Food Hydrocolloids
Food Hydrocolloids
5 years ago

Characterization of rheological properties of rye arabinoxylans in buckwheat model systems

Characterization of rheological properties of rye arabinoxylans in buckwheat model systems
The aim of this investigation was to study the rheological properties (gelation profile, mixing and pasting properties) of two rye arabinoxylans (AXs) (water-extracted (WEAXs), calcium hydroxide-extracted (CEAXs)) in buckwheat model systems using wholemeal and white flour. To promote gelation in these systems, pyranose 2-oxidase (POx) was added. AX characterization in solution showed a higher gelation profile for the CEAXs (G’: 0.48 Pa, G’’: 0.25 Pa) compared with the WEAXs (G’: 0.21 Pa, G’’: 0.14 Pa), probably due to differences in chemical and structural properties. In buckwheat batter systems, highest rheological properties were achieved when POx was added to the control flours (for wholemeal flour: G’: 40.1 kPa, G’’: 8.6 kPa; for white flour: G’: 18.7 kPa, G’’: 1.4 kPa), whereas most AX concentrations improved these properties to a lower degree. Nearly all wholemeal flour systems reached higher viscoelastic properties when containing CEAXs (G’: 20.0–35.1 kPa; G’’: 4.2–6.7 kPa), while WEAXs improved the majority of these properties in systems made with white flour (G’: 10.4–12.7 kPa; G’’: 2.2–2.3 kPa). No additional effect was seen in the batter viscoelasticity when POx was combined with these AXs. Pasting and mixing properties of the flour systems were mostly reduced by the addition of AXs, while the presence of POx displayed little or no further effect. These observations indicate that AXs could be applied as natural structure-forming agents in GF bread, when used in the right amount.

Publisher URL: www.sciencedirect.com/science

DOI: S0268005X17319653

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.