Chemotransmitters play an important role in the transmission of information between nerve cells.

Stoichiometry is a method for calculating the amount of substances in a chemical reaction.

No chemical flavoring is used in this ramen at all.

In organic chemistry, the concept of cis-trans isomers is important.

In organic chemistry, the concept of conformational isomers is very important.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'