Fig. 1—Thermal histories at the surface and at the center of the fruits: (a) mango frozen by air-blast method, (b) peach frozen by liquid nitrogen, and (c) mango frozen by HPSF method. t0 : Time
elapsed from the moment that the surface reaches the initial
freezing point to the moment that the center reaches a tempera- ture 10°C below this initial freezing point. Figure also shows charac- teristic time, t , at the center of the samples: Time elapsed from the moment that the center of the fruit reaches the initial freezing point to the moment that this same point reaches –15°C.