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Impacts of extraction methods on physicochemical characteristics and bioactivities of polysaccharides from rice bran

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Abstract

In this paper, hot water extraction (HWE), ultrasonic microwave cooperative extraction (UMAE) and alkali extraction (AE) were used to extract polysaccharides from rice bran (RBP) to investigate the impacts of different extraction methods on its physicochemical characteristics and bioactivities. Results indicated that the extraction yield of AE (10.40%) was significant higher than HWE (8.73%), but it had no obvious difference with UMAE (9.33%). Comparing with HWE and UMAE, RBP extracted by AE possessed more total polysaccharides and total phenolics, higher molecular weight and Xylose content, which might be contributed to its strong antioxidant activities and the inhibition on α-amylase and α-glucosidase. These findings revealed that AE might be a potential extraction method to obtain RBP with a high yield and good bioactivities. Furthermore, it would provide foundations for choosing the suitable extraction technology to prepare RBP with desired bioactivities and promoting the application of RBP in function food industries.

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Acknowledgements

This study was sponsored by the Shanghai Sailing Program (19YF1431800), National Natural Science Foundation of China (81900293).

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Correspondence to Yi-Ting Xue.

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Meng, JQ., Xu, PP., Gu, WT. et al. Impacts of extraction methods on physicochemical characteristics and bioactivities of polysaccharides from rice bran. Food Measure 16, 1137–1145 (2022). https://doi.org/10.1007/s11694-021-01245-6

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  • DOI: https://doi.org/10.1007/s11694-021-01245-6

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