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Genre:Естественные науки (natural_sciences)
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171-180 of 219
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
periodical press (Magazines)
SEKSENOVA D. U.
Seksenova, D. U. Sarcocystis in some rodents and birds [Text] / D. U. Seksenova, B. K. Esimov , Z. A. Ibragimova // Қазақстан Республикасы Ұлттық ғылым академиясының хабарлары. Биология және медицина сериясы. - 2020. - № 2 (338). - P. 56-61. - Bibliogr.: p. 61 ISSN 2224-5308.
UDC:
591.2
Subject headings
- Diseases of (undomesticated) animals. Animal pathology
Annotation
The proposed work is devoted to study the fauna and cycles of the development of micromorphology of representatives of the genus Sarcocystis of some rodents and birds
Keywords
sarcocyst, sarcosporidiosis, micromorphology, definitive host, schizogony, gametogony, sporogony, merozoite, саркоциста, саркоспоридиоз
Kazakhstan
0/0 Free
periodical press (Magazines)
SARSENBEKOVA A. ZH.
Sarsenbekova, A. Zh. Study of thermal stability and determination of effective activation energy values during degradation of unsaturated polyester copolymers in the air atmosphere [Text] / A. Zh. Sarsenbekova, A. N. Bolatbay , V. V. Morgun [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 1. - С. 86-91. - Bibliogr.: p. 90 ISSN 2518-718Х.
UDC:
543.573
Subject headings
- Methods related to weight change. Thermogravimetry
Annotation
The article presents the results of a study of the kinetic parameters of copolymers based on polyethylene glycol fumarates, as well as external and internal effects on them
Keywords
thermogravimetry, thermal analysis, kinetic parameters, copolymers, polyethylene glycol fumarate, acrylic acid, activation energy
Kazakhstan
0/0 Free
periodical press (Magazines)
GAVRILOVA N. N.
Gavrilova, N. N. Selection of a nutrient medium for growing bacteria which are part of an environmentally friendly veterinary probiotic preparation [Text] / N. N. Gavrilova, Zh. E. Sagidoldina , A. K. Sadanov [et al.] // Қазақстан Республикасы Ұлттық ғылым академиясының хабарлары. Биология және медицина сериясы. - 2020. - № 3 (339). - P. 29-34. - Bibliogr.: p. 34 ISSN 2224-5308.
UDC:
579
Subject headings
- Микробиология
Annotation
The aim of the study was to select the optimal nutrient medium for growing bacteria that are part of the probiotic
Keywords
probiotic bacteria, growth media , antimicrobial activity, viable cells'titer, пробиотикалық бактериялар, ветеринарлық препарат, пробиотические бактерии, ветеринарный препарат
Kazakhstan
0/0 Free
periodical press (Magazines)
ALIYEV F. R.
Aliyev, F. R. Synthesis and study of a new mixed-layered compound GeBi3 Te4 belonging to the nBi2–mGeBi2 Te4 homologous series [Text] / F. R. Aliyev, E. N. Orujlu , D. M. Babanly // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 1. - Р. 92-98. - Bibliogr.: p. 96-97 ISSN 2518-718Х.
UDC:
546.2
Subject headings
- Nonmetals of groups III, IV, VI and elements of group zero
Annotation
In light of the structural properties of tetradymite-like layered chalcogenide compounds, the mixed-layered compound GeBi3Te4 was predicted and synthesized for the first time, which belongs to the nBi2–mGeBi2Te4 homologous series in the Ge-Te-Bi system
Keywords
Ge-Bi-Te ternary system, nBi2–mGeBi2Te4 homologous series, GeBi3 Te4 , GeBi4 Te4, tetradymitelike structure, topological insulators
Kazakhstan
0/0 Free
periodical press (Magazines)
NURMAGANBETOV ZH. S.
Nurmaganbetov, Zh. S. Synthesis and Structure of 4-Substituted (1S,9aR)-1-[(1,2,3-triazol-1-yl)methyl]octahydro-1H-quinolysines of Lupinine [Text] / Zh. S. Nurmaganbetov, S. D. Fazylov , K. M. Turdybekov [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 2. - Р. 12-22. - Bibliogr.: p. 20-21 ISSN 2518-718Х.
UDC:
547.94
Subject headings
- Natural alkaloids
Annotation
The article presents results on the synthesis and investigation of the structural features of a number of 1,4-disubstituted 1H-1,2,3-triazole derivatives of the alkaloid lupinine
Keywords
quinolysine alkaloids, lupinine, azides, triazoles, methanesulfonyl chloride, terminal alkynes, 1,3- dipolar cycloaddition reaction, X-ray structural analysis
Kazakhstan
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
periodical press (Magazines)
0/0 Free
SARSENBEKOVA A. ZH.
STUDY OF THERMAL STABILITY AND DETERMINATION OF EFFECTIVE ACTIVATION ENERGY VALUES DURING DEGRADATION OF UNSATURATED POLYESTER COPOLYMERS IN THE AIR ATMOSPHERE
periodical press (Magazines)
0/0 Free
GAVRILOVA N. N.
SELECTION OF A NUTRIENT MEDIUM FOR GROWING BACTERIA WHICH ARE PART OF AN ENVIRONMENTALLY FRIENDLY VETERINARY PROBIOTIC PREPARATION
periodical press (Magazines)
0/0 Free
ALIYEV F. R.
SYNTHESIS AND STUDY OF A NEW MIXED-LAYERED COMPOUND GEBI3 TE4 BELONGING TO THE NBI2–MGEBI2 TE4 HOMOLOGOUS SERIES
periodical press (Magazines)
0/0 Free
NURMAGANBETOV ZH. S.
SYNTHESIS AND STRUCTURE OF 4-SUBSTITUTED (1S,9AR)-1-[(1,2,3-TRIAZOL-1-YL)METHYL]OCTAHYDRO-1H-QUINOLYSINES OF LUPININE
periodical press (Magazines)
0/0 Free