Figure 4 : Examples of microscopic images (magnification 160x) of the samples investigated.

Left and middle: samples of group A and B do not contain agglomerates – the very slight agglomeration of the sample of group B is only detectable with a higher magnification (red arrows); right: sample of group C contains some agglomerates.

M Keck et al.Journal of Pharmaceutical Technology and Drug Research  2013 2:17DOI : 10.7243/2050-120X-2-17