Roentgen equivalent man has been defined since 1976 as equal to 0.01 sievert, which is the more commonly used SI unit outside the United States. A number of earlier definitions going back to 1945 were derived from the roentgen unit, which was named after Wilhelm Röntgen, a German scientist who discovered X-rays. The acronym is now a misleading historical artifact, since 1 roentgen actually deposits about 0.96 rem in soft biological tissue, when all weighting factors equal unity. Older units of rem following other definitions are up to 17% smaller than the modern rem. One rem carries with it a 0.05% chance of
Wilhelm Loewenthal Moisés Ville, the first colony of the JCA. It has been proven by banking records that Lowenthal died in Berlin two years later, after leaving Brussels. In the colony, Lowenthal's name graces the principal thoroughfare. Wilhelm Loewenthal Wolff Wilhelm Lowenthal ( – ) was a Polish-born, naturalized French Doctor of Medicine. Born in Rybnik, Poland, after graduating from the University of Berlin, Lowenthal (or Löwenthal, with the umlaut), went to the Caucasus to continue his medical research. At the same time, he was Professor at the University of Geneva, in its branch at the Lausanne, Switzerland. He corresponded regularly with