Rhodococcus Rhodochrous
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Avaliação da biodessulfurização de 4-metildibenzotiofeno por Rhodococus rhodochrous (NRRL B-2149)
O petróleo bruto convencional contém entre 0,04 a 5% de enxofre, e em geral óleos mais densos apresentam teores mais elevados. Embora pequena, esta fração é importante e sua presença torna-se indesejável, tanto por promover a corrosão do equipamento da refinaria, como porque parte dela persiste na composição dos derivados, que, ao serem queimados,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/02/2011
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2. Concepção e estudo de um biofiltro para tratamento de compostos orgânicos voláteis COVs
In the last decade, biological purification of gaseous waste has become an important alternative to many conventional methods of exhaust air treatment. More recently, biofiltration has proved to be an effective and inexpensive method for the treatment of air contaminated with volatile organic compounds (VOCs). A biofilter consists in a reactor packed with a
Publicado em: 2005
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3. Relationships between Colony Morphotypes and Oil Tolerance in Rhodococcus rhodochrous
A mucoidal strain of Rhodococcus rhodochrous was resistant to 10% (vol/vol) n-hexadecane, while its rough derivatives were sensitive. When the extracellular polysaccharide (EPS) produced by the mucoidal strain was added to cultures of the rough strains, the rough strains gained resistance to n-hexadecane. Thus, EPS confer tolerance to n-hexadecane in members
American Society for Microbiology.
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4. Heterologous Expression of Bacterial Epoxyalkane:Coenzyme M Transferase and Inducible Coenzyme M Biosynthesis in Xanthobacter Strain Py2 and Rhodococcus rhodochrous B276
Coenzyme M (CoM) (2-mercaptoethanesulfonic acid) biosynthesis is shown to be coordinately regulated with the expression of the enzymes of alkene and epoxide metabolism in the propylene-oxidizing bacteria Xanthobacter strain Py2 and Rhodococcus rhodochrous strain B276. These results provide the first evidence for the involvement of CoM in propylene metabolism
American Society for Microbiology.
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5. Metabolism of 2-Mercaptobenzothiazole by Rhodococcus rhodochrous
2-Mercaptobenzothiazole, which is mainly used in the rubber industry as a vulcanization accelerator, is very toxic and is considered to be recalcitrant. We show here for the first time that it can be biotransformed and partially mineralized by a pure-culture bacterial strain of Rhodococcus rhodochrous. Three metabolites, among four detected, were identified.
American Society for Microbiology.
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6. Nitrilase-Catalyzed Production of Nicotinic Acid from 3-Cyanopyridine in Rhodococcus rhodochrous J1
The nitrilase which occurs abundantly in cells of Rhodococcus rhodochrous J1 catalyzes the direct hydrolysis of 3-cyanopyridine to nicotinic acid without forming nicotinamide. By using resting cells, the reaction conditions for nicotinic acid production were optimized. Under the optimum conditions, 100% of the added 3-cyanopyridine could be converted to nico
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7. Transcriptional regulation of the Rhodococcus rhodochrous J1 nitA gene encoding a nitrilase.
The 1.4-kb downstream region from a nitrilase gene (nitA) of an actinomycete Rhodococcus rhodochrous J1, which is industrially in use, was found to be required for the isovaleronitrile-dependent induction of nitrilase synthesis in experiments using a Rhodococcus-Escherichia coli shuttle vector pK4 in a Rhodococcus strain. Sequence analysis of the 1.4-kb regi
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8. Nitrile Hydratase and Amidase from Rhodococcus rhodochrous Hydrolyze Acrylic Fibers and Granular Polyacrylonitriles
Rhodococcus rhodochrous NCIMB 11216 produced nitrile hydratase (320 nkat mg of protein−1) and amidase activity (38.4 nkat mg of protein−1) when grown on a medium containing propionitrile. These enzymes were able to hydrolyze nitrile groups of both granular polyacrylonitriles (PAN) and acrylic fibers. Nitrile groups of PAN40 (molecular mass, 40 kDa) and P
American Society for Microbiology.
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9. Characterization of the gene cluster of high-molecular-mass nitrile hydratase (H-NHase) induced by its reaction product in Rhodococcus rhodochrous J1.
The 4.6-kb region 5'-upstream from the gene encoding a cobalt-containing and amide-induced high molecular mass-nitrile hydratase (H-NHase) from Rhodococcus rhodochrous J1 was found to be required for the expression of the H-NHase gene with a host-vector system in a Rhodococcus strain. Sequence analysis has revealed that there are at least five open reading f
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10. Evidence for an Inducible Nucleotide-Dependent Acetone Carboxylase in Rhodococcus rhodochrous B276
The metabolism of acetone was investigated in the actinomycete Rhodococcus rhodochrous (formerly Nocardia corallina) B276. Suspensions of acetone- and isopropanol-grown R. rhodochrous readily metabolized acetone. In contrast, R. rhodochrous cells cultured with glucose as the carbon source lacked the ability to metabolize acetone at the onset of the assay but
American Society for Microbiology.
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11. The Modified β-Ketoadipate Pathway in Rhodococcus rhodochrous N75: Enzymology of 3-Methylmuconolactone Metabolism
Rhodococcus rhodochrous N75 is able to metabolize 4-methylcatechol via a modified β-ketoadipate pathway. This organism has been shown to activate 3-methylmuconolactone by the addition of coenzyme A (CoA) prior to hydrolysis of the butenolide ring. A lactone-CoA synthetase is induced by growth of R. rhodochrous N75 on p-toluate as a sole source of carbon. Th
American Society for Microbiology.
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12. Aerobic Mineralization of Trichloroethylene, Vinyl Chloride, and Aromatic Compounds by Rhodococcus Species
Two Rhodococcus strains which were isolated from a trichloroethylene (TCE)-degrading bacterial mixture and Rhodococcus rhodochrous ATCC 21197 mineralized vinyl chloride (VC) and TCE. Greater than 99.9% of a 1-mg/liter concentration of VC was degraded by cell suspensions. [1,2-14C]VC was degraded by cell suspensions, with the production of greater than 66% 14