This chemical reaction is very dangerous.

He is an expert in chemistry.

She decided to undergo facial reconstructive surgery.

He is dedicated to the study of organogenesis.

She overreacted to his words.

Nuclear reactions are used for mass production of energy.

His single word triggered a chain reaction, and everything changed.

I was surprised by his overreaction.

His body showed a rejection reaction to the transplanted organ.

He is dedicated to the study of immunochemistry.