Factors Affecting the Color and Appearance of Sorghum Starch

Subramanian, V and Hoseney, R C and Bramel-Cox, P J (1994) Factors Affecting the Color and Appearance of Sorghum Starch. Cereal Chemistry, 71 (3). pp. 275-278. ISSN 0009-0352

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Abstract

Seven cultivars of grain sorghum with various seed colors were studied for the presence of light-absorbing substances in the grain and starch. A corn sample was used for comparison. Starch was isolated from both sorghum and corn. Corn starch was bright in appearance and had a yellowish tinge. Sorghum starch from the cultivars Dorado, UANL-1-V-187, and Blanco 88 was also bright in appearance and white; the seed color was pale yellow. Although Sorghum cultivar Dekalb 42Y had a pale yellow seed color, it yielded a dull-appearing starch. Kansas local, Bajio, and Tamaulipas cultivars had reddish-brown seed color and also yielded dull-appearing starch that had a reddish tint. It appears that the presence of certain alcohol-soluble components contributes to the dullness of some sorghum starches, because extraction of dull starch with methanol resulted in a brighter starch. Dehulling of the grain before starch isolation improved the appearance of starch. A simple alkali test on the grain was effective in predicting the dullness of starch.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Sorghum
Depositing User:	Mr Charan Sai Ch
Date Deposited:	20 Oct 2011 14:03
Last Modified:	02 Nov 2011 06:00
URI:	http://oar.icrisat.org/id/eprint/3042
Official URL:	http://www.aaccnet.org/cerealchemistry/abstracts/1...
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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