Электронный каталог

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.

38.3
S70
Sokolova, Ya. А.
    The study of the properties and structure of cement binding composition on electrolyte acqueous solutions activated by mechanomagnetic method. [Текст] / Ya. А. Sokolova, M. V. Akulova, B. R. Isakulov, А. G. Sokolova [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 86-91
ББК 38.3

Рубрики: Строительные материалы

Кл.слова (ненормированные):
Cement compositions, -- mechanomagnetic activation -- electrolyte aqueous solutions -- differential thermo gravimetric analysis -- compressive strength -- structure formation of binders -- sodium thiosulphate -- calcium chloride
Аннотация: In the present paper, the issues of studying the influence of complex activation of grouting fluid on the structure and properties of the hardened cement paste and concrete are considered. The problem is relevant for manufacturing of building materials. In the paper, there was used the method of applying in the concrete mix composition of the elementary chemical substances undergone special physical treatment by means of mechanomagnetic activation. For more profound study of the structure formation processes in the hardened cement paste, the method of differential thermo gravimetric analysis has been used. As the research results have shown, the concrete samples on the activated electrolyte solutions are characterized by improved strength. In addition, on the base of differential thermo gravimetric analysis, it was proven that in the studied samples of the hardened cement paste on the electrolyte solutions activated by the method of mechanomagnetic treatment, the less calcium hydroxide and the more hydrated calcium silicate with amorphous and fine crystalline is formed. The obtained results for cement composites could be applied when manufacturing effective binder for concretes and mortars in the production of building materials and structures.
Держатели документа:
WKU
Доп.точки доступа:
Akulova, M.V.
Isakulov, B.R.
Sokolova, А.G.
Kul’sharov, B.B.
Isakulov, А.B.

24
K17
Кairbekov, Zh. К.
    Physicochemical and antioxidant properties of humic acids of low-mineralized peloids of the Tuzkol deposit. [Текст] / Zh. К. Кairbekov, I. M. Jeldybayeva, D. Z. Аbilmazhinova, S. M. Suimbayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №3. - P. 48-53
ББК 24

Рубрики: chemistry

Кл.слова (ненормированные):
Low-mineralized sludge sulphide mud (peloids) -- humic -- fulvic -- hymatomelanic -- humic acids -- antioxidant activity
Аннотация: As a result of studies it was found that the peloids of the deposit of Tuzkol Lake (Republic of Kazakhstan) are high quality medium-sulfide, weakly alkaline sludge muds. It was found that peloid-derived humic acid contains 49.63 % oxygen, 22.37% carbon, 9.65 % silicon and 6.26% calcium; it also contains Na, Mg, Al, Fe and an insignificant amount of S, Cl, K, F. Electron microscopy and IR spectroscopy analysis of the molecular structure of humic substances of peloids indicated that their macromolecule consists of framework olefinic and aromatic fragments with a substantial proportion of unoxidized aliphatic groups, as well as aromatic structures containing carboxyl groups. The findings of amperometric detection of the antioxidant properties of humic acids suggest that they have antioxidant activity, which will make it possible to use them as a biologically active substance for medicines.
Держатели документа:
WKU
Доп.точки доступа:
Jeldybayeva, I.M.
Аbilmazhinova, D.Z.
Suimbayeva, S.M.

35
A36
Aliyeva, N. T.
    Lubricating compositions for marine , locomotive and stationary diesels based on high -alkaline detergent-dispersant additives. [Текст] / N. T. Aliyeva, A. A. Javadova, K. Q. Efendiyeva, A. K. Mammadova, Z. K. Maharramova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №4. - P. 14-18
ББК 35

Рубрики: chemical Technology

Кл.слова (ненормированные):
base oil -- engine oil -- diesel engines -- marine diesels -- locomotive diesel -- stationary diesel -- ubricating composition -- alkaline number -- acid number -- alkylphenol -- ondensation
Аннотация: the article describes new modifications of alkylphenolate type additives synthesized in the ANAS ICA , new lubricating compositions of motor oils M-14 Г2and М-14Г2ЦС (ГОСТ 12337) were created using additives AKİ-150 and AKİ-115B, which are calcium salts of condensation products of methylene bisalkylphenol with formaldehyde, aminoacetic acid and monoethanolamine containingboron and nitrogen with high and medium acid number.
Держатели документа:
WKU
Доп.точки доступа:
Javadova, A.A.
Efendiyeva, K.Q.
Mammadova, A.K.
Maharramova, Z.K.

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.