Peroxidation is one of the chemical reactions, especially involved in the oxidation of lipids.

Calcium oxide is one of the main components of cement.

Aluminium oxide is widely used as a refractory and abrasive material.

He suddenly stood up and left the room.

I maintain my health by doing aerobic exercises every day.

Radioactive elements are produced in nature and scientific experiments.

He went to the doctor complaining of objective symptoms.

In the traditional Japanese number system, Nahyuta represents a very large number.

Nitrogen monoxide is a cause of air pollution.

Nitrogen dioxide is a cause of air pollution.