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. 2019 Jun 15;12(12):1931. doi: 10.3390/ma12121931

Figure 1.

Figure 1

Images of collagen and alginate clusters. Collagen beads were created by two-step polymerization phases at 37 °C for 30 min (a). Alginate beads were formed by dropping jelly biomaterial in CaCl2 solution (b).