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Effect of cellulose nanofibers(CNF) on (a) NCIH 460 (lung carcinoma) (b) PA-1 (human teratocarcinoma) and (c) L132 (normal embryonic tissue) cell viability after 24 h incubation at different concentrations (10-1000 μg/ml). The results are expressed as Mean ± standard deviation from independent experiments (n = 3). A p value (PDT) of <0.05 was considered to be significant compared to negative control
