Svedberg unit


Svedberg unit
The unit applied to the sedimentation coefficient of a particle in a high-speed or ultracentrifuge. The unit S is calculated as follows, S= rate of sedimentation x 1/ r2 r,where r is the speed of rotation in radians per second and r is the radius to a chosen point in the centrifuge tube. 1 Svedberg unit is defined as a velocity gradient of 10-13 seconds. Named after a pioneer of the ultracentrifuge. The units are non-additive: a particle formed from two 5S particles will not have a sedimentation coefficient of 10S.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Svedberg (unit) — or Svedberg [sfed′bərg] n. 〚after The(odor) Svedberg (1884 1971), Swed chemist〛 a unit of time, equal to 10 13 second, used in determining the rate of sedimentation of a macromolecule in an ultracentrifuge * * * …   Universalium

  • Svedberg (unit) — or Svedberg [sfed′bərg] n. [after The(odor) Svedberg (1884 1971), Swed chemist] a unit of time, equal to 10 13 second, used in determining the rate of sedimentation of a macromolecule in an ultracentrifuge …   English World dictionary

  • Svedberg (unit) — or Svedberg [sfed′bərg] n. [after The(odor) Svedberg (1884 1971), Swed chemist] a unit of time, equal to 10 13 second, used in determining the rate of sedimentation of a macromolecule in an ultracentrifuge …   English World dictionary

  • Svedberg unit — (sfed berg) The unit used in expressing the sedimentation coefficient; the greater a particle s Svedberg value, the faster it travels in a centrifuge …   Dictionary of microbiology

  • svedberg unit — noun see svedberg …   New Collegiate Dictionary

  • svedberg unit — noun see svedberg …   Useful english dictionary

  • Svedberg unit — (S) a unit equal to 10−13 second used for expressing sedimentation coefficients (q.v.) of macromolecules …   Medical dictionary

  • Svedberg unit flotation unit — Sved·berg unit, flotation unit (sfedґbərg) [Theodor Svedberg, Swedish chemist, 1884–1971, inventor of the ultracentrifuge and winner of the Nobel prize for chemistry in 1926 for his work on disperse systems] see under unit …   Medical dictionary

  • Svedberg — A svedberg (symbol S, sometimes Sv, not to be confused with Sv for the SI unit sievert as well as the non SI sverdrup) is a non SI physical unit used for sedimentation coefficients. It characterizes the behaviour of a particle type in… …   Wikipedia

  • Svedberg — Theodor, Swedish chemist and Nobel laureate, 1884–1971. See S. equation, S. of flotation, S. unit. * * * sved·berg sfed .bərg, .ber ē n a unit of time amounting to 10 13 second that is used to measure the sedimentation velocity of a colloidal… …   Medical dictionary


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