Proline

One of the 20 amino acids that make up proteins. Its amino group and the 3rd carbon atom of the side chain form a ring.

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Catalytic cracking

The oil industry is able to meet the world’s growing need for fuel by a process called cracking.

Arginine

One of the twenty protein-building amino acids.

Alcohol oxidation (observation)

Examining the colour of a piece of copper when exposed to heat and then ethanol vapour.

Aniline (C₆H₅NH₂)

The simplest aromatic amine. Its scientific name is phenylamine.

Pyrimidine (C₄H₄N₂)

A heterocyclic organic compound, its derivatives are thymine, cytosine and uracil.

Leucine

One of the 20 amino acids that make up proteins.

Diamond

Crystalline allotrope of elemental carbon, the hardest known natural substance.

Prop-1-ene (C₃H₆)

The monomer of polypropylene.

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