Özet:

In this study, the effect of the drying method by freezing on the drying characteristics of zinc samples, the color, the microbuilding and the hydration characteristics. Experimental findings have shown that the drought rate has decreased both with increased drought time and with the fall of moisture content in samples. 10 mathematical models have been applied to experimental data to select the best thin layer drying model in drying processes. Based on statistical parameters, the Page model with the lowest quarter (χ2) and the quarter of errors' quarter average (RMSE) values, as well as the highest indication rate (R2) values, was found as the best model for determining the corporate behavior of zencefil samples. All color parameters of fresh zencefil are affected by the freezing application. The dried samples were not dark, the parameters of yellow (b*), chromium (C) and Hue angle () were reduced, while the values of brightness (L*) and green (a*) were increased. The microbuilding changes of fresh and dried zencefiles have been studied by a light microscope and a scanned electron microscope respectively. The scaned electron microscope, frozen images, demonstrated that dry samples have a porous and uniform structure and well preserved their spots in the niche. The highest hydration rate of frozen products was 5.20.

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