Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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Evaluation of Rheological Properties of Pork Myofibrillar Protein with Tapioca Starch and its Utilization to the Pork Model Sausages

타피오카 전분을 첨가한 돈육 근원섬유 단백질의 물성 특성 및 돈육 모델소시지에 이용

  • Shon, Se-Ra (Department of Animal Science and Functional Foods Research Institute, Chonnam National University) ;
  • Chin, Koo-Bok (Department of Animal Science and Functional Foods Research Institute, Chonnam National University)
  • 손세라 (전남대학교 동물자원학부 및 기능성 식품연구센터) ;
  • 진구복 (전남대학교 동물자원학부 및 기능성 식품연구센터)
  • Received : 2012.01.09
  • Accepted : 2012.04.20
  • Published : 2012.06.30
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Abstract

In order to investigate the rheological properties of myofibrillar protein (MP) mixed with tapioca starch (TS; 0, 1, and 2%) at various salt concentrations (0.1, 0.3, and 0.45 M), viscosity, gel strength, differential scanning calorimeter (DSC) and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) were measured. Viscosity of MP increased with increasing salt concentrations (p<0.05), but not with the addition of TS. The addition of TS improved gel strength and cooking yield at all salt concentrations (p<0.05). DSC results demonstrated that the starting peak of TS gelation was observed at $55^{\circ}C$, however, no differences in peak were observed with various salt and TS levels (p>0.05). SDS-PAGE profile also showed no differences in protein bands for pork myofibrillar protein with various salt and TS levels. Based on the model study, pork model sausages with various levels of tapioca (0, 1, and 2%) and TG (1%) were manufactured. The pork model sausages with 2% TS increased pH and water holding capacity (p<0.05), while those with TGase (1%) increased most textural properties, regardless of the addition of TS. Thus, the combination of 1% TG with 2% TS improved the gel strength and water holding capacity in the meat products.

본 연구는 돈육 근원섬유 단백질에 식염의 농도와 타피오카 전분의 첨가량을 달리하여 점도, 겔 강도, 가열감량, 열량분석 및 전기영동의 변화를 관찰하여 근원섬유 단백질의 물성에 어떠한 영향을 주는지 알아보기 위해 실시하였다. 점도를 측정한 결과 식염의 농도가 증가함에 따라 혼합물의 점도가 유의적으로 증가하였으나, 타피오카 전분의 첨가에 따른 효과는 보이지 않았다(p<0.05). 겔강도는 식염의 농도와 타피오카 전분의 상호작용이 나타났고 식염의 농도와 타피오카 전분의 첨가량이 증가함에 따라 유의적으로 증가하였다(p<0.05). 가열감량에서도 타피오카 전분의 첨가로 인해 효과를 보여, 가열감량이 유의적으로 감소하였다(p<0.05). 열량분석을 통해 단백질의 변성을 관찰한 결과 $55^{\circ}C$에서 타피오카 전분이 겔을 형성하기 시작하는 피크가 보였으며, 그 이외의 피크에서는 식염의 농도와 타피오카 전분에 의한 피크 차이를 보이지 않았다. 전기영동의 결과 식염의 농도와 타피오카 전분의 첨가에 따른 단백질 분획 간의 큰 차이를 보이지 않았다. 따라서 근원섬유 단백질에 타피오카 전분을 첨가함으로써 겔 강도와 가열수율을 향상시키는 것으로 평가되었으며, 이러한 결과를 기초로 모델소시지를 제조하였다. 모델소시지의 결과로 2% 타피오카 첨가에 의해서는 유리수분이 낮아짐으로써 보수력을 증가하였으나 조직감의 증가는 나타나지 않은 반면 1%의 TGase의 첨가는 타피오카의 첨가유무에 상관없이 조직감을 증가시켰다. 따라서 TGase를 1% 첨가하고 타피오카 전분을 첨가할 경우 겔강도의 증가와 함께 보수력을 증진시킬 수 있을 것으로 판단된다.

Keywords

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