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. 2022 Jun 14;15(12):4223. doi: 10.3390/ma15124223

Figure 8.

Figure 8

Figure 8

DOM surface morphology micrographs of surfaces after a 50-day exposition in 0.9 wt.% NaCl solution: (a) as received, (b) PEP, (c) PPEP (QBQ, magnification 600×).