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. 2019 Sep 14;11(9):476. doi: 10.3390/pharmaceutics11090476

Table 4.

Characteristics of blank and drug-loaded micelles. Micelle size reported is from DLS analysis; (n.d. = not determined).

Blank pH Zeta Potential (mV) Solubility (mg/mL) Size (nm) % Intensity PdI
T 6.00 ± 0.02 a −8.26 ± 4.03 - 13.86 ± 4.30 100.0% 0.132
TP 6.94 ± 0.01 −8.09 ± 1.87 - 19.93 ± 8.03 96.8% 0.205
P 7.22 ± 0.01 −3.32 ± 8.93 - See Table S2
Cyclosporine pH Zeta Potential (mV) Solubility (mg/mL) Size (nm) % Intensity PdI
T 6.82 ± 0.07 n.d. 4.84 ± 0.45 12.96 ± 4.03 100.0% 0.091
TP 6.88 ± 0.02 −0.02 ± 0.20 e 0.99 ± 0.23 20.31 ± 9.66 100.0% 0.192
P 7.04 ± 0.01 n.d. 0.57 ± 0.38 n.d.
Econazole Nitrate pH Zeta Potential (mV) Solubility (mg/mL) # Size % Intensity PdI
T 3.36 b ± 0.02 9.13 ± 1.48 3.69 ± 0.20 7.21 ± 2.15 100.0% 0.076
T c 5.1 d ± 0.14 n.d. n.d. 12.02 ± 3.58 100.0% 0.094
TP 4.23 ± 0.10 4.52 ± 1.68 4.15 ± 0.17 17.85 ± 8.50 99.5% 0.19
P 4.23 ± 0.10 −0.71 ± 1.48 3.79 ± 0.56 n.d.
Dexamethasone pH Zeta Potential (mV) Solubility (mg/mL) # Size % Intensity PdI
T 6.54 ± 0.16 −11.39 ± 2.94 0.59 ± 0.03 13.44 ± 4.29 97.7% 0.165
TP 6.94 ± 0.02 −10.55 ± 4.69 0.53 ± 0.09 21.39 ± 11.54 99.6% 0.222
P 7.10 ± 0.03 −10.99 ± 3.30 1.11 ± 0.10 n.d.

measured at 36 days; # measured at 30 days; a blank T micelles brought to pH 3.3 have a comparable size (11.7 ± 2.4 nm); b at this pH, the logD is 2.4 and the % of unionized form is about 0.08% [30]; c addition of NaOH 0.5 M; d at this pH, the logD is 4.4 and the % of unionized form is about 8% [30]; e from a previous work [7], sample dilution 1:20.