Svedberg


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 sedimentation processes, notably centrifugation. The svedberg is technically a measure of time, and is defined as exactly 10-13 seconds (100 fs).

The unit is named after the Swedish chemist Theodor Svedberg (1884-1971), winner of the Nobel prize in chemistry in 1926 for his work in the chemistry of colloids and his invention of the ultracentrifuge.

Bigger particles generally sediment faster, and therefore have higher svedberg values. The svedberg is however not additive. Since the sedimentation rate is associated with the size of the particle, when two particles bind together there is inevitably a loss of surface area. Thus when measured separately they will have svedberg values that do not add up to that of the particle formed when they bind together.

The svedberg is the most important measure used to distinguish ribosomes.

ee Also

* Sedimentation coefficient

External links

* [http://nobelprize.org/educational_games/medicine/dna/a/translation/svedberg_unit.html Svedberg unit] - Nobelprize.org


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  • Svedberg — ist die Maßeinheit für den Sedimentationskoeffizienten Svedberg ist der Familienname folgender Personen: Hillevi Svedberg (1910–1990), schwedische Architektin Rudolf Svedberg (1910–1992), schwedischer Ringer The Svedberg (1884–1971), schwedischer …   Deutsch Wikipedia

  • Svedberg — Svedberg, Theodor …   Enciclopedia Universal

  • Svedberg — Para otros usos de Sv, véase Sv. Una ultracentrífuga. Un svedberg (símbolo S, a veces Sv) es una unidad no incluida en el SI que se usa en ultracentrifugación. Se nombró en homenaje al físico y químico sueco Theodor Svedberg (1884 1971),… …   Wikipedia Español

  • Svedberg — Le Svedberg, de symbole S, est une unité de mesure du taux de sédimentation. Elle fut nommée ainsi en l honneur du chimiste et physicien suédois Theodor Svedberg (1884 1971), lauréat du prix Nobel de chimie en 1926 pour ses travaux en chimie des… …   Wikipédia en Français

  • 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

  • svedberg — noun Etymology: The Svedberg Date: 1937 a unit of time amounting to 10 13 second that is used to measure the sedimentation velocity of a colloidal solution (as of a protein) in an ultracentrifuge and to determine molecular weight by substitution… …   New Collegiate Dictionary

  • Svedberg — Svẹd|berg [nach dem schwed. Chemiker T. Svedberg (1884–1971)]; Syn.: Svedberg Einheit; Einheitenzeichen: S: zeitbehaftete nichtgesetzliche Einheit für den Sedimentationskoeffizienten (↑ Ultrazentrifuge) 1 S = 10‒13 s. * * * Svẹdberg  … …   Universal-Lexikon

  • Svedberg — n. family name; Theodor Svedberg (1884 1971), Swedish chemist, winner of the 1926 Nobel Prize in Chemistry for his work on colloid chemistry …   English contemporary dictionary

  • svedberg — (S)    a unit equal to 10 13 second (0.1 picosecond), used to measure sedimentation coefficients in ultracentrifuge technology. The sedimentation coefficient of a particle is defined to be s/(w2r), where s is the sedimentation rate, w is the… …   Dictionary of units of measurement

  • Svedberg — noun Swedish theologian (1688 1772) • Syn: ↑Swedenborg, ↑Emanuel Swedenborg, ↑Emanuel Svedberg • Instance Hypernyms: ↑theologian, ↑theologist, ↑theologizer, ↑theologiser …   Useful english dictionary


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