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KMID : 0613820130230040554
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Journal of Life Science
2013 Volume.23 No. 4 p.554 ~ p.559
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Analysis on Physical Changes of Pectinase-Treated Brown Rice (Oryza sativa)
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Pih Kyung-Tae
Kim Keun-Cheol
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Abstract
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Brown rice (Oryza sativa) is rich in nutrients, including dietary fiber, vitamins, minerals, and other unmeasured constituents, as well as carbohydrates. Brown rice is an applicable staple for chronic diseases, such as diabetes and hyperlipidemia, but it is not commonly used in dietary management due to several reasons. In this study, we investigated the possibility of using digestive enzymes to process brown rice. When the weight of the brown rice was measured after packing in the same volume of water, it was increased in pectinase-treated brown rice compared to control or collagenase-treated brown rice. Using SEM analysis, we observed huge scratches and nanopores on the surface of the brown rice after the pectinase treatment, but the nutritional components were preserved. We also analyzed the water adsorption rate and performed a starch reaction assay to examine the physical changes after the pectinase treatment. The pectinase-treated brown rice showed a higher water adsorption rate and a faster starch reaction than the nontreated brown rice. These results suggest that digestive enzymes like pectinase can aid the nutritional preservation of brown rice and improve its taste.
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KEYWORD
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Brown rice, pectinase, process, nutrition, taste
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