Amylose-lipid complex dissociation. A study of the kinetic parameters

The kinetic parameters for the dissociation of the amylose-1-alpha-lysophos phatidilcholine complex were studied by differential scanning calorimetry, using the Borchardt-Daniels and dynamic methods. The reaction order was fou nd to be close to 1 with an activation energy of 419 kJ/mol and the results were verified by an isothermal method; it was found that the activation en ergy increases for increasing water content. Two endotherms were obtained i n the isothermal experiments, suggesting the presence of two forms of the c omplex, one more kinetically stable than the other. (C) 1999 John Wiley & S ons, Inc.