Nobel Prize Recipient. Paul Karrer received recognition after being awarded the 1937 Nobel Prize for Chemistry with British chemist, Walter Haworth. According to the Nobel Prize committee, he received the award "for his investigations on carotenoids, flavins and vitamins A and B2." He received 28 nominations for the Nobel candidacy. In addition to these two men, Albert Szent-Györgyi received the 1937 Nobel Prize for Physiology or Medicine for discovering Vitamin C. There were long and acrimonious deliberations on which worthy candidate would receive which category of the Nobel Prize. Born the son of Swiss nationals in Russia, in 1892 his family returned to Switzerland. He received his education at Wildegg and at the grammar school in Lenzburg, Aargau, graduating in 1908. In 1911 he received his Doctor of Philosophy Degree in chemistry at the University of Zurich and spent an additional year as assistant in the Chemical Institute. He then became a chemist with 1908 Nobel Prize in Physiology or Medicine, Paul Ehrlich, at the Georg Speyer Haus in Frankfurt, Germany. In 1919 he became Professor of Chemistry and Director of the Chemical Institute. His work led to the establishment of the correct constitutional formula for beta-carotene, the chief precursor of vitamin A, the first time that the structure of a vitamin or provitamin had been established. He later confirmed the structure of ascorbic acid or vitamin C and extended his researches into the vitamin B2 and E. In 1955 he became President of the 14th International Congress on Pure and Applied Chemistry. He received numerous honorary doctorate degrees for his work throughout Europe and the United States as well as a full of honorary member of numerous chemical and biochemical societies throughout the world. Besides the Nobel Prize, in 1922 he was awarded the Marcel Benoist Prize by the Marcel Benoist Foundation and the Cannizzaro Prize by the Italian Society of Chemistry. He died at the age of 82. His book "Textbook of Organic Chemistry" was published in 1927, went through 13 editions, and although was published originally in German, it was later published in six other languages.