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• W2021072600 abstract "Using high-pressure homogenization and spray-drying techniques, novel formulations were developed for manufacturing dry powder for inhalation, composed of a mixture of micro- and nanoparticles in order to enhance lung deposition. Particle size analysis was performed by laser diffraction. Spray-drying was applied in order to retrieve nanoparticles in dried-powder state from tobramycin nanosuspensions. The aerolization properties of the different formulations were evaluated by a multi-stage liquid impinger. Suspensions of nanoparticles of tobramycin containing Na glycocholate at 2% (w/w) relative to tobramycin content and presenting a mean particle size about 200 nm were produced. The results from the spray-dried powders showed that the presence of nanoparticles in the formulations improved particle dispersion properties during inhalation. The fine particle fraction (percentage of particles below 5 μm) increased from 36% for the raw micronized tobramycin material to about 61% for the most effective formulation. These new nanoparticle-containing tobramycin DPI formulations, based on the use of very low level of excipient and presenting high lung deposition properties, offer very important perspectives for improving the delivery of drugs to the pulmonary tract." @default.
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• W2021072600 date "2009-01-05" @default.
• W2021072600 modified "2023-10-17" @default.
• W2021072600 title "Preparation and characterization of spray-dried tobramycin powders containing nanoparticles for pulmonary delivery" @default.
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• W2021072600 doi "https://doi.org/10.1016/j.ijpharm.2008.08.014" @default.
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