Fig. 4From: Palm kernel oil-based polyester polyurethane composites incorporated with multi-walled carbon nanotubes for biomedical applicationMorphology of normal human skin fibroblast cells (CRL2522, ATCC) on (a–c) the tissue culture polystyrene plate (TCPP), (d–f) polyurethane (PU) film (g–i) PU film containing 0.01 % wt % MWNT (PU-MWNT01), (j-l) PU film containing 0.04 % wt % MWNT (PU-MWNT04), m–o PU film containing 0.08 % wt % MWNT (PU-MWNT08) after cultured for 24, 48 and 72 h. p Cell proliferation of normal human skin cells growing on the TCPP, PU film, PU-MWNT01, PU-MWNT04, and PU-MWNT08 films after incubated for 24, 48 and 72 h. Error bars indicate standard deviation (n = 3)Back to article page