Ionization of molecules can lead to radiolysis, (breaking chemical bonds,) and formation of highly reactive free radicals.

NO, a highly reactive free radical, diffuses into the smooth muscle cells of the blood vessel and interacts with soluble guanylate cyclase.

The oxygen-oxygen chemical bond of peroxide is unstable and easily split into reactive radicals via homolytic cleavage.

Lactoperoxidase reacts with the phenolic A-ring of estrogens to produce reactive free radicals.

Ionizing radiations may produce highly reactive free radicals that can break the bonds in the DNA.

This action catalyzes reactions that produce reactive radicals and can produce reactive oxygen species.

Ionising radiation kills cells indirectly by creating reactive free radicals.

It is a neutral free molecule with two unsatisfied valence bonds, and is therefore a highly reactive free radical.

Molecules broken by radiation can become highly reactive free radicals that cause further chemical damage.

In addition, hydrogen peroxide reduces to the hydroxyl radical, the most reactive radical and the one with the greatest possibility for damage.