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Abstract:

In this work we have studied the impact of the competitive adsorption of a whey protein concentrate (WPC) and three well characterized hydroxypropyl-methyl-cellulose (HPMCs), commercially known as E4 M, E50LV and F4 M, on the surface dilatational properties (surface dilatational modulus, E, surface dilatational elasticity, Ed, and loss angle tangent, tan δ) of mixed films adsorbed at the air-water interface. The increase in Ed values with adsorption time could be associated with biopolymer adsorption at the interface. The surface dilatational properties depend on the WPC and HPMC concentrations in the aqueous phase and on the WPC/HPMC ratio. Although the values of Ed were mainly determined by HPMC at short adsorption times, for mixed systems with the lowest protein concentration (1 × 10-4 wt%) the Ed values were close to those of HPMCs, even at long term adsorption. The values of tan δ indicate the formation of adsorbed mixed films with high viscoelasticity, with a gel structure, which in turn should be attributed to the association of biopolymer molecules occurring at the interface. Only one biopolymer is the dominant one in the solid character of these mixed systems. HPMC at high concentrations slightly reduced the long-term solid character of the films confirming the existence of competition for the air-water interface as expected with two surface-active biopolymers with high molecular weight. © 2009 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Surface dilatational properties of whey protein and hydroxypropyl-methyl-cellulose mixed systems at the air-water interface
Autor:Pérez, O.E.; Carrera Sánchez, C.; Pilosof, A.M.R.; Rodríguez Patino, J.M.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Química, Universidad de Sevilla, c/Profesor Garcia Gonzalez 1, 41012 Sevilla, Spain
Palabras clave:Adsorption; Air-water interface; Competitive adsorption; Hydroxypropyl-methyl-cellulose; Milk protein; Polysaccharide; Protein-polysaccharide mixed films; Surface dilatational properties; Surface rheology; Whey protein concentrate; Air-water interface; Competitive adsorption; Hydroxypropyl-methyl-cellulose; Milk protein; Surface rheology; Whey protein concentrate; Adsorption; Air; Biomolecules; Biopolymers; Cellulose; Cellulose films; Cements; Dewatering; Elasticity; Gelation; Plasticity; Polysaccharides; Rheology; Surface properties; Tanning; Viscosity; Phase interfaces; Adsorption; Air; Cellulose; Cellulose Film; Cement; Concentrates; Drainage; Elasticity; Gelation; Hydroxypropyl Methyl Cellulose; Milk; Plasticity; Polysaccharides; Proteins; Rheology; Surface Properties
Año:2009
Volumen:94
Número:3-4
Página de inicio:274
Página de fin:282
DOI: http://dx.doi.org/10.1016/j.jfoodeng.2009.03.019
Título revista:Journal of Food Engineering
Título revista abreviado:J Food Eng
ISSN:02608774
CODEN:JFOED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v94_n3-4_p274_Perez

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Citas:

---------- APA ----------
Pérez, O.E., Carrera Sánchez, C., Pilosof, A.M.R. & Rodríguez Patino, J.M. (2009) . Surface dilatational properties of whey protein and hydroxypropyl-methyl-cellulose mixed systems at the air-water interface. Journal of Food Engineering, 94(3-4), 274-282.
http://dx.doi.org/10.1016/j.jfoodeng.2009.03.019
---------- CHICAGO ----------
Pérez, O.E., Carrera Sánchez, C., Pilosof, A.M.R., Rodríguez Patino, J.M. "Surface dilatational properties of whey protein and hydroxypropyl-methyl-cellulose mixed systems at the air-water interface" . Journal of Food Engineering 94, no. 3-4 (2009) : 274-282.
http://dx.doi.org/10.1016/j.jfoodeng.2009.03.019
---------- MLA ----------
Pérez, O.E., Carrera Sánchez, C., Pilosof, A.M.R., Rodríguez Patino, J.M. "Surface dilatational properties of whey protein and hydroxypropyl-methyl-cellulose mixed systems at the air-water interface" . Journal of Food Engineering, vol. 94, no. 3-4, 2009, pp. 274-282.
http://dx.doi.org/10.1016/j.jfoodeng.2009.03.019
---------- VANCOUVER ----------
Pérez, O.E., Carrera Sánchez, C., Pilosof, A.M.R., Rodríguez Patino, J.M. Surface dilatational properties of whey protein and hydroxypropyl-methyl-cellulose mixed systems at the air-water interface. J Food Eng. 2009;94(3-4):274-282.
http://dx.doi.org/10.1016/j.jfoodeng.2009.03.019