| Registro completo |
| Provedor de dados: |
BJM
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| País: |
Brazil
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| Título: |
Co-metabolism of DDT by the newly isolated bacterium, Pseudoxanthomonas sp. wax
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| Autores: |
Wang,Guangli
Zhang,Ji
Wang,Li
Liang,Bin
Chen,Kai
Li,Shunpeng
Jiang,Jiandong
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| Data: |
2010-06-01
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| Ano: |
2010
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| Palavras-chave: |
DDT
Co-metabolism
Bioremediation
Pseudoxanthomonas sp
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| Resumo: |
Microbial degradation of 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) is the most promising way to clean up DDT residues found in the environment. In this paper, a bacterium designated as wax, which was capable of co-metabolizing DDT with other carbon sources, was isolated from a long-term DDT-contaminated soil sample by an enrichment culture technique. The new isolate was identified as a member of the Pseudoxanthomonas sp., based on its morphological, physiological and biochemical properties, as well as by 16S rRNA gene analysis. In the presence of 100 mg l-1 glucose, the wax strain could degrade over 95% of the total DDT, at a concentration of 20 mg l-1, in 72 hours, and could degrade over 60% of the total DDT, at a concentration of 100 mg l-1, in 144 hours. The wax strain had the highest degradation efficiency among all of the documented DDT-degrading bacteria. The wax strain could efficiently degrade DDT at temperatures ranging from 20 to 37ºC, and with initial pH values ranging from 7 to 9. The bacterium could also simultaneously co-metabolize 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (DDD), 2,2-bis(p-chlorophenyl)-1,1-dichlorethylene (DDE), and other organochlorine compounds. The wax strain could also completely remove 20 mg kg-1 of DDT from both sterile and non-sterile soils in 20 days. This study demonstrates the significant potential use of Pseudoxanthomonas sp. wax for the bioremediation of DDT in the environment.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200025
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| Editor: |
Sociedade Brasileira de Microbiologia
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| Relação: |
10.1590/S1517-83822010000200025
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Microbiology v.41 n.2 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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