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...classes of membrane receptors: (a) ion-channel receptors; (b) 7-helix transmembrane receptors (7TM receptors); (c) receptors with intrinsic enzymatic activity (RIEA); (d) enzyme-associated receptors (recruiter receptors). Receptors that also serve as the effector For example, one type of acetylcholine receptor is also an ion channel, and belongs to a family of receptors...

...class of reactors: the ‘fast reactors’. A fast reactor has no moderator, merely a coolant with which useful energy can be extracted (e.g. for electricity generation). Typical coolants used in experimental, prototype, and demonstration fast reactors have included liquid sodium, inert gases and lead (or lead alloys). Fast reactors have been investigated throughout the...