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Microrheology study of semidiluted deoxyribonucleic acid solutions

  • F. Carvajal (a1), J. G. Alvarez (a1), E.R. Macías (a1), V.V.A. Fernández (a2), E. Robles-Avila (a3), R. Gámez-Corrales (a4) and J.F.A. Soltero (a1)...

Abstract

Linear rheological behavior and Microrheology measurements of sodium salt calf-thymus DNA aqueous solutions as a function of concentration are reported here. The microrheological behavior was obtained by a combination of experimental techniques: mechanical Rheometry and Dynamic light scattering (DLS). The viscoelastic properties of DNA in water as a function of concentration were performed at 20 °C and rheological and microrhelogical curves were performed. The result indicated that for concentrations lower than the entanglement concentration (Ce ) the system exhibits a predominantly viscous behavior, whereas for higher concentrations exhibits a predominantly elastic behavior. The plateau modulus (G0 ) and the zero complex viscosity () follow a power law concentration dependence of the form: and , respectively The microrheology results overlap perfectly in a single line with the mechanical rheology results, extending the time resolution to faster breathing modes

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Corresponding author

*Corresponding author: jfasm@hotmail.com armandosolteros@yahoo.com Telephone and fax number: (52) 33-13-78-59-00 ext 7590

References

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Microrheology study of semidiluted deoxyribonucleic acid solutions

  • F. Carvajal (a1), J. G. Alvarez (a1), E.R. Macías (a1), V.V.A. Fernández (a2), E. Robles-Avila (a3), R. Gámez-Corrales (a4) and J.F.A. Soltero (a1)...

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