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Binding of polyphenols to plant cell wall analogues - Part 2: Phenolic acids

Padayachee, A. and Netzel, G. and Netzel, M. and Day, L. and Zabaras, D. and Mikkelsen, D. and Gidley, M. J. (2012) Binding of polyphenols to plant cell wall analogues - Part 2: Phenolic acids. Food Chemistry, 135 (4). pp. 2287-2292. ISSN 0308-8146

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Article Link(s): http://dx.doi.org/10.1016/j.foodchem.2012.07.004

Abstract

Bacterial cellulose and cellulose-pectin composites were used as well-defined model plant cell wall (PCW) systems to study the interaction between phenolic acids (PA) derived from purple carrot juice concentrate (PCJC) and PCW components. Significant PA depletion from solution occurred, with pure cellulose initially (30 s-1 h) absorbing more than cellulose-pectin composites in the first hour (ca 20% cf 10-15%), but with all composites absorbing similar levels (ca 30%) after several days. Individual PAs bound to different relative extents with caffeic acid > chlorogenic acid > ferulic acid. Extrapolation of data for these model systems to carrot puree suggests that nutritionally-significant amounts of PAs could bind to cell walls, potentially restricting bioavailability in the small intestine and, as a consequence, delivering PAs to the large intestine for fermentation and metabolism by gut bacteria. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type:Article
Business groups:Biosecurity Queensland
Subjects:Science > Botany > Plant physiology
Deposited On:28 Oct 2013 03:58
Last Modified:28 Oct 2013 03:58

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