Extraction Of Sand
Mostrando 13-24 de 36 artigos, teses e dissertações.
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13. DESENVOLVIMENTO DE METODOLOGIA ANALITICA POR CROMATOGRAFIA/ESPECTROMETRIA DE MASSAS PARA AVALIAÇÃO DA OCORRÊNCIA DE PERTURBADORES ENDÓCRINOS EM MANANCIAIS DE ABASTECIMENTO DA REGIÃO METROPOLITANA DE BELO HORIZONTE
Some organic molecules classified as endocrine disrupters compounds (EDC) have been found in surface waters and attracted attention from the scientific community due to their hability to tamper with the endocrine system of aquatic fauna, hence due to the potential risk they pose to human health. Among the compunds with endocrine properties, the hormones (17&
Publicado em: 2008
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14. Extração de areia e a dinâmica sedimentar no alto curso do Rio Paraná na região de Porto Rico, PR
Este estudo analisa o processo de extração de areia no canal do alto curso do rio Paraná, na seção da cidade de Porto São José no estado do Paraná, e avalia as conseqüências dessa atividade econômica para o sistema fluvial, como o seu comportamento e resposta ao processo. Foram feitas três campanhas aos pontos de extração de areia no canal do r
Publicado em: 2008
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15. Aproveitamento de resíduos da extração de micaxisto em pavimentos flexíveis / Institutional assessment and teaching practice in education Utilization of waste from the extraction of mica in flexible pavements
The recycling of materials has been strengthened as an efficient mechanism to minimise the problems caused by improper disposal of solid waste from human activities. Accordingly, the search for mechanisms able to absorb the waste from quarry, coming from the production of aggregates for construction, it becomes an important tool for mitigating externalities
Publicado em: 2008
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16. Availability and accumulation of potassium, calcium and magnesium in crops of eucalyptus in several forest sites / Disponibilidade e acúmulo de potássio, cálcio e magnésio em plantações de eucalipto em diversos sítios florestais
The knowledge of the alterations of the nutrient contents in the soil compartments, caused by the variations in the changeable and non-changeable forms over time and the relation of these nutrients with the nutrient export by the eucalyptus, may provide safe indications as to the use of soils and, therefore, of the forest sites studied and, consequently, all
Publicado em: 2008
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17. ANÃLISE DA TOLERÃNCIA Ã SALINIDADE EM PLANTAS DE SORGO, FEIJÃO-DE-CORDA E ALGODÃO / ANALYSIS OF SALINITY TOLERANCE IN SORGHUM, BEANS AND COTTON.
The objective of this paper was to evaluate ions concentration and some morphophysiological parameters associates to the salt tolerance in sorghum, cowpea, and cotton plants. Plants were cultivated in plastic pots, using 15 kg of sand soil at greenhouse conditions and subjected to three different salt concentrations (0.5; 4.0; and 8.0 dS.m-1) in irrigation w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2007
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18. Effects of timber harvest on phlebotomine sand flies (Diptera: Psychodidae) in a production forest: abundance of species on tree trunks and prevalence of trypanosomatids
The Amazon forest is being exploited for timber production. The harvest removes trees, used by sand flies as resting sites, and decreases the canopy, used as refuges by some hosts. The present study evaluated the impact of the timber harvest, the abundance of sand flies, and their trypanosomatid infection rates before and after selective logging. The study w
Memórias do Instituto Oswaldo Cruz. Publicado em: 27/07/2007
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19. Impactos da mineração de areia em planícies fluviais meândricas da bacia hidrográfica do Alto Tietê: o caso do rio Embu Guaçu, São Paulo - SP / The geomorphological knowledge about physical meandering systems and pursuits the understanding of the anthropic activities effects on the Alto Tietê: the case of the Embu-Guaçu river, in the southern sectin Sao Paulo county
This study presents the geomorphological knowledge about physical meandering systems and pursuits the understanding of the anthropic activities effects on these physical systems, so characterizing one of the main principles of a anthropogeomorphology and anthropogenic geomorphology. The main purpose of this research was the qualitative and quantitative analy
Publicado em: 2007
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20. Condicionantes geoambientais no processo histórico da ocupação territorial do município de Guarulhos, Estado de São Paulo
The objective of this study is to examine the relationship between geoenvironmental parameters and the historical processes of land use and occupation of the Guarulhos municipal area, from the 16th century until present day. The city of Guarulhos, located in the Greater São Paulo Area, holds the second largest urban population in the State of São Paulo, es
Publicado em: 2007
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21. Desenvolvimento de cerâmica vermelha utilizando rejeitos da construção civil
The Industry of the Civil Construction has been one of the sectors that most contribute to the pollution of the environment, due to the great amount of residues generated by the construction, demolition and the extraction of raw material. As a way of minimizing the environmental impacts generated by this industry, some governmental organizations have elabora
Publicado em: 2007
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22. ARTRÓPODES CAVERNÍCOLAS COM ÊNFASE EM FLEBOTOMÍNEOS (DIPTERA: PSYCHODIDAE) DO MUNICÍPIO DE PRESIDENTE FIGUEIREDO, AMAZONAS, BRASIL.
The cave fauna of the Brazilian State of Amazonas is poorly documented, publications being mainly restricted to summaries in congress reports. In this study three cavities in paleozoic sandstones formations in the municipality of Presidente Figueiredo, approximately 110 km north of the lower Rio Negro at Manaus, were sampled for arthropods. The techniques us
Publicado em: 2007
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23. Resíduos de mineração e metalurgia: efeitos poluidores em sedimentos e em espécie biomonitora - Rio Ribeira de Iguape - SP / Residues of mining and metallurgy: pollutant effect in sediments and biomonitor organism - River Ribeira de Iguape
For approximately 40 years, Ribeira de Iguape River received mining wastes (enriched in Cu, Cr, Pb, Ag and Zn) and metallurgical slags (enriched in Cu, Zn, Cr, Fe, Pb and As), produced and discharged by Plumbum S/A, a company located in Adrianópolis (Paraná). In order to verify the contribution of these residues in the river contamination and natural purif
Publicado em: 2007
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24. Sistema inteligente para detecção de vazamentos em dutos de petróleo usando transformada Wavelet e redes neurais
This work consists in the use of techniques of signals processing and artificial neural networks to identify leaks in pipes with multiphase flow. In the traditional methods of leak detection exists a great difficulty to mount a profile, that is adjusted to the found in real conditions of the oil transport. These difficult conditions go since the unevenly soi
Publicado em: 2006