ISSN:
1573-9104
Keywords:
brown rice
;
protein content
;
protein distribution
;
milling loss
;
endosperm
;
Oryza sativa
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Brown rice of IR36 and IR42 check samples from the 1982 dry and wet season yield trials showed good correlation of milled-rice protein and brown-rice protein (r=0.97**,n=40) with 10% bran-polish removal by an emery abrasive mill. Among selected grain samples of both varieties, 80 to 86% of brown-rice protein was retained in the milled rice with both friction and abrasive mills. Stereological morphometry of 1-µm-thick sections showed that endosperm storage protein decreases in amount with increasing distance from the aleurone layer. A similar protein gradient was found in both average-protein and high-protein samples. Milling removed all of the pericarp, seed coat and nucellus, and virtually all of the aleurone layer and embryo, but removed very little of the nonaleurone endosperm, except from the lateral ridges.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01091749
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