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Scanning electron micrographs and particle size frequency distributions of nanoclay and control microspheres. (a) L0 undoped nanoclay composition, (b) LTA2.5 nanoclay composition doped with 2.5 mg ml−1 tranexamic acid, (c) LTA4 nanoclay composition doped with 4 mg ml−1 tranexamic acid, (d) LTA5 nanoclay composition doped with 5 mg ml−1 tranexamic acid, and (e) Arista control. Bar: 200 μm
