Химические науки список научных статей
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SYNTHESIS AND PREDICTION OF THE SPECTRUM OF BIOLOGICAL ACTIVITY 3-(8-BENZODIOXOCIN 1,6 IL) COUMARIN
The article discusses the modified synthesis of new chemical compounds of 3-heteroaryl-coumarins with 1,6 ben-zodioxocine fragments with a more convenient and effective method under the conditions of the Knoevenagel reac-tion. Some physicochemical constants have been studied. РMR spectra of...
2024 / Ismailova Gulzira, Jurayeva Aziza, Tulyasheva Muborak -
PRODUCTION OF ANIONITE BY MODIFICATION OF POLYVINYL CHLORIDE IN THE PRESENCE OF UREA
In this work, the conditions for the synthesis of anion exchanger by modifying PVC with urea were studied. As a result of studying the influence of various external factors on the modification of polyvinyl chloride with urea during the modification process, the optimal conditions for modifying...
2024 / Babojonova Gulbakhor -
QUANTUM-CHEMICAL ANALYSIS OF SOME PHYSICO-CHEMICAL PROPERTIES OF SUCCINIC ACID, MONOETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE AND THEIR COMPLEX COMPOUNDS
In this article, a quantum-chemical analysis of some physico-chemical properties of succinic acid, monoethanolamine, diethanolamine, triethanolamine and complex compounds that can be obtained based on them was carried out. Based on the results of quantum chemical analysis, the donor atoms in the...
2024 / Matyakubova Mavlyuda, Hasanov Shodlik, Abdullaeva Zubayda, Khudoyberganov Oybek -
RESEARCH OF SOME 3D COMPLEX COMPOUNDS OF METALS BASED ON 3-ACETYLAMINOTRIAZOLE
Complex compounds of 3-acetylaminotriazole with chlorides of Mn (II), Ni(II) and Co(II) were synthesized and their composition and structure were studied using modern physic-chemical methods, such as element (SEM), thermal and IR spectroscopic analysis. It was found that the ligand...
2024 / Chalaboyeva Zilola, Razzoqova Surayyo, Torambetov Batirbay, Kadirova Shakhnoza -
REACTION OF 6-AMINOQUINAZOLIN-4-ONE WITH AROMATIC ALDEHYDES
In this research work, the reactions of the bicyclic compound 6-aminoquinazolin-4-one with aromatic aldehydes containing the functional groups –NO2, –OH, –N(CH3)2, –OCH3 were studied. Factors influencing the reaction process and product yield are identified, and optimal conditions are presented....
2024 / Ziyadullaev Mirjalol, Adilboev Samariddin, Sobirova Fotima, Khaitova Shakhnoza -
SYNERGIC EFFECT OF FIRE RETARDANTS AND THEIR ANALOGUES FOR TEXTILE MATERIALS
This work compares the thermal stability of natural textile materials, flame retardants and natural textile materials modified with flame retardants, and also studies the mechanisms of thermal stability and synergistic effect
2024 / N. Muzaffarova, F. Nurkulov, N. Toshtemirova -
DEVELOPMENT OF TECHNOLOGY FOR PROCESSING WASTE ENRICHMENT OF PHOSPHORITES OF THE CENTRAL KYZYL KUM FOR PHOSPHORUS AND NITROGEN-CALCIUM FERTILIZERS
The world's population has exceeded 8 billion people and the problem of food supply has become even more acute due to the reduction of arable land, fresh water reserves and soil salinization. Mineral fertilizers are the main factor ensuring the growth of agriculture. The chemical industry of the...
2024 / B. Haydarov, A. Shukurov, N. Yusufova -
MAGNETRON SPUTTERING SYNTHESIS OF ELECTROCATALYSTS
Magnetron sputtering is a well-known method of obtaining various coatings and surface modifications, but nowadays it is successfully used for the synthesis of electrocatalysts. One of the main advantages of the method is the possibility to vary the parameters during the process, such as the mode...
2024 / M.V. Kozlova, V.N. Fateev, O.K. Alekseeva, N.A. Ivanova, V.V. Tishkin, A.Sh. AliyevScopusCAS -
NEW p-AMINODIPHENYLAMINE AMIDE COMPOUNDS: DESIGN, SYNTHESIS AND ANTI β-lACTAMASES ACTIVITY EVALUATION
β-Lactams, such as penicillins and cephalosporins, have long been recognized as the most effective antibiotics for the treatment of infectious diseases. However, the major limitation to their effectiveness is the bacterial production of β-lactamase enzymes, which hydrolyze the β-lactam ring in...
2024 / Ahmed A. Saleh, Ahmed A. J. MahmoodScopusCAS -
TREATMENT OF LEACHATE BY THE CARBON MATERIAL OBTAINED FROM POLYMER FRACTION OF MUNICIPAL SOLID WASTE
In the study, the process of anaerobic thermal processing of polymer fraction of municipal solid waste using a horizontal and vertical type of reactor has been developed in order to obtain a new carbon sorbent. The productivity of carbon material by the horizontal method is 20%, while vertical type ...
2024 / Natela Dzebisashvili, Grigor Tatishvili, Darejan DughashviliScopusCAS -
IR SPECTRA OF DIMOLYBDENUM TETRA-μ2-PHENYLACETATE COMPLEX AND ITS DERIVATIVES
The study describes the synthesis, thermal and spectral characteristics of tetra-μ2-phenylacetate complex of dimolybdenum – Мо2(O2CCH2C6H5)4 and its derivatives in the type [Мо2(O2CCH2C6H5)4]L2' [where L' = α-, β-picoline (α-, β-Pic), 4-vinylpyridine (4-VinPy), quinoline (Q). The comparison of IR...
2024 / E.L. Akhmedov, S.Sh. Akberova, K.F. Huseynguliyeva, Sh.Y. IsmayilovaScopusCAS -
COOMASSIE BRILLIANT BLUE STAINING USED IN SPECTROPHOTOMETRIC ASSAY FOR DOPAMINE HYDROCHLORIDE AND METHYLDOPA DETERMINATION
The catalytic oxidation reaction between Coomassie Brilliant Blue and N-bromosuccinimide was used in an acidic medium to develop a spectrophotometric method for the estimation of dopamine and methyldopa in their pure forms and in pharmaceutical preparations. The developed method exhibited high...
2024 / Esraa A. Ahmad, Mohamed Y. DhamraScopusCAS -
NATURE OF EUTECTIC CRYSTALLIZATION IN THE Fe0,67Sb0,33 – Pb SYSTEM AND THE POSSIBILITIES OF APPLICATION OF THE DETECTED HOMOGENEOUS PHASES IN SOLID-STATE ELECTRONICS
From the phase diagram it is clear that the Fe0,67Sb0,33 – Pb system is quasi-binary and has a eutectic type of phase formation. The solid solution region with a boundary of 4 mol% Pb at 300K was discovered in the system. Based on the temperature dependence of the contact resistance of the...
2024 / Ch.I. Abilov, M.Sh. Hasanova, E.K. Gasumova, N.T. Huseynova, S.M. JavadovaScopusCAS -
METAL HYDRIDES AND METAL-ORGANIC FRAMEWORKS FOR HYDROGEN STORAGE IN AUTOMOTIVE APPLICATIONS: A REVIEW
Hydrogen is an attractive automotive fuel because it is carbon-free, abundantly available from water, and has an exceptional mass-energy density. Hydrogen storage has become a trendy topic in recent years with its ability to design low-cost, lightweight materials that can reversibly and rapidly...
2024 / Moneer Alenezi, Bader Alarbeed, Yousef AlqaheemScopusCAS -
INVESTIGATION OF MASS GRADIENT OF CONCRETE FILLED WITH POLYACRYLAMIDE/Fe3O4 MAGNETITE NANOPARTICLES İN CASPIAN SEA AND FORMATION WATER MEDIUM
In the study, changes in the mass of concrete filled with polyacrylamide/Fe3O4 nanoparticles in an amount of 1–2% of the cement mass in sea and formation water were studied. Besides, by performing IR and X-ray characterization of the prepared samples, the chemical state of the polyacrylamide (PAA)...
2024 / S.F. Humbatova, Sh.Z. Tapdyqov, J.E. Guliyeva, A.M. Gulamirov, E.Y. Malikov, S.M. Mammadova, A.A. Fariz, S.Sh. KazimovaScopusCAS -
SYNTHESIS AND CHARACTERIZATION OF NEW Mn(II), Co(II), Ni(II), Cu(II), Zn(II) And Cd(II) COMPLEXES WITH [(z)-3((6-AMINOPYRIDINE-2-yl) IMINO) INDOLIN-2-ONE] LIGAND
A Schiff base ligand, 3-((6-amino-1,6-dihydropyridin-2-yl)imino)indolin-2-one, was synthesized by condensing isatin with 2,6-diaminopyridine in this study. Elemental analysis, NMR spectroscopy, and infrared spectroscopy enabled confirmation of the structure of the pyridine-incorporated ligand....
2024 / Farah T. Saeed, Zeena U. JasimScopusCAS -
EFFECTS OF ADDITION OF CHITOSAN AND DICARBOXYLIC ACID ON PROPERTIES OF 3D PRINTABLE ACRYLIC RESIN DENTURE BASE
3D-printing has gained popularity in recent years due to the many advantages it offers over the traditional approaches for instance this technology reduces the time a dentist needs to create and fit dentures to just 2–3 sessions. Fumaric, maleic, and adipic acids with the percentage (0.1 wt.%) were ...
2024 / Ihssan F. Al-Takai, Luma Al-Nema, Fawzi H. JabrailScopusCAS -
ФИЗИКА ФАНИНИ ЎҚИТИШ ЖАРАЁНИДА МУҲАНДИСЛИК ЙЎНАЛИШИ ТАЛАБАЛАРИНИ КОМПЕТЕНТЛИ ЁНДАШУВ АСОСИДА КАСБИЙ ФАОЛИЯТГА ТАЙЁРЛАШ
Мақолада физикани ўқитиш жараёнида муҳандислик йуналиши талабаларининг касбий компетентлигини шакллантиришда компетентли ёндашувдан фойдаланиш усуллари ёритилган.
2024 / Бекнозарова Замира Фармановна -
ОБЩИЕ ПОНЯТИЯ О ГЕТЕРОЦИКЛИЧЕСКИХ СОЕДИНЕНИЯХ
Приведены сведения о происхождении, химических и физических свойствах, получении и использовании 5и 6-членных конденсированных гетероциклических соединений.
2023 / Азимов Н.Ш., Имомалиева Д.Ш. -
МУЖАССАМЛАНГАН ҚУЁШ НУРЛАРИ ОҚИМИ ВОСИТАСИДА ЮҚОРИ ҲАРОРАТЛИ ОКСИД МАТЕРИАЛЛАРНИ СИНТЕЗ ҚИЛИШНИНГ ТЕХНОЛОГИК ЖИҲАТЛАРИ
Мақолада қуёш энергияасидан фойдаланишнинг юқори самарали усулларидан бири қуёш радиациясиини ёрдамида матриалларни юқори ҳароратда қиздириш усуллари ёритилган.
2024 / Сувонова Лола Суюновна