Liquefaction of gases low temperatures, using, for example, turboexpanders. The liquefaction of air is used to obtain nitrogen, oxygen, and argon and other atmospheric noble gases by separating the air components by fractional distillation in a cryogenic air separation unit. Air is liquefied by the Linde process, in which air is alternately compressed, cooled, and expanded, each expansion results in a considerable reduction in temperature. With the lower temperature the molecules move more slowly and occupy less space, so the air changes phase to become liquid. Air can also be liquefied by Claude's process in which the gas is allowed to expand isentropically
The Noble Sage Art Gallery writers and poets. They include: The Noble Sage Art Gallery The Noble Sage Art Collection is a contemporary art gallery in Belsize Park, North London. It was opened by Jana Manuelpillai in 2006. The gallery specialises exclusively in Indian, Sri Lankan and Pakistani contemporary art and represents over forty artists. The collection includes over 500 artworks, most of which are paintings, sculpture and works on paper from south Indian states of Tamil Nadu, Kerala and Karnataka. Artists shown at the gallery include: The Noble Sage holds regular screenings of art house films from the Indian Subcontinent. The Noble Sage has