INVESTIGADORES
MAURI Adriana Noemi
artículos
Título:
Mechanical and physical properties of soy protein films with pH modified microstructures
Autor/es:
MAURI A.N.; AÑÓN M.C.
Revista:
FOOD SCIENCE AND TECHNOLOGY INTERNATIONAL
Editorial:
SAGE Publications
Referencias:
Año: 2008 p. 119 - 125
ISSN:
1082-0132
Resumen:
Mechanical, physical, and barrier properties of films obtained from soy protein isolate solutions
at different pH were studied and correlated with the structural properties and the microstructure of films.
Films obtained at pH 2 and 11, which had denser microstructures and a higher amount of disulfide bonds,
showed a higher tensile strength of about 1.05MPa and a higher Youngs modulus of at least
0.15MPa than the one at pH 8. However, films formed at alkaline pH (8 and 11) exhibited a higher
deformation than films at pH 2 by about 70%. The presence of at least a protein fraction in native state
allowed macromolecules to unfold during the mechanical test, reaching greater deformation before
breaking. Acidic films exhibited higher water vapor permeability of about 71011 g/m s Pa and water
content of about 1.5% and a lower glass transition temperature of at least 15 8C than basic ones,
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
content of about 1.5% and a lower glass transition temperature of at least 15 8C than basic ones,
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
content of about 1.5% and a lower glass transition temperature of at least 15 8C than basic ones,
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
1011 g/m s Pa and water
content of about 1.5% and a lower glass transition temperature of at least 15 8C than basic ones,
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
due to their higher hydrophilic nature.
8C than basic ones,
due to their higher hydrophilic nature.