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Your search keyword '"Rodríguez, Victoria"' showing total 35 results
Start Over Author "Rodríguez, Victoria" Publisher elsevier bv
35 results on '"Rodríguez, Victoria"'

3. Study of the influence of Nafion/C composition on electrochemical performance of PEM single cells with ultra-low platinum load

Author

Margarita Sánchez-Molina, Roberto Campana Prada, Leandro González Rodríguez, and Tonatiuh Alejandro Rodríguez Victoria

Subjects
Materials science, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electrochemistry, 01 natural sciences, Cathode, 0104 chemical sciences, Anode, Dielectric spectroscopy, law.invention, chemistry.chemical_compound, Fuel Technology, chemistry, Chemical engineering, law, Nafion, Electrode, 0210 nano-technology, Platinum, Power density
Abstract

The electrochemical performance of membrane electrode assemblies (MEAs) with ultra-low platinum load (0.02 mgPt cm−2) and different compositions of Nafion/C in the catalytic layer have been investigated. The electrodes were fabricated depositing the catalytic ink, prepared with commercial catalyst (HiSPEC 2000), onto the gas diffusion layers by wet powder spraying. The MEAs were electrochemically tested using current-voltage curves and electrochemical impedance spectroscopy measurements. The experiments were carried out at 70 °C in H2/O2 and H2/air as reactant gases at 1 and 2 bar pressure and 100% of relative humidity. For all MEAs tested, power density increases when the gasses pressure is increased from 1 to 2 bar. On the other hand, power density also increased when oxygen is used instead of air as oxidant gas in cathode. The lower power density (34 mW cm−2) and power per Pt loading (0.86 kW gPt−1) corresponds to the MEA prepared without Nafion in anode and cathode catalytic layers working with hydrogen and air at 1 bar pressure as reactants gas. The MEA with 30% wt Nafion/C reached the highest power density (422 mW cm−2) and power per Pt loading (10.60 kW gPt−1) using hydrogen and oxygen at 2 bar pressure. Finally, electrode surface microstructure and cross sections of MEAs were analyzed by Scanning Electron Microscopy (SEM). Examination of the electrodes, revealed that the most uniform ionomer network surface corresponds to the electrode with 40 wt% Nafion/C, and MEA ionomer-free catalytic layer shows delamination, it leads to low electrochemical performance.

Published
2021
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9. Prevalence of mild citrus tristeza virus isolates of the T30 genotype in Cuban commercial citrus fields after the dissemination of huanglongbing

Author

Llanes-Alvarez, Yilian, primary, Peña-Bárzaga, Inés, additional, Batista-Le Riverend, Lochy, additional, Pacheco, Ronal, additional, Zamora-Rodríguez, Victoria, additional, Benítez-Galeano, María José, additional, Rivas, Fernando, additional, Bertalmío, Ana, additional, and Hernández-Rodríguez, Lester, additional

Published
2021
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10. Formulation of a protocol to evaluate the aerobic granulation potential (AGP) of an inoculum

Author

Dayana Grisales Penagos, Jenny Rodríguez Victoria, and Mateo Villarraga Manrique

Subjects
Medical Laboratory Technology, Clinical Biochemistry
Abstract

This paper proposes and develops a protocol for measuring the aerobic granulation potential of sludge, aiming to provide an affordable and simple alternative that can facilitate the development of aerobic granulation technology. In this sense, the protocol comprises a set of parameters and considerations that interact to create a controlled environment and stimulate cell population clustering. All of this is done in the context of procedural simplicity, low cost, and the speed at which results are obtained. The protocol is essentially a three-stage method: preparation of the substrate, adaptation of the inoculum, and implementation of the protocol. Simple parameters were measured to evaluate the granulation process: SVI, settling velocity, and morphological parameters. The protocol was validated according to optimal ranges and criteria previously established in the literature. For this purpose, an activated sludge inoculum from a domestic wastewater treatment plant was submitted to the protocol, obtaining an optimal response of the biomass (SVI

Published
2022
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13. Implementation of NeoKissEs in Spain: A validated surveillance system for nosocomial sepsis in very low birth weight infants

Author

Madrid-Aguilar, Marisela, primary, López-Herrera, María Cruz, additional, Pérez-López, Javier, additional, Escudero-Argaluza, Julene, additional, Santesteban-Otazu, Elena, additional, Piening, Brar, additional, Villate-Navarro, José Ignacio, additional, Pijoán-Zubizarreta, José Ignacio, additional, Laya, Teresa Jesús Agra, additional, Ojembarrena, Almudena Alonso, additional, Sanz, Israel Anquela, additional, Cuevas, Yolanda Armendáriz, additional, Alfonso, Cristina Barcelona, additional, Mosquera, José Beceiro, additional, Caamaño, María Bengoa, additional, Sendín, Elena Bergón, additional, Vilaplana, Lucía Cabanillas, additional, González, Fernando Cabañas, additional, Cogul, Eva Capdevila, additional, Lax, Javier Casanovas, additional, Badía, María Cernada, additional, Cotallo, Gil Daniel Coto, additional, Suárez, Pilar Adelaida Crespo, additional, Terán, María Isabel de las Cuevas, additional, Comeche, Laura Domingo, additional, Martín, Izaskun Dorronsoro, additional, Lorenzo, Pilar Espiño, additional, Bellart, Marta Estalella, additional, Capell, Francisco Javier Estañ, additional, Colomer, Belén Fernández, additional, Trisac, José Luis Fernández, additional, Pradel, Zenaida Galve, additional, Cabezas, Miguel Ángel García, additional, Franco, María García, additional, García, María Jesús García, additional, Rodríguez, Victoria Eugenia García, additional, Mozo, Rafael García, additional, Sánchez, Rubén García, additional, Rodrigo, Fermín García-Muñoz, additional, Esteban, Silvia Garrido, additional, Armengod, Carmen González, additional, Carretero, Paloma González, additional, López, María González, additional, Asencio, María Mercedes Granero, additional, Hernández, José María Hernández, additional, López, María Elena Infante, additional, Sebastián, Ana Irasarri, additional, Parrilla, Francisco J Jiménez, additional, Parrilla, Pedro J Jiménez, additional, Aristizabal, María Isabel Larburu, additional, Azorín, Manuela López, additional, Goya, Juan María López de Heredia, additional, Oliva, Jesús Cecilio López-Menchero, additional, Lagares, Salud Luna, additional, Pérez, Carmen Luz Marrero, additional, Tallo, Emilia María Martínez, additional, Gutiérrez, Andrés Martínez, additional, Jiménez, María Dolores Martínez, additional, Fernández, María de los Ángeles Martínez, additional, Ruiz, Raquel Mendiola, additional, Miralles, María Leticia Millán, additional, Vives, Alicia Mirada, additional, Cabrillana, Jesús Molina, additional, Calderón, Elisenda Moliner, additional, Arnal, Icíar Olabarrieta, additional, Delgado, Antonio Pavón, additional, Legorburu, Alberto Pérez, additional, Muñuzuri, Alejandro Pérez, additional, Pisón, Raquel Pinillos, additional, Gracia, Segundo Rite, additional, Rodríguez, Sonia M Rivero, additional, Blanco, Silvia Rodríguez, additional, Modamio, Gerardo Romera, additional, Roigés, María Dolors Salvia, additional, Fernández, Mario Sánchez, additional, Arenas, Antonio Segado, additional, Mir, Eduard Solé, additional, Busselo, Itziar Sota, additional, Fernández, Joaquín Suárez, additional, Fargueta, José Luis Tarazona, additional, Tripodi, Cinzia, additional, Faci, María Purificación Ventura, additional, and González., Javier Vilas, additional

Published
2019
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14. SU112DOES POLYGENIC RISK SCORE FOR SCHIZOPHRENIA IMPACT ON JUMPING TO CONCLUSIONS? PRELIMINARY FINDINGS FROM THE EU-GEI CASE-CONTROL STUDY

Author

Tripoli, Giada, primary, Quattrone, Diego, additional, Gayer-Anderson, Charlotte, additional, Rodríguez, Victoria, additional, Benzian-Olsson, Natasha, additional, Ferraro, Laura, additional, La Cascia, Caterina, additional, Sartorio, Crocettarachele, additional, Sideli, Lucia, additional, Seminerio, Fabio, additional, La Barbera, Daniele, additional, Morgan, Craig, additional, Sham, Pak, additional, Forti, Marta Di, additional, and Murray, Robin, additional

Published
2019
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17. F115POLYGENIC RISK SCORES FOR SCHIZOPHRENIA, BIPOLAR, AND MAJOR DEPRESSIVE DISORDERS PREDICT TRANSDIAGNOSTIC SYMPTOM DIMENSIONS AT FIRST EPISODE PSYCHOSIS

Author

Quattrone, Diego, primary, Reininghaus, Ulrich, additional, Vassos, Evangelos, additional, Sham, Pak, additional, Ferraro, Laura, additional, Tripoli, Giada, additional, Rodríguez, Victoria, additional, Morgan, Craig, additional, Van Os, Jim, additional, Rutten, Bart, additional, O'Donovan, Michael, additional, Richards, Alexander, additional, Murray, Robin, additional, Forti, Marta Di, additional, and Lewis, Cathryn, additional

Published
2019
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35. F115POLYGENIC RISK SCORES FOR SCHIZOPHRENIA, BIPOLAR, AND MAJOR DEPRESSIVE DISORDERS PREDICT TRANSDIAGNOSTIC SYMPTOM DIMENSIONS AT FIRST EPISODE PSYCHOSIS

Author

Victoria Rodriguez, Jim van Os, Cathryn M. Lewis, Bart P. F. Rutten, Robin M. Murray, Alexander Richards, Michael Conlon O'Donovan, Laura Ferraro, Craig Morgan, Diego Quattrone, Giada Tripoli, Marta Di Forti, Pak C. Sham, Evangelos Vassos, Ulrich Reininghaus, Quattrone, Diego, Reininghaus, Ulrich, Vassos, Evangelo, Sham, Pak, Ferraro, Laura, Tripoli, Giada, Rodríguez, Victoria, Morgan, Craig, Van Os, Jim, Rutten, Bart, O'Donovan, Michael, Richards, Alexander, Murray, Robin, Forti, Marta Di, and Lewis, Cathryn

Subjects
Pharmacology, medicine.medical_specialty, business.industry, polygenic, psychosis, spectrum, symptoms, medicine.disease, Psychiatry and Mental health, Neurology, Schizophrenia, First episode psychosis, medicine, Pharmacology (medical), Neurology (clinical), business, Psychiatry, Settore MED/25 - Psichiatria, Biological Psychiatry
Abstract

Background: The value of the nosological distinction between non-affective and affective psychosis has consistently been challenged. Indeed, psychotic syndromes are composed of dimensions of psychopathology cutting across diagnostic boundaries. Such transdiagnostic symptom dimensions might be enhanced phenotypes to test for association with common genetic variants for Major Mental Disorders (MMDs) as summarized by Polygenic Risk Scores (PRSs) for Schizophrenia (SZ), Bipolar Disorder (BP), and Major Depressive Disorder (MDD). The objectives of this study were to: 1) identify the symptom dimension structure at First Episode Psychosis (FEP); 2) examine the extent to which MMDs PRSs explain the phenotypic variance due to symptom dimensions. Methods: OPCRIT psychopathology items were analysed using multidimensional item response modelling in Mplus to estimate unidimensional, multidimensional, and bi-factor models of psychosis. Model fit statistics included LogLikelihood, and Akaike and Bayesian Information Criteria to compare these models. SZ, BP, and MDD PRSs were built using the results from large mega-analyses from the Working Groups of the Psychiatric Genomics Consortium. In PRSice, individuals’ number of risk alleles in the target sample was weighted by the log odds ratio from the discovery samples, and summed into the three PRSs for SZ, BP, and MDD. These PRSs were calculated at a fixed 0.05 P-value SNP threshold. Regression models were fitted to predict symptom dimensions’ scores as continuous outcomes from the three PRSs. These model, conducted in STATA14, were adjusted for age, gender, and 20 principal components for population stratification. Results: The best model fit statistics was observed for the bi-factor model including one general and five specific dimensions of positive, negative, disorganization, manic and depressive symptoms. A positive linear association was observed between SZ PRS and the positive dimension t(789)=2.04, p

Published
2019
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