Figure 1

UV spectra of 5-FU/PEG-PBLG nanoparticles. I: 5-FU; II: 5-FU + PEG-PBLG nanoparticles; III: 5-FU/PEG-PBLG nanoparticles. I and II had high absorbance at 269 nm while the absorbance of III was much lower at 269 nm.