Results 31 to 40 of about 4,033 (146)

Análise do comportamento das trovoadas no estado de alagoas, previsão à curto prazo Analysis of the behavior of thunderstorms in alagoas state, short-term forecasting

open access: yesRevista Brasileira de Meteorologia, 2011
A frequência de trovoadas a partir de dados de satélite TRMM e do DECEA foi estudada para o período de 10 anos (de 1998 até 2007), onde se observou que as trovoadas foram mais frequentes nos meses de verão, com maior ocorrência no mês de março.
Bruno Miranda de Brito   +6 more
doaj   +1 more source

Photo‐Fenton Degradation of RB5 Dye in Aqueous Solution Using Fe Supported on Mexican Natural Zeolite

open access: yesInternational Journal of Photoenergy, Volume 2019, Issue 1, 2019., 2019
A Mexican natural zeolite (MNZ) was impregnated with Fe at concentrations of 5 and 10 mg FeCl3/g MNZ (MNZ/Fe) in order to study the photo‐Fenton degradation of Reactive Black 5 (RB5) dye. Two samples were prepared and calcined at 550 and 700°C for each concentration.
José Domenzain-Gonzalez   +4 more
wiley   +1 more source

Material didático sobre termodinâmica para turmas IME - ITA [PDF]

open access: yes, 2022
O material forjado neste projeto final de curso tem por finalidade fornecer ao estudante que deseja ingressar nas instituições do Instituto Militar de Engenharia e Instituto Tecnológico Aeronáutico, um conteúdo completo e nivelado.
Nascimento, Wesley Cândido do
core  

Tabelas de Termodinâmica

open access: yes, 2016
Na realização destas tabelas procurou-se incluir as propriedades dos fluídos mais utilizados nas cadeiras de Termodinâmica, mecânica dos fluídos e transferência de calor, bem como as propriedades de algumas substâncias sólidas utilizadas em cadeiras de ...
Coelho, Paulo M.; Universidade do Porto
core   +3 more sources

Princípios e aplicação termodinâmica através da produção de um dispositivo desenvolvido com material alternativo

open access: yesOrbital: The Electronic Journal of Chemistry, 2014
O presente trabalho traz a descrição de um dispositivo que opera em ciclos, convertendo energia térmica em trabalho mecânico (de acordo com os princípios da Termodinâmica, porém considerando-o do ponto de vista real e não o ideal).
R. de Paula, S. S. Nascimento
doaj   +1 more source

Squalene Extraction by Supercritical Fluids from Traditionally Puffed Amaranthus hypochondriacus Seeds

open access: yesJournal of Food Quality, Volume 2017, Issue 1, 2017., 2017
Extraction of squalene, a potent natural antioxidant, from puffed A. hypochondriacus seeds was performed by supercritical fluid extraction (SCFE); besides, to have a blank for comparison, extraction was performed also by Soxhlet method using organic solvents (hexane). Chemical proximal composition and seed morphology were determined in raw, puffed, and
Teresa Rosales-García   +7 more
wiley   +1 more source

Impact of Molecular Design and Conjugation in Diammonium A′‐Cations on the Photovoltaic Performance of Quasi‐2D Perovskite Solar Cells

open access: yesSolar RRL, Volume 9, Issue 24, December 2025.
The chemical nature of the spacer cations employed in quasi‐2D metal halide perovskites (MHPs) matters in the performance of the perovskite solar cells (PSCs).This study presents three π‐conjugated diammonium spacers based on diphenylacetylene and on a biphenyl core flanked by alkyne moieties, which were synthesized to prepare quasi‐2D MHP thin films ...
Susana Ramos‐Terrón   +8 more
wiley   +1 more source

Ensino de termodinâmica através de experimentos de baixo custo [PDF]

open access: yes, 2023
GOMES, Adriano Otindio. Ensino de termodinâmica através de experimentos de baixo custo. 2023. 52f. Monografia - Curso de Física, Instituto de Ciências Exatas e da Natureza, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção ...
Gomes, Adriano Otindio
core  

Catalase‐Based Air‐Cathode for Biocompatible Zinc–Air Battery

open access: yesChemCatChem, Volume 17, Issue 3, February 6, 2025.
This article highlights the use of catalase (CAT) as electrocatalyst for the oxygen reduction reaction (ORR) in the air electrode of zinc–air batteries (ZABs). CAT immobilized with Nafion on electrode surfaces demonstrates great long‐term stability, exhibiting direct electrochemical response and retaining its bioactivity. CAT‐Nafion ZAB provides better
Valentín García‐Caballero   +6 more
wiley   +1 more source

Mechanochemically Synthesized RuO2‐Doped LaMnO3 Perovskites as Bifunctional Cathodes for Rechargeable Zn/Air Batteries

open access: yesChemCatChem, Volume 16, Issue 21, November 11, 2024.
This article highlights the synthesis of new LaMnO3 perovskites in which RuO2 has been incorporated in order to increase its behavior as an electrocatalyst for the oxygen evolution reaction (OER). Air electrodes made with this catalyst have been tested in zinc‐air batteries, demonstrating a significant improvement in energy efficiency for a long life ...
Katherine Jejen   +4 more
wiley   +1 more source

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