Atmospheric Aerosol
Mostrando 1-12 de 45 artigos, teses e dissertações.
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1. 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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2. Apresentação
ABSTRACT BACKGROUND: Exposure to particulate material produced as a result of increased agricultural activity may increase the number of pneumonia hospitalizations among children. We hope to contribute to the knowledge base through highlighting the environmental mechanisms involved in this outcome and optimizing pollutant control policies. OBJECTIVES: To
Trans/Form/Ação. Publicado em: 2020-03
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3. Influence of air pollutants on pneumonia hospitalizations among children in a town in the Brazilian Legal Amazon region: a time series study
ABSTRACT BACKGROUND: Exposure to particulate material produced as a result of increased agricultural activity may increase the number of pneumonia hospitalizations among children. We hope to contribute to the knowledge base through highlighting the environmental mechanisms involved in this outcome and optimizing pollutant control policies. OBJECTIVES: To
Sao Paulo Med. J.. Publicado em: 2020-03
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4. Elemental composition of PM10 and PM2.5 for a savanna (Cerrado) region of southern Amazonia
Brazil plays an important role with regard to the emission of aerosols into the atmosphere. Ecosystems such as the Amazonian tropical forest and Brazilian Cerrado are undergoing sweeping changes. These human activities promote an increase in the levels of gases and particles emitted into the atmosphere. To determine how these activities have affected the emi
Quím. Nova. Publicado em: 2016-12
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5. ANÁLISE DA CONCENTRAÇÃO E COMPOSIÇÃO DE AEROSSÓIS DE QUEIMADAS NO PANTANAL MATO-GROSSO
The Earth's atmosphere has a large number of small solid and liquid particles which differ in size, shape and composition. One of the most obvious characteristics of the phenomena of air pollution is linked to the occurrence of atmospheric aerosol. The research was conducted in a protected nature reserve, Private Natural Heritage Reserve (RPPN) Social Servic
Quím. Nova. Publicado em: 2016-09
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6. Electrified Water: Liquid, Vapor and Aerosol
Many reports associate electrostatic charge in dielectrics with water, either bulk, finely dispersed in aerosol or as atmospheric vapor. Two widespread but currently controversial assumptions relevant to this topic are the prevalence of electroneutrality and the passive role of water in electrical phenomena, dissipating charge due to its significant electric
J. Braz. Chem. Soc.. Publicado em: 2016-02
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7. Association between NOx exposure and deaths caused by respiratory diseases in a medium-sized Brazilian city
Exposure to nitrogen oxides (NOx) emitted by burning fossil fuels has been associated with respiratory diseases. We aimed to estimate the effects of NOx exposure on mortality owing to respiratory diseases in residents of Taubaté, São Paulo, Brazil, of all ages and both sexes. This time-series ecological study from August 1, 2011 to July 31, 2012 used infor
Braz J Med Biol Res. Publicado em: 29/09/2015
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8. Elementos traço em material particulado atmosférico de uma região agroindustrial do sudeste do Brasil
Trace element concentrations were measured in atmospheric particulate matter collected in 2009 and 2010, in a Brazilian region influenced by pre-harvest burning of sugar cane crops. For coarse particles, high concentrations of Al, Fe, K and Ca suggested that re-suspended soil dust was the main source of aerosol trace elements, subsequently confirmed by XRD a
Quím. Nova. Publicado em: 2013
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9. Efeito indireto dos aerossóis: observações em nuvens amazônicas em atmosfera poluída e na transição para limpa segundo os dados dos programas LBA/SMOCC/ENFIM! E AERONET/NASA. / Indirect effect of aerosols: observations in the Amazon clouds in polluted air and clean transition to the second program data LBA / SMOCC / AT LAST! And AERONET / NASA.
In the Brazilian Amazon, fires occur seasonally. The pollution generated because changes in time weather and climate of the Amazon. Studies have shown that the emission of particulate matter alters the radiative balance via direct effect (Solar radiation scattering and reflection.) and indirect aerosol (Increased concentration droplet and the cloud content l
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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10. Determinação e modelagem da taxa de consumo de biomassa queimada
O presente trabalho avalia o emprego da energia radiativa do fogo (ERF) para estimar as emissões de material particulado com diâmetro menor que 2,5µm (PM2,5µm), a partir da obtenção do coeficiente multiplicativo, que relaciona o consumo de biomassa com a ERF liberada. Para isto, foram utilizados dados provenientes dos produtos do MODIS (Moderate Resolu
Revista Brasileira de Meteorologia. Publicado em: 2012-03
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11. Previsão de tempo químico para a América do Sul:impacto das emissões urbanas nas escalas local e regional / Chemical weather forecast for South America: impact of urban emissions on local and regional scales
As médias e grandes cidades sul-americanas experimentaram nos últimos anos um constante crescimento demográfico, devido a aspectos socioeconômicos como a periurbanização e o êxodo rural. O aumento das emissões de gases traço tóxicos para a troposfera, devido à expansão urbana, e o consequente aumento da concentração dos gases secundários oriun
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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12. Aerossóis Atmosféricos: Medidas de Concentração sobre o Estado do Ceará. / Atmospheric Aerosols: Measurements of Concentration on the state of Ceara.
This work is a dissertation that aims to get standards in scientific measurements of the concentration of aerosols in the atmosphere over the State of Ceará and estimate empirical relationships between cloud condensation nuclei and nuclei of condensation on the basis of a set of supersaturation and the altitude. Data were used: the concentration of aerosols
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011