The effect of subcritical water treatment on the physicochemical properties and α‐glucosidase inhibitory activity of Sargassum fusiforme polysaccharides

Summary In order to make full use of Sargassum fusiforme (S. fusiforme), subcritical water treatment, an environmentally friendly method, was used to degrade polysaccharides to enhance their functional activity. Results revealed that average molecular weight decreased with increasing subcritical wat...

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Bibliographic Details
Published in:International journal of food science & technology 2023-07, Vol.58 (7), p.3958-3968
Main Authors: Zhang, Mengqing, Zhang, Zhenna, Guo, Lichun, Zhao, Wei
Format: Article
Language:English
Subjects:
Acarbose
Degradation
Degradation model
Depolymerization
Functional groups
Glucosidase
Low molecular weights
Molecular weight
Monosaccharides
Physicochemical properties
Polysaccharides
Rheological properties
Saccharides
Sargassum fusiforme
Sargassum fusiforme polysaccharides
Structural analysis
subcritical water treatment
Viscoelasticity
Water treatment
α‐Glucosidase inhibitors
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Summary:Summary In order to make full use of Sargassum fusiforme (S. fusiforme), subcritical water treatment, an environmentally friendly method, was used to degrade polysaccharides to enhance their functional activity. Results revealed that average molecular weight decreased with increasing subcritical water treatment time or temperature. The depolymerisation kinetic was found to follow a first‐order kinetics model fitted to 1/Mt – 1/M0 = k • t. Structural characterisation exhibited that subcritical water treatment changed the molar ratio composition of monosaccharides, while the main functional groups of S. fusiforme polysaccharides did not change significantly. Rheological characterisation demonstrated that the three degraded polysaccharides displayed shear‐thinning behaviour and viscoelasticity. Except for natural polysaccharides, the α‐glucosidase inhibitory activity of the three degraded polysaccharides was superior to that of acarbose. Consequently, this study can provide scientific evidence for subcritical water treatment as a green and efficient method to prepare bioactive polysaccharides with low molecular weight. Depolymerization of Sargassum fusiforme polysaccharides in subcritical water.
ISSN:0950-5423
1365-2621
DOI:10.1111/ijfs.15981