CEN425 DRUG DELIVERY SYSTEMS HOMEWORK 2 BERKAN SERIFOGLU 19290939 The Percentage release (%) vs time (days) graphic that is representing profile/kinetics of BMP-6; Percent Release % 35 30 25 20 15 10 5 0 0 5 10 15 20 25 30 Time (Days) The best mathematical model that can represent this drug release is Higuchi Model. The reason is: In the data, we have 0 values, in log 0 gives undefined answer. Because of that I cannot use the models which uses logarithm (1st order Model and Korsmeyer-Peppas Model). I tried the Zero Order Modelling, Higuchi Modelling and Hixon Crowell Modelling. As we can see from the graphs, best modelling is Higuchi modelling, 𝑅 2 = 0,8993. If the 𝑅 2 is getting closer to 1, we can say that modelling is the best for the drug releasing. 35