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Left to right: MR16 with GU10 base, MR16 with GU5.3 base, MR11 with GU4 or GZ4 base Line drawing of an LED MR16 lamp, with a heatsink rather than a reflector. A multifaceted reflector (often abbreviated MR) light bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps.
The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...
G5.3 – 5.3 mm (0.20866 in) pin spacing GU5.3, GX5.3, GY5.3, GZ5.3 – same as G5.3 and only denote what lamp mount clip is needed to hold the actual light bulb in place; G6.35 – 6.35 mm (0.25 in)spacing GY6.35 & GZ6.35 – same as G6.35 and only denote what lamp mount clip is needed to hold the actual light bulb in place
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A group may have a small base compared to the set it acts on. In the "best case", a base can have size 1, as in the case of the additive group of the integers . On the other hand, the symmetric groups and alternating groups have large bases (the symmetric group S n has base size n − 1), and there are often specialized algorithms that deal ...
2-tert-Butyl-1,1,3,3-tetramethylguanidine is an organic base, also known as Barton's base.It is named after Nobel Prize-winning British chemist Derek Barton.Barton and his assistants prepared a series of guanidines with steric hindrance in 1982; in this case five alkyl groups: four methyl groups and one tert-butyl group.
In IUPAC nomenclature of chemistry, a pendant group (sometimes spelled pendent) or side group is a group of atoms attached to a backbone chain of a long molecule, usually a polymer. Pendant groups are different from pendant chains, as they are neither oligomeric nor polymeric. [2] For example, the phenyl groups are the pendant groups on a ...
The 1st, 2nd, and 9th Aeromedical Evacuation Groups all previously existed.. The 427th Special Operations Training Squadron (tail code IJ) at England Air Force Base, Louisiana, flew the Cessna A-37 Dragonfly (OA-37B FAC variant) from 1970–1972, assigned to the provisional 4410th Special Operations Training Group, Tactical Air Command.