sedimentation coefficient

sedimentation coefficient
sedimentation coefficient n a measure of the rate at which a molecule (as a protein) suspended in a colloidal solution sediments in an ultracentrifuge usu. expressed in svedbergs

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the velocity at which a particle sediments in a centrifuge divided by the applied centrifugal field, the result having units of time (velocity divided by acceleration), usually expressed in Svedberg units (S), which equal 10−13 second. Sedimentation coefficients are used to characterize the size of macromolecules, e.g., 5.8S rRNA, 22S rRNA; they increase with increasing mass and density and are higher for globular than for fibrous particles. Called also sedimentation constant.

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  • sedimentation coefficient — sedimentation coefficient. См. коэффициент седиментации. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Sedimentation coefficient — The sedimentation coefficient s of a particle is used to characterize its behaviour in sedimentation processes, notably centrifugation. It is defined as the ratio of a particle s sedimentation velocity to the acceleration that is applied to it… …   Wikipedia

  • sedimentation coefficient — sedimentacijos koeficientas statusas T sritis Standartizacija ir metrologija apibrėžtis Koeficientas, apibūdinantis dalelių nusėdimo spartą centrifuguojant. atitikmenys: angl. sedimentation coefficient vok. Sedimentationskoeffizient, m rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • sedimentation coefficient — sedimentacijos koeficientas statusas T sritis chemija apibrėžtis Koeficientas, apibūdinantis dalelių nusėdimo greitį centrifuguojant. atitikmenys: angl. sedimentation coefficient rus. коэффициент седиментации …   Chemijos terminų aiškinamasis žodynas

  • sedimentation coefficient — sedimentacijos koeficientas statusas T sritis augalininkystė apibrėžtis Rodiklis, rodantis mikrodalelių nusėdimo greitį. atitikmenys: angl. sedimentation coefficient rus. коэффициент седиментации …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • sedimentation coefficient — The ratio of the velocity of sedimentation of a molecule to the centrifugal force required to produce this sedimentation. It is a constant for a particular species of molecule, and the value is given in Svedberg units (S) that, it should be noted …   Dictionary of molecular biology

  • sedimentation coefficient — noun : a measure of the rate at which a molecule (as a protein) suspended in a colloidal solution sediments in an ultracentrifuge usually expressed in svedbergs …   Useful english dictionary

  • Sedimentation — describes the motion of molecules in solutions or particles in suspensions in response to an external force such as gravity, centrifugal force or electric force. Sedimentation may pertain to objects of various sizes, ranging from suspensions of… …   Wikipedia

  • coefficient de sédimentation — sedimentacijos koeficientas statusas T sritis Standartizacija ir metrologija apibrėžtis Koeficientas, apibūdinantis dalelių nusėdimo spartą centrifuguojant. atitikmenys: angl. sedimentation coefficient vok. Sedimentationskoeffizient, m rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • sédimentation — [ sedimɑ̃tasjɔ̃ ] n. f. • 1861; de sédiment 1 ♦ Méd. Formation de sédiment. Sédimentation sanguine : dépôt des globules rouges du sang rendu incoagulable, au fond du tube où il est laissé en repos. Vitesse de sédimentation, dont la détermination… …   Encyclopédie Universelle

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