Walter Soares Leal (born February 2, 1954) is a Brazilian biochemist and entomologist who is known for identifying pheromones and mosquito attractants, and elucidating a mechanism of action of the insect repellent DEET. Leal was the first non-Japanese to earn tenure at the Ministry of Agriculture, Forestry, and Fisheries of Japan. In 2000, he accepted a position as associate professor at the University of California, Davis. Leal is a Distinguished Professor in the Department of Molecular and Cellular Biology. He served as chair of the entomology department at UC Davis (now Department of Entomology & Nematology).
Source: “Walter Leal”, English Wikipedia (CC BY-SA 4.0), excerpt
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