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Leningrad University was the institution where Nikolai Semyonov, a renowned Soviet physicist and Nobel laureate, conducted his groundbreaking research. Semyonov's work focused on chemical kinetics and chain reactions, earning him the Nobel Prize in Chemistry in 1956. His association with Leningrad University, now known as Saint Petersburg State University, played a pivotal role in his scientific achievements and solidified the institution's reputation as a leading center for scientific research.