Structural Characterization and Antioxidant Activity of Exopolysaccharide from Soybean Whey Fermented by <i>Lacticaseibacillus plantarum</i> 70810
Soybean whey is a high-yield but low-utilization agricultural by-product in China. In this study, soybean whey was used as a substrate of fermentation by <i>Lacticaseibacillus plantarum</i> 70810 strains. An exopolysaccharide (LPEPS-1) was isolated from soybean whey fermentation by <i...
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| Autores principales: | , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/07fe76d9fd88403cb4354e67ec12a968 |
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| Sumario: | Soybean whey is a high-yield but low-utilization agricultural by-product in China. In this study, soybean whey was used as a substrate of fermentation by <i>Lacticaseibacillus plantarum</i> 70810 strains. An exopolysaccharide (LPEPS-1) was isolated from soybean whey fermentation by <i>L. plantarum</i> 70810 and purified by ion-exchange chromatography. Its preliminary structural characteristics and antioxidant activity were investigated. Results show that LPEPS-1 was composed of mannose, glucose, and galactose with molar ratios of 1.49:1.67:1.00. The chemical structure of LPEPS-1 consisted of →4)-α-D-Glc<i>p</i>-(1→, →3)-α-D-Gal<i>p</i>-(1→ and →2)-α-D-Man<i>p</i>-(1→. Scanning electron microscopy (SEM) revealed that LPEPS-1 had a relatively rough surface. In addition, LPPES-1 exhibited strong scavenging activity against DPPH and superoxide radicals and chelating ability on ferrous ion. This study demonstrated that soybean whey was a feasible fermentation substrate for the production of polysaccharide from <i>L. plantarum</i> 70810 and that the polysaccharide could be used as a promising ingredient for health-beneficial functional foods. |
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