Mostrando recursos 81 - 100 de 4.564

  1. Elfe. Une base de données pour caractériser les émissions gazeuses

    Vigan, Aurore; Guingand, Nadine; Espagnol, Sandrine; Hassouna, Melynda; Lorinquer, Elise; Ponchant, Paul; Lagadec, Solène; Brame, Coline; Edouard, Nadège; Genermont, Sophie; Loyon, Laurence; Eugène, Maguy; Klumpp, Katja; Fiorelli, Jean-Louis; Mathias, Etienne; Legall, Cécile; Cohan, Jean-Pierrre; Eglin, Thomas; Robin, Paul
    Elfe. Une base de données pour caractériser les émissions gazeuses. International Symposium on Emissions of Gas and Dust from Livestock (EmiLi)

  2. Nonstructural protein NSs of Schmallenberg virus Is targeted to the nucleolus and induces nucleolar disorganization

    GOUZIL, Julie; Fablet, Aurore; Lara, Estelle; caignard, Grégory; Cochet, Marielle; KUNDLACZ, Cindy; Palmarini, Massimo; Varela, Mariana; Bréard, Emmanuel; Sailleau, Corinne; Viarouge, Cyril; Coulpier, Muriel; Zientara, Stephan; VITOUR, Damien
    Schmallenberg virus (SBV) was discovered in Germany in late 2011 and then spread rapidly to many European countries. SBV is an orthobunyavirus that causes abortion and congenital abnormalities in ruminants. A virus-encoded nonstructural protein, termed NSs, is a major virulence factor of SBV, and it is known to promote the degradation of Rpb1, a subunit of the RNA polymerase II (Pol II) complex, and therefore hampers global cellular transcription. In this study, we found that NSs is mainly localized in the nucleus of infected cells and specifically appears to target the nucleolus through a nucleolar localization signal (NoLS) localized between...

  3. Insight into the genome of staphylococcus xylosus, a ubiquitous species well adapted to meat products

    Leroy, Sabine; Vermassen, Aurore; Ras, Geoffrey; Talon, Régine
    Staphylococcus xylosus belongs to the vast group of coagulase-negative staphylococci. It is frequently isolated from meat products, either fermented or salted and dried, and is commonly used as starter cultures in sausage manufacturing. Analysis of the S. xylosus genome together with expression in situ in a meat model revealed that this bacterium is well adapted to meat substrates, being able to use diverse substrates as sources of carbon and energy and different sources of nitrogen. It is well-equipped with genes involved in osmotic, oxidative/nitrosative, and acidic stress responses. It is responsible for the development of the typical colour of cured...

  4. Une base de données pour caractériser les émissions gazeuses

    Vigan, Aurore; Ponchant, Paul; Guingand, Nadine; Espagnol, Sandrine; Hassouna, Melynda; Lorinquer, Elise; Lagadec, Solène; Brame, Coline; Edouard, Nadège; Genermont, Sophie; Loyon, Laurence; Eugène, Maguy; Klumpp, Katja; Fiorelli, Jean-Louis; Mathias, Etienne; Legall, Cécile; Cohan, Jean-Pierrre; Eglin, Thomas; Robin, Paul

  5. Une base de données pour caractériser les émissions gazeuses

    Vigan, Aurore; Ponchant, Paul; Guingand, Nadine; Espagnol, Sandrine; Hassouna, Melynda; Lorinquer, Elise; Lagadec, Solène; Brame, Coline; Edouard, Nadège; Genermont, Sophie; Loyon, Laurence; Eugène, Maguy; Klumpp, Katja; Fiorelli, Jean-Louis; Mathias, Etienne; Legall, Cécile; Cohan, Jean-Pierrre; Eglin, Thomas; Robin, Paul

  6. Une base de données pour caractériser les émissions gazeuses

    Vigan, Aurore; Ponchant, Paul; Guingand, Nadine; Espagnol, Sandrine; Hassouna, Melynda; Lorinquer, Elise; Lagadec, Solène; Brame, Coline; Edouard, Nadège; Genermont, Sophie; Loyon, Laurence; Eugène, Maguy; Klumpp, Katja; Fiorelli, Jean-Louis; Mathias, Etienne; Legall, Cécile; Cohan, Jean-Pierrre; Eglin, Thomas; Robin, Paul

  7. The interaction of soil phototrophs and fungi with pH and their impact on soil CO 2 , CO 18 O and OCS exchange

    Sauze, Joana; Ogée, Jérôme; Maron, Pierre-Alain; Crouzet, Olivier; Nowak, Virginie; Wohl, Steven; Kaisermann, Aurore; Jones, Samuel; Wingate, Lisa
    The stable oxygen isotope composition of atmospheric CO2 and the mixing ratio of carbonyl sulphide (OCS) are potential tracers of biospheric CO2 fluxes at large scales. However, the use of these tracers hinges on our ability to understand and better predict the activity of the enzyme carbonic anhydrase (CA) in different soil microbial groups, including phototrophs. Because different classes of the CA family (α, β and γ) may have different affinities to CO2 and OCS and their expression should also vary between different microbial groups, differences in the community structure could impact the ‘community-integrated’ CA activity differently for CO2 and...

  8. The interaction of soil phototrophs and fungi with pH and their impact on soil CO 2 , CO 18 O and OCS exchange

    Sauze, Joana; Ogée, Jérôme; Maron, Pierre-Alain; Crouzet, Olivier; Nowak, Virginie; Wohl, Steven; Kaisermann, Aurore; Jones, Samuel; Wingate, Lisa
    The stable oxygen isotope composition of atmospheric CO2 and the mixing ratio of carbonyl sulphide (OCS) are potential tracers of biospheric CO2 fluxes at large scales. However, the use of these tracers hinges on our ability to understand and better predict the activity of the enzyme carbonic anhydrase (CA) in different soil microbial groups, including phototrophs. Because different classes of the CA family (α, β and γ) may have different affinities to CO2 and OCS and their expression should also vary between different microbial groups, differences in the community structure could impact the ‘community-integrated’ CA activity differently for CO2 and...

  9. The interaction of soil phototrophs and fungi with pH and their impact on soil CO 2 , CO 18 O and OCS exchange

    Sauze, Joana; Ogée, Jérôme; Maron, Pierre-Alain; Crouzet, Olivier; Nowak, Virginie; Wohl, Steven; Kaisermann, Aurore; Jones, Samuel; Wingate, Lisa
    The stable oxygen isotope composition of atmospheric CO2 and the mixing ratio of carbonyl sulphide (OCS) are potential tracers of biospheric CO2 fluxes at large scales. However, the use of these tracers hinges on our ability to understand and better predict the activity of the enzyme carbonic anhydrase (CA) in different soil microbial groups, including phototrophs. Because different classes of the CA family (α, β and γ) may have different affinities to CO2 and OCS and their expression should also vary between different microbial groups, differences in the community structure could impact the ‘community-integrated’ CA activity differently for CO2 and...

  10. Legacy effects of drought on plant-soil feedbacks and plant-plant interactions

    Kaisermann, Aurore; de Vries, Franciska T.; Griffiths, Robert I.; Bardgett, Richard D.
    - Interactions between aboveground and belowground biota have the potential to modify ecosystem responses to climate change, yet little is known about how drought influences plant–soil feedbacks with respect to microbial mediation of plant community dynamics.- We tested the hypothesis that drought modifies plant–soil feedback with consequences for plant competition. We measured net pairwise plant–soil feedbacks for two grassland plant species grown in monoculture and competition in soils that had or had not been subjected to a previous drought; these were then exposed to a subsequent drought. To investigate the mechanisms involved, we assessed treatment responses of soil microbial communities...

  11. Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

    Loizeau, Sebastien; Rossier, Yvan; Gaudet, Jean-Paul; Refloch, Aurore; BESNARD, Katia; Angulo-Jaramillo, Rafael; Lassabatere, Laurent
    Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease in water infiltration in relation with clogging. However, miss-estimations of infiltration rate may result from neglecting the effects of water temperature change and air-entrapment. This study aims to investigate the effect of temperature and air entrapment on water infiltration at the basin scale by conducting successive infiltration cycles in an experimental basin of 11869 m(2) in a pumping field at Crepieux-Charmy (Lyon, France). A first experiment, conducted in summer 2011, showed a strong increase in infiltration rate;...

  12. Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

    Loizeau, Sebastien; Rossier, Yvan; Gaudet, Jean-Paul; Refloch, Aurore; BESNARD, Katia; Angulo-Jaramillo, Rafael; Lassabatere, Laurent
    Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease in water infiltration in relation with clogging. However, miss-estimations of infiltration rate may result from neglecting the effects of water temperature change and air-entrapment. This study aims to investigate the effect of temperature and air entrapment on water infiltration at the basin scale by conducting successive infiltration cycles in an experimental basin of 11869 m(2) in a pumping field at Crepieux-Charmy (Lyon, France). A first experiment, conducted in summer 2011, showed a strong increase in infiltration rate;...

  13. Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

    Loizeau, Sebastien; Rossier, Yvan; Gaudet, Jean-Paul; Refloch, Aurore; BESNARD, Katia; Angulo-Jaramillo, Rafael; Lassabatere, Laurent
    Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease in water infiltration in relation with clogging. However, miss-estimations of infiltration rate may result from neglecting the effects of water temperature change and air-entrapment. This study aims to investigate the effect of temperature and air entrapment on water infiltration at the basin scale by conducting successive infiltration cycles in an experimental basin of 11869 m(2) in a pumping field at Crepieux-Charmy (Lyon, France). A first experiment, conducted in summer 2011, showed a strong increase in infiltration rate;...

  14. The Influenza Virus Protein PB1-F2 Increases Viral Pathogenesis through Neutrophil Recruitment and NK Cells Inhibition

    Vidy-Roche, Aurore; Maisonnasse, Pauline; Da Costa, Bruno; Delmas, Bernard; Chevalier, Christophe; Le Goffic, Ronan
    The influenza A virus (IAV) PB1-F2 protein is a virulence factor contributing to the pathogenesis observed during IAV infections in mammals. In this study, using a mouse model, we compared the host response associated with PB1-F2 with an early transcriptomic signature that was previously associated with neutrophils and consecutively fatal IAV infections. This allowed us to show that PB1-F2 is partly involved in neutrophil-related mechanisms leading to death. Using neutropenic mice, we confirmed that the harmful effect of PB1-F2 is due to an excessive inflammation mediated by an increased neutrophil mobilization. We identified the downstream effects of this PB1-F2-exacerbated neutrophil...

  15. The Influenza Virus Protein PB1-F2 Increases Viral Pathogenesis through Neutrophil Recruitment and NK Cells Inhibition

    Vidy-Roche, Aurore; Maisonnasse, Pauline; Da Costa, Bruno; Delmas, Bernard; Chevalier, Christophe; Le Goffic, Ronan
    The influenza A virus (IAV) PB1-F2 protein is a virulence factor contributing to the pathogenesis observed during IAV infections in mammals. In this study, using a mouse model, we compared the host response associated with PB1-F2 with an early transcriptomic signature that was previously associated with neutrophils and consecutively fatal IAV infections. This allowed us to show that PB1-F2 is partly involved in neutrophil-related mechanisms leading to death. Using neutropenic mice, we confirmed that the harmful effect of PB1-F2 is due to an excessive inflammation mediated by an increased neutrophil mobilization. We identified the downstream effects of this PB1-F2-exacerbated neutrophil...

  16. The Influenza Virus Protein PB1-F2 Increases Viral Pathogenesis through Neutrophil Recruitment and NK Cells Inhibition

    Vidy-Roche, Aurore; Maisonnasse, Pauline; Da Costa, Bruno; Delmas, Bernard; Chevalier, Christophe; Le Goffic, Ronan
    The influenza A virus (IAV) PB1-F2 protein is a virulence factor contributing to the pathogenesis observed during IAV infections in mammals. In this study, using a mouse model, we compared the host response associated with PB1-F2 with an early transcriptomic signature that was previously associated with neutrophils and consecutively fatal IAV infections. This allowed us to show that PB1-F2 is partly involved in neutrophil-related mechanisms leading to death. Using neutropenic mice, we confirmed that the harmful effect of PB1-F2 is due to an excessive inflammation mediated by an increased neutrophil mobilization. We identified the downstream effects of this PB1-F2-exacerbated neutrophil...

  17. La mobilité des systèmes d’élevage ovins utilisateurs d’une grande variété de ressources pâturées en Provence : impacts sur le bilan énergétique et les émissions de méthane

    Lasseur, Jacques; Benoit, Marc; Vigan, Aurore; Eugène, Maguy; Mouillot, Florent; Mansard, Laura; Garde, Laurent; Girard, Nathalie; Vigne, Mathieu; Lecomte, Philippe; Dutilly, Céline
    La mobilité des systèmes d’élevage ovins utilisateurs d’une grande variété de ressources pâturées en Provence : impacts sur le bilan énergétique et les émissions de méthane. Réseau prairies – Symposium 2017

  18. La mobilité des systèmes d’élevage ovins utilisateurs d’une grande variété de ressources pâturées en Provence : impacts sur le bilan énergétique et les émissions de méthane

    Lasseur, Jacques; Benoit, Marc; Vigan, Aurore; Eugène, Maguy; Mouillot, Florent; Mansard, Laura; Garde, Laurent; Girard, Nathalie; Vigne, Mathieu; Lecomte, Philippe; Dutilly, Céline
    La mobilité des systèmes d’élevage ovins utilisateurs d’une grande variété de ressources pâturées en Provence : impacts sur le bilan énergétique et les émissions de méthane. Réseau prairies – Symposium 2017

  19. Impact of oral bisphenol A at reference doses on intestinal barrier function and sex differences after perinatal exposure in rats

    Braniste, Viorica; Jouault, Aurore; Gaultier, Eric; Polizzi, Arnaud; Buisson, Claire; Leveque, Mathilde; Martin, Pascal G.; Theodorou, Vassilia; FIORAMONTI, Jean; Houdeau, Eric
    Bisphenol A (BPA), a chemical estrogen widely used in the foodpackaging industry and baby bottles, is recovered in human fluids (0.1–10 nM). Recent studies have reported that BPA is hormonally active at low doses, emphasizing the debate of a risk for human health. Estrogen receptors are expressed in the colon, and although the major route of BPA exposure is food, the effects on gut have received no attention. We first examined the endocrine disrupting potency of BPA on colonic paracellular permeability (CPP), experimental colitis, and visceral sensitivity in ovariectomized rats orally exposed to 5mg/kg/d BPA(i.e., the noobserved adverse effect level),...

  20. Impact of oral bisphenol A at reference doses on intestinal barrier function and sex differences after perinatal exposure in rats

    Braniste, Viorica; Jouault, Aurore; Gaultier, Eric; Polizzi, Arnaud; Buisson, Claire; Leveque, Mathilde; Martin, Pascal G.; Theodorou, Vassilia; FIORAMONTI, Jean; Houdeau, Eric
    Bisphenol A (BPA), a chemical estrogen widely used in the foodpackaging industry and baby bottles, is recovered in human fluids (0.1–10 nM). Recent studies have reported that BPA is hormonally active at low doses, emphasizing the debate of a risk for human health. Estrogen receptors are expressed in the colon, and although the major route of BPA exposure is food, the effects on gut have received no attention. We first examined the endocrine disrupting potency of BPA on colonic paracellular permeability (CPP), experimental colitis, and visceral sensitivity in ovariectomized rats orally exposed to 5mg/kg/d BPA(i.e., the noobserved adverse effect level),...

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