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611 results on '"Silva, Luís P."'

602. Easy and efficient processes for catalyst recycling and product recovery in organic biphase systems tested in the hydrogenation of hex-1-ene

Author

Rosa, Ricardo G. da, Martinelli, Laura, Silva, Luís H. M. da, and Loh, Watson

Abstract

Two organic liquid biphase systems containg poly(ethylene oxide), heptane and either CH2Cl2 or methanol have been tested in the catalytic hydrogenation of hex-1-ene using, respectively, Wilkinson’s catalyst and a cationic rhodium complex, both leading to high yields and selectivity, with the latter showing a better performance and enabling easy and efficient product separation and catalyst recycling.

Published
2000

604. Trepopnea may explain right-sided pleural effusion in patients with decompensated heart failure.

Author

de Araujo, Bruno Schneider, Reichert, Roberta, Eifer, Diego André, Soder, Stephan A., dos Santos, Manoel B. Schmiedel, Clausell, Nadine, and Beck-da-Silva, Luís

Abstract

Abstract: Background: Physicians often overlook trepopnea as a symptom, and its prevalence and clinical repercussions are not usually described. We propose that trepopnea is a common symptom in heart failure (HF) and, because of patient avoidance of left lateral decubitus position, contributes to the greater prevalence of right-sided pleural effusion in patients with HF. Accordingly, this study aimed to determine trepopnea prevalence and to evaluate the association of trepopnea and the laterality of pleural effusion in decompensated HF. Methods: Consecutive patients (n = 37) with decompensated HF and evidence of pleural effusion by chest x-ray were included. Data were collected at the emergency department by a standard clinical examination in which patients were specifically asked about the presence of trepopnea and preferred decubitus position while recumbent. Chest x-ray and echocardiographic parameters were recorded. Results: Of the 37 patients, 19 (51%) reported trepopnea. Most patients presented with right-sided pleural effusion; only 2 patients (5.4%) presented with left-sided pleural effusion. Patients who reported trepopnea had predominant right-sided pleural effusion more frequently than patients without this symptom (73.7% vs 26.3%; P = .049). The participants that reported trepopnea or avoidance of left lateral decubitus position while recumbent or both had a greater probability of having predominant right-sided pleural effusion (likelihood ratio, 1.85; 95% confidence interval, 1.02-3.35). Conclusions: Trepopnea is a common symptom in patients with decompensated HF and is associated with predominant right-sided pleural effusion in this population. Our results indicate that trepopnea may be a contributory factor for pleural effusion laterality in patients with decompensated HF. [Copyright &y& Elsevier]

Published
2012
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605. Role of probucol in inhibiting intimal hyperplasia after coronary stent implantation: A randomized study.

Author

Nunes, Gilberto L., Abizaid, Alexandre C., Theodoro, Marcus P., Brito, Fábio S., Caixeta, Adriano, da Silva, Luís Felipe F., Mazzotti, Nicolle G., Belló-Klein, Adriane, and Clausell, Nadine

Subjects
ANTICHOLESTEREMIC agents, PROBUCOL, CELLULAR pathology, HYPERPLASIA
Abstract

Background: Oxygen-free radicals can stimulate smooth muscle cell proliferation and may therefore be involved in the genesis of in-stent restenosis. Thus, treatment with probucol, a potent antioxidant agent that has been shown to reduce restenosis after balloon angioplasty, may be an effective strategy to prevent intimal hyperplasia after stenting. Methods: In a prospective double-blind study, 59 patients submitted to coronary stent implantation were randomly assigned to treatment with either probucol (1 g/d) or placebo, starting two weeks before the procedure and continued for 6 months. The primary end point was the intimal hyperplasia volume at 6 months measured by intravascular ultrasound (IVUS)imaging. Results: Of the 59 randomized patients, 54 underwent successful stent implantation, completed the follow-up period, and underwent repeat angiography, 6.1 ± 1.1 months after the procedure. Volumetric IVUS analysis revealed similar intimal hyperplasia volumes (403 ± 26.7 mm3 for probucol vs 44.8 ± 28.3 mm3 for placebo) and percent volume obstruction of the lumen (30.4% ± 14.5% for probucol versus 30.7% ± 17.2% for placebo) in both groups. In addition, quantitative coronary angiography showed no differences in late loss (1.0 ± 0.8 mm vs 1.1 ± 0.8 mm), loss index (0.5 ± 0.4 for both groups), or angiographic restenosis rates (19.4% vs 18.5%) between the probucol and placebo groups, despite the observation of significant changes in the lipid profile and in the plasma antioxidant defenses in patients receiving probucol. Conclusions: Treatment with the antioxidant probucol failed to reduce neointimal formation after coronary stent implantation as assessed by IVUS volumetric analysis. [Copyright &y& Elsevier]

Published
2006
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606. Two Portuguese Cochlear Implanted Dizygotic Twins: A Case Report

Author

Rita Chora, Joana, Simões-Teixeira, Helena, Daniel Matos, Tiago, Humberto Martins, Jorge, Alves, Marisa, Ferreira, Raquel, Silva, Luís, Ribeiro, Carlos, Fialho, Graça, and Caria, Helena

Abstract

Individual’s hearing performance after cochlear implant (CI) is variable and depends on different factors such as etiology of deafness, age at implantation, and social/family hearing environment. Here we report the case of dizygotic twins, boy and girl, presenting with neurosensorial profound deafness prior CI (age of implantation = 3.5 years old). Both parents have severe/profound deafness, since childhood, and use sign language as primary mode of communication. Clinical and genetic characterization was performed, as well as the assessment of the auditory and oral (re)habilitation after CI, applying a battery of audiological, speech, and language tests. The twin girl and the father were homozygous for the c.35delG mutation in the GJB2 gene, while the twin boy and the mother were compound heterozygotes, both monoallelic for c.35delG and for the deletion del(GJB6-D13S1830) in the GJB6 gene. The remaining hearing impaired relatives were c.35delG homozygotes. The genetic cause of deafness was thus identified in this family. Some noteworthy differences were observed regarding twins’ auditory and oral performance after CI. Subsequent follow-up of these children allowed us to conclude that those differences were most likely due to the different environment in which the twins have been living than to their different GJB2/GJB6 genotypes.

Published
2012
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607. Cover Picture: 3D–2D–0D Stepwise Deconstruction of a Water Framework Templated by a Nanoporous Organic–Inorganic Hybrid Host (Chem. Eur. J. 26/2010)

Author

Rocha, João, Shi, Fa‐Nian, Paz, Filipe A. Almeida, Mafra, Luís, Sardo, Mariana, Cunha‐Silva, Luís, Chisholm, James, Ribeiro‐Claro, Paulo, and Trindade, Tito

Abstract

Unprecedented3D interpenetrated networks of hydrogen‐bonded water molecules and a hybrid matrix have been found in a novel supramolecular salt, [H2pip]3[Ge(hedp)2]⋅14 H2O (H2pip2+=C4H12N22+; hedp5−=C2H3P2O75−). In their Full Paper on page 7741 ff.,J. Rocha et al. demonstrate that this “ice framework” is stable at ambient temperature for long periods of time. The heating of this salt leads to a sequential framework deconstruction process, which occurs in a stepwise fashion from a 3D network into layers (2D) and, ultimately, discrete water aggregates (0D).

Published
2010
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608. Computation of the topological entropy in chaotic biophysical bursting models for excitable cells

Author

Duarte, Jorge, Silva, Luís, and Sousa Ramos, J.

Abstract

One of the interesting complex behaviors in many cell membranes is bursting, in which a rapid oscillatory state alternates with phases of relative quiescence. Although there is an elegant interpretation of many experimental results in terms of nonlinear dynamical systems, the dynamics of bursting models is not completely described. In the present paper, we study the dynamical behavior of two specific three-variable models from the literature that replicate chaotic bursting. With results from symbolic dynamics, we characterize the topological entropy of one-dimensional maps that describe the salient dynamics on the attractors. The analysis of the variation of this important numerical invariant with the parameters of the systems allows us to quantify the complexity of the phenomenon and to distinguish different chaotic scenarios. This work provides an example of how our understanding of physiological models can be enhanced by the theory of dynamical systems.

Published
2006
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609. MAMMALS IN PORTUGAL: A data set of terrestrial, volant, and marine mammal occurrences in Portugal

Author

Clara Grilo, Beatriz C. Afonso, Filipe Afonso, Marta Alexandre, Sara Aliácar, Ana Almeida, Ivan Prego Alonso, Francisco Álvares, Paulo Alves, Paulo Célio Alves, Pedro Alves, Anabela Amado, Vitor Amendoeira, Francisco Amorim, Guilherme Silva Aparício, Ricardo Araújo, Fernando Ascensão, Margarida Augusto, Victor Bandeira, A. Márcia Barbosa, Soraia Barbosa, Sérgio Barbosa, Silvia Barreiro, Paulo Barros, Tânia Barros, Filomena Barros, Mafalda Basto, Joana Bernardino, Sara Bicho, Luis Eduardo Biedma, Marta Borges, Luis Braz, José Carlos Brito, Tiago Brito, João Alexandre Cabral, Javier Calzada, Cláudia Camarinha, Mafalda Carapuço, Paulo Cardoso, Mário Carmo, Carlos Carrapato, Maílis Silva Carrilho, Diogo Filipe T. C. S. Carvalho, Filipe Carvalho, João Carvalho, Diana Castro, Guilherme Castro, Joana Castro, Luis Roma Castro, Filipe Xavier Catry, Ana M. Cerveira, André Cid, Rafael Clarke, Conceição Conde, José Conde, Jorge Costa, Mafalda Costa, Pedro Costa, Cristina Costa, André Pedro Couto, João Craveiro, Marta Dias, Sofia Dias, Beatriz Duarte, Virginia Duro, Cláudia Encarnação, Sofia Eufrázio, António Fael, João Salvador Falé, Sandra Faria, Carlos Fernandes, Margarida Fernandes, Gonçalo Ferrão Costa, Clara Ferreira, Diogo F. Ferreira, Eduardo Ferreira, Joaquim Pedro Ferreira, João Ferreira, Diana Ferreira, Carlos Fonseca, Inês Fontes, Ricardo Fragoso, Claudia Franco, Tamira Freitas, Sofia I. Gabriel, Rory Gibb, Patricia Gil, Carla Patricia Jorge Gomes, Pedro Horta, Pedro Gomes, Verónica Gomes, Filipa Grilo, Américo Guedes, Filipa Guilherme, Iván Gutiérrez, Henry Harper, José M. Herrera, Dário Hipólito, Samuel Infante, José Jesus, Kate E. Jones, Marina I. Laborde, Luís Lamas Oliveira, Inês Leitão, Rita Lemos, Cátia Lima, Paloma Linck, Hugo Lopes, Susana Lopes, Adrià López‐Baucells, Armando Loureiro, Filipa Loureiro, Rui Lourenço, Sofia Lourenço, Paula Lucas, Ana Magalhães, Cristina Maldonado, Fabio Marcolin, Sara Marques, J. Tiago Marques, Carina Marques, Paulo Marques, Pedro Caetano Marrecas, Frederico Martins, Raquel Martins, Miguel Mascarenhas, Vanessa A. Mata, Ana Rita Mateus, Milene Matos, Denis Medinas, Tiago Mendes, Gabriel Mendes, Frederico Mestre, Catarina Milhinhas, António Mira, Rita I. Monarca, Norberto Monteiro, Barbara Monteiro, Pedro Monterroso, Mónia Nakamura, Nuno Negrões, Eva K. Nóbrega, Miguel Nóvoa, Manuel Nunes, Nuno Jardim Nunes, Flávio Oliveira, José Miguel Oliveira, Jorge M. Palmeirim, João Pargana, Anabela Paula, Joana Paupério, Nuno M. Pedroso, Guilherme Pereira, Pedro F. Pereira, José Pereira, Maria João Ramos Pereira, Francisco Petrucci‐Fonseca, Miguel Pimenta, Sara Pinto, Nuno Pinto, Rosa Pires, Ricardo Pita, Carlos Pontes, Marisa Quaresma, João Queirós, Luís Queirós, Ana Rainho, Maria Graça Ramalhinho, Patrícia Ramalho, Helena Raposeira, Francisco Rasteiro, Hugo Rebelo, Frederico Tátá Regala, Dyana Reto, Sérgio Bruno Ribeiro, Helena Rio‐Maior, Ricardo Rocha, Rita Gomes Rocha, Luísa Rodrigues, Jacinto Román, Sara Roque, Luís Miguel Rosalino, Inês T. Rosário, Mariana Rossa, Danilo Russo, Pedro Sá, Helena Sabino‐Marques, Vânia Salgueiro, Helena Santos, Joana Santos, João P. V. Santos, Nuno Santos, Sara Santos, Carlos Pedro Santos, Margarida Santos‐Reis, Ana Serronha, Pablo Sierra, Bruno Silva, Carla S. G. M. Silva, Clara Silva, Diogo Silva, Luís P. Silva, Ricardo Silva, Carmen Silva, Flavio Manoel Rodrigues Silva Júnior, Pedro Sousa, Diana Sousa‐Guedes, Giulia Spadoni, Joaquim T. Tapisso, Daniela Teixeira, Sérgio Teixeira, Nuno Teixeira, Rita T. Torres, Paulo Travassos, Hélia Vale‐Gonçalves, Nuno Cidraes‐Vieira, Sophie Merten, Maria Luz Mathias, Grilo, Clara, Afonso, Beatriz C, Afonso, Filipe, Alexandre, Marta, Aliácar, Sara, Almeida, Ana, Alonso, Ivan Prego, Álvares, Francisco, Alves, Paulo, Alves, Paulo Célio, Alves, Pedro, Amado, Anabela, Amendoeira, Vitor, Amorim, Francisco, da Silva Aparício, Guilherme, Araújo, Ricardo, Ascensão, Fernando, Augusto, Margarida, Bandeira, Victor, Barbosa, A Márcia, Barbosa, Soraia, Barbosa, Sérgio, Barreiro, Silvia, Barros, Paulo, Barros, Tânia, Barros, Filomena, Basto, Mafalda, Bernardino, Joana, Bicho, Sara, Biedma, Luis Eduardo, Borges, Marta, Braz, Lui, Brito, José Carlo, Brito, Tiago, Cabral, João Alexandre, Calzada, Javier, Camarinha, Cláudia, Carapuço, Mafalda, Cardoso, Paulo, Carmo, Mário, Carrapato, Carlo, da Silva Carrilho, Maíli, Carvalho, Diogo Filipe T C S, Carvalho, Filipe, Carvalho, João, Castro, Diana, Castro, Guilherme, Castro, Joana, Castro, Luis Roma, Catry, Filipe Xavier, Cerveira, Ana M, Cid, André, Clarke, Rafael, Conde, Conceição, Conde, José, Costa, Jorge, Costa, Mafalda, Costa, Pedro, Costa, Cristina, do Couto, André Pedro, Craveiro, João, Dias, Marta, Dias, Sofia, Duarte, Beatriz, Duro, Virginia, Encarnação, Cláudia, Eufrázio, Sofia, Fael, António, Falé, João Salvador, Faria, Sandra, Fernandes, Carlo, Fernandes, Margarida, da Costa, Gonçalo Ferrão, Ferreira, Clara, Ferreira, Diogo F, Ferreira, Eduardo, Ferreira, Joaquim Pedro, Ferreira, João, Ferreira, Diana, Fonseca, Carlo, Fontes, Inê, Fragoso, Ricardo, Franco, Claudia, Freitas, Tamira, Gabriel, Sofia I, Gibb, Rory, Gil, Patricia, Gomes, Carla Patricia Jorge, Horta, Pedro, Gomes, Pedro, Gomes, Verónica, Grilo, Filipa, Guedes, Américo, Guilherme, Filipa, Gutiérrez, Iván, Harper, Henry, Herrera, José M, Hipólito, Dário, Infante, Samuel, Jesus, José, Jones, Kate E, Laborde, Marina I, de Oliveira, Luís Lama, Leitão, Inê, Lemos, Rita, Lima, Cátia, Linck, Paloma, Lopes, Hugo, Lopes, Susana, López-Baucells, Adrià, Loureiro, Armando, Loureiro, Filipa, Lourenço, Rui, Lourenço, Sofia, Lucas, Paula, Magalhães, Ana, Maldonado, Cristina, Marcolin, Fabio, Marques, Sara, Marques, J Tiago, Marques, Carina, Marques, Paulo, Marrecas, Pedro Caetano, Martins, Frederico, Martins, Raquel, Mascarenhas, Miguel, Mata, Vanessa A, Mateus, Ana Rita, Matos, Milene, Medinas, Deni, Mendes, Tiago, Mendes, Gabriel, Mestre, Frederico, Milhinhas, Catarina, Mira, António, Monarca, Rita I, Monteiro, Norberto, Monteiro, Barbara, Monterroso, Pedro, Nakamura, Mónia, Negrões, Nuno, Nóbrega, Eva K, Nóvoa, Miguel, Nunes, Manuel, Nunes, Nuno Jardim, Oliveira, Flávio, Oliveira, José Miguel, Palmeirim, Jorge M, Pargana, João, Paula, Anabela, Paupério, Joana, Pedroso, Nuno M, Pereira, Guilherme, Pereira, Pedro F, Pereira, José, Pereira, Maria João Ramo, Petrucci-Fonseca, Francisco, Pimenta, Miguel, Pinto, Sara, Pinto, Nuno, Pires, Rosa, Pita, Ricardo, Pontes, Carlo, Quaresma, Marisa, Queirós, João, Queirós, Luí, Rainho, Ana, da Graça Ramalhinho, Maria, Ramalho, Patrícia, Raposeira, Helena, Rasteiro, Francisco, Rebelo, Hugo, Regala, Frederico Tátá, Reto, Dyana, Ribeiro, Sérgio Bruno, Rio-Maior, Helena, Rocha, Ricardo, Rocha, Rita Gome, Rodrigues, Luísa, Román, Jacinto, Roque, Sara, Rosalino, Luís Miguel, do Rosário, Inês T, Rossa, Mariana, Russo, Danilo, Sá, Pedro, Sabino-Marques, Helena, Salgueiro, Vânia, Santos, Helena, Santos, Joana, Santos, João P V, Santos, Nuno, Santos, Sara, Santos, Carlos Pedro, Santos-Reis, Margarida, Serronha, Ana, Sierra, Pablo, Silva, Bruno, Silva, Carla S G M, Silva, Clara, Silva, Diogo, da Silva, Luís P, Silva, Ricardo, Silva, Carmen, da Silva Júnior, Flavio Manoel Rodrigue, Sousa, Pedro, Sousa-Guedes, Diana, Spadoni, Giulia, Tapisso, Joaquim T, Teixeira, Daniela, Teixeira, Sérgio, Teixeira, Nuno, Torres, Rita T, Travassos, Paulo, Vale-Gonçalves, Hélia, Cidraes-Vieira, Nuno, von Merten, Sophie, and da Luz Mathias, Maria

Subjects
1873-2021, Mammals, EuropeIberian Peninsula, Portugal, Animal, Climate Change, Carnivora, Eulipotyphla, Rodentia, Rabbit, Lagomorpha, Mammal, Europe, Rodentiaspecies distribution, Chiroptera, Animals, species distribution, Rabbits, Cetartiodactyla, Ecology, Evolution, Behavior and Systematics, Ecosystem, Iberian Peninsula
Abstract

Mammals are threatened worldwide, with ~26% of all species being included in the IUCN threatened categories. This overall pattern is primarily associated with habitat loss or degradation, and human persecution for terrestrial mammals, and pollution, open net fishing, climate change, and prey depletion for marine mammals. Mammals play a key role in maintaining ecosystems functionality and resilience, and therefore information on their distribution is crucial to delineate and support conservation actions. MAMMALS IN PORTUGAL is a publicly available data set compiling unpublished georeferenced occurrence records of 92 terrestrial, volant, and marine mammals in mainland Portugal and archipelagos of the Azores and Madeira that includes 105,026 data entries between 1873 and 2021 (72% of the data occurring in 2000 and 2021). The methods used to collect the data were: live observations/captures (43%), sign surveys (35%), camera trapping (16%), bioacoustics surveys (4%) and radiotracking, and inquiries that represent less than 1% of the records. The data set includes 13 types of records: (1) burrows | soil mounds | tunnel, (2) capture, (3) colony, (4) dead animal | hair | skulls | jaws, (5) genetic confirmation, (6) inquiries, (7) observation of live animal (8), observation in shelters, (9) photo trapping | video, (10) predators diet | pellets | pine cones/nuts, (11) scat | track | ditch, (12) telemetry and (13) vocalization | echolocation. The spatial uncertainty of most records ranges between 0 and 100 m (76%). Rodentia (n=31,573) has the highest number of records followed by Chiroptera (n=18,857), Carnivora (n=18,594), Lagomorpha (n=17,496), Cetartiodactyla (n=11,568) and Eulipotyphla (n=7008). The data set includes records of species classified by the IUCN as threatened (e.g., Oryctolagus cuniculus [n=12,159], Monachus monachus [n=1,512], and Lynx pardinus [n=197]). We believe that this data set may stimulate the publication of other European countries data sets that would certainly contribute to ecology and conservation-related research, and therefore assisting on the development of more accurate and tailored conservation management strategies for each species. There are no copyright restrictions; please cite this data paper when the data are used in publications.

Published
2021

610. Building a Portuguese coalition for biodiversity genomics.

Author

Marques JP, Alves PC, Amorim IR, Lopes RJ, Moura M, Myers E, Sim-Sim M, Sousa-Santos C, Alves MJ, Borges PAV, Brown T, Carneiro M, Carrapato C, Ceríaco LMP, Ciofi C, da Silva LP, Diedericks G, Diroma MA, Farelo L, Formenti G, Gil F, Grilo M, Iannucci A, Leitão HG, Máguas C, Mc Cartney AM, Mendes SL, Moreno JM, Morselli M, Mouton A, Natali C, Pereira F, Rego RMC, Resendes R, Roxo G, Svardal H, Trindade H, Vicente S, Winkler S, Alvarenga M, Amaral AJ, Antunes A, Campos PF, Canário AVM, Castilho R, Castro LFC, Crottini A, Cunha MV, Espregueira Themudo G, Esteves PJ, Faria R, Rodríguez Fernandes C, Ledoux JB, Louro B, Magalhaes S, Paulo OS, Pearson G, Pimenta J, Pina-Martins F, Santos TL, Serrão E, Melo-Ferreira J, and Sousa VC

Published
2024
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611. High-resolution multi-marker DNA metabarcoding reveals sexual dietary differentiation in a bird with minor dimorphism.

Author

da Silva LP, Mata VA, Lopes PB, Lopes RJ, and Beja P

Abstract

Although sexual dietary differentiation is well known in birds, it is usually linked with significant morphological dimorphism between males and females, with lower differentiation reported in sexually monomorphic or only slightly dimorphic species. However, this may be an artifact of poor taxonomic resolution achieved in most conventional dietary studies, which may be unable to detect subtle intraspecific differentiation in prey consumption. Here, we show the power of multi-marker metabarcoding to address these issues, focusing on a slightly dimorphic generalist passerine, the black wheatear Oenanthe leucura . Using markers from four genomic regions (18S, 16S, COI, and trn L), we analyzed fecal droppings collected from 93 adult black wheatears during the breeding season. We found that sexes were rather similar in bill and body features, though males had a slightly thicker bill and longer wings and tail than females. Diet was dominated in both sexes by a very wide range of arthropod species and a few fleshy fruits, but the overall diet diversity was higher for males than females, and there was a much higher frequency of occurrence of ants in female (58%) than male (29%) diets. We hypothesize that the observed sexual differentiation was likely related to females foraging closer to their offspring on abundant prey, while males consumed a wider variety of prey while foraging more widely. Overall, our results suggest that dietary sexual differentiation in birds may be more widespread than recognized at present and that multi-marker DNA metabarcoding is a particularly powerful tool to unveiling such differences., Competing Interests: The authors have no conflict of interest to declare., (© 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)

Published
2020
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