chemical composition

Blue ball pen ink includes dye, fatty acid and alcohol to ensure uniform ink, quick drying and paper sticking.

This taste helps people recognize the taste of carbohydrates and fat.

Odor on each planet is determined by the major chemical components in the atmosphere.

Star explosions known as type 1a supernovae have long been used as a standard candle, their constant brightness is a way for astronomers to measure cosmic distances. and the