Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice
Dehulled glutinous black rice (cv. Kam Doi Saket) was abrasively milled (0-60 s) to make a degree of milling (DOM) curve. The curve showed a nonlinear relationship between milling time and DOM. The slope sharply increased in the first 20 s; after this point, the increase was moderate. The redness of...
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th-cmuir.6653943832-475242018-04-25T08:40:59Z Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice Thunnop Laokuldilok Suthat Surawang Jitra Klinhom Dehulled glutinous black rice (cv. Kam Doi Saket) was abrasively milled (0-60 s) to make a degree of milling (DOM) curve. The curve showed a nonlinear relationship between milling time and DOM. The slope sharply increased in the first 20 s; after this point, the increase was moderate. The redness of grain and flour surprisingly increased after milling, and the highest value was found at 20 s of milling. Protein, fat, and crude fiber were not uniformly distributed in the dehulled rice kernel. The rice retained only 76.95, 32.79, 20.24, and 36.57% of protein, fat, crude fiber, and ash, respectively, after milling for 60 s. Anthocyanins, γ-oryzanol, and α-tocopherol decreased by 74.49, 55.35, and 70.36%, respectively, after 10 s of milling. The scavenging activity decreased sharply when milling was carried out for longer than 30 s. The methanolic extract from rice milled for 60 s showed the lowest activity, which was 21.1 times lower than that of the dehulled rice extract. It was concluded that milling for 20 s was sufficient to remove most of the bran layer of the black rice sample, but 10 s of milling retained higher contents of nutritional components and rice antioxidants. © 2013 AACC International, Inc. 2018-04-25T08:40:59Z 2018-04-25T08:40:59Z 2013-11-01 Journal 00090352 2-s2.0-84888344069 10.1094/CCHEM-01-13-0014-R https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84888344069&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/47524 |
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Dehulled glutinous black rice (cv. Kam Doi Saket) was abrasively milled (0-60 s) to make a degree of milling (DOM) curve. The curve showed a nonlinear relationship between milling time and DOM. The slope sharply increased in the first 20 s; after this point, the increase was moderate. The redness of grain and flour surprisingly increased after milling, and the highest value was found at 20 s of milling. Protein, fat, and crude fiber were not uniformly distributed in the dehulled rice kernel. The rice retained only 76.95, 32.79, 20.24, and 36.57% of protein, fat, crude fiber, and ash, respectively, after milling for 60 s. Anthocyanins, γ-oryzanol, and α-tocopherol decreased by 74.49, 55.35, and 70.36%, respectively, after 10 s of milling. The scavenging activity decreased sharply when milling was carried out for longer than 30 s. The methanolic extract from rice milled for 60 s showed the lowest activity, which was 21.1 times lower than that of the dehulled rice extract. It was concluded that milling for 20 s was sufficient to remove most of the bran layer of the black rice sample, but 10 s of milling retained higher contents of nutritional components and rice antioxidants. © 2013 AACC International, Inc. |
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Thunnop Laokuldilok Suthat Surawang Jitra Klinhom |
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Thunnop Laokuldilok Suthat Surawang Jitra Klinhom Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
author_facet |
Thunnop Laokuldilok Suthat Surawang Jitra Klinhom |
author_sort |
Thunnop Laokuldilok |
title |
Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
title_short |
Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
title_full |
Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
title_fullStr |
Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
title_full_unstemmed |
Effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
title_sort |
effect of milling on the color, nutritional properties, and antioxidant contents of glutinous black rice |
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2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84888344069&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/47524 |
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