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41.
Подробнее
22.3
T15
Taimuratova, L. U.
Negative longitudinal magnetoresistance silikon on interline electron transitions. [Текст] / L. U. Taimuratova, O. D. Bigozha, A. Zh. Kazbekova, Z. K. Aimaganbetova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №6. - P. 37-41
ББК 22.3
Рубрики: physics
Кл.слова (ненормированные):
piezo resistance -- negative magnetoresistance -- uniaxial pressure -- is energetic -- multivalley model -- valley crossing
Аннотация: The article presents experimental results obtained by studying the magnetoresistance of n-type silicon with an electron concentration of. nе=3,1-1013см-3 in the temperature range of 77.4-300K.There is a negative longitudinal magnetoresistance due to the redistribution of electrons between thevalleys. Experimental results are compared with existing theories and a good agreement is obtained bothquantitatively and qualitatively. At H=350 kE, the energy gap between the lowest Landau subzones is 7 MeV.These experimental results obtained in n-type silicon clearly demonstrate the reliability of the mechanismof negative magnetoresistance caused, indeed, by the pumping of current carriers between the valleys of theconduction band, shifting along the energy scale in a quantizing magnetic field at different speeds. The isenergetic surface of the bottom of the silicon conduction band consists of six ellipsoids located on the mainaxes of the cube, which causes anisotropy of the effective mass and relaxation time. The latter determines thefeatures of galvanomagnetic effects. Especially magnetoresistance is the most sensitive to the anisotropy ofthe is energetic surface. The influence of the latter on magnetoresistance is most clearly revealed in the regionof strong magnetic fields, where magnetoresistance is saturated.
Держатели документа:
WKU
Доп.точки доступа:
Bigozha, O.D.
Kazbekova, A. Zh.
Aimaganbetova, Z.K.
T15
Taimuratova, L. U.
Negative longitudinal magnetoresistance silikon on interline electron transitions. [Текст] / L. U. Taimuratova, O. D. Bigozha, A. Zh. Kazbekova, Z. K. Aimaganbetova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №6. - P. 37-41
Рубрики: physics
Кл.слова (ненормированные):
piezo resistance -- negative magnetoresistance -- uniaxial pressure -- is energetic -- multivalley model -- valley crossing
Аннотация: The article presents experimental results obtained by studying the magnetoresistance of n-type silicon with an electron concentration of. nе=3,1-1013см-3 in the temperature range of 77.4-300K.There is a negative longitudinal magnetoresistance due to the redistribution of electrons between thevalleys. Experimental results are compared with existing theories and a good agreement is obtained bothquantitatively and qualitatively. At H=350 kE, the energy gap between the lowest Landau subzones is 7 MeV.These experimental results obtained in n-type silicon clearly demonstrate the reliability of the mechanismof negative magnetoresistance caused, indeed, by the pumping of current carriers between the valleys of theconduction band, shifting along the energy scale in a quantizing magnetic field at different speeds. The isenergetic surface of the bottom of the silicon conduction band consists of six ellipsoids located on the mainaxes of the cube, which causes anisotropy of the effective mass and relaxation time. The latter determines thefeatures of galvanomagnetic effects. Especially magnetoresistance is the most sensitive to the anisotropy ofthe is energetic surface. The influence of the latter on magnetoresistance is most clearly revealed in the regionof strong magnetic fields, where magnetoresistance is saturated.
Держатели документа:
WKU
Доп.точки доступа:
Bigozha, O.D.
Kazbekova, A. Zh.
Aimaganbetova, Z.K.
42.
Подробнее
35
K80
Kozhabekov, S. S.
Modification of copolymers based on olefin and maleic anhydride as pour point depressant for waxy oils. [Текст] / S. S. kozhabekov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 30-37
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
oil -- copolymers -- modification -- waxes -- fluidity -- rheometry -- pour point -- viscosity
Аннотация: In this work, we investigated a modification of a copolymer based on α-olefin (octadecene-1) (ODC) and maleic anhydride (MA) synthesized by the method of initiated radical polymerization. In the studies carried out, it was revealed that of all the synthesized copolymers based on maleic anhydride, the copolymer with α-octadecene was the most effective copolymer in reducing the viscosity of oil and TPT. In this work, a copolymer based on maleic anhydride and octadecene-1 (ODC – MA) was modified with primary amines – butylamine (BA), hexylamine (HA), hexadecylamine (HDA), octadecylamine (ODA), benzylamine (BzA).
Держатели документа:
WKU
Доп.точки доступа:
Zhubanov, A.A.
Makhmetova, A.R.
Abaev, T.B.
K80
Kozhabekov, S. S.
Modification of copolymers based on olefin and maleic anhydride as pour point depressant for waxy oils. [Текст] / S. S. kozhabekov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 30-37
Рубрики: chemical Technology
Кл.слова (ненормированные):
oil -- copolymers -- modification -- waxes -- fluidity -- rheometry -- pour point -- viscosity
Аннотация: In this work, we investigated a modification of a copolymer based on α-olefin (octadecene-1) (ODC) and maleic anhydride (MA) synthesized by the method of initiated radical polymerization. In the studies carried out, it was revealed that of all the synthesized copolymers based on maleic anhydride, the copolymer with α-octadecene was the most effective copolymer in reducing the viscosity of oil and TPT. In this work, a copolymer based on maleic anhydride and octadecene-1 (ODC – MA) was modified with primary amines – butylamine (BA), hexylamine (HA), hexadecylamine (HDA), octadecylamine (ODA), benzylamine (BzA).
Держатели документа:
WKU
Доп.точки доступа:
Zhubanov, A.A.
Makhmetova, A.R.
Abaev, T.B.
43.
Подробнее
24
N94
Nurdillayeva, R. N.
Electrochemical behavior of cupronickel electrode in acidic media. [Текст] / R. N. Nurdillayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 38-46
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
cupronickel -- Cu-Ni alloy -- alternating current -- titanium electrode -- hydrochloric acid -- electrolysis -- current density -- current efficiency
Аннотация: The electrochemical properties of the cupronickel electrode polarized by an alternating current in an aqueous solution of hydrochloric acid were studied for the first time. The electrochemical dissolution of cupronickel was carried out in a polarization mode with a frequency of 50 Hz in pairs with a titanium electrode. The current efficiency of dissolution of Cu-Ni alloys dependence on the current density at the titanium (20-120 kA/m2) and cupronickel (200-1200 A/m2) electrodes, the concentration of a hydrochloric acid solution (0.5-5.0 M), the electrolysis duration (0.5-1.75 h) and the alternating current effect (50-300 Hz) were considered. It was observed that the current efficiency of the alloy dissolution decreases linearly with increasing current density at the cupronickel electrode, while the current density at the titanium electrode passes through a maximum value at 60 kA/m2.
Держатели документа:
WKU
Доп.точки доступа:
Abdilda, N. Sh.
Bayeshov, A.B.
N94
Nurdillayeva, R. N.
Electrochemical behavior of cupronickel electrode in acidic media. [Текст] / R. N. Nurdillayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 38-46
Рубрики: chemistry
Кл.слова (ненормированные):
cupronickel -- Cu-Ni alloy -- alternating current -- titanium electrode -- hydrochloric acid -- electrolysis -- current density -- current efficiency
Аннотация: The electrochemical properties of the cupronickel electrode polarized by an alternating current in an aqueous solution of hydrochloric acid were studied for the first time. The electrochemical dissolution of cupronickel was carried out in a polarization mode with a frequency of 50 Hz in pairs with a titanium electrode. The current efficiency of dissolution of Cu-Ni alloys dependence on the current density at the titanium (20-120 kA/m2) and cupronickel (200-1200 A/m2) electrodes, the concentration of a hydrochloric acid solution (0.5-5.0 M), the electrolysis duration (0.5-1.75 h) and the alternating current effect (50-300 Hz) were considered. It was observed that the current efficiency of the alloy dissolution decreases linearly with increasing current density at the cupronickel electrode, while the current density at the titanium electrode passes through a maximum value at 60 kA/m2.
Держатели документа:
WKU
Доп.точки доступа:
Abdilda, N. Sh.
Bayeshov, A.B.
44.
Подробнее
24
M96
Murzakassymova, N. C.
Modified sorbents and their application for extraction of metal ions. [Текст] / N. C. Murzakassymova, N. A. Bektenov, M. A. Gavrilenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 75-79
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
coal -- sorbents -- modification -- sorption isotherm -- sorbent capacity -- oleum
Аннотация: The data on accumulated mining waste in the territory of Kazakhstan are presented. Their processing has become very important in our time. The structure of surface-modified carbon materials with a grafted layer is given. New modified carbon sorbents were obtained, oleum was used as a modifying agent. It was revealed that the capacitive characteristics of the modified sorbent are significantly higher than that of the original one, which will make it possible to more efficiently extract the metal ion from wastewater and technogenic formations. Sorption is an effective method of extracting valuable components from wastewater and man-made formations. This method allows you to recover valuable substances with a high degree of wastewater treatment, which can be purified to the maximum permissible concentration of pollutants and then used in technological processes or in recycling water supply systems. Processing involves ores characterized by a low content of valuable components, fine dissemination and similar technological properties of minerals. The existing technologies for the development of minerals make it possible to use only a small part of the valuable mineral mass extracted from the subsoil, and the rest forms waste, which, as it accumulates and is stored, becomes one of the most significant factors of anthropogenic changes in the environment.
Держатели документа:
WKU
Доп.точки доступа:
Bektenov, N. A.
Gavrilenko, M. A.
M96
Murzakassymova, N. C.
Modified sorbents and their application for extraction of metal ions. [Текст] / N. C. Murzakassymova, N. A. Bektenov, M. A. Gavrilenko // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 75-79
Рубрики: chemistry
Кл.слова (ненормированные):
coal -- sorbents -- modification -- sorption isotherm -- sorbent capacity -- oleum
Аннотация: The data on accumulated mining waste in the territory of Kazakhstan are presented. Their processing has become very important in our time. The structure of surface-modified carbon materials with a grafted layer is given. New modified carbon sorbents were obtained, oleum was used as a modifying agent. It was revealed that the capacitive characteristics of the modified sorbent are significantly higher than that of the original one, which will make it possible to more efficiently extract the metal ion from wastewater and technogenic formations. Sorption is an effective method of extracting valuable components from wastewater and man-made formations. This method allows you to recover valuable substances with a high degree of wastewater treatment, which can be purified to the maximum permissible concentration of pollutants and then used in technological processes or in recycling water supply systems. Processing involves ores characterized by a low content of valuable components, fine dissemination and similar technological properties of minerals. The existing technologies for the development of minerals make it possible to use only a small part of the valuable mineral mass extracted from the subsoil, and the rest forms waste, which, as it accumulates and is stored, becomes one of the most significant factors of anthropogenic changes in the environment.
Держатели документа:
WKU
Доп.точки доступа:
Bektenov, N. A.
Gavrilenko, M. A.
45.
Подробнее
28
K42
Khalmurzayeva, B. A.
Biochemical indicators and application of Cyanobacteria Spirulina Microalgae in the cattle feedstuff. [Текст] / B. A. Khalmurzayeva, B. Sh. Ismailkhodjaev, K. P. Kuatbekova, R. S. Alibekov [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 80-88
ББК 28
Рубрики: Biology
Кл.слова (ненормированные):
antioxidants -- biologically active substances -- cultivation -- genus -- microalgae -- phyto-cultures -- Spirulina
Аннотация: The qualitative and quantitative compositions of the valuable biologically active substances, species and strains of microalgae are related the genus of CyanobacteriaSp.platensis and Sp.labgrinthifosmis that were isolated from local nature and grown in semi-production facilities were considered. In order to adapt for mass cultivation, algae were first grown in greenhouse conditions. The algae were cultivated within 12 days. The produc-tivity in the tubular cultivator with stirring of Sp.platensis was 3.8 g / l, protein (73.0%), and Sp.laberinthiformis was 2.6 g / l of protein (63.1%). Similar studies were carried out in the open-air conditions that showed an increase in the amount of illumination causes a significant restructuring of the entire photosynthetic apparatus of algae. The accumulation of Sp.labyrinthiformis 2.7 g / l a.d.c., protein 62.21%, and Sp.platensis 4.08 g / l, protein 75.3%, were within 10 days. The content of protein and carotenes sharply increases in comparison with the greenhouse conditions. It was found that the addition of Sp.platensis suspension, as a protein-vitamin supplement for the bulls’ feedstuff, stimulates physiological processes that improves the biochemical parameters of their blood, the digestibility coefficient of nutrients by 8-9%, positive mineral balance, increases live weight gain (17.4%) and slaughter yield of the bulls (3.6%). So, the suspension of Sp.platensis is recommended for use as a protein-vitamin supplement in livestock farms that will allow having a significant economic effect in livestock farming, in average 20-25% profits per yearly.
Держатели документа:
WKU
Доп.точки доступа:
Ismailkhodjaev, B. Sh.
Kuatbekova, K. P.
Alibekov, R. S.
Makhatova, A. I.
Meimanbaeva, S. S.
K42
Khalmurzayeva, B. A.
Biochemical indicators and application of Cyanobacteria Spirulina Microalgae in the cattle feedstuff. [Текст] / B. A. Khalmurzayeva, B. Sh. Ismailkhodjaev, K. P. Kuatbekova, R. S. Alibekov [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 80-88
Рубрики: Biology
Кл.слова (ненормированные):
antioxidants -- biologically active substances -- cultivation -- genus -- microalgae -- phyto-cultures -- Spirulina
Аннотация: The qualitative and quantitative compositions of the valuable biologically active substances, species and strains of microalgae are related the genus of CyanobacteriaSp.platensis and Sp.labgrinthifosmis that were isolated from local nature and grown in semi-production facilities were considered. In order to adapt for mass cultivation, algae were first grown in greenhouse conditions. The algae were cultivated within 12 days. The produc-tivity in the tubular cultivator with stirring of Sp.platensis was 3.8 g / l, protein (73.0%), and Sp.laberinthiformis was 2.6 g / l of protein (63.1%). Similar studies were carried out in the open-air conditions that showed an increase in the amount of illumination causes a significant restructuring of the entire photosynthetic apparatus of algae. The accumulation of Sp.labyrinthiformis 2.7 g / l a.d.c., protein 62.21%, and Sp.platensis 4.08 g / l, protein 75.3%, were within 10 days. The content of protein and carotenes sharply increases in comparison with the greenhouse conditions. It was found that the addition of Sp.platensis suspension, as a protein-vitamin supplement for the bulls’ feedstuff, stimulates physiological processes that improves the biochemical parameters of their blood, the digestibility coefficient of nutrients by 8-9%, positive mineral balance, increases live weight gain (17.4%) and slaughter yield of the bulls (3.6%). So, the suspension of Sp.platensis is recommended for use as a protein-vitamin supplement in livestock farms that will allow having a significant economic effect in livestock farming, in average 20-25% profits per yearly.
Держатели документа:
WKU
Доп.точки доступа:
Ismailkhodjaev, B. Sh.
Kuatbekova, K. P.
Alibekov, R. S.
Makhatova, A. I.
Meimanbaeva, S. S.
46.
Подробнее
35
A44
Altayeva, A.
Study of gold extraction from stale tailings by agitation leaching. [Текст] / A. Altayeva, B. N. Surimbayev, L. S. Bolotova, Zh. Т. Bagasharova, Sh. K. Akilbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 89-94
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
stale tailings -- stale tailings of the processing plant -- leaching -- technogenic mineral formations -- gold
Аннотация: The object of research is technogenic mineral formations-tailings of the Bestube processing plant located within the Bestube gold field. Analytical and technological studies of stale tailings have been carried out. According to the results of analytical studies, the material composition of stale tails was established. The average gold content in stale tailings according to assay analyses is 0.565 g/t, silver 1.56 g/t. The tailings belong to the category of poor sulfide, oxidized raw materials. The main industrially valuable component in the tailings is gold, silver has a subordinate value, and other metals are not of industrial value. Mineralogical analysis established that stale tails are represented by quartz, muscovite, clinochlore, albite, dolomite. Studies were conducted on agitation leaching of stale tailings of the initial size (64.08% of the class –0.074 mm) and after additional grinding to the size of 90% of the class –0.074 mm. Reducing the size contributes to the dissolution of gold from the tailings: at the initial size, 66.28% of gold is dissolved, after regrinding the degree of dissolution of gold from the tailings increases to 87.23%. The results of research on agitation leaching of gold have shown a high efficiency of hydrometallurgical technology for processing stale tailings of a processing plant.
Держатели документа:
WKU
Доп.точки доступа:
Surimbayev, B. N.
Bolotova, L. S.
Bagasharova, Zh. Т.
Akilbekova, Sh. K.
A44
Altayeva, A.
Study of gold extraction from stale tailings by agitation leaching. [Текст] / A. Altayeva, B. N. Surimbayev, L. S. Bolotova, Zh. Т. Bagasharova, Sh. K. Akilbekova // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №1. - P. 89-94
Рубрики: chemical Technology
Кл.слова (ненормированные):
stale tailings -- stale tailings of the processing plant -- leaching -- technogenic mineral formations -- gold
Аннотация: The object of research is technogenic mineral formations-tailings of the Bestube processing plant located within the Bestube gold field. Analytical and technological studies of stale tailings have been carried out. According to the results of analytical studies, the material composition of stale tails was established. The average gold content in stale tailings according to assay analyses is 0.565 g/t, silver 1.56 g/t. The tailings belong to the category of poor sulfide, oxidized raw materials. The main industrially valuable component in the tailings is gold, silver has a subordinate value, and other metals are not of industrial value. Mineralogical analysis established that stale tails are represented by quartz, muscovite, clinochlore, albite, dolomite. Studies were conducted on agitation leaching of stale tailings of the initial size (64.08% of the class –0.074 mm) and after additional grinding to the size of 90% of the class –0.074 mm. Reducing the size contributes to the dissolution of gold from the tailings: at the initial size, 66.28% of gold is dissolved, after regrinding the degree of dissolution of gold from the tailings increases to 87.23%. The results of research on agitation leaching of gold have shown a high efficiency of hydrometallurgical technology for processing stale tailings of a processing plant.
Держатели документа:
WKU
Доп.точки доступа:
Surimbayev, B. N.
Bolotova, L. S.
Bagasharova, Zh. Т.
Akilbekova, Sh. K.
47.
Подробнее
28.072
E54
Encapsulation of vitamin aevit oil solution with β-cyclodextrin [Текст] / A. Iskineyeva, A. Mustafayeva, G. Zamaratskaya [и др.] // Доклады национальной академии наук Республики Казахстан. - 2021. - №1. - Р. 5-13
ББК 28.072
Рубрики: Общая биохимия
Кл.слова (ненормированные):
циклодекстрины -- β-циклодекстрин -- инкапсуляция -- клатрат -- витамин
Аннотация: Настоящая работа направлена на инкапсуляцию жирорастворимого витамина Аевит (вита- мины А и Е, масло) с β-циклодекстрином. Комплекс включения витаминов А и Е с β-циклодекстрином готовили в водно-спиртовой среде методом ультразвуковой обработки. Морфология поверхности полу- ченных комплексов клатратных включений описана с помощью сканирующего электронного микроскопа. Представлены результаты термографических измерений на дифференциальном сканирующем калориметре. Спектральные свойства комплекса включения характеризуются данными ЯМР-спектроскопии 1Н и 13С. Экспериментальные результаты подтвердили существование комплекса включения β-циклодекстрина с витамином Аевит (2:1). Рассчитана энергия активации реакции термоокислительной деструкции клатратного комплекса β-циклодекстрин: рассчитан витамин Аевит, определены кинетические параметры термо- деструкции клатрата. Данные параметры определялись на основе методов Freeman-Carroll, Sharpe-Wentworth, Ahar and Coates-Redfern. Использование приведенных выше моделей позволило графически установить термодинамические параметры термического разложения β-циклодекстрина и его клатрата с витамином. Данные термографических измерений на дифференциальном сканирующем калориметре показали, что термодеструкция клатрата Аевита с β-циклодекстрином начинается с удаления молекул воды из полости β-циклодекстрина, затем разрушаются “гостевое” вещество и циклический олигосахарид.
Держатели документа:
ЗКУ
Доп.точки доступа:
Iskineyeva, A.
Mustafayeva, A.
Zamaratskaya, G.
Sarsenbekova, A.
Fazylov, S.
Burkeev, M.
Nurkenov, O.
Seilkhanov, T.
Bakirova, R.
E54
Encapsulation of vitamin aevit oil solution with β-cyclodextrin [Текст] / A. Iskineyeva, A. Mustafayeva, G. Zamaratskaya [и др.] // Доклады национальной академии наук Республики Казахстан. - 2021. - №1. - Р. 5-13
Рубрики: Общая биохимия
Кл.слова (ненормированные):
циклодекстрины -- β-циклодекстрин -- инкапсуляция -- клатрат -- витамин
Аннотация: Настоящая работа направлена на инкапсуляцию жирорастворимого витамина Аевит (вита- мины А и Е, масло) с β-циклодекстрином. Комплекс включения витаминов А и Е с β-циклодекстрином готовили в водно-спиртовой среде методом ультразвуковой обработки. Морфология поверхности полу- ченных комплексов клатратных включений описана с помощью сканирующего электронного микроскопа. Представлены результаты термографических измерений на дифференциальном сканирующем калориметре. Спектральные свойства комплекса включения характеризуются данными ЯМР-спектроскопии 1Н и 13С. Экспериментальные результаты подтвердили существование комплекса включения β-циклодекстрина с витамином Аевит (2:1). Рассчитана энергия активации реакции термоокислительной деструкции клатратного комплекса β-циклодекстрин: рассчитан витамин Аевит, определены кинетические параметры термо- деструкции клатрата. Данные параметры определялись на основе методов Freeman-Carroll, Sharpe-Wentworth, Ahar and Coates-Redfern. Использование приведенных выше моделей позволило графически установить термодинамические параметры термического разложения β-циклодекстрина и его клатрата с витамином. Данные термографических измерений на дифференциальном сканирующем калориметре показали, что термодеструкция клатрата Аевита с β-циклодекстрином начинается с удаления молекул воды из полости β-циклодекстрина, затем разрушаются “гостевое” вещество и циклический олигосахарид.
Держатели документа:
ЗКУ
Доп.точки доступа:
Iskineyeva, A.
Mustafayeva, A.
Zamaratskaya, G.
Sarsenbekova, A.
Fazylov, S.
Burkeev, M.
Nurkenov, O.
Seilkhanov, T.
Bakirova, R.
48.
Подробнее
42.14
N24
Nasiyev, B. N.
Effective methods of care for sunflower crops [Текст] / B. N. Nasiyev // Доклады национальной академии наук Республики Казахстан. - 2021. - №1. - Р. 61-66
ББК 42.14
Рубрики: Масличные, эфиромасличные, лекарственные и инсектицидные растения
Кл.слова (ненормированные):
подсолнечник -- сорные растения -- культивация -- гербициды -- урожайность -- масличность
Аннотация: Возделывание подсолнечника актуально в климатических условиях Западного Казахстана, характеризующихся высокой теплообеспеченностью и продолжительным вегетационным периодом. Для получения высокого урожая подсолнечника в системе адаптивных технологий важное значение имеет правильная предпосевная подготовка почвы и оптимальные сроки посева. Большой урон урожаю подсолнечника наносят сорные растения. Обладая мощной подземной и надземной массой, подсолнечник конкурирует с сорняками лучше многих других полевых культур. Тем не менее, на засоренных полях его урожайность, по данным ВНИИМК, снижается на 2,5 ц/га [48, 49, 50]. Как показали данные учета, в наших исследованиях 2018-2020 годов наибольшая засоренность посевов подсолнечника была на вариантах без применения гербицидов. Так, в среднем за 3 года в фазу 2-х настоящих листьев при применении технологии боронование + предпосевная культивация (контроль) на 1 м2 насчитывался 10,67 сорных растений с сырой массой 31,22 г/м2. Как показали данные исследований, в среднем за 2018-2020 годы наиболее высокий сбор масла установлен на варианте боронование + предпосевная культивация с внесением Раундап (2 л/га) – 9,57 ц/га. При применении 1 и 2-х междурядных обработок, совмещенных боронованием и предпосевной культивацией, сбор масла вырос до 7,16-7,95 ц/га, что больше по сравнению с контролем на 0,92-1,71 ц/га.
Держатели документа:
ЗКУ
N24
Nasiyev, B. N.
Effective methods of care for sunflower crops [Текст] / B. N. Nasiyev // Доклады национальной академии наук Республики Казахстан. - 2021. - №1. - Р. 61-66
Рубрики: Масличные, эфиромасличные, лекарственные и инсектицидные растения
Кл.слова (ненормированные):
подсолнечник -- сорные растения -- культивация -- гербициды -- урожайность -- масличность
Аннотация: Возделывание подсолнечника актуально в климатических условиях Западного Казахстана, характеризующихся высокой теплообеспеченностью и продолжительным вегетационным периодом. Для получения высокого урожая подсолнечника в системе адаптивных технологий важное значение имеет правильная предпосевная подготовка почвы и оптимальные сроки посева. Большой урон урожаю подсолнечника наносят сорные растения. Обладая мощной подземной и надземной массой, подсолнечник конкурирует с сорняками лучше многих других полевых культур. Тем не менее, на засоренных полях его урожайность, по данным ВНИИМК, снижается на 2,5 ц/га [48, 49, 50]. Как показали данные учета, в наших исследованиях 2018-2020 годов наибольшая засоренность посевов подсолнечника была на вариантах без применения гербицидов. Так, в среднем за 3 года в фазу 2-х настоящих листьев при применении технологии боронование + предпосевная культивация (контроль) на 1 м2 насчитывался 10,67 сорных растений с сырой массой 31,22 г/м2. Как показали данные исследований, в среднем за 2018-2020 годы наиболее высокий сбор масла установлен на варианте боронование + предпосевная культивация с внесением Раундап (2 л/га) – 9,57 ц/га. При применении 1 и 2-х междурядных обработок, совмещенных боронованием и предпосевной культивацией, сбор масла вырос до 7,16-7,95 ц/га, что больше по сравнению с контролем на 0,92-1,71 ц/га.
Держатели документа:
ЗКУ
49.
Подробнее
35
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
ББК 35
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
D99
Dzhumadullaeva, S. A.
The kinetics of selective hydrazinolysis of maleic acid on the acid catalyst. [Текст] / S. A. Dzhumadullaeva, A. B. Bayeshov, A. V. Kolesnikov // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 53-57
Рубрики: chemical Technology
Кл.слова (ненормированные):
maleic acid -- hydrazinolysis -- hydrazide -- catalyst
Аннотация: For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant (k) was calculated from the second-order reaction rate equation. The effect of initial concentrations of maleic acid and hydrazine hydrate, the temperature on the reaction rate was studied. The first order of maleic acid and hydrazine hydrate is determined. Activation energy of the process found from the Arrhenius dependence is 32,1 kJ/mol. On the basis of kinetic and IR spectroscopic methods, a probable reaction mechanism involving polymer-bound hydrogen ions is proposed.
Держатели документа:
WKU
Доп.точки доступа:
Bayeshov, A.B.
Kolesnikov, A.V.
50.
Подробнее
24
A67
Appazov, N. O.
Rice straw and husk oil sludge for processing through the use of lignosulfonate as a binder with activarted charcoal. [Текст] / N. O. Appazov, B. M. Diyarova, B. M. Bazarbayev, T. Assylbekkyzy [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 65-71
ББК 24
Рубрики: chemistry
Кл.слова (ненормированные):
activated carbon -- rice husk -- rice straw -- oil sludge -- lignosulfonate -- carbonization -- activation -- briquettes
Аннотация: This article examines the effect of lignosulfonate binding of rice waste to oil waste to obtain activated carbon. Lignosulfonate was added to the mixture to produce briquetted activated carbon by processing rice residue (husk and straw) and oil sludge together.
Держатели документа:
WKU
Доп.точки доступа:
Diyarova, B. M.
Bazarbayev, B. M.
Assylbekkyzy, T.
Kanzhar, S. A.
Dzhiembaev , B. Zh.
A67
Appazov, N. O.
Rice straw and husk oil sludge for processing through the use of lignosulfonate as a binder with activarted charcoal. [Текст] / N. O. Appazov, B. M. Diyarova, B. M. Bazarbayev, T. Assylbekkyzy [et al.] // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 65-71
Рубрики: chemistry
Кл.слова (ненормированные):
activated carbon -- rice husk -- rice straw -- oil sludge -- lignosulfonate -- carbonization -- activation -- briquettes
Аннотация: This article examines the effect of lignosulfonate binding of rice waste to oil waste to obtain activated carbon. Lignosulfonate was added to the mixture to produce briquetted activated carbon by processing rice residue (husk and straw) and oil sludge together.
Держатели документа:
WKU
Доп.точки доступа:
Diyarova, B. M.
Bazarbayev, B. M.
Assylbekkyzy, T.
Kanzhar, S. A.
Dzhiembaev , B. Zh.
Страница 5, Результатов: 73