Электронный каталог
Начинается с S
Жанр:Естественные науки (natural_sciences)
Результат поиска:
141-150 из 177
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 1. - С. 86-91. - Bibliogr.: p. 90 ISSN 2518-718Х.
УДК:
543.573
Предметная рубрика
- Methods related to weight change. Thermogravimetry
Аннотация
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
Ключевые слова
thermogravimetry, thermal analysis, kinetic parameters, copolymers, polyethylene glycol fumarate, acrylic acid, activation energy
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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 // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 1. - Р. 92-98. - Bibliogr.: p. 96-97 ISSN 2518-718Х.
УДК:
546.2
Предметная рубрика
- Nonmetals of groups III, IV, VI and elements of group zero
Аннотация
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
Ключевые слова
Ge-Bi-Te ternary system, nBi2–mGeBi2Te4 homologous series, GeBi3 Te4 , GeBi4 Te4, tetradymitelike structure, topological insulators
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 2. - Р. 12-22. - Bibliogr.: p. 20-21 ISSN 2518-718Х.
УДК:
547.94
Предметная рубрика
- Natural alkaloids
Аннотация
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
Ключевые слова
quinolysine alkaloids, lupinine, azides, triazoles, methanesulfonyl chloride, terminal alkynes, 1,3- dipolar cycloaddition reaction, X-ray structural analysis
Казахстаника
0/0 Свободно
периодические издания(Журналы)
JUAN DU
Juan Du, Solvents Triggered Coil-to-Globule-to-Coil Transition of Dual Nanocomposite Hydrogels with Inorganic Hybrid Crosslinking [Text] / Juan Du Shimei Xu // Bulletin of the Karaganda University. Chemistry series. - 2022. - № 3. - Р. 115-126. - Bibliogr.: p. 124-125 ISSN 2518-718Х.
УДК:
544
Предметная рубрика
- Physical chemistry
Аннотация
This paper presents the study on the reentrant solvation of dual nanocomposite hydrogel poly-N isopropylacrylamide/Laponite/SiO2 (PNIPAM/Laponite/SiO2) upon shrinkage/reswelling process.
Ключевые слова
inorganic hybrid crosslinking, dual nanocomposite hydrogel, coil-to-globule-to-coil transition, poly-N-isopropylacrylamide, polar solvent
Казахстаника
0/0 Свободно
периодические издания(Журналы)
BURKEYEV M. ZH.
Burkeyev, M. Zh. Synthesis and Investigation of the Properties of Polymer-immobilized Silver- and Gold Nanoparticles [Text] / M. Zh. Burkeyev, S. R. Shibayeva , T. O. Khamitova [et al.] // Bulletin of the Karaganda University. Chemistry series . - 2022. - № 3. - Р. 198-207. - Bibliogr.: р. 206 ISSN 2518-718Х.
УДК:
54.04
Предметная рубрика
- Chemical properties (and constants)
Аннотация
Metal–polymer composites based on copolymers of polypropylene glycol maleate phthalate with acrylic acid and metallic gold and silver were synthesized for the first time
Ключевые слова
nanocomposites, silver, gold, copolymer, polypropylene glycol maleate phthalate, acrylic acid, metal–polymer complex, antimicrobial activity
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 4. - Р. 25-34. - Bibliogr.: p. 33-34 ISSN 2518-718Х.
УДК:
544.32
Предметная рубрика
- Thermodynamic functions of chemical processes
Ключевые слова
hydrazides, isoniazid, salicylic acid hydrazide, coumarins, hydrazones, antimicrobial activity
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 4. - Р. 5-13. - Bibliogr.: p. 10-11 ISSN 2518-718Х.
УДК:
544.4
Предметная рубрика
- Chemical kinetics. Catalysis
Аннотация
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
Ключевые слова
cucurbit[6]uril, 1-hydroxyethylidene-1,1-diphosphonic acid, glycoluril, paraformaldehyde, oligomer
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
Аннотация
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
Ключевые слова
composition material , polymer-inorganic compositions , electron irradiation, bentonite, synthetic polymers, natural polymers
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 4. - Р. 118-135. - Bibliogr.: p. 130-134 ISSN 2518-718Х.
УДК:
546
Предметная рубрика
- Inorganic chemistry
Аннотация
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
Ключевые слова
ferrites, sol-gel method with combustion, complexing agents, microwave technology, microwave power, dispersion, texture, specific surface area, particle size
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.] // Bulletin of the Karaganda University. Chemistry Series. - 2022. - № 4. - Р. 142-151. - Bibliogr.: p. 149-150 ISSN 2518-718Х.
УДК:
542.9
Предметная рубрика
- Chemical reactions. Selected chemical methods
Аннотация
In this work, ternary composites of NiZn ferrite/carbonyl iron/carbon black (Ni0.5Zn0.5Fe2O4/CI/CB) were prepared via two stages
Ключевые слова
NiZn ferrite, сarbonyl iron, сarbon black, reflection loss, absorption bandwidth, matching frequency, paraffin wax matrix, surface density
Казахстаника
0/0 Свободно
SARSENBEKOVA A. ZH.
STUDY OF THERMAL STABILITY AND DETERMINATION OF EFFECTIVE ACTIVATION ENERGY VALUES DURING DEGRADATION OF UNSATURATED POLYESTER COPOLYMERS IN THE AIR ATMOSPHERE
периодические издания(Журналы)
0/0 Свободно
ALIYEV F. R.
SYNTHESIS AND STUDY OF A NEW MIXED-LAYERED COMPOUND GEBI3 TE4 BELONGING TO THE NBI2–MGEBI2 TE4 HOMOLOGOUS SERIES
периодические издания(Журналы)
0/0 Свободно
NURMAGANBETOV ZH. S.
SYNTHESIS AND STRUCTURE OF 4-SUBSTITUTED (1S,9AR)-1-[(1,2,3-TRIAZOL-1-YL)METHYL]OCTAHYDRO-1H-QUINOLYSINES OF LUPININE
периодические издания(Журналы)
0/0 Свободно
JUAN DU
SOLVENTS TRIGGERED COIL-TO-GLOBULE-TO-COIL TRANSITION OF DUAL NANOCOMPOSITE HYDROGELS WITH INORGANIC HYBRID CROSSLINKING
периодические издания(Журналы)
0/0 Свободно
BURKEYEV M. ZH.
SYNTHESIS AND INVESTIGATION OF THE PROPERTIES OF POLYMER-IMMOBILIZED SILVER- AND GOLD NANOPARTICLES
периодические издания(Журналы)
0/0 Свободно
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
периодические издания(Журналы)
0/0 Свободно
PANSHINA S. YU.
SYNTHESIS OF CUCURBIT [6] URIL USING 1-HYDROXYETHYLIDENE-1,1-DIPHOSPHONIC ACID AS A “GREEN CATALYST”
периодические издания(Журналы)
0/0 Свободно
MAMYTBEKOV G. K.
SYNTHESIS, STRUCTURE AND PROPERTIES OF HYBRID COMPOSITE BENTONITE-BASED MATERIALS
периодические издания(Журналы)
0/0 Свободно
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
периодические издания(Журналы)
0/0 Свободно
HOUBI A.
SYNTHESIS AND MICROWAVE ABSORPTION PROPERTIES OF (NI0.5ZN0.5FE2O4/CI/CB) TERNARY COMPOSITES
периодические издания(Журналы)
0/0 Свободно