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The scanning electron microscopy (SEM) images of microparticles resulting from spray drying process: whole milk (A,D,G) skim Milk; (B,E,H) and talc powder (C,F,I) talc powder. These images illustrate the differences among whole milk, skim milk and talc powder. Talc powder microparticles showed irregular layers with fractures and few agglomerates, while (whole and skim) milk showed an agglomerate structure composed of heterogeneous spheres or polyhedron.
