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Original article
Application of the dual attribute time-intensity (DATI) sensory method to the temporal measurement of bitterness and astringency in sorghum
Article first published online: 1 DEC 2011
DOI: 10.1111/j.1365-2621.2011.02862.x
© 2011 The Authors. International Journal of Food Science and Technology © 2011 Institute of Food Science and Technology
Issue
International Journal of Food Science & Technology
Volume 47, Issue 3, pages 459–466, March 2012
Additional Information
How to Cite
Kobue-Lekalake, R. I., Taylor, J. R. N. and de Kock, H. L. (2012), Application of the dual attribute time-intensity (DATI) sensory method to the temporal measurement of bitterness and astringency in sorghum. International Journal of Food Science & Technology, 47: 459–466. doi: 10.1111/j.1365-2621.2011.02862.x
Publication History
- Issue published online: 15 FEB 2012
- Article first published online: 1 DEC 2011
- (Received 11 May 2011; Accepted in revised form 1 October 2011)
- Abstract
- Article
- References
- Cited By
Keywords:
- Astringency;
- bitterness;
- dual attribute time-intensity;
- sorghum;
- tannins
Summary
Bitterness and astringency are attributes generally cited as the cause of tannin sorghums being unpalatable. The objective here was to determine the effect of sorghums with varying tannin content on bitterness and astringency simultaneously using dual attribute time-intensity (DATI). A trained panel assessed bitterness and astringency of bran infusions of tannin and tannin-free sorghums. In both sorghum types, bitterness developed and reached maximum intensity faster (Tmax 22.5 s; P < 0.001) than astringency (27.9 s). The duration of the astringent sensation (Dtot 69.9 s) lasted longer than bitterness (66.3 s). Overall, the temporal parameters for bitterness distinguished infusions from tannin and tannin-free sorghums slightly more clearly than those for astringency. The research established that, for sorghum, bitterness and astringency are related. The DATI method also revealed that panellists’ perceptions of the time course of bitterness and astringency differ.