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H929 cell morphology assessment after 24 h of incubation with graphene family materials (GN, GO, and nGO) in comparison to the control group (C). Live images in bright field and phase contrast and after staining with May-Grünwald and Giemsa (MGG) method. All pictures were taken under the same magnification (200×). Parts of the selected pictures for the GO group are additionally magnified for clearer visualization of the GO flakes.
