Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Effects of Thermal Treatment on Antioxidant Activity in Yam (Dioscorea batatas DECNE.)

  • Kim, Han-Soo (Department of Food Science and Technology, Pusan National University) ;
  • Duan, Yishan (Department of Food Science and Technology, Pusan National University) ;
  • Ryu, Jae-Young (Department of Urban Enviromental Engineering, Kyungnam University) ;
  • Kim, Sang-Woo (East Sea Fisheries Research Institute, NFRDI) ;
  • Jang, Seong-Ho (Department of Bioenviromental Energy, Pusan National University)
  • Received : 2015.02.05
  • Accepted : 2015.03.25
  • Published : 2015.03.30
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Abstract

The aim of this study was to investigate the antioxidant activity of thermal treatment yam (Dioscorea batatas DECNE.) in Korea. Thermal treatment yam was extracted by different solvents including 70% methanol, 70% ethanol and chloroform-methanol mixture (CM, 2:1, v/v). Then color property, total phenol content and antioxidant activity were analyzed. Yam possessed high $L^*$ value and $H\limits^{\circ}$ value, which were $54.92{\pm}2.18$ and $73.20{\pm}0.77$, respectively. Thermal treatment yam exhibited great antioxidant activity evaluated by ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt] radical scavenging activity, DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity, reducing power, and ferric reducing antioxidant power. Total phenol contents of various extracts from thermal treatment yam increased in the following order: 70% methanol extract ($63.53{\pm}0.33mg\;CAE/g$), 70% ethanol extract ($69.47{\pm}1.00mg\;CAE/g$) and CM extract ($97.49{\pm}0.66mg\;CAE/g$), respectively. The same trend was also could be found in antioxidant activity assays except for reducing power assay. These results implied that these extracts from thermal treatment yam might be useful to take a good part in prevention of human diseases and aging.

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References

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