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A sensing mechanism for the detection of carbon nanotubes using selective photoluminescent probes based on ionic complexes with organic dyes

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Light(Science & Applications) 2016年第1期5卷 686-694页

作者： Petro Lutsyk Raz Arif Jan Hruby Anatolii Bukivskyi Olexander Vinijchuk Mykola Shandura viktor yakubovskyi Yuri Kovtun Graham A Rance Michael Fay Yuri Piryatinski Oleksiy Kachkovsky Anatoli Verbitsky Aleksey Rozhin Institute of Physics National Academy of Sciences of Ukraine46prospekt Nauky03680 KyivUkraine School of Engineering&Applied Science Aston UniversityAston TriangleB47ET BirminghamUK Physics Department Faculty of ScienceUniversity of SulaimaniP.O.Box 334SulaimaniIraq-Kurdistan Region Brno University of Technology CEITEC BUTTechnicka´3058/1061600 BrnoCzech Republic Institute of Organic Chemistry National Academy of Sciences of Ukraine5 Murmanska str.02660 KyivUkraine School of Chemistry University of NottinghamUniversity ParkNottinghamNG72RDUK Nottingham Nanotechnology and Nanoscience Centre University of NottinghamUniversity ParkNottinghamNG72RDUK

The multifunctional properties of carbon nanotubes(CNTs)make them a powerful platform for unprecedented innovations in a variety of practical *** a result of the surging growth of nanotechnology,nanotubes present a potential problem as an environmental pollutant,and as such,an efficient method for their rapid detection must be ***,we propose a novel type of ionic sensor complex for detecting CNTs–an organic dye that responds sensitively and selectively to CNTs with a photoluminescent *** complexes are formed through Coulomb attractions between dye molecules with uncompensated charges and CNTs covered with an ionic surfactant in *** demonstrate that the photoluminescent excitation of the dye can be transferred to the nanotubes,resulting in selective and strong amplification(up to a factor of 6)of the light emission from the excitonic levels of CNTs in the near-infrared spectral range,as experimentally observed via excitation-emission photoluminescence(PL)*** chirality of the nanotubes and the type of ionic surfactant used to disperse the nanotubes both strongly affect the amplification;thus,the complexation provides sensing selectivity towards specific ***,neither similar uncharged dyes nor CNTs covered with neutral surfactant form such *** model organic molecules,we use a family of polymethine dyes with an easily tailorable molecular structure and,consequently,tunable absorbance and PL *** provides us with a versatile tool for the controllable photonic and electronic engineering of an efficient probe for CNT detection.

关键词： carbon nanotubes ionic surfactant organic dye photoluminescence sensor

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Evolutionary Trends of the Genus Ancyrogondolella(Conodonta)and Related Taxa in the Norian(Late Triassic)

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Journal of Earth Science 2021年第3期32卷 700-708页

作者： viktor Karadi Department of Palaeontology Eotvos Lorand UniversityBudapest 1117Hungary

The Norian represents the longest stage of the Triassic,nevertheless,its precise subdivision is an unresolved *** might be useful in the establishment of an accurate biozonation to avoid common scientific *** the Norian evolutionary trends and morphological changes of the Ancyrogondolella lineage(genus Ancyrogondolella and descendant genera Epigondolella,Orchardella and Mockina)is of key importance in this *** forward shifting of the pit and the posterior prolongation of the keel and the carina characterize the main trend that corresponds to the faunal turnover around the Lacian-Alaunian transition.A gradual decrease in overall element width and length can be observed from that time on,which couples with a decrease in the length of the free blade and an increase in the height of the anterior platform *** presence of secondary carinae is characteristic for the mid-Lacian 1 to Alaunian 1,but their development shows no trends and has no taxonomic *** specimens of the Lacian generally have an arched lower profile,whereas in the Alaunian and Sevatian the lower profile is dominantly stepped or *** thorough documentation of the Tethyan assemblages is needed for any detailed taxonomic and paleobiogeographic comparisons with other regions.

关键词： conodonts evolution Ancyrogondolella Late Triassic Norian Lacian Alaunian Sevatian

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Disentangling the Hippocampal Projectome

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Neuroscience Bulletin 2024年第10期40卷 1593-1596页

作者： viktor Varga Subcortical Modulation Research Group HUN-REN Institute of Experimental MedicineBudapest 1083Hungary

If someone asked which brain region results in the most hits in a Pubmed search,the hippocampus would come out as a clear *** has been known as the epicenter of the brain's memory system since the seminal paper by William Beecher Scoville and Brenda Milner[1].The discovery of place cells gave birth to the still dominant view of the hippocampus as the locus of the cognitive map[2],an internal model that guides our actions and is based on experience and sculpted by the inner state of the *** turn,the regulation of emotional and related autonomic processes is also linked to the hippocampus[3].

关键词： emotional someone hippocampus

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Jetting-based bioprinting:process,dispense physics,and applications

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Bio-Design and Manufacturing 2024年第5期7卷 771-799页

作者： Wei Long Ng viktor Shkolnikov Singapore Centre for 3D Printing(SC3DP) School of Mechanical and Aerospace EngineeringNanyang Technological University(NTU)Singapore 639798Singapore HP Inc. Palo AltoCA 94304USA

Jetting-based bioprinting facilitates contactless drop-on-demand deposition of subnanoliter droplets at well-defined positions to control the spatial arrangement of cells,growth factors,drugs,and biomaterials in a highly automated layer-by-layer fabrication *** to its immense versatility,jetting-based bioprinting has been used for various applications,including tissue engineering and regenerative medicine,wound healing,and drug development.A lack of in-depth understanding exists in the processes that occur during jetting-based *** review paper will comprehensively discuss the physical considerations for bioinks and printing conditions used in jetting-based *** first present an overview of different jetting-based bioprinting techniques such as inkjet bioprinting,laser-induced forward transfer bioprinting,electrohydrodynamic jet bioprinting,acoustic bioprinting and microvalve ***,we provide an in-depth discussion of various considerations for bioink formulation relating to cell deposition,print chamber design,droplet formation and droplet ***,we highlight recent accomplishments in jetting-based *** present the advantages and challenges of each method,discuss considerations relating to cell viability and protein stability,and conclude by providing insights into future directions of jetting-based bioprinting.

关键词： 3D bioprinting Biofabrication Jetting-based Dispense physics Machine learning

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Desorption isotherms and isosteric heat of anaerobic fermentation residues

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2510-2517页

作者： Tibor Poós viktor Szabó Department of Building Services and Process Engineering Faculty of Mechanical EngineeringBudapest University of Technology and EconomicsBertalan Lajos u.4-6H-1111 BudapestHungary

This paper presents the equilibrium desorption isotherms and the isosteric heat of sorption of a mixture containing mechanically dewatered fermentation residue(obtained from a blend of chicken,swine and cattle manure)used in biogas plants and corn spoiled silage in a ratio of 2:*** moisture desorption isotherms of the fermentation residue were determined at 32°C,40°C and 80°C and in the relative humidity range of 0.057/1 using static gravimetric *** equations were used to analyze the desorption data of Modified Henderson,Modified Halsey,Modified Oswin,Modified Chung–Pfost and Modified GAB *** constants of the model equations were calculated by non-linear regression *** Modified Henderson model fitted to the desorption isotherm data *** the proposed function,the final moisture content of the material can be determined as long as it can be dried in infinite time with the drying gas in the given *** isosteric heat of desorption was calculated by using the Modified Henderson model in the studied temperature range based on the Clausius–Clapeyron *** isosteric heat varied between 46 k J·mol-1 and 67 k J·mol-1 at moisture levels 1.91 b Xe<4.05 kgH2O·kgdP-1 for the material.

关键词： Desorption Equilibrium Model Measurement Isosteric heat

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Origin of Luminescent Centers and Edge States in Low-Dimensional Lead Halide Perovskites:Controversies,Challenges and Instructive Approaches

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Nano-Micro Letters 2019年第2期11卷 109-126页

作者： Jiming Bao viktor G.Hadjiev Department of Electrical and Computer Engineering University of HoustonHoustonTX 77204USA Department of Chemistry University of HoustonHoustonTX 77204USA Materials Science and Engineering University of HoustonHoustonTX 77204USA Texas Center for Superconductivity University of HoustonHoustonTX 77204USA Department of Mechanical Engineering University of HoustonHoustonTX 77204USA

With only a few deep-level defect states having a high formation energy and dominance of shallow carrier non-trapping defects,the defect-tolerant electronic and optical properties of lead halide perovskites have made them appealing materials for high-efficiency,low-cost,solar cells and light-emitting *** such,recent observations of apparently deep-level and highly luminescent states in low-dimensional perovskites have attracted enormous attention as well as intensive *** observed green emission in 2D CsPb2Br5 and 0 D Cs4PbBr6 poses an enigma over whether it is originated from intrinsic point defects or simply from highly luminescent CsPbBr3 nanocrystals embedded in the otherwise transparent wide band gap *** nature of deep-level edge emission in 2D Ruddlesden–Popper perovskites is also not well *** this mini review,the experimental evidences that support the opposing interpretations are analyzed,and challenges and root causes forthe controversy are *** in the current density functional theory approaches to modeling of properties and intrinsic point defects in lead halide perovskites are also *** experimental approaches are suggested to better correlate property with structure of a material and help resolve the *** and identification of the origin of luminescent centers will help design and engineer perovskites for wide device applications.

关键词： Low-dimensional perovskites Luminescent centers Edge states Cesium lead halides Deep-level states Ruddlesden–Popper perovskites

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Average stress-average strain tension-stiffening relationships based on provisions of design codes

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第10期12卷 731-736页

作者： Gintaris KAKLAUSKAS viktor GRIBNIAK Rokas GIRDZIUS Department of Bridges and Special Structures Vilnius Gediminas Technical University Department of Strength of Materials Vilnius Gediminas Technical University

This research was aimed at deriving average stress-average strain tension-stiffening relationships in accordance with the provisions of design codes for reinforced concrete （RC） members. Using a proposed inverse technique, the tension-stiffening relationships were derived from moment-curvature diagrams of RC beams calculated by different code methods, namely Eurocode 2, AC1318, and the Chinese standard GB 50010-2002. The derived tension-stiffening laws were applied in a numerical study using the nonlinear finite element software ATENA. The curvatures calculated by ATENA and the code methods were in good agreement.

关键词： Reinforced concrete (RC) Code technique Tension-stiffening Numerical modeling

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A new global ocean hydrographic climatology

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Atmospheric and Oceanic Science Letters 2019年第3期12卷 226-229页

作者： GOURETSKI viktor Center for Earth System Research and Sustainability University of Hamburg International Center for Climate and Environment Sciences Institute of Atmospheric Physics Chinese Academy of Sciences

This report describes the main features of the recently published World Ocean Experiment–Argo Global Hydrographic Climatology. This climatology is based on profile data from ships, Argo floats, and sensors attached to marine mammals. As an important deviation from the widely used climatologies produced previously by the National Oceanographic Data Center, the spatial interpolation was performed on local potential density surfaces, so that no ‘artificial water masses’ were created. In addition to monthly fields of temperature and salinity, gridded maps of the upper mixed layer depth are now provided.

关键词： Global ocean climatology interpolation method upper mixed layer depth

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Experimental study on influence of blade angle and particle size on particle mechanics on a batch-operated single floor of a multiple hearth furnace

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Particuology 2024年第2期85卷 224-240页

作者： Max Kriegeskorte Nikoline Hilse Phil Spatz viktor Scherer Institute for Energy Plant Technology(LEAT) Ruhr University BochumUniversitätsstraβe 15044780 BochumGermany

In industry,multiple hearth furnaces are used for the thermal treatment of particulate *** current contribution concentrates on the experimental analysis of particle mechanics for a batch-operated single floor of a multiple hearth *** particles are agitated on the circular floor by a single,rotating rabble arm equipped with three flat rabble blades of 10 mm *** blade angle,defined as the angle,which the blade is inclined against the tangential direction,is varied from 0°to 90°.A single layer of spherical polyoxymethylene(POM)particles with three different diameters(5,10 and 20 mm)is placed on the *** analyze the results,two parameters have been extracted from image analysis when the bed of particles is agitated,first,the area not covered by particles and second,the frequency distribution of the mean distance among the *** particle free surface area increases with the inclination of the *** evolution of the particle free surface area differs for the different particle *** general,the maximum particle free area for all blade angles is the largest for the 5 mm particles followed by the 20 mm *** the 10 mm particles,the particle free surface area starts for a blade angle of 0°at larger values than for the 20 mm particles but the values fall below the values for the 20 mm particles for larger blade *** reason for this behavior is discussed in *** mean distance among the particles is a parameter characterizing the length scales dominating the effects on the *** frequency distribution of the mean distance among particles provides infor-mation about the morphology of the particle bulk,for example,whether the free surface area is inter-spersed with particles.

关键词： Hearth furnace floor Particle movement Spherical particles Particle free surface area Mean distance among particles

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The coronavirus disease-19 pandemic and acute coronary syndrome:a specific impact in the elderly

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Journal of Geriatric Cardiology 2022年第5期19卷 325-334页

作者： viktorČulić Ahmed AlTurki Riccardo Proietti Department of Cardiology and Angiology University Hospital Centre SplitSplitCroatia University of Split School of Medicine SplitCroatia Division of Cardiology McGill University Health CentreMontrealQuebecCanada Liverpool Centre for Cardiovascular Science University of LiverpoolLiverpoolUnited Kingdom

The coronavirus disease-19(COVID-19)pandemic has dramatically burdened healthcare systems worldwide by creating new public health *** addition to the most prevalent presentation of COVID-19 with mild to moderate respiratory symptoms,which occasionally progresses to acute respiratory distress syndrome,cardiovascular complications of COVID-19 include arterial and venous thromboembolic events(pulmonary embolism,acute myocardial infarction(MI)and ischemic stroke),myocarditis/myocardial injury.

关键词： acute respiratory distress

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