Inhibition of PPO-related browning in fresh noodles: A combination of chemical and heat treatment

Yue Ma; Ting-Ting Hong; Dan Xu; Feng-Feng Wu; Xue-Ming Xu

doi:10.1016/j.foodchem.2022.134549

Inhibition of PPO-related browning in fresh noodles: A combination of chemical and heat treatment

Food Chem. 2023 Mar 15;404(Pt B):134549. doi: 10.1016/j.foodchem.2022.134549. Epub 2022 Oct 10.

Authors

Yue Ma¹, Ting-Ting Hong¹, Dan Xu², Feng-Feng Wu², Xue-Ming Xu³

Affiliations

¹ State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China.
² State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China; International Joint Laboratory on Food Safety, Synergetie Innovation Center of Food Satety and Nutrition, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China.
³ State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China; International Joint Laboratory on Food Safety, Synergetie Innovation Center of Food Satety and Nutrition, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China. Electronic address: xmxu@jiangnan.edu.cn.

PMID: 36283307
DOI: 10.1016/j.foodchem.2022.134549

Abstract

Enzymatic browning has been a significant factor affecting the sale of fresh noodles. This study used a combination of physical and chemical methods to achieve a long-lasting and effective anti-browning effect in fresh noodles. The results showed that the combinations of citric acid (CA), NaOH, and KOH with heat treatment blunted the polyphenol oxidase activity and improved the color of fresh noodles. Specifically, the L* value of fresh noodles stored at 6 °C treated by the combination of CA and 75 °C (CHFN-75) at 72 h (81.71) was significantly higher than that of the control at 72 h (74.42). Mixolab and confocal laser scanning microscopy showed that the combined treatment affected the protein and starch of the flour. However, the hardness and chewiness of the cooked noodles increased only slightly, and the adhesiveness decreased slightly. The innovative combination can be used as an effective way to delay the darkening of fresh noodles.

Keywords: Anti-browning agent; Enzymatic browning; Fresh noodles; Heat treatment; Shelf life.

MeSH terms

Cooking
Flour / analysis
Hot Temperature*
Starch
Triticum*

Substances

Starch