Liquid nitrogen	Nitrogen inert substance Memory for coldness	A natural product Nitrogen displaces oxygen Nitrogen is cold

Cryopreservation	Freezing Storage	Keeping the viability Suitable nitrogen freezing containers

Supply	Types of supply Economy	Nitrogen delivery service or nitrogen tank Minimizing of losses

Cryobank	Structure Ventilation Safety engineering	Parts of nitrogen stocks Suitable permanent and auxiliary ventilation Room air monitoring and safety status