Simulation des Umwandlungsverhaltens von Staehlen unter besonderer Beruecksichtigung der Austenitverformung Schlussberic...
Germany
The solubility of rhodochrosite (MnCO3) and siderite (FeCO3) in anaerobic aquatic environments
Natural groundwaters are often reported to be highly supersaturated with the carbonate minerals siderite (FeCO3) and rhodochrosite (MnCO3). The kinetics of precipitation and dissolution were determined in the light of new determinations of the solubility products of siderite and rhodochrosite. Laboratory experiments showed that the precipitation ki...
The Patagonian icefields : a unique natural laboratory for environmental and climate change studies
Evidence of polymorphous amorphous-to-quasicrystalline phase transformation in Zr66.7Pd33.3 metallic glass
The amorphous-to-quasicrystalline phase transformation and the pressure effect on the transformation in a Zr66.7Pd33.3 metallic glass have been investigated by in situ x-ray diffraction measurements using synchrotron radiation. It is found that the transformation is a polymorphous reaction and external pressure enhances the onset temperature for th...
Das Augusthochwasser 2002 im Elbegebiet
Germany
Chemical reactions and porosity changes during sedimentary diagenesis
Spécial Amérique latine
Variations in phenology of a residual invasive shrub species in Sahelian fallow savannas South-West Niger
The aim of this work was to analyse the phenological variation of a residual invasive semi-evergreen shrub in Sahelian fallows in Niger. This species, Guiera senegalensis (Combretaccae), has benefited from the elimination of other species thanks to its high resistance to the increasing cutting pressure for cultivation. We sought to identify traits ...
Données isotopiques (87Sr/86Sr) et changements hydrologiques depuis 15 000 ans sur l'Altiplano andin
Change of quasilattice constant during amorphous-to-quasicrystalline phase transformation in Zr65Al7.5Ni10Cu7.5Ag10 meta...
The amorphous-to-quasicrystalline phase transformation in a Zr65Al7.5Ni10Cu7.5Ag10 metallic glass has been investigated by monitoring the quasilattice constant and the composition of quasicrystalline particles in the samples annealed in vacuum at 663 K for various times. It is found that the quasilattice constant decreases with annealing time and s...
