This study investigated the effects of high pressure, in combination with heat, for development of a ready-to-eat
salted duck meat product. Duck breast was subjected to a salting and pickling process prior to either heatingalone
(70°C) or high-pressure (200MPa)with heating (70°C) for 10 or 20min, and comparedwith a cooked control
(core temperature 80°C at 0.1MPa) for quality assessment. Comparedwith the cooked control, pressure-heat
treated samples exhibited reduced cooking losses, and NMR showed they had larger fast-relaxation proton compartments.
Pressure-heat preserved some sarcoplasmic and connective tissue proteins, but caused greater denaturation
of actin than with heat-only samples. The reduction in microbial load with pressure-heat indicated
suitability of the process for ready-to-eat products. Pressure-heat treatment did not affect color, but there was
a decrease in hardness and gumminess, suggesting higher palatability. The reduction in cooking losses, resulting
fromaltered proton compartmentalization, and changes in myofibrillar proteins enhanced product acceptability.
Industrial relevance: The application of high hydrostatic pressure technology for food processing has gainedmuch
interest over recent decades because of its benefits over conventional methods. Its suitability for ready-to-eat
Nanjing-style salted duck meat product was determined by assessment of proton compartmentalization andmobility
by NMR, extent of protein denaturation by DSC, microbial numbers, surface color and texture which described
product acceptability, palatability and microbial safety. This single-step process will aid the meat
processing industry in improving existing processing methods by incorporation of high pressure technology to
improve product quality and process efficiency.
This study investigated the effects of high pressure, in combination with heat, for development of a ready-to-eat
salted duck meat product. Duck breast was subjected to a salting and pickling process prior to either heatingalone
(70°C) or high-pressure (200MPa)with heating (70°C) for 10 or 20min, and comparedwith a cooked control
(core temperature 80°C at 0.1MPa) for quality assessment. Comparedwith the cooked control, pressure-heat
treated samples exhibited reduced cooking losses, and NMR showed they had larger fast-relaxation proton compartments.
Pressure-heat preserved some sarcoplasmic and connective tissue proteins, but caused greater denaturation
of actin than with heat-only samples. The reduction in microbial load with pressure-heat indicated
suitability of the process for ready-to-eat products. Pressure-heat treatment did not affect color, but there was
a decrease in hardness and gumminess, suggesting higher palatability. The reduction in cooking losses, resulting
fromaltered proton compartmentalization, and changes in myofibrillar proteins enhanced product acceptability.
Industrial relevance: The application of high hydrostatic pressure technology for food processing has gainedmuch
interest over recent decades because of its benefits over conventional methods. Its suitability for ready-to-eat
Nanjing-style salted duck meat product was determined by assessment of proton compartmentalization andmobility
by NMR, extent of protein denaturation by DSC, microbial numbers, surface color and texture which described
product acceptability, palatability and microbial safety. This single-step process will aid the meat
processing industry in improving existing processing methods by incorporation of high pressure technology to
improve product quality and process efficiency.
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