Clean Technologies
Mostrando 25-36 de 39 artigos, teses e dissertações.
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25. Avaliação de diferentes tratamentos termicos e condições de em balagem sobre a vida-de-prateleira do leite fluido com enfase no julgamento de defeitos de sabor. / Evaluation of different thermal treatment and package conditions about fluid milk shelf life emphasinzing the judgement off flavor defects.
Searching the improvement of quality, to please a more and more demanding customer, the industry tries to increase the shelf-life of milk using efficient and less expensive technology. As an example of these technologies, the quality of raw material, thermal treatment, temperature control in the storage and packing systems can be included. Milk life can be i
Publicado em: 2007
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26. Desenvolvimento de um protÃtipo de rastreador solar de baixo custo e sem baterias
In the last fifty years, the use of solar energy in the world has been growing considerably in its principal modalities: thermal and photovoltaic. Although there has been significant evolution of the photovoltaic technology along the last decades, the cost of the energy produced by those systems is still expensive when compared to the energy produced by conv
Publicado em: 2007
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27. Ativação de filme de hexametildisiloxano com o uso de plasma de baixa pressão e radiação UV / Activation of hexamethyldisiloxane films with low pressure plasma and UV radiation
The development of clean and efficient technologies to replace traditional methods for solid metallic or polymeric surface treatment in processes related to adhesion is a very important area of research. Plasma treatment and ultraviolet radiation are an altemative to accomplish these objectives since they generate very little residues, can be easily manipula
Publicado em: 2007
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28. Metodologia de projeto de sistema hÃbrido eÃlico/solar/diesel aplicado à Vila de Sucuriju-AmapÃ
The growing global concern with the issue of greenhouse effect gases, and the need for use of electricity in isolated regions serves as a spur to development and dissemination of technologies for decentralized generation of electricity with clean and renewable sources. This work focuses on methodologies and tools for design of hybrid energy systems and demon
Publicado em: 2007
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29. Desenvolvimento de catalisadores de ródio e cobalto para a reforma a vapor do etanol.
The development of technologies based on the use of biofuels has taken the attention of the scientific community, due to the current dependence on fossil fuels, which results in an increase of air pollution. This pollution increase is related to public health problems and climate changes. In this context, the use of fuel cells moved by hydrogen is a mean of
Publicado em: 2007
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30. Electric generation using Biomass: barriers and opportunities / A Geração de Energia Elétrica através do uso de Biomassa na Bahia: condicionantes e oportunidades
The use of biomass for power generation is currently a possibility to unify the paradigm of sustainable development as well as to bring new chances of social and economic development. In the scope of the sources of renewable energy included in the Program of Incentive for Alternative Sources of Electric Energy (PROINFA) and in the context of universalization
Publicado em: 2006
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31. Estratégia de implantação de um sistema de gestão ambiental (SGA) em unidades de transmissão de energia elétrica: o caso da subestação de Ibiúna, SP / An implementation strategy of an environmental management system on power transmission system: The case of Ibiúna substation, SP
After the 20th century there has been, from the society, a great enlargement of the awareness relates to the environment, its particularities and the consequences that environmental pollution would cause to everyone. The industries, aware of these changes, started a alter in their production concepts, trying to diminish as much as possible the production of
Publicado em: 2006
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32. Fatores inibidores do uso de técnicas ambientais nos postos de combustíveis: um estudo de caso em Natal/RN / Inhibiting factors of use of environmental techniques in the gas station: a study of the case Natal/RN
The objective of this work was to investigate the factors that inhibit the use of Environmental Techniques in the Gas Station of the city of Natal/RN. For this, a survey with the aid of a questionnaire was used like research instrument. Its used a sample for convenience, not probabilistic. For collection of the data, it was used directly application of the q
Publicado em: 2006
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33. Identification of shortfalls and establishment of a workplan for the success of the Brazilian Biodiesel Program. / Identificação dos gargalos e estabelecimento de um plano de ação para o sucesso do Programa Brasileiro do Biodiesel.
The increasing demand for the development of automotive technologies of less polluting fuel emissions, including that of alternative fuels, has been the way to foster Biodiesel technology, of non-fossil origin, derived from renewable sources, aiming at gradually substituting the use of diesel oil, in the worldwide energetic matrix. The american directive C
Publicado em: 2005
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34. Evaluation of impacts of clean technologies and cooking fuel substitution in urban households of Tanzania / Avaliação de impactos de tecnologias limpas e substituição de combustiveis para cocção em residencias urbanas na Tanzania
The objective of this study is to verify quantitatively the impacts of energy efficiency improvements and cooking fuels substitution in Dar es Salaam, Tanzania. The analysis focuses on developing countries and entails infonnation on access to cooking fuels, technologies and characteristics which defme a clean cooking energy based on the recommended efficienc
Publicado em: 2004
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35. Diretrizes de gestÃo e tecnologia para o tratamento de efluentes industriais
From the second half of the last century onwards, an enormous industrial revolution started due to the increasing demands after the World War II. The industries needed to produce more, with more quality, and in lower time, to help the rebuilding of the countries involved in the conflict. Herewith, and in view of the exponential populational increase that occ
Publicado em: 2003
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36. Desenvolvimento do precesso de reduÃÃo de Ãcido nitroso por Ãcido amino sulfÃmico. Modelagem cinÃtica associada à transferÃncia gÃs-lÃquido
The combustion of organic products, in particular, the natural gas, leads to the generation of nitrogenated oxides (NOx = NO and NO2; N2O) from both sources, the nitrogenous originated from the combustion air and nitrogenated compounds present in the fuel. NOx emissions can damage the human health and environment. They have been contributing widely to the fo
Publicado em: 2003