Wallach, Otto, 1847–1931, German chemist, Ph.D. Univ. of Göttingen, 1869. Wallach was a professor at the Univ. of Bonn from 1870 to 1889 and at the Univ. of Göttingen from 1889 to 1915. In 1910 he received the Nobel Prize in Chemistry for his work in the field of alicyclic compounds. Wallach investigated and characterized a large number of essential oils called terpenes, successfully distinguishing among very similar compounds from a variety of plants. His work made a significant contribution to the chemical industry, providing the foundation for new methods of analysis and manufacturing.
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