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Segmental closure of the Mongol-Okhotsk Ocean:Insight from detrital geochronology in the East Transbaikalia Basin

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Geoscience Frontiers 2022年第1期13卷 15-27页

作者： Anastasia V.Arzhannikova Elena I.Demonterova Marc Jolivet Ekaterina A.Mikheeva alexei V.Ivanov Sergey G.Arzhannikov Valentin B.Khubanov Vadim S.Kamenetsky Institute of the Earth’s Crust Russian Academy of SciencesSiberian BranchIrkutskRussia Laboratoire Géosciences Rennes CNRS-UMR6118Universitéde RennesRennesFrance Geological Institute Russian Academy of SciencesSiberian BranchUlan-UdeRussia

The Late Paleozoic–Early Mesozoic Mongol-Okhotsk Ocean extended between the Siberian and Amur–North China *** timing and modalities of the oceanic closure are widely *** is largely accepted that the ocean closed in a scissor-like manner from southwest to northeast(in modern coordinates),though the timing of this process remains *** studies have shown that both western(West Transbaikalia)and eastern(Dzhagda)parts of the ocean closed almost simultaneously at the Early–Middle Jurassic ***,little information on the key central part of the oceanic suture zone is *** performed U-Pb(LA-ICP-MS)dating of detrital zircon from wellcharacterized stratigraphic sections of the central part of the Mongol-Okhotsk suture *** include the initial marine and final continental sequences of the East Transbaikalia Basin,deposited on the northern Argun-Idemeg terrane *** provide new stratigraphic ages for the marine and continental *** revised chronostratigraphy allows assigning an age of~165–155 Ma,to the collisionrelated flexure of the northern Argun-Idemeg terrane and the development of a peripheral foreland *** collisional process took place 5 to10 million years later than in the western and eastern parts of the *** demonstrate that the northern Argun-Idemeg terrane was the last block to collide with the Siberian continent,challenging the widely supported scissor-like model of closure of the MongolOkhotsk *** segments of the ocean closed independently,depending on the initial shape of the paleo continental margins.

关键词： Detrital zircon U-Pb geochronology Mongol-Okhotsk collision East Transbaikalian Basin

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Distribution of 137Cs in Tundra Soils（Kola Peninsula）

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地学前缘 2009年第S1期 235-235页

作者： Natalia Kuzmenkova alexei Miroshnikov IGEM RAS Staromonetny per.

The scope of the paper is the current radioecological situation on the North-West of Kola Peninsula. Activity of existing enterprises in the region increases the potential danger of radioactive contamination. The aim of the study is to determine the degree of influence on the environment by investigation of spatial distribution of137Cs in the soil

关键词： 137Cs soil lichens migration tundra geochemical landscapes

Distribution of ^(137)Cs in Tundra Soils(Kola Peninsula)

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地学前缘 2009年第S1期16卷 235-235页

作者： Natalia Kuzmenkova alexei Miroshnikov IGEM RAS Staromonetny per.

关键词： 137Cs soil lichens migration tundra geochemical landscapes

Electronic structure and spatial inhomogeneity of iron-based superconductor FeS

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Chinese Physics B 2020年第4期29卷 110-115页

作者： Chengwei Wang Meixiao Wang Juan Jiang Haifeng Yang Lexian Yang Wujun Shi Xiaofang Lai Sung-Kwan Mo alexei Barinov Binghai Yan Zhi Liu Fuqiang Huang Jinfeng Jia Zhongkai Liu Yulin Chen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China School of Physical Science and Technology ShanghaiTech UniversityCAS-Shanghai Science Research CenterShanghai 200031China University of Chinese Academic of Sciences Beijing 100049China Advanced Light Source Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA State Key Laboratory of Low Dimensional Quantum Physics Department of Physics and Collaborative Innovation Center for Quantum MatterTsinghua UniversityBeijing 100084China Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Elettra-Sincrotrone Trieste ScPA TriesteBasovizza 34149Italy Max Planck Institute for Chemical Physics of Solids D-01187 DresdenGermany State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Department of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Physics Department Oxford UniversityOxfordOX13PUUK

Iron-based superconductor family FeX(X=S,Se,Te)has been one of the research foci in physics and material science due to their record-breaking superconducting temperature(FeSe film)and rich physical ***,FeS,the least studied Fe X compound(due to the difficulty in synthesizing high quality macroscopic crystals)attracted much attention because of its puzzling superconducting pairing *** this work,combining scanning tunneling microscopy and angle resolved photoemission spectroscopy(ARPES)with sub-micron spatial resolution,we investigate the intrinsic electronic structures of superconducting FeS from individual single crystalline *** FeTe or FeSe,FeS remains identical tetragonal structure from room temperature down to 5 K,and the band structures observed can be well reproduced by our ab-initio ***,mixed with the 1×1 tetragonal metallic phase,we also observe the coexistence of √5×√5 reconstructed insulating phase in the crystal,which not only helps explain the unusual properties of FeS,but also demonstrates the importance of using spatially resolved experimental tools in the study of this compound.

关键词： angle-resolved photoemission with spatially resolution scanning tunneling microscopy iron-based superconductor electronic band structure

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Laser-induced hierarchical carbon patterns on polyimide substrates for flexible urea sensors

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npj Flexible Electronics 2019年第1期3卷 31-41页

作者： Emil R.Mamleyev Stefan Heissler alexei Nefedov Peter G.Weidler Nurdiana Nordin Vladislav V.Kudryashov Kerstin Länge Neil MacKinnon Swati Sharma Institute of Microstructure Technology Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Institute of Functional Interfaces Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Institute of Nuclear Physics Ibragimova St.1050032 AlmatyKazakhstan

Thermochemical decomposition of organic materials under heat-treatment in the absence of oxygen,known as the pyrolysis process,is often employed to convert micro and nano patterned polymers into carbon structures,which are subsequently used as device *** is performed at≥900℃,which entails substrate materials with a high thermal stability that excludes flexible,polymeric *** use optimized laser radiation to pattern graphitic carbon structures onto commercially available polyimide(Kapton)sheets in the micrometer to millimeter scale by inducing a localized,rapid pyrolysis,for the fabrication of flexible *** laser carbon films are electrically conductive and exhibit a high-surface area with a hierarchical porosity distribution along their *** material is obtained using various combinations of laser parameters and pyrolysis environment(oxygen-containing and inert).Extensive characterization of laser carbon is performed to understand the correlation between the material properties and laser parameters,primarily fluence and power.A photothermal carbonization mechanism based on the plume formation is ***,laser carbon is used for the fabrication of enzymatic,pH-based urea sensors using two approaches:(i)direct urease enzyme immobilization onto carbon and(ii)electrodeposition of an intermediate chitosan layer prior to urease *** flexible sensor is tested for quantitative urea detection down to 10^(−4) M concentrations,while a qualitative,color-indicative test is performed on a folded sensor placed inside a tube to demonstrate its compatibility with *** carbon is suitable for a variety of other flexible electronics and sensors,can be conveniently integrated with an external circuitry,heating elements,and with other microfabrication techniques such as fluidic platforms.

关键词： millimeter hierarchical pyrolysis

Structural position and oxidation state of nickel in SrTiO_(3)

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Journal of Advanced Dielectrics 2013年第4期3卷 43-49页

作者： Irina A.Sluchinskaya Alexander I.Lebedev alexei Erko Physics Department Moscow State University Leninskie gory119991 MoscowRussia Helmholtz-Zentrum Berlin Albert-Einstein-Str.15 12489 BerlinGermany

The properties of Ni-doped strontium titanate are studied using X-ray diffraction and XAFS *** is shown that regardless of the preparation conditions,the SrTi_(1-x)Ni_(x)O_(3) solid solution and the NiTiO_(3) phase are the most stable phases which can *** to the EXAFS data,in the single-phase sample of SrTi_(0.97)Ni_(0.03)O_(3),the Ni atoms substitute for the Ti ones and are *** distortion of the oxygen octahedra is not *** XANES spectra analysis shows that the oxidation state of nickel in NiTiO_(3) is 2+,and in the SrTi_(1-x)Ni_(x)O_(3) solid solution it is close to 4+.It is shown that the strongest light absorption in doped samples is associated with the presence of tetravalent nickel in the SrTi_(1-x)Ni_(x)O_(3) solid *** doping seems the most promising one for solar energy converters that exploit the bulk photovoltaic effect.

关键词： XAFS spectroscopy impurities strontium titanate solar energy conversion

Iron Aggravates the Depressive Phenotype of Stressed Mice by Compromising the Glymphatic System

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Neuroscience Bulletin 2020年第12期36卷 1542-1546页

作者： Shanshan Liang Yan Lu Zexiong Li Shuai Li Beina Chen Manman Zhang Binjie Chen Ming Ji Wenliang Gong Maosheng Xia alexei Verkhratsky Xu Wu Baoman Li Practical Teaching Center School of Forensic MedicineChina Medical UniversityShenyang 110122China Key Laboratory of the Ministry of Health in Congenital Malformation The Affiliated Shengjing Hospital of China Medical UniversityShenyang 110004China Department of Orthopedics The First HospitalChina Medical UniversityShenyang 110001China Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achucarro Center for Neuroscience IKERBASQUE48011 BilbaoSpain Department of Forensic Pathology School of Forensic MedicineChina Medical UniversityShenyang 110122China

Dear Editor,The pathophysiologic al mechanisms underlying mood disorders including major depressive disorder(MDD)remain to be fully *** is a key component in the development of the central nervous system and iron defi... 详细信息

关键词： impairment Iron lymphatic

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Activation of 5-HT3 receptor disrupts development of gamma oscillations in hippocampal CA1

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Activation of 5-HT3 receptor disrupts development of gamma o...

Theoretical Considerations of Laminar Flame Speed as a Function of Initial Conditions and Basic Kinetic Properties with Respect to the Safety Problem

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Kristopher YOON Ho KO alexei MOROZOV Unit on Behavioral Genetics Laboratory of Molecular PathophysiologyNIMHNIHUSA Department of Neuroscience Physiology & PharmacologyUniversity College LondonUK

5-HT3 receptor has been implicated in learning and memory *** of this receptor has been suggested to impair cognition whereas its inhibition is thought to facilitate *** oscillations are proposed to play an important role in cognition and memory;however,the role of 5-HT3 receptor in gamma oscillations remains *** gamma oscillations are driven by interplay between fast-spiking parvalbumin(PV)- positive interneurons and pyramidal cells,the roles of other interneurons are poorly understood.A subpopulation of PV-negative but cholecystokinin(CCK)-positive hippocampal interneurons expresses 5-HT3 *** we investigated how 5-HT3 receptors modulate carbachol-induced gamma oscillations through these interneurons in hippocampal area CA1.5-HT3 receptor agonist m-CPBG attenuated development of gamma *** increased afterhyperpolarization(AHP)and reduced firing frequency in 5-HT3 cells in a Ca-and small conductance potassium (SK)-channel-dependent manner,reduced inhibitory input to PV cells and increased but desynchronized PV cells’ firing,which interfered with the development of gamma *** findings provide a novel mechanism whereby 5-HT3 interneurons modulate gamma oscillations by changing inhibition of PV interneurons,which might be involved in the modulation of cognitive functions by 5-HT3 receptors.

关键词： 5-HT3 receptor gamma oscillation hippocampus PV interneurons CCK cells firing frequency accommodation

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Journal of Energy and Power Engineering 2012年第6期6卷 849-857页

作者： Jorge Yanez Mike Kuznetsov alexei Kotchourko Alexander Lelyakin Tomas Jordan Institute for Nuclear and Energy Technologies Karlsruhe Institute of Technology Karlsruhe 76131 Germany

The Zeldovich-Frank-Kamenetskii solution for the flame velocity of a planar front with one-step overall chemical reaction was enhanced. The assumption that the consumption rate depends exclusively on a chemical component was removed. Instead, the reaction rate was considered to be dependent on all reactants of an overall reaction. The new formulation was applied to obtain the activation energy and the pre-exponential factor of a set of hydrogen-air mixtures.

关键词： Laminar flame velocity activation energy explosion hydrogen safety.