title: Improved starch recovery from potatoes by enzymes and reduced water holding of the residual fibres.
abstract: During the industrial extraction of starch from potatoes (Seresta), some starch remains within undisrupted potato cells in the fibrous side-stream. The aim of this study was to investigate if enzymatic degradation of cell wall polysaccharides (CWPs) can enhance starch recovery and lower the water holding capacity (WHC) of the "fibre" fraction. The use of a pectinase-rich preparation recovered 58% of the starch present in the "fibre" fraction. Also, the "fibre" fraction retained only 40% of the water present in the non-enzyme treated "fibre". This was caused by the degradation of pectins, in particular arabinogalactan side chains calculated as the sum of galactosyl and arabinosyl residues.
authors.affiliation: Laboratory of Food Chemistry, Wageningen University and Research Centre, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
authors.forename: Urmila R
authors.initials: UR
authors.lastname: Ramasamy
authors.affiliation: Food and Biobased Research, Wageningen University and Research Centre, The Netherlands.
authors.forename: Steef
authors.initials: S
authors.lastname: Lips
authors.affiliation: Food and Biobased Research, Wageningen University and Research Centre, The Netherlands.
authors.forename: Rob
authors.initials: R
authors.lastname: Bakker
authors.affiliation: Laboratory of Food Chemistry, Wageningen University and Research Centre, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
authors.forename: Harry
authors.initials: H
authors.lastname: Gruppen
authors.affiliation: Laboratory of Food Chemistry, Wageningen University and Research Centre, P.O. Box 17, 6700 AA Wageningen, The Netherlands. Electronic address: Mirjam.Kabel@wur.nl.
authors.forename: Mirjam A
authors.initials: MA
authors.lastname: Kabel
mesh_terms: D004043:Dietary Fiber / Q000378:metabolism*; D011198:Solanum tuberosum / Q000737:chemistry / Q000201:enzymology*; D013213:Starch / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism*; D014867:Water / Q000737:chemistry / Q000378:metabolism*; D001616:beta-Galactosidase / Q000378:metabolism; D001617:beta-Glucosidase / Q000378:metabolism
chemical_list: D004043:Dietary Fiber; D014867:Water; D013213:Starch; D001617:beta-Glucosidase; D001616:beta-Galactosidase
keywords: Enzymes; Galactan; Potato; Starch; Water holding capacity