Artículos de revistas
Functional properties of gelatin-based films containing Yucca schidigera extract produced via casting, extrusion and blown extrusion processes: A preliminary study
Registro en:
Journal of Food Engineering. Elsevier, v.113, n.1, p.33-40, 2012
0260-8774
WOS:000306876400005
10.1016/j.jfoodeng.2012.05.031
Autor
Andreuccetti, Caroline
Carvalho, Rosemary A.
Galicia-Garcia, Tomas
Martinez-Bustos, Fernando
Gonzalez-Nunez, Ruben
Grosso, Carlos R. F.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Gelatin-based films containing both Yucca schidigera extract and low concentrations of glycerol (0.25-8.75 g per 100 g protein) were produced by extrusion (EF) and characterized in relation to their mechanical properties and moisture content. The formulations that resulted in either larger or smaller elongation values were used to produce films via both blown extrusion (EBF) and casting (CF) and were characterized with respect to their mechanical properties, water vapor permeability, moisture content, solubility, morphology and infrared spectroscopy. The elongation of the EF films was significantly higher than that of the CF and EBF films. The transversal section possessed a compact, homogeneous structure for all of the films studied. The solubility of the films (36-40%) did not differ significantly between the different processes evaluated. The EBF films demonstrated lower water vapor permeability (0.12 g mm m-(2) h(-1) kPa(-1)) than the CF and EF films. The infrared spectra did not indicate any strong interactions between the added compounds. Thermoplastic processing of the gelatin films can significantly increase their elongation; however, a more detailed assessment and optimization of the extrusion conditions is necessary, along with the addition of partially hydrophobic compounds, such as surfactants. (C) 2012 Elsevier Ltd. All rights reserved. 113 1 33 40 Gelita Mexico Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) ICyTDF - Mexico Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)