Journal
FOOD CHEMISTRY
Volume 215, Issue -, Pages 333-340Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.07.137
Keywords
Neutral monosaccharides; Acidic monosaccharides; Xylose; Emulsion activity index; Zeta potential
Funding
- Australian Federal Government
- Australian Government's Collaborative Research Network
- ARC Linkage project [LP140100722]
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Flaxseed gum (FG) was extracted at four different temperatures (30, 50, 70 and 90 degrees C). Chemical composition and structural features of FG extracted at different temperatures were investigated to determine the effect of temperature. Content of acidic monosaccharides and denatured protein increased with increasing FG extraction temperature. The ratio of neutral to acidic monosaccharides decreased from 6.7 to 5.7 as the extraction temperature was increased from 30 to 90 degrees C. Physiochemical and functional properties, including zeta-potential, surface morphology, emulsifying activity index (EAI) and emulsion stability index (ESI), water absorption capacity (WAC) and fat absorption capacity (FAC) of FG samples, were also investigated as a function of extraction temperature. EAI and WAC of FG samples reduced significantly with rise in extraction temperature. Our study suggests that FG extracted at different temperatures may be specifically targeted for different applications, such as for emulsification or gel formation in food systems. (C) 2016 Elsevier Ltd. All rights reserved.
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