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Lipid Oxidation and Antioxidant Changes in Perilla Seeds during Heating

가열에 의한 들깨의 지방질 산화와 산화방지제의 변화

  • 왕선영 (인하대학교 생활과학대학 식품영양학과) ;
  • 최은옥 (인하대학교 생활과학대학 식품영양학과)
  • Received : 2011.07.01
  • Accepted : 2011.08.10
  • Published : 2011.12.31

Abstract

Effects of heating conditions and seed roasting on the lipid oxidation and antioxidants of perilla seeds were studied. Perilla seeds, that were unroasted or roasted at $180^{\circ}C$ for 20 min, were ground and heated over steam at $100^{\circ}C/1$ atm or at $135^{\circ}C/2$ atm. Lipid oxidation was evaluated by peroxide value, conjugated dienoic acids contents, and fatty acid composition. Tocopherols and polyphenols were also determined. Lipid oxidation of perilla seeds was higher during heating at $135^{\circ}C/2$ atm than at $100^{\circ}C/1$ atm, and the oxidation rate was lower in unroasted seeds than in roasted seeds. Degradation of tocopherols and polyphenols in perilla seeds during heating was faster under high pressure and temperature, and was decreased by seed roasting. Contribution of polyphenols to the oxidative stability of perilla seeds during heating was higher than that of tocopherols, suggesting polyphenols and seed roasting as important factors in lipid oxidation of perilla seeds.

들깨의 가압가열 처리 중 들깨지방질의 산화정도와 토코페롤 및 폴리페놀 화합물의 분해는 들깨의 볶음 여부와 가열 조건에 따라 차이가 있었다. 가압가열 처리 중 볶은 들깨보다 생 들깨에서 지방질 산화 안정성은 높았으나, 산화방지제의 안정성은 낮았다. 또한 토코페롤보다는 폴리페놀 화합물이 들깨의 가압가열 중 지방질산화에 기여한 정도가 더 높았다. 그러므로 들깨를 들깨죽 제조에 적용할 때 폴리페놀 화합물의 농도와 안정성을 개선할 수 있는 방법을 모색함으로써 보다 높은 품질의 들깨 적용 식품을 생산하는데 도움이 될 것이다.

Keywords

References

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