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Serological surveillance for SARS-CoV-2 antibodies among students,faculty and staff within a large university system during the pandemic

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World Journal of Virology 2025年第1期14卷 99-107页

作者： marcos G Pinheiro Gabriela G o Alves maria Eduarda R Conde Sofia L Costa Regina C S Sant’Anna Isa m F Antunes mônica C Carneiro Fabio S Ronzei Julia C Scaffo Felipe R Pinheiro Lialyz S Andre Helvecio C Povoa Valéria T Baltar Fabíola Giordani Eduarda S Hemerly Gisele C Alexandre Karla C de Paula m.rc.o watanabe Antonio Claudio L da Nóbrega Jackeline Christiane P Lobato Fabio Aguiar-Alves Laboratory of molecular Epidemiology and Biotechnology Rodolpho Albino University LaboratoryFluminense Federal UniversityNiterói 24241000Rio de JaneiroBrazil Estácio de SáUniversity Nova Friburgo 28611135Rio de JaneiroBrazil Pathology Program Medicine schoolFluminense Federal UniversityNiterói 24070090Rio de JaneiroBrazil Department of Pharmaceutical Sciences Lloyd L.Gregory School of PharmacyPalm Beach Atlantic UniversityWest Palm BeachFL 33401United States Health Institute of Nova Friburgo Fluminense Federal UniversityNova Friburgo 28613001Rio de JaneiroBrazil Department of Epidemiology and Biostatistics Institute of Collective Health(ISC)Fluminense Federal UniversityNiterói 24033900Rio de JaneiroBrazil Institute of Physical Education Fluminense Federal UniversityNiterói 24020005Rio de JaneiroBrazil Department of Statistics Fluminense Federal UniversityNiterói 24210200Rio de JaneiroBrazil Department of Physiology and Pharmacology Fluminense Federal UniversityNiterói 24210130Rio de JaneiroBrazil

BACKGRoUND At the end of December 2019,the world faced severe acute respiratory syndrome-coronavirus 2(SARS-CoV-2),which led to the outbreak of coronavirus disease 2019(CoVID-19),associated with respiratory *** virus has shown significant challenges,especially for senior citizens,patients with other underlying illnesses,or those with a sedentary *** tests conducted early on have helped identify how the virus is transmitted and how to curb its *** study hypothesis was that the rapid serological test for SARS-CoV-2 antibodies could indicate the immunoreactive profile during the CoVID-19 pandemic in a university *** To conduct active surveillance for serological expression of anti-SARS-CoV-2 antibodies in individuals within a university setting during the CoVID-19 *** This sectional study by convenience sampling was conducted in a large university in Niteroi-RJ,Brazil,from march 2021 to July *** study population consisted of students,faculty,and administrative staff employed by the university.A total of 3433 faculty members,60703 students,and 3812 administrative staff were invited to *** were gathered through rapid serological tests to detect immunoglobulin(Ig)m and IgG against ***χ²or Fisher's exact test was used to conduct statistical analysis.A 0.20 significance level was adopted for variable selection in a multiple logistic regression model to evaluate *** A total of 1648 individuals were enrolled in the *** proportion of CoVID-19 positivity was 164/1648(9.8%).The adjusted logistic model indicate a positive association between the expression of Igm or IgG and age[odds ratio(oR)=1.16,95%CI:1.02-1.31](Po had been in contact with a CoVID-19-positive case(oR=3.49,95%CI:2.34-5.37)(Pose who had received the CoVID-19 vaccine(oR=2.33,95%CI:1.61-3.35)(Pocial isolation(oR=0.59,95%CI:0.41-0.84)(Pood of sho

关键词： Serological surveillance SARS-CoV-2 antibodies CoVID-19 Serological rapid test Risk factors for CoVID-19

Numerical and Experimental Investigation on the In-Flight melting Behaviour of Granulated Powders in Induction Thermal Plasmas

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Plasma Science and Technology 2009年第1期11卷 71-77页

作者：姚耀春 md.m.HoSSAIN T.watanabe National Engineering Laboratory of Vacuum metallurgy Kunming University of Science and Technology Department of Environmental Chemistry and Engineering Tokyo Institute of Technology Department of Electronics and Communications Engineering East West University

An innovative in-flight glass melting technology with thermal plasmas was developed for the purpose of energy conservation and environment protection. In this study, modelling and experiments of argon-oxygen induction thermal plasmas were conducted to investigate the melting behaviour of granulated soda-lime glass powders injected into the plasma. A two-dimensional local thermodynamic equilibrium （LTE） model was performed to simulate the heat and momentum transfer between plasma and particle. Results showed that the particle temperature was strongly affected by the flow rate of carrier gas and the particle size of raw material. A higher flow rate of carrier gas led to lower particle temperature and less energy transferred to particles which resulted in lower vitrification. The incomplete melting of large particles was attributed to the lower central temperature of the particle caused by a larger heat capacity. The numerical analysis explained well the experimental results, which can provide valuable practical guidelines for the process control in the melting process for the glass industry.

关键词： induction thermal plasmas size. heat transfer numerical modelling carrier gas flow rate particle

Performance evaluation of a water erosion tracer using plot-scale experiments and process-based modeling

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International Soil and Water Conservation Research 2023年第4期11卷 622-632页

作者： João m.Villela Jamil A.A.Anache Alex m.watanabe Dennis C.Flanagan Edson C.Wendland Silvio Crestana EmBRAPA-Brazilian Agricultural Research Corporation LNNA-National Laboratory of Nanotechnology for AgrobusinessSt.XV de NovembroSão CarlosSP13560-970Brazil University of São Paulo(USP) São Carlos School of Engineering.Graduate Program in Environmental Engineering Sciences(PPG-SEA)Av.Trabalhador São-CarlenseCxP.359São CarlosSP13566590Brazil Department of Hydraulics and Sanitation São Carlos School of Engineering(EESC)University of São Paulo(USP)CxP.359São CarlosSP13566-590Brazil Federal University of mato Grosso Do Sul CxP.549Campo Grande.MS.79070-900Brazil USDA-Agricultural Research Service National Soil Erosion Research Laboratory275 S.Russell StWest LafayetteIN47907USA

Socioeconomic and environmental losses caused by water erosion have highlighted the importance of quantifying and understanding the dynamics of soil redistribution in the landscape to develop effective soil management *** methods are applied to estimate erosion/deposition rates and identify sources of sediments,among them,the one that uses rare earth elements(REE)as a tracer stands ***,an alternative not yet explored that can benefit the accuracy of the estimates provided by the method is using a tracer containing a chemical signature composed of more than one *** present study aimed to evaluate the performance of a new water erosion tracer based on montmoril-lonite labeled with rare earth elements(La40-mmT).The innovative aspects of this La40-mmT tracer include its highly stable multi-chemical signature(Nd^(3+),La^(3+),and Pr^(3+)),which enhances tracer detection in the environment,and its low production cost due to the use of an industrial residue in the synthesis *** tracer was evaluated for a typical soil of the Cerrado biome,using a natural rainfall field-scale plot-NRFP(5 m × 20 m)and a physical predictive erosion model(WEPP).The results showed that the La40-mmT tracer could be used to estimate erosion/deposition rates,with agreement between the values observed with the tracer and the WEPP ***,this study confirmed the great potential of La40-mmT as a tool to identify patterns of soil redistribution at the field scale and aid in the validation of erosion models.

关键词： Soil erosion Tracer Rare earth elements Deposition Sediment source WEPP model

Scleroderma nastii ***.,a gasteroid mushroom from Phulchoki hill,Nepal

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Studies in Fungi 2020年第1期5卷 50-58页

作者： Raut JK Basukala o Shrestha R Poudel rc Faculty of Science Nepal Academy of Science&Technology(NAST)KhumaltarLalitpur GPO Box 3323 KathmanduNepal Current affiliation Tumour Virology Lab International Centre for Genetic Engineering and Biotechnology(ICGEB)Padriciano 9934149 TriesteItaly

A new species of Scleroderma is described from temperate oak forest of Phulchoki hill,at the highest peak(2,762 m)ringing the Kathmandu valley,*** to velvety,pseudostipitate basidiome,smaller and sub-reticulate basidiospores in comparison to its close relatives,are key diagnostic features of this newly discovered *** novelty of the taxon was also confirmed based on phylogenetic analysis using the data sets of the internal transcribed spacer region(ITS)of nuclear rDNA sequences along with the analysis of scanning electron micrographs of its basidiospores.A comprehensive description,illustrations,and comparisons with phenetically similar species are provided in this *** surveys are needed to verify the species diversity and clarify their geographic distribution.

关键词： Ectomycorrhiza Lalitpur oak forest Phylogeny Pseudostipe

An Investigation on the Formation of Submerged Bar Under Surges in Sandy Coastal Region

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China ocean Engineering 2012年第3期26卷 535-546页

作者： mustafa DEmIrcI m.Sami AKZ Civil Engineering Department Engineering FacultyMustafa Kemal UniversityskenderunHatay 31040Turkey Civil Engineering Department Engineering and Architecture Facultyukurova UniversityAdana 01100Turkey

Cross-shore sediment transport rate exposed to waves is very important for coastal morphology, the design of marine structures such as seawalls, jetties, breakwaters etc, and the prevention of coastal erosion and accretion due to onoff shore sediment transportation. In the present study, the experiments on cross-shore sediment transport are carried out in a laboratory wave channel with initial beach slopes of 1/8, 1/10 and 1/15. By using the regular waves with different deep-water wave steepnesses generated by a pedal-type wave generator, the geometrical characteristics of beach profiles under storm conditions and the parameters affecting on-off shore sediment transport are investigated for the beach materials with medium diameters of d50=0.25, 0.32, 0.45, 0.62 and 0.80 mm. The offshore bar geometric characteristics are the horizontal distances from the shoreline to the bar beginning （Xb）, crest （Xt）, and ending （Xs） points, the depth from the bar crest to the still water level （ht）, and the bar volume （Vbar）. The experimental results have indicated that when the deep-water steepness （Ha/L0） increased, the net movement to seaside increased. With the increasing wave steepness, the bars moved to widen herewith the vertical distances from still water level to the bar beginning （Xb）, crest （Xt） and ending （Xs） points and the horizontal distances from the coast line to the bar beginning, crest and ending points increased. It was also shown from experimental results that the horizontal distances from the bar beginning and ending points to the coast line increased with the decrease of the beach slope. The experimental results obtained from this study are compared with previous experimental work and found to be of the same magnitude as the experimental measurements and followed the expected basic trend.

关键词： cross-shore sediment transport beach profiles bar parameters experimental study

Application of In-Flight melting Technology by RF Induction Thermal Plasmas to Glass Production

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Plasma Science and Technology 2008年第3期10卷 344-347页

作者：姚耀春 m.m.HoSSAIN T.watanabe F.FUNABIKI T.YANo National Engineering Laboratory of Vacuum metallurgy Kunming University of Science and Technology Kunming 650093 China Department of Environmental Chemistry and Engineering Tokyo Institute of Technology Yokohama 226-8502 Japan Department of Environmental Chemistry and Engineering Tokyo Institute of TechnologyYokohama 226-8502 Japan Department of Chemistry and materials Science Tokyo Institute of Technology Tokyo 152-8550 Japan

An innovative in-flight glass melting technology with induced thermal plasmas was developed for the purpose of energy conservation and environmental protection. Two-dimensional modeling was used to simulate the thermofluid fields in the plasma torch. The in-flight melting behavior of glass raw material was investigated by various analysis methods. Results showed that the plasma temperature was up to 10000 K with a maximum velocity over 30 m/s, which made it possible to melt the granulated glass raw material within milliseconds. The carbonates in the raw material decomposed completely and the compounds in the raw material attainted 100% vitrification during the in-flight time from the nozzle exit to substrate. The particle melting process is similar to the unreacted-core shrinking model.

关键词： induced thermal plasmas in-flight melting plasma heat transfer glass production

Rendering Grass Blowing in the Wind with Global Illumination

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Tsinghua Science and Technology 2010年第2期15卷 133-137页

作者： N max S Saito K watanabe m Nakajima Computer Science Department University of California Department of Computer Science Tokyo Institute of Technology

We have simulated a time varying wind field using the lattice Boltzmann model, and its effect on blades of grass with a simple mass-spring model. We present a global illumination model for multiple scattering of incident sun and sky illumination within the field of grass. We model the grass as a continuous distribution of infinitesimal colored scattering flakes and solve a system of differential equations for the radiance transport. We repeat this for a collection of grass bending directions and amounts, and then interpolate the solutions when rendering animations of blowing grass.

关键词： global illumination lattice Boltzmann method plane parallel radiation transport

Studies of multilayer structure in depth direction by soft X-ray spectroscopy

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Nuclear Science and Techniques 2006年第5期17卷 257-267页

作者： m. watanabe T. EJImA N. mIYATA T. ImAZoNo m. YANAGIHARA Shanghai Dianji University Institute of Composite materials Shanghai Jiaotong University Shanghai 200030 China Saga University Synchrotron Light Application Center Japan Institute of multidisciplinary Research for Advanced materials Tohoku University Japan Institute of multidisciplinary Research for Advanced materials Tohoku University

It is demonstrated that two kinds of soft X-ray spectroscopy are useful as nondestructive methods to in- vestigate multilayer structures modified by interdiffusion or by chemical reaction of adjoining layers in depth direc- tion. one is the total electron yield (TEY) spectroscopy involving angular dependence measurement. Using this method, it was found that in LiF/Si/LiF trilayers, the Si layers exhibited a characteristic similar to porous Si, and in CaF2/Si/CaF2 trilayers, it was found that CaF2 segregated through the Si layer. moreover, it has been shown that the thickness of the top layer of a mo/Si X-ray multilayer can be determined by analyzing TEY signals generated by the standing wave. The other is the soft X-ray emission spectroscopy involving spectral shape analysis. Using this method, it was found that in mo/Si X-ray multilayers, the interdiffusion or chemical reaction giving rise to deterioration of re- flectance character occurs in as-deposited samples as well as in heated samples. In antiferromagnetic Fe/Si multilay- ers, it was confirmed that there was no existence of pure Si layers, but insulating FeSi2 layers were present. This result suggests that the source of antiferromagnetic coupling is not conduction electrons but quantum wave interference.

关键词：软X射线能谱多层结构景深方向总电子流量驻波硅化合物

Particle size distribution and shape control of Au nanoparticles used for particle gun

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Frontiers of Chemical Science and Engineering 2013年第1期7卷 60-64页

作者： S. Kida m. Ichiji J. watanabe I. Hirasawa Graduate School of Advanced Sciencel Engineering Waseda University Tokyo 169-8555 Japan

Au nanoparticles are expected for the media to transfer genes into plants. However, the control of particle size distribution （PSD） and shape of Au nanoparticles is too difficult to design and prepare particles with suitable quality for the gene supporting media. Reduction crystal- lization experiments were performed in aqueous solution in order to clarify the effect of feeding conditions such as feeding profile, feeding rate, and feeding amount on PSD and shape of Au nanopartieles. Ascorbic acid （AsA） was selected as a reducing agent because it is safe for plants. Au particles of 50nm, 50-200nm, and 150-400nm were obtained in batch operation, single-jet, and double-jet, respectively. moreover, in single-jet and double-jet, the mean size of the obtained Au particles increases with the decrease of feeding rate or the increase of feeding amount. It is concluded that PSD of Au nanoparticles can be controlled in the range of 50-400 nm by changing feeding conditions of AsA and HAuCl4 aqueous solution.

关键词： reduction crystallization particle size distri- bution gene transferring media