24 documents found, page 1 of 3
Xyloglucan and Concanavalin A based dressings in the topical treatment of mice ...
Arruda, Isabel R. S.; Souza, Marthyna P.; Soares, Paulo A. G.; Albuquerque, Priscilla B. S.; Silva, Túlio D.; Medeiros, Paloma L.; Silva, Marcia V.For medical biomaterials, xyloglucan dispersions can form films or gels to be applied as a wound dressing. For this purpose, the structural characterization of xyloglucan dressing (XG) and xyloglucan dressing containing 0.5 mg/mL of concanavalin A (XGL) was performed. The lectin release capacity and stability, cytotoxicity, and pro-wound healing effects were also investigated. XG and XGL films were prepared by ...
Xyloglucan from Hymenaea courbaril var. courbaril seeds as encapsulating agent ...
Farias, Mirla D. P.; Albuquerque, Priscilla B. S.; Soares, Paulo A. G.; Sá, Daniele M. A. T. de; Vicente, A. A.; Carneiro-da-Cunha, Maria G.This study evaluated the l-ascorbic acid (AA) encapsulation in microparticles of xyloglucan (XAA) extracted from Hymenaea courbaril seeds by spray drying (SD) and its application in tilapia fish burgers. The encapsulation efficiency was 96.34 ± 1.6% and the retention of the antioxidant activity was of 89.48 ± 0.88% after 60 days at 25 °C. SEM images showed microspheres with diameters ranging from 4.4 to 34.0 m....
Construction of a biocompatible and antioxidant multilayer coating by layer-by-...
Souza, M.; Vaz, Antônio F. M.; Costa, Thacianna B.; Cerqueira, Miguel Ângelo Parente Ribeiro; De Castro, Célia M. M. B.; Vicente, A. A.The present work aimed at the construction and characterization of a multilayer coating based on -carrageenan and quercetin-loaded lecithin/chitosan nanoparticles (Np) by the layer-by-layer technique and the evaluation of its antioxidant capacity and potential cytotoxicity in vitro. The multilayered coating was successfully self-assembled, as confirmed by UV-Vis spectroscopy, contact angle, atomic force microsc...
Immobilization of bioactive compounds in Cassia grandis galactomannan-based fil...
Albuquerque, Priscilla B. S.; Cerqueira, Miguel A.; Vicente, A. A.; Teixeira, J. A.; Carneiro-da-Cunha, Maria G.Galactomannan extracted from Cassia grandis seeds was used for the production of films containing different concentrations of the bioactive compounds lactoferrin (LF), bioactive peptides (BAPs), and phytosterols. SEM, FTIR, mechanical and thermal properties, colour, moisture content (MC), solubility, water vapour permeability (WVP), and contact angle (CA) were performed evaluating the effect of increasing conce...
Healing activity evaluation of the galactomannan film obtained from Cassia gran...
Albuquerque, Priscilla B. S.; Soares, Paulo A. G.; Aragão-Neto, Adelmo C.; Albuquerque, Giwellington S.; Silva, Luís C. N.; Lima-Ribeiro, Maria H. M.Galactomannan films from Cassia grandis seeds, associated or not with Cramoll 1,4, were used on topical wounds of rats for the evaluation of the healing process during 14 days. All of the films were evaluated by cytotoxic assay, FTIR and lectin hemagglutinating activity (HA). Forty-five male rats were submitted to aseptic dermal wounds (Ø = 0.8 cm) and divided in groups (n = 15): control, test 1, and test 2, tr...
Investigating a galactomannan gel obtained from Cassia grandis seeds as immobil...
Albuquerque, Priscilla B. S.; Silva, Caroline S.; Soares, Paulo A. G.; Barros Junior, Wilson; Correia, Maria T. S.; Coelho, Luana C. B. B.Characterization, with emphasis on the rheological properties, of Cassia grandis seeds galactomannan gel containing immobilized Cramoll 1,4 is presented. The gels, with and without immobilized Cramoll 1,4, were evaluated along time by rheometry, pH, color, microbial contamination and lectin hemagglutinating activity (HA). Rheological determinations confirmed the gels to be very stable up to 30 days with variati...
Development and characterization of lactoferrin-GMP nanohydrogels: evaluation o...
Bourbon, A. I.; Pinheiro, A. C.; Carneiro-da-Cunha, Maria G.; Pereira, Ricardo; Cerqueira, M. A.; Vicente, A. A.Lactoferrin (Lf) and glycomacropeptide (GMP), two bioactive proteins from milk, were used to produce nanohydrogels by electrostatic interaction and thermal gelation. Parameters such as protein concentration, molar ratio, pH, temperature and heating time were evaluated in order to develop the nanohydrogels, which were characterized in terms of morphology (Transmission Electron Microscopy TEM, Dynamic Light Scatt...
Effect of an edible nanomultilayer coating by electrostatic self-assembly on th...
Souza, Marthyna P.; Vaz, Antônio F. M.; Cerqueira, M. A.; Teixeira, J. A.; Vicente, A. A.; Carneiro-da-Cunha, Maria G.This work aims at evaluating the effect of an alginate-chitosan nanomultilayer coating, obtained by electrostatic layer-by-layer self-assembling, in the quality and shelf life of fresh-cut mangoes. Coated and uncoated fresh-cut mangoes were stored under refrigeration (8 °C) for 14 days. The changes in mass loss, titratable acidity, pH, ascorbic acid content, total soluble solids, malondialdehyde content, browni...
Development and characterization of an active chitosan-based film containing qu...
Souza, M.; Vaz, Antônio F. M.; Silva, H.; Cerqueira, M. A.; Vicente, A. A.; Carneiro-da-Cunha, Maria G.This work aims at developing an active chitosan film through the incorporation of quercetin and the evaluation of physical and functional properties of the films made thereof. The addition of quercetin showed to influence films properties in terms of surface morphology, tensile strength, and opacity while elongation-at-break, thickness, water vapor, and oxygen permeability were not significantly affected with i...
Characterization and rheological study of the galactomannan extracted from seed...
Albuquerque, Priscilla B. S.; Barros Junior, Wilson; Santos, Gustavo R. C.; Correia, Maria T. S.; Mourão, Paulo A. S.; Teixeira, J. A.Galactomannan extracted from seeds of Cassia grandis with 0.1 M NaCl, followed by ethanol precipitation, presented a yield of 36 ± 8%. The polysaccharide has a constant mannose/galactose ratio (2.44:1). Methylation analysis, one and two dimensional NMR spectroscopy confirmed that the polysaccharide has a central core composed of 4-linked β-mannose units, with branches of galactose, linked to the carbohydrate co...