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961-970 of 1171
periodical press (Magazines)
MAMYTBEKOV G. K.
Mamytbekov, G. K. Synthesis, Structure and Properties of Hybrid Composite Bentonite-Based Materials [Text] / G. K. Mamytbekov, Zh. I. Beksultanov , V. I. Bannykh [et al.] // Bulletin of the Karaganda University. Chemistry series . - 2022. - № 3. - С. 267-282. - Bibliogr.: р. 277-279 ISSN 2518-718Х.
Annotation
A systematic study of the synthesis of hybrid composite materials based on synthetic (poly-Nvinylpyrrolidone) and natural (agar-agar) macromolecules in the presence of plasticizers (PEG-400, glycerin) and mineral filler bentonite has been performed by the method of electron irradiation
Keywords
composition material , polymer-inorganic compositions , electron irradiation, bentonite, synthetic polymers, natural polymers
Kazakhstan
0/0 Free
periodical press (Magazines)
ANDEKINA R. E.
Andekina, R. E. Small and medium-sized entrepreneurship of Kazakhstan in times of crisis: current condition, problems, recommendations [Text] / R. E. Andekina, R. U. Rakhmetova // Л.Н. Гумилев атындағы Еуразия ұлттық университетінің хабаршысы. Экономикалық сериясы. - 2022. - № 4. - Р. 53-64. - Bibliogr.: p. 62 ISSN 2789-4320.
UDC:
334.722
Subject headings
- Private enterprises
Annotation
The article examines the current state of entrepreneurship, its main indicators and external factors, and presents recommendations for the further development of entrepreneurship in various sectors of the economy of Kazakhstan
Keywords
small enterprise, medium-sized enterprise, entrepreneurship, individual entrepreneurs, business
Kazakhstan
0/0 Free
periodical press (Magazines)
MUSTAFAYEV ZH. S.
Mustafayev, Zh. S. Spatial-time change in the climatic parameters of the drainage of the river basin Ili [Text] / Zh. S. Mustafayev, L. M. Ryskulbekova // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2022. - № 1. - P. 102-109. - Bibliogr.: p. 108-109 ISSN 2224-5227.
UDC:
551.583
Subject headings
- Climate change
Annotation
In order to analyze climate change on a spatio-temporal scale, proceeding in various physical and geographical (geomorphological) conditions of the catchment area of the Ili River basin, we used the average annual air temperatures and annual precipitation for the period 1948-2020 of the meteorological stations Narynkol, Inin, Zharkent, Aidarly, Bakanas and Kuygan
Keywords
climate, catchment of river basins, annual precipitation, linear trend, климаттың өзгеруі, жылдық жауын-шашын, изменение климата, годовые атмосферные осадки
Kazakhstan
0/0 Free
periodical press (Magazines)
ZHUMAGELDINA A.
Zhumageldina, A. Shifted nonlocal nonlinear schrodinger and maxwell-bloch equation: darboux transformation and solution [Text] / A. Zhumageldina, K. Yesmakhanova // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2022. - № 2. - P. 108-121. - Bibliogr.: p. 120-121 ISSN 2224-5227.
UDC:
530.182
Subject headings
- Nonlinear phenomena
Annotation
In this work, motivated by the ideas of Musslimani and Ablowitz, shifted nonlocal nonlinear Schrodinger and Maxwell-Bloch equations (NLS-MB) were defined
Keywords
shifted nonlocality, nonlinear Schrodinger and Maxwell-Bloch equation, Darboux transformation, solution, Дарбу түрлендіруі, Шредингер мен Максвелл-Блохтың сызықты емес теңдеуі, преобразование Дарбу, уравнения Шредингера и Максвелла-Блоха
Kazakhstan
0/0 Free
periodical press (Magazines)
TURGUNALIEVA D. M.
Turgunalieva, D. M. Synthesis and antibacterial activity of hydrazones of isonicotinic and salicylic acids based on acetyl derivatives of coumarin and benzo [g] [1,3,5] oxadiazocine [Text] / D. M. Turgunalieva, D. S. Dilbaryan , A. S. Vasilchenkо [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 25-34. - Bibliogr.: p. 33-34 ISSN 2518-718Х.
UDC:
544.32
Subject headings
- Thermodynamic functions of chemical processes
Keywords
hydrazides, isoniazid, salicylic acid hydrazide, coumarins, hydrazones, antimicrobial activity
Kazakhstan
0/0 Free
periodical press (Magazines)
PANSHINA S. YU.
Panshina, S. Yu. Synthesis of cucurbit [6] uril using 1-hydroxyethylidene-1,1-diphosphonic acid as a “Green Catalyst” [Text] / S. Yu. Panshina, A. A. Bakibaev , A. N. Guslyakov [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 5-13. - Bibliogr.: p. 10-11 ISSN 2518-718Х.
UDC:
544.4
Subject headings
- Chemical kinetics. Catalysis
Annotation
In this work, 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) was used for the first time as a catalyst for “Green chemistry” in the synthesis of cucurbit[6]uril in an aqueous medium
Keywords
cucurbit[6]uril, 1-hydroxyethylidene-1,1-diphosphonic acid, glycoluril, paraformaldehyde, oligomer
Kazakhstan
0/0 Free
periodical press (Magazines)
SHELKOVNIKOV V. V.
Shelkovnikov, V. V. Study of the Methionine Electrooxidation at an Electrode Modified with Vitamin B12 and Multi-Walled Carbon Nanotubes [Text] / V. V. Shelkovnikov, A. M. Altyev , M. S. Fryanova // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 99-106. - Bibliogr.: p. 104-105 ISSN 2518-718Х.
UDC:
543.55
Subject headings
- Electroanalytical methods of analysis. Electrochemical methods of analysis
Annotation
The electrochemical behavior of methionine at an electrode modified with vitamin B12 and multi-walled carbon nanotubes has been studied in this work
Keywords
methionine, modified electrode, vitamin B12, electrooxidation, cobalamin, electron, proton, multi-walled carbon nanotubes
Kazakhstan
0/0 Free
periodical press (Magazines)
MULDAKHMETOV Z. M.
Muldakhmetov, Z. M. Synthesis of a Composite Based on Humic Acid Tuned to Sorbed Copper Ion [Text] / Z. M. Muldakhmetov, A. M. Gazaliev , A. Kh. Zhakina [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 182-187. - Bibliogr.: p. 186-187 ISSN 2518-718Х.
UDC:
547
Subject headings
- Organic chemistry
Annotation
In this study, a modified cross-linked composite based on humic acids, pre-tuned to sorbed copper ion, was obtained
Keywords
natural polymer, multi-walled carbon nanotubes, composite, template, tuning, sorption, functionalization, ultrasound
Kazakhstan
0/0 Free
periodical press (Magazines)
HOUBI A.
Houbi, A. Synthesis and Microwave Absorption Properties of (Ni0.5Zn0.5Fe2O4/CI/CB) Ternary Composites [Text] / A. Houbi, A. A. Zharmenov; Y. Atassi [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 142-151. - Bibliogr.: p. 149-150 ISSN 2518-718Х.
UDC:
542.9
Subject headings
- Chemical reactions. Selected chemical methods
Annotation
In this work, ternary composites of NiZn ferrite/carbonyl iron/carbon black (Ni0.5Zn0.5Fe2O4/CI/CB) were prepared via two stages
Keywords
NiZn ferrite, сarbonyl iron, сarbon black, reflection loss, absorption bandwidth, matching frequency, paraffin wax matrix, surface density
Kazakhstan
0/0 Free
periodical press (Magazines)
ZULFUGAROVA S. M.
Zulfugarova, S. M. Synthesis of Transition Metal Ferrites (Co, Cu, Ni, Mn) by the Sol-Gel Method with Combustion and the Use of Microwave Processing [Text] / S. M. Zulfugarova, G. R. Azimova , Z. F. Aleskerova [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 4. - Р. 118-135. - Bibliogr.: p. 130-134 ISSN 2518-718Х.
UDC:
546
Subject headings
- Inorganic chemistry
Annotation
This review considers recent work on the synthesis of transition metal ferrites (Co, Cu, Ni, Mn) by sol-gel method with combustion, as well as the effect of microwave radiation
Keywords
ferrites, sol-gel method with combustion, complexing agents, microwave technology, microwave power, dispersion, texture, specific surface area, particle size
Kazakhstan
0/0 Free
MAMYTBEKOV G. K.
SYNTHESIS, STRUCTURE AND PROPERTIES OF HYBRID COMPOSITE BENTONITE-BASED MATERIALS
periodical press (Magazines)
0/0 Free
ANDEKINA R. E.
SMALL AND MEDIUM-SIZED ENTREPRENEURSHIP OF KAZAKHSTAN IN TIMES OF CRISIS: CURRENT CONDITION, PROBLEMS, RECOMMENDATIONS
periodical press (Magazines)
0/0 Free
MUSTAFAYEV ZH. S.
SPATIAL-TIME CHANGE IN THE CLIMATIC PARAMETERS OF THE DRAINAGE OF THE RIVER BASIN ILI
periodical press (Magazines)
0/0 Free
ZHUMAGELDINA A.
SHIFTED NONLOCAL NONLINEAR SCHRODINGER AND MAXWELL-BLOCH EQUATION: DARBOUX TRANSFORMATION AND SOLUTION
periodical press (Magazines)
0/0 Free
TURGUNALIEVA D. M.
SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF HYDRAZONES OF ISONICOTINIC AND SALICYLIC ACIDS BASED ON ACETYL DERIVATIVES OF COUMARIN AND BENZO [G] [1,3,5] OXADIAZOCINE
periodical press (Magazines)
0/0 Free
PANSHINA S. YU.
SYNTHESIS OF CUCURBIT [6] URIL USING 1-HYDROXYETHYLIDENE-1,1-DIPHOSPHONIC ACID AS A “GREEN CATALYST”
periodical press (Magazines)
0/0 Free
SHELKOVNIKOV V. V.
STUDY OF THE METHIONINE ELECTROOXIDATION AT AN ELECTRODE MODIFIED WITH VITAMIN B12 AND MULTI-WALLED CARBON NANOTUBES
periodical press (Magazines)
0/0 Free
MULDAKHMETOV Z. M.
SYNTHESIS OF A COMPOSITE BASED ON HUMIC ACID TUNED TO SORBED COPPER ION
periodical press (Magazines)
0/0 Free
HOUBI A.
SYNTHESIS AND MICROWAVE ABSORPTION PROPERTIES OF (NI0.5ZN0.5FE2O4/CI/CB) TERNARY COMPOSITES
periodical press (Magazines)
0/0 Free
ZULFUGAROVA S. M.
SYNTHESIS OF TRANSITION METAL FERRITES (CO, CU, NI, MN) BY THE SOL-GEL METHOD WITH COMBUSTION AND THE USE OF MICROWAVE PROCESSING
periodical press (Magazines)
0/0 Free