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Title: Comparison study of the effect of green tea extract (GTE) on the quality of bread by instrumental analysis and sensory evaluation
Authors: Wang, R.
Zhou, W. 
Isabelle, M.
Keywords: Bread
Green tea extract
Sensory quality
Texture profile analysis
Issue Date: May-2007
Citation: Wang, R., Zhou, W., Isabelle, M. (2007-05). Comparison study of the effect of green tea extract (GTE) on the quality of bread by instrumental analysis and sensory evaluation. Food Research International 40 (4) : 470-479. ScholarBank@NUS Repository.
Abstract: Sensory evaluation techniques and instrumental analyses were used to investigate the changes in crumb appearance, texture properties and taste profile of bread containing tea antioxidants. Bread incorporating green tea extract (GTE) at the levels of 1.5 and 5.0 g/kg flour was analyzed concurrently with the control in a random order by panelists. Sensory analysis was carried out through a descriptive profiling test by both un-trained panelists and trained panelists. A total of six sensory attributes including brightness, porosity, hardness, stickiness, sweetness and astringency were evaluated. Instrumental analyses included image analysis for porosity, spectrophotometric measurement for brightness, and texture profile analysis for hardness and stickiness. Results showed that the sensory evaluation was generally correlated well with the instrumental analysis. With an increase in the level of GTE, the brightness and sweetness of the bread with GTE decreased, whereas the hardness, stickiness and astringency increased. No significant difference in the histogram of cell diameter (porosity) was found. The threshold level of GTE was at 5.0 g/kg flour for astringency and sweetness, and 1.5 g/kg flour for brightness, hardness and stickiness. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Food Research International
ISSN: 09639969
DOI: 10.1016/j.foodres.2006.07.007
Appears in Collections:Staff Publications

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