In chemistry,<unk>  can refer to: *(i) most commonly,<unk>  describes a chemical process that introduces a hydroxyl group (-OH) into an organic compound. *(ii) the degree of<unk>  refers to the number of OH groups in a molecule. The pattern of<unk>  refers to the location of hydroxy groups on a molecule or material.
Hydroxylation
Acetylation
Glucuronidation
Demethylation
Hydrolysis
Phosphorylation
Chelation
Saponification