Your browser doesn't support javascript.
loading
Rheological Properties of DNA Molecules in Solution: Molecular Weight and Entanglement Influences.
Bravo-Anaya, Lourdes Mónica; Pignon, Frédéric; Martínez, Félix Armando Soltero; Rinaudo, Marguerite.
Afiliação
  • Bravo-Anaya LM; Laboratoire Rhéologie et Procédés (LRP), University Grenoble Alpes, Grenoble F-38000, France. monik_ayanami@hotmail.com.
  • Pignon F; Centre National de la Recherche Scientifique (CNRS), Laboratoire Rhéologie et Procédés (LRP), Grenoble F-38000, France. monik_ayanami@hotmail.com.
  • Martínez FAS; Departamento de Ingeniería Química, Universidad de Guadalajara, Blvd. M. García Barragán, Guadalajara C.P. 44430, Mexico. monik_ayanami@hotmail.com.
  • Rinaudo M; Laboratoire Rhéologie et Procédés (LRP), University Grenoble Alpes, Grenoble F-38000, France. frederic.pignon@univ-grenoble-alpes.fr.
Polymers (Basel) ; 8(8)2016 Aug 03.
Article em En | MEDLINE | ID: mdl-30974556
Molecular weight, stiffness, temperature, and polymer and ionic concentrations are known to widely influence the viscosity of polymer solutions. Additionally, polymer molecular weight-which is related to its dimensions in solution-is one of its most important characteristics. In this communication, low molecular weight DNA from salmon sperm was purified and then studied in solutions in a wide concentration range (between 0.5 and 1600 mg/mL). The intrinsic viscosity of this low molecular weight DNA sample was firstly determined and the evidence of the overlap concentration was detected around the concentration of 125 mg/mL. The chain characteristics of these short molecules were studied in terms of the influence of their molecular weight on the solution viscosities and on the overlap parameter CDNA[η]. Furthermore, to complete previously reported experimental data, solutions of a large molecular weight DNA from calf-thymus were studied in a high concentration range (up to 40 mg/mL). The rheological behavior is discussed in terms of the generalized master curve obtained from the variation of the specific viscosity at zero shear rate (ηsp,0) as a function of CDNA[η].
Palavras-chave

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2016 Tipo de documento: Article