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Abstract:

The influence of different non-electrolytes (fructose, xylitol, glucose/mannitol mixture) and electrolytes (NACl, KCl) on anaerobic L-ascorbic acid (AA) degradation in an aqueous model system (pH 3.5, aw 0.94) was studied to assess the effect on that reaction of substances commonly used to diminish the water activity of fruit or vegetable juices, as well as its relation with non-enzymatic browning (NEB) development, at processing (70, 80, 90°C) and storage (24, 33, 45°C) temperatures. AA degraded as a function of time with a behaviour that could be described by first-order kinetics at all temperatures studied, and activation energies could be calculated using the Arrhenius law. The presence of humectants enhanced AA destruction, with D-fructose promoting the fastest L-ascorbic acid destruction and browning development at processing temperatures. The influence of humectants on NEB seemed to determine differences between their influence on AA degradation. Water activity decrease by humectant addition produced higher AA stability in solution at storage temperatures. The differential effect of each humectant used to decrease the water activity seemed to be related to its influence on solvent structure. © 2001 Society of Chemical Industry.

Registro:

Documento: Artículo
Título:Ascorbic acid destruction in aqueous mode systems: An additional discussion
Autor:Rojas, A.M.; Gerschenson, L.N.
Filiación:Departamento de Industrias, Fac. de Ciencias Exact. y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Ascorbic acid destruction; Browning; Dehydroascorbic acid; Vitamin C stability; food processing; Arrhenius
Año:2001
Volumen:81
Número:15
Página de inicio:1433
Página de fin:1439
DOI: http://dx.doi.org/10.1002/jsfa.961
Título revista:Journal of the Science of Food and Agriculture
Título revista abreviado:J. Sci. Food Agric.
ISSN:00225142
CODEN:JSFAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00225142_v81_n15_p1433_Rojas

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Citas:

---------- APA ----------
Rojas, A.M. & Gerschenson, L.N. (2001) . Ascorbic acid destruction in aqueous mode systems: An additional discussion. Journal of the Science of Food and Agriculture, 81(15), 1433-1439.
http://dx.doi.org/10.1002/jsfa.961
---------- CHICAGO ----------
Rojas, A.M., Gerschenson, L.N. "Ascorbic acid destruction in aqueous mode systems: An additional discussion" . Journal of the Science of Food and Agriculture 81, no. 15 (2001) : 1433-1439.
http://dx.doi.org/10.1002/jsfa.961
---------- MLA ----------
Rojas, A.M., Gerschenson, L.N. "Ascorbic acid destruction in aqueous mode systems: An additional discussion" . Journal of the Science of Food and Agriculture, vol. 81, no. 15, 2001, pp. 1433-1439.
http://dx.doi.org/10.1002/jsfa.961
---------- VANCOUVER ----------
Rojas, A.M., Gerschenson, L.N. Ascorbic acid destruction in aqueous mode systems: An additional discussion. J. Sci. Food Agric. 2001;81(15):1433-1439.
http://dx.doi.org/10.1002/jsfa.961