Slide16Among his many accomplishments, Alfred Nobel discovered dynamite.  He was looking for a way to make a stable form of Nitroglycerin, to use as an explosive.  In his factories it was noticed that many of his employees who had chest pain felt better during the week while they were at work.   On the week-end while at home their chest pain returned.  What do the fumes of Nitroglycerin contain??  

Nitric Oxide!!