Whether the ability to chelate free iron and so prevent the formation of the hydroxyl radical is important remains to be seen.

"The hydroxyl radical is a very destructive character," says Packer.

Generally the defining factor is the production and use of the hydroxyl radical.

Ultimately, the hydroxyl radicals are generated in both the reactions.

It can also be produced by the reaction of methane with the hydroxyl radical:

The hydroxyl radicals are thought to purge more than half the sulfur dioxide added to the air.

In the atmosphere it will be lost because of reaction with photochemically produced hydroxyl radicals.

The neutral form of the hydroxyl group is a hydroxyl radical.

As a result of this reaction, the hydroxyl radical is prevented from forming.

This has been traditionally achieved through the treatment of proteins with hydroxyl radicals.