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http://dx.doi.org/10.11002/kjfp.2017.24.4.491

Changes in pasting properties and free fatty acids of different brown rice cultivar during storage  

Choi, Induck (National Institute of Crop Science, RDA)
Kwak, Jieun (National Institute of Crop Science, RDA)
Yoon, Mi-Ra (National Institute of Crop Science, RDA)
Chun, Areum (National Institute of Crop Science, RDA)
Choi, Dong-Soo (National Institute of Agricultural Science, RDA)
Publication Information
Food Science and Preservation / v.24, no.4, 2017 , pp. 491-496 More about this Journal
Abstract
Paddy rice is typically stored during postharvest until rice grain is processed into brown rice and milled rice by hulling and milling procedure, respectively. Recently, instead of storing paddy rice, storage of brown rice has been in the spotlight because it is more convenient and economically feasible. Different brown rice cultivars with varying amylose contents including waxy rice, medium-waxy rice, and non-glutinous rice were stored in room temperature storage for four months, and the changes in grain qualities of brown rice were evaluated. Amylose content significantly affected pasting properties in which rice cultivar with higher amylose content showed longer pasting time and higher peak viscosity. Storage also affected pasting viscosities, showing an increase in peak viscosity, but a decrease in breakdown viscosity. The changes in pasting viscosity during storage could be an important starch property for aged brown rice utilization. Waxy brown rice showed the weakest aging property in terms of free fatty acids (FFA) accumulation, whereas non-glutinous rice was more substantial grain quality against aging. The FFA values of two months storage were not significantly different from the initial FFA contents, suggesting that brown rice stored in room temperature for two months could be feasible for direct consumption of brown rice.
Keywords
brown rice; storage; free fatty acids; pasting properties;
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