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Effect of Dried Yam Extracts on Sausage Quality during Cold Storage

마 추출물 첨가가 소시지의 냉장 저장 중 품질특성에 미치는 영향

  • Pak, Jae-In (Department of Animal Products and Food Science, Kangwon National University) ;
  • Seo, Te-Su (Department of Animal Products and Food Science, Kangwon National University) ;
  • Jang, Aera (Department of Animal Products and Food Science, Kangwon National University)
  • 박재인 (강원대학교 동물생명과학대학 동물식품응용과학과) ;
  • 서태수 (강원대학교 동물생명과학대학 동물식품응용과학과) ;
  • 장애라 (강원대학교 동물생명과학대학 동물식품응용과학과)
  • Received : 2012.07.30
  • Accepted : 2012.11.21
  • Published : 2012.12.31

Abstract

This study was performed to evaluate the effect of yam (Diocorea japonica) extract by methanol on sausage quality during cold storage. Yam extracts were prepared by 70% methanol and concentrated using rotary evaporation. The total phenol contents of the extracts were 123.03 mg/g. 1,1'-diphenyl-2-picrylhydrazyl (DPPH) scavenging activity and super oxide dismutase (SOD) activity of the extracts were increased with dose dependently. Nitrite scavenging activity was also increased with the increase of concentration of yam extracts; in particular, 70 ${\mu}g/mL$ of the extracts showed 57.12% of nitrite scavenging activity. Sausages containing yam extracts showed lower pH than that of the control. In color, the lightness ($L^*$) of sausages with 1.0% of the yam extracts was lower than that of the control. Redness and yellowness of the sausages with 1.0% of the yam extracts were higher than those of the control. Thiobarbituric acid reactive substances (TBARS) value of the sausage with 1.0% of the extracts was lower than those of the control on days 9 and 12. However, the hardness of the sausage was increased with an increase in yam extracts. From these results, the yam extracts showed high antioxidant activity; moreover, it also retards the lipid oxidation of the sausages during cold storage. The yam extracts could be used as additives to prevent lipid oxidation of the sausage. Further study should be conducted in order to identify the optimum concentration of the extracts in meat products.

마 가루를 70% methanol로 추출하여 10, 30, 50, 70, 그리고 100 ${\mu}g/mL$의 농도가 되도록 제작한 후 항산화 활성검증에 사용하였으며 비교 항산화 물질로는 ascorbic acid를 이용하였다. 페놀성 화합물 함량은 $123.03{\pm}0.22$ mg/g으로 나타났으며 DPPH radical 소거능은 ascorbic acid와 다른 처리구와 비교하였을 때 100 ${\mu}g/mL$ 농도의 처리구에서 79.33%로 가장 높은 소거능을 보였다. SOD유사활성은 처리 농도의존적으로 증가하는 것을 보였으며, 100 ${\mu}g/mL$ 농도의 처리구에서 64.78%로 가장 높은 SOD유사활성을 나타났다. 마 가루를 동결 건조하여 분말화 한 다음 마 가루 추출물을 첨가하지 않은 대조구(C), 마가루 추출물 0.1% 첨가한 처리구(T1), 0.3% 첨가한 처리구(T2), 0.5% 첨가한 처리구(T3), 0.7% 첨가한 처리구(T4), 그리고 1.0% 첨가한 처리구(T5) 등 6개 처리구로 나누어 $4^{\circ}C$에서 12일간 저장하면서 3일 간격으로 저장성 실험에 사용하였다. pH 변화는 12일차에서 대조구(C)는 적정 pH 6.2를 넘긴 pH $6.31{\pm}0.03$을 나타냈고 처리구는 감소하는 경향을 보였는데 특히 T4 처리구에서 pH $6.14{\pm}0.09$로 대조구(C)와 처리구 간의 높은 유의적 차이를 나타냈다. 명도($L^*$)는 대조구(C)가 $66.73{\pm}0.03$로 가장 높은 수치를 나타내었고 마 가루의 첨가 비율이 높아질수록 $L^*$값은 낮은 수치를 나타냈다. 적색도($a^*$)는 T5 처리구의 저장 12일차에서 $9.89{\pm}0.32$로 가장 높은 수치를 나타냈고, 갈색도($b^*$)는 T5 처리구의 저장 12일차에서 $13.21{\pm}0.17$로 가장 높은 수치를 나타냈다. 지방산화도를 측정하는 TBARS 실험에서는 저장이 진행됨에 따라 대조구(C)가 가장 높은 수치를 보였으며, T4 처리구와 비교하였을 때 가장 높은 유의적 차이를 나타냈다. 조직감 측정에서 경도는 마 가루의 첨가 비율이 높아 질수록 경도가 높아졌다. 이상의 결과를 종합적으로 고찰해 보면 마 가루 methanol 추출물이 소시지 제조에 첨가된 비율이 높아질수록 지방의 산화가 감소하며 소시지의 저장성 증진에 효과적이나 경도가 증가하고 적색도와 갈색도가 증가하여 품질에 부정적인 영향이 없는 0.1-0.3% 농도의 선정이 바람직할 것으로 판단된다.

Keywords

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