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KMID : 1011620170330020198
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Korean Journal of Food and Cookey Science
2017 Volume.33 No. 2 p.198 ~ p.208
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Effects of Hydrocolloids on the Quality of Protein and Transglutaminase Added Gluten-free Rice Bread
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Hwang Sun-Ok
Kim Ji-Myoung
Shin Mal-Shick
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Abstract
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Purpose: To improve the quality of basic gluten-free rice bread composed of white rice flour, salt, sugar, yeast, skim milk powder, olive oil, and water, the effects of transglutaminase (TGase), whey protein (WP), propylene glycol alginate (PGA), and hydroxypropylmethylcelluose (HPMC) were investigated.
Methods: TGase, WP, PGA, and HPMC were added to rice flour cumulatively. The pasting properties of rice flour blends as well as volume, shape, color value, textural properties and sensory evaluation of basic rice bread (RB1) RB1+TGase (RB2), RB1+TGase+WP (RB3), RB1+TGase+WP+PGA (RB4), and RB1+TGase+ WP+PGA+HPMC (RB5) were compared.
Results: Consistency of rice batter increased upon addition of TGase, WP and PGA, and RB3 and RB4 had higher specific volumes than others. PGA improved volume, crumb air cell uniformity, and resilience but lowered elasticity and moistness of RB. HPMC increased, hardness, moistness and softness, and slightly reduced volume.
Conclusion: Therefore, it is suggested that hydrocolloids, PGA and HPMC may be necessary to improve volume, crumb structure, textural properties and overall eating quality of gluten-free rice bread.
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KEYWORD
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gluten-free rice bread, non-waxy rice flour, propylene glycol alginate, hydroxypropylmethylcelluose, quality improvement
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