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Thermoreversible gelation in aqueous binary solvents of chemically modified agarose
Mohammed Dahmani1, Mohamed Ramzi, Cyrille Rochas
1Institut Charles Sadron, CNRS UPR 22, 6 rue Boussingault, F-67083 Strasbourg Cedex, France.
International Journal of Biological Macromolecules
|February 6, 2003
Abstract:
The thermoreversible gelation of chemically modified agarose has been studied in aqueous binary solvents (dimethyl sulfoxide and a series of formamide) by differential calorimetry, mechanical testing, and small-angle neutron scattering. The temperature-composition phase diagrams have been established. It is concluded that gelation is promoted by the formation of ternary complexes modified agarose/water/cosolvent, wherein the cosolvent mediates the interaction between chains through the formation of electrostatic interactions.