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E12 (protein)
E12 or E-12 may refer to: Science, technology and mathematics * the E12 series of preferred numbers * E12 screw, a type of Edison screw * the code name for Microsoft Exchange Server 2007 * Siding Spring Survey code Transport Roads and trails * European route E12 * E12 European long distance path * Ampang–Kuala Lumpur Elevated Highway (AKLEH), a fully elevated expressway in Kuala Lumpur, Malaysia Vehicles * BMW E12 * HMS E12, a United Kingdom Royal Navy submarine which saw service during World War I * Spyker E12, a Dutch Spyker car Other uses * Queen's Indian Defense, Encyclopaedia of Chess Openings code * E12, a postcode district in the E postcode area * E-12 equal temperament An equal temperament is a musical temperament or Musical tuning#Tuning systems, tuning system that approximates Just intonation, just intervals by dividing an octave (or other interval) into steps such that the ratio of the frequency, frequencie ... consisting of twelve equal semitones per octa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E12 Series
The E series is a system of preferred numbers (also called preferred values) derived for use in electronic components. It consists of the E3, E6, E12, E24, E48, E96 and E192 series, where the number after the 'E' designates the quantity of logarithmic value "steps" per decade. Although it is theoretically possible to produce components of any value, in practice the need for inventory simplification has led the industry to settle on the E series for resistors, capacitors, inductors, and zener diodes. Other types of electrical components are either specified by the Renard series (for example fuses) or are defined in relevant product standards (for example IEC 60228 for wires). History During the Golden Age of Radio (1920s to 1950s), numerous companies manufactured vacuum-tube–based AM radio receivers for consumer use. In the early years, many components were not standardized between AM radio manufacturers. The capacitance values of capacitors (previously called cond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E12 Screw
Edison screw (ES) is a standard lightbulb socket for electric light bulbs. It was developed by Thomas Edison (1847–1931), patented in 1881, and was licensed in 1909 under General Electric's Mazda trademark. The bulbs have right-hand threaded metal bases (caps) which screw into matching threaded sockets (lamp holders). For bulbs powered by AC current, the thread is generally connected to neutral and the contact on the bottom tip of the base is connected to the "live" phase. In North America and continental Europe, Edison screws displaced other socket types for general lighting. In the early days of electrification, Edison screws were the only standard connector, and appliances other than light bulbs were connected to AC power via lamp sockets. Today Edison screw sockets comply with international standards. Their types are designated as "Exx", such as "E26", where "xx" indicates the diameter of the socket in millimeters. History In the United States, early manufacturers of i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
