Organochlorine
Mostrando 25-36 de 65 artigos, teses e dissertações.
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25. Ocorrência de PCBs, PBDEs e pesticidas organiclorados em Prionace glauca da costa sul brasileira / Ocurrence of PCBs, PBDEs and organochlorine pesticides in Prionace glauca from Braziliam south coast
There are many studies about the occurrence of persistent organic pollutants (POPs) in the marine environment using sharks as bioindicators. However, there is still a lack of data of POPs in those organisms in Brazil. The goal of this research was to investigate the occurrence and behavior of PCBs, organochlorine pesticides and PBDEs in the marine environmen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2009
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26. DESENVOLVIMENTO DE MÉTODO MULTIRESIDUAL PARA ANÁLISE DE PESTICIDAS EM MEL, UTILIZANDO CROMATOGRAFIA A LÍQUÍDO COM DETECTOR ESPECTROFOTOMÉTRICO COM ARRANJO DE DIODOS / MULTIRESIDUAL METHOD DEVELOPMENT TO ANALYSIS OF PESTICIDES IN HONEY, USING LIQUID CHROMATOGRAPHY WITH SPECTROPHOTOMETRIC DETECTOR WITH ARRANGEMENT OF DIODES
Honey is a product of proven therapeutic and nutritional properties, and which may act as an excellent bioindicator, given the way the bees gather and process the raw material used in its preparation. The monitoring of pesticide residues in honey is important both to control product quality in domestic and international markets, and in assessing the potentia
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/01/2009
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27. Ocorrência de Pesticidas Organoclorados e Bifenilos Policlorados em tartarugas marinhas Chelonia mydas / Occurrence of organochlorine pesticides and polychlorinated biphenyls in sea turtles Chelonia mydas
Organochlorine compounds, such as pesticides and polychlorinated biphenyls (PCBs), are persistent, toxics and widely distributed due to the atmospheric transport and oceanic currents. Few studies have reported the occurrence of these compounds in turtles, but none from the Brazilian Coast. Chelonia mydas is the biggest marine turtle with hard carapace that e
Publicado em: 2009
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28. Desenvolvimento e aplicação de técnicas miniaturizadas de preparo de amostras para análises ambientais via GC-MS / Development and application of miniaturized sample preparation techniques for environmental analysis via GC-MS
This study describes the development and application of different miniaturized sample preparation techniques for environmental analysis via gas chromatography and mass spectrometry (GC-MS). Among those techniques, the Solid Phase Extraction (SPE) was applied to the analysis of plant growth regulator, called paclobutrazol (PBZ), in soil samples. A method was
Publicado em: 2009
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29. Determinação de resíduos de agrotóxicos em mel de abelhas (Apis sp.) por cromatografia gasosa acoplada à espectrometria de massas
Among the problems concerning the quality of honey, are the physical and chemical characteristics, the identification of the floral and geographical origin, the occurrence of adulteration and contamination, especially with antibiotics and pesticides. The adequacy of these features to existing laws in the country makes the product more competitive for the exp
Publicado em: 2009
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30. Organochlorine pesticides in Piracicaba river basin (São Paulo/Brazil): a survey of sediment, bivalve and fish
The main objective of this paper was to evaluate the level of occurrence of the organochlorine compounds in samples of sediments, bivalves and two fish species collected in the Piracicaba River basin (São Paulo, Brazil). The isomers alpha and gamma of HCH and Heptachlor were most frequently detected in samples of sediments and specimens of bivalve and fish.
Química Nova. Publicado em: 2008
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31. Organochlorines in Franciscana dolphins, Pontoporia blainvillei (MAMMALIA: CETACEA) from the coast off São Paulo State, Brazil / Organoclorados em Toninhas, Pontoporia blainvillei (MAMMALIA: CETACEA) da região costeira do Estado de São Paulo, Brasil
Organochlorines are one of the main pollutant groups that affect the ecosystems due to their environmental persistence and toxicity to the organisms. Franciscana dolphin, Pontoporia blainvillei, is a coastal cetacean, the only Brazilian dolphin considered threatened with extinction, due to the human activities. The aim of this work was evaluate the occurrenc
Publicado em: 2008
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32. Determination of organochlorine compounds and polycyclic aromatic hidrocarbons in Lagoa de Carapicuiba- SP / Determinação de compostos organoclorados e hidrocarbonetos poliaromáticos na Lagoa de Carapicuíba - SP
In 2002, started the workmanships of widening and deepening of the gutter of the river Tietê in the metropolitan area of Sao Paulo, as a tool to prevent the periodic floods that happen in this region. A large amount of sediment, rocks and garbage have been removed from the river and this same material has been deposited in the lagoa de Carapicuíba, which s
Publicado em: 2007
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33. DETERMINAÇÃO DE RESÍDUOS DE AGROTÓXICOS ORGANOCLORADOS EM LARANJA POR DISPERSÃO DE MATRIZ EM FASE SÓLIDA (MSPD) DISSERTAÇÃO DE MESTRADO ECOLOGIA E PRODUÇÃO SUSTENTÁVEL
This work shows the results achieved for the evaluation of organochlorine pesticides residue presence in oranges consumed in Goiânia. The method employed was based on the Matrix Solid Phase Dispersion extraction, MSPD, and analyzed by high resolution gas chromatography, GC. The studied pesticides were hexachlorobenzene, atrazine, heptachlor and its epoxide,
Publicado em: 2007
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34. Ocorrência de compostos organoclorados em Euphausia superba e em ovos gorados de pingüins do gênero Pygoscelis / Occurrence of organochlorine compounds in Euphasia superba and uhatched eggs of Pygoscelis genus penguins
Polychlorinated biphenyls (PCBs) and organochlorine pesticides are compounds that do not occur naturally in the environment and are not easily degraded by chemical or microbiological action. Their study in the environment is important due to persistence, toxicity, liposolubility and consequent biomagnification. For these reasons, they represent the majority
Publicado em: 2007
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35. Tratamento de água subterrânea contaminada com compostos organoclorados usando ferro elementar e o reagente de Fenton
The remediation of groundwater containing organochlorine compounds was evaluated using a reductive system with zero-valent iron, and the reductive process coupled with Fenton's reagent. The concentration of the individual target compounds reached up to 400 mg L-1 in the sample. Marked reductions in the chlorinated compounds were observed in the reductive pro
Química Nova. Publicado em: 2007
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36. GC-MS determination of organochlorine pesticides in medicinal plants harvested in Brazil
Neste trabalho foi desenvolvido um método para a determinação de hexaclorobenzeno, lindano, heptaclor, heptaclor epóxido, aldrin, dieldrin, endrin, DDT e DDE em folhas de Mikania laevigata, Maytenus ilicifolia e Cordia verbenacea, empregando a Cromatografia Gasosa acoplada a Espectrometria de Massas (GC-MS). A extração dos pesticidas foi realizada por
Journal of the Brazilian Chemical Society. Publicado em: 2007