Nonenzymatic Browning of Amorphous Maltose/Whey Protein Isolates Matrix: Effects of Water Sorption and Molecular Mobility

Overview

Journal Foods

Specialty Biotechnology

Date 2022 Jul 27

PMID 35885371

Authors

Yaowen Wu

Haoxuan Ye

Fanghui Fan

Affiliations

Soon will be listed here.

Abstract

Nonenzymatic browning (NEB) reactions often affect the nutritional quality and safety properties of amorphous food solids. Developing a proper approach to control the NEB reaction has been of particular interest in the food industry. An NEB reaction in an amorphous maltose/Whey protein isolates (WPI) matrix containing L-lysine and D-xylose as reactants were studied at ambient temperatures ≤ 0.44 and 45~65 °C. The results indicated that the presence of NEB reactants barely disturbed the water sorption behavior of the matrix. The Guggenheim-Anderson-de Boer (GAB) constants and values of the studied samples were affected by storage conditions as the migration of sorbed water among monolayers occurred. The rate of color changes and 5-hydoxymethylfurfural (5-HMF) accumulation on the matrix were accelerated at high ambient temperatures , reflecting the extent of NEB reaction increases. Since the strength concept () could give a measure of molecular mobility, the extent of the NEB reaction was governed by the molecular mobility of the matrix as the activation energy () of 5-HMF production minimized at solids with high S values. We found that the concept had a considerable potential usage in controlling the NEB reaction on amorphous sugar-protein solids. This data set has practical significance in the comprehensive understanding of manipulating the diffusion-limited chemical reactions on low-moisture food solids.

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