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Characterization of a water soluble, hyperbranched arabinogalactan from yacon (Smallanthus sonchifolius) roots

Castro, Alejandra LU ; Vilaplana, Francisco and Nilsson, Lars LU (2017) In Food Chemistry 223. p.76-81
Abstract

Yacon (Smallanthus sonchifolius Poepp. & Endl.) roots are largely grown in Andean countries and have attracted recent interest due to their antioxidant and prebiotic effects. Yacon is typically consumed as a fruit due to its sweet taste and juiciness. The macromolecular properties of an aqueous extract of yacon are investigated using asymmetric flow field-flow fractionation (AF4) coupled to UV, multiangle light scattering (MALS) and differential refractive index (dRI) detection. The method allows for determination of molar mass and size over the size distribution. Three major populations were found of which one strongly dominates in concentration. Through collection of fractions from AF4, carbohydrate composition and glycosidic... (More)

Yacon (Smallanthus sonchifolius Poepp. & Endl.) roots are largely grown in Andean countries and have attracted recent interest due to their antioxidant and prebiotic effects. Yacon is typically consumed as a fruit due to its sweet taste and juiciness. The macromolecular properties of an aqueous extract of yacon are investigated using asymmetric flow field-flow fractionation (AF4) coupled to UV, multiangle light scattering (MALS) and differential refractive index (dRI) detection. The method allows for determination of molar mass and size over the size distribution. Three major populations were found of which one strongly dominates in concentration. Through collection of fractions from AF4, carbohydrate composition and glycosidic linkage analysis for the dominating population was performed. The results show that the dominating population consists of a highly branched arabinogalactan (type 2) with a molar mass of approximately 1–2 · 105 g/mol, a hydrodynamic radius of approximately 6–10 nm and a relatively high apparent density (approx. 70–150 kg/m3).

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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
AF4, Arabinogalactan, Asymmetric flow field-flow fractionation, Smallanthus sonchifolius, Yacon
in
Food Chemistry
volume
223
pages
6 pages
publisher
Elsevier
external identifiers
  • scopus:85006705583
  • wos:000392778700011
ISSN
0308-8146
DOI
10.1016/j.foodchem.2016.12.019
language
English
LU publication?
yes
id
5b3d45a1-2bfa-4728-8235-d9150f2aaaa3
date added to LUP
2017-01-23 10:00:25
date last changed
2018-01-14 04:29:14
@article{5b3d45a1-2bfa-4728-8235-d9150f2aaaa3,
  abstract     = {<p>Yacon (Smallanthus sonchifolius Poepp. &amp; Endl.) roots are largely grown in Andean countries and have attracted recent interest due to their antioxidant and prebiotic effects. Yacon is typically consumed as a fruit due to its sweet taste and juiciness. The macromolecular properties of an aqueous extract of yacon are investigated using asymmetric flow field-flow fractionation (AF4) coupled to UV, multiangle light scattering (MALS) and differential refractive index (dRI) detection. The method allows for determination of molar mass and size over the size distribution. Three major populations were found of which one strongly dominates in concentration. Through collection of fractions from AF4, carbohydrate composition and glycosidic linkage analysis for the dominating population was performed. The results show that the dominating population consists of a highly branched arabinogalactan (type 2) with a molar mass of approximately 1–2 · 10<sup>5</sup> g/mol, a hydrodynamic radius of approximately 6–10 nm and a relatively high apparent density (approx. 70–150 kg/m<sup>3</sup>).</p>},
  author       = {Castro, Alejandra and Vilaplana, Francisco and Nilsson, Lars},
  issn         = {0308-8146},
  keyword      = {AF4,Arabinogalactan,Asymmetric flow field-flow fractionation,Smallanthus sonchifolius,Yacon},
  language     = {eng},
  month        = {05},
  pages        = {76--81},
  publisher    = {Elsevier},
  series       = {Food Chemistry},
  title        = {Characterization of a water soluble, hyperbranched arabinogalactan from yacon (Smallanthus sonchifolius) roots},
  url          = {http://dx.doi.org/10.1016/j.foodchem.2016.12.019},
  volume       = {223},
  year         = {2017},
}