Thermoreversible gelation in aqueous binary solvents of chemically modified agarose.
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.
Dahmani
Mohammed
M
Institut Charles Sadron, CNRS UPR 22, 6 rue Boussingault, F-67083 Strasbourg Cedex, France.
Ramzi
Mohamed
M
Rochas
Cyrille
C
Guenet
Jean-Michel
JM
D002152:Calorimetry, Differential Scanning; D005690:Galactose / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D009502:Neutrons; D012542:Scattering, Radiation; D012685:Sepharose / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry
D014867:Water; D012685:Sepharose; D005690:Galactose