Pentachlorophenol
Mostrando 13-24 de 121 artigos, teses e dissertações.
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13. Investigação sobre a diversidade microbiana e a filogenia de arquéias e bactérias em consórcios anaeróbios metanogênicos, originados de sedimentos estuarinos enriquecidos com clorofenóis / Investigation on the microbial diversity and phylogeny of archaea and bacteria in anaerobic methanogenic consortium from enriched estuarine sediments with pentachlorophenol (PCP) and 2,6-dichlorophenol (2,6-DCP)
Este trabalho investigou a diversidade microbiana e a filogenia de arquéias e bactérias em consórcios anaeróbios metanogênicos, originados de sedimentos estuarinos enriquecidos com pentaclorofenol (PCP) e 2,6-diclorofenol (2,6-DCP). Para tanto foram construídas bibliotecas genômicas e utilizados métodos moleculares independentes de cultivo como a Ele
Publicado em: 2007
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14. Assessment of the ability of sludge to degrade PCP under anaerobic conditions
The capacity of sludge from different sources to degrade pentachlorophenol (PCP) was evaluated. Three 2.5 liter reactors (R1, R2, and R3) were inoculated with different anaerobic sludges, semi continuously fed and maintained in orbital motion at 30±1°C. R1 was inoculated with aerobic sludge and river sediment collected downstream from a pulp and paper plan
Brazilian Journal of Chemical Engineering. Publicado em: 2005-12
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15. Anaerobic treatment of effluent cointaining pentachlorophenol in a fluidized bed reactor / Tratamento anaeróbio de efluente contendo pentaclorofenol em reator de leito fluidificado
Remoções quase totais de clorofenóis, por processos anaeróbios, já foram atingidas mediante elevada concentração de matéria orgânica e um número considerável de fontes de carbono. Porém, é necessário que se investigue o desempenho dos reatores submetidos a condições menos idealizadas. Este trabalho apresenta o desenvolvimento de uma metodolog
Publicado em: 2005
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16. Contribution to technological research of the microbial studies done at program BIOTA FAPESP: evaluation of anaerobic Pentachlorophenol (PCP) biodegradation in a horizontal-flow anaerobic immobilized biomass (HAIB) reactor / Contribuição à exploração tecnológica dos estudos microbianos realizados no programa BIOTA FAPESP: avaliação do potencial da degradação anaeróbia de pentaclorofenol (PCP) em reator anaeróbio horizontal de leito fixo (RAHLF)
O estudo que ora se apresenta integrou o conjunto de pesquisas do sub-projeto - Diversidade de Bactérias Associadas à Degradação de Compostos Recalcitrantes, do projeto temático BIOTA FAPESP - Ecologia Molecular e Taxonomia Polifásica de Bactérias de Interesse Ambiental e Agro-Industrial. Apresenta caráter inovador, na medida em que procurou avaliar
Publicado em: 2005
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17. Tratamento de residuos organoclorados toxicos : avaliação das condições experimentais para a hidrodescloração do pentaclorofenol com catalisadores de paladio
Concerns with environmental pollution have changed most intensively since Industrial Revolution. At the beginning, environmental pollution was faced as a simple effect of the progress of humanity, but lately, it has been considered a terrible global problem. Nowadays, severe legislation for environmental pollution control has given rise to a great variety of
Publicado em: 2004
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18. Durability of preservative treated Pinus lumber: evaluation through field stake test. / Durabilidade da madeira do gênero Pinus tratada com preservantes: avaliação em campo de apodrecimento.
When used in ground contact, wood is deteriorated by biological agents, as root fungi and subterranean termites. A way to increase the use of wood species of low natural durability, as the Pinus lumber, is the preservative treatment. However, there is a lack of information indicating the durability of treated wood. In order to determine the durability of pre
Publicado em: 2002
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19. Exposição ocupacional e organoclorados em industria quimica de Cubatão - Estado de São Paulo : avaliação do efeito clastogenico pelo teste de Micronucleos
A study of occupational exposure to organochiorinated substances was initially carried out at chemical unity of Cubatão (Unidade Química de Cubatão-UQC). This industry operated from 1967 to 1993, producing carbon tetrachloride as well as perchlroethylene It is known that the residual waste of these agents is the hexachlorobenzene. Until 1976, this industr
Publicado em: 1995
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20. Reductive dechlorination of chlorophenols by a pentachlorophenol- acclimated methanogenic consortium.
Anaerobic digester sludge fed 5,300 mg of acetate per liter, 3.4 microM pentachlorophenol, and nutrients for 10 days biotransformed pentachlorophenol by sequential ortho dechlorinations to produce 2,3,4,5-tetrachlorophenol and 3,4,5-trichlorophenol. Upon acclimation to 3.4 microM pentachlorophenol for 6 months, the methanogenic consortium removed chlorines f
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21. Effects of pentachlorophenol and some of its known and possible metabolites on different species of bacteria.
The antibacterial activity of pentachlorophenol and 35 of its known or possible metabolites against 30 different species of bacteria was tested. In comparison with pentachlorophenol, no increase of inhibitory activity was found for any of the chlorinated anisoles tested (except for pentachloroanisole against Streptomyces spp.), 2-chlorophenol, 2,6-dichloroph
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22. Confirmation of oxidative dehalogenation of pentachlorophenol by a Flavobacterium pentachlorophenol hydroxylase.
Pentachlorophenol (PCP) hydroxylase purified from Flavobacterium sp. strain ATCC 39723 converted PCP or 2,3,5,6-tetrachlorophenol to tetrachloro-p-hydroquinone (TeCH) with the co-consumption of O2 and NADPH. The purified enzyme incorporated 18O from 18O2 but not from H218O into the reaction end product TeCH. The results clearly demonstrate that PCP is oxidat
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23. Kinetics of microbial growth on pentachlorophenol.
Batch and fed-batch experiments were conducted to examine the kinetics of pentachlorophenol utilization by an enrichment culture of pentachlorophenol-degrading bacteria. The Haldane modification of the Monod equation was found to describe the relationship between the specific growth rate and substrate concentration. Analysis of the kinetic parameters indicat
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24. Metabolism of Pentachlorophenol by an Axenic Bacterial Culture
A bacterial isolate obtained from a continuous-flow enrichment culture has been shown to metabolize pentachlorophenol as a sole source of organic carbon and energy.