The objective of this study was to evaluate the effect of formulation changes on the temperatures of the
reconstituted potato flakes following a standardised microwave reheating using a response surface
method. Reconstituted potato flakes with elevated levels of fat (0.6–11.1%), water (69–78.7%) and salt
(0–5.7%) were prepared. Thermal properties (thermal conductivity, thermal diffusivity, specific heat
capacity) and dielectric properties (dielectric constant, loss factor and penetration depth) were evaluated.
The reconstituted potato flakes were reheated in a microwave oven and the temperatures were recorded
during and after microwave exposure. Temperatures during reheating decreased with increasing water,
butter and salt content. Results show that temperatures during microwave reheating require empirical
measurement as opposed to prediction due to changes in composition, thermal and dielectric properties.
Reformulation offers the manufacturers an option for altering the temperatures following microwave
reheating, however, the magnitude of the formulation changes required may be quite large. The data presented
is useful in the preparation of computer models and simulations of microwave heating.
The objective of this study was to evaluate the effect of formulation changes on the temperatures of thereconstituted potato flakes following a standardised microwave reheating using a response surfacemethod. Reconstituted potato flakes with elevated levels of fat (0.6–11.1%), water (69–78.7%) and salt(0–5.7%) were prepared. Thermal properties (thermal conductivity, thermal diffusivity, specific heatcapacity) and dielectric properties (dielectric constant, loss factor and penetration depth) were evaluated.The reconstituted potato flakes were reheated in a microwave oven and the temperatures were recordedduring and after microwave exposure. Temperatures during reheating decreased with increasing water,butter and salt content. Results show that temperatures during microwave reheating require empiricalmeasurement as opposed to prediction due to changes in composition, thermal and dielectric properties.Reformulation offers the manufacturers an option for altering the temperatures following microwavereheating, however, the magnitude of the formulation changes required may be quite large. The data presentedis useful in the preparation of computer models and simulations of microwave heating.
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