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. 2019 Aug 30;9(9):111. doi: 10.3390/membranes9090111

Figure 2.

Figure 2

Scanning electron micrograph images demonstrating. surface roughness of polyamide membranes. (A) scale = 10 microns; courtesy of Mark Wilf. (B) scale = 2 microns; courtesy of Eric M.V. Hoek (reprinted with permission of Elsevier B.V.) [40].