11.   A chemical reaction between water and rotting vegetable matter release carbon dioxide and form carbonic acid.

12.   A reaction between hydrogen peroxide and potassium hydroxide generates the laser.

13.   Fuel cells are battery-like devices for electric motors that recharge through a reaction between hydrogen and oxygen.

14.   Initially, the elements and simple molecular fragments in the gas cloud are so diffuse that reactions between them are practically impossible.

15.   Maderna leaves space for on-the-spot action and reaction between the two elements.

16.   Nitromethane is the result of a chemical reaction between nitric acid and propane.

17.   Ozone is formed by reaction between sunlight and oxygen in the presence of exhaust from engines burning fossil fuels.

18.   The reaction between the two magnetic fields is what propels the cars.

19.   The reaction between G Pro and spray paint breaks down both, so a new protective coat is needed after each washing.

20.   The researchers are now testing the reaction between mouse and hamster prions in the cell-free culture.