Anthracene
Mostrando 13-24 de 232 artigos, teses e dissertações.
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13. Biodegradation of naphthalene and anthracene by chemo-tactically active rhizobacteria of populus deltoides
Several naphthalene and anthracene degrading bacteria were isolated from rhizosphere of Populus deltoides, which were growing in non-contaminated soil. Among these, four isolates, i.e. Kurthia sp., Micrococcus varians, Deinococcus radiodurans and Bacillus circulans utilized chrysene, benzene, toluene and xylene, in addition to anthracene and naphthalene. Kur
Brazilian Journal of Microbiology. Publicado em: 2010-12
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14. Biorremediação de um solo contaminado com antraceno sob diferentes condições físicas e químicas = Bioremediation of a soil contaminated with anthracene under different chemical and physical conditions / Bioremediation of a soil contaminated with anthracene under different chemical and physical conditions
O antraceno e os demais hidrocarbonetos aromáticos policíclicos (HAPs) podem ser removidos do solo pela biorremediação, cuja eficiência é limitada se as condições físicas e químicas não forem favoráveis à sobrevivência e à atividade dos microrganismos degradadores. O objetivo do presente estudo foi avaliar a influência do pH, da umidade e da
Publicado em: 2010
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15. Desenvolvimento e caracterização de um dosímetro de cintilação para controle de qualidade em radioterapia / Development and characteriation of a scintillation dosimeter for quality control in radiotherapy
O tratamento radioterápico é um procedimento capaz de matar células tumorais, expondo elas a doses pré-calculadas de radiação ionizante. A precisão na entrega da dose é fundamental para se obter um tratamento seguro e eficaz. Com o intuito de minimizar as incertezas referentes ao tratamento, é de extrema importância a implementação de procediment
Publicado em: 2010
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16. Desenvolvimento e validação de metodologia analítica para determinação de hidrocarbonetos policíclicos aromáticos (HPAS) em sedimentos. Avaliação da represa do Parque Pedroso, Santo André, SP / Development and validation of analytical methodology for determination of polycyclic aromatic hydrocarbons (PAHs) in sediments. Assessment of Pedroso Park Dam, Santo André, SP
The polycyclic aromatic hydrocarbons (PAHs), by being considered persistent contaminants, by their ubiquity in the environment and by the recognition of their genotoxicity, have stimulated research activities in order to determine and evaluate their sources, transport, processing, biological effects and accumulation in compartments of aquatic and terrestrial
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2009
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17. Degradation of Benzo [a] Pyrene by a novel strain Bacillus subtilis BMT4i (MTCC 9447)
Benzo [a] Pyrene (BaP) is a highly recalcitrant, polycyclic aromatic hydrocarbon (PAH) with high genotoxicity and carcinogenicity. It is formed and released into the environment due to incomplete combustion of fossil fuel and various anthropogenic activities including cigarette smoke and automobile exhausts. The aim of present study is to isolate bacteria wh
Brazilian Journal of Microbiology. Publicado em: 2009-12
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18. Hidrocarbonetos policíclicos aromáticos (HPAS) em cachaça, rum, uísque e álcool combustível
The concentration of 15 polycyclic aromatic hydrocarbons (PAHs) in 57 samples of distillates (cachaça, rum, whiskey, and alcohol fuel) has been determined by HPLC-Fluorescence detection. The quantitative analytical profile of PAHs treated by Partial Least Square - Discriminant Analysis (PLS-DA) provided a good classification of the studied spirits based on
Química Nova. Publicado em: 2009
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19. Caracterização de enzimas bacterianas de degradação de hidrocarbonetos aromáticos policíclicos / Characterization of bacterial enzymes of aromatic polycyclic hydrocarbons degradation
The polycyclic aromatical hydrocarbons (HAPs) are mutagenic and carcinogenic composites to the human beings and the animals that are introduced in the environment in great amounts, to its activities related to the extraction, the transport, the refining, the transformation and the use of the oil and of its derivatives. The enzyme use for the biodegradation H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2008
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20. Synthesis and characterization of Al- and Ti-MCM-41 materials: application to oxidation of anthracene
The synthesis and characterization of new molecular sieves of the MCM-41 type are presented in this study. Samples were obtained from the alkoxides of Si, Ti and Al and different long-chain amine and alkylammonium salts surfactants, by the sol-gel method, through moderate agitation at room temperature. The reactions were conducted in two steps, acid hydrolys
Brazilian Journal of Chemical Engineering. Publicado em: 2007-03
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21. Rhizospheric microorganisms and arbuscular mycorrhiza in soil from a petrochemical waste landfarming system. / Microbiota RizosfÃrica e Micorriza Arbuscular em Solo de "Landfarming" de ResÃduos PetroquÃmicos.
In the petroleum industrialization a great volume of different toxic residues is generated. Because of these waste environmental hazards they need to be adequately treated before final disposition in the environment. These wastes are usually treated by landfarming systems, but this technique has only relative success, since it doesn t completely remove all c
Publicado em: 2007
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22. Hidrocarbonetos policíclicos aromáticos no meio ambiente: diferenciação de fontes em sedimentos e metabólitos em bile de peixes
Many studies on environmental ecosystems quality related to polycyclic aromatic hydrocarbons (PAH) have been carried out routinely due to their ubiquotus presence worldwide and to their potential toxicity after its biotransformation. PAH may be introduced into the environmet by natural and anthropogenic processes from direct runoff and discharges and indirec
Publicado em: 2007
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23. DESENVOLVIMENTO E VALIDAÇÃO DE MÉTODO FOSFORIMÉTRICO EM SUBSTRATO DE CELULOSE PARA DETERMINAÇÃO DE PIRENO E CRISENO / DEVELOPMENT AND VALIDATION OF THE PHOSPHORIMETRIC METHOD IN CELLULOSE SUBSTRATE TO DETERMINATION OF PYRENE AND CHRYSENE
In this work, solid surface room-temperature phosphorimetry (SSRTP) was used to develop ultra-trace and selective methods for determination of chrysene and pyrene in complex samples containing several other polycyclic aromatic hydrocarbons (PAHs). Both chrysene and pyrene were selected because they are classificated by the U.S. Environmental Protection Agenc
Publicado em: 2007
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24. Aspectos químicos, biológicos e etnofarmacológicos do gênero Cassia
Species of Cassia are widely distributed in tropical and subtropical regions throughout the world, and have been extensively investigated chemically and pharmacologically.They are known to be a rich source of phenolic derivatives, most of them with important biological and pharmacological properties. Some Asian, African and Indian tribes use these species as
Química Nova. Publicado em: 2006-12