Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 101, Issue -, Pages 1004-1011Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2017.03.156
Keywords
Soluble dietary fibre from potato pulp; Enzyme-assisted extraction; Physicochemical and functional properties
Funding
- Key Program of the National Natural Science Foundation of China [31230057]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Program of Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province
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In this study, enzyme-assisted methodology was applied with the aim to optimise the efficiency of soluble dietary fibre (SDF) extraction from potato pulp. The yields of SDF pretreated by cellulase, xylanase, and a cellulase/xylanase mixture were 31.9% (w/w), 25.7% (w/w), and 39.7% (w/w) respectively. When comparing single enzyme pretreatment with combined enzymatic treatment, we observed differences in properties related to molecular weight and viscosity. SDF obtained by xylanase pretreatment rendered better results for glucose dialysis retardation index (32.98%, w/w), amylase inhibitory effect (56.2%), and pancreatic lipase inhibitory activity (55.33%), while combined enzymatic pretreatment exhibited better effect in properties related to exposure of functional groups and specific surface area, including sodium cholate binding capacity (72.2%) and hydroxyl radical scavenging activity (87.57%). Our results indicated that enzymatic pretreatment, which could effectively hydrolyse cellulose and hemicellulose components, could not only benefit the yield of SDF, but also enhance its physiological and functional properties. (C) 2017 Elsevier B.V. All rights reserved.
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