319 resultados para impostos ambientais e subsídios
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em História - FCLAS
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This graduation work done study of polyamide 6.6/composite carbon fibres, since its processing, characterization of the main properties. Besides the influence of temperature, UV radiation, salt spray and moisture on the mechanical and viscoelastic behavior. To achieve this goal, the first composite was processed from the heat compression molding using known variables of the process and using the empirical method to find the best value for other parameters. The method processing molding was chosen because it common in composites processing in order to evaluate the influence of crystallinity of the properties that influence the mechanical and viscoelastic behavior laminates. From the obtained laminate specimens were evaluated in weathering, such as: in hygrothermal chamber, UV, salt spray and thermal shock. In another step, the effect produced by these constraints were evaluated by optical microscopy, ultrasound, dynamic mechanical analysis and vibration tests. This project was conducted at the Department of Technology and Materials of UNESP in Guaratingueta, where all the equipment and techniques for the implementation of this project met available. After the tests proved the applicability of the composite polyamide 6.6/carbon fibers in aeronautical applications with resistance the main climatic influences
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Indiscriminate and inappropriate use of pesticides in agriculture has been pointed out for increasing health problems and environmental damage. Considering that water resources are the principal destiny of those compounds after application, the present study presents optimization and validation of two simple and effi cient analytical methods for pesticides quantifi cation in both surface and groundwater. Were selected the pesticides more commonly used at Dourados (MS - Brazil), region with intense agricultural activity. Pesticides were preconcentrated by solid-phase extraction using C18 (500 mg) cartridges and then divided in two groups for elution and quantifi cation: 2.4-D and 2.4-DCP were eluted with methanol and quantifi ed by high performance liquid chromatography with ultra-violet detector (HPLC-UV) while atrazine, DIA, DEA, trifl uralin and methyl parathion were eluted with ethylacetate (1:1, v/v) and quantifi ed by gas chromatography with thermionic specifi c detector (GC-TSD). The methods showed satisfactory accuracy (76-107%) and precision (<12%) for the substances analyzed at the fortifi ed levels selected for the study, except for DIA (<51%). Study of pesticide stability also presented good results: C18 cartridges could be stored for at least for 21 days at -20ºC with no signs of the compounds degradability. Both methods limits of quantifi cation of the pesticides (0.22 - 0.48 μg L-1) are in accordance to the levels currently established by the Brazilian national legislation for pesticides in water. Although only the pesticide 2.4-D has been detected in two distinct collection points in the study period of time, this work warns for the requirement of systematical analysis of pesticides presence in water destined to human consume, principally in areas of intense agriculture activity. Such monitoring can provide subsidies for public environmental policies.
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Pós-graduação em Educação - FFC
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Pós-graduação em Geografia - FCT
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Pós-graduação em Educação Escolar - FCLAR
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Geociências e Meio Ambiente - IGCE
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Pós-graduação em Engenharia Civil - FEIS
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Pós-graduação em Engenharia Civil - FEIS
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Pós-graduação em Química - IQ
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Considerando número expressivo de alunos matriculados nas diferentes etapas e modalidades de ensino no Brasil e o que estabelece a Constituição Federal de 1988, sobre a incumbência do Poder Público de promover a Educação Ambiental em todos os níveis de escolarização, pretendemos analisar, neste artigo, aspectos referentes aos marcos legais e às orientações pedagógicas da Educação Ambiental em nosso país. Tomamos como referência a perspectiva de alguns autores brasileiros que estudam o tema e analisamos as principais diretrizes legais da Educação Ambiental no Brasil e as recomendações dos Parâmetros Curriculares Nacionais referentes a Meio Ambiente. Diante dos sérios problemas ambientais que enfrentamos, acreditamos que a Educação Ambiental pode contribuir para transformações nos indivíduos e na sociedade. Defendemos, também, a importância da pesquisa em Educação Ambiental e consideramos que o conhecimento gerado pela pesquisa pode oferecer subsídios para ações que promovam mudanças capazes de garantir um planeta ambientalmente seguro e saudável.
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At the beginning of the 21st century, several crises are intertwined and the environmental crisis is the most global of them all. For a complex and global crisis, which has implications of a social, economic, technological nature, etc., solutions will probably not come from a single source, but rather the sum of efforts of society as a whole (including all its instances, government, business, population, etc.). The objective of this review was to discuss the need to produce “environmental” professionals who, through their activities, are in some way involved with the quality of the environment. We believe that, ultimately, it is the quality of the environment that will ensure the quality of life in a fairer society. Thinking about the training of teachers, as environmental educators in undergraduate (bachelor) universities, means having as a reference the idea of wholeness (environmental, political, educational, social, scientific, etc.) in the diversity that these areas possess. Even though there are many difficulties involved in getting this topic included in the university structure, based on a complex approach, we believe this is one of the best paths toward environmental training.