Ascorbic acid destruction in aqueous mode systems: An additional discussion

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...

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Autor principal: Rojas, A.M
Otros Autores: Gerschenson, L.N
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2001
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030 |a JSFAA 
100 1 |a Rojas, A.M. 
245 1 0 |a Ascorbic acid destruction in aqueous mode systems: An additional discussion 
260 |c 2001 
270 1 0 |m Gerschenson, L.N.; Departamento de Industrias, Fac. de Ciencias Exact. y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina; email: lia@di.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a 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.  |l eng 
593 |a Departamento de Industrias, Fac. de Ciencias Exact. y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina 
690 1 0 |a ASCORBIC ACID DESTRUCTION 
690 1 0 |a BROWNING 
690 1 0 |a DEHYDROASCORBIC ACID 
690 1 0 |a VITAMIN C STABILITY 
690 1 0 |a FOOD PROCESSING 
690 1 0 |a ARRHENIUS 
700 1 |a Gerschenson, L.N. 
773 0 |d 2001  |g v. 81  |h pp. 1433-1439  |k n. 15  |p J. Sci. Food Agric.  |x 00225142  |w (AR-BaUEN)CENRE-421  |t Journal of the Science of Food and Agriculture 
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