For ultrasonic pretreatment with different powers, with the increase in power, some materials will have slight enzymatic browning, resulting in a decrease in the lightness value and redness value of the yam, while the yellowness value shows an increasing trend due to pigment changes [ 36 ].
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Study on the Effect of Ultrasonic and Cold Plasma Non-Thermal Pretreatment Combined with Hot Air on the Drying Characteristics and Quality of Yams.
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