ABSTRACT
References .............................................................................................................. 391
Milk is a complex biological secretion that contains various components in different physical states. Whey proteins are present in milk in colloidal solution, while caseins that form a supramolecular structure, the micelles, are in colloidal suspension. Milk fat is present as an emulsion in an aqueous protein phase, wherein the fat structured as globules, in which the lipids are arranged as layers. Fat globules are covered by a membrane that originates from the mammary cell in the secretion process. Therefore, milk components are present in different physical states and also show different particle sizes, as shown in Table 15.1.
