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. 2018 Feb 8;11:31. doi: 10.1186/s13068-018-1035-x

Fig. 3.

Fig. 3

SEM images of the untreated and pretreated RS. a The untreated RS had a regular and intact morphology. b After Fenton pretreatment, the compact surface of RS was completely broken and formed a lot of mesh gullies. c After B-8 pretreatment, RS appeared a loose lamellar structure