Lammer, H., Barucci, A., Beebe, R., Blamont, J., ...
De Champs, C., Chanal, C., Sirot, D., Baraduc, R., Romaszko, J. P., Bonnet, R., ...
Objectives: To evaluate the frequency and diversity of extended-spectrum β-lactamases (ESBLs) produced by Enterobacteriaceae and Pseudomonas aeruginosa in one French region. Methods: During...
De Champs, C., Chanal, C., Sirot, D., Baraduc, R., Romaszko, J. P., Bonnet, R., ...
Objectives: To evaluate the frequency and diversity of extended-spectrum β-lactamases (ESBLs) produced by Enterobacteriaceae and Pseudomonas aeruginosa in one French region. Methods: During...
Effect of D240G substitution in a novel ESBL CTX-M-27 (2003)
Bonnet, R., Recule, C., Baraduc, R., Chanal, C., Sirot, D., De Champs, C., ...
Escherichia coli clinical strain Gre-1 collected in 2000 from a French hospital harboured a novel CTX-M-encoding gene, designated blaCTX-M-27. CTX-M-27 differed from CTX-M-14 only by the substitution...
Effect of D240G substitution in a novel ESBL CTX-M-27 (2003)
Bonnet, R., Recule, C., Baraduc, R., Chanal, C., Sirot, D., De Champs, C., ...
Escherichia coli clinical strain Gre-1 collected in 2000 from a French hospital harboured a novel CTX-M-encoding gene, designated blaCTX-M-27. CTX-M-27 differed from CTX-M-14 only by the substitution...
Effect of D240G substitution in a novel ESBL CTX-M-27 (2003)
Bonnet, R., Recule, C., Baraduc, R., Chanal, C., Sirot, D., De Champs, C., ...
Escherichia coli clinical strain Gre-1 collected in 2000 from a French hospital harboured a novel CTX-M-encoding gene, designated blaCTX-M-27. CTX-M-27 differed from CTX-M-14 only by the substitution...
Clinical relevance of Proteus mirabilis in hospital patients: a two year survey (2000)
De Champs, C., Bonnet, R., Sirot, D., Chanal, C., Sirot, J.
A retrospective study was performed on 1072 non-duplicate isolates of Proteus mirabilis, taken in the period April 1996 to March 1998, and on 100 patient charts randomly selected during the same...
An Estimation of Intrinsic Fault Energies in (Ni, Al, Ti, Cr) Alloys Based on Ni3Al. (1998)
Creep deformation at 740 C of various L1(sub 2) alloys (Ni-Al-Ti-Cr), the compositions of which are based on Ni3Al, have been examined; the deformed samples exhibit peculiar extended defects which...
Evidence for Microtwinning as a Deformation Mechanism in CMSX-2 Superalloy. (1998)
Most of the planar defects in the gamma-prime phase in an individual grain of CMSX2, rapidly deformed by compression at 900 C, along a cubic axis, are actually thin microtwins created during high...
Atomic Structure of Internal Interfaces in a Ti3Al-TiAl Two-Phase Alloy. (1998)
Penisson, J. M., Bonnet, R., Loubradou, M., Derder, C.
Tial/ti3al colonies in an as-cast ti-40 at.%al alloy have been studied using HREM. their microstructures consist mainly of alternating parallel lamellae of gamma (tial, l1(sub 0)) and alpha2 (ti3al,...
Ignat, M., Bonnet, R., Durand, F.
This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, data, mmc, mmc data, reinforcement data materials and material...
Les superalliages biphases a base de nickel a tres forte fraction volumique de phase durcissante (gamma') sont principalement utilises dans l'industrie aeronautique pour la fabrication des aubes de...
Défauts interfaciaux liés au début de la coalescence des précipités γ' du superalliage MC2 (1996)
Lay, S., Missiaen, J., Bonnet, R.
Pas de Résumé disponible
Microscopie à haute résolution d'une interface semi-cohérente phase µ/matrice γ-γ' (1996)
Bonnet, R., Loubradou, M., Pénisson, J.
Pas de Résumé disponible
Défauts interfaciaux liés au début de la coalescence des précipités γ' du superalliage MC2 (1996)
Lay, S., Missiaen, J., Bonnet, R.
Pas de Résumé disponible
Microscopie à haute résolution d'une interface semi-cohérente phase µ/matrice γ-γ' (1996)
Bonnet, R., Loubradou, M., Pénisson, J.
Pas de Résumé disponible
Défauts interfaciaux liés au début de la coalescence des précipités γ' du superalliage MC2 (1996)
Lay, S., Missiaen, J., Bonnet, R.
Pas de Résumé disponible
Microscopie à haute résolution d'une interface semi-cohérente phase µ/matrice γ-γ' (1996)
Bonnet, R., Loubradou, M., Pénisson, J.
Pas de Résumé disponible
Bellet, D., Bastie, P., Royer, A., Lajzerowicz, J., Legrand, J., Bonnet, R.
The morphology of γ' precipitates of AM1 single crystal superalloys has been studied by small neutron scattering (SANS), and electron microscopy. Due to the single crystal nature of the samples,...
Bellet, D., Bastie, P., Royer, A., Lajzerowicz, J., Legrand, J., Bonnet, R.
The morphology of γ' precipitates of AM1 single crystal superalloys has been studied by small neutron scattering (SANS), and electron microscopy. Due to the single crystal nature of the samples,...
Bellet, D., Bastie, P., Royer, A., Lajzerowicz, J., Legrand, J., Bonnet, R.
The morphology of γ' precipitates of AM1 single crystal superalloys has been studied by small neutron scattering (SANS), and electron microscopy. Due to the single crystal nature of the samples,...
Structure atomique du joint de mâcle ∑(111) dans Ni3(Al,Nb) (1991)
Bonnet, R, Derder, C, Loubradou, M, Catana, A, Stadelmann, PA
THE STRUCTURE OF INTERFACES (1985)
Some of the linear features visible on grain and phase boundaries are considered in terms of established dislocation theory. The natures of intrinsic DSC phase boundary dislocations, imperfect and...
THE STRUCTURE OF INTERFACES (1985)
Some of the linear features visible on grain and phase boundaries are considered in terms of established dislocation theory. The natures of intrinsic DSC phase boundary dislocations, imperfect and...
THE STRUCTURE OF INTERFACES (1985)
Some of the linear features visible on grain and phase boundaries are considered in terms of established dislocation theory. The natures of intrinsic DSC phase boundary dislocations, imperfect and...
DISLOCATIONS INTERFACIALES EN ELASTICITE ANISOTROPE ET ISOTROPE NON HOMOGENE (1982)
Les champs élastiques de différents types de dislocations interfaciales sont illustrés en s'appuyant sur des exemples variés en élasticité anisotrope et isotrope non homogène. Le schéma du...
DISLOCATIONS INTERFACIALES EN ELASTICITE ANISOTROPE ET ISOTROPE NON HOMOGENE (1982)
Les champs élastiques de différents types de dislocations interfaciales sont illustrés en s'appuyant sur des exemples variés en élasticité anisotrope et isotrope non homogène. Le schéma du...
DISLOCATIONS INTERFACIALES EN ELASTICITE ANISOTROPE ET ISOTROPE NON HOMOGENE (1982)
Les champs élastiques de différents types de dislocations interfaciales sont illustrés en s'appuyant sur des exemples variés en élasticité anisotrope et isotrope non homogène. Le schéma du...
Des essais de cisaillements cycliques, à des températures variant de 360 °C à 460 °C, ont été réalisés sur l'eutectique lamellaire Al-Al2Cu(θ) obtenu par solidification dirigée. La...
Des essais de cisaillements cycliques, à des températures variant de 360 °C à 460 °C, ont été réalisés sur l'eutectique lamellaire Al-Al2Cu(θ) obtenu par solidification dirigée. La...
Des essais de cisaillements cycliques, à des températures variant de 360 °C à 460 °C, ont été réalisés sur l'eutectique lamellaire Al-Al2Cu(θ) obtenu par solidification dirigée. La...
RELATIONS ENTRE LA STRUCTURE DU JOINT DE PHASES ET LE RÉSEAU DE COÏNCIDENCE (1975)
Un certain nombre de joints de phases (AlNi/Cr, Al/Al2Cu, Fe/Fe3C, Cu/Cu9Al4, Sn/Zn, Pb/Sn, Ni/Ni3Nb) sont discutés à l'aide du concept du réseau de coïncidence. Les vecteurs de Burgers sont...
RELATIONS ENTRE LA STRUCTURE DU JOINT DE PHASES ET LE RÉSEAU DE COÏNCIDENCE (1975)
Un certain nombre de joints de phases (AlNi/Cr, Al/Al2Cu, Fe/Fe3C, Cu/Cu9Al4, Sn/Zn, Pb/Sn, Ni/Ni3Nb) sont discutés à l'aide du concept du réseau de coïncidence. Les vecteurs de Burgers sont...
RELATIONS ENTRE LA STRUCTURE DU JOINT DE PHASES ET LE RÉSEAU DE COÏNCIDENCE (1975)
Un certain nombre de joints de phases (AlNi/Cr, Al/Al2Cu, Fe/Fe3C, Cu/Cu9Al4, Sn/Zn, Pb/Sn, Ni/Ni3Nb) sont discutés à l'aide du concept du réseau de coïncidence. Les vecteurs de Burgers sont...
1me Thèse--Univ. de Strasbourg.
Thèse. Sc. nat. Strasbourg. 1930. No 27.
L'évolution de l'azote au cours de la germination ... (1929)
2me Thèse--Univ. de Strasbourg.
Thesis (doctoral)--Ecole nationale vétérinaire de Toulouse, 1929.
Diversity of TEM Mutants in Proteus mirabilis
Bonnet, R., De Champs, C., Sirot, D., Chanal, C., Labia, R., Sirot, J.
In a survey of resistance to amoxicillin among clinical isolates of Proteus mirabilis, 10 TEM-type β-lactamases were characterized: (i) the well-known penicillinases TEM-1 and TEM-2, the...
Chanal, C., Bonnet, R., De Champs, C., Sirot, D., Labia, R., Sirot, J.
β-Lactam resistance was studied in 1,072 consecutive P. mirabilis clinical strains isolated at the Clermont-Ferrand teaching hospital between April 1996 and March 1998. The frequency of amoxicillin...
A Novel CTX-M β-Lactamase (CTX-M-8) in Cefotaxime-Resistant Enterobacteriaceae Isolated in Brazil
Bonnet, R., Sampaio, J. L. M., Labia, R., De Champs, C., Sirot, D., Chanal, C., ...
To estimate the diversity of extended-spectrum β-lactamases in Brazil, 18 strains from different species of the family Enterobacteriaceae exhibiting a positive double-disk synergy test were...
Inhibitor-Resistant TEM-33 β-Lactamase in a Shigella sonnei Isolate
Sirot, D., Chanal, C., Bonnet, R., De Champs, C., Sirot, J., Bret, L.
Novel Cefotaximase (CTX-M-16) with Increased Catalytic Efficiency Due to Substitution Asp-240→Gly
Bonnet, R., Dutour, C., Sampaio, J. L. M., Chanal, C., Sirot, D., Labia, R., ...
Three clinical strains (Escherichia coli Rio-6, E. coli Rio-7, and Enterobacter cloacae Rio-9) collected in 1996 and 1999 from hospitals in Rio de Janeiro (Brazil) were resistant to broad-spectrum...
A Novel Class A Extended-Spectrum β-Lactamase (BES-1) in Serratia marcescens Isolated in Brazil
Bonnet, R., Sampaio, J. L. M., Chanal, C., Sirot, D., De Champs, C., Viallard, J. L., ...
Serratia marcescens Rio-5, one of 18 extended-spectrum β-lactamase (ESBL)-producing strains isolated in several hospitals in Rio de Janeiro (Brazil) in 1996 and 1997, exhibited a high level of...
A 1998 Survey of Extended-Spectrum β-Lactamases in Enterobacteriaceae in France
De Champs, C., Sirot, D., Chanal, C., Bonnet, R., Sirot, J.
In a 3-month period in 1998, 79 consecutive isolates of Enterobacteriaceae producing an extended-spectrum β-lactamase (ESBL) were collected. ESBLs were predominantly TEM derivatives (74 of 79):...
First Isolation of a CTX-M-3-Producing Enterobacter cloacae in France
Doucet-Populaire, Florence, Ghnassia, J. C., Bonnet, R., Sirot, J.
Bonnet, R., Souweine, B., Gauthier, G., Rich, C., Livrelli, V., Sirot, J., ...
From August 1996 to May 1997, six verotoxin-producing Escherichia coli (VTEC) strains were isolated from stool specimens of adults suffering from hemolytic-uremic syndrome (HUS). All the isolates...
CTX-M-1, CTX-M-3, and CTX-M-14 β-Lactamases from Enterobacteriaceae Isolated in France
Dutour, C., Bonnet, R., Marchandin, H., Boyer, M., Chanal, C., Sirot, D., ...
Six clinical CTX-M-producing isolates of the family Enterobacteriaceae were detected between 1999 and 2000 in different French hospitals. Two strains produced CTX-M-1 and CTX-M-3 and four strains...
TEM Derivative-Producing Enterobacter aerogenes Strains: Dissemination of a Prevalent Clone
Dumarche, P., De Champs, C., Sirot, D., Chanal, C., Bonnet, R., Sirot, J.
TEM-24 (CAZ-6) extended-spectrum β-lactamase (ESBL) was detected in 1988 in Clermont-Ferrand, France, in Klebsiella pneumoniae (blaTEM-24) and Enterobacter aerogenes (blaTEM-24b), and since 1994, a...
Chromosome-Encoded Class D β-Lactamase OXA-23 in Proteus mirabilis
Bonnet, R., Marchandin, H., Chanal, C., Sirot, D., Labia, R., De Champs, C., ...
Ten nonrepetitive Proteus mirabilis isolates, which were collected over 4 years (1996 to 1999) at the teaching hospital of Clermont-Ferrand, France, produced class D carbapenemase OXA-23. MICs of...
Effects of Ser130Gly and Asp240Lys Substitutions in Extended-Spectrum β-Lactamase CTX-M-9
Aumeran, C., Chanal, C., Labia, R., Sirot, D., Sirot, J., Bonnet, R.
In CTX-M-9 extended-spectrum β-lactamases (ESBLs), an S130G mutation induced a 40- to 650-fold increase in 50% inhibitory concentrations but decreased hydrolytic activity against cefotaxime. A D240K...
Unexpected Enzyme TEM-126: Role of Mutation Asp179Glu
Delmas, J., Robin, F., Bittar, F., Chanal, C., Bonnet, R.
The clinical isolate Escherichia coli CF884 exhibited low-level resistance to ceftazidime (4 μg/ml) by a positive double-disk synergy test and apparent susceptibility to cefuroxime, cefotaxime,...
Robin, F., Delmas, J., Chanal, C., Sirot, D., Sirot, J., Bonnet, R.
Escherichia coli CF349 exhibited a complex β-lactam resistance phenotype, including resistance to amoxicillin and ticarcillin alone and in combination with clavulanate and to some extended-spectrum...
Prediction of the Evolution of Ceftazidime Resistance in Extended-Spectrum β-Lactamase CTX-M-9
Delmas, J., Robin, F., Carvalho, F., Mongaret, C., Bonnet, R.
A random mutagenesis technique was used to predict the evolutionary potential of β-lactamase CTX-M-9 toward the acquisition of improved catalytic activity against ceftazidime. Thirty CTX-M mutants...
Diversity of TEM Mutants in Proteus mirabilis
Bonnet, R., De Champs, C., Sirot, D., Chanal, C., Labia, R., Sirot, J.
In a survey of resistance to amoxicillin among clinical isolates of Proteus mirabilis, 10 TEM-type β-lactamases were characterized: (i) the well-known penicillinases TEM-1 and TEM-2, the...
Chanal, C., Bonnet, R., De Champs, C., Sirot, D., Labia, R., Sirot, J.
β-Lactam resistance was studied in 1,072 consecutive P. mirabilis clinical strains isolated at the Clermont-Ferrand teaching hospital between April 1996 and March 1998. The frequency of amoxicillin...
A Novel CTX-M β-Lactamase (CTX-M-8) in Cefotaxime-Resistant Enterobacteriaceae Isolated in Brazil
Bonnet, R., Sampaio, J. L. M., Labia, R., De Champs, C., Sirot, D., Chanal, C., ...
To estimate the diversity of extended-spectrum β-lactamases in Brazil, 18 strains from different species of the family Enterobacteriaceae exhibiting a positive double-disk synergy test were...
Inhibitor-Resistant TEM-33 β-Lactamase in a Shigella sonnei Isolate
Sirot, D., Chanal, C., Bonnet, R., De Champs, C., Sirot, J., Bret, L.
Novel Cefotaximase (CTX-M-16) with Increased Catalytic Efficiency Due to Substitution Asp-240→Gly
Bonnet, R., Dutour, C., Sampaio, J. L. M., Chanal, C., Sirot, D., Labia, R., ...
Three clinical strains (Escherichia coli Rio-6, E. coli Rio-7, and Enterobacter cloacae Rio-9) collected in 1996 and 1999 from hospitals in Rio de Janeiro (Brazil) were resistant to broad-spectrum...
A Novel Class A Extended-Spectrum β-Lactamase (BES-1) in Serratia marcescens Isolated in Brazil
Bonnet, R., Sampaio, J. L. M., Chanal, C., Sirot, D., De Champs, C., Viallard, J. L., ...
Serratia marcescens Rio-5, one of 18 extended-spectrum β-lactamase (ESBL)-producing strains isolated in several hospitals in Rio de Janeiro (Brazil) in 1996 and 1997, exhibited a high level of...
A 1998 Survey of Extended-Spectrum β-Lactamases in Enterobacteriaceae in France
De Champs, C., Sirot, D., Chanal, C., Bonnet, R., Sirot, J.
In a 3-month period in 1998, 79 consecutive isolates of Enterobacteriaceae producing an extended-spectrum β-lactamase (ESBL) were collected. ESBLs were predominantly TEM derivatives (74 of 79):...
First Isolation of a CTX-M-3-Producing Enterobacter cloacae in France
Doucet-Populaire, Florence, Ghnassia, J. C., Bonnet, R., Sirot, J.
Bonnet, R., Souweine, B., Gauthier, G., Rich, C., Livrelli, V., Sirot, J., ...
From August 1996 to May 1997, six verotoxin-producing Escherichia coli (VTEC) strains were isolated from stool specimens of adults suffering from hemolytic-uremic syndrome (HUS). All the isolates...
CTX-M-1, CTX-M-3, and CTX-M-14 β-Lactamases from Enterobacteriaceae Isolated in France
Dutour, C., Bonnet, R., Marchandin, H., Boyer, M., Chanal, C., Sirot, D., ...
Six clinical CTX-M-producing isolates of the family Enterobacteriaceae were detected between 1999 and 2000 in different French hospitals. Two strains produced CTX-M-1 and CTX-M-3 and four strains...
TEM Derivative-Producing Enterobacter aerogenes Strains: Dissemination of a Prevalent Clone
Dumarche, P., De Champs, C., Sirot, D., Chanal, C., Bonnet, R., Sirot, J.
TEM-24 (CAZ-6) extended-spectrum β-lactamase (ESBL) was detected in 1988 in Clermont-Ferrand, France, in Klebsiella pneumoniae (blaTEM-24) and Enterobacter aerogenes (blaTEM-24b), and since 1994, a...
Chromosome-Encoded Class D β-Lactamase OXA-23 in Proteus mirabilis
Bonnet, R., Marchandin, H., Chanal, C., Sirot, D., Labia, R., De Champs, C., ...
Ten nonrepetitive Proteus mirabilis isolates, which were collected over 4 years (1996 to 1999) at the teaching hospital of Clermont-Ferrand, France, produced class D carbapenemase OXA-23. MICs of...
Effects of Ser130Gly and Asp240Lys Substitutions in Extended-Spectrum β-Lactamase CTX-M-9
Aumeran, C., Chanal, C., Labia, R., Sirot, D., Sirot, J., Bonnet, R.
In CTX-M-9 extended-spectrum β-lactamases (ESBLs), an S130G mutation induced a 40- to 650-fold increase in 50% inhibitory concentrations but decreased hydrolytic activity against cefotaxime. A D240K...
Unexpected Enzyme TEM-126: Role of Mutation Asp179Glu
Delmas, J., Robin, F., Bittar, F., Chanal, C., Bonnet, R.
The clinical isolate Escherichia coli CF884 exhibited low-level resistance to ceftazidime (4 μg/ml) by a positive double-disk synergy test and apparent susceptibility to cefuroxime, cefotaxime,...
Robin, F., Delmas, J., Chanal, C., Sirot, D., Sirot, J., Bonnet, R.
Escherichia coli CF349 exhibited a complex β-lactam resistance phenotype, including resistance to amoxicillin and ticarcillin alone and in combination with clavulanate and to some extended-spectrum...
Prediction of the Evolution of Ceftazidime Resistance in Extended-Spectrum β-Lactamase CTX-M-9
Delmas, J., Robin, F., Carvalho, F., Mongaret, C., Bonnet, R.
A random mutagenesis technique was used to predict the evolutionary potential of β-lactamase CTX-M-9 toward the acquisition of improved catalytic activity against ceftazidime. Thirty CTX-M mutants...
Sec- and Tat-Dependent Translocation of β-Lactamases across the Escherichia coli Inner Membrane▿ †
Pradel, N., Delmas, J., Wu, L. F., Santini, C. L., Bonnet, R.
β-Lactamases represent the major resistance mechanism of gram-negative bacteria against β-lactam antibiotics. The amino acid sequences of these proteins vary widely, but all are located in the...