FOOD CHEMISTRY
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2019
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IF 5.399
Jiaxi Chu,Haizhen Zhao,Zhaoxin Lu,Fengxia Lu,Xiaomei Bie,Chong Zhang
Millet bran was fermented with Bacillus natto and the changes of structural, physicochemical and functional properties of its dietary fiber were investigated. Results showed that B. natto fermentation enhanced soluble DF content from 2.3% to 13.2%, and soluble DF/insoluble DF ratio from 3.1% to 19.9%. SEM and FTIR assay indicated that fermentation led to the degradation of cellulose and hemicellulose, thereby forming more porous and loose structure and polysaccharides. The binding capacities such as water and oil holding capacity, swelling capacity as well as cholesterol, bile salts, nitrite ion and glucose adsorption capacity were improved, while cation exchange capacity was not significantly changed. The total phenolic content and DPPH free radical scavenging capacity increased significantly. Overall, fermentation of millet bran by B. natto improved the structural and functional properties of its DF, which could be applied as a functional ingredient in food products.
研究领域:
食品科学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2024
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IF 3.3
Shimei Zhang,An Wang,Zhaoxin Lu,Fengxia Lu,Haizhen Zhao
Background Millet bran (MB), a byproduct of millet production, is rich in functional components, but has a low utilization rate. In recent years, researchers have shown that fermentation can improve the biological activities of cereals and their byproducts. This study used Bacillus natto to ferment millet bran to improve its added value and broaden the application areas of MB. The bioactive component content, physicochemical properties, and functional activities of millet bran extract (MBE) from fermented millet bran were determined. Results After fermentation, the contents of soluble dietary fiber (SDF), β-glucan, polypeptides, polyphenols, flavones, and total amino acids increased by 92.0%, 164.4%, 111.4%, 32.5%, 16.4%, and 95.4%, respectively. Scanning electron microscopy revealed that the microscopic morphology of MBE changed from complete and dense blocks to loosely porous shapes after fermentation. After fermentation, the solubility, water holding capacity, and viscosity significantly increased, and the particle size decreased. Moreover, the glucose adsorption capacity (2.1 mmol/g), glucose dialysis retardation index (75.3%), and α-glucosidase inhibitory (71.4%, mixed reversible inhibition) activity of the fermented MBE (FMBE) were greater than those of the unfermented MBE (0.99 mmol/g, 32.1%, and 35.1%, respectively). FMBE presented better cholesterol and sodium cholate (SC) adsorption properties, and the adsorption was considered inhomogeneous surface adsorption. Conclusion Fermentation increased the bioactive component content and improved the physicochemical properties of MBE, thereby improving its hypoglycemic and hypolipidemic properties. This study will not only resolve the problem of millet bran waste but also promote the development of a higher value-added application method for millet bran. This article is protected by copyright. All rights reserved.
研究领域:
食品科学
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生物技术
·
营养学
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生物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）