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Effects of gelatin-Ph and HA-Ph content on the width of hydrogel filaments extruded on a stage. (a) Values normalized by an outer diameter of an extrusion needle (400 μm). The linear velocity of the solution at the tip of the needle and the movement speed of the stage were set to be the same. Bars: S.D. (n = 8). * p < 0.05, ** p < 0.01. (b) Microphotographs of hydrogel filaments at typical conditions. Bars: 200 μm.
