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Technical note: an alkali degradation test and an alcoholic alkali bran-staining test for determining the approximate degree of milling of rice.

Bhattacharya, K. R. and Sowbhagya, C. M. (1976) Technical note: an alkali degradation test and an alcoholic alkali bran-staining test for determining the approximate degree of milling of rice. Journal of Food Technology, 11 (3). 309-312, 5 ref..

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Abstract

The alkali degradation test developed involves placing 5-6 kernels in a 5-cm diam. Corning Petri dish stranding on a black sheet, covering the kernels with 10 ml of 2% NaOH, covering the dish and leaving undisturbed, preferably overnight. The endosperms are rapidly attacked and completely gelatinized within 3-4 h, the detached residual bran layers standing out very well against a nearly transparent background. The approximate degree of milling is determined from the nature and amount of the separated bran layers by means of a score card. The alcoholic alkali bran-staining test developed involves placing 1 g kernels in a 5-cm diam. Corning Petri dish placed on a white background, and covering the kernels with 10 ml of 2% aqueous KOH:ethyl alcohol (or denatured spirit) (1:2, v/v) solvent. After 15-30 min, the kernel are carefully observed with a magnifying glass and the relative size and amount of the yellow-brown patches or streaks are noted and the degree of milling assessed by means of a score card. Both methods should prove suitable for determining the approximate degree of milling of rice.

Item Type: Article
Uncontrolled Keywords: ALKALIES-; rice, milling degree detn. alkalies degradation tests for; MILLING-; rice, milling degree detn. tests for; RICE-; milling degree detn. tests for rice; BRAN-; rice, milling degree detn. alcoholic alkali bran staining tests for
Subjects: 600 Technology > 08 Food technology > 21 Cereals > 01 Rice
600 Technology > 08 Food technology > 04 Milling
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 09 Apr 2013 11:50
Last Modified: 09 Apr 2013 11:50
URI: http://ir.cftri.com/id/eprint/7091

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