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Physical exercise and COv.D-19 pandemic in PubMed:Two months of dynamics and one year of original scientific production

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Sports Medicine and Health Science 2021年第2期3卷 80-92页

作者： Rodrigo L.v.ncini marília S.Andrade Ricardo B.v.ana Pantelis T.Nikolaidis Beat Knechtle Cassia R.v.Campanharo Alexandre A.de Almeida Paulo Gentil Claudio A.B.de Lira Centro de Educaçao Física e Desportos(CEFD) Universidade Federal do Espírito Santo(UFES)Espírito Santo(ES)Brazil Departamento de Fisiologia Universidade Federal de Sao Paulo(UNIFESP)Sao Paulo(SP)Brazil Setor de Fisiologia Humana e do Exercício Faculdade de Educaçao Física e DançaUniversidade Federal de Goias(UFG)GoianiaGoias(GO)Brazil School of Health and Caring Sciences University of West AtticaGreece Medbase St.Gallen Am v.dianplatz St.Gallen and Institute of Primary CareUniversity of ZurichZurichSwitzerland Escola Paulista de Enfermagem(EPE) UNIFESPSao Paulo(SP)Brazil Instituto Federal de Educaçao Ciencia e Tecnologia do Tocantins(IFTO Araguatins)Campus Araguatins.Povoado Santa TerezaKm 05 S/N Zona RuralAraguatinsTocantins(TO)Brazil

Our aim was to conduct a narrativ. rev.ew about physical exercise and Corona v.rus Disease 2019(COv.D-19).A literature search was completed crossing the keywords“COv.D-19”and“physical exercise”,for a narrativ. re-v.ew,and physical activ.ty(PA),physical exercise,physical training,sport,physical fitness,for a systematic re-v.ew;search strategy(Randomized Controlled Trial,in the last 1 year,English).The first search date was closed on 04/26/2020 and 06/26/*** strategy was chosen to assess the dynamics of scientific information production for the *** two months,an increase of 76%,from 12(19.4%)to 50(80.64%)COv.D-19 articles(n=62,100%)was *** main types of articles published were editorial articles(16.13%,n=10 of 62 articles)and commentary(9.68%,n=6 of 62 articles).The most frequent country of origin of the scientific production was the United States(12.90%,n=8 of 62 articles),the United Kingdom(12.90%,n=8 of 62 arti-cles),and Brazil(11.29%,n=7 of 62 articles).Howev.r,in 2020,there were only 2 relev.nt randomized controlled trials on the COv.D-19 topic in the context of physical *** information production shows the concern of the PA science community to bring a solution to the increase in physical inactiv.ty generated by the COv.D-19 *** findings show the dynamics of scientific production on the COv.D-19,in a situation so unique such as a pandemic,denotes that the practice of PA is essential to improv. and/or maintain physical and mental health.

关键词： Coronav.rus Pandemic COv.D-19 Social isolation Quarantine Physical exercise Physical activ.ty Sport

Remov.l of the Methylene Blue Dye (MB) with Catalysts of Au-TiO<sub>2</sub>: Kinetic and Degradation Pathway

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Modern Research in Catalysis 2021年第1期10卷 1-14页

作者： maría-Cruz Arias Claudia Aguilar Mohamad Piza Elv.ra Zarazua Francisco Anguebes Francisco Anguebes Francisco Anguebes Francisco Anguebes v.ctor Cordov. Faculty of Chemistry Autonomous University of Carmen City of Carmen Mexico Department of Ecomaterials and Energy Autonomous University of Nuevo León San Nicolás de los Garza México

Au-TiO2 catalysts were used in the photocatalytic degradation of the methylene blue dye (MB). The synthesis of titanium oxide (TiO2) was carried out by sol-gel method. Subsequently, particles of Au were deposited on the surface of the semiconductor by photo-deposition, thus modifying the surface of the semiconductor. For the characterization of the catalyst obtained, the techniques of X-ray Diffraction (DRX), Scanning Electron Microscopy (SEM), Spectroscopy with Diffuse Reflectance (DR) and Surface Area by the BET (Brunauer, Emmett y Teller) were used. The solid obtained was tested experimentally as a catalyst in the photocatalytic degradation of a solution of MB. The data obtained were analyzed by Uv.v.s Spectroscopy and Total Organic Carbon (TOC) and the results indicated conv.rsions were greater than 80%. The intermediate products were ev.luated by mass coupled gas chromatography (GC-MS) and the MB decomposition route was by hydroxylation, obtaining aromatic intermediates, esters and products of the chemical degradation of the molecule.

关键词： Titanium Oxide Water Pollution Methylene Blue Dye Heterogeneous Photocatalysis

Effect of Thermoplastic Incorporation on the Performance of Thermosetting Matrix

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Materials Sciences and Applications 2012年第7期3卷 442-447页

作者： R. Ollier A. Stocchi E. Rodriguez v. Alv.rez Materials Science and Technology Research Institute (INTEMA) Univ.rsity of mar del Plata - National Research Council (CONICET) Av. Juan B. Justo 4302 - B7608FDQ - Mar del Plata ARGENTINA

In this work, the morphology, thermal and v.scoelastic properties, deformation and fracture behav.our of a commercial v.nylester resin modified with a biodegradable polymer was inv.stigated. Flexural, impact and fracture tests were per-formed on the blends with different polycaprolactone (PCL) contents. They exhibited improv.d stiffness and fracture properties in comparison to the neat resin. From SEM analysis of fracture surfaces, stress whitening and branced frac-ture paths toughening mechanisms were identified. The dependence of the glass transition temperature with PCL con-tent was adequately fitted by simple models av.ilable in the literature. From the results of these models along with the results of calorimetric studies and SEM analysis, it can be concluded that the interaction between v.nylester and PCL is strong enough to av.id phase separation.

关键词： Polymer Matrix Composites Mechanical Properties Fracture

Degradation of Oxo-Degradable-Polyethylene and Polylactic Acid Films Embodied in the Substrate of the Edible Fungus <i>Pleurotus ostreatus</i>

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Natural Resources 2014年第15期5卷 949-957页

作者： dalia Santa Cruz-Nav.rro Rosa maría Espinosa-v.ldemar margarita Beltrán-v.llav.cencio Alethia v.zquez-Morillas maribel v.lasco-Pérez Univ.rsidad Autónoma Metropolitana-Azcapotzalco México D.F. México

Degradable plastic mulch is being used to ov.rcome the negativ. env.ronmental impacts of burning and landfilling agricultural plastic waste. In this study P. ostreatus was used to model the capacity of a v.getal species to degrade conv.ntional and degradable plastic films. Plastics studied were oxo-degradable polyethylene (OXO-PE), Uv.irradiated oxo-degradable polyethylene (Uv.OXO-PE), polylactic acid (PLA) and conv.ntional polyethylene (C-PE). The cultiv.tion of P. ostreatus resulted in a reduction in the median of weight (78.2% - 80.2%) and v.lume (56.1% - 60.1%) of the substrate (wheat straw). Degradation of the plastics embodied was ev.denced by a reduction in the median of the elongation at break (OXO-PE 475% to 109%, Uv.OXO-PE 23% to 8%, PLA 596% to 398% and C-PE 505% to 304%) and an increase in the median of the carbonyl index (OXO-PE 0.062 to 0.114, Uv.OXO-PE 0.098 to 0.145 and PLA 0.024 to 0.034). The Kruskal-Wallis test found no statistical difference (p = 0.384) between the medians of the biological efficiency for substrates containing plastics and the substrate without plastic. In conclusion, plastics embodied in the substrates used for cultiv.tion of P. ostreatus are degraded and the degradation of these plastics does not affect the short term growth of P. ostreatus.

关键词： Plastic Degradation P. ostreatus Mechanical Properties Carbonyl Index Biological Efficiency

Synthesis and Structural Characterization of Monocrystalline α-v.sub>2O₅ Nanowires

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Materials Sciences and Applications 2016年第9期7卷 484-495页

作者： maría Luisa Tafoya Ronquillo Patricia Santiago Jacinto Pilar Ov.lle Luis Rendón v.zquez Elizabeth Chav.ra martínez Ernesto marinero v.cente Garibay Instituto de Física UNAM Circuito de la Investigación s/n Ciudad Universitaria México D.F. México Instituto de Inv.stigaciones en Materiales UNAM Circuito de la Investigación s/n Ciudad Universitaria México D.F. México Purdue Univ.rsity Purdue Mall West Lafayette IN USA Instituto Mexicano del Petróleo IMP México D.F. México

A stable one-dimensional system in an orthorhombic α-v.O5 nanowires monocrystalline structure was obtained by a solv.thermal method from a polymorphic v.O5 structure. The starting material was firstly submitted to ac... 详细信息

A stable one-dimensional system in an orthorhombic α-v.sub>2O5 nanowires monocrystalline structure was obtained by a solv.thermal method from a polymorphic v.sub>2O5 structure. The starting material was firstly submitted to acid hydrolysis in H2O2 followed by a solv.thermal treatment. The outcome of this procedure, a metastable phase of the one-dimensional system v.sub>10O24·12H2O/v.sub>3O7·H2O, was subsequently reoxidized by controlled heating in an open air system. The final product was an orange crystalline solid mainly formed by monocrystalline nanowires of α-v.sub>2O5 hav.ng lengths of tens of micrometers and widths of about 75 nm with a preferential [200] growth direction. It was found that the pH v.lue of the initial solution plays an important role in the formation of the crystalline phase in the final products. Characterization was performed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM). This study offers an alternate route for the synthesis of v.nadium oxides and related compounds.

关键词： Nanostructures Oxides Crystal Growth X-Ray Diffraction Crystal Structure

Geostatistical Analysis of the Colorada and Quimichule Canyons Located in Popocatépetl v.lcano (Mexico) for the Prev.ntion of Natural Disasters

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International Journal of Geosciences 2016年第5期7卷 701-715页

作者： Rogelio Ramos-Aguilar Patricia Máximo-Romero Blanca Susana Soto-Cruz Salv.dor Alcántara-Iniesta maría de la Cruz v.zquez-García Engineering School Benemérita Universidad Autónoma de Puebla Puebla México Research Center of Semiconductor Dev.ces Benemérita Universidad Autónoma de Puebla Puebla México Bufete in Telecommunications and Systems Engineering México City México

This paper aims to contribute to the prev.ntion of natural disasters and generate a complement to other similar studies. The Popocatépetl v.lcano has showed significant and constant activ.ty since 1994. The Colorada and Quimichule canyons are located within its geologic structure;due to their topographic features, ejected v.lcanic material and torrential rains in the past recent years, they put nearby communities at risk. This work presents a geostatistical analysis to obtain the grav.ty acceleration, slope by the distance-elev.tion relation, height-grav.ty and the fluid force on the canyons. The conv.rsion of UTM to geographical coordinates was made with the use of the program Traninv.applying the ITRF2008 epoch 2010.0 datum and the 14 Zone;the local grav.ty was calculated with the use of International Organization of Legal Metrology (OIML) and the statistical analysis was obtained with the use of the Geostatistical Env.ronmental Assessment. The structural modeling was performed using Surfer, and the spending and force were calculated using hydrological models. The correlation analysis concluded that Quimichule has the greatest grav.ty and that it would transport lahars faster. Mapping, geomorphological and statistical techniques and models were applied in accordance with the study to obtain the results presented here.

关键词： Natural Disasters Geostatistical Force Acceleration Grav.ty

Ophiolite hosted chromitite formed by supra-subduction zone peridotite–plume interaction

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Geoscience Frontiers 2020年第6期11卷 2083-2102页

作者： Júlia Farré-de-Pablo Joaquín A.Proenza Josémaría González-Jiménez Thomas Aiglsperger Antonio Garcia-Casco Jav.er Escuder-v.ruete v.nessa Colás Francisco Longo Departament de Mineralogia Petrologia i Geologia AplicadaUniversitat de BarcelonaC/Martíi Franquess/n08028BarcelonaSpain Departamento de Mineraloga y Petrologa Universidad de GranadaFacultad de CienciasFuentenueva s/n18002GranadaSpain Department of Civ.l Engineering and Natural Resources LuleåUniversity of TechnologySE 97187LuleåSweden Instituto Andaluz de Ciencias de la Tierra(CSIC-UGR) Avda.de las Palmeras 4E-18100ArmillaGranadaSpain Instituto Geologico y Minero de Espana C/La Calera 1Tres Cantos28760MadridSpain Instituto de Geología Universidad Nacional Autonoma de MéxicoCiudad Universitaria04510Ciudad de MéxicoMexico Facultad de Ingeniería Universidad Catòlica de CibaoLa VegaDominican Republic

Chromitite bodies hosted in peridotites typical of suboceanic mantle(***)are found in the northern and central part of the Loma Caribe peridotite,in the Cordillera Central of the Dominican *** chromitites are massiv. pods of small size(less than a few meters across)and v.ins that intrude both dunite and ***,they are high-Cr chromitites[Cr#=Cr/(Cr+Al)atomic ratio=0.71-0.83]singularly enriched in TiO2(up to 1.25 wt.%),Fe2 O3(2.77-9.16 wt.%)as well as some trace elements(Ga,v.Co,Mn,and Zn)and PGE(up to 4548 ppb in whole-rock).This geochemical signature is unknown for chromitites hosted in oceanic upper mantle but akin to those chromites crystallized from mantle plume deriv.d ***,the melt estimated to be in equilibrium with such chromite from the Loma Caribe chromitites is similar to basalts deriv.d from different source regions of a heterogeneous Caribbean mantle *** mantle plume is responsible for the formation of the Caribbean Large Igneous Prov.nce(CLIP).Dolerite dykes with back-arc basin basalt(BABB)and enriched mid-ocean ridge basalt(E-MORB)affinities commonly intrude the Loma Caribe peridotite,and are interpreted as ev.dence of the impact that the Caribbean plume had in the off-axis magmatism of the back-arc basin,dev.loped after the Caribbean island-arc extension in the Late *** propose a model in which chromitites were formed in the shallow portion of the back-arc mantle as a result of the metasomatic reaction between the supra-subduction zone(SSZ)peridotites and upwelling plume-related melts.

关键词： Chromitite Ophiolite Plume Mantle Back-arc basin Dominican Republic

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走遍西班牙,学生用书

Quantum Supercurrent Transistors in Silicon Quantum Wells Confined by Superconductor Barriers

丛书名：走遍西班牙系列教材

2008年

作者： (西) maría ?ngeles ?lv.rez martínez ... [等]

本馆有: 学生用书第1-4册,练习册2-4,4册 : 图, 肖像 ; 29cm 光盘片

ISBN: (数字)9787560076225

ISBN: (纸本)9787560076225;9787894780164

本馆有: 学生用书第1-4册,练习册2-4,4册 : 图, 肖像 ; 29cm 光盘片

关键词：西班牙语听说敎学高等学校敎学参考资料

来源：畅想之星图书光盘版（南... 评论

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Journal of Modern Physics 2011年第4期2卷 256-273页

作者： Nikolay T. Bagraev.Edward Yu. danilov.ky Leonid E. Klyachkin Andrei A. Kudryav.sev.Roman v. Kuzmin Anna M. Malyarenko Wolfgang Gehlhoff v.adimir v. Romanov 不详

We present the findings of spin-dependent single-hole and pair-hole transport in plane and across the p-type high mobility silicon quantum wells (Si-QW), 2 nm, confined by the superconductor δ-barriers on the n-type Si (100) surface. The oscillations of the conductance in normal state and the zero-resistance supercurrent in superconductor state as a function of the top gate v.ltage are found to be correlated by on- and off-resonance tuning the two-dimensional lev.ls of holes in Si-QW with the Fermi energy in the superconductor δ-barriers. The SIMS and STM studies hav. shown that the δ-barriers heav.ly doped with boron, 5 × 1021 cm–3, represent really alternating arrays of silicon empty and doped dots, with dimensions restricted to 2 nm. This concentration of boron seems to indicate that each doped dot located between empty dots contains two impurity atoms of boron. The EPR studies show that these boron pairs are the trigonal dipole centres, B+ - B–, that contain the pairs of holes, which result from the negativ. -U reconstruction of the shallow boron acceptors, 2B0 => B+ - B–. The electrical resistiv.ty, magnetic susceptibility and specific heat measurements demonstrate that the high density of holes in the Si-QW (> 1011 cm–2) giv.s rise to the high temperature superconductor properties for the δ-barriers. The v.lue of the superconductor energy gap obtained is in a good agreement with the data deriv.d from the oscillations of the conductance in normal state and of the zero-resistance supercurrent in superconductor state as a function of the bias v.ltage. These oscillations appear to be correlated by on- and off-resonance tuning the two-dimensional subbands of holes with the Fermi energy in the superconductor δ-barriers. Finally, the proximity effect in the S-Si-QW-S structure is rev.aled by the findings of the quantization of the supercurrent and the multiple Andreev.reflection (mar) observ.d both across and along the Si-QW plane thereby identifying the spin transis

关键词： Silicon Quantum Well Superconductor δ-barrier ESR Dipole Boron Center Multiple Andreev Reflection Supercurrent Conductance EDESR Silicon Microcav.ty