|
KMID : 0380620100420010014
|
|
Korean Journal of Food Science and Technology
2010 Volume.42 No. 1 p.14 ~ p.20
|
|
|
Changes in Natural Antioxidants in Oils Extracted from the Bran and Germ of Keumkang and Dark Northern Spring Wheats During Photo-oxidation
|
|
Choi Hyun-Ki
Choe Eun-Ok
|
|
|
Abstract
|
|
|
|
Naturally present antioxidants, tocopherols, carotenoids, and phospholipids in the bran and germ oils from Keumkang (K-WBG oil) and Dark Northern Spring wheats (DNS-WBG oil) were determined during storage under 1700 lux light at 5oC by HPLC. Oil oxidation was monitored by peroxide values (POV) and conjugated dienoic acid content. The results showed that antioxidants were degraded during storage of the WBG oils under light, with higher degradation rates for carotenoids and phospholipids in the K-WBG oil compared to the DNS-WBG oil. Light increased oil oxidation and the rate of oxidation was higher in K-WBG oil than in the DNS-WBG oil. There was a high correlation between POV and residual amounts of antioxidants during photo-oxidation, with phospholipids showing the greatest effects on POV. This study suggests that a higher amount and lower degradation rate of phospholipids in the DNS-WBG oil contributed to its higher photo-oxidative stability compared to the K-WBG oil.
|
|
|
KEYWORD
|
|
|
photo-oxidation, wheat bran and germ oils, antioxidants, Keumkang wheat, Dark Northern Spring wheat
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|