کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5133335 | 1492057 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Glycine and reduced glutathione were used as anti-browning agents in parboiled rice.
- Glycine at 0.1% was able to increase parboiled rice whiteness.
- Reduced glutathione promoted whiteness when used at the levels of 1.0% and 2.0%.
- Free HMF content decreased when both anti-browning agents were used.
- Reduced glutathione decreased the cooking time of parboiled rice.
Browning occurs in parboiled rice as a result of the Maillard reaction that negatively affects consumers' acceptability. The aim of this study was to evaluate the ability of gallic acid, glycine, reduced glutathione and l-cysteine at 0.1, 0.5, 1.0 and 2.0% levels to inhibit browning reactions during the parboiling of rice. Gallic acid and l-cysteine did not exhibit browning inhibition effect at the studied levels. On the other hand, glycine and the higher concentrations of reduced glutathione (1.0 and 2.0%) were able to promote a whiter color and a low free 5-hydroxymethyl-2-furaldehyde content (HMF). The highest level of 2.0% for glycine and reduced glutathione favored protein extractability and a weaker protein-starch matrix, roughly increasing the broken grains percentage. Cooking time changed just for reduced glutathione-treated rice, as a result of their weaker protein-starch matrix and the greater ability of the grains to soften during cooking.
Journal: Food Chemistry - Volume 235, 15 November 2017, Pages 51-57