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2,305 results on '"Leal M."'

154. Risk stratification for small for gestational age for the Brazilian population: a secondary analysis of the Birth in Brazil study.

Author

Souza, RT, Vieira, MC, Esteves-Pereira, AP, Domingues, RMSM, Moreira, MEL, da Cunha Filho, EV, Sandall, J, Cecatti, JG, do Carmo Leal, M, Dias, MAB, Pasupathy, D, Souza, RT, Vieira, MC, Esteves-Pereira, AP, Domingues, RMSM, Moreira, MEL, da Cunha Filho, EV, Sandall, J, Cecatti, JG, do Carmo Leal, M, Dias, MAB, and Pasupathy, D

Abstract

Risk-stratification screening for SGA has been proposed in high-income countries to prevent perinatal morbidity and mortality. There is paucity of data from middle-income settings. The aim of this study is to explore risk factors for SGA in Brazil and assess potential for risk stratification. This population-based study is a secondary analysis of Birth in Brazil study, conducted in 266 maternity units between 2011 and 2012. Univariate and multivariate logistic regressions were performed, and population attributable fraction estimated for early and all pregnancy factors. We calculated absolute risk, odds ratio, and population prevalence of single or combined factors stratified by parity. Factors associated with SGA were maternal lupus (ORadj 4.36, 95% CI [2.32-8.18]), hypertensive disorders in pregnancy (ORadj 2.72, 95% CI [2.28-3.24]), weight gain < 5 kg (ORadj 2.37, 95% CI [1.99-2.83]), smoking at late pregnancy (ORadj 2.04, 95% CI [1.60-2.59]), previous low birthweight (ORadj 2.22, 95% CI [1.79-2.75]), nulliparity (ORadj 1.81, 95% CI [1.60-2.05]), underweight (ORadj 1.61, 95% CI [1.36-1.92]) and socioeconomic status (SES) < 5th centile (ORadj 1.23, 95% CI [1.05-1.45]). Having two or more risk factors (prevalence of 4.4% and 8.0%) was associated with a 2 and fourfold increase in the risk for SGA in nulliparous and multiparous, respectively. Early and all pregnancy risk factors allow development of risk-stratification for SGA. Implementation of risk stratification coupled with specific strategies for reduction of risk and increased surveillance has the potential to contribute to the reduction of stillbirth in Brazil through increased detection of SGA, appropriate management and timely delivery.

Published
2020

155. High Strain Rate Superplasticity of WE54 Mg Alloy after Severe Friction Stir Processing

Author

Ministerio de Economía y Competitividad (España), Álvarez-Leal, M., Carreño, Fernando, Orozco-Caballero, A., Rey, P., Ruano, Oscar Antonio, Ministerio de Economía y Competitividad (España), Álvarez-Leal, M., Carreño, Fernando, Orozco-Caballero, A., Rey, P., and Ruano, Oscar Antonio

Abstract

Friction stir processing (FSP) was used on coarse-grained WE54 magnesium alloy plates of as-received material. These were subjected to FSP under two different cooling conditions, refrigerated and non-refrigerated, and different severe processing conditions characterized by low rotation rate and high traverse speed. After FSP, ultrafine equiaxed grains and refinement of the coarse precipitates were observed. The processed materials exhibited high resistance at room temperature and excellent superplasticity at the high strain rate of 10−2 s−1 and temperatures between 300 and 400 °C. Maximum tensile superplastic elongation of 726% was achieved at 400 °C. Beyond 400 °C, a noticeable loss of superplastic response occurred due to a loss of thermal stability of the grain size. Grain boundary sliding is the operative deformation mechanism that can explain the high-temperature flow behavior of the ultrafine grained FSP-WE54 alloy, showing increasing superplasticity with increasing processing severity.

Published
2020

156. Large elongations in WE54 magnesium alloy by solute-drag creep controlling the deformation behavior

Author

Ministerio de Economía y Competitividad (España), Ruano, Oscar Antonio, Álvarez-Leal, M., Orozco-Caballero, A., Carreño, Fernando, Ministerio de Economía y Competitividad (España), Ruano, Oscar Antonio, Álvarez-Leal, M., Orozco-Caballero, A., and Carreño, Fernando

Abstract

Solute-drag creep is a diffusion-controlled process that may govern deformation in coarse-grained materials with solute atoms in solution. Elongation-to-failure tensile tests were conducted in a WE54 alloy containing solutes of Y and Nd in the range 25–450 °C. Elongations of more than 150% were observed at high temperatures and a maximum elongation to failure of 312% was determined at 450 °C and 10-2 s-1. Microstructural observations show elongated grains and the presence of dislocation bands after deformation under these conditions. Strain-rate-change tests reveal a range at high temperatures showing low stress exponents. Since grain boundary sliding was discarded as a possible controlling mechanism, the observed low stress exponents, high elongations and elongated grains are attributed to solute-drag creep as the principal deformation mechanism.

Published
2020

157. Imágenes en divertículos del tubo digestivo: Localizaciones infrecuentes. Serie de casos

Author

Daniel Hasson A, Ema Leal M, Claudio Cortés A, Giancarlo Schiappacasse F, Ignacio Maldonado S, Gerhard Franz G., and Carolina Whittle P

Subjects
diverticulitis, divertículo esofágico, divertículo gastrointestinal, imágenes digestivas, Radiology, Nuclear Medicine and imaging, Divertículo digestivo
Abstract

Resumen: Los divertículos se pueden localizar en todo el tubo digestivo (TD): esófago, estómago, duodeno, yeyuno, íleon, apéndice, colon. Son infrecuentes, salvo en colon. Sus manifestaciones clínicas son inespecíficas, con difícil diagnóstico y mayor riesgo de complicaciones. Se presenta una serie de divertículos digestivos atípicos, mostrando las características imagenológicas multimodalidad y describir los hallazgos claves. Es una revisión retrospectiva en el archivo computacional de nuestra institución. Selección de casos de divertículos de presentación inhabitual por sus características, localización u origen. En esófago los divertículos de Zenker y Killian-Jamieson. En estómago los divertículos gástricos infrecuentes. Los divertículos en intestino delgado tienen baja prevalencia, el más frecuente en duodeno. Los divertículos colónicos pueden tener una localización o presentación atípica. Los divertículos apendiculares y Meckel presentan baja prevalencia. Los divertículos digestivos son infrecuentes, excepto los colónicos. El radiólogo debe estar familiarizado con las diferentes ubicaciones de ellos, para reconocerlos y poder diagnosticarlos.

Published
2018

161. Spanish cohort profile, antithrombotic therapy and clinical outcomes at 1 year in the EORP atrial fibrillation long-term registry

Author

Marin, F, primary, Rivera-Caravaca, J, additional, Roldan-Rabadan, I, additional, Perez Cabeza, A, additional, Garcia Seara, J, additional, Bertomeu-Gonzalez, V, additional, Leal, M, additional, Garcia-Fernandez, A, additional, Tercedor Sanchez, L, additional, Ayarra, M, additional, Ciudad, M, additional, Castano, S, additional, Maestre, A, additional, Anguita, M, additional, and Garcia Bolao, I, additional

Published
2020
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164. Resistance to the most recent protease and non-nucleoside reverse transcriptase inhibitors across HIV-1 non-B subtypes

Author

Anta, Lourdes, Blanco, José L., Llibre, Josep M., García, Federico, Pérez-Elías, María J., Aguilera, Antonio, Pérez-Romero, Pilar, Caballero, Estrella, Vidal, Carmen, Cañizares, Angelina, Gutiérrez, Félix, Dalmau, David, Iribarren, José A., Soriano, Vicente, de Mendoza, Carmen, Iribarren, JA, Blanco, JL, Gatell, JM, Caballero, E, Ribera, E, Llibre, JM, Martínez-Picado, J, Clotet, B, Jaén, A, Dalmau, D, Peraire, J, Vidal, F, Vidal, C, Riera, M, Córdoba, J, López-Aldeguer, J, Galindo, MJ, Robledano, C, Gutiérrez, F, Álvarez, M, Chueca, N, García, F, Viciana, I, Santos, J, Pérez-Romero, P, Leal, M, Parra, M, Palomares, JC, Pineda, JA, Fernández-Cuenca, F, Rodríguez, C, del Romero, J, Menéndez-Arias, L, Pérez-Elías, MJ, Gutiérrez, C, Moreno, S, Pérez-Olmeda, M, Alcamí, J, Cañizares, A, Pedreira, J, Miralles, C, Ocampo, A, Morano, L, Rodríguez-Calviño, JJ, Aguilera, A, Gómez-Sirvent, JL, Anta, L, Poveda, E, Soriano, V, and de Mendoza, C

Published
2013
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174. Leukocyte arylsulfatase A activity in patients with alcohol-related cirrhosis

Author

Alvarez-Leal, M., Contreras-Hernandez, D., Chavez, Altagracia, Diaz-Contreras, J.A., Careaga-Olivares, J., Zuniga-Charles, M.A., Reynoso, M.C., and Hernandez-Tellez, A.

Subjects
Leukocytes -- Analysis, Liver cirrhosis -- Research, Alcoholics -- Care and treatment, Biological sciences
Abstract

This article discusses the possible dimineshment of arylsulfatase (ASA) in subjects with alcohol-related cirrhosis having encephalopathic manifestations. Results revealed that subjects with alcohol cirrhosis and encephalopathy showed less enzymatic activity than a control group, and subjects without encephalopathy showed an ASA value less than the control group.

Published
2001

175. Adsorption and uptake of Cu by Emiliana husleyi in naturl seawater

Author

Vasconcelos, M. Teresa S.D.; Leal, M. Fernanda C.

Subjects
Sea-water -- Research, Copper -- Research, Environmental issues, Science and technology, Porto, University of. Faculty of Science. Laquiapi Chemistry Department -- Research
Abstract

These short-term kinetic experiments conducted in nitrate- and phosphate-rich natural coastal seawater reveal that Emiliania huxleyi has the ability to uptake Cu very rapidly. The experiments were conducted by Laquipai, Chemistry Department, Faculty of Science, University of Porto in Portugal.

Published
2001

176. Lower expression of plasma-derived exosome miR-21 levels in HIV-1 elite controllers with decreasing CD4 T cell count

Author

Benito, J.M., Rallón, N., Restrepo, C., Rodríguez, N., García, M., Cabello, A., Gorgolas, M., Resino, S., Briz, V., Jiménez, M.A., Vázquez, M.S., Fernández, A., García, P., Muñoz, M.A., Sánchez, J., Jiménez, J.L., Sepúlveda, D., García, I., Consuegra, I., León, A., Arnedo, M., Plana, M., Climent, N., García, F., Ruiz-Mateos, E., Domínguez, B., Tarancón, L., Rafii-El-Idrissi, M., Polaino, M.J., Genebat, M., Viciana, P., Leal, M., Vidal, F., Rodríguez, E., Viladés, C., Peraire, J., Romero, J., Rodríguez, C, Vera, M., Esté, J., Ballana, E., Martínez, M.A., Franco, S., Nevot, M., Vallejo, A., Moreno, S., Pernas, M., Casado, C., López, C., Capa, L., Pérez, M., Alcami, J., Sanjuán, R., Cueva, J.M., Delgado, R., Sierra, O., Valenzuela, A., Ruiz-de-León, María J., Jiménez-Sousa, María A., Moreno, Santiago, García, Marcial, Gutiérrez-Rivas, Mónica, León, Agathe, Montero-Alonso, Marta, González-García, Juan, Resino, Salvador, Rallón, Norma, Benito, José M., and Vallejo, Alejandro

Published
2019
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181. Drug resistance mutations in patients infected with HIV-2 living in Spain

Author

Treviño, Ana, de Mendoza, Carmen, Caballero, Estrella, Rodríguez, Carmen, Parra, Patricia, Benito, Rafael, Cabezas, Teresa, Roc, Lourdes, Aguilera, Antonio, Soriano, Vincent, Rodríguez, C., del Romero, J., Tuset, C., Marcaida, G., Tuset, T., Caballero, E., Molina, I., Aguilera, A., Rodríguez-Calviño, J. J., Cortizo, S., Regueiro, B., Benito, R., Borrás, M., Ortiz de Lejarazu, R., Eiros, J. M., Miró, J. M., Lopez-Dieguez, M., Gutiérrez, M. M., Pumarola, T., García, J., Paz, I., Calderón, E., Medrano, F. J., Leal, M., Capote, F., Vallejo, A., Dronda, F., Moreno, S., Escudero, D., Pujol, E., Trigo, M., Diz, J., Álvarez, P., García-Campello, M., Rodríguez-Iglesias, M., Martín, A.M., Hernandez-Betancor, A., Ramos, J. M., Rodríguez, J. C., Gutiérrez, F., Gómez-Hernando, C., Guelar, A., Cilla, G., Pérez-Trallero, E., López-Aldeguer, J., Sola, J., Fernández-Pereira, L., Niubó, J., Veloso, S., Torres, A., López Lirola, A. M., Gómez Sirvent, J. L., Force, L., Cifuentes, C., García, J., Pérez, S., Raya, C., González-Praetorius, A., Mena, A., Pérez, J. L., Peñaranda, M., Montejo, J. M., Gutiérrez, M., Domingo, P., Roc, L., Martinez Sapiña, A., Viciana, I., Cabezas, T., Lozano, A., Fernandez, J. M., García, I., Gaspar, G., García, R., Gorgolas, M., Treviño, A., Parra, P., de Mendoza, C., and Soriano, V.

Published
2011
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