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| Lima,Isabela Angeli de; Pomin,Suelen Plaza; Cavalcanti,Osvaldo Albuquerque. |
| ABSTRACT Free films of pullulan-polymethacrylate associations were produced by casting process to develop a novel target-specific material. For characterization, tests of water vapor permeability, swelling index, infrared absorption spectroscopy, thermogravimetric analysis, scanning electron microscopy and mechanical analysis were performed. The polysaccharide concentration directly influenced vapor permeability and swelling, increasing the values of the latter up to five times when added in a proportion of 20% (per weight). The individual properties of each polymer were maintained, and chemical interactions were not detected. The films were found to be thermally stable and they had unaltered mechanical properties with the addition of the polysaccharide.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Films; Polymeric material; Modified release/enteric release/oral delivery/controlled release; Glucans; Eudragit; Physicochemical characterization. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000300601 |
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| Reis,Camila Borges dos; Boff,Daniele Schaab; Lima,Isabela Angeli de; Santos,Leandro Freire dos; Calvalcanti,Osvaldo Albuquerque; Bunhak,Élcio José. |
| ABSTRACT Polymeric films associating different concentrations of Eudragit(r) FS 30 D (EFS) and chondroitin sulfate (CS) were produced by casting for the development of a new target-specific site material. Formed films kept a final polymer mass of 4% (w/v) in the following proportions: EFS 100:00 CS (control), EFS 95:05 CS, EFS 90:10 CS and EFS 80:20 CS. They were analyzed for physical and chemical characteristics using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and Raman spectroscopy. Furthermore, they were characterized by their water vapor permeability and degree of hydration at different conditions simulating the gastrointestinal tract. No chemical interactions were observed between CS and EFS, suggesting only a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polymeric films/smelting process; Eudragit(r) FS 30 D/modified delivery; Chondroitin Sulfate; Polymeric coating.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000400635 |
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| Lima,Isabela Angeli de; Khalil,Najeh Maissar; Mainardes,Rubiana Mara. |
| ABSTRACT The development and validation of a simple and efficient method for the quantification of ferulic acid in poly (D,L-lactide-co-glycolide) (PLGA) nanoparticles coated with chitosan (CS) by reverse phase high performance liquid chromatography coupled to photodiode array detection was described. For the chromatographic analysis, a reverse phase C-18 column was used, mobile phase consisting of acetonitrile and 0.5% acetic acid (37:63, v/v), isocratically eluted at a flow rate of 1 mL/min. Drug determination was performed at 320 nm. The method was validated in terms of the selectivity, linearity, precision, accuracy, robustness, limits of detection and quantification. The method was linear in the range of 10 to 100 μg/mL (r=0.999) and presented limit... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanoparticles; Ferulic acid/encapsulation efficiency; Ferulic acid/quantification; Stability; High performance liquid chromatography/validation; PLGA-poly(lactide-co-glycolide)/nanoparticles; Chitosan.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000200627 |
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