Extraction solvents influence physicochemical, structural, and functional properties of polysaccharides isolated from okra seeds: a comparative study


Citation

Zhang, G. and Wei, X. and Song, X. and Yan, Y. and Guo, M. and Xu, K. (2024) Extraction solvents influence physicochemical, structural, and functional properties of polysaccharides isolated from okra seeds: a comparative study. International Food Research Journal (Malaysia), 31. pp. 1216-1225. ISSN 2231 7546

Abstract

The present work investigated the physicochemical and functional properties of okra seed polysaccharides extracted by three different solvents, including molecular structure, antioxidant activities, pancreatic lipase, and α-amylase inhibitory activities. Extraction solvents showed remarkable influence on the extraction yield, structural composition, and functional properties of okra seed polysaccharides. Okra seed polysaccharides extracted by hot water, citric acid, and alkali were named as WOSP, COSP and AOSP, respectively. Results showed that arabinose (23.08 - 33.91%) was the main monosaccharide among three kinds of okra seed polysaccharides. The molecular weight of COSP (706.7 kDa) was much higher than that of AOSP (397.6 kDa). COSP had stronger pancreatic lipase and αamylase inhibitory activities, but weaker antioxidant activities than AOSP. WOSP exhibited higher emulsifying activity (58.77%) and emulsion stability (57.77%) than COSP and AOSP. Thermal treatment significantly improved the emulsifying capacity among three kinds of okra seed polysaccharides, especially the creaming index which increased 190% in the case of COSP stored for 30 d. These results suggested that appropriate solvent could play crucial role in the structure of okra seed polysaccharides and their food potential application.


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Abstract

The present work investigated the physicochemical and functional properties of okra seed polysaccharides extracted by three different solvents, including molecular structure, antioxidant activities, pancreatic lipase, and α-amylase inhibitory activities. Extraction solvents showed remarkable influence on the extraction yield, structural composition, and functional properties of okra seed polysaccharides. Okra seed polysaccharides extracted by hot water, citric acid, and alkali were named as WOSP, COSP and AOSP, respectively. Results showed that arabinose (23.08 - 33.91%) was the main monosaccharide among three kinds of okra seed polysaccharides. The molecular weight of COSP (706.7 kDa) was much higher than that of AOSP (397.6 kDa). COSP had stronger pancreatic lipase and αamylase inhibitory activities, but weaker antioxidant activities than AOSP. WOSP exhibited higher emulsifying activity (58.77%) and emulsion stability (57.77%) than COSP and AOSP. Thermal treatment significantly improved the emulsifying capacity among three kinds of okra seed polysaccharides, especially the creaming index which increased 190% in the case of COSP stored for 30 d. These results suggested that appropriate solvent could play crucial role in the structure of okra seed polysaccharides and their food potential application.

Additional Metadata

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Item Type: Article
AGROVOC Term: polysaccharides
AGROVOC Term: monosaccharides
AGROVOC Term: extraction
AGROVOC Term: characterization
AGROVOC Term: solvents
AGROVOC Term: hot water treatment
AGROVOC Term: citric acid
AGROVOC Term: alkalinity
AGROVOC Term: functional properties
AGROVOC Term: molecular weight
Geographical Term: China
Depositing User: Nor Hasnita Abdul Samat
Date Deposited: 05 May 2026 07:41
Last Modified: 05 May 2026 07:41
URI: http://webagris.upm.edu.my/id/eprint/3335

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