文章基本信息

标题：The Impact of Pulsed Electric Field on the Extraction of Bioactive Compounds from Beetroot
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作者：Malgorzata Nowacka ; Silvia Tappi ; Artur Wiktor 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2019
卷号：8
期号：7
页码：244-255
DOI：10.3390/foods8070244
出版社：MDPI Publishing
摘要：Beetroot is a root vegetable rich in different bioactive components, such as vitamins, minerals, phenolics, carotenoids, nitrate, ascorbic acids, and betalains, that can have a positive effect on human health. The aim of this work was to study the influence of the pulsed electric field (PEF) at different electric field strengths (4.38 and 6.25 kV/cm), pulse number 10–30, and energy input 0–12.5 kJ/kg as a pretreatment method on the extraction of betalains from beetroot. The obtained results showed that the application of PEF pre-treatment significantly (p < 0.05) influenced the efficiency of extraction of bioactive compounds from beetroot. The highest increase in the content of betalain compounds in the red beet’s extract (betanin by 329%, vulgaxanthin by 244%, compared to the control sample), was noted for 20 pulses of electric field at 4.38 kV/cm of strength. Treatment of the plant material with a PEF also resulted in an increase in the electrical conductivity compared to the non-treated sample due to the increase in cell membrane permeability, which was associated with leakage of substances able to conduct electricity, including mineral salts, into the intercellular space.
关键词：pulsed electric field; extraction; bioactive compounds; red beet