viscoelastic retardation

vis·co·e·las·tic re·tar·da·tion

a technique for the measurement of the molecular weight of large DNA molecules; the DNA is stretched by hydrodynamic shear forces and, when the molecules relax, the relaxation time is measured.

viscoelastic retardation

a low shear viscometric method for the determination of the molecular weight of large (>1010) DNA molecules based on mildly stretching long DNA molecules by hydrodynamic shear forces and then removing the force so that the molecule relaxes back to its normal conformation; the relaxation time is related to, and can be used to determine with accuracy, the molecular weight of DNA molecules of the size found in eukaryotic chromosomes.
References in periodicals archive ?
g]: For creep compliance response changes upon aging, however, there is no apparent change in the characteristic viscoelastic retardation time.
Moreover, it suggests a new fact about molecular orientation: circulating flow in the melt front region and viscoelastic retardation give a V-shaped distribution of principal stress difference even in isothermal simulations, which may explain the second "V" in experimentally observed double V-shaped birefringence patterns near the melt front.