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An advanced theoretical approach to study super-multiperiod superlattices:theory vs experiments

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Journal of Semiconductors 2024年第2期45卷 57-66页

作者： Alexander Sergeevich Dashkov Semyon Andreevich Khakhulin Dmitrii Alekseevich Shapran Gennadii Fedorovich Glinskii Nikita Andreevich Kostromin Alexander Leonidovich Vasiliev sergey Nikolayevich Yakunin Oleg Sergeevich Komkov Evgeniy Viktorovich Pirogov Maxim Sergeevich Sobolev Leonid Ivanovich Goray Alexei Dmitrievich Bouravleuv Saint-Petersburg Electrotechnical University"LETI" Saint Petersburg197022Russian Federation Alferov Saint-Petersburg National Research Academic University of the Russian Academy of Sciences Saint Petersburg194021RussiaFne deration Saint Petersburg Polytechnic University of Peter the Great Saint Petersburg195251Russian Federation Shubnikov Institute of Crystallography of Federal Scientific Research Centre“Crystallography and Photonics” Russian Academy of SciencesMoscow119333Russian Federation National Research Center‘Kurchatov Institute’ Moscow123182Russian Federation University associated with IA EAEC Saint Petersburg194044Russian Federation Institute for Analytical Instrumentation Saint Petersburg198095Russian Federation Ioffe Institute Saint Petersburg194021Russian Federation

A new theoretical method to study super-multiperiod superlattices has been *** method combines the precision of the 8-band kp-method with the flexibility of the shooting method and the Monte Carlo *** method was applied to examine the finest quality samples of super-multiperiod Al_(0.3)Ga_(0.7)As/GaAs superlattices grown by molecular beam *** express photoreflectance spectroscopy method was utilized to validate the proposed theoretical *** the first time,the accurate theoretical analysis of the energy band diagram of super-multiperiod superlattices with experimental verification has been *** proposed approach highly accurately determines transition peak positions and enables the calculation of the energy band diagram,transition energies,relaxation rates,and gain *** has achieved a remarkably low 5%error compared to the commonly used method,which typically results in a 25%error,and allowed to recover the superlattice *** retrieved intrinsic parameters of the samples aligned with XRD data and growth *** proposed method also accurately predicted the escape of the second energy level for quantum well thicknesses less than 5 nm,as was observed in photoreflectance *** new designs of THz light-emitting devices operating at room temperature were suggested by the developed method.

关键词： super-multiperiod superlattice photoreflectance spectroscopy Kane model kp-method energy band diagram light amplifiers

Transport Across Chloroplast Membranes： Optimizing Photosynthesis for Adverse Environmental Conditions

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Molecular Plant 2016年第3期9卷 356-370页

作者： Igor Pottosin sergey Shabala Biomedicat Centre University of Colima Colima Colima 28045 Mexico School of Land and Food University of Tasmania Hobart TAS 7001 Australia

Chloroplasts are central to solar light harvesting and photosynthesis. Optimal chloroplast functioning is vitally dependent on a very intensive traffic of metabolites and ions between the cytosol and stroma, and should be attuned for adverse environmental conditions. This is achieved by an orchestrated regulation of a variety of transport systems located at chloroplast membranes such as porines, solute channels, ion-specific cation and anion channels, and various primary and secondary active transport systems. In this review we describe the molecular nature and functional properties of the inner and outer envelope and thylakoid membrane channels and transporters. We then discuss how their orchestrated regulation affects thylakoid structure, electron transport and excitation energy transfer, proton-motive force partition, ion homeostasis, stromal pH regulation, andvolume regulation. We link the activity of key cation and anion transport systems with stress-specific signaling processes in chloroplasts, and discuss how these signals interact with the signals generated in other organelles to optimize the cell performance, with a special emphasis on Ca^2＋ and reactive oxygen species signaling.

关键词： stroma thylakoid p.m.f. envelope reactive oxygen species programmed cell death

Medium chromatic dispersion spectral-domain optical calculation and correction in coherence tomography

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Frontiers of Optoelectronics 2017年第3期10卷 323-328页

作者： Vasily A. MATKIVSKY Alexander A. MOISEEV sergey yu. ksenofontov Irina V. KASATKINA Grigory V. GELIKONOV Dmitry V. SHABANOV Pavel A. SHILYAGIN Valentine M. GELIKONOV Institute of Applied Physics Russian Academy of Sciences Nizhny Novgorod 603950 Russia

A method for determining and correcting distortions in spectral-domain optical coherence tomography images caused by medium dispersion was developed. The method is based on analysis of the phase distribution of the interference signal recorded by an optical coherence tomography device using an iterative approach to find and compensate for the effect of a medium＇s chromatic dispersion on point-spread function broadening in optical coherence tomography. This enables compensation of the impact of medium dispersion to an accuracy of a fraction of a radian （units of percent） while avoiding additional measurements and solution of the optimization problem. The robustness of the method was demonstrated experimentally using model and biological objects.

关键词： optical coherence tomography (OCT) dispersion image resolution restoration

Mouse models of epithelial ovarian cancer for preclinical studies

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Zoological Research 2021年第2期42卷 153-160页

作者： sergey Karakashev Ru-Gang Zhang Immunology Microenvironment&Metastasis ProgramThe Wistar InstitutePhiladelphiaPA 19104USA

Epithelial ovarian cancer(EOC) is the leading cause of gynecological cancer-related mortality in the developed world. EOC is a heterogeneous disease represented by several histological and molecular subtypes. Therefore, exploration of relevant preclinical animal models that consider the heterogenic nature of EOC is of great importance for the development of novel therapeutic strategies that can be translated clinically to combat this devastating disease. In this review, we discuss recent progress in the development of preclinical mouse models for EOC study as well as their advantages and limitations.

关键词： Epithelial ovarian cancer Patientderived xenografts Orthotopic mouse model Subcutaneous mouse model Intraperitoneal mouse model Syngeneic mouse model Genetic engineered mouse model

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理论术语与经验术语

中国科技术语 2024年第1期26卷 23-32页

作者： С.Д.舍洛夫董红晶(译) 俄罗斯科学院俄语所术语中心俄罗斯莫斯科101000 哈尔滨师范大学斯拉夫语学院黑龙江哈尔滨150025

文章旨在从语言学角度对比理论术语和经验术语,揭示术语集中理论术语和经验术语的特征。理论性是一种层级属性,术语具有一定的理论性,哪怕是理论性程度最低的术语也具有理论性。经验性是指通过任意语言或非语言方式感知和习得术语,进而... 详细信息

文章旨在从语言学角度对比理论术语和经验术语,揭示术语集中理论术语和经验术语的特征。理论性是一种层级属性,术语具有一定的理论性,哪怕是理论性程度最低的术语也具有理论性。经验性是指通过任意语言或非语言方式感知和习得术语,进而理解和掌握术语的属性。上述观点适用于全部科学和各知识领域的专业词汇,包括人文科学。

关键词：理论术语经验术语术语划分俄罗斯术语学

Protective Composite Coatings Formed on Mg Alloy Surface by PEO Using Organofluorine Materials

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Journal of Materials Science & Technology 2017年第7期33卷 661-667页

作者： Dmitry V. Mashtalyar Konstantine V. Nadaraia sergey L. Sinebryukhov sergey V. Gnedenkov Institute of Chemistry Far Eastern BranchRussian Academy of SciencesVladivostok 690022Russia Far Eastern Federal University Vladivostok 690950Russia

The results of the surface modification of magnesium alloys by plasma electrolytic oxidation（PEO） and subsequent treatment in suspension of the superdispersed polytetrafluoroethylene（SPTFE） or telomeric solution of tetrafluoroethylene（TFE） are presented. Composite coatings have been obtained by dipping with subsequent heat treatment. Electrochemical, tribological properties and wettability of protective composite coatings have been investigated. Composite coatings formed on PEO-layer by fourfold treatment of samples in SPTFE suspension possess best protective properties. The obtained coatings decrease the corrosion current density（5.4 × 10^（-11） A cm^（-2）） and wear（7.6 × 10^（-7）mm^3（Nm）^（-1））, and increase the polarisation resistance（1.7 × 10~9 cm^2） and impedance modulus（1.9 × 10~9 cm^2） by orders of magnitude in comparison with unprotected magnesium alloy and base PEO-coating. The highest value of contact angle（CA） has been obtained for coatings with triple application in telomeric solution. CA for such composite coatings attains（171 ± 2）？, as the result of multimodal roughness of the composite coating＇s surface.

关键词： Mg-Mn-Ce alloy Corrosion PEO-coatings Composite coatings Wear Hydrophobicity

Forestry activity is one mechanism of invasion by arboreal plants

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Journal of Arid Land 2013年第4期5卷 434-438页

作者： Gulnara SITPAEVA sergey CHEKALIN The Institute of Botany and Phytointroduction Committee of ScienceMinistry of Education and ScienceAlmaty 050060Kazakhstan

For a long time,forestry primarily had industrial *** of wood production was the main criterion of forestry efficacy,and thus rapid-growing arboreal species were cultivated in natural *** recently,nature protection has become one of forestry＇s ***,some introduced,rapid-growing species became aggressive components of natural ecological systems during the *** this paper,we first describe a method that we developed to categorize aggressiveness of invasive arboreal plants in natural forest ecosystems of *** then apply this new scheme to monitoring data of invasive arboreal plants to provide an insight into the invasion potential of different species in the fruit forests of Southeast Kazakhstan.

关键词： forest ecosystems aggressiveness invasive arboreal plants

Use of nanoscale metals in poultry diet as a mineral feed additive

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Animal Nutrition 2020年第2期6卷 185-191页

作者： Еlena Sizova sergey Miroshnikov Svyatoslav Lebedev Boris Usha sergey Shabunin Federal Research Centre of Biological Systems and Agrotechnologies of the Russian Academy of Sciences Orenburg460000Russia Orenburg State University Orenburg460018Russia Moscow State University of Food Production Moscow125080Russia Federal State Budget Scientific Institute(All-Russian Veterinary Research Institute of Pathology Pharmacology and Therapy)Voronezh394087Russia

The research was aimed at studying the efficiency of a nanoscale alloy of copper(Cu) and zinc(Zn) to be used as a mineral additive for feeding broiler chickens,compared to inorganic and organic forms of these *** studies of the blood serum were performed using an automated *** mineral composition was determined by atomic emission and mass spectrometry(MS-ISP),The study was performed on broiler chickens of cross Smena 7(n=72) in the conditions of a *** were3 treatment groups with 24 chickens in *** the inorganic form of mineral supplements with the nanosized alloy resulted in a positive productive effect,with a tendency to increasing the content of serum *** nano scale form of metals improved(P <0.05) the activity of *** the same time,the liver micro structure of experimental groups is similar to that of the *** was a moderate plethora and poor polymorphoncellular infiltration around the interlobular triads with a clear morphological orga nization of the stromal and parenchymal co mponents of the ***,the lack of oxidative stress was confirmed by the dynamics of catalase(CT),total superoxide dismutase(TSOD) and malondialdehyde(MDA) levels,and the concentrations of which did not exceed the reference level Replacing Cu and Zn sulfates with the nanoscale alloy(group 1) and organic form(group 2) of these elements in the diet of broiler chickens was accompanied by the increasing pool of these elements in the organisms at the end of the *** was accumulated throughout the experiment in experimental group 1,compared to the reference,with the maximum difference in the liver of 36.5%(P ≤ 0.05),in the feathers 2.5 times(P ≤ 0.01).Assessment of the Zn level dynamics in the feathers revealed a well noticeable tendency to reducing its concentrations during the experiment in all *** the background of feeding a nanoscale alloy,Zn concentration in the liver exceeded th

关键词： Broiler chicken Feeding Mineral supplement Nanoscale metal

Mathematical Modeling of Heat Transfer Processes of Coal Waste Combustion in a Chamber of Automated Energy Generating Complex

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Journal of Thermal Science 2013年第2期22卷 174-179页

作者： sergey P. Mochalov sergey N. Kalashnikov Pavel S. Mochalov Guolin Song Guoyi Tang Siberian State Industrial University Advanced Materials Institute Graduate School at ShenzhenTsinghua University

The automated energy generating complex allows obtaining heat energy from waste coal-water slurry fuel （WCF） that is a mixture of fine coal particles from coal enrichment wastes with water. The mixture is blown into the swirl chamber under the pressure through the special sprayers. The received heat energy is used in different ways. One of the important issues is to estimate the heat losses through the walls of this chamber. In this paper we solved the boundary problem of mathematical physics to estimate the temperature fields in the walls of the swirl chamber. The obtained solution allows us to estimate the heat losses through the waUs of the swid chamber. The task of the mathematical physics has been solved by a numerical finite-difference method. The method for solving this prob- lem can be used in the calculation of temperature fields and evaluation of heat losses in other thermal power units.

关键词： heat transfer heat conduction equation boundary conditions the heat transfer coefficient tempera-ture distribution.