Key Gases
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. The role of sediments in the carbon and pollutant cycles in aquatic ecosystems
Resumo Objetivo Modificações antrópicas na paisagem estão acelerando os ciclos biogeoquímicos e promovendo desbalanços entre ecossistemas terrestres e aquáticos de maneira sem precedentes, com impactos ainda desconhecidos nos processos bióticos e abióticos. Desta forma, é crescente o interesse científico nas relações entre atividades humanas e
Acta Limnol. Bras.. Publicado em: 12/09/2019
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2. Estructura, composición florística y almacenamiento de carbono en bosques nativos del páramo de Anaime, Tolima, Colombia
Abstract Páramos have a high environmental importance due to their high plant and animal endemism, water regulation and carbon storage. In this work, the structure and composition of the tree vegetation were characterized as well as carbon storage in aboveground biomass and the potential reduction of emissions by deforestation were estimated prioritizing th
Ciênc. Florest.. Publicado em: 30/05/2019
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3. Human exposure to mercury and its hematological effects: a systematic review
O mercúrio é um metal que pode ser encontrado naturalmente no meio ambiente e através de fontes antropogênicas. É altamente tóxico para ecossistemas e seres vivos. A maior parte da exposição humana provém da ingestão de pescados contaminados, da liberação de gases da amálgama dentária ou da exposição ocupacional (p.ex.: extração de ouro). V
Cad. Saúde Pública. Publicado em: 11/02/2019
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4. Acondicionamiento del gas inhalado en pacientes con vía aérea artificial. Revisión narrativa
ABSTRACT Instrumentation of the airways in critical patients (endotracheal tube or tracheostomy cannula) prevents them from performing their function of humidify and heating the inhaled gas. In addition, the administration of cold and dry medical gases and the high flows that patients experience during invasive and non-invasive mechanical ventilation generat
Rev. bras. ter. intensiva. Publicado em: 2018-03
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5. Production of porous ceramic materialusing different sources of alumina and calcia
ABSTRACTNumerous papers and publications report the use of microporous calcium hexaluminate (CaO.6Al2O3; CA6) as a key raw material for high temperature insulating materials. This material has unique properties with respect to chemical purity and mineral composition. Another important property of CA6 is its structure, which consists of platelet-shaped crysta
Matéria (Rio J.). Publicado em: 2015-09
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6. Química Sem Fronteiras: o desafio da energia
Coal, natural gas and petroleum-based liquid fuels are still the most widely used energy sources in modern society. The current scenario contrasts with the foreseen shortage of petroleum that was spread out in the beginning of the XXI century, when the concept of "energy security" emerged as an urgent agenda to ensure a good balance between energy supply and
Quím. Nova. Publicado em: 2013
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7. Pre-corrective maintenance of power transformers: a new maintenance concept / Manutenção pré-corretiva em transformadores de potência: um novo conceito de manutenção
An important competitive edge of electric power distribution companies is their electric assets utilization management. Among them stands outs the power transformers because of its strategic importance in the energy supply to high demand areas. To minimize operational and social impacts associated to the electric energy supply interruptions these equipments
Publicado em: 2009
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8. Análise da relação entre a Lei n. 3135/2007 do Estado do Amazonas e o direito internacional à luz da doutrina antiformalista francesa
Since the 1970s, legal instruments aimed at environmental protection have been proliferating. International Environmental Law has been expanding as an answer to environmental challenges faced by mankind. Climatic changes caused by manmade greenhouse gases (GHG) emissions are probably, the greatest of such challenges, since it is directly related to the lifes
Publicado em: 2009
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9. Nutritional aspects of phenolic compounds in sheep fed with leguminous forage / "Aspectos nutricionais de compostos fenólicos em ovinos alimentados com leguminosas forrageiras"
As leguminosas constituem uma importante fonte de alimentos para os ruminantes e podem ser exploradas para pastejo direto ou, se conservadas, para fornecimento na forma de feno ou silagem. Algumas leguminosas possuem compostos fenólicos em sua composição. A caracterização química dessas as plantas possibilita melhor uso das mesmas na alimentação anim
Publicado em: 2007
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10. Study of breathing activity of wild and transfected line of insect cells through cultivations in bioreactors. / Estudo da atividade respiratória de linhagens selvagens e transfectadas de células de insetos através de cultivos em biorreatores.
Specific respiration rate (QO2) is a key parameter to understand cell metabolism and physiological state, providing useful information for process supervision and control. In this work, we cultivated different insect cells in a very controlled environment, being able to measure QO2 and critical oxygen concentration (Ccrit). Wild Spodoptera frugiperda (Sf9) a
Publicado em: 2007
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11. APPLICATION OF THE MODEL FOR SCM OF ARAGÃO TO SUPPLY CHAINS OF AN INDUSTRIAL GAS MANUFACTURER / APLICAÇÃO DO MODELO PARA SCM DE ARAGÃO NAS CADEIAS DE SUPRIMENTOS DE UM FABRICANTE DE GASES INDUSTRIAIS
The globalization of competition has forced the organizations to seek and to implement new forms to create competitive advantages. Nowadays, as competition occurs effectively between supply chains and not between isolated companies, SCM (Supply Chain Management) appears as a new frontier to be explored. Within this context, this dissertation has the objectiv
Publicado em: 2006
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12. Cell wall arabinan is essential for guard cell function
Stomatal guard cells play a key role in the ability of plants to survive on dry land, because their movements regulate the exchange of gases and water vapor between the external environment and the interior of the plant. The walls of these cells are exceptionally strong and must undergo large and reversible deformation during stomatal opening and closing. Th
National Academy of Sciences.