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Alginate hydrogels for cell encapsulation. Alginate hydrogel formed with 1.5% (w/v) sodium alginate in PBS, and various concentrations of CaCl2 or CaCO3:GDL (1:2 molar ratio). Gels formed with CaCO3:GDL show higher transparency. Gelation with CaCO3 and GDL results in improved transparency compared to CaCl2-crosslinked alginate gels at higher Ca2+ concentration.
