Light Pollution
Mostrando 1-12 de 36 artigos, teses e dissertações.
-
1. Temporal changes in biological traits of diatom communities in response to an oil spill in a subtropical river
Abstract: Diatom growth strategies, which are used as a proxy to analyze disturbances and environmental impacts, can also provide reliable information about environmental gradients. In this study, we used diatom communities and biological traits to assess the structure of epilithic diatoms after an oil spill in a large tributary of the Iguaçu River (Paraná
An. Acad. Bras. Ciênc.. Publicado em: 23/05/2019
-
2. Materiales eco-compatibles reforzados a base de almidón de mandioca para aplicaciones agronómicas
ABSTRACT Plastic mulch is used in various crops production in order to increase yield, extend growing season, weed control, increase fertilizers efficiency and improve soil conditions. However, since such plastics removal and disposal represent not only an additional cost, but also a source of environmental pollution, interest in starch-based materials as a
Matéria (Rio J.). Publicado em: 02/08/2018
-
3. Estimated evolution of total pollutant gas emissions associated with vehicle activity in the Metropolitan Region of Porto Alegre until 2030
ABSTRACT In recent years, the majority of economic sectors in Brazil have gone through processes of development and transformation. These processes have led to increases in environmental pollution of all kinds; air pollution being one of the most adverse. The Brazilian transportation sector, which heavily affects the air quality, experienced a significant in
An. Acad. Bras. Ciênc.. Publicado em: 24/07/2017
-
4. Streetlights attract a broad array of beetle species
ABSTRACT Light pollution on ecosystems is a growing concern, and knowledge about the effects of outdoor lighting on organisms is crucial to understand and mitigate impacts. Here we build up on a previous study to characterize the diversity of all beetles attracted to different commonly used streetlight set ups. We find that lights attract beetles from a broa
Rev. Bras. entomol.. Publicado em: 2017-01
-
5. Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity
The contact of diesel fuel with engine subsystems demands a good wear resistance. Lubricity is an important feature for integrity of injection system and the sulphur composites are primarily responsible for lubrication of the injector nozzle. Biodiesel is responsible for partially restoring the lubricity of diesel fuel that presents low levels of sulphur com
Mat. Res.. Publicado em: 04/07/2014
-
6. Determinação de compostos monoaromáticos voláteis provenientes de emissões de veículos leves, em estacionamentos subterrâneos. / Determination of volatile monoaromatic compounds emissions from light vehicles in underground parking lots.
This study aims to determine the contribution of evaporative emissions from light passenger vehicles to the degradation of the air quality. The main objective is to evaluate the concentrations volatile monoaromatic compounds benzene, toluene, ethylbenzene and xylenes (BTEX) indoors, in a site that represents the reality of the vehicular fleet of the Metropol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2012
-
7. The basin Imboassu in São Gonçalo (RJ) unit as enabler of environmental education in the context of planning and land management / A bacia do Rio Imboassu, no município de São Gonçalo (RJ) como unidade viabilizadora da educação ambiental no contexto do planejamento e gestão ambiental
Environmental problems are increasingly common and varying magnitudes and scales, affecting mainly the urban areas. Air pollution and water bodies, landslidesand floods are some of these adverse situations. São Gonçalo is no exception. Located in the Metropolitan Region of Rio de Janeiro, the city has exemplified with situations, especially in relation to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
-
8. Desenvolvimento de um sistema para detecção de dispersóides no ar
The amount of dust suspended in air can be harmful to human health if not complied with the limits previously established by the WHO (World Health Organisation). The air is polluted when it contains elements foreign to its natural composition: oxygen, nitrogen, noble gases and water vapor and even carbon dioxide. The most common forms of air pollution are ca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2011
-
9. Comparação analítica dos esquemas de autenticação em sistemas P2P de live streaming / Comparative analisys of authentication schemes in P2P live streaming
P2P live streaming applications have great potential for improvements in terms of popularity as well as quality. However, they are subject to pollution attacks, in which a malicious user tampers with audio/video of streams in order to trick other users. The authentication of blocks in a stream allows the detection of pollution in received content and can lea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
10. Pulmonary toxicity of chronic exposure to tobacco and biomass smoke in rats
OBJECTIVE: The objective of this study was to examine the separate and combined effects of tobacco and biomass smoke exposure on pulmonary histopathology in rats. INTRODUCTION: In addition to smoking, indoor pollution in developing countries contributes to the development of respiratory diseases. METHODS: Twenty-eight adult rats were divided into four groups
Clinics. Publicado em: 2011
-
11. Avaliação da qualidade do ar em ambientes internos: biblioteca pública / Indoor air quality investigation: public library
Over fifteen months, levels of temperature, humidity, noise, light intensity, contamination by carbon dioxide, total suspended particles (TSP) and respirable fractions (PM1, PM2.5, PM7 and PM10) were monitored at the Public Library Amadeu Amaral at São Carlos, SP. Investigation of the ventilation rate and occupancy, concentration of bioaerosols and identifi
Publicado em: 2011
-
12. Poluição veicular: Avaliação dos impactos e benefícios ambientais com a renovação da frota veicular leve na cidade de São Paulo / Vehicle pollution: Analysis of the impacts and environmental benefits concerning the replacement of light vehicles in São Paulo City
This study presents an analysis of the levels of vehicles emissions related to the pollution problems in São Paulo City. Using a methodology called bottom-up, this thesis presents a theoretical evaluation on the rates of pollutants coming out the exhaust pipe of the largest light vehicles fleet in Brazil. Issues related to daily city activities such as the
Publicado em: 2010