Changes in the Quality of Ground Pork Loin Adding Olive and Soybean Oil During Cold Storage

This study was carried out to investigate the effect of the addition of olive and soybean oil on the color, water holding capacity, cooking loss, increase rate of thickness, decrease rate of diameter, pH, VBN content and TBARS value of ground pork loin during cold storage for 15 days. Ground pork loin were prepared by three types such as ground pork loin containing 20% pork fat (GP-P), ground pork loin containing 20% olive oil (GP-O) and ground pork loin containing 20% soybean oil (GP-S). The $L^{\ast}$ (lightness) and $b^{\ast}$ (yellowness) value of GP-P, GP-O and GP-S were not significantly different during storage, and the $L^{\ast}$, $a^{\ast}$ and $b^{\ast}$ value of GP-P were higher than those of GP-O and GP-S (p<0.05). The water holding capacity tended to increase along with storage period, the water holding capacity of GP-P was higher than that of GP-O and GP-S. Also, the cooking loss of GP-P was lower than that of GP-O and GP-S (p<0.05). The increase rate of thickeness by cooking increased along with storage period, but the decrease rate of diameter was tend to decreased with increase in storage period (p<0.05). The pH of all ground pork loins decreased until storage at 5 days, but increased at 15 days (p<0.05). The VBN content of all ground pork loins increased along with storage period, and the VBN content of GP-P was higher than that of GP-O and GP-S (p<0.05). The TBARS value of all ground pork loins increased along with storage period; also, the VBN content of GP-P was the highest among all ground pork loins and GP-O was the lowest among all ground pork loins (p<0.05).

올리브유 및 대두유를 첨가한 돼지등심 분쇄육의 냉장 중 품질변화

본 연구는 올리브유 및 대두유의 첨가가 돼지 분쇄육의 냉장 중 품질에 미치는 영향을 검토하기 위하여 돼지지방을 첨가한 분쇄육(GP-P), 올리브유를 첨가한 분쇄육(GP-O) 및 대두유를 첨가한 분쇄육(GP-S) 등 세 종류의 분쇄육을 제조하고 냉장 중 색깔, 보수력, 가열감량, 두께의 증가율, 직경의 감소율, pH, VBV함량 및 TBARS값을 측정하였다. 저장 중 $L^{\ast}$ 및 $b^{\ast}$값의 변화는 없었으나, 돼지지방을 첨가한 분쇄육의 $L^{\ast}$, $a^{\ast}$ 및 $b^{\ast}$값이 올리브유나 대두유를 첨가한 것보다 높았다. 보수력은 저장 중 증가하는 경향이었으며, GP-P의 보수력이 GP-O 및 GP-S보다 높았다. 그리고 가열감량은 GP-P가 GP-O 및 GP-S보다 낮았다(p<0.05). 두께의 증가는 저장 중 높아졌고, 직경의 감소는 저장 중 낮아지는 경향이었다(P<0.05). 그리고 GP-P의 두께 증가율 및 직경 감소율이 GP-O 및 GP-S보다 더 컸다(p<0.05). pH는 저장 5일째 감소하였다가 그 후 저장말기까지 증가하였다(p<0.05). 분쇄육의 VBN함량은 저장 중 증가하였으며, GP-P가 GP-O 및 GP-S보다 함량이 높았다(p<0.05). TBARS값은 저장 중 증가하였으며, GP-P가 가장 높고, GP-O가 가장 낮았다.