1.   An alternative to using interferon itself as an anti-viral drug is to use chemicals that induce cells to make their own interferon.

2.   Apple growers are under pressure from the public to use fewer chemicals.

3.   Because of using the chemicals in the experiments, I was getting a rash.

4.   Complete removal of green algae from the aquarium is very difficult unless chemicals are used.

5.   Farmers use chemicals to kill insects that would destroy their crops.

6.   Fresh food grown organically - without using chemicals - is better for your health.

7.   Other strategies use natural chemicals called pheromones to disrupt insect reproduction.

8.   The body was thoroughly examined by physicians, who Declared that no chemicals had been used to preserve it.

9.   The chemical was used to kill a mold that grows on peanuts.