Serology plays a very important role in the diagnosis of infectious diseases.

He is an expert in musicology and has a deep knowledge of classical music.

He has a deep interest in toponymy.

He is an expert in neurology.

He has a deep interest in geomancy.

He is an expert in pharmacognosy, and has a deep knowledge about the medicinal value of plants.

My university has decided to close due to financial reasons.

This university has decided to close due to financial reasons.

The opening day of the new semester is April 1st.

The new university will open next week.