Contaminations
Mostrando 13-24 de 77 artigos, teses e dissertações.
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13. Selectivity of the plant growth regulators trinexapac-ethyl and sulfometuron-methyl to cultivated species
The aerial spraying of plant ripeners on sugar cane (Saccharum officinarum L.) crops causes often the contamination of neighboring areas, which subsidizes formal complaints from the neighbors. These contaminations are due to spraying taking place during inadequate environmental conditions or from technical mistakes during the application. One of the most imp
Scientia Agricola. Publicado em: 2012-06
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14. Comparative studies of WC-Co and WC-Co-Ni composites obtained by conventional powder metallurgy
The present work reports a comparative study of cemented carbides of compositions WC-6Co, WC-10Co, WC-20Co, WC-6Co-6Ni and WC-12Ni-6Co. The purpose was to study the powder metallurgical production process of these compositions starting from a commercial WC-6Co powder, obtaining the desired compositions by mass balance with pure Co and pure Ni powders. During
Materials Research. Publicado em: 03/06/2011
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15. The use of ozonized oil in the treatment of dermatophitosis caused by Microsporum canis in rabbits
The ozone is effective against most microorganisms due to its high oxidant power. Low concentrations and short-term contact are sufficient to inactivate bacteria, mold, yeast, parasites, seaweeds, protozoa and fungi. Microsporum canis is an important agent of dermatophitosis in human and animal. The aim of the current study was to assess the efficacy of ozon
Brazilian Journal of Microbiology. Publicado em: 2011-03
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16. Percolação de poluentes em solos após aplicação de resíduos de fábrica de papel reciclado.
O estudo dos efeitos da aplicação de resíduos de fábrica de papel reciclado na água percolada pelo solo foi o objetivo deste trabalho. A aplicação de resíduos de fábricas de papel em solos tem sido crescente e despertado a atenção pela possibilidade de contaminação do meio ambiente, principalmente pela poluição das águas. Com o uso de resídu
Floresta. Publicado em: 2011
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17. Avaliação do desempenho de surfactantes para a solubilização de fases líquidas não aquosas em meio aquoso
The presence of non-aqueous phase liquids (NAPLs) in the subsurface is a threat to public health as well as a serious environmental issue. NAPLs may remain adsorbed or form lenses floating on aquifers causing long-term contaminations. Surfactants may increase NAPLs solubility, enhancing the pump-and-treatment performance. Size, shape, hydration and ionizatio
Química Nova. Publicado em: 2010
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18. Estudo do comportamento mecânico de dutos de aço com reparos compósitos hibridos / Mechanical behavior of steel pipes repaired with a hybrid laminate
Worldwide, steel pipes play an important role in many industrial sectors. Meanwhile, any kind of duct is prone to suffer superficial damages due to corrosion. In this sense, techniques which allow fast and reliable repairs of ducts have a fundamental importance to increase the life cycle, avoid accidents, minimize environmental contaminations and to keep the
Publicado em: 2010
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19. Qualidade da água potável consumida na Cidade do Salvador - Bahia
The research talks about the drinking water which is consumed in Salvador city and presents the main health consequences of the contaminants that can be found in the water and the prevention measurements more suitable to remove them. Contaminations which can be found in the water sources come from the growth industrial activities, synthetic agriculture compo
Publicado em: 2010
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20. Estudo das contaminações provenientes do processo de cominuição de amostras geológicas / A study of contaminations derived from comminution processes of geologic samples
A cominuição de amostras geológicas envolve etapas para reduzir seus grãos garantindo sua representatividade, com o auxílio de vários equipamentos de moagem de amostras. São duas as contaminações que podem ser causadas durante o uso desses equipamentos. A primeira é a contaminação primária, pelo contato face a face entre a amostra e os component
Publicado em: 2010
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21. Pre-processing for noise detection in gene expression classification data
Due to the imprecise nature of biological experiments, biological data is often characterized by the presence of redundant and noisy data. This may be due to errors that occurred during data collection, such as contaminations in laboratorial samples. It is the case of gene expression data, where the equipments and tools currently used frequently produce nois
Journal of the Brazilian Computer Society. Publicado em: 2009-03
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22. Flow-batch analyser for preparation of calibration standard mixtures in simultaneous multicomponent spectrometric analysis
The application of multivariate calibration techniques to multicomponent analysis by UV-VIS molecular absorption spectrometry is a powerful tool for simultaneous determination of several chemical species. However, when this methodology is accomplished manually, it is slow and laborious, consumes high amounts of reagents and samples, is susceptible to contami
Eclética Química. Publicado em: 2009
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23. Determinação de resíduos dos pesticidas pirimetanil, pirimicarbe e buprofezina em águas ambientais por SPME e GCMS
The aim of the work was to develop method for determining pyrimethanil, pirimicarb and buprofezin residues in environmental water using solid-phase microextraction and gas chromatography-mass spectrometry. To perform the SPME, a 100 μm polydimethylsiloxane (PDMS) fiber was used for the extraction of the pesticides from water samples. Using univariate op
Publicado em: 2009
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24. A poética do construir: a arquitetura da construção
Taking as starting point the extreme dismemberment of the architectural making, we made the proposal of approaching the project to its constructive process, not for the requirement of the architects presence on the jobsite but as a return to the materiality of the architecture and the poetic of the construction. With this intention we present the concepts of
Publicado em: 2009