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Microstructure and hydrogen storage properties of as-cast and rapidly solidified Ti-rich Ti-V alloys

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Transactions of Nonferrous Metals Society of China 2012年第8期22卷 1831-1838页

作者： Suwarno SUWARNO Jan Ketil SOLBERG Jan Petter MAEHLEN Bente KROGH Bφrre Tore BφRRESEN Esther OCHOA-FERNANDEZ Erling RYTTER Mario WILLIAMS Roman DENYS volodymyr A.yartys Department of Materials Science and Engineering Norwegian University of Science and TechnologyNO-7491TrondheimNorway Institute for Energy Technology P.O.Box 40NO-2027KjellerNorway Statoil Research Centre RotvollN-7005TrondheimNorway University of the Western Cape Private Bag X17Bellville7535South Africa

The goal of the present work was to optimize the phase-structural composition and microstructure of binary Ti0.8-0.9V0.2-0.1 alloys with respect to their hydrogen sorption properties. Application of these alloys is for hydrogen absorption from gaseous mixtures containing substantial amounts of carbon monoxide （CO） at high temperatures. Irrespective of alloy composition, both α（HCP） and β（BCC） phases in Ti0.8-0.9V0.2-0.1 formed single phase FCC hydrides upon hydrogenation in pure H2. An in situ synchrotron X-ray diffraction study showed that only the β-phase transformed to the corresponding hydride when the alloy was hydrogenated in a mixture of H2＋10%CO. Rapid solidification （RS） of the alloy resulted in refined grain sizes both in the Ti0.8V0.2 and Ti0.9V0.1 alloys. Furthermore, RS was found to increase the β-phase fraction in Ti0.9V0.1, being twice larger than that of the as-cast alloy. Ti0.9V0.1 had a platelike microstructure as observed by scanning electron microscopy （SEM）, the plates were about 300 nm thick. The microstructure refinement resulted in a faster kinetics of H desorption as observed by temperature desorption spectroscopy （TDS）.

关键词： hydrogen storage Ti-V alloys rapid solidification synchrotron X-ray diffraction carbon monoxide

LaMgNi系储氢合金相变过程中的原位中子衍射研究

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LaMgNi系储氢合金相变过程中的原位中子衍射研究

Physical Diagnostic Examinations of Cavernous Pulmonary Tuberculosis in the 19th and 21st Centuries

中国稀土学会第四届青年学术会议

作者：万初斌 volodymyr A.yartys 巨新北京科技大学数理学院挪威能源技术研究所IFE能源系统部

目前的新能源汽车以锂电作为主流,但与锂离子电池相比,镍氢电池具有价格低廉,通用性强,放电电流大,环保稳定,使用安全等优点,因此镍氢电池将是新能源汽车动力电池的重要选择之一。以储氢合金为负极材料的镍氢电池(Ni-MH)已引起了人们广... 详细信息

目前的新能源汽车以锂电作为主流,但与锂离子电池相比,镍氢电池具有价格低廉,通用性强,放电电流大,环保稳定,使用安全等优点,因此镍氢电池将是新能源汽车动力电池的重要选择之一。以储氢合金为负极材料的镍氢电池(Ni-MH)已引起了人们广泛的关注,并且已经在产业方面取得了重大的突破,目前可用于便携电子设备,电动自行车、小轿车和公交车等。镍氢电池的效率取决于负极材料,即储氢合金的吸放氢性能和电化学性能。针对第三代镍氢电池负极材料La-Mg-Ni合金体系,研究表明La-Mg-Ni体系合金具备高容量吸放氢能力和充放电能力稳定性,成为近些年国内外学者研究的焦点。研究以AB型LaY MgNi合金材料为对象,利用原位高分辨中子衍射技术,研究La-Mg-Ni合金材料在300-1273K温度范围下,组成相的结构信息和相平衡状态,获得包晶反应和温度之间的关系;研究La-Mg-Ni合金氢化物的晶体结构,确认氢原子金属原子在结构中的位置和占位等重要信息。同时结合电化学和吸放氢性能测试,开发出电池性能优异的La-Mg-Ni电池负极材料。高分辨粉末中子衍射数据Rietveld结构精修观察该材料体系在300 K到1273 K温度范围下的晶体组成相,获得了各La-Mg-Ni金属间化合物的熔点,获得相结构与温度之间的关系;研究Mg元素对相平衡和化合物的熔点的影响,Mg含量增加导致AB熔点升高,AB熔点的降低;获得了La-Y-Mg-Ni合金及其氢化物的晶体结构信息。

关键词： LaMgNi 稀土储氢合金中子衍射晶体结构电化学性能

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Infectious Diseases & Immunity 2024年第2期4卷 99-100页

作者： volodymyr Berezutskyi Department of Family Medicine of Postgraduates Faculty and Propedeutic of Internal Medicine Dnipro State Medical UniversityVernadsky AV.9Dnipro 49000Ukraine.

To the editor,Physical examination was first introduced as an effective diagnostic tool in pulmonology after the publication of the 1819 treatise“De l’Auscultation médiate”by the French physician and inventor of the stethoscope,Rene Laennec(1781–1826).Throughout the 19th century,followers of Laennec improved physical examination,making it possible to diagnose hydrothorax[pneumothorax,consolidation,or lung cavities with sizes“not less than that of a walnut.”[1]However,during the 20th and 21st centuries,physicians gradually lost interest in physical diagnoses;this is particularly true in the diagnosis of pulmonary *** tuberculosis,colloquially termed“consumption,”was an epidemic in Europe in the 19th century,when it became the most common cause of *** tuberculosis was the most common autopsy finding.[1]According to modern concepts,tuberculosis progresses from initial infection to tissue necrosis,causing pulmonary cavity formation.[2]

关键词： tuberculosis diagnosis cavity

Improving the Effectiveness of Image Classification Structural Methods by Compressing the Description According to the Information Content Criterion

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Computers, Materials & Continua 2024年第8期80卷 3085-3106页

作者： Yousef Ibrahim Daradkeh volodymyr Gorokhovatskyi Iryna Tvoroshenko Medien Zeghid Department of Computer Engineering and Information College of Engineering inWadi AlddawasirPrince Sattam bin Abdulaziz UniversityAl-Kharj16273Saudi Arabia Department of Informatics Kharkiv National University of Radio ElectronicsKharkiv61166Ukraine Electronics and Micro-Electronics Laboratory Faculty of SciencesUniversity of MonastirMonastir5000Tunisia

The research aims to improve the performance of image recognition methods based on a description in the form of a set of keypoint *** main focus is on increasing the speed of establishing the relevance of object and etalon descriptions while maintaining the required level of classification *** class to be recognized is represented by an infinite set of images obtained from the etalon by applying arbitrary geometric *** is proposed to reduce the descriptions for the etalon database by selecting the most significant descriptor components according to the information content *** informativeness of an etalon descriptor is estimated by the difference of the closest distances to its own and other *** developed method determines the relevance of the full description of the recognized object with the reduced description of the *** practical models of the classifier with different options for establishing the correspondence between object descriptors and etalons are *** results of the experimental modeling of the proposed methods for a database including images of museum jewelry are *** test sample is formed as a set of images from the etalon database and out of the database with the application of geometric transformations of scale and rotation in the field of *** practical problems of determining the threshold for the number of votes,based on which a classification decision is made,have been *** has revealed the practical possibility of tenfold reducing descriptions with full preservation of classification *** the descriptions by twenty times in the experiment leads to slightly decreased *** speed of the analysis increases in proportion to the degree of *** use of reduction by the informativeness criterion confirmed the possibility of obtaining the most significant subset of features for classification,which guarantees a decent

关键词： Description reduction description relevance descriptor image classification information content keypoint processing speed

Direct Derivation of the Neutrino Mass

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Journal of High Energy Physics, Gravitation and Cosmology 2024年第2期10卷 621-646页

作者： volodymyr Krasnoholovets Department of Theoretical Physics Institute of Physics National Academy of Sciences of Ukraine Kyiv Ukraine

In this paper, the submicroscopic deterministic concept developed by the author is applied to the problem of the neutrino mass. A particle appears from space considered as a mathematical lattice of primary topological balls, and induces a deformation coat in its surrounding. The principles of the interaction of particles with space and through space between themselves are considered in detail. The approach states that real quarks possess only an integer charge (±e) and when moving they periodically change to the monopole state (⇄g) and hence, canonical particles are dynamic dyons. A neutrino emerges as a squeezed quark when it is in a monopole state, or in other words, the quark monopole state (a bubble in the tessellattice) is transferred to the appropriate lepton monopole state (a speck in the tessellattice). The self-mass (a “rest” mass) for each neutrino flavour is calculated. The calculated value of the self-mass for the electron anti-neutrino is 1.22873978 × 10-36 kg = 0.68927247 eV/c2. The concept of neutrino oscillations is revised, and another postulation is proposed, namely, that the transition from lighter to heavier flavors is due to the inelastic scattering of neutrinos on oncoming scatterers. As a result, the neutrino captures the mass defect, becomes heavier, and therefore the transitions Ve⟶Vμ and Vμ⟶Vτ occur;thus, the number of light neutrinos decreases in the neutrino flux studied.

关键词： Charge Inerton Mass Defect Monopole Neutrino Space Tessellattice

MOF-templated tubular Ni_(1−x)Co_(x)S_(2)-CdS heterojunction with intensified direct Z-scheme charge transmission for highly promoted visible-light photocatalysis

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Nano Research 2024年第7期17卷 6281-6293页

作者： Chuan Jiang Yuanxin Qiu Xinxin Xin Yanyan Li Huilin Li Hui Wang Jixiang Xu Haifeng Lin Lei Wang volodymyr Turkevych Key Laboratory of Eco-chemical Engineering International S&T Cooperation Foundation of Eco-chemical Engineering and Green ManufactureCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization Key Laboratory of Rubber-Plastics of Ministry of EducationSchool of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China V.Bakul Institute for Superhard Materials National Academy of Sciences of UkraineKyiv 04074Ukraine

Hollow semiconductor nanostructures with direct Z-scheme heterojunction have significant advantages for photocatalytic reactions,and optimizing the interfacial charge transmission of Z-scheme heterojunction is the hinge to achieve excellent solar conversion *** this work,tubular Ni_(1−x)Co_(x)S_(2)-CdS heterostructures with reinforced Z-scheme charge transmission were constructed through an In-metal-organic framework(MOF)templated *** Z-scheme charge transfer mechanism was sufficiently confirmed by combining density functional theory(DFT)calculation,X-ray photoelectron spectroscopy(XPS),surface photovoltage spectroscopy(SPV),and radical testing ***,the use of sodium citrate complexant contributes to the formation of intimate heterointerface,and the Fermi level gap between CdS and NiS_(2)is enlarged through Co doping into NiS_(2),which enhances the built-in electric field and photo-carriers transmission driving force for Ni_(1−x)Co_(x)S_(2)-CdS heterojunction,resulting in an evidently promoted activity toward H2 evolution reaction(HER).Under visible-light(λ>400 nm)irradiation,the Ni_(1−x)Co_(x)S_(2)-CdS composite with 10 mol%Co doping and 80 wt.%CdS(NC_(0.10)S-80%CdS)achieved an outstanding HER rate up to 35.94 mmol·g^(−1)·h^(−1)(corresponding to the apparent quantum efficiency of 34.7%at 420 nm),approximately 76.4 times that of 3 wt.%Pt-loaded CdS and it is much superior to that of most CdS-based photocatalysts ever ***,the good photocatalytic durability of Ni_(1−x)Co_(x)S_(2)-CdS heterostructures was validated by cycling and long-term HER *** work could inspire the development of high-performance Z-scheme heterojunction via optimizing the morphology and interfacial charge transmission.

关键词： tubular heterostructure Z-scheme charge transmission interfacial coupling built-in electric field visible-light photocatalysis

Human chemerin induces eryptosis at concentrations exceeding circulating levels

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BIOCELL 2024年第8期48卷 1197-1208页

作者： MARYNA TKACHENKO ANATOLII ONISHCHENKO LILIYA TRYFONYUK DMYTRO BUTOV KATERYNA KOT VIKTORIIA NOVIKOVA LIWEI FAN volodymyr PROKOPIUK YURII KOT ANTON TKACHENKO Department of Internal Medicine No.2 Clinical Immunology and AllergologyKharkiv National Medical UniversityKharkiv61022Ukraine Research Institute of Experimental and Clinical Medicine Kharkiv National Medical UniversityKharkiv61022Ukraine Institute of Health National University of Water and Environmental EngineeringRivne61022Ukraine Department of Infectious Diseases and Phthisiology Kharkiv National Medical UniversityKharkiv61022Ukraine Biochemistry Department V.N.Karazin Kharkiv National University Ministry of Education and Science of UkraineKharkiv61022Ukraine Department of Chemistry BiochemistryMicrobiology and Food HygieneState Biotechnological UniversityKharkiv61022Ukraine Clinical Research Innovation Lab Floor 26 Block D Qidi Technology Building 8Tsinghua Technology ParkBeijing100084China Department of Cryobiochemistry Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of UkraineKharkiv61015Ukraine

Introduction:Human chemerin is an adipokine that regulates chemotaxis,inflammation,and glucose *** addition,accumulating evidence suggests that chemerin promotes apoptosis,autophagy,and ***,there are no data on its impact on *** current study aimed to analyze the effects of human active Glu^(21)-Ser^(157) chemerin on eryptosis in *** and Methods:Human chemerin 0-2-10-50μg/mL was incubated for 24 h with human erythrocytes(hematocrit 0.4%)obtained from eight healthy *** cytometry-based determination of phospholipid scrambling,reactive oxygen species(ROS)production,and intracellular Ca^(2+)levels was *** supplement data on ROS and Ca^(2+)signaling in chemerin-mediated eryptosis,incubation in the presence or absence of antioxidants vitamin C and N-acetylcysteine and Ca^(2+)-binding agent EGTA was carried out,*** microscopy-based techniques were used to detect reactive nitrogen species(RNS)generation,involvement of caspase-3 and caspase-8,as well as the state of lipid order in cell membranes of erythrocytes exposed to human Glu^(21)-Ser^(157) ***:Our observations suggest that human Glu^(21)-Ser^(157) chemerin had no impact on eryptosis parameters at 2μg/***,chemerin stimulated phosphatidylserine externalization,ROS production,and Ca^(2+)accumulation at higher concentrations suggesting activation of ***^(2+)uptake turned out to be at least partly required for chemerin-mediated ***-mediated erythrotoxicity was additionally mediated by RNS,caspase-3,and ***,Glu^(21)-Ser^(157) chemerin promoted reduction in the liquid-ordered phase of cell membranes in ***:The present study first discloses that human chemerin can induce eryptosis via Ca^(2+)-dependent mechanisms at concentrations noticeably exceeding circulating ***,chemerin-induced eryptosis can hardly contribute to eryptosis-mediated anemia in disease

关键词： Adipokine Cell death Chemerin Oxidative stress Eryptosis

Increasing the Efficiency and Level of Environmental Safety of Pro-Environmental City Heat Supply Technologies by Low Power Nuclear Plants

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World Journal of Nuclear Science and Technology 2024年第2期14卷 107-117页

作者： Vladimir Kravchenko Igor Kozlov volodymyr Vashchenko Iryna Korduba Andrew Overchenko Serhii Tsybytovskyi Department of Nuclear Power Plants Odesa Polytechnic National University Odesa Ukraine Interdepartmental Scientific Center for Fundamental Research on Energy and Ecology of the National Academy of Sciences of Ukraine &#8220Odesa Polytechnic&#8221 and Ministry of Ecology of Ukraine Odesa Ukraine Department of Environmental Protection and Labor Protection Technologies Kyiv National University of Construction and Architecture Kyiv Ukraine

In connection with the current prospect of decarbonization of coal energy through the use of small nuclear power plants (SNPPs) at existing TPPs as heat sources for heat supply to municipal heating networks, there is a technological need to improve heat supply schemes to increase their environmental friendliness and efficiency. The paper proves the feasibility of using the heat-feeding mode of ASHPs for urban heat supply by heating the network water with steam taken from the turbine. The ratio of electric and thermal power of a “nuclear” combined heat and power plant is given. The advantage of using a heat pump, which provides twice as much electrical power with the same heat output, is established. Taking into account that heat in these modes is supplied with different potential, the energy efficiency was used to compare these options. To increase the heat supply capacity, a scheme with the use of a high-pressure heater in the backpressure mode and with the heating of network water with hot steam was proposed. Heat supply from ASHPs is efficient and environmentally friendly even in the case of significant remoteness of heat consumers.

关键词： Low-Capacity Nuclear Power Plants Environmental Friendliness of the Thermal Power Generation Mode Heat Generation Condensation Mode Heat Supply

Newly identified Au-Ag-Bi-Te mineralization in the Aydindere skarn Fe and Cu deposit， Giresun， NE Turkey: implications of gold mineralization during retrograde skarn evolution

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Journal of Earth Science 2024年

作者： Ahmet Sasmaz Vitaliy Sukach Serhiy Bondarenko Hryhorii Aleksiienko Hengameh Erfanian Kaseb Bilge Sasmaz Sergiy Kurylo Oleksandr Hrinchenko volodymyr Somka Panagiotis Voudouris Department of Geology， Firat University Faculty of Geology and Geoenvironment， National and Kapodistrian University of Athens Mineralogy and Ore Formation of National Academy of Science， M.P.Semenenko Institute of Geochemistry 3. Department of Petroleum Engineering， Eqbal Lahoori Institute of Higher Education

This study investigates the mineralogy and mineral-chemistry of a newly discovered Au-Ag-Bi-Te mineralization at the Aydindere Fe-Cu skarn deposit， within the Pontides Tectonic Unit， northeastern Turkey. The mineralization is developed in the skarn zone at the contact between Upper Cretaceous andesite-pyroclastic rocks and a Paleocene-Eocene I-type granitoid. The principal ore minerals of the Aydindere Fe-Cu deposit are oxides (magnetite)， sulfides (pyrite-chalcopyrite-galena-sphalerite)， tellurides/sulfotellurides (tetradymite， hessite)， sulfosalts (wittichenite， emplectite， aikinite) and native gold-electrum. Skarn minerals include anhydrous phases (garnet) formed in a prograde stage and hydrous phases (amphibole， epidote， chlorite)， which were formed in a retrograde stage in association with quartz， adularia， apatite and late calcite. Sulfides， tellurides and sulfosalts are introduced during the retrograde stage. The Au-Ag-Bi-Te mineralization was detected for the first time within the western ore body of the Aydindere deposit， and occurs in calcite-bearing sulfide bodies that cut magnetite-garnet-amphibole-epidote skarns with magnetite ores of different grade， including massive magnetite. Chlorite geothermometry indicates formation of the Au-Ag-Bi-Te mineralization at temperatures between 300 and 250 °C， during the retrograde skarn evolution. Assuming the temperature is ～275°C， logfS2= -10.5 to -13， logfO2= -37 to -33， and logfTe2values range from approximately -12 to -8.5 were estimated. The available mineralogical and geological data (presences of magnetite， oxidized-type tellurides/sulfotellurides， and andraditic garnets， and absence of pyrrhotite and arsenopyrite) suggest that Aydindere is an oxidized Au-bearing skarn deposit. The discovery of Au-Ag-Bi-Te mineralization at Aydindere increases its productivity and requires more detailed exploration in the deposit for precious (Au， Ag) and critical (Bi， Te) metals.

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