A Svedberg (symbol S, sometimes Sv) is a non-SI physical unit used in ultracentrifugation. It is named after the Swedish physicist and 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. Jump to: navigation, search The International System of Units (abbreviated SI from the French language name Système International dUnités) is the most widely used system of units. ... Since antiquity, people have tried to understand the behavior of matter: why unsupported objects drop to the ground, why different materials have different properties, and so forth. ... The ultracentrifuge is a centrifuge optimized for spinning a rotor at very high speeds, capable of generating acceleration as high as 1,000,000 G (9,800 km/s²) There are two kinds of ultracentrifuges, the preparative and the analytical ultracentrifuge. ... A physicist is a scientist trained in physics. ... Look up chemist on Wiktionary, the free dictionary. ... Theodor (The) Svedberg (August 30, 1884 – February 25, 1971) was a Swedish chemist and Nobel laureate. ... 1884 is a leap year starting on Tuesday (click on link to calendar). ... Jump to: navigation, search 1971 is a common year starting on Friday (click for link to calendar). ... Sir Edward Appletons medal Photographs of Nobel Prize Medals. ... Chemistry (in Greek: χημεία) is the science of matter that deals with the composition, structure, and properties of substances and with the transformations that they undergo. ... Jump to: navigation, search 1926 was a common year starting on Friday (link will take you to calendar). ... In general, a colloid or colloidal dispersion is a two-phase system of matter; a type of mixture intermediate between homogeneous mixtures and heterogeneous mixtures. ... The ultracentrifuge is a centrifuge optimized for spinning a rotor at very high speeds, capable of generating acceleration as high as 1,000,000 G (9,800 km/s²) There are two kinds of ultracentrifuges, the preparative and the analytical ultracentrifuge. ...

The sedimentation rate or coefficient of a particle or macromolecule is computed by dividing the constant speed of sedimentation (in m/s) into the acceleration applied (in m/s²). The speed is constant because the acceleration applied by the ultracentrifuge (measuring typically in the millions of gravities) is cancelled by the viscous resistance of the medium (normally water) through which the particle is moving. The result has the dimensions of a unit of time and is expressed in svedbergs. One svedberg is defined as exactly 10^-13s. A macromolecule is a molecule of high relative molecular mass, the structure of which essentially comprises the multiple repetition of units derived, actually or conceptually, from molecules of low relative molecular mass. ... Speed (symbol: v) is the rate of motion, or equivalently the rate of change of position, expressed as distance d moved per unit of time t. ... Jump to: navigation, search Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector), defined by distance in metres divided by time in seconds. ... Jump to: navigation, search Acceleration is the time rate of change of velocity, and at any point on a v-t graph, it is given by the gradient of the tangent to that point In physics, acceleration (symbol: a) is defined as the rate of change (or time derivative) of... Metres per second squared is the SI derived unit of acceleration (scalar) and (vector), defined by distance in metres divided by time in seconds and again divided by time in seconds. ... g (also gee, g-force or g-load) is a non-SI unit of acceleration defined as exactly 9. ... Jump to: navigation, search Water (from the Old English word wæter; c. ... Jump to: navigation, search Dimension (from Latin measured out) is, in essence, the number of degrees of freedom available for movement in a space. ... Jump to: navigation, search 8:17 am, August 6, 1945, Japanese time. ... Jump to: navigation, search The second (symbol: s) is the SI base unit of time. ...

The svedberg is not additive: a particle formed of two 5 S particles will not have a sedimentation coefficient of 10 S.