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Attachment-independent growth and morphological transformation assessment of MWCNTs. (A) and (B) UFCB and MW-NHx at 8 weeks displayed significant increase in number of soft agar colonies compared to controls (n = 9). Bar = 100 µm. Bars represent mean ±SE. (C) Foci in a morphological transformation assay (n = 9). White arrow = Type II focus; Bar = 500 µm. * indicate significant difference vs. SURV control (p ≤ .05).
