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697 results on '"Soares, Raquel"'

28. Green Fabrication of Stackable Laser‐Induced Graphene Micro‐Supercapacitors under Ambient Conditions: Toward the Design of Truly Sustainable Technological Platforms.

Author

Silvestre, Sara L., Morais, Maria, Soares, Raquel R. A., Johnson, Zachary T., Benson, Eric, Ainsley, Elisabeth, Pham, Veronica, Claussen, Jonathan C., Gomes, Carmen L., Martins, Rodrigo, Fortunato, Elvira, Pereira, Luis, and Coelho, João

Subjects
SUSTAINABLE design, SUPERCAPACITOR electrodes, BIODEGRADABLE materials, GRAPHENE, ENERGY storage, CARBON dioxide lasers
Abstract

Extensive research into green technologies is driven by the worldwide push for eco‐friendly materials and energy solutions. The focus is on synergies that prioritize sustainability and environmental benefits. This study explores the potential of abundant, non‐toxic, and sustainable resources such as paper, lignin‐enriched paper, and cork for producing laser‐induced graphene (LIG) supercapacitor electrodes with improved capacitance. A single‐step methodology using a CO2 laser system is developed for fabricating these electrodes under ambient conditions, providing an environmentally friendly alternative to conventional carbon sources. The resulting green micro‐supercapacitors (MSCs) achieve impressive areal capacitance (≈7–10 mF cm−2) and power and energy densities (≈4 μW cm‐2 and ≈0.77 µWh cm−2 at 0.01 mA cm−2). Stability tests conducted over 5000 charge–discharge cycles demonstrate a capacitance retention of ≈80–85%, highlighting the device durability. These LIG‐based devices offer versatility, allowing voltage output adjustment through stacked and sandwich MSCs configurations (parallel or series), suitable for various large‐scale applications. This study demonstrates that it is possible to create high‐quality energy storage devices based on biodegradable materials. This development can lead to progress in renewable energy and off‐grid technology, as well as a reduction in electronic waste. [ABSTRACT FROM AUTHOR]

Published
2024
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35. The combination of traditional and auricular acupuncture to prevent xerostomia and anxiety in irradiated patients with HNSCC: a preventive, parallel, single-blind, 2-arm controlled study

Author

Menezes, Agna Soares da Silva, Sanches, Gabriela Luize Guimarães, Gomes, Emisael Stênio Batista, Soares, Raquel Gusmão, Durães, Cristina Paixão, Fonseca, Larissa Lopes, Filho, Arlen de Paulo Santiago, Ribeiro, Adriana Aparecida Almeida de Aguiar, Nascimento, Jairo Evangelista, Santos, Sérgio Henrique Sousa, de Paula, Alfredo Maurício Batista, Farias, Lucyana Conceição, and Guimarães, André Luiz Sena

Published
2021
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36. AQUISIÇÃO TARDIA DA LIBRAS COMO L1 POR PESSOAS SURDAS: UMA REVISÃO INTEGRATIVA

Author

Cabral, Pamela Carvalho Dias, primary, Pereira, Tiago Cabral, additional, Soares, Charley Pereira, additional, Marques, Mailson Matos, additional, Soares, Wellington Danilo, additional, Correa, Priscilla Duarte Soares, additional, Freitas, Daniel Antunes, additional, Pereira, Daniane, additional, Barroso, Hélida Cristine Santos Mendes, additional, and Soares, Raquel Schwenck de Mello Vianna, additional

Published
2022
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49. Fluorescence in the estimation of chlorophyll-a in public water reservoirs in the Brazilian cerrado.

Author

de Barros, Lucélia Souza, de Almeida, Tati, Soares, Raquel Moraes, Batista, Bruno Dias, Borges, Henrique Dantas, Cicerelli, Rejane Ennes, and Mitrovic, Simon

Abstract

Context. The usual strategy for monitoring of eutrophication process is the use of traditional limnological methods, based on laboratory analysis. These procedures involve costly and time consuming analyses, usually with in vitro methodologies, which can still have limitations in terms of sensitivity and reliability, if poorly managed. Phytoplankton pigments, such as chlorophyll-a (Chl-a), are highly fluorescent and can provide the environmental status of water bodies. Aims. This study aims to analyse, compare and evaluate an estimation of Chl-a through fluorescence in public water sources in the Brazilian cerrado. Exploratory statistical analyses were conducted by using absolute fluorescence units (AFU) and relative fluorescence units (RFU) compared with traditional laboratory data (standard procedure for the determination of Chl-a by spectroscopic methods) to evaluate the significance of differences in estimating Chl-a concentration. Subsequently, empirical models, based on spectral band combinations, were generated to convert fluorescence measurement in Chl-a concentration, by linear regression. Key results. The generated model found a strong correlation and coefficient of determination (r = 0.88; R² = 0.78). The efficiency of the model was also confirmed by statistical indicators (RMSE = 1.27, MAPE = 26.72 and BIAS = -6.32). Conclusions. We concluded that the estimate of Chl-a through RFU was better than through AFU. Implications. Therefore, based on the results of this study, it is recommended that RFU be used to obtain more precise and accurate estimates of Chl-a concentration through empirical models based on linear regression. [ABSTRACT FROM AUTHOR]

Published
2024
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