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 Saint-Antoine (the latter itself being the successor to Saint-Antoine-des-Champs Abbey). In 2010, the Sorbonne University group was created, including the Pantheon-Assas University, the Paris-Sorbonne University, the Muséum National d'Histoire Naturelle, the INSEAD, and the University of Technology of Compiègne; for this occasion the UPMC logo were changed again. UPMC merged with Paris-Sorbonne University into a combined Sorbonne University on 1 January 2018. Pierre and Marie Curie University Pierre and Marie Curie University (), titled as UPMC from 2007–2017 and also known as Paris 6, was a public research university in Paris, France from 1971 to 2017. The university is located