Figure 1. (A) Representative of a fresh alginate hydrogel sample made by wet spinning, (B–F) are pictures (left) and SEM micrographs (right) of dry samples: (B) control (air pressure = 6 bar, needle diameter = 150 μm, calcium concentration = 0.5 w/v%, alginate concentration = 1.5 w/v%), (C) sample P (air pressure = 6 bar), (D) sample D (needle diameter = 200 μm), (E) sample Ca (calcium concentration = 5 w/v%), (F) sample A (alginate concentration = 3 w/v%).