Edema has many possible causes: 1  Prolonged standing or sitting, especially in hot weather, can cause excess fluid to accumulate in the feet, ankles and lower legs. 2  Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency.
Cars with nitrous-equipped engines can be identified by the purge of the delivery system that most drivers perform prior to reaching the starting line. A separate electrically operated valve is used to release air and gaseous nitrous oxide trapped in the delivery system.
Nitrous Oxide is a chemical compound of Nitrogen and Oxygen. Its chemical name is N2O. It is a colourless, non flammable, nontoxic gas with slightly sweetish taste and odour. Well-known method of distributing Nitrous Oxide is as compressed liquid in cylinders of approved design. It keeps combustion, therefore organic oils and greases of petrochemical nature be kept away from Nitrous Oxide gas.