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11457 Publications
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  • Dissolved organic matter contribution to rain water, throughfall and soil solution chemistry

    Fillion, Nathalie; Probst, Anne; Probst, Jean-Luc (1999)
    A method is proposed to determine the acid-base properties of natural water samples containing relatively high amounts of dissolved organic matter. The electroneutrality principle as well as titration data are used to estimate the organic anion concentration in open field precipitation, throughfall and soil solutions, and to develop empirical models based on pH and dissolved organic carbon content. The organic acids dissolved in throughfall have a similar acidic site density but are weaker th...

    Hydrodynamique et mécanique des fluides

    Thual, Olivier (2015)
    Qu’il s’agisse du milliard de km3 de l’océan, du million de km3 dans le sous-sol ou des milliers de km3 dans les rivières, canaux ou canalisations, l’eau est en perpétuel mouvement. L’hydrodynamique étudie ces mouvements des échelles les plus grandes jusqu’à celles permet- tant encore de décrire la matière de manière continue (c'est à-dire pour des échelles encore très largement supérieures à la taille des molécules).

    Preliminary Results of the Isothermal Oxidation Study of Pt-Al-NiCoCrAlYTa multi-layered coatings prepared by Sparks Plasma Sintering (SPS)

    Oquab, Djar; Monceau, Daniel; Thébault, Yannick; Estournès, Claude (2008)
    MCrAlY coatings (where M = Co, Ni or Co/Ni) are widely used on turbine blades and vanes as oxidation and corrosion resistant overlays or as a bond-coating in thermal barrier coatings systems. MCrAlY are usually fabricated by Plasma Spraying, Physical Vapour Deposition, High Velocity Oxy-Fuel spraying or electrolytic techniques. The use of emergent Spark Plasma Sintering technique as a preparation method for NiCoCrAlYTa coatings has been presented previously [1]. SPS technique allows fast deve...

    Effect of cytostatic drug presence on extracellular polymeric substances formation in municipal wastewater treated by membrane bioreactor

    Avella, Catalina; Delgado, Luis Fernando; Görner, Tatiana; Albasi, Claire; Galmiche, M.; De Donato, Philippe (2010)
    The effect of the cyclophosphamide and its mean metabolites on extracellular polymeric substances (EPS) formation was investigated. Two lab-scale membrane bioreactors were followed in parallel (one with the cytostatic drugs, the second without). Chromatographic and spectroscopic studies (UV–Vis spectroscopy and IR spectroscopy) showed that the presence of CPs induced an increase in EPS concentration in the biological sludge, especially of soluble substances, mainly polysaccharides and protein...

    Mechanical and tribological properties of Fe/Cr-FeAl2O4-Al2O3 nano/micro hybrid composites prepared by Spark Plasma Sintering

    Gurt Santanach, Julien; Estournès, Claude; Weibel, Alicia; Peigney, Alain; Chevallier, Geoffroy; Laurent, Christophe (2011)
    Fe/Cr–Al2O3 nanocomposite powders are prepared by H2 selective reduction of oxide solid solutions. These powders, an alumina powder and a starting oxide powder, are sintered by spark plasma sintering. The microstructure of the resulting materials is studied. The composites show a lower microhardness and higher fracture strength than unreinforced alumina. The friction coefficient against an alumina ball is lower, revealing the role of the intergranular metal particles, whereas FeAl2O4 grains f...
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