数字农科院2.0

Quantitative conversion of free, acid-hydrolyzable, and bound ellagic acid in walnut kernels during baking

文献类型: 外文期刊

作者: Guo X.; Gu F.; Yang T.; Shao Z.; Zhang Q.; Zhu J.; Wang F.

作者机构:

关键词: Acid content; Acid precursors; Baking; Ellagitannin; Free acids; Phenolic acids; Physiological functions; Polyphenols; Urolithins; Walnut kernel; Ellagic acid; acetonitrile; ellagic acid; ellagitannin; polymer; polyphenol; hydroxybenzoic acid derivative; phenolic acid; tannin; Article; baking (cooking); bioavailability; biological activity; controlled study; flow rate; high performance liquid chromatography; industrial production; liquid chromatography-mass spectrometry; nutritional value; quantitative analysis; sensory evaluation; supernatant; time of flight mass spectrometry; walnut; metabolism; Ellagic Acid; Hydrolyzable Tannins; Hydroxybenzoates; Juglans

期刊名称: Food Chemistry

ISSN: 0308-8146

年卷期: 2023 年 400 卷

页码:

收录情况: SCIE(2023版) ; ; EI(2023版)

摘要: Ellagitannins, the main components of walnut kernel polyphenols, are easily degraded by heating to produce ellagic acid, precursor in the production of urolithins that show multiple physiological functions. To analyze the conversion of ellagitannins to free ellagic acid in walnut kernels during baking, a quantitative method was developed to investigate the ellagic acid content (EAC) in free phenolic acid (FPA), acid-hydrolyzable phenolic acid (AHPA), and bound phenolic acid (BPA) fractions. The results showed that the EAC in FPA reached its maximum (5.17 ± 0.30 mg/g DW) after baking at 165 °C for 30 min, which increased by 99.52% compared with the control. Meanwhile, the content of ellagitannins (ETC) in AHPA and BPA dropped by 89.14% and 26.08%, respectively. It suggested that baking promoted the conversion of ellagitannins in AHPA and BPA to ellagic acid in FPA. Eight ellagitannins were regarded as the main precursors of ellagic acid in walnut kernels. © 2022 Elsevier Ltd

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