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Pseudogamous Apomixis in Maize and Sorghum in Diploid-Tetraploid Crosses

Phyton-International Journal of Experimental Botany 2019年第4期88卷 389-401页

作者： Marina Tsvetova Lev Elkonin yulia italianskaya Agricultural Research Institute of South-East Region Department of BiotechnologySaratov410010Russia

Apomictic seed development is a complex process including formation of unreduced embryo sac,parthenogenetic embryo development from the egg cell,and endosperm formation either autonomously,or due to fertilization of polar nuclei by the sperm(under pseudogamous form of apomixis).In the latter case,an obstacle to the normal endosperm development is disturbance of maternal(m)-to-paternal(p)genomic ratio 2m:1p that occurs in the cases of pollination of unreduced embryo sac with haploid *** of tetraploid pollinators can overcome this problem because in such crosses maternal-to-paternal genomic ratio is 4m:2p that provides formation of kernels with plump *** tetraploid lines as pollen parents we observed formation of plump kernels on the ears and panicles of diploid maize and sorghum *** kernels had hybrid endosperm and diploid maternal-type embryo or hybrid embryo with different ploidy level(2n,3n,4n).The frequencies of plump kernels on the ear ranged from 0.2-0.3%to 5.7-6.2%counting from the number of ***-type plants were found in two maize lines,their frequency varying from 10.7 to 37.5%of the progeny *** CMS-lines of sorghum pollinated with tetraploid sorghum accessions,the frequency of plump kernels ranged from 0.6 to 14.0%counting from the number of ovaries;the frequency of maternal-type plants varied from 33.0 up to 96.1%.The hybrid nature of endosperm of the kernels that gave rise to maternal-type plants has been proved by marker gene expression and by SDS-electrophoresis of endosperm *** data testify to variable modes of seed formation under diploid×tetraploid crosses in maize and sorghum both by amphi-and by ***,usage of tetraploid pollinators might be a promising approach for isolation of apomixis in maize and sorghum accessions.

关键词： Interploidy crosses genomic balance unreduced embryo sac pseudogamous apomixis Zea mays L Sorghum bicolor(L.)Moench

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Ataxia-telangiectasia mutated plays an important role in cerebellar integrity and functionality

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Neural Regeneration Research 2023年第3期18卷 497-502页

作者： yulia Mitiagin Ari Barzilai Department of Neurobiology the School of NeurobiologyBiophysicsMolecular Biology and BiochemistryGeorge S.WiseFaculty of Life SciencesTel Aviv UniversityTel AvivIsrael Sagol School of Neurosciences Tel Aviv UniversityTel AvivIsrael

Accumulating evidence indicates that ataxia-telangiectasia mutated kinase is critical for maintaining cellular homeostasis and that it has both nuclear and cytoplasmic ***,the functions of ataxia-telangiectasia mutated that when lost lead to cerebellar degeneration are still *** this review,we first describe the role of ataxia-telangiectasia mutated in cerebellar *** addition to its canonical nuclear functions in DNA damage response circuits,ataxia-telangiectasia mutated functions in various cytoplasmic and mitochondrial processes that are critically important for cellular *** discuss these functions with a focus on the role of ataxia-telangiectasia mutated in maintaining the homeostatic redox ***,we describe the unique functions of ataxia-telangiectasia mutated in various types of neuronal and glial cells including cerebellar granule neurons,astrocytes,and microglial cells.

关键词： ataxia telangiectasia ATM cerebellum DNA damage response double-strand breaks mitochondrial dysfunction oxidative stress single-strand breaks

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Combined effect of surface microgeometry and adhesion in normal and sliding contacts of elastic bodies

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Friction 2017年第3期5卷 339-350页

作者： Irina GORYACHEVA yulia MAKHOVSKAYA Institute for Problems in Mechanics of the Russian Academy of Sciences Pr.Vernadskogo 101-1 Moscow 119526 Russia

In this study,models are proposed to analyze the combined effect of surface microgeometry and adhesion on the load-distance dependence and energy dissipation in an approach-separation cycle,as well as on the formation and rupture of adhesive bridges during *** models are based on the Maugis-Dugdale approximation in normal and frictional (sliding and rolling) contacts of elastic bodies with regular surface *** the normal adhesive contact of surfaces with regular relief,an analytical solution,which takes into account the mutual effect of asperities,is *** contribution of adhesive hysteresis into the sliding and rolling friction forces is calculated for various values of nominal pressure,parameters of microgeometry,and adhesion.

关键词： adhesion roughness discrete contact rolling friction sliding friction

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Mathematical modeling of building structures and nonlinear differential equations

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International Journal of Modeling, Simulation, and Scientific Computing 2020年第3期11卷 154-160页

作者： Victor Orlov yulia Zheglova Moscow State University of Civil Engineering Yaroslavskoye Shosse 26 Moscow 129337Russia

Nonlinear differential equations with moving singular points require emergence and development of new approximate methods of *** this paper,we give a solution to one of the problems of the analytical approximate method for solving nonlinear differential equations with moving singular points,and study the influence of the perturbation of the initial conditions on the analytical approximate solution in the analytic *** material was tested using a numerical experiment confirming its *** theoretical material presented in this paper allows researchers to use nonlinear differential equations with moving singular points when designing mathematical models of building structures.

关键词： Mathematical modeling moving singular points a priori estimate approximate solution a posteriori error estimate

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Explosive-Emission Plasma Dynamics in Ion Diode in Double-Pulse Mode

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Plasma Science and Technology 2011年第6期13卷 698-701页

作者： Alexander I.PUSHKAREV yulia I.ISAKOVA Tomsk Polytechnic University

The results of an experimental investigation of explosive-emission plasma dynamics in an ion diode with self-magnetic insulation are presented. The investigations were accomplished at the TEMP-4M accelerator set in a mode of double pulse formation. Plasma behaviour in the anode-cathode gap was analyzed according to both the current-voltage characteristics of the diode （time resolution of 0.5 ns） and thermal imprints on a target （spatial resolution of 0.8 mm）. It was shown that when plasma formation at the potential electrode was complete, and up until the second （positive） pulse, the explosive-emission plasma expanded across the anode-cathode gap with a speed of 1.3±0.2 cm/μs. After the voltage polarity at the potential electrode was reversed （second pulse）, the plasma erosion in the anode-cathode gap （similar to the effect of a plasma opening switch） occurred. During the generation of an ion beam the size of the anode-cathode gap spacing was determined by the thickness of the plasma layer on the potential electrode and the layer thickness of the electrons drifting along the grounded electrode.

关键词： ion beams graphite cathodes plasma speed self-magnetic insulation

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The Behavior of a Gas Bubble in a Square Cavity Filled with a Viscous LiquidUndergoing Vibrations

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Fluid Dynamics & Materials Processing 2024年第11期20卷 2417-2429页

作者： Tatyana Lyubimova yulia Garicheva Andrey Ivantsov Computational Fluid Dynamics Lab Institute of Continuous Media MechanicsUral Branch of the Russian Academy of SciencesPerm614013Russia Theoretical Physics Department Perm State UniversityPerm614990Russia

External vibrations are known to be one of the promising ways to control the behavior of multiphase systems. Thecomputational modeling of the behavior of a gas bubble in a viscous liquid in a horizontal cylinder of squarecross-section, which undergoes linearly polarized translational oscillations in weightless conditions, has been carried out. Under vibrations, the bubble moves towards the wall of the vessel with acceleration determined by theamplitudes and frequency of vibrations. Near the wall, at a distance of the order of the thickness of the viscousStokes boundary layer, the effects of viscosity become more important and, as a result, the bubble is repelled fromthe wall. After some oscillations, equilibrium conditions are attained where the attractive force balances the repulsive force;accordingly, the average position of the bubble ceases to change. The numerical modelling shows thatthe average behaviors of a deformable bubble near a wall under normal and tangential vibration are similar.

关键词： Bubble vibrations viscosity average force

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Floor-Ladder Framework for Face Beautification based on Neural Network and Marquardt Mask

Floor-Ladder Framework for Face Beautification based on Neur...

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作者： yulia Novskaya 上海交通大学

学位级别：硕士

Recently,the field of image and video processing has been interesting for *** beautification is the technique,which has been applied to process digital human *** person is selfish by nature,especially when it comes to *** always want to adjust the picture,taken by themselves,specifically as a self-portrait and are curious about the useful *** image processing is one of the challenging tasks of computer vision field and understanding human face on the image is the task which this field can easily *** recognized face on the image may be modified,beautified,decomposed and warped with the aid of extremely good techniques,to collect necessities for ***,studying face beautification techniques and developing different user-orientated editing frameworks,have a tremendous *** purpose of this thesis is aimed at the studies of image deformation strategies in terms of face ***,researchers proposed many effective digital face manipulating ***,with a huge existence of programs,developing new high-tech digital cameras,with a fast development of the social networks,there has been an outstanding effect on the processing of human faces in *** based on the previous studies in psychology area,it is far determinate that more youthful faces obtain more ***,face beautification technique can be divided into fundamental issues: face shape and face texture *** approaches mean to apply the strategies one after the *** thesis makes a peculiarity of face beautification approach based on the proposed technique of manipulating face shape and face texture collectively with newly proposed *** of all,this thesis discusses and summarizes the commonplace principles of face attractiveness with regards to face shape and face beautification *** the processing of face shape,primarily based on extracting face landmark point

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Synthesis of ferromagnetic La1-xSrxMnO3 nanoparticles by precipitation from diethylene glycol solution and their properties

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Journal of Advanced Ceramics 2016年第3期5卷 197-203页

作者： yulia SHLAPA Sergii SOLOPAN Oleksandr YELENICH Volodymyr TRACHEVSKII Anatolii BELOUS V.I.Vernadsky Institute of General and Inorganic Chemistry NAS of Ukraine32/34 Palladina Avenue 03680 Kyiv 142 Ukraine Technical Center NAS of Ukraine

La1−x Sr x MnO3 nanoparticles were synthesized by precipitation from diethylene glycol solution. Features of synthesis were studied using 1Н, 13С, 139La... 详细信息

La1−x Sr x MnO3 nanoparticles were synthesized by precipitation from diethylene glycol solution. Features of synthesis were studied using 1Н, 13С, 139La nuclear magnetic resonance (NMR) investigations. The obtained results showed that the complexation reaction between diethylene glycol and metal cations takes place during the synthesis. These complexes decomposed at 200 °C and an amorphous precursor (La,Sr)MnO3 was formed. According to X-ray results, the crystallization of the perovskite structure began at 600 °C and finished at 800 °C. Microstructural studies showed that obtained nanoparticles are weakly agglomerated and have small sizes. Based on these nanoparticles, magnetic fluid was prepared which was effectively heated under an alternating magnetic field.

关键词： manganite perovskite precipitation complexation reaction diethylene glycol nuclear magnetic resonance (NMR)

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Machine Learning Application for Prediction of Sapphire Crystals Defects

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Journal of Electronic Science and Technology 2020年第1期18卷 1-9页

作者： yulia Vladimirovna Klunnikova Maxim Vladimirovich Anikeev Alexey Vladimirovich Filimonov Ravi Kumar Institute of Nanotechnology Electronics and Engineering EquipmentSouthern Federal UniversityTaganrog 347928 Institute of Computer Technology and Information Security Southern Federal UniversityTaganrog347928 Department of Physical Electronics Peter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251 the Department of Metallurgical and Materials Engineering Indian Institute of Technology MadrasChennai600036

We investigate the impact of different numbers of positive and negative examples on machine learning for sapphire crystals defects prediction. We obtain the models of crystal growth parameters influence on the sapphire crystal growth. For example, these models allow predicting the defects that occur due to local overcooling of crucible walls in the thermal node leading to the accelerated crystal growth. We also develop the prediction models for obtaining the crystal weight, blocks, cracks, bubbles formation, and total defect characteristics. The models were trained on all data sets and later tested for generalization on testing sets, which did not overlap the training *** training and testing, we find the recall and precision of prediction, and analyze the correlation among the features. The results have shown that the precision of the neural network method for predicting defects formed by local overcooling of the crucible reached 0.94.

关键词： Defects machine learning sapphire crystals

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Thermoelectric performance enhancement of(BiS)1.2(TiS2)2 misfit layer sulfide by chromium doping

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Journal of Advanced Ceramics 2013年第1期2卷 42-48页

作者： yulia Eka PUTRI Chunlei WAN Ruizhi ZHANG Takao MORI Kunihito KOUMOTO Graduate School of Engineering Nagoya UniversityNagoya 464-8603Japan CREST Japan Science and Technology AgencyTokyo 102-0075Japan Department of Physics State Key Laboratory of Photoelectric Technology and Functional Materials(Culture Base)Northwest UniversityXi’an 710069China National Institute for Materials Science(NIMS) Tsukuba 305-0044Japan

A misfit layer sulfide(BiS)_(1.2)(TiS_(2))_(2) with a natural superlattice structure has been shown to be a promising thermoelectric material,but its high carrier concentration should be reduced so as to further optimize the thermoelectric ***,ordinary acceptor doping has not succeeded because of the non-parabolic band *** this paper,we have successfully doped chromium ions into the Ti sites,which can maintain or even enhance the high effective mass of electrons so as to effectively improve ZT value.X-ray diffraction analysis,coupled with X-ray photoelectron spectroscopy,shows that chromium has been substituted into titanium sites in TiS2 layers and confirms its ionic *** chromium doping has successfully reduced the carrier concentration with the subsequent reduction of electrical *** other acceptor dopants(alkaline earth metals),chromium also enhances Seebeck coefficient and the effective mass,which can possibly be attributed to the formation of additional resonant states near Fermi *** the power factor does not improve,the significant reduction in the electronic part of the thermal conductivity leads to a measurable improvement in ZT.

关键词： thermoelectric misfit layer sulfide spark plasma sintering electrical conductivity thermal conductivity

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