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The browning kinetics of the non-enzymatic browning reaction in L-ascorbic acid/basic amino acid systems Ciênc. Tecnol. Aliment.
YU,Ai-Nong; LI,Ya; YANG,Yan; YU,Ke.
Abstract Under the conditions of weak basis and the reaction temperature range of 110-150 °C, lysine, arginine and histidine were reacted with L-ascorbic acid at equal amount for 30-150 min, respectively and the formation of browning products was monitored with UV–vis spectrometry. The kinetic characteristics of their non-enzymatic browning reaction were investigated. The study results indicated that the non-enzymatic browning reaction of these three amino acids with L-ascorbic acid to form browning products was zero-order reaction. The apparent activation energies for the formation of browning products from L-ascorbic acid/lysine, L-ascorbic acid/arginine and L-ascorbic acid/histidine systems were 54.94, 50.08 and 35.31kJ/mol. The activation energy data...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Kinetics; Non-enzymatic browning reaction; Ascorbic acid; Maillard reaction; Amino acid.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000300537
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The effects of reactants ratios, reaction temperatures and times on Maillard reaction products of the L-ascorbic acid/L-glutamic acid system Ciênc. Tecnol. Aliment.
ZHOU,Yong-Yan; LI,Ya; YU,Ai-Nong.
Abstract The transformation law of the Maillard reaction products with three different reactants ratios - equimolar reactants, excess L-glutamic acid and excess L-ascorbic acid reaction respectively, five different temperatures, and different time conditions for the L-ascorbic acid / L-glutamic acid system were investigated. Results showed that, the increase of the reaction time and temperature led to the increase of the browning products, uncoloured intermediate products, as well as aroma compounds. Compared with the equimolar reaction system, the excess L-ascorbic acid reaction system produced more browning products and uncoloured intermediate products, while the aroma compounds production remained the same. In the excess L-glutamic acid system, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Maillard reaction; Ascorbic acid; Glutamic acid; Aroma compound; Browning product.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000200268
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