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Thai) 1:
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Radio frequency (RF) cooking was compared to water bath (WB) cooking in terms of heating rate, temperature
distribution, and the quality of cooked meat. Packaged fresh and marinated chicken breast meat were
cooked in a continuously moving belt RF oven at 27.12 MHz until the center of the meat reached to 74 °C
at the coldest point of the package. The time to reach end point temperature in the RF oven was 23.8 min
for 1.36 kg packages, whereas it took 41.3 min to cook in the WB. RF cooking time was 42.4% lower than
WB cooking time. Despite RF cooking resulting in a higher heating rate, better temperature distribution
was observed for WB cooked breasts. Cook yield, moisture content, pH, expressible moisture, and shear
value of RF and WB cooked meats were similar. However, RF cooked meat had lower a* (redness) and higher
hue angle values than their WB cooked counterparts. Marination increased the cook yield, moisture content,
tenderness, and pH value. Addition of ι-carrageenan to the marinade further increased the cook yield, moisture
content, and tenderness of the cooked breasts. Neither marination nor addition of ι-carrageenan affected
the expressible moisture of cooked meat.
Industrial relevance: We have conducted our experiments in a pilot-scale RF oven. This machine is designed
for the use of food industry and has 6 kW power. We have tried to find out another application of this machine,
therefore we have established a procedure to cook chicken breast meat in the RF oven. Our experimental
design might be the starting point for the food industry to develop this cooking process.
While planning this research, we thought that pre-cooked and packaged chicken breast meat will be a good
option for the restaurants to deal with the food safety regulations and foodborne illness outbreaks. Furthermore,
this will lower their cost, which food industry will also take advantage of.
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