Электронный каталог

24
А 15
Abildina, A.K.
    Reduction of magnesium on a bismuth substrate in dimethylformamide solution [Текст] = Восстановление магния на висмутовом подложке в диметилформамидной среде / A.K. Abildina, A.M. Agimbayeva, D.A. Urazkeldiyeva // ҚР ҰҒА баяндамалары = Доклады НАН РК. - 2019. - №2. - С. 32-38
ББК 24

Рубрики: Химические науки

Кл.слова (ненормированные):
магний-ионные батареи -- висмут -- электрод -- анод -- диметилформамид -- восстановление -- химия
Аннотация: Было получено модифицированный анодный материал методом восстановления магния на висмутовый электрод Mg(ClO4)2/диметилформамид (ДМФА) системе. Структура и состав полученного анодного материала определялись с помощью сканирующего электронного микроскопа и рентгено-спектрального микроанализа. Анализ поляризационных кривых выявил электрохимические свойства интерметаллида Mg-Bi в ранее неизученной системе Mg(ClO4)2/ДМФА и процесс обратимости. Циклические вольтамперограммы показали, что процессы в системе квазиобратимы. Доказано, что процесс электронного обмена осуществляется путем диффузии.
Держатели документа:
ЗКГУ
Доп.точки доступа:
Agimbayeva, A.M.
Urazkeldiyeva, D.A.

24(5каз)
M46
Medeuova, G. Z.
    Research on the chemical composition of snow of Almaty city. [Текст] / G. Z. Medeuova, K. N. Zhaikbay, K. O. Kishibayev // Reports of the National Academy of Sciences of the Republic of Kazakhstan. - 2020. - №4. - P. 65-70
ББК 24(5каз)

Рубрики: chemistry

Кл.слова (ненормированные):
carbon oxides -- Natrium -- Magnesium -- Silicon -- Potassium -- Sodium -- Calcium -- Iron -- Chrome -- Copper -- Cadmium -- Polyphosphates -- characteristics of snow in Almaty
Аннотация: The article snows that according to the data of Kazgidromet from 2014-2015 years , Almaty takes one of the first places among the cities of Kazakhstan in terms of air pollution.
Держатели документа:
WKU
Доп.точки доступа:
Zhaikbay, K.N.
Kishibayev, K.O.

24
Z63
Zhumabek, M.
    Ni-Al-Mg-Mn composite catalysts for partial oxidation of natural gas. [Текст] / M. Zhumabek, G. N. Kaumenova, A. Manabayeva, R. O. Sarsenova, S. O. Kotov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 19-26
ББК 24

Рубрики: chemistry

Кл.слова (ненормированные):
catalytic oxidation -- methane -- synthesis-gas -- nickel -- magnesium
Аннотация: the problem of rational utilization of natural and associated petroleum gases and the cessation of their flaring is one of the acute and unresolved environmental problems. The aim of this work is to develop effective thermally stable catalysts ofa new generation for the processes of oxidative conversion of light alkanes of natural and associated gas into synthesis gas. The results of partial oxidation of the methane of natural gas on the catalysts prepared by solution combustion synthesis are presented. Investigation of the activity of catalysts produced from initial mixture of Ni(NO3)2-Al(NO3)3-Mg(NO3)2-Mn(NO3)2+ urea of different composition was carried out for the production of synthesis-gas. It was found that the optimal conditions for producing of synthesis-gas are: CH4conversion higher than 95%, yield of target products: Н2-97 -99% and СО -40 -43%, Т = 900оС, space velocity –2500 and 6500 h-1. The catalysts were studied by X-ray diffraction, transmission electron microscopy, specific surface area, pore volume and average pore diameter. The presence in the catalysts of simple and mixed oxides, metal aluminates and spinel-type structures, the presence of which contributes to the active work of catalysts for oxidativeconversion of CH4, has been established.
Держатели документа:
WKU
Доп.точки доступа:
Kaumenova, G.N.
Manabayeva, A.
Sarsenova, R.O.
Kotov, S.O.

24
I-32
Ibrayev, M. K.
    Obtaining of water -soluble chelate forms of calcium and magnesium humate. [Текст] / M. K. Ibrayev // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 27-31
ББК 24

Рубрики: chemistry

Кл.слова (ненормированные):
calcium and magnesium humates -- chelate comple -- fertilizer -- crop production
Аннотация: this article analyzes the method of obtaining water-soluble chelated forms of calcium and magnesium humates for use as additives in the cultivation of agricultural crops. Humic substances, in turn, are an environmentally friendly, as well as an affordable type of sorbents. In the near future, humic substances are increasingly used in various sectors of agriculture. They are in the form of soluble humates, with progress being used as stabilizers of clay mixtures, which are used in oil drilling, as well as for the production of dyes for wood species. And very promising is the introduction of humic acids in the form of soluble humates in the rural economy as growth stimulants.
Держатели документа:
WKU
Доп.точки доступа:
Issabayeva, M.B.
Tusupova, A.S.
Amanzholova, А.S.
Kuandykova , A.A.