Polysaccharides from the pulp of cupuassu (Theobroma grandiflorum): Structural characterization of a pectic fraction

被引：88

作者：

Vriesmann, Lucia Cristina ^{[1
]}

de Oliveira Petkowicz, Carmen Lucia ^{[1
]}

机构：

[1] Univ Fed Parana, Dept Bioquim & Biol Mol, BR-81531990 Curitiba, Parana, Brazil

来源：

CARBOHYDRATE POLYMERS | 2009年 / 77卷 / 01期

关键词：

Cupuassu; Theobroma grandiflorum; Polysaccharides; Pectin; Starch; PHYSICOCHEMICAL CHARACTERIZATION; EXTRACTION CONDITIONS; HAIRY REGIONS; ESTERIFICATION; PURIFICATION; POPULATIONS; PEACHES; FRUITS;

D O I：

10.1016/j.carbpol.2008.12.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Cupuassu (Theobroma grandiflorum, Schumann) is a Brazilian Amazonian fruit whose pulp contains volatile compounds that have been extensively studied. In this work, the pulp from fruits of cupuassu was ground, treated with MeOH-H2O, and defatted with p-Tol-EtOH. The residue (4% in relation to the fresh pulp) was submitted to sequential extractions with water, aqueous citric acid and aqueous NaOH, resulting in polysaccharide fractions with 0.3-15% yield. The main pectic fraction (7% yield) was obtained with water at 25 degrees C (W-1 fraction) and was chosen to be better characterized. Chemical and spectroscopic analyses showed that W-1 is composed mainly of a homogalacturonan highly esterified (DE 53%; DA 1.7%) with some rhamnogalacturonan insertions, carrying side chains containing galactose and arabinose. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：72 / 79

页数：8

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