Preparation and characterisation of dietary fibre from sugar beet pulp |
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Authors: | Florence Michel Jean-Franois Thibault Jean-Luc Barry Rgis de Baynast |
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Affiliation: | Florence Michel,Jean-François Thibault,Jean-Luc Barry,Régis de Baynast |
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Abstract: | Dried sugar beet pulp was ground and washed with 95% ethanol in order to obtain a colourless and odourless product which could be used as dietary fibre after drying and sieving. Sugar beet fibre had the same chemical composition as the initial pulp: 26–32% of hemicelluloses, 22–24% cellulose, 21.5–23% uronic acids, ~1–2% lignin, ~7–8% protein, 7.5–12% ash and ~0.5% residual sucrose. The main physicochemical properties such as density, cation exchange capacity (~0.6 meq g?1) and water holding capacity (24–32 g g?1) were determined. The water holding capacity of sugar beet fibre was only slightly affected by pH and ionic strength (adjusted by NaCl or CaCl2) but it held less water in the H+ form than in the salt form, Na+ or Ca2+. |
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Keywords: | Sugar beet fibre cellulose hemicellulose pectins composition water holding capacity swelling cation exchange capacity |
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