’s t test and ANOVA were applied in a statistical study. (e NaOCl with H2O2 composition demonstrated noninferiority to both sodium hypochlorite only and alcohol products and superiority to these antiseptics on day 5 (P < 0.05 at a significance level of 5% for each comparative trial in this day) at equivalence margin of 20%. (e effectiveness of the NaOCl plus H2O2 composition as an antiseptic was explained by the formation of singlet oxygen in the system. Together, these data suggest that NaOCl and H2O2 may be an effective hand antisepsis that avoids the drawbacks seen with alcohol solutions. |
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8 |
Quality of Drinking Water in the Balkhash District of
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S.Nurtazin,S.Pueppke,T.Ospan , A.Mukhitdinov and T. Elebessov;
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2020 |
Water |
The thinly populated Balkhash District of Kazakhstan’s Almaty Region lies in the lower reaches of the Ili-Balkhash basin, which is shared by China and Kazakhstan. The district is arid and heavily dependent on inflows of surface water, which are threatened by the e |
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9 |
Study of the thermophysical and physical - mechanical properties
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Zhumadilov.A.Zh, Kaldybayeva,.S; Nuruldaeva.G.Zh ; Kumar D.B
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2019 |
Periódico Tchê Química |
Highly alloyed alloys, in which expensive chromium and nickel are alloying elements, are widely used as heat-resistant materials. Their total content in heat-resistant alloys reaches 30% or more. However, the life of working parts made of heat-resistant alloys is limited. Moreover, the higher the operating temperature, the shorter it is. This leads to increased costs for maintaining the units in working condition. Examples of such parts are the grate of agglomeration machines, details of boiler plants, roasting, heating, and glass melting furnaces, casting molds, exhaust manifolds of forced automobile engines, etc. In this regard, reducing the cost of heatresistant products, while maintaining their operating characteristics and life, becomes very actuality. One of the promising options to solve it is to manufacture these parts made of high-alloyed heat-resistant aluminum cast iron CHYU22SH (CHYU22SH - standard cast iron). Castings made of cast iron CHYU22SH differ, first of all, by being heat resistance at high temperatures in air (up to 1100 °C) and in media containing sulfur, sulfur dioxide, oxides of vanadium, and water vapor. In addition, they can functionally operate as a wear-resistant product having high strength at normal and elevated temperatures. The paper presents the thermal and mechanical properties of casting, as well as the results of microstructure analysis of aluminum cast irons. |
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10 |
Pvc and polietilentereftalat in the processes of combustion with
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Tulepov M.I., Spanova G.A., Tleuberdi E., Pustovalov I.A., Tureshova G.O., Golovchenko O.Yu., Aknazarov S.Kh., Zhunussova K.Z., Abdrakova F.Yu., Baiseitov D.A;
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2019 |
Procedia Computer Science |
For particles of binders – gas chlorvinyl is characterized by the consolidation of particles into a solid polymer phase with a slight increase in temperature due to adhesion and the formation of larger aggregates – polymer coagulants, which is accompanied by physicochemical and thermal processes such as adsorption, adhesion, coagulation and the formation of new phases. Thus, the interfacial interaction between the surface of the coal and gaseous vinyl chloride results in the contact of condensed matter of different nature, and the adhesion of PVC in the presence of coal particles provides between the particles of the briquettes the connection of a certain strength through physical or chemical molecular forces.To produce durable briquettes were also used supplements polyethylene terephthalate improves the calorific value and energetic properties of the resulting briquettes. Experiments with different concentrations of polyethylene terephthalate showed that with increasing concentration of this binder, the calorific value of briquettes is increased linearly. |
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11 |
Melting point depression of ionic liquids by their confinement in carbons of controlled mesoporosity |
Béguin F. Pavlenko V., Przygocki P., Pawlyta M., Ratajczak P.;
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2020 |
The effect of ionic liquids (ILs) confinement in the nanoporosity of carbons on their low temperature transitions has been studied by differential scanning calorimetry. The ILs consisted of the [EMIm+] cation and [FSI−], [TFSI−] or [BF4−] anions. The carbons were strictly microporous (Maxsorb) and mesoporous with a small amount of micropores, i.e. a MgO templated carbon TC-1 (Lmeso = 3.4 nm), a silica templated carbon TC-2 (Lmeso = 8.7 nm), and a high surface area carbon black SC2A (Lmeso = 9.6 nm). All ILs encapsulated in the microporous Maxsorb demonstrated “flat” low temperature thermograms typical of an adsorbed state. In the narrow mesopores of TC-1, the interactions between the ions and the pore walls constrained the molecular motions, leading to a glass transition upon heating. The three confined ILs in SC2A displayed a melting peak at lower temperature (ΔTm ∼ -30 °C) than their neat counterpart. The ΔTm shift was comparable for TC-2 soaked with [EMIm+] [FSI−], whereas only a glass transition was given by [EMIm+] [TFSI−] and [EMIm+] [BF4−] confined in this carbon. Overall, the work shows that the liquid state of ILs can be extended to lower temperatures by their confinement in carbons possessing relatively wide mesopores. © 2020 Elsevier Ltd |
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12 |
Fitting the porous texture of carbon electrodes to a binary ionic liquid electrolyte for the realization of low temperature EDLCs |
Pameté Yambou E., Gorska B., Pavlenko V., Beguin F. |
2020 |
We report on electrical double-layer capacitors (EDLCs) operating effectively at low temperature (down to −40 °C) while implementing nanoporous carbon electrodes and an ionic liquid (IL) electrolyte. For this purpose, the binary mixture of [EMIm][FSI] and [EMIm][BF4] in 1:1 mol ratio has been selected, since it has been previously shown that it remains liquid down to its vitrification at −97 °C, unlike the parent ILs with melting points of −13 °C and 14 °C, respectively. To enhance the mass transport of the IL ions, especially at a low temperature, where the IL electrolyte exhibits a high viscosity, carbon electrode materials with a substantial share of mesopores serving as passageways for bulky ions were selected. These were a carbon black (SC2A) with a broad range of interparticle mesopores in addition to a reasonable amount of micropores, as well as a home-made templated carbon (MP98B) with hierarchical porous texture made of interconnected micropores and well-defined mesopores. From 20 to −40 °C, the capacitor with MP98B electrodes displayed greater specific capacitance, energy and power as well as better charge propagation than the cell with SC2A, whereas on volumetric basis its performance was inferior due to lower electrode density. Advanced SCMP composite electrodes of intermediate density were formulated by mixing these two carbons in the 1:1 mass ratio and harnessed to realize EDLCs with enhanced both specific and volumetric energy. Owing to the adjusted electrode properties, the performance of SCMP-based EDLCs surpassed literature data obtained with analogous constructions based on IL electrolytes and lightweight mesoporous materials, which suffered from poor volumetric metrics. |
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13 |
Towards an optimized hybrid electrochemical capacitor in iodide based aqueous redox-electrolyte: Shift of equilibrium potential by electrodes mass-balancing
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Abbas Q. Fitzek H., Pavlenko V. Gollas B.; |
2020 |
Considering the cost-effectiveness, safety, and environmental friendliness for energy storage and delivery at high rates, hybrid electrochemical capacitors in aqueous electrolytes containing redox-active species are attractive alternatives to expensive organic electrolyte based electric double-layer capacitors (EDLCs). Here, the influence of electrode mass-balancing on the equilibrium potential of hybrid cells in aqueous sodium nitrate + sodium iodide (5 mol L−1 NaNO3 + 0.5 mol L−1 NaI) has been investigated. The shift of equilibrium potential determines, whether the positive electrode behaves fully battery-like (charge/discharge strictly in the iodide redox potential range) or shows a mixed battery-like and EDL capacitive behavior. With an appropriate mass-balancing of the positive and negative electrodes (mass ratio = 1:2), the equilibrium potential shows a negligible shift during galvanostatic charge/discharge cycles at 0.5 A g−1, which results in full battery-like behavior of the positive electrode. Consequently, the hybrid cell exhibits stable electrochemical performance. By contrast, an equal or higher mass of the positive compared to the negative electrode, leads to a shift of the equilibrium potential resulting in two different charge storage mechanisms at the positive electrode. As a result, the overall performance of the hybrid cell deteriorates. We show by thermogravimetric analysis and Raman spectroscopy that the formation of polyiodides (I3 − and I5 −) is controlled by the oxidation of iodide (I−) anions to molecular iodine in nanoporous carbon based positive electrode, and that more polyiodides are produced, if the positive electrode operates strictly within the iodide/iodine redox potential range. |
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14 |
Pvc and polietilentereftalat in the processes of combustion with substandard coal |
Tulepov M.I., Spanova G.A., Tleuberdi E., Pustovalov I.A., Tureshova G.O., Golovchenko O.Yu., Aknazarov S.Kh., Zhunussova K.Z., Abdrakova F.Yu., Baiseitov D.A;
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2019 |
Procedia Computer Science |
For particles of binders – gas chlorvinyl is characterized by the consolidation of particles into a solid polymer phase with a slight increase in temperature due to adhesion and the formation of larger aggregates – polymer coagulants, which is accompanied by physicochemical and thermal processes such as adsorption, adhesion, coagulation and the formation of new phases. Thus, the interfacial interaction between the surface of the coal and gaseous vinyl chloride results in the contact of condensed matter of different nature, and the adhesion of PVC in the presence of coal particles provides between the particles of the briquettes the connection of a certain strength through physical or chemical molecular forces.To produce durable briquettes were also used supplements polyethylene terephthalate improves the calorific value and energetic properties of the resulting briquettes. Experiments with different concentrations of polyethylene terephthalate showed that with increasing concentration of this binder, the calorific value of briquettes is increased linearly. |
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15 |
CO2 Adsorption under Dynamic Conditions: An Overview on Rice Husk-Derived Sorbents and Other Materials |
V. Gargiulo, M. Alfè, F. Raganati, A. Zhumagaliyeva, Y. Doszhanov, P. Ammendola & R. Chirone |
2019 |
CO2 adsorption on solid sorbents under dynamic conditions is driven by a number of factors, among them textural features (pore volumes, pore size distribution, surface area…), surface chemistry (polarity, presence of active site and/or unsaturated coordinative sites…) and the overall active sites accessibility. Depending on the strength of the interaction with CO2 (chemisorption or physisorption), solid sorbents are broadly divided in two groups, although a sharp distinction between the two phenomena (in many cases concurrent) is obviously not possible. CO2 adsorption data acquired in a lab-scale fixed bed reactor under dynamic conditions and in typical conditions of post-combustion CO2 capture on materials produced from the work-up of carbonized rice husk were here reported and compared with pertinent literature on commercial and adhoc synthetized sorbents. Some attempts to correlate adsorption capacities and materials’ textural properties or other relevant adsorption parameters have been also proposed. |
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16 |
Development of gas-generator chemical cartridges working in the mode of non-explosive destructive mixture |
M. I. Tulepov, Sh. E. Gabdrashova, N. M. Rakhova, L. R. Sassykova, D.A. Baiseitov, Zh. Elemesova, M. A. Korchagin, S. Sendilvelan, I. O. Pustovalov and Z.A. Mansurov.
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2018 |
Rasayan J. Chem |
The work aim was the choice of technology that provides the possibility of destruction of various construction objects without the creation of shock, seismic waves, fragmentation, dust formation, concomitant detonation crushing with minimal emission of harmful substances. Preparation of the gas-chemical cartridges containing carbon nanomaterials was the result of researches. The composition of the non-explosive destructive mixture based on materials of Kazakhstan origin developing expansion force in a closed volume up to 30 MPa is developed. A composition of a fast-hardening mixture having a hardening rate of 8 MPa/h is created. The maximum level of strength of cement stone non-explosive breaking mixture for 30 min. hardening reaches 23 MPa. The hardening time of fast-hardening mixtures with a non-explosive breaking mixture was 15-20 min. In the case of using gas-chemical cartridges of the developed composition, the role of the carbon nanomaterial in it was determined by the low combustion rates of the composition and, very importantly, by slow ignition (the combustion of a single cartridge lasts up to 0.3 s under blasthole conditions). As a result of the carried out researches, it was found out that the range of scattering of splinters of concrete will depend on the amount of gas-generator composition, of its chemical composition and the burning rate. |
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17 |
Kinetics of polychlorinated biphenyls in bactrian camels |
Jurjanz, S., Nurseitova, M., Toregozhina, Z., Konuspayeva, G., Faye, B.
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2018 |
Emirates Journal of Food and Agriculture
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The study aimed to determine the accumulation and depuration of polychlorinated biphenyls (PCBs) in Bactrian camels. Four lactating, two-humped camels (Camelus bactrianus) received 0.8 mg PCBs (1.3 μg/kg body weight) daily for 56 days. Then, the depuration of the animals was monitored for the next 4 months. Milk, blood and hump fat of the camels were sampled every 2 weeks and analyzed. Body weight increased significantly, from approximately 550 to 613 kg, by the end of the study. The fat mass in the humps initially decreased (-2.3 kg, P < 0.05) then increased at the end of the depuration period (+2.0 kg, P < 0.05). At the end of the exposure period, the concentrations of the indicator PCBs were 1.6 mg/g hump fat, 0.85 mg/g milk fat and 0.56 mg/L blood serum, i.e., ten times over the background level. |
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18 |
Development of a dual action planting and mulching machine for vegetable seedlings |
Khazimov Z.M., ]Bora G.C. Khazimov K.M., Khazimov M.Z., Ultanova I.B., Niyazbayev A.K.;
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2018 |
A mechanical mulching of soils during planting seedlings is becoming popular due to the shortage of labor. Evaluation of the dual action equipment for mulching soils along with planting of vegetable seedlings has been undertaken for qualitative performance of operations and productivity. The device was evaluated in production conditions for receiving its operational indicators. The deviation from a longitudinal axis line of planting seedlings was 5 cm and depth of planting seedling was 12 cm. The average field capacity of the combined machine in planting seedlings of vegetables was about 0.405 ha/hr. The average forward speed of machine was 2.03 km/h and thus average quantity of the planted seedlings was 271 seedlings/min. © 2018 Asian Agricultural and Biological Engineering Association |
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19 |
Processing of the bottomhole zones of oil wells with use of the carbon nanomaterials |
D.A.Baiseitov, M.I.Tulepov, S.Tursynbek, L. R. Sassykova, M. Nazhipkyzy, Sh.E. Gabdrashova, Y.V.Kazakov, I.O.Pustovalov, F.Y. Abdrakova, Z. A. Mansurov and A. B. Dalton;
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2017 |
Rasayan J. Chem |
The objective of the work was study of compositions on the basis of ammonium nitrate of grade B, magnesium,aluminium, an epoxy resin and the nanostructured soot as the gas-generating composition of gas generator for processing of oil wells. In the work the regularities and features of combustion of carbonaceous nanomaterials in two gas generating compositions with regard to the conditions of the oil wells were determined. Influence of various amount of the nanostructured soot on regularities of combustion of pyrotechnic gas generator composition was researched.The content of the combustion products by the "Terra" program for composition No.2 was determined. An optimal composition for the processing bottomhole zones of oil wells was offered. |
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20 |
Modern sediment
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B.Yedilbayev, A.Brener,
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2021
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Transport and
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The work deals with the mathematical modeling of traffic phenomena. The submitted model is based on a prospective analogy of some described phenomena with particle sedimentation. Both the qualitative analysis of the model and the numerical experiment is carried out. Qualitative results of the research have been compared with the known data of supervision of the traffic on city highways. As a result, the main control parameters which can use for optimal traffic management are highlighted and justified. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85114037174&origin=resultslist |
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21 |
The green space
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Minzhanova, G., Pavlichenko, L.,
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2021 |
Geojournal of tourism
|
The theory of urban ecology tries to enhance the positive aspects of green space for humans, while at the same time decreasing the negative aspects of cities for the environment. These benefits are reflected in economic terms as they have a positive effect on real estate values, investment, tourism and the quality of life. In this study urban green space is defined as all urban land covered by vegetation of any kind. This covers vegetation on private and public grounds, irrespective of size and function, and can also include small water bodies such as ponds, lakes or streams. This study aims to find the relationship between green space abundance and social impact in particular on academic progress in Almaty city, South Kazakhstan. Data on green space, academic average point score, and nine possible confounding variables were collated. Multiple linear regression analysis was performed. Multivariate data analysis was performed to produce scatter plots that include regression lines. |
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22 |
Purification of Oil-Containing
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М. Abdibattayeva, |
2021 |
Безопасность труда в промышленности.
|
Significant oil losses in oil-containing wastes and their adverse impact on the region environmental setting bring about the need to develop an oil-containing wastes treatment technology. To tackle this issue, the authors have set an aim of designing a helio device and creating an oil-containing wastes treatment method based on it to extract oil products. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85106661058&origin=resultslist |
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23 |
Tuning the Nanoporous
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Barzegar F.
|
2021 |
ACS Applied Energy Materials
|
Controlling the porosity of carbon-based electrodes is key toward performance improvement of charge storage devices, e.g., supercapacitors, which deliver high power via fast charge/discharge of ions at the electrical double layer (EDL). Here, eco-friendly preparation of carbons with adaptable nanopores from polymers obtained via microwave-assisted cross-linking of poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) is reported. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85100321540&origin=resultslist |
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24 |
Revisiting the carbon
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Pavlenko V., Kalybekkyzy S.,
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2021 |
Ionics
|
The important role of mesopores has been investigated in electric double-layer capacitors (EDLCs) operating from 24 °C down to − 40 °C by using two in-house synthesized carbons with hierarchical porosity. These carbons were prepared from colloidal nanoparticles of SiO2 as the template and d-glucose as the carbon source. A decrease in the average diameter of the nanoparticles from 12 to 8 nm results in increased surface area and offers a perfect match between ions of binary mixture of imidazolium-based fluorinated ionic liquids and the pores of carbon. |
https://www.scopus.com/record/display.uri?eid=2-s2.0-85118582487&origin=resultslist
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25 |
In Vivo Comparison of Chlorine-Based Antiseptics versus Alcohol
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Zh.Myltykbayeva, G.Kovaleva, A.Mukhitdinov, S.Omarova and R.Nadirov;
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2020 |
Hindawi Scientifica Volume |
Despite being commonly used as effective preparation for surgical hand antisepsis, alcohol solutions have major drawbacks, such as drying effect, emergence of hand eczema, and other diseases. (is study aimed to demonstrate the effectiveness of sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2) as antiseptic in comparison to single sodium hypochlorite and 70% ethanol. In 5-day tests, the effects of 3 antiseptics were established according to standard test methods. (e antiseptics were applied to the hands of 82 volunteers, and samples of bacteria were collected on days 1 and 5, immediately after drying and 6 hours later after antiseptic application. Student’s t test and ANOVA were applied in a statistical study. (e NaOCl with H2O2 composition demonstrated noninferiority to both sodium hypochlorite only and alcohol products and superiority to these antiseptics on day 5 (P < 0.05 at a significance level of 5% for each comparative trial in this day) at equivalence margin of 20%. (e effectiveness of the NaOCl plus H2O2 composition as an antiseptic was explained by the formation of singlet oxygen in the system. Together, these data suggest that NaOCl and H2O2 may be an effective hand antisepsis that avoids the drawbacks seen with alcohol solutions. |
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26 |
Quality of Drinking Water in the Balkhash District of
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S.Nurtazin, S.Pueppke, T.Ospan , A.Mukhitdinov and T. Elebessov;
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2020 |
Water |
The thinly populated Balkhash District of Kazakhstan’s Almaty Region lies in the lower reaches of the Ili-Balkhash basin, which is shared by China and Kazakhstan. The district is arid and heavily dependent on inflows of surface water, which are threatened by the e |
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27 |
Study of the thermophysical and physical - mechanical properties
|
Zhumadilov.A.Zh ,Kaldybayeva,.S; Nuruldaeva.G.Zh ; Kumar D.B
|
2019 |
Periódico Tchê Química |
Highly alloyed alloys, in which expensive chromium and nickel are alloying elements, are widely used as heat-resistant materials. Their total content in heat-resistant alloys reaches 30% or more. However, the life of working parts made of heat-resistant alloys is limited. Moreover, the higher the operating temperature, the shorter it is. This leads to increased costs for maintaining the units in working condition. Examples of such parts are the grate of agglomeration machines, details of boiler plants, roasting, heating, and glass melting furnaces, casting molds, exhaust manifolds of forced automobile engines, etc. In this regard, reducing the cost of heatresistant products, while maintaining their operating characteristics and life, becomes very actuality. One of the promising options to solve it is to manufacture these parts made of high-alloyed heat-resistant aluminum cast iron CHYU22SH (CHYU22SH - standard cast iron). Castings made of cast iron CHYU22SH differ, first of all, by being heat resistance at high temperatures in air (up to 1100 °C) and in media containing sulfur, sulfur dioxide, oxides of vanadium, and water vapor. In addition, they can functionally operate as a wear-resistant product having high strength at normal and elevated temperatures. The paper presents the thermal and mechanical properties of casting, as well as the results of microstructure analysis of aluminum cast irons. |
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28 |
Pvc and polietilentereftalat in the processes of combustion with
|
Tulepov M.I., Spanova G.A., Tleuberdi E., Pustovalov I.A., Tureshova G.O., Golovchenko O.Yu., Aknazarov S.Kh., Zhunussova K.Z., Abdrakova F.Yu., Baiseitov D.A; |
2019 |
Procedia Computer Science |
For particles of binders – gas chlorvinyl is characterized by the consolidation of particles into a solid polymer phase with a slight increase in temperature due to adhesion and the formation of larger aggregates – polymer coagulants, which is accompanied by physicochemical and thermal processes such as adsorption, adhesion, coagulation and the formation of new phases. Thus, the interfacial interaction between the surface of the coal and gaseous vinyl chloride results in the contact of condensed matter of different nature, and the adhesion of PVC in the presence of coal particles provides between the particles of the briquettes the connection of a certain strength through physical or chemical molecular forces.To produce durable briquettes were also used supplements polyethylene terephthalate improves the calorific value and energetic properties of the resulting briquettes. Experiments with different concentrations of polyethylene terephthalate showed that with increasing concentration of this binder, the calorific value of briquettes is increased linearly. |
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29 |
Melting point depression of ionic liquids by their confinement in carbons of controlled mesoporosity |
Béguin F. Pavlenko V., Przygocki P., Pawlyta M., Ratajczak P.;
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2020 |
The effect of ionic liquids (ILs) confinement in the nanoporosity of carbons on their low temperature transitions has been studied by differential scanning calorimetry. The ILs consisted of the [EMIm+] cation and [FSI−], [TFSI−] or [BF4−] anions. The carbons were strictly microporous (Maxsorb) and mesoporous with a small amount of micropores, i.e. a MgO templated carbon TC-1 (Lmeso = 3.4 nm), a silica templated carbon TC-2 (Lmeso = 8.7 nm), and a high surface area carbon black SC2A (Lmeso = 9.6 nm). All ILs encapsulated in the microporous Maxsorb demonstrated “flat” low temperature thermograms typical of an adsorbed state. In the narrow mesopores of TC-1, the interactions between the ions and the pore walls constrained the molecular motions, leading to a glass transition upon heating. The three confined ILs in SC2A displayed a melting peak at lower temperature (ΔTm ∼ -30 °C) than their neat counterpart. The ΔTm shift was comparable for TC-2 soaked with [EMIm+] [FSI−], whereas only a glass transition was given by [EMIm+] [TFSI−] and [EMIm+] [BF4−] confined in this carbon. Overall, the work shows that the liquid state of ILs can be extended to lower temperatures by their confinement in carbons possessing relatively wide mesopores. © 2020 Elsevier Ltd |
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30 |
Fitting the porous texture of carbon electrodes to a binary ionic liquid electrolyte for the realization of low temperature EDLCs |
Pameté Yambou E., Gorska B., Pavlenko V., Beguin F. |
2020 |
We report on electrical double-layer capacitors (EDLCs) operating effectively at low temperature (down to −40 °C) while implementing nanoporous carbon electrodes and an ionic liquid (IL) electrolyte. For this purpose, the binary mixture of [EMIm][FSI] and [EMIm][BF4] in 1:1 mol ratio has been selected, since it has been previously shown that it remains liquid down to its vitrification at −97 °C, unlike the parent ILs with melting points of −13 °C and 14 °C, respectively. To enhance the mass transport of the IL ions, especially at a low temperature, where the IL electrolyte exhibits a high viscosity, carbon electrode materials with a substantial share of mesopores serving as passageways for bulky ions were selected. These were a carbon black (SC2A) with a broad range of interparticle mesopores in addition to a reasonable amount of micropores, as well as a home-made templated carbon (MP98B) with hierarchical porous texture made of interconnected micropores and well-defined mesopores. From 20 to −40 °C, the capacitor with MP98B electrodes displayed greater specific capacitance, energy and power as well as better charge propagation than the cell with SC2A, whereas on volumetric basis its performance was inferior due to lower electrode density. Advanced SCMP composite electrodes of intermediate density were formulated by mixing these two carbons in the 1:1 mass ratio and harnessed to realize EDLCs with enhanced both specific and volumetric energy. Owing to the adjusted electrode properties, the performance of SCMP-based EDLCs surpassed literature data obtained with analogous constructions based on IL electrolytes and lightweight mesoporous materials, which suffered from poor volumetric metrics. |
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31 |
Towards an optimized hybrid electrochemical capacitor in iodide based aqueous redox-electrolyte: Shift of equilibrium potential by electrodes mass-balancing
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Abbas Q. Fitzek H., Pavlenko V. Gollas B.; |
2020 |
Considering the cost-effectiveness, safety, and environmental friendliness for energy storage and delivery at high rates, hybrid electrochemical capacitors in aqueous electrolytes containing redox-active species are attractive alternatives to expensive organic electrolyte based electric double-layer capacitors (EDLCs). Here, the influence of electrode mass-balancing on the equilibrium potential of hybrid cells in aqueous sodium nitrate + sodium iodide (5 mol L−1 NaNO3 + 0.5 mol L−1 NaI) has been investigated. The shift of equilibrium potential determines, whether the positive electrode behaves fully battery-like (charge/discharge strictly in the iodide redox potential range) or shows a mixed battery-like and EDL capacitive behavior. With an appropriate mass-balancing of the positive and negative electrodes (mass ratio = 1:2), the equilibrium potential shows a negligible shift during galvanostatic charge/discharge cycles at 0.5 A g−1, which results in full battery-like behavior of the positive electrode. Consequently, the hybrid cell exhibits stable electrochemical performance. By contrast, an equal or higher mass of the positive compared to the negative electrode, leads to a shift of the equilibrium potential resulting in two different charge storage mechanisms at the positive electrode. As a result, the overall performance of the hybrid cell deteriorates. We show by thermogravimetric analysis and Raman spectroscopy that the formation of polyiodides (I3 − and I5 −) is controlled by the oxidation of iodide (I−) anions to molecular iodine in nanoporous carbon based positive electrode, and that more polyiodides are produced, if the positive electrode operates strictly within the iodide/iodine redox potential range. |
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32 |
Pvc and polietilentereftalat in the processes of combustion with substandard coal |
Tulepov M.I., Spanova G.A., Tleuberdi E., Pustovalov I.A., Tureshova G.O., Golovchenko O.Yu., Aknazarov S.Kh., Zhunussova K.Z., Abdrakova F.Yu., Baiseitov D.A;
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2019 |
Procedia Computer Science |
For particles of binders – gas chlorvinyl is characterized by the consolidation of particles into a solid polymer phase with a slight increase in temperature due to adhesion and the formation of larger aggregates – polymer coagulants, which is accompanied by physicochemical and thermal processes such as adsorption, adhesion, coagulation and the formation of new phases. Thus, the interfacial interaction between the surface of the coal and gaseous vinyl chloride results in the contact of condensed matter of different nature, and the adhesion of PVC in the presence of coal particles provides between the particles of the briquettes the connection of a certain strength through physical or chemical molecular forces.To produce durable briquettes were also used supplements polyethylene terephthalate improves the calorific value and energetic properties of the resulting briquettes. Experiments with different concentrations of polyethylene terephthalate showed that with increasing concentration of this binder, the calorific value of briquettes is increased linearly. |
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33 |
CO2 Adsorption under Dynamic Conditions: An Overview on Rice Husk-Derived Sorbents and Other Materials |
V. Gargiulo, M. Alfè, F. Raganati, A. Zhumagaliyeva, Y. Doszhanov, P. Ammendola & R. Chirone |
2019 |
CO2 adsorption on solid sorbents under dynamic conditions is driven by a number of factors, among them textural features (pore volumes, pore size distribution, surface area…), surface chemistry (polarity, presence of active site and/or unsaturated coordinative sites…) and the overall active sites accessibility. Depending on the strength of the interaction with CO2 (chemisorption or physisorption), solid sorbents are broadly divided in two groups, although a sharp distinction between the two phenomena (in many cases concurrent) is obviously not possible. CO2 adsorption data acquired in a lab-scale fixed bed reactor under dynamic conditions and in typical conditions of post-combustion CO2 capture on materials produced from the work-up of carbonized rice husk were here reported and compared with pertinent literature on commercial and adhoc synthetized sorbents. Some attempts to correlate adsorption capacities and materials’ textural properties or other relevant adsorption parameters have been also proposed. |
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34 |
Development of gas-generator chemical cartridges working in the mode of non-explosive destructive mixture |
M. I. Tulepov, Sh. E. Gabdrashova, N. M. Rakhova, L. R. Sassykova, D.A. Baiseitov, Zh. Elemesova, M. A. Korchagin, S. Sendilvelan, I. O. Pustovalov and Z.A. Mansurov.
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2018 |
Rasayan J. Chem |
The work aim was the choice of technology that provides the possibility of destruction of various construction objects without the creation of shock, seismic waves, fragmentation, dust formation, concomitant detonation crushing with minimal emission of harmful substances. Preparation of the gas-chemical cartridges containing carbon nanomaterials was the result of researches. The composition of the non-explosive destructive mixture based on materials of Kazakhstan origin developing expansion force in a closed volume up to 30 MPa is developed. A composition of a fast-hardening mixture having a hardening rate of 8 MPa/h is created. The maximum level of strength of cement stone non-explosive breaking mixture for 30 min. hardening reaches 23 MPa. The hardening time of fast-hardening mixtures with a non-explosive breaking mixture was 15-20 min. In the case of using gas-chemical cartridges of the developed composition, the role of the carbon nanomaterial in it was determined by the low combustion rates of the composition and, very importantly, by slow ignition (the combustion of a single cartridge lasts up to 0.3 s under blasthole conditions). As a result of the carried out researches, it was found out that the range of scattering of splinters of concrete will depend on the amount of gas-generator composition, of its chemical composition and the burning rate. |
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35 |
Kinetics of polychlorinated biphenyls in bactrian camels |
Jurjanz, S., Nurseitova, M., Toregozhina, Z., Konuspayeva, G., Faye, B.
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2018 |
Emirates Journal of Food and Agriculture
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The study aimed to determine the accumulation and depuration of polychlorinated biphenyls (PCBs) in Bactrian camels. Four lactating, two-humped camels (Camelus bactrianus) received 0.8 mg PCBs (1.3 μg/kg body weight) daily for 56 days. Then, the depuration of the animals was monitored for the next 4 months. Milk, blood and hump fat of the camels were sampled every 2 weeks and analyzed. Body weight increased significantly, from approximately 550 to 613 kg, by the end of the study. The fat mass in the humps initially decreased (-2.3 kg, P < 0.05) then increased at the end of the depuration period (+2.0 kg, P < 0.05). At the end of the exposure period, the concentrations of the indicator PCBs were 1.6 mg/g hump fat, 0.85 mg/g milk fat and 0.56 mg/L blood serum, i.e., ten times over the background level. The concentrations in the hump fat decreased significantly during the depuration period, for congeners 28, 52, 101 and 118, but did not vary appreciably for the heavily chlorinated congeners 138, 153 and 180. The apparently stable concentrations of the heavier congeners may be an artifact of the reduced fat mass in the humps during the first part of the depuration period, combined with fat mobilization, which may mask the reduction of stored PCBs. PCB concentrations in the milk and blood were not significantly reduced during the depuration periods, as they represent the outflow of PCBs from the pool stored in the humps and have a weak affinity for lipophilic compounds, respectively. Therefore, it should be recommended to avoid the consumption of raw fat from camel hump in polluted areas because this organ would easily bioaccumulate organic pollutants during an exposure and store it over an extended period. PCB contaminants in milk would reflect the intensity of the outflow from the stored pool, and it would take a longer time in camels than in other ruminants to obtain safe food after the exposure of the animals to persistent organic pollutants. |
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36 |
Development of a dual action planting and mulching machine for vegetable seedlings |
Khazimov Z.M., Bora G.C. Khazimov K.M., Khazimov M.Z., Ultanova I.B., Niyazbayev A.K.;
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2018 |
A mechanical mulching of soils during planting seedlings is becoming popular due to the shortage of labor. Evaluation of the dual action equipment for mulching soils along with planting of vegetable seedlings has been undertaken for qualitative performance of operations and productivity. The device was evaluated in production conditions for receiving its operational indicators. The deviation from a longitudinal axis line of planting seedlings was 5 cm and depth of planting seedling was 12 cm. The average field capacity of the combined machine in planting seedlings of vegetables was about 0.405 ha/hr. The average forward speed of machine was 2.03 km/h and thus average quantity of the planted seedlings was 271 seedlings/min. © 2018 Asian Agricultural and Biological Engineering Association |
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37 |
Processing of the bottomhole zones of oil wells with use of the carbon nanomaterials |
D.A.Baiseitov, M.I.Tulepov, S.Tursynbek, L. R. Sassykova, M. Nazhipkyzy, Sh.E. Gabdrashova, Y.V.Kazakov, I.O.Pustovalov, F.Y. Abdrakova, Z. A. Mansurov and A. B. Dalton;
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2017 |
Rasayan J. Chem |
The objective of the work was study of compositions on the basis of ammonium nitrate of grade B, magnesium,aluminium, an epoxy resin and the nanostructured soot as the gas-generating composition of gas generator for processing of oil wells. In the work the regularities and features of combustion of carbonaceous nanomaterials in two gas generating compositions with regard to the conditions of the oil wells were determined. Influence of various amount of the nanostructured soot on regularities of combustion of pyrotechnic gas generator composition was researched.The content of the combustion products by the "Terra" program for composition No.2 was determined. An optimal composition for the processing bottomhole zones of oil wells was offered. |