Fig. 5
From: Gemcitabine-incorporated polyurethane films for controlled release of an anticancer drug
Cumulative release of gemcitabine from GPU films plotted against “square root of time.” The linear region of cumulative release relative to the “square root of time” decreased when the GPU film was sandwiched in between the silicone and polyurethane films (Si-GPU-PU) or two homo polymer polyurethane films (PU-GPU-PU)
