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Characterization of a water soluble, hyperbranched arabinogalactan from yacon (Smallanthus sonchifolius) roots
KTH, School of Biotechnology (BIO), Glycoscience.ORCID iD: 0000-0003-3572-7798
2017 (English)In: Food Chemistry, ISSN 0308-8146, E-ISSN 1873-7072, Vol. 223, p. 76-81Article in journal (Refereed) Published
Abstract [en]

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).

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 223, p. 76-81
Keywords [en]
AF4, Arabinogalactan, Asymmetric flow field-flow fractionation, Smallanthus sonchifolius, Yacon
National Category
Other Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-202026DOI: 10.1016/j.foodchem.2016.12.019ISI: 000392778700011PubMedID: 28069126Scopus ID: 2-s2.0-85006705583OAI: oai:DiVA.org:kth-202026DiVA, id: diva2:1076510
Funder
Sida - Swedish International Development Cooperation Agency
Note

QC 20170223

Available from: 2017-02-23 Created: 2017-02-23 Last updated: 2017-11-29Bibliographically approved

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