Marie Curie theory of "radioactivity" (a term that she coined), techniques for isolating radioactive isotopes, and the discovery of two elements, polonium and radium. Under her direction, the world's first studies into the treatment of neoplasms were conducted using radioactive isotopes. She founded the Curie Institutes in Paris and in Warsaw, which remain major centres of medical research today. During World War I, she developed mobile radiography units to provide X-ray services to field hospitals. While a French citizen, Marie Skłodowska Curie, who used both surnames, never lost her sense of Polish identity. She taught her daughters the Polish language and took
Pierre and Marie Curie University mathematics, 25th in field of physics, 14th in field of natural sciences and 32nd in field of engineering, technology and computer science. UPMC had more than 125 laboratories, most of them in association with the Centre national de la recherche scientifique (CNRS). Some of its most notable institutes and laboratories include the Institut Henri Poincaré, Institut d'astrophysique de Paris, Laboratoire d'informatique de Paris 6 (LIP6), Institut de mathématiques de Jussieu (shared with University Paris-Diderot) and the Laboratoire Kastler-Brossel (shared with École Normale Supérieure). The University's Faculty of Medicine Pierre and Marie Curie is located in the teaching hospitals Pitié-Salpêtrière and