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A new strategy for corrosion protection of porous stainless steel using polypyrrole films

Journal of materials Science & Technology 2020年第2期37卷 85-95页

作者： C.garcia-Cabezon C.garcia-Hernandez m.L.Rodriguez-mendez F.martin-Pedrosa materials Engineering E.I.I.Universidad de Valladolid47011 ValladolidSpain UVASENS E.I.I.Universidad de Valladolid47011 ValladolidSpain

In this work,a method to improve the protection against corrosion of porous sintered stainless steel is *** is based on the electrodeposition of polypyrrole(PPy)layers doped with a large size counterion such as dodecylbenzenesulphonic acid(DBSA),a conducting polymer with high corrosion resistance and good *** efficacy of PPy coating depends on the adequate adhesion between the metal substrate and the coating *** protection against corrosion has been tested using 316 L stainless steel(SS)powder sintered at different conditions to evaluate the effect of the sintering atmosphere(nitrogen and vacuum)and cooling rates(furnace and water)on corrosion resistance,while wrought 316 L SS has been used as reference *** addition,two electrochemical deposition techniques have been tested to select the most *** circuit potential evolution,anodic polarization measurements and electrochemical impedance spectra have been used to evaluate corrosion protection in phosphate buffer saline *** has been evidenced that a more homogeneous and stable coating was obtained in the case of porous stainless *** corrosion potential shifted to nobler values and the anodic polarization branch became more *** porous samples have a good passivation performance with a lower stable passive current density and a higher breakdown *** transfer electronic resistance and the impedance module increase more than one order of ***,the porosity of sintered stainless steel is seen as an advantage for the improvement of the adherence of the PPy *** best corrosion protection is found for samples sintered in nitrogen and water-cooled.

关键词： Stainless steel Powder metallurgy Protection corrosion Electrodeposited films Polymer coatings

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Dynamic convergent shock compression initiated by return current in high-intensity laser-solid interactions

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matter and Radiation at Extremes 2024年第4期9卷 40-53页

作者： Long Yang martin Rehwald Thomas Kluge Alejandro Lasogarcia Toma Toncian Karl Zeil Ulrich Schramm Thomas E.Cowan Lingen Huang Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany Technische Universitat Dresden 01062 DresdenGermany

We investigate the dynamics of convergent shock compression in solid cylindrical targets irradiated by an ultrafast relativistic laser *** particle-in-cell simulations and coupled hydrodynamic simulations reveal that the compression process is initiated by both magnetic pressure and surface ablation associated with a strong transient surface return current with density of the order of 10^(17) A/m^(2) and lifetime of 100 *** results show that the dominant compression mechanism is governed by the plasma β,i.e.,the ratio of thermal pressure to magnetic *** targets with small radius and low atomic number Z,the magnetic pressure is the dominant shock compression *** to a scaling law,as the target radius and Z increase,the surface ablation pressure becomes the main mechanism generating convergent ***,an indirect experimental indication of shocked hydrogen compression is provided by optical shadowgraphy measurements of the evolution of the plasma expansion *** results presented here provide a novel basis for the generation of extremely high pressures exceeding Gbar(100 TPa)to enable the investigation of high-pressure physics using femtosecond J-level laser pulses,offering an alternative to nanosecond kJ-laser pulse-driven and pulsed power Z-pinch compression methods.

关键词： shock convergent return

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The Soft X-ray Imager(SXI)on the SmILE mission

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Earth and Planetary Physics 2024年第1期8卷 5-14页

作者： S.Sembay A.L.Alme D.Agnolon T.Arnold A.Beardmore A.Belén Balado margeli C.Bicknell C.Bouldin G.Branduardi-Raymont T.Crawford J.P.Breuer T.Buggey G.Butcher R.Canchal J.A.Carter A.Cheney Y.Collado-Vega H.Connor T.Crawford N.Eaton C.Feldman C.Forsyth T.Frantzen G.Galgóczi J.garcia G.Y.Genov C.Gordillo H-P.Gröbelbauer m.Guedel Y.Guo m.Hailey D.Hall R.Hampson J.Hasiba O.Hetherington A.Holland S-Y.Hsieh m.W.J.Hubbard H.Jeszenszky m.Jones T.Kennedy K.Koch-mehrin S.Kögl S.Krucker K.D.Kuntz C.Lakin G.Laky O.Lylund A.martindale J.miguel mas Hesse R.Nakamura K.Oksavik N.Østgaard H.Ottacher R.Ottensamer C.Pagani S.Parsons P.Patel J.Pearson G.Peikert F.S.Porter T.Pouliantis B.H.Qureshi W.Raab G.Randal A.m.Read N.m.m.Roque m.E.Rostad C.Runciman S.Sachdev A.Samsonov m.Soman D.Sibeck S.Smit J.Søndergaard R.Speight S.Stavland m.Steller TianRan Sun J.Thornhill W.Thomas K.Ullaland B.Walsh D.Walton C.Wang S.Yang School of Physics and Astronomy University of LeicesterLeicesterLE17RHUK Space Park Leicester University of LeicesterLeicesterLE17RHUK mullard Space Science Laboratory University College LondonDorkingRH56NTUK Centre for Electronic Imaging Open UniversityMilton KeynesMK76 AAUK Birkeland Centre for Space Science Department of Physics and TechnologyUniv.of BergenN-5007 BergenNorway University of Vienna A-1010 ViennaAustria Space Research Institute Austrian Academy of SciencesA-8042 GrazAustria National Institute of Aerospace Technology MadridSpain ESTEC European Space Agency2201 AZ NoordwijkNetherlands State Key Laboratory of Space Weather National Space Science CentreBeijing 100190China University of Applied Sciences and Arts Northwestern Switzerland CH-5210 WindischSwitzerland Koegl Space GmbH CH-8157 DielsdorfSwitzerland Space Acoustics GmbH CH-8157 DielsdorfSwitzerland Zurich University of Applied Sciences 8400 WinterhurSwitzerland Genov Solutions N-5172 LoddefjordNorway STm Engineering N-5165 LaksevagNorway John Hopkins University Applied Physics Laboratory MD 20723USA NASA/Goddard Space Flight Centre MD 20771USA Center for Space Physics Boston UniversityBostonMA 02215USA Department of Theoretical Physics and Astrophysics Masaryk University60177 BrnoCzech Republic Institute of Physics E¨otvo¨s Lor´and University1053 BudapestHungary Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100045China Centro de Astrobiologia(CAB) CSIC-INTAMadridSpain

The Soft X-ray Imager(SXI)is part of the scientific payload of the Solar wind magnetosphere Ionosphere Link Explorer(SmILE)*** is a joint science mission between the European Space Agency(ESA)and the Chinese Academy of Sciences(CAS)and is due for launch in *** is a compact X-ray telescope with a wide field-of-view(FOV)capable of encompassing large portions of Earth’s magnetosphere from the vantage point of the SmILE *** is sensitive to the soft X-rays produced by the Solar Wind Charge eXchange(SWCX)process produced when heavy ions of solar wind origin interact with neutral particles in Earth’s *** provides a mechanism for boundary detection within the magnetosphere,such as the position of Earth’s magnetopause,because the solar wind heavy ions have a very low density in regions of closed magnetic field *** sensitivity of the SXI is such that it can potentially track movements of the magnetopause on timescales of a few minutes and the orbit of SmILE will enable such movements to be tracked for segments lasting many *** is led by the University of Leicester in the United Kingdom(UK)with collaborating organisations on hardware,software and science support within the UK,Europe,China and the United States.

关键词： Soft X-ray Imaging micropore optics large area CCD

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On SIR epidemic models with generally distributed infectious periods： Number of secondary cases and probability of infection

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International Journal of Biomathematics 2017年第2期10卷 157-169页

作者： A. Gomez-Corral m. Lopez-garcia Instituto de Ciencias matemdticas CSIC- UAM- UC3M- UCM Calle Nicolds Cabrera 13-15 Madrid 28049 Spain Department of Applied mathematics School of Mathematics University of Leeds Leeds LS29JT UK

Recently, Clancy [SIR epidemic models with general infectious period distribution, Statist. Prob. Left. 85 （2014） 1-5] has shown how SIR epidemics in which individuals＇ infection periods are not necessarily exponentially distributed may be modeled in terms of a piecewise-deterministic markov process （PDmP）. In this paper, we present a more detailed description of the underlying PDmP, from which we analyze the population transmission number and the infection probability of a certain susceptible individual.

关键词： Number of secondary cases piecewise-deterministic markov process proba-bility of infection SIR epidemic model.

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Concordance among pulse wave velocity assessment methods: A network meta-analysis

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中华医学杂志(英文版) 2024年第17期137卷 2137-2139页

作者： Cavero-Redondo Iván Sequí-Domínguez Irene Saz-Lara Alicia garcia-Klepzig Jose Luis Lucerón-Lucas-Torres maribel martínez-García Irene álvarez-Bueno Celia martínez-Vizcaíno Vicente CarVasCare Research Group Facultad de Enfermería de Cuenca Universidad de Castilla-La Mancha Cuenca Spain Facultad de Ciencias de la Salud Universidad Autónoma de Chile Talca Chile Health and Social Research Center Universidad de Castilla-La Mancha Cuenca Spain Internal medicine Department San Carlos University Hospital Madrid Spain Universidad Politécnica y Artística del Paraguay Asunción Paraguay

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Analysis of Growth and Productivity of Green Chickpea Using Nitrogen and Phosphorus Fertilization

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1193-1203页

作者： maricela Apáez-barrios JoséAlberto Salvador Escalante-Estrada Patricio Apáez-barrios Yurixhi Atenea Raya-montaño Juan CarlosÁlvarez-Hernández Facultad de Ciencias Agropecuarias-Universidad michoacana de San Nicolás de Hidalgo Apatzingán60670México Colegio de Postgraduados-Campus montecillo Texcoco56230México Facultad de Agrobiología“Presidente Juárez” Universidad Michoacana de San Nicolás de HidalgoUruapan60190México

Chickpea contains high levels of protein,vitamins and *** chickpea yield is the result of meeting nitrogen and phosphorus *** effect of appropriately meeting such requirements reflects on growth and can easily be evaluated using growth *** research determined:(a)The effect of nitrogen and phosphorus fertilization on phenology,net assimilation rate,number of green leaves,leaf area,leaf area index and leaf area duration;(b)Green chickpea yield and number of pods due to fertilization;and(c)The combination of nitrogen and phosphorus fertilization that yields the most net *** and phosphorus fertilization was evaluated;each at the doses of 0,75 and 150 kg ha–1(N0,N75,N150;P0,P75 and P150,respectively).The combination of the levels of both nutrients generated nine combinations of treatments which were distributed in the field in a randomized complete block design in an arrangement of divided plots with four *** of phenological phases were similar among *** and phosphorus fertilization increased number of leaves,leaf area index,and leaf area duration that translated into increased green chickpea yield(GCY).Combinations N150-P75 and N150-P150 produced the highest *** highest net revenue and revenue per peso invested was obtained with N150-P75.

关键词： Cicer arietinum economic analysis leaf area number of leaves yield

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Phase separation and coarsening of NiAl(β′)intermetallic in quench-aged Fe-Ni-Al alloys

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Journal of Iron and Steel Research International 2020年第11期27卷 1331-1338页

作者： C.Ferreira-Palma J.A.Rosas-barrios V.m.Lopez-Hirata D.I.Rivas-Lopez H.J.Dorantes-Rosales Faculty of Chemical Sciences Universidad VeracruzanaVeracruz 94294Mexico ESIQIE Instituto Politecnico Nacional.UPALMMexico City 07738Mexico

The coarsening behavior of four quench-aged Fe-Ni-AI alloys with different Ni and Al con tents is *** alloys were solubilized at 1100℃for 24 h,water-quenched and aged at 850℃for periods ranging from 1 to 100 h to promote phase separation and *** two alloys with the highest combined Ni and Al contents(>35 at.%)showed signs of spinodal decomposition,while the alloys with lower Ni and Al contents followed a classical nucleation *** Ni and Al contents promoted an increase in NiAl(β′)phase fraction in concordance with phase equilibrium *** alloy with the highest[3'fraction presented a completely interconnected *** coarsening ofβ′particles in the other three alloys followed the predictions of the Lifshitz-Slyozov-Wagner(LSW)*** general trend was an increase in the coarsening kinetics with higher Ni and Al *** highest hardness was found in the alloys with higher fraction albeit these compositions are less resistant to coarsening and have been reported to present a low room-temperature ductility.

关键词： Precipitation Spinodal decomposition Coarsening Aging Fe-Ni-Al alloy

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Unilateral rNurr1-V5 transgene expression in nigral dopaminergic neurons mitigates bilateral neuropathology and behavioral deficits in parkinsonian rats withα-synucleinopathy

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Neural Regeneration Research 2024年第9期19卷 2057-2067页

作者： Bismark Gatica-garcia michael J.Bannon Irma Alicia martínez-Dávila Luis O.Soto-Rojas David Reyes-Corona Lourdes Escobedo minerva maldonado-Berny mE Gutierrez-Castillo Armando J.Espadas-Alvarez manuel A.Fernandez-Parrilla Juan U.mascotte-Cruz CP Rodríguez-Oviedo Irais E.Valenzuela-Arzeta Claudia Luna-Herrera Francisco E.Lopez-Salas Jaime Santoyo-Salazar Daniel martinez-Fong Departamento de Fisiología Biofísica y NeurocienciasCentro de Investigación y de Estudios AvanzadosCiudad de MéxicoMéxico Department of Pharmacology Wayne State University School of MedicineDetroitMIUSA Laboratorio de Patogénesis molecular Carrera Médico CirujanoFacultad de Estudios Superiores IztacalaUniversidad Nacional Autónoma de MéxicoTlalnepantla de BazMéxico Red de medicina para la Educación y Desarrollo y la Investigación Científica de Iztacala(Red mEDICI) Carrera Médico CirujanoFacultad de Estudios Superiores IztacalaUniversidad Nacional Autónoma de MéxicoTlalnepantla de BazMéxico Nanoparticle Therapy Institute AguascalientesMéxico Departamento de Biociencias e Ingeniería Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y DesarrolloInstituto Politécnico NacionalCiudad de MéxicoMéxico Escuela Nacional de medicina y Homeopatía Instituto Politécnico NacionalCiudad de MéxicoMéxico Departamento de Fisiología Escuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalCiudad de MéxicoMéxico Departamento de Biología molecular y Biotecnología Instituto de Investigaciones BiomédicasUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMéxico Departamento de Física Centro de Investigación y de Estudios AvanzadosCiudad de MéxicoMéxico Programa de Nanociencias y Nanotecnología Centro de Investigación y de Estudios AvanzadosCiudad de MéxicoMéxico

Parkinsonism by unilateral,intranigralβ-sitosterolβ-D-glucoside administration in rats is distinguished in that theα-synuclein insult begins unilaterally but spreads bilaterally and increases in severity over time,thus replicating several clinical features of Parkinson’s disease,a typicalα-*** Nurr1 repressesα-synuclein,we evaluated whether unilateral transfected of rNurr1-V5 transgene via neurotensin-polyplex to the substantia nigra on day 30 after unilateralβ-sitosterolβ-D-glucoside lesion could affect bilateral neuropathology and sensorimotor deficits on day 30 *** study found that rNurr1-V5 expression but not that of the green fluorescent protein(the negative control)reducedβ-sitosterolβ-D-glucoside-induced ***,a bilateral increase in tyrosine hydroxylase-positive cells and arborization occurred in the substantia nigra and increased tyrosine hydroxylase-positive ramifications in the *** addition,tyrosine hydroxylase-positive cells displayed less senescence markerβ-galactosidase and more neuron-cytoskeleton markerβIII-tubulin and brain-derived neurotrophic factor.A significant decrease in activated microglia(positive to ionized calcium-binding adaptor molecule 1)and neurotoxic astrocytes(positive to glial fibrillary acidic protein and complement component 3)and increased neurotrophic astrocytes(positive to glial fibrillary acidic protein and S100 calcium-binding protein A10)also occurred in the substantia *** effects followed the bilateral reduction inα-synuclein aggregates in the nigrostriatal system,improving sensorimotor *** results show that unilateral rNurr1-V5 transgene expression in nigral dopaminergic neurons mitigates bilateral neurodegeneration(senescence and loss of neuron-cytoskeleton and tyrosine hydroxylase-positive cells),neuroinflammation(activated microglia,neurotoxic astrocytes),α-synuclein aggregation,and sensorimotor *** neurotrophic astrocytes and

关键词： A1 astrocytes A2 astrocytes gene therapy microglia motor deficits nanoparticles neurodegeneration neuroinflammation senescence α-synuclein aggregates

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A Single JAZ Repressor Controls the Jasmonate Pathway in marchantia polymorpha

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molecular Plant 2019年第2期12卷 185-198页

作者： Isabel monte Jose m. Franco-Zorrilla Gloria garcia-Casado Angel m. Zamarreno Jose m. garcia-mina Ryuichi Nishihama Takayuki Kohchi Roberto Solano Department of Plant molecular Genetics Centro Nacional de Biotecnologia Consejo Superior de Investigaciones Cientificas (CNB-CSIC) 28049 Madrid Spain Genomics Unit Centro Nacional de Biotecnologia Consejo Superior de Investigaciones Cientificas (CNB-CSIC) 28049 Madrid Spain Environmental Biology Department University of Navarra Navarre Spain Graduate School of Biostudies Kyoto University Kyoto 606-8502 Japan

JAZ proteins are negative regulators of jasm onate responses,acting both as repressors of transcription factors and as co-receptors of JA-lle. The high redundancy of JAZ genes in angiosperms has hindered the characterization of a complete depletion of JAZ function. moreover, the recent discovery that dn- OPDA is the jasmonate ligand in marchantia polymorpha demonstrates that JA-lle is not the sole COI1/ JAZ ligand in land plants and highlights the importance of studying JAZ co-receptors in bryophytes? Here, we have exploited the low gene redundancy of the liverwort m. polymorpha to characterize the single mpJ4Z in this early diverging plant lineage. We clarify the phylogenetic history of the TIFY family, demonstrate that mpJAZ is the ortholog of AtJAZ with a conserved function, and characterize its repressor activity of dn-OPDA resp on ses. Our results show that, con sistent with previous findings in Arabidopsis, mpJAZ represses jasmonates biosynthesis, senescence, and plant defenses, and promotes cell growth and reproductive fitness, highlighting the power of studies in marchantia.

关键词： Jasmonate repressors marchantia Hormone signaling evolution gene redundancy

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Design of multilayer hybrid sol-gel coatings with bifunctional barrier-bioactive response on the Elektron 21 magnesium alloy for biomedical applications

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Journal of magnesium and Alloys 2021年第6期9卷 2097-2112页

作者： K.S.Durán N.Hernández L.m.Rueda C.A.Hernández-barrios A.E.Coy F.Viejo Grupo de Investigación en Desarrollo y Tecnología de Nuevos materiales(GImAT) Universidad Industrial de Santander9 Cra.27Colombia Grupo de Investigación de las Ciencias de las Ingenierías(GICI) Universidad de San BuenaventuraCartagenaCalle Real de TerneraDiagonal 32#30-966Colombia

The present study aims to develop multilayer barrier-bioactive hybrid sol-gel coatings from a mixture of the silane precursors tetraethylorthosilicate(TEOS)and glycidoxypropyltriethoxysilane(GPTmS)deposited on the Elektron 21 magnesium *** purpose of the inner layer(barrier coating)was to provide corrosion protection to the magnesium alloy,whereas the outer layer(bioactive coating)was doped with different Ca and mg contents to produce a bioactive *** coatings were characterised using scanning electron microscopy(SEm)and their corrosion behaviour was evaluated by anodic polarisation and electrochemical impedance spectroscopy after immersion in simulated body fluid(SBF)at 37±0.5°*** experimental results showed that the multilayer coatings increased the corrosion resistance of the alloy up to three orders of magnitude during immersion in SBF *** the other hand,the presence of Ca and mg in the bioactive coating promoted the growth of apatite-like ***,an increment of salt content favoured the formation of porous coatings,which allowed the access of the electrolyte to the substrate leading to their rapid *** the latter,this research endorses the premise that the TEOS-GPTmS hybrid system represents a promising alternative to produce bifunctional barrier-bioactive coatings.

关键词： magnesium bioactivity coating sol-gel EIS corrosion

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