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. 2022 Apr 29;8:33. doi: 10.1038/s41522-022-00300-4

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Fig. 6 — a biofilm (cells) on slides in the middle section of the channel. b EPS only on slides in the middle section of the channel. c biofilm on paper through which samples of the channel effluent was filtered. d EPS only on paper through which samples of the channel effluent was filtered.