Myelosuppression - a decrease in the production of blood cells, which may lead to low blood count. Pancytopenia - a lowering of all three types of blood cells; red blood cells, platelets, and white blood cells, which may lead to low red blood cell count, low blood platlet count, and/or low white blood cell count.
Helium is used as a cooling medium for the Large Hadron Collider (LHC), and the superconducting magnets in MRI scanners and NMR spectrometers. It is also used to keep satellite instruments cool and was used to cool the liquid oxygen and hydrogen that powered the Apollo space vehicles.
eries, and other industrial facilities use nitrogen gas to purge equipment, tanks, and pipelines of vapors and gases. Nitrogen gas is also used to maintain an inert and protective atmosphere in tanks storing flammable liquids or air-sensi-tive materials. It may be delivered in cylinders or tanks, or generated onsite (Figure 1). Liquid nitrogen is used in a variety of applications, particularly in the food and pharmaceutical industries, to