T. Köhler

Publication List Details

Period

1990 - 2007

Number

70

Co-Authors

Adiabatic association of ultracold molecules via magnetic-field tunable interactions. (2004)

Góral, K., Köhler, T., Gardiner, S. A., Tiesinga, E., Julienne, P. S.

We consider in detail the situation of applying a time-dependent external magnetic field to a 87Rb atomic Bose–Einstein condensate held in a harmonic trap, in order to adiabatically sweep the...

The van der Waals potential between metastable atoms and solid surfaces: Novel diffraction experiments vs. theory (2002)

Brühl,R., Fouquet,P., Grisenti,R. E., Toennies,J. P., Hegerfeldt,G. C., Köhler,T., ...

Highly polarizable metastable He* (23S) and Ne* (23P) atoms have been diffracted from a 100 nm period silicon nitride transmission grating and the van der Waals coefficients C3 for the interaction of...

The van der Waals potential between metastable atoms and solid surfaces: Novel diffraction experiments vs. theory (2002)

Brühl, R., Fouquet, P., Grisenti, R. E., Toennies, J. P., Hegerfeldt, G. C., Köhler, T., ...

Highly polarizable metastable He* (23S) and Ne* (23P) atoms have been diffracted from a 100 nm period silicon nitride transmission grating and the van der Waals coefficients C3 for the interaction of...

Review on the non-destructive characterization and application of doped and undoped polycrystalline diamond films (2002)

Werner, M., Köhler, T., Mietke, S., Wörner, E., Johnston, C.

In this overview the mechanical, thermal and electrical properties of CVD (Chemical Vapor Deposition) diamond, determined by various non-destructive techniques, are highlighted and compared with...

Differential Selection of Multidrug Efflux Mutants by Trovafloxacin and Ciprofloxacin in an Experimental Model of Pseudomonas aeruginosa Acute Pneumonia in Rats

Join-Lambert, O. F., Michéa-Hamzehpour, M., Köhler, T., Chau, F., Faurisson, F., Dautrey, S., ...

The ability of trovafloxacin and ciprofloxacin to select efflux mutants in vivo was studied in a model of acute Pseudomonas aeruginosa pneumonia in rats. Twelve hours after intratracheal inoculation...

Evidence for an efflux pump in multidrug-resistant Campylobacter jejuni.

Charvalos, E, Tselentis, Y, Hamzehpour, M M, Köhler, T, Pechere, J C

Mechanisms of drug resistance in Campylobacter jejuni were investigated. Mutant strains 34PEFr, which was resistant to pefloxacin (128-fold increase in the MIC), and 34CTXr, which was resistant to...

OprK and OprM define two genetically distinct multidrug efflux systems in Pseudomonas aeruginosa.

Hamzehpour, M M, Pechere, J C, Plesiat, P, Köhler, T

Multidrug-resistant derivatives of Pseudomonas aeruginosa PAO1 were obtained after stepwise selection on tetracycline or erythromycin. Two phenotypes were generated. The tetracycline-resistant mutant...

Multidrug efflux in intrinsic resistance to trimethoprim and sulfamethoxazole in Pseudomonas aeruginosa.

Köhler, T, Kok, M, Michea-Hamzehpour, M, Plesiat, P, Gotoh, N, Nishino, T, ...

Pseudomonas aeruginosa possesses at least two multiple drug efflux systems which are defined by the outer membrane proteins OprM and OprJ. We have found that mutants overexpressing OprM were two- and...

Differential selection of multidrug efflux systems by quinolones in Pseudomonas aeruginosa.

Köhler, T, Michea-Hamzehpour, M, Plesiat, P, Kahr, A L, Pechere, J C

Resistance mechanisms selected after in vitro exposure to 12 quinolones were analyzed for Pseudomonas aeruginosa. Efflux-type mutants were predominant. Quinolones differed in their ability to select...

Comamonas testosteroni 3-ketosteroid-delta 4(5 alpha)-dehydrogenase: gene and protein characterization.

Florin, C, Köhler, T, Grandguillot, M, Plesiat, P

Comamonas testosteroni delta 4(5 alpha)- and delta1-dehydrogenases [delta4(5alpha)- and delta1DH] are key enzymes in the degradation of steroids having an A:B ring fusion in a trans configuration. We...

Use of steroids to monitor alterations in the outer membrane of Pseudomonas aeruginosa.

Plesiat, P, Aires, J R, Godard, C, Köhler, T

Testosterone (a strongly hydrophobic steroid) and testosterone hemisuccinate (a negatively charged derivative) were used as probes to investigate alterations in the outer membrane of Pseudomonas...

Cross talk between catabolic pathways in Pseudomonas putida: XylS-dependent and -independent activation of the TOL meta operon requires the same cis-acting sequences within the Pm promoter.

Kessler, B, Marqués, S, Köhler, T, Ramos, J L, Timmis, K N, De Lorenzo, V

The Pm promoter of the meta cleavage operon in the TOL (toluene degradation) plasmid pWW0 of Pseudomonas putida becomes activated by the plasmid-encoded XylS regulator in the presence of benzoate and...

Isolation and phenotypic characterization of Myxococcus xanthus mutants which are defective in sensing negative stimuli.

Shi, W, Köhler, T, Zusman, D R

Myxococcus xanthus is a gram-negative gliding bacterium that exhibits a complex life cycle. Exposure of M. xanthus to chemicals like dimethyl sulfoxide (DMSO) at nondeleterious concentrations or the...

Methylation of FrzCD, a methyl-accepting taxis protein of Myxococcus xanthus, is correlated with factors affecting cell behavior.

McBride, M J, Köhler, T, Zusman, D R

Myxococcus xanthus, a nonflagellated gliding bacterium, exhibits multicellular behavior during vegetative growth and fruiting body formation. The frizzy (frz) genes are required to control directed...

Involvement of Pseudomonas putida RpoN sigma factor in regulation of various metabolic functions.

Köhler, T, Harayama, S, Ramos, J L, Timmis, K N

The RpoN protein was originally identified in Escherichia coli as a sigma (sigma) factor essential for the expression of nitrogen regulons. In the present study we cloned the Pseudomonas putida rpoN...

Growth-phase-dependent expression of the Pseudomonas putida TOL plasmid pWW0 catabolic genes.

Köhler, T, Rekik, M, Harayama, S

Pseudomonas putida TOL plasmid pWW0 catabolic genes are clustered into two operons. The first, the upper operon, is controlled by the xylR regulatory gene, whereas the second, the meta operon, is...

Activities of Garenoxacin against Quinolone-Resistant Streptococcus pneumoniae Strains In Vitro and in a Mouse Pneumonia Model

Azoulay-Dupuis, E., Bédos, J. P., Mohler, J., Peytavin, G., Isturiz, R., Moine, P., ...

Garenoxacin is a novel des-F(6) quinolone with enhanced in vitro activities against both gram-positive and gram-negative bacteria. We compared the activity of garenoxacin with that of trovafloxacin...

Activity of Gemifloxacin against Quinolone-Resistant Streptococcus pneumoniae Strains In Vitro and in a Mouse Pneumonia Model

Azoulay-Dupuis, E., Bédos, J. P., Mohler, J., Moine, P., Cherbuliez, C., Peytavin, G., ...

Gemifloxacin is a novel fluoronaphthyridone quinolone with enhanced in vitro activity against Streptococcus pneumoniae. We investigated the activities of gemifloxacin and trovafloxacin, their...

Differential Selection of Multidrug Efflux Mutants by Trovafloxacin and Ciprofloxacin in an Experimental Model of Pseudomonas aeruginosa Acute Pneumonia in Rats

Join-Lambert, O. F., Michéa-Hamzehpour, M., Köhler, T., Chau, F., Faurisson, F., Dautrey, S., ...

The ability of trovafloxacin and ciprofloxacin to select efflux mutants in vivo was studied in a model of acute Pseudomonas aeruginosa pneumonia in rats. Twelve hours after intratracheal inoculation...

Evidence for an efflux pump in multidrug-resistant Campylobacter jejuni.

Charvalos, E, Tselentis, Y, Hamzehpour, M M, Köhler, T, Pechere, J C

Mechanisms of drug resistance in Campylobacter jejuni were investigated. Mutant strains 34PEFr, which was resistant to pefloxacin (128-fold increase in the MIC), and 34CTXr, which was resistant to...

OprK and OprM define two genetically distinct multidrug efflux systems in Pseudomonas aeruginosa.

Hamzehpour, M M, Pechere, J C, Plesiat, P, Köhler, T

Multidrug-resistant derivatives of Pseudomonas aeruginosa PAO1 were obtained after stepwise selection on tetracycline or erythromycin. Two phenotypes were generated. The tetracycline-resistant mutant...

Multidrug efflux in intrinsic resistance to trimethoprim and sulfamethoxazole in Pseudomonas aeruginosa.

Köhler, T, Kok, M, Michea-Hamzehpour, M, Plesiat, P, Gotoh, N, Nishino, T, ...

Pseudomonas aeruginosa possesses at least two multiple drug efflux systems which are defined by the outer membrane proteins OprM and OprJ. We have found that mutants overexpressing OprM were two- and...

Differential selection of multidrug efflux systems by quinolones in Pseudomonas aeruginosa.

Köhler, T, Michea-Hamzehpour, M, Plesiat, P, Kahr, A L, Pechere, J C

Resistance mechanisms selected after in vitro exposure to 12 quinolones were analyzed for Pseudomonas aeruginosa. Efflux-type mutants were predominant. Quinolones differed in their ability to select...

Comamonas testosteroni 3-ketosteroid-delta 4(5 alpha)-dehydrogenase: gene and protein characterization.

Florin, C, Köhler, T, Grandguillot, M, Plesiat, P

Comamonas testosteroni delta 4(5 alpha)- and delta1-dehydrogenases [delta4(5alpha)- and delta1DH] are key enzymes in the degradation of steroids having an A:B ring fusion in a trans configuration. We...

Use of steroids to monitor alterations in the outer membrane of Pseudomonas aeruginosa.

Plesiat, P, Aires, J R, Godard, C, Köhler, T

Testosterone (a strongly hydrophobic steroid) and testosterone hemisuccinate (a negatively charged derivative) were used as probes to investigate alterations in the outer membrane of Pseudomonas...

Cross talk between catabolic pathways in Pseudomonas putida: XylS-dependent and -independent activation of the TOL meta operon requires the same cis-acting sequences within the Pm promoter.

Kessler, B, Marqués, S, Köhler, T, Ramos, J L, Timmis, K N, De Lorenzo, V

The Pm promoter of the meta cleavage operon in the TOL (toluene degradation) plasmid pWW0 of Pseudomonas putida becomes activated by the plasmid-encoded XylS regulator in the presence of benzoate and...

Isolation and phenotypic characterization of Myxococcus xanthus mutants which are defective in sensing negative stimuli.

Shi, W, Köhler, T, Zusman, D R

Myxococcus xanthus is a gram-negative gliding bacterium that exhibits a complex life cycle. Exposure of M. xanthus to chemicals like dimethyl sulfoxide (DMSO) at nondeleterious concentrations or the...

Methylation of FrzCD, a methyl-accepting taxis protein of Myxococcus xanthus, is correlated with factors affecting cell behavior.

McBride, M J, Köhler, T, Zusman, D R

Myxococcus xanthus, a nonflagellated gliding bacterium, exhibits multicellular behavior during vegetative growth and fruiting body formation. The frizzy (frz) genes are required to control directed...

Involvement of Pseudomonas putida RpoN sigma factor in regulation of various metabolic functions.

Köhler, T, Harayama, S, Ramos, J L, Timmis, K N

The RpoN protein was originally identified in Escherichia coli as a sigma (sigma) factor essential for the expression of nitrogen regulons. In the present study we cloned the Pseudomonas putida rpoN...

Growth-phase-dependent expression of the Pseudomonas putida TOL plasmid pWW0 catabolic genes.

Köhler, T, Rekik, M, Harayama, S

Pseudomonas putida TOL plasmid pWW0 catabolic genes are clustered into two operons. The first, the upper operon, is controlled by the xylR regulatory gene, whereas the second, the meta operon, is...

Activities of Garenoxacin against Quinolone-Resistant Streptococcus pneumoniae Strains In Vitro and in a Mouse Pneumonia Model

Azoulay-Dupuis, E., Bédos, J. P., Mohler, J., Peytavin, G., Isturiz, R., Moine, P., ...

Garenoxacin is a novel des-F(6) quinolone with enhanced in vitro activities against both gram-positive and gram-negative bacteria. We compared the activity of garenoxacin with that of trovafloxacin...