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. 2013 Feb 25;8:809–819. doi: 10.2147/IJN.S39615

Table 1.

Characterization of PEG-Chito-5-ALA nanoparticles

Polymer/5-ALA
weight ratio (mg/mg)
Drug contents (%, w/w)
Particle
size (nm)
Theoretical Experimental
Empty NPs 100/0 0 0.0 191
PEG-Chito-5-ALA NPs 90/10 10 2.8 194
80/20 20 5.6 211
60/40 40 9.3 219

Abbreviations: 5-ALA, 5-aminolevulinic acid; PEG-Chito-5-ALA NP, Polyethylene glycol-Chito-5-ALA nanoparticles; empty NPs, empty nanoparticles.