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
Curie Curie The curie (symbol Ci) is a non-SI unit of radioactivity originally defined in 1910. According to a notice in "Nature" at the time, it was named in honour of Pierre Curie, but was considered at least by some to be in honour of Marie Curie as well. It was originally defined as "the quantity or mass of radium emanation in equilibrium with one gram of radium (element)" but is currently defined as: 1 Ci = decays per second after more accurate measurements of the activity of Ra (which has a specific activity of .) In 1975 the General Conference