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- W2144459851 abstract "In the present work the arrangement of nanostructured nimesulide embedded inside crospovidone microparticles is experimentally studied. The analysis was carried out by observing cross-sections of the microparticles with electron and Raman microscopes. Scanning electron microscopy (SEM) gave a morphological picture of the cross-sections, energy dispersive X-ray spectroscopy (EDS) allowed to investigate the nimesulide distribution at molecular level in- and outside the crospovidone matrix, and microRaman spectroscopy (μRaman) shed some light on the nimesulide phase composition. The drug resulted to be constrained by crospovidone into three main arrangements: an amorphous phase dispersed into the molecular cross-linked network of the polymer, nanocrystals wrapped up by the polymer, and drug layers, made of micro- and nanocrystals, segregated onto the popcorn-like surface of the polymer. According to X-ray diffraction data, the micro- and nanocrystals are highly disordered and made of crystallites with an average diameter of 17 nm." @default.
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- W2144459851 date "2005-04-01" @default.
- W2144459851 modified "2023-09-26" @default.
- W2144459851 title "Microstructure and morphology of nimesulide/crospovidone nanocomposites by Raman and electron microscopies" @default.
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- W2144459851 doi "https://doi.org/10.1016/j.compositesa.2004.10.006" @default.
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