Several reported that proton-conducting polymer electrolytes are complexes with strong inorganic acid such as
H3PO3, H2SO4 and HCl or ammonium salts such as NH4Br, NH4SO4, NH4I and NH4ClO with commercially available electron donor polymer such as PEO, PVA, PAA and PEI.
Bold basal medium [NaNO3 (0.250 g/L), CaCl2.2H2O (0.0250 g/L), MgSO4.7H2O (0.0750 g/L), K2HPO4 (0.075 g/L), KH2PO4 (0.175 g/L), NaCl (0.025 g/L), EDTA (0.050 g/L), KOH (0.031 g/L), FeSO4 .7H2O (0.0498 g/L), H2SO4 (0.001 ml/L),
H3PO3 (0.01142 g/L), ZnSO4.7H2O (0.00881 g/L), MnCl2.4H2O (0.00144 g/L), MoO3 (0.00071 g/L) CuSO4.5H2O (0.00157 g/L) and Co(NO3)2.6H2O (0.00049 g/L)], diluted 1:1000 with distilled water was used for culturing protozoa.