"Une rhétorique par objet". Les mimétismes dans l'oeuvre de Francis Ponge

Book published by Hermann (2011)

Cet ouvrage étudie l'extraordinaire virtuosité avec laquelle Francis Ponge adapte, pour chaque poème, son écriture à l'objet dont il traite. Quinze textes sont ici analysés en détail non sans aborder les ... [more ▼]

Cet ouvrage étudie l'extraordinaire virtuosité avec laquelle Francis Ponge adapte, pour chaque poème, son écriture à l'objet dont il traite. Quinze textes sont ici analysés en détail non sans aborder les nombreuses questions théoriques que pose une telle pratique quant aux liens fondamentaux entre expression et contenu. [less ▲]

Rhétorique, idéologie et décadence

in Citti Pierre (Ed.) Fins de siècle (1990)

Rheumatic and musculoskeletal diseases and impaired quality of life. A challenge for rheumatologists

in Journal of Rheumatology (1996), 23

Rheumatoid hand joint synovitis: gray-scale and power Doppler US quantifications following anti-tumor necrosis factor-alpha treatment: pilot study

in Radiology (2003), 229(2), 562-569

PURPOSE: To evaluate by using B-mode and power Doppler ultrasonography (US) and clinical assessment the response of hand joint synovitis in patients with active rheumatoid arthritis (RA) to treatment with ... [more ▼]

PURPOSE: To evaluate by using B-mode and power Doppler ultrasonography (US) and clinical assessment the response of hand joint synovitis in patients with active rheumatoid arthritis (RA) to treatment with the anti-tumor necrosis factor-alpha agent infliximab. MATERIALS AND METHODS: Wrists, metacarpophalangeal (MCP) joints, and proximal interphalangeal (PIP) joints in 11 patients with active RA were assessed before and 6 weeks after three infliximab infusions. US assessment was performed at a single site in the MCP and PIP joints and at two sites (radiocarpal and intercarpal) in the wrists. Twenty measurements were performed in the wrists; 110 measurements, in the MCP joints; and 103 measurements, in the PIP joints. Two wrists and seven PIP joints were excluded owing to complete joint destruction. US parameters (synovial thickness, number of US-positive joints [ie, with synovial thickness > or = 1 mm], cumulative synovial thickness index, and presence of Doppler signal) and clinical parameters (swollen joint count) were independently assessed and compared with baseline values by using the McNemar chi2 and paired Student t tests. RESULTS: After infliximab treatment, there was a significant decrease in the mean numbers of swollen and US-positive joints and in the cumulative synovial thickness (P <.05). The mean synovial thickness decreased in all joints swollen at baseline and in the MCP and PIP joints not swollen at baseline (P <.01). Change from baseline cumulative synovial thickness correlated significantly with change in disease activity score (r = 0.69, P <.05). The number of positive Doppler US signals decreased significantly (in 13 US-positive joints at baseline, in five after treatment; P <.05). CONCLUSION: US is a feasible imaging modality for measurement of the response of RA small-joint synovitis to therapy. [less ▲]

Le Rhin des Césars. Frontière d'empire et source de pouvoir

Conference (2011, April 29)

Les frontières de l’empire romain, et la frontière du Rhin en particulier, ont retenu l’attention de nombreux historiens et archéologues. Cette communication revient sur les débats, parfois vifs, à propos ... [more ▼]

Les frontières de l’empire romain, et la frontière du Rhin en particulier, ont retenu l’attention de nombreux historiens et archéologues. Cette communication revient sur les débats, parfois vifs, à propos du limes et montre que l’étude des fortifications militaires ne doit pas être négligée, mais s’inscrire dans une analyse plus large de la culture politique romaine. Dans un second temps, la lecture socio-économique des rapports entre les Romains et les Barbares, proposée par Charles Richard Whittaker, est revue et complétée à la lumière des travaux plus récents de Michael Erdrich, Peter S. Wells et Marjan C. Galestin. La dernière partie de l’exposé, consacrée à la question de l’ethnogenèse s’appuie sur les recherches de Brian Ferguson et de Neil Whitehead pour montrer le rôle déterminant de la frontière dans le processus de (trans)formation des « peuples barbares ». [less ▲]

Rhino vs paquebot: 1-0

Article for general public (2012)

La rhinotrachéite infectieuse bovine : caractéristiques du virus, l'infection et ses manifestations cliniques

in Bulletin des Groupements Techniques Vétérinaires (1997), 568

Rhizobacterial volatile organic compounds modulate biomass production and root architecture in Arabidopsis thaliana (L.) Heynh. and Brachypodium distachyon (L.) P. Beauv.

Poster (2011, October)

Rhizosphere-driven lipopeptide production by different strains of Bacillus spp. as mechanism involved in biological control of plant pathogens

Doctoral thesis (2011)

Some plant-beneficial bacteria with biopesticide potential produce antimicrobial compounds that are tightly involved in multitrophic interactions occurring in the phytosphere among which antagonism toward ... [more ▼]

Some plant-beneficial bacteria with biopesticide potential produce antimicrobial compounds that are tightly involved in multitrophic interactions occurring in the phytosphere among which antagonism toward a diverse range of phytopathogens. However, there is a crucial need for an accurate assessment of antibiotic production rate in this environment colonized by these bacteria. In this context, we conducted the present thesis work with the scope to better understand how two different Bacillus genus strains produce lipopeptides in the rhizosphere of plants. In the first part, one of the strains (B. amyloliquefaciens S499) was selected out of other isolates for its technological traits and in vitro inhibition growth activity of plant pathogenic fungi. We further demonstrated its biocontrol potential in tomato open-field experiments where plantings have been devastated by a local fungus preliminary identified as Fusarium semitectum. In a second part, we combined two mass spectrometry-based approaches (electrospray ionization and imaging) to analyze the pattern of surfactin, iturin and fengycin lipopeptide families produced in planta by strain S499. Our results show that rhizosphere conditions are conducive for surfactin synthesis but not for other types of lipopeptides and that the lipopeptide pattern can be markedly influenced by nutritional factors, biofilm formation and oxygen availability. In a last part, surfactin gene expression (srfA) level was evaluated in situ on tomato root using the reporter gene (LacZ) inserted in B. subtilis strain BGS3. Results showed effective expression of srfA and production of surfactin in biologically important level quantities upon establishment of bacterial population on roots. Our results also demonstrate that BGS3 developing in colonies, efficiently utilizes the main substrates from plant exudates to produce surfactins. The production may also be favored in bacteria growing slowly in the rhizosphere. Globally, this work contributes to better appreciate the impact of some environmental factors on the in situ biosynthesis of lipopeptides by strains of Bacillus which is probably an essential step for improving the level and reliability of their efficacy as biological agents for the control of plant diseases. [less ▲]

RhoA inhibition is a key step in pituicyte stellation induced by A(1)-type adenosine receptor activation.

in Glia (2002), 38(4), 351-62

Pituicyte stellation in vitro represents a useful model with which to study morphological changes that occur in vivo in these cells during times of high neurohypophysial hormone output. This model has ... [more ▼]

Pituicyte stellation in vitro represents a useful model with which to study morphological changes that occur in vivo in these cells during times of high neurohypophysial hormone output. This model has helped us establish the hypothesis of a purinergic regulation of pituicyte morphological plasticity. We first show that ATP induces stellation in 37% of pituicytes, an effect that is secondary to the metabolism of ATP to adenosine. Adenosine-induced stellation of pituicytes appears to be mediated by A(1)-type receptors. The effect is independent of intracellular calcium and does not involve the mitogen-activated protein kinase pathway. The basal (nonstellate) state of pituicytes depends on tonic activation of a Rho GTPase because both C3 transferase (a Rho inhibitor) and Y-27632 (an inhibitor of p160Rho kinase) can induce stellation. Lysophosphatidic acid, a Rho activator, blocks the morphogenic effect of adenosine dose-dependently. Using a specific RhoA pull-down assay, we also show that downregulation of activated RhoA is the key event coupling A(1) receptor activation to pituicyte stellation, via F-actin depolymerization and microtubule reorganization. Finally, both vasopressin and oxytocin can prevent or reverse adenosine-induced stellation. The effects of vasopressin, and those of high concentrations of oxytocin, are mediated through V(1a) receptors. Placed within the context of the relevant literature, our data suggest the possibility of a purinergic regulation of pituicyte morphological plasticity and subsequent modulation of hormone release, with these hormones providing a negative feedback mechanism. [less ▲]