Studies of the global baseline pollution XIII

Wittlinger, R; Ballschmiter, Karlheinz

doi:10.1007/bf00332252

Cited by 50 publications

(16 citation statements)

References 27 publications

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“…PCP methylation was the major source of PCA in environments [57]. P450-mediated demethylations of some chloroanisoles have been reported in animals [58], and a O-demethylation of TCA catalyzed by a microsomal P450 to produce 2,4,6-trichlorophenol has been found in a white rot fungus Phlebia radiate recently [56].…”

Section: Discussionmentioning

confidence: 99%

Involvement of Cytochrome P450 in Pentachlorophenol Transformation in a White Rot Fungus Phanerochaete chrysosporium

Ning

Wang

2012

PLoS ONE

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The occurrence of cytochrome P450 and P450-mediated pentachlorophenol oxidation in a white rot fungus Phanerochaete chrysosporium was demonstrated in this study. The carbon monoxide difference spectra indicated induction of P450 (103±13 pmol P450 per mg protein in the microsomal fraction) by pentachlorophenol. The pentachlorophenol oxidation by the microsomal P450 was NADPH-dependent at a rate of 19.0±1.2 pmol min−1 (mg protein)−1, which led to formation of tetrachlorohydroquinone and was significantly inhibited by piperonyl butoxide (a P450 inhibitor). Tetrachlorohydroquinone was also found in the cultures, while the extracellular ligninases which were reported to be involved in tetrachlorohydroquinone formation were undetectable. The formation of tetrachlorohydroquinone was not detectable in the cultures added with either piperonyl butoxide or cycloheximide (an inhibitor of de novo protein synthesis). These results revealed the pentachlorophenol oxidation by induced P450 in the fungus, and it should be the first time that P450-mediated pentachlorophenol oxidation was demonstrated in a microorganism. Furthermore, the addition of the P450 inhibitor to the cultures led to obvious increase of pentachlorophenol, suggesting that the relationship between P450 and pentachlorophenol methylation is worthy of further research.

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Section: Discussionmentioning

confidence: 99%

Involvement of Cytochrome P450 in Pentachlorophenol Transformation in a White Rot Fungus Phanerochaete chrysosporium

Ning

Wang

2012

PLoS ONE

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“…Like the halogenated anisoles, chlorobenzenes are ubiquitous in the environment yet unsolved problems in sampling and sample clean-up have restricted the global monitoring of these relatively volatile compounds. Hexachlorobenzene (HCB) has been found in the atmosphere [8,23] and in several biological samples, e.g. in leaves [24] and in marine mammals at the top of the marine food chain [4,25,26].…”

Section: Introductionmentioning

confidence: 99%

“…Several of the 134 congeners of the bromo-, chloro-and bromochloromethoxybenzenes (hereafter denoted bromo-chloro-anisoles), which consist of 19 chloroanisoles, 19 bromoanisoles and 96 mixed bromochloroanisoles, have been detected in marine [1] and fresh-water [2][3][4] fish, in oysters [5], in the effluents [6] and atmospheres [7] of municipal waste water biological treatment plants, and in marine air [8,9]. Despite the ubiquity of the bromo-chloro-anisoles in the environment, their main sources are not yet known.…”

Section: Introductionmentioning

confidence: 99%

Analysis of halogenated methoxybenzenes and hexachlorobenzene (HCB) in the picogram m−3 range in marine air

et al. 1997

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SummaryHalogenated methoxybenzenes (halogenated anisoles) and hexachlorobenzene (HCB) have been analyzed in marine air samples from the lower troposphere of the East Atlantic Ocean, taken on the German research vessel "Polarstern' during two cruises in 1993 and 1994, and in air samples from the North Pacific Ocean (1995). The high-volume sampling method, sample preparation and analysis by HRGC-ECD and HRGC-MSD-SIM are described. The effectiveness of a new graphitized-carboncovered silica sorbent (ANGI-Sorb B) for the sampling of semi-volatiles is demonstrated. Eight congeners of the halogenated anisoles and HCB were detected in almost all marine air samples. The concentrations of the chloroanisoles, which show a distinct north-south interhemispherical gradient, were between 0.2 and 145 pg m-3; for the bromoanisoles concentrations were between 0.2 and 42 pg m -3. Only a weak inter-hemispheric gradient was observed for HCB at levels of 10--40 pg m -3. Levels of HCB were approximately 100 pg m -3 in continentally influenced air. Biogenic and indirect anthropogenic sources of the halogenated anisoles are discussed.

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“…substances, such as chlorinated hydrocarbons. Concentrations in air have been measured and attempts have been made to evaluate the role of the atmosphere in world transport and contamination of remote areas (1)(2)(3).…”

Section: Introductionmentioning

confidence: 99%

Role of plant biomass in the global environmental partitioning of chlorinated hydrocarbons

Calamari¹,

Bacci²,

Focardi³

et al. 1991

Environ. Sci. Technol.

280

161

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PCDD/F formation on fly ashes, the effect of inhibitors was studied by this technique. While no inhibitory action was observed for triethylamine, ethanolamine was shown to act as a very efficient inhibitor, by blocking the active sites of copper surfaces. At this point it is important to draw attention to the differences between the carefully prepared surfaces investigated in this study, and the highly heterogeneous fly ash in the complex environment of an incinerator. Details of the phenomena observed in the laboratory cannot be transferred to the technical plant, and we cannot exclude the possiblity that other modes of inhibitory action are important in the incinerator environment. However, the relevant results on the inhibition of dioxin formation obtained in the pilot plant are consistent with the mechanisms proposed in this study.

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Studies of the global baseline pollution XIII

Cited by 50 publications

References 27 publications

Involvement of Cytochrome P450 in Pentachlorophenol Transformation in a White Rot Fungus Phanerochaete chrysosporium

Involvement of Cytochrome P450 in Pentachlorophenol Transformation in a White Rot Fungus Phanerochaete chrysosporium

Analysis of halogenated methoxybenzenes and hexachlorobenzene (HCB) in the picogram m−3 range in marine air

Role of plant biomass in the global environmental partitioning of chlorinated hydrocarbons

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