Химические науки список научных статей
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КАТАЛИТИЧЕСКИЙ МЕХАНИЗМ ВОЗДЕЙСТВИЯ ТРИПТОФАН-ИНДОЛ-ЛИАЗЫ НА НЕСТАНДАРТНЫЕ СУБСТРАТЫ. РОЛЬ ИОННОГО СОСТОЯНИЯ КАТАЛИТИЧЕСКОЙ ГРУППЫ, АКЦЕПТИРУЮЩЕЙ Cα-ПРОТОН СУБСТРАТА
В реакции триптофан-индол-лиазы (ТИЛ) с субстратом, содержащим плохую уходящую группу (L-серин), необходим общекислотный катализ на стадии ее отщепления. В ходе этой стадии происходит формальный перенос протона из α-положения субстрата к уходящей группе, при этом отщепляется вода. В результате...
2019 / Фалеев Н.Г., Цветикова М.А., Гоголева О.И., Ревтович С.В., Куликова В.В., Кочетков К.А.WOSScopusВАКRSCIPubMed -
The uptake of Pb(II) metal ion in water using polyhydroquinone/graphene nanocomposite material: kinetics, thermodynamics and mechanism studies
A novel nanocomposite of polyhydroquinone/graphene was synthesized and analyzed by XRD, Raman spectroscopy, TG, SEM and TEM. It was used to remove lead metal ion in aqueous solution. The maximum removal capacity was 156.5 µg/g at 60 min time, 6.0 pH, 3.0 g/L dose and 25 °C. The removal of lead...
2019 / Ali I., Burakov A.E., Melezhik A.V., Babkin A.V., Burakova I.V., Neskoromnaya E.A., Galunin E.V., Tkachev A.G.ВАКCAS -
The formation mechanism of microduplex type structure during thermomechanical treatment of superalloy
The influence regularities of the deformation processing conditions as well as the size of the strengthening g¢-phase on the formation of a fine-grained microduplex type structure in superalloy are studied. It is shown that during hot deformation of alloys with an isomorphic g¢-phase, depending on...
2019 / Valitov V.A.ВАКCAS -
Scandium adsorption from Sulfuric-Chloride solutions by PANI/CNTs nanocomposite
The article studies the adsorption of the rare-earth element of scandium on a nanocomposite synthesized by carbon nanotubes modified with polyaniline. Using the methods of scanning electron microscopy, Raman spectroscopy and thermogravimetry, the physicochemical properties of the sorbent were...
2019 / Wai Moe Aung, Marchenko M.V., Troshkina I.D., Burakova I.V., Gutnik I.V., Burakov A.E., Tkachev A.G.ВАКCAS -
Methods of physicochemical analysis and multifractal parametrization in the process of diamond nanostructured composites formation at high pressures and temperatures
To study non-equilibrium processes for the synthesis of materials and coatings at the macro, meso, micro and nanostructured levels, it is advisable to supplement the basic principles of physicochemical analysis: continuity considering the energy dissipation during the formation of structures and...
2019 / Vityaz P.A., Kheifets M.L., Senyut V.T., Kolmakov A.G., Klimenko S.A.ВАКCAS -
Влияние фосфатов натрия на процесс отверждения гипса
Изучено влияние фосфата натрия, гидрофосфатов натрия, калия, аммония и дигидрофосфата натрия на процесс отверждения гипса. Исследована концентрационная зависимость ингибирующего действия каждой из солей в диапазоне концентраций 0,1-0,0031 М. Показано, что наибольшей ингибирующей активностью...
2019 / Гришковец В.И., Норкин А.С., Яковишин Л.А., Корж Е.Н.ВАК -
Синтез и исследование структурно-морфологических свойств кальций-дефицитного карбонатсодержащего гидроксиапатита в присутствии цитрат-ионов
В настоящей работе методом осаждения из водных растворов были получены образцы кальций-дефицитного карбонатсодержащего гидроксиапатита (Caд-КГАП) с различными мольными соотношениями Ca/(PO43-+CO32-). Синтез осуществляли в присутствии цитрат-ионов с целью ингибирования роста и предотвращения...
2019 / Трубицын М.А., Хоанг Вьет Хунг, Фурда Л.В.ВАК -
Deposition of silica in hydrometallurgical processes
Introduction/purpose: Dissolution of nonferrous metals from oxidic ores such as laterite, high silicon bauxite and eudialyte during acidic treatment was connected with silica gel formation. Methods: Familiarity with behavior of silica in hydrometallugical processes such as dissolution at...
2020 / Stopic Srecko R., Friedrich Bernd G. -
Study by infrared spectroscopic analysis of carbon-containing material obtained by the pyrolysis of rubber-technical products
today, using powdered carbon materials in the world, they obtain compositions and parts based on high molecular weight compounds with high strength, using them in the chemical, food, engineering, aerospace, industry, as well as in the manufacture of electrical appliances and military equipment....
2019 / Juraev Shohruh Tulkinovich, Mukhiddinov Bahodir Fakhriddinovich, Ibadullaev Akhmadzhon Sabirzhanovich -
Co-electrodeposition of thin Mo-S films
The co-electrodeposition process of Mo with S from aqueous electrolytes was investigated. It has been determined the range of potentials of co-electrodeposition of Mo with S by plotting the cyclic polarization curves on a Pt-electrode. When studying the obtained thin films by the methods of the...
2020 / Jafarova S.F. -
New simple and rapid spectrophotometric methods for the determination of trace level gold(III) using 2,2',3,4-tetrahydroxy-3'-sulpho-5'-chlorazobenzene presence of the cationic surfactants
It is shown that gold(III) with 2,2',3,4-tetrahydroxy-3'-sulpho-5'-chlorazobenzene (TSXAB) the rapid reacts in pH 5-6 acidic solution to form brownish-yellow complex and in pH 4-5 acidic solution to form brownish complexes in the presence of the cationic surfactants cetylpyridinium chloride (CPCl), ...
2020 / Mammadov P.R. -
Окислительное дегидрирование метициклопентана в метициклопентадиен-1,3 на модифицированных цеолитных катализаторах
Selective C-Cand C-Hbond activations are an important catalytic process to produce various value-added hydrocarbons oxidative dehydrogenation processes. For producing desired product with a high yield control of reaction pathway through the design of catalyst, fundamental understanding and...
2020 / Алиев А.М., Аббасов М.Я., Наджаф-Кулиев У.М., Шабанова З.А., Ализаде Г.А., Мирзоева Р.Ю. -
Physico-chemical interaction in the bisi-bitei system
Based on the results of the DTA and X-ray phase analysis, the phase equilibria in the BiTeI-BiSI system were studied and the T x phase diagram was constructed. It was established that the system is stable in the subsolidus area and there are ~7-8 mol % and ~5 mol% solid solution areas based on...
2020 / Ahmadov E.J. -
Effect of bentonite concentration on properties and regularity of crystallization of nanocomposite materials basis on the of mixtures of high and low density polyethylene
The results of research of the effect of bentonite concentration on the regularity of crystallization and the nature of changes of ultimate tensile strength, tensile yield strength and elongation at break of nanocomposite materials basis of on the mixtures of high and low density polyethylene...
2020 / Mustafayeva F.A., Kakhramanov N.T., Arzumanova N.B., Ishenko N.Ya., Ismayilov I.A. -
Synthesis, conversion and antimicrobial activity of derivatives of 2-hydroxy-1-haloidphenoxyethers of nonanol-2
Reactivity of hydroxyl group in 1-haloid-phenoxy-2-hydroxynonanes to nucleophilic substitution with acetoxymethylchloride was studied. It was found that regardless of the nature of haloids and their position in aryloxy radical the yields of acetoxymethyl ethers makes nearly 70% that proves high...
2020 / Mammadov S.A., Mahmudova A.A., Mammadova G.G., Hasanov V.S., Ladokhina N.P., Zeynalova L.F. -
SYNTHESIS AND STUDY OF THE POLYMERIZATION OF N-ALKYL-N-ALLYL-(β-CHLORO)ALLYLAMMONIUM DIHYDROPHOSPHATES
The polymerization reactions of the synthesized N-alkyl(methyl, n -butyl, n -heptyl, n -dodecyl)-N-allyl-N-(β-chloro)allylamines (AABA) were carried out in solutions of mineral acids (HCl, HNO3, H3PO4) in the presence of thermal initiators ammonium persulfate (AP) and azobis -isobutyric acide...
2020 / Garamanov A.M., Abdiev O.B., Husiev N.Kh., Ahmadova R.A., Abdullaev D.G., Allakhverdieva S.N., Ibrahimova M.M., Balaeva M.X. -
Ecological aspects of phenol decomposition in the basis of photolysis reactions
For the first time, there was carried out photochemical dissociation of phenol in the presence of TiO2 nanoparticles and methyl-3-aminocrotonate. It is established that 80% of phenol was decomposed. The process lasted for two hours. Results are confirmed by the mass-chromatography. The...
2020 / Gadirova E.M. -
Some aspects of oxycracking catalysts regeneration
On the basis of the results of derivatographic studies of catalyst samples for oxycracking of vacuum gas oil, it is establi shel that the surface of the spent catalyst is covered with 2 types of seal products: oxygen-containing organic oxidative seal products (OSP) and more stable oxygen-free...
2020 / Ajamov K.Y., Huseynova E.A., Mursalova L.A., Safarova S.R. -
Structure and morphology of cellulose from coconut coir fibers
Coir fibers, which constitute the biggest part of coconuts, have not been used to the fullest. One way to increase the value added to the coconut fibers is by extracting the cellulose. Delignification and bleaching can be carried out simultaneously in the process of extracting the cellulose from...
2018 / Pasang Patrik M., Yunianta, Estiasih Teti, HarijonoAGRIS -
Особенности ароматизации пропана на Zn-пентасилах, синтезированных с использованием различных структурообразователей
В данной работе приводятся результаты исследования влияния природы структурообразователя на физико-химические и каталитические свойства Zn-алюмосиликатов структурного типа цеолита MFI в процессе превращения пропана в ароматические углеводороды. С помощью метода термопрограммированной десорбции...
2019 / Восмериков Антон Александрович, Зайковский Владимир Иванович, Восмерикова Людмила Николаевна, Барбашин Яков Евгеньевич, Восмериков Александр ВладимировичВАК