山西农业大学学报（自然科学版）2013，Vol.33Issue(3)：230-235,6.
高压脉冲电场对果蔬介电特性影响的试验研究
High Pulsed Electric Field Experimental Study on Effect of Fruits and Vegetables Dielectric Characteristics
摘要
Abstract
High-voltage pulsed electric field become the research hot topic due to its peculiar advantages as one of the non-thermal technologies in recent years,which could be used for the pre-treatment of the freeze drying process and could improve the dehydration rate of fruits and vegetables.During this process,the effects of electric parameters on dielectric characteristics of fruit and vegetable should be well studied.As research material,apples were pre-treated with the high-voltage pulsed electric field of the frequency at 1000 Hz and the effect of pulse voltage,pulse frequency on apple's equivalent capacitance and equivalent impedance were measured.SAS software was used to analyze the mathematical models developed from the data of the equivalent capacitance,equivalent impedance and the three-dimensional figure of pulse voltage,frequency and the dielectric properties.The results showed that dielectric characteristics of fruits and vegetables were decreased with the increase of pulse voltage and pulse frequency as regression effect in all three mathematical models and three-dimensional figure.Apples were freeze dried after pretreatment with high-voltage pulsed electric field,and the optimized process parameters with high-voltage pulsed electric field were detected by the method of response surface design.The results showed that the optimal process parameters were the pulse voltage at 1480 v,the pulse frequency at 88 Hz and the pulse number of 46.关键词
高压脉冲电场/电压/频率/介电特性/工艺优化Key words
High-voltage pulse electric field/Voltage/Frequency/Dielectric characterization/ Optimized Process parameters分类
农业科技引用本文复制引用
马飞宇,郭玉明..高压脉冲电场对果蔬介电特性影响的试验研究[J].山西农业大学学报（自然科学版）,2013,33(3):230-235,6.基金项目
国家自然科学基金项目(30771242,31171450) （30771242,31171450）
