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Phylogeny of Brucella abortus strains isolated in the Russian Federation

Asian Pacific Journal of Tropical Medicine 2021年第7期14卷 323-329页

作者： Dmitry A.Kovalev Dmitriy G.Ponomarenko sergey V.Pisarenko nikolay A.shapakov Anna A.Khachaturova n.talia s.serdyuk Olga V.Bobrysheva Alexander n.Kulichenko stavropol Research Anti-Plague Institute 355035StavropolRussian Federation

Objective: To study Brucella(B.) abortus strains isolated in the Russian Federation, in order to identify their detailed position in the phylogenetic structure of the species global population as well as to determine genetic relationships for isolates from different geographical ***: Based on Bayesian method, the whole genome singlenucleotide polymorphism(snP) analysis of 258 B. abortus strains from different geographical areas of the world including 20 B. abortus strains isolated in Russia was carried out. Results: The core genome snP analysis of the B. abortus isolates allowed describing the main genetic lineages. The Russian strains entered two separate clades, including the basal branch and the C1 branch that is widely spread in Eurasia. The data on the isolation time was used for the dating of phylogenetic tree, and also the estimated time frame for the B. abortus genotype diversification was determined. There were sets of specific snPs identified, which defined each of the genotypes and ***: A significant genetic diversity of the brucellosis pathogen strains from Russia has been proven. The sets of unique specific snPs described in our study may become one of the elements within a bio-informational analysis algorithm to be used for epidemiological study of brucellosis outbreaks, including those caused by new(atypical) genetic variants of B. abortus.

关键词： Brucella abortus Phylogeny Evolution Genome snP

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THz plasmonics and electronics in germanene nanostrips

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半导体学报:英文版 2023年第10期44卷 37-49页

作者： talia Tene Marco Guevara Gabriela Tubon-Usca Oswaldo Villacrés Cáceres Gabriel Moreano Cristian Vacacela Gomez stefano Bellucci Department of Chemistry Universidad Técnica Particular de Loja110160 LojaEcuador UnICARIBE Research Center University of CalabriaI-87036 RendeCSItaly Grupo de Investigación en Materiales Avanzados(GIMA) Facultad de CienciasEscuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Facultad de Ciencias Escuela Superior Politécnica de Chimborazo(ESPOCH)RiobambaEcuador Faculty of Mechanical Engineering Escuela Superior Politécnica de Chimborazo(ESPOCH)Riobamba 060155Ecuador InFn-Laboratori nazionali di Frascati Via E.Fermi 54I-00044 FrascatiItaly

Germanene nanostrips(Genss)have garnered significant attention in modern semiconductor technology due to their exceptional physical characteristics,positioning them as promising candidates for a wide range of *** exhibit a two-dimensional(buckled)honeycomb-like lattice,which is similar to germanene but with controllable *** modeling of Genss is essential for developing appropriate synthesis methods as it enables understanding and controlling the growth process of these ***,one can adjust the strip width,which in turn can tune the bandgap and plasmonic response of the material to meet specific device *** this study,the objective is to investigate the electronic behav-ior and THz plasmon features of Genss(≥100 nm wide).A semi-analytical model based on the charge-carrier velocity of free-standing germanene is utilized for this *** charge-carrier velocity of freestanding germanene is determined through the GW approximation(V_(F)=0.702×10^(6)m·s^(−1)).Within the width range of 100 to 500 nm,Genss exhibit narrow bandgaps,typi-cally measuring only a few ***,upon analysis,it was found that the bandgaps of the investigated Genss ranged between 29 and 6 *** well,these nanostrips exhibit√q-like plasmon dispersions,with their connected plasmonic fre-quency(≤30 THz)capable of being manipulated by varying parameters such as strip width,excitation plasmon angle,and sam-ple *** manipulations can lead to frequency variations,either increasing or decreasing,as well as shifts towards larger momentum *** outcomes of our study serve as a foundational motivation for future experiments,and further con-firmation is needed to validate the reported results.

关键词： nanostrips carrier velocity germanene plasmonics electronics

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shaping of strategic Development Management for Ukrainian Engineering Companies: Economic Prerequisites

Shaping of Strategic Development Management for Ukrainian En...

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作者： V.n.serdyuk Donetsk national University 6a/33 shevchenko blvd.Donetsk-15 83015Ukraine

The article analyses the statistical data to uncover the reasons behind the current crisis in Ukraine’s engineering *** is a vital element not just of Ukraine’s manufacturing sector,but of the country’s economy as a *** provides for domestic extraction,energy and metals *** should be noted that some Ukrainian engineering

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Optical nanoimpacts of Dielectric and Metallic nanoparticles on Gold surface by Reflectance Microscopy: Adsorption or Bouncing?

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Journal of Analysis and Testing 2019年第2期3卷 175-188页

作者： Jean-François Lemineur talia Jane stockmann Jérôme Médard Claire smadja Catherine Combellas Frédéric Kanoufi Universitésorbonne Paris Cité UniversitéParis DiderotITODYSCNRS UMR 708615 rue J.A.de Baïf75013 ParisFrance Present Address:Memorial University of newfoundland Chemistry Department283 Prince Philip Dr.St.John’sNL A1B 3X7Canada Faculty of Pharmacy University Paris-SudCNRS UMR 86125 rue J.B.Clément92296 Châtenay-MalabryFrance

Optical modeling coupled to experiments show that a microscope operating in reflection mode allows imaging,through solutions or even a microfluidic cover,various kinds of nanoparticles,nPs,over a(reflecting)sensing surface,here a gold(Au)*** modeling suggests that this configuration enables the interferometric imaging of single nPs which can be characterized individually from local change in the surface *** interferometric detection improves the optical limit of detection compared to classical configurations exploiting only the light scattered by the *** method is then tested experimentally,to monitor in situ and in real time,the collision of single Brownian nPs,or optical nanoimpacts,with an Au-sensing ***,mimicking a microfluidic biosensor platform,the capture of 300 nm FeOx maghemite nPs from a convective flow by a surface-functionalized Au surface is dynamically ***,the adsorption or bouncing of individual dielectric(100 nm polystyrene)or metallic(40 and 60 nm silver)nPs is observed directly through the *** influence of the electrolyte on the ability of nPs to repetitively bounce or irreversibly adsorb onto the Au surface is *** such visualization mode of single-nP optical nanoimpacts is insightful for comprehending single-nP electrochemical studies relying on nP collision on an electrode(electrochemical nanoimpacts).

关键词： Reflection microscopy single nanoparticle sensor Adsorption silver Polystyrene

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