1.   Be careful with toxic substances and always follow the directions on the bottles with great care.

2.   Groundand balloon-carried sensors tested the air for toxic substances.

3.   New nosodes have also been added to the armamentarium and special remedies prepared from specific antigens and toxic substances.

4.   Nigel Armstrong, Leeds, Yorkshire I keep reading that plutonium is the most toxic substance in the world.

5.   Occupational health laws regulate toxic substances in the work environment.

6.   The problem was caused by a worker who inadvertently contaminated the coffee machine by cleaning it with a toxic substance.

7.   The toxic substances department must approve it and hammer out a legal agreement with the group before moving forward.

8.   This is the first time that plutonium, the most toxic substance in the world, has been discovered in scrap metal.

9.   This membrane defect makes it much easier for toxic substances made by the immune system to enter red cells and kill parasites.

10.   Toxic substances and nutrients were the prime suspects along with the well-known recidivist, sedimentation.