Search

Your search keyword '"Nicolau, Eduardo"' showing total 171 results
Start Over Author "Nicolau, Eduardo"
171 results on '"Nicolau, Eduardo"'

2. Prevalence of congenital cytomegalovirus infection in preterm, small for gestational age and low birth weight newborns: characteristics and cytokines profile

Author

Lino, Janaina Fortes, Diniz, Lilian Martins Oliveira, de Miranda, Débora Marques, Rosa, Daniela Valadão Freitas, Silva, Nathália Gualberto Souza e, de Souza Nicolau, Eduardo, Rezende, Larissa Gonçalves, Carvalho, Lais Silva, de Paula Lopes, Marianna Fischer, Correa, Luísa Petri, de Oliveira, Gabriela Mafra, da Silva Alves, Flávia Miranda, Pascoal, Lorena Batista, da Costa, Érika Lima Dolabella Teixeira, Anchieta, Lêni Márcia, and de Castro Romanelli, Roberta Maia

Published
2022
Full Text
View/download PDF

7. Brain-enriched MicroRNA-184 is downregulated in older adults with major depressive disorder: A translational study

Author

Mendes-Silva, Ana Paula, Fujimura, Patricia Tiemi, Silva, Jéssica Regina da Costa, Teixeira, Antonio Lucio, Vieira, Erica Marciano, Guedes, Pedro Henrique Gonçalves, Barroso, Lucélia Scarabeli Silva, Nicolau, Mariana de Souza, Ferreira, Jéssica Diniz Rodrigues, Bertola, Laiss, Nicolau, Eduardo de Souza, Tolentino-Araújo, Gesiane Thamire, Berlezzi, Camila Moreira Silva Ferreira, Rodrigues, Tamiris Sabrina, Borges, Luiza Diniz Ferreira, Gomes, Matheus de Souza, Amaral, Laurence Rodrigues do, Bonetti, Ana Maria, Ueira-Vieira, Carlos, and Diniz, Breno Satler

Published
2019
Full Text
View/download PDF

18. Cognitive effort and pupil dilation in controlled and automatic processes

Author

Querino Emanuel, dos Santos Lafaiete, Ginani Giuliano, Nicolau Eduardo, Miranda Débora, Romano-Silva Marco, and Malloy-Diniz Leandro

Subjects
pupillary diameter, executive functions, psychological evaluation, cognitive effort, neuropsychology, five digits test, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571
Abstract

The Five Digits Test (FDT) is a Stroop paradigm test that aims to evaluate executive functions. It is composed of four parts, two of which are related to automatic and two of which are related to controlled processes. It is known that pupillary diameter increases as the task’s cognitive demand increases. In the present study, we evaluated whether the pupillary diameter could distinguish cognitive effort between automated and controlled cognitive processing during the FDT as the task progressed. As a control task, we used a simple reading paradigm with a similar visual aspect as the FDT. We then divided each of the four parts into two blocks in order to evaluate the differences between the first and second half of the task. Results indicated that, compared to a control task, the FDT required higher cognitive effort for each consecutive part. Moreover, the first half of every part of the FDT induced dilation more than the second. The differences in pupil dilation during the first half of the four FDT parts were statistically significant between the parts 2 and 4 (p=0.023), and between the parts 3 and 4 (p=0.006). These results provide further evidence that cognitive effort and pupil diameter can distinguish controlled from automatic processes.

Published
2015
Full Text
View/download PDF

20. Zwitterionic and Photocatalytic Janus Membrane Based on Diethylamine N-Oxide Group and WS2Nanosheets for Dye Removal in Forward Osmosis

Author

Bermúdez-Morales, Luis, Lizardi, Leonardo, Santiago-Martoral, Liz, Cruz-Tato, Perla, and Nicolau, Eduardo

Abstract

The search for innovative materials with unique properties to aid in the remediation of polluted water effluents is increasingly imperative. Herein, we present the fabrication of a Janus membrane operated in forward osmosis mode that combines the advantages of polymeric and semiconducting materials. This membrane was prepared postmodifying a polysulfone backbone with the zwitterionic group amine N-oxide (DEAO). Then, a thin layer of WS2nanosheets was deposited over the membrane to incorporate a photosensitive layer. The fabricated membranes were thoroughly characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), surface Z-potential, and water contact angle (CA). The performance of the prepared membranes was assessed in terms of the water permeance and their ability to degrade a model dye (rhodamine B (RhB)). The results suggest the photodegradation of the RhB above 92% and 98% after 8 and 12 h, respectively. These degradation performances are almost 20% higher than the control membranes, and reactive oxygen species (ROS) are likely formed by the WS2nanosheets, which accelerates the degradation process. These results are encouraging, as this technology may open the door to fabricating membranes with dual functions.

Published
2023
Full Text
View/download PDF

21. Autonomous Electrochemical System for Ammonia Oxidation Reaction Measurements at the International Space Station

Author

Cabrera, Carlos, primary, Morales-Navas, Camila, additional, Martinez, Roberto Rodriguez, additional, Vidal-Iglesias, Francisco, additional, Peña-Duarte, Armando, additional, Soto-Pérez, Joesene, additional, Trinidad-Pérez, Pedro, additional, Solla-Gullón, José, additional, Tzvetkov, Toshko, additional, Smotkin, Eugene, additional, Nicolau, Eduardo, additional, Feliu, Juan, additional, and Doan, Jonathan, additional

Published
2022
Full Text
View/download PDF

41. Transcranial Direct Current Stimulation (tDCS) in Mice

Author

de Souza Nicolau, Eduardo, primary, de Alvarenga, Kevin Augusto Farias, primary, Tenza-Ferrer, Helia, primary, Nogueira, Matheus Carvalho Alves, primary, Rezende, Fernanda Donizete, primary, Nicolau, Nycolle Ferreira, primary, Collodetti, Mélcar, primary, de Miranda, Débora Marques, primary, Magno, Luiz Alexandre Viana, primary, and Romano-Silva, Marco Aurélio, primary

Published
2018
Full Text
View/download PDF

42. Aptamer-Based Impedimetric Assay of Arsenite in Water: Interfacial Properties and Performance

Author

Vega-Figueroa, Karlene, primary, Santillán, Jaime, additional, Ortiz-Gómez, Valerie, additional, Ortiz-Quiles, Edwin O., additional, Quiñones-Colón, Beatriz A., additional, Castilla-Casadiego, David A., additional, Almodóvar, Jorge, additional, Bayro, Marvin J., additional, Rodríguez-Martínez, José A., additional, and Nicolau, Eduardo, additional

Published
2018
Full Text
View/download PDF

44. Chronoamperometric Study of Ammonia Oxidation in a Direct Ammonia Alkaline Fuel Cell under the Influence of Microgravity

Author

Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Acevedo, Raul, Poventud-Estrada, Carlos M., Morales-Navas, Camila, Martínez-Rodríguez, Roberto A., Ortiz-Quiles, Edwin, Vidal-Iglesias, Francisco J., Solla-Gullón, José, Nicolau, Eduardo, Feliu, Juan M., Echegoyen, Luis, Cabrera, Carlos R., Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Acevedo, Raul, Poventud-Estrada, Carlos M., Morales-Navas, Camila, Martínez-Rodríguez, Roberto A., Ortiz-Quiles, Edwin, Vidal-Iglesias, Francisco J., Solla-Gullón, José, Nicolau, Eduardo, Feliu, Juan M., Echegoyen, Luis, and Cabrera, Carlos R.

Abstract

This is a study of the chronoamperometric performance of the electrochemical oxidation of ammonia in an alkaline fuel cell for space applications. Under microgravity the performance of a fuel cell is diminished by the absence of buoyancy since nitrogen gas is produced. The following catalysts were studied: platinum nanocubes of ca. 10nm, platinum nanocubes on carbon Vulcan ™ and platinum on carbon nanoonion support of ca. 10nm. These nanomaterials were studied in order to search for catalysts that may reduce or counter the loss of ammonia oxidation current densities performance under microgravity conditions. Chronoamperometries at potential values ranging from 0.2 V to 1.2V vs. cathode potential (breathing Air/300ml/min/82737 Pa) in 1.0 M NH4OH (30ml/min in anode) were done during over 30 parabolas in NASA’s C9 airplane The Weightless Wonder in January 2016 from Ellington Field Houston. The current densities at 15s in the chronoamperometry experiments showed diminishing values under microgravity and in some cases improvements of up to 92%, for Pt-carbon nanoonions, and over 70% for the three catalysts versus ground at potentials ranging from 0.2 to 0.4V after 5 minutes of chronoamperometric conditions. At higher potentials, 1.0V or higher, Pt nanocubes and Pt-carbon nanoonions showed enhancements of up to 32% and 24%, respectively. At these higher potentials we will have a contribution of oxygen evolution. The changes in current behavior are attributed to the sizes of the catalyst materials and the time needed for the N2 bubbles detachment from the Pt surface under microgravity conditions.

Published
2017

48. Antimicrobial Polymer–Peptide Conjugates Based on Maximin H5 and PEG to Prevent Biofouling of E. coliand P. aeruginosa

Author

Ortiz-Gómez, Valerie, Rodríguez-Ramos, Victor D., Maldonado-Hernández, Rafael, González-Feliciano, José A., and Nicolau, Eduardo

Abstract

Many pathogens, such as Pseudomonas aeruginosaand Escherichia colibacteria can easily attach to surfaces and form stable biofilms. The formation of such biofilms in surfaces presents a problem in environmental, biomedical, and industrial processes, among many others. Aiming to provide a plausible solution to this issue, the anionic and hydrophobic peptide Maximin H5 C-terminally deaminated isoform (MH5C) has been modified with a cysteine in the C-terminal (MH5C-Cys) and coupled to polyethylene glycol (PEG) polymers of varying sizes (i.e., 2 kDa and 5 kDa) to serve as a surface protective coating. Briefly, the MH5C-Cys was bioconjugated to PEG and purified by size exclusion chromatography while the reaction was confirmed via SDS-PAGE and MALDI ToF. Moreover, the preventive antimicrobial activity of the MH5C-Cys-PEG conjugates was performed via the growth curves method, showing inhibition of bacterial growth after 24 h. The efficacy of these peptide–polymer conjugates was extensively characterized via scanning electron microscopy (SEM), minimum inhibition concentration (MIC), minimum biofilm inhibition concentration (MBIC), and minimum biofilm eradication concentration (MBEC) assays to evaluate their ability to eradicate and prevent the biofilms. Interestingly, this work demonstrated a critical PEG polymer weight of 5 kDa as ideal when coupled to the peptide to achieve inhibition and eradication of the biofilm formation in both bacteria strains. According to the MICs (40 μM) and MBICs (300 μM), we can conclude that this conjugate (MH5C-Cys-5 kDa) has an action that prevents/inhibits the formation of biofilms and the eradication of biofilms (MBEC 500 μM). In contrast, the MH5C-Cys peptide with PEG polymer of 2 kDa did not show inhibition or eradication of the biofilms.

Published
2020
Full Text
View/download PDF

49. Polymer‐MTiO3 (M = Ca, Sr, Ba) composites as facile and scalable supercapacitor separators.

Author

Alvarez‐Sanchez, Christian O., Lasalde‐Ramírez, José A., Ortiz‐Quiles, Edwin O., Massó‐Ferret, Roberto, and Nicolau, Eduardo

Subjects
ALKALINE earth metals, MACHINE separators, PERMITTIVITY, POLYVINYLIDENE fluoride, DIELECTRIC properties, SCANNING electron microscopy
Abstract

The quantum of research in the area of supercapacitors is typically focused on the electrode materials. As such, there are many opportunities for the optimization of the other components, such as the separators, to further increase the power, efficiency, and longevity of supercapacitors. To contribute to this field of research, we present an innovative alternative for the fabrication of separators; using polymer/ceramic composites (PCC) based on polyvinylidene fluoride (PVDF) and polypropylene (PPG) mixed with different alkaline earth metal‐based titanates (eg barium, calcium, and strontium). The PCC separators were prepared via phase inversion precipitation technique, a feasible and scalable method for the fabrication of these composites. Different additives were used to modulate the porosity and thus, improve the charge transfer rates. Then, a heating process ensured a uniform organization of the composites. Furthermore, we tested the effect of thermally annealing the ceramics on the separators' performance. The precursor materials and the PCC's were extensively characterized by means of X‐ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical, mechanical, and dielectric properties of the PCC's were measured and compared to common commercial separators used today. Results suggest that thermal treatment improves tensile strength of the separators by at least ca. 60% without compromising the similar electrochemical profile to the commercial separators (44.52 ± 2.82 Ω vs 67.65 ± 29.01 Ω). Lastly, all of the fabricated PCC's showed higher dielectric constants (4.52 in average for the as prepared separators and 2.99 for the heated PCC's) than the polymer based commercial separators (2.2). [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

50. P3-175: Biological Pathways Found in Common Between Alzheimer’s Disease and Major Depression: A Study on Microrna Expression in a Systematic Review

Author

MendesM Silva, Ana Paula, primary, de SouzaS Nicolau, Eduardo, additional, Pereira, Kelly Silva, additional, Fiaux do Nascimento, Kenia Kelly, additional, SilvaMS Ferreira, Camila Moreira, additional, TolentinoTT Araujo, Gesiane Thamire, additional, Diniz, Breno Satler, additional, and Teixeira, Antônio Lúcio, additional

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results