Philippe JEAN-PIERRE

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2007
• Auteurs : Jérôme GrévyBruno BéthouartAlbert RouetPhilippe BlaudeauMichel RoucheMichel FauquierThomas DeswarteFrédéric-Pierre ChanutFabrice VigierGérard PelletierJean ChaunuJean-Louis ClémentArnould de La BrosseFrançois ArsLudovic LalouxFrédéric Le MoigneJasques BouquetBruno MartinFrançois GondrandEtienne ThéveninKlaus Grosse KrachtXavier Boniface
• Organismes : Centre de recherches interdisciplinaires en histoire, histoire de l'art et musicologie [EA 4270] Unité de recherche sur l'histoire, les langues, les littératures et l'interculturel Cultures, Arts, Littératures, Histoire, Imaginaires, Sociétés, Territoires, Environnement - EA 4343

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Marie-Estelle GouzeJoëlle LaffittePhilippe PintonGeneviève DedieuxAnne GalinierJean-Paul ThouvenotNicolas LoiseauIsabelle P. OswaldPierre Galtier
• Organismes :
• Publié dans Veterinary Research le 26/10/2020

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Résumé : Nivalenol (NIV) is a toxic Fusarium secondary trichothecene metabolite occurring naturally in cereal grains. In order to evaluate the no observed adverse effect level (NOAEL), we tested the effects of a large array of oral doses of this toxin for responses on plasma biochemistry, the immune system and hepatic drug metabolism in mice. C57Bl6 mice received oral doses of toxin (0.014, 0.071, 0.355, 1.774 or 8.87 mg/kg bw) 3 days a week for 4 weeks. Only the highest dose of NIV induced an increase in plasma phosphate, decreases in plasma urea and immunoglobulin M and additional changes like increases in plasma alkaline phosphatase and immunoglobulin G. Interleukin 4 production was increased in cultured murine splenocytes. Regarding liver drug metabolising enzymes, the only glutathione transferase activity accepting 1-chloro-2,4-dinitro-benzene as substrate was transiently increased in mice receiving low doses (0.071 and 0.355 mg/kg bw) of NIV. Regarding the cytochrome P450 monooxygenases, no significant change was observed in ethoxyresorufin $O$-deethylase activity whereas both methoxyresorufin and pentoxyresorufin $O$-dealkylase activities were decreased by 38-45% for the highest dose (8.87 mg/kg bw) of NIV. However, when analysed by Western blot analysis, the protein expression of mouse P450 1a, 2b, 2c, 3a and 4a subfamilies was unchanged in animals receiving NIV. In conclusion, the NOAEL of this toxin in our study was 1.774 mg/kg bw, corresponding to an exposure to 5 ppm contaminated food. Indeed hepatotoxicity appears in the only mice treated with a five fold higher oral dose of 8.87 mg/kg bw of NIV. Such exposure levels appear to be by far higher than the maximal natural occurrence measured in European cereals, known to range from 0.34 to 1.86 ppm.

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Fichiers liés : hal-00902889.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Daniel R. ThevenotR. MoilleronLaurence LestelMarie-Christine GromaireVincent RocherPhilippe CambierPhilippe BontéJean-Louis ColinClaire de PontevèsMichel Meybeck
• Organismes : Centre d'Enseignement et de Recherche Eau Ville Environnement Centre d'Enseignement et de Recherche Eau Ville Environnement Centre d'histoire des techniques et de l'environnement Centre d'Enseignement et de Recherche Eau Ville Environnement Direction de la Recherche et du Développement Unité de Sciences du Sol Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] Géochimie Des Impacts Laboratoire Interuniversitaire des Systèmes Atmosphériques Structure et fonctionnement des systèmes hydriques continentaux Structure et fonctionnement des systèmes hydriques continentaux
• Publié dans Science of the Total Environment le 29/10/2020

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Résumé : River basin metal pollution originates from heavy industries (plating, automobile) and from urban sources (Paris conurbation: 2740 km2 , 9.47 million inhabitants). The natural sources of metal have been found to be limited due to sedimentary nature of this catchment and to the very low river sediment transport (10 t km − 2 y − 1). Several types of data have been collected to build the metal budget within the whole Seine River basin: field surveys, economical statistics and environmental models. Environmental contamination and related fluxes have been measured on atmospheric fallout, rural streams particles, and Seine River particles upstream and downstream of Paris and at river mouth. Metal pathways and budgets have been set up for (i) a typical cultivated area, (ii) a Paris combined sewer system, (iii) Paris conurbation and (iv) the whole catchment metal retention effect in floodplain and dredged material. Metal fluxes to the estuary have been decomposed into natural, urban domestic and other sources. The latter are within 1–2 orders of magnitude larger than waste water fluxes directly released into rivers according to an industrial census. These fluxes have been further compared to the annual use (1994–2003) of these metals. Metal excess fluxes exported by the river are now a marginal leak of metal inputs to the catchment (i.e. "raw" metals, metals in goods, atmospheric fallout), generally from 0.2 to 5‰. However, due to the very limited dilution power in this basin, the contamination of particles is still relatively high. The Seine River basin is gradually storing metals, mostly in manufactured products used in construction, but also in various waste dumps, industrial soils, agricultural and flood plain soils.

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Fichiers liés : Thevenot-STOTEN-Critical-Budget-2007-375-180-203.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Hervé SinoquetJean StephanGabriel SonohatPierre-Éric LauriPhilippe Monney
• Organismes : Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier Ecole Nationale d'Ingénieurs des Travaux Agricoles de Clermont-Ferrand Développement et amélioration des plantes Centre de Fougères
• Publié dans New Phytologist le 01/11/2020

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Résumé : Simple models of light interception are useful to identify the key structural parameters involved in light capture. We developed such models for isolated trees and tested them with virtual experiments. Light interception was decomposed into the projection of the crown envelope and the crown porosity. The latter was related to tree structure parameters. Virtual experiments were conducted with three-dimensional (3-D) digitized apple trees grown in Lebanon and Switzerland, with different cultivars and training. The digitized trees allowed actual values of canopy structure (total leaf area, crown volume, foliage inclination angle, variance of leaf area density) and light interception properties (projected leaf area, silhouette to total area ratio, porosity, dispersion parameters) to be computed, and relationships between structure and interception variables to be derived. The projected envelope area was related to crown volume with a power function of exponent 2/3. Crown porosity was a negative exponential function of mean optical density, that is, the ratio between total leaf area and the projected envelope area. The leaf dispersion parameter was a negative linear function of the relative variance of leaf area density in the crown volume. The resulting models were expressed as two single equations. After calibration, model outputs were very close to values computed from the 3-D digitized databases.

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Valérie EminJean-Philippe PerninMichèle PrieurEric Sanchez
• Organismes : Modèles et Technologies pour l’Apprentissage Humain Modèles et Technologies pour l’Apprentissage Humain Institut National de Recherche Pédagogique Institut National de Recherche Pédagogique
• Publié dans International Journal of Technologies in Higher Education le 06/12/2007

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Résumé : no abstract

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• Type de publi. : Ouvrage (y compris édition critique et traduction)
• Date de publi. : 01/01/2007
• Auteurs : Benoît ClavelCorinne Feïss-JehelJean Olivier GuilhotPierre-Jérôme JehelSandrine MounyJean-Michel MoutonClaudine PiatonPhilippe Racinet
• Organismes : Muséum national d'Histoire naturelle École Pratique des Hautes Études PROCLAC - Proche-Orient—Caucase : langues, archéologie, cultures Ministère de la Culture GOBELINS Paris Textes, Représentations, Archéologie, Autorité et Mémoire de l'Antiquité à la Renaissance - UR UPJV 4284 PROCLAC - Proche-Orient—Caucase : langues, archéologie, cultures L'information visuelle et textuelle en histoire de l'art : nouveaux terrains, corpus, outils Textes, Représentations, Archéologie, Autorité et Mémoire de l'Antiquité à la Renaissance - UR UPJV 4284

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Julie LeloupZouhair LachkarJean-Philippe BoulangerSylvie Thiria
• Organismes : Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
• Publié dans Climate Dynamics le 30/10/2020

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2007
• Auteurs : Jean CorneloupPhilippe BourdeauPascal Mao
• Organismes : Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales

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• Type de publi. : Chapître d'ouvrage
• Date de publi. : 01/01/2007
• Auteurs : Jean CorneloupPhilippe BourdeauPascal Mao
• Organismes : Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales Pacte, Laboratoire de sciences sociales

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• Type de publi. : Article dans une revue
• Date de publi. : 01/01/2007
• Auteurs : Géraldine GuerriLyu AbeEric AristidiJean-Baptiste DabanJean-Pierre RivetPhilippe BendjoyaFarrokh VakiliAbdelkrim Agabi
• Organismes : Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau Laboratoire Hippolyte Fizeau
• Publié dans EAS Publications Series le 01/11/2020

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Résumé : We present the results of the first light of CORONA obtained during the summer campaign 2005 at Dome C. The CORONA experiment uses an automated 14'' antarctized telescope for its remote operation from the Concordia station. The instrument includes an Achromatized Phase Knife Coronagraph (APKC) with no tip-tilt correction. The high contrast long exposure is obtained from image selection among raw short exposures.

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Fichiers liés : Guerri2007.pdf

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