Chemical modification of lignins - introducing of aminogroups. Thus the lignin is converted from polyacid to polybase, enabling its practical utilization in novel fields.
Some aminolignin preparations show the selective activity as bile acids absorbents in medicine.
G.Zakis, B.Neiberte, M.Meksa. Method for obtaining of lignin aminoderivates - acid sorbents. V.Smogol, L.Maksimova, A.Mayore, G.Zakis. Specific absorbtion activity of new international vegetations sorbent. V.Smogol, L.Maksimova, G.Zakis, B.Neiberte.