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Author Taboada, E.; Fisher, P.; Jara, R.; Zuniga, E.; Gidekel, M.; Cabrera, J.C.; Pereira, E.; Gutierrez-Moraga, A.; Villalonga, R.; Cabrera, G.
Title Isolation and characterisation of pectic substances from murta (Ugni molinae Turcz) fruits Type
Year 2010 Publication Food Chemistry Abbreviated Journal Food Chem.
Volume 123 Issue 3 Pages 669-678
Keywords Pectin; Murta; Ugni molinae; Polysaccharide extraction; Pectin characterisation
Abstract Cell walls polysaccharides from murta fruit (Ugni molinae Turcz), an endemic Chilean species with relevant food uses, were fractionated by water, ammonium oxalate, hot diluted HCl and cold diluted NaOH extractions. The polysaccharide fractions were analysed for monosaccharide composition and physicochemical properties. Pectic substances were found in all extracts, but mainly in the oxalate and acid soluble fractions, in which they appear as homogalacturonan polymers. Murta pectin was further extracted by hot diluted acid treatment using industrial conditions, yielding 30% by weight of dry fruit. The polymer showed similar composition and physicochemical properties to those of commercial citrus pectin, presenting a galacturonic acid content of 70.9% (w/w), a molecular weight of 597 kDa, and a methoxylation degree of 57%. The FT-IR spectrum of murta pectin suggests the presence of ferulic acid residues on its structure and the NMR analysis confirmed the structure of this polysaccharide. It is concluded that murta fruit can be considered as a valuable source of high quality pectin. (C) 2010 Elsevier Ltd. All rights reserved.
Address [Gidekel, Manuel; Cabrera, Gustavo] Univ Adolfo Ibanez, VentureLab, Escuela Negocios, Santiago, Chile, Email: gustavo.cabrera@uai.cl
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0308-8146 ISBN Medium
Area Expedition Conference
Notes (up) WOS:000280917800016 Approved
Call Number UAI @ eduardo.moreno @ Serial 80
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