title: Glass transition study in model food systems prepared with mixtures of fructose, glucose, and sucrose.
abstract: The glass transition temperature of model food systems prepared with several glucose/fructose/sucrose mass fractions was studied using differential scanning calorimetry (DSC). A distance-based experimental design for mixtures of 3 components was used to establish the proportion of sugars of the model systems. Thus, 32 compositions including individual sugars and sugar mixtures, both binary and ternary were prepared and analyzed. Thermograms showing the complete process of heating-cooling-reheating were used to determine the precise glass transition temperature during cooling (T(g)(c)) or reheating (T(g)(H) in amorphous sugars. The Scheffe cubic model was applied to experimental results to determine the influence of sugar composition on the glass transition temperature (P < 0.05). The final model proved to be appropriate (R(2) > 0.97, CV < 9%, model significance <0.0001) to predict the T(g) values of any dry mixture of amorphous fructose, glucose, and sucrose.
authors.affiliation: Facultad de Ciencias Químicas. Univ. Autónoma de San Luis Potosí. Av. Dr. Manuel Nava No. 6, Zona Universitaria, C.P. 78210, San Luis Potosí, Mexico.
authors.forename: M Z
authors.initials: MZ
authors.lastname: Saavedra-Leos
authors.forename: A
authors.initials: A
authors.lastname: Grajales-Lagunes
authors.forename: R
authors.initials: R
authors.lastname: González-García
authors.forename: A
authors.initials: A
authors.lastname: Toxqui-Terán
authors.forename: S A
authors.initials: SA
authors.lastname: Pérez-García
authors.forename: M A
authors.initials: MA
authors.lastname: Abud-Archila
authors.forename: M A
authors.initials: MA
authors.lastname: Ruiz-Cabrera
mesh_terms: D002152:Calorimetry, Differential Scanning / Q000379:methods; D003460:Crystallization; D005511:Food Handling; D005524:Food Technology; D005632:Fructose / Q000032:analysis*; D005638:Fruit / Q000737:chemistry; D005947:Glucose / Q000032:analysis*; D008962:Models, Theoretical; D012044:Regression Analysis; D013395:Sucrose / Q000032:analysis*; D013816:Thermodynamics; D044366:Transition Temperature; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D005632:Fructose; D013395:Sucrose; D005947:Glucose