Dieter Janke

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Microbial cometabolism, i.e. "transformation of a non-growth substrate in the obligate presence of a growth substrate or another transformable compound" (Dalton and Stirling 1982) is a whole-cell phenomenon physiologically based on coupling of different catabolic pathways at the cellular level. It is frequently observed in transformation of xenobiotic(More)
The transection and superposition relationships among channels, chaos, surface materials units, and other features in the circum-Chryse region of Mars were used to evaluate relative age relationships and evolution of flood events. Channels and chaos in contact (with one another) were treated as single discrete flood-carved systems. Some outflow channel(More)
The ability of strains of the genusRhodococcus to transform chlorinated phenolic compounds was studied. Noninduced cells of several strains ofRhodococcus, covering at least eight species, were found to attack mono-, di-, and trichlorophenols by hydroxylation at theortho position to chlorocatechols. 3-chlorophenol and 4-chlorophenol were converted to(More)
Plasmid pPGH1 originating from Pseudomonas putida strain H carries all the genes required for the degradation of phenol (or cresols) via the meta cleavage pathway. Besides mobilization of pPGH1 by a plasmid of the incompatibility group P-1, hybrid plasmids conferring the Phl+ phenotype could be selected, when R68.45 was the conjugative plasmid. The hybrids(More)
A special approach was used to elucidate the "threshold" inducer concentration for coordinative de novo synthesis of phenol hydroxylase(s), catechol 2,3-dioxygenase and the 2-hydroxymuconic semialdehyde-metabolizing enzymes which initiate phenol catabolism in Pseudomonas putida strain H. It is based on cell-precultivation with glucose (as the carbon and(More)
One-step conversion of aniline, phenol and some of their monochlorinated derivatives into the corresponding catechols by resting pre-adapted cells of the Rhodococcus mutant strain AM 144 (defective in synthesis of catechol 1,2-dioxygenase) was shown to depend on the availability of an additional metabolizable carbon substrate, e.g. glucose or acetate. A(More)
Two newly isolated aniline-degrading bacterial strains were characterized with regard to their enzyme systems responsible for aniline catabolism. One of them identified as a Rhodococcus sp. metabolized aniline exclusively via the beta-ketoadipate pathway by means of inducible enzymes. The aniline-degrading enzyme system of the second isolate, presumably a(More)
In order to characterize the ability of Pseudomonas putida (TREVISAN 1889) MIGULA 1895 strain H to degrade various mono- and diphenolic aromatic compounds, respiratory activities towards phenol, catechol, and the cresol isomers were determined. The following rates of oxygen uptake (QO2) were obtained with resting phenol-grown cells: phenol -- 229, o-cresol(More)
Various organic compounds were tested for their ability to stimulate degradation of monochloroanilines by aniline-grown cells ofRhodocuccus sp. An 117 in 0.1 M phosphate buffer, pH 6.9. Among them, glucose proved to be the most effective. In its presence both 2- and 3-chloroaniline were degraded with a transient accumulation of 3- and 4-chlorocatechnol,(More)
The ability to O-methylate chlorinated phenols and phenol derivatives in the genus Rhodococcus was studied. Several species and strains O-methylated chlorophenols to the corresponding anisoles, namely R. equi, R. erythropolis, R. rhodochrous, and Rhodococcus sp. strains P1 and An 117. The ability for a strain to O-methylate chlorophenols did not require(More)