cryogenic liquid system
121Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …
122Air pollution — from World War II production Smog over …
123Abkürzungen/Luftfahrt/L–R — Dies ist der vierte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E–K …
124Noble gas — Group 18 Period 1 2 He 2 …
125Aerogel — is a low density solid state material derived from gel in which the liquid component of the gel has been replaced with gas. The result is an extremely low density solid with several remarkable properties, most notably its effectiveness as a… …
126Soviet space program — The Soviet space program consisted of initiatives within the Soviet Union by competing design groups. Being primarily a ownage military program, it was classified. Sergey Korolyov (also transliterated as Korolev) was the head of the principal… …
127Coolant — A coolant is a fluid which flows through a device to prevent its overheating, transferring the heat produced by the device to other devices that use or dissipate it. An ideal coolant has high thermal capacity, low viscosity, is low cost, non… …
128Environmental remediation — Generally, remediation means providing a remedy, so environmental remediation deals with the removal of pollution or contaminants from environmental media such as soil, groundwater, sediment, or surface water for the general protection of human… …
