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. 2021 Mar 7;13(3):349. doi: 10.3390/pharmaceutics13030349

Table 1.

Diffusion exponent and respective drug-release mechanism [39].

Diffusion Exponent ( n ) Drug-Release Mechanism
0.5 Fickian diffusion
0.5 > n < 1.0 Non- Fickian or anomalous transport
1.0 Case-II transport
>1.0 Super case-II transport