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. 2016 Jul 21;6:29999. doi: 10.1038/srep29999

Figure 2. High resolution XRF elemental maps of P, S and Zn. Scanned area 4.5 × 3.2 μm, beam dimensions 50 × 50 nm2, 20 nm step size, measurement time 0.1 s per point.

Figure 2

CLRs image shows the result of k-means clustering into three clusters (white = cytoplasm, red = euchromatine, black = heterochromatine), primary beam energy 17.5 keV.