The effect of MgCl₂ on the kinetics of the Maillard reaction in both aqueous and dehydrated systems
2010
Matiacevich, Silvia B. | Santagapita, Patricio R. | Buera, María del Pilar
The modification of Maillard reaction kinetics induced by MgCl₂ was evaluated in both liquid and dehydrated model systems with special emphasis on the interactions of the salt with water and/or the sugars. In liquid trehalose systems, browning is accelerated by the presence of MgCl₂ due to the increased sugar hydrolysis and to the reduction of water mobility caused by the salt (shown by the decrease in ¹H NMR relaxation times T ₂), counteracting the inhibitory effect of water on the reaction. In water restricted trehalose systems, MgCl₂ inhibited the Maillard reaction. The salt-sugar interactions, manifested by the delayed sugar crystallization, decreased the reaction rate by affecting the reactivity of reducing sugars. Molecular and supramolecular effects in the presence of MgCl₂ have been observed in the present work, and must be taken into account considering high technological interest in finding strategies to either inhibit or enhance the Maillard reaction depending on the application.
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