NN Chopabayeva and KN Mukanov 2015. Synthesis and Characterization of Novel Nano-,Micro- and Macroporous Lignin Sorbents for Purification of Biological Fluids. Journal of Chemical Engineering Research Updates. 2, 1 (Apr. 2015), 1–11. DOI:https://doi.org/10.15377/2409-983X.2015.02.01.1.