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

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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 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).

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Universidad Mayor de San Simon
  • KTH Royal Institute of Technology
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Livsmedelsvetenskap
  • Organisk kemi

Nyckelord

Originalspråkengelska
Sidor (från-till)76-81
Antal sidor6
TidskriftFood Chemistry
Volym223
StatusPublished - 2017 maj 15
PublikationskategoriForskning
Peer review utfördJa