Fig. 2.

The humic (A) and shilajit (B) materials clustering based on SI and EC50: (A) blue squares – HA from coal; green triangles – HA, HMA and HFA from peloid, red rhombuses – HA and HFA from peat, purple square – oxidized lignin, orange hexagon – FA of various sources of origin. (B) Green, red, and blue colors are shown separating different array clusters of shilajit samples. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)