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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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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-Hernandez 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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fGfR3 alterations in bladder cancer:Sensitivity and resistance to targeted therapies

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Cancer Communications 2024年第10期44卷 1189-1208页

作者： Maxim Noeraparast Katarina Krajina Renate Pichler Dora Nieders-Beke Shahrokh f Shariat Viktor Grünwald Sascha Ahyai martin Pichler Translational Oncology II.Med Clinics Hematology and OncologyAugsburgGermany Department of Urology Medical University of InnsbruckInnsbruckAustria Department of Hematology and Oncology Clinics OttakringViennaAustria Department of Urology Medical University of ViennaViennaAustria Interdisciplinary Genitourinary Oncology Clinic for UrologyClinic for Medical OncologyUniversity Hospital EssenHufelandstrase 55EssenGermany Department of Urology Medical University of GrazGrazAustria

In this review,we revisit the pivotal role of fibroblast growth factor receptor 3(fGfR3)in bladder cancer(BLCA),underscoring its prevalence in both nonmuscle-invasive and muscle-invasive forms of the ***3 mutations in up to half of BLCAs play a well-established role in tumorigenesis,shaping distinct tumor initiation patterns and impacting the tumor microenvironment(TME).Emphasizing the importance of considering epithelial-mesenchymal transition profile and TME status,we revisit their relevance in predicting responses to immune checkpoint inhibitors in fGfR3-mutated *** writing highlights the initially promising yet transient efficacy of the fGfR inhibitor Erdafitinib on fGfR3-mutated BLCA,stressing the pressing need to unravel resistance mechanisms and identify co-targets for future combinatorial studies.A thorough analysis of recent preclinical and clinical evidence reveals resistance mechanisms,including secondarymutations,epigenetic alterations in pathway effectors,phenotypic heterogeneity,and population-specific variations within fGfR3 mutational ***,we discuss the potential of combinatorial treatments and concepts like synthetic lethality for discovering more effective targeted therapies against fGfR3-mutated BLCA.

关键词： Bladder Cancer Erdafitinib fGfR inhibition fGfR3 mutations Resistance to Erdafitinib Tumor Microenvironment

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Terrestrial invertebrate hosts of human pathogens in urban ecosystems

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Eco-Environment & Health 2024年第3期3卷 369-380页

作者： An Xie Yiyue Zhang martin f.Breed Xinli An Haifeng Yao Qiansheng Huang Jianqiang Su Xin Sun Key Laboratory of Urban Environment and Health Ningbo Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control CAS Haixi Industrial Technology Innovation Center in BeilunNingbo 315830China College of Science&Engineering Flinders UniversitySA 5042Australia

Terrestrial invertebrates in urban ecosystems are extremely species-rich,have many important roles in material flow and energy circulation,and are host to many human pathogens that pose threats to human *** invertebrates are widely distributed in urban areas,including both out-and in-door ***,humans are frequently in contact with them,which provides many opportunities for them to pose human health ***,comprehensive knowledge on human pathogen transfer via invertebrates is lacking,with research to date primarily focused on dipterans(e.g.,mosquitoes,flies).Here,we take a broad taxonomic approach and review terrestrial invertebrate hosts(***,flies,termites,cockroaches,mites,ticks,earthworms,collembola,fleas,snails,and beetles)of human pathogens,with a focus on transmission *** also discuss how urbanization and global warming are likely to influence the communities of invertebrate hosts and have flow-on risks to human ***,we identify current research gaps and provide perspectives on future directions.

关键词： Human health Human pathogens Invertebrates Urbanization Zoonoses

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Wear dependent virtual flow rate sensor for progressing cavity pumps with deformable stator

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Petroleum Science 2024年第2期21卷 1346-1353页

作者： Jens Müller Sebastian Leonow Johannes Schulz Christian Hansen martin Monnigmann Ruhr-Universitat Bochum Universit atsstraûe 150Bochum44801Germany SEEPEX GmbH Scharnh olzstraûe 344Bottrop46240Germany

This contribution presents a novel wear dependent virtual flow rate sensor for single stage single lobe progressing cavity pumps. We study the wear-induced material loss of the pump components and the impact of this material loss on the volumetric efficiency. The results are combined with an established backflow model to implement a backflow calculation procedure that is adaptive to wear. We use a laboratory test setup with a highly abrasive fluid and operate a pump from new to worn condition to validate our approach. The obtained measurement data show that the presented virtual sensor is capable of calculating the flow rate of a pump being subject to wear during its regular operation.

关键词： Backflow Progressing cavity pump Virtual sensor Wear

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The Chinese Export Boom:An Examination of the Detailed Trade Data

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China & World Economy 2013年第1期21卷 64-90页

作者： Brett Berger Robert f.martin Division of International finance Board of Governors of the Federal Reserve System Global Monetary and Sovereign Markets Division of International FinanceBoard of Governors of the Federal Reserve System

from 2000 to 2007, Chinese exports grew at a phenomenal pace. Our paper uses finely detailed Chinese export data （8-digit Harmonized Commodity Description and Coding System codes） combined with US trade data to explore how this was achieved. Although general explanations such as China ~ exchange rate policy no doubt played a role, we find that sector-specific stories, effective Chinese industrial policy and fortuitous timing were more critical The detailed trade data reveal that ＂＇new ＂＇ technology goods, such as cell phones, LCD screens and laptops, played a key role. finally, we use the data to examine the relationship between Chinese exports and global manufacturing, in particular US manufacturing employment. We find that competition from China in both domestic and foreign markets likely contributed to a significant decline in USA manufacturing employment, but that relatively low US investment and slow GDP growth in the US following the 2001 recession played an equally important role.

关键词： China export manufacturing trade

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Photoinduced Radical-Ionic Transfer of Various Chlorofluorocarbons to Alkenes from Oxime-Based Surrogates

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CCS Chemistry 2024年第5期6卷 1222-1230页

作者： Jinghui Zhang Muliang Zhang martin Oestreich Institut für Chemie Technische Universität Berlin10623 Berlin Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of ChinaHefei 230026

functional-group-transfer strategies that avoid the use of unsustainable chemicals are attractive for the development of green ***(CfCs)not only contribute to the depletion of the stratospheric ozone layer,but their gaseous nature also poses a serious threat in scientific ***,the design of effective and sustainable alternatives to CfCs is highly ***,a practical CfC transfer platform for the addition of both a fluoroalkyl group and a chlorine substituent across alkenes by a photomediated redox-neutral manifold using bench-stable and easy-to-handle oxime-based surrogates is *** distinct reactivity of these tunable reagents allows for their single-electron reduction to trigger fragmentation driven by benzonitrile formation and loss of carbon *** other fragments released in that step,namely an electrophilic fluoroalkyl radical and a nucleophilic chloride anion,are subsequently transferred onto alkenes by a radical-ionic mechanism to deliver the desired chlorofluorocarbon products.

关键词： alkenes chlorofluorocarbons functionalgroup transfer radical-ionic crossover photoredox catalysis

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Porphyrinic Acceptors forfullerene-free MolecularPhotovoltaics

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CCS Chemistry 2024年第2期6卷 276-296页

作者： Jorge Labella Juan Laforga-martin Tomás Torres Department of Organic Chemistry Universidad Aut´onoma de Madrid28049 Madrid Institute for Advanced Research in Chemical Sciences Universidad Aut´onoma de MadridMadrid IMDEA—Nanociencia 28049 Madrid

Over the past few years,the development of nonfullerene acceptors(NfAs)has become a prominent focus in both organic and perovskite solar cell(OSCs and PSCs,respectively)research *** this context,porphyrinoids,compounds structurally related to porphyrins,have emerged as promising solar cell *** contrast to the widely used fullerene acceptors,porphyrinoids exhibit strong,broad absorption properties across the UV–vis/NIR spectrum,which can be easily tuned through chemical ***,they can be prepared and derivatized using cost-effective and straightforward methodologies,allowing for convenient adjustments in thin-film morphology,processability,supramolecular organization,and energy ***,these compounds offer higher thermal and photochemical stability,resulting in longer device lifetimes compared to their fullerene-based *** this review,we outline the utilization of porphyrinoids as NfAs in OSCs and PSCs,discussing essential aspects such as design guidelines,molecular properties,and device *** goal is to inspire and further promote the development of n-type porphyrinoids,which have not yet fully unleashed their potential.

关键词： fullerene-free molecular photovoltaics nonfullerene acceptors porphyrinic acceptors n-type porphyrinoids organic and perovskite solar cells

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CO_(2)capture costs of chemical looping combustion of biomass:A comparison of natural and synthetic oxygen carrier

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Journal of Energy Chemistry 2024年第5期92卷 296-310页

作者： Benjamin fleiß Juraj Priscak martin Hammerschmid Josef fuchs Stefan Müller Hermann Hofbauer Institute of Chemical Environmental and Bioscience EngineeringTU WienVienna1060 ViennaAustria BEST–Bioenergy and Sustainable Technologies GmbH Graz8010 StyriaAustria

Chemical looping combustion has the potential to be an efficient and low-cost technology capable of contributing to the reduction of the atmospheric concentration of CO_(2) in order to reach the 1.5/2°C goal and mitigate climate *** this process,a metal oxide is used as oxygen carrier in a dual fluidized bed to generate clean CO_(2) via combustion of *** commonly,natural ores or synthetic materials are used as oxygen carrier whereas both must meet special requirements for the conversion of solid *** oxygen carriers are characterized by higher reactivity at the expense of higher costs versus the lower-cost natural *** determine the viability of both possibilities,a techno-economic comparison of a synthetic material based on manganese,iron,and copper to the natural ore ilmenite was *** synthetic oxygen carrier was characterized and tested in a pilot plant,where high combustion efficiencies up to 98.4%and carbon capture rates up to 98.5%were *** techno-economic assessment resulted in CO_(2) capture costs of 75 and 40€/tCO_(2) for the synthetic and natural ore route respectively,whereas a sensitivity analysis showed the high impact of production costs and attrition rates of the synthetic *** synthetic oxygen carrier could break even with the natural ore in case of lower production costs and attrition rates,which could be reached by adapting the production process and recycling *** comparison to state-of-the-art technologies,it is demonstrated that both routes are viable and the capture cost of CO_(2) could be reduced by implementing the chemical looping combustion technology.

关键词： Chemical looping combustion BECCS Techno-economic assessment CO_(2)capture costs Oxygen carrier development Synthetic materials Ilmenite

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A novel saliva-based miRNA profile to diagnose and predict oral cancer

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International Journal of Oral Science 2024年第1期16卷 97-109页

作者： Jaikrishna Balakittnen Chameera Ekanayake Weeramange Daniel f.Wallace Pascal H.G.Duijf Alexandre S.Cristino Gunter Hartel Roberto A.Barrero Touraj Taheri Liz Kenny Sarju Vasani martin Batstone Omar Breik Chamindie Punyadeera Saliva&Liquid Biopsy Translational Laboratory Griffith Institute for Drug DiscoveryGriffith UniversityNathanQLDAustralia Department of Medical Laboratory Sciences Faculty of Allied Health SciencesUniversity of JaffnaJaffnaSri Lanka Menzies Health Institute Griffith UniversityGold CoastQLDAustralia School of Biomedical Sciences Faculty of HealthQueensland University of TechnologyBrisbaneQLDAustralia Centre for Cancer Biology Clinical and Health SciencesUniversity of South Australia&SA PathologyAdelaideSAAustralia Institute of Clinical Medicine Faculty of MedicineUniversity of OsloOsloNorway Department of Medical Genetics Oslo University HospitalOsloNorway Griffith Institute for Drug Discovery Griffith UniversityNathanQLDAustralia QIMR Berghofer Medical Research Institute Statistics UnitBrisbaneQLDAustralia School of Public Health The University of QueenslandBrisbaneQLDAustralia School of Nursing Queensland University of TechnologyBrisbaneQLDAustralia eResearch Research InfrastructureAcademic DivisionQueensland University of TechnologyBrisbaneQLDAustralia Department of Anatomical Pathology Royal Brisbane and Women’s HospitalHerstonQLDAustralia faculty of Medicine The University of QueenslandBrisbaneQLDAustralia Royal Brisbane and Women’s Hospital Cancer Care ServicesHerstonQLDAustralia Department of Otolaryngology Royal Brisbane and Women’s HospitalHerstonQLDAustralia Department of Oral and Maxillofacial Surgery Royal Brisbane and Women’s HospitalHerstonQLDAustralia

Oral cancer (OC) is the most common form of head and neck cancer. Despite the high incidence and unfavourable patient outcomes, currently, there are no biomarkers for the early detection of OC. This study aims to discover, develop, and validate a novel saliva-based microRNA signature for early diagnosis and prediction of OC risk in oral potentially malignant disorders (OPMD).The Cancer Genome Atlas (TCGA) miRNA sequencing data and small RNA sequencing data of saliva samples were used to discover differentially expressed miRNAs. Identified miRNAs were validated in saliva samples of OC (n=50), OPMD (n=52), and controls(n=60) using quantitative real-time PCR. Eight differentially expressed miRNAs (miR-7-5p, miR-10b-5p, miR-182-5p, miR-215-5p,miR-431-5p, miR-486-3p, miR-3614-5p, and miR-4707-3p) were identified in the discovery phase and were validated. The efficiency of our eight-miRNA signature to discriminate OC and controls was:area under curve (AUC):0.954, sensitivity:86%, specificity:90%,positive predictive value (PPV):87.8%and negative predictive value (NPV):88.5%whereas between OC and OPMD was:AUC:0.911,sensitivity:90%, specificity:82.7%, PPV:74.2%and NPV:89.6%. We have developed a risk probability score to predict the presence or risk of OC in OPMD patients. We established a salivary miRNA signature that can aid in diagnosing and predicting OC,revolutionising the management of patients with OPMD. Together, our results shed new light on the management of OC by salivary miRNAs to the clinical utility of using miRNAs derived from saliva samples.

关键词： specificity salivary diagnosis

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