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Flaxseed Gum Solution Functional Properties.

Yingxue Hu1, Youn Young Shim2,3,4,5, Martin J T Reaney2,3,4

  • 1Department of Food and Bioproduct Sciences, University of Saskatchewan, Saskatoon, SK S7N 5A8, Canada.

Foods (Basel, Switzerland)
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Summary

Higher extraction temperatures improve flaxseed gum (FG) functionality. Flaxseed gum (FG) extracted at 98°C shows enhanced stability, viscosity, and emulsification properties, increasing its commercial value as a food additive.

Keywords:
Linum usitatissimum L., flaxseedemulsificationfoamabilityfreeze-thawgum

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Area of Science:

  • Food Science and Technology
  • Biopolymer Chemistry

Background:

  • Flaxseed gum (FG), a byproduct of flaxseed processing, possesses valuable food additive properties like thickening, emulsification, and foaming.
  • The complex polymer structure of FG contains bioactive compounds, making extraction conditions critical for its functional characteristics and stability.
  • Extraction temperature significantly influences FG's quality, commercial value, and performance in food applications.

Purpose of the Study:

  • To investigate the impact of extraction temperature (70°C vs. 98°C) on the functional properties and storage stability of flaxseed gum (FG) solutions.
  • To evaluate how FG extraction temperature affects its viscosity, foaming, emulsification capabilities, and overall commercial potential.

Main Methods:

  • Flaxseed gum (FG) solutions were prepared using hot-water extraction at two different temperatures: 70°C and 98°C.
  • Key functional properties including viscosity, foamability, and emulsification capacity were measured for each FG solution.
  • Storage stability of the FG solutions was assessed, along with their tolerance to salt addition and freeze-thaw cycles.

Main Results:

  • FG solutions extracted at 98°C exhibited lower initial viscosity but demonstrated superior viscosity stability during storage compared to those extracted at 70°C.
  • Higher extraction temperature (98°C) resulted in enhanced foaming and emulsification properties, with improved stability over time.
  • Both extraction temperatures yielded FG solutions with comparable tolerance to 0.1 mol/L salt and freeze-thaw cycles.

Conclusions:

  • Extracting flaxseed gum (FG) at a higher temperature (98°C) yields a product with more stable functional properties, including viscosity, foamability, and emulsification.
  • The improved stability and performance characteristics of FG extracted at 98°C suggest a higher commercial value for its use as a food additive.
  • Optimizing extraction temperature is crucial for maximizing the quality and utility of flaxseed gum in food product development.