한국식품조리과학회지 (Korean journal of food and cookery science)

  • 제26권3호
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  • Pages.323-329
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  • 2010
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  • 2287-1780(pISSN)
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  • 2287-1772(eISSN)
한국식품조리과학회 (Korean Society of Food and Cookery Science)
권호 표지

과실유래 단백질 조효소액과 과육의 근원섬유 분해 효과에 관한 연구

Proteolytic Effect of Fruit Flesh and Crude Enzyme Extract from Fruits on Myofibrilar Protein

  • 투고 : 2010.03.05
  • 심사 : 2010.06.03
  • 발행 : 2010.06.30
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초록

국내산 무화과, 키위, 배, 파인애플은 단백분해효과가 알려져 조리 중에 쓰여지고 있으나 체계적인 연구가 부족한 상태이다. 이에 이들 과실로부터 조효소액을 추출하여 그 특성을 연구하고 과실을 직접 소고기에 처리하여 연육효과를 살펴보고자 하였다. 과실에서 조효소액을 추출한 후 카제인과 근원섬유에 대한 단백분해 능력을 측정한 결과 파인애플 > 키위 > 무화과 > 배의 순서로 나타났다. 이 조효소액을 근원섬유 단백질에 처리하여 전기영동을 실시한 결과 배를 제외하고 조효소액의 농도를 증가시켜 처리할수록 myosin heavy chain이 170,000D 이하로 붕괴됨을 볼 수 있었다. 연육작용 측정에 가장 적합하다고 알려진 소편화율을 관찰한 결과, 파인애플 > 키위 > 무화과 > 배로서 근원섬유단백질 분해 활성의 순서와 같았다. 소고기에 갈은 과육을 5% 및 10%로 처리하였을 때 침지액의 가용성 질소량을 측정한 결과, 과실 처리구 모두에서 대조구보다 높은 가용성 질소량을 나타내었다. 과실을 갈아 소고기에 처리한 후 가열하여 전단력을 측정한 결과, 파인애플이 연육에 가장 효과적인 것으로 나타났으며, 배는 효과가 적은 것으로 나타났다. 소고기에 갈은 과실을 넣고 숙성하여 가열한 후 텍스쳐를 측정한 결과, springiness와 gumminess의 경우 파인애플이 가장 효과적인 것으로 나타났으며 키위도 상당히 효과적인 것으로 나타났다. 과육의 연육효과를 평가한 결과, 5% 첨가시 연도의 경우는 파인애플과 키위가 가장 연한 것으로 나타났고 기호도의 경우 모든 과실에서 10% 첨가보다 5%가 더 높은 기호도를 나타내었다.

Studies on the tenderizing effect of fruits has been limited even though fig, kiwifruit, pear, and pineapple cultivated in Korea are utilized commonly during cooking for their proteolytic properties. Therefore, the characteristics of these fruits were investigated by treating beef with their crude protease extracts. The protease effects of crude protease extract from the fruits on casein and myofibrilar protein were in the following order : pineapple > kiwifruit > fig > pear. Electrophoretic analysis results found that pineapple, kiwifruit, and fig cleaved myosin heavy chain into smaller fragments. The myofibrilar fragmentation ratio of crude protease extracts was the highest for pineapple whileas the lowest for pear. Ground fruits (5% and 10%) increased amounts of soluble nitrogen and decreased shear force of beef. Pineapple was the most effective while pear was the least effective. Decrease in springiness and gumminess was observed by texture profile analysis of beef treated with fruits, especially pineapple and kiwifruit. Among the 5% treatments, pineapple and kiwifruit produced the highest tenderness. Additionally, 10% treatment was less preferable than the 5% treatment.

키워드

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