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31 results on '"Mostefaoui S"'

1. HRTEM characterization of Ca-Carbonate nanophases in a 3.334 Ga-old microbial mat from the Barberton greenstone belt, South Africa: implication for evolution of photosynthesis

Author

BARBARA CAVALAZZI, Westall, F., Andreazza, C., Rouzaud, J. N., Parisini, A., Lemelle, L., Simionovici, A., Foucher, F., Salomé, M., Marocchi, Y., Hofmann, A., Thiel, V., Mostefaoui, S., Meibom, A., Robert, F., Cavalazzi B., Westall F., Andreazza C., Rouzaud J.-N., Parisini A., Lemelle L., Simionovici A., Foucher F., Salomé M., Marocchi Y., Hofmann A., Thiel V., Mostefaoui S., Meibom A., and Robert F.

Subjects
HRTEM, Ca-Carbonate nanophase, Barberton

18. Interstellar and interplanetary solids in the laboratory

Author

Dartois, E., Alata, I., Engrand, C., Brunetto, R., Duprat, J., Pinot, T., Quirico, E., Laurent Remusat, Bardin, N., Briani, G., Mostefaoui, S., Morinaud, G., Crane, B., Szwec, N., Delauche, L., Jamme, F., Sandt, C., Dumas, P., POTHIER, Nathalie, Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), and Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de recherche pour le développement [IRD] : UR206-Centre National de la Recherche Scientifique (CNRS)

Subjects
Inerstellar medium, [SDU] Sciences of the Universe [physics], Interstellar solids, [SDU]Sciences of the Universe [physics], Interplanetary solids, DISM, Molecular cloud, Astrophysics::Galaxy Astrophysics, Laboratory
Abstract

International audience; The composition of the interstellar matter is driven by environmental parameters (e.g. elemental abundance, density, reactant nature, radiations, temperature, time scales) and results also from external interstellar medium physico-chemical conditions. Astrochemists must rely on remote observations to monitor and analyze the com­position of interstellar solids. These observations give essentially access to the molecular functionality of the solids, rarely elemental composition constraints and isotopic fractionation only in the gas phase. Astrochemists bring additional information from the study of analogues produced in the laboratory, placed in simulated space environments. Planetologists and cosmochemists can have access and spectroscopically examine collected extra-terrestrial material directly in the laboratory. Observations of the diffuse interstellar medium (DISM) and molecular clouds (MC) set constraints on the composition of organic solids and large molecules, that! can then be compared with collected extraterrestrial materials analyses, to shed light on their possible links.

25. Overview of the Results of the Organics PET Study of the Cometary Samples Returned from Comet Wild 2 by the Stardust Mission

Author

Sandford, S. A., Aléon, J., Alexander, C. M. O'D., Araki, T., Bajt, S., Baratta, G. A., Borg, J., Bradley, J. P., Brownlee, D. E., Brucato, J. R., Burchell, M. J., Busemann, H., Butterworth, A., Clemett, S. J., Cody, G., Colangeli, L., Cooper, G., dï’Hendecourt, L., Djouadi, Z., Dworkin, J. P., Ferrini, G., Fleckenstein, H., Flynn, G. J., Franchi, I. A., Fries, M., Gilles, M. K., Glavin, D. P., Gounelle, M., Grossemy, F., Jacobsen, C., Keller, L. P., Kilcoyne, A. L. D., Leitner, J., Matrajt, G., Meibom, A., Mennella, V., Mostefaoui, S., Nittler, L. R., Palumbo, M. E., Papanastassiou, D. A., Robert, F., Rotundi, A., Snead, C. J., Spencer, M. K., Steele, A., Stephan, T., Tsou, P., Tyliszczak, T., Westphal, A. J., Wirick, S., Wopenka, B., Yabuta, H., Zare, R. N., and Zolensky, M. E.

Abstract

This presenation will provide an overview of the efforts and results produced by the Organics Preliminary Examination Team during their studies of the samples returned from comet Wild 2 by the Stardust spacecraft.

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