In May, 15th has been presented the Ph. D. Thesis of Mr. Moritz Volland, entitled «Factor and Mechanisms of Metal Nanoparticle Toxicity» which has been carried out in the research group EEBAS and in the frame of the Excellence Project of Junta Andalucía P11-RNM-7812. This thesis has been supervised by Dr. Miriam Hampel and Dr. Julián Blasco.