Directeur de Recherche at the Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE). I received my PhD in biophysics in 1985 from the Université Pierre et Marie Curie (now Sorbonne Université). I have held positions at INRAE research centres in Guadeloupe (French West Indies), Versailles and currently Montpellier. I have also been visiting scientist at the University of Oxford and associate professor at the University Federico II of Naples. I have coordinated an European contract on the fate of prions in soil (TSE-SOIL-FATE). I combine expertise in biophysics, biochemistry and soil science to study the adsorption and conformation of proteins on soil solid surfaces. My fields of interest are: (i) the role of microbial extracellular enzymes in soil biogeochemical cycles (with a focus on hydrolysis of organic P); (ii) the environmental and health consequences of the dispersion in soils of pathogenic proteins (prions, Bt insecticidal toxins); (iii) the biophysical approaches providing new insight in the former topics.