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Hepatobiliary system and intestinal injury in new coronavirus infection(COVID-19):A retrospective study

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World Journal of Clinical Cases 2023年第10期11卷 2226-2236页

作者： Konstantin V Kozlov Konstantin V Zhdanov Anna K Ratnikova Vyacheslav A Ratnikov Artem V Tishkov Vladimir Grinevich Yuriy A Kravchuk Panteley I Miklush Polina O Nikiforova Vera V Gordienko Alexander F popov Boris G Andryukov Department of Infectious Disease Military Medical Academy Named After SM.KirovSaint-Petersburg 194044Russia Department of Admission Federal State Budgetary Institution"North-West District Scientific and Clinical Center Named After LG.Sokolov Federal Medical and Biological Agency"Saint-Petersburg 194291Russia Department of Roentgenology Federal State Budgetary Institution"North-West District Scientific and Clinical Center Named After LG.Sokolov Federal Medical and Biological Agency"Saint-Petersburg 194291Russia Department of Physics Mathematics and InformaticsFSBEI HE IP.Pavlov SPbSMU MOH RussiaSaint-Petersburg 197022Russia 2nd Department of Therapy(Advanced Medical Education) Military Medical Academy Named After SM.KirovSaint-Petersburg 194044Russia School of Medicine Far Eastern Federal UniversityVladivostok 690922Russia

BACKGROUND An important area of effective control of the coronavirus disease 19(COVID-19)pandemic is the study of the pathogenic features of severe acute respiratory syndrome coronavirus 2 infection,including those based on assessing the state of the intestinal microbiota and *** To study the clinical features of the new COVID-19 in patients with mild and moderate severity at the stage of hospitalization,to determine the role of hepatobiliary injury,intestinal permeability disorders,and changes in the qualitative and quantitative composition of the microbiota in the development of systemic inflammation in patients with *** The study was performed in 80 patients with COVID-19,with an average age of 45 years,19 of whom had mild disease,and 61 had moderate disease *** scope of the examination included traditional clinical,laboratory,biochemical,instrumental,and radiation studies,as well as original methods for studying microbiota and intestinal *** The clinical course of COVID-19 was studied,and the clinical and biochemical features,manifestations of systemic inflammation,and intestinal microbiome changes in patients with mild and moderate severity were *** permeability characteristics against the background of COVID-19 were evaluated by measuring levels of proinflammatory cytokines,insulin,faecal calprotectin,and *** This study highlights the role of intestinal permeability and microbiota as the main drivers of gastroenterological manifestations and increased COVID-19 severity.

关键词： Novel coronavirus infection COVID-19 SARS-CoV-2 Zonulin Faecal calprotectin Microbiota

High-performance portable grating-based surface plasmon resonance sensor using a tunable laser at normal incidence

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Photonics Research 2024年第5期12卷 947-958页

作者： DUC LE ANNI RANTA-LASSILA TEEMU SIPOLA MIKKO KARPPINEN JARNO PETAJA MINNA KEHUSMAA SANNA AIKIO TIAN-LONG GUO MATTHIEU ROUSSEY JUSSI HILTUNEN ALEXEY popov VTT Technical Research Centre of Finland 90570 OuluFinland Department of Physics and Mathematics University of Eastern FinlandFI-80101 JoensuuFinland

Surface plasmon resonance(SPR)sensors are among the most sensitive *** such devices,a grating is a compelling alternative to a prism for the excitation of a surface plasmon,especially in the development of sensors for point-of-care applications due to their compactness and ***,we demonstrate the use of a tunable laser in a grating-based SPR system for further miniaturization and *** tunable laser working at normal incidence replaces spectral and moving components,while also simplifying the optical *** incidence is conventionally avoided due to the complexity of the control of degenerated SPR *** investigate,both computationally and experimentally,the splitting of the SPR modes at small nonzero incidences,which is lacking in previously reported *** optimizing the grating configuration,we were able to diminish the SPR mode splitting phenomenon when the excitation was feasible with the normal incidence *** fabricated sensor showed a high sensitivity of 1101.6 nm/***,the figure of merit of the sensor,defined as the ratio between the sensitivity and bandwidth of the SPR dip,was *** experimental results were consistent with the simulation *** also demonstrate its capability for detecting low concentrations of glucose and creatinine with the limit of detection of 14.2 and 19.1 mmol/L,respectively.

关键词： tunable splitting excitation

Nonequidistant two-dimensional antenna arrays based on Latin squares

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Journal of Measurement Science and Instrumentation 2019年第1期10卷 38-48页

作者： V F Kravchenko V I Lutsenko I V popov LUO Yi-yang Kotel’nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009Russia Usikov Institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Kharkiv 61085Ukraine V.N.Karazin Kharkiv National University Kharkiv 61022Ukraine

Non-equidistant sparse antenna arrays constructed on the basis of Latin squares are considered. A method for their construction and a synthesis algorithm are proposed,and the properties of two-dimensional antennas based on them,which ensure,at a high degree of rarefaction,a sufficiently small lateral radiation are studied. The features and main characteristics of such antennas are studied.

关键词： non-equidistant antenna array Latin square compound squares covered frequencies

Sensors for control of water transparency in optical and microwave ranges

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Journal of Measurement Science and Instrumentation 2018年第4期9卷 354-359页

作者： V F Kravchenko E V Krivenko V I Lutsenko I V popov Kotel’nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences Moscow 125009 Russia Bauman Moscow State Technical University Moscow 105005 Russia Scientific and Technological Center of Unique Instrumentation of Russian Academy of Sciences Moscow 119992 Russia Usikov Institute of Radiophysics and Electronics of National Academy of Sciences of Ukraine Kharkiv 61085 Ukraine

In the face of deteriorating environmental conditions in the world,water quality control is an urgent *** can be solved by creating sensors with high accuracy and low cost,which requires the development of fundamentally new radiophysical methods that take advantage of the optical,microwave and millimeter wavelengths that have a significantly greater sensitivity to low concentrations of pollutants and a lower *** article presents prototypes of measuring cells of the microwave and optical ranges as well as the results of an experimental study of water of various degrees of pollution with their *** results show that the use of the highly sensitive method of capillary-waveguide resonance makes it possible to detect the presence of micro impurities in water with concentrations up to0.1%and to identify water even from sources of various natural *** addition,the use of measurements at several frequencies in the optical range will make it possible to solve the problem of creating water control sensors with high sensitivity to pollution and low *** can be concluded that the possibility of complex use of multiwave sensors(optical,infrared and microwave ranges)allows to increase the sensitivity and reliability of water quality assessment.

关键词： optical sensor light attenuation in the medium optical transparency capillary-waveguide resonator dielectric characteristics Q-factor and depths of resonance absorption

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斑岩铜矿床矿石物质岩浆源

西北地质 1991年第A期12卷 43-46页

作者： popov,VS 陈会鑫

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纬纱继头率最低的织机速度的确定

国外纺织技术（纺织分册） 1994年第1期 29-31页

作者： popov,G 徐雷麟

磷掺杂剂和石墨烯包覆层对NiCo_(2)S_(4)电催化剂析氢活性和耐久性的协同影响

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Science China Materials 2023年第10期66卷 3875-3886页

作者：陈杰毛梁徐家琛顾修全 Zakhar I.popov 赵宇龙凌意瀚隋艳伟应鹏展蔡晓燕张俊英 School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Emanuel Institute of Biochemical Physics RAS 1193344 Kosigin st.MoscowRussian Federation School of Physics Beihang UniversityBeijing 100191China

探索具有优异导电性和稳定性的非贵金属电催化剂对氢经济至关重要.本研究将杂原子掺杂和石墨烯包覆相结合,以控制NiCo_(2)S_(4)(NCS)蛋黄壳微球的电子性能,并抵抗酸性介质中H_(2)O和O_(2)的腐蚀.密度泛函理论(DFT)模拟结合综合表征和实... 详细信息

探索具有优异导电性和稳定性的非贵金属电催化剂对氢经济至关重要.本研究将杂原子掺杂和石墨烯包覆相结合,以控制NiCo_(2)S_(4)(NCS)蛋黄壳微球的电子性能,并抵抗酸性介质中H_(2)O和O_(2)的腐蚀.密度泛函理论(DFT)模拟结合综合表征和实验首次揭示了在NCS中引入P杂原子不仅加速了电子从体相向表面的转移动力学,而且降低了掺杂P原子附近活性S位上的析氢反应势垒.利用DFT计算的穿透能垒预测了rGO覆盖层在P掺杂NCS(P-NCS)表面对质子的渗透性和对H_(2)O和O_(2)分子的抵抗性等重要功能,并用X射线光电子能谱对新催化剂和回收催化剂进行了验证.利用P掺杂剂和rGO覆盖层分别辅助电荷传递和质子传递,通过二者的协同作用获得了催化活性和耐久性之间的平衡.因此,优化后的P-NCS/rGO在70 mV的低过电位下实现了10 mA cm^(-2)的电流密度,并具有令人满意的80小时耐用性.本工作阐明了石墨烯覆盖硫化物催化剂可通过调控电子结构和质子/分子穿透提高电催化性能.

关键词： electrocatalysis elemental doping proton penetration hydrogen evolution corrosion resistance

The Paleogeographic Reconstruction for the Central Regions of the Western Siberian Basin in the Middle Jurassic Epoch

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地学前缘 2009年第S1期16卷 193-193页

作者： Aleksey Yu.popov Lyudmila G.Vakulenko Valeriy A.Kazanenkov Ilicha-21 Str. Novosibirsk 630090Russia

The complex investigation of the Bathonian sedimentary deposits in central regions of the WestSiberian basin was *** the basis both of lithofacial analysis of core clefts and the geophysical investigation data and taking into account the tectonic features of the Jurassic structural storey the sedimenttological model of deposits was built and the main regularities of its building were *** the initial stage the framework of alluvial lower plain

关键词： paleogeography lithology sediment-tary environments Middle Jurassic Western Siberia

Littrow装置的光栅总特民生和能流分布

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北光通讯 1996年第1期 27-33页

作者：臧甲鹏 popov.,E

运用能流分布的观点解释了光栅各种特性对槽深所依存在的某些条件下的准确周期性，对于具有一个或两个衍射级的两种光栅，能流图中涡流的形成以槽深ｈ为函数，建立了浅光栅和深光栅之间的等量关系，槽上方的能流分布（ＥＦＤ）相同，而... 详细信息

运用能流分布的观点解释了光栅各种特性对槽深所依存在的某些条件下的准确周期性，对于具有一个或两个衍射级的两种光栅，能流图中涡流的形成以槽深ｈ为函数，建立了浅光栅和深光栅之间的等量关系，槽上方的能流分布（ＥＦＤ）相同，而在深光栅中存在一定数目的涡流，它们都藏于每一沟槽的内部。完全闪耀和反闪耀（ａｎｔｉ－ｂｌａｚｉｎｇ）与这些涡流相对于沟槽顶端的位置密切相关。

关键词：光栅能流分布涡流