siemens

English - Turkish

Definition of siemens in English Turkish dictionary: (isim) iletkenlik birimi; {i} iletkenlik birimi

English - English

Definition of siemens in English English dictionary: In the International System of Units, the derived unit of electrical conductance; the electric conductance in a body that has a resistance of one ohm. Symbol: S; Siemens Martin process Siemens AG Siemens Sir Charles William Karl Wilhelm Siemens; a unit of conductance equal to the reciprocal of an ohm; In the International System of Units, the derived unit of electrical conductance; the electric conductance in a body that has a resistance of one ohm. Symbol; Unit of conductance of a solution This value is the product of solution conductivity (L) in siemens/cm and the cell constant Kc/cm The conductance of a solution in siemens (S) is the reciprocal of its resistance in ohms Formerly known as the Mho ( ); reciprocal of (ohm); German electrical engineer (1816-1892); German electrical engineer (1816-1892) engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883); the SI unit of conductance, symbol S, equivalent to the reciprocal ohm (Ω-1); named after William (Wilhelm) Siemens (1823 - 1883), engineer; engineer who was a brother of Ernst Werner von Siemens and who moved to England (1823-1883); a measurement of current conductance (often abbreviated "G") thru ion channels and is abbreviated "S" Is equal to the ratio of current (measured in amps) divided by voltage (measured in volts) (note: this comes from ohm's law) It also equals 1/R 1 picosiemen equals 10^-12 siemens and is convenient to use for ion channels For example, the ion channel gramicidin has a conductance of 30 pS for cations This is equalivant to 6 28 X 10^6 ions per second per applied volt of conductance of cations thru the pore when the concentration of cations is equal on both sides of the membrane
Siemens AG: German electrical-equipment manufacturer. The first Siemens company, Siemens & Halske, was founded in Berlin in 1847 to build telegraph installations. Under Werner Siemens (1816-92) and his three brothers (including William Siemens), it expanded to produce dynamos, cables, telephones, electric power, and electric lighting. In 1903 Siemens & Halske transferred its power-engineering activities to the new Siemens-Schuckertwerke GmbH, and in 1932 Siemens-Reiniger-Werke AG was established to produce medical equipment. The companies expanded greatly during the Third Reich; after World War II, Siemens officials were charged with using slave labour and participating in the construction and operation of the Auschwitz and Buchenwald camps. The Siemens companies flourished again in the 1950s, and by 1966, when the three separate companies merged to form Siemens AG, were among the world's largest electrical suppliers. Siemens products include electrical components, computer systems, microwave devices, and medical equipment
Sir Charles William Siemens: orig. Karl Wilhelm Siemens born April 4, 1823, Lenthe, Prussia died Nov. 19, 1883, London, Eng. German-born British engineer and inventor. He immigrated to Britain in 1844. In 1861 he patented the open-hearth furnace (see open-hearth process), which was soon being widely used in steelmaking and eventually replaced the earlier Bessemer process. He also made a reputation and a fortune in the steel cable and telegraph industries and was a principal in the company that laid the first successful transatlantic telegraph cable (1866). His three brothers were also eminent engineers and industrialists (see Siemens AG)
Sir William Siemens: orig. Karl Wilhelm Siemens born April 4, 1823, Lenthe, Prussia died Nov. 19, 1883, London, Eng. German-born British engineer and inventor. He immigrated to Britain in 1844. In 1861 he patented the open-hearth furnace (see open-hearth process), which was soon being widely used in steelmaking and eventually replaced the earlier Bessemer process. He also made a reputation and a fortune in the steel cable and telegraph industries and was a principal in the company that laid the first successful transatlantic telegraph cable (1866). His three brothers were also eminent engineers and industrialists (see Siemens AG)
A siemens: mho