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Conjugated linoleic acid-triglyceride가 함유된 프레스햄 품질특성

Quality Characteristics of Press Ham Containing Conjugated Linoleic Acid-Triglyceride

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참고문헌

주제분류축산학

초록

CLA는 alkaline isomerization 방법으로 식용유를 이용하여 화학적으로 합성하였으며, CLA- TG는 sodium methoxide를 이용하여 화학적으로 합성하였다. 일반적인 프레스햄을 대조구로 설정하고, CLA-TG 첨가수준을 달리하여 4 처리구로 설정하였으며, 첨가되는 등지방 중량에 대하여 처리구별로 5%(처리구 1), 10%(처리구 2), 15%(처리구 3), 20%(처리구 4)를 대체하여 프레스햄을 제조한 후 진공포장하여 냉장온도(4℃)에서 1, 7, 14, 21 및 28일간 저장하면서 전단가, 관능적 특성분석, 지방산화 및 지방산조성 변화 등을 조사하여 품질 특성을 규명하고자 실시하였다. 전단가는 처리구간의 비교에서 저장 21일까지 대조구가 CLA-TG 처리구에 비하여 유의적으로 높은 전단가를 보였다(P<0.05). 저장기간의 경과에 따른 변화에서는 전 처리구가 저장기간이 경과함에 따라 전단가가 높아지는 경향을 보였다. 관능검사 항목인 제품색, 향기, 조직감 및 전체적인 기호성은 대조구와 CLA-TG 처리구간에 유의적인 차이가 없었으며, 저장기간에 따른 제품의 제품색, 향기, 조직감 및 전체적인 기호성 변화는 모든 처리구가 저장기간이 경과하여도 유의적인 차이가 없었다. 지방산화는 전 저장기간동안 대조구에 비하여 CLA-TG 처리구가 낮았으며, 특히 저장 7, 21, 28일째는 유의적으로 낮은 지방산화를 보였다(P<0.05). 저장기간에 따른 지방산화 값의 변화는 대조구와 CLA-TG 처리구 모두 저장기간이 경과함에 따라 유의적으로 높게 나타났다(P<0.05). 지방산 조성 및 CLA 함량은 대조구에 비하여 CLA-TG 처리구가 C14:0~C20:4 지방산 함량이 유의적으로 감소하였다(P<0.05). CLA 함량은 CLA-TG를 첨가하지 않은 대조구는 CLA가 검출되지 않았지만 CLA-TG 처리구에서는 CLA-TG 대체수준이 증가할수록 제품내 축적율이 직선적으로 증가하였다. 불포화지방산 함량은 CLA-TG 첨가수준이 증가할수록 유의적으로 증가하였다(P<0.05). 이상의 결과 프레스햄 제조시 CLA-TG의 첨가는 관능적 특성에 영향을 미치지 않으며, 제품의 저장기간을 연장 및 CLA를 축적시키는 것이 가능하여 고급 육제품 생산이 가능하다고 사료된다.

Abstract

CLA was chemically synthesized by alkaline isomerization method using corn oil. CLA-TG was synthesized by chemical reaction using sodium methoxide. For the control, 10% of back fat among the total component was only added without the annex of CLA-TG. For the first treatment, 5% of CLA-TG among the lard component added into the press ham was replaced. For the 2nd, 3rd and 4rd treatments, 10%, 15% and 20% of CLA-TG was respectively replaced. Manufacture press ham using CLA-TG were vacuum packaged and then stored during 1, 7, 14, 21 and 28 days at 4℃. Samples were analyzed for shear force value, sensory evaluation, TBARS, fatty acid composition and CLA content. Shear force value of control was significantly higher than that of CLA-TG treatment groups(P<0.05). All treatments were increased by the passage of storage time. No remarkable differences were found in sensory properties among control and CLA-TG treatment groups. CLA-TG treatment groups showed significantly(P<0.05) lower TBARS value than the control. TBARS value was increased significantly during storage in all treatment. In the change of fatty acid composition, the contents of C14:0~C20:4 were decreased significantly by CLA-TG additive. Whereas the increase level of CLA-TG additive resulted in the significantly higher unsaturated fatty acid and CLA content. Summing up the a forementioned results, press ham manufacturing with CLA-TG additive was not affected in sensory evaluation. Also, it may be assumed that the high quality press ham can be manufactured with the extent of storage period and CLA accumulation.

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