Solvent Evaporation Technique
Mostrando 13-24 de 45 artigos, teses e dissertações.
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13. Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) nanoparticles prepared by a miniemulsion/solvent evaporation technique: effect of phbv molar mass and concentration
Miniemulsification and emulsion/solvent evaporation techniques were combined to produce poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) nanoparticles. Those nanoparticles were prepared with different PHBV molar masses and PHBV concentrations to verify their effect on the final particle size. Nanoparticles with an average diameter of 133 nm were obtained
Braz. J. Chem. Eng.. Publicado em: 2013-06
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14. In vitro degradation of Poly-L-co-D, L-lactic acid membranes
Poly-L-co-D.L-lactic (PLDLA) is a bioresorbable polymer whose properties have been studied for degradation sensitivity and its application in medicine. In this study, the potential of PLDLA membranes for temporary implantation was evaluated. PLDLA membranes were prepared with the solvent evaporation technique and characterized by differential scanning calori
Mat. Res.. Publicado em: 13/11/2012
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15. Characterization and in vitro release of cyclosporine-A from poly(D,L-lactide-co-glycolide implants obtained by solvent/extraction evaporation
Cyclosporine-A-loaded PLGA implants were developed intended for ocular route. Implants were prepared using solvent extraction/evaporation technique followed by casting of the cake into rods in a heated surface. XRD patterns showed that cyclosporine-A was completely incorporated into PLGA. FTIR and DSC results indicated alterations on drug molecular conformat
Química Nova. Publicado em: 2012
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16. Physicochemical characterization of a hydrophilic model drug-loaded PHBV microparticles obtained by the double emulsion/solvent evaporation technique
Micropartículas de poli(3-hidroxibutirato-co-3-hidroxivalerato) (PHBV) contendo um fármaco modelo hidrofílico, o cloridrato de metformina (MH), foram obtidas pela técnica de emulsão múltipla/evaporação do solvente. Diversas formulações foram preparadas, com o objetivo de investigar a influência de cada composição sobre a eficiência de encapsula
Publicado em: 2010
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17. Physicochemical characterization of a hydrophilic model drug-loaded PHBV microparticles obtained by the double emulsion/solvent evaporation technique
Micropartículas de poli(3-hidroxibutirato-co-3-hidroxivalerato) (PHBV) contendo um fármaco modelo hidrofílico, o cloridrato de metformina (MH), foram obtidas pela técnica de emulsão múltipla/evaporação do solvente. Diversas formulações foram preparadas, com o objetivo de investigar a influência de cada composição sobre a eficiência de encapsula
J. Braz. Chem. Soc.. Publicado em: 2008
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18. A low-cost ultrasonic spray dryer to produce spherical microparticles from polymeric matrices
The spray-drying technique has been widely used for drying heat-sensitive foods, pharmaceuticals, and other substances, because it leads to rapid solvent evaporation from droplets. This method involves the transformation of a feed from a fluid state into a dried particulate, by spraying the feed into a hot medium. Despite being most often considered a dehydr
Química Nova. Publicado em: 2007
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19. Filmes finos de iodeto de chumbo como detector de raios-X para imagens médicas / Lead Iodide Thin Films as X-ray detectors for Medical Imaging
In the last few years, great interest has been focused to high atomic number and wide band gap semiconductor materials for applications in room temperature ionizing radiation detection using the direct detection method. Some materials such as PbI2, HgI2, TlBr, CdTe and CdZnTe are good photoconductors and can be used at room temperature. As a good candidate,
Publicado em: 2007
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20. Growth of mercuric iodide crystals
Mercuric Iodide (HgI2) is a semiconductor candidate for the construction of X- and gamma-ray detectors for digital medical imaging due to its high atomic number (Z Hg = 80, Z I = 53). Also, HgI2 has a wide optical band-gap (2.13 eV) and high photon absorption coefficient for high-energy radiation. Different structures can lead to varying electrical and optic
Brazilian Journal of Physics. Publicado em: 2006-06
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21. ProduÃÃo de heterojunÃÃes de polianilina/silÃcio e nanofibras de polianilina para aplicaÃÃes em dispositivos hÃbridos
In this work we develop the methodology for the synthesis and fabrication of Polyaniline (PANI) â Silicon (Si) heterojunctions, with great potential for technological applications as sensors in different areas such as optics, ionizing radiation and gas detection. Besides, we were able to implement the electrospinnin technique with the goal of producing poly
Publicado em: 2006
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22. Mercuric iodide (HgI2) for applications in radiation detectors / Iodeto de mercúrio (HgI2) para aplicações em detectores de radiação.
Recently, attention has been devoted to the study of mercuric iodide (HgI2) because this material is a strong candidate for the development of X- and γ -ray detectors. This material has an optical gap of 2.13 eV, high atomic number (ZHg = 80; ZI = 53) and high absorption coefficient for radiation in the wavelength region of X- and γ rays. When so
Publicado em: 2005
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23. Atividade hipoglicemiante da trans-desidrocrotomia estraÃda do Croton Cajucara encapsulada em microesferas de copolÃmero de Ãcido lÃctico e glicÃlico
This work aims the achievement of PLGA microparticles containing DCTN, their physicochemical characterization as well as the evaluation of their in vitro kinetics profile and in vivo hypoglicemic activity. The PLGA microspheres were obtained by a multiple emulsion technique followed by solvent evaporation. The microspheres morphology were evaluated by light
Publicado em: 2005
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24. PreparaÃÃo e caracterizaÃÃo de microesferas de copolÃmeros de Ãcido lÃtico e glicÃlico (PLGA) contendo sulfato de quinina
The aim of this work is the development of new microencapsulated formulations of quinine sulphate intended for the antimalarial therapy. The physicochemical characterization of these microparticles, their in vitro kinetic release, preliminary stability study, and their in vivo antimalarial activity were evaluated. The poly- lactide-co-glycolide microspheres
Publicado em: 2004