Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Oxidative Stability and Antioxidant Changes in Perilla Seeds and Perilla Oil Affected by UV Irradiation

들깨 및 들기름의 자외선 조사 중 지방질 산화와 산화방지제의 변화

  • 왕선영 (인하대학교 생활과학대학 식품영양학과) ;
  • 최은옥 (인하대학교 생활과학대학 식품영양학과)
  • Received : 2011.07.22
  • Accepted : 2011.08.29
  • Published : 2012.02.29
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Abstract

Effects of UV irradiation on lipid oxidation in perilla seeds and perilla oil were evaluated by determining the contents of peroxides, conjugated dienoic acids, and thiobarbituric acid reactive substances, and analyzing fatty acid composition. Tocopherols and polyphenol contents were also determined. Perilla seeds were unroasted or roasted at $180^{\circ}C$ for 20 min, and perilla oil was obtained by pressing the roasted perilla seeds. Lipid oxidation during UV irradiation was higher and faster in perilla oil than that in perilla seeds, with a slight loss of linolenic acid. Unroasted perilla seeds were more oxidation-stable than roasted seeds. Tocopherols and polyphenols were degraded during UV irradiation, with a higher degradation rate observed in unroasted perilla seeds than in roasted ones. Antioxidant concentration dependency of the lipid oxidation during UV irradiation was higher in perilla oil than that in perilla seeds, and the contribution of polyphenols to oxidative stability was higher than that of tocopherols in all samples.

자외선 조사는 들깨와 들기름에서 지방질 산화를 유발하였으며 들기름에 비해 들깨의 산화안정성이, 볶은 들깨에 비해 생 들깨의 유지 산화안정성이 우수하였다. 자외선 조사 중 들깨와 들기름에 존재하는 토코페롤과 폴리페놀 화합물은 분해되었으며 분해 속도는 들기름보다 들깨에서, 볶은 들깨보다 생 들깨에서 높았다. 또한 자외선 조사 중 들깨에 비해 들기름이 산화방지제 농도에 더욱 민감하게 영향을 받았으며, 토코페롤에 비해 폴리페놀 화합물이 들깨 및 들기름의 산화방지에 높은 기여도를 보였다.

Keywords

References

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