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17. October 2016
Abstract The present study focused on the preparation, physico-chemical, and biological characterization of several composite films containing graphene derivatives (graphene oxide or reduced graphene oxide) and curcumin as antioxidant in methylcellulose matrix. The morphostructural properties of the obtained composites were investigated by scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transformed infrared spectroscopy (FTIR), and X-ray powder diffraction (XRD). The...
15. October 2016
Abstract Electrostatic powder deposition (ESPD) has been developed as a solvent-free method to prepare pharmaceutical films. The aim of this work was to investigate the influence of process parameters during (1) electrostatic powder deposition, (2) curing, and (3) removal of the film from the substrate on the properties of the film. Polyethylene oxide (PEO) was used as the model polymer and stainless steel 316 as the substrate. Deposition efficiency (i.e. deposited weight) was measured with...
17. July 2016
Abstract Objectives: This study was conducted to evaluate suitable methods of testing crush-resistant tablets composed largely of thermoplastic polymers. The objectives were, i) to evaluate the effect of thermal processes on crush resistance, ii) to develop test method(s) to indicate whether a crush-resistant tablet is susceptible to tampering by insufflation based on generated particle sizes, and iii) to find an appropriate analytical tool for discriminatory studies. Methods: We investigated...
18. February 2016
Polyethylene oxide (PEO) has been extensively used as an extended-release excipient in matrix tablets due to its extraordinarily safe, stable, soluble, swellable and erodible properties. The present study aimed to develop once-daily sustained-release tablets using PEO for a highly water-soluble drug, diltiazem hydrochloride (DH), the clinical application of which is limited because of its short half-life in vivo. However, the prophase study demonstrated that the use of PEO alone could only...