Roentgen (unit) Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air. In 1928 it was the first international measurement quantity for ionising radiation to be defined for radiation protection, and was an easily replicated method of measuring air ionization directly by using an ion chamber. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays. Although relatively easy to measure, it had
The Amazing Catfish The Amazing Catfish The Amazing Catfish () is a Mexican comedy-drama film, written and directed by Claudia Sainte-Luce. The film stars Ximena Ayala as Claudia, a young woman who becomes a caretaker for Martha (Lisa Owen), an older matriarch dying of AIDS. The film premiered on August 10, 2013 at the Locarno International Film Festival, where it won two Junior Jury Awards and was a nominee for the Golden Leopard. It had its North American premiere on September 10, 2013 at the 2013 Toronto International Film Festival, and was named winner of the FIPRESCI Discovery Prize. Rotten Tomatoes gives the