Extraction and characterization of soy hull polysaccharide-protein fractions. Analysis of aggregation and surface rheology

Extraction and characterization of soy hull polysaccharide-protein fractions. Analysis of... Soy hull soluble fractions (HSF) were obtained by acid or alkaline/acid extraction. By chemical characterization and Fourier Transform Infrared Spectroscopy we demonstrated that galactomannanproteins and arabinogalactanproteins are solubilized in alkaline or acid medium, while high methoxyl pectic polysaccharides are solubilized in hot acid medium. In this work functional properties of HSF were studied, both in solution and in air-water interfaces. Z-potential versus pH showed that the presence of higher polysaccharide/protein ratios decreases the isoelectric point of soy hull proteins. Turbidimetry and particle size showed that soy hull proteins aggregate at acidic pHs (around the isoelectric point), but this tendency is diminished as the amount of polysaccharide increases. Besides, HSF accumulate at the air-water interface and generate viscoelastic films. Higher viscoelastic parameters are obtained around the isoelectric points, and higher polysaccharide ratios provides higher elasticity at more acidic pHs. We propose that this will improve the protection of the air-water surface at extreme pHs provided by HSF. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Food Hydrocolloids Elsevier

Extraction and characterization of soy hull polysaccharide-protein fractions. Analysis of aggregation and surface rheology

Loading next page...
 
/lp/elsevier/extraction-and-characterization-of-soy-hull-polysaccharide-protein-ZfCh37xZIl
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0268-005X
eISSN
1873-7137
D.O.I.
10.1016/j.foodhyd.2017.11.050
Publisher site
See Article on Publisher Site

Abstract

Soy hull soluble fractions (HSF) were obtained by acid or alkaline/acid extraction. By chemical characterization and Fourier Transform Infrared Spectroscopy we demonstrated that galactomannanproteins and arabinogalactanproteins are solubilized in alkaline or acid medium, while high methoxyl pectic polysaccharides are solubilized in hot acid medium. In this work functional properties of HSF were studied, both in solution and in air-water interfaces. Z-potential versus pH showed that the presence of higher polysaccharide/protein ratios decreases the isoelectric point of soy hull proteins. Turbidimetry and particle size showed that soy hull proteins aggregate at acidic pHs (around the isoelectric point), but this tendency is diminished as the amount of polysaccharide increases. Besides, HSF accumulate at the air-water interface and generate viscoelastic films. Higher viscoelastic parameters are obtained around the isoelectric points, and higher polysaccharide ratios provides higher elasticity at more acidic pHs. We propose that this will improve the protection of the air-water surface at extreme pHs provided by HSF.

Journal

Food HydrocolloidsElsevier

Published: Jun 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial