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Percentages of cellular uptake in A549 cancer cell line of NBC-PEG, NBC-FA, NBC-B and NBC-R at the concentrations of 50 and 100 µg mL−1. The percentages were calculated with respect to the total emission values (i.e., those recorded before the medium was removed and the monolayers were washed to eliminate the non-internalized NBC-TL). Each value represents the mean (±SD) of the experiments performed in triplicate.
