Complex sentence: Bernheim discovered the enzyme system of tyramine oxidase during her doctorate research at the University of Cambridge in 1928, and her research has been referred to as "one of the seminal discoveries in twentieth century neurobiology".
Split into simpler sentences: Bernheim discovered the enzyme system of tyramine oxidase during her doctorate research at the University of Cambridge. Bernheim's discovery of tyramine oxidase has been referred to as "one of the seminal discoveries in twentieth century neurobiology".