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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-her.andez 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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Identifying key elements in Knowledge-cities benchmarking

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学术界 2010年第3期 241-248页

作者： Blanca c.garcia Northern Borderlands Research college

This paper presentation explores four key aspects of the Identity capital existing in emerging cities and *** aspects are part of capital systems approaches such as the Generic System of capitals （GcS）:a tool to benchmark how cities are leveraging their capacity for knowledge-based *** this opportunity,elements of GSc’s Identity capital have been emphasized to observe a combination of clarity and differentiation aspects of a city identity in four distinct *** context-based identity seemingly illustrates how knowledge cities in the edge are building their identity advantage in the knowledge-based international arena.

关键词： Generic capitals System Identity capital Benchmarking Borderland Knowledge cities

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Improvements in tribological and anticorrosion performance of porous Ti–6Al–4V via PEO coating

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Friction 2021年第5期9卷 1303-1318页

作者： c.garcia-cabezón M.L.Rodríguez-Méndez V.AmigóBorrás R.Bayón c.Salvo-comino c.garcia-her.andez F.Martin-Pedrosa Materials Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain BioecoUVA Research Institute Universidad de ValladolidValladolid 47011Spain Group UVASENS Escuela de Ingenierías IndustrialesUniversidad de ValladolidValladolid 47011Spain Instituto de Tecnología de Materials Univesitat Politécnica de ValenciaValencia 46022Spain Tribology Unit Fundación IK4-TeknikerEibar 20600Spain

Medical implants manufactured using biomaterial Ti–6Al–4V exhibit some *** higher elastic modulus than that of natural bone can cause stress shielding *** can be avoided using Ti–6Al–4V with pores in the implant ***,poor corrosion and tribocorrosion behaviors are yielded because of the large area exposed to the *** mitigate both issues,coating technologies can be *** plasma electrolytic oxidation(PEO)process is a cost‐effective process that has been used successfully in nonporous Ti *** this study,two PEO coatings with different amounts of ca/P are ***,reports regarding their application in porous materials are *** effects of PEO treatments on corrosion and tribocorrosion in Ti–6Al–4V powder metallurgy are analyzed *** porous materials provide an efficient surface for PEO coatings,as demonstrated via scanning electron microscopy(SEM)and atomic force microscopy(AFM),and the porosity of the substrates improved the adherence of the *** corrosion resistance measured via electrochemical impedance spectroscopy confirmed the beneficial effect of the coatings,particularly for long exposure *** lower roughness,small pore size,and more compact film observed in the PEO–ca/P sample resulted in favorable tribological and corrosion properties.

关键词： Ti‐based alloys corrosion tribocorrosion surface modification

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chemical-Structural changes of Organic Matter in a Semi-Arid Soil After Organic Amendment

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Pedosphere 2012年第3期22卷 283-293页

作者： c.NIcOLS G.MAScIANDARO T.herNNDEZ c.garcia centro de Edafología y Biología Aplicada del Segura (cEBAS-cSIc) Department of Soil and Water Conservation and Organic Wastes ManagementCampus Universitario de EspinardoP.O.160Murcia 3010 (Spain) consiglio Nazionale delle Ricerche (cNR) Istituto per lo Studio degli Ecosistemi (ISE)-Sezione di Chimica del SuoloArea della RicercaVia Moruzzi 1Pisa 56124 (Italy)

A 9-month incubation experiment using composted and non-composted amendments derived from vine pruning waste and sewage sludge was carried out to study the effects of the nature and stability of organic amendments on the structural composition of organic matter (OM) in a semi-arid *** changes of soil OM,both in the whole soil and in the extractable carbon with pyrophosphate,were evaluated by pyrolysis-gas chromatography and chemical *** the end of the experiment,the soils amended with pruning waste exhibited less organic carbon loss than those receiving sewage *** non-composted residues increased the aliphatic-pyrolytic products of the OM,both in the whole soil and also in the pyrophosphate extract,with the products derived from peptides and proteins being significantly *** 9 months,in the soils amended with pruning waste the relative abundance of phenolic-pyrolytic products derived from phenolic compounds,lignin and proteins in the whole soil tended to increase more than those in the soils amended with sewage ***,the extractable OM with pyrophosphate in the soils amended with composted residues tended to have higher contents of these phenolic-pyrolytic products than that in non-composted ***,despite the stability of pruning waste,the composting of this material promoted the incorporation of phenolic compounds to the soil *** pyrolytic indices (furfural/pyrrole and aliphatic/aromatic ratios) showed the diminution of aliphatic compounds and the increase of aromatic compounds,indicating the stabilization of the OM in the amended soils after 9 *** conclusion,the changes of soil OM depend on the nature and stability of the organic amendments,with composted vine pruning waste favouring humification.

关键词： degraded soil pyrolysis-gas chromatography pyrophosphate extract sewage sludge vine pruning waste

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Tracing changes in the Microbial community of a Hydrocarbon-Polluted Soil by culture-Dependent Proteomics

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Pedosphere 2010年第4期20卷 479-485页

作者： F.BASTIDA c.NIcOLS J.L.MORENO T.herNNDEZ c.garcia Department of Soil and Water conservation Centro de Edafologia y Biologia Aplicada del Segura(CEBAS-CSIC)Campus Universitario de Espinardo

Hydrocarbon contamination may affect the soil microbial community, in terms of both diversity and function. A laboratory experiment was set-up, with a semi-arid control soil and the same soil but artificially contaminated with diesel oil, to follow changes in the dominant species of the microbial community in the hydrocarbon-polluted soil via proteomics. Analysis of the proteins extracted from enriched cultures growing in Luria-Bertani （LB） media showed a change in the microbial community. The majority of the proteins were related to gIycolysis pathways, structural or protein synthesis. The results showed a relative increase in the complexity of the soil microbial community with hydrocarbon contamination, especially after 15 days of incubation. Species such as Ralstonia solanacearum, Synechococcus elongatus and different clostridium sp. were adapted to contamination, not appearing in the control soil, although Bacillus sp. dominated the growing in LB in any of the treatments. We conclude that the identification of microbial species in soil extracts by culture-dependent proteomics is able to partially explain the changes in the diversity of the soil microbial community in hydrocarbon polluted semi-arid soils, but this information is much more limited than that provided by molecular methods.

关键词： culture dependent hydrocarbon contamination microbial diversity proteomics semiarid soil

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charmed hadrons in nuclear medium

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chinese Physics c 2010年第9期34卷 1335-1338页

作者： L.Tolos D.Gamermann c.garcia-Recio R.Molina J.Nieves E.Oset A.Ramos Theory Group.KVI.University of Groningen Instituto de Física corpuscular (centro mixto cSIc-UV Institutos de Investigación de Paterna Aptdo.2208546071ValenciaSpain) Departamento de Física Atómica Molecular y NuclearUniversidad de Granada Departament d'Estructura i constituents de la Matèria Universitat de Barcelona

We study the properties of charmed hadrons in dense matter within a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent *** analyze the behaviour in this dense environment of dynamically-generated baryonic resonances as well as the open-charm meson spectral *** discuss the implications of the in-medium properties of open-charm mesons on the D s0 （2317） and the predicted X（3700） scalar resonances.

关键词： open-charm mesons spectral function dynamically-generated baryonic resonances charmed and hidden charmed scalar resonances

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challenges and improvement strategies in the hospitalization of chronic multimorbid patients

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World Journal of clinical cases 2025年第3期13卷 35-41页

作者： Andres Fontalba-Navas Francisco Pozo Muñoz Rogelio garcia cisneros Maria Jose garcia Larrosa Maria del Mar callejon Gil Ignacio garcia Delgado Maria Belen Jimenez Martinez Antequera Hospital Northern Málaga Integrated Healthcare AreaAntequera 29200AndalusiaSpain Department of Public Health and Psychiatry University of MálagaMálaga 29010Spain Antequera Hospital Northern Málaga Antequera Integrated Healthcare AreaAntequera 29200MálagaSpain

BAcKGROUND Addressing the growing challenge of hospitalizing chronic multimorbid patients,this study examines the strain these conditions impose on healthcare systems at a local level,focusing on a pilot *** diseases and complex patients require comprehensive management strategies to reduce healthcare burdens and improve patient *** proven effective,this pilot model has the potential to be replicated in other healthcare settings to enhance the management of chronic multimorbid *** To evaluate the effectiveness of the high complexity unit(HcU)in managing chronic multimorbid patients through a multidisciplinary care model and to compare it with standard hospital *** The study employed a descriptive longitudinal approach,analyzing data from the Basic Minimum Data Set(BMDS)to compare hospitalization variables among the HcU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HcU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** The study employed a descriptive longitudinal approach,analyzing data from the BMDS to compare hospitalization variables among the HcU,the Internal Medicine Service,and other services at Antequera Hospital throughout *** HcU,designed for patients with complex chronic conditions,integrates a patient-centered model emphasizing multidisciplinary care and continuity *** This study demonstrates the effectiveness of the HcU in managing patients with complex chronic diseases through a multidisciplinary *** coordinated care provided by the HcU results in improved patient outcomes,reduced unnecessary hospitalizations,and better management of patient *** superiority of the HcU compared to standard care is evident in key outcomes such as fewer readmissions and higher patient satisfaction,reinforcing its value as a model of ca

关键词： High complexity unit chronic multimorbidity Patient-centered care Integrated care Healthcare management

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Fracture energy evaluation on 7075-T651 aluminum alloy welds determined by instrumented impact pendulum

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Transactions of Nonferrous Metals Society of china 2016年第4期26卷 974-983页

作者： R.R.AMBRIZ D.JARAMILLO c.garcia F.F.cURIEL Instituto Politécnico Nacional cIITEc-IPN Cerrada de Cecati S/N Col.Sta.Catarina C.P 02250AzcapotzalcaDFMexico Mechanical and Aerospace Engineering Carleton University1125 Colonel By DriveOttawaONK1S 5B6Canada Universidad Autónoma de coahuila(UAdec) Facultad de MetalurgiaCarr 57Km 5MonclovaCoahuilaMexico

By using an instrumented impact pendulum, the force versus time curves of 7075-T651 aluminum welds were obtained from standard charpy-V samples. considering the force-time curves and constant impact velocity, the fracture energies for different zones were quantified. A fracture energy improvement for the HAZ(33.6 J) was observed in comparison with the weld metal(7.88 J), and base metal(5.37 J and 7.37 J for longitudinal and transverse directions, respectively). This toughness increment was attributed to the microstructural transformation caused by the thermodynamic instability of η′ precipitates during the welding. Fracture energy for weld metal was higher than that for base metal, probably due to pores created during solidification. Regarding the dynamic yielding force obtained from the force-time curves, an approximation to the dynamic yield strength for weld, HAZ and base metal was determined. Fracture surfaces revealed an intergranular failure for base metal in longitudinal direction, whereas a predominately brittle failure(cleavage) with some insights of ductile characteristics was observed for the transverse direction. In contrast, a ductile failure was observed for weld metal and HAZ.

关键词： 7075-T651 welded joint instrumented charpy pendulum force-time curve fracture energy dynamic yield strength

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Novel proteomics method reveals an atypical hyperacidic Grp78/Bip isoform upregulated by treatment with TLR2 agonists or bacterial infection in THP-1 cells without endoplasmic reticulum stress and apoptosis

Novel proteomics method reveals an atypical hyperacidic Grp7...

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中国生物化学与分子生物学会第十届会员代表大会暨全国学术会议

作者： Lijun Tang cristian J.A.Asensio Rodolfo c.garcia Molecular Biology Research center School of Biological Science and TechnologyCentral South University

TLRs are pattern recognition receptors that act as primary sensors of microbial *** are now 10 TLRs identified in humans,found in both the innate and the adaptive immune system,where they play a pivotal role in the response directed against distinct,structurally conserved components of ***-1 macrophage-like cells were infected with Mycobacterium avium,Borrelia burgdorferi or heat-killed ***,or treated with agonists of TLR2 and TLR4 for different *** screened for proteome differences induced by the different agents by comparing with untreated cells after protein *** of the up-regulated phosphorylated proteins after infection or treatment with TLR2 agonists was identified as a novel

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corrosion behavior of hypoeutectic Al-cu alloys in H_2SO_4 and Nacl solutions

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 241-246页

作者： Wislei R.Osório Leandro c.Peixoto Leonardo R.garcia Amauri garcia Department of Materials Engineering University of Campinas-UNICAMP

The aim of this work was to evaluate the electrochemical behaviour of hypoeutectic Al-cu alloys immersed in two different solutions containing sulphate and chloride ions, respectively. The influence of Al2cu associated to the dendritic arm spacing on the general corrosion resistance of such alloys is analysed. The typical microstructural pattern was examined by using scanning electron microscope. The corrosion tests were performed in both 0.5 M sulphuric acid and 0.5 M Nacl solutions at 25℃ by using an electrochemical impedance spectroscopy （EIS） technique and potentiodynamic polarization curves. Equivalent circuits by using the ZView software, were also used to provide quantitative support for the discussions. It was found that as the cu content increased （i.e., increasing the Al2cu fraction）, a higher susceptibility to the corrosion action in the Nacl solution is detected. In contrast, the tests carried out in the H2SO4 solution resulted in similar corrosion,rates for the three different hypoeutectic alloys.

关键词： Al-cu alloys Al2cu corrosion Microstructure castings

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