Natalia Fernández Bertolez defended her PhD Thesis “Comparative study of toxicological effect of iron oxide nanoparticles in human nerve cells”. Blanca Laffon Lage and Vanessa Valdiglesias García directed the work. The Thesis has international mention and reached highest record. The committee was composed by Josefina Méndez Felpeto, Joao Paulo Teixeira and Isabel O´Neill de Mascarenhas Gaivao.