Atmospheric
Mostrando 1-12 de 1594 artigos, teses e dissertações.
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1. Mitigación de la formación de acrilamida en papas fritas tipo chips mediante la adición de antioxidantes fenólicos de Inca muña (Clinopodium bolivianum)
The aim of this study was to evaluate the influence of Inca muña phenolic antioxidants in the reduction of acrylamide (AA) in potato chips. The potatoes were cut into 2 mm thick slices, the addition of antioxidants was evaluated by immersion at atmospheric pressure and by vacuum impregnation (VI) at 80 kPa for 10 min. In both cases, two antioxidant concentr
Química Nova. Publicado em: 2022
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2. MGF Methods for Fixed and Gain Saturated Optically Preamplified FSO Links Impaired by Misalignments and Atmospheric Turbulence
Abstract The Gaussian approximation is commonly used to evaluate the performance of free space optical communication systems. However, other performance evaluation methods such as the saddle point approximation, Chernoff bound and the modified Chernoff bound have also been used. This paper investigates the performance of fixed and gain saturated optically pr
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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3. Oxigênio no contexto da COVID-19: o que sabemos sobre a molécula que respiramos e o papel central da química
OXYGEN IN THE COVID-19 CONTEXT: WHAT WE KNOW ABOUT THE MOLECULE WE BREATHE AND THE CENTRAL ROLE OF CHEMISTRY. In this work, the role of chemistry in the coronavirus disease 2019 (COVID-19) pandemic is highlighted through the medical oxygen supply crises in Brazil, as an example of oxygen utility in health. Starting from oxygen chemical characterization, the
Química Nova. Publicado em: 2022
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4. Effect of meteorological factors on first episode and recurrence of primary spontaneous pneumothorax
SUMMARY OBJECTIVE: In this study, we evaluated the clinical characteristics and seasonal distribution of patients with primary spontaneous pneumothorax and examined the relationships between meteorological factors and pneumothorax development overall and in terms of first episode and recurrence. METHODS: The hospital records of 168 pneumothorax patients tr
Revista da Associação Médica Brasileira. Publicado em: 2022
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5. A Captura-Apreensão de Animais Silvestres no Brasil: Relações com a Variabilidade Pluviométrica
Resumo Este estudo mostra um perfil da captura-apreensão de animais silvestres no Brasil, nas cinco regiões geográficas (Norte, Nordeste, Centro-Oeste, Sudeste e Sul). O objetivo foi identificar suas diferenças regionais, investigar suas variabilidades e relacionar suas características, com ênfase à variação da pluviometria das regiões. Os dados us
Revista Brasileira de Meteorologia. Publicado em: 2022
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6. Assimilação de Dados de Radiância do Sensor AMSU-A no GSI: Visão Geral sobre sua Importância para a Qualidade das Condições Iniciais na PNT do CPTEC. Assimilação de Dados de Radiância do Sensor AMSU-A no GSI/BAM/CPTEC: Descrição e Importância para a PNT
Resumo O Gridpoint Statistical Interpolation (GSI) é o sistema de assimilação de dados utilizado no Centro de Previsão de Tempo e Estudos Climáticos (CPTEC) do Instituto Nacional de Pesquisas Espaciais (INPE) desde 2013 e atualmente integra, de maneira acoplada ao Brazilian Global Atmospheric Model (BAM), o Sistema de Modelagem Global (SMG). Por meio da
Revista Brasileira de Meteorologia. Publicado em: 2022
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7. Chemical Constituents and Cytotoxic Activity of Rhinella jimi (Anura: Bufonidae)
Rhinella jimi toads (Stevaux, 2002) belong to the Bufonidae family, are endemic in the Brazilian Northeast and are commonly found during rainy periods. In general, amphibians of this family have in their poisons different metabolites that show a diversity of pharmacological activities. The isolation and identification of these compounds are of great importan
J. Braz. Chem. Soc.. Publicado em: 2021-05
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8. GASES DE NITROGÊNIO REATIVO COMO PRECURSORES DO AEROSSOL ATMOSFÉRICO: REAÇÕES DE FORMAÇÃO, PROCESSOS DE CRESCIMENTO E IMPLICAÇÕES AMBIENTAIS
The increased emissions of reactive nitrogen gases from anthropogenic sources to the atmosphere has been pointed out as responsible for triggering a series of environmental problems at the local, regional, and global scale. Among the many consequences associated with the excess of reactive nitrogen in the environment is the increase of atmospheric aerosol fo
Quím. Nova. Publicado em: 2021-04
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9. AVALIAÇÃO QUÍMICA DE LENHOS CARBONIZADOS DE Araucaria columnaris SOB DIFERENTES CONCENTRAÇÕES DE OXIGÊNIO COMO COMPARATIVO DE ANÁLISE DE charcoal FÓSSIL
In the face of environmental changes concerns, the study of climate change becomes essential to understand the life trajectory of planet earth. For this purpose, this work seeks to understand climate change and fluctuations in the amount of atmospheric oxygen across geological ages, carbonizing the Araucaria columnaris wood in varying oxygen concentrations,
Quím. Nova. Publicado em: 2021-03
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10. Avaliação do Brazilian Global Atmospheric Model na Simulação dos Componentes do Balanço de água na Bacia Amazônica
Resumo Nesse estudo avaliou-se o desempenho do Brazilian Global Atmospheric Model (BAM) na representação dos componentes do balanço de água na bacia Amazônica para o clima presente (1979-2015). Os resultados mostram que o modelo BAM reproduz a variação espaço-temporal dos componentes do balanço de água na bacia Amazônica, apesar da deficiência em
Rev. bras. meteorol.. Publicado em: 2021-03
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11. Multivariate Optimization of Extraction Variables of PAH in Particulate Matter (PM10) in Indoor/Outdoor Air at Campos dos Goytacazes, Brazil
Polycyclic aromatic hydrocarbons (PAH) are products of incomplete combustion of biomass and fossil fuels, that are produced on a larger scale by anthropogenic sources. Burning sugarcane plantations can be a source of atmospheric PAH in regions where this culture predominates. Campos dos Goytacazes, Brazil, is surrounded by sugarcane crops that still use fire
J. Braz. Chem. Soc.. Publicado em: 2021-03
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12. Numerical and experimental evaluation of the thermally stratified atmospheric boundary layer in wind tunnels
Abstract The atmospheric boundary layer (ABL) flow occurs due to the interaction between the Earth’s surface and atmosphere, and it usually happens under thermal stratification. Therefore, in order to emulate this phenomenon, atmospheric wind tunnels need appropriate devices, such as spires and cubical roughness elements, at the entrance of the wind tunnel
REM, Int. Eng. J.. Publicado em: 2021-01