was Astrid Cleve, who was the first Swedish woman to obtain a doctoral degree of science. They had five children: Sten (1903–1991), Ulf Svante (1905–1983), Karin Maria (1907–2003), Hans Georg Rigas (1908–2003) and Birgit (1910–2000). In 1913 he married again to his second wife, Elisabeth "Beth" Baroness af Ugglas (1887–1973), whose participated in collaborations with Euler-Chelpin. They had four children: Rolf Sebastian Ugglas (1914–2005), Hans Roland Ugglas (1916–), Curt Leonhard Ugglas (1918–2001) and Johan Erik Ugglas "Jan" (1929–1954). His son, Ulf von Euler, was a well-known physiologist and in 1970 he received a Nobel Prize for his research on the chemical nature of norepinephrine on the synapses. In 1931, his daughter Karin von Euler-Chelpin married the writer Sven Stolpe and had four children with him (one of which was Lisette Schulman). During his life, von Euler-Chelpin created a series of monographs such as Biochemistry of Tumours, written in collaboration with Boleslaw Skarzynski, published in 1942 and the other entitled The Chemotherapy and Prophylaxis of Cancer, published in 1962. von Euler-Chelpin died in Stockholm on 6 November 1964, at the age of 91. Nobel Prize In 1929, Euler-Chelpin and Arthur Harden received the Nobel Prize in chemistry for research on alcoholic fermentation of carbohydrates and the role of enzymes. Arthur Harden dealt only with the chemical effects of bacteria from 1903 with alcoholic fermentation. Harden discovered that the enzyme zymase, discovered by Eduard Buchner, only produces fermentation in interaction with the coenzyme cozymase. Euler-Chelpin, in turn, convincingly described what happens in sugar fermentation and the action of fermentation enzymes using physical chemistry. This explanation led to the understanding of the important processes taking place in the muscles for the supply of energy. References External links 1873 births 1964 deaths Members of the Prussian Academy of Sciences Corresponding Members of the USSR Academy of Sciences Foreign Members of the USSR Academy of Sciences Members of the Lincean Academy Nobel laureates in Chemistry Scientists from Augsburg People from the Kingdom of Bavaria Swedish biochemists Swedish nobility German people of Swiss descent German emigrants to Sweden Humboldt University of Berlin alumni Academic staff of Stockholm University Swedish Nobel laureates Knights Commander of the Order of Merit of the Federal Republic of Germany Members of the German Academy of Sciences at Berlin