This study investigated the effects of temperature (50°C, 55°C, and 60°C) and time (12 and 24 h) on the cookery properties of sous-vide (SV) processed pork loin. As an indicator of cookery properties, cooking loss, expressible moisture (EM), pH, differential scanning calorimetry (DSC), shear force, total plate count (TPC) and CIE color were measured and compared with fresh (FC) and cooked control (CC, 75°C for 30 min). SV treatments at 50°C showed higher tenderness and lower cooking loss comparing to CC. DSC result indicated that thermal transition of collagen was a key factor affecting the cooking loss and shear force of meat. In comparison of CC, risks of insufficient pasteurization and uncooked color generation were not shown in SV processed meat. Therefore, the results indicated that SV had a potential advantage to produce tender and moist meat, and the best SV condition of pork loin was estimated at 50°C for 24 h.

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This study investigated the effects of blanching conditions on the quality characteristics of burdock, lotus root, and garlic scape. The selected plants were blanched at varying temperatures (70-100°C) for 1-5 min, and moisture content, shear force, color, and total microbial count were analyzed. Burdock exhibited browning discoloration when it was blanched at a relatively low temperature (70-80°C). In addition, thermal tenderization of burdock was not evident in the blanching conditions adopted in this study. Blanching affected the tenderness and moisture content of lotus root without deteriorative discoloration. In particular, low temperature blanching (80°C) was favorable to blanching lotus root. Alternately, thermal tenderization of garlic scape was possible by blanching at 80-100°C for 3-5 min, while discoloration of the blanched garlic scape dominated at high-temperature blanching (100°C). Consequently, the result indicated that low temperature for a long time (80°C and 3-5 min) provided a better blanching condition for lotus root and garlic scape than high temperature applied at a short time (100°C and 1-3 min).