Ultrasonic techniques have long been used in thefood industry both in food analysis and in food processingand preservation. One can also use them inorder to increase the level of safety of food products.In food technology primarily utilized is the ability ofultrasonic waves with high power and low frequency(20-100 kHz) to induce a cavitation effect, which affectsthe physicochemical and biochemical propertiesof the material, in particular the disintegration of thecell structures [Kapturowska et al. 2011, Dolatowskiet al. 2007]. The action of acoustic waves (ultrasound)on plant tissue causes a number of contractions, leadingto the removal of water and gives an effect similarto “squeezing” of a sponge. This procedure contributesto the formation of microscopic canals and improvesthe capillary fl ow of osmotic solution to theintercellular spaces of the dewatered material [Dengand Zhao 2008]. In recent years, many studies havebeen presented, using the sonication effect for osmoticdehydration as an alternative enabling the executionof the process at lower temperatures [Fernandes andRodrigues 2007].
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