Oktay Sinanoglu, Turkish physical chemist and molecular biophysicist (died 2015)

Oktay Sinanoğlu was a Turkish physical chemist and molecular biophysicist who made contributions to the theory of electron correlation in molecules, the statistical mechanics of clathrate hydrates, quantum chemistry, and the theory of solvation.

February 25 is the 56th day of the year in the Gregorian calendar; 309 days remain until the end of the year.