Mikhail Amelkin, chief technology officer of Tion, a start-up that manufactures air-purification systems in Akademgorodok, in Siberia, a town specially designed for scientists in the Soviet period. Photograph: James Hill/New York Times

Dmitri Trubitsyn is a young physicist-entrepreneur with a patriotic reputation, seen in this part of Siberia as an exemplar of the talents, dedication(...)