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http://dx.doi.org/10.11002/kjfp.2017.24.3.334

Comparison of the content of bioactive substances and antioxidative activity between conventionally and organically cultivated brown rice (Oryza sativa L.)  

Kim, Gee An (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Cho, Jeong-Yong (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Lee, You Seok (Jeonnam Agricultural Research and Extension Services)
Lee, Hyoung Jae (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Jeong, Hang Yeon (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Lee, Yu Geon (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Moon, Jae-Hak (Department of Food Science and Technology, and BK21 Plus Program, Chonnam National University)
Publication Information
Food Science and Preservation / v.24, no.3, 2017 , pp. 334-342 More about this Journal
Abstract
The content of bioactive substances and antioxidative activity in conventionally grown brown rice (CGBR) and organically grown brown rice (OGBR) were compared. Minerals (mg/100 g) such as magnesium (OGBR, $168.59{\pm}2.62$; CGBR, $121.43{\pm}2.22$), copper (OGBR, $0.50{\pm}0.06$; CGBR, $0.41{\pm}0.05$), and manganese (OGBR, $4.70{\pm}0.04$; CGBR, $2.49{\pm}0.02$) were higher in OGBR than in CGBR (p<0.05). In addition, levels of (${\mu}g/100g$) vitamins B2 (OGBR, $27.22{\pm}2.56$; CGBR, $22.12{\pm}2.24$) and B6 (OGBR, $46.32{\pm}2.66$; CGBR, $39.91{\pm}3.32$) were higher in OGBR than in CGBR (p<0.05). The contents (mg/100 g) of ${\beta}$-sitosterol (OGBR, $27.40{\pm}2.79$; CGBR, $24.75{\pm}1.06$), total phenolic (OGBR, $6.72{\pm}0.02$; CGBR, $6.64{\pm}0.02$), and ferulic acid (OGBR, $1.75{\pm}0.45$; CGBR, $1.11{\pm}0.14$) as well as the antioxidative activity (OGBR, $53.09{\pm}1.90%$; CGBR, $48.29{\pm}3.38%$) evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging assay were higher in OGBR than in CGBR, although no significant differences between samples were observed. In comparison to the control group, brown rice samples significantly inhibited cholesteryl ester hydroperoxide formation in rat plasma subjected to copper ion-induced lipid peroxidation. The inhibitory effect of OGBR was higher than that of CGBR. These results indicate that OGBR showed higher levels of bioactive substances and enhanced antioxidative activity than CGBR, although the differences were not statistically significant.
Keywords
brown rice; organic agricultural products; bioactive substances; antioxidant activity; rat blood plasma;
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