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Cumulative percent release of insulin nanoparticles prepared with different molecular weight of chitosan. NP 1 Nanoparticles containing low MW chitosan (-♦-); NP 2 Nanoparticles containing medium MW chitosan (-■-); NP 3 Nanoparticles containing high MW chitosan (-▲-); NP 4 Nanoparticles containing mixture (2:1) of low and high Mw chitosan (-×-); Physical mixture containing drug and polymers (Eudragit L100-55 and chitosan)(-ж-). Each data point represents mean±SD (n = 3)
