Premium
Mineral Binding Characteristics of Lignin, Guar Gum, Cellulose, Pectin and Neutral Detergent Fiber under Simulated Duodenal pH Conditions
Author(s) -
PLAlT STEPHEN R.,
CLYDESDALE FERGUS M.
Publication year - 1987
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1987.tb14096.x
Subject(s) - pectin , lignin , guar gum , cellulose , chemistry , guar , fiber , polysaccharide , nuclear chemistry , food science , biochemistry , organic chemistry
Effective stability constants (K cff ) and amount of Fe bound by lignin, cellulose, guar gum, low and high methoxy pectin and NDF were determined under simulated duodenal pH conditions. Guar gum bound 8.4 μmol Fe per g fiber with the greatest affinity (K cff = 6.27 × 10 6 ) of any of the fibers studied; NDF, high methoxy pectin, and one of the binding sites of lignin bound 5.0. 5.0, and 19.5 μmol Fe, respectively. per g fiber, with a K cff > 10 5 , and cellulose bound Fe so weakly that an effective stability constant could not be calculated. Lignin had two distinct binding sites for Fe, Zn, and Cu with the high affinity sites binding in the following order: Fe > Cu > Zn, but with twice as much Cu bound as either Fe or Zn.