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Evaluation of Antioxidant Activity in Pork Patties Containing Bokbunja (Rubus coreanus) Extract

복분자 추출물을 첨가한 돈육패티의 항산화 활성평가

  • Park, Sun-Young (Department of Animal Science and Institute of Agricultural Science and Technology, Chonnam National University) ;
  • Chin, Koo-Bok (Department of Animal Science and Institute of Agricultural Science and Technology, Chonnam National University)
  • 박선영 (전남대학교 동물자원학부 및 농업과학기술연구소) ;
  • 진구복 (전남대학교 동물자원학부 및 농업과학기술연구소)
  • Published : 2007.12.30

Abstract

This study was performed to investigate the physicochemical properties and antioxidative activities of water or methanol extracts of Bokbunja (Rubus coreanus), and pork patties containing bokbunja extract at various levels. The total phenolic content of methanol extract (6.76 g/100 g, dry base) was higher than that of water extract (3.38 g/100 g, dry base). In addition, methanol extract had higher 1,1'-diphenyl-2-picrylhdrazyl (DPPH) radical scavenging activity than water extract at low concentrations (0.025-0.1%). However, no significant differences were found at high concentrations (0.2% or higher) (p>0.05). The DPPH radical scavenging activities of methanol and water extracts were 76.97% and 74.87% at 0.2% level, respectively. The lightness and yellowness values of pork patties containing Bokbunja extract decreased with increasing concentrations. The thiobarbituric acid reactive substances (TBARS) in pork patties with Bokbunja extract were lower than that of the control (p<0.05). The antioxidative activities increased with increasing concentrations of Bokbunja extract. In conclusion, Bokbunja extract might be used as a natural antioxidant in meat products, however levels lower than 3% will be required to prevent quality defects in pork patties.

본 연구는 복분자 열매를 수분과 메탄올로 추출한 후 그 항산화 특성을 측정하고, 복분자즙을 돈육패티에 첨가하여 항산화력과 이화학적 특성을 알아보기 위하여 수행하였다. 각 추출물의 총 페놀 함량은 메탄올 추출물이 6.76 g/100 g으로 수분 추출물보다 높았다. 메탄올 추출물의 전자공여능은 농도에 따라 33.6-76.9%, 물 추출물은 17.2-74.8%로 나타났고 농도가 증가함에 따라 전자공여능도 증가하는 경향을 보였다. Iron chelating ability와 reducing power에 있어서 복분자 추출물들은 뚜렷한 활성을 보이지 않았다. 복분자즙이 첨가된 돈육 패티의 이화학적 분석결과 복분자 첨가량이 증가 할수록 명도 및 황색도는 감소하였다. TBARS의 증가율은 복분자즙을 첨가한 처리구가 대조구에 비해 낮은 수치를 나타내었고 복분자즙의 농도가 증가 할수록 높은 항산화력을 나타내었다. 이상의 결과로 미루어 볼 때 복분자 추출물의 경우 효과적인 항산화성을 나타낸 것으로 보아 천연 항산화제로의 식육에 이용 가능성이 있다고 평가되며 과량이 첨가 될 경우 발색에 영향을 주어 복분자즙을 3% 이내로 첨가하는 것이 바람직 할 것으로 판단된다.

Keywords

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