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Physical and chemical properties of bio-scaffolds. (a): SEM of bio-scaffolds; (a1–a3) 0%GR scaffold, (b1–b3) 0.024%GR scaffold, (c1–c3) 0.06%GR scaffold, (d1–d3) 0.1%GR scaffold, (a1–d1) 50×, (a2–d2) 200×, (a3–d3) 800×; (b): Polarized microscope of bio-scaffolds. (a1,a2) 0%GR scaffold, (b1,b2) 0.024%GR scaffold, (c1,c2) 0.06%GR scaffold, (d1,d2) 0.1%GR scaffold; (c): EDS of bio-scaffolds. (a1) 0%GR scaffold, (a2) 0.024%GR scaffold, (a3) 0.06%GR scaffold, (a4) 0.1%GR scaffold.
