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Genre:Естественные науки (natural_sciences)
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81-90 of 104
periodical press (Magazines)
MUKHAMETGAZY N.
Mukhametgazy, N. Oil Recovery at High Brine Salinity Conditions Using Amphoteric Terpolymer [Text] / N. Mukhametgazy, I. Sh. Gussenov , A. V. Shakhvorostov [et al.] // Bulletin of the Karaganda University. Chemistry series. - 2022. - № 3. - Р. 141-149. - Bibliogr.: p. 147-148 ISSN 2518-718Х.
UDC:
544
Subject headings
- Physical chemistry
Annotation
The viscosity and the oil recovery ability of high molecular weight amphoteric terpolymer (ATP) were tested in different brines and compared with hydrolyzed poly(acrylamide) (HPAM) which is traditionally used in enhanced oil recovery (EOR)
Keywords
amphoteric terpolymer, hydrolyzed poly, acrylamide, antipolyelectrolyte effect, sand pack model, water flooding, polymer flooding, oil recovery factor
Kazakhstan
0/0 Free
periodical press (Magazines)
USSIPBEK B. A.
Ussipbek, B. A. Oxidative stress and mitochondrial dysfunction [Text] / B. A. Ussipbek, L. C. López , N. T. Ablaikhanova [et al.] // Қазақстан Республикасы Ұлттық ғылым академиясының хабарлары. Биология және медицина сериясы. - 2020. - № 2 (338). - P. 31-40. - Bibliogr.: p. 39-40 ISSN 2224-5308.
UDC:
577.2
Subject headings
- Molecular Biology
Annotation
The article examines oxidative stress and mitochondrial dysfunction
Keywords
oxidative stress, reactive oxygen specie, mitochondria, mitochondrial diseases, coenzyme Q10, glutathione, тотығу стресі, митохондрия аурулары, окислительный стресс, митохондриальные заболеваний
Kazakhstan
0/0 Free
periodical press (Magazines)
MULDAKHMETOV Z. M.
Muldakhmetov, Z. M. Obtaining Carbon Sorbent from “Euromet” LLP Coke Breeze [Text] / Z. M. Muldakhmetov, A. T. Ordabaeva , M. G. Meiramov [et al.] // Қарағанды университетінің хабаршысы. Химия сериясы. - 2022. - № 2. - Р. 115-124. - Bibliogr.: p. 122-123 ISSN 2518-718Х.
UDC:
661.183
Subject headings
- Adsorbents
Annotation
The paper presents the results of a physicochemical analysis of a coke sample from “Euromet” LLP (Karaganda, Kazakhstan), which is carbonaceous material with high carbon content, the absence of volatiles matter and low ash content
Keywords
coke breeze, coals, sorbent, sorption capacity, ash content, bulk density
Kazakhstan
0/0 Free
periodical press (Magazines)
OLESHKO V. I.
Oleshko, V. I. Obtaining and studying the luminescent properties of zinc oxides synthesized in a stream of high-energy electrons [Text] / V. I. Oleshko Zixuan Li // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 4 (116). - P. 92-97. - Bibliogr.: p. 95-96 ISSN 2518-7198.
UDC:
535.37
Subject headings
- Luminescence
Annotation
The purpose of this work is to elucidate the possibility of radiation synthesis of ZnO nanocrystals using a powerful electron beam with energy of 1.4 MeV and a power density of 6‒10 kW/cm2released into the air at atmospheric pressure
Keywords
zinc oxide, radiation synthesis, nano- and microstructures, transmission electron microscopy, photoluminescence, мырыш оксиді, фотолюминесценция, оксид цинка
Kazakhstan
0/0 Free
periodical press (Magazines)
ASHUROV R. R.
Ashurov, R. R. On a non-local problem for a fractional differential equation of the Boussinesq type [Text] / R. R. Ashurov, Yu. E. Fayziev , M. U. Khudoykulova // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 34-45. - Bibliogr.: p. 44-45 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this paper, a non-local problem for the Boussinesq type equation Dαtu(t) +ADαtu(t) +ν2Au(t) = 0,0< t < T,1< α <3/2 is studied, where Dαt is the Caputo fractional derivative, and A is an abstract operator
Keywords
fractional equation, Caputo derivative, forward and inverse problems, Fourier method, Boussinesq type
Kazakhstan
0/0 Free
periodical press (Magazines)
OLĞAR H.
Olğar, H. Operator-pencil treatment of multi-interval Sturm-Liouville equation with boundary-transmission conditions [Text] / H. Olğar, F. Muhtarov , O. Mukhtarov // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 126-136. - Bibliogr.: p. 134-135 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations. Integral equations
Annotation
This paper is devoted to a new type of boundary-value problems for Sturm-Liouville equations defined on three disjoint intervals (−π, −π+d),(−π+d, π−d), and (π−d, π) together with eigenparameter dependent boundary conditions and with additional transmission conditions specified at the common end points −π+d and π−d, where 0< d < π
Keywords
boundary-value-transmission problems, eigenvalues, generalized eigenfunctions, lower boundestimation, Rayleigh’s method, transmission conditions
Kazakhstan
0/0 Free
periodical press (Magazines)
ARIPOV M. M.
Aripov, M. M. On stability of nonlinear difference equations and some of their applications [Text] / M. M. Aripov, D. Utebaev , B. D. Utebaev [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 3 (115). - P. 13-25. - Bibliogr.: p. 23-25 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
The issues of stability in solving nonlinear difference equations were considered
Keywords
nonlinear difference equations, difference schemes, a priori estimates, stability, difference equations
Kazakhstan
0/0 Free
periodical press (Magazines)
BENSASSA K.
Bensassa, K. On solution of non-linear FDE under tempered Ψ−Caputo derivative for the first-order and three-point boundary conditions [Text] / K. Bensassa, M. Benbachir , M. E. Samei [et al.] // Қарағанды университетінің хабаршысы. Математика сериясы. - 2024. - № 4 (116). - P. 41-56. - Bibliogr.: p. 54-56 ISSN 2518-7929.
UDC:
517.9
Subject headings
- Differential equations
Annotation
In this article, the existence and uniqueness of solutions for non-linear fractional differential equation with Tempered Ψ−Caputo derivative with three-point boundary conditions were studied
Keywords
fractional differential equations, tempered Ψ−Caputo derivative, nonlinear analysis, Schaefer’s fixed point theorem, Banach contraction
Kazakhstan
0/0 Free
periodical press (Magazines)
ALPYSSOVA G. K.
Alpyssova, G. K. Optical properties of ZnWO4 ceramics obtained by radiation synthesis [Text] / G. K. Alpyssova, D. A. Afanasyev , Zh. K. Bakiyeva [et al.] // Қарағанды университетінің хабаршысы. Физика сериясы. - 2024. - № 3 (115). - P. 51-60. - Bibliogr.: p. 57-59 ISSN 2518-7198.
UDC:
535.37
Subject headings
- Luminescence
Annotation
The morphology of the surface, X-ray diffraction spectra and optical properties of ZnWO4 ceramics obtained by radiation synthesis were studied
Keywords
radiation synthesis, zinc tungstate, X-ray diffraction spectra, EDX analysis, power density, optical properties of ceramics, люминесценция, радиациялық cинтез, радиационный синтез
Kazakhstan
0/0 Free
periodical press (Magazines)
UTEULIN K. R.
Uteulin, K. R. On necessity of restoration of the degraded kok saghyz population [Text] / K. R. Uteulin, I. O. Baitulin // Қазақстан Республикасы Ұлттық ғылым академиясының баяндамалары. - 2017. - № 2. - P. 56-58. - Bibliogr.: p. 58 ISSN 2224-5227.
UDC:
582.998.1
Subject headings
- Compositae (Asteraceae)
Annotation
In this article, the challenges associated with the declining productivity of traditional Hevea brasiliensis plantations and the increasing global demand for natural rubber are discussed in the context of introducing the rare Kazakhstani Red Book species Taraxacum kok-saghyz into cultivation
Keywords
kok-saghyz, population, degradation, botany, biology, көк-сағыз
Kazakhstan
0/0 Free
MUKHAMETGAZY N.
OIL RECOVERY AT HIGH BRINE SALINITY CONDITIONS USING AMPHOTERIC TERPOLYMER
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
periodical press (Magazines)
0/0 Free
OLESHKO V. I.
OBTAINING AND STUDYING THE LUMINESCENT PROPERTIES OF ZINC OXIDES SYNTHESIZED IN A STREAM OF HIGH-ENERGY ELECTRONS
periodical press (Magazines)
0/0 Free
ASHUROV R. R.
ON A NON-LOCAL PROBLEM FOR A FRACTIONAL DIFFERENTIAL EQUATION OF THE BOUSSINESQ TYPE
periodical press (Magazines)
0/0 Free
OLĞAR H.
OPERATOR-PENCIL TREATMENT OF MULTI-INTERVAL STURM-LIOUVILLE EQUATION WITH BOUNDARY-TRANSMISSION CONDITIONS
periodical press (Magazines)
0/0 Free
ARIPOV M. M.
ON STABILITY OF NONLINEAR DIFFERENCE EQUATIONS AND SOME OF THEIR APPLICATIONS
periodical press (Magazines)
0/0 Free
BENSASSA K.
ON SOLUTION OF NON-LINEAR FDE UNDER TEMPERED Ψ−CAPUTO DERIVATIVE FOR THE FIRST-ORDER AND THREE-POINT BOUNDARY CONDITIONS
periodical press (Magazines)
0/0 Free
ALPYSSOVA G. K.
OPTICAL PROPERTIES OF ZNWO4 CERAMICS OBTAINED BY RADIATION SYNTHESIS
periodical press (Magazines)
0/0 Free
UTEULIN K. R.
ON NECESSITY OF RESTORATION OF THE DEGRADED KOK SAGHYZ POPULATION
periodical press (Magazines)
0/0 Free