Eurasian Journal of Physics and Functional Materials最新文献_第5页

Flexible algorithms for background suppression in heavy ion induced nuclear reactions 重离子诱导核反应中背景抑制的灵活算法

Eurasian Journal of Physics and Functional Materials Pub Date : 2022-03-24 DOI: 10.32523/ejpfm.2022060102

D. Ibadullayev, Y. Tsyganov, A. Polyakov, A. Voinov, V. Subbotin, M. V. Shumeiko, L. Schlattauer

引用次数: 5

Fusion cross section and total kinetic energy of fission fragments by the dynamical dissipative surface-friction model 用动力耗散表面摩擦模型研究裂变碎片的聚变截面和总动能

Eurasian Journal of Physics and Functional Materials Pub Date : 2022-03-24 DOI: 10.32523/ejpfm.2022060101

S. Amano, Y. Aritomo, M. Ohta

引用次数: 0

Synthesis, X-ray phase analysis and differential thermal analysis of nanocrystalline superionic KxCu1.85S (x<0.05) copper sulfides 超离子KxCu1.85S (x<0.05)硫化铜纳米晶的合成、x射线物相分析及差热分析

Eurasian Journal of Physics and Functional Materials Pub Date : 2022-03-24 DOI: 10.32523/ejpfm.2022060107

S. Sakhabayeva, M. Balapanov, K. Kuterbekov, R. Ishembetov, M. Kubenova, Sh.G. Giniyatova, S. Nurkenov, B. Akhmetgaliev, M. Zeleev, R. Yakshibaev, G. S. Seisenbayeva

引用次数: 1

Non-destructive neutron structural studies of ancient ceramic fragments of the cultural heritage of the Republic of Kazakhstan 哈萨克斯坦共和国文化遗产古代陶瓷碎片的非破坏性中子结构研究

Eurasian Journal of Physics and Functional Materials Pub Date : 2022-03-24 DOI: 10.32523/ejpfm.2022060106

B. Bakirov, A. Z. Zhomartova, S. Kichanov, R. Zhumatayev, A. Toleubayev, K. Nazarov, D. Kozlenko, A. M. Nazarova

引用次数: 1

Cyclotron mass of an electron in strong magnetic fields in a wide InAs quantum well 宽InAs量子阱中强磁场中电子的回旋质量

Eurasian Journal of Physics and Functional Materials Pub Date : 2022-03-23 DOI: 10.32523/ejpfm.2022060103

B. Abdulazizov

引用次数: 2

Magnetic anisotropy and stability of Fe3Ga compounds Fe3Ga化合物的磁各向异性和稳定性

Eurasian Journal of Physics and Functional Materials Pub Date : 2021-12-10 DOI: 10.32523/ejpfm.2021050407

T. Inerbaev, A. Abuova, A. Dauletbekova, F. Abuova, G. Kaptagay, Zh. Zakieva, M. Eltizarova, A. Barakov

引用次数: 0

The features of deformation-stimulated RbI luminescence 变形激发RbI发光的特点

Eurasian Journal of Physics and Functional Materials Pub Date : 2021-12-10 DOI: 10.32523/ejpfm.2021050406

L. Myasnikova, A. Maratova, K. Shunkeyev

{"title":"The features of deformation-stimulated RbI luminescence","authors":"L. Myasnikova, A. Maratova, K. Shunkeyev","doi":"10.32523/ejpfm.2021050406","DOIUrl":"https://doi.org/10.32523/ejpfm.2021050406","url":null,"abstract":"This paper studies deformation-stimulated features of radiative relaxation of self-trapped excitons and recombination assembly of exciton-like luminescence in RbI crystal. Methods of research were luminescence and thermal activation spectroscopy. The identity of the mechanism of manifestation of the X-ray luminescence, tunnel luminescence and thermally stimulated luminescence spectra were found in the elastically deformed RbI crystal, interpreted by the luminescence of self-trapped exciton, tunnel recharge of F′, VK -pairs and thermally stimulated recombination of e−, VK -centres, respectively.The temperatures of the maximum destruction peaks of thermally stimulated luminescence, their spectral composition and activation energies were determined experimentally, on the basis of which the mechanisms of recombination assembly of exciton-like luminescences in a RbI crystal were interpreted. Uniaxial elastic deformation leads to the effective formation of point radiation defects ( F′, HA, VK -centers) in comparison with an unbroken lattice, where the predominant mechanism is the association of interstitial atoms ( H -centres) with the formation of I3−-centres.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45434495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation and diagnostics of plasma flows in a pulsed plasma accelerator for experimental modelling of processes in tokamaks 用于托卡马克过程实验模拟的脉冲等离子体加速器中等离子体流动的研究和诊断

Eurasian Journal of Physics and Functional Materials Pub Date : 2021-12-10 DOI: 10.32523/ejpfm.2021050404

M. Dosbolayev, A. Tazhen, T. Ramazanov

{"title":"Investigation and diagnostics of plasma flows in a pulsed plasma accelerator for experimental modelling of processes in tokamaks","authors":"M. Dosbolayev, A. Tazhen, T. Ramazanov","doi":"10.32523/ejpfm.2021050404","DOIUrl":"https://doi.org/10.32523/ejpfm.2021050404","url":null,"abstract":"This paper presents the experimental results on electron, ion temperatures and densities in a pulsed plasma accelerator. The values of electron densities and temperatures were computed using the methods of relative intensities of Hα and Hβ lines, Hβ Stark broadening, and the technique is based on Faraday cup beam current measurements. In this work, a linear optical spectrometer S-100 was used to acquire the emission spectra of hydrogen and air plasmas. In this spectrum, there are some lines due to Fe, Cu, N2, O2, and H2. The series of visible lines in the hydrogen atom spectrum are named the Balmer series. The spectral emissions of iron and copper occur throughout the gas breakdown and ignition of an arc discharge, during the erosion and sputtering of materials. The vacuum chamber and coaxial electrodes were made. The electron temperatures and densities in a pulsed plasma accelerator, measured via relative intensities of spectral lines and Stark broadening, at a charging voltage of a capacitor bank of 3 kV and a working gas pressure in a vacuum chamber of 40 mTorr, were 2.6 eV and 1.66 · 1016 cm−3 for hydrogen plasma. These results were compared with the Faraday cup beam current measurements. However, no match was found. Considering and analyzing this distinction, we concluded that the spectral method of plasma diagnostics provides more accurate results than electrical measurement. The theory of probe measurements can give approximate results in a moving plasma.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41624392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Analysis of the beryllium stability under standard and critical operation in a fusion reactor 核聚变反应堆标准和临界运行下铍的稳定性分析

Eurasian Journal of Physics and Functional Materials Pub Date : 2021-12-10 DOI: 10.32523/ejpfm.2021050408

K. Bekbayev, M. Akim, Zh. Nabiyeva

{"title":"Analysis of the beryllium stability under standard and critical operation in a fusion reactor","authors":"K. Bekbayev, M. Akim, Zh. Nabiyeva","doi":"10.32523/ejpfm.2021050408","DOIUrl":"https://doi.org/10.32523/ejpfm.2021050408","url":null,"abstract":"Currently, dark fermentation is the most practically applicable for the implementation of biotechnological roduction of hydrogen. However, this process has certain limiting factors, since a significant part of the substrates are converted into various metabolic products, but not into H2 . Therefore, it is necessary to develop optimal conditions for energy recovery in the form of gaseous molecular hydrogen. Various carbohydrate-containing raw materials for hydrogen production often require pretreatment before they can be used by microorganisms. Dilute acid pretreatment represents a promising way to increase biohydrogen production. However, during acid hydrolysis of carbohydrate-containing wastes, in addition to the released soluble sugars, inhibitors of enzymatic processing, such as furfural and 5-HMF, acetic and propionic acids, etc., can accumulate. In this regard, it is necessary to select the optimal conditions for the efficient production of biohydrogen. This study investigated the production of biohydrogen during the microbial fermentation of sugars in a dilute solution of a molasses-based acid hydrolyzate using Escherichia coli and a multiple mutant. The results of the experiments showed that molasses is a valuable product as a source of carbon and energy for microorganisms in the production of biohydrogen, as well as for the production of biomass for the further production of various products with high added value.","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47517041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of parameters for the production of biomass and biohydrogen from brewer’s grain 啤酒糟生产生物质和生物氢的参数开发

Eurasian Journal of Physics and Functional Materials Pub Date : 2021-12-10 DOI: 10.32523/ejpfm.2021050405

A. Toleugazykyzy, D. Tlevlessova, A. Samadun, R. Bekbayeva

{"title":"Development of parameters for the production of biomass and biohydrogen from brewer’s grain","authors":"A. Toleugazykyzy, D. Tlevlessova, A. Samadun, R. Bekbayeva","doi":"10.32523/ejpfm.2021050405","DOIUrl":"https://doi.org/10.32523/ejpfm.2021050405","url":null,"abstract":"In this work, suitable pretreatment conditions have been studied to increase hydrogen production by dark fermentation of brewer’s grain (BG). All samples with different concentrations of raw materials were tested: treatment with sulfuric acid with a concentration of 1.5%, autoclaving at 121 ◦C, purification from impurities by filtration, centrifugation and calibration of the pH of the medium to 7.5 units. The choice of acid hydrolysis is due to the fact that this type of pretreatment is the most suitable for the further commercialization of this technology. Also, pretreatment performs the task of suppressing methanogens and creating conditions for the life of hydrogen-producing bacteria. Experiments were carried out under mesophilic conditions ( 37 ◦C) using wild-type and multiple mutant E. coli. The highest sugar yields were obtained at a 4% concentration of brewer’s grains and in the presence of a concentration of 1.5% sulfuric acid in the original substrate. The results of the experiments showed that brewer’s grains are a valuable product as a source of carbon and energy for microorganisms in the production of biohydrogen, as well as for the production of biomass for further production of value-added products. ","PeriodicalId":36047,"journal":{"name":"Eurasian Journal of Physics and Functional Materials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42612226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0