감마 오리자놀이 리놀산 및 분쇄돈육의 항산화효과에 미치는 영향
Effect of γ-Oryzanol on Lipid Oxidation of Linoleic Acids and Ground Pork
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미강으로부터 추출한 감마 오리자놀을 리놀산 및 분쇄돈육에 0.02%, 0.05%, 0.10% 0.15% 및 0.20%(w/w) 농도로 첨가하여 항산화효과를 조사하였다. 감마 오리자놀을 첨가한 리놀산은 40℃에서 10일간 저장시 대조구와 비교하여 유의적으로 낮은 peroxide 값을 나타냈으며(P<0.05), 또한 감마 오리자놀 처리구는 첨가농도가 증가할수록 낮은 peroxide 값을 나타냈다. 분쇄생돈육에 0.05%, 0.10%, 0.15% 및 0.20%의 감마 오리자놀을 첨가하여 4℃에서 6일간 저장한 결과 감마 오리자놀을 0.20% 첨가한 처리구가 저장기간 동안 합성항산화제인 BHA와 유사한 수준의 TBARS 값을 나타냈다. 분쇄가열돈육에서도 감마 오리자놀을 첨가하여 4℃에서 4일간 저장한 결과 감마 오리자놀을 0.05% 이상 첨가한 처리구들은 대조구와 비교하여 유의적으로 낮은 TBARS 값을 나타냈으며(P<0.05) 분쇄생돈육에서와 같이 감마 오리자놀을 0.20% 첨가한 처리구의 TBARS 값이 저장기간 동안 가장 낮은 수준으로 나타났다. 따라서 본 연구결과 감마 오리자놀은 신선육에 0.20% 이상, 가열육에는 >0.05% 사용이 적절한 것으로 보인다. 따라서 감마 오리자놀은 식육 및 육제품에 항산화제로서 사용이 가능할 것으로 기대된다.
Abstract
Gamma-oryzanol was prepared from rice bran, and added at 0.05%, 0.10%, 0.15% or 0.20%(w/w) to linoleic acid and ground pork to determine their antioxidant effect. Linoleic acid containing γ-oryzanol had significantly lower peroxide values than the control during the storage of 10 days at 40℃ compared to the control (P<0.05). The peroxide values of linoleic acids containing γ-oryzanol decreased as the addition level increased (P<0.05). Raw ground pork patties containing oryzanol 0.20% had significantly lower thiobarbituric acid reactive substances (TBARS) values as equivalent with butylated hydroxy anisole(BHA) when stored at 4℃ for 6 days. Cooked ground pork patties containing more than 0.05% of γ-oryzanol showed lower TBARS values than those containing BHA during storage at 4℃ for 4 days (P<0.05). This study indicated that γ-oryzanol can be used to inhibit lipid oxidation for meat and meat products.
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