In order to test hypotheses for how DNA replicates, Meselson and Stahl, together with Jerome Vinograd, invented a method that separates macromolecules according to their buoyant density.
2.
Where the viral particles migrate in the tube ( closer to the top, or closer to the bottom ) is an indication of their size, and hence buoyant density.
3.
This is where the equation can become confusing, and the effective stress can be calculated using the buoyant density of the spheres ( soil ), and the height of the soil above.
4.
If samples are centrifuged long enough, the particles in the vessel will reach equilibrium wherein the particles accumulate specifically at a point in the vessel where their buoyant density is balanced with centrifugal force.
5.
Using this technique, investigators can reexamine : i ) the relationship between age and buoyant density of erythrocytes, ii ) erythrocyte destruction through a random removal mechanism, and iii ) the expression of phosphatidylserine on aging erythrocytes.
6.
The term satellite DNA originates from the observation in the 1960s of a fraction of sheared DNA that showed a distinct buoyant density, detectable as a satellite peak in density gradient centrifugation, and that was subsequently identified as large centromeric tandem repeats.
7.
Cupples et al . ( 2007 ) demonstrated a weaker DNA buoyant density shift in when 15 N-versus 13 C-labeled substrates were used in pure culture, conversely a very strong buoyant density shift was observed when both labels were used.
8.
Cupples et al . ( 2007 ) demonstrated a weaker DNA buoyant density shift in when 15 N-versus 13 C-labeled substrates were used in pure culture, conversely a very strong buoyant density shift was observed when both labels were used.
9.
While sharing basic properties with enteroviruses, such as size, shape, nucleic acid composition, and ether-resistance, rhinoviruses are distinguished from enteroviruses by having a greater buoyant density and a susceptibility to inactivation if they are exposed to an acidic environment.
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