2. Materials and methods 2.1. Materials Alginic acid sodium salt (AA, viscosity 20–40 cps, 1% in H2O(lit.)) and agar (Ag, fine powder, viscosity range 5–50 cps) were kindly supplied by Sigma Aldrich
2. Materials and methods2.1. MaterialsAlginic acid sodium salt (AA, viscosity 20–40 cps, 1% inH2O(lit.)) and agar (Ag, fine powder, viscosity range 5–50 cps) werekindly supplied by Sigma Aldrich