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. 2016 Mar 17;9(3):206. doi: 10.3390/ma9030206

Figure 1.

Figure 1

Scanning electron microscopy (SEM) images of carbon fibercarrier with raw and treated morphology and immobilized C. tropicalis (a) CF carrier without oxidation by nitric acid; (b) CF carrier after exposure to nitric acid treatment for 3 h; (c) CF carrier after exposure to nitric acid treatment for 6 h; (d) CF carrier without treatment immobilized with C. tropicalis; (e) Immobilized C. tropicalis by CF carrier treated with nitric acid for 3 h; (f) Immobilized C. tropicalis by CF carrier treated with nitric acid for 6 h.