期刊
CARBOHYDRATE POLYMERS
卷 93, 期 2, 页码 589-596出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.12.057
关键词
Pressed potato fibre; Cell wall polysaccharides; Extraction; Water holding capacity
资金
- European Union
- European Regional Development Fund
- Ministry of Economic Affairs, Agriculture and Innovation
- municipality of Groningen
- province of Groningen
- Dutch Carbohydrate Competence Centre (CCC WP8)
- Wageningen University
- Avebe
- Royal Cosun
- Duynie B.V.
- Peaks in the Delta
Pressed potato fibre (PPF) has a high water holding capacity (WHC) affecting its processing as an animal feed. The aim of this study was to characterize cell wall polysaccharides (CWPs) in PPF and investigate their WHC. This was done via sequential extractions. Half of all CWPs were recovered in the hot buffer soluble solids extract as pectins (uronic acid and rhamnose) and galactans wherein most pectins (76%) from PPF were water soluble. Most likely, the network of CWPs is loosened during processing of potatoes. PPF showed a WHC of 7.4 expressed as the amount of water held per g of dry matter (mL/g). Reconstituting hot buffer soluble solids with buffer insoluble solids in water gave a WHC comparable to that of PPF. Removal of alkali soluble solids, which mainly comprised xyloglucans, lowered the WHC of the final residue. The results indicated that interactions between CWPs could affect the WHC of PPF. (c) 2013 Elsevier Ltd. All rights reserved.
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