Application of pulsed electric field prior to vacuum drying: Effect on drying time and quality of apple tissue

Q3 Agricultural and Biological Sciences

Research in Agricultural Engineering Pub Date : 2022-06-07 DOI:10.17221/93/2021-rae

Aleksandra Matys, D. Witrowa‐Rajchert, O. Parniakov, A. Wiktor

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引用次数: 4

Abstract

The study aimed to determine the influence of a pulsed electric field (PEF) treatment on vacuum drying (VD) of apples and their selected quality parameters. The apples were treated with a PEF at 1 kV·cm–1 (with a variable amount of the specific energy input: 1, 3.5, and 6 kJ·kg–1) before VD at 4 kPa (with a variable drying temperature: 40 °C, 55 °C, and 70 °C). The drying time, microstructure, retention of total phenolics (TPC) as well as the antioxidant activity of the obtained dried materials were studied. As a result of opening the cell structure of the apple tissues, the PEF significantly (P < 0.05) reduced the drying time – depending on the used process parameters – by 6–22%. Moreover, an increase in the drying temperature also shortened the drying time. The electroporation led to obtaining porous materials after drying, and with the higher amount of specific energy during the PEF pre-treatment that was applied, a higher porosity was observed in the dried apples. After the PEF-assisted VD, a significant (P < 0.05) decrease in the TPC (by 12–40%) and antioxidant activity (by 23–81%) were observed.

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脉冲电场在真空干燥前的应用：对苹果组织干燥时间和质量的影响

本研究旨在确定脉冲电场(PEF)处理对苹果真空干燥(VD)及其品质参数的影响。在4 kPa(干燥温度分别为40℃、55℃和70℃)的干燥条件下，将苹果进行1 kV·cm-1的PEF处理(输入比能分别为1、3.5和6 kJ·kg-1)。研究了干燥时间、微观结构、总酚(TPC)保留量和抗氧化活性。由于打开了苹果组织的细胞结构，PEF显著(P < 0.05)缩短了干燥时间(取决于使用的工艺参数)6-22%。此外，干燥温度的升高也缩短了干燥时间。电穿孔导致干燥后获得多孔材料，在PEF预处理过程中，随着比能的增加，干苹果的孔隙率也会增加。pef辅助VD后，TPC降低了12-40%，抗氧化活性降低了23-81% (P < 0.05)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Research in Agricultural Engineering Engineering, agriculture-

CiteScore

1.40

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Original scientific papers, short communications, information, and studies covering all areas of agricultural engineering, agricultural technology, processing of agricultural products, countryside buildings and related problems from ecology, energetics, economy, ergonomy and applied physics and chemistry. Papers are published in English.