title: Characterization of amino cross-linked soy protein hydrogels.
abstract: This study focused on amino cross-linking as means of forming soy protein hydrogels with modifiable properties. The efficiency of glyceraldehyde, a potential food-grade cross-linking agent, was compared to glutaraldehyde, a well-known dialdehyde. The influence of the concentration of these agents on the degree of cross-linking as well as macroscopic and supramolecular properties was studied. The effect of increasing the cross-linker concentration was mainly an increase in degree of cross-linking and gel storage modulus (G') and a decrease in gel swelling ratio and increase in gel deswelling ratio. However, the cross-linking influence was less pronounced in the case of glyceraldehyde. Glutaraldehyde displayed greater ability to form hydrogels with modifiable properties. Finally, electron micrographs suggested that cross-linking agent type had no impact on gel microstructure.
authors.affiliation: Chaire de recherche du Canada sur les protéines, les biosystèmes et les aliments fonctionnels, Inst. des nutraceutiques et aliments fonctionnels (INAF), Faculté des Sciences de l'Agriculture et de l'Alimentation, Univ. Laval, Pavillon Paul Comtois, Québec.
authors.forename: R
authors.initials: R
authors.lastname: Caillard
authors.forename: G E
authors.initials: GE
authors.lastname: Remondetto
authors.forename: M A
authors.initials: MA
authors.lastname: Mateescu
authors.forename: M
authors.initials: M
authors.lastname: Subirade
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004591:Electrophoresis, Polyacrylamide Gel; D005976:Glutaral / Q000737:chemistry*; D005985:Glyceraldehyde / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry; D012212:Rheology; D030262:Soybean Proteins / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D000596:Amino Acids; D003432:Cross-Linking Reagents; D020100:Hydrogels; D030262:Soybean Proteins; D005985:Glyceraldehyde; D005976:Glutaral