Atmospheric Chemistry
Mostrando 1-12 de 52 artigos, teses e dissertações.
-
1. 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
-
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
-
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
-
4. REVISITING IDEAL GASES AND PROPOSAL OF A SIMPLE EXPERIMENT FOR DETERMINING ATMOSPHERIC PRESSURE IN THE LABORATORY
Relevant historical aspects concerning ideal gases were briefly reviewed to provide a condensed resource for the undergraduate student of chemistry. The importance of the barometer and the concept of atmospheric pressure were reviewed and discussed. A combination of Boyle's law with the well-known equation for determining the pressure produced by a column of
Quím. Nova. Publicado em: 2018-07
-
5. SOLUBILIDADE E REATIVIDADE DE GASES
This paper deals with the solubility and reactivity of gases, especially in water, covering the main aspects that influence the dissolution process, namely polarizability of atoms or molecules in gas phase and their ability to react with the solvent. The discussion highlights the importance of solubility of gases in several biological processes, such as resp
Quím. Nova. Publicado em: 2017-08
-
6. The Use of an Atmospheric Model to Simulate the Rocket Exhaust Effluents Transport and Dispersion for the Centro de Lançamento de Alcântara
ABSTRACT: This paper introduces a new approach to represent the rocket exhaust effluents into an atmospheric dispersion model considering the trajectory and variable burning rates of a Satellite Vehicle Launcher, taking into account the buoyancy of the exhausted gases. It presents a simulation for a Satellite Vehicle Launcher flight at 12:00Z in a typical da
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
-
7. METODOLOGIA EXPERIMENTAL PARA REAÇÕES GÁS-LÍQUIDO
Although the gas-liquid reactions are employed in many industrial processes, this issue in the most of time is not included in the curriculum of Chemistry and Chemical Engineering courses. This work aims to propose the study of gas-liquid reaction for the degree course, considering a widespread system, the reaction of CO2-NaOH. A reaction mechanism was propo
Quím. Nova. Publicado em: 2016-06
-
8. Application of post-discharge region of atmospheric pressure argon and air plasma jet in the contamination control of Candida albicans biofilms
Introduction:Candida species are responsible for about 80% of hospital fungal infections. Non-thermal plasmas operated at atmospheric pressure are increasingly used as an alternative to existing antimicrobial strategy. This work investigates the action of post-discharge region of a non-thermal atmospheric plasma jet, generated by a gliding arc reactor, on bi
Res. Biomed. Eng.. Publicado em: 27/11/2015
-
9. 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
-
10. 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
-
11. Medição do aporte atmosférico dos elementos-traço nos municípios de Campinas e Paulínia com auxílio da espécie vegetal Tillanásia usneoides (L.) / Measurement of atmospheric supply of trace elements in Campinas and Paulínia with support of vegetal specie Tillandsia usneoides (L.)
The epiphytic bromeliad Tillandsia usneoides (L.) was used as biomonitor of the atmosphere at seven sites along a transect of the municipalities of Campinas and Paulinia. The selected sites are located near highways, industries and avenues, as well as in places farther away from human activities. The samples of were introduced by about two months during five
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
-
12. Estudos numéricos de química atmosférica para a região do Caribe e América Central com ênfase em Cuba / Atmospheric chemistry numerical studies of Central America and the Caribbean region with emphasis on Cuba
Neste trabalho, foi aplicado o modelo CCATT-BRAMS na região da América Central e do Caribe, com foco em Cuba, com o intuito de estudar os mecanismos físicos e químicos de controle da química, na baixa troposfera nesta região, e prover ferramentas que possibilitem a continuidade deste trabalho nas condições locais. Para tanto, foi implementado o mecan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011