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Жанр:Естественные науки (natural_sciences)
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81-90 из 104
периодические издания(Журналы)
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.
УДК:
544
Предметная рубрика
- Physical chemistry
Аннотация
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)
Ключевые слова
amphoteric terpolymer, hydrolyzed poly, acrylamide, antipolyelectrolyte effect, sand pack model, water flooding, polymer flooding, oil recovery factor
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
577.2
Предметная рубрика
- Molecular Biology
Аннотация
The article examines oxidative stress and mitochondrial dysfunction
Ключевые слова
oxidative stress, reactive oxygen specie, mitochondria, mitochondrial diseases, coenzyme Q10, glutathione, тотығу стресі, митохондрия аурулары, окислительный стресс, митохондриальные заболеваний
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
661.183
Предметная рубрика
- Adsorbents
Аннотация
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
Ключевые слова
coke breeze, coals, sorbent, sorption capacity, ash content, bulk density
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
535.37
Предметная рубрика
- Luminescence
Аннотация
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
Ключевые слова
zinc oxide, radiation synthesis, nano- and microstructures, transmission electron microscopy, photoluminescence, мырыш оксиді, фотолюминесценция, оксид цинка
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
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
Ключевые слова
fractional equation, Caputo derivative, forward and inverse problems, Fourier method, Boussinesq type
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations. Integral equations
Аннотация
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
Ключевые слова
boundary-value-transmission problems, eigenvalues, generalized eigenfunctions, lower boundestimation, Rayleigh’s method, transmission conditions
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
The issues of stability in solving nonlinear difference equations were considered
Ключевые слова
nonlinear difference equations, difference schemes, a priori estimates, stability, difference equations
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
517.9
Предметная рубрика
- Differential equations
Аннотация
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
Ключевые слова
fractional differential equations, tempered Ψ−Caputo derivative, nonlinear analysis, Schaefer’s fixed point theorem, Banach contraction
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
535.37
Предметная рубрика
- Luminescence
Аннотация
The morphology of the surface, X-ray diffraction spectra and optical properties of ZnWO4 ceramics obtained by radiation synthesis were studied
Ключевые слова
radiation synthesis, zinc tungstate, X-ray diffraction spectra, EDX analysis, power density, optical properties of ceramics, люминесценция, радиациялық cинтез, радиационный синтез
Казахстаника
0/0 Свободно
периодические издания(Журналы)
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.
УДК:
582.998.1
Предметная рубрика
- Compositae (Asteraceae)
Аннотация
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
Ключевые слова
kok-saghyz, population, degradation, botany, biology, көк-сағыз
Казахстаника
0/0 Свободно
MUKHAMETGAZY N.
OIL RECOVERY AT HIGH BRINE SALINITY CONDITIONS USING AMPHOTERIC TERPOLYMER
периодические издания(Журналы)
0/0 Свободно
периодические издания(Журналы)
0/0 Свободно
MULDAKHMETOV Z. M.
OBTAINING CARBON SORBENT FROM “EUROMET” LLP COKE BREEZE
периодические издания(Журналы)
0/0 Свободно
OLESHKO V. I.
OBTAINING AND STUDYING THE LUMINESCENT PROPERTIES OF ZINC OXIDES SYNTHESIZED IN A STREAM OF HIGH-ENERGY ELECTRONS
периодические издания(Журналы)
0/0 Свободно
ASHUROV R. R.
ON A NON-LOCAL PROBLEM FOR A FRACTIONAL DIFFERENTIAL EQUATION OF THE BOUSSINESQ TYPE
периодические издания(Журналы)
0/0 Свободно
OLĞAR H.
OPERATOR-PENCIL TREATMENT OF MULTI-INTERVAL STURM-LIOUVILLE EQUATION WITH BOUNDARY-TRANSMISSION CONDITIONS
периодические издания(Журналы)
0/0 Свободно
ARIPOV M. M.
ON STABILITY OF NONLINEAR DIFFERENCE EQUATIONS AND SOME OF THEIR APPLICATIONS
периодические издания(Журналы)
0/0 Свободно
BENSASSA K.
ON SOLUTION OF NON-LINEAR FDE UNDER TEMPERED Ψ−CAPUTO DERIVATIVE FOR THE FIRST-ORDER AND THREE-POINT BOUNDARY CONDITIONS
периодические издания(Журналы)
0/0 Свободно
ALPYSSOVA G. K.
OPTICAL PROPERTIES OF ZNWO4 CERAMICS OBTAINED BY RADIATION SYNTHESIS
периодические издания(Журналы)
0/0 Свободно
UTEULIN K. R.
ON NECESSITY OF RESTORATION OF THE DEGRADED KOK SAGHYZ POPULATION
периодические издания(Журналы)
0/0 Свободно