"Pioneers" of Soviet physical chemistry (materials for the biographies of Ya.M. Kolotyrkin and N.A. Fucks)

The article is devoted to the participation of two outstanding Soviet physicochemists, Ya.M. Kolotyrkin and N.A. Fuchs, in the international scientific transfer in the 1950s and 1960s. The author uses biographical materials, memories of the relatives and students of the scientists, and introduces previously unstudied letters from the archive fund of the Physicochemical Research Institute named after L.Ya. Karpov to the scientific world. The author underlines contribution of scientists to the study of physicochemical problems: the contribution of Ya.M. Kolotyrkin in the field of study of corrosion and protection of metals, and the role of N.A. Fuchs in the elaboration of the theory of aerosols; she emphasizes that the scientific activity of Soviet scientists was highly appreciated by both Soviet colleagues and foreign experts.