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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Functional properties of gelatin-based films containing Yucca schidigera extract produced via casting, extrusion and blown extrusion processes: A preliminary study

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Author(s):
Andreuccetti, Caroline [1] ; Carvalho, Rosemary A. [2] ; Galicia-Garcia, Tomas [3] ; Martinez-Bustos, Fernando [3] ; Gonzalez-Nunez, Ruben [4] ; Grosso, Carlos R. F. [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Dept Foods & Nutr, Fac Food Engn, BR-13083862 Campinas, SP - Brazil
[2] Univ Sao Paulo, Dept Food Engn, ZEA FZEA, BR-13635900 Pirassununga, SP - Brazil
[3] CINVESTAV, Unidad Queretaro, Queretaro 76001, Queretaro - Mexico
[4] Univ Guadalajara, Dept Chem Engn, Guadalajara 44430, Jl - Mexico
Total Affiliations: 4
Document type: Journal article
Source: Journal of Food Engineering; v. 113, n. 1, p. 33-40, NOV 2012.
Web of Science Citations: 11
Abstract

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. (AU)