972 results on '"A. F. Marques"'
Search Results
152. Aeroelastic analysis and nonlinear characterization of three-degree-of-freedom systems with discontinuous nonlinearities
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R. Vasconcellos, A. Bouma, F. Marques, A. Abdelkefi, and M.R. Hajj
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ENGENHARIA MECÂNICA ,Mechanics of Materials ,Applied Mathematics ,Mechanical Engineering - Published
- 2022
153. Mineralized collagen as a bioactive ink to support encapsulation of human adipose stem cells: a step towards the future of bone regeneration
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Gabriela S. Diogo, Catarina F. Marques, Sara Freitas-Ribeiro, Carmen G. Sotelo, Ricardo I. Pérez-Martin, Rogério P. Pirraco, Rui L. Reis, Tiago H. Silva, and Universidade do Minho
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3D bioprinting ,Science & Technology ,Stem Cells ,Bioprinting ,Biomedical Engineering ,Bioengineering ,Bone regeneration ,Biomaterials ,Adipose Tissue ,Humans ,Ink ,Collagen ,Marine collagen ,Co-precipitation - Abstract
Bioprinting – printing with incorporated living cells – has earned special attention on tissue engineering approaches, aiming to closer reproduce the 3D microenvironment of the target tissue. However, it raises extra complexity related to the need to use cell-friendly printing conditions that still comply with material printing fidelity. Inspired by the composite nano structural organization of mineralized tissues, this work reports the efficiency of the chemical approach followed to in situ mineralize blue shark skin collagen, at a nano scale level, to ultimately produce stable inks. The influence of initial cellular density was evaluated by assessing three different concentrations (2.5, 5 and 7.5 × 106 cells·ml−1) of human adipose stem cells (hASC), with the higher density of encapsulated cells presenting improved viability in a long culture term. Immunodetection of osteogenic-related markers, like RUNX2 and osteopontin, 21 days after cell culture in basal conditions confirmed the potential of the ink to be applied for osteogenic purposes, which may be associated with the success of the cell-to-ink interaction and the Ca2+ ions released from the co-precipitated hydroxyapatite. A combination of mineralized shark collagen, alginate and hASC is thus proposed as a bioactive bioink with potential properties for regeneration of bone tissue., This study was funded by the Portuguese Foundation for Science and Tecnology (FCT) under the scope of the BiogenInk project (M-ERA-NET2/ 0022/2016), by European Regional Development Fund through INTERREG Atlantic Area Programme, under the scope of BLUEHUMAN (EAPA_151/ 2016) project and through Norte de Portugal Regional Operational Program (NORTE 2020), under the scope of Structured project NORTE-01-0145- FEDER-000021. The Doctoral Programme NORTE-08-5369-FSE-000037 supported by NORTE 2020, under the PORTUGAL 2020 Partnership Agreement, through the European Social Fund, is also greatly acknowledge by the PhD fellowship of GSD. RP and SF-R thank FCT for the investigator contract IF/00347/2015 and PhD grant PD/BD/135252/2017, respectively. The authors acknowledge also the Centro Tecnológico del Mar (CETMAR, Vigo, Spain) and COPEMAR SA (fishing company, Spain) for the kind offer of the used by-products for the production of collagen.
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- 2022
154. Constraints on the structure and seasonal variations of Triton’s atmosphere from the 5 October 2017 stellar occultation and previous observations
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J. Marques Oliveira, B. Sicardy, A. R. Gomes-Júnior, J. L. Ortiz, D. F. Strobel, T. Bertrand, F. Forget, E. Lellouch, J. Desmars, D. Bérard, A. Doressoundiram, J. Lecacheux, R. Leiva, E. Meza, F. Roques, D. Souami, T. Widemann, P. Santos-Sanz, N. Morales, R. Duffard, E. Fernández-Valenzuela, A. J. Castro-Tirado, F. Braga-Ribas, B. E. Morgado, M. Assafin, J. I. B. Camargo, R. Vieira-Martins, G. Benedetti-Rossi, S. Santos-Filho, M. V. Banda-Huarca, F. Quispe-Huaynasi, C. L. Pereira, F. L. Rommel, G. Margoti, A. Dias-Oliveira, F. Colas, J. Berthier, S. Renner, R. Hueso, S. Pérez-Hoyos, A. Sánchez-Lavega, J. F. Rojas, W. Beisker, M. Kretlow, D. Herald, D. Gault, K.-L. Bath, H.-J. Bode, E. Bredner, K. Guhl, T. V. Haymes, E. Hummel, B. Kattentidt, O. Klös, A. Pratt, B. Thome, C. Avdellidou, K. Gazeas, E. Karampotsiou, L. Tzouganatos, E. Kardasis, A. A. Christou, E. M. Xilouris, I. Alikakos, A. Gourzelas, A. Liakos, V. Charmandaris, M. Jelínek, J. Štrobl, A. Eberle, K. Rapp, B. Gährken, B. Klemt, S. Kowollik, R. Bitzer, M. Miller, G. Herzogenrath, D. Frangenberg, L. Brandis, I. Pütz, V. Perdelwitz, G. M. Piehler, P. Riepe, K. von Poschinger, P. Baruffetti, D. Cenadelli, J.-M. Christille, F. Ciabattari, R. Di Luca, D. Alboresi, G. Leto, R. Zanmar Sanchez, P. Bruno, G. Occhipinti, L. Morrone, L. Cupolino, A. Noschese, A. Vecchione, C. Scalia, R. Lo Savio, G. Giardina, S. Kamoun, R. Barbosa, R. Behrend, M. Spano, E. Bouchet, M. Cottier, L. Falco, S. Gallego, L. Tortorelli, S. Sposetti, J. Sussenbach, F. Van Den Abbeel, P. André, M. Llibre, F. Pailler, J. Ardissone, M. Boutet, J. Sanchez, M. Bretton, A. Cailleau, V. Pic, L. Granier, R. Chauvet, M. Conjat, J. L. Dauvergne, O. Dechambre, P. Delay, M. Delcroix, L. Rousselot, J. Ferreira, P. Machado, P. Tanga, J.-P. Rivet, E. Frappa, M. Irzyk, F. Jabet, M. Kaschinski, A. Klotz, Y. Rieugnie, A. N. Klotz, O. Labrevoir, D. Lavandier, D. Walliang, A. Leroy, S. Bouley, S. Lisciandra, J.-F. Coliac, F. Metz, D. Erpelding, P. Nougayrède, T. Midavaine, M. Miniou, S. Moindrot, P. Morel, B. Reginato, E. Reginato, J. Rudelle, B. Tregon, R. Tanguy, J. David, W. Thuillot, D. Hestroffer, G. Vaudescal, D. Baba Aissa, Z. Grigahcene, D. Briggs, S. Broadbent, P. Denyer, N. J. Haigh, N. Quinn, G. Thurston, S. J. Fossey, C. Arena, M. Jennings, J. Talbot, S. Alonso, A. Román Reche, V. Casanova, E. Briggs, R. Iglesias-Marzoa, J. Abril Ibáñez, M. C. Díaz Martín, H. González, J. L. Maestre García, J. Marchant, I. Ordonez-Etxeberria, P. Martorell, J. Salamero, F. Organero, L. Ana, F. Fonseca, V. Peris, O. Brevia, A. Selva, C. Perello, V. Cabedo, R. Gonçalves, M. Ferreira, F. Marques Dias, A. Daassou, K. Barkaoui, Z. Benkhaldoun, M. Guennoun, J. Chouqar, E. Jehin, C. Rinner, J. Lloyd, M. El Moutamid, C. Lamarche, J. T. Pollock, D. B. Caton, V. Kouprianov, B. W. Timerson, G. Blanchard, B. Payet, A. Peyrot, J.-P. Teng-Chuen-Yu, J. Françoise, B. Mondon, T. Payet, C. Boissel, M. Castets, W. B. Hubbard, R. Hill, H. J. Reitsema, O. Mousis, L. Ball, G. Neilsen, S. Hutcheon, K. Lay, P. Anderson, M. Moy, M. Jonsen, I. Pink, R. Walters, B. Downs, Ministerio de Ciencia e Innovación (España), Junta de Andalucía, European Research Council, European Commission, Fundação para a Ciência e a Tecnologia (Portugal), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University (UNESP), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Johns Hopkins University (JHU), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut Polytechnique des Sciences Avancées (IPSA), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Observatoire de la Côte d'Azur (OCA), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Comisión Nacional de Investigación y Desarrollo Aeroespacial (CONIDA), Observatorio Astronómico de Moquegua, Florida Space Institute [Orlando] (FSI), University of Central Florida [Orlando] (UCF), Federal University of Technology - Paraná (UTFPR), Observatório Nacional [Rio de Janeiro] (ON), Ministério da Ciência, Tecnologia, Inovações e Comunicações (MCTIC), Universidade Federal do Rio de Janeiro (UFRJ), Polo Educacional Sesc [Rio de Janeiro], Université de Lille, Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne] (UPV/EHU), International Occultation Timing Association (IOTA), Internationale Amateursternwarte [Mittenwalde] (IAS), Société Astronomique de France (SAF), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), Analyse, ingénierie et contrôle des micro-organismes (MICROCOSME), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Université Grenoble Alpes (UGA), Laboratoire Ondes et Matière d'Aquitaine (LOMA), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), European Project: 669416,H2020,ERC-2014-ADG,LUCKY STAR(2015), and European Project: 687378,H2020,H2020-COMPET-2015,SBNAF(2016)
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Earth and Planetary Astrophysics (astro-ph.EP) ,planets and satellites: atmospheres ,planets and satellites: physical evolution ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,photometric [Techniques] ,FOS: Physical sciences ,Astronomy and Astrophysics ,methods: data analysis ,techniques: photometric ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,atmospheres [Planets and satellites] ,observational [Methods] ,methods: observational ,data analysis [Methods] ,physical evolution [Planets and satellites] ,Astrophysics - Earth and Planetary Astrophysics - Abstract
J.M.O. acknowledges financial support from the Portuguese Foundation for Science and Technology (FCT) and the European Social Fund (ESF) through the PhD grant SFRH/BD/131700/2017. The work leading to these results has received funding from the European Research Council under the European Community's H2020 2014-2021 ERC grant Agreement nffi 669416 "Lucky Star". We thank S. Para who supported some travels to observe the 5 October 2017 occultation. T.B. was supported for this research by an appointment to the National Aeronautics and Space Administration (NASA) Post-Doctoral Program at the Ames Research Center administered by Universities Space Research Association (USRA) through a contract with NASA. We acknowledge useful exchanges with Mark Gurwell on the ALMA CO observations. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium).Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. J.L.O., P.S.-S., N.M. and R.D. acknowledge financial support from the State Agency for Research of the Spanish MCIU through the "Center of Excellence Severo Ochoa" award to the Instituto de Astrofisica de Andalucia (SEV-2017-0709), they also acknowledge the financial support by the Spanish grant AYA-2017-84637-R and the Proyecto de Excelencia de la Junta de Andalucia J.A. 2012-FQM1776. The research leading to these results has received funding from the European Union's Horizon 2020 Research and Innovation Programme, under Grant Agreement no. 687378, as part of the project "Small Bodies Near and Far" (SBNAF). P.S.-S. acknowledges financial support by the Spanish grant AYA-RTI2018-098657-J-I00 "LEO-SBNAF". The work was partially based on observations made at the Laboratorio Nacional de Astrofisica (LNA), Itajuba-MG, Brazil. The following authors acknowledge the respective CNPq grants: F.B.-R. 309578/2017-5; R.V.-M. 304544/2017-5, 401903/2016-8; J.I.B.C. 308150/2016-3 and 305917/2019-6; M.A. 427700/20183, 310683/2017-3, 473002/2013-2. This study was financed in part by the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior -Brasil (CAPES) -Finance Code 001 and the National Institute of Science and Technology of the e-Universe project (INCT do e-Universo, CNPq grant 465376/2014-2). G.B.R. acknowledges CAPES-FAPERJ/PAPDRJ grant E26/203.173/2016 and CAPES-PRINT/UNESP grant 88887.571156/2020-00, M.A. FAPERJ grant E26/111.488/2013 and A.R.G.Jr. FAPESP grant 2018/11239-8. B.E.M. thanks CNPq 150612/2020-6 and CAPES/Cofecub-394/2016-05 grants. Part of the photometric data used in this study were collected in the frame of the photometric observations with the robotic and remotely controlled telescope at the University of Athens Observatory (UOAO; Gazeas 2016). The 2.3 m Aristarchos telescope is operated on Helmos Observatory by the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing of the National Observatory of Athens. Observations with the 2.3 m Aristarchos telescope were carried out under OPTICON programme. This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 730890. This material reflects only the authors views and the Commission is not liable for any use that may be made of the information contained therein. The 1. 2m Kryoneri telescope is operated by the Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing of the National Observatory of Athens. The Astronomical Observatory of the Autonomous Region of the Aosta Valley (OAVdA) is managed by the Fondazione Clement Fillietroz-ONLUS, which is supported by the Regional Government of the Aosta Valley, the Town Municipality of Nus and the "Unite des Communes valdotaines Mont-Emilius". The 0.81 m Main Telescope at the OAVdA was upgraded thanks to a Shoemaker NEO Grant 2013 from The Planetary Society. D.C. and J.M.C. acknowledge funds from a 2017 'Research and Education' grant from Fondazione CRT-Cassa di Risparmio di Torino. P.M. acknowledges support from the Portuguese Fundacao para a Ciencia e a Tecnologia ref. PTDC/FISAST/29942/2017 through national funds and by FEDER through COMPETE 2020 (ref. POCI010145 FEDER007672). F.J. acknowledges Jean Luc Plouvier for his help. S.J.F. and C.A. would like to thank the UCL student support observers: Helen Dai, Elise Darragh-Ford, Ross Dobson, Max Hipperson, Edward Kerr-Dineen, Isaac Langley, Emese Meder, Roman Gerasimov, Javier Sanjuan, and Manasvee Saraf. We are grateful to the CAHA, OSN and La Hita Observatory staffs. This research is partially based on observations collected at Centro Astronomico HispanoAleman (CAHA) at Calar Alto, operated jointly by Junta de Andalucia and Consejo Superior de Investigaciones Cientificas (IAA-CSIC). This research was also partially based on observation carried out at the Observatorio de Sierra Nevada (OSN) operated by Instituto de Astrofisica de Andalucia (CSIC). This article is also based on observations made with the Liverpool Telescope operated on the island of La Palma by Liverpool John Moores University in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias with financial support from the UK Science and Technology Facilities Council. Partially based on observations made with the Tx40 and Excalibur telescopes at the Observatorio Astrofisico de Javalambre in Teruel, a Spanish Infraestructura Cientifico-Tecnica Singular (ICTS) owned, managed and operated by the Centro de Estudios de Fisica del Cosmos de Aragon (CEFCA). Tx40 and Excalibur are funded with the Fondos de Inversiones de Teruel (FITE). A.R.R. would like to thank Gustavo Roman for the mechanical adaptation of the camera to the telescope to allow for the observation to be recorded. R.H., J.F.R., S.P.H. and A.S.L. have been supported by the Spanish projects AYA2015-65041P and PID2019-109467GB-100 (MINECO/FEDER, UE) and Grupos Gobierno Vasco IT1366-19. Our great thanks to Omar Hila and their collaborators in Atlas Golf Marrakech Observatory for providing access to the T60cm telescope. TRAPPIST is a project funded by the Belgian Fonds (National) de la Recherche Scientifique (F.R.S.-FNRS) under grant PDR T.0120.21. TRAPPIST-North is a project funded by the University of Liege, and performed in collaboration with Cadi Ayyad University of Marrakesh. E.J. is a FNRS Senior Research Associate., Context. A stellar occultation by Neptune's main satellite, Triton, was observed on 5 October 2017 from Europe, North Africa, and the USA. We derived 90 light curves from this event, 42 of which yielded a central flash detection. Aims. We aimed at constraining Triton's atmospheric structure and the seasonal variations of its atmospheric pressure since the Voyager 2 epoch (1989). We also derived the shape of the lower atmosphere from central flash analysis. Methods. We used Abel inversions and direct ray-tracing code to provide the density, pressure, and temperature profiles in the altitude range similar to 8 km to similar to 190 km, corresponding to pressure levels from 9 mu bar down to a few nanobars. Results. (i) A pressure of 1.18 +/- 0.03 mu bar is found at a reference radius of 1400 km (47 km altitude). (ii) A new analysis of the Voyager 2 radio science occultation shows that this is consistent with an extrapolation of pressure down to the surface pressure obtained in 1989. (iii) A survey of occultations obtained between 1989 and 2017 suggests that an enhancement in surface pressure as reported during the 1990s might be real, but debatable, due to very few high S/N light curves and data accessible for reanalysis. The volatile transport model analysed supports a moderate increase in surface pressure, with a maximum value around 2005-2015 no higher than 23 mu bar. The pressures observed in 1995-1997 and 2017 appear mutually inconsistent with the volatile transport model presented here. (iv) The central flash structure does not show evidence of an atmospheric distortion. We find an upper limit of 0.0011 for the apparent oblateness of the atmosphere near the 8 km altitude., Portuguese Foundation for Science and Technology SFRH/BD/131700/2017, European Social Fund (ESF) SFRH/BD/131700/2017, European Research Council under the European Community's H2020 2014-2021 ERC grant 669416, Spanish Government SEV-2017-0709 AYA-2017-84637-R AYA-RTI2018-098657-J-I00, Junta de Andalucia 2012-FQM1776, European Union's Horizon 2020 Research and Innovation Programme, as part of the project "Small Bodies Near and Far" (SBNAF) 687378, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ), Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF) 309578/2017-5 304544/2017-5 401903/2016-8 308150/2016-3 305917/2019-6 427700/2018-3 310683/2017-3 473002/2013-2, Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) 001, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) 465376/2014-2 CAPES-FAPERJ/PAPDRJ grant E26/203.173/2016 CAPES-PRINT/UNESP grant 88887.571156/2020-00, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ) E26/111.488/2013, Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 2018/11239-8, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) 150612/2020-6, European Union's Horizon 2020 research and innovation programme 730890, Regional Government of the Aosta Valley, Town Municipality of Nus, Unite des Communes valdotaines Mont-Emilius, Planetary Society, Fondazione CRT-Cassa di Risparmio di Torino, Portuguese Foundation for Science and Technology PTDC/FISAST/29942/2017, FEDER through COMPETE 2020 POCI010145 FEDER007672, UK Research & Innovation (UKRI), Science & Technology Facilities Council (STFC), Fondos de Inversiones de Teruel (FITE), Spanish Government AYA2015-65041P PID2019-109467GB-100, Grupos Gobierno Vasco IT1366-19, Fonds de la Recherche Scientifique - FNRS PDR T.0120.21, University of Liege, CAPES/Cofecub-394/2016-05
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- 2022
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155. COURAGE as a Roadmap Toward Sustainable Practices in a Post-COVID World
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Joan F. Marques
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- 2022
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156. Two highly photoluminescent Eu3+ β-diketonates complexes with ε-caprolactam as ancillary ligands: From synthesis to the first example as gunshot residue markers
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Emmanuel M. Gomes, Julia P. De Oliveira Silva, Marcos V. Colaço, Alexandre Cuin, Douglas F. Franco, Sérgio L. Scarpari, Danilo O. De Souza, Monica S. Ferreira, Ricardo O. Freire, and Lippy F. Marques
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Inorganic Chemistry ,Organic Chemistry ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Atomic and Molecular Physics, and Optics ,Spectroscopy ,Electronic, Optical and Magnetic Materials - Published
- 2023
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157. Relationships between Brewer-Dobson circulation, double tropopauses, ozone and stratospheric water vapour
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J. M. Castanheira, T. R. Peevey, C. A. F. Marques, and M. A. Olsen
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Statistical relationships between the variability of the area covered by double tropopause events (DTs), the strength of the tropical upwelling, the total column ozone and of the lower stratospheric water vapour are analyzed. The QBO and ENSO signals in the double tropopause and tropical upwelling as well as their influence on the statistical relationships are also presented. The analysis is based on both reanalysed data (ERA-Interim) and satellite data. Significant anticorrelations were found between the area covered by DTs and the total column ozone in the midlatitudes of the Northern Hemisphere. This relationship is confirmed by a large positive correlation between the areas covered by ozone laminae and double tropopause events as found in the HIRDLS satellite dataset. Significant anticorrelations were also found between the global area of double tropopause events and the near global (50° S–50° N) water vapour in the lower stratosphere. The correlations of DT variables with total column ozone and ozone laminae are both consistent with the poleward displacement of tropical air with lower ozone mixing ratio and with tropospheric intrusions of tropical tropospheric air into the lower extratropical stratosphere. The association of DTs with the poleward displacements of the tropical air is also consistent with a strong positive correlation between the area covered by DTs and the wave activity in the lower most stratosphere, between the first and second lapse rate tropopauses, as found in the ERA-Interim reanalysis. Finally, a significant anticorrelation was found between the tropical upwelling and the near global lower stratospheric water vapour. Moreover, the step like decrease in the lower stratospheric water vapour after 2001 is mirrored by a step like increase in the tropical upwelling.
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- 2012
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158. Caracterização fenogenotípica da resistência antimicrobiana em Staphylococcus spp. isolados de mastite bovina
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Elaine C.L. Mendonça, Viviane F. Marques, Dayanne A. Melo, Tatiani A. Alencar, Irene da S. Coelho, Shana M.O. Coelho, and Miliane M.S. Souza
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Mastite bovina ,resistência antimicrobiana ,Staphylococcus spp. ,Veterinary medicine ,SF600-1100 - Abstract
A utilização de antibióticos no controle das infecções intramamárias e na eliminação de prováveis fontes de infecção nas fazendas leiteiras se constitui em importante medida de controle. No entanto, o uso inadequado de antibióticos no tratamento da doença pode selecionar cepas resistentes e comprometer a eficiência do tratamento. Bactérias do gênero Staphylococcus spp. estão entre os principais agentes etiológicos da mastite bovina e são freqüentemente resistentes aos antimicrobianos, em especial aos beta-lactâmicos, principalmente por dois mecanismos distintos: a produção da enzima extracelular beta-lactamase, codificada pelo gene blaZ, e a produção de PBP2a ou PBP2´, uma proteína ligante de penicilina de baixa afinidade, codificada pelo gene mecA. A expressão do gene mecA é constitutiva ou induzida por antibióticos betalactâmicos, como a oxacilina e cefoxitina. O gene mecA está inserido no cromossomo através de um elemento genético móvel, denominado cassete estafilocócico cromossômico mec (SCCmec). O presente estudo avaliou o perfil fenogenotípico de resistência aos beta-lactâmicos em 250 isolados de Staphylococcus spp., utilizando os marcadores oxacilina e cefoxitina, de modo a produzir dados que possam contribuir para o conhecimento da resistência antimicrobiana em algumas propriedades leiteiras das regiões Sul-Fluminense e Metropolitana do Estado do Rio de Janeiro com o objetivo de subsidiar a implementação de medidas de controle dessa enfermidade. A avaliação da resistência foi feita a partir de 8 diferentes testes fenotípicos, sendo obtidos 54 perfis. Os testes de difusão em disco simples e ágar screen com oxacilina foram utilizados como "padrão ouro" para os cálculos dos valores de sensibilidade, especificidade e predição por serem preconizados pelo CLSI veterinário. O teste de difusão em disco simples com cefoxitina foi o de melhor desempenho na predição da resistência a oxacilina. Na avaliação genotípica, não foi detectado qualquer isolado positivo para o gene mecA, já os genes mecI e mecRI foram detectados igualmente em 11,6% (29/250) dos Staphylococcus spp. avaliados. Foram detectados os quatro tipos de cassete mec analisados (I, II, III e IV), sendo o tipo I o que teve mais ampla distribuição entre as regiões estudadas. Gene blaZ foi detectado em 5,2% (13/250) dos isolados, sendo que nestes, todo o sistema blaZ-blaI- blaR1 foi detectado em 23,1% (3/13) dos isolados.
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- 2012
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159. Diretrizes para prevenção e tratamento da osteoporose induzida por glicocorticoide Guidelines for the prevention and treatment of glucocorticoid-induced osteoporosis
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Rosa Maria Rodrigues Pereira, Jozélio Freire de Carvalho, Ana Patrícia Paula, Cristiano Zerbini, Diogo S. Domiciano, Helenice Gonçalves, Jaime S. Danowski, João F. Marques Neto, Laura M. C. Mendonça, Mailze C. Bezerra, Maria Teresa Terreri, Marta Imamura, Pedro Weingrill, Perola G. Plapler, Sebastião Radominski, Tatiana Tourinho, Vera L. Szejnfeld, and Nathalia C. Andrada
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tratamento ,osteoporose ,glicocorticoide ,treatment ,osteoporosis ,glucocorticoid ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Os glicocorticoides (GC) são prescritos por praticamente todas as especialidades médicas, e cerca de 0,5% da população geral do Reino Unido utiliza esses medicamentos. Com o aumento da sobrevida dos pacientes com doenças reumatológicas, a morbidade secundária ao uso dessa medicação representa um aspecto importante que deve ser considerado no manejo de nossos pacientes. As incidências de fraturas vertebrais e não vertebrais são elevadas, variando de 30%-50% em pessoas que usam GC por mais de três meses. Assim, a osteoporose e as fraturas por fragilidade devem ser prevenidas e tratadas em todos os pacientes que iniciarão ou que já estejam em uso desses esteroides. Diversas recomendações elaboradas por várias sociedades internacionais têm sido descritas na literatura, porém não há consenso entre elas. Recentemente, o Americam College of Rheumatology publicou novas recomendações, porém elas são fundamentadas na FRAX (WHO Fracture Risk Assessment Tool) para analisar o risco de cada indivíduo e, dessa maneira, não podem ser completamente utilizadas pela população brasileira. Dessa forma, a Comissão de Osteoporose e Doenças Osteometabólicas da Sociedade Brasileira de Reumatologia, em conjunto com a Associação Médica Brasileira e a Associação Brasileira de Medicina Física e Reabilitação, implementou as diretrizes brasileiras de osteoporose induzida por glicocorticoide (OPIG), baseando-se na melhor evidência científica disponível e/ou experiência de experts. DESCRIÇÃO DO MÉTODO DE COLETA DE EVIDÊNCIA: A revisão bibliográfica de artigos científicos desta diretriz foi realizada na base de dados MEDLINE. A busca de evidência partiu de cenários clínicos reais, e utilizou as seguintes palavras-chave (MeSH terms): Osteoporosis, Osteoporosis/chemically induced*= (Glucocorticoids= Adrenal Cortex Hormones, Steroids), Glucocorticoids, Glucocorticoids/administration and dosage, Glucocorticoids/therapeutic use, Glucocorticoids/adverse effects, Prednisone/adverse effects, Dose-Response Relationship, Drug, Bone Density/drug effects, Bone Density Conservation Agents/pharmacological action, Osteoporosis/ prevention&control, Calcium, Vitamin D, Vitamin D deficiency, Calcitriol, Receptors, Calcitriol; 1-hydroxycholecalciferol, Hydroxycholecalciferols, 25-Hydroxyvitamin D3 1-alpha-hydroxylase OR Steroid Hydroxylases, Prevention and Control, Spinal fractures/prevention & control, Fractures, Spontaneous, Lumbar Vertebrae/injuries, Lifestyle, Alcohol Drinking, Smoking OR tobacco use disorder, Movement, Resistance Training, Exercise Therapy, Bone density OR Bone and Bones, Dual-Energy X-Ray Absorptiometry OR Absorptiometry Photon OR DXA, Densitometry, Radiography, (Diphosphonates Alendronate OR Risedronate Pamidronate OR propanolamines OR Ibandronate OR Zoledronic acid, Teriparatide OR PTH 1-34, Men AND premenopause, pregnancy, pregnancy outcome maternal, fetus, lactation, breast-feeding, teratogens, Children (6-12 anos), adolescence (13-18 anos). GRAU DE RECOMENDAÇÃO E FORÇA DE EVIDÊNCIA: A) Estudos experimentais e observacionais de melhor consistência; B) Estudos experimentais e observacionais de menor consistência; C) Relatos de casos (estudos não controlados); D) Opinião desprovida de avaliação crítica, com base em consensos, estudos fisiológicos ou modelos animais. OBJETIVO: Estabelecer as diretrizes para a prevenção e o tratamento da OPIG.Glucocorticoids (GC) are used in almost all medical specialties, and approximately 0.5% of the general population of the United Kingdom receives those medications. With the increased survival of patients with rheumatological diseases, morbidity secondary to the use of those medications represents an important aspect of the management of our patients. The incidences of vertebral and non-vertebral fractures are elevated, ranging from 30% to 50% of the individuals on GC for over three months. Thus, osteoporosis and frailty fractures should be prevented and treated in all patients initiating or already on GC. There are several recommendations on this topic elaborated by several international societies, but consensus still lacks. Recently, the American College of Rheumatology has published new recommendations, but they are based on the WHO Fracture Risk Assessment Tool (FRAX®) to evaluate the risk for each individual, and, thus, cannot be completely used for the Brazilian population. Thus, the Committee for Osteoporosis and Bone Metabolic Disorders of the Brazilian Society of Rheumatology, along with the Brazilian Medical Association and the Brazilian Association of Physical Medicine and Rehabilitation, has elaborated the Brazilian Guidelines for Glucocorticoid-Induced Osteoporosis (GIO), based on the better available scientific evidence and/or expert experience. METHOD OF EVIDENCE COLLECTION: The bibliographic review of scientific articles of this guideline was performed in the MEDLINE database. The search for evidence was based on real clinical scenarios, and used the following keywords (MeSH terms): Osteoporosis, Osteoporosis/ chemically induced*= (Glucocorticoids= Adrenal Cortex Hormones, Steroids), Glucocorticoids, Glucocorticoids/administration and dosage, Glucocorticoids/therapeutic use, Glucocorticoids/adverse effects, Prednisone/adverse effects, Dose-Response Relationship, Drug, Bone Density/drug effects, Bone Density Conservation Agents/pharmacological action, Osteoporosis/prevention & control, Calcium, Vitamin D, Vitamin D deficiency, Calcitriol, Receptors, Calcitriol; 1-hydroxycholecalciferol, Hydroxycholecalciferols, 25-Hydroxyvitamin D3 1-alpha-hydroxylase OR Steroid Hydroxylases, Prevention and Control, Spinal fractures/prevention & control, Fractures, Spontaneous, Lumbar Vertebrae/injuries, Lifestyle, Alcohol Drinking, Smoking OR tobacco use disorder, Movement, Resistance Training, Exercise Therapy, Bone density OR Bone and Bones, Dual-Energy X-Ray Absorptiometry OR Absorptiometry Photon OR DXA, Densitometry, Radiography, (Diphosphonates Alendronate OR Risedronate Pamidronate OR propanolamines OR Ibandronate OR Zoledronic acid, Teriparatide OR PTH 1-34, Men AND premenopause, pregnancy, pregnancy outcome maternal, fetus, lactation, breast-feeding, teratogens, Children (6-12 years), adolescence (13-18 years). GRADE OF RECOMMENDATION AND LEVEL OF EVIDENCE: A) Data derived from more consistent experimental and observational studies; B) Data derived from less consistent experimental and observational studies; C) Case reports (uncontrolled studies); D) Expert opinion without explicit critical appraisal, or based on consensus, physiological studies or animal models. OBJECTIVE: To establish guidelines for the prevention and treatment of GIO.
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- 2012
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160. A search and rescue robot with tele-operated tether docking system.
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Carlos F. Marques, João Cristóvão, Paulo Alvito, Pedro U. Lima, João Frazão, M. Isabel Ribeiro, and Rodrigo M. M. Ventura
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- 2007
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161. Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm
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Carlos A. F. Marques, Arnaldo G. Leal-Junior, Rui Min, Maria Domingues, Cátia Leitão, Paulo Antunes, Beatriz Ortega, and Paulo André
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polymer optical fibers ,fiber gratings ,polymer waveguides ,Chemicals: Manufacture, use, etc. ,TP200-248 ,Textile bleaching, dyeing, printing, etc. ,TP890-933 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 - Abstract
This paper presents the achievements and progress made on the polymer optical fiber (POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant progress has been made where the inscription times that were higher than 1 h have been reduced to 15 ns with the application of the krypton fluoride (KrF) pulsed laser operating at 248 nm and thermal treatments such as the pre-annealing of fibers. In addition, the application of dopants such as benzyl dimethyl ketal (BDK) has provided a significant decrease of the fiber inscription time. Furthermore, such improvements lead to the possibility of inscribing POF gratings in 850 nm and 600 nm, instead of only the 1550 nm region. The progress on the inscription of different types of polymer optical fiber Bragg gratings (POFBGs) such as chirped POFBGs and phase-shifted POFBGs are also reported in this review.
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- 2018
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162. Increase of upper troposphere/lower stratosphere wave baroclinicity during the second half of the 20th century
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L. Gimeno, L. de la Torre, M. L. R. Liberato, C. A. F. Marques, J. C. Antuña, J. A. Añel, and J. M. Castanheira
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
A strengthening of the equatorward temperature gradient in the upper troposphere/lower stratosphere (UTLS), at subtropics and midlatitudes, is consistently reproduced in several modelling studies of the atmospheric response to the increase of greenhouse gas radiative forcing. Some of those studies suggest an increase of the baroclinicity in the UTLS region because of the enhanced meridional temperature gradient. This study presents observational evidence of an increase of the baroclinic wave components of UTLS circulation (UTLS wave baroclinicity), during the second half of the 20th century. The evidence is given by significant positive trends in the energy of baroclinic normal modes of the NCEP/NCAR reanalysis, and significant positive trends in the UTLS eddy available potential energy of the NCEP/NCAR, ERA-40, NCEP-2 and JRA-25 reanalyses. Significant positive trends in the frequency of double tropopause events in radiosonde data are also interpreted as a manifestation of an increase of the UTLS wave baroclinicity.
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- 2009
163. Rendimiento de los productos del proceso de pirólisis en lecho fijo de los residuos de naranja del proceso de obtención de jugos concentrados en la provincia de Pinar del Río, Cuba. // Yields in pirolysis process in fixed bed of solid residues of orange i
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L. Aguiar-Trujillo, L. M. García-Rojas, F. Marques-Montesino, B. A. Ramos-Robaina, J. Arauzo-Pérez, and A. Gonzalo-Callejo
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Mechanical engineering and machinery ,TJ1-1570 - Abstract
En la Provincia de Pinar Río en Cuba, existe un residuo de la biomasa, como son los residuos sólidosde naranja del proceso de obtención de jugos concentrados. Este desecho se podría transformarpor medio de un proceso termoquímico, como es la pirólisis. No se han encontrado datos en laliteratura acerca del comportamiento de la pirólisis de este tipo de biomasa, que se utilizanormalmente para la comida animal. En este trabajo, se ha estudiado el proceso de pirólisis deestos residuos, realizando experimentos en un reactor de lecho fijo a escala de laboratorio. Elproducto obtenido (carbón, gas y el alquitrán) y la composición de la distribución de los gases hansido obtenidas para diferentes tamaños de partículas (menores a 300 micrómetros y mayores a 800micrómetros) y temperaturas del proceso 3000, 4500 y 6000 C.Los resultados fundamentales que se obtienen:Rendimiento a carbón oscila entre 25 y 35 %, Rendimiento a gas oscilan entre 21 y 29 %,Rendimiento a alquitrán entre 5 y 9 %. Los gases fundamentales que se obtienen en el proceso son:H2, CO, CH4, CO2, C2H4, C2H6, C2H2, con una energía máxima entregada entre 150 y 1000 Kcal.______________________________________________________________________________AbstractIn Pinar del Río, Cuba, a residue of the biomass exists, such as the solid residues of orange in theconcentrated juices process. This waste would be able to transform through a termo-chemicalprocess, such as in the pirolysis in fixed bed. No data in the literature about the behavior of thepirolysis of this type of biomass have been found, which is employed normally for animal feeding.In this work we has been study the pirolysis process in fixed bed of early residues, carrying outexperiments in a reactor of fixed bed to scale of laboratory. The product obtained (coal, gas andthe tar) and the composition of distribution of gases, they have been obtained for different sizes ofparticles (smaller to 300 micrometers and greater to 800 micrometers) and temperatures of theprocess (300, 450 and 600) º C.The fundamental results that are obtained:Coal yield oscillates among 25 and 35 %, Gas yield oscillate among 21 and 29 %, Tar yield oscillateamong 5 and 9 %. The fundamental gases obtained in the process are: H2, CO, CH4, CO2, C2H4,C2H6, C2H2, with energy obtained between 150 and 1000 Kcal. (SEM-EDS).
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- 2009
164. Karma: be mindful of your actions
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F. Marques, Joan
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- 2013
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165. Magnitude-frequency of sea cliff instabilities
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F. M. S. F. Marques
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Environmental technology. Sanitary engineering ,TD1-1066 ,Geography. Anthropology. Recreation ,Environmental sciences ,GE1-350 ,Geology ,QE1-996.5 - Abstract
The magnitude-frequency relationship of sea cliff failures in strong, low retreat rate cliffs, was studied using systematic historical inventories carried out in the coasts of Portugal and Morocco, in different geological and geomorphological settings, covering a wide size scale, from small to comparatively large rockslides, topples and rockfalls, at different time and spatial scales. The magnitude-frequency expressed in terms of volume displaced and of horizontal area lost at the cliff top showed good fit by inverse power laws of the type p=a.x−b, with a values from 0.2 to 0.3, and exponents b close to 1.0, similar to those proposed for rockfall inventories. The proposed power laws address the magnitude-frequency for sea cliff failures, which is an important component of hazard assessment, to be completed with adequate models for space and time hazard components. Maximum local retreat at the cliff top provided acceptable fitting to inverse power laws only for failures wider than 2m, with a = 4.0, and exponent b = 2.3, which may be useful to assess the cliff retreat hazard for the use of areas located near the cliff top.
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- 2008
166. Bacillus amyloliquefaciens COMO POTENCIAL BIOCONSERVANTE DE ALIMENTOS: DETERMINAÇÃO DO PERFIL DE PROTEÍNAS E AMINOGRAMA
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D. SCHULZ, M. R. F. MARQUES, I. C. MÜLLER, and C. R. V. BATISTA
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Bacillus amyloliquefaciens ,antimicrobianos ,proteases. ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Avaliou-se o perfil de proteínas em gel de poliacrilamida e o aminograma do extrato bruto de Bacillus amyloliquefaciens. O extrato bruto de Bacillus amyloliquefaciens foi obtido por precipitação, centrifugação, diálise e esterilização por filtração. Como microrganismo indicador foi utilizado Listeria monocytogenes NCTC 098630 a 105 UFC/mL. Na determinação da composição global de aminoácidos em eletroforese SDS (10%)/PAGE (7,5 a 20%) foram constatadas seis bandas com pesos moleculares aparentes de: 14,8; 20; 29; 30; 34 e 56,2 kDa e composto principalmente de aminoácidos hidrofóbicos (não polares), incluindo a prolina (446,77 ppm), leucina (11,03 ppm), valina (6,27 ppm), isoleucina (4,59 ppm), alanina (2,91 ppm) e glicina (1,87 ppm). Os resultados obtidos sugerem que o extrato bruto de Bacillus amyloliquefaciens é composto principalmente de proteases e outras enzimas bacteriolíticas.
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- 2008
167. Combined Effect of Phage phT4A and Pressure-Based Strategies in the Inhibition of
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Carla, Pereira, João F, Marques, Sílvia, Reis, Pedro, Costa, Ana P, Martins, Carlos A, Pinto, Jorge A, Saraiva, and Adelaide, Almeida
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The major concern regarding the bacteriophage (or phage) therapy approach is the regrowth of bacteria after treatment, a consequence of the emergence of phage-resistant mutants. However, this limitation can be overcome by combining different therapies. In this study, the potential of combining phage phT4A with pressure storage (HS) to enhance the control of
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- 2021
168. Influence of the media ionic strength on the formation and in vitro biological performance of polycation-DNA complexes
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Juan L. Paris, Filipe Coelho, Eduardo F. Marques, Cláudia Botelho, Bruno F. B. Silva, and Universidade do Minho
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Salt ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Polycation ,chemistry.chemical_compound ,Colloid ,In vivo ,Ionic strength ,Materials Chemistry ,Physical and Theoretical Chemistry ,Spectroscopy ,Polyethylenimine ,Science & Technology ,Cationic polymerization ,Transfection ,DNA ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Non-viral gene delivery ,Atomic and Molecular Physics, and Optics ,In vitro ,0104 chemical sciences ,3. Good health ,Electronic, Optical and Magnetic Materials ,chemistry ,Biophysics ,0210 nano-technology ,Polyplexes - Abstract
Available online 26 October 2021, Cationic polymer-DNA complexes, or polyplexes, have been subject to intensive investigation as potentially efficient non-viral systems for gene therapy. Yet the effects of ionic strength, a physiologically relevant parameter, on the formation, physicochemical properties (e.g. size and colloidal stability) and transfection efficiency of polyplexes are still poorly investigated and understood. In this work, we analyze the effect of ionic strength on the formation and transfection efficiency of poly-L-lysine (PLL), branched polyethylenimine (PEI) and bioreducible poly-L-Lysine (bPLL) polycations complexed with plasmid DNA, using different preparation paths. In path I, the polycation and DNA are mixed in water and transferred to saline media afterwards. In path II, the polycation and DNA are mixed already in the presence of salt. Despite that the final compositions are identical, for monovalent salt (NaCl) concentrations 70 mM, the two pathways give rise to polyplexes with different sizes and stability. Path I polyplexes are smaller and colloidally more stable than their path II analogues, irrespective of polycation. Regarding the different polycations used, PLL-DNA polyplexes are smaller and more stable than PEI-polyplexes, regardless of path, while bPLL-DNA particles aggregate very easily in saline media. Conversely, when applied to 2D A549 cell cultures, the two assembly pathways do not show significant differences in transfection efficiency, but regarding cellular-uptake, PEI and path I offer better results. Overall, we show that slight differences in ionic strength at the time of polyplex formation strongly influence the size and stability of polycation-DNA complexes, but they do not translate into significant differences in the transfection of 2D in vitro A549 cell-cultures. Notwithstanding, caution should be exercised as the size differences observed could impact transfection in more complex in vivo models., This research is supported by Microfluidic Layer-by-layer Assembly of Cationic Liposome - Nucleic Acid Nanoparticles for Gene Delivery project (032520) co-funded by FCT and the ERDF through COMPETE2020.Additional financial support was provided by Norte2020 Funding Program, N2020-PE—Nanotechnology-Based Functional Solutions (NBFS) project under contract no. NORTE-01-0145-FEDER-000019. JLP was supported by the post-doctoral fellowship from the Ramón Areces Foundation, reference BEVP30A5827. FCT is also acknowledged for financial support through project UIDB/00081/2020., info:eu-repo/semantics/publishedVersion
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- 2021
169. A EXPOSIÇÃO AO AÇÚCAR NOS PRIMEIROS 2 ANOS DE VIDA COMO INFLUÊNCIA NO PALADAR DA CRIANÇA
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R. M. Camargo, L. S. Zacharias, P. S. Oliveira, T. F. Marques, F. F. Danziato, D. C. L. Masquio, and V. Tonetto-Fernandes
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- 2021
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170. Aplica����o da F��sica Moderna por Meio da Espectroscopia: no Ensino em Sala de Aula
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E. P. Paiva, Vitor, G. de Oliveira, Augusto, W. N. de Souza, Douglas, and T. F. Marques, Pedro
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Mat��ria ,Ensino M��dio ,Espectroscopia - Abstract
F��sica Moderna no Ensino M��dio? Atualmente, aulas pr��ticas se caracterizam como a nova sensa����o do momento. Ouvimos dizer que aulas expositivas est��o ultrapassadas, sendo necess��rio o envolvimento dos alunos em aulas experimentais. No entanto, por muitas das vezes, alguns professores se perdem em seu prop��sito e lan��am-se no modismo vigente. Diante disso, at�� onde podemos relacionar a teoria e a pr��tica em sala de aula? Ser�� mesmo que as aulas experimentais s��o a ���salvadora da p��tria���? O objetivo deste ensaio te��rico foi caracterizar as produ����es cient��ficas acerca da utiliza����o da espectroscopia com aplica����o em t��picos de F��sica Moderna no Encontro Nacional de Pesquisa em Educa����o em Ci��ncias - ENPEC e Simp��sio Nacional de Ensino de F��sica - SNEF ao longo de 10 anos. Utilizamos como metodologia o Estado da Arte, onde os bancos de dados escolhidos consistiram nas atas do SNEF e do ENPEC. Encontramos 5.815 produ����es, as quais foram publicadas nos eventos neste recorte temporal. Contudo, apenas nos anos de 2013 e 2015 verificamos produ����es que se relacionam com a tem��tica, as quais somam 3 (0,27%) trabalhos dos 1200 publicados nas duas edi����es. Percebemos que as produ����es se concentram na regi��o sudeste do pa��s, n��o encontrando nenhuma produ����o na regi��o norte, especificamente, no estado do Amazonas. Mediante as an��lises do segundo momento metodol��gico, pudemos perceber que todas as pesquisas apontam aspectos emp��rico-indutivistas e distanciam-se dos objetivos de uma alfabetiza����o cient��fica. Desse modo, acreditamos que o processo de ensino dos conceitos de F��sica Moderna com o uso de espectroscopia pode ser permeado por metodologias, as quais podem ser definidas pelo professor, a partir do momento em que ele entende como o seu aluno aprende.
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- 2021
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171. Acción anti-apoptótica de un calostro bovino en un modelo celular de osteoporosis
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Martín-Aragón S, Bermejo-Bescós P, Raposo C, F, Marques, Gkiata P, Koutedakis Y, Ntina G, T, Amorim, and Prieto P
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La osteoporosis inducida por glucocorticoides es una de las formas secundarias más comunes de osteoporosis, debida en parte a la apoptosis de osteoblastos y osteocitos. En el presente trabajo, se han investigado los efectos de un calostro bovino en un modelo celular de osteoporosis obtenido a partir de la exposición de células osteoblásticas MC3T3-E1 a la DEX, en un rango de concentración (0-700 μM). El co-tratamiento de las células con el calostro bovino se realizó a una concentración de 0,1-5,0 mg/mL. Se determinó la activación de la caspasa-3 para evaluar el grado de apoptosis de los osteoblastos bajo la exposición a DEX y su posible prevención mediante el co-tratamiento con calostro. Se midieron los niveles de glutation reducido (GSH) para determinar si la apoptosis mediada por el estrés oxidativo de la DEX se veía disminuida por el co-tratamiento con calostro. Finalmente, mediante Western blot, se determinaron los niveles de las proteínas p-ERK1/2, Bcl-XL, Bax y Hsp70 tras la exposición a DEX o DEX más calostro. El calostro evitó la disminución de la viabilidad celular y el aumento de la activación de la caspasa-3 y el estrés oxidativo, causados por la exposición a la DEX. Las células sometidas a un tratamiento conjunto de calostro y DEX mostraron mayores niveles de p-ERK1/2 y menores niveles de Bcl-XL, Bax y Hsp70. Estos resultados prueban que el calostro posee capacidad de reducir la apoptosis inducida por DEX posiblemente a través de la activación de la vía ERK y la modulación del sistema Hsp70.
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- 2021
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172. Avoiding obstacles - multisensor navigation for nonholonomic robots in cluttered environments.
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Carlos F. Marques and Pedro U. Lima
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- 2004
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173. Tolerância ao sal e às altas temperaturas de estirpes de Sinorhizobium provenientes de zonas secas do Alentejo Salt and temperature tolerance of Sinorhizobium strains isolated from dry environments in Alentejo
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P. Fareleira, N. Matos, E. Ferreira, and J. F. Marques
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Agriculture - Abstract
O trabalho teve como principal objectivo a obtenção de estirpes de rizóbio adequadas à nodulação de luzernas anuais e adaptadas a sobreviver nas condições ambientais susceptíveis de ocorrer em solos degradados. Dado que as populações de rizóbio apresentam variabilidade considerável no que respeita à tolerância a factores ambientais, os estudos focaram-se na pesquisa e na selecção de estirpes resistentes a condições adversas. Efectuaram-se colheitas de solos em diversas zonas no sul do País, seleccionando-se locais afectados por secura, temperaturas elevadas e, pontualmente, salinidade. A partir destes solos, isolaram-se estirpes de rizóbio, usando como planta hospedeira a luzerna anual Medicago polymorpha. Estudaram-se os efeitos de condições de stresse ambiental, como a salinidade e as altas temperaturas, no crescimento das estirpes isoladas. Dos 41 isolamentos analisados, 11 apresentaram crescimento em meio con-tendo 1,4 M de cloreto de sódio e suplementado com 10% de extracto de terra, e 22 cresceram quando incubadas a 45 ºC em meio sem aditivos. Três estirpes mostraram ter capacidade para crescer sob os efeitos conjuntos da salinidade e da alta temperatura. A análise de extractos etanólicos de estirpes tolerantes à salinidade revelou, na maior parte dos casos, a acumulação, induzida pelo sal, dos solutos compatíveis de Sinorhizobium: o dipéptido N - acetilglutaminilglutamina amida, vários tipos de betaínas, trealose, glutamato e prolina. A observação, por NMR de 31P in vivo, de uma estirpe tolerante ao sal, proveniente de um solo xistoso de baixo teor em fósforo, mostrou a presença de níveis elevados de reservas intracelulares de fosfato inorgânico (polifosfato), sugerindo um bom potencial para utilização em solos onde os riscos de salinização se conjuguem com deficiências em fósforo assimilável.The main objective of this work was to obtain rhizobial strains able to nodulate annual medics and highly adapted to the environmental conditions present in degraded soils. Since populations of rhizobia vary in their tolerance to environmental factors, screening for resistant strains was pursued. Soil samples were collected in different regions in Southern Portugal, severely affected by drought, high temperatures, and, in some places, salinity; rhizobial strains were isolated using Medicago polymorpha as trap-host. The effects of environmental stressful conditions, such as salinity or high temperatures, in the growth of the isolated strains were studied. Among the 41 isolates that were ana-lysed here, 11 showed good growth capacity in the presence of 1.4 M sodium chloride and 10% soil extract, and 22 could grow upon incubation at 45 ºC. Three strains were able to grow under the simultaneous effects of salinity and high temperature. NMR analysis of ethanolic cell-free extracts of salt tolerant strains showed that, in most cases, cell growth in medium containing high salt concentrations resulted in the accumulation of the compatible solutes described for Sinorhizobium: the dipeptide N-acetylglutaminylglutamine amide, betaines, trehalose, glutamate, and proline. Analysis by in vivo 31P-NMR of a salt tolerant strain originated from a schistous soil with low-phosphorus content, revealed the presence of high levels of intracellular inorganic phosphate reserves (polyphosphates). This suggests a high potential for the utilization of the strain in soils affected by both salinity and phosphorus deficiency.
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- 2007
174. Avaliação da qualidade microbiológica da água do açude Engenheiro Ávidos, Cajazeiras-PB
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A. E. F. Marques, T. S. S. Almeida, A. dos S. Araújo, E. A. Sousa Filho, and A. C. B. Vieira
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Qualidade de água. Microbiologia. Coliforme fecal. ,Agriculture (General) ,S1-972 ,Geography. Anthropology. Recreation ,Environmental sciences ,GE1-350 - Abstract
A água é um recurso renovável de extrema importância para sobrevivência e manutenção das espécies, assim como preservação da fauna e flora. Nos últimos anos o homem vem modificando o ecossistema, através do desmatamento e crescimento dos centros urbanos que causam diferentes tipos de poluição, causando um grande desperdício e contaminação da água. Nesse contexto, é essencial conhecer a qualidade da água que é consumida em uma cidade. Por isto, neste trabalho, objetivou-se realizar uma avaliação da qualidade bacteriológica da água do açude Engenheiro Ávidos que abastece a cidade de Cajazeiras - PB. O trabalho foi realizado através de estudo aplicado do tipo exploratório quantitativo, no qual foi analisada a presença de bactérias heterotróficas a partir de contaminação fecal, ou seja, esgotos não tratados. Foram coletadas três amostras em diferentes pontos do açude, sendo estes: entrada do açude, proximidade das habitações e paredão. Após análise foi possível identificar que o açude Engenheiro Ávidos encontra-se dentro dos parâmetros exigidos pelo CONAMA, uma vez que apresentou 150 (entrada do açude), 30 (habitações) e 0 (no paredão) coliformes a cada 100 mL de água, identificando ainda sim, uma elevação na quantidade de micro-rganismos na região da entrada do açude, o que pode ser explicado pela proximidade com a cidade de São José de Piranhas e possíveis esgotos. Nesse contexto é enfatizada a importância do monitoramento das águas que são destinadas, principalmente, ao consumo humano, atuando de forma preventiva sobre contaminações ao homem. Quality Assessment of microbiological reservoir water Engenheiro Ávidos, Cajazeiras-PB Abstract: The water is a renewable resource of paramount importance for the survival and maintenance of the species, as well as preservation of fauna and flora. In recent years man has been changing the ecosystem, through deforestation and growth of urban centers causing different types of pollution, causing a great waste and water contamination. In this context, it is essential to know the quality of water that is consumed in a city. Therefore, this study aimed to carry out an assessment of the bacteriological water quality of the weir Engenheiro Avidos that supplies the city of Cajazeiras - PB. The work was performed by the quantitative study applied exploratory, in which they analyzed the presence of heterotrophic bacteria from fecal contamination, in other words, untreated sewage. Three samples were collected at different points of the weir, these being: intake weir, proximity to housing and seawall. After analysis it was identified that the weir Engenheiro Avidos is within the parameters required by CONAMA, since were identified 150 (intake weir), 30 (housing) and 0 (the breakwater) coliforms per 100 ml of water, while also being among the values allowed by CONAMA, identifying yet, an elevation the amount of micro-organisms in the intake weir, which can be explained by the proximity to the town of São José de Piranhas and possible sewage. In this context is emphasized the importance of water quality monitoring that are designed primarily for human consumption, acting preventively about contamination to man.
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- 2015
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175. APLICAÇÃO DO MÉTODO DE ELETRORRESISTIVIDADE (CE) EM ÁREA DE RISCO GEOTÉCNICO EM TERRENO CÁRSTICO, NOBRES - MT
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R. S. S. Duarte, M. V. F Marques, A. L. Moraes, and J. R. Ribeiro
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River, lake, and water-supply engineering (General) ,TC401-506 ,Physical geography ,GB3-5030 - Abstract
A área pesquisada situa-se ao SW do Cráton Amazônico, na zona externa da Faixa Paraguai, na região centro sul do Estado de Mato Grosso em uma área dominada por metassedimentos proterozóicos. A cidade de Nobres se sobrepõe as rochas do Grupo Alto Paraguai, composto pelas formações Araras, Raizama e Diamantino. A metodologia utilizada neste trabalho foi baseada nos princípios geofísicos da eletroresistividade, utilizando o método de Caminhamento Elétrico com arranjo dipolo-dipolo. O CE tem por objetivo investigar a variação horizontal de resistividade em varias profundidades. Com o método do Caminhamento Elétrico foram realizados três perfis de resistividade. A aplicação dos métodos de eletroresistividade na interpretação geofísico-geológica de terrenos cársticos, tem se revelado útil, considerando a possibilidade de identificação e dimensionamento de feições de dissolução tais como fraturas, vazios ou cavidades. As modelagens bidimensional possibilitam a avaliação indireta do contexto estrutural-geotécnico do terreno em estudo. O objetivo do trabalho consistiu na identificação e avaliação das formas e dimensões destas feições cársticas na cidade de Nobres – MT.
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- 2015
176. Phase-locking flows between orthogonally stretching parallel plates
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B. Wang, R. Ayats, A. Meseguer, F. Marques, Universitat Politècnica de Catalunya. Doctorat en Física Computacional i Aplicada, Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. DF-GeoTech - Dinàmica de Fluids i Aplicacions Geofísiques i Tecnològiques
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Fluid Flow and Transfer Processes ,Oscillations ,Física::Física de fluids [Àrees temàtiques de la UPC] ,Chaotic dynamics ,Mechanical Engineering ,Computational Mechanics ,Condensed Matter Physics ,Navier Stokes equations ,Linear stability analysis ,Mechanics of Materials ,Dynamical systems ,Oscil·lacions ,Navier-Stokes equations ,Equacions de Navier-Stokes ,Oscillating flow - Abstract
In this paper, we explore the stability and dynamical relevance of a wide variety of steady, time-periodic, quasiperiodic, and chaotic flows arising between orthogonally stretching parallel plates. We first explore the stability of all the steady flow solution families formerly identified by Ayats et al. [“Flows between orthogonally stretching parallel plates,” Phys. Fluids 33, 024103 (2021)], concluding that only the one that originates from the Stokesian approximation is actually stable. When both plates are shrinking at identical or nearly the same deceleration rates, this Stokesian flow exhibits a Hopf bifurcation that leads to stable time-periodic regimes. The resulting time-periodic orbits or flows are tracked for different Reynolds numbers and stretching rates while monitoring their Floquet exponents to identify secondary instabilities. It is found that these time-periodic flows also exhibit Neimark–Sacker bifurcations, generating stable quasiperiodic flows (tori) that may sometimes give rise to chaotic dynamics through a Ruelle–Takens–Newhouse scenario. However, chaotic dynamics is unusually observed, as the quasiperiodic flows generally become phase-locked through a resonance mechanism before a strange attractor may arise, thus restoring the time-periodicity of the flow. In this work, we have identified and tracked four different resonance regions, also known as Arnold tongues or horns. In particular, the 1 : 4 strong resonance region is explored in great detail, where the identified scenarios are in very good agreement with normal form theory.
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- 2022
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177. Genetic and morphologic differentiation of the Lusitanian toadfish (Halobatrachus didactylus) between estuarine and coastal areas in Portugal
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Joana F. Marques, Ana Luísa Rego, José Lino Costa, Maria José Costa, and Henrique N. Cabral
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halobatrachus didactylus differentiation ,allozymes ,morphology ,population structure ,coastal areas ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
The Lusitanian toadfish, Halobatrachus didactylus (Bloch and Schneider, 1801), is distributed from the Ghana coast to the Iberian Peninsula, being particularly abundant on the south coast of Portugal. The differentiation of this species along the Portuguese coast was assessed through the analysis of 10 samples, considering morphological characters (20 morphometric and 16 meristic) and genetic markers (10 allozymes, 11 loci). Southern samples included estuaries and their adjacent coastal areas, given that this species inhabits both environments, whereas western samples only comprised estuaries. Morphometric and meristic data discriminant analysis evidenced some differentiation between estuarine and coastal populations. This was not entirely corroborated by the genetic analysis, which showed an overall pattern of low FST (0.042) and Nei’s genetic distance, even between geographically distant areas. However, higher values of these parameters were found between estuaries of the south coast and their adjacent coastal areas, suggesting that estuarine systems play a major role in such differentiation. Results are discussed regarding toadfish life-history pattern and Portuguese coast geomorphology, giving an insight into the biological and environmental factors influencing population sub-structuring.
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- 2006
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178. Esporos e toxinas de Clostridium botulinum dos tipos C e D em cacimbas no Vale do Araguaia, Goiás
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Aires M. Souza, Dercino F. Marques, Jürgen Döbereiner, and Iveraldo S. Dutra
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Clostridium botulinum ,esporos ,toxina botulínica ,botulismo ,contaminação hídrica ,cacimbas ,bovinos ,Veterinary medicine ,SF600-1100 - Abstract
Foram avaliadas a ocorrência e distribuição de esporos e toxinas de Clostridium botulinum tipos C e D em 300 cacimbas empregadas como bebedouro de bovinos em 130 propriedades rurais localizadas em 12 municípios do Vale do Araguaia, Estado de Goiás. A presença de esporos foi determinada indiretamente pelo cultivo em meio de cultura, seguido da inoculação e neutralização em camundongo das amostras de sedimento do interior das cacimbas, e do solo superficial e fezes de bovinos, coletadas ao seu redor. A presença de toxina foi avaliada diretamente pela inoculação em camundongo do sedimento filtrado das cacimbas, também seguida da neutralização em camundongo com antitoxinas C e D. A presença de esporos de C. botulinum foi significativamente maior (p
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- 2006
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179. Low-Cost Interrogation Technique for Dynamic Measurements with FBG-Based Devices.
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Camilo A. R. Díaz, Cátia Sofia Jorge Leitão, Carlos A. F. Marques 0001, Maria de Fátima Domingues, Nélia Alberto, Maria José Pontes, Anselmo Frizera, Moisés R. N. Ribeiro, Paulo Sérgio de Brito André, and Paulo Fernando da Costa Antunes
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- 2017
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180. Synchronization of application-driven WSN.
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Bruno F. Marques and Manuel Ricardo 0001
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- 2017
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181. Recursos próprios da UNB, o financiamento das IFES e a reforma da educação superior The University of Brasília own revenues, the financing of FISHE and the higher education reform
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Jacques Velloso and Paulo Marcello F. Marques
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Recursos próprios da universidade ,Financiamento da educação superior ,Universidade de Brasília ,Instituições Federais de Ensino Superior (IFES) ,Reforma da educação superior ,University own revenues ,Financing of higher education ,University of Brasilia ,Federal Institutions of Higher Education (FISHE) ,Higher education reform ,Education (General) ,L7-991 - Abstract
texto discute o comportamento de despesas da Universidade de Brasília (UNB), enfatizando as receitas próprias, no cenário do financiamento das Instituições Federais de Ensino Superior (IFES), e trata das fundações de apoio em anteprojetos de reforma da educação superior do Governo Lula. O financiamento da UNB com verbas do MEC não difere muito do observado nas IFES, predominando recursos cadentes num sistema em expansão, no contexto da crise de hegemonia da universidade e de políticas voltadas para uma heterogeneidade no sistema federal. A UNB tem alta proporção de gastos com receitas próprias, vem tendo crescente dependência destas, mas a maioria é consumida na sua geração, mostrando que nenhuma universidade federal de qualidade pode prescindir dos recursos da União. O primeiro dos anteprojetos trouxe notáveis inovações no financiamento das IFES, mas o segundo renunciou a muitas das propostas originais. Exigiu transparência na atuação das fundações de apoio, subordinação a colegiados superiores e sinalizou longinquamente para uma futura reforma da gestão financeira e patrimonial.The text analyses the behavior of expenditures of the University of Brasília (UNB), emphasizing its own revenues, in the context of the financing of Federal Institutions of Higher Education (FISHE), and deals with the university support foundations in preliminary proposals for a higher education reform bill of President Lula Government Administration. The public funding of UNB does not differ substantially from that of FISHE, in which falling resources relative to enrollment growth have prevailed; these are viewed within the framework of a hegemonic crisis of the university and of policies aimed to heterogeneity in the federal system. UNB has a high share of expenditures with its own revenues, and has been increasingly dependent on them, but most has been used up in their production, indicating that public funding is the key to quality standards. The first proposal for a higher education bill brought remarkable innovations for the financing of FISHE, but the second rejected many of the original innovations. It demanded transparency on the actuation of the university support foundations, and their subordination to parent institutions; it also remotely waved towards a future reform of the rules governing the management of FISHE finance.
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- 2005
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182. Ouabain exacerbates activation-induced cell death in human peripheral blood lymphocytes
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Mabel B. Esteves, Luis F. Marques-Santos, Ottília R. Affonso-Mitidieri, and Vivian M. Rumjanek
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linfócitos ,ouabaína ,PHA ,apoptose ,despolarização de membrana ,lymphocytes ,ouabain ,apoptosis ,membrane depolarization ,Science - Abstract
Lymphocytes activated by mitogenic lectins display changes in transmembrane potential, an elevation in the cytoplasmic Ca2+ concentrations, proliferation and/or activation induced cell death. Low concentrations of ouabain (an inhibitor of Na+,K+-ATPase) suppress mitogen-induced proliferation and increases cell death. To understand the mechanisms involved, a number of parameters were analyzed using fluorescent probes and flow cytometry. The addition of 100nM ouabain to cultures of peripheral blood lymphocytes activated with 5µg/ml phytohemagglutinin (PHA) did not modify the increased expression of the Fas receptor or its ligand FasL induced by the mitogen. However, treatment with ouabain potentiated apoptosis induced by an anti-Fas agonist antibody. A synergy between ouabain and PHA was also observed with regard to plasma membrane depolarization. PHA per se did not induce dissipation of mitochondrial membrane potential but when cells were also exposed to ouabain a marked depolarization could be observed, and this was a late event. It is possible that the inhibitory effect of ouabain on activated peripheral blood lymphocytes involves the potentiation of some of the steps of the apoptotic process and reflects an exacerbation of the mechanism of activation-induced cell death.Quando linfócitos são ativados por lectinas mitogênicas apresentam mudanças do potencial de membrana, elevação das concentrações citoplasmáticas de cálcio, proliferação e/ou morte celular induzida por ativação (AICD). Concentrações baixas de ouabaína (um inibidor da Na,K-ATPase) suprimem a proliferação induzida por mitógenos e aumentam a morte celular. Para entender os mecanismos envolvidos, uma série de parâmetros foram avaliados usando sondas fluorescentes e citometria de fluxo. A adição de 100nM de ouabaína para culturas de linfócitos de sangue periférico ativadas por fitohemaglutinina (PHA) não modificou o aumento de expressão do receptor Fas ou de seu ligante FasL induzida pelo mitógeno. No entanto, o tratamento com ouabaína potenciou a apoptose induzida por um anticorpo anti-Fas funcionando como agonista. Um sinergismo entre ouabaína e PHA também foi observado com relação à despolarização da membrana plasmática. Com relação à membrana mitocondrial, PHA por si só não produziu despolarização, mas quando as células foram também expostas à ouabaina uma dissipação do potencial foi observado, mas isso foi um evento tardio. É possível que o efeito inibitório da ouabaína em linfócitos de sangue periférico ativados envolva a potencialização de alguns aspectos do processo apoptótico e reflita uma exacerbação do mecanismo de AICD.
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- 2005
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183. Omni-directional catadioptric vision for soccer robots.
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Pedro U. Lima, Andrea Bonarini, Carlos Machado 0001, Fabio M. Marchese, Carlos F. Marques, A. Fernando Ribeiro, and Domenico G. Sorrenti
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- 2001
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184. Nuclear chromosome locations dictate segregation error frequencies
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Sjoerd J, Klaasen, My Anh, Truong, Richard H, van Jaarsveld, Isabella, Koprivec, Valentina, Štimac, Sippe G, de Vries, Patrik, Risteski, Snježana, Kodba, Kruno, Vukušić, Kim L, de Luca, Joana F, Marques, Elianne M, Gerrits, Bjorn, Bakker, Floris, Foijer, Jop, Kind, Iva M, Tolić, Susanne M A, Lens, and Geert J P L, Kops
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Chromothripsis ,Mitosis ,Sequence Analysis, DNA ,Aneuploidy ,Chromosomes ,Cell Line ,Organoids ,CRISPR-Associated Protein 9 ,Cell Line, Tumor ,Chromosome Segregation ,Neoplasms ,Humans ,Growth and Development ,Single-Cell Analysis ,Chromosome Positioning ,Interphase ,Micronuclei, Chromosome-Defective - Abstract
Chromosome segregation errors during cell divisions generate aneuploidies and micronuclei, which can undergo extensive chromosomal rearrangements such as chromothripsis
- Published
- 2021
185. POS-892 Presentation and Outcomes of Chronic Kidney Disease patients with COVID-19
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C. BRANCO, I. Duarte, J. Gameiro, C. Costa, F. Marques, J. OIiveira, B. João, J.N. Fonseca, C. Carreiro, S. Braz, and J.A. Lopes
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Nephrology - Published
- 2022
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186. POS-858 IMPACT OF ACUTE KIDNEY DISEASE ON MORTALITY OF HOSPITALIZED COVID-19 PATIENTS
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F. MARQUES, J. Gameiro, J. Oliveira, J. Fonseca, I. Duarte, J. Bernardo, C. Branco, C. Costa, S. Braz, C. Carreiro, and J. Lopes
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Nephrology - Published
- 2022
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187. POS-030 A RISK PREDICTION SCORE FOR RENAL REPLACEMENT THERAPY IN CRITICALLY ILL SEPTIC - ACUTE KIDNEY INJURY
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F. MARQUES, J. Fonseca, J. Gameiro, J. Gouveia, and J. Lopes
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Nephrology - Published
- 2022
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188. Facultative cleaning behaviour of juvenile Diplodus sargus (Sparidae) and its ecological role in marine temperate waters
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Regina Bispo, Diana Vieira, Marta Araújo, David Abecasis, J. R. F. Marques, Leonel Serrano Gordo, Joana Isabel Robalo, José Neto, Frederico Almada, CMA - Centro de Matemática e Aplicações, and DM - Departamento de Matemática
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Facultative ,Ecology ,Sparidae ,biology ,Temperate communities ,Diplodus ,Aquatic Science ,biology.organism_classification ,Cleaner fish ,4 Symbiosis ,Symbiosis ,Temperate climate ,Juvenile ,SDG 14 - Life Below Water ,Ectoparasites ,White seabream ,Ecology, Evolution, Behavior and Systematics ,Sargus - Abstract
The diversity and abundance of cleaner species have been frequently associated with ectoparasite load and ecological wealth of tropical fish communities. Cleaning behaviour in temperate regions has received less attention, with few labrid species being described as cleaners. The context and frequency of cleaning behaviour by juvenile white seabream Diplodus sargus are described. Surface observations from pontoons in yachting marinas were carried out based on a method used in a recent first report of cleaning behaviour by this northeastern Atlantic and Mediterranean sparid. A total of 51 h of observations revealed that these juveniles (
- Published
- 2019
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189. Abstracts of the 55th Congress of the European Societies of Toxicology (EUROTOX 2019) TOXICOLOGY SCIENCE PROVIDING SOLUTIONS
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Francesco Pennisi, Penny Nymark, Rita Roque, Anna Daniel-Wojcik, Johanna Koivisto, Rui Malheiro, Federica Di Giacinto, Ana Carvalho, Joana Rodrigues, Sofia De Azeredo Pereira, Miriam Berti, Daniela Zezza, ATHINA STAVROULAKI, Maria Enea, Cátia F. Marques, Vera Silva, Joana Isabel Monteiro Pinto, Diana Dias da Silva, Flávio Dionísio, Sofia Benfeito, Dominika Gądarowska, and Leonid Gurevich
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Materials science ,Nanotechnology ,General Medicine ,Macro ,Toxicology - Published
- 2019
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190. Gemini surfactants as efficient dispersants of multiwalled carbon nanotubes: Interplay of molecular parameters on nanotube dispersibility and debundling
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Ricardo M.F. Fernandes, István Furó, Eduardo F. Marques, Bárbara Abreu, Oren Regev, and Jessica Rocha
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Nanotube ,Aqueous solution ,Materials science ,02 engineering and technology ,Carbon nanotube ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Multiwalled carbon ,01 natural sciences ,Dispersant ,Exfoliation joint ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Biomaterials ,Colloid and Surface Chemistry ,Adsorption ,Chemical engineering ,law ,Molecule ,0210 nano-technology - Abstract
Surfactants have been widely employed to debundle, disperse and stabilize carbon nanotubes in aqueous solvents. Yet, a thorough understanding of the dispersing mechanisms at molecular level is still warranted. Herein, we investigated the influence of the molecular structure of gemini surfactants on the dispersibility of multiwalled carbon nanotubes (MWNTs). We used dicationic n-s-n gemini surfactants, varying n and s, the number of alkyl tail and alkyl spacer carbons, respectively; for comparisons, single-tailed surfactant homologues were also studied. Detailed curves of dispersed MWNT concentration vs. surfactant concentration were obtained through a stringently controlled experimental procedure, allowing for molecular insight. The gemini are found to be much more efficient dispersants than their single-tailed homologues, i.e. lower surfactant concentration is needed to attain the maximum dispersed MWNT concentration. In general, the spacer length has a comparatively higher influence on the dispersing efficiency than the tail length. Further, scanning electron microscopy imaging shows a sizeable degree of MWNT debundling by the gemini surfactants in the obtained dispersions. Our observations also point to an adsorption process that does not entail the formation of micelle-like aggregates on the nanotube surface, but rather coverage by individual molecules, among which the ones that seem to be able to adapt best to the nanotube surface provide the highest efficiency. These studies are relevant for the rational design and choice of optimal dispersants for carbon nanomaterials and other similarly water-insoluble materials.
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- 2019
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191. From single gemini surfactants in water to catanionic mixtures with the bile salt sodium taurodeoxycholate: Extensive micellar solutions, coacervation and liquid crystal polymorphism as revealed by phase behavior studies
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Yujie Wang, Eduardo F. Marques, and Ricardo M.F. Fernandes
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Aqueous solution ,Coacervate ,Chemistry ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Micelle ,Atomic and Molecular Physics, and Optics ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Chemical engineering ,Pulmonary surfactant ,Liquid crystal ,Phase (matter) ,Amphiphile ,Micellar solutions ,Materials Chemistry ,Physical and Theoretical Chemistry ,0210 nano-technology ,Spectroscopy - Abstract
Gemini surfactants and bile acid salts are interesting amphiphiles owing to their unconventional and versatile molecular structure, and consequent unusual aggregation properties. In this work, we investigated the phase behavior of binary surfactant/water systems for the cationic bis-quat gemini surfactants 12-2-12 (short spacer) and 12-6-12 (intermediate spacer) and subsequently catanionic mixtures of each gemini surfactant and the bile salt sodium taurodeoxycholate, STDC. The phase diagrams and phase structure were unraveled by polarized light microscopy, differential scanning calorimetry, deuterium NMR and small angle X-ray scattering. The 12-2-12 and 12-6-12 gemini form a micellar-lamellar-cubic and micellar-hexagonal-cubic phase sequence, respectively, denoting the strong influence of the spacer length on the self-assembly properties. Both the catanionic 12-2-12/STDC/water and 12-6-12/STDC/water systems display a rich mesomorphic behavior. One of the most striking features is that the STDC micelles are able to incorporate enormous amounts of gemini surfactant, forming an extremely wide solution region of mixed micellar structures. By contrast, the gemini micelles can only solubilize limited amounts of STDC. The liquid crystalline phases from the binary systems incorporate sizeable amounts of the counterpart surfactant, forming mixed catanionic aggregates at high concentration. Interestingly, the dilute region of both systems is dominated by liquid-liquid phase separation implying the formation of aqueous two-phase micellar systems. The observed features are qualitatively rationalized in terms of packing and electrostatic effects between the surfactants at play.
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- 2019
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192. Manejo anestésico del síndrome de Brugada para cesárea: cuando menos es más
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Mariana Luís, F. Lança, and F. Marques da Costa
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Anesthesiology and Pain Medicine ,business.industry ,Medicine ,Critical Care and Intensive Care Medicine ,business ,Humanities - Abstract
Resumen El sindrome de Brugada (SBr) es una condicion infrecuente y de alto riesgo que rara vez se encuentra en la sala de partos. Las pacientes embarazadas con SBr se benefician de las dosis mas bajas posibles de farmacos arritmogenicos, como los anestesicos locales. Sobre la base de esta premisa, el siguiente caso expone como un abordaje subaracnoideo podria ser una tecnica deseable en los procedimientos de cesarea para pacientes con SBr. El manejo del dolor y la ansiedad es prioritario en esta poblacion especifica. La planificacion periparto, con una cita previa de anestesiologia, y la atencion multidisciplinaria en las instalaciones de hospitales terciarios son cruciales para evitar complicaciones.
- Published
- 2019
- Full Text
- View/download PDF
193. Anaesthetic management of C-section in Brugada syndrome: When less is more
- Author
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Mariana Luís, F. Marques da Costa, and F. Lança
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Anaesthetic management ,medicine.medical_specialty ,business.industry ,fungi ,Delivery room ,Section (typography) ,General Medicine ,030204 cardiovascular system & hematology ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,030202 anesthesiology ,Anesthesiology ,medicine ,Anxiety ,medicine.symptom ,Intensive care medicine ,business ,Specific population ,Brugada syndrome - Abstract
Brugada Syndrome (BrS) is a rare and high risk condition, seldom encountered in the delivery room. Pregnant patients with BrS benefit from the lowest possible doses of arrhythmogenic drugs such as local anesthetics. Based on this premise, the following case report exposes how a subarachnoid approach might be a desirable technique in C-section procedures for BrS patients. Pain and anxiety management are priorities in this specific population. Peri-partum planning, with a previous anesthesiology appointment and mutidisciplinary care in tertiary hospital facilities are crucial to avoid complications.
- Published
- 2019
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194. Management of biliary acute pancreatitis
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B. Godart, L. Barbier, A.-G. Le Bayon-Bréard, M. Bougard, F. Marques, and E. Salamé
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medicine.medical_specialty ,Resuscitation ,Multiple Organ Failure ,medicine.medical_treatment ,Gallstones ,Severity of Illness Index ,Enteral administration ,Enteral Nutrition ,Cholelithiasis ,Pregnancy ,Pancreatic Pseudocyst ,medicine ,Humans ,Vascular Diseases ,Ultrasonography ,Cholangiopancreatography, Endoscopic Retrograde ,Endoscopic retrograde cholangiopancreatography ,medicine.diagnostic_test ,Pancreatitis, Acute Necrotizing ,business.industry ,Alanine Transaminase ,General Medicine ,Length of Stay ,medicine.disease ,Systemic Inflammatory Response Syndrome ,Surgery ,Pregnancy Complications ,Systemic inflammatory response syndrome ,Choledocholithiasis ,Pancreatitis ,Drainage ,Acute pancreatitis ,Female ,Cholecystectomy ,Intra-Abdominal Hypertension ,Tomography, X-Ray Computed ,business ,Biomarkers - Abstract
Acute pancreatitis is a frequent pathology with 11,000 to 13,000 new cases per year in France. A biliary origin (30 to 70% of the cases) should be suspected when alanine amino-transferases are elevated during the first 48 hours, and it is confirmed by the presence of gallstones at trans abdominal ultrasound. Abdominal computed-tomography scan is performed around the fifth day, and is repeated according to clinical and biological evolution. Management of acute biliary pancreatitis varies according to its severity, which should be assessed according to systemic inflammatory response syndrome and organ failures. For mild acute pancreatitis, cholecystectomy should be performed during in-hospital stay, before oral feeding. For moderately severe and severe acute pancreatitis, treatment is based on resuscitation, early enteral continuous feeding, and management of complications. Interval cholecystectomy is performed at a later stage. Endoscopic retrograde cholangiopancreatography with sphincterotomy should be performed in emergency when angiocholitis is associated, and in delayed emergency before oral feeding for persistent common bile duct stone. A common bile duct stone should be searched for during cholecystectomy and can be treated during the same surgical procedure if local conditions are adequate. Cholelithiasis is the most frequent cause of acute pancreatitis during pregnancy, and its diagnosis and the treatment have some particularities.
- Published
- 2019
- Full Text
- View/download PDF
195. Prise en charge de la pancréatite aigüe lithiasique
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F. Marques, A.-G. Le Bayon-Bréard, B. Godart, Louise Barbier, Ephrem Salamé, and M. Bougard
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03 medical and health sciences ,0302 clinical medicine ,030211 gastroenterology & hepatology ,Surgery ,030230 surgery - Abstract
Resume La pancreatite aigue est une pathologie frequente avec 11 000 a 13 000 cas par an en France. Dans 30 a 70 % des cas, elle est d’origine lithiasique. Une elevation des alanine amino-transferases (ALAT) dans les 48 premieres heures doit faire suspecter une etiologie biliaire. Le diagnostic etiologique est confirme par la presence de calculs vesiculaires a l’echographie. Le scanner abdominopelvien est realise vers le cinquieme jour, puis repete en fonction de l’evolution clinique et biologique. La prise en charge differe selon la gravite de la pancreatite aigue, qui est evaluee par le score du syndrome de reponse inflammatoire systemique et par la presence de defaillances d’organes. Pour les formes benignes, la cholecystectomie est faite pendant la meme hospitalisation avant la realimentation. Pour les formes severes, le traitement repose essentiellement sur la reanimation, la mise en route d’une alimentation enterale continue precoce et la prise en charge des complications. La cholecystectomie est realisee a distance. La cholangio-pancreatographie avec sphincterotomie endoscopique est indiquee en urgence en cas d’angiocholite, et en semi-urgence en cas de calcul persistant de la voie biliaire principale avant la realimentation orale. Un calcul de la voie biliaire principale doit egalement etre recherche lors de la cholecystectomie et peut etre traite dans le meme temps chirurgical si les conditions sont favorables. La lithiase biliaire est la plus frequente cause de PA pendant la grossesse, dont le traitement et le diagnostic ont des particularites.
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- 2019
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196. Diagnostic et prise en charge atypique d’une tumeur pancréatique : quand l’anatomie nous joue des tours
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Louise Barbier, Fabien Fredon, A.-G. Le Bayon, F. Marques, and Ephrem Salamé
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Surgery - Published
- 2019
- Full Text
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197. Surface charge tunable catanionic vesicles based on serine-derived surfactants as efficient nanocarriers for the delivery of the anticancer drug doxorubicin
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Eduardo F. Marques, Raquel C. F. Gonçalves Lopes, M. Luísa C. Vale, Ana Rita Faria, Jana B. Nieder, and Oscar F. Silvestre
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Cell Survival ,Surface Properties ,Antineoplastic Agents ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Flow cytometry ,Surface-Active Agents ,Pulmonary surfactant ,Cations ,Serine ,medicine ,Humans ,General Materials Science ,Doxorubicin ,Surface charge ,A549 cell ,Drug Carriers ,Microscopy, Confocal ,medicine.diagnostic_test ,Chemistry ,Vesicle ,Cationic polymerization ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,A549 Cells ,Biophysics ,Nanocarriers ,0210 nano-technology ,medicine.drug - Abstract
Self-assembled vesicles composed of amino acid-based cationic/anionic surfactant mixtures show promise as novel effective drug nanocarriers. Here, we report the in vitro performance of vesicles based on cationic (16Ser) and anionic (8-8Ser) serine-based surfactants using a cancer cell model for the delivery of the anticancer drug doxorubicin (DOX). This catanionic mixture yields both negatively (0.20 in the cationic surfactant molar fraction, x16Ser) and positively (x16Ser = 0.58) charged vesicles, hence providing a surface charge tunable system. Low toxicity is confirmed for concentration ranges below 32 μM in both formulations. DOX is successfully encapsulated in the vesicles, resulting in a surface charge switch to negative for the (0.58) system, making both (0.20) and (0.58) DOX-loaded vesicles highly interesting for systemic administration. High uptake by cells was demonstrated using flow cytometry and confocal microscopy. Drug accumulation results in an increase of cell uptake up to 250% and 200% for the (0.20) and (0.58) vesicles, respectively, compared to free DOX and with localizations near the nuclear regions in the cells. The in vitro cytotoxicity studies show that DOX-loaded vesicles induce cell death, confirming the therapeutic potential of the formulations. Furthermore, the efficient accumulation of the drug inside the cell compartments harbors the potential for optimization strategies including phased delivery for prolonged treatment periods or even on-demand release.
- Published
- 2019
- Full Text
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198. Fast Bragg Grating Inscription in PMMA Polymer Optical Fibres: Impact of Thermal Pre-Treatment of Preforms
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Carlos A. F. Marques, Andreas Pospori, Gökhan Demirci, Onur Çetinkaya, Barbara Gawdzik, Paulo Antunes, Ole Bang, Pawel Mergo, Paulo André, and David J. Webb
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polymer optical fiber ,annealing process ,Bragg gratings ,preform treatment ,POF sensors ,Chemical technology ,TP1-1185 - Abstract
In this work, fibre Bragg gratings (FBGs) were inscribed in two different undoped poly- (methyl methacrylate) (PMMA) polymer optical fibres (POFs) using different types of UV lasers and their inscription times, temperature and strain sensitivities are investigated. The POF Bragg gratings (POFBGs) were inscribed using two UV lasers: a continuous UV HeCd @325 nm laser and a pulsed UV KrF @248 nm laser. Two PMMA POFs are used in which the primary and secondary preforms (during the two-step drawing process) have a different thermal treatment. The PMMA POFs drawn in which the primary or secondary preform is not specifically pre-treated need longer inscription time than the fibres drawn where both preforms have been pre-annealed at 80 °C for 2 weeks. Using both UV lasers, for the latter fibre much less inscription time is needed compared to another homemade POF. The properties of a POF fabricated with both preforms thermally well annealed are different from those in which just one preform step process is thermally treated, with the first POFs being much less sensitive to thermal treatment. The influence of annealing on the strain and temperature sensitivities of the fibres prior to FBG inscription is also discussed, where it is observed that the fibre produced from a two-step drawing process with well-defined pre-annealing of both preforms did not produce any significant difference in sensitivity. The results indicate the impact of preform thermal pre-treatment before the PMMA POFs drawing, which can be an essential characteristic in the view of developing POF sensors technology.
- Published
- 2017
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199. Amino-Functionalized Titanate Nanotubes: pH and Kinetic Study of a Promising Adsorbent for Acid Dye in Aqueous Solution
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Débora A. Sales, Paloma N. S. Lima, Lucinaldo S. Silva, Thalles M. F. Marques, Suziete B. S. Gusmão, Odair P. Ferreira, Anupama Ghosh, Yuset Guerra, Alan Í. S. Morais, Roosevelt D. S. Bezerra, Edson C. Silva-Filho, and Bartolomeu C. Viana
- Subjects
General Materials Science ,titanate nanotubes ,aminosilane ,adsorption ,remazol blue R - Abstract
This work reports the functionalization of sodium titanate nanotubes with amine groups obtained from the reaction of titanate nanotubes with [3-(2-Aminoethylamino)propyl]trimethoxysilane, NaTiNT−2NH, and 3-[2-(2-Aminoethylamino)ethylamino]propyltrimethoxysilane, NaTiNT−3NH. It was verified that the crystalline and morphological structures of NaTiNT were preserved after the functionalization, spectroscopies showed that aminosilane interacted covalently with the surface of NaTiNT, and the incorporation of the aminosilane groups on the surface of NaTiNT can be confirmed. The adsorbent matrices NaTiNT−2NH and NaTiNT−3NH were used to remove the anionic dye from remazol blue R (RB) in aqueous medium, and the highest adsorption capacity was around 365.84 mg g−1 (NaTiNT−2NH) and 440.70 mg g−1 (NaTiNT−3NH) in the range of pH 5.0 to 10.0 and the equilibrium time was reached in 210 min (NaTiNT−2NH) and 270 min (NaTiNT−3NH). Furthermore, the Elovich model, which reports the adsorption in heterogeneous sites and with different activation energies in the chemisorption process, was the most appropriate to describe the adsorption kinetics. Thus, these adsorbent matrices can be used as an alternative potential for dye removal RB in aqueous solution.
- Published
- 2022
- Full Text
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200. New technique to demonstrate corneal magnification using trypan blue in cataract surgery
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Frederico F. Marques, Daniela M.V. Marques, and Robert H. Osher
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Capsulorrexis ,Facoemulsificação ,Magnificação corneana ,Ophthalmology ,RE1-994 - Abstract
PURPOSE: To demonstrate the corneal magnification using trypan blue in cataract surgery. METHODS: Eight eyes of eight patients undergoing phacoemulsification with an intraocular lens implantation were enrolled in this study. After staining the anterior capsule with Trypan Blue 0.1% and performing the capsulorhexis, the excised anterior capsule was placed on the corneal surface. By observing and measuring the relationship between the border of the excised anterior capsule and the intracameral capsulorhexis opening, the effect of corneal magnification was clearly demonstrated and calculated by linear method. RESULTS: The average magnification of the cornea was 20.88% using linear method with an average area magnification of 47.53%. CONCLUSION: The capsulorhexis stained by trypan blue is useful to demonstrate the magnification provided by the cornea helping to design an intended opening size.
- Published
- 2011
- Full Text
- View/download PDF
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