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(A) Photograph of CNPs-PI-Alg (left) and Blank-Alg gel (right), (B) Injectability of CNPs-PI-Alg gel, FEG-SEM images of (C1,C2) Blank-Alg gel and (D1,D2) CNPs-PI-Alg gel; red arrow indicates CNPs. Reproduced with permission from [79], International Journal of Biological Macromolecules, 2018.
