sedimentation coefficient การใช้

• Sedimentation coefficients quoted in literature usually pertain to sedimentation in water at 20癈.
• Ribosomes are most often identified by their sedimentation coefficient.
• Correlation between sedimentation coefficient and molecular weight of denatured DNA
• Sedimentation coefficients are, however, not additive.
• The sedimentation coefficient has the dimensions of a unit of time and is expressed in svedbergs.
• Bigger particles sediment faster and have higher sedimentation coefficients ( svedberg, or S values ).
• Essentially the sedimentation coefficient serves to normalize the sedimentation rate of a particle by the acceleration applied to it.
• The sedimentation coefficient is the ratio of the speed of a substance in a centrifuge to its acceleration in comparable units.
• For instance, the 70 S ribosome that comes from bacteria has actually a sedimentation coefficient of 70 svedberg, although it is composed of a 50 S subunit and a 30 S subunit.
• When the sedimentation coefficient, " "'s " "', of circular DNA is ascertained over a large range of pH, the following curves are seen.
• In vitro, monomeric UMPS, with a sedimentation coefficient S 20, w of 3.6 will become a dimer, S 20, w = 5.1 after addition of anions such as phosphate.
• A substance with a sedimentation coefficient of 26S ( 26?0  " 13 s ) will travel at 26 micrometers per second ( 26?0  " 6 m / s ) under the influence of an acceleration of a million gravities ( 10 7 m / s 2 ).
• He established 4 classes of proteins : water-soluble albumins; salt soluble globulins : vicilin typically having sedimentation coefficients, S values ( a measure of the protein mass determined by sedimentation equilibrium ultracentrifugation ) of about 7 Svedberg units ( hence the common name 7S globulin ) and legumin ( 11S ); alcohol / water-soluble cereal prolamines; and a fourth class, glutelins, of difficultly soluble proteins no longer recognized and now considered low solubility prolamin or globulin storage proteins.