Effect of Frequency Intensity on the Ohmic Thawing Process in Frozen Gelatin Matrix

Effect of Frequency Intensity on the Ohmic Thawing Process in Frozen Gelatin Matrix

This study was designed to investigate effects of AC frequency on the thawing process, using laboratory scale ohmic thawing system. The ohmic thawing property of 30% gelatin matrix was examined by using low frequency alternating current (20 Hz-110 Hz, sine wave). When the voltage was fixed to 50V, thawing time was negligible influenced as the frequency decreased. Total thawing time of the gelatin matrix decreased sharply at the frequency of 50 Hz. The current flow was first observed during the thawing process in the temperature ranges of -5℃ ~ -3℃

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