African Journal of Food Science
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Article Number - 07D562055977


Vol.12(3), pp. 28-37 , March 2018
https://doi.org/10.5897/AJFS2017.1644
ISSN: 1996-0794


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Full Length Research Paper

Effect of traditional and modified grain-soaking methods on physicochemical characteristics and consumers’ acceptability of sorghum ogi



Bolade K. Mathew
  • Bolade K. Mathew
  • Cereal, Root and Tuber Processing Unit, Department of Food Science and Technology, Federal University of Technology, P.M.B. 704, Akure, Ondo State, Nigeria.
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Anota O. Adebowale
  • Anota O. Adebowale
  • Cereal, Root and Tuber Processing Unit, Department of Food Science and Technology, Federal University of Technology, P.M.B. 704, Akure, Ondo State, Nigeria.
  • Google Scholar
Bolade O. Oladayo
  • Bolade O. Oladayo
  • Nursing and Public Health Unit, University Health Centre, Federal University of Technology, P.M.B. 704, Akure, Ondo State, Nigeria.
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 Received: 04 August 2017  Accepted: 11 January 2018  Published: 31 March 2018

Copyright © 2018 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


The influence of traditional and modified soaking methods and varietal difference of sorghum [Sorghum bicolor (Linn.) Moench] grains on the physicochemical properties and consumers’ acceptability of ogi was investigated. Three sorghum varieties (SAMSORG-14, SAMSORG-41 and SAMSORG-42) were used for the study, and each was subjected to three grain-soaking methods (SGW-72, PBW-24 and IBG5-24) after which ogi was produced and then oven-dried (55°C for 18 h). The pH of sorghum ogi prepared from IBG5-24 method was statistically higher (p<0.05) than those from others while it exhibited a correspondingly lowest total titratable acidity. The water absorption capacity (252 to 293%) of ogi also varied with respect to the grain varieties and soaking methods applied. The pasting properties of ogi samples gave significantly varied values (p<0.05) with respect to grain varieties and soaking methods, and these include peak viscosity (560 to 1311 cP), breakdown viscosity (117 to 317 cP), final viscosity (801 to 1571 cP) and setback viscosity (358 to 577 cP). The lightness index (L*-value) of ogi from IBG5-24 method was statistically lower (p<0.05) than that of others while both the swelling capacity and solubility index of ogi samples exhibited increasing values with the elevation of temperature of heating. The sensory quality rating of sorghum gruel (re-constituted and boiled ogi) revealed that ogi from ‘SAMSORG-42 (PBW-24)’ was rated the highest in terms of colour, taste, consistency, aroma and overall acceptability though not significantly different (p<0.05) from samples of ‘SAMSORG-14 (PBW-24)’ and ‘SAMSORG-41 (PBW-24)’. Grain-soaking methods and varietal difference have therefore been shown to influence the physicochemical characteristics and consumers’ preference of sorghum ogi.

Key words:  Sorghum, ogi, drying, physicochemical, soaking technique.

 

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APA Mathew, B. K., Adebowale, A. O., & Oladayo, B. O. (2018). Effect of traditional and modified grain-soaking methods on physicochemical characteristics and consumers’ acceptability of sorghum ogi. African Journal of Food Science, 12(3), 28-37.
Chicago Bolade K. Mathew, Anota O. Adebowale and Bolade O. Oladayo  . "Effect of traditional and modified grain-soaking methods on physicochemical characteristics and consumers’ acceptability of sorghum ogi." African Journal of Food Science 12, no. 3 (2018): 28-37.
MLA Bolade K. Mathew, Anota O. Adebowale and Bolade O. Oladayo  . "Effect of traditional and modified grain-soaking methods on physicochemical characteristics and consumers’ acceptability of sorghum ogi." African Journal of Food Science 12.3 (2018): 28-37.
   
DOI https://doi.org/10.5897/AJFS2017.1644
URL http://www.academicjournals.org/journal/AJFS/article-abstract/07D562055977

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