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Production of Oligomeric Procyanidins by Mild Steam Explosion Treatment of Grape Seeds by Jie Zhang; Dan Liu; Aoke Wang; Li Cheng; Wenya Wang; Yanhui Liu; Sadeeq Ullah; Qipeng Yuan is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Production of Oligomeric Procyanidins by Mild Steam Explosion Treatment of Grape Seeds about?

## Background Sixty five percent of procyanidins in grape seeds is polymeric procyanidins (PPC), and they could not be assimilated directly by human. To enhance procyanidin assimilation, steam explosion treatment (SE) was used to facilitate the preparation of oligomeric procyanidins (OPC) from grape seeds. ## Results The results indicate that SE treatment made grape seeds loose and porous, and decreased the mean degree of polymerization (mDP) of procyanidins. The procyanidins content and total phenolic content (TPC) were decreased with the increase of SE severity, while the amount of catechin (CA), epicatechin (EC) and epicatechin-3-O-gallate (ECG) were increased, resulting in significant increase of antioxidant activity. ## Conclusions Although SE treatment could depolymerize PPC and produce CA/EC/ECG with high yield, it caused the yield loss of total procyanidins. SE treatment is a potential effective method to prepare procyanidins with low degree of polymerization and high antioxidant activity. However, it still needs to study further how to balance the yield of total procyanidins and catechin monomers (CA/EC/ECG). ## Supplementary Information The online version contains supplem

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Author

Jie Zhang; Dan Liu; Aoke Wang; Li Cheng; Wenya Wang; Yanhui Liu; Sadeeq Ullah; Qipeng Yuan

Publisher

Springer

Published

2021

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)