Fig. 1

Chemical structure of: (a) α-L-guluronate (G) and β-D-mannuronate (M) residues present in sodium alginate; (b) Crosslinking of alginate chains by calcium ions; (c) Poly (ethylene glycol) (400) diacrylate (PEGDA); (d) Crosslinked PEGDA; and e) general scheme of the synthesized capsules with the encapsulated blue dye.