Fig. 11. MTT assays at 24 h (a) and 48 h (b). The samples are identified with a number (1 for MWCNT–Alg–drug 10 : 1 ratio 2 for MWCNT–Alg–drug 1 : 1 ratio, 3 nanoaggregates–drug complex, 4 for nanospheres–drug complex) and a letter (B for the samples without drug, S for the samples charged with serotonin and T for the samples charged with 5-HTP).
