Steam flash explosion pretreatment enhances soybean seed coat phenolic profiles and antioxidant activity

•Soybean seed coat is the primary byproduct during the production of soybean.•Steam flash explosion pretreatment was firstly performed for soybean seed coat.•Steam flash explosion process parameters were systematically optimized.•Cellular structure of treated soybean seed coats was fluffy.•Both rele...

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Bibliographic Details
Published in:Food chemistry 2020-07, Vol.319, p.126552-126552, Article 126552
Main Authors: Chen, Yongsheng, Shan, Sharui, Cao, Dongmin, Tang, Dan
Format: Article
Language:English
Subjects:
Antioxidant activity
Antioxidants - analysis
Antioxidants - chemistry
Chromatography, High Pressure Liquid
Explosions
Food Handling
Glycine max - chemistry
HPLC-DAD-Q-Orbitrap HRMS/MS
Isoflavones - analysis
Phenols - analysis
Phenols - chemistry
Phytochemicals
Seeds - chemistry
Soybean coat
Steam
Steam flash explosion
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Summary:•Soybean seed coat is the primary byproduct during the production of soybean.•Steam flash explosion pretreatment was firstly performed for soybean seed coat.•Steam flash explosion process parameters were systematically optimized.•Cellular structure of treated soybean seed coats was fluffy.•Both release of phenolics and antioxidant activity were enhanced. The resource utilization of soybean seed coats is currently poor. In this study, steam flash explosion (SFE) pretreatment was performed to extract valuable phytochemicals from soybean seed coats. The total content of phytochemicals and the antioxidant activity of extracts from SFE-treated soybean seed coat were systematically evaluated. On the basis of the application value of antioxidant activity, we optimized the process parameters of SFE-pretreated soybean seed coat to maximize the antioxidant activity. Additionally, the subsequently obtained ethyl acetate fraction with the highest antioxidant activity was analysed using HPLC-DAD-Q-Orbitrap HRMS/MS analysis. The results indicated that SFE could enhance the release of both aglycone and acetylglucoside forms of isoflavones from the cellular structure and enhance the antioxidant activity of soybean seed coats. This study provides evidence that SFE is a novel thermal processing technology with high efficiency and low energy consumption that improves the phytochemical composition and bioactivity of soybean seed coats.
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2020.126552