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Schematic diagram of the bioreactor for production of tubular BNC. (1) Airtight container full of oxygen, (2) outer silicone tube, (3) fermentation broth, (4) inner silicone tube, (5) hollow cylindrical silicone plug, (6) inlet of oxygen, (7) BNC layer synthesized on the inner surface of the outer silicone tube, and (8) BNC layer synthesized on the outer surface of the inner silicone tube.
