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Ferroelectricity Induced by Oxygen Vacancies in Rhombohedral ZrO_(2) Thin Films

Energy & Environmental Materials 2024年第1期7卷 229-237页

作者： Veniero Lenzi José P.B.silva Břetislav Šmíd Vladimir Matoín Cosmin M.Istrate Corneliu Ghica Judith L.MacManus-Driscoll luís marques Physics Center of Minho and Porto Universities(CF-UM-UP) University of MinhoCampus de Gualtar 4710-057Braga Portugal Laboratory of Physics for Materials and Emergent Technologies LapMETUniversity of Minho4710-057Braga Portugal Department of surface and Plasma science Faculty of Mathematics and PhysicsCharles UniversityV Holešovičkách 218000Prague 8 Czech Republic National Institute of Materials Physics 105 bis Atomistilor 077125Magurele Romania Department of Materials science and Metallurgy 27 Charles Babbage Rd.Cambridge CB3 OFSUK

Rhombohedral phase Hf_(x)Zr_(1.x)O_(2)(HZO,x from 0 to 1)films are promising for achieving robust ferroelectric polarization without the need for an initial wake-up pre-cycling,as is normally the case for the more commonly studied orthorhombic ***,a large spontaneous polarization observed in rhombohedral films is not fully understood,and there are also large discrepancies between experimental and theoretical *** this work,in rhombohedral ZrO_(2)thin films,we show that oxygen vacancies are not only a key factor for stabilizing the phase,but they are also a source of ferroelectric polarization in the *** is shown experimentally through the investigation of the structural properties,chemical composition and the ferroelectric properties of the films before and after an annealing at moderate temperature(400℃)in an oxygen environment to reduce the V_(o)concentration *** experimental work is supported by density functional theory(DFT)calculations which show that the rhombohedral phase is the most stable one in highly oxygen defective ZrO_(2)*** DFT calculations also show that V_(o)contribute to the ferroelectric *** findings reveal the importance of V_(o)for stabilizing rhombohedral ZrO_(2)thin films with superior ferroelectric properties.

关键词： charged defects ferroelectric polarization rhombohedral phase stability zirconia

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Large ferro-pyro-phototronic effect in 0.5Ba(Zr_(0.2)Ti_(0.8))O_(3)-0.5(Ba_(0.7)Ca_(0.3))TiO_(3)thin films integrated on silicon for photodetection

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Carbon Energy 2023年第6期5卷 1-10页

作者： JoséP.B.silva Katarzyna Gwozdz luís s.marques Mario Pereira Maria J.M.Gomes Judith L.MacManus‐Driscoll Robert L.Z.Hoye Centre of Physics of Universities of Minho and Porto(CF‐UM‐UP) University of MinhoBragaPortugal Laboratory of Physics for Materials and Emergent Technologies LapMETUniversity of MinhoBragaPortugal Department of Quantum Technologies Faculty of Fundamental Problems of TechnologyWroclaw University of Science and TechnologyWroclawPoland Department of Materials science and Metallurgy CambridgeUK Inorganic Chemistry Laboratory Department of ChemistryUniversity of OxfordOxfordUK Department of Materials Imperial College LondonLondonUK

Coupling together the ferroelectric,pyroelectric,and photovoltaic characteristics within a single material is a novel way to improve the performance of *** this work,we take advantage of the triple multifunctionality shown by 0.5Ba(Zr_(0.2)Ti_(0.8))O_(3)-0.5(Ba_(0.7)Ca_(0.3))TiO_(3)(BCZT),as demonstrated in an Al/si/siOx/BCZT/ITO thin-film *** si/siOx acts as an n-type layer to form a metal-ferroelectric-insulator-semiconductor heterostructure with the BCZT,and with Al and ITO as *** photo-response of the device,with excitation from a violet laser(405 nm wavelength),is carefully investigated,and it is shown that the photodetector performance is invariant with the chopper frequency owing to the pyro-phototronic effect,which corresponds to the coupling together of the pyroelectric and photovoltaic ***,the photodetector performance was significantly better than that of the devices operating based only on the pyro-phototronic effect by a factor of 4,due to the presence of ferroelectricity in the ***,after a poling voltage of−15 V,for a laser power density of 230mW/cm^(2)and at a chopper frequency of 400Hz,optimized responsivity,detectivity,and sensitivity values of 13.1mA/W,1.7×10^(10)Jones,and 26.9,respectively,are ***,ultrafast rise and fall times of 2.4 and 1.5μs,respectively,are obtained,which are 35,000 and 36,000 times faster rise and fall responses,respectively,than previous reports of devices with the ferro-pyro-phototronic *** is understood based on the much faster ferroelectric switching in ferroelectric thin films owing to the predominant 180°domains in a single direction out of plane.

关键词： ferroelectric ferro-pyro-phototronic effect photodetector polarization-controlled response

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Transplantation of bone marrow derived macrophages reduces markers of neuropathology in an APP/Ps1 mouse model

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Translational Neurodegeneration 2019年第1期8卷 412-422页

作者： luís Costa-marques Katrin Arnold Marie-Christine Pardon Christiane Leovsky samantha swarbrick Claire Fabian Alexandra stolzing Centre for Biological Engineering School of MechanicalElectrical and Manufacturing EngineeringLoughborough UniversityEpinal WayLoughboroughUK Fraunhofer Institute for Cell Therapy and Immunology LeipzigGermany school of Life sciences Queens Medical CentreUniversity of NottinghamNottinghamUK Leipzig University LeipzigGermany

Background:We investigated early hallmarks of putative therapeutic effects following systemic transplantation of bone marrow derived macrophages(BM-M)in APP/Ps1 transgenic ***:BM-M were transplanted into the tail vein and the animals analysed 1 month ***:BM-M transplantation promoted the reduction of the amyloid beta[37-42]plaque number and size in the cortex and hippocampus of the treated mice,but no change in the more heavily modified pyroglutamate amyloid beta E3 *** number of phenotypically‘small’microglia increased in the *** size decreased overall,indicating a reduction of activated *** expression of interleukin 6 and 10,interferongamma,and prostaglandin E receptor 2 was significantly lower in the hippocampus,while interleukin 10 expression was elevated in the cortex of the treated ***:BM-M systemically transplanted,promote a decrease in neuroinflammation and a limited reversion of amyloid *** exploratory study may support the potential of BM-M or microglia-like cell therapy and further illuminates the mechanisms of action associated with such transplants.

关键词： Amyloid beta Microglia Alzheimer’s disease Cell therapy Neuroinflammation

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Artemisia vulgaris Induces Tumor-selective Ferroptosis and Necroptosis via Lysosomal Ca^(2+) signaling

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Chinese Journal of Integrative Medicine 2024年第6期30卷 525-533页

作者： lucas dos santos Zamarioli Michele Rosana Maia santos Adolfo Garcia Erustes Vanessa marques Meccatti Thais Cristine Pereira soraya s smaili Maria Cristina Marcucci Carlos Rocha Oliveira Gustavo Js Pereira Claudia Bincoletto Department of Pharmacology Paulista School of MedicineFederal University of São PauloSão PauloSP04044-020Brazil Research Group on Phytocomplexes and Cell signaling School of Health SciencesAnhembi Morumbi UniversitySão PauloSP03164-000Brazil Department of Biosciences and Oral Diagnosis Institute of Science and TechnologySão Paulo State University(ICT-UNESP)São PauloSP12231-280Brazil

Objective To evaluate the chemical composition and effects of Artemisia vulgaris(AV)hydroalcoholic extract(HEAV)on breast cancer cells(MCF-7 and sKBR-3),chronic myeloid leukemia(K562)and NIH/3T3 *** Phytochemical analysis of HEAV was done by high-performance liquid chromatography-mass(HPLC)*** and cell death studies were performed using trypan blue and Annexin/FITC-7AAD,***-1(Fer-1)and necrostatin-1(Nec-1)were used to assess the mode of HEAV-induced cell death and acetoxymethylester(BAPTA-AM)was used to verify the involvement of cytosolic calcium in this *** calcium measurements were made using *** HEAV decreased the viability of MCF-7,sKBR-3 and K562 cells(Ps was reduced compared to HEAV-exposed fibroblasts(Ps with HEAV induced cell death primarily by late apoptosis and necrosis in assays using annexin V-FITC/7-AAD(Pse of Nec-1 and Fer-1 increased the viability of K562 cells treated with HEAV relative to cells exposed to HEAV alone(Pse mainly from lysosomes in K562 cells(Plular Ca^(2+)chelator,decreased the number of non-viable cells treated with HEAV(Plusions HEAV is cytotoxic and activates several modalities of cell death,which are partially dependent on lysosomal release of Ca^(2+).These effects may be related to artemisinin and caffeoylquinic acids,the main compounds identified in HEAV.

关键词： Artemisia vulgaris necroptosis ferroptosis late apoptosis Ca^(2+)signaling

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Applying a Context-based Method to Build a Knowledge Graph for the Blue Amazon

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Data Intelligence 2024年第1期6卷 64-103页

作者： Pedro de Moraes Ligabue Anarosa Alves Franco Brandão sarajane marques Peres Fabio Gagliardi Cozman Paulo Pirozelli Escola Politécnica Universidade de São PauloRua Visconde da Luz60São PauloSão Paulo 05508-010Brazi Escola Politécnica Universidade de São PauloAv.Prof.Luciano Gualbertotv 3158São Paulo 05508-010Brazil Escola de Artes Ciências e Humanidades Universidade de São PauloRua Arlindo Béttio1000São Paulo 03828-000Brazil Instituto de Estudos Avançados Universidade de São PauloRua da Praça do Relógio109São Paulo 05508-050Brazil

Knowledge graphs are employed in several tasks,such as question answering and recommendation systems,due to their ability to represent relationships between *** constructing such a graphs,however,remains an unresolved challenge within knowledge *** tackle this challenge,we propose CtxKG,a method specifically aimed at extracting knowledge graphs in a context of limited resources in which the only input is a set of unstructured text *** is based on OpenIE(a relationship triple extraction method)and BERT(a language model)and contains four stages:the extraction of relationship triples directly from text;the identification of synonyms across triples;the merging of similar entities;and the building of bridges between knowledge graphs of different *** method distinguishes itself from those in the current literature(i)through its use of the parse tree to avoid the overlapping entities produced by base implementations of OpenIE;and(ii)through its bridges,which create a connected network of graphs,overcoming a limitation similar methods have of one isolated graph per *** compare our method to two others by generating graphs for movie articles from Wikipedia and contrasting them with benchmark graphs built from the OMDb movie *** results suggest that our method is able to improve multiple aspects of knowledge graph *** also highlight the critical role that triple identification and named-entity recognition have in improving the quality of automatically generated graphs,suggesting future paths for ***,we apply CtxKG to build BlabKG,a knowledge graph for the Blue Amazon,and discuss possible improvements.

关键词： knowledge graph word embeddings relationship triple extraction Blue Amazon Atlantic Ocean Brazilian coast

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Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

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Materials Futures 2024年第1期3卷 165-180页

作者： Jonathan Ruiz Esquius Alec P LaGrow Haiyan Jin Zhipeng Yu Ana Araujo Rita marques Adélio Mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre JoséVeigaBraga 4715-330Portugal Carbon science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain scientific Imaging section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal.

Proton exchange membrane(PEM)water electrolysis represents a promising technology for green hydrogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).Herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-hydroxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyO_(x)/ATO,20 wt.%(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 M HClO_(4)),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mAµgIr^(−1) and a large turnover frequency of 123 s^(−1) at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec^(−1),better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7µgIr cm^(−2).Importantly,IrNi1O_(x)/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm^(−2) for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir^(3+)/Ir^(4+)species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO_(2) based catalysts for PEM electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

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Liquid crystal immunosensors for the selective detection of Escherichia coli with a fast analysis tool

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Photonics Research 2024年第7期12卷 1564-1573页

作者： sANDRO C.OLIVEIRA MARIA s.sOAREs BÁRBARA V.GONÇALVEs ANDREIA C.M.RODRIGUEs AMADEU M.V.M.sOAREs RITA G.sOBRAL NUNO F.sANTOs JAN NEDOMA PEDRO L.ALMEIDA CARLOs marques CICECO-Aveiro Institute of Materials Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal i3N Physics DepartmentUniversity of Aveiro3810-193 AveiroPortugal Associate Laboratory i4HB-Institute for Health and Bioeconomy School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal CEsAM-Centre for Environmental and Marine studies and Department of Biology University of Aveiro3810-193 AveiroPortugal Department of Telecommunications VSB-Technical University of OstravaOstrava 70800Czech Republic i3N-CENIMAT School of Sciences and TechnologyNOVA University of Lisbon1099-085 LisbonPortugal UnIRE ISELPolytechnic Institute of Lisbon1549-020 LisbonPortugal Department of Physics VSB-Technical University of OstravaOstrava 70800Czech Republic

The consumption of contaminated food may cause serious illnesses,and traditional methods to detect Escherichia coli are still associated with long waiting times and high costs given the necessity to transport samples to specialized *** is a need to develop new technologies that allow cheap,fast,and direct monitoring at the site of ***,in this work,we developed optical immunosensors for the selective detection of ***,based on liquid crystal technology,whose molecules can align in different manners depending on the boundary conditions (such as substrates) as well as the environment that they *** glass substrate was functionalized with *** antibody using cysteamine as an intermediate,and a vertical alignment was imposed on the liquid crystal molecules by using DMOAP during *** presence of bacteria disrupts the alignment of the liquid crystal molecules,changing the intensity of light emerging between cross polarizers,measured using a polarized optical microscope and a *** was possible to detect *** in suspensions in the concentration range from 2.8 cells/mL to 2.8×10^(9) cells∕*** was also evaluated,and the sensors were used to analyze contaminated water samples.A prototype was developed to allow faster,in-situ,and easier analysis avoiding bulky instruments.

关键词： crystal alignment analysis

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Treatment of spinal cord injury with biomaterials and stem cell therapy in non-human primates and humans

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Neural Regeneration Research 2025年第2期20卷 343-353页

作者： Ana Milena silva Olaya Fernanda Martins Almeida Ana Maria Blanco Martinez suelen Adriani marques PhD Program in Pathological Anatomy Federal University of Rio de JaneiroRio de JaneiroBrazil Biomedical science Institute Federal University of Rio de JaneiroRio de JaneiroBrazil Graduate Program in Pathological Anatomy Federal University of Rio de JaneiroRio de JaneiroBrazil Graduate Program in Pathological Anatomy(PPGAP/UFRJ) Department of Neurobiology/Institute of BiologyCampus do GragoatáNiteróiRio de JaneiroBrazil

spinal cord injury results in the loss of sensory,motor,and autonomic functions,which almost always produces permanent physical ***,in the search for more effective treatments than those already applied for years,which are not entirely efficient,researches have been able to demonstrate the potential of biological strategies using biomaterials to tissue manufacturing through bioengineering and stem cell therapy as a neuroregenerative approach,seeking to promote neuronal recovery after spinal cord *** of these strategies has been developed and meticulously evaluated in several animal models with the aim of analyzing the potential of interventions for neuronal repair and,consequently,boosting functional *** the majority of experimental research has been conducted in rodents,there is increasing recognition of the importance,and need,of evaluating the safety and efficacy of these interventions in non-human primates before moving to clinical trials involving therapies potentially promising in *** article is a literature review from databases(PubMed,science Direct,Elsevier,scielo,Redalyc,Cochrane,and NCBI)from 10 years ago to date,using keywords(spinal cord injury,cell therapy,non-human primates,humans,and bioengineering in spinal cord injury).From 110 retrieved articles,after two selection rounds based on inclusion and exclusion criteria,21 articles were ***,this review arises from the need to recognize the experimental therapeutic advances applied in non-human primates and even humans,aimed at deepening these strategies and identifying the advantages and influence of the results on extrapolation for clinical applicability in humans.

关键词： bioengineering biomaterials cell therapy humans non-human primates spinal cord injury stem cell therapy

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Effect of resistance training volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older females:systematic review and meta-analysis of randomized controlled trials

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Journal of sport and Health science 2024年第2期13卷 145-159页

作者： Paulo Ricardo Prado Nunes Pamela Castro-e-souza Anselmo Alves de Oliveira Bruno de Freitas Camilo Gislaine Cristina-souza lucio marques Vieira-souza Marcelo Augusto da silva Carneiro Department of Body and Human Movement Minas Gerais State University(UEMG)37902-092 PassosMGBrazil University Center of Planalto de Araxa(UNIARAXA) 38180-129 AraxaMGBrazil Physical Activity Health and Ageing Research Group(GPASE)Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Exercise and Nutrition Research Group(GPEN) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil sport sciences and Physical Exercise study and Research Group(GEPCEEX) Minas Gerais State University(UEMG)37902-092 PassosMGBrazil Metabolism Nutrition and Exercise LaboratoryPhysical Education and Sport CenterLondrina State University(UEL)86050-070 LondrinaPRBrazil Postgraduate Program in Physical Education Federal University of Sergipe(UFS)49107-230 Sao CristovaoSEBrazil

Purpose:This meta-analytical study aimed to explore the effects of resistance training(RT) volume on body adiposity,metabolic risk,and inflammation in postmenopausal and older ***:A systematic search was performed for randomized controlled trials in PubMed,scopus,Web of science,and *** controlled trials with postmenopausal and older females that compared RT effects on body adiposity,metabolic risk,and inflammation with a control group(CG) were *** reviewers selected the studies,extracted the data,and performed the risk of bias and certainty of the evidence(Grading of Recommendations,Assessment,Development,and Evaluation(GRADE)) *** body and abdominal adiposity,blood lipids,glucose,and C-reactive protein were included for meta-analysis.A random-effects model,standardized mean difference(Hedges’ g),and 95% confidence interval(95%CI) were used for ***:Twenty randomized controlled trials(overall risk of bias:some concerns;GRADE:low to very low) with overweight/obese postmenopausal and older females were *** groups were divided into low-volume RT(LVRT,~44 sets/week) and high-volume RT(HVRT,~77 sets/week).Both RT groups presented improved body adiposity,metabolic risk,and inflammation when compared to ***,HVRT demonstrated higher effect sizes than LVRT for glucose(HVRT=-1.19;95%CI:-1.63 to-0.74;LVRT=-0.78;95%CI:-1.15 to-0.41) and C-reactive protein(HVRT=-1.00;95%CI:-1.32 to-0.67;LVRT=-0.34;95%CI,-0.63 to-0.04)) when compared to ***:Compared to CG,HVRT protocols elicit greater improvements in metabolic risk and inflammation outcomes than LVRT in overweight/obese postmenopausal and older females.

关键词： C-reactive protein Fat mass Lipid profile Menopause strength training

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systematic Review: Psychological Changes in Women Diagnosed with Breast Cancer

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Open Journal of Obstetrics and Gynecology 2024年第7期14卷 1096-1109页

作者： Hamilton Dos Prazeres Tavares Augusta Josefina marques sachiteque silvina Georgina Tavares Fernando Mango saiengue Alberto Capoco sachiteque Cezaltina Nanduva Kahuli Job Monteiro Tavares Daniel Pires Capingana suelma Beatriz marques Prata Tavares Department of Gynecology and Obstetrics General Hospital of Huambo Huambo Angola Faculty of Medicine University Jos Eduardo dos Santos Huambo Huambo Angola Department of Gynecology and Obstetrics Hospital Municipal of Huambo Huambo Angola Department of Gynecology and Obstetrics Hospital Municipal of Bailundo Huambo Angola Department of Internal Medicine General Hospital of Huambo Huambo Angola Department of Gynecology and Obstetrics Hospital Municipal of Cala Huambo Angola

Breast cancer is considered one of the most common cancers among women, accounting for 25% - 29% of new cases worldwide each year. The diagnosis, living with the disease, as well as the different treatments can have important impacts on the Psychological and mental health of patients. Objective: To investigate the psychological aspects that women with breast cancer develop or may develop. Methodology: A systematic review using the PRIsMA methodology was used. Results: 11 articles that met the inclusion and exclusion criteria were analysed. The largest flow of publications in relation to the effects of the patient with cancer, were carried out between the years 2000 and 2023. Conclusions: Psychological disorders (depression, anxiety, stress) are part of the lives of women diagnosed with breast cancer, and their prevalence varies from one woman to another.

关键词： Anxiety Depression Psychosis sadness Cancer

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