Nikolay Nikolayevich Semyonov , sometimes Semenov, Semionov or Semenoff was a Soviet physicist and chemist. Semyonov was awarded the 1956 Nobel Prize in Chemistry for his work on the mechanism of chemical transformation.

Saratov is the largest city and administrative center of Saratov Oblast, Russia, and a major port on the Volga River. As of the 2021 Census, Saratov had a population of 901,361, making it the 17th-largest city in Russia by population. Saratov is 389 kilometres (242 mi) north of Volgograd, 442 kilometres (275 mi) south Samara, and 858 kilometres (533 mi) southeast of Moscow.