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Live/Dead assay to check cytotoxicity of gelatin untreated (A), gelatin treated (B), gelatin-graphene oxide untreated (C), and microplasma treated gelatin-graphene oxide (D) using fluorescence staining methods (live/dead assay). Live cells and dead cells were fluorescently labelled green and red, respectively as visualized in the figure (scale bar 100 µm).
