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Updated: Sep 18, 2025

Mechanical Separation and Protein Solubilization of the Outer and Inner Perivitelline Sublayers from Hen's Eggs
Published on: January 27, 2021
Effect of egg yolk component and its enzymatic hydrolysate on the flavor and texture of walnut cake
Tingting Tang1, Qing Gao1, Junhua Li1
1State Key Laboratory of Food Science and Resources, Jiangnan University, Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, China.
Abstract:
The objective of this study was to decrease the vegetable oil content in walnut cake by partially substituting edible oil with egg yolk components and their enzymatic hydrolysates. The results showed that the hardness and elasticity of the dough were significantly reduced. After adding pepsin for enzymatic hydrolysis, the hardness and elasticity of the egg yolk liquid decreased to 479.14 g and 0.665, respectively. The aldehydes (hexanal, benzaldehyde) and pyrazines (methyl-pyrazine, pyrazine, 2-ethyl-6-methyl- pyrazine, trimethyl-pyrazine) increased significantly after the walnut cake was prepared, thus increasing the overall flavor of the walnut cake. In addition, the XRD and infrared spectroscopy results indicated that the incorporation of egg yolk components and their enzymatic hydrolysates led to an increase in the content of β-sheets and α-helices. This alteration modified the interaction modes among protein, lipid, and starch molecules within the egg yolk components, thereby enhancing the textural hardness of walnut cakes.
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