Relationship between rice sample milling conditions and milling quality

被引:0
|
作者
Pan, Z.
Amaratunga, K. S. P.
Thompson, J. E.
机构
[1] USDA ARS, Western Reg Res Ctr, Processed Foods Res Unit, Albany, CA 94710 USA
[2] Univ Calif Davis, Dept Biol & Agr Engn, Davis, CA 95616 USA
来源
TRANSACTIONS OF THE ASABE | 2007年 / 50卷 / 04期
关键词
degree of milling; head rice yield; milling; quality; rice; temperature; total rice yield; whiteness;
D O I
暂无
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The objective of this study was to evaluate the effect of milling conditions on milling quality of medium grain rough rice M202. Using a McGill No. 3 mill, the conditions studied were milling weight and duration, and polishing weight and duration. This research examined the relationships among the milled rice quality parameters, namely total rice yield, head rice yield, whiteness index, and total lipid content. Head rice yield was more sensitive to changes in milling conditions than total rice yield. It decreased by 4.6 percentage points when milling weight was increased from 2.72 to 6.36 kg. Milling weight and milling duration had more influence on head rice yield than polishing weight and duration. For both milling and polishing, using lower weights for a longer duration could increase head rice yield without changing the whiteness compared to the standard procedures of the USDA Federal Grain Inspection Service. The total lipid content of milled rice, measured using a near-infrared (NIR) method, correlated well with the whiteness index. This indicates that the NIR method could be used as an alternative to the whiteness index for measuring the degree of milling. Over-milling significantly decreased head rice yield with little improvement in whiteness. The milling quality of M202 can be predicted by using the developed non-linear regression models when the milling and polishing conditions are known.
引用
收藏
页码:1307 / 1313
页数:7
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