Growth ofRhodococcus opacus on mixtures of monohalogenated benzenes and phenols

Zaitsev, Gennadi; Surovtseva, E. G.

doi:10.1007/bf02756763

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…No transformation was observed for 4-BP. The growth of the bacterium Rhodococcus opacus on mixtures of 2-BP (0.3 mmol/litre) and 2-chlorophenol (0.3 mmol/litre) and on mixtures of 4-BP (0.28 mmol/litre), 4-chlorophenol (0.25 mmol/litre), and 4-iodophenol (0.25 mmol/litre) was accompanied by the consumption of the substrates and the excretion of halogen ions into the medium within 30 h and 35 h, respectively (Zaitsev & Surovtseva, 2000).…”

Section: Transformationmentioning

confidence: 98%

Air–Water Exchange of Brominated Anisoles in the Northern Baltic Sea

Bidleman

Agosta²,

Andersson

et al. 2014

Environ. Sci. Technol.

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Bromophenols produced by marine algae undergo O-methylation to form bromoanisoles (BAs), which are exchanged between water and air. BAs were determined in surface water of the northern Baltic Sea (Gulf of Bothnia, consisting of Bothnian Bay and Bothnian Sea) during 2011-2013 and on a transect of the entire Baltic in September 2013. The abundance decreased in the following order: 2,4,6-tribromoanisole (2,4,6-TBA)>2,4-dibromoanisole (2,4-DBA)≫2,6-dibromoanisole (2,6-DBA). Concentrations of 2,4-DBA and 2,4,6-TBA in September were higher in the southern than in the northern Baltic and correlated well with the higher salinity in the south. This suggests south-to-north advection and dilution with fresh riverine water enroute, and/or lower production in the north. The abundance in air over the northern Baltic also decreased in the following order: 2,4,6-TBA>2,4-DBA. However, 2,6-DBA was estimated as a lower limit due to breakthrough from polyurethane foam traps used for sampling. Water/air fugacity ratios ranged from 3.4 to 7.6 for 2,4-DBA and from 18 to 94 for 2,4,6-TBA, indicating net volatilization. Flux estimates using the two-film model suggested that volatilization removes 980-1360 kg of total BAs from Bothnian Bay (38000 km2) between May and September. The release of bromine from outgassing of BAs could be up to 4-6% of bromine fluxes from previously reported volatilization of bromomethanes and bromochloromethanes.

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Section: Transformationmentioning

confidence: 98%

Air–Water Exchange of Brominated Anisoles in the Northern Baltic Sea

Bidleman

Agosta²,

Andersson

et al. 2014

Environ. Sci. Technol.

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Mineralization and transformation of monofluorophenols by Pseudonocardia benzenivorans

Kim

Jeon

Kim

et al. 2010

Appl Microbiol Biotechnol

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The aerobic metabolism of monofluorophenols (mono-FPs) by the actinomycete, Pseudonocardia benzenivorans, was studied. This strain was able to grow on 4-fluorophenol (4-FP) and readily transform 2- and 3-fluorophenol to the corresponding metabolites. The detailed mechanism of mono-FPs degradation by P. benzenivorans was elucidated from enzymatic assays and the identification of reaction intermediates by high-performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry. Two types of fluorocatechols (i.e., 3- and 4-fluorocatechol) were identified as the key transformation products. During 4-FP degradation, only 4-fluorocatechol was detected, and a stoichiometric level of fluoride was released. Both fluorocatechols were observed together in cultures containing 3-fluorophenol (3-FP), while only 3-fluorocatechol was found to accumulate in 2-fluorophenol (2-FP)-containing cultures. Whole-cell extracts of P. benzenivorans expressed catechol 1,2-dioxygenase activity, indicating that the transformation of the three tested mono-FPs proceeded via ortho-cleavage pathway. The results presented in this paper provide comprehensive information regarding the metabolism of mono-FPs by a single bacterium.

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Growth ofRhodococcus opacus on mixtures of monohalogenated benzenes and phenols

Cited by 2 publications

References 11 publications

Air–Water Exchange of Brominated Anisoles in the Northern Baltic Sea

Air–Water Exchange of Brominated Anisoles in the Northern Baltic Sea

Mineralization and transformation of monofluorophenols by Pseudonocardia benzenivorans

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