Institut de minéralogie, de physique des matériaux et de cosmochimie

Supramolecular Janus Nanocylinders: Solvent-Induced Hydrogen-Bond Modulation Yields Structures under Thermodynamic Equilibrium

Abstract Janus nanocylinders (JNCs) are anisotropic, non-centrosymmetric colloids composed of two different faces, making them attractive for advanced functional materials. However, their nanometric dimensions and pronounced anisotropy complexify their preparation. Recently, a ve...

Evolutionary dynamics and functional refinement of IGF bioavailability in the vertebrate phylum : focus on IGFBPs

In eutherians, Insulin-like Growth Factor-I (IGF-I) and IGF-II exert insulin-like activity by interacting with type-I receptor. IGF bioavailability is finely regulated by six IGF-Binding Proteins (IGFBPs), IGFBP-1 to -6, which bind IGF-I and -II with high affinity but not insulin...

Carbon solubility and liquid–liquid immiscibility in Fe–C–S ternary system up to 6 GPa: implications for the core of small planetary bodies

Abstract High-pressure, high-temperature experiments were conducted in a multi-anvil press using seven different starting compositions to investigate the phase relations of Fe–C–S liquids at pressures up to 6 GPa and temperatures up to 2000 K. Quenched samples revealed immiscible...

A memory of Paleozoic to Quaternary Greenhouse climates recorded in Southern African regolith

Abstract In this article, we explore the potential of iron-rich duricrust regoliths from old erosional anorogenic surfaces to record clues of the long-term continental paleoclimatic evolution. We coupled geochemical, mineralogical and geochronological analyses on iron oxides and...

Vulnerable microbial communities in Atacama-Altiplano wetlands: modern analogs of ancient ecosystems with implications for sustainability and conservation

Abstract The Altiplano-Puna plateau lies at ∼4,000 m above sea level in the volcanic Andes cordillera. Together with the adjacent Atacama Desert, it forms one of the most hyperarid regions on the planet. Wetlands are rare, influenced by hydrothermalism and, due to high evaporatio...