In this situation, translation begins at the 5' end of the mRNA while the 3' end is still attached to DNA. In all types of cells, the ribosome is composed of two subunits: the large (50S) subunit and the small (30S) subunit (S, for svedberg unit, is a measure of sedimentation velocity and, therefore, mass).
The most common types of nuclear power plants use water for cooling in two ways: 1  To convey heat from the reactor core to the steam turbines. 2  To remove and dump surplus heat from this steam circuit.
A chiller is a heat-transfer device that uses mechanical. refrigeration to remove heat from a process load and. transfers the heat to the environment. Chillers are used by. plastics processors when they need a lower process fluid. temperature than a simpler system, such as an evaporative. cooling tower, can provide.