1. Receptor-mediated exopolysaccharide perception controls bacterial infection.

    Nature 523(7560):308 (2015) PMID 26153863

    Surface polysaccharides are important for bacterial interactions with multicellular organisms, and some are virulence factors in pathogens. In the legume-rhizobium symbiosis, bacterial exopolysaccharides (EPS) are essential for the development of infected root nodules. We have identified a gene ...
  2. Heterogeneous accretion and the moderately volatile element budget of Earth.

    Science 328(5980):884 (2010) PMID 20466929

    Several models exist to describe the growth and evolution of Earth; however, variables such as the type of precursor materials, extent of mixing, and material loss during accretion are poorly constrained. High-precision palladium-silver isotope data show that Earth's mantle is similar in 107Ag/1...
  3. Heterogeneous accretion and the moderately volatile element budget of Earth.

    Science 328(5980):884 (2010) PMID 20466929

    Several models exist to describe the growth and evolution of Earth; however, variables such as the type of precursor materials, extent of mixing, and material loss during accretion are poorly constrained. High-precision palladium-silver isotope data show that Earth's mantle is similar in 107Ag/1...
  4. Chemical composition of lipopolysaccharides isolated from various endophytic nitrogen-fixing bacteria of the genus Herbaspirillum.

    Canadian Journal of Microbiology/Revue Canadien... 56(4):342 (2010) PMID 20453901

    Bacteria from the genus Herbaspirillum are endophytes responsible for nitrogen fixation in gramineous plants of economic importance such as maize, sugarcane, sorghum, rice, and wheat. Some species are known to produce plant growth substances. In contrast, Herbaspirillum rubrisubalbicans strains ...
  5. Chemical composition of lipopolysaccharides isolated from various endophytic nitrogen-fixing bacteria of the genus Herbaspirillum.

    Canadian Journal of Microbiology/Revue Canadien... 56(4):342 (2010) PMID 20453901

    Bacteria from the genus Herbaspirillum are endophytes responsible for nitrogen fixation in gramineous plants of economic importance such as maize, sugarcane, sorghum, rice, and wheat. Some species are known to produce plant growth substances. In contrast, Herbaspirillum rubrisubalbicans strains ...
  6. A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express.
    P Drossart, G Piccioni, J C Gérard, M A Lopez-Valverde, A Sanchez-Lavega, L Zasova, R Hueso, F W Taylor, Bézard, Adriani, F Angrilli, G Arnold, K H Baines, G Bellucci, J Benkhoff, J P Bibring, A Blanco, M I Blecka, R W Carlson, A Coradini, A Di Lellis, T Encrenaz, S Erard, S Fonti, V Formisano, T Fouchet, R Garcia, R Haus, J Helbert, N Ignatiev, P Irwin, Y Langevin, S Lebonnois, D Luz, L Marinangeli, V Orofino, A V Rodin, M C Roos-Serote, B Saggin, D M Stam, D Titov, G Visconti, M Zambelli, C Tsang, Eleonora Ammannito, Alessandra Barbis, Rainer Berlin, Carlo Bettanini, Angelo Boccaccini, Guillaume Bonnello, Marc Bouyé, Fabrizio Capaccioni, Alejandro Cardesin, Francesco Carraro, Giovanni Cherubini, Massimo Cosi, Michele Dami, Maurizio De Nino, Davide Del Vento, Marco Di Giampietro, Alessandro Donati, Olivier Dupuis, Sylvie Espinasse, Anna Fabbri, Agnès Fave, Iacopo Ficai Veltroni, Gianrico Filacchione, Katia Garceran, Yamina Ghomchi, Maurizio Giustizi, Brigitte Gondet, Yann Hello, Florence Henry, Stefan Hofer, Gerard Huntzinger, Juergen Kachlicki, René Knoll, Driss Kouach, Alessandro Mazzoni, Riccardo Melchiorri, Giuseppe Mondello, Francesco Monti, Christian Neumann, Fabrizio Nuccilli, Jérôme Parisot, Claudio Pasqui, Stefano Perferi, Gisbert Peter, Alain Piacentino, Carlo Pompei, Jean-Michel Réess, Jean-Pierre Rivet, Antonio Romano, Natalie Russ, Massimo Santoni, Adelmo Scarpelli, Alain Sémery, Alain Soufflot, Douchane Stefanovitch, Enrico Suetta, Fabio Tarchi, Nazzareno Tonetti, Federico Tosi, and Bernd Ulmer

    Nature 450(7170):641 (2007) PMID 18046396

    The upper atmosphere of a planet is a transition region in which energy is transferred between the deeper atmosphere and outer space. Molecular emissions from the upper atmosphere (90-120 km altitude) of Venus can be used to investigate the energetics and to trace the circulation of this hithert...
  7. A dynamic upper atmosphere of Venus as revealed by VIRTIS on Venus Express.
    P Drossart, G Piccioni, J C Gérard, M A Lopez-Valverde, A Sanchez-Lavega, L Zasova, R Hueso, F W Taylor, Bézard, Adriani, F Angrilli, G Arnold, K H Baines, G Bellucci, J Benkhoff, J P Bibring, A Blanco, M I Blecka, R W Carlson, A Coradini, A Di Lellis, T Encrenaz, S Erard, S Fonti, V Formisano, T Fouchet, R Garcia, R Haus, J Helbert, N Ignatiev, P Irwin, Y Langevin, S Lebonnois, D Luz, L Marinangeli, V Orofino, A V Rodin, M C Roos-Serote, B Saggin, D M Stam, D Titov, G Visconti, M Zambelli, C Tsang, Eleonora Ammannito, Alessandra Barbis, Rainer Berlin, Carlo Bettanini, Angelo Boccaccini, Guillaume Bonnello, Marc Bouyé, Fabrizio Capaccioni, Alejandro Cardesin, Francesco Carraro, Giovanni Cherubini, Massimo Cosi, Michele Dami, Maurizio De Nino, Davide Del Vento, Marco Di Giampietro, Alessandro Donati, Olivier Dupuis, Sylvie Espinasse, Anna Fabbri, Agnès Fave, Iacopo Ficai Veltroni, Gianrico Filacchione, Katia Garceran, Yamina Ghomchi, Maurizio Giustizi, Brigitte Gondet, Yann Hello, Florence Henry, Stefan Hofer, Gerard Huntzinger, Juergen Kachlicki, René Knoll, Driss Kouach, Alessandro Mazzoni, Riccardo Melchiorri, Giuseppe Mondello, Francesco Monti, Christian Neumann, Fabrizio Nuccilli, Jérôme Parisot, Claudio Pasqui, Stefano Perferi, Gisbert Peter, Alain Piacentino, Carlo Pompei, Jean-Michel Réess, Jean-Pierre Rivet, Antonio Romano, Natalie Russ, Massimo Santoni, Adelmo Scarpelli, Alain Sémery, Alain Soufflot, Douchane Stefanovitch, Enrico Suetta, Fabio Tarchi, Nazzareno Tonetti, Federico Tosi, and Bernd Ulmer

    Nature 450(7170):641 (2007) PMID 18046396

    The upper atmosphere of a planet is a transition region in which energy is transferred between the deeper atmosphere and outer space. Molecular emissions from the upper atmosphere (90-120 km altitude) of Venus can be used to investigate the energetics and to trace the circulation of this hithert...
  8. South-polar features on Venus similar to those near the north pole.
    G Piccioni, P Drossart, A Sanchez-Lavega, R Hueso, F W Taylor, C F Wilson, D Grassi, L Zasova, Moriconi, Adriani, S Lebonnois, A Coradini, Bézard, F Angrilli, G Arnold, K H Baines, G Bellucci, J Benkhoff, J P Bibring, A Blanco, M I Blecka, R W Carlson, A Di Lellis, T Encrenaz, S Erard, S Fonti, V Formisano, T Fouchet, R Garcia, R Haus, J Helbert, N Ignatiev, P G J Irwin, Y Langevin, M A Lopez-Valverde, D Luz, L Marinangeli, V Orofino, A V Rodin, M C Roos-Serote, B Saggin, D M Stam, D Titov, G Visconti, M Zambelli, Eleonora Ammannito, Alessandra Barbis, Rainer Berlin, Carlo Bettanini, Angelo Boccaccini, Guillaume Bonnello, Marc Bouye, Fabrizio Capaccioni, Alejandro Cardesin Moinelo, Francesco Carraro, Giovanni Cherubini, Massimo Cosi, Michele Dami, Maurizio De Nino, Davide Del Vento, Marco Di Giampietro, Alessandro Donati, Olivier Dupuis, Sylvie Espinasse, Anna Fabbri, Agnes Fave, Iacopo Ficai Veltroni, Gianrico Filacchione, Katia Garceran, Yamina Ghomchi, Maurizio Giustini, Brigitte Gondet, Yann Hello, Florence Henry, Stefan Hofer, Gerard Huntzinger, Juergen Kachlicki, René Knoll, Kouach Driss, Alessandro Mazzoni, Riccardo Melchiorri, Giuseppe Mondello, Francesco Monti, Christian Neumann, Fabrizio Nuccilli, Jerome Parisot, Claudio Pasqui, Stefano Perferi, Gisbert Peter, Alain Piacentino, Carlo Pompei, Jean-Michel Reess, Jean-Pierre Rivet, Antonio Romano, Natalie Russ, Massimo Santoni, Adelmo Scarpelli, Alain Semery, Alain Soufflot, Douchane Stefanovitch, Enrico Suetta, Fabio Tarchi, Nazzareno Tonetti, Federico Tosi, and Bernd Ulmer

    Nature 450(7170):637 (2007) PMID 18046395

    Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright 'dipole' feature surrounded by a cold 'collar' at its north pole. The polar di...
  9. South-polar features on Venus similar to those near the north pole.
    G Piccioni, P Drossart, A Sanchez-Lavega, R Hueso, F W Taylor, C F Wilson, D Grassi, L Zasova, Moriconi, Adriani, S Lebonnois, A Coradini, Bézard, F Angrilli, G Arnold, K H Baines, G Bellucci, J Benkhoff, J P Bibring, A Blanco, M I Blecka, R W Carlson, A Di Lellis, T Encrenaz, S Erard, S Fonti, V Formisano, T Fouchet, R Garcia, R Haus, J Helbert, N Ignatiev, P G J Irwin, Y Langevin, M A Lopez-Valverde, D Luz, L Marinangeli, V Orofino, A V Rodin, M C Roos-Serote, B Saggin, D M Stam, D Titov, G Visconti, M Zambelli, Eleonora Ammannito, Alessandra Barbis, Rainer Berlin, Carlo Bettanini, Angelo Boccaccini, Guillaume Bonnello, Marc Bouye, Fabrizio Capaccioni, Alejandro Cardesin Moinelo, Francesco Carraro, Giovanni Cherubini, Massimo Cosi, Michele Dami, Maurizio De Nino, Davide Del Vento, Marco Di Giampietro, Alessandro Donati, Olivier Dupuis, Sylvie Espinasse, Anna Fabbri, Agnes Fave, Iacopo Ficai Veltroni, Gianrico Filacchione, Katia Garceran, Yamina Ghomchi, Maurizio Giustini, Brigitte Gondet, Yann Hello, Florence Henry, Stefan Hofer, Gerard Huntzinger, Juergen Kachlicki, René Knoll, Kouach Driss, Alessandro Mazzoni, Riccardo Melchiorri, Giuseppe Mondello, Francesco Monti, Christian Neumann, Fabrizio Nuccilli, Jerome Parisot, Claudio Pasqui, Stefano Perferi, Gisbert Peter, Alain Piacentino, Carlo Pompei, Jean-Michel Reess, Jean-Pierre Rivet, Antonio Romano, Natalie Russ, Massimo Santoni, Adelmo Scarpelli, Alain Semery, Alain Soufflot, Douchane Stefanovitch, Enrico Suetta, Fabio Tarchi, Nazzareno Tonetti, Federico Tosi, and Bernd Ulmer

    Nature 450(7170):637 (2007) PMID 18046395

    Venus has no seasons, slow rotation and a very massive atmosphere, which is mainly carbon dioxide with clouds primarily of sulphuric acid droplets. Infrared observations by previous missions to Venus revealed a bright 'dipole' feature surrounded by a cold 'collar' at its north pole. The polar di...
  10. 142Nd evidence for early (>4.53 Ga) global differentiation of the silicate Earth.

    Science 309(5734):576 (2005) PMID 15961629

    New high-precision samarium-neodymium isotopic data for chondritic meteorites show that their 142Nd/144Nd ratio is 20 parts per million lower than that of most terrestrial rocks. This difference indicates that most (70 to 95%) of Earth's mantle is compositionally similar to the incompatible elem...
  11. 142Nd evidence for early (>4.53 Ga) global differentiation of the silicate Earth.

    Science 309(5734):576 (2005) PMID 15961629

    New high-precision samarium-neodymium isotopic data for chondritic meteorites show that their 142Nd/144Nd ratio is 20 parts per million lower than that of most terrestrial rocks. This difference indicates that most (70 to 95%) of Earth's mantle is compositionally similar to the incompatible elem...
  12. Modulation of fluorouracil by leucovorin in patients with advanced colorectal cancer: an updated meta-analysis.

    Journal of Clinical Oncology 22(18):3766 (2004) PMID 15365073

    The modulation of fluorouracil (FU) by folinic acid (leucovorin [LV]) has been shown to be effective in terms of tumor response rate in patients with advanced colorectal cancer, but a meta-analysis of nine trials previously published by our group failed to demonstrate a statistically significant...
  13. Modulation of fluorouracil by leucovorin in patients with advanced colorectal cancer: an updated meta-analysis.

    Journal of Clinical Oncology 22(18):3766 (2004) PMID 15365073

    The modulation of fluorouracil (FU) by folinic acid (leucovorin [LV]) has been shown to be effective in terms of tumor response rate in patients with advanced colorectal cancer, but a meta-analysis of nine trials previously published by our group failed to demonstrate a statistically significant...
  14. Three genes encoding for putative methyl- and acetyltransferases map adjacent to the wzm and wzt genes and are essential for O-antigen biosynthesis in Rhizobium etli CE3.

    Molecular Plant-Microbe Interactions 16(12):1085 (2003) PMID 14651342

    The elucidation of the structure of the O-antigen of Rhizobium etli CE3 predicts that the R. etli CE3 genome must contain genes encoding acetyl- and methyltransferases to confer the corresponding modifications to the O-antigen. We identified three open reading frames (ORFs) upstream of wzm, enco...
  15. Three genes encoding for putative methyl- and acetyltransferases map adjacent to the wzm and wzt genes and are essential for O-antigen biosynthesis in Rhizobium etli CE3.

    Molecular Plant-Microbe Interactions 16(12):1085 (2003) PMID 14651342

    The elucidation of the structure of the O-antigen of Rhizobium etli CE3 predicts that the R. etli CE3 genome must contain genes encoding acetyl- and methyltransferases to confer the corresponding modifications to the O-antigen. We identified three open reading frames (ORFs) upstream of wzm, enco...
  16. Archaean ultra-depleted komatiites formed by hydrous melting of cratonic mantle.

    Nature 423(6942):858 (2003) PMID 12815428

    Komatiites are ultramafic volcanic rocks containing more than 18 per cent MgO (ref. 1) that erupted mainly in the Archaean era (more than 2.5 gigayears ago). Although such compositions occur in later periods of Earth history (for example, the Cretaceous komatiites of Gorgona Island), the more re...
  17. Archaean ultra-depleted komatiites formed by hydrous melting of cratonic mantle.

    Nature 423(6942):858 (2003) PMID 12815428

    Komatiites are ultramafic volcanic rocks containing more than 18 per cent MgO (ref. 1) that erupted mainly in the Archaean era (more than 2.5 gigayears ago). Although such compositions occur in later periods of Earth history (for example, the Cretaceous komatiites of Gorgona Island), the more re...
  18. Isolation and characterization of the major nod factor of Bradyrhizobium japonicum strain 532C.

    Microbiological Research 157(1):25 (2002) PMID 11911611

    Bradyrhizobium japonicum 532C nodulates soybean effectively under cool Canadian spring conditions and is used in Canadian commercial inoculants. The major lipo-chitooligosaccharide (LCO), bacteria-to-plant signal was characterized by HPLC, FAB-mass spectroscopy MALDI-TOF mass spectroscopy and re...
  19. Isolation and characterization of the major nod factor of Bradyrhizobium japonicum strain 532C.

    Microbiological Research 157(1):25 (2002) PMID 11911611

    Bradyrhizobium japonicum 532C nodulates soybean effectively under cool Canadian spring conditions and is used in Canadian commercial inoculants. The major lipo-chitooligosaccharide (LCO), bacteria-to-plant signal was characterized by HPLC, FAB-mass spectroscopy MALDI-TOF mass spectroscopy and re...
  20. Is the placebo powerless?

    New England Journal of Medicine 345(17):1276; author reply 1278 (2001) PMID 11680452