Manuel Sousa Pereira, Antônio Cardoso, Ana Isabel Canavarro, Jorge Figueiredo, Jorge Esparteiro Garcia,
Research into the role of digital influencers in marketing strategies is a rapidly developing area that has attracted the interest of researchers and organizations. In recent years, organizations have become increasingly interested in using digital influencers to promote their brands and disseminate advertising messages with a high impact on their target audience. Digital influencers are beginning to be used as models for sustainable consumption behavior (for example in the fashion, food, and health ...
Tópico(s): Gender, Feminism, and Media
2023 - Multidisciplinary Digital Publishing Institute | Sustainability
Produção Nacional
Revisado por pares
Luiz Henrique de Figueiredo, Jorge Stolfi,
Tópico(s): Polynomial and algebraic computation
2004 - Springer Science+Business Media | Numerical Algorithms
Produção Nacional
Revisado por pares
Anna C. Cunha, Juliana M. Figueiredo, Jorge L. M. Tributino, Ana Luísa P. Miranda, Helena Carla Castro, Russolina B. Zingali, Carlos Alberto Manssour Fraga, Maria Cecília B. V. de Souza, Vı́tor F. Ferreira, Eliezer J. Barreiro,
This paper describes the design, synthesis and pharmacological evaluation of new N-acylhydrazone (NAH) compounds, belonging to the N-substituted-phenyl-1,2,3-triazole-4-acylhydrazone class (2a–p). Classical heteroaromatic ring bioisosterism strategies were applied to the previously reported N-phenylpyrazolyl-4-acylhydrazone derivative 1, elected as lead-compound due to its important anti-aggregating profile on arachidonic acid induced platelet aggregation (IC50=24±0.5 μM), from which emerge this new ...
Tópico(s): Synthesis and Reactions of Organic Compounds
2003 - Elsevier BV | Bioorganic & Medicinal Chemistry
Produção Nacional
Revisado por pares
Jean Eduardo de Oliveira, Nilva Kazue Sakomura, Adriana Nogueira Figueiredo, Jorge de Lucas Júnior, Tânia Mara Baptista dos Santos,
O objetivo deste trabalho foi avaliar o efeito do uso de isolante térmico de telhado instalado como forro sob a cobertura no desempenho de frangos alojados em diferentes densidades (10, 16 e 22 aves/m²) e nas características da cama de aviário em galpão convencional. O experimento foi realizado durante o verão, utilizando 3328 aves da linhagem Hubbard, distribuídas em um delineamento inteiramente casualizado, em um esquema fatorial 3x2 (densidade e sexo), com quatro repetições dentro de cada ambiente. ...
Tópico(s): Bird parasitology and diseases
2000 - Sociedade Brasileira de Zootecnia | Revista Brasileira de Zootecnia
Produção Nacional
Revisado por pares
Jhon Kenedy Moura Chagas, Cícero Célio de Figueiredo, Jorge Paz‐Ferreiro,
Sewage sludge biochar (SSB) is the solid product obtained after the pyrolysis of sludge. In the last ten years, hundreds of studies have evaluated the effects of SSB as a soil amendment over a short period of time. Thus, doubts remain about the temporal behavior of SSB under field conditions. The objective of this study was to evaluate, under field conditions, the effects of SSB on the fertility indicators (pH, potential acidity, Mehlich1-P and -K, CEC and KCl-exchangeable Ca, Mg and Al) and corn yield ...
Tópico(s): Heavy metals in environment
2021 - Elsevier BV | Geoderma
Carlos Alves, Carlos Figueiredo, Jorge Sanjurjo‐Sánchez, Ana C. Hernández,
The present work reviews studies with information on the effects of water by itself on stones of the built environment both to assess the impact of this substance and to discuss possible implications for conservation. The analysis concerns empirical results from previous publications dealing with the effects, on several rock types, of freeze–thaw, wetting, erosion by running water and substances resulting from the water–stone interaction. Laboratory studies have shown that water freezing can cause ...
Tópico(s): 3D Surveying and Cultural Heritage
2021 - Multidisciplinary Digital Publishing Institute | Geosciences
Carlos Alves, Carlos Figueiredo, Jorge Sanjurjo‐Sánchez, Ana C. Hernández,
Natural stone is an important component of historical heritage (buildings and art objects such as sculptures or rock engravings), and it is still widely used in contemporary works. Soluble salts are the main erosive agent in the built environment, and we review here comparative studies that subject the same rock type to testing with different salt solutions. The results mostly support the accepted notion of the major impact of sodium sulphate, although there are some exceptions. The effects of sodium ...
Tópico(s): Cultural Heritage Materials Analysis
2021 - Multidisciplinary Digital Publishing Institute | Heritage
Carlos Neto, José Carlos Costa, Albano Figueiredo, Jorge Capelo, Isildo Gomes, Sónia Vitória, José N. Semedo, António Lopes, Herculano Dinis, Ezequiel Correia, María Cristina Duarte, María M. Romeiras,
The flora and vegetation of the archipelago of Cabo Verde is dominated by Macaronesian, Mediterranean, and particularly by African tropical elements, resulting from its southernmost location, when compared to the other islands of the Macaronesia (i.e., Azores, Madeira, Selvagens, and Canary Islands). Very likely, such a geographical position entailed higher susceptibility to extreme climatic fluctuations, namely those associated with the West African Monsoon oscillations. These fluctuations led to ...
Tópico(s): Plant Diversity and Evolution
2020 - Multidisciplinary Digital Publishing Institute | Diversity
Produção Nacional
Anderson Wilbur Lopes Andrade, Keylla da Conceição Machado, Kátia da Conceição Machado, Daiana Dias Ribeiro Figueiredo, Jorge M. David, Muhammad Torequl Islam, Shaikh Jamal Uddin, Jamil A. Shilpi, Jéssica Pereira Costa,
Free radicals are considered as the causative agents of a variety of acute and chronic pathologies. Natural antioxidants have drawn attention of the researchers in recent years for their ability to scavenge free radicals with minimal or even no side effects. This study evaluates the antioxidant capacity of agathisflavone, a naturally occurring biflavonoid by a number of in vitro methods.Agathisflavone was subjected to DPPH, ABTS, OH and NO radical scavenging assay, reducing potential and inhibition ...
Tópico(s): Biological Activity of Diterpenoids and Biflavonoids
2018 - BioMed Central | Chemistry Central Journal
Produção Nacional
Revisado por pares
Cleide Dos Santos Souza, Maria Socorro Grangeiro, Érica Patrícia Lima Pereira, Cleonice Creusa dos Santos, Alessandra Bispo da Silva, Geraldo Pedral Sampaio, Daiana Dias Ribeiro Figueiredo, Jorge M. David, Juceni P. David, Víctor Diógenes Amaral da Silva, Arthur M. Butt, Sílvia Lima Costa,
Flavonoids are bioactive compounds that are known to be neuroprotective against glutamate-mediated excitotoxicity, one of the major causes of neurodegeneration. The mechanisms underlying these effects are unresolved, but recent evidence indicates flavonoids may modulate estrogen signaling, which can delay the onset and ameliorate the severity of neurodegenerative disorders. Furthermore, the roles played by glial cells in the neuroprotective effects of flavonoids are poorly understood. The aim of ...
Tópico(s): Neurogenesis and neuroplasticity mechanisms
2018 - Elsevier BV | NeuroToxicology
Sandra A. C. Figueiredo, Jorge A. R. Salvador, R. Cortès, Marta Cascante,
Celastrol is one of the most active antitumour compounds among the natural triterpenoids. It has been reported to be highly active against a wide variety of tumours and to affect multiple cellular pathways. A series of new celastrol derivatives, including compounds bearing a urea group, have been synthesised and analysed for their biological activity against human cancer cell lines. Several compounds presented a stronger growth inhibition effect than celastrol on the cell lines studied. Among them, ...
Tópico(s): ATP Synthase and ATPases Research
2017 - Elsevier BV | European Journal of Medicinal Chemistry
Andréia Pizarro, Jasper Schipperijn, José Carlos Ribeiro, António J. Figueiredo, Jorge Mota, Maria Paula Santos,
Identifying where children spend their activity-time may help define relevant domains for effective PA promotion and better understand the relation between PA and environment. Our study aimed to identify how boys and girls allocate their active time in the different domains.374 children (201 girls; mean age = 11.7 years) wore an accelerometer and a GPS for 7 days. PALMS software combined data, categorized nonsedentary time and bouts of moderate-to-vigorous physical activity (MVPA). Geographical information ...
Tópico(s): Physical Activity and Health
2017 - Human Kinetics | Journal of Physical Activity and Health
Sandra A. C. Figueiredo, Jorge A. R. Salvador, R. Cortès, Marta Cascante,
Celastrol and its derivatives have been reported for their potent anticancer activity. Among other celastrol analogues, novel carbamate derivatives were designed and synthesised, and their biological activity on the viability of human cancer cell lines was evaluated. Additionally, a preliminary structure–activity relationship study was conducted. Derivative 18 showed the highest activity on cancer cell viability, combined with the best selectivity between malignant cells and non-malignant fibroblasts. ...
Tópico(s): Bioactive Compounds and Antitumor Agents
2017 - Elsevier BV | European Journal of Medicinal Chemistry
Produção Nacional
Revisado por pares
Renan P. Salvador, Sérgio Cavalaro, Ignacio Segura, Antônio Domingues de Figueiredo, Jorge Pérez,
The objective of this study is to evaluate the early age hydration mechanisms of accelerated CEM I pastes. Liquid phase analysis, conductimetry, isothermal calorimetry, in situ XRD and SEM were performed on cement pastes produced with equivalent doses of an alkaline accelerator (sodium aluminate solution) and of an alkali-free accelerator (aluminum sulfate solution). Results showed that the addition of these chemicals first changes the ionic equilibria of the medium by the consumption of Ca2+ and ...
Tópico(s): Concrete Properties and Behavior
2016 - Elsevier BV | Construction and Building Materials
Vera P. Santos, Sónia A. C. Carabineiro, J.J.W. Bakker, O.S.G.P. Soares, Xiaowei Chen, M.F.R. Pereira, J.J.M. Órfão, José L. Figueiredo, Jorge Gascón, Freek Kapteijn,
Cerium-doped cryptomelane stabilizes polyhedron Au nano-particles smaller than 3 nm. The obtained Au/Ce/cryptomelane catalyst is highly active for CO oxidation. Cationic, neutral, and anionic gold species were found on Ce/cryptomelane. The modification of cryptomelane by the addition of cerium is twofold: (i) cerium is incorporated in the tunnels of cryptomelane, increasing the number of defects which function as nucleation sites for gold and (ii) ceria nano-particles at the surface induce charge ...
Tópico(s): Nanomaterials for catalytic reactions
2013 - Elsevier BV | Journal of Catalysis
Asmâa Abada, A. J. R. Figueiredo, Jorge C. Romão, Ana M. Teixeira,
A bstract We revisit the potential of a Linear Collider concerning the study of lepton flavour violation, in view of new LHC bounds and of the (very) recent developments in lepton physics. Working in the framework of a type I supersymmetric seesaw, we evaluate the prospects of observing seesaw-induced lepton flavour violating final states of the type eμ plus missing energy, arising from e + e − and e − e − collisions. In both cases we address the potential background from standard model and supersymmetric ...
Tópico(s): Particle Detector Development and Performance
2012 - Springer Nature | Journal of High Energy Physics
Produção Nacional
Revisado por pares
Andreza Portella Ribeiro, Ana Maria Graciano Figueiredo, Jorge Eduardo de Souza Sarkis, Marcos A. Hortellani, Bernd Markert,
Tópico(s): Analytical chemistry methods development
2012 - Springer Science+Business Media | Environmental Monitoring and Assessment
Jacinto C. Nascimento, Mário A. T. Figueiredo, Jorge S. Marques,
The analysis of moving objects in image sequences (video) has been one of the major themes in computer vision. In this paper, we focus on video-surveillance tasks; more specifically, we consider pedestrian trajectories and propose modeling them through a small set of motion/vector fields together with a space-varying switching mechanism. Despite the diversity of motion patterns that can occur in a given scene, we show that it is often possible to find a relatively small number of typical behaviors, ...
Tópico(s): Anomaly Detection Techniques and Applications
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Image Processing
Filomena Gomes, Rita Costa, Maria Margarida Ribeiro, Elisa Figueiredo, Jorge Canhoto,
Tópico(s): Yeasts and Rust Fungi Studies
2012 - Springer Science+Business Media | Journal of Forestry Research
Iva Tendais, Bárbara Figueiredo, Jorge Mota, Ana Conde,
This study examines physical activity patterns among women, from pre-pregnancy to the second trimester of pregnancy, and the relationship between physical activity status based on physical activity guidelines and health-related quality of life (HRQoL) and depression over pregnancy. 56 healthy pregnant women self-reported physical activity, HRQoL and depression at 10-15 and 19-24 weeks of pregnancy and physical activity before pregnancy. Whereas vigorous leisure physical activity decreased after conception, ...
Tópico(s): Pregnancy-related medical research
2011 - Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz | Cadernos de Saúde Pública
Clara A. Pinto, Maria das Graças Henriques, Joana Figueiredo, Jorge S. David, F. G. Abreu, J. S. Pereira, Isabel Correia, Teresa S. David,
Budburst date and shoot elongation were measured in two mature Mediterranean evergreen oaks (Quercus suber and Quercus ilex) and their relationships with meteorological and tree water status (predawn leaf water potential) data were analysed. Experimental work took place at two sites: Mitra 2 – Southern Portugal (2002–2003) and Lezirias – Central Portugal (2007–2010). Quercus suber phenology was studied at both sites whereas Q. ilex was only studied at Mitra 2. Quercus suber budburst date occurred at a photoperiod ...
Tópico(s): Horticultural and Viticultural Research
2011 - Elsevier BV | Forest Ecology and Management
Asmâa Abada, A. J. R. Figueiredo, Jorge C. Romão, Ana M. Teixeira,
We consider a supersymmetric type III seesaw, where the additional heavy states are embedded into complete SU(5) representations to preserve gauge coupling unification. Complying with phenomenological and experimental constraints strongly tightens the viable parameter space of the model. In particular, one expects very characteristic signals of lepton flavour violation both at low-energies and at the LHC, which offer the possibility of falsifying the model.
Tópico(s): Dark Matter and Cosmic Phenomena
2011 - Springer Nature | Journal of High Energy Physics
Estrela Figueiredo, Jorge Paiva, Tariq Stévart, F. Oliveira, Gideon F. Smith,
A catalogue of the flowering plants of the islands of São Tomé and Príncipe (Gulf of Guinea) is presented. Flowering plant diversity figures are updated to: 135 families (20 introduced), 624 genera (172 introduced), 1 104 species (301 introduced) plus 15 additional infraspecific taxa. At present 119 taxa (107 species and 12 infraspecific taxa) are known to be endemic to the two islands. The catalogue includes accepted names, synonyms used in recent literature, common names, voucher specimens and information ...
Tópico(s): Fern and Epiphyte Biology
2011 - AOSIS | Bothalia
Jacinto C. Nascimento, Mário A. T. Figueiredo, Jorge S. Marques,
This paper proposes an approach for recognizing human activities (more specifically, pedestrian trajectories) in video sequences, in a surveillance context. A system for automatic processing of video information for surveillance purposes should be capable of detecting, recognizing, and collecting statistics of human activity, reducing human intervention as much as possible. In the method described in this paper, human trajectories are modeled as a concatenation of segments produced by a set of low ...
Tópico(s): Gait Recognition and Analysis
2010 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Image Processing
Asmâa Abada, A. J. R. Figueiredo, Jorge C. Romão, Ana M. Teixeira,
We study the impact of a type-I SUSY seesaw concerning lepton flavour violation (LFV) both at low-energies and at the LHC. The study of the di-lepton invariant mass distribution at the LHC allows to reconstruct some of the masses of the different sparticles involved in a decay chain. In particular, the combination with other observables renders feasible the reconstruction of the masses of the intermediate sleptons involved in $ \chi_2^0 \to \tilde{\ell }\ell \to \ell \ell \chi_1^0 $ decays. Slepton mass splittings ...
Tópico(s): Dark Matter and Cosmic Phenomena
2010 - Springer Nature | Journal of High Energy Physics
Aristides M. Machado‐Rodrigues, António J. Figueiredo, Jorge Mota, Sean P. Cumming, J C Eisenmann, Robert M. Malina, Manuel J. Coelho‐e‐Silva,
Estimates of daily energy expenditure are important to studies of physical activity and energy balance. Objective measures are not always feasible and further research is needed to validate survey instruments and diaries. The study validates estimated activity energy expenditure (AEE) based on a 3-day diary protocol relative to AEE derived from uniaxial accelerometry in adolescents, 265 girls and 227 boys (12.5-16.4 years). Participants completed the diary and wore a GT1M Actigraph accelerometer on ...
Tópico(s): Mobile Health and mHealth Applications
2010 - Wiley | Scandinavian Journal of Medicine and Science in Sports
Produção Nacional
Revisado por pares
Ângela Kinoshita, Alcina Magnólia Franca Barreto, Roseneide Rodrigues de Souza Calazans Alves, Ana Maria G. Figueiredo, Jorge Eduardo de Souza Sarkis, Marcelo L. Dias, Oswaldo Baffa,
Two Stegomastodon waringi teeth from Brazilian northeastern megafauna were dated by electron spin resonance (ESR) spectroscopy. The samples were collected in Pernambuco state, Brazil. The dating of these samples will contribute to the better knowledge of megafauna presence in this region as well as to the events associated to the extinction of these species. Additive dose method was used to evaluate the archeological dose (AD) and a non-linear relation between ESR signal amplitude and dose was obtained. ...
Tópico(s): Identification and Quantification in Food
2008 - Elsevier BV | Radiation Measurements
Produção Nacional
Revisado por pares
Fabiano Pinto Saggioro, Marcos A. Rossi, Maria Irma Seixas Duarte, Carmen Cinira S. Martin, Venâncio Avancini Ferreira Alves, Marcos Lázaro Moreli, L T Figueiredo, Jorge E. Moreira, Alessandra Abel Borges, Luciano Neder,
Despite clinical evidence of myocardial dysfunction, there is no pathological evidence of myocardial injury in hantavirus pulmonary syndrome (HPS). The dominant opinion is that the primary cardiac lesion is functional rather than structural. The present study describes hantaviral antigen and particles in the cardiac endothelium and interstitial macrophages in association with a typical myocarditis in HPS. Human hearts from 14 individuals who died of HPS were compared with hearts from 14 individuals ...
Tópico(s): Viral Infections and Outbreaks Research
2007 - Oxford University Press | The Journal of Infectious Diseases
Lori Scanga, Shu Chaing, Cynthia M. Powell, Arthur S. Aylsworth, Lizzie J. Harrell, Nancy G. Henshaw, Chris Civalier, Leigh B. Thorne, Karen E. Weck, Jessica K. Booker, Margaret L. Gulley,
... Scholar, 11Yamamoto AY Mussi-Pinhata MM Pinto PC Figueiredo LT Jorge SM Usefulness of blood and urine samples collected ...
Tópico(s): Biosensors and Analytical Detection
2006 - Elsevier BV | Journal of Molecular Diagnostics
Produção Nacional
Revisado por pares
Bartira Ercília Pinheiro da Costa, Caio Augusto Scocco, Carlos Eduardo Poli‐de‐Figueiredo, Jorge A. Guimarães,
Objective To measure the activity of serum phosphodiesterase (PDE) in pre‐eclampsia. Design Case–control study. Setting Nephrology Laboratory and Obstetrics Unit at São Lucas Hospital from Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brazil. Sample Twenty‐nine normal and 28 pregnant women with pre‐eclampsia. Methods Serum was collected from women with pre‐eclampsia, at the time of diagnosis, and from gestation‐matched controls. Circulating PDE activity was assessed by measuring ...
Tópico(s): Maternal and fetal healthcare
2006 - Wiley | BJOG An International Journal of Obstetrics & Gynaecology