Subcritical water treatment to modify insoluble dietary fibers from brewer's spent grain for improved functionality and gut fermentability.

IF 10.4 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Chemistry Pub Date : 2024-03-01 Epub Date: 2023-10-04 DOI:10.1016/j.foodchem.2023.137654

Xueqian Su, Qing Jin, Yixiang Xu, Hengjian Wang, Haibo Huang

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引用次数: 0

Abstract

Lactic acid (LA)-assisted subcritical water treatment (SWT) was applied to modify the insoluble dietary fiber (IDF) from brewer's spent grain (BSG) for enhancing its functionality and gut fermentability. Modified IDFs were thoroughly characterized for their chemical and structural properties. The results revealed that increasing the treatment temperature and LA concentration reduced hemicellulose content in IDFs from 38.4 % to 0.7 %, alongside a decreased yield (84.8 %-51.4 %), reduced particle size (519.8-288.6 μm), and more porous structure of IDFs. These modifications were linked to improved functionalities, evidenced by the highest water and oil holding capacity increasing by 36 % and 67 %, respectively. Remarkably, the highest glucose adsorption capacity increased by 6.5 folds. Notably, modified IDFs exhibited slower in-vitro fermentation, elevated short-chain fatty acids (SCFAs) production, and a higher proportion of butyrate in SCFAs. These findings highlight the potential of LA-assisted SWT in transforming BSG-derived IDF into a valuable functional food ingredient.

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亚临界水处理，对啤酒糟中的不溶性膳食纤维进行改性，以提高功能和肠道发酵能力。

采用乳酸（LA）辅助亚临界水处理（SWT）对啤酒糟中的不溶性膳食纤维（IDF）进行改性，以提高其功能和肠道发酵能力。对改性IDF的化学和结构性能进行了全面的表征。结果表明，提高处理温度和LA浓度可将IDFs中的半纤维素含量从38.4%降低到0.7%，同时产率降低（84.8%-51.4%），粒径减小（519.8-288.6μm），IDFs的多孔结构增强。这些改性与功能的改善有关，最高持水能力和含油能力分别提高了36%和67%。值得注意的是，最高葡萄糖吸附能力增加了6.5倍。值得注意的是，修饰的IDFs表现出较慢的体外发酵、较高的短链脂肪酸（SCFAs）产量以及较高比例的丁酸盐在SCFAs中。这些发现突出了LA辅助SWT将BSG衍生的IDF转化为有价值的功能性食品成分的潜力。

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.