Complex sentence: In 1957, he took two years leave of absence from his lecturer post to work under Professor M.O.P.Iyengar for his Ph.D., which he obtained in 1959, and toworked on a scheme to control algae in the Mithalpur Salt Works, sponsored by the Tata Industries.
Split into simpler sentences: In 1957, he took two years leave of absence from his lecturer post to work under Professor M.O.P.Iyengar for his Ph.D., which he obtained in 1959. This occurred while he worked on a scheme to control algae in the Mithalpur Salt Works, sponsored by the Tata Industries.